CN108406045A - Cylinder jack piston rod cladding overlaying method - Google Patents
Cylinder jack piston rod cladding overlaying method Download PDFInfo
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- CN108406045A CN108406045A CN201810182496.7A CN201810182496A CN108406045A CN 108406045 A CN108406045 A CN 108406045A CN 201810182496 A CN201810182496 A CN 201810182496A CN 108406045 A CN108406045 A CN 108406045A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/044—Built-up welding on three-dimensional surfaces
- B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
- B23K9/048—Built-up welding on three-dimensional surfaces on surfaces of revolution on cylindrical surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
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Abstract
The present invention provides a kind of cylinder jack piston rod cladding overlaying method, it is equipped with welding gun and welding gun energizing circuit, welding gun front end is equipped with welding gun heating zone, welding gun energizing circuit includes welding gun excitation power source, welding gun is formed into a loop with welding gun energizing circuit by welding base metal, it is additionally provided with welding wire conveying device and welding wire heater circuit, welding wire heater circuit can adjust the length of welding wire front end conveying heated filament section, it is heated to certain temperature to control welding wire front end conveying heated filament section, it often will appear different degrees of corrosion which solve piston rod surface, spot is cheated, coating falls off, surface wear scratches the technical issues of making jack leakage or drainage.It the composite can be widely applied to the reparation and making of oil cylinder of hydraulic support jack piston rod.
Description
Technical field
The present invention relates to a kind of piston rod and its manufacture craft and devices, more particularly to a kind of cylinder jack piston rod
Cladding overlaying method.
Background technology
Hydraulic support is to realize that the movements such as lifting Forward, the equipment for carrying out roof timbering are coal mine synthesis with hydraulic power
The key equipment of mechanical mining is the important ring that Modern coal mines realize all process steps full mechanizations such as transport and supporting of mining
Section.Hydraulic support significantly reduces the labor intensity of worker, protects to greatest extent in the use of underground coal mine performing comprehensive coal mining working face
The life security of coal miner and the safety of coal working face are hindered.
Hydraulic support includes oil cylinder of hydraulic support jack, and the critical component of jack is jack piston rod.Due to well
Lower working environment is special, and underground humidity is big (relative humidity about 75% or more), and sulfur dioxide, hydrogen sulfide etc. are contained in underground air
Toxic and harmful gas, the dust containing corrosive deposits such as sulphur is also more, forms underground complicated special acidity and alkaline corrosion
Media operation environment.Piston rod works in such a case for a long time, and surface absorbs impact and corrodes, and often will appear in various degree
Corrosion, spot hole and coating the surface defects such as fall off, seriously affect the sealing performance of hydraulic cylinder, cause hydraulic cylinder and using
It fails in the process；In addition, piston rod is during frequent use, because part is collided with or coal slag granules impact also results in outer surface
Abrasion is scratched and fail, and burn into impact and abrasion can all cause coating to fall off to lead to bad seals, to make jack leakage or
Drainage influences holder entirety performance, causes working face that cannot normally produce, and the safety coefficient of production environment substantially reduces.
Existing jack piston rod generally uses low-carbon alloy steel in 40Cr etc. to be made through Overheating Treatment, mechanical processing,
To prevent from getting rusty, machine-shaping rear surface chromium plating, diameter of piston rod is generally 40-180mm, and length is generally 300mm-
1200mm.Piston rod usage quantity in coal production is big, adopts new technology and is repaired to the piston rod of failure, is made simultaneously
New piston rod, improves that piston rod surface is wear-resisting, corrosion-resistant, shock resistance, extends the service life of column, has important
Meaning.
It is existing repair piston rod technique include electric arc spraying, plasma cladding, laser cladding, gas shielded weldering etc., it is each
Kind technique has the characteristics that：
1, be the advantages of electric arc spraying process efficiently, material low cost, equipment investment is few；The disadvantage is that coating is combined with base material
It is bad, be easy to fall off, at present the technique holder repair field be eliminated.
2, the advantages of plasma cladding technique is that efficient, coating and base material are firmly combined with, and coating quality is high, is used after reparation
Long lifespan, dilution rate are about 5%, and dilution rate is low, save rare metal；The disadvantage is that equipment investment is high, exist every about platform equipment
Million yuan or more, coating material is of high cost, and per kilogram cost is complicated for operation at hundred yuan or more, is not easy to grasp.Most fatal weakness
It is that current domestic welding gun quality is unqualified, it is difficult to which long time continuous working, more dependence import welding guns are expensive.
3, it is that coating and base material are firmly combined with the advantages of laser cladding process, dilution rate is low, generally zero dilution rate, filling
The performance of material is used effectively, and coating quality is high, and service life is long after reparation；The disadvantage is that equipment investment is high, single-piece reparation at
This height.
4, gas shielded Welding mainly uses solid core welding wire gas shielded to weld, which is currently widely used for piston rod and repaiies
Multiple, but there are the following problems：
(1) one is carbon steel solid core welding wire boxing resizing, then chromium plating anticorrosion, but chrome layer due to hardness is high,
Brittleness is larger, and crackle easily occurs when layers of chrome is impacted, and it is unstable to easily cause blistering, corrosion, corrosion resistance；Plating causes water source
The destruction of pollution and environment；Electroplating technology can not local route repair, whole root post coating need to be integrally electroplated, increase repair at
This.
(2) welderings such as another kind is welded using solid core chromium nickel stainless steel welding wire gas shielded, and this method easy tos produce stomata, is mingled with
Defect is connect, first-time qualification rate is low, and subsequent soldering workload is very big.Some tiny defect naked eyes are difficult to find, if comprehensively
Flaw detection, certainly will increase cost, while production efficiency can also substantially reduce.In addition, the process dilution rate is high, about 30%
Left and right, chromium nickel stainless steel active ingredient are diluted, and rustproof property declines.
To sum up, plasma and laser cladding surfacing layer quality are high, but equipment investment amount is big, it is difficult to popular popularization；
Gas shielded welds efficient, small investment, but there are surfacing layer quality defect, first-time qualification rate is low, secondary soldering heavy workload.
