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A Method for Sensitivity Analysis of Machining Accuracy Reliability of CNC Machine Tool

A technology of sensitivity analysis and machining accuracy, applied in program control, computer control, general control system, etc., can solve problems such as difficulty in obtaining satisfactory results

Active Publication Date: 2017-09-22
BEIJING UNIV OF TECH
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Problems solved by technology

Because the traditional empirical method cannot approach the real geometric error random fluctuation process, it is difficult to obtain satisfactory results, and the Monte Carlo method can truly simulate the actual geometric error random fluctuation process, so it solves the problem of reliability of machine tool machining accuracy and reliability of machining accuracy. Sensitivity issues are very much in line with reality, and very satisfactory results can be obtained

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  • A Method for Sensitivity Analysis of Machining Accuracy Reliability of CNC Machine Tool
  • A Method for Sensitivity Analysis of Machining Accuracy Reliability of CNC Machine Tool
  • A Method for Sensitivity Analysis of Machining Accuracy Reliability of CNC Machine Tool

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Embodiment Construction

[0154] The present invention takes a three-axis precision vertical machining center as an example to verify the above-mentioned numerical control machine tool machining accuracy reliability sensitivity analysis method.

[0155] Specifically include the following steps:

[0156] Step 1 Set up the generalized coordinate system for the three-axis machine tool, and establish the spatial error model of the machine tool.

[0157] Based on the multi-body system kinematics theory, low-order body arrays are used to describe the topology of the abstract machine tool system, a generalized coordinate system is established in the multi-body system, positional relationships are expressed by vectors and their column vectors, and multi-body is represented by a homogeneous coordinate transformation matrix interrelationships between systems;

[0158] Step 1.1 Establish the topology of the three-axis machine tool

[0159] The structure of the machine is as image 3 shown. The machine tool in...

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Abstract

The invention provides a method for analyzing the machining precision reliability sensitivity of a numerically-controlled machine tool, belongs to the field of machine tool precision design, and particularly relates to a space error modeling method of a three-axis machine tool and a method for analyzing the machining precision reliability and the machining precision reliability sensitivity of the machine tool. A multi-body system motion feature analysis method is used for setting up a space error model of the machine tool, and combined with a Monte-carlo digital analogy method for analyzing the machining precision reliability of the machine tool, and the degree of influence on the machining precision reliability from the wave action of all items of geometric errors of the machine tool, so that the critical geometric errors influencing the machining precision reliability are identified. Guiding advice can be given for designing, assembling and machining of the machine tool, and the machining precision reliability of the machine tool is improved fundamentally.

Description

technical field [0001] The invention relates to a method for analyzing reliability sensitivity of numerical control machine tool machining accuracy, which belongs to the field of machine tool precision design. technical background [0002] The machinery manufacturing industry, as the production of mechanical equipment, provides technical equipment for the entire national economy. Its development level is one of the main symbols of the country's industrialization level. With the rapid development of modern science and technology, precision ultra-precision processing technology has become a modern machinery manufacturing industry. major trends in development. CNC machine tool is a high-precision, high-efficiency, high-tech modern electromechanical equipment. As the basis and core equipment of advanced manufacturing technology, it is more and more widely used in mechanical production, and restricts the development of manufacturing fields and various high-tech develop. With th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/406
CPCG05B19/406G05B2219/37001
Inventor 程强赵宏伟冯秋男李凯祁卓刘志峰
Owner BEIJING UNIV OF TECH
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