CN105300239A - Method and device for measuring pitch diameter of external thread - Google Patents
Method and device for measuring pitch diameter of external thread Download PDFInfo
- Publication number
- CN105300239A CN105300239A CN201510713248.7A CN201510713248A CN105300239A CN 105300239 A CN105300239 A CN 105300239A CN 201510713248 A CN201510713248 A CN 201510713248A CN 105300239 A CN105300239 A CN 105300239A
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- external thread
- thread
- measuring
- pitch diameter
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Abstract
The invention relates to a method and a device for measuring the pitch diameter of an external thread, and belongs to the technical field of analysis and measurement control. The method comprises the steps of selecting three pins, measuring the three-pin value and calculating the pitch diameter of an external thread. A fixed bracket is fixedly connected with a base. The base is provided with a slide slot, and a mobile bracket is in sliding connection with the slide slot through a guide rib. The base is further provided with a guide slot. The top ends of the fixed bracket and the mobile bracket are each provided with a placement slot, and the directions of the placement slots are consistent with the axis of the fixed bracket. Adjusting seats are respectively provided with an avoiding slot in the bottom, and the adjusting seats are connected with the base through screws and disposed at the two sides of the fixed bracket. A circular magnetic sheet is attached to a side, near the fixed bracket, of each adjusting seat. A measuring scale bracket is fixedly connected with the base. The measuring ruler bracket is provided with a scale insertion slot in which a measuring scale is inserted. The advantages are as follows: the measuring method is simple; the measuring device has the characteristics of small size, low cost, novel structure, flexible operation and high universality; and the measuring accuracy and work efficiency are improved.
Description
Technical field
The invention belongs to analysis and survey control technology field, particularly relate to a kind of method and the device of measuring pitch diameter of external thread, be applicable to worm measuring.
Background technology
60 ° are for metric thread and U.S. standard screw thread, two kinds of form of thread angles, directly can measure with pitch diameter of thread milscale; But when not possessing pitch diameter of thread milscale, and for inch screw thread (thread form angle 55 °), acme thread (thread form angle metric system 30 °, 29 ° made in U.S.A and made in Great Britain), worm screw etc., central diameter is measured very difficult.Now need to measure the pitch diameter of thread by three-needle measuring method.
The three-needle measuring pitch diameter of thread is a kind of method of indirect inspection central diameter, that three very high, that diameter is identical metering pins of precision are placed in the teeth groove of measured piece, measure three pin side dimension with measurement instrument such as the measurers such as milscale of measurement size, then according to formula, calculate the pitch diameter of thread.Current three pin values are measured generally by two kinds of methods: one is measure with special three pin value surveying instruments, and this method cost is high; Two is without instrument, measures with hand support measured piece and three pins, and because three pins and the fixing of measured piece will be completed by a hand, need skilled operation skill, it is low that this method measures efficiency.
Summary of the invention
The invention provides a kind of method and the device of measuring pitch diameter of external thread, there is the inefficient problem of measurement to solve prior art.
The technical scheme that the present invention takes comprises the following steps:
(1) three pins are selected:
Adopt tested thread pitch, two, tested thread pressure angle parameter, by calculating at the beginning of primary election three pin diameter value d, at the beginning of d=sec (α/2) P/2, in formula: P is thread pitch, α is thread pressure angle, then contrast with complete standard three pin, immediate a set of three pins of three pin diameter values that selection and calculation goes out;
(2) measurement mechanism is utilized to measure external thread three pin value M;
(3) calculate pitch diameter of external thread D, employing computing formula is:
D=M-d [1+1/sin (α/2)]+P/2cot (α/2), in formula: M is screw thread three pin value, d is the three pin diameters selected.
The structure of measurement mechanism of the present invention is: fixed support is fixedly connected with base, and base has chute, and this chute direction is consistent with support bracket fastened axis, has guiding rib bottom traversing carriage, and this traversing carriage is connected with slide by guiding rib; Base there is gathering sill, this gathering sill direction is vertical with support bracket fastened axis direction, there is standing groove on the top of fixed support and traversing carriage respectively, this standing groove direction is consistent with fixed support axis, has escape groove bottom adjustment seat, and this adjustment seat to be connected with base by screw and to be positioned at fixed support both sides, circular magnetic sheet is inhaled and is closed on side in adjustment seat with fixed support, dip stick support is fixedly connected with base, dip stick support has slotting chi groove, dip stick and the grafting of slotting chi groove.
