A laser cutting device for machine tool accessory manufacturing

Abstract

The application belongs to the technical field of laser cutting, and particularly relates to a laser cutting device for manufacturing machine tool accessories, which comprises a cutting table, the top end of the cutting table is provided with a first moving frame, one side of the first moving frame is provided with a moving table, the side of the moving table away from the first moving frame is fixedly provided with a connecting shell, the side of the connecting shell away from the moving table is provided with a laser generator, further comprises a first connecting plate, a plurality of fixed-focus lenses are equidistantly arranged on the outer side of the first connecting plate, one side of the connecting shell close to the laser generator is fixedly provided with a pair of limiting plates, and a second lifting plate is slidably connected between the limiting plates, a plurality of fixed-focus lenses are arranged on the outer side of the first connecting plate, a servo motor rotates to drive the fixed-focus lenses to rotate, different focal length fixed-focus lenses are switched to the lower side of the laser generator through the first connecting plate, so that the focal length of the laser generator is changed, different material metal plates can be dealt with, and the external switching mode can prevent wear caused by the position of the traditional internal lens.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of laser cutting, and particularly relates to a laser cutting device for manufacturing machine tool accessories. BACKGROUND

[0002] A machine tool accessory is a component matched in the use process of a machine tool, and a metal plate needs to be cut during machining of the machine tool accessory. Laser cutting adopts non-contact processing, and the spot diameter can reach the micron level. The metal plate is cut into a required size by using the laser cutting device, and the cutting precision is higher and the error is smaller.

[0003] A hand-operated focusing optical fiber laser cutting head disclosed in a prior art patent with the announcement number CN110000468B comprises, in sequence, an optical fiber interface seat, a water cooling assembly, a collimating mirror assembly, a focusing mirror assembly, a protective mirror assembly and a cutting nozzle, and can realize the functions of cutting carbon steel plates and stainless steel plates.

[0004] The technical scheme above needs to manually adjust the focal length of the cutting head during use, but the internal structure of the cutting head is relatively complex, and the internal parts will be worn after long-time use, so that the precision of adjusting the focal length is reduced, the cutting effect is affected, and the cutting head needs to be disassembled when the internal parts are replaced, which is relatively cumbersome.

[0005] Therefore, the application provides a laser cutting device for manufacturing machine tool accessories. SUMMARY

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0007] The technical scheme adopted by the application to solve the technical problem is that the laser cutting device for manufacturing machine tool accessories comprises a cutting table, a first moving frame is arranged at the top end of the cutting table, a moving table is arranged on one side of the first moving frame, a connecting shell is fixed on the side of the moving table away from the first moving frame, and a laser generator is arranged on the side of the connecting shell away from the moving table.

[0008] Further comprising a first connecting plate, a plurality of focusing lenses are arranged at equal intervals on the outer side of the first connecting plate, one of the focusing lenses is arranged at the bottom end of the laser generator, a servo motor is installed at the top end of the connecting shell, a pair of limiting plates are fixed on the side of the connecting shell close to the laser generator, a second lifting plate is slidably connected between the limiting plates, and the second lifting plate is fixedly connected with the laser generator.

[0009] The servo motor drives the first connecting plate to switch the groups of focusing lenses below the laser generator, and simultaneously drives the second lifting plate to automatically lift and descend in the limiting plates to cooperate with the switching of the focusing lenses.

[0010] Preferably, the bottom end of the servo motor is fixed with a rotating shaft, the bottom end of the rotating shaft is fixed with a gear disc, the two sides of the gear disc are meshed with a first gear, one side of the first gear is fixed with a bevel gear, the first gear is rotatably connected with the connecting shell through a fixed plate, the inside of the limiting plate is rotatably connected with a second gear, one end of the second gear close to the first gear is also fixed with a bevel gear, the two bevel gears are meshed, and the second gear is meshed with the second lifting plate.

[0011] Preferably, the inside of the connecting shell is provided with an electric telescopic rod on one side, the bottom end of the laser generator is provided with a butt joint snap ring, the top end of the fixed focus lens is provided with a butt joint socket, the middle of the first connecting plate is fixed with a connecting shaft, the top end of the connecting shaft is rotatably connected with a second moving frame.

[0012] The electric telescopic rod pushes down the second moving frame to drive the fixed focus lens to move downward and separate from the laser generator.

