A laser cutting machine for processing a safe

Abstract

The application relates to the technical field of laser cutting machines, and relates to a laser cutting machine for safe box processing, which comprises a rack, a movable three-axis gantry is installed on the rack, a laser generator is detachably installed on the Z-axis of the three-axis gantry, the laser generator can move on the X, Y and Z axes within the range of the rack, a detachable air curtain device is arranged on the surface of the laser generator, the air curtain device comprises an outer ring body installed on the surface of the laser generator, an inner ring body is fixedly connected to the inner wall of the outer ring body through bolts, and a pressure stabilizing cavity is formed between the outer ring body and the inner ring body. The laser cutting machine can avoid the problems that the molten scraps and sparks with extremely high temperature are splashed outward, which can threaten the personal safety of surrounding operators, can cause ablation damage of the equipment body and surrounding precision components, and can further cause various safety production accidents.

Description

Technical Field

[0001] This invention belongs to the field of laser cutting machine technology, and specifically relates to a laser cutting machine for processing safes. Background Technology

[0002] A safe is a sealed storage device made of high-strength alloy plates, drill-proof and pry-proof steel plates, and an integrated welded or riveted structure. It is equipped with mechanical combination locks, electronic combination locks, fingerprint recognition, or composite locking systems, and has security protection functions such as anti-theft, fireproof, anti-smashing, anti-pry, and anti-technical opening. During the manufacturing process of a safe, a laser cutting machine is used to cut the plates used to manufacture the safe, so that the plates are processed into the required dimensions. The equipment usually uses a high-power fiber laser and a heavy-duty gantry frame, combined with a high-power servo drive and precision rack and pinion transmission, which has extremely strong thick plate cutting capabilities and can stably cut commonly used safe plates such as low-carbon steel, stainless steel, and high-strength wear-resistant steel plates.

[0003] In the initial processing stage of laser processing equipment for safe panels, when the laser generator nozzle initially approaches the workpiece but before the laser has fully penetrated it, the resulting high-temperature melting of the workpiece causes debris and sparks to splatter outwards over a wide area. These molten debris and sparks carry extremely high temperatures, posing a threat to the safety of nearby workers and causing burn damage to the equipment and surrounding precision components, potentially leading to various safety accidents. Furthermore, the splattered debris adheres to various areas of the panel, increasing the difficulty of subsequent cleaning. If the panel is not thoroughly cleaned, the remaining debris can interfere with the subsequent welding strength, reducing the protective performance of the processed safe. Summary of the Invention

[0004] The purpose of this invention is to provide a laser cutting machine for safe processing that is simple in structure and reasonably designed in order to solve the above problems.

[0005] The present invention achieves the above objectives through the following technical solutions: A laser cutting machine for safe processing includes a frame with a movable three-axis gantry mounted on it. A laser generator is detachably mounted on the Z-axis of the three-axis gantry. A gas supply assembly is provided inside the frame, allowing the laser generator to move along the X, Y, and Z axes within the frame. A detachable air curtain device is provided on the surface of the laser generator. The air curtain device includes an outer ring mounted on the surface of the laser generator. An inner ring is bolted to the inner wall of the outer ring. A pressure stabilizing chamber and an inner gas chamber are formed between the outer and inner rings. A connecting hole is provided on the outer ring to connect the inner gas chamber and the pressure stabilizing chamber, ensuring that gas in the pressure stabilizing chamber can flow into the inner gas chamber. An outer gas chamber is formed between the outer and inner rings. A connecting hole is provided on the inner ring to connect the outer gas chamber and the pressure stabilizing chamber, for supplying gas from the pressure stabilizing chamber to the outer gas chamber.

[0006] As a further optimization of the present invention, a first baffle ring is fixedly connected to the inner wall of the outer ring body. The first baffle ring is located below the gas outlet end of the first connection hole and is located inside the inner gas cavity. The outer edge of the first baffle ring is located inside the inner ring body. The first baffle ring can block the gas sent out from the first connection hole. A second baffle ring is fixedly connected to the inner wall of the outer ring body. The second baffle ring is located below the gas outlet end of the second connection hole and is located inside the outer gas cavity. The inner edge of the second baffle ring is located inside the inner ring body. The second baffle ring can block the gas sent out from the second connection hole.

