DE2256180A1 - EQUIPMENT FOR PUNCHING ON A PRESS - Google Patents

Description

File 72-10 / 20-154 November 14, 19 72 WF / Si

Societe Anonyme Automobiles Citroen, P 75 Paris, 117 a 167, Quai Andre Citroen

Device for punching that can be mounted on a press.

The present invention relates to a press Mountable device for punching holes in tubular workpieces.

According to the invention, this device has an underframe which can be mounted under the punch of the press and on which a table is rotatably arranged in the expanding mandrels are mounted, which are rotatable about vertical axes, all of the have the same distance from the axis of rotation of the table and are arranged at the same angular distance from one another. There are also devices for rotating the table in sections by one, the angular distance between two expanding mandrels equal angle present, whereby it is achieved that each of the Expanding mandrels passes a loading position, several working positions and an unloading position. DiB establishment has continue to devices that are arranged on the underframe and serve to actuate the expanding mandrels, as are devices for placing an object to be punched on the expanding mandrel at the loading position and devices for removing the

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perforated object from the expanding mandrel at the unloading position.

These various devices are used to drive

• connected to the movement of the press in such a way that its movement coincides with the

ι Movement of the punch of the press are synchronized. she but can also be carried out by a gear motor through the! Cycle of the press controlled on-off circuit driven j will be. The device according to the invention, on the other hand, has an upper frame which can be mounted on the punch of the press and on which a series of punching devices are arranged, each of which is at one of the working positions of the rotatable Table is located.

In a preferred embodiment of the subject matter of In accordance with the invention, each of the punching devices has a carriage carrying a die and a carriage carrying a punch Car on, the two carriages are slidably arranged on a plate on the upper frame in the vertical direction is guided movably against the force of spring elements. The lower frame and the upper frame have ramps each with a ramp of the carriage carrying the dies _only moving it outwards and with a ramp, of the carriage carrying the punch to move it inward.

The device according to the invention, with which a perforation from the inside is possible, can be used anywhere where tubular objects with small dimensions and great thickness are to be punched. SjLe is particularly applicable for punching objects in the shape of a truncated ball or, more generally, of objects that have a barrel shape, such as e.g. ball bearing cages or ball joint cages.

In the following, an exemplary embodiment is given with reference to the accompanying figures explained in more detail for the device according to the invention.

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Figure 1 shows in a perspective partial view the drive of the turret table of the device.

Figure 2 shows a vertical section through part of the device.

Figure 3 is a plan view of the underframe of the device.

FIG. 4 is a section along the line IV-IV in FIG.

FIG. 5 is a section along the line V-V in FIG.

FIG. 6 is a section along the line VI-VI in FIG.

FIG. 7 is a sectional view of a detail of FIG Facility in the vicinity of the control device.

In FIGS. 8 and 9, the functioning of some parts of the device as a function of time is shown in diagrams shown.

The device shown in the figures is intended to punch slots 1 in barrel-shaped rings 2 and it is I mounted for this purpose on a classic press, which has a punch 3, which in relation to a fixed frame is movable in the vertical direction. (See Figures 4, 5 and 6)

This device has in its upper part a number of tools which are carried by an upper frame 5, the is arranged on the punch 3 and a number in its lower part mechanical devices which are arranged on a base 6 and which are used to punch the workpieces to pass these tools.

All of these mechanical devices have one Revolving table 7, which is arranged rotatably about a central cam 6a of the underframe 6, with the interposition of rollers 8. This turret table can be made in individual steps

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driven by a Maltese cross. For this purpose, its underside has radial slots 9 into which Drive rollers 10 can engage, which are arranged eccentrically on a disk Ii. The disc 11 is on one Shaft 12 attached, which is rotatably mounted in the underframe 6 and with the interposition of liner 13 and 14 with the transmission ratio 1: 1 is connected to a drive shaft 15 of the press. (Figure 6) The lower part of the table 7 also has arcuate recesses 16 into which one-

^: on the one hand a non-positive locking sector 17 connected to the disc 11 and on the other hand a sector 18 for the opposite

! lock can intervene. The sector 18 is arranged on a shaft 19 which is rotatably supported in the underframe 6 and at its lower end carries a drive wheel 20 which meshes with a wheel 21 which is on the shaft 12 is attached (Figures 5 and 6).

The table 7 rotates in this way with each revolution of the disc 11, which is effected by the shaft 15, further by an angle which corresponds to the angle which two adjacent; Barte slots 9 separates and is held between two movements by the sectors 17 and 18, which each engage in one of the recesses 16 and move in the opposite direction. In the case shown, each of the rings 2 is to be provided with six slots 1 and the table 7 moves! over a total of nine positions, namely a loading position A: a control position B, six working positions C, D ... H, and an unloading position I, the angular distance between two slots 9 being 40 ° (Figure 3).

