Laser welding head temperature closed-loop control light path system

Abstract

The utility model relates to a laser welding head temperature closed-loop control optical path system which comprises a bottom main supporting seat, a main supporting seat and a QBH optical fiber connector, the bottom of the QBH optical fiber connector is installed on the top of the main supporting seat through the QBH supporting seat, and the main supporting seat is installed on the bottom main supporting seat; a temperature control fixing frame is installed on the left side of the main supporting seat, a temperature control supporting frame is installed on the temperature control fixing frame, a temperature control base is installed on the temperature control supporting frame, and a temperature control probe is installed on the temperature control base and located over the molten pool. According to the novel temperature closed-loop control light path system of the welding head, the temperature control probe for measuring the temperature is vertically installed above the welding part, real-time monitoring of the welding part is achieved through the beam combiner, and the accuracy of the real-time temperature can be guaranteed to the maximum degree.

Description

Technical Field

[0001] The utility model relates to the technical field related to laser welding heads, and in particular to a temperature closed-loop control optical path system for laser welding heads. Background Art

[0002] Most laser welding heads on the market currently use coaxial temperature measurement mode to monitor the welding process in real time. These laser welding heads need to go through multiple lens reflections to complete the temperature monitoring of the welding process, which is prone to deviations in temperature accuracy and affects the actual welding pass rate.

[0003] After massive searches, it was found that the prior art publication number CN215615791U is a comparative document 1, which discloses a coaxial temperature measurement visual square spot laser welding head, including a laser joint, a focusing lens and a flat-top beam generator. The flat-top beam generator is arranged on the optical path between the laser joint and the focusing lens to shape the beam and homogenize the laser emitted by the laser joint and input it into the focusing lens for focusing. The laser beam is shaped by setting a flat-top beam generator so that the beam changes from a circle to a square, meeting the requirements of the weld for a square spot. At the same time, the flat-top beam generator is arranged to generate evaluation light, so that the energy distribution of the spot is uniform and the spot boundary is clear. The two flat-top beam generators are arranged to meet the requirements of setting a flat-top beam generator, so that the halo, halo and other poor focusing phenomena of the laser beam can be effectively removed, the laser quality can be improved, and then the direct welding quality can be provided.

[0004] In the above-mentioned comparative document 1, temperature measurement and monitoring are achieved by reflecting the light twice after welding, which may easily affect the accuracy of actual temperature measurement due to the reflectivity and transmittance of the lens.

[0005] In view of the above-mentioned defects, the designers have actively carried out research and innovation in order to create a laser welding head temperature closed-loop control optical path system to make it more valuable for industrial use. Utility Model Content

[0006] In order to solve the above technical problems, the purpose of the utility model is to provide a temperature closed-loop control optical path system for a laser welding head.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] The laser welding head temperature closed-loop control optical path system includes a bottom main support seat, a main support seat and a QBH optical fiber connector. The bottom of the QBH optical fiber connector is installed on the top of the main support seat through the QBH support seat, and the main support seat is installed on the bottom main support seat;

[0009] A temperature control fixing frame is installed on the left side of the main supporting seat, a temperature control supporting frame is installed on the temperature control fixing frame, a temperature control base is installed on the temperature control supporting frame, a temperature control probe is installed on the temperature control base, and the temperature control probe is located directly above the molten pool.

[0010] As a further improvement of the utility model, the collimating lens group is installed on the inner side of the top of the main support seat with the convex surface facing downward, and the QBH optical fiber connector is located directly above the collimating lens group, and a focusing lens and a protective lens are installed on the inner side of the bottom of the main support seat from top to bottom, and the temperature control probe is located directly above the focusing lens, and a wire feeder bracket is installed on the outer side of the bottom of the main support seat;

[0011] A CCD bracket is installed on the right side of the main supporting seat, and an image lens is installed on the top of the CCD bracket.

[0012] As a further improvement of the utility model, an annular blue light is installed at the bottom of the wire feeder bracket, and the annular blue light is located directly above the molten pool.

[0013] As a further improvement of the utility model, the bottom of the wire feeder bracket is connected to the annular blue light below through an LED connecting ring.

[0014] As a further improvement of the utility model, a beam combiner mirror 1 is installed at an angle on the left side of the main support seat, a beam combiner mirror 3 is installed at an angle on the right side of the main support seat, and a beam combiner mirror 2 is installed at an angle on the right side of the CCD bracket. The beam combiner mirror 1 is located directly below the temperature control probe, the beam combiner mirror 3 is located directly below the collimating lens group, and the beam combiner mirror 2 is located directly below the imaging lens.

