Laser cutting assembly line and laser cutting method under inert pressure environment

Abstract

The invention provides a laser cutting assembly line and a laser cutting method in an inert pressure environment, and relates to the field of laser cutting. The assembly line comprises a first conveying belt, a first cabin door, a second cabin door, a third cabin door, a fourth cabin door, an inert gas control device, a ventilation device, a laser cutting device, a grinding device and a fifth conveying belt; wherein the inert gas control device is used for providing an inert pressure environment meeting a preset oxygen content interval and a preset air pressure interval; the first conveying belt is used for conveying a to-be-machined workpiece to the air interchanger; the ventilation device is used for conveying the to-be-machined workpiece to the laser cutting device; the laser cutting device is used for carrying out laser cutting on the to-be-machined workpiece until a to-be-polished area with preset machining allowance is reserved on the surface of the to-be-machined workpiece, and the to-be-polished workpiece is obtained; the grinding device is used for grinding the to-be-ground workpiece until the to-be-ground area is removed, and a machined workpiece is obtained; and the fifth conveying belt is used for conveying the processed workpiece to a target position.

Description

Technical Field

[0001] The present application belongs to the field of laser cutting technology, and specifically, relates to a laser cutting line and a laser cutting method in an inert pressure environment. Background Art

[0002] In modern manufacturing, laser cutting technology is widely used in the processing of metals, plastics, ceramics and other materials due to its high precision, high efficiency and flexibility. Although traditional laser cutting technology performs well in many applications, it still has problems such as low automation, long production cycle, poor stability, high failure rate, limited cutting accuracy and high energy consumption. These drawbacks make traditional laser cutting systems insufficient when facing the high-intensity and complex production needs of modern manufacturing.

[0003] In this context, the introduction of the laser cutting production line system is particularly necessary. The system significantly improves production efficiency and stability by integrating advanced automation technology and intelligent control systems. The production line system can realize automatic material transportation, intelligent positioning and real-time monitoring, reduce dependence on manual operation, and thus reduce errors and downtime. Through these technological innovations, the laser cutting production line system not only meets the needs of high-intensity production, but also effectively improves the reliability of the production process and product quality.

[0004] However, since laser cutting is a thermal processing method, local high temperature will cause the material in the cutting area to react with the air to oxidize, reducing the performance of the cutting area; in addition, the laser has a divergence problem in the air, which affects the focusing and reduces the cutting accuracy. Summary of the invention

[0005] In view of at least one problem existing in the prior art, the present application provides a laser cutting line and a laser cutting method in an inert pressure environment, which can improve the accuracy of laser cutting.

[0006] According to a first aspect of the present application, a laser cutting assembly line in an inert pressure environment is provided, the assembly line comprising: a first conveyor belt, a first hatch, a second hatch, a third hatch, a fourth hatch, an inert gas control device, a ventilation device, a laser cutting device, a grinding device and a fifth conveyor belt, wherein:

[0007] The inert gas control device is connected to the ventilation device, the laser cutting device and the polishing device, and is used to provide an inert pressure environment that satisfies a preset oxygen content range and a preset air pressure range for the ventilation device, the laser cutting device and the polishing device;

[0008] The first conveyor belt is arranged on a side of the fourth hatch away from the ventilation device, and is used to transfer the workpiece to be processed to the ventilation device when the fourth hatch is in an open state;

[0009] The ventilation device is disposed between the third hatch and the fourth hatch, and is used to transfer the workpiece to be processed to the laser cutting device when the fourth hatch is in a closed state and the third hatch is in an open state;

[0010] The laser cutting device is disposed between the second hatch and the third hatch, and is used to perform laser cutting on the workpiece to be processed when the third hatch is in a closed state, until a to-be-processed area with a preset processing allowance is reserved on the surface of the workpiece to be processed to obtain the workpiece to be processed, and when the second hatch is in an open state, the workpiece to be processed is transferred to the grinding device;

[0011] The grinding device is disposed between the first hatch and the second hatch, and is used to grind the workpiece to be grinded until the area to be grinded is removed to obtain a processed workpiece when the second hatch is in a closed state, and to transfer the processed workpiece to the fifth conveyor belt when the first hatch is in an open state;

[0012] The fifth conveyor belt is disposed on a side of the first cabin door away from the grinding device, and is used for transporting the processed workpiece to a target position.

[0013] In some optional aspects of this embodiment, the inert gas control device includes an inert gas cylinder, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve and a first vacuum pump, wherein:

[0014] The first end of the first solenoid valve is connected to the inert gas cylinder, and the second end of the first solenoid valve is connected to the first end of the second solenoid valve, the first end of the third solenoid valve, and the first end of the fourth solenoid valve;

[0015] The second end of the second solenoid valve is connected to the first end of the fifth solenoid valve, and the third end of the second solenoid valve is connected to the polishing device;

[0016] The second end of the third solenoid valve is connected to the first end of the fifth solenoid valve, and the third end of the third solenoid valve is connected to the laser cutting device;

[0017] The second end of the fourth solenoid valve is connected to the first end of the fifth solenoid valve, and the third end of the fourth solenoid valve is connected to the ventilation device;

[0018] The second end of the fifth solenoid valve is connected to the first vacuum pump;

[0019] The first vacuum pump is used to adjust the oxygen content of the ventilation device, the laser cutting device and the grinding device when the first solenoid valve is in a closed state, the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve are in an open state, and the first door, the second door, the third door and the fourth door are in a closed state, until the oxygen content of the ventilation device, the laser cutting device and the grinding device meets a preset oxygen content range;

[0020] The inert gas cylinder is used to adjust the air pressure of the ventilation device, the laser cutting device and the grinding device when the fifth solenoid valve is in a closed state, the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve are in an open state, and the first cabin door, the second cabin door, the third cabin door and the fourth cabin door are in a closed state, until the air pressure of the ventilation device, the laser cutting device and the grinding device meets the preset air pressure range.