Invention content
The present invention is directed to technical problem present in the above oil cylinder of hydraulic support jack piston rod reparation and manufacture craft,
It provides that a kind of surface abrasion resistance, corrosion-resistant, shock resistance is strong, piston rod service life can be extended, while processing cost is low, processed
It is efficient, dilution rate low oil cylinder of hydraulic support jack piston rod cladding overlaying method and device when welding, and by the work
The jack piston rod that skill and device are produced, this method can be used for repairing damaged piston rod, can be used for making
Make new piston rod.
For this purpose, the technical scheme is that, a kind of cylinder jack piston rod cladding overlaying method, including following technique
Step：
(1) preparatory process includes the following steps：
The chrome layer on oil cylinder of hydraulic support jack piston rod surface to be repaired is removed；
Oil cylinder of hydraulic support jack piston rod to be repaired is preheating to 200 DEG C ± 10 DEG C；
Oil cylinder of hydraulic support jack piston rod to be repaired is fixed on rotatable device, allow piston rod around
The rotation centerline of rotatable device rotates；
(2) welding gun adjusts process with welding wire and includes the following steps：
The end of adjustment welding wire front end conveying heated filament section is located inside welding gun heating zone, and welding wire front end conveys the end of heated filament section
End is 2mm-5mm at a distance from welding gun central axes and welding base metal intersection point；
The welding wire length for adjusting welding wire front end conveying heated filament section is 10mm-20mm；
Adjustment welding gun central axes overlap or adjust with oil cylinder of hydraulic support jack piston rod vertical axis to be repaired
Inclination angle arrangement, welding gun central axes and oil cylinder of hydraulic support to be repaired are formed between welding gun central axes and welding base metal vertical axis
The welding gun inclination angle formed between jack piston rod vertical axis is 5 ° ± 2 °；
Adjust the axis of welding wire front end conveying heated filament section and oil cylinder of hydraulic support jack piston rod trunnion axis to be repaired
Line is parallel or adjustment welding wire front end conveys the axis of heated filament section and oil cylinder of hydraulic support jack piston rod level to be repaired
Welding wire feeding angle is formed between axis, welding wire front end conveys the axis of heated filament section and oil cylinder of hydraulic support jack to be repaired
The welding wire feeding angle formed between piston rod horizontal axis is 5 ° ± 2 °；
Welding wire heating power supply is connected, the welding wire that heated filament section is conveyed to welding wire front end heats, and welding wire front end is kept to convey heated filament
Section is heated to 100-300 DEG C of temperature before entering molten bath；
Start to convey argon gas；
Start welding gun water-cooling system and Water-cooling circulating is provided；
(3) cladding built-up welding welding sequence includes the following steps：
High frequency ignites welding gun electric arc；
Start rotatable device rotation, drives oil cylinder of hydraulic support jack piston rod to be repaired to rotate, when to be repaired
For oil cylinder of hydraulic support jack piston rod when being rotated on rotatable device, welding gun can be vertical along piston rod outer surface to be repaired
To movement, the plumb joint of welding gun forms screw with piston rod to be repaired, and welding wire is completed with spiral trajectory to be repaired
The cladding built-up welding of oil cylinder of hydraulic support jack piston rod outer surface is welded；
(4) cladding built-up welding welding completion process includes the following steps：
When welding gun reaches oil cylinder of hydraulic support jack piston rod tail end to be repaired, welding wire is all by hydraulic pressure to be repaired
After the completion of holder cylinder jack piston rod outer surface cladding built-up welding, welding gun and welding wire stop conveying, and welding gun electric current starts to decay
Until extinguishing；
Welding gun argon gas stops gas supply；
Welding gun water-cooling system stops Water-cooling circulating；
Rotatable device stops；
Cladding built-up welding welding is completed.
Preferably, the end of adjustment welding wire front end conveying heated filament section is located at using welding gun central axes direction as cylindrical center's line
The virtual cylinder external surface of a diameter of φ 10mm ± 2mm is along welding gun central axes direction projection to hydraulic support oil to be repaired
The interior zone of cylinder jack piston rod outer surface profile line, welding gun front end and oil cylinder of hydraulic support jack piston to be repaired
The distance of bar is 10mm ± 3mm.
Preferably, the end of adjustment welding wire front end conveying heated filament section is located at welding gun heating zone and is radiated hydraulic pressure branch to be repaired
The outermost endpoint location of frame cylinder jack piston rod outer surface profile line.
Preferably, adjustment welding gun heating zone is radiated the area of oil cylinder of hydraulic support jack piston rod outer surface to be repaired
Domain and welding wire front end conveying heated filament section convey the axis projections of heated filament section to oil cylinder of hydraulic support to be repaired along welding wire front end
The region of jack piston rod outer surface is simultaneously in 30 ° ± 10 ° fan-shaped welding regions.
Preferably, rotatable device rotation makes the linear velocity of oil cylinder of hydraulic support jack piston rod outer surface to be repaired
For 300-400mm/min；Oil cylinder of hydraulic support jack piston rod per revolution to be repaired, welding gun is along piston to be repaired
Rod outer surface longitudinal movement distance is 4-6mm.
Preferably, in cladding built-up welding welding sequence, the technological parameter of deposition built-up welding is default as follows：
A. argon gas valve regulated throughput is opened；
B. welding current：200-230A；
C. weldingvoltage：Direct current 14-17V；
D. the throughput of argon gas：6L/min ± 10%；
E. the welding wire electric current of welding wire front end conveying heated filament section：50-100A；
F. the wire feed rate of welding wire：1.8m/min ± 10%.
It preferably, will after the completion of the cladding built-up welding welding of oil cylinder of hydraulic support jack piston rod outer surface to be repaired
Cladding built-up welding soldered piston rod in outer surface is removed, and cladding built-up welding soldered piston rod setting in outer surface is put
It sets, realizes natural cooling.
Preferably, after cladding built-up welding soldered piston rod in outer surface being cooled to room temperature, piston rod surface is carried out
Processing, and reserved 0.3mm-0.5mm surpluses, then grinding is carried out to the size needed to piston rod outer surface.