[0007] As a further optimization of the present invention, the outer ring body has a threaded hole on its surface, and a pneumatic connector is threadedly sealed inside the threaded hole. The pneumatic connector is connected to the pressure stabilizing chamber to ensure that external gas can be delivered to the pressure stabilizing chamber. The outer ring body has a through hole on its surface, and a fixing bolt that penetrates the outer ring body is inserted into the through hole. The laser generator has a threaded groove on its surface, and the fixing bolt is threadedly connected to the inner wall of the threaded groove to ensure the firmness and stability of the outer ring body in the installed state. At the same time, it can facilitate the operator to disassemble the outer ring body during subsequent maintenance.

[0008] As a further optimization of the present invention, a sealing sleeve 1 and a sealing sleeve 2 are detachably installed between the inner ring body and the outer ring body to seal the contact surface between the outer ring body and the inner ring body, thereby ensuring the airtightness of the pressure stabilizing chamber, the outer air chamber and the inner air chamber. The sealing sleeve 1 has a round hole for the bolts that fix the inner ring body to pass through and install.

[0009] As a further optimization of the present invention, the laser generator is also provided with a gas supply auxiliary device. The gas supply auxiliary device includes a gas storage cylinder disposed on one side of the laser generator. A connecting component is installed on the interface of the gas storage cylinder. A pressure reducing valve is installed on the interface of the connecting component. A connecting pipe is fixedly connected between the pressure reducing valve and the pneumatic connector for supplying gas into the pressure stabilizing chamber.

[0010] As a further optimization of the present invention, the gas supply auxiliary device further includes an assembly frame fixed to the surface of the laser generator by screws, and an assembly ring is provided on the outer wall of the gas storage cylinder, and the assembly ring is fixedly connected to the upper surface of the assembly frame by screws.

[0011] As a further optimization of the present invention, the connecting assembly includes a three-way connector that is sealed and fixed to the gas cylinder interface. The three-way connector is threadedly sealed to the interface of the pressure reducing valve. A fixing ring is fixedly connected to the inner wall of the three-way connector, and a sealing plug is slidably connected to the inner wall of the three-way connector. The arc surface of the sealing plug has a guide groove for gas flow. A spring is fixedly connected between the fixing ring and the sealing plug. Under the restriction of the fixing ring, the spring can apply a pre-tightening force to the sealing plug, so that when the inlet pressure decreases, the sealing plug can block the inlet of the three-way connector to prevent backflow of gas in the gas cylinder. A pressure sleeve is threadedly sealed to the inner wall of the three-way connector. The pressure sleeve is in movable contact with the inclined surface of the sealing plug. The inclined surface of the sealing plug has a groove. A rubber ring is fixedly connected to the inner wall of the groove. The rubber ring is in movable contact with the inclined surface of the pressure sleeve, which can increase the sealing performance between the sealing plug and the pressure sleeve in the blocked state.

[0012] As a further optimization of the present invention, a protective device is provided on the surface of the outer ring body. The protective device includes an assembly frame, which is fixed to the surface of the outer ring body by an interference fit. A limiting component is installed on the inner wall of the assembly frame, and a cover is rotatably connected to the inner wall of the assembly frame. A positioning component that cooperates with the limiting component is provided on the inner wall of the assembly frame, and a sealing component that constrains the limiting component is also provided on the inner wall of the assembly frame.

