CN102338608A - Checking fixture for measuring axial dimension of crankshaft pin hole and detection method - Google Patents
Checking fixture for measuring axial dimension of crankshaft pin hole and detection method Download PDFInfo
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- CN102338608A CN102338608A CN2011102458379A CN201110245837A CN102338608A CN 102338608 A CN102338608 A CN 102338608A CN 2011102458379 A CN2011102458379 A CN 2011102458379A CN 201110245837 A CN201110245837 A CN 201110245837A CN 102338608 A CN102338608 A CN 102338608A
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Abstract
The invention discloses a checking fixture for measuring the axial dimension of a crankshaft pin hole and a detection method. The checking fixture comprises a length calibration gauge, a gauge stand, a measuring bar and a dial indicator, wherein the length calibration gauge is a half hollow step columnar shape; a pin hole is arranged at the center of the semicircle of the calibration gauge; the gauge stand is formed by an upper gauge stand and a lower gauge stand which are connected into a whole; the lower gauge stand is of a cuboid shape, and an arc groove is arranged at the bottom of the lower gauge stand; the groove approaches the step semicircular shaft neck of the calibration gauge; the central vertical surface of the groove is provided with a through hole which is in interference fit with a columnar locating pin; a convex part of the locating pin in the groove is in clearance fit with the pin hole on the calibration gauge; the measuring bar is rotatably arranged on the middle part of the upper gauge stand through a rotary pin; a measuring end of the measuring bar is connected with the upper gauge stand through a pressure spring; the upper part of the upper gauge stand is provided with a transverse through hole; and the dial indicator passes through the through hole and approaches the tail part of the measuring bar. The checking fixture has a light and simple structure, low cost and high measuring precision; and the detection method is easy and convenient to operate, and has high efficiency and high measuring accuracy.
Description
Technical field
The present invention relates to the bent axle manufacture field, particularly a kind of cubing and detection method of measuring bent axle pin-and-hole axial dimension.
Background technology
There are for example bent axles such as east wind comings product (6CT, 6BT), last bavin product (4V33G, 12979) and Japanese foreign horse E98 of some bent axles bent axle processing aspect; Need on crankshaft front end axle journal cylindrical, process a pin-and-hole; Pin-and-hole also has the axial length requirement except the symmetry requirement is arranged, be not directed against the appliance special for detecting of crankshaft journal surface pin-and-hole axial length dimension at present; The most frequently used measuring method is exactly: bent axle is erected at platform, with the lever indicator height gauge lever gauge head is put in microcephaly's pin-and-hole, the height that finds the height of minimum point in the hole to deduct axial dimension standard station terrace is added the pin-and-hole radius and is got.
This detection method wastes time and energy: 1, troublesome poeration.One side need erect very inconvenience of operation with bent axle with packing ring on platform; Need put in the lever gauge head on the other hand and find minimum point in the hole, find minimum point, operation is very inconvenient.2, accuracy problem.Bent axle need be erect vertically on the one hand, and this will receive the influence of end face, packing ring and platform plane; Must in the hole, find minimum point on the other hand, this is not easy to find exactly, and accuracy receives operating influence big, and accuracy can't guarantee.
Summary of the invention
The objective of the invention is the deficiency to prior art, a kind of cubing and detection method of measuring bent axle pin-and-hole axial dimension is provided, this cubing is simple in structure, cost is low, measuring accuracy is high; Detection method is simple and convenient, and it is high to measure accuracy.
The technical scheme that realizes the object of the invention is:
A kind of cubing of measuring bent axle pin-and-hole axial dimension comprises length calibration rule, gauge stand, measuring staff and dial gauge, and length calibration rule are half hollow ladder cylinder bodily form, is provided with pin-and-hole at calibration rule semicircle center; Gauge stand is connected as a single entity and is formed by last gauge stand, following gauge stand; Following gauge stand is cuboid; Its bottom is provided with circular groove; Groove and calibration rule step semicircle axle journal are abutted against; The central vertical face of groove is provided with through hole and is connected with a cylinder bodily form register pin interference fit, and the pin-and-hole clearance fit on projection and the calibration rule of register pin in groove is carried out axial location to cubing; Measuring staff is arranged on the middle part of gauge stand through the rotatable position of fulcrum post, is connected through stage clip between the measuring junction of measuring staff and the last gauge stand; The top of last gauge stand is provided with cross through hole, and the afterbody that dial gauge passes through hole and measuring staff is abutted against.
