Laser Cutting Machine and Control Method for Dividing the Substrate of Plastic Fruit and Vegetable Boxes

Abstract

The present invention discloses a laser cutting machine and a control method for dividing the base material of a plastic fruit and vegetable box, which relates to the technical field of plastic base material cutting. In the present invention, it includes a box body and a moving frame. A plurality of support plates are fixedly arranged on the surface of the box body. By setting an optoelectronic distance sensor, when it is necessary to clean the waste residue on the surface of the support plate, the moving frame drives the optoelectronic distance sensor to move, detects the thickness of the waste residue on the surface of the support plate, and then uses the cooperation of a laser cutting tool head and an air outlet pipe. The laser cutting tool head cuts the waste residue, and the air outlet pipe blows the waste residue off. When the air outlet pipe blows air, the air blower adjusts the air outlet power according to the thickness of the waste residue on the surface of the support plate, realizing the energy-saving and high-efficiency cleaning of the waste residue. Such a method cleans the waste residue on the surface of the support plate relatively cleanly, does not need to scrape the support plate repeatedly for many times, speeds up the cleaning efficiency, and improves the process efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic substrate cutting, and specifically to a laser cutting machine and a control method for dividing the plastic substrate of a fruit and vegetable box. Background Art

[0002] Laser cutting is to emit the laser from a laser, and through an optical path system, it is focused into a laser beam with a high power density. The laser beam irradiates the surface of the workpiece, causing the workpiece to reach the melting point or boiling point. At the same time, the high-pressure gas coaxial with the beam blows away the melted or vaporized metal. As the relative position of the beam and the workpiece moves, finally a cut is formed on the material, thus achieving the purpose of cutting.

[0003] In the actual production process, the common laser cutting machine workbench is generally composed of multiple parallel arranged support plates. There is a gap for waste residue to fall between adjacent support plates. Since the workpiece is easy to adhere to the support plate after melting, the waste residue formed after cooling is difficult to fall from the support plate and is difficult to clean. Generally, a scraper is used to scrape the surface of the support plate.

[0004] The existing treatment method is to scrape off the residue attached to the surface of the support plate during the movement of the scraper. However, in this way, when the scraper scrapes the waste residue on the support plate, the waste residue will adhere to the scraper, and the scraper will continue to move after adhering to the waste residue. The scraper will drive the attached waste residue to adhere to the support plate again when moving, making the waste residue on the surface of the support plate not completely scraped off, and it is necessary to scrape the surface of the support plate repeatedly for many times, reducing the production efficiency of the process.

[0005] Facing the above situation, how to effectively solve the contradiction between the cleaning degree of the residual waste residue on the surface of the support plate and the process efficiency has become a problem to be solved. Summary of the Invention

[0006] To solve the above technical problems, the present invention provides a laser cutting machine and a control method for dividing the plastic substrate of a fruit and vegetable box, which realizes that after cutting is completed, an optoelectronic distance sensor is used to detect the thickness of the waste residue on the surface of the support plate, and through the cooperation of the laser cutting tool head and the blower, the cut waste residue is blown into the box for collection, improving the process efficiency.

[0007] To achieve the above object, the present invention provides the following technical solution: A laser cutting machine for dividing the plastic substrate of a fruit and vegetable box, including a box body and a moving frame, and a plurality of support plates are fixedly arranged on the surface of the box body.

[0008] One side of the box body is fixedly provided with a first protective shell, one end of the first protective shell is fixedly provided with a first motor, a first lead screw is rotatably connected inside the first protective shell, the output end of the first motor is connected to the first lead screw, and the other side of the box body is fixedly provided with a second protective shell, and a limiting rod is fixedly arranged inside the second protective shell.

[0009] Limit blocks are fixedly arranged at both ends of the moving frame. An active block is fixedly connected to the bottom of the limit block. One of the active blocks is threadedly connected to the first lead screw, and the other active block is sleeved outside the limit rod.

