US2430377A - Punch press actuated staking apparatus - Google Patents

Description

"F. w. VORREYER PUNCH PRESS ACTUATED STAKING APPARATUS Nov. 4, 1947.

. Filed June 17, 1943 4 Sheets-Sheet 1 A TTORA/EY .Nov. 4, 1947. F. w. VORREYER ,4

PUNCH PRESS ACTUATED STAKING APPARATUS I 5 4 Sheets-Sheet 2 Filed June 17, 1943 Nov. 4, 1947.

F. W. VORREYER PUNGH PRESS ACTUATED' STAKING APPARATUS Filed Jun 17, 1943 4 Sheets-Sheet 5 Mama":

ATTORl/[Y Nov. 4, 1947. F. w. VORREYER PUNCH PRESS ACTUATED STAKI NG APPARATUS Filed Jime 17, 1945 4 Sheets-Shet 4 Patented Nov. 4, 1947 PUNCH PRESS ACTUATED STAKING APPARATUS Frederick W. Vorreyer, Downers Grove, 111., assignor to Western Electric Company, :Incorporated, New York, N. Y., a corporation of 'New York Application June 17, 1943, Serial No. 491,127

2 Claims.

This invention relates to article assembling apparatus and more particularly to a punch press actuated staking apparatus for staking together the'parts of a vacuum tube plate assembly.

In the manufacture of vacuum tube plates, which are substantially oval in configuration, and have outstanding flanges along their flattened edges, it has been the practice to use regular staking tools in staking the two halves of the plate together. The usual form of staking tool is provided with two opposite cutting edges and two opposite relatively dull edges which cause a curling over of the stock to effect a crimping of the parts together. In the use of these tools, undesirable projecting fins are formed which interfere with the operation of the tube unless they are fiat and when the large and irregularly shaped fins heretofore made are flattened, there is a tendency for them to break off, resulting in a high rate of defective assemblies.

It is an object of the invention to provide a simple apparatus for staking parts together rapidly.

In accordance with one embodiment of the invention, a plate slidable on the bed of the punch press is provided with opposed clamping blocks for clamping two halves of a vacuum tube plate assembly together while the plate is out from under the ram of the punch press and the plate is slidable so that it may be slid under the ram of the punch press which carries a series of cams for tightly clamping the two halves of the vacuum tube plate together and other cams for actuating staking and crimping tools in automatic succession on the downward stroke of the punch press ram. A trip lock is provided which securely locks the slidable plate in proper position beneath the head of the ram until the ram completes its downstroke, whereupon the trip lock is automatically released by a plunger carried by the ram.

A better understanding of the invention may be had by reference to the following detailed description when considered in conjunction with the accompanying drawings, wherein Fig. 1 is a plan view of the bed of the punch press having fixtures and tools mounted thereon accordance with the present invention;

.Fig.2is:a'view in perspective of a vacuum tube 2 plate assembled in the apparatus shown in Fig. 1;

Fig. 3 is a plan sectional view showing the clamping mechanism 'in place under the ram of the punch -press and showing the cams on the ram of the punch press in section;

Fig. 4 is an enlarged fragmentary detail view showing the staking tool in position after staking the two halves of thevacuum tube plate together and showing the crimping tool in its retracted position;

Fig. 5 is an enlarged end View of the staking tool;

Fig. 6 is an enlarged fragmentary detail sectional view "showing the crimping tool in place after crimping the parts together and the staking tool "in its retracted position;

Fig. 7 is a transverse vertical sectional view taken substantially along the line l 'l of Fig. 3 in the direction of the arrowsshowing the punch press ram and the cams carried thereby in detail;

Figs. 8 and 9 fare vertical sectional views taken substantially along the lines '8--8 and 9--9 of Fig. 7-in -the direction ofthe arrows showing some details of the clamp for holding the two parts of the vacuum tube plate and showing one of the cams in detail; and

"Figs. 10 and 1 1 are enlarged fragmentary sec tional views taken substantially along the line 'lB'|B of Fig. 3 in the direction of the arrows showing the trip lock mechanism in its unlocked and locked positions, respectively.

Referring to the drawings, wherein like reference characters designate the same parts throughout the several views, a vacuum tube plate is shown assembled in Fig. 2. -As clearly illustrated in this figure, the plate comprises two similarly shaped halves 12 and l3, each of which is provided w'ithtwo flanges, the half [-2 being provided with flanges M and 15 and the half is being provided with flanges t6 and I1. These flanges are placed'in abutting relation and are to be attached one to another, as-shown at l8|-8, by a staking operation.

