Laser cutting head anti-collision structure and laser cutting equipment

Abstract

The utility model belongs to the technical field of laser cutting, and particularly relates to a laser cutting head anti-collision structure and laser cutting equipment, the laser cutting head anti-collision structure comprises a collision sensor, a connecting rod and a trigger ring, the collision sensor is arranged on the side face of a laser cutting head and is in communication connection with a controller used for controlling the laser cutting head to move; one end of the connecting rod is connected with a trigger part of the collision sensor, the other end of the connecting rod is connected with the trigger ring, the trigger ring sleeves the lower end of the laser cutting head and is spaced from the lower end of the laser cutting head, and the position of the trigger ring is not higher than the capacitive sensor at the lower end of the laser cutting head and not lower than the bottom of a ceramic ring of the laser cutting head. According to the laser cutting head, the situation that the capacitive sensor and the precise optical lens are damaged due to collision of the laser cutting head can be avoided, maintenance of the laser cutting head is reduced, economic losses are reduced, the reliability and efficiency of laser cutting operation are improved, the anti-collision structure is simple, the cost is lower, and the reliability is higher after long-time use.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser cutting, and in particular relates to a laser cutting head anti-collision structure and laser cutting equipment. Background Art

[0002] Laser cutting uses a focused, high-power density laser beam to irradiate a workpiece, causing the irradiated material to rapidly melt, vaporize, ablate, or reach its ignition point. Simultaneously, a high-speed airflow coaxial with the beam is used to blow away the molten material, thereby achieving the cut of the workpiece. In order to effectively control the vertical relative position between the laser cutting head and the workpiece to be cut, a capacitive sensor for sensing height distance is generally located above the ceramic ring at the lower end of the laser cutting head. This sensor is used to detect the distance between the bottom of the laser cutting head and the workpiece to be cut, and then feeds back to the control system to adjust the height of the laser cutting head. However, when the surface of the workpiece to be cut is irregular or has warping, if the warping height is lower than the capacitive sensor at the lower end of the laser cutting head, the control system can normally adjust the height of the laser cutting head to avoid it through detection and feedback from the capacitive sensor. If the warping height exceeds the capacitive sensor, the capacitive sensor may not trigger detection, but the lower side of the laser cutting head may collide with the warping area, causing damage to the capacitive sensor and the precision optical lens on the laser cutting head. This requires the operation to be suspended for repair and replacement, which not only results in economic losses but also affects the normal progress and efficiency of the laser cutting operation. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a laser cutting head anti-collision structure and laser cutting equipment that can realize anti-collision during operation of the laser cutting head, which can be installed on the existing laser cutting head of the production line without changing the original structure of the laser cutting head, and has a simple structure, low cost and high reliability.

[0004] The content of the utility model provides a laser cutting head anti-collision structure, including a collision sensor, a connecting rod and a trigger ring. The collision sensor is arranged on the side of the laser cutting head and is communicatively connected to a controller for controlling the movement of the laser cutting head. One end of the connecting rod is connected to the trigger part of the collision sensor, and the other end is connected to the trigger ring. The trigger ring is sleeved on the lower end of the laser cutting head and spaced apart from the lower end of the laser cutting head. The position of the trigger ring is not higher than the capacitive sensor at the lower end of the laser cutting head, and is not lower than the bottom of the ceramic ring of the laser cutting head.

[0005] Furthermore, there are two connecting rods, and ends of the two connecting rods facing away from the collision sensor are both connected to the trigger ring, and the connection points between the two connecting rods and the trigger ring are symmetrically arranged along the axis of the trigger ring.

[0006] Furthermore, there are two collision sensors, both of which are arranged on the side of the laser cutting head and are communicatively connected to the controller for controlling the movement of the laser cutting head. The two connecting rods are correspondingly connected to the trigger parts of the two collision sensors.

[0007] Furthermore, a connecting block is provided on the triggering portion of the collision sensor, and one end of the connecting rod is connected to the connecting block via a bolt.

[0008] Furthermore, the connecting rod and the trigger ring are both hollow.

[0009] Furthermore, the connecting rod is a telescopic structure.

[0010] Furthermore, the connecting rod includes an outer rod and an inner rod, the inner rod is inserted into the outer rod, and a locking piece for fixing the position of the inner rod is provided on the side of the outer rod.

