CN103630104B - Method for measuring curvature radius of spherical basal planes of tapered rollers - Google Patents
Method for measuring curvature radius of spherical basal planes of tapered rollers Download PDFInfo
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- CN103630104B CN103630104B CN201310669213.9A CN201310669213A CN103630104B CN 103630104 B CN103630104 B CN 103630104B CN 201310669213 A CN201310669213 A CN 201310669213A CN 103630104 B CN103630104 B CN 103630104B
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Abstract
The invention provides a method for measuring the curvature radius of spherical basal planes of tapered rollers. The method comprises the following steps of enabling the coaxiality of the axis of a taper roller to be measured and a radial measuring fulcrum on the taper roller to be measured to be smaller than or equal to 2 micrometers; measuring the distance between a first measuring point outside a cavity of a spherical basal plane and the axis of the tapered roller; measuring the distance between a second measuring point on the spherical basal plane of the tapered roller to be measured and the axis of the tapered roller; measuring the perpendicular distance between the two measuring points; enabling the two measuring points and a cone peak to be positioned on the same plane circle; and calculating the curvature radius of the spherical basal plane of the tapered roller to be measured by using a formula. By using the method, the problems that the existing detecting method is a qualitative detecting method, the existing detecting technology is a qualitative detecting technology, only whether the quality of products is qualified or not can be judged, and the quality of the products cannot be quantitatively judged are solved; and measurement is accurate and meet the requirement on actual machining.
Description
Technical field
The invention belongs to field of measuring technique, relate to a kind of method measuring spherical base surface of tapered roller radius of curvature.
Background technology
It is improper that bearing conical roller ball basal plane radius of curvature controls, and can directly contribute bearing axial carrying capacity and decline and gear
While the hidden danger of quality burnt to death, it is substantially reduced service life and the reliability of bearing.Therefore, during Production of bearing, need to be to circular cone
The ball basal plane radius of curvature of roller is controlled.At present, the measurement of bearing industry taper roll bearing ball basal plane is bar none
Model measuring method is used to carry out control and the detection of radius of curvature.That is the method is come by the large and small model of model
Control the range of work of spherical base surface of tapered roller radius of curvature, and the range of curvature radius of spherical base surface of tapered roller is less, curvature
Radius change scope is little, the skill when spherical base surface of tapered roller radius of curvature being carried out qualitative detection with model, to gauger
Art and skill requirement are higher, can only qualitatively judge ball basal plane radius of curvature whether qualified and cannot know ball basal plane radius of curvature
Exact value, measurement error is very big, it is impossible to realize the quality objective controling effectively the rib contact rate of bearing.
Summary of the invention
It is an object of the invention to provide a kind of method measuring spherical base surface of tapered roller radius of curvature, taper roller can be obtained
The exact value of ball basal plane radius of curvature, quantitatively judges ball basal plane radius of curvature the most qualified, and certainty of measurement is high, it is achieved to bearing
The quality objective that rib contact rate control effectively.
For achieving the above object, the technical solution adopted in the present invention is: a kind of measurement spherical base surface of tapered roller curvature half
The method in footpath, can obtain the exact value of spherical base surface of tapered roller radius of curvature, and certainty of measurement is high, it is possible to realize bearing edge guard
The quality objective that contact rate control effectively, this measuring method specifically sequentially includes the following steps:
Step 1: the radial measurement fulcrum in Precision Machining spherical base surface of tapered roller to be measured cave and this taper roller to be measured, makes
The axiality of this radial measurement fulcrum and this taper roller axis to be measured is less than or equal to 2 μm；
Step 2: selected first measurement on the ball basal plane outside spherical base surface of tapered roller cave to be measured after step 1 Precision Machining
Point, records the distance between the first measurement point and taper roller axis to be measured；
Step 3: on spherical base surface of tapered roller to be measured, move the first measurement along the direction away from taper roller axis to be measured
Point, to the second measurement point being positioned at inside ball basal plane chamfering, first measures point, the second measurement point and cone apex is positioned at same flat
On the circle of face, record the distance between the second measurement point and taper roller axis to be measured, record the second measurement point and first simultaneously and survey
Vertical dimension between amount point；
Step 4: calculate spherical base surface of tapered roller radius of curvature to be measured by below equationSR:
In formula: L1 is the distance between the first measurement point and taper roller axis；L is the second measurement point and taper roller axle
Distance between line；Δ h is the vertical dimension that the first measurement point and second measures between point.
