CN102278933A - Measuring method and measuring device for stick span length of cylindrical straight tooth involute spline ring gauge - Google Patents
Measuring method and measuring device for stick span length of cylindrical straight tooth involute spline ring gauge Download PDFInfo
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- CN102278933A CN102278933A CN 201110184739 CN201110184739A CN102278933A CN 102278933 A CN102278933 A CN 102278933A CN 201110184739 CN201110184739 CN 201110184739 CN 201110184739 A CN201110184739 A CN 201110184739A CN 102278933 A CN102278933 A CN 102278933A
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Abstract
The invention relates to a measuring method and measuring device for the stick span length of a cylindrical straight tooth involute spline ring gauge. The measuring method provided by the invention comprises the following steps: (1) oppositely installing two symmetric measuring hooks on a measuring base and tailstock of a horizontal length measuring instrument and installing measuring heads on the hook tips of the measuring hooks, wherein the measuring heads comprise a knife edge measuring head and a plane measuring head and the knife edge measuring head and a spline tooth slot of an internal spline are mutually perpendicular; (2) carrying out zero calibration, namely adjusting the two measuring heads to be in parallel; fixing a combined measuring block on an operating platform of the horizontal length measuring instrument by utilizing a measuring block clamp; adjusting the operating platform and enabling the measuring claw operating surface on the measuring block and the knife edge surface of the knife edge measuring head to be parallel; setting the instrument to be zero; (3) taking down the measuring block and installing the measured spline ring gauge, wherein a measuring stick is installed in the tooth slot of the measured spline ring gauge; and (4) enabling the knife edge measuring head to be in contact with the measuring stick; adjusting the operating platform; and reading an indicating value of the instrument and adding the actual value of the measuring block for zero calibration to obtain the stick span length of the measured spline ring gauge.
Description
Technical field
The present invention relates to a kind of measuring method of striding excellent distance of spline ring gauge, relate in particular to measuring method and measurement mechanism that cylindrical straight gear involute spline ring gauge is striden excellent distance.
Background technology
Spline is to interconnect by equidistant distribution and the identical key tooth of the number of teeth on the inside and outside periphery on two driving parts, transmits the coaxial even part of moment of torsion or motion.And involute spline is the spline with involute profile, is very important coupling component in the physical construction.And involute spline (ring, plug) rule are the main production line standard gauges that are used for the comprehensive test involute spline.
The production of involute spline gauge is a machining class industry that derives from along with developing rapidly of auto industry, and its production technology is comparatively perfect at home and abroad.The gauge of production firm is need be by using after metrological service's calibration.Along with the production firm of Shanghai and surrounding area is on the increase, cylindrical straight gear (even number) involute spline (ring, plug) rule quantity is in rising trend, and is also more and more for the measurement requirement of spline gauge.
According to GB/T 5106-2006 cylindrical straight gear involute spline gauge standard, an important comprehensive technical indexes judging the cylindrical straight gear involute spline gauge is M value (striding the rod distance).Accompanying drawing 1 is depicted as the signal of involute spline feeler gauge M value, and accompanying drawing 2 is depicted as the signal of involute spline ring gauge M value.
The rod of striding for spline plug gauge has existing high precision horizontal length measuring machine and three pins to measure apart from the M value at present, measures needs to satisfy.But for spline ring gauge, owing to be subjected to the influence of involute profile, can not directly adopt this method to measure, measuring method still adopts traditional gauge block combination filling or radiographic measurement technology to finish at present.Gauge block combination filling efficiency of measurement is lower, the gauge block loss is big, and the measurement result of radiographic measurement technology can only reflect the situation of upper surface, and can not reflect the actual state of gauge comprehensively.
Present various gear measuring centers also have the M value Survey Software of corresponding spline gauge, but its appraisal procedure is subjected to the influence of each side such as gauge head, profile of tooth, and its measuring accuracy can't satisfy the requirement of spline gauge.
Summary of the invention
Technical matters to be solved by this invention provides measuring method and the measurement mechanism that a kind of cylindrical straight gear involute spline ring gauge is striden excellent distance, solves the defective that present spline ring gauge strides that excellent distance measurement method efficient is low, loss is big, can not reflect the actual state of gauge comprehensively.
