CN113333917A - Bidirectional wire feeding TIG welding mechanism and method - Google Patents
Bidirectional wire feeding TIG welding mechanism and method Download PDFInfo
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- CN113333917A CN113333917A CN202110768600.2A CN202110768600A CN113333917A CN 113333917 A CN113333917 A CN 113333917A CN 202110768600 A CN202110768600 A CN 202110768600A CN 113333917 A CN113333917 A CN 113333917A
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- 238000003466 welding Methods 0.000 title claims abstract description 169
- 230000007246 mechanism Effects 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 17
- 230000009471 action Effects 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims description 11
- 230000033001 locomotion Effects 0.000 description 5
- 239000011324 bead Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000005253 cladding Methods 0.000 description 3
- 239000010953 base metal Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001080 W alloy Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
Images
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
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
-
- 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
- B23K9/32—Accessories
Abstract
The invention provides a TIG welding mechanism and method with bidirectional wire feeding. The welding mechanism comprises two feed screw rods which are respectively arranged on two directions of a welding path, and a bracket for erecting the two feed screw rods, wherein the bracket is fixed on welding equipment; the bracket comprises an upper bracket rod, a lower bracket rod, upper electric cylinders respectively arranged at two distal ends of the upper bracket rod and lower electric cylinders respectively arranged at two distal ends of the lower bracket rod, connecting rods are respectively hinged at the middle parts of two sides of the upper bracket rod, and the lower ends of the connecting rods are respectively hinged with the upper ends of the wire feeding rods at the same side; in addition, the connecting rod and the upper surface of sending a pole all are equipped with the slide rail, go up the end of electric cylinder and lower electric cylinder's piston rod and articulate respectively has a slider, and the slider that goes up electric cylinder and connect is connected with the slide rail cooperation on the connecting rod, and the slider that lower electric cylinder connects is connected with the slide rail on sending a pole to the angle of sending the lead screw is adjusted under last electric cylinder and the combined action of lower electric cylinder.
Description
Technical Field
The invention relates to the technical field of additive manufacturing, in particular to a TIG welding mechanism and method for bidirectional wire feeding.
Background
TIG welding is a welding process in which a base metal and a filler wire are melted by an arc generated between an electrode and a base metal (workpiece) under the protection of an inert gas using tungsten or a tungsten alloy as an electrode material. At present, TIG welding can be divided into manual welding, semi-automatic welding and automatic welding according to operation modes. They all have in common that: during operation, the filling wire can only be fed from the side of the electrode in one direction. For manual welding and semi-automatic welding, the wire feeding direction and the advancing direction can be adjusted freely. However, when the method is applied to batch production, manual welding and semi-automatic welding cannot be applied to automatic production, and the efficiency is low. The automatic welding has high automation degree, but the single-direction wire feeding is adopted in the market at present, the relative position between the welding wire and the electrode is fixed, namely, the welding wire can only advance towards the opposite direction of the wire feeding, and the biggest defect of the mode is that the reverse welding in the same path can not be carried out.
TIG welding mechanism on the market can only weld in the single direction, leads to putting out arc and starting point increase, causes the welding plane height not level, causes the cladding layer defect easily. This method requires that the welding is performed by returning to the starting point every time, and a lost motion operation is present midway, so that continuous welding cannot be performed, and welding efficiency is reduced.
