CN103612069A

CN103612069A - Method for manufacturing hollow shaft of isolator

Info

Publication number: CN103612069A
Application number: CN201310506130.8A
Authority: CN
Inventors: 陈力; 胡立峰; 陈耀君
Original assignee: LISHUI XINYI STARTER DRIVER Co Ltd
Current assignee: LISHUI XINYI STARTER DRIVER Co Ltd
Priority date: 2013-10-24
Filing date: 2013-10-24
Publication date: 2014-03-05

Abstract

The invention discloses a method for manufacturing a hollow shaft of an isolator for an automobile starter. The method includes the process of extrusion forming of a blank through a press cold mold. The method is characterized in that a casing pipe is used as the blank, and pipe drawing, rolling and pipe expanding processes are adopted in the machining process of the casing pipe. By the adoption of the technical scheme, the casing pipe is used as the blank, the machining process of the hollow shaft is simplified through the pipe drawing, stretching and other technological processes, the hollow shaft has the advantages of being high in work efficiency, quick in forming, and low in production cost, and therefore production benefits of production enterprises can be greatly increased.

Description

The preparation method of the hollow shaft of isolator

Technical field

The present invention relates to the manufacture method of the hollow shaft of the isolator on a kind of automobile starter.

Background technology

Hollow shaft is a vitals on isolator, by hollow shaft, the driving torque of actuating motor is passed to the meshing gear of starter, realizes the start-up function of starter.The processing and fabricating of current this isolator hollow shaft generally all adopts following process: raw material after heat treatment, utilizes mould by solid billet cold moudling, forms the blank of hollow shaft, then processes the endoporus in hollow shaft with drilling machine.But because this processing method work efficiency is low, cause production cost higher, be unfavorable for enterprise's raising productivity effect.

Summary of the invention

The existing defect of processing method for above-mentioned hollow shaft of the present invention, provides a kind of method of quick production and processing isolator hollow shaft in batch.

The present invention realizes by following manner:

A kind of preparation method of isolator hollow shaft, comprise blank is annealed, softened and process by cold-extrusion technology requirement, make it hardness in HBllO mono-150 scopes, carry out subsequently descale, pickling, cleaning, and saponification liquor in saponification, by the cold model extrusion of forcing press, to after moulding and through the hollow shaft of machining, heat-treat again, complete the process of hollow shaft, it is characterized in that: blank used is sleeve pipe, the process that sleeve pipe shapes hollow shaft comprises following three steps:

A: canular blank is partly inserted on interior tringle, utilize forcing press that blank is pressed into the first mould, the front end that makes blank to required size, forms the first segment of hollow shaft in the first mould inner diameter reductions;

B: in the second mould, blank is further pushed, make blank form the 3rd joint projection of hollow shaft at the second mould 1b tail end;

C: the 3rd joint projection to blank tail end in the 3rd mould is drawn, and forms the 3rd joint of hollow shaft.

Due to technical scheme provided by the present invention, utilize sleeve pipe as blank, by technical process such as the draw, stretchings, the process of hollow shaft is simplified, have that work efficiency is high, moulding is fast, the advantage that production cost is low, so Ke Shi manufacturing enterprise improves productivity effect greatly.

Accompanying drawing explanation

Figure l is the process schematic diagram of isolator hollow shaft first segment;

Fig. 2 is the extrusion process schematic diagram of isolator hollow shaft the 3rd joint;

Fig. 3 is the process schematic diagram of isolator hollow shaft the 3rd joint.

The specific embodiment

First to canular blank 3 to be processed anneal, softening processing, make it hardness in HBHO mono-150 scopes, carry out subsequently descale, pickling, cleaning, and saponification liquor in saponification.

Recycle first pair of mould 2a, canular blank 3 half to be processed is inserted on interior tringle 1, utilize forcing press to carry out the draw of blank 3, make the reduced of blank 3 front ends to required size, form the first segment (as Fig. 1) of hollow shaft.

Blank 3 demouldings of first segment machine-shaping will be completed, use the 3rd joint extruding (Fig. 2) that second pair of mould 2b carries out hollow shaft instead, change again Third Mate's mould 2c, to drawing and expand crowded through the prominence forming on blank 3 in second operation work, form the 3rd joint (Fig. 3) of hollow shaft, on blank 3 without drawing and expanding and squeeze the second section that place becomes hollow shaft.

The hollow shaft that completes moulding is heat-treated, complete the making of isolator hollow shaft.

Claims

1. the preparation method of an isolator hollow shaft, comprise blank (3) is annealed, softened and process by cold-extrusion technology requirement, make it hardness in HBllO mono-150 scopes, carry out subsequently descale, pickling, cleaning, and saponification liquor in saponification, by the cold model extrusion of forcing press, to after moulding and through the hollow shaft of machining, heat-treat again, complete the process of hollow shaft, it is characterized in that: blank used (3) is sleeve pipe, and the process that sleeve pipe shapes hollow shaft comprises following three steps:

A: canular blank is partly inserted in to interior tringle (1) upper, utilize forcing press that blank (3) is pressed into the first mould (2a), the front end that makes blank (3) to required size, forms the first segment of hollow shaft in the first mould (2a) inner diameter reductions;

B: in the second mould (2b), blank is further pushed, make blank (3) form the 3rd joint projection of hollow shaft at the tail end of the second mould (2b);

C: the 3rd joint projection to blank (3) tail end in the 3rd mould (2c) is drawn, and forms the 3rd joint of hollow shaft.