[0013] As a further optimization of the present invention, the limiting component includes a rotating shaft detachably mounted between the assembly frame and the cover. The rotating shaft is rotatably connected to the inner wall of the assembly frame and fixedly connected to the cover by bolts. There are two rotating shafts, arranged symmetrically about the central axis of the cover. A stop strip is integrally formed on the surface of each rotating shaft, and a square hole is formed on the surface of the stop strip. A permanent magnet is fixedly connected to the inner wall of the square hole. The positioning component includes components fixed to the inner wall of the assembly frame. The C-shaped frame has air guide holes and a square groove on its upper surface. A permanent magnet two, matching a permanent magnet one, is fixedly connected in the square groove. When the permanent magnet one and the permanent magnet two are magnetically attracted, they can be used with a rotating shaft to restrict the position of the cover. The sealing assembly includes a sealing plug that is threadedly connected to the assembly frame. The surface of the sealing plug has an air inlet hole that matches the air guide holes and is used to deliver air into the cavity of the air guide holes. The side surface of the sealing plug has a fixing groove, and a rubber gasket is fixedly connected in the fixing groove.

[0014] As a further optimization of the present invention, the cover moves in contact with the surface of the outer ring body. At this time, the cover is in a blocking state, which can protect the outer ring body, inner ring body and laser generator outlet when not in operation. The baffle is rotatably sealed to the inner wall of the assembly frame. The air guide hole is connected to the cavity inside the assembly frame, so that the gas delivered by the air inlet can enter the cavity of the assembly frame, thereby pushing the baffle located in the cavity to move. The sealing plug abuts against the side surface of the C-shaped frame. The sealing plug moves in contact with the surface of the rotating shaft. The rubber gasket abuts against the side surface of the C-shaped frame to increase the airtightness between the sealing plug and the C-shaped frame. The surface of the rubber gasket is provided with air holes that connect the air guide hole and the air inlet hole.

[0015] The beneficial effects of this invention are as follows: 1. Because an air curtain device is installed coaxially with the laser generator, the air curtain device uses the same gas as the laser generator's combustion aid during the laser generator's cutting process. Without affecting the laser generator's cutting efficiency, it can form a double-layer air curtain at the cutting point to shield the debris and sparks generated during cutting. At the same time, the converging design of the inner air curtain can improve the efficiency of slag removal during laser generator processing, and minimize the threat to the personal safety of surrounding workers caused by the extremely high temperature of molten debris and sparks being splashed outwards. This would also cause burn damage to the equipment body and surrounding precision components, leading to various safety production accidents.

[0016] 2. In addition, because an auxiliary air supply device is installed between the air curtain device and the air supply pipeline, the stability of the airflow and pressure inside the air curtain device can be increased during pressure fluctuations in the air supply pipeline. This ensures the protective effect of the air curtain device and minimizes the problem of reduced protective performance caused by air pressure fluctuations in the air supply pipeline.

[0017] 3. Because the air curtain device is equipped with a protective device to protect its air outlet and laser generator outlet, when the air curtain device and laser generator are not in operation, the protective device can be adjusted to a closed state, thereby protecting the air curtain device and laser generator and minimizing their exposure to the external environment, preventing dust and other impurities from entering the air outlet and outlet. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the installation structure of the laser generator and air curtain device of the present invention; Figure 3 This is a schematic diagram of the protective device of the present invention in its deployed state; Figure 4This is a schematic diagram of the connection structure between the outer ring body and the laser generator of the present invention; Figure 5 This is a schematic diagram of the air curtain device of the present invention; Figure 6 This is the present invention. Figure 5 The front view; Figure 7 This is an exploded structural diagram of the air curtain device of the present invention; Figure 8 This is a partial cross-sectional structural diagram of the gas supply auxiliary device of the present invention; Figure 9 This is a schematic diagram of the structure of the connecting component of the present invention; Figure 10 This is a partial cross-sectional structural diagram of the protective device of the present invention; Figure 11 This is the present invention. Figure 10 Enlarged view of the structure at point A in the middle; Figure 12 This is the present invention. Figure 10 A schematic diagram of the structure in its semi-expanded state; Figure 13 This is an exploded structural diagram of the sealing component of the present invention.