[0015] As a further improvement of the utility model, a CCD bracket bottom cover is installed on the CCD bracket on the right side of the second beam combiner.

[0016] As a further improvement of the present invention, the inclination angles of the first beam combiner, the third beam combiner and the second beam combiner are all the same.

[0017] As a further improvement of the utility model, the bottom of the image lens is installed on the top of the CCD bracket through a fixing ring, and then covered on the CCD bracket with a CCD bracket cover.

[0018] As a further improvement of the utility model, the collimating lens group is installed on the top inner side of the main support seat through the collimating lens elastic pressure plate, and the focusing lens is installed on the bottom inner side of the main support seat through the focusing lens elastic pressure plate.

[0019] As a further improvement of the utility model, a protective mirror rotating sleeve is installed on the outer side of the protective mirror, a rotating bracket is installed on the outer side of the protective mirror rotating sleeve, and a wire feeder bracket is installed on the outer side of the rotating bracket.

[0020] By means of the above scheme, the utility model has at least the following advantages:

[0021] The utility model discloses an optical path system for temperature closed-loop control of the welding head, wherein the temperature control probe for measuring temperature is vertically installed above the welding material, and a beam combining mirror is used to realize real-time monitoring of the welding material, thereby ensuring the accuracy of the real-time temperature to the greatest extent.

[0022] The three sets of beam combining mirrors of the utility model are installed in parallel, and the temperature control probe and the welding material are installed vertically at the same time, so that the real-time monitoring of the welding part can be realized through a beam combining mirror, thereby minimizing the temperature measurement error caused by multiple reflections and increasing the temperature measurement accuracy during the welding process.

[0023] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the structure of a temperature closed-loop control optical path system for a laser welding head of the utility model;

[0026] Figure 2 yes Figure 1 Schematic diagram of the internal structure;

[0027] Figure 3 It is a schematic diagram of an application scenario of the utility model.

[0028] The meanings of the various reference numerals in the figures are as follows.

[0029] 1. Temperature control probe; 2. Temperature control base; 3. Temperature control support frame; 4. Temperature control fixing frame; 5. Wire feeder bracket; 6. Ring blue light; 7. Bottom main support seat; 8. CCD bracket bottom cover; 9. CCD bracket; 10. CCD bracket cover; 11. Main support seat; 12. Imaging lens; 13. QBH support seat; 14. QBH optical fiber connector; 15. Collimator mirror elastic pressure plate; 16. Collimator lens group; 17. Beam combiner 1; 18. Focusing mirror; 19. Focusing mirror elastic pressure plate; 20. Protective mirror; 21. Protective mirror rotating sleeve; 22. Beam combiner 2; 23. Beam combiner 3; 24. Rotating bracket; 25. LED connecting ring; 26. Fixing ring; 27. Molten pool. DETAILED DESCRIPTION

[0030] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] In order to make the technical personnel in the technical field better understand the scheme of the utility model, the technical scheme in the embodiment of the utility model will be clearly and completely described below in combination with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model for protection, but only represents the selected embodiment of the utility model. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the utility model.

[0032] like Figure 1 to Figure 3 As shown, a temperature closed-loop control optical path system of a laser welding head includes a bottom main support seat 7, a main support seat 11 and a QBH optical fiber connector 14. The bottom of the QBH optical fiber connector 14 is installed on the top of the main support seat 11 through the QBH support seat 13, and the main support seat 11 is installed on the bottom main support seat 7. A temperature control fixing frame 4 is installed on the left side of the main support seat 11, a temperature control support frame 3 is installed on the temperature control fixing frame 4, a temperature control base 2 is installed on the temperature control support frame 3, and a temperature control probe 1 is installed on the temperature control base 2. The temperature control probe 1 is located directly above the molten pool 27.

[0033] The collimating lens group 16 is installed on the top inner side of the main support seat 11 with the convex surface facing downward. The focusing lens 18 and the protective lens 20 are installed on the bottom inner side of the main support seat 11 from top to bottom in sequence, and the temperature control probe 1 is located directly above the focusing lens 18. The wire feeder bracket 5 is installed on the bottom outer side of the main support seat 11, and the annular blue light 6 is installed on the bottom of the wire feeder bracket 5. The collimating lens group 16 is installed on the top inner side of the main support seat 11 through the collimating lens elastic pressure plate 15, and the focusing lens 18 is installed on the bottom inner side of the main support seat 11 through the focusing lens elastic pressure plate 19. A protective lens rotating sleeve 21 is installed on the outside of the protective lens 20, a rotating bracket 24 is installed on the outside of the protective lens rotating sleeve 21, and a wire feeder bracket 5 is installed on the outside of the rotating bracket 24. The bottom of the wire feeder bracket 5 is connected to the annular blue light 6 below through the LED connecting ring 25, and the annular blue light 6 is located directly above the molten pool 27.

