Mechanical processing method for dry cylinder liners

Abstract

The invention discloses a mechanical processing method for dry cylinder liners. The method comprises the steps: shot blasting before a rough boring process to remove a coating layer and sundries from an external surface, so as to enable the external surface of a cylinder liner blank to be smooth and clean; during rough boring, locating by using a belt of a cylinder liner and the excircle blank surface of a water jacket part, so as to enable a three-point self-centering clamp to locate and clamp the blank excircle of the cylinder liner, and difference in the inner hole wall of the cylinder liner to be controlled within 0.5 mm. The method is adopted to process the dry cylinder liner, the blank weight of the cylinder liner can be reduced by more than 15%, three machining processes are eliminated on the basis of the original process, quality of the shoulder, the excircle and the inner hole of the cylinder liner can be effectively controlled, the passing rate of finished products of cylinder liners is improved to more than 90% from less than 85%, and the manufacturing cost of dry cylinder liners is reduced.

Description

technical field [0001] The invention relates to a processing method for a cylinder liner, in particular to a machining method for a dry type cylinder liner. Background technique [0002] The traditional dry cylinder liner processing method has the following disadvantages: 1. The rough reaming process uses the big end face of the blank to position on the V-shaped ring. The positioning surface is covered with rough and uneven paint, so the positioning is not accurate. After rough boring, the wall thickness difference of the inner hole of the cylinder liner reaches 1.5mm , in order to prevent waste products caused by casting defects, the physical size of the inner hole and outer circle of the blank is designed to be larger, there are more machining processes, and the demand for production line equipment and personnel is large, resulting in higher cost of the cylinder liner; 2. Dry cylinder liner The wall thickness is relatively thin, generally around 2mm, and the hydraulic rubb...

AI Technical Summary

Problems solved by technology

[0002] The traditional dry cylinder liner processing method has the following disadvantages: 1. The rough reaming process uses the big end face of the blank to position on the V-shaped ring. The positioning surface is covered with rough and uneven paint, so the positioning is not accurate. After rough boring, the wall thickness difference of the inner hole of the cylinder liner reaches 1.5mm , in order to prevent waste products caused by casting defects, the physical size of the inner hole and outer circle of the blank is designed to be larger, there are more machining processes, and the demand for production line equipment and personnel is large, resulting in higher cost of the cylinder liner; 2. Dry cylinder liner The wall thickness is relatively thin, generally around 2mm, and hydraulic rubber outsourcing fixtures have been used for fine honing, so the cylindricity and straightness of the inner circle have large errors, and the qualified rate of finished cylinder liners is low