A laser welding device for vacuum environment of medium and large-sized rectangular waveguide components of various sizes

Abstract

This invention provides a vacuum environment laser welding device for medium and large-sized rectangular waveguide assemblies, comprising: a vacuum welding chamber for placing test plates to be welded, having a vacuum welding chamber door and side plates, with a laser welding lens mounted on the side plates; a moving part disposed inside the vacuum welding chamber for moving the test plates to be welded to form a rectangular structure; a vacuum welding chamber flange disposed through the vacuum welding chamber for connecting a vacuum pump; and a positioner part connected to the vacuum welding chamber, including a tilting motor, a rotating motor, and a positioner bracket for supporting the tilting motor and the rotating motor. This invention effectively solves the problems of needing to open multiple drawing dies, forming weld seams in laser welding of sheet metal, and repeatedly vacuuming due to welding posture adjustments during the manufacturing process of medium and large-sized rectangular waveguide assemblies, thereby improving the product qualification rate and reducing production costs.

Description

Technical Field

[0001] This utility model relates to the field of advanced laser manufacturing technology, specifically to a laser welding device adapted to a vacuum environment for multi-size medium and large rectangular waveguide components. Background Technology

[0002] A waveguide is a hollow metal tube that achieves low-loss transmission of high-frequency signals by constraining the distribution of an electromagnetic field. Its working principle is based on the microwave cutoff effect and boundary reflection. Medium and large-sized rectangular waveguide assemblies are widely used in radar, wireless communication, and high-energy physics devices requiring high-power, low-loss, and interference-resistant transmission. The manufacturing of medium and large-sized rectangular waveguide assemblies requires consideration of dimensional accuracy, material properties, and surface quality. The mainstream processes are as follows:

[0003] For composite metal rectangular waveguide components (internal oxygen-free copper + outer stainless steel), the copper-stainless steel interface is welded in stages: the inner wall is vacuum brazed and the outer wall is argon arc welded to ensure structural strength; for large straight waveguide components, standard metal plates are used, the inner cavity is milled by a precision milling machine, and then assembled by argon arc welding or electron beam welding.

[0004] Currently, the following methods are used for medium and large rectangular waveguide components:

[0005] Dedicated vacuum welding chamber + fixture: Designed vacuum welding furnace, fixture and brazing filler metal sheet to adapt to the weld shape for rectangular waveguide components of specific size. The welding process usually requires manual or semi-automatic assembly of workpiece and solder using specific fixtures, loading into the vacuum welding furnace for vacuum welding.

[0006] General-purpose laser welding equipment + simple vacuum welding chamber: A simple, limited-size vacuum welding chamber or local atmosphere protection device is added to a general-purpose laser welding platform, along with general-purpose or simple welding fixtures.

[0007] Solutions with limited automation: Some solutions may integrate some automated loading and unloading or positioning functions, but there are obvious bottlenecks in terms of multi-size adaptability and welding clamping time.

[0008] Patent application number 202410051173.X discloses a vacuum laser welding device and welding method. This device has two technical problems:

[0009] 1. A fixed laser welding torch emits a laser beam that passes through a circular lens and acts on a specific welding position, thus limiting the welding range.

[0010] 2. The cover needs to be removed, the flat welding station or horizontal welding assembly on the moving component replaced, the workpiece to be welded placed and clamped, and then the cover sealed to the box body. This only accommodates flat and horizontal welding positions, and the cover removal and assembly are time-consuming and cumbersome. The efficiency of establishing and maintaining a vacuum environment is low. Every time the laser welding position or welding fixture is adjusted, the workpiece or fixture must be removed, and the vacuum must be re-evacuated, with the vacuuming time accounting for a large proportion of the entire production cycle. This results in high energy consumption and severely limits production efficiency. Utility Model Content

[0011] This invention was developed to solve the above-mentioned problems, and its purpose is to provide a laser welding device for multi-size medium and large rectangular waveguide components in a vacuum environment.