[0034] A temperature control fixing frame 4 is installed on the left side of the main supporting seat 11 , a temperature control supporting frame 3 is installed on the temperature control fixing frame 4 , a temperature control base 2 is installed on the temperature control supporting frame 3 , and a temperature control probe 1 is installed on the temperature control base 2 .

[0035] A CCD bracket 9 is installed on the right side of the main support seat 11, and an imaging lens 12 is installed on the top of the CCD bracket 9. The bottom of the imaging lens 12 is installed on the top of the CCD bracket 9 through a fixing ring 26, and then covered on the CCD bracket 9 with a CCD bracket cover 10.

[0036] A beam combiner 17 is installed obliquely on the left side of the main support seat 11, a beam combiner 3 23 is installed obliquely on the right side of the main support seat 11, a beam combiner 22 is installed obliquely on the right side of the CCD bracket 9, and a CCD bracket bottom cover 8 is installed on the CCD bracket 9 on the right side of the beam combiner 22. The beam combiner 17 is located directly below the temperature control probe 1, the beam combiner 3 23 is located directly below the collimating lens group 16, and the beam combiner 22 is located directly below the imaging lens 12. The inclination angles of the beam combiner 17, the beam combiner 3 23 and the beam combiner 22 are all the same.

[0037] The first embodiment of the utility model:

[0038] A laser welding head comprises a temperature control probe 1, a temperature control base 2, a temperature control support frame 3, a temperature control fixed frame 4, a rotating frame 5, an annular blue light 6, a bottom main support seat 7, a CCD support cover 8, a CCD support 9, a CCD support cover 10, a main support seat 11, an imaging lens 12, a QBH support seat 13, a QBH optical fiber lens 14, a collimating lens group 16, a beam combiner 17, a focusing lens 18, a beam combiner 22 and a beam combiner 3 23. The temperature control probe 1 is installed together with the temperature control base 2 below, the bottom of the temperature control support frame 3 is installed together with the temperature control base frame 2, and the temperature control fixed frame 4 is below the temperature control support frame 3. The temperature control fixing frame 4 and the main support seat 11 are installed together, the beam combining mirror 1 17 is installed in the main support seat 11 through the temperature control fixing frame 4, the main support seat 11 and the CCD bracket 9 below are installed together, and the bottom main support seat 7 is installed below the main support seat 11, the beam combining mirror 3 23 is installed in the main support seat 11 through the CCD bracket 9, the outer side of the CCD bracket 9 is the CCD bracket bottom cover 8, and the beam combining mirror 2 22 is installed in the CCD bracket 9 through the CCD bracket bottom cover 8.

[0039] The collimator lens group 16 is installed in the main support frame 11 with the convex surface facing downward, and is fixed by the collimator lens elastic pressure plate 15. A QBH support seat 13 is installed above the main support frame 11, and the upper QBH optical fiber connector 14 is installed together with the QBH support seat 13. The CCD bracket 9 is installed together with the upper fixing ring 26, the image lens 12 is installed in the fixing ring 26, and the CCD bracket cover 10 is installed on the CCD bracket 9.

[0040] A focusing lens 18 is installed below the main support seat 11, and the focusing lens 18 is fixed by a focusing lens elastic pressure plate 19. A protective lens 20 is installed at the bottom of the main support seat 11, and a protective lens rotating sleeve 21 is installed on the periphery to fix it. A rotating bracket 24 is installed outside the protective lens rotating sleeve 21, and a wire feeder bracket 5 is installed on the outermost periphery. A ring blue light 6 is installed at the bottom of the wire feeder bracket 5, and an LED connecting ring 25 is used to connect the ring blue light 6 and the wire feeder bracket 5.

[0041] About the working principle of laser welding machine:

[0042] Connect the optical fiber to the QBH optical fiber connector 14. After the laser is emitted, it is collimated by the collimating lens group 16 and then shines on the beam combiner 3 23. After reflection, it shines on the beam combiner 1 17, and then the beam combiner 1 17 reflects the laser to the pad. The light on the pad passes through the beam combiner 1 17 after reflection and reaches the temperature control probe 1, so that the temperature control probe 1 can capture the temperature change on the pad and achieve temperature monitoring. Because it only passes through one lens, the error of temperature measurement can be minimized to the greatest extent, making temperature control more accurate. The visible light shines on the beam combiner 17, penetrates the beam combiner 3 23 after reflection, and shines on the beam combiner 2 22, and then is reflected by the beam combiner 22 into the imaging lens 12 to complete the real-time imaging of the welding process.

