DE2353952A1 - CONTROL SYSTEM FOR A STRIKING DEVICE - Google Patents

Description

Ότ. HatisMetfinffi William ö ^^ wiismoen

"Df. Diet" Weber -S ^^ Lh ^ V *

Diploma Phys. Klaus Seiffett ^ .. ΐ £ 2ΞΤ «» ».

§GEisi_S2i.221-§55 _; 2353952

Ghäinlaersbürg Engineering Göapaiiy Derbysllisie Road, Ghainbersburg, Pennsylvania / USA

CONTROL SYSTEM FOR A SCiDLAG DEVICE

Priority from ^ Ö ^ Octöb ^ r ^ lg ^? ^{in ÜSA} "

v 301.655

The invention relates to a control system for an impact device with a compressible flow agent »in particular the present invention relates to a tax * medium, which determines the impact force or impact force of the direction of impact by using open time set inrifeh * · control * which controls the opening time of a control valve * would control ^ which the current from an ionic pressure flow with « telzufuhr measures into a cylinder, one the ram the impact device has driving pistons * The present invention does not allow only the timing a single saw saw or impact, but the execution of butts in a repeatable, variable intensity -.-_. "■ ....... - - «" 2--

Posfsäi'ei: FiSnKfiift / M «fn W6S-6Ö4 Bink: Drudher Bank Aö. Wiesbaden. Könto no. 'S76S07

program or pattern where the intensity all the way through the pressure of the propulsion fluid admitted to the cylinder is controlled.

U.S. Patent No. 3 ^ 64 315 by H.A. Weyer with the Title "Pneumatic Servo Control System for High Speed Impact Devices", d ± e also belonging to the assignee of the present invention describes an impact device with mechanical controls that propel a drive fluid allowed by the pressure of the JZU to the cylinder Generate shock. The operation of this striking device is automatic, striking repeated strikes when your throttle valve remains in the operating position. What is compressed by the piston moving into the impact position Fluid is collected in a tank as soon as it is compressed, and the energy thus stored is is used to return the ram to the retracted position, with the retracted position being on is at a constant level from the point of impact.

Another U.S. Patent No. 3 0 ^ 3 271 which also belonging to the assignee of this invention relates to a control system for a percussion device, e.g. Forge or die press. There strokes of variable length are used to create a pattern or group of To achieve impacts of variable intensity, in contrast to the present invention, in which the impact ink

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sity by the fluid pressure driving the ram is regulated. -. "·

Other non-assigned US patents which are considered in connection with this invention are US Patents Kr _c 2,933,068 and 3,133. Johnson & Kern Patent 2,933,068 relates to a pneumatically operated impactor using a mechanically adjustable retainer to hold the piston of the device at the top of its stroke. The change in the retention force leads to a change in the developed impact pressure and a consequent change in the impact intensity. There are no suggestions for the timing of the pneumatic or compressed air impact to regulate the impact intensity. '

U.S. Patent 3,133 ^ 7? describes the control of the Using fluid flow in a percussion device of valves and regulating devices, because which the impact frequency and the impact force varies independently will. The impact force is controlled in part by the pressure of the fluid that admitted to the piston face and partly by the time interval over which the fluid is able to enter the cylinder. The time interval is determined by the pneumatic differential pressures, which act in the valve is generated. The engagement time of this Valve is adjustable and depends on spring rates,

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the membrane stiffness e and the differential areas, down, up those opposite compressed air t forces iewxrken ·. an apprenticeship according to the invention. for the use of a time setting device to control the opening and closing of a main valve * is not suggested. According to the invention

the variable inlet time changes the ram speed. -

The present invention is concerned with a lift controller or impact control and is_in particular for impact devices broadly as useful as described in U.S. Patent 3,464,315, but which must be modified in order to be useful and applicable to the control system according to the invention. The control system of the present invention is also useful for different impact devices of the same general class. In an "indicative" manner, the present invention provides a device for the generation of variable intensity beats by the fact that the inlet or the Supply of pressurized solvent, normal air, with precisely timed intervals for the ram drive is controlled. Pur a fixed loading pressure the ram speed is determined by the time interval, while the compressed air is allowed to the cylinder. Furthermore, the invention allows for the first time an established group or pattern of Beats the same or changed. Intensity that before formed so that the pattern is precisely repeatable.