The table 7 is provided with nine expanding mandrels 22 with a vertical axis I, which, when the table is locked, each advance ι are in one of the above positions. Each of these

SpMzdorne is floating in a bush 23 and mounted by a toroidal connection made of elastomeric material centered. (Figure 2) The socket 23 is interposed

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rotatably supported by rollers 25 in a housing 26, which in an opening of the table 7 is attached. At the lower end of the bush 23, a drive wheel 27 is attached which is in engagement stands with a planetary ring 28 which is arranged on the underframe 6. When the table 7 rotates around its axis, will the bushings 23 are set in rotation and with them the expanding mandrels 22. In the case shown, the transmission ratio between the planetary ring 28 and the drive wheel 27 the value 7.5, so that each of the sockets 23 rotates through 300 °, when the table continues to rotate by one step, i.e. by the angle 40.

Each of the expanding mandrels 22 has jaws 22a, for example

[3 pieces, which are spaced apart and are designed so that they have one of the rings 2 at its base hold on when the expanding mandrel is expanded.

In the expanding mandrel 22, an expansion cone 29 is guided displaceably in the vertical direction. A spring 30 between a shoulder of the expanding mandrel and a shoulder of the expansion cone is arranged, exerts a force on them at the bottom so that the expanding mandrel is normally in its extended position. The cone 29 carries on his Upper part lifting lugs 29a which are designed so that they can pass between the jaws 22a and onto them Way, lift off the ring 2 when the jaws are in their retracted position.

When an expanding mandrel 22 is in the loading position A, the lower part of its expansion cone 29 is opposite a rod 31, which is movable in the vertical direction and with the interposition of a spring 32 on the one Arm of a two-armed lever 33 is supported, which is rotatable about the axis and is mounted in the underframe 6. (Figure 5) The other The arm of this lever has a roller 35 which rests against a cam disk 36 which is arranged on the shaft 19.

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If an expanding mandrel is fixed in position A, the cam disk 36 causes a pivoting of the lever 33, by means of which the rod 31 is pushed back so that the expanding mandrel is

the pulls together and the lifting lugs 29a in / area above the

form jaws 22a arrive and in this way a Uriterlage / ifauf which a ring 2 to be machined is placed, as will be described below.

In an analogous manner, when an expanding mandrel 22 is in the unloading position I, the lower part of its expansion cone 29 lies opposite a vertically arranged rod 31 ', which, in a similar way to the rod 31, is supported by a cam 36' which is attached to the shaft 12 is arranged, can be moved (Figure 6). In the Zeidtiung, the connecting members between this rod and this cam bear the same reference numerals as the members provided between the rod 31 and the cam 36, with the addition of the character " ^f ".

When an expanding mandrel 22 is stationary in position I, the cam disk 36 'causes the rod 31 to be displaced upper. So that the expanding mandrel contracts and the ring releases that has been processed, and the hub lugs 29a lift this ring from the expanding mandrel.

Finally, when an expanding mandrel 22 is in a working position, the lower part of its expansion cone is located compared to a micro-interrupter 37 »the one with a device connected to interrupt the press cycle and checked for each position by an illuminated sign, whereby each micro-breaker is put into action if one of the expansion cones goes too far, causing the BtKX corresponding expanding mandrel results (Figure 2).

At the loading position A, a feed chute 40 is provided which is connected to a vibrating bowl 41 (FIGS. 3 and 5),

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This feed ring opens into a channel 42 which is located at the height of the lifting lugs 29a in its upper position and in which a carriage 43 is movably guided. This carriage 43 is subject to the action of an elastic return f device, which here has a pneumatic winch 44, which

' exerts a force on the carriage 43 which holds it in place on a stop, not shown. A roller 45 is supported on a shoulder 43a of the carriage 43 and is arranged on a connecting rod 46 which is articulated with a disk

, which is arranged on the shaft 19. With each revolution of this shaft, the roller 45 moves the carriage 43 against it

ι the action of the winch 44 so that the feed channel. 40 released will. A ring 2 then slides into the channel 42 and is immediately pushed on by the carriage 43 until this leans against the stop. In this position, the ring is on the lifting lugs 29a of the expanding mandrel, which is straight assumes the position A, while the connecting rod 46 covers the rest of its way unloaded (Figure 5).

The channel 42 is lengthened by a channel 48 which extends in the shape of a circular arc around the axis of the turret table 7

ι and the ring resting on the lifting attachments 29 leads as long as until it reaches control position B. In this

'Position is checked whether the ring is well centered and clamped in its expanding mandrel, which is done with the help of a spring-loaded Kegels happens, which is described below.

