Plasma arc welding machine and method for machining ship accessories

Abstract

The invention belongs to the technical field of ship accessory machining, particularly relates to a plasma arc welding machine and method for ship accessory machining, and provides the following scheme for solving the problem that an existing plasma arc welding machine is poor in temperature stress treatment effect: the plasma arc welding machine for ship accessory machining comprises a bearing platform; the two mounting plates are arranged on the bearing platform, two symmetrical movable grooves are formed in the bearing platform, and the inner walls of the movable grooves are slidably connected with the outer portions of the mounting plates on the same sides; the four clamps are arranged between the two mounting plates, and the two clamps on the same side are symmetrical to each other; a first hydraulic rod is arranged on the upper side of the welding gun. According to the plasma arc welding machine and method for machining the ship accessories, heat of cooling liquid generated during welding of the welding gun can be recycled, the welded ship accessories are preheated, and therefore temperature stress generated during welding of the accessories is reduced, stress cracks generated after firmware welding are avoided, and the welding quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ship accessory processing, and in particular to a plasma arc welding machine and method for processing ship accessories. Background Art

[0002] Plasma arc welding refers to a fusion welding method that uses the high energy density beam of a plasma arc as a welding heat source. Plasma arc welding has the characteristics of concentrated energy, high productivity, fast welding speed, small stress and deformation, stable arc, and is suitable for welding thin plates and box materials. It is particularly suitable for welding various refractory, easily oxidized and heat-sensitive metal materials.

[0003] When existing plasma arc welding machines are used to weld ship accessories, due to the large temperature difference between the welding area and other parts of the accessory, large temperature stress will accumulate on the accessory after welding is completed, resulting in stress cracks at the welding position of the accessory after welding is completed, affecting the welding effect. Summary of the Invention

[0004] The invention discloses a plasma arc welding machine and method for processing ship accessories, aiming to solve the technical problem in the background art that the existing plasma arc welding machine has a poor effect in processing temperature stress.

[0005] The present invention provides a plasma arc welding machine for processing ship accessories, comprising a base; Mounting plates, wherein the two mounting plates are arranged on a support platform, and two symmetrical movable grooves are provided on the support platform, and the inner walls of the movable grooves are both slidably connected to the outer sides of the mounting plates on the same side; Clamps, wherein four of the clamps are arranged between two mounting plates, and the two clamps on the same side are symmetrical to each other; A welding gun, wherein a hydraulic rod 1 is provided on the upper side of the welding gun, a support frame is provided on the outside of the hydraulic rod 1, the support frame is fixedly connected to the side opposite to the base, and the output end of the hydraulic rod 1 is connected to the upper side of the welding gun; A waste heat recovery module is provided on the support frame and is located outside the welding gun. The waste heat recovery module is used to recover the heat of the coolant generated during welding by the welding gun and preheat the welded ship accessories, thereby reducing the temperature stress generated by the accessories during welding, avoiding stress cracks in the firmware after welding, and improving the welding quality.

