CN106735733B - A kind of endoporus parts inner wall damage automatically controls Precision Pulse welder - Google Patents
A kind of endoporus parts inner wall damage automatically controls Precision Pulse welder Download PDFInfo
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- CN106735733B CN106735733B CN201611191499.4A CN201611191499A CN106735733B CN 106735733 B CN106735733 B CN 106735733B CN 201611191499 A CN201611191499 A CN 201611191499A CN 106735733 B CN106735733 B CN 106735733B
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- 238000003466 welding Methods 0.000 claims abstract description 49
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 230000008439 repair process Effects 0.000 claims abstract description 12
- YTCQFLFGFXZUSN-BAQGIRSFSA-N microline Chemical compound OC12OC3(C)COC2(O)C(C(/Cl)=C/C)=CC(=O)C21C3C2 YTCQFLFGFXZUSN-BAQGIRSFSA-N 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000005476 soldering Methods 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 210000003464 cuspid Anatomy 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
Abstract
Precision Pulse welder, including workpiece and equipment are automatically controlled the invention discloses a kind of damage of endoporus parts inner wall;Equipment is made of automatic wire feeder, lift bridge, guiding feed rod, front and rear fine tuning structure, left and right centering structure, automatic lifting structure, welding gun, auto-feed structure, rotating servo motor, automatic rotation structure and harness supporting structure;Automatic rotation structure includes support and guiding mechanism, gear wheel, gear wheel mounting bracket, live spindle and pinion gear;Auto-feed structure includes lead screw motor, feeding guide rod, rotatable folder rifle block, automatic wire feeder Wire outlet head, wire feed angular adjustment frame, feed motion limit switch, high-precision micro line slideway and feed screw.The damage of this endoporus parts inner wall automatically controls Precision Pulse welder, can efficiently repair the damage of endoporus parts sealing surface that traditional built-up welding is difficult to repair, part will not deform without deformation, workpiece in welding process after reparation.
Description
Technical field
The present invention relates to endoporus parts welder technical field, be specifically a kind of endoporus parts inner wall damage from
Dynamic control Precision Pulse welder.
Background technology
The big depth small diameter inner hole parts such as diesel-engine body, cylinder head valve seat, bearing block, piston ring, cylinder sleeve extensively should
Among mechanized equipment, influenced, inevitably occurred in abrasion, burn into scuffing etc. be subject to factors such as environmental corrosions
Wall damage, equipment failure will be caused when serious and can not normal use.As at diesel-engine body and liner packing face because of military service ring
Border is severe, corrosion, wear equivalent damage often occurs, causes the cooling water in water cavity to enter in air chamber, is influencing engine just
Often work.Therefore, how a kind of technology that can effectively repair the damage of endoporus parts inner wall surface is provided, is people in the art
Member's problem to be solved.Technique for overlaying is a kind of effective surface damage recovery technique, but utilizes traditional built-up welding skill
Art is difficult in narrow and small pore space operation, and it is larger that this is primarily due to existing various welding gun sizes, is not easy to insert endoporus work
Make, in addition traditional technique for overlaying because heat affecting it is larger, easily lead to workpiece deformation, it is impossible to meet precision welding needs.
The content of the invention
Precision Pulse welder is automatically controlled it is an object of the invention to provide a kind of damage of endoporus parts inner wall,
With soldering precision is high, soldering impact is small, heat affected area is small, bond strength is high, operating procedure is simple and has a wide range of application excellent
Point, to solve the problems mentioned in the above background technology.
