Focus adjustment mechanism and laser processing device and processing system

Abstract

This utility model discloses a focal length adjustment mechanism, a laser processing device, and a processing system. The focal length adjustment mechanism includes a drive component, a focusing section, and a focusing lens assembly. The output end of the drive component is connected to the focusing section and is used to drive the focusing section to move along the light emission direction. The focusing section, moving along the light emission direction, is used to adjust the position of the focusing lens assembly in the light emission direction. The focusing lens assembly is disposed on the focusing section and moves with the focusing section along the light emission direction to change the focal point position of the laser. This utility model drives the focusing section to move along the light emission direction through the drive component, thereby causing the focusing lens assembly to move synchronously, thus accurately adjusting the laser focal point position. This achieves rapid and accurate adjustment of the focal point position, improving the flexibility and precision of laser processing. Simultaneously, the structure is simple and reliable, easy to control and maintain, and significantly improves processing efficiency and quality.

Description

Technical Field

[0001] This utility model belongs to the field of laser processing technology, and in particular relates to a focal length adjustment mechanism, a laser processing device, and a processing system. Background Technology

[0002] In the field of laser welding technology, traditional welding torches typically employ a fixed-focus design. The core problem is that when different defocusing amounts (such as positive defocusing and negative defocusing) are required, users must physically replace the torch nozzles with different focal lengths and adjust the position of the wire feeding assembly accordingly.

[0003] This design has significant drawbacks: 1. Cumbersome operation and poor flexibility: Users cannot perform continuous, stepless focus adjustment and are limited to a few preset focus points (such as +2, 0, -2), making it difficult to accurately obtain the best welding effect. 2. Low efficiency and high cost: The process of replacing parts and readjusting positions is time-consuming and labor-intensive, reducing processing efficiency and increasing the cost of using and managing spare parts. 3. Poor user experience: The entire process interrupts the continuity of welding operations, requires a high level of technical skill from operators, and cannot achieve quick and convenient focus adjustment. Utility Model Content

[0004] In view of this, the present invention provides a focal length adjustment mechanism, a laser processing device and a processing system, which aims to solve the technical problem that the existing welding gun head adopts a fixed focal length design, making it difficult to adapt to welding scenarios with different requirements for the focal point position.

[0005] In a first aspect, this utility model provides a focal length adjustment mechanism, including a drive assembly, a focusing part, and a focusing lens assembly; The output end of the drive component is connected to the focusing part, and is used to drive the focusing part to move along the light output direction; The focusing unit moves along the light emission direction to adjust the position of the focusing lens assembly in the light emission direction; The focusing lens assembly is disposed on the focusing section and moves along the light emission direction with the focusing section to change the focal position of the laser.

[0006] Preferably, the driving assembly includes a fixing part and a driving part; the fixing part and the focusing part are slidably coupled along the light emission direction; the driving part and the focusing part are connected by a driving connector.

[0007] Preferably, the drive unit includes a drive motor, a transmission screw, and a drive connector; the power output end of the drive motor is connected to the transmission screw, and the drive connector is fitted onto the transmission screw.

[0008] Preferably, the driving part further includes a guide support part, and the driving part is fixed to the fixing part by the guide support part.

[0009] Preferably, the fixing part includes a housing and a mating hole provided on the housing along the light emission direction, and the focusing part passes through the mating hole.

[0010] Preferably, the side wall of the housing is provided with an adjustment hole, and the drive connector passes through the adjustment hole and is fixedly connected to the focusing part through the mounting hole.

[0011] Preferably, the focusing lens assembly includes an optical lens and a locking part, wherein the optical lens is disposed within the focusing part and fixed by the locking part.

[0012] Preferably, the locking part includes a pressure ring and a locking ring, which are configured to cooperate with each other to clamp and fix the optical lens.

[0013] Secondly, this utility model also provides a laser processing device, which includes the focal length adjustment mechanism provided in the first aspect.

