CN102212767A - Surface treatment process of bolt connection pair - Google Patents
Surface treatment process of bolt connection pair Download PDFInfo
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- CN102212767A CN102212767A CN2011101279390A CN201110127939A CN102212767A CN 102212767 A CN102212767 A CN 102212767A CN 2011101279390 A CN2011101279390 A CN 2011101279390A CN 201110127939 A CN201110127939 A CN 201110127939A CN 102212767 A CN102212767 A CN 102212767A
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- molybdenumdisulphide
- film lubricant
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Abstract
The invention discloses a surface treatment process of a bolt connection pair, comprising the following steps of: galvanizing on the surface of the bolt connection pair; and then performing secondary surface treatment by the steps of: A, preparing lubricant, wherein the lubricant is composed of molybdenum disulfide, dry film lubricant and de-ionized water; and the mass ratio of the molybdenum disulfide to the dry film lubricant to the de-ionized water is 1:15:(50-100); adding the dry film lubricant and the molybdenum disulfide into the de-ionized water and uniformly stirring; B, immersing the galvanized bolt connection pair in the lubricant prepared in the step A to perform centrifugal rotation, wherein the rotation speed is 300 rpm and the centrifugal rotation time is 30 s; and C, after the centrifugal rotation, taking out the bolt connection pair; and drying at 200-250 degrees centigrade for 30 min. The bolt connection pair can be applicable to application occasions with requirement on higher rust protection capability through the secondary surface treatment so as to achieve the purpose of precisely controlling torque coefficients.
Description
(1) technical field
The present invention relates to a kind of process of surface treatment of bolt auxiliary connection.
(2) background technology
The bolt auxiliary connection comprises bolt and the nuts and washers of rotation set on screw rod with spiral shell head and screw rod.
In national standard " GB/T 1228～1231-2006 steel construction high auxiliary connection " and " GB/T 3632-2008 steel construction torque-shear type high strength bolt auxiliary connection ", two kinds of high strength bolt auxiliary connections that are used for steel construction have been stipulated.
Since the high strength bolt auxiliary connection be mainly used in railway, bridge, boiler steel structure, industrial premises, high-rise civil building, tower mast structure, hoisting machinery etc. some in the higher facility of security requirement, so high strength bolt is all higher to the accuracy requirement of bolted fastener shaft power in the construction reference of relevant industries.
By the industry standard of China, in the construction of steel construction, the mounting means of bolt is commonly " calibrated wrench method ", applies specific moment of torsion during promptly by installation and reaches accurate fastener shaft power.For realizing this purpose, prerequisite precondition is: the torque coefficient of bolt auxiliary connection must be accurate relatively.
Therefore, in relevant GB, all require the bolt auxiliary connection to guarantee the torque coefficient supply of material: regulation in " GB/T 1231-2006 high-strength large hexagon head bolt used for steel structure, heavy series hexagon nut, gasket techniques condition ": the high-strength big six-angle spiral auxiliary connection should guarantee the torque coefficient supply of material, torque coefficient mean value is in 0.110～0.150 scope, and the torque coefficient standard deviation of batch auxiliary connection should be less than or equal to 0.010 together; Regulation in " GB/T 3632-2008 steel construction with torque-shear type high strength bolt auxiliary connection ": when wabbler was twisted into two parts, the fastener shaft power of auxiliary connection should be within the limits prescribed.The implication of this requirement is: the value of the torque coefficient of the same batch auxiliary connection of necessary assurance is in 0.110～0.150 scope.
In order to reach the torque coefficient requirement of regulation, all stipulate in above-mentioned two standards: bolt, nuts and washers should carry out surface treatment, and processing mode is determined by manufacturing firm.Under state-of-the art, satisfy in the standard the requirement of torque coefficient, each manufacturing firm generally can only take phosphatization or turn black these two kinds of surface treatment modes that antirust ability is relatively poor.Regulation is by manufacturing firm decision surface treatment mode in the standard, for the application scenario of the antirust ability of having relatively high expectations, be can not make customer satisfaction system.
