CN111790992A

CN111790992A - Automatic laser cutting machine of material loading

Info

Publication number: CN111790992A
Application number: CN202010709646.2A
Authority: CN
Inventors: 徐晓东; 邵科; 李黎; 汪丹; 计龙余; 沈科; 张立峰
Original assignee: Jiangsu Yinyang Stainless Steel Pipe Industry Co ltd
Current assignee: Jiangsu Yinyang Stainless Steel Pipe Industry Co ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2020-10-20
Anticipated expiration: 2040-07-22
Also published as: CN111790992B

Abstract

The invention discloses an automatic-feeding laser cutting machine which comprises a machine base, wherein a clamping mechanism for clamping a steel pipe and a laser gun for cutting off the steel pipe are arranged on the machine base, a chain conveyor belt for feeding the steel pipe into the clamping mechanism is arranged outside the machine base, two feeding plates in a V shape are erected above the chain conveyor belt and used for supporting the steel pipe, a positioning block for abutting against one end of the steel pipe is arranged on the machine base, a sliding table for the positioning block to be attached and slide is arranged on the machine base, the positioning block and the sliding table are detachably fixed, and a material receiving frame positioned below the laser gun is arranged on the machine base; the positioning block is provided with a displacement sensor which is in contact with the end face of the steel pipe, the base is provided with a controller which drives the clamping mechanism, the laser gun and the chain conveyor belt, the displacement sensor is electrically connected with the controller, and a counter is arranged in the controller. The automatic material cutting of the steel pipe is realized by means of the matching of the chain conveyor belt, the clamping mechanism and the positioning block.

Description

Automatic laser cutting machine of material loading

Technical Field

The invention relates to a laser cutting machine, in particular to an automatic feeding laser cutting machine.

Background

The laser cutting processing is to replace the traditional mechanical knife by invisible light beams, has the characteristics of high precision, quick cutting, no limitation on cutting patterns, automatic typesetting, material saving, smooth cut, low processing cost and the like, and can gradually improve or replace the traditional metal cutting process equipment.

The long and thin steel pipe is a material that many building and mechanical technical field often used, cut into the steel pipe of different length size according to the user demand, some discarded long and thin steel pipes are convenient for the transportation even, practice thrift the transportation space, cut into the steel pipe of short-size with discarded long and thin steel pipe, long and thin steel pipe cutting equipment appears in the existing market, for example, patent number CN201710927325.8 provides a steel pipe cutter, by the frame, shock dynamo, a pay-off section of thick bamboo, the direction slide rail, cutter head assembly and frame are constituteed, but this equipment can not automatic feeding, and cut off length needs manual regulation, waste time and energy, work efficiency is not high.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an automatic-feeding laser cutting machine which has the effect of automatically cutting a steel pipe.

In order to achieve the technical purpose, the invention provides the following technical scheme: the automatic-feeding laser cutting machine comprises a machine base, wherein a clamping mechanism for clamping a steel pipe and a laser gun for cutting off the steel pipe are arranged on the machine base, a chain conveyor belt for feeding the steel pipe into the clamping mechanism is arranged outside the machine base, two feeding plates in a V shape are erected above the chain conveyor belt and used for supporting the steel pipe, a positioning block for abutting against one end of the steel pipe is arranged on the machine base, a sliding table for the positioning block to be attached and slide is arranged on the machine base, the positioning block and the sliding table can be detachably fixed, and a material collecting frame located below the laser gun is arranged on the machine base;

the positioning block is provided with a displacement sensor which is in contact with the end face of the steel pipe, the base is provided with a controller which drives the clamping mechanism, the laser gun and the chain conveyor belt, the displacement sensor is electrically connected with the controller, and a counter is arranged in the controller.

By adopting the technical scheme, according to the length of the steel pipe and the length of the product, each steel pipe can be determined to produce a plurality of products, the position of the positioning block on the sliding table is adjusted, the horizontal distance from the positioning block to the laser gun is the length of the product, the steel pipe is placed on the chain conveyor belt, the chain conveyor belt drives the steel pipe to move and penetrate through the clamping mechanism, one end of the steel pipe is abutted against the positioning block, the displacement sensor senses the steel pipe, the clamping mechanism clamps the steel pipe, the controller starts the laser gun to cut off the steel pipe, the cut-off product falls into the material receiving frame due to dead, meanwhile, the clamping mechanism is loosened, the steel pipe is continuously conveyed into the clamping mechanism by the chain conveyor belt, when the steel pipe is abutted against the positioning block again, the cutting again, until will whole steel pipe processing accomplish, the staff will be the root steel pipe again place on the chain conveyer belt can, realized automatic disconnected material, improved work efficiency.

