JPH02207928A - Method and device for trimming working of panel material - Google Patents

Abstract

PURPOSE:To improve the production efficiency of a panel material by separating a product part and a scrap by a trimming die, shifting one of them in the vertical direction, carrying both of them into a division use die and supporting them, and dividing and cutting the scrap. CONSTITUTION:By bringing a plate-like panel material P to drawing, a product part W is formed, and a scrap part S is separated and cut. In this state, the product part W and the scrap part S are separated in a trimming die. Thereafter, at least one of both W, S is allowed to ascend and moved and the position in the vertical direction is shifted. Subsequently, both W, S after the separation are carried into a scrap division use die, in which in a state that both W, S are shifted in the vertical direction and supported, only the scrap part S is separated and cut into plural parts. Next, the product part W is carried to the next process die. In such a way, a product having a high quality can be formed.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention involves drawing a flat panel material to form a product part thereon, and then removing the scrap part continuous to the outer peripheral surface of the product part. The present invention relates to a method and apparatus for trimming a panel material to separate it from a section.

(Prior Art) Many of the panels constituting an automobile body are formed by drawing a flat panel material called a blank material using a press.

FIG. 11 is a schematic diagram showing a conventional process for forming a door outer panel, which becomes a door of an automobile body, from a blank material into a desired shape as an example of a panel material constituting an automobile body. As shown in the figure, in step A, a flat panel material, that is, a blank material P, is subjected to drawing processing, that is, draw processing, using a drawing press mold. If the product part W, that is, the door outer panel, is to be formed by this processing, the product part W that has the shape of the door outer panel
A scrap part S is formed on the outer circumferential surface of the scrap part S, which is connected to the scrap part S. This scrap part S is inevitably generated because it is necessary to press the outer periphery of the panel material P when forming the product part W using a press die for drawing processing, and it is necessary to separate this scrap part in a later process. becomes inevitable.

Therefore, in step B, the product part W is cut out from the scrap part S using a trimming die. This process B
Since the scrap part S has a loop shape surrounding the product part W, conventionally, the scrap part S is divided into a plurality of parts at the same time as the trimming process, and the scrap part S can be easily discharged to the outside. Let it be done.

In step B of FIG. 11, the gap between the product part W and the scrap S divided into a plurality of parts is exaggerated to show that they are separated from each other. The panel material P, which has only the product part W in this way, is transported to the next process C, where the end of the product part W is bent, that is, flanged, and then a beam strike process is performed in the process. It will be done. This restriking process is a process in which the product part W is drawn into the shape of the final product and the flange part is further subjected to plastic working, and in many cases, the forming of the product part W is completed in this process. However, it may also include other steps.

FIGS. 12 and 13 are diagrams showing a trimming mold used in the trim process B, and this mold includes a lower mold or punch 2 fixed on a bolster 1, and a Upper mold that can move up and down, that is, upper holder 3
It has This vertical movement of the upper holder 3 is performed by a vertical movement member 4. A trim blade corresponding to the outer peripheral contour of the product part W is formed on the punch 2, and a trim blade for cutting the panel material P in cooperation with this trim blade is formed on the upper holder 3. In order to press the panel material against the punch 2 during cutting, the upper holder 3 is provided with a pad 5 that can be moved up and down relative to the punch 2.

In order to separate the product part W and the scrap part S using this mold and at the same time divide the scrap part S into a plurality of parts,
The lower mold 2 and the upper mold 3 are provided with scrap cutters 6.7. These scrap cutters are the 13th
As shown in the figure, six sets are provided, and the scrap part S is cut into six small pieces. Lower to discharge the divided scrap part S to the outside of the mold! L12
A scrap chute 8 is attached to the. The scrap S that has been divided into small pieces will be discharged to the outside by its own weight, and the product section W will be moved to the lifter 9 after the upper mold 3 is separated upward.
It is lifted up by a finger (not shown) and conveyed to the next flange process C.

