CN104802123A - Method for detecting tightening torque of cylinder cover bolt - Google Patents
Method for detecting tightening torque of cylinder cover bolt Download PDFInfo
- Publication number
- CN104802123A CN104802123A CN201510236137.1A CN201510236137A CN104802123A CN 104802123 A CN104802123 A CN 104802123A CN 201510236137 A CN201510236137 A CN 201510236137A CN 104802123 A CN104802123 A CN 104802123A
- Authority
- CN
- China
- Prior art keywords
- cylinder head
- head bolt
- incline
- cylinder cover
- detection method
- Prior art date
- 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.)
- Pending
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The invention discloses a method for detecting the tightening torque of a cylinder cover bolt. The detection method comprises the steps of marking: making an initial mark at the position, corresponding to a first side edge of a bolt head of the cylinder cover bolt to be detected, of the top surface of a cylinder cover; unscrewing: unscrewing the cylinder cover bolt by virtue of a torque wrench; screwing: screwing the cylinder cover bolt to rotate the first side edge to the position corresponding to the initial mark by virtue of the torque wrench, wherein a reading of the torque wrench at the moment is the tightening torque of the cylinder cover bolt. The method has the beneficial effects that by the simple steps of making the mark and sequentially unscrewing and screwing the cylinder cover bolt, requirements on the experiences and the skills of an operator are avoided, the influence of own static frictional force when the bolt starts rotating is eliminated, a detection result of the tightening torque of the cylinder cover bolt is closer to an actual value, the detection accuracy is improved, and a more reliable basis is provided for the investigation, the analysis and the improvement of a failure.
Description
Technical field
The present invention relates to a kind of detection method, particularly a kind of detection method of cylinder head bolt screw-down torque.
Background technology
The decay of cylinder head bolt screw-down torque be cause engine to rush cylinder, one of failure cause of turning one's coat, therefore require to tear open before cylinder cap and detect cylinder head bolt screw-down torque.The detection method of usual employing directly tightens method, and namely tight a bolt clockwise with the torque spanner of band dial plate, reading at screws the moment that the dial plate of torque spanner shows instantaneously is bolt tightening moment.But in the detection method of prior art, the hand of dial of screws moment torque spanner is beated fast and scope is large, and easily cause read untrue, therefore can not truly reflect bolt tightening moment, this can bring misleading to accident analysis.In addition, the stiction of self need be overcome during screws, therefore screws moment torque spanner dial reading first big after small, and reading little be only bolt tightening moment, but this number reading method needs the experiences and skills of operating personnel, not that everybody can control.
Therefore, need a kind of detection method of cylinder head bolt screw-down torque of improvement, cylinder head bolt screw-down torque can be detected exactly, and easily operate.
The information being disclosed in this background technology part is only intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or imply in any form that this information structure has been prior art that persons skilled in the art are known.
Summary of the invention
The object of the present invention is to provide a kind of detection method of cylinder head bolt screw-down torque, thus to overcome in prior art bolt tightening moment and detect inaccurate and high shortcoming is required to the experiences and skills of operating personnel.
For achieving the above object, the invention provides a kind of detection method of cylinder head bolt screw-down torque, this detection method comprises the steps:
Mark: mark initial marking corresponding on the position of the first incline of the bolt head of cylinder head bolt to be detected in top surface of cylinder cover;
Unscrew: use torque spanner to be unscrewed by cylinder head bolt;
Tighten: use torque spanner to be tightened by cylinder head bolt, make the first incline turn to the position corresponding with initial marking, now the reading of torque spanner is cylinder head bolt screw-down torque.
Preferably, technique scheme unscrew in step, cylinder head bolt rotates counterclockwise 30 ° to 90 °.
Preferably, technique scheme unscrew in step, cylinder head bolt rotates counterclockwise 60 °.
Preferably, the markers step of technique scheme also comprises: the position corresponding to the second incline in top surface of cylinder cover marks terminal mark, and the second incline is adjacent with the first incline and be positioned at the counter clockwise direction of the first incline; Wherein, unscrew step the first incline to be turned to identify corresponding position with terminal.
Preferably, the markers step of technique scheme also comprises: on the first incline, mark reference identification.
Preferably, before the markers step of technique scheme, also cleanup step is comprised: cleaned out by the dirt on the bolt head of cylinder head bolt and the top surface of cylinder cover of periphery thereof.
Preferably, in technique scheme, markers step adopts oil pen to complete.
