Cutting equipment and method for steel box girder production

Abstract

The invention relates to the technical field of steel box girder production, in particular to cutting equipment and method for steel box girder production, comprising a support frame, a workbench, an auxiliary mechanism, a moving mechanism, a lifting mechanism, a pushing motor and a pushing screw rod, sliding blocks are arranged at both ends of the support frame, an adjusting groove is formed above the support frame, an adjusting block is arranged in the adjusting groove, and a cutting mechanism is arranged in the adjusting groove. An electric push rod is arranged on the outer side of the adjusting block, a cutting head is arranged at the output end of the electric push rod, a slag falling groove is formed in the middle of the workbench, the auxiliary mechanism comprises a slag scraping assembly and a connecting plate, the slag scraping assembly comprises a scraping plate, two supporting bases, a hydraulic push rod and two abutting blocks, telescopic rods are arranged in the abutting blocks, and a push plate is arranged at the output end of each telescopic rod. A first threaded groove is formed in the middle of the connecting plate, a to-be-cut piece is pushed through the push plate, the scraping plate abuts against the end face of the to-be-cut piece, chippings are scraped off, and finally after the to-be-cut piece is completely moved out of the workbench, the chippings are discharged through the chipping falling groove.

Description

Technical Field

[0001] The invention relates to the technical field of steel box girder production, and in particular to a cutting device and method for steel box girder production. Background Art

[0002] Steel box girders are a common structural form of steel bridges. They are usually assembled and welded from various steel plates. When cutting the steel plates of steel box girders, a mechatronic cutting machine is required. Mechatronic cutting machines are called CNC cutting machines, such as CNC plasma and flame cutting machines. They are driven by digital programs. As the machine moves, the cutting tools that come with them cut the object. Compared with manual and semi-automatic cutting methods, CNC cutting can effectively improve the efficiency and quality of plate cutting and reduce the labor intensity of operators.

[0003] The prior art patent CN118578006A discloses a steel plate cutting device for steel box girder construction, comprising a steel box girder body, wherein the steel box girder body is arranged on a supporting steel column, and two connecting fences are symmetrically arranged on the upper end surface of the steel box girder body, and a cutting mechanism is arranged between the two connecting fences; the cutting mechanism comprises two fixed seats arranged on the two connecting fences, and a support frame arranged on the two fixed seats, and a cutting assembly and a balancing assembly are arranged on the support frame, so that the center of gravity of the cutting assembly is always on the vertical center line of the support frame through the balancing assembly; the prior art improves the structure of the existing steel plate cutting device for steel box girder construction, and the improved steel plate cutting device for steel box girder construction can make the weight of the end with the cutting knife and the end without the cutting knife consistent when the cutting knife moves with the fixed plate, thereby avoiding the problem of the cutting knife tilting caused by the center of gravity shift during the movement, thereby avoiding affecting the cutting of the steel plate.

[0004] However, in the above-mentioned prior art, after the cutting assembly completes cutting of the workpiece, a lot of debris will remain on the surface of the workpiece, and these debris are usually cleaned by the staff using tools. This cleaning method is too time-consuming and labor-intensive, and is not convenient for completing the cleaning work quickly. Summary of the invention

[0005] The purpose of the present invention is to provide a cutting device and method for the production of steel box girders, so as to solve the technical problem in the prior art that after the cutting assembly completes the cutting of the workpiece, a large amount of debris will remain on the surface of the cut workpiece, and these debris are usually cleaned by the staff using tools. This cleaning method is too time-consuming and labor-intensive, and thus it is not convenient to complete the cleaning work quickly.