[0013] Preferably, the inside of the connecting shell is provided with an electric telescopic rod on one side, the bottom end of the laser generator is provided with a butt joint snap ring, the top end of the fixed focus lens is provided with a butt joint socket, the middle of the first connecting plate is fixed with a connecting shaft, the top end of the connecting shaft is rotatably connected with a second moving frame.

[0014] Preferably, the bottom end of the second moving frame away from the first guide rod is fixed with a fixed ring, the bottom end of the fixed ring is fixed with a second spring, the bottom end of the second spring is fixed with a rotating ring, the bottom end of the rotating ring is fixedly connected with the top end of the second connecting plate, and the fixed ring, the second spring and the rotating ring are all sleeved on the outside of the connecting shaft.

[0015] Preferably, the bottom end of the rotating shaft is fixed with a square rod, the top end of the connecting shaft is fixed with a sleeve, and the square rod is inserted into the inside of the sleeve.

[0016] Preferably, the outside of the fixed focus lens is sleeved with a fixed sleeve, the end of the fixed sleeve away from the fixed focus lens is fixed with a first lifting plate, the outside of the first connecting plate is fixed with a guide frame, the inside of the guide frame is fixed with a second guide rod, the first lifting plate is slidably connected in the inside of the guide frame, the second guide rod penetrates in the inside of the first lifting plate, the inside of the second guide rod is sleeved with a first spring, the top end of the first spring is fixedly connected with the first lifting plate, and the bottom end of the first spring is fixedly connected with the first connecting plate.

[0017] Preferably, the top end of the second connecting plate is fixed with a connecting arm on both sides, and the other end of the connecting arm is fixed with a cover.

[0018] The two fixed focus lenses away from the laser generator are clamped with the bottom end of the cover under the elastic force of the first spring.

[0019] Preferably, the first connecting plate is provided with a second guide plate on the side close to the laser generator, and the bottom end of the second guide plate is tightly attached to the top end of the first lifting plate on the side close to the laser generator.

[0020] Preferably, the top end of the second guide plate is fixed with a connecting frame, and the top end of the connecting frame is fixedly connected with the second moving frame.

[0021] The beneficial effects of the present application are as follows:

[0022] 1. The laser cutting device for manufacturing machine tool accessories, a plurality of focusing lenses are arranged outside the first connecting plate, a servo motor rotates to drive the focusing lenses to rotate and switch different focal length focusing lenses below the laser generator, so as to change the focal length of the laser generator, and the external switching mode can prevent the wear problem caused by the traditional internal lens position.

[0023] 2. The laser cutting device for manufacturing machine tool accessories, the second lifting plate is lifted between the limiting plates, and can be used in cooperation with the first connecting plate to drive the focusing lenses to rotate, the longer the length of the focusing lenses below the laser generator, the longer the distance of the second lifting plate driving the laser generator to rise, so that the wear caused by the too long length of the focusing lenses contacting the metal plate is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0024] The present application will be further described below with reference to the accompanying drawings.

[0025] Figure 1 is a perspective view of the present application;

[0026] Figure 2 is a schematic view of the laser generator structure in the present application;

[0027] Figure 3 is a schematic view of the internal structure of the connecting shell in the present application;

[0028] Figure 4 is a schematic view of the internal structure of the sleeve in the present application;

[0029] Figure 5 is a schematic view of the lens structure in the present application;

[0030] Figure 6 is a schematic view of the second guide plate structure in the present application;

[0031] Figure 7 is a schematic view of the internal structure of the guide frame in the present application;

[0032] Figure 8 is a schematic view of the cover structure in the present application.

[0033] In the diagram: 1. Cutting table; 11. First moving frame; 111. Moving table; 2. Laser generator; 21. Fixed-focus lens; 211. Fixing sleeve; 212. First lifting plate; 22. Connecting shell; 221. Electric telescopic rod; 222. Limiting plate; 223. First guide plate; 224. First guide rod; 225. Second moving frame; 226. Connecting frame; 227. Second guide plate; 23. Servo motor; 231. Rotating shaft; 232. Gear plate; 233. First gear; 234. Second gear; 235. Second lifting plate; 236. Square rod; 237. Sleeve; 24. First connecting plate; 241. Guide frame; 242. Second guide rod; 243. First spring; 244. Connecting shaft; 25. Second connecting plate; 251. Connecting arm; 252. Cover; 253. Fixing ring; 254. Second spring; 255. Rotating ring. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0035] like Figures 1 to 5 As shown in the embodiment of the present invention, a laser cutting device for manufacturing machine tool accessories includes a cutting table 1, a first movable frame 11 is provided at the top of the cutting table 1, a movable stage 111 is provided on one side of the first movable frame 11, a connecting shell 22 is fixed on the side of the movable stage 111 away from the first movable frame 11, and a laser generator 2 is provided on the side of the connecting shell 22 away from the movable stage 111.

