A laser cutting machine and cutting process for sheet metal plate cutting

Abstract

The application relates to the technical field of laser cutting and discloses a laser cutting machine for sheet metal cutting and a cutting process, wherein the laser cutting machine for sheet metal cutting comprises a rack and a laser cutting head, the laser cutting head is movably arranged on the rack through a gantry, and the laser cutting machine further comprises a workbench, a water cooling mechanism, a sensor and an air cooling mechanism; the workbench is fixedly connected to the rack; the water cooling mechanism is used for water cooling and temperature reduction of the workbench; the sensor is provided in multiple numbers; the sensor is installed at the edge of the workbench and is used for sensing the position of the laser cutting head and controlling the water supply amount of the corresponding position; and the air cooling mechanism is arranged at the laser cutting head and is used for air cooling and temperature reduction of the laser cutting position. Through the technical scheme, the problem that heat distortion is formed at the cutting edge during laser cutting in the prior art, thereby affecting the machining quality, is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser cutting, in particular to a laser cutting machine for sheet metal cutting and a cutting process. BACKGROUND

[0002] Sheet metal processing is to cut and bend metal plates into a specific shape. In order to ensure cutting accuracy, a laser cutting machine is generally used to cut and process metal plates.

[0003] The laser cutting machine uses a high-power density laser beam to irradiate the material being cut, which quickly heats the material to the vaporization temperature, evaporates to form a hole, and as the light beam moves on the material, the hole continuously forms a narrow cutting seam, completing the cutting of the material. During the process of laser cutting the plate, due to the high-power laser heating the material, a high-temperature environment is quickly formed on both sides of the cutting track, resulting in thermal distortion at the cutting edge, thereby affecting the precision and quality of the cutting. SUMMARY

[0004] The present application provides a laser cutting machine for sheet metal cutting and a cutting process to solve the problem of thermal distortion at the cutting edge caused by laser cutting in the prior art, which affects the processing quality.

[0005] The technical solution of the present application is as follows: a laser cutting machine for sheet metal cutting, comprising a rack and a laser cutting head, the laser cutting head is movably arranged on the rack through a gantry, further comprising:

[0006] a workbench fixedly connected to the rack;

[0007] a water cooling mechanism for water cooling the workbench, the water cooling mechanism comprising:

[0008] a water cooler;

[0009] a plurality of cold water pipes, the cold water pipes are arranged inside the workbench;

[0010] an inlet pipe, the cold water pipe and the inlet pipe are in communication, and the cold water pipe is provided with an adjusting valve;

[0011] an outlet pipe, the outlet pipe and the cold water pipe are in communication away from the inlet pipe, and the inlet pipe and the outlet pipe are in communication with the water cooler;

[0012] a plurality of inductors, the inductors are installed on the edges of the workbench and are used to sense the position of the laser cutting head and control the water supply amount of the corresponding position, the inductors and the adjusting valves are in position correspondence, and the inductors and the adjusting valves are electrically connected;

[0013] The air cooling mechanism is arranged at the laser cutting head and used for air cooling and cooling of the laser cutting position, and the air cooling mechanism comprises:

[0014] An air cooling bin is fixedly connected at the laser cutting head, and a plurality of air outlet holes are formed in the bottom of the air cooling bin;

[0015] A fan is installed on the laser cutting head, and an air outlet of the fan is communicated with the air cooling bin.

[0016] In order to improve the air cooling effect, a water cooling pipe network is arranged in the air cooling bin, the water cooling pipe network is communicated with the water inlet pipe, an adapter is fixedly connected on the gantry, the adapter is communicated with the water cooling pipe network through an elastic hose one, and the adapter is communicated with the water inlet pipe through an elastic hose two.

[0017] In order to further cool the workbench, the water inlet pipe is communicated with a spray pipe, the spray pipe is located below the workbench, the spray pipe is communicated with a plurality of spray heads for spraying cold water below the workbench, and a water collecting tank is fixedly connected on the rack and located below the workbench for receiving the sprayed cold water.

