JPH10235438A - Press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a punch position regulating mechanism by energizing a punch and a regulating piece upward against a punch guide plate which is provided with a punch guide hole to guide the positioned regulating piece and the punch integrated therewith and is fixed to a lower side of a punch holder through a punch regulating plate. SOLUTION: A punch regulating plate 314 is inserted in a dove-tail groove 221C of a punch holder 311, the punch regulating plate 314 is moved by turning a punch regulating screw 227, and an inclined surface 226d is agreed with a punch guide hole 312a. A stripper plate 223 is separated from the punch holder 311, a punch 316 is integrated with a regulating piece 315, and inserted in the punch guide hole 312a from the lower side, a coil spring 318 is inserted in a recessed hole of the regulating piece 315, and a regulating piece supporting piece 317 is screwed and fixed to energize the punch 316 upward. The punch 316 together with the regulating piece 315 is movable in the vertical direction by moving the punch regulating plate 314 to easily regulate the punch position and change the punch.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a press forming machine used for bending a tongue piece formed on a metal plate to a predetermined size, and more particularly to a punch (also called a punch) required for bending forming. The present invention relates to a press molding machine which achieves simplification of a punch position adjustment mechanism and simplification of a punch replacement operation at the same time without lowering workability of a position adjustment operation to improve productivity.

In general, a press molding machine is equipped with a punch position adjusting mechanism in order to cope with a bending dimension of a target product or a punch abrasion during continuous molding. However, an increasingly strong product has a shorter delivery time and a lower price. A major issue is how to simplify the punch position adjusting mechanism and how to facilitate the punch replacement operation in order to cope with such a situation.

[0003]

2. Description of the Related Art FIG. 5 is a view for explaining an example of a forming step which is an object of the present invention, FIG. 6 is a view for explaining a conventional press forming machine together with a punch position adjusting mechanism, and FIG. 8 illustrates a punch adjusting plate as a component, FIG. 9 illustrates a punch adjusting screw as a component, and FIG. 10 illustrates an adjustment piece as a component. FIG. 11 is a diagram illustrating a punch as a component, and FIG. 12 is a diagram illustrating a state during press molding.

In FIG. 5, (5-1) shows a state before molding.
(5-2) is a diagram showing a state after molding. That is, the tongue piece 1 formed by a punching step (not shown) or the like is applied to the blank 1 ′ made of a metal plate before molding in (5-1) of FIG.
a 'is formed.

[0005] The tip of the tongue piece 1a 'is pressed to bend the tongue piece 1a' in the plate thickness direction, whereby the tongue piece 1a 'is pressed.
a 'can be the blank 1 having the tongue piece 1a shown in (5-2) in which the above-mentioned tip region is offset-bent with respect to the root.

FIG. 6 shows a press forming machine for realizing such a forming step, and is a cross-sectional view of the punch position adjusting mechanism region according to the present invention. That is, in FIG. 6, the press molding machine 2 comprises a fixed lower die 21 for positioning and placing the blank 1 'described in FIG. 5, and the lower die 21 in a normal state while maintaining a relative position with respect to the lower die 21. And an upper mold 22 that can move up and down with respect to

The inner and lower mold 21 includes a die holder 211 fixed to a base (not shown), a die plate 211 fixed to the upper surface of the die holder 211, and a die block 213 attached to the die plate 211. And a die 214 which is fixed through the die.

In this case, on the upper surface of the die 214,
A concave hole 214a where the tip region of the tongue piece 1a described with reference to FIG. 5 can be located is formed with a taper 214b extending upward at the periphery.

On the other hand, the upper mold 22 is a punch holder 221 which can move up and down with respect to the lower mold 21 by a mechanism not shown.
And a punch guide plate 222 fixed to the lower surface 221a of the punch holder 221; and the punch guide plate 222.
A stripper plate 223 that can move up and down in parallel with the punch holder 221 while being positioned below
And the punch holder 221 and the punch guide plate 2
22 and the stripper plate 223
4 and a punch position adjusting mechanism 224 that is mounted so as to penetrate vertically at a position corresponding to the punch position.

