CN100480616C - Device of measuring internal thread - Google Patents

Device of measuring internal thread Download PDF

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CN100480616C
CN100480616C CNB2007100440815A CN200710044081A CN100480616C CN 100480616 C CN100480616 C CN 100480616C CN B2007100440815 A CNB2007100440815 A CN B2007100440815A CN 200710044081 A CN200710044081 A CN 200710044081A CN 100480616 C CN100480616 C CN 100480616C
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measuring
measuring unit
movable sleeve
sounding rod
internal thread
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CN101093158A (en
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陈建国
胡大超
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Yaxin Continuous Caster Technology & Engineering (Shanghai) Co.,Ltd.
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Shanghai Institute of Technology
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Abstract

A measurement device of internal thread is prepared for connecting measurement sleeve to measurement regulation block through guide slot in active mode, inserting measurement hole of said regulation block into the first measurement rod being set to be contacted with slope surface of slope surface active sleeve through waist hole on measurement sleeve, inserting the second measurement rod into measurement hole and contacting the second measurement rod with slope surface of slope surface active-sleeve for directly measuring internal thread quantitatively.

Description

Device of measuring internal thread
Technical field
The present invention relates to a kind of measurement screw device, especially a kind of device that is used to measure internal thread.
Background technology
At present, the usual method of the measurement of internal thread is to carry out composite measurement with drift and no-go gage.The major defect that this measurement inspection method exists is:
(1) thread profile gauge can only can not be measured the screw thread physical size to being carried out qualitative examination by seizure of the thread;
(2) with a kind of screw thread of specification because the feeler gauge of accuracy requirement different needs preparation different accuracy;
(3) not the tooth form angle and the pitch of energy measurement internal thread.
Therefore, the principle of this metering system and smooth cylindrical measurement is similar, and drift can pass through, and no-go gage can not pass through, and it can only judge whether screw thread is qualified, not footpath and tooth form angle equidimension in the energy measurement reality.For this reason, Chinese patent application 92102742.7, open day 1993.10.13, a kind of screw measurement measurer is disclosed, it utilizes the pitch diameter of thread to change the relation that causes end play to change, the screw thread end play that records is scaled diameter dimension changes, utilize electronic digital display, clock gauge or scale to be shown as pitch diameter of thread tolerance value less screw thread end play; It is replaceable to measure pair, measures the screw thread of the identical various different sizes of screw thread pressure angle, realizes the quantitative measurment of thread size.
This screw measurement measurer, utilize the pitch diameter of thread to change the relation that causes end play to change, the screw thread end play that records is scaled diameter dimension changes, the pitch diameter of thread that can not directly instead swap out changes, and there is a transformed error, the tooth form angle of energy measurement internal thread not especially.
Summary of the invention
The present invention will provide a kind of device of measuring internal thread, is used for solving the technical matters that the direct quantitative of footpath, tooth form angle, the pitch of internal thread is checked.
For achieving the above object, technical scheme of the present invention is: a kind of device of measuring internal thread, comprise adjusting handle, and measuring unit, sounding rod, connecting link is characterized in: flexibly connect connecting link in the measuring unit, and connecting link is fixed in the axial direction with measuring unit; The fixedly connected adjusting handle in connecting link upper end, the lower end is by the inclined-plane movable sleeve that is threaded, and the small end face of inclined-plane movable sleeve is to connecting link, have gathering sill on the inclined-plane movable sleeve periphery, and be connected by gathering sill and the circular pegs that is fixed on the measuring unit, be used for the upper and lower mobile guide of inclined-plane movable sleeve; Measuring unit one side flexibly connects the measuring and adjusting piece by gathering sill, be inserted with first sounding rod in the measured hole of measuring and adjusting piece, the long lumbar hole that first sounding rod passes measuring unit contacts with the inclined-plane of inclined-plane movable sleeve, second sounding rod inserts the measured hole of measuring unit, and contact with the inclined-plane of inclined-plane movable sleeve, and first sounding rod and second sounding rod are parallel to each other; The measuring junction of two sounding rods is sphere; Adjusting handle is provided with mark line; Be carved with scale mark on the periphery of measuring unit top.
