CN103273168B - Tungsten carbide suspended bead welding method and device - Google Patents
Tungsten carbide suspended bead welding method and device Download PDFInfo
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- CN103273168B CN103273168B CN201310149544.XA CN201310149544A CN103273168B CN 103273168 B CN103273168 B CN 103273168B CN 201310149544 A CN201310149544 A CN 201310149544A CN 103273168 B CN103273168 B CN 103273168B
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- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 title claims abstract description 210
- 238000003466 welding Methods 0.000 title claims abstract description 203
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000011324 bead Substances 0.000 title abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 67
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 50
- 239000010959 steel Substances 0.000 claims abstract description 50
- 230000000694 effects Effects 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 54
- 238000004804 winding Methods 0.000 claims description 50
- 239000000725 suspension Substances 0.000 claims description 23
- 238000005253 cladding Methods 0.000 claims description 19
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 10
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- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 abstract description 8
- 238000002844 melting Methods 0.000 abstract description 8
- 238000005299 abrasion Methods 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract 1
- 238000003760 magnetic stirring Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 9
- 238000010891 electric arc Methods 0.000 description 5
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- 229910001209 Low-carbon steel Inorganic materials 0.000 description 3
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- 230000001276 controlling effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 241000251133 Sphyrna tiburo Species 0.000 description 2
- NGONBPOYDYSZDR-UHFFFAOYSA-N [Ar].[W] Chemical compound [Ar].[W] NGONBPOYDYSZDR-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
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- 238000005261 decarburization Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
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- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
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- 239000010937 tungsten Substances 0.000 description 1
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- Arc Welding In General (AREA)
Abstract
The invention discloses a tungsten carbide suspended bead welding method and device. When bead welding is conducted, a steel workpiece is clamped on an installation platform and then is preheated; after arcing is conducted on an end tab, the lower tube section of a tungsten carbide supply tube extends to the position above a bead welding area of the steel workpiece along with a water-cooled welding gun; welding sticks are melted at the corresponding position of the bead welding area of the steel workpiece, and a melting pool is formed in the corresponding position; tungsten carbide particles fall into the melting pool from a tube opening of the tungsten carbide supply tube of a tungsten carbide feeding device; under the function of magnetic stirring, molten steel in the melting pool is stirred, and the tungsten carbide particles in the melting pool roll in the molten steel; when the molten steel solidifies, the tungsten carbide particles are solidified in the original melting pool in a suspended state. According to the method, the tungsten carbide particles are directly bead-welded at the portion, with abrasion resistance needing to be increased, of a workpiece, the tungsten carbide particles are evenly dispersed on a bead welding layer from top to bottom instead of subsiding at the bottom of the bead welding layer in the bead welding process, namely, the tungsten carbide particles are suspended in the bead welding layer, and the abrasion resistant effect of the bead welding position after cooling is better.
Description
Technical field
The present invention relates to a kind of tungsten carbide suspension overlaying method, and the device that this suspension overlaying method uses.
Background technology
Tungsten carbide (WC) is a kind of compound be made up of tungsten and carbon, extreme hardness, and mohs hardness is 8.5 ~ 9, and fusing point reaches 2870 DEG C; And the resistance of tungsten carbide is low, is often used as cutter material, some need the equipment part of high rigidity, high abrasion, and it is armoring etc. to be used for manufacturing high rigidity.In addition, tungsten carbide or wear-resisting industry solve the active principle of the severe wearing and tearing in local.Such as, the shovel head of scraper or the grab bucket etc. of loading machine, operationally, need frequently to rub with institute's transported object, if shovel head or grab bucket are manufactured by tungsten carbide completely, then cost is too high, and also there is no need, and only needs the scuff resistance increasing concentrated wear position just can deal with problems in real work.
Built-up welding has recovery weldment size and the large function of surface peening two, uses the method for welding, is melted by resurfacing welding material, be piled into wear-resisting, anti-corrosion, heat-resisting overlay cladding by self gravitation at surface of the work by thermals source such as flame, electric arc, plasma arcs.
When at present tungsten carbide being used for bead-welding technology, first tungsten carbide and other auxiliary material being prepared into tungsten carbide resurfacing welding material, namely making tungsten carbide surfacing electrode and tungsten carbide bead welding wire.Wherein, the preparation method of tungsten carbide surfacing electrode has two kinds, and one adopts common low carbon steel wire to do core, by adding tungsten carbide particle and transition in coating; Another kind in advance tungsten carbide particle is filled in mild steel steel band or steel pipe, then the coating of external coated ordinary construction steel electrode type at mild steel steel band or steel pipe.
The method of carrying out built-up welding for the above-mentioned resurfacing welding material containing tungsten carbide has manual electric arc pile up welding, oxy-acetylene built-up welding and tungsten argon arc built-up welding three kinds.Because tungsten carbide particle in resurfacing welding material adds in resurfacing welding material in advance, instead of again formed in weld deposit process, so the difference of overlaying method, what cause tungsten carbide particle itself is as different with the impact of decarburization in scaling loss, and therefore wearability also has different performances.