Technical scheme
A kind of cylindrical straight gear involute spline ring gauge is striden the measuring method of excellent distance, it is characterized in that comprising the steps:
(1) the survey hook of two symmetries is installed in opposite directions on the measuring seat of horizontal length measuring machine and tailstock, on the vertically most advanced and sophisticated horizontal measurement headstock of described survey hook, install and measure gauge head, described measurement gauge head comprises the edge of a knife gauge head of front end and the plane gauge head of rear end, edge of a knife gauge head is in the face of the inside dimension measuring position, and the female spline key tooth teeth groove of the corresponding described spline ring gauge of described edge of a knife gauge head is also vertical mutually;
(2) carry out zero adjustment, promptly adjust the installation site of described survey hook, use outside dimension to measure dynamometry earlier and adjust two plane parallel of measuring gauge head, to make up near the gauge block of striding rod distance value of tested spline ring gauge then, the value of record gauge block, the gauge block clamping of combination is pressed from both sides at the special-purpose gauge block of horizontal length measuring machine, be fixed on the horizontal length measuring machine worktable, make edge of a knife gauge head and the gauge block folder measuring jaw plane contact of measuring gauge head with ergometry, and adjustment horizontal length measuring machine worktable, make the measuring jaw workplace parallel, then with instrument display zero setting with the edge of a knife gauge head of measuring gauge head;
(3) behind the zero adjustment, gauge block is taken off, tested spline ring gauge is installed in the gauge block position, the measurement rod that chooses is installed in the tested spline ring gauge teeth groove, is fixed on the worktable of horizontal length measuring machine;
(4) edge of a knife gauge head of measuring gauge head is contacted with the measurement in being fixed on the corresponding teeth groove of tested spline ring gauge is excellent, adjust the horizontal length measuring machine worktable, make the instrument indicating value for minimum, read the instrument indicating value, add the actual value of above-mentioned zero adjustment with gauge block, what can obtain tested spline ring gauge strides rod apart from the M value.
The depth of parallelism of the edge of a knife gauge head of mounted measurement gauge head and plane gauge head in the described step 1≤0.3 μ m, the flatness≤0.1 μ m of the plane gauge head of measurement gauge head.
After the method for adjusting the depth of parallelism of described measurement gauge head comprises the steps: to be installed in described measurement gauge head on the survey hook, at first be installed in outerplanar parallel grinding block clamping in two combinations on the worktable of horizontal length measuring machine well, it is substantially parallel with the measurement gauge head to adjust the grinding block plane, and plane gauge head or the edge of a knife gauge head of measuring gauge head are touched with certain ergometry and grinding block, adjust the worktable of horizontal length measuring machine then, the grinding block plane is fully contacted with plane gauge head or edge of a knife gauge head, meanwhile lock worktable, and on grinding block, coat abrasive pastes, reconditioning is carried out on plane to plane gauge head or edge of a knife gauge head, reaches the requirement of the depth of parallelism.
A kind ofly use the measurement mechanism that above-mentioned cylindrical straight gear involute spline ring gauge is striden the measuring method of excellent distance, it is characterized in that: be included in the survey hook that two symmetries are installed on the measuring seat of horizontal length measuring machine and the tailstock in opposite directions, on the vertically most advanced and sophisticated horizontal measurement headstock of described survey hook, install and measure gauge head, described measurement gauge head comprises the edge of a knife gauge head of front end and the plane gauge head of rear end, edge of a knife gauge head is in the face of the inside dimension measuring position, and the female spline key tooth teeth groove of the corresponding described spline ring gauge of described edge of a knife gauge head is also vertical mutually.
The front end edge of a knife gauge head of described measurement gauge head is for carving type, and carving type termination central authorities is a long and narrow plane, and width is at 0.3～0.5mm.
On the worktable of horizontal length measuring machine, be provided with the ring gauge clamp system and be used for fixing tested spline ring gauge of installation and the measurement rod that chooses, described ring gauge clamp system comprises upper end clamping element and lower end clamping element, described upper end clamping element comprises the C type folder that covers on tested spline ring gauge ring and passes the gib screw that C type folder is used to withstand tested spline ring gauge upper end, described lower end clamping element comprises the pedestal on the worktable that is arranged on horizontal length measuring machine, be installed on the pedestal can forward and reverse rotation screw mandrel, on the screw mandrel of screw mandrel that is rotated in the forward and reverse rotation, be respectively arranged with the fixed strip that the upper end that moves horizontally with the screw mandrel rotation extends lower end in the tested spline ring gauge ring.
