CN114273799A

CN114273799A - Laser cutting head and laser cutting device thereof

Info

Publication number: CN114273799A
Application number: CN202210061253.4A
Authority: CN
Inventors: 刘念; 何恩节; 秦炎福
Original assignee: Anhui University of Science and Technology
Current assignee: Anhui University of Science and Technology
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-04-05
Anticipated expiration: 2042-01-19
Also published as: CN114273799B

Abstract

The invention provides a laser cutting head and a laser cutting device thereof, which comprise a nozzle block, wherein a laser hole is formed in the nozzle block, a first sealing device is arranged between the nozzle block and an air inlet cylinder, and a second sealing device is arranged between a condenser lens seat and a focusing tube; the anti-collision plate is provided with a first through hole and a second through hole respectively, a lifting switch is fixedly arranged in the operation hole, the anti-collision plate can trigger the lifting switch when moving, and a first indicating rod and a second indicating rod are fixedly arranged on the outer side surface of the nozzle block; the outer side of the first sealing device is communicated with a plurality of extrusion pipes, and the elastic hose is communicated with an overpressure exhaust device. The invention provides a laser cutting head and a laser cutting device thereof, wherein an anti-collision device is arranged in the laser cutting head, the cutting head can be effectively protected, a plurality of sealing devices are arranged in the laser cutting head, when part of the sealing devices are aged, automatic repairing can be carried out, when other sealing devices are aged, the degree of air leakage can be warned, and the laser cutting head is convenient to use.

Description

Laser cutting head and laser cutting device thereof

Technical Field

The invention relates to the technical field of laser cutting, in particular to a laser cutting head and a laser cutting device thereof.

Background

The laser cutting is to scan the material surface with high power density focused laser beam, heat the material to thousands or even tens of thousands of degrees centigrade in a very short time to melt or vaporize the material instantly, and blow the melted or vaporized material away from the cutting seam with high pressure gas, thereby achieving the purpose of cutting the material.

In the prior art, a laser cutting head with publication number "CN 209206733U" includes a focusing tube, a nozzle connected with the focusing tube, and an isolation tube arranged in the nozzle; a focusing lens is arranged in the focusing tube; the peripheral wall of the nozzle is provided with an air inlet hole, and one end of the nozzle, which is far away from the focusing pipe, is provided with an air outlet hole; one end of the isolation tube close to the focusing lens is hermetically connected with the focusing tube; the middle part of the isolation tube is provided with a light hole which penetrates through the isolation tube, so that the laser which penetrates through the focusing lens penetrates through the isolation tube and then is emitted from the air outlet hole; the outer peripheral wall of the isolation pipe and the inner wall of the nozzle are arranged at intervals to form an annular gap, the gap is communicated with the air inlet hole and the air outlet hole, the isolation pipe is arranged in the nozzle, and after gas enters the nozzle from the air inlet hole, the gas is guided by the isolation pipe, so that the water vapor entering the nozzle is prevented from directly contacting the focusing lens, and the effect of protecting the focusing lens is achieved; meanwhile, the air blowing is more centralized, and the processing effect is improved.

However, the method still has the obvious defects in the using process: 1. although the isolating pipe is used in the device to promote the gas to be sprayed out towards the gas outlet hole of the nozzle, the gas still can flow upwards, and especially after the gasket is aged or the pressure of the injected gas is high enough, oxygen leakage can be caused, the oxygen spraying speed is reduced, the amount of the ignited oxygen in unit time is reduced, the heat energy generated by the ignited oxygen is reduced, and the cutting effect cannot meet the requirement; 2. the nozzle in the device is likely to collide with other materials when being static or moving in use, the laser head cannot be automatically powered off to stop running when colliding with the materials, and the machine is still in a running state, so that the laser head is damaged and the materials are cut, and therefore improvement is needed.

Disclosure of Invention

The present invention is directed to a laser cutting head and a laser cutting device thereof, so as to solve the problems mentioned in the background art.

