Background technology
At present, the outer soldering equipment of most large steel pipes with straight is all installed on the stationary plane of elevating mechanism and fixes with four wire bond heads, grounding wire device is connected to independently on ground wire lifting cantilever, carries out the mode of uniform motion carry out the welding of steel pipe outside weld by welding tractor support body.
The welding tractor of the outer soldering equipment of this type has carried all wt of steel pipe, and along with the caliber of steel pipe increases, the rigidity to welding tractor and drives structure require also larger.In welding process, welding tractor operation driving force deficiency can cause welding process not steady, causes the phenomenon of weld seam width inequality.Because welding tractor is the operation of support steel pipe, therefore trolley travelling precision depends on guide precision, when operation, driving mechanism provides power to order about welding tractor through rack-and-pinion transmission and travels at the uniform speed on heavy rail, but because the precision of the heavy rail of dolly is limited, has larger gap between wheel and heavy rail, when welding, welding slag skin and solder flux can drop on guide rail and tooth bar, as unclean in cleaning, can affect welding tractor running precision.
Summary of the invention
For addressing the above problem, the invention provides the outer welding machine of soldering tip movable type that a kind of welding precision is higher.
The technical solution adopted for the present invention to solve the technical problems is:
The outer welding machine of a kind of soldering tip movable type, comprise steel pipe conveying roller and the frame that is parallel to steel pipe conveying roller for horizontal positioned steel pipe, frame is provided with can be along the welding tractor of frame horizontal slip, the welding arm that lifting sliding rail is installed on welding tractor and can slides up and down along lifting sliding rail, the front end of welding arm is provided with plumb joint, and the side that the front end of welding arm is positioned at plumb joint is also provided with ground wire device.
Be further used as the improvement of technical solution of the present invention, steel pipe conveying roller comprises some horizontal feed rollers and is arranged at the rotating roller between horizontal feed roller, each rotating roller includes and is positioned at the rotation running roller of steel pipe conveying roller axis both sides and the reductor of driven rotary running roller rotation, and each horizontal feed roller comprises some transport rollers perpendicular to steel pipe conveying roller axis and drives the reductor of transport roller rotation.
Be further used as the improvement of technical solution of the present invention, frame is provided with twice tooth bar parallel to each other, the bottom of welding tractor be provided with two respectively with tooth bar meshed gears, between two gears, be provided with direction converter and drive two gears rotate output motor.
Be further used as the improvement of technical solution of the present invention, welding tractor is provided with wire reel and flux restoring dust arrester.
Be further used as the improvement of technical solution of the present invention, welding arm is provided with can be along the tracking slide unit of welding arm planar slide, and plumb joint is fixed on to be followed the tracks of on slide unit, and plumb joint place is provided with collects position while welding signal and feed back to control the cephalomotor sensor of welding.
Beneficial effect of the present invention: the outer welding machine of this soldering tip movable type is statically placed in steel pipe to be welded on steel pipe conveying roller, be connected to form loop by ground wire device and steel pipe, control the position of plumb joint by slip, the slip of the relative lifting sliding rail of welding arm and the slip of the relative frame of welding tractor of the relative welding arm of plumb joint, thereby make steel pipe seam welding can reach higher precision, and effectively promote weldquality.
Detailed description of the invention
With reference to Fig. 1~Fig. 3, the present invention is the outer welding machine of a kind of soldering tip movable type, comprise steel pipe conveying roller 1 and the frame 2 that is parallel to steel pipe conveying roller 1 for horizontal positioned steel pipe, frame 2 is provided with can be along the welding tractor 3 of frame 2 horizontal slips, the welding arm 32 that lifting sliding rail 31 is installed on welding tractor 3 and can slides up and down along lifting sliding rail 31, the front end of welding arm 32 is provided with plumb joint 33, and the side that the front end of welding arm 32 is positioned at plumb joint 33 is also provided with ground wire device 34.
The outer welding machine of this soldering tip movable type is statically placed in steel pipe to be welded on steel pipe conveying roller 1, be connected to form loop by ground wire device 34 and steel pipe, control the position of plumb joint 33 by slip, the slip of welding arm 32 relative lifting sliding rails 31 and the slip of welding tractor 3 relative frames 2 of plumb joint 33 relative welding arms 32, thereby make steel pipe seam welding can reach higher precision, and effectively promote weldquality.