[0006] To achieve the above-mentioned purpose, the present invention provides a cutting device for steel box girder production, including a support frame, a workbench and an auxiliary mechanism, wherein sliders are provided at both ends of the support frame, an adjustment slot is provided above the support frame, an adjustment block is provided in the adjustment slot, an electric push rod is provided on the outside of the adjustment block, a cutting head is provided at the output end of the electric push rod, a slag dropping slot is provided in the middle of the workbench, slide slots are provided on both sides of the workbench, a moving mechanism is provided at one end of the workbench, a lifting mechanism is provided at the other end of the workbench, the slider is slidably connected to the workbench and is located in the corresponding slide slot, the auxiliary mechanism includes a slag scraping assembly and a connecting plate, and the slag scraping assembly includes a scraper and two A support seat, a hydraulic push rod is arranged above the support seat, a pushing motor is also arranged at the other end of the workbench, a pushing screw is arranged at the output end of the pushing motor, two abutting blocks are slidably arranged on the connecting plate, a telescopic rod is arranged in the abutting block, a push plate is arranged at the output end of the telescopic rod, a first thread groove is provided in the middle part of the connecting plate, the scraper is slidably connected with the corresponding support seat, and is located between the two support seats, and is also located at the output end of the hydraulic push rod, the two support seats are respectively fixedly connected with the workbench and are located on the workbench, the pushing screw is threadedly connected with the connecting plate and is located in the first thread groove, and the connecting plate is located in the slag dropping groove.

[0007] Among them, the auxiliary mechanism also includes a splash shield and two limit rods. The splash shield is fixedly connected to the electric push rod and is located at the output end of the electric push rod and is also located directly below the cutting head. The two limit rods are respectively fixedly connected to the workbench and are located in the slag trough. The connecting plate is slidably connected to the corresponding limit rods and is sleeved on the two limit rods.

[0008] Among them, the adjusting block is driven by an adjusting screw and an adjusting motor, the moving mechanism extends into the corresponding slide groove and drives the corresponding sliding block, the lifting mechanism extends to the upper end surface of the slag dropping trough, the supporting frame is located directly above the workbench, the output end of the hydraulic push rod extends into the supporting seat, and the pushing motor is located below the lifting mechanism.

[0009] Among them, the moving mechanism includes two moving screws, a belt body and a moving motor, a pulley is provided at one end of the moving screw, and a second thread groove is provided in the slider. The two moving screws are respectively rotatably connected to the workbench and are located in the corresponding slide groove, and the two moving screws are also respectively threadedly connected to the corresponding slider and are located in the second thread groove. The belt is transmission-connected to the corresponding pulley and is covered on the two pulleys. The moving motor is fixedly connected to the workbench and is located at one end of the workbench, and one of the moving screws is located at the output end of the moving motor.

[0010] Among them, the lifting mechanism includes two lifting plates, a bidirectional screw and a mounting seat, one end of the lifting plate has a third thread groove, one end of the bidirectional screw is provided with a rotating disk, the other end of the workbench has a through hole, the two lifting plates are respectively slidably connected to the workbench, and are symmetrically arranged in the through holes, and also extend into the slag dropping trough, the bidirectional screw is rotatably connected to the mounting seat and is located in the mounting seat, and the rotating disk extends to one end of the mounting seat, the bidirectional screw is also threadedly connected to the corresponding lifting plate, and is located in the third thread groove.

[0011] Wherein, the lifting mechanism further includes a plurality of rollers, and the plurality of rollers are rotatably connected to the corresponding lifting plates respectively and are located on the lifting plates.

[0012] The present invention also provides a cutting method for steel box girder production, which is applied to the above-mentioned cutting device for steel box girder production, and comprises the following steps: The workpiece to be cut is placed on the plurality of rollers, and then the bidirectional screw is rotated to drive the two lifting plates to be adjusted to a position away from the cutting head; The adjusting motor is started to drive the adjusting screw to adjust the cutting head to be just above the position where the workpiece needs to be cut, and then the electric push rod is started to push the cutting head down to approach the end face of the workpiece; The mobile motor is started to drive one of the mobile screws to rotate, and the other mobile screw is linked under the action of the belt body and the two pulleys. Based on the action of the second thread groove, the support frame is moved along the position where cutting is required, and the cutting head performs cutting operations at the same time.

