CN101368253A - Automatic hot galvanizing technique for steel fastener - Google Patents
Automatic hot galvanizing technique for steel fastener Download PDFInfo
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- CN101368253A CN101368253A CNA2008100795681A CN200810079568A CN101368253A CN 101368253 A CN101368253 A CN 101368253A CN A2008100795681 A CNA2008100795681 A CN A2008100795681A CN 200810079568 A CN200810079568 A CN 200810079568A CN 101368253 A CN101368253 A CN 101368253A
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- galvanizing
- zinc
- throwing
- centrifugal
- workpiece
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- 238000005246 galvanizing Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 38
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 22
- 239000010959 steel Substances 0.000 title claims abstract description 22
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 84
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 84
- 239000011701 zinc Substances 0.000 claims abstract description 84
- 238000005406 washing Methods 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 20
- 238000007747 plating Methods 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 230000033001 locomotion Effects 0.000 claims abstract description 14
- 239000002253 acid Substances 0.000 claims abstract description 11
- 238000004806 packaging method and process Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 22
- 239000003513 alkali Substances 0.000 claims description 12
- 238000002161 passivation Methods 0.000 claims description 8
- 238000011068 loading method Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000003518 caustics Substances 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000002585 base Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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- Coating With Molten Metal (AREA)
Abstract
The invention discloses an automatic pot galvanizing technique of a steel fastener which orderly includes the working procedures like caustic washing, acid washing, water washing, assistant plating, drying, crating, galvanizing, centrifugal zinc throwing, water cooling, passivating, drying, packaging, and the like. The galvanizing temperature is between 450 and 480 DEG C; the working procedures of galvanizing and centrifugal zinc throwing are automatically controlled; the centrifugal zinc throwing is to hoist a galvanized workpiece out of a galvanized surface with a galvanizing material basket and lead the galvanized workpiece to horizontally rotate with the galvanizing material basket to make centrifugal movement. The technique leads the galvanized workpiece to instantly carry out zinc throwing without pouring the basket; the temperature drop of the workpiece is small; the galvanizing temperature can be reduced below 480 DEG C; energy is saved; the coherence for the intensity, the precision and the quality of the fastener is ensured; the service life of a zinc boiler is prolonged; the production cost is reduced; the processes for galvanizing and zinc throwing are automatic, safe and effective; besides, the working intensity is low. The technique provided by the invention can be used for carrying out pot galvanizing on the steel fasteners like bolts, nuts, nails, and the like.
Description
Technical Field
The invention relates to a surface treatment process of a metal component, in particular to an automatic hot galvanizing process of a steel fastener.
Background
The hot galvanizing technology is widely used for surface corrosion prevention of steel components, the binding force between a coating and a blank is strong, and the coating has a cathode protection effect on steel and can prolong the service life of the components. The current hot galvanizing process of steel fasteners such as bolts, nuts, nails and the like comprises the steps of alkali washing → acid washing → water washing → plating assistance → drying → basket loading → galvanizing in a zinc pot → zinc extraction in the zinc pot → pouring a workpiece into a centrifuge from the galvanized basket, zinc throwing → water cooling → passivation → drying → packaging and the like, wherein the step of galvanizing in the zinc pot → zinc extraction in the zinc pot → pouring into the centrifuge has the following defects:
firstly, the zinc is poured into a centrifuge to be thrown after coming out of the zinc pot, the process is longer, the temperature drop of the workpiece is large, and the redundant zinc liquid on the workpiece is easy to solidify and can not be thrown, so that the solidification of the zinc liquid is avoided by increasing the galvanizing temperature to 530-560 ℃, and the waste of a heat source is caused.
Secondly, the strength of the fastener is reduced due to the increase of the galvanization temperature, and the diameter of the fastener needs to be increased to ensure the fastening force.
And thirdly, the direction of the nut in the centrifuge is irregular, and the effect that residual zinc liquid cannot be thrown out can be caused if the nut hole does not point to the center of the centrifuge during zinc throwing. Therefore, the nut needs to be tapped for the second time, a zinc coating is damaged, and corrosion is easy to accelerate. Some manufacturers have solved this problem by increasing the tolerances of the bolt and nut, which adversely affects the tightening force.
