Error-proof laser cutting machine

Abstract

This invention relates to an error-resistant laser cutting machine tool, belonging to the field of laser cutting machine manufacturing technology. It includes a laser cutting head and a machine bed frame. A movable beam is provided between the laser cutting head and the machine bed frame. The movable beam is connected to both the machine bed frame and the laser cutting head via a transmission system. The machine bed frame includes a pair of longitudinal beams, several transverse beams, and a worktable. The machine bed frame also includes an anti-collision module and a bottom rail assembly. The anti-collision module is installed inside the longitudinal beams, and the bottom rail assembly is located below the worktable. A multi-functional air duct module is provided inside the worktable. Overall, this invention has advantages such as good heat dissipation, reducing thermal deformation and ensuring processing accuracy; good chip removal effect to avoid mis-welding with sheet metal; and good structural stability.

Description

Technical Field

[0001] This invention relates to an error-resistant laser cutting machine tool, belonging to the field of laser cutting machine technology. Background Technology

[0002] A laser cutting machine is a device that uses a high-power-density laser beam to cut materials. It focuses the laser beam to bring the workpiece surface to its melting or boiling point, and then uses high-pressure gas to blow away the molten or vaporized material, achieving precise cutting. Laser cutting machines offer advantages such as high precision, high speed, smooth cuts, and a small heat-affected zone, and are widely used in the processing of various materials, including metals and non-metals, in industries such as automotive, machinery, and electronics. Furthermore, laser cutting machines are characterized by high automation and low processing costs, making them an indispensable piece of equipment in modern manufacturing.

[0003] When laser cutting machine tools operate continuously for a long time, the temperature of key components of the worktable, such as racks and support frames, can reach over 100°C due to the high temperature radiation of the laser and the heat generated by cutting the material. This can cause thermal deformation, leading to loss of precision control, mis-welding of chips and sheet metal that interferes with the cutting operation, structural instability defects, and an increased scrap rate.

[0004] Specifically, the following issues arise: The rack expands linearly due to heat, causing a shift in positioning coordinates. Conventional cooling methods cannot suppress overall structural deformation. After four hours of continuous cutting, the cumulative displacement error of the rack exceeds the allowable threshold for high-precision machining. The rigid connection constrains the thermal expansion of the worktable frame, generating internal stress that accelerates metal fatigue and even cracking. Simultaneously, the existing bottom rail sliding structure wears quickly and lacks sufficient deformation compensation. Molten slag splashes onto the rack surface, which is difficult to remove with conventional dust collection devices. High-temperature slag forms micro-welds upon contact with the sheet metal, easily causing cutting errors. The connection points between the crossbeam and longitudinal beams are subjected to alternating thermal stress. The screw-connected structure is prone to bending and deformation, leading to overall frame instability. Machine shutdown, disassembly, inspection, and repair are required, with an average fault recovery time exceeding eight hours, severely impacting processing efficiency. Furthermore, the worktable expansion lacks a graded limiting mechanism: rigid bed limiting accelerates fatigue, while lack of constraint results in excessive deformation. The existing bed structure has poor deformation control precision, failing to meet the demands of precision cutting. Summary of the Invention

[0005] In view of the defects existing in the prior art, the present invention provides an error-proof laser cutting machine tool, which solves the problems such as the laser cutting machine tool body being easily heated and causing thermal deformation leading to loss of precision control, debris and sheet metal mis-welding interfering with the cutting operation, and defects in structural stability.

[0006] The objective of this invention is achieved through the following technical solution, including a laser cutting head and a bed frame, wherein a movable beam is provided between the laser cutting head and the bed frame, and the movable beam is connected to both the bed frame and the laser cutting head by a transmission. The bed frame includes a pair of longitudinal beams, several transverse beams, and a worktable. The bed frame also includes an anti-collision module and a bottom rail assembly. The anti-collision module is installed inside the longitudinal beams, and the bottom rail assembly is located below the worktable. The worktable is equipped with a multi-functional air duct module.

[0007] Furthermore, the laser cutting head is mounted on the movable beam and slidably connected, and the movable beam is slidably connected to the bed frame.