As preferred, put up square stock bin on the chain conveyer belt, the stock bin is used for depositing the steel pipe of treating the processing, stock bin below extends there is out the feed bin, it includes the striker plate of two passageways that form the confession a steel pipe and pass alone to go out the feed bin, the length direction both ends face of stock bin downwardly extending respectively has the end plate of two closed striker plates, one of them be provided with the striker plate of a plurality of laminating striker plate bottom surfaces on the striker plate, be provided with the drive actuating cylinder that drive striker plate slided along striker plate width direction on the striker plate.

Through adopting above-mentioned technical scheme, in earlier putting into the stock bin with the help of lifting device with a batch of steel pipe lifting, partial steel pipe in the stock bin falls into out the feed bin in proper order because the dead weight, drives actuating cylinder and stretches out and lie in two striker plates with the striker plate, and the steel pipe can't leave out the feed bin. When the steel pipe needs to be put down, the driving cylinder is contracted, the material blocking piece retreats from the material blocking plate, the steel pipe at the lowest part in the material discharging bin leaves the material discharging bin due to dead weight and falls on a chain conveying belt, the driving cylinder is driven to rapidly stretch out, the material blocking piece is clamped between the two material blocking plates again, only one steel pipe is guaranteed to fall down, the steel pipe does not need to be manually placed on the chain conveying belt, the automation degree is further improved, and the working efficiency is improved.

Preferably, the two striker plates are arranged into a convex arc shape protruding towards the middle, and the arcs of the two striker plates are different.

Through adopting above-mentioned technical scheme, the shape of two striker plates is different, and the unable neatly range of steel pipe that piles up on the striker plate is between the striker plate, avoids the steel pipe card in a feed bin, has guaranteed that only one leaves at every turn of steel pipe, has improved structural rationality.

Preferably, every the length direction both ends of striker plate are provided with the extension piece that passes the end plate respectively, set up the waist type hole that supplies extension piece level to slide on the end plate, two extension piece one side in opposite directions is provided with a screw rod one, two respectively the spiral shell of screw rod one is to opposite, be provided with the swivel nut of both ends respectively with a screw rod threaded connection on the end plate.

Through adopting above-mentioned technical scheme, the steel pipe specification is different, and the diameter of steel pipe can be different, consequently also need adjust the interval of two striker plates, guarantees that only a steel pipe falls down at every turn. According to the size of the steel pipe, the threaded sleeve is rotated, the distance between the two material blocking plates is adjusted, and the application range of the laser cutting machine is widened.

Preferably, every the length direction both ends of striker plate are provided with two sliders that are located the extension piece from top to bottom respectively, be provided with two sets of slide rails that supply the slider laminating to slide respectively on the end plate, the slide rail is parallel with end plate width direction.

Through adopting above-mentioned technical scheme, the slider can only slide along slide rail length direction, has guaranteed that two striker plates can only the horizontal slip, avoids the striker plate skew, influences the normal work of steel pipe.

Preferably, the one end that the slip table deviates from clamping mechanism is provided with the fixing base, an exhaust tube is worn to be equipped with to the fixing base is improved level, the locating piece is passed to the one end of exhaust tube, the terminal surface and the locating piece parallel and level of exhaust tube, the frame is provided with the air extractor with the exhaust tube intercommunication outward.

By adopting the technical scheme, the steel pipe can generate scraps during cutting, the scraps are sent to the following working procedure for direct production, the precision of equipment production can be influenced, and the service life of the equipment is reduced. After the steel pipe is clamped by the positioning block and the clamping mechanism, the air extractor is started, the air extraction pipe forms negative pressure on the end face of the positioning block, waste scraps are extracted away, additional cleaning is not needed, and the working efficiency is improved.

Preferably, the air extractor is communicated with the air extraction pipe through a hose, the end part of the hose is fixed on the fixing seat, the hose is horizontally placed, and one end of the air extraction pipe is inserted into the hose in an attaching mode.

Through adopting above-mentioned technical scheme, to the product of unidimensional not, need adjust the position of locating piece, and the one end of exhaust tube is fixed on the locating piece, therefore the other end of exhaust tube can be in the hose slip, and the hose of level placing can not influence the slip of exhaust tube, has guaranteed the normal suction of sweeps, has improved structural rationality.

