Parallel main shaft head mechanism based on four-bar mechanisms

Abstract

The invention discloses a parallel main shaft head mechanism based on four-bar mechanisms, and belongs to the technical field of mechanical production. The mechanism comprises a base, three frames and a movement platform, wherein the three frames are fixedly mounted on the base in an equilateral triangle form; a linear guide rail and a four-bar mechanism are arranged on each frame; each four-bar mechanism comprises a first connecting rod, a second connecting rod, a third connecting rod and a slide block; the rods are interconnected through rotating pairs; and the side edges of the movement platform are connected with the first connecting rods through movement pairs. The movement form of two-rotation and one-movement of the movement platform is realized, and the position and the posture of the movement platform can be easily controlled, so super-precise processing of complex curved surfaces is achieved.The parallel main shaft head mechanism has such characteristics as simple and compact structure, high rigidity, high loading capacity, small mass of the movement part, increase of a working space of the movement platform and facilitation of high-speed movement.

Description

technical field [0001] It relates to a parallel spindle head mechanism based on a four-bar mechanism, which is especially suitable for ultra-precision machining of complex curved surfaces with complex surface shapes, many free curved surfaces, and high processing quality and precision requirements for thin-walled parts in aviation and other fields. field of machinery manufacturing. Background technique [0002] The parallel mechanism has multiple closed branch chain substructures, so it has many advantages compared with the traditional mechanism (serial mechanism). From the structural point of view, it can be clearly seen that the kinematics of the parallel mechanism has the characteristics of high stiffness, low inertia, high dynamic performance and high precision. For this reason, many researchers in the academic field and engineering field have conducted a lot of research on parallel mechanisms. The Gough-Stewart platform is the first parallel mechanism and the most fam...

AI Technical Summary

Problems solved by technology

The Sprint Z3 spindle head mechanism of DS-Technologie in Germany is currently a better mechanism in the world, but due to structural reasons, its working space is small, its dynamic stiffness, dynamic strength and stability are poor, and its processing range is restricted.

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