A laser cutting head and laser cutting equipment

Abstract

This utility model relates to a laser cutting head and a laser cutting device. The laser cutting head has an axially extending optical path aperture for laser light to pass through, and the laser cutting head is movable along the laser optical path direction. The laser cutting head includes a height sensor, an electrical connection assembly, and a converter circuit board electrically connected to a main control board. The height sensor is electrically connected to the converter circuit board via the electrical connection assembly. The height sensor, the electrical connection assembly, and the converter circuit board are all located on the circumferential side of the optical path aperture. The converter circuit board is located in the upper part of the laser cutting head, and the height sensor is located in the lower part of the laser cutting head. The laser cutting head and laser cutting device provided by this utility model solve the problem of insufficient processing accuracy of existing laser cutting heads when processing complex workpieces or workpieces in narrow spaces.

Description

Technical Field

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

[0002] Today, laser cutting technology is widely used in various fields, including automotive thermoforming and aerospace. Laser cutting technology can achieve processes such as cutting, drilling, and trimming of sheet metal, pipes, and three-dimensional parts with complex curved surfaces.

[0003] The 3D five-axis laser cutting head is the core component of a laser cutting machine. The laser cutting head generally integrates a height sensor. During the processing, the height sensor can detect the distance between the cutting head and the workpiece surface and transmit signals to the main control board in real time. The main control board controls the servo motor to drive the cutting head to move in the vertical direction to compensate for the height value and adapt to the distance changes when processing complex curved surfaces of 3D parts. The height sensor is the core component to ensure cutting quality.

[0004] Because the height sensor is located close to the nozzle of the laser cutting head, and the height sensor is electrically connected to the main control board via an external cable, the nozzle may extend into the workpiece when laser cutting complex workpieces. This could cause the cable to interfere with the workpiece when the laser cutting head is processing complex workpieces or workpieces in narrow spaces, thus affecting the processing accuracy. Utility Model Content

[0005] The main purpose of this utility model is to propose a laser cutting head and laser cutting equipment, which aims to solve the problem of insufficient processing accuracy of existing laser cutting heads when processing complex workpieces or workpieces in narrow spaces.

[0006] To achieve the above objectives, this utility model proposes a laser cutting head. The laser cutting head has an optical path through-hole in its axial direction for the laser to pass through, and the laser cutting head is movable in the direction of the laser optical path. The laser cutting head is provided with a height sensor, an electrical connection component, and an adapter circuit board that can be electrically connected to a main control board. The height sensor is electrically connected to the adapter circuit board through the electrical connection component. The height sensor, the electrical connection component, and the adapter circuit board are all located on the circumferential side of the optical path through-hole. The adapter circuit board is located in the upper part of the laser cutting head, and the height sensor is located in the lower part of the laser cutting head.

[0007] According to some embodiments of the present invention, the electrical connection assembly includes a metal contact disposed on the adapter circuit board and a pin connected to the height sensor, wherein the pin is abutted against the metal contact.

[0008] According to some embodiments of the present invention, the laser cutting head includes an upper housing and a lower housing connected to each other. The upper housing has a mounting groove on the side facing the lower housing that surrounds the optical path through hole. The adapter circuit board is disposed in the mounting groove. The height sensor is disposed in the lower housing. The lower housing has an opening on the side facing the upper housing corresponding to the position of the metal contact. The ejector pin can extend out from the opening so that the ejector pin abuts against the metal contact when the upper housing and the lower housing are connected.

[0009] According to some embodiments of this utility model, the ejector pin is telescopically oriented relative to the height sensor, the adapter circuit board is provided with a positioning protrusion, the metal contact is formed on the side of the positioning protrusion facing the lower housing, and the positioning protrusion can extend into the opening and engage with the hole wall of the opening for positioning.

[0010] This utility model also provides a laser cutting device, including a device body, a base, a drive mechanism, and a laser cutting head as described in any of the above. The base is connected to the device body, and the laser cutting head is driven to be connected to the drive mechanism and is moved and disposed on the base in the laser optical path direction by the drive mechanism.

[0011] According to some embodiments of the present invention, the base includes a connecting base and a mounting base for connecting to the device body. The laser cutting head is movably disposed on the connecting base in the laser optical path direction. The mounting base and the connecting base are connected by a magnetic connection assembly.

