Steel plasma cutting device for metal product machining

Abstract

The invention relates to the technical field of metal product machining, and discloses a steel plasma cutting device for metal product machining, which comprises a threaded horizontal moving mechanism and a hydraulic angle adjusting mechanism. According to the steel plasma cutting device for metal product machining, after steel is installed, directional movement of the steel can be achieved, so that the effect of cutting the steel at different positions is facilitated, in addition, after the steel is fixed, the function of adjusting the cutting angle of the steel can be achieved, and the steel plasma cutting device is convenient to use. Therefore, the needed cutting angle can be automatically adjusted according to the actual situation, and the cutting angle range of the plasma laser cutter is widened.

Description

Technical Field

[0001] The present invention relates to the technical field of metal product processing, and particularly to a plasma cutting device for metal products processing using steel. Background Art

[0002] At present, China is vigorously promoting the application of laser cutting. Laser cutting uses a highly focused high-power density laser beam to irradiate the workpiece, causing the irradiated material to quickly melt, vaporize, ablate or reach the ignition point. At the same time, the molten material is blown away by a high-speed gas flow coaxial with the beam, thereby realizing the cutting of the workpiece. Laser cutting belongs to one of the thermal cutting methods and is widely used in the field of steel cutting, featuring a burr-free cutting surface and high precision.

[0003] For example, the Chinese patent with the publication number "CN119549851A" discloses "a plasma cutting device for construction steel". Its main structure includes a base, the top of the base is fixedly connected with an L-shaped support plate, a plasma laser cutter is assembled on the L-shaped support plate, a feeding component is assembled on the top of the base, a steel clamping component is assembled on the upper surface of the base, a slag recovery groove is opened on the upper surface of the base. The feeding component includes a support rod, a support plate, and a support board. The support rod is fixed on the upper surface of the base, a steel placement plate is fixed at the top of the support rod, the support board is fixedly connected to the top of the base, a motor is embedded inside the support board, and the output shaft of the motor is fixedly connected with a rotating rod. This plasma cutting device for construction steel improves work efficiency by setting a turntable, support blocks, annular support blocks, fixing plates, three-way hydraulic chambers, hydraulic rod one, hydraulic rod two, teeth, spring two, annular toothed ring, and clamps.

[0004] However, when the above-mentioned plasma cutting device for construction steel actually works, the steel to be cut is fixed inside the turntable, and its fixed position cannot be adjusted after a single fixation. When it is necessary to cut another part of the steel, the steel needs to be reinstalled, which is time-consuming and laborious. At the same time, the steel is installed inside the turntable at a fixed angle, resulting in a fixed cutting angle between the steel and the plasma laser cutter, which causes the cutting angle range of the plasma laser cutter to be very narrow. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a plasma cutting device for metal products processing using steel, which can achieve the directional movement of the steel after the steel is installed, thereby facilitating the cutting effect of the steel at different positions. In addition, the device can achieve the cutting angle adjustment function of the steel after the steel is fixed, so as to be able to independently adjust the required cutting angle according to the actual situation to expand the cutting angle range of the plasma laser cutter, and solve the above technical problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a steel plasma cutting device for processing metal products, comprising a workbench with longitudinal support legs installed at the bottom, a limiting slide groove arranged in the workbench and with upper and lower end surfaces both in an open state, and a plasma laser cutter fixedly installed on one side of the limiting slide groove, and also comprising a threaded horizontal moving mechanism, wherein a horizontal threaded rod installed directly below the limiting slide groove through a bearing and capable of rotating, a hand-cranked wheel capable of driving the horizontal threaded rod to rotate, and a hand-cranked wheel capable of directional horizontal movement along the limiting slide groove when the horizontal threaded rod rotates are arranged inside. A movable base; and a hydraulic angle adjustment mechanism, which is provided with a cylindrical hollow shell that can move with the movable base and is hollow inside, a hemispherical shell that is arranged on the top of the cylindrical hollow shell and has a rotating ball head installed inside, a fan-shaped brake membrane that is embedded in the bottom of the hemispherical shell and can achieve a resistance braking effect on the hemispherical shell, a No. 1 coil spring that is placed inside the cylindrical hollow shell and exerts an upward elastic force, and a piston plate that is placed inside the cylindrical hollow shell and can transmit the elastic force of the No. 1 coil spring to the bottom surface of the fan-shaped brake membrane in a hydraulic form.