To contain tolerance consistent for the diameter of the step of pin hole processing on the diameter of the pin-and-hole step of length calibration rule and the tested bent axle, and it is consistent that the diameter that the length calibration is advised pin bore axis axial dimension benchmark step on the diameter of size datum step and tested bent axle contains tolerance; The big 0.02mm of axle journal radius of the tested bent axle pin-and-hole of the radius ratio of said groove; The diameter of said register pin is than the little 0.02mm of following difference of tested pin-and-hole diameter.
The length of register pin projection is the half the of the tested pin-and-hole fraising degree of depth.
The distance of the sounding rod center line of dial gauge to the gauge head of the distance at fulcrum post center and measuring staff to the fulcrum post center equates.
Last gauge stand between through hole and the fulcrum post is provided with stroke regulating screw, and the afterbody and the measuring staff of screw are abutted against.
Last gauge stand also is provided with the dial gauge holding screw that matches with through hole.
Adopt above-mentioned cubing to detect the method for bent axle pin-and-hole axial dimension, comprise the steps:
(1), the length numerical value of the pin-and-hole axial dimension on calibration rule on the mark calibration rule, be accurate to 2 significant digits;
(2), check and correction cubing dial gauge adjustment pointer indication; Length numerical value with the pin-and-hole axial dimension on the calibration rule is reference value; Reference value adds that by integral part fraction part forms; The rotation dial plate is adjusted into the dial gauge pointer: " 0 " scale deflects into the little lattice identical with the numerical value of fraction part clockwise and counts the place partially, and axial dimension is the numerical value of the integral part of this reference value during this interval scale pointed " 0 " scale;
(3), the following gauge stand of cubing is close to tested pin-and-hole axle journal cylindrical, register pin stretches in the tested pin-and-hole hole;
(4), gauge stand is close to the journal surface of tested bent axle, the gauge head with measuring staff is close to the length standard step surface toward tested pin bore axis;
(5), from the dial gauge reading; Dial gauge change clockwise reading on the occasion of; Changeing reading counterclockwise is negative value, and reading is the fraction part of tested bent axle pin-and-hole axial dimension, and the length value of then tested bent axle pin-and-hole axial dimension is that the integral part of reference value adds the fraction part of reading from dial gauge.
Technical scheme of the present invention is to utilize the lever indicator principle, adopts the mode of check and correction comparison test that length in kind is compared the formula check.The gauge stand formula cubing of lever measuring staff, employing dial gauge contrast reading; Cubing directly is supported on the journal surface of pin hole processing, and the cubing axial location is located at pin-and-hole inner hole wall place, and the lever gauge head is directly measured pin bore axis to the size datum step surface.
Advantage of the present invention is: structure is light and handy simply, cost is low, measuring accuracy is high; Detection method is simple and convenient, efficient, and maximum error is controlled within the 0.02mm, and it is high to measure accuracy.
Description of drawings
Fig. 1 is the structural representation that cubing is not equipped with dial gauge among the embodiment;
Fig. 2 is the right TV structure synoptic diagram behind the equipped dial gauge of the cubing of Fig. 1.
Among the figure, 1. calibration is advised 2. gauge stand 2-1. and is gone up gauge stand 3. register pins 4. fulcrum posts 5. measuring staff stage clip pins 6. measuring staffs 7. gauge stand pins 8. stage clips 9. dial gauges 10. holding screws 11. stroke regulating screws 12. tested bent axle 13. through holes under the gauge stand 2-2..
Embodiment
Below in conjunction with embodiment and accompanying drawing content of the present invention is done to specify further, but be not qualification of the present invention.
Embodiment:
With reference to Fig. 1 Fig. 2, a kind of cubing of measuring bent axle pin-and-hole axial dimension comprises length calibration rule 1, gauge stand 2, measuring staff 6 and dial gauge 9, and length calibration rule 1 are half hollow ladder cylinder bodily form, are provided with pin-and-hole at the calibration 1 semicircle center of advising; Gauge stand 2 is connected as a single entity and is formed by last gauge stand 2-1, following gauge stand 2-2; Following gauge stand 2-2 is cuboid; Its bottom is provided with circular groove; Groove and calibration are advised 1 step semicircle axle journal and are abutted against, and the central vertical face of groove is provided with through hole and is connected with a cylinder bodily form register pin 3 interference fit, projection and pin-and-hole clearance fit calibration rule 1 on of register pin 3 in groove; Measuring staff 3 is through the rotatable middle parts that are arranged on gauge stand 2-1 of fulcrum post 4, is connected through stage clip 8 between the measuring junction of measuring staff 6 and the last gauge stand 2-1; The top of last gauge stand 2-1 is provided with cross through hole 13, and the afterbody that dial gauge 9 passes through hole 13 and measuring staff 6 is abutted against.