[0019] In the diagram: 1. Frame; 2. Three-axis gantry; 3. Laser generator; 4. Air curtain device; 41. Outer ring; 42. Fixing bolt; 43. Pneumatic connector; 44. Inner ring; 45. Retaining ring one; 46. Retaining ring two; 47. Sealing sleeve one; 48. Sealing sleeve two; 49. Pressure stabilizing chamber; 410. Connecting hole one; 411. Inner air chamber; 412. Connecting hole two; 413. Outer air chamber; 5. Gas supply auxiliary device; 51. Assembly frame; 52. Gas cylinder; 53. Connecting assembly; 531. T-connector 532. Fixing ring; 533. Spring; 534. Sealing plug; 535. Pressure sleeve; 536. Rubber ring; 54. Pressure reducing valve; 55. Connecting pipe; 6. Protective device; 61. Assembly frame; 62. Limiting component; 621. Rotating shaft; 622. Stop bar; 623. Permanent magnet one; 63. Cover; 64. Positioning component; 641. C-shaped frame; 642. Air vent; 643. Permanent magnet two; 65. Sealing component; 651. Sealing plug; 652. Air inlet; 653. Rubber gasket. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] Example: Please refer to Figures 1-13The system includes a frame 1, on which a movable three-axis gantry 2 is mounted. A laser generator 3 is detachably mounted on the Z-axis of the three-axis gantry 2. An air supply assembly is provided inside the frame 1 to supply air to the laser generator 3 during processing, so that the laser generator 3 can move in the X, Y, and Z axes within the frame 1. A detachable air curtain device 4 is provided on the laser generator 3.

[0022] Please see Figures 3-7 The air curtain device 4 includes an outer ring 41 mounted on the surface of the laser generator 3. An inner ring 44 is fixedly connected to the inner wall of the outer ring 41 by bolts. A pressure stabilizing cavity 49 and an inner air cavity 411 are formed between the outer ring 41 and the inner ring 44. The angle between the air outlet of the inner air cavity 411 and the laser beam generated by the laser generator 3 is 15°-30°. A connecting hole 410 is provided on the outer ring 41 to connect the inner air cavity 411 and the pressure stabilizing cavity 49, ensuring that the gas in the pressure stabilizing cavity 49 can flow into the inner air cavity 411. An outer air cavity 413 is formed between the outer ring 41 and the inner ring 44. The angle between the air outlet of the outer air cavity 413 and the laser beam of the laser generator 3 is 120°-125°. A connecting hole 412 is provided on the inner ring 44 to connect the outer air cavity 413 and the pressure stabilizing cavity 49, for conveying gas from the pressure stabilizing cavity 49 to the outer air cavity 413.

[0023] Please see Figures 4-6 A first baffle ring 45 is fixedly connected to the inner wall of the outer ring body 41. The first baffle ring 45 is located below the outlet end of the first connection hole 410 and is located inside the inner air cavity 411. Since the outer edge of the first baffle ring 45 is located inside the inner ring body 44, the first baffle ring 45 can block the gas sent out from the first connection hole 410, preventing the gas from being directly discharged through the outlet of the inner air cavity 411, thus preventing the gas from forming an effective blocking air curtain. A second baffle ring 46 is fixedly connected to the inner wall of the outer ring body 41. The second baffle ring 46 is located below the outlet end of the second connection hole 412 and is located inside the outer air cavity 413. Since the inner edge of the second baffle ring 46 is located inside the inner ring body 44, the second baffle ring 46 can block the gas sent out from the second connection hole 412, ensuring that the gas sent out from the second connection hole 412 can fill the outer air cavity 413, so that the outer air cavity 413 can form an effective air curtain when sending out gas.

[0024] Please see Figures 4-6The outer ring body 41 has a threaded hole on its surface, and a pneumatic connector 43 is connected to the threaded hole with a sealed thread. The pneumatic connector 43 is connected to the pressure stabilizing chamber 49 to ensure that external gas can be delivered to the pressure stabilizing chamber 49. The outer ring body 41 has a through hole on its surface, and a fixing bolt 42 is inserted into the through hole, penetrating the outer ring body 41. The laser generator 3 has a threaded groove on its surface, and the fixing bolt 42 is threadedly connected to the inner wall of the threaded groove to ensure the firmness and stability of the outer ring body 41 in the installed state. At the same time, it can facilitate the operator to disassemble the outer ring body 41 during subsequent maintenance.