[0006] In a preferred embodiment, a slot is provided on the support frame, and a slider is fixedly connected to the outside of the hydraulic rod one, and the outside of the slider is slidably connected to the inner wall of the slot, and the outside of the support frame is fixedly connected to a linear motor one, and the output end of the linear motor one is fixedly connected to the outside of the hydraulic rod one, and the outside of the support frame is fixedly connected to a heat collecting box, and a water supply pipe and a drainage pipe are provided on the outside of the heat collecting box, and the water supply pipe and the drainage pipe are connected to the welding gun at one end away from the heat collecting box, and a cooling groove is provided on the welding gun; the outside of the heat collecting box is fixedly connected to a pump machine one, and the output end of the pump machine one is connected to the water supply pipe through a conduit, and the bottom of the heat collecting box is provided with a cutout, and a heat conducting grille is fixedly connected in the cutout, and the outside of the heat conducting grille is slidably connected to the heat exchange box, and the outside of the heat exchange box is slidably connected to a guide frame, and the guide frame is fixedly connected to the side opposite to the support frame, and the outside of the support frame is fixedly connected to a hydraulic rod two, and the output end of the hydraulic rod two is fixedly connected to the bottom of the heat exchange box; the support frame is provided with a slot on the side away from the heat exchange box, and the slot The support plate is connected internally and slidingly, and a hydraulic rod three is fixedly connected to the upper side of the support plate, and the output end of the hydraulic rod three is fixedly connected to the bottom of the support plate, and the bottom of the support plate is fixedly connected to a linear motor two, and the output end of the linear motor two is fixedly connected to a movable frame, which is located on the outside of the support plate, and two symmetrical grooves are provided on the movable frame, and heat storage boxes are fixedly connected in the two grooves, and the same series pipe is provided between the two heat storage boxes, and heat diffusion plates are provided on the heat storage boxes; the upper sides of the two heat storage boxes are fixedly connected to a fixed frame, and an air inlet is provided on the outside of the fixed frame, and two symmetrical circular openings are provided on the upper side of the fixed frame, and exhaust fans are provided in the circular openings, and the two heat storage boxes are respectively fixedly connected with an infusion pipe and a drainage pipe, and the ends of the infusion pipe and the drainage pipe away from the heat storage box are connected to the heat exchange box, and the outside of the heat exchange box is fixedly connected to a pump two, and the output end of the pump two is connected to the infusion pipe through a thin tube, and a clamping and docking module is provided on the support, and the clamping and docking module is located on the outside of the welding gun.

[0007] In a preferred embodiment, the clamping and docking module includes a two-way screw rod, and the base is provided with two symmetrical circular holes, the inner walls of the circular holes are movably connected to the outside of the two-way screw rod, and the two mounting plates are provided with circular openings, the inner walls of the circular openings are rotatably connected to the outside of the two-way screw rod through external threads, the top inner wall of the base is fixedly connected to motor 1, the output end of motor 1 is connected to gear 1 through a coupling, the outside of the two-way screw rod is fixedly connected to gear 2, gear 2 is meshed with gear 1, and the two mounting plates are provided with openings, and circular shafts are movably connected in the openings; the outsides of the two mounting plates are fixedly connected to motor 2, the output ends of motor 2 are connected to one side of the circular shaft on the same side through a coupling, the side of the circular shaft away from motor 2 is fixedly connected to a fixed disk, and the outsides of the circular shafts are slidably connected to a rotating frame, the side of the rotating frame opposite to the fixed disk on the same side is movably connected, the outside of the rotating frame is fixedly connected to a gear ring, and the outside of the rotating frame is clamped with a locking The two wheels are connected in a sliding manner to the rack and the mounting plate are slidingly connected, and the bidirectional screw rod is fixedly connected to the side opposite to the locking rack on the same side; the two sliding parts are provided with two symmetrical springs, one end of the spring is fixedly connected to the outside of the sliding part, and the other end is fixedly connected to the outside of the mounting plate, and the fixed plate is provided with two symmetrical sliding grooves, and the sliding grooves are slidably connected to a rectangular block, one side of the rectangular block is fixedly connected to a short shaft, and the rotating frame is provided with two bidirectional screws equidistantly distributed on the circumference, the inner wall of the bidirectional screw is slidingly connected to the outside of the short shaft on the same side, and the other side of the rectangular block is fixedly connected to a connecting rod, the outside of the connecting rod is slidingly connected to the inner wall of the sliding groove, and the opposite sides of the two connecting rods on the same side are fixedly connected to the outside of the clamp; multiple clamps are provided with openings, the inner walls of the openings are movably connected to bidirectional screws, the outside of the bidirectional screws is provided with two symmetrical protrusions, and the protrusions are fixedly connected to the clamp. Rubber pads.

[0008] A plasma arc welding method for processing ship accessories, using the plasma arc welding machine for processing ship accessories as described above, comprises the following steps: Step 1: Use the clamping and docking modules to adjust according to the ship accessories to be welded so that the fixture can clamp the accessories and dock them to form a weld; Step 2: Use a welding gun to weld. During welding, use the waste heat recovery module to recover the heat of the coolant used to cool the welding gun and heat the accessories.