[0010] The stripper plate 223
In a normal state, the shaft 25 disposed between the punch holder 221 and the coil spring 26 surrounding the shaft 25 can move up and down elastically with respect to the punch holder 221 within a predetermined range. However, in an emergency state such as when a punch is to be replaced, which will be described later, the distance from the punch holder 221 is increased by a mechanism not shown.

On the other hand, the punch position adjusting mechanism 224 includes a punch holder 2 inserted into a through hole 221b formed at a position corresponding to the die 214 of the punch holder 221.
25, and a punch adjusting plate 22 that can reciprocate in the direction of the die 214 from the periphery of the holder along the lower surface by a dovetail groove 221c provided on the lower surface 221a of the punch holder 221.
6, a punch adjusting screw 227 mounted on the punch adjusting plate 226, a square punch guide hole 222a formed at a position corresponding to the through hole of the punch guide plate 222, for example.
The main body is an adjustment piece 228 and a punch 229 to be inserted into the punch, and the punch holding coil spring 27 attached to the punch holding tool 225 is a sub-component.

Here, in order to make the punch position adjusting mechanism 224 easy to understand, the main constituent members will be described first with reference to FIGS. In FIG. 7, the punch holder 225 is a screw head 225 having one end of a shaft 225a with a screw 225b and the other end with a flange.
c.

The above-described punch holding coil spring 27 as a sub-component is connected to the shaft 2 of the punch holding tool 225.
This is inserted into the area 25a. In FIG. 8 showing the punch adjusting plate, (8-1) is an entire perspective view and (8-
2) is a view of (8-1) viewed from the direction of arrow A.

That is, the punch adjustment plate 226, which is T-shaped when viewed from the direction of arrow B in FIG. 8, has a leg wall 226b whose main surface 226a projects to one side of the main surface substantially on the center line in the longitudinal direction. It is equipped.

The main surface 226a is formed on the punch holder 221 on both sides in the longitudinal direction.
It is formed on a dovetail 226c that fits with 21c, and is formed on an inclined surface 226d with an angle α such that the surface on the side of the leg wall near one end in the longitudinal direction becomes thinner toward the tip.

An elliptical hole 226e extending in the longitudinal direction with a width that allows the shaft 225a of the punch holder 225 to pass therethrough is formed in the inclined surface forming region. The above leg wall 2
26b has a through hole 226f formed substantially in the center area.

Then, the punch adjusting plate 226 is
c, the region of the elliptical hole 226e is set in the punch holder 221, when the punch holder 22 is attached to the punch holder 221.
One of the above-described through holes 221b is located.

In FIG. 9, the punch adjusting screw 227 is provided between the head 227a and the screw 227b.
The shaft portion 227c having a thickness to be fitted into the through hole 226f of No. 6 is formed with a groove 227d surrounding the shaft portion.

After the punch adjusting screw 227 is inserted into the punch adjusting plate 226 described with reference to FIG.
By fitting a C ring 28 or the like corresponding to 27d into the groove 227d, it can be rotatably mounted on the punch adjustment plate 226.

In this case, the punch adjusting screw 227 is used.
When the punch adjustment plate 226 is mounted on the punch holder 221, the punch adjustment plate 226 is fitted with a female screw 222 b formed at a position corresponding to the punch adjustment screw on the punch guide plate 222.

Therefore, with the punch adjusting plate 226 mounted on the punch holder 221, the punch adjusting screw 2
By rotating 27, the punch adjustment plate 226 can be moved along the groove 221c.

In FIG. 10 for explaining the adjustment piece, (10-1)
Is a whole perspective view, and (10-2) is a sectional view taken along arrows C-C '. In the figure, the adjustment piece 228 has an outer shape that can be fitted into the punch guide hole 222a described in FIG. 6, and one side thereof has an inclination angle α corresponding to the inclined surface 226d of the punch adjustment plate 226 described in FIG. It is formed on the surface 228a.