To achieve the above object, the present invention provides following technical solution:A kind of automatic control of endoporus parts inner wall damage
Precision Pulse welder processed, including workpiece and equipment, the bottom of the equipment set workpiece, and equipment is electrically connected operation cabinet, if
It is standby to be connected in accurate Repair Welding Machine;The equipment is right by automatic wire feeder, lift bridge, guiding feed rod, front and rear fine tuning structure, left and right
Middle structure, automatic lifting structure, welding gun, auto-feed structure, rotating servo motor, automatic rotation structure and harness supporting structure
Composition, automatic wire feeder is set in the side at the top of lift bridge, lift bridge connects left and right centering structure by being oriented to feed rod, left
Fine tuning structure before and after the side of right centering structure is set, the top of left and right centering structure set automatic lifting structure, on lift bridge
Equipped with automatic rotation structure, automatic rotation structure includes support and guiding mechanism, gear wheel, gear wheel mounting bracket, rotation master
Axis and pinion gear, support and guiding mechanism are installed on the top of lift bridge, are watched in the side of support and guiding mechanism equipped with rotation
Motor is taken, harness supporting structure is equipped with the opposite side of support and guiding mechanism, supports and the bottom of guiding mechanism is connected with rotation
Turning main shaft, gear wheel, gear wheel pinion mate are fixedly connected with live spindle, pinion gear is connected on rotating servo motor,
The bottom of gear wheel is equipped with gear wheel mounting bracket, and the bottom of live spindle is connected with auto-feed structure, auto-feed structure
Including lead screw motor, feeding guide rod, rotatable folder rifle block, automatic wire feeder Wire outlet head, wire feed angular adjustment frame, feed motion limit
Bit switch, high-precision micro line slideway and feed screw, high-precision micro line slideway is connected in live spindle, high-precision
Spend one end installation lead screw motor of miniature line slideway, the other end of high-precision micro line slideway sets that feed motion is spacing to open
Close, lead screw motor connection feed screw, for feed screw through connection feeding guide rod, the bottom for feeding guide rod passes through rotatable folder rifle
Block installs welding gun, and feeding guide rod is also equipped with wire feed angular adjustment frame, and automatic feeding is set in the bottom of wire feed angular adjustment frame
Machine Wire outlet head.
As the further scheme of the present invention:The equipment is further equipped with high definition industrial camera, the installation of high definition industrial camera
In industrial camera adjustment rack, eyepiece is provided with high definition industrial camera.
As the further scheme of the present invention:The equipment is controlled by operation cabinet.
As the further scheme of the present invention:The lift bridge moves up and down on feed rod is oriented to.
Compared with prior art, beneficial effect of the present invention:
The damage of this endoporus parts inner wall automatically controls Precision Pulse welder, and it is difficult can efficiently to repair traditional built-up welding
With the damage of the endoporus parts sealing surface of reparation, part is without deformation after reparation, and repair layer dense structure, and bond strength is high,
Shaping, repairing effect can be welded with electron beam, Laser Welding compare favourably, by Precision Pulse control mode, relative laser during welding
The heating surface area of welding is big, so as to greatly improve welding efficiency;While ensure that efficient using pulse welding function, again
The temperature of workpiece can be reduced, workpiece is not deformed in welding process.
Brief description of the drawings
Fig. 1 is the workpiece and equipment connection diagram of the present invention;
Fig. 2 is the block diagram that the equipment of the present invention is equipped with;
Fig. 3 is the overall structure diagram of the present invention;
Fig. 4 is the auto-feed structure diagram of the present invention;
Fig. 5 is the automatic rotation structure structure diagram of the present invention;
Fig. 6 is the high definition industrial camera structure diagram of the present invention.
In figure:1- workpiece;2- operation cabinets;3- precision Repair Welding Machines;4- high definition industrial cameras;41- eyepieces;42- industrial cameras
Adjust rack;5- equipment;51- automatic wire feeders;52- lift bridges;53- is oriented to feed rod;Fine tuning structure before and after 54-;55- or so pairs
Middle structure;56- automatic lifting structures;57- welding guns;58- auto-feed structures;581- lead screw motors;582- feeds guide rod;583-
Rotatable folder rifle block;584- automatic wire feeder Wire outlet heads;585- wire feed angular adjustment framves;586- feed motion limit switches;