[0009] From the above, it can be seen that the plasma arc welding machine for ship accessories processing provided by the present invention can recover the heat of the coolant generated by the welding gun during welding and preheat the welded ship accessories, thereby reducing the temperature stress generated by the accessories during welding, avoiding stress cracks in the firmware after welding, and improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the overall structure of a plasma arc welding machine for processing ship accessories proposed by the present invention; Figure 2 This is a schematic cross-sectional view of a plasma arc welding machine for processing ship accessories proposed by the present invention; Figure 3 This is a schematic structural diagram of a waste heat recovery module of a plasma arc welding machine for processing ship accessories proposed by the present invention; Figure 4 This is a schematic diagram of the structure of a slider of a plasma arc welding machine for processing ship accessories proposed by the present invention; Figure 5 This is a schematic structural diagram of a heat exchange box of a plasma arc welding machine for processing ship accessories proposed by the present invention; Figure 6 This is a schematic diagram of the movable frame structure of a plasma arc welding machine for processing ship accessories proposed by the present invention; Figure 7 This is a schematic structural diagram of a clamping and docking module of a plasma arc welding machine for processing ship accessories proposed by the present invention; Figure 8 This is a schematic diagram of the mounting plate structure of a plasma arc welding machine for processing ship accessories proposed by the present invention; Figure 9 The present invention provides a schematic diagram of a fixture structure of a plasma arc welding machine for processing ship accessories.

[0011] Figure: 1. Base; 2. Movable slot; 3. Mounting plate; 4. Clamp; 5. Support frame; 6. Hydraulic rod 1; 7. Welding gun; 8. Waste heat recovery module; 801. Slider; 802. Linear motor 1; 803. Heat collector; 804. Pump 1; 805. Support plate; 806. Heat grid; 807. Water pipe; 808. Drain pipe; 809. Heat exchanger; 810. Guide frame; 811. Hydraulic rod 2; 812. Pump 2; 813. Hydraulic rod 3; 814. Movable frame; 815. Linear motor 2; 816. Heat storage box. 817. Heat sink; 818. Series pipe; 819. Infusion tube; 820. Drain pipe; 821. Fixed frame; 822. Exhaust fan; 9. Clamping and docking module; 901. Bidirectional screw; 902. Motor 1; 903. Gear 1; 904. Gear 2; 905. Fixed plate; 906. Motor 2; 907. Rotating frame; 908. Gear ring; 909. Locking rack; 910. Sliding part; 911. Spring; 912. Sliding groove; 913. Connecting rod; 914. Bidirectional screw; 915. Bump; 916. Rubber pad. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0013] The plasma arc welding machine for processing ship accessories disclosed in the present invention is mainly used in scenarios where the existing plasma arc welding machine has a poor effect in processing temperature stress.

[0014] Reference Figures 1-9 , a plasma arc welding machine for processing ship accessories, comprising a base 1; Mounting plates 3, two mounting plates 3 are arranged on the base 1, and two symmetrical movable grooves 2 are provided on the base 1, and the inner walls of the movable grooves 2 are slidably connected to the outer sides of the mounting plates 3 on the same side; Clamps 4, four clamps 4 are arranged between two mounting plates 3, and the two clamps 4 on the same side are symmetrical to each other; Welding gun 7, a hydraulic rod 6 is provided on the upper side of the welding gun 7, a support frame 5 is provided on the outside of the hydraulic rod 6, the support frame 5 is connected to the side opposite to the base 1 by bolts, and the output end of the hydraulic rod 6 is connected to the upper side of the welding gun 7; The waste heat recovery module 8 is arranged on the support frame 5 and is located outside the welding gun 7. The waste heat recovery module 8 is used to recover the heat of the coolant generated by the welding gun 7 during welding and preheat the welded ship accessories, thereby reducing the temperature stress generated by the accessories during welding, avoiding stress cracks in the firmware after welding, and improving the welding quality.

