CN100349690C

CN100349690C - Pawl pole of automobile generator and its manufactura

Info

Publication number: CN100349690C
Application number: CNB2005100951722A
Authority: CN
Inventors: 庄晓伟; 徐进; 刘强
Original assignee: ZHUANG LONGXING
Current assignee: Jiangsu Longcheng Precision Forging Group Co.,Ltd.
Priority date: 2005-10-28
Filing date: 2005-10-28
Publication date: 2007-11-21
Anticipated expiration: 2025-10-28
Also published as: CN1772413A

Abstract

The present invention relates to a pawl pole of a generator of a car and the manufacturing technique thereof. The pawl pole of a generator of a car is provided with a magnetic yoke in the middle part of a bottom board, six or eight insulating varnish leading slots are homogeneously distributed on the circumference of the magnetic yoke, and six or eight coils for preventing rotation and bulge, and leading out wire casings of six or eight insulating wires are distributed on the bottom of the magnetic yoke. The manufacturing technique of the pawl pole of a generator of a car has the following technique steps: a. feeding; b. heating; c. upsetting; d. preforging; e. finish forging; f. cutting edge; g. magnetic annealing; h. cold shaping; i. fine machining. The equipment investment of the manufacturing technique of the pawl pole of a generator of a car of the present invention is less in the prior period, the service life of a mould is long, manufacturing cost is low, team output is high, and the appearance quality of a finished product is high without concave pits. The present invention has higher dimensional precision and form tolerance, and dynamic balance requirement of the finished product is assured. The alternating current electromotive force induced by an alternator of the pawl pole of the present invention is similar to sine waveform, and the electricity generation power of the alternator is high.

Description

The manufacturing process of claw pole for automobile generator

Affiliated technical field

The present invention relates to a kind of claw pole for automobile generator and manufacturing process thereof.

Background technology

Modern Car generally adopts air-conditioning, BBG, and automatically controlled door and window, electric elements such as electronic barbed chair, power consumption sharply rises.Alternating current generator is the critical component of automobile, is responsible for the power supply of automobile, and the configuration difference of car, power consumption demand are just different, and generator is just different, and the corresponding pawl utmost point is just different.Alternating current generator is installed in the next door of engine, by the engine driven rotary, thereby mechanical energy is converted into electric energy.Alternating current generator is made up of stator winding and rotor winding two parts, and the threephase stator winding is distributed on the housing by differing 120 degree each other, and the rotor winding is made up of two pawl utmost points.By excitation, two pawl utmost points form the N utmost point and the S utmost point when the rotor winding is connected direct current.The magnetic line of force is set out by the N utmost point, enters stator core through the air gap and returns the adjacent S utmost point.Rotor is in case rotation, and the rotor winding will cutting magnetic line, produces the electromotive force of mutual deviation 120 degree in stator winding, and promptly three-phase alternating current becomes direct current output through rectifier cell again.The motorcar alternator pawl utmost point is the main element that is used for forming rotating excitation field, and its shape and electromagnetic performance directly influence the induct waveform of AC electromotive force and the generating capacity and the noise of alternating current generator.

At present, the common process of domestic production claw pole for automobile generator is as follows:

1. hot investment casting: thus the as easy as rolling off a log generation shrinkage cavity of the pawl of this explained hereafter, loosen, be mingled with and defective such as chemical composition instability causes magnetic resistance to increase, electromagnetic performance is poor, thereby influence the power of generator, can't adapt to current automobile current generator volume will dwindle, the development trend that power will increase, and casting readily produces hard spot, is difficult for machined.

2. Sheet Metal Forming Technology: this technology must be used large-scale forging equipment, and early investment is bigger, and this technology can not produce the pawl utmost point of band yoke, must join a yoke in addition, thereby produce the assembling air gap, and magnetic resistance increases, and influences generator power.

3. hot forging adds fine-processing technique: Chinese patent CN1069853C discloses a kind of forming process for pawl pole of automobile generator, comprise raw material blanking, open type hot forging, cut overlap, enclosed hot forging, fine finishining, surface lubrication processing etc., the mode that this process using hot forging and fine finishining combine, the claw pole for automobile generator chemical analysis of producing is stable, no shrinkage cavity, slag blister etc.But this technology needs twice heating, and production cost is higher.

Summary of the invention

In order to overcome the deficiencies in the prior art, the invention provides a kind of claw pole for automobile generator and manufacturing process thereof, not only equipment investment is little for this technology, the end product quality height of forging, and can reduce production costs.With the pawl utmost point of the present invention, the alternating current generator AC electromotive force of inducting is similar to sinusoidal waveform, and the generated output of alternating current generator is big, is applicable to masses, benz, each big automobile current generator such as BMW.

The technical solution adopted for the present invention to solve the technical problems is: a kind of manufacturing process of claw pole for automobile generator is characterized in that having following processing step:

A. blanking;

B. heating; Raw pieces dropped into be heated to 1050 ℃～1100 ℃ in the heating furnace;

C. jumping-up; The raw pieces that heats with the crank press flat one-tenth jumping-up spare of upsetting, is removed surface scale;

D. blocking; Jumping-up spare is moved into preformed in the blocker of taking pore out of, adopt pawl to forge towards upper type, form pre-forging, pre-forging planform is: have base plate, be evenly distributed with six or eight beak shaped pawls on base plate, be provided with a yoke in the middle of the base plate;

E. finish forge; Pre-forging is put into the precision forging die moulding, form finish forge spare, finish forge spare planform is: have base plate, on base plate, be evenly distributed with six or eight beak shaped pawls, be provided with a yoke in the middle of the base plate, on the circumference of yoke, be evenly distributed with six or eight insulated paint drainage troughs, on the bottom of yoke, be distributed with the wire casing of drawing of six or eight coil anti-rotation projections and six or eight insulated wires;

