CN102230490A - Bolt convenient to pre-compress and dedicated pre-compressing method - Google Patents
Bolt convenient to pre-compress and dedicated pre-compressing method Download PDFInfo
- Publication number
- CN102230490A CN102230490A CN2011101751589A CN201110175158A CN102230490A CN 102230490 A CN102230490 A CN 102230490A CN 2011101751589 A CN2011101751589 A CN 2011101751589A CN 201110175158 A CN201110175158 A CN 201110175158A CN 102230490 A CN102230490 A CN 102230490A
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- CN
- China
- Prior art keywords
- bolt
- pretension
- round nut
- temperature
- fastening
- 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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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000005485 electric heating Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
The invention provides a bolt convenient to pre-compress, which can realize the operability of pre-compressing bolts on heavy mechanical equipment and equipment with limited operation space and ensure that external force is saved, and time for pre-compressing bolts can be shortened; and therefore the invention also provides a dedicated pre-compressing method of the bolt. The bolt convenient to pre-compress comprises a pre-compressed bolt and a torque-force round nut and is characterized in that the center of the pre-compressed bolt is provided with a mounting hole, and the mounting hole of the pre-compressed bolt is internally provided with a heating rod. The pre-compressing method comprises the following steps of: heating the core part of the pre-compressed bolt to cause the pre-compressed bolt to be expanded; controlling heating temperature by a temperature measuring gun or a temperature gauge; after required temperature is achieved, fastening the torque-force round nut by a stress application bar; and after the torque-force round nut is fastened to a proper position, closing an electric heating bar to cool the pre-compressed bolt so as to fasten the pre-compressed bolt.
Description
Technical field
The present invention relates to a kind of bolt that makes things convenient for pretension, the invention still further relates to the special-purpose pre-clamping method of bolt.
Background technique
The pre-clamping method majority of the bolt that is adopted in machinery installation at present and the location is the method for working pressure pretension, need be during pretension bolt by instruments such as torque spanner, pretensioner or hydraulic spanners, need bigger pretightening force and pretension time long during pretension bolt, when on the equipment of heavy duty equipment or operating space restriction, carrying out the bolt pretension, just need sizable external force or can't implement at all.
Summary of the invention
There is above-mentioned shortcoming at the pre-clamping method of existing bolt, the invention provides a kind of bolt that makes things convenient for pretension, it can be implemented in the operability of carrying out the bolt pretension on the equipment of heavy duty equipment or operating space restriction, save external force, and can shorten the required time of pretension bolt, for this reason, the present invention also provides the special-purpose pre-clamping method of bolt.
Its technological scheme is such, a kind of bolt that makes things convenient for pretension, and it comprises pretension bolt, and the torsion round nut is characterized in that: described pretension bolt center is furnished with mounting hole, and electricity is equipped with heating stick in the mounting hole of described pretension bolt.
The special-purpose pre-clamping method of bolt, it is characterized in that: it may further comprise the steps,
⑴ heat pretension bolt heart portion, and pretension bolt is expanded;
⑵ utilization temperature-measuring gun or thermometer control heating-up temperature arrive temperature required back and use the fastening torsion round nut of extension lever;
With the torsion round nut is fastening put in place after, close electrical heating rod and make pretension bolt cooling, realize the fastening of pretension bolt.
Its further feature also is: in fastening process, and power operation.
The present invention adopts after the said structure, utilize the bolt expanded by heating, cool off fastening principle, can be implemented in the operability of carrying out the bolt pretension on the equipment that limits in heavy duty equipment or operating space, disperse by bolt heart portion heating being made in the bolt thermal stress, can avoid traditional heating means heart portion temperature to be lower than the phenomenon of hull-skin temperature, and the shortening time, because bolt grade of steel, the difference of specification, required preheating temperature is also different, utilization temperature-measuring gun or thermometer can be controlled electrical heating rod and reach required temperature, the process of closing electrical heating rod is a power operation, can avoid electrical heating rod to produce leaky, used the extension lever tightening nut simultaneously, can increase fastening external force and can avoid temperature to burn simultaneously.
Description of drawings
Fig. 1 is the structural representation of bolt among the present invention.
Embodiment
See Fig. 1, the present invention includes pretension bolt 1, torsion round nut 2, pretension bolt 1 center is furnished with mounting hole 4, and electrical heating rod 3 is installed in the mounting hole 4 of tight bolt 1.
Describe the present invention below in conjunction with embodiment it implements the pretension process of bolt by following steps:
⑴ heat pretension bolt 3 heart portions, and pretension bolt 3 is expanded;
⑵ utilization temperature-measuring gun or thermometer control heating-up temperature arrive temperature required back and use the fastening torsion round nut 2 of extension lever;
With torsion round nut 2 fastening putting in place after, outage is closed electrical heating rod 3 and is made pretension bolt 1 cooling, realizes the fastening of pretension bolt 1.
Claims (3)
1. bolt that makes things convenient for pretension, it comprises pretension bolt, and the torsion round nut is characterized in that: described pretension bolt center is furnished with mounting hole, and electricity is equipped with heating stick in the mounting hole of described pretension bolt.