The two ends of stage clip 8 are fixing with measuring staff stage clip pin 5 through gauge stand pin 7 respectively.
To contain tolerance consistent for the diameter of the step of pin hole processing on the diameter of the pin-and-hole step of length calibration rule 1 and the tested bent axle 12, and it is consistent that the diameter that the length calibration is advised 1 pin bore axis axial dimension benchmark step on the diameter of size datum step and tested bent axle 12 contains tolerance; The big 0.02mm of axle journal radius of tested bent axle 12 pin-and-holes of the radius ratio of said groove; The diameter of said register pin 3 is than the little 0.02mm of following difference of tested pin-and-hole diameter.
The axial location position of this cubing is arranged on the pin-and-hole inwall, and the shaped design of cubing axial location becomes the cylindrical register pin 3 consistent with pin-and-hole for this reason; Navigate to hole wall in the pin-and-hole in order to guarantee that register pin 3 can stretch into smoothly, the diameter design of cylindrical register pin 3 is than the little 0.02mm of difference under the pin-and-hole diameter.
Register pin 3 is installed in down in the dowel hole of gauge stand 2-2; The upper surface of register pin 3 is installed level with following gauge stand 2-2 upper surface; Protrusion amount at the circular groove place is controlled by the length overall of register pin 3, and the protrusion amount of register pin 3 at the circular groove place is exactly the assurance of the amount of stretching in pin-and-hole.
The length of register pin 3 projections is the half the of the tested pin-and-hole fraising degree of depth.
The distance of the sounding rod center line of dial gauge 9 to the gauge head of the distance at fulcrum post 4 centers and measuring staff 6 to fulcrum post 4 centers equates.
Last gauge stand 2-1 between through hole 13 and the fulcrum post 4 is provided with stroke regulating screw 11, and the afterbody of stroke regulating screw 11 and measuring staff 6 are abutted against, and the cubing gauge head is remained in certain rational detection stroke.Gauge head was adjusted forward when set screw held out against measuring staff 6 afterbodys backward, on the contrary just adjustment backward of gauge head when set screw is left measuring staff 6 afterbodys forward.
Last gauge stand 2-1 also is provided with the dial gauge holding screw 10 that matches with through hole 13, and holding screw 10 is a hexagon socket cap head screw.
Adopt above-mentioned cubing to detect the method for bent axle pin-and-hole axial dimension, comprise the steps:
(1), the length numerical value of the pin-and-hole axial dimension on mark calibration rule on the calibration rule 1, be accurate to 2 significant digits;
(2), check and correction cubing dial gauge 9 adjustment pointer indications; Length numerical value with pin-and-hole axial dimension on the calibration rule 1 is reference value; Reference value adds that by integral part fraction part forms; The rotation dial plate is adjusted into dial gauge 9 pointers: " 0 " scale deflects into the little lattice identical with the numerical value of fraction part clockwise and counts the place partially, and axial dimension is the numerical value of the integral part of this reference value during this interval scale pointed " 0 " scale, and for example calibration rule are gone up pin bore axis to being of a size of 20.12mm; The rotation dial plate is adjusted into the dial gauge pointer: inclined to one side " 0 " scale clockwise 12 little lattice places, and axial dimension is 20mm during this interval scale pointed " 0 " scale;
(3), the following gauge stand 2-2 of cubing is close to tested pin-and-hole axle journal cylindrical, register pin 3 stretches in the tested pin-and-hole hole;
(4), gauge stand is close to the journal surface of tested bent axle 12, the gauge head with measuring staff 6 is close to the length standard step surface toward tested pin bore axis;
(5), from dial gauge 9 readings; Dial gauge 9 change clockwise readings be on the occasion of; Changeing reading counterclockwise is negative value, and reading is the fraction part of tested bent axle 12 pin-and-hole axial dimensions, and the length value of then tested bent axle 12 pin-and-hole axial dimensions is that the integral part of reference value adds the fraction part of reading from dial gauge 9; For example pressing " 0 " scale is 20mm; Pointer is at inclined to one side " 0 " scale counterclockwise 5 little lattice places, and this moment, reading was 20-0.05=19.95mm, and then 19.95mm is the length value of tested bent axle 12 pin-and-hole axial dimensions.
Can get the relative travel that dial gauge 9 pointer path increments are exactly the actual axial length of pin-and-hole on the relative calibration rule 1 of measuring staff 6 gauge heads by lever principle.
