Laser cutting machine

Abstract

The laser cutting machine relates to the technical field of laser cutting equipment, including a laser head, a slag extraction pipe and a feeding drive device. The slag extraction pipe extends into the metal pipe and is provided with a slag extraction port aligned with the cutting position. The slag extraction port extracts the residue generated during laser cutting. The laser cutting machine also includes a pipe clamping device and a finished product conveyor belt. The finished pipe is still sleeved on the slag extraction pipe after being cut from the metal pipe. When the metal pipe is driven forward by the feeding drive device to feed, the finished pipe is pushed forward along the slag extraction pipe to the finished product conveyor belt. When the finished product conveyor belt conveys the finished pipe to the rear end of the pipe clamping device, the pipe clamping device loosens the slag extraction pipe to release the finished pipe. After the finished pipe passes through, the pipe clamping device re-clamps the slag extraction pipe. After the finished pipe passes through all the pipe clamping devices, it is separated from the slag extraction pipe to complete the unloading. The slag extraction pipe does not need to be extracted from the finished pipe during the unloading process. The next section can be cut immediately after the feeding is completed. The unloading process does not consume extra time, thereby improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of laser cutting equipment, and in particular to a laser cutting machine. Background Art

[0002] Furniture is generally divided into office furniture and home furniture. Regardless of the type of furniture, it is usually mainly assembled from wood panels and metal accessories. Metal pipes are common accessories in various types of furniture. According to needs, square pipes, round pipes or other shapes of pipes are used. Metal pipes are usually made by pipe making machines or extrusion molding. They are long. When producing furniture, according to the design of the furniture, it is necessary to cut the long metal pipe raw materials into shorter pipe finished products.

[0003] A laser cutting machine is a device that uses a high-energy-density laser beam to cut objects. Cutting metal pipes is one of the application scenarios. It achieves cutting by focusing the laser beam on the surface of the pipe to quickly heat the material to the melting point or boiling point. In the process of cutting metal pipes, the laser cutting machine will produce a large amount of splashing residue. After cooling, the residue will adhere to the surface of the inner wall of the pipe. It is difficult to go deep into the inner wall to clean the residue, and the subsequent cleaning will also cause certain damage to the surface of the inner wall. In the prior art, during laser cutting, a slag extraction pipe is usually set to extend from the inside of the metal pipe to the cutting position to absorb the splashing residue to prevent the residue from splashing and adhering to the inner wall of the pipe. However, after the cutting is completed, the slag extraction pipe needs to be pulled out of the cut pipe before the material can be unloaded. After the unloading is completed, it needs to be re-extended into the next section of the pipe, which is time-consuming and reduces production efficiency. Summary of the invention

[0004] In view of this, the present invention provides a laser cutting machine, which does not need to extract the slag extraction pipe from the finished pipe after completing the cutting of a section of finished pipe, and can then cut the next section of finished pipe, thereby improving production efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solutions.

[0006] A laser cutting machine is used to cut hollow metal pipes, comprising a laser head, a slag extraction pipe and a feed drive device, wherein the slag extraction pipe is provided with a slag extraction port, the slag extraction pipe extends into the metal pipe, the slag extraction port is aligned with the cutting position of the metal pipe to extract the residue generated during laser cutting, and the feed drive device is used to drive the metal pipe to advance and feed, and the laser cutting machine also comprises:

[0007] At least two pipe clamping devices are provided at intervals to clamp or loosen the slag extraction pipe;

[0008] Finished product conveyor belt, used to convey finished pipe products cut from metal pipes;

[0009] Lifting device, used to drive the finished product conveyor belt up or down to adapt to metal pipes of different diameters;

[0010] After the finished pipe is cut from the metal pipe, it is still mounted on the slag extraction pipe. When the metal pipe is driven forward by the feeding drive device to feed, the finished pipe is pushed forward along the slag extraction pipe to the finished product conveyor belt. When the finished pipe conveyor belt conveys the finished pipe to the rear end of the pipe clamping device, the pipe clamping device releases the slag extraction pipe to release the finished pipe. After the finished pipe passes through, the pipe clamping device re-clamps the slag extraction pipe. After the finished pipe passes through all the pipe clamping devices, it is separated from the slag extraction pipe to complete the unloading.

