H-shaped steel plasma beveling special machine and machining process thereof

Abstract

The application discloses a H-shaped steel plasma groove special machine and a machining process thereof, and belongs to the technical field of H-shaped steel machining. The application comprises a workpiece input line, a workpiece overturning line and a workpiece output line. The output end of the workpiece input line is connected with a first cutting torch operating chamber, and the output end of the workpiece overturning line is connected with a second cutting torch operating chamber. The two ends of the workpiece overturning line are movably connected with the first cutting torch operating chamber and the second cutting torch operating chamber respectively. The application is mainly used for simultaneously performing groove forming on four edges of multiple H-shaped steels and patterned H-shaped steels. During the cutting process, the cutting torch performs straight seam cutting along the length direction of the lower flange of the workpiece. When the workpiece completely enters the workpiece overturning line, the workpiece is overturned by 180 degrees, and then the lower flange of the overturned workpiece is cut. The groove forming on the four edges of the workpiece can be completed, the groove consistency of the workpiece is effectively ensured, the assembly and welding process of the next process are facilitated, the cutting process is rapid and safe, and the cutting efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of H-shaped steel processing, more particularly to an H-shaped steel plasma groove special machine and a processing technology thereof. BACKGROUND

[0002] In the prior art, H-shaped steel is arranged in parallel during use, so as to form a steel support structure by mutual assembly welding. Before welding, the flange edges of adjacent H-shaped steel need to be beveled, so as to facilitate the subsequent welding work. The upper and lower flanges of the H-shaped steel need to be beveled respectively, and then the next assembly welding work can be carried out. In the prior art, a worker manually holds a beveling machine to bevel the four sides of the H-shaped steel. This results in a long beveling cycle and low efficiency, which greatly affects the smooth progress of the subsequent process. Moreover, the precision of the beveling by the manual beveling machine cannot be guaranteed, and the beveling angle cannot be accurately controlled, which directly affects the subsequent assembly welding effect. SUMMARY

[0003] 1. TECHNICAL PROBLEM

[0004] In view of the defects and deficiencies in the prior art, the present application provides an H-shaped steel plasma groove special machine and a processing technology thereof. The H-shaped steel plasma groove special machine is mainly used for beveling the four sides of multiple H-shaped steel and patterned H-shaped steel simultaneously. The cutting process is fast, safe and efficient. During the cutting process, the workpiece input roller drives the workpiece to move, so that the cutting torch performs straight seam cutting along the length direction of the lower flange of the workpiece. The workpiece gradually enters the workpiece turnover line as the cutting process proceeds. When the workpiece completely enters the workpiece turnover line, the positioning and clamping of the workpiece are controlled by the PLC, and the workpiece is turned over by 180 degrees. Then, the two side edges of the lower flange of the turned-over workpiece are cut. Thus, the beveling of the four sides of the workpiece is completed simultaneously. The workpiece beveling consistency is effectively guaranteed, which is beneficial to the assembly and welding process of the next process, and greatly improves the efficiency of workpiece beveling.

[0005] 2. TECHNICAL SCHEME

[0006] To achieve the above-mentioned purpose, the technical scheme provided by the present application is as follows:

[0007] The H-shaped steel plasma groove special machine of the present application comprises a workpiece input line, a workpiece turnover line and a workpiece output line. The output end of the workpiece input line is connected with a first cutting torch operation room. The output end of the first cutting torch operation room is connected with the workpiece turnover line. The output end of the workpiece turnover line is connected with a second cutting torch operation room. The output end of the second cutting torch operation room is connected with the workpiece output line.

[0008] The two ends of the workpiece overturning line are respectively movably connected with the first cutting torch operation room and the second cutting torch operation room, and the workpiece overturning line rotates relative to the first cutting torch operation room and the second cutting torch operation room.

[0009] The inner side of the first cutting torch operation room and the second cutting torch operation room is respectively provided with a cutting torch assembly.

[0010] The upper end of the workpiece input line carries a workpiece.

