JPH0155052B2 - - Google Patents

Description

Detailed Description of the Invention A. Object of the Invention (1) Industrial Field of Application The present invention relates to a method and apparatus for manufacturing a folded product, in particular a method and an apparatus for manufacturing a folded product, in particular a method and an apparatus for manufacturing a folded product, and in particular a method and an apparatus for manufacturing a folded product.
The second sheet metal workpiece each having a hanging part.
The present invention relates to a method and apparatus for obtaining a product having a hook-shaped portion by bending the lower edge of the hanging portion toward the first hanging portion.

(2) Prior art The workpiece is attached to a bending die having a hook-shaped bending blade, and the lower edge of the second hanging part protruding from the bending blade is bent into a hook shape toward the first hanging part. When bent, the hook-shaped portion will hold the bending blade, making it impossible to release the product above the bending die. Further, even if an attempt is made to move the product laterally toward the bending die to remove the hook-shaped portion from the bending blade, the first hanging portion is in contact with the bending die, so the lateral movement is impossible.

Therefore, in the past, the bending die was made thin and the first
A mold release space is provided between the hanging part and the bending die,
After processing, the product is moved laterally toward the bending die using that space to remove the hook-shaped portion from the bending blade.

(3) Problems to be Solved by the Invention However, if the bending die is made thin, the amount of holding the workpiece on the bending die will be reduced, making the fixation of the workpiece unstable, and as a result, the bending accuracy will deteriorate. There is a problem.

An object of the present invention is to provide the manufacturing method and apparatus that can solve these problems.

B. Structure of the Invention (1) Means for Solving Problems The method for manufacturing a folded product according to the present invention comprises: a fixing part having a hook-shaped bending blade corresponding to the hook-shaped part; Using a bending die equipped with a movable part that is disposed adjacent to each other and that moves up during bending and moves down during mold release, the first hanging part of the workpiece is placed on the side of the movable part, and the first 2. A bending step of placing the hanging parts on the fixed part side and attaching the workpiece to the bending die, and then forming the hook-shaped part to obtain the product; lowering the movable part; between the first hanging part and the fixing part of the product, a mold release space wider than the bending length of the hook-shaped part to allow lateral movement of the first hanging part toward the fixing part; and a mold release step of pushing the product toward the fixing part to remove the hook-shaped part from the bending blade.

Furthermore, the folded product manufacturing apparatus according to the present invention includes a folding die for attaching the workpiece, and a bending punch for forming the hook-shaped portion on the workpiece in cooperation with the die. The bending die includes a fixing part located on the second hanging part side of the workpiece and having a hook-shaped bending blade corresponding to the hook-shaped part, and a fixing part located on the first hanging part side of the workpiece and having a hook-shaped bending blade corresponding to the hook-shaped part. The movable part is arranged adjacently, and when the workpiece is bent, the movable part rises to allow the workpiece to adhere, and when the product is released from the mold, the movable part descends. A mold release space wider than the bending length of the hook-shaped portion is formed between the first hanging portion and the fixing portion of the product to allow lateral movement of the first hanging portion toward the fixing portion. The movable part is configured to be able to move up and down, and the bending die is provided with a die hole that cooperates with a piercing punch.

(2) Effect Since the movable part is raised during the bending process,
A sufficient amount of presser foot can be provided for the workpiece. In addition, after processing, the movable part descends to form a mold release space between the first hanging part of the product and the fixed part of the bending die, and this space allows the first hanging part to move laterally toward the fixed part. be done. Therefore, if the product is pushed toward the fixed part, the hook-shaped part will be removed from the bending blade.

Furthermore, since the bending die is provided with a die hole that cooperates with the piercing punch, the piercing process is performed simultaneously with the bending process.

(3) Embodiment Figures 1 and 2 show a sheet metal workpiece W used to obtain an outer panel for an automobile as a product, and the workpiece W includes a main body 1 and a bent edge connected to the outer edge of the main body 1. 2. The bent edge 2 includes a flat top 3, a first hanging portion ₄₁ that slopes downward from one side toward the main body 1, a continuous portion 5 that slopes downward from the other side of the top 3, and the continuous portion. 5, and a second hanging portion ₄₂ that hangs down substantially vertically. The main body 1 is formed with an insertion opening 6 through which a cam slide (described later) passes.