[0014] Thirdly, this utility model also provides a laser processing system, which includes the laser processing device provided in the second aspect.

[0015] Implementing the embodiments of this utility model will have at least the following beneficial effects: This invention uses a drive assembly to move the focusing unit along the light emission direction, thereby synchronously moving the focusing lens assembly. This allows for precise adjustment of the laser focal point, achieving rapid and accurate adjustment of the focal point, improving the flexibility and precision of laser processing. Simultaneously, the structure is simple and reliable, easy to control and maintain, and significantly improves processing efficiency and quality. By directly connecting the drive motor to the focusing unit (i.e., the focusing lens assembly), backlash and assembly errors caused by intermediate components such as the housing and other connecting parts can be eliminated, enabling precise control of the focusing lens assembly. Furthermore, by directly driving the focusing lens assembly with a motor, the focusing lens assembly is lighter and has less inertia, resulting in a faster dynamic response speed and achieving high-frequency, high-efficiency focusing.

[0016] Compared to the fixed-focus design of traditional welding guns, this invention features a sliding focusing lens assembly, which allows for flexible adjustment of the laser beam's focal point. This eliminates the need to replace the nozzle and wire feeding assembly, enabling positive and negative defocus adjustment for welding. This significantly reduces welding costs, achieves ultra-high precision laser welding, and meets the needs of welding applications with varying focal point requirements. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a perspective view of the focus adjustment mechanism in one embodiment.

[0019] Figure 2 This is an exploded view of the focus adjustment mechanism in one embodiment.

[0020] Figure 3 This is a partial enlarged view of the drive unit in one embodiment.

[0021] Figure label: 1. Drive assembly; 101. Fixing part; 1011. Housing; 1012. Mating hole; 1013. Adjustment hole; 102. Drive part; 1021. Drive motor; 1022. Transmission screw; 1023. Drive connector; 1024. Guide support part; 10241. Support frame; 10242. Guide rod; 10243. Fixing screw; 2. Focusing section; 201 mounting hole; 3. Focusing lens assembly; 301. Optical lens; 302. Locking part; 3021. Pressure ring; 3022. Locking ring. Detailed Implementation

[0022] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0023] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0024] In one embodiment of the focus adjustment mechanism, such as Figure 1-3 As shown, the mechanism includes: a drive assembly 1, a focusing unit 2, and a focusing lens assembly 3; The output end of the drive component 1 is connected to the focusing part 2 and is used to drive the focusing part 2 to move along the light output direction. The focusing unit 2 moves along the light-emitting direction to adjust the position of the focusing lens assembly in the light-emitting direction; The focusing lens assembly 3 is disposed on the focusing part 2 and moves along the light output direction with the focusing part 2 to change the focal position of the laser.

[0025] This invention drives the focusing unit 2 to move along the light output direction through the driving component 1, thereby causing the focusing lens component 3 to move synchronously, thus accurately adjusting the laser focal point position. This achieves rapid and accurate adjustment of the focal point position, improving the flexibility and precision of laser processing. At the same time, the structure is simple and reliable, easy to control and maintain, and significantly improves processing efficiency and quality.

[0026] It should be noted that the light output direction is the direction in which the laser beam self-focusing mirror assembly 3 emits light from the driving assembly 1; the output end of the driving assembly 1 is the end from which the laser beam is output.

[0027] In some embodiments, reference Figure 1 The drive assembly 1 includes a fixing part 101 and a drive part 102; the drive part 102 is fixed on the fixing part 101 by a guide support part 1024, and its output end is connected to the focusing part 2 by a drive connector 1023.

[0028] The fixing part 101 and the focusing part 2 are slidably coupled along the light-emitting direction.

[0029] The fixing part 101 serves as the mounting base and support structure for the drive assembly 1, and is typically a rigid component.

[0030] In this embodiment, reference Figure 2 The fixing part 101 includes a housing 1011 and a mating hole 1012 provided on the housing 1011 along the light emission direction, and the focusing part 2 passes through the mating hole 1012.