[0011] Further, the workpiece input line comprises a workpiece input workbench, the upper end of the workpiece input workbench is provided with a workpiece input roller at intervals, and the upper end of the workpiece input roller carries a workpiece; and the output end of the workpiece input workbench is provided with the first cutting torch operation room.

[0012] The two sides of the workpiece input workbench are provided with first line rails, and one end of the workpiece input workbench is provided with a clamping device.

[0013] Further, the workpiece output line comprises a workpiece output workbench, the upper end of the workpiece output workbench is provided with a workpiece output roller at intervals, the two sides of the workpiece output workbench are provided with second line rails, and one end of the workpiece output workbench is also provided with a clamping device, the clamping device slides along the second line rail, and the surfaces of the workpiece output workbench and the workpiece input workbench are both provided with positioning baffles at intervals, and the two ends of the positioning baffles are open.

[0014] Further, the clamping device comprises a trolley, the trolley slides along the first line rail or the second line rail, the upper end of the trolley is provided with a clamping cylinder, the front end of the clamping cylinder is provided with a chuck, and the clamping cylinder drives the chuck to clamp the web of the workpiece.

[0015] Further, the workpiece overturning line comprises a slewing bearing, a rotating frame and a rotating frame fixing plate, the slewing bearing is provided with two groups and is respectively installed in the middle of the first cutting torch operation room and the second cutting torch operation room, the two sides of the rotating frame are both provided with rotating frame fixing plates, the rotating frame fixing plates are installed in the inner ring of the slewing bearing, the two ends of the rotating frame are respectively rotatably connected with the slewing bearing through the rotating frame fixing plates, the upper and lower ends of the rotating frame are both provided with limiting conveying rollers at intervals, and the side edges of the rotating frame are provided with multiple groups of limiting clamping cylinders at intervals, and the output ends of the limiting clamping cylinders act on the web of the workpiece.

[0016] Further, the cutting torch assembly comprises a horizontal cross beam, a horizontal moving slider, a lifting arm, a first cutting torch head and a second cutting torch head.

[0017] The horizontal cross beam is provided with two groups and is fixed at the inner top of the first cutting torch operating chamber and the second cutting torch operating chamber respectively, two groups of horizontal moving sliders are installed on the horizontal cross beam at intervals, the horizontal moving sliders slide along the horizontal cross beam, the bottom of the two groups of horizontal moving sliders is hung with lifting arms respectively, and the output ends of the two groups of lifting arms are correspondingly provided with the first cutting torch head and the second cutting torch head respectively.

[0018] Further, the head ends of the first cutting torch head and the second cutting torch head are respectively provided with two-dimensional sensor tracking mechanisms, and the two-dimensional sensor tracking mechanisms are composed of a sensor, a control system and an execution mechanism.

[0019] The electronic sensor senses the distance of the workpiece, collects the straightness and height and transverse change signals of the workpiece, and through amplification and conversion of the controller, the horizontal moving slider and the lifting arm execute precise follow-up of the cutting torch, so that the cutting torch is aligned with the beveling position of the workpiece, and the cutting process is realized without manual operation.

[0020] Further, the middle parts of the first cutting torch operating chamber and the second cutting torch operating chamber are respectively provided with conveying holes, and the top parts of the first cutting torch operating chamber and the second cutting torch operating chamber are respectively provided with smoke collecting holes.

[0021] A machining process of an H-shaped steel plasma beveling special machine, comprising the following steps:

[0022] Step one: place the workpiece on the workpiece input workbench of the workpiece input line, and start the workpiece input roller;

[0023] Step two: the front end of the workpiece is displaced to the intersection of the workpiece overturning line and the first cutting torch operating chamber, the positioning function of the cutting torch assembly is realized through the two-dimensional sensor tracking mechanism, after positioning is completed, the first cutting torch head and the second cutting torch head are started to cut at a constant speed;

[0024] Step three: during the cutting process of the first cutting torch operating chamber, the head ends of the first cutting torch head and the second cutting torch head of the cutting torch assembly respectively point to the two side edges of the lower flange of the workpiece, the workpiece input roller drives the workpiece to move, so as to realize straight cutting of the cutting torch along the length direction of the lower flange of the workpiece, and the workpiece gradually enters the workpiece overturning line along with the cutting process;