[0007] Preferably, the threaded horizontal moving mechanism also includes two fixed bases fixedly mounted on the bottom surface of the worktable, each of the fixed bases is provided with an axis mounting hole with open ends, and a rotatable rotating shaft is installed inside each of the axis mounting holes through a bearing, a hand-cranked wheel is fixedly mounted on the end of one of the rotating shafts, and a horizontal threaded rod is fixedly mounted on the opposite ends of the two rotating shafts through a coupling, an internal threaded hole is provided on the movable base which is installed on the rod body of the horizontal threaded rod through a threaded structure, limiting slots which are clamped in the limiting slide grooves are provided on both sides of the movable base, and a No. 1 docking plate which is an integral structure with the movable base is provided on the top of the movable base.

[0008] Preferably, the threaded structure includes an internal threaded structure arranged in the internal threaded hole and an external threaded structure arranged on the rod body of the horizontal threaded rod, and the internal threaded structure matches the external threaded structure.

[0009] Preferably, the axis center line of the horizontal threaded rod is located directly below the center line of the limiting slide groove, and the axis center line of the horizontal threaded rod and the center line of the limiting slide groove are balanced with each other.

[0010] Preferably, the hydraulic angle adjustment mechanism further includes a second docking plate. The bottom of the cylindrical hollow housing is provided with a second docking plate that is integrally structured with it and fixedly installed at the top of the first docking plate. The top of the cylindrical hollow housing is provided with a hemispherical housing that is integrally structured with it. The interior of the cylindrical hollow housing is provided with a longitudinal component activity cavity. The cylindrical hollow housing is provided with a liquid limit flow cavity at the top of the longitudinal component activity cavity. The hemispherical housing is provided with a sector-shaped liquid reserve cavity at the top of the liquid limit flow cavity. The interior of the hemispherical housing is provided with a hemispherical cavity with an open top that communicates with the sector-shaped liquid reserve cavity. The cylindrical hollow housing is hermetically embedded with a sector-shaped braking film at the intersection of the hemispherical cavity and the sector-shaped liquid reserve cavity. The interior of the hemispherical housing is provided with a rotatable rotating ball head. The top of the rotating ball head is provided with a third docking plate that is integrally structured with it. The outer circumferential surface of the cylindrical hollow housing is provided with a liquid compensation channel that communicates with the external space and the side of the liquid limit flow cavity and is internally equipped with a liquid valve. The interior of the cylindrical hollow housing is provided with a piston plate that can move axially along the longitudinal component activity cavity. The bottom space of the piston plate is installed with a first helical spring in a compressed state.

[0011] Preferably, the structural radius of the liquid limit flow cavity is smaller than the structural radius of the longitudinal component activity cavity.

[0012] Preferably, the structural radius of the rotating ball head matches the structural radius of the hemispherical cavity, and the depth of the hemispherical cavity is greater than the structural radius of the rotating ball head and less than the structural diameter of the rotating ball head.

[0013] Preferably, it further includes an elastic clamping mechanism, which internally includes a lower clamping plate and an upper clamping plate that are fixedly installed at the top of the third docking plate and can clamp steel, a longitudinal limiting rod that can cause the lower clamping plate and the upper clamping plate to move longitudinally relative to each other, and a second helical spring that generates an elastic clamping force between the lower clamping plate and the upper clamping plate.

[0014] Preferably, the elastic clamping mechanism further includes a lower clamping table and an upper clamping table. A fourth docking plate, which has an integrated structure with the lower clamping plate and is fixedly installed at the top end of the third docking plate, is provided at the bottom of the lower clamping plate. The upper surface of the lower clamping plate and the lower surface of the upper clamping plate are respectively provided with an integrated lower clamping table and an upper clamping table capable of clamping steel. A rod perforation with both ends in an open state is provided in the plate body of the upper clamping plate. A longitudinal limiting rod is placed in each rod perforation. The bottom end of the longitudinal limiting rod is fixedly installed on the upper surface of the lower clamping plate. The top end of the longitudinal limiting rod is provided with a top limiting plate having an integrated structure with it. A second helical spring is sleeved around the outer periphery of the rod body of the longitudinal limiting rod between the top limiting plate and the upper clamping plate.