[0036] It also includes a first connecting plate 24, on the outer side of the first connecting plate 24, a plurality of fixed-focus lenses 21 are equally spaced, one of the fixed-focus lenses 21 is located at the bottom of the laser generator 2, a servo motor 23 is installed at the top of the connecting shell 22, a pair of limiting plates 222 are fixed on the side of the connecting shell 22 near the laser generator 2, a second lifting plate 235 is slidably connected between the limiting plates 222, and the second lifting plate 235 is fixedly connected to the laser generator 2;

[0037] The servo motor 23 rotates to drive the first connecting plate 24 to switch multiple fixed-focus lenses 21 below the laser generator 2, and at the same time drives the second lifting plate 235 to automatically lift and lower inside the limiting plate 222 to cooperate with the switching of fixed-focus lenses 21.

[0038] The machine tool is used with some accessories. The accessories need to cut the metal plate into the required size in the manufacturing process. In order to ensure smaller cutting error, the laser cutting mode is adopted. When cutting, the metal plate is placed at the top end of the cutting table 1. At this time, the metal plate is placed in the first moving frame 11. Then the laser generator 2 is started to emit laser and pass through the fixed focus lens 21. The fixed focus lens 21 focuses on the metal plate. At this time, the laser cuts the plate. At the same time, the first moving frame 11 and the moving table 111 drive the laser generator 2 to move horizontally and vertically. According to the preset cutting route, the laser generator 2 cuts the metal plate. At this time, the metal plate is cut into the required size and shape. However, the material of the metal plate is different in the cutting process. Different materials are cut with different focal lengths of the fixed focus lens 21. At this time, the servo motor 23 is started to drive the first connecting plate 24 to rotate. The first connecting plate 24 is provided with a plurality of fixed focus fixed focus lenses 21 outside. A plurality of fixed focus lenses 21 are arranged in order according to the length of the focal length. At this time, the first connecting plate 24 drives the fixed focus lens 21 to move away from the lower side of the laser generator 2. According to the material of the metal plate, the fixed focus lens 21 with the corresponding focal length is selected. The first connecting plate 24 rotates the fixed focus lens 21 with the corresponding focal length to the lower side of the laser generator 2. This mode can directly realize zooming by switching different lenses. The position of the internal structure will not change. Long-term use will not cause wear and tear. It can prevent the wear and tear caused by the movement of the lens in the traditional lens.

[0039] The longer the focal length of each group of fixed focus lenses 21, the longer the length. The fixed focus lens 21 with longer length under the laser generator 2 may be in contact with the metal plate when used, which affects the displacement of the laser generator 2 during cutting. Therefore, when the servo motor 23 drives the first connecting plate 24 to rotate to select the fixed focus lens 21, the second lifting plate 235 will be driven to slide between the limiting plates 222. In the initial state, the fixed focus lens 21 with the smallest focal length is placed below the laser generator 2. At this time, the second lifting plate 235 drives the laser generator 2 to extend to the lowest position. When the servo motor 23 drives the first connecting plate 24 to rotate to switch the fixed focus lens 21, the servo motor 23 drives the second lifting plate 235 to rise. The longer the fixed focus lens 21 under the laser generator 2, the higher the height of the laser generator 2 driven by the second lifting plate 235. The height of the laser generator 2 can be automatically adjusted according to the length of the fixed focus lens 21.

[0040] As Figures 1 to 4As shown, the bottom end of the servo motor 23 is fixed with a rotating shaft 231, the bottom end of the rotating shaft 231 is fixed with a toothed disc 232, the two sides of the toothed disc 232 are meshed and connected with a first gear 233, one side of the first gear 233 is fixed with a bevel gear, the first gear 233 is rotationally connected with the connecting shell 22 through a fixed plate, the inside of the limiting plate 222 is rotationally connected with a second gear 234, one end of the second gear 234 close to the first gear 233 is also fixed with a bevel gear, the two bevel gears are meshed and connected, the second gear 234 is meshed and connected with the second lifting plate 235;

[0041] When the second lifting plate 235 needs to drive the laser generator 2 to lift, the servo motor 23 is started to drive the rotating shaft 231 to rotate, at this time the rotating shaft 231 drives the toothed disc 232 to rotate, the toothed disc 232 drives the first gear 233 to rotate, the first gear 233 drives the bevel gear of the second gear 234 to rotate through the bevel gear at the end, at this time the second gear 234 drives the second lifting plate 235 to lift between the two limiting plates 222, the greater the angle of the servo motor 23 driving the first connecting plate 24 to rotate, the higher the height of the second lifting plate 235 driven by the second gear 234 to rise, so that the height of the laser generator 2 can automatically adapt to the length of the fixed focus lens 21.