[0011] After a section of finished pipe is cut, the slag extraction pipe does not need to be extracted from the finished pipe during the unloading process, but remains stationary throughout the process. By setting multiple pipe clamping devices and enabling the pipe clamping devices to automatically release the finished pipe, when one of the pipe clamping devices releases the finished pipe, the other pipe clamping devices keep the slag extraction pipe fixed, thereby not affecting the fixation of the slag extraction pipe. Therefore, after a section of finished pipe is cut, the feeding drive device immediately drives the metal pipe to feed, and the next section can be cut immediately after the feeding is completed. The unloading process does not consume extra time, thereby improving production efficiency.

[0012] Furthermore, the laser cutting machine also includes a transfer device for transferring the finished pipe product, and the transfer device includes:

[0013] A transfer conveyor belt, which is located below the cutting position and connected to the finished product conveyor belt to support and transfer the cut pipe products. The transfer conveyor belt can circulate and is provided with a plurality of electromagnetic clamping components, which can clamp or release the metal pipes and pipe products in contact;

[0014] The avoidance component is used to drive the transfer conveyor belt to move up and down;

[0015] When the metal pipe is cut, the avoidance component drives the transfer conveyor belt to move up and down to avoid the metal pipe rotating when being cut. After the finished pipe is cut, the electromagnetic clamping component in contact with the metal pipe clamps the metal pipe, and the electromagnetic clamping component in contact with the finished pipe clamps the finished pipe to fix the relative position of the metal pipe and the finished pipe.

[0016] When the feed drive device drives the metal pipe to feed, the metal pipe pushes the transfer conveyor belt to rotate, and the transfer conveyor belt simultaneously drives the finished pipe to move forward along the slag extraction pipe. When the finished pipe moves forward to the preset position of the transfer conveyor belt, the electromagnetic suction component releases the finished pipe so that the finished pipe can be transferred to the finished product conveyor belt.

[0017] Furthermore, the electromagnetic clamping assembly comprises:

[0018] An installation base, which is fixedly installed on the transfer conveyor belt;

[0019] An electromagnetic slider is slidably connected to the mounting base so as to be able to slide up and down relative to the mounting base;

[0020] When the electromagnetic slider is powered on, the electromagnetic slider can slide up relative to the mounting base under the action of magnetic force to fit and tightly absorb the surface of the suspended metal pipe or the finished pipe product.

[0021] Furthermore, the transfer conveyor belt is also provided with a scraping assembly, which comprises:

[0022] A fixed scraper, used to scrape off the residue adsorbed on the electromagnetic slider, is located below the transfer conveyor belt;

[0023] The slag suction channel is used to suck away the residue scraped off by the fixed scraper;

[0024] When the electromagnetic slider passes by the fixed scraper, the electromagnetic slider is powered off and demagnetized, and the fixed scraper contacts the adsorption surface of the electromagnetic slider to scrape off the residue on the adsorption surface, and the residue suction channel absorbs the residue.

[0025] Furthermore, the scraper assembly is also provided with a locking groove, and the electromagnetic slider is provided with a protrusion corresponding to the locking groove. When the electromagnetic slider passes through the fixed scraper, the protrusion enters the locking groove and slides to restrict the electromagnetic slider from sliding up and down.

[0026] Further, the pipe clamping device comprises:

[0027] A pipe clamping cylinder, comprising a clamping block for contacting the slag extraction pipe, wherein two pipe clamping cylinders are provided and symmetrically distributed on both sides of the slag extraction pipe;

[0028] A loosening trigger, which can be triggered by the finished pipe product to control the two pipe clamping cylinders to clamp or loosen;

[0029] When the finished product conveyor belt transports the finished pipe to the rear end of the pipe clamping device, the tension trigger of the pipe clamping device is triggered by the finished pipe and controls the two pipe clamping cylinders of the pipe clamping device to loosen to release the finished pipe. After the finished pipe passes, the tension trigger is triggered to control the pipe clamping cylinder to clamp, and the clamping block of the pipe clamping cylinder contacts and clamps the slag extraction pipe.

