Multidirectional electronic anti-collision protection device

Abstract

The invention discloses a multidirectional electronic anti-collision protection device, and relates to the technical field of cutting, welding and the like. The device comprises an electronic inductive head and a collision buffering part, when the electronic inductive head is in collision contact with a workpiece, a closed loop is formed, current is generated, the current is output to a control system through a conversion signal, the system gives an alarm, equipment is stopped and no contact exists, the electronic inductive head monitors in real time, and when the distance of the workpiece is too close and the change exceeds a threshold value, the system gives an alarm, and the equipment is stopped immediately. Therefore, collision accidents are prevented; the collision buffering part comprises an upper mounting plate, a buffering spring, a lower connecting plate and the like, the lower connecting plate is connected with the electronic inductive head, the buffering spring is arranged between the lower connecting plate and the upper mounting plate, and the collision buffering part and the electronic inductive head are fixed to the lower section of the laser head through bolts and completely surround the laser head. A gap is reserved between the electronic inductive head and the laser head, a buffering stage is added, the reaction time of a control system is prolonged in the stage, and impact force is buffered through swinging or compression of a buffering spring so as to protect the laser head.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting and welding, and in particular to a multi-directional electronic anti-collision protection device. Technical Background

[0002] Laser cutting is a high-precision and high-efficiency metal cutting technology that is now widely used in metal processing, manufacturing, automotive industry and other fields. Its principle is to use auxiliary gas and laser cutting technology to focus a high-energy density laser beam on the surface of the workpiece to melt or vaporize it. At the same time, the molten material is blown away by a high-speed airflow coaxial with the beam to complete the cutting process of the workpiece.

[0003] During the laser cutting process, especially when the laser head is moving at high speed, if the edge of the workpiece is severely warped or the residue is hard, the laser head is prone to colliding with the plate on the machine tool. Alternatively, after cutting is completed, the plate may bounce due to stress within the plate, or the edge may bulge due to the part getting stuck in the machine tool grid. This can easily lead to collision accidents. Existing laser heads and machine tools are often installed with a rigid connection, which cannot effectively cushion the damage caused by the impact in the event of a collision, causing injury or even damage to the laser head. This also affects the laser head's processing accuracy. As the core component of laser equipment, the laser head is expensive to repair and replace, significantly increasing the company's costs and delaying the production cycle.

[0004] In order to solve the existing problems in the industry, the present invention proposes a multi-directional electronic anti-collision protection device for protecting the laser head, which aims to solve the problem that the laser head is easily injured or damaged after encountering a collision accident. Summary of the Invention

[0005] The present invention aims to solve the problem that the laser head in the current laser cutting industry is easily injured or damaged after encountering a collision accident, and thus proposes a multi-directional electronic anti-collision protection device.

[0006] To solve the pain points in the above industries, the present invention uses the following technical solutions:

[0007] A multi-directional electronic anti-collision protection device includes: an electronic sensing head and a collision buffer component, wherein the collision buffer component includes an upper mounting plate, a buffer spring and a lower connecting plate, etc. The electronic sensing head is mounted on the lower connecting plate, and a spring fixing part is mounted on the lower connecting plate, and a buffer spring is mounted on the spring fixing part. The other end of the buffer spring is also mounted on the spring fixing part and connected to the upper mounting plate. The upper mounting plate is provided with a threaded hole through the side cylindrical surface, and is fixed to the lower section of the laser head by fixing bolts and fully surrounds it; the electronic sensing head is connected to the input end of the signal conversion board, the signal conversion board is connected to the external power supply, and the GND end of the external power supply is connected to the frame, and the collision buffer component is installed with a dust cover, the upper and lower ends of the dust cover are respectively fixed on the outer cylindrical surfaces of the upper mounting plate and the lower connecting plate, and the spring fixing part, the buffer spring and other components are completely surrounded inside the dust cover to prevent smoke and dust generated when the laser equipment is working from entering.

[0008] As a preferred embodiment of the present invention, the upper mounting plate and the lower connecting plate are provided with countersunk holes, the bottom of the spring fixing piece is sunk into the inside of the two and is fixed by bolts.