[0015] Preferably, the bottom end of the second helical spring abuts against the upper surface of the lower clamping plate, the top end abuts against the bottom of the top limiting plate, and the initial length of the second helical spring is greater than the rod body length of the longitudinal limiting rod.

[0016] Compared with the prior art, the present invention provides a steel plasma cutting device for metal product processing, which has the following beneficial effects:

[0017] After the steel is installed, it can realize the directional movement of the steel, so as to facilitate the cutting effect of the steel at different positions. In addition, after the steel is fixed, the device can realize the cutting angle adjustment function of the steel, so that the required cutting angle can be adjusted independently according to the actual situation to expand the cutting angle range of the plasma laser cutter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective view of the present invention;

[0019] Figure 2 is a perspective sectional view of the present invention;

[0020] Figure 3 is a perspective view of the threaded horizontal movement mechanism in the present invention;

[0021] Figure 4 is a perspective sectional view of the threaded horizontal movement mechanism in the present invention;

[0022] Figure 5 is a perspective view of the hydraulic angle adjustment mechanism in the present invention;

[0023] Figure 6 is a perspective sectional view of the hydraulic angle adjustment mechanism in the present invention;

[0024] Figure 7 is a perspective view of the elastic clamping mechanism in the present invention;

[0025] Figure 8This is a three-dimensional sectional view of the elastic clamping mechanism in the present invention.

[0026] Among them: 1. Workbench plate; 2. Longitudinal support leg; 3. Limit sliding groove; 4. Plasma laser cutter; 5. Threaded horizontal movement mechanism; 51. Fixed base; 52. Shaft mounting hole; 53. Rotating shaft; 54. Hand crank; 55. Coupling; 56. Horizontal threaded rod; 57. Moving base; 58. Internal threaded hole; 59. Limit card slot; 510. First docking plate; 6. Hydraulic angle adjustment mechanism; 61. Cylindrical hollow shell; 62. Second docking plate; 63. Hemispherical shell; 64. Longitudinal component moving cavity; 65. Liquid limit flow cavity; 66. Liquid compensation channel; 67. Sector liquid reserve cavity; 68. Sector braking film; 69. Hemispherical cavity; 610. Piston plate; 611. First spiral spring; 612. Rotating ball head; 613. Third docking plate; 7. Elastic clamping mechanism; 71. Lower clamping plate; 72. Upper clamping plate; 73. Fourth docking plate; 74. Lower clamping table; 75. Upper clamping table; 76. Rod body perforation; 77. Longitudinal limit rod; 78. Top limit plate; 79. Second spiral spring. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figure 1 and Figure 2 , a steel plasma cutting device for metal product processing, including a workbench plate 1 with longitudinal support legs 2 installed at the bottom, a limit sliding groove 3 provided in the workbench plate 1 and having open upper and lower end faces, and a plasma laser cutter 4 fixedly installed on one side of the limit sliding groove 3. After the plasma laser cutter 4 is turned on, the steel can be cut.

[0029] In order to achieve the cutting effect on steel at different positions, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4, it is necessary to set up a threaded horizontal movement mechanism 5, which internally has a horizontal threaded rod 56 installed through bearings directly below the limit sliding groove 3 and capable of rotating, a hand crank 54 capable of driving the horizontal threaded rod 56 to rotate, and a moving base 57 that can move horizontally in a fixed direction along the limit sliding groove 3 when the horizontal threaded rod 56 rotates. By rotating the hand crank 54 in a fixed direction, the horizontal threaded rod 56 can be driven to rotate. Due to the connection of the threaded structure, the rotation of the horizontal threaded rod 56 will cause the moving base 57 to move along the axial direction of the limit sliding groove 3, enabling the cut part of the steel to coincide with the cutting surface of the plasma laser cutter 4, thereby achieving the cutting effect on steel at different positions.