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If desired, on the other hand, the system enables manual operation and also allows the pattern to be interrupted if so desired. For example, the preselected program can be interrupted between selected prints "or groups of prints, also called" stations * ¹ or "sequences". On the other hand, the device can be interrupted by any number (including all) of ^ Stations continuously hit or push. The stations are formed as a continuous sequence of hits of the same 'preselected; intensity. ■''.

In particular, the invention relates to a beating device for a beating device with at least one cylinder holding frame. Is _ 'j enemZylinder by a suitable means such: a piston in aii a ram mounted »d'ASA relative to this: frame von'einor retracted position in a Schiagpösitxon is movable. A fluid supply unit has a drive fluid supply and a valve for admitting compressible fluid from $ en && Drive fluid supply to at least one cylinder, at a position lh the cylinder, do the ram in the shock position; The control system has an actuation device for opening and closing the valve, including a time setting device for determining the time, duration during which the valve remains open; A; DTOckreguii ^ gihrrichtung for the maintenance of the Fiießpittelötrulckesr in the superplasticizer supply, essentially on a constant ¥ ert _t

is also provided; likewise a measuring device in the supply system, so that a by the time setting device allowable flow of fluid for selected small times determines the pressure in that cylinder, which do Ram for each small selected time with a different one to drive predetermined force.

A preferred facility, such as a tank in connection with the cylinder is provided in such a position or arrangement that in the cylinder and the tank, Fluid medium compressed by the piston moving the ram into impact position provides stored energy, to withdraw the ram when the. Fluid agent— later release pressure from the other side of the piston will.

Preferably, the time setting device is adjustable or adjustable in order to make beats of different, past- certain energy corresponding to the selected small To provide time units. Furthermore, the time setting device is preferably provided with discrete very small positions in order to make beats more selected and repeatable Provide impact intensities.

To provide a programmer there is at least one Counter provided to a predetermined number of beats to count with selected impact intensity, and one

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Follow-up or sequence device is forgotten to bind st ens this one time enumerator the time; the valve opening for different - predetermined times in one to control a predetermined sequence or sequence. An on; A stop device is provided which interrupts the program at any time, or a stop device can be provided to stop a program at a predetermined time Place alternatively to interrupt ^ to it afterwards to continue. -

Further advantages, features and possible uses of the The present invention will become apparent from the following description in connection with the drawings. Show it:

Fig. 1 is a diagram of a striking device and VSteuerkonsole ^ showing the direction of valve assembly for inlet, pressurized fluid admitting a position for inlet of fluid under pressure for the drive of the ram 'withdrawn from the shown Position in stroke position,

Fig. 2 is a similar diagram showing the same Impact device, "with its valve device itself is in a different position in which the outlet of the cylinder is made possible and the ram from the The impact position is allowed to return to the retracted position,.

2a shows an enlarged sectional view of the main valve showing the same in the withdrawn emptying or blowing position,

Figure -3 is an enlarged front view of the front surface the control console, *

Is applied, - Fig * h a Energiekalibrierkarte ₉ 'in which the impact intensity, as a percentage estimated or calculated magnitude against the impact intensity positions corresponding to the time intervals for different constant Antriebsfließmitteidrücke,

5 is a schematic circuit diagram, partly in FIG Block form, showing the alternating current part of a preferred control circuit, and

Figures 6a and 6b together are a circuit diagram of the DC part a preferred control circuit «

In Figures 1, 2 and 3 there is shown a pneumatic percussion device which, in its preferred form, is a high speed, sequence program controlled die with suitable controls. The device shown is very schematic. shown because the hammer itself has, to a large extent, the same general construction as that of TJS Patent 3 h6h 315, to which reference is made for further constructional details. '. "- - - 9 -

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Fig. 1 shows the preferred embodiment of this invention

dung schematically. with the ram in the retracted position. Fig, 2 shows / the same hammer _? with its ram in the striking position. . '

