298 results about "Plasma arc welding" patented technology

The invention relates to the field of plasma arc welding, in particular to a plasma arc welding machine for high-performance material circular mechanical parts. Comprising a welding box assembly, a protection assembly capable of achieving buffering protection is installed on the inner wall of one side of the welding box assembly, and a machining assembly is installed on the welding box assembly; in the high-temperature welding process, dry ice blocks are driven to be rapidly gasified to absorb heat, damage to the structure by high temperature is avoided, the service life of equipment is prolonged, when faults or deviation occurs in the welding process, a second compression spring drives a sliding baffle to move to the position under the plasma arc welding structure after feeling that pressure disappears, and the welding quality is improved. And in the moving process of the fan steel plate, the fan steel plate on the clamping structure is driven to drive a sliding plate to slide in a sliding groove to extrude a first compression spring for buffering protection, so that the convenience of the welding position is improved, and meanwhile, the working effect of the plasma arc welding machine is improved.

The invention discloses a plasma arc welding device for producing a shell of a portable gas stove, and relates to the technical field of welding tools for the shell of the portable gas stove, the plasma arc welding device comprises a rack, a protection box mounted at the top of the rack and an image monitor mounted on the inner top surface of the protection box, and a rotary three-turn chuck is mounted on one side of the case; a first linear motor is mounted on the other side of the top of the rack, and a butt joint mechanism is mounted on the mounting seat; a feeding and discharging mechanism is mounted at the outer end of the herringbone rotating seat; a plasma arc welding mechanical arm is mounted on a moving seat of the second linear motor; the full-process automation of the to-be-welded assembly from feeding, grabbing to transferring is achieved; through cooperative clamping of the arc-shaped hoop plate and the arc-shaped clamping plate and cooperation with an anti-deviation structure of the anti-rotation arc strip and the anti-sliding groove, the stability of a to-be-welded part in the transferring process is ensured, and the positioning deviation risk caused by manual operation is greatly reduced; and through linkage adjustment of the electric push cylinder and the lifting assembly, the grabbing height and the transferring position of the shell of the portable gas stove of different specifications can be accurately adapted.

The invention discloses a coaxial powder feeding MIG wire powder composite additive manufacturing device and method, and belongs to the field of electric arc additive manufacturing. The device comprises an MIG wire powder composite welding gun for coaxial powder feeding; the composite welding gun comprises a wire powder coaxial copper nozzle with a wire feeding port in the middle, an ion gas shell and a powder feeding shell. Powder feeding ports are formed in the left end and the right end of the wire feeding port. The wire powder coaxial copper nozzle is located at the bottom end of the plasma arc welding gun and connected with the welding gun shell. A second channel between the ion gas shell and the powder feeding shell is used for feeding powder; the MIG electrode comprises a welding wire tube used for arranging a welding wire, and one end of the welding wire is sent out through a wire feeding port. A slotting sleeve is arranged on the outer side of a welding wire tube of an MIG electrode of the composite welding gun and located on the inner side of an ion gas shell. According to the device, the welding wire and the powder can synchronously enter the molten pool, so that the problem of component regulation and control in multi-component alloy additive manufacturing is effectively solved, and the utilization efficiency of the powder is improved.

The invention relates to the technical field of welding equipment, in particular to clamping equipment of a rake type drying assembly for a plasma arc welding machine and a working method thereof.The clamping equipment comprises a base, a conveying belt, a clamping assembly, a supporting seat and a rotary table, the upper end of the base is fixedly connected with a limiting frame, and the rotary table is rotationally connected into the limiting frame; the clamping assembly comprises a pair of concave clamping blocks, the concave clamping blocks are used for clamping the rake tooth rod, the outer ends of the concave clamping blocks are fixedly connected with nut pipes, the inner sides of the nut pipes are in threaded connection with first screws, the two ends of the concave clamping blocks are in sliding fit with guide frames, the first screws are rotationally connected with one ends of the guide frames, and the other ends of the first screws are in threaded connection with the guide frames. One end of the guide frame is fixedly connected with a rotating disc, and the concave clamping block is in sliding fit with the rotating disc; according to the automatic clamping device, the automatic clamping function is conveniently, rapidly and efficiently achieved.

