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Technological mandrel and method for manufacturing squirrel-cage rotor by using same

A process and squirrel cage technology, applied in the field of process mandrels, can solve the problems of low surface flatness of the shaft hole, reduction of the cohesion area, and decreased reliability of the combination of the rotor core and the shaft.

Inactive Publication Date: 2011-08-24
SHANGHAI REGAL BELOIT & JINLING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem existing in the prior art is: the flatness of the surface of the shaft hole is relatively low, and reaming is still required to make the surface quality and size meet the requirements
However, the cohesion area of ​​the rotor inner circle 21a after reaming is reduced by 40%-50%, which reduces the reliability of the combination of the rotor core and the shaft

Method used

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  • Technological mandrel and method for manufacturing squirrel-cage rotor by using same
  • Technological mandrel and method for manufacturing squirrel-cage rotor by using same
  • Technological mandrel and method for manufacturing squirrel-cage rotor by using same

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Embodiment Construction

[0021] see figure 1 and figure 2 In order to better understand the technical solution of the present invention, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings:

[0022] see figure 1 and figure 2 , the process mandrel 1 includes a "sub-mandrel" part 11 with a convex key part 111 and a "mother mandrel" part 12 with a smooth cylindrical surface, and the "sub-mandrel" part 11 and the "mother mandrel" The parts 12 are fitted together by grooves with wedge-shaped slopes 13 to form self-locking; the wedge-shaped slopes 13 are parallel to the axial direction of the process mandrel 1 .

[0023] In a preferred solution, the groove inclination angle of the wedge-shaped slope 13 between the "sub-spindle" part 11 and the "master mandrel" part 12 is about 10 degrees. The process mandrel is made of quenched and tempered structural steel.

[0024] The using method of described process mandrel is:

[00...

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Abstract

The invention discloses a technological mandrel in an aluminum casting process of a squirrel-cage rotor of an asynchronous motor, and a method for manufacturing the squirrel-cage rotor by using the technological mandrel. The technological mandrel is called as a primary and secondary mandrel; the technological mandrel consists of a secondary mandrel part with convex keys and a primary mandrel which takes a smooth cylindrical surface as a main body structure; the secondary mandrel part and the primary mandrel part are matched with each other through a groove with a wedged oblique surface; and the direction of the wedged oblique surface is parallel to the axial direction of the rotor. According to the technical scheme of the invention, the flatness and linearity of the cylindrical surface in the inner hole of the aluminum cast rotor are guaranteed; and the squirrel-cage rotor manufactured in thermal jacket or cold pressing way can be prevented from reprocessing of the inner hole, and the labor cost and expenditure consumed by a cutter are reduced. For the occasion for producing the squirrel-cage rotor by virtue of common casting devices, by utilizing the method in invention, the products suitable for precision demands can be produced.

Description

technical field [0001] The invention relates to a process mandrel used in the aluminum casting process of a squirrel-cage rotor of an asynchronous motor and a method for manufacturing a squirrel-cage rotor using the same. Background technique [0002] In the aluminum die-casting process of the squirrel-cage motor rotor on ordinary die-casting equipment, a specified number of rotor punches 2a must be fitted on the cast aluminum mandrel 1a with spiral convex keys that match the punched shaft holes. Aluminum die-casting process can be implemented. The spiral convex key 111a on the mandrel evenly displaces each rotor punch 2a according to the design requirements, so that the slope formed by the conductive aluminum strips of the squirrel-cage rotor 1a in the circumferential direction meets the design requirements; at the same time, the outer circle of the mandrel 11a is matched with the shaft hole of each rotor punch, and a fit gap of 0.06-0.10mm is formed between the outer circ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/22H02K15/02
Inventor 邱万根赵清
Owner SHANGHAI REGAL BELOIT & JINLING
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