[0018] In order to improve the cooling effect of the cold water pipe on the workbench, the cold water pipe is arranged in a bent shape in the inside of the workbench.

[0019] In order to promote the air flow below the workbench, a plurality of support blocks are fixedly connected on the rack, and the workbench is fixedly connected to the top end of the support blocks.

[0020] A laser cutting process for sheet metal cutting uses the above-mentioned laser cutting machine for sheet metal cutting, comprising the following steps:

[0021] S1, the plate is fixedly clamped at a suitable position of the workbench, the gantry drives the laser cutting head to move to the plate for laser cutting;

[0022] S2, the inductor senses that the laser cutting head moves to the corresponding position, transmits the electric signal to the controller to control the opening of the adjusting valve at the corresponding position, increases the flow of cold water, and rapidly cools the machining position;

[0023] S3, the laser cutting head drives the air cooling bin to move, the fan sends air to the inside of the air cooling bin, the water inlet pipe delivers cold water to the inside of the water cooling pipe network, and the cold air is blown to the cutting position through the air outlet holes;

[0024] S4, the water inlet pipe delivers cold water to the spray pipe, sprays cold water to the workbench through the spray head, further cools the workbench, and the water collecting tank receives the cold water and delivers the water back to the water chiller for circulating cooling.

[0025] The working principle and beneficial effects of the present application are as follows:

[0026] 1、In the present application, the laser cutting head is moved by the gantry to cut the sheet metal, the position of the gantry and the laser cutting head is sensed by the inductor, the adjusting valve at the corresponding position is opened to increase the amount of cold water at the cutting position, thereby rapidly cooling and cooling the cutting position.

[0027] 2、In the present application, the laser cutting head drives the air-cooled bin to move, the fan blows cold air into the air-cooled bin, and the water inlet pipe delivers cold water into the water-cooled pipe network, further cooling the air-cooled bin, and the cold air is blown to the surrounding of the laser cutting head through the air outlet hole, and the cutting position is cooled and cooled more accurately.

[0028] 3、In the present application, the water inlet pipe can deliver cold water into the spray pipe, and the cold water is sprayed on the lower side of the workbench through the spray head, and the workbench is further cooled and cooled by water, and the sprayed cold water falls into the water collecting tank for reuse.

[0029] 4、Compared with the laser cutting machine in the prior art, the present application cools and cools the workbench by the cold water pipe, senses the position of the laser cutting head by the inductor and controls the increase of the cold water flow in the cold water pipe at the corresponding position, and cools and cools the cutting position of the sheet metal more accurately, and at the same time, the cutting area is cooled and cooled by delivering cold air into the air-cooled bin moving with the laser cutting head, and the workbench is further cooled by spraying cold water on the lower side of the workbench through the spray pipe and the spray head, thereby cooling the sheet metal on the workbench, especially the cut sheet metal, reducing the thermal distortion of the cutting edge caused by high temperature generated by laser cutting, and ensuring the processing quality. BRIEF DESCRIPTION OF DRAWINGS

[0030] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0031] Figure 1 It is a structural schematic view of the first perspective of the whole application;

[0032] Figure 2 It is a structural schematic view of the second perspective of the whole application;

[0033] Figure 3 It is a structural schematic view of the workbench, support block, water cooling mechanism and air cooling mechanism of the present application;

[0034] Figure 4 It is a structural schematic view of the spray pipe, spray head, water cooling mechanism and water cooling pipe network of the present application;

[0035] Figure 5It is a structural schematic view of the air cooling mechanism of the present application.

[0036] Figure 6 It is a structural schematic view of the present application Figure 1 A local enlarged structural schematic view at A.

[0037] In the figure:

[0038] 1, rack; 2, laser cutting head; 3, gantry; 4, workbench; 5, support block; 6, inductor; 7, spray pipe; 8, spray head; 9, water collecting tank;

[0039] 101, water chiller; 102, cold water pipe; 103, water inlet pipe; 104, water outlet pipe; 105, regulating valve;

[0040] 201, air cooling bin; 202, air blower; 203, water cooling pipe network; 204, adapter; 205, flexible hose 1; 206, flexible hose 2. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are involved in the scope of protection of the present application.

