US3772905A - Bending machine for bars, wires and sections - Google Patents

Bending machine for bars, wires and sections Download PDF

Info

Publication number
US3772905A
US3772905A US00148748A US3772905DA US3772905A US 3772905 A US3772905 A US 3772905A US 00148748 A US00148748 A US 00148748A US 3772905D A US3772905D A US 3772905DA US 3772905 A US3772905 A US 3772905A
Authority
US
United States
Prior art keywords
bending
circuit
circuits
programme
bending angle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00148748A
Other languages
English (en)
Inventor
C Peddinghaus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3772905A publication Critical patent/US3772905A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
    • B21D11/12—Bending specially adapted to produce specific articles, e.g. leaf springs the articles being reinforcements for concrete
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/12—Bending rods, profiles, or tubes with programme control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S72/00—Metal deforming
    • Y10S72/702—Overbending to compensate for springback

Definitions

  • the invention relates to a bending machine for bars, wires and sections of steel and similar materials, the machine having a bending plate carrying bending tools and capable of being driven for rotation in either angular direction and a signal transmitter connected therewith for various main bending angles which are to be carried out in any desired sequence.
  • Such a bending machine has been proposed particularly as a machine for bending steel reinforcement rods for concrete.
  • the direction control reverses the drive of the bending plate so that this runs back to its zero position in which the bar being bent can be advanced so as to have the next bending in its new position.
  • the advantage of this arises from the fact that each individual bending angle can be preset in a programme store in which the number of storage locations can be large. This number corresponds to the largest possible number of individual bendings that a bar can have.
  • the programme store must thus be correspoindingly sufficiently large as regards its storage locations.
  • a bending machine for bars, wires and sections of steel and similar materials including a bending plate, a drive, a control circuit for the drive, bending angle circuits corresponding to the main bending angles, a programme store circuit with a number of storage locations exceeding the number of the main bending angles, said bending angle circuits each being connectable at choice in the programme store circuit, said programme store circuit switching progressively at each switching step by one storage location and in its turn can be switched over to the control circuit of the drive, in which position the programme store circuit switches progressively after each bending likewise by one storage location.
  • the separation of the bending angle circuits from the programme storage circuit makes it possible to restrict the comparatively expensive bending angle circuits to the actual number of main bending angles. This number is comparatively small.
  • main bending angles for example 45, 90 and 180 which can be applied in the right and also in the left direction will suffice. Consequently, only three bending angle circuits in each case are necessary, but the total number of bends which can be applied to a bar is considerably greater.
  • the programme storage circuit is then designed for the greatest possible number of individual bends, that is for eight storage locations.
  • the programme store circuit is preferably a relay circuit which switches progressively over its storage locations by means of current impulses.
  • Such circuits involve comparatively little expense and also are very reliable because the individual relays are totally enclosed and therefore are only slightly liable to danger of damage due to climatic influences or to dirt.
  • the bending angle circuits access from outside must be possible. Since, however, the latter are very restricted in numbers it is possible to choose reliable constructions without increasing the total cost.
  • the bending angle circuits can be improved in their efficiency by means of auxiliary circuits as will be shown below so that in a similar manner incorrect bends depending upon the material strength and the mechanical properties of the material can be excluded.
  • connection between the bending angle circuits and the programme storage circuit is effected preferably through impulse switches. It is then not necessary to touch the setting switches of the bending angle circuits, for given material thicknesses and material strengths of the bars to be bent, after the bending angle together with any necessary corrections has once been set, since only the impulse switches require to be actuated.
  • Each of these is associated with a bending angle circuit.
  • the programme stroage circuit is free for inserting a programme, its storage locations can be associated by actuating the impulse switches, with the bending angle circuits set to the various main bending angles. Simultaneously with each operation the programme storage circuit switches on to the next following storage location in the manner described.
  • cut-out delays capable of being set for the various thicknesses and strengths of the material of the bars to be bent and preferably associated with the individual bending .angle circuits, through which the bending operation is continued further after the bending plate has reached a predetermined position when the actual bend corresponds with what was intended.
  • the bending angle circuits in their turn are preferably capable of being set to impulses which correspond to the main bending angles and by which the setting members connected with the bending plate are released.
  • a setting member rotatable with the bending plate is a cam disc provided with cam means which actuate at least one impulse giving switch which is stationary with respect to the cam disc.
  • said cam means preferably comprise as many switch cams as the number of main bending angles, the angular positions of the switch cams corresponding to the main bending angles.