2. the special-purpose pre-clamping method of bolt, it is characterized in that: it may further comprise the steps, and ⑴ heats pretension bolt heart portion, and pretension bolt is expanded; ⑵ utilization temperature-measuring gun or thermometer control heating-up temperature arrive temperature required back and use the fastening torsion round nut of extension lever; With the torsion round nut is fastening put in place after, close electrical heating rod and make pretension bolt cooling, realize the fastening of pretension bolt.
3. according to the special-purpose pre-clamping method of the described bolt of claim 2, it is characterized in that: in fastening process, power operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101751589A CN102230490A (en) | 2011-06-27 | 2011-06-27 | Bolt convenient to pre-compress and dedicated pre-compressing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101751589A CN102230490A (en) | 2011-06-27 | 2011-06-27 | Bolt convenient to pre-compress and dedicated pre-compressing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102230490A true CN102230490A (en) | 2011-11-02 |
Family
ID=44843087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101751589A Pending CN102230490A (en) | 2011-06-27 | 2011-06-27 | Bolt convenient to pre-compress and dedicated pre-compressing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102230490A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485138A (en) * | 2014-10-09 | 2016-04-13 | 遵义遵宏螺杆厂 | Pre-tightening bolt assembly |
| RU2602478C1 (en) * | 2015-09-28 | 2016-11-20 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Северный (Арктический) федеральный университет имени М.В. Ломоносова" (САФУ) | High-loaded thermal tightened threaded connection |
| CN106391742A (en) * | 2016-11-21 | 2017-02-15 | 考迈托（佛山）挤压科技股份有限公司 | Extruder pull rod structure and installation method |
| CN109676989A (en) * | 2019-01-30 | 2019-04-26 | 荣成华东锻压机床股份有限公司 | A kind of mechanical press crankshaft-link rod clamp device |
| CN109773104A (en) * | 2019-01-30 | 2019-05-21 | 荣成华东锻压机床股份有限公司 | A kind of mechanical press screw rod set clamp device and method |
| CN109798296A (en) * | 2019-01-30 | 2019-05-24 | 荣成华东锻压机床股份有限公司 | A kind of clamp device and method on mechanical press |
| CN110966296A (en) * | 2019-12-27 | 2020-04-07 | 南京金鑫传动设备有限公司 | A bolt kit and its connection anti-loosening method |
| CN111175162A (en) * | 2019-03-22 | 2020-05-19 | 湘潭大学 | Device for applying confining pressure on one side of rock sample block and method for applying confining pressure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201836180U (en) * | 2010-10-27 | 2011-05-18 | 东风汽车公司 | Double-head bolt heated and pre-tightened by flame |
| CN202140395U (en) * | 2011-06-27 | 2012-02-08 | 无锡西姆莱斯石油专用管制造有限公司 | Bolt convenient for pretightening |
-
2011
- 2011-06-27 CN CN2011101751589A patent/CN102230490A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201836180U (en) * | 2010-10-27 | 2011-05-18 | 东风汽车公司 | Double-head bolt heated and pre-tightened by flame |
| CN202140395U (en) * | 2011-06-27 | 2012-02-08 | 无锡西姆莱斯石油专用管制造有限公司 | Bolt convenient for pretightening |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485138A (en) * | 2014-10-09 | 2016-04-13 | 遵义遵宏螺杆厂 | Pre-tightening bolt assembly |
| CN105485138B (en) * | 2014-10-09 | 2019-12-20 | 遵义遵宏螺杆厂 | Pre-tightening bolt assembly |
| RU2602478C1 (en) * | 2015-09-28 | 2016-11-20 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Северный (Арктический) федеральный университет имени М.В. Ломоносова" (САФУ) | High-loaded thermal tightened threaded connection |
| CN106391742A (en) * | 2016-11-21 | 2017-02-15 | 考迈托（佛山）挤压科技股份有限公司 | Extruder pull rod structure and installation method |
| CN109676989A (en) * | 2019-01-30 | 2019-04-26 | 荣成华东锻压机床股份有限公司 | A kind of mechanical press crankshaft-link rod clamp device |
| CN109773104A (en) * | 2019-01-30 | 2019-05-21 | 荣成华东锻压机床股份有限公司 | A kind of mechanical press screw rod set clamp device and method |
| CN109798296A (en) * | 2019-01-30 | 2019-05-24 | 荣成华东锻压机床股份有限公司 | A kind of clamp device and method on mechanical press |
| CN111175162A (en) * | 2019-03-22 | 2020-05-19 | 湘潭大学 | Device for applying confining pressure on one side of rock sample block and method for applying confining pressure |
| CN111175162B (en) * | 2019-03-22 | 2024-02-23 | 湘潭大学 | Device and method for applying confining pressure on one side of rock sample block |
| CN110966296A (en) * | 2019-12-27 | 2020-04-07 | 南京金鑫传动设备有限公司 | A bolt kit and its connection anti-loosening method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20111102 |
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| RJ01 | Rejection of invention patent application after publication |