[0012] This utility model provides a laser welding device for vacuum environments of medium and large-sized rectangular waveguide components, characterized by: a vacuum welding chamber for placing test plates to be welded, having a vacuum welding chamber door and a vacuum welding chamber side plate, with a laser welding lens for transmitting the laser beam on the side plate; a moving part disposed inside the vacuum welding chamber for moving the test plates to be welded to form a rectangular structure for easy laser welding; a vacuum welding chamber flange disposed through the vacuum welding chamber for connecting a vacuum pump to evacuate the vacuum welding chamber; and a positioner part connected to the vacuum welding chamber, including a tilting motor for tilting the vacuum welding chamber, a rotating motor for rotating the vacuum welding chamber, and a positioner bracket for supporting the tilting motor and the rotating motor.

[0013] The laser welding device for adapting to vacuum environments of medium and large rectangular waveguide components of various sizes provided by this utility model may also have the following features: the vacuum welding chamber door is provided with a quick-opening device and a vacuum welding chamber door rotation shaft, which are used to realize the rapid opening and sealing closure of the vacuum welding chamber door.

[0014] The vacuum environment laser welding device for adapting to medium and large rectangular waveguide components of various sizes provided by this utility model may also have the following features: wherein the moving part includes: a plurality of outer movable linear slide mechanisms, which are set on the outer side of the test plate to be welded, for initially clamping and positioning the test plate to be welded; and an inner retractable right-angle positioning mechanism, which is set on the inner side of the test plate to be welded, for further accurately positioning the rectangular structure formed by the test plate to be welded.

[0015] The vacuum environment laser welding device for adapting to medium and large rectangular waveguide components of various sizes provided by this utility model may also have the following features: the outer movable linear slide mechanism includes: a linear slide stepper motor, a linear threaded screw, a linear slide rod, a linear slide support, a first distance sensor, a limit sensor, a slide displacement sensor, a vacuum chuck for adsorbing and clamping the test plate to be welded, and a telescopic push rod for adjusting the position of the vacuum chuck.

[0016] The vacuum environment laser welding device for adapting to medium and large rectangular waveguide components of various sizes provided by this utility model may also have the following features: a linear threaded screw and a linear slide rod are fixedly connected to a linear slide support; a linear slide stepper motor drives the linear threaded screw to move the linear slide support on the linear slide rod; a limit sensor is used to limit the position of the linear slide support; and a slide displacement sensor is used to further monitor the position of the linear slide support.

[0017] The laser welding device for adapting to vacuum environment of medium and large rectangular waveguide components of various sizes provided by this utility model may also have the following features: wherein, the telescopic push rod is slidably connected to the linear slide support, the vacuum chuck is set on the telescopic push rod and moves its position with the extension and retraction of the telescopic push rod, thereby initially positioning the test plate to be welded, and the first distance sensor is set on the telescopic push rod to monitor the position of the vacuum chuck.

[0018] The vacuum environment laser welding device for adapting to medium and large rectangular waveguide components of various sizes provided by this utility model may also have the following features: the inner retractable right-angle positioning mechanism includes a cross support base unit, which is set inside the vacuum welding box; a central shaft unit, which is set on the cross support base unit; and several retractable motor push rod units, which are set on the periphery of the central shaft unit for pressing the test plate to be welded.

[0019] The vacuum environment laser welding device for adapting to medium and large rectangular waveguide components of various sizes provided by this utility model may also have the following features: the telescopic motor push rod unit includes several right-angle positioning angle irons, several electric push rods for driving the right-angle positioning angle irons, and several second distance sensors for monitoring the position of the right-angle positioning angle irons.

[0020] The vacuum environment laser welding device for adapting to medium and large rectangular waveguide components of various sizes provided by this utility model may also have the following features: there are eight movable linear slide mechanisms on the outer side, namely four upper movable linear slide mechanisms on the outer side and four lower movable linear slide mechanisms on the outer side; there are eight telescopic motor push rod units, namely four upper telescopic motor push rod units and four lower telescopic motor push rod units; and there are eight test plates to be welded, namely four upper test plates to be welded forming a rectangle and four lower test plates to be welded forming a rectangle.

