JPS6218246B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a press molding method and a press mold thereof, and particularly to a method for preventing a drawn product from being stuck during palletizing.

(Prior Art) Generally, when drawn products such as automobile spare tire pans are stacked for palletization, there is a problem that they fit into each other, making it difficult to take them out one by one during the next processing step. Therefore, in the past, a spacer ring was inserted into the drawn part of each drawn product to stack the drawn products in a floating state to prevent them from getting stuck during palletizing.

(Problems to be Solved by the Invention) However, this conventional method requires a ring to prevent palletizing and also requires a process of inserting and removing the ring. There was a problem that the number of man-hours for molding processing increased and work efficiency decreased.

The present invention has been made in view of these points, and even if drawn products are stacked one after another in the same direction and palletized, they can be easily stacked without fitting into each other without requiring the insertion of rings as in the past. It is an object of the present invention to provide a press molding method and a press mold thereof that can be stacked so that they can be taken out.

(Means for solving the problem) Therefore, in the present invention, after press forming, a workpiece cut into a predetermined shape to be made into a molded product is subjected to drawing forming, and after this drawing forming or subsequent processing, the workpiece is sequentially drawn in the same direction. This is for molded products that are loaded on the machine, and during the drawing process or subsequent processing of the workpiece, protrusions are press-formed on the workpiece to prevent palletization at different positions for the front and rear molded products. It shall be. As a result, when molded workpieces are sequentially stacked in the same direction and palletized, the workpieces do not fit into each other due to the protrusions formed at different positions on the front and rear molded products, and can be easily taken out in the next process. be able to.

Further, as a press mold for carrying out the above press forming method, a press mold for use in drawing process or subsequent processing, which is equipped with a work receiving die and a work holding punch, and A rotary table provided on either the receiving die or the work holding punch, a protrusion provided on the rotary table eccentrically with respect to its center of rotation, and a recess or recess for the protrusion provided on the other side without the rotary table. It is provided with a ring-shaped groove and a driving means for moving the rotary table in pitch for each press process. As a result, protrusions for preventing palletizing fitting are formed on each workpiece at different positions for the front and rear molded products.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows a press mold A for trimming used in the method of the present invention, the press mold A is placed after the drawing process, and the work piece w after the drawing process is
On the other hand, in conjunction with the press operation, for example, three protrusions w ₂ , w ₂ , w ₂ for preventing palletization are attached to the squeezed portion w ₁ of the work w at different positions for the front and rear molded products.
It is press-molded.

That is, the press mold A for trimming is as follows:
A workpiece receiving die 1 and a presser punch 2, each having a shape that matches the workpiece w after drawing processing, are arranged vertically facing each other, and constitute a lower mold and an upper mold. The die 1 and the punch 2 are respectively provided with a lower blade 3 and an upper blade 4 for trimming, facing each other. In addition, as shown in FIG.
The fifth rotating shaft is rotatably supported by the die 1 via a vertical rotating shaft 6, and a plurality of (three in the figure) are mounted on the rotating table 5 eccentrically from the center of rotation. protrusions 7, 7, 7 are provided.

