JPS63140730A - Press die with transfer feeding mechanism - Google Patents

Abstract

PURPOSE:To enable even whatever working of a work with one press die and to improve the yield of a material as well by equipping a transfer mechanism inside one press die in the press die having a transfer feeding mechanism. CONSTITUTION:A metal plate blank is punched in a square blank at a 1st station with moving it in the work feeding direction and formed in a cup shape by subjecting it to a drawing at a 2nd station. A step part is formed on the side wall of the cap at a 3rd station and the side wall base part is restruck as well, and a hole is made at the apex part of the cap at a 4th station. A flange is then formed at the lower part extending over the whole periphery of the hole at a 5th station, and after forming a projecting part in all directions by notching a flange at a 6th station, the projecting piece in a product shape is formed by cutting the outer peripheral part of the projecting part at a 7th station and finally the tip part of the projecting piece is bent to the lower part at a 8th station.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a press die equipped with a transfer feed mechanism.

"Problems to be Solved by the Prior Art and the Invention" Processes that increase productivity in press processing include progressive processing (progressive feed processing) and transfer processing.

In progressive machining, the workpieces machined at each station of one progressive mold are connected by a feed bar to be sent to the next station. Therefore, the feed height of each station must be the same.

In addition, since the workpieces processed at each station must be connected by a feed bar, material cannot be freely removed from the workpieces, resulting in a low yield of hoop material.

On the other hand, in transfer processing, multiple press dies are arranged in the feeding direction using a dedicated press machine, and clamping (grasping the workpiece) from the side to the center and ＼ from the side to the feeding direction of the workpiece, and from the end of the clamp to the feeding direction. Advance (forward), unclamp outward/＼ from advance end (work not gripped)
, an exaggerated workpiece conveyance device is provided in which four strokes in the shape of a rectangular frame, from the end of unclamping to the reverse feed direction, are carried out during one downward and upward stroke of the press machine. This transfer processing is not subject to processing limitations and can process complex products, and there is no need to make the feed height of each press die the same, but it requires an exaggerated workpiece conveyance device and each process. A press mold is required.

Therefore, the present invention aims to improve the material yield by providing a transfer mechanism within each press mold, thereby making it possible to process any workpiece with one press mold. It is.

[Means to be Solved by the Invention] The present invention overcomes the above-mentioned circumstances and attempts to provide a transfer mechanism in each of the press molds, in which a transfer mechanism is provided on the substrate of the lower mold in the feeding direction. A feed plate is arranged so as to be slidable, a clamp plate which is slidable in a direction orthogonal to the feed direction and is biased from the side toward the center is placed on the feed plate, and a clamp plate is placed on the holder plate of the upper die. A cam plate with a cam groove carved thereon is suspended, a guide pin protruding from the feed plate plate is fitted into the cam groove, and a driving cam suspended from the holder plate is brought into contact with a driven pin protruding from the crank plate. This is what I did.

"Function" When the upper mold of the press mold starts to descend from the top dead center, the feed plate advances in the feed direction, and when it descends further, the clamp plate moves from the center on the feed plate while the feed plate is stopped. The feed plate moves outward to unclamp the workpiece, and from the end of the unclamp, the feed plate returns in the reverse feed direction and reaches the bottom dead center.As it rises from the bottom dead center, the feed plate continues to return, and from the return end. The clamp plate moves toward the center and continues to clamp the workpiece, and the feed plate advances from the end of the clamp until it reaches the top dead center.

"Example" An example of a press mold equipped with a transfer mechanism for processing a product cap in the process shown in FIG. 1 will be described.

This cap supplies a square crank to the first station, squeezes it at the second station, forms a step on the side wall and restrikes the base of the side wall at the third station, and drills a hole in the top wall at the fourth station. , a fifth station forms a flange downwardly around the entire circumference of the hole, and a sixth station forms a flange downwardly over the entire circumference of the hole.
At the station, the flange is cut out to form protrusions on four sides, at the seventh station, the outer periphery of the protrusion is canted off to form a product-shaped protrusion, and at the eighth station, the tip of the protrusion is bent downward. .

