CN202119407U - Double-ball involute templet suitable for calibrating gear measuring center - Google Patents
Double-ball involute templet suitable for calibrating gear measuring center Download PDFInfo
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- CN202119407U CN202119407U CN2011200838650U CN201120083865U CN202119407U CN 202119407 U CN202119407 U CN 202119407U CN 2011200838650 U CN2011200838650 U CN 2011200838650U CN 201120083865 U CN201120083865 U CN 201120083865U CN 202119407 U CN202119407 U CN 202119407U
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- involute
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Abstract
The utility model relates to a double-ball involute templet suitable for calibrating a gear measuring center, and used for calibrating a gear measuring centre. The double-ball involute templet comprises two high accuracy balls, a pedestal and a connection portion of the pedestal and the balls, and is characterized in that the balls are high accuracy ceramic balls, and have the characteristics of high hardness and low heat expansion, ensuring the consistency of sphericility under temperature change; the pedestal is made of a high hardness low heat expansion coefficient material, ensuring the non-deformity of the pedestal under temperature change; and the connection portion of the balls and the pedestal is mainly composed of connecting rods and springs, therefore the structure is simple and stable, ensuring the consistency of the templet accuracy under different temperatures. Since arcs on the high accuracy balls are used to replace involutes, the gear measuring centre is calibrated with high accuracy and the magnitude transmission of the involutes is realized. The double-ball involute templet is simple in structure, convenient in installation, high in accuracy, low in cost, traceable and convenient for saving.
Description
Technical field
The utility model relates to a kind of two ball involute models that are suitable for calibrating gear measuring center, belongs to the benchmark involute model, is used for the high-precision calibration that the gear measuring center involute profile is measured.
Background technology
Involute model is the basis that guarantees that the gear value is unified and transmit.Because involute shape is complicated, processing difficulties, the most accurate involute model still has 0.3 micron mismachining tolerance and can't trace to the source in the world at present; Particularly, the involute urve basic pattern also needs special ultraprecise instrument to measure, and China's the highest legal measurement unit does not also have this basic pattern surveying instrument, so involute urve is not traced to the source in China.For many years, people are exploring the possibility of removing to replace involute model with the combination of simple body always.Simple body and combination thereof are measured simply, can realize high-acruracy survey.The software correction technique of combining with digital control instrument just can be realized the transmission of quantity value of complex object.For involute model, two-dimensional template has abroad been proposed, the cylinder model, the involute model of non-involute shapes such as two ball models, wherein two-dimensional template and cylinder model exist easy no to scale of measurement result and installation accuracy to be difficult to shortcomings such as assurance.
Summary of the invention
The purpose of the utility model is: overcome the shortcoming that existing involute model precision is not enough and can't trace to the source, propose a kind of two ball involute models that are suitable for calibrating gear measuring center.
To achieve these goals; The technical scheme that the utility model is taked is as shown in Figure 1; Comprise that one is detected ball 1, centering ball 2, pedestal 3, two connecting rods 4 and two springs 5; It is characterized in that: the center and peripheral of pedestal 3 has two 90 ° of conical bores, and 90 ° of interior through holes of conical bore communicate with the kidney groove of pedestal 3 bottoms; Detecting ball 1 is equal-sized high-precision sphere with centering ball 2; The centering ball 2 that is used to detect the installation deviation of the utility model on gear measuring center is installed in the conical bore at center of pedestal 3; The detection ball 1 that is used for substituting involute profile is installed in the conical bore at edge of pedestal 3.Internal thread hole is arranged at the bottom of detecting ball 1 and centering ball 2; Internal thread hole links to each other with connecting rod 4; The other end of connecting rod 4 is positioned at the kidney groove of pedestal 3 bottoms, and an end of spring 5 is connected the lower end of connecting rod 4, and the other end of spring 5 withstands on pedestal 3 planes of the upper end of kidney groove; Produce the downward pulling force of ball thereby use nuts and washers to make spring be installed in compressive state in the lower end of connecting rod 4, guarantee that high-precision sphere stably is installed on the pedestal.
