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Five-axis curved surface machining path planning method based on differential vector optimization

A technology of processing trajectory and vector, applied in the direction of comprehensive factory control, program control, instrument, etc., can solve the problems of reducing the processing quality of the workpiece, the movement is not smooth enough, and the selection of the tool axis vector angle is not appropriate, so as to improve the processing quality and avoid accumulation Effect of error, feed motion smoothing

Active Publication Date: 2021-09-03
HEFEI UNIV OF TECH
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Problems solved by technology

[0005] Based on this, it is necessary to solve the technical problem that the motion of each motion axis is not smooth enough in the processing process of the existing five-axis machine tool, and the selection of the tool axis vector angle is not appropriate, thereby reducing the processing quality of the workpiece. Trajectory planning method for five-axis surface machining based on differential vector optimization

Method used

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  • Five-axis curved surface machining path planning method based on differential vector optimization
  • Five-axis curved surface machining path planning method based on differential vector optimization
  • Five-axis curved surface machining path planning method based on differential vector optimization

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Embodiment 1

[0062] This embodiment provides a five-axis curved surface machining trajectory planning method based on differential vector optimization, which is used to optimize the machining trajectory of a five-axis machine tool. The tool of the five-axis machine tool processes a workpiece to be processed according to the optimized processing trajectory.

[0063] see figure 1 , The processing trajectory planning method provided in this embodiment includes the following steps, that is, includes steps S1 to S6.

[0064] S1. Obtain the tool nose point trajectory before optimization in a workpiece coordinate system, and start from the initial point in the tool nose point trajectory, and sequentially obtain the tool attitude vectors at each current tool nose point. In this embodiment, the tool nose point trajectory E before optimization i The expression formula is:

[0065] E. i ={x i ,y i ,z i}

[0066] where x i It is the horizontal coordinate of the current tool nose point. the y...

Embodiment 2

[0158] This embodiment provides a computer, which includes a memory, a processor, and a computer program stored in the memory and operable on the processor. The computer program running on the processor is used to implement the differential vector optimization based on the differential vector optimization in Embodiment 1. Path planning method for five-axis surface machining.

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Abstract

The invention belongs to the technical field of numerical control machining, and particularly relates to a five-axis curved surface machining track planning method based on differential vector optimization, and the method comprises the steps: obtaining a tool nose point track before optimization, and sequentially obtaining a tool posture vector at each current tool nose point from an initial point in the tool nose point track; acquiring initial coordinates of the five motion axes, and calculating the jacobian matrix of the five-axis machine tool corresponding to the current tool nose point; creating a normalized optimization target model, determining a tool attitude differential vector at the current tool nose point when the model takes a minimum value, obtaining an optimized tool attitude differential vector at the current tool nose point, and generating an optimized tool attitude vector at the next tool nose point according to the optimized tool attitude differential vector; and finally, judging whether the current optimized tool nose point is the last point of the tool nose point track or not. According to the planning method, the requirement for smoothness is met, the requirement for cutter axis vector constraint is met, and therefore the machining quality of the workpiece is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of numerical control machining, and in particular relates to a five-axis curved surface machining trajectory planning method based on differential vector optimization. Background technique [0002] With the continuous development of modern science and technology, more and more modern products are applied, and higher requirements are put forward for these products. For example: high-speed trains, aviation aircraft, automobiles and other products all need higher speed, and their shape design needs to meet the requirements of aerodynamics. In order to obtain practical and beautiful products in daily life, further requirements are put forward for the practicability and aesthetics of daily life products, and the products that meet the above requirements are often complex curved surface products. [0003] Complex curved surfaces have been widely used in many industries. Before the advent of CNC machining technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/19
CPCG05B19/19G05B2219/35349Y02P90/02
Inventor 王振宇卢磊韩江刘海军夏链陈珊
Owner HEFEI UNIV OF TECH
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