(3) summary of the invention
The deficiency that can not adapt to the application scenario of the antirust ability of having relatively high expectations for the surface treatment mode that overcomes existing bolt auxiliary connection, the invention provides a kind of process of surface treatment of bolt auxiliary connection, the application scenario that can adapt to the antirust ability of having relatively high expectations reaches the purpose of accurate control torque coefficient.
The technical scheme that the present invention solves its technical problem is: a kind of process of surface treatment of bolt auxiliary connection, at first carry out zinc-platedly on the surface of described bolt auxiliary connection, and after zinc-plated, carry out secondary surface preparation again, the step of this secondary surface preparation is:
A: preparation lubricant, should lubricated form by molybdenumdisulphide, dry-film lubricant and deionized water, molybdenumdisulphide: dry-film lubricant: deionized mass ratio is 1: 15: 50～100, the kind of dry-film lubricant is more, the dry-film lubricant that is suitable for being used for regulating torque coefficient should possess following condition: 1. must be water base dry-film lubricant: for the oil base dry-film lubricant, water base dry-film lubricant has more excellent high low temperature stability.2. strong adhesion: dry-film lubricant reply steel shows higher affinity.The adhesion test method is pressed " HB 70563-2004 dry-film lubricant test method " the 3rd part: dry-film lubricant adhesion test method is carried out.3. film forming speed is fast: film formation time should be above 30 seconds under 20 ℃, humidity 40～70% environment.4. film covers evenly: under suitable concentration, the thicknesses of layers deviation should be as far as possible little.Measurement reference " HB 7056.2-2004 dry-film lubricant test method " part 2 of thicknesses of layers: dry-film lubricant thicknesses of layers test method is carried out.5. frictional coefficient should be suitable: comparing test with bolt auxiliary connection torque coefficient test, torque coefficient answers scope and the dispersion ratio stipulated in the conformance with standard should be as far as possible little.6. stability is strong: can adopt acidproof, salt spray resistance, high temperature resistant touchstone to compare test.
Amid all these factors, dry-film lubricant among the present invention is the GLEITMO lubricant that Volkdwagen oil product group (FUCHS PETROLUB AG) produces, the granularity of molybdenumdisulphide is 1900～2100 orders, and it is even that described dry-film lubricant and molybdenumdisulphide are joined deionized water for stirring;
B. will be immersed in through the bolt auxiliary connection of zinc-plated processing and carry out centrifugal rotation in the lubricant for preparing in the steps A, rotating speed is 300 rev/mins, and centrifugal rotation time is 30 seconds;
C. after centrifugal rotation is finished, the bolt auxiliary connection is pulled out, oven dry is 30 minutes under 200～250 ℃ temperature.
The present invention regulates dry-film lubricant by following dual mode, to reach the torque coefficient of regulation: 1. regulate torque coefficient by thickness, overlay film adopts " centrifuging+oven dry " mode, and thickness is regulated by 3 factors: the concentration of centrifugation time, centrifugal speed and water base dry-film lubricant.In the practice, simple to operate in order to make, centrifugation time and centrifugal speed are fixed, regulate thickness by the concentration of controlling water base dry-film lubricant (solvent is a deionized water).2. regulate torque coefficient by adding molybdenumdisulphide, should be granularity as the molybdenumdisulphide of additive is micro mist about 2000 orders, joins by a certain percentage in the water base dry-film lubricant, can use after fully stirring.
Experiment showed, with the addition of molybdenumdisulphide and regulate that the torque coefficient dispersion ratio of acquisition is lower.And it is higher by the torque coefficient dispersion ratio of control thickness acquisition.Therefore, regulating the method for torque coefficient, should be auxilliary to adjust thickness based on control molybdenumdisulphide addition.
Beneficial effect of the present invention is: by secondary surface preparation, make the bolt auxiliary connection can adapt to the application scenario of the antirust ability of having relatively high expectations, reach the purpose of accurate control torque coefficient.
(4) description of drawings
Fig. 1 is the structural representation of bolt.