[0042] As shown in Figures 3 to 6 The inside of the connecting shell 22 is mounted with an electric telescopic rod 221 on one side, the bottom end of the laser generator 2 is provided with a butt joint clasp, the top end of the fixed focus lens 21 is provided with a butt joint socket, the middle of the first connecting plate 24 is fixed with a connecting shaft 244, the top end of the connecting shaft 244 is rotationally connected with a second moving frame 225;

[0043] Among them, the electric telescopic rod 221 pushes down the second moving frame 225 to drive the fixed focus lens 21 to move downward and separate from the laser generator 2;

[0044] The butt joint clasp of the laser generator 2 and the butt joint socket of the fixed focus lens 21 need to be separated before switching the fixed focus lens 21, at this time the electric telescopic rod 221 is started to drive the second moving frame 225 to move downward, at this time the second moving frame 225 can drive the connecting shaft 244 to push down the first connecting plate 24, the first connecting plate 24 will drive multiple fixed focus lenses 21 to descend at this time, the butt joint socket of the fixed focus lens 21 will also separate from the butt joint clasp of the laser generator 2, then the first connecting plate 24 drives the fixed focus lens 21 to rotate to switch the fixed focus lens 21 required to the lower side of the laser generator 2, which can automatically separate the laser generator 2 and the fixed focus lens 21.

[0045] As shown in Figures 3 to 6 The inside of the connecting shell 22 is fixed with a first guide plate 223 on one side, the top end of the second moving frame 225 is fixed with a first guide rod 224 on one side, the first guide rod 224 is slidingly connected in the inside of the first guide plate 223;

[0046] When the electric telescopic rod 221 needs to push the second moving frame 225, the output shaft of the electric telescopic rod 221 pushes the first guide rod 224, the first guide rod 224 pushes the second moving frame 225 downward, so that the second moving frame 225 drives the connecting shaft 244 to descend, and the second moving frame 225 can be limited by the first guide plate 223 and the first guide rod 224.

[0047] As shown in Figures 3 to 6 , the bottom end of the second moving frame 225 away from the side of the first guide rod 224 is fixed with a fixed ring 253, the bottom end of the fixed ring 253 is fixed with a second spring 254, the bottom end of the second spring 254 is fixed with a rotating ring 255, the bottom end of the rotating ring 255 is fixedly connected with the top end of the second connecting plate 25, and the fixed ring 253, the second spring 254 and the rotating ring 255 are all sleeved outside the connecting shaft 244;

[0048] When the fixed focus lens 21 needs to be separated from the laser generator 2, the second moving frame 225 drives the connecting shaft 244 to move downward, the second moving frame 225 extrudes the second spring 254 through the fixed ring 253, when the fixed focus lens 21 needs to be clamped with the laser generator 2, the output shaft of the electric telescopic rod 221 is retracted, at this time, the second spring 254 pushes the fixed ring 253 to drive the second moving frame 225 to push the first guide rod 224, so that the first guide rod 224 can be automatically reset, and the laser generator 2 and the fixed focus lens 21 are automatically clamped.

[0049] As shown in Figures 3 to 5 , the bottom end of the rotating shaft 231 is fixed with a square rod 236, the top end of the connecting shaft 244 is fixed with a sleeve 237, and the square rod 236 is inserted into the inside of the sleeve 237;