For manual electric arc pile up welding method, general bead-welding technology parameter is the same with normal manual arc welding, and such as, the welding rod that diameter is 4.0 millimeters, welding current is generally about 170A.Because arc temperature reaches more than 4000 degrees Celsius, have certain scaling loss effect to tungsten carbide particle itself, little particle is comparatively large due to specific area, is much burnt, and then again forms tungsten carbide crystal grain and its hetero-organization.Large particle scaling loss is relatively light, but surface there will be decarburized layer to a certain degree, causes the declines such as anti-wear performance.Therefore generally do not advise using the method Tungsten Carbide Surfacing.But due to use and easy to operate, at present still some occasion using the method.
For oxy-acetylene overlaying method, because flame can be divided into neutral flame, carburizing flame and oxidizing flame three kinds, in order to avoid scaling loss and the decarburization of tungsten carbide particle, it is the carburizing flame of 2700 ~ 3500 DEG C by maximum temperature as far as possible, carburizing flame can improve the carbon content in overlay cladding, but because the temperature of its most thermal-flame is also relatively low, and affect built-up welding efficiency.
The temperatures as high of tungsten argon arc built-up welding more than 4000 DEG C, the heat input controlling welding wire when built-up welding is very important, is generally, with electric arc, mother metal is heated to mirror status, then heats welding wire a little, immediately by feeding arc region, welding wire end.As far as possible key avoids electric arc to the excess molten of welding wire and scaling loss.
Have a variety of tungsten carbide filler rod or welding wire in the market, when using in conjunction with above-mentioned overlaying method, due to the mechanism problem of the deposition of tungsten carbide filler rod or welding wire, the effect of heap postwelding is unsatisfactory; Therefore wish that a kind of technique can make tungsten carbide particle not burning and be attached in overlay cladding.But the proportion due to tungsten carbide is greater than the proportion of common molten steel; in weld deposit process, tungsten carbide particle can sink to bottom welding pool; form tungsten carbide and the layering of heap wlding, tungsten carbide particle cannot be made to be suspended in overlay cladding, also just cannot form effective wearable overlay.
Summary of the invention
Object of the present invention also namely technical problem to be solved be to provide a kind of tungsten carbide particle that makes and can be uniformly dispersed in tungsten carbide suspension overlaying method in overlay cladding and device thereof.
The technical scheme realizing the present invention first object is a kind of tungsten carbide suspension overlaying method, comprises the following steps:
1. by steel workpiece clamping on mounting platform, and the portion faces needing built-up welding is upward, carries out preheating after clamping completes to steel workpiece.
2. the lower tube section of adjustment tungsten carbide supply pipe and the angle of vertical guide are 30 ° ~ 45 °, and the tungsten carbide of tungsten carbide supply pipe supply mouth of pipe distance steel workpiece needs the portion faces 20mm ~ 35mm of built-up welding.
3. the water cooled welding torch adjusting welder is positioned at the top in the built-up welding region of steel workpiece and the sagittal side in built-up welding region; Welding wire is sent in water cooled welding torch by wire-feed motor, starts the cooling water circulating device of welding gun before using.
4. alternating current is passed through to the first spiral winding of the diamagnetic blow device of the both sides, lower end of water cooled welding torch and the second spiral winding.
5. under the control of control cabinet, the weld below wire-feed motor conveying welding wire to water cooled welding torch; Welding big current successively by the pikestaff of water cooled welding torch, welding wire and run-on tab, the starting the arc on run-on tab.
After the starting the arc, the lower tube section of tungsten carbide supply pipe marches to the built-up welding overlying regions of steel workpiece along with water cooled welding torch, welding wire melts at the corresponding site in the built-up welding region of steel workpiece and makes this corresponding site form molten bath, control the tungsten carbide supply buncher of tungsten carbide feeding device, tungsten carbide particle is made to fall into molten bath from the mouth of pipe of the tungsten carbide supply pipe of tungsten carbide feeding device, under the magnetic agitation effect of the first spiral winding and the second spiral winding, molten steel in molten bath stirs, make tungsten carbide particle in molten bath in steel welter, during to molten steel solidification, tungsten carbide particle is cemented in former molten bath with the form suspended.
Water cooled welding torch also swings while walking from front to back under the control of tilt control, thus after welding gun moves from front to back, the built-up welding overlay cladding of one deck parcel tungsten carbide particle in the sagittal wobble area in the built-up welding region of steel workpiece.
When needs increase overlay cladding thickness, repeat above-mentioned steps.
Above-mentioned steps 4. in the first spiral winding of diamagnetic blow device and the second spiral winding by the alternating current of 1A ~ 5A, the phase place of the electric current that the first spiral winding and the second spiral winding pass through is contrary.
Above-mentioned steps is 5. in weld deposit process, and when the faster rotational speed of the tungsten carbide supply buncher of tungsten carbide feeding device, the tungsten carbide particle entering molten bath increases, and when the spin down of tungsten carbide supply buncher, the tungsten carbide particle entering molten bath reduces.