[0025] Step four: when the workpiece completely enters the workpiece overturning line, the PLC controls a plurality of limiting clamping cylinders to work on the web position of the workpiece, so as to realize the positioning and clamping functions of the workpiece, and drives the rotating frame to rotate around the rotary support to realize the overturning function, after the workpiece is overturned by 180 degrees, the limiting clamping cylinder is released, the limiting conveying roller transmits the conveying instruction, and the workpiece is conveyed forward and enters the second cutting torch operating chamber to perform the second cutting process;

[0026] Step five: during the second cutting process, the limiting conveying roller drives the workpiece to move at a constant speed forward, and the lower flange of the workpiece after turning is cut, the workpiece gradually enters the workpiece output line with the cutting process, and when the workpiece cutting is completed, the workpiece conveying is transferred to the workpiece group matching process, which ensures the consistency of the workpiece groove and is beneficial to the matching and welding process of the next process.

[0027] Further, in the step four, when cutting the same type of workpiece, the workpiece input workbench of the workpiece input line can again put the same type of workpiece to be processed after the workpiece conveyed first enters the second cutting gun operation room to carry out the second cutting process, and the cutting process of the first cutting gun operation room is carried out, wherein when the workpiece turning line is in a static state, the four cutting guns of the first cutting gun operation room and the second cutting gun operation room can simultaneously arc cutting, thereby improving the cutting efficiency.

[0028] 3. Beneficial effects

[0029] Compared with the prior art, the technical scheme provided by the present application has the following beneficial effects:

[0030] The H-shaped steel plasma groove special machine of the present application is mainly used for simultaneously cutting the four edges of the H-shaped steel and the patterned H-shaped steel, and cutting according to the process requirements. The cutting process is rapid, safe and high in efficiency. During the cutting process, the workpiece input roller drives the workpiece to move, so that the cutting gun cuts along the length direction of the lower flange of the workpiece. The workpiece gradually enters the workpiece turning line with the cutting process. When the workpiece completely enters the workpiece turning line, the positioning and clamping of the workpiece are controlled by the PLC, and the workpiece is turned by 180 degrees. Then, the lower flange of the workpiece after turning is cut. Thus, the four edges of the workpiece are simultaneously cut, which effectively ensures the consistency of the workpiece groove and is beneficial to the matching and welding process of the next process, and greatly improves the efficiency of the workpiece groove processing. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a front view of the present application;

[0032] Figure 2 It is a side view of the present application;

[0033] Figure 3 It is a bottom view of the present application;

[0034] Figure 4 It is a bottom side view of the present application;

[0035] Figure 5 It is a structure diagram of the workpiece input line of the present application;

[0036] Figure 6 It is a structure diagram of the workpiece turning line of the present application;

[0037] Figure 7 Partially enlarged view of the workpiece flipping line of the present application;

[0038] Figure 8 Structural diagram of the workpiece output line of the present application;

[0039] Figure 9 First torch operating chamber of the present application, bottom view;

[0040] Figure 10 Overall structure of the present application, top view;

[0041] Figure 11 Enlarged view of the clamping device of the present application;

[0042] Figure 12 Enlarged view of the positioning baffle of the present application;

[0043] Figure 13 Workpiece 30° bevel forming effect diagram of the present application;

[0044] Figure 14 Workpiece 25° bevel forming effect diagram of the present application.

[0045] In the figure: 1, workpiece input line; 101, workpiece input workbench; 102, workpiece input roller; 103, first line rail; 2, workpiece flipping line; 201, rotary support; 202, rotary frame; 203, rotary frame fixing plate; 204, limiting conveying roller; 205, limiting clamping cylinder; 3, workpiece output line; 301, workpiece output workbench; 302, workpiece output roller; 303, second line rail; 4, first torch operating chamber; 401, conveying channel; 402, smoke dust collecting channel; 5, second torch operating chamber; 6, workpiece; 7, clamping device; 701, trolley; 702, clamping cylinder; 703, chuck; 8, torch assembly; 801, horizontal cross beam; 802, horizontal moving slider; 803, lifting arm; 804, first torch head; 805, second torch head; 9, two-dimensional sensor tracking mechanism; 10, positioning baffle. DETAILED DESCRIPTION