[0030] Furthermore, one of the pipe clamping devices is provided with an air suction port and is connected to an external air suction device, and the air suction port is connected to the slag suction pipe.

[0031] Furthermore, the laser cutting machine also includes a base, and the lifting device includes:

[0032] A first mounting seat, used for mounting the finished conveyor belt, which is slidably connected to the base;

[0033] A lifting cylinder fixedly connected to the first mounting seat;

[0034] The lifting cylinder can drive the first mounting seat to drive the finished product conveyor belt to rise or fall to adapt to metal pipes of different diameters.

[0035] Furthermore, the laser cutting machine further comprises a base, and the avoidance component comprises:

[0036] The second mounting seat is used to mount the transfer conveyor belt and is slidably connected to the base;

[0037] An avoidance cylinder, which is fixedly connected to the second mounting seat;

[0038] When the metal pipe is cut, the avoidance cylinder drives the second mounting seat to move up and down, so as to drive the transfer conveyor belt to move up and down to avoid the metal pipe rotating when being cut. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the three-dimensional structure of the laser cutting machine of the present invention.

[0040] Figure 2 This is a schematic diagram of the three-dimensional structure of the laser cutting machine of the present invention from another viewing angle (part of the structure has been hidden for the convenience of display).

[0041] Figure 3 for Figure 2 A magnified schematic diagram of center A.

[0042] Figure 4 It is a three-dimensional structural schematic diagram of the tube clamping device, transfer device and finished product conveyor belt.

[0043] Figure 5 It is a three-dimensional cross-sectional view of the tube clamping device, transfer device and finished product conveyor belt.

[0044] Figure 6 The laser cutting machine of the present invention is Figure 3 Cross-sectional view of the state.

[0045] Figure 7 for Figure 6 A magnified schematic diagram of point B in the middle.

[0046] Figure 8 for Figure 6 Enlarged schematic diagram of point C in the middle.

[0047] Fig. 9 It is a schematic diagram of the three-dimensional structure of the electromagnetic slider and the scraper assembly.

[0048] Fig.10 for Figure 5 Enlarged schematic diagram of point D in the middle.

[0049] Reference numerals include:

[0050] A tube clamping device 1, a tube clamping cylinder 11, a clamping block 111, an air exhaust port 112, a tension trigger 12, and a tube clamping bracket 13;

[0051] Lifting device 2, lifting cylinder 21, first mounting seat 22;

[0052] Transfer device 3, transfer conveyor belt 31, electromagnetic suction assembly 311, mounting base 3111, electromagnetic slider 3112, convex block 3113, slag scraping assembly 312, fixed scraper 3121, slag suction channel 3122, locking groove 3123, avoidance cylinder 32, second mounting seat 33;

[0053] Finished product conveyor belt 4, laser head 5, slag extraction pipe 6, slag extraction port 61, feed drive device 7, metal pipe 8, finished pipe 9, base 10, and rotation drive device 14. DETAILED DESCRIPTION

[0054] The present invention is described in detail below in conjunction with specific embodiments.

[0055] Combination Figure 1-Figure 4 The laser cutting machine of this embodiment includes a laser head 5, a slag extraction pipe 6, a feed drive device 7, a base 10 and a rotation drive device 14. Figure 6-Figure 7 The slag extraction pipe 6 is provided with a slag extraction port 61, which extends into the metal pipe 8. The slag extraction port 61 is aligned with the cutting position of the metal pipe 8 to extract the residue generated during laser cutting. The feed drive device 7 is used to drive the metal pipe 8 to feed forward, and the rotation drive device 14 is used to drive the metal pipe 8 to rotate. Figure 4-Figure 6 , the laser cutting machine of this embodiment also includes:

[0056] The pipe clamping device 1 of this embodiment is provided with three pipe clamping devices 1, which are fixed on the pipe clamping bracket 13 at intervals, and the pipe clamping bracket 13 is fixedly connected to the base 10. Each pipe clamping device 1 includes two pipe clamping cylinders 11 and two tension triggers 12, wherein the pipe clamping cylinder 11 also includes a clamping block 111 for contacting the slag extraction pipe 6, and the two pipe clamping cylinders 11 are symmetrically arranged on both sides of the slag extraction pipe 6, and the two tension triggers 12 are respectively installed at the rear end and the front end of the clamping block 111, and the tension trigger 12 can be an ultrasonic, infrared or magnetic induction sensor, etc. When it is detected that the finished pipe 9 reaches the rear end of the clamping block 111, the pipe clamping cylinder 11 is triggered to be loosened, and when it is detected that the finished pipe 9 leaves the front end of the clamping block 111, the pipe clamping cylinder 11 is triggered to be re-clamped;

[0057] Finished product conveyor belt 4, used for conveying finished pipe products 9 cut from metal pipes 8;

[0058] The lifting device 2 includes a first mounting seat 22 and a lifting cylinder 21. The first mounting seat 22 is used to mount the finished product conveyor belt 4, which is slidably connected to the base 10. The lifting cylinder 21 is fixedly connected to the first mounting seat 22 and the base 10. The lifting cylinder 21 drives the finished product conveyor belt 4 to rise or fall by driving the first mounting seat 22 to adapt to metal pipes 8 of different diameters.

[0059] After the finished pipe 9 is cut from the metal pipe 8, it is still sleeved on the slag extraction pipe 6. When the metal pipe 8 is driven forward by the feeding drive device 7 to feed, the finished pipe 9 is pushed to move forward along the slag extraction pipe 6 to the finished product conveyor belt 4. When the finished product conveyor belt 4 conveys the finished pipe 9 to the rear end of the clamping block 111, the tension trigger 12 of the pipe clamping device 1 is triggered to control the two pipe clamping cylinders 11 of the pipe clamping device 1 to loosen the slag extraction pipe 6 to release the finished pipe 9. After the finished pipe 9 passes through, the tension trigger 12 is triggered to control the pipe clamping cylinder 11 to clamp. The clamping block 111 of the pipe clamping cylinder 11 contacts and clamps the slag extraction pipe 6. After the finished pipe 9 passes through all the pipe clamping devices 1, it is separated from the slag extraction pipe 6 to complete the unloading.

[0060] By setting a plurality of pipe clamping devices 1 to fix the slag extraction pipe 6, and making the pipe clamping devices 1 automatically release the finished pipe 9, the slag extraction pipe 6 does not need to be pulled out from the finished pipe 9 during the unloading process of the finished pipe 9, but remains stationary throughout the process. When one pipe clamping device 1 releases the finished pipe 9, the other pipe clamping devices 1 keep fixing the slag extraction pipe 6, so as not to affect the fixing of the slag extraction pipe 6. After cutting a section of the finished pipe 9, the feeding drive device 7 immediately drives the metal pipe 8 to feed, and the next section can be cut immediately after the feeding is completed, so the unloading process does not consume extra time, thereby improving production efficiency.

[0061] Since the ends of the metal tube 8 and the finished tube 9 are still in a high temperature state after cutting, the ends of both are easily deformed and damaged during the process of the metal tube 8 contacting and pushing the finished tube 9. In the subsequent pushing, the adjacent finished tubes 9 will be further squeezed and collided, and the finished tube 9 may be deformed and damaged, resulting in a decrease in the quality of the finished tube 9. It is not suitable for product processing with high quality requirements. Figure 4-Figure 7 The laser cutting machine of this embodiment further includes a transfer device 3 for transferring the finished pipe product 9, and the transfer device 3 includes:

