CN103233225A - Hydraulic support piston rod microarc plasma fusion covering method - Google Patents
Hydraulic support piston rod microarc plasma fusion covering method Download PDFInfo
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- CN103233225A CN103233225A CN2013101782552A CN201310178255A CN103233225A CN 103233225 A CN103233225 A CN 103233225A CN 2013101782552 A CN2013101782552 A CN 2013101782552A CN 201310178255 A CN201310178255 A CN 201310178255A CN 103233225 A CN103233225 A CN 103233225A
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- piston rod
- cladding
- plasmatorch
- arc plasma
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Abstract
The invention relates to a hydraulic support piston rod microarc plasma fusion covering method which can be used for effectively realizing high abrasion resistance and high corrosion resistance of the piston rod surface, low cost and easiness in industrialized production. The method comprises the following steps of installing a piston rod to be machined on a microarc plasma fusion covering device, ensuring the distance from the bottom of a nozzle of a plasma torch to the piston rod to be 5 to 20mm, and ensuring the center of the nozzle to be deviated for 1 to 15mm from the opposite direction of the rotation of the piston rod; loading the fusion covering alloy powder into a powder conveying device, controlling and setting fusion covering parameters through a controller, setting the power conveying quantity at 15 to 100g/min, setting the flow rate of the ionizing air and the powder at 0.4 to 1.0m<3>/h, setting the fusion covering current at 30 to 300A, setting the fusion covering speed at 200 to 800mm/min, setting the swing amplitude at 10 to 50mm, setting the flow rate of the cooling water at 0.4 to 1.5 m<3>/h, setting the lapping rate at 10 to 40 percent, setting the induction preheating temperature of an induction coil in front of the plasma torch at 100 to 300 DEG C, setting the current of a rear preserving coil at 10 to 80 A, and preparing an alloy fusion covering layer with the thickness of 0.5 to 2.0mm; and machining the surface of the fusion covering layer of the piston rod to reach the brightness of a mirror face. The method is simple, easy to operate, good in fusion covering effect, high in strength, strong in corrosion resistance and low in cost.
Description
Technical field
The present invention relates to mechanical workout, particularly a kind of hydraulic support piston rod micro arc plasma cladding method.
Background technology
Comprehensive mechanical coal mining is the sign of coal mining technical progress, is that the colliery increases output, increases work efficiency, increases the important means of economic benefit.Hydraulic support is the important component part of fully-mechanized mining equipment, because the Working environment of getting working face is more abominable under the coal mine, relative humidity is almost 100% in the coal seam, is comprising a large amount of SO
2, H
2CO
3And Cl
2Etc. objectionable impurities, when under this environment, working, the hydraulic support piston rod will be subjected to the multiple action of bump, corrosive medium and the hydraulic support emulsion of hard coal cinder, its friction section surface forms defectives such as pockmark, scuffing, corrosion because of wearing and tearing and intergranular corrosion, influence sealing effectiveness, cause piston rod to be scrapped because lifting force descends, even cause whole coal-face to stop production, financial loss is huge.
At home, plating Chrome is one of common surface treatment mode of hydraulic support piston rod, but this technology all causes ill effect to HUMAN HEALTH and environment, and plating Chrome layer is prone to peeling and decortication phenomenon, and effect is also not obvious.In addition, bulletin 102677044A, 102777193A, 101942657A, 102703899A, patents such as 101338427 all adopt laser melting and coating technique that hydraulic support piston rod friction section is handled, all obtained good effect, significantly improved the work-ing life of piston rod, but also exist equipment price costliness, floor space big, be unfavorable for problem such as industrialization promotion.
Summary of the invention
At above-mentioned situation, for overcoming the prior art defective, the invention provides a kind of hydraulic support piston rod micro arc plasma cladding method, effectively solve piston rod surface abrasion-proof corrosion-proof performance height, save cost, be easy to realize the problem of suitability for industrialized production.