The performing shown is an Hochgeschwindigkeitsgesenkhammer for Flachgesenkarbeit and embossing swaging, the · .- "" ■ 'controlled sequence program by an electrical system, as opposed to the mechanical DruckluftseTvosteuerungsanlage the aforementioned patent controlled is _t which contributes to a wide range of differences in control feature . ^v . ^-: ..- "·"

Similar to the earlier device, the main parts of the hammer are the anvil 10, a pair of upright lamb bodies 12, and a yoke 1 * t. These parts are screwed together in the usual way for fine machines of this type in order to adapt to severe shock vibration forces . on * The yoke 14 is with yersahiedeneij-. Holil'ip'äum ^ ü provided, the largest of the centrally located! Cylinder 16, which is generally a straight "-kreisföfiuige cylindrical FormntLt has a vertically oriented axis * Xu this cylinder there is a piston 18 by air pressure of Kinführung nacl <jben and. is moved down. The tuft is through openings; in the walls of the cylinder in these

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introduced and removed from it. The piston 18 is through a piston rod 20 is connected to a ram 22. The piston rod goes through appropriately sealed bushings or HuI-. sen to prevent air leakage from the cylinder along the piston rod to prevent"

The ram is always in contact with or in close proximity to guide pieces Zh and is guided by them, which are screwed onto the frame body 12, of which four guide pieces are preferably used to ensure the same ram setting when pushing, blow after blow. The anvil 10 or the ram 22 carry forging dies 26a and 26b, between which a metal material to be forged in a conventional manner is inserted. The piston 18 is provided with suitable piston rings which effectively prevent flow around the edges of the piston between it and the cylinder walls. The cylinder preferably has a removable cylinder liner that provides a uniform cylinder wall and abrasive surface for cooperation with the piston 18. The top of the cylinder is closed by a suitable cylinder head 28, which is preferably screwed to the yoke Ik. A reservoir 3 ° communicates with the cylinder 16 at the bottom of the cylinder 16 through the passage 32. Compressed air is fed into the tank 30 by suitable feed means, not shown, which are provided with pressure regulating means which are arranged so that air is only admitted when the pressure is increased

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drops ert under a vorbestiinmüen ¥ "If a large he _s is admitted air pressure to blow · = · (upper) side of the piston 18 to push the piston downward to drive the Ramme22 for the impact is air from the bottom of the cylinder through the passage 32 into the tank 30 -pressed ₉ and in this process the entire volume of air .kote ^ rimier ^ Zy-'linder, over the'koblasen-blown out, the air pressure in this iäsik 30 drives the piston back to the top. Piston in its shown in Fi ^ ₀ 1 retracted abutment condition "imr" by the air pressure: normally is held _o 30 This pressure is sufficient without arideres me chanisches -under the piston ukd the tank. Retention is introduced out to the ram for use bereitzuhäiten _f · to Antriebsluf-t xiieder About the flask. -. · ■ '.

The present invention provides a constant fluid pressure supply. 3Äj \ which is used directly to scarf.tventiieii pressure. and which to the selected pressure for use durch.den master cylinder is regulated by an adjustable 'Druckregulatpr 36. The regulator 36 allows the constant pressure which is supplied to the inlet line 38 through the fluid pressure supply 3 ^ to be eliminated. A response or release valve 40 is arranged in the inlet duct. Usually, in the course of operation, the response valve is initially opened mechanically 9 in order to make the system ready for operation. However, a solenoid actuator Λ6 responds to an emergency pushbutton, " - ■; '.:. '. '■■""■' -. ■ '. - 12 -

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to close the response valve, turn off the fluid pressure supply, purge the downstream pressure, and that To stop or stop the progression of the RamnE towards the strike to break. At the end of the inlet line 38 is the Hauptyenti ^ L 42. This-has three positions. In the open, In the position shown in FIG. 1, the valve slide 41 by pilot or switching air against the spring pressure in his held in the lower position so that the air from line 38 directly to the cylinder 16 above the piston 18 by conduit 37 iii Connection is coming. In the -closed one shown in FIG Position, the slide 41 has been moved upwards by the spring pressure, so that the inlet -of. the line '37 is separated and the cylinder 16 through line 37 with the Outlet line 44 is connected. The main valve 42 is to the open position shown in Fig. 1 by a solenoid 50 operated, which a switching valve 48 in the pilot or Switching supply line direct from the fluid pressure supply 34 actuated.

