JPH03216229A - Press die for special shape - Google Patents

Abstract

PURPOSE:To form in even surface of desired shape, and to prevent buckling from being generated by providing a press part having an outer shape expanding in the width direction of a metal plate on a press die for a special shape. CONSTITUTION:In the press die for forming the special shape from the metal plate, press parts 17, 18 having an outer shape expanding to both sides in the width direction 1 of the metal plate as the metal plate advances to the downstream side of the feeding direction are provided on a mounting member 15. A recessed surface and a projecting surface corresponding to the special shape obtained by the press are formed on the presses 17, 18. In this way, the metal plate is press-formed slowly from the center in the width direction toward both sides of it, as a result, the special shape free from buckling and excellent in quality can be manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a press mold for a profiled material for producing a profiled material having different thicknesses in the width direction by press molding.

[Prior Art] A conventional press mold for a deformed material will be explained with reference to FIGS. 11 and 12.

For example, as shown in FIG. 12, a board 2 having a rectangular cross section in the width direction 1 has a recess 4 extending in the longitudinal direction 3 at the center of the width direction 1 on one side, and longitudinal force is applied to both sides of the recess 4 in the width direction 1. Direction 3
When press-forming a profiled material B having a flat part 5 extending to , as shown in FIG. A mold 9 having a substantially rectangular external shape and having flat portions 8 extending in the longitudinal direction 3 on both sides of the width direction 1 of the mold 7, and a mold having a rectangular external shape having only flat portions 10 on the pressing surface as shown in FIG. type l
1, and the molds 9.11 were set in a press device (not shown) so as to be able to approach and separate from each other, and the plate material 2 was pressed while being fed between both molds 9.11.

[Problems to be Solved by the Invention] However, in the conventional press mold for irregularly shaped materials, the mold 9 having the convex portion 7 extending in the longitudinal direction 3 and the flat portion 8 forms the concave portion 4 and the flat portion on one side of the plate material 2. Since the portion 5 was press-molded at one time, the following problems occurred.

In other words, when the plate material 2 is pressed by the mold 9.11, if it tries to extend toward both sides in the width direction 1, or if the entire width direction 1 is restrained by the mold 9.11, the thickness decreases. The central concave portion 4, which has a large amount of extension L2 in the width direction 1, is prevented from extending in the width direction L by the portions of the flat portions 5 on both sides, which have a small thickness reduction and a small extension ffil3 in the width direction 1. Therefore, the recess 4 cannot extend in the width direction 1 but tends to extend in the longitudinal direction 3.

However, since the concave portion 4 is also restrained by the molds 9 and 11 in the longitudinal direction 3, it cannot extend uniformly in the longitudinal direction 3, and as a result, the deformed material 6 formed by press molding
As shown in FIG. 13, in the recess 4 at the center of the
Ripples or buckling 14 occur due to non-uniform elongation in the longitudinal force direction 3, and the quality of the profiled material 6 is significantly degraded.

In view of the above-mentioned circumstances, the present invention prevents the occurrence of buckling and makes it possible to press-form a high-quality deformed material.
The object of the present invention is to provide a press mold for a deformed material.

[Means for Solving the Problems] The present invention provides a mounting member with a press portion having an outer shape that expands to both sides in the width direction of the plate material as it goes downstream in the feed direction of the plate material, and the press portion has a press part that is formed by pressing. The present invention relates to a press mold for a shaped material, which is characterized by forming a concave surface or a convex surface depending on the shape of the shaped material.

[Function] Since the press part has an external shape that expands to both sides in the width direction of the plate material as it goes downstream in the feed direction of the plate material, the press forming of the plate material gradually progresses from the center in the width direction to both sides. Therefore, the extension of the plate material in the width direction per press is kept small.

Moreover, as press forming progresses in the width direction,
Since the unpress-formed portion of the plate material is not restrained by the press part, the widthwise extension of the pressed portion is not hindered, and as a result, a profiled material without buckling is manufactured.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

1 to 7 (A) to (E) are examples of the present invention, and as an example, similar to FIGS. 11 to 13, there is a recessed portion extending in the longitudinal direction 3 at the center of the width direction 1 on one side. 4 and has flat portions 5 extending in the longitudinal direction 3 on both sides of the recessed portion 4 in the width direction 1.

A plate-shaped mounting member l5 extending in the width direction l and the longitudinal direction 3 is provided.

The mounting member l5 is provided with a press part for press-forming the recess 4 of the irregularly shaped material 6, which has an outer shape that expands to both sides in the width direction 1 of the plate material 2 as it goes in the feed direction 16 (the downstream side of the longitudinal direction 3) of the plate material 2. l7 and a press part l8 for press-molding the flat part 5 of the profiled material 6 are integrally provided in a protruding manner.

The press part 17 for press-forming the four parts 4 of the deformed material 6 with a large amount of wall thickness reduction includes a gently expanding section ■9 that gradually expands in the width direction l on the upstream side of the feed direction l6 of the plate material 2; It has an elongated convex shape with a parallel section 20 that approaches a state substantially parallel to the feeding direction l6 on the downstream side of l9.

Further, press parts l8 for press-forming the flat part 5 of the profiled material 6 with a small reduction in wall thickness are provided on both sides of the parallel section 20 of the press part l7, and have a width on the upstream side of the feeding direction 16. The width direction 1 of the plate material 2 has a rapid expansion section 21 that rapidly expands in the direction l, and a parallel section 22 that approaches a state substantially parallel to the feed direction l6 on the downstream side of the rapid expansion section 21.
The shape should be long and flat.

