Positioning jig used for press fitting of core shaft of cast-aluminum rotor

Abstract

The invention relates to a positioning jig used for press fitting of a core shaft of a cast-aluminum rotor. The positioning jig includes a positioning flat plate, a connecting flat plate and a sleeve pipe, an upper end of the sleeve pipe is fixedly equipped with the connecting flat plate, a lower end is fixedly equipped with the positioning flat plate, a middle part of the positioning flat plate is provided with an opening communicated with the sleeve pipe, the diameter of the positioning flat plate is greater than that of a shaft hole of the cast-aluminum rotor, screw counter bores are arranged on the connecting flat plate, the screw counter bores are equipped with screws, the outer side of the sleeve pipe is uniformly provided with at least one auxiliary plate, and lifting holes are formed on the auxiliary plates. The positioning jig used for press fitting of the core shaft of the cast-aluminum rotor has the beneficial effects that: an integrated design is adopted, namely, two planes are connected together through the sleeve pipe and the auxiliary plates, thereby ensuring a behavior error in press fitting of the core shaft in the cast-aluminum rotor; knock traces and scratches on the surface of the core shaft are avoided; functions of protecting the core shaft and positioning the core shaft are achieved; and in production, the core shaft can be press-fitted in the cast-aluminum rotor which newly comes out of a furnace after die casting, thereby achieving the purpose of press fitting at furnace temperature, saving energy and greatly improving work efficiency of workers.

Description

technical field [0001] The invention belongs to the field of tooling and moulds for motor manufacturing, and relates to a positioning fixture for press-fitting a mandrel of a cast aluminum rotor, and is especially suitable for press-fitting a mandrel of a cast aluminum rotor after die-casting while it is hot. Background technique [0002] The motor refers to an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction. The rotating part of the motor is called the rotor, which is composed of rotor core, rotor winding, rotating shaft and fan. The rotor winding is not made of insulated wires, but a three-phase asynchronous motor that is welded by aluminum or copper bars and short-circuit rings is called a squirrel-cage motor. Small and medium-sized squirrel-cage asynchronous motors are manufactured by casting aluminum, and the rotor conductor, short-circuit ring and fan are cast into one body, which ...

AI Technical Summary

Problems solved by technology

However, due to the lack of special equipment, it is impossible to make full use of the continuous heat release time of cast aluminum solidification after die-casting. For example, design a special positioning fixture that can press the mandrel into the iron core, and achieve continuous solidification of cast aluminum after die-casting. The purpose of pressing the mandrel into the iron core during the heat dissipation time, saving energy waste caused by secondary heating and improving work efficiency is the purpose of the invention

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