[0031] The side wall of the housing 1011 is provided with an adjustment hole 1013 along the light emission direction, and the side wall of the focusing part 2 is provided with a mounting hole 201 on the side near the drive connector 1023; the drive connector 1023 passes through the adjustment hole 1013 and is fixedly connected to the focusing part 2 through the mounting hole 201.

[0032] For example, the housing 1011 is a cylindrical body, so that the focusing part 2 is embedded inside the cylindrical body and slides along the axial direction of the cylindrical body. With this configuration, the housing 1011 serves as both an installation support structure and a guide structure for the sliding of the focusing part 2.

[0033] The adjustment hole 1013 is a racetrack-shaped hole, and its axial length is the range of movement of the drive connector 1023, which is the range of movement of the focusing lens assembly 3 that can be adjusted; the mounting hole 201 is provided on the focusing part 2 and is used to fix the drive connector 1023.

[0034] In some embodiments, the fixing part 101 and the focusing part 2 are slidably coupled along the light emission direction.

[0035] For example, the focusing part 2 passes through the fixing part 101 (i.e., the housing 1011) and slides axially along the mating hole 1012 of the fixing part 101.

[0036] In some embodiments, continue to refer to Figure 1 The drive unit 102 includes a drive motor 1021, a transmission screw 1022, and a drive connector 1023. The power output end of the drive motor 1021 is connected to the transmission screw 1022 and is fixed to the fixing part 101 through the transmission screw 1022. One side of the drive connector 1023 is sleeved on the transmission screw 1022, and the other side passes through the fixing part 101 and is connected to the focusing part 2.

[0037] refer to Figure 3 The drive connector 1023 has a strip-shaped protrusion on the side away from the transmission screw 1022, which can pass through the focusing part 2 of the adjustment hole 1013.

[0038] In this embodiment, the focusing part 2 is provided with a mounting hole 201, and the end of the drive connector 1023 passes through the mounting hole 201 to achieve a fixed connection between the drive connector 1023 and the focusing part 2.

[0039] It should be added that the transmission screw 1022 is provided with a spiral pattern, which facilitates the sliding of the drive connector 1023 and can effectively adjust the sliding distance of the drive connector 1023, thereby driving the focusing part 2 to move and realize the precise adjustment of the laser beam focus.

[0040] For example, the drive motor 1021 drives the transmission screw 1022 to rotate clockwise, thereby causing the drive connector 1023 to move forward along the light emission direction; the drive motor 1021 drives the transmission screw 1022 to rotate counterclockwise, thereby causing the drive connector 1023 to move backward along the light emission direction.

[0041] In some embodiments, reference Figure 1 The driving part 102 further includes a guide support part 1024, and the driving part 102 is fixed to the fixing part 101 by the guide support part 1024.

[0042] The transmission screw 1022 and the drive connector 1023 are both mounted on the guide support 1024.

[0043] The guide support 1024 includes a support frame 10241 and a guide rod 10242. The support frame 10241 is fastened to the fixing part 101 by fixing screws 10243. The guide rod 10242 and the transmission screw 1022 are arranged in parallel on the support frame 10241. The drive connector 1023 is sleeved on the guide rod 10242 and the transmission screw 1022.

[0044] The drive unit 102 is fixed to the housing 1011 by a support frame 10241 and fixing screws 10243.

[0045] In some embodiments, the focusing part 2 is a fixing seat that matches the shape and size of the housing 1011.

[0046] For example, if the housing 1011 is a cylindrical body, then the focusing part 2 is also a cylindrical fixing seat, which is installed inside the housing 1011.

[0047] In some embodiments, reference Figure 2 The focusing lens assembly 3 includes an optical lens 301 and a locking part 302. The optical lens 301 is fitted inside the focusing part 2 and fixed by the locking part 302.

[0048] The locking part 302 includes a clamping ring 3021 and a locking ring 3022. The clamping ring 3021 and the locking ring 3022 are configured to cooperate with each other so that they work together to clamp and fix the optical lens 301.