Described dip stick is the measurer of general measurement size.
Described dip stick is outside micrometer, dial gauge, vernier caliper.
Described slotting chi groove is tipper, and be 20-60 ° with vertical direction angle of inclination, channel opening direction upwards.
Advantage of the present invention is: measuring method is simple, and measurement mechanism novel structure, volume are little, cost is low, flexible operation, highly versatile, be convenient for measuring, and improves measurement accuracy and work efficiency.Measurement mechanism in the present invention is not limited to measurement external thread, also can measure the outside dimension of other cylindrical component, is widely used in machinery, automobile and other industries fields of measurement.
Accompanying drawing explanation
Fig. 1 is the structural representation of measurement mechanism of the present invention, and figure comprises measured piece and three pins;
Fig. 2 is the wiring layout of measurement mechanism of the present invention.
Embodiment
Comprise the following steps:
(1) three pins are selected:
Adopt tested thread pitch, two, tested thread pressure angle parameter, by calculating at the beginning of primary election three pin diameter value d, at the beginning of d=sec (α/2) P/2, in formula: P is thread pitch, α is thread pressure angle, then contrast with complete standard three pin, immediate a set of three pins of three pin diameter values that selection and calculation goes out;
(2) measurement mechanism is utilized to measure external thread three pin value M;
(3) calculate pitch diameter of external thread D, employing computing formula is:
D=M-d [1+1/sin (α/2)]+P/2cot (α/2), in formula: M is screw thread three pin value, d is the three pin diameters selected.
The structure of measurement mechanism of the present invention is: fixed support 2 is fixedly connected with base 1, base 1 there is chute 11, this chute direction is consistent with the axis of fixed support 2, has guiding rib 12 bottom traversing carriage 4, and this traversing carriage 4 is slidably connected by guiding rib 12 and chute 11; Base 1 there is gathering sill 15, this gathering sill direction is vertical with the axis direction of fixed support 2, fixed support 2 has standing groove 13 respectively with the top of traversing carriage 4, this standing groove direction is consistent with fixed support 2 axis, escape groove 14 is had bottom adjustment seat 3, this adjustment seat 3 to be connected with base by screw 9 and to be positioned at fixed support 2 both sides, and circular magnetic sheet 10 is inhaled and closed on side in adjustment seat 3 with fixed support 2; Dip stick support 5 is fixedly connected with base 1, dip stick support 5 has slotting chi groove 17, dip stick 6 and the grafting of slotting chi groove.
Described dip stick 6 is measurers of general measurement size.
Described dip stick 6 is outside micrometer, dial gauge, vernier caliper.
Described slotting chi groove 17 is tipper, and be 20-60 ° with vertical direction angle of inclination, channel opening direction upwards.
In measuring process, as Fig. 1, shown in 2, base 1 is positioned on horizontal table, by two adjustment seats 3 by illustrated direction, be positioned in the gathering sill 15 of fixed support 2 both sides respectively, gib screw 9 is positioned over respectively in the threaded hole 16 on the corresponding base 1 of escape groove 14 below, do not tighten, circular magnetic sheet 10 is inhaled in adjustment seat 3 from the side that fixed support 2 closes on respectively by diagram, three pins 7 are inhaled respectively on circular magnetic sheet 10, by direction as shown, measured piece 8 is positioned in the standing groove 13 of fixed support 2, slow mobile adjustment seat 3, gradually near measured piece 8, adjust three pin 7 lateral attitude and angles of inclination, three pins 7 are leaned against in measured piece 8 teeth groove, just enter in worm screw teeth groove to be advisable with three pins, tighten gib screw 9, adjustment seat 3 is fixed, as longer in measured piece 8, can traversing carriage 4 be installed on base 1, during operation, guarantee that guiding rib 12 is put in chute 11, adjustment traversing carriage 4 position, support measured piece 8.