(5) embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Embodiment one
With reference to Fig. 1, the bolt auxiliary connection comprises bolt and nut 3 and the packing ring 4 of rotation set on screw rod 2 with spiral shell head 1 and screw rod 2.A kind of process of surface treatment of bolt auxiliary connection at first carries out zinc-platedly on the surface of described bolt auxiliary connection, zinc-plated mode is that Dacroment is zinc-plated, after zinc-plated, carries out secondary surface preparation again, and the step of this secondary surface preparation is:
A: preparation lubricant, should lubricated form by molybdenumdisulphide, dry-film lubricant and deionized water, molybdenumdisulphide: dry-film lubricant: deionized mass ratio is 1: 15: 100, dry-film lubricant wherein is the GLEITMO lubricant that Volkdwagen oil product group produces, the granularity of molybdenumdisulphide is 2000 orders, and it is even that described dry-film lubricant and molybdenumdisulphide are joined deionized water for stirring;
B. the lubricant for preparing in the steps A is placed in the whizzer, will be immersed in through the bolt auxiliary connection of zinc-plated processing in the lubricant for preparing in the steps A, open whizzer and carry out centrifugal rotation, rotating speed is 300 rev/mins, and centrifugal rotation time is 30 seconds;
C. after centrifugal rotation is finished, the bolt auxiliary connection is pulled out, placed in the dryer, under 200～250 ℃ temperature, (, therefore will get final product) oven dry 30 minutes in 200～250 ℃ of scopes of temperature control owing to be difficult to continuously accurate within a certain period of time controlled temperature.
The test torque coefficient all is in 0.125～0.129 scope.
Embodiment two
With reference to Fig. 1, the bolt auxiliary connection comprises bolt and nut 3 and the packing ring 4 of rotation set on screw rod 2 with spiral shell head 1 and screw rod 2.A kind of process of surface treatment of bolt auxiliary connection at first carries out zinc-platedly on the surface of described bolt auxiliary connection, zinc-plated mode is that galvanizing is zinc-plated, after zinc-plated, carries out secondary surface preparation again, and the step of this secondary surface preparation is:
A: preparation lubricant, should lubricated form by molybdenumdisulphide, dry-film lubricant and deionized water, molybdenumdisulphide: dry-film lubricant: deionized mass ratio is 1: 15: 50, dry-film lubricant wherein is the GLEITMO lubricant that Volkdwagen oil product group produces, the granularity of molybdenumdisulphide is 2000 orders, and it is even that described dry-film lubricant and molybdenumdisulphide are joined deionized water for stirring;
B. the lubricant for preparing in the steps A is placed in the whizzer, will be immersed in through the bolt auxiliary connection of zinc-plated processing in the lubricant for preparing in the steps A, open whizzer and carry out centrifugal rotation, rotating speed is 300 rev/mins, and centrifugal rotation time is 30 seconds;
C. after centrifugal rotation is finished, the bolt auxiliary connection is pulled out, placed in the dryer, under 200～250 ℃ temperature, (, therefore will get final product) oven dry 30 minutes in 200～250 ℃ of scopes of temperature control owing to be difficult to continuously accurate within a certain period of time controlled temperature.
The test torque coefficient all is in 0.126～0.131 scope.
Embodiment three
With reference to Fig. 1, the bolt auxiliary connection comprises bolt and nut 3 and the packing ring 4 of rotation set on screw rod 2 with spiral shell head 1 and screw rod 2.A kind of process of surface treatment of bolt auxiliary connection at first carries out zinc-platedly on the surface of described bolt auxiliary connection, zinc-plated mode is that Dacroment is zinc-plated, after zinc-plated, carries out secondary surface preparation again, and the step of this secondary surface preparation is:
A: preparation lubricant, should lubricated form by molybdenumdisulphide, dry-film lubricant and deionized water, molybdenumdisulphide: dry-film lubricant: deionized mass ratio is 1: 15: 60, dry-film lubricant wherein is the GLEITMO lubricant that Volkdwagen oil product group produces, the granularity of molybdenumdisulphide is 1980 orders, and it is even that described dry-film lubricant and molybdenumdisulphide are joined deionized water for stirring;
B. the lubricant for preparing in the steps A is placed in the whizzer, will be immersed in through the bolt auxiliary connection of zinc-plated processing in the lubricant for preparing in the steps A, open whizzer and carry out centrifugal rotation, rotating speed is 300 rev/mins, and centrifugal rotation time is 30 seconds;
C. after centrifugal rotation is finished, the bolt auxiliary connection is pulled out, placed in the dryer, under 200～250 ℃ temperature, (, therefore will get final product) oven dry 30 minutes in 200～250 ℃ of scopes of temperature control owing to be difficult to continuously accurate within a certain period of time controlled temperature.