[0009] As a preferred embodiment of the present invention, the lower connecting plate is made of insulating material to prevent the electronic induction head from being connected to other parts.

[0010] As a preferred embodiment of the present invention, the electronic sensing head is made of brass, which has good electrical conductivity and makes its capacitive sensing more accurate.

[0011] As a preferred embodiment of the present invention, the electronic sensing head is connected to the signal conversion board via a wire, and converts the capacitance and current signals generated by the electronic sensing head into high-level or low-level signals, which are then output to the control system of the laser device.

[0012] As a preferred embodiment of the present invention: when the electronic sensing head contacts and collides with the workpiece, a closed loop is formed between the electronic sensing head, the workpiece, the frame, the signal conversion board and the external power supply, and the signal is converted into a high-level or low-level signal through the signal conversion board and output to the control system of the laser equipment.

[0013] As a preferred embodiment of the present invention, the bottom of the electronic sensing head is provided with an inclined surface, which extends upward, so as to be able to sense impacts from multiple directions such as the side and obliquely below.

[0014] As a preferred embodiment of the present invention, the inner hole of the electronic sensing head is much larger than the outer diameter of the lower section of the laser head, thereby increasing a buffer stage, thereby increasing the reaction time of the control system when encountering a sudden collision accident that cannot be avoided in time, and at the same time, increasing the swing distance of the buffer spring, so that the impact force can be buffered by the swing of the buffer spring.

[0015] As a preferred embodiment of the present invention, four groups of threaded holes evenly distributed around the circumference are provided on the outer cylindrical surface of the frustum at the upper end of the upper mounting plate for installing fixing bolts. By adjusting the depth of the four groups of fixing bolts, the lower section of the laser head is ensured to be in the center position of the inner hole of the electronic sensing head, so that it has sufficient buffer distance when facing impacts from any direction.

[0016] As a preferred embodiment of the present invention, the dust cover is made of textile fabric, a middle section of which is provided with wavy redundancy so that it can swing, compress and stretch along with the collision buffer component.

[0017] The beneficial effects of the present invention are:

[0018] Simple structure and easy installation: The multi-directional electronic anti-collision protection device is mainly composed of a small number of parts such as the electronic sensing head and the collision buffer component. After the two parts are assembled, they can be installed as a whole on the laser head through the fixing bolts. There is no need to disassemble and change the position of the laser head to prevent affecting its processing accuracy.

[0019] Real-time sensing and quick response: When the electronic sensing head collides with the workpiece, a closed loop is formed, current is generated, and the converted signal is output to the control system. The system alarms and the equipment shuts down. When there is no contact, real-time monitoring is performed through capacitance. The lower end of the electronic sensing head is provided with a large upward extending inclined surface, which has a large sensing range. Its capacitance signal is converted into a high-level or low-level signal after passing through the signal conversion board and sent to the control system of the laser equipment. When the signal change exceeds the threshold, the equipment stops immediately, which can effectively prevent the occurrence of collision accidents.

[0020] 360° multi-directional collision protection: By adjusting the depth of the fixing bolts, the lower section of the laser head is kept in the center of the inner hole of the electronic sensor head. The inner hole of the electronic sensor head is also much larger than the outer diameter of the lower section of the laser head. At the same time, four groups of buffer springs are evenly distributed between the upper mounting plate and the lower connecting plate. In the event of a collision accident in any direction, there is enough clearance for the buffer springs to swing or compress to cushion the impact force. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall assembly three-dimensional structure of the multi-directional electronic anti-collision protection device of the present invention;

[0022] Figure 2 This is a front view of the overall assembly of the multi-directional electronic anti-collision protection device of the present invention and a schematic diagram of the sensing circuit;

[0023] Figure 3 FIG1 is a front cross-sectional schematic diagram A of the multi-directional electronic anti-collision protection device of the present invention;

[0024] Figure 4 A top view of a partially assembled multi-directional electronic anti-collision protection device of the present invention;

[0025] Figure 5 FIG. B is a schematic diagram B of a quarter three-dimensional cross-section of the multi-directional electronic anti-collision protection device of the present invention;

[0026] Figure 6 A schematic diagram of a signal conversion board component of the multi-directional electronic anti-collision protection device of the present invention;

[0027] Figure 7 A distance sensing diagram for the invented multi-directional electronic anti-collision protection device;

[0028] Figure 8 Schematic diagram of multi-directional impact for the invented multi-directional electronic anti-collision protection device.

