Plasma arc welding equipment for assembling engineering machinery cab

Abstract

The invention discloses plasma arc welding equipment for engineering machinery cab assembly, and relates to the technical field of plasma arc welding equipment, the plasma arc welding equipment comprises a mounting straddle frame, an adjusting sliding groove is formed in the top of the mounting straddle frame, an adjusting sliding frame is slidably connected to the adjusting sliding groove, and a mounting plate is fixedly connected to the bottom of the adjusting sliding frame. According to the plasma arc welding equipment for engineering machinery cab assembly, in the welding process of a cross beam and a longitudinal beam, along with movement of a welding gun body, a third hydraulic cylinder is adjusted to drive a cooling frame to move to the periphery of a welding seam, so that a heat conduction bottom plate and a heat conduction contact rod make contact with the periphery of the welding seam; therefore, heat transfer at the weld joints is achieved through the heat conduction bottom plates and the heat conduction contact rods, the heat is guided into the cooling frames, the heat is absorbed through cooling liquid in the cooling frames, and distortion and deformation of the joints of the cross beams and the longitudinal beams caused by excessive heat at the weld joints are avoided; and the effect that the longitudinal beam and the cross beam cannot be smoothly assembled due to distortion after being welded is ensured.

Description

Technical Field

[0001] This invention relates to the field of plasma arc welding equipment technology, and in particular to a plasma arc welding equipment for assembling the cab of engineering machinery. Background Technology

[0002] Currently, welding is a key process in the manufacturing of engineering machinery cabs, and its quality directly affects the structural strength and safety performance of the cab. Among existing technologies, the manufacturing technology of metal cutting and welding equipment such as automatic and semi-automatic electric arc welding machines and plasma arc welding machines is relatively mature and widely used in the connection and forming of various metal structural parts.

[0003] When welding crossbeams and longitudinal beams, existing plasma arc welding equipment is prone to twisting deformation or dimensional shrinkage after welding due to the large number of welds, high heat input, and the inherent rigidity of the beam structure. This results in the cab being unable to accurately align with the mounting base on the chassis, rendering the plasma arc welding equipment unusable. Summary of the Invention

[0004] This invention discloses a plasma arc welding device for assembling the cab of engineering machinery, aiming to solve the technical problem that existing plasma arc welding devices, when welding crossbeams and longitudinal beams, are prone to twisting deformation or dimensional shrinkage after welding due to the large number of welds, high heat input, and the inherent rigidity of the beam structure. This results in the cab being unable to accurately align with the mounting base on the frame.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A plasma arc welding device for assembling an engineering machinery cab includes a mounting frame. The top of the mounting frame has an adjusting groove, and an adjusting slide is slidably connected to the adjusting groove. A mounting plate is fixedly connected to the bottom of the adjusting slide. The top of the mounting plate has a connecting ring groove, and two symmetrically distributed connecting sliders are slidably connected inside the connecting ring groove. Each connecting slider has a follower rod fixedly connected to its top, and each follower rod has a hanger fixedly connected to its top. Each hanger has a fixed plate fixedly connected to its bottom. A hydraulic cylinder is fixedly connected to the top of one of the fixed plates, and the output end of the hydraulic cylinder is equipped with a weld heat transfer mechanism. The weld heat transfer mechanism includes a cooling frame, which is fixedly connected to the output end of hydraulic cylinder three. Two symmetrically distributed telescopic connecting rods are fixedly connected to the top of the cooling frame. The tops of the two telescopic connecting rods are fixedly connected to the bottom of a fixed plate. A connecting hole is opened at the bottom of the cooling frame, and a heat-conducting base plate is fixedly connected inside the connecting hole. Heat-conducting contact rods are fixedly connected at equal intervals on the heat-conducting base plate. A liquid filling hole is opened at the top of the cooling frame, and a liquid filling pipe is fixedly connected inside the liquid filling hole. A pipe cap is screwed to the top of the liquid filling pipe, and a fixing hole is opened at the top of the pipe cap. A liquid level sensor is fixedly connected inside the fixing hole. An alarm is fixedly connected to the top of the cooling frame.

