CN108387159A - A kind of connecting-rod bolts elongation measuring device and measuring method - Google Patents
A kind of connecting-rod bolts elongation measuring device and measuring method Download PDFInfo
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- CN108387159A CN108387159A CN201810445438.9A CN201810445438A CN108387159A CN 108387159 A CN108387159 A CN 108387159A CN 201810445438 A CN201810445438 A CN 201810445438A CN 108387159 A CN108387159 A CN 108387159A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 43
- 230000000694 effects Effects 0.000 claims abstract description 38
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 125000006850 spacer group Chemical group 0.000 claims description 10
- 238000013019 agitation Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 11
- 238000002604 ultrasonography Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007781 pre-processing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/003—Measuring of motor parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The present invention provides a kind of connecting-rod bolts elongation measuring device and measuring method, including cubing ontology, amesdial, and the cubing ontology is U-shaped structure comprising horizontal segment and opposite left and right vertical section, left and right vertical section pass through the horizontal segment integrally connected；Corresponding fixed test pin and activity detection pin are respectively equipped on the opposite inner wall of left and right vertical section；The amesdial is fixedly mounted on by a screw on the outer wall of right vertical section, and amesdial contact contradicts connection to measure connecting-rod bolts length with the one end of the activity detection pin far from fixed test pin；Periphery of the activity detection pin close to amesdial side has radially raised shifting block, in right vertical section front along activity detection axis pin to offering sliding slot, the sliding slot is communicated with the through-hole, and the shifting block is slidably matched with the sliding slot, and shifting block is connect with a shifting fork mechanism.Structure of the invention is exquisite, can directly be used at engine assembly scene, accuracy of detection is high, and measuring speed is fast.
Description
Technical field
The present invention relates to a kind of field of measuring technique, specially a kind of connecting-rod bolts elongation measuring device and measurement side
Method.
Background technology
Engine connecting rod structure gonnecting rod body A, connecting rod cap B and connecting-rod bolts C as shown in Figure 1, be mainly made of.Gonnecting rod body A
It is linked together by connecting-rod bolts C with connecting rod cap B, critical piece of the connecting rod as connection crankshaft and piston works as high engine speeds
When operating, connecting rod will bear larger reciprocal load, connecting rod bear the gas load that piston pin transmits and itself swing and
The size and Orientation of the effect of piston group reciprocal inertia force, these power is all periodically variable, and for intensity, connecting rod is hair
Most weak position in motivation, its damage will lead to the major accident of entire engine.Therefore, in engine actual motion
In, particularly important to the control of elongations of the connecting-rod bolts C in rundown process, elongation is excessive so that bolt material is reached
Yield limit makes bolt generate permanent deformation, and elongation is too small, and making connecting rod cap B, there may be releases in operation.Therefore, must
The elongation that must accurately determine connecting-rod bolts, must determine the elongation of bolt while determining screw-down torque.It is big at present
Horsepower connecting-rod bolts are in assembly, it is desirable that within the bolt elongate consistent length to 0.1mm after assembling.
There are two types of the widespread practices of connecting-rod bolts elongation detection at present：
A) it is detected using outside micrometer.The disadvantage is that：Before connecting-rod bolts assembly need that connecting-rod bolts end face is pre-machined, it is no
Then measurement result is inaccurate；Narrow space after connecting-rod bolts are assembled on engine, can not detect.
B) ultrasound examination is used.The disadvantage is that：The shortcomings that ultrasound examination is that bolt both ends of the surface are required with high, high-power company
Bar bolt both ends of the surface have preprocessing centre hole, and end face is uneven, and Data Detection is inaccurate, and product quality cannot ensure.
Invention content
For the defects in the prior art, the present invention provides a kind of connecting-rod bolts elongation measuring device and measuring method,
Its high certainty of measurement, detection speed be fast, delicate structure, can be in the directly use of engine assembly scene.