[0012] According to some embodiments of the present invention, it further includes a distance sensor for detecting the distance between the mounting base and the connecting base and sending information to the main control board, wherein one of the connecting ends of the mounting base and the connecting base has a receiving groove for placing the distance sensor.

[0013] According to some embodiments of the present invention, one of the connecting end of the mounting base and the connecting end of the connecting base is connected to a positioning member, and the other is provided with a positioning hole corresponding to the position of the positioning member, so that the positioning member can be inserted into the positioning hole to realize the positioning connection between the mounting base and the connecting base.

[0014] According to some embodiments of the present invention, the base is provided with a plurality of elastic connectors spaced apart in its circumferential direction, one end of each elastic connector is connected to the side of the mounting base, and the other end is connected to the side of the connecting base.

[0015] According to some embodiments of the present invention, the laser cutting head is provided with a display scale that extends along the laser path, and the base has an indicator portion for indicating the current movement stroke of the laser cutting head.

[0016] This utility model has at least the following beneficial effects:

[0017] In this invention, a height sensor detects the distance between the nozzle of the laser cutting head and the surface of the complex workpiece. This distance information is transmitted to an adapter circuit board via an electrical connection component. The adapter circuit board then transmits the distance information to the main control board. Based on this distance information, the main control board controls the laser cutting head to move along the laser path, thereby moving the nozzle to maintain a consistent distance between the nozzle and the surface of the complex workpiece, ensuring cutting quality. By placing the adapter circuit board at the upper part of the laser cutting head, the connection point of the cable connector is moved from the height sensor located at the lower part of the laser cutting head to the adapter circuit board located at the upper part. Simultaneously, the internal electrical connection component connects the height sensor to the adapter circuit board, preventing interference between the external cable and the complex workpiece when the nozzle of the laser cutting head is inserted into the workpiece for laser cutting. This ensures that the laser cutting head is not affected by the external cable during movement, thus guaranteeing processing accuracy. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of a laser cutting device provided in an embodiment of this utility model;

[0020] Figure 2 for Figure 1 A cross-sectional view of the laser cutting equipment in the image;

[0021] Figure 3 for Figure 1 Structural diagram of the upper shell;

[0022] Figure 4 for Figure 1 Structural diagram of the lower shell;

[0023] Figure 5 for Figure 1 A structural diagram of a laser cutting equipment without its mounting base;

[0024] Figure 6 for Figure 1 The structural diagram of the mounting base.

[0025] Explanation of reference numerals in the attached figures:

[0026] 100-Laser cutting head; 1-Optical path through hole; 2-Upper housing; 21-Adapter circuit board; 22-Mounting slot; 23-Positioning protrusion; 24-Display scale; 3-Lower housing; 31-Height sensor; 32-Opening; 4-Electrical connection assembly; 41-Metal contact; 42-Ejector pin; 1000-Laser cutting equipment; 200-Base; 210-Connecting seat; 211-Receiving slot; 212-Positioning hole; 220-Mounting seat; 230-Magnetic connection assembly; 231-Magnet; 232-Metal part; 240-Distance sensor; 250-Positioning component; 260-Elastic connector; 300-Drive mechanism. Detailed Implementation

[0027] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0030] This utility model provides a laser cutting head and a laser cutting device. Figures 1 to 6 This invention provides a specific embodiment of a laser cutting head and laser cutting equipment.

[0031] like Figure 1 and Figure 2 As shown, this utility model embodiment provides a laser cutting head 100. The laser cutting head 100 has a light path through hole 1 through its axial direction for the laser to pass through, and the laser cutting head 100 is movable in the laser light path direction. The laser cutting head 100 is provided with a height sensor 31, an electrical connection component 4, and a converter circuit board 21 that can be electrically connected to the main control board. The height sensor 31 is electrically connected to the converter circuit board 21 through the electrical connection component 4. The height sensor 31, the electrical connection component 4, and the converter circuit board 21 are all located on the circumferential side of the light path through hole 1. The converter circuit board 21 is located in the upper part of the laser cutting head 100, and the height sensor 31 is located in the lower part of the laser cutting head 100.