  • the bending angle circuits operate simply with time controls. These time value controls are time value transmitters which can be set to the time values corresponding to the bending angles. In this case there is needed only one impulse initiated by the setting member connected with the bending plate, which determines the beginning of the timing period and preferably occurs after the bending plate or the setting member connected therewith has moved through a very small angle from its zero position.
  • FIG. 1 is a simplified circuit diagram
  • FIG. 2 is a block circuit diagram
  • FIG. 3 shows the arrangement of the operating switches of the bending angle circuits
  • FIG. 4 shows a setting member rotating with the bending plate.
  • FIG. 1 In the circuit diagram of FIG. 1 there are shown firstly two current supply conductors 38 and 39 in which a control current flows at a relatively small voltage. Further, there are three bending angle circuits. A, B and C in each of which, for the sake of clearness, only three main bending angles of 45, 90 and 180 in only one direction are provided and indicated by corresponding angle symbols. The bending angle circuits are set to these angle symbols by means of setting knobs or similar manual means. In practice, switching possibilities for the three main bending angles are provided for both right hand and left hand operation.
  • Each connection of a main bending angle of a bending angle circuit is connected through conductors 40, 41 and 42 with the corresponding connections of the other bending angle circuits, which in their turn lead to three correspondingly characterized connections of a step counter 43.
  • This step counter is arranged to be actuated by current impulses which act upon its coil 44.
  • impulses are initiated by switch earns 45, which are connected with a setting member rotating with a bending plate, through impulse switches 46.
  • a cam 45 can be provided on this setting member which rotates with the bending plate at each of three positions corresponding to the angles 45, 90 and 180.
  • time control for the bending process.
  • Such time control which is not shown in the associated diagram, is usually effected by means of RC members and has the advantage that a corresponding electric signal is obtained without mechanical switch means being necessary.
  • the step counter 43 is connected through a relay coil 47 to the current supply 38.
  • the relay coil 47 is arranged to actuate a change-over switch 48 (which is indicated only diagrammatically) by which the drive of the bending plate, which is not shown in FIG. 1, can be reversed in such a manner that the bending plate runs back from its provided bending position to its zero position and stays in this position in order then to carry out the next bending.
  • the last mentioned exciting current circuit for the reversal of the drive is completed through one of the bending angle circuits A, B or C, one of storage locations 32 to 37 of the programme storage circuit connected therewith (to be hereinafter described), a step counter 49 and a conductor 50.
  • the bending angle circuits A, B and C are respectively connected with various storage locations 32 to 37 of the programme store. For the sake of simplicity only six storage locations are shown and also for the sake of simplicity the connection of these six storage locations is only shown to the bending angle circuit A.
  • Each of the storage locations 32 to 37 has a current supply through conductors 51 and 52. Further, an essential constituent of each storage location is a holding relay indicated at 53 in the connecting conductors of the bending angle circuit A to the left hand storage location 32.
  • Each storage location 32 to 37 is further connected to the individual connections of a step counter 49,
  • impulses which are fed to its coil 54.
  • These impulses are initiated either by an impulse transmitter 55 which, for this purpose, co-operates with switch earns 56, which latter cams are preferably arranged on the setting member rotating with the bending plate in such a manner that in the zero position of the bending plate a current impulse is initiated.
  • the impulses can also be initiated by one of three scanning switches 57, 58 or 59 associated respectively with the three bending angle circuits A, B and C. These scanning switches are double switches, of which each when actuated makes a connection between the supply conductor 39 and conductor 60.
  • the conductor 60 leads to a change-over switch 61 which selectively establishes the connection between the coil 54 of the step counter 49 either with the impulse transmitter 55 or with the scanning switches 57, 58 and 59.
  • each one of the scanning switches 57, 58 or 59 when actuated establishes a connection between the supply conductor 39 and the associated bending angle circuit A, B or C belonging to it.
  • each of the bending angle circuits A, B and C is switched to one of the three main bending angles. This setting will remain unaltered.
  • the scanning switch 57 is actuated, assuming the switch 61 is set into its position shown in broken lines, there is a current flow in the connection between the beinding angle circuit A and the storage location 32 which latter is connected to the current supply 38 through the step counter 49, switch 62 (in its broken line position) and branch conductor 63.
  • the holding relay 53 then goes into the holding position and causes among other things in the circuit of the storage location 32 a further switching operation as a result of which the connection of the bending angle circuit A on the one hand and the step counter 49 on the other hand remain established When the initiating current impulse is absent. This is the case when the step counter 49 advances another step. This is effected with a delay which is necessary for reasons of switching technique, with the change-over switch 61 being still in its position shown in broken lines.
  • the changeover switch 62 which can be coupled in a suitable manner with the switch 61 is, as aforesaid, also in the position shown in broken lines.
  • the storage locations of the programme circuit can be associated in any desired manner (by actuation of the scanning switches 57, 58 or 59) with pre-set bending angle circuits, thus setting any desired programme. Since the step counter 49 advances at each switch operation, double connections are excluded.
  • the switches 61 and 62 are moved to the positions shown in full lines.
  • the circuit previously established in the storage locations 32 to 37 remain held by the corresponding relays because the storage locations have their own current supply.