Beneficial effect
Measuring method and measurement mechanism that cylindrical straight gear involute spline ring gauge of the present invention is striden excellent distance pass through to adopt custom-designed survey hook and measure gauge head, directly extend in the tested spline ring gauge female spline key teeth groove and measure, measuring method than present employing plug combination gauge block, not only speed up, efficient improves, and measurement result is more accurate.
Description of drawings
Fig. 1 strides rod apart from synoptic diagram for cylindrical straight gear involute spline feeler gauge;
Fig. 2 strides rod apart from synoptic diagram for cylindrical straight gear involute spline ring gauge;
Fig. 3 is a measurement mechanism synoptic diagram of the present invention.
Fig. 4 is for measuring the gauge head synoptic diagram among the present invention.
Wherein: 1-surveys hook, the 2-spline ring gauge, and 3-measures gauge head, and 4-edge of a knife gauge head, 5-plane gauge head, 6-are measured rod, 7-ring gauge clamp system, 8-C type folder, the 9-gib screw, the 10-pedestal, the 11-screw mandrel, the 12-fixed strip, 13-surveys hook assembling place.
Embodiment
Below in conjunction with specific embodiments and the drawings, further set forth the present invention.
The present invention aims to provide a kind of cylindrical straight gear (even number) involute spline ring gauge M value measurement method and measurement mechanism of being adapted to, to solve cylindrical straight gear (even number) involute spline ring gauge M value problems of measurement.
According to GB/T 5106-2006 cylindrical straight gear involute spline gauge standard, the measuring method of research cylindrical straight gear involute spline ring gauge M value, on the basis of existing high precision horizontal length measuring machine, develop novel survey hook 1 that is used for the inside dimension measurement and measurement gauge head 2, the new method that gauge head is calibrated in adopting (depth of parallelism calibration by planar ends outside measuring reaches the inboard survey hook and the bearing calibration of the depth of parallelism of measuring gauge head measurement sword face).And use gauge block as measuring basis, adopt the measuring method of similar cylindrical straight gear involute spline feeler gauge M value to compare measurement, solve in the traditional measurement poor efficiency or only reflect relevant issues such as upper surface situation, to realize the measurement of high-precision quick measurement involute spline ring gauge M value.
Spline ring gauge M value measuring mechanism of the present invention is on the basis of high precision horizontal length measuring machine, is made up of the novel survey hook 1 and the measurement gauge head 3 of design, has also designed the ring gauge clamp system 7 of involute spline ring gauge in addition.
Measure involute spline ring gauge M value for being applicable to, measure the assembly that gauge head 3 is designed to plane gauge head 5 and edge of a knife gauge head 4, improve the flatness≤0.1 μ m on edge of a knife gauge head 4 planes that guarantee the inboard plane gauge head 5 and the outside by design and processing technology, guarantee to measure the depth of parallelism≤0.3 μ m of gauge head 3 both sides simultaneously.Being about to two measurement gauge heads 3 is contained in respectively on the two survey hooks 1, and will survey hook 1 respectively the special use by horizontal length measuring machine survey the cap adapter sleeve and be installed on horizontal length measuring machine two measuring seats and the tailstock, utilize high precision horizontal length measuring machine benchmark to survey the right alignment of seat less than≤0.1 μ m, plane parallel degree≤0.1 μ m, be installed in two inside and outside parallel plane grinding block clampings on the worktable of horizontal length measuring machine well by the good combination of unit clamp clamping, and inboard plane gauge head 5 is contacted with grinding block with the dynamometry of 2.0N, adjust worktable, the grinding block plane is fully contacted with the plane of plane gauge head 5, meanwhile lock worktable, and on grinding block, coat abrasive pastes, last reconditioning is carried out on gauge head 5 planes in plane, also adopt similar method that edge of a knife gauge head 4 knife-edge plane are carried out reconditioning, to satisfy the depth of parallelism≤0.3 μ m of two edge of a knife gauge heads 4 and two plane gauge heads 5, the collimation requirement of measuring gauge head 3 two sides flatnesses≤0.1 μ m.This measurement gauge head 3 be designed to domestic and international initiative.