[0006] In a preferred embodiment, an adjustment rail is fixedly connected to the outer wall of the cooling frame, and a middle block is fixedly connected to the top of the adjustment rail at the middle position. Two symmetrically distributed reciprocating sliders are slidably connected inside the adjustment rail. A driving rod is fixedly connected to the top of each of the two reciprocating sliders. A hydraulic cylinder is hinged to the side of the middle block facing the two driving rods. The output end of the hydraulic cylinder is hinged to the side of the adjacent driving rod.

[0007] In a preferred embodiment, hydraulic cylinders are fixedly connected at equal intervals to the top of the reciprocating slider, and a striking ball is fixedly connected to the output end of each hydraulic cylinder. A track ring hole is opened on the outer wall of the cooling frame above the adjustment rail. A connecting rod is fixedly connected to the top of each of the two reciprocating sliders. The connecting rod passes through the track ring hole. A shaft frame is fixedly connected to the bottom end of the connecting rod. Rotating shafts are connected to the inner walls of both sides of the shaft frame through bearings. Rotating blades are fixedly connected at equal intervals to the outer wall of the rotating shaft.

[0008] In a preferred embodiment, the mounting plate has a connection hole at the top of the middle position, and a fixing ring frame is fixedly connected inside the connection hole. Multiple sets of positioning cylinders are fixedly connected to the inner side wall of the fixing ring frame. The output end of each set of positioning cylinders is fixedly connected to a positioning plate. The same welding torch body is clamped between the multiple positioning plates. An end frame is fixedly connected to the end of the mounting frame. An adjusting cylinder is fixedly connected to the side of the end frame facing the adjusting slide. The output end of the adjusting cylinder is fixedly connected to one side of the adjusting slide.

[0009] In a preferred embodiment, the bottom of the mounting plate has an annular groove, and a limiting ring rail is fixedly connected inside the annular groove. An annular rotating ring is slidably connected inside the limiting ring rail. A driven rotating tooth is fixedly connected to the outer wall of the annular rotating ring. Two external rods are fixedly connected to the outer wall of the annular rotating ring above the driven rotating tooth. The bottom of the driven rod is fixedly connected to the top of the adjacent external rod.

[0010] In a preferred embodiment, a motor frame is fixedly connected to the bottom of the mounting plate, and a forward and reverse motor is fixedly connected to the top of the motor frame. The output shaft of the forward and reverse motor is fixedly connected to a short shaft via a coupling. A driving gear is fixedly connected to the outer side wall of the short shaft, and the driving gear meshes with the driven gear.

[0011] In a preferred embodiment, a hydraulic cylinder four is fixedly connected to the top of another fixed plate, and a pre-treatment mechanism is provided at the output end of the hydraulic cylinder four. The pre-treatment mechanism includes a motor housing, which is fixedly connected to the output end of the hydraulic cylinder four.

[0012] In a preferred embodiment, two telescopic connecting rods are fixedly connected to the top of the motor housing, and the tops of the two telescopic connecting rods are fixedly connected to the bottom of the fixed plate. A grinding motor is fixedly connected inside the motor housing, and a grinding shaft is fixedly connected to the output shaft of the grinding motor through a coupling. A grinding stone is fixedly connected to the outer wall of the grinding shaft.

[0013] In a preferred embodiment, two tube racks are symmetrically distributed on the top of the motor housing, and the same collecting ring pipe is fixedly connected to the bottom of the two tube racks. The outer wall of the collecting ring pipe has a docking hole, and a hysteresis ring pipe is fixedly connected inside the docking hole. The hysteresis ring pipe and the collecting ring pipe are connected, and the outer walls of both the hysteresis ring pipe and the collecting ring pipe facing downward have collecting holes.

