CN100528401C

CN100528401C - Planar channel commutator integrated cold forging method and mould thereof

Info

Publication number: CN100528401C
Application number: CNB2005100066781A
Authority: CN
Inventors: 卢险峰; 蔡琨; 李湖峰
Original assignee: Nanchang University
Current assignee: Nanchang University
Priority date: 2005-01-26
Filing date: 2005-01-26
Publication date: 2009-08-19
Anticipated expiration: 2025-01-26
Also published as: CN1644269A

Abstract

A cold-forge technology for integrally manufacturing the slotted flate commutator includes such steps as the first cold forging to form the vertical slots on the main body of commutator, and the second cold forging for forming the transverse slots and planes of said main body. The die set for the first cold forging is composed of upper die sleeve, punching head, mandrel, female die and lower die sleeve. The die set for the second cold forging consists of upper die sleeve, punching head, mandrel upper female die, lower die sleeve, lower female die, female sleeve, etc.

Description

Plane tank commutator integral cold forging manufacture method and mould

Technical field

The production field of the metal system of the invention belongs to engine commutator and like parts thereof relates to cold-forging technique and mould design in the metal forming technology.

Background technology

Engine commutator is a vitals on direct current generator and the alternating-current commutator motor armature, cylindrical shape or disc part that the many copper sheets that separated by mica sheet are formed.Traditional manufacture process of existing commutator is: wire rod-drawing-annealing-wire drawing (4 passage)-punching press is cut off (one-tenth monolithic)-deburring (getting rid of tube)-screening (with commutator segment and the staggered embedding row of mica sheet, line up circular and banding, form the body member of commutator)-suppress phenolic resins and curing-machining (groove milling etc.)-weldering embedding enamel-covered wire etc., obtain the commutator finished product then.

The manufacturing process of plane tank commutator equally still rests on existing traditional commutator manufacturing process, and traditional manufacture process of manufacture process and commutator is roughly the same.This traditional commutator manufacturing process exists many technical backwardnesss, and for example: manufacturing process is many, production procedure is long; The production equipment that takies is many, frock quantity is many, production site is big; Stock utilization is low; The workpiece wearability is not enough; Some operation labor strength is big, and some operation is that labor intensive is produced or the like.

In recent years, trend that the manufacturing process that commutator falls behind is reformed has appearred both at home and abroad, proposed to adopt the manufacture method of advanced accurate cold-press moulding technology such as cold stamping, cold extrusion, cold forging, and proposed different technical solutions at dissimilar commutators." manufacture method of a kind of cold extrusion commutator end face and products thereof (publication number is 1391319A) proposes to squeeze out earlier the commutator end, then inside and outside circle is carried out turning, the method for groove milling processing slice pawl again " disclosed in the Chinese invention patent communique; A kind of " band step tank commutator integral cold forging manufacture method " (publication number is CN1403226A) also disclosed, proposed to be compounded in the mold cavity technical scheme of disposable cold-forging forming band step grooved commutator assembly by operation is out of shape in extruding, jumping-up, hole enlargement, be pressed into etc. substantially.Publication number is also to have proposed an a kind of cold-forging forming " plane hook-type commutator integral cold forging forming method " in the patent application of CN1546279A, goes out the commutator body by cold forging with the monolithic molding of thin gross weight brace pawl.

Summary of the invention

The objective of the invention is classical production process at another kind of (structural design is special) plane tank commutator body, a kind of manufacturing technique method and mould design thereof by adopting the cold forging technology proposed, to overcome the deficiency of the existing production technology of such commutator.

The objective of the invention is to realize by following approach.

The technical process of commutator of the present invention is: (1) cuts into pipe with copper pipe, as shown in Figure 2; (2) pipe is placed the mould of the first road cold forging operation, squeeze distortion by cutting, the straight trough of the commutator body that is shaped, as shown in Figure 3; (3) will be shaped the blank of straight trough is placed in the mould of the second road cold forging operation through annealing, squeezes the distortion translot that is shaped by cutting, jumping-up and indentation out-of-plane and gross weight simultaneously, and the translot and the plane of the commutator body that is shaped are referring to Fig. 4.The body member of foregoing plane tank commutator so just has been shaped.

And then,, promptly obtained plane of the present invention tank commutator finished product through operations such as also curing of compacting phenolic resins of the prior art, machining (groove milling etc.), weldering embedding enamel-covered wires with the commutator body member that integral cold forging is shaped and.

The said mould of the present invention, be meant the cold forging die of first and second twice (cover) cold forging operation, wherein the mould of the first road cold forging operation as shown in Figure 5, pipe is placed die 5, drift 2 is descending, mandrel 3 inserts pipe and enters in the die 5, die 5 is for to have and the corresponding dead slot structure of the straight trough of commutator body, squeeze distortion by cutting of mould, make the pipe blank 4 that is shaped, promptly be shaped the straight trough of commutator body, that is shape as shown in Figure 3,1 among Fig. 5,2 is respectively Upper Die-sleeve and lower die-sleeve.