2a shows the main valve 42 in a special position, by applying or requesting the cup-shaped Switching valve body 43 is guaranteed »to the contrary Spring pressure to go up in the position shown. When the switching valve 52 is adjusted by the energization of the solenoid 54 the fluid pressure supply is in communication with valve 42, which is in that shown in FIG Position moved to stop or prevent the flow of air from the cylinder 1.6 in a condition such as the

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last stroke of a series, where the continuous text pressure cannot be fed into the cylinder 16 above the piston in order to elastically absorb its upward movement. Under these circumstances, the oil actuator 5 ^ a switching valve 52 moves the main valve piece 43, a cup-like body, into the position shown in Fig. 2a in order to partially close the evacuation line. The cup 43 provides nu ± 'a narrowed passage to the exhaust line or Entieerungs- kh and prevents, therefore, slow down the flow of exhaust air zn · to the high-going piston 18th The solenoids ^ O and 5k and their switching valves 48 and. $ 2 for the actuation of the main valve k-2 are preferably spring-mounted on top of the crown of the machine. ,

• Another char. The embodiment of the invention shown here is a safety piston or plunger 56, a movable stop body which is arranged so that it limits the upward movement of the piston 18 to a point under the line.37 of the main valve k2. As shown in FIG. 2, the safety hex ram 56 is "when the die

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works, withdrawn by solenoid 58 "

In the position of the ram 22 during its upward movement is a position sensing body 60 at a predetermined position provided along the upward path of the ram to be operated at that point by the ram. / The switch can be adjusted along its support rod

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through which it is attached to the frame 12. The switch 60 is used to start the return of the main valve to the open position , to let the fluid flow from the fluid supply 3h into the cylinder 16, as will be described later, this switch also triggers a timing relay which determines how long the valve 42 remains in the open state and thus determines the intensity of the blow.

The described operation of the machine is triggered by the use of a foot pedal 6h which provides a switch which, depending on the operator's comfort, can be operated to operate the ram by hand, if it is set for manual operation, or to interrupt operation and start over again.

Also shown in Fig. 1 is a control panel, generally designated 66, which controls the electrical circuit for actuating the die in a preprogrammed sequence of strikes in a manner that is determined by the Manual selection device is determined, which is the area generally designated 68 and shown in greater detail in FIG occupies.

Before giving a detailed consideration of the selection and display device shown in FIG. 3, it is desirable to understand the capability of the control device located in the control cabinet 66 . The tax income

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direction according to the invention allows the operating _person} the Schlagihtensifcät the ram at a particular Gesenkbetrieb, characterized _ausswählen? that the period of time is admitted during which the main valve 42 to the fluid supply is open β Since the flow from the fluid 5ufxxhr to the cylinder 16 Ip is limited and takes a finite time * / to reach the trolling pressure of the fluid supply is for a given Fluid Supply Pressure is the pressure of the supply cylinder 16 across the piston. 18, the greater the longer the Yehtil-is open to a certain point. For repeatability for the reliability of the setting, diskSrete small times are provided according to the increasing impact intensity settings for increasing the time »

Fig. H shows the effect of changing stroke intensity for a given supply pressure, where the stroke intensity is expressed as a percentage of the estimated or measured magnitude A change in that pressure also causes a change in the effect shown in the illustration of Figure H. However , usually the lifting air pressure supplied under the piston 18 is maintained at a constant predetermined amount indicated on a lifting air pressure gauge 70 on the console 66. This pressure is kept constant by an increase pressure regulator. If necessary, the increase pressure can be: - ■ ..- ■■■■ ■■■■ ■ '' ■ .'-.-. ■ .._ ■ '^; - 16 -

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can be modified by key 72. Also is the Drive or impact air pressure on gauge 74 is shown. Again the air pressure is regulated to keep it constant at a fixed setting, but the regulated one Pressure can be changed by a setting button 76 will.

