CN1776362A - Angular contact ball bearing outer ring groove position instrument measuring method - Google Patents

Abstract

The invention includes steps: selecting outer ring with deep channel of ball bearing in relevant near type under same curvature and diameter of channel; measuring size of channel position of ball bearing with deep channel precisely; after calculating filtration obtains standard component of channel position for outer ring of angular contact ball bearing; using channel position checking-gauge for ellipticity of channel diameter of ball bearing carries out detection of channel position for batch products by reading meter under same instrument through method of comparison. Characters are: (1) changing observational measurement to quantitative measurement; (2) easy of operation, quick measuring and visual display; (3) high precision; (4) reflecting real deviation of channel position; (5) saving cost for preparing template.

Description

Angular contact ball bearing outer ring groove position instrument measuring method

Technical field

The invention belongs to a kind of apparatus measures method of ball bearing outer ring groove position.Relate generally to a kind of apparatus measures method of angular contact ball bearing outer ring groove position, utilize this method can directly on detecting instrument, read the actual deviation value of angular contact ball bearing outer ring groove position.

Background technology

The design feature of angular contact ball bearing outer ring as shown in Figure 1.The b point is the point on the raceway groove center line, and is longer near the ditch shape circular arc ab of datum end face 1, and has only a few tenths of a mm to seem very short near the ditch shape circular arc bc of non-datum end face 2 because of hold depth (being the radially semidiameter between the bc).

In bearing industry, ditch position deviation Δ a _eThe detection control method normally adopt ditch position model light gap method to estimate judgement, checking more than 3 on the circumference during measurement, model should be by the center of lasso during measurement, its locating surface should abut against on the reference field of lasso, under light, observe the curved surface circular arc of big model 6, little model 5 and the light slit distribution situation that the lasso raceway groove forms then, when big model 6 occurs as shown in Figure 2 saturating seam 3 on one side near datum end faces, on one side and little model 5 when as shown in Figure 3 saturating seam 4 occurring near non-datum end faces the ditch location determination be qualified; As big model or little model all thoroughly seam or saturating seam equate, also be qualified; Otherwise it is defective all to be considered as the ditch position.

There is following drawback in this detection method:

1. can only qualitatively judge, can not be accurately, quantitative measurment;

2. when technological requirement looser (about ± 0.05mm), and the processing of ditch position is when the limit, as shown in Figure 1, bigger between ab circular arc and the big model model because of wrap angle sigma, institute printing opacity crack is bigger, also easily judge to have or not light slit to see through, but the cornerite β between bc circular arc and the little model model is very little the very faint extremely difficult judgement in institute printing opacity crack.And the ditch position is if require more sternly when the ± 0.03mm left and right sides, and because of cornerite β is too little, the light slit that sees through almost can't be judged.Therefore because the skill level difference that the testing staff grasps detection method, the result of determination of actual ditch position also is not quite similar.Judgment varies with each individual, and causes the erroneous judgement of actual ditch position to happen occasionally;

3. when position of related features was strict, range estimation (observing) error itself just can not satisfy product requirement;

4. during because of randomized test, natural light or the illumination of lathe lighting own that processing site uses are lower, and the light that sees through the slit is fainter, can directly have influence on the accuracy of judgement;

5. sample making expense height, cycle are long, and complex operation causes testing process slow.

Summary of the invention

The purpose of this invention is to provide a kind of angular contact ball bearing outer ring groove position instrument measuring method.Utilize this method can directly on detecting instrument, read the actual deviation value of angular contact ball bearing outer ring groove position.

The purpose of this utility model can adopt following technical scheme to realize: the present invention utilizes ditch center line both sides, deep groove ball bearing outer ring circular arc symmetry, be easy to accurately measure the characteristics of ditch position, to angular contact ball bearing outer ring to be detected, it is identical at first to choose ditch curvature, the corresponding model deep groove ball bearing outer ring that the ditch diameter dimension is approaching with it, deep groove ball bearing outer ring groove position size value by accurate mensuration, as calculated after the screening, ditch location criteria part as angular contact ball bearing outer ring, use ball bearing ditch footpath ovality ditch position detection instrument then, on same instrument, use the comparison method, the product of producing in batches is carried out the meter reading of ditch position deviation detect.

Measuring method of the present invention may further comprise the steps:

1, the angular contact ball bearing outer ring groove position standard component choosing and calculating

(1) choose the outer number of turns part of the approaching with it corresponding model deep groove ball bearing of ditch curvature identical (nominal size), ditch diameter dimension, choose the plane parallel difference of part and outer fissure pendulum all should≤2 μ m.