On the other hand, a bar 8 is fixed to the upper mold in a hanging manner so as to move up and down together with the upper mold, and a roller 9 is attached to the tip (lower end) of the bar 8. As shown in FIG. 3, a cam pulley 10 is provided on the lower mold opposite to the lower side of the roller 9, and is slidably supported in the horizontal direction by a guide 11 provided on the lower mold. , the cam plate 10 has a cam groove 10a that opens upward and slopes diagonally downward from the opening.
is formed to be able to engage with the roller 9. As the bar 8 descends, the roller 9 descends from its ascending end position as indicated by the broken line arrow in FIG. As a result, the roller 9 presses and slides against the lower edge of the cam groove 10a, thereby horizontally moving the cam plate 10 to the right as shown by the broken line arrow in FIG. When the roller 9 rises from its lowering end position as shown by the solid line arrow in Figure 3, the roller 9 presses and slides against the upper edge of the cam groove 10a, moving the cam plate 10 horizontally to the left as shown by the solid line arrow in Figure 3. The cam plate 10 is configured to reciprocate in the horizontal direction as the bar 8 moves up and down and the roller 9 goes up and down. Further, a first rack 12 is formed at the lower end of the cam plate 10, and a first pinion 13 fixed to a support shaft 14 meshes with the first rack 12, and the support shaft 14 is provided on the lower mold. It is rotatably supported by bearing members 15, 15. Further, as shown in FIG. 4, a second pinion 16 is fixed to the support shaft 14, while a second pinion 16 is supported on the lower mold so as to be slidable in the horizontal direction by a guide 17 provided on the lower mold. Slide member 1
A second rack 19 is provided at the lower end of the slide member 18 and engages with the second pinion 16.
is formed. A ratchet wheel 21, which is integrally fixed to the lower part of the rotary table 5, is rotatably fitted to the rotary shaft 6, while a ratchet wheel 21, whose tip is engaged with the ratchet wheel 21, is mounted on the slide member 18. A movable ratchet 20 is rotatably supported on a shaft, and is biased by a spring 22 to a protruding position where its tip abuts against a stopper portion 18a on the slide member 18 so as to engage with a ratchet wheel 21. . As a result, the horizontal reciprocation of the cam plate 10 caused by the vertical movement of the bar 8 causes the first pinion 13 and the second pinion 16 coaxial therewith to rotate forward and backward through the engagement between the first rack 12 and the first pinion 13. This rotation causes the slide member 18 and the ratchet 20 thereon to reciprocate in the horizontal direction through the engagement between the second pinion 16 and the second rack 19. When moving in the direction of the broken line arrow in Figure 4, the latch 20 resists the biasing force of the spring 22 and escapes in the non-engaging direction, and during the return movement (when moving in the direction of the solid line arrow in Figure 4), the latch 20 engages with the ratchet wheel 21,
The ratchet wheel 21 and the turntable 5 integrated therewith are rotated by a predetermined angle in the counterclockwise direction in FIG. A driving means 23 is configured to rotate the rotor in a pitch-by-pitch manner.

Further, a ring-shaped groove 24 or a recess is formed in the head of the work holding punch 2 in correspondence with the protrusions 7, 7, 7 of the rotary table 5, and as a result, the rotary table is Move 5 in a pinch,
Protrusions w ₂ , w 2 , _{w 2 are} provided on the drawing part w ₁ of the workpiece w to prevent the front and rear molded products from being palletized in different positions.
is configured to form a Note that 25 is a blank holder.

Next, to explain the operation of the trimming press die A, when the upper die moves downward in order to trim the workpiece w that has been cut into a predetermined shape to be a molded product and has been subjected to drawing processing, The bar 8 is lowered, and the cam plate 10 is moved to the right in FIG. The first pinion 1 that meshes
3 in the clockwise direction as shown in Fig. 3. The clockwise rotation of the first pinion 13 causes the second pinion 16 to rotate in the same direction, and as a result, the slide member 18 having the second rack 19 that meshes with the second pinion 16 moves in the same direction as the cam plate 10 ( Third
(to the right in the figure), and at the same time move to Rachiet 20.
moves in the anti-engagement direction. Then, at the lowermost position of the upper mold, the workpiece w is trimmed by the upper blade 4 and the lower blade 3, and at the same time, the protrusion 7 on the rotary table 5,
7 and 7 press-form the protrusions w ₂ , w ₂ , w ₂ for preventing palletizing fit into the constricted portion w ₁ of the work w, and at this position the ratchet 20 engages with the ratchet wheel 21.

Next, after the trimming process, when the upper die moves upward and the bar 8 rises, the cam plate 10
moves to the left in Figure 3 after having a certain amount of play. This leftward movement of the cam plate 10 causes the slide member 18 and the ratchet 20 to move to the left in the same manner as described above, and accordingly, the ratchet wheel 21 that engages with the ratchet 20 and the rotary base 5 are moved in pitch. , move the protrusions 7, 7, 7 on the rotary table 5 by approximately half the pitch between the protrusions 7, 7, and change the position from the position shown by the solid line in FIG. 2 to the position shown by the imaginary line. .

