A cutting device and laser cutting machine

Abstract

The utility model relates to laser cutting equipment technical field, especially is a kind of cutting device and laser cutting machine.Cutting device includes rack, first guide rail, crossbeam, first driving device, second guide rail, second driving device, second tow chain and cutting assembly, first guide rail is set on rack, first driving device drives crossbeam to move along first guide rail, second guide rail is set on crossbeam and is perpendicular first guide rail setting, second driving device drives cutting assembly to move along second guide rail, the recess that extends along the direction of second guide rail is equipped in crossbeam top surface, second tow chain is set in recess, one end of second tow chain is fixed with the bottom of cutting assembly, the other end of second tow chain is fixed with crossbeam.By adopting the mode of tow chain underlay, second tow chain is set in the recess of crossbeam top, reduces the overall gravity center of crossbeam, effectively reduces overturning moment, so that the whole device is more stable in the process of operation, and then guarantee cutting accuracy, improve cutting quality.

Description

Technical Field

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

[0002] Laser cutting machines are typically driven by motors, so cable chains are used to protect the motor cables. To avoid affecting the motor's travel, the cable chain is usually positioned above the motor. However, because the cable chain is at a higher position, the center of gravity of the corresponding part of the entire device is raised. During high-speed movement, this can easily generate a large overturning moment, causing the cutting trajectory of the cutting device to deviate, affecting the cutting accuracy and quality, and failing to meet the requirements of high-precision cutting. Utility Model Content

[0003] The technical problem this invention aims to solve is that the cable chain has a high center of gravity, which makes it prone to generating a large overturning moment when moving at high speed, causing the cutting trajectory of the cutting device to deviate.

[0004] The solution to the technical problem of this utility model is: a cutting device, which includes a frame, a first guide rail, a crossbeam, a first driving device, a second guide rail, a second driving device, a second drag chain, and a cutting assembly. The first guide rail is disposed on the frame, the crossbeam is slidably connected to the first guide rail by a slider, the first driving device drives the crossbeam to move along the first guide rail, the second guide rail is disposed on the crossbeam and perpendicular to the first guide rail, the cutting assembly is slidably connected to the second guide rail by a slider, the second driving device drives the cutting assembly to move along the second guide rail, the top surface of the crossbeam is provided with a groove extending along the direction of the second guide rail, the second drag chain is disposed in the groove, one end of the second drag chain is fixed to the bottom of the cutting assembly, and the other end of the second drag chain is fixed to the crossbeam.

[0005] As a further improvement to the above technical solution, the first driving device includes a first motor, a first gear and a first rack. The first rack is disposed on the frame and parallel to the first guide rail. The first motor is disposed on the crossbeam. The first gear is coaxially rotatably disposed with the driving end of the first motor. The first gear and the first rack mesh with each other.

[0006] As a further improvement to the above technical solution, the second driving device includes a second motor, a second gear, and a second rack. The second rack is disposed on the crossbeam and parallel to the second guide rail. The second motor is disposed on the cutting assembly. The second gear is coaxially rotatably disposed with the driving end of the second motor. The second gear and the second rack mesh with each other.

[0007] As a further improvement to the above technical solution, the second guide rail is disposed on the top of the crossbeam, and the cutting assembly further includes a fourth guide rail, which is disposed on one side of the crossbeam and parallel to the second guide rail. The cutting assembly is slidably connected to the second guide rail and the fourth guide rail via a slider.

[0008] As a further improvement to the above technical solution, the cutting assembly includes a cutting bracket, a third guide rail, a cutting head, a third driving device, and a third drag chain. The cutting bracket is slidably connected to the second guide rail. The third guide rail is vertically arranged on the cutting bracket. The cutting head is slidably connected to the third guide rail via a slider. The third driving device drives the cutting head to move up and down along the third guide rail. The cutting head and the cutting bracket are connected via the third drag chain.

[0009] As a further improvement to the above technical solution, the center plane of the third drag chain forms an angle α with the length direction of the second guide rail, wherein α is 45°.

[0010] When the cutting head is subjected to horizontal vibration, the vibration may cause the cutting head to sway and wobble, affecting the vertical movement accuracy of the cutting head. By adopting a 45° angled layout, when the cutting head is subjected to horizontal vibration, the force generated by the vibration is decomposed along the oblique direction of the cable chain. Part of it is converted into the axial tensile force of the cable chain, rather than acting directly on the cutting head to cause a large-amplitude sway. This effectively suppresses the swaying, offset, and other instability phenomena of the cutting head caused by horizontal vibration, allowing the cutting head to maintain a more stable state during vertical movement and cutting, thereby improving cutting accuracy and processing quality.

