JPH04127924A - Method for roll forming - Google Patents

Abstract

PURPOSE:To prevent the generation of burr at the time of cutting to the prescribed dimension by setting a cut chamfer at the hoop material on the preceding process of roll forming. CONSTITUTION:When the prescribed length of the work is pulled out from the hoop material 1 of the roll forming mill 3, the chamfered part 6 is worked with the chamfering machine 2, the work is advanced with the roll of the roll forming mill 3, plastic working is executed and the products 5 is obtained. The products 5 is moved to the cutting machine 4, the cutting machine 4 operates at the chamfering position 6 and the products 5 connected with the chamfer part 6 is separated. Therefore, the burr generated at both ends of the products subjected to plastic working can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a manufacturing method suitable for preventing the occurrence of curling during cutting into predetermined dimensions in roll forming.

[Conventional technology]

Conventional roll forming involves continuously supplying hoop material, plastically working it into a product shape using rolls, and then cutting it to the required length with a saw blade.

[Problem to be solved by the invention]

The above-mentioned conventional technology does not take into consideration the generation of burrs when cutting to the required length with a saw blade after roll forming, and there is a problem in that it takes a lot of time to remove the burrs after cutting. .

An object of the present invention is to prevent the generation of burrs during cutting after roll forming, and to eliminate deburring operations and noise during deburring.

[Means to solve the problem]

In order to achieve the above object, a notch is provided at a predetermined length position in a flat plate state in the pre-roll forming process of the hoop material, and in the post-roll forming process of the hoop material having the notch, It is cut at a position with a notch.

[Effect]

When the workpiece is drawn from the hoop material by a predetermined length, the notch processing is performed using a mold using a press machine, etc. in a flat state, so there is no problem with the notch part of the workpiece, and the workpiece is is supplied to the roll forming device in that state. The workpiece is formed into a certain product shape by the rolls as it moves forward, and the product is connected at the part that remains after notching. The part that remains after this notch process becomes a flat plate or a simple shape close to a flat plate, and because the cutting process is performed using a mold using a press machine, etc., there is no problem of curvature and the product is cut and separated. can do. This prevents burrs from forming on both end faces of the roll-formed product. Furthermore, even if a slight burr is generated during notch processing, the burr will be reliably crushed and eliminated by the pressure applied during subsequent roll forming.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. FIG. 1 shows the entire roll forming device, in which a workpiece pulled out of a hoop material 1 passes through a notch processing machine 2, is supplied to a roll forming device 3, where it is plastically worked into a product shape, and is then processed by a cutting machine 4. Separate the connected products 5. When the workpiece is pulled out from the hoop material 1 by a predetermined length dimension, the notch processing machine 2 operates, and cuts the notch part 6 shown in FIG. The remaining parts of the rolls 6 are moved forward by a roll with a drive device of the roll forming device 3, and are plastically worked into a certain product shape. A cross-sectional view with the notch 6 at this time is shown in FIG. The product 5 that is not left after processing the notch 6 is moved from the roll forming device 3 to the cutting machine 4, and the cutting machine 4 operates at the position of the notch 6 and is connected at the notch 6. The above operations are performed continuously. FIG. 4 and FIG. 5 show a shape diagram of another notch 7 in this embodiment, and a sectional view after roll forming at that time.

In this embodiment, since the attachment hole 8 of the product 5 is machined at the same time as the notch 6 by the notch processing machine 2, the attachment hole 8 is used as a positioning hole for separating the product 5 by the cutting machine 4. This enables highly accurate product separation.

〔Effect of the invention〕

According to the present invention, it is possible to prevent the occurrence of burrs on both ends of a product that is plastically worked by roll forming, so it is possible to eliminate the burring work, and furthermore, it is possible to eliminate the noise generated during the burring work. can.

[Brief explanation of drawings]

FIG. 1 is a side view of the entire roll forming apparatus according to an embodiment of the present invention, FIGS. 2 and 4 are plan views of a notch, and FIGS. 3 and 5 are FIG. 2, respectively. A sectional view taken along the line ■-■ after roll forming in FIG. 4. It is a sectional view taken along the line V-V. 1... Hoop material, 2... Notch processing machine, 3...
Roll forming device, 4... Cutting machine, 5... Product, 6° 7... Notch, 8... Mounting hole.

Claims (1)

[Claims] 1. A roll forming method in which a hoop material is continuously supplied and plastically worked into a product shape, characterized in that a notch is provided at a predetermined length of the hoop material in a pre-step of the roll forming. Roll forming method.