A laser cutting machine for heat shrink tube

Abstract

The utility model relates to laser cutting machine technical field especially relates to a heat shrink tube laser cutting machine, including work table, the middle part position of work table is fixed and installed with cutting machine body across, the upper end of work table is provided with the support frame, one end fixed mounting of inside of support frame is equipped with the shaft seat, the inside rotation of shaft seat is equipped with the axle rod, one end of inside of support frame is fixed and installed with motor through the support far from the shaft seat, the inside of motor is provided with the shaft for driving. In the cutting process, the motor drives the axle rod with symmetrical reverse thread to rotate, makes two thread sleeves drive the limit block along the limit hole synchronous and moves to each other or opposite, thereby carries out position definition to heat shrink tube from both sides, and this positioning mode only carries out the guidance constraint to the material through the contact surface, completely avoids the mechanical extrusion of traditional clamping mechanism, especially suitable for the heat shrink tube processing of hard material.

Description

Technical Field

[0001] This utility model relates to the field of laser cutting machine technology, and in particular to a heat shrink tubing laser cutting machine. Background Technology

[0002] Heat shrink tubing is a functional material widely used in electrical, electronic, communication, automotive, and aerospace industries. When heated, it shrinks and tightly wraps around wires, cables, connectors, etc., providing insulation, protection, moisture resistance, and corrosion protection.

[0003] With the development of technology and the expansion of application fields, higher requirements are placed on the processing precision and efficiency of heat shrink tubing. For example, Chinese Patent Publication No. CN205129942U provides an automatic heat shrink tubing cutting machine, which includes: a frame, a vertical pressure cylinder, a horizontal cutting cylinder, a pressure plate, a cutting blade, and a solenoid valve. The top surface of the frame forms a working platform, and the vertical pressure cylinder and pressure plate are located above the working platform. The vertical pressure cylinder can drive the pressure plate to move up and down. The horizontal cutting cylinder is located on one side of the frame and is connected to the cutting blade via a moving blade holder device. The cutting blade is slidably mounted on the working platform. The solenoid valve is electrically connected to both the vertical pressure cylinder and the horizontal cutting cylinder. This automatic heat shrink tubing cutting machine is convenient to use, has a simple structure, and features integrated downward pressure cutting, clean cuts, high speed, and a high degree of automation.

[0004] Currently, due to the varying diameters and lengths of heat shrink tubing, some heat shrink tubing with slightly higher hardness may not be properly clamped and positioned during cutting, easily leading to uneven cuts. Additionally, because the cutting distance of the laser head is limited, if the tubing diameter is different, the height of the heat shrink tubing cannot be adjusted during cutting, easily resulting in the distance between the tubing and the laser head not being within the standard range, thus reducing the quality of the cutting process or preventing normal cutting. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a heat shrink tubing laser cutting machine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: Design a heat shrink tubing laser cutting machine, including a worktable, a cutting machine body is fixedly installed across the middle of the worktable, a support frame is provided at the upper end of the worktable, a bearing is fixedly installed at one end of the inner side of the support frame, a shaft is rotatably installed inside the bearing, and a motor is fixedly installed at the end of the inner side of the support frame away from the bearing via a bracket. The motor has a drive shaft inside, and the end of the shaft is fixedly connected to a shaft rod via a coupling. The surface of the shaft rod is symmetrically provided with external threads, and a threaded sleeve is installed on the surface of the external threads. A limit block is fixedly installed on the upper end of the outer ring wall of the threaded sleeve. The upper end of the support frame has a limit hole that penetrates through it. The limit block slides tightly against the inner wall of the limit hole and penetrates through it.

[0007] Preferably, a support frame is fixedly installed at the upper end of the support frame. The support frame has a U-shaped structure, and a cylinder is installed through the middle of the support frame.

[0008] Preferably, the cylinder has a piston rod for telescopic extension inside, and a positioning block is fixedly installed at the end of the piston rod, with the lower end of the positioning block having a concave curved surface structure.

[0009] Preferably, a plurality of cylinders are fixedly installed inside the workbench, and piston rods for telescopic extension are provided inside the cylinders. The ends of the plurality of piston rods are connected to the same lifting plate, and the lower end of the support frame is fixed to one side of the upper end of the lifting plate.