In addition to the choice of the power of the blow via the setting the time according to the invention it is also possible to determine the number of beats at the given beat intensity select »where the selected for a given intensity Stroke count is known as a "station" of the control program. According to the invention it is possible to have multiple stations to have in each of which a selectable number of Beats of 'selected' intensity are provided. Jn the in Fig. 3 shows the control surface for five stations Provision made * The controls for the various Stations are in their operational sequence by numbers along the rows designated. The first column 78 provides indicator lights 78-1, 78-2, 78-3, 78-4 and 78-5, only of which one at a time is illuminated to indicate which particular station is in progress. The second Column 80 contains selector switch indicators or divisions 80-1, 80-2, 80-3, 80-4 and 8O-5, through which at this particular Embodiment a selection of up to 15 subsequent strokes the same intensity for each station can. The third column 82 contains selector switch divisions 82-1, 82-2, 82-3, 82-4 and 82-5 with ten positions, the

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provide ten discrete _f - preselected beat intensities,; which by the duration of the aordinate. Time setting must be determined! The last column '84 contains restart / resume selectors 84-1, 84-2, 84-3, and 84-4' which allow each station to choose between stopping at the end of the selected beat number without automatically advancing to the beats of the next station and thus only require two position adjustments. Not all of the stations or sequences need to be used. The number of stations used in a particular process is selected by the sequence selector switch 86. As soon as the * beats actually take place, the beats of the current active station are counted by a binary counter and represented by a binary beat count indicator 88, which has four lamps that represent from left to right t, 2, 4 UiId ₁ 8 beats, which are used to determine the equivalent number of beats can be added in decimal units. .

On the surface there is also 9Q for a runout adjustment control taken care of, furthermore a snap safety switch 92 » both of which work as a safety controller. The blow— The setting control must be pressed before the ram is triggered or started. In an emergency, the Non-impact safety holder pressed thereby making the activity interrupted at some steep slope. The total contract can νόίΐ iiahd aciin, in - ». iein simply the foot pillar 64 is used, or. aubohia table., - "by Jas. program .tee»

BATH ORIGINAL

which is set by the control surface 68 , according to which one of the two positions is assumed by the manual automatic selector switch 9h. If desired, an automatic bevel system can be provided and an indicator light 96 on the surface indicates when it is operating.

The control circuit for the control programmer according to the invention is shown very schematically in FIGS. 5, 6a and 6b. FIG. 5 shows a step-down or step-down transformer 98 which connects a 60 Hertz power source to the control circuit so that the control circuit is supplied with II5 Vo ₁ It and 3 amps via lines 100 and 102. In this circuit, the impact setting switch 90 is normally open, and when it closes, it connects the impact setting relay BSR via the 115 VoItkraft lines via the non-impact safety switch 92, which is normally closed and can be opened at any time, e.g. in an emergency, in order to operate cancel the control circuit. The puncture of the impact adjustment relay is such that it closes the normally open contacts BSR-1 in series with the Sc.mltventilsolenoid ' k6 via the power lines, thereby energizing the Schaltcventilsolenoid, which opens aas .schaltventil .40 as described above. The relay BSR provides; normal / otherwise for * open contacts BSR-U ^ n of the power line 1O0, so thatU3 ^ n *> rjio until closing <-it; s Schlageiüstelischalcero \ X0 is not fed through ■ the transformer uleichrichi.e 104, dor 2k full, DC current for <ien operation of the fi ^. f> a and

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BATH ORIGINAL

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6b is generated. Closing the contacts. BSR-2 also provides energy via the foot switch indicator lamp "1Ö.6 through normally closed relay contacts FSR-2 of the foot switch relay and the normally closed contacts 2 P Ϊ, 3 P .1 _s ' h P 1, 5 P and the noxTDaleryeise closed contacts 1PS -1. at the same time the indicator lamp 7S-1 is illuminated for the sequence 1 and indicates _¥ that the first sequence, or sequence is set for the start. \ the footswitch ^ K energized in the closed state, the Fußschalterrelais FSR which normally diepffenen .Kontakte FRS -I closes to energize the safety plunger- * Etisrelease solenoid 58 to retract the safety plunger 56.

