JPS617024A - Method and apparatus for manufacturing front pillar or the like of automobile - Google Patents

Abstract

PURPOSE:To minimize blanking processes in outer periphery blanking of a drawn work and collecting hole blanking, by blanking the collecting holes by an upper die oblique punch, and at the same time, making an upper cutting edge for blanking lower periphery solid wedge-shaped sectional form, and blanking the two simultaneously. CONSTITUTION:A drawn work 8 placed on the cutting edge 9 having a copying form of a lower die 2 is fixed by an energizing pad 16 having added spring 16 by descent of an upper die 3. The periphery of the work 8 is blanked by a lowered cutting edge 15. At the same time, a receiving cam 18 attached and energized by a spring 22 to a slanted slide base 17 of the elongated part 13 of the upper die 3 is moved obliquely by pressure of an oblique cam mechanism 5 of the lower die, and blanks the collecting holes by a punch for collecting hole. The upper cutting edge 15 under a notch 14 for passing the punch 6 for collecting hole of the upper die 3 has a solid wedge-shaped sectional form and endures repeated use. Desired blanking can be made nicely by one stroke, and blanking processes can be minimized.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a front pillar of an automobile and a replica thereof.

(Conventional Technique) Conventionally, a workpiece with a complicated structure, such as the front pillar of an automobile, was formed or processed using a press machine.
This is done through multiple molding processes. In order to carry out the molding process, the molds designed for each molding process are distributed to a slow molding line with multiple press machines, and the entire work piece is sequentially passed through a press machine to form and process it. It is something to do. In these forming processes, the operating directions of the processed parts for outer periphery punching and offset hole punching are different from the longitudinal and lateral directions, so the outer periphery punching and eccentric hole punching for areas close to the outer periphery are necessary. If the same process is used for the same process, the cutting edge near where the cross-hole punch passes must have a flat cross-sectional shape due to timing considerations, but the cutting edge in this state has no durability at all. Therefore, it could not be processed without dividing it into two processes.

By the way, today, various industries are calling for energy saving, but in the press industry too, each forming process needs to be reviewed, and there is a desire to reduce the number of forming processes. . This is because if even one process can be shortened or omitted, an expensive processing mold can be made for one process, which delays cost reduction and allows for the entire production time to be planned.

(Problems to be Solved by the Invention) According to the present invention, the process of punching out the outer peripheral edge and the process of punching out the cross-holes in a portion close to the outer peripheral edge are performed in the same process, and Since the punch for punching is displaced obliquely upward relative to the workpiece as the upper die is lowered, the cross-sectional shape of the cutting edge for cutting the outer peripheral edge adjacent to the punch for punching the center hole is It can be formed with a thick displacement, and it can give the cutting edge a g1 degree that can withstand anti-AT use. This allows for the processing of punching the outer periphery and the processing of punching holes in the vicinity of the outer periphery. The present invention provides a method for installing blue front pillars at the same time and a device therefor.

(Means for Solving All Problems) In order to achieve the above-mentioned purpose, the present invention provides a process for manufacturing automobile front pillars, etc., in which the outer periphery of the workpiece is removed. If you punch out the joint VC
Manufacture of automobile front pillars, etc., in which all through-holes are drilled diagonally upward in a wall that stands up close to the outer periphery of the workpiece, and then sent to the next process. and a lower die is provided with an upper ffi' that can be freely lowered, the core upper die and the lower die are each provided with a cutting blade for punching the outer periphery of the workpiece to be reloaded on the lower die, and the upper die is As the upper die is lowered, a punch for punching holes is provided so as to be displaced diagonally from upward to downward between the walls that rise close to the outer periphery of the workpiece. 〃・The punch is designed to pass through the upper part of the wedge-shaped cross section of the upper cutting edge for handling the outer periphery of the workpiece. This is a press processing device for rolling.

With the above configuration, punching around the gate of the workpiece,
It is possible to simultaneously drill a horizontal hole in a portion rising above the workpiece, close to the outer peripheral edge to be punched. This is because when the outer peripheral edge and the horizontal hole are close to each other, it is processed in one process, so if the punch is configured to move from the entire horizontal direction, the thickness of the upper die cutting edge will be extremely thin, so it will be difficult to actually Although this becomes a useless device and is difficult to integrate into one process, if the punch is configured to be displaced diagonally upward toward the top of the workpiece, the upper cutting edge will have a wedge-shaped cross-section. As a result, the upper die cutting edge became strong and could withstand punching, and a one-step process was realized.

(Example) Hereinafter, an embodiment of the present invention will be explained with reference to the drawings regarding the molding process of a front pillar for an automobile.

FIG. 1 shows a press processing apparatus according to the present invention, and the press apparatus is omitted from illustration. The processing mold 1 is a lower mold 2,
It is roughly composed of an upper mold 3, a pad 4, a cam mechanism 5, and a bunch 6 for punch holes.