Further, the gently expanding section 19 and the parallel section 20 of the press part 17 for press forming the recess 4 of the profile 6 are formed into a cylindrical convex part 23 with a curvature corresponding to the recess 4 of the profile 6, In addition, a rapidly expanding section 2l and a parallel section 22 of a press part l8 for press-forming the flat part 5 of the profiled material 6 are formed on a flat surface 24 corresponding to the flat part 5 of the profiled material 6.

In addition, if necessary, the press section 17. 18, the slow expansion section l9 and the rapid expansion section 21 may be tapered in the thickness direction, or may be rounded 25.

Press mold 26 having press parts 17 and 18 configured as described above
and a press die 27 having a flat press surface are set on the upper and lower die stands 29 and 30 of the continuous press device 28.

As shown in FIG. 5, the continuous press device 28 includes a housing 31 through which the plate material 2 passes, and is provided so as to be rotatably driven at the upper and lower portions of the housing 3l and at the upstream portion in the feeding direction l6. Eccentric wheels 32.33 are connected via rods 34.35 to the respective eccentric parts of the eccentric wheels 32.33 so that they can approach and leave each other in the vertical direction, and can reciprocate between upstream and downstream in the feeding direction l6. It consists of a pair of upper and lower mold stands 29.30, and each eccentric wheel 32.3
3, the mold base 29.30 on which the press mold 26.27 is attached moves in a circular manner.
The plate material 2 is press-formed between press molds 26 and 27 while being continuously fed.

In addition, 37 is a feed roll, and 38 is a width direction positioning roll.

Next, the operation will be explained.

The continuous press device 28 is driven to press the plate material 2 while continuously feeding it between a press die 26 having press sections 17 and 18 and a press die 27 having a flat press surface.

Then, an arbitrary part of the plate material 2 is fed little by little in the feeding direction l6, for example, into the press die 26 in FIG.
As shown in FIG. 7 (A) to (E), the parts (A) to (E) of the press part 17. go.

By doing so, the extension of the plate material 2 in the width direction 1 per press is suppressed to a small extent.

Moreover, when the press forming gradually progresses in the width direction l, the part that has not been press formed becomes the press mold 26.2.
7, the press-formed portion is not restricted from extending in the width direction l, and therefore the plate material 2 extends in the feeding direction l6, and buckling occurs in the press-formed profiled material 6. occurrence is prevented.

In addition, in the press part l7 for press-forming the four parts 4 of the profiled material 6, since the slowly expanding section l9 is formed, the concave part 4 where the amount of wall thickness decreases is large can be formed little by little with high precision by repeating the number of presses. I can go.

In addition, in the press part 18 for press-forming the flat part 5 of the profiled material 6, the rapid expansion section 2l is formed, so that the flat part 5 with a small amount of wall thickness reduction can be quickly formed at once with a small number of presses.

Therefore, by combining the slow expansion section 19 and the rapid expansion section 21, a high quality profiled material 6 can be manufactured efficiently.

For convenience of explanation, the press die 27 having a flat press surface on one side of the upper and lower sides is used, but the same effect can be obtained even if the press die 26 with press parts 17 and 18 is used on both the upper and lower sides. The same applies to examples).

In addition, in FIG. 5, it has been explained that the sheet material 2 is fed by the drive device 33.
8 may feed the plate material 2 by a fixed amount, and the continuous press device 28 may only perform vertical pressing.

Figures 8 to 10 show other embodiments of the present invention, in which the thickness reduction amount is In order to press-form the convex part 39 in the widthwise direction of the deformed material 40, the press part 43 has a rapidly expanding section 41 and a parallel section 42 forming a cylindrical or conical concave surface 48, and In order to press-form the flat portions 5 on both sides of the multi-shaped material 40, a press die 4 is provided with a press portion 46 having a gently expanding section 44 forming a flat surface 49 and a parallel section 45.
7 is used.

Even in this case, the same effects as in the embodiment described above can be obtained.

It should be noted that the press mold for a profiled material according to the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] As explained above, according to the press mold for a profiled material of the present invention, various excellent effects as described below can be achieved.

Since the presses B and P have an external shape that expands to both sides in the width direction of the plate material as it goes downstream in the feeding direction of the plate material, the plate material is gradually press-formed from the center in the width direction toward both sides, and As a result, it is possible to produce a high-quality profiled material without buckling.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a side view of FIG. 1, FIG. 4 is a perspective view of FIG. 1, and FIG. 1 is a side view of a continuous press device using the press die shown in FIG. 1, FIG. 6 is a plan view showing the press state of a plate material by the press die shown in FIG. 1, and FIGS. 7 (A) to (E).
1 is a diagram showing the state of the press in parts (A) to (E) of the press die in FIG. 1, FIG. 8 is a plan view of another embodiment of the present invention, and FIG. 9 is a perspective view of FIG. 8. , FIG. 10 is a diagram showing the state of pressing a plate material using the press die shown in FIG. 8, FIG. 11 is a perspective view of a conventional press die, and FIG. FIG. 13 is a perspective view showing the deformed material obtained in FIG. 12. In the figure, 1 is the width direction, 2 is the plate material, 6.40 is the profiled material, 15 is the mounting member, 16 is the feed direction, 17.18, 43.46 are the press parts, 23 is the convex surface, 24.49 is the flat surface, 48 indicates a concave surface.

Claims (1)

[Claims] 1) The mounting member is provided with a press part having an external shape that expands to both sides in the width direction of the plate material as it goes downstream in the feeding direction of the plate material, and the press part has a concave surface or a shape corresponding to the shape of the irregularly shaped material to be obtained by pressing. A press mold for irregularly shaped materials characterized by a convex surface.