JPH0731850Y2 - Combined press machine - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of the Invention [0001] The present invention relates to a composite type press working apparatus that performs drawing, trimming, flange bending, and piercing in one step.

2. Description of the Related Art Press-molding an outer panel part of an automobile body, for example, a molded product represented by a door outer panel, is divided into a plurality of steps as shown in FIG.

Specifically, FIGS. 4 (A) and 4 (B) show changes in the cross section taken along line IV-IV of the door outer panel D shown in FIG.
First, a blank material Wa is draw-formed by a drawing apparatus M1 shown in FIG. 1A, and then the drawn product Wa is inverted, and then the trim-piercing press shown in FIG. The device is transferred to the device M2, and the non-product portion of the peripheral edge of the molded product Wa is trimmed as scrap S, and at the same time, a piercing hole P is formed in a predetermined portion with a piercing punch P. Then, the piercing-processed molded product Wa is transferred to the press device M3 for flange processing shown in the same figure, and the flange portion F is bent and formed on the peripheral edge of the molded product Wa (similar technology is, for example, “New Edition”).
Automotive Engineering Handbook (9th edition) ", Sho 58.5.31, published by Japan Society of Automotive Engineers, pp. 1-37. In this case, a double-action type press machine M1 is used as the draw forming machine, and single-action type press machines M2 and M3 for trim-piercing and flange bending are used.

Problems to be Solved by the Invention In the conventional press working method, as shown in FIG. 4, the trimming and the piercing are performed in one process. However, regarding the trim / piercing, the drawing and the flange bending, Since each process must be performed in a separate process, and thus the number of processing steps increases, an independent press machine is required for each process, which increases mold manufacturing costs and takes a lot of setup time. , It is disadvantageous in terms of cost.

The present invention has been made in view of the above points, and an object thereof is to provide a composite type in which four processes of drawing, trimming, piercing and flange bending can be performed in one process. It is to provide a press working apparatus.

Means for Solving the Problems The present invention is a composite type press working apparatus which is driven by a double action type press machine and performs each of drawing, trimming, flange bending and piercing in one step. A die, which is attached to the punch, a cushion pad that forms a lower mold together with the punch, and an outer slide, presses and holds a blank material in cooperation with the cushion pad, and then performs a drawing process in cooperation with the punch. And a trim / flanged punch that is elastically supported by the die and is driven by an inner slide to perform trim processing in cooperation with the punch and at the same time perform flange bending on the trimmed portion. And is elastically supported by the die so as to be vertically movable and driven by an inner slide, and cooperates with the punch to operate the pier. It is composed of a piercing punch that gives a finishing process.

Action According to this structure, the die descends together with the outer slide to press and hold the blank material between the die and the cushion pad, and the die and the cushion pad integrally descend under the press-and-hold state. The drawing process is performed in cooperation with the punch. When the drawing is completed, the die is in the bottom dead center or dwell state, and under this state, the trim and flange punches and the piercing punch driven by the inner slide descend. And trim
Trimming is performed by the cooperation of the flanging punch and the punch, and at the same time, flange bending is performed on the trimmed portion. Further, the piercing holes are processed by the cooperation of the piercing punches.

Embodiment FIG. 1 and FIG. 2 are views showing an embodiment of the present invention.
Is a bolster, 2 is an outer slide, and 3 is an inner slide. A punch 5 is fixed to the bolster 1 via a lower holder 4, and a cushion pad 7 forming a lower mold 6 together with the punch 5 is arranged on the outer periphery of the punch 5. As is well known, the cushion pad 7 is elastically supported by a die cushion device (not shown) via a cushion pin 8 and has a structure capable of moving up and down. Punch 5
A button die 9 corresponding to a piercing punch 17, which will be described later, is fixed thereto, and a groove portion 10 that controls trim processing and flange bending processing is formed therein. A stripper 11 that slides vertically in the groove 10 is fixed to the cushion pad 7, and as shown in FIG. And the punch face 5a and the holding surface of the cushion pad 7
It is set so that it is almost flush with 7a.