[0010] A second motor is fixedly arranged on one side of the moving frame. A second lead screw is rotatably connected inside the moving frame. The output end of the second motor is connected to the second lead screw. A moving block is threadedly connected to the outside of the second lead screw. A laser cutting tool head is arranged at the bottom of the moving block. A blower is arranged on the top of the moving frame. One end of the blower is communicated with an air flow hose, and the other end of the air flow hose is communicated with an air outlet pipe.

[0011] A plurality of photoelectric distance sensors for detecting the thickness of waste residue on the surface of the support plate are fixedly arranged on one side of the moving frame. The second motor is configured with a photoelectric position encoding module for monitoring the real-time rotation stroke of the motor. By determining the rotation (number of turns) stroke of the second motor through the position encoding module and according to the rotational propulsion displacement relationship between the second lead screw and the moving block, the moving position of the moving block, that is, the air outlet pipe, can be directly judged. This technical method of judging the moving distance and position of the external mechanism driven by the motor by configuring a position encoding module in the motor is relatively common in the prior art and will not be elaborated in the present invention.

[0012] As a preferred technical solution of the present invention, the moving block and the laser cutting tool head are fixedly connected through a connecting block. One end of the connecting block is fixedly connected to a fixed block, and the fixed block is connected to the air outlet pipe.

[0013] As a preferred technical solution of the present invention, a slot for the movement of the air flow hose is formed on the surface of the moving frame.

[0014] As a preferred technical solution of the present invention, a moving slot for the movement of the moving block is formed inside the moving frame.

[0015] As a preferred technical solution of the present invention, a maintenance door for discharging waste residue is formed on one side of the box body.

[0016] As a preferred technical solution of the present invention, the air outlet pipe is inclined. The air outlet end of the air outlet pipe faces the cutting direction of the laser cutting tool head. In this way, when the laser cutting tool head cuts the waste residue, the air outlet pipe can be aligned with the waste residue to blow away the waste residue in time.

[0017] As a preferred technical solution of the present invention, grooves for the movement of the limit blocks are formed on the surfaces of the first protective shell and the second protective shell.

[0018] The present invention provides a control method for a laser cutting machine for dividing the base material of plastic fruit and vegetable boxes, including the following steps:

[0019] S1. First, manually clean the surface of the support plate. Start the first motor to drive the moving frame to move. At the same time, start the photoelectric distance sensor to perform an initial distance detection on the smooth surface of the support plate. Let the distance parameters detected by multiple photoelectric distance sensors during the movement be: F(L 1x )、F(L 2x )、F(L 3x )、...、F(L nx ), and let the distance parameter of any point S a on the support plate surface without foreign objects be L x .

[0020] S2. Place the plastic substrate on the surface of the support plate. Start the first motor and the second motor to drive the laser cutting head to move, facilitating the laser cutting head to cut the plastic substrate. The waste residue generated by the cutting falls onto the support plate.

[0021] S3. After completing the cutting of the plastic substrate, start the first motor to drive the moving frame to move. At the same time, start the photoelectric distance sensor. Let the distance parameters detected by multiple photoelectric distance sensors during the movement be: F(L 1y )、F(L 2y )、F(L 3y )、...、F(L ny ). It should be noted that any one of the above distance parameters, combined with Figure 5 , taking F(L ny ) as an example, is actually a set of continuously changing longitudinal vertical distance values generated within a certain horizontal range. In addition, the above F(L nx ) is also detected in the same way.

[0022] Let the distance parameter of any point S a on the support plate surface detected at this stage be L y . Calculate the waste residue thickness difference △L of any point S a = L y - L x .

[0023] S4. After completing the detection of the waste residue thickness on the support plate surface, start the first motor and the second motor to drive the laser cutting head and the air outlet pipe to move. Start the blower and the laser cutting head.

[0024] S5. The laser cutting head cuts the waste residue on the support plate surface during movement, and the blower blows the waste residue cut by the laser cutting head through the air outlet pipe.

