A friction stir welding real-time temperature measuring device

Abstract

The application belongs to the technical field of welding auxiliary device, and particularly relates to a real-time temperature measuring device for friction stir welding, which comprises a welding table, support legs are fixedly installed at the lower end of the welding table at four corner positions, a fixing assembly for fixing welding materials is installed at the upper end of the welding table at the front and rear sides, a control panel is fixedly installed at the front side of the upper end of the welding table, moving grooves are formed at the left and right sides of the upper end of the welding table, moving assemblies are installed in the two moving grooves, position adjusting assemblies are installed on the two moving assemblies, angle adjusting assemblies are installed at the opposite ends of the two position adjusting assemblies, and infrared temperature detectors are fixedly installed at one side of the two angle adjusting assemblies. The application can simultaneously monitor the temperatures of a welding joint and a welding point, improves the quality of temperature monitoring, and the infrared temperature detectors are not in direct contact with heat-emitting materials, reducing the damage of the temperature measuring structure caused by high temperature.

Description

Technical Field

[0001] The invention belongs to the technical field of welding auxiliary devices, and in particular relates to a real-time temperature measuring device for friction stir welding. Background Art

[0002] Friction stir welding is a solid-phase welding technology that uses the heat generated by friction between a high-speed rotating welding tool and the workpiece to achieve material connection. A high-speed rotating stirring head is inserted into the workpiece joint, using frictional heat to soften the material and cause it to plastically deform, thereby achieving the material connection. Compared to traditional methods such as arc welding and gas shielded welding, friction stir welding technology avoids problems such as porosity and thermal cracking, while also reducing production costs and environmental pollution. Therefore, as an efficient and environmentally friendly welding technology, friction stir welding has broad application prospects. During the welding process, the temperature of the weld needs to be monitored to ensure weld quality, optimize process parameters, and improve weld quality.

[0003] For example, a Chinese utility model patent with authorization publication number CN204954154U and authorization publication date of January 13, 2016, discloses a device for measuring the temperature field during friction stir welding of magnesium alloys. The device consists of a backing plate, a workpiece, a screw-type thermocouple, a temperature collector, and a computer. To overcome the problems of unstable fixation and inaccurate temperature measurement often encountered with conventional K-type thermocouples when measuring the temperature field during friction stir welding of magnesium alloys, the present utility model employs a screw-type thermocouple temperature measurement method. A threaded hole is tapped at a pre-set temperature measurement position, and the screw-type thermocouple is then fastened within the threaded through-hole. Based on the thermocouple temperature measurement principle, the temperature inside and at the bottom of the magnesium alloy is effectively measured in real time. By connecting the temperature collector to a computer and combining it with corresponding data processing software, the temperature data during the friction stir welding process of the magnesium alloy can be displayed and monitored in real time, providing guidance for optimizing friction stir welding process parameters.

[0004] For example, a Chinese invention patent application with application publication number CN108772623A and application publication date 2018.11.09 discloses a real-time temperature measurement device for stir friction welding, comprising a stir friction welding spindle (1) and a temperature measurement unit; the temperature measurement unit comprises a thermocouple, a temperature measurement bracket (2) and a temperature measurement circuit; the temperature measurement bracket (2) is fixedly mounted on the stir friction welding spindle (1), and the temperature measurement circuit is mounted on the temperature measurement bracket (2); a temperature measurement hole is provided on the stir friction welding spindle (1), and the thermocouple is mounted in the temperature measurement hole; the device comprises one or more temperature measurement holes, and the thermocouples correspond to the temperature measurement holes one by one. The present invention also provides a temperature measurement method for using the above-mentioned real-time temperature measurement device for stir friction welding. The present invention directly embeds the thermocouple in the rotating stirring tool, and measures the temperature of the weld center by measuring the temperature of the stirring tool during welding. The distance between the thermocouple embedded in the stirring tool and the weld center is less than 1 mm, so that the weld center temperature can be accurately obtained.

[0005] For another example, a Chinese invention patent application with application publication number CN103592047A and application publication date 2014.02.19 discloses a device for measuring the temperature of the friction interface in stir friction welding, which is composed of a temperature collector, a rotary encoder, a semi-natural thermocouple, a stirring head, a computer, and data processing software. The present invention adopts a semi-natural thermocouple temperature measurement method, installs the first level of a standard thermocouple into the stirring head, and connects the natural electrode to the sample to be welded. The two electrodes are then connected to the temperature collector, and the temperature of the friction interface is measured using the thermocouple temperature measurement principle. The rotary encoder is used to record the rotation frequency of the stirring head, and in conjunction with the temperature value recorded by the temperature collector, the temperature values ​​at different friction interface positions on the horizontal plane of the measurement point are measured and separated. Through the temperature collector and the rotary encoder communicating with the computer, combined with the data processing software, the temperature data can be displayed and monitored in real time.

[0006] However, the aforementioned technical solution can only measure the temperature of the welding head or welding material during testing. In actual use, it cannot monitor the temperature of both the welding head and welding material simultaneously, making it easy for a single structure to overheat, thus affecting the quality of the weld. Furthermore, in the aforementioned technical solution, the temperature detection structure is in direct contact with the heat-generating structure, which can easily damage the temperature detection structure, thus affecting the service life and detection accuracy. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a real-time temperature measurement device for stir friction welding in response to the shortcomings of the existing technology. The present invention can simultaneously monitor the temperature of the welding head and the welding point, thereby improving the quality of temperature monitoring. In addition, the infrared temperature detector does not come into direct contact with the heating material, thereby reducing the damage of the temperature measuring structure caused by high temperature.

[0008] This solution is achieved through the following technical measures: a real-time temperature measurement device for stir friction welding, which includes a welding table, wherein support legs are fixedly installed at the four corners of the lower end of the welding table, fixing components for fixing welding materials are installed on the front and rear sides of the upper end of the welding table, a control panel is fixedly installed on the front side of the upper end of the welding table, movable grooves are opened on the left and right sides of the upper end of the welding table, movable components are installed in the two movable grooves, position adjustment components are installed on the two movable components, angle adjustment components are installed at the opposite ends of the two position adjustment components, and an infrared temperature detector is fixedly installed on one side of the two angle adjustment components.

[0009] Preferably, the fixing assembly includes two mounting plates, which are fixedly mounted at the upper corner positions of the welding table, and the two mounting plates are respectively close to the ends of the two movable grooves. A control motor is fixedly mounted on one side of one of the mounting plates, and a bidirectional threaded rod is rotatably connected between the two mounting plates, and one end of the bidirectional threaded rod is fixedly connected to the output end of the control motor. Both ends of the bidirectional threaded rod are respectively threadedly connected to an L-shaped movable plate, and the bottom of the movable plate is in sliding contact with the welding table.

[0010] Preferably, the fixing assembly also includes a mounting ring, the side walls of the mounting ring are evenly installed with multiple fixing bolts, the mounting ring is fixedly connected to the external welding head through the fixing bolts, the lower end of the mounting ring is fixedly installed with a connecting ring, the lower end of the connecting ring is symmetrically fixed with two large sleeves, a small sleeve is slidably connected in the large sleeve, a pressing spring is commonly installed inside the large sleeve and the small sleeve, and a ball presser is fixedly installed on the outer lower end of the small sleeve.

[0011] Preferably, the upper end of the movable plate is threadedly connected to a screw, the upper end of the screw is fixedly mounted with a knob, the lower end of the screw is mounted with a pressing block, the upper end of the pressing block is provided with a mounting groove with a T-shaped cross section, the lower end of the screw is fixedly connected with a mounting head with a T-shaped cross section, and the rotational mounting of the pressing block and the screw is achieved by rotating the mounting groove and the mounting head.

[0012] Preferably, the moving component includes a stepper motor and a moving threaded rod, the stepper motor is fixedly mounted on one side of the welding table, the two ends of the moving threaded rod are rotatably connected to the two ends of the moving groove, and one end of the moving threaded rod is fixedly connected to the output end of the stepper motor, a moving block is threadedly connected to the moving threaded rod, and the moving block is slidably fitted with the moving groove.

[0013] Preferably, the position adjustment component includes a sliding rod and a slow self-locking motor, the sliding rod is slidably engaged with the upper end of the moving block, the slow self-locking motor is fixedly mounted on the inner upper end of the moving block, an active bevel gear is fixedly mounted on the output end of the slow self-locking motor, a conical rack is fixedly mounted on one side of the inner upper end of the sliding rod, and the active bevel gear is meshed with the conical rack.

[0014] Preferably, the end of the sliding rod is fixedly connected to a height-adjusting slide rail, a lifting slot is provided on one side of the height-adjusting slide rail, a servo motor is fixedly installed on the outer upper end of the height-adjusting slide rail, a lifting threaded rod is rotatably connected in the lifting slot, and the upper end of the lifting threaded rod is fixedly connected to the output end of the servo motor, a lifting block is threadedly connected to the lifting threaded rod, and the lifting block slides in cooperation with the lifting slot, a horizontally retractable multi-section hydraulic self-locking push rod is fixedly installed on the side of the lifting block, and the angle adjustment component is installed at the end of the multi-section hydraulic self-locking push rod away from the lifting block.

[0015] Preferably, the angle adjustment assembly includes a rotating seat fixedly connected to the end of a multi-section hydraulic self-locking push rod, a rotating block is rotatably connected in the rotating seat, and the infrared temperature detector is fixedly installed on the side of the rotating block.

[0016] Preferably, a limit rod is slidably inserted into the side wall of the rotating seat, and a plurality of limit holes for the limit rod to pass through are provided in a circular array on the rotating block. A tension spring is mounted on the outer side of one end of the limit rod, and one end of the tension spring is fixedly connected to the end of the limit rod, and the other end is fixedly connected to the outer wall of the rotating seat.

[0017] Preferably, the lower ends of the supporting legs are fixedly mounted with anti-slip pads, and the lower ends of the pressing blocks are fixedly mounted with heat insulating pads.

[0018] Beneficial effects of the present invention: The present invention can fix the welding material on the welding table through the fixing component, so that the welding material is not easy to move during welding. The present invention can also fix both sides of the welding position during welding, further improving the fixing effect of the welding material. At the same time, the temperature measurement position of the infrared temperature detector can be flexibly adjusted through the position adjustment component and the angle adjustment component, so that the temperature of the welding head and the welding point can be monitored at the same time, improving the quality of temperature monitoring. In addition, the infrared temperature detector does not directly contact the heating material, reducing the damage of the temperature measurement structure caused by high temperature. It can be seen that compared with the existing technology, the present invention has outstanding substantive characteristics and significant progress, and the beneficial effects of its implementation are also obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2It is a structural schematic diagram of the welding station in the present invention;

[0021] Figure 3 It is a partial structural diagram of the fixing assembly in the present invention;

[0022] Figure 4 It is a schematic diagram of the partial cross-section structure of the pressing block in the present invention;

[0023] Figure 5 A schematic diagram of a partial cross-section structure of a ball presser in the present invention;

[0024] Figure 6 Schematic diagram of the connection structure of the moving component, the position adjustment component and the angle adjustment component in the present invention;

[0025] Figure 7 It is a structural schematic diagram of the mobile component in the present invention;

[0026] Figure 8 It is a schematic diagram of the partial cross-section structure of the sliding rod in the present invention;

[0027] Figure 9 Schematic diagram of the structure of the height-adjustable slide rail in the present invention;

[0028] Figure 10 It is a partial cross-sectional structural schematic diagram of the angle adjustment component in the present invention.

[0029] In the figure: 1. Welding table; 2. Support legs; 3. Anti-skid pad; 4. Fixing assembly; 401. Mounting plate; 402. Control motor; 403. Bidirectional threaded rod; 404. Moving plate; 405. Screw; 406. Knob; 407. Pressing block; 408. Insulation pad; 409. Mounting ring; 4010. Fixing bolt; 4011. Connecting ring; 4012. Large sleeve; 4013. Small sleeve; 4014. Pressing spring; 4015. Ball presser; 5. Control panel; 6. Moving slot; 7. Moving assembly; 701. Stepper motor Machine; 702, moving threaded rod; 703, moving block; 8, position adjustment assembly; 801, sliding rod; 802, slow self-locking motor; 803, driving bevel gear; 804, tapered rack; 805, height adjustment slide rail; 806, lifting slot; 807, servo motor; 808, lifting threaded rod; 809, lifting block; 8010, multi-section hydraulic self-locking push rod; 9, angle adjustment assembly; 901, rotating seat; 902, rotating block; 903, limit rod; 904, limit hole; 905, tension spring; 10, infrared temperature detector. DETAILED DESCRIPTION

[0030] In order to clearly illustrate the technical features of this solution, the solution is described below through specific implementation methods and in conjunction with the accompanying drawings.

[0031] A real-time temperature measurement device for friction stir welding comprises a welding platform 1, wherein support legs 2 are fixedly mounted at the four corners of the lower end of the welding platform 1, and anti-slip pads 3 are fixedly mounted at the lower ends of the support legs 2. Fixing components 4 for fixing welding materials are mounted on the front and rear sides of the upper end of the welding platform 1, and a control panel 5 is fixedly mounted on the front side of the upper end of the welding platform 1. Moving slots 6 are provided on the left and right sides of the upper end of the welding platform 1, and moving components 7 are mounted in each of the two moving slots 6. Position adjustment components 8 are mounted on each of the two moving components 7, and angle adjustment components 9 are mounted on the opposite ends of the two position adjustment components 8. An infrared temperature detector 10 is fixedly mounted on one side of each of the two angle adjustment components 9. When in use, the entire device is first placed at the use location using the support legs 2, and then the welding material is fixed to the welding platform 1 using the fixing components 4. The temperature measurement position is then adjusted using the position adjustment components 8 and the angle adjustment components 9. When welding is in progress, the moving component 7 drives the infrared temperature detector 10 to move with the welding point, thereby measuring the welding temperature in real time and improving the welding quality.

[0032] The fixing assembly 4 includes two mounting plates 401, which are fixedly installed at the upper corner positions of the welding table 1, and the two mounting plates 401 are respectively close to the ends of the two movable grooves 6. A control motor 402 is fixedly installed on one side of one of the mounting plates 401, and a bidirectional threaded rod 403 is rotatably connected between the two mounting plates 401, and one end of the bidirectional threaded rod 403 is fixedly connected to the output end of the control motor 402. The two ends of the bidirectional threaded rod 403 are respectively threadedly connected to an L-shaped movable plate 404, and the bottom of the movable plate 404 is in sliding contact with the welding table 1.

[0033] The fixing assembly 4 also includes a mounting ring 409, and a plurality of fixing bolts 4010 are evenly installed on the side wall of the mounting ring 409. The mounting ring 409 is fixedly connected to the external welding head through the fixing bolts 4010. The lower end of the mounting ring 409 is fixedly installed with a connecting ring 4011, and the lower end of the connecting ring 4011 is symmetrically fixed with two large sleeves 4012, and a small sleeve 4013 is slidably connected in the large sleeve 4012. A pressing spring 4014 is commonly installed inside the large sleeve 4012 and the small sleeve 4013, and a ball presser 4015 is fixedly installed on the outer lower end of the small sleeve 4013.

[0034] The mounting ring 409 is fixed to the external welding head by fixing bolts 4010, the material to be welded is placed on the welding table 1, and the motor 402 is controlled to drive the bidirectional threaded rod 403 to rotate, thereby driving the two movable plates 404 to move toward or away from each other. After the adjustment is completed, the knob 406 is turned, and the knob 406 drives the screw rod 405 to rotate. The screw 405 rotates and drives the pressing block 407 to move downward, pressing and fixing the welding material by the pressing block 407. During the welding process, the elastic force of the pressing spring 4014 presses the ball presser 4015 downward. The two ball pressers 4015 are located on both sides of the welding position, so that the welding material can be further fixed by the two ball pressers 4015, and the pressing position can be adjusted according to the movement of the external welding head, further improving the pressing effect.

[0035] The upper end of the movable plate 404 is threadedly connected to a screw 405, the upper end of the screw 405 is fixedly installed with a knob 406, the lower end of the screw 405 is installed with a pressing block 407, the lower end of the pressing block 407 is fixedly installed with a thermal insulation pad 408, the upper end of the pressing block 407 is provided with a mounting groove with a T-shaped cross section, the lower end of the screw 405 is fixedly connected with a mounting head with a T-shaped cross section, the pressing block 407 and the screw 405 are rotatably installed by the rotational engagement of the mounting groove and the mounting head, ensuring that the screw 405 can drive the pressing block 407 to move, and after the thermal insulation pad 408 contacts the welding material, it only presses the welding material downward without rotating relative to the welding material, thereby avoiding damage to the welding material.

[0036] The movable assembly 7 includes a stepper motor 701 and a movable threaded rod 702. The stepper motor 701 is fixedly mounted on one side of the welding table 1. The two ends of the movable threaded rod 702 are rotatably connected to the two ends of the movable groove 6. One end of the movable threaded rod 702 is fixedly connected to the output end of the stepper motor 701. A movable block 703 is threadedly connected to the movable threaded rod 702, and the movable block 703 slides in the movable groove 6. During welding, the stepper motor 701 drives the movable threaded rod 702 to rotate, thereby moving the movable block 703 in the movable groove 6. The temperature monitoring position can move with the welding position, thereby enabling real-time temperature measurement.

[0037] The position adjustment component 8 includes a sliding rod 801 and a slow self-locking motor 802. The sliding rod 801 is slidably engaged with the upper end of the moving block 703. The slow self-locking motor 802 is fixedly installed on the inner upper end of the moving block 703. The output end of the slow self-locking motor 802 is fixedly installed with an active bevel gear 803. A conical rack 804 is fixedly installed on one side of the inner upper end of the sliding rod 801. The active bevel gear 803 is meshed with the conical rack 804. The active bevel gear 803 drives the sliding rod 801 to adjust its horizontal position through the conical rack 804 meshed with it, and the transmission stability and transmission efficiency of the meshing of the active bevel gear 803 and the conical rack 804 are good, which can avoid the situation where the distance pushed during operation deviates from the actual set movement value due to the gap when the spur gear and the rack are meshed.

[0038] The end of the sliding rod 801 is fixedly connected to a height-adjusting slide rail 805, and a lifting groove 806 is provided on one side of the height-adjusting slide rail 805. A servo motor 807 is fixedly installed on the outer upper end of the height-adjusting slide rail 805. A lifting threaded rod 808 is rotatably connected in the lifting groove 806, and the upper end of the lifting threaded rod 808 is fixedly connected to the output end of the servo motor 807. A lifting block 809 is threadedly connected to the lifting threaded rod 808, and the lifting block 809 slides in cooperation with the lifting groove 806. A horizontally retractable multi-section hydraulic self-locking push rod 8010 is fixedly installed on the side of the lifting block 809, and the angle adjustment component 9 is installed at the end of the multi-section hydraulic self-locking push rod 8010 away from the lifting block 809.

[0039] When adjusting the horizontal and vertical position of the infrared temperature detector 10, the slow self-locking motor 802 drives the active bevel gear 803 to rotate. The active bevel gear 803, through the meshing tapered rack 804, drives the sliding rod 801 to move left or right to adjust the horizontal position. The servo motor 807 drives the lifting threaded rod 808 to rotate. The rotation of the lifting threaded rod 808 causes the lifting block 809, which is threadedly connected to it, to rise and fall. The lifting block 809 drives the angle adjustment assembly 9 to rise and fall synchronously via the multi-section hydraulic self-locking push rod 8010 until the two infrared temperature detectors 10 move to both sides of the welding point and welding joint, thereby enabling simultaneous temperature monitoring of the welding point and welding joint.

[0040] The angle adjustment assembly 9 includes a rotating seat 901 fixedly connected to the end of a multi-section hydraulic self-locking push rod 8010, a rotating block 902 is rotatably connected inside the rotating seat 901, and the infrared temperature detector 10 is fixedly installed on the side of the rotating block 902.

[0041] A limiting rod 903 is slidably inserted into the side wall of the rotating seat 901, and a plurality of limiting holes 904 for the limiting rod 903 to pass through are provided in a circular array on the rotating block 902. A tension spring 905 is sheathed on the outer side of one end of the limiting rod 903, and one end of the tension spring 905 is fixedly connected to the end of the limiting rod 903, and the other end is fixedly connected to the outer wall of the rotating seat 901.

[0042] When adjusting the angle of the infrared temperature detector 10, pull the limit rod 903 until the limit rod 903 disengages from the limit hole 904, then rotate the rotating block 902, and the rotating block 902 drives the infrared temperature detector 10 to adjust the angle until the two infrared temperature detectors 10 monitor the temperature of the welding head and the welding point respectively, then release the limit rod 903, and under the resetting action of the tension spring 905, drive the limit rod 903 to be clamped in the corresponding limit hole 904 to fix the rotating block 902, thereby fixing the position of the infrared temperature detector 10.

[0043] In the present invention, when welding is required, the entire device is first placed at the location of use via the support legs 2, the material to be welded is placed on the welding table 1, the mounting ring 409 is fixed to the external welding head via the fixing bolts 4010, the motor 402 is controlled to drive the bidirectional threaded rod 403 to rotate, so that the two movable plates 404 on the bidirectional threaded rod 403 move toward or away from each other to adjust the pressing position, and after the pressing position adjustment is completed, the knob 406 is rotated, and the knob 406 drives the screw rod 405 to rotate, thereby driving the pressing block 407 to descend, and the welding material is pressed and fixed by the pressing block 407. During the welding process, the pressing spring 4014 pushes the ball presser 4015 downward, and the two ball pressers 4015 at the lower end of the connecting ring 4011 are located on both sides of the welding position, thereby further fixing the welding material through the two ball pressers 4015, and the pressing position can be adjusted following the movement of the external welding head, further improving the pressing and fixing effect. The slow, self-locking motor 802 drives the driving bevel gear 803 to rotate, thereby driving the sliding rod 801 horizontally via the conical rack 804 to adjust the horizontal position of the external temperature detector 10. The servo motor 807 drives the lifting threaded rod 808 to rotate, causing the lifting block 809 to rise and fall in the lifting slot 806. The multi-section hydraulic self-locking push rod 8010 also drives the angle adjustment assembly 9 to rise and fall synchronously until the two infrared temperature detectors 10 are moved to the sides of the welding point and the welding joint. The limit rod 903 is pulled until it disengages the limit hole 904, and then the rotating block 902 is rotated. The rotating block 902 drives the infrared temperature detectors 10 to adjust the angle until the two infrared temperature detectors 10 can respectively monitor the temperature of the welding joint and the welding point. The limit rod 903 is then released, and the tension spring 905 resets the limit rod 903, driving it to insert into the corresponding limit hole 904, thereby fixing the rotating block 902. During welding, the stepper motor 701 drives the movable threaded rod 702 to rotate, so that the movable block 703 moves in the movable slot 6, so that the temperature monitoring position can move with the welding position, thereby enabling real-time temperature measurement.

[0044] Technical features not described in the present invention can be implemented by existing technologies and will not be described in detail here. The present invention is not limited to the above-mentioned specific embodiments. Changes, modifications, additions or substitutions made by ordinary technicians in this field within the scope of the essence of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A real-time temperature measurement device for friction stir welding, comprising a welding platform (1), wherein support legs (2) are fixedly mounted at the four corners of the lower end of the welding platform (1), and wherein: A fixing assembly (4) for fixing welding materials is installed on both the front and rear sides of the upper end of the welding table (1), a control panel (5) is fixedly installed on the front side of the upper end of the welding table (1), a movable groove (6) is opened on both the left and right sides of the upper end of the welding table (1), a movable assembly (7) is installed in each of the two movable grooves (6), a position adjustment assembly (8) is installed on each of the two movable assemblies (7), an angle adjustment assembly (9) is installed at the opposite end of the two position adjustment assemblies (8), and an infrared temperature detector (10) is fixedly installed on one side of each of the two angle adjustment assemblies (9); The fixing assembly (4) comprises a mounting ring (409), a plurality of fixing bolts (4010) are evenly installed on the side wall of the mounting ring (409), the mounting ring (409) is fixedly connected to the external welding head via the fixing bolts (4010), a connecting ring (4011) is fixedly installed on the lower end of the mounting ring (409), two large sleeves (4012) are symmetrically fixedly connected to the lower end of the connecting ring (4011), a small sleeve (4013) is slidably connected in the large sleeve (4012), a pressing spring (4014) is commonly installed inside the large sleeve (4012) and the small sleeve (4013), and a ball presser (4015) is fixedly installed on the outer lower end of the small sleeve (4013); The angle adjustment assembly (9) includes a rotating seat (901), a rotating block (902) is rotatably connected to the rotating seat (901), and the infrared temperature detector (10) is fixedly mounted on a side of the rotating block (902); A limiting rod (903) is slidably inserted into the side wall of the rotating seat (901), and a plurality of limiting holes (904) for the limiting rod (903) to pass through are provided in a circumferential array on the rotating block (902). A tension spring (905) is sleeved on the outer side of one end of the limiting rod (903), and one end of the tension spring (905) is fixedly connected to the end of the limiting rod (903), and the other end is fixedly connected to the outer wall of the rotating seat (901).

2. The real-time temperature measurement device for friction stir welding according to claim 1, characterized in that: The fixing assembly (4) further comprises two mounting plates (401), the two mounting plates (401) being fixedly mounted at the upper corner positions of the welding table (1), and the two mounting plates (401) being respectively close to the ends of the two movable slots (6), a control motor (402) being fixedly mounted on one side of one of the mounting plates (401), a bidirectional threaded rod (403) being rotatably connected between the two mounting plates (401), and one end of the bidirectional threaded rod (403) being fixedly connected to the output end of the control motor (402), and both ends of the bidirectional threaded rod (403) being respectively threadedly connected to an L-shaped movable plate (404), and the bottom of the movable plate (404) being in sliding contact with the welding table (1).

3. The real-time temperature measurement device for friction stir welding according to claim 2, wherein: The upper end of the movable plate (404) is threadedly connected to a screw rod (405), the upper end of the screw rod (405) is fixedly mounted with a knob (406), the lower end of the screw rod (405) is mounted with a pressing block (407), the upper end of the pressing block (407) is provided with a mounting groove with a T-shaped cross section, the lower end of the screw rod (405) is fixedly connected with a mounting head with a T-shaped cross section, and the pressing block (407) and the screw rod (405) are rotatably mounted by rotating the mounting groove and the mounting head.

4. The real-time temperature measurement device for friction stir welding according to claim 3, characterized in that: The moving assembly (7) comprises a stepping motor (701) and a moving threaded rod (702), wherein the stepping motor (701) is fixedly mounted on one side of the welding table (1), two ends of the moving threaded rod (702) are rotatably connected to two ends of the moving groove (6), and one end of the moving threaded rod (702) is fixedly connected to an output end of the stepping motor (701), a moving block (703) is threadedly connected to the moving threaded rod (702), and the moving block (703) is slidably engaged with the moving groove (6).

5. The real-time temperature measuring device for friction stir welding according to claim 4, characterized in that: The position adjustment assembly (8) comprises a sliding rod (801) and a slow self-locking motor (802), wherein the sliding rod (801) is slidably engaged with the upper end of the moving block (703), the slow self-locking motor (802) is fixedly mounted on the inner upper end of the moving block (703), an active bevel gear (803) is fixedly mounted on the output end of the slow self-locking motor (802), a conical rack (804) is fixedly mounted on one side of the inner upper end of the sliding rod (801), and the active bevel gear (803) is meshed with the conical rack (804).

6. The real-time temperature measurement device for friction stir welding according to claim 5, characterized in that: The end of the sliding rod (801) is fixedly connected to a height-adjusting slide rail (805), a lifting groove (806) is provided on one side of the height-adjusting slide rail (805), a servo motor (807) is fixedly installed on the outer upper end of the height-adjusting slide rail (805), a lifting threaded rod (808) is rotatably connected in the lifting groove (806), and the upper end of the lifting threaded rod (808) is fixedly connected to the output end of the servo motor (807), a lifting block (809) is threadedly connected to the lifting threaded rod (808), and the lifting block (809) is slidably matched with the lifting groove (806), a horizontally retractable multi-section hydraulic self-locking push rod (8010) is fixedly installed on the side of the lifting block (809), and the angle adjustment component (9) is installed at one end of the multi-section hydraulic self-locking push rod (8010) away from the lifting block (809).

7. The real-time temperature measurement device for friction stir welding according to any one of claims 3 to 6, characterized in that: The lower ends of the support legs (2) are fixedly mounted with anti-slip pads (3), and the lower ends of the pressing blocks (407) are fixedly mounted with heat-insulating pads (408).

Images