Connecting device for a robot laser cutting apparatus

Abstract

The utility model relates to a kind of connecting device of robot laser cutting equipment, including lens assembly, first connecting body and the second connecting body being connected with the first connecting body, the first connecting body has first connecting end, first optical channel and first mounting end, the second connecting body has second connecting end, second optical channel and second mounting end, the first connecting end is used to connect robot, the second connecting end is used to connect laser cutting head, the first mounting end and second mounting end form mounting part for installing the lens assembly, so that laser beam is reflected through the first optical channel through the lens assembly to enter laser cutting head through the second optical channel;The lens assembly includes lens and adjustable unit for adjusting the angle of lens, the adjustable unit includes three adjusting pieces in equilateral triangle distribution, for realizing the lens adjustment of any angle.

Description

Technical Field

[0001] This utility model belongs to the field of CO2 laser cutting technology, specifically relating to a connection device for robotic laser cutting equipment. Background Technology

[0002] CO2 laser cutting technology is mainly used for processing non-metallic materials. Unlike fiber lasers, CO2 lasers can only use mirror reflection or refraction as the transmission method for optical path transmission.

[0003] The main reason CO2 lasers cannot be transmitted through optical fibers is their relatively long wavelength (10.6 micrometers), which falls into the infrared band, while optical fiber transmission has strict wavelength limitations. The transmission characteristics of optical fibers dictate that they are only suitable for short-wavelength lasers (such as visible or ultraviolet light), while the wavelength of CO2 lasers exceeds the transmission range of optical fibers. The long wavelength of CO2 lasers produces significant dispersion effects in optical fibers, leading to decreased beam quality, signal distortion, and the inability to achieve stable transmission. Therefore, transmitting CO2 lasers during motion is particularly difficult.

[0004] Currently, there are four main types of mature CO2 laser processing equipment on the market: three-axis machine tool laser cutting equipment, five-axis machine tool laser cutting equipment, externally guided light arm robotic laser cutting equipment, and internally guided light arm robotic laser cutting equipment. All of these solutions use mirror reflection for light path transmission and employ a cutting head as the final beam shaping mechanism at the actuator end, but their forms differ significantly.

[0005] In three-axis laser cutting equipment, the cutting head is mounted at the end of the Z-axis. This type of equipment can only process flat parts. The cutting head does not need to consider size and interference issues. The cutting head is fixedly installed and does not require a collision detection device. The structure is simple, similar to a CNC machine tool, and the processing accuracy is high. However, the equipment occupies a large area and can only process flat products, and cannot achieve three-dimensional cutting.

[0006] In five-axis laser cutting equipment, the cutting head is mounted at the end of the Z-axis, and two additional rotary axes, RZ and RX, are added. This allows the cutting head to rotate at small angles. However, due to the addition of two axes, the cutting head is larger in size. It can process parts with bevels, but can only cut from the front to the back. A few high-end machines have anti-collision devices, have a simple structure, are similar to CNC machine tools, and have high processing accuracy, enabling simple three-dimensional cutting. However, the equipment occupies a large area, can only perform simple three-dimensional cutting, and cannot perform complex three-dimensional cutting. The large size of the cutting head also prevents the processing of irregularly shaped small parts.

[0007] In external optical guide arm type robotic laser cutting equipment, the optical guide arm is mounted on the robot arm. The robot drives the optical guide arm to move and achieve cutting. The cutting head is the end of the external optical guide arm and is mounted at the robot's six-axis flange. An external optical guide device is still required at the robot's 4th, 5th, and 6th axis connection points. Due to the limitations of the robot's structure, high-power lasers cannot be used. Its advantage is that it superimposes the laser and the robot to achieve a wider range and more complex trajectories. Its disadvantages are that only special robot models can achieve this, a balancing crane is needed to ensure the optical guide arm is supported, the robot's range of motion is limited by the optical guide arm, it can only perform simple three-dimensional part processing, the laser head lacks anti-collision functionality, the laser power is relatively low, and the accuracy is low (limited by the robot's accuracy).