[0011] As a further improvement to the above technical solution, the third driving device includes a third motor, a lead screw shaft, and a fixing block. The third motor is mounted on the cutting bracket, the lead screw shaft is mounted on the cutting bracket via a bearing and can rotate relative to the cutting bracket, the lead screw shaft is coaxially rotatably mounted with the output end of the third motor, the fixing block is threadedly connected to the lead screw shaft, and the cutting head is mounted on the fixing block.

[0012] As a further improvement to the above technical solution, the cutting assembly also includes a limit switch and two limit blocks. The limit switch is disposed on the cutting bracket, and the two limit blocks are respectively disposed at both ends of the crossbeam. The limit switch is electrically connected to the second motor.

[0013] As a further improvement to the above technical solution, it also includes a first dust cover and a second dust cover. The first dust cover is disposed on the frame and is used to cover the first guide rail. The second dust cover is disposed on the crossbeam and is used to cover the second guide rail.

[0014] A laser cutting machine includes the cutting apparatus as described in any of the preceding claims.

[0015] The beneficial effects of this utility model are as follows: the frame provides basic support; the crossbeam, driven by the first driving device, moves along the direction of the first guide rail through the cooperation of the slider and the first guide rail; the cutting assembly, driven by the second driving device, moves along the second guide rail to a suitable position to perform the cutting operation on the workpiece; the second drag chain protects the internal cables during the movement of the cutting assembly, and at the same time, by being placed below the groove of the crossbeam, it lowers the center of gravity of the crossbeam and improves the stability of the device. This utility model, by adopting a lower drag chain placement method, sets the second drag chain in the groove at the top of the crossbeam, lowering the overall center of gravity of the crossbeam. When the cutting assembly moves at high speed, it can effectively reduce the overturning moment, making the entire device more stable during operation, thereby ensuring cutting accuracy and improving cutting quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one embodiment of the present invention; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 yes Figure 1 Enlarged view of point B in the middle; Figure 4 This is a top view of one embodiment of the present invention.

[0017] Reference numerals in the attached drawings: 100-frame, 200-beam, 210-groove, 300-first drive unit, 310-first motor; 320-first rack; 400-first guide rail, 410-second guide rail, 420-fourth guide rail; 500-second drive unit, 510-second motor; 520-second rack; 600-second cable chain, 700-cutting assembly, 710-cutting bracket; 720-third guide rail; 730-cutting head; 740-third drive unit; 741-third motor; 742-lead screw shaft; 743-fixing block; 750-third cable chain; 760-limit switch; 770-limit block; 800-first dust cover; 810-second dust cover. Detailed Implementation

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments have been briefly explained above. Obviously, the described drawings are only a part of the embodiments of this utility model, not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0019] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connection relationships mentioned herein do not simply refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0020] Laser cutting machines are typically driven by motors, so cable chains are used to protect the motor cables. To avoid affecting the motor's travel, the cable chain is usually positioned above the motor. However, because the cable chain is at a higher position, the center of gravity of the corresponding part of the entire device is raised. During high-speed movement, this can easily generate a large overturning moment, causing the cutting trajectory of the cutting device to deviate, affecting the cutting accuracy and quality, and failing to meet the requirements of high-precision cutting.

[0021] Therefore, this utility model proposes a cutting device, referring to... Figures 1-4 The system includes a frame 100, a first guide rail 400, a crossbeam 200, a first drive device 300, a second guide rail 410, a second drive device 500, a second cable chain 600, and a cutting assembly 700. The first guide rail 400 is mounted on the frame 100. The crossbeam 200 is slidably connected to the first guide rail 400 via a slider. The first drive device 300 drives the crossbeam 200 to move along the first guide rail 400. The second guide rail 410 is mounted on the crossbeam 200 and perpendicular to the first guide rail 400. The second guide rail 400 is provided, and the cutting component 700 is slidably connected to the second guide rail 410 via a slider. The second driving device 500 drives the cutting component 700 to move along the second guide rail 410. The top surface of the crossbeam 200 is provided with a groove 210 extending along the direction of the second guide rail 410. The second drag chain 600 is disposed in the groove 210. One end of the second drag chain 600 is fixed to the bottom of the cutting component 700, and the other end of the second drag chain 600 is fixed to the crossbeam 200.