[0021] In some optional aspects of this embodiment, the ventilation device includes a ventilation chamber, a second conveyor belt, a first pressure gauge, and a first oxygen content sensor, wherein:

[0022] The second conveyor belt is used to receive the workpiece to be processed when the fourth hatch is in an open state, and to transmit the workpiece to be processed to the laser cutting device when the third hatch is in an open state;

[0023] The first pressure gauge is used to monitor the air pressure in the ventilation chamber;

[0024] The first oxygen content sensor is used to monitor the oxygen content in the ventilation chamber.

[0025] In some optional aspects of this embodiment, the laser cutting device includes a third conveyor belt, a laser cutting chamber, a cutting platform, a waste box, a lifting device, a first servo motor, a laser cutting head, a sixth solenoid valve, a second vacuum pump, a waste gas barrel, a second pressure gauge, and a second oxygen content sensor, wherein:

[0026] The third conveyor belt is used to receive the workpiece to be processed when the third hatch is in an open state, and to transfer the workpiece to be polished to the polishing device when the second hatch is in an open state;

[0027] The first servo motor is used to control the laser cutting head to perform laser cutting on the workpiece to be processed placed at the first end of the cutting platform based on a preset laser power, a preset cutting speed, and a preset spot diameter;

[0028] The first end of the lifting device is connected to the second end of the cutting platform, and is used to control the distance between the cutting platform and the third conveyor belt;

[0029] The waste box is connected to the second end of the lifting device and is used to receive waste generated during laser cutting through the lifting device;

[0030] The first end of the sixth solenoid valve is connected to the third end of the cutting platform, the second end of the sixth solenoid valve is connected to the first end of the second vacuum pump, and the second end of the second vacuum pump is connected to the exhaust gas barrel:

[0031] The second vacuum pump is used to extract the exhaust gas from the laser cutting chamber into the exhaust gas barrel when the sixth solenoid valve is in an open state;

[0032] The second pressure gauge is used to monitor the air pressure in the laser cutting chamber;

[0033] The second oxygen content sensor is used to monitor the oxygen content in the laser cutting chamber.

[0034] In some optional aspects of this embodiment, the first end of the cutting platform includes an electric ball bearing for adjusting the position of the workpiece to be processed at the first end of the cutting platform;

[0035] The second end of the cutting platform is an inclined structure provided with a notch; the interior of the lifting device is a hollow pipe.

[0036] In some optional aspects of this embodiment, the grinding device includes a fourth conveyor belt, a grinding chamber, a rotating grinding head, a second servo motor, a third pressure gauge, and a third oxygen content sensor, wherein:

[0037] The fourth conveyor belt is used to receive the workpiece to be polished when the second hatch is in an open state, and to transfer the processed workpiece to the fifth conveyor belt when the first hatch is in an open state;

[0038] The second servo motor is used to control the rotary grinding head to grind the workpiece to be grinded based on a preset rotation speed;

[0039] The third pressure gauge is used to monitor the air pressure in the polishing chamber;

[0040] The third oxygen content sensor is used to monitor the oxygen content in the polishing chamber.

[0041] According to a second aspect of the present application, there is also provided a laser cutting method for a laser cutting line in a money-based inert pressure environment, the method comprising:

[0042] Controlling the first hatch, the second hatch and the third hatch to be in a closed state and the fourth hatch to be in an open state, and transmitting the workpiece to be processed to the ventilation device based on the first conveyor belt;

[0043] Controlling the fourth hatch to be in a closed state, and providing an inert pressure environment satisfying a preset oxygen content range and a preset air pressure range for the ventilation device, the laser cutting device, and the grinding device;

[0044] Controlling the third hatch to be in an open state, and transmitting the workpiece to be processed to the laser cutting device;

[0045] Controlling the third hatch to be in a closed state, and performing laser cutting on the workpiece to be processed, until a grinding area with a preset machining allowance is retained on the surface of the workpiece to be processed, thereby obtaining the workpiece to be grinded;

[0046] Controlling the second hatch to be in an open state, and transmitting the workpiece to be polished to the polishing device;

[0047] Controlling the second hatch to be in a closed state, and grinding the workpiece to be ground until the area to be ground is removed to obtain a processed workpiece;

[0048] When the first hatch is controlled to be in an open state, the processed workpiece is transferred to the fifth conveyor belt, and the processed workpiece is transferred to a target position based on the fifth conveyor belt.

[0049] In some optional embodiments of this embodiment, the inert gas control device includes an inert gas cylinder, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve and a first vacuum pump, and the inert pressure environment that satisfies a preset oxygen content range and a preset air pressure range is provided for the ventilation device, the laser cutting device and the polishing device, including:

[0050] Control the first solenoid valve to be in a closed state and the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve to be in an open state, adjust the oxygen content of the ventilation device, the laser cutting device and the grinding device until the oxygen content of the ventilation device, the laser cutting device and the grinding device meets the preset oxygen content range, and control the fifth solenoid valve to be in a closed state;

[0051] Control the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve to be in the open state, adjust the air pressure of the ventilation device, the laser cutting device and the grinding device until the air pressure of the ventilation device, the laser cutting device and the grinding device meets the preset air pressure range, and control the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve to be in the closed state.

