JPH0211926Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an apparatus for embossing a semi-finished product being pressed in a transfer press apparatus that continuously presses a strip-shaped material.

Conventional technology Conventional transfer press machines form embossing at one location in one process, so in order to form multiple embossings around the circumference of a cylindrical part, it is necessary to use processing equipment for each location at one time. It was something that was processed one by one. For this reason, for example, three steps of press working are required to process three locations around the circumference.

Problems that the invention aims to solve: For this reason, it takes a long time to process around the circumference, and the difficulty of positioning between each embossing process leads to poor productivity and variations due to machine condition. If this happens, there is a high probability that the product quality will be uneven. In addition, since the number of processing steps increases, it is necessary to use many processing stations for press processing, which may result in restrictions on other processing.
Detection also had to be done carefully.

Embodiment A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal cross-sectional view of the embossing device according to the present invention, which is the - cross section of FIG.
The figure is a plan view of the main part of the present invention, and Figure 3 is the same as Figure 2.
The sectional view, FIG. 6, is a partially enlarged view of FIG. 1.
The embossing device according to the present invention is used in a transfer press, and each station of the transfer press sequentially processes the strip material. For example, in the previous step, a hole is formed in the center of the upper part of the cylindrical cup body shown in FIG. Semi-finished product W with open convex parts
1, a product W3 having an embossment W2 formed around the cylindrical circumference shown in FIG. 5 is produced.

The fingers 10 of the transfer press move on the upper surface of the slide plate 12 while holding the semi-finished product W1 between them. Then, by the action of a known positioning device (not shown), the semi-finished product W1 is transferred to a fixed position and stopped.
A plurality of knockouts 14 are located below the semi-finished product W1 in this fixed position, and the knockouts 1
4 is always urged upward by the force of a spring 16 and is set in an upper position by a stopper (not shown), and this position is maintained such that the tip end surface of the knockout 14 is flush with the upper surface of the slide plate 12.
Furthermore, this knockout 14 is movable up and down within the holding block 34 and the base 32 by the action of a cam (not shown), and by descending, it is possible to transport the semi-finished product W1 to a product receiver 30, which will be described later. Further, a punch cylinder 18 attached to a ram (not shown) that moves up and down is installed above the semi-finished product W1 in a fixed position, and the punch cylinder 18 is moved up and down in a vertical hole 19 made inside the punch cylinder 18. A press punch 20 that is slidable is provided. The lower end of this punch 20 has a shape that matches the upper surface shape of the semi-finished product W1, and the lower surface has a circular flat surface 201 and the center part has a shape that matches the upper surface shape of the semi-finished product W1.
A recess 202 is provided so that the central protrusion of the two does not come into contact with each other. Further, an upper presser foot 22 is attached to the upper end of this presser punch 20, with one side touching the upper end and the other side fixed to the ram.
A spring 24 is provided in contact with the punch 20 so that the punch 20 is constantly pressed downward. Furthermore, a hook groove 26 is cut next to this press punch 20, and this hook groove 26
A fixing hole 27 provided on the side of the punch cylinder 18 facing the
The stop plate 28 fixedly held in the groove 26
is coming. Therefore, as the ram moves upward, the punch cylinder 18 moves upward so as not to interfere with the movement of the semi-finished product W1 by the finger 10, and the punch 20 moves downward by the force of the spring 24. Even if it is pushed, it will not come out of the punch cylinder 18 due to the engagement between the stop plate 28 and the hook groove 26. In addition, a sliding hole 203 is provided in the recess 20 in the vertical direction at the center of the punch 20.
A hole 204 is drilled upward from 2 and continues to a slightly larger diameter hole 204 drilled upward in the center. The support rod 29 is slidable in the vertical direction within the sliding hole 203.
is fixed to the upper presser 22. The tip of this support rod 29 forms a tapered portion 291 whose diameter is the same as that of the through hole at the center of the upper part of the semi-finished product W1.
Further, when the ram is at the bottom dead center position, the ram is attached so that its tip is located within the through hole 58 of the product receiver 30, which will be described later.