The technical scheme that the present invention solves is to be realized by following steps:
(1) hydraulic support piston rod surface pre-treatment
Remove greasy dirt, the impurity on hydraulic support piston rod friction section to be processed surface;
(2) at micro arc plasma cladding equipment processed piston rod is installed, the nozzle bottom of safeguarding plasmatorch on the adjustment micro arc plasma cladding equipment and the height of piston rod are 5-20mm, and the opposite direction of nozzle center and piston rod rotation departs from 1-15mm;
(3) preparation cladding alloy powder, cladding alloy powder particle diameter is 75 ~ 250 μ m, is that Fe forms by weight meter: 0.1 ~ 0.2%C, 0.5 ~ 2.0%B, 0.5 ~ 2.0%Si, 10 ~ 20%Cr, 5 ~ 25%Ni, 0.5 ~ 3.0%Mo, 1 ~ 4%Nb and surplus;
(4) the cladding alloy powder is packed in the powder feeder of micro arc plasma cladding equipment, the cladding parameter is set in via controller control, wherein powder sending quantity carries out micro arc plasma cladding processing for the piston rod friction section, is 15 ~ 100g/min with powder sending quantity, and ion gas and powder feeding flow are adjusted to 0.4 ~ 1.0m
3/ h, the cladding electric current is adjusted to 30 ~ 300A, and cladding speed is adjusted to 200 ~ 800mm/min, and amplitude of fluctuation is 10 ~ 50mm, and cooling water flow is controlled at 0.4 ~ 1.5m
3/ h, overlapping rate is controlled 10 ~ 40%, and the induction preheating temperature of plasmatorch front ruhmkorff coil is set in 100 ~ 300 ℃, and the current settings of back insulation coil is at 10 ~ 80A, the thick alloy cladding layer of preparation 0.5 ~ 2.0mm;
(5) set the cladding parameter, wherein powder sending quantity is 15 ~ 100g/min, and the gas flow of ions amount is 0.4 ~ 1.0m
3/ h, cladding electric current are 30 ~ 300A, and cladding speed is 200 ~ 800mm/min, and amplitude of fluctuation is 10 ~ 50mm, and cooling water flow is controlled at 0.4 ~ 1.5m
3/ h, overlapping rate is controlled 10 ~ 40%, and the induction preheating temperature of plasmatorch front ruhmkorff coil is set in 100 ~ 300 ℃, and the current settings of back insulation coil is at 10 ~ 80A, the alloy layer that cladding 0.5 ~ 2.0mm is thick;
(6) open micro arc plasma cladding equipment;
By technical parameter and the working routine set piston rod surface is carried out cladding;
(7) piston rod cladding layer surface is machined into mirror-finishing.
The inventive method is simple, and is easy to operate, and cladding is effective, the intensity height, and corrosion resistance nature is strong, and cost is low, is the innovation on the hydraulic support piston rod is produced.
Description of drawings
Fig. 1 is process flow sheet of the present invention;
Fig. 2 is the structure assembling front view of production unit of the present invention;
Fig. 3 is cladding back piston bar structure iron of the present invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.
Provided by Fig. 1-3, the present invention is when concrete production, utilize micro arc plasma Shu Zuowei thermal source, piston rod surface forms 0.5 ~ 2mm and is the alloy cladding layer of metallurgical binding with it, this alloy cladding layer densification, even, pore-free, crackle have excellent wear-corrosion resistance, and concrete performing step is as follows:
(1) greasy dirt, the impurity on removing hydraulic support piston rod to be processed 1 friction section surface;
(2) hydraulic support piston rod 1 to be processed is installed on the chuck 8 of micro arc plasma cladding equipment, and by tailstock 11 its central positions of control, the position of the nozzle of adjustment plasmatorch 3 is 5 ~ 20mm apart from the height of piston rod 1, the opposite direction of the nozzle center of ion torch 3 and piston rod 1 rotation departs from 1 ~ 15mm, powdered alloy is filled in the powder feeder 5 then;