[0062] The transfer conveyor belt 31 is located below the cutting position and connected to the finished product conveyor belt 4 to support and transfer the cut finished pipe 9. It can circulate and is provided with a plurality of electromagnetic clamping components 311. The electromagnetic clamping components 311 include an electromagnetic slider 3112. The electromagnetic slider 3112 is connected to the mounting base 3111. When the power is on, the electromagnetic slider 3112 can clamp the metal pipe 8 and the finished pipe 9 in contact, and release it when the power is off. In addition to the electromagnetic slider 3112 in the form of an electromagnet, other magnetic materials that can be charged and discharged or vacuum suction cups can also be used to clamp the metal pipe 8 and the finished pipe 9;

[0063] The avoidance component is used to drive the transfer conveyor belt 31 to move up and down, and includes a avoidance cylinder 32 and a second mounting seat 33 for mounting the transfer conveyor belt 31, the second mounting seat 33 is slidably connected to the base 10, and the avoidance cylinder 32 is connected to the second mounting seat 33;

[0064] During the cutting process of the metal tube 8, the metal tube 8 needs to rotate so that the laser head 5 can cut different tube surfaces. When the metal tube 8 is driven to rotate by the rotation drive device 14, if the metal tube 8 is square, the avoidance cylinder 32 drives the transfer conveyor belt 31 to move up and down synchronously to avoid the metal tube 8 rotating during cutting; if the metal tube 8 is round, no avoidance is required. After the finished tube 9 is cut, the electromagnetic clamping component 311 in contact with the metal tube 8 clamps the metal tube 8, and the electromagnetic clamping component 311 in contact with the finished tube 9 clamps the finished tube 9 to fix the relative positions of the metal tube 8 and the finished tube 9;

[0065] When the feeding drive device 7 drives the metal pipe 8 to feed, the metal pipe 8 pushes the transfer conveyor belt 31 to rotate, and the transfer conveyor belt 31 simultaneously drives the finished pipe 9 to move forward along the slag extraction pipe 6. When the finished pipe 9 moves forward to the preset position of the transfer conveyor belt 31, the electromagnetic suction assembly 311 releases the finished pipe 9. At this time, a part of the finished pipe 9 is on the finished product conveyor belt 4, so that the finished pipe 9 can be transferred to the finished product conveyor belt 4. The cut finished pipe 9 is transferred by setting the transfer device 3, and the metal pipe 8 and the finished pipe 9 are sucked by the suction assembly, so that the metal pipe 8 and each finished pipe 9 remain relatively still during the transfer process, and the relative positions between the metal pipe 8 and the finished pipe 9 and between each finished pipe 9 are fixed, and a certain gap is always maintained, so as to avoid collision between the metal pipe 8 and the finished pipe 9, and between the finished pipe 9 and the finished pipe 9, which may cause deformation and damage to their ports.

[0066] When the surface of the metal pipe 8 or the finished pipe 9 is undulating or uneven, some electromagnetic clamping components 311 may be suspended between the metal pipe 8 or the finished pipe 9, without actual contact, adhesion and clamping, which may lead to insufficient magnetic force and slippage, and the relative position between the metal pipe 8 and the finished pipe 9 cannot be fixed, causing the metal pipe 8 to collide with the finished pipe 9 during feeding. Figure 7 As shown, the electromagnetic clamping assembly 311 also includes:

[0067] The mounting base 3111 is fixedly mounted on the transfer conveyor belt 31, and the electromagnetic slider 3112 is slidably connected to the mounting base 3111 so as to be able to slide up and down relative to the mounting base 3111;

[0068] When the electromagnetic slider 3112 is powered on, the electromagnetic slider 3112 can slide up relative to the mounting base 3111 under the action of magnetic force to fit and clamp the suspended metal pipe 8 or finished pipe 9 surface. By providing the electromagnetic slider 3112 that can slide up and down, the electromagnetic slider 3112 can automatically rise to fit the suspended metal pipe 8 or finished pipe 9 surface under the action of magnetic force when powered on, so that the electromagnetic slider 3112 can adaptively fit and clamp the surface of the metal pipe 8 or finished pipe 9, avoiding insufficient magnetic force caused by the clamping assembly and the metal pipe 8 or finished pipe 9 being suspended.