Preferably, the chain conveyor belt is supported by the frame, the frame is provided with a positioning plate for fixing the two feeding plates, the back surfaces of two ends of the feeding plates in the length direction are fixedly provided with fixing blocks, each fixing block is embedded with an adjusting bolt capable of rotating, the adjusting bolt penetrates through the positioning plate and is in threaded connection with the positioning plate, the positioning plate is provided with a circle of scale marks surrounding the adjusting bolt, and a nut of the adjusting bolt is provided with a mark matched with the scale marks.

Through adopting above-mentioned technical scheme, the external diameter of steel pipe is different, in order to guarantee that the steel pipe contacts the chain conveyer belt, need adjust the interval of two feed plates. With the help of the cooperation of adjusting bolt and fixed block, realize the interval adjustment of delivery sheet, according to the cooperation of scale mark and mark head, guaranteed that two delivery sheets moving distance are the same simultaneously, realized the transport of different external diameter steel pipes, improved automatic feeding device's application scope.

Preferably, the rack comprises four support rods which are respectively used for supporting two rotating shafts of the chain conveyor belt, a screw rod II vertically and downwardly extends from the lower surface of each support rod, an adjusting sleeve is connected to the screw rod II in a threaded manner, an upright post for fixing the adjusting sleeve is arranged below each support rod, and the adjusting sleeve can only rotate in situ relative to the upright post.

Through adopting above-mentioned technical scheme, the steel pipe size changes the back, and the central line of steel pipe just can't be with the material clamping department collineation of laser cutting machine, just need adjust chain conveyor's height this moment, and the rotary adjusting cover, because the relative screw rod of adjusting cover is two rotations, chain conveyor just can vertical lift, makes the steel pipe can with material clamping department collineation, has guaranteed that the steel pipe accuracy is sent to material clamping department, has improved the transportation accuracy.

In summary, the present invention achieves the following effects:

1. the automatic material cutting of the steel pipe is realized by means of the matching of the chain conveyor belt, the clamping mechanism and the positioning block;

2. the automatic feeding of the steel pipes is realized by means of the matching of the storage bin, the discharge bin and the chain conveyor belt;

3. the change of the distance between the two baffle plates is realized by means of the matching of the baffle plates and the first screw rod, the change of the position of the positioning block is realized by means of the matching of the positioning block, the exhaust pipe and the hose, the height adjustment of the chain conveyor belt is realized by means of the matching of the chain conveyor belt and the rack, and the application range of the automatic laser material cutting machine is widened.

Drawings

FIG. 1 is a schematic view for showing the overall structure in the present embodiment;

FIG. 2 is a schematic diagram of the present embodiment illustrating the relationship between the existing silo and the discharging silo;

FIG. 3 is a schematic diagram illustrating the relationship between the striker plate and the end plate in the present embodiment;

FIG. 4 is a schematic view of the present embodiment showing the mating relationship of the feed plate and the chain conveyor;

in the figure, 1, a machine base; 11. a clamping mechanism; 12. a laser gun; 13. a sliding table; 14. a material receiving frame; 15. positioning blocks; 16. a fixed seat; 17. an air exhaust pipe; 18. a hose; 2. a chain conveyor; 21. a frame; 22. positioning a plate; 23. a fixed block; 24. adjusting the bolt; 25. a support bar; 26. a second screw; 27. an adjusting sleeve; 28. a column; 3. a feeding plate; 4. a storage bin; 5. a discharging bin; 51. a striker plate; 52. an end plate; 53. a material blocking sheet; 54. a driving cylinder; 55. the extension is fast; 56. a first screw rod; 57. a threaded sleeve; 58. a slider; 59. a slide rail; 60. and (5) prolonging the blocks.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Example (b): the utility model provides an automatic laser cutting machine of material loading, as shown in figure 1, including frame 1, be provided with the clamping mechanism 11 that is used for pressing from both sides tight steel pipe on the frame 1 and cut off the laser gun 12 of steel pipe, frame 1 is provided with the chain conveyer belt 2 that sends the steel pipe into clamping mechanism 11 outward, two feed plates 3 that are the V style of calligraphy are erect to the top of chain conveyer belt 2, two feed plates 3 are used for holding the steel pipe, be provided with the locating piece 15 that is used for supporting steel pipe one end on the frame 1, be provided with the slip table 13 that supplies the laminating of locating piece 15 to slide on the frame 1, locating piece 15 can be dismantled fixedly with slip table 13, frame 1 is provided with the receipts material frame 14.

