Clamp for machining plastic impeller of water pump for automobile engine

Abstract

The invention provides a clamp for machining a plastic impeller of a water pump for an automobile engine. The clamp comprises a backboard, a tensioner column and a screw, wherein the tensioner column is formed by two or more than two tensioner pieces, and one end of the tensioner column is fixedly connected with the center of one side of the backboard; the other end of the tensioner column is provided with internal threads, and the screw is provided with external threads; and when the screw is turned into the internal threads of the tensioner column through the external threads, the diameter of the tensioner column increases. The clamp provided by the invention can ensure the profile control and the concentricity of the plastic impeller of the water pump for the automobile engine, improves the precision of the outer circle and the tapered surface of the plastic impeller of the water pump for the automobile engine, reduces the runout of the impeller in rotation, and improves the rotation precision of the impeller.

Description

technical field [0001] The invention relates to a clamp for machine tools, in particular to a clamp for processing plastic impellers of automobile engine water pumps. Background technique [0002] The water pump is an important part of the engine cooling system. Its function is to pump the coolant, so that the coolant flows quickly in the cooling water channel of the engine, so as to take away the heat generated when the engine is working and maintain the normal operating temperature of the engine. The water pump used in the automobile engine is a centrifugal water pump, which is composed of a housing, an impeller, a bearing, a pump shaft, a water seal, and a drive pulley. The impeller is the core component of the water pump. It is driven by the motor to rotate, so that a vacuum is generated in the middle of the impeller, and water will flow into the vacuum (on the surface, the impeller continuously sucks water in), and then the water is discharged through the high-speed rot...

AI Technical Summary

Problems solved by technology

[0003] In the process of producing plastic impellers of automobile engine water pumps by injection molding machines, due to the small precision of the outer circle and conical surface of the plastic impellers of automobile engine water pumps, the profile and coaxiality of the produced plastic impellers of automobile engine water pumps are unqualified. The runout of the end face exceeds the specified range, which will cause vibration when the impeller rotates, and even affect the service life of the centrifugal pump

[0004] Therefore, it is necessary to further finish the outer circle and conical surface of the plastic impeller of the automobile engine water pump produced by the injection molding machine, which needs to be completed by using machine tools and fixtures. For the role of the impeller, due to the special shape of the plastic impeller of the water pump of the automobile engine, it is difficult to clamp it with a general fixture. Difficult to guarantee

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