CN101488636A

CN101488636A - Commutator production process

Info

Publication number: CN101488636A
Application number: CNA2009100959116A
Authority: CN
Inventors: 许刚位
Original assignee: HUARUI ELECTRICAL APPLIANCE CO Ltd
Current assignee: Huarui Electrical Appliance Co., Ltd.
Priority date: 2009-02-19
Filing date: 2009-02-19
Publication date: 2009-07-22
Anticipated expiration: 2029-02-19
Also published as: CN101488636B

Abstract

A method for preparing a commutator is characterized in that: (1) blanking and drawing; (2) punching commutator bars; (3) washing the commutator bars; (4) punching mica plates for molding and the plates possess notches; (5) aligning the commutator bars and the mica plates; (6) compressing the commutator bars and the mica plates into a basal body for molding; (7) solidifying; (8) boring; (9) turning excircle; (10) disconnecting the notches, removing spare mica plates and then shaping an insulator groove; (11) milling a cable notch; wherein, the distance between the notches in the step (4) and the excircle after turning in step (9) is the depth of the radial insulator groove of the commutator. Compared with the prior art, the size of the insulator groove is guaranteed by the mica plates. When the mica plates are punched, the notch is pressed, thus the spare mica plates can be removed without milling after turning excircle, process procedures of milling the insulator groove are saved and the manufacturing process is more easy and simple.

Description

A kind of commutator production process

Technical field

The present invention relates to a kind of manufacture method of commutator.

Background technology

Tank commutator generally includes by a plurality of commutator segments and a plastic cement matrix that is used for fixing commutator segment to be formed, in the commutator matrix, be provided with a plurality of insulation tanks, dispose the commutator segment that mica sheet or electric insulation plastics come separating adjacent in this insulation tank, the setting of insulation tank is except preventing to be short-circuited between the adjacent commutator segment, mainly be in order to reduce the wearing and tearing of carbon brush, if there is not insulation tank, during commutator work, frictions alternately take place in these two kinds of unlike materials of carbon brush meeting and commutator segment and mica sheet (electric insulation plastics), quicken the wearing and tearing of brush, thereby reduce the useful life of carbon brush.

The molding process of tank commutator is generally in the prior art: row is drawn in the blanking of 1, carrying out commutator segment; 2, punching out commutator segment, mica sheet are sheared slivering; 3, vibration is cleaned commutator segment, is carried out the mica sheet punching out; 4, arrange commutator segment, carry out spacer insulator with mica sheet between the commutator segment; 5, will arrange good commutator segment circle pressure and put among the commutator matrix injection mo(u)lding; 6, solidify; 7, bore hole; 8, turning; 9, mill connecting groove, mill insulation tank; 10, be up to the standards.

In above-mentioned process for making, need on milling machine, process insulation tank after the commutator moulding, the mica sheet that milling is unnecessary, follow-up process for machining is just comparatively complicated, also there is such problem during insulation tank in processing in addition: because there is certain tolerance during in machine-shaping in mica sheet, when screening, cause the elasticity of sheet circle inconsistent, thereby when moulding, cause the existence of oblique sheet phenomenon easily, residual mica in the insulation tank after can causing processing, cause phenomenons such as noise is big, carbon brush rapid wear, influence the behavior in service of motor.

Summary of the invention

Technical problem to be solved by this invention is that a kind of commutator production process that need not can guarantee through machining the insulation tank size is provided at above-mentioned prior art present situation, and this commutator production process technology is simple, cost is lower.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: this commutator production process is characterized in that including following processing step:

[1], be raw material with the copper material, blanking is drawn into copper bar;

[2], punching out commutator segment on described copper bar;

[3], clean the described commutator segment that punching out obtains;

[4], mica sheet shears slivering and stamping-out moulding, and also punching out is formed with an indentation that can disconnect on described mica sheet;

[5], described commutator segment, mica sheet are carried out screening;

[6], described commutator segment and mica sheet are pressed in the commutator matrix, injection mo(u)lding is a commutator;

[7], solidify;

[8], bore hole;

[9], turning commutator cylindrical;

[10], disconnect described indentation, remove unnecessary mica sheet, insulation tank is shaped;

[11], mill connecting groove;

Wherein, indentation that forms in the described step [4] and the distance of commutator between the cylindrical that forms after the turning in the described step [9] are along described commutator insulation tank groove depth radially.