Preferably, the cladding built-up welding throat thickness of the oil cylinder of hydraulic support jack piston rod outer surface of reparation is 2.0mm-
2.5mm。
Preferably, solder wire material is austenitic stainless steel material.
Present invention has the advantages that since welding base metal is alloy carbon steel material, solder deposition overlay cladding is that chromium nickel is stainless
Steel material, the atom bound fraction that cladding heap is welded in the molten drop of welding base metal outer surface and molten bath is formed can be outside welding base metal
Surface, which is formed, arranges close Spiral distribution, the outer surface of the oil cylinder of hydraulic support jack piston rod of reparation is wear-resisting, it is corrosion-resistant,
Shock resistance is strong, can extend piston rod service life, while processing cost is low, high in machining efficiency, and dilution rate is low when welding
Oil cylinder of hydraulic support jack piston rod cladding overlaying method and a kind of jack piston rod, this method can be used for repairing broken
The piston rod of damage can be used for making new piston rod.
Description of the drawings
Fig. 1 is the structural schematic diagram of the embodiment of the present invention；
Fig. 2 is enlarged drawing 1 at the J of Fig. 1；
Fig. 3 is the schematic diagram of welding wire heater circuit；
Enlarged drawing 2 at the J of Fig. 4 Fig. 1；
Fig. 5 is piston rod vertical view；
Fig. 6 is the structural schematic diagram of the oil cylinder of hydraulic support jack piston rod after repairing.
Symbol description in figure：
1. welding base metal；2. welding wire front end conveys heated filament section；3. welding wire conduction regulating device；4. welding wire conveying device；5.
Welding wire；6. welding wire heating power supply；7. welding gun excitation power source；8. welding base metal direction of rotation；9. solder deposition overlay cladding；10. molten
Pond；11. welding gun；12. welding gun inclination angle；13. welding gun heating zone；14. molten drop；15. welding wire heater circuit；16. welding gun energizing circuit；
17. welding gun central axes；18. welding base metal vertical axis；19. welding base metal horizontal axis；20. fan-shaped welding region；21. very heavy
Push up piston rod；22. welding wire feeding angle；23. welding base metal central axis；24. welding gun heating zone is radiated welding base metal appearance
The region in face；25. welding gun heating zone is radiated the outermost endpoint location of welding base metal outer surface profile line.
Specific implementation mode
The present invention is described further with reference to embodiment.
Embodiment
Fig. 1-Fig. 6 is a kind of reality of oil cylinder of hydraulic support jack piston rod cladding build-up welding apparatus and processing technology of the present invention
Apply example.
As shown in Figure 1, a kind of oil cylinder of hydraulic support jack piston rod cladding build-up welding apparatus of the present invention, is equipped with 11 He of welding gun
Welding gun energizing circuit 16,11 front end of welding gun are equipped with welding gun heating zone 13, and welding gun energizing circuit 16 includes welding gun excitation power source 7, weldering
Rifle 11 is formed into a loop with welding gun energizing circuit 16 by welding base metal 1；It is defeated to can also be seen that the device is additionally provided with welding wire in Fig. 1
Send device 4 and welding wire heater circuit 15, welding wire conveying device 4 that the feeding of welding wire 5 may be implemented, welding wire heater circuit 15 includes weldering
Silk heating power supply 6,4 front end of welding wire conveying device are equipped with welding wire conduction regulating device 3, are set to 3 front end of welding wire conduction regulating device
Welding wire 5 close to 1 side of welding base metal is that welding wire front end conveys heated filament section 2, and welding wire heater circuit 15 is adjusted by welding wire conduction
Welding wire front end conveying heated filament section 2 and welding base metal 1 are formed into a loop by device 3, before welding wire conduction regulating device 3 can adjust welding wire
The length of end conveying heated filament section 2 is heated to certain temperature to control welding wire front end conveying heated filament section 2.
The embodiment can overlap welding gun central axes 17 with welding base metal vertical axis 18, welding gun central axes 17 and welding
When base material vertical axis 18 overlaps, welding gun heating zone 13 is radiated the peak of welding base metal 1, at the peak of welding base metal 1
Molten bath 10 can be formed, molten bath 10 basically forms symmetrical relative to welding base metal vertical axis 18；Welding wire front end conveys heated filament
The axis of section 2 is parallel with welding base metal horizontal axis 19, and the front end of welding wire front end conveying heated filament section 2 is located at welding gun heating zone 13
Region, molten drop can be formed in 13 part of welding gun heating zone by being heated to the end of the welding wire front end conveying heated filament section 2 of certain temperature
14, the outer surface of welding base metal 1 can be thermally formed molten bath 10 by welding gun heating zone 13, and molten bath 10, which can be adsorbed, to be heated to centainly
The molten drop 14 that the welding wire front end conveying heated filament section 2 of temperature is formed in 13 part of welding gun heating zone, molten drop 14 form original with molten bath 10
Son combines, and molten drop 14 forms the outer surface that atom bound fraction cladding heap is welded in welding base metal 1, molten drop 14 and molten bath with molten bath 10
10 formation are firmly attached, while being securely attached together with the base material of welding base metal 1.