[0015] Specifically, according to the ship accessories that need to be welded, the clamping and docking module 9 is adjusted so that the clamp 4 can clamp and dock the accessories to form a weld, and the welding gun 7 is used for welding. During welding, the waste heat recovery module 8 is used to recover the heat of the coolant used to cool the welding gun 7 and heat the accessories; the device uses the waste heat recovery module 8 to recover the heat of the coolant generated by the welding gun 7 during welding, and preheat the welded ship accessories, thereby reducing the temperature stress generated by the accessories during welding, avoiding stress cracks after firmware welding, and improving welding quality.

[0016] Reference Figure 3 、 Figure 4 、 Figure 5 and Figure 6In a preferred embodiment, a notch is provided on the support frame 5, and a slider 801 is connected to the outside of the hydraulic rod 6 by bolts. The outside of the slider 801 is slidably connected to the inner wall of the notch. The outside of the support frame 5 is connected to the linear motor 802 by bolts. The output end of the linear motor 802 is connected to the outside of the hydraulic rod 6 by bolts, and the outside of the support frame 5 is connected to the heat collecting box 803 by bolts. The outside of the heat collecting box 803 is provided with a water pipe 807 and a drainage pipe 808. The ends of the water pipe 807 and the drainage pipe 808 away from the heat collecting box 803 are both connected to the welding gun 7, and the welding gun 7 is provided with a cooling groove; the outside of the heat collecting box 803 is connected to the cooling box 803. The pump 1 804 is connected by bolts, and the output end of the pump 1 804 is connected to the water pipe 807 through a conduit. A cutout is provided at the bottom of the heat collecting box 803, and a heat conducting grille 806 is connected to the heat exchange box 809 by bolts. The outside of the heat conducting grille 806 is slidably connected to the heat exchange box 809, and the outside of the heat exchange box 809 is slidably connected to the guide frame 810. The guide frame 810 is connected to the side opposite to the support frame 5 by bolts. The outside of the support frame 5 is connected to the hydraulic rod 2 811 by bolts, and the output end of the hydraulic rod 2 811 is connected to the bottom of the heat exchange box 809 by bolts; the support frame 5 is provided with a groove on the side away from the heat exchange box 809, and the groove is slidably connected to the guide frame 810. The supporting plate 805 and the upper side of the supporting platform 1 are connected to the hydraulic rod 3 813 by bolts, the output end of the hydraulic rod 3 813 is connected to the bottom of the supporting plate 805 by bolts, the bottom of the supporting plate 805 is connected to the linear motor 2 815 by bolts, the output end of the linear motor 2 815 is connected to the movable frame 814 by bolts, the movable frame 814 is located outside the supporting plate 805, and two symmetrical grooves are provided on the movable frame 814, the two grooves are connected to the heat storage box 816 by bolts, the same series pipe 818 is provided between the two heat storage boxes 816, and the heat storage boxes 816 are provided with a heat plate 817; the upper and lower ends of the two heat storage boxes 816 are connected to the upper and lower ends of the two heat storage boxes 816. The sides are connected with a fixed frame 821 by bolts, and an air inlet is provided on the outside of the fixed frame 821. Two symmetrical circular openings are provided on the upper side of the fixed frame 821, and an exhaust fan 822 is provided in the circular opening. The two heat storage boxes 816 are respectively connected with an infusion tube 819 and a drainage tube 820 by bolts. The ends of the infusion tube 819 and the drainage tube 820 away from the heat storage box 816 are connected to the heat exchange box 809. The outside of the heat exchange box 809 is connected with a pump 2 812 by bolts, and the output end of the pump 2 812 is connected to the infusion tube 819 through a thin tube. A clamping and docking module 9 is provided on the base 1, and the clamping and docking module 9 is located outside the welding gun 7.

