CN1959334A - Device for detecting sphericity, and method - Google Patents
Device for detecting sphericity, and method Download PDFInfo
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- CN1959334A CN1959334A CN 200610118486 CN200610118486A CN1959334A CN 1959334 A CN1959334 A CN 1959334A CN 200610118486 CN200610118486 CN 200610118486 CN 200610118486 A CN200610118486 A CN 200610118486A CN 1959334 A CN1959334 A CN 1959334A
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Abstract
A detection device of sphere -city consists of caliper fro measuring chord height, chord gauge cup. It is featured as setting internal diameter of cup mouth to be less than external diameter of ball to be measured, fixing caliper at bottom of said cup and making measurement rod of caliper be on axle of circular center at cup mouth, setting measurement head of caliper in mouth of said cup and enabling said head to touch surface of ball to be measured. Its detecting method is also disclosed.
Description
Technical field
The present invention relates to the detection technique of sphericity, particularly relate to the detection technique of the sphericity of joint prosthesis in a kind of medical material.
Background technology
Along with the development of society, the surgical implant cause has also obtained progress at full speed, especially uses the operation of joint prosthesis, and every year was all with double-digit growth in recent years.The joint prosthesis bulb is most important parts in the joint prosthesis, and it has determined the wearing and tearing and the life-span of joint prosthesis.And the quality of joint prosthesis bulb is by the following aspects decision: 1) material, 2) sphericity, 3) roughness, 4) dimensional accuracy, 5) right alignment of the centre of sphere and taper hole.The most difficult in these areas is the detection that produces qualified sphericity and sphericity.
Under old national standard, joint prosthesis bulb sphericity is smaller or equal to 0.015mm; So processing technology is rough turn, finish turning, polishing; Detection be with make level three sit measuring instrument (repetitive positioning accuracy generally is 2.7um ~ 3.5um), all uses generally speaking manual, so error is very big; And coming into effect new national sector standard from Dec, 2006, joint prosthesis bulb sphericity is smaller or equal to 0.010mm; So processing technology can not repeat, detection method originally is also because of the improve of sphericity precision, and the three-coordinates measuring machine of the magnitude of need using tricks (repetitive positioning accuracy is generally below 1.0um), not only cost an arm and a leg, and mainly be to be used in to select specification product after manufacturing machines, be unwell to and making on-the-spot the use, thereby can't control the product percent of pass in making process, measure the place that other part of revolution class also has its difficulty with three-coordinates measuring machine simultaneously, such as the surveyingpin of three-dimensional is wanted the point on the normal direction feeding measurement ball, this absolute normal direction is very difficult, thereby the old detection method of sphericity can't be fit to the control of production run.
Traditional action method is mainly used in the diameter of measuring major diameter or non-full circle cross section, acts on two dimensional surface; Point on the sphere is beated with respect to the centre of sphere, records though survey high beating in the available action method; But the method that the string on sphere is looked for action with two dimensional surface be difficult to realize that two dimensional surface crosses the centre of sphere, so the action method is difficult to measure the beating of centre of sphere normal direction of any point on the three-dimensional sphere sphere.
Summary of the invention
At the defective that exists in the above-mentioned prior art, technical matters to be solved by this invention provides a kind of high-precision low cost, pick-up unit and the method thereof of sphericity that can online detection.
In order to solve the problems of the technologies described above, the pick-up unit of a kind of sphericity provided by the present invention is characterized in that, comprising:
The clock gauge of one routine is used to measure action;
One chord gauge cup, the internal diameter of rim of a cup is less than the external diameter of tested spheroid, the cup end, set firmly clock gauge, and the sounding rod that makes clock gauge is positioned on the axis in the rim of a cup center of circle, be the axis normal of clock gauge sounding rod in the rim of a cup disk and pass the rim of a cup center of circle, the measuring head of clock gauge is positioned at rim of a cup and can touches tested sphere.
Further, the internal diameter of described chord gauge cup rim of a cup be tested spheroid external diameter 1/5 to 4/5.