For the ease of breaking unnecessary mica sheet off with the fingers and thumb, can make things convenient for manually to disconnect indentation, in the described step [4], described mica sheet also extends a protuberance that is positioned at outside the described mica sheet side along described indentation, after turning processing, can pinch protuberance unnecessary mica sheet is disconnected from indentation.

In order further to improve working (machining) efficiency, reduce procedure of processing, in the described step [4], described indentation and described mica sheet can be one time punching molded, and promptly punching press forms indentation in the stamping-out mica sheet.

Compared with prior art, the invention has the advantages that: the insulation tank geometry and the size of commutator are guaranteed by mica sheet, in punching out mica sheet process, stamp out an indentation, make commutator behind size, unnecessary mica sheet can be got rid of without Milling Machine processing, save the processing step of Milling Process insulation tank, made the course of processing more simple; Simultaneously, because the mica sheet after the punching out is an integral body, commutator can easily get rid of unnecessary mica sheet by disconnecting indentation after turning, realize the one-shot forming of insulation tank, has solved thoroughly that the oblique sheet problem owing to mica sheet causes the residual phenomenon of mica in the insulation tank when Milling Process.The present invention has saved the mechanical processing steps of milling insulation tank, and the insulation tank moulding guarantees that by the mica sheet indentation reduced the commutator production cost, manufacturing process is more simple.

Description of drawings

Fig. 1 is the commutator structure cutaway view of the embodiment of the invention.

Fig. 2 is the structural representation after the mica sheet stamping-out of the embodiment of the invention is shaped.

Fig. 3 is the structural representation that the mica sheet of the embodiment of the invention is shaped at insulation tank.

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

Shown in Figure 1, be the commutator structure cutaway view of the embodiment of the invention.This commutator is a tank commutator, include the commutator segment 1 that the multi-disc space is provided with, and the matrix 2 that is used for fixing commutator segment, wherein, by mica sheet 3 at interval and form insulation tank, described matrix 2 adopts the engineering plastics injection mo(u)ldings between the adjacent commutator segment 1.

The commutator of present embodiment is realized by following processing step:

[2], punching out commutator segment on described copper bar;

[3], clean the described commutator segment 1 that punching out obtains;

[4], mica sheet 3 shears slivering and stamping-out moulding, and also punching out is formed with an indentation that can disconnect 31 on described mica sheet 3, as shown in Figure 2;

[5], described commutator segment 1, mica sheet 3 are carried out screening;

[6], described commutator segment 1 and mica sheet 3 are pressed in the commutator matrix 2, injection mo(u)lding is a commutator;

[7], solidify;

[8], bore hole;

[9], turning commutator 1 cylindrical, reach the commutator cylindrical 32 of dotted line position as shown in Figure 2;

[10], disconnect described indentation 31, break unnecessary mica strip 33 off with the fingers and thumb, obtain mica sheet structure as shown in Figure 3, insulation tank is shaped;

[10], mill connecting groove;

Wherein, indentation 31 that forms in the described step [4] and the distance of commutator between the cylindrical 32 that forms after the turning in the described step [9] are along described commutator insulation tank groove depth radially;

In the described step [4], described mica sheet 3 also extends a protuberance 34 that is positioned at outside described mica sheet 3 sides along described indentation 31, thereby the operator can pinch this protuberance 34 easily disconnects indentation 31, need not machining and can realize that insulation tank is shaped, the manufacturing process of whole commutator can be saved the one-time mechanical procedure of processing, can effectively avoid owing to oblique sheet problem causes the residual phenomenon of mica in the insulation tank.

Here, indentation 31 and mica sheet 3 are once punch formings simultaneously, to guarantee the depth of indentation 31 during punching press,, then just not disconnect easily before the turning if indentation 31 is too dark, influence the moulding of insulation tank, if indentation 31 is too shallow, then be difficult for breaking off with the fingers and thumb disconnected, also need remove unnecessary mica strip 33 by other instruments, therefore, the stamping-out to mica sheet is had relatively high expectations in the present embodiment.

Claims

1, a kind of commutator production process is characterized in that including following processing step:

[2], punching out commutator segment on described copper bar;

[3], clean the described commutator segment that punching out obtains;

[5], described commutator segment, mica sheet are carried out screening;

[7], solidify;

[8], bore hole;

[9], turning commutator cylindrical;

[11], mill connecting groove;

2, commutator production process according to claim 1 is characterized in that: in the described step [4], described mica sheet also extends a protuberance that is positioned at outside the described mica sheet side along described indentation.

3, commutator production process according to claim 1 is characterized in that: in the described step [4], and a drawing of described indentation and described mica sheet.