CN104748646A - External thread pitch diameter measuring method - Google Patents
External thread pitch diameter measuring method Download PDFInfo
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- CN104748646A CN104748646A CN201510145471.6A CN201510145471A CN104748646A CN 104748646 A CN104748646 A CN 104748646A CN 201510145471 A CN201510145471 A CN 201510145471A CN 104748646 A CN104748646 A CN 104748646A
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- external thread
- pitch diameter
- milscale
- measuring method
- test bars
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Abstract
The invention relates to an external thread pitch diameter measuring method. According to the technical scheme, the external thread pitch diameter measuring method includes taking three equal standard detection bars with diameters known as auxiliary detection tools; placing one detection bar in a tooth-shaped groove of an external thread, and placing the rest detection bars in two opposite tooth-shaped grooves; adopting a micrometer with a measuring side clamped onto the outer edges of detection bars to detect distances between the outer edges of the detection bars; obtaining an actual measuring value of the pitch diameter of the external thread through calculation. In this way, the pitch diameter of the external thread is accurately measured in real time, production allowance is obtained based on the required specific size and measuring value, and the external thread is subjected to relief grinding of a thread grinder to grind tooth shape until production standard is met. According to the external thread pitch diameter measuring method, the external thread pitch diameter can be accurately measured.
Description
Technical field
The present invention relates to the measuring method of external thread diameter, particularly the measuring method of pitch diameter of external thread.
Background technology
External thread is adding man-hour, be the most accurately, but the pitch diameter of thread is not easily measured to detect externally threaded central diameter.Externally threaded profile of tooth is undertaken controlling by the relieving technique of thread grinder, and thread grinding is continuous reconditioning profile of tooth and central diameter size.Therefore, do not measure the pitch diameter of thread, then uncontrollable thread grinding processing capacity.Generally, externally threaded central diameter measures with ring thread gage, and this detection method belongs to comparative measurement method.Ring thread gage is the scope that the given pitch diameter of thread is measured when measuring, and exceedes ring gauge go side and is no more than ring gauge not-go-end and is qualified, instead of measure the full-size(d) of the pitch diameter of thread.The final detection of the relatively more suitable pitch diameter of external thread of ring thread gage.And in threading (as screw tap) process, in order to ensure the size of pitch diameter of external thread, when taking, monitor the process redundancy of screw thread, also namely need the concrete size value of surveying the pitch diameter of thread.
Summary of the invention
The object of this invention is to provide a kind of method simple, can the pitch diameter of external thread job operation of concrete size value of the Real-Time Monitoring pitch diameter of thread.
The technical solution used in the present invention is: a kind of pitch diameter of external thread measuring method, comprises the steps: to get three the identical and standard detection that diameter is known rods as auxiliary detection instrument; Be placed in by a test bar in an externally threaded serrate slot, another two test bars are placed in two serrate slots of relative position; Get milscale, the measuring surface of milscale is stuck in the outer rim of 3 test bars, measures the distance between test bar outer rim; Be calculated as follows pitch diameter of external thread:
d2＝M-d{1+1/sin(α/2)+L×ctg(α/2)/2}
Wherein, d2---pitch diameter of external thread;
Distance between the test bar outer rim that M---milscale records;
D---the diameter of standard detection rod;
L---pitch;
α---thread tooth angle.
Above-mentioned pitch diameter of external thread measuring method, when the measuring surface of milscale is stuck in the outer rim of 3 test bars, slowly screws milscale, and miking face is excessively coordinated with three test bars.
Above-mentioned pitch diameter of external thread measuring method, three test bars are vertical with externally threaded axis, radial parallel, after screwing milscale, touch three test bars, when only having whole three test bars not move, then measure the distance M between three test bar outer rims.
The invention has the beneficial effects as follows: the externally threaded central diameter that can be detected processing by method of the present invention in real time, according to required concrete size, according to measured value, learn process redundancy, reconditioning tooth form is proceeded again by the relieving technique of thread grinder, until meet production standard, externally threaded central diameter value can be detected accurately by method of the present invention.
Accompanying drawing explanation
Fig. 1 is instrumentation plan of the present invention.
Fig. 2 is scale diagrams of the present invention.
Embodiment
A kind of pitch diameter of external thread measuring method of embodiment
Comprise the steps:
1) get three identical, and the known standard detection rod (1) of diameter is as auxiliary detection instrument;
2) as depicted in figs. 1 and 2, be placed in by a test bar in a serrate slot of external thread (3), another two test bars are placed in two serrate slots of relative position;
3) milscale is got, the measuring surface (2) of milscale is stuck in the outer rim of 3 test bars, milscale is slowly screwed, milscale is excessively coordinated with three test bars, and makes three test bars vertical with externally threaded axis, radial parallel, after screwing milscale, touch three test bars, when only having whole three test bars not move, then measure the distance M between three test bar outer rims.Then pitch diameter of external thread is calculated as follows:
d2＝M-d{1+1/sin(α/2)+L×ctg(α/2)/2}
Wherein, d2---pitch diameter of external thread;
Distance between the test bar outer rim that M---milscale records;
D---the diameter of standard detection rod;
L---pitch;
α---thread tooth angle.