[0046] The present application will be further described below in conjunction with the accompanying drawings and examples:

[0047] Example 1

[0048] From Figures 1-4It can be seen that the H-shaped steel plasma bevel special machine of the embodiment comprises a workpiece input line 1, a workpiece overturning line 2 and a workpiece output line 3, the output end of the workpiece input line 1 is connected with a first cutting torch operating chamber 4, the output end of the first cutting torch operating chamber 4 is connected with the workpiece overturning line 2, the output end of the workpiece overturning line 2 is connected with a second cutting torch operating chamber 5, and the output end of the second cutting torch operating chamber 5 is connected with the workpiece output line 3;

[0049] The two ends of the workpiece overturning line 2 are movably connected with the first cutting torch operating chamber 4 and the second cutting torch operating chamber 5 respectively, and the workpiece overturning line 2 rotates about the first cutting torch operating chamber 4 and the second cutting torch operating chamber 5 as the fixed axis;

[0050] The inner sides of the first cutting torch operating chamber 4 and the second cutting torch operating chamber 5 are respectively provided with a cutting torch assembly 8;

[0051] The upper end of the workpiece input line 1 carries a workpiece 6.

[0052] When the workpiece 6 is located on the workpiece input line 1, parameter debugging can be performed in advance, when the workpiece input line 1 is started to operate, the workpiece 6 reaches a fixed position and performs positioning, constant speed and cutting functions according to the debugging parameters, and the workpiece 6 enters the workpiece overturning line 2 in the cutting process;

[0053] When the workpiece 6 completely enters the workpiece overturning line 2, positioning, clamping and overturning functions are realized by PLC control, the workpiece overturns 180 degrees to execute loosening and conveying instructions, and the workpiece 6 starts to enter the second cutting process, while the first conveying device starts the cutting process; when cutting the same type of workpiece 6, the workpiece overturning line 2 is in a stationary state, four plasma torches simultaneously arc cutting, and the cutting efficiency is improved by nearly one time.

[0054] From Figure 5 It can be seen that the workpiece input line 1 comprises a workpiece input workbench 101, the upper end of the workpiece input workbench 101 is provided with workpiece input rollers 102 at intervals, and the upper end of the workpiece input rollers 102 carries the workpiece 6; and the output end of the workpiece input workbench 101 is provided with the first cutting torch operating chamber 4;

[0055] The two sides of the workpiece input workbench 101 are provided with first line rails 103, and one end of the workpiece input workbench 101 is provided with the clamping device 7.

[0056] From Figure 8 It can be seen that the workpiece output line 3 comprises a workpiece output workbench 301, the upper end of the workpiece output workbench 301 is provided with workpiece output rollers 302 at intervals, the two sides of the workpiece output workbench 301 are provided with second line rails 303, and one end of the workpiece output workbench 301 is also provided with the clamping device 7, the clamping device 7 slides along the second line rails 303, and the surfaces of the workpiece output workbench 301 and the workpiece input workbench 101 are both provided with positioning baffles 10,Figure 12 It can be seen that the two ends of the positioning baffle 10 are open, and the positioning and guiding functions can be realized at the same time.

[0057] From Figures 10-11 It can be seen that the clamping device 7 includes a trolley 701 that slides along the first track 103 or the second track 303, and the upper end of the trolley 701 is provided with a clamping cylinder 702, and the front end of the clamping cylinder 702 is provided with a chuck 703. The clamping cylinder 702 drives the chuck 703 to clamp the web of the workpiece 6.