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

a laser cutting head comprises a nozzle block, wherein a laser hole is formed in the nozzle block, an air inlet cylinder is arranged on the nozzle block, a first sealing device is arranged between the nozzle block and the air inlet cylinder, an air inlet hole is formed in the air inlet cylinder, a condenser lens seat is arranged on the air inlet cylinder, a condenser lens is fixedly arranged at the bottom of the condenser lens seat, a condenser tube is arranged on the condenser lens seat, and a second sealing device is arranged between the condenser lens seat and the condenser tube;

the side surface of the air inlet cylinder is provided with a plurality of operation holes, anti-collision plates are movably inserted into the operation holes, the anti-collision plates are respectively provided with a first through hole and a second through hole, a lifting switch is fixedly arranged in the operation holes, the anti-collision plates can trigger the lifting switch when moving, the outer side surface of the nozzle block is fixedly provided with a first indicating rod and a second indicating rod, the first indicating rod can penetrate out of the first through hole, and the second indicating rod can penetrate out of the second through hole;

a plurality of extrusion pipes are communicated with the outer side of the first sealing device and are communicated with the hollow ring, the bottom of the hollow ring is communicated with a communicating pipe, a first one-way valve is arranged in the communicating pipe, the communicating pipe is communicated with the storage box, a piston plate is movably arranged in the storage box, a compression spring is connected and arranged between the bottom of the piston plate and the bottom wall of the storage box, the bottom of the storage box is communicated with a hard pipe through an elastic communicating pipe, the hard pipe is embedded in the anti-collision plate, an elastic hose is communicated with the hard tube, one end of the elastic hose, which is far away from the hard tube, is covered outside the first sealing device, a linkage moving device is arranged in the hard tube, the air inlet device can move in the hard tube, a one-way air inlet device is arranged on one side, away from the elastic hose, of the hard tube, and an overpressure exhaust device is communicated with the elastic hose.

Preferably, be located the handle hole the fixed connecting block that is provided with on the anticollision board, the fixed shutoff board that is provided with on the connecting block, the shutoff board passes through extension spring and connects on the fixed block, the fixed block is fixed to be set up in the handle hole.

Preferably, the anti-collision plate is provided with a limit groove, the operating hole is fixedly provided with a blocking block, and the blocking block is correspondingly arranged in the limit groove.

Preferably, the linkage mobile device includes interior push pedal and outer push pedal, the fixed connecting rod that is provided with between interior push pedal and the outer push pedal, the fixed stopper that is provided with in the hard pipe, and the stopper is located between interior push pedal and the outer push pedal, the connection is provided with the reset spring between one side that the connecting rod was kept away from to interior push pedal and the hard pipe lateral wall.

Preferably, the one-way air inlet device comprises an air supply pipe, the air supply pipe is embedded in the anti-collision plate, and a second one-way valve is arranged in the air supply pipe.

Preferably, the overpressure exhaust device comprises an exhaust pipe, the exhaust pipe is communicated with the elastic hose, and a pressure release valve is arranged on the exhaust pipe.

A laser cutting device comprises the laser cutting head.

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

1. when the laser cutting head is in standing or moving in use, if materials or other objects impact the cutting head, the materials or other objects firstly touch the anti-collision plate and the anti-collision plate is pushed inwards until the lifting switch is triggered to start, and the external lifting device such as an air cylinder rapidly moves the whole cutting head upwards to retract, so that hard impact is avoided, and the cutting head is effectively protected;

2. when gas is introduced into the laser cutting head, the gas flows towards the laser hole and the operation hole, so that the anti-collision plate is ejected outwards, the first indicating rod and the second indicating rod cannot be observed, gas leakage does not exist at the moment, the amount of oxygen ignited in unit time is kept stable, more heat energy is generated by the oxygen ignited, and the cutting effect is good;

3. when the first sealing device is aged and gas leaks, fillers such as adhesive sticker and the like in the storage box can be extruded upwards to fill the aging notch of the first sealing device, so that the defects are compensated spontaneously, and the stability of gas outflow is effectively ensured;

4. when the non-first sealing device, such as the second sealing device and the like, of the invention is aged and gas leakage occurs, the gas amount blown to the operation hole is reduced, so that the outward ejection amplitude of the anti-collision plate is reduced, if the gas leakage is smaller, the first indicating rod with a slightly larger length penetrates through the first through hole to indicate a user, and along with the increase of the gas leakage, the second indicating rod with a slightly smaller length also penetrates through the second through hole to indicate that the gas leakage is further increased, so that the maintenance treatment needs to be performed in time, and the operation is more visual and convenient.