[0014] In a preferred embodiment, the tops of the two pipe racks are fixedly connected to the same placement platform, and the top of the placement platform is fixedly connected to a collection box. A collection pump is fixedly connected to the top of the placement platform near the collection box. The collection end of the collection pump is connected to the inside of the collection ring pipe through a pipe, and the delivery end of the collection pump is connected to the inside of the collection box through a pipe.

[0015] The present invention provides a plasma arc welding device for assembling the cab of engineering machinery. During the welding process of the crossbeam and longitudinal beam, as the welding torch body moves, the adjusting hydraulic cylinder moves the cooling frame to the periphery of the weld, so that the heat-conducting base plate and the heat-conducting contact rod come into contact with the weld. Thus, the heat at the weld is transferred through the heat-conducting base plate and the heat-conducting contact rod and guided into the cooling frame. The heat is absorbed by the coolant in the cooling frame, which avoids the twisting and deformation of the connection between the crossbeam and the longitudinal beam due to excessive heat at multiple welds. This ensures that the longitudinal beam and the crossbeam will not be unable to be assembled smoothly after welding due to twisting and deformation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a plasma arc welding equipment for assembling the cab of engineering machinery, as proposed in this invention.

[0017] Figure 2 for Figure 1 The overall structural main view.

[0018] Figure 3 This is an enlarged view of the combined structure of the welding torch body, weld heat transfer mechanism, and pretreatment mechanism of a plasma arc welding equipment for assembling an engineering machinery cab, as proposed in this invention.

[0019] Figure 4 This is a schematic diagram of the combined structure of the hanger and weld heat transfer mechanism of a plasma arc welding equipment for assembling an engineering machinery cab, as proposed in this invention.

[0020] Figure 5 This is a schematic diagram of the weld heat transfer mechanism of a plasma arc welding equipment for assembling the cab of engineering machinery, as proposed in this invention.

[0021] Figure 6 for Figure 5 Cross-sectional view of the central cooling frame structure.

[0022] Figure 7 This is a schematic diagram of the pretreatment mechanism of a plasma arc welding equipment for assembling the cab of engineering machinery, as proposed in this invention.

[0023] Figure 8 for Figure 7 A side view of the overall structure.

[0024] Figure 9 This is a schematic diagram of the combined structure of the welding torch body, fixed ring frame, adjusting slide, limiting ring rail, forward and reverse motor and mounting plate of a plasma arc welding equipment assembled in the cab of engineering machinery according to the present invention.

[0025] Figure 10 for Figure 9 A top view of the overall structure.

[0026] In the diagram: 1. Mounting frame; 2. Adjusting slide; 3. Adjusting slide; 4. Welding torch body; 5. Adjusting cylinder; 6. End frame; 7. Fixing ring frame; 8. Pretreatment mechanism; 801. Collection ring pipe; 802. Lag ring pipe; 803. Collection hole; 804. Pipe rack; 805. Collection box; 806. Placement platform; 807. Grinding stone; 808. Motor box; 809. Grinding motor; 810. Collection pump; 9. Weld heat transfer mechanism; 901. Cooling frame; 902. Adjusting rail; 903. Reciprocating slider; 904. Driving rod; 905. Track ring hole; 906. Intermediate block; 907. Liquid filling pipe; 908. Liquid level sensor; 909. Liquid... 910. Pressure cylinder 1; 911. Alarm; 912. Heat-conducting base plate; 913. Heat-conducting contact rod; 914. Hydraulic cylinder 2; 915. Striking ball; 916. Pipe cover; 917. Connecting rod; 918. Shaft bracket; 919. Rotating shaft; 910. Tilting blade; 10. Hanging rod; 11. Follower rod; 12. Fixing plate; 13. Hydraulic cylinder 3; 14. Telescopic connecting rod 1; 15. Telescopic connecting rod 2; 16. Mounting plate; 17. Hydraulic cylinder 4; 18. Active rotating gear; 19. Forward and reverse motor; 20. Motor frame; 21. Positioning plate; 22. Positioning cylinder; 23. Driven rotating gear; 24. External rod; 25. Limiting ring rail; 26. Connecting ring groove; 27. Connecting slider. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] The plasma arc welding equipment for assembling the cab of engineering machinery disclosed in this invention is mainly applied to the scenario where existing plasma arc welding equipment is used to weld the crossbeams and longitudinal beams. Due to the large number of welds and heat input in this part, and the high rigidity of the beam structure itself, the cab is prone to twisting deformation or dimensional shrinkage after welding, resulting in the cab being unable to be accurately aligned with the mounting seat on the frame.