[0058] When the workpiece 6 is just placed on the workpiece input workbench 101, the workpiece input roller 102 is in a stationary state, and the workpiece 6 can be clamped by the clamping device 7, so as to adjust the placement position of the workpiece 6. After the position adjustment is completed, the workpiece input roller 102 can be started to pull the workpiece 6 forward for conveying;

[0059] When the workpiece 6 is cut, the workpiece 6 can be clamped by the chuck 703 of the clamping device 7 and pulled out from the workpiece output workbench 301;

[0060] From Figures 6-7 It can be seen that the workpiece overturning line 2 includes a rotary support 201, a rotating frame 202, and a rotating frame fixing plate 203. The rotary support 201 is provided with two groups and is respectively installed in the middle of the first cutting torch operating room 4 and the second cutting torch operating room 5. The rotating frame 202 is provided with rotating frame fixing plates 203 on both sides, and the rotating frame fixing plates 203 are installed on the inner ring of the rotary support 201. The two ends of the rotating frame 202 are respectively connected with the rotary support 201 through the rotating frame fixing plates 203. The upper and lower ends of the rotating frame 202 are both provided with limiting conveying rollers 204, and the side edges of the rotating frame 202 are provided with multiple groups of limiting clamping cylinders 205. The output end of the limiting clamping cylinder 205 acts on the web of the workpiece 6.

[0061] The rotating frame 202 is composed of rectangular tubes and is welded. During overturning, the output ends of the multiple groups of limiting clamping cylinders 205 directly act on the web of the workpiece 6, and the overturning process is stable and reliable.

[0062] From Figure 2 , Figure 9 It can be seen that the cutting torch assembly 8 includes a horizontal cross beam 801, a horizontal moving slider 802, a lifting arm 803, a first cutting torch head 804, and a second cutting torch head 805.

[0063] The horizontal cross beam 801 is provided with two groups and is fixed at the inner side top of the first cutting torch operation room 4 and the second cutting torch operation room 5 respectively, two groups of horizontal moving sliders 802 are installed on the horizontal cross beam 801 at intervals, the horizontal moving sliders 802 slide along the horizontal cross beam 801, the bottom of the two groups of horizontal moving sliders 802 are hung with lifting arms 803, and the output ends of the two groups of lifting arms 803 are respectively provided with first cutting torch heads 804 and second cutting torch heads 805.

[0064] The first cutting torch head 804 and the second cutting torch head 805 can be adjusted in position in the horizontal direction along the horizontal cross beam 801 under the action of the horizontal moving slider 802, and the first cutting torch head 804 and the second cutting torch head 805 can be adjusted in position in the vertical direction under the action of the lifting arm 803, so that the head end of the first cutting torch head 804 and the second cutting torch head 805 extends to the position of the flange edge of the workpiece 6 to be machined.

[0065] The head end of the first cutting torch head 804 and the second cutting torch head 805 is respectively provided with a two-dimensional sensor tracking mechanism 9, which is composed of a sensor, a control system and an execution mechanism;

[0066] The electronic sensor senses the distance of the workpiece 6, collects the straightness and height of the workpiece 6 and the transverse change signal, and through the amplification and conversion of the controller, the horizontal moving slider 802 and the lifting arm 803 execute the precise follow-up of the cutting torch, so that the cutting torch is aligned with the beveling position of the workpiece 6, and the cutting process is realized without human operation.

[0067] The two-dimensional sensor tracking mechanism 9 cooperates with the horizontal moving slider 802 and the lifting arm 803 to adjust the position and angle of the cutting torch, so as to meet the cutting process requirements; during the cutting process, the two-dimensional sensor tracking mechanism 9 ensures that the cutting torch always points to the cutting position, so as to ensure the cutting effect.

[0068] The middle part of the first cutting torch operation room 4 and the second cutting torch operation room 5 is respectively provided with a conveying hole 401, and the top part of the first cutting torch operation room 4 and the second cutting torch operation room 5 is respectively provided with a smoke collecting hole 402, which is used as a reserved exhaust port and can be connected with a smoke purification system. The smoke generated during the cutting process of the first cutting torch operation room 4 and the second cutting torch operation room 5 can be promptly extracted through the smoke purification system, so as to create a good working environment.