[0017] Specifically, after the ship accessories to be welded are fixed, the welding gun 7 is started, and the pump 1 804 is started. The pump 1 804 transports the coolant in the heat collecting tank 803 into the welding gun 7 through the water pipe 807 and then transports it back to the heat collecting tank 803 from the drain pipe 808 to form a circulation, thereby transferring the heat generated by the welding gun 7 to the heat conducting grid 806. The hydraulic rod 2 811 is started, and the hydraulic rod 2 811 lifts the heat exchange box 809, so that the heat conducting grid 806 sinks into the heat conducting oil in the heat exchange box 809, causing the heat conducting oil to heat up rapidly. The pump 2 812 is started, Pump 2 812 delivers the heat transfer oil into the heat storage box 816 through the infusion pipe 819 and the series pipe 818, and returns it to the heat exchange box 809 through the discharge pipe 820, thereby transmitting the heat to the heat spreader 817. The exhaust fan 822 is started, and the exhaust fan 822 extracts the hot air and blows it toward the accessories, thereby preheating the accessories. The hydraulic rod 1 6 is started, and the output end of the hydraulic rod 6 lowers the welding gun 7 and starts welding. The linear motor 1 802 and the linear motor 2 815 are started, so that the movable frame 814 and the welding gun 7 can move synchronously on the weld.

[0018] In a specific application scenario, the waste heat recovery module 8 is mainly suitable for the waste heat recovery link in the preheating recovery process, that is, the waste heat recovery module 8 uses the heat collecting box 803 and the heat conducting grid 806 to quickly cool the welding gun 7 while recovering the heat, thereby heating the heat conducting oil in the heat exchange box 809, and using the heat storage box 816 and the heat spreader 817 to enable the exhaust fan 822 to efficiently and evenly release the waste heat to the ship accessories, thereby improving the temperature uniformity on the accessories, greatly delaying the generation of temperature stress, and improving welding efficiency.

[0019] Reference Figure 7 、 Figure 8 and Figure 9In a preferred embodiment, the clamping and docking module 9 includes a bidirectional screw 901. Two symmetrical circular holes are provided on the support platform 1. The inner walls of the circular holes are rotatably connected to the outer sides of the bidirectional screw 901 via bearings. Circular openings are provided on the two mounting plates 3. The inner walls of the circular openings are rotatably connected to the outer sides of the bidirectional screw 901 via external threads. The top inner wall of the support platform 1 is connected to a motor 1 902 via bolts. The output end of the motor 1 902 is connected to a gear 1 903 via a coupling. The outer side of the bidirectional screw 901 is connected to a gear 2 904 via bolts. The gear 2 904 meshes with the gear 1 903. And both mounting plates 3 are provided with holes, and round shafts are rotatably connected in the holes through bearings; the outsides of the two mounting plates 3 are connected to motor 2 906 through bolts, and the output ends of motor 2 906 are connected to one side of the round shaft on the same side through a coupling, and the side of the round shaft away from motor 2 906 is connected to a fixed disk 905 through bolts, and the outsides of the round shafts are slidably connected to a rotating frame 907, and the side of the rotating frame 907 opposite to the fixed disk 905 on the same side is rotatably connected through bearings, and the outsides of the rotating frame 907 are connected to a gear ring 908 through bolts, and the outsides of the rotating frame 907 are clamped with locking The rack 909 and the mounting plate 3 are both slidably connected with a sliding member 910, and the bidirectional screw rod 901 is connected to the opposite side of the locking rack 909 on the same side by bolts; two symmetrical springs 911 are provided on the two sliding members 910, one end of the spring 911 is connected to the outside of the sliding member 910 by bolts, and the other end is connected to the outside of the mounting plate 3 by bolts, and two symmetrical sliding grooves 912 are provided on the fixed plate 905, and rectangular blocks are slidably connected in the sliding grooves 912. A short shaft is connected to one side of the rectangular block by bolts, and two circumferentially equidistant points are provided on the rotating frame 907. The bidirectional screw 914 of the cloth, the inner wall of the bidirectional screw 914 is slidably connected to the outside of the short shaft on the same side, and the other side of the rectangular block is connected to the connecting rod 913 by bolts, the outside of the connecting rod 913 is slidably connected to the inner wall of the sliding groove 912, and the opposite sides of the two connecting rods 913 on the same side are connected to the outside of the clamp 4 by bolts; multiple clamps 4 are provided with openings, and the inner walls of the openings are rotatably connected to the bidirectional screw 914 through bearings, and the outside of the bidirectional screw 914 is provided with two symmetrical protrusions 915, and the protrusions 915 and the clamp 4 are connected to rubber pads 916 by bolts.