[0029] Reference Figures 1-10A plasma arc welding device for assembling an engineering machinery cab includes a mounting frame 1. The top of the mounting frame 1 has an adjusting groove 2, and an adjusting slide 3 is slidably connected to the adjusting groove 2. A mounting plate 16 is fixedly connected to the bottom of the adjusting slide 3. A connecting ring groove 26 is formed on the top of the mounting plate 16. Two symmetrically distributed connecting sliders 27 are slidably connected inside the connecting ring groove 26. A follower rod 11 is fixedly connected to the top of each of the two connecting sliders 27. A lifting rod 10 is fixedly connected to the top of each of the two follower rods 11. A fixing plate 12 is fixedly connected to the bottom of each of the two lifting rods 10. A hydraulic cylinder 3 13 is fixedly connected to the top of one of the fixing plates 12, and the output end of the hydraulic cylinder 3 13 is equipped with a weld heat transfer mechanism 9. The weld heat transfer mechanism 9 includes... A cooling frame 901 is fixedly connected to the output end of hydraulic cylinder 13. Two symmetrically distributed telescopic connecting rods 14 are fixedly connected to the top of the cooling frame 901. The tops of the two telescopic connecting rods 14 are fixedly connected to the bottom of the fixing plate 12. A connecting hole is opened at the bottom of the cooling frame 901, and a heat-conducting base plate 911 is fixedly connected inside the connecting hole. Heat-conducting contact rods 912 are fixedly connected at equal intervals on the heat-conducting base plate 911. A liquid filling hole is opened at the top of the cooling frame 901, and a liquid filling pipe 907 is fixedly connected inside the liquid filling hole. A pipe cap 915 is screwed onto the top of the liquid filling pipe 907. A fixing hole is opened at the top of the pipe cap 915, and a liquid level sensor 908 is fixedly connected inside the fixing hole. An alarm 910 is fixedly connected to the top of the cooling frame 901.

[0030] In specific application scenarios, during the welding process of the crossbeam and the longitudinal beam, as the welding torch body 4 moves, the adjusting hydraulic cylinder 3 13 drives the cooling frame 901 to move to the periphery of the weld, so that the heat-conducting base plate 911 and the heat-conducting contact rod 912 come into contact with the weld. Thus, the heat at the weld is transferred through the heat-conducting base plate 911 and the heat-conducting contact rod 912 and introduced into the cooling frame 901. The heat is absorbed by the coolant in the cooling frame 901, avoiding the twisting and deformation of the connection between the crossbeam and the longitudinal beam due to excessive heat at multiple welds. This ensures that the longitudinal beam and the crossbeam will not be unable to be assembled smoothly due to twisting and deformation after welding.

[0031] Specifically, during the heat transfer process at the weld, the hydraulic cylinder 909 drives the reciprocating slider 903 to reciprocate. During its reciprocating motion, the hydraulic cylinder 913 continuously drives the striking ball 914 to gently tap the outer edge of the weld, thereby relieving stress.

[0032] It should be noted that during the reciprocating adjustment of the hydraulic cylinder 909, the reciprocating slider 903 drives the shaft frame 917 located inside the cooling frame 901 to move. During the movement of the shaft frame 917, the rotating blade 919 and the coolant interact and rotate, thereby driving the coolant inside the cooling frame 901 through the rotating blade 919, accelerating the flow of coolant, improving heat absorption efficiency, and improving the utilization rate of coolant inside the cooling frame 901.