[0043] The utility model discloses an optical path system for temperature closed-loop control of the welding head, wherein the temperature control probe for measuring temperature is vertically installed above the welding material, and a beam combining mirror is used to realize real-time monitoring of the welding material, thereby ensuring the accuracy of the real-time temperature to the greatest extent.

[0044] Three sets of beam-combining mirrors are installed in parallel, and the temperature control probe is installed vertically to the welding material. Real-time monitoring of the welding part is achieved through a beam-combining mirror, which minimizes the temperature measurement error caused by multiple reflections and increases the temperature measurement accuracy during the welding process.

[0045] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly referring to the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0046] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection: it can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood by specific circumstances.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A laser welding head temperature closed-loop control optical path system, comprising a bottom main support seat (7), a main support seat (11) and a QBH optical fiber connector (14), wherein the bottom of the QBH optical fiber connector (14) is mounted on the top of the main support seat (11) through a QBH support seat (13), and the main support seat (11) is mounted on the bottom main support seat (7); Features: A temperature control fixing frame (4) is installed on the left side of the main support seat (11), a temperature control support frame (3) is installed on the temperature control fixing frame (4), a temperature control base (2) is installed on the temperature control support frame (3), a temperature control probe (1) is installed on the temperature control base (2), and the temperature control probe (1) is located directly above the molten pool (27).

2. The laser welding head temperature closed-loop control optical path system according to claim 1, characterized in that: The collimating lens group (16) is installed on the inner side of the top of the main support seat (11) with the convex surface facing downward, and the QBH optical fiber connector (14) is located directly above the collimating lens group (16). A focusing lens (18) and a protective lens (20) are installed in sequence from top to bottom on the inner side of the bottom of the main support seat (11), and the temperature control probe (1) is located directly above the focusing lens (18). A wire feeder bracket (5) is installed on the outer side of the bottom of the main support seat (11); A CCD bracket (9) is installed on the right side of the main support seat (11), and an image lens (12) is installed on the top of the CCD bracket (9).

3. The laser welding head temperature closed-loop control optical path system according to claim 2, characterized in that: An annular blue light (6) is installed at the bottom of the wire feeder support (5), and the annular blue light (6) is located directly above the molten pool (27).

4. The laser welding head temperature closed-loop control optical path system according to claim 3, characterized in that: The bottom of the wire feeder support (5) is connected to the annular blue light (6) below via an LED connecting ring (25).

5. The laser welding head temperature closed-loop control optical path system according to claim 2, characterized in that: A beam combiner mirror 1 (17) is installed at an angle on the left side of the main support seat (11), a beam combiner mirror 3 (23) is installed at an angle on the right side of the main support seat (11), and a beam combiner mirror 2 (22) is installed at an angle on the right side of the CCD bracket (9). The beam combiner mirror 1 (17) is located directly below the temperature control probe (1), the beam combiner mirror 3 (23) is located directly below the collimating lens group (16), and the beam combiner mirror 2 (22) is located directly below the imaging lens (12).

6. The laser welding head temperature closed-loop control optical path system according to claim 5, characterized in that: A CCD bracket bottom cover (8) is installed on the CCD bracket (9) on the right side of the second beam combiner (22).

7. The laser welding head temperature closed-loop control optical path system according to claim 5, characterized in that: The inclination angles of the beam combining mirror 1 (17), the beam combining mirror 3 (23) and the beam combining mirror 2 (22) are all the same.

8. The laser welding head temperature closed-loop control optical path system according to claim 2, characterized in that: The bottom of the image lens (12) is mounted on the top of the CCD bracket (9) via a fixing ring (26), and then covered on the CCD bracket (9) with a CCD bracket cover (10).

9. The laser welding head temperature closed-loop control optical path system according to claim 2, characterized in that: The collimating lens group (16) is installed on the inner side of the top of the main support seat (11) via a collimating lens elastic pressure plate (15), and the focusing lens (18) is installed on the inner side of the bottom of the main support seat (11) via a focusing lens elastic pressure plate (19).

10. The laser welding head temperature closed-loop control optical path system according to claim 2, characterized in that: A protective mirror rotating sleeve (21) is installed on the outer side of the protective mirror (20), a rotating bracket (24) is installed on the outer side of the protective mirror rotating sleeve (21), and a wire feeder bracket (5) is installed on the outer side of the rotating bracket (24).

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