And fourthly, the corrosion of the zinc liquid to the iron zinc pot is aggravated due to the high galvanizing temperature, a large amount of zinc slag is generated, the temperature needs to be raised again for melting the zinc slag, and the more serious corrosion to the zinc pot is caused at the moment. The vicious circle shortens the service life of the zinc pot even by one month, causes the waste of energy and materials, and greatly increases the production cost.
In a word, in the hot galvanizing process of the existing steel fastener, the galvanizing and zinc throwing processes need manual operation, the intensity and precision of a machined part cannot be guaranteed, the labor intensity of the operation process is high, the potential safety hazard is many, the energy consumption is high, and the operation cost is high.
Disclosure of Invention
The invention aims to solve the technical problem of providing an automatic hot galvanizing process for a steel fastener, which can carry out a zinc throwing procedure on a workpiece without basket pouring after zinc dipping. The galvanizing and zinc throwing are automatically controlled, the galvanizing charging basket is also used as a centrifugal zinc throwing basket, the centrifugal zinc throwing is carried out after the workpiece is lifted out of the zinc liquid level, the temperature of the workpiece is reduced, so that the galvanizing temperature can be reduced to be lower than 480 ℃, the energy is saved, the strength of a fastener is not influenced, and the quality consistency is good; the zinc dross is few, and zinc pot life greatly prolongs, has reduced manufacturing cost, and production efficiency is high, and intensity of labour is little. The process provided by the invention can be used for hot galvanizing of steel fasteners such as bolts, nuts, nails and the like.
The technical scheme adopted by the invention to solve the technical problems is as follows: an automatic hot galvanizing process for a steel fastener sequentially comprises the working procedures of alkali washing, acid washing, water washing, plating assisting, drying, basket filling, galvanizing, centrifugal galvanizing throwing, water cooling, passivation, drying, packaging and the like, wherein the galvanizing temperature is 450-480 ℃;
the galvanizing and centrifugal zinc throwing processes are automatically controlled, wherein the centrifugal zinc throwing is to lift the galvanized workpiece out of the zinc liquid level along with the galvanizing charging basket and make centrifugal motion along with the horizontal rotation of the galvanizing charging basket above the zinc liquid level.
As an improvement of the invention, the galvanizing and centrifugal zinc throwing procedures are automatically and continuously completed by an automatic hot galvanizing device of the steel fastener.
The 'automatic hot galvanizing device for steel fasteners' is a utility model patent application of the inventor, and the patent application number is 2008201061981. The device comprises a manipulator, a control mechanism of the manipulator and a charging basket grabbed and placed by the manipulator, wherein the control mechanism of the manipulator comprises a grabbing and placing control unit, a vertical movement control unit, a horizontal rotation control element and a horizontal movement control unit; the charging basket is used as a galvanizing basket and a centrifugal zinc throwing basket, and workpieces in the charging basket move along with the horizontal rotation of the manipulator at the position higher than the liquid level of zinc liquid, namely, move centrifugally.
The automatic hot galvanizing process of the steel fastener provided by the invention has the same other procedures as the prior art, wherein
Alkali washing: putting the workpiece into a lye tank, adjusting the alkali washing time according to the oil stain degree of the surface of the workpiece, and washing residual alkali on the surface with clean water after washing;
acid washing: putting the workpiece subjected to alkali washing and water washing into a hydrochloric acid tank for derusting, wherein the time is determined according to the rust degree of the surface of the workpiece;
washing with water: washing the workpiece after the acid washing with water to remove residual acid liquor;
plating assistance: putting the cleaned workpiece into a plating assistant tank with plating assistant agent for plating assistant treatment, wherein the plating assistant agent has the temperature of 55-65 ℃ and the pH value of 3.5-4.5;
drying: sending the plating-assistant workpiece into a drying box for drying;
basket loading: putting the dried workpiece into a charging basket for hot galvanizing;
water cooling: sending the workpiece subjected to hot galvanizing and centrifugal zinc throwing into a water cooling tank, and cooling the workpiece to normal temperature by water;
passivation: after water cooling, the workpiece is sent into a tank filled with a passivating agent for passivation treatment
And (3) drying and packaging: drying the passivated workpiece to obtain a finished product, and packaging for later use.
