CN108858056A - A kind of tightening method for preventing rubber gasket fastening bolt torque from decaying - Google Patents
A kind of tightening method for preventing rubber gasket fastening bolt torque from decaying Download PDFInfo
- Publication number
- CN108858056A CN108858056A CN201810846251.XA CN201810846251A CN108858056A CN 108858056 A CN108858056 A CN 108858056A CN 201810846251 A CN201810846251 A CN 201810846251A CN 108858056 A CN108858056 A CN 108858056A
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- CN
- China
- Prior art keywords
- fastening bolt
- torque
- bolt
- rubber gasket
- tightens
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
Abstract
The invention discloses a kind of tightening methods for preventing rubber gasket fastening bolt torque from decaying, which is characterized in that this method comprises the following steps：S1, preload diagonally intersect low speed with small torque and pre-tighten all fastening bolts；S2, make-up carry out diagonal intersection to pre- next fastening bolt using the torque of setting and tighten；S3, it tightens up, upper next a portion fastening bolt is tightened up with the torque of setting again.Bolt Screw Down Method of the invention, it is easy to operate, the buffer time that compressive deformation decays is reserved with to rubber sheet gasket, slow down the time of Bolt Torque decline, and reduce the quantity that bolt loosens, it can effectively avoid the problem of causing bolt to loosen because of rubber gasket elastic characteristic, it is ensured that the leakproofness of part connection prolongs its service life.
Description
Technical field
The present invention relates to engine assembly technical fields, more specifically, it relates to which one kind prevents rubber gasket from fastening
The tightening method of Bolt Torque decaying.
Background technique
During engine assembly, because the loading of rubber gasket is larger, for more difficult control in the fabrication process
The part of flatness processed, roughness generally can all use the connection sealing means of rubber gasket.For using rubber gasket
The fastening bolt of sealing is connected, traditional tightening method is using spanner successively to (three fastenings of all fastening bolts of part
It is more than bolt) it tightens, however actual in application, the next fastening bolt of fit on can be gradually loose over time
De-, for example, engine sump tank fastening bolt is 20, by about 5 hours after test-run a machine after assembly, the decline of fastening bolt torque has
5% bolt loosens, and entrucking has 20% bolt to loosen after operating 100 hours, with the extension of time, the bolt loosened is got over
It is more, this is because the attribute question of rubber gasket itself, so that there is decline seriously in fastening bolt torque, to cause to fasten
The failure that bolt loosens.Especially after rubber gasket is heated, loosen that phenomenon is the most obvious, to cause the connection of part close
Envelope failure.
Summary of the invention
The technical problem to be solved by the present invention is to be directed to the above-mentioned deficiency of the prior art, a kind of easy to operate bolt is provided
Tightening method is reserved with the buffer time that compressive deformation decays to rubber sheet gasket, can avoid due to rubber gasket elastic characteristic
The problem of causing fastening bolt torque to decline and loosen, it is ensured that the leakproofness of part connection prolongs its service life.
The technical scheme is that such：A kind of side of tightening for preventing rubber gasket fastening bolt torque from decaying
Method, this method comprises the following steps：
S1, preload diagonally intersect low speed with small torque and pre-tighten all fastening bolts；
S2, make-up carry out diagonal intersection to pre- next fastening bolt using the torque of setting and tighten；
S3, it tightens up, upper next a portion fastening bolt is tightened up with the torque of setting again.
As a further improvement, the moment values that fastening bolt pre-tightens are not more than work piece in the step S1
Bolt standard assembles the 30% of moment values, and the revolving speed that fastening bolt pre-tightens is 1r/s~4r/s.
Further, in the step S1, the moment values that fastening bolt pre-tightens are the assembly of work piece bolt standard
The 30% of moment values, the revolving speed that fastening bolt pre-tightens are 2r/s.
Further, in the step S2, the torque that fastening bolt tightens is that the standard of work piece bolt is assembled
Moment values.
Further, in the step S3, the moment values that fastening bolt tightens up are not less than the standard of work piece bolt
Assemble moment values.
Further, in the step S3, the moment values that fastening bolt tightens up are that the standard of work piece bolt is assembled
Moment values.
Further, in the step S3, the fastening bolt ratio tightened up is the 30%~50% of bolt sum.
Further, in the step S3, the fastening bolt ratio tightened up is the 40% of bolt sum.
Further, in step S1, S2, the preload of fastening bolt and make-up to tighten sequence identical, and
It is axially to intersect to tighten from the centre of workpiece to both ends.
It further, in the step S3, is answered a part of fastening bolt for being located at position among workpiece
Tightly.
Beneficial effect
Compared with prior art, the present invention having the following advantages that：Bolt Screw Down Method of the invention, it is easy to operate, it uses
The method for first pre-tightening, tightening afterwards, tightening up again tightens rubber gasket fastening bolt, is reserved with compression to rubber sheet gasket and becomes
The buffer time of shape decaying, the time of Bolt Torque decline is slowed down, and reduce the quantity that bolt loosens, can effectively avoid because of rubber
Glue class gasket elastic characteristic and the problem of cause bolt to loosen, it is ensured that the leakproofness of part connection prolongs its service life.
