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A Method for Obtaining Optimal Mounting Position of Workpiece Based on Contour Error

A technology of contour error and installation position, which is applied in the field of obtaining the optimal installation position of workpieces, can solve problems such as processing errors, and achieve the effects of providing processing accuracy, small processing contour errors, and reducing processing errors

Active Publication Date: 2020-11-24
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] At present, there is a lack of research on the machining error caused by the selection of the workpiece installation position in robot milling. Therefore, it is urgent to provide a method to solve the problem of machining error caused by the workpiece installation position

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  • A Method for Obtaining Optimal Mounting Position of Workpiece Based on Contour Error
  • A Method for Obtaining Optimal Mounting Position of Workpiece Based on Contour Error
  • A Method for Obtaining Optimal Mounting Position of Workpiece Based on Contour Error

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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0041] Such as figure 2 As shown, the equipment used in the present invention includes: robot body 1, tooling table 2, workpiece 3, milling cutter 4, electric spindle 5, cutting force simulation software, Matlab calculation program, robot control program, electric spindle 5 passes through the bolt Installed on the end of the robot body 1, the milling cutter 4 is connected to the electric spind...

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Abstract

The invention belongs to the field of robot milling, and discloses a method for acquiring an optimal installation position of a workpiece based on contour errors. The method comprises the following steps of: (a) in a robot milling process, planning the machining track, feeding speed and main shaft rotating speed of a to-be-machined workpiece, and calculating the cutting force corresponding to eachcutter location point on the machining track in a base coordinate system of the robot; (b) calculating the contour error of each cutter location point and an average value of the contour errors of all the cutter location points; (c) building an optimization model enabling the average contour error to be minimum, calculating the optimal installation position of the workpiece according to the optimization model, thus acquiring the optimal installation position of the workpiece. By means of the method, the optimal installation position with the minimum contour error in the robot milling processcan be obtained, and the machining precision is improved.

Description

technical field [0001] The invention belongs to the field of robot milling, and more specifically relates to a method for obtaining an optimal installation position of a workpiece based on a contour error. Background technique [0002] In the field of robot milling, the most important factor affecting the quality of the workpiece is the machining error caused by the end deformation caused by the low rigidity of the robot and the milling force, without considering the error of the robots motion accuracy. For six-degree-of-freedom serial industrial robots, the problem of low stiffness is a common problem, and its stiffness distribution is heavily dependent on the pose of the robot. However, for milling that requires high precision, under the given conditions of low rigidity of the robot, how to select the best installation position for milling is of great significance for improving the machining accuracy. And the actual robot milling process should consider the influence of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/19G05B19/408G05B19/4099
CPCG05B19/19G05B19/4086G05B19/4099G05B2219/45136
Inventor 杨吉祥叶葱葱丁汉林俊哲
Owner HUAZHONG UNIV OF SCI & TECH
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