[0025] Please see Figures 4-6 A sealing sleeve 47 and a sealing sleeve 48 are detachably installed between the inner ring body 44 and the outer ring body 41 to seal the contact surface between the outer ring body 41 and the inner ring body 44, ensuring the airtightness of the pressure stabilizing chamber 49, the outer air chamber 413 and the inner air chamber 411. A round hole is provided on the sealing sleeve 47 so that the bolts for fixing the inner ring body 44 can pass through for installation.

[0026] Please see Figure 2 , Figure 3 and Figure 8 The laser generator 3 is equipped with a gas supply auxiliary device 5, which includes a gas storage cylinder 52 located on one side of the laser generator 3. A connecting component 53 is installed on the interface of the gas storage cylinder 52, and a pressure reducing valve 54 is installed on the interface of the connecting component 53. A connecting pipe 55 is fixedly connected between the pressure reducing valve 54 and the pneumatic connector 43 for supplying gas to the pressure stabilizing chamber 49.

[0027] Please see Figure 2 and Figure 3 The gas supply auxiliary device 5 also includes an assembly frame 51 fixed to the surface of the laser generator 3 by screws, and an assembly ring is provided on the outer wall of the gas storage cylinder 52. The assembly ring is fixedly connected to the upper surface of the assembly frame 51 by screws.

[0028] Please see Figure 8 and Figure 9The connecting component 53 includes a three-way connector 531 that is sealed and fixed to the interface of the gas cylinder 52. When gas enters through the three-way connector 531, the side interface of the three-way connector 531 will simultaneously deliver gas into the gas cylinder 52, realizing the gas filling operation of the gas cylinder 52. The three-way connector 531 is threadedly sealed to the interface of the pressure reducing valve 54. The three-way connector 531 can connect the gas cylinder 52 and the pressure reducing valve 54 at the same time, so that the gas stored in the gas cylinder 52 can flow to the pressure reducing valve 54. A fixing ring 532 is fixedly connected to the inner wall of the three-way connector 531, and a sealing plug 534 is slidably connected to the inner wall of the three-way connector 531. The arc surface of the sealing plug 534 has a guide groove for gas flow. A spring 533 is fixedly connected between the sealing plug 534 and the sealing ring 532. Under the restriction of the fixing ring 532, the spring 533 can apply a pre-tightening force to the sealing plug 534, so that when the air inlet pressure decreases, the sealing plug 534 can block the air inlet of the three-way connector 531 to prevent the gas in the gas storage bottle 52 from flowing back. The inner wall of the three-way connector 531 is threadedly connected to a pressure sleeve 535. The pressure sleeve 535 is in movable contact with the inclined surface of the sealing plug 534. The inclined surface of the sealing plug 534 has a groove. The inner wall of the groove is fixedly connected to a rubber ring 536. The rubber ring 536 is in movable contact with the inclined surface of the pressure sleeve 535, which can increase the sealing performance between the sealing plug 534 and the pressure sleeve 535 in the blocking state.

[0029] Please see Figure 2 , Figure 3 and Figure 10 The outer ring body 41 is provided with a protective device 6. The protective device 6 includes an assembly frame 61. The assembly frame 61 is fixed to the surface of the outer ring body 41 by an interference fit. A limit component 62 is installed on the inner wall of the assembly frame 61. A cover 63 is rotatably connected to the inner wall of the assembly frame 61. A positioning component 64 that matches the limit component 62 is provided on the inner wall of the assembly frame 61. A sealing component 65 that constrains the limit component 62 is also provided on the inner wall of the assembly frame 61.