[0021] The laser welding device for adapting to vacuum environments of medium and large rectangular waveguide components provided by this utility model may also have the following features: the laser welding lens is shaped like an "I" and is used to transmit the laser beam to achieve laser welding in a vacuum environment, thereby welding the upper test plate and the lower test plate to be welded.

[0022] Functions and effects of utility models

[0023] The laser welding device for vacuum environment of medium and large rectangular waveguide components according to this utility model effectively solves the problems of needing to open multiple drawing dies, forming weld seams in laser welding of sheet metal, and repeatedly vacuuming due to welding posture adjustment in the manufacturing process of medium and large rectangular waveguide components, thereby improving the product qualification rate and reducing production costs. Specifically, it can achieve:

[0024] In the manufacturing process of medium and large rectangular waveguides of various sizes, it is not necessary to develop a specific drawing mold for different sizes.

[0025] Achieving high-quality laser splicing and welding of aluminum alloy, copper, stainless steel and other sheet materials in a vacuum environment with adaptive clamping.

[0026] In the laser welding process of rectangular waveguide components, there is no need to repeatedly open and close the vacuum chamber door and clamp the rectangular waveguide components to adjust the welding posture.

[0027] Achieve various sizes of medium and large rectangular waveguide assemblies: flanges and rectangular waveguides can be assembled in a single clamping operation using laser welding in a vacuum environment. Attached Figure Description

[0028] Figure 1 This is a perspective view of a laser welding device adapted to a vacuum environment for multi-sized medium and large rectangular waveguide components, as described in an embodiment of this utility model.

[0029] Figure 2 This is a top view of a laser welding device for vacuum environments adapted to multi-size medium and large rectangular waveguide components, as described in an embodiment of this utility model.

[0030] Figure 3 This is a schematic diagram of the moving part inside the vacuum welding box in an embodiment of this utility model.

[0031] Figure 4 This is a schematic diagram of the outer movable linear slide mechanism in an embodiment of this utility model.

[0032] Figure 5 This is a schematic diagram of the structure of the first distance sensor in an embodiment of this utility model.

[0033] Figure 6This is a schematic diagram of the inner retractable right-angle positioning mechanism in an embodiment of this utility model.

[0034] Figure 7 This is a schematic diagram of the retractable motor push rod unit in an embodiment of this utility model.

[0035] Explanation of reference numerals in the attached figures

[0036] 100-Laser welding device for vacuum environment of medium and large-sized rectangular waveguide components; 10-Test plate to be welded; 20-Vacuum welding box section; 21-Vacuum welding box door; 22-Vacuum welding box side plate; 23-Laser welding lens; 24-Quick opening device; 25-Vacuum welding box door rotating shaft; 30-Vacuum welding box flange section; 40-Positioner section; 41-Tilting motor; 42-Rotating motor; 43-Positioner bracket; 50-Moving part; 51-Outer movable linear slide mechanism; 52-Inner retractable right-angle positioning mechanism; 53-Linear slide stepper motor; 54-Linear threaded screw. 55-Linear slide bar, 56-Linear slide table support, 57-First distance sensor, 58-Limit sensor, 59-Vacuum suction cup, 60-Retractable push rod, 61-Cross support base unit, 62-Central shaft unit, 63-Retractable motor push rod unit, 64-Right angle positioning iron, 65-Electric push rod, 66-Second distance sensor, 67-Upper outer movable linear slide table mechanism, 68-Lower outer movable linear slide table mechanism, 69-Upper retractable motor push rod unit, 70-Lower retractable motor push rod unit, 71-Central shaft motor push rod, 72-Slide table displacement sensor. Detailed Implementation

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments, in conjunction with the accompanying drawings, provide a detailed description of the laser welding device for multi-size medium and large rectangular waveguide components in a vacuum environment.

[0039] Figure 1 This is a perspective view of a laser welding device adapted to a vacuum environment for multi-sized medium and large rectangular waveguide components, as described in an embodiment of this utility model. Figure 2This is a top view of a laser welding device for vacuum environments adapted to multi-size medium and large rectangular waveguide components, as described in an embodiment of this utility model.