The invention discloses a food detection metal block semi-automatic plasma arc welding machine, and particularly relates to the plasma arc welding production technology, the food detection metal block semi-automatic plasma arc welding machine comprises a first sliding frame, the upper end of the first sliding frame is fixedly connected with a blanking frame, a plurality of groups of second workpieces are arranged in the blanking frame, one side of the blanking frame is fixedly connected with a fixing plate, and the fixing plate is fixedly connected with a clamping plate; a motor is fixedly connected to the upper end of the fixing plate, a motor shaft is arranged at the lower end of the motor in an extending mode, a first gear is fixedly connected to the lower end of the motor shaft, a second gear is meshed with one side of the first gear, and a plasma arc welding gun is arranged in the second gear. The motor drives the first gear to rotate anticlockwise through the motor shaft, the first gear drives the second gear to rotate clockwise, and therefore the special-shaped rotating disc is driven to rotate clockwise, automatic blanking and assembling of the first workpiece and the second workpiece are completed along with clockwise rotation of the special-shaped rotating disc, and the first workpiece and the second workpiece are automatically welded.

The invention relates to the technical field of circular tube welding, in particular to a circular tube plasma arc welding device which comprises a bottom plate and further comprises a positioning mechanism, a welding mechanism, a polishing mechanism and an extraction mechanism, the positioning mechanism comprises two fixing frames and two electric clamping jaws, and the welding mechanism comprises a welding gun, a rotating ring, a rotating assembly and a moving assembly. The grinding mechanism comprises an L-shaped plate, a Z-shaped plate, a grinding block, a lifting assembly, a telescopic assembly and a transmission assembly, the extraction mechanism comprises an air draft fan blade, a storage assembly and a plurality of suction nozzles, the welding gun, a rotating ring, a rotating assembly and a moving assembly are arranged, the height of the welding gun can be adjusted through the moving assembly, the welding gun can be close to a round pipe needing to be welded, and the welding efficiency is improved. And meanwhile, the rotating assembly can drive the welding gun to rotate around the outer walls of the circular pipes, and plasma arc welding of the ends of the two circular pipes is achieved.

The invention provides a copper pipe welding machine, and particularly relates to the technical field of welding machines, the copper pipe welding machine comprises a welding table, a placing frame is fixedly arranged on one side of the top surface of the welding table, a plasma arc welding gun is connected to the placing frame in a clamped mode, and square blocks are slidably connected into four vertical grooves correspondingly; clamping blocks are fixedly arranged at the ends, away from the gear ring, of the four square blocks correspondingly, two copper pipes can be automatically clamped and fixed through the two fixed rings and the four clamping blocks arranged on the two fixed rings, so that the coaxiality and stability of the two copper pipes are guaranteed, stable welding of the two copper pipes is facilitated, the welding effect is improved, and the welding efficiency is improved. And in the process, manual clamping is not needed, automatic clamping can be achieved only by starting a small motor through a controller, so that the clamping convenience of the two copper pipes is improved, the moving distance of the four clamping blocks can be automatically adjusted through the rotating angle of an output shaft of the small motor, and the clamping efficiency is improved. And the copper pipe clamp is better suitable for clamping copper pipes with different sizes.