The invention provides a laser cutting head and a laser cutting device thereof, wherein an anti-collision device is arranged in the laser cutting head, the cutting head can be effectively protected, multiple sealing devices are arranged in the laser cutting head, automatic repairing can be carried out when part of the sealing devices are aged, the degree of aging and air leakage can be warned when other sealing devices are aged, and the laser cutting head is more convenient to use.

Drawings

FIG. 1 is a schematic front sectional view of the overall structure of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of the invention at B in FIG. 1;

FIG. 4 is a state diagram of the overall structure of the present invention in case one;

FIG. 5 is a diagram illustrating the overall structure of the present invention in case two.

In the figure: 1 nozzle block, 101 laser hole, 2 air inlet cylinder, 201 air inlet hole, 202 operation hole, 3 first sealing device, 4 condenser lens seat, 5 condenser lens, 6 focusing tube, 7 second sealing device, 8 anti-collision plate, 801 first through hole, 802 second through hole, 803 limit groove, 9 connection block, 10 plugging plate, 11 extension spring, 12 fixed block, 13 block, 14 lifting switch, 15 first indicating rod, 16 second indicating rod, 17 extrusion tube, 18 hollow ring, 19 communication tube, 20 first one-way valve, 21 storage tank, 22 piston plate, 23 compression spring, 24 elastic communication tube, 25 hard tube, 26 elastic hose, 27 inner push plate, 28 connecting rod, 29 outer push plate, 30 limit block, 31 restoring spring, 32 air supplement tube, 33 second one-way valve,

exhaust tube

34, 35 relief valve.

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 5, the present invention provides a technical solution:

the first embodiment is as follows:

the utility model provides a laser cutting head, including nozzle block 1, open in the nozzle block 1 and be equipped with laser hole 101, in this embodiment, laser hole 101 is the trapezoidal of narrow down wide, be provided with inlet cylinder 2 on the nozzle block 1, and be provided with first sealing device 3 between nozzle block 1 and the inlet cylinder 2, inlet port 201 has been seted up on the inlet cylinder 2, be used for leading-in air current, be provided with condenser lens seat 4 on the inlet cylinder 2, there is the fixed condensing lens 5 that is provided with in bottom of condenser lens seat 4, be provided with focus pipe 6 on the condenser lens seat 4, and be provided with second sealing device 7 between condenser lens seat 4 and the focus pipe 6, first sealing device 3 and second sealing device 7 all can adopt sealed pad structure.

The side surface of the air inlet cylinder 2 is provided with a plurality of operation holes 202, the operation holes 202 are movably inserted with the anti-collision plates 8, so that the number of the operation holes 202 is equal to that of the anti-collision plates 8, in the embodiment, the operation holes 202 and the anti-collision plates 8 can be three or four, the plurality of anti-collision plates 8 can be enclosed into a circle to resist the collision from all directions, the anti-collision plates 8 are respectively provided with a first through hole 801 and a second through hole 802, the operation holes 202 are fixedly provided with the lifting switch 14, the anti-collision plates 8 can trigger the lifting switch 14 when moving, the lifting switch 14 is in signal connection with an external lifting device, when the lifting switch 14 is triggered by contact, the external lifting device can move the laser cutting head upwards integrally to avoid the external lifting device from being damaged by the collision of foreign objects, the outer side surface of the nozzle block 1 is fixedly provided with a first indication rod 15 and a second indication rod 16, in addition, the first indication rod 15 can penetrate through the first through hole 801, the second indication rod 16 can penetrate through the second through hole 802, the lengths of the first indication rod 15 and the second indication rod 16 are different, in the embodiment, the length of the first indication rod is larger than that of the second indication rod, the first indication rod 15 and the second indication rod 16 are coated with different colors, and the first indication rod 15 and the second indication rod 16 are more visual and easy to distinguish.