[0013] The present invention provides a cutting device and method for producing steel box girders, comprising a support frame, a workbench and an auxiliary mechanism, wherein both ends of the support frame are provided with sliders, an adjustment slot is provided above the support frame, an adjustment block is provided in the adjustment slot, an electric push rod is provided on the outer side of the adjustment block, a cutting head is provided on the output end of the electric push rod, a slag dropping slot is provided in the middle of the workbench, slide slots are provided on both sides of the workbench, a moving mechanism is provided at one end of the workbench, a lifting mechanism is provided at the other end of the workbench, the auxiliary mechanism comprises a slag scraping assembly and a connecting plate, the slag scraping assembly comprises a scraper and two support seats, a hydraulic push rod is provided above the support seat, a pushing motor is also provided at the other end of the workbench, and a A push screw is provided, and two abutting blocks are slidably arranged on the connecting plate, a telescopic rod is arranged inside the abutting block, a push plate is provided at the output end of the telescopic rod, and a first thread groove is provided in the middle of the connecting plate, and one end of the cut piece is pushed by the push plate to move the cut piece toward the direction of the scraper, and the scraper is abutted against the end face of the cut piece to scrape off the debris, and finally after the cut piece is completely moved out of the workbench, the debris is discharged through the slag dropping groove, thereby effectively solving the technical problem that after the cutting assembly completes the cutting of the cut piece, a lot of debris will remain on the surface of the cut piece, and these debris are usually cleaned by the staff using tools, and this cleaning method is too time-consuming and labor-intensive, and thus it is not convenient to complete the cleaning work quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0015] Figure 1 It is a three-dimensional stereogram of the first embodiment of the present invention.

[0016] Figure 2 is a side view of the first embodiment of the present invention.

[0017] Figure 3 The present invention Figure 2 Section view along line AA.

[0018] Figure 4 The present invention Figure 3 Sectional view along line BB.

[0019] Figure 5 It is a three-dimensional stereogram of the second embodiment of the present invention.

[0020] Figure 6 It is a front view of the second embodiment of the present invention.

[0021] Figure 7The present invention Figure 6 Sectional view along the CC line.

[0022] Figure 8 It is a three-dimensional stereogram of the third embodiment of the present invention.

[0023] Fig. 9 is a side view of a third embodiment of the present invention.

[0024] Fig.10 The present invention Fig. 9 Sectional view along line DD.

[0025] Fig.11 The present invention is a flow chart of the steps of a cutting method for producing steel box girders.

[0026] 101-support frame, 102-workbench, 103-slider, 104-adjustment slot, 105-adjustment block, 106-electric push rod, 107-cutting head, 108-slag trough, 109-slide, 110-moving mechanism, 111-lifting mechanism, 112-connecting plate, 113-scraper, 114-support seat, 115-hydraulic push rod, 116-propelling motor, 117-propelling screw, 118-holding block, 119-telescopic rod, 120-push plate, 121-first thread groove, 122-splashproof Cover, 123-limit rod, 124-adjusting screw, 125-adjusting motor, 201-moving screw, 202-belt body, 203-moving motor, 204-pulley, 205-second thread groove, 206-lifting plate, 207-bidirectional screw, 208-mounting seat, 209-third thread groove, 210-rotating disk, 211-through hole, 212-roller, 301-reinforcement frame, 302-support leg, 303-anti-slip pad, 304-collecting plate, 305-conical bucket, 306-slag collecting frame. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0028] First embodiment: See also Figure 1~Figure 4 ,in Figure 1 is a three-dimensional stereogram of the first embodiment of the present invention, Figure 2 is a side view of a first embodiment of the present invention, Figure 3 The present invention Figure 2 The cross-sectional view along the AA line. Figure 4 The present invention Figure 3 Sectional view along line BB.