Measuring method is after installing above-mentioned measurement mechanism, in the measuring process, at first carries out zero adjustment, promptly makes two plane contact with the ergometry of 2.0N, adjusts the installation site of surveying hook, makes that two edge of a knife gauge heads are parallel; And will be near the gauge block combination of tested spline ring gauge M value size, the value of record gauge block, be clipped on the special-purpose gauge block folder combined amount is packaged, be fixed on the horizontal length measuring machine worktable, use the ergometry of 2.0N, make edge of a knife gauge head 4 contact with gauge block folder measuring jaw, and the adjustment worktable (swings and looks for minimum value, vertical oscillation is also looked for minimum value) make measuring jaw parallel with edge of a knife gauge head 4, with realization edge of a knife gauge head 4 on the survey hook 1 is calibrated, and with instrument display zero setting.Behind the zero adjustment, spline ring gauge 2 and the measurement rod 6 that chooses are installed on the ring gauge clamp system 7 that designs, and be fixed on the worktable of horizontal length measuring machine, attention is positioned at the corresponding line of centres of measuring rod 6 in tested spline ring gauge 2 teeth groove on the measurement axis as far as possible, measure spline ring gauge M value with the edge of a knife gauge head 4 that calibration is good, use the ergometry of 2.0N, measurement rod 6 in making edge of a knife gauge head 4 and being fixed on spline ring gauge 2 corresponding teeth groove contacts and is vertical mutually, adjust the vertical oscillation of worktable, read the instrument indicating value
, add the actual value of calibration with gauge block, can obtain tested spline ring gauge M value.
Be the measurement mechanism synoptic diagram as shown in Figure 3, comprised survey hook 1, survey hook 1 will be surveyed hook 1 by survey hook assembling place 13 and be installed on horizontal length measuring machine measuring head base and the tailstock, also comprise and measure gauge head 3 and ring gauge clamp system 7, above-mentioned ring gauge clamp system 7 comprises upper end clamping element and lower end clamping element, described upper end clamping element comprises the C type folder 8 that covers on tested spline ring gauge 2 rings and passes C type folder 8 and is used to withstand the gib screw 9 of tested spline ring gauge 2 upper ends, described lower end clamping element comprises the pedestal 10 on the worktable that is arranged on horizontal length measuring machine, be installed on the pedestal 10 can forward and reverse rotation screw mandrel 11, on the screw mandrel of screw mandrel that is rotated in the forward and reverse rotation, be respectively arranged with the fixed strip 12 that the upper end that moves horizontally with the screw mandrel rotation extends lower end in the tested spline ring gauge ring.
According to cylindrical straight gear involute spline ring gauge M value set forth above (striding the rod distance) measuring method and measurement mechanism, the measurement gauge head 3 of the novel knife-edge plane combination that is used for the inside dimension measurement of research; And the new method of gauge head calibration in adopting, show through evaluation of uncertainty in measurement result and measurement result comparison, can realize that measurement range is the measurement quick and precisely of striding excellent distance of 15mm～30mm; And the uncertainty of measurement of measuring cylindrical straight gear involute spline ring gauge M value reaches 0.9 μ m.
Claims (6)
1. a cylindrical straight gear involute spline ring gauge is striden the measuring method of excellent distance, it is characterized in that comprising the steps:
(1) the survey hook of two symmetries is installed in opposite directions on the measuring seat of horizontal length measuring machine and tailstock, on the vertically most advanced and sophisticated horizontal measurement headstock of described survey hook, install and measure gauge head, described measurement gauge head comprises the edge of a knife gauge head of front end and the plane gauge head of rear end, edge of a knife gauge head is in the face of the inside dimension measuring position, and the female spline key tooth teeth groove of the corresponding described spline ring gauge of described edge of a knife gauge head is also vertical mutually;
(2) carry out zero adjustment, promptly adjust the installation site of described survey hook, use outside dimension to measure dynamometry earlier and adjust two plane parallel of measuring gauge head, to make up near the gauge block of striding rod distance value of tested spline ring gauge then, the value of record gauge block, the gauge block clamping of combination is pressed from both sides at the special-purpose gauge block of horizontal length measuring machine, be fixed on the horizontal length measuring machine worktable, make edge of a knife gauge head and the gauge block folder measuring jaw plane contact of measuring gauge head with ergometry, and adjustment horizontal length measuring machine worktable, make the measuring jaw workplace parallel, then with instrument display zero setting with the edge of a knife gauge head of measuring gauge head;
(3) behind the zero adjustment, gauge block is taken off, tested spline ring gauge is installed in the gauge block position, the measurement rod that chooses is installed in the tested spline ring gauge teeth groove, is fixed on the worktable of horizontal length measuring machine;
(4) edge of a knife gauge head of measuring gauge head is contacted with the measurement in being fixed on the corresponding teeth groove of tested spline ring gauge is excellent, adjust the horizontal length measuring machine worktable, make the instrument indicating value, read the instrument indicating value for minimum
, add the actual value of above-mentioned zero adjustment with gauge block, what can obtain tested spline ring gauge strides rod apart from the M value.