587- high-precision micro line slideways;588- feed screws;59- rotating servo motors;60- automatic rotation structures;601- is supported
And guiding mechanism;602- gear wheels;603- gear wheel mounting brackets;604- live spindles;605- pinion gears;61- harness supports
Structure.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
Please refer to Fig.1-6, in the embodiment of the present invention, a kind of endoporus parts inner wall damage automatically controls Precision Pulse weldering
Connection device, including workpiece 1 and equipment 5, the bottom of equipment 5 set workpiece 1, and equipment 5 is electrically connected operation cabinet 2, and equipment 5 is controlled by behaviour
Make cabinet 2, using high accurate intelligent control system, ensure during welding workpiece temperature will not be made excessive will not to cause deformation of products, if
Standby 5 are connected in accurate Repair Welding Machine 3, and equipment 5 is further equipped with high definition industrial camera 4, and high definition industrial camera 4 is installed on industrial camera
Adjust in rack 42, eyepiece 41 is provided with high definition industrial camera 4, due in parts internal work, for convenience of observing, installation
Monitoring system, when welding, are furnished with high definition industrial camera 4, and light source is shown on a display screen after treatment, person's observation easy to operation,
Real-time Butt welding gun up and down, left and right directions carry out fine adjustment, ensure that main shaft drives welding gun to realize and the concentric rotation of inner hole of workpiece
Turn.After welding, press power-off and authorize key, system can check each gas circuit and circuit conditions automatically, will before such as not up to breaking
To ask, man-machine interface has safety instruction, shows whether each position reaches powering-down requirements, after powering-down requirements are reached, cut-out weight
Point source, when welding, are furnished with high definition industrial camera 4, and light source is shown on display bottle after treatment, and person easy to operation sees;Equipment 5
By automatic wire feeder 51, lift bridge 52, it is oriented to feed rod 53, front and rear fine tuning structure 54, left and right centering structure 55, automatic lifting structure
56th, welding gun 57, auto-feed structure 58, rotating servo motor 59, automatic rotation structure 60 and harness supporting structure 61 form,
The side at the top of lift bridge 52 sets automatic wire feeder 51, and lift bridge 52 connects left and right centering structure by being oriented to feed rod 53
55, lift bridge 52 moves up and down on feed rod 53 is oriented to, fine tuning structure 54 before and after the side setting of left and right centering structure 55, front and rear
Fine tuning structure 54 realizes left and right centering structure 55 and finely tunes that the top of left and right centering structure 55 sets automatic lifting structure 56, rises
Drop bridge 52 is equipped with automatic rotation structure 60, and automatic rotation structure 60 includes support and guiding mechanism 601, gear wheel 602, canine tooth
Mounting bracket 603, live spindle 604 and pinion gear 605 are taken turns, support and guiding mechanism 601 are installed on the top of lift bridge 52,
The side of support and guiding mechanism 601 is equipped with rotating servo motor 59, and harness is equipped with the opposite side of support and guiding mechanism 601
The bottom of supporting structure 61, support and guiding mechanism 601 is connected with live spindle 604, and canine tooth is fixedly connected with live spindle 604
Wheel 602,602 pinion mate 605 of gear wheel, pinion gear 605 is connected on rotating servo motor 59, the bottom of gear wheel 602
Equipped with gear wheel mounting bracket 603, the bottom of live spindle 604 is connected with auto-feed structure 58, and auto-feed structure 58 is wrapped
Include lead screw motor 581, feeding guide rod 582, rotatable folder rifle block 583, automatic wire feeder Wire outlet head 584, wire feed angular adjustment frame
585th, feed motion limit switch 586, high-precision micro line slideway 587 and feed screw 588, high-precision micro line slideway
587 are connected in live spindle 604, and lead screw motor 581 is installed in one end of high-precision micro line slideway 587, and high accuracy is micro-
The other end of type line slideway 587 sets feed motion limit switch 586, and lead screw motor 581 connects feed screw 588, screw
Motor 581 drives feed screw 588 to rotate, and feed screw 588 leads to through connection feeding guide rod 582, the bottom of feeding guide rod 582
Cross rotatable folder rifle block 583 and welding gun 57 is installed, welding gun 57 is welded, and feeding guide rod 582 is also equipped with wire feed angular adjustment frame
585, wire feed angular adjustment frame 585 realizes the adjusting of angle, sets automatic wire feeder to go out in the bottom of wire feed angular adjustment frame 585
Silk first 584.