F. cut edge; Overlap excision with finish forge spare;

G. magnetic annealing; The finish forge spare of excision overlap is put into annealing furnace anneals;

H. cold shaping; Inclined-plane in yoke cylindrical, inner plane and the pawl of the whole pawl utmost point is for subsequent fine processing provides benchmark;

I. fine finishining; The pawl utmost point after the cold shaping is carried out machined, make finished product.

The invention has the beneficial effects as follows that with the pawl utmost point of the present invention, the alternating current generator AC electromotive force of inducting is similar to sinusoidal waveform, the generated output of alternating current generator is big, is applicable to masses, benz, each big automobile current generator such as BMW.The manufacturing process of claw pole for automobile generator of the present invention adopts jumping-up technology, removes surface scale, makes product appearance quality height, no pit, finished size precision height; Blocking is that pawl forges up, and mould has venthole, can adopt the common forging equipment of less tonnage, as friction press; During finish forge each pawl can both forge full, the dimensional accuracy height of pawl, the good dynamic balance of final finished part; Finish forge again behind blocking, class's output height, die life, height reduced die cost; Jumping-up, blocking and three operations of finish forge form streamline, adopt once heating, have reduced heating cost; Adopt cold trimming, eliminated the distortion of finish forge and side cut,, guaranteed the dimension precision requirement and the form tolerance requirement of finished product, guaranteed the requirement for dynamic balance of finished parts for subsequent fine processing provides benchmark.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the structural representation of claw pole for automobile generator of the present invention.

Fig. 2 is the A-A cutaway view of Fig. 1.

Fig. 3 is a process chart of the present invention.

Fig. 4 is the structural representation of raw pieces among the present invention.

Fig. 5 is the structural representation of jumping-up spare among the present invention.

Fig. 6 is the structural representation of pre-forging among the present invention.

Fig. 7 is the cutaway view of Fig. 6.

Fig. 8 is the structural representation of finish forge spare among the present invention.

Fig. 9 is the cutaway view of Fig. 8.

Among the figure: 1. base plate, 2. pawl, 3. yoke, 4. insulated paint drainage trough, 5. coil anti-rotation projection is 6. drawn wire casing.

The specific embodiment

As Fig. 1, as shown in Figure 2 claw pole for automobile generator of the present invention, has base plate 1, on base plate 1, be evenly distributed with six beak shaped pawls 2, be provided with a yoke 3 in the middle of the base plate 1, be evenly distributed with six insulated paint drainage troughs 4 on the circumference of yoke 3, what be distributed with six coil anti-rotation projections 5 and six insulated wires on the bottom of yoke 3 draws wire casing 6.

The manufacturing process of claw pole for automobile generator of the present invention as shown in Figure 3 has following processing step:

A. blanking; Select the good raw material 08# mild steel of electromagnetic performance for use,, raw material are sawn into as shown in Figure 4 raw pieces with sawing machine according to the weight requirement;

B. heating; Raw pieces dropped into be heated to 1050 ℃～1100 ℃ in the heating furnace; We are through repetition test, the raw pieces heating-up temperature is fixed between 1050 ℃～1100 ℃, can guarantee only needs heating once, its interior tissue was single austenite when raw pieces was carried out jumping-up, blocking, finish forge on streamline, raw pieces still has good plasticity during finish forge, makes each pawl of finish forge spare can both forge full, the dimensional accuracy height of pawl, the good dynamic balance of final finished part;

C. jumping-up; The raw pieces that heats with the crank press flat one-tenth jumping-up spare as shown in Figure 5 of upsetting, is removed surface scale;

D. blocking; Jumping-up spare is moved into preformed in the blocker of taking pore out of, adopt pawl to forge towards upper type, form as Fig. 6, pre-forging shown in Figure 7, owing to adopt pawl to forge towards upper type, and has venthole on the mould, therefore forging equipment can adopt the common forging equipment of less tonnage, as friction press;

E. finish forge; Pre-forging is put into the precision forging die moulding, form as Fig. 8, finish forge spare shown in Figure 9;

F. cut edge; Overlap excision with finish forge spare;

I. fine finishining; Machined is carried out at the yoke plane of the pawl utmost point after the cold shaping, the positions such as big plane, cylindrical and mesopore of the pawl utmost point, made finished product as shown in Figure 1 and Figure 2.

In the middle of the claw pole for automobile generator of the present invention, base plate a yoke that is used for laying coil is arranged, the coil anti-rotation projection of several tensioner coils that distributing on the bottom of yoke prevents that high speed rotation center line circle is loosening, thereby causes generator short circuit.The 08# mild steel that the raw material selection electromagnetic performance is good is made.The AC electromotive force that alternating current generator is inducted is similar to sinusoidal waveform, and generator for electricity generation power is big.The manufacturing process of claw pole for automobile generator of the present invention adopts jumping-up technology, removes surface scale, makes product appearance quality height, no pit, finished size precision height; Blocking is that pawl forges up, and mould has venthole, can adopt the common forging equipment of less tonnage, as friction press; During finish forge each pawl can both forge full, the dimensional accuracy height of pawl, the good dynamic balance of final finished part; Finish forge again behind blocking, class's output height, die life, height reduced die cost; Jumping-up, blocking and three operations of finish forge form streamline, adopt once heating, have reduced heating cost; Adopt cold trimming, eliminated the distortion of finish forge and side cut,, guaranteed the dimension precision requirement and the form tolerance requirement of finished product, guaranteed the requirement for dynamic balance of finished parts for subsequent fine processing provides benchmark.

Claims

1. the manufacturing process of a claw pole for automobile generator is characterized in that having following processing step:

A. blanking;

F. cut edge; Overlap excision with finish forge spare;