The invention relates to the technical field of plasma arc welding, in particular to a plasma arc welding machine for fan steel plate machining. Comprising a machining table, an electric sliding table used for transversely adjusting the welding position is fixedly connected to the machining table, and the output end of the electric sliding table is in transmission connection with a plasma generating mechanism used for welding the fan steel plate; the distance between the mounting block and the second annular block is monitored through a distance measuring infrared receiver and a distance measuring infrared transmitter, data are fed back to a controller, and the controller controls a third motor to adjust the distance between the mounting block and the second annular block. Therefore, the distance between the welding end of the plasma arc welding gun and the surface of the fan steel plate reaches a preset value, and through self-adaptive adjustment of the distance between the welding end of the plasma arc welding gun and the surface of the fan steel plate, the plasma arc welding gun can achieve the optimal welding effect when the fan steel plates with different thickness values are welded.

The in-situ measurement method for the depth and the width of the thick plate aluminum alloy perforation welding small hole molten pool is characterized by comprising the following steps: 1, image processing: preprocessing an obtained image, removing random splashing influence through combination of CLAHE and Gamma correction, improving the image quality, enhancing the edge characteristics of the molten pool and improving the welding quality detection accuracy; 2, deep learning: improving the accuracy and stability of small hole molten pool edge identification by improving the direction perception position code of SegFormer and introducing a time sequence information fusion mechanism; the method has the beneficial effects that in-situ real-time measurement of the depth and the width of the small-hole molten pool is realized through an image processing and deep learning fusion method according to the real-time detection requirement of key geometric feature changes of the small-hole molten pool in the variable polarity plasma arc welding perforation process of the thick plate aluminum alloy.

The invention relates to the field of prefabricated steel welding, in particular to a prefabricated steel structural part welding device which comprises a C-shaped supporting frame and a first hydraulic rod detachably installed on the outer side surface of the C-shaped supporting frame, a limiting sleeve is fixedly connected to the output end of the first hydraulic rod, and a protective gas hood is arranged on the inner side wall face of the limiting sleeve. A hydraulic pump is arranged in the protective gas hood, and a butt joint is fixedly connected to the output end of the hydraulic pump. When the plasma arc welding connector is replaced with a new plasma arc welding connector, the rhombic protruding strips on the outer side surface of the top end of the plasma arc welding connector are used for pushing and extruding the bottom surface of the clamping block towards the two sides, the butt joint groove in the top end of the plasma arc welding connector is connected to the outer side surface of the butt joint in a sleeving mode, and due to the fact that the butt joint groove and the rhombic protruding strips are tightly attached, the butt joint is not prone to deformation. Therefore, the plasma arc welding joint does not incline at excessive angles, and when the plasma arc welding joint slightly inclines, the friction force between the butt joint groove and the butt joint can be increased.

The invention discloses a method suitable for improving the structure uniformity of an AZ-series magnesium alloy manufactured through an electric arc additive. The method comprises the steps that firstly, a hot-rolled AZ31 plate is selected as a base plate; 2, performing three-dimensional modeling and slicing treatment according to a target magnesium alloy workpiece, and designing a deposition path; 3, preheating the substrate, adjusting the distance between the electrode and the substrate, and introducing protective gas; and fourthly, according to the deposition path, electric arc additive manufacturing is conducted in an inner layer rotating deposition mode, and the AZ series magnesium alloy workpiece is obtained. Plasma arc welding is used as a heat source, the preparation speed is high, heat input control is accurate, the arc stiffness is good, splashing is effectively reduced, and the workpiece formability is good; a rotary deposition mode is adopted, thermal circulation is effectively controlled, abnormal structure growth is avoided, meanwhile, the means of interlayer hammering deformation is assisted, a deposition interface is optimized, the obtained AZ series magnesium alloy workpiece is uniform in structure, fine in grain, few in defect and excellent in strength and plasticity, and the process is simple and easy to popularize.