[0008] This internally guided laser arm robotic laser cutting equipment integrates the laser guide arm within the robot arm. The robot employs a hollow structure, with all motors and reducers offset. The laser transmission lens moves along the robot's axis. The robot's six-axis has been removed, and the five-axis has been redesigned, integrating the lens and water-cooling system. An anti-collision device, an independent and removable mechanism, is added between the five-axis and the cutting head. The cutting head integrates focusing, protective gas, and a replaceable cutting nozzle. Its advantages include a highly compact size, not encroaching on any external robot space, making it suitable for integration into other equipment; unrestricted robot movement range, with the laser beam reaching all within the robot's reach; and motion accuracy of ±0.01mm, suitable for complex 3D cutting. The cutting head is perfectly integrated with the robot, essentially functioning as the robot's sixth axis. The disadvantage is that currently, very few robots are suitable for this design.

[0009] For robotic laser cutting equipment with an internal optical guide arm, it is necessary to reflect and guide the laser beam from the robot's five-axis internal cavity to the laser cutting head. Therefore, a connection device for the robotic laser cutting equipment is required. Utility Model Content

[0010] To address the aforementioned problems in the prior art, this utility model provides a connection device for a robotic laser cutting device.

[0011] To achieve the above objectives, the connecting device of the robot laser cutting equipment of this utility model is characterized by comprising a lens assembly, a first connector, and a second connector connected to the first connector. The first connector has a first connecting end, a first optical channel, and a first mounting end. The second connector has a second connecting end, a second optical channel, and a second mounting end. The first connecting end is used to connect to the robot, and the second connecting end is used to connect to the laser cutting head. The first mounting end and the second mounting end form a mounting portion for mounting the lens assembly, so that the laser beam passes through the first optical channel, is reflected by the lens assembly, and passes through the second optical channel to enter the laser cutting head. The lens assembly includes a lens and an adjustable unit for adjusting the lens angle. The adjustable unit includes three adjusting members arranged in an equilateral triangle to achieve lens adjustment at any angle.

[0012] Preferably, the first optical channel and the second optical channel are arranged perpendicularly.

[0013] Preferably, the lens assembly includes a housing, the adjustable unit includes an adjustment ring, the lens is mounted on the adjustment ring, the adjustment member is located inside the housing, one end of the adjustment member is an operable end, and the other end of the adjustment member abuts against one side of the adjustment ring. Adjusting the adjustment member causes the adjustment ring to shift, thereby causing the lens to shift.

[0014] Preferably, the other end of the adjusting member is provided with a spherical body, and the adjusting ring is provided with a wear-resistant block corresponding to the position of the spherical body, so that the adjusting member can be adjusted by rotating the spherical body on the wear-resistant block.

[0015] Preferably, the adjustable unit includes a fixed ring and a connecting ring. One end of the connecting ring is connected to the adjusting ring, and the other end of the connecting ring is engaged with the outer surface of the lens via a flange. The fixed ring is disposed on the housing. There is a gap between the connecting ring and the fixed ring, so that when the adjusting member is adjusted, the connecting ring can move within the gap as the adjusting ring is offset.

[0016] Preferably, a plurality of elastic elements are provided between the fixing ring and the adjusting ring; a sealing element is provided between the adjusting ring and the lens.

[0017] Preferably, the adjusting ring has a first platform, a second platform, and a third platform, wherein the first platform is used to install the elastic element, the second platform is used to install the connecting ring, and the third platform is used to install the sealing element; the first platform, the second platform, and the third platform are located on three different planes. The connecting ring has a fourth platform and a fifth platform, the gap is located between the fourth platform and the lower surface of the fixing ring, and the flange extends from the fifth platform; the fourth platform and the fifth platform are located on two different planes.

[0018] Preferably, the housing is provided with a water-cooling unit for cooling the lens.