Technical solution of the present invention is as follows：
A kind of connecting-rod bolts elongation measuring device, including cubing ontology, amesdial, key are：The cubing sheet
Body is U-shaped structure comprising horizontal segment and opposite left and right vertical section, left and right vertical section pass through the horizontal segment integrally connected；
Corresponding fixed test pin and activity detection pin are respectively equipped on the opposite inner wall of left and right vertical section, in the inner wall of left vertical section
On be provided with blind hole, perforative through-hole is provided on the inner wall of right vertical section, the fixed test pin is fixedly mounted on the blind hole
Interior, the activity detection pin clearance fit is in the through-hole；The amesdial is fixedly mounted on right vertical section by a screw
Outer wall on, the one end of amesdial contact and the activity detection pin far from fixed test pin, which contradicts, to be connected；The activity detection
Periphery of the pin close to fixed test pin side has shelves disk, is equipped between this grade of disk and the right vertical section inner wall and resets bullet
Spring；Periphery of the activity detection pin close to amesdial side has radially raised shifting block, on right vertical section front edge
To sliding slot is offered, which communicates activity detection axis pin with the through-hole, and the shifting block is slidably matched with the sliding slot, and dials
Block is connect with a shifting fork mechanism, and shifting fork mechanism drives the activity detection pin to slide axially along the through-hole.
Preferably, the shifting fork mechanism includes shift fork, shift fork spacer, shift fork axis pin, and the shift fork is rotatably coupled to
The right vertical section front；The shift fork spacer is by shifting fork pin axis connection in described shift fork one end, and the shift fork is far from described
The other end of shift fork spacer is open with fork-shaped, and the shifting block is fastened in fork-shaped opening, and shift fork rotation drives activity detection
Pin slides axially along the through-hole.
Preferably, it is set successively there are two coarse positioning pin along horizontal section length direction in the horizontal segment inner wall.
Preferably, the connecting-rod bolts elongation measuring device further includes handle, and the handle is fixedly mounted on the water
Flat section is leaned on the outer wall of right vertical section one end.
Preferably, the amesdial is digital display dial gauge, and band Protection Counter Functions can quickly calculate connecting rod elongation.
A kind of connecting-rod bolts elongation measuring method, it is critical that including the following steps：
1) connecting-rod bolts are tightened manually by technological requirement, will connecting-rod bolts screw in gonnecting rod body bolt hole in, make connecting rod cap and
Connecting rod is bonded, and is just contacted with connecting rod cap with no connecting-rod bolts the brim of a hat face；
2) connecting rod is fitted into measuring device, the side of connecting rod cap is resisted against on coarse positioning pin, by lower shift fork, makes fixed inspection
It surveys pin to be inserted into the centre bore of connecting-rod bolts tail portion, unclamps shift fork, activity detection pin is inserted into connecting rod under the action of resetting spring
In the centre bore of bolt head, gentle agitation device, after amesdial reads no change, it is connecting rod to read amesdial numerical value L1, L1
The original length of bolt；
3) step 2) is repeated, L1 errors are less than 0.001mm；
4) connecting rod is removed, using standard technology as defined in drawing by connecting rod bolt screwing；
5) connecting rod tightened is fitted into measuring device, the side of connecting rod cap is resisted against on coarse positioning pin, by lower shift fork, is made
Fixed test pin is inserted into the centre bore of connecting-rod bolts tail portion, unclamps shift fork, and activity detection pin is inserted under the action of resetting spring
In the centre bore for entering connecting-rod bolts head, gentle agitation device after amesdial reads no change, reads amesdial numerical value L2；
6) step 5) is repeated, L2 errors are less than 0.001mm；
7) according to connecting-rod bolts original length L1 and the length L2 for tightening rear bolt, the elongation Δ of connecting-rod bolts is calculated
L, Δ L=L1-L2.
The beneficial effects of the invention are as follows：
1, structure of the invention is exquisite, can directly be used at engine assembly scene, high certainty of measurement, and detection speed is fast.
Solve narrow space after connecting-rod bolts are assembled on engine, undetectable problem.
2, the present invention fixes connecting rod by coarse positioning pin, fixed test pin and activity detection pin, and connecting rod is measured by amesdial
Bolt tightens front and back length, and then calculates the elongation of connecting-rod bolts, high certainty of measurement.Solve ultrasound examination for
Bolt both ends of the surface require height, and high-power connecting-rod bolts both ends of the surface have preprocessing centre hole, end face uneven, and Data Detection is inaccurate
True problem.