[0050] When the servo motor 23 needs to drive the first connecting plate 24 to rotate, the servo motor 23 drives the rotating shaft 231 to rotate, the rotating shaft 231 drives the square rod 236 to rotate, the square rod 236 drives the connecting shaft 244 to rotate through the sleeve 237, so that the first connecting plate 24 can rotate, at this time, the first connecting plate 24 can drive the fixed focus lens 21 to rotate, when the electric telescopic rod 221 pushes the second moving frame 225 to descend, the sleeve 237 will slide outside the square rod 236, at this time, the connection between the square rod 236 and the sleeve 237 can be maintained, when the second lifting plate 235 drives the laser generator 2 to rise, it will synchronously drive the second connecting plate 25 to rise, at this time, the second connecting plate 25 can drive the second moving frame 225, the sleeve 237 and the structure below as a whole to move upward through the rotating ring 255, the second spring 254 and the fixed ring 253, at this time, the sleeve 237 has sufficient space inside for the square rod 236 to extend into the inside of the sleeve 237, when the second moving frame 225 rises, it will drive the first guide rod 224 to rise, at this time, the distance between the first guide rod 224 and the electric telescopic rod 221 is shortened, so that the distance controlled by the electric telescopic rod 221 to push downward is automatically reduced, so as to adapt to the current position of the first guide rod 224, and the connection between the sleeve 237 and the square rod 236 can be maintained.

[0051] As shown in Figures 2 to 7 The fixed focus lens 21 is sleeved with a fixed sleeve 211 outside, the first lifting plate 212 is fixed at one end of the fixed sleeve 211 away from the fixed focus lens 21, the guide frame 241 is fixed outside the first connecting plate 24, the second guide rod 242 is fixed inside the guide frame 241, the first lifting plate 212 is slidingly connected inside the guide frame 241, the second guide rod 242 penetrates inside the first lifting plate 212, the first spring 243 is sleeved inside the second guide rod 242, the top end of the first spring 243 is fixedly connected with the first lifting plate 212, and the bottom end of the first spring 243 is fixedly connected with the first connecting plate 24.

[0052] When one of the fixed focus lenses 21 is used, the lengths of the other fixed focus lenses 21 can be longer than that of the fixed focus lens 21 being used, which can cause the longer fixed focus lenses 21 to contact the metal plate, in order to prevent this problem, the guide frame 241 is arranged outside the first connecting plate 24, the fixed sleeve 211 is sleeved outside the fixed focus lens 21, the first lifting plate 212 at the end of the fixed sleeve 211 slides inside the guide frame 241, the elastic force of the first spring 243 can lift the first lifting plate 212 to the highest position inside the guide frame 241, at this time, the fixed focus lens 21 away from the laser generator 2 can be lifted to the highest position, so that when the fixed focus lens 21 below the laser generator 2 is used, the other fixed focus lenses 21 can be prevented from contacting the metal plate.

[0053] As shown in Figures 2 to 8As shown, the top end of the second connecting plate 25 is fixed with a connecting arm 251 on both sides, and the other end of the connecting arm 251 is fixed with a cover 252;

[0054] Wherein, the two fixed focus lenses 21 away from the laser generator 2 are clamped at the top end with the bottom end of the cover 252 under the elastic force of the first spring 243;

[0055] In use, the second guide plate 227 will press the first lifting plate 212 on the side close to the laser generator 2 to the lowest, and the other first lifting plates 212 will be raised to the highest due to the elastic force of the first spring 243, at this time the cover 252 can seal the top end of the fixed focus lens 21, preventing dust from entering the inside of the fixed focus lens 21, when the electric telescopic rod 221 drives the first connecting plate 24 to descend, the first connecting plate 24 will drive the first lifting plate 212, the fixed sleeve 211 and the fixed focus lens 21 to descend through the guide frame 241, at this time the fixed focus lens 21 can be separated from the cover 252, and the cover 252 will not affect the rotation of the fixed focus lens 21 away from the laser generator 2.

[0056] As shown in the drawings, Figures 2 to 7 The top end of the second guide plate 227 is fixed with a connecting frame 226, and the top end of the connecting frame 226 is fixedly connected with the second moving frame 225;

[0057] When the first connecting plate 24 drives the fixed focus lens 21 to rotate, the first lifting plate 212 rotates synchronously, and the second guide plate 227 remains in the original position, at this time the first lifting plate 212 on the side close to the laser generator 2 loses the limiting of the second guide plate 227, and the first spring 243 will push the first lifting plate 212 to rise, and the first lifting plate 212 rotating towards the laser generator 2 will gradually move downwards under the guidance of the edge of the second guide plate 227, until it moves directly below the second guide plate 227, in this way, the fixed focus lens 21 moving below the laser generator 2 is extended downwards, and the fixed focus lens 21 away from the laser generator 2 is raised to the highest, thereby preventing the bottom part away from the laser generator 2 from contacting the metal plate.