The positioning block 15 is provided with a displacement sensor contacting with the end face of the steel pipe, the machine base 1 is provided with a controller driving the clamping mechanism 11, the laser gun 12 and the chain conveyor belt 2, the displacement sensor is electrically connected with the controller, and a counter is arranged in the controller. Confirm that every steel pipe can produce several products, the position of adjustment locating piece 15 on slip table 13, make the horizontal distance of locating piece 15 to laser gun 12 be the length of product, place the steel pipe on chain conveyor 2, chain conveyor 2 drives the steel pipe and removes and passes clamping mechanism 11, the one end butt locating piece 15 of steel pipe, displacement sensor senses the steel pipe, clamping mechanism 11 presss from both sides the steel pipe tightly, the controller starts laser gun 12, cut off the steel pipe, the product that downcuts falls into material receiving frame 14 because of the dead weight, clamping mechanism 11 loosens simultaneously, chain conveyor 2 continues to send the steel pipe into clamping mechanism 11, when steel pipe butt locating piece 15 once more, the recutting, until will whole steel pipe processing accomplish, the staff again with the next steel pipe place on chain conveyor 2 can, automatic disconnected material has been realized, work efficiency is improved.

The clamping mechanism 11 adopts a pneumatic three-jaw chuck commonly used by machine tools according to different requirements

As shown in fig. 1, a fixing seat 16 is arranged at one end of the sliding table 13 away from the clamping mechanism 11, an air exhaust pipe 17 is horizontally arranged on the fixing seat 16, one end of the air exhaust pipe 17 penetrates through the positioning block 15, the end surface of the air exhaust pipe 17 is flush with the positioning block 15, and an air extractor communicated with the air exhaust pipe 17 is arranged outside the machine base 1. The steel pipe can produce the sweeps when cutting, send the direct production of back process, can influence the precision of equipment production to reduce equipment life. After the steel pipe is clamped by the positioning block 15 and the clamping mechanism 11, the air extractor is started, the air extraction pipe 17 forms negative pressure on the end face of the positioning block 15, waste scraps are extracted, additional cleaning is not needed, and the working efficiency is improved.

As shown in fig. 1, the air extractor is communicated with an air extraction pipe 17 through a hose 18, the end of the hose 18 is fixed on the fixed seat 16, the hose 18 is horizontally placed, and one end of the air extraction pipe 17 is inserted into the hose 18 in an attaching manner. Aiming at products with different sizes, the position of the positioning block 15 needs to be adjusted, one end of the air exhaust pipe 17 is fixed on the positioning block 15, so that the other end of the air exhaust pipe 17 can slide in the hose 18, the horizontally arranged hose 18 cannot influence the sliding of the air exhaust pipe 17, the normal suction of waste scraps is ensured, and the structural reasonability is improved.

As shown in fig. 1 and 2, a square stock bin 4 is erected on the chain conveyor belt 2, the stock bin 4 is used for storing steel pipes to be processed, a discharge bin 5 extends below the stock bin 4, the discharge bin 5 comprises two striker plates 51 forming a passage through which one steel pipe passes independently, two end faces of the stock bin 4 in the length direction extend downwards respectively to form end plates 52 for sealing the two striker plates 51, one striker plate 51 is provided with a plurality of striker plates 53 attached to the bottom surfaces of the striker plates 51, and the striker plates 51 are provided with driving cylinders 54 for driving the striker plates 53 to slide along the width direction of the striker plates 51.

In earlier putting into stock bin 4 with the help of lifting device with a batch of steel pipes lifting, partial steel pipe in stock bin 4 falls into out feed bin 5 in proper order because the dead weight, drives actuating cylinder 54 and stretches out striker plate 53 and be located between two striker plates 51, and the steel pipe can't leave out feed bin 5. When the steel pipe needs to be put down, the contraction drives the actuating cylinder 54, the striker plate 53 moves away from the striker plate 51, the steel pipe at the bottom in the discharging bin 5 leaves the discharging bin 5 due to dead weight and falls on the chain conveyor belt 2, the actuating cylinder 54 is driven to extend rapidly, the striker plate 53 is clamped between the two striker plates 51 again, only one steel pipe is guaranteed to fall down, the steel pipe does not need to be manually placed on the chain conveyor belt 2, the automation degree is further improved, and the working efficiency is improved.