The outer side of the first sealing device 3 is communicated with a plurality of extrusion pipes 17, the extrusion pipes 17 are all communicated with a hollow ring 18, the hollow ring 18 is arranged around the first sealing device 3, in the actual installation process, the extrusion pipes 17 and the hollow ring 18 both comprise two parts, one part is positioned in the nozzle block 1, the other part is positioned in the air inlet cylinder 2, semi-rings of the hollow ring 18 are respectively arranged in the nozzle block 1 and the air inlet cylinder 2, the two parts are spliced together to form a complete hollow circular ring after being assembled, the bottom of the hollow ring 18 is communicated with a communication pipe 19, a first one-way valve 20 is arranged in the communication pipe 19, the first one-way valve 20 is arranged to ensure that other filling liquid such as non-setting adhesive can only enter the hollow ring 18 through the communication pipe 19 and can not flow backwards, the communication pipe 19 is communicated with the storage tank 21, a piston plate 22 is movably arranged in the storage tank 21, and the shape of the piston plate 22 is the piston plate 22, The size of the piston plate 22 is completely the same as the shape and size of the inner cavity of the storage box 21, so that the piston plate 22 can move along the inner wall of the storage box 21, the inner cavity surrounded by the top of the piston plate 22 and the storage box 21 is filled with other filling liquid such as adhesive sticker and the like for plugging the gap of the first sealing device 3 to prevent further gas leakage, a compression spring 23 is connected between the bottom of the piston plate 22 and the bottom wall of the storage box 21, the bottom of the storage box 21 is communicated with a hard tube 25 through an elastic communication tube 24, the elastic communication tube 24 is arranged in a long way, the hard tube 25 is embedded in the anti-collision plate 8, the hard tube 25 is communicated with an elastic hose 26, the elastic hose 26 can be stretched, extended and extruded and shortened, one end of the elastic hose 26 far away from the hard tube 25 covers the outer side of the first sealing device 3, a linkage moving device is arranged in the hard tube 25 and can move in the hard tube 25, the main effect of linkage mobile device is that promote the sealing gas in the hard pipe 25, and one side that elastic hose 26 was kept away from to hard pipe 25 is provided with one-way hot blast blowpipe apparatus, and the intercommunication is provided with excessive pressure exhaust apparatus on elastic hose 26, and when the gas pressure in elastic hose 26 was too big, excessive pressure exhaust apparatus will be opened in order to carry out the exhaust pressure release automatically, and then keeps atmospheric pressure stable, uses safelyr.

Example two:

the utility model provides a laser cutting head, including nozzle block 1, open in nozzle block 1 and be equipped with laser hole 101, be provided with air inlet cylinder 2 on the nozzle block 1, and be provided with first sealing device 3 between nozzle block 1 and the air inlet cylinder 2, the last inlet port 201 of having seted up of air inlet cylinder 2, be provided with condenser lens seat 4 on the air inlet cylinder 2, there is fixed condensing lens 5 that is provided with in the bottom of condenser lens seat 4, be provided with on the condenser lens seat 4 and gather focal tube 6, and be provided with second sealing device 7 between condenser lens seat 4 and the focal tube 6, and the same way, in this embodiment, first sealing device 3 and second sealing device 7 all can adopt sealed pad structure.

The side surface of the air inlet cylinder 2 is provided with a plurality of operation holes 202, the operation holes 202 are movably inserted with anti-collision plates 8, the anti-collision plates 8 are respectively provided with a first through hole 801 and a second through hole 802, the anti-collision plates 8 in the operation holes 202 are fixedly provided with connecting blocks 9, the connecting blocks 9 are fixedly provided with plugging plates 10, the shapes and the sizes of the plugging plates 10 are completely the same as those of the cross sections of the operation holes 202, so that the plugging plates 10 can move along the inner walls of the operation holes 202, the sealing performance is good, the plugging plates 10 are connected to fixing blocks 12 through tension springs 11, the fixing blocks 12 are fixedly arranged in the operation holes 202, the anti-collision plates 8 are provided with limit grooves 803, the operation holes 202 are fixedly provided with stop blocks 13, and the stop blocks 13 are correspondingly arranged in the limit grooves 803, thereby the moving amplitude of the anti-collision plates 8 can be limited, and the anti-collision plates 8 are prevented from falling off, the lifting switch 14 is fixedly arranged in the operation hole 202, the anti-collision plate 8 can trigger the lifting switch 14 when moving, the first indication rod 15 and the second indication rod 16 are fixedly arranged on the outer side surface of the nozzle block 1, the first indication rod 15 can penetrate out of the first through hole 801, the second indication rod 16 can penetrate out of the second through hole 802, in the embodiment, the length of the first indication rod is larger than that of the second indication rod, the first indication rod 15 and the second indication rod 16 are coated with different colors, the operation hole is more visual and easy to distinguish, and when the outward ejection amplitude of the anti-collision plate 8 is gradually reduced, the first indication rod 15 and the second indication rod 16 can be sequentially exposed, the air leakage degree is sequentially indicated, and the operation hole is more visual.