The speed of travel of described water cooled welding torch is 100 ~ 200mm/min, swing width is 20 ~ 30mm, after welding gun moves from front to back, the overlay cladding of built-up welding one deck parcel tungsten carbide particle in the region that the sagittal 20 ~ 30mm in the built-up welding region of steel workpiece is wide.
The technical scheme realizing the present invention second object is a kind of tungsten carbide suspension build-up welding apparatus, comprises mounting platform, welder, the source of welding current, frame, also comprises tungsten carbide feeding device and diamagnetic blow device, control cabinet and link.
Welder comprises horizontal dolly, lifting device, wire-feed motor, wig-wag support, wig-wag and water cooled welding torch, and water cooled welding torch vertical arranges and is arranged on the welding gun seat of wig-wag, and water cooled welding torch is positioned at above mounting platform, and water cooled welding torch is connected with the source of welding current.
Tungsten carbide feeding device is arranged in frame, comprises tungsten carbide storaging bucket, tungsten carbide supply buncher, ribbon conveyer, feeding funnel and tungsten carbide supply pipe; Tungsten carbide storaging bucket is positioned at above feeding funnel, and ribbon conveyer is positioned at feeding funnel inside; The top cover of feeding funnel is provided with charging aperture, and described charging aperture is connected with the discharging opening of tungsten carbide storaging bucket; Have tungsten carbide particle in tungsten carbide storaging bucket, the discharging opening of tungsten carbide storaging bucket is positioned at above the feeding belt of the ribbon conveyer of feeding funnel; The discharging opening of feeding funnel is connected with the charging port of tungsten carbide supply pipe, and the upper pipeline section that described tungsten carbide supply pipe is arranged by vertical and the lower tube section be obliquely installed form, and the angle of lower tube section and vertical guide is 30 ° ~ 45 °; The lower end mouth of pipe of lower tube section is the tungsten carbide supply mouth of pipe of tungsten carbide supply pipe, and the described tungsten carbide supply mouth of pipe is positioned at the top of mounting platform.
Link is fixed on the lower end of the barral of a gun of water cooled welding torch, described link is offered two through holes, and the barral of a gun of water cooled welding torch is fixedly connected with one of them through hole of link, and the lower tube section of tungsten carbide supply pipe is fixedly connected with another through hole of link.
Described diamagnetic blow device is made up of two groups of spiral windings, be respectively the first spiral winding and the second spiral winding, first spiral winding is connected with AC power respectively with the second spiral winding, first spiral winding and the second spiral winding are fixed on the both sides, lower end of water cooled welding torch, and above the pedestal being positioned at mounting platform.
Have tungsten carbide particle in described tungsten carbide storaging bucket, the particle diameter of described tungsten carbide particle is 1.1 ~ 1.7mm.
The lower tube section of described tungsten carbide supply pipe adopts flexible pipe, and its telescopicing performance makes lower tube section can move on workpiece along with welding gun.
Control circuit and corresponding controller are installed in described control cabinet; Described each controller includes power input, power output end and control end; Described controller has traveling controller, tilt control, tungsten carbide to supply the AC power controller of speed-regulating motor controller, wire feed controller, source of welding current controller, diamagnetic blow device; Control circuit is provided with walk signal output, swinging signal output, tungsten carbide supply buncher signal output part, wire feed signal output part, source of welding current signal output part, ac supply signal output;
The walk signal output of control circuit is electrically connected with the control end of traveling controller, the swinging signal output of control circuit is electrically connected with the control end of tilt control, the tungsten carbide supply buncher signal output part of control circuit is electrically connected with the control end that tungsten carbide supplies speed-regulating motor controller, the wire feed signal output part of control circuit is electrically connected with the control end of wire feed controller, the source of welding current signal output part of control circuit is electrically connected with the control end of source of welding current controller, the ac supply signal output of control circuit is electrically connected with the control end of AC power controller.
The present invention has positive effect:
(1) tungsten carbide suspension overlaying method of the present invention does not need tungsten carbide particle and auxiliary material to be made in advance built-up welding again after tungsten carbide filler rod or welding wire, but directly tungsten carbide particle heap is welded in workpiece and needs to increase on the position of wearability, and tungsten carbide particle is not deposited in bottom overlay cladding in weld deposit process, but be dispersed in from top to bottom in overlay cladding, namely be suspended in overlay cladding, after cooling, the abrasion resistant effect of surfacing part is stronger.
(2) tungsten carbide suspension overlaying method of the present invention according to actual needs, can form high life wearing course by multiple-bead deposit, also can suitably reduce wearing layer thickness based on cost consideration.
(3) because tungsten carbide particle exists with absolute version, therefore overlaying method of the present invention only needs to provide energy by the corresponding wire melting not containing tungsten carbide, wire melting is formed behind molten bath, then throws in tungsten carbide particle and enter molten bath, and whole weld deposit process does not have scaling loss to affect on tungsten carbide particle.
(4) rotating speed of the motor of the tungsten carbide feeding device of tungsten carbide suspension build-up welding apparatus of the present invention is adjustable, therefore can realize the control of tungsten carbide particle feeding amount.
