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Point Vector Enveloping Method for Determining Tool Profile in Helical Surface Forming

A technology for helical surface and forming processing, applied in the design and manufacture of helical surface forming and machining tools, and the field of helical surface manufacturing, can solve problems such as difficult to establish a general computer method, tedious formula derivation mathematical calculation, etc., which is conducive to the realization of programming , high robustness, good effect of optimization of motion trajectory

Active Publication Date: 2017-08-25
CHONGQING UNIV
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Problems solved by technology

On the one hand, the entire modeling process involves cumbersome formula derivation and a large number of mathematical calculations. It is difficult for ordinary engineering and technical personnel to master this set of theories and calculation methods; on the other hand, when using a computer to solve the model, Due to the diversification of analytical equations and their derivation calculations, it is difficult to establish a general computer method

Method used

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  • Point Vector Enveloping Method for Determining Tool Profile in Helical Surface Forming
  • Point Vector Enveloping Method for Determining Tool Profile in Helical Surface Forming
  • Point Vector Enveloping Method for Determining Tool Profile in Helical Surface Forming

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Taking the grinding of a standard involute helical gear with a profiled grinding wheel as an example, the point-vector envelope method for determining the profile of a tool in forming a helical surface includes the following steps:

[0022] 1) Point discretization is carried out on the profile line of the end face of the helical gear, and the profile line of the gear end face is discretized according to the equiangular discretization criterion, and a series of plane points evenly distributed on the profile line are obtained.

[0023] 2) Add its space vector characteristics to all discrete points on the profiled line, first determine the direction of the plane vector at each discrete point on the profiled line; then according to the self-enveloping characteristics of the helical surface, the point is represented by the plane norm...

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Abstract

The present invention discloses a point vector envelope method for determining tool profile in spiral curved surface forming processing, belonging to the manufacturing field of a spiral curved surface. Firstly, the mold line of a spiral curved surface is subjected to point discrete according to an average rule, a point vector formed by a discrete point and the normal vector of the discrete point is used completely describe a spiral discrete point, the spiral movement track of the mold line point vector is subjected to discrete, and the process of spiral curved surface envelope forming wheel is completely simulated with the envelope movement of the point vector. By using the method point vector approximation forming tool, a plane point vector envelope principle and an envelope approximation method are established, a point in a point vector family with a shortest distance to a forming tool is determined as the envelope point, and finally all envelope points are used to form a tool profile through the mode of fitting.

Description

technical field [0001] The invention belongs to the field of manufacturing spiral curved surfaces, in particular to the field of designing and manufacturing tools for forming and processing spiral curved surfaces, and relates to a point-vector envelope method for determining the profile of a tool in forming and processing spiral curved surfaces. Background technique [0002] Spiral curved surface is a kind of curved surface widely used in engineering. It is mainly used in gears, worms, spiral blades and machining tools. Forming method is a main processing method of spiral curved surface. Most of the forming tools use a revolving surface, and there is a spatial mapping relationship between the generatrix of the revolving surface and the profile line of the processed helical surface. Therefore, the calculated contour accuracy of the forming tool has a great influence on the accuracy of the final enveloped helical surface. [0003] At present, the design of rotary forming tools...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/19
CPCG05B19/19
Inventor 李国龙何坤夏冬张薇娄洋
Owner CHONGQING UNIV
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