CN103615960B - External thread coaxality measuring mechanism and measuring method - Google Patents
External thread coaxality measuring mechanism and measuring method Download PDFInfo
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- CN103615960B CN103615960B CN201310686336.3A CN201310686336A CN103615960B CN 103615960 B CN103615960 B CN 103615960B CN 201310686336 A CN201310686336 A CN 201310686336A CN 103615960 B CN103615960 B CN 103615960B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 11
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007514 turning Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
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Abstract
The invention discloses a kind of external thread coaxality measuring mechanism and measuring method, device comprises clock gauge, measurer block, standard metering pin, stop means, bracing or strutting arrangement and pedestal, measurer block has upper surface and lower surface, standard metering pin is at least two, stop means comprises radial gag lever post, axial limiting bar, metering pin tie rod and silk thread, radial gag lever post, axial limiting bar lays respectively at by the other and side of an end face of measurer block, metering pin tie rod is positioned at by the other end of measurer block, one end of silk thread is connected on standard metering pin, the other end is connected on metering pin tie rod.Method comprises: two thread grooves at least two standard metering pins being put into measured workpiece, compresses with measurer block, and adjustment bracing or strutting arrangement makes measurer block level, and make radial gag lever post, axial limiting pole pair measurer block carries out radial and axial spacing; Rotate measured workpiece until one week, the maximum difference value of clock gauge is the coaxiality error of screw thread.Site Detection of the present invention is convenient, accurately and reliably.
Description
Technical field
The present invention relates to a kind of Form and position error pick-up unit and measuring method of part, especially relate to a kind of pick-up unit and measuring method of external thread right alignment.
Background technology
Apply a large amount of bolt connections in mechanical part, and for the high-strength bolt in some important spare parts, in order to avoid causing the internal stress of screw thread to increase in assembling process, General Requirements screw thread is higher relative to the right alignment of common centreline.Such as, the coupling bolt of the built-up piston in highly-intensified diesel engine, the coaxiality error of threaded portion is less than 0.02mm.Thread coaxiality tolerance refers to the parallel and droop error of the central diameter center line of screw thread and reference center's line.If this error is excessive, after causing assembling, the internal stress of bolt threaded portions increases, and this is one of reason of some bolt threads fracture.
The central diameter axis of screw thread is referred to, so be all the difficult point that bolt manufacturing detects all the time just because of thread coaxiality.Although also there is the correlation technique detecting external thread right alignment at present, general all for screw thread checking device, this needs special device, special clock gauge etc., is not suitable for on-the-spot detection.Therefore, the right alignment for bolt in production run does not generally detect, and just ensures by machining process.This just causes a blind area in bolt manufacture, namely directly cannot evaluate the quality of technique.
Summary of the invention
It is convenient that the first object of the present invention is to provide a kind of Site Detection, external thread coaxality measuring mechanism accurately and reliably.
It is convenient that the second object of the present invention is to provide a kind of Site Detection, external thread method for measuring coaxiality accurately and reliably.
In order to reach above-mentioned first object, technical scheme of the present invention is: a kind of external thread coaxality measuring mechanism, comprise clock gauge, measurer block, standard metering pin, stop means, bracing or strutting arrangement and pedestal, described measurer block has upper surface and lower surface, described standard metering pin is at least two, stop means and bracing or strutting arrangement are all fixed on pedestal, described stop means comprises radial gag lever post, axial limiting bar, metering pin tie rod and silk thread, described radial gag lever post, axial limiting bar lays respectively at by the other and side of an end face of measurer block, described metering pin tie rod is positioned at by the other end of measurer block, one end of described silk thread is connected on standard metering pin, the other end is connected on metering pin tie rod, during detection, the gauge head of described clock gauge contacts with the upper surface of measurer block, described standard metering pin contacts with a place of the lower surface of measurer block, another place of the lower surface of described bracing or strutting arrangement and measurer block offsets.
Upper surface and the lower surface of described measurer block are parallel to each other.
Described bracing or strutting arrangement comprises spherical head and threaded bar portion.
It is spherical bar and the pole socket with bar threaded engagement that the radial gag lever post of described stop means, axial limiting bar include head.