(Problem to be Solved by the Invention) In the conventional example described above, the trimming mold is used to perform trimming and also to divide the scrap part.
The division and cutting of the scrap part S by the scrap cutter 7.8 may even affect the product part W, causing deformation of the product part W. In addition, when the scrap part S is divided and cut, the edges of the scrap part S may be scattered on the surface of the product part W.
If it is interposed between the mold and the lower mold, a molding defect called a star pattern may occur on the surface of the product part W. Furthermore, if the scrap part S is divided as well as trimming as in the past, the scrap part S can be reliably discharged under its own weight while avoiding interference with the lower die 2 for trimming. It was necessary to increase the number of divisions of the scrap part S and to set the shape of each divided scrap small. Therefore, the weight of each piece of scrap after dividing becomes smaller, and the scrap S does not fall down under its own weight along the scrap chute 8, which may clog the mold, which hinders production efficiency. was there.

The present invention has been made in view of the above-mentioned problems of the prior art, and it maintains the efficiency of processing by sequentially conveying panel materials to a plurality of molds arranged at predetermined intervals. An object of the present invention is to make it possible to mold a high-quality product without affecting the product part by dividing and cutting the scrap, and to ensure that the scrap is discharged.

Another object of the present invention is to support both the product part and the scrap part in a scrap mold, and to vertically shift the product part and the scrap part from each other when dividing and cutting only the scrap part. By dividing the scrap in this state, the effect of dividing and cutting the scrap part does not affect the product part, and it is possible to mold a high-quality product.

Still another object of the present invention is to carry out the divisional cutting with only the scrap part supported by scrap division dies arranged in a line together with other dies, in order to improve product productivity. By doing so, it is possible to mold high-quality products with high efficiency.

Furthermore, the present invention ensures that the product part and the scrap part separated from the panel material after drawing are transported to the next process while being shifted in the vertical direction, thereby improving production efficiency. The purpose is to do so.

(Means for Solving the Problems) The present invention for achieving the above object is such that after forming a product part by drawing a flat panel material, the product part and its outer periphery are connected in a loop shape. A method for trimming a panel material, in which a scrap part is separated from each other and the scrap part is cut into a plurality of parts, the method comprising: separating the product part from the scrap part in a trimming mold; and the scrap part are moved upward to shift the vertical positions of the product part and the scrap, and the separated product part and the scrap part are transported into a scrap dividing mold, The product part and the scrap part are supported in a vertically shifted manner in the scrap dividing mold, and only the scrap part is divided into a plurality of parts, and the product part is transported to the next process mold. This is a trimming method for panel materials. In addition, the present invention involves forming a product part by drawing a flat panel material, and then separating the product part and a scrap part continuous in a loop around the outer periphery of the product part, and forming a plurality of scrap parts. A method for trimming a panel material to be cut into parts, the method comprising separating the product part and the scrap part in a trimming mold, and then moving at least one of the product part and the scrap part upward. The vertical positions of the product part and the scrap are shifted, and the scrap part and the product part are placed in a scrap dividing mold and a next process mold, respectively, which are installed downstream of the trimming mold in the conveyance direction. When transporting the
Either the product part or the scrap part to be transported to one of the scrap dividing molds and the next process mold located on the downstream side in the transport direction is passed through the other mold. This is a trimming method for a panel material, in which the scrap part is transported by the scrap part and cut into a plurality of parts by the scrap parting die. Further, in the present invention, after forming a product part by drawing a flat panel material, the product part and a scrap part continuous in a loop around the outer periphery of the product part are separated from each other, and the scrap part is divided into a plurality of parts. This is a trimming processing device for panel materials that is cut into parts, and has a lower mold and an upper mold that can move up and down with respect to the lower mold, and divides the panel materials that have been drawn in the previous process into the product section and the scrap section. A trimming mold that is separated into two parts is provided with a lifter that raises at least one of the product part and the scrap part, and a first finger that grips the product part and the scrap part are moved up and down with respect to the product part. This is a panel material trimming device in which second fingers that are gripped at positions shifted in the direction are movably installed between the trimming mold and the next process mold.

