CN112743240A

CN112743240A - Laser cutting device for mechanical parts

Info

Publication number: CN112743240A
Application number: CN202011589052.9A
Authority: CN
Inventors: 方志林
Original assignee: Zhuji Xunxianyun Technology Co Ltd
Current assignee: Shenzhen Jingke Vision Technology Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-05-04
Anticipated expiration: 2040-12-29
Also published as: CN112743240B

Abstract

The invention discloses a laser cutting device for mechanical parts in the field of mechanical part machining, which comprises a cutting fixing plate, wherein a slideway is formed in the cutting fixing plate, a rack is fixedly connected to the inner wall of the slideway, a motor box is arranged at the top of the cutting fixing plate, a first motor is arranged in the motor box, the output end of the first motor is rotatably connected with a gear, and the gear is meshed with the rack; according to the laser cutting machine, the air cylinder drives the thrust rod to stretch, so that the pressing plate can be in contact with the turnover rod, the turnover rod can be pressed downwards, when the turnover rod is pressed downwards, two ends of the turnover rod are respectively hinged with the cutting groove and the motor frame through hinges, and the position of the motor frame can be changed, so that when a worker performs laser cutting on mechanical parts, the mechanical parts and the laser cutting device can be displaced in an all-around and dead-angle-free mode, the cutting efficiency is improved, and meanwhile the working difficulty of the worker is saved.

Description

Laser cutting device for mechanical parts

Technical Field

The invention relates to the field of mechanical part processing, in particular to a laser cutting device for a mechanical part.

Background

Mechanical parts are also called mechanical elements which are basic elements forming the machinery and are inseparable single parts forming the machinery and the machinery, the mechanical parts are subjects for researching and designing mechanical basic parts in various equipment and are also general names of parts and components, and with the development of the mechanical industry, the appearance of new design theories and methods, new materials and new processes, the mechanical parts enter a new development stage. Theories such as finite element methods, fracture mechanics, elastohydrodynamic lubrication, optimization design, reliability design, computer-aided design, solid modeling, system analysis, and design methodology have been increasingly used in the research and design of mechanical parts.

Laser cutting means that a high-power-density laser beam is used for irradiating a material to be cut, the material is heated to a vaporization temperature quickly and is evaporated to form holes, and the holes continuously form slits with narrow width (such as about 0.1 mm) along with the movement of the material by the light beam, so that the material is cut.

When the existing laser cutting device is used for cutting mechanical parts, the cutting modes are generally divided into two modes, one mode is that a worker holds a cutting gun to cut the mechanical parts, the temperature of the whole cutting table is instantly increased due to laser flame emitted by the cutting gun during cutting, and dangerous safety accidents are easily caused for the worker, the other mode is that the cutting gun is installed inside the cutting device, so that the cutting gun cannot effectively and flexibly move, and the problem of poor cutting efficiency is caused, meanwhile, when the mechanical parts are cut, the worker usually fixes the mechanical parts on the cutting table, so that when the mechanical parts are required to be displaced or overturned, the worker is required to manually disassemble the mechanical parts on the cutting table, and then the mechanical parts can be overturned, the method greatly influences the working efficiency of workers, and occupies the working time of the workers for a long time, so that a laser cutting device for mechanical parts is needed.

Disclosure of Invention

The present invention is directed to a laser cutting device for mechanical parts, which solves the above problems.

In order to achieve the purpose, the invention provides the following technical scheme:

a laser cutting device for mechanical parts comprises a cutting fixing plate, a slide way is arranged in the cutting fixing plate, a rack is fixedly connected to the inner wall of the slide way, a motor box is arranged at the top of the cutting fixing plate, a first motor is arranged in the motor box, a gear is rotatably connected to the output end of the first motor, the gear is meshed with the rack, a laser cutting device is arranged at the center of the interior of the gear, a supporting plate is fixedly connected to the bottom of the cutting fixing plate, a cutting table is fixedly connected to one side of the supporting plate, a cutting groove is arranged in the cutting table, an air cylinder supporting rod is fixedly connected to one side of the interior of the cutting groove, an air cylinder is fixedly connected to one side of the air cylinder supporting rod, a thrust rod is arranged at the output end of the air cylinder, and a pressing plate is fixedly connected, cut equal fixedly connected with hinge in both sides of inslot portion, the inside hinged joint of hinge has the upset pole, the one end hinged joint of upset pole has the motor frame, the inside of motor frame is provided with the second motor, the output fixedly connected with clamping device of second motor, cut the inner wall fixedly connected with spring that the inslot is close to the hinge, just the top and the upset pole fixed connection of spring.