  • the desired bending programme can be started which continues in such a manner that from one bend to the next, the step counter 49 is continuously advanced in order to switch in the next higher storage location.
  • the step counter 49 is again in its initial position so that the next bar can be bent.
  • a main current supply circuit 64 is fed from the current supply mains and contains in the usual manner fuses, cut-outs, transformers and rectifiers so that on the one hand a driving motor 68 of a bending machine 69 and on the other hand a control circuit 65, a bending angle circuit 66 and a programme store circuit 67 are supplied.
  • the bending angle circuit 66 by which, in the manner described above, main bending angles can be set is connected selectively either with the programme storage circuit 67 or the control circuit 65. This possibility of choice makes it possible to control the bending machine drive directly through the control circuit 65 with the programme storage circuit cut out.
  • the bending angle circuit 66 is connected with the programme storage circuit 67. This is connected with the main current supply 64 through the interposed control circuit 65 and through this effects in the manner described the switching on, reversing, and switching off of the driving motor 68 of the bending machine 69.
  • a setting member 70 rotating with the bending machine 69 has switch cams corresponding to at least one of the zero positions with which a current impulse is initiated and which is fed through conductor 71 to the control circuit 65 and causes the advancing of the step counter so that for the bending process the individual circuits stored in the storage locations 32 to 37 can be called up.
  • FIG. 3 shows the switch panel which is preferably constructed as the front plate of the housing containing the bending angle circuits. It shows the three above mentioned scanning switches 57, 58 and 59 which are associated with the three bending angle circuits A, B and C.
  • Setting hand controls 72, 73 and 74 make it possible to set the bending angle circuits A, B and C to different main bending angles.
  • setting potentiometers 75, 76 and 77 are provided of which each corresponds to a bending angle circuit and makes possible the switching in of a time period during which time the drive of the bending machine after reaching the pre-set main bending angle remains switches on until the bar to be bent has actually reached the desired angle.
  • the three setting potentiometers are capable of being set by a common potentiometer 78 to, for example, different strength properties of the material to be bent.
  • switches 61, 62 for switching over the programme storage circuit.
  • the circuits are initially programmed, while in the other switch position they are called up from the store for successive bends when a bending programme is being carried out.
  • a switch 79 serves for cutting out the set programme, which can be effected by interrupting the current supply to the storage locations. Then, the relays which were forerly in the holding position are released so that the bending angle circuits set thereby are interrupted.
  • FIG. 4 illustrates the giving of impulses by the setting member 70 which rotates with a plate 82 of the bending machine.
  • This bending machine plate 82 carries bending tools 83 and 84 and is driven by the motor 68 as described.
  • On a shaft 85 also driven by said motor 68 is a disc-shaped setting member 70 provided with a peripheral switch cam 56 which corresponds to the null position of the bending plate.
  • This switch cam actuates the impulse switch 55, the switch arm of which is acted upon by a contact spring 86 and comes to bear on a contact 87 or on a stop 88.
  • the setting member 70 may carry further switch cams 45 which each correspond to a definite angle, with only one of such earns 45 being illustrated.
  • a bending machine for bars, wires and sections of steel and similar materials including a bending plate, a drive, a control circuit for the drive, bending angle circuits corresponding to the main bending angles, a programme store circuit with a number of storage locations exceeding the number of the main bending angles, said bending angle circuits each being connectable at choice in the programme store circuit, said programme store circuit switching progressively at each switching step by one storage location and in its turn can be switched over to the control circuit of the drive, in which position the programme store circuit switches progressively after each bending likewise by one storage location.
  • the bending machine as claimed in claim 1 characterised in that the programme store circuit is a relay circuit which switches progressively over its storage 10- cations by means of current impulses.
  • the bending machine as claimed in claim 1 characterised in that the bending angle circuits are connected with the programme store circuit through impulse scanning switches.
  • the bending machine as claimed in claim 1 including a setting member rotatable with the bending plate, in that the bending angle circuits are adjustable to impulses corresponding to the main bending angles which can be initiated by said setting member.
  • the bending machine as claimed in claim including at least one impulse transmitter switch which is stationary with respect to the setting member, characterised in that said setting member is a cam disc which is rotatable with the bending plate and which has cam means arranged to actuate said at least one impulse transmitter switch.
  • cam means comprises as many switch cams as the number of the main bending angles, with the angluar positions of said switch cams corresponding to said main bending angles.
  • the bending machine as claimed in claim 1 characterised in that the bending angle circuits are constructed with cut-out delays which can be varied for different thicknesses and strengths of material.
  • the bending machine as claimed in claim 1 characterised in that the bending angle circuits are provided with timers which can be set to time values corresponding to the bending angles.
US00148748A 1970-06-01 1971-06-01 Bending machine for bars, wires and sections Expired - Lifetime US3772905A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702026639 DE2026639B2 (de) 1970-06-01 1970-06-01 Biegemaschine fuer staebe, draehte und profile