The mechanism for making the assembly shown in Fig. 2 comprises a punch press platen l9 and a punch press ram 20. The ram 20 has suitably secured to it a head plate 2| (Fig. 7) and of the vacuum tube plate.

plate 22 (Figs. 1 and 3). As shown in Figs. 1 and 3, the bed plate 22 is provided with ways 23 and 29, in which a clamp supporting plate 25 may be slid from the position shown in Fig. 1, where it is out from under the head plate 2| of the punch press, to the position shown in Fig. 3, where the clamp supporting plate will be under the head plate 2|. The clamp supporting plate 25 is provided with a pair of handles 26 and 21, whereby it may be slid from the position shown in Fig. 1 to the position shown in Fig. 3 and vice versa. Suitably fixed to the upper surface of the clamp supporting plate 25 are a pair of guide members 28 and 29 (Figs. 1, 3 and 8) which cooperate with the upper surface of the plate 25 to provide ways in which clamping blocks 30 and 3| are slidably mounted. The clamping blocks 39 and 3| are provided with grooves 32' and 33 for receiving the two halves l2 and I3 Positioned in the cavity formed by the grooves 32 and 33 is a central locating block 34, which is fixed to the plate 25 and serves to aid in locating the two halves i2 and E3 of the plate assembly between the clamping blocks. The clamping blocks 38 and BI are normally urged apart by a pair of compression springs 35 and 36 seated in pockets 3'! and 38 and 39 and 49, respectively, in the opposed faces of the blocks 39 and 3|. The outward movement of the clamping blocks 39 and 3| is limited by a pair of stop pins 59 and which extend upwardly from the clamp supporting plate 25 and prevent the clamping blocks 30 and 3| from moving beyond the position shown in Fig. 1.

The block 39 is provided with six guide holes 52, in which are slidably mounted six staking pins 53. The staking pins 53 are all looked into a block 54 and the block 54 is slidable in a cut-out 55 formed in the clamping block 3|, whereby, when the block 59 is shifted to the right, as viewed in Figs. 1 and 3 and 7, all of the pins 53 will be shifted with it. Encircling each of the pins 53 is a spring 55 seated in a socket 51, one of which is provided for each of the pins 53. In this manner, all of the pins and the block 54 are urged to the position shown in Fig. 1, where the block 55 will be prevented from moving farther to the left by a machine screw 58 threaded into the clamping block 39 and nesting in the block 54. The block 54 is provided with a shouldered aperture 59, which receives the machine screw 58.

The clamping block 3| is of a construction similar to that of the clamping block 39, except that the clamping block 3| supports a plurality of crimping tools 80 fixed to a block 6| and normally urged to the right by compression springs 62. The block 5| is prevented from moving to the right beyond the position shown in Fig. 1 by a machine screw 83, similar to the machine screw 58. The crimping tools 59 are all of exactly the same configuration and are provided with a projecting end portion 64, which enters the aperture formed by the staking pins and which is encircled by an annular shoulder 65. The method of staking and crimping and the tools 53 and 69 are described in detail and claimed in the co-pending application of E. Sirp, filed June 1'7, 1943, Serial No. 491,128, and it is only necessary here to state that the annular area defined by the end portion 64 and annular shoulder 55 of the crimping tool 90 engages the bent-over flaps formed by the staking tool 53 and crimps them into place in the operation of the present apparatus, as will be described more in detail hereinafter.

Attached to the head plate 2| of the punch press are a pair of cam members 15 and 16 (Figs. 3 and 7 which, when the ram 20 of the punch press is driven downwardly, will slide along the retainer blocks 1''! and 18 and will engage a pair of cross heads 19 and 89, respectively, to move the cross heads toward the center of the apparatus. The cross heads 19 and 89 carry actuator pins 8|-8| and 8282 rigidly attached to them. The actuator pins 8| and 82 are adapted to engage the clamping blocks 3| and 30 when the cross heads 19 and 89 are shifted toward the center of the apparatus by the camming members 75 and i6 and in this manner, the two halves I2 and I3 of the vacuum tube plate will be clamped into position between the clamping blocks 38 and 3 I. Just prior to the operation of the cross heads 79 and 89 under the influence of the cam members 1'5 and 16, the two halves I2 and I3 of the vacuum tube plate will be pushed firmly against the clamp supporting plate 25 by a spring-pressed plunger 83, the shank 84 of which extends through the head plate 2| of the punch press and is encircled by a compression spring 85, which normally urges the plunger 83 downwardly. Thus, by means of the plunger 83 and the clamping blocks 39 and 3|, both actuated by the punch press ram through the head plate 2|, the two halves l2 and I3 of the vacuum tube plate will be clamped in position to be staked together.