[0020] Specifically, the accessory is placed between the two clamps 4, the sliding member 910 is pulled to overcome the elastic force of the spring 911, so that the locking rack 909 releases the lock on the gear ring 908, and according to the edge shape of the accessory, the bidirectional screw 914 is rotated so that the protrusion 915 on the bidirectional screw 914 can be completely fitted with the accessory, and the rotating frame 907 is rotated so that the bidirectional screw 914 on the rotating frame 907 pushes the clamp 4 on the connecting rod 913 close to the accessory and makes the rubber pad 916 close to the surface of the accessory, and the sliding member 910 is released to reset the locking rack 909, and the locking rack 909 is re-engaged with the gear ring 908, and the rotating frame 907 no longer rotates, and the accessory is fixed on the clamp 4, and the motor 1 902 is started. The gear 1 903 on the motor 1 902 drives the gear 2 904 to rotate, so that the two mounting plates 3 on the bidirectional screw 901 are close to each other until the welding position of the accessory is fitted to form a weld.

[0021] In specific application scenarios, the clamping and docking module 9 is mainly suitable for the clamping and docking links in the clamping and docking process, that is, the clamping and docking module 9 uses the bidirectional screw 914 and the connecting rod 913 to enable the clamp 4 to move in a larger range, so that the device can have a better clamping effect on ship accessories of different sizes, and uses the position-adjustable protrusion 915 to enable the device to maintain stability when fixing accessories with irregular edges.

[0022] A plasma arc welding method for processing ship accessories, using the plasma arc welding machine for processing ship accessories as described above, comprises the following steps: Step 1: According to the ship accessories to be welded, use the clamping and docking module 9 to adjust so that the clamp 4 can clamp the accessories and dock them to form a weld (place the accessories between the two clamps 4, overcome the elastic force of the spring 911 to pull the sliding member 910, so that the locking rack 909 releases the lock on the gear ring 908, according to the edge shape of the accessories, rotate the bidirectional screw 914 so that the protrusion 915 on the bidirectional screw 914 can completely fit with the accessories, rotate the rotating frame 907 so that the bidirectional screw on the rotating frame 907 can be completely fitted with the accessories. 914 pushes the clamp 4 on the connecting rod 913 toward the accessory and causes the rubber pad 916 to fit tightly against the accessory surface. The sliding member 910 is released, causing the locking rack 909 to reset and re-engage with the gear ring 908. The rotating frame 907 stops rotating, and the accessory is fixed to the clamp 4. The motor 1 902 is started, and the gear 1 903 on the motor 1 902 drives the gear 2 904 to rotate, thereby bringing the two mounting plates 3 on the bidirectional screw 901 closer together until the welding position of the accessory is aligned to form a weld. Step 2: Use the welding gun 7 to weld. During welding, use the waste heat recovery module 8 to recover the heat of the coolant used to cool the welding gun 7 and heat the accessories (after the ship accessories to be welded are fixed, start the welding gun 7, start the pump 1 804, and the pump 1 804 will transport the coolant in the heat collection box 803 into the welding gun 7 through the water pipe 807 and then transport it back to the heat collection box 803 from the drain pipe 808 to form a circulation, thereby conducting the heat generated by the welding gun 7 to the heat transfer grid 806, start the hydraulic rod 2 811, and the hydraulic rod 2 811 will lift the heat exchange box 809, so that the heat transfer grid 806 sinks into the heat exchange box 809 The heat transfer oil in the heat exchanger 809 is quickly heated up, and the pump 2 812 is started. The pump 2 812 delivers the heat transfer oil into the heat storage box 816 through the infusion pipe 819 and the series pipe 818, and returns it to the heat exchange box 809 through the discharge pipe 820, thereby transmitting the heat to the heat spreader 817. The exhaust fan 822 is started. The exhaust fan 822 extracts the hot air and blows it to the accessories, thereby preheating the accessories. The hydraulic rod 6 is started. The output end of the hydraulic rod 6 lowers the welding gun 7 and starts welding. The linear motor 1 802 and the linear motor 2 815 are started so that the movable frame 814 and the welding gun 7 can move synchronously on the weld.

