JPH0747433A - Blank stock forming method - Google Patents

Abstract

PURPOSE:To almost simultaneously cut a large blank stock and a scrap stock, and a small blank stock punched from this scrap stock with respect to a stock in the course of one stroke of a metallic die. CONSTITUTION:By bringing a slide 65 close to a bolster, a coil stock 19 is pinched, pressed and held by a holding member. Subsequently, a slit is formed along a part of a boundary line of a large blank stock part and a scrap part S, of the held coil stock 19. Next, by bending the slit, a flange part F is formed in the scrap stock S. Thereafter, trimming is executed to a remaining part of the boundary line of the coil stock 19, and detaching the scrap part S from the coil stock 19, a large blank stock is formed. Also, by cutting the scrap part S, a small blank stock is formed. These processes are executed in the course of one stroke of a metallic die 35.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a blank material from a material such as a coil material, and in particular, it utilizes a scrap material produced when forming the blank material to form a blank material for another component. Blank material forming method.

[0002]

2. Description of the Related Art A blank material for a panel part of an automobile body is generally formed by cutting a flat steel plate such as a coil material into a desired shape. For this molding, for example, a blank mold (hereinafter, simply referred to as a mold) 11 as shown in FIG. 9 is used. As shown in the figure, the mold 11 has a bolster 13 and a slide 15 that can be moved toward and away from the bolster 13, and an upper holder 17 is attached to the slide 15. The bolster 13 and the upper holder 17 are provided with sectional dies 21 and 23 for performing trim processing on a material such as the coil material 19 in cooperation with each other. Therefore, when the coil material 19 is carried into the mold 11, the upper holder 17 moves downward from above, and by the cooperation of both the sectional dies 21 and 23,
The coil material 19 is trimmed, and the coil material 1
9 is cut into a blank material B and a scrap material S.

With such a mold 11, for example, FIG.
If the blank material B of the integral body side member as shown in FIG. 11 is molded, the mold 11 having the sectional die D arranged as shown in FIG.
The scrap portion S shown in FIG. 10 is separated from the coil material 19 to be molded. Then, when one blank material B of the body side member has been formed, the coil material 19 is fed in the longitudinal direction by a distance corresponding to the length of the blank material B, that is, one pitch P, and the next blank material B is fed. B is molded.

When the blank material B is formed in this manner, as shown in the drawing, a scrap material S larger than a so-called small component may be generated. Of the generated scrap material S, a blank material (for a small component) ( Hereinafter, referred to as small blank material) Scrap material S that can be used as a material of b
By collecting the scrap material S into a blank mold (not shown) for forming the small blank material b and removing unnecessary parts.
Is being molded.

Further, a scrap material S produced when a blank material (hereinafter referred to as a large blank material) B is formed is cut in the same mold in which the large blank material B is formed, and a small blank material b is obtained. There is a mold 25 that also molds. Figure 1
As shown in 2 (c), the lower mold of the mold 25 is
A sectional die 27 for punching out the small blank material b1 and a sectional die 29 for punching out the scrap material S are attached respectively, and each time the coil material 19 is fed by half a pitch, an air cylinder (not shown) or the like is used. The sectional dies 27 and 29 are alternately moved forward to the forward position to punch the coil material 19. The upper die also has the same structure, and every time the coil material 19 is fed by a half pitch, the sectional die corresponding to the sectional die moved downward is moved forward and used for punching.

As described above, in the mold 25, when the one-stroke operation of the mold 25 is completed, the coil material 19 is set to be fed by a half pitch which is half the normal feeding amount. As a result, the coil material 19 can be cut twice in one die 25. Therefore, the coil material 19 is always cut by the sectional die 27 for punching the small blank material b1 and the sectional die 29 for punching the scrap material S. That is, when the coil material 19 is loaded into the mold by a half pitch, the upper and lower sectional dies for punching the small blank material b1 are moved forward to the forward position, and the small blank material b1 portion shown in FIG. It is punched from the coil material 19. Then, when it is further fed by a half pitch after this, the upper and lower sectional dies for punching out the scrap material S are moved forward to the forward position, and the scrap portion S shown in FIG. 12B is separated from the coil material 19. And a large blank B is formed.
In this way, the two blanks B and b1 are punched by the single die 25.

[0007]

However, in the method described above, although the conventional mold 11 can be used as it is, in order to obtain the small blank material b, the scrap material S generated during the molding is once recovered. After this, it is necessary to carry it into a die (not shown) for small parts or a shearing press (not shown) for cutting. Thus, in order to obtain the small blank material b from the scrap material S, many new processes are required. In addition, it is necessary to prepare a dedicated die or press for processing the small blank b.
The cost burden is also heavy.