[0010] Preferably, a pad is fixedly installed on the upper end of the lifting plate. The pad is a metal plate, and a heat-conducting pipe for passing cold water is embedded and fixed inside the pad. The heat-conducting pipe has flange interfaces at both ends for water inlet and outlet.

[0011] Preferably, a guide rail sub-guide is fixedly installed on the inner wall of the arched channel of the cutting machine body, a guide rail sub-slide block is slidably arranged on the surface of the guide rail sub-guide, a cylinder three is fixedly installed at the lower end of the guide rail sub-slide block, and a piston rod three for extension and retraction is arranged inside the cylinder three.

[0012] Preferably, an extension plate is fixedly installed at the end of the piston rod of the cylinder three, and a laser cutting head is fixedly installed through the end of the extension plate away from the cylinder three.

[0013] The design scheme proposed in this utility model has the following beneficial effects in application: 1. In the cutting process, the motor drives the shaft with symmetrical reverse threads to rotate, so that the two threaded sleeves drive the limiting blocks to move synchronously towards or away from each other along the limiting holes, thereby limiting the position of the heat shrink tubing from both sides. This positioning method guides and constrains the material only through the contact surface, completely avoiding the mechanical squeezing caused by the traditional clamping mechanism, and is especially suitable for processing heat shrink tubing with harder materials. 2. This solution uses multiple cylinders at the bottom to synchronously drive the lifting plate, thereby adjusting the vertical height of the entire support frame. This design can flexibly compensate for the working distance between the laser cutting head and the workpiece. Combined with the lateral translation and cutting capability achieved by the guide rail system driving the laser cutting head, and the vertical feed function of the cutting head controlled by three cylinders, it together constitutes a three-axis linkage precision cutting system. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall front structure of this utility model; Figure 2 This is a schematic diagram of the overall side structure of this utility model; Figure 3 This is a front view of the connection between the support frame and the support bracket of this utility model; Figure 4 This is a schematic diagram of the laser head moving structure of this utility model.

[0015] In the diagram: 1. Workbench; 11. Cutting machine body; 12. Support frame; 13. Shaft seat; 14. Shaft rod; 15. External thread; 16. Threaded sleeve; 17. Limiting hole; 18. Limiting block; 19. Motor; 2. Cylinder 1; 20. Support frame; 21. Positioning block; 3. Lifting plate; 31. Cylinder 2; 32. Pad plate; 33. Heat pipe; 34. Flange interface; 4. Guide rail pair guide rail; 41. Guide rail pair slide; 42. Cylinder 3; 43. Extension plate; 44. Laser cutting head. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figures 1-4 A heat shrink tubing laser cutting machine includes a worktable 1, a cutting machine body 11 fixedly mounted across the middle of the worktable 1, a support frame 12 at the upper end of the worktable 1, a bearing seat 13 fixedly mounted on one inner end of the support frame 12, a shaft rod 14 rotatably mounted inside the bearing seat 13, and a motor 19 fixedly mounted on the inner end of the support frame 12 away from the bearing seat 13 via a bracket. The shaft rod 14 can rotate stably based on the bearing seat 13. The motor 19 is externally connected to a forward and reverse switch, so that after the motor 19 is started, the rotating shaft can rotate in both directions and drive the shaft rod 14 to move in conjunction. The motor 19 has a drive shaft inside, and the end of the shaft is fixedly connected to the shaft rod 14 via a coupling. The surface of the shaft rod 14 is symmetrically provided with external threads 15. A threaded sleeve 16 is installed on the surface of the external threads 15. A limit block 18 is fixedly installed on the upper end of the outer ring wall of the threaded sleeve 16. The upper end of the support frame 12 has a limit hole 17 that passes through it. The limit block 18 slides tightly against the inner wall of the limit hole 17 and passes through it. When the shaft rod 14 rotates, the external threads 15 can rotate synchronously, and the threaded sleeve 16 can move. By the limit block 18 sliding in the limit hole 17 and the two external threads 15 being arranged opposite each other, the two limit blocks 18 can move closer or further away synchronously. This allows the relatively hard heat shrink tubing to be positioned on both sides during cutting without clamping, thus avoiding clamping damage.