(5) tungsten carbide suspension build-up welding apparatus of the present invention is preferably provided with diamagnetic blow device at the lower end periphery of water cooled welding torch, this device can ensure the welding arc realizing steady and continuous, in weld deposit process, give the magnetic agitation that molten bath molten steel is certain simultaneously, make tungsten carbide particle be evenly distributed further.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of tungsten carbide suspension build-up welding apparatus of the present invention;
Fig. 2 is the schematic diagram of workpiece prepared by overlaying method of the present invention.
Reference numeral in above-mentioned is as follows:
Mounting platform 1, pedestal 11, clamping device 12, front side clamping device 12-1, rear side clamping device 12-2, run-on tab 13;
Welder 2, wig-wag 21, water cooled welding torch 22, barral of a gun 22-1, ignition tip 22-2;
Tungsten carbide feeding device 3, tungsten carbide storaging bucket 31, tungsten carbide supply buncher 32, ribbon conveyer 33, head roll 33-1, follower rollers 33-2, conveyer belt 33-3, feeding funnel 34, tungsten carbide supply pipe 35, upper pipeline section 35-1, lower tube section 35-2, tungsten carbide supply mouth of pipe 35-3
Diamagnetic blow device 4, first spiral winding 41, second spiral winding 42;
Control cabinet 5, the source of welding current 6;
Tungsten carbide build-up wear-resistant workpiece 7, steel workpiece 71, overlay cladding 72, tungsten carbide particle 73;
Link 8, frame 9.
Detailed description of the invention
The present invention is when carrying out concrete orientation and describing, and the orientation up and down of Fig. 1 is the orientation up and down in describing, and the right of Fig. 1 is the front in describing, and the left of Fig. 1 is the rear in describing.
(embodiment 1)
See Fig. 1, the tungsten carbide suspension build-up welding apparatus of the present embodiment comprises mounting platform 1, welder 2, tungsten carbide feeding device 3, diamagnetic blow device 4, control cabinet 5, the source of welding current 6, link 8 and frame 9.
Mounting platform 1 mainly comprises pedestal 11, clamping device 12 and run-on tab 13.Pedestal 11 is located on the ground.Clamping device 12 comprises front side clamping device 12-1 and rear side clamping device 12-2.The position, front end that front side clamping device 12-1 and rear side clamping device 12-2 is fixedly installed on the upper surface of pedestal 11 from top respectively and position, rear end.Described run-on tab 13 is fixedly installed on the upper surface of pedestal 11 from top, between front side clamping device 12-1 and rear side clamping device 12-2, and outside the working region being positioned at the upper surface of pedestal 11 (working region refers to the position of placing and treating built-up welding workpiece 71).Because the welding starting the arc there will be the defects such as arc crater often, therefore on run-on tab 13, the starting the arc can avoid the weld defect on workpiece.
Frame 9 is fixed in building structure, and welder 2 is arranged on (not shown in FIG.) in frame 9.
Welder 2 comprises horizontal dolly, lifting device, wire-feed motor, wig-wag support, wig-wag 21 and water cooled welding torch 22, and wig-wag 21 is by the mechanical wig-wag of servo system control, is used for carrying and controlling water cooled welding torch 22.The structure of horizontal dolly, lifting device, wire-feed motor, wig-wag support can with reference to the 12nd page the 34th section to 36 sections, Chinese patent literature CN102107315A description.Horizontal dolly can drive wig-wag 21 to carry out sagittal movement relative to frame 9.Wire-feed motor is arranged on horizontal dolly, and is driven by corresponding motor.Lifting device is arranged on the vehicle frame of horizontal dolly, and wig-wag support installing is on lifting device, and wig-wag 21 is fixed on the bottom of wig-wag support by its holder.
Wig-wag 21 comprises driver and transmission mechanism thereof, and driver is servomotor, and described servomotor is electrically connected with control cabinet 5.The servomotor of the present embodiment adopts AC servo motor; Transmission mechanism is a linear movement module, is arranged on line slideway, and described line slideway is feeding guide rail.Transmission mechanism comprises the ball-screw, feed screw nut and the planker that are linked in sequence.Wherein, ball-screw and line slideway be arranged in parallel, and ball-screw is fixedly connected with the main shaft of AC servo motor by shaft coupling; Feed screw nut and ball-screw threaded engagement, and feed screw nut and line slideway are slidably connected.Planker is fixedly connected on feed screw nut, and planker is fixedly connected with welding gun seat.Water cooled welding torch 22 vertical arranges and is fixedly mounted on the welding gun seat of wig-wag, and water cooled welding torch 22 is positioned at the top of the pedestal 11 of mounting platform 1.During use, AC servo motor positive and reverse return transfers to drive ball-screw positive and negative rotation, thus drive feed screw nut linearly guide rail move, the planker be fixedly connected on feed screw nut is moved, thus make water cooled welding torch 22 linearly guide rail walk back and forth and realize along left and right to the swing of vertical guide arranged.The swing speed of water cooled welding torch 22, all can by the control realization of servomotor in dead time of left and right edge and swing width.