The invention belongs to the technical field of metal welding equipment manufacturing, and particularly relates to a multifunctional welding table for metal products. The two supporting plates are symmetrically connected to the two ends of the workbench in a sliding mode through the sliding openings, and adjusting assemblies are arranged at the bottom ends of the supporting plates. The two groups of mounting mechanisms are respectively mounted on the supporting plate; when the metal product is manufactured, metal cutting and welding equipment such as an automatic and semi-automatic electric arc welding bar and a plasma arc welding bar is usually adopted for manufacturing, through the arrangement of the mounting mechanism, under the cooperation of a rack, a tooth column and an inner tooth ring, the rack drives a clamping column to contract when the rack contracts, the tubular metal product is clamped through the clamping column, and then the tubular metal product is clamped through the clamping column. The function of fixing the tubular metal product is realized; the rotating block drives the second lead screw to rotate, the lead screw drives the clamping plate on the upper portion to move downwards till the metal product is clamped, and therefore the function of fixing the sheet-shaped or plate-shaped metal product is achieved.

The soft plasma arc combined laser-MIG composite welding device comprises a mounting plate, a soft plasma arc welding gun, a laser welding gun head and an MIG welding gun are sequentially mounted on the mounting plate, and the soft plasma arc welding gun and the MIG welding gun can be horizontally, vertically and rotationally adjusted on the mounting plate; the soft plasma arc welding gun forms an upper end shielding gas channel, the upper end of the upper end shielding gas channel is connected with a shielding gas pipe connector, a lower end shielding gas channel, an annular shielding gas cavity and a round hole are formed in the gas nozzle, and the round hole vertically penetrates through the interior of the annular shielding gas cavity to the exterior of the gas nozzle. Compared with the prior art, through the synergistic effect of the soft plasma arc welding gun, the laser welding gun head and the MIG welding gun, the welding penetration depth is increased, the welding speed is increased, the occurrence of welding defects is reduced, and the welding quality is improved. And the welding quality and the welding efficiency are improved.

The utility model discloses a plasma arc welding tool which comprises an operation table, an argon filling strip and a base plate, and an inflation hole is formed in the operation table. The argon filling strip is installed on the top face of the operation table, an argon filling groove extending in the longitudinal direction is formed by the argon filling strip, an opening of the argon filling groove faces upwards to form a welded junction, and a first partition plate is arranged in the argon filling groove and divides the argon filling groove into an upper gas storage chamber and a lower gas inlet chamber. A vent hole for communicating the gas storage chamber with the gas inlet chamber is formed in the first partition plate, and a gas inlet hole communicated with the gas filling hole is formed in the bottom of the argon filling strip; the gas inlet hole is used for filling argon into the gas inlet chamber; the two base plates are both placed on the operation table and located on the two sides, in the transverse direction, of the argon filling strip correspondingly, and the two base plates are used for containing two to-be-welded parts correspondingly so that the two to-be-welded parts can be in butt joint at a welding opening. And the first partition plate plays a role in buffering argon filled into the gas inlet chamber, so that the argon is more uniformly distributed in the gas storage chamber, the protection effect of the argon on a welding seam is better, and the forming quality of the welding seam is ensured.

The application relates to the technical field of plasma arc welding, in particular to a plasma arc welding machine which comprises a machine table, an arrangement structure is arranged on the inner side of the machine table, a positioning structure is arranged on the top side of the arrangement structure, a lifting structure is arranged on the bottom side of the arrangement structure, a welding structure is arranged in the middle of the machine table, an adjusting structure is arranged on the inner side of the welding structure, and a bearing structure is arranged on the arrangement structure. The two parts to be welded can be synchronously rotated through the arrangement structure, good welding effect is obtained, the workpiece with a cylindrical structure can be stably and accurately fixed through the positioning structure, the height can be adjusted according to the specifications of the welding workpiece through the lifting structure, the welding work of the cylindrical workpiece can be quickly completed through the welding structure, the welding angle of the plasma welding gun can be adjusted through the adjusting structure, and the tubular or other special-shaped workpiece can be provided with good fixing effect through the bearing structure.

