CN108161194A - A kind of plasma surfacing restorative procedure of drawing block - Google Patents
A kind of plasma surfacing restorative procedure of drawing block Download PDFInfo
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- CN108161194A CN108161194A CN201711417243.5A CN201711417243A CN108161194A CN 108161194 A CN108161194 A CN 108161194A CN 201711417243 A CN201711417243 A CN 201711417243A CN 108161194 A CN108161194 A CN 108161194A
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- welding
- reel
- surfacing
- drawing block
- plasma
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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
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
- B23K10/027—Welding for purposes other than joining, e.g. build-up welding
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The present invention relates to a kind of plasma surfacing restorative procedure of drawing block, mainly solve yielding drum substrate existing for existing reel renovation technique, matrix and alloy bond strength is high, case hardness not enough, severe operational environment the problems such as.This method first locally pre-processes reel damage surface, then carries out plasma surfacing on a surface, finally facing surface is processed.Compared with existing recovery technique, present invention process has many advantages, such as that thermal weld stress amount is small, matrix thermal deformation is small, weld overlay materials dilution rate is low, case hardness is high, overlay cladding and substrate combinating strength are high, service life length, working environment simple for process are good after reparation, and can local route repair only be carried out to abrading section and be rewelded without former surfacing (spraying) layer whole removal, thus saved raw material shortens repairing efficiency simultaneously, improves work efficiency.In addition, the technique can also be used for the production of new drawing block.
Description
Technical field
The present invention relates to mechanical equipment technical fields, and in particular to a kind of plasma surfacing reparation side of drawing block
Method.
Background technology
Wire drawing machine (also known as drawing machine) belongs to metal product equipment Industry, is widely used in cable, welding wire, steel wire, rope making
The production of the wireworks such as silk, compressor wire, standard component.And drawing block is the important equipment of wire drawing machine, direct shadow
It rings to steel wire surface finish and aligning degree.Drawing cone position is easy to wear in use for some time for drawing block, causes to roll up
Cylinder strength reduction, surface irregularity cause silk material surface mechanical damage, influence normally production and product quality, need to repair
Or reel is replaced, and good renovation technique should make that reel deformation quantity is low, case hardness is high, wearability is good, repair layer and reel cylinder
Bond strength height etc..
Drawing block is repaired at present generally using the method for flame spray welding, supersonic spray coating powder metallurgy.Flame spray welding
There are the problem of mainly have：(1) heating temperature is high, heat input is big and heating temperature and heating speed are not easy to grasp, and workpiece is heated
It is uneven to easily lead to drum substrate gross distortion, the reel quality after repairing is influenced, reel is even resulted in and scraps；(2) it dusted
Journey is difficult to control by operating personnel's hand-guided, everywhere coating thickness, and quality cannot be guaranteed；(3) original must be sprayed by repairing every time
All removal carries out surfacing to weldering (spraying) layer again, wastes raw material；(4) surfacing scene temperature is high, and noise is big, and working environment is poor.
The main problem of supersonic spray coating powder metallurgy method is：(1) primary spraying gained coating layer thickness is small, must repeatedly be sprayed,
Thus low production efficiency；(2) coating is not fine and close enough, and case hardness is inadequate；(3) matrix and alloy bond strength are inadequate, after reparation
Service life is not grown；(4) on-site noise is big during supersonic spray coating, and working environment is poor.
To sum up, there are more shortcoming and defect for existing drawing block restorative procedure, develop a kind of new renovation technique
Seem very necessary and urgent.