As shown in FIGS. 3 and 4, a plurality of seal locking holes 7 are formed in the top part 3 of the workpiece W by piercing, and the lower edge of the second hanging part 4 ₂ is connected to the first hanging part 4 ₁ side. The outer panel P is obtained by bending to form the hook-shaped portion 8 and further shearing the outside of the insertion opening 6 to form the window hole 9. In this outer panel P, the width a of the top portion 3 is set wider than the bending length b of the hook-shaped portion 8 in order to enable the mold release.

Hereinafter, referring to FIGS. 5 to 7, the outer panel P
The manufacturing process will be explained.

The manufacturing device that performs bending, piercing, and shearing includes an upper holder 10 that can be raised and lowered;
A lower holder 11 is provided below which is fixed.

A shearing die 12 for forming the window hole 9 is fixed to the upper surface of the lower holder 11, and a shearing punch 13 that cooperates with the shearing die 12 is attached to the lower surface of the upper holder 10 above the shearing die 12. A workpiece pressing pad 14 is suspended from an upper holder 10 by a plurality of hanger pins 15 on the outer periphery of the shearing punch 13, and a plurality of cushion springs 16 are interposed between the upper holder 10 and the pad 14.

A bending die 17 is provided on one side of the shearing die 12 . The bending die 17 consists of a fixed part 19 equipped with a hook-shaped bending blade 18 projecting laterally, and a movable part 21 slidably engaged in a groove 20 between the shearing dies 12 of the fixed part 19 so as to be able to rise and fall. . The fixing portion 19 has a top surface 2 that receives the lower surface of the continuous portion 5 of the workpiece W.
2, and the movable portion 21 has a top surface 23 that receives the top portion 3 of the work W and the lower surface of the first hanging portion 4 ₁ . Further, the movable portion 21 is arranged at a position corresponding to each seal locking hole 7. Guide grooves 2 extending in the vertical direction are provided on opposing inner surfaces of the grooves 20, respectively.
4 is formed, and the flange 25 of the movable part 21 is slidably fitted into the guide groove 24. A return spring 26 is compressed between the upper surface of the flange 25 and the upper end surfaces of both guide grooves 24, and the elastic force of the spring 26 urges the movable portion 21 downward.

Below the movable part 21, a first cam slide ₂₇₁ that moves up and down the movable part 21 is slidably provided on the upper surface of the lower holder 11. The first cam slide 27 ₁ has a lower flat surface 28 and a lower flat surface 2 thereof.
A slope 29 connected to 8 and having an upward slope
and an upper flat surface 30 connected to the inclined surface 29.
The lower end surface of the movable portion 21 can slide on these three surfaces 28 to 30.

Lower flat surface 2 in the first cam slide 27 ₁
A return spring 32 is compressed between the end face on the 8 side and a spring receiver 31 that is erected on the lower holder 11 opposite thereto, and the elastic force of the spring 32 causes the first cam slide 27 1 to move to the first cam slide 27 ₁ . When the movable part 21 slides to the left in FIG.
It is located below the inner edge 20a on the shearing die 12 side. 34 is a guide rod for the first cam slide ₂₇₁ .

Upper flat surface 3 in the first cam slide 27 ₁
An actuating part 36 having a slope 35 is erected at the end on the 0 side, and the actuating part 36 passes through the opening 12a of the shearing die 12. The first cam driver 38 ₁ has a slope 37 on the lower surface of the upper holder 10 above the actuating part 36 and can slide on the slope 35 .
is installed. This first cam driver 38 ₁ allows the first cam slide 27 ₁ to slide to the right in FIG.