In this state, when the next workpiece w is trimmed in the same way as above, in conjunction with this press operation, the drawn part _w1 of the workpiece w is different from the previous workpiece w. At the positions corresponding to the projections 7, 7, 7 shown by the imaginary lines in _FIG .
w ₂ and w ₂ are formed. Thereafter, in the same manner, protrusions w ₂ , w ₂ , w ₂ for preventing palletizing fitting are formed in different positions of the front and rear molded products on the drawn part w ₁ of the workpiece w, so that they fit into each other during palletizing. It can be stacked without any problems.

In addition, in the above explanation, the trimming press mold A
Although the case has been described above, it goes without saying that the present invention can also be applied to drawing molds and other various press molds used after the drawing process.

Further, in the above embodiment, the rotary table 5 is moved by the driving means 2.
3, it is arranged to rotate in one direction in pitches, but it is also possible to make it move in reciprocating pitches, and the same effect as described above can be achieved. Also,
Various other means can be used as this driving means.

Furthermore, in the above embodiment, the bottom of the workpiece receiving die 1 is constituted by the rotary table 5, while the head of the work holding punch 2 is provided with a recess or a ring-shaped groove 24 corresponding to the projections 7, 7, 7 on the rotary table 5. However, on the contrary,
It goes without saying that the head of the work holding punch may be constructed of a rotary table, while the bottom of the work receiving die may be provided with a recess or a ring-shaped groove.

(Effects of the Invention) As explained above, according to the press forming method of the present invention, it is possible to prevent the front and rear molded products from being palletized in different positions on the workpiece during drawing or subsequent processing. Since the protrusions are press-formed, when drawn products are stacked one after another in the same direction and palletized, there is no need to insert a ring like in the past, and there is no need for stacking work. They can be stacked without fitting into each other, and can be easily taken out in the next process.This reduces the number of press forming processes and improves work efficiency, especially for draw-formed products, and also improves palletization and removal. It is possible to automate the process.

Further, the press mold of the present invention is a press mold for use in drawing processing or subsequent processing, which is equipped with a work receiving die and a work holding punch, and includes a work receiving die or a work holding punch. One side is composed of a rotary table, and the rotary table is provided with a protrusion eccentric to its center of rotation, and a drive means for pitch-rotating the rotary table, while the other side, which does not have the rotary table, is provided with a recess or a recess for the protrusion. A ring-shaped groove is formed, and the rotary table is moved in pitch every time the press is pressed, so that protrusions for preventing palletization are formed at different positions on the front and rear molded parts of the workpiece, making it easy to use. Even with such a structure, the above-mentioned protrusions for preventing palletizing fitting can be automatically formed.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the invention.
The figure is a longitudinal sectional view of the trimming press mold, FIG. 2 is a plan view of the workpiece receiving die shown in FIG. 1, FIG. 3 is a sectional view taken along the line - in FIG. - is an enlarged sectional view taken along the line. A...press mold for trimming, 1...work receiving die, 2...work holding punch, 5...turntable, 7...
Protrusion, 23... Drive means, 24... Ring-shaped groove, w...
Workpiece, w ₁ ...drawing part, w ₂ ...protrusion.

Claims (1)

[Scope of Claims] 1. A workpiece that is cut into a predetermined shape to be a molded product after press forming is subjected to drawing forming, and the molded product is sequentially stacked in the same direction after this drawing or subsequent processing, A press forming method, which comprises press-forming protrusions for preventing palletization fitting into different positions of the front and rear molded products on the work during drawing or subsequent processing of the work. 2. In a press mold for use in drawing processing or subsequent processing, which is equipped with a workpiece receiving die and a workpiece holding punch, a rotary table provided on either the workpiece receiving die or the workpiece holding punch; A protrusion provided on the rotary table eccentrically with respect to its rotation center, a recess or ring-shaped groove for the protrusion provided on the other side of the rotary table, and a driving means for moving the rotary table in pitch for each press process. What is claimed is: 1. A press mold, comprising: a press mold having a structure in which protrusions for preventing palletization are formed in different positions of the front and rear molded products on the workpiece.