[0033] Reference Figures 1-5 In a preferred embodiment, an adjusting rail 902 is fixedly connected to the outer wall of the cooling frame 901, and a middle block 906 is fixedly connected to the top of the adjusting rail 902 at the middle position. Two symmetrically distributed reciprocating sliders 903 are slidably connected inside the adjusting rail 902. A driving rod 904 is fixedly connected to the top of each of the two reciprocating sliders 903. A hydraulic cylinder 909 is hinged to the side of the middle block 906 facing the two driving rods 904. The output end of the hydraulic cylinder 909 is hinged to the side of the adjacent driving rod 904.

[0034] Reference Figure 5 and Figure 6 In a preferred embodiment, hydraulic cylinders 913 are fixedly connected at equal intervals to the top of the reciprocating slider 903, and each hydraulic cylinder 913 is fixedly connected to a striking ball 914 at its output end. The outer wall of the cooling frame 901 above the adjusting rail 902 has a track ring hole 905. The top of each of the two reciprocating sliders 903 is fixedly connected to a connecting rod 916, which passes through the track ring hole 905. The bottom end of the connecting rod 916 is fixedly connected to a shaft bracket 917. The inner walls on both sides of the shaft bracket 917 are connected to a rotating shaft 918 through bearings. The outer wall of the rotating shaft 918 is fixedly connected to a rotating blade 919 at equal intervals.

[0035] Reference Figure 1 , Figure 3 and Figure 9 In a preferred embodiment, the mounting plate 16 has a connection hole at the top of the middle position, and a fixing ring frame 7 is fixedly connected inside the connection hole. Multiple sets of positioning cylinders 22 are fixedly connected to the inner side wall of the fixing ring frame 7. The output end of each set of positioning cylinders 22 is fixedly connected to a positioning plate 21. The multiple positioning plates 21 clamp the same welding torch body 4. An end frame 6 is fixedly connected to the end of the mounting frame 1. An adjusting cylinder 5 is fixedly connected to the side of the end frame 6 facing the adjusting slide 3. The output end of the adjusting cylinder 5 is fixedly connected to one side of the adjusting slide 3.

[0036] Reference Figure 9 and Figure 10In a preferred embodiment, the bottom of the mounting plate 16 has an annular groove, and a limiting ring rail 25 is fixedly connected inside the annular groove. An annular rotating ring is slidably connected inside the limiting ring rail 25. A driven rotating tooth 23 is fixedly connected to the outer wall of the annular rotating ring. Two external rods 24 are fixedly connected to the outer wall of the annular rotating ring located above the driven rotating tooth 23. The bottom of the follower rod 11 is fixedly connected to the top of the adjacent external rod 24.

[0037] Reference Figure 9 and Figure 10 In a preferred embodiment, a motor frame 20 is fixedly connected to the bottom of the mounting plate 16, and a forward and reverse motor 19 is fixedly connected to the top of the motor frame 20. The output shaft of the forward and reverse motor 19 is fixedly connected to a short shaft via a coupling. An active rotating gear 18 is fixedly connected to the outer side wall of the short shaft, and the active rotating gear 18 meshes with the driven rotating gear 23.

[0038] Specifically, during the welding process, the forward and reverse motor 19 is started. The forward and reverse motor 19 drives the driven motor 23 to rotate through the active rotating gear 18, thereby driving the weld heat transfer mechanism 9 and the pretreatment mechanism 8 to adjust their angles through the follower rod 11, so that the weld heat transfer mechanism 9 and the pretreatment mechanism 8 are adjusted according to the welding angle of the welding torch body 4.

[0039] Reference Figure 1 , Figure 3 , Figure 7 and Figure 8 In a preferred embodiment, a hydraulic cylinder 17 is fixedly connected to the top of another fixed plate 12, and a pre-treatment mechanism 8 is provided at the output end of the hydraulic cylinder 17. The pre-treatment mechanism 8 includes a motor housing 808, which is fixedly connected to the output end of the hydraulic cylinder 17.