[0032] In this invention, a height sensor 31 detects the distance between the nozzle of the laser cutting head 100 and the surface of the complex workpiece. This distance information is transmitted to a transfer circuit board 21 via an electrical connection component 4. The transfer circuit board 21 then transmits the distance information to the main control board. Based on this distance information, the main control board controls the laser cutting head 100 to move along the laser path, thereby moving the nozzle along the laser path to ensure that the distance between the nozzle and the surface of the complex workpiece remains consistent, thus guaranteeing cutting quality. This invention, by placing the transfer circuit board 21 at the upper part of the laser cutting head 100, shifts the cable connector connection point from the height sensor 31 located at the lower part of the laser cutting head 100 to the transfer circuit board 21 located at the upper part of the laser cutting head 100. Simultaneously, the internal electrical connection component 4 connects the height sensor 31 to the transfer circuit board 21, preventing interference between the external cable and the complex workpiece when the nozzle of the laser cutting head 100 is inserted into the workpiece for laser cutting. This ensures that the laser cutting head 100 is not affected by the external cable during movement, thereby guaranteeing processing accuracy.

[0033] It should be noted that, in some embodiments, a temperature sensor is also provided in the lower part of the laser cutting head 100. The temperature sensor is electrically connected to the adapter circuit board 21. The temperature sensor can detect the temperature of the nozzle. When the nozzle temperature is higher than the set temperature, the temperature sensor can send an alarm signal to the adapter circuit board 21 and transmit it to the main control board to remind the operator to perform maintenance.

[0034] Preferably, in some embodiments, a groove for accommodating cables is formed within the laser cutting head 100. This arrangement, by completely embedding the cables within the laser cutting head 100, completely prevents the cables from affecting the movement of the laser cutting head 100.

[0035] The specific structure of the electrical connection component 4 is not limited, as long as it ensures that the electrical connection component 4 enables the height sensor 31 and the adapter circuit board 21 to achieve electrical connection. For example, in some embodiments, such as... Figure 3 and Figure 4 As shown, the electrical connection assembly 4 includes a metal contact 41 disposed on the adapter circuit board 21 and a pin 42 connected to the height sensor 31, the pin 42 being disposed in contact with the metal contact 41. This contact connection method, compared to a traditional rigid connection, facilitates the assembly of the height sensor 31 and the adapter circuit board 21 within the laser cutting head 100, and prevents disconnection when the laser cutting head 100 is subjected to impact causing slight movement between the height sensor 31 and the adapter circuit board 21.

[0036] Furthermore, in some embodiments, such as Figure 3 and Figure 4 As shown, the laser cutting head 100 includes an upper housing 2 and a lower housing 3 connected to each other. The upper housing 2 has a mounting groove 22 surrounding the optical path through-hole 1 on the side facing the lower housing 3. An adapter circuit board 21 is disposed within the mounting groove 22, and a height sensor 31 is disposed within the lower housing 3. The lower housing 3 has an opening 32 corresponding to the position of the metal contact 41 on the side facing the upper housing 2. A push pin 42 can extend from the opening 32 to abut against the metal contact 41 when the upper housing 2 and the lower housing 3 are connected. With this configuration, by simply fixing the adapter circuit board 21 and the height sensor 31 in the upper housing 2 and the lower housing 3 respectively, the electrical connection between the adapter circuit board 21 and the height sensor 31 can be completed simultaneously with the assembly of the upper housing 2 and the lower housing 3, thereby improving the assembly efficiency of the laser cutting head 100.

[0037] Furthermore, in some embodiments, such as Figure 3 and Figure 4As shown, the ejector pin 42 is retractable relative to the height sensor 31. The adapter circuit board 21 has a positioning protrusion 23, and a metal contact 41 is formed on the side of the positioning protrusion 23 facing the lower housing 3. The positioning protrusion 23 can extend into the opening 32 and engage with the wall of the opening 32 for positioning. This configuration, through the engagement of the positioning protrusion 23 and the opening 32, not only improves the connection efficiency between the adapter circuit board 21 and the height sensor 31, and the assembly efficiency of the upper housing 2 and the lower housing 3, but also prevents slight movement of the height sensor 31 and the adapter circuit board 21 when the laser cutting head 100 is impacted. Simultaneously, the retractable design of the ejector pin 42 prevents the positioning protrusion 23 from excessively extending into the opening 32 due to assembly errors of the upper housing 2 and the lower housing 3, thus avoiding damage to the ejector pin 42.