[0042] As Figures 1 to 6 shown, the present embodiment proposes a laser cutting machine for sheet metal cutting, which comprises a rack 1 and a laser cutting head 2. The laser cutting head 2 is movably arranged on the rack 1 through a gantry 3. The laser cutting machine further comprises a workbench 4, a water cooling mechanism, an inductor 6 and an air cooling mechanism. The present application cools and lowers the temperature of the workbench 4 through a cold water pipe 102. The position of the laser cutting head 2 is sensed by the inductor 6, and the flow of cold water in the corresponding cold water pipe 102 is increased to cool and lower the temperature of the cutting position of the sheet metal more accurately. At the same time, cold air is delivered to the inside of an air cooling bin 201 moving with the laser cutting head 2 to cool and lower the temperature of the cutting area. Cold water is sprayed to the lower part of the workbench 4 through a spray pipe 7 and a spray head 8 to further cool the workbench 4, thereby cooling the sheet metal on the workbench 4, especially the sheet metal after cutting, reducing the thermal distortion of the cutting edge caused by the high temperature generated by laser cutting, and ensuring the processing quality.

[0043] As Figures 1 to 3As shown, the workbench 4 is fixedly connected to the rack 1, and a plurality of support blocks 5 are fixedly connected to the rack 1 to facilitate air flow below the workbench 4. The workbench 4 is fixedly connected to the top end of the support blocks 5, and a gap is formed between the workbench 4 and the rack 1 by the support blocks 5, so that air can pass through below the workbench 4, improving the heat dissipation of the workbench 4. The sheet metal plate is fixedly installed on the workbench 4 by the clamping mechanism and is moved by the gantry 3 and the laser cutting head 2. The movement track of the laser cutting head 2 is pre-set by the operation system, and the sheet metal plate is accurately cut. The movement of the gantry 3 and the laser cutting head 2 is a known prior art, which is not the main innovation of the present application, and will not be described here, which does not affect the understanding of the present application.

[0044] As shown in Figures 1 to 4 The water cooling mechanism is used for water cooling and temperature reduction of the workbench 4. The water cooling mechanism includes a water cooler 101, a cold water pipe 102, a water inlet pipe 103, and a water outlet pipe 104. The cold water pipe 102 is provided in a plurality of forms and is arranged in a bent form inside the workbench 4. The cold water pipe 102 and the water inlet pipe 103 are communicated. The cold water pipe 102 is provided with an adjusting valve 105. The water outlet pipe 104 is communicated with one end of the cold water pipe 102 away from the water inlet pipe 103. The water inlet pipe 103 and the water outlet pipe 104 are both communicated with the water cooler 101. The water cooler 101 produces cold water and delivers the cold water into the cold water pipe 102 through the water inlet pipe 103. The cold water in the cold water pipe 102 exchanges heat with the workbench 4 to cool and reduce the temperature of the workbench 4, thereby cooling and reducing the temperature of the sheet metal plate clamped on the workbench 4, reducing the deformation of the sheet metal plate after cutting. The cold water pipe 102 is arranged in a bent form inside the workbench 4, which can prolong the residence time of the cold water in the cold water pipe 102, that is, in the range of the workbench 4, and better cool and reduce the temperature of the workbench 4. The cold water in the cold water pipe 102 flows back to the inside of the water cooler 101 through the water outlet pipe 104 for circulation cooling.

[0045] The inductor 6 is provided in a plurality of forms and is installed on the edge of the workbench 4. The inductor 6 is used for sensing the position of the laser cutting head 2 and controlling the water supply amount of the corresponding position. The inductor 6 corresponds to the position of the adjusting valve 105 and is electrically connected with the adjusting valve 105. The inductor 6 can be selected from a distance sensor, a displacement sensor, or a pressure sensor, which can sense the movement of the gantry 3 or the laser cutting head 2, or the pressure sensor can be in contact with the moving gantry 3. When the gantry 3 moves to the position of the adjusting valve 105 and the cold water pipe 102 corresponding thereto, the inductor 6 senses the movement of the gantry 3 to the position of the cold water pipe 102 corresponding thereto, sends an electrical signal to the controller, controls the adjusting valve 105 to be opened, and increases the cold water flow in the cold water pipe 102, thereby improving the cooling effect of the region, that is, the cutting region, and accurately cooling the sheet metal plate. At the same time, the flow of cold water not in the working area can be reduced, and the work of the water cooler 101 can be reduced.