As shown in fig. 2, the two striker plates 51 are arranged in a convex arc shape protruding toward the middle, and the two striker plates 51 have different arcs. The shape of two striker plates 51 is different, and the unable neatly arranged of the steel pipe that piles up on striker plate 51 is avoided the steel pipe card in a feed bin 5 between striker plate 51, has guaranteed that only one leaves at every turn of steel pipe, has improved structural rationality.

As shown in fig. 2 and 3, two ends of each striker plate 51 in the length direction are respectively provided with an extension block 60 penetrating through the end plate 52, the end plate 52 is provided with a kidney-shaped hole for the horizontal sliding of the extension block 60, one opposite side of the two extension blocks 60 is respectively provided with a first screw 56, the screw directions of the first screws 56 are opposite, and the end plate 52 is provided with a threaded sleeve 57, two ends of which are respectively in threaded connection with the first screws 56. The diameters of the steel pipes are different when the specifications of the steel pipes are different, so that the distance between the two material baffle plates 51 also needs to be adjusted, and only one steel pipe falls down at a time. According to the size of the steel pipe, the threaded sleeve 57 is rotated, the distance between the two material blocking plates 51 is adjusted, and the application range of the laser cutting machine is widened.

As shown in fig. 2 and 3, two sliding blocks 58 respectively located above and below the extending block 60 are disposed at two ends of each striker plate 51 in the length direction, two sets of sliding rails 59 for the sliding blocks 58 to slide are disposed on the end plate 52, and the sliding rails 59 are parallel to the end plate 52 in the width direction. The sliding block 58 can only slide along the length direction of the sliding rail 59, so that the two striker plates 51 can only horizontally slide, and the striker plates 51 are prevented from deviating to influence the normal work of the steel pipe.

As shown in fig. 4, the chain conveyor belt 2 is supported by a frame 21, a positioning plate 22 for fixing two feeding plates 3 is arranged on the frame 21, fixing blocks 23 are fixedly arranged on the back surfaces of two ends of each feeding plate 3 in the length direction, an adjusting bolt 24 capable of rotating is embedded in each fixing block 23, the adjusting bolt 24 penetrates through the positioning plate 22 and is in threaded connection with the positioning plate 22, a circle of scale marks surrounding the adjusting bolt 24 is arranged on the positioning plate 22, and a header matched with the scale marks is arranged on a nut of the adjusting bolt 24. When the outer diameters of the steel pipes are different, the distance between the two feeding plates 3 needs to be adjusted in order to ensure that the steel pipes contact the chain conveyor belt 2. With the help of adjusting bolt 24 and fixed block 23's cooperation, realize the interval adjustment of delivery sheet 3, according to the cooperation of scale mark and mark head, guaranteed that two delivery sheet 3 migration distance are the same simultaneously, realized the transport of different external diameter steel pipes, improved automatic feeding device's application scope.

As shown in fig. 4, the frame 21 includes four support rods 25 for supporting two rotation shafts of the chain conveyor 2, respectively, a second screw 26 extends vertically downward from the lower surface of the support rod 25, an adjusting sleeve 27 is connected to the second screw 26 by a thread, an upright post 28 for fixing the adjusting sleeve 27 is disposed below the support rod 25, and the adjusting sleeve 27 can only rotate in place relative to the upright post 28. After the size of the steel pipe is changed, the center line of the steel pipe cannot be collinear with the material clamping position of the laser cutting machine, the height of the chain conveyor belt 2 needs to be adjusted at the moment, the adjusting sleeve 27 is rotated, and the chain conveyor belt 2 can vertically lift due to the rotation of the adjusting sleeve 27 relative to the second screw rod 26, so that the steel pipe can be collinear with the material clamping position, the steel pipe is guaranteed to be accurately conveyed to the material clamping position, and the transportation accuracy is improved.

