An induction brazing device and method for a profiled guide and spray workpiece

Abstract

The application relates to an induction brazing device and an induction brazing method for a special-shaped guide-spraying workpiece, which comprise a cylinder-shaped mounting frame, a plurality of sliding blocks, a plurality of motors, a plurality of air cylinders, a plurality of connecting rings and a flexible induction brazing coil. A plurality of sliding grooves are arranged on the inner wall of the cylinder-shaped mounting frame along the axial direction. The plurality of sliding blocks are correspondingly and slidingly connected in the sliding grooves, and mounting grooves are arranged on the sliding blocks. The plurality of motors are correspondingly mounted in the mounting grooves and drive the sliding blocks to move along the sliding grooves through transmission assemblies. The plurality of air cylinders are installed on the plurality of sliding blocks along the radial direction of the cylinder-shaped mounting frame. The plurality of connecting rings are correspondingly fixed on the end portions of the telescopic rods of the plurality of air cylinders. The flexible induction brazing coil is sequentially arranged in the plurality of connecting rings, and the positive and negative electrode interfaces of the flexible induction brazing coil are respectively connected with the positive and negative electrodes of a power supply. The application provides the induction brazing device and the induction brazing method for the special-shaped guide-spraying workpiece, belongs to the technical field of induction brazing, has a reasonable structure, a uniform temperature field distribution and is suitable for the induction brazing of special-shaped workpieces.

Description

Technical Field

[0001] This invention relates to an induction brazing device and method for irregularly shaped guided spray workpieces, belonging to the field of induction brazing technology. Background Technology

[0002] Induction brazing is a welding method that uses high-frequency, medium-frequency, or power-frequency induced current as a heat source. High-frequency heating is suitable for welding thin-walled pipes. Using coaxial cables and split-type induction coils, welding can be performed on-site far from the power source, making it a commonly used method for joining workpieces.

[0003] Currently, induction brazing commonly uses a fixed, non-deformable, circular closed induction brazing coil to induction braze the workpiece. While this method offers high production efficiency, for workpieces that need brazing and are fixed at both ends, the workpiece is difficult to disassemble, hindering convenient workpiece clamping and removal. Furthermore, induction brazing requires a uniform temperature field; otherwise, a large heat-affected zone will form on the workpiece surface, affecting the joint's performance. For irregularly shaped workpieces, traditional fixed-shape induction brazing coils cannot perform uniform brazing on workpieces of different shapes. Due to the uneven distribution of the induction temperature field, the brazing effect of the induction brazed joint is poor, affecting the joint's forming quality and limiting its adaptability.

[0004] Patent CN103506726A provides an induction coil for induction brazing, which welds sleeves with a stepped structure. The induction coil of this device is a fixed circle, which cannot achieve induction brazing of irregular structural parts. Patent CN114871526A provides an automated opening and closing induction brazing device, which achieves high positional accuracy induction brazing by controlling the high-precision fit of the end faces of two metal rods through a lead screw. However, the coil in this device is a fixed device and can only achieve induction brazing of circular components. Patent CN208051101U provides a flexible connection medium-frequency induction sensor for induction brazing, which allows the angle to be freely adjusted through a flexible device, thereby achieving full contact between the induction sensor and the workpiece during the brazing process. However, its maximum bending angle is 90°, which makes it difficult to achieve complete envelopment and circumference for workpieces with pointed shapes.

[0005] Therefore, how to design an induction brazing system with a reasonable structure, uniform temperature field distribution, and suitable for irregularly shaped workpieces is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an induction brazing device for irregularly shaped workpieces, which has a simple structure, uniform temperature field distribution, and is suitable for induction brazing of irregularly shaped workpieces.

[0007] The technical solution of this invention to solve the above-mentioned technical problems is as follows: An induction brazing device for irregularly shaped guided spray workpieces, comprising: A cylindrical mounting bracket, wherein the inner wall of the cylindrical mounting bracket is provided with multiple sliding grooves arranged along its axial direction; Multiple sliders are slidably connected to the slide groove, and each slider has a mounting groove. Multiple motors are installed in the mounting slots and drive the slider to move along the slots via a transmission assembly. Multiple cylinders are mounted radially on the slider along the cylindrical mounting bracket; Multiple connecting rings are fixed to the ends of the telescopic rods of the multiple cylinders. A flexible induction brazing coil, wherein the flexible induction brazing coil is sequentially threaded through a plurality of connecting rings and its positive and negative terminals are respectively connected to the positive and negative terminals of a power supply. The controller is electrically connected to the motor, the cylinder and the power supply respectively.