[0069] A machining process of an H-shaped steel plasma beveling special machine, the steps are:

[0070] Step one: place the workpiece 6 on the workpiece input workbench 101 of the workpiece input line 1, and start the workpiece input roller 102;

[0071] Step two: the front end of the workpiece 6 is displaced to the intersection of the workpiece turnover line 2 and the first cutting torch operating chamber 4, the positioning function of the cutting torch assembly 8 is realized through the two-dimensional sensor tracking mechanism 9, after positioning is completed, the first cutting torch head 804 and the second cutting torch head 805 are started to cut at a constant speed;

[0072] Step three: during the cutting process of the first cutting torch operating chamber 4, the head ends of the first cutting torch head 804 and the second cutting torch head 805 of the cutting torch assembly 8 respectively point to the two side edges of the lower flange of the workpiece 6, the workpiece input roller 102 drives the workpiece 6 to move, so as to realize straight seam cutting of the cutting torch along the length direction of the lower flange of the workpiece 6, and the workpiece 6 gradually enters the workpiece turnover line 2 along with the cutting process;

[0073] Step four: when the workpiece 6 completely enters the workpiece turnover line 2, the PLC controls a plurality of limiting clamping cylinders 205 to work on the web plate position of the workpiece 6, so as to realize the positioning and clamping functions of the workpiece 6, at the same time, the rotating frame 202 is driven to rotate around the rotary support 201 to realize the turnover function, after the workpiece 6 is turned over by 180 degrees, the limiting clamping cylinder 205 is released, the limiting conveying roller 204 transmits the conveying instruction, and the workpiece 6 is conveyed forward and enters the second cutting torch operating chamber 5 to perform the second cutting process;

[0074] When cutting the same type of workpiece 6, after the workpiece 6 conveyed first enters the second cutting torch operating chamber 5 to perform the second cutting process, the workpiece input workbench 101 of the workpiece input line 1 can again put in the same type of workpiece 6 to be processed, and perform the cutting process of the first cutting torch operating chamber 4, wherein when the workpiece turnover line 2 is in a static state, the four cutting torches of the first cutting torch operating chamber 4 and the second cutting torch operating chamber 5 can simultaneously arc cutting, so as to improve the cutting efficiency.

[0075] Step five: during the second cutting process, the limiting conveying roller 204 drives the workpiece 6 to convey at a constant speed, and cuts the two side edges of the lower flange of the workpiece 6 after being turned over, the workpiece 6 gradually enters the workpiece output line 3 along with the cutting process, and when the workpiece 6 is cut, the workpiece 6 is conveyed and transferred into the workpiece group matching process, so as to ensure the consistency of the workpiece 6, and be beneficial to the matching and welding process of the next process.

[0076] Since the workpiece 6 is conveyed forward under the driving of the workpiece output roller 302, the workpiece input roller 102 and the limiting conveying roller 204, the cutting speed of the workpiece 6 is directly affected by the driving speed of the workpiece output roller 302, the workpiece input roller 102 and the limiting conveying roller 204.

[0077] The H-shaped steel plasma beveling special machine of the present application is mainly used for simultaneously beveling four edges of multiple H-shaped steels and patterned H-shaped steels, and cutting according to process requirements. The cutting process is rapid, safe and high in cutting efficiency. During the cutting process, the workpiece 6 is placed on the workpiece input workbench 101 of the workpiece input line 1, the workpiece input roller 102 drives the workpiece 6 to move so as to realize straight seam cutting of the cutting torch along the length direction of the lower flange of the workpiece 6. The workpiece 6 gradually enters the workpiece overturning line 2 along with the cutting process. When the workpiece 6 completely enters the workpiece overturning line 2, the positioning and clamping of the workpiece 6 are controlled by PLC, and the workpiece 6 is overturned by 180 degrees. Then, the workpiece 6 is forwarded to the second cutting torch operation room 5 to perform the second cutting process, and the lower flange sides of the overturned workpiece 6 are cut. Thus, the beveling of the four edges of the workpiece 6 is completed, and the beveling effect is as shown in Figure 13 、 14 The effective guarantee of the workpiece 6 beveling consistency is beneficial to the assembly and welding process of the next process, and greatly improves the efficiency of the workpiece 6 beveling process.