3, using repetition measurement as a result, reducing measurement error, more efficient guarantee connecting-rod bolts assembling quality.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar element
Or part is generally identified by similar reference numeral.In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is the structural schematic diagram of connecting rod ASSY；
Fig. 2 is the structural schematic diagram of the present invention；
Fig. 3 is the schematic diagram that the present invention measures connecting-rod bolts；
In attached drawing：1- cubing ontologies；101- horizontal segments；The left vertical sections of 102-；The right vertical sections of 103-；2- amesdials；3- is solid
Determine test pin；4- activity detection pins；401- grades of disks；5- springs；6- shifting blocks；7- sliding slots；8- shift forks；9- shift fork spacers；10- shift forks
Axis pin；11- handles；12- mounting blocks；13- coarse positioning pins.
Specific implementation mode
The embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
In the present embodiment, the orientation or position of the instructions such as term "upper" "lower" " left side " " right side " " preceding " " rear " " upper end " " lower end "
It is to be based on the orientation or positional relationship shown in the drawings to set relationship, is merely for convenience of describing, not indicate or imply the indicated
Device or element must have a particular orientation, with specific azimuth configuration or operation, therefore should not be understood as to the present invention's
Limitation.
A kind of connecting-rod bolts as shown in Figure 2 extend measuring device, including cubing ontology 1, amesdial 2, the cubing
Ontology 1 is U-shaped structure comprising horizontal segment 101 and opposite left vertical section 102 and right vertical section 103, left and right vertical section
Pass through 101 integrally connected of the horizontal segment.It sets along horizontal section length direction in 101 inner wall of the horizontal segment and determines there are two thick successively
Position pin 13.Corresponding fixed test pin 3 and activity detection pin 4 are respectively equipped on the opposite inner wall of left and right vertical section, it is perpendicular on a left side
It is provided with blind hole on the inner wall of straight section 102, perforative through-hole is provided on the inner wall of right vertical section 4, the fixed test pin 3 is fixed
In the blind hole, 4 clearance fit of activity detection pin is in the through-hole.
The amesdial 2 is digital display dial gauge, is fixedly mounted on by a screw on the outer wall of right vertical section 103, thousand
Divide table contact to contradict with the one end of the activity detection pin 4 far from fixed test pin to connect, to measure connecting-rod bolts length.
The activity detection pin 4 close to fixed test pin side periphery have shelves disk 401, this grade of disk 401 with it is described
Resetting spring 5 is equipped between 103 inner wall of right vertical section.Periphery of the activity detection pin 4 close to 2 side of amesdial has edge
The shifting block 6 of radial protrusion axially offers sliding slot 7 in 103 front of right vertical section along activity detection pin 4, which leads to described
Hole communicates, and the shifting block 6 is slidably matched with the sliding slot 7.
The shifting block 6 is connect with a shifting fork mechanism, and the shifting fork mechanism includes shift fork 8, shift fork spacer 9, shift fork axis pin 10,
The shift fork 8 is rotatably coupled to 103 front of the right vertical section.The shift fork spacer 9 is connected to by shift fork axis pin 10
8 one end of the shift fork, the other end of the shift fork 8 far from the shift fork spacer 9 are open with fork-shaped, and the shifting block 6 is fastened on
In fork-shaped opening, the rotation of shift fork 8 drives activity detection pin 4 to slide axially along through-hole.
The connecting-rod bolts elongation measuring device further includes handle 11, and the handle 11 is fixedly mounted on the horizontal segment
101 lean on the outer wall of 103 one end of right vertical section.Specifically, the handle 11 is fixedly connected on a mounting blocks by a screw
On 12, then mounting blocks 12 are fixedly mounted on horizontal segment 101 entirely through multiple positioning pins with handle 11 and are leaned on into right vertical section
On the outer wall of 103 one end.