Further, described chord gauge cup comprises a glass holder, glass holder is the cylinder type that an end is established the end, glass holder bottom axial centre is provided with conical jack, one glass of body, cup is established the cylinder type at the end as an end, the bottom of described cup body is connected with glass holder cylinder inside spin, the axle center, bottom of cup body is provided with jack, the jack outer rim is established four taper clip tongues that insert jack at the bottom of the glass holders, be threaded onto the rim of a cup of the cup body in the glass holder, the jack and the clip tongue of cup body bottom are coaxial with the jack at the bottom of the glass holder, the sounding rod of clock gauge places glass jack of body bottom and a clip tongue, in the jack at the bottom of the glass holder, the cup body that screws in the glass holder makes four taper clip tongues insert glass holder base cone shape jack, and clamps the sounding rod of clock gauge, make the sounding rod of clock gauge, the measuring head summit can be positioned on the central axis of chord gauge cup, promptly is positioned on glass central axis of body rim of a cup.
In order to solve the problems of the technologies described above, the detection method of a kind of sphericity provided by the present invention is characterized in that, the concrete steps of detection method:
1) measure the summit of ball, measured ball is put into the rim of a cup of chord gauge cup, make the summit of ball run into the measuring head of clock gauge, and the record measured value, be made as h0;
2) be 0 radian with the centre of sphere to the summit of ball, respectively episphere (0 to 90 radian) be taken to few two cross sections to equate radian; Ball is close to rim of a cup rotates, on the circumferential position in each cross section, measure at least four differences respectively, and write down measured value respectively, be made as h11-hxy (x 〉=2, y 〉=4) respectively; Add the measured value that the summit obtains amounting to x * y+1 point;
3) obtain the surface maximal value (according to the measure formula of national standard) of beating, in the survey record of x * y+1 point, get maximal value Hmax and minimum value Hmin, then maximal value: d (H)=Hmax (maximal value)-Hmin (minimum value) beats on the surface of ball;
4) obtain sphericity value, calculate sphericity value by the surface calibrated value of maximal value of beating, promptly according to sphericity value formula: d (R)=kd (H)
Wherein, d (R): sphericity value;
K: the correction factor of the magnitude tracing of measurement instrument to test center of the East China country benchmark;
D (H): the joint ball measurement method is to the maximal value of beating.
Further, described step 2) in, respectively episphere is got three cross sections with 30 radians that equate; Ball is close to rim of a cup rotates, on the circumferential position in each cross section, measure eight differences respectively, and write down measured value respectively, be made as h11-h18, h21-h28, h31-h38 respectively; Add the summit and obtain the measured value of 25 points altogether.
Utilize the pick-up unit and the method thereof of sphericity provided by the invention, at first, on the effective accuracy of measuring with the prior art basically identical; In the prior art three coordinates be on sphere optional point through measuring (X, Y, Z,), with respect to the centre of sphere (Xo, Yo, Zo,) by calculating maximal value and minimum value, degree of accuracy is by the perpendicular positioning precision and the computational accuracy decision of three coordinate machines, the expanded uncertainty of its error of indication calibration result is about 2.5 μ m generally speaking; And the present invention adopts the sphere normal direction directly to measure, and its degree of accuracy is guaranteed by the degree of accuracy of clock gauge that mainly the degree of accuracy of at present general clock gauge is 1 μ m; So can be controlled in the 2 μ m, so precision basically identical of the pick-up unit of the sphericity that the embodiment of the invention provided and method and three coordinate machines through its degree of accuracy of back that calibrates for error.
Secondly,, can in the manufacturing process of product, directly detect, thereby the quality of control product makes things convenient for the manufacturing of product, improves the yield rate of product product owing to use the pick-up unit and the method thereof of sphericity provided by the invention.
Description of drawings
Fig. 1 is the structural representation of the pick-up unit of one embodiment of the invention sphericity;
Fig. 2 is the operation chart of the detection method of embodiment of the invention sphericity;
Fig. 3 is the synoptic diagram of spheroid measuring position in the detection method of embodiment of the invention sphericity;
Fig. 4 is the structural representation of the pick-up unit of another embodiment of the present invention sphericity;
Fig. 5 is the structural representation of the pick-up unit of further embodiment of this invention sphericity.
Embodiment
Below in conjunction with description of drawings embodiments of the invention are described in further detail, but present embodiment is not limited to the present invention, every employing analog structure of the present invention, detection method and similar variation thereof all should be listed protection scope of the present invention in.
