CN210633137U

CN210633137U - Laser flying shear device for stainless steel plate

Info

Publication number: CN210633137U
Application number: CN201921797560.9U
Authority: CN
Inventors: 王骏; 费永强; 徐侨
Original assignee: Zhejiang Baohong New Material Co ltd
Current assignee: Zhejiang Baohong New Material Co ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-05-29
Anticipated expiration: 2029-10-24

Abstract

The embodiment of the application discloses a laser flying shear device for a stainless steel plate, which comprises a workbench, a movable gantry laser cutting frame and a gantry positioning mechanism; a group of speed-regulating pressing pieces are respectively arranged at the front end and the rear end of the top of the workbench; each group of the speed-regulating pressing pieces comprises an upper pressing roll group and a lower pressing roll group; the workbench comprises a base and a pressing frame above the base, and the pressing frame is connected with the base through a tightness adjusting assembly; the movable gantry laser cutting frame comprises a gantry frame, a laser head longitudinal moving assembly and a laser cutting head assembly; the laser head moves the subassembly vertically including drive division, guide portion and with the installation department that guide portion slide and link to each other. The laser flying shear device for the stainless steel plate has the advantages that the stainless steel plate is extended and pressed through the speed-regulating pressing piece, the stainless steel plate can be kept flat when being cut, and flying shear precision of the flying shear device is improved.

Description

Laser flying shear device for stainless steel plate

Technical Field

The application relates to the technical field of metal plate processing equipment, in particular to a laser flying shear device for a stainless steel plate.

Background

In the processing technology of stainless steel plate, in order to adapt to multiple production needs, can cut into the stainless steel of polylith size less relatively and then carry out further processing to monoblock stainless steel plate usually, when stainless steel plate cuts, need unreel the back with the stainless steel plate of lapping, cut stainless steel plate through stainless steel plate cutting equipment.

In the stainless steel plate flying shear device in the prior art, when the uncoiled stainless steel plate is cut, the uncoiled stainless steel has bending inertia. And the cutting of the bent stainless steel plate can cause the difference between the cutting size of the stainless steel plate and the standard cutting size, so that the cutting precision of the flying shear device is reduced. In the prior art, after the flying shear device finishes cutting, the stainless steel plate is precisely cut to the size through a fine machining step to meet further production requirements, so that the production efficiency is greatly reduced, and the waste of the raw materials of the stainless steel plate can be caused. Therefore, a flying shear device for stainless steel plates with high cutting precision is needed to meet the production requirements.

The information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above-mentioned technical problem, a corrosion resistant plate laser flying shear device is provided, and corrosion resistant plate compresses tightly the extension of piece through the speed governing and presses the effect, makes corrosion resistant plate remain the leveling condition all the time on the workstation, places the problem appearance of the cutting size that the corrosion resistant plate unevenness caused and standard size difference, improves the flying shear precision.

In order to realize the aim, the utility model provides a laser flying shear device for stainless steel plates, which comprises a workbench, a movable gantry laser cutting frame and a gantry positioning mechanism; a group of speed-regulating pressing pieces are respectively arranged at the front end and the rear end of the top of the workbench; each group of the speed-regulating pressing pieces comprises an upper pressing roll group and a lower pressing roll group; the workbench comprises a base and a pressing frame above the base, and the pressing frame is connected with the base through a tightness adjusting assembly; the upper pressing roller group is fixedly connected with the pressing frame, and the lower pressing roller group is fixed with the top of the base; the movable gantry laser cutting frame comprises a gantry frame, a laser head longitudinal moving assembly and a laser cutting head assembly; the laser head longitudinal movement assembly comprises a driving part, a guiding part and a mounting part connected with the guiding part in a sliding manner; the driving part is connected with the mounting part; the guide part with the portal frame is fixed, the installation department with laser cutting head subassembly top is fixed.

Based on above-mentioned structure, set up two sets of speed governing pressing parts on the workstation, make corrosion resistant plate after getting into the flying shear device, through last compression roller group and the extension of lower roller set press become level and smooth, prevent that the problem that the actual cutting size that results in after the corrosion resistant plate bending appears in the flying shear device from deviating with standard cutting size, improve subsequent flying shear precision.