On the side of the bending blade 18 of the bending die 17,
A second cam slide 27 ₂ having a slope 39 is slidably provided on the upper surface of the lower holder 11 , and the second cam slide 27 ₂ is provided with a bending punch 40 that cooperates with the bending blade 18 . A second cam driver 38 ₂ is attached to the lower surface of the upper holder 10 above the second cam slide 27 ₂ and has a slope 41 that can slide on the slope 39 of the second cam slide 27 ₂ . The second cam driver 38 ₂ allows the second cam slide 27 ₂ to slide toward the bending die 17 to the left in FIG. 5 . Spring receiver 3
A return spring 42 is installed between the cam slide 1 and the second cam slide 27 ₂ , and the elastic force of the spring 42 causes the second cam slide 27 ₂ to slide and bend to the right in FIG. The punch 40 is spaced apart from the bending die 17. 43a is the guide rod 43
A stopper 48 of the second cam slide 272 provided at the end of the second cam slide ₂₇ is provided upright on the lower holder 11 and
This is a guide member that slides on the cam driver ₃₈₂ .

The movable part 21 of the bending die 17 has a top surface 23 thereof.
A die hole 44 for piercing is formed, and a piercing punch 45 is attached to the lower surface of the upper holder 10 above the die hole 44. A guide hole 46 for a piercing punch 45 is formed in the pad 14.

Next, the manufacturing operation of the outer panel P using the above-mentioned apparatus will be explained.

When the upper holder ₁₀ is raised as shown in FIG. The movable portion 21 is lowered by the elastic force of the return spring 26, and its lower end surface is in contact with the lower flat surface 28 of the first cam slide ₂₇₁ . Further, the second cam slide ₂₇₂ slides to the right due to the elastic force of the return spring 42 and comes into contact with the stopper 43, and the bending punch 40 moves the bending blade 18.
They are more spaced apart.

The main body 1 of the workpiece W is cut on the top surface 4 of the shearing die 12.
7, and the continuous portion 5 is placed on the top surface 2 of the fixing portion 19.
2 and the second hanging part 4 ₂ is placed on the hook-shaped bending blade 18
Add it to the side of the In this case, the first cam slide 2
Since the actuating part 36 of 7 ₁ is located inside the insertion opening 6 of the workpiece W, the actuating part 36 and the workpiece W do not interfere with each other.

Next, when the upper holder 10 is lowered, the slope 37 of the first cam driver 38 ₁ comes into sliding contact with the slope 35 of the first cam slide 27 ₁ , so the first cam slide 27 ₁ slides to the right in FIG. As a result, as shown in FIGS. 6 and 7a, the lower end surface of the movable part 21 in the bending die 17 is
Since it comes into sliding contact with the upper flat surface 30 via the inclined surface 29 of 7 ₁ , the movable portion 21 rises and its top surface 23 comes into contact with the lower surface of the first hanging portion 4 ₁ and the top portion 3 of the workpiece W. Then, as shown in FIG. 7a, the pad 14
As a result, the main body 1 of the workpiece W is exposed to the top surface 4 of the shearing die 12.
7, and the bent edge 2 is pressed so that it is attached to the fixed and movable parts 19, 20. Also, since the slope 41 of the second cam driver 38 ₂ comes into sliding contact with the slope 39 of the second cam slide 27 ₂ , the second cam slide 27 ₂ slides to the left in FIG. Then, the lower edge of the second hanging portion 4 ₂ of the workpiece W is bent toward the first hanging portion 4 ₁ side by the cooperation of the bending blade 18 and the bending punch 40 to form the hook-shaped portion 8 . Furthermore, since the piercing punch 45 penetrates the top part 3 of the workpiece W, the seal locking hole 7 is formed by the cooperation of the piercing punch 45 and the die hole 20, and furthermore, the cooperation of the shearing punch 13 and the shearing die 12 A window hole 9 is formed.

Outer panel P is obtained through the above steps.

When the upper holder 10 is raised after the processing, the first and second cam slides 27 ₁ , 27 ₂ return to the left and right as shown in FIG.
Each slides due to the elastic force of 2.

As shown in FIGS. 5 and 7c, due to the sliding of the first cam slide ₂₇₁ , the movable part 21 of the bending die 17 is lowered by the elastic force of the return spring 26, and the lower end surface of the movable part 21 is lowered by the first cam slide 271. Lower flat surface 28 of slide 27 ₁
sliding into contact with. As a result, the top surface 23 of the movable part 21 is located below the first hanging part 4 ₁ of the outer panel P, and there is a bending length b of the hook-shaped part 8 between the inner surface of the first hanging part 4 ₁ and the fixed part 19. Mold release space S wider than
is formed.