[0030] For the specific structure of the threaded horizontal movement mechanism 5, please refer to Figure 3 and Figure 4 , and it also includes two fixed bases 51 fixedly installed on the bottom surface of the workbench plate 1. Each fixed base 51 internally has a shaft installation hole 52 with open ends at both ends. A rotatable rotating shaft 53 is installed through bearings inside each shaft installation hole 52. A hand crank 54 is fixedly installed at the end of one of the rotating shafts 53. The opposite ends of the two rotating shafts 53 are fixedly installed with a horizontal threaded rod 56 through a coupling 55. An internal threaded hole 58 is installed on the rod body of the horizontal threaded rod 56 through a threaded structure inside the moving base 57. Limit card slots 59 that are placed in the limit sliding groove 3 are arranged on both sides of the moving base 57. A first docking plate 510 with an integrated structure is arranged on the top of the moving base 57. The threaded structure includes an internal threaded structure arranged in the internal threaded hole 58 and an external threaded structure arranged on the rod body of the horizontal threaded rod 56, and the internal threaded structure matches the external threaded structure. The axis of the horizontal threaded rod 56 is directly below the center line of the limit sliding groove 3, and the axis of the horizontal threaded rod 56 and the center line of the limit sliding groove 3 are balanced with each other.

[0031] In order to be able to independently adjust the required cutting angle according to the actual situation to expand the cutting angle range of the plasma laser cutter 4, please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6, it is necessary to set up a hydraulic angle adjustment mechanism 6, which is provided with a cylindrical hollow shell 61 that can move with the mobile base 57 and is hollow inside, a hemispherical shell 63 that is arranged on the top of the cylindrical hollow shell 61 and has a rotating ball head 612 installed inside, a fan-shaped brake membrane 68 that is embedded in the bottom of the hemispherical shell 63 and can achieve a resistance braking effect on the hemispherical shell 63, a No. 1 coil spring 611 placed inside the cylindrical hollow shell 61 and exerting an upward elastic force, and a piston plate 610 placed inside the cylindrical hollow shell 61 and capable of transmitting the elastic force of the No. 1 coil spring 611 to the bottom surface of the fan-shaped brake membrane 68 in a hydraulic form. First, use a liquid syringe to pass the liquid The body compensation channel 66 injects liquid into the liquid limiting flow chamber 65. When the pressure of the liquid is greater than the elastic strength of the No. 1 coil spring 611, the piston plate 610 will move downward. At the same time, the elastic force of the No. 1 coil spring 611 will react to the bottom surface of the fan-shaped brake membrane 68 through the liquid pressure, so that the fan-shaped brake membrane 68 has a braking damping effect on the rotating ball head 612. Of course, this braking damping effect requires that the steel material can be kept in a stationary state during cutting. The user can adaptively rotate the steel material so that the steel material is at the desired cutting angle, so that the desired cutting angle can be adjusted independently according to the actual situation to expand the cutting angle range of the plasma laser cutter 4.