(Function) The panel material after drawing is placed in the trimming mold.
It is separated into a product part and a scrap part, and each part is simultaneously conveyed into a scrap dividing mold. At this time,
After being separated in the trimming mold, the product part and the scrap part are vertically shifted in position, and are carried into the scrap dividing mold in a shifted state. Then, within this scrap dividing mold, the scrap is divided and cut into a plurality of pieces at positions vertically shifted from the product part. During this division cutting, there is no trimming mold provided in the scrap division mold, so the scrap can be divided into relatively large shapes without being affected by trimming, and each scrap can be cut into relatively large shapes. The scrap parts after division are reliably discharged to the outside with a large weight.

In addition, after the product part and the scrap part are separated in the trimming mold, the positions of each part are shifted in the vertical direction, so that the product part can be transported to the next processing step, while the scrap part is carried into the scrap division mold. be done. In this case, one of the product part and the scrap part is conveyed through a mold for processing the other part. For example, when a scrap dividing mold is installed next to a trimming mold, the product part passes through this scrap dividing mold and is carried into the mold for the next process.

Therefore, the scrap part is independently divided and cut within the scrap dividing mold in the absence of the product part, so that the scrap can be divided into relatively large shapes.

Furthermore, in the trimming mold, the product part and the scrap part are set to be vertically misaligned, and these are the first finger that grips the product part and the second finger that grips the scrap part. This ensures that each piece is transported to the next process while maintaining a predetermined positional shift in the vertical direction.

(Example) Hereinafter, the illustrated example of the present invention will be described in detail.

FIG. 1 is a diagram showing the processing steps in the trimming method of the present invention. In the trimming step B, which is provided after the drawing step A, the product part W and its entire outer periphery are connected in a loop shape. A panel material P consisting of a scrap part S is separated into a product part W and a scrap part S, and the product part W is trimmed. After separation,
The product part W and the scrap part S are vertically shifted from each other in a trimming mold that constitutes this process, and are supported by a scrap dividing mold placed adjacent to the trimming mold, As shown in process E, the scrap S is divided.

Process C is a flange processing process similar to the conventional example shown in FIG. 11, and the process is a restriking process. The five molds that make up these five processes are arranged in a line at predetermined intervals, and a transfer press is used to mass-produce products by sequentially conveying panel material P, which is a workpiece, to these molds. It consists of

2(A) and 2(B) are views showing the trimming metal ulO constituting the trimming process B shown in FIG. 1, respectively, and FIG. 3 shows the lower mold of this trimming mold 10. part is shown.

This mold has a lower mold, or punch 12, fixed on a bolster 11, and an upper mold, or upper holder 13, which is movable up and down with respect to the punch 12.

The vertical movement of the upper holder 13 is performed by a vertical movement member 14 to which it is attached. A trim blade corresponding to the outer peripheral contour of the product part W is formed on the punch 12, and a trim blade for cutting the panel material P in cooperation with this trim blade is formed on the upper holder 13. In order to press the panel material P against the punch during cutting, the upper holder 13 is provided with a pad 15 that can be moved up and down relative to the punch.

In order to support the scrap part S separated from the product part W with such a trimming mold 10 on the lower mold 12,
Nests 20 for receiving scraps S are attached to the lower die 12 at a plurality of locations.

A cylinder 21 is attached to the center of the lower die 12, and a rod 22 that moves forward and backward in the vertical direction by the cylinder 21 has a rod 22 at its tip, which carries the product part W separated from the scrap S, and the upper die 13 lifts the product part W separated from the scrap S. Later, a stand 23 is fixed to the workpiece holder to be supported.

These cylinders 21 and workpiece receivers 23 serve as a lifter 19 that shifts the product section W above the scrap S. In order to smoothly move the table 23 up and down, the workpiece holder has two guide rods 25 fixed to the lower surface of the table 23 passing through a holding plate 26. Figure 2 (
B) shows a state in which the upper die 13 has been raised to the upper limit position, and the product part W has been further moved to the upper limit position by the lifter 24. In this state, the scrap part S has not yet been divided into a plurality of parts, but is loop-shaped, and the product part W is positioned upwardly with respect to the scrap part S. still,
In the case shown in the figure, the scrap part S is supported on the lower mold 12 via the nest 20, and the product part W is raised. Alternatively, the scrap part S may be directly supported by a lifter 19, and the scrap part S may be lifted up by a lifter 19.