Referring to shown in Figure 1, the pick-up unit of a kind of sphericity that the embodiment of the invention provided comprises:
The clock gauge 2 of one routine is used to measure action;
One chord gauge cup 1, comprise a glass holder 11, glass holder is the cylinder type that an end is established the end, glass holder bottom axial centre is provided with conical jack, one glass of body 12, cup is established the cylinder type at the end as an end, the bottom of described cup body is connected with glass holder cylinder inside spin, the axle center, bottom of cup body is provided with jack, the jack outer rim is established four taper clip tongues 121 that insert jack at the bottom of the glass holders, be threaded onto the rim of a cup of the cup body in the glass holder, the jack and the clip tongue of cup body bottom are coaxial with the jack at the bottom of the glass holder, the sounding rod of clock gauge places glass jack of body bottom and a clip tongue, in the jack at the bottom of the glass holder, the cup body that screws in the glass holder makes four taper clip tongues insert glass holder base cone shape jack, and the sounding rod 21 of clamping clock gauge, make the sounding rod 21 of clock gauge, measuring head summit 22 can be positioned on the central axis of chord gauge cup 1, promptly is positioned on glass central axis of body rim of a cup, and makes the measuring head summit 22 of clock gauge be positioned at rim of a cup and can touch tested sphere; The root of four taper clip tongues is provided with groove 122, so that clip tongue can radially clamp; The internal diameter of cup body rim of a cup is about 2/5 to 4/5 of tested spheroid external diameter less than the external diameter of tested spheroid.
Referring to shown in Figure 4, the pick-up unit of the another kind of sphericity that the embodiment of the invention provided comprises:
The clock gauge 2 ' of one routine is used to measure action, and its sounding rod 21 ' is conical;
One chord gauge cup 6, comprise one glass of body 61, cup is established the cylinder type at the end as an end, cup body bottom axial centre is provided with conical jack, at the bottom of one glass 62, a cup end is the disc that a bottom axial centre is provided with jack, and the bottom of described cup body was connected with fixed pin or screw with a glass end, the axle center, bottom of cup body is provided with jack, and the conical jack of cup body bottom is coaxial with the jack at the cup end; The conical sounding rod 21 ' of clock gauge is pressed in the conical jack of glass body bottom, and the sounding rod 21 ' of clock gauge can be positioned on the central axis of chord gauge cup cup body 61, and makes the measuring head summit of clock gauge be positioned at rim of a cup and can touch tested sphere; The internal diameter of cup body rim of a cup is about 2/5 of tested spheroid external diameter less than the external diameter of tested spheroid.
Referring to shown in Figure 5, the pick-up unit of another sphericity that the embodiment of the invention provided comprises:
The clock gauge 2 of one routine ", be used to measure action;
One chord gauge cup 7 is the cylinder type that an end is established the end, and its bottom axial centre is provided with the sounding rod 21 with clock gauge " friction tight jack; The sounding rod 21 of clock gauge " adjust and directly insert the chord gauge cup jack after the length; and with chord gauge cup jack wringing fit D; make the sounding rod 21 of clock gauge " can be positioned on the central axis of chord gauge cup, and make the measuring head summit of clock gauge be positioned at rim of a cup also to touch tested sphere; The internal diameter of cup body rim of a cup is about 3/5 of external diameter less than the external diameter of tested spheroid.
