Spherical surface hole boring and milling mechanism

Abstract

The invention discloses a sphere inner hole milling and boring mechanism, which comprises a main shaft, a main shaft connecting sleeve is nested at the outside of the main shaft, a tool post disc is arranged at the front end of the main shaft, a tool post is connected in the tool post disc rotationally, a linkage mechanism is connected at the tail end of the tool post rotationally, and the other end of the linkage mechanism is fixedly connected with a circular sleeve, the rear end of the circular sleeve is connected with a feeding mechanism, the circular sleeve is nested on the main shaft connecting sleeve axially and glidingly, and rotates with the main shaft connecting sleeve by linkage. The sphere inner hole milling and boring mechanism can be arranged on rams and main shafts of common floor-type milling and boring machines and gantry type milling machines, and has relative low tool path error and spherical contour error when in uni-axial and co-diametric tool feeding; and the invention takes the rotation of the sphere main shaft as the main motion, and the feeding mechanism realizes the auxiliary motion, the combination of the motions improves the boring efficiency, the spherical surface precision is up to standard, the machine tool utilization rate is increased, the production loads of high-precision machine tools are released, and the input costs of equipment are greatly saved.

Description

technical field [0001] The invention relates to a machining device, in particular to a spherical inner hole boring and milling mechanism mounted on a milling machine. Background technique [0002] In the prior art, special-purpose machine tools are used for the boring and milling of the spherical inner hole. Because the spherical surface processing requires high precision, accurate tool movement and control of the cutting amount, it is difficult for ordinary machine tools to do this, and at the same time requires the operator to have a good However, the use of special machine tools for processing requires large investment and high product costs, which is not conducive to the development of enterprises. There is also a kind of machining by CNC machine tools. For example, in the process of machining 300MW generator sets, the inner spherical bearing bush hole of the motor end and valve adjustment end spindle bearing on the model H165 low-pressure outer cylinder, the diameter of...

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Problems solved by technology

[0002] In the prior art, special-purpose machine tools are used for the boring and milling of the spherical inner hole. Because the spherical surface processing requires high precision, accurate tool movement and control of the cutting amount, it is difficult for ordinary machine tools to do this, and at the same time requires the operator to have a good advanced operating technology and experience, but the use of special machine tools for processing requires large investment and increased product costs, which is not conducive to the development of enterprises

There is also a kind of machining by CNC machine tools. For example, in the process of machining 300MW generator sets, the inner spherical bearing bush hole of the motor end and valve adjustment end spindle bearing on the model H165 low-pressure outer cylinder, the diameter of the spherical surface is φ985mm, and the roughness is 0.8um. At present, the FA-C221 3-axis linkage CNC boring and milling machine manufactured by Italy INNSA company is used for processing. Although the CNC machine tool is used, the tool trajectory error of the multi-axis CNC servo motor composite forming will cause spherical contour errors, resulting in product processing efficiency and reduced quality

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