The material of water cooled welding torch 22 is bronze, and water cooled welding torch 22 is electrically connected with the source of welding current 6.The described source of welding current 6 is the source of welding current of gas shielded arc welding, and maximum current is 500A, and the control end of the source of welding current 6 is electrically connected with the control signal output of control cabinet 5.
Water cooled welding torch 22 comprises barral of a gun 22-1, ignition tip 22-2 and cooling water circulating device.When carrying out built-up welding, cooling water circulating device can cool barral of a gun 22-1 and ignition tip 22-2, the appearance of the situation therefore using water cooled welding torch 22 that the heat produced because of long continuous built-up welding can be avoided to cause welding gun 22-1 and ignition tip 22-2 to lose efficacy.
The lower end of barral of a gun 22-1 is fixedly connected with frame 8, and described link 8 is rectangular slab, link is offered two through holes, and barral of a gun 22-1 is fixedly connected with one of them through hole of link 8.
Tungsten carbide feeding device 3 is arranged in frame 9, and tungsten carbide feeding device 3 comprises tungsten carbide storaging bucket 31, tungsten carbide supply buncher 32, ribbon conveyer 33, feeding funnel 34 and tungsten carbide supply pipe 35.Tungsten carbide storaging bucket 31 is positioned at above feeding funnel 34, it is inner that head roll 33-1, the follower rollers 33-2 of ribbon conveyer 33 and conveyer belt 33-3 are all positioned at feeding funnel 34, and head roll 33-1 and follower rollers 33-2 is rotationally connected by corresponding bearing and feeding funnel 34 by respective axle, conveyer belt 33-3 is arranged around head roll 33-1 and follower rollers 33-2.
Have tungsten carbide particle in tungsten carbide storaging bucket 31, the particle diameter of described tungsten carbide particle is 1.1 ~ 1.7mm, and the discharging opening of tungsten carbide storaging bucket 31 is positioned at the top of the conveyer belt 33-3 of the ribbon conveyer 33 of feeding funnel 34.
The rotating speed of tungsten carbide supply buncher (hereinafter referred to as buncher) 32 is adjustable, and the control end of this buncher 32 and power end are electrically connected respectively to the corresponding port of control cabinet 5.The rotating shaft of buncher 32 is fixedly connected with by the termination of stretching out feeding funnel 34 of shaft coupling with the axle of the head roll 33-1 of ribbon conveyer 33.
The top cover of feeding funnel 34 is provided with charging aperture, and described charging aperture is connected with the discharging opening of tungsten carbide storaging bucket 31.The discharging opening of feeding funnel 34 is connected with the charging port of tungsten carbide supply pipe 35.The upper pipeline section 35-1 that described tungsten carbide supply pipe 35 is arranged by vertical and the lower tube section 35-2 be obliquely installed forms, and the angle of lower tube section 35-2 and upper pipeline section 35-1 is 135 ° ~ 150 °.The upper end mouth of pipe of upper pipeline section 35-1 is the charging port of tungsten carbide supply pipe 35; The lower end mouth of pipe of lower tube section 35-2 is the tungsten carbide supply mouth of pipe 35-3 of tungsten carbide supply pipe 35, and described tungsten carbide supply mouth of pipe 35-3 is positioned at the top of the working region of the pedestal 11 of mounting platform 1.Lower tube section 35-2 is fixed in link 8, thus lower tube section 35-2 moves along with the barral of a gun 22-1 of water cooled welding torch 22.
Lower tube section 35-2 adopts flexible pipe, and its telescopicing performance can meet lower tube section 35-2 along with welding gun 22 on workpiece 71, carry out the scope of movement.Lower tube section 35-2 also can adopt bellows.
During built-up welding, tungsten carbide particle in tungsten carbide storaging bucket 31 is fallen on the conveyer belt 33-3 of ribbon conveyer 33 under gravity, head roll 33-1 is under the driving of tungsten carbide supply buncher 32, the tungsten carbide particle that driving conveying belt 33-3 loads moves from left to right, until tungsten carbide particle falls from conveyer belt 33-3, enter tungsten carbide supply pipe 35 from the lower end discharging opening of feeding funnel 34, finally flow out from tungsten carbide supply mouth of pipe 35-3 and fall the position forming molten bath of steel workpiece 71.
Because the rotating speed of tungsten carbide supply buncher 32 is adjustable, therefore according to the requirement of workpiece postwelding distribution density, the feeding amount of the tungsten carbide particle carried can be controlled by regulating the rotating speed of buncher 32; When workpiece postwelding tungsten carbide particle distribution density is higher, increases the rotating speed of buncher 32, and when workpiece postwelding tungsten carbide particle distribution density is lower, just can reduce the rotating speed of buncher 32.