[0011] Furthermore, one end of the outer rod away from the inner rod is connected to the trigger part of the collision sensor, and one end of the inner rod away from the outer rod is connected to the trigger ring. The locking member is a second bolt, which fixes the position of the inner rod by abutting against the inner rod.

[0012] Furthermore, the connecting rod and the trigger ring are made of stainless steel.

[0013] The present invention further provides a laser cutting device provided with the laser cutting head anti-collision structure as described above.

[0014] The beneficial effect of the present invention is that when the surface flatness of the workpiece to be cut is poor or warping occurs and the capacitive sensor does not detect it, the trigger ring will first collide with the protrusion or warping position, and the trigger part of the collision sensor detects the collision force through the connecting rod, and transmits the corresponding signal to the controller. The controller drives the laser cutting head to stop moving, avoiding the situation where the laser cutting head collides and causes damage to the capacitive sensor and the precision optical lens, reducing the maintenance of the laser cutting head, reducing economic losses, and improving the reliability and efficiency of the laser cutting operation. Moreover, the anti-collision structure can be installed on the existing laser cutting head of the production line without changing the original structure of the laser cutting head, and can be better applied to the production line that needs to further increase the anti-collision function of the laser cutting head. Compared with replacing the laser cutting head with its own anti-collision structure on the production line, the anti-collision structure of the present invention is simple and has lower cost.

[0015] Due to the shape of the trigger ring and its relative position to the lower end of the laser cutting head, it is possible to achieve full-scale collision triggering on the side of the lower end of the laser cutting head without affecting the normal operation of the laser cutting head. A safe clearance is left between the trigger ring and the lower end of the laser cutting head to prevent the trigger ring from shaking or tilting due to impact and striking the laser cutting head. The structural form of connecting the collision sensor and the trigger ring with a connecting rod allows the collision sensor, an electronic device, to be positioned higher, minimizing the risk of decreased detection sensitivity or failure caused by the high temperature generated by the laser cutting operation, thereby ensuring the reliability of the collision sensor under long-term use, and thus ensuring the higher reliability of the anti-collision structure under long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the anti-collision structure of the laser cutting head of the utility model.

[0017] Figure 2 This is a side view of the first embodiment of the anti-collision structure of the laser cutting head of the present invention.

[0018] Figure 3 This is a side view of the second embodiment of the anti-collision structure of the laser cutting head of the present invention.

[0019] Figure 4 This is a schematic diagram of the utility model in which the connecting rod is a telescopic structure.

[0020] Figure 5 This is a schematic diagram of the trigger ring of the present invention.

[0021] In the figure: 1. collision sensor; 2. connecting rod; 21. outer rod; 22. inner rod; 23. bolt 2; 3. trigger ring; 4. connecting block; 5. bolt 1; 100. laser cutting head. DETAILED DESCRIPTION

[0022] like Figure 1-Figure 5As shown, the utility model provides a laser cutting head anti-collision structure, including a collision sensor 1, a connecting rod 2 and a trigger ring 3. The collision sensor 1 is arranged on the laser cutting head 100 or on the mounting base of the laser cutting head 100 and is located on the side of the laser cutting head 100. The collision sensor 1 moves with the laser cutting head 100 and is communicatively connected to the controller used to control the movement of the laser cutting head 100. The communication connection can be a wireless connection or a wired connection to achieve signal transmission between the collision sensor 1 and the controller of the laser cutting head 100. One end of the connecting rod 2 is connected to the trigger part of the collision sensor 1, and the other end is connected to the trigger ring 3. The trigger ring 3 is sleeved on the lower end of the laser cutting head 100 and spaced apart from the lower end of the laser cutting head 100, that is, there is a certain space between the inner side of the trigger ring 3 and the side surface of the lower end of the laser cutting head 100, and the position of the trigger ring 3 is not higher than the capacitive sensor at the lower end of the laser cutting head 100, and is not lower than the bottom of the ceramic ring at the lower end of the laser cutting head 100, wherein the capacitive sensor is a sensor that detects the distance between the lower end of the laser cutting head 100 and the workpiece to be cut downward, and feeds back to the control system to adjust the height of the laser cutting head 100. Specifically, it is a prior art, and it is located above the ceramic ring at the lower end of the laser cutting head 100.