Described detection ball 1 calculates according to following formula with the radius of centering ball 2:
Wherein: r
b: the base radius of the gear that two ball involute models are simulated;
r
c: two ball involute models detect the radius of ball 1;
Z: the number of teeth of the gear that two ball involute models are simulated;
Described centering ball 2 and the centre of sphere distance that detects between the ball 1 are calculated based on following formula:
C＝0.994r
b+0.038(r
c+r
p)
Wherein: C: the distance between two spheroid centre ofs sphere
r
b: the base radius of the gear that two ball involute models are simulated
r
c: two ball involute models detect the radius of ball
r
p: the radius of gauge head on the gear measuring center
Described detection ball 1 is pottery with the material of centering ball 2.
Described pedestal 3 is oblate cylindricality, and its height is 0.4 with the ratio of radius.
The material of described pedestal 3 is a grouan.
Described spring 5 is a cylindroid helical-coil compression spring.
The centre of sphere between centering ball 1 and the detection ball 2 is apart from the international standard that can be traceable to length.Adjust the centering ball and detect the distance between the ball, the size that detects the radius of a ball and the size of pedestal, can obtain two ball involute models of various sizes.
Adopt following step when utilizing the utility model calibration gear measuring center:
1) two ball involute models is installed in the turntable central authorities of gear measuring center, the model center is overlapped, assurance pair ball model horizontal positioned with the rotation center of gear measuring center;
2) use gear measuring center gauge head scanning centering ball, obtain the two alignment errors of ball involute model on gear measuring center;
3) program of the parameter setting gear measuring center of the two ball involute models of basis is measured;
4) through software measurement result analysis is obtained calibration result;
The utility model has the advantages that: simple in structure, cost is low, owing to adopt the circular arc on the high-precision sphere to replace involute urve so calibration accuracy height, can trace to the source, and convenient the preservation.
Description of drawings
Fig. 1 is the structure composition diagram of the utility model;
Fig. 2 is the MECH plot of pedestal in the utility model;
Fig. 3 is the cut-open view of high-precision sphere in the utility model;
Fig. 4 is the theoretical measurement result of the utility model on gear measuring center;
1, detects ball, 2, the centering ball, 3, pedestal, 4, connecting rod, 5, spring.
Embodiment
In conjunction with Fig. 1 the utility model is further described:
A kind of two ball involute models that are suitable for calibrating gear measuring center are made up of these three parts in two high-precision spheres, pedestal and coupling parts.Two balls stably are installed on the oblate cylindrical base; One of them ball is installed in the pedestal center through the connected mode of connecting rod and spring assembly, is used to detect the two installation deviation of ball model on gear measuring center, is called centering ball 2; The another one ball is installed in the edge of pedestal through the connected mode of connecting rod and spring assembly; Be used for substituting involute profile, be called and detect ball 1, centering ball 2 is all selected the identical high-precision sphere of size with detection ball 1.
The coupling part that has also shown the utility model among Fig. 1 links together connecting rod 4 and ball through screw thread, and connecting rod 4 places in the hole of pedestal 3, and compression spring 5 is enclosed within the bottom of connecting rod, is installed in the deep trouth of pedestal 3 bottoms.Produce the downward pulling force of high-precise ball thereby use nuts and washers to make spring 5 be installed in compressive state, high-precise ball stably is installed on the pedestal.In this structure, because the existence of spring tension, even, can not exert an influence with contacting of pedestal 3, so the position of high-precise ball can not change to high-precise ball because the variation of temperature or environment is expanded the junction of high-precise ball and connecting rod 4 yet.