On the other hand, in the method described later, the work of punching the small blank material b1 and the work of punching the scrap material S are performed by setting the feed amount of the coil material 19 for each stroke to half the pitch. It is possible to do this for 19, and thereby it is possible to punch the large blank material B and the small blank material b1 separately. However, for example, in order to remove the small blank material b2 from the scrap material S1 indicated by the reference numeral "S1" in FIG. 12B, it is necessary to install the sectional die 28 indicated by the chain double-dashed line in FIG. 12C. However, a sectional die 29 for punching out the scrap portion S has already been installed here. Therefore, a sectional die for punching the blank material b2 cannot be installed, and the small blank material b2 cannot be punched from the scrap material S1. Even when the sectional dies 25 and 27 are arranged, one large blank B
When molding, the die must be stroked twice at the time of punching the small blank material b and at the time of punching the scrap material S, and the large blank material B is conventionally punched once. Compared with the case of molding, the efficiency is poor.

The present invention has been made in view of the above-mentioned problems, and the mold 1 can be used without changing the feed amount.
An object of the present invention is to provide a blank material forming method capable of cutting a raw material such as a coil material into a large blank material, a scrap material, and a small blank material, which are original forming objects, by performing a stroke operation. .

[0010]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a plurality of first sectional dies attached to a first die and a second second die which can be relatively moved toward and away from the first die. In cooperation with a plurality of second sectional dies attached to a die, a blank metal is formed by separating a scrap portion from a plate-shaped material to form a blank material, and cutting the scrap portion to form a small blank material. A blank material molding method using a mold, wherein the first mold and the second mold are relatively brought close to each other, and the material is held by holding members attached to the first mold and the second mold, respectively. The holding member by the step of holding and holding the first slit sectional die attached to the first die and the second slit sectional die attached to the second die. Forming a slit along the boundary line between the blank material portion and the scrap portion of the held raw material, the first flange sectional die attached to the first die and the second die. A step of bending the slit to form a flange portion in cooperation with a second flange sectional die attached, a first trim sectional die attached to the first die, and a first trim sectional die attached to the second die. (2) Trimming along with the remaining part of the boundary line of the raw material in cooperation with a trim sectional die to separate a scrap portion from the raw material to form a small blank material; The first small blank sectional die attached to the mold and the second small blank sectional die attached to the second mold cooperate with each other. By cutting the wrap portion, and a step of forming a small sub-blank, a blank molding method of performing these steps and the said slide bolster in one stroke for relatively close to and away from.

[0011]

The first mold and the second mold in the relative separated positions are moved relatively close to each other, and the holding members attached to both members clamp and hold the material carried into the mold. When the material is held under pressure, a slit is formed in the material along the boundary between the blank material portion and the scrap portion by the cooperation of the slit sectional dies attached to the first die and the second die. To do. When forming a slit, bend this slit part to form a flange,
A part of the boundary line where the slit is not formed is trimmed to separate the blank material part from the scrap part. After that, the scrap portion is cut to form a small blank material.

[0012]

Embodiments of the present invention will now be described with reference to the drawings. The same members as those already described are designated by the same reference numerals. Mold 3 of this embodiment shown in FIG.
Reference numeral 5 denotes a die for punching the large body side blank B having the shape shown in FIG. As shown in FIG. 1, the mold 35 has a bolster (first mold) 13 whose lower part is fixed. As shown in FIGS. 1 and 3, the bolster 13 corresponds to a U-shaped slit K forming position formed along a boundary line L between the large blank material B and the scrap material S of the coil material 19. The first slit sectional die 41 for arranging the cutting edge portion and the first trim sectional die 43 for arranging the cutting edge portion at a position corresponding to a portion of the boundary line L where the slit K is not formed are installed. There is.

Further, as shown in FIG. 1, the bolster 13
A floating die 47 is attached to this via a spring member 45 and is movable in the processing direction, that is, in the vertical direction. In the upper part of the floating die 47, a cutting blade portion is arranged at a position along a boundary line L between the scrap material S and a small blank material b for so-called small parts punched from the scrap S, and is a section for the first small blank. A die 49 is installed. A conveyor 51 that conveys the punched small blank material b is installed below the first small blank sectional die 49. In addition, the bolster 13 has the coil material 1 carried into the mold 35.
A guide member 53 that supports the member 9 is attached while being biased upward by a spring member 55. Therefore, when a downward load is applied to the guide member 53, the guide member 53 moves downward even when the coil material 19 is placed. Further, the bolster 13 is provided with a kicker 61 that pushes the scrap S out of the mold 35 by means of a rod 59 that allows the air cylinder 57 to move back and forth. Then, the scrap S pushed out by the kicker 61 is the bolster 1
The so-called roller control 63 for carrying out the scrap material S, which is installed in No. 3, is conveyed to a scrap collection container (not shown) or the like.