(3) piston rod 1 friction section is carried out the micro arc plasma cladding and handle, open the switch of argon bottle 12, regulate the housing 13 of cladding equipment, the powder sending quantity that makes powder feeder 5 is 15 ~ 100g/min, and ion gas and powder feeding flow are 0.4 ~ 1.0m
3/ h(annotates: what ion gas herein come from, and to have provided powder sending quantity be 15 ~ 100g/min in the front in addition, and how occurring ion gas and powder sending quantity here again is 0.4 ~ 1.0m
3/ h please illustrate or revise), the cladding electric current is 30 ~ 300A, the cladding speed of plasmatorch 3 is 200 ~ 800mm/min, and the amplitude of fluctuation of wig-wag 4 is 10 ~ 50mm, and the voltage of swing motor is 10 ~ 50V, chuck 8 rotating speeds are 0.3 ~ 3.0r/min, and cooling water flow is 0.4 ~ 1.5m
3/ h;
(4) start button of unlatching housing 13, micro arc plasma power supply 14, cooler 15, argon gas 12, powder feeder 5, wig-wag 4, plasmatorch 3, the rotary power head 10 of motor, the co-ordination under controller control of chuck 8 and tailstock 11, rotary power head 10 drive chucks 8 of motor provide stable power for the rotation of piston rod 1, micro arc plasma power supply 14 is that plasmatorch 3 power supplies produce plasma beam, the induction preheating temperature of the induction coil 6 before the induction power supply 16 control plasmatorchs 3 is set between 100 ~ 300 ℃, the current settings of back insulation coil 7 is between 10 ~ 80A, cross motor on the cladding lathe 9 drives plasmatorch and laterally moves along crossbeam, wig-wag 4 control plasmatorchs 3 side throw amplitude and frequencies, powdered alloy forms overlapping rate control by plasmatorch 3 between 10 ~ 40% on piston rod 1 surface under the control of powder feeder 5, be prepared into the thick cladding alloy layer of 0.5 ~ 2.0mm;
(5) piston rod cladding layer 2 outside surfaces are carried out mechanical workout, utilize cutter 17 and ultrasonic wave to roll grinding device 18(existing installation at the cladding lathe 9 of micro arc plasma cladding equipment) carry out machine-shaping and reach mirror-finishing.
Described powdered alloy particle diameter is 75 ~ 250 μ m, and by by weight: 0.1 ~ 0.2%C, 0.5 ~ 2.0%B, 0.5 ~ 2.0%Si, 10 ~ 20%Cr, 5 ~ 25%Ni, 0.5 ~ 3.0%Mo, 1 ~ 4%Nb and surplus be that Fe forms.
Described hydraulic support piston rod alloy cladding layer 2 is metallurgical binding with piston rod 1 outside surface, and the single track width is 10 ~ 50mm, described single track width refer to the piston rod outside surface when rotating a week by the width of a cladding.
Described micro arc plasma cladding equipment is provided by Fig. 2, comprise the cladding lathe, powder feeder, argon bottle, cooler, wig-wag, plasmatorch, chuck and controller (housing), there is tailstock cladding lathe 9 upper backs, the rotary power head 10 of motor and the chuck 8 that links to each other with rotary power head are equipped with through the power supporting seat in cladding lathe 9 front portions, processed piston rod 1 periphery that is equipped with 11 of chuck 8 and tailstocks is equipped with preceding ruhmkorff coil 6 respectively, back insulation coil 7 and plasmatorch 3, plasmatorch 3 links to each other with powder feeder 5 on being contained in cladding lathe 3 upper stand through wig-wag 4, controller 13 links to each other with the micro arc plasma power supply, micro arc plasma power supply 14 links to each other with plasmatorch 3, plasmatorch 3 links to each other with water cooling unit 15, preceding ruhmkorff coil 6, back ruhmkorff coil 7 links to each other controller and argon bottle 12 with the power supply 16 that is used for induction respectively with controller 13, cooling-water machine 15, the power supply 16 that is used for induction links to each other.