Invention content
It is an object of the invention to overcome above-mentioned various deficiencies existing for existing drawing block restorative procedure, one kind is provided
Improved plasma surfacing restorative procedure, this method can effectively reduce heat input to reduce matrix deformation, reduce weld overlay materials
Dilution rate improves its case hardness and overlay cladding and substrate combinating strength, simplifies renovation technique and saves material, improves production
Improved efficiency working environment, the reparation that can be not only used for drawing block can also be used for the production of new drawing block.For in realization
Purpose is stated, the technical solution adopted in the present invention is as follows：
A kind of plasma surfacing restorative procedure of drawing block, includes the following steps：(a) to drawing block pars affecta
Position is handled, and removes former spray-welding coating or former sprayed coating, and then oil removing cleans；(b) it is preheated on positioner using flame
Rifle preheats reel damage location, and built-up welding is carried out to damage location using horizontal welding mode while reel rotates；(c)
After the completion of built-up welding, surfacing part is processed after reel Slow cooling, it is made to meet size and required precision.
Further, concrete operations are in step (a)：The whole circle vehicle of original coating in place's to be repaired is removed first, then by the portion
Vehicle is finally removed position and periphery polishing, is polished to any surface finish, oil removing removal of impurities is spare by position matrix vehicle except certain thickness.
Further, concrete operations are in step (b)：Reel is mounted on positioner first, by plasma spray
Welding gun is fixed on right over reel, and flame preheating lance stretches into inside reel and position to be welded is preheated, and preheating temperature is 400 DEG C
(summer) or 600 DEG C (winters).
Further, bead-welding technology parameter is in step (b)：Plasma spray welding gun is away from matrix surface height 10-15mm, heap
Ion-gas flow 0.5-1.5L/min during weldering, protection air-flow amount 10-20L/min, powder feeding throughput 3-5L/min, welding current
140-200A, weldingvoltage 30-35V.
Further, plasma spray welding gun only makees horizontal transverse movement during built-up welding, and positioner rotates one week plasma
Spray welding gun moves 5-7mm toward direction to be welded, and corresponding mandrel surface linear velocity is 150-200mm/min, and welding process is kept
Treat that surfacing part is vertical with welding gun.
Further, it treats that alloy powder heap is welded to certain thickness in step (c), stop built-up welding and keeps reel with original
Rotating speed is rotated further cooling.Environment temperature is cooled down when being higher than 25 DEG C using air, in reel when environment temperature is less than 25 DEG C
Upper package thermal insulation material makes its Slow cooling.
Further, alloy powder used in built-up welding is Ni60 alloy powders.
Compared with prior art, the invention has the advantages that：
(1) the thermal weld stress amount of the drawing block plasma renovation technique is low, matrix heat distortion amount is small (tests through practice
Deflection is demonstrate,proved in Measurement Allowance), weld overlay materials dilution rate is low, case hardness is high (up to HRC58-60), overlay cladding
High (more than 300Mpa) with substrate combinating strength, service life is long after reparation；
(2) it is simple for process, it is welded without multiple-layer stacked, working environment is relatively preferable；
(3) can local route repair only be carried out to abrading section, rewelds without former surfacing (spraying) layer is all removed, both saved
Raw material, and repairing efficiency is shortened, it improves work efficiency, can be widely used in the production and reparation of drawing block.
Description of the drawings
Fig. 1 is reel plasma surfacing renovation technique schematic diagram provided by the invention.
Wherein 1- positioners, 2- plasma spray welding guns, 3- reels to be repaired, 4- flame preheating lances.
Specific embodiment
For those of ordinary skill in the art is made to fully understand technical scheme of the present invention and advantageous effect, below in conjunction with specific
Embodiment is further described.
Embodiment 1
The step of summer repairs reel using plasma surfacing technique provided by the invention is as follows：
The first step：The whole circle vehicle of place's original surfacing (spraying) layer to be repaired is removed first, the position matrix vehicle is then removed into 0.5mm
Vehicle is finally removed position and periphery polishing, is polished to any surface finish by left and right, and oil removing cleans to ensure to treat overlaying surface dry cleansing.