In the prior art, application publication No. CN 105904065 a discloses an adjustable two-way TIG automatic welding fixture that send a angle, including installation pole, clamp, flexible guiding mechanism, flexible fixing base, angle adjustment mechanism, the clamp with installation pole fixed connection, welder can adorn and press from both sides in the clamp. The wire feeding angle adjusting device adopts a symmetrical wire feeding mode, can perform bidirectional welding, solves the problem that the prior art only has low unidirectional welding efficiency, and has accurate and reliable wire feeding angle adjustment and high operation stability. However, in the operation process of the clamp, manual adjustment needs to be performed, for example, the adjusting screw needs to be manually screwed to adjust the relative distance between the first adjusting seat and the second adjusting seat, so as to perform telescopic adjustment of the telescopic fixed seat relative to the vertical distance of the clamp; in addition, in the adjustment of the angle adjustment mechanism, the position of the first pull rod relative to the first pin needs to be adjusted and the position of the second pull rod relative to the second pin needs to be adjusted through the screwing of the nut, so as to adjust the arrangement angles of the first angle adjustment rod and the second angle adjustment rod. Above-mentioned scheme needs manual regulation, and is not intelligent enough, especially when welding to different materials or object, manual operation can be relatively frequent, increases the manual operation volume, and simultaneously, whether the angle that obtains of regulation is suitable not just once can accurately be adjusted and obtain, need confirm repeatedly, and what is the situation it still has two angle adjustment mechanism, and the angle that needs to guarantee two angle adjustment mechanism is all the same and is fit for current welding condition, and the requirement is higher relatively.
Disclosure of Invention
In view of this, the technical problem to be solved by the present invention is to provide a bidirectional wire feeding TIG welding mechanism and method, which can realize bidirectional wire feeding, automatically adjust the wire feeding angle, and solve the problems of large manual operation degree and insufficient precision in the prior art.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a bidirectional wire feeding TIG welding mechanism comprises two wire feeding rods respectively arranged in two directions of a welding path and a bracket for erecting the two wire feeding rods, wherein the bracket is fixed on welding equipment and can be specifically fixed on a welding gun or other structures meeting the installation requirement;
the bracket comprises an upper bracket rod, a lower bracket rod, upper electric cylinders respectively arranged at two distal ends of the upper bracket rod and lower electric cylinders respectively arranged at two distal ends of the lower bracket rod, connecting rods are respectively hinged at the middle parts of two sides of the upper bracket rod, and the lower ends of the connecting rods are respectively hinged with the upper ends of the wire feeding rods at the same side;
in addition, the connecting rod and the upper surface of sending a pole all are equipped with the slide rail, go up the end of electric cylinder and lower electric cylinder's piston rod and articulate respectively has a slider, and the slider that goes up electric cylinder and connect is connected with the slide rail cooperation on the connecting rod, and the slider that lower electric cylinder connects is connected with the slide rail on sending a pole to the angle of sending the lead screw is adjusted under last electric cylinder and the combined action of lower electric cylinder.
According to the invention, the piston rod of the upper electric cylinder drives the sliding block to slide when reciprocating, so that the left and right swinging of the connecting rod is controlled; meanwhile, the piston rod of the lower electric cylinder drives the sliding block to slide when reciprocating, so that the up-and-down swing of the screw feeding rod is controlled. In the invention, the swinging of the connecting rod or the wire feeding rod is adjusted through the matching of the sliding rail and the sliding block, the adjustment is relatively soft, but the adjustable amplitude is relatively large.
Further, still include control system, control system includes the PLC controller, the PLC controller is connected electric cylinder and lower electric cylinder respectively for four electric cylinder pass through PLC controller individual control. The PLC controller is used for adjusting the extension and contraction of piston rods of the upper electric cylinder and the lower electric cylinder so as to adjust the welding angle of the screw feeding rod.
Furthermore, the welding wires of the two wire feeding rods are respectively pushed independently through the two wire feeding motors, the wire feeding motors are connected with the PLC, the welding starting direction is confirmed according to the welding requirement during working, and the wire feeding motors in the advancing direction of the welding mechanism are selected for feeding the wire feeding rods in the direction.
Preferably, the support is fixed on the welding gun, the middle parts of the upper support rod and the lower support rod are respectively provided with a semicircular clamping part matched with the surface of the welding gun, and the clamping parts are fixed by bolts through semicircular clamping fixing parts.
Preferably, during welding, the included angle between the screw feeding rod and the welding gun is controlled to be 70-80 degrees.