In the embodiment, Fig. 1 and Fig. 2 can be seen that welding gun heating zone 13 be radiated 1 outer surface of welding base metal region and
It is same along the region of axis projections to 1 outer surface of welding base metal of welding wire front end conveying heated filament section 2 that welding wire front end conveys heated filament section 2
When be located in the fan-shaped welding regions in -45 ° of 0 ° of welding base metal vertical axis side, can ensure that the welding wire front end heated is defeated in this way
Heated filament section 2 is sent to be constantly in the heating region of welding gun heating zone 13, the front end that welding wire front end conveys heated filament section 2 is very easy to shape
At molten drop 14, molten drop 14 can be continuously combined with the molten bath 10 that the outer surface of welding base metal 1 is thermally formed；The embodiment
In, inclination angle arrangement, welding gun central axes 17 and welding can will be formed between welding gun central axes 17 and welding base metal vertical axis 17
The welding gun inclination angle 12 formed between base material vertical axis 18 is 5 ° ± 2 °, due to welding gun central axes 17 and welding base metal vertical axis
The welding gun inclination angle 12 formed between 18 is 5 ° ± 2 °, it can be seen that, A is welding gun inclination angle 22 in Fig. 1, and welding gun inclination angle 22 is located at welding
The side of base material vertical axis 18；Such design basically forms symmetrically with molten bath 10 relative to welding base metal vertical axis 18
Distribution is different, can make welding gun heating zone 13 that whole leave in molten bath 10 that the outer surface of welding base metal 1 is thermally formed is welded mother
The most vertex position of material 1, molten bath 10 and the outer surface of welding base metal 1 form certain tension, meanwhile, because molten bath 10 has one
Fixed quality, molten bath 10 is whole, and there is the sliding forces downwardly along welding base metal 1；It can further be seen that welding wire in Fig. 2
Welding wire feeding angle 22, the conveying of welding wire front end are formed between the axis and welding base metal horizontal axis 19 of front end conveying heated filament section 2
The welding wire feeding angle 22 formed between the axis and welding base metal horizontal axis 19 of heated filament section 2 is 5 ° ± 2 °, and welding wire front end is defeated
After sending the end of heated filament section 2 to form molten drop 14, due to the axis and welding base metal horizontal axis 19 of welding wire front end conveying heated filament section 2
Between the welding wire feeding angle 22 that is formed be 5 ° ± 2 °, the molten condition of the molten drop 14 can convey heated filament section 2 with welding wire front end
Adhesion is formed, while the molten drop 14 of molten condition can form atom with molten bath 10 rapidly again and be combined, because of welding wire feeding angle
The presence of degree 22, the state of the presentation downward angle of molten drop 14 form complete atom with molten bath 10 and are combined, this downward angle
Degree can preferably avoid molten drop 14 and close on the lower welding base metal of 10 temperature of molten bath 1 before forming complete atom and combining
Surface area contact, such improper contact can lead to the non-atomic of the surface of the lower welding base metal of molten drop 14 and temperature 1
In conjunction with quality problems.
Welding base metal 1 can be rotated with certain speed along welding base metal central axis 23, and welding gun 11 and welding wire front end are defeated
Send heated filament section 2 that can form screw with welding base metal 1, cladding heap is welded in molten drop 14 and the molten bath of 1 outer surface of welding base metal
The 10 atom bound fractions formed can form in 1 outer surface of welding base metal and arrange close Spiral distribution, can be according to difference
The welding base metal 1 of diameter adjusts the various rotary speeies and welding gun 11 and welding wire front end conveying heated filament section 2 of welding base metal 1
The speed of transverse shifting, come formed various density and thickness solder deposition overlay cladding 9 Spiral distribution.
In the embodiment, welding base metal 1 is alloy carbon steel material, and solder deposition overlay cladding 9 is chromium nickel stainless steel material.
In the parameter setting of the device, the end of welding wire front end conveying heated filament section 2 is located inside welding gun heating zone 13
When, the end that welding wire front end can be conveyed to heated filament section 2 is 2mm-5mm, such distance at a distance from 1 outer surface of welding base metal
The formation of the molten drop 14 of welding wire front end conveying heated filament section 2, the especially end of welding wire front end conveying heated filament section 2 and weldering can be met
When the distance for connecing 1 outer surface of base material is 3mm ± 0.5mm, through overtesting, the effect that molten drop 14 is formed is best.
But found by many experiments, when welding wire 5 is sent directly into the heating electric arc of welding gun heating zone 13, heating weldering
For the welding wire heating power supply 6 of silk 5 due to being AC power, the heating electric arc of meeting Butt welding gun heating zone 13 generates electromagnetic interference, molten drop
14 can form splashing with molten bath 10, and welding procedure is unstable.
In order to advanced optimize the problem, the end of welding wire front end conveying heated filament section 2 is located at welding gun heating zone 13 and is radiated
It, can will be before welding wire in order to facilitate the debugging of technical parameter to the outermost endpoint location of 1 outer surface profile line of welding base metal
The end of end conveying heated filament section 2 is located at using 17 direction of welding gun central axes as the imaginary circles cylinder of diameter 10mm ± 2mm of cylindrical wire
The interior zone of 1 outer surface profile line of welding base metal is projected to, 1 front end of welding gun is 10mm ± 3mm at a distance from welding base metal 1,
When practical application, the debugging acid of a diameter 10mm ± 2mm can be made, facilitates the parameter testing at scene；Such design, when
Welding wire 5 is with 1 contact point of welding base metal at the edge in molten bath 10, and welding wire 5 is first fused into the molten drop 14 of drops, then drops
Molten drop 14 successfully flow into molten bath 10, the heating electric arc of welding gun heating zone 13, molten bath 10, the fusing of welding wire 5 are all very stable, weldering
Expect that deposition overlay cladding 9 is molded also more regular beauty；When welding wire 5 leaves 10 edge a distance of molten bath, the fusing of welding wire 5 is not
The molten drop 14 with very high tension can be formed, the state that will present brook shape flows into molten bath 10, the original of molten drop 14 and molten bath 10 again
Sub- cohesive process is not smooth enough, therefore, is at the edge in molten bath 10 by welding wire 5 and the contact point of welding base metal 1 in the embodiment
It is most suitable, it can ensure that the atom bound fraction that molten drop 14 is formed with molten bath 10 can form row in 1 outer surface of welding base metal
Close Spiral distribution is arranged, for the embodiment since welding base metal is alloy carbon steel material, solder deposition overlay cladding is that chromium nickel is stainless
Steel material, dilution rate is low when welding, significantly ensure that the low dilution rate of base material, is also to ensure that the pure of welding wire 5
Degree, enhances the corrosion resistance of solder deposition overlay cladding 9, meanwhile, the compactness that molten drop 14 is combined with the atom that molten bath 10 is formed,
The outer surface that also improves oil cylinder of hydraulic support jack piston rod is wear-resisting, corrosion-resistant, shock resistance, and extending piston rod makes
Use the service life.