By above-mentioned situation as can be seen, the present invention has the alloy cladding layer of high wear resistant performance in the preparation of hydraulic support piston rod friction section by the micro arc plasma melting and coating technique, can effectively solve the hydraulic support piston rod is being subjected under the multiple actions such as hard coal cinder bump, corrosive medium corrosion, problems such as pockmark, scuffing, corrosion appear in its friction section surface, can significantly improve physical strength, the wear-corrosion resistance of hydraulic support piston rod and prolong its work-ing life.Compared with prior art have following outstanding characteristics:
(1) the present invention is pollution-free and cost is low, can reduce cost more than 50%, effectively substitutes present with serious pollution Du Chrome technology and expensive laser melting and coating technique;
(2) the powdered alloy formulating of recipe is original rationally, has both increased the preceding degree of piston rod, makes the piston rod surface after the processing have high wear-corrosion resistance again, be original 10-20 doubly, hardness is 40-65HRC, has prolonged work-ing life greatly;
(3) the inventive method simplicity of design is easy to operate, can manufacture, and production efficiency improves more than 5 times, has remarkable economic efficiency and social benefit.
Claims (3)
1. hydraulic support piston rod micro arc plasma cladding method, it is characterized in that, utilize micro arc plasma Shu Zuowei thermal source, piston rod surface forms the cladding alloy layer of metallurgical binding, this cladding metallurgy layer densification, even, pore-free, flawless have excellent wear-corrosion resistance, and concrete performing step is as follows:
(1), removes greasy dirt, the impurity on hydraulic support piston rod to be processed (1) friction section surface;
(2), hydraulic support piston rod to be processed (1) is installed on the chuck (8) of micro arc plasma cladding equipment, and control its central position by tailstock (11), the position of adjustment plasmatorch (3) nozzle is 5 ~ 20mm apart from the height of piston rod (1), the opposite direction of the nozzle center of plasmatorch (3) and piston rod (1) rotation departs from 1 ~ 15mm, then powdered alloy is filled in the powder feeder (5);
(3), piston rod (1) friction section being carried out the micro arc plasma cladding handles, open the switch of argon bottle (12), regulate the housing (13) of cladding equipment, the powder sending quantity that makes powder feeder (5) is 15 ~ 100g/min, and ion gas and powder feeding flow are 0.4 ~ 1.0m
3/ h(annotates: what ion gas herein come from, and to have provided powder sending quantity be 15 ~ 100g/min in the front in addition, and how occurring ion gas and powder sending quantity here again is 0.4 ~ 1.0m
3/ h please illustrate or revise), the cladding electric current is 30 ~ 300A, the cladding speed of plasmatorch (3) is 200 ~ 800mm/min, and the amplitude of fluctuation of wig-wag (4) is 10 ~ 50mm, and the voltage of swing motor is 10 ~ 50V, chuck (8) rotating speed is 0.3 ~ 3.0r/min, and cooling water flow is 0.4 ~ 1.5m
3/ h;
(4), open the start button of housing (13), micro arc plasma power supply (14), cooler (15), argon gas (12), powder feeder (5), wig-wag (4), plasmatorch (3), the rotary power head of motor (10), the co-ordination under controller control of chuck (8) and tailstock (11), the rotary power head of motor (10) drive chuck (8) provides stable power for the rotation of piston rod (1), micro arc plasma power supply (14) is that plasmatorch (3) power supply produces plasma beam, the induction preheating temperature of the induction coil (6) that induction power supply (16) control plasmatorch (3) is preceding is set between 100 ~ 300 ℃, the electric current of back insulation coil (7) is 10 ~ 80A, cross motor on the cladding lathe (9) drives plasmatorch and laterally moves along crossbeam, wig-wag (4) control plasmatorch (3) side throw amplitude and frequency, powdered alloy forms overlapping rate control 10 ~ 40% by plasmatorch (3) on piston rod (1) surface under the control of powder feeder (5), be prepared into the thick cladding alloy layer of 0.5 ~ 2.0mm;
(5), piston rod cladding layer (2) outside surface is carried out mechanical workout, utilizing cutter (17) and ultrasonic wave to roll grinding device (18) at the cladding lathe (9) of micro arc plasma cladding equipment carries out machine-shaping and reaches mirror-finishing;
Described powdered alloy particle diameter is 75 ~ 250 μ m, and by by weight: 0.1 ~ 0.2%C, 0.5 ~ 2.0%B, 0.5 ~ 2.0%Si, 10 ~ 20%Cr, 5 ~ 25%Ni, 0.5 ~ 3.0%Mo, 1 ~ 4%Nb and surplus be that Fe forms.