A press mold equipped with a transfer mechanism for processing a product cap consists of a lower mold 1 and an upper mold 2, as shown in FIGS. 2 to 4. The direction from left to right in FIG. 3 is the workpiece feeding direction, and the direction from the side to the center in FIGS. 2 and 4 is the direction perpendicular to the workpiece feeding direction.

A guide 14 fixed to the lower surface of a feed plate 13 is fitted onto a rail 12 protruding from a base plate 11 of a lower mold 1, so that the feed plate 13 is slidably provided in the workpiece feeding direction.

A rail 15 is fixed on the feed plate 13 in a direction perpendicular to the direction in which the workpiece is fed, and a guide guide 17 fixed to the lower surface of the clamp plate 16 is fitted to move the clamp plate 16 in a direction perpendicular to the direction in which the workpiece is fed. The support pin 18 and the clamp plate 1 are slidably provided and are erected toward the inner side of the upper surface of the feed plate 13 as shown in FIG.
6. A tension spring 20 is tensioned between a support pin 19 hanging toward the outside of the lower surface, and urges the clamp plate 16 from the side toward the center. A stopper 21 is provided on the outer side of the lower surface of the clamp plate 16, and a stop piece 22 is protruded on the inner side of the upper surface of the feed plate 14.
60 stroke st is restricted. The distance between the stopper 21 and the stop piece 22 is the stroke st of the clamp plate 16. Fingers 23 for gripping a workpiece are provided protruding from the inner edge of the clamp plate 16.

A cam plate 33 with an annular cam groove 32 carved therein for controlling four strokes of clamp, advance, unclamp, and return is suspended from the holder plate 31 of the upper die 2 at a -stroke interval P in the feeding direction. Although the cam plate 33 is shown as a separate body from the holder plate 31, it is free to form them as an integral body. The guide pin 34 protruding from the feed plate 13 is fitted into the cam groove 32. A roller 35 is interposed at the front end of the guide pin 34. A reverse direction regulating device 41 is provided on the cam plate 33 to guide the guide pin 34 in the four forward directions of clamp, advance, unclamp, and return. The reverse direction regulating device 41 has two supporting shafts 42 protruding above and below the central portion inside the cam groove 32 of the cam plate 33, and the regulating plate 43 protruding from the supporting shaft 42 faces the cam groove 32. Support pieces 44 are provided diagonally below and above the upper and lower support shafts 42, and the support pieces 44 and 44 are provided so as to be rotatable.
A spring 45 is stretched between the upper and lower protruding grooves 47 and 44, and when the guide pin 34 passes through the upper and lower parts of the cam groove 32, the upper protruding grooves 47 and \
It is advanced against the biased regulation plate 43 that blocks the path, and the regulation plate 43 rotates to stop the stop step 48 recessed in the cam plate 33.
The regulating plate 43 stops when it collides with , and the regulating plate 43 returns to its original position due to the biasing force of the spring 45. In this way, although passage of the guide pin 34 is allowed, entry in the opposite direction is restricted.

A driving cam 53 having a slope 51 and an outer hanging surface 52 hanging from the holder plate 31 is clamped to a passive pin 61 provided on the clamp plate 16, and the driving cam 53 is clamped to the slope 51 when unclamping, and the outer hanging surface 52 when moving forward or returning.
Set it so that it comes into contact with.

Next, the operation of this press die will be described.

As shown in FIG. 5, at the top dead center, the guide pin 34 is fitted into the lower protruding groove 47 of the cam groove 32, and the relationship between the driven pin 61 and the drive cam 53 is as shown in FIG. ``Top'' is the position of the driven pin 61 at the top dead center, indicating that it is in the ``top'' position in the feed cycle diagram shown in FIG. Therefore, when the upper die 2 starts to descend from the top dead center, the guide pin 34 is guided by the oblique groove 71 of the cam groove 32 and reaches point A.

