A test device and test method for three-dimensional static stiffness of machine tool end

Abstract

The invention relates to a test device for the three-dimensional static rigidness of a tail end of a machine too. A power device adopts a hydraulic device with high rated load, a transmission device adopts a cylinder-type linear guide-rail pair structure which is high in transmission efficiency and reliable in structure, the structure is simple and compact, the force transmission efficiency is high, the loading process is smooth and stable, and a force transferring device is flexibly connected to the tail end of the machine tool through a spring, so that the additional displacement and the additional load formed by the external interference can be effectively absorbed, and the tail end structure of the machine tool can be effectively protected. A control system of the test device for the three-dimensional static rigidness of the tail end of the machine tool can automatically control the whole process of the loading, measurement and static rigidness calculation, is friendly to the interface and precise in control. The invention relates to a test method for the three-dimensional static rigidness of the tail end of the machine tool, the three-dimensional loading is realized by adopting a single-direction loading mechanism to be matched with the revolving function of the machine tool, the whole test process is controlled by adopting a control system device and the control system, the method is simple in operation, and the measurement precision is high.

Description

technical field [0001] The invention relates to a test device and a test method for the static stiffness of the end of a machine tool, in particular to a test device and a test method for the three-dimensional static stiffness of the end of a precision / safe multi-axis processing system, belonging to the technical field of machine tool performance testing. Background technique [0002] Multi-axis CNC machine tools are increasingly widely used in machinery manufacturing, especially in the field of high-precision machining. A multi-axis CNC machine tool is generally a processing system composed of multiple translational axes, rotary joints, tool-spindles, etc. The static stiffness value at the end of the process system is affected by the stiffness performance of each part of the system, plus It is often difficult to calculate or simulate the influence of the geometric accuracy of the machine tool to obtain accurate results. As an important parameter for characterizing the perf...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a three-dimensional static rigidity measuring device for the end of a machine tool, aiming at the defects and deficiencies of the existing three-dimensional static stiffness measuring device of the end of the multi-axis CNC machine tool, such as complex loading mechanism, small applied load, and the rigid connection of the measuring end is easy to damage the end structure. Static stiffness test device and test method, the loading device is a simple unidirectional loading structure, which can realize three-dimensional loading with the rotation of the machine tool, and the connection between the force applying device and the end of the machine tool is a flexible connection, which can effectively protect the end structure of the machine tool, the transmission device The cylinder pair structure with high transmission efficiency and reliable structure is adopted. The loading structure adopts a hydraulic device with high rated load. The whole test device has a simple and compact structure, which is easy to install and adjust. The test device and test method have the characteristics of precision, safety and versatility.

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