[0049] In this utility model, the drive motor 1021 drives the transmission screw 1022 to rotate clockwise, thereby driving the drive connector 1023 to move forward along the light output direction, so that the focusing part 2 drives the optical lens 301 to move forward along the light output direction, ultimately shortening the relative distance between the optical lens 301 and the imaging surface or the object being measured, and realizing precise forward adjustment of the focal position.

[0050] The drive motor 1021 drives the transmission screw 1022 to rotate counterclockwise, thereby causing the drive connector 1023 to move backward along the light output direction, so that the focusing part 2 drives the optical lens 301 to move backward along the light output direction, ultimately increasing the relative distance between the optical lens 301 and the imaging surface or the object being measured, and achieving precise back-adjustment of the focal position.

[0051] This utility model also provides a laser processing device, which includes the above-mentioned focal length adjustment mechanism.

[0052] It is understood that the laser processing apparatus of this utility model uses the aforementioned focal length adjustment mechanism, which includes a drive assembly 1, a focusing section 2, and a focusing lens assembly 3. The output end of the drive assembly 1 is connected to the focusing section 2 and is used to drive the focusing section 2 to move along the light emission direction. The focusing section, moving along the light emission direction, is used to adjust the position of the focusing lens assembly 3 in the light emission direction. The focusing lens assembly 3 is disposed on the focusing section 2 and moves with the focusing section 2 along the light emission direction to change the focal point position of the laser. This laser processing apparatus has the effective effects of the focal length adjustment mechanism provided in the above embodiments, which will not be elaborated further here.

[0053] This utility model also provides a laser processing system, including the laser processing device described in the above embodiments.

[0054] It is understood that the laser processing system of this utility model uses the aforementioned laser processing device, which in turn uses the aforementioned focal length adjustment mechanism. This laser processing system also possesses the effective effects of the focal length adjustment mechanism provided in the above embodiments, which will not be elaborated upon here.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A focus adjustment mechanism, characterized in that, Includes drive components, focusing unit, and focusing lens assembly; The output end of the drive component is connected to the focusing part, and is used to drive the focusing part to move along the light output direction; The focusing unit moves along the light emission direction to adjust the position of the focusing lens assembly in the light emission direction; The focusing lens assembly is disposed on the focusing section and moves along the light emission direction with the focusing section to change the focal position of the laser.

2. The focus adjustment mechanism according to claim 1, characterized in that, The driving assembly includes a fixing part and a driving part; the fixing part and the focusing part are slidably coupled along the light emission direction; the driving part and the focusing part are connected by a driving connector.

3. The focus adjustment mechanism according to claim 2, characterized in that, The drive unit includes a drive motor, a transmission screw, and a drive connector; the power output end of the drive motor is connected to the transmission screw, and the drive connector is fitted onto the transmission screw.

4. The focus adjustment mechanism according to claim 3, characterized in that, The drive unit further includes a guide support, and the drive unit is fixed to the fixed unit via the guide support.

5. The focus adjustment mechanism according to claim 2, characterized in that, The fixing part includes a housing and a mating hole provided on the housing along the light emission direction, and the focusing part passes through the mating hole.

6. The focus adjustment mechanism according to claim 5, characterized in that, The side wall of the housing is provided with adjustment holes, and the drive connector passes through the adjustment holes and is fixedly connected to the focusing part through the mounting holes.

7. The focus adjustment mechanism according to claim 1, characterized in that, The focusing lens assembly includes an optical lens and a locking part. The optical lens is disposed in the focusing part and fixed by the locking part.

8. The focus adjustment mechanism according to claim 7, characterized in that, The locking part includes a pressure ring and a locking ring, which are configured to cooperate with each other to clamp and fix the optical lens.

9. A laser processing apparatus, characterized in that, It includes the focal length adjustment mechanism as described in any one of claims 1 to 8.

10. A laser processing system, characterized in that, It includes the laser processing apparatus as described in claim 9.

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