The driven pin 61 contacts the lower end of the slope 51 of the drive cam 53 as shown in FIG. That is, the guide pin 34 is aligned with the diagonal groove 7.
1, the feed plate 13 is moved in the feed direction, and the clamp plate 16 has its stopper 22 abutting against the stop piece 22 and the finger 23 located at the innermost position, and reaches point A in FIG. This is the advanced termination. Next, the guide pin 34 moves up the vertical groove 72 from point A of the cam groove 32 to point B, the driven pin 61 moves up on the slope 51 and reaches point B, the feed plate 13 stops, and the clamp plate 16 moves to the center. It moves further to the side and reaches point B in FIG. 7, which is the end of unclamping. Furthermore, as the upper mold 2 continues to descend, the guide pin 34 moves up the oblique groove 73 from point B of the cam groove 32 to the upper protruding groove 46, and the driven pin 61 comes into contact with the outer hanging surface 52 of the drive cam 53. It is located at the "lower" point, the feed plate moves in the reverse direction, and the clamp plate 16 does not move, reaching the "lower" point in FIG. 7, which is the return stroke. When the upper die 2 rises from the bottom dead center, the guide pin 34 moves down the oblique groove 74 from the upper protruding groove 46 of the cam groove 32 and reaches the zero point, and the driven pin 61 is guided by the outer hanging surface 52 of the drive cam 53. reaches the 0 point, the feed plate 13 returns further, the clamp plate 16 does not move,
It becomes a return stroke and reaches the 0 point in FIG. 7, which is the end of the return. Further, when the upper mold 2 rises, the guide pin 34 is guided by the vertical groove 75 and reaches point D, the driven pin 61 is guided by the slope 52 and reaches point D, the feed plate 13 does not move, and the clamp plate 16 moves from the side to the center,
This is the clamp stroke shown in FIG. Further, when the upper mold 2 rises, the guide pin 34 is guided from point D to the oblique groove 76 and reaches the lower protruding groove 47, the driven pin 61 moves to a position "above" point D, and the feed plate 13 moves. However, the clamp plate 16 does not move, resulting in the advance stroke shown in FIG.

"Effects of the Invention" As described above, the present invention is made up of a feed plate, a clamp plate, a cam plate, a guide pin, a drive cam, and a driven pin, and a transfer mechanism is provided in - press molds. Unlike conventional progressive molds, there is no need to connect workpieces with feed bars, making it possible to press workpieces with complex shapes. Since the press mold is provided with a transfer mechanism, the feed heights of each station can be made different instead of being the same.

Furthermore, since no feed bar is provided, the material yield is improved. Furthermore, the way the cam grooves are set allows smooth operation of the feed plate and clamp plate.

[Brief explanation of the drawing]

The drawings show a specific embodiment of the present invention; Fig. 1 is a perspective view showing a workpiece in the order of manufacturing steps for a product cap, and Fig. 2 is a press die at the bottom dead center in a direction perpendicular to the feeding direction of the workpiece. Figure 3 is a cross-sectional view along the ■-■ arrow in Figure 1, and Figure 4 is a vertical cross-section of the press die at the bottom dead center in the direction perpendicular to the workpiece feed direction, similar to Figure 2. 5 is a front view showing the relationship between the guide pin and the cam groove, FIG. 6 is a front view showing the relationship between the driven pin and the drive cam, and FIG. 7 is a finger feed cycle diagram. 1... Lower mold 11... Substrate 13... Feed plate 16... Clamp plate 2... Upper mold 21... Holder plate 32... Cam Clear 33... Cam plate 34...Guide pin 41...Reverse direction regulating device 51...Slope 52...Outside hanging surface

Claims (1)

[Claims] (1) A feed plate is placed on the base plate of the lower die so as to be slidable in the feed direction, and a clamp that is slidable on the feed plate in a direction orthogonal to the feed direction and is biased from the side toward the center. Plates are arranged, and a cam plate with an annular cam groove engraved thereon that controls the four strokes of clamp, advance, unclamp, and return at one-stroke intervals in the feed direction is suspended from the feed plate. A reverse direction regulating device is provided on the cam plate to insert the protruding guide pin into the cam groove and guide the guide pin in the forward direction of four strokes: clamp, advance, unclamp, and return. A press mold equipped with a transfer feed mechanism in which a drive cam having an outer hanging surface is clamped to a passive pin protruding from the clamp plate and abuts on the slope when unclamping, and on the outer hanging surface during advance and return.