A plurality of extrusion pipes 17 are communicated and arranged on the outer side of the first sealing device 3, the extrusion pipes 17 are all communicated with a hollow ring 18, a communicating pipe 19 is communicated and arranged at the bottom of the hollow ring 18, a first one-way valve 20 is arranged in the communicating pipe 19, the communicating pipe 19 is communicated with a storage tank 21, a piston plate 22 is movably arranged in the storage tank 21, a compression spring 23 is connected and arranged between the bottom of the piston plate 22 and the bottom wall of the storage tank 21, the bottom of the storage tank 21 is communicated with a hard pipe 25 through an elastic communicating pipe 24, the hard pipe 25 is embedded in an anti-collision plate 8, an elastic hose 26 is communicated and arranged on the hard pipe 25, one end of the elastic hose 26 far away from the hard pipe 25 is covered on the outer side of the first sealing device 3, a linkage moving device is arranged in the hard pipe 25 and can move in the hard pipe 25, a one-way air inlet device is arranged on one side of the hard pipe 25 far away from the elastic hose 26, an overpressure exhaust device is communicated and arranged on the elastic hose 26, similarly, when the pressure of the air in the flexible hose 26 is too high, the overpressure exhaust device will automatically open to exhaust and release the air, so as to keep the air pressure stable and make the use safer.

Example three:

in this embodiment, on the basis of the first embodiment or the second embodiment, the specific structure of the linkage moving device is further disclosed and defined: the linkage moving device comprises an inner push plate 27 and an outer push plate 29, the shape and the size of the inner push plate 27 and the outer push plate 29 are completely the same as the shape and the size of the section of the hard tube 25, therefore, the inner push plate 27 and the outer push plate 29 can move along the inner wall of the hard tube 25, the sealing performance is good, the gas on the two sides is effectively prevented from flowing, the connecting rod 28 is fixedly arranged between the inner push plate 27 and the outer push plate 29, the limiting block 30 is fixedly arranged in the hard tube 25, and the limit block 30 is positioned between the inner push plate 27 and the outer push plate 29, the limit block 30 limits the moving amplitude of the inner push plate 27 and the outer push plate 29, a return spring 31 is connected between one side of the inner push plate 27 far away from the connecting rod 28 and the side wall of the hard pipe 25, when no external force is applied, the restoring spring 31 can push the inner push plate 27 and the outer push plate 29 back to the initial position, so that the restoring is realized.

Example four:

the embodiment further discloses and limits the specific structure of the unidirectional air intake device on the basis of the first embodiment or the second embodiment: the one-way air inlet device comprises an air supply pipe 32, the air supply pipe 32 is embedded in the anti-collision plate 8, a second one-way valve 33 is arranged in the air supply pipe 32, and the arrangement of the second one-way valve 33 enables external air to enter the inner cavity of the hard pipe 25 only through the air supply pipe 32 and not to flow back.

Example five:

in this embodiment, on the basis of the first or second embodiment, the specific structure of the overpressure exhaust apparatus is further disclosed and defined: overpressure exhaust apparatus includes blast pipe 34, and blast pipe 34 intercommunication sets up on elastic hose 26, is provided with relief valve 35 on blast pipe 34, and when the gas pressure in elastic hose 26's the lumen was great, relief valve 35 can be opened automatically in order to carry out the exhaust pressure release, avoids appearing the potential safety hazard.

