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Cold xtrusion manufacturing method of cylindrical commutator

A manufacturing method, a cylindrical technology, applied in the manufacturing field of cylindrical commutators, which can solve problems affecting the performance of motors, poor outer roundness of commutators, complex sheet arrangement procedures, etc., to improve material utilization and production efficiency , Small radial runout, uniform arrangement of sheets

Inactive Publication Date: 2006-06-14
ZHEJIANG GREATWALL COMMUTATOR
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AI Technical Summary

Problems solved by technology

This sheet arrangement process is complex and cumbersome, with low production efficiency and high cost. At the same time, it needs to be manually operated by personnel, so that there is a gap between the commutator sheet and the sheet arrangement device, resulting in a large radial runout of the commutator semi-finished product during the outer circle process. , so that the outer roundness of the commutator is poor, which affects the performance of the motor

Method used

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  • Cold xtrusion manufacturing method of cylindrical commutator
  • Cold xtrusion manufacturing method of cylindrical commutator
  • Cold xtrusion manufacturing method of cylindrical commutator

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Embodiment Construction

[0013] The cold extrusion manufacturing method of the cylindrical commutator of the present invention is as follows: firstly, the copper pipe (using a cutting machine) that is not much different from the outer diameter of the required commutator is cut into a length that is not much different from the length of the commutator segment of the product. Cylindrical tubing (such as figure 1 shown), after annealing, the cylindrical pipe (using a 100T hydraulic press and a special die for cold extrusion) is cold-extruded to form a double "7" cross-section (one positive and one reverse "7" ) Integral commutator segment body (such as figure 2 shown), its inner wall has the same number of internal teeth with a cup-shaped cross-section as the commutator segment (such as image 3 shown), to increase the contact area between the commutator piece and the molding compound, so that the mechanical strength of the commutator is improved; then it is made into a cylinder through pressing, curin...

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Abstract

A cold extruding technology for manufacturing the cylindrical commutator of motor includes such steps as providing a copper pipe, cutting short, annealing, cold extruding to obtain a shaped blank, pressing, solidifying, machining internal hole, turning external circle, milling slots and polishing.

Description

1. Technical field [0001] The invention relates to a method for manufacturing a cylindrical commutator for an electric motor. 2. Background technology [0002] Existing commutators for motors are generally divided into two types: cylindrical commutators and end face commutators. The manufacturing method of cylindrical commutators is generally a sheet type, and the process is: first, roll and anneal the wire rod , drawing, and then the drawn wire is punched into a single commutator piece, and then the commutator is made into a commutator through the processes of sheet arrangement, pressing, curing, inner hole processing, outer circle turning, slot milling, and polishing. finished product. [0003] Among them, the "drawing and punching" process is to draw the rolled wire (also known as ladder row) into a "I"-shaped wire (that is, the two ends of the wire are asymmetrical: one long and one short), and then punch The commutator segment is a single piece with a dovetail-shaped ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P13/00B21C23/02
Inventor 杨积锡林祥清张学敏杨林飞
Owner ZHEJIANG GREATWALL COMMUTATOR
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