[0040] Specifically, during welding, before moving the welding torch body 4 to the designated position, the hydraulic cylinder 4 17 is adjusted to drive the grinding stone 807 to contact the welding position, and the grinding motor 809 is started. The grinding motor 809 drives the grinding stone 807 to grind the welding position, thereby thoroughly removing oil, rust and oxide scale (especially slag after laser cutting or plasma cutting) from the surface of the beam, preventing the formation of pores and slag inclusions.

[0041] It should be noted that during the rotation of the polishing stone 807, the collection pump 810 is activated. The collection pump 810 collects the waste generated during polishing through the collection hole 803 below the collection ring pipe 801, preventing secondary damage to the welding position. At the same time, as the polishing stone 807 is removed from the welding position, the collection hole 803 below the lagging ring pipe 802 collects the waste remaining below the original position of the polishing stone 807 again, improving the integrity of waste collection.

[0042] Reference Figure 7 and Figure 8 In a preferred embodiment, two telescopic connecting rods 15 are fixedly connected to the top of the motor housing 808, and the tops of the two telescopic connecting rods 15 are fixedly connected to the bottom of the fixing plate 12. A grinding motor 809 is fixedly connected inside the motor housing 808. The output shaft of the grinding motor 809 is fixedly connected to a grinding shaft through a coupling. A grinding stone 807 is fixedly connected to the outer wall of the grinding shaft.

[0043] Reference Figure 7 and Figure 8 In a preferred embodiment, two tube racks 804 are symmetrically distributed on the top of the motor housing 808, and the same collection ring pipe 801 is fixedly connected below the two tube racks 804. The outer wall of the collection ring pipe 801 has a docking hole, and a hysteresis ring pipe 802 is fixedly connected inside the docking hole. The hysteresis ring pipe 802 and the collection ring pipe 801 are connected. The outer walls of the hysteresis ring pipe 802 and the collection ring pipe 801 facing downwards both have collection holes 803.

[0044] Reference Figure 7 and Figure 8 In a preferred embodiment, the tops of the two pipe racks 804 are fixedly connected to the same placement platform 806, and the top of the placement platform 806 is fixedly connected to a collection box 805. The top of the placement platform 806 near the collection box 805 is fixedly connected to a collection pump 810. The collection end of the collection pump 810 is connected to the inside of the collection ring pipe 801 through a pipe, and the delivery end of the collection pump 810 is connected to the inside of the collection box 805 through a pipe.

[0045] Working principle: During use, the mounting frame 1 is installed around the welding positions of the crossbeams and longitudinal beams. The positions of the crossbeams and longitudinal beams are adjusted so that the welding torch body 4 is aligned with the welding position. Then, the hydraulic cylinder 17 is adjusted to drive the grinding stone 807 to contact the welding position. The grinding motor 809 is started, and the grinding motor 809 drives the grinding stone 807 to grind the welding position, thereby thoroughly removing oil, rust, and oxide scale from the surface of the beam. During the rotation of the grinding stone 807, the collection pump 810 is started. The collection pump 810 discharges the material through the collection hole 8 below the collection ring pipe 801. 03. Collect the waste generated during grinding to prevent secondary damage to the welding position. Simultaneously, as the grinding stone 807 is removed from the welding position, the collection hole 803 below the hysteresis ring pipe 802 collects the waste remaining below the original location of the grinding stone 807. After pretreatment, the adjusting cylinder 5 moves the welding torch body 4 to weld the pretreated position. After welding a single position, the adjusting cylinder 5 moves the welding torch body 4 again, and the adjusting hydraulic cylinder 13 moves the cooling frame 901 to the outer edge of the weld, allowing... The heat-conducting base plate 911 and the heat-conducting contact rod 912 come into contact with the area around the weld, thereby transferring heat from the weld to the cooling frame 901. The heat is then absorbed by the coolant in the cooling frame 901, preventing the connection between the crossbeam and the longitudinal beam from twisting and deforming due to excessive heat at the weld. During the heat transfer process at the weld, the hydraulic cylinder 909 drives the reciprocating slider 903 to reciprocate. During this reciprocating motion, the hydraulic cylinder 913 continuously drives the striking ball 914 to strike the weld. Slight tapping is applied to the outer perimeter to relieve stress. During the reciprocating adjustment of hydraulic cylinder 909, reciprocating slider 903 drives the shaft frame 917 located inside the cooling frame 901 to move. During the movement of shaft frame 917, the rotating blade 919 and the coolant interact and rotate, thereby driving the coolant inside the cooling frame 901 through the rotating blade 919, accelerating the flow of coolant, improving heat absorption efficiency, and accelerating the cooling of the weld. After the adjusting cylinder 5 drives the welding torch body 4 to complete the overall welding of the crossbeam and the longitudinal beam, the operation ends.

