CN106985101A - A kind of engine cylinder cover bolt tightening method - Google Patents
A kind of engine cylinder cover bolt tightening method Download PDFInfo
- Publication number
- CN106985101A CN106985101A CN201710333093.3A CN201710333093A CN106985101A CN 106985101 A CN106985101 A CN 106985101A CN 201710333093 A CN201710333093 A CN 201710333093A CN 106985101 A CN106985101 A CN 106985101A
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- China
- Prior art keywords
- nut
- cylinder
- bolt
- spanner
- cylinder bolt
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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
- B25B13/00—Spanners; Wrenches
-
- 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
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
- B25B23/142—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
- B25B23/1422—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a kind of engine cylinder cover bolt tightening method, comprise the following steps：S1, from manometric spanner and setting final moment of torsion；S2, install after cylinder head, using spanner by cylinder bolt pre-screwing to the 50%~75% of its final moment of torsion；S3, nut is screwed on the end of cylinder bolt, then using spanner, nut is tightened to the 100% of its final moment of torsion；S4, using spanner by nut along its tightening direction rotate 60 °~120 °, unclamp torque, inject lubricating fluid；S5, using spanner continue by nut along its tightening direction rotate 60 °~120 °, unclamp torque, inject lubricating fluid；S6, using spanner continue by nut along its tightening direction rotate 30 °~60 °, unclamp torque, inject lubricating fluid；S7, protective cap is pressed on the cylinder bolt above nut.The present invention is easy to operate, effectively prevents cylinder bolt from loosening, it is ensured that the screw thread of cylinder bolt and nut is injury-free, improves the installation accuracy of cylinder block and head.
Description
Technical field
The present invention relates to engine manufacturing technology field, more specifically, it relates to which a kind of engine cylinder bonnet bolt is fastened
Method.
Background technology
During engine production is manufactured, it usually needs cylinder head is arranged on engine cylinder block, Ran Houtong
Cylinder bolt and nut check are crossed in cylinder block.And engine cylinder cap and the reliability of nut connection directly determine engine
Quality, therefore, their non-loosenings and damage must strictly be ensured to the fastening of the cylinder bolt of engine, and vibration strength is high.
At present, the fastening method of the cylinder bolt of engine is generally moment method, and one end of cylinder bolt is directly first tightened in into cylinder
On body, cylinder head installation after, by using spanner twist cylinder bolt nut until nut twist it is motionless untill, this method is to cylinder
The make-up torque of bonnet bolt and nut do not require accurately, often lead to bolt release or torque under fall, simultaneously as in behaviour
During work, torque is all acted on nut from beginning to end, middle torque of not stopping, and easily causes nut and cylinder bolt
Screw thread be damaged so that the problem of causing to dismount difficult in maintenance, also, the continuous action of torque, easily produce machinery heat
Stress, so as to cause screw bolt and nut to deform, destroys the connection precision of bolts and nuts.
The content of the invention
The technical problem to be solved in the present invention be for the above-mentioned not enough there is provided one kind is easy to operate of prior art, it is practical
Property is strong, it is ensured that cylinder bolt and nut connection reliability and balance simultaneously protect the injury-free engine cylinder cover spiral shell of fastening bolt
Bolt fastening method.
The technical scheme is that such：A kind of engine cylinder cover bolt tightening method, including it is pluggable in cylinder
Cylinder bolt with double thread on body and the nut for compressing cylinder head, protection is threaded in the end of cylinder bolt
Cap, comprises the following steps：
S1, selected according to the model of cylinder bolt and nut and carry manometric spanner, and set respectively on pressure gauge
Their final moment of torsion；
Cylinder bolt is screwed in cylinder block by S2, craft, is installed after cylinder head, using spanner that cylinder bolt is pre- stubborn
Tightly to the 50%~75% of its final moment of torsion；
S3, nut is screwed on the end of cylinder bolt, then using spanner, nut is tightened to its final moment of torsion
100%；
S4, using spanner by nut along its tightening direction rotate 60 °~120 °, unclamp torque, and to nut inject lubricate
Liquid is to cylinder bolt and the contact surface of nut；
S5, continue using spanner nut rotating 60 °~120 ° along its tightening direction, unclamp torque, and injected to nut
Lubricating fluid is to cylinder bolt and the contact surface of nut；
S6, using spanner continue by nut along its tightening direction rotate 30 °~60 °, unclamp torque, and to nut inject moisten
Synovia is to cylinder bolt and the contact surface of nut；
S7, protective cap is pressed on the cylinder bolt above nut.