In this state, the outer panel P is fixed to the fixing part 19.
When pushed to the side, the space S allows the first hanging part ₄₁ to move laterally as shown by the chain line in FIG.
The hook-shaped portion 8 comes off from the bending blade 18 and the mold is released.

Note that the present invention is not limited to the workpiece having the above-mentioned shape, and the bent edge or the entire workpiece may be formed into an inverted V-shape in cross section, with one inclined part serving as a first hanging part and the other inclined part serving as a continuous part. It can also be applied to a structure in which a second hanging part is connected to the lower edge, a structure having an inverted U-shape in cross section, a structure in which the first and second hanging parts are formed perpendicular to the top surface, etc.

C. Effects of the Invention According to the manufacturing method of the present invention, since the movable part is raised during the bending process, the workpiece can be securely fixed by providing a sufficient presser allowance for the workpiece, and the bending process accuracy can be improved. In addition, since the movable part is lowered during demolding, the product can be moved laterally and the hook-shaped part can be easily removed from the hook-shaped bending blade.
As a result, highly accurate bent products can be efficiently obtained.

Further, according to the manufacturing apparatus according to the present invention, it is possible to perform the piercing process at the same time as the bending process, thereby improving the efficiency of both operations and reducing the cost of the product. Compared to the case where they are provided separately, it is possible to simplify the device and save space for installing the device.

[Brief explanation of drawings]

Figure 1 is a plan view of the main part of the workpiece, Figure 2 is the top view of the main part of the workpiece.
Fig. 3 is a plan view of the main parts of the product; Fig. 4 is an enlarged sectional view of Fig. 3 - line enlarged sectional view;
The figure is a longitudinal sectional side view of an embodiment of the apparatus of the present invention before processing, and FIG. 6 is a longitudinal sectional side view of the same apparatus after processing.
FIG. 7 is an explanatory diagram of the processing steps. S... Space for mold release, P... Outer panel as a product, W... Work, 2... Top, 4 ₁ , 4 ₂ ...
...First and second hanging parts, 8...Hook-shaped part, 17...Bending die, 18...Bending blade, 19...Fixing part,
21...Movable part, 40...Bending punch, 44...
...Die hole, 45...Piercing punch.

Claims (1)

[Scope of Claims] 1. Bend the lower edge of the second hanging part of a sheet metal workpiece having a first hanging part on one side of the top and a second hanging part on the other side toward the first hanging part. In order to obtain a product having a hook-shaped part, a fixing part having a hook-shaped bending blade corresponding to the hook-shaped part, and a fixing part disposed adjacent to the fixing part, which rises and separates during the bending process, are provided. Using a bending die equipped with a movable part that descends during molding, the first hanging part of the workpiece is positioned on the movable part side, and the second hanging part of the workpiece is positioned on the fixed part side. a bending step of applying the product to the bending die and then forming the hook-shaped portion to obtain the product; lowering the movable portion between the first hanging portion and the fixed portion of the product; The first
forming a release space wider than the bending length of the hook-shaped portion to allow lateral movement of the hanging portion toward the fixing portion; pushing the product toward the fixing portion; A method for manufacturing a bent product, comprising: a mold release step of removing the hook-shaped portion from the bending blade. 2. A sheet metal workpiece having a first hanging part on one side of the top and a second hanging part on the other side has a hook-shaped part by bending the lower edge of the second hanging part toward the first hanging part. A manufacturing device for obtaining a product, comprising: a bending die for attaching the workpiece; and a bending punch for forming the hook-shaped portion on the workpiece in cooperation with the die; a fixed part located on the second hanging part side of the workpiece and having a hook-shaped bending blade corresponding to the hook-shaped part, and a fixed part located on the first hanging part side of the workpiece and adjacent to the fixed part. When the workpiece is bent, the movable part moves up to allow the workpiece to adhere to the workpiece, and when the product is released from the mold, the movable part descends and bends the product. A mold release space wider than the bending length of the hook-shaped portion may be formed between the first hanging portion and the fixing portion to allow lateral movement of the first hanging portion toward the fixing portion. The apparatus for producing a folded product, wherein the movable part is configured to be movable up and down, and the bending die is provided with a die hole that cooperates with a piercing punch.