[0040] like Figure 1-2 As shown, the vacuum environment laser welding device 100 for adapting to medium and large rectangular waveguide components of various sizes in this embodiment includes: a vacuum welding box section 20, a vacuum welding box flange section 30, a positioner section 40, and a moving section 50.

[0041] The vacuum welding chamber 20 is used to place the test plate 10 to be welded. It has a vacuum welding chamber door 21 and a vacuum welding chamber side plate 22. A laser welding lens 23 for transmitting a laser beam is provided on the side plate 22. The laser welding lens 23 is in the shape of an "I" and is used to transmit the laser beam to achieve laser welding in a vacuum environment, thereby welding the upper test plate 10 and the lower test plate 10 to be welded.

[0042] In this embodiment, there are eight test plates 10 to be welded, namely four upper test plates 10 forming a rectangle and four lower test plates 10 forming a rectangle.

[0043] The vacuum welding chamber door 21 is equipped with a quick-opening device 24 and a vacuum welding chamber door rotating shaft 25, which are used to realize the quick opening and sealing closure of the vacuum welding chamber door 21.

[0044] Figure 3 This is a schematic diagram of the moving part inside the vacuum welding box in an embodiment of this utility model. Figure 4 This is a schematic diagram of the outer movable linear slide mechanism in an embodiment of this utility model. Figure 5 This is a schematic diagram of the structure of the first distance sensor in an embodiment of this utility model. Figure 6 This is a schematic diagram of the inner retractable right-angle positioning mechanism in an embodiment of this utility model. Figure 7 This is a schematic diagram of the retractable motor push rod unit in an embodiment of this utility model.

[0045] like Figures 3-7 As shown, the moving part 50 is disposed inside the vacuum welding box part 20 and is used to move the test plate 10 to be welded so that it forms a rectangular structure, which facilitates laser welding.

[0046] The moving part 50 includes: eight outer movable linear slide mechanisms 51 and an inner retractable right-angle positioning mechanism 52.

[0047] The eight outer movable linear slide mechanisms 51 are four upper outer movable linear slide mechanisms 67 and four lower outer movable linear slide mechanisms 68.

[0048] Eight externally movable linear slide mechanisms 51 are respectively arranged on the outside of eight test plates 10 to be welded, and are used for initial clamping and positioning of the test plates 10 to be welded.

[0049] The outer movable linear slide mechanism 51 includes: a linear slide stepper motor 53, a linear threaded screw 54, a linear slide rod 55, a linear slide support 56, a first distance sensor 57, a limit sensor 58, a slide displacement sensor 72, a vacuum chuck 59 for adsorbing and clamping the test plate 10 to be welded, and a telescopic push rod 60 for adjusting the position of the vacuum chuck 59.

[0050] The linear screw 54 and the linear slide bar 55 are fixedly connected to the linear slide support 56. The linear slide stepper motor 53 drives the linear screw 54, causing the linear slide support 56 to move on the linear slide bar 55. The limit sensor 58 is used to limit the position of the linear slide support 56, and the slide displacement sensor 72 is used to further monitor the position of the linear slide support 56.

[0051] The telescopic push rod 60 is slidably connected to the linear slide support 56. The vacuum chuck 59 is set on the telescopic push rod 60 and moves with the telescopic push rod 60 to initially position the test plate 10 to be welded. The first distance sensor 57 is set on the telescopic push rod 60 to monitor the position of the vacuum chuck 59.

[0052] An inner retractable right-angle positioning mechanism 52 is provided on the inner side of the test plate 10 to be welded, for further precise positioning of the rectangular structure formed by the test plate 10 to be welded.

[0053] The inner retractable right-angle positioning mechanism 52 includes a cross support base unit 61, a central shaft unit 62, and eight retractable motor push rod units 63.

[0054] The cross-shaped support base unit 61 is located inside the vacuum welding box section 20.