[0038] In addition, this utility model also provides a laser cutting device 1000, including a device body, a base 200, a drive mechanism 300 and the laser cutting head 100. The base 200 is connected to the device body, and the laser cutting head 100 is driven to be connected to the drive mechanism 300 and is driven by the drive mechanism 300 to move and be disposed on the base 200 in the laser optical path direction.

[0039] Specifically, the drive mechanism 300 is a servo motor, which is mounted on the base 200, and the output shaft of the servo motor is connected to the laser cutting head 100 through a transmission mechanism.

[0040] To facilitate operators in determining the travel distance of the laser cutting head 100 along the laser optical path, in some embodiments, such as... Figure 1 As shown, the laser cutting head 100 is provided with a display scale 24, which extends along the laser beam path. The base 200 has an indicator to indicate the current travel distance of the laser cutting head 100. With this configuration, the operator can determine the travel distance of the laser cutting head 100 in the laser beam path by indicating the specific value on the display scale 24 through the indicator.

[0041] In some embodiments, such as Figure 1As shown, the base 200 includes a connecting base 210 and a mounting base 220 for connecting to the device body. The laser cutting head 100 is movably mounted on the connecting base 210 in the laser beam path direction. The mounting base 220 and the connecting base 210 are connected by a magnetic connection assembly 230. With this configuration, when the robotic arm on the device body drives the laser cutting head 100 to move horizontally, if the laser cutting head 100 collides with the workpiece during movement, the magnetic connection assembly 230 disconnects, causing the mounting base 220 to separate from the connecting base 210. This prevents the robotic arm from continuing to drive the laser cutting head 100, which could lead to more severe damage to the laser cutting head 100.

[0042] Specifically, in some embodiments, such as Figure 5 and Figure 6 As shown, the magnetic connection assembly 230 includes a magnet 231 and a metal part 232 that can be attracted by the magnet 231. One of the connecting ends of the mounting base 220 and the connecting base 210 is provided with the magnet 231, and the other is provided with the metal part 232. This arrangement allows the mounting base 220 and the connecting base 210 to be connected through the magnetic attraction of the magnet 231 and the metal part 232. Both the mounting base 220 and the connecting base 210 have through holes for laser transmission. These through holes communicate with the optical path through hole 1 on the laser cutting head 100. Multiple magnets 231 are provided, and the metal parts 232 are arranged around the through holes. The multiple magnets 231 are spaced apart circumferentially around the through holes.

[0043] It should be noted that, in another embodiment, the magnetic connection assembly 230 includes multiple sets of magnets 231 that can attract each other. Each individual magnet 231 in each set is respectively disposed at the connection end of the mounting base 220 and the connection end of the connecting base 210. The connection between the mounting base 220 and the connecting base 210 is achieved through the magnetic connection between the sets of magnets 231.

[0044] Furthermore, in some embodiments, such as Figure 5As shown, the laser cutting equipment 1000 also includes a distance sensor 240 for detecting the distance between the mounting base 220 and the connecting base 210 and sending information to the main control board. One of the connecting ends of the mounting base 220 and the connecting base 210 has a receiving groove 211 for placing the distance sensor 240. With this configuration, when the laser cutting head 100 collides with the workpiece during movement, the magnetic connection assembly 230 disconnects, causing the mounting base 220 to separate from the connecting base 210. The distance between the mounting base 220 and the connecting base 210 becomes greater than a preset distance. Upon receiving the distance information sent by the distance sensor 240, the main control board controls a power cut-off to prevent the robotic arm from driving the laser cutting head 100 to continue moving, which could cause more severe damage to the laser cutting head 100.

[0045] When the laser cutting head 100 collides with the workpiece during movement, the laser cutting equipment 1000 will shut off its power to prevent the robotic arm from driving the laser cutting head 100 to continue moving, which could cause more serious damage to the laser cutting head 100. Afterwards, the operator needs to reset the laser cutting head 100 and adjust the optical path, a process that takes a considerable amount of time. Therefore, in some embodiments, such as... Figure 5 and Figure 6 As shown, one of the connecting ends of the mounting base 220 and the connecting end of the connecting base 210 is connected to a positioning element 250, and the other end has a positioning hole 212 corresponding to the position of the positioning element 250, so that the positioning element 250 can extend into the positioning hole 212 to achieve a positioning connection between the mounting base 220 and the connecting base 210. With this configuration, when the operator resets the laser cutting head 100, the cooperation of the positioning element 250 and the positioning hole 212 enables the mounting base 220 and the connecting base 210 to be quickly reset, eliminating the need for repeated light adjustment by the operator and improving reset efficiency. Specifically, the positioning element 250 is a positioning ball bearing.