The damage of this endoporus parts inner wall automatically controls Precision Pulse welder, using interrupted high energy electric pulse,
Momentary arc is formed between electrode and workpiece 1, patching material and workpiece 1 is welded together rapidly, reaches metallurgical binding, from
And realize the recovery of 1 surface size of workpiece, the pulsed arc energy that high energy pulse precision welding technology uses during the work time
Input mode, is very different with general pulsed argon arc welding, and general pulsed argon arc welding uses sustained arc, i.e., between pulse
Gap is with the burning of low current pilot arc, its burst length is more than several seconds.The pulsed arc of high energy pulse welding technique uses
Be interrupted arc, i.e., be all made of per the generation of subpulse 3 starting the arc, arc maintenance, blow-out processes, the time of each pulse is
A few tens of milliseconds, there is the interval time of several seconds to more than ten seconds between two pulsed arcs, makes to be repaired workpiece 1 when having sufficient cooling
Between, the Precision Pulse welder that automatically controls of this endoporus parts inner wall damage has following features, and 1 soldering precision is high, leads to
The accurate control to pulse current and burst length is crossed, it is 0.2mm that minimum, which repairs width,;2 soldering impact is small, due to impulse action
Time is extremely short, and energy is concentrated, its soldering stress and post welding distortion are all smaller;3 heat affected areas are small, small to the heat input of matrix, base
Body is substantially without macroscopical thermal deformation;4 bond strengths are high, and matrix belongs to metallurgical binding with mending material, are adapted to various processing methods, will not go out
In conjunction with insecure, obscission;5 operating procedures are simple, it can be achieved that manual operations and automated control;6 have a wide range of application, can
Realize soldering, locally special-shaped surface reconditioning, the puzzled body field repair of precise repairing abrasion, burn into cut, crackle and defect,
Video system is employed, facilitates the welding at accurate position, while adds the treatment process of welding bead connector in welding process, you can
Avoid the surface defect easily occurred during manual operation, while the uniformity of still product is strong, quality is guaranteed, using it is high precisely
Intelligence control system, when welding, will not make workpiece temperature excessive will not cause deformation of products.
The damage of this endoporus parts inner wall automatically controls Precision Pulse welder, 220V, 50Hz alternating current access devices
5, air switch is stirred to after opening shelves, turn key switch, system energization, after system energization, 10 seconds system reaction time, from
I retrieves, and rear operation pages pop-up can normal operation.Operator issues an order to note to host computer:Host computer is 7 cun of touch-screens
Color text device, host computer start to note to slave computer signal after taking orders:Slave computer is programmable logic controller (PLC)
Programmable Logic Controller abridge PLC, hereinafter slave computer directly replaced with PLC, PLC receives signal
After start to control the operation of all parts structures, stepper motor rotation drives 56 Hoist Control Unit of automatic lifting structure to reach welding
Position, arrives welding region, early period, preparation work was completed in the debugging of lead screw motor 581 by auto-feed structure 58.Start to weld
Connect rear main shaft rotating servo motor 59 to rotate, pinion gear 605 drives gear wheel 602 to rotate live spindle 604, completes annular work
The welding action of 1 end face of part, the speed by automatic wire feeder Wire outlet head 584 are adjusted, and make wire feed rate and speed of welding effective
Combination, abrading section is efficiently repaired under the high-energy of electric arc.
In summary:Endoporus parts inner wall damage automatically controls Precision Pulse welder, and the present invention can be high
The traditional built-up welding of effect reparation is difficult to the damage for the endoporus parts sealing surface repaired, and part is without deformation after reparation, and repairs layer tissue
Densification, bond strength is high, shapes, and repairing effect can be welded with electron beam, Laser Welding compares favourably, and pass through Precision Pulse controlling party
Formula, when welding, are big with respect to the heating surface area of laser welding, so as to greatly improve welding efficiency;It is true using pulse welding function
While having protected efficient, and the temperature of workpiece can be reduced, workpiece 1 is not deformed in welding process.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference numeral in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical solution, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (5)
1. a kind of endoporus parts inner wall damage automatically controls Precision Pulse welder, including workpiece (1) and equipment (5),
It is characterized in that:Equipment (5) is equipped with lift bridge (52), and lift bridge (52) is equipped with automatic rotation structure (60), automatic rotation
Structure (60) includes support and guiding mechanism (601), gear wheel (602), gear wheel mounting bracket (603), live spindle (604)
With pinion gear (605), support and guiding mechanism (601) are installed in the top of lift bridge (52), in support and guiding mechanism (601)
Side be equipped with rotating servo motor (59), be equipped with harness supporting structure (61) in the opposite side of support and guiding mechanism (601),
The bottom of support and guiding mechanism (601) is connected with live spindle (604), and live spindle is fixedly connected with gear wheel on (604)
(602), gear wheel (602) pinion mate (605), pinion gear (605) are connected on rotating servo motor (59), gear wheel
(602) bottom is equipped with gear wheel mounting bracket (603), and the bottom of live spindle (604) is connected with auto-feed structure (58),
Auto-feed structure (58) includes lead screw motor (581), feeding guide rod (582), rotatable folder rifle block (583), automatic wire feeder
Wire outlet head (584), wire feed angular adjustment frame (585), feed motion limit switch (586), high-precision micro line slideway (587)
With feed screw (588), high-precision micro line slideway (587) is connected in live spindle (604), in high-precision micro straight line
One end installation lead screw motor (581) of guide rail (587), the other end of high-precision micro line slideway (587) set feed motion
Limit switch (586), lead screw motor (581) connection feed screw (588), feed screw (588) is through connection feeding guide rod
(582), welding gun (57) is installed in the bottom for feeding guide rod (582) by rotatable folder rifle block (583), and feeding guide rod (582) is also pacified
Equipped with wire feed angular adjustment frame (585), automatic wire feeder Wire outlet head (584) is set in the bottom of wire feed angular adjustment frame (585).
