High-efficiency method for generating similar-cycloid milling and slotting tool path

A grooving knife and pendulum-like technology, applied in the field of CAM, can solve the problem of low trochoidal processing efficiency, and achieve the effects of reducing the total length, reducing the load impact and improving the efficiency.

Active Publication Date: 2018-09-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] The purpose of the present invention is to provide a cycloid-like processing tool path generation method for the current situation that the existing cycloid processing efficiency is not high, which is suitable for grooving processing of equal-width curved grooves

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  • High-efficiency method for generating similar-cycloid milling and slotting tool path
  • High-efficiency method for generating similar-cycloid milling and slotting tool path
  • High-efficiency method for generating similar-cycloid milling and slotting tool path

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] Such as Figure 1-7 shown.

[0041] A trochoidal milling grooving tool path and a method for generating the same are applicable to grooving processing of equal-width curved grooves. The key is to first divide the equal-width curved groove into several equal-curvature circular grooves and straight grooves by using circular arc least square fitting, and establish the arc length mapping relationship; then, for the equal-curvature circular groove and straight groove standard The cubic spline curve is used to characterize the material boundary line formed by the tool motion envelope, the maximum step distance is determined according to the tool contact angle constraint, and the cubic spline curve is optimized with the material removal rate as the target, and an equidistant array is generated on the standard groove ;Map the array of material boundary...

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Abstract

The invention relates to a high-efficiency method for generating a similar-cycloid milling and slotting tool path. The method comprises: an equal-width curved slot is divided into a plurality of equal-curvature ring slot and straight slot standard types approximately by using arc least square fitting and an arc length mapping relationship is established; for the equal-curvature ring slot and straight slot standard types, a material boundary line formed by a tool motion envelope is represented by using a cubic spline curve, a maximum step pitch is determined according to a tool contact angle constraint, the cubic spline curve is optimized by using a material removal rate as an objective, and an equal-interval array is generated at a standard type slot; and the obtained material boundary curve array is mapped back to the equal-width curved slot, paired end-to-end connection is carried out form a G1 continuous curve, and normal biasing is carried out on the curve to form a slotting tool path. On the premise that the maximum contact angle meets the condition, the similar-cycloid tool path enables the slotting processing efficiency to be improved obviously.

Description

technical field [0001] The invention belongs to the technical field of CAM (Computer Aided Manufacturing), and relates to a machining tool track and a method for generating it, in particular to a method for generating a cycloid-like grooving tool track for equal-width curved grooves. Optimizing the shape of the tool path, an efficient machining tool path generation method under the premise of satisfying the constraint of the tool contact angle. Background technique [0002] Groove features widely exist in complex structural parts. With the increasingly wide application of high-speed milling in cavity processing, the traditional folding line or ring cutting method has full tool processing during the processing process. Due to the large contact angle between the tool and the workpiece, the tool load is too large. At the same time, at high speed Spindle motion mode is prone to overheating, which accelerates tool wear. In order to avoid excessive contact angle and give full pl...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/4097
Inventor 许可李迎光刘长青
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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