On the other hand, above the bolster 13, the bolster 1
Slide 6 that can move close to and away from 3, that is, can move up and down
5 is installed, and an upper holder (second mold) 67 is attached to this slide 65. As shown in the figure, in the upper holder 67, the second slit sectional die 69 that forms the slit K at the slit forming position of the coil material 19 in cooperation with the first slit sectional die 41, and the floating die 70. The spring member 71 urges the upper holder 67 downward. Therefore, slide 65
Of the second slit section die 6 by moving the
When the 9 contacts the coil material 19, the sectional die 69
No shock load is applied to the cutting edge of the. Further, in the upper holder 67, a flange sectional die 73 that bends the slit K formed by the cooperation with the first slit sectional die 41 to form the flange F, and a first trim sectional die 43 cooperate with each other. The second trim sectioning die 75 for trimming is attached along the trim line on the boundary line L by
Like the slitting sectional die 69, it is attached to the upper holder 67 through the floating dies 76 and 77, and is biased downward by the spring members 78 and 79. The floating dies 70, 76, 77 can be independently moved up and down with respect to the upper holder 67, so that the sectional dies are not affected by the movement of other sectional dies. The upper holder 65 has a floating die 47 on the bolster 13 side.
Sectional die 4 for the first small blank attached to the
In cooperation with 9, scrap material S to small blank material b
A second small blank sectioning die 81 for punching is attached.

Further, as shown in the figure, pins 83 project from both sides of the upper holder 67. This pin 83
It is installed at a position facing the pin receiving plate 84 provided on the guide member 53 installed on the bolster 13 via the spring member 55, and when the slide 65 is moved downward, the tip of the pin 83 moves to the end of the guide member 53. The pin receiving plate 84 is abutted. In this way, the pin 8 is attached to the pin receiving plate 84.
When the tip end of 3 abuts, the guide member 53 is pushed down, and together with this, the coil material 19 placed on the guide member 53 is also pushed down.

Next, a procedure for punching out the large blank material B for body slide using the mold 35 of this embodiment and punching out the small blank material b from the scrap material S which occurs at the same time will be described. As shown in FIG. 1, the slide 65 is held at a position separated from the bolster, and in this state, the coil material 19 is loaded into the mold 35 by a transport device (not shown) and placed on the guide member 53. To do. Kicker 6
The first rod 59 has been moved to the retracted position as shown. When the coil material 19 is carried into the mold 35,
The slide 65 is moved downward, that is, in the direction close to the bolster 13. When the slide 65 is moved downward,
First, the pin 83 attached to the upper holder 67 contacts the pin receiving plate 84 of the guide member 53, and the pin 83 pushes the guide member 53 downward. When the slide 65 further moves downward and the guide member 53 is pushed down, the coil material 19 placed on the guide member 53 is moved.
Is in contact with a floating holder (not shown) attached to the bolster 13, and is clamped and held by the lower floating holder (not shown) and the floating holder (not shown) attached to the upper holder 67. When the slide 65 is further moved downward after the coil material 19 is clamped and held, the second slit sectional die 69 comes into contact with the slit forming position of the coil material 19, as shown in FIG. By cooperation with the first slit sectioning die 41, the slit K is formed at the slit forming position of the coil material 19 shown in FIG.

After the slit K is formed, the slit K portion is bent by the cooperation of the first slit sectional die 41 and the flange sectional die 73 to form the flange portion F, and the first trim. Sectional Die 43 and Sectional Die 75 for Second Trim
The trim processing is performed along the boundary line L between the large blank material B and the scrap material S, that is, the trim line in cooperation with.
In this way, the large blank material B is formed by performing slit processing and trim processing along the boundary line L and separating the scrap portion S from the coil material 19. Further, as shown in FIG. 5, the slit processing portion of the scrap material S is bent to form the flange portion F. When the slide 65 is further moved downward, as shown in FIG. 6, the second small blank sectional die 81 attached to the upper holder 67 and the first small blank sectional die 49 cooperate with each other. The small blank material b is punched from the scrap material S. The punched small blank material b is placed on the mini-conveyor 51 installed below the first small blank sectional die 49, and is carried out of the mold 35.