A kind of connecting-rod bolts of the present invention extend measuring method, include the following steps：
1) connecting-rod bolts are tightened manually by technological requirement, and connecting-rod bolts C is screwed in gonnecting rod body A bolts hole, connecting rod cap B is made
It is bonded with connecting rod A, is just contacted with connecting rod cap with no connecting-rod bolts the brim of a hat face；
2) connecting rod is fitted into as shown in Figure 3 in measuring device, the side of connecting rod cap B is resisted against on coarse positioning pin 13, is pressed
Shift fork makes fixed test pin 3 be inserted into the centre bore of connecting-rod bolts tail portion, unclamps shift fork, activity detection pin is in resetting spring
Effect is lower to be inserted into the centre bore on connecting-rod bolts head, and gentle agitation device after amesdial reads no change, reads amesdial number
Value L1, L1 are the original length of connecting-rod bolts C；
3) step 2) is repeated, L1 errors are less than 0.001mm；
4) connecting rod is removed, is tightened connecting-rod bolts with regulation technique using defined torque；
5) connecting rod tightened being fitted into as shown in Figure 3 in measuring device, the side of connecting rod cap B is resisted against on coarse positioning pin,
By lower shift fork, fixed test pin is made to be inserted into the centre bore of connecting-rod bolts tail portion, unclamps shift fork, activity detection pin is in resetting spring
Under the action of be inserted into the centre bore on connecting-rod bolts heads, gentle agitation device after amesdial reads no change, reads amesdial
Numerical value L2；
6) step 5) is repeated, L2 errors are less than 0.001mm；
7) according to connecting-rod bolts original length L1 and the length L2 for tightening rear bolt, the elongation of connecting-rod bolts C is calculated
Δ L, Δ L=L1-L2.
The beneficial effects of the invention are as follows：
1, structure of the invention is exquisite, can directly be used at engine assembly scene, high certainty of measurement, and detection speed is fast.
Solve narrow space after connecting-rod bolts are assembled on engine, undetectable problem.
2, the present invention fixes connecting rod by coarse positioning pin, fixed test pin and activity detection pin, and connecting rod is measured by amesdial
Bolt tightens front and back length, and then calculates the elongation of connecting-rod bolts, high certainty of measurement.Ultrasound examination is solved to spiral shell
Bolt both ends of the surface require height, and high-power connecting-rod bolts both ends of the surface have preprocessing centre hole, end face uneven, and Data Detection is inaccurate
The problem of.
3, using repetition measurement as a result, reducing measurement error, more efficient guarantee connecting-rod bolts assembling quality.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of ordinary skill in the art that；It still may be used
To modify to the technical solution recorded in previous embodiment, either which part or all technical features are equal
It replaces；And these modifications or replacements, the model for technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution
It encloses, should all cover in the claim of the present invention and the range of specification.
Claims (6)
1. a kind of connecting-rod bolts extend measuring device, including cubing ontology, amesdial, it is characterised in that：The cubing ontology
For U-shaped structure comprising horizontal segment and opposite left and right vertical section, left and right vertical section pass through the horizontal segment integrally connected；
Corresponding fixed test pin and activity detection pin are respectively equipped on the opposite inner wall of left and right vertical section, on the inner wall of left vertical section
It is provided with blind hole, perforative through-hole is provided on the inner wall of right vertical section, the fixed test pin is fixedly mounted in the blind hole,
The activity detection pin clearance fit is in the through-hole；The amesdial is fixedly mounted on the outer of right vertical section by a screw
On wall, amesdial contact is contradicted with the one end of the activity detection pin far from fixed test pin and is connected；The activity detection pin leans on
The periphery of nearly fixed test pin side has shelves disk, and resetting spring is equipped between this grade of disk and the right vertical section inner wall；Institute
Stating periphery of the activity detection pin close to amesdial side has radially raised shifting block, is examined along activity in right vertical section front
Axis pin is surveyed to sliding slot is offered, which communicates with the through-hole, and the shifting block is slidably matched with the sliding slot, and shifting block and one
Shifting fork mechanism connects, and shifting fork mechanism drives the activity detection pin to slide axially along the through-hole.