Due to the adoption of the technical scheme, the invention has the technical progress that: the galvanized workpiece is hung in the charging basket and separated from the liquid level of the zinc liquid, so that the zinc can be centrifugally thrown along with the rotation of the basket, the process is automatically controlled, the working procedure is simplified, the time consumption is short, the temperature drop is small, the energy is saved, the efficiency is high, the safety is realized, the quality of the galvanized workpiece is uniform, the hot galvanizing can be carried out at a lower temperature of below 480 ℃, the precision and the intensity of the workpiece are ensured, and the labor intensity and the operation cost of workers are reduced.
The invention has the following advantages and characteristics:
the galvanizing basket and the centrifuge basket are a basket, and after the workpiece is lifted out of the zinc liquid level, centrifugal zinc throwing is carried out, so that the temperature of the workpiece is reduced little, and the galvanizing temperature can be reduced. Generally less than 480 ℃, and energy is saved.
Secondly, the galvanizing temperature is low, so that the influence on the strength of the fastener is small, and the accuracy, strength and quality consistency of the workpiece are ensured.
And thirdly, the zinc plating temperature is reduced, so that less zinc slag is generated. The service life of the zinc pot is prolonged, and the production cost is reduced.
The galvanizing and zinc throwing process is full-automatic, the production efficiency is high, the labor intensity is low, and the safety performance is high.
The invention will be described in further detail with reference to the drawings and specific examples.
Drawings
FIG. 1 is a process flow diagram of an embodiment of the invention;
FIG. 2 is a schematic view of an automatic hot-dip galvanizing apparatus for a steel fastener used in the galvanizing and zinc throwing steps of FIG. 1.
In the figure: 1- -a base; 2- -rotating the support; 3- -hollow shaft; 4- -a servo motor; 5- -driven wheel; 6- -driving wheel; 7- -a transmission mechanism; 8- -a pull rod; 9- -a manipulator; 10. 20- -a holder; 11- -manipulator mount; 12- -vertical axis of rotation; 13- -a power plant; 14- -a basket; 15. 19- -Cylinder; 16- -horizontal cantilever; 18. 22- -a sleeve; 21- -horizontal hinge axis.
Detailed Description
Examples
FIG. 1 is a flow chart of an automatic hot galvanizing process for a steel fastener. The process sequentially comprises the working procedures of alkali washing, acid washing, water washing, plating assisting, drying, basket loading, zinc plating in a zinc pot, centrifugal zinc throwing when the zinc liquid level is lifted, zinc removal from the zinc pot, water cooling, passivation, drying, packaging and the like. Wherein,
alkali washing: putting the workpiece into a lye tank, adjusting the alkali washing time according to the oil stain degree of the surface of the workpiece, and washing residual alkali on the surface with clean water after washing;
acid washing: putting the workpiece subjected to alkali washing and water washing into a hydrochloric acid tank for derusting, wherein the time is determined according to the rust degree of the surface of the workpiece;
washing with water: washing the workpiece after the acid washing with water to remove residual acid liquor;
plating assistance: putting the cleaned workpiece into a plating assistant tank with plating assistant agent for plating assistant treatment, wherein the temperature of the plating assistant agent is 55-65 ℃, and the pH value is 3.5-4.5;
drying: sending the plating-assistant workpiece into a drying box for drying;
basket loading: putting the dried workpiece into a charging basket for hot galvanizing;
putting the mixture into a zinc pot for galvanizing, and extracting the liquid level of zinc for centrifugal zinc throwing: is automatically and continuously finished by an automatic hot galvanizing device of the steel fastener. The galvanizing temperature is 450-480 ℃; centrifugal zinc throwing, namely, after the galvanized workpiece is lifted out of a zinc pot in a galvanizing basket, the workpiece performs centrifugal motion above the liquid level of zinc liquid along with horizontal autorotation of the galvanizing basket;
water cooling: sending the workpiece subjected to hot galvanizing and centrifugal zinc throwing into a water cooling tank, and cooling the workpiece to normal temperature by water;
passivation: after water cooling, the workpiece is sent into a tank filled with a passivating agent for passivation treatment;
and (3) drying and packaging: drying the passivated workpiece to obtain a finished product, and packaging for later use.