[0022] The frame 100 provides basic support; the crossbeam 200, driven by the first drive device 300, moves along the first guide rail 400 via a slider in cooperation with the first guide rail 400; the cutting assembly 700, driven by the second drive device 500, moves along the second guide rail 410 to a suitable position to perform the cutting operation on the workpiece; the second drag chain 600 protects the internal cables during the movement of the cutting assembly 700, and simultaneously lowers the center of gravity of the crossbeam 200 by being positioned below it in the groove 210 of the crossbeam 200, thus improving the stability of the device. This invention, by employing a lower-positioned drag chain, places the second drag chain 600 within the groove 210 at the top of the crossbeam 200, lowering the overall center of gravity of the crossbeam 200. This effectively reduces the overturning moment when the cutting assembly 700 moves at high speed, making the entire device more stable during operation, thereby ensuring cutting accuracy and improving cutting quality.

[0023] The first drive device 300 drives the crossbeam 200 to move linearly along the first guide rail 400, changing the position of the cutting component 700 in the X-axis direction; the second drive device 500 drives the cutting component 700 to move linearly along the second guide rail 410, adjusting its position in the Y-axis direction. The movements in the two directions cooperate to accurately position the cutting component 700 to the part of the workpiece that needs to be cut. During the movement of the cutting component 700, the second drag chain 600 will extend or retract accordingly, and the internal cables are always protected inside the drag chain. At the same time, since the drag chain is placed in the groove 210 of the crossbeam 200, it can be embedded in the groove 210 when retracted, which lowers the center of gravity of the crossbeam 200. This ensures that the overall structure remains stable when the device moves at high speed and frequently adjusts its position for cutting operations, avoiding swaying or offset caused by factors such as an excessively high center of gravity or a large overturning moment, thereby ensuring cutting accuracy and quality.

[0024] In one embodiment, the first driving device 300 includes a first motor 310, a first gear, and a first rack 320. The first rack 320 is mounted on the frame 100 and parallel to the first guide rail 400. The first motor 310 is mounted on the crossbeam 200. The first gear is coaxially rotatable with the drive end of the first motor 310, and the first gear and the first rack 320 mesh with each other. The meshing of the first gear and the first rack 320 accurately converts the rotational motion of the first motor 310 into linear motion of the crossbeam 200 along the direction of the first guide rail 400, allowing the crossbeam 200 to move precisely to the required cutting position. This ensures that the cutting assembly 700 can accurately align with the cutting point in the X-axis direction, improving cutting accuracy and quality. The overall structure is relatively compact, effectively achieving power transmission and driving functions within a limited space. The first driving device 300 can also employ other linear module structures such as a ball screw linear transmission mechanism or a linear motor type linear module.

[0025] In one embodiment, the second drive device 500 includes a second motor 510, a second gear, and a second rack 520. The second rack 520 is disposed on the crossbeam 200 and parallel to the second guide rail 410. The second motor 510 is disposed on the cutting assembly 700. The second gear is coaxially rotatable with the drive end of the second motor 510, and the second gear and the second rack 520 mesh with each other. The meshing of the second gear and the second rack 520 accurately converts the rotational motion of the second motor 510 into linear motion of the cutting assembly 700 along the direction of the second guide rail 410, allowing the cutting assembly 700 to move precisely to the required cutting position. This ensures that the cutting assembly 700 can accurately align with the cutting point in the Y-axis direction, improving cutting accuracy and quality. The overall structure is relatively compact, effectively realizing power transmission and driving functions within a limited space. The second drive device 500 can also adopt other linear module structures such as a ball screw linear transmission mechanism or a linear motor type linear module.

[0026] When the cutting assembly 700 is subjected to external forces, it is prone to instability such as shaking and swaying. Therefore, in one embodiment, the second guide rail 410 is disposed at the top of the crossbeam 200, and the cutting assembly 700 further includes a fourth guide rail 420. The fourth guide rail 420 is disposed on one side of the crossbeam 200 and parallel to the second guide rail 410. The cutting assembly 700 is slidably connected to the second guide rail 410 and the fourth guide rail 420 via a slider. The cutting assembly 700 is simultaneously slidably connected to the second guide rail 410 disposed at the top of the crossbeam 200 and the fourth guide rail 420 disposed on one side of the crossbeam 200 via a slider, so that the cutting assembly 700 can receive effective support and guidance from different directions during movement. The dual guide rails can better disperse the external forces on the cutting assembly 700, avoid instability such as shaking and deviation caused by uneven force, improve the stability of the movement of the cutting assembly 700, ensure the accuracy of the cutting trajectory, and thus improve the cutting quality.