[0046] As Figures 1 to 5 shown, the air cooling mechanism is arranged at the laser cutting head 2 for air cooling and cooling the laser cutting position, the air cooling mechanism includes an air cooling bin 201 and a fan 202, the air cooling bin 201 is fixedly connected at the laser cutting head 2, a plurality of air outlet holes are formed in the bottom of the air cooling bin 201, the fan 202 is installed on the laser cutting head 2, the air outlet of the fan 202 and the air cooling bin 201 are communicated, a water cooling pipe network 203 is arranged in the air cooling bin 201, the water cooling pipe network 203 and the water inlet pipe 103 are communicated, a connector 204 is fixedly connected on the gantry 3, the connector 204 is communicated with the water cooling pipe network 203 through the first flexible hose 205, the connector 204 is communicated with the water inlet pipe 103 through the second flexible hose 206, the cold water flows into the inside of the water cooling pipe network 203 to reduce the temperature in the air cooling bin 201, the fan 202 sends air to the inside of the air cooling bin 201, the cold water in the air cooling bin 201 is blown downward to the laser cutting head 2 through the air outlet holes, the air cooling bin 201 moves with the laser cutting head 2 to accurately air cool and cool the edge position after cutting, the first flexible hose 205 and the second flexible hose 206 are flexible to adapt to the movement of the gantry 3 and the laser cutting head 2.

[0047] As Figure 4 shown, in order to further cool the workbench 4, the water inlet pipe 103 is communicated with a spray pipe 7, the spray pipe 7 is located below the workbench 4, the spray pipe 7 is communicated with a plurality of spray heads 8 for spraying cold water below the workbench 4, a water collecting tank 9 is fixedly connected on the rack 1, the water collecting tank 9 is located below the workbench 4 for collecting the spray cooling water, a valve is arranged on the spray pipe 7, a temperature sensor is installed on the workbench 4, when the temperature of the workbench 4 is too high, an electric signal can be transmitted to the controller to control the valve to open, the cold water is sent into the inside of the spray pipe 7, the cold water is sprayed below the workbench 4 through the spray heads 8 to further water cool and cool the workbench 4, the sprayed cold water falls into the inside of the water collecting tank 9, the water in the water collecting tank 9 can be pumped back to the inside of the cold water machine 101 for recycling, or can be delivered to other positions for water utilization.

[0048] The embodiment also provides a laser cutting process for sheet metal cutting, which uses the above laser cutting machine for sheet metal cutting, and includes the following steps:

[0049] S1, the plate is fixedly clamped at a suitable position of the workbench 4, the gantry 3 drives the laser cutting head 2 to move to the plate for laser cutting;

[0050] S2, the sensor 6 senses that the laser cutting head 2 moves to the corresponding position, transmits an electric signal to the controller to control the adjusting valve 105 of the corresponding position to open, and increases the flow of the cold water to rapidly cool the machining position.

[0051] S3, the laser cutting head 2 drives the air cooling bin 201 to move, the fan 202 blows air to the inside of the air cooling bin 201, and the water inlet pipe 103 transports cold water to the inside of the water cooling pipe network 203; the cold air is blown to the cutting position through the air outlet hole;

[0052] S4, the water inlet pipe 103 transports cold water to the spray pipe 7, and the cold water is sprayed to the workbench 4 through the spray head 8, so that the workbench 4 is further cooled, the water collecting tank 9 receives the cold water and transports the water back to the water cooler 101 for circulating cooling.

