Outer circle turning liquid plastic core clamping device suitable for national IV air cylinder sleeve

Abstract

The invention provides an outer circle turning liquid plastic core clamping device suitable for a national IV air cylinder sleeve, which can clamp an air cylinder sleeve stably. A workpiece is stressed uniformly in the circumferential direction and is high in machining precision, and deforms slightly. The outer circle turning liquid plastic core clamping device comprises a machine tool main shaft; the machine tool main shaft is connected with a mandrel through a flange plate; a hydraulic oil cylinder is arranged in an inner cavity of the machine tool main shaft along the axis; a piston pin is arranged in the inner cavity of the machine tool main shaft along the axis; the hydraulic oil cylinder is connected with the piston pin through a hydraulic cylinder push rod; a communicating device cavity which extends to the outer surface of the mandrel is arranged in the inner cavity of the mandrel; a plurality of sections of expansion sleeves are arranged on the outer surface of the mandrel along the axial direction; the expansion sleeves coat the outer surface of the mandrel; the inner wall of each expansion sleeve is communicated with the communicating device cavity; the communicating device cavity is filled with liquid plastic.

Description

technical field [0001] The invention relates to production equipment for auto parts, in particular to a liquid-plastic clamping device for the outer circle of a vehicle, which is suitable for the national four cylinder liners. Background technique [0002] In order to implement the engine emission standard requirements proposed by the Ministry of Industry and Information Technology and the State Environmental Protection Administration, the Standardization Committee of the China Internal Combustion Engine Industry Association proposed that starting from 2015, the exhaust emission standards of road transportation vehicles will all meet the requirements of the National IV standards. The cylinder liner requirements also meet the National IV standard, especially the key dimensions and tolerances of the inner and outer circles of the cylinder liner are required to reach IT6 level. [0003] The wall thickness of the thin-walled cylinder liner is 1.5 to 3 mm. During the processing, ...

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Problems solved by technology

[0003] The wall thickness of the thin-walled cylinder liner is 1.5 to 3 mm. During the processing, the outer circle clamping device of the finishing car needs to be used. With the clamping device provided by the existing technology, the cylinder liner to be processed will be deformed due to uneven force, resulting in The shape and position tolerance of the outer circle of the cylinder liner does not meet the requirements (the roundness and straightness can only reach IT9 level), and the shape and position tolerance can only be eliminated through subsequent multi-process processing, and finally reach the roundness and straightness IT7 level (national three standards)

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