A laser cutting device comprises the laser cutting head.

The working principle is as follows: when the nozzle block 1 and the air inlet cylinder 2 are installed, the nozzle block 1 and the air inlet cylinder 2 are taken, the first sealing device 3 is taken and placed at the connecting position of the nozzle block 1 and the air inlet cylinder 2, and the air inlet cylinder 2 is screwed down to realize the first-step installation; the extrusion pipe 17 and the hollow ring 18 both comprise two parts, one part is positioned in the nozzle block 1, the other part is positioned in the air inlet cylinder 2, the nozzle block 1 and the air inlet cylinder 2 are respectively provided with a semi-ring of the hollow ring 18, the two parts are spliced together to form a complete hollow circular ring after being assembled, the condenser lens base 4 is placed in the air inlet cylinder 2, the condenser lens 5 is aligned with the laser hole 101, the condenser tube 6 is finally taken, the second sealing device 7 is placed between the condenser lens base 4 and the focusing tube 6, the condenser tube 6 is screwed, the second-step installation is realized, and the first sealing device 3 and the second sealing device 7 in the initial state both play a good sealing role.

In the actual use process, the use situation of the laser cutting head can be divided into the following cases:

the first situation is as follows: when the laser cutting head is stood or is moving the cutting, if material or other structures collide to the nozzle block 1, then at first can strike the crashproof board 8, make crashproof board 8 move to the inboard, crashproof board 8 at this moment can promote shutoff board 10 through connecting block 9, until contacting lifting switch 14, lifting switch 14 and external hoisting device signal connection, when lifting switch 14 is triggered by the contact, external hoisting device can shift up the laser cutting head wholly, avoid the foreign object to cause the damage to external hoisting device striking, effectively protect nozzle block 1 on the cutting head.

Case two: during normal use, gas can be constantly let in the inlet hole 201 of air inlet section of thick bamboo 2, and gas finally can be followed laser hole 101 and erupted, supplementary laser cutting. When the overall sealing performance of the cutting head is good, gas flows towards the laser hole 101 and the operation hole 202, and the gas flow in the operation hole 202 sequentially passes through the blocking plate 10 and the connecting block 9 to push the anti-collision plate 8 outwards, so that the anti-collision plate 8 is pushed out, and at the moment, the first indicating rod 15 and the second indicating rod 16 cannot be observed, which indicates that gas leakage does not exist, the amount of oxygen ignited in unit time is kept stable, more heat energy is generated by the oxygen ignited, and the cutting effect is good.

Case three: after the sealing device is used for a period of time, if the first sealing device 3 is aged and notched, gas can be blown out through the position, and after passing through the elastic hose 26, the gas is blown to the outer push plate 29 in the hard tube 25, the outer push plate 29 pushes the inner push plate 27 through the connecting rod 28, the gas in the hard tube 25 is extruded into the inner cavity of the storage box 21 through the elastic communicating tube 24, the gas pushes the piston plate 22, and other filling liquids such as adhesive sticker are filled in the inner cavity enclosed by the top of the piston plate 22 and the storage box 21, so that the piston plate 22 can extrude the adhesive sticker, the adhesive sticker sequentially passes through the communicating tube 19, the hollow ring 18 and the extrusion tube 17 and then fills the notch of the first sealing device 3, thereby realizing self-sealing, avoiding gas leakage, keeping the amount of oxygen ignited in unit time stable, generating more heat energy by igniting the oxygen, and achieving good cutting effect.