Compared with prior art, the present invention has following beneficial effect: by simply marking and cylinder head bolt first being unscrewed the step of tightening again, avoid the requirement to operating personnel's experiences and skills, and eliminate the impact of self stiction when bolt starts to rotate, make the testing result of cylinder head bolt screw-down torque closer to actual value, improve the degree of accuracy of detection, thus provide more reliable foundation for the investigation and analysis of fault and improvement.
Accompanying drawing explanation
Fig. 1 is the top view according to the cylinder head bolt head in the detection method of a kind of cylinder head bolt screw-down torque of the present invention.
Fig. 2 is the side view according to the cylinder head bolt head in the detection method of a kind of cylinder head bolt screw-down torque of the present invention.
Fig. 3 is the flow chart of the detection method according to a kind of cylinder head bolt screw-down torque of the present invention.
Main Reference Numerals illustrates:
10-bolt head, 11-first incline, 12-second incline, 20-top surface of cylinder cover, 30-initial markers.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention not by the restriction of detailed description of the invention.
Clearly represent unless otherwise other, otherwise in whole description and claims, term " comprise " or its conversion as " comprising " or " including " etc. by be understood to include the element of stating or part, and do not get rid of other elements or other parts.
As shown in Figure 1 to Figure 2, the bolt head 10 of cylinder head bolt is turret head, its end face is regular hexagon, will wherein any incline is as the first incline 11, and the anticlockwise incline that be positioned at first incline 11 adjacent with the first incline 11 is as the second incline 12.
Shown in Fig. 3, the detection method 300 according to a kind of cylinder head bolt screw-down torque of the specific embodiment of the present invention comprises the steps:
Markers step 301: mark initial marking 30 corresponding on the position of the first incline 11 of the bolt head 10 of cylinder head bolt to be detected in top surface of cylinder cover 20;
Unscrew step 302: use torque spanner to be unscrewed by cylinder head bolt;
Tighten step 303: use torque spanner to be tightened by cylinder head bolt, make the first incline 11 turn to the position corresponding with initial marking 30, now the reading of torque spanner is cylinder head bolt screw-down torque.
In one or more detailed description of the invention of the present invention, for the ease of identifying the first incline 11, can mark reference identification on the first incline 11, this reference identification can be waited with shape tag such as point, lines on the first incline 11 by oil pen.
Unscrew in step 302 in one or more detailed description of the invention of the present invention, cylinder head bolt rotates counterclockwise 30 ° to 90 °, and preferably, cylinder head bolt rotates counterclockwise 60 °.If unscrewed, rotated angle is excessive will waste the working time, reduces operating efficiency, and if angle is too small cannot obtain metastable moment reading ensuing tightening in step 303.
When preferred cylinder head bolt rotates counterclockwise 60 °, also comprise in the markers step 301 of one or more detailed description of the invention of the present invention: the position corresponding to the second incline 12 in top surface of cylinder cover 20 marks terminal mark (not shown), the second incline 12 is adjacent with the first incline 11 and be positioned at the counter clockwise direction of the first incline 11; Wherein, unscrew step 302 first incline 11 to be turned to identify corresponding position with terminal.
The marking tools such as oil pen can be adopted to mark with shapes such as point, lines in the markers step 301 of one or more detailed description of the invention of the present invention.
Before the markers step 301 of one or more detailed description of the invention of the present invention, also comprise cleanup step: cleaned out by the dirt on the bolt head 10 of cylinder head bolt and the top surface of cylinder cover 20 of periphery thereof.
Although it is to be understood that detection method of the present invention is the screw-down torque for detecting cylinder head bolt, it is not for limiting the present invention.Under enlightenment of the present invention, those skilled in the art are easy to the screw-down torque expecting this detection method being applied to the bolt detecting other types.
The aforementioned description to concrete exemplary of the present invention is to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.The object selected exemplary embodiment and describe is to explain certain principles of the present invention and practical application thereof, thus those skilled in the art can be realized and utilize various different exemplary of the present invention and various different selection and change.Scope of the present invention is intended to limited by claims and equivalents thereof.
Claims (7)
1. a detection method for cylinder head bolt screw-down torque, is characterized in that, this detection method comprises the steps:
Mark: mark initial marking corresponding on the position of the first incline of the bolt head of cylinder head bolt to be detected in top surface of cylinder cover;
Unscrew: use torque spanner to be unscrewed by described cylinder head bolt;
Tighten: use described torque spanner to be tightened by described cylinder head bolt, make described first incline turn to the position corresponding with described initial marking, now the reading of described torque spanner is cylinder head bolt screw-down torque.