[0008] Furthermore, the longitudinal beam includes a square tube steel beam, a supporting wall panel is provided on the outer side of the square tube steel beam, a support plate is provided on the top of the supporting wall panel, and a connecting support member is provided on the outer side of the supporting wall panel and the bottom of the square tube steel beam. The connecting support member is used to install the support leg on the longitudinal beam, and protective plates are also installed at both ends of the longitudinal beam.

[0009] Furthermore, the supporting wall panel, the square tube steel beam, the support plate, the connecting support member, and the protective plate are all connected by screws. The height of the protective plate does not exceed the height of the supporting wall panel, and the width of the protective plate does not exceed the width of the support plate. This facilitates the connection between the protective plate and the longitudinal beam, and forms an interception and limit on the workbench, reducing the displacement or expansion range of the workbench.

[0010] Furthermore, the workbench includes two longitudinal square tubes, each with a transverse square tube at both ends, which are connected by screws to form a rectangular frame. Several support bars are provided between the two transverse square tubes, and several racks are provided on the support bars at equal intervals. The two ends of the support bars are connected to the transverse square tubes by screws, and the racks are inserted into the support bars and fixed to the connectors by screws.

[0011] Furthermore, two of the support bars are respectively attached to the side of the longitudinal square tube to limit the two ends of the rack, so as to prevent the rack from bending at both ends due to squeezing the longitudinal square tube when it is heated and expanded. The support bar is provided with several slots for inserting the rack.

[0012] Furthermore, the multi-functional air duct module includes two air inlet pipes and two air outlet pipes, which are respectively inserted and installed at the ends of the longitudinal square tube. The inner side of the longitudinal square tube is provided with an I-shaped structural steel, the top and bottom of which are respectively attached to the top and bottom walls of the inner side of the longitudinal square tube. The multi-functional air duct module also includes several through holes, which are opened at the middle of the side of the longitudinal square tube near the workbench and downward, and their relative height does not exceed the height of the bottom surface of the support strip.

[0013] Furthermore, the air inlet and outlet pipes are equipped with insert sleeves on their inner sides, which are inserted into the inner side of the longitudinal square tube and fixed by screws. The I-shaped structural steel divides the longitudinal square tube into two air duct sections. The airflow in the section connected to the through hole rushes out at high speed through the through hole. During the cutting operation, the rack located directly above the through hole is cooled down, reducing the temperature of the rack and decreasing the probability of its thermal deformation. At the same time, the high-speed airflow can also blow the cutting debris off the rack, preventing the laser from welding the debris to the sheet metal and affecting the accuracy of the finished product. The high-speed airflow passing through the section not connected to the through hole absorbs and carries away the heat of the longitudinal square tube, cooling it down and reducing the probability of its thermal deformation. When the temperature is lower than that of the rack, the heat of the rack is transferred from high to low to the longitudinal square tube, forming a circulation.

[0014] Furthermore, the air inlet pipe is designed with a round pipe installed through the closed cover, and the air outlet pipe is designed with an air outlet opened through the middle of the closed cover.

[0015] Furthermore, a connecting pipe is provided through the protective plate at one end of the longitudinal square tube. The connecting pipe on the inner side of the protective plate is sleeved on the outside of the round pipe of the air inlet pipe and connected by insertion. An annular protective block is sleeved on the outside of the connecting pipe on the inner side of the protective plate. The width of the annular protective block is 1.1 to 1.25 times the width of the connecting pipe on the inner side of the protective plate. The connecting pipe is connected to an external fan through a pipe. A square hole is provided through the protective plate at one end of the longitudinal square tube. The size of the square hole is not smaller than the size of the air outlet of the air outlet pipe.

[0016] Furthermore, the annular protective block is fitted over the outside of the connecting pipe fitting. When the workbench is installed, it can prevent the longitudinal square tube from directly impacting the protective plate and causing damage when the connecting pipe fitting is connected to the round tube. The annular protective block has the function of preventing collision and stopping. The airflow generated by the fan flows through the connecting pipe fitting, the round tube, the longitudinal square tube, the air outlet, and the square hole before finally flowing to the outside.