A die 13 is attached to the outer slide 2 via a riser plate 12.
Further, a supporting plate 15 is elastically supported on the die 13 so as to be vertically movable via an elastic body 19 such as a coil spring or urethane rubber. A spacer block 14 facing the inner slide 3 is provided on the upper surface of the support plate 15.
On the other hand, a piercing punch 17 held by a punch retainer 16 and a trim / flanging punch 18 for trimming and flange bending are integrally fixed to the lower surface of the support plate 15. At the tip of the trim / flanged punch 18, the cutting edge 18a for trim processing is attached.
And a flange processing portion 18b for flange bending processing.

According to the press working apparatus having such a structure, when the outer slide 2 is lowered from the state shown in FIG. 2, the die 13 first comes into contact with the blank material W and the peripheral portion of the blank material W is cooperated with the cushion pad 7. Hold under pressure. Then, the die 13 and the cushion pad 7 are integrally lowered under the above-described pressure-held state, whereby the punching is performed in cooperation with the punch 5. At this time, the support plate 15
Piercing punch 17 integrated with one, trim and flanged punch 1
8 and the like are pushed up by an elastic body 19 as shown in FIG.

When the drawing process is completed, the outer slide 2 is held at the bottom dead center position, that is, the dwell state, so that the die 13 and the cushion pad 7 are not displaced at all, and the inner slide 3 is lowered instead. When the inner slide 3 descends, the inner slide 3 contacts the spacer block 14 and pushes down the support plate 15. As a result, first, the tip of the trim / flanging punch 18 hits the blank material W, and as shown in FIG. 3, the non-product of the peripheral portion of the blank material (molded product) W is collaborated by the cutting edge 18a and the punch 5. The part is trimmed as scrap S. At the same time, the flange portion F is formed by flange bending (flange down) processing performed on the end portion of the just-trimmed blank material W side by cooperation of the flange processing portion 18b and the punch 5.

Before and after the completion of the flange bending process, the piercing punch 17 and the button die 9 mesh with each other to form a piercing hole H at a predetermined position of the blank material W, and the drawing, trimming, flange bending and All of the piercing process is completed.

When the inner slide 3 reaches the bottom dead center, the outer slide 2 which has been waiting in the dwell state until then rises together with the inner slide 3. At this time, the stripper 11 that has been pushed down into the groove 10 rises together with the cushion pad 7, and the stripper 11 contacts the tip of the flange F and pushes up the entire molded product (blank material) W from the punch 5 by a predetermined amount. become.

Effect of the Invention As described above, according to the press working apparatus of the present invention, four processes of drawing, trimming, piercing and flange bending can be performed in one process, so that the die manufacturing cost and the man-hours are significantly reduced. Can be achieved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the press working apparatus of the present invention when the upper die is lowered, FIG. 2 is a sectional view when the upper die is raised in FIG. 1, and FIG. 3 is the press working shown in FIG. FIG. 4 is a sectional view of a molded product molded by the apparatus, FIG. 4 is an explanatory view showing an example of a conventional press working method, and FIG. 5 is a perspective view of a door outer panel showing an example of the molded product. 2 …… Outer slide, 3 …… Inner slide, 5 ……
Punch, 6 …… Lower mold, 7 …… Cushion pad, 13 ……
Die, 17 ... piercing punch, 18 ... trim / flange punch, W ... blank material (molded product), F ... flange part, H ... piercing hole.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-270226 (JP, A) JP-A-56-119632 (JP, A) Actual flat 1-128911 (JP, U) Actual flat 2- 32319 (JP, U) Actual opening 60-160936 (JP, U) Actual opening 57-160840 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A composite press working apparatus which is driven by a double action type press machine and performs each of drawing, trimming, flange bending and piercing in a single step, together with a punch and a punch. A cushion pad that forms the lower mold and a die that is attached to the outer slide and holds the blank material under pressure in cooperation with the cushion pad and then performs drawing processing in cooperation with the punch, and the die can move up and down. It is elastically supported by the inner slide and is driven by the inner slide to perform trim processing in cooperation with the punch, and at the same time, the trim / flanged punch that performs flange bending processing on the trimmed portion and the die moves up and down. A piercing punch that is elastically supported as much as possible and that is driven by an inner slide to perform piercing in cooperation with the punch. By being composed of a composite type press working apparatus according to claim.