[0029] The present invention provides a cutting device for steel box girder production, comprising a support frame 101, a workbench 102 and an auxiliary mechanism, wherein sliders 103 are provided at both ends of the support frame 101, an adjustment slot 104 is provided above the support frame 101, an adjustment block 105 is provided in the adjustment slot 104, an electric push rod 106 is provided on the outer side of the adjustment block 105, a cutting head 107 is provided at the output end of the electric push rod 106, a slag dropping slot 108 is provided in the middle of the workbench 102, slide grooves 109 are provided on both sides of the workbench 102, a moving mechanism 110 is provided at one end of the workbench 102, and a lifting mechanism 111 is provided at the other end of the workbench 102, the slider 103 is slidably connected to the workbench 102 and is located in the corresponding slide groove 109, the downward movement distance of the cutting head 107 can be adjusted by the electric push rod 106, so as to facilitate cutting of cut pieces of different thicknesses, and the cutting head 107 adopts a laser beam cutting method.

[0030] According to the present specific embodiment, the auxiliary mechanism includes a scraping assembly and a connecting plate 112, the scraping assembly includes a scraper 113 and two support seats 114, a hydraulic push rod 115 is arranged above the support seat 114, a pushing motor 116 is arranged at the other end of the workbench 102, a pushing screw 117 is arranged at the output end of the pushing motor 116, two abutting blocks 118 are slidably arranged on the connecting plate 112, a telescopic rod 119 is arranged inside the abutting block 118, a pushing plate 120 is arranged at the output end of the telescopic rod 119, a first thread groove 121 is provided in the middle of the connecting plate 112, the scraper 113 is slidably connected with the corresponding support seat 114, and is located between the two support seats 114, and is also located at the output end of the hydraulic push rod 115, the two support seats 114 are respectively connected to the workbench 102 is fixedly connected and located on the workbench 102, the pushing screw 117 is threadedly connected to the connecting plate 112 and is located in the first thread groove 121, and the connecting plate 112 is located in the slag trough 108, and one end of the cut piece is pushed by the pushing plate 120 to move the cut piece toward the scraper 113, and the scraper 113 is against the end face of the cut piece to scrape off the debris, and finally after the cut piece is completely moved out of the workbench 102, the debris is discharged through the slag trough 108, thereby effectively solving the technical problem that after the cutting assembly completes the cutting of the cut piece, a lot of debris will remain on the surface of the cut piece, and these debris are usually cleaned by the staff using tools, and this cleaning method is too time-consuming and labor-intensive, thereby not convenient for completing the cleaning work quickly.

[0031] Among them, the auxiliary mechanism also includes a splash shield 122 and two limit rods 123. The splash shield 122 is fixedly connected to the electric push rod 106 and is located at the output end of the electric push rod 106, and is also located directly below the cutting head 107. The two limit rods 123 are respectively fixedly connected to the workbench 102 and are located in the slag trough 108. The connecting plate 112 is slidably connected to the corresponding limit rods 123 and is sleeved on the two limit rods 123. The splash shield 122 can facilitate the shielding of sparks and debris generated by the cutting head 107 during cutting, thereby facilitating subsequent collection.

[0032] Secondly, the adjusting block 105 is driven by the adjusting screw 124 and the adjusting motor 125, the moving mechanism 110 extends into the corresponding slide groove 109 and drives the corresponding slider 103, the lifting mechanism 111 extends to the upper end surface of the slag trough 108, the supporting frame 101 is located directly above the workbench 102, the output end of the hydraulic push rod 115 extends into the supporting seat 114, and the pushing motor 116 is located below the lifting mechanism 111. Through the adjusting screw 124 and the adjusting motor 125, the displacement distance of the adjusting block 105 can be easily adjusted, so as to facilitate the control of the cutting position.

[0033] When using a cutting device for steel box girder production of this embodiment, after the cutting head 107 completes the cutting operation on the workpiece to be cut, the workpiece to be cut is first pushed to move it to the bottom of the scraper 113, and then the hydraulic push rod 115 is started to press the scraper 113 downward, and the scraper 113 is held against the upper end surface of the workpiece to be cut. At this time, there is a gap between the workpiece to be cut and the workbench 102, and the telescopic rod 119 is started to push the telescopic rod 119 upward. The push plate 120 is moved to the gap, and the pushing motor 116 is started at the same time, so that the pushing motor 116 drives the pushing screw 117. The connecting plate 112 moves toward the other end of the workbench 102 under the action of the first thread groove 121, and the push plate 120 pushes the cut piece to move, and the scraper 113 scrapes off the debris. Finally, after the cut piece completely leaves the workbench 102, the debris all falls into the slag trough 108.