The timing device 107 for the inlet and the device 108 for the outlet are both supplied via the power lines TOO and 102. Discharge timer 108 'is normally a single timer that maintains its setting once set, but is normally prevented or held until the contacts of the last impact relay close _? to keep the facility working during the last batch of a series. Its function is to energize the solenoid *> k for a predetermined time to stop the flow of air blown through the valve 52 to slow the return of the ram on the last blow of a series or on other occasions when

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it is likely that the return of the piston 18 will not be counteracted by new _{fluid 3} entering the cylinder. The blowout timing device can also be used, if desired, to control air expansion in the master cylinder.

The inlet timer or the inlet timer usually performs a more complicated function. In certain embodiments, the admission timer actually have a plurality of timers, one for each sequence, or a station. With the present Embodiment, the admission timer is preferably one only timer with multiple settings. Variable resistances, one of which is for each of the corresponding Stations or sequences are intended to be switched one after the other in the timer circuit with a fixed capacitance, to provide the necessary timing or timing provided by the appropriate RC circuitry for each of the episodes is shown. The resistances can be adjusted using conventional potentiometer devices, are preferably provided with stops to indicate the dialing divisions of column 82, which represents the intensity of the beat, to give repeatable discrete settings. Other facilities for a suitable timing can by the person skilled in the art with regard to the advantageous Zeitgöber technique ,being found. . .

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The subcircuit of FIGS. 6a and 6b sees 24 volts direct current via the power lines 110 and 112 from the transformer / rectifier 104 of the Pig. 5 before> ^ er manual-automatic selector switch ^ k is left open as shown for manual operation and closed for automatic operation of the program controller. The closing of the switch 94 actuates the automatic control relay ACR * ■ -. "

The normally open PSR-3 contacts of the foot switch relay are closed by the action of foot switch 64, operation is started, and the start sequence relay SSR is energized to energize relays 1 P and 1 P ^f '. The SSR relay is energized when FSR closes contacts-FSR-3. The energization of the relay SSR also closes the contact SSR-1 and another contact of the relay SSR to start a cycle reset timer 3 TR (not shown) which is arranged similar to the timers 107 and 108 via the power lines 10 0 and 102 . The excitation of the relay ACR opens contacts ACR-1, allowing the series or series of subsequent relays! what cannot happen during manual operation if the contacts ACR-1 remain closed »The contacts ACR-2 and AGR-3 close and complete another current path to the relays, 1 P and IP ¹ through normally closed switch contact ς of the relays ESR and LBR and: through contacts 3 TR-I and SSR-I, the relay 1 P sees normally open contacts 1 P ^ -T VOr ₁₅ which close and the first follow-up lamp

78-1 excite. The relay 1 P enables the restart or continuation of the selector 84-1 and also sets the trigger and timer circuit for the first station, the admission timer 107, in the manner described above. The relay 1 P ¹ sets or forms two contacts 1P ^! -3 the number selected by the number sequences or sequences for selector 86 £. The relay 1P ¹ forms or sets also through contacts 1 P'-4 (Fig. 6b) the number of blows through selector 80-1, the relay 1 makes PS for the end of the first sequence through contacts 1 -P'-2 ready for operation (Fig. 6a) and supplies the second sequence lamp 7S-2 through contacts 1 P'-5 (Fig. 5). The second sequence lamp is held back by other contacts until the last stroke in the series.