[0046] In some embodiments, such as Figure 1 As shown, the base 200 is provided with a plurality of elastic connectors 260 spaced apart in its circumference. One end of each elastic connector 260 is connected to the side of the mounting base 220, and the other end is connected to the side of the connecting base 210. This arrangement allows the elastic connectors 260 to absorb some of the impact force when the laser cutting head 100 is subjected to a collision, reducing damage to the laser cutting head 100. Furthermore, the elastic connectors 260 prevent the mounting base 220 from completely separating from the connecting base 210. Simultaneously, the plurality of elastic connectors 260 can provide a certain positioning function when the operator performs a reset, improving reset efficiency.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A laser cutting head, characterized in that, The laser cutting head has an axially extending optical path through-hole for the laser to pass through, and the laser cutting head is movable in the direction of the laser optical path. The laser cutting head is equipped with a height sensor, an electrical connection component, and an adapter circuit board that can be electrically connected to the main control board. The height sensor is electrically connected to the adapter circuit board through the electrical connection component. The height sensor, the electrical connection component, and the adapter circuit board are all located on the circumferential side of the optical path through-hole. The adapter circuit board is located in the upper part of the laser cutting head, and the height sensor is located in the lower part of the laser cutting head.

2. The laser cutting head as described in claim 1, characterized in that, The electrical connection assembly includes metal contacts on the adapter circuit board and a pin connected to the height sensor, with the pin abutting against the metal contacts.

3. The laser cutting head as described in claim 2, characterized in that, The laser cutting head includes an upper housing and a lower housing connected to each other. The upper housing has a mounting groove on the side facing the lower housing that surrounds the optical path through hole. The adapter circuit board is located in the mounting groove. The height sensor is located in the lower housing. The lower housing has an opening on the side facing the upper housing corresponding to the position of the metal contact. The ejector pin can extend out of the opening so that the ejector pin abuts against the metal contact when the upper housing and the lower housing are connected.

4. The laser cutting head as described in claim 3, characterized in that, The ejector pin is retractable relative to the height sensor. The adapter circuit board is provided with a positioning protrusion. The metal contact is formed on the side of the positioning protrusion facing the lower housing. The positioning protrusion can extend into the opening and engage with the wall of the opening for positioning.

5. A laser cutting device, characterized in that, The device includes a main body, a base, a drive mechanism, and a laser cutting head as described in any one of claims 1 to 4. The base is connected to the main body, and the laser cutting head is driven to move on the base in the laser path direction by the drive mechanism.

6. The laser cutting equipment as described in claim 5, characterized in that, The base includes a connecting base and a mounting base for connecting to the device body. The laser cutting head is movably disposed on the connecting base in the laser optical path direction. The mounting base and the connecting base are connected by a magnetic connection assembly.

7. The laser cutting equipment as described in claim 6, characterized in that, It also includes a distance sensor for detecting the distance between the mounting base and the connecting base and sending information to the main control board, wherein one of the connecting ends of the mounting base and the connecting base has a receiving groove for placing the distance sensor.

8. The laser cutting equipment as described in claim 6, characterized in that, One of the connecting ends of the mounting base and the connecting end of the connecting base is connected to a positioning member, and the other has a positioning hole corresponding to the position of the positioning member, so that the positioning member can be inserted into the positioning hole to realize the positioning connection between the mounting base and the connecting base.

9. The laser cutting equipment as described in claim 6, characterized in that, The base is provided with a plurality of elastic connectors spaced apart in its circumference. One end of each elastic connector is connected to the side of the mounting base, and the other end is connected to the side of the connecting base.

10. The laser cutting equipment as described in claim 5, characterized in that, The laser cutting head is provided with a display scale that extends along the laser beam path, and the base has an indicator section for indicating the current movement stroke of the laser cutting head.

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