[0046] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A plasma arc welding device for assembling the cab of engineering machinery, comprising a mounting frame (1), characterized in that, The top of the mounting frame (1) has an adjusting groove (2), and an adjusting slide (3) is slidably connected to the adjusting groove (2). The bottom of the adjusting slide (3) is fixedly connected to a mounting plate (16). The top of the mounting plate (16) has a connecting ring groove (26). Inside the connecting ring groove (26), two symmetrically distributed connecting sliders (27) are slidably connected. The top of each of the two connecting sliders (27) is fixedly connected to a follower rod (11). The top of each of the two follower rods (11) is fixedly connected to a hanger rod (10). The bottom of each of the two hanger rods (10) is fixedly connected to a fixing plate (12). The top of one of the fixing plates (12) is fixedly connected to a hydraulic cylinder three (13), and the output end of the hydraulic cylinder three (13) is provided with a weld heat transfer mechanism (9). The weld heat transfer mechanism (9) includes a cooling frame (901), and the cooling frame is a cooling frame. The cooling frame (901) is fixedly connected to the output end of the hydraulic cylinder (13). Two symmetrically distributed telescopic connecting rods (14) are fixedly connected to the top of the cooling frame (901). The top of the two telescopic connecting rods (14) is fixedly connected to the bottom of the fixing plate (12). The bottom of the cooling frame (901) has a connecting hole, and a heat-conducting base plate (911) is fixedly connected inside the connecting hole. Heat-conducting contact rods (912) are fixedly connected at equal intervals on the heat-conducting base plate (911). The top of the cooling frame (901) has a liquid filling hole, and a liquid filling pipe (907) is fixedly connected inside the liquid filling hole. A pipe cap (915) is screwed onto the top of the liquid filling pipe (907). A fixing hole is opened on the top of the pipe cap (915), and a liquid level sensor (908) is fixedly connected inside the fixing hole. An alarm (910) is fixedly connected to the top of the cooling frame (901).

2. The plasma arc welding equipment for assembling the cab of engineering machinery according to claim 1, characterized in that, An adjustment rail (902) is fixedly connected to the outer wall of the cooling frame (901), and a middle block (906) is fixedly connected to the top of the adjustment rail (902) at the middle position. Two symmetrically distributed reciprocating sliders (903) are slidably connected inside the adjustment rail (902). A drive rod (904) is fixedly connected to the top of each of the two reciprocating sliders (903). A hydraulic cylinder (909) is hinged to the side of the middle block (906) facing the two drive rods (904). The output end of the hydraulic cylinder (909) is hinged to the side of the adjacent drive rod (904).

3. The plasma arc welding equipment for assembling the cab of engineering machinery according to claim 2, characterized in that, The top of the reciprocating slider (903) is fixedly connected with hydraulic cylinders two (913) at equal distances, and the output end of each hydraulic cylinder two (913) is fixedly connected with a striking ball (914). The outer wall of the cooling frame (901) above the adjustment rail (902) has a track ring hole (905). The top of the two reciprocating sliders (903) is fixedly connected with a connecting rod (916). The connecting rod (916) passes through the track ring hole (905). The bottom end of the connecting rod (916) is fixedly connected with a shaft frame (917). The inner walls on both sides of the shaft frame (917) are connected with rotating shafts (918) through bearings. The outer wall of the rotating shaft (918) is fixedly connected with rotating blades (919) at equal distances.