When the adjustment piece 228 is fitted into the punch guide hole 222a, the punch holder 22
At a position corresponding to the first through hole 221b, a through hole 228b having a diameter capable of fitting the shaft 225a of the punch holder 225 described with reference to FIG. 7 is formed.

In FIG. 11 further explaining the punch, (11-
1) is an overall perspective view, and (11-2) is a sectional view taken along arrows D to D '. In the drawing, the punch 229 is a guide portion 229a that can be fitted into the punch guide hole 222a described in FIG.
The punch head 229b of a required size is formed at an end of the punch head 229b.

When the punch 229 is fitted into the punch guide hole 222a, the punch holder 22
A female screw 229c corresponding to the screw 225b of the punch holder 225 described with reference to FIG. 7 is formed at a position corresponding to the first through hole 221b.

Accordingly, when the punch 229 and the adjustment piece 228 are fitted into the punch guide hole 222a, the female screw 229c of the punch 229 and the through hole 22 of the adjustment piece 228 are fitted.
8b is aligned with the center line of the adjustment piece 2b.
The punch holder 225 having the through hole 28 can be screwed to the punch 229.

Therefore, first, a punch adjusting plate 226 having a punch adjusting screw 227 is mounted in the dovetail groove 221c of the punch holder 221 in FIG. The hole 226e is aligned with the through hole 221b of the punch holder 221.

Next, with the stripper plate 223 separated from the punch holder 221 as in the above-described emergency state, the adjustment piece 228 and the punch are inserted into the punch guide hole 222a of the punch guide plate 222 from below. 229
Are sequentially fitted.

Then, in the lower opening area of the through hole 221b of the punch holder 221, a plate-like spring holding plate 29 having a hole 29a through which the shaft 225a of the punch holder 225 can pass is inserted, for example, from the lateral direction. Insert and attach by equal means.

Further, the punch holding tool 225 with the punch holding coil spring 27 interposed is connected to the punch 225b from the screw 225b side.
The screw 225 is inserted into the through hole 221b of the holder 221 and
b is screwed into the punch 229 to form the upper mold 2 shown in FIG.
2 can be configured as shown.

In the upper die 22, the punch 229 presses the inclined surface 226d of the punch adjusting plate 226 via the adjusting piece 228 by the punch holding coil spring 27 whose one end is supported by the above-described spring pressing plate 29. .

The punch 229 can be moved up and down together with the adjustment piece 228 by the movement of the punch adjustment plate 226 caused by the rotation of the punch adjustment screw 227. In FIG. 12 illustrating a state at the time of press molding, (12-1) shows a state before molding, and (12-2) shows a state after molding.

That is, at (12-1) in the figure, the blank 1 'described with reference to FIG. Then, when the upper mold 22 is lowered by a mechanism (not shown), first, the stripper plate 223 is moved to the blank 1 '.
Is pressed against the surface of the lower mold, and the punch holder 221 is further moved down by the lowering of the upper mold 22 so that the punch guide plate 2
22, the punch 229 relatively lowers with respect to the stripper plate 223.

Therefore, as a result, as shown in (12-2),
Since the punch head 229b of the punch 229 presses only the tongue piece 1a 'of the blank 1', (5-
As described in 2), the tongue piece 1a that is bent by offset can be obtained.

In the upper die 22 having such a punch position adjusting mechanism 224, the vertical position adjustment of the punch 229 can be realized by the rotation of the punch adjusting screw 227 shown in FIG. 6, and the replacement of the punch 229 is performed by the punch holding. There is an advantage that can be realized only by attaching and detaching the tool 225.

[0036]

However, in the upper die having the above-described punch position adjusting mechanism, there are many main components constituting the punch position adjusting mechanism, a through hole is provided in the punch holder, or a female screw is provided in the punch. There is a problem that it is not possible to expect an improvement in productivity due to the large number of man-hours required in the manufacturing process, and a problem that a large amount of man-hour is required to replace the punch and no improvement in workability can be expected. there were.

