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Kinematics-based five-axis numerical control machining tool attitude planning method

A technology for machining tools and kinematics is applied in the field of kinematics-based five-axis CNC machining tool attitude planning, which can solve the problems of difficult control and low attitude planning accuracy, and achieve the effects of reducing interference, preventing accidents and improving processing efficiency.

Active Publication Date: 2019-02-22
武汉武科伺服机电设备有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a kinematics-based five-axis CNC machining tool attitude planning method to solve the problem of low accuracy and difficult control of multi-axis machine tool attitude planning in the prior art

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  • Kinematics-based five-axis numerical control machining tool attitude planning method
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  • Kinematics-based five-axis numerical control machining tool attitude planning method

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Embodiment Construction

[0046] In this paper, the tool axis vector is defined as the vector description of the tool axis direction in the workpiece coordinate system. The tool axis vector is defined as the vector description of the tool axis direction in the workpiece coordinate system, and the tool position point P on the same tool path is used L,i Tool axis vector v i The adjacent tool point P L,i-1 and P L,i+1 Tool axis vector v i-1 and v i+1 The change of the vector is used as the measure of the vector description. Specifically, the sum of the squares of the angles between adjacent tool axis vectors and then the square root is used as the measure index. The above measure index Δv 1That is to say, it is the measure index of tool axis vector smoothness;

[0047]

[0048] In the formula (1), i represents the tool position point sequence on the same tool path in the tool position file, N L It is the total number of tool positions on the same tool path.

[0049] The prior art shows that larg...

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Abstract

The invention discloses a kinematics-based five-axis numerical control machining tool attitude planning method, which comprises the steps of: defining a tool axis vector as a vector description of a tool axis direction in a workpiece coordinate system; adopting variations of a tool axis vector v at a tool location point P<L, i>, and tool axis vectors v<i-1> and v<i+1> at tool location points P<L, i-1> and P<L, i+1> adjacent to the tool location point P<L,i> on the same tool path as metrics of the vector description; specifically adopting a value obtained through extracting root of a sum ofsquares of included angles between the adjacent tool axis vectors as metric indexes; and establishing a tool axis vector integral smoothing model considering kinematics space mapping based on a universal structure machine tool kinematics model and tool axis vector smoothing metric indexes, and completing tool attitude planning method. The kinematics-based five-axis numerical control machining toolattitude planning method greatly improves the machining precision and machining efficiency of the multi-axis numerical control machine tool, reduces interference between the tool and the workpiece, and prevents the occurrence of accidents.

Description

technical field [0001] The invention belongs to the field of machine tool processing, and relates to a tool attitude planning method, in particular to a kinematics-based five-axis numerical control machining tool attitude planning method. Background technique [0002] The two axes of rotation introduced by five-axis machining make it possible to avoid interference, obtain better surface quality and increase machining efficiency. The planning based on the feasible space can avoid various interference collisions between the tool and the workpiece, and the planning based on the deviation of the tool from the quantum space can improve the machining accuracy. However, the rotary axis can achieve more postures and puts higher requirements on the tool path planning. The tool axis vector planning at a single tool position can pursue the highest possible processing efficiency or accuracy. In actual production, the surface of the part is discrete. With a large number of grid tool pos...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/19
CPCG05B19/19G05B2219/45136
Inventor 张灿段现银陈昕悦张樵夏杭蒋国璋
Owner 武汉武科伺服机电设备有限公司
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