[0055] The central shaft unit 62 is mounted on the cross support base unit 61 and its extension and retraction are achieved through the central shaft motor push rod 71.

[0056] Eight retractable motor push rod units 63 are arranged around the central shaft unit 62, and are used to press against eight test plates 10 to be welded. They include several right-angle positioning angle irons 64, several electric push rods 65 for driving the right-angle positioning angle irons 64, and several second distance sensors 66 for monitoring the position of the right-angle positioning angle irons 64.

[0057] The eight telescopic motor push rod units 63 are four upper telescopic motor push rod units 69 and four lower telescopic motor push rod units 70.

[0058] A flange 30 of the vacuum welding box is disposed through the vacuum welding box 20 for connecting a vacuum pump, thereby evacuating the vacuum welding box 20.

[0059] The positioner unit 40 is connected to the vacuum welding box unit 20 and includes a flipping motor 41 for flipping the vacuum welding box unit 20, a rotating motor 42 for rotating the vacuum welding box unit 20, and a positioner bracket 43 for supporting the flipping motor 41 and the rotating motor 42.

[0060] In this embodiment, the method of using the laser welding device 100 adapted to vacuum environments for multi-size medium and large rectangular waveguide components specifically includes the following steps:

[0061] (1) Open the vacuum welding chamber door 21 and put in the test plate 10 to be welded.

[0062] (2) Move the test plate 10 to be welded by the moving part 50 to form a rectangular structure, and the joint of the test plate 10 to be welded corresponds to the position of the laser welding lens 23.

[0063] (3) Close the vacuum welding box door 21 and evacuate the vacuum welding box 20 by using the vacuum pump and the vacuum welding box flange 30.

[0064] (4) Turn on the laser beam so that it passes through the laser welding lens 23 and weld the test plate 10 to be welded.

[0065] (5) The flipping angle of the vacuum welding box 20 is controlled by the flipping motor 41, and the rotation speed of the vacuum welding box 20 is controlled by the rotary motor 42. The laser welding head mounted on the actuator moves in coordination to achieve full coverage of the weld seams of the lower rectangular splicing structure and the upper rectangular splicing structure.

[0066] The role and effect of the embodiments

[0067] This embodiment, through the cooperation of the outer movable linear slide mechanism and the inner retractable right-angle positioning mechanism, can achieve adaptive fastening clamping of multi-size test plates to be welded into rectangular waveguide components.

[0068] This embodiment, through the cooperation of the telescopic motor push rod unit and the outer movable linear slide mechanism, can realize the docking of the upper and lower rectangular waveguide components / rectangular waveguide components and the flange.

[0069] This embodiment, through the combined use of a flip motor and a rotary motor, enables the creation of a vacuum environment in a single clamping operation, allowing for the welding of all weld seams of the waveguide assembly.

[0070] This embodiment uses a quick-opening device to enable the vacuum welding box door to open and close quickly and seal tightly, significantly improving the operation speed.

[0071] In this embodiment, the outer movable linear slide mechanism is used to initially position the test plate to be welded, and the inner retractable right-angle positioning mechanism is used to precisely position the test plate to be welded, so that the assembly of the test plate to be welded is more compact and orderly, which is conducive to the subsequent welding process.

[0072] This invention, through the setting of the "I"-shaped laser welding lens, is more suitable for the weld seams of the eight test plates to be welded in this embodiment compared with traditional laser welding lenses.

[0073] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A laser welding device for vacuum environments suitable for medium and large-sized rectangular waveguide components of various sizes, characterized in that, include: The vacuum welding chamber is used to place the test plate to be welded. It has a vacuum welding chamber door and a vacuum welding chamber side plate. The side plate of the vacuum welding chamber is provided with a laser welding lens for transmitting the laser beam. A movable part, located inside the vacuum welding chamber, is used to move the test plate to be welded so that it forms a rectangular structure, which facilitates laser welding. A flange portion of the vacuum welding chamber is provided through the vacuum welding chamber for connecting a vacuum pump, thereby evacuating the vacuum welding chamber; and The positioner unit, connected to the vacuum welding box unit, includes a flipping motor for flipping the vacuum welding box unit, a rotating motor for rotating the vacuum welding box unit, and a positioner bracket for supporting the flipping motor and the rotating motor.