[0032] For the specific structure of the hydraulic angle adjustment mechanism 6, please refer to Figure 5 and Figure 6, further comprising a second docking plate 62. The bottom of the cylindrical hollow outer shell 61 is provided with a second docking plate 62 which is of an integral structure with it and fixedly installed at the top end of the first docking plate 510. The top end of the cylindrical hollow outer shell 61 is provided with a hemispherical outer shell 63 of an integral structure with it. The interior of the cylindrical hollow outer shell 61 is provided with a longitudinal component moving cavity 64. The cylindrical hollow outer shell 61 is provided with a liquid limiting flow cavity 65 at the top of the longitudinal component moving cavity 64. The hemispherical outer shell 63 is provided with a sector-shaped liquid reserve cavity 67 at the top of the liquid limiting flow cavity 65. The interior of the hemispherical outer shell 63 is provided with a hemispherical cavity 69 with an open top end and communicating with the sector-shaped liquid reserve cavity 67. The cylindrical hollow outer shell 61 is edge-embedded with a sector-shaped braking film 68 at the intersection of the hemispherical cavity 69 and the sector-shaped liquid reserve cavity 67. The hemispherical outer shell 63 is provided with a rotatable rotating ball head 612 placed inside the hemispherical cavity 69. The top of the rotating ball head 612 is provided with a third docking plate 613 of an integral structure with it. The outer circumferential surface of the cylindrical hollow outer shell 61 is provided with a liquid compensation channel 66 communicating with the outside space and the side of the liquid limiting flow cavity 65 and internally installed with a liquid valve. The cylindrical hollow outer shell 61 is provided with a piston plate 610 placed inside the longitudinal component moving cavity 64 and capable of moving axially along the longitudinal component moving cavity 64. The bottom space of the piston plate 610 is installed with a first helical spring 611 in a compressed state. The structural radius of the liquid limiting flow cavity 65 is smaller than the structural radius of the longitudinal component moving cavity 64. The structural radius of the rotating ball head 612 matches the structural radius of the hemispherical cavity 69, and the depth of the hemispherical cavity 69 is greater than the structural radius of the rotating ball head 612 and smaller than the structural diameter of the rotating ball head 612.

[0033] In order to achieve the elastic clamping and fixing effect on steel, please refer to Figure 1 , Figure 2 , Figure 7 and Figure 8 , it is necessary to set an elastic clamping mechanism 7, which internally has a lower clamping plate 71 and an upper clamping plate 72 fixedly installed at the top of the third docking plate 613 and capable of clamping steel, a longitudinal limiting rod 77 capable of enabling the lower clamping plate 71 and the upper clamping plate 72 to perform longitudinal relative movement, and a second helical spring 79 capable of generating an elastic clamping force between the lower clamping plate 71 and the upper clamping plate 72. Pull the upper clamping plate 72 upward. When the pulling force on the upper clamping plate 72 is greater than the elastic strength of the second helical spring 79, the lower clamping table 74 and the upper clamping table 75 will move away from each other. Then insert the steel between the lower clamping table 74 and the upper clamping table 75, and then release the pulling force on the upper clamping plate 72. Under the elastic strength of the second helical spring 79, the lower clamping table 74 and the upper clamping table 75 will perform an elastic clamping and fixing effect on the steel.

[0034] For the specific structure of the elastic clamping mechanism 7, please refer to Figure 7 and Figure 8 It also includes a lower clamping table 74 and an upper clamping table 75. At the bottom of the lower clamping plate 71, there is a fourth docking plate 73 which is of an integral structure with it and fixedly installed at the top end of the third docking plate 613. On the upper surface of the lower clamping plate 71 and the lower surface of the upper clamping plate 72, there are respectively a lower clamping table 74 and an upper clamping table 75 of an integral structure that can clamp steel. In the plate body of the upper clamping plate 72, there are rod perforations 76 with both ends in an open state. In each of the rod perforations 76, a longitudinal limiting rod 77 is placed. The bottom end of the longitudinal limiting rod 77 is fixedly installed on the upper surface of the lower clamping plate 71. At the top end of the longitudinal limiting rod 77, there is a top limiting plate 78 of an integral structure with it. A second helical spring 79 is sleeved around the outer periphery of the rod body of the longitudinal limiting rod 77 between the top limiting plate 78 and the upper clamping plate 72. The bottom end of the second helical spring 79 abuts against the upper surface of the lower clamping plate 71, and the top end abuts against the bottom of the top limiting plate 78. And the initial length of the second helical spring 79 is greater than the rod body length of the longitudinal limiting rod 77.