The test torque coefficient all is in 0.125～0.130 scope.
Embodiment four
With reference to Fig. 1, the bolt auxiliary connection comprises bolt and nut 3 and the packing ring 4 of rotation set on screw rod 2 with spiral shell head 1 and screw rod 2.A kind of process of surface treatment of bolt auxiliary connection at first carries out zinc-platedly on the surface of described bolt auxiliary connection, zinc-plated mode is that galvanizing is zinc-plated, after zinc-plated, carries out secondary surface preparation again, and the step of this secondary surface preparation is:
A: preparation lubricant, should lubricated form by molybdenumdisulphide, dry-film lubricant and deionized water, molybdenumdisulphide: dry-film lubricant: deionized mass ratio is 1: 15: 85, dry-film lubricant wherein is the GLEITMO lubricant that Volkdwagen oil product group produces, the granularity of molybdenumdisulphide is 1900 orders, and it is even that described dry-film lubricant and molybdenumdisulphide are joined deionized water for stirring;
B. the lubricant for preparing in the steps A is placed in the whizzer, will be immersed in through the bolt auxiliary connection of zinc-plated processing in the lubricant for preparing in the steps A, open whizzer and carry out centrifugal rotation, rotating speed is 300 rev/mins, and centrifugal rotation time is 30 seconds;
C. after centrifugal rotation is finished, the bolt auxiliary connection is pulled out, placed in the dryer, under 200～250 ℃ temperature, (, therefore will get final product) oven dry 30 minutes in 200～250 ℃ of scopes of temperature control owing to be difficult to continuously accurate within a certain period of time controlled temperature.
The test torque coefficient all is in 0.126～0.130 scope.
Embodiment five
With reference to Fig. 1, the bolt auxiliary connection comprises bolt and nut 3 and the packing ring 4 of rotation set on screw rod 2 with spiral shell head 1 and screw rod 2.A kind of process of surface treatment of bolt auxiliary connection at first carries out zinc-platedly on the surface of described bolt auxiliary connection, zinc-plated mode is that galvanizing is zinc-plated, after zinc-plated, carries out secondary surface preparation again, and the step of this secondary surface preparation is:
A: preparation lubricant, should lubricated form by molybdenumdisulphide, dry-film lubricant and deionized water, molybdenumdisulphide: dry-film lubricant: deionized mass ratio is 1: 15: 700, dry-film lubricant wherein is the GLEITMO lubricant that Volkdwagen oil product group produces, the granularity of molybdenumdisulphide is 2100 orders, and it is even that described dry-film lubricant and molybdenumdisulphide are joined deionized water for stirring;
B. the lubricant for preparing in the steps A is placed in the whizzer, will be immersed in through the bolt auxiliary connection of zinc-plated processing in the lubricant for preparing in the steps A, open whizzer and carry out centrifugal rotation, rotating speed is 300 rev/mins, and centrifugal rotation time is 30 seconds;
C. after centrifugal rotation is finished, the bolt auxiliary connection is pulled out, placed in the dryer, under 200～250 ℃ temperature, (, therefore will get final product) oven dry 30 minutes in 200～250 ℃ of scopes of temperature control owing to be difficult to continuously accurate within a certain period of time controlled temperature.
The test torque coefficient all is in 0.125～0.131 scope.