Pedestal as shown in Figure 2 is a flattened cylindrical shape, and the material of pedestal is selected the grouan of low thermal expansion factor.Upper surface has two 90 ° of conical bores, is used to carry high-precision sphere, and lower surface has gone out out a kidney groove corresponding with two holes; Be used for mounting spring 5, between kidney groove and the conical bore through hole arranged, be used for installing connecting rods; There is conical bore the through hole both sides, are used for the fixing of connecting rod 4.Distance between two conical bore centers of pedestal upper surface is definite by following formula,
C＝0.994r
b+0.038(r
c+r
p)
C: the distance between two spheroid centre ofs sphere
r
b: the base radius of the gear that two ball involute models are simulated
r
c: two ball involute models detect the radius of ball
r
p: the radius of gauge head on the gear measuring center
High-precision sphere cut-open view as shown in Figure 3, the material of high-precision sphere is selected pottery.An internal thread hole is arranged on the high-precision sphere, be installed in pedestal after being used for being connected with connecting rod.The radius of high-precision sphere is selected according to following formula,
r
b: the base radius of the gear that two ball involute models are simulated
r
c: two ball involute models detect the radius of ball
Z: the number of teeth of the gear that two ball involute models are simulated
Step when introducing the utility model calibration gear measuring center below:
1) two ball involute models is installed in the turntable central authorities of gear measuring center; The model center is overlapped with the pivot of gear measuring center; Use the pedestal upper surface edge of this pair of gauge head scanning ball involute model of gear measuring center; Adjust the two horizontal levels of ball involute model on gear measuring center based on measurement result, repeat upper surface on gear measuring center the maintenance level of aforesaid operations up to two ball models;
2) after confirming two ball involute model levels, use the great circle on the gear measuring center gauge head scanning centering ball, note measurement result, use special software to come the analysis to measure result can obtain the two alignment errors of ball involute model on gear measuring center;
3) program of parameter (modulus, the number of teeth) the setting gear measuring center of the two ball involute models of basis is carried out the involute profile measurement, preserves measurement result.
4) alignment error that obtains in the parameter (modulus, the number of teeth) of the two ball involute models of basis and the step 2; Use special software to obtain theoretical two ball involute model measurement results; As shown in Figure 4; Wherein horizontal ordinate is represented the anglec of rotation of two ball involute models, and ordinate is the deviate between circular arc and the involute urve, and its theoretical measurement result shows as a camel-back curve;
5) use special software to call in the measurement result in the step 3, more theoretical measurement result and actual measured results get calibration result to the end.Calibration result comprises four kinds of results such as instrument total departure, gauge head positioning error, gain error and hysteresis error.
Claims (5)
1. two ball involute models that are suitable for calibrating gear measuring center; Comprise that one is detected ball (1), centering ball (2), a pedestal (3), two connecting rods (4) and two springs (5); It is characterized in that: the center and peripheral of pedestal (3) has two 90 ° of conical bores, communicates through the kidney groove of through hole with pedestal (3) bottom in 90 ° of conical bores; Detection ball (1) and centering ball (2) are equal-sized high-precision sphere; The centering ball (2) that is used to detect the installation deviation of the utility model on gear measuring center is installed in the conical bore at center of pedestal (3); The detection ball (1) that is used for substituting involute profile is installed in the conical bore at edge of pedestal (3); Internal thread hole is arranged at the bottom of detecting ball (1) and centering ball (2); Internal thread hole links to each other with connecting rod (4); The other end of connecting rod (4) is positioned at the kidney groove of pedestal (3) bottom, and an end of spring (5) is connected the lower end of connecting rod (4), and the other end of spring (5) withstands on pedestal (3) plane of the upper end of kidney groove; At connecting rod (4) thus the lower end use nuts and washers to make spring be installed in compressive state to produce the downward pulling force of ball, guarantee that high-precision sphere stably is installed on the pedestal;
Described detection ball (1) calculates according to following formula with the radius of centering ball (2):
Wherein: r
b: the base radius of the gear that two ball involute models are simulated;
r
c: two ball involute models detect the radius of ball 1;
Z: the number of teeth of the gear that two ball involute models are simulated;
Described centering ball 2 and the centre of sphere distance that detects between the ball 1 are calculated based on following formula:
C＝0.994r
b+0.038(r
c+r
p)
Wherein: C: the distance between two spheroid centre ofs sphere
r
b: the base radius of the gear that two ball involute models are simulated
r
c: two ball involute models detect the radius of ball
r
p: the radius of gauge head on the gear measuring center.