[0035] During use, a liquid syringe is used to inject liquid into the interior of the liquid limiting flow chamber 65 through the liquid compensation channel 66. When the pressure of the liquid is greater than the elastic strength of the first helical spring 611, the piston plate 610 will move downward. At the same time, the elastic acting force of the first helical spring 611 will act on the bottom surface of the sector brake film 68 through the liquid pressure, so that the sector brake film 68 produces a braking damping effect on the rotating ball head 612. Of course, this braking damping effect needs to ensure that the steel remains stationary during cutting. Then, the upper clamping plate 72 is pulled upward. When the pulling force on the upper clamping plate 72 is greater than the elastic strength of the second helical spring 79, the lower clamping table 74 and the upper clamping table 75 will move away from each other. Then the steel is inserted between the lower clamping table 74 and the upper clamping table 75. Then the pulling force on the upper clamping plate 72 is released. Under the elastic strength of the second helical spring 79, the lower clamping table 74 and the upper clamping table 75 will elastically clamp and fix the steel. The hand crank 54 is rotated directionally, and the horizontal threaded rod 56 can be driven to rotate. Due to the threaded connection structure, the rotation of the horizontal threaded rod 56 will cause the moving base 57 to move along the axial direction of the limit sliding groove 3, enabling the cut part of the steel to coincide with the cutting surface of the plasma laser cutter 4. The user can adaptively rotate the steel material to make the steel at the required cutting angle. After the plasma laser cutter 4 is turned on, the steel can be cut.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel plasma cutting device for metal product processing, comprising a workbench plate (1) with longitudinal support legs (2) installed at the bottom, a limiting sliding groove (3) arranged in the workbench plate (1) and having openings at both the upper and lower end faces, and a plasma laser cutter (4) fixedly installed on one side of the limiting sliding groove (3), characterized in that: Also includes, The threaded horizontal moving mechanism (5) is provided with a rotatable horizontal threaded rod (56) installed directly below the limiting slide groove (3) through a bearing, a hand-cranked wheel (54) capable of driving the horizontal threaded rod (56) to rotate, and a moving base (57) capable of directional horizontal movement along the limiting slide groove (3) when the horizontal threaded rod (56) rotates; And a hydraulic angle adjustment mechanism (6), which is provided with a cylindrical hollow shell (61) which can move with the movable base (57) and is hollow inside, a hemispherical shell (63) arranged on the top of the cylindrical hollow shell (61) and equipped with a rotating ball head (612), a fan-shaped brake membrane (68) embedded in the bottom of the hemispherical shell (63) and capable of achieving a resistance braking effect on the hemispherical shell (63), a No. 1 coil spring (611) placed inside the cylindrical hollow shell (61) and exerting an upward elastic force, and a piston plate (610) placed inside the cylindrical hollow shell (61) and capable of transmitting the elastic force of the No. 1 coil spring (611) to the bottom surface of the fan-shaped brake membrane (68) in a hydraulic form.

2. The plasma cutting device for steel used in the processing of metal products according to claim 1, characterized in that: The threaded horizontal moving mechanism (5) also includes two fixed bases (51) fixedly mounted on the bottom surface of the workbench (1), each of the fixed bases (51) is provided with an axle mounting hole (52) with both ends being open, each of the axle mounting holes (52) is provided with a rotatable rotating shaft (53) through a bearing, one end of the rotating shaft (53) is fixedly mounted with a hand-cranked wheel (54), the opposite ends of the two rotating shafts (53) are fixedly mounted with a horizontal threaded rod (56) through a coupling (55), the interior of the movable base (57) is provided with an internal threaded hole (58) mounted on the rod body of the horizontal threaded rod (56) through a threaded structure, both sides of the movable base (57) are provided with limiting slots (59) clamped in the limiting slide groove (3), and the top of the movable base (57) is provided with a No. 1 docking plate (510) with an integral structure therewith.

3. The plasma cutting device for steel used in the processing of metal products according to claim 2, characterized in that: The thread structure comprises an internal thread structure arranged in the internal thread hole (58) and an external thread structure arranged on the rod body of the horizontal thread rod (56), and the internal thread structure matches the external thread structure.

4. A steel plasma cutting device for metal product processing according to claim 3, characterized in that: The axis center line of the horizontal threaded rod (56) is located directly below the center line of the limiting sliding groove (3), and the axis center line of the horizontal threaded rod (56) and the center line of the limiting sliding groove (3) are balanced with each other.