[0029] In the figure: 1-upper mounting plate, 2-lower connecting plate, 3-electronic sensing head, 4-spring fixing part, 5-buffer spring, 6-dust cover, 7-laser head, 8-fastening bolt, 9-signal conversion board, 10-workpiece, 11-frame. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be further described in detail below in conjunction with specific implementation methods.

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] Multi-directional electronic anti-collision protection device, such as Figures 1 to 8 As shown, it includes: an electronic sensing head-3 and a collision buffer component, wherein the collision buffer component includes an upper mounting plate-1, a buffer spring-5 and a lower connecting plate-2, etc. The electronic sensing head-3 is installed on the lower connecting plate-2, and a spring fixing part-4 is installed on the lower connecting plate-2, and a buffer spring-5 is installed on the spring fixing part-4. The other end of the buffer spring-5 is also installed on the spring fixing part-4 and connected to the upper mounting plate-1.

[0033] The electronic sensing head-3 is made of brass, and its good conductivity makes its capacitive sensing more accurate. The bottom of the electronic sensing head-3 is provided with an inclined surface, which extends upward so that it can sense possible impact factors from the side or obliquely below. The electronic sensing head-3 is connected to the input end of the signal conversion board-9, and the signal conversion board-9 is connected to the external power supply. The GND end of the external power supply is connected to the frame-11. The signal conversion board-9 converts the capacitance and current signals it generates into high-level or low-level signals, and then outputs them to the control system of the laser equipment. The control system detects signal changes in real time. When the change exceeds the threshold, the equipment immediately shuts down to prevent collision accidents.

[0034] The inner hole of the electronic sensor head-3 is much larger than the outer diameter of the lower section of the laser head-7, so that when encountering a sudden collision accident that cannot be avoided in time, the electronic sensor head-3 collides with the workpiece-10, forming a closed loop between the electronic sensor head-3, the workpiece-10, the frame-11, the signal conversion board-9 and the external power supply, generating current and converting it into a high-level or low-level signal through the signal conversion board-9 and outputting it to the control system of the laser equipment. The distance between them forms a buffer section, which increases the response time of the control system. The control system alarms, causing the electronic sensor head-3 to stop before colliding with the laser head-7, or using the buffer spring-5 to swing and buffer the damage to the laser head-7 caused by the collision, thereby protecting the laser head-7; the bottom end face of the electronic sensor head-3 should be flush with or slightly higher than the upper end face of the nozzle of the laser head-7, so that the laser equipment does not affect the replacement of the nozzle when switching the working scene.

[0035] The upper mounting plate-1 and the lower connecting plate-2 are provided with countersunk holes, and the bottom of the spring fixing part-4 is sunk into the inside of the two and fixed by bolts to prevent the buffer spring-5 from moving during the operation of the laser equipment; the lower connecting plate-2 is made of insulating material to prevent the current of the electronic sensing head-3 from being connected to other parts, and four groups of threaded holes are provided on the outer cylindrical surface of the frustum at the upper end of the upper mounting plate-1. It is fixed to the lower section of the laser head-7 by fixing bolts-8 and fully surrounds it. By adjusting the depth of the four groups of fixing bolts-8 to ensure that the lower section of the laser head-7 is in the center position of the inner hole of the electronic sensing head-3, it has sufficient buffer distance when facing impacts from any direction.

[0036] The collision buffer component is equipped with a dust cover-6, which is made of textile fabric and has a wavy redundancy in the middle section so that it can swing, compress and stretch along with the collision buffer component; the upper and lower ends of the dust cover-6 are respectively fixed to the outer cylindrical surfaces of the upper mounting plate-1 and the lower connecting plate-2 using clamps, and the spring fixing part-4, the buffer spring-5 and other components are completely enclosed in the dust cover-6 to prevent dust generated by the laser equipment during operation from entering.