[0052] In some optional aspects of this embodiment, when the workpiece to be processed is laser cut, the laser cutting method further includes:

[0053] Controlling the fourth hatch to be in an open state, and transmitting the next workpiece to be processed to the ventilation device based on the first conveyor belt;

[0054] Controlling the fourth hatch to be in a closed state, and controlling the fourth solenoid valve and the fifth solenoid valve to be in an open state, adjusting the oxygen content of the ventilation device until the oxygen content of the ventilation device meets a preset oxygen content range, and controlling the fifth solenoid valve to be in a closed state;

[0055] The first solenoid valve is controlled to be in an open state, the air pressure of the ventilation device is adjusted until the air pressure of the ventilation device meets a preset air pressure range, and the first solenoid valve and the fourth solenoid valve are controlled to be in a closed state.

[0056] In some optional aspects of this embodiment, after transferring the processed workpiece to the fifth conveyor belt, the laser cutting method further includes:

[0057] Controlling the first hatch to be in a closed state, and controlling the second solenoid valve and the fifth solenoid valve to be in an open state, adjusting the oxygen content of the grinding device until the oxygen content of the grinding device meets the preset oxygen content range, and controlling the fifth solenoid valve to be in a closed state;

[0058] The first solenoid valve and the third solenoid valve are controlled to be in an open state, the air pressure of the grinding device and the laser cutting device is adjusted until the air pressure of the grinding device and the laser cutting device meets the preset air pressure range, and the first solenoid valve and the third solenoid valve are controlled to be in a closed state.

[0059] The present application provides a laser cutting line and a laser cutting method in an inert pressure environment. The line is composed of a first conveyor belt, a first hatch, a second hatch, a third hatch, a fourth hatch, an inert gas control device, a ventilation device, a laser cutting device, a grinding device and a fifth conveyor belt, which realizes orderly processing of workpieces and improves the workpiece processing efficiency. In addition, laser cutting in an inert environment can prevent the workpiece to be processed from being oxidized at high temperatures. In a pressure environment, the laser beam can maintain a more stable focus, which helps to improve cutting accuracy and consistency. The laser cutting line and the laser cutting method of the present application can meet the high-intensity and complex production needs of the modern manufacturing industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0061] Figure 1 This is one of the structural schematic diagrams of a laser cutting line in an inert environment according to an embodiment of the present application;

[0062] Figure 2 This is a second structural schematic diagram of a laser cutting line in an inert environment according to an embodiment of the present application;

[0063] Figure 3 The third structural schematic diagram of the laser cutting line in an inert environment according to an embodiment of the present application;

[0064] Figure 4 is a schematic structural diagram of a cutting platform according to an embodiment of the present application;

[0065] Figure 5 It is a schematic flow chart of a laser cutting method of a laser cutting line in an inert environment according to an embodiment of the present application. DETAILED DESCRIPTION

[0066] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0067] In the description of the present application, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application; the terms "first", "third", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0068] According to the first aspect of the present application, Figure 1 and Figure 2As shown, a laser cutting production line under an inert pressure environment is provided, the production line comprising: a first conveyor belt 9, a first hatch 1, a second hatch 2, a third hatch 3, a fourth hatch 4, an inert gas control device 8, a ventilation device 7, a laser cutting device 6, a grinding device 5 and a fifth conveyor belt 10, wherein:

[0069] The inert gas control device is connected to the ventilation device, the laser cutting device and the polishing device, and is used to provide an inert pressure environment that satisfies a preset oxygen content range and a preset air pressure range for the ventilation device, the laser cutting device and the polishing device;

[0070] The first conveyor belt is arranged on a side of the fourth hatch away from the ventilation device, and is used to transfer the workpiece to be processed to the ventilation device when the fourth hatch is in an open state;

[0071] The ventilation device is disposed between the third hatch and the fourth hatch, and is used to transfer the workpiece to be processed to the laser cutting device when the fourth hatch is in a closed state and the third hatch is in an open state;

[0072] The laser cutting device is disposed between the second hatch and the third hatch, and is used to perform laser cutting on the workpiece to be processed when the third hatch is in a closed state, until a to-be-processed area with a preset processing allowance is reserved on the surface of the workpiece to be processed to obtain the workpiece to be processed, and when the second hatch is in an open state, the workpiece to be processed is transferred to the grinding device;

[0073] The grinding device is disposed between the first hatch and the second hatch, and is used to grind the workpiece to be grinded until the area to be grinded is removed to obtain a processed workpiece when the second hatch is in a closed state, and to transfer the processed workpiece to the fifth conveyor belt when the first hatch is in an open state;

[0074] The fifth conveyor belt is disposed on a side of the first cabin door away from the grinding device, and is used for transporting the processed workpiece to a target position.

[0075] In some optional embodiments of this embodiment, Figure 3 As shown, the inert gas control device includes an inert gas bottle 80, a first solenoid valve 81, a second solenoid valve 82, a third solenoid valve 83, a fourth solenoid valve 84, a fifth solenoid valve 85 and a first vacuum pump 86, wherein:

[0076] The first end of the first solenoid valve is connected to the inert gas cylinder, and the second end of the first solenoid valve is connected to the first end of the second solenoid valve, the first end of the third solenoid valve, and the first end of the fourth solenoid valve;

[0077] The second end of the second solenoid valve is connected to the first end of the fifth solenoid valve, and the third end of the second solenoid valve is connected to the polishing device;

[0078] The second end of the third solenoid valve is connected to the first end of the fifth solenoid valve, and the third end of the third solenoid valve is connected to the laser cutting device;