[0053] The above is only a preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A laser cutting machine for cutting sheet metal, comprising a frame (1) and a laser cutting head (2), wherein the laser cutting head (2) is movably mounted on the frame (1) via a gantry frame (3), characterized in that, Also includes: Workbench (4), which is fixedly connected to the frame (1); A water-cooling mechanism is used to cool the workbench (4) by water cooling. Sensor (6), multiple sensors (6) are provided, and the sensors (6) are installed on the edge of the workbench (4) to sense the position of the laser cutting head (2) and control the water supply at the corresponding position; Air-cooling mechanism, which is located at the laser cutting head (2), is used to cool the laser cutting position by air-cooling. The water cooling mechanism includes: Chiller (101); A cold water pipe (102) is provided in multiple forms, and the cold water pipe (102) is provided inside the workbench (4); Water inlet pipe (103), cold water pipe (102) and water inlet pipe (103) are connected, a regulating valve (105) is provided on cold water pipe (102), the position of sensor (6) and regulating valve (105) are corresponding, and sensor (6) and regulating valve (105) are electrically connected. The water outlet pipe (104) and the cold water pipe (102) are connected at the end away from the water inlet pipe (103), and both the water inlet pipe (103) and the water outlet pipe (104) are connected to the chiller (101); The air-cooling mechanism includes: Air-cooled chamber (201), which is fixedly connected to the laser cutting head (2), and the bottom of the air-cooled chamber (201) is provided with multiple air outlets; A fan (202) is installed on the laser cutting head (2), and the air outlet of the fan (202) is connected to the air-cooled chamber (201); the air-cooled chamber (201) is equipped with a water-cooled pipe network (203), and the water-cooled pipe network (203) is connected to the water inlet pipe (103); The gantry (3) is fixedly connected to an adapter (204), which is connected to the water cooling network (203) through a first telescopic hose (205) and the water inlet pipe (103) through a second telescopic hose (206). The water inlet pipe (103) is connected to a spray pipe (7), which is located below the workbench (4). The spray pipe (7) is connected to a plurality of nozzles (8) for spraying cold water onto the lower part of the workbench (4). The sensor (6) senses the position of the laser cutting head (2) and controls the flow rate of cold water in the corresponding cold water pipe to increase; a valve is provided on the spray pipe (7) and a temperature sensor is installed on the workbench (4). When the temperature of the workbench (4) is too high, an electrical signal can be transmitted to the controller to control the valve to open.

2. The laser cutting machine for cutting sheet metal as described in claim 1, characterized in that, A water collection tank (9) is fixedly connected to the frame (1). The water collection tank (9) is located below the workbench (4) and is used to receive sprayed cold water.

3. The laser cutting machine for cutting sheet metal as described in claim 2, characterized in that, The cold water pipe (102) is bent and installed inside the workbench (4).

4. A laser cutting machine for cutting sheet metal as described in claim 3, characterized in that, Multiple support blocks (5) are fixedly connected to the frame (1), and the workbench (4) is fixedly connected to the top of the support blocks (5).

5. A laser cutting process for cutting sheet metal, using the laser cutting machine for cutting sheet metal as described in claim 4, characterized in that... Includes the following steps: S1. Fix the plate in a suitable position on the worktable (4), and the gantry (3) drives the laser cutting head (2) to move to the plate for laser cutting. S2, Sensor (6) senses that the laser cutting head (2) has moved to the corresponding position, and transmits an electrical signal to the controller to control the opening of the regulating valve (105) at the corresponding position, increasing the flow rate of cold water to quickly cool down the processing position; S3. The laser cutting head (2) drives the air-cooled chamber (201) to move, the fan (202) blows air into the air-cooled chamber (201), the water inlet pipe (103) delivers cold water into the water-cooled pipe network (203), and the cold air is blown to the cutting position through the air outlet. S4. The inlet pipe (103) delivers cold water to the spray pipe (7), and sprays cold water onto the workbench (4) through the nozzle (8) to further cool the workbench (4). The water collection tank (9) receives the cold water and sends it back to the chiller (101) for circulating cooling.

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