Meanwhile the embodiment uses and heats welding wire front end conveying heated filament section 2 before welding wire 5 is filled into molten bath 10
To 100-300 DEG C of temperature, which reduces the energy that the traditional handicraft of arc-melting welding wire 5 is consumed, and improve efficiency, drop
Low dilution rate, while processing cost is low, this method can be used for repairing damaged piston rod, can be used for making new
Piston rod.
The concrete application processing step and technological parameter of apparatus above is described in detail below.
In the embodiment, oil cylinder of hydraulic support jack piston rod 21 to be repaired is the welding in above-mentioned apparatus description
The material of base material 1, the oil cylinder of hydraulic support jack piston rod 21 to be repaired is 40Cr, belongs to medium carbon low alloy steel, welding wire 5
Using 316L stainless steels, belong to austenitic stainless steel, according to following technique, 316L stainless steel welding stick cladding heaps are soldered to be repaired
The outer surface of oil cylinder of hydraulic support jack piston rod 21 forms solder deposition overlay cladding 9, by oil cylinder of hydraulic support to be repaired
Jack piston rod 21, which is repaired, to be completed.
Oil cylinder of hydraulic support jack piston rod cladding build-up welding apparatus in the embodiment, when concrete application include following
Processing step：
(1) preparatory process includes the following steps：
The chrome layer on 21 surface of oil cylinder of hydraulic support jack piston rod to be repaired is removed；
21 entirety of oil cylinder of hydraulic support jack piston rod to be repaired is preheating to 200 DEG C ± 10 DEG C；
Oil cylinder of hydraulic support jack piston rod 21 to be repaired is fixed on rotatable device, makes piston rod 21 can
To be rotated around the rotation centerline of rotatable device；
(2) welding gun 11 adjusts process with welding wire 5 and includes the following steps：
The end of adjustment welding wire front end conveying heated filament section is located inside welding gun heating zone, and welding wire front end conveys the end of heated filament section
End is 2mm-5mm at a distance from welding gun central axes and welding base metal intersection point；
The welding wire length for adjusting welding wire front end conveying heated filament section 2 is 10mm-20mm；
Adjustment welding gun central axes 17 overlapped with oil cylinder of hydraulic support jack piston rod vertical axis 18 to be repaired or
It adjusts and forms inclination angle arrangement, welding gun central axes 17 and liquid to be repaired between welding gun central axes 17 and welding base metal vertical axis 18
The welding gun inclination angle 12 formed between pressure holder cylinder jack piston rod vertical axis 18 is 5 ° ± 2 °.
Adjust the axis of welding wire front end conveying heated filament section 2 and oil cylinder of hydraulic support jack piston rod trunnion axis to be repaired
Line 19 is parallel or adjustment welding wire front end conveys the axis of heated filament section 2 and oil cylinder of hydraulic support jack piston rod water to be repaired
Welding wire feeding angle 22 is formed between flat axis 19, welding wire front end conveys the axis of heated filament section 2 and hydraulic support oil to be repaired
The welding wire feeding angle 22 formed between cylinder jack piston rod horizontal axis 19 is 5 ° ± 2 °.
Welding wire heating power supply 6 is connected, the welding wire of welding wire front end conveying heated filament section 2 is heated, keeps welding wire front end conveying heat
Silk section 2 is heated to 100-300 DEG C of temperature before entering molten bath 10；
Start to convey argon gas；
Start welding gun water-cooling system and Water-cooling circulating is provided；
(3) cladding built-up welding welding sequence includes the following steps：
High frequency ignites welding gun electric arc, which can lag 1-2S than previous process, or adjusts as needed arbitrary stagnant
Time afterwards；
Start rotatable device rotation, drives oil cylinder of hydraulic support jack piston rod 21 to be repaired to rotate, when to be repaired
Oil cylinder of hydraulic support jack piston rod 21 when being rotated on rotatable device, welding gun 11 can be along piston rod 21 to be repaired
Outer surface vertically moves, and the plumb joint of welding gun 11 forms screw with piston rod 21 to be repaired, and welding wire 5 is complete with spiral trajectory
The cladding built-up welding welding of pairs of 21 outer surface of oil cylinder of hydraulic support jack piston rod to be repaired；
In cladding built-up welding welding sequence, the technological parameter of deposition built-up welding is default as follows：
A. argon gas valve regulated throughput is opened；
B. welding current：200-230A；
C. weldingvoltage：Direct current 14-17V；
D. the throughput of argon gas：6L/min ± 10%；
E. the welding wire electric current of welding wire front end conveying heated filament section：50-100A；
F. the wire feed rate of welding wire：1.8m/min ± 10%.
21 outer surface cladding built-up welding welding layer thickness of oil cylinder of hydraulic support jack piston rod to be repaired is 0.5-2.0mm,
The thickness of cladding built-up welding welding layer can also be set as to the thickness of any needs, only need to adjust welding wire 5 and hydraulic pressure branch to be repaired
The screw speed of frame cylinder jack piston rod 21 can easily realize different throat thickness；
(4) cladding built-up welding welding completion process includes the following steps：
When welding gun 11 reaches oil cylinder of hydraulic support 21 tail end of jack piston rod to be repaired, welding wire 5 all will be to be repaired
The 21 outer surface cladding built-up welding of oil cylinder of hydraulic support jack piston rod after the completion of, welding gun 11 and welding wire 5 stop conveying, welding gun 11
Electric current starts decaying until extinguishing；
After lagging 8-10S, the argon gas of welding gun 11 stops gas supply, can also control lag any time；
Welding gun water-cooling system stops Water-cooling circulating；
Rotatable device stops；
Cladding built-up welding welding is completed.
In process above step, for convenience of operating, following method is taken to be adjusted, adjustment welding wire front end conveys heated filament section
2 end is located at using 17 direction of welding gun central axes as the external table of virtual cylinder of a diameter of φ 10mm ± 2mm of cylindrical center's line
Face is along 17 direction projection of welding gun central axes to 21 outer surface profile line of oil cylinder of hydraulic support jack piston rod to be repaired
Interior zone, 11 front end of welding gun is 10mm ± 3mm at a distance from oil cylinder of hydraulic support jack piston rod 21 to be repaired, practical
When operation, the debugging acid of a diameter 10mm ± 2mm is processed, facilitates the parameter testing at scene.