A TIG welding method with bidirectional wire feeding comprises the following steps:
before the welding work starts, according to the welding requirement, a PLC controller sends out an instruction, and the four electric cylinders work, so that the connecting rod and the wire feeding rod are driven to swing, and the included angle between the wire feeding rod and a welding gun is 70-80 degrees;
when the welding work starts, the welding power supply is switched on, the welding starting direction is confirmed according to the welding requirement, the PLC controls the wire feeding motor in the advancing direction of the welding mechanism to be electrified to feed wires for the wire feeding rod in the direction, the welding seam starts to be welded in the advancing process of the welding mechanism, and the other wire feeding motor is in a power-off state;
after the welding of the welding seam in the advancing direction is finished, the PLC controller controls the wire feeding motor which works at present to enter a power-off state to stop wire feeding, the welding mechanism prepares for return stroke, at the moment, the PLC controller controls the wire feeding motor in the return stroke direction to feed wires for the corresponding wire feeding rod, welding of the welding seam on the return stroke path starts, and the wire feeding motor in the return stroke direction enters the power-off state to stop wire feeding until the welding of the welding seam on the return stroke path is finished;
and repeating the switching process of the working state of the wire feeding motor in the advancing direction and the corresponding direction of the welding mechanism in the welding process until the welding of the welding seam is completed.
When the invention is used for welding a straight reciprocating welding seam (welding bead), a proper wire feeding group can be called according to different trends. Therefore, the method can deal with welding seams (welding beads) with various complex paths, can reduce arc blowout and arc starting points, improves the flatness of a welding plane, and can effectively reduce the probability of generating defects of a cladding layer; the idle movement time for returning to the welding starting point for each welding due to one-way welding can be reduced, and the welding efficiency is improved.
Drawings
FIG. 1 is a schematic perspective view of a welding mechanism according to the present invention;
FIG. 2 is a schematic front view of the welding mechanism of the present invention;
FIG. 3 is a schematic view of the connection of the welding mechanism of the present invention in an operational state;
fig. 4 is a working state diagram of the welding mechanism of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description is given with reference to specific embodiments.
PREFERRED EMBODIMENTS
The TIG welding mechanism with bidirectional wire feeding as shown in fig. 1-3 includes two wire feeding rods 1 respectively arranged in two directions of a welding path, and a bracket 2 for erecting the two wire feeding rods 1, wherein the bracket 2 is fixed on a welding gun 3, and in addition, the bracket 2 can also be fixed on other structures of welding equipment which meet the installation requirements;
the support 2 comprises an upper support rod 21, a lower support rod 22, upper electric cylinders 23 respectively arranged at two distal ends of the upper support rod 21 and lower electric cylinders 24 respectively arranged at two distal ends of the lower support rod 22, the middle parts of two sides of the upper support rod 21 are respectively hinged with a connecting rod 4, and the lower end of the connecting rod 4 is respectively hinged with the upper end of the wire feeding rod 1 at the same side;
in addition, the upper surfaces of the connecting rod 4 and the feed screw rod 1 are both provided with a slide rail 5, the tail ends of the piston rods of the upper electric cylinder 23 and the lower electric cylinder 24 are respectively hinged with a slide block 6, the slide block 6 connected with the upper electric cylinder 23 is matched and connected with the slide rail 5 on the connecting rod 4, and the slide block 6 connected with the lower electric cylinder 24 is connected with the slide rail 5 on the feed screw rod 1, so that the angle of the feed screw rod 1 is adjusted under the combined action of the upper electric cylinder 23 and the lower electric cylinder 24.
According to the technical scheme, the piston rod of the upper electric cylinder 23 drives the sliding block to slide when reciprocating, so that the left and right swinging of the connecting rod 4 is controlled; meanwhile, the piston rod of the lower electric cylinder 24 drives the sliding block to slide when reciprocating, so that the up-and-down swing of the screw feeding rod 1 is controlled. The adjustment of the pivoting movement of the connecting rod 4 or the wire feeder 1 is relatively gentle, but the adjustment is relatively large by the cooperation of the slide 5 and the slide 6.