2. a kind of two ball involute models that are suitable for calibrating gear measuring center according to claim 1 is characterized in that: described detection ball (1) is pottery with the material of centering ball (2).
3. a kind of two ball involute models that are suitable for calibrating gear measuring center according to claim 1 is characterized in that: described pedestal (3) is oblate cylindricality, and its height is 0.4 with the ratio of radius.
4. a kind of two ball involute models that are suitable for calibrating gear measuring center according to claim 1, it is characterized in that: the material of described pedestal (3) is a grouan.
5. a kind of two ball involute models that are suitable for calibrating gear measuring center according to claim 1, it is characterized in that: described spring (5) is a cylindroid helical-coil compression spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200838650U CN202119407U (en) | 2011-03-25 | 2011-03-25 | Double-ball involute templet suitable for calibrating gear measuring center |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200838650U CN202119407U (en) | 2011-03-25 | 2011-03-25 | Double-ball involute templet suitable for calibrating gear measuring center |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202119407U true CN202119407U (en) | 2012-01-18 |
Family
ID=45460464
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200838650U Expired - Lifetime CN202119407U (en) | 2011-03-25 | 2011-03-25 | Double-ball involute templet suitable for calibrating gear measuring center |
Country Status (1)
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| CN (1) | CN202119407U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706306A (en) * | 2012-03-01 | 2012-10-03 | 北京工业大学 | Involute gear waviness sample plate |
| CN102927939A (en) * | 2012-10-16 | 2013-02-13 | 重庆工具厂有限责任公司 | Method for calibrating mutual alignment of R shaft, Z shaft and T shaft of gear measuring center |
| CN103162959A (en) * | 2013-02-22 | 2013-06-19 | 北京工业大学 | Multifunctional gear sample plate |
| CN109540060A (en) * | 2018-12-26 | 2019-03-29 | 北京工业大学 | A kind of large scale involute model design method suitable for evaluating involute checker device |
| CN109682285A (en) * | 2018-12-24 | 2019-04-26 | 重庆市计量质量检测研究院 | More ball free-assembling tooth pitch templates and adjusting process |
| CN111521086A (en) * | 2020-06-05 | 2020-08-11 | 金齿传动科技(大连)有限公司 | Involute template of gear with three base circle parameters |
-
2011
- 2011-03-25 CN CN2011200838650U patent/CN202119407U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706306A (en) * | 2012-03-01 | 2012-10-03 | 北京工业大学 | Involute gear waviness sample plate |
| CN102706306B (en) * | 2012-03-01 | 2014-08-13 | 北京工业大学 | Involute gear waviness sample plate |
| CN102927939A (en) * | 2012-10-16 | 2013-02-13 | 重庆工具厂有限责任公司 | Method for calibrating mutual alignment of R shaft, Z shaft and T shaft of gear measuring center |
| CN102927939B (en) * | 2012-10-16 | 2015-12-09 | 重庆工具厂有限责任公司 | The calibration method of gear measuring center R axle Z axis and T axle mutual alignment |
| CN103162959A (en) * | 2013-02-22 | 2013-06-19 | 北京工业大学 | Multifunctional gear sample plate |
| CN103162959B (en) * | 2013-02-22 | 2015-10-28 | 北京工业大学 | Multifunctional gear sample plate |
| CN109682285A (en) * | 2018-12-24 | 2019-04-26 | 重庆市计量质量检测研究院 | More ball free-assembling tooth pitch templates and adjusting process |
| CN109682285B (en) * | 2018-12-24 | 2020-07-24 | 重庆市计量质量检测研究院 | Multi-ball freely-assembled tooth pitch sample plate and adjusting method |
| CN109540060A (en) * | 2018-12-26 | 2019-03-29 | 北京工业大学 | A kind of large scale involute model design method suitable for evaluating involute checker device |
| CN111521086A (en) * | 2020-06-05 | 2020-08-11 | 金齿传动科技(大连)有限公司 | Involute template of gear with three base circle parameters |
| CN111521086B (en) * | 2020-06-05 | 2021-10-01 | 金齿传动科技(大连)有限公司 | Involute template of gear with three base circle parameters |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120118 |