[0023] Based on the above settings, when the laser cutting head 100 moves to perform laser cutting operations, its original capacitive sensor detects the distance between the bottom of the laser cutting head 100 and the workpiece to be cut in real time, and feeds back to the aforementioned controller to adjust the movement of the laser cutting head 100. When the surface flatness of the workpiece to be cut is poor or warping occurs and the capacitive sensor does not detect it, the trigger ring 3 will first collide with the protrusion or warping position. The trigger part of the collision sensor 1 detects the collision force through the connecting rod 2 and transmits a corresponding signal to the controller. The controller drives the laser cutting head 100 to stop moving, avoiding the situation where the laser cutting head 100 is hit and causes damage to the capacitive sensor and the precision optical lens, reducing the maintenance of the laser cutting head 100, reducing economic losses, and improving the reliability and efficiency of the laser cutting operation. Moreover, the anti-collision structure can be installed on the existing laser cutting head 100 on the production line without changing the original structure of the laser cutting head 100. It can be better applied to the production line that needs to further increase the anti-collision function of the laser cutting head 100. Compared with replacing the laser cutting head 100 with an anti-collision structure on the production line, the anti-collision structure of the utility model is simple and has lower cost.

[0024] Based on the shape of the trigger ring 3 and its relative position to the lower end of the laser cutting head 100, it is possible to achieve all-round collision triggering on the side of the lower end of the laser cutting head 100 without affecting the normal operation of the laser cutting head 100, and to leave a safe avoidance distance between the trigger ring 3 and the lower end of the laser cutting head 100 to prevent the trigger ring 3 from shaking or tilting due to impact and hitting the laser cutting head 100. The structural form of connecting the collision sensor 1 and the trigger ring 3 through the connecting rod 2 allows the position of the collision sensor 1, which is an electronic device, to be set higher, minimizing the decrease in detection sensitivity or failure caused by the high temperature generated by the laser cutting operation, thereby ensuring the reliability of the collision sensor 1 under long-term use, and further ensuring that the anti-collision structure is more reliable under long-term use.

[0025] The collision sensor 1 can be selected according to the on-site conditions. For example, in one embodiment, the ATI robot collision sensor SR-176 is selected, which has high precision and sensitivity. In other embodiments, other types of collision sensors can also be selected.

[0026] The shape of the connecting rod 2 can be as follows Figure 2 or Figure 3 As shown, the connection rods 2 are selected according to actual needs. There are two connecting rods 2, and the ends of the two connecting rods 2 facing away from the collision sensor 1 are connected to the trigger ring 3. The connection points between the two connecting rods 2 and the trigger ring 3 are symmetrically arranged along the axis of the trigger ring 3 to improve the balance and stability of the connection to the trigger ring 3.

[0027] It is further preferred that there are two collision sensors 1, both of which are arranged on the side of the laser cutting head 100 and are communicatively connected to the controller for controlling the movement of the laser cutting head 100, and the two connecting rods 2 are correspondingly connected to the trigger parts of the two collision sensors 1.

[0028] The trigger portion of the collision sensor 1 is provided with a connecting block 4, and one end of the connecting rod 2 is connected to the connecting block 4 via a bolt 5. This arrangement facilitates the installation of the connecting rod 2 and ensures its secure connection. Furthermore, as the connecting rod 2 is an integral structure, it is easily disassembled and replaced. If the trigger ring 3 or the connecting rod 2 is deformed due to a collision, the connecting rod 2 and trigger ring 3 can be removed and replaced as a whole.

[0029] The connecting rod 2 and the trigger ring 3 are both hollow, that is, the connecting rod 2 and the trigger ring 3 are both hollow tube structures. This setting method is lighter and has lower cost while effectively realizing the collision detection trigger function, and will not excessively increase the load on the laser cutting head 100 when it moves.

[0030] In one embodiment of the present invention, the connecting rod 2 is a retractable structure, and the height position of the trigger ring 3 can be adjusted by adjusting the length of the connecting rod 2, which is more flexible and can meet the use requirements of different models of laser cutting heads 100 or meet the use requirements of different detection triggering requirements of the production line.

[0031] Specifically, the connecting rod 2 includes an outer rod 21 and an inner rod 22. The inner rod 22 is inserted into the outer rod 21. A locking piece for fixing the position of the inner rod 22 is provided on the side of the outer rod 21. The inner rod 22 is moved axially to change the overall length of the connecting rod 2, and then the position of the inner rod 22 is fixed by the locking piece.