[0079] The second end of the fourth solenoid valve is connected to the first end of the fifth solenoid valve, and the third end of the fourth solenoid valve is connected to the ventilation device;

[0080] The second end of the fifth solenoid valve is connected to the first vacuum pump;

[0081] The first vacuum pump is used to adjust the oxygen content of the ventilation device, the laser cutting device and the grinding device when the first solenoid valve is in a closed state, the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve are in an open state, and the first door, the second door, the third door and the fourth door are in a closed state, until the oxygen content of the ventilation device, the laser cutting device and the grinding device meets a preset oxygen content range;

[0082] The inert gas cylinder is used to adjust the air pressure of the ventilation device, the laser cutting device and the grinding device when the fifth solenoid valve is in a closed state, the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve are in an open state, and the first cabin door, the second cabin door, the third cabin door and the fourth cabin door are in a closed state, until the air pressure of the ventilation device, the laser cutting device and the grinding device meets the preset air pressure range.

[0083] In some optional embodiments of this embodiment, Figure 3 As shown, the ventilation device includes a ventilation chamber 70, a second conveyor belt 71, a first pressure gauge 72 and a first oxygen content sensor 73, wherein:

[0084] The second conveyor belt is used to receive the workpiece to be processed when the fourth hatch is in an open state, and to transmit the workpiece to be processed to the laser cutting device when the third hatch is in an open state;

[0085] The first pressure gauge is used to monitor the air pressure in the ventilation chamber;

[0086] The first oxygen content sensor is used to monitor the oxygen content in the ventilation chamber.

[0087] In some optional embodiments of this embodiment, Figure 3As shown, the laser cutting device includes a third conveyor belt 60, a laser cutting chamber 61, a cutting platform 63, a waste box 69, a lifting device 610, a first servo motor 65, a laser cutting head 66, a sixth solenoid valve 611, a second vacuum pump 612, a waste gas barrel 613, a second pressure gauge 67 and a second oxygen content sensor 68, wherein:

[0088] The third conveyor belt is used to receive the workpiece to be processed when the third hatch is in an open state, and to transfer the workpiece to be polished to the polishing device when the second hatch is in an open state;

[0089] The first servo motor is used to control the laser cutting head to perform laser cutting on the workpiece to be processed placed at the first end of the cutting platform based on a preset laser power, a preset cutting speed, and a preset spot diameter;

[0090] The first end of the lifting device is connected to the second end of the cutting platform, and is used to control the distance between the cutting platform and the third conveyor belt;

[0091] The waste box is connected to the second end of the lifting device and is used to receive waste generated during laser cutting through the lifting device;

[0092] The first end of the sixth solenoid valve is connected to the third end of the cutting platform, the second end of the sixth solenoid valve is connected to the first end of the second vacuum pump, and the second end of the second vacuum pump is connected to the exhaust gas barrel:

[0093] The second vacuum pump is used to extract the exhaust gas from the laser cutting chamber into the exhaust gas barrel when the sixth solenoid valve is in an open state;

[0094] The second pressure gauge is used to monitor the air pressure in the laser cutting chamber;

[0095] The second oxygen content sensor is used to monitor the oxygen content in the laser cutting chamber.

[0096] In some optional embodiments of this embodiment, Figure 4 As shown, the first end of the cutting platform includes an electric ball 62 for adjusting the position of the workpiece to be processed at the first end of the cutting platform;

[0097] The second end B of the cutting platform is an inclined structure provided with a notch; the interior of the lifting device is a hollow pipe.

[0098] In this embodiment, the cutting platform contains 8 electric ball bearings to achieve precise positioning of the workpiece. The middle part of the cutting platform is a bracket structure, which is responsible for supporting the electric ball bearings and the bracket, and is also conducive to the falling of waste after cutting. The bottom of the cutting platform is an inclined structure with a notch connected to the waste box. The waste box is used to collect waste remaining from cutting. The waste gas barrel is used to collect and purify waste gas generated during the cutting process. The laser cutting head is responsible for cutting the workpiece. The main body of the rotating grinding head is made of a ceramic grinding wheel, and various types of silicon carbide sandpaper can be pasted on the surface to perform high-speed grinding on the cutting position to remove the laser cutting recast layer and the heat affected zone.

[0099] In some optional embodiments of this embodiment, Figure 3 As shown, the grinding device includes a fourth conveyor belt 56, a grinding chamber 50, a rotating grinding head 52, a second servo motor 53, a third pressure gauge 54 and a third oxygen content sensor 55, wherein:

[0100] The fourth conveyor belt is used to receive the workpiece to be polished when the second hatch is in an open state, and to transfer the processed workpiece to the fifth conveyor belt when the first hatch is in an open state;

[0101] The second servo motor is used to control the rotary grinding head to grind the workpiece to be grinded based on a preset rotation speed;

[0102] The third pressure gauge is used to monitor the air pressure in the polishing chamber;

[0103] The third oxygen content sensor is used to monitor the oxygen content in the polishing chamber.

[0104] In this embodiment, different gas cylinders are respectively filled with nitrogen (N2), argon (He) and helium (Ar) to adapt to workpieces of different materials; the vacuum pump is connected to the bottom of the cutting platform, responsible for removing the gas and smoke generated during the cutting process to keep the working environment clean; the pressure gauge and oxygen content sensor are responsible for monitoring the oxygen content and pressure changes in each studio; the grinding room, laser cutting room, ventilation room and closed cabin door provide a closed pressure environment for laser cutting.