2. the detection method of cylinder head bolt screw-down torque according to claim 1, is characterized in that, described in unscrew in step, described cylinder head bolt rotates counterclockwise 30 ° to 90 °.
3. the detection method of cylinder head bolt screw-down torque according to claim 1, is characterized in that, described in unscrew in step, described cylinder head bolt rotates counterclockwise 60 °.
4. the detection method of cylinder head bolt screw-down torque according to claim 1, it is characterized in that, described markers step also comprises: the position corresponding to the second incline in described top surface of cylinder cover marks terminal mark, and described second incline is adjacent with described first incline and be positioned at the counter clockwise direction of described first incline;
Wherein, unscrew step described in described first incline to be turned to identify corresponding position with described terminal.
5. the detection method of cylinder head bolt screw-down torque according to claim 1, is characterized in that, described markers step also comprises: on described first incline, mark reference identification.
6. the detection method of cylinder head bolt screw-down torque according to claim 1, is characterized in that, before described markers step, also comprises the steps:
Cleaning: the dirt on the bolt head of cylinder head bolt and the top surface of cylinder cover of periphery thereof is cleaned out.
7. the detection method of cylinder head bolt screw-down torque according to claim 1, is characterized in that, described markers step adopts oil pen to complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510236137.1A CN104802123A (en) | 2015-05-12 | 2015-05-12 | Method for detecting tightening torque of cylinder cover bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510236137.1A CN104802123A (en) | 2015-05-12 | 2015-05-12 | Method for detecting tightening torque of cylinder cover bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104802123A true CN104802123A (en) | 2015-07-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510236137.1A Pending CN104802123A (en) | 2015-05-12 | 2015-05-12 | Method for detecting tightening torque of cylinder cover bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104802123A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111372729A (en) * | 2017-11-17 | 2020-07-03 | 阿特拉斯·科普柯工业技术公司 | Method for detecting whether fastener is tightened |
| CN114035625A (en) * | 2021-11-22 | 2022-02-11 | 北京卫星环境工程研究所 | Torque control method of electric tool for space on-orbit maintenance |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0852663A (en) * | 1994-08-09 | 1996-02-27 | Murata Sangyo Kk | High strength bolt tightening method |
| CN201503254U (en) * | 2009-09-30 | 2010-06-09 | 江苏中泰钢结构股份有限公司 | High-strength bolt screwing inspection ring |
| CN102658477A (en) * | 2012-02-20 | 2012-09-12 | 常熟华威履带有限公司 | Method for tightening bolts by combination of screwing clockwise and anticlockwise |
| 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 |
| CN203908429U (en) * | 2014-04-16 | 2014-10-29 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Protractor used for high strength bolt rotation angle method inspection |
-
2015
- 2015-05-12 CN CN201510236137.1A patent/CN104802123A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0852663A (en) * | 1994-08-09 | 1996-02-27 | Murata Sangyo Kk | High strength bolt tightening method |
| CN201503254U (en) * | 2009-09-30 | 2010-06-09 | 江苏中泰钢结构股份有限公司 | High-strength bolt screwing inspection ring |
| CN102658477A (en) * | 2012-02-20 | 2012-09-12 | 常熟华威履带有限公司 | Method for tightening bolts by combination of screwing clockwise and anticlockwise |
| 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 |
| CN203908429U (en) * | 2014-04-16 | 2014-10-29 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Protractor used for high strength bolt rotation angle method inspection |
Non-Patent Citations (1)
| Title |
|---|
| LAOXIAMI: "《测量螺栓力矩时 应该是拧松测量还是拧紧测量》", 《百度知道 HTTP://ZHIDAO.BAIDU.COM/QUESTION/1797085409838604627.HTML》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111372729A (en) * | 2017-11-17 | 2020-07-03 | 阿特拉斯·科普柯工业技术公司 | Method for detecting whether fastener is tightened |
| CN111372729B (en) * | 2017-11-17 | 2021-11-26 | 阿特拉斯·科普柯工业技术公司 | Method for detecting whether fastener is tightened |
| CN114035625A (en) * | 2021-11-22 | 2022-02-11 | 北京卫星环境工程研究所 | Torque control method of electric tool for space on-orbit maintenance |
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| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150729 |