2. The laser welding device for vacuum environment of multi-size medium and large rectangular waveguide components according to claim 1, characterized in that: in, The vacuum welding chamber door is equipped with a quick-opening device and a vacuum welding chamber door rotating shaft to enable the vacuum welding chamber door to open quickly and close sealed.

3. The laser welding device for vacuum environment of multi-size medium and large rectangular waveguide components according to claim 2, characterized in that: in, The moving part includes: Several externally movable linear slide mechanisms are disposed on the outer side of the test plate to be welded, for initially clamping and positioning the test plate; and An inner retractable right-angle positioning mechanism is provided on the inner side of the test plate to be welded, for further precise positioning of the rectangular structure formed by the test plate to be welded.

4. The laser welding device for vacuum environment of multi-size medium and large rectangular waveguide components according to claim 3, characterized in that: in, The outer movable linear slide mechanism includes: a linear slide stepper motor, a linear threaded screw, a linear slide rod, a linear slide support, a first distance sensor, a limit sensor, a slide displacement sensor, a vacuum chuck for adsorbing and clamping the test plate to be welded, and a retractable push rod for adjusting the position of the vacuum chuck.

5. The laser welding device for vacuum environment of multi-size medium and large rectangular waveguide components according to claim 4, characterized in that: in, The linear threaded screw and the linear slide rod are fixedly connected to the linear slide support. The linear slide stepper motor drives the linear threaded screw, causing the linear slide support to move on the linear slide rod. The limit sensor is used to limit the position of the linear slide support, and the slide displacement sensor is used to further monitor the position of the linear slide support.

6. The laser welding device for vacuum environment of multi-size medium and large rectangular waveguide components according to claim 4, characterized in that: in, The retractable push rod is slidably connected to the linear slide support, and the vacuum suction cup is mounted on the retractable push rod. The vacuum suction cup moves with the extension and retraction of the retractable push rod to initially position the test plate to be welded. The first distance sensor is mounted on the retractable push rod to monitor the position of the vacuum suction cup.

7. The laser welding device for vacuum environment of multi-size medium and large rectangular waveguide components according to claim 4, Its features are: The inner retractable right-angle positioning mechanism includes: A cross-shaped support base unit is disposed inside the vacuum welding chamber. a central shaft unit, arranged on the cross support base unit; and a plurality of telescopic electric push rod units, arranged on the peripheral side of the central shaft unit, and configured to tightly push against the test plate to be welded.

8. The multi-size adaptable vacuum environment laser tailor-welding apparatus for medium and large-sized rectangular waveguide assemblies according to claim 7, characterized in that: in, the telescopic electric push rod unit comprises a plurality of right-angle positioning angle irons, a plurality of electric push rods for driving the right-angle positioning angle irons, and a plurality of second distance sensors for monitoring positions of the right-angle positioning angle irons.

9. The multi-size adaptable vacuum environment laser tailor-welding apparatus for medium and large-sized rectangular waveguide assemblies according to claim 8, characterized in that: in, the outer movable linear sliding table mechanisms are eight in total, which are four upper outer movable linear sliding table mechanisms and four lower outer movable linear sliding table mechanisms respectively, the telescopic electric push rod units are eight in total, which are four upper telescopic electric push rod units and four lower telescopic electric push rod units respectively, the test plates to be welded are eight in total, which are four upper test plates to be welded that form a rectangle and four lower test plates to be welded that form a rectangle respectively.

10. The multi-size adaptable vacuum environment laser tailor-welding apparatus for medium and large-sized rectangular waveguide assemblies according to claim 9, characterized in that: in, the laser welding lens is in an "I" shape, and is configured to transmit a laser beam to realize laser welding in a vacuum environment, so as to weld the upper test plates to be welded and the lower test plates to be welded.

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