The measuring unit exterior upper portion is with measuring seat spare, and measuring seat spare and measuring unit clearance fit; Be carved with alignment line above the measuring seat spare; Gathering sill on the measuring unit is a dovetail groove;
Inclined-plane movable sleeve length 1=(0.8～0.85) * diameter of screw M; Gradient θ=1:20～1:30; Diameter D=(0.75～the 0.8) * diameter of screw M of measuring unit; Length L=(1.4～1.5) * diameter of screw M.
The present invention's beneficial effect compared with prior art is: it is upper and lower mobile to drive the inclined-plane movable sleeve by the connecting link in the company's of rotation measuring unit, make the measuring and adjusting piece on first sounding rod upper and lower move and measuring unit on second sounding rod enter respectively in the adjacent thread, directly can record and calculate middle footpath, pitch value; By with different r 0Sounding rod 4, measure twice measured value n and N, calculate through tooth form angle formula and can obtain the tooth form angular dimensions.
Therefore, the middle footpath of the direct measurement internal thread that the present invention can be quantitative, tooth form angle, pitch, and it is little to have measuring error, simple in structure, characteristics such as easy to use have solved the technical matters that the direct quantitative of middle footpath, tooth form angle, the pitch of internal thread is checked.
Description of drawings
Fig. 1 is a measurement status architecture cut-open view of the present invention;
Fig. 2 is along the cut-open view of A-A among Fig. 1;
Fig. 3 is a measurement of the present invention back status architecture cut-open view;
Fig. 4 is the main cut-open view of measuring unit;
Fig. 5 is the left view of Fig. 4;
Fig. 6 is the vertical view of Fig. 4;
Fig. 7 is an inclined-plane movable sleeve master cut-open view;
Fig. 8 is the vertical view of Fig. 7;
Fig. 9 is the sounding rod synoptic diagram.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
As Fig. 1, shown in 2, device of measuring internal thread of the present invention comprises adjusting handle 1, measuring unit 2, the first sounding rods 4, inclined-plane movable sleeve 5, the second sounding rods 6, connecting link 10.
Flexibly connect connecting link 10 in the measuring unit 2, and connecting link 10 is fixing with turn 9 at axial direction with measuring unit 2, when connecting link 10 is rotated, axially can not move.Connecting link 10 upper ends are by the adjusting handle 1 that is threaded, markedness line A above the adjusting handle, the lower end is by the inclined-plane movable sleeve 5 that is threaded, the bar 10 that is rotationally connected can upper and lowerly move inclined-plane movable sleeve 5, and the small end face of inclined-plane movable sleeve 5 is to connecting link 10, have gathering sill on inclined-plane movable sleeve 5 peripheries, and be connected by gathering sill and the circular pegs 11 that is fixed on the measuring unit 2, circular pegs 11 is to be fixed on the measuring unit 2 by tight slightly transition fit, and circular pegs 11 plays the guide effect to inclined-plane movable sleeve 5.
Measuring unit 2 passes on left dovetail groove and installs and measures regulating block 3, and measuring and adjusting piece 3 is along dovetail groove moving of small distance up and down.Be inserted with first sounding rod 4 in the measured hole of measuring and adjusting piece 3, the long lumbar hole that first sounding rod 4 passes measuring unit 2 contacts with the inclined-plane of inclined-plane movable sleeve 5, second sounding rod 6 inserts the measured hole of measuring unit 2, and contact with the inclined-plane of inclined-plane movable sleeve 5, and first sounding rod 4 and second sounding rod 6 are parallel to each other.Measuring unit 2 has long waist shaped hole (shown in Figure 5), does moving of small distance to satisfy first sounding rod 4.Measuring seat spare 8 skies are enclosed within the outside of measuring unit 2, turn and move axially, and its effect is to prevent that measurement mechanism from tilting, and is carved with alignment line C on it, uses when measuring pitch.
