Assembling stress testing platform for structural member of heavy type machine tool

Abstract

The invention discloses an assembling stress testing platform for a structural member of a heavy type machine tool. The testing platform is characterized by comprising a pedestal, horizontal guide rails, slide blocks, rear supports, horizontal hydraulic cylinders, columns, a balancing connection plate, vertical hydraulic cylinders and a movable crossbeam. The testing platform can test influence on assembling stress and precision when two drivers of the heavy type machine tool are asynchronous, influence of deadweight of the movable crossbeam of the heavy time machine tool on the assembling stress, and influence of parallelism and flatness errors of the guide rails on the assembling stress and precision; and testing results can provide bases for optimizing assembling of the guide rails, optimizing pretightening forces of the slide blocks and optimizing the parallelism of the guide rails of the heavy type machine tool.

Description

technical field [0001] The invention relates to the technical field of assembling stress simulation of heavy-duty machine tool structural parts, in particular to a testing platform for assembling stress of heavy-duty machine tool structural parts. Background technique [0002] The machine tool manufacturing industry is the heart of the machinery manufacturing industry, and its performance level has become an important symbol to measure the level of a country's machinery manufacturing industry. Heavy-duty CNC gantry machine tools are different from ordinary CNC machine tools due to their large size, heavy weight, and asynchronous dual drives. Due to the characteristics of the machine itself, the assembly process is also subject to the gravity deformation of the large components, the processing error, especially the influence of the straightness, parallelism and flatness of the guide rail, and the skill level of the assembly personnel, which restrict the assembly accuracy. The...

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Problems solved by technology

Guo Cheng, Wang Weiyou and others from Nanjing University of Science and Technology studied the influence of the surface pressure on the sliding guide rail, the sliding speed of the slider, the lubricating medium and the plastic on the dynamic stiffness and damping of the guide rail, and simulated the change of the weight of the machine tool beam on the joint surface. The impact of dynamic stiffness, but did not simulate the impact of the non-parallelism between the guide rails and the asynchronous dual drive of the machine tool, which caused the dynamic stiffness and the overall assembly accuracy

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