5. A steel plasma cutting device for metal product processing according to claim 4, characterized in that: The hydraulic angle adjustment mechanism (6) further includes a second docking plate (62). The bottom of the cylindrical hollow housing (61) is provided with a second docking plate (62) which is of an integral structure with it and fixedly installed at the top of the first docking plate (510). The top of the cylindrical hollow housing (61) is provided with a hemispherical housing (63) which is of an integral structure with it. The interior of the cylindrical hollow housing (61) is provided with a longitudinal component activity cavity (64). The cylindrical hollow housing (61) is provided with a liquid limit flow cavity (65) at the top of the longitudinal component activity cavity (64). The hemispherical housing (63) is provided with a sector-shaped liquid reserve cavity (67) at the top of the liquid limit flow cavity (65). The interior of the hemispherical housing (63) is provided with a hemispherical cavity (69) with an open top and communicating with the sector-shaped liquid reserve cavity (67). The cylindrical hollow housing (61) is hermetically embedded with a sector-shaped brake film (68) at the intersection of the hemispherical cavity (69) and the sector-shaped liquid reserve cavity (67). The hemispherical housing (63) is provided with a rotatable rotating ball head (612) placed inside the hemispherical cavity (69). The top of the rotating ball head (612) is provided with a third docking plate (613) which is of an integral structure with it. The outer circumferential surface of the cylindrical hollow housing (61) is provided with a liquid compensation channel (66) communicating with the outside space and the side of the liquid limit flow cavity (65) and internally installed with a liquid valve. The cylindrical hollow housing (61) is provided with a piston plate (610) placed inside the longitudinal component activity cavity (64) and capable of moving axially along the longitudinal component activity cavity (64). The bottom space of the piston plate (610) is installed with a first helical spring (611) in a compressed state.

6. The plasma cutting device for steel used in metal product processing according to claim 5, characterized in that: The structural radius of the liquid limit flow cavity (65) is smaller than the structural radius of the longitudinal component activity cavity (64).

7. A steel plasma cutting device for metal product processing according to claim 6, characterized in that: The structural radius of the rotating ball head (612) matches the structural radius of the hemispherical cavity (69), and the depth of the hemispherical cavity (69) is greater than the structural radius of the rotating ball head (612) and smaller than the structural diameter of the rotating ball head (612).

8. A plasma cutting device for steel used in metal product processing according to claim 7, characterized in that: It further includes an elastic clamping mechanism (7), which internally includes a lower clamping plate (71) and an upper clamping plate (72) fixedly installed at the top of the third docking plate (613) and capable of clamping steel, a longitudinal limiting rod (77) capable of causing longitudinal relative movement between the lower clamping plate (71) and the upper clamping plate (72), and a second helical spring (79) causing elastic clamping force between the lower clamping plate (71) and the upper clamping plate (72).

9. A steel plasma cutting device for metal product processing according to claim 8, characterized in that: The elastic clamping mechanism (7) further includes a lower clamping table (74) and an upper clamping table (75). A fourth docking plate (73) which is of an integral structure with the lower clamping plate (71) and fixedly installed at the top end of the third docking plate (613) is provided at the bottom of the lower clamping plate (71). An integrally formed lower clamping table (74) and an upper clamping table (75) capable of clamping steel are respectively provided on the upper surface of the lower clamping plate (71) and the lower surface of the upper clamping plate (72). A rod body through hole (76) with both ends open is provided in the plate body of the upper clamping plate (72). A longitudinal limiting rod (77) is placed in each of the rod body through holes (76). The bottom end of the longitudinal limiting rod (77) is fixedly installed on the upper surface of the lower clamping plate (71). A top limiting plate (78) which is of an integral structure with the longitudinal limiting rod (77) is provided at the top end of the longitudinal limiting rod (77). A second helical spring (79) is sleeved on the outer periphery of the rod body of the longitudinal limiting rod (77) between the top limiting plate (78) and the upper clamping plate (72).

10. A steel plasma cutting device for metal product processing according to claim 9, characterized in that: The bottom end of the second helical spring (79) abuts against the upper surface of the lower clamping plate (71), the top end abuts against the bottom of the top limiting plate (78), and the initial length of the second helical spring (79) is greater than the rod body length of the longitudinal limiting rod (77).

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