Method for measuring tooth profile deviation of cylindrical gear based on linear structured light

A technology of cylindrical gear and line structured light, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of limited measurement speed, inability to collect tooth profile data, and unreliable tooth profile data.

Active Publication Date: 2018-01-16
BEIJING UNIV OF TECH
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Problems solved by technology

[0004] When measuring cylindrical gears with online structured light, there are three difficulties that hinder the popularization and application of non-contact gear measurement: First, the characteristics of structured light itself limit the measurement and cannot be directly measured in the radial direction.
Structured light is composed of a series of light spots with equal spacing. If the structured light is directly projected radially to measure the gear, the tooth profile data will be unreliable.
Second, due to the influence of the surface topogra

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  • Method for measuring tooth profile deviation of cylindrical gear based on linear structured light
  • Method for measuring tooth profile deviation of cylindrical gear based on linear structured light
  • Method for measuring tooth profile deviation of cylindrical gear based on linear structured light

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Embodiment Construction

[0058] A method for measuring the deviation of the cylindrical gear tooth profile based on line structured light will be further described below with reference to the accompanying drawings. Such as Figure 6.1-6.2 , this method can be applied to both the vertical measuring machine and the horizontal measuring machine, and the vertical measuring machine is taken as an example for illustration.

[0059] The vertical measuring machine includes a spindle unit, a measuring unit and a machine bed, and the spindle unit and the measuring unit are installed on the machine bed. The spindle unit includes a spindle and a tailstock, the θ-axis circular grating is connected to the spindle, and the Y-axis grating is installed on the Z-axis to measure the movement of the surveying unit along the Y direction; the surveying unit includes a Z-direction moving rod, an X-direction moving rod and a structured light probe , The Z-axis grating is installed on the Y-axis moving rod to measure the mov...

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Abstract

The invention discloses a method for measuring the tooth profile deviation of a cylindrical gear based on linear structured light. According to the method, firstly a three-dimensional nominal mathematical model of the tooth surface of a measured gear is built; the structured light is formed by a series of equally spaced light spots, and the operation is performed based on characteristics of the structured light and within an effective value range of the structured light; a mathematical model of a gear tooth profile deviation item is built; and finally high-precision measurement for the tooth profile total deviation, the tooth profile slope deviation and the tooth profile shape deviation of the cylindrical gear is realized. According to the invention, detection for each tooth of the cylindrical gear in a complex environment can be realized, the measurement speed is high, and the efficiency is high; the method can adapt to detection for various types of cylindrical gears and does not have problems such as measuring head abrasion and radius compensation; the measurement accuracy can be improved through big data, the repeatability is good, and a shadow effect in gear detection is avoided. Tooth profile error calculation can be performed on all measured data transformed into a gear coordinate system, and the method is high in calculation speed.

Description

technical field [0001] The invention relates to a method for measuring the tooth profile deviation of a cylindrical gear based on line structured light, and belongs to the technical fields of precision testing technology, instrument and gear detection. Background technique [0002] Tooth profile deviation is the amount by which the actual tooth profile deviates from the nominal tooth profile, and is one of the most important indicators of the smoothness of gear transmission. At present, the main methods of tooth profile deviation measurement are: generation method, coordinate method, projection method and meshing method, but these four methods have their own trade-offs in terms of measurement efficiency, measurement gear type, and economic cost. Taking cylindrical gears as an example, a measurement method with fast speed, high efficiency, accurate measurement and the ability to measure gears with different parameters will be a revolution in the field of gear detection techno...

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Application Information

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IPC IPC(8): G01B11/24
Inventor 石照耀王涛林家春
Owner BEIJING UNIV OF TECH
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