[0008] The beneficial effects of this invention are as follows: a flexible induction brazing coil is strung on multiple connecting rings at once, and the positive and negative terminals of the flexible induction brazing coil are respectively connected to a power source. The welding points of two workpieces to be welded are aligned and placed in a cylindrical mounting bracket. A motor drives a slider to move up and down along a slide groove to control the vertical position of the flexible induction brazing coil. An air compressor is connected to a cylinder, and a controller is electrically connected to the air compressor. The cylinder drives the connecting rings to move radially to control the horizontal position of the flexible induction brazing coil. This allows the flexible induction brazing coil to be arranged in a conformal manner with the welding position and to maintain an equal distance from the welding position. This ensures that the outer periphery of the welding position is at the same temperature and environment, thus improving the welding effect.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the opening of the mounting groove faces the inner wall of the slide groove; the transmission assembly includes a drive gear and a rack, the rack is mounted on the inner wall of the slide groove, the drive gear is mounted on the output shaft of the motor, and the drive gear extends out from the opening of the mounting groove and is connected to the rack in a transmission manner.

[0011] The beneficial effect of adopting the above-mentioned further solution is that the motor drives the drive gear to rotate, the drive gear is connected to the rack and pinion transmission, and drives the slider to move on the slide groove.

[0012] Furthermore, the flexible induction brazing coil includes a locking member, a brazing induction wire, and insulating rubber wrapped around its surface. The brazing induction wire is locked by the locking member, and the positive and negative terminals of the induction wire are respectively connected to the positive and negative terminals of the power supply.

[0013] The advantage of adopting the above-mentioned further solution is that the locking element can be a snap-fit.

[0014] Furthermore, it also includes a temperature sensor, which is installed on the inner wall of the cylindrical mounting bracket and is electrically connected to the controller.

[0015] The beneficial effects of adopting the above-mentioned further solution are: it can be used to monitor the temperature of the position to be welded, keep it at the optimal welding temperature, and improve the welding quality.

[0016] Furthermore, it also includes an infrared ranging sensor, which is installed on the side of the connecting ring near the workpiece to be welded, and the infrared ranging sensor is electrically connected to the controller.

[0017] The beneficial effects of adopting the above-mentioned further scheme are: monitoring the distance between the brazing induction line and the position to be welded, ensuring that the distance between the brazing induction line and the position to be welded is equal, ensuring that the temperature of the position to be welded is the same, ensuring that the surface is heated evenly, avoiding the generation of welding defects, and improving the welding quality.

[0018] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: an induction brazing method, specifically including the following steps: S1: Clean the two workpieces to be welded with alcohol; S2: Place a brazing ring or apply brazing filler metal at the welding positions of the two workpieces to be welded; S3: Select the appropriate length of the flexible induction brazing coil according to the size of the workpiece to be welded; S4: One workpiece to be welded is installed on the worktable, and another workpiece to be welded is aligned with the first workpiece by a robotic arm. The power is turned on, the cylinder adjusts the distance between the flexible induction brazing coil and the position to be welded, and the motor drives the slider to move along the slide groove so that the flexible induction brazing coil surrounds the outer periphery of the position to be welded. S5: If multiple places on the same workpiece need to be brazed, repeat steps S1 to S4. S6: Brazing is complete. Remove the workpiece and repeat steps S1 to S5 to complete the welding of the workpiece.

[0019] Furthermore, in step S2, when the pipe fitting and flange are workpieces to be welded, the joint is a sleeve type.

[0020] The beneficial effect of adopting the above-mentioned further solutions is that the connection is more stable.

[0021] Furthermore, in step S4, the distance between the flexible induction brazing coil and the position to be brazed is equal.

