JPS59107784A - Production of brake disc - Google Patents

Abstract

PURPOSE:To produce a titled product by rotating an assembly consisting of a disc plate and pad sliding contact rings on both side faces thereof, irradiating laser light from both side faces thereto while moving optical waveguides in a vertical direction and welding the assembly spirally or like multiple circles. CONSTITUTION:Laser light is irradiated from a light source 10, via a pair of righ and left optical waveguides 9, 9 on both outsides of an assembly 3 consisting of a disc plate 1 and pad sliding contact rings 2, 2 on both side faces thereof, to said assembly. The respective inside superposed surfaces 3a, 3a are welded 11 by the laser light and the respective welds 11 have the circular orbits along the rotating direction with the rotation of the assembly 3. The assembly 3 and the waveguides 9, 9 are relatively moved along the radial direction of the assembly 3 in this stage. The welds 11 which are spiral over the entire part are obtd. if, for example, the waveguides 9, 9 sides are made freely movable as a whole in the vertical direction.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a brake disc mainly applied to two-wheeled motor vehicles.

Conventionally, as a manufacturing method of this type of brake disc, a method is known in which a pair of pad sliding rings that cooperate with the brake disc are superimposed on both sides of a disc plate and bonded by brazing or other means. In this case, it is preferable that the bond be simple and strong.

The object of the present invention is to obtain a method that meets these requirements, and includes an assembly consisting of a disc plate and a pair of left and right pad sliding rings superimposed on both sides of the disc plate. While rotating it, a laser beam is irradiated to it through a pair of left and right light guide paths on both outer sides, so that each weld on a circular trajectory along the rotation direction is generated on each overlapping surface inside it. and further move the assembly and the light guide relatively in the radial direction of the assembly, so that the welding on the circular trajectory is performed in a spiral or other multiple circular shape extending from the inner periphery to the outer periphery of the disk. It is formed by forming.

An example of implementing the present invention will be explained with reference to the attached drawings.

In the drawings (11 is a disk-shaped disc play), (2) (2
) indicates a pair of left and right pad sliding rings superimposed on both sides of the plate (1) and the disk (2) (2).
An assembly consisting of +31 U is rotatably prepared by being sandwiched between a pair of left and right clamp members that can be opened and closed mutually on a base (4), and is connected to a motor or other drive source (6). Added the ability to give rotation. To explain further, one example of the device is as shown in the third figure, in which the pair of clamp members (51(5) are opened and closed mutually by a cooperating cylinder (7) on the rear surface of one of the clamp members (51(5)). Further, each of the mutually opposing front surfaces of the members (5) (5) has a ball (5).
The assembly (3) is removably fitted into the shaft hole (5b) at the center thereof, and is detachable using the clamp claw (8a) on the front surface of the assembly (3). tied together,
The assembly +31 is thus provided with a rotational drive.

Further, according to the present invention, the assembly (3) is connected to the laser light source Q via a pair of left and right light guide paths (9) on both outer sides thereof.
Each laser beam from O1 is applied, and each welding surface (3a) (3a) therein is given each welding αυ, the details of which can be seen, for example, in the passage shown in Figure 3. That is, the light guide path (91 (9) is connected to each transparent window (5c) (5c) formed in advance in the pair of clamp members (5) (5) on both sides of the assembly (3). It is assumed that the light source α0) extends through the inside and is provided as a single light source common to these. Thus, according to the rotation of said assembly (3):
Each weld (111) on each overlapping surface (3a) is obtained in a circular trajectory along the direction of rotation.

Further, according to the present invention, during such operation, the assembly (3
) and the light guide path (9) +91 relative to the assembly (3).
), and in the illustrated example, the +91 side of the light guide path (9) can be moved as a whole in the vertical direction in the drawing. In this way, the weld aυ on the circular locus described above is obtained in a spiral shape as a whole, as clearly shown in FIG. 2, for example. In this case, it is also possible to perform the vertical movement intermittently to obtain multiple circles. Furthermore, it is also possible to appropriately intermittent the irradiation of the laser beam to obtain a shape in which the welding αυ line is intermittent.
) It is advantageous to use a type in which it is pre-divided into a plurality of pieces, in order to eliminate welding in the ends of each piece.

The thus obtained product (3) is then subjected to a grinding process on each surface to remove the weld marks on each surface caused by the above-mentioned welding αυ.

In this way, according to the present invention, the disc plate and the pad sliding rings on both sides of the disc plate are welded using laser light guided from both outside sides of the disc plate, which simplifies the work. It is obtained in a spiral or other multi-circular shape on the polymerization surface, and has the effect of improving its binding.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of one example of the method of the present invention, FIG. 2 is a front diagram of one example of the product, and FIG. 6 is a partially cutaway front view of one example of the device.

Claims (1)

[Claims] The assembly consisting of a disk plate and a pair of left and right sliding contact rings superimposed on both sides of the disk plate is rotated, and a laser beam is applied to it through a pair of left and right light guide paths on both outside sides of the disk plate. is irradiated to cause each overlapping surface therein to produce each weld on a circular trajectory along the direction of rotation, and further relative to the assembly and the light guide in the radial direction of the assembly. A method for manufacturing a brake disc, comprising moving the weld on the circular trajectory to form a spiral or other multiple circular shape extending from the inner circumference to the outer circumference of the disk.