CN102954784B - A kind of casing jitter values Measurement and Data Processing method - Google Patents

A kind of casing jitter values Measurement and Data Processing method Download PDF

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Publication number
CN102954784B
CN102954784B CN201210442583.4A CN201210442583A CN102954784B CN 102954784 B CN102954784 B CN 102954784B CN 201210442583 A CN201210442583 A CN 201210442583A CN 102954784 B CN102954784 B CN 102954784B
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casing
jitter values
alignment
cylindrical
circularity
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CN102954784A (en
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王东
田静
吕春光
邱明星
刘宇
白素娟
杜玉洁
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AVIC Shenyang Engine Design and Research Institute
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AVIC Shenyang Engine Design and Research Institute
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Abstract

A kind of casing jitter values Measurement and Data Processing method, the casing jitter values that recorded is utilized to adopt cartesian geometry numerical value treatment process to calculate measuring surface respectively relative to the right alignment of reference axis and casing circularity, and the size of right alignment and casing circularity is expressed by geometricdrawing, it is specially: Along ent place, casing cylindrical surface 8 jitter values recorded is divided into 2 groups; Geometric figure drawing method is utilized to find the center of circle often organizing cylinder corresponding to jitter values respectively in two orthogonal coordinate systems; The mid point getting two circle center line connectings is as the center of circle on cylindrical surface corresponding to 8 point data; Then two circle center line connecting mid points are the right alignment of this cylindrical surface relative to reference axis to the distance of coordinate origin, and two circle center line connectings are the circularity on this casing cylindrical surface. The advantage of the present invention: the right alignment tolerance comprised in casing jitter values being separated with casing roundness tolerance, error calculated is less, expresses calculation result by geometricdrawing, comparatively image is understood with being convenient to.

Description

A kind of casing jitter values Measurement and Data Processing method
Technical field
The present invention relates to casing class part cylindrical right alignment tolerance and roundness tolerance inspection field, in particular to a kind of casing jitter values Measurement and Data Processing method.
Background technology
Right alignment tolerance is the important indicator limiting tested axis runout benchmark axis. Casing right alignment tolerance cannot directly be measured and obtain, it is necessary to obtained through numerical evaluation by the casing cylindrical surface jitter values recorded. But casing cylindrical surface jitter values includes right alignment and casing circularity two kinds of factors. In the past when processor box jitter values, it is believed that jitter values is maximum, the half of minimum value absolute value sum just for this reason cylindrical surface relative to the right alignment of benchmark axis. Right alignment in jitter values and casing circularity cannot be separated by aforesaid method accurately, and error is bigger.
Summary of the invention
It is an object of the invention to reduce error calculated, spy provides a kind of casing jitter values Measurement and Data Processing method.
The present invention provides a kind of casing jitter values Measurement and Data Processing method, it is characterized in that: described casing jitter values Measurement and Data Processing method utilizes the casing jitter values recorded to adopt cartesian geometry numerical value treatment process to calculate measuring surface respectively relative to the right alignment of reference axis and casing circularity, and the size of right alignment and casing circularity is expressed by geometricdrawing, it is specially:
1.1 Along ent place, casing cylindrical surface 8 jitter values that will have recorded, are divided into 2 groups, and 1,3,5,7 is first group, and 2,4,6,8 is the 2nd group;
1.2 first groups by coordinate axis of X, Y, (initial point is for O0), the 2nd group by coordinate axis of X1, Y1, (initial point is for O0); Geometric figure drawing method is utilized to find the center of circle (O and O of surveyed cylinder respectively in X, Y-coordinate system and X1, Y1 system of coordinates1);
1.3 get the mid point (O of two circle center line connectingsR) as the center of circle on this cylindrical surface after process 8 point data, O0ORWire length represents the size of this cylindrical surface relative to the right alignment of reference axis, and OO1 wire length represents the size of the circularity on this casing cylindrical surface;
1.4 utilize analytic geometry method to calculate O0ORWire length and OO1Wire length just can obtain measuring surface relative to the right alignment of reference axial direction and casing circularity; O0ORWire length is the right alignment size of this cylindrical surface relative to reference axis, O0ORWire length isOO1Wire length reflects the circularity size on this cylindrical surface, OO1Wire length is | OO 1 | = ( x 0 - x 01 ) 2 + ( y 0 - y 01 ) 2 = 2 4 ( t 2 - 2 t 3 + t 4 - t 6 + 2 t 7 - t 8 ) 2 + ( - 2 t 1 + t 2 - t 4 + 2 t 5 - t 6 + t 8 ) 2
Utilize the casing jitter values that recorded to adopt geometricdrawing, draw measuring surface relative to the right alignment of reference axial direction and casing circularity;
The casing jitter values that recorded is utilized to adopt cartesian geometry numerical value treatment process to calculate measuring surface respectively relative to the right alignment of reference axial direction and casing circularity;
The advantage of the present invention:
Casing jitter values Measurement and Data Processing method of the present invention, utilize the casing jitter values data recorded, adopt cartesian geometry numerical value treatment process, calculate measuring surface respectively relative to the right alignment of reference axial direction and casing circularity, and expressed the size of right alignment tolerance and casing roundness tolerance by geometricdrawing. The right alignment tolerance comprised in casing jitter values can be separated by present method with casing roundness tolerance, and error calculated is less, expresses calculation result by geometricdrawing, and comparatively image is understood with being convenient to.
Accompanying drawing explanation
Below in conjunction with drawings and the embodiments, the present invention is further detailed explanation:
Fig. 1 is cylindrical surface jitter values data processing method geometry figure;
Fig. 2 is embodiment 1 data processing geometry figure.
Embodiment
Embodiment 1
Present embodiments provide a kind of casing jitter values Measurement and Data Processing method, it is characterized in that: described casing jitter values Measurement and Data Processing method utilizes the casing jitter values recorded to adopt cartesian geometry numerical value treatment process to calculate measuring surface respectively relative to the right alignment of reference axis and casing circularity, and the size of right alignment and casing circularity is expressed by geometricdrawing, it is specially:
The 1.1 Along ent places, casing cylindrical surface 8 jitter values (t1��t8) that will have recorded, are divided into 2 groups, and t1, t3, t5, t7 are first group, and t2, t4, t6, t8 are the 2nd group.
1.2 by coordinate axis of X, Y, (initial point is for O0), utilize Geometric figure drawing to find out the first group of data place center of circle, cylindrical surface O. With X1��Y1For coordinate axis, (initial point is still O0), utilize Geometric figure drawing to find out and find the 2nd group of data place center of circle, cylindrical surface O1��
1.3 get the mid point (O of two circle center line connectingsR) as the center of circle on this cylindrical surface after process 8 point data, mid point ORPoint coordinate under X Y-coordinate system is:
x R = 2 8 ( t 2 + 2 t 3 + t 4 - t 6 - 2 t 7 - t 8 ) y R = 2 8 ( 2 t 1 + t 2 - t 4 - 2 t 5 - t 6 + t 8 )
1.4O0ORWire length is the right alignment size of this cylindrical surface relative to reference axis. O0ORWire length is:
| O 0 O R | = x R 2 + y R 2
OO1Wire length reflects the circularity size on this cylindrical surface. OO1Wire length is:
| OO 1 | = ( x 0 - x 01 ) 2 + ( y 0 - y 01 ) 2 = 2 4 ( t 2 - 2 t 3 + t 4 - t 6 + 2 t 7 - t 8 ) 2 + ( - 2 t 1 + t 2 - t 4 + 2 t 5 - t 6 + t 8 ) 2
Specific design method is as follows:
Certain casing installation limit is stopped bore and is respectively 0 ,-0.02 ,+0.06 ,+0.10 ,+0.12 ,+0.10 ,+0.08 ,-0.04 to 8 sampling point jitter values data.
As stated above, 8 sampling point jitter values data being divided into 2 groups, 1 group is 0 ,+0.06 ,+0.12 ,+0.08,2 group is-0.02 ,+0.10 ,+0.10 ,-0.04.
Set up system of coordinates shown in Fig. 2, the center of circle that center of circle O is 1 group of data under X Y-coordinate system, center of circle O1For at 2 groups of data X1��Y1The center of circle under system of coordinates. By the mid point O of above-mentioned calculation formula two circle center line connectingRPoint coordinate under X Y-coordinate system is (-0.0146 ,-0.076).
O in Fig. 20ORLine is the right alignment size of this cylindrical surface relative to reference axis, OO1Wire length reflects the circularity size on this cylindrical surface. By above-mentioned calculation formula, O0ORWire length is 0.077, OO1Wire length is 0.036.