[0037]

The above object is achieved by a lower die having a die disposed on the upper surface and an upper die having a punch disposed at a position corresponding to the die and positioned above the lower die. A press forming machine having a punch position adjusting mechanism on a lower surface of a punch holder in which a mold moves up and down with respect to the lower die, wherein the punch position adjusting mechanism is gradually thicker from a tip on a lower surface side of a tip region. A punch adjusting plate having moving means capable of moving along the lower surface of the punch holder having an inclined surface, an adjusting piece having an upper end surface formed on an inclined surface corresponding to the inclined surface, A punch provided with engaging means capable of positioning the adjustment piece by contacting the adjustment piece with the inclined side wall surface;
A punch guide plate having a punch guide hole that guides the positioned adjustment piece and the punch so as to be vertically movable in an integrated state and fixed to the lower surface of the punch holder via the punch adjustment plate Push-up biasing means for constantly biasing the punch and the adjustment piece guided by the punch guide hole upward with respect to the punch guide plate;
Is solved by a press molding machine comprising:

A punch position adjusting mechanism is configured such that an adjustment piece having a punch detachably positioned is mounted on a punch guide plate so as to be able to move up and down together with the punch, and the adjustment piece is moved up and down by the punch adjustment plate described above. The punch position adjusting mechanism can be positioned only in the area of the punch guide plate and the stripper plate.

Therefore, according to the present invention, the adjusting piece in which the punch is removably positioned by fitting the concave part and the convex part is mounted on the punch guide plate while being urged upward by the coil spring, and The punch position adjusting mechanism is configured to be able to move up and down by the movement of the punch adjusting plate described with reference to FIG.

This means that the punch position adjusting mechanism and the punch holder can be prevented from being engaged with each other. Therefore, a through hole provided in the punch holder, a punch holding tool associated with the through hole, a punch holding coil spring, and the like. This shows that the spring holding plate and the like can be eliminated.

Accordingly, simplification of the punch position adjusting mechanism and simplification of the punch exchanging operation can be simultaneously realized without deteriorating the workability of the punch position adjusting operation.

[0042]

FIG. 1 is a diagram for explaining a press molding machine of the present invention together with a punch position adjusting mechanism, FIG. 2 is a diagram for explaining a punch adjusting plate as a component, and FIG. 3 is a diagram as a component. FIG. 4 is a diagram illustrating an adjustment piece, and FIG. 4 is a diagram illustrating a punch as a component.

In the drawings, the case where the present invention is applied to the press molding machine described with reference to FIG. 6 is used as an example. Therefore, the same reference numerals are given to the same target members and parts as in FIG. 6, and overlapping descriptions are omitted. I do.

FIG. 1 is a cross-sectional view of a press molding machine according to the present invention, similarly to FIG. 6. In FIG. 1, the press molding machine 3 maintains the lower mold 21 described with reference to FIG. In the normal state, the upper mold 31 is configured to move up and down within a predetermined range with respect to the lower mold 21.

In particular, in this case, the upper die 31 includes a punch holder 311 which can move up and down with respect to the lower die 21 by a mechanism not shown, and a lower surface 22 of the punch holder 311.
1a, a punch guide plate 312,
It comprises a stripper plate 223 that can move up and down in parallel with the punch holder 311 while being located below the guide plate 312, and a punch position adjusting mechanism 313 according to the present invention.

The punch holder 311 is shown in FIG.
In this embodiment, only the through hole 221b is eliminated from the punch holder 221 described in the above. In addition, punch guide plate 312
In FIG. 6, a square punch guide hole 222a in the punch guide plate 222 described with reference to FIG. 6 is changed to a punch guide hole 312a in which only the method in the punch thickness direction is enlarged.

On the other hand, the punch position adjusting mechanism 3 according to the present invention
Reference numeral 13 denotes a punch adjustment plate 314 that can reciprocate along the lower surface of the punch holder 311 along a dovetail groove 221c provided on the lower surface 221a, a punch adjustment screw 227 mounted on the punch adjustment plate 314, Adjustment piece 31 inserted into square punch guide hole 312a of guide plate 312
5, a punch 316, and an adjustment piece support 31 which is screwed and fixed to the punch guide plate 312 in the vicinity of the punch guide hole.
7, and a coil spring 318 inserted into the adjustment piece to constantly urge the adjustment piece 315 upward.