As a further scheme of the invention: the quantity of spring is a plurality of roots, and a plurality of the spring divide into four groups, and four groups the spring is at the inner wall that cuts the groove with the form fixed connection of rectangle array, through the setting of a plurality of springs, when the upset pole is removing, the spring cushions the decurrent power of upset pole, after pushing down, the spring has elasticity performance, can bounce the upset pole rapidly for the upset pole keeps former position.

As a still further scheme of the invention: the clamping device comprises a connecting plate, a chute is formed in the connecting plate, a sliding block is connected in the chute in a sliding manner, the sliding block extends to the outside of the chute, one side of the sliding block is fixedly connected with two clamping plates, and when a worker clamps mechanical parts with different sizes, the two clamping plates are respectively connected in the chute in a sliding manner through the sliding block, so that the worker can adjust the distance between the two clamping plates according to the sizes of the mechanical parts, when the mechanical parts are larger, the worker moves the two clamping plates backwards to widen the distance between the two clamping plates, so that the larger mechanical parts can be clamped, and when the smaller mechanical parts are clamped, the worker moves the two clamping plates inwards to narrow the distance between the two clamping plates, thereby can carry out the centre gripping to less machine parts, and then make this device can carry out the centre gripping to the machine parts of variation in size, the flexibility is extremely strong.

As a still further scheme of the invention: the cavity has been seted up to the bottom of connecting plate, the bottom fixedly connected with screw rod of slider, the surface threaded connection of screw rod has stop nut, and after carrying out the centre gripping to machine parts, the staff wrench movement stop nut for stop nut carries out the displacement at the surface of screw rod, thereby contacts with the bottom of connecting plate, and then can fix two grip blocks.

As a still further scheme of the invention: one side of the outer surface of the cutting table is fixedly connected with a refrigeration box, a condenser is arranged in the refrigeration box, the output end of the condenser is fixedly connected with a cooling plate made of copper, the cooling plate extends to the inside of the cutting groove, when the laser cutting is carried out on mechanical parts, a worker starts the refrigeration box to enable a condenser inside the refrigeration box to work, the condenser is formed by dissipating heat to the surrounding air through a long pipe by air, copper and other metals have high heat conductivity and are commonly used for conveying steam, in order to improve the efficiency of the condenser, radiating fins with excellent heat conductivity are often added on a pipeline, the radiating area is enlarged to accelerate the radiation, the air convection is accelerated through a fan to take away heat, and then make this device can carry out rapid cooling to machine parts, prevent that the high temperature from leading to machine parts to produce deformation.

As a still further scheme of the invention: the utility model discloses a storage box, including backup pad, bolt, the equal fixedly connected with in both sides of backup pad surface puts the thing board, the inside threaded connection who puts the thing board has the bolt, the bolt extends to the inside of backup pad, one side fixedly connected with storage box who puts the thing board, and the staff will put the thing board and pass through the inside of bolt threaded connection to the backup pad, and then fix the thing board in one side of backup pad to make the staff can place the inside of putting the storage box with the required working apparatus of during operation, the staff of being.

As a still further scheme of the invention: the quantity of bolt is eight, and eight every four of bolt is a set of, and eight bolts divide into two sets ofly to stability when the opposition thing board is fixed in one side of backup pad has been improved.

As a still further scheme of the invention: the equal fixedly connected with reinforcing plate in both sides of backup pad inner wall, the quantity of reinforcing plate is four, through the setting of four reinforcing plates, can make the inner wall of backup pad connect through the reinforcing plate, has improved the fastness of two backup pads.