After three pins 7 install with measured piece 8, by direction as shown, dip stick support 5 is placed on base 1, the threaded hole 16 that fixed orifice 18 is corresponding with on base 1 aligns, by gib screw 9, dip stick support 5 is fixed on base 1, dip stick 6 is inserted by direction as shown and inserts in chi groove 17, adjustment dip stick 6 position, measures measured piece 8 three pin value M.
After measuring measured piece 8 three pin value M, three pin value M, three pin 7 diameter d of selection, thread pitch P, thread pressure angle α are substituted into formula below:
D=M-d[1+1/sin(α/2)]+P/2·cot(α/2)
The pitch diameter of thread D calculated.
Measurement mechanism in the present invention also can measure the outside dimension of other cylindrical component, and part fixed form is identical with above-mentioned measured piece, is just unloaded by three pins 7, directly reads from dip stick 6 and measure numerical value during measurement.
Claims (5)
1. measure a method for pitch diameter of external thread, it is characterized in that comprising the following steps:
(1) three pins are selected:
Adopt tested thread pitch, two, tested thread pressure angle parameter, by calculating at the beginning of primary election three pin diameter value d, at the beginning of d=sec (α/2) P/2, in formula: P is thread pitch, α is thread pressure angle, then contrast with complete standard three pin, immediate a set of three pins of three pin diameter values that selection and calculation goes out;
(2) measurement mechanism is utilized to measure external thread three pin value M;
(3) calculate pitch diameter of external thread D, employing computing formula is:
D=M-d [1+1/sin (α/2)]+P/2cot (α/2), in formula: M is screw thread three pin value, d is the three pin diameters selected.
2. a kind of method measuring pitch diameter of external thread as claimed in claim 1, it is characterized in that the structure of described measurement mechanism is: fixed support is fixedly connected with base, base there is chute, this chute direction is consistent with support bracket fastened axis, have guiding rib bottom traversing carriage, this traversing carriage is connected with slide by guiding rib; Base there is gathering sill, this gathering sill direction is vertical with support bracket fastened axis direction, there is standing groove on the top of fixed support and traversing carriage respectively, this standing groove direction is consistent with fixed support axis, has escape groove bottom adjustment seat, and this adjustment seat to be connected with base by screw and to be positioned at fixed support both sides, circular magnetic sheet is inhaled and is closed on side in adjustment seat with fixed support, dip stick support is fixedly connected with base, dip stick support has slotting chi groove, dip stick and the grafting of slotting chi groove.
3. a kind of method measuring pitch diameter of external thread as claimed in claim 2, is characterized in that: described dip stick is the measurer of general measurement size.
4. a kind of method measuring pitch diameter of external thread as claimed in claim 3, is characterized in that: the measurer of described general measurement size is outside micrometer, dial gauge, vernier caliper.
