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Reconstructable hybrid machine tool of mechanical system and fault tolerance correcting method

A technology of mechanical systems and machine tools, used in metal processing machinery parts, large fixed members, metal processing, etc., to solve problems such as quality accidents, quality or safety accidents, and major failures

Inactive Publication Date: 2009-06-03
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the hybrid machine tool overcomes the defects of the traditional parallel machine tool, since the four legs in the parallel closed-chain mechanism of the machine tool only have one set of driving devices, when When any driving device fails, it will cause the parallel closed-chain mechanism to run unbalanced, causing quality accidents in the slightest, and damage to the machine tool in the worst case; Both are driven by screw nuts, and when any leg fails, it cannot be converted into a driven leg, thus restricting the reconstruction of the parallel closed-chain mechanism
Therefore, the above-mentioned hybrid machine tool has a high probability of failure, and once the parallel closed-chain mechanism fails, if the machine tool continues to run, it will lead to quality or safety accidents

Method used

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  • Reconstructable hybrid machine tool of mechanical system and fault tolerance correcting method
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  • Reconstructable hybrid machine tool of mechanical system and fault tolerance correcting method

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Embodiment Construction

[0022] In this embodiment: there are four sets of redundant transmission devices 4, which are respectively fixed on the central leg 2 and three peripheral legs 3, and pass through the power output gear 4-6, the central leg mandrel 2-5 and the peripheral leg mandrel The gear rack 2-6 on the 3-4 meshes, the modulus (m) is 3, the number of teeth (z) of the gear 4-6 is 15; in the transmission system of the redundant transmission device 4, the power (P) of the servo motor 4-1 is 80W 1. The reduction ratio of the gear reduction mechanism 4-2 is 8, the clutch 4-3, and the brake 4-4 are all the same as the background technology. 5, and through the clutch 4-3 and the main shaft clutch connection, to transmit power, the model of the photoelectric encoder 4-7 is CN65M121759; the outer diameters of the center leg housing 2-4 and the mandrel 2-5 are respectively φ65mm, φ30mm, the outer diameters of the surrounding leg shells 3-3 and their mandrels 3-4 are φ45mm and φ20mm respectively; in t...

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Abstract

The invention belongs to a numerical control processing machine tool, comprising a fixed platform, a movable platform, a space parallel connection closed chain mechanism formed by the central leg and the surrounding leg of a redundancy drive device which are arranged between the two platforms and are all provided with a transmission system, a locking device arranged between the hinged saddle of the central leg and the movable platform, a gear rack transmission mechanism arranged between the redundancy drive device and the central leg and between the redundancy drive device and the surrounding leg, a working platform which can move along X direction and Y direction, and a control system. The reconstruction and fault tolerance correcting method in the operation of the machine tool is as follows: when one transmission system in any drive device goes wrong, a redundancy transmission system automatically converts; when two transmission systems in any drive device go wrong, a corresponding leg thereof is converted into a driven leg, thus leading the parallel connection closed chain mechanism to be changed from four freedom degrees into three freedom degrees so as to maintain the normal operation of the machine tool, thereby being capable of effectively improving the efficiency, safety and reliability of the hybrid machine tool, and avoiding the quality or safety accidents caused by sudden failures in the operation of the machine tool.

Description

technical field [0001] The invention belongs to a numerically controlled machine tool for mechanical processing in the technical field of mechanical manufacturing, in particular to a hybrid machine tool with a reconfigurable mechanical system and a reconfigurable, fault-tolerant and automatic error-correcting method for ensuring its safety and reliability. Background technique [0002] In recent years, scholars at home and abroad have done a lot of research work in the field of parallel machine tools. But most of the prototypes of parallel machine tools are based on Stewart (Stewart) platform and its deformation structure. The most important features of this type of parallel machine tool are high machining accuracy, structural shock resistance and good cutting stability. precision compensation. The hybrid CNC machine tools that are used in parallel and series at the same time are more practical. The hybrid CNC machine tool can combine the advantages of the parallel mechan...

Claims

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Application Information

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IPC IPC(8): B23Q41/04B23Q1/03B23Q1/25B23Q5/00
Inventor 范守文李登静张小丽姬鹏升邵旭光
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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