[0017] Furthermore, the anti-collision module includes a support plate, a channel steel is provided on one side of the support plate, the open end of the channel steel is welded to the support plate, the height of the support plate is 1.5 to 2 times the length of the channel steel opening, a limiting strip is provided on one side of the bottom of the support plate, the limiting strip is fixed to the square tube steel beam by screws, one side of the limiting strip abuts against the support plate, and a limiting plate is fixedly provided at the bottom of the support plate, one side of the limiting plate abuts against the support plate.

[0018] Furthermore, when the workbench deforms due to heat, it will squeeze and collide with the anti-collision module. The U-shaped channel steel bears the pressure from the workbench while avoiding its own deformation, controlling and reducing the deformation of the workbench. The limiting strip and the limiting plate provide good support and balance for the supporting plate, preventing the supporting plate from tilting and affecting its pressure bearing and support effect on the workbench. The back height of the channel steel opening is not less than the height of the workbench to ensure good support, and a small gap is left between the back side of the channel steel and the workbench as a deformation allowance to prevent the workbench from being completely unable to deform, which would lead to metal fatigue and affect its service life.

[0019] Furthermore, the bottom rail assembly includes a load-bearing block, an installation groove is provided on the inner side of the load-bearing block, a high-hardness strip is provided on the top of the load-bearing block, and an insert strip is fixedly provided at the bottom of the high-hardness strip and the overall cross-section is T-shaped. The insert strip is inserted into the installation groove and fixed by screws, and the high-hardness strip is slidably connected to the bottom surface of the longitudinal square tube.

[0020] Furthermore, the load-bearing block is supported by the heavy pressure from the workbench, and the high-hardness slats serve as the contact surface. When the workbench deforms due to heat, the high-hardness slats slide on the surface of the high-hardness slats. The high-hardness slats can withstand a large number of frictions without damage, thus extending the maintenance and replacement cycle.

[0021] Furthermore, the crossbeam includes two square tube crossbeams, with several connecting square tubes welded together between the two crossbeams. A first connecting plate is fixed at both ends of each square tube crossbeam, and a second connecting plate of the same size is provided on the side of the first connecting plate. The second connecting plate is installed on the inner side of the square tube steel beam, and a transverse insert square tube is fixed on the second connecting plate. The insert square tube passes through the first connecting plate and is inserted into the inner side of the square tube crossbeam. The first connecting plate and the second connecting plate are connected by screws.

[0022] Furthermore, the insertable square tube is provided between the first connecting plate and the second connecting plate as a buffer structure. When the crossbeam is also deformed due to heat, a gap is generated between them, and the screws cannot bear the weight of the workbench above the crossbeam, so bending is inevitable. At this time, the square tube crossbeam slides and displaces in the insertable square tube, and the insertable square tube can provide a defensive support effect for the square tube crossbeam, reduce the weight borne by the connecting screws, reduce their bending probability, and maintain the stability of the overall structure.

[0023] Furthermore, an observation hole is provided on the outer side of the square tube beam, and the observation hole is located at the relative position after the insertable square tube is inserted into the square tube beam.

[0024] Furthermore, the observation hole is used to observe the position of the inserted square tube to determine whether the crossbeam has undergone thermal deformation.

[0025] In summary, compared with the prior art, the present invention has the following advantages:

[0026] 1. In this invention, by setting a multi-functional air duct module and partitioned airflow channels on the laser cutting machine tool body, the temperature gradient of key parts of the worktable is significantly reduced, the displacement error of the rack caused by high temperature expansion is reduced, and the effect of dual suppression of thermal deformation error is achieved. At the same time, the high-speed airflow removes cutting debris and avoids the accuracy deviation caused by the mis-welding of debris and sheet metal.