[0037] Working principle:

[0038] When the laser equipment is operating normally, the distance between the electronic sensing head-3 and the workpiece changes continuously as the position of the laser head-7 changes. The electronic sensing head-3 is connected to the input end of the signal conversion board-9, and the signal conversion board-9 is connected to the external power supply and the frame-11. A capacitor is formed between the electronic sensing head-3 and the workpiece-10. When the distance between the two exceeds the sensing distance, the size of the formed capacitor will also begin to change, and this change will be converted into a high-level or low-level signal through the signal conversion board-9 and output to the control system of the laser equipment. Therefore, when the distance between the electronic sensing head-3 and the workpiece exceeds the limit, that is, the capacitance signal exceeds the threshold, the control system alarms and the equipment stops running immediately to prevent a collision accident.

[0039] And because the electronic sensing head-3 is much larger than the laser head-7 and has an upward extending slope at the bottom, the electronic sensing head-3 can sense the ups and downs, protrusions, and warped edges of the workpiece in advance, and enable the control system to react in advance to evade or alarm to avoid collision.

[0040] However, when the cutting is completed and encounters a sudden collision accident that is difficult to avoid, such as the bounce caused by the stress release in the workpiece or the collision of the laser head-7 at high speed, the control system will not have time to react and avoid it, and a collision accident is very likely to occur, causing the workpiece-10 to hit the electronic sensing head-3. A closed loop is formed between the electronic sensing head-3, the workpiece-10, the frame-11, the signal conversion board-9 and the external power supply, generating current and converting it into a high-level or low-level signal through the signal conversion board-9 and outputting it to the control system of the laser equipment. The control system alarms and the laser equipment stops running immediately. Moreover, the inner hole of the electronic sensing head-3 is much larger than the size of the lower section of the laser head-7, and the frustum installed on the upper end of the upper mounting plate-1 is adjusted. The depth of the four sets of fixing bolts-8 on the outer cylindrical surface makes the lower section of the laser head-7 located at the center of the inner hole of the electronic sensor head-3, so that the electronic sensor head-3 can swing inward in any direction and drive the buffer spring-5 to swing through the lower connecting plate-2 and the spring fixing member-4 fixed thereon. The swing in the gap also increases the reaction time of the control system, which can stop the machine before the impact acts on the laser head-7, or buffer the impact force; if the impact comes from below, the buffer spring-5 is directly compressed, and the impact on the laser head-7 is buffered by the swing and compression of the buffer spring-5; after eliminating the impact factor, the four sets of buffer springs-5 drive the electronic sensor head-3 to return to its original position, and the alarm is lifted.

[0041] Example 1

[0042] like Figure 7As shown, during the operation of the laser equipment, the position of the laser head-7 of the multi-directional electronic anti-collision protection device is constantly changing, and the electronic sensing head-3 continuously senses and detects whether the workpiece has undulations, protrusions, warping, and other factors that may easily lead to collision accidents, so that the control system can react in advance to avoid or alarm; when the distance L between the electronic sensing head-3 and the workpiece exceeds the detection distance, the change in distance L will cause the capacitance to change, and it will be converted into a high-level or low-level signal through the signal conversion board-9 and output to the control system of the laser equipment. When an abnormal object appears around the electronic sensing head-3 and causes the distance L to change beyond the threshold, the control system will alarm and the equipment will stop running immediately to prevent a collision accident.

[0043] Example 2

[0044] like Figure 8 As shown, when encountering an unavoidable sudden impact accident such as a bounce caused by stress release within the workpiece 10 or a collision with the laser head 7 at high speed, the workpiece 10 can collide with the electronic sensor head 3 from the front, back, left, or right directions. A closed circuit is formed between the electronic sensor head 3, the workpiece 10, the frame 11, the signal conversion board 9, and the external power supply. Current is generated and converted into a high-level or low-level signal by the signal conversion board 9 and output to the control system of the laser device. The control system alarms and the laser device immediately stops operation. The impact causes the electronic sensor head 3 to swing the buffer spring 5 inward. At the same time, the increased swing clearance also increases the control system's response time, allowing the device to stop before the impact affects the laser head 7 or to buffer the impact damage to the laser head 7. When the impact comes from below, the electronic sensor head 3 pushes upward, causing the lower connecting plate 2 to compress the buffer spring 5 upward, thereby buffering the impact damage to the laser head 7. At the same time, the control system alarms and the device immediately stops operation. After the impact is eliminated, the four sets of buffer springs 5 drive the electronic sensor head 3 to return to its original position, and the alarm is lifted.