As shown in Figure 9, the measuring junction of two sounding rods 4,6 is sphere, is equivalent to " line " in " trilinear method ".Be carved with scale mark B (shown in Figure 5) on the measuring unit 2 top peripheries;
Extremely shown in Figure 6 as Fig. 4, measuring unit 2 key dimensions:
Diameter D=(0.75～0.8) M
Dovetail groove bottom width degree K '=(0.22～0.25) M
Depth of dovetail relative dimensions K=(0.67～0.69) M
Dovetail groove base angle β=75 °～80 °
Length L=(1.4～1.5) M
L′＝(0.45～0.5)M
t 0=0.5 * pitch t
t′＝(0.25～0.35)t
t″＝(0.125～0.175)t
Width s ≈ 1.1
Guiding circular pegs 11 diameter d 1=C
As Fig. 7, shown in 8, the determining of inclined-plane movable sleeve 5 key dimensions:
If tested diameter of screw be M, pitch t then:
Length 1=(0.8～0.85) M;
Size b=(0.028～0.033) M
Diameter d '=d-(0.5～1.5) mm
Gradient θ=1:20～1:30
Gathering sill width C=(0.075～0.85) M is (with figure below d 1)
Gathering sill degree of depth relative dimensions e=(0.25～0.3) M
As shown in Figure 9, sounding rod hole d 0=2 R0
d 0Or r 0Span be calculated as follows:
Figure C200710044081D00081
Measuring process of the present invention:
A. footpath d in 2Measure:
(1) rotates adjusting handle 1, connecting link 10 is rotated;
(2) because connecting link 10 rotates, make on the inclined-plane movable sleeve 5 or down and move; Inclined-plane movable sleeve 5 is moved down, and at this moment first sounding rod 4 and second sounding rod 6 are in less diameter;
(3) entire measuring device is screwed in the tested screw thread 7, promptly first sounding rod 4 and second sounding rod 6 are in the respective threads groove;
(4) rotation adjusting handle 1 makes to move on the inclined-plane movable sleeve 5 first sounding rod 4 and second sounding rod 6 is in than major diameter, and holds out against screw thread gently.When rotating adjusting handle 1, on adjusting handle 1, form 2～3 newton's radial pressures;
(5) relativeness between part mark line and adjusting handle 1 and measuring unit 2 high scales under the record;
(6) adjusting handle 1 is unscrewed 1～2 circle after, with entire measuring device (shown in Figure 3) the tested screw thread of back-outing;
(7) then, adjusting handle 1 is returned to original state, make mark line aim at scale;
Size between (8) first sounding rods 4 and second sounding rod 6 gets measured value n, can calculate the middle footpath of tested screw thread according to n.Formula is as follows
d 2 = N - 2 ( r 0 - r 0 sin α 2 + t / 4 tan α 2 )
In the formula: N----measured value (Fig. 3)
B. the measurement at tooth form angle:
According to the method described above, use spherical r respectively 0Be r 1And r 2Sounding rod measure twice measured value n and N, then the tooth form angle is calculated as follows:
Sin α 2 = r 2 - r 1 ( r 2 - r 1 ) + 1 2 ( N - n )
r 1And r 2Span: (Fig. 9) one of them gets the small value, and another gets big value.
C. the measurement of pitch:
(1) rotates adjusting handle 1, connecting link 10 is rotated;
(2) because connecting link 10 rotates, make on the inclined-plane movable sleeve 5 or down and move; Inclined-plane movable sleeve 5 is moved down, and at this moment first sounding rod 4 and second sounding rod 6 are in less diameter;
(3) entire measuring device is screwed in the tested screw thread, promptly first sounding rod 4 and second sounding rod 6 are in the respective threads groove.
(4) rotation adjusting handle 1 makes to move on the inclined-plane movable sleeve 5 first sounding rod 4 and second sounding rod 6 is in than major diameter, and holds out against screw thread gently.When rotating adjusting handle 1, on adjusting handle 1, form 2～3 newton's radial pressures;
(5) the t value of measurement size gets measured value t 1
(6) adjusting handle 1 is unscrewed 1～2 circle after, entire measuring device is rotated a circle entire measuring device is moved down, rotate measuring seat spare 8 and make mark line A and alignment line C alignment once more;
(7) then, turn adjusting handle 1 and make first sounding rod 4 and second sounding rod 6 hold out against screw thread, measurement size t value gets measured value t for the second time 2
(8) according to measured value t 1And t 2Get pitch t=t 2-t 1T is arranged successively 3-t 2,
The present invention makes the possible and more convenient measurement of each general data of internal thread.Can survey scope M 〉=16.
Measuring accuracy of the present invention:
Middle footpath is measured: STRTHD Δ d 2≯ 0.008; Acme thread Δ d 2≯ 0.023
d 2 = N - 2 ( r 0 - r 0 sin α 2 + t / 4 tan α 2 )
Tooth form angular measurement: α ≯ 0.2 °
Sin α 2 = r 2 - r 1 ( r 2 - r 1 ) + 1 2 ( N - n )
Pitch measurement: the error that this device causes approaches zero.

