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A workpiece positioning method and system

A positioning method and workpiece technology, applied in positioning devices, metal processing mechanical parts, manufacturing tools, etc., can solve problems such as time-consuming, and achieve the effects of reducing equipment costs, facilitating automation of machining processes, and realizing automation of machining processes.

Active Publication Date: 2020-11-06
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] (3) Manually adjusting the position of the positioning pin of the fixture is often time-consuming and depends on the experience and skills of the operator

Method used

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  • A workpiece positioning method and system
  • A workpiece positioning method and system
  • A workpiece positioning method and system

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Embodiment Construction

[0074] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0075] The application of the present invention will be further described below in conjunction with specific analysis.

[0076] The workpiece positioning system provided by the embodiment of the present invention includes: a numerically controlled machine tool; a fixture installed on the machine tool workbench, the fixture is equipped with positioning pins in contact with the workpiece reference surface, and part or all of the positioning pins can be adjusted freely; measuring the spatial pose of the workpiece a measuring system; and a calculation unit for calculating the adjustment of the movable positioning pin.

[0077]...

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Abstract

The invention belongs to the technical field of workpiece positioning, and discloses a workpiece positioning method and system. The workpiece positioning system comprises a numerical control machine tool, a clamp installed on a workbench of the numerical control machine tool, a measurement system for measuring the space pose of a workpiece, and a calculation unit used for calculating the adjustment amount of movable positioning pins, wherein the positioning pins which are in contact with a reference surface of the workpiece are arranged in the clamp, and a part or all of the positioning pins can be movably adjusted. According to the workpiece positioning method and system, the applicability is high, the system and method are suitable for a numerical control machine tool which is lack of enough movement freedom degree and does not have a clamping error dynamic compensation function, positioning error compensation for six degrees of freedom of the workpiece is achieved by adjusting the positions of the movable positioning pins on the clamp, the positioning precision is high, high-precision pose fine adjustment of the workpiece in a small range can be easily achieved, the cost is low,and a numerical control machine tool which is high in cost and has six-degree-of-freedom and clamping error dynamic compensation functions is not needed, so that the equipment cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of workpiece positioning, and in particular relates to a workpiece positioning method and system. Background technique [0002] The positioning accuracy of the workpiece is very important in the machining and manufacturing process. The positioning and clamping of the workpiece on the machine tool usually needs to be completed by a fixture, that is, first install the fixture on the workbench of the machine tool, and then install the workpiece on the fixture. In order to ensure the posture (position and attitude) of the workpiece relative to the machine tool, the fixture is often equipped with six positioning pins that are in contact with the workpiece datum surface. In traditional processing and manufacturing, fixtures and positioning pins need to meet high manufacturing and assembly accuracy to ensure workpiece positioning accuracy, which not only increases the cost of fixtures, but also may bring difficult...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q3/06B23Q17/00
CPCB23Q3/06B23Q17/00
Inventor 李育文文鑫刘颖
Owner SHANGHAI UNIV
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