Mounted on the underside of the head plate 2| is a hinge block 90, in which a pivot pin 9| is mounted (Figs. 7 and 9). The pivot pin 9| pivotally supports a camming member 92, which is normally urged to assume the position shown in full lines in Fig, 9 by a leaf spring 89 attached to the hinge block 90 and bearing against a face of the camming member 92. When the head plate 2| of the punch press is moved downwardly, the camming member 92 will engage a cam surface 93 formed on an actuator block 94, which is slidable with respect to the actuator pins 82 and which is normally urged to the left (Figs. 1 and 3) by contractile springs 9595 to the position shown in Fig. 1, where its left edge will abut a stop pin 96. The actuator block 94 serves as an abutment for compression springs 9'|9'| seated in sockets 9898 formed in the cross head 80. The springs 91-91 urge the cross head 89 to engage a stop pin 99 fixed on the bed plate 22 of the press. The actuator block 94 carries a pair of actuator pins IOU-490, which are adapted to engage and actuate the block 54 when the camming member 92 engages the camming surface 93 and actuates the actuator block 94. When this action occurs, the staking pins 53 will be driven through the abutting surfaces of the flanges l4, I5 and I8 to pierce and bend them, as shown most clearly in Figs. 4 and 6. After the piercing of the flanges I i, l5, l6 and I! is completed, the camming member 92 will strike a cam block |9| (Fig. 9) to rock the camming member 92 against the action of the spring 89 and thereby move the camming member 92 to the position shown in dot and dash lines in Fig. 9, where a cut-out I92 formed therein will register with the camming surface 93, thus permitting the springs 95 to move the actuator block 94 back to the position shown in Fig. 1, to thereby withdraw the staking pins 53 from the holes which they have formed in the flanges l4 and I1.

As soon as the camming member 92 is cammed out of engagement with the surface 93, cam I05, suitably attached to the undersurface of the head plate 2|, will engage a camming surface I06 on an actuator block I01 similar to the actuator block 94. The actuator block I01 carries actuator pins I 8-I08 (Figs. 1, 3 and '7), which will engage the block GI and, through the block 6|, impart movement to the crimping tools 60. The actuator block I0! is normally urged to'the right (Figs. 1 and 3) by contractile springs I09,-=I-09 to a position where it will engage a stop pin I I0. The actuator block I01 also serves as an abutment for springs III, which normally urge the cross head 19 to engage a stop pin I I2 and in this feature the actuator block I0'I serves a purpose similar to that served by the actuator block 94. The actuator blocks 94 and I0! are slidable on the surface of the plate 22, being held in alignment thereon by guide members II3--II3 and II4I I4, respectively. When the slidable clamp supporting plate 25 is moved to position under the head plate 2|, as shown in Fig. 3, the plate 25 will be locked in that position until the very end of the downstroke of the ram 20 and will then be unlocked by a release pin I2I fixed to the underside of the head plate 2|. The release pin I2I is positioned to engage a latch member I22 toward the end of the downstroke of the ram 20 to unlock the clamp supportin plate 25 after all of the staking and crimping operations have been completed. The latch member I22 is seated in a tapered aperture I23 formed in a bracket I24 and is normally urged upwardly by a compression spring I25 to the position shown in Fig. 11. The compression spring I25 is seated in a pocket I26 and engages the latching member I22 ecoentrically so that when the release pin I2I pushes the latch member I22 downwardly against the action of the spring I25, the latch member I2I will tilt and will catch under the shoulder I21 of a bracket I28 mounted on the rear end of the clamp supporting plate 25. The bracket I28, as seen most clearly in Fig. 3, has a cam surface I29 formed on it, which, when the plate 25 is slid to the position shown in Fig. 3, will engage the latch member I22 and cam it aside to permit it to engage a surface I30 of the shoulder I21, thus to lock the clamp supporting plate '25 in its rearmost position until the release pin I2I engages the latch member I22 and resets the latch member I22 to the position shown in Fig. 10. As shown in Fig. 10, the latch member has its upper surface engaging the lower surface of the shoulder I21 and is held in that position by the spring I25 until the plate 25 is moved forwardto disengage the latch member from the bracket I28, at which time the latch member will snap back to the position shown in Fig. 11.