The invention provides a semi-automatic plasma arc welding workbench, and relates to the technical field of welding workbenches, the semi-automatic plasma arc welding workbench comprises a T-shaped groove workbench, a fixed matching sliding block is slidably mounted in a T-shaped groove of the T-shaped groove workbench, a notch is formed in the front side of the top end face of the fixed matching sliding block, and a columnar limiting groove is formed in the front side of the bottom face of the inner end of the notch; the axis part of the bottom surface of the inner end of the columnar limiting groove is provided with an insertion hole position penetrating through the bottom end surface of the fixed matching sliding block, and a film type pressure sensor is installed around the inner circumferential surface of the insertion hole position and adjacent to the bottom opening end part. According to the auxiliary monitoring structure based on the inserting column, the rubber round block and the film type pressure sensor, if the workpiece is collided by foreign objects in the clamping state and causes small displacement of the workpiece, early warning can be triggered synchronously, warning of the small displacement condition of the workpiece is achieved, and the working efficiency is improved. The technical problem that a plasma arc welding T-shaped groove workbench widely used in the current industrial manufacturing field cannot monitor the workpiece clamping state is solved.

The invention discloses a curtain wall aluminum plate local hot melting welding device, and belongs to the technical field of curtain wall welding, the curtain wall aluminum plate local hot melting welding device comprises a climbing mechanism used for climbing along a keel and crossing an embedded plate, and the climbing mechanism is provided with a carrying mechanism used for driving a curtain wall aluminum plate to move to a designated installation position and a welding mechanism used for welding the curtain wall aluminum plate on the keel; through the climbing mechanism and the crossing module, the device can actively clamp and climb along a vertical keel through the wheel pasting module like a wall climbing robot, and when obstacles such as embedded plates are encountered, the device can alternately retract and lift the crossing module step by step, and lossless crossing is achieved; by means of multi-degree-of-freedom coordinated movement, a curtain wall aluminum plate can be extremely accurately conveyed to a designated installation position in a three-dimensional space, meanwhile, a photoelectric detection module on the welding mechanism can automatically scan and accurately position a seam, and accurate welding of local hot melting welding is achieved in cooperation with a plasma welding gun and an angle-adjustable wire feeding pipe.

The invention discloses a color-coated sheet plasma arc welding device and a welding method thereof, and relates to the related technical field of welding, the color-coated sheet plasma arc welding device comprises a rack and supports fixed to the two sides of the rack, and further comprises sliding barrels fixed to the two sides of the rack through the supports, transmission rods are vertically installed in the two sliding barrels in a sliding mode, and the transmission rods are fixed to the two sides of the rack through the supports. Sliding rods are fixed to the tops and the bottoms of the two transmission rods correspondingly, a rectangular frame is formed through the two sliding rods and the two transmission rods, the two transmission rods are installed on the two sliding rods through translation assemblies, the two lifting plates are fixed to the opposite sides of the two sliding barrels correspondingly, and the two lifting plates are driven by driving sliding sleeves and lead screws to rotate synchronously. According to the embodiment, the plasma arc welding gun ascends and descends along with the protruding form of the color-coated plate body while the sliding rod is driven to horizontally move, and compared with a driving mode of multiple air cylinders or a motor air cylinder combination, the plasma arc welding gun driving device has the advantages of being simple in structure, low in production cost and debugging cost and stable in accuracy.

The invention discloses an excavator revolving platform plasma arc welding tool, which relates to the technical field of excavator part welding processing, and comprises a welding processing table, a mounting frame fixedly connected to the outer wall of the top of the welding processing table, a positioning table, an excavator revolving platform positioning structure, a rotating structure and a plasma arc welding structure, the rotating structure comprises a rotating shaft, a stepping motor fixedly installed on the outer wall of the bottom of the positioning table, a worm fixedly arranged on an output shaft of the stepping motor in a sleeving mode and a worm gear fixedly arranged on the rotating shaft in a sleeving mode. The excavator rotating platform positioning structure comprises a plurality of locking assemblies which are arranged on the positioning table and distributed in an annular mode. According to the welding tool, positioning can be conducted from multiple angles of the excavator rotating platform through the multiple annularly-distributed locking assemblies, and then the positioning range and the positioning effect of the welding tool can be effectively improved; according to the welding device, the welding angle of the positioned excavator rotating platform can be flexibly adjusted conveniently, and then the multi-angle comprehensive welding effect can be achieved.

