Compensation method of grinder rigidity based on negative flexibility principle
A compensation method and negative flexibility technology, which is applied in the direction of grinding machine parts, grinding/polishing equipment, workpiece feed movement control, etc., can solve elastic deformation, insufficient rigidity of grinding machine, and inability to accurately control grinding consumption, etc. problems, to achieve the effect of improving processing efficiency, improving surface processing quality and processing efficiency, and ensuring grinding depth
Inactive Publication Date: 2013-04-24
BEIJING UNIV OF TECH
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[0005] The purpose of the present invention is to provide a grinding machine stiffness compensation method based on the principle of negative flexibility, which mainly solves the problem that the elastic deformation caused by insufficient rigidity of the grinding machine cannot accurately control the grinding amount to realize the precision grinding of parts
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[0029] The invention relates to a grinding machine stiffness compensation method based on the principle of negative flexibility. Before this method is implemented, it is first necessary to establish a stiffness compensation coordinate system. The definitions of the grinding plane XY plane and normal direction of vertical surface grinder and horizontal surface grinder are as follows: figure 1 and figure 2 Shown in the OXYZ coordinate system. The main elastic deformation errors that affect the quality of the grinding surface are the elastic deformation in the Z direction and the angular deformation around the X and Y axes, so for the present invention, such as image 3 and Figure 4 The negative compliance controllable table is shown to realize the compensation of the grinding machine stiffness. The workbench used ( image 3 ) The overall size is Φ130×145mm 3 , the parameters of the piezoelectric ceramic driver (7) are: maximum thrust 3000N, axial stiffness 200N / μm. The l...
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The invention discloses a compensation method of grinder rigidity based on a negative flexibility principle, belongs to the technical field of accurate grinding and mainly solves the elastic deformation problem caused by shortage of grinder rigidity during grinding. The compensation of the grinding system rigidity is achieved by utilizing a negative flexibility controllable workbench which is provided with a piezoceramic driver and a flexible mechanism. The compensation method of the grinder rigidity based on the negative flexibility principle comprises a, measuring normal rigidity of a grinder on a real grinding surface and rigidity of two corners which rotate along axial directions of two axes which are perpendicular to each other; b, analyzing mechanical characteristics of a grinding system and building a negative flexibility outputting model of a workbench; and c, establishing a corresponding feedback control system and achieving online compensation of the grinder rigidity. The compensation method of the grinder rigidity based on the negative flexibility principle has the advantages of improving grinding technology, improving grinding efficiency, having important application value in guaranteeing material quantity for grinding, smoothness of grinding surfaces and size accuracy of a workpiece and playing an important role in grinding hard and brittle materials such as engineering ceramics.
Description
technical field [0001] The invention belongs to the technical field of precision grinding, and relates to a grinding machine stiffness compensation method based on the principle of negative flexibility, which mainly solves the problem that the elastic deformation caused by insufficient rigidity of the grinding machine cannot accurately control the grinding amount to realize the precision grinding of parts. . Background technique [0002] Grinding is one of the most important precision machining methods, through which very high surface quality of parts can be obtained. However, in the grinding process, the elastic deformation of the machine tool is unavoidable, which makes it difficult to effectively guarantee the machining accuracy and surface quality of the parts. In addition to the grinding of conventional metal materials (such as structural steel, tool steel, mold steel, etc.), the invention is also used for the grinding of hard and brittle materials (such as engineering...
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IPC IPC(8): B24B49/16
Inventor 王民胡建忠昝涛姚子良
Owner BEIJING UNIV OF TECH
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