[0105] In order to solve the problems existing in the prior art, the present application provides a set of laser cutting production line system and method under inert pressure environment to improve the quality and efficiency of laser cutting. The laser cutting production line under inert pressure environment consists of a ventilation chamber, a laser cutting chamber, a grinding chamber, a guide rail ( Figure 3The laser cutting line is composed of a laser cutting head, a rotating grinding head, a conveyor belt, a workpiece, a cutting platform, an electric ball bearing, a lifting device, a sealed door, a pressure gauge, an oxygen content sensor, a gas cylinder, a vacuum pump, a waste box, a waste barrel, a solenoid valve, and a computer. The laser cutting line can achieve high-efficiency and high-quality laser cutting under an inert pressure environment, and has the advantages of good quality, strong adaptability, low cost, low pollution, and easy automatic control.

[0106] It should be noted that the present application is mainly coordinated by computer 11 to control the opening and closing of the closed door, the opening and closing of the solenoid valve, the operation of the conveyor belt and the movement of the laser cutting head / rotating grinding head, while receiving feedback from the pressure gauge and the oxygen content sensor to ensure that the entire production process is orderly and efficient.

[0107] It should also be noted that, compared with the prior art, the present invention has the following advantages and beneficial effects:

[0108] (1) The laser cutting production line system under inert pressure environment provided by the present application creates a pressure environment full of inert gas for laser cutting, which fundamentally avoids the oxidation problem caused by air intrusion during the laser cutting process, and maximizes the cutting quality on the basis of ensuring processing efficiency. (2) The present application adds a high-speed grinding process after laser cutting to remove the recast layer and heat-affected zone caused by the local thermal effect of the laser, thereby maximizing the cutting quality of the finished product. (3) In the present application, the start and stop of the conveyor belt, the configuration of the laser cutting parameters, the grinding rotation speed, the opening and closing of the solenoid valve and the sealed hatch are all controlled by a computer, which maximizes the unified coordination of the system while ensuring product quality, so as to improve the laser cutting efficiency. (4) In the present application, the vacuum pump connected to the bottom of the cutting platform can effectively remove the smoke and gas generated during the cutting process and keep the working environment clean. (5) In the present application, the cutting platform is separated from the conveyor belt to avoid damage to the conveyor belt during the laser cutting process. (6) The high-pressure environment provided by the present application can enhance the focusing and penetration ability of the laser, and can be used to cut highly reflective materials and high melting point materials. (7) The harmful gases generated in the laser cutting room of the present application are completely isolated, thereby reducing the health hazards to the equipment and operators. (8) Three different inert gas cylinders are provided in the present application, which can adapt to most materials.

[0109] According to the second aspect of the present application, Figure 5 As shown, a laser cutting method for a laser cutting line in an inert pressure environment based on money is also provided, the method comprising:

[0110] Step S10, controlling the first hatch, the second hatch and the third hatch to be in a closed state and the fourth hatch to be in an open state, and transmitting the workpiece to be processed to the ventilation device based on the first conveyor belt;

[0111] Step S20, controlling the fourth hatch to be in a closed state, and providing an inert pressure environment satisfying a preset oxygen content range and a preset air pressure range for the ventilation device, the laser cutting device, and the grinding device;

[0112] Step S30, controlling the third hatch to be in an open state, and transmitting the workpiece to be processed to the laser cutting device;

[0113] Step S40, controlling the third hatch to be in a closed state, and performing laser cutting on the workpiece to be processed, until a grinding area with a preset machining allowance is retained on the surface of the workpiece to be processed, thereby obtaining the workpiece to be grinded;

[0114] Step S50, controlling the second hatch to be in an open state, and transmitting the workpiece to be polished to the polishing device;

[0115] Step S60, controlling the second hatch to be in a closed state, and grinding the workpiece to be ground until the area to be ground is removed to obtain a processed workpiece;

[0116] Step S70, controlling the first hatch to be in an open state, transferring the processed workpiece to the fifth conveyor belt, and transferring the processed workpiece to a target position based on the fifth conveyor belt.

[0117] In some optional embodiments of this embodiment, the inert gas control device includes an inert gas cylinder, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve and a first vacuum pump, and the inert pressure environment that satisfies a preset oxygen content range and a preset air pressure range is provided for the ventilation device, the laser cutting device and the polishing device, including:

[0118] Control the first solenoid valve to be in a closed state and the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve to be in an open state, adjust the oxygen content of the ventilation device, the laser cutting device and the grinding device until the oxygen content of the ventilation device, the laser cutting device and the grinding device meets the preset oxygen content range, and control the fifth solenoid valve to be in a closed state;

[0119] Control the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve to be in the open state, adjust the air pressure of the ventilation device, the laser cutting device and the grinding device until the air pressure of the ventilation device, the laser cutting device and the grinding device meets the preset air pressure range, and control the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve to be in the closed state.

[0120] In some optional aspects of this embodiment, when the workpiece to be processed is laser cut, the laser cutting method further includes:

[0121] Controlling the fourth hatch to be in an open state, and transmitting the next workpiece to be processed to the ventilation device based on the first conveyor belt;

[0122] Controlling the fourth hatch to be in a closed state, and controlling the fourth solenoid valve and the fifth solenoid valve to be in an open state, adjusting the oxygen content of the ventilation device until the oxygen content of the ventilation device meets a preset oxygen content range, and controlling the fifth solenoid valve to be in a closed state;

[0123] The first solenoid valve is controlled to be in an open state, the air pressure of the ventilation device is adjusted until the air pressure of the ventilation device meets a preset air pressure range, and the first solenoid valve and the fourth solenoid valve are controlled to be in a closed state.

