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Two-translation-and-three-turning parallel mechanism used for virtual machine tool

A virtual machine tool and three-rotation technology, which is applied to metal processing machinery parts, large fixed members, metal processing equipment, etc., can solve problems such as difficulties in motion correction, small working space, and complex mechanism, and achieves easy kinematics correction and large working space. Big, flexible effects

Inactive Publication Date: 2014-12-24
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many key technologies of this type of mechanism have not yet been solved, such as: the movement is difficult to solve; the pose of the motion platform is strongly coupled with the input, which is not conducive to control; the mechanism is complex, resulting in a small working space

Method used

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  • Two-translation-and-three-turning parallel mechanism used for virtual machine tool

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Embodiment Construction

[0014] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0015] Such as figure 1 As shown, the present invention is a two-translation three-rotation parallel mechanism for a virtual machine tool, which consists of a dynamic platform 9, a static platform 10 and four branch chains I, II, III, and IV with different structures; the first branch chain I By spherical vice S 1 , rod 1, moving pair P 1 , member 2 and Hooke hinge U 1 connected sequentially; the second branch chain II consists of spherical pair S 2 , rod 3, moving pair P 2 , member 4 and Hooke hinge U 2 connected sequentially; the third branch III consists of spherical pair S 3 , rod 5, moving pair P 3 , rod 6 and Hooke hinge U 3 connected sequentially; the fourth branch chain IV consists of spherical pair S 4 , rod 7, moving pair P...

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Abstract

The invention provides a two-translation-and-three-turning parallel mechanism used for virtual machine tools. The parallel mechanism is composed of a motion platform, a fixed platform and four branch chains, a hooke joint, a sliding pair and a spherical pair are in serial connection to form a first branch chain, and a second branch chain and a third branch chain have a same structure with the first branch chain. A revolute pair, a sliding pair and a spherical pair are in serial connection to form a fourth branch chain. Configuration method of the four branch chains between two platforms is that two-translation-and-three-turning output of the motion platform can be controlled by driving the sliding pairs in the four branch chains and the revolute pair in the fourth branch chain. The two-translation-and-three-turning parallel mechanism regards unexpected movement output as a constant, partial control decoupling can be achieved through movement output-input, kinematics positive solution is easier, and therefore, the two-translation-and-three-turning parallel mechanism has the advantages of simple structure and fine rigidity and the like and can serve as a reconfigurable executing mechanism of the virtual machine tools and robots.

Description

technical field [0001] The invention relates to a reconfigurable executive mechanism of a virtual machine tool, in particular, a two-translation and three-rotation parallel mechanism for a virtual machine tool. Background technique [0002] The parallel mechanism CNC machine tool refers to the machine tool with the parallel mechanism as the executive mechanism. This machine tool is considered to be a revolution in the structure of machine tools since the 20th century. At present, prototypes of this machine tool (such as the Variax parallel machine tool of Giddings and Lewis Company of the United States) have been developed in the United States, Japan and other countries, and the parallel mechanisms adopted are all traditional Stewart (Stewart) mechanisms. This mechanism for controlling the position and attitude of the tool in space is mainly composed of a base, a moving platform and a connecting rod. The base and the moving platform are connected by a connecting rod, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q1/48
CPCB23Q1/44
Inventor 冯志友
Owner TIANJIN POLYTECHNIC UNIV
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