As the preferred embodiment of the present invention, steel pipe conveying roller 1 comprises some horizontal feed rollers 11 and is arranged at the rotating roller 12 between horizontal feed roller 11, each rotating roller 12 includes and is positioned at the rotation running roller 111 of steel pipe conveying roller 1 axis both sides and the reductor 112 that driven rotary running roller 111 rotates, and each horizontal feed roller 11 comprises some transport rollers 113 perpendicular to steel pipe conveying roller 1 axis and the reductor 112 that drives transport roller 113 to rotate.
As the preferred embodiment of the present invention, frame 2 is provided with twice tooth bar parallel to each other 21, the bottom of welding tractor 3 is provided with two and is provided with direction converter 42 and drives the output motor 4 that rotates of two gears 41 with tooth bar 21 41 of meshed gears 41, two gears respectively.
As the preferred embodiment of the present invention, welding tractor 3 is provided with wire reel 5 and flux restoring dust arrester 6.
As the preferred embodiment of the present invention, welding arm 32 is provided with can be along the tracking slide unit 35 of welding arm 32 planar slides, plumb joint 33 is fixed on to be followed the tracks of on slide unit 35, and plumb joint 33 places are provided with collects position while welding signal and feed back the sensor moving to control plumb joint 33.
Steel pipe is still on steel pipe conveying roller 1, and the plumb joint 33 on welding tractor 3 is implemented welding along the direction of frame 2.Frame 2 is arranged on base surface, and welding tractor 3 is connected in frame 2, along frame 2 lengthwise movements.Start output motor 4, drive the gear 41 of both sides to rotate by the direction converter of both sides, thereby gear 41 engages drive welding tractor 3 along frame 2 lengthwise movements with the tooth bar 21 in frame 2.
Wire reel 5 and flux restoring dust arrester 6 have been installed on welding tractor 3, welding arm 32 is connected on lifting sliding rail 31, follow the tracks of slide unit 35, welding wire guiding mechanism and ground wire device 34 and be installed in welding arm 32 relevant positions, plumb joint 33 is arranged on to be followed the tracks of on slide unit 35, utilizes the form that plumb joint 33 moves to carry out outside weld welding to static steel pipe to realize.
The actuating unit of welding tractor 3 provide power through under the transmission of gear 41 and tooth bar 21 in frame 2 steady and constant travel speed, in frame 2, adopt single-sided linear guideway, the structure of monolateral plate rail, make to play guide effect stably in welding process, the operation linear precision of welding tractor 3 is ensured.And the weight of each assembly on welding tractor 3 is relatively constant; the load that welding tractor 3 is subject to can not change because of the variation of caliber; make welding process more steady; because welding tractor 3 need to be walked in frame 2; drag and cause breakage for fear of cable, so select steel pull chain to lead and protective effect to cable.
Because welding tractor 3 moves in frame, therefore lifting sliding rail 31 must be connected on the car body of welding tractor 3, utilizes the slide position of adjustment lifting sliding rail 31 to adjust the lifting of welding arm 32, realizes the adjustment of welding pipe diameter size.
Welding arm 32 tops are provided with follows the tracks of slide unit 35, ground wire device 34 and welding wire guiding mechanism, plumb joint with welding line tracking function 33 is connected to and is followed the tracks of on slide unit 35, follow the tracks of slide unit 35 and be divided into horizontal slide unit and vertical slide unit two parts, in welding process, by the continuous detection of the sensor butt welded seam groove on plumb joint 33, the data message producing shows with figure after network analysis, feed back on the horizontal and vertical servomotor of following the tracks of slide unit 35, and carry out and move, realize outside weld is realized to accurate automatic tracking function, automaticity further improves.Welding wire guides to the tip of plumb joint 33 through welding wire guiding mechanism from wire reel by the traction of wire-feed motor, and when 34 times press contacts bodys of ground wire device, formation just can realize welding behind loop.On welding tractor 3, connect a set of flux restoring dust arrester 6; flux delivery on the plumb joint 33 consisting of four wire bond heads goes out solder flux; realized waste and old flux restoring dedusting by flux restoring dust arrester 6; such system has not only been improved worker's working environment, and the environment of equipment operation is had to remarkable protective effect.
This external welding has improved outside weld equipment precision and stationarity, and automaticity is high, provides good basis to the running environment of equipment, and its structure is also simply convenient to safeguard, and interchangeability is good.
Certainly, the invention is not limited to above-mentioned embodiment, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite without prejudice to spirit of the present invention, and the modification that these are equal to or replacement are all included in the application's claim limited range.