[0069] Since the electromagnetic slider 3112 easily absorbs the residue in the cutting environment, the residue will accumulate on the adsorption surface of the electromagnetic slider 3112, which may easily lead to poor contact between the electromagnetic slider 3112 and the metal pipe 8 and the finished pipe 9. The electromagnetic slider 3112 may not be able to tightly absorb the metal pipe 8 and the finished pipe 9. Figure 8 As shown, the transfer conveyor belt 31 is also provided with a scraper assembly 312, and the scraper assembly 312 includes:

[0070] A fixed scraper 3121, used to scrape off the residue adsorbed on the electromagnetic slider 3112, which is located below the transfer conveyor belt 31;

[0071] The slag suction channel 3122 is used to suck away the residue scraped off by the fixed scraper 3121, and is connected to an external air extraction device;

[0072] When the electromagnetic slider 3112 passes through the fixed scraper 3121, the electromagnetic slider 3112 is powered off and demagnetized, and the fixed scraper 3121 contacts the adsorption surface of the electromagnetic slider 3112, so that the residue on the adsorption surface is scraped off, and the scraping channel 3122 absorbs the scraped residue. The scraping assembly 312 is provided to remove the residue on the surface of the electromagnetic slider 3112, and the electromagnetic slider 3112 is powered off and demagnetized when passing through the fixed scraper 3121, so that the residue is easier to be scraped off, thereby avoiding the electromagnetic slider 3112 from having a poor contact with the metal pipe 8 and the finished pipe 9 due to the adsorption of residue.

[0073] Since the electromagnetic slider 3112 can slide up and down, when scraping the residue, the electromagnetic slider 3112 may jump up and down after being acted upon by the fixed scraper 3121, so that the residue cannot be scraped off. Fig. 9 As shown, the scraping assembly 312 is also provided with a locking groove 3123, and the electromagnetic slider 3112 is provided with a convex block 3113 corresponding to the locking groove 3123. When the electromagnetic slider 3112 passes through the fixed scraper 3121, the convex block 3113 enters the locking groove 3123 and slides, so as to restrict the electromagnetic slider 3112 from sliding up and down. By providing the locking groove 3123, the electromagnetic slider 3112 cannot move up and down after entering the locking groove 3123, thereby preventing the electromagnetic slider 3112 from jumping up and down after receiving the force of the fixed scraper 3121, so that the residue cannot be scraped off.

[0074] Although the slag extraction pipe 6 does not need to be extracted from the finished pipe 9 during the feeding process, the pipe clamping device 1 can release the finished pipe 9, but because the slag extraction pipe 6 needs to be connected to an external exhaust device for exhaust, the finished pipe 9 still needs to pass through the connection between the slag extraction pipe 6 and the external exhaust device. Figure 5 and Fig.10 As shown, an air suction port 112 is provided on the clamping block 111 of the pipe clamping cylinder 11 at the rear end of the finished product conveyor belt 4, wherein the air suction port 112 can be provided on the clamping of any pipe clamping cylinder 11, the air suction port 112 is connected to an external air suction device, and the air suction port 112 is connected to the slag extraction pipe 6. By providing the air suction port 112 connected to the slag extraction pipe 6 (i.e., the connection between the slag extraction pipe 6 and the external air suction device) on one of the pipe clamping devices 1, when the pipe clamping device 1 releases the slag extraction pipe 6 to release the finished pipe 9, the connection between the air suction port 112 and the slag extraction pipe 6 is also temporarily disconnected, which will not block the discharge of the finished pipe 9, and the finished pipe 9 can pass through the pipe clamping device 1 and the air suction port 112 together, and there is no need to set up a device to control the release and connection of the slag extraction pipe 6 and the external air suction device, thereby simplifying the equipment structure. Of course, it is also necessary to set the length of the transfer conveyor belt 31, the finished product conveyor belt 4 and the position of the pipe clamping device 1 with the exhaust port 112, so that the metal pipe 8 is being fed when the pipe clamping device 1 releases the finished pipe 9. The conveying speed of the finished product conveyor belt 4 is also faster than that of the transfer conveyor belt 31, so that the finished pipe 9 can pass through the pipe clamping device 1 quickly without consuming extra time.