Compared with the prior art, the invention has the beneficial effects that:

1. in the invention, through the matching arrangement of the cutting fixing plate, the slide way, the rack, the first motor, the gear, the cutting table, the cutting groove, the cylinder supporting rod, the cylinder, the thrust rod, the hinge, the turnover rod, the second motor and the clamping device, when the device is used, a worker performs laser cutting on a mechanical part, the first motor is started to drive the gear to rotate, the gear is meshed with the rack, so that when the gear rotates, the gear can displace in the slide way, the slide way is wavy in shape, the gear can move in the cutting fixing plate in a large range, the laser cutting device is arranged at the bottom of the gear, the laser cutting device can be displaced, and the worker can displace the laser cutting device according to the position of the mechanical part, the flexibility is extremely strong, when cutting the mechanical parts, the staff clamps the mechanical parts in the clamping device, then the second motor is started, the second motor drives the clamping device to rotate, the mechanical parts are clamped in the clamping device, the staff can rotate the mechanical parts by 360 degrees, when the staff needs to change the cutting direction of the mechanical parts, the cylinder is started, the cylinder drives the thrust rod to extend and retract, so that the pressing plate can be contacted with the turnover rod, the turnover rod can be pressed down, when the turnover rod is pressed down, two ends of the turnover rod are respectively hinged with the cutting groove and the motor frame through hinges, the direction of the motor frame can be changed, and therefore when the staff performs laser cutting on the mechanical parts, the mechanical parts and the laser cutting device can be displaced in an all-round and no dead angle manner, not only improves the cutting efficiency, but also saves the working difficulty of workers.

2. In the invention, through the matching arrangement of the clamping device, the connecting plate, the chute, the slide block, the clamping plates, the screw rod and the limiting nut, when the device is used, when a worker clamps mechanical parts with different sizes, the two clamping plates are respectively connected inside the chute in a sliding way through the slide block, so that the worker can adjust the distance between the two clamping plates according to the sizes of the mechanical parts, when the mechanical parts are larger, the worker displaces the two clamping plates backwards to widen the distance between the two clamping plates, so that the larger mechanical parts can be clamped, when the smaller mechanical parts are clamped, the worker displaces the two clamping plates inwards to narrow the distance between the two clamping plates, so that the smaller mechanical parts can be clamped, and then make this device can carry out the centre gripping to the mechanical parts of variation in size, the flexibility is extremely strong, after carrying out the centre gripping to mechanical parts, the staff wrench movement stop nut for stop nut carries out the displacement at the surface of screw rod, thereby contacts with the bottom of connecting plate, and then can fix two grip blocks.

3. According to the invention, through the matching arrangement between the refrigeration box and the condenser, when the device is used and mechanical parts are subjected to laser cutting, a worker starts the refrigeration box to enable the condenser inside the refrigeration box to work, the condenser dissipates heat to the surrounding air through a long pipe, the metal such as copper has strong heat conductivity and is commonly used for conveying steam, a cooling fin with excellent heat conductivity is often added on a pipeline to improve the efficiency of the condenser, the heat dissipation area is enlarged to accelerate heat dissipation, air convection is accelerated through a fan to take away the heat, and further the device can rapidly cool the mechanical parts and prevent the mechanical parts from being deformed due to overhigh temperature.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the rack structure of the present invention;

FIG. 3 is a schematic view of the internal structure of the cutting groove of the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 3 according to the present invention;

FIG. 5 is a schematic view of the refrigeration case of the present invention;

FIG. 6 is a schematic view of a clamping device according to the present invention.

In the figure: 1. cutting the fixing plate; 2. a slideway; 3. a rack; 4. a motor case; 5. a gear; 6. a support plate; 7. cutting table; 8. cutting the groove; 9. a cylinder support rod; 10. a cylinder; 11. a thrust rod; 12. a hinge; 13. a turning rod; 14. a motor frame; 15. a second motor; 16. a clamping device; 17. a spring; 18. a refrigeration case; 19. cooling tablets; 20. a storage plate; 21. a bolt; 22. a reinforcing plate; 23. pressing a plate; 24. a storage box; 1601. a connecting plate; 1602. a chute; 1603. a slider; 1604. a clamping plate; 1605. a screw; 1606. and a limiting nut.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.