The relay 1 P ^{1 also} triggers the inlet timer 107. It is desirable that fluid from the supply 34 immediately when the inlet solenoid 50 triggers the main valve 42 by supplying pilot or switching air to the main valve to prevent the flow of fluid to the top of the The amount of pressure and the amount of force imparted to the ram are proportional to the time during which the valve 42 is open, namely in the sequence shown in Fig. 1 position shown. When the inlet timer 107 times out, it turns off the inlet solenoid '50 and switching valve 48, "with main valve 4-2" at that point, cylinder 16 of

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the inlet supply closes and the cylinder to the exhaust line kh opens, whereby the ram inertia and the pressure remain during this ongoing time of the ram path and drive the ram to impact. As soon as the ram rebounds, air flows out of the cylinder outlet, and under the piston 18 and in the ₁ tank 30 compressed air pushes the ram upwards *. '-

If the ram goes off, if more than one blow or blow is called by the selector switch 80-1, the timer 107 again by the ram going up through switch 60 triggered or triggered and causes a repetition

^ of the "described sequence. That is, the main valve kZ ■ _- is opened to the molding agent return feed-3 ^ by regulator 36 for a time which is determined by the impact intensity selector or -! selector 82-1» The time during which the valve is open, is the same for each beat of the first station or sequence .. With repeated beats, the timer is triggered again and again. In practice, the timer IQ? pulls in other relays, such as ζ. Β *; one such »'which has a number of auxiliary functions, including pulsing the relay which drives the beat counting circuit 114. Each count is indicated by the" binary indicator. 88- displayed. The corresponding 1, 2, k and 8 outputs of the binary counter, which can have flip-flops, also operate the control relays 1 CR, 2 CR, 4 CR and 8 CR when they are switched on. Those

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Relays 1 CR, 2 CR, 4 CR and 8 CR energized by the meter close contacts which are identified by their number of relays in the in
6b, in a pattern representing the count. When a
Coincidence of the stroke dial setting and the count,
which is indicated by a suitable coordination of closed contacts of the control relay 1CR, 2CR, 4CR and 8CR occurs, the circuit creates a continuous
Current path to excite the last impact relay LBR.
In the restart state, LBR is usually held by the footswitch contacts through contacts SSR-2 of relay SSR, as well as the restart contacts and contacts 1 P-2 of relay 1 P (or the corresponding contacts of later sequences or sequences).

The actuation of the last impact relay LBR when the relay SSR is triggered triggers the blow-out timer 108. This energizes the blow-out solenoid 5k _t when a last one

Impact occurs as explained above. Then it works
Solenoid 5 ^ on the valve 52 to partially close the blow-out line kh and thereby elastically absorb the upward movement of the ram. The last ski relay LBR energizes the relay 1 PS via normally open contacts LBR-1 and interrupts the first sequence. Before
the timer can be closed or completed
can, the sequence of the next station must be

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actuating the foot switch 64 to start the relay To excite SSR. Another timer relay triggered or started by the foot switch (and the SSR relay) can be provided to prevent that the workpiece is forged after it has been cooled too much by timing out a Time within which a decision must be made about the continuation or restart of the episode, when the voter or selector 84-1 is in the restart position is brought.

When selector 84-1 is in the continue position, another timer, not shown, reduces the standard time required by the outlet timer 108 by holding the main valve in the exhaust position and allowing the next sequence to proceed immediately. In the continue position of switch 84-1, the last strike relay is held by outlet timer 108 contacts. '

As can be seen from Figure 6b, all are restart-continue switches 84-1, 84-2, 84-3 and 84-4 shown in the "restart" position. In this position, the operator must Break the contact of the foot switch (and FSR) to allow the sequence of the next station to continue. In the continuation position, which one does not shown timer as long as the operator keeps the foot switch closed, another contact group

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closes, there are in operation between the. Stations no Interruption. In the restart position shown, if the corresponding relay contacts, such as 1P-2, by energizing their respective relays are closed, as well as by the relay contacts SSR-2, becomes a hold circuit for the last impact relay formed by contacts LBR-1.

After the first sequence is completed, the normally open contacts 1 P'-2 remain closed, so that when contact LBR-1 closes, relay 1 PS is energized, contacts 1 PS-1 closes for holding purposes and 1 PS-2 closes to energize relays 2 P and 2 P ¹ through normally closed contacts 2 PS-1 and 3 PS-1. After energizing relay 2 P, contacts 2 PS-2 act as holding contacts to keep the relays energized.