At the unloading position I there is a rotatable unloading arm 49 provided, which is arranged on the shaft 12 and is at the level of the lifting lugs 29a in their upper position (Figures 1 and 6). The machined ring that is on the hub lugs of the expanding mandrel in position I rests, is carried away in this way and falls due to its weight into a discharge channel 50.

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In the upper frame 5, a vertically movable plate 51 is arranged, which is guided on a column 52, which is fixedly arranged coaxially to the axis of the turret table 7 in the upper frame 5, and on a guide support 53 of the lower frame 6 is slidably guided. This plate 51 is subjected to the force of springs 54, which on it a Apply downward force to press it against a stop 55 (Figure 6). The punching tools are on the plate 51 (in the example shown six pieces) arranged so that each of them is at one of the ArbeitsspoÜsionen.

Each of punching tools has a carriage 56, on which a 'die 57 is fixed and a carriage 58 on which a punch' is attached 59- (Figure 2). The carriage 56 is slidably guided on radial slide guides provided in the lower surface of the plate 51, and its inner edge is designed as [

Ramp formed, which interacts with a cam 60, which is arranged in the upper surface of the guide bracket 53 j. The carriage 58 is also movable in the slide guides the plate 51 out and its outer edge 58a is designed as a ramp, which with a ramp 5a of the Upper frame 5 cooperates. A spring 61 is arranged between the two carriages 56 and 58. Behind each die 57 a channel is arranged in a vertical hole 63 of the underframe 6 so as to be slidable. A force fit with the carriage 56 connected finger engages in a radial passage opening j of the channel 62, whereby the path of the carriage 56 is limited, and j the channel was held in its position under this carriage

When the ram is in the upper position, the two carriages 56 and 58 are brought into one of each other by the springs 61 held at a remote position, as shown in the right Hallte of Figure 4. If then servant The punch 3 is moved downwards while taking the upper frame 5 with it,

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the carriage 56 carrying the die hits the cam 60 and shifts obliquely outwards, - with the die 57 rests against the ring. At this moment the plate 51 hits its stop 55, which fixes it holds, so that in the further course of the downward movement of the upper frame 5 by the interaction of the ramps 5a and 58a a radial displacement of the carriage 58 inward takes place, as shown in FIG. 2 and the left half of FIG. The perforation is carried out and the here The resulting waste falls into the channel 62.

When the punch rises again, the inverse cycle run through and the cars take their starting position again. A ring 66 is provided to absorb the return force, which is attached to the movable plate 51 and on which the rings are supported, the return of the Carriage 58 is effected by ramps 5b and 58b which run parallel to ramps 5a and 58a.

In the upper frame 5, a conical pawl 67 is guided displaceably against the action of a spring. When the top frame is in the open position, this pawl engages into one of nine grooves 68, which are provided on the periphery of the turret table 7, for precise positioning ensure the table during the punching (Figure 3).

Finally, a control cone 69 is arranged on the plate 51, which is under the action of a spring 70 and is slidably guided in a housing 71 which is attached to the Plate is attached (Figure 7). When a ring 2 is in the control position, the control cone 69 engages this ring and if this ring is not properly centered and clamped, the cone can reach its normal depth Do not reach position and press a Mikra switch (not shown).

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The operation of the device according to the invention results can be clearly seen from the preceding illustration and will be summarized below with reference to FIGS. 8 and 9. The curve 72 shows the sequence of movements of the press, the ram of which has a reciprocating motion following a sinusoidal curve Movement performs. Line 73 shows the movement of shaft 15, which is continuous.

At the beginning of a cycle, the punch 3 begins its movement in the top dead center, and the turret table 7 rotates as this is shown by line 74. When the drive roller j has left the slot 9 with which it was engaged, the locking sectors 17 and 18 fix the table, the pawl 67 engages in one of the grooves 68 and sets the Positioning accuracy sure, like this with the line

i
is shown.

ίDuring the downward movement of the punch 3, the connecting rod moves 46 the carriage 43, so that a ring in the direction of the expanding mandrel, which is in the loading position A, is displaced will. The connecting rod then continues to move empty, as described above. The movement of the car will represented by line 76.

Shortly after the table 7 has stopped, the cam disks 36 and 36 'cause the rods 31 and 31 to rise so that the expanding mandrels 22, which are in the loading position A and the unloading position I, release and the lifting lugs 29a in their reach the upper position, with the ones in the drawer-I position, pick up the ring that has been moved by the carriage. Then the rod 31 lowers and the charged ring is jammed. The movements of the expanding mandrels in the loading position and the unloading position are represented by lines 77 and 78. The strong lines represent the period in which the loosening takes place and the expansion mandrels are clamped while the

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The hatched lines indicate the period in which the expanding mandrels are resolved.