As a further improvement, in described step S2, the pre-fastening moment of cylinder bolt is the 70% of its final moment of torsion.
Further, in described step S3, before nut is tightened, noted to the contact surface between cylinder bolt and nut
Enter lubricating fluid.
Further, in described step S4, nut is 100 °, described step S5 along the angle that its tightening direction rotates
In, nut is 80 ° along the angle that its tightening direction rotates.
Further, in described step S6, nut is 40 ° along the angle that its tightening direction rotates.
Further, in described step S3~S5, each step is tightened after nut, needs to wait for carrying out down again after a period of time
Single stepping.
Further, complete after the step S3, the time of wait is 4 minutes, and after completion step S4, the time of wait is
6 minutes, the time for completing to wait after step S5 was 8 minutes.
Beneficial effect
The present invention compared with prior art, with advantages below：
1st, the present invention sets up screw thread protection cap by the cylinder bolt end in engine, can not only protect cylinder bolt
Screw thread it is injury-free, but also effectively prevent cylinder bolt from loosening, so that it is guaranteed that the installation of engine cylinder block and cylinder head
Precision and connection precision, improve the quality of engine；
2nd, when cylinder bolt of the invention is connected with cylinder block, cylinder bolt and cylinder block are locked by the pulling force of nut
Tightly, it is time saving and energy saving without cylinder bolt is screwed into the 100% of its final moment of torsion, it is easy to operation, it is ensured that cylinder bolt and cylinder
The screw thread of body is injury-free；
3rd, the present invention contributes to the control to torque using being tightened with manometric spanner to cylinder bolt and nut
System, while after bolt is screwed to the 100% of final torque, angle is tightened in three times, reasonably protects cylinder bolt and nut
Screw thread, also, have during tightening injection lubricating oil and the process waited, it is ensured that the screw thread of cylinder bolt and nut
It is injury-free.
Brief description of the drawings
Fig. 1 is operational flowchart of the invention；
Fig. 2 is cylinder bolt mounting structure schematic diagram of the invention；
Fig. 3 is the structure enlarged diagram at A in Fig. 2.
Wherein：1- cylinder block, 2- cylinder bolts, 3- nuts, 4- protective caps.
Embodiment
The present invention is described further for specific embodiment in below in conjunction with the accompanying drawings.
Refering to Fig. 1-3, a kind of engine cylinder cover bolt tightening method of the invention, including it is pluggable in cylinder block 1
Cylinder bolt 2 with double thread and the nut 3 for compressing cylinder head, protective cap is threaded in the end of cylinder bolt 2
4, this method includes tightening cylinder bolt 2 and nut, and the installation to protective cap 4, specifically includes following steps：
S1, selected according to the model of cylinder bolt 2 and nut 3 and carry manometric spanner, and set respectively on pressure gauge
They fixed final moment of torsion, by pressure gauge can application cylider cover bolt 2 and nut 3 in real time torque；
Cylinder bolt 2 is screwed in cylinder block 1 by S2, craft, and then cylinder head is set on cylinder bolt 2, is installed
After aerobic cylinder cap, using spanner by the pre-screwing of cylinder bolt 2 to the 50%~75% of its final moment of torsion, without by cylinder bolt 2
Whole torques have been gone up, it is time saving and energy saving, it is easy to operation, it is ensured that cylinder bolt 2 and the screw thread of cylinder block 1 are injury-free；
S3, nut 3 is screwed on the end of cylinder bolt 2, nut 3 is then screwed to its final moment of torsion using spanner
100%, disposably by complete torque on nut 3；
S4, using spanner by nut 3 along its tightening direction rotate 60 °~120 °, unclamp torque, and to nut 3 inject moisten
Synovia to cylinder bolt 2 and the contact surface of nut 3, the lubricating fluid of addition can reduce the friction between cylinder bolt 2 and nut 3
Power, while being easy to tighten, can also reduce friction temperature therebetween；
S5, continue using spanner nut 3 rotating 60 °~120 ° along its tightening direction, unclamp torque, and to the note of nut 3
Enter lubricating fluid to cylinder bolt 2 and the contact surface of nut 3, add the amount of lubricating fluid than many in step S4, it is possible to decrease cylinder cap spiral shell
Frictional force between bolt 2 and nut 3, while being easy to tighten, can also reduce friction temperature therebetween；
S6, continue using spanner nut 3 rotating 30 °~60 ° along its tightening direction, unclamp torque, and injected to nut 3
Lubricating fluid adds the amount of lubricating fluid than many in step S5, it is possible to decrease cylinder bolt 2 to cylinder bolt 2 and the contact surface of nut 3
With the frictional force between nut 3, while being easy to tighten, friction temperature therebetween can be also reduced；
S7, protective cap 4 is pressed on the cylinder bolt 2 of the top of nut 3, makes protective cap 4 that cylinder bolt 2 is completely covered
End thread, not only can protect the screw thread of cylinder bolt 2 injury-free, but also effectively prevent cylinder bolt 2 from loosening, so that
Ensure the installation accuracy and connection precision of engine cylinder block 1 and cylinder head, improve the quality of engine.
