Guide rail and sliding block mechanism of sliding block type hydrostatic guide rail

Abstract

The invention discloses a guide rail and sliding block mechanism of a sliding block type hydrostatic guide rail, and relates to parts of the sliding block type hydrostatic guide rail. The guide rail and sliding block mechanism comprises a guide rail with bearing faces at different angles. The horizontal angle of the upper bearing face of the guide rail is 20 degrees. The angle of the lower bearing face of the guide rail is 40 degrees. The guide rail and sliding block mechanism further comprises a sliding block with different oil cavity areas. The inner shape of the sliding block is a U-shaped groove with a downward opening. The upper portion of the groove wall and the lower portion of the groove wall are respectively provided with two bearing faces. A large pressure oil cavity is formed in each upper bearing face. A small pressure oil cavity is formed in each lower bearing face. The bearing capacity of the hydrostatic guide rail is effectively improved. The horizontal angles of the bearing faces of the sliding block are consistent with the horizontal angles of the bearing faces of the guide rail. The sliding block and the bearing faces of the guide rail are matched, and a certain gap is reserved between the sliding block and the bearing faces of the guide rail. Four oil inlet holes are formed in the sliding block, pressure oil can enter the oil cavities through the oil inlet holes, a pressure oil film is formed between the sliding block and the guide rail, and the hydrostatic effect is generated. Oil returning grooves are formed in the peripheries of the pressure oil cavities and communicated with an oil sucking pump to guarantee that the returned oil in the pressure oil cavities is in the negative pressure, and the hydrostatic stability is effectively improved.

Description

technical field [0001] The invention relates to a standard component used in conjunction with a high-precision or heavy-duty machine tool, in particular to a slide block type static pressure guide rail. Background technique [0002] In medium and large-scale and high-precision machine tools, the roller linear guideway (slider type) developed in the past ten years is widely used, and this kind of guideway has formed standardized, serialized and generalized products. However, this kind of guide rail has inherent defects. Because it is rolling to transmit linear motion, the vibration absorption is poor, and there is a difference between static friction resistance and dynamic friction resistance, which affects the motion accuracy of the machine tool to a certain extent, especially when the cutting force changes greatly. , The machine tool with frequent speed changes will affect the machining accuracy of the machine tool. Therefore, many machine tool manufacturers are designing ...

AI Technical Summary

Problems solved by technology

However, this kind of guide rail has inherent defects. Because it is rolling to transmit linear motion, the vibration absorption is poor, and there is a difference between static friction resistance and dynamic friction resistance, which affects the motion accuracy of the machine tool to a certain extent, especially when the cutting force changes greatly. , the machine tool with frequent speed changes will affect the machining accuracy of the machine tool

Therefore, many machine tool manufacturers are designing and manufacturing static pressure guide rails by themselves, but the structures are varied, and it is impossible to form standardized, serialized, and generalized standard parts, which seriously hinders the promotion and improvement of static pressure technology. Designed the slider type closed hydrostatic guide rail slider, which created conditions for the standardization and serialization of hydrostatic guide rails

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