[0124] In some optional aspects of this embodiment, after transferring the processed workpiece to the fifth conveyor belt, the laser cutting method further includes:

[0125] Controlling the first hatch to be in a closed state, and controlling the second solenoid valve and the fifth solenoid valve to be in an open state, adjusting the oxygen content of the grinding device until the oxygen content of the grinding device meets the preset oxygen content range, and controlling the fifth solenoid valve to be in a closed state;

[0126] The first solenoid valve and the third solenoid valve are controlled to be in an open state, the air pressure of the grinding device and the laser cutting device is adjusted until the air pressure of the grinding device and the laser cutting device meets the preset air pressure range, and the first solenoid valve and the third solenoid valve are controlled to be in a closed state.

[0127] In a specific example, the first hatch, the second hatch, the third hatch and the fourth hatch are represented by closed hatch a, closed hatch b, closed hatch c and closed hatch d respectively; the first conveyor belt, the second conveyor belt, the third conveyor belt, the fourth conveyor belt and the fifth conveyor belt are represented by conveyor belt e, conveyor belt d, conveyor belt c, conveyor belt b and conveyor belt a respectively; the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve and the sixth solenoid valve are represented by solenoid valve a, solenoid valve b, solenoid valve c, solenoid valve e, solenoid valve f and solenoid valve d respectively; the first vacuum pump and the second vacuum pump are represented by vacuum pump b and vacuum pump a respectively, and the specific operating steps are as follows:

[0128] Step 1: Close the airtight doors a, b, and c. The conveyor belt e transports the workpiece to be cut to the ventilation room.

[0129] Step 2: Close the sealed hatch d. Open the solenoid valves b, c, e, and f, start the vacuum pump b, and reduce the oxygen content in each working room to below 100ppm (detected by the oxygen content sensor). Then, close the solenoid valve f, select the corresponding inert gas (such as nitrogen), open the solenoid valve a, and increase the air pressure in each working room to 0.1-0.9Mpa (for example, 0.2Mpa) and reach a stable state (detected by a pressure gauge). Close the solenoid valves a, b, c, and e.

[0130] Step 3: Set the laser power to 4000-20000 W (e.g. 8000 W), the cutting speed to 800-2000 mm / min (e.g. 800 mm / min), and the spot diameter to 0.1-1 mm (e.g. 0.3 mm).

[0131] Step 4: Open the sealed door c, and the workpiece moves to the cutting platform with the conveyor belt. The electric ball moves the workpiece to the accurate cutting position, and then close the sealed door c, and the laser cutting head starts to cut the workpiece, leaving a grinding allowance of 0.1-0.3mm (for example, 0.2mm).

[0132] Step 5: After the laser cutting head starts working, open the sealed door d, and the new workpiece enters the ventilation chamber with the conveyor belt. Close the sealed door d, open the solenoid valves e and f, start the vacuum pump b, and reduce the oxygen concentration in the ventilation chamber to below 100ppm (detected by the oxygen content sensor). After that, close the solenoid valve f, open the solenoid valve a, make the air pressure in the ventilation chamber return to the set value in step 2 (for example, 0.2MPa), and close the solenoid valves a and e.

[0133] Step 6: After completing the laser cutting, open the solenoid valve d, start the vacuum pump a, remove the exhaust gas in the laser cutting room, and then close the solenoid valve d and the vacuum pump a. Control the cutting platform to lower with the lifting device, and transfer the workpiece to the conveyor belt. Open the sealed door b, and the workpiece enters the grinding room with the conveyor belt. After the workpiece moves to the appropriate position, the conveyor belt b in the grinding room stops. After that, the sealed door b is closed, and the high-speed grinding head starts to grind the cutting position of the workpiece. The adjustable rotation speed range is 0 to 2000r / min (for example, 1000r / min).

[0134] Step 7: After grinding is completed, open the sealed door a, and the workpiece leaves the grinding room with the conveyor belt. Then close the sealed door a, open the solenoid valves b and f, start the vacuum pump b, and reduce the oxygen concentration in the grinding room to below 100ppm (detected by the oxygen content sensor). Then close the solenoid valve f, open the solenoid valves a and c, and return the air pressure in the grinding room and the laser cutting room to the set value of step 2 (for example, 0.2MPa). Close the solenoid valves a, b, and c.

[0135] Step 8: Repeat steps 4 to 7.

[0136] It should be noted that the monitoring device in the laser cutting room is: oxygen content sensor; the method of controlling the oxygen content is "gas washing", that is, multiple filling and deflation to reduce the oxygen content to the preset range; specific measures: in step 2, the oxygen content in the three working rooms will be controlled simultaneously to ensure that it reaches the preset range. After that, before the second and third hatches are opened, the oxygen content in the ventilation room and the polishing room will be adjusted in advance to ensure that it is the same as that in the laser cutting room. In this way, the fluctuation of oxygen content in the laser cutting room can be minimized and direct exchange of air between the laser cutting room and the outside air can be avoided.

