JPH04344820A - Manufacture of wide width member by extrusion molding method and wide width member - Google Patents

Abstract

PURPOSE:To easily manufacture a wide width member by an extrusion molding method in which the number of members is small by stretching the member subjected to extrusion molding in a state that its width direction is bent in the width direction. CONSTITUTION:For instance, by using a forming die with an extrusion forming aluminum alloy, a spiral extrusion section 3 is subjected to the extrusion molding. Subsequently, the extrusion member 3 formed in its spirally bent shape is subjected to roll forming, etc., by using many rolls before age hardening. A wide side member obtained in such a manner is wider in the width than a section obtained by a regular extrusion forming method, therefore, at the time of forming a machine body, etc., of a vehicle, etc., by joining the member to a columnar member, they can be formed by the smaller number of members than conventional, and a welding part is reduced and strength is improved.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a method for producing a wide profile and a wide profile by an extrusion method, and more specifically, a method for producing a profile wider than the width of a mold in an extrusion method, and a wide profile. In particular, the present invention relates to a wide profile material suitable for use in railway vehicle structures and the like.

0002

[Prior Art and Problems to be Solved by the Invention] Conventional light alloy extruded shapes are extruded into the size range of a mold (die) with an outer diameter that corresponds to the capacity of an extruder, and then used as is for vehicles such as vehicles. It was used as a material for constructing the structure of. Therefore, when manufacturing wide parts or products such as vehicle side structures, a large number of sections A are arranged in parallel and joined to column members B, etc., as shown in Fig. 5. It was necessary to join each section A by welding or the like.

[0003] Furthermore, when extruded shapes are not used, it is necessary to attach another member to a flat plate of a predetermined width by welding or the like, which requires a great deal of effort in either case. Furthermore, there was a problem in that welding distortion occurred in the welded portion, requiring finishing work.

[0004] On the other hand, when trying to obtain wide shapes by extrusion molding, an extremely large extruder is required;
It is also technically difficult, and with normal extrusion molding methods,
It is believed that there is a limit to the width of extruded sections that can be formed.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for easily producing a wide profile by extrusion molding.

[0006]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the method of manufacturing a wide profile material by the extrusion method of the present invention is to produce a wide profile material by extrusion molding with the width direction bent. The wide shape material of the present invention is characterized by being stretched, and the wide shape material of the present invention is made by extruding a shape material bent in the width direction.
It is characterized by being stretched in the width direction.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in more detail below based on an embodiment shown in the drawings.

FIG. 1 is an end view of a section extruded using the mold shown in FIG. 2, and FIG. 3 is an end view of a wide section formed into a desired shape by stretching the section in the width direction. FIG.

That is, in manufacturing the wide profile 1 shown in FIG. 3, first, the spiral extruded profile 3 shown in FIG. 1 is extruded using the mold 2 shown in FIG.

[0010] The above extrusion molding can be carried out by a normal extrusion method using an extruder. For example, an aluminum alloy for extrusion molding may be extruded by a well-known method, and the mold 2 can also be manufactured by a usual method. It can be done in a way.

The extruded section 3 formed into a spirally bent shape as described above is partially or entirely stretched in the width direction to form a wide section 1 having the shape shown in FIG. This stretching treatment can be performed, for example, by roll forming using a large number of rolls, and in the case of aluminum alloys, the stretching treatment can be easily performed by performing the stretching treatment before age hardening.

[0012] In manufacturing the wide profile 1, it is necessary to set the dimensions and bending state of each part of the extruded profile 3 in consideration of the shape and dimensional accuracy after stretching. In addition to the spiral shape described above, the shape can be appropriately set to a simple L-shape, U-shape, etc. depending on the width after stretching, the capacity of the extruder, etc.

The wide profile 1 thus obtained is wider than the profile obtained by the usual extrusion method, so the profile 1 is joined to the column member B as shown in FIG. When forming the body structure of a vehicle, etc., it is possible to use fewer sections than before, reducing the number of welding points and improving strength, saving labor in the body structure manufacturing process and improving product accuracy. , the quality of joints can be improved, and the appearance of the product can be improved. Furthermore, it is possible to form the plate with a thickness that meets the required strength, and the shape and spacing of the bone parts connected to the column member can also be set arbitrarily.

[0014] The present invention can be used not only for vehicle structures but also in various fields, and the material is not limited to metal but can also be applied to synthetic resin. ,

[
0015

Effects of the Invention As explained above, according to the method of manufacturing a wide profile material by the extrusion molding method of the present invention, it is possible to obtain an unprecedentedly wide profile material by the extrusion molding method. The wide extruded sections thus produced can be used to form wide sections such as the side structures of vehicles using fewer sections than conventional ones, reducing manufacturing costs and improving strength.

[Brief explanation of the drawing]

FIG. 1 is an end view of an extruded section showing one embodiment of the present invention.

FIG. 2 is a front view of the mold.

FIG. 3 is an end view of a wide profile.

FIG. 4 is an explanatory diagram showing an example of manufacturing a structure using wide profile members.

FIG. 5 is an explanatory diagram showing an example of manufacturing a structure using conventional shapes.

[Explanation of symbols]

Claims (2)

[Claims] 1. A method for producing a wide shape material by an extrusion molding method, which comprises stretching the shape material extruded in a bent state in the width direction in the width direction. 2. A wide profile material, characterized in that the profile material is extruded while being bent in the width direction and then stretched in the width direction.