Claims (1)
1. the process of surface treatment of a bolt auxiliary connection at first carries out zinc-platedly on the surface of described bolt auxiliary connection, it is characterized in that: after zinc-plated, carry out secondary surface preparation again, the step of this secondary surface preparation is:
A: preparation lubricant, should lubricated form by molybdenumdisulphide, dry-film lubricant and deionized water, molybdenumdisulphide: dry-film lubricant: deionized mass ratio is 1: 15: 50～100, dry-film lubricant wherein is the GLEITMO lubricant that Volkdwagen oil product group produces, the granularity of molybdenumdisulphide is 1900～2100 orders, and it is even that described dry-film lubricant and molybdenumdisulphide are joined deionized water for stirring;
B. will be immersed in through the bolt auxiliary connection of zinc-plated processing and carry out centrifugal rotation in the lubricant for preparing in the steps A, rotating speed is 300 rev/mins, and centrifugal rotation time is 30 seconds;
C. after centrifugal rotation is finished, the bolt auxiliary connection is pulled out, oven dry is 30 minutes under 200～250 ℃ temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110127939 CN102212767B (en) | 2011-05-16 | 2011-05-16 | Surface treatment process of bolt connection pair |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110127939 CN102212767B (en) | 2011-05-16 | 2011-05-16 | Surface treatment process of bolt connection pair |
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| CN102212767A true CN102212767A (en) | 2011-10-12 |
| CN102212767B CN102212767B (en) | 2013-04-03 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102896078A (en) * | 2012-09-28 | 2013-01-30 | 中国航空工业集团公司北京航空材料研究院 | Post-treatment method of surface of high-strength bolt connection pair |
| CN104832518A (en) * | 2015-04-24 | 2015-08-12 | 刘俊才 | Surface treatment process for tubular hollow rivets |
| CN111032900A (en) * | 2017-08-16 | 2020-04-17 | 法尔福控股合资有限公司 | Tensile or compressive member with corrosion resistant thread flanks |
| CN113083644A (en) * | 2021-03-12 | 2021-07-09 | 东风商用车有限公司 | Surface lubrication method for rivet bolt |
| CN115584156A (en) * | 2022-11-01 | 2023-01-10 | 定西高强度紧固件股份有限公司 | Bolt connection pair surface anticorrosion lubricating coating material, preparation method and coating method |
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| US3573111A (en) * | 1968-09-06 | 1971-03-30 | Microdot Inc | High lubricity corrosion resistant threaded fastener and method |
| US20090118147A1 (en) * | 2004-07-29 | 2009-05-07 | Texas Research International, Inc. | Low volatile organic content lubricant |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102896078A (en) * | 2012-09-28 | 2013-01-30 | 中国航空工业集团公司北京航空材料研究院 | Post-treatment method of surface of high-strength bolt connection pair |
| CN104832518A (en) * | 2015-04-24 | 2015-08-12 | 刘俊才 | Surface treatment process for tubular hollow rivets |
| CN111032900A (en) * | 2017-08-16 | 2020-04-17 | 法尔福控股合资有限公司 | Tensile or compressive member with corrosion resistant thread flanks |
| CN111032900B (en) * | 2017-08-16 | 2022-08-02 | 法尔福控股合资有限公司 | Tensile or compressive member with corrosion resistant thread flanks |
| US11414866B2 (en) | 2017-08-16 | 2022-08-16 | Pfeifer Holding Gmbh & Co. Kg | Tension member or compression member having corrosion-resistant thread flanks |
| CN113083644A (en) * | 2021-03-12 | 2021-07-09 | 东风商用车有限公司 | Surface lubrication method for rivet bolt |
| CN115584156A (en) * | 2022-11-01 | 2023-01-10 | 定西高强度紧固件股份有限公司 | Bolt connection pair surface anticorrosion lubricating coating material, preparation method and coating method |
| CN115584156B (en) * | 2022-11-01 | 2023-12-22 | 定西高强度紧固件股份有限公司 | Corrosion-resistant lubricating coating material for surface of bolt connection pair, preparation method and coating method |
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| CN102212767B (en) | 2013-04-03 |
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