[0030] Please see Figure 10 , Figure 12 and Figure 13The limiting component 62 includes a rotating shaft 621 detachably mounted between the assembly frame 61 and the cover 63. The rotating shaft 621 is rotatably connected to the inner wall of the assembly frame 61 and fixedly connected to the cover 63 by bolts. There are two rotating shafts 621, which are symmetrically arranged about the central axis of the cover 63. A stop strip 622 is integrally formed on the surface of the rotating shaft 621. A square hole is formed on the surface of the stop strip 622, and a permanent magnet 623 is fixedly connected to the inner wall of the square hole. The positioning component 64 includes a C-shaped frame 641 fixed to the inner wall of the assembly frame 61. The C-shaped frame 641 has an air guide hole 642 and a square groove on its upper surface. A permanent magnet 643 matching the permanent magnet 623 is fixedly connected in the square groove. When the permanent magnet 623 and the permanent magnet 643 are magnetically attracted, they can be used with the rotating shaft 621 to restrict the position of the cover 63. The sealing assembly 65 includes a sealing plug 651 that is threadedly sealed in the assembly frame 61. The surface of the sealing plug 651 has an air inlet 652 that is adapted to the air guide hole 642 for delivering air into the cavity of the air guide hole 642. The side surface of the sealing plug 651 has a fixing groove, and a rubber gasket 653 is fixedly connected in the fixing groove.

[0031] Please see Figure 2 , Figure 10 , Figure 11 , Figure 12 and Figure 13 The cover 63 moves against the surface of the outer ring 41. At this time, the cover 63 is in a blocking state, which can protect the outer ring 41, inner ring 44 and the outlet of the laser generator 3 when not in operation. The baffle 622 is rotatably sealed to the inner wall of the assembly frame 61. The air guide hole 642 is connected to the cavity inside the assembly frame 61, so that the gas supplied by the gas supply component connected to the air inlet 652 can enter the cavity formed by the assembly frame 61 and the sealing plug 651, thereby pushing the baffle 622 located in the cavity to move. The sealing plug 651 abuts against the side surface of the C-shaped frame 641 and moves against the surface of the rotating shaft 621. The rubber gasket 653 abuts against the side surface of the C-shaped frame 641 to increase the airtightness between the sealing plug 651 and the C-shaped frame 641. The surface of the rubber gasket 653 is provided with air holes that connect the air guide hole 642 and the air inlet 652.

[0032] It should be noted that when using this laser cutting machine for safe processing, the material to be processed is placed on the machine tool. After the material is placed, the operator leaves the processing area to operate the equipment. The three-axis gantry 2 moves the laser generator 3 under the set control program. At the same time, the laser generator 3 is supplied with air through the air supply component to increase the cutting efficiency of the laser generator 3, thereby realizing the cutting processing of the material. When the laser generator 3 is working, the high-pressure gas generated by the gas supply assembly flows through the pipe to the three-way connector 531. The high-pressure gas flows into the three-way connector 531 and pushes the sealing plug 534. Under the action of the high-pressure gas, the sealing plug 534 moves downward and opens, pushing the spring 533. At this time, the high-pressure gas flows through the three-way connector 531 to the pressure reducing valve 54. During the process of flowing to the pressure reducing valve 54, some gas is filled into the gas storage cylinder 52 through the three-way connector 531. The pressure reducing valve 54 then stabilizes the high-pressure gas. Gas is fed into the connecting pipe 55, which, in conjunction with the pneumatic connector 43, sends high-pressure gas into the pressure stabilizing chamber 49. The pressure stabilizing chamber 49, in conjunction with the connecting hole 1 410 and the connecting hole 2 412, sends gas into the inner air chamber 411 and the outer air chamber 413 respectively. The inner air chamber 411 ejects gas in a converging manner to form an inner air curtain, while the outer air chamber 413 ejects gas in an expanding manner to form an outer air curtain. In the subsequent processing, the formed inner and outer air curtains can shield the debris and sparks generated in the processing area. Before the laser generator 3 operates, the built-in gas supply assembly of the frame supplies gas to the left air inlet 652 through a pipe. The left air inlet 652, together with the air guide 642, delivers high-pressure gas into the cavity of the assembly frame 61. At this time, the high-pressure gas pushes the baffle 622, which moves and pulls the first permanent magnet 623 away from the second permanent magnet 643 on the left. Simultaneously, the baffle 622, under the action of the high-pressure gas, pushes the rotating shaft 621, causing the rotating shaft 621 to rotate and drive the cover 63 to rotate. At this time, the cover 63 unfolds during the rotation. When the baffle 622 moves into position, the first permanent magnet 623 and the second permanent magnet 643 on the right are magnetically attracted, which, together with the rotating shaft 621, restricts the fully unfolded cover 63. When the cover 63 is fully unfolded, the cover 63 separates from the laser generator 3 and the air curtain. Below device 4, thus avoiding interference with laser generator 3 and air curtain device 4; when the cover 63 needs to be closed, high-pressure gas enters the assembly frame 61 chamber through the right air inlet 652 and air guide 642. The high-pressure gas pushes the baffle 622 again, causing the baffle 622 to drive the rotating shaft 621 to rotate the cover 63, so that the cover 63 rotates and resets. When the cover 63 is fully reset and covers the surface of the outer ring body 41 again, the permanent magnet 623 re-attracts to the left permanent magnet 643 to restrict the cover 63 to the closed state; compared with the direct drive of the motor, the pneumatic drive structure of the protective device 6 can avoid the problem of mutual electromagnetic interference between the laser generator and the motor during operation, which would cause the laser generator and the motor to be unable to work stably.