The device also comprises a control system, wherein the control system comprises a PLC (programmable logic controller) 7, and the PLC 7 can be any product which can independently control a plurality of objects on the market. The PLC controller 7 is connected with an upper electric cylinder 23 and a lower electric cylinder 24, respectively, so that the four electric cylinders are individually controlled by the PLC controller 7. Specifically, the PLC 7 is used for adjusting the extension and contraction of the piston rods of the upper electric cylinder 23 and the lower electric cylinder 24 so as to adjust the welding angle of the feed screw rod 1.
Two welding wires that send lead screw 1 send the propelling movement alone through two wire motors 8 respectively, send wire motors 8 to be connected with PLC controller 7, and the during operation confirms the originated direction of welding according to the welding demand, chooses for use the ascending wire motors 8 that send of welding mechanism advancing direction to send the lead screw 1 to send for this side.
For fixing the holder to the welding gun 3, the middle portions of the upper holder bar 21 and the lower holder bar 22 are each provided with a semicircular engaging portion 25 engaging with the surface of the welding gun 3, and the engaging portion 25 is fixed by a bolt via a semicircular engaging fixture 26.
When the welding mechanism is used for welding, the included angle between the wire feeding rod 1 and the welding gun 3 is controlled to be 70-80 degrees.
The welding method by using the TIG welding mechanism with bidirectional wire feeding comprises the following steps:
before the welding work starts, according to the welding requirement, a PLC controller sends out an instruction, and the four electric cylinders work, so that the connecting rod and the wire feeding rod are driven to swing, and the included angle between the wire feeding rod and a welding gun is 70-80 degrees;
when the welding work starts, the welding power supply is switched on, the welding starting direction is confirmed according to the welding requirement, the PLC controls the wire feeding motor in the advancing direction of the welding mechanism to be electrified to feed wires for the wire feeding rod in the direction, the welding seam starts to be welded in the advancing process of the welding mechanism, and the other wire feeding motor is in a power-off state;
after the welding of the welding seam in the advancing direction is finished, the PLC controller controls the wire feeding motor which works at present to enter a power-off state to stop wire feeding, the welding mechanism prepares for return stroke, at the moment, the PLC controller controls the wire feeding motor in the return stroke direction to feed wires for the corresponding wire feeding rod, welding of the welding seam on the return stroke path starts, and the wire feeding motor in the return stroke direction enters the power-off state to stop wire feeding until the welding of the welding seam on the return stroke path is finished;
and repeating the switching process of the working state of the wire feeding motor in the advancing direction and the corresponding direction of the welding mechanism in the welding process until the welding of the welding seam is completed.
The working state diagram of the welding mechanism is shown in fig. 4, and during welding, one-way wire feeding can be understood, but the key point is that when a linear reciprocating welding seam (welding bead) is welded, a proper wire feeding group can be called according to different trends. Therefore, the method can deal with welding seams (welding beads) with various complex paths, can reduce arc blowout and arc starting points, improves the flatness of a welding plane, and can effectively reduce the probability of generating defects of a cladding layer; the idle movement time for returning to the welding starting point for each welding due to one-way welding can be reduced, and the welding efficiency is improved. The angle of the screw feeding rod can be automatically adjusted through the PLC, manual participation operation is not needed, the adjusting range and the adjusting range are larger, the safety is higher, and the automation degree is higher. Especially when the wire rod needs to be changed the welding wire, more convenience can be provided for the welding wire change to adjustment range by a wide margin, and operating space is bigger, can not influence welding efficiency.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. A TIG welding mechanism with bidirectional wire feeding is characterized in that,
the welding device comprises two feed screw rods and a bracket, wherein the two feed screw rods are respectively arranged in two directions of a welding path, the bracket is used for erecting the two feed screw rods, and the bracket is fixed on the welding device;
the bracket comprises an upper bracket rod, a lower bracket rod, upper electric cylinders respectively arranged at two distal ends of the upper bracket rod and lower electric cylinders respectively arranged at two distal ends of the lower bracket rod, connecting rods are respectively hinged at the middle parts of two sides of the upper bracket rod, and the lower ends of the connecting rods are respectively hinged with the upper ends of the wire feeding rods at the same side;
in addition, the connecting rod and the upper surface of sending a pole all are equipped with the slide rail, go up the end of electric cylinder and lower electric cylinder's piston rod and articulate respectively has a slider, and the slider that goes up electric cylinder and connect is connected with the slide rail cooperation on the connecting rod, and the slider that lower electric cylinder connects is connected with the slide rail on sending a pole to the angle of sending the lead screw is adjusted under last electric cylinder and the combined action of lower electric cylinder.