Here, in order to facilitate understanding of the punch position adjusting mechanism 313, the above-mentioned constituent members will be described first with reference to FIGS. FIG. 2 shows a punch adjustment plate according to the present invention,
1) is an overall perspective view, and (2-2) is a view of (2-1) viewed from the direction of arrow A.

That is, FIG. 2 shows the punch adjusting plate 3 in this case.
Numeral 14 is the same as the punch adjusting plate 226 described in FIG. 8 except that only the elliptical hole 226 e in the punch adjusting plate 226 is eliminated.

In FIG. 3 for explaining the adjustment pieces, (3-1)
Is an overall perspective view, and (3-2) is a sectional view taken along arrows C-C '. The adjustment piece 315 in this case, which is substantially F-shaped when viewed from the direction of the arrow E in the figure, has a top surface corresponding to the head of the adjustment piece 228 described with reference to FIG. The inclined surface 315a is formed on the inclined surface 315a.
The guide plate 312 is formed in such a size as to smoothly fit into the punch / guide hole 312a.

The linear projection 31 having a rectangular cross section is formed in the width direction of the inner surface of the side wall 315b following the lower region of the inclined surface 315a.
5c is formed, and a concave hole 315e for inserting a coil spring having an opening at the lower surface 315d is formed substantially at the center of the region of the side wall 315b.

In FIG. 4 for explaining the punch, (4-1)
Is a whole perspective view and (4-2) is a sectional view taken along arrows D-D '. In the figure, the punch 316 has a concave groove 316b on one side 316a that fits into the linear projection 315c of the adjustment piece 315 described with reference to FIG. The rear surface 316 c is in contact with the adjustment piece 315 and the rear
5 and the punch guide hole 31 in alignment with the front surface 315f.
A guide portion that fits smoothly with the guide 2a is formed.

At a position corresponding to the punch head 229b on the punch 229 below the punch 316 in the drawing, a punch head 229b equal to the punch head is provided.
Are formed.

Therefore, the adjustment piece 315 and the punch 316
In the state in which the adjustment piece and the punch are brought into contact with each other as described above, the adjustment piece and the punch can be moved up and down by the punch guide hole 312a in an integrated state.

Therefore, first, the punch adjusting plate 314 having the punch adjusting screw 227 described with reference to FIG. 9 is inserted into the dovetail groove 221c of the punch holder 311 in FIG. 1, and the punch is adjusted by rotating the punch adjusting screw 227. With the movement of the plate 314, the inclined surface 226d of the punch adjustment plate 314
To the punch guide hole 312a of the punch guide plate 312.

Next, with the stripper plate 223 separated from the punch holder 311 as in the above-described emergency state, the adjustment piece 315 integrated as described above is used.
And the punch 316 are inserted into the punch guide hole 312a of the punch guide plate 312 from below, and the above-described coil spring 318 is inserted into the concave hole 315e of the adjustment piece 315.

Subsequently, the above-mentioned plate-like adjusting piece supporter 317 is screwed and fixed in the vicinity of the concave hole 315e around the punch guide hole 312a, whereby the upper die 31 of FIG. 1 is configured as shown in the figure. can do.

In the upper die 31, the adjustment piece 31 described above is used.
5 is urged upward by a coil spring 318 inserted into the concave hole 315e.
Indicate that the punch 316 engaged by the linear projection 315c is pushed upward together with the adjustment piece 315 to be urged.

Therefore, the punch 316 can be moved up and down together with the adjustment piece 315 by the movement of the punch adjustment plate 314 caused by the rotation of the punch adjustment screw 227. Therefore, as described below with reference to FIG.
By placing the blank 1 'described in (1) and lowering the upper die 31 by a mechanism (not shown), the tongue piece 1a offset and bent as described in FIG. 5 is obtained as in the case of FIG. .

In the upper die 31 having the punch position adjusting mechanism 313, simplification of the punch position adjusting mechanism and simplification of the punch exchanging operation can be realized at the same time without lowering the workability of the punch position adjusting operation as compared with the conventional case. There are benefits.