[0075] The specific working process of the laser cutting machine in this embodiment is as follows:

[0076] When the metal pipe 8 is cut, the external exhaust device exhausts air, and the residue generated during cutting is sucked into the slag extraction pipe 6 from the slag extraction port 61 and extracted through the air extraction port 112, and the avoidance cylinder 32 drives the transfer conveyor belt 31 to move up and down synchronously to avoid the metal pipe 8 (square) rotating during cutting;

[0077] After being cut from the metal pipe 8, the finished pipe 9 falls onto the transfer device 3 and continues to be sleeved on the slag extraction pipe 6. The electromagnetic slider 3112 in contact with the metal pipe 8 sucks the metal pipe 8 tightly, and the electromagnetic slider 3112 in contact with the finished pipe 9 sucks the finished pipe 9 tightly.

[0078] When the feeding drive device 7 drives the metal pipe 8 to feed forward, the metal pipe 8 pushes the transfer conveyor belt 31 to rotate, and the transfer conveyor belt 31 simultaneously drives the finished pipe 9 to move forward along the slag extraction pipe 6 to the finished product conveyor belt 4;

[0079] When the finished product conveyor belt 4 conveys the finished pipe 9 to the rear end of the clamping block 111, the loosening trigger 12 of the clamping device 1 is triggered to control the two clamping cylinders 11 of the clamping device 1 to loosen the slag extraction pipe 6 to release the finished pipe 9. At this time, the metal pipe 8 is just being fed. After the finished pipe 9 passes through, the loosening trigger 12 is triggered to control the clamping cylinder 11 to clamp. The clamping block 111 of the clamping cylinder 11 contacts and clamps the slag extraction pipe 6. After the finished pipe 9 passes through all the clamping devices 1, it is separated from the slag extraction pipe 6 to complete the unloading.

[0080] When the electromagnetic slider 3112 passes the fixed scraper 3121, the protrusion 3113 enters the locking groove 3123 and slides, the electromagnetic slider 3112 is powered off and demagnetized, and the fixed scraper 3121 contacts the adsorption surface of the electromagnetic slider 3112, so that the residue on the adsorption surface is scraped off, and the residue suction channel 3122 absorbs the scraped residue.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A laser cutting machine for cutting hollow metal pipes, comprising a laser head, a slag extraction pipe and a feed drive device, wherein the slag extraction pipe is provided with a slag extraction port, the slag extraction pipe extends into the metal pipe, the slag extraction port is aligned with the cutting position of the metal pipe to extract the residue generated during laser cutting, and the feed drive device is used to drive the metal pipe to advance and feed, and is characterized in that include: At least two pipe clamping devices are provided at intervals to clamp or loosen the slag extraction pipe; Finished product conveyor belt, used to convey finished pipe products cut from metal pipes; Lifting device, used to drive the finished product conveyor belt up or down to adapt to metal pipes of different diameters; After the finished pipe is cut from the metal pipe, it is still placed on the slag extraction pipe. When the metal pipe is driven forward by the feeding drive device to feed, the finished pipe is pushed forward along the slag extraction pipe to the finished product conveyor belt. When the finished pipe conveyor belt conveys the finished pipe to the rear end of the pipe clamping device, the pipe clamping device releases the slag extraction pipe to release the finished pipe. After the finished pipe passes through, the pipe clamping device re-clamps the slag extraction pipe. After the finished pipe passes through all the pipe clamping devices, it is separated from the slag extraction pipe to complete the unloading. The pipe clamping device includes: A pipe clamping cylinder, comprising a clamping block for contacting the slag extraction pipe, wherein two pipe clamping cylinders are provided and symmetrically distributed on both sides of the slag extraction pipe; A loosening trigger, which can be triggered by the finished pipe product to control the two pipe clamping cylinders to clamp or loosen; When the finished product conveyor belt transports the finished pipe to the rear end of the pipe clamping device, the tension trigger of the pipe clamping device is triggered by the finished pipe and controls the two pipe clamping cylinders of the pipe clamping device to loosen to release the finished pipe. After the finished pipe passes, the tension trigger is triggered to control the pipe clamping cylinder to clamp, and the clamping block of the pipe clamping cylinder contacts and clamps the slag extraction pipe.