The structural schematic diagram of the automatic hot galvanizing device for the steel fasteners is shown in FIG. 2, and the automatic hot galvanizing device comprises a manipulator 9, a control mechanism of the manipulator 9 and a charging basket 14 grabbed and placed by the manipulator 9.
The control mechanism of the manipulator 9 can enable the manipulator to realize the grabbing and placing of the charging basket 14, vertical movement, horizontal rotation and horizontal rotation, and comprises a grabbing and placing control unit, a vertical movement control unit, a horizontal rotation control unit and a horizontal movement control unit, wherein the grabbing and placing control unit comprises a base 1, a rotating support 2, a hollow shaft 3 and a control part cylinder 15 thereof, a servo motor 4 and a transmission mechanism 7 thereof, a pull rod 8 and a control part cylinder 10 thereof and the like.
Wherein, the base 1 is fixedly arranged, a vertical rotating shaft 12 driven by a power device 13 is arranged on the base, and the upper end of the vertical rotating shaft 12 is connected with a rotating support 2 of a cantilever 16; the boom 16 is horizontally telescopically adjustable.
The vertical hollow shaft 3 penetrating through the sleeve 18 is connected with the sleeve 18 through a key slot and is positioned at the arm end of the cantilever 16 through a bearing arranged on the sleeve 18, the key slot of the hollow shaft 3 is sleeved with a sleeve 22, and the sleeve 22 is sleeved with a driven wheel 5; the output end of the servo motor 4 fixedly arranged on the rotating support 2 is connected with a driving wheel 6; the transmission mechanism 7 is a belt transmission consisting of a driving wheel 6 and a driven wheel 5;
the pull rod 8 penetrates into the hollow shaft 3 and extends out of two ends of the hollow shaft 3, the upper end of the pull rod is fixedly connected to the fixed frame 10 and is connected with the hollow shaft 3 through the cylinder 15, and the lower end of the pull rod is fixedly connected with the manipulator 9; the pull rod 8 and the hollow shaft 3 form sliding fit through a key pin;
a manipulator fixing seat 11 is fixed on the outer wall of the lower ring of the hollow shaft 3, a fulcrum of the manipulator 9 is hinged to the bottom of the fixing seat 11 through a horizontal hinge shaft 21, and the upper end of the hollow shaft 3 is connected with a cylinder body of a cylinder 1915 through a fixing frame 20.
The grabbing and releasing control unit of the manipulator 9 comprises a pull rod 8, a fixed frame 10 and a cylinder 15;
the vertical movement control unit of the manipulator 9 comprises a hollow shaft 3, a fixed frame 20 and a cylinder 19, wherein the hollow shaft 3 is connected with the cylinder 19 through the fixed frame 20;
the horizontal rotation control unit of the manipulator 9 comprises a servo motor 4 and a transmission mechanism 7 thereof, a hollow shaft 3 and a manipulator fixing seat 11;
the horizontal rotation control unit of the manipulator 9 comprises a power device 13, a rotating shaft 12, a rotating support 2 and a hollow shaft 3.
The charging basket 14 is used as a galvanizing basket and a centrifugal zinc throwing basket, and after the workpieces in the charging basket 14 are galvanized, the workpieces do horizontal rotation movement, namely centrifugal zinc throwing movement, with the manipulator 9 at the position higher than the liquid level of the zinc liquid.