[0034] Second embodiment: Based on the first embodiment, please refer to Figure 5~Figure 7 ,in Figure 5 is a three-dimensional stereogram of a second embodiment of the present invention, Figure 6 is a front view of a second embodiment of the present invention, Figure 7 The present invention Figure 6Sectional view along the CC line.

[0035] The present invention provides a cutting device for steel box girder production, wherein the moving mechanism 110 comprises two moving screws 201, a belt body 202 and a moving motor 203, a pulley 204 is arranged at one end of the moving screw 201, a second thread groove 205 is arranged in the slider 103, the two moving screws 201 are respectively connected to the workbench 102 for rotation and are located in the corresponding slide groove 109, and the two moving screws 201 are also respectively connected to the corresponding slider 103 for threading and are located in the second thread groove 205, the belt is connected to the corresponding pulley 204 for transmission and covers On the two pulleys 204, the mobile motor 203 is fixedly connected to the workbench 102 and is located at one end of the workbench 102, and one of the mobile screws 201 is located at the output end of the mobile motor 203. By starting the mobile motor 203, one of the mobile screws 201 is driven to rotate, and the other mobile screw 201 is linked under the action of the belt body 202 and the two pulleys 204. Based on the action of the second thread groove 205, the support frame 101 is moved along the position where cutting is required, and the cutting head 107 performs the cutting operation at the same time.

[0036] The lifting mechanism 111 includes two lifting plates 206, a bidirectional screw and a mounting seat 208, one end of the lifting plate 206 has a third thread groove 209, one end of the bidirectional screw is provided with a rotating disk 210, the other end of the workbench 102 has a through hole 211, the two lifting plates 206 are respectively slidably connected to the workbench 102, and are symmetrically arranged in the through holes 211, and also extend into the slag trough 108, the bidirectional screw is rotatably connected to the mounting seat 208, and is located on the mounting seat 2 08, and the rotating disk 210 extends to one end of the mounting seat 208, the bidirectional screw is also threadedly connected with the corresponding lifting plate 206, and is located in the third thread groove 209. By rotating the bidirectional screw clockwise, the bidirectional screw drives the two lifting plates 206, and the two lifting plates 206 move in a direction approaching each other under the action of the third thread groove 209, so that the lifting plates 206 can be prevented from being located directly under the cutting head 107 while supporting the cut piece.

[0037] Secondly, the lifting mechanism 111 also includes a plurality of rollers 212, which are rotatably connected to the corresponding lifting plates 206 and are located on the lifting plates 206. The rollers 212 can improve the stability and smoothness of the two lifting plates 206 when moving.

[0038] When using a cutting device for steel box girder production according to the present embodiment, the moving motor 203 is started to drive one of the moving screws 201 to rotate, and the other moving screw 201 is linked under the action of the belt body 202 and the two pulleys 204. Based on the action of the second thread groove 205, the support frame 101 is moved along the position where cutting is required, and at the same time, the cutting head 107 performs the cutting operation, and the bidirectional screw is rotated clockwise so that the bidirectional screw drives the two lifting plates 206. The two lifting plates 206 are moved in a direction approaching each other under the action of the third thread groove 209, so that the lifting plates 206 can be supported while avoiding being located directly under the cutting head 107. The roller 212 can facilitate improving the stability and smoothness of the two lifting plates 206 when moving.

[0039] Third embodiment: The cutting device for steel box girder production further includes a supporting mechanism and a collecting mechanism. The supporting mechanism is arranged on the outside of the workbench 102 , and the collecting mechanism is arranged below the workbench 102 .

[0040] The support mechanism includes a reinforcement frame 301 and multiple support legs 302, and an anti-slip pad 303 is arranged under the support leg 302. The reinforcement frame 301 is fixedly connected to the corresponding support leg 302 and is sleeved on the multiple support legs 302. The multiple support legs 302 are respectively fixedly connected to the workbench 102 and are located on the outside of the workbench 102.