Preferably, the upper compression roller group in each group of speed-regulating pressing pieces comprises a plurality of upper compression rollers and upper compression roller driving motors which are arranged in parallel, the upper compression rollers are driven by the upper compression roller driving motors to rotate at a lower speed, and the upper compression roller driving motors are fixed with the compression frame; each group of speed regulation pressing part is arranged in the lower pressing roller group and comprises a plurality of lower pressing rollers arranged in parallel and a lower pressing roller driving motor, and the lower pressing rollers are driven by the lower pressing roller driving motor to rotate in a speed regulation mode.

Furthermore, through the respective speed regulation of the two groups of speed regulation pressing parts, the problem that stainless steel plates between the two groups of speed regulation pressing parts are raised or piled is avoided, the stainless steel plates are in a flat and tensioned state on the workbench, the feeding effect of the flying shear device in working is further ensured, and the flying shear precision of products is further improved.

Preferably, the tightness adjusting assembly comprises a lifting screw rod, a lifting screw rod driving motor and a lifting nut seat; the lifting screw rod driving motor is fixed with the top of the base; the lifting nut seat is matched with the lifting screw rod and fixed with the pressing frame.

Furthermore, the pressing frame is driven to ascend and descend through the lifting screw rod, the upper pressing roller ascends or descends along the lifting screw rod under the driving of the pressing frame, the precision of adjusting the distance between the upper pressing roller group and the lower pressing roller group is improved, the leveling effect of the stainless steel plate is better when the stainless steel plate passes through the speed-adjusting pressing piece, and the flying shear precision in flying shear is further improved.

Preferably, the top of the workbench is also provided with a jacking piece, and the jacking piece is arranged between the two groups of speed-regulating pressing pieces; the top supporting piece is fixed with the top of the base, and the top surface of the top supporting piece is flush with the top of the lower pressing roller group.

Furthermore, through the arrangement of the jacking piece, when the stainless steel plate enters between the two groups of speed-regulating pressing pieces, one side of the end part of the stainless steel plate firstly enters the jacking range of the jacking piece, and the contact surface of the stainless steel plate and the jacking piece is larger and larger along with feeding; similarly, when the stainless steel plate is cut, the well-cut end part can not sink under the jacking of the jacking piece, meanwhile, the uncut part keeps flat under the action of self force, along with the cutting, the stainless steel plate after the cutting is finished enters into the next part of speed regulation pressing piece, the problem that the end part of the stainless steel plate sinks in the feeding process and the cutting process is avoided, the flatness of the stainless steel plate is ensured, and further the flying shear precision of the laser flying shear device for the stainless steel plate is improved.

Preferably, the jacking piece comprises a plurality of cushion blocks which are detachably connected; at least one side surface of the cushion block is provided with a clamping groove, and at least one side surface of the cushion block is provided with a clamping connector; the clamping head is matched with the clamping groove.

Further, through the structure setting of cushion, can make the cushion constitute the top support piece of different structural morphology according to the demand of cutting shape, prevent that the laser of laser cutting portion from causing the damage to the top support piece, and through the setting in joint head and joint groove, improved the convenient to use of cushion.

Preferably, the gantry positioning mechanism comprises a transverse moving guide rail, a transverse moving slide block, a transverse moving nut seat, a transverse moving screw rod driving motor and an installation frame; the transverse moving guide rail is arranged at the lower part of the base; the transverse moving slide block is fixed with the bottom of the portal frame; the transverse moving nut seat is fixedly connected with the portal frame; the transverse moving screw rod is matched with the transverse moving nut seat; and two ends of the transverse moving screw rod are respectively connected with the mounting frame and the transverse moving screw rod driving motor.

Preferably, the traversing guide rail is further provided with a proximity switch, the proximity switch is in communication connection with a PLC (programmable logic controller), the proximity switch is in contact with the portal frame and then sends an instruction to the PLC, and the PLC receives the instruction and then controls the traversing screw rod driving motor to stop driving the traversing screw rod to rotate. .

Based on the structural arrangement of the portal frame and the workbench, the laser cutting head assembly is driven by the laser head longitudinal moving assembly and the portal positioning mechanism, flying shears are arranged between the two groups of speed-regulating pressing pieces for the stainless steel plate according to the set motion path, and through the arrangement of the positioning block, the control efficiency of displacement of the portal frame along the length direction of the workbench is improved, so that the working efficiency of the flying shear device is improved