2. The laser cutting machine according to claim 1, characterized in that: Also included is a transfer device for transferring finished pipe products, the transfer device comprising: A transfer conveyor belt, which is located below the cutting position and connected to the finished product conveyor belt to support and transfer the cut pipe products. The transfer conveyor belt can circulate and is provided with a plurality of electromagnetic clamping components, which can clamp or release the metal pipes and pipe products in contact; The avoidance component is used to drive the transfer conveyor belt to move up and down; When the metal pipe is cut, the avoidance component drives the transfer conveyor belt to move up and down to avoid the metal pipe rotating when being cut. After the finished pipe is cut, the electromagnetic clamping component in contact with the metal pipe clamps the metal pipe, and the electromagnetic clamping component in contact with the finished pipe clamps the finished pipe to fix the relative position of the metal pipe and the finished pipe. When the feed drive device drives the metal pipe to feed, the metal pipe pushes the transfer conveyor belt to rotate, and the transfer conveyor belt simultaneously drives the finished pipe to move forward along the slag extraction pipe. When the finished pipe moves forward to the preset position of the transfer conveyor belt, the electromagnetic suction component releases the finished pipe so that the finished pipe can be transferred to the finished product conveyor belt.

3. The laser cutting machine according to claim 2, characterized in that: The electromagnetic clamping assembly includes: An installation base, which is fixedly installed on the transfer conveyor belt; An electromagnetic slider is slidably connected to the mounting base so as to be able to slide up and down relative to the mounting base; When the electromagnetic slider is powered on, the electromagnetic slider can slide up relative to the mounting base under the action of magnetic force to fit and tightly absorb the surface of the suspended metal pipe or the finished pipe product.

4. The laser cutting machine according to claim 3, characterized in that: The transfer conveyor belt is also provided with a scraping assembly, which includes: A fixed scraper, used to scrape off the residue adsorbed on the electromagnetic slider, is located below the transfer conveyor belt; A slag suction channel is used to suck away the residue scraped off by the fixed scraper, and is connected to an external air extraction device; When the electromagnetic slider passes through the fixed scraper, the electromagnetic slider is powered off and demagnetized, and the fixed scraper contacts the adsorption surface of the electromagnetic slider to scrape off the residue on the adsorption surface, and the residue suction channel absorbs the residue.

5. The laser cutting machine according to claim 4, characterized in that: The scraper assembly is also provided with a locking groove, and the electromagnetic slider is provided with a convex block corresponding to the locking groove. When the electromagnetic slider passes through the fixed scraper, the convex block slides into the locking groove to restrict the electromagnetic slider from sliding up and down.

6. The laser cutting machine according to claim 1, characterized in that: One of the pipe clamping devices is provided with an air suction port and is connected to an external air suction device, and the air suction port is connected to the slag suction pipe.

7. The laser cutting machine according to claim 1, characterized in that: Also comprising a base, the lifting device comprises: A first mounting seat, used for mounting the finished conveyor belt, which is slidably connected to the base; A lifting cylinder fixedly connected to the first mounting seat; The lifting cylinder can drive the first mounting seat to drive the finished product conveyor belt to rise or fall to adapt to metal pipes of different diameters.

8. The laser cutting machine according to claim 2, characterized in that: Also including the base, the avoidance assembly includes: The second mounting seat is used to mount the transfer conveyor belt and is slidably connected to the base; An avoidance cylinder, which is fixedly connected to the second mounting seat; When the metal pipe is cut, the avoidance cylinder drives the second mounting seat to move up and down, so as to drive the transfer conveyor belt to move up and down to avoid the metal pipe rotating when being cut.

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