US274322A - Punch-grinding machine - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

W. L. HAYES.

PUNCH GRINDING MAGHINE.

No. 274,322. y Patented Max 1220, 1883.

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(No Model.) 2 Sheets-Shet 2. W. L. HAYES PUNCH GRINDING MACHINE.

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"UNITED STATES i PATENT OFFICE.

WILLIAM L. HAYES, OF CLEVELAND, OHIO.

PUNCH-GRINDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 274,322, dated March 20, 1883.

Application filed January 8,1883. (No model.)

.To all whom it may concern Be it known that I, WILLIAM L. HAYES, a citizen of the United States, residing at Cleveland, county of (Juyahoga, State of Ohio, have invented or discovered a new and useful Improvement in Punch-Grinding Machines; and I do hereby declare the following to be a full, clear, concise, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which-like letters indicating like parts- Figure 1, Sheet 1, is a top plan view of my improved punch-grinding machine. Fig. 2 is a vertical sectional view, partly in elevation, the plane of section being taken in the plane of the line 00 .r, Fig. 1. Fig. 3, Sheet 2, is a vertical sectional view taken in the plane of the .line y y, Fig. 1; and Fig. 4 is a similar view taken in the plane of the line a a, Fig. 1.

In the preparation of die-plates for wiredrawing it is customary to make use of punches which are carefully ground with a long and gradually-tapering point, with which the die- 3o justable mechanism for holding and rotating the punch to be ground, thereby dispensing with the hand skill heretofore required, and

also'securin g more uniform and perfect work.

In generalterms my invention may be stated to consist of certain combinations of a rotary chuck for holding a punch adjustable in angle and position with relation to the periphery of the stone, and also movable across the grinding-face of the stone, with gear mechanism for giving rotary motion to the chuck, and adjustable or sliding framesupports for effecting the desired adjustments, as hereinafter more fully described and claimed.

In the drawings I have illustrated a rotary grindstone by a small segment, A, which is mounted in the usual way upon a frame or support, a portion of which is shown at A.

The punch P is held in a chuck, (J, which may be of any suitable or wellknown construction, adapted to grasp and hold the punch in line with its axis. Extending downward from the'chuck is a shaft or arbor, G, having a coni" cal enlargement, c, tapering downward toward the-shoulder e on box.e.

| the reduced central bearin g, b. Upon the lower end of the shaft or arbor is secured a pinion, 6, having a conical sleeve-hub, 0 which tapers toward the central bearing, 0, and forms, in effect, a part of the journal-bearin g of the arbor. These parts 0 0 c of the arbor are inclosed in an extensible bearing-box, E, which is formed in two parts, as. In the base or lower part, 6, is formed a conical box, e adapted to receive the part c of the arbor, and a straight tubular bearing, 6 for the part c of the arbor. The exterior of box 6, at its end adjacent to box 0, is turned down ,-formi-n g a sleeve projection, e, which'enters acorresponding sookene", in the end of e. The interior of the part c is bored out, forming a conical box, 6 for the othercone, c, of the arbor. The exterior of part c, at its end adjacent to e, is threaded, as at e", and a. nut, e is fitted thereon, which abuts against By turning this nut backward on thread 0 the two-part boxes 6 0 will be separated and pressed against the conesurl'aces c c to any desired extent, thereby securing a close journal-bearing adapted to exelude water and prevent end motion of the arbor. This is an importantfeature in. securing protection from rust and the desired uniformity of bearing of the punch upon the periphery of the stone. If desired, however, the adjacent faces of sleeve 6 and socket 6 may he threaded, as in Fig. 4, and screwed together, thereby providing for adjusting the parts of the box upon the bearing of the arbor, and in such case the nut 0 may be used as a jamnut to lock the parts of the box in the desired adjustment.

From either side ofthe arbonbearing E two arms, E, extend in opposite directions to and are connected with boxes or collars E which encircle a shaft, B, which latter is mounted and driven with rotary motion, as" presently described. The pivot'connection made with shaft B by the boxes E permits movement of.