In order to reach above-mentioned second object, technical scheme of the present invention is: a kind of external thread method for measuring coaxiality adopting above-mentioned external thread coaxality measuring mechanism, comprises the following steps:
A, two of lathe or testing table two ends are utilized coaxial toply to head in the respective central holes at measured workpiece two ends, then the other one end of the silk thread be connected on standard metering pin is fixed on metering pin tie rod, again two standard metering pins are put into respectively two thread grooves of the thread segment of measured workpiece, and compress standard metering pin with measurer block, adjust bracing or strutting arrangement simultaneously and make measurer block level, and make radial gag lever post, axial limiting pole pair measurer block carries out radial and axial spacing;
The initial indicating value of b, the position of adjusting clock gauge and dial plate, rotates measured workpiece to 60 ° ~ 90 °, then unclamps the silk thread being fixed on metering pin tension rod end, keep measured workpiece motionless, write down the indicated value of now clock gauge;
C, the axial location of adjustment standard metering pin in thread groove, be in thread groove to make the detecting portion of standard metering pin, with the position of adjustment measurer block, to make measurer block level and standard metering pin can be compressed, again silk thread is fixed on metering pin tie rod, rotates measured workpiece to 60 ° ~ 90 °, then unclamp the silk thread being fixed on metering pin tension rod end, keep measured workpiece motionless, write down the indicated value of now clock gauge;
D, repetition step c, until measured workpiece rotates one week, in this process, the maximum difference value of clock gauge, is the coaxiality error of screw thread.
In a step, described radial gag lever post, between axial limiting bar and measurer block, leave certain gap, not easily tilt when mobile to make measurer block.
In step c, the position be fixed on by silk thread on metering pin tie rod should with measured workpiece on same level height, and must make silk thread be in relaxed state.
The thread groove of measured workpiece (such as coupling bolt) put into by standard metering pin by the present invention when measuring, contact point is just on middle line.When measurer block is pressed on the metering pin putting into thread groove, the lower surface of measurer block and the top contact of standard metering pin.Because of the line of contact point and the central diameter of this thread segment parallel, so the effect of standard metering pin is equivalent to pitch diameter of thread position translation on the upper surface of measurer block.When measured workpiece rotates one week between two is top, read the maximum difference value of the clock gauge of measurer block upper surface, just represent the coaxiality error of this thread segment.Measurer block in the present invention has certain deadweight, can compress standard metering pin.And the standard metering pin putting into thread groove is movable, when workpiece rotates between top, when standard metering pin moves along helix together with measurer block, standard metering pin can regulate the contact position with thread groove automatically.The present invention is simple, convenient, accurately and reliably, is particularly suitable for the Site Detection in workshop, effectively can verify the reliability of bolt processing technic featuring.
Accompanying drawing explanation
The present invention is further detailed explanation for the embodiment provided below in conjunction with accompanying drawing.
Fig. 1 is the working state figure of external thread coaxality measuring mechanism of the present invention;
Fig. 2 is the plan view of Fig. 1;
Fig. 3 is the left view of Fig. 1;
Fig. 4 is the D place enlarged drawing of Fig. 1;
Fig. 5 is measuring principle schematic diagram of the present invention.
Embodiment
As Fig. 1, 2, 3, shown in 4, a kind of external thread coaxality measuring mechanism of the present invention, comprises clock gauge 1, measurer block 2, standard metering pin 3, stop means 5, bracing or strutting arrangement 6 and pedestal 7, described measurer block 2 has upper surface 2-1 and lower surface 2-2, and described standard metering pin 3 is at least two, and described stop means 5 and bracing or strutting arrangement 6 are all fixed on pedestal 7, and described stop means 5 comprises radial gag lever post 5-2, axial limiting bar 5-3, metering pin tie rod 5-4 and silk thread 5-1, described radial gag lever post 5-2, axial limiting bar 5-3 lays respectively at by the other and side of an end face of measurer block 2, described metering pin tie rod 5-4 is positioned at by the other end of measurer block 2, one end of described silk thread 5-1 is connected on standard metering pin 3, the other end is connected on metering pin tie rod 5-4, during detection, the gauge head of described clock gauge 1 contacts with the upper surface 2-1 of measurer block 2, and described standard metering pin 3 contacts with a place of the lower surface 2-2 of measurer block 2, and described bracing or strutting arrangement 6 offsets with another place of the lower surface 2-2 of measurer block 2.