Of the product part W and the scrap part S that are shifted from each other as described above, the first fingers 31 are used to grip the product part W at both ends thereof, and the scrap part S is gripped at both ends thereof. A second finger 32 for this purpose is arranged adjacent to the lower die 12, as shown in FIG. 2(B). By means of these fingers 31, 32, the product part W and the scrap part 32 are conveyed in the directions indicated by the arrows in FIG. 3, respectively.

The details of these fingers 3L 32 are shown in FIG. 4. As shown in the figure, receivers 31a and 32a are fixed to the tips of the respective fingers 31 and 32, the second finger 32 is directly fixed to the arm plate 33 at the rear end, and the first finger 31 is fixed to the arm plate 33 via a spacer 34. and is fixed to the arm plate 33. This arm plate 33 is sandwiched between touch plates 35 and fixed to a rail 37 with bolts 36, and furthermore, this rail 37
is fixed to the clamp base 38.

Further, this clamp base 38 is fixed to a feed bar 39.

FIG. 2(B), by the conveyance device shown in FIG.

As shown, after the product part W and the scrap part S are shifted in the vertical direction and have a predetermined level difference, the feed bar 39 moves forward toward the panel shed.
The product part W and the scrap part each have fingers 31.3
2. Then, after the feed bar 39 has been raised by a predetermined distance, it is moved in the workpiece conveying direction, whereby the product portion W and the scrap portion S are each carried into the mold for the next scrap dividing step E. After the conveyance, when the feed bar 39 is lowered, the product part W and the scrap part S are placed on the lower part of the mold.

5 and 6 are diagrams showing a scrap dividing mold 40 constituting the scrap dividing process E shown in FIG. 1.

As shown in the figure, the basic structure of this scrap dividing mold 40 is the same as that of the trimming mold 10, and includes a lower mold 42 fixed on a bolster 41 and movable up and down toward the lower mold 42. It has an upper mold, that is, an upper holder 43. The upper mold 43 is moved up and down by a vertical movement member 44 to which it is attached. The lower mold 42 has a sixth
As can be seen, four scrap cutters 46
are attached to the upper holder 43, and four scrap cutters or sectional dies 47 are attached to the upper holder 43 for cutting the scrap portion S into sections in cooperation with the scrap cutter 46.

A loop-shaped scrap part S is carried in from the trimming mold 10 by the finger 32, and the downward movement of the finger 32 ensures that the scrap part S is placed on the scrap cutter 46 in a predetermined posture. Eight guide nests 51 are attached to the top of the lower die 42 as shown in FIG. Each guide nest 51
has an inclined surface formed on its outer surface.

Furthermore, two supports 52 are attached to the lower die 42 to support the product portion W conveyed by the fingers 31. This support is configured such that the product section W is supported by the stand 52 at a position shifted upwards from the scrap section S, so that even if the upper holder 44 moves downward to the lowest time limit position, the product section W remains unchanged. It is designed so that it does not interfere with the upper holder 44.

A scrap chute 48 is attached to the lower mold 42 in order to discharge the scrap portion S divided into four parts by the scrap cutters 46 and 47 to the outside of the scrap dividing mold 40. In the illustrated scrap dividing mold 40 of the present invention, the lower mold 42 is not formed with a trim blade, so the number of divisions of the scrap part S is smaller than that of the conventional method, and the scrap part after one division is The shape of S can be made larger. Therefore, one scrap part S is heavier than the conventional one, and is reliably discharged from the scrap chute 48 by its own weight.

FIG. 7 is a diagram showing processing steps of a method for trimming a panel material according to another embodiment of the present invention, in which the panel material is separated into a product part W and a scrap part S in the trimming process B shown in FIG. Afterwards, the scrap part S is transported to a scrap dividing process F provided next to the trimming process B, and the product part W passes through this process F and is directly transported to the next processing process, that is, the flange processing process C1. That will happen.