[0019] The connecting device of the robot laser cutting equipment of this utility model serves as an intermediate connecting mechanism, connecting the robot's five-axis flange at the top and the laser cutting head at the bottom. It transmits the laser beam path emitted by the robot's five-axis to the cutting head, while ensuring that the beam path does not change when the five-axis rotates. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the connection device of this utility model after the robot laser cutting head is installed.

[0021] Figure 2 This is a first structural schematic diagram of the connection device of the robotic laser cutting equipment of this utility model.

[0022] Figure 3 This is a second structural schematic diagram of the connection device of the robotic laser cutting equipment of this utility model.

[0023] Figure 4 This is a partially exploded schematic diagram of the connection device of the robotic laser cutting equipment of this utility model.

[0024] Figure 5 This is an exploded view of the lens assembly in the connecting device of the robotic laser cutting equipment of this utility model.

[0025] Figure 6 This is a cross-sectional view of the lens assembly in the connecting device of the robotic laser cutting equipment of this utility model. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] like Figures 1 to 6 The diagram shows a specific embodiment of the connection device 1 for the robot laser cutting equipment of this utility model. The connection device 1 includes a lens assembly 5, a first connector 4, and a second connector 3 connected to the first connector 4. The first connector 4 has a first connecting end, a first optical channel, and a first mounting end. The second connector 3 has a second connecting end, a second optical channel, and a second mounting end. The first connecting end is used to connect the robot's five axes, and the second connecting end is used to connect the laser cutting head 2, thereby realizing the connection function between the robot and the laser cutting head.

[0028] like Figures 2 to 4As shown, the first mounting end and the second mounting end form a mounting portion for mounting the lens assembly 5, so that the laser beam passes through the first optical channel, is reflected by the lens assembly 5, and then passes through the second optical channel to enter the laser cutting head. The first optical channel and the second optical channel are arranged perpendicularly. That is, the mounting portion is located at the bend to reflect the laser beam.

[0029] like Figure 5 and Figure 6 As shown, the lens assembly 5 includes a lens 7 and an adjustable unit for adjusting the lens angle. The adjustable unit includes three adjusting members 11 arranged in an equilateral triangle to achieve lens adjustment at any angle. The arrangement of the three adjusting members 11 allows for adjustment of the lens 7 to any angle.

[0030] The lens assembly 5 includes a housing 6, the adjustable unit includes an adjusting ring 9, the lens 7 is mounted on the adjusting ring 9, the adjusting member 11 is located inside the housing 6, one end of the adjusting member 11 is an operable end, and the other end of the adjusting member 11 abuts against one side of the adjusting ring 9. Adjusting the adjusting member 11 causes the adjusting ring 9 to shift, thereby causing the lens 7 to shift.

[0031] like Figure 6 As shown, a spherical body 15 is provided at the other end of the adjusting member 11, and a wear-resistant block 16 is provided on the adjusting ring 9 corresponding to the position of the spherical body 15. When adjusting the adjusting member 11, the spherical body 15 rotates on the wear-resistant block 16 to extend the service life of the adjusting ring 9.

[0032] like Figure 5 and Figure 6 As shown, the adjustable unit includes a fixed ring 14 and a connecting ring 8. One end of the connecting ring 8 is connected to the adjusting ring 9, and the other end of the connecting ring 8 is engaged with the outer surface of the lens 7 via a flange. The fixed ring 14 is disposed on the housing 6. There is a gap 17 between the connecting ring 8 and the fixed ring 14, so that when the adjusting member 11 is adjusted, the connecting ring 8 can move within the gap 17 as the adjusting ring 9 is offset.

[0033] like Figure 5 and Figure 6 As shown, a plurality of elastic elements 13 are provided between the fixed ring 14 and the adjusting ring 9; a sealing element 12 is provided between the adjusting ring 9 and the lens 7.

[0034] like Figure 5 and Figure 6As shown, the adjusting ring 9 has a first platform, a second platform, and a third platform. The first platform is used to install the elastic element 13, the second platform is used to install the connecting ring 8, and the third platform is used to install the sealing element 12. The first platform, the second platform, and the third platform are located on three different planes.