[0022] Furthermore, in step S5, by detecting multiple welding positions on the same workpiece, adjusting the slider and the cylinder, the flexible induction brazing coil is wrapped around the outer periphery of the welding position to achieve welding at multiple welding positions. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the operation of an induction brazing device for irregularly shaped sprayed workpieces according to the present invention. Figure 2 This is a schematic diagram of the structure of the flexible induction brazing coil and the workpiece to be welded in an induction brazing device for irregularly shaped sprayed workpieces according to the present invention. Figure 3 for Figure 1 Top view; Figure 4 This is a schematic diagram of another embodiment of the induction brazing device for irregularly shaped sprayed workpieces according to the present invention. Figure 5 This is a schematic diagram of another embodiment of the flexible induction brazing coil and the workpiece to be welded in an induction brazing device for irregularly shaped guided spray workpieces according to the present invention. Figure 6 This is a schematic diagram of another embodiment of the induction brazing device for irregularly shaped sprayed workpieces according to the present invention. Figure 7 This is a schematic diagram of another embodiment of the flexible induction brazing coil and the workpiece to be welded in an induction brazing device for irregularly shaped guided spray workpieces according to the present invention. Figure 8 This is a schematic diagram of the drive mechanism, drive gear, and infrared ranging sensor in an induction brazing device for irregularly shaped sprayed workpieces according to the present invention. Figure 9 for Figure 8 A sectional view; Figure 10 This is a schematic diagram of the flexible induction brazing coil in an induction brazing device for irregularly shaped sprayed workpieces according to the present invention. Figure 11 for Figure 10 Enlarged view of part A in the middle.

[0024] The attached diagram lists the components represented by each number as follows: 1-Cylindrical mounting bracket, 2-Slide groove, 3-Slider, 4-Flexible induction brazing coil, 41-Brazing induction wire, 42-Insulating rubber, 5-Drive gear, 6-Temperature sensor, 7-Infrared ranging sensor, 8-Connecting ring, 9-Cylinder. Detailed Implementation

[0025] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0026] The purpose of this invention is to provide an induction brazing device for irregularly shaped workpieces, which solves the problems existing in the prior art. It has a reasonable structure, uniform temperature field distribution, and is suitable for induction brazing of irregularly shaped workpieces.

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] This invention provides an induction brazing device for irregularly shaped sprayable workpieces, such as... Figures 1-11 As shown, the device includes a cylindrical mounting frame 1, multiple sliders 3, multiple motors, multiple cylinders 9, multiple connecting rings 8, a flexible induction brazing coil 4, and a controller. The inner wall of the cylindrical mounting frame 1 has multiple axially arranged grooves 2. Multiple sliders 3 are slidably connected within the grooves 2, and each slider 3 has a mounting slot. Multiple motors are installed within the mounting slots and drive the sliders 3 to move along the grooves 2 via a transmission assembly. Multiple cylinders 9 are radially mounted on the sliders 3. Multiple connecting rings 8 are fixed to the ends of the telescopic rods of the cylinders 9. The flexible induction brazing coil 4 is sequentially threaded through the connecting rings 8, and its positive and negative terminals are connected to the positive and negative terminals of a power supply, respectively. The controller is electrically connected to the motors, cylinders 9, and power supply.

[0029] The induction brazing device for irregularly shaped sprayable workpieces provided by this invention has a flexible induction brazing coil 4 connected in series with multiple connecting rings 8, such as... Figure 11 As shown, the two ends of the flexible induction brazing coil 4 are connected to the positive and negative terminals of the power supply. The welding points of the two workpieces to be welded are aligned and placed in the cylindrical mounting bracket 1. The motor drives the slider 3 to move up and down along the slide groove 2 to control the position of the flexible induction brazing coil 4 in the vertical direction. The air compressor is connected to the cylinder 9, and the controller is electrically connected to the air compressor. The cylinder 9 drives the connecting ring 8 to move radially to control the position of the flexible induction brazing coil 4 in the horizontal direction. This allows the flexible induction brazing coil 4 to be arranged in a conformal manner with the position to be welded and to maintain an equal distance from the position to be welded. This ensures that the outer periphery of the position to be welded is in the same temperature and environment, improving the welding effect.

[0030] In one specific embodiment of the present invention, the opening of the mounting groove faces the inner wall of the slide groove 2; the transmission assembly includes a drive gear 5 and a rack, the rack is mounted on the inner wall of the slide groove 2, the drive gear 5 is mounted on the output shaft of the motor, and part of the drive gear 5 extends out from the opening of the mounting groove and is connected to the rack for transmission.

[0031] The motor drives the drive gear 5 to rotate, and the drive gear 5 is connected to the rack and pinion drive, which drives the slider 3 to move on the slide groove 2.