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. Multi-directional electronic anti-collision protection device, characterized in that: include: An electronic induction head (3) and a collision buffer component, wherein the collision buffer component comprises an upper mounting plate (1), a buffer spring (5) and a lower connecting plate (2), etc. The electronic induction head (3) is mounted on the lower connecting plate (2), a spring fixing member (4) is mounted on the lower connecting plate (2), a buffer spring (5) is mounted on the spring fixing member (4), the other end of the buffer spring (5) is also mounted on the spring fixing member (4) and connected to the upper mounting plate (1), the upper mounting plate (1) is provided with a threaded hole through the side cylindrical surface, and is fixed by a fixing bolt (8). The electronic sensor head (3) is connected to the input end of the signal conversion board (9), the signal conversion board (9) is connected to the external power supply, and the GND end of the external power supply is connected to the frame (11). The collision buffer component is installed with a dust cover (6), the upper end and the lower end of the dust cover (6) are respectively fixed on the outer cylindrical surface of the upper mounting plate (1) and the lower connecting plate (2), and the spring fixing member (4) and the buffer spring (5) and other components are completely surrounded in the dust cover (6) to prevent smoke and dust generated when the laser equipment is working from entering.

2. The multi-directional electronic anti-collision protection device according to claim 1, characterized in that: The upper mounting plate (1) and the lower connecting plate (2) are provided with countersunk holes, and the bottom of the spring fixing member (4) is sunk into the inside of the two and fixed by bolts.

3. The multi-directional electronic anti-collision protection device according to claim 1, characterized in that: The lower connecting plate (2) is made of insulating material to prevent the electronic induction head (3) from being connected to other parts.

4. The multi-directional electronic anti-collision protection device according to claim 1, characterized in that: The electronic sensing head (3) is made of brass, and has good electrical conductivity, making its capacitive sensing more accurate.

5. The multi-directional electronic anti-collision protection device according to claim 1, characterized in that: The electronic induction head (3) is connected to a signal conversion board (9) via a wire, and converts the capacitance and current signals generated by the electronic induction head (3) into high-level or low-level signals, which are then output to the control system of the laser device.

6. The multi-directional electronic anti-collision protection device according to claim 1, characterized in that: When the electronic sensing head (3) contacts and collides with the workpiece (10), a closed loop is formed between the electronic sensing head (3), the workpiece (10), the frame (11), the signal conversion board (9) and the external power supply, generating a current which is converted into a high-level or low-level signal through the signal conversion board (9) and output to the control system of the laser device.

7. The multi-directional electronic anti-collision protection device according to claim 1, characterized in that: The bottom of the electronic sensing head (3) is provided with an inclined surface, which extends upwards so as to be able to sense impacts from multiple directions such as the side and obliquely downward.

8. The multi-directional electronic anti-collision protection device according to claim 1, characterized in that: The inner hole of the electronic induction head (3) is much larger than the outer diameter of the lower section of the laser head (7), thereby increasing a buffer stage, thereby increasing the reaction time of the control system when encountering a sudden collision accident that cannot be avoided in time, and at the same time, increasing the swing distance of the buffer spring (5), so that the impact force can be buffered by the swing of the buffer spring (5).

9. The multi-directional electronic anti-collision protection device according to claim 8, characterized in that: The outer cylindrical surface of the upper end of the upper mounting plate (1) is provided with four groups of threaded holes evenly distributed around the circumference for installing fixing bolts (8). By adjusting the depth of the four groups of fixing bolts (8), the lower section of the laser head (7) is ensured to be in the center position of the inner hole of the electronic sensor head (3), so that it has sufficient buffer distance when facing impacts from any direction.

10. The multi-directional electronic anti-collision protection device according to claim 1, characterized in that: The dust cover (6) is made of textile fabric, and a middle section thereof is provided with wave-shaped redundancy so that the dust cover (6) can swing, compress and stretch along with the collision buffer component.

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