The galvanizing and centrifugal zinc throwing processes of the automatic hot galvanizing device are as follows:
a. after the workpieces are pretreated in the charging basket, the control piece 10 drives the pull rod 8 to move upwards, so that the manipulator 9 tightly grasps the charging basket 14 with the workpieces;
b. driven by a power device 13, the charging basket 14 is horizontally rotated to the upper part of the zinc pot through the matching of the rotating support 2 and the base 1.
c. The control piece 15 drives the pull rod and the hollow shaft 3 to move downwards, so that the manipulator 9 grasps the charging basket 14 to automatically galvanize workpieces in the basket, and a required zinc coating with consistent thickness is obtained by controlling the galvanizing time;
d. the control part 15 drives the pull rod and the hollow shaft 3 to move upwards, so that the charging basket 14 moves out of the zinc pot, and simultaneously the servo motor 4 and the transmission mechanism thereof drive the hollow shaft 3 to horizontally rotate, so that the charging basket 14 is driven to horizontally rotate, and the workpiece is centrifugally thrown zinc while being rapidly moved out of the zinc pot.
e. Driven by a power device 13, the charging basket 14 is horizontally rotated and moved away from the upper part of the zinc pot through the matching of the rotating support 2 and the base 1, and the water cooling process is carried out.
The charging basket 14 is used as a galvanizing basket and a centrifugal zinc throwing basket, and after the workpieces in the charging basket 14 are galvanized, the workpieces do horizontal rotation movement, namely centrifugal zinc throwing movement, with the manipulator 9 at the position higher than the liquid level of the zinc liquid.
Claims (2)
1. The automatic hot galvanizing process for the steel fastener sequentially comprises the working procedures of alkali washing, acid washing, water washing, plating assisting, drying, basket loading, galvanizing, centrifugal zinc throwing, water cooling, passivation, drying, packaging and the like, and is characterized in that: the galvanizing temperature is 450-480 ℃;
the galvanizing and centrifugal zinc throwing processes are automatically controlled, wherein the centrifugal zinc throwing is to lift the galvanized workpiece away from the liquid level of the zinc along with the galvanizing charging basket and make centrifugal motion along with the horizontal rotation of the galvanizing charging basket above the liquid level of the zinc.
2. The automatic hot galvanizing process for steel fasteners according to claim 1, characterized in that: the zinc plating and centrifugal zinc throwing process is automatically and continuously completed by an automatic hot galvanizing device of a steel fastener.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100795681A CN101368253A (en) | 2008-10-16 | 2008-10-16 | Automatic hot galvanizing technique for steel fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100795681A CN101368253A (en) | 2008-10-16 | 2008-10-16 | Automatic hot galvanizing technique for steel fastener |
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| Publication Number | Publication Date |
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| CN101368253A true CN101368253A (en) | 2009-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100795681A Pending CN101368253A (en) | 2008-10-16 | 2008-10-16 | Automatic hot galvanizing technique for steel fastener |
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| CN (1) | CN101368253A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101984129A (en) * | 2010-10-15 | 2011-03-09 | 宁波市鄞州计氏金属表面处理厂 | Galvanizing technology for high-strength fastening piece |
