Impeller machining tool path global optimization method

A technology for overall optimization and cutting tools, applied in program control, instrumentation, electrical program control, etc., can solve the problems of destroying the surface of parts, restricting applications, huge computing resources and time, etc., to achieve fast calculation, reduce space storage and time Effect

Active Publication Date: 2017-08-18
HUAZHONG UNIV OF SCI & TECH +1
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Problems solved by technology

[0003] However, five-axis CNC machining has the following disadvantages: (1) The increase of two rotational degrees of freedom leads to an increase in the complexity of tool attitude control, which limits its application in actual machining to a certain extent; (2) At the same time, during machining The sharp change of the tool axis vector will also produce cut marks on the surface of the part, or even destroy the surface of the part, s

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  • Impeller machining tool path global optimization method
  • Impeller machining tool path global optimization method
  • Impeller machining tool path global optimization method

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Embodiment Construction

[0052] 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.

[0053] A preferred embodiment of the present invention provides a method for overall optimization of the impeller machining tool path, comprising the following steps:

[0054] (1) Triangulation of impeller model and cutter model

[0055] S11: Coordinate the model coordinate system, machining coordinate system and absolute coordinate system of the impeller model, establish the model coordinate s...

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Abstract

The invention discloses an impeller machining tool path global optimization method, which comprises the following steps: S1) carrying out discrete triangularization on an impeller model and a tool model; S2) planning a trajectory of contact points between tools and an impeller, and calculating a tool position point trajectory; S3) judging a reachable direction cone of each tool position point by utilizing interference checking; S4) establishing a global optimization objective function of cutter-axis vector, construction a constrained single-source directed graph and converting the optimization solving problem of the objective function into the shortest path finding problem; and S5) solving the objective function by utilizing a shortest path finding algorithm to obtain an optimal tool orientation. The method can quickly calculate the reachable direction cone of each tool and realizes overall fairing of the cutter-axis vector.

Description

technical field [0001] The invention relates to the technical fields of computer-aided manufacturing and numerical control machining, and more specifically, relates to an overall optimization method for tool paths in impeller machining. Background technique [0002] Turbomachinery has a wide range of applications in the fields of aviation, aerospace, energy, transportation, water conservancy, chemical industry and petroleum. Two of the three core components of aero-engines belong to turbomachinery, and the key components of steam and gas turbines are also turbomachinery. The impeller is the core part of turbomachinery, and its quality has a decisive impact on the performance of this type of product. Therefore, the design and manufacture of the impeller directly affects the quality and performance of the impeller. Five-axis CNC machining is an important means of processing complex high-performance parts in the industry. Compared with three-axis machining, the advantage of f...

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Application Information

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IPC IPC(8): G05B19/19
CPCG05B19/19G05B2219/45136
Inventor 杨建中吴界高嵩张成磊王天正
Owner HUAZHONG UNIV OF SCI & TECH
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