The invention discloses plasma arc welding equipment for automobile part machining, and relates to the related technical field of automobile part machining, the plasma arc welding equipment comprises a workbench, and the workbench is provided with a mechanical arm used for controlling a welding gun to move and a clamping mechanism used for clamping a composition pipeline of an automobile exhaust pipe; the number of the clamping mechanisms arranged on the workbench is two, the two clamping mechanisms clamp the two welded pipelines respectively, and a driving mechanism is further arranged on the workbench. When two sections of pipelines are welded, the two clamping mechanisms are driven by the driving mechanism to have the following strokes: a first stroke, the two clamping mechanisms respectively clamp and fix the two sections of pipelines; in the second stroke, the two clamping mechanisms get close to each other to drive the two ends, needing to be welded, of the two sections of pipelines to be in butt joint; and in the third stroke, the two sections of pipelines are driven to circumferentially rotate so as to assist the welding gun in welding operation.

The plasma arc welding machine comprises a bottom plate, linear motors are fixedly mounted on the two sides of the middle of the top end of the bottom plate correspondingly, the driving ends of the linear motors are fixedly connected with movable plates correspondingly, and the centers of the top ends of the movable plates are fixedly connected with one ends of hydraulic cylinders correspondingly; the other end of each hydraulic cylinder is fixedly connected with the middle of a connecting rod, the two ends of each connecting rod are fixedly connected with clamping assemblies respectively, the clamping assemblies are symmetrically arranged on the two sides of a placing plate respectively, and the placing plate is arranged at the top of the bottom plate; gantry sliding tables are fixedly installed at the two ends of the top of the bottom plate, angle adjusting mechanisms are fixedly connected to the driving ends of the gantry sliding tables, and plasma welding guns are fixedly connected to the bottom ends of the angle adjusting mechanisms. The placing plate is used for placing the semitrailer frame girder, the frame girder is positioned, clamped and fixed through the clamping assembly, the stability in the welding process is ensured, and the welding defect caused by workpiece movement is effectively avoided; and the clamping assembly is ingenious in design.

The invention discloses a passenger car front passenger door lower cross beam welding positioning tool which comprises a lower cross beam welding table, and a supporting frame and a sliding base capable of moving along a sliding groove are arranged on the lower cross beam welding table. The plasma welding assembly comprises a plasma welding controller, a plasma arc welding connector, an electric telescopic rod and a mechanical hand, wherein the plasma welding controller is installed on the sliding base, and the electric telescopic rod drives the welding connector to move. The profiling positioning device consists of a profiling reference block and a transmission double-screw rod; the embedded water cooling device comprises a spiral water cooling channel embedded in the profiling reference block; through the synergistic effect of the snakelike groove of the profiling reference block and the transmission double screws, the profile of the special-shaped curved surface of the lower cross beam of the passenger car is accurately matched, and the problem that a workpiece is suspended or stressed unevenly is solved; the dynamic pressure adjusting mechanism detects and adjusts the contact pressure of the pressing ball in real time, it is guaranteed that clamping force is evenly distributed, the defects of misalignment, undercut and the like of weld joints are avoided, and the welding qualification rate is increased.