The end that welding wire front end conveying heated filament section 2 can also be adjusted is located at welding gun heating zone 13 and is radiated hydraulic pressure to be repaired
The outermost endpoint location 25 of 21 outer surface profile line of holder cylinder jack piston rod, such technological design, as it was noted above,
When welding wire 5 and 1 contact point of welding base metal are at the edge in molten bath 10, welding wire 5 is first fused into the molten drop 14 of drops, then water droplet
The molten drop 14 of shape successfully flows into molten bath 10, and the heating electric arc of welding gun heating zone 13, molten bath 10, the fusing of welding wire 5 are all very stable,
Solder deposition overlay cladding 9 is molded also more regular beauty.
The technique in operation, can also adjust welding gun heating zone 13 and be radiated oil cylinder of hydraulic support jack to be repaired
The region of 21 outer surface of piston rod and welding wire front end conveying heated filament section 2 are arrived along the axis projections of welding wire front end conveying heated filament section 2
The region of 21 outer surface of oil cylinder of hydraulic support jack piston rod to be repaired is simultaneously positioned at 30 ° ± 10 ° fan-shaped welding regions 20
It is interior, it can ensure that the front end of welding wire front end conveying heated filament section 2 always situated in adjustment welding gun heating zone 13, has been heated in this way
Welding wire front end conveying heated filament section 2 can smoothly be melted into the molten drop 14 of drops, can be formed with molten bath 10 steadily former
Son combines, and 9 compact structure of solder deposition overlay cladding, the dilution rate of the oil cylinder of hydraulic support jack piston rod 21 of reparation is low, weldering
Expect that the purity of deposition overlay cladding 9 is high, 21 corrosion resistance of oil cylinder of hydraulic support jack piston rod is strong.
In above-mentioned technique, realize that the two dissimilar material realizes that deposition built-up welding welding, welding base metal oil cylinder of hydraulic support are very heavy
The chemical composition of top piston rod 21 and welding wire 5 is very different with performance, and the connecting welding of base material identical as two kinds requires completely
The connecting welding of difference, two kinds of different base materials need to only weld together, and not may require that dilution rate is low, and the embodiment is different by the two
Kind material realizes that deposition built-up welding welds together, and does not require nothing more than the deposition built-up welding intensity of welding wire 5 and 21 surface of piston rod, also requires
Welding wire 5 is not diluted too much by base material oil cylinder of hydraulic support jack piston rod 21 as possible, exactly requires welding base metal hydraulic pressure branch
The ingredient of few fusing of 21 outer surface of frame cylinder jack piston rod, 9 material of solder deposition overlay cladding of surface deposited metal built-up welding can
It is diluted or waters down with smaller, dilution rate only has 10% or so it has been confirmed by experiments that, close to the level of plasma arc surfacing, base
Originally the most of ingredient and performance of austenitic stainless steel are remained, the corrosion protection performances of 316L give full play of, surface deposited metal
9 stainless property of solder deposition overlay cladding of built-up welding enhances,
In the embodiment, 21 a diameter of Φ 120mm of oil cylinder of hydraulic support jack piston rod to be repaired, length is
900mm, according to the screw of the rotation and welding gun 11 of following velocity interpolation piston rod 21, rotatable device rotation makes to be repaired
21 outer surface of oil cylinder of hydraulic support jack piston rod linear velocity be 300-400mm/min, hydraulic support to be repaired oil
21 per revolution of cylinder jack piston rod, welding gun 11 are 4-6mm along 21 outer surface of piston rod to be repaired longitudinal movement distance,
The spiral solder deposition overlay cladding 9 of complete densification is formed in 21 outer surface of piston rod to be repaired.
After the completion of the cladding built-up welding welding of 21 outer surface of oil cylinder of hydraulic support jack piston rod to be repaired, by outer surface
The soldered piston rod of cladding built-up welding 21 is removed, and cladding built-up welding soldered piston rod 21 in outer surface is erect and is placed,
It realizes natural cooling, erects and place natural cooling, 21 appearance of piston rod after the piston rod 21 after reparation can be made and repaired
Solder deposition 9 internal stress distributions of overlay cladding of face cladding built-up welding are uniformly indeformable, and metallization structure is fine and close, and mechanical property is excellent
It is good.
After the soldered piston rod of outer surface cladding built-up welding 21 is cooled to room temperature, 21 surface of piston rod is added
Work, and reserved 0.3mm-0.5mm surpluses, then grinding is carried out to the size needed to 21 outer surface of piston rod, so that it may with reality
Piston rod 21 after now repairing is installed and used.
In the embodiment, the cladding built-up welding throat thickness of 21 outer surface of oil cylinder of hydraulic support jack piston rod after reparation
For 2.0mm-2.5mm, cladding built-up welding throat thickness can also be adjusted as needed, wanted with adapting to a variety of different specifications
It asks.
The welding base metal oil cylinder of hydraulic support jack piston rod 21 of the embodiment is alloy carbon steel material, solder deposition heap
Layer 9 is austenitic stainless steel or chromium nickel stainless steel material, and 5 material of welding wire is austenitic stainless steel, specially Stainless steel 316 L
Material, it is HS316Lsi 316Lsi chromium nickel that 5 material of welding wire, which can also select chromium nickel stainless steel material, 5 material of specific welding wire,
Stainless steel, welding wire 5 a diameter of Φ 1.2mm ± 0.2mm, a diameter of Φ 3.2mm ± 0.2mm of tungsten electrode.
Such as the oil cylinder of hydraulic support jack piston rod that above-mentioned apparatus and technique make, including welding base metal 1 and according to upper
It states device and process cladding heap is soldered to the solder deposition overlay cladding 9 of welding base metal outer surface, the equipment and process letter
It is single, but inside the solder deposition overlay cladding 9 of the cladding built-up welding for 21 outer surface of oil cylinder of hydraulic support jack piston rod repaired
Stress distribution is uniform, corrosion resistance and good, strong shock resistance.Both it can be used for repairing the oil cylinder of hydraulic support thousand of tradition damage
Jin top piston rod 21, can also make new oil cylinder of hydraulic support jack piston rod 21, make new oil cylinder of hydraulic support thousand
When the piston rod 21 of jin top, save the process of exterior surface coating.