On the other hand, directly below this fixed position, a product holder 30, which will be described later and has a shape that matches the inner surface shape of the semi-finished product W1, is positioned, and this product holder 30 is fixed to the transfer press main body. It is positioned and fixed by a recess provided on the upper surface of a holding block 34 fixed on the base 32.
This holding block 34 has a disk shape with a circular outer circumferential portion 36, and a ring-shaped cam 40 having a circumferential portion 38 matching the outer circumferential portion 36 is placed over the holding block 34. This ring-shaped cam 40 has cam grooves 42 cut in the number of positions to be embossed, and slide grooves 44 are cut in the center direction of the holding block 34 at positions corresponding to the cam grooves 42. Punch 46 that can slide 44
will be installed. Then, the foot portion 461 of the punch 46 is pressed by the compression spring 50 inserted into the spring receiving hole 48 installed in the holding block 34, and the punch 46 is pressed.
6 is always urged toward the ring-shaped cam 40.
Further, the tip of this punch 46 is a protrusion 462 having the same shape as the pressing shape when embossing the semi-finished product W1. On the other hand, the protrusion 4 of this punch 46
The embossing die 52, which is paired with the embossing die 62, is installed in a receiving groove 56 provided in a product receiving base 54, which is fixedly held in the upper surface recess 35 of the holding block 34. This product receiving base 54 has an outer shape matching the inner surface shape of the semi-finished product W1 and has a through hole 58 in the center, and the receiving groove 56 is cut toward the through hole 58 from the outer periphery. Note that the tip of the embossing die 52 facing the protrusion 462 of the punch 46 is a recess 521 that matches the shape of the protrusion 462. Furthermore, embossing die 5
2, a foot portion 522 is provided, and the foot portion 522 can be engaged with a stepped portion 57 provided further below the receiving groove 56 installed in the product receiving base 54. Further, a notch 523 is provided diagonally above the rear of the embossing die 52. A plate cover 60 is fixed above the product receiving base 54 to form the structure of the product receiving base 30. Also, the holding block 3 below the through hole 58
4 is bored with a through hole 62 and a hole 64 with a larger diameter following the through hole 62. A spring receiving hole 66 is also provided in the base 32 at a position corresponding to this hole 64. It has a body part 681 that is approximately the same diameter as the through hole 62 and smaller in diameter than the diameter of the support rod 29, and the lower end thereof is located inside the hole 64 and has a stopper part 682 that has a larger diameter. The rod 68 is the through hole 62
installed so that it can slide up and down. Furthermore, the stop bar 68
A compression spring 70 is inserted between the retaining portion 682 of the spring receiving hole 66 and the bottom of the spring receiving hole 66, and the force of this spring always urges the retaining rod 68 upward. Once it moves until it touches the top, it will not move any further. The length of the body portion 681 must be such that it protrudes slightly above the position of the foot portion 522 of the embossing die 52 when the stop bar 68 moves upwardly. Furthermore, a notch 41 is cut on the outer periphery of the ring-shaped cam 40, and a circular joint 72 having a protruding end 721 that engages with this notch 41 is fixed to the outer periphery of the ring-shaped cam 40. Inside the base 32 adjacent to the circular joint 72 is a sliding hole 74 and a spring receiving hole 76 with a larger diameter.
will be provided. It has a body part 781 that has approximately the same diameter as this sliding hole 74, and a head part 781 that has a larger diameter than the body part 781.
A press punch 78 having a diameter of 82 is provided so as to be able to reciprocate back and forth through the sliding hole 74, and its head 782 is positioned within the spring receiving hole 76. A pressing spring 82 is inserted between this head 782 and a screw cap 80 screwed to the entrance of the spring receiving hole 76, and since the pressing punch 78 is always pressed in the direction of the circular joint 72, its tip Part 7
83 always contacts and presses one end of the circular joint 72. Further, at the other end of the circular joint 72 is located a push plate 86 attached to a drive plate 84 that is reciprocated by a drive device (not shown). Therefore, the circular joint 72 is always pressed by the press punch 78 so as to come into contact with the side surface 861 of the push plate 86, and therefore, the ring-shaped cam 40 rotates back and forth due to the reciprocating movement of the drive plate 84.