[0025] Let the real-time power of the laser cutting head be P j , and let the real-time power P x of the blower delivering air to the air outlet pipe. Then F(Pj ) ∝ F(△L), F(P x ) ∝ F(△L), where F(△L) is the function parameter value of the waste residue thickness difference △L, F(P j ) is the function parameter value of the real-time power of the laser cutting tool head, F(P x ) is the function parameter value of the real-time air outlet power of the fan.

[0026] The present invention provides a laser cutting machine and a control method for dividing the base material of a plastic fruit and vegetable box, having the following

[0027] Beneficial effects:

[0028] By setting an optoelectronic distance sensor in the present invention, when it is necessary to clean the waste residue on the surface of the support plate, the moving frame drives the optoelectronic distance sensor to move, detects the thickness of the waste residue on the surface of the support plate, and then uses the cooperation of the laser cutting tool head and the air outlet pipe. The laser cutting tool head cuts the waste residue, and the air outlet pipe blows the waste residue off. When the air outlet pipe blows air, the fan adjusts the air outlet power according to the actual thickness of the waste residue at each position point on the surface of the support plate, realizing the energy-saving and high-efficiency of waste residue cleaning. Such a method cleans the waste residue on the surface of the support plate relatively cleanly, without repeatedly scraping the support plate many times, accelerating the cleaning efficiency and improving the process efficiency. Description of the Drawings

[0029] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention.

[0030] Figure 2 It is a schematic diagram of the sectional structure of the first protective shell and the second protective shell of the present invention.

[0031] Figure 3 It is a schematic diagram of the sectional structure of the moving frame of the present invention.

[0032] Figure 4 It is a schematic diagram of the explosion structure of the air flow hose of the present invention.

[0033] Figure 5 It is a schematic diagram of the relationship of distance detection for the optoelectronic distance sensor to detect the waste residue on the surface of the support plate.

[0034] In the figure: 1, box body; 2, first protective shell; 21, first lead screw; 3, first motor; 4, second motor; 5, support plate; 6, second protective shell, 61, limit rod; 7, moving frame, 71, second lead screw, 72, moving block, 73, moving groove, 74, slot, 75, limit block, 76, movable block; 8, optoelectronic distance sensor; 9, fan, 91, air flow hose, 92, air outlet pipe; 10, laser cutting tool head; 11, maintenance door; 12, connecting block; 13, fixed block. Detailed Embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0036] Embodiment 1: The present invention designs a laser cutting machine for dividing the base material of plastic fruit and vegetable boxes, which mainly includes the following:

[0037] Combined with Figure 1 、 Figure 2 , the box body 1 and the moving frame 7. An inspection door for discharging waste residue is provided on one side of the box body 1. A plurality of support plates 5 are fixedly arranged on the surface of the box body 1. A first protective shell 2 is fixedly arranged on one side of the box body 1. A first motor 3 is fixedly arranged at one end of the first protective shell 2. A first lead screw 21 is rotatably connected inside the first protective shell 2. The output end of the first motor 3 is connected to the first lead screw 21. A second protective shell 6 is fixedly arranged on the other side of the box body 1. Grooves for the movement of the limit blocks 75 are provided on the surfaces of the first protective shell 2 and the second protective shell 6. A limit rod 61 is fixedly arranged inside the second protective shell 6. Limit blocks 75 are fixedly arranged at both ends of the moving frame 7. An active block 76 is fixedly connected to the bottom of the limit block 75. One of the active blocks 76 is threadedly connected to the first lead screw 21, and the other active block 76 is sleeved outside the limit rod 61.

