A static stiffness detection device for a CNC machine tool

Abstract

The invention discloses a static stiffness detection device for a CNC machine tool, which includes three independent systems of a detection part, an execution part and a loading part, wherein the loading part is a hydraulic system; the main body of the execution part is a base, and the There are three through holes in the vertical direction on the base; at the two ends of the X direction are respectively a perforated end cover and a collar I, and a transverse piston, a force Sensor I, probe I, the outermost is the pressure plate I, the force sensor I is installed on the outer rod of the transverse piston, and is fixed by the cone core I; the two ends in the Z direction are the non-porous end cap and the sleeve Ring II. The present invention integrates three hydraulic cylinders in the vertical direction by an integrated method, which greatly reduces the overall size and self-weight of the device, and completes the entire design of the three free loading units through self-designed innovation, making up for previous related research The shortcomings of the results are high reliability and convenient application.

Description

technical field [0001] The patent of the present invention relates to a performance detection device in the field of numerical control machine tools, in particular to a static stiffness detection device of a complete numerical control machine tool. Background technique [0002] The static stiffness of the CNC machine tool refers to its ability to resist deformation when it bears a constant load in three vertical directions in space. It is an important indicator of machine tool design. The static performance of the machine tool will affect its dynamic characteristics. The static deformation of the machine tool under the action of the machine tool will not only change the geometric accuracy of the parts and reduce the processing quality, but also affect the vibration resistance, productivity, noise, working life, motion balance, heat generation and wear of the machine tool. , in order to accurately and reliably design the spindle and other parts of the CNC machine tool, it is ...

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Problems solved by technology

[0003] The development of the static stiffness test system for CNC machine tools involves the design of three-dimensional cutting force simulation loading devices, loading force testing, machine tool deformation testing, data post-processing and drawing stiffness curves and other basic theory and experimental technology research work. Some scholars have conducted relevant research, and there are also many research results and literature publications on the static stiffness test methods of ordinary machine tools and CNC machine tools. However, in these results, most of the test methods developed for the static stiffness of CNC machine tools can only measure Simultaneous measurement in a certain direction instead of the three vertical directions of X, Y, and Z is not only difficult to change the measurement direction, but also does not conform to the actual situation of workpiece processing, and has obvious limitations. Although other research results can measure the static stiffness in three directions at the same time , but most of its test systems are temporarily assembled, far from integrated, and the research of a large number of scholars only stays in the conception or experiment of the scheme

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