Fine boring fixture in cylinder jacket machining

Abstract

The invention discloses a fine boring fixture in cylinder jacket machining, and relates to the field of machining, in particular to the fine boring fixture in cylinder jacket machining. The fine boring fixture comprises a fixture body; an inner cavity of the fixture body is a three-step-shaped; the middle inner cavity is an oil cylinder; a hollow piston is mounted in the oil cylinder; the upper part of an inner hole of the piston is a conical surface; a middle sealing groove is formed in the outer circular surface of the piston; an upper outer circle of the piston is matched with the lower part of the upper cavity wall of the fixture body; an upper sealing groove is formed in the upper outer circle of the piston; the lower part of the inner cavity of the fixture body is connected with a cylinder cover through a bolt; a lower outer circle of the piston is matched with an inner circle of the cylinder cover; a lower sealing groove is formed in the outer circular surface of the lower part of the piston; sealing rings are arranged in the sealing grooves; and an expansion sleeve with upper and lower surfaces as conical surfaces is additionally mounted in the upper cavity of the fixture body. The fine boring fixture is convenient to operate and stable in operation, improves the roundness and the coaxiality of the inner hole of a cylinder jacket, shortens the assistance time, and relives the labor intensity of workers.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a fine boring fixture for machining a cylinder liner. Background technique [0002] Engine cylinder liner machining is divided into rough boring, rough turning, total length cutting, semi-finish hinge, semi-finish turning, fine boring, finish turning shoulder, grooving, finish turning outer circle, honing and other processes. The inner circle of the inner circle is used as the benchmark of the subsequent finishing outer circle process, which requires high shape accuracy and position accuracy, so the fine boring process is the key connecting process. The process requires that the roundness error of the inner circle of fine boring is below O.03, and the coaxiality error between the inner circle and the upper and lower belts is less than o. 1 or less, so as to ensure the size and shape accuracy of the next outer circle finishing process. At the same time, because the honing al...

AI Technical Summary

Problems solved by technology

This tooling has the following defects: 1. Workers need to use a wrench to tighten the screws every time the cylinder liner is clamped, which increases the auxiliary time and labor intensity of the workers; Clearance, when the boring tool is cutting, the inner wall of the side where the belt of the cylinder liner is close to the insert ring is more boring than the inner wall of the side with the gap. In addition, when the boring tool is processing the inner hole of the cylinder liner, the cutting force will also make the cylinder The inner wall of the sleeve is deformed to a certain extent, which causes the roundness of the fine boring inner circle of the cylinder liner to be out of tolerance. degree of tolerance

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