[0023] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A plasma arc welding machine for processing ship accessories, characterized in that: including abutment (1); Mounting plates (3), two mounting plates (3) are arranged on a support platform (1), and two symmetrical movable grooves (2) are provided on the support platform (1), and the inner walls of the movable grooves (2) are both slidably connected to the outer sides of the mounting plates (3) on the same side; Clamps (4), wherein four of the clamps (4) are arranged between two mounting plates (3), and two clamps (4) on the same side are symmetrical to each other; A welding gun (7), wherein a hydraulic rod (6) is provided on the upper side of the welding gun (7), a support frame (5) is provided outside the hydraulic rod (6), the support frame (5) is fixedly connected to the side opposite to the support platform (1), and the output end of the hydraulic rod (6) is connected to the upper side of the welding gun (7); A waste heat recovery module (8) is provided on the support frame (5) and is located outside the welding gun (7). The waste heat recovery module (8) is used to recover the heat of the coolant generated by the welding gun (7) during welding and to preheat the welded ship accessories, thereby reducing the temperature stress generated by the accessories during welding, avoiding stress cracks in the firmware after welding, and improving the welding quality.

2. A plasma arc welding machine for processing ship accessories according to claim 1, characterized in that: The support frame (5) is provided with a notch, the outside of the hydraulic rod (6) is fixedly connected to a slider (801), the outside of the slider (801) is slidably connected to the inner wall of the notch, the outside of the support frame (5) is fixedly connected to a linear motor (802), the output end of the linear motor (802) is fixedly connected to the outside of the hydraulic rod (6), and the outside of the support frame (5) is fixedly connected to a heat collecting box (803), the outside of the heat collecting box (803) is provided with a water pipe (807) and a drainage pipe (808), the ends of the water pipe (807) and the drainage pipe (808) away from the heat collecting box (803) are both connected to a welding gun (7), and a cooling groove is provided on the welding gun (7).

3. The plasma arc welding machine for processing ship accessories according to claim 2, characterized in that: The heat collecting box (803) is fixedly connected to a pump (804) on the outside, and the output end of the pump (804) is connected to a water pipe (807) through a conduit. A cutout is provided at the bottom of the heat collecting box (803), and a heat conducting grille (806) is fixedly connected in the cutout. The heat conducting grille (806) is slidably connected to a heat exchange box (809) on the outside, and the heat exchange box (809) is slidably connected to a guide frame (810) on the outside. The guide frame (810) is fixedly connected to the side opposite to the support frame (5). The support frame (5) is fixedly connected to a hydraulic rod (811) on the outside, and the output end of the hydraulic rod (811) is fixedly connected to the bottom of the heat exchange box (809).

4. The plasma arc welding machine for processing ship accessories according to claim 3, characterized in that: A groove is provided on a side of the support frame (5) away from the heat exchange box (809), and a support plate (805) is slidably connected in the groove. A hydraulic rod three (813) is fixedly connected to the upper side of the support platform (1), and the output end of the hydraulic rod three (813) is fixedly connected to the bottom of the support plate (805). The bottom of the support plate (805) is fixedly connected to a linear motor two (815), and the output end of the linear motor two (815) is fixedly connected to a movable frame (814). The movable frame (814) is located outside the support plate (805), and two symmetrical grooves are provided on the movable frame (814). Heat storage boxes (816) are fixedly connected in both grooves. The same series pipe (818) is provided between the two heat storage boxes (816), and a heat spreader (817) is provided on each heat storage box (816).