[0033] Because an air curtain device 4 is installed coaxially with the laser generator 3, the air curtain device 4 uses the same gas as the laser generator 3 for combustion during the cutting process. While not affecting the cutting efficiency of the laser generator 3, it can form a double-layer air curtain at the cutting point to shield the debris and sparks generated during cutting. At the same time, the converging design of the inner air curtain can improve the slag removal efficiency of the laser generator 3 during processing, and minimize the threat to the personal safety of the surrounding workers caused by the extremely high temperature of the molten debris and sparks being splashed outwards. It can also cause the equipment body and surrounding precision components to be burned and damaged, which may lead to various safety production accidents.

[0034] Among them, the frame 1, the air supply components built into the frame 1, the three-axis gantry 2, the laser generator 3 and the pressure reducing valve 54 are existing technologies, and their control and working principles will not be elaborated here.

[0035] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A laser cutting machine for processing safes, comprising a frame (1), characterized in that: A three-axis gantry (2) is installed on the frame (1), and a laser generator (3) is installed on the three-axis gantry (2). An air supply assembly is provided inside the frame (1). An air curtain device (4) is provided on the surface of the laser generator (3). The air curtain device (4) includes an outer ring (41) installed on the surface of the laser generator (3). An inner ring (44) is fixedly connected to the inner wall of the outer ring (41). A pressure stabilizing cavity (49) and an inner air cavity (411) are formed between the outer ring (41) and the inner ring (44). A first connecting hole (410) is opened on the outer ring (41) to connect the inner air cavity (411) and the pressure stabilizing cavity (49). An outer air cavity (413) is formed between the outer ring (41) and the inner ring (44). A second connecting hole (412) is opened on the inner ring (44) to connect the outer air cavity (413) and the pressure stabilizing cavity (49). The outer ring (41) is provided with a protective device (6), which includes an assembly frame (61). The assembly frame (61) is fixedly connected to the surface of the outer ring (41). A limiting component (62) is installed on the inner wall of the assembly frame (61). A cover (63) is rotatably connected to the inner wall of the assembly frame (61). A positioning component (64) that cooperates with the limiting component (62) is provided on the inner wall of the assembly frame (61). A sealing component (65) that constrains the limiting component (62) is also provided on the inner wall of the assembly frame (61). The limiting component (62) includes a rotating shaft (621) installed between the assembly frame (61) and the cover (63). The rotating shaft (621) is rotatably connected to the inner wall of the assembly frame (61). The rotating shaft (621) is fixedly connected to the cover (63) by bolts. There are two rotating shafts (621). The two rotating shafts (621) are symmetrically arranged about the central axis of the cover (63). A stop strip (622) is fixedly connected to the surface of the rotating shaft (621). A square hole is opened on the surface of the stop strip (622). A permanent magnet (623) is fixedly connected to the inner wall of the square hole. The positioning component (64) The assembly includes a C-shaped frame (641) fixed to the inner wall of the assembly frame (61), the C-shaped frame (641) having an air guide hole (642) and a square groove on the upper surface of the C-shaped frame (641), a permanent magnet (643) matching the first permanent magnet (623) being fixedly connected in the square groove, and a sealing assembly (65) including a sealing plug (651) detachably installed in the assembly frame (61), the sealing plug (651) having an air inlet hole (652) adapted to the air guide hole (642) on its surface, and a fixing groove on the side surface of the sealing plug (651), a rubber gasket (653) being fixedly connected in the fixing groove. The cover (63) is in movable contact with the surface of the outer ring (41), the baffle (622) is rotatably connected to the inner wall of the assembly frame (61), the air guide hole (642) is connected to the cavity inside the assembly frame (61), the sealing plug (651) is in contact with the side surface of the C-shaped frame (641), the sealing plug (651) is in movable contact with the surface of the rotating shaft (621), the rubber gasket (653) is in contact with the side surface of the C-shaped frame (641), and the surface of the rubber gasket (653) is provided with an air hole that connects the air guide hole (642) and the air inlet hole (652).

