CN1258575A

CN1258575A - Forming process for pawl pole of automobile generator

Info

Publication number: CN1258575A
Application number: CN 99120680
Authority: CN
Inventors: 吴宝根; 张伯年
Original assignee: LONGCHENG PRECISION FORGING CO Ltd WUJIN
Current assignee: Jiangsu Longcheng Precision Forging Co., Ltd.
Priority date: 1999-12-29
Filing date: 1999-12-29
Publication date: 2000-07-05
Anticipated expiration: 2019-12-29
Also published as: CN1069853C

Abstract

The pawl pole forming process includes cutting material, hot forging in open die, cutting overlap, hot forging in closed die, fine machining, surface lubrication and other steps. The present invention combines the advantages of hot forging and cold forging, forging in open die and closed die as well as die forging and machining, and can machine pawl pole with stable chemical components and no defect in a relatively short process.

Description

Forming process for pawl pole of automobile generator

The present invention relates to the production method of the pawl utmost point that a kind of automobile current generator uses.

At present, the domestic production automobile generator claw pole is with hot investment casting and Sheet Metal Forming Technology production, Sheet Metal Forming Technology is subjected to the restriction of need with large-scale forging equipment, defectives such as the as easy as rolling off a log generation shrinkage cavity of the pawl of hot investment casting, loose, slag and chemical analysis instability, and cause easily that magnetic conductance power is inhomogeneous, magnetic property descends, influence the dynamic balancing of rotor, and finally cause generator for electricity generation efficient to reduce.

The objective of the invention is to propose a kind of forming process for pawl pole of automobile generator in order to overcome above-mentioned defective.

Technical scheme of the present invention is as follows: forming process for pawl pole of automobile generator has following technological process: a, and the raw material blanking as required, is sawn into raw pieces with raw material; The hot forging of b open type drops into raw pieces and is heated to 890-910 ℃ in the heating furnace, adopts the open type hot forging then, with raw pieces preformed, forms preformed member; C cuts overlap, and many peripheries of the preformed member that the open type hot forging forms leave overlap, and this procedure is with the overlap excision, forms profiled member; D, the enclosed hot forging drops into heating furnace with profiled member and is heated to 890-910 ℃ once more, adopts the enclosed hot forging with the profiled member final molding then, forms final shaping unit spare; E, fine finishining according to the product size needs, is carried out fine finishining to reach the product size requirement to plane, pawl utmost point back, claw lateral surface or the claw medial surface of final shaping unit spare; F, surface lubrication is handled, and is used to increase the extremely lubricating coefficient on surface of pawl.

Optimum heating temperature in the aforesaid heating furnace is 900 ℃.

Further, after surface lubrication is handled, adopt cold extrusion, but form the groove of rule, on claw, form the pawl back of the body groove that increases its intensity at pawl utmost point positive and negative aforesaid.

Further, aforesaid surface lubrication is handled, and adopts the phosphatization saponification to handle means.

Another kind of surface lubrication processing means in the technical solution of the present invention are for adopting surface-coated polymeric lubricant layer.

The present invention combines forge hot and cold forging, open type and enclosed, die forging and mach advantage in one, makes the moulding of the pawl utmost point, forming claw polaron ingredient stability, defectives such as no shrinkage cavity, slag blister with short production procedure.

Below in conjunction with description of drawings most preferred embodiment of the present invention:

Fig. 1 is the schematic diagram of raw pieces 1 among the embodiment;

Fig. 2, Fig. 3 are the schematic diagram of preformed member 2, and Fig. 3 is the A-A cross-sectional schematic of Fig. 2;

Fig. 4 is the enclosed hot forging schematic diagram of profiled member 3;

Fig. 5 is the schematic diagram of final shaping unit spare 4 after the enclosed hot forging, and Fig. 6 is the B-B cross-sectional schematic of Fig. 5, and Fig. 7 is the schematic diagram of C claw 42 after vertical rotation among Fig. 5;

Fig. 8 is final shaping unit spare 4 fine finishining schematic diagrames;

Fig. 9-Figure 13 is a cold extrusion rear solid end utmost point schematic diagram, and Figure 11 is the schematic diagram of D claw after rotation among Fig. 9.

As required, with sawing machine raw material are sawn into raw pieces 1, again raw pieces 1 is dropped in the heating furnace and be heated to 900 ℃, adopt the open type hot forging then, with raw pieces 1 preformed, form preformed member 2, the overlap 21 that preformed member 2 peripheries are left excises, form profiled member 3, profiled member 3 is dropped into heating furnace be heated to 900 ℃ once more, adopt the enclosed hot forging with profiled member 3 final molding then, form final shaping unit spare 4, adopt the enclosed hot forging herein, be easy to make claw 42 front end moulding, make its unlikely generation shrinkage cavity, defective such as loose, according to the product size needs, with the pawl utmost point back plane 41 of engine lathe to final shaping unit spare 4, the medial surface of the lateral surface of claw 42 or claw 42 carries out fine finishining to reach the product size requirement, then the pawl utmost point being carried out surface lubrication handles to increase the extremely lubricating coefficient on surface of pawl, can adopt surface-coated polymeric lubricant layer, and then oven dry, after surface lubrication is handled, adopt cold extrusion, but, on claw 42, form the pawl back of the body groove 52 that increases its intensity at the groove 51 of pawl utmost point positive and negative formation rule.

In the foregoing description, if blowdown post processing compliance with environmental protection requirements, the phosphatization saponification means that also can adopt are handled in surface lubrication.

Claims

1, forming process for pawl pole of automobile generator, it is characterized by: have following technological process: a, the raw material blanking, as required, raw material are sawn into raw pieces (1): the hot forging of b open type, with being heated to 890-910 ℃ in raw pieces (1) the input heating furnace, adopt the open type hot forging then, with raw pieces (1) preformed, form preformed member (2); C cuts overlap, and many peripheries of the preformed member (2) that the open type hot forging forms leave overlap (21), and this procedure is with overlap (21) excision, forms profiled member (3); D, the enclosed hot forging drops into heating furnace with profiled member (3) and is heated to 890-910 ℃ once more, adopts the enclosed hot forging with profiled member (3) final molding then, forms final shaping unit spare (4); E, fine finishining according to the product size needs, is carried out fine finishining to reach the product size requirement to plane, pawl utmost point back (41), claw (42) lateral surface or claw (42) medial surface of final shaping unit spare (4); F, surface lubrication is handled, and is used to increase the extremely lubricating coefficient on surface of pawl.

2, forming process for pawl pole of automobile generator according to claim 1 is characterized in that: described heating-up temperature is 900 ℃.

3, forming process for pawl pole of automobile generator according to claim 1, it is characterized in that: described after surface lubrication is handled, adopt cold extrusion, but form the groove (51) of rule, go up at claw (42) and form the pawl back of the body groove (52) that increases its intensity at pawl utmost point positive and negative.

4, according to claim 1 or 2 or 3 described forming process for pawl pole of automobile generator, it is characterized in that: described surface lubrication is handled, and adopts the phosphatization saponification to handle means.

5, according to claim 1 or 2 or 3 described forming process for pawl pole of automobile generator, it is characterized in that: described surface lubrication is handled, and adopts surface-coated polymeric lubricant layer means.