Case four: after the laser cutting head is used for a period of time, if other sealing elements except the first sealing device 3, for example, the second sealing device 7 and the like are aged and notched, the amount of gas blown to the operation hole 202 is reduced, so that the outward ejection amplitude of the anti-collision plate 8 is reduced, if the air leakage amount is smaller, the first indicating rod 15 with a slightly larger length firstly penetrates through the first through hole 801, so as to indicate a user, along with the increase of the air leakage amount, the second indicating rod 16 with a slightly smaller length also penetrates through the second through hole 802, which indicates that the air leakage amount is further increased, and the maintenance treatment needs to be performed in time, and the first indicating rod 15 and the second indicating rod 16 are coated with different colors, so that the laser cutting head is easy to distinguish, more intuitive and convenient, does not need complicated maintenance steps, and is easy to judge the performance condition of the current laser cutting head.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A laser cutting head comprising a nozzle block (1), characterized in that: a laser hole (101) is formed in the nozzle block (1), an air inlet cylinder (2) is arranged on the nozzle block (1), a first sealing device (3) is arranged between the nozzle block (1) and the air inlet cylinder (2), an air inlet hole (201) is formed in the air inlet cylinder (2), a condenser lens base (4) is arranged on the air inlet cylinder (2), a condenser lens (5) is fixedly arranged at the bottom of the condenser lens base (4), a condenser tube (6) is arranged on the condenser lens base (4), and a second sealing device (7) is arranged between the condenser lens base (4) and the condenser tube (6);

the side surface of the air inlet cylinder (2) is provided with a plurality of operation holes (202), an anti-collision plate (8) is movably inserted into each operation hole (202), each anti-collision plate (8) is provided with a first through hole (801) and a second through hole (802), a lifting switch (14) is fixedly arranged in each operation hole (202), the anti-collision plate (8) can trigger the lifting switch (14) when moving, a first indication rod (15) and a second indication rod (16) are fixedly arranged on the outer side surface of the nozzle block (1), the first indication rod (15) can penetrate through the first through hole (801), and the second indication rod (16) can penetrate through the second through hole (802);

the outside intercommunication of first sealing device (3) is provided with a plurality of extrusion pipes (17), extrusion pipe (17) all communicate in cavity ring (18), the bottom intercommunication of cavity ring (18) is provided with communicating pipe (19), be provided with first check valve (20) in communicating pipe (19), communicating pipe (19) communicate in storage box (21), the activity is provided with piston plate (22) in storage box (21), it is provided with compression spring (23) to connect between the bottom of piston plate (22) and storage box (21) diapire, the bottom of storage box (21) communicates in hard pipe (25) through elasticity communicating pipe (24), the embedded setting of hard pipe (25) is in crashproof board (8), the intercommunication is provided with elastic hose (26) on hard pipe (25), elastic hose (26) keep away from the one end cover of hard pipe (25) in the outside of first sealing device (3), the air purifier is characterized in that a linkage moving device is arranged in the hard tube (25) and can move in the hard tube (25), a one-way air inlet device is arranged on one side, away from the elastic hose (26), of the hard tube (25), and an overpressure exhaust device is communicated with the elastic hose (26).

2. A laser cutting head according to claim 1, wherein: the anti-collision device is characterized in that a connecting block (9) is fixedly arranged on the anti-collision plate (8) in the operating hole (202), a blocking plate (10) is fixedly arranged on the connecting block (9), the blocking plate (10) is connected to a fixing block (12) through an extension spring (11), and the fixing block (12) is fixedly arranged in the operating hole (202).

3. A laser cutting head according to claim 1, wherein: the anti-collision plate (8) is provided with a limiting groove (803), a blocking block (13) is fixedly arranged in the operation hole (202), and the blocking block (13) is correspondingly arranged in the limiting groove (803).

4. A laser cutting head according to claim 1, wherein: linkage mobile device includes interior push pedal (27) and push pedal (29) outward, it is provided with connecting rod (28) to fix between interior push pedal (27) and push pedal (29), fixed stopper (30) of being provided with in hard pipe (25), and stopper (30) are located between push pedal (27) and push pedal (29) outward, it is provided with between one side and hard pipe (25) the lateral wall of connecting rod (28) to connect and is provided with reset spring (31) to interior push pedal (27).

5. A laser cutting head according to claim 1, wherein: the one-way air inlet device comprises an air supply pipe (32), the air supply pipe (32) is embedded in the anti-collision plate (8), and a second one-way valve (33) is arranged in the air supply pipe (32).

6. A laser cutting head according to claim 1, wherein: the overpressure exhaust device comprises an exhaust pipe (34), the exhaust pipe (34) is communicated with the elastic hose (26), and a pressure release valve (35) is arranged on the exhaust pipe (34).

7. A laser cutting device, characterized in that: comprising a laser cutting head according to any of the preceding claims 1-6.