. ment is determined it may be maintained by on the bed-plate N by passing its ends t" into toward and from the stone. This movement is bythe bevel-pinion b gearing with a similar bevel-wheel secured on the end of box-sleeve B, which latter surrounds shaft B within the box E Driving-connection is made between the sleeve and shaft by feather and groove, the latter being made in the shaft, as represented at b Thepinion Z) is held in position to mesh with gear 11 between the box E on its back face and a box, d, which encircles the shaft between the front face of such pinion and the opposite box or collar, E". From the box d a web or plate, d, extends laterally to an enlarged block, D, which is formed with transverse mortise or groove d through it or in its under face, which fits and slides upon the transverse bar or plate 13 of the part I of the frame.

In the rear of block D is pivoted a drum, D by pin (1 Within this drum is a clock-spring, D secured at its inner end to pin d and at its outer end to the shell of the drum, as illustrated in Fig. 2,'whereby the spring is operative in turning the drum on its pivot, and thereby pressing the punch upon the periphery of the stone, as presently'described. From the surface of drum D an arm, D, is extended upward, and makes adjustable connection with the raised side plate, (1 by screw (1 and curved slot 01 Between the free end ofarm D and the box E is a connecting-rod, H, having pivoted end attachments, as at h, and being formed in two parts, h h, which are connected by a couplingnut, h The purpose of this connection between the chuck-box and the adjustable arm D is to provide for setting the chuck and punch at any desired angle of elevation within the range required in use. When'this adjustbinding the arm D to the slotted plate d by set-screw 01 or, if preferred, the set-screw may be loosened and the spring D be permitted to communicate its pressure to the punch and stone through the connections described; or the desired inclination of the punch may be secured approximately by the adjustmentprovided for the arm D, and final accuracy of inclination be secured by lengthening the connecting-rod H by turning the coupling-nut h. Inorder to effect the transverse movement of the punch across the face of the stone before referred to, the block D may be pushed along the bar or plate 12, thereby moving the drum and arm D D, the box at, gear I), and boxes or collars E with the devices connected therewith. This movement may be given by the hand of the attendant or by mechanism, as may be preferred.

The shaft B, which imparts rotary motion to the punch, as before described, is mounted by journal-bearings 11 at or near its ends, upon the plate I. This plate is adj ustably mounted slots a, formed in the raised side pieces, N, thus permitting movement of plate 1 upon plate N imparted by a threaded rod, m, which screws one end into a nut, m, secured to plate I, and passes at its outer end through an upright plate or flange, n, raised on the outer edge of bed-plate N. A hand-wheel, m and collar m plate I diverge from the transverse bar i,and,-

passing to either side of the line of shaft B, encircle shaft R by boxes i These box-bearin gs of plate I on shaft B serve as guides to direct the movement of the plate, and prevent endwise displacement with relation to bedplate N. On the end of shaft B, between these arms i is secured'a bevel-gear, b, by sleevebox B This pinion b intermeshes with a similar gear, 0, on shaft R, which latter is held by sleeve-box B between the box '5 at its back and the gear b in front. As the plate I, with shaft B, is moved by screw m, the gear 1" will slide along shaft R, its sleeve and the shaft being connected so as to transmit rotary motion by feather and groove W. The shaft Bis driven by bevel-gears 1' the latter being carried on the inner end of a sleeve-box, S, which is journaled in box-bearing S secured on the bed N.

Through the axis of sleeve S is passed a tubular shaft, S, the two having feather-andgroove connection, as at s. The inner end of this shaft is journaled in pillow-block S and is prevented from being withdrawn in one direction by collar or flange .9. Through the axis of the shaft is passed a spindle, W, having an enlarged head, in, on its inner end, pointed at its extremity, which enters a chamber, 8 in the end of shaft S. A spring, w, is seated around the spindle, between the head and shoulder s, the pressure of which is opposed by a screw-stop, L, secured by nut L in the upright n By turning this screw-stop the spindle may be moved longitudinally within the shaft, the screw forcing it in one direction and the spring in the other direction.

- Upon the outer end of sleeve S is a conefaced disk, S, the inclined face 5 of which is adapted in size and form to enter and take frictional bearing upon the periphery of a correspondingly-shaped recess, a, made in the adjacent side face of pulley U. This pulley is mounted idle on the end of shaft S. A cap, U, is screwed on the end of the hub to of the pulley, within which is inclosed a disk-head, w

-' removably secured on the end of the spindle.

