Novel linear rolling and sliding composite guide rail pair

Abstract

The invention discloses a novel linear rolling and sliding composite guide rail pair, comprising a guide rail and a sliding block fit with each other, wherein the guide rail is trapeziform, two side faces of the trapeziform guide rail are guiding faces, the upper surface of the trapeziform guide rail is a bearing surface, the bottom of the sliding block is provided with a trapeziform groove fit with the trapeziform guide rail, the two side faces of the trapeziform groove are respectively provided with at least one row of cylindrical rollers along the length direction, a guide rail soft strip is arranged between the upper surface of the trapeziform groove of the sliding block and the bearing surface of the trapeziform guide rail along the length direction of the guide rail. The novel linear rolling and sliding composite guide rail pair integrates the advantages of a rolling guide rail and a sliding guide rail, ensures the guiding and positioning accuracies of the motion guide rail and the bearing capacity of the guide rail and simultaneously reduces motion resistance reasonably in the case of loading heavily and cutting heavily, promotes sensitivity, rigidity and vibration resistance of the motion guide rail, improves machining efficiency and prolongs the service life of the guide rail.

Description

technical field [0001] The invention relates to the technical field of guide rail pairs, in particular to a novel linear rolling-sliding composite guide rail pair. Background technique [0002] With the rapid development of China's economy, large-scale projects such as high-speed railways, wind power equipment, domestic large aircraft projects, aerospace equipment, automobile manufacturing equipment and engineering machinery manufacturing have performance requirements for heavy-duty CNC machine tools that can achieve heavy-duty, high-speed and high-torque cutting increasing day by day. [0003] Guide rail is one of the core components of heavy-duty CNC machine tools, which largely determines the rigidity, accuracy and precision retention of heavy-duty CNC machine tools. [0004] The executive components (spindle box, tool holder, workbench) of heavy-duty CNC machine tools are heavy, which puts forward higher requirements for the bearing capacity of the guide rail and the mo...

AI Technical Summary

Problems solved by technology

[0006] The rolling guide rail is made of rolling elements placed between the guide part and the moving part, and can make the matching two guide rail surfaces not directly contact, so it has small frictional resistance, good follow-up and high-speed motion performance, positioning accuracy and repeatability It has the advantages of high positioning accuracy, but its contact stress is large under heavy load, and its vibration resistance and rigidity are poor.

[0007] The sliding guide rail has a large contact area, and most of them use inlaid guide rails or plastic-coated guide rails, which have large bearing capacity, good vibration resistance and rigidity, but their dynamic and static friction is relatively large, and their motion sensitivity is low. They are easy to "crawl" and wear at low speeds. , the disadvantage of short service life

[0008] The hydrostatic guideway adopts liquid friction, and the oil film has good vibration resistance, but its structure is complicated, the cost is high, and maintenance is difficult, so it has not been widely used.

[0009] The above types of guide rails have their own advantages and disadvantages. If rolling guide rails or sliding guide rails are used alone, it is difficult to meet the ideal performance indicators and accuracy requirements of heavy-duty machine tools.

Images