In summary, the laser flying shear device for the stainless steel plate, provided by the application, enables the stainless steel plate to be flattened before cutting through the arrangement of the speed-regulating pressing pieces, and the stainless steel plate keeps a tensioning state between the two groups of speed-regulating pressing pieces under respective speed regulation of the upper pressing roller group and the lower pressing roller group; and through the setting of the jacking piece, the tip of the stainless steel plate is prevented from sinking between the two groups of speed-regulating pressing pieces, the stainless steel plate is always kept in a high-flatness state on the cutting workbench, and the flying shear precision is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a laser flying shear device for stainless steel plates according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a workbench of a laser flying shear device for stainless steel plates according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a cushion block of a laser flying shear device for a stainless steel plate according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a gantry positioning mechanism of a laser flying shear device for stainless steel plates according to an embodiment of the present application;

reference numerals of the above figures: 100-workbench, 101-base, 102-pressing frame, 103-tightness adjusting assembly, 1031-lifting screw rod, 1032-lifting screw rod driving motor, 110-speed-adjusting pressing piece, 111-upper pressing roller set, 1111-upper pressing roller, 1112-upper pressing roller driving motor, 112-lower pressing roller set, 1121-lower pressing roller, 1122-lower pressing roller driving motor, 200-movable gantry laser cutting frame, 210-gantry frame, 220-laser head longitudinal moving assembly, 221-driving part, 222-guiding part, 223-mounting part, 230-laser cutting head assembly, 300-gantry positioning mechanism, 301-transverse moving guide rail, 302-transverse moving slide block, 303-transverse moving nut seat, 304-transverse moving screw rod, 305-transverse moving screw rod driving motor, 306-mounting frame, 307-positioning block, 308-PLC controller, 400-jacking piece, 410-cushion block, 411-clamping groove and 412-clamping joint.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Example (b): referring to fig. 1, the laser flying shear device for stainless steel plates comprises a worktable 100, a movable gantry laser cutting frame 200 and a gantry positioning mechanism 300. In particular, the present invention relates to a method for producing,

a group of speed-regulating pressing pieces 110 are respectively arranged at the front end and the rear end of the top of the workbench 100; each group of speed-regulating pressing pieces 110 comprises an upper pressing roller group 111 and a lower pressing roller group 112; the workbench 100 comprises a base 101 and a pressing frame 102 above the base 101, and the pressing frame 102 is connected with the base 101 through a tightness adjusting assembly 103; the upper press roll group 111 is fixedly connected with the press frame 102, and the lower press roll group 112 is fixed with the top of the base 101. The advantage that sets up like this is, set up two sets of speed governing on the workstation and compress tightly piece 110, makes the corrosion resistant plate get into the flying shear device after, and the extension pressure through last compression roller group 111 becomes level and smooth with lower roll group 112, prevents that the corrosion resistant plate from appearing the problem that the actual cutting size that leads to after the bending takes place the deviation with standard cutting size in the flying shear device, improves subsequent flying shear precision.

As shown in fig. 1 and fig. 2, as a preferred implementation manner of this embodiment, the upper press roll group 111 in each group of speed-regulating pressing members 110 includes a plurality of upper press rolls 1111 and an upper press roll driving motor 1112 arranged in parallel, the upper press rolls 1111 rotate at a speed-regulating speed under the driving of the upper press roll driving motor 1112, and the upper press roll driving motor 1112 is fixed to the press frame 102; the lower compression roller set 112 in each set of speed-regulating compression element 110 includes a plurality of lower compression rollers 1121 and lower compression roller driving motors 1122 which are arranged in parallel, and the lower compression rollers 1121 rotate at a speed regulated under the driving of the lower compression roller driving motors 1122. The upper pressing roll 1111, the upper pressing roll driving motor 1112, the lower pressing roll 1121 and the lower pressing roll driving motor 1122 are all based on the prior art, one end of the upper pressing roll 1111 is connected with the motor output end of the upper pressing roll driving motor 1112 through a belt, the other end of the upper pressing roll 1111 is rotatably connected with the pressing frame 102 through a rotating bearing, and the upper pressing roll 1111 rotates at a speed under the driving of the upper pressing roll driving motor 1112; one end of the lower pressure roller 1121 is connected to the motor output end of the lower pressure roller driving motor 1122 through a belt, the other end of the lower pressure roller 1121 is rotatably connected to the base 101 through a rotating bearing, and the lower pressure roller 1121 rotates in the direction opposite to that of the upper pressure roller 1111 under the speed-adjusting driving of the lower pressure roller driving motor 1122. The stainless steel sheet is fed into the table 100 by the driving of the upper press roller 1111 and the lower press roller 1121. The advantage that sets up like this is, through the speed governing respectively of two sets of speed governing pressing parts 110, avoids two sets of speed governing pressing parts 110 within a definite time corrosion resistant plate to appear uplift or accumulational problem, makes corrosion resistant plate be in the state of leveling the tensioning on the workstation, further guarantees the pay-off effect of flying shear device at the during operation, and then improves the flying shear precision of product.