Claims (1)

1. a casing jitter values Measurement and Data Processing method, it is characterized in that: described casing jitter values Measurement and Data Processing method utilizes the casing jitter values recorded to adopt cartesian geometry numerical value treatment process to calculate measuring surface respectively relative to the right alignment of reference axis and casing circularity, and the size of right alignment and casing circularity is expressed by geometricdrawing, it is specially:
1.1 Along ent place, casing cylindrical surface 8 jitter values that will have recorded, are divided into 2 groups, and 1,3,5,7 is first group, and 2,4,6,8 is the 2nd group;
1.2 first groups taking X, Y as coordinate axis, initial point is O0, the 2nd group with X1��Y1For coordinate axis, initial point is still O0; X, Y-coordinate system utilize Geometric figure drawing method find the center of circle O of surveyed cylinder; At X1��Y1System of coordinates utilize Geometric figure drawing method find the center of circle O of surveyed cylinder1;
1.3 get the mid point O of two circle center line connectingsRAs the center of circle processing this cylindrical surface after 8 point data, O0ORWire length is the size of this cylindrical surface relative to the right alignment of reference axis, OO1Wire length is the size of the circularity on this casing cylindrical surface;
1.4 utilize analytic geometry method to calculate O0ORWire length and OO1Wire length just can obtain measuring surface relative to the right alignment of reference axial direction and casing circularity;
Utilize the casing jitter values that recorded to adopt geometricdrawing, draw measuring surface relative to the right alignment of reference axial direction and casing circularity.
CN201210442583.4A 2012-11-08 2012-11-08 A kind of casing jitter values Measurement and Data Processing method Active CN102954784B (en)

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CN103308021B (en) * 2013-07-04 2015-12-09 沈阳工业大学 A kind of method of measuring workpieces deviation from circular from
CN110948179B (en) * 2019-11-27 2021-10-29 中国航发沈阳黎明航空发动机有限责任公司 Method for repairing and adjusting concentricity of main support of engine

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