2. cylindrical straight gear involute spline ring gauge as claimed in claim 1 is striden the measuring method of excellent distance, it is characterized in that: the depth of parallelism of the edge of a knife gauge head of mounted measurement gauge head and plane gauge head in the described step 1≤0.3 μ m, the flatness≤0.1 μ m of the plane gauge head of measurement gauge head.
3. cylindrical straight gear involute spline ring gauge as claimed in claim 2 is striden the measuring method of excellent distance, it is characterized in that: after the method for adjusting the depth of parallelism of described measurement gauge head comprises the steps: to be installed in described measurement gauge head on the survey hook, at first be installed in outerplanar parallel grinding block clamping in two combinations on the worktable of horizontal length measuring machine well, it is substantially parallel with the measurement gauge head to adjust the grinding block plane, and plane gauge head or the edge of a knife gauge head of measuring gauge head are touched with certain ergometry and grinding block, adjust the worktable of horizontal length measuring machine then, the grinding block plane is fully contacted with plane gauge head or edge of a knife gauge head, meanwhile lock worktable, and on grinding block, coat abrasive pastes, reconditioning is carried out on plane to plane gauge head or edge of a knife gauge head, reaches the requirement of the depth of parallelism.
4. use the measurement mechanism that cylindrical straight gear involute spline ring gauge as claimed in claim 1 is striden the measuring method of excellent distance for one kind, it is characterized in that: be included in the survey hook that two symmetries are installed on the measuring seat of horizontal length measuring machine and the tailstock in opposite directions, on the vertically most advanced and sophisticated horizontal measurement headstock of described survey hook, install and measure gauge head, described measurement gauge head comprises the edge of a knife gauge head of front end and the plane gauge head of rear end, edge of a knife gauge head is in the face of the inside dimension measuring position, and the female spline key tooth teeth groove of the corresponding described spline ring gauge of described edge of a knife gauge head is also vertical mutually.
5. cylindrical straight gear involute spline ring gauge as claimed in claim 4 is striden the measurement mechanism of excellent distance, it is characterized in that: the front end edge of a knife gauge head of described measurement gauge head is for carving type, and carving type termination central authorities is a long and narrow plane, and width is at 0.3～0.5mm.
6. stride the measurement mechanism of excellent distance as claim 4 or 5 described cylindrical straight gear involute spline ring gauges, it is characterized in that: on the worktable of horizontal length measuring machine, be provided with the ring gauge clamp system and be used for fixing tested spline ring gauge of installation and the measurement rod that chooses, described ring gauge clamp system comprises upper end clamping element and lower end clamping element, described upper end clamping element comprises the C type folder that covers on tested spline ring gauge ring and passes the gib screw that C type folder is used to withstand tested spline ring gauge upper end, described lower end clamping element comprises the pedestal on the worktable that is arranged on horizontal length measuring machine, be installed on the pedestal can forward and reverse rotation screw mandrel, on the screw mandrel of screw mandrel that is rotated in the forward and reverse rotation, be respectively arranged with the fixed strip that the upper end that moves horizontally with the screw mandrel rotation extends lower end in the tested spline ring gauge ring.