As shown in Fig. 3,5, upper surface 2-1 and the lower surface 2-2 of described measurer block 2 are parallel to each other, to reduce metrical error.
As shown in Figure 3, described bracing or strutting arrangement 6 comprises spherical head 6-1 and threaded bar portion 6-2.The lower surface that can ensure bracing or strutting arrangement and measurer block when detecting like this is point cantact, and avoid measurer block that tilting phenomenon occurs, adjustable length is the detection in order to adapt to different size workpiece.
As shown in Figure 2,3, radial gag lever post 5-2, the axial limiting bar 5-3 of described stop means 5 include head is spherical bar 5-2-1,5-3-1 and pole socket 5-2-2,5-3-2 with bar 5-2-1,5-3-1 threaded engagement.The side that can ensure stop means and measurer block when detecting like this is point cantact, and avoid measurer block that tilting phenomenon occurs, adjustable length is the detection in order to adapt to different size workpiece.
As shown in Fig. 1,2,3,4,5, standard metering pin 3 utilizes to measure the pitch diameter of thread with two in three pins piece, and the diameter of standard metering pin 3 is chosen by standard with pitch.Measurer block 2 should have enough length, so that support; Measurer block 2 should have certain weight, can compress standard metering pin 3 when freely placing.When silk thread 5-1 ensures to detect, standard metering pin 3 does not come off.
As shown in Fig. 1,2,3,4,5, measurement mechanism of the present invention, when measuring, can utilize the top of lathe two ends to head in the respective central holes of measured workpiece (coupling bolt) 4.First can beating first with hole, clock gauge 1 inspection center and shaft.Then two standard metering pins 3 are put into respectively two thread grooves of the thread segment of measured workpiece 4, when one end of measurer block 2 is pressed in the standard metering pin 3 putting into thread groove, the lower surface 2-2 of measurer block 2 and standard metering pin 3 A, B two place contact, because the line of contact point A, B is parallel with the AB section pitch diameter of thread, so the effect of measurer block 2 is equivalent to pitch diameter of thread position translation on the upper surface 2-1 of measurer block 2.The other end of measurer block 2 is with the push rod 5-1 jack-up of supporting and limiting device 5 of adjusting height, radial and axial of measurer block 2 radial direction by supporting and limiting device 5,5-2,5-3 are spacing for axial limiting bar, and make the bulb of gag lever post and gauge block leave suitable gap, be unlikely to make it tilt to adapt to moving of measurer block 2.Clock gauge 1 is moved to the upper surface 2-1 of measurer block 2, rotate top between workpiece 4 one weeks, the maximum difference value of clock gauge 1, is the coaxiality error of this thread segment.
When detecting beginning, adjust position and the dial plate data of clock gauge 1, then standard metering pin 3 is linked on the metering pin tie rod 5-4 of supporting and limiting device 5 by silk thread, and make silk thread be in relaxed state.In the process of rotating measured workpiece, standard metering pin 3 can move along thread groove, and silk thread 5-1 is strained.Now stop operating workpiece, unclamps silk thread 5-1, writes down the indicated value of clock gauge 1.Readjust the axial location of standard metering pin 3 in thread groove, and the position of adjustment measurer block 2, to make measurer block 2 level and standard metering pin 3 can be compressed, repeat previous step, until workpiece rotates one week.The maximum difference value (difference of maximum indicated value and minimum indicated value) of clock gauge in this process, is the coaxiality error (the central diameter center line of screw thread and the parallel and droop error of reference center's line) of screw thread.
The position of at every turn unclamping silk thread 5-1, adjustment standard metering pin 3 and the measurer block 2 be tightened up is detected again again, be in order to ensure standard metering pin 3 can be entirely true in the process detected be in thread groove, and guarantee that each moment of measurer block 2 can compress standard metering pin 3.
The angle of each turning of work piece is determined by the length in reserve of the specification of workpiece and standard metering pin 3, and when ensureing to read value, the detection position of standard metering pin 3 is in thread groove at every turn.
Because the angle of turning of work piece is different, the moving direction of standard metering pin 3 and measurer block 2 is also different.In order to adapt to different turning to, radial gag lever post and axial limiting bar can be made spacing on four sides, metering pin tie rod 5-4 can make the rod member drawing, push up one.