Claims (6)
1. cubing of measuring bent axle pin-and-hole axial dimension is characterized in that: comprise length calibration rule, gauge stand, measuring staff and dial gauge, length calibration rule are half hollow ladder cylinder bodily form, are provided with pin-and-hole at calibration rule semicircle center; Gauge stand is connected as a single entity and is formed by last gauge stand, following gauge stand; Following gauge stand is cuboid; Its bottom is provided with circular groove; Groove and calibration rule step semicircle axle journal is abutted against, and the central vertical face of groove is provided with through hole and is connected with a cylinder bodily form register pin interference fit, the pin-and-hole clearance fit that projection and the calibration of register pin in groove advised; Measuring staff is through the rotatable middle part that is arranged on gauge stand of fulcrum post, is connected through stage clip between the measuring junction of measuring staff and the last gauge stand; The top of last gauge stand is provided with cross through hole, and the afterbody that dial gauge passes through hole and measuring staff is abutted against.
2. cubing according to claim 1 is characterized in that: the length of register pin projection is the half the of the tested pin-and-hole fraising degree of depth.
3. cubing according to claim 1 is characterized in that: the distance of the sounding rod center line of dial gauge to the gauge head of the distance at fulcrum post center and measuring staff to the fulcrum post center equates.
4. cubing according to claim 1 is characterized in that: the last gauge stand between through hole and the fulcrum post is provided with stroke regulating screw, and the afterbody and the measuring staff of screw are abutted against.
5. cubing according to claim 1 is characterized in that: go up gauge stand and also be provided with the dial gauge holding screw that matches with through hole.
6. a method that adopts the described cubing of claim 1-5 to detect bent axle pin-and-hole axial dimension is characterized in that: comprise the steps:
(1), the length numerical value of the pin-and-hole axial dimension on calibration rule on the mark calibration rule, be accurate to 2 significant digits;
(2), check and correction cubing dial gauge adjustment pointer indication; Length numerical value with the pin-and-hole axial dimension on the calibration rule is reference value; Reference value adds that by integral part fraction part forms; The rotation dial plate is adjusted into the dial gauge pointer: " 0 " scale deflects into the little lattice identical with the numerical value of fraction part clockwise and counts the place partially, and axial dimension is the numerical value of the integral part of this reference value during this interval scale pointed " 0 " scale;
(3), the following gauge stand of cubing is close to tested pin-and-hole axle journal cylindrical, register pin stretches in the tested pin-and-hole hole;
(4), gauge stand is close to the journal surface of tested bent axle, the gauge head with measuring staff is close to the length standard step surface toward tested pin bore axis;
(5), from the dial gauge reading; Dial gauge change clockwise reading on the occasion of; Changeing reading counterclockwise is negative value, and reading is the fraction part of tested bent axle pin-and-hole axial dimension, and the length value of then tested bent axle pin-and-hole axial dimension is that the integral part of reference value adds the fraction part of reading from dial gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110245837 CN102338608B (en) | 2011-08-25 | 2011-08-25 | Checking fixture for measuring axial dimension of crankshaft pin hole and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110245837 CN102338608B (en) | 2011-08-25 | 2011-08-25 | Checking fixture for measuring axial dimension of crankshaft pin hole and detection method |
Publications (2)
| Publication Number | Publication Date |
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| CN102338608A true CN102338608A (en) | 2012-02-01 |
| CN102338608B CN102338608B (en) | 2013-05-29 |
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| CN 201110245837 Active CN102338608B (en) | 2011-08-25 | 2011-08-25 | Checking fixture for measuring axial dimension of crankshaft pin hole and detection method |
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| CN109883286A (en) * | 2019-04-09 | 2019-06-14 | 盛瑞传动股份有限公司 | A kind of axial dimension measurement cubing |
| CN110823066A (en) * | 2019-11-05 | 2020-02-21 | 中国航发沈阳黎明航空发动机有限责任公司 | Inner cavity diameter detection device and method |
| CN110823066B (en) * | 2019-11-05 | 2021-07-20 | 中国航发沈阳黎明航空发动机有限责任公司 | Inner cavity diameter detection device and method |
| CN112945161A (en) * | 2019-12-11 | 2021-06-11 | 中国航发商用航空发动机有限责任公司 | Detection apparatus for dark chamber hole part installation quality |
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| CN112484613B (en) * | 2020-11-30 | 2023-02-28 | 北京航星机器制造有限公司 | Coaxiality and symmetry detection method |
| CN115077333A (en) * | 2022-06-15 | 2022-09-20 | 益阳康益机械发展有限公司 | Large-size precision measurement gauge and measurement method |
| CN114894062A (en) * | 2022-06-29 | 2022-08-12 | 中国航发动力股份有限公司 | Detection device and method for journal blade assembly hole |
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