In this embodiment, the slack adjuster assembly 103 includes a lift screw 1031, a lift screw driving motor 1032, and a lift nut holder 1033; the lifting screw rod driving motor 1032 is fixed with the top of the base 101; the lift nut holder 1033 is engaged with the lift screw 1031 and fixed to the pressure frame 102. The lifting screw 1031, the lifting screw driving motor 1032 and the lifting nut seat 1033 are all based on the prior art, the motor base of the lifting screw driving motor 1032 is fixed with the base in a threaded manner, and the lifting nut seat 1033 is fixed with the pressing frame 102 in a threaded manner. In a working state, the pressing frame 102 is driven by the lifting screw 1031 to ascend or descend, the upper pressing roller 1111 is driven by the pressing frame 102 to ascend or descend along the lifting screw 1031, so that the distance between the upper pressing roller 1111 and the lower pressing roller 1121 is kept at a proper position, and the stainless steel plate is rolled and flattened. The benefit that sets up like this is, drives the pressure frame 102 that goes up and down through the lift lead screw 1031, makes the top compression roller 1111 rise or descend along the lift lead screw 1031 under the drive of pressure frame 102, has improved the precision of interval adjustment between top compression roller set 111 and the bottom compression roller set 112, makes the stainless steel board level and smooth the effect when the piece is compressed tightly through the speed governing better, and then has improved the flying shear precision when flying shear.

As a preferred implementation manner of this embodiment, the top of the workbench 100 is further provided with a jacking member 400, and the jacking member 400 is disposed between the two groups of speed-regulating pressing members 110; the top holder 400 is fixed to the top of the base 101, and the top surface of the top holder 400 is flush with the top of the lower compression roller set 112. The jacking piece 400 is fixed with the top of the base in a threaded mode, and in work, the stainless steel plate enters the jacking piece 400 which is flush with the top of the lower pressing roller group 112 to jack after being discharged by the lower pressing roller group 112 which is arranged in front in the feeding direction. Through the arrangement of the jacking piece 400, when the stainless steel plate enters between the two groups of speed-regulating pressing pieces 110, one side of the end part of the stainless steel plate firstly enters the jacking range of the jacking piece, and along with feeding, the contact surface of the stainless steel plate and the jacking piece 400 is larger and larger; similarly, when the stainless steel plate is cut, the cut end part can not sink under the jacking of the jacking piece 400, meanwhile, the uncut part keeps flat under the action of self force, along with the cutting, the cut stainless steel plate enters the speed-regulating pressing piece 110 of the next part, the problem that the end part of the stainless steel plate sinks in the feeding process and the cutting process is avoided, the flatness of the stainless steel plate is ensured, and the flying shear precision of the laser flying shear device for the stainless steel plate is further improved.

In this embodiment, referring to fig. 3, the jacking member 400 comprises a plurality of detachably coupled pads 410; at least one side surface of the cushion block 410 is provided with a clamping groove 411, and at least one side surface is provided with a clamping connector 412; the card connector 412 is fitted with the card slot 411. The top holder 400 may be formed by splicing a plurality of cushion blocks 410, and the cushion blocks 410, the clamping grooves 411 and the clamping connectors 412 are all based on the prior art. The benefit that sets up like this is, through the structure setting of cushion 410, can make cushion 410 constitute the top of different structural morphology and hold in the palm piece 400 according to the demand of cutting the shape, prevents that the laser of laser cutting portion from causing the damage to top support piece 400, and through the setting of joint 412 and joint groove 411, has improved cushion 410's convenience in use.