Described diamagnetic blow device 4 is made up of two groups of spiral windings, is respectively the first spiral winding 41 and the second spiral winding 42.First spiral winding 41 and the second spiral winding 42 are electrically connected with control cabinet 5 (only drawing the first spiral winding 41 in Fig. 1 to be electrically connected with control cabinet 5), and the first spiral winding 41 is connected with AC power (not shown in FIG.) respectively with the second spiral winding 42.First spiral winding 41 and the second spiral winding 42 are fixed on the both sides, front and back of the lower end of water cooled welding torch 22, and are positioned at the top of the working region of the pedestal 11 of mounting platform 1.During work, diamagnetic blow device 4 is followed welding gun 22 and is moved, magnetic field is produced by flowing through alternating current in the first spiral winding 41 and the second spiral winding 42, guarantee welding arc stablility is continuous, bring suitable magnetic agitation to molten bath molten steel simultaneously, the tungsten carbide particle in molten bath is evenly distributed.
Control circuit and corresponding controller are installed in described control cabinet 5.Described each controller includes power input, power output end and control end.Described controller has the AC power controller of traveling controller, tilt control, speed-regulating motor controller, wire feed controller, source of welding current controller, diamagnetic blow device 4.Traveling controller controls advancing of horizontal dolly, and tilt control controls the swing of wig-wag 21, and speed-regulating motor controller controls the rotating speed of tungsten carbide supply buncher 32, and wire feed controller controls wire-feed motor, and source of welding current controller controls the source of welding current 6.Control circuit is provided with walk signal output, swinging signal output, tungsten carbide supply buncher signal output part, wire feed signal output part, source of welding current signal output part, ac supply signal output.
The walk signal output of control circuit is electrically connected with the control end of traveling controller, the swinging signal output of control circuit is electrically connected with the control end of tilt control, the tungsten carbide supply buncher signal output part of control circuit is electrically connected with the control end of speed-regulating motor controller, the wire feed signal output part of control circuit is electrically connected with the control end of wire feed controller, the source of welding current signal output part of control circuit is electrically connected with the control end of source of welding current controller, and the ac supply signal output of control circuit is electrically connected with the control end of AC power controller.
Use the tungsten carbide suspension overlaying method of said apparatus, comprise the following steps:
1. be placed on the pedestal 11 of mounting platform 1 by steel workpiece 71, described steel workpiece 71 is cast by Q235 steel plate and is formed; Steel workpiece 71 is clamped between the clamping device 12-1 and rear side clamping device 12-2 of front side from front and rear direction by clamping device 12, makes steel workpiece 71 clamping on mounting platform 1, and the built-up welding region needing built-up welding upward.After clamping completes, preheating is carried out to workpiece 71, make workpiece 71 temperature rise to 200 DEG C ~ 300 DEG C.
2. the acute angle adjusting the lower tube section 35-2 of tungsten carbide supply pipe 35 and the angle of vertical guide is 30 ° ~ 45 ° (being 30 °) in the present embodiment, and the tungsten carbide of tungsten carbide supply pipe 35 supply mouth of pipe 35-3 distance steel workpiece 71 needs to be 28mm in portion faces 20mm ~ 35mm(the present embodiment of built-up welding).
3. the water cooled welding torch 22 adjusting welder 2 is arranged in the top of run-on tab 13 and the sagittal side (the present embodiment is front side) in built-up welding region; Welding wire is sent in water cooled welding torch 22 by wire-feed motor, starts cooling water circulating device before using, and adjustment water cooled welding torch 22 and the distance of the upward and downward in the built-up welding region of steel workpiece 71 are be 28mm in 25mm ~ 35mm(the present embodiment).
4. to alternating current by 1A ~ 5A of the first spiral winding 41 of diamagnetic blow device 4 and the second spiral winding 42, the phase place of the electric current that the first spiral winding 41 and the second spiral winding 42 pass through is contrary.
5., under the control of control cabinet 5, the weld below wire-feed motor conveying welding wire to water cooled welding torch 22, described welding wire is CHS-50-6 welding wire for gas shielded welding, diameter 1.6mm.Protective gas used in the present embodiment is made up of 80% argon gas and 20% carbon dioxide.
Controlling welding current is be 200A in 170A ~ 230A(the present embodiment), weldingvoltage is be 30V in 25V ~ 35V(the present embodiment), welding big current is successively by the rifle head of water cooled welding torch 22, welding wire, workpiece 71 and run-on tab 13, the starting the arc on run-on tab 13 and make this position of run-on tab 13 and the temperature of welding wire end sharply increase, thus make wire melting.
After the starting the arc, water cooled welding torch 22 marches to the built-up welding overlying regions of steel workpiece 71 under the control of traveling controller, welding wire melts at the corresponding site in the built-up welding region of workpiece 71 and makes this corresponding site form molten bath, control buncher, tungsten carbide particle is made to fall into molten bath from the mouth of pipe 35-3 of tungsten carbide supply pipe 35, under the magnetic agitation effect of the first spiral winding 41 and the second spiral winding 42, molten steel in molten bath is stirred, make tungsten carbide particle in molten bath in steel welter, during to molten steel solidification, tungsten carbide particle is cemented in former molten bath with the form suspended.