[0058] As shown in the drawings, Figures 2 to 7 The top end of the second guide plate 227 is fixed with a connecting frame 226, and the top end of the connecting frame 226 is fixedly connected with the second moving frame 225;

[0059] The second guide plate 227 is connected with the second moving frame 225 through the connecting frame 226, so that the distance between the second guide plate 227 and the first connecting plate 24 always remains the same distance, and will not be affected by the lifting of the laser generator 2 to affect the action of the second guide plate 227 on the first lifting plate 212.

[0060] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A laser cutting apparatus for machine tool accessory manufacture, characterised in that: The utility model relates to a cutting table, the top of cutting table is equipped with first mobile frame, one side of first mobile frame is equipped with moving platform, the side away from first mobile frame of moving platform is fixed with connecting shell, the side away from moving platform of connecting shell is equipped with laser generator, It also includes a first connecting plate, the outer side of the first connecting plate is equipped with multiple fixed focus lenses at equal intervals, one of the fixed focus lenses is arranged at the bottom end of the laser generator, a servo motor is installed at the top end of the connecting shell, a pair of limiting plates are fixed on the side of the connecting shell close to the laser generator, a second lifting plate is slidably connected between the limiting plates, and the second lifting plate is fixedly connected with the laser generator. The servo motor rotates to drive the first connecting plate to switch the multiple groups of fixed focus lenses below the laser generator, and simultaneously drives the second lifting plate to automatically lift within the limiting plates to match the switching of the fixed focus lenses. The bottom end of the servo motor is fixed with a rotating shaft, the bottom end of the rotating shaft is fixed with a gear disc, the two sides of the gear disc are meshingly connected with first gears, the side of the first gear is fixed with a bevel gear, the first gear is rotatably connected with the connecting shell through a fixed plate, the inside of the limiting plate is rotatably connected with a second gear, the end of the second gear close to the first gear is also fixed with a bevel gear, the two bevel gears are meshingly connected, and the second gear is meshingly connected with the second lifting plate. One side of the inside of the connecting shell is installed with an electric telescopic rod, the bottom end of the laser generator is provided with a butt joint snap ring, the top end of the fixed focus lens is provided with a butt joint socket, the middle part of the first connecting plate is fixed with a connecting shaft, and the top end of the connecting shaft is rotatably connected with a second mobile frame. The electric telescopic rod pushes down the second mobile frame to drive the fixed focus lens to move downward and separate from the laser generator. One side of the inside of the connecting shell is fixed with a first guide plate, one side of the top end of the second mobile frame is fixed with a first guide rod, and the first guide rod is slidably connected in the inside of the first guide plate. The bottom end of the rotating shaft is fixed with a square rod, the top end of the connecting shaft is fixed with a sleeve, and the square rod is inserted into the inside of the sleeve.

2. A laser cutting apparatus for machine tool accessory manufacture according to claim 1 characterised in that: The outside of the fixed focus lens is sleeved with a fixed sleeve, one end of the fixed sleeve away from the fixed focus lens is fixed with a first lifting plate, the outer side of the first connecting plate is fixed with a guide frame, the inside of the guide frame is fixed with a second guide rod, the first lifting plate is slidably connected in the inside of the guide frame, the second guide rod penetrates in the inside of the first lifting plate, the inside of the second guide rod is sleeved with a first spring, the top end of the first spring is fixedly connected with the first lifting plate, and the bottom end of the first spring is fixedly connected with the first connecting plate.

3. A laser cutting apparatus for machine tool accessory manufacture according to claim 1 characterised in that: The top end of the second connecting plate is fixed with a connecting arm on both sides, and the other end of the connecting arm is fixed with a cover.

4. A laser cutting apparatus manufactured as a machine tool accessory according to claim 3, characterized in that: The top end of the two fixed focus lenses away from the laser generator is clamped with the bottom end of the cover under the elastic force of the first spring. The side of the first connecting plate above close to the laser generator is provided with a second guide plate, and the bottom end of the second guide plate is tightly attached to the top end of the first lifting plate on the side close to the laser generator.

5. A laser cutting apparatus for machine tool accessory manufacture according to claim 4, characterised in that: ​ 6. A laser cutting apparatus for machine tool accessory manufacture according to claim 5, characterised in that: The top end of the second guide plate is fixed with a connecting frame, and the top end of the connecting frame is fixedly connected with the second moving frame.

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