[0041] The collecting mechanism includes a collecting plate 304 and a conical bucket 305, a slag collecting frame 306 is arranged below the conical bucket 305, the collecting plate 304 is slidably connected to the slag collecting frame 306 and is located inside the slag collecting frame 306, the conical head is fixedly connected to the workbench 102 and is located below the workbench 102, and is also located directly below the slag dropping trough 108.

[0042] Based on the second embodiment, please refer to Figure 8~Figure 10 ,in Figure 8 is a three-dimensional stereogram of a third embodiment of the present invention, Fig. 9 is a side view of a third embodiment of the present invention, Fig.10 The present invention Fig. 9 Sectional view along line DD.

[0043] The present invention provides a cutting device for steel box girder production, which also includes a supporting mechanism and a collecting mechanism. The supporting mechanism is arranged on the outside of the workbench 102 , and the collecting mechanism is arranged below the workbench 102 .

[0044] Among them, the supporting mechanism includes a reinforcement frame 301 and a plurality of supporting legs 302, and an anti-slip pad 303 is arranged under the supporting leg 302. The reinforcement frame 301 is fixedly connected to the corresponding supporting leg 302 and is sleeved on the plurality of supporting legs 302. The plurality of supporting legs 302 are respectively fixedly connected to the workbench 102 and are located on the outside of the workbench 102. The reinforcement frame 301 can be used to improve the stability of the plurality of supporting legs 302, so that the plurality of supporting legs 302 can better support the workbench 102.

[0045] Secondly, the collecting mechanism includes a collecting tray 304 and a conical bucket 305, a slag collecting frame 306 is arranged below the conical bucket 305, the collecting tray 304 is slidably connected to the slag collecting frame 306 and is located in the slag collecting frame 306, the conical head is fixedly connected to the workbench 102 and is located below the workbench 102, and is also located directly below the slag trough 108, the debris dropped from the slag trough 108 is guided into the slag trough by the conical bucket 305, and finally collected by the collecting tray 304, so as to facilitate the centralized processing of the debris.

[0046] When using a cutting device for steel box girder production according to this embodiment, the reinforcement frame 301 can be used to improve the stability of the multiple support legs 302, so that the multiple support legs 302 can better support the workbench 102. The conical bucket 305 guides the debris falling from the slag trough 108 into the slag collecting trough, and finally collects it through the collection plate 304, so as to facilitate centralized processing of the debris.

[0047] Based on the third embodiment, please refer to Fig.11 ,in Fig.11 The present invention is a flow chart of the steps of a cutting method for producing steel box girders.

[0048] The present invention also provides a cutting method for steel box girder production, which is applied to the above-mentioned cutting device for steel box girder production, and comprises the following steps: S1: placing the workpiece to be cut on the plurality of rollers 212, and then rotating the bidirectional screw to drive the two lifting plates 206 to adjust to a position away from the cutting head 107; S2: Start the adjusting motor 125 to drive the adjusting screw 124, adjust the cutting head 107 to the position just above the required cutting position of the workpiece, and then start the electric push rod 106 to push the cutting head 107 down to the end surface of the workpiece; S3: Start the moving motor 203 to drive one of the moving screws 201 to rotate, and the other moving screw 201 is linked under the action of the belt body 202 and the two pulleys 204. Based on the action of the second thread groove 205, the support frame 101 is moved along the position where cutting is required, and the cutting head 107 performs the cutting operation at the same time.