[0032] The end of the outer rod 21 facing away from the inner rod 22 is connected to the trigger portion of the collision sensor 1, and the end of the inner rod 22 facing away from the outer rod 21 is connected to the trigger ring 3. In one embodiment of the present invention, the locking member is a spring steel ball, which is fixed by abutting against the inner rod 22. In another embodiment of the present invention, the locking member is a second bolt 23, the end of which abuts against the inner rod 22 to fix the position of the inner rod 22. By loosening the second bolt 23, the inner rod 22 can be moved axially. This arrangement allows the overall length of the connecting rod 2 to be adjusted, and the inner rod 22 can also be directly removed to replace the trigger ring 3 after the trigger ring 3 is deformed and damaged by a collision. After the position is adjusted or replaced, the inner rod 22 is fixed by tightening the second bolt 23 to ensure stability after fixation.

[0033] The connecting rod 2 and the trigger ring 3 are made of stainless steel, which has good temperature resistance and corrosion resistance, and has high strength and hardness, effectively meeting the application requirements of the laser cutting working environment.

[0034] The present invention also provides a laser cutting device in which the laser cutting head is provided with the aforementioned anti-collision structure. This prevents the laser cutting head 100 from being damaged by collisions that could damage the capacitive sensor and precision optical lenses, reduces maintenance of the laser cutting head 100, reduces economic losses, improves the reliability and efficiency of the laser cutting operation, and ensures anti-collision reliability over long periods of use.

[0035] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0036] The one or more embodiments of this application are intended to encompass all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this application should be included in the scope of protection of this application.

Claims

1. A laser cutting head anti-collision structure, characterized in that: The invention comprises a collision sensor (1), a connecting rod (2) and a trigger ring (3), wherein the collision sensor (1) is arranged on the side of the laser cutting head (100) and is communicatively connected to a controller for controlling the movement of the laser cutting head (100), one end of the connecting rod (2) is connected to the trigger portion of the collision sensor (1), and the other end is connected to the trigger ring (3), the trigger ring (3) is sleeved on the lower end of the laser cutting head (100) and is spaced apart from the lower end of the laser cutting head (100), and the position of the trigger ring (3) is not higher than the capacitive sensor at the lower end of the laser cutting head (100) and is not lower than the bottom of the ceramic ring of the laser cutting head (100).

2. The anti-collision structure for a laser cutting head according to claim 1, characterized in that: There are two connecting rods (2), and one end of each of the two connecting rods (2) facing away from the collision sensor (1) is connected to the trigger ring (3), and the connection points between the two connecting rods (2) and the trigger ring (3) are symmetrically arranged along the axis of the trigger ring (3).

3. The laser cutting head anti-collision structure according to claim 2, characterized in that: There are two collision sensors (1), both of which are arranged on the side of the laser cutting head (100) and are communicatively connected to a controller for controlling the movement of the laser cutting head (100), and the two connecting rods (2) are correspondingly connected to the triggering parts of the two collision sensors (1).

4. The anti-collision structure for a laser cutting head according to any one of claims 1 to 3, characterized in that: A connecting block (4) is provided on the triggering portion of the collision sensor (1), and one end of the connecting rod (2) is connected to the connecting block (4) via a bolt (5).

5. The anti-collision structure for a laser cutting head according to any one of claims 1 to 3, characterized in that: The connecting rod (2) and the trigger ring (3) are both hollow.

6. The anti-collision structure for a laser cutting head according to claim 5, characterized in that: The connecting rod (2) is a telescopic structure.

7. The anti-collision structure for a laser cutting head according to claim 6, characterized in that: The connecting rod (2) comprises an outer rod (21) and an inner rod (22), wherein the inner rod (22) is inserted into the outer rod (21), and a locking member for fixing the position of the inner rod (22) is provided on the side of the outer rod (21).

8. The anti-collision structure for a laser cutting head according to claim 7, characterized in that: One end of the outer rod (21) facing away from the inner rod (22) is connected to the trigger portion of the collision sensor (1), and one end of the inner rod (22) facing away from the outer rod (21) is connected to the trigger ring (3). The locking member is a second bolt (23) that abuts against the inner rod (22) to fix the position of the inner rod (22).

9. The anti-collision structure for a laser cutting head according to any one of claims 1-3 and 6-8, characterized in that: The connecting rod (2) and the trigger ring (3) are made of stainless steel.

10. A laser cutting device, characterized in that: A laser cutting head anti-collision structure as described in any one of claims 1 to 9 is provided.

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