| CN103071969A (en) * | 2011-10-26 | 2013-05-01 | 朝友工业股份有限公司 | Method for manufacturing composite screw |
| CN105821363A (en) * | 2016-05-27 | 2016-08-03 | 昆山福亿特精密自动化设备有限公司 | Full-automatic hot galvanizing production line |
| CN106148870A (en) * | 2016-07-14 | 2016-11-23 | 安徽樵森电气科技股份有限公司 | A kind of irony extends ring surface galvanized method |
| CN106916932A (en) * | 2017-04-17 | 2017-07-04 | 浙江亦宸五金有限公司 | A kind of corrosion-resistant quenching technical of high-strength bolt |
| CN107245684A (en) * | 2017-05-15 | 2017-10-13 | 海盐哈特惠机械五金制品有限公司 | A kind of high-intensity fasteners hot dip galvanizing process |
| CN109594031A (en) * | 2018-12-14 | 2019-04-09 | 浙江格力威机械股份有限公司 | The technique zinc-plated to bolt surface |
| CN109797357A (en) * | 2019-02-02 | 2019-05-24 | 南京嘉迪紧固件制造有限公司 | A kind of fastener hot galvanizing method |
| CN110735100A (en) * | 2018-11-11 | 2020-01-31 | 海盐宝利机械有限公司 | rotary lifting type hot galvanizing continuous production system and production process |
| CN110923762A (en) * | 2019-12-11 | 2020-03-27 | 倪立秧 | Surface galvanizing treatment process for fastener |
| CN111262374A (en) * | 2020-03-20 | 2020-06-09 | 杭州宝玛机电有限公司 | Motor rear end cover and machining process thereof |
| CN112226716A (en) * | 2020-09-09 | 2021-01-15 | 余姚市永林机械科技有限公司 | Hot galvanizing suspension device |
| CN113430476A (en) * | 2021-05-14 | 2021-09-24 | 扬州传扬电缆材料有限公司 | Hot galvanizing treatment system for surface of galvanized steel sheet |
| CN113774303A (en) * | 2021-08-14 | 2021-12-10 | 江苏神舟灯饰有限公司 | Workpiece surface treatment process |
-
2008
- 2008-10-16 CN CNA2008100795681A patent/CN101368253A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101984129A (en) * | 2010-10-15 | 2011-03-09 | 宁波市鄞州计氏金属表面处理厂 | Galvanizing technology for high-strength fastening piece |
| CN103071969A (en) * | 2011-10-26 | 2013-05-01 | 朝友工业股份有限公司 | Method for manufacturing composite screw |
| CN105821363A (en) * | 2016-05-27 | 2016-08-03 | 昆山福亿特精密自动化设备有限公司 | Full-automatic hot galvanizing production line |
| CN106148870A (en) * | 2016-07-14 | 2016-11-23 | 安徽樵森电气科技股份有限公司 | A kind of irony extends ring surface galvanized method |
| CN106916932A (en) * | 2017-04-17 | 2017-07-04 | 浙江亦宸五金有限公司 | A kind of corrosion-resistant quenching technical of high-strength bolt |
| CN107245684B (en) * | 2017-05-15 | 2019-07-30 | 海盐哈特惠机械五金制品有限公司 | A kind of high-intensity fasteners hot dip galvanizing process |
| CN107245684A (en) * | 2017-05-15 | 2017-10-13 | 海盐哈特惠机械五金制品有限公司 | A kind of high-intensity fasteners hot dip galvanizing process |
| CN110735100A (en) * | 2018-11-11 | 2020-01-31 | 海盐宝利机械有限公司 | rotary lifting type hot galvanizing continuous production system and production process |
| CN109594031A (en) * | 2018-12-14 | 2019-04-09 | 浙江格力威机械股份有限公司 | The technique zinc-plated to bolt surface |
| CN109594031B (en) * | 2018-12-14 | 2021-03-23 | 浙江格力威机械股份有限公司 | Process for galvanizing surface of bolt |
| CN109797357A (en) * | 2019-02-02 | 2019-05-24 | 南京嘉迪紧固件制造有限公司 | A kind of fastener hot galvanizing method |
| CN110923762A (en) * | 2019-12-11 | 2020-03-27 | 倪立秧 | Surface galvanizing treatment process for fastener |
| CN111262374A (en) * | 2020-03-20 | 2020-06-09 | 杭州宝玛机电有限公司 | Motor rear end cover and machining process thereof |
| CN111262374B (en) * | 2020-03-20 | 2021-03-05 | 杭州宝玛机电有限公司 | Machining process of rear end cover of motor |
| CN112226716A (en) * | 2020-09-09 | 2021-01-15 | 余姚市永林机械科技有限公司 | Hot galvanizing suspension device |
| CN112226716B (en) * | 2020-09-09 | 2023-01-17 | 余姚市永林机械科技有限公司 | Hot galvanizing suspension device |
| CN113430476A (en) * | 2021-05-14 | 2021-09-24 | 扬州传扬电缆材料有限公司 | Hot galvanizing treatment system for surface of galvanized steel sheet |
| CN113774303A (en) * | 2021-08-14 | 2021-12-10 | 江苏神舟灯饰有限公司 | Workpiece surface treatment process |
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