[0038] Combined with Figure 3 、 Figure 4 , a second motor 4 is fixedly arranged on one side of the moving frame 7. A second lead screw 71 is rotatably connected inside the moving frame 7. The output end of the second motor 4 is connected to the second lead screw 71. A moving block 72 is threadedly connected to the outside of the second lead screw 71. A moving groove 73 for the movement of the moving block 72 is provided inside the moving frame 7. A laser cutting tool head 10 is arranged at the bottom of the moving block 72. A blower 9 is arranged on the top of the moving frame 7. One end of the blower 9 is communicated with an air flow hose 91. A slot 74 for the movement of the air flow hose 91 is provided on the surface of the moving frame 7. The other end of the air flow hose 91 is communicated with an air outlet pipe 92. The air outlet pipe 92 is inclined. The air outlet end of the air outlet pipe 92 faces the cutting direction of the laser cutting tool head 10. The moving block 72 and the laser cutting tool head 10 are fixedly connected through a connecting block 12. One end of the connecting block 12 is fixedly connected to a fixing block 13. The fixing block 13 is connected to the air outlet pipe 92. A plurality of photoelectric distance sensors 8 for detecting the thickness of the waste residue on the surface of the support plate 5 are fixedly arranged on one side of the moving frame 7. The second motor 4 is configured with a photoelectric position encoding module for monitoring the real-time rotation stroke of the motor.

[0039] Embodiment 2: In the present invention, the control method of the laser cutting machine for dividing the base material of plastic fruit and vegetable boxes has the following specific working principle:

[0040] First, manually clean the surface of the support plate 5. Start the first motor 3 to drive the moving frame 7 to move, and at the same time start the photoelectric distance sensor 8. During the movement of the moving frame 7, the photoelectric distance sensor 8 is driven to move, and the photoelectric distance sensor 8 performs an initial distance detection on the support plate 5.

[0041] Then, place the plastic substrate on the surface of the support plate 5. Start the first motor 3 and the second motor 4 to drive the laser cutting head 10 to move. During the movement, the laser cutting head 10 cuts the plastic substrate, and the waste residue generated by the cutting will fall onto the support plate 5.

[0042] After the plastic substrate is cut, start the first motor 3 to drive the moving frame 7 to move, and at the same time start the photoelectric distance sensor 8 to complete the detection of the thickness of the waste residue on the surface of the support plate 5.

[0043] Immediately afterwards, the moving frame 7 drives the laser cutting head 10 to move. During the movement, the laser cutting head 10 cuts the waste residue on the surface of the support plate 5, and the blower 9 blows the waste residue cut by the laser cutting head 10 through the air outlet pipe 92. The real-time power of the laser cutting head 10 is P j , and the real-time power of the blower 9 to convey air to the air outlet pipe 92 is P x , the greater the thickness △L of the waste residue on the surface of the support plate 5, the greater the real-time power of the laser cutting head 10 and the real-time air outlet power of the blower 9.

[0044] The blown waste residue will fall inside the box body 1. An inspection door is provided on one side of the box body 1. When it is necessary to clean the waste residue inside the box body 1, just open the inspection door to clean it.

[0045] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A control method for a laser cutting machine for dividing a plastic fruit and vegetable box substrate, characterized in that: Includes the following: S1. First, the surface of the support plate is cleaned manually. The first motor is started to drive the moving frame to move. At the same time, the photoelectric distance sensor is started to perform an initial distance detection on the smooth surface of the support plate. The distance parameters detected by multiple photoelectric distance sensors during the movement are: F(L 1x )、F(L 2x )、F(L 3x )、...、F(L nx ), assuming that there is no foreign matter on the support plate surface at any point S a The distance parameter is L x ; S2. Place the plastic substrate on the surface of the support plate, start the first motor and the second motor, drive the laser cutting head to move, and facilitate the laser cutting head to cut the plastic substrate, and the waste residue generated by the cutting falls onto the support plate; S3. After the cutting of the plastic substrate is completed, the first motor is started to drive the moving frame to move, and the photoelectric distance sensor is started at the same time. The distance parameters detected by the multiple photoelectric distance sensors during the movement are: F(L 1y )、F(L 2y )、F(L 3y )、...、F(L ny ); Assume that any point S on the support plate surface is detected at this stage a The distance parameter is L y ; Calculate any point S a Waste slag thickness difference △L=L y -L x ; S4. After completing the detection of the thickness of the waste residue on the support plate surface, start the first motor and the second motor to drive the laser cutting head and the air outlet pipe to move, and start the fan and the laser cutting head; S5. The laser cutting head cuts the waste residue on the surface of the support plate while moving, and the fan blows the waste residue cut by the laser cutting head through the air outlet pipe; Assume the real-time power of the laser cutting head is P j , assuming that the real-time power P of the fan delivering air to the air outlet duct x ; Then F(P j )∝F(△L),F(P x )∝F(△L), where F(△L) is the function parameter value of the waste slag thickness difference △L, F(P j ) is the function parameter value of the real-time power of the laser cutting head, F(P x ) is the real-time wind output power function parameter value of the fan.