[0027] 2. In this invention, the U-shaped channel steel of the anti-collision module is matched with the reserved deformation gap to control the deformation when subjected to the expansion pressure of the workbench, so as to avoid metal fatigue caused by hard collision. The high hardness plate of the bottom rail assembly provides a low friction sliding surface, allowing the workbench to freely expand and contract longitudinally, eliminating the accumulation of thermal stress. The plug-in square tube structure of the crossbeam shares the load of the connection point, reduces the thermal expansion displacement of the crossbeam, maintains the stability of the overall frame, and forms a three-level deformation defense structure system.

[0028] 3. In this invention, the design of the support bar fitting the longitudinal square tube at both ends provides directional expansion space for the rack, avoids end bending and breakage, and extends the service life of the rack by more than 2 times. The through holes of the air duct module target air jet cooling, so that the working temperature of the rack is always maintained in a low range, suppressing deformation error from the source.

[0029] 4. In this invention, the buffer design of the annular protective block prevents the workbench from impacting the protective plate during installation, protects the air duct interface seal, reduces airflow efficiency loss, and the wear-resistant properties of the high-hardness slats reduce the frequency of bottom rail replacement and extend the maintenance cycle. The observation hole design enables visual monitoring of beam deformation, allowing operators to understand the degree of bed deformation in real time. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention;

[0031] Figure 2 This is a partial structural diagram of the bed frame of the present invention;

[0032] Figure 3 This is a schematic diagram of the workbench structure of the present invention;

[0033] Figure 4 This is an exploded view of a partial structure of the multifunctional air duct module of the present invention;

[0034] Figure 5 This is an exploded view of a partial structure of the present invention (A).

[0035] Figure 6 This is an exploded view of a partial structure of the present invention (B section).

[0036] Figure 7 This is a schematic diagram of the protective plate structure of the present invention;

[0037] Figure 8 This is a schematic diagram of the anti-collision module structure of the present invention;

[0038] Figure 9 This is an exploded view of a partial structure of the bottom rail assembly of the present invention;

[0039] Figure 10 This is a schematic diagram of the beam structure of the present invention.

[0040] In the diagram: 1-Laser cutting head, 2-Bed frame, 3-Moving beam;

[0041] 21-Longitudinal beam, 22-Crossbeam, 23-Workbench, 24-Anti-collision module, 25-Bottom rail assembly, 26-Multi-functional air duct module;

[0042] 2101-Square tube steel beam, 2102-Supporting wall panel, 2103-Bearing plate, 2104-Connecting support member, 2105-Protective plate, 2201-Square tube crossbeam, 2202-Connecting square tube, 2203-First connecting plate, 2204-Second connecting plate, 2205-Insertion square tube, 2206-Observation hole, 2301-Longitudinal square tube, 2302-Transverse square tube, 2303-Supporting strip, 2304-Rack, 2401-Support Vertical plate, 2402-channel steel, 2403-limiting strip, 2404-limiting plate, 2501-bearing block, 2502-installation groove, 2503-high hardness strip, 2504-plug strip, 2601-air inlet pipe fitting, 2602-air outlet pipe fitting, 2603-I-shaped structural steel, 2604-through hole, 2605-round pipe, 2606-air outlet, 2607-connecting pipe fitting, 2608-ring protective block, 2609-square hole. Detailed Implementation

[0043] The technical solution of the present invention will be further described in detail below through specific embodiments, but the present invention is not limited to these embodiments.

[0044] Combination Figures 1 to 10 The illustrated error-proof laser cutting machine tool includes a laser cutting head 1 and a bed frame 2. A movable beam 3 is provided between the laser cutting head 1 and the bed frame 2. The movable beam 3 is connected to the bed frame 2 and the laser cutting head 1 by a transmission. The bed frame 2 includes a pair of longitudinal beams 21, several transverse beams 22 and a worktable 23. The bed frame 2 also includes an anti-collision module 24 and a bottom rail assembly 25. The anti-collision module 24 is installed inside the longitudinal beams 21, and the bottom rail assembly 25 is located below the worktable 23. A multi-functional air duct module 26 is provided inside the worktable 23.

[0045] The laser cutting head 1 is mounted on the movable beam 3 and slidably connected, and the movable beam 3 is slidably connected to the bed frame 2.