Detailed description of the invention
Fig. 1 is process flow chart of the invention；
Fig. 2 is the operation chart of the invention applied in the assembly of cylinder cover of engine bolt.
Specific embodiment
The present invention is described further for specific embodiment in reference to the accompanying drawing.
Refering to fig. 1, a kind of tightening method for preventing rubber gasket fastening bolt torque from decaying of the invention, feature exist
In this method comprises the following steps：
S1, preload diagonally intersect low speed with small torque and pre-tighten all fastening bolts；
S2, make-up carry out diagonal intersection to pre- next fastening bolt using the torque of setting and tighten；
S3, it tightens up, upper next a portion fastening bolt is tightened up with the torque of setting again.
Specifically, in step sl, the moment values that fastening bolt pre-tightens assemble torque no more than work piece bolt standard
The 30% of value, the revolving speed that fastening bolt pre-tightens are 1r/s~4r/s, it is preferred that in step S1, the moment values of fastening bolt preload
Assemble moment values for work piece bolt standard 30%, the revolving speed that fastening bolt pre-tightens are 2r/s, such as the fastening spiral shell of workpiece
Bolt torque range is 10Nm~24Nm, then the moment values that fastening bolt pre-tightens are 3Nm~8Nm, is mainly prevented
Rubber gasket rapid deformation under the extruding of larger torque, and prevent bolt high-speed rotation from damaging to rubber gasket when preload
Wound, makes the elasticity of rubber gasket have attenuation process；In step s 2, the torque that fastening bolt tightens is work piece bolt
Standard assembles moment values, and pre- next all fastening bolts is made to reach assembly standard requirements；In step s3, fastening bolt is multiple
Tight moment values assemble moment values not less than the standard of work piece bolt, it is preferred that in step S3, power that fastening bolt tightens up
Square value is that the standard of work piece bolt assembles moment values, prevents torque excessive, fastening bolt is caused to be damaged；In step s3,
The fastening bolt ratio tightened up is the 30%~50% of bolt sum, it is preferred that since rubber sheet gasket decrement is larger, bolt exists
When make-up, the torque for tightening part bolt at first is spread on entire part, and the compression ratio of gasket is typically less than 5%, when
Next in whole Bolt Torques, the compression ratio of gasket generally reaches 15%, the part bolt power tightened at first under such circumstances
Square will degradation, so need to the part tightened at first, specifically, in step S3, the fastening bolt ratio tightened up is
The 40% of bolt sum prevents the non-complete attenuation of elasticity of rubber gasket complete.Experimental comparison's data as shown in the following table 1, can
Clearly to obtain, rubber gasket fastening bolt is tightened using the method that the present invention is first pre-tightened, tightens afterwards, tightened up again,
It is reserved with the buffer time that compressive deformation decays to rubber sheet gasket, slows down the time of Bolt Torque decline, and reduces bolt pine
De- quantity can effectively avoid the problem of causing bolt to loosen because of rubber gasket elastic characteristic, it is ensured that part connects close
Feng Xing is prolonged its service life.
Table 1
| T | 5 | 25 | 45 | 65 | 85 | 105 | 125 | 145 | 165 |
| N1 | 5% | 10% | 10% | 15% | 15% | 20% | 20% | 20% | 25% |
| N2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5% | 5% |
Wherein, T is the time through going through after fastening bolt assembly, and when N1 is using traditional tightening method, fastening bolt is loosened
Quantity, when N2 is using tightening method of the invention, quantity that fastening bolt loosens.
As shown in Fig. 2, the cylinder head cover connection of engine is that the components being connected and sealed using rubber gasket are matched
It closes, fastening bolt is tightened using tightening method of the invention, in step S1, S2, the preload of fastening bolt and make-up
It is identical to tighten sequence, and is axially to intersect to tighten from the centre of workpiece to both ends, i.e., serial number 1 in corresponding diagram 2,3,4,5,6,7,
8,9,10,11,12,13,14,15 axially intersect preload to its both ends among cylinder head cover in their order and tighten all spiral shells
Bolt is in step s3 tightened up to being located at a part of fastening bolt at position among workpiece, i.e., to serial number 1 in such as Fig. 2,
2,3,4,5,6 six bolts are tightened up.
What has been described above is only a preferred embodiment of the present invention, it should be pointed out that for those skilled in the art,
Without departing from the structure of the invention, several modifications and improvements can also be made, these all will not influence implementation of the present invention
Effect and patent practicability.
Claims (10)
1. a kind of tightening method for preventing rubber gasket fastening bolt torque from decaying, which is characterized in that this method includes as follows
Step：
S1, preload diagonally intersect low speed with small torque and pre-tighten all fastening bolts；
S2, make-up carry out diagonal intersection to pre- next fastening bolt using the torque of setting and tighten；
S3, it tightens up, upper next a portion fastening bolt is tightened up with the torque of setting again.