2. A laser cutting machine for cutting plastic fruit and vegetable box substrates for implementing the control method of claim 1, comprising a box body (1) and a movable frame (7), wherein a plurality of support plates (5) are fixedly arranged on the surface of the box body (1), and characterized in that: A first protective shell (2) is fixedly arranged on one side of the box body (1), a first motor (3) is fixedly arranged on one end of the first protective shell (2), a first screw rod (21) is rotatably connected inside the first protective shell (2), an output end of the first motor (3) is connected to the first screw rod (21), a second protective shell (6) is fixedly arranged on the other side of the box body (1), a limit rod (61) is fixedly arranged inside the second protective shell (6); Limit blocks (75) are fixedly arranged at both ends of the movable frame (7), and a movable block (76) is fixedly connected to the bottom of the limit block (75), one of the movable blocks (76) is threadedly connected to the first screw rod (21), and the other movable block (76) is sleeved on the outer side of the limit rod (61); A second motor (4) is fixedly arranged on one side of the movable frame (7), a second screw rod (71) is rotatably connected inside the movable frame (7), an output end of the second motor (4) is connected to the second screw rod (71), an outer side of the second screw rod (71) is threadedly connected to a movable block (72), a laser cutting head (10) is arranged at the bottom of the movable block (72), a fan (9) is arranged on the top of the movable frame (7), one end of the fan (9) is connected to an air flow hose (91), and the other end of the air flow hose (91) is connected to an air outlet pipe (92); A plurality of photoelectric distance sensors (8) for detecting the thickness of waste residue on the surface of the support plate (5) are fixedly arranged on one side of the movable frame (7), and the second motor (4) is equipped with a photoelectric position encoding module for monitoring the real-time rotation stroke of the motor.

3. The laser cutting machine for dividing the plastic fruit and vegetable box substrate according to claim 2, characterized in that: The movable block (72) is fixedly connected to the laser cutting head (10) via a connecting block (12); one end of the connecting block (12) is fixedly connected to a fixed block (13); and the fixed block (13) is connected to an air outlet pipe (92).

4. The laser cutting machine for dividing the plastic fruit and vegetable box substrate according to claim 2, characterized in that: The surface of the movable frame (7) is provided with a slot (74) for the air flow hose (91) to move.

5. The laser cutting machine for dividing the plastic fruit and vegetable box substrate according to claim 2, characterized in that: The movable frame (7) is provided with a movable groove (73) inside for the movable block (72) to move.

6. The laser cutting machine for dividing the plastic fruit and vegetable box substrate according to claim 2, characterized in that: One side of the box body (1) is provided with an inspection door (11) for discharging waste slag.

7. The laser cutting machine for dividing the plastic fruit and vegetable box substrate according to claim 2, characterized in that: The air outlet pipe (92) is arranged at an angle, and the air outlet end of the air outlet pipe (92) faces the cutting direction of the laser cutting head (10).

8. The laser cutting machine for dividing the plastic fruit and vegetable box substrate according to claim 2, characterized in that: The surfaces of the first protective shell (2) and the second protective shell (6) are both provided with grooves for the limit block (75) to move.

Images