4), according to the measured value of the pitch diameter of external thread calculated, after comparing with standard central diameter value, obtain grinding allowance, then proceed reconditioning tooth form by the relieving technique of thread grinder, repeated measurement and reconditioning are until meet pitch diameter of external thread standard.
Claims (3)
1. a pitch diameter of external thread measuring method, is characterized in that comprising the steps: getting three the identical and standard detection that diameter is known rods as auxiliary detection instrument; Be placed in by a test bar in an externally threaded serrate slot, another two test bars are placed in two serrate slots of relative position; Get milscale, the measuring surface of milscale is stuck in the outer rim of 3 test bars, measures the distance between test bar outer rim; Be calculated as follows pitch diameter of external thread:
d2＝M-d{1+1/sin(α/2)+L×ctg(α/2)/2}
Wherein, d2---pitch diameter of external thread;
Distance between the test bar outer rim that M---milscale records;
D---the diameter of standard detection rod;
L---pitch;
α---thread tooth angle.
2. pitch diameter of external thread measuring method according to claim 1, is characterized in that: when the measuring surface of milscale is stuck in the outer rim of 3 test bars, slowly screwed by milscale, and milscale is excessively coordinated with three test bars.
3. pitch diameter of external thread measuring method according to claim 2, it is characterized in that: three test bars are vertical with externally threaded axis, radial parallel, after screwing milscale, touch three test bars, when only having whole three test bars not move, then measure the distance M between three test bar outer rims.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510145471.6A CN104748646A (en) | 2015-03-30 | 2015-03-30 | External thread pitch diameter measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510145471.6A CN104748646A (en) | 2015-03-30 | 2015-03-30 | External thread pitch diameter measuring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104748646A true CN104748646A (en) | 2015-07-01 |
Family
ID=53588697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510145471.6A Pending CN104748646A (en) | 2015-03-30 | 2015-03-30 | External thread pitch diameter measuring method |
Country Status (1)
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| CN (1) | CN104748646A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106392206A (en) * | 2016-08-23 | 2017-02-15 | 中国船舶重工集团公司第十二研究所 | Tooth form geometrical parameter measurement method for online machining of large-diameter multi-thread ring gauge |
| CN106871766A (en) * | 2016-12-29 | 2017-06-20 | 中钢集团邢台机械轧辊有限公司 | The measuring method of big pitch pitch diameter of external thread |
| CN107036506A (en) * | 2017-05-24 | 2017-08-11 | 山东建筑大学 | A kind of survey tool of internal and external threads central diameter |
| CN110940253A (en) * | 2019-11-14 | 2020-03-31 | 贵州高峰石油机械股份有限公司 | Method for measuring three-spiral stabilizers with different diameters and equal pitches |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3511690A1 (en) * | 1975-04-07 | 1986-10-16 | Michail 1000 Berlin Efune | Device for measuring gear-tooth thickness by means of measuring wires |
| CN2122373U (en) * | 1990-12-30 | 1992-11-18 | 彭贤会 | Pitch diameter admeasuring apparatus |
| US6145207A (en) * | 1998-03-23 | 2000-11-14 | Brunson Instrument Company | Thread pitch diameter measuring system |
| CN201417120Y (en) * | 2009-06-21 | 2010-03-03 | 吴峰山 | slide gauge for effective diameter of thread |
| CN203464876U (en) * | 2013-10-12 | 2014-03-05 | 广西玉柴机器股份有限公司 | Tool used for measuring cylindrical-thread pitch diameter |
-
2015
- 2015-03-30 CN CN201510145471.6A patent/CN104748646A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3511690A1 (en) * | 1975-04-07 | 1986-10-16 | Michail 1000 Berlin Efune | Device for measuring gear-tooth thickness by means of measuring wires |
| CN2122373U (en) * | 1990-12-30 | 1992-11-18 | 彭贤会 | Pitch diameter admeasuring apparatus |
| US6145207A (en) * | 1998-03-23 | 2000-11-14 | Brunson Instrument Company | Thread pitch diameter measuring system |
| CN201417120Y (en) * | 2009-06-21 | 2010-03-03 | 吴峰山 | slide gauge for effective diameter of thread |
| CN203464876U (en) * | 2013-10-12 | 2014-03-05 | 广西玉柴机器股份有限公司 | Tool used for measuring cylindrical-thread pitch diameter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106392206A (en) * | 2016-08-23 | 2017-02-15 | 中国船舶重工集团公司第十二研究所 | Tooth form geometrical parameter measurement method for online machining of large-diameter multi-thread ring gauge |
| CN106392206B (en) * | 2016-08-23 | 2018-07-06 | 中国船舶重工集团公司第十二研究所 | A kind of major diameter multiple thread ring gauge on-line machining tooth form geometric parameter measurement method |
| CN106871766A (en) * | 2016-12-29 | 2017-06-20 | 中钢集团邢台机械轧辊有限公司 | The measuring method of big pitch pitch diameter of external thread |
| CN107036506A (en) * | 2017-05-24 | 2017-08-11 | 山东建筑大学 | A kind of survey tool of internal and external threads central diameter |
| CN110940253A (en) * | 2019-11-14 | 2020-03-31 | 贵州高峰石油机械股份有限公司 | Method for measuring three-spiral stabilizers with different diameters and equal pitches |
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Application publication date: 20150701 |