In the above embodiments, in step s 2, the pre-fastening moment of cylinder bolt 2 is the 70% of its final moment of torsion, is passed through
The pulling force of nut 3 locks cylinder bolt 2 with cylinder block 1, is easy to operation.
In step S3, before nut 3 is tightened, lubricating fluid is injected to the contact surface between cylinder bolt 2 and nut 3, just
Rotated in nut 3, make operation more laborsaving, also, after nut 3 is screwed to final moment of torsion, the heat of nut 3 can be greatly reduced
Stress, it is ensured that the screw thread of nut 3 and cylinder bolt 2 is injury-free.
In step S4, during the angle that nut 3 is rotated along its tightening direction is 100 °, step S5, nut 3 is along its tightening direction
The angle of rotation is 80 °, in step S6, and the angle that nut 3 rotate along its tightening direction is 40 °, as nut 3 is constantly tightened,
The difficulty for applying torque is increased, and therefore, the descending rotation of the anglec of rotation, is easy to spanner to exert a force twice, meanwhile, effectively protection
The screw thread of cylinder bolt 2 and nut 3 is injury-free.
In the present embodiment, in step S3~S5, each step is tightened after nut 3, needs to wait for carrying out down again after a period of time
Single stepping, specifically, completing after step S3, the time of wait is 4 minutes, is completed after step S4, and the time of wait is 6 points
Clock, the time for completing to wait after step S5 is 8 minutes, as nut 3 is constantly tightened, the friction between nut 3 and cylinder bolt 2
Power is bigger, and the thermal stress of generation is also more, therefore, the setting of stand-by period from short to long so that thermal stress fully disperses, and has
The screw thread of effect protection cylinder bolt 2 and nut 3 is injury-free.
Above-described is only the 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 are implemented all without the influence present invention
Effect and practical applicability.
Claims (7)
1. a kind of engine cylinder cover bolt tightening method, including the pluggable cylinder cap with double thread in cylinder block (1)
Bolt (2) and the nut (3) for compressing cylinder head, it is characterised in that be threaded protective cap in the end of cylinder bolt (2)
(4), comprise the following steps：
S1, selected according to the model of cylinder bolt (2) and nut (3) and carry manometric spanner, and set respectively on pressure gauge
They fixed final moment of torsion；
S2, cylinder bolt (2) is screwed in cylinder block (1) by hand, installed after cylinder head, using spanner by cylinder bolt
(2) pre-screwing is to the 50%~75% of its final moment of torsion；
S3, nut (3) is screwed on the end of cylinder bolt (2), nut (3) then is screwed into its using spanner final turns round
The 100% of square；
S4, using spanner by nut (3) along its tightening direction rotate 60 °~120 °, unclamp torque, and to nut (3) inject moisten
Synovia to cylinder bolt (2) and nut (3) contact surface；
S5, using spanner continue by nut (3) along its tightening direction rotate 60 °~120 °, unclamp torque, and to nut (3) note
Enter lubricating fluid to cylinder bolt (2) and the contact surface of nut (3)；
S6, using spanner continue by nut (3) along its tightening direction rotate 30 °~60 °, unclamp torque, and to nut (3) inject
Lubricating fluid to cylinder bolt (2) and nut (3) contact surface；
S7, protective cap (4) is pressed on the cylinder bolt (2) above nut (3).
2. a kind of engine cylinder cover bolt tightening method according to claim 1, it is characterised in that described step S2
In, the pre-fastening moment of cylinder bolt (2) is the 70% of its final moment of torsion.
3. a kind of engine cylinder cover bolt tightening method according to claim 1, it is characterised in that described step S3
In, before nut (3) is tightened, lubricating fluid is injected to the contact surface between cylinder bolt (2) and nut (3).