In described step 3, the second measurement point must be positioned on the ball basal plane of taper roller to be measured, does not occurs with non-machined surface
Interfere, avoid ball basal plane cave and chamfering coordinate dimension.
Measuring method of the present invention mainly by accurately measure affect some principal elements such as center chord length of ball basal plane curvature,
After the parameters such as basal plane drop, more simply weaved into the radius of curvature accurately calculating roller ball basal plane by computer；Obtain circular cone rolling
The exact value of bulbec basal plane radius of curvature, quantitatively judges curvature radius of roller ball base level the most qualified, has higher measurement
Precision, it is achieved that the quality objective that bearing edge guard contact rate is control effectively.
Accompanying drawing explanation
Schematic diagram when Fig. 1 is to use measuring method of the present invention measurement spherical base surface of tapered roller radius of curvature.
Detailed description of the invention
The present invention is described in detail with detailed description of the invention below in conjunction with the accompanying drawings.
In taper roll bearing production process, spherical base surface of tapered roller radius of curvature need to be controlled, and then to bearing
Rib contact rate control effectively.But it is the most all to use model that spherical base surface of tapered roller radius of curvature is detected, surveys
Technology and the skill requirement of amount person are higher, and (can only control two kinds of limit samples of ball basal plane curvature by the large and small model of model
Plate) whether qualified qualitative judgement ball basal plane radius of curvature is and cannot know the exact value of ball basal plane radius of curvature, measurement error
Greatly, it is impossible to realize the quality objective that bearing edge guard contact rate is control effectively.Deposit to overcome in above-mentioned prior art
Problem, the invention provides a kind of method measuring spherical base surface of tapered roller radius of curvature, can quantitatively obtain taper roller
The exact value of ball basal plane radius of curvature, certainty of measurement is high, and technology and skill requirement to gauger are relatively low, it is possible to realize countershaft
Hold the quality objective that rib contact rate control effectively.This measuring method specifically sequentially includes the following steps:
Step 1: the radial measurement fulcrum in Precision Machining (such as match grinding) spherical base surface of tapered roller to be measured cave and this circle to be measured
Cone roller, makes the axiality of this radial measurement fulcrum and this taper roller axis to be measured less than or equal to 2 μm；
Step 2: by the radial measurement fulcrum in the spherical base surface of tapered roller cave to be measured after Precision Machining in step 1 along to be measured
The ball basal plane of taper roller moves radially, and moves to the first measurement point A outside spherical base surface of tapered roller cave to be measured, such as Fig. 1
Shown in, record distance L1 between the first measurement point A and taper roller axis to be measured, in order to the numerical value of convenience of calculation distance L1 is most
Measure integer value；
Step 3: radial measurement fulcrum is measured the some A radial direction along the ball basal plane of taper roller to be measured to away from treating from first
The direction surveying taper roller axis is moved, and moves to the second measurement point B, and second measures a some B is positioned at inside ball basal plane chamfering, records the
Two measure distance L between some B and taper roller axis to be measured, it is contemplated that more convenient during calculating, and distance L is tried one's best round numbers
Value, records the second measurement point B and first simultaneously and measures the vertical dimension Δ h between some A；
During measurement, two selection principles measuring point are: 1) first measure some A, the second measurement point B and taper roller
Cone apex O(outer surface of cone extend intersection point) must be positioned at same plane circle on；2) first point A and second measurement is measured
Point B must be positioned on the ball basal plane of taper roller to be measured, does not interfere with non-machined surface, avoids ball basal plane cave and chamfering coordinate
Size, it is ensured that measure the accuracy of numerical value；
Step 4: calculate spherical base surface of tapered roller radius of curvature to be measured by below equationSR:
In formula: L1 is the distance between the first measurement point and taper roller axis；L is the second measurement point and taper roller axle
Distance between line；Δ h is the vertical dimension that the first measurement point and second measures between point.
The origin of formula (1):
As a example by 32320 type taper roll bearings, in this bearing, the ball basal plane cave on the taper roller of use is a diameter of
16mm, design drawing requires that ball basal plane radius of curvature SR of this taper roller is 425mm.In production process, in order to make product
Quality reaches requirement, uses the inventive method to measure ball basal plane radius of curvature SR of this taper roller: the ball outside ball basal plane cave
Selected first measurement A on basal plane, distance L1 recorded between the first measurement point A and this taper roller axis is 10mm, at this circle
The ball basal plane Shang Yanyuan road taper roller axis direction traverse measurement point of cone roller, and selected second measurement point B, first measures
Point A, the second measurement point B and cone apex O are generally aligned in the same plane on circle；First measures a some A and second measurement point B is respectively positioned on to be measured
On the ball basal plane of taper roller, do not interfere with non-machined surface, avoid ball basal plane cave and chamfering coordinate dimension；Record second
Distance L measured between some B and this taper roller axis is 13mm, records the first measurement point A and second simultaneously and measures between some B
Vertical dimension Δ h be 0.082 mm, three data that will record substitute into formula (1), are calculated this spherical base surface of tapered roller
Radius of curvature SR is 421mm, meets Design Requirement Drawing.