The manufacture craft is to remove the unilateral removal 0.5mm of 21 diameter of oil cylinder of hydraulic support jack piston rod to be repaired
Except original chrome layer, the solder deposition of the chromium nickel stainless steel material of the unilateral deposition built-up welding 2.0-2.5mm of process above is then used
Overlay cladding 9 recycles ripe process for machining to be worked into the size of needs, generally that oil cylinder of hydraulic support to be repaired is very heavy
The outer surface for pushing up piston rod 21 retains the new oil cylinder of hydraulic support thousand of the overlay cladding 9 of 1mm or so, the technique reparation or making
Jin pushes up 9 pore-free of surfacing of piston rod layer and is mingled with equal weld defects, the solder deposition overlay cladding 9 of the weld seam formation of deposition built-up welding
Quality is high.
In multiple oil cylinder of hydraulic support jack piston rods 21 of the embodiment reparation, a cladding built-up welding is randomly choosed
Piston rod 21 after reparation measures after being cut from 21 cross section of piston rod with wire cutting, and 21 outer surface of piston rod uniformly coats one
The chromium nickel stainless steel metal of layer thickness about 1mm, it is strong bonded together with welding base metal piston rod 21；It is smeared with acids corrosive liquid
Section, internal carbon steel metal occur fierce chemical reaction and with corrosions, outside the solder deposition overlay cladding 9 of chromium nickel stainless steel
Surface layer is reactionless, and still bright as before, it is very strong that this experiment shows that 9 outer layer of solder deposition overlay cladding of chromium nickel stainless steel has
Corrosion resistance.
With hand-held hardometer to cladding built-up welding and it is machined after the appearance surface hardness of piston rod 21 be tested,
Hardness number is HB350-380, and such hardness not only facilitates machining but also can effectively resist external force damage.It lives with electrodeposited chromium reparation
The technique of stopper rod 21 is compared, and the solder deposition overlay cladding 9 of the chromium nickel stainless steel of thickness is determined in 21 outer surface deposition built-up welding of piston rod,
The ability of anticorrosive, anti-external mechanical force damage can all greatly promote.Deposition built-up welding solder deposition overlay cladding 9 and base material piston rod
21 be metallurgical binding, be will not fall off by outer force effect, and corrosion can be effectively prevent.
Overlay case hardness HB350-380, resists the performance of external force damage also superior to chrome layer, straight after machining
Use is connect, chrome-plated process is eliminated, has fundamentally prevented environmental pollution, meets green remanufacturing theory, meanwhile, which can
Remanufactured with repeated multiple times implementation deposition built-up welding, can locally, entirety, thin layer, thick-layer carry out various reparations, tested by small lot
Card, 98% or more product first-time qualification rate, rehabilitation expense only has the 30% of original cost, and successfully solving gas shielded welding line has
The deficiency of defect.
Fig. 6 is the structural schematic diagram of the oil cylinder of hydraulic support jack piston rod after repairing, it is clear that repairing in figure
Oil cylinder of hydraulic support jack piston rod after multiple, including welding base metal 8 and according to oil cylinder of hydraulic support jack described above
Piston rod cladding build-up welding apparatus cladding heap is soldered to the solder deposition overlay cladding 9 of welding base metal outer surface.
In conclusion heated filament argon arc welding technique is efficient, high quality, technology stability is good, and small investment is practical and convenient, comprehensive
It is cost-effective, there is promotional value.
The embodiment mainly introduces the technique for repairing oil cylinder of hydraulic support jack piston rod 21, when needs are according to the technique
When making new oil cylinder of hydraulic support jack piston rod 21, it is only necessary to save and oil cylinder of hydraulic support jack to be repaired is lived
The processing step of the chrome layer removal on stopper rod surface, remaining step are identical.
Only as described above, only specific embodiments of the present invention, when the model that cannot be limited the present invention with this and implement
It encloses, therefore the displacement of its equivalent assemblies, or according to equivalent variations made by scope of patent protection of the present invention and modification, all should still belong to this hair
The scope that bright claims are covered.
Claims (10)
1. a kind of cylinder jack piston rod cladding overlaying method, it is characterized in that：It comprises the following steps that：
(1) preparatory process includes the following steps：
The chrome layer on oil cylinder of hydraulic support jack piston rod surface to be repaired is removed；
Oil cylinder of hydraulic support jack piston rod to be repaired is preheating to 200 DEG C ± 10 DEG C；
Oil cylinder of hydraulic support jack piston rod to be repaired is fixed on rotatable device, allows piston rod around can revolve
The rotation centerline of rotary device rotates；
(2) welding gun adjusts process with welding wire and includes the following steps：
The end of adjustment welding wire front end conveying heated filament section is located inside welding gun heating zone, welding wire front end convey heated filament section end and
The distance of welding gun central axes and welding base metal intersection point is 2mm-5mm；
The welding wire length for adjusting welding wire front end conveying heated filament section is 10mm-20mm；
Adjustment welding gun central axes overlap or adjust welding gun with oil cylinder of hydraulic support jack piston rod vertical axis to be repaired
Inclination angle arrangement is formed between central axes and welding base metal vertical axis, welding gun central axes and oil cylinder of hydraulic support to be repaired are very heavy
The welding gun inclination angle formed between the piston rod vertical axis of top is 5 ° ± 2 °；
Axis and the oil cylinder of hydraulic support jack piston rod horizontal axis to be repaired for adjusting welding wire front end conveying heated filament section are flat
The axis and oil cylinder of hydraulic support jack piston rod horizontal axis to be repaired of row or adjustment welding wire front end conveying heated filament section
Between form welding wire feeding angle, welding wire front end conveys the axis of heated filament section and oil cylinder of hydraulic support jack piston to be repaired
The welding wire feeding angle formed between bar horizontal axis is 5 ° ± 2 °；
Welding wire heating power supply is connected, the welding wire that heated filament section is conveyed to welding wire front end heats, and welding wire front end conveying heated filament section is kept to exist
100-300 DEG C of temperature is heated to before into molten bath；
Start to convey argon gas；
Start welding gun water-cooling system and Water-cooling circulating is provided；
(3) cladding built-up welding welding sequence includes the following steps：
High frequency ignites welding gun electric arc；
Start rotatable device rotation, drives oil cylinder of hydraulic support jack piston rod to be repaired to rotate, when hydraulic pressure to be repaired
When being rotated on rotatable device, welding gun can longitudinally move holder cylinder jack piston rod along piston rod outer surface to be repaired
Dynamic, the plumb joint of welding gun forms screw with piston rod to be repaired, and welding wire is completed with spiral trajectory to hydraulic pressure to be repaired
The cladding built-up welding of holder cylinder jack piston rod outer surface is welded；
(4) cladding built-up welding welding completion process includes the following steps：
When welding gun reaches oil cylinder of hydraulic support jack piston rod tail end to be repaired, welding wire is all by hydraulic support to be repaired
After the completion of cylinder jack piston rod outer surface cladding built-up welding, welding gun and welding wire stop conveying, welding gun electric current start decaying until
Extinguish；
Welding gun argon gas stops gas supply；
Welding gun water-cooling system stops Water-cooling circulating；
Rotatable device stops；
Cladding built-up welding welding is completed.