Referring to fig. 1 to 6, in the embodiment of the present invention, a laser cutting device for mechanical parts includes a cutting fixing plate 1, a sliding way 2 is disposed inside the cutting fixing plate 1, a rack 3 is fixedly connected to an inner wall of the sliding way 2, a motor box 4 is disposed at a top of the cutting fixing plate 1, a first motor is disposed inside the motor box 4, an output end of the first motor is rotatably connected with a gear 5, the gear 5 is engaged with the rack 3, a laser cutting device is disposed at a center inside the gear 5, a supporting plate 6 is fixedly connected to a bottom of the cutting fixing plate 1, a cutting table 7 is fixedly connected to one side of the supporting plate 6, a cutting groove 8 is disposed inside the cutting table 7, an air cylinder supporting rod 9 is fixedly connected to one side inside the cutting groove 8, an air cylinder 10 is fixedly connected to one side of the air cylinder supporting rod 9, a thrust rod 11 is disposed at an output end of, hinges 12 are fixedly connected to two sides inside the cutting groove 8, an overturning rod 13 is connected to the hinge inside the hinge 12, a motor frame 14 is connected to one end of the overturning rod 13 in a hinged mode, a second motor 15 is arranged inside the motor frame 14, a clamping device 16 is fixedly connected to the output end of the second motor 15, a spring 17 is fixedly connected to the inner wall, close to the hinge 12, of the cutting groove 8, and the top of the spring 17 is fixedly connected with the overturning rod 13; when a worker performs laser cutting on a mechanical part, the first motor is started, so that the first motor drives the gear 5 to rotate, the gear 5 is meshed with the rack 3, when the gear 5 rotates, the gear 5 can displace in the slide 2, the slide 2 is wavy, so that the gear 5 can move in a large range in the cutting fixing plate 1, the laser cutting device is arranged at the bottom of the gear 5, the laser cutting device can be displaced, the worker can displace the laser cutting device according to the position of the mechanical part, the flexibility is strong, when the mechanical part is cut, the worker clamps the mechanical part in the clamping device 16, then the second motor 15 is started, so that the second motor 15 drives the clamping device 16 to rotate, because machine parts centre gripping is in clamping device 16's inside, and then make the staff can carry out 360 rotations to machine parts, simultaneously when the staff need change machine parts's cutting position, start cylinder 10, make cylinder 10 drive thrust bar 11 and stretch out and draw back, thereby make clamp plate 23 can contact with upset pole 13, and then can push down upset pole 13, when pushing down, the both ends of upset pole 13 are articulated through hinge 12 and cutting groove 8 and motor frame 14 respectively, and then can change motor frame 14's position, thereby make the staff when carrying out laser cutting to machine parts, it is all-round, the displacement is carried out mechanical parts and laser cutting device at no dead angle, cutting efficiency has not only been improved, staff's the work degree of difficulty has also been saved simultaneously.

The number of the springs 17 is a plurality, the springs 17 are divided into four groups, the four groups of springs 17 are fixedly connected to the inner wall of the cutting groove 8 in a rectangular array mode, through the arrangement of the springs 17, when the turnover rod 13 moves, the springs 17 buffer the downward force of the turnover rod 13, and after the turnover rod 13 is pressed downwards, the springs 17 have elastic performance and can quickly bounce the turnover rod 13, so that the turnover rod 13 keeps the original direction; the clamping device 16 comprises a connecting plate 1601, a sliding slot 1602 is formed in the connecting plate 1601, a slider 1603 is slidably connected in the sliding slot 1602, the slider 1603 extends to the outside of the sliding slot 1602, a clamping plate 1604 is fixedly connected to one side of the slider 1603, and the number of the clamping plates 1604 is two, when a worker clamps mechanical parts with different sizes, the two clamping plates 1604 are respectively slidably connected in the sliding slot 1602 through the slider 1603, so that the worker can adjust the distance between the two clamping plates 1604 according to the sizes of the mechanical parts, when the mechanical parts are large, the worker moves the two clamping plates 1604 backwards, the distance between the two clamping plates 1604 becomes wider, so that the large mechanical parts can be clamped, when the small mechanical parts are clamped, the worker moves the two clamping plates 1604 inwards, the distance between the two clamping plates 1604 is narrowed, so that smaller mechanical parts can be clamped, and the device can clamp mechanical parts with different sizes and has strong flexibility; the bottom of the connecting plate 1601 is provided with a cavity, the bottom of the slider 1603 is fixedly connected with a screw 1605, the outer surface of the screw 1605 is in threaded connection with a limit nut 1606, and after clamping mechanical parts, a worker twists the limit nut 1606 to enable the limit nut 1606 to displace on the outer surface of the screw 1605, so that the limit nut contacts with the bottom of the connecting plate 1601 and can further fix the two clamping plates 1604; one side of the outer surface of the cutting table 7 is fixedly connected with a refrigeration box 18, a condenser is arranged in the refrigeration box 18, the output end of the condenser is fixedly connected with a cooling plate 19, the cooling plate 19 is made of copper, the cooling plate 19 extends into the cutting groove 8, when laser cutting is carried out on mechanical parts, a worker starts the refrigeration box 18 to enable a condenser inside the refrigeration box 18 to work, the condenser is formed by dissipating heat to the surrounding air through a long pipe by air, copper and other metals have high heat conductivity and are commonly used for conveying steam, in order to improve the efficiency of the condenser, radiating fins with excellent heat conductivity are often added on a pipeline, the radiating area is enlarged to accelerate the radiation, the air convection is accelerated through a fan to take away heat, and then make this device can carry out rapid cooling to machine parts, prevent that the high temperature from leading to machine parts to produce deformation.