Publications (1)

Publication Number Publication Date
US3772905A true US3772905A (en) 1973-11-20

Family

ID=5772616

Family Applications (1)

Application Number Title Priority Date Filing Date
US00148748A Expired - Lifetime US3772905A (en) 1970-06-01 1971-06-01 Bending machine for bars, wires and sections

Country Status (8)

Country Link
US (1) US3772905A (de)
AT (1) AT314938B (de)
CA (1) CA949672A (de)
DE (1) DE2026639B2 (de)
FR (1) FR2104753B2 (de)
GB (1) GB1344545A (de)
IT (1) IT1048883B (de)
ZA (1) ZA713467B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3895509A (en) * 1969-12-03 1975-07-22 Peddinghaus Carl Ullrich Dr Bending machine for rods, wires and other elongated articles of steel, etc.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT345065B (de) * 1976-03-25 1978-08-25 Evg Entwicklung Verwert Ges Automatische steuereinrichtung fuer eine zur herstellung von betonbewehrungsbuegeln aus stab- oder drahtmaterial bestimmte biegemaschine
AT367322B (de) * 1980-01-16 1982-06-25 Evg Entwicklung Verwert Ges Anlage zum herstellen von buegeln verschiedener gestalt und groesse, insbesondere von betonbewehrungsbssgeln

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3299681A (en) * 1960-03-22 1967-01-24 Baldwin Lima Hamilton Corp Program controlled tube bender
GB1078753A (en) * 1963-09-28 1967-08-09 Hilgers Masch & App Bauanstalt Bending machine
US3352136A (en) * 1965-03-22 1967-11-14 Conrac Corp Metal forming machine
US3512383A (en) * 1969-04-21 1970-05-19 Digital Machines Inc Re-bar bender

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3299681A (en) * 1960-03-22 1967-01-24 Baldwin Lima Hamilton Corp Program controlled tube bender
GB1078753A (en) * 1963-09-28 1967-08-09 Hilgers Masch & App Bauanstalt Bending machine
US3352136A (en) * 1965-03-22 1967-11-14 Conrac Corp Metal forming machine
US3512383A (en) * 1969-04-21 1970-05-19 Digital Machines Inc Re-bar bender

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3895509A (en) * 1969-12-03 1975-07-22 Peddinghaus Carl Ullrich Dr Bending machine for rods, wires and other elongated articles of steel, etc.

Also Published As

Publication number Publication date
FR2104753A2 (de) 1972-04-21
CA949672A (en) 1974-06-18
ZA713467B (en) 1972-01-26
AT314938B (de) 1974-04-25
IT1048883B (it) 1980-12-20
DE2026639B2 (de) 1976-04-15
DE2026639A1 (de) 1971-12-09
GB1344545A (en) 1974-01-23
FR2104753B2 (de) 1974-08-19

Similar Documents

Publication Publication Date Title
US4294006A (en) Automatic control for wire crimping machine
DE2001664B2 (de) Anordnung zur aenderung der instruktionsfolge in einem elek tronischen digitalrechner
DE69008184D1 (de) Parametrische stromregelung für einen mikro-schritt-unipolar-motor.
US3772905A (en) Bending machine for bars, wires and sections
US3482110A (en) Device for automatically rendering apparatus inoperative when subjected to shock
US2467422A (en) Automatic radio control apparatus
US3393543A (en) Rod bending apparatus
GB2014332A (en) Positioning Machine Tools
GB1261293A (en) Improved storage rack installation
US2477953A (en) Combinator of electric circuits
US2302353A (en) Variable speed control mechanism
US2203297A (en) Control mechanism
GB1286865A (en) A bending machine
US3895509A (en) Bending machine for rods, wires and other elongated articles of steel, etc.
US3013166A (en) Programing control unit
US3717016A (en) Bending machine
US3676761A (en) Automatic tool system and method for control
US2372604A (en) Dual duplicator
JPS59198895A (ja) モ−タの時分割制御回路
US1932040A (en) Method of and apparatus for controlling electrical devices
US1459756A (en) Electrical controlling mechanism
DE1565184C (de) Automatische Einrichtung fur Elektro schlackenschweißung
US3093727A (en) Electric welding apparatus and control system
SU415852A3 (ru) Гибочная машина
DE676908C (de) Steuerschaltung fuer elektrische Schiffsantriebe mit mindestens zwei aus je einem Generator und einem Motor bestehenden Maschinensaetzen