The lower die 2 is fixed to, for example, a holster, and its upper end surface is attached to the workpiece 8 (sixth
(see Fig. 7) is shaped in a predetermined manner so that the
A lower die cutting blade 9 is provided on its upper end surface. The corresponding position of the lower mold 2 for punching the hole, for example, the door check hole 10
(See Figure 8) A through hole 11 for scrap discharge is opened at the position corresponding to the punching, and this through hole '1
1 is the discharge chute (F@ shown). I'm worried.

The upper die 3 is fixed to a press ram (not shown) that is vertically displaceable above the lower die 2, and the upper die 3 has a hole 12 facing downward corresponding to the lower die cutting edge 9. It is open. An upper cutting edge 15 is provided around the hole.

An extending portion 13 is provided on the side wall of the shed 3, and the seventh extending portion 13 extends away from the hole 12 from the top to the bottom. A notch 14 is formed in the side wall of the upper mold 3 below the extension 13, and the notch 14 penetrates into the hole 12 from the outside. Cut x 1
The downward direction of 4 is inclined about 1 toward the hole 12, and the slope of the edge of 4 forms the upper part of the upper die cutting edge 15. The upper die cutting blade 15 and the lower die cutting edge 9 work together to punch out the outer peripheral edge of the workpiece 8 placed on the lower die 2. Particularly, below the cutting edge 14, the shed cutting edge 15 formed on the upper die 3 is formed into a wedge-shaped cross section that becomes thicker as it moves away from the hole 12. By having such a shape, the strength of the cutting edge during punching is ensured.

A pad 4 is provided within the hole 12. This pad 4
is held on the upper mold 3 through the entire spring 16, and the upper m,
When the pad 3 is spaced one space above the lower mold 2, the pad 4
The lower end surface is located at approximately the same position as the lower end of the upper mold 3, or slightly protrudes from the lower end of the upper mold 3 toward the lower blade.

The lower end surface of this rod 4 has a shape and shape corresponding to the lower end direction of the lower mold 2, and the workpiece 8 can be pressed and held by the tip surface of this rod 4 and the lower end direction of the lower mold 2. It will be done.

A cam mechanism 5-piece slide base 17, a passive cam 18,
It consists of a cam bottom 19. The slide base 17 is fixed to the extension part 13, and its lower end surface extends in the same direction as the extension part 13. The passive cam 18 is attached to the extending portion 1 so that its upper end surface is in sliding contact with the lower end surface of the slide base 17.
The passive cam 18 is held by a pair of guides 20 fixed to the extension part 13 (see Fig. 3), and the displacement of the passive cam 18 beyond a predetermined value is regulated by a stopper 21 attached to the end of the extension part 13. . A spring 22 is interposed between the driven cam 18 and the upper mold 3, and the driven cam 18 is biased toward the stopper 21 by the spring 22.

The lower end of the passive cam 1a is slanted so as to approach the lower mold 2 from the top to the bottom, and a four-striped groove 23 is provided on the lower end surface thereof extending in the same direction as the direction in which the lower end surface fills. f
(See FIG. 5) A pair of protrusions 24 are provided at the lower end of the passive cam 18 and project in a direction perpendicular to the direction in which the lower end surface of the passive cam 18 is filled.

The cam bottom 19 is fixed to the lower mold 2 below the passive cam 18. A protrusion 19a is formed on the upper end surface of the cam bottom 19 in correspondence with the groove 23 of the passive cam 18, and the protrusion 19id extends in the same direction as the groove 23. There is. The cam bottom 19 has
A pair of guides 25 are attached to guide the protrusion 24, and the functions and functions of the pair of guides 25 will be described later.

The bunch 6 for shifting is composed of a base portion 27 and a light end portion 28 having a diameter smaller than that of the base portion 27.1. Its base 27 is attached to the distal end side of the passive cam 18 (lower mold 2 side in FIG. 1), and its distal end 28 passes through the slit 14 and faces the hole 12. The tip portion 28 is made of polyurethane rubber, etc. (the tip portion 29 is attached with a VC around it), and when no blade is acting on the tip portion 29, The tip end surface of the punch stop collar 29 protrudes from the tip end surface toward the lower mold 2 side.

Next, the effect will be explained.

In order to form the front pillar, first, the material is formed into a workpiece 8 of a predetermined shape using a processing die in several steps (see Fig. 6), and the workpiece 8 that has undergone the drawing process is passed through the lower mold 2.
Place it on. As shown in FIG. 7, the workpiece 8 is more tl-15 to tl-15 than the conventional workpiece 8' in several steps.
The workpiece 8 is narrowed deeply by 201tIR, and the back surface 8& of the workpiece 8 is tilted deeply by θ-20 to 30”.

When the workpiece 8 is completely placed on the lower mold 2, the upper mold 3 is lowered.

Along with this, the pad 4 and the passive cam 18 are lowered, and the pad 4 and the lower mold 2 cooperate to hold the workpiece 8, and the passive cam 18 comes into contact with the cam bottom 19 (see Fig. 1). . At this time, the protrusion 24 of the passive cam 18 is not yet engaged with the pair of guides 25.