The storage box is characterized in that both sides of the outer surface of the supporting plate 6 are fixedly connected with storage plates 20, bolts 21 are connected to the inner threads of the storage plates 20, the bolts 21 extend into the supporting plate 6, one side of each storage plate 20 is fixedly connected with a storage box 24, a worker connects the storage plates 20 to the inner portion of the supporting plate 6 through the bolts 21 in a threaded mode, and then fixes the storage plates 20 on one side of the supporting plate 6, so that the worker can place working appliances required during working into the storage boxes 24, and the worker can take the working appliances conveniently; the number of the bolts 21 is eight, and each four of the eight bolts 21 are a group, and the eight bolts 21 are divided into two groups, so that the stability of the object placing plate 20 when being fixed on one side of the supporting plate 6 is improved; the equal fixedly connected with reinforcing plate 22 in both sides of 6 inner walls of backup pad, the quantity of reinforcing plate 22 is four, through the setting of four reinforcing plates 22, can make the inner wall of backup pad 6 connect through reinforcing plate 22, has improved the fastness of two backup pads 6.

The working principle of the invention is as follows: when a worker performs laser cutting on a mechanical part, the first motor is started, so that the first motor drives the gear 5 to rotate, the gear 5 is meshed with the rack 3, when the gear 5 rotates, the gear 5 can displace in the slide 2, the slide 2 is wavy, so that the gear 5 can move in a large range in the cutting fixing plate 1, the laser cutting device is arranged at the bottom of the gear 5, the laser cutting device can be displaced, the worker can displace the laser cutting device according to the position of the mechanical part, the flexibility is strong, when the mechanical part is cut, the worker clamps the mechanical part in the clamping device 16, then the second motor 15 is started, so that the second motor 15 drives the clamping device 16 to rotate, because the mechanical parts are clamped inside the clamping device 16, the worker can rotate the mechanical parts by 360 degrees, and simultaneously when the worker needs to change the cutting direction of the mechanical parts, the air cylinder 10 is started, the air cylinder 10 drives the thrust rod 11 to stretch, so that the pressing plate 23 can be contacted with the turnover rod 13, and further can press down the turnover rod 13, when the worker presses down, two ends of the turnover rod 13 are respectively hinged with the cutting groove 8 and the motor frame 14 through the hinges 12, so that the direction of the motor frame 14 can be changed, and therefore when the worker carries out laser cutting on the mechanical parts, the mechanical parts and the laser cutting device can be displaced in an all-round and dead-angle-free manner, the cutting efficiency is improved, the working difficulty of the worker is saved, and when the worker clamps the mechanical parts with different sizes, because the two clamping plates 1604 are slidably connected inside the sliding groove 1602 through the sliding blocks 1603, respectively, a worker can adjust the distance between the two clamping plates 1604 according to the size of a mechanical part, when the mechanical part is large, the worker can move the two clamping plates 1604 backwards to widen the distance between the two clamping plates 1604, so that the large mechanical part can be clamped, when the small mechanical part is clamped, the worker can move the two clamping plates 1604 inwards to narrow the distance between the two clamping plates 1604, so that the small mechanical part can be clamped, so that the device can clamp mechanical parts with different sizes, the flexibility is strong, after the mechanical part is clamped, the worker twists the limit nut 1606 to make the limit nut 1606 displace on the outer surface of the screw 1605, thereby contact with the bottom of connecting plate 1601, and then can fix two grip blocks 1604, when carrying out laser cutting to mechanical parts, the staff starts refrigeration case 18, make the inside condenser of refrigeration case 18 work, the condenser is by a long pipe of gas passage, let the heat scatter and disappear to in the air all around, the metal heat conductivility of copper class is strong, be often used for carrying steam, for the efficiency that improves the condenser often add the fin that heat conductivility is excellent on the pipeline, increase heat radiating area, with higher speed the heat dissipation, and accelerate the air convection through the fan, take away the heat, and then make this device can carry out rapid cooling to mechanical parts, prevent that the high temperature and lead to mechanical parts to produce deformation.