[0027] During the movement of the cutting head 730, the cable is exposed and is prone to friction and collision with other components of the cutting assembly 700, which may lead to electrical faults such as cable sheath damage and short circuits. Therefore, in one embodiment, the cutting assembly 700 includes a cutting bracket 710, a third guide rail 720, a cutting head 730, a third drive device 740, and a third drag chain 750. The cutting bracket 710 is slidably connected to the second guide rail 410, the third guide rail 720 is vertically disposed on the cutting bracket 710, the cutting head 730 is slidably connected to the third guide rail 720 via a slider, the third drive device 740 drives the cutting head 730 to move up and down along the third guide rail 720, and the cutting head 730 is connected to the cutting bracket 710 via the third drag chain 750. The cutting head 730 is driven by the third drive device 740 to move up and down along the third guide rail 720, so that the cutting head 730 can flexibly adjust its height according to the actual thickness of the workpiece and the specific cutting position requirements, thereby enhancing the applicability and flexibility of the cutting device and improving the cutting accuracy and quality. The cutting head 730 is connected to the cutting bracket 710 by a third drag chain 750, which protects the various internal cables, prevents the cables from rubbing against or being pulled by other components, and prevents faults such as cable sheath damage and poor circuit contact.

[0028] When the cutting head 730 is subjected to horizontal vibration, the vibration may cause the cutting head 730 to oscillate or shake, affecting the vertical movement accuracy of the cutting head 730. Therefore, in one embodiment, the center plane of the third cable chain 750 forms an angle α with the length direction of the second guide rail 410, where α is 45°. By adopting a 45° angled layout, when the cutting head 730 is subjected to horizontal vibration, the force generated by the vibration is decomposed along the oblique direction of the cable chain, and part of it is converted into the axial tensile force of the cable chain, rather than directly acting on the cutting head 730 to cause a large-amplitude oscillation. This effectively suppresses the swaying, offset, and other unstable phenomena of the cutting head 730 caused by horizontal vibration, allowing the cutting head 730 to maintain a more stable state during vertical movement and cutting, thereby improving cutting accuracy and processing quality.

[0029] Different workpiece thicknesses and different cutting processes require different height positions for the cutting head 730. Therefore, in one embodiment, the third drive device 740 includes a third motor 741, a lead screw 742, and a fixing block 743. The third motor 741 is mounted on the cutting bracket 710. The lead screw 742 is mounted on the cutting bracket 710 via bearings and can rotate relative to the cutting bracket 710. The lead screw 742 is coaxially rotatable with the output end of the third motor 741. The fixing block 743 is threadedly connected to the lead screw 742, and the cutting head 730 is mounted on the fixing block 743. The lead screw 742 transmission has high transmission accuracy. Through the threaded connection between the lead screw 742 and the fixing block 743, when the lead screw 742 rotates under the drive of the third motor 741, the fixing block 743 will move linearly along the axial direction of the lead screw 742, allowing the cutting head 730 to be positioned at the required height, facilitating the cutting of workpieces of different thicknesses and performing layered cutting, etc.

[0030] During movement, the cutting assembly 700 may unexpectedly move beyond its normal travel range, potentially colliding violently with the end of the crossbeam 200 or other surrounding components. Therefore, in one embodiment, the cutting assembly 700 further includes a limit switch 760 and two limit blocks 770. The limit switch 760 is mounted on the cutting bracket 710, and the two limit blocks 770 are respectively located at both ends of the crossbeam 200. The limit switch 760 is electrically connected to the second motor 510. When the cutting assembly 700 reaches its limit position, the limit blocks 770 trigger the limit switch 760, thereby cutting off the power to the second motor 510 and immediately stopping the cutting assembly 700. This prevents the cutting assembly 700 from continuing to move and causing mechanical damage such as collisions or compression with the ends of the crossbeam 200 or other surrounding components, protecting the mechanical structural integrity of the cutting assembly 700, the crossbeam 200, and the entire cutting device. This reduces equipment maintenance costs and replacement frequency, and extends the equipment's service life.

[0031] Dust, debris, and other impurities from the outside can easily enter the first guide rail 400 and the second guide rail 410. As the crossbeam 200 and the cutting assembly 700 move, this accelerates the wear on the surfaces of the guide rails and sliders. Therefore, in one embodiment, a first dust cover 800 and a second dust cover 810 are also included. The first dust cover 800 is mounted on the frame 100 and covers the first guide rail 400. The second dust cover 810 is mounted on the crossbeam 200 and covers the second guide rail 410. The first dust cover 800 covering the first guide rail 400 and the second dust cover 810 covering the second guide rail 410 effectively prevent dust, debris, and other impurities from entering the gap between the guide rail and the slider, reducing the wear rate of the guide rail and slider caused by friction from impurities. This allows them to maintain good accuracy and performance during long-term use, extending the service life of the first guide rail 400, the second guide rail 410, and the slider and other components that cooperate with them, and reducing the frequency of equipment component replacement. Specifically, both the first dust cover 800 and the second dust cover 810 are accordion covers.