On the other hand, when the punching of the small blank material b is completed, the slide 65 starts moving upward, and the pin 83 also moves upward accordingly. When the pin 83 moves upward, the guide member 53 is moved upward by the elastic force of the spring 55. As shown in FIG. 7, the guide member 53
Is moved upward and returns to the reference level, the rod 59 of the kicker 61 in the retracted position is moved forward, and the scrap material S placed on the first small blank sectioning die 49 is moved to the side of the roller control 63. Is extruded into. And the extruded scrap material S is, as shown in FIG.
This roller control 63 conveys the scrap to a scrap collection position (not shown) or the like (not shown). It should be noted that the rod 59 of the kicker 61 starts its operation upon receiving a signal from the position detection sensor, a rotary cam interlocking with the guide member, or the like when the guide member 53 has returned to the reference position. When the scrap material S has been extruded to the roller control 63 side, the rod 59 returns to the retracted position again.

In this embodiment, a part of the boundary line L between the large blank material B and the scrap material S of the coil material 19 is
First, a U-shaped slit K is formed, and the flange portion F is formed by bending the slit K portion.
With this arrangement, when the scrap material S is pushed out of the mold 35 by the kicker 61 thereafter, the surface of the kicker 61 where the tip end portion of the rod 59 abuts is widened, so that the scrap material S can be reliably held in the mold 35. Can be extruded out of.

As described above, according to the apparatus of this embodiment, the step of punching the scrap portion S from the coil material 19 and the like to form the large blank material B and the step of punching the small blank material b from the scrap material S are performed. , A step of forming the flange portion F for ensuring the carrying-out work of the scrap material S,
It can be performed almost simultaneously during one stroke of the mold 35. Further, the large blank material B, the scrap material S, and the small blank material b can be separated from each other and taken out from different positions. Therefore, the scrap material S can be easily used. Further, by forming the flange portion F on a part of the scrap material S, the rod 59 of the kicker 61 that pushes the scrap material S out of the mold 35 can be brought into contact with the scrap material S more reliably. The malfunction can be prevented.

[0021]

As described above, according to the present invention, a step of punching a scrap portion from a coil material or the like to form a large blank material, a step of punching a small blank material b from the scrap material, and a scrap material The step of forming the flange portion for ensuring the carry-out work can be performed almost simultaneously during one stroke of the mold. Therefore, the scrap material can be utilized more easily.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a mold of this embodiment.

FIG. 2 is a front view showing an integrated body side blank material.

FIG. 3 is a plan view showing a lower mold of the mold of this embodiment.

FIG. 4 is a front cross-sectional view showing an operating state of the mold of this embodiment.

FIG. 5: One of scrap members punched from coil material
It is a perspective view showing one.

FIG. 6 is a sectional front view showing an operating state of the mold of this embodiment.

FIG. 7 is a sectional front view showing an operating state of the mold according to the present embodiment.

FIG. 8 is a sectional front view showing an operating state of the mold of this embodiment.

FIG. 9 is a front sectional view showing a conventional mold.

FIG. 10 is a front view showing a blank material for a body side member.

FIG. 11 is a plan view showing a lower mold of a conventional mold.

12 (a) and 12 (b) are front views showing a coil material being processed, and FIG. 12 (c) is a plan view showing a die arrangement in a lower die of another conventional die. It is a figure.

[Explanation of symbols]

35 ... Mold, 41 ... Sectional die for first slit,
43 ... Sectional die for first trim, 49 ... Sectional die for first small blank, 53 ... Guide member,
61 ... Kicker, 67 ... Upper holder, 69 ... Second
Sectional die for slit, 73 ... Sectional die for flange, 75 ... Sectional die for second trim, 8
1 ... Sectional die for second small blank, B ... Large blank material, b ... Small blank material, F ... Flange portion,
K ... Slit, L ... Boundary line, S ...
Scrap material.

Claims (1)

[Claims] 1. Cooperation between a plurality of first sectional dies attached to a first die and a plurality of second sectional dies attached to a second die that can be relatively moved toward and away from the first die. A blank material molding method using a blank mold for cutting a scrap portion from a plate-shaped material to form a blank material and cutting the scrap portion to form a small blank material according to the first die. And the second die are brought into relative proximity to each other, and the holding member attached to each of the first die and the second die holds the material under pressure, and is attached to the first die. By the cooperation of the first slit sectional die and the second slit sectional die attached to the second mold, the blank material portion and the front portion of the blank material held by the holding member are joined together. The step of forming a slit along the boundary line with the scrap portion, and the cooperation of the first flange sectional die attached to the first die and the second flange sectional die attached to the second die, The step of bending the slit to form the flange portion, and the cooperation of the first trim sectional die attached to the first die and the second trim sectional die attached to the second die, Trimming along the remaining portion of the boundary line, separating the scrap portion from the raw material to form a small blank material, a first small blank sectional die attached to the first mold, and the second Cooperate with the second small blank sectional die attached to the die to cut and process the scrap portion to form a small auxiliary blank material. And a step of,
The slide and the bolster are moved toward and away from each other 1
A blank material forming method for performing these steps during a stroke.