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A Machining Trajectory Optimization Method Based on Parameterized Milling Force and Stability Constraints

A technology of machining trajectory and optimization method, which is applied in the field of milling to achieve the effects of improving milling efficiency and machining quality, improving accuracy, and stabilizing the feed direction and tool attitude.

Active Publication Date: 2021-12-17
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

The relevant research finally gives the machining strategy under specific conditions. For the machining accuracy, machining efficiency and tool wear of complex curved surfaces, related optimization methods and optimization strategies need to be further studied.

Method used

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  • A Machining Trajectory Optimization Method Based on Parameterized Milling Force and Stability Constraints
  • A Machining Trajectory Optimization Method Based on Parameterized Milling Force and Stability Constraints
  • A Machining Trajectory Optimization Method Based on Parameterized Milling Force and Stability Constraints

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[0065] 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.

[0066] Such as figure 1 As shown, in order to achieve the above purpose, it is first necessary to model the instantaneous undeformed cutting thickness and parametric milling force modeling considering the tool axis runout. That is, considering the tool axis runout, the relationship between the tool posture change and the instantaneous undeformed cutting thickness is considered.

[0067] The ge...

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Abstract

The invention belongs to the field of milling processing, and specifically discloses a processing trajectory optimization method based on parameterized milling force and stability constraints. Including: considering the tool axis runout and tool attitude changes, constructing the tool cutting force model, and at the same time building the milling stability model; taking the stability model as a constraint, according to the tool cutting force model to obtain the control hard point in different tool attitudes and feeds The cutting force value of the tool under the direction, and use this to classify the angle parameters of the tool attitude, so as to construct the angle parameter classification model of the non-control hard point on the parametric surface; according to the digital angle parameter classification table of a control hard point corresponding to An ideal tool path is induced by the optimal tool pose of ; with the residual height as a constraint, all tool paths on the parametric surface are obtained. The method of the invention can plan a tool path with relatively small cutting force, which is beneficial to improving the surface quality of the workpiece, processing efficiency, tool durability and the like.

Description

technical field [0001] The invention belongs to the field of milling processing, and more specifically relates to a method for optimizing a processing trajectory based on parameterized milling force and stability constraints. Background technique [0002] In the field of metal cutting, theoretical research mainly focuses on some phenomena in cutting and the explanation of the essential principles that cause these phenomena, such as milling force, processing stability, chip shape and stress, strain and strain rate, etc.; while the industry pays more attention to processing quality , efficiency, tool wear, etc. How to use the results and rules of mechanism research to optimize cutting parameters and improve processing technology is an important means to improve processing performance and reduce manufacturing costs. [0003] Based on the cutting force model and machining stability model, many scholars have studied the influence of cutting parameters such as feed direction, too...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/20G06F119/14
Inventor 闫蓉彭芳瑜吴嘉伟朱泽润唐小卫
Owner HUAZHONG UNIV OF SCI & TECH
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