The mould of the second road cold forging operation as shown in Figure 6, the blank 4 of the commutator body straight trough that is shaped inserted be inlaid with corresponding straight trough and count in the lower cavity die 7 of indent sheet 8, indent sheet 8 in the lower cavity die 7 is corresponding with the straight trough of blank 4, and the translot of the commutator body that is shaped, when being advanced in upper cavity die 5 and the lower cavity die 7 under the drift 2 (with mandrel 3), the translot of commutator body and jumping-up and indentation out-of-plane and gross weight have been shaped.By above process just be shaped the body member of the said plane of the present invention tank commutator.

In the mould of the said second road cold forging operation of the present invention, indent sheet 8 is independent processing, is embedded in the die 7, also both can be processed into an overall structure.

The present invention compares with existing traditional commutator manufacturing process, and advance is clearly arranged, and its manufacturing process is few, production procedure is short, only need twice cold forging operation, the commutator body member that just can be shaped, obviously its production equipment that takies and frock quantity is few, production site is little; The stock utilization height; The workpiece wearability is good; Alleviated working strength of workers, and transferred technology-intensive production to by labor-intensive.

Description of drawings

Fig. 1 is a plane tank commutator body schematic diagram, and 1-1 is end face convex tendon (gross weight) among the figure, and 1-2 is a translot, and 1-3 is a boss, and 1-4 is a straight trough.

Fig. 2 is the pipe schematic diagram.

Fig. 3 is the be shaped schematic diagram of the blank that of first procedure, and promptly the end straight trough that has been shaped is indeformable in mould on most of length pipe.

The schematic diagram of the commutator body member that Fig. 4 for second operation work is shaped, the translot and link to each other of promptly being shaped, and end face jumping-up and press out the gross weight shape simultaneously with the good straight trough of former shaping.

Fig. 5 is the front view of the cold-forging die of first procedure.1 is Upper Die-sleeve among the figure, and 2 is drift, and 3 is mandrel, and 4 is blank, and 5 is die, and 6 is lower die-sleeve.

Fig. 6 is the front view of the cold-forging die of second operation work.1 is Upper Die-sleeve among the figure, and 2 is drift, and 3 is mandrel, and 4 is workpiece, and 5 is upper cavity die, and 6 is the counterdie overcoat, and 7 is lower cavity die, and 8 is the indent sheet, and 9 is die case.

Fig. 7 is for the pipe of the embodiment of the invention and the part drawing of the commutator body member that of being shaped, and Fig. 7 left side is a pipe, and Fig. 7 right side is the view of commutator body member.Illustrated embodiment has 23 straight troughs, is 23 commutator segments and forms, be i.e. n=23 in Fig. 7 right side.

The specific embodiment

The present invention can be further described by following examples.

Embodiment.In the present embodiment, described plane tank commutator is made up of 23 commutator segments.

Its concrete technological approaches is: the standard copper tube that (1) is good with design alternative (soft attitude Φ 25 * 3.5) cuts into the pipe of 25 millimeters long, shown in Fig. 7 left side;

(2) this pipe is placed the die 5 of the die drawing 5 of the first road cold forging operation, mandrel 3 inserts in the middle of the pipe, because die 5 is for to have and the corresponding dead slot structure of the straight trough of commutator body, when drift is advanced into for 2 times in the die 5, squeeze distortion by cutting of mould, just make the pipe blank 4 that is shaped, the straight trough of commutator body promptly is shaped, that is shape as shown in Figure 3, this moment, commutator body member 23 straight troughs that have been shaped and made the most of length of pipe not produce distortion in this mould.

(3) blank 4 that will anneal inserts and is inlaid with in the lower cavity die 7 of 23 indent sheets 8, when being advanced in upper cavity die 5 and the lower cavity die 7 under the drift 2 (with mandrel 3), and 23 translots of the commutator body that is shaped, jumping-up and indentation out-of-plane and gross weight simultaneously.The body member of the said plane of the present invention tank commutator so be shaped.

(4),, 23 commutator segment plane tank commutator finished products have promptly been obtained to have through the also curing of compacting phenolic resins, machining (groove milling etc.), weldering embedding enamel-covered wire operation again with the commutator body member.

Claims

1, a kind of plane tank commutator integral cold forging manufacture method, making by the body member of commutator, the press curing of phenolic resins, machining, weldering embedding enamel-covered wire operation is formed, the body member that it is characterized in that commutator is shaped by twice cold forging operation, earlier pipe is placed the mould of the first road cold forging operation, squeeze distortion by cutting, the straight trough of commutator body is shaped, the blank of straight trough of will being shaped then is placed in the mould of the second road cold forging operation through annealing, be out of shape the translot that is shaped by cutting to squeeze, while jumping-up and indentation out-of-plane and gross weight, the translot and the plane of the commutator body member that is shaped.

2, a kind of mould that is used for the described plane of claim 1 tank commutator integral cold forging manufacture method, it is characterized in that forming by twice cold forging process mould, the mould of the first road cold forging operation is by Upper Die-sleeve, drift, mandrel, die, parts such as lower die-sleeve are formed, wherein die has and the corresponding dead slot structure of the straight trough of commutator body member, the mould of the second road cold forging operation is by Upper Die-sleeve, drift, mandrel, upper cavity die, the counterdie overcoat, lower cavity die, the indent sheet, parts such as die case are formed, its medium pressure tank sheet is embedded in the lower cavity die, and the indent sheet is corresponding with the straight trough of blank.

3, mould according to claim 2 is characterized in that lower cavity die and indent sheet are made into overall structure.