4. a kind of engine cylinder cover bolt tightening method according to claim 1, it is characterised in that described step S4
In, during nut (3) is 100 °, described step S5 along the angle that its tightening direction rotates, nut (3) rotates along its tightening direction
Angle be 80 °.
5. a kind of engine cylinder cover bolt tightening method according to claim 1, it is characterised in that described step S6
In, nut (3) is 40 ° along the angle that its tightening direction rotates.
6. a kind of engine cylinder cover bolt tightening method according to any one in claim 1-5, it is characterised in that institute
In the step S3~S5 stated, each step is tightened after nut (3), needs to wait for carrying out next step operation after a period of time again.
7. a kind of engine cylinder cover bolt tightening method according to claim 6, it is characterised in that complete the step
After S3, the time of wait is 4 minutes, is completed after step S4, and the time of wait is 6 minutes, completes the time waited after step S5
For 8 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710333093.3A CN106985101B (en) | 2017-05-12 | 2017-05-12 | A kind of engine cylinder cover bolt tightening method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710333093.3A CN106985101B (en) | 2017-05-12 | 2017-05-12 | A kind of engine cylinder cover bolt tightening method |
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| Publication Number | Publication Date |
|---|---|
| CN106985101A true CN106985101A (en) | 2017-07-28 |
| CN106985101B CN106985101B (en) | 2018-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710333093.3A Active CN106985101B (en) | 2017-05-12 | 2017-05-12 | A kind of engine cylinder cover bolt tightening method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107571005A (en) * | 2017-10-31 | 2018-01-12 | 广西玉柴机器股份有限公司 | A kind of holoaxial cylinder bolt tightening method of compatible four or six cylinders of energy |
| CN108858056A (en) * | 2018-07-27 | 2018-11-23 | 广西玉柴机器股份有限公司 | A kind of tightening method for preventing rubber gasket fastening bolt torque from decaying |
| CN111390547A (en) * | 2020-05-18 | 2020-07-10 | 南通大学 | Bolt pretightening force loading method |
| CN112729789A (en) * | 2020-12-24 | 2021-04-30 | 东风汽车集团有限公司 | Method for formulating and evaluating tightening process of plastic region of key bolt of engine |
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| US8943670B2 (en) * | 2012-08-17 | 2015-02-03 | Ford Global Technologies, Llc | Composite engine part and fastener assembly and method of securing a composite part to an engine |
| CN103423274B (en) * | 2013-08-27 | 2015-07-08 | 南车株洲电力机车研究所有限公司 | Method of guaranteeing fan high-strength bolt pretightening force to be accurately exerted |
| CN106041498A (en) * | 2016-06-14 | 2016-10-26 | 江苏永昊高强度螺栓有限公司 | Moment plus corner screwing process for bolts of engine connection rod |
| CN106378746A (en) * | 2016-11-10 | 2017-02-08 | 无锡市明盛强力风机有限公司 | Manual assembly technology for cylinder cover bolt |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975214A (en) * | 2010-11-16 | 2011-02-16 | 吴江市金茂五金有限公司 | Anti-loose fastening method of bolt pair |
| US8943670B2 (en) * | 2012-08-17 | 2015-02-03 | Ford Global Technologies, Llc | Composite engine part and fastener assembly and method of securing a composite part to an engine |
| CN103423274B (en) * | 2013-08-27 | 2015-07-08 | 南车株洲电力机车研究所有限公司 | Method of guaranteeing fan high-strength bolt pretightening force to be accurately exerted |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107571005A (en) * | 2017-10-31 | 2018-01-12 | 广西玉柴机器股份有限公司 | A kind of holoaxial cylinder bolt tightening method of compatible four or six cylinders of energy |
| CN107571005B (en) * | 2017-10-31 | 2019-04-05 | 广西玉柴机器股份有限公司 | A kind of holoaxial cylinder bolt tightening method of compatible four or six cylinders of energy |
| CN108858056A (en) * | 2018-07-27 | 2018-11-23 | 广西玉柴机器股份有限公司 | A kind of tightening method for preventing rubber gasket fastening bolt torque from decaying |
| CN111390547A (en) * | 2020-05-18 | 2020-07-10 | 南通大学 | Bolt pretightening force loading method |
| CN111390547B (en) * | 2020-05-18 | 2021-07-02 | 南通大学 | Bolt pretightening force loading method |
| CN112729789A (en) * | 2020-12-24 | 2021-04-30 | 东风汽车集团有限公司 | Method for formulating and evaluating tightening process of plastic region of key bolt of engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106985101B (en) | 2018-11-02 |
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