Water cooled welding torch 22 also swings while walking backward under the control of tilt control, the speed of travel of water cooled welding torch 22 is 100mm ~ 200mm/min(the present embodiment is 100mm/min), the swing width of water cooled welding torch 22 is 20 ~ 30mm(the present embodiment is 30mm), the swing speed of water cooled welding torch 22 is 25 ~ 40mm/min(the present embodiment is 30mm/min); Thus in the region that the sagittal 30mm in the built-up welding region of steel workpiece 71 is wide the overlay cladding 72 of built-up welding one deck parcel tungsten carbide particle 73, and obtain tungsten carbide build-up wear-resistant workpiece 7(and see Fig. 2).Tungsten carbide particle 73 even dispersion distribution in overlay cladding 72, integrated suspension effect fulfilling rate reaches 78%.
If desired increase the thickness of overlay cladding, then above-mentioned steps is repeated to above-mentioned position and carry out built-up welding, until obtain satisfactory overlay cladding thickness.
In the process of carrying out built-up welding, by changing the speed-regulating motor controller in control cabinet 5, can control the tungsten carbide particle flowed out from tungsten carbide supply pipe 35 number; When the faster rotational speed of buncher 32, the tungsten carbide particle entering molten bath increases, and when the spin down of buncher 32, the tungsten carbide particle entering molten bath reduces.
Claims (8)
1. a tungsten carbide suspension overlaying method, is characterized in that comprising the following steps:
1. by steel workpiece (71) clamping on mounting platform (1), and the portion faces needing built-up welding is upward, carries out preheating after clamping completes to steel workpiece (71);
2. adjusting the lower tube section (35-2) of tungsten carbide supply pipe (35) is 30 ° ~ 45 ° with the angle of vertical guide, and the tungsten carbide of tungsten carbide supply pipe (35) the supply mouth of pipe (35-3) distance steel workpiece (71) needs the portion faces 20 mm ~ 35mm of built-up welding;
3. the water cooled welding torch (22) adjusting welder (2) is positioned at the top in the built-up welding region of steel workpiece (71) and the sagittal side in built-up welding region; Welding wire is sent in water cooled welding torch (22) by wire-feed motor, starts the cooling water circulating device of welding gun before using;
4. alternating current is passed through to first spiral winding (41) of the diamagnetic blow device (4) of the both sides, lower end of water cooled welding torch and the second spiral winding (42);
5., under the control of control cabinet (5), wire-feed motor conveying welding wire is to the weld of water cooled welding torch (22) below; Welding big current successively by the pikestaff of water cooled welding torch (22), welding wire and run-on tab (13), in the upper starting the arc of run-on tab (13);
After the starting the arc, the lower tube section (35-2) of tungsten carbide supply pipe (35) marches to the built-up welding overlying regions of steel workpiece (71) along with water cooled welding torch (22), welding wire melts at the corresponding site in the built-up welding region of steel workpiece (71) and makes this corresponding site form molten bath, control tungsten carbide supply buncher (32) of tungsten carbide feeding device (3), tungsten carbide particle is made to fall into molten bath from the mouth of pipe of the tungsten carbide supply pipe (35) of tungsten carbide feeding device (3), under the magnetic agitation effect of the first spiral winding (41) and the second spiral winding (42), molten steel in molten bath stirs, make tungsten carbide particle in molten bath in steel welter, during to molten steel solidification, tungsten carbide particle is cemented in former molten bath with the form suspended,
Water cooled welding torch (22) also swings while walking from front to back under the control of tilt control, thus after welding gun moves from front to back, the built-up welding overlay cladding (72) of one deck parcel tungsten carbide particle (73) in the sagittal wobble area in the built-up welding region of steel workpiece (71);
When needs increase overlay cladding thickness, repeat above-mentioned steps 5..
2. tungsten carbide suspension overlaying method according to claim 1, it is characterized in that: step 4. in first spiral winding (41) of diamagnetic blow device (4) and the second spiral winding (42) by the alternating current of 1A ~ 5A, the phase place of the electric current that the first spiral winding (41) and the second spiral winding (42) pass through is contrary.
3. tungsten carbide suspension overlaying method according to claim 1, it is characterized in that: step is 5. in weld deposit process, when the faster rotational speed of tungsten carbide supply buncher (32) of tungsten carbide feeding device (3), the tungsten carbide particle entering molten bath increases, when the spin down of tungsten carbide supply buncher (32), the tungsten carbide particle entering molten bath reduces.
4. tungsten carbide suspension overlaying method according to claim 1, it is characterized in that: the speed of travel of water cooled welding torch (22) is 100 ~ 200mm/min, swing width is 20 ~ 30mm, after welding gun moves from front to back, the overlay cladding (72) of built-up welding one deck parcel tungsten carbide particle (73) in the region that the sagittal 20 ~ 30mm in the built-up welding region of steel workpiece (71) is wide.