Referring to Fig. 2, shown in Figure 3, the detection method of a kind of sphericity that the embodiment of the invention provided, described sphericity for the sphere of a spheroid take up an official post one point method to the distance of beating; Measured ball 3 is placed on the rim of a cup of chord gauge cup, runs into sphere, read numerical value and record with the measuring head of clock gauge. go to survey by the method for ISO7206-2.The concrete steps of detection method:
1) summit 4 of measuring ball is first check point, and measured ball is put into the rim of a cup of chord gauge cup, makes first measuring head of running into clock gauge of ball, and the record measured value, is made as h0;
2) centre of sphere to the summit of ball is 0 radian, respectively episphere is got with 30 radian ω a that section A, 60 radian ω b are got cross section B, 90 radian ω c get cross section C; Ball is continued to be close to rim of a cup rotate, on the circumferential position of the section A of 30 radians, measure eight differences respectively, and the record measured value, be made as h11-h18; With identical method, on the circumferential position of the cross section of 60 radians B, also measure eight differences respectively, and the record measured value, be made as h21-h28; With identical method, on the circumferential position of the cross section of 90 radians C, also measure eight differences respectively, and the record measured value, be made as h31-h38; All measure eight points on the circumferential position in each cross section, add the summit and obtain the measured value of 25 points altogether;
3) obtain the surface maximal value of beating, survey record by 25 points, standard according to country is come measure formula, in the survey record that amounts to 25 points of h0, h11-h18, h21-h28, h31-h38, get maximal value Hmax and minimum value Hmin, then maximal value: d (H)=Hmax (maximal value)-Hmin (minimum value) beats on the surface of ball;
4) obtain sphericity value, calculate sphericity value by the surface calibrated value of maximal value of beating, promptly according to sphericity value formula: d (R)=kd (H)
Wherein, d (R): sphericity value;
K: the correction factor of the magnitude tracing of measurement instrument to test center of the East China country benchmark;
D (H): the joint ball measurement method is to the maximal value of beating.
Claims (5)
1, a kind of pick-up unit of sphericity is characterized in that, comprising:
The clock gauge of one routine is used to measure action;
One chord gauge cup, the internal diameter of rim of a cup is less than the external diameter of tested spheroid, the cup end, set firmly clock gauge, and the sounding rod that makes clock gauge is positioned on the axis in the rim of a cup center of circle, be the axis normal of clock gauge sounding rod in the rim of a cup disk and pass the rim of a cup center of circle, be positioned at rim of a cup and can touch tested sphere in the measuring head of submeter.
2, the pick-up unit of sphericity according to claim 1 is characterized in that, the internal diameter of described chord gauge cup rim of a cup be tested spheroid external diameter 1/5 to 4/5.
3, the pick-up unit of sphericity according to claim 1, it is characterized in that, described chord gauge cup comprises a glass holder, glass holder is the cylinder type that an end is established the end, glass holder bottom axial centre is provided with conical jack, one glass of body, cup is established the cylinder type at the end as an end, the bottom of described cup body is connected with glass holder cylinder inside spin, the axle center, bottom of cup body is provided with jack, the jack outer rim is established four taper clip tongues that insert jack at the bottom of the glass holders, be threaded onto the rim of a cup of the cup body in the glass holder, the jack and the clip tongue of cup body bottom are coaxial with the jack at the bottom of the glass holder, the sounding rod of clock gauge places glass jack of body bottom and a clip tongue, in the jack at the bottom of the glass holder, the cup body that screws in the glass holder makes four taper clip tongues insert glass holder base cone shape jack, and clamp the sounding rod of clock gauge, make the sounding rod of clock gauge, the measuring head summit can be positioned on the central axis of chord gauge cup, promptly is positioned on glass central axis of body rim of a cup.
4, a kind of detection method of using the sphericity of the described sphericity pick-up unit of claim 1 is characterized in that the concrete steps of detection method:
1) measure the summit of ball, measured ball is put into the rim of a cup of chord gauge cup, make the summit of ball run into the measuring head of clock gauge, and the record measured value, be made as h0;
2) be 0 radian with the centre of sphere to the summit of ball, respectively episphere (0 to 90 radian) be taken to few two cross sections to equate radian; Ball is close to rim of a cup rotates, on the circumferential position in each cross section, measure at least four differences respectively, and write down measured value respectively, be made as h11-hxy (x 〉=2, y 〉=4) respectively; Add the measured value that the summit obtains amounting to x * y+1 point;
3) obtain the surface maximal value of beating, in the survey record of x * y+1 point, get maximal value Hmax and minimum value Hmin, then maximal value: d (H)=Hmax-Hmin beats on the surface of ball;
4) obtain sphericity value, calculate sphericity value by the surface calibrated value of maximal value of beating, promptly according to sphericity value formula: d (R)=kd (H)
Wherein, d (R): sphericity value;
K: the correction factor of the magnitude tracing of measurement instrument to test center of the East China country benchmark;
D (H): the joint ball measurement method is to the maximal value of beating.
