Method and device for determining circle center of cylinder hole, and fine boring machine tool

Abstract

The invention discloses a method for determining the circle center of a cylinder hole. The method is applied to a fine boring stage of the cylinder hole in a thermal spraying process of the cylinder hole, and comprises the steps of controlling a measuring head of a fine boring machine tool to start from a design center of the fine boring machine tool, and obtaining a first cylinder hole center coordinate of the cylinder hole to be measured through a four-point circle center measuring method; controlling the measuring head to return to the design center, and controlling a main shaft of the measuring head to rotate for N times according to a preset angle; controlling the measuring head to start from the design center after each rotation, and obtaining the (i+1)th cylinder hole center coordinate of the cylinder hole to be measured in the ith rotation through the four-point circle center measuring method, wherein N is greater than or equal to 2 and is an integer, and i is 1, 2,..., N in sequence; and determining the cylinder hole circle center coordinates of the cylinder hole to be measured according to the first cylinder hole center coordinate and the (i+1)th cylinder hole center coordinate. According to the method, the measurement efficiency, the measurement precision and the measurement cost of the cylinder hole circle center can be considered.

Description

technical field [0001] The present application relates to the technical field of mechanical processing, in particular to a method for determining the center of a cylinder bore, a determining device and a fine boring machine tool. Background technique [0002] When implementing the cylinder bore spraying process, that is, when there is no cylinder liner technology, it is necessary to clad a layer of iron-based coating with a thickness of about 0.3 mm in the machined cylinder bore, and then remove about 0.15 mm in the subsequent fine boring of the cylinder bore. mm coating. On the one hand, since the cladding coating and fine boring cylinder bore are not processed in the same process, there is a positioning error between the two; on the other hand, the cylinder bore needs to be heated during cladding, and the cladding itself will also generate heat, while the cylinder Deformation occurs in an environment of 250°C, coupled with the different heat conduction in all directions o...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for determining the center of a cylinder hole, a device for determining it, and a fine-boring machine tool to solve or partially solve the process of fine-boring a cylinder hole in a cylinder-hole spraying process. At present, an external scanning method is used to determine the center of a cylinder hole. Further modification of the fine boring machine, leading to technical problems of increased costs

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