5. the tungsten carbide suspension build-up welding apparatus that uses of a tungsten carbide suspension overlaying method as claimed in claim 1, comprise mounting platform (1), welder (2), the source of welding current (6), frame (9), it is characterized in that: also comprise tungsten carbide feeding device (3) and diamagnetic blow device (4), control cabinet (5) and link (8);
Welder (2) comprises horizontal dolly, lifting device, wire-feed motor, wig-wag support, wig-wag (21) and water cooled welding torch (22), water cooled welding torch (22) vertical arranges and is arranged on the welding gun seat of wig-wag (21), and water cooled welding torch (22) is positioned at mounting platform (1) top, water cooled welding torch (22) is connected with the source of welding current (6);
Tungsten carbide feeding device (3) is arranged in frame (9), comprises tungsten carbide storaging bucket (31), tungsten carbide supply buncher (32), ribbon conveyer (33), feeding funnel (34) and tungsten carbide supply pipe (35); Tungsten carbide storaging bucket (31) is positioned at feeding funnel (34) top, and it is inner that ribbon conveyer (33) is positioned at feeding funnel (34); The top cover of feeding funnel (34) is provided with charging aperture, and described charging aperture is connected with the discharging opening of tungsten carbide storaging bucket (31); Tungsten carbide storaging bucket has tungsten carbide particle in (31), and the discharging opening of tungsten carbide storaging bucket (31) is positioned at feeding belt (33-3) top of the ribbon conveyer (33) of feeding funnel (34); The discharging opening of feeding funnel (34) is connected with the charging port of tungsten carbide supply pipe (35), the upper pipeline section (35-1) that described tungsten carbide supply pipe (35) is arranged by vertical and the lower tube section (35-2) be obliquely installed form, and lower tube section (35-2) is 30 ° ~ 45 ° with the angle of vertical guide; The lower end mouth of pipe of lower tube section (35-2) is the tungsten carbide supply mouth of pipe (35-3) of tungsten carbide supply pipe (35), and the described tungsten carbide supply mouth of pipe (35-3) is positioned at the top of mounting platform (1);
Link (8) is fixed on the lower end of the barral of a gun (22-1) of water cooled welding torch (22), described link (8) is offered two through holes, the barral of a gun (22-1) of water cooled welding torch (22) is fixedly connected with one of them through hole of link (8), and the lower tube section (35-2) of tungsten carbide supply pipe (35) is fixedly connected with another through hole of link (8);
Described diamagnetic blow device (4) is made up of two groups of spiral windings, be respectively the first spiral winding (41) and the second spiral winding (42), first spiral winding (41) is connected with AC power respectively with the second spiral winding (42), first spiral winding (41) and the second spiral winding (42) are fixed on the both sides, lower end of water cooled welding torch (22), and are positioned at pedestal (11) top of mounting platform (1).
6. tungsten carbide suspension build-up welding apparatus according to claim 5, is characterized in that: tungsten carbide storaging bucket has tungsten carbide particle in (31), the particle diameter of described tungsten carbide particle is 1.1 ~ 1.7mm.
7. tungsten carbide suspension build-up welding apparatus according to claim 5, it is characterized in that: the lower tube section (35-2) of tungsten carbide supply pipe (35) adopts flexible pipe, its telescopicing performance makes lower tube section (35-2) can move on workpiece (71) along with welding gun (22).
8. tungsten carbide suspension build-up welding apparatus according to claim 5, is characterized in that: be provided with control circuit and corresponding controller in described control cabinet (5); Described each controller includes power input, power output end and control end; Described controller has traveling controller, tilt control, tungsten carbide to supply the AC power controller of speed-regulating motor controller, wire feed controller, source of welding current controller, diamagnetic blow device; Control circuit is provided with walk signal output, swinging signal output, tungsten carbide supply buncher signal output part, wire feed signal output part, source of welding current signal output part, ac supply signal output;
The walk signal output of control circuit is electrically connected with the control end of traveling controller, the swinging signal output of control circuit is electrically connected with the control end of tilt control, the tungsten carbide supply buncher signal output part of control circuit is electrically connected with the control end that tungsten carbide supplies speed-regulating motor controller, the wire feed signal output part of control circuit is electrically connected with the control end of wire feed controller, the source of welding current signal output part of control circuit is electrically connected with the control end of source of welding current controller, the ac supply signal output of control circuit is electrically connected with the control end of AC power controller.
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| DE112015001324T5 (en) * | 2014-03-18 | 2017-01-05 | Vermeer Manufacturing Company | Automatic system for abrasive hardfacing |
| WO2016073919A1 (en) | 2014-11-07 | 2016-05-12 | Vermeer Manufacturing Company | Carbide-based hardfacing |
| CN104625448B (en) * | 2014-12-19 | 2016-06-29 | 山东天工岩土工程设备有限公司 | The processing method of a kind of tungsten carbide particle wearing layer structure and application |
| CN113245675B (en) * | 2021-06-29 | 2021-10-01 | 江苏金泰祥内外门业有限公司 | Automatic welding machine and using method thereof |
| CN115493726B (en) * | 2022-11-16 | 2023-05-05 | 之江实验室 | Vacuum anti-magnetic levitation force detector and application method thereof |
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