2. hydraulic support piston rod micro arc plasma cladding method according to claim 1, it is characterized in that, described hydraulic support piston rod alloy cladding layer (2) is metallurgical binding with piston rod (1) outside surface, the single track width is 10 ~ 50mm, described single track width refer to the piston rod outside surface when rotating a week by the width of a cladding.
3. hydraulic support piston rod micro arc plasma cladding method according to claim 1, it is characterized in that, described micro arc plasma cladding equipment, its structure is to comprise the cladding lathe, powder feeder, argon bottle, cooler, wig-wag, plasmatorch, chuck and controller (housing), there is tailstock cladding lathe (9) upper back, the anterior rotary power head (10) and the chuck that links to each other with rotary power head (8) that motor is housed through the power supporting seat of cladding lathe (9), processed piston rod (1) periphery is housed between chuck (8) and tailstock (11) preceding ruhmkorff coil (6) is housed respectively, back insulation coil (7) and plasmatorch (3), plasmatorch (3) links to each other with powder feeder (5) on being contained in cladding lathe (3) upper stand through wig-wag (4), controller (13) links to each other with the micro arc plasma power supply, micro arc plasma power supply (14) links to each other with plasmatorch (3), plasmatorch (3) links to each other with water cooling unit (15), preceding ruhmkorff coil (6), back ruhmkorff coil (7) links to each other controller and argon bottle (12) with the power supply (16) that is used for induction respectively with controller (13), cooling-water machine (15), the power supply (16) that is used for induction links to each other.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556147A (en) * | 2013-11-26 | 2014-02-05 | 张兵权 | Method for preparing composite ceramic alloy layer on grinding roller/lining tile through plasma wire filling and powder feeding |
| CN103866221A (en) * | 2014-04-01 | 2014-06-18 | 焦作市华科液压机械制造有限公司 | Remanufacturing process for piston rod of supporting type coal mine hydraulic support through induction, preheating and cladding |
| CN104475949A (en) * | 2014-10-26 | 2015-04-01 | 北京工业大学 | Method for machining hydraulic support column through outwards-feeding plasma fusing and preparation method of flux-cored wire applied to same |
| CN106011843A (en) * | 2016-06-29 | 2016-10-12 | 宜兴市鑫源辊业有限公司 | Method for plasma cladding on matrix surface |
| CN109296588A (en) * | 2018-12-10 | 2019-02-01 | 徐工集团工程机械有限公司 | A kind of piston rod and hydraulic cylinder |
| CN111235516A (en) * | 2020-01-15 | 2020-06-05 | 烟台军恒工程机械设备有限公司 | Plasma cladding method for hydraulic drill rod |
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| CN107584199B (en) * | 2017-09-27 | 2019-12-24 | 洛阳骄一新材料科技有限公司 | Wire-filling injection integrally-molded three-layer composite board and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556147A (en) * | 2013-11-26 | 2014-02-05 | 张兵权 | Method for preparing composite ceramic alloy layer on grinding roller/lining tile through plasma wire filling and powder feeding |
| CN103866221A (en) * | 2014-04-01 | 2014-06-18 | 焦作市华科液压机械制造有限公司 | Remanufacturing process for piston rod of supporting type coal mine hydraulic support through induction, preheating and cladding |
| CN104475949A (en) * | 2014-10-26 | 2015-04-01 | 北京工业大学 | Method for machining hydraulic support column through outwards-feeding plasma fusing and preparation method of flux-cored wire applied to same |
| CN104475949B (en) * | 2014-10-26 | 2016-09-14 | 北京工业大学 | A kind of method of outer wire feed plasma cladding processing hydraulic bracket upright post |
| CN106011843A (en) * | 2016-06-29 | 2016-10-12 | 宜兴市鑫源辊业有限公司 | Method for plasma cladding on matrix surface |
| CN109296588A (en) * | 2018-12-10 | 2019-02-01 | 徐工集团工程机械有限公司 | A kind of piston rod and hydraulic cylinder |
| CN111235516A (en) * | 2020-01-15 | 2020-06-05 | 烟台军恒工程机械设备有限公司 | Plasma cladding method for hydraulic drill rod |
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