[0137] The laser cutting production line system and method under an inert pressure environment disclosed by the present invention are characterized in that a ventilation chamber, a laser cutting chamber and a grinding chamber are provided to provide a pure inert atmosphere environment for laser cutting and avoid the phenomenon of material oxidation; the laser cutting chamber is absolutely isolated from the outside world, fundamentally avoiding the harm of harmful gases to operators; a variety of inert gases are installed to adapt to various types of materials; an inert high-pressure environment is installed in the laser cutting production line; a modular design concept is adopted, and various parts of the production line can be flexibly configured and upgraded according to needs; the start and stop of the conveyor belts in the three working rooms are adjusted in real time according to the actual laser cutting process to ensure the orderly entry of the workpieces; a high-speed grinding process is added after laser cutting, which is conducive to removing the laser The recast layer and heat-affected zone produced by laser cutting reduce the roughness of the cutting surface and improve the performance of the cutting area; a processing allowance of 0.1 to 0.3 mm is left during laser cutting, and the allowance is subsequently removed by high-speed grinding to ensure the accuracy of the cut product; the cutting platform is separated from the conveyor belt to avoid damage to the conveyor belt caused by laser cutting; the bottom of the cutting platform is directly connected to the vacuum pump, which can effectively remove the smoke and gas generated during the cutting process; the middle part of the lifting device is a hollow pipe; the material used for the main body of the rotating grinding head is a ceramic grinding wheel, which is resistant to high temperature, has good wear resistance, and is suitable for high-speed grinding. At the same time, various types of silicon carbide sandpaper can be pasted to adapt to more materials; an intelligent gas flow and pressure control system is introduced to optimize the cutting quality and efficiency through real-time detection and automatic adjustment of gas pressure.

[0138] The present invention proposes a laser cutting production system and method under an inert pressure environment, which can avoid the oxidation problem of materials at high temperatures. In addition, the laser beam can maintain a more stable focus in a pressure environment, which helps to improve cutting accuracy and consistency. Therefore, the laser cutting assembly line production system designed by the present invention under an inert pressure environment can better meet the high-intensity and complex production needs of modern manufacturing.

[0139] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of this disclosure can be achieved, and this document is not limited here.

[0140] The above specific implementations do not constitute a limitation on the protection scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A laser cutting line in an inert pressure environment, characterized in that: include: A first conveyor belt, a first hatch, a second hatch, a third hatch, a fourth hatch, an inert gas control device, a ventilation device, a laser cutting device, a grinding device, and a fifth conveyor belt, wherein: The inert gas control device is connected to the ventilation device, the laser cutting device and the polishing device, and is used to provide an inert pressure environment that satisfies a preset oxygen content range and a preset air pressure range for the ventilation device, the laser cutting device and the polishing device; The first conveyor belt is arranged on a side of the fourth hatch away from the ventilation device, and is used to transfer the workpiece to be processed to the ventilation device when the fourth hatch is in an open state; The ventilation device is disposed between the third hatch and the fourth hatch, and is used to transfer the workpiece to be processed to the laser cutting device when the fourth hatch is in a closed state and the third hatch is in an open state; The laser cutting device is disposed between the second hatch and the third hatch, and is used to perform laser cutting on the workpiece to be processed when the third hatch is in a closed state, until a to-be-processed area with a preset processing allowance is reserved on the surface of the workpiece to be processed to obtain the workpiece to be processed, and when the second hatch is in an open state, the workpiece to be processed is transferred to the grinding device; The grinding device is disposed between the first hatch and the second hatch, and is used to grind the workpiece to be grinded until the area to be grinded is removed to obtain a processed workpiece when the second hatch is in a closed state, and to transfer the processed workpiece to the fifth conveyor belt when the first hatch is in an open state; The fifth conveyor belt is disposed on a side of the first cabin door away from the grinding device, and is used for transporting the processed workpiece to a target position.

2. The laser cutting line according to claim 1, characterized in that: The inert gas control device comprises an inert gas cylinder, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve and a first vacuum pump, wherein: The first end of the first solenoid valve is connected to the inert gas cylinder, and the second end of the first solenoid valve is connected to the first end of the second solenoid valve, the first end of the third solenoid valve, and the first end of the fourth solenoid valve; The second end of the second solenoid valve is connected to the first end of the fifth solenoid valve, and the third end of the second solenoid valve is connected to the polishing device; The second end of the third solenoid valve is connected to the first end of the fifth solenoid valve, and the third end of the third solenoid valve is connected to the laser cutting device; The second end of the fourth solenoid valve is connected to the first end of the fifth solenoid valve, and the third end of the fourth solenoid valve is connected to the ventilation device; The second end of the fifth solenoid valve is connected to the first vacuum pump; The first vacuum pump is used to adjust the oxygen content of the ventilation device, the laser cutting device and the grinding device when the first solenoid valve is in a closed state, the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve are in an open state, and the first door, the second door, the third door and the fourth door are in a closed state, until the oxygen content of the ventilation device, the laser cutting device and the grinding device meets a preset oxygen content range; The inert gas cylinder is used to adjust the air pressure of the ventilation device, the laser cutting device and the grinding device when the fifth solenoid valve is in a closed state, the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve are in an open state, and the first cabin door, the second cabin door, the third cabin door and the fourth cabin door are in a closed state, until the air pressure of the ventilation device, the laser cutting device and the grinding device meets the preset air pressure range.

3. The laser cutting line according to claim 1, characterized in that: The ventilation device comprises a ventilation chamber, a second conveyor belt, a first pressure gauge and a first oxygen content sensor, wherein: The second conveyor belt is used to receive the workpiece to be processed when the fourth hatch is in an open state, and to transmit the workpiece to be processed to the laser cutting device when the third hatch is in an open state; The first pressure gauge is used to monitor the air pressure in the ventilation chamber; The first oxygen content sensor is used to monitor the oxygen content in the ventilation chamber.

