JPH04157033A - Manufacture of metallic annular disk products of clutch disk core plate, etc. - Google Patents

Abstract

PURPOSE:To largely improve the manufacturing yield by bending a metallic belt-like material of the prescribed section in its width direction, cutting by a round unit of turning, manufacturing an annular bent formings of end parts being butted and then jointing the end parts of the formings mutually. CONSTITUTION:A spiral like bent formings S of the prescribed radius of curvature is subjected to bending by using the belt-like material, at first, making the thick wall part 4a side for ear to the outer circumferential side. Next, this bent formings S is cut by a round unit of turning, an annular bent formings 9 with end parts butted is produced. Succeedingly, the end parts 9a, 9b of this bent formings 9 are jointed mutually, and the end parts jointed products 10 is manufactured. Then, the thick wall part for ear 4a of the circumferential edge of the end parts jointed formings 10 is worked with chamfering, the circumferential end ear part 2a is formed. Through the above processes, the clutch disk core plate is manufactured. Further, by firmly fixing the friction material 3 with large coefficient of friction on both surfaces of this core plate 2, the clutch disk is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention is applicable to various annular disk products made of metal, such as
The present invention relates to a method of manufacturing a metal annular disk product used for a torque transmission member such as a clutch disk of a multi-disc clutch.

Conventional Technologies and Problems For example, as shown in Fig. 7, a clutch disc (1) has a thin annular metal core plate (2) and a friction material (3) with a large friction coefficient fixed to both sides thereof. is used. The core plate (2) is manufactured so as to integrally have a plurality of thickened tabs (2a) on its periphery.

Conventionally, annular disk products such as the clutch disk core plate (2) have been manufactured by a press working method or a die casting method.

However, in the case of the pressing method, an annular plate is punched out from a rectangular or continuous plate-shaped material, which has the disadvantage that a large amount of material is wasted and the manufacturing yield is low.

In addition, when using the die-casting method, the thin wall thickness of the product tends to result in poor hot water distribution of the molding material, so in order to improve this, spaces that are unrelated to the product shape, such as pools of hot water, are filled with metal. It is necessary to set a large amount in the mold, and therefore, a large amount of unnecessary parts are removed from the product after casting, and this method also has the disadvantage of causing a large amount of wasted material and poor manufacturing yield.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a metal annular disk product such as a clutch disk core plate, which eliminates the above-mentioned conventional drawbacks and can significantly improve manufacturing yield.

Means for Solving the Problems In order to achieve the above object, the present invention bends a metal strip-shaped material with a predetermined cross section in its width direction and cuts it into circumferential units to produce an annular bent product with butted ends. The gist of this invention is a method for manufacturing a metal annular disk product such as a clutch disk core plate, which is characterized by joining the ends of the molded product after manufacturing.

EXAMPLE An example in which the method of the present invention is applied to the manufacture of a core plate (2) which is a component of a latch disk (1) as shown in FIG. 7 will be described below.

It goes without saying that the method of the present invention can be widely applied to manufacturing various annular disc products in addition to the clutch disc core plate (2).

As shown in FIG. 1, the material (4) used for manufacturing the core plate (2) is a strip-shaped AΩ alloy extruded material having a summer thick portion (4a) on the negative side edge.

Using this strip material (4), it is first bent into a spirally bent product (8) with a predetermined radius of curvature, with the summer thick part (4a) side facing the outer periphery, as shown in FIG. Bending process.

This bending process is preferably performed by so-called compression bending. In order to perform this compression bending, a three-dimensional bending machine called a multi-bender is used in this embodiment.

This bending machine generally has the following features as shown in FIG.
A fixed mold (5) having a conduction hole (5a) along the outer circumferential shape of the workpiece, and a fixed mold (5) disposed in front of the fixed mold (5), which also has a workpiece conduction hole (6a) and extending in three-dimensional direction. a movable gyro mold (6) supported so as to be turnable and displaceable;
It is based on a work feeder (7) using a drive roller device etc. arranged at the rear position of the fixed mold (5), and the feeder (7) connects both molds with the through hole (5a) (
The workpiece is subjected to compression bending through the cooperation between the conduction of the workpiece to 8a) and the operation of the movable gyro mold (6).

That is, the above-mentioned strip material (4) is conductively transferred to the through holes (5a) (6a) of both the molds (5) and (6) by the feeder (7) using this bending machine. By holding the movable gyro die (6) at a predetermined displacement and turning position, the product is bent into a spirally bent product (8) as shown in FIG.

Next, this helical bent product (8) is cut into circumferential parts, thereby producing an annular bent product (9) with abutted ends as shown in FIG. 4.

Subsequently, the end portion (9a) of this annular bent molded product (9)
(9a) are joined together as shown by the reference numeral (10a) in FIG. 5 to produce an end-joined product (10). This joining may be performed by various joining methods such as upset butt welding, mechanical caulking, and pressure welding.

Thereafter, the thick summer portion (4a) at the periphery of the end-jointed product (10) is notched to form a peripheral edge portion (2a) as shown in FIG.

Through the above steps, the clutch disc core plate (2) is manufactured. The clutch disc (1) shown in FIG. 7 can be obtained by fixing a friction material (3) having a large friction coefficient to both sides of the core plate (2).

In addition, the notch processing of the summer thick-walled part (4a) is performed using a strip-like material (4
), spiral bent product (8) or annular bent product (
9) may be performed.

In addition, in the method of the above embodiment, the strip material (4) is processed into a spirally bent product (8), and this is cut into circular units to produce an annular bent product (9). However, the annular bent product (9) may be manufactured by cutting the strip material (4) every time it is bent.

Effects of the Invention As described above, the method of the present invention involves bending a metal strip-shaped material with a predetermined cross section in its width direction and cutting it into circumferential units to produce an annular bent product with butted ends. Since the ends of the molded product are then joined together, metal annular disk products such as clutch disk core plates can be manufactured with good yield. Also, since it does not depend on casting,
It contributes to improving the working environment of factories, and also saves overall production energy, making it possible to reduce product costs. Another advantage is that it is easy to change raw materials and it is easy to automate the process.

[Brief explanation of the drawing]

1 to 7 show an embodiment of the method of the present invention, in which FIG. 1 is a perspective view of a long material, FIG. 2 is a perspective view of a processing machine used for bending the long material, Fig. 3 is a perspective view of a helical molded product, Fig. 4 is a perspective view of an annular cut product, Fig. 5 is a perspective view of an end joint product, Fig. 6 is a perspective view of a clutch disc core plate, and Fig. 7 is a perspective view of a clutch disc. (1)...Clutch disc, (2)...Clutch disc core plate, (4)...Metal band plate-like elongated material, (
9)...Annular bending molded product, (10)...End contact patent applicant Honda Motor Co., Ltd. F.C.C. Co., Ltd.

Claims (1)

[Claims] A process of bending a metal strip-shaped material with a predetermined cross section in its width direction, cutting it into circumferential units to produce an annular bent product with the ends butted together, and then joining the ends of the molded product. A method for manufacturing a metal annular disc product such as a clutch disc core plate, characterized by: