High-temperature alloy part variable-speed welding equipment based on phase change detection
By using a high-temperature alloy parts variable speed welding equipment based on phase transformation detection, the precise position adjustment of the welding head is achieved by using a servo motor and ball screw. Combined with the multi-dimensional movement of the clamping and shifting mechanism, the problem of uneven heat input and alignment control in high-temperature alloy welding of traditional welding equipment is solved, and efficient and precise welding of complex welds is realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUARUI (JIANGSU) GAS TURBINE SERVICE CO LTD
- Filing Date
- 2026-03-27
- Publication Date
- 2026-05-01
AI Technical Summary
High-temperature alloys have poor weldability, and traditional welding equipment cannot adapt to the heat dissipation differences in different weld positions, resulting in insufficient or excessive heat input, causing defects such as incomplete penetration, coarse grains, and hot cracks. In addition, the lack of coordinated alignment control between the welding head and the workpiece makes it difficult to meet the all-position welding requirements of complex welds.
A high-temperature alloy parts variable speed welding equipment based on phase change detection is adopted. The ball screw driven by a servo motor achieves precise position adjustment of the welding head. Combined with the multi-dimensional movement of the clamping and shifting mechanism, the welding head and the workpiece are aligned in a coordinated manner. The integrated phase change detection module adjusts the heat input in real time to adapt to complex welds.
It achieves precise positioning and heat input control during the welding process, avoiding defects such as incomplete penetration and weld misalignment, improving welding efficiency and consistency, and adapting to the all-position welding requirements of complex welds.
Smart Images
Figure CN121945922A_ABST
Abstract
Description
A variable-speed welding device for high-temperature alloy parts based on phase transformation detection Technical Field
[0001] This invention relates to the technical field of high-end equipment manufacturing, specifically to a variable-speed welding device for high-temperature alloy parts based on phase transformation detection. Background Technology
[0002] High-temperature alloys, due to their excellent high-temperature strength, corrosion resistance, and oxidation resistance, have become the preferred materials for core components such as hot-end parts of aero-engines, gas turbine cylinder blocks, and heat transfer tubes of nuclear power plant evaporators. However, high-temperature alloys have poor weldability and suffer from problems such as low thermal conductivity, coarse grains in the heat-affected zone, susceptibility to hot cracking, and segregation of alloying elements.
[0003] Traditional welding equipment uses constant welding speed and current parameters, which cannot adapt to the different heat dissipation differences in different weld positions of high-temperature alloy parts. In corner areas where heat dissipates quickly, fixed parameters can easily lead to insufficient heat input, causing incomplete penetration defects. In planar areas where heat dissipates slowly, excessive heat input can easily cause coarse grains and hot cracks, severely reducing the high-temperature creep performance of the welded joint. Traditional equipment requires frequent manual adjustments to the workpiece or welding head posture, resulting in low welding efficiency and poor consistency. Although some automated welding equipment can achieve single-dimensional movement of the welding head or workpiece, it lacks coordinated alignment control between the welding head and workpiece, making it difficult to meet the all-position welding requirements of complex welds. Summary of the Invention
[0004] The purpose of this invention is to provide a high-temperature alloy parts variable speed welding device based on phase transformation detection, so as to solve the above-mentioned defects caused by the prior art.
[0005] A high-temperature alloy component variable-speed welding device based on phase transformation detection includes a base and a transposition box. A microcontroller control module is connected to one side of the base, and a foot pedal control module is connected to one side of the microcontroller control module via a wire. A servo motor is electrically connected to the outside of the microcontroller control module. The device is characterized by: a welding transposition mechanism configured on one side of the base, which is connected to the outside of a ball screw via a nut mounted on the outside of a transposition support on one side, to adjust the position of a sensor bracket and an arc welding head connected to its outside; a clamping transposition mechanism is arranged directly above the transposition box, which clamps the workpiece by sliding along a groove opened at the top of a material tray using symmetrically arranged clamps, while an electric cylinder drives a slider to synchronously displace the material tray and the workpiece, thereby adjusting the relative welding position with the arc welding head.
[0006] Preferably, the welding transposition mechanism includes a nut, a ball screw, a transposition bracket, a servo motor, a sensor bracket, and an arc welding head; the nut is fixed to the outside of the transposition bracket, the ball screw is threadedly connected to the nut, the servo motor is mounted on one side of the base, and the output end of the servo motor is connected to the ball screw via a coupling; a sensor bracket is provided directly above the transposition bracket, the sensor bracket is arranged on one side of the base, the arc welding head is fastened to the outside of the sensor bracket, and the sensor bracket is electrically connected to the microcontroller control module via a shielded cable.
[0007] Preferably, the shifting support is connected to the outer side of the ball screw via a nut fixed on its outer side.
[0008] Preferably, the sensor bracket is mounted on the top of the transposition support via a shaft connection, and the sensor bracket is fastened to the outer side of the arc welding head by bolts.
[0009] Preferably, the clamp, material tray, rotating shaft, stepper motor, guide rail, slider, electric cylinder, and slide groove constitute a clamping and shifting mechanism; the top of the material tray has a rectangular slide groove, the clamp slides in contact with the outer side of the slide groove, the bottom of the material tray is fixedly connected to the top of the rotating shaft, and the other end of the rotating shaft is connected to the output end of the stepper motor via a coupling; the guide rail is installed inside the shifting housing, and the top of the shifting housing has a groove adapted to the rotating shaft for the rotating shaft to move along its guide; the stepper motor is positioned directly above the guide rail.
[0010] Preferably, the stepper motor is connected to a slider via a bracket fixed to its bottom end, and the slider and the inner side of the guide rail form a sliding connection structure.
[0011] Preferably, the guide rail is connected to one side of the slider via an electric cylinder disposed on its inner side, and the electric cylinder, guide rail, and slider are all fastened together.
[0012] Compared with the prior art, the present invention has the following advantages: 1. The new invention sets up a welding shifting mechanism driven by a servo motor to rotate a ball screw, and through the threaded transmission between the nut and the shifting support, drives the arc welding head to achieve precise adjustment of linear displacement; the clamping shifting mechanism drives the workpiece to translate through an electric cylinder driven slider, and cooperates with the servo motor to drive the rotating shaft to achieve workpiece rotation, which can complete the adjustment of the relative position of the welding head and the workpiece for complex welds such as planes, curved surfaces, and rings. The positioning accuracy is guaranteed by the servo system and the ball screw transmission, effectively avoiding defects such as incomplete penetration and weld offset caused by alignment deviation.
[0013] 2. The clamping and shifting mechanism integrates linear displacement driven by an electric cylinder and rotary motion driven by a servo motor. Together with the guide groove at the top of the shifting box, it can drive the workpiece to complete multi-dimensional movements such as translation and rotation. The welding shifting mechanism achieves precise positioning of the welding head through the transmission combination of servo motor and ball screw. The dual mechanism can cover the full-position welding needs of complex welds. At the same time, the fixture slides along the rectangular slide of the material tray, which can be adapted to clamp high-temperature alloy parts of different sizes and specifications without the need to change special fixtures. Attached Figure Description
[0014] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a structural schematic diagram of the interior of the transposition box in the present invention; Figure 3 is a side view of the transposition box in the present invention; Figure 4 is a top view of the base in the present invention; Figure 5 is a side view of the base in the present invention.
[0015] The components are: 1. Base; 2. Nut; 3. Ball screw; 4. Transposition bracket; 5. Servo motor; 6. Sensor bracket; 7. Arc welding head; 8. Transposition box; 9. Fixture; 10. Material tray; 11. Rotary shaft; 12. Stepper motor; 13. Foot pedal control module; 14. Guide rail; 15. Slider; 16. Electric cylinder; 17. Microcontroller control module; 18. Slide. Detailed Implementation
[0016] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.
[0017] As shown in Figures 1 to 5, a high-temperature alloy part variable speed welding device based on phase change detection includes a base 1 and a transposition box 8. A single-chip microcomputer control module 17 is connected to one side of the base 1. A foot pedal control module 13 is connected to one side of the single-chip microcomputer control module 17 via a wire. A servo motor 5 is electrically connected to the outside of the single-chip microcomputer control module 17. A welding transposition mechanism is configured on one side of the base 1. The welding transposition mechanism is connected to the outside of the ball screw 3 via a nut 2 mounted on the outside of the transposition support 4 on one side, so as to adjust the position of the sensor bracket 6 and the arc welding head 7 connected to its outside. A clamping transposition mechanism is set on the top of the transposition box 8. The clamping transposition mechanism uses symmetrically arranged clamps 9 to slide along the slide groove 18 opened at the top of the material tray 10 to clamp the workpiece. At the same time, the electric cylinder 16 drives the slider 15 to move the material tray 10 and the workpiece synchronously, thereby adjusting the relative welding position with the arc welding head 7.
[0018] In this embodiment, the welding transposition mechanism includes a nut 2, a ball screw 3, a transposition bracket 4, a servo motor 5, a sensor bracket 6, and an arc welding head 7. The nut 2 is fixed to the outside of the transposition bracket 4, the ball screw 3 is threadedly connected to the nut 2, the servo motor 5 is mounted on one side of the base 1, and the output end of the servo motor 5 is connected to the ball screw 3 via a coupling. The sensor bracket 6 is positioned directly above the transposition bracket 4 and is located on one side of the base 1. The arc welding head 7 is fastened to the outside of the sensor bracket 6, and the sensor bracket 6 is electrically connected to the microcontroller control module 17 via a shielded cable. The transposition bracket 4 is threadedly connected to the outside of the ball screw 3 via the nut 2 fixed to its outside. The sensor bracket 6 is mounted on the top of the transposition bracket 4 via a shaft connection, and the sensor bracket 6 is fastened to the outside of the arc welding head 7 with bolts.
[0019] Among them: the electric cylinder 16 can drive the slider 15 to move the workpiece along the guide rail 14; the stepper motor 12 can drive the material tray 10 and the workpiece to rotate through the rotating shaft 11, and with the guide groove at the top of the switching box 8, the workpiece angle can be flexibly adjusted. The entire adjustment process does not require manual flipping or moving of the workpiece. The adaptation of the welding posture of complex weld seams in all positions can be completed by setting parameters.
[0020] In this embodiment, the clamp 9, material tray 10, rotating shaft 11, stepper motor 12, guide rail 14, slider 15, electric cylinder 16, and slide groove 18 constitute a clamping and shifting mechanism; the top of the material tray 10 has a rectangular slide groove 18, and the clamp 9 slides in contact with the outer side of the slide groove 18; the bottom of the material tray 10 is fixedly connected to the top of the rotating shaft 11, and the other end of the rotating shaft 11 is connected to the output end of the stepper motor 12 via a coupling; the guide rail 14 is mounted on the shifting mechanism. Inside the housing 8, the top of the switching housing 8 is provided with a groove that matches the rotating shaft 11, so that the rotating shaft 11 can move along its guide. The stepper motor 12 is arranged directly above the guide rail 14. The stepper motor 12 is connected to the slider 15 through a support fixed to its bottom end. The slider 15 and the inner side of the guide rail 14 form a sliding connection structure. The guide rail 14 is connected to one side of the slider 15 through an electric cylinder 16 provided on its inner side. The electric cylinder 16, the guide rail 14, and the slider 15 are all fastened to each other.
[0021] In this process, after the operator inputs the welding head positioning parameters through the microcontroller control module 17, the servo motor 5 drives the ball screw 3 to rotate. The thread transmission between the nut 2 and the ball screw 3 drives the shifting support 4, the sensor bracket 6 at the top, and the arc welding head 7 to complete linear displacement. This transmission method has small gaps and high positioning accuracy, and does not require manual pushing of the welding head.
[0022] In practical applications, this high-temperature alloy component variable-speed welding equipment based on phase transformation detection includes the following operations: Before welding, the operator inputs the material parameters, weld trajectory, and phase transformation critical threshold of the high-temperature alloy component to be welded through the microcontroller control module 17; simultaneously, the operator switches to automatic welding mode through the foot pedal control module 13 to complete the initial alignment of the arc welding head 7 with the workpiece; the servo motor 5 starts upon receiving the instruction from the microcontroller control module 17, and its output drives the ball screw 3 to rotate through a coupling; since the nut 2 is fixed to the outside of the shifting support 4 and threadedly connected to the ball screw 3, the rotational motion of the ball screw 3 is converted into linear motion of the shifting support 4 along the screw axis; the shifting support 4 synchronously drives the sensor connected to the top shaft. The support 6 and the arc welding head 7, secured by external bolts, move until the arc welding head 7 precisely reaches the starting position of the weld. During this process, the sensor support 6 feeds back its own position signal to the microcontroller control module 17 in real time through a shielded cable, realizing closed-loop calibration of the welding head positioning. The high-temperature alloy part is placed on the top of the material tray 10, and the symmetrically arranged clamps 9 slide along the rectangular groove 18 of the material tray 10 until the clamps 9 clamp the workpiece, ensuring that there is no displacement deviation of the workpiece during the welding process. The electric cylinder 16 receives the command from the microcontroller control module 17 and drives the slider 15, which is slidably connected to the inner side of the guide rail 14, to move along the guide rail 14. The stepper motor 12 is securely connected to the slider 15 through the bottom support, so the slider 15 synchronously drives the stepper motor. 12. The rotating shaft 11 and material tray 10 move to adjust the relative position of the workpiece and the arc welding head 7. If it is necessary to weld irregularly shaped welds on the workpiece, the stepper motor 12 starts and drives the rotating shaft 11 to rotate through the coupling. The rotating shaft 11 drives the material tray 10 and the workpiece to rotate synchronously. With the guidance of the adapter groove at the top of the transposition box 8, the weld is always within the effective welding range of the arc welding head 7. During the welding process, the phase change detection module integrated in the sensor bracket 6 collects the temperature field and phase change characteristic signals of the weld and heat-affected zone in real time, and transmits them to the microcontroller control module 17 through the shielded cable. The microcontroller control module 17 compares the collected phase change signals with the preset threshold. If it determines that the heat input is too high, it outputs an acceleration command to drive the workpiece. The electric cylinder 16 increases speed, driving the workpiece to move quickly and shortening the heating time of the electric arc in local areas. If insufficient heat input is detected and the ultrasonic signal indicates incomplete penetration, a deceleration command is output to reduce the workpiece's movement speed and ensure sufficient metallurgical bonding of the molten pool. When the automatic speed change system is dealing with complex conditions such as weld inflection points and bevel transitions, the operator can issue a higher-priority speed adjustment command through the foot pedal control module 13 to pause the automatic speed change logic and manually adjust the welding speed to avoid welding defects. After the weld is completed, the microcontroller control module 17 controls the arc welding head 7 to extinguish the arc and simultaneously drives the welding positioner to reset to its initial position. The clamp 9 holding the positioner releases, and the operator removes the welded workpiece, completing one welding cycle.
[0023] Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not exhaustive. All modifications within the scope of this invention or its equivalents are included in this invention.
Claims
1. A high-temperature alloy component variable-speed welding device based on phase transformation detection, comprising a base (1), a transposition box (8), and a single-chip microcomputer control module (17) connected to one side of the base (1), a foot pedal control module (13) connected to one side of the single-chip microcomputer control module (17) via a wire, and a servo motor (5) electrically connected to the outside of the single-chip microcomputer control module (17), characterized in that: A welding shifting mechanism is provided on one side of the base (1). The welding shifting mechanism is connected to the outer side of the ball screw (3) through the nut (2) installed on the outer side of the shifting support (4) on one side, so as to adjust the position of the sensor bracket (6) and the arc welding head (7) connected to its outer side. A clamping shifting mechanism is provided directly above the shifting box (8). The clamping shifting mechanism slides along the slide groove (18) opened at the top of the material tray (10) through symmetrically arranged clamps (9) to clamp the workpiece. At the same time, the electric cylinder (16) drives the slider (15) to drive the material tray (10) and the workpiece to move synchronously, thereby adjusting the relative welding position with the arc welding head (7).
2. The high-temperature alloy part variable speed welding equipment based on phase transformation detection according to claim 1, characterized in that: The welding transposition mechanism includes a nut (2), a ball screw (3), a transposition bracket (4), a servo motor (5), a sensor bracket (6), and an arc welding head (7). The nut (2) is fixed on the outside of the transposition bracket (4). The ball screw (3) is threadedly connected to the nut (2). The servo motor (5) is installed on one side of the base (1), and the output end of the servo motor (5) is connected to the ball screw (3) through a coupling. The sensor bracket (6) is set directly above the transposition bracket (4). The sensor bracket (6) is arranged on one side of the base (1). The arc welding head (7) is fastened to the outside of the sensor bracket (6). The sensor bracket (6) is electrically connected to the microcontroller control module (17) through a shielded cable.
3. The high-temperature alloy part variable speed welding equipment based on phase transformation detection according to claim 2, characterized in that: The shifting support (4) is connected to the outer side of the ball screw (3) by a nut (2) fixed on its outer side.
4. The high-temperature alloy part variable speed welding equipment based on phase transformation detection according to claim 3, characterized in that: The sensor bracket (6) is mounted on the top of the transposition support (4) by means of shaft connection, and the sensor bracket (6) is fastened to the outside of the arc welding head (7) by bolts.
5. A variable-speed welding device for high-temperature alloy parts based on phase transformation detection according to claim 4, characterized in that: The clamp (9), material tray (10), rotating shaft (11), stepper motor (12), guide rail (14), slider (15), electric cylinder (16) and slide groove (18) constitute a clamping and shifting mechanism; the top of the material tray (10) is provided with a rectangular slide groove (18), the clamp (9) slides in cooperation with the outside of the slide groove (18), and the bottom of the material tray (10) is fixedly connected to the top of the rotating shaft (11).
6. A high-temperature alloy parts variable-speed welding device based on phase transformation detection according to claim 5, characterized in that: The other end of the rotating shaft (11) is connected to the output end of the stepper motor (12) via a coupling; the guide rail (14) is installed inside the transposition box (8), and the top of the transposition box (8) is provided with a groove that matches the rotating shaft (11) so that the rotating shaft (11) can move along its guide; the stepper motor (12) is arranged directly above the guide rail (14).
7. A high-temperature alloy parts variable-speed welding device based on phase transformation detection according to claim 6, characterized in that: The stepper motor (12) is connected to a slider (15) via a support fixed to its bottom end. The slider (15) and the inner side of the guide rail (14) form a sliding connection structure.
8. A high-temperature alloy part variable speed welding device based on phase transformation detection according to claim 7, characterized in that: The guide rail (14) is connected to one side of the slider (15) via an electric cylinder (16) provided on its inner side. The electric cylinder (16), the guide rail (14), and the slider (15) are all fastened together.
9. A high-temperature alloy part variable speed welding device based on phase transformation detection according to claim 8, characterized in that: The operation method is as follows: Before welding, the operator inputs the material parameters, weld trajectory and phase transformation critical threshold of the high-temperature alloy part to be welded through the microcontroller control module (17); at the same time, the operator switches to the automatic welding mode through the foot pedal control module (13) to complete the initial alignment of the arc welding head (7) and the workpiece; the servo motor (5) starts after receiving the instruction from the microcontroller control module (17), and its output end drives the ball screw (3) to rotate through the coupling; since the nut (2) is fixed on the outside of the shift support (4) and is connected to the ball screw (3) by thread transmission, the rotational motion of the ball screw (3) is converted into the linear motion of the shift support (4) along the screw axis; the shift support (4) synchronously drives the sensor bracket (6) connected to the top shaft and the outer bolts to tighten. The fixed arc welding head (7) moves until it accurately reaches the starting position of the weld. During this process, the sensor bracket (6) feeds back its position signal to the microcontroller control module (17) in real time through the shielded cable to achieve closed-loop calibration of the welding head positioning. The high-temperature alloy part is placed on the top of the material tray (10), and the symmetrically arranged clamps (9) slide along the rectangular slide groove (18) of the material tray (10) until the clamps (9) clamp the workpiece to ensure that there is no displacement deviation of the workpiece during the welding process. The electric cylinder (16) receives the instruction from the microcontroller control module (17) and drives the slider (15) which is slidably connected to the inner side of the guide rail (14) to move along the guide rail (14). The stepper motor (12) is fixedly connected to the slider (15) through the bottom support. Therefore, the slider (15) synchronously drives the stepper motor (12), the rotating shaft (11) and the material tray (10) to move, thereby realizing the relative position adjustment between the workpiece and the arc welding head (7); if it is necessary to weld the irregular weld seam of the workpiece, the stepper motor (12) starts and drives the rotating shaft (11) to rotate through the coupling, and the rotating shaft (11) drives the material tray (10) and the workpiece to rotate synchronously. With the guidance of the adapter groove at the top of the transposition box (8), the weld seam is always within the effective welding range of the arc welding head (7); during the welding process, the phase change detection module integrated in the sensor bracket (6) collects the temperature field and phase change characteristic signals of the weld seam and heat-affected zone in real time, and transmits them to the microcontroller control module (17) through the shielded cable; the microcontroller control module (17) The collected phase change signal is compared with the preset threshold. If the heat input is too high, an acceleration command is output to drive the electric cylinder (16) to increase speed and move the workpiece quickly, shortening the heating time of the arc on the local area. If the heat input is insufficient and the ultrasonic signal shows that it has not melted through, a deceleration command is output to reduce the speed of the workpiece and ensure that the molten pool is fully metallurgically bonded. When the automatic speed change system is dealing with complex working conditions such as weld inflection points and bevel transitions, the operator can issue a higher priority speed adjustment command through the foot pedal control module (13) to pause the automatic speed change logic and manually adjust the welding speed to avoid welding defects. After the weld is completed, the single-chip microcomputer control module (17) controls the arc welding head (7) to extinguish the arc and drives the welding position mechanism to reset to the initial position.The clamp (9) of the clamping and shifting mechanism is released, and the operator removes the welded workpiece, completing one welding cycle.