The invention provides a steel pipe welding device for house building, which relates to the field of welding equipment and comprises a welding machine main body, a clamping carriage, a plasma arc welding gun, a welding monitoring part, a welding auxiliary mechanism and a monitoring execution mechanism, the clamping sliding frames are connected to the upper portion of the welding machine body in a sliding mode. The welding bearing frame is arranged in the middle of the upper portion of the welding machine body. The welding mounting frame is fixedly connected to the rear portion of the welding bearing frame. The plasma arc welding gun is arranged on the inner side of the welding mounting frame; the welding monitoring pieces are fixedly connected to the outer sides of the clamping sliding frames correspondingly. The welding alarm part is fixedly connected to the upper portion of the welding machine body. The welding auxiliary mechanism is arranged above the welding machine main body; the monitoring executing mechanism is arranged at the front end of the upper portion of the welding machine body, the quality and stability of a welding seam are effectively improved, and the problem that the welding quality of a steel pipe is affected due to the fact that periodic impact loads generated during operation of a large machine are conducted to a welding device through the ground is solved.

The invention relates to the technical field of cold-roll steel sheet welding, in particular to plasma arc automatic welding equipment for cold-roll steel sheet machining, which comprises a rack, a moving unit connected to the rack and the like, a plurality of first electric push rods are fixedly connected to the bearing plate; the telescopic ends of the first electric push rods are jointly and fixedly connected with a first mounting plate. A base plate is connected to the first mounting plate and located under the plasma arc welding gun, an arc-shaped groove is formed in the base plate, and the base plate is located in a through groove in the middle of the bearing plate. A plurality of second electric push rods are fixedly connected to the front side and the rear side of the rack correspondingly; the telescopic ends of the second electric push rods located on the same side are jointly and fixedly connected with a second mounting plate, and the two second mounting plates are symmetrically arranged front and back. Through the synergistic effect of all the parts, automatic alignment and welding of the joints of the cold-roll steel sheet cylinder are achieved.

The invention relates to the technical field of plasma arc welding, and particularly discloses a building steel structure node plasma arc welding machine which comprises a base, a welding head is arranged on at least one side of the base, and the welding head is aligned to a to-be-welded point of a cross beam and a to-be-welded point of a vertical beam; the welding head is in sliding connection with the base through the sliding rail assembly, and when the base and the cross beam are relatively fixed, the welding head slides relative to the cross beam through the sliding rail assembly, so that the welding head covers the welding path of the cross beam and the vertical beam; the base is arranged on the outer wall of the cross beam from the upper portion of the cross beam in a sleeving mode during installation, and locking blocks are arranged at the two ends of the base and can be inserted into grooves in the two ends of the cross beam. By arranging the sliding rail assembly and the movable welding head, all-directional covering welding of a complex steel structure joint is achieved, the welding head can slide bidirectionally along the cross beam, continuous welding can be completed without frequently adjusting the position of the base, the welding efficiency is remarkably improved, and the welding cost is reduced. The method is particularly suitable for batch welding operation of cross joints of cross beams and vertical beams in building steel structures.

The invention belongs to the field of welding devices, and particularly relates to a steel formwork longitudinal and transverse rib welding device which comprises a welding table, and a formwork body is arranged at the top of the welding table; a plurality of transverse ribs and longitudinal ribs are arranged in the template body; a welding assembly is arranged at the top of the welding table; the welding assembly comprises a mechanical arm and a plasma arc welding machine for welding the template body; through the cooperation effect of a steel cable and an inserting block, after a clamping plate extrudes a formwork body, the steel cable can release the fixing state of the inserting block to a connecting rod, so that follow-up adjustment of the connecting rod to an equal-distance adjusting assembly is started, the device has continuity when used, equipment needed during welding is reduced, meanwhile, through the arrangement of the equal-distance adjusting assembly, the welding efficiency is improved, and the welding quality is improved. The positioning and guiding functions can be achieved during installation of the transverse ribs and the longitudinal ribs, the accuracy of the positions of the transverse ribs and the longitudinal ribs during welding of the formwork body is improved, and the workload needed by multiple times of measurement during installation of the transverse ribs and the longitudinal ribs is reduced.