5. a kind of method measuring pitch diameter of external thread as claimed in claim 2, is characterized in that: described slotting chi groove is tipper, and be 20-60 ° with vertical direction angle of inclination, channel opening direction upwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510713248.7A CN105300239A (en) | 2015-10-28 | 2015-10-28 | Method and device for measuring pitch diameter of external thread |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510713248.7A CN105300239A (en) | 2015-10-28 | 2015-10-28 | Method and device for measuring pitch diameter of external thread |
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| Publication Number | Publication Date |
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| CN105300239A true CN105300239A (en) | 2016-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510713248.7A Pending CN105300239A (en) | 2015-10-28 | 2015-10-28 | Method and device for measuring pitch diameter of external thread |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106767296A (en) * | 2016-12-19 | 2017-05-31 | 河南平高电气股份有限公司 | A kind of pitch diameter of external thread measurement apparatus |
| 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 |
| CN108317938A (en) * | 2017-01-16 | 2018-07-24 | 浙江师范大学 | A kind of involute helicoid worm pressure angle special measuring tool |
| CN111928809A (en) * | 2020-08-03 | 2020-11-13 | 淮安市迈奕机电设备有限公司 | Method for measuring pitch diameter of thread by utilizing threaded roller measuring anvil |
| CN113091570A (en) * | 2021-03-20 | 2021-07-09 | 浙江夏厦精密制造股份有限公司 | Worm rod span distance detection device and method with automatic deviation rectification function |
| CN113483630A (en) * | 2020-12-24 | 2021-10-08 | 无锡恒尔捷精密机械制造有限公司 | Detection method for thread pitch diameter reference |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57147002A (en) * | 1981-03-06 | 1982-09-10 | Mitsutoyo Mfg Co Ltd | Displacement detecting device |
| CN101158567A (en) * | 2007-11-15 | 2008-04-09 | 沈阳飞机工业（集团）有限公司 | Plug thread gage measurement hanging rack |
| CN202204502U (en) * | 2011-09-19 | 2012-04-25 | 贵州航太精密制造有限公司 | Device for measuring pitch diameter of external thread |
| CN104457556A (en) * | 2013-09-23 | 2015-03-25 | 上海市计量测试技术研究院 | Turbine component and stud standard part coaxiality measuring device and method |
| CN104764373A (en) * | 2015-04-15 | 2015-07-08 | 南车戚墅堰机车车辆工艺研究所有限公司 | Automatic detection method and device for thread plug gage |
| CN105423969A (en) * | 2015-11-18 | 2016-03-23 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for measuring geometric parameters of large-diameter thread form |
-
2015
- 2015-10-28 CN CN201510713248.7A patent/CN105300239A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57147002A (en) * | 1981-03-06 | 1982-09-10 | Mitsutoyo Mfg Co Ltd | Displacement detecting device |
| CN101158567A (en) * | 2007-11-15 | 2008-04-09 | 沈阳飞机工业（集团）有限公司 | Plug thread gage measurement hanging rack |
| CN202204502U (en) * | 2011-09-19 | 2012-04-25 | 贵州航太精密制造有限公司 | Device for measuring pitch diameter of external thread |
| CN104457556A (en) * | 2013-09-23 | 2015-03-25 | 上海市计量测试技术研究院 | Turbine component and stud standard part coaxiality measuring device and method |
| CN104764373A (en) * | 2015-04-15 | 2015-07-08 | 南车戚墅堰机车车辆工艺研究所有限公司 | Automatic detection method and device for thread plug gage |
| CN105423969A (en) * | 2015-11-18 | 2016-03-23 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for measuring geometric parameters of large-diameter thread form |
Non-Patent Citations (1)
| Title |
|---|
| 严雅君: "公制梯形螺纹塞规中径测量斜率误差分析", 《上海计量测试》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106767296A (en) * | 2016-12-19 | 2017-05-31 | 河南平高电气股份有限公司 | A kind of pitch diameter of external thread measurement apparatus |
| CN106767296B (en) * | 2016-12-19 | 2019-07-05 | 河南平高电气股份有限公司 | A kind of pitch diameter of external thread measuring device |
| 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 |
| CN108317938A (en) * | 2017-01-16 | 2018-07-24 | 浙江师范大学 | A kind of involute helicoid worm pressure angle special measuring tool |
| CN108317938B (en) * | 2017-01-16 | 2023-05-12 | 浙江师范大学 | Special measuring tool for involute worm pressure angle |
| CN111928809A (en) * | 2020-08-03 | 2020-11-13 | 淮安市迈奕机电设备有限公司 | Method for measuring pitch diameter of thread by utilizing threaded roller measuring anvil |
| CN113483630A (en) * | 2020-12-24 | 2021-10-08 | 无锡恒尔捷精密机械制造有限公司 | Detection method for thread pitch diameter reference |
| CN113091570A (en) * | 2021-03-20 | 2021-07-09 | 浙江夏厦精密制造股份有限公司 | Worm rod span distance detection device and method with automatic deviation rectification function |
| CN113091570B (en) * | 2021-03-20 | 2022-07-05 | 浙江夏厦精密制造股份有限公司 | Worm rod span distance detection device and method with automatic deviation rectification function |
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Application publication date: 20160203 |
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