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A laser cutting device for mechanical parts comprises a cutting fixing plate (1), and is characterized in that: the cutting device is characterized in that a slide way (2) is arranged in the cutting fixing plate (1), a rack (3) is fixedly connected to the inner wall of the slide way (2), a motor box (4) is arranged at the top of the cutting fixing plate (1), a first motor is arranged in the motor box (4), a gear (5) is rotatably connected to the output end of the first motor, the gear (5) is meshed with the rack (3), a laser cutting device is arranged at the center of the interior of the gear (5), a supporting plate (6) is fixedly connected to the bottom of the cutting fixing plate (1), a cutting table (7) is fixedly connected to one side of the supporting plate (6), a cutting groove (8) is arranged in the cutting table (7), a cylinder supporting rod (9) is fixedly connected to one side of the interior of the cutting groove (8), and a cylinder (10) is fixedly connected to one side of the cylinder supporting rod (9, the output of cylinder (10) is provided with distance rod (11), the one end fixedly connected with clamp plate (23) of distance rod (11), cut equal fixedly connected with hinge (12) in both sides of inside of groove (8), the inside hinged joint of hinge (12) has trip bar (13), the one end hinged joint of trip bar (13) has motor frame (14), the inside of motor frame (14) is provided with second motor (15), the output fixedly connected with clamping device (16) of second motor (15), cut inner wall fixedly connected with spring (17) that groove (8) are close to hinge (12), just the top and trip bar (13) fixed connection of spring (17).

2. The laser cutting device for mechanical parts of claim 1, wherein: the number of springs (17) is a plurality of, and a plurality of springs (17) divide into four groups, and four groups springs (17) are at the inner wall of cutting groove (8) with the form fixed connection of rectangle array.

3. The laser cutting device for mechanical parts of claim 1, wherein: clamping device (16) include connecting plate (1601), spout (1602) have been seted up to the inside of connecting plate (1601), the inside sliding connection of spout (1602) has slider (1603), slider (1603) extend to the outside of spout (1602), one side fixedly connected with grip block (1604) of slider (1603), just the quantity of grip block (1604) is two.

4. The laser cutting device for mechanical parts of claim 3, wherein: the cavity has been seted up to the bottom of connecting plate (1601), the bottom fixedly connected with screw rod (1605) of slider (1603), the surface threaded connection of screw rod (1605) has stop nut (1606).

5. The laser cutting device for mechanical parts of claim 1, wherein: one side fixedly connected with refrigeration case (18) of cutting bed (7) surface, the inside of refrigeration case (18) is provided with the condenser, the output fixedly connected with cooling fin (19) of condenser, just the material of cooling fin (19) is copper, cooling fin (19) extend to the inside of cutting cut groove (8).

6. The laser cutting device for mechanical parts of claim 1, wherein: the equal fixedly connected with in both sides of backup pad (6) surface puts thing board (20), the inside threaded connection who puts thing board (20) has bolt (21), bolt (21) extend to the inside of backup pad (6), one side fixedly connected with storage box (24) of putting thing board (20).

7. The laser cutting device for mechanical parts of claim 6, wherein: the number of the bolts (21) is eight, and the eight bolts (21) are grouped into four.

8. The laser cutting device for mechanical parts of claim 1, wherein: the two sides of the inner wall of the supporting plate (6) are fixedly connected with reinforcing plates (22), and the number of the reinforcing plates (22) is four.