(2) use height calibrated bolck C behind his-and-hers watches on the height instrument, accurately measure the true altitude C of candidate's standard component _sAnd number record.

(3) on ball bearing ditch footpath ovality ditch position detection instrument, by measuring and calculate the ditch center to the distance A of two end faces of bearing ring and the difference of B, be ditch position phase mutual deviation | A-B|, and, calculate the actual ditch position of each part with following formula by after the number record.

$A^{+}=\frac{C_s+|A-B|}{2}$ ①

$A^{-}=\frac{C_s-|A-B|}{2}$ ②

A ⁺---the ditch center is in the distance A and B of two end faces of bearing ring, and relative distance is the ditch position of one side greatly.

A ^----the ditch center in the distance A and B of two end faces of bearing ring, the ditch position of the less one side of relative distance.

(4) determine the ditch location criteria part selected for use: will be by candidate's standard component of number record with above-mentioned 1., 2. after two formula calculate respectively, can choose result of calculation near or the one side that equals integer as reference field, and this plane is the reference field of measurement angular contact ball bearing outer ring groove position, and obviously marks the calculating ditch positional value of reference field on its corresponding end face with the electrograving pen.Then this part product is defined as ditch location criteria part, and the ditch position is defined as a _E1

2, his-and-hers watches

With selected ditch location criteria part ditch position a _E1, on same surveying instrument, measured angular contact ball bearing ditch position a _E2To table position: a _E1-a _E2=a _E3, a _E3Point is technology his-and-hers watches zero points.

3, use

Adjust under the qualified situation in ditch position and other geometric accuracy, the processing of the raceway groove of angular contact ball bearing can drop into batch process, and the indicating value on the ditch position measurement table promptly is the actual ditch position deviation a of this workpiece _e

The present invention has following characteristics:

(1) set is measured as quantitative measurment; (2) simple to operate easy-to-use, measure quick and precisely, the indicating value intuitive and convenient; (3) measuring accuracy can be accurate to 1 μ m (0.001mm torsion spring table); (4) directly reflect the physical location deviation of raceway groove, can not have misjudgment phenomenon; (5) both saved the manufacturing expense of model, simplified operating process, improved measuring accuracy simultaneously again,, laid a good foundation at the parts measurement technical elements for the processing technology of research angular contact ball bearing combination technique.

Description of drawings

Accompanying drawing 1 is the structural representation of angular contact ball bearing outer ring.

Accompanying drawing 2 is for measuring the big model light slit enlarged diagram of ditch position deviation in the model light gap method.

Accompanying drawing 3 is for measuring the little model light slit enlarged diagram of ditch position deviation in the model light gap method.

The instrumentation plan of the deep groove ball bearing outer ring groove position phase mutual deviation that accompanying drawing 4 is identical with angular contact ball bearing outer ring groove curvature.

The instrumentation plan of accompanying drawing 5 angular contact ball bearing outer ring groove position instrument measuring methods.Among the figure: 1, measuring basis face, 2, measure non-reference field, 3, big model stitches thoroughly, 4, little model stitches thoroughly, 5, little model, 6, big model, 7, ball bearing ditch footpath ovality ditch position detection instrument,

Embodiment

The angular contact ball bearing outer ring groove road of existing preprocessing 7308EACM/01 model, product height dimension C=23mm, ditch curvature Re=R7.92mm, ditch footpath dimension D e=φ 80.694mm, ditch position a _e=11.62 ± 0.03.Need diagonal angle contact ball bearing outer ring groove position to measure with instrument.

Measuring method of the present invention may further comprise the steps:

1, ditch location criteria part choosing and calculating

Select 6308E/01 deep groove ball bearing finished product outer ring with the corresponding model of 7308EACM/01, its height dimension also is C=23mm, ditch curvature Re=R7.92mm, ditch footpath dimension D e=φ 80.594mm can be as the candidate products of selecting 7308EACM/01 ditch location criteria part for use.

(1) choose 4 of 6308E/01 finished product outer rings, choose the plane parallel difference and the outer fissure of part and put all≤2 μ m, this requirement is mainly used in the making error that reduces standard component.

(2) with 23mm height standard component accurate true altitude and number record of measuring candidate's standard component on G904 height instrument.