Referring to fig. 1 and 4, the movable gantry laser cutting frame 200 includes a gantry 210, a laser head longitudinal movement assembly 220, and a laser cutting head assembly 230; the laser head longitudinal movement assembly 220 comprises a driving part 221, a guide part 222 and a mounting part 223 connected with the guide part 222 in a sliding way; the driving part 221 is connected with the mounting part 223; the guiding portion 222 is fixed to the gantry 210, and the mounting portion 222 is fixed to the top of the laser cutting head assembly 230. The drive portion 221, guide portion 222, mounting portion 223, laser cutting head assembly 230 may be of a construction commonly used in the art, such as: the driving part 221 is a chain transmission assembly in the prior art, the guiding part 222 is a guide rail arranged on the gantry 210 along the width direction of the workbench, the mounting part 223 is a slider matched with the guide rail, and the laser cutting head assembly 230 is a laser cutting head and a cable. The guiding portion 222 is disposed on one side of the gantry 210 facing the top of the worktable 100, the mounting portion 223 is screwed with the laser cutting head of the laser cutting head assembly 230 for fixing, and the mounting portion 223 is disposed with teeth engaged with the chain of the chain transmission assembly. The laser cutting head assembly 230 is moved along the guide portion 222 by the driving portion 221 through the engagement of the teeth on the mounting portion 223 with the chain. The advantage of this arrangement is that the structural arrangement of the gantry 210, the driving part 221, the guiding part 222 and the mounting part 223 improves the stability of the laser cutting head assembly 230 in the moving process, and further improves the flying shear precision of the flying shear device.

As a preferred implementation manner of this embodiment, the gantry positioning mechanism 300 includes a traverse guide 301, a traverse slider 302, a traverse nut seat 303, a traverse screw 304, a traverse screw driving motor 305, and a mounting rack 306; the traverse guide 301 is arranged at the lower part of the base 101; the traversing slide block 302 is fixed with the bottom of the portal frame 210; the traversing nut seat 303 is fixedly connected with the portal frame 210; the transverse moving screw rod 304 is matched with the transverse moving nut seat 303; the two ends of the traverse screw 304 are connected with the mounting frame 306 and the traverse screw driving motor 305, respectively. The traverse guide 301, the traverse slider 302, the traverse nut seat 303, the traverse screw 304, the traverse screw driving motor 305, and the mounting bracket 306 are based on the prior art, the traverse guide 301 is screwed to the base 101 along the longitudinal direction of the table 100 to be fixed, the traverse slider 302 is screwed to the gantry 210 to be fixed, and the traverse nut seat 303 is screwed to the lower portion of the gantry 210. The traversing nut seat 303 is driven by the traversing screw rod 304, and the gantry 210 is driven by the traversing nut seat 303 to reciprocate along the traversing guide rail 301.

In this embodiment, the traverse guide 301 is further provided with a proximity switch 307, the proximity switch 307 is in communication with the PLC controller 308, the proximity switch 307 sends a command to the PLC controller 308 after contacting the gantry 210, and the PLC controller 308 controls the traverse screw driving motor 305 to stop driving the traverse screw 304 to rotate after receiving the command. The proximity switch 307 and the PLC controller 308 are based on the prior art.

Based on the structural arrangement of the gantry 210 and the workbench 100, the laser cutting head assembly 230 is driven by the laser head longitudinal movement assembly 220 and the gantry positioning mechanism 300, flying shears are carried out on the stainless steel plate between the two groups of speed-regulating pressing pieces 110 according to a set movement path, and through the arrangement of the positioning block 307, the control efficiency of displacement of the gantry 210 along the length direction of the workbench 100 is improved, so that the working efficiency of the flying shear device is improved.

The working principle is as follows: before the flying shear device works, the distance between the upper press roll group 111 and the lower press roll group 112 is adjusted through the tightness adjusting assembly 103, so that the distance between the upper press roll 1111 and the lower press roll 1121 is the same as the thickness of the stainless steel plate. In operation, the stainless steel plate is fed toward the table 100 in the feeding direction by the driving of the upper pressing roller 1111 and the lower pressing roller 1121, and the bent portion of the stainless steel plate is gradually flattened under the extension pressure of the upper pressing roller 1111 and the lower pressing roller 1121. Under the speed-regulating driving of the upper pressing roll 1111 and the lower pressing roll 1121, the stainless steel plate is prevented from being bulged due to the fact that the feeding speed of the stainless steel plate is not uniform in the flying shear device, and further deviation between the actual cutting size and the standard cutting size is caused. When the stainless steel plate is first inserted between the two sets of speed-adjusting pressing members 110, the end portions thereof are supported by the jacking of the jacking members 400. When the feeding length of the stainless steel plate meets the cutting size, the laser cutting head assembly 230 moves along the guide portion 222 and the traverse guide 301 under the setting of the moving speed of the gantry 210 along the length direction of the table 100 and the moving speed of the gantry 210 to the laser cutting head assembly 230 in the width direction of the table 100, and the stainless steel plate with accurate size is cut as required. The cut steel sheet is sent out of the flying shear device under the driving of a speed regulation pressing piece 110 arranged behind along the feeding direction.