The embossing apparatus of the present invention having the above structure embosses the semi-finished product W1 in the following order.
First, the semi-finished product W1 shown in FIG. 4 is clamped and held by the fingers 10 of the transfer press and is conveyed on the slide plate 12 to a position above the product receiver 30 of the apparatus of the present invention. Subsequently, as the ram (not shown) descends, the upper and lower holes 19 in the punch cylinder 18 attached to the ram are first slid up and down on the upper surface of the semi-finished product W1, and the upper and lower holes 19 are opened by the pushing force of the spring 24. The lower end of the press 20 at the lower end position of the press 19 comes into contact with the lower end of the press 20, and the press 20 continues to descend until the semi-finished product W1 is placed on the product receiver 30 by further lowering of the ram. At this time, the knockout 14, whose tip is in contact with the lower end of the semi-finished product W1, also lowers until the semi-finished product W1 covers the product receiver 30 while compressing the spring 16 as the semi-finished product W1 descends. After this, even if the ram further descends, the spring 24 contracts and the punch 20 simply slides upward in the upper and lower holes 19. Further, as the ram descends, the support rod 29 attached to the upper presser 22 fixed to the ram also descends, and passes through the hole at the center of the upper part of the semi-finished product W1, and from the receiving groove 56 of the product receiver 30 to the through hole 58. Therefore, the body part 681 is passed through the through hole 58, and the stop bar 68, whose tip reaches the receiving groove 56, abuts its tip against the tip of the support rod 29, and is then pushed downward while resisting the compression spring 70. . For this reason, since there is a stop bar 68 in the receiving groove 56, the embossing die 5
2 was pushed outward, and the tip tapered part 291 of the support rod 29 and the embossing die 52
Since the support rod 29 is inserted using the notch 523 as a guide, the embossing die 52 is further pushed outward. The tip of the support rod 29 reaches from the receiving groove 56 into the through hole 58 and receives a force during embossing, which will be described later. When this embossing die 52 is pushed outward, the outer tip is in a position that matches the inner shape surface of the semi-finished product W1 (the outer shape of the product receiving base 54), and the recess 521 of the embossing die 52
This is the position where the protrusion 462 of the punch 46 faces each other. After this, the second
A push plate 86 attached to a drive plate 84 that is moved downward (reciprocating) in the figure pushes the push spring 8 through a circular joint 72.
2, the ring-shaped cam 40 fixing the circular joint 72 is rotated (counterclockwise) around the outer periphery 36 of the holding block 34. Therefore, the outer end of the punch 46, whose outer end was fitted into the valley of the cam groove 42, is pushed by the action of the inclined surface of the cam groove 42, and while resisting the compression spring 50, the punch 46 moves into the slide groove 44 provided in the holding block 34. is slid inward along the Then, the protrusion 462 of the punch 46 is pushed toward the recess 521 of the embossing die 52, and embossing is performed around the cylindrical circumference of the semi-finished product W1. At this time, the embossing die 52 is pressed by the punch 46.
Even if it is pushed inward, the rear end is supported by the support rod 29, and the left and right and bottom parts are supported by the product receiving base 5.
4. Since the upper part is held by the plate cover 60,
The embossing die 52 does not move at all. At this time, since the tip of the support rod 29 has descended into the through hole 58, the punch 4 is used for embossing.
6 to the embossing die 52. After this embossing process, the drive plate 84 is moved upward in FIG.
In order to push the circular joint 72 toward the pusher plate 86 attached to the drive plate 84, the ring-shaped cam 40 rotates around the outer periphery 36 of the retaining block 34 in the opposite direction (clockwise). Therefore, the punch 46 is pushed by the compression spring 50 and its outer end is guided along the cam groove 42 to the valley, and moves in the slide groove 44 provided in the holding block 34 in the opposite direction to the above.
Therefore, the protrusion 462 of the punch 46 separates from the recess of the embossing W2 processed on the semi-finished product W1, and
3 will not become an obstacle when being discharged upward. On the other hand, inside the product W3, the following operations occur. As the ram continues to operate as described above, the support rod 29 fixed to the upper presser foot 22 rises.
The stop rod 68, which has been pushed downward by the tip of the support rod 29, is raised by the force of the compression spring 70 until the stopper 682 comes into contact with the upper part of the hole 64. This is the position where the tip of the body portion 681 of the stop rod 68 faces into the receiving groove 56. Here, since the diameter of the body 681 of the stop rod 68 is smaller than the diameter of the support rod 29, the embossing die 52 can be moved backward along the slide groove 44. As the ram rises, the stop plate 28, which is fixedly held on the punch tube 18 attached to the ram, is constantly pushed downward in the upper and lower holes 19 by the force of the spring 24, so that the flat surface 201 of the product W3 is (contacting the top surface) is cut into a hook groove 2
When the punch 20 moves within the punch cylinder 6 and engages with its upper end, the punch 20 rises together with the punch cylinder 18. At the same time as the push punch 20 rises, the knockout 14 that was in contact with the lower end of the product W3 similarly begins to rise by the force of a cam (not shown), and while holding the product W3 vertically, the product receiver 30
Then move the finger 10 to the holding position. At this time, as the emboss W2 of the product W3 rises, the embossing die 52 is pushed back due to its close contact with the recess 521 of the embossing die 52 at the upper oblique portion of the embossed periphery as a boundary. However, even if it retreats, since the stop rod 68 is located at the rear, the product W3 is only moved back to the extent that it does not interfere with the product W3 being discharged from the product receiver 30. This also prevents the support rod 29 and the embossing die 52 from coming into contact with each other and causing scratches when the support rod 29 is lowered during the next embossing process. The support rod 29 is made to descend smoothly from the receiving groove 56 to the through hole 58 between the holes. Thereafter, as the ram rises further, the support rod 29, the punch tube 18, and the pusher 20 move upward so as not to obstruct the movement of the fingers 10 that clamp the product W3 and the semi-finished product W1 to be processed next. raises its tip until it is flush with the top surface of the slide plate 12 and then stops. At this time, the finger 10 to be transported to the next process is first transferred to the semi-finished product W1.
Since the product W3 is waiting in the same position where it was conveyed while holding it between the fingers, the product W3 is transferred to the finger 10 of the next process.
It will be held in place again. Next, product W
3 is conveyed by fingers 10 to a processing position next to the transfer press, where the next processing is performed.
Furthermore, at this time, finger 10 explained at the beginning
Then, the next semi-finished product W1 is transported to a position above the product receiver 30 and the next embossing process is repeated in the above-described process.