2. A bidirectional wire feed TIG welding mechanism as in claim 1, further comprising a control system, wherein the control system comprises a PLC controller, the PLC controller is connected to the upper electric cylinder and the lower electric cylinder, respectively, and the PLC controller adjusts the extension and retraction of the piston rods of the upper electric cylinder and the lower electric cylinder to adjust the welding angle of the wire feed rod.
3. A TIG welding mechanism with bidirectional wire feeding according to claim 1 or 2, wherein the welding wires of the two wire feeding rods are separately fed by two wire feeding motors, and the wire feeding motors are connected with the PLC controller.
4. A TIG welding mechanism for bidirectional wire feeding according to claim 3, wherein the bracket is fixed to the welding gun, and a semi-annular locking part engaged with a surface of the welding gun is provided at a middle portion of each of the upper bracket bar and the lower bracket bar, and the locking part is fixed by a bolt via a locking fixing member also having a semi-annular shape.
5. A TIG welding mechanism with a bidirectional wire feed according to claim 4, characterized in that an included angle between the wire feed rod and the welding gun is controlled to be 70-80 degrees during welding.
6. A welding method of a TIG welding mechanism with bidirectional wire feeding based on claim 4, characterized by comprising the following steps:
before the welding work starts, according to the welding requirement, a PLC controller sends out an instruction, and the four electric cylinders work, so that the connecting rod and the wire feeding rod are driven to swing, and the included angle between the wire feeding rod and a welding gun is 70-80 degrees;
when the welding work starts, the welding power supply is switched on, the welding starting direction is confirmed according to the welding requirement, the PLC controls the wire feeding motor in the advancing direction of the welding mechanism to be electrified to feed wires for the wire feeding rod in the direction, the welding seam starts to be welded in the advancing process of the welding mechanism, and the other wire feeding motor is in a power-off state;
after the welding of the welding seam in the advancing direction is finished, the PLC controller controls the wire feeding motor which works at present to enter a power-off state to stop wire feeding, the welding mechanism prepares for return stroke, at the moment, the PLC controller controls the wire feeding motor in the return stroke direction to feed wires for the corresponding wire feeding rod, welding of the welding seam on the return stroke path starts, and the wire feeding motor in the return stroke direction enters the power-off state to stop wire feeding until the welding of the welding seam on the return stroke path is finished;
and repeating the switching process of the working state of the wire feeding motor in the advancing direction and the corresponding direction of the welding mechanism in the welding process until the welding of the welding seam is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110768600.2A CN113333917A (en) | 2021-07-07 | 2021-07-07 | Bidirectional wire feeding TIG welding mechanism and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110768600.2A CN113333917A (en) | 2021-07-07 | 2021-07-07 | Bidirectional wire feeding TIG welding mechanism and method |
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| CN113333917A true CN113333917A (en) | 2021-09-03 |
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| CN202110768600.2A Pending CN113333917A (en) | 2021-07-07 | 2021-07-07 | Bidirectional wire feeding TIG welding mechanism and method |
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Cited By (2)
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| CN114101852A (en) * | 2021-10-27 | 2022-03-01 | 江苏大学 | Paraxial front wire feeding control method and device for functionally graded metal arc additive manufacturing |
| CN114131162A (en) * | 2021-12-22 | 2022-03-04 | 一重集团大连核电石化有限公司 | Welding wire position adjusting mechanism for deep and narrow weld joint welding |
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| CN114131162B (en) * | 2021-12-22 | 2023-09-01 | 一重集团大连核电石化有限公司 | Welding wire position adjusting mechanism for deep and narrow welding line welding |
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