4. The plasma arc welding equipment for assembling the cab of engineering machinery according to claim 1, characterized in that, The mounting plate (16) has a connection hole at the top of the middle position, and a fixing ring frame (7) is fixedly connected inside the connection hole. Multiple sets of positioning cylinders (22) are fixedly connected to the inner side wall of the fixing ring frame (7). The output end of each set of positioning cylinders (22) is fixedly connected to a positioning plate (21). The multiple positioning plates (21) hold the same welding torch body (4). The end of the mounting frame (1) is fixedly connected to an end frame (6). An adjusting cylinder (5) is fixedly connected to the side of the end frame (6) facing the adjusting slide (3). The output end of the adjusting cylinder (5) is fixedly connected to one side of the adjusting slide (3).

5. The plasma arc welding equipment for assembling the cab of engineering machinery according to claim 4, characterized in that, The bottom of the mounting plate (16) has an annular groove, and a limiting ring rail (25) is fixedly connected inside the annular groove. An annular rotating ring is slidably connected inside the limiting ring rail (25). A driven rotating tooth (23) is fixedly connected to the outer wall of the annular rotating ring. Two external rods (24) are fixedly connected to the outer wall of the annular rotating ring located above the driven rotating tooth (23). The bottom of the follower rod (11) is fixedly connected to the top of the adjacent external rod (24).

6. The plasma arc welding equipment for assembling the cab of engineering machinery according to claim 5, characterized in that, The bottom of the mounting plate (16) is fixedly connected to a motor frame (20), and the top of the motor frame (20) is fixedly connected to a forward and reverse motor (19). The output shaft of the forward and reverse motor (19) is fixedly connected to a short shaft through a coupling. The outer side wall of the short shaft is fixedly connected to an active rotating tooth (18), which meshes with the driven rotating tooth (23).

7. The plasma arc welding equipment for assembling the cab of engineering machinery according to claim 1, characterized in that, Another fixed plate (12) is fixedly connected to the top of a hydraulic cylinder four (17), and the output end of the hydraulic cylinder four (17) is provided with a pre-treatment mechanism (8), which includes a motor box (808) and is fixedly connected to the output end of the hydraulic cylinder four (17).

8. The plasma arc welding equipment for assembling the cab of engineering machinery according to claim 7, characterized in that, The top of the motor housing (808) is fixedly connected to two telescopic connecting rods (15), and the tops of the two telescopic connecting rods (15) are fixedly connected to the bottom of the fixed plate (12). The inside of the motor housing (808) is fixedly connected to a grinding motor (809). The output shaft of the grinding motor (809) is fixedly connected to a grinding shaft through a coupling. The outer side wall of the grinding shaft is fixedly connected to a grinding stone (807).

9. The plasma arc welding equipment for assembling the cab of engineering machinery according to claim 8, characterized in that, The top of the motor housing (808) has two symmetrically distributed tube racks (804), and the same collecting ring pipe (801) is fixedly connected below the two tube racks (804). The outer wall of the collecting ring pipe (801) has a docking hole, and a hysteresis ring pipe (802) is fixedly connected inside the docking hole. The hysteresis ring pipe (802) and the collecting ring pipe (801) are connected. The outer walls of the hysteresis ring pipe (802) and the collecting ring pipe (801) facing downwards both have collecting holes (803).

10. The plasma arc welding equipment for assembling the cab of engineering machinery according to claim 9, characterized in that, The tops of the two tube racks (804) are fixedly connected to the same placement platform (806), and the top of the placement platform (806) is fixedly connected to a collection box (805). The top of the placement platform (806) near the collection box (805) is fixedly connected to a collection pump (810). The collection end of the collection pump (810) is connected to the inside of the collection ring pipe (801) through a pipe, and the delivery end of the collection pump (810) is connected to the inside of the collection box (805) through a pipe.

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