[0046] Combination Figure 1 , Figure 2 As shown, the longitudinal beam 21 includes a square tube steel beam 2101. A support wall plate 2102 is provided on the outside of the square tube steel beam 2101. A support plate 2103 is provided on the top of the support wall plate 2102. A connecting support member 2104 is provided between the outside of the support wall plate 2102 and the bottom of the square tube steel beam 2101. The connecting support member 2104 is used to install the support leg on the longitudinal beam 21. Protective plates 2105 are also installed at both ends of the longitudinal beam 21.

[0047] The supporting wall panel 2102 is connected to the square tube steel beam 2101, the support plate 2103, the connecting support member 2104, and the protective plate 2105 by screws. The height of the protective plate 2105 does not exceed the height of the supporting wall panel 2102, and the width of the protective plate 2105 does not exceed the width of the support plate 2103. This facilitates the connection between the protective plate 2105 and the longitudinal beam 21, and forms an interception and limit on the workbench 23, reducing the displacement or expansion range of the workbench 23.

[0048] Combination Figure 3 As shown, the workbench 23 includes two longitudinal square tubes 2301. Both ends of the longitudinal square tubes 2301 are provided with transverse square tubes 2302 and are connected by screws to form a rectangular frame. Several support bars 2303 are provided between the two transverse square tubes 2302. Several racks 2304 are provided at equal intervals on the support bars 2303. Both ends of the support bars 2303 are connected to the transverse square tubes 2302 by screws. The racks 2304 are inserted into the support bars 2303 and fixed to the connectors by screws.

[0049] Two of the several support bars 2303 are respectively attached to the side of the longitudinal square tube 2301 to limit the two ends of the rack 2304. When the rack 2304 is heated and expanded, it is prevented from bending at both ends due to the compression of the longitudinal square tube 2301. The support bar 2303 is provided with several grooves for inserting the rack 2304.

[0050] Combination Figures 4 to 6 As shown, the multi-functional air duct module 26 includes two air inlet pipes 2601 and two air outlet pipes 2602. The air inlet pipes 2601 and the air outlet pipes 2602 are respectively inserted into the ends of the longitudinal square tube 2301. The inner side of the longitudinal square tube 2301 is provided with an I-shaped structural steel 2603. The top and bottom of the I-shaped structural steel 2603 are respectively attached to the top wall and bottom wall of the inner side of the longitudinal square tube 2301. The multi-functional air duct module 26 also includes several through holes 2604. The through holes 2604 are opened at the middle of the side of the longitudinal square tube 2301 near the workbench 23, and their relative height does not exceed the bottom height of the support bar 2303.

[0051] The inner sides of the air inlet fitting 2601 and the air outlet fitting 2602 are provided with insertion sleeves, which are inserted into the inner side of the longitudinal square tube 2301 and fixed with screws. The I-shaped structural steel 2603 divides the longitudinal square tube 2301 into two air duct sections. The airflow in the section connected to the through hole 2604 rushes out at high speed through the through hole 2604. During the cutting operation, the rack 2304 set directly above the through hole 2604 is cooled down to reduce its heat exposure. The probability of deformation is reduced, and the high-speed surging airflow can also blow the cutting debris off the rack 2304, preventing the laser from welding the debris to the sheet metal and affecting the accuracy of the finished product. The high-speed airflow passing through the area that is not connected to the through hole 2604 absorbs and carries away the heat of the longitudinal square tube 2301 to cool it down and reduce the probability of thermal deformation. When the temperature is lower than that of the rack 2304, the heat of the rack 2304 will be transferred from high to low to the longitudinal square tube 2301 to form a cycle.

[0052] Combination Figure 5 , Figure 6 As shown, the air inlet pipe 2601 is designed with a round pipe 2605 installed through the closed cover, and the air outlet pipe 2602 is designed with an air outlet 2606 opened through the middle of the closed cover.