[0032] In one specific embodiment of the present invention, the flexible induction brazing coil 4 includes a locking member, a brazing induction wire 41, and an insulating rubber 42 wrapped around its surface. The brazing induction wire 41 is locked by the locking member and the positive and negative terminals of the induction wire are respectively connected to the positive and negative terminals of the power supply.

[0033] The locking element can be a snap-fit.

[0034] In one specific embodiment of the present invention, a temperature sensor 6 is also included. The temperature sensor 6 is installed on the inner wall of the cylindrical mounting bracket 1 and is electrically connected to the controller.

[0035] Used to monitor the temperature of the area to be welded, keeping it at the optimal welding temperature and improving welding quality.

[0036] In one specific embodiment of the present invention, an infrared ranging sensor 7 is also included. The infrared ranging sensor 7 is installed on the side of the connecting ring 8 near the workpiece to be welded, and the infrared ranging sensor 7 is electrically connected to the controller.

[0037] The distance between the brazing induction line 41 and the position to be welded is monitored to ensure that the distance between the brazing induction line 41 and the position to be welded is equal, thereby ensuring that the temperature of the position to be welded is the same, ensuring that the surface is heated evenly, avoiding the generation of welding defects, and improving the welding quality.

[0038] This invention provides an induction brazing method, specifically including the following steps: S1: Clean the two workpieces to be welded with alcohol; S2: Place a brazing ring or apply brazing filler metal at the welding positions of the two workpieces to be welded; S3: Select a flexible induction brazing coil of appropriate length according to the size of the workpiece to be welded; S4: Install one workpiece to be welded on the worktable, align another workpiece to be welded with the first workpiece through the robotic arm, turn on the power, adjust the distance between the flexible induction brazing coil 4 and the position to be welded by the cylinder 9, and drive the slider 3 to move along the slide groove 2 so that the flexible induction brazing coil 4 surrounds the outer periphery of the position to be welded. S5: If multiple places on the same workpiece need to be brazed, repeat steps S1 to S4. S6: Brazing is complete. Remove the workpiece and repeat steps S1 to S5 to complete the welding of the workpiece.

[0039] Use alcohol to remove oil and rust from the workpiece to be welded.

[0040] In a specific embodiment of the present invention, in step S2, when the pipe fitting and flange are workpieces to be welded, the joint is in the form of a sleeve, making the connection more stable.

[0041] In a specific embodiment of the present invention, in step S4, the distance between the flexible induction brazing coil 4 and the position to be brazed is equal.

[0042] In a specific embodiment of the present invention, in step S5, by detecting multiple welding positions on the same workpiece, adjusting the slider 3 and the cylinder 9, the flexible induction brazing coil 4 is wrapped around the outer periphery of the welding position to achieve welding of multiple welding positions.

[0043] Embodiment 1 of the present invention: like Figures 1-3 As shown, the welding gap is an irregular ring. Multiple motors drive the slider 3 to move along the slide groove 2, so that multiple connecting rings 8 are arranged along the welding gap, and the flexible induction brazing coil 4 is arranged along the welding gap. The cylinder 9 extends and retracts, controlling the distance between the connecting ring 8 and the welding gap, thereby adjusting the distance between the flexible induction brazing coil 4 and the welding gap, so that the distance between them is equal, ensuring that the temperature of the position to be welded is the same, ensuring that the surface is heated evenly and avoiding the generation of welding defects.

[0044] Embodiment 2 of the present invention: like Figures 4-5 As shown, the welding gap is elliptical. Multiple motors drive sliders 3 to move along the slide groove 2, so that multiple connecting rings 8 are arranged along the welding gap, and flexible induction brazing coils 4 are arranged along the welding gap. The cylinder 9 extends and retracts, controlling the distance between the connecting rings 8 and the welding gap, thereby adjusting the distance between the flexible induction brazing coils 4 and the welding gap, so that the distance between them is equal, ensuring that the temperature of the position to be welded is the same, ensuring that the surface is heated evenly and avoiding the generation of welding defects.