Measuring method of the present invention revolutionizes existing ball basal plane radius of curvature and uses inaccurate model to carry out qualitative survey
The present situation of amount, accurately calculates spherical base surface of tapered roller radius of curvature by indirect measurement data, it is ensured that bearing finished products is to roller
Ball basal plane and the highly consistent prescription of inner ring large-flange contact rate.Solve existing detection method and technology is qualitative inspection
Survey, only can determine whether that product quality is the most qualified, and cannot be carried out the whether qualified problem quantitatively judged；Make to measure more smart
Really, it is more nearly actual processing request.
Claims (2)
1. the method measuring spherical base surface of tapered roller radius of curvature, can obtain the accurate of spherical base surface of tapered roller radius of curvature
Numerical value, certainty of measurement is high, it is possible to realize the quality objective controling effectively bearing edge guard contact rate, it is characterised in that should
Measuring method specifically sequentially includes the following steps:
Step 1: the radial measurement fulcrum in Precision Machining spherical base surface of tapered roller to be measured cave and this taper roller to be measured, makes this footpath
To measuring the axiality of fulcrum and this taper roller axis to be measured less than or equal to 2 μm；
Step 2: selected first measurement point on the ball basal plane outside spherical base surface of tapered roller cave to be measured after step 1 Precision Machining,
Record the distance between the first measurement point and taper roller axis to be measured；
Step 3: on spherical base surface of tapered roller to be measured, move the first measurement point along the direction away from taper roller axis to be measured,
To the second measurement point being positioned at inside ball basal plane chamfering, first measures point, the second measurement point and cone apex is generally aligned in the same plane
On circle, record the distance between the second measurement point and taper roller axis to be measured, record the second measurement point and first simultaneously and measure
Vertical dimension between point；
Step 4: calculate spherical base surface of tapered roller radius of curvature to be measured by below equationSR:
In formula: L1 is the distance between the first measurement point and taper roller axis；L be the second measurement point with taper roller axis it
Between distance；Δ h is the vertical dimension that the first measurement point and second measures between point.
2. the method measuring spherical base surface of tapered roller radius of curvature as claimed in claim 1, it is characterised in that described step 3
In second measure point be positioned on the ball basal plane of taper roller to be measured, do not interfere with non-machined surface, avoid ball basal plane cave and fall
Angular coordinate size.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310669213.9A CN103630104B (en) | 2013-12-11 | 2013-12-11 | Method for measuring curvature radius of spherical basal planes of tapered rollers |
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| CN201310669213.9A CN103630104B (en) | 2013-12-11 | 2013-12-11 | Method for measuring curvature radius of spherical basal planes of tapered rollers |
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| CN107152902B (en) * | 2017-07-21 | 2019-05-07 | 江阴全华丰精锻有限公司 | With spherical surface, there are the arc surface detection method and its special gauge of centre bore part |
| CN108917689B (en) * | 2018-08-01 | 2021-01-22 | 京东方科技集团股份有限公司 | Curvature radius measuring apparatus and measuring method thereof |
| CN112254616B (en) * | 2020-09-07 | 2022-02-25 | 洛阳汇工轴承科技有限公司 | Radius measuring instrument and measuring method for spherical basal plane of conical roller |
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| JP2000136926A (en) * | 1998-10-30 | 2000-05-16 | Nikon Corp | Measuring apparatus for shape evaluation index |
| CN101344370B (en) * | 2008-08-20 | 2010-07-14 | 万向集团公司 | Measuring method for curvature radius of roller ball base level |
| JP5345568B2 (en) * | 2010-02-02 | 2013-11-20 | 公益財団法人鉄道総合技術研究所 | Method for measuring curvature and curve radius of railway tracks |
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Non-Patent Citations (1)
| Title |
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| 圆锥滚子端面球形半径的测量;王因明等;《轴承》;19881231(第2期);正文第1-2节，图4 * |
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