[0053] Combination Figure 7As shown, a connecting pipe 2607 is provided through the protective plate 2105 at one end of the longitudinal square tube 2301. The connecting pipe 2607 on the inner side of the protective plate 2105 is sleeved on the outer side of the round tube 2605 of the air inlet pipe 2601 and connected by insertion. An annular protective block 2608 is installed on the outer side of the connecting pipe 2607 on the inner side of the protective plate 2105. The width of the annular protective block 2608 is 1.1 to 1.25 times the width of the connecting pipe 2607 on the inner side of the protective plate 2105. The connecting pipe 2607 is connected to the external fan through the pipe. A square hole 2609 is provided through the protective plate 2105 at one end of the longitudinal square tube 2301. The size of the square hole 2609 is not smaller than the size of the air outlet 2606 of the air outlet pipe 2602.

[0054] The annular protective block 2608 is fitted on the outside of the connecting pipe 2607. When installing the workbench 23, it can prevent the longitudinal square tube 2301 from directly hitting the protective plate 2105 and causing damage when the connecting pipe 2607 and the round tube 2605 are connected. The annular protective block 2608 plays the role of anti-collision and stopping. The airflow generated by the fan flows to the outside through the connecting pipe 2607, the round tube 2605, the longitudinal square tube 2301, the air outlet 2606, and the square hole 2609.

[0055] Combination Figure 2 , Figure 8 As shown, the anti-collision module 24 includes a support plate 2401. A channel steel 2402 is provided on one side of the support plate 2401. The open end of the channel steel 2402 is welded to the support plate 2401. The height of the support plate 2401 is 1.5 to 2 times the length of the opening of the channel steel 2402. A limiting strip 2403 is provided on one side of the bottom of the support plate 2401. The limiting strip 2403 is fixed to the square tube steel beam 2101 by screws. One side of the limiting strip 2403 abuts against the support plate 2401. A limiting plate 2404 is fixedly provided at the bottom of the support plate 2103. One side of the limiting plate 2404 abuts against the support plate 2401.

[0056] When the workbench 23 deforms due to heat, it will compress and collide with the anti-collision module 24. The U-shaped channel steel 2402 bears the pressure from the workbench 23 while avoiding its own deformation, thus controlling and reducing the deformation of the workbench 23. The limiting strip 2403 and the limiting plate 2404 provide good support and balance for the support plate 2401, preventing the support plate 2401 from tilting and affecting the pressure bearing and support effect on the workbench 23. The back side height of the opening of the channel steel 2402 is not less than the height of the workbench 23 to ensure good support. A small gap is left between the back side of the channel steel 2402 and the workbench 23 as a deformation allowance, to prevent the workbench 23 from being completely unable to deform, which would lead to metal fatigue and affect its service life.

[0057] Combination Figure 2 , Figure 9As shown, the bottom rail assembly 25 includes a load-bearing block 2501. The load-bearing block 2501 has an installation groove 2502 on its inner side. The top of the load-bearing block 2501 is provided with a high-hardness strip 2503. The bottom of the high-hardness strip 2503 is fixedly provided with an insertion strip 2504 and the overall cross-section is T-shaped. The insertion strip 2504 is inserted into the installation groove 2502 and fixed by screws. The high-hardness strip 2503 is slidably connected to the bottom surface of the longitudinal square tube 2301.

[0058] The load-bearing block 2501 bears the heavy pressure from the workbench 23 and supports it. The high-hardness slat 2503 serves as the contact surface. When the workbench 23 deforms due to heat, it slides on the surface of the high-hardness slat 2503. The high-hardness slat 2503 can withstand a large number of frictions without damage, thus extending the maintenance and replacement cycle.

[0059] Combination Figure 10 As shown, the crossbeam 22 includes two square tube crossbeams 2201. Several connecting square tubes 2202 are provided between the two square tube crossbeams 2201 and welded together. A first connecting plate 2203 is fixedly provided at both ends of the square tube crossbeam 2201. A second connecting plate 2204 of the same size is provided on the side of the first connecting plate 2203. The second connecting plate 2204 is installed on the inner side of the square tube steel beam 2101. A transverse insert square tube 2205 is fixedly provided on the second connecting plate 2204. The insert square tube 2205 passes through the first connecting plate 2203 and is inserted into the inner side of the square tube crossbeam 2201. The first connecting plate 2203 and the second connecting plate 2204 are connected by screws.