1#22.98 2#22.976 3#22.98 4#22.982

(3) with the candidate's standard component shown in the accompanying drawing 4, go up by measuring and calculate the ditch center at surveying instrument 7 (ball bearing ditch footpath ovality ditch position detection instrument D012) as shown in Figure 5 to the distance A of two end faces of bearing ring and the difference of B, be ditch position phase mutual deviation | A-B|, and by number record.

| the A-B| value is: 1#0.008 2#0.014 3#0.020 4#0.010

$A^{+}=\frac{C_s+|A-B|}{2}$ ①

$A^{-}=\frac{C_s-|A-B|}{2}$ ②

According to formula 1., 2. calculate respectively each part actual ditch position (unit: mm):

1# A ⁺＝11.494 A ^-＝11.486

2# A ⁺＝11.495 A ^-＝11.481

3# A ⁺＝11.500 A ^-＝11.480

4# A ⁺＝11.496 A ^-＝11.486

(4) determine the ditch location criteria part selected for use: because of the A of 3# ⁺Face is that 11.500 just in time relative other data are an integer, thus get as reference field, and on corresponding end face, obviously mark calculating location with the electrograving pen.Then this part product determines that the ditch position is defined as 11.500mm as standard component.

3. his-and-hers watches

(1) with fixed 6308E/01 ditch position a _E1=11.500mm on same surveying instrument D012, measures 7308EACM/01 ditch position a _E2=11.62 ± 0.03.To table position a _E3=a _E1-a _E2=11.500-11.62=-120 μ m, then-120 μ m point is technology his-and-hers watches zero points.

(2), and use the D012 instrument because of | 11.500-11.62|＞100 μ m, thus for mill processing, the torsion spring table that with range is 200 μ m behind+100 μ m place his-and-hers watches, 11.500-11.62-0.1=-20 μ m, then showing-20 μ m is technology his-and-hers watches zero points.

Points for attention in the his-and-hers watches: in use in the D012 instrument his-and-hers watches process, "+" "-" value that reflects on the meter is just in time opposite with "+" "-" of actual ditch position, and it is relevant with the structure of detecting instrument.

4. use

So far, adjust under the qualified situation in other geometric accuracy, the processing of the raceway groove of 7308EACM/01 can drop into batch process, and the indicating value on the ditch position measurement table promptly is the actual ditch position deviation value a of this workpiece _eCan calculate the actual value of ditch position by actual deviation.

Claims (2)

1, a kind of angular contact ball bearing outer ring groove position instrument measuring method, it is characterized in that: at first choose the corresponding model deep groove ball bearing outer ring that ditch curvature is identical, the ditch diameter dimension is approaching with it, deep groove ball bearing outer ring groove position size value by accurate mensuration, as calculated after the screening, ditch location criteria part as angular contact ball bearing outer ring, use ball bearing ditch footpath ovality ditch position detection instrument then, on same instrument, use the comparison method, the product of producing in batches is carried out the meter reading of ditch position deviation detect.

2, angular contact ball bearing outer ring groove position instrument measuring method according to claim 1: it may further comprise the steps:

The choosing and calculating of a, angular contact ball bearing outer ring groove position standard component

(1) choose the outer number of turns part of ditch curvature is identical, the ditch diameter dimension is approaching with it corresponding model deep groove ball bearing, choose the plane parallel difference of part and outer fissure pendulum all should≤2 μ m;

(2) use height calibrated bolck C behind his-and-hers watches on the height instrument, accurately measure the true altitude Cs and the number record of candidate's standard component;

(3) on ball bearing ditch footpath ovality ditch position detection instrument, by measuring and calculate distance A and the difference of B, i.e. the ditch position phase mutual deviation of ditch center to two end faces of bearing ring | A-B|, and by number record, calculate the actual ditch position of each part then as follows respectively

$A^{+}=\frac{C_S+|A-B|}{2}$ ①

$A^{-}=\frac{C_S-|A-B|}{2}$ ②

(4) determine the ditch location criteria part selected for use: will be by candidate's standard component of number record with above-mentioned 1., 2. after two formula calculate respectively, can choose result of calculation near or the one side that equals integer as reference field, and this plane is for measuring the reference field of angular contact ball bearing outer ring groove position, and with electrograving pen obvious calculating ditch positional value of mark reference field on its corresponding end face, then this part product is defined as ditch location criteria part, and the ditch position is defined as a _E1,

B, his-and-hers watches

With selected ditch location criteria part ditch position a _E1, on same surveying instrument, measured angular contact ball bearing ditch position a _E2, to table position: a _E1-a _E2=a _E3, a _E3Point is technology his-and-hers watches zero points,

C, use

Adjust under the qualified situation in ditch position and other geometric accuracy, the processing of the raceway groove of angular contact ball bearing can drop into batch process, and the indicating value on the ditch position measurement table promptly is the actual ditch position deviation a of this workpiece _e

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