As shown in Fig. 1,2,3,4,5, a kind of external thread method for measuring coaxiality adopting above-mentioned external thread coaxality measuring mechanism of the present invention, comprises the following steps:
A, two of lathe or testing table two ends are utilized coaxial toply to head in the respective central holes at measured workpiece 4 two ends, then the other one end of the silk thread 5-1 be connected on standard metering pin 3 is fixed on metering pin tie rod 5-4, again two standard metering pins 3 are put into respectively two thread grooves of the thread segment of measured workpiece 4, and compress standard metering pin 3 with measurer block 2, adjust bracing or strutting arrangement 6 simultaneously and make measurer block 2 level, and make radial gag lever post 5-2, axial limiting bar 5-3 carries out radial and axial spacing to measurer block 2;
The initial indicating value of b, the position of adjusting clock gauge 1 and dial plate, rotates measured workpiece 4 to 60 ° ~ 90 °, then unclamps the silk thread 5-1 being fixed on metering pin tie rod 5-4 and holding, and keeps measured workpiece 4 motionless, writes down the indicated value of now clock gauge 1;
C, the axial location of adjustment standard metering pin 3 in thread groove, be in thread groove to make the detecting portion of standard metering pin 3, with the position of adjustment measurer block 2, to make measurer block 2 level and standard metering pin 3 can be compressed, again silk thread 5-1 is fixed on metering pin tie rod 5-4, rotates measured workpiece 4 to 60 ° ~ 90 °, then unclamp the silk thread 5-1 being fixed on metering pin tie rod 5-4 and holding, keep measured workpiece 4 motionless, write down the indicated value of now clock gauge 1;
D, repetition step c, until measured workpiece 4 rotates one week, the maximum difference value (difference of maximum indicated value and minimum indicated value) of clock gauge 1 in this process, is the coaxiality error (the central diameter center line of screw thread and the parallel and droop error of reference center's line) of screw thread.
As shown in Figure 1, 2, 3, in a step, described radial gag lever post 5-2, between axial limiting bar 5-3 and measurer block 2, leave certain gap, not easily tilt when mobile to make measurer block 2.
In b, step c, the angle of each rotation measured workpiece 4 is generally 60 ° ~ 90 °, can ensureing that the detecting portion moment of process Plays metering pin rotating all is in thread groove like this, also not easily making the silk thread of connection standard metering pin strain simultaneously and causing standard metering pin and misplace in thread groove.
In step c, the position be fixed on by silk thread 5-1 on metering pin tie rod 5-4 should with measured workpiece 4 on same level height, and must make silk thread 5-1 be in relaxed state.
Claims (7)
1. an external thread coaxality measuring mechanism, it is characterized in that: comprise clock gauge (1), measurer block (2), standard metering pin (3), stop means (5), bracing or strutting arrangement (6) and pedestal (7), described measurer block (2) has upper surface (2-1) and lower surface (2-2), described standard metering pin (3) is at least two, stop means (5) and bracing or strutting arrangement (6) are all fixed on pedestal (7), described stop means (5) comprises radial gag lever post (5-2), axial limiting bar (5-3), metering pin tie rod (5-4) and silk thread (5-1), described radial gag lever post (5-2), axial limiting bar (5-3) lays respectively at by the other and side of an end face of measurer block (2), described metering pin tie rod (5-4) is positioned at by the other end of measurer block (2), one end of described silk thread (5-1) is connected on standard metering pin (3), the other end is connected on metering pin tie rod (5-4), during detection, the gauge head of described clock gauge (1) contacts with the upper surface (2-1) of measurer block (2), described standard metering pin (3) contacts with a place of the lower surface (2-2) of measurer block (2), described bracing or strutting arrangement (6) offsets with another place of the lower surface (2-2) of measurer block (2).
2. external thread coaxality measuring mechanism according to claim 1, is characterized in that: upper surface (2-1) and the lower surface (2-2) of described measurer block (2) are parallel to each other.
3. external thread coaxality measuring mechanism according to claim 1, is characterized in that: described bracing or strutting arrangement (6) comprises spherical head (6-1) and threaded bar portion (6-2).
4. external thread coaxality measuring mechanism according to claim 1, is characterized in that: it is spherical bar (5-2-1,5-3-1) and the pole socket (5-2-2,5-3-2) with bar (5-2-1,5-3-1) threaded engagement that the radial gag lever post (5-2) of described stop means (5), axial limiting bar (5-3) include head.
