Heat error measuring system of whole workbench of numerical control machine tool and measuring method of system

Abstract

The invention relates to a heat error measuring system of the whole workbench of a numerical control machine tool and a measuring method of the system. A positioning plate adsorbed by the surface of the workbench of the numerical control machine tool, the positioning plate is provided with multiple cuboid standard members uniformly, an I / O port of a PMC module of a numerical control system of the machine tool is connected with a signal converter, the signal converter is in bidirectional communication with a computer, a measuring head is mounted in a cutter position of the numerical control machine tool, and the cuboid standard members, the measuring head, the numerical control machine tool, the signal converter and the computer form the heat error measuring system. According to the invention, multi-point heat error measurement of the workbench of the numerical control machine tool can be realized via only one measuring head and multiple cuboid standard members, and the cost is low; and the signal converter is used to realize communication between the numerical control machine tool and the computer, data is measured and stored automatically, the required labor force of measurement is reduced substantially, and manual errors caused by manual measurement and manual data recording are avoided.

Description

technical field [0001] The invention relates to the technical field of thermal error measurement of machine tools, in particular to a thermal error measurement system and a measurement method for the entire workbench of a numerically controlled machine tool. Background technique [0002] CNC machine tools are a milestone in modern industry. During processing, there is no need to manually control the tool, and the degree of automation is high, which greatly improves the processing efficiency and the stability of product quality, and at the same time reduces the labor intensity and skill level of the operators. deep influence. Due to the complex structure of the CNC machine tool and many heat sources during operation, the temperature field in the space is a non-uniform temperature field and changes with time. The parts of the CNC machine tool are heated unevenly, resulting in thermal deformation, which can easily cause the top of the tool and the surface of the workpiece to be...

AI Technical Summary

Problems solved by technology

At the same time, the workbench itself is affected by the thermal deformation of the body, and the thermal deformation of each point on the workbench is not the same. These factors will lead to differences in the thermal errors of different positions on the workbench.

At present, there are few researches on the overall thermal error of CNC machine tool workbench at home and abroad, and there are very few related papers.

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