The invention discloses a semi-automatic plasma arc welding machine for asphalt construction protection parts, and particularly relates to the technical field of metal welding, the semi-automatic plasma arc welding machine comprises a mounting back plate, the upper end of the mounting back plate is fixedly connected with a top plate, the lower end of the top plate is fixedly connected with two groups of air cylinders, and the lower end of each group of air cylinders is provided with a telescopic rod in an extending manner; a lifting plate is fixedly connected to the lower ends of the two sets of telescopic rods, two sets of special-shaped rods are fixedly connected to the lower end of the lifting plate, a rail frame is fixedly connected to the front side of the mounting back plate, and two sets of clamping blocks are slidably connected to the rail frame in a buckled mode; according to the device, the air cylinder can drive the lifting plate to descend through the telescopic rod, so that the special-shaped rod drives the clamping blocks to get close to press a second workpiece and a third workpiece, the second workpiece and the third workpiece are pressed into the first workpiece, and when the telescopic rod drives the lifting plate to ascend, the plasma arc welding gun welds the second workpiece and the third workpiece; and welding assembly of the first workpiece, the second workpiece and the third workpiece is completed.

The invention is suitable for the technical field of welding, and provides a steel bar part positioning and welding device which comprises a positioning assembly, and two symmetrical steel bar parts are arranged in the positioning assembly in a sliding and sleeved mode, and is characterized in that a welding assembly is rotationally matched with the positioning assembly, and the positioning assembly comprises a positioning part; according to the plasma arc welding device, the problems that in the plasma arc welding process of an existing reinforcing steel bar part, in the building construction process, due to the fact that the reinforcing steel bar part is of a cylindrical structure, in the traditional welding process, the whole reinforcing steel bar part is of a cylindrical structure, the welding efficiency is greatly improved, and the welding quality of the reinforcing steel bar part is greatly improved are solved. In the prior art, centering clamping and righting operation needs to be conducted on two reinforcing steel bar parts needing to be welded manually or through other external tools mostly, so that preparation work before welding is too complex, shaking is likely to happen in the welding process, the linearity of the welded reinforcing steel bar parts is poor, deviation occurs, and the welding quality is poor. And the later plasma arc welding process and result are affected.

The invention relates to the technical field of plasma arc welding, and discloses a plasma welding tool for automobile part production, which comprises a rack, and a welding assembly is arranged at the top end of the rack. According to the plasma welding tool for automobile part production, by arranging the welding assembly, when a first hydraulic cylinder is started, a plasma welding head is made to be close to a weld joint on a circular workpiece body at the center of a circular ring plate, and an asynchronous motor, a driving gear, a fixing frame, the circular ring plate and a driven gear ring are matched to synchronously and stably rotate in multiple sets of limiting wheels; when the support is kept horizontal and is located outside the top end of the annular plate, a first asynchronous motor is started to enable a one-way threaded rod to rotate, and then the support is driven to rotate synchronously, and after the plasma welding head is started, the plasma welding head is matched with revolution of the plasma welding head to better weld a circular weld joint; and the movable column drives the plasma welding head to transversely move to weld a horizontal welding seam on the square workpiece body, so that the adaptability and the efficiency of the tool body can be improved.

The invention relates to the technical field of pipeline welding, in particular to a stainless steel square pipe plasma arc welding device which comprises a base and further comprises a supporting mechanism, a welding mechanism and a clamping mechanism. The stainless steel square tube plasma arc welding device comprises a base, a welding mechanism and a clamping mechanism, the welding mechanism comprises a double-shaft air cylinder, a welding gun and an angle adjusting assembly, a base table is fixedly arranged at the top of the base, and the clamping mechanism is arranged at the top of the base table and comprises a sliding assembly, a lifting assembly, a rotating assembly, a centering assembly and two clamping plates. And by supporting the interiors of the two square pipes and clamping and limiting the exteriors of the two square pipes, the problem of welding deformation under the action of contraction force and thermal stress of a welding seam can be prevented, and then the plasma arc welding quality is improved.