As the spindle is moved by spring 20 or by screw L, such movement will be communicated to the pulley by the pressure of head 10 thus causing it to make frictional engagement with disk S,or to run idle, as maybe desired. By adjusting the stop L this frictional contact may be set with reference to running the apparatus as against any desired degree of -resistance within the ordinary requirements of use, whereby. the apparatus may be put into and out of driving-gear, or may be set at proper tension for driving the mechanism with such power only as will permit the attendant to stop itwith his hand for changing punches, 860.,

causing the pulley U to turn on the disk S at any desired distance from the periphery of the stone, and it maybe bound in such position by set-screws or in any other convenient way. i

In operation the plate N is set upon and .secured to the frame at the desired point with reference, to the size of stone and length of punch to be ground. This setting may, however, be only an approximation to the desired adjustment, and may be determined with reference to grinding punches differing somewhat in size and length, and in such case the final adjustment toward and from the stoneis made by moving plate I upon plate N, as before described. By means of these adjustments, and that provided for varying the angle of elevation, before described, the punch may be ground practically with any desired bevel or inclination. The uniform rotary motion imparted, as described,to the punch,will,in connection with the rotation of the stone, secure a practically round point, and a much better one than is ordinarily secured by hand-grinding. The provision made for moving the punch transversely across the face of the stone will prepunch may be pressed upon the stone while grinding either by the spring D or by hand,

bearing upon the chuck-boxE'. The springis preferred for this purpose, however, as much more uniform pressure can be secured by it than by hand. The frictional-clutch device shown and described is not claimed herein, as it will be included in the subject-matter of a separate application for patent.

I claim herein as my invention- I 1. The combination of chuck'O, shaft B, box E, havingpivot connection with the shaft, gears I) b, and power mechanism for giving the shaft rotary motion, substantially as set forth. v

2. A chuck, 0, having an arbor with conical journal-bearings c c thereon, in combination with a divided journal-box, e 0, having inclined bearing-surfaces e e therein, and nut e substantially as and for the purposes set forth.

3. The arbor (3, havin g journal bearing formed of plain and conical parts 0 c, in combination with two-part box 0 e, the former, 6, having sleeve-extension e, and the latter having threaded socketextension e and nut 6 substantially as set forth.

4. In a holding mechanism for grinding punches, the combination of a rotary powershaft, a holding-chuck mounted in a journalbearing having pivotedsnpport on the shaft,

The plate N may thus he set;

The

and gear mechanism for imparting rotary motion'from the shaft to the chuck, substantially as set forth.

5. The combination of rotary power-shaftB, rotary chuck O,'j0urnal-box E, having pivotsupport on the shaft, gears 11 Z and adjusting mechanism for setting and supporting box E and chuck O at the desired angle of elevation, substantially as set forth.

6. The combination of rotary chuck G,journal-box E having a pivotal support, connecting-rodH, pivoted. arm D, and binding or clamping mechanismfor securin g the arm as against movement on its pivot, substantially as set forth.

7. The combination of rotary chuck O,journal-box E, having pivotal support, two-part being connected with the shaft by feather and groove, substantially as set forth.

9. The-combination of shaft B, chuck G, journal-box E, having a sliding pivotal support on the shaft, gears 12 b, bar a", sliding block D, having box 11, connected therewith, which encircles the shaftbetween gear 11 and the journalbox support, arm I), pivoted to block D, connecting-rod H, slotted plate (1 and bindingscrew (1 substantially as set forth.

10. The combination of bed-plate N, ad-

justable plate or frame I, adjusting-screw m, rotary power-shaft B, chuck C, and gears b b, connecting-rod H, pivotedarm D, and clockspring D substantially asset forth. 11. The combination of plate I, rotary shaft B, chuck 0, gears b b, and journal-box E, such box having pivotal support on the shaft, which is free to be moved in both rotary and longitudinal directions, substantially as set forth.

.12. The combination of bed-plate N, adjustable plate 1, screw-rod m, shaft B,journalbox E, having pivotal support on the shaft,

chuck G, and gears b b, substantially as set forth.

my hand. i

' Witnesses: WILLIAM L. HAYES.

Gr. D. DEAN,

I. H. NASON.

13. The combination of bed-plate N, sliding.

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