[0035] The connecting ring 8 has a fourth platform and a fifth platform, the gap is located between the fourth platform and the lower surface of the fixing ring 14, and the flange extends from the fifth platform; the fourth platform and the fifth platform are located on two different planes.

[0036] The outer casing is equipped with a water-cooling unit 10 for cooling the lens. This allows the connecting device 1 of this invention to be adapted to devices with laser power up to 3000W, ensuring that the lens can withstand such a high-power beam irradiation for an extended period.

[0037] The connecting device of the robot laser cutting equipment of this utility model serves as an intermediate connecting mechanism, connecting the robot's five-axis flange at the top and the laser cutting head at the bottom. It transmits the laser beam path emitted by the robot's five-axis to the cutting head, while ensuring that the beam path does not change when the five-axis rotates.

[0038] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, the specification and drawings should be considered illustrative rather than restrictive.

Claims

1. A connecting device for a robotic laser cutting device, characterized in that, The device includes a lens assembly, a first connector, and a second connector connected to the first connector. The first connector has a first connecting end, a first optical channel, and a first mounting end. The second connector has a second connecting end, a second optical channel, and a second mounting end. The first connecting end is used to connect to a robot, and the second connecting end is used to connect to a laser cutting head. The first and second mounting ends form a mounting portion for mounting the lens assembly, so that the laser beam passes through the first optical channel, is reflected by the lens assembly, and passes through the second optical channel to enter the laser cutting head. The lens assembly includes a lens and an adjustable unit for adjusting the lens angle. The adjustable unit includes three adjusting members arranged in an equilateral triangle to achieve lens adjustment at any angle.

2. The connecting device for the robotic laser cutting equipment according to claim 1, characterized in that, The first and second optical channels are arranged vertically.

3. The connecting device for the robotic laser cutting equipment according to claim 1, characterized in that, The lens assembly includes a housing, the adjustable unit includes an adjustment ring, the lens is mounted on the adjustment ring, the adjustment member is located inside the housing, one end of the adjustment member is an operable end, and the other end of the adjustment member abuts against one side of the adjustment ring. Adjusting the adjustment member causes the adjustment ring to shift, which in turn causes the lens to shift.

4. The connecting device for the robotic laser cutting equipment according to claim 3, characterized in that, The other end of the adjusting member is provided with a spherical body, and the adjusting ring is provided with a wear-resistant block corresponding to the position of the spherical body. When adjusting the adjusting member, the spherical body rotates on the wear-resistant block.

5. The connecting device for the robotic laser cutting equipment according to claim 3, characterized in that, The adjustable unit includes a fixed ring and a connecting ring. One end of the connecting ring is connected to the adjusting ring, and the other end of the connecting ring is engaged with the outer surface of the lens via a flange. The fixed ring is disposed on the housing. There is a gap between the connecting ring and the fixed ring, so that when the adjusting element is adjusted, the connecting ring can move within the gap as the adjusting ring is offset.

6. The connecting device for the robotic laser cutting equipment according to claim 5, characterized in that, Multiple elastic elements are provided between the fixed ring and the adjusting ring; a sealing element is provided between the adjusting ring and the lens.

7. The connecting device for the robotic laser cutting equipment according to claim 6, characterized in that, The adjusting ring has a first platform, a second platform, and a third platform. The first platform is used to install the elastic element, the second platform is used to install the connecting ring, and the third platform is used to install the sealing element. The first platform, the second platform, and the third platform are located on three different planes. The connecting ring has a fourth platform and a fifth platform, the gap is located between the fourth platform and the lower surface of the fixing ring, and the flange extends from the fifth platform; The fourth and fifth platforms are located on two different planes.

8. The connecting device for the robotic laser cutting equipment according to claim 3, characterized in that, The outer casing is equipped with a water-cooling unit for cooling the lens.

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