Second step：It will treat that built-up welding reel is mounted on positioner, plasma spray welding gun is placed in via fixture right over mandrel surface,
Flame preheating lance stretches into inside reel and position to be welded is preheated as shown in Figure 1, and preheating temperature is controlled at 400 DEG C or so.It adopts
With horizontal welding mode, adjusting plasma spray welding gun makes its end away from matrix surface height be 10mm or so, welding current 185-
190A, weldingvoltage 30-35V, ion-gas flow 1.5L/min, powder feeding throughput 4L/min, protection air-flow amount 15L/min.Heap
Plasma spray welding gun only makees horizontal transverse movement, reel every revolution plasma spray welding gun translation 7mm, mandrel surface linear speed during weldering
It spends for 200mm/min, welding process is carried out continuously, during which need to remain and treat that surfacing part is vertical with welding gun.Third walks：Work as conjunction
After bronze end (Ni60 alloys, similarly hereinafter) heap is soldered to certain thickness (about 1.5mm), the speed rotation that reel continues to keep original carries out
It is air-cooled, finally built-up welding part is processed, it is made to meet size and required precision.
After testing, the radial contraction amount of postwelding reel is 0.21mm；It is detected by dye penetrant inspection, ultrasonic inspection, overlay cladding
Surface, internal equal flawless；10 points are detected using portable Leeb Hardness Tester TH160, obtaining its final hardness is
61.4HRC。
Embodiment 2
The step of winter repairs reel using plasma surfacing technique provided by the invention is as follows：
The first step：The whole circle vehicle of place's original surfacing (spraying) layer to be repaired is removed first, the position matrix vehicle is then removed into 0.5mm
Vehicle is finally removed position and periphery polishing, is polished to any surface finish by left and right, and oil removing cleans to ensure to treat overlaying surface dry cleansing.
Second step：It will treat that built-up welding reel is mounted on positioner, plasma spray welding gun is placed in via fixture right over mandrel surface,
Flame preheating lance stretches into inside reel and position to be welded is preheated, 600 DEG C of preheating temperature.Using horizontal welding mode, adjustment etc.
Ion spray welding gun makes its end away from matrix surface height 10mm or so, welding current 150-155A, weldingvoltage 30-35V, ion
Throughput 1.5L/min, powder feeding throughput 3.5L/min, protection air-flow amount 15L/min.Plasma spray welding gun only makees water during built-up welding
Flat transverse shifting, reel every revolution plasma spray welding gun translation 5mm, reel are driven via positioner around axis rotation, table
Upper thread speed 160mm/min.Welding process is carried out continuously, and during which need to be remained and be treated that surfacing part is vertical with welding gun.Four or three steps：
After alloy powder heap is soldered to certain thickness (about 1.5mm), make it that original speed be kept to continue to turn with asbestos cloth package reel
Dynamic Slow cooling, is finally processed built-up welding part, it is made to meet size and required precision
After testing, postwelding reel radial contraction amount is 0.29mm；It is detected by dye penetrant inspection, ultrasonic inspection, overlay cladding table
Face, internal equal flawless；10 points are detected by portable Leeb Hardness Tester TH160, obtain its final hardness as 57.6HRC.
Claims (7)
1. the plasma surfacing restorative procedure of a kind of drawing block, which is characterized in that include the following steps：(a) to wire drawing machine
Reel damage location is handled, and removes former spray-welding coating or former sprayed coating, and then oil removing cleans；(b) it is sharp on positioner
Reel damage location is preheated with flame preheating lance, using horizontal welding mode to its damage location while reel rotates
Carry out built-up welding；(c) after the completion of built-up welding, surfacing part is processed after reel Slow cooling, it is made to meet size and precision
It is required that.
2. a kind of plasma surfacing restorative procedure of drawing block according to claim 1, it is characterised in that：Step
(a) place's spray-welding coating to be repaired or the whole circle vehicle of former sprayed coating are removed first in, the position matrix vehicle is then removed into certain thickness, finally
Vehicle is removed into position and periphery polishing, is polished to any surface finish, oil removing removal of impurities is spare.