Claims (4)

1. a device of measuring internal thread comprises adjusting handle (1), measuring unit (2), sounding rod (4,6), connecting link (10), it is characterized in that, flexibly connect connecting link (10) in the described measuring unit (2), and connecting link (10) is fixing in the axial direction with measuring unit (2); Connecting link (10) upper end fixedly connected adjusting handle (1), the lower end is by the inclined-plane movable sleeve (5) that is threaded, and the small end face of inclined-plane movable sleeve (5) is to connecting link (10), have gathering sill on inclined-plane movable sleeve (5) periphery, and be connected by gathering sill and the circular pegs (11) that is fixed on the measuring unit (2), be used for the upper and lower mobile guide of inclined-plane movable sleeve (5); Measuring unit (2) one sides flexibly connect measuring and adjusting piece (3) by gathering sill, be inserted with first sounding rod (4) in the measured hole of measuring and adjusting piece (3), the long lumbar hole that first sounding rod (4) passes measuring unit (2) contacts with the inclined-plane of inclined-plane movable sleeve (5), second sounding rod (6) inserts the measured hole of measuring unit (2), and contact with the inclined-plane of inclined-plane movable sleeve (5), and first sounding rod (4) is parallel to each other with second sounding rod (6); The measuring junction of two sounding rods (4,6) is sphere; Adjusting handle (1) is provided with mark line (A); Be carved with scale mark (B) on the periphery of measuring unit (2) top; Described measuring unit (2) exterior upper portion is with measuring seat spare (8), and measuring seat spare (8) and measuring unit (2) clearance fit; Be carved with alignment line (C) above the measuring seat spare (8).
2. device of measuring internal thread according to claim 1 is characterized in that, the gathering sill on the described measuring unit (2) is a dovetail groove.
3. device of measuring internal thread according to claim 1 is characterized in that, length 1=(0.8～the 0.85) * diameter of screw M of described inclined-plane movable sleeve (5); Gradient θ=1:20～1:30.
4. according to claim 1 or 3 described device of measuring internal thread, it is characterized in that diameter D=(0.75～the 0.8) * diameter of screw M of described measuring unit (2); Length L=(1.4～1.5) * diameter of screw M.
CNB2007100440815A 2007-07-20 2007-07-20 Device of measuring internal thread Active CN100480616C (en)

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102506659A (en) * 2011-11-17 2012-06-20 西安航空动力控制有限责任公司 Female thread pitch diameter precision measuring device and measuring method
CN102564385B (en) * 2011-12-12 2014-06-11 陕西汉江机床有限公司 Device for detecting internal circulation nut of ball screw assembly
CN104930950A (en) * 2015-06-12 2015-09-23 沈阳航天新光集团有限公司 Spherical inner thread pitch diameter measuring method
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
CN111207706B (en) * 2020-01-16 2021-10-26 中车株洲电力机车有限公司 Detection device and detection method for umbrella-shaped insection part
CN114909982B (en) * 2022-06-21 2024-04-02 中煤科工集团重庆研究院有限公司 Thread phase angle detection device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4856198A (en) * 1988-05-09 1989-08-15 William P. Green Gauge for internal threads
US5020230A (en) * 1990-07-10 1991-06-04 Greenslade Joe E Internal thread gage

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4856198A (en) * 1988-05-09 1989-08-15 William P. Green Gauge for internal threads
US5020230A (en) * 1990-07-10 1991-06-04 Greenslade Joe E Internal thread gage

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