[0032] A laser cutting machine includes the cutting apparatus as described in any of the preceding claims.

[0033] By incorporating a cutting device, the guide rails and drive units work together to achieve precise positioning, resulting in high-precision cutting. The lowered drag chain lowers the overall center of gravity of the crossbeam by 200mm, effectively reducing instability caused by the equipment's structural features during cutting. During laser cutting, a stable equipment state ensures the laser beam remains focused on the accurate cutting position, preventing laser focus shift due to equipment vibration. This results in smoother, flatter cuts with a smaller heat-affected zone, improving cutting quality. This is particularly suitable for cutting thin sheet materials and workpieces requiring high surface finish.

[0034] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A cutting device, characterized in that: The device includes a frame, a first guide rail, a crossbeam, a first drive unit, a second guide rail, a second drive unit, a second cable chain, and a cutting assembly. The first guide rail is mounted on the frame. The crossbeam is slidably connected to the first guide rail via a slider. The first drive unit drives the crossbeam to move along the first guide rail. The second guide rail is mounted on the crossbeam and is perpendicular to the first guide rail. The cutting assembly is slidably connected to the second guide rail via a slider. The second drive unit drives the cutting assembly to move along the second guide rail. The top surface of the crossbeam has a groove extending along the direction of the second guide rail. The second cable chain is mounted in the groove. One end of the second cable chain is fixed to the bottom of the cutting assembly, and the other end of the second cable chain is fixed to the crossbeam.

2. The cutting device according to claim 1, characterized in that: The first driving device includes a first motor, a first gear, and a first rack. The first rack is mounted on the frame and is parallel to the first guide rail. The first motor is mounted on the crossbeam. The first gear is coaxially rotatably mounted with the driving end of the first motor. The first gear and the first rack mesh with each other.

3. The cutting device according to claim 1, characterized in that: The second driving device includes a second motor, a second gear, and a second rack. The second rack is disposed on the crossbeam and parallel to the second guide rail. The second motor is disposed on the cutting assembly. The second gear is coaxially rotatably disposed with the driving end of the second motor. The second gear and the second rack mesh with each other.

4. The cutting device according to claim 1, characterized in that: The second guide rail is disposed on the top of the crossbeam, and the cutting assembly further includes a fourth guide rail, which is disposed on one side of the crossbeam and parallel to the second guide rail. The cutting assembly is slidably connected to the second and fourth guide rails via a slider.

5. The cutting device according to claim 1, characterized in that: The cutting assembly includes a cutting bracket, a third guide rail, a cutting head, a third driving device, and a third cable chain. The cutting bracket is slidably connected to the second guide rail. The third guide rail is vertically mounted on the cutting bracket. The cutting head is slidably connected to the third guide rail via a slider. The third driving device drives the cutting head to move up and down along the third guide rail. The cutting head is connected to the cutting bracket via the third cable chain.

6. The cutting device according to claim 5, characterized in that: The center plane of the third drag chain forms an angle α with the length direction of the second guide rail, where α is 45°.

7. The cutting device according to claim 5, characterized in that: The third driving device includes a third motor, a lead screw shaft, and a fixing block. The third motor is mounted on the cutting bracket. The lead screw shaft is mounted on the cutting bracket via a bearing and can rotate relative to the cutting bracket. The lead screw shaft is coaxially rotatably mounted with the output end of the third motor. The fixing block is threadedly connected to the lead screw shaft. The cutting head is mounted on the fixing block.

8. The cutting device according to claim 5, characterized in that: The cutting assembly also includes a limit switch and two limit blocks. The limit switch is disposed on the cutting bracket, and the two limit blocks are respectively disposed at both ends of the crossbeam. The limit switch is electrically connected to the second driving device.

9. The cutting device according to claim 1, characterized in that: It also includes a first dust cover and a second dust cover. The first dust cover is disposed on the frame and is used to cover the first guide rail. The second dust cover is disposed on the crossbeam and is used to cover the second guide rail.

10. A laser cutting machine, characterized in that, Includes the cutting device as described in any one of claims 1-9.

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