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Research on the Method of the Form Error Measurement of the Helical Gear

Author: ZhangDeBao
Tutor: XueKai；SongJian
School: Harbin Engineering University
Course: Mechanical Engineering
Keywords: Helical gear Shape error Measurement Planning Fitting model
CLC: TG86
Type: Master's thesis
Year: 2009
Downloads: 28
Quote: 0
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Abstract


Helical gear as an important transmission parts , is widely used. With the continuous expansion of production scale , the shape of the helical gear error measurement work to become a heavy burden of manufacturing enterprises , an urgent need to establish a highly efficient and reliable shape error measurement system , and therefore to carry out related research has a very important significance . Based on the measuring principle of the modeling of the helical gear tooth profile error and teeth to the error of the measurement method research, helical gear as an entity with a specific geometric shape , a tooth surface shape theoretical mathematical model and represents the actual shape fitting the mathematical model, and by comparing the two to calculate the deviation between the shape error . The main research work are summarized as follows : error measuring system consists of helical gear shape structure : according to the characteristics of the measurement error of the measurement process involved planning the content and the errors , select the a reasonable error measurement principle , the functionality of the design error measurement system and to achieve the overall program ; 2 . theoretical mathematical model of the helical gear : starting from the involute tooth profile generation mechanism and the process of the formation of the helical gear to establish the theoretical mathematical model of the helical gear , which can quickly calculate the coordinates of the tooth surface , as subsequent measuring planning and shape error calculating foundation ; 3. measurement planning method : On the basis of analysis of the geometrical characteristics of the tooth surface , to improve the sampling efficiency and error calculation accuracy goal of design measurements planning algorithm , including the sample area , the sampling point determination method of the number and distribution of the form ; helical gear fitting mathematical model : For accurate and reliable assessment of the shape error of the helical gear , the need to establish the mathematical model of the actual tooth surfaces . Based on the characteristics of the sampling point data and the tooth surface fitting accuracy requirements , establish a NURBS surface fitting algorithm derived mathematical model of a helical gear fitting : error calculation method : According to the definition of the shape error established based on fitting model error calculation method , the error term support , including tooth error and tooth error .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Tolerance techniques to measure and mechanical measuring instruments > Gear measuring its meter
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