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A method for fine-milling the tooth surface of Niemann worm gear with full blade and side edge of flat-bottomed taper milling cutter

A tooth surface and taper technology, applied in the field of CAM, can solve the problems of reducing the tool life, accelerating the local wear of the tool, reducing the machining accuracy of the tooth surface, etc., to ensure the uniformity, improve the service life, and avoid the effect of poor machining surface accuracy.

Active Publication Date: 2020-05-22
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the finishing of Niemann worm gear tooth surface generally adopts point milling with ball nose cutter or side edge milling with flat bottom end mill, but the above-mentioned processing methods all involve a single cutting point on the cutting edge, which not only accelerates the local wear of the tool, reduces The service life of the tool is shortened, and the wear error is accumulated, thereby reducing the machining accuracy of the tooth surface

Method used

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  • A method for fine-milling the tooth surface of Niemann worm gear with full blade and side edge of flat-bottomed taper milling cutter
  • A method for fine-milling the tooth surface of Niemann worm gear with full blade and side edge of flat-bottomed taper milling cutter
  • A method for fine-milling the tooth surface of Niemann worm gear with full blade and side edge of flat-bottomed taper milling cutter

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Effect test

Embodiment

[0050] A method for fine-milling the tooth surface of a Niemann worm gear with a flat-bottomed taper milling cutter on the side edge of the full blade, such as figure 1 shown, including the following steps:

[0051] Step 1: Niemann worm gear tooth surface knife contact P 1 Coordinates and tooth surface knife contact P 1 Processing vector:

[0052] Use 3D CAD software to extract the contact point P of the worm gear tooth surface 1 Coordinates (x n 、y n ,z n ) and P 1 The tooth surface normal vector at the knife contact P 1 The extraction of the normal vector of the tooth surface at the knife contact is as follows: image 3 As shown, extracted by 3D CAD software.

[0053] Step 2: Calculate the knife contact P 1 Tool axis vector of flat bottom taper end mill at

[0054] Such as Figure 4 As shown, in order to control the swing angle of the knife shaft, it should be ensured that the tool contact P 1 The generatrix of the tool cone is always parallel to the end f...

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Abstract

The invention discloses an algorithm for finely milling a tooth surface of a Niemann worm gear by a full-edge side edge of a flat-bottom taper milling cutter. The method comprises the following stepsof: (1) extracting coordinates of a Niemann worm gear tooth surface cutter contact point P1 and a normal vector at the tooth surface cutter contact point P1; (2) calculating a cutter shaft vector of the flat-bottom taper end milling cutter at the cutter contact point P1; (3) solving a projection point P1t projected to a cutter shaft by the cutter contact point P1 along the tooth surface normal vector; (4) solving a cutter point C0 of the point P1t projected to the bottom surface of the cutter in the negative direction of the cutter shaft vector; (5) calculating a cutter shaft vector and a cutter point of each cutter contact on the tooth surface of the Niemann worm gear; and (6) checking and processing cutter interference. Operation is complete. The service life of the cutter can be effectively prolonged, and the machining accuracy, speed and stability of parts are improved.

Description

technical field [0001] The invention belongs to the technical field of CAM, and in particular relates to a method for finely milling the tooth surface of a Niemann worm gear with a flat-bottomed taper milling cutter with full blades and side edges. Background technique [0002] With the advancement of CAD and CAM, the complex surface digital manufacturing technology has developed rapidly, a large number of high-performance parts have emerged, and the modern manufacturing industry has taken on a new look. The Niemann worm gear pair was invented by Professor Niemann of Germany (also known as ZC1 worm drive). It has the advantages of high transmission precision, high transmission efficiency, and long service life. It is currently widely used in metallurgy, environmental protection, aerospace and other industries. The Niemann worm gear pair is a double-enveloping cylindrical worm transmission. The tooth surface of the worm is enveloped by an arc-shaped grinding wheel, which is i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23F11/00
CPCB23F11/00
Inventor 孙全平张政吴海兵
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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