[0061]

As described above, according to the present invention, simplification of the punch position adjustment mechanism and simplification of the punch replacement operation can be realized at the same time without lowering the workability of the punch position adjustment work required for bending, thereby improving productivity. An improved press forming machine can be provided.

In the description of the present invention, the positioning of the adjusting piece 315 and the punch 316 constituting the punch position adjusting mechanism is performed by positioning the linear projection 315c provided on the adjusting piece 315 and the punch 31.
6 is realized by fitting with the concave groove 316b provided in the same. However, even if the fitting is realized by other means such as a plurality of circular projections and a concave hole fitted with each circular projection, the same is achieved. It is clear that the effect of (1) is obtained.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a press molding machine of the present invention together with a punch position adjusting mechanism.

FIG. 2 is a diagram illustrating a punch adjustment plate as a component.

FIG. 3 is a diagram illustrating an adjustment piece as a component.

FIG. 4 is a diagram illustrating a punch as a component.

FIG. 5 is a view for explaining an example of a molding step targeted by the present invention.

FIG. 6 is a diagram illustrating a conventional press molding machine together with a punch position adjusting mechanism.

FIG. 7 is a diagram illustrating a punch holder as a component.

FIG. 8 is a diagram illustrating a punch adjusting plate as a component.

FIG. 9 is a view for explaining a punch adjusting screw as a component.

FIG. 10 is a diagram illustrating an adjustment piece as a component.

FIG. 11 is a diagram illustrating a punch as a component.

FIG. 12 is a diagram illustrating a state during press molding.

[Explanation of symbols]

 3 Press Molding Machine 21 Lower Die 31 Upper Die 221a Lower Surface 221c Groove 226d Inclined Surface 223 Stripper Plate 227 Punch Adjustment Screw 229b Punch Head 311 Punch Holder 312 Punch Guide Plate 312a Punch Guide Hole 313 Punch Position Adjusting Mechanism 314 Punch Adjustment plate 315 Adjustment piece 315a Inclined surface 315b Side wall 315c Linear protrusion 315d Lower surface 315e Concave hole 315f Front surface 316 Punch 316a Single surface 316b Concave groove 316c Back surface 317 Adjustment member support 318 Coil spring

Claims (4)

[Claims] 1. A lower die having a die disposed on an upper surface thereof and an upper die having a punch disposed at a position corresponding to the die and being positioned above the lower die. A press forming machine comprising a punch position adjusting mechanism on a lower surface of a punch holder that moves up and down, wherein the punch position adjusting mechanism has an inclined surface gradually increasing from a tip on a lower surface side of a tip region. A punch adjusting plate having moving means that can move along the lower surface of the punch holder; an adjusting piece having an upper end surface formed on an inclined surface corresponding to the inclined surface; A punch provided with an engagement means capable of positioning the adjustment piece in contact with the punch, and a punch guide hole for guiding the positioned adjustment piece and the punch in a vertically movable manner in an integrated state. The punch and the e are inserted through a punch adjusting plate. A punch guide plate fixed to the lower surface of the die, and push-up biasing means for constantly biasing the punch and the adjustment piece guided by the punch guide hole upward with respect to the punch guide plate. A press molding machine characterized by the above-mentioned. 2. A punch adjusting screw fixed to a leg wall formed in a width direction orthogonal to an inclined direction of a lower surface excluding an inclined surface of the punch adjusting plate, the moving means according to claim 1, and the punch guide plate. And a female screw provided at a position corresponding to the punch adjusting screw. 3. A linear projection formed in a width direction orthogonal to an inclination direction of an inclination side wall of the adjustment piece, and a concave formed in a position corresponding to the linear projection of the punch. A press molding machine characterized by being fitted with a groove. 4. A push-up biasing means according to claim 1, wherein said push-up biasing means is fixed to said punch guide plate so as to cover a coil spring provided in a recess provided in a lower surface of said adjustment piece and an opening of said recess. A press molding machine characterized by comprising an adjustment piece support.