[0060] A square tube 2205 is provided between the first connecting plate 2203 and the second connecting plate 2204 as a buffer structure. When the crossbeam 22 is also deformed due to heat, a gap is generated between them. The screws cannot bear the weight of the workbench 23 above the crossbeam 22, and bending is inevitable. At this time, the square tube crossbeam 2201 slides in the square tube 2205. The square tube 2205 can provide defensive support for the square tube crossbeam 2201, reduce the weight borne by the connecting screws, reduce the probability of bending, and maintain the stability of the overall structure.

[0061] Combination Figures 1 to 8 As shown, an observation hole 2206 is also provided on the outside of the square tube beam 2201. The observation hole 2206 is located at the relative position after the inserted square tube 2205 is inserted into the square tube beam 2201.

[0062] The observation hole 2206 is used to observe the position of the inserted square tube 2205 to determine whether the crossbeam 22 has undergone thermal deformation.

[0063] Working principle: When the present invention is in use, the airflow from the fan enters the longitudinal square tube 2301 and is diverted by the I-beam 2603. The airflow is sprayed at high speed through the through hole 2604 onto the rack 2304, directly cooling the rack and blowing off cutting debris to prevent the debris from welding the sheet metal. At the same time, the high-speed airflow absorbs the heat of the longitudinal square tube 2301, reducing the overall temperature. The cooled square tube 2301 and the high-temperature rack 2304 form a temperature difference, which promotes the transfer of heat from the rack to the square tube, forming a circulating heat dissipation. When the rack 2304 expands due to heat, its end is protected by the support strip 2303 to avoid direct collision with the longitudinal square tube 2301 and thus avoid bending.

[0064] When the workbench 23 expands as a whole, the high-hardness strips 2503 of the bottom rail assembly 25 allow the longitudinal square tube 2301 to slide, the channel steel 2402 of the anti-collision module 24 restricts excessive displacement, and the reserved gap avoids metal fatigue. When the crossbeam 22 expands, the inserted square tube 2205 slides in the square tube crossbeam 2201 to share the load of the connecting screws and prevent bending.

[0065] The embodiments of the present invention are not limited to those described above. Without departing from the spirit and scope of the present invention, those skilled in the art can make various changes and improvements to the present invention in form and detail, and these are all considered to fall within the protection scope of the present invention.