5, the detection method of sphericity according to claim 4 is characterized in that, described step 2) in, respectively episphere is got three cross sections with 30 radians that equate; Ball is close to rim of a cup rotates, on the circumferential position in each cross section, measure eight differences respectively, and write down measured value respectively, be made as h11-h18, h21-h28, h31-h38 respectively; Add the summit and obtain the measured value of 25 points altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101184864A CN100494875C (en) | 2006-11-20 | 2006-11-20 | Device for detecting sphericity and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101184864A CN100494875C (en) | 2006-11-20 | 2006-11-20 | Device for detecting sphericity and method |
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| CN1959334A true CN1959334A (en) | 2007-05-09 |
| CN100494875C CN100494875C (en) | 2009-06-03 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997791A (en) * | 2012-11-26 | 2013-03-27 | 无锡市航鹄科技有限公司 | Sphere accuracy detecting device |
| CN102997883A (en) * | 2012-11-18 | 2013-03-27 | 无锡麦铁精密机械制造有限公司 | End distance detection tool of two-end spherical connection rod |
| CN103743312A (en) * | 2012-10-18 | 2014-04-23 | 瑞之路(厦门)眼镜科技有限公司 | Measuring device of arc height of eyeglass |
| CN109916253A (en) * | 2019-03-05 | 2019-06-21 | 重庆零壹空间航天科技有限公司 | Surface measurement method |
| CN109974564A (en) * | 2019-05-06 | 2019-07-05 | 广西玉柴机器股份有限公司 | A kind of journal oil bore edges detection device |
| CN110274535A (en) * | 2019-07-25 | 2019-09-24 | 宁波益明轴承有限公司 | The outer ring detection device of bearing with spherical outside surface |
| CN110702054A (en) * | 2019-11-05 | 2020-01-17 | 湖南航硕体育用品有限公司 | Sphericity detector for plastic ball |
| CN111070024A (en) * | 2018-10-22 | 2020-04-28 | 昆山航晨自动化科技有限公司 | H30 vertical precise spherical surface machining device and operation method |
| CN114739249A (en) * | 2022-04-14 | 2022-07-12 | 福建龙溪轴承(集团)股份有限公司 | Spherical surface measuring device that beats |
-
2006
- 2006-11-20 CN CNB2006101184864A patent/CN100494875C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743312A (en) * | 2012-10-18 | 2014-04-23 | 瑞之路(厦门)眼镜科技有限公司 | Measuring device of arc height of eyeglass |
| CN102997883A (en) * | 2012-11-18 | 2013-03-27 | 无锡麦铁精密机械制造有限公司 | End distance detection tool of two-end spherical connection rod |
| CN102997791A (en) * | 2012-11-26 | 2013-03-27 | 无锡市航鹄科技有限公司 | Sphere accuracy detecting device |
| CN111070024A (en) * | 2018-10-22 | 2020-04-28 | 昆山航晨自动化科技有限公司 | H30 vertical precise spherical surface machining device and operation method |
| CN109916253A (en) * | 2019-03-05 | 2019-06-21 | 重庆零壹空间航天科技有限公司 | Surface measurement method |
| CN109974564A (en) * | 2019-05-06 | 2019-07-05 | 广西玉柴机器股份有限公司 | A kind of journal oil bore edges detection device |
| CN109974564B (en) * | 2019-05-06 | 2024-05-03 | 广西玉柴机器股份有限公司 | Journal oil hole edge detection device |
| CN110274535A (en) * | 2019-07-25 | 2019-09-24 | 宁波益明轴承有限公司 | The outer ring detection device of bearing with spherical outside surface |
| CN110274535B (en) * | 2019-07-25 | 2024-02-27 | 宁波益明轴承有限公司 | Outer ring detection device of outer spherical bearing |
| CN110702054A (en) * | 2019-11-05 | 2020-01-17 | 湖南航硕体育用品有限公司 | Sphericity detector for plastic ball |
| CN110702054B (en) * | 2019-11-05 | 2021-07-16 | 湖南航硕体育用品有限公司 | Sphericity detector for plastic ball |
| CN114739249A (en) * | 2022-04-14 | 2022-07-12 | 福建龙溪轴承(集团)股份有限公司 | Spherical surface measuring device that beats |
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| Publication number | Publication date |
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| CN100494875C (en) | 2009-06-03 |
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Granted publication date: 20090603 Termination date: 20131120 |