2. a kind of endoporus parts inner wall damage according to claim 1 automatically controls Precision Pulse welder, its
It is characterized in that:The equipment (5) is further equipped with high definition industrial camera (4), and high definition industrial camera (4) is adjusted installed in industrial camera
In rack (42), eyepiece (41) is provided with high definition industrial camera (4).
3. a kind of endoporus parts inner wall damage according to claim 1 automatically controls Precision Pulse welder, its
It is characterized in that:The equipment (5) is controlled by operation cabinet (2).
4. a kind of endoporus parts inner wall damage according to claim 1 automatically controls Precision Pulse welder, its
It is characterized in that:The lift bridge (52) moves up and down on feed rod (53) is oriented to.
5. a kind of endoporus parts inner wall damage according to claim 1 automatically controls Precision Pulse welder, its
It is characterized in that:The bottom of the equipment (5) sets workpiece (1), and equipment (5) is electrically connected operation cabinet (2), and equipment (5) is connected to essence
On close Repair Welding Machine (3);The equipment (5) is tied by automatic wire feeder (51), lift bridge (52), guiding feed rod (53), front and rear fine setting
Structure (54), left and right centering structure (55), automatic lifting structure (56), welding gun (57), auto-feed structure (58), rotating servo electricity
Machine (59), automatic rotation structure (60) and harness supporting structure (61) composition, are set certainly in the side at the top of lift bridge (52)
Dynamic wire-feed motor (51), lift bridge (52) connect left and right centering structure (55), left and right centering structure (55) by being oriented to feed rod (53)
Side set before and after fine tuning structure (54), the top of left and right centering structure (55) sets automatic lifting structure (56).
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US5030812A (en) * | 1989-06-13 | 1991-07-09 | Nkk Corporation | Method for one-side root pass welding of a pipe joint |
CN103273204A (en) * | 2013-06-09 | 2013-09-04 | 宣浩 | Electric spark overlay welding method |
CN103372713A (en) * | 2013-02-20 | 2013-10-30 | 天津工业大学 | Aero-engine blade damage repair method |
CN105382378A (en) * | 2015-10-27 | 2016-03-09 | 张荣斌 | Surfacing welding method for abraded large roll shaft |
CN105710519A (en) * | 2014-12-01 | 2016-06-29 | 陆峰 | Pulse microbeam plasma surfacing method for inner wall of steel pipe |
-
2016
- 2016-12-21 CN CN201611191499.4A patent/CN106735733B/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5030812A (en) * | 1989-06-13 | 1991-07-09 | Nkk Corporation | Method for one-side root pass welding of a pipe joint |
CN103372713A (en) * | 2013-02-20 | 2013-10-30 | 天津工业大学 | Aero-engine blade damage repair method |
CN103273204A (en) * | 2013-06-09 | 2013-09-04 | 宣浩 | Electric spark overlay welding method |
CN105710519A (en) * | 2014-12-01 | 2016-06-29 | 陆峰 | Pulse microbeam plasma surfacing method for inner wall of steel pipe |
CN105382378A (en) * | 2015-10-27 | 2016-03-09 | 张荣斌 | Surfacing welding method for abraded large roll shaft |
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