JPH0425313A - Method for separating outer periphery of thin wall thickness ring - Google Patents

Abstract

PURPOSE:To improve productivity by fixing a jig to a table of a universal press and serrating the outer periphery of a thin wall thickness ring-like workpiece with a forming pot type broach mounted on a head of the press. CONSTITUTION:In serrating a thin wall thickness ring-like workpiece 4, the axis of a head 2 of a universal press is aligned with the axis of a jig 3 to fix the jig 3 to a table 1. Next, a shaft head 3a of the jig 3 is fitted in a shaft hole 4a of the workpiece 4. The press is operated to vertically reciprocate the head 2 and serrate the outer periphery of the workpiece 4 in one process.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for forming serrations on the outer periphery of a thin ring-shaped workpiece using a general-purpose press.

[Prior art and problems to be solved by the invention] Conventionally, methods for performing serrations on the outer periphery of a thin ring-shaped member include a rolling method using a roll forging machine, and a cutting method using a gear cutting machine such as a hobbing machine. There are processing methods, etc.

However, in the rolling method using the roll forging machine, precise serration processing is not possible due to plastic working, and the high rolling pressure causes deformation of thin ring-shaped workpieces. For this reason, an extra post-process is required in which the workpiece is initially formed into a thick-walled ring shape, the workpiece is subjected to serration processing, and then the inner diameter is machined to be finished into a thin-walled ring shape, which increases the number of processing steps.

Furthermore, the cutting method using a gear cutter allows for precise serration processing, but since the gear cutter is a high-grade precision machine, there are problems such as a large amount of machine depreciation costs that are included in the processing cost.

The present invention has been made in view of the above-mentioned conventional problems, and has an object to solve the problems. The purpose is to provide a serration processing method.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention fits the shaft hole of a thin ring 6-shaped workpiece into the shaft head of a two-step shaft-shaped jig having the same diameter as the shaft hole, and Jig 1 is fixed to the table of a general-purpose press and serrations are performed on the outer periphery of a thin ring 6-shaped workpiece using a general bot-type broach attached to the head of the press.

[For production]

The method for processing the outer periphery of a thin-walled ring with serrations according to the present invention uses a general-purpose press and a shaft-type bot-type broach for the serration processing, so the machine depreciation cost included in the processing cost is low, and the processing time is short. This will improve productivity.

In addition, since the thin ring-shaped workpiece is fixed to the press table by fitting its shaft hole into the shaft head of a stepped jig with an accompanying shaft head, there is no deformation during processing and centering is easy. It is.

〔Example〕

The present invention will be described in detail below based on an illustrated embodiment.

In the figure, 1 is the table of a general-purpose press, 2 is the head of the same press, 3 is a jig fixed to the table 1 of the press,
4 is a thin ring-shaped workpiece attached to jig 3, 5
is a pot-shaped broach attached to the head 2 of the press.

The jig 3 is a stepped shaft type having a shaft head 3a having the same diameter as the shaft hole 4a of the thin ring-shaped workpiece 4. It is fitted and attached to the head 3a.

The total pot type broach 5 is a cylindrical broach tool case 5a in which a plurality of ring-shaped broach tools 5b, each having an inner cutter for cutting the outer circumferential serrations, are stacked and accommodated. The inner diameter of the broach tool is gradually reduced in minute dimensions from the lower stage to the upper stage, and the inner diameter of the cutting edge of the uppermost broach tool is made equal to the groove diameter of the serrations to be cut into the thin ring-shaped workpiece 4.

To perform serration processing on a thin-walled ring-shaped workpiece 4, the jig 3 is fixed to the table 1 by aligning the axis of the head 2 of the general-purpose press with the axis of the jig 3, and the thin-walled ring-shaped workpiece 4 is serrated on the shaft head 3a of the jig 3. The shaft hole 4a of the ring-shaped workpiece 4 is fitted. Then, by operating the press and reciprocating the head 2 up and down, serrations are formed on the outer periphery of the thin ring-shaped workpiece 4 in one step.

〔Effect of the invention〕

As explained above, the present invention uses a general-purpose press and a total pot type broach for serration processing of a thin-walled ring-shaped workpiece, so the machine depreciation cost included in the processing cost is low, and the processing is done in one step. It takes less time and improves productivity.

In addition, since the thin-walled ring-shaped workpiece is fixed to the press table with a stepped jig whose shaft hole has a shaft head of the same diameter,
This has extremely practical effects such as no deformation during processing and easy centering.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view of a main part during serration processing, and FIG. 2 is a sectional view taken along the line A--A in FIG. 1. 1...Table, 2...Head, 3...Jig, 3
a... Shaft head, 4... Thin ring-shaped workpiece, 4a.
...Shaft hole, 5...General rules bot type brooch, 5a...
Brooch tool case, 5b...brooch tool.

Claims (1)

[Claims] The shaft hole of the thin ring-shaped workpiece is fitted into the shaft head of a stepped shaft-shaped jig having the same diameter as the shaft hole, and the jig is fixed to the table of a general-purpose press. A method for processing outer periphery of a thin-walled ring with serrations, characterized by performing serration processing on the outer periphery of a thin-walled ring-shaped workpiece using a full-length pot-shaped broach attached to a head.