Therefore, from the trimming step B, the product section W is transported at twice the speed of the scrap section S. However, the scrap dividing process F may be installed between the flange processing process C and the restriking process.

FIG. 8 is a plan view showing the arrangement of the molds from the trimming step B to the flange step C in the processing steps shown in FIG. 7, including a trimming mold 60 and a scrap dividing mold 70. and a flange processing mold 80 are arranged in a line at predetermined intervals. A sectional view of the trimming mold 60 is shown in FIG.

The basic structure of the illustrated trimming die J160 is almost the same as the trimming die 10 of the above embodiment shown in FIGS. The members are given the same reference numerals.

A first feed bar 91 is installed on both sides of the three molds 60, 70, and 80 shown in FIG. 8 so as to be able to reciprocate in the conveyance direction, and a second feed bar 92 is also provided so as to be able to reciprocate in the same direction. It is laid down.

A first finger 31 for gripping the product part W is fixed to the first feed bar 91, and a second finger 32 for gripping the scrap part S is fixed to the second feed bar 92.
is fixed. These fingers 31, 32 approach each other and grip the respective product part W and scrap part S by moving the respective feed bars 91, 92 in the lateral direction perpendicular to the conveyance direction. become.

As is clear from FIG. 9, the first finger 91 for conveying the product part W is located above the second finger 92 for conveying the scrap part S. Therefore, in the trimming mold 60 shown in FIG. 9, the panel) tA P after the product part W has been plastically worked in the previous drawing process is separated into the product part W and the scrap part S. , and is moved upwardly by the lifter 19 to a position shifted above the scrap S. In this state, the fingers 31 and 32 move forward to grip the product part W and the scrap part S. Furthermore, these fingers 31.
32 is raised, the feed bars 91, 92 move forward in the conveyance direction. At this time, the first feed bar 91 for conveying the product part W moves at twice the speed of the second feed bar 92 for conveying the scrap part S, and the product part W is transferred to the mold 80 for flange processing. transported to
The scrap portion S is conveyed to a scrap dividing mold 70 adjacent to the trimming mold 60.

Figure 10 shows the scrap dividing mold 70 shown in Figure 8.
This scrap dividing mold 70 has the same basic structure as the scrap dividing mold 40 in the embodiment shown in FIG. A code is attached. However, since this scrap dividing mold 70 does not need to support the product part W, the workpiece support 52 shown in FIG.
is not incorporated into. Although the lower die 42 shown in FIG. 10 is not provided with the nest 51 shown in FIG. 5, it may be incorporated therein.

In FIG. 10, the second hooker 32 and the second feed bar 92 at the positions indicated by solid lines are in a state where the scrap part S is placed on the lower die 42, and in the state before being lowered to this position. The second finger and the second feed bar are at positions indicated by virtual lines 32b and 92b, respectively. The positions of the first finger and the first feed bar at this position are shown by imaginary lines 31b and 91b, and the product part W passes through this scrap dividing mold 70 with the upper mold 43 at its upper limit. I will do it.

Product department W is the mold 80 for the flange process, which is the next processing process.
The scrap part S is carried into the scrap dividing mold 7.
0, the upper molds of the respective molds move downward, so that the flange processing of the product part W and the division processing of the scrap S are performed simultaneously. At this time, predetermined processing is performed on other panel materials in other processing steps as well.

(Effects of the Invention) As described above, according to the present invention, after the trimming mold is separated into the product part and the scrap part, the vertical positions of the product part and the scrap part are shifted. These are simultaneously carried into the scrap dividing mold by the first finger and the second finger. Then, the product part and the scrap part are supported in a scrap division mold in a mutually shifted state, and the scrap part is divided into multiple parts. Because it is carried out under conditions that are not
By reducing the number of scrap parts to be divided, it is possible to set the shape of each divided scrap to be large, and each scrap has a relatively large weight and is reliably discharged outside the mold. Become. As a result, the scrap does not cause mold clogging, making it possible to significantly improve production efficiency. In addition, when dividing scrap, even if the particles or sag that occur on the dividing surface of the scrap are scattered, it does not reach the product part, and the presence of scattered objects in the subsequent processing process. This makes it possible to mold high-quality products without causing molding defects such as star marks.