[0045] Embodiment 3 of the present invention: like Figures 6-7 As shown, the welding gap is square. Multiple motors drive sliders 3 to move along the slide groove 2, so that multiple connecting rings 8 are arranged along the welding gap, and flexible induction brazing coils 4 are arranged along the welding gap. The cylinder 9 extends and retracts, controlling the distance between the connecting rings 8 and the welding gap, thereby adjusting the distance between the flexible induction brazing coils 4 and the welding gap, so that the distance between them is equal, ensuring that the temperature of the position to be welded is the same, ensuring that the surface is heated evenly and avoiding welding defects.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An induction brazing device for irregularly shaped guided spray workpieces, characterized in that, include: A cylindrical mounting bracket (1) has multiple sliding grooves (2) arranged along its axial direction on its inner wall. Multiple sliders (3) are slidably connected in the groove (2), and the sliders (3) are provided with mounting grooves; Multiple motors are installed in the mounting slots and drive the slider (3) to move along the slide groove (2) via a transmission assembly; Multiple cylinders (9) are mounted on the slider (3) radially along the cylindrical mounting bracket (1); Multiple connecting rings (8) are fixed to the ends of the telescopic rods of the multiple cylinders (9); Flexible induction brazing coil (4), the flexible induction brazing coil (4) is sequentially inserted into multiple connecting rings (8) and its positive and negative terminals are respectively connected to the positive and negative terminals of the power supply; The controller is electrically connected to the motor, the cylinder (9) and the power supply respectively; Infrared ranging sensor (7), the infrared ranging sensor (7) is installed on the side of the connecting ring (8) close to the workpiece to be welded, and the infrared ranging sensor (7) is electrically connected to the controller; The motor drives the slider (3) to move up and down along the groove (2) to control the position of the flexible induction brazing coil (4) in the vertical direction. The air compressor is connected to the cylinder (9), and the controller is electrically connected to the air compressor. The cylinder (9) drives the connecting ring (8) to move radially to control the position of the flexible induction brazing coil (4) in the horizontal direction, so that the flexible induction brazing coil (4) is arranged to follow the shape of the position to be welded and maintains an equal distance from the position to be welded.

2. The induction brazing device for irregularly shaped guided spray workpieces according to claim 1, characterized in that, The opening of the mounting groove faces the inner wall of the slide (2); The transmission assembly includes a drive gear (5) and a rack. The rack is mounted on the inner side wall of the slide groove (2). The drive gear (5) is mounted on the output shaft of the motor. Part of the drive gear (5) extends out of the slot of the mounting groove and is connected to the rack in a transmission manner.

3. The induction brazing device for irregularly shaped guided spray workpieces according to claim 1, characterized in that, The flexible induction brazing coil (4) includes a locking member, a brazing induction wire (41), and an insulating rubber (42) wrapped around its surface. The brazing induction wire (41) is locked by the locking member and its positive and negative terminals are respectively connected to the positive and negative terminals of the power supply.

4. The induction brazing device for irregularly shaped guided spray workpieces according to claim 1, characterized in that, It also includes a temperature sensor (6), which is installed on the inner wall of the cylindrical mounting bracket (1) and is electrically connected to the controller.

5. An induction brazing method, characterized in that, The induction brazing device for irregularly shaped sprayed workpieces according to any one of claims 1 to 4 specifically includes the following steps: S1: Clean the two workpieces to be welded with alcohol; S2: Place a brazing ring or apply brazing filler metal at the welding positions of the two workpieces to be welded; S3: Select the appropriate length of the flexible induction brazing coil (4) according to the size of the workpiece to be welded; S4: Install one workpiece to be welded on the workbench, align another workpiece to be welded with the first workpiece through a robotic arm, turn on the power, the cylinder (9) adjusts the distance between the flexible induction brazing coil (4) and the position to be welded, the motor drives the slider (3) to move along the slide groove (2) so that the flexible induction brazing coil (4) surrounds the outer periphery of the position to be welded; S5: If multiple places on the same workpiece need to be brazed, repeat steps S1 to S4. S6: Brazing is complete. Remove the welded workpiece and repeat steps S1 to S5 to complete the welding of the workpiece to be welded.

6. The induction brazing method according to claim 5, characterized in that, In step S2, when the pipe fitting and flange are workpieces to be welded, the joint is a sleeve type.

7. The induction brazing method according to claim 5, characterized in that, In step S4, the distance between the flexible induction brazing coil (4) and the position to be brazed is equal.

8. The induction brazing method according to claim 5, characterized in that, In step S5, by detecting multiple welding positions on the same workpiece, adjusting the slider (3) and the cylinder (9), the flexible induction brazing coil (4) is wrapped around the outer periphery of the welding position to achieve welding of multiple welding positions.

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