A better understanding of the invention may be had by reference to the following brief description of the mode of operation thereof.

With the slidable plate 25 in the position shown in Fig. 1, the two halves I2 and I3 of the vacuum tube plate assembly may be placed between the clamping blocks 30 and 3| and the plate 25 may be slid to the position shown in Fig. 3 by means of the handles 26 and 21. After the plate 25 has been slid to the position shown in Fig. 3, the ram of the punch press 20 may be driven through one stroke by mechanism (not shown) to completely attach the two halves I2 and I3 together by staking them, as shown at I8. As the ram 20 moves downwardly, the head plate 2 I carrying the various cams will, in automatic succession, clamp the halves I2 and I3, pierce the flanges of the halves with the staking pins 53, and then crimp the overturned edges of thesperforations by means of the crimping tools 60.

This --succession of operations is initiated when the cam members I5 and I6 force the cross heads 19 and toward the center of the apparatus. As the cross heads 79 and 80 move toward the center of the apparatus, they will move the actuator pins BI and 82 into engagement with the blocks 30 and 3|, thereby to compress the springs 35 and 36 and clamp the two halves I2 and I3 tightly together. As soon as the halves of the assembly are in clamped together position, the camming member 92 will become effective to move the actuator block 94 to the left '(Figs. 1 and 7). The actuator block 94 will move the pins I00 against the block 54 to which the staking pins 53 are attached and, accordingly, the pins 53 will be driven through the abutting flanges of the two halves I2 and I3. As soon as the pins 53 have pierced the flanges I4, I5, I6 and H, the camming member 92 will be rocked against the action of the spring 89 due to its engagement with the cam block IM and the springs 95 will draw the actuator block 94 to the left (Figs. 1 and 7) thereby to permit the springs 56 to withdraw the staking pins 53 from the perforations which they have formed. Just as soon as the pins 53 are withdrawn from the perforations formed in the flanges I4 to IT, cam I05 will engage cam surface I06 on the actuator block I01 to move the actuator pins I08 into engagement with the block BI, thereby to force the crimping tools 60 into engagement with the bent-over edges of the material forced out of the flanges I4 to H. As soon as this operation is completed, the stroke of the ram 20 will have been completed and the ram '20 will then move upwardly to permit the slidable plate 25 to be moved back to the position shown in Fig. 1. As the head plate 2| moves downwardly, the release pin I2I, toward the end of the stroke of the ram 20, engages the latch member I22 to rock it in the tapered aperture I23 until the latch member I2I catches under the shoulder I21 of the bracket I28. This will release the plate 25 so that it may be drawn back to the position shown in Fig. 1, where the assembled vacuum tube plate may be removed from it and two new halves I2 and I3 inserted in place thereof to be assembled.

What is claimed is:

1. An assembling apparatus comprising a press having a bed and a ram, cam members carried by the ram, a clamp and tool supporting plate slidably mounted on the bed of the press, a series of cam slides operated by the cams and movable at right angles to the direction of movement of the slidable plate, and means mounted on the plate for movement by the cam slides for clamping parts together, perforating the parts and clinching the parts in automatic succession, one of said cam members being pivotally mounted on the ram of the press to actuate one of the cam slides, and a cam mounted on the bed of the press to disengage said pivoted cam member from its associated cam slide after a predetermined amount of movement of the ram.

2. An assembling apparatus having a bed and a, reciprocatory ram, a cam member hinged to the ram, a tool having means for assembling a plurality of parts and having a cam surface positioned to be engaged and actuated by the cam member upon reciprocation of the ram, said tool moving transversely with respect to the ram, a relatively stationary cam supported by the bed and having a, cammin surface extending substantially transversely with respect to the first mentioned cam surface for moving the cam mem- UNITED STATES PATENTS ber on its hinged connection at a predetermined point in the reciprocation of the ram to disen- Number Name Date 7 gage thehinged cam member from the tool and 1,025,016 Parfitt Apr. 30, 1912 thereby render the cam member inoperative to 5 ,4 Thomas Dec. 29, 1914 actuate the tool, and means normally tendin to 7 Booth June 24, 1930 return the cam member to operative -position 1,919,999 Barton July 25, 1933 FRE I VQRREYER 2,259,576 Maclmllin Oct. 21, 1941 REFERENCES CITED 10 The following references are of record in the file of this patent:

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