The upper part 3 further descends, but the upper mold 3 only moves down by fully pressing the spring 16, and the pad 4 does not displace while pressing the work 8. - 10,000, extension part 13 as the upper mold 3 descends
Since the passive cam 18 is pushed downward, the cam bottom 1
The passive cam 18 and punch 28 guided by the passive cam 18 and the punch 28 are displaced diagonally from above toward a portion rising above the compacted workpiece 8 placed on the lower mold 2, and the protrusion 24 of the passive cam 18 Since it is engaged with a pair of guides 25, as the passive cam 18 is displaced toward the workpiece 8, the bunching hole circumferential bunch 26 is used to pull out the matching hole at a predetermined position of the workpiece 8, that is, to open the door check hole lO. The punching is reliably performed with a small stroke, and the scrap of the workpiece 8 resulting from the punching of the cross-hole is guided through the through hole 11 to the discharge chute. At this time, the upper mold cutting blade 15 provided on the upper mold 3 and the lower mold cutting blade 9 provided on the lower mold 2
The outer peripheral edge of the workpiece 8 is cut out in a predetermined shape (see FIG. 2).

When the outer peripheral edge punching and the punching hole punching of the workpiece 8 are completed, the upper mold 3 starts to rise, but at this time, the protrusion 2 of the passive cam 18
4 is secured to a pair of guides 25, and the passive cam 1
8 is urged toward the stopper 21 by the spring 22, as the upper mold 3 rises, the passive cam 18 is guided by the cam bottom 19 and slides on the cam bottom 19. When the passive cam 18 slides until the protrusion 14 of the passive cam 18 and the pair of guides 25 are completely released, the bunch 26 around the centering hole will move out of the through hole 11, and from this point on,
As the upper die 3 rises, the passive force A18 and the pull/hole circumferential bunch 26 rise. At this time, passive cam 1
8 is in contact with the stopper 21 due to the bias of the spring 22. Then, as shown in FIGS. 8 and 9, the work 8#-, which has been subjected to the outer peripheral edge punching and the burr hole punching, is taken out from the lower mold 2 and transferred to the next step, the closing step.

In the spine process, the workpiece 8 is formed by the associated processing die as shown in FIG. 10, and the entire process is completed. In this way, conventionally, the outer peripheral edge of the workpiece 8 is removed.

The punching and punching of holes were each done in separate processes, and since the punch was installed in the lower die, the entire process took four steps.
However, in this example, the total number of steps is reduced to three.

Above - Examples have been explained, but in the case of non-inventions,
The present invention is not limited to the front pillar molding process, but may be applied to other molding processes.

(Effects) As described above, the present invention is provided so that the punch is lowered diagonally with respect to the wall surface that rises close to the outer periphery of the workpiece as the upper die is lowered. In addition, since the upper die cutting edge is provided below the punch with a concave cross section, the distance between punching the outer periphery and punching holes in the raised part of the workpiece is close to each other. However, it can be processed by one operation of the press machine. For this reason, it is possible to simultaneously punch the outer periphery of the workpiece and punch holes.
The total number of conventional molding processes can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing a processing die according to the present invention, Fig. 2 is an operating state diagram of Fig. 1, Fig. 3 is a sectional view taken along line A-A of Fig. 2, and Fig. 4 is a diagram of Fig. 2. Figure 5 is a cross-sectional view taken along line E-C of Figure 2, Figure 6 is an enlarged perspective view showing the entire workpiece after the drawing process in forming the front pillar, Figure 7 is Figure 6. FIG. 8 is an enlarged perspective view showing a workpiece processed by the processing die according to the present invention. FIG. 9 is a perspective view seen from the E direction of FIG. 8, and FIG. 10 is an enlarged perspective view showing the workpiece that has undergone the recess and recess process. 1...Processing die 2...Lower die 3...Upper die
5...Cam mechanism 6...Yosekazuki punch
8...Work patent applicant Takatsu Seisakusho Co., Ltd. Agent Patent attorney Kagumi Sae (1v x 1 person) 21
figure! 2 Figure 3 Figure 4 Figure q 26 Figure off Figure 8 a

Claims (2)

[Claims] (1) In the process of manufacturing automobile front pillars, etc., the outer periphery of the workpiece after the drawing process is punched out, and the wall surface that rises close to the outer periphery of the workpiece is punched diagonally from above. 1. A method for manufacturing automobile front pillars, etc., characterized in that a through-hole is bored by punching a through-hole, and then sent to the next process. (2) An upper part is provided so as to be freely lowerable relative to the lower mold, and a cutting blade for punching the outer peripheral edge of the workpiece placed on the lower mold is provided in the upper part and the lower part, respectively. A punch for punching holes is provided so as to be displaced diagonally upward to downward against a wall surface that rises close to the outer periphery of the workpiece as the workpiece is lowered, and the punch is located near the outer periphery of the workpiece 1. A press processing device for processing automobile front pillars, etc., characterized in that the upper die cutting blade is provided to pass through the upper part of a portion having a wedge-shaped cross section.