[0078] The above description of the present application and its embodiments is illustrative and not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired thereby, without departing from the spirit of the present application, similar structural modes and embodiments can be designed without creativity, which should belong to the protection scope of the present application.

Claims

1. A processing technology of H-shaped steel plasma beveling special machine, the beveling special machine comprising a workpiece input line (1), a workpiece overturning line (2) and a workpiece output line (3), characterized in that: The output end of the workpiece input line (1) is connected with a first cutting torch operation room (4), the output end of the first cutting torch operation room (4) is connected with a workpiece overturning line (2), the output end of the workpiece overturning line (2) is connected with a second cutting torch operation room (5), and the output end of the second cutting torch operation room (5) is connected with a workpiece output line (3); The two ends of the workpiece overturning line (2) are movably connected with the first cutting torch operation room (4) and the second cutting torch operation room (5) respectively, and the workpiece overturning line (2) rotates about the first cutting torch operation room (4) and the second cutting torch operation room (5) as the fixed shaft; The inner sides of the first cutting torch operation room (4) and the second cutting torch operation room (5) are respectively provided with cutting torch assemblies (8); The upper end of the workpiece input line (1) bears a workpiece (6); The workpiece overturning line (2) comprises a slewing bearing (201), a rotating frame (202) and a rotating frame fixing plate (203), the slewing bearing (201) is provided with two groups and is mounted in the middle of the first cutting torch operation room (4) and the second cutting torch operation room (5) respectively, the two sides of the rotating frame (202) are both provided with the rotating frame fixing plate (203), the rotating frame fixing plate (203) is mounted on the inner ring of the slewing bearing (201), the two ends of the rotating frame (202) are movably connected with the slewing bearing (201) through the rotating frame fixing plate (203), the upper and lower ends of the rotating frame (202) are both provided with the limiting conveying roller (204) at intervals, and the side edges of the rotating frame (202) are provided with multiple groups of limiting clamping cylinders (205) at intervals, and the output end of the limiting clamping cylinder (205) acts on the web plate of the workpiece (6); The machining process comprises the following steps: Step one: place the workpiece (6) on the workpiece input workbench (101) of the workpiece input line (1), and start the workpiece input roller (102); Step two: the front end of the workpiece (6) is displaced to the joint of the workpiece overturning line (2) and the first cutting torch operation room (4), the positioning function of the cutting torch assembly (8) is realized through the two-dimensional sensor tracking mechanism (9), after positioning, the first cutting torch head (804) and the second cutting torch head (805) are started to cut at a constant speed; Step three: during the cutting process of the first cutting torch operation room (4), the gun head ends of the first cutting torch head (804) and the second cutting torch head (805) of the cutting torch assembly (8) respectively point to the two side edges of the lower flange of the workpiece (6), the workpiece input roller (102) drives the workpiece (6) to move, so as to realize straight seam cutting of the cutting torch along the length direction of the lower flange of the workpiece (6), and the workpiece (6) gradually enters the workpiece overturning line (2) with the cutting process; Step four: when the workpiece (6) is completely in the workpiece overturning line (2), the PLC controls the multi-group limiting clamping cylinder (205) to work on the web position of the workpiece (6), realizes the positioning and clamping function of the workpiece (6), drives the rotary frame (202) to rotate around the rotary support (201) to realize the overturning function, and after the workpiece (6) is overturned by 180 degrees, the limiting clamping cylinder (205) is released, the limiting conveying roller (204) transmits the instruction, the workpiece (6) is conveyed forward and enters the second cutting gun operation room (5) to perform the second cutting process; Step five: during the second cutting process, the limiting conveying roller (204) drives the workpiece (6) to convey forward at a constant speed, and cuts the edge of the lower flange of the overturned workpiece (6), and the workpiece (6) gradually enters the workpiece output line (3) along with the cutting process, and when the workpiece (6) is cut, the workpiece (6) is conveyed into the workpiece (6) group matching process, which ensures the consistency of the workpiece (6) groove and is beneficial to the next process of matching and welding process.

