JPS58110780A - Production of door sash for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a door sash for a vehicle that has a generally U-shaped side view.

Conventionally, this type of door sash has been manufactured by applying sash material to the outside portion 1. as shown in Fig. 1a. Inner part 2. Glass receiving groove 3 Sea urchin strip holding fM54 After bending part of the upper into a side arch shape as shown in Figure 1C, each joint end is cut diagonally at a predetermined bending angle θ (:) and then butted against each other. ,Fludge butt, TEG, MIG, arc, etc. to weld and fix (manufactured by:

However, according to this manufacturing process, the upper part a.

Since the side parts are bent to their final shape and then welded, the cross-sectional shape of each part deforms as it bends in the axial direction, making it difficult to align the butt edges cut diagonally. Welding defects are likely to occur where the butt is not accurate (2); are forced to make corrections.

In order to eliminate such drawbacks, the present invention provides step C of the manufacturing process.
The object of the present invention is to provide a method for manufacturing a door sack for a vehicle with two modifications.

That is, in the door sash manufacturing method according to the present invention,
Predetermined cross-sectional shape C: At least the upper side of the bent sash material is welded and joined to the side side while keeping it straight. C2 is used to ensure reliable welding (two times).

Hereinafter, this will be explained based on the second and third embodiments shown in the figures.

In the illustrated embodiment 4, the upper part a and the side part 2 are welded and joined together so that the side part 4 has a substantially rectangular shape. The cross-sectional shape is as shown in Figure C (2 pieces of 9 sash material are bent and cut into 9 parts, and the sash material for the side panels is as shown in Figure 1 (2 fronts can be bent into an arc shape and placed). On the other hand, at least the upper 1l11 is left with a predetermined cross-sectional shape (-) in the straight shape of the formed sash material. Cut more diagonally, butt each other, and then weld and fix.

Flash butt, TEG, MIG, and arc welding methods can be used for welding, among which TEG,
The MIG welding method is suitable.1 After these welds, the upper side a remains at least straight as shown in the second figure, and the side surface has a shape exactly like a gold box. On the upper side a, it is bent and formed so that the side surface has an appropriate shape such as a substantially arcuate shape. As shown in the third figure, a receiver with a curved surface according to the desired bending shape on the inside of the upper side and the side side is supported from the inside of the second side by a mold (not shown). This can be done by applying pressing force with the pressing die W1. In the pressing die W+, the pressing force is applied while the receiver slides along the axis (=) on the upper side from the center outside of the bending radius of the die. If there is a side @bl2, the press mold W3 that slides in synchronization with the press mold Wi (just hold it from the second position, and then bend the side @b4b with the press mold W2 so that the side surface of the side @b4b has a circular arc shape). can do.

In this way, if at least the upper side a is made straight and each end is joined, the bending process of the upper [a (accompanied by the cross-sectional shape C; deformation does not occur, so the side side Each joint edge can be matched accurately.Miroku, upper side a,
After joining each end of the side panel, the side surface shape such as an arched shape such as the upper side a is bent: The side that needs to be formed is bent, so the processed side is bent into the desired shape (= can be retained.

Although the above-mentioned embodiment is explained based on the front side door sash which has a substantially U-shaped shape, it also applies to the back side door sash 1 which forms a shadow. be able to.

Furthermore, the welding surface can be polished to a beautiful smooth surface by grinding it with a grinder or the like.

As described above, according to the method of manufacturing a door sash according to the present invention (2), it is possible to join each end of the upper side and the side side (2) without causing the joint failure due to the failure of welding and bending of each frame part. Shape (because two-parallel attachment does not occur,
This enables accurate joining and shape retention.

[Brief explanation of drawings]

FIGS. 1B, b, and c are explanatory views showing the conventional door sash manufacturing process, and FIGS. 2 and 3 are explanatory views showing the door sash manufacturing process according to the present invention. a Part of the near brim, b: Side part, %+, W2: Push type.

Claims (2)

[Claims] (1) Predetermined cross-sectional shape C: Using the molded sash material, from the upper part and the side part to the Confucian surface,
In order to form a vehicle door sash having a U-shape or the like, an appropriate shape such as a side arch shape at least along the axial direction C: A part of the upper side that needs to be bent is made straight as is from the above sash material. C2 is held, and each joint end is cut and formed diagonally at a step θ angle of a predetermined bending angle θ.
A method for producing a door sash for a wheel, characterized in that the parts are butted and welded together, and then a portion of the straight upper part is curved into a desired shape. (2) The above-mentioned side surface bending is such that the support corresponding to the desired bending shape is pressed into contact with the mold ζ2 by a pressing die that presses and slides a part of the upper part from the outside of the center of the bending radius. A method for manufacturing a wheel door sash according to item 1.