3. a kind of plasma surfacing restorative procedure of drawing block according to claim 1, it is characterised in that：Step
(b) reel is mounted on positioner first in, plasma spray welding gun is fixed on right over reel, flame preheating lance is stretched
Enter and position to be welded is preheated inside reel, preheating temperature is 400 DEG C or 600 DEG C.
A kind of 4. plasma surfacing restorative procedure of drawing block according to claim 1, which is characterized in that step
(b) bead-welding technology parameter is in：Plasma spray welding gun is away from matrix surface height 10-15mm, ion-gas flow 0.5- during built-up welding
1.5L/min, protection air-flow amount 10-20L/min, powder feeding throughput 3-5L/min, welding current 140-200A, weldingvoltage 30-
35V。
5. a kind of plasma surfacing restorative procedure of drawing block according to claim 1, it is characterised in that：During built-up welding
Plasma spray welding gun only makees horizontal transverse movement, and positioner rotates one week plasma spray welding gun and moves horizontally 5-7mm, accordingly
Mandrel surface linear velocity for 150-200mm/min, welding process holding treats that surfacing part is vertical with welding gun.
6. a kind of plasma surfacing restorative procedure of drawing block according to claim 1, it is characterised in that：Step
(c) it treats that alloy powder heap is welded to certain thickness in, stops built-up welding and reel is kept, which to be rotated further with original rotating speed, makes it abundant
Cooling, environment temperature are cooled down when being higher than 25 DEG C using air, and environment temperature wraps up thermal insulating material when being less than 25 DEG C on reel
Material makes its Slow cooling.
7. according to a kind of plasma surfacing restorative procedure of drawing block of claim 1-6 any one of them, feature exists
In：Alloy powder used in built-up welding is Ni60 alloy powders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711417243.5A CN108161194A (en) | 2017-12-25 | 2017-12-25 | A kind of plasma surfacing restorative procedure of drawing block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711417243.5A CN108161194A (en) | 2017-12-25 | 2017-12-25 | A kind of plasma surfacing restorative procedure of drawing block |
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| CN108161194A true CN108161194A (en) | 2018-06-15 |
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| CN201711417243.5A Pending CN108161194A (en) | 2017-12-25 | 2017-12-25 | A kind of plasma surfacing restorative procedure of drawing block |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110732800A (en) * | 2019-10-25 | 2020-01-31 | 神华神东煤炭集团有限责任公司 | Iron-based alloy composition for repairing middle tank and repairing method of middle tank |
| CN113182779A (en) * | 2021-04-28 | 2021-07-30 | 芜湖磁轮传动技术有限公司 | Production process for manufacturing conductor rotor by powder fusion welding |
| CN113305501A (en) * | 2021-05-27 | 2021-08-27 | 中铝郑州有色金属研究院有限公司 | Repairing method of crust breaking hammer head for aluminum electrolysis |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110732800A (en) * | 2019-10-25 | 2020-01-31 | 神华神东煤炭集团有限责任公司 | Iron-based alloy composition for repairing middle tank and repairing method of middle tank |
| CN110732800B (en) * | 2019-10-25 | 2021-09-03 | 神华神东煤炭集团有限责任公司 | Iron-based alloy composition for repairing middle tank and repairing method of middle tank |
| CN113182779A (en) * | 2021-04-28 | 2021-07-30 | 芜湖磁轮传动技术有限公司 | Production process for manufacturing conductor rotor by powder fusion welding |
| CN113305501A (en) * | 2021-05-27 | 2021-08-27 | 中铝郑州有色金属研究院有限公司 | Repairing method of crust breaking hammer head for aluminum electrolysis |
| CN113305501B (en) * | 2021-05-27 | 2022-08-12 | 中铝郑州有色金属研究院有限公司 | Repairing method of crust breaking hammer head for aluminum electrolysis |
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Application publication date: 20180615 |