2. a kind of cylinder jack piston rod cladding overlaying method according to claim 1, it is characterized in that：The step
(2) welding gun is adjusted with welding wire in process, when adjustment welding wire front end conveys the position of heated filament section, can also take following methods：It adjusts
The end of whole welding wire front end conveying heated filament section is located at using welding gun central axes direction as a diameter of φ 10mm ± 2mm of cylindrical center's line
Virtual cylinder external surface along welding gun central axes direction projection to oil cylinder of hydraulic support jack piston rod to be repaired outside
The interior zone of surface profile line, welding gun front end at a distance from oil cylinder of hydraulic support jack piston rod to be repaired for 10mm ±
3mm。
3. a kind of cylinder jack piston rod cladding overlaying method according to claim 1, it is characterized in that：The step
(2) welding gun is adjusted with welding wire in process, when adjustment welding wire front end conveys the position of heated filament section, can also take following methods：It adjusts
The end of whole welding wire front end conveying heated filament section is located at welding gun heating zone and is radiated oil cylinder of hydraulic support jack piston to be repaired
The outermost endpoint location of rod outer surface contour line.
4. a kind of cylinder jack piston rod cladding overlaying method according to claim 1, it is characterized in that：The step
(2) welding gun is adjusted with welding wire in process, when adjustment welding wire front end conveys the position of heated filament section, can also take following methods：It adjusts
Whole welding gun heating zone is radiated region and the conveying of welding wire front end of oil cylinder of hydraulic support jack piston rod outer surface to be repaired
Heated filament section conveys the axis projections of heated filament section to oil cylinder of hydraulic support jack piston rod appearance to be repaired along welding wire front end
The region in face is simultaneously in 30 ° ± 10 ° fan-shaped welding regions.
5. a kind of cylinder jack piston rod cladding overlaying method according to claim 1, it is characterized in that：It is described rotatable
Device rotation makes the linear velocity of oil cylinder of hydraulic support jack piston rod outer surface to be repaired be 300-400mm/min；It is to be repaired
Multiple oil cylinder of hydraulic support jack piston rod per revolution, the welding gun are vertically moved along piston rod outer surface to be repaired
Distance is 4-6mm.
6. a kind of cylinder jack piston rod cladding overlaying method according to claim 1, it is characterized in that：The step
(3) in cladding built-up welding welding sequence, the technological parameter of the deposition built-up welding is default as follows：
A. argon gas valve regulated throughput is opened；
B. welding current：200-230A；
C. weldingvoltage：Direct current 14-17V；
D. the throughput of argon gas：6L/min ± 10%；
E. the welding wire electric current of welding wire front end conveying heated filament section：50-100A；
F. the wire feed rate of welding wire：1.8m/min ± 10%.
7. according to a kind of any cylinder jack piston rod cladding overlaying methods of claim 1-6, it is characterized in that：It is described
After the completion of the cladding built-up welding welding of oil cylinder of hydraulic support jack piston rod outer surface to be repaired, outer surface cladding built-up welding is welded
The piston rod for connecing completion is removed, and cladding built-up welding soldered piston rod in outer surface is erect and is placed, and realizes natural cooling.
8. according to a kind of any cylinder jack piston rod cladding overlaying methods of claim 1-6, it is characterized in that：It will be outer
After the soldered piston rod of surface cladding built-up welding is cooled to room temperature, piston rod surface is processed, and reserved 0.3mm-
0.5mm surpluses, then grinding is carried out to the size needed to the piston rod outer surface.
9. according to a kind of any cylinder jack piston rod cladding overlaying methods of claim 1-6, it is characterized in that：It is described
The cladding built-up welding throat thickness of the outer surface of the oil cylinder of hydraulic support jack piston rod of reparation is 2.0mm-2.5mm.
10. according to a kind of any cylinder jack piston rod cladding overlaying methods of claim 1-6, it is characterized in that：Institute
It is austenitic stainless steel to state solder wire material.
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| CN111318785A (en) * | 2018-12-17 | 2020-06-23 | 天津市英源焊接技术有限公司 | Process for overlaying aluminum bronze on inner surface of coal mine liquid support 27SiMn oil cylinder |
| CN111659981A (en) * | 2020-04-12 | 2020-09-15 | 山东塔高矿业机械装备制造有限公司 | Device and method for manufacturing cylinder cladding layer for mining hydraulic prop and application of device and method |
| CN114074243A (en) * | 2020-08-14 | 2022-02-22 | 山西庞泉重型机械制造有限公司 | Method for repairing surface of two cylinders of piston rod based on girth welding cladding process |
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