As can be seen from Fig. 6a, the circuitry of station 2 is similar to that of station 1 and its operational sequence is essentially the same. The same applies to stations 3 and h, which are therefore shown in block form, it being understood that the pattern or group of contacts and relays is the same. The station 5 only requires one relay 5 Pf since no additional relays have to be set there. Where the relay contacts have been described, the relay is designated without numbering the contacts so that circuit operation is

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Consideration of the relay circuits can be determined to determine when each relay is effective.

The system has been described, while details and alternative possibilities have been omitted ₉ which may if desired be provided in the system according to the invention.

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Claims (1)

Claims / 1.) Lift control system for a striking device with a at least one cylinder, one piston in the cylinder and means for connecting the piston to a Ram-holding frame, such that the ram relative to the frame from a retracted position to a striking position is movable, and with a driving fluid system with a drive fluid supply and a valve device for admitting compressible superplasticizer from the drive fluid supply to at least one Cylinder at a position in the cylinder for the drive the ram in the Schlagpositiori, characterized by an operating facility for opening and closing the Valve, with a timer device for determining the Period of time during which the valve remains open, a pressure regulator for keeping the fluid pressure approximately constant in the drive fluid supply and a measuring device in the supply system, so that the fluid flow for small selected periods of time, which through the timer device allows the pressure in the cylinder to be determined to the ram with different, predetermined To propel power for any small, selected length of time. 2. Plant according to claim 1, characterized in that a discharge means for discharging the driving fluid from the abutment side of the piston driving the ram 40 98 1 97 08 7 4 ■ - 29 - . · '.. ".- 29 - ■■■■■■■■. is provided in the impact position and a lifting device for the withdrawal of the pile driver according to j edem blowing out these tags is provided. 3 · Plant according to claim 2 _S, characterized in that the lifting device has a tank which is located in connection with the cylinder at such a location that fluid is compressed by the piston, which the ram moved in Schlagpqsxtiqn, causing in the sequence blown drive fluid, compressed fluid in the cylinder and a force in the tank for the retraction the ram provides »' H.' * System according to claim -V _9, characterized in that an adjusting and regulating device is provided for the drive flow meter supply pressure. 5. System according to claim X _9, characterized in that the timer is divisible in order to set valve openings in time. For blows of different, predetermined force according to the selected, small times. " 6. Plant according to claim 5 »characterized in that the timer means a predetermined number of selectable, has discrete, small positions, and that the respective position corresponds to a predetermined impact intensity. 7 · Control system according to claim. 6 _t in particular for a HubprogrammierSteueranlage, characterized in that a counting device for counting a preselected number of blows with preselected intensity is provided to allow the control function to be repeated., To repeat the operating cycle for the preselected number. of beating. . 8. Plant according to claim 7 »characterized in that the selected number of beats "with selected intensity by setting an adjustable counter is preselectable. 9 · Plant according to claim 7 »characterized in that the system with an automatic scanning device for the return of the hammer is provided in the retracted position. 10. Plant according to claim 7 »characterized in that an automatic scanning device for the return of the Hammer is provided in the retracted position and the preselected number of blows with a selected one Intensity by setting an adjustable counter is preselectable. 11. Plant according to claim 10, characterized in that a variety of adjustable Zextgeborexrii'i.eiituiig-en provided is, each of which can be chosen, previously marked 4098 19 J087 ^ kO ν - τι - ZextexaisteXZposxtxoÄerL for beats of predetermined intensity and the sequence or follow-up device is so provided is that the timer device is in a certain sequence is effective. *, ".. · -. 12. "Plant according to iknspruch 11, characterized in that each adjustable timer, with a separate counter is provided that a large number of beats of the same intensity allows which by each of the counting units can be determined before the sequence or series arrangement selects a different timer. ' 13 · System according to claim 12, characterized in that a stopping device for interruption ⁼ the. Plant by hand at any time is provided. * " 1 ^ «Plant according to claim 13» characterized »that various selectable stopping facilities are provided do the automatic stopping of a sequence at a predetermined rate. Time to allow and a facility for that Restart of the episode is planned. 0 98 197 08 7 4