2. The laser cutting machine for processing of a safe according to claim 1, characterized in that: A retaining ring one (45) is fixedly connected to the inner wall of the outer ring body (41). The retaining ring one (45) is located below the air outlet end of the connecting hole one (410). The retaining ring one (45) is located in the inner air cavity (411). The outer edge of the retaining ring one (45) is located in the inner ring body (44). A retaining ring two (46) is fixedly connected to the inner wall of the outer ring body (41). The retaining ring two (46) is located below the air outlet end of the connecting hole two (412). The retaining ring two (46) is located in the outer air cavity (413). The inner edge of the retaining ring two (46) is located in the inner ring body (44).

3. The laser cutting machine for processing safes according to claim 1, characterized in that: The outer ring body (41) has a threaded hole on its surface, and a pneumatic connector (43) is threaded into the threaded hole. The pneumatic connector (43) is connected to the pressure stabilizing chamber (49). The outer ring body (41) has a through hole on its surface, and a fixing bolt (42) that penetrates the outer ring body (41) is inserted into the through hole. The laser generator (3) has a threaded groove on its surface, and the fixing bolt (42) is threaded into the inner wall of the threaded groove.

4. A laser cutting machine for processing safes according to claim 2, characterized in that: A sealing sleeve one (47) and a sealing sleeve two (48) are detachably installed between the inner ring body (44) and the outer ring body (41), and a round hole is provided on the sealing sleeve one (47).

5. A laser cutting machine for processing safes according to claim 1, characterized in that: The laser generator (3) is also provided with a gas supply auxiliary device (5). The gas supply auxiliary device (5) includes a gas storage cylinder (52) located on one side of the laser generator (3). A connecting component (53) is installed on the interface of the gas storage cylinder (52). A pressure reducing valve (54) is installed on the interface of the connecting component (53). A connecting pipe (55) is fixedly connected between the pressure reducing valve (54) and the pneumatic connector (43).

6. A laser cutting machine for processing safes according to claim 5, characterized in that: The gas supply auxiliary device (5) also includes an assembly frame (51) fixed on the surface of the laser generator (3), and an assembly ring is provided on the outer wall of the gas storage cylinder (52), which is fixedly connected to the upper surface of the assembly frame (51).

7. A laser cutting machine for processing safes according to claim 5, characterized in that: The connecting assembly (53) includes a three-way connector (531) fixed to the interface of the gas cylinder (52). A fixing ring (532) is fixedly connected to the inner wall of the three-way connector (531). A sealing plug (534) is slidably connected to the inner wall of the three-way connector (531). A spring (533) is fixedly connected between the fixing ring (532) and the sealing plug (534). A pressure sleeve (535) is threadedly connected to the inner wall of the three-way connector (531). The pressure sleeve (535) is in movable contact with the inclined surface of the sealing plug (534). The inclined surface of the sealing plug (534) has a groove. A rubber ring (536) is fixedly connected to the inner wall of the groove. The rubber ring (536) is in movable contact with the inclined surface of the pressure sleeve (535).

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