2. connecting-rod bolts according to claim 1 extend measuring device, it is characterised in that：The shifting fork mechanism includes dialling
Fork, shift fork spacer, shift fork axis pin, the shift fork are rotatably coupled to the right vertical section front；The shift fork spacer passes through
In described shift fork one end, the other end of the shift fork far from the shift fork spacer is open shifting fork pin axis connection with fork-shaped, described
Shifting block is fastened in fork-shaped opening, and shift fork rotation drives activity detection pin to slide axially along the through-hole.
3. connecting-rod bolts according to claim 1 extend measuring device, it is characterised in that：On horizontal segment inner wall edge
Horizontal section length direction is set successively there are two coarse positioning pin.
4. connecting-rod bolts according to claim 1 extend measuring device, it is characterised in that：Further include handle, described
Hand is fixedly mounted on the horizontal segment and leans on the outer wall of right vertical section one end.
5. connecting-rod bolts according to claim 1 extend measuring device, it is characterised in that：The amesdial is digital display thousand
Divide table.
6. a kind of connecting-rod bolts extend measuring method, which is characterized in that include the following steps：
1) connecting-rod bolts are tightened manually by technological requirement, and connecting-rod bolts are screwed in gonnecting rod body bolt hole, connecting rod cap and connecting rod are made
Fitting, is just contacted with no connecting-rod bolts the brim of a hat face with connecting rod cap；
2) connecting rod is fitted into measuring device, the side of connecting rod cap is resisted against on coarse positioning pin, by lower shift fork, makes fixed test pin
It is inserted into the centre bore of connecting-rod bolts tail portion, unclamps shift fork, activity detection pin is inserted into connecting-rod bolts under the action of resetting spring
In the centre bore on head, gentle agitation device, after amesdial reads no change, it is connecting-rod bolts to read amesdial numerical value L1, L1
Original length；
3) step 2) is repeated, L1 errors are less than 0.001mm；
4) connecting rod is removed, using standard technology as defined in drawing by connecting rod bolt screwing；
5) connecting rod tightened is fitted into measuring device, the side of connecting rod cap is resisted against on coarse positioning pin, by lower shift fork, makes fixation
Test pin is inserted into the centre bore of connecting-rod bolts tail portion, unclamps shift fork, activity detection pin company of insertion under the action of resetting spring
In the centre bore of bar bolt head, gentle agitation device after amesdial reads no change, reads amesdial numerical value L2；
6) step 5) is repeated, L2 errors are less than 0.001mm；
7) according to connecting-rod bolts original length L1 and the length L2 for tightening rear bolt, the elongation Δ L of connecting-rod bolts, Δ are calculated
L=L1-L2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810445438.9A CN108387159A (en) | 2018-05-11 | 2018-05-11 | A kind of connecting-rod bolts elongation measuring device and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810445438.9A CN108387159A (en) | 2018-05-11 | 2018-05-11 | A kind of connecting-rod bolts elongation measuring device and measuring method |
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| Publication Number | Publication Date |
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| CN108387159A true CN108387159A (en) | 2018-08-10 |
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ID=63070916
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810445438.9A Pending CN108387159A (en) | 2018-05-11 | 2018-05-11 | A kind of connecting-rod bolts elongation measuring device and measuring method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109059830A (en) * | 2018-08-28 | 2018-12-21 | 徐工集团工程机械有限公司 | A kind of bolt elongate amount detecting device |
| CN111692946A (en) * | 2020-06-28 | 2020-09-22 | 江苏核电有限公司 | Device and method for measuring elongation of back wheel bolt of steam turbine rotor |
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| CN103487322A (en) * | 2013-09-10 | 2014-01-01 | 广西桂冠开投电力有限责任公司 | Method and tool for measuring extension value of vertically-installed cold-drawn bolt with measurement hole |
| CN204165481U (en) * | 2014-07-28 | 2015-02-18 | 龙工(福建)液压有限公司 | Simple and easy measuring tool for measuring length |
| CN204188105U (en) * | 2014-09-09 | 2015-03-04 | 云南西仪工业股份有限公司 | A kind of instrument measured for connecting-rod bolts elongation |
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| CN109059830A (en) * | 2018-08-28 | 2018-12-21 | 徐工集团工程机械有限公司 | A kind of bolt elongate amount detecting device |
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