2. The machining process of a H-shaped steel plasma bevel special machine according to claim 1, characterized in that: The workpiece input line (1) comprises a workpiece input workbench (101), and the upper end of the workpiece input workbench (101) is provided with workpiece input rollers (102) at intervals, and the upper end of the workpiece input rollers (102) bears the workpiece (6); the output end of the workpiece input workbench (101) is provided with a first cutting gun operation room (4); The two sides of the workpiece input workbench (101) are provided with first line rails (103), and one end of the workpiece input workbench (101) is provided with a clamping device (7).

3. The machining process of a H-beam plasma beveling special machine according to claim 2, characterized in that: The workpiece output line (3) comprises a workpiece output workbench (301), and the upper end of the workpiece output workbench (301) is provided with workpiece output rollers (302) at intervals; the two sides of the workpiece output workbench (301) are provided with second line rails (303), and one end of the workpiece output workbench (301) is also provided with a clamping device (7); the clamping device (7) slides along the second line rail (303); the surfaces of the workpiece output workbench (301) and the workpiece input workbench (101) are both provided with positioning baffles (10) at intervals, and the two ends of the positioning baffle (10) are in an open state.

4. The machining process of a H-shaped steel plasma bevel special machine according to claim 3, characterized in that: The clamping device (7) comprises a trolley (701) which slides along the first line rail (103) or the second line rail (303), and the upper end of the trolley (701) is provided with a clamping cylinder (702), and the front end of the clamping cylinder (702) is provided with a chuck (703); the clamping cylinder (702) drives the chuck (703) to clamp the web of the workpiece (6).

5. The process for machining H-beam steel plasma beveling special machine according to claim 4, characterized in that: The cutting gun assembly (8) comprises a horizontal cross beam (801), a horizontal moving slider (802), a lifting arm (803), a first cutting gun head (804), and a second cutting gun head (805). The horizontal cross beam (801) is provided with two groups and is fixed at the inner side top of the first cutting torch operating chamber (4) and the second cutting torch operating chamber (5) respectively, two groups of horizontal moving sliders (802) are installed on the horizontal cross beam (801) at intervals, the horizontal moving sliders (802) slide along the horizontal cross beam (801), the bottom of the two groups of horizontal moving sliders (802) is hung with lifting arms (803) respectively, and the output ends of the two groups of lifting arms (803) are correspondingly provided with the first cutting torch head (804) and the second cutting torch head (805) respectively.

6. The process for machining H-beam steel plasma bevel special machine according to claim 5, characterized in that: The head end of the first cutting torch head (804) and the second cutting torch head (805) is respectively provided with a two-dimensional sensor tracking mechanism (9), and the two-dimensional sensor tracking mechanism (9) is composed of a sensor, a control system and an executing mechanism. The electronic sensor senses the distance of the workpiece (6), collects the straightness and height and transverse change signals of the workpiece (6), and through amplification and conversion of the controller, the horizontal moving slider (802) and the lifting arm (803) execute accurate follow-up of the cutting torch, so that the cutting torch is aligned with the bevel position of the workpiece (6), and the cutting process is realized without manual operation.

7. The process for machining H-beam steel plasma bevel special machine according to claim 6, characterized in that: The middle part of the first cutting torch operating chamber (4) and the second cutting torch operating chamber (5) is respectively provided with a conveying hole (401), and the top of the first cutting torch operating chamber (4) and the second cutting torch operating chamber (5) is respectively provided with a smoke collecting hole (402).

8. The process for machining H-beam steel plasma bevel special machine according to claim 1, characterized in that: In step four, when cutting the same kind of workpiece (6), the workpiece input workbench (101) of the workpiece input line (1) can again put the same kind of workpiece (6) to be processed after the workpiece (6) conveyed first enters the second cutting torch operating chamber (5) to carry out the second cutting process, and carries out the cutting process of the first cutting torch operating chamber (4), wherein the workpiece When the turnover line (2) is in a static state, the four cutting torches of the first cutting torch operating chamber (4) and the second cutting torch operating chamber (5) can simultaneously arc cutting, so as to improve the cutting efficiency.

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