[0049] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A cutting device for steel box girder production, comprising a support frame and a workbench, wherein both ends of the support frame are provided with sliders, an adjustment slot is provided above the support frame, an adjustment block is provided in the adjustment slot, an electric push rod is provided on the outer side of the adjustment block, a cutting head is provided at the output end of the electric push rod, a slag dropping slot is provided in the middle of the workbench, both sides of the workbench are provided with slide slots, a moving mechanism is provided at one end of the workbench, a lifting mechanism is provided at the other end of the workbench, the slider is slidably connected with the workbench and is located in the corresponding slide slot, characterized in that It also includes auxiliary institutions; The auxiliary mechanism includes a scraping assembly and a connecting plate, the scraping assembly includes a scraper and two support seats, a hydraulic push rod is arranged above the support seat, a pushing motor is also arranged at the other end of the workbench, a pushing screw is arranged at the output end of the pushing motor, two abutting blocks are slidably arranged on the connecting plate, a telescopic rod is arranged in the abutting block, a pushing plate is arranged at the output end of the telescopic rod, a first thread groove is provided in the middle part of the connecting plate, the scraper is slidably connected with the corresponding support seat, and is located between the two support seats, and is also located at the output end of the hydraulic push rod, the two support seats are respectively fixedly connected to the workbench and are located on the workbench, the pushing screw is threadedly connected to the connecting plate and is located in the first thread groove, and the connecting plate is located in the slag dropping groove.

2. The cutting device for steel box girder production according to claim 1, characterized in that: The auxiliary mechanism also includes a splash shield and two limit rods. The splash shield is fixedly connected to the electric push rod and is located at the output end of the electric push rod and is also located directly below the cutting head. The two limit rods are respectively fixedly connected to the workbench and are located in the slag dropping trough. The connecting plate is slidably connected to the corresponding limit rods and is sleeved on the two limit rods.

3. The cutting device for steel box girder production according to claim 2, characterized in that: The adjusting block is driven by an adjusting screw and an adjusting motor, the moving mechanism extends into the corresponding slide groove and drives the corresponding sliding block, the lifting mechanism extends to the upper end surface of the slag dropping groove, the supporting frame is located directly above the workbench, the output end of the hydraulic push rod extends into the supporting seat, and the pushing motor is located below the lifting mechanism.

4. The cutting device for steel box girder production according to claim 3, characterized in that: The moving mechanism includes two moving screws, a belt body and a moving motor, a pulley is provided at one end of the moving screw, a second thread groove is provided in the slider, the two moving screws are respectively rotatably connected to the workbench and are located in the corresponding slide groove, and the two moving screws are also respectively threadedly connected to the corresponding slider and are located in the second thread groove, the belt is transmission-connected to the corresponding pulley and is covered on the two pulleys, the moving motor is fixedly connected to the workbench and is located at one end of the workbench, and one of the moving screws is located at the output end of the moving motor.

5. The cutting device for steel box girder production according to claim 4, characterized in that: The lifting mechanism includes two lifting plates, a bidirectional screw and a mounting seat, one end of the lifting plate has a third thread groove, one end of the bidirectional screw is provided with a rotating disk, the other end of the workbench has a through hole, the two lifting plates are respectively slidably connected to the workbench, and are symmetrically arranged in the through holes, and also extend into the slag dropping trough, the bidirectional screw is rotatably connected to the mounting seat and is located in the mounting seat, and the rotating disk extends to one end of the mounting seat, the bidirectional screw is also threadedly connected to the corresponding lifting plate, and is located in the third thread groove.

6. The cutting device for steel box girder production according to claim 5, characterized in that: The lifting mechanism further includes a plurality of rollers, which are rotatably connected to the corresponding lifting plates and are located on the lifting plates.

7. A cutting method for steel box girder production, applied to the cutting device for steel box girder production as claimed in claim 6, characterized in that: The steps include: The workpiece to be cut is placed on the plurality of rollers, and then the bidirectional screw is rotated to drive the two lifting plates to be adjusted to a position away from the cutting head; The adjusting motor is started to drive the adjusting screw to adjust the cutting head to be just above the position where the workpiece needs to be cut, and then the electric push rod is started to push the cutting head down to approach the end face of the workpiece; The mobile motor is started to drive one of the mobile screws to rotate, and the other mobile screw is linked under the action of the belt body and the two pulleys. Based on the action of the second thread groove, the support frame is moved along the position where cutting is required, and the cutting head performs cutting operations at the same time.

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