The foregoing description is for the purpose of illustration and is not for the purpose of limitation. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego the subject matter and should not be construed as an admission that the applicant does not consider such subject matter to be part of the disclosed subject matter.

Claims

1. A laser flying shear device for stainless steel plates is characterized by comprising a workbench (100), a movable gantry laser cutting frame (200) and a gantry positioning mechanism (300);

a group of speed-regulating pressing pieces (110) are respectively arranged at the front end and the rear end of the top of the workbench (100); each group of speed regulation pressing pieces (110) comprises an upper pressing roll group (111) and a lower pressing roll group (112); the workbench (100) comprises a base (101) and a pressing frame (102) above the base (101), and the pressing frame (102) is connected with the base (101) through a tightness adjusting assembly (103); the upper pressing roller group (111) is fixedly connected with the pressing frame (102), and the lower pressing roller group (112) is fixed with the top of the base (101);

the movable gantry laser cutting frame (200) comprises a gantry frame (210), a laser head longitudinal movement assembly (220) and a laser cutting head assembly (230); the laser head longitudinal movement assembly (220) comprises a driving part (221), a guiding part (222) and a mounting part (223) connected with the guiding part (222) in a sliding mode; the driving part (221) is connected with the mounting part (223); the guide part (222) is fixed with the portal frame (210), and the mounting part (223) is fixed with the top of the laser cutting head assembly (230).

2. The laser flying shear device for the stainless steel plates, according to claim 1, is characterized in that the upper compression roller group (111) in each group of speed-regulating compression members (110) comprises a plurality of upper compression rollers (1111) and upper compression roller driving motors (1112) which are arranged in parallel, the upper compression rollers (1111) are driven by the upper compression roller driving motors (1112) to rotate in a speed-regulating manner, and the upper compression roller driving motors (1112) are fixed with the compression frame (102); the lower compression roller group (112) in each group of speed-regulating compression pieces (110) comprises a plurality of lower compression rollers (1121) and lower compression roller driving motors (1122) which are arranged in parallel, and the lower compression rollers (1121) are driven by the lower compression roller driving motors (1122) to rotate in a speed-regulating mode.

3. The laser flying shear device for the stainless steel plates as claimed in claim 2, wherein the tightness adjusting assembly (103) comprises a lifting screw (1031), a lifting screw driving motor (1032) and a lifting nut seat (1033); the lifting screw rod driving motor (1032) is fixed with the top of the base (101); the lifting nut seat (1033) is matched with the lifting screw rod (1031) and fixed with the pressing frame (102).

4. The laser flying shear device for the stainless steel plates as claimed in claim 1, wherein a jacking piece (400) is further arranged at the top of the workbench (100), and the jacking piece (400) is arranged between the two groups of speed-regulating pressing pieces (110); the top supporting piece (400) is fixed with the top of the base (101), and the top surface of the top supporting piece (400) is flush with the top of the lower pressing roller group (112).

5. The laser flying shear apparatus for stainless steel plates according to claim 4, wherein the jacking member (400) comprises a plurality of detachably connected spacer blocks (410); at least one side surface of the cushion block (410) is provided with a clamping groove (411), and at least one side surface is provided with a clamping connector (412); the clamping head (412) is matched with the clamping groove (411).

6. The laser flying shear device for the stainless steel plates as claimed in claim 1, wherein the gantry positioning mechanism (300) comprises a traverse guide rail (301), a traverse slide block (302), a traverse nut seat (303), a traverse screw rod (304), a traverse screw rod driving motor (305) and a mounting frame (306); the transverse moving guide rail (301) is fixed with the lower part of the base (101); the traversing slide block (302) is fixed with the bottom of the portal frame (210); the transverse moving nut seat (303) is fixedly connected with the portal frame (210); the transverse moving screw rod (304) is matched with the transverse moving nut seat (303); and two ends of the traverse screw rod (304) are respectively connected with the mounting frame (306) and the traverse screw rod driving motor (305).

7. The laser flying shear device for the stainless steel plate as claimed in claim 6, wherein a proximity switch (307) is further arranged on the traverse guide rail (301), the proximity switch (307) is in communication connection with a PLC (programmable logic controller) (308), the proximity switch (307) sends a command to the PLC (308) after contacting with the gantry (210), and the PLC (308) controls the traverse screw driving motor (305) to stop driving the traverse screw (304) to rotate after receiving the command.