A three-degree-of-freedom parallel spindle head mechanism

Abstract

A three-freedom-degree parallel-connection spindle head mechanism belongs to the technical field of machinery manufacturing and comprises a fixed platform, a movable platform, a first branch, a second branch and a third branch. The first branch, the second branch and the third branch are of the same structures, each branch comprises a first connecting rod, a second connecting rod, a sliding block, a hook joint, a first rotating pair and a second rotating pair, and a three-freedom-degree moving mode of the movable platform can be achieved through synergic movement of the first branch, the second branch and the third branch. The three-freedom-degree parallel-connection mechanism has the characteristics of being simple and compact in structure, high in rigidity, strong in load capacity, light in mass of moving components and capable of achieving high-speed motion easily. Thus, a five-shaft series-parallel machine tool with the three-freedom-degree parallel-connection mechanism can meet the requirements on machining of aviation complex thin-wall parts.

Description

technical field [0001] The invention particularly relates to a three-degree-of-freedom parallel spindle head mechanism, which belongs to the technical field of mechanical manufacturing. Background technique [0002] Since the 1980s, large-scale gantry-type five-axis linkage CNC milling machines have been more and more widely used in the processing of aircraft structural parts. The workbench, beam and spindle parts of the gantry machine tool realize the movement of the X, Y and Z axes, plus the swing fork or universal swing head, realize the two rotary motions of the A / C axis or the A / B axis, forming five Axis linkage CNC machine tools. The advantage of the swing fork type or universal swing head is that the deflection angle of the spindle is relatively large, and the five-sided machining of rectangular parts can be realized. Although the swing head can achieve high rotation speed and acceleration on a single axis, the tool space orientation speed is still relatively low. L...

AI Technical Summary

Problems solved by technology

[0005] However, the existing parallel mechanism spindle head configurations are few, and some configurations have defects such as high assembly precision requirements and small working space, resulting in fewer spindle head configurations with engineering practical value, coupled with intellectual property rights, etc. Restrictions hinder the development of the parallel mechanism spindle head and the five-axis linkage CNC machine tool equipped with the spindle head

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