4. The laser cutting line according to claim 1, characterized in that: The laser cutting device includes a third conveyor belt, a laser cutting chamber, a cutting platform, a waste box, a lifting device, a first servo motor, a laser cutting head, a sixth solenoid valve, a second vacuum pump, a waste gas barrel, a second pressure gauge and a second oxygen content sensor, wherein: The third conveyor belt is used to receive the workpiece to be processed when the third hatch is in an open state, and to transfer the workpiece to be polished to the polishing device when the second hatch is in an open state; The first servo motor is used to control the laser cutting head to perform laser cutting on the workpiece to be processed placed at the first end of the cutting platform based on a preset laser power, a preset cutting speed, and a preset spot diameter; The first end of the lifting device is connected to the second end of the cutting platform, and is used to control the distance between the cutting platform and the third conveyor belt; The waste box is connected to the second end of the lifting device and is used to receive waste generated during laser cutting through the lifting device; The first end of the sixth solenoid valve is connected to the third end of the cutting platform, the second end of the sixth solenoid valve is connected to the first end of the second vacuum pump, and the second end of the second vacuum pump is connected to the exhaust gas barrel: The second vacuum pump is used to extract the exhaust gas from the laser cutting chamber into the exhaust gas barrel when the sixth solenoid valve is in an open state; The second pressure gauge is used to monitor the air pressure in the laser cutting chamber; The second oxygen content sensor is used to monitor the oxygen content in the laser cutting chamber.

5. The laser cutting line according to claim 4, characterized in that: The first end of the cutting platform includes an electric ball bearing for adjusting the position of the workpiece to be processed at the first end of the cutting platform; The second end of the cutting platform is an inclined structure provided with a notch; the interior of the lifting device is a hollow pipe.

6. The laser cutting line according to claim 1, characterized in that: The grinding device includes a fourth conveyor belt, a grinding chamber, a rotating grinding head, a second servo motor, a third pressure gauge and a third oxygen content sensor, wherein: The fourth conveyor belt is used to receive the workpiece to be polished when the second hatch is in an open state, and to transfer the processed workpiece to the fifth conveyor belt when the first hatch is in an open state; The second servo motor is used to control the rotary grinding head to grind the workpiece to be grinded based on a preset rotation speed; The third pressure gauge is used to monitor the air pressure in the polishing chamber; The third oxygen content sensor is used to monitor the oxygen content in the polishing chamber.

7. A laser cutting method for a laser cutting line in an inert pressure environment according to any one of claims 1 to 6, characterized in that: include: Controlling the first hatch, the second hatch and the third hatch to be in a closed state and the fourth hatch to be in an open state, and transmitting the workpiece to be processed to the ventilation device based on the first conveyor belt; Controlling the fourth hatch to be in a closed state, and providing an inert pressure environment satisfying a preset oxygen content range and a preset air pressure range for the ventilation device, the laser cutting device, and the grinding device; Controlling the third hatch to be in an open state, and transmitting the workpiece to be processed to the laser cutting device; Controlling the third hatch to be in a closed state, and performing laser cutting on the workpiece to be processed, until a grinding area with a preset machining allowance is retained on the surface of the workpiece to be processed, thereby obtaining the workpiece to be grinded; Controlling the second hatch to be in an open state, and transmitting the workpiece to be polished to the polishing device; Controlling the second hatch to be in a closed state, and grinding the workpiece to be ground until the area to be ground is removed to obtain a processed workpiece; When the first hatch is controlled to be in an open state, the processed workpiece is transferred to the fifth conveyor belt, and the processed workpiece is transferred to a target position based on the fifth conveyor belt.

8. The laser cutting method according to claim 7, characterized in that: The inert gas control device includes an inert gas cylinder, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve and a first vacuum pump, and provides an inert pressure environment that satisfies a preset oxygen content range and a preset air pressure range for the ventilation device, the laser cutting device and the polishing device, including: Control the first solenoid valve to be in a closed state and the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve to be in an open state, adjust the oxygen content of the ventilation device, the laser cutting device and the grinding device until the oxygen content of the ventilation device, the laser cutting device and the grinding device meets the preset oxygen content range, and control the fifth solenoid valve to be in a closed state; Control the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve to be in the open state, adjust the air pressure of the ventilation device, the laser cutting device and the grinding device until the air pressure of the ventilation device, the laser cutting device and the grinding device meets the preset air pressure range, and control the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve to be in the closed state.

9. The laser cutting method according to claim 8, characterized in that: When the workpiece to be processed is laser cut, the laser cutting method further comprises: Controlling the fourth hatch to be in an open state, and transmitting the next workpiece to be processed to the ventilation device based on the first conveyor belt; Controlling the fourth hatch to be in a closed state, and controlling the fourth solenoid valve and the fifth solenoid valve to be in an open state, adjusting the oxygen content of the ventilation device until the oxygen content of the ventilation device meets a preset oxygen content range, and controlling the fifth solenoid valve to be in a closed state; The first solenoid valve is controlled to be in an open state, the air pressure of the ventilation device is adjusted until the air pressure of the ventilation device meets a preset air pressure range, and the first solenoid valve and the fourth solenoid valve are controlled to be in a closed state.

10. The laser cutting method according to claim 9, characterized in that: After transferring the processed workpiece to the fifth conveyor belt, the laser cutting method further comprises: Controlling the first hatch to be in a closed state, and controlling the second solenoid valve and the fifth solenoid valve to be in an open state, adjusting the oxygen content of the grinding device until the oxygen content of the grinding device meets the preset oxygen content range, and controlling the fifth solenoid valve to be in a closed state; The first solenoid valve and the third solenoid valve are controlled to be in an open state, the air pressure of the grinding device and the laser cutting device is adjusted until the air pressure of the grinding device and the laser cutting device meets the preset air pressure range, and the first solenoid valve and the third solenoid valve are controlled to be in a closed state.

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