5. adopt an external thread method for measuring coaxiality for one of claim 1 ~ 4 described external thread coaxality measuring mechanism, it is characterized in that: comprise the following steps:
A, two of lathe or testing table two ends are utilized coaxial toply to head in the respective central holes at measured workpiece (4) two ends, then the other one end of the silk thread (5-1) be connected on standard metering pin (3) is fixed on metering pin tie rod (5-4), again two standard metering pins (3) are put into respectively two thread grooves of the thread segment of measured workpiece (4), and compress standard metering pin (3) with measurer block (2), adjust bracing or strutting arrangement (6) simultaneously and make measurer block (2) level, and make radial gag lever post (5-2), axial limiting bar (5-3) carries out radial and axial spacing to measurer block (2),
B, adjust the position of clock gauge (1) and the initial indicating value of dial plate, rotate measured workpiece (4) to 60 ° ~ 90 °, then unclamp the silk thread (5-1) being fixed on metering pin tie rod (5-4) and holding, keep measured workpiece (4) motionless, write down the indicated value of now clock gauge (1);
C, adjustment standard metering pin (3) axial location in thread groove; be in thread groove to make the detecting portion of standard metering pin (3); with the position of adjustment measurer block (2); to make measurer block (2) level and standard metering pin (3) can be compressed; again silk thread (5-1) is fixed on metering pin tie rod (5-4); rotate measured workpiece (4) to 60 ° ~ 90 °; then the silk thread (5-1) being fixed on metering pin tie rod (5-4) and holding is unclamped; keep measured workpiece (4) motionless, write down the indicated value of now clock gauge (1);
D, repetition step c, until measured workpiece (4) rotates one week, in this process, the maximum difference value of clock gauge (1), is the coaxiality error of screw thread.
6. external thread method for measuring coaxiality according to claim 5, it is characterized in that: in a step, described radial gag lever post (5-2), between axial limiting bar (5-3) and measurer block (2), leave certain gap, not easily tilt when mobile to make measurer block (2).
7. external thread method for measuring coaxiality according to claim 5, it is characterized in that: in step c, the position be fixed on by silk thread (5-1) on metering pin tie rod (5-4) should with measured workpiece (4) on same level height, and must make silk thread (5-1) be in relaxed state.
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| CN106289148A (en) * | 2015-06-10 | 2017-01-04 | 致茂电子(苏州)有限公司 | The concentricity detection apparatus of photoelectric subassembly and detection method thereof |
| CN107084658B (en) * | 2017-03-01 | 2019-07-23 | 浙江兆丰机电股份有限公司 | The fine spiral lamination measurement method of outer round surface |
| CN110631538A (en) * | 2019-09-30 | 2019-12-31 | 中国航空工业标准件制造有限责任公司 | Measuring method for perpendicularity of end face |
| CN110906900A (en) * | 2019-11-30 | 2020-03-24 | 中国航空工业标准件制造有限责任公司 | Method for measuring polished rod run-out and end face verticality by taking pitch diameter of threads as reference |
| CN114111690B (en) * | 2021-10-29 | 2024-05-03 | 江苏上汽汽车变速器有限公司 | Method and system for measuring coaxiality and roundness of inferior shell |
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| CN202041165U (en) * | 2011-05-18 | 2011-11-16 | 天合富奥商用车转向器（长春）有限公司 | Special detection device for threaded rolling path coaxiality and bearing rolling path coaxiality of screw of steering device |
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Address after: 213011 Wuyi Road, Jiangsu, Changzhou, No. 258 Patentee after: CRRC QISHUYAN INSTITUTE Co.,Ltd. Address before: 213011 Wuyi Road, Qishuyan District, Jiangsu, China, No. 258, No. Patentee before: CRRC QISHUYAN INSTITUTE Co.,Ltd. |
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| CP02 | Change in the address of a patent holder | ||
| CP03 | Change of name, title or address |
Address after: 213011 258 Wuyi Road, Changzhou, Jiangsu Patentee after: CRRC Qishuyan Locomotive and Rolling Stock Technology Research Institute Co.,Ltd. Country or region after: China Address before: 213011 258 Wuyi Road, Changzhou, Jiangsu Patentee before: CRRC QISHUYAN INSTITUTE Co.,Ltd. Country or region before: China |
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| CP03 | Change of name, title or address |