2. a kind of tightening method for preventing rubber gasket fastening bolt torque from decaying according to claim 1, feature
It is, in the step S1, the moment values that fastening bolt pre-tightens are no more than work piece bolt standard assembly moment values
30%, the revolving speed that fastening bolt pre-tightens is 1r/s~4r/s.
3. a kind of tightening method for preventing rubber gasket fastening bolt torque from decaying according to claim 2, feature
It is, in the step S1, the moment values that fastening bolt pre-tightens are that work piece bolt standard assembles the 30% of moment values,
The revolving speed that fastening bolt pre-tightens is 2r/s.
4. a kind of tightening method for preventing rubber gasket fastening bolt torque from decaying according to claim 1, feature
It is, in the step S2, the torque that fastening bolt tightens is that the standard of work piece bolt assembles moment values.
5. a kind of tightening method for preventing rubber gasket fastening bolt torque from decaying according to claim 1, feature
It is, in the step S3, the moment values that fastening bolt tightens up assemble moment values not less than the standard of work piece bolt.
6. a kind of tightening method for preventing rubber gasket fastening bolt torque from decaying according to claim 5, feature
It is, in the step S3, the moment values that fastening bolt tightens up are that the standard of work piece bolt assembles moment values.
7. a kind of tightening method for preventing rubber gasket fastening bolt torque from decaying according to claim 1, feature
It is, in the step S3, the fastening bolt ratio tightened up is the 30%~50% of bolt sum.
8. a kind of tightening method for preventing rubber gasket fastening bolt torque from decaying according to claim 7, feature
It is, in the step S3, the fastening bolt ratio tightened up is the 40% of bolt sum.
9. a kind of described in any one of -8 according to claim 1 prevent tightening for rubber gasket fastening bolt torque decaying
Method, which is characterized in that in step S1, S2, the preload of fastening bolt and make-up to tighten sequence identical, and be
Axially intersect from the centre of workpiece to both ends and tightens.
10. a kind of tightening method for preventing rubber gasket fastening bolt torque from decaying according to claim 9, feature
It is, in the step S3, is tightened up to a part of fastening bolt for being located at position among workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810846251.XA CN108858056A (en) | 2018-07-27 | 2018-07-27 | A kind of tightening method for preventing rubber gasket fastening bolt torque from decaying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810846251.XA CN108858056A (en) | 2018-07-27 | 2018-07-27 | A kind of tightening method for preventing rubber gasket fastening bolt torque from decaying |
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| Publication Number | Publication Date |
|---|---|
| CN108858056A true CN108858056A (en) | 2018-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810846251.XA Pending CN108858056A (en) | 2018-07-27 | 2018-07-27 | A kind of tightening method for preventing rubber gasket fastening bolt torque from decaying |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430916A (en) * | 2011-09-16 | 2012-05-02 | 黑龙江建龙钢铁有限公司 | Fastening method for bolt group connection |
| CN102699675A (en) * | 2011-03-28 | 2012-10-03 | 北汽福田汽车股份有限公司 | Wheel tightening method, wheel tightening control device and wheel tightening system |
| CN103100850A (en) * | 2013-01-31 | 2013-05-15 | 东风康明斯发动机有限公司 | Engine connecting rod bolt screwing craft through torque and turn angle |
| CN103921242A (en) * | 2014-04-02 | 2014-07-16 | 广西玉柴机器股份有限公司 | Air cylinder cover bolt screwing process |
| CN106985101A (en) * | 2017-05-12 | 2017-07-28 | 广西玉柴机器股份有限公司 | A kind of engine cylinder cover bolt tightening method |
-
2018
- 2018-07-27 CN CN201810846251.XA patent/CN108858056A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699675A (en) * | 2011-03-28 | 2012-10-03 | 北汽福田汽车股份有限公司 | Wheel tightening method, wheel tightening control device and wheel tightening system |
| CN102430916A (en) * | 2011-09-16 | 2012-05-02 | 黑龙江建龙钢铁有限公司 | Fastening method for bolt group connection |
| CN103100850A (en) * | 2013-01-31 | 2013-05-15 | 东风康明斯发动机有限公司 | Engine connecting rod bolt screwing craft through torque and turn angle |
| CN103921242A (en) * | 2014-04-02 | 2014-07-16 | 广西玉柴机器股份有限公司 | Air cylinder cover bolt screwing process |
| CN103921242B (en) * | 2014-04-02 | 2016-04-13 | 广西玉柴机器股份有限公司 | A kind of cylinder head bolt tightening technique |
| CN106985101A (en) * | 2017-05-12 | 2017-07-28 | 广西玉柴机器股份有限公司 | A kind of engine cylinder cover bolt tightening method |
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Application publication date: 20181123 |