Abrasive belt grinding center suitable for full surface grinding and polishing of blisks

Abstract

An abrasive belt grinding center applicable to grinding and polishing of a whole profile of a blisk is provided, an X-axis feed mechanism, a Y-axis feed mechanism, a Z-axis feed mechanism, a B-axis rotation mechanism and a C-axis rotation mechanism constitute a grinding head feed mechanism, and a housing, a drum, a synchronous driven pulley, a synchronous belt, a synchronous driving pulley, and a grinding head rotation driving motor constitute a grinding head rotation mechanism. In the present application, two grinding heads are utilized to reasonably assign the machining angle and the feeding, and rough machining and fine machining can be both realized by one time of clamping, and the combination of six degrees of freedom in space is achieved by a short drive chain, and further the rigidities of a grinding head mechanism and a workpiece clamping mechanism are ensured. The combination of double grinding heads and a grinding robot can achieve grinding and polishing of the whole profile of the blisk. The contact wheel of the grinding head mechanism and the abrasive belt can go into a small clearance between blades of the blisk, thus can significantly improve the machining efficiency and reduce the management and production costs on the premise of ensuring the machining precision of a complex curved surface and the quality of the profile.

Description

technical field [0001] The invention belongs to the technical field of abrasive belt grinding, and in particular relates to an abrasive belt grinding center suitable for grinding and polishing the entire profile of an integral blisk. Background technique [0002] The blisk is a key component of a new generation of aero-engine. Compared with traditional aero-engine blades, its application is conducive to the improvement of aero-engine performance, simplification of mechanism, reduction of mass, and improvement of reliability and durability. The polishing process, as the last process of blisk processing, directly affects its surface quality and aerodynamic performance. Due to the complex structure of the blisk, its material is also difficult to process, which makes it very difficult to process the blisk. Although there are polishing methods such as electron beam polishing and electrolytic polishing in our country, their degree of automation is not high, and the efficiency of ...

AI Technical Summary

Problems solved by technology

However, due to the characteristics of the overall blisk flow channel and blade surface are free-form surfaces, the passage between the blades is narrow, the blade is thin, easy to deform, and the material is difficult to process, the traditional method of grinding cannot solve the problem of grinding the entire blisk surface. In the grinding and grinding process, the interference between the abrasive tool and the workpiece and the meshing of the grinding surface are difficult. At the same time, the grinding lines on the surface of the overall blisk are mostly horizontal lines. However, if the blade has longitudinal lines on the research surface, its fatigue strength is higher than that of traditional grinding. The leaves will be greatly improved

[0005] The results of the above research have not yet formed a good abrasive belt grinding and polishing device to deal with the grinding and polishing of workpieces with complex surfaces and special-shaped structures represented by the overall blisk of the aero-engine, and there is no special abrasive belt grinding and polishing that can process such workpieces in China. Grinding machines, the needs for full-surface grinding, grinding interference elimination, and longitudinal grinding of the overall blisk of the aero-engine to improve its fatigue strength and other mechanical properties cannot be met.

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