Claims

1. The utility model provides an automatic material machine is cut off to laser of material loading which characterized in that: the steel pipe cutting machine comprises a machine base (1), wherein a clamping mechanism (11) for clamping a steel pipe and a laser gun (12) for cutting off the steel pipe are arranged on the machine base (1), a chain conveyor belt (2) for conveying the steel pipe into the clamping mechanism (11) is arranged outside the machine base (1), two feeding plates (3) in a V shape are erected above the chain conveyor belt (2), the two feeding plates (3) are used for supporting the steel pipe, a positioning block (15) for supporting one end of the steel pipe is arranged on the machine base (1), a sliding table (13) for the positioning block (15) to be attached and slid is arranged on the machine base (1), the positioning block (15) and the sliding table (13) can be detachably fixed, and the machine base (1) is provided with a material receiving frame (14) located below the laser gun (12;

the device is characterized in that a displacement sensor which is in contact with the end face of the steel pipe is arranged on the positioning block (15), a controller which drives the clamping mechanism (11), the laser gun (12) and the chain conveyor belt (2) is arranged on the machine base (1), the displacement sensor is electrically connected with the controller, and a counter is arranged in the controller.

2. The automatic feeding device of the laser cutting machine according to claim 1, characterized in that: chain conveyor (2) are put on the shelf and are equipped with square storage bin (4), storage bin (4) are used for depositing the steel pipe of treating processing, storage bin (4) below is extended there is feed bin (5), it supplies striker plate (51) of the passageway that a steel pipe passed alone to go out feed bin (5) including two formation, the length direction both ends face of storage bin (4) downwardly extending respectively has end plate (52) of two closed striker plates (51), one of them be provided with fender piece (53) of a plurality of laminating striker plates (51) bottom surface on striker plate (51), be provided with drive actuating cylinder (54) that drive fender piece (53) slided along striker plate (51) width direction on striker plate (51).

3. The automatic feeding device of the laser cutting machine according to claim 2, characterized in that: the two striker plates (51) are arranged into a convex arc shape protruding towards the middle, and the arcs of the two striker plates (51) are different.

4. The automatic feeding device of the laser cutting machine according to claim 3, characterized in that: every the length direction both ends of striker plate (51) are provided with extension piece (60) of passing end plate (52) respectively, set up the waist type hole that supplies extension piece (60) horizontal slip on end plate (52), two extension piece (60) one side in opposite directions is provided with a screw rod (56) respectively, two the spiral shell of screw rod (56) is opposite, be provided with swivel nut (57) of both ends respectively with a screw rod (56) threaded connection on end plate (52).

5. The automatic feeding device of the laser cutting machine according to claim 4, characterized in that: every the length direction both ends of striker plate (51) are provided with two slider (58) that are located extension block (60) from top to bottom respectively, be provided with two sets of slide rail (59) that supply slider (58) laminating to slide respectively on end plate (52), slide rail (59) are parallel with end plate (52) width direction.

6. The automatic feeding device of the laser cutting machine according to any one of claims 1-5, characterized in that: one end that slip table (13) deviates from clamping mechanism (11) is provided with fixing base (16), an exhaust tube (17) is worn to be equipped with in fixing base (16) the higher authority, locating piece (15) are passed to the one end of exhaust tube (17), the terminal surface and locating piece (15) parallel and level of exhaust tube (17), frame (1) is provided with the air extractor with exhaust tube (17) intercommunication outward.

7. The automatic feeding device of the laser cutting machine according to claim 6, characterized in that: the air extractor is communicated with the air extraction pipe (17) through a hose (18), the end part of the hose (18) is fixed on the fixed seat (16), the hose (18) is horizontally arranged, and one end of the air extraction pipe (17) is attached and inserted into the hose (18).

8. The automatic feeding device of the laser cutting machine according to claim 7, characterized in that: chain conveyor (2) support through frame (21), be provided with locating plate (22) that are used for fixed two feed plates (3) on frame (21), every the fixed block (23) that is provided with in the length direction both ends back of feed plate (3), every but inlay adjusting bolt (24) that are equipped with the rotation on fixed block (23), adjusting bolt (24) pass locating plate (22) and with locating plate (22) threaded connection, be provided with the round scale mark that encircles adjusting bolt (24) on locating plate (22), be provided with on the nut of adjusting bolt (24) with scale mark complex mark head.

9. The automatic feeding device of the laser cutting machine according to claim 8, characterized in that: the frame (21) comprises four supporting rods (25) which are respectively used for supporting two rotating shafts of the chain conveyor belt (2), a second screw rod (26) vertically extends downwards from the lower surface of each supporting rod (25), an adjusting sleeve (27) is connected to the second screw rod (26) in a threaded mode, an upright post (28) used for fixing the adjusting sleeve (27) is arranged below each supporting rod (25), and each adjusting sleeve (27) can only rotate in place relative to the upright post (28).