[0018] Among them, a support frame 20 is fixedly installed on the upper end of the support frame 12. The support frame 20 has a U-shaped structure. A cylinder 2 is installed through the middle of the support frame 20. The cylinder 2 can stably place the support frame 20 above the middle of the support frame 12.

[0019] The cylinder 2 has a piston rod for telescopic movement inside, and a positioning block 21 is fixedly installed at the end of the piston rod. The lower end of the positioning block 21 has a concave curved surface structure. By extending the piston rod of the cylinder 2, the positioning block 21 can move downwards. In conjunction with the support frame 12, the upper and lower positions of the heat shrink tubing are appropriately positioned during cutting, without producing a clamping effect.

[0020] The workbench 1 has several cylinders 31 fixed inside. Each cylinder 31 has a piston rod for telescopic movement. The ends of the piston rods are connected to the same lifting plate 3. The lower end of the support frame 12 is fixed to the upper side of the lifting plate 3. By telescopic movement of the piston rods of the cylinders 31, the lifting plate 3 can be adjusted in height along with the support frame 12. This allows for height compensation with the laser cutting head 44 during laser cutting.

[0021] Among them, a pad 32 is fixedly installed on the upper end of the lifting plate 3. The pad 32 is a metal plate. A heat-conducting pipe 33 that can be circulated with cold water is embedded and fixed inside the pad 32. The heat-conducting pipe 33 has flange interfaces 34 at both ends for water inlet and outlet. In order to avoid heat transfer during laser cutting, cold water can be circulated in the heat-conducting pipe 33 so that the entire pad 32 can be cooled by cold water.

[0022] The cutting machine body 11 has a guide rail 4 fixedly installed on the inner wall of the arched channel. A guide rail slide 41 is slidably installed on the surface of the guide rail 4. A cylinder 3 42 is fixedly installed at the lower end of the guide rail slide 41. The cylinder 3 42 has a piston rod 3 for extension and retraction inside, so that the laser cutting head 44 can move up and down to realize the laser cutting of heat shrink tubing. The guide rail slide 41 can slide on the guide rail 4, which can drive the laser cutting head 44 to perform translational cutting during cutting.

[0023] Among them, the piston rod of cylinder 3 42 is fixedly installed with extension plate 43 at the three ends. The end of extension plate 43 away from cylinder 3 42 is fixedly connected with laser cutting head 44. The control unit of laser cutting head 44 is connected to the processing unit of cutting machine body 11 via data line signal. The guide rail pair 4 and guide rail pair slide 41 are linear guide rail pairs. They move linearly by means of lead screw driven by servo motor control. The servo motor is also connected to the processing unit of cutting machine body 11 via data line.