Shortly before the punch 3 reaches its bottom dead center, the carriages 56 carrying the dies begin, as with line 79 shown, and then the carriage 58 carrying the punches, as shown by line 80, their sequence of movements, which ultimately leads to the perforation of the ring. The unloading arm 59 meets the ring 2 that has been machined and is on the lifting lugs 29 of the expanding mandrel 22 located in position I, and throws it into the discharge chute 50. This Discharge is shown with line 81.

When the punch 3 is in its bottom dead center, the punching of the six rings, which are in the working positions, is finished. The ring made in the course of the previous Cycles has been processed is carried out. A new ring rests on the projections 29a of the expanding mandrel in the

Loading position and the ring that was used during the previous | Cycle was controlled by the cone 69. ·!

Then the punch 3 rises again, the carriage 56 and 58 j take their starting position again, the expanding mandrel

Unloading dissolves, the carriage 43 moves against the ^Effect of the winch 44 and the table 7 is only released from the pawl 67, then of the locking sectors 17 and 18 and starts to rotate again. When the punch reaches its top dead center again, the various individual parts have their starting positions again
is enough and are prepared for a / cycle.

Within nine cycles, a ring that was fed in during the first cycle is completely processed and removed again.

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Claims (6)

- 12 claims 1.) On a press-mountable device for punching, characterized by a rotatable table (7) which is arranged on an underframe (6) and is provided with expanding mandrels (22) as workpiece holders which can be rotated about axes which are parallel and equidistant from one another and are arranged to the axis of rotation of the table (7), devices (10, 11, 12) for rotating the table (7) in sections by an angle equal to the angular distance between two expanding mandrels (22), as well as devices (27, 28) for rotating each of the expanding mandrels (22) in synchronism with the rotational movement of the table (7), and a number of punching devices, each of which has a carriage (58) carrying the punch (59) and a carriage (56) carrying the die (57) wherein the punching devices are arranged on an upper frame (5) which can be mounted on the punch (3) of the press and each of the expanding mandrels (22) during the rotation of the table (7) at a loading position (A) several jobs tspositionen (C to H) and a Entladeposi-> tion (I) passes and equipment devices (42; to 47) for placing a workpiece (2) to be punched on the expanding mandrel (22) at the loading position (A) and devices (49, 50) for removing the perforated workpiece (2) from the expanding mandrel (22) at the unloading position (I) has, and these devices are driven so that their movements with the movement of the punch (3) of the press ^! are synchronized. 2. Device according to claim 1, characterized in that the two carriages (56, 58) of each punching device are slidably arranged on a plate (51) which is movably guided on the upper frame (5) in the vertical direction against the force of spring elements (54) is, and that the lower frame (6) and the upper frame (5) have ramps (60, 5a, 5b), each with a ramp, of the die (57) 3Ü9821 / 0836 - 13 - 2258180 , - 13 - supporting carriage (56) for moving the same outward. and cooperate with a ramp (58a, 58b) of the carriage (58) carrying the punch (59) to move the same inwardly. 3. Device according to claim 2, characterized in that each of the perforation devices is displaceable by an angle which is complementary to that. The angle of movement of the table between two positions is to achieve a perforation that is not the same. 4 »device according to one of claims 1 to 3 ,, characterized in that the expanding mandrel (22) having at its upper part a lifting device (ZB), for lifting the punching to the workpiece (2), wherein Fe.derel.em.ente ( 3Q) are provided to hold the lifting device (2S) in its low position, and that d'a-s lower section ^e steep (6> at the loading position (A) and the unloading position (I) devices (3t to 3 : 6) has, for moving the lifting device (29) upwards against: the action of the spring elements (3Q). 5. Device according to claim 4 ,, characterized gekeinzeichne1 ₁ that; at the loading position (A) it has a feed channel C40, which is connected to a container (4t> containing the payable workslefce (2-i) and a channel into which the feed channel (: 4Q) opens. un <l deJ? at the level of the hold-up position: iZSl) in the upper position, and a plunger (431, eter bar in the canal C43) is guided to the canal: Segenstande © -zij; 4er (29) wu $ V ^ rriehtungeÄ {4 ^ 4? * zur 6. Device according to claims 4 or 5, characterized in that it has at the unloading position (I) a rotatable arm (49) which is at the level of the lifting devices (29) in the upper position, for throwing one on the Lifting devices (29) arranged object in a channel (50). Blank page