This special effect can be obtained even if after separating the product part and scrap part, only the scrap part is conveyed to the scrap dividing mold and the product part is conveyed to the next processing process. Similar results will be obtained since the splitting will take place at a location remote from the product section.

The product part and the scrap part are transported by the first and second fingers that move between the respective molds, making it possible to plastically process mass-produced products with high processing efficiency.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a panel material processing process including a panel trimming process according to an embodiment of the present invention;
Figures (A) and (B) respectively show trimming molds for the trimming process shown in Figure 1.
■Cross-sectional view along the line - Figure 3 is a plan view showing the lower part of the trimming mold shown in Figures 2 (A) and (B), Figure 4 is a plan view of the lower part of the trimming mold shown in Figures 2 (A) and (B). FIG. 5 is a perspective view showing the first finger and the second finger shown in FIG. 6 is a plan view showing the lower part of the scrap dividing mold shown in FIG. 5, and FIG. 7 is a plan view showing the trimming process of a panel material according to another embodiment of the present invention. FIG. 8 is a plan view showing the processing steps for the panel material shown in FIG. 7, and FIG.
The figure is a sectional view taken along line IX-IX in Figure 8,
The figure is a sectional view taken along the line X-X in Figure 8, Figure 11 is a plan view showing the panel material processing process including the conventional trimming process, and Figure 12 is the conventional process shown in Figure 11. FIG. 13 is a sectional view showing the trimming mold, and FIG. 13 is a plan view showing the lower part of the trimming mold shown in FIG. 12. 10... Trimming mold, 19... Su... 1st
Finger, 32...Second fin...Mold for scrap division, 60...G type, 70...Mold for scrap division, S...Scrap part, W...Product part. Lid 131 Nugger, 40 Rimming gold P...panel material,

Claims (3)

[Claims] (1) After drawing a flat panel material to form a product part, the product part and a scrap part connected in a loop shape around the outer periphery of the product part are separated from each other, and the scrap part is cut into multiple parts. A method for trimming a panel material, wherein after separating the product part and the scrap part in a trimming mold, at least one of the product part and the scrap part is moved upward to remove the product part. Shift the vertical positions of the product part and the scrap part, transport the separated product part and the scrap part into a scrap dividing mold, and separate the product part and the scrap part in the scrap dividing mold. A method for trimming a panel material, in which only the scrap part is cut into a plurality of parts while being shifted and supported in the vertical direction, and the product part is conveyed to a mold for the next process. (2) After forming a product part by drawing a flat panel material, the product part and a scrap part connected in a loop shape around the outer periphery of the product part are separated from each other, and the scrap part is cut into a plurality of parts. A method for trimming a panel material, wherein after separating the product part and the scrap part in a trimming mold, at least one of the product part and the scrap part is moved upward to remove the product part. and the scrap in a vertical direction, and transport the scrap part and the product part to a scrap dividing mold and a next process mold, which are respectively installed downstream of the trimming mold in the transport direction. At this time, one of the product part and the scrap part to be transported to one of the scrap dividing mold and the next process mold located on the downstream side in the transport direction is transferred to the other mold. A method for trimming a panel material by transporting the scrap through a panel material, and dividing the scrap into a plurality of pieces using the scrap dividing mold. (3) After drawing a flat panel material to form a product part, the product part and a scrap part connected in a loop shape around the outer periphery of the product part are separated from each other, and the scrap part is cut into a plurality of parts. The panel material trimming device has a lower die and an upper die that is vertically movable relative to the lower die, and separates the panel material that has been drawn in a previous process into the product section and the scrap section. A trimming mold to be separated is provided with a lifter for lifting at least one of the product part and the scrap part, and a first lifter for gripping the product part is provided.
A panel in which a finger and a second finger that grips the scrap part at a position shifted in the vertical direction with respect to the product part are respectively movably installed between the trimming mold and the next process mold. Material trimming equipment.