Claims

1. An error-proof laser cutting machine tool, comprising a laser cutting head (1) and a bed frame (2), wherein a movable beam frame (3) is provided between the laser cutting head (1) and the bed frame (2), the movable beam frame (3) is connected to the bed frame (2) and the laser cutting head (1) by transmission, the bed frame (2) comprising a pair of longitudinal beams (21), a plurality of transverse beams (22) and a worktable (23), characterized in that: The bed frame (2) also includes an anti-collision module (24) and a bottom rail assembly (25). The anti-collision module (24) is installed inside the longitudinal beam (21), and the bottom rail assembly (25) is located below the workbench (23). The workbench (23) is equipped with a multi-functional air duct module (26). The longitudinal beam (21) includes a square tube steel beam (2101), a support wall plate (2102) is provided on the outside of the square tube steel beam (2101), a support plate (2103) is provided on the top of the support wall plate (2102), a connecting support member (2104) is provided on the outside of the support wall plate (2102) and the bottom of the square tube steel beam (2101), the connecting support member (2104) is provided for installing the support leg on the longitudinal beam (21), and protective plates (2105) are also installed at both ends of the longitudinal beam (21). The workbench (23) includes two longitudinal square tubes (2301). Both ends of the longitudinal square tubes (2301) are provided with transverse square tubes (2302) and are connected by screws to form a rectangular frame. Several support bars (2303) are provided between the two transverse square tubes (2302). Several racks (2304) are provided on the support bars (2303) at equal intervals. Both ends of the support bars (2303) are connected to the transverse square tubes (2302) by screws. The racks (2304) are inserted into the support bars (2303) and fixed to the connectors by screws. The multi-functional air duct module (26) includes two air inlet pipes (2601) and two air outlet pipes (2602). The air inlet pipes (2601) and the air outlet pipes (2602) are respectively inserted and installed at the ends of the longitudinal square tube (2301). The longitudinal square tube (2301) is provided with an I-shaped structural steel (2603) on the inner side. The top and bottom of the I-shaped structural steel (2603) are respectively attached to the top wall and bottom wall of the inner side of the longitudinal square tube (2301). The multi-functional air duct module (26) also includes several through holes (2604). The through holes (2604) are opened at the middle of the side of the longitudinal square tube (2301) near the workbench (23) and downward. Their relative height does not exceed the bottom height of the support bar (2303). The air inlet pipe (2601) is designed with a round pipe (2605) installed through the closed cover, and the air outlet pipe (2602) is designed with an air outlet (2606) opened through the middle of the closed cover; A connecting pipe (2607) is provided through the protective plate (2105) at one end of the longitudinal square tube (2301). The connecting pipe (2607) on the inner side of the protective plate (2105) is sleeved on the outside of the round tube (2605) of the air inlet pipe (2601) and connected by insertion. An annular protective block (2608) is sleeved and installed on the outside of the connecting pipe (2607) on the inner side of the protective plate (2105). The width of the block (2608) is 1.1 to 1.25 times the width of the connecting pipe (2607) on the inner side of the protective plate (2105). The connecting pipe (2607) is connected to the external fan through the pipe. A square hole (2609) is provided through the protective plate (2105) at one end of the longitudinal square tube (2301). The size of the square hole (2609) is not smaller than the size of the air outlet (2606) of the air outlet pipe (2602).

2. The anti-error laser cutting machine tool according to claim 1, characterized in that: The anti-collision module (24) includes a support plate (2401), a channel steel (2402) is provided on one side of the support plate (2401), the open end of the channel steel (2402) is welded to the support plate (2401), the height of the support plate (2401) is 1.5 to 2 times the opening length of the channel steel (2402), a limiting strip (2403) is provided on one side of the bottom of the support plate (2401), the limiting strip (2403) is fixed to the square tube steel beam (2101) by screws, one side of the limiting strip (2403) abuts against the support plate (2401), and a limiting plate (2404) is fixedly provided at the bottom of the support plate (2103), one side of the limiting plate (2404) abuts against the support plate (2401).

3. The error-resistant laser cutting machine tool according to claim 2, characterized in that: The bottom rail assembly (25) includes a load-bearing block (2501), an installation groove (2502) is provided on the inner side of the load-bearing block (2501), a high-hardness strip (2503) is provided on the top of the load-bearing block (2501), and a plug-in strip (2504) is fixedly provided at the bottom of the high-hardness strip (2503) and the overall cross-section is T-shaped. The plug-in strip (2504) is inserted into the installation groove (2502) and fixed by screws. The high-hardness strip (2503) is slidably connected to the bottom surface of the longitudinal square tube (2301).

4. The error-resistant laser cutting machine tool according to claim 3, characterized in that: The crossbeam (22) includes two square tube crossbeams (2201). Several connecting square tubes (2202) are provided between the two square tube crossbeams (2201) and welded together. A first connecting plate (2203) is fixed at both ends of the square tube crossbeam (2201). A second connecting plate (2204) of the same size is provided on the side of the first connecting plate (2203). The second connecting plate (2204) is installed on the inner side of the square tube steel beam (2101). A transverse insert square tube (2205) is fixed on the second connecting plate (2204). The insert square tube (2205) passes through the first connecting plate (2203) and is inserted into the inner side of the square tube crossbeam (2201). The first connecting plate (2203) and the second connecting plate (2204) are connected by screws.

5. The anti-error laser cutting machine tool according to claim 4, characterized in that: An observation hole (2206) is also provided on the outside of the square tube beam (2201). The observation hole (2206) is located at the relative position after the insertable square tube (2205) is inserted into the square tube beam (2201).

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