Effects of the invention As detailed above, the present invention allows multiple embossing processes to be performed simultaneously in one process when performing embossing on semi-finished products. The number of tightening steps can be reduced. Therefore, many other processing steps can be taken to complete the product. Furthermore, since multiple embossing processes are not performed in multiple steps, the difficulty of positioning, which was conventionally performed, is eliminated, and the quality of the product can be improved.

[Brief explanation of the drawing]

1 is a vertical sectional view of the embossing device according to the present invention, and FIG. 2 is a plan view of the main part of the present invention, and FIG.
The figure is a perspective view of the semi-finished product before embossing.
FIG. 5 is a diagram showing a product to which embossing has been applied, and FIG. 6 is a partially enlarged view of FIG. 1. 10...finger, 14...knock out,
18...Punch cylinder, 20...Press punch, 29...Support rod, 30...Product receiver, 40...Ring-shaped cam, 4
6...Punch, 52...Emboss die, 58...
Through hole, 68... stop bar, 84... drive plate, W1...
...Semi-finished product, W2...embossed, W3...product.

Claims (1)

[Scope of utility model registration request] This is a device that embosses multiple locations around the circumference of a workpiece with a hole in the center of the top of a cylindrical cup body in one motion of the transfer press. A support rod, a punch tube fixed to the ram, a presser punch that can slide vertically inside the punch tube, and an upper presser fixed to the ram and the presserle are provided to urge the presser downward. A spring is provided between the punch cylinder and the press punch to prevent the press punch from coming off, and a product receiver is installed below the slide plate on which the workpiece is moved to be sent by the fingers, and a product receiver is installed to receive the workpiece. The product holder includes a product holder base that positions and holds the workpiece, an embossing die that can move a receiving groove inside the product holder base toward the center, and a through hole through which a support rod can pass, and a holding block that fixes the product holder. is fixed to the base,
Furthermore, a ring-shaped cam rotatably placed around the holding block, a punch that can slide toward the center within the holding block, and a punch provided between the holding block and the punch so that the punch is always placed on the outer ring-shaped cam side. A compression spring is provided to press the punch, and the embossing die is opposed to the punch that is pushed inward by the rotation of the cam.The punch is also urged upward within the holding block by the compression spring to move its tip from the through hole to the receiving groove. It consists of a support rod and a stop rod that is coaxial and has a slightly smaller diameter.When moving the punch toward the embossing die by rotating the ring-shaped cam, the support rod is positioned at the rear end of the embossing die. This embossing process is characterized by embossing around the circumference of the workpiece while keeping it stationary, and after embossing, replacing the support rod with a stop rod so that the embossing die can be retracted and ejecting the product from the product receiver. Device.