[0024] Working method: The cylinder 2 31 installed inside the workbench 1 starts to work, and its piston rod 2 extends or retracts, driving the lifting plate 3 connected to the end of the piston rod 2 to move vertically. Since the support frame 12 is fixedly installed on the upper side of the lifting plate 3, the support frame 12 and all its components will rise and fall as a whole. This height adjustment function is mainly used to compensate for the distance between the laser cutting head 44 and the heat shrink tubing, ensuring that the cutting process is within the optimal focal length range. Then, the cylinder 2 on the U-shaped support frame 20 installed at the upper end of the support frame 12 starts, and its piston rod 1 extends downward, pushing the positioning block 21 at the lower end to press down. The lower end of the positioning block 21 is designed with a concave curved surface structure, which can fit the upper surface of the heat shrink tubing and position it appropriately in the vertical direction. This process emphasizes positioning rather than rigid clamping to avoid causing indentations or damage to the material surface. The shaft of motor 19 is directly connected to shaft 14 via a coupling. Shaft 14 is rotatably mounted in shaft seat 13. Its surface is machined with two sections of external threads 15 with opposite directions of rotation and symmetrical distribution. Each section of external thread 15 is equipped with a threaded sleeve 16. When motor 19 receives a forward or reverse signal and starts, it drives shaft 14 to rotate. The two sections of external threads 15 rotate synchronously. Since the two threaded sleeves 16 are respectively engaged with threads with opposite directions of rotation, and each threaded sleeve 16 has a fixed limit block 18 at its upper end, these limit blocks 18 are embedded and slide in the limit hole 17 opened at the upper end of support frame 12. The limit hole 17 effectively restricts the threaded sleeves 16 from rotating with shaft 14, forcing them to only perform linear motion. Therefore, the rotation of shaft 14 will be converted into the two threaded sleeves 16 carrying the limit blocks 18 on them moving synchronously towards or away from each other along the limit hole 17. The guide rail slide 41 is controlled by a servo motor-driven lead screw mechanism, which can move precisely in a straight line along the guide rail 4. The cylinder 3 42, which is fixed at the lower end of the guide rail slide 41, has a piston rod 3 that can extend and retract. The end of the piston rod 3 is connected to the extension plate 43, and the laser cutting head 44 is fixed through and fixed to the end of the extension plate 43. The entire cutting process is as follows: First, the guide rail slide 41, driven by the servo motor, moves the laser cutting head 44 to the preset cutting starting point. Then, the piston rod 3 of the cylinder 3 42 extends to adjust the final working distance between the laser cutting head 44 and the positioned heat shrink tube. After preparation, the laser cutting head 44 emits laser according to the instructions issued by the processing unit of the cutting machine body 11. At the same time, the guide rail slide 41 drives the laser cutting head 44 to move smoothly, thereby performing continuous or point-to-point laser cutting on the heat shrink tube. The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A heat shrink tubing laser cutting machine, comprising a worktable (1), characterized in that: The cutting machine body (11) is fixedly installed across the middle of the workbench (1). A support frame (12) is provided at the upper end of the workbench (1). A bearing seat (13) is fixedly installed at one end of the inner side of the support frame (12). A shaft rod (14) is rotatably installed inside the bearing seat (13). A motor (19) is fixedly installed at the end of the inner side of the support frame (12) away from the bearing seat (13) through a bracket. The motor (19) has a drive shaft inside, and the end of the shaft is fixedly connected to a shaft (14) via a coupling. The shaft (14) has symmetrically distributed external threads (15) on its surface. A threaded sleeve (16) is installed on the surface of the external threads (15). A limit block (18) is fixedly installed on the upper end of the outer ring wall of the threaded sleeve (16). A limit hole (17) is opened at the upper end of the support frame (12) and penetrates through it. The limit block (18) slides tightly against the inner wall of the limit hole (17) and penetrates through it.

2. The heat shrink tubing laser cutting machine according to claim 1, characterized in that: The upper end of the support frame (12) is fixedly installed with a support frame (20). The support frame (20) has a U-shaped structure, and a cylinder (2) is installed through the middle of the support frame (20).

3. The heat shrink tubing laser cutting machine according to claim 2, characterized in that: The cylinder (2) is equipped with a piston rod for telescopic movement, and a positioning block (21) is fixedly installed at the end of the piston rod. The lower end of the positioning block (21) is a concave curved surface structure.

4. A heat shrink tubing laser cutting machine according to claim 3, characterized in that: The workbench (1) has several cylinders (31) fixed inside. The cylinders (31) have piston rods (2) for telescopic movement inside. The ends of the several piston rods (2) are all mounted on the same lifting plate (3). The lower end of the support frame (12) is fixed to the upper side of the lifting plate (3).

5. A heat shrink tubing laser cutting machine according to claim 4, characterized in that: The upper end of the lifting plate (3) is also fixedly installed with a pad (32). The pad (32) is a metal plate. A heat-conducting pipe (33) that can be passed through cold water is embedded and fixed inside the pad (32). The heat-conducting pipe (33) has flange interfaces (34) at both ends for water inlet and water outlet.

6. A heat shrink tubing laser cutting machine according to claim 5, characterized in that: The inner wall of the arched channel of the cutting machine body (11) is fixedly installed with a guide rail sub-guide rail (4), and a guide rail sub-slide seat (41) is slidably provided on the surface of the guide rail sub-guide rail (4). A cylinder three (42) is fixedly installed at the lower end of the guide rail sub-slide seat (41), and a piston rod three for extension and retraction is provided inside the cylinder three (42).

7. A heat shrink tubing laser cutting machine according to claim 6, characterized in that: An extension plate (43) is fixedly installed at the three ends of the piston rod of the cylinder three (42), and a laser cutting head (44) is fixedly installed through the end of the extension plate (43) away from the cylinder three (42).

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