5. The plasma arc welding machine for processing ship accessories according to claim 4, characterized in that: The upper sides of the two heat storage boxes (816) are fixedly connected to a fixed frame (821), the outside of the fixed frame (821) is provided with an air inlet, the upper side of the fixed frame (821) is provided with two symmetrical circular openings, and the circular openings are provided with an exhaust fan (822), and the two heat storage boxes (816) are respectively fixedly connected to an infusion tube (819) and a drainage tube (820), and the ends of the infusion tube (819) and the drainage tube (820) away from the heat storage box (816) are connected to the heat exchange box (809), and the outside of the heat exchange box (809) is fixedly connected to a second pump (812), and the output end of the second pump (812) is connected to the infusion tube (819) through a thin tube. A clamping and docking module (9) is provided on the support platform (1), and the clamping and docking module (9) is located outside the welding gun (7).

6. The plasma arc welding machine for processing ship accessories according to claim 5, characterized in that: The clamping and docking module (9) includes a bidirectional screw (901), two symmetrical circular holes are provided on the support platform (1), the inner walls of the circular holes are movably connected to the outside of the bidirectional screw (901), and the two mounting plates (3) are provided with circular openings, the inner walls of the circular openings are rotatably connected to the outside of the bidirectional screw (901) through external threads, the top inner wall of the support platform (1) is fixedly connected to a motor 1 (902), the output end of the motor 1 (902) is connected to a gear 1 (903) through a coupling, the outside of the bidirectional screw (901) is fixedly connected to a gear 2 (904), the gear 2 (904) is meshed with the gear 1 (903), and the two mounting plates (3) are provided with openings, and a circular shaft is movably connected in the openings.

7. The plasma arc welding machine for processing ship accessories according to claim 6, characterized in that: The exteriors of the two mounting plates (3) are fixedly connected to motor 2 (906), the output ends of motor 2 (906) are connected to one side of the circular shaft on the same side via a coupling, the side of the circular shaft away from motor 2 (906) is fixedly connected to a fixed disk (905), and the exteriors of the circular shafts are slidably connected to a rotating frame (907), the rotating frame (907) is movably connected to the side opposite to the fixed disk (905) on the same side, the exteriors of the rotating frame (907) are fixedly connected to a gear ring (908), the exteriors of the rotating frame (907) are clamped with a locking rack (909), the mounting plates (3) are slidably connected to a sliding member (910), and the bidirectional screw rod (901) is fixedly connected to the side opposite to the locking rack (909) on the same side.

8. The plasma arc welding machine for processing ship accessories according to claim 7, characterized in that: Two symmetrical springs (911) are provided on the two sliding members (910), one end of the spring (911) is fixedly connected to the outside of the sliding member (910), and the other end is fixedly connected to the outside of the mounting plate (3). Two symmetrical sliding grooves (912) are provided on the fixed plate (905), and rectangular blocks are slidably connected in the sliding grooves (912), and a short shaft is fixedly connected to one side of the rectangular blocks. Two bidirectional screws (914) equidistantly distributed around the circumference are provided on the rotating frame (907), and the inner walls of the bidirectional screws (914) are slidably connected to the outside of the short shaft on the same side, and a connecting rod (913) is fixedly connected to the other side of the rectangular block, and the outside of the connecting rod (913) is slidably connected to the inner wall of the sliding groove (912). The opposite sides of the two connecting rods (913) on the same side are fixedly connected to the outside of the clamp (4).

9. The plasma arc welding machine for processing ship accessories according to claim 8, characterized in that: The plurality of clamps (4) are each provided with an opening, the inner walls of the openings being movably connected to a bidirectional screw (914), the exterior of each bidirectional screw (914) being provided with two symmetrical protrusions (915), and the protrusions (915) and the clamps (4) being fixedly connected to a rubber pad (916).

10. A plasma arc welding method for processing ship accessories, using the plasma arc welding machine for processing ship accessories according to claim 9, characterized in that: The steps include: Step 1: According to the ship accessories to be welded, the clamping and docking module (9) is adjusted so that the clamp (4) can clamp and dock the accessories to form a weld; Step 2: Use the welding gun (7) to perform welding. During welding, use the waste heat recovery module (8) to recover the heat of the coolant used to cool the welding gun (7) and heat the accessories.

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