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| CN 201110184739 CN102278933B (en) | 2011-07-04 | 2011-07-04 | Measuring method and measuring device for stick span length of cylindrical straight tooth involute spline ring gauge |
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| CN 201110184739 CN102278933B (en) | 2011-07-04 | 2011-07-04 | Measuring method and measuring device for stick span length of cylindrical straight tooth involute spline ring gauge |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853732A (en) * | 2011-12-16 | 2013-01-02 | 哈尔滨东安发动机（集团）有限公司 | Inspection and regulation device of arc end tooth gauge |
| CN103453817A (en) * | 2013-08-27 | 2013-12-18 | 镇江索达联轴器有限公司 | Internal tooth opposite tooth adjustable location caliper gauge |
| CN104236425A (en) * | 2014-04-25 | 2014-12-24 | 西安航空动力股份有限公司 | Method for precisely measuring cross-rod distance value M of spline ring gauge |
| CN105082005A (en) * | 2015-05-04 | 2015-11-25 | 苏州市计量测试研究所 | Fixing clamp for cross-rod distance measurement |
| CN106500572A (en) * | 2016-12-16 | 2017-03-15 | 中航动力股份有限公司 | A kind of calibration tool of spray angle of nozzle detection probe location and method of calibration |
| CN106840006A (en) * | 2017-03-28 | 2017-06-13 | 核工业理化工程研究院 | Fluting part dimension measurement apparatus |
| CN108317931A (en) * | 2018-02-22 | 2018-07-24 | 盐城哈力动力传动及智能装备产业研究院有限公司 | A kind of worm screw distance over bar automatic measurement production line |
| CN109000542A (en) * | 2018-10-23 | 2018-12-14 | 东莞天龙阿克达电子有限公司 | A kind of wheel tooth socket internal diameter measuring instrument of internal gear |
| CN109323676A (en) * | 2018-10-11 | 2019-02-12 | 苏州市计量测试院 | A kind of measuring system and method for spline gauge distance over bar |
| CN111102895A (en) * | 2018-10-28 | 2020-05-05 | 国营四达机械制造公司 | Measuring tool and measuring method for wear loss of involute internal spline |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853732B (en) * | 2011-12-16 | 2016-08-24 | 哈尔滨东安发动机（集团）有限公司 | Circular arc end tooth gauge inspection adjusting apparatus |
| CN102853732A (en) * | 2011-12-16 | 2013-01-02 | 哈尔滨东安发动机（集团）有限公司 | Inspection and regulation device of arc end tooth gauge |
| CN103453817A (en) * | 2013-08-27 | 2013-12-18 | 镇江索达联轴器有限公司 | Internal tooth opposite tooth adjustable location caliper gauge |
| CN104236425A (en) * | 2014-04-25 | 2014-12-24 | 西安航空动力股份有限公司 | Method for precisely measuring cross-rod distance value M of spline ring gauge |
| CN104236425B (en) * | 2014-04-25 | 2017-08-25 | 西安航空动力股份有限公司 | A kind of precision measurement method realized to spline ring gauge distance over bar M values |
| CN105082005A (en) * | 2015-05-04 | 2015-11-25 | 苏州市计量测试研究所 | Fixing clamp for cross-rod distance measurement |
| CN106500572B (en) * | 2016-12-16 | 2019-02-01 | 中航动力股份有限公司 | A kind of spray angle of nozzle detection calibration tool and method of calibration of probe location |
| CN106500572A (en) * | 2016-12-16 | 2017-03-15 | 中航动力股份有限公司 | A kind of calibration tool of spray angle of nozzle detection probe location and method of calibration |
| CN106840006A (en) * | 2017-03-28 | 2017-06-13 | 核工业理化工程研究院 | Fluting part dimension measurement apparatus |
| CN108317931A (en) * | 2018-02-22 | 2018-07-24 | 盐城哈力动力传动及智能装备产业研究院有限公司 | A kind of worm screw distance over bar automatic measurement production line |
| CN108317931B (en) * | 2018-02-22 | 2024-01-26 | 盐城永安科技有限公司 | Automatic measurement production line for worm span rod distance |
| CN109323676A (en) * | 2018-10-11 | 2019-02-12 | 苏州市计量测试院 | A kind of measuring system and method for spline gauge distance over bar |
| CN109000542A (en) * | 2018-10-23 | 2018-12-14 | 东莞天龙阿克达电子有限公司 | A kind of wheel tooth socket internal diameter measuring instrument of internal gear |
| CN111102895A (en) * | 2018-10-28 | 2020-05-05 | 国营四达机械制造公司 | Measuring tool and measuring method for wear loss of involute internal spline |
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| CN102278933B (en) | 2012-10-03 |
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