A pressure regulated inertial friction welding system and method

Abstract

The application provides an inertia friction welding system and method for adjusting pressure, relates to the field of inertia friction welding, and aims at the problem that cracks and flash may appear in a welding area due to improper welding pressure and temperature control, especially in the end stage of welding, and that a workpiece is prone to unstable deformation due to a large post-peak torque. Strain gauges and a temperature monitor are used to obtain the torque of a workpiece to be welded and the temperature of a welding friction interface during welding, a servo feeding assembly is used to adjust the pressure between the workpieces to be welded, the temperature monitor is used to realize temperature monitoring during inertia friction welding, the friction pressure is adjusted to avoid deterioration of the organization performance caused by excessively high welding temperature, and the welding joint quality is improved; the strain gauges are used to realize torque monitoring during inertia friction welding, the friction pressure is adjusted to avoid a large post-peak torque, unstable deformation is prevented, welding forming is improved, and quality problems such as unstable deformation and flash cracking are effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of inertia friction welding, in particular to an inertia friction welding system and method for adjusting pressure. BACKGROUND

[0002] Inertia friction welding technology is an important connection method for axisymmetric parts such as pipes and bars in the current equipment manufacturing industry, which has the advantages of low heat input, few welding defects, etc., and can realize effective connection between homogenous or heterogeneous metals. The typical welding process is as follows: before the start of welding, the main motor is connected with the main shaft and flywheel set through the clutch and drives them and the workpiece clamped thereon to rotate, storing kinetic energy in the rotating flywheel set and main shaft. When the rotation speed of the main shaft and flywheel set reaches the set value, the main motor is disconnected from the flywheel set and the main shaft, and the welding process starts. The servo feed assembly drives the tail seat and the workpiece clamped thereon to move axially until it contacts the rotating workpiece. Under the action of friction pressure and torque, the kinetic energy stored in the main shaft and flywheel set is converted into heat energy at the friction interface of the workpiece, heating the workpiece to a thermoplastic state, and gradually extruding the flash under the continuous action of friction pressure until the kinetic energy of the main shaft and flywheel set is exhausted and stops rotating. After a certain pressure holding time, the pressure is removed and the welding is completed. Inertia friction welding technology mainly includes three welding parameters: moment of inertia, initial rotation speed and friction pressure. The moment of inertia is determined by the main shaft and flywheel set and cannot be changed after the start of the welding process. The initial rotation speed depends on the set value before the start of the welding process, and the rotation speed during the welding process is self-decreasing and cannot be directly controlled. The friction pressure is applied by the hydraulic system on the feed side and can be changed during the welding process.

[0003] A kind of inertia friction welding equipment is disclosed in Chinese patent (publication number CN 108637464 A), which sets and controls the pressure of power pump group and the rotation speed of primary pressure proportional regulating output by PLC control unit, detects the parameters in the welding process, reads and stores the welding data in the welding process;High-speed controller I is connected with secondary pressure servo proportional regulating output in hydraulic system, used to adjust the pressure of top forging cylinder and hydraulic balance piston of main shaft in main system, which can control the time of welding process;However, after the start of welding, there is lack of effective control measures, for some special materials or thin-walled structural parts, the larger "after peak value" torque near the end of welding is easy to cause instability deformation, flash cracking, etc., which has adverse effects on the welding quality. The above problems lead to inertia friction welding process development needs a lot of trial and error tests to explore suitable process parameters, consumes a lot of test materials, increases the cost of process development;Welding instability deformation will reduce the yield, cause production material waste and increase production cost, limit the popularization and application of inertia friction welding technology. SUMMARY

[0004] The present application aims at the defects existing in the prior art, and provides an inertia friction welding system and method for adjusting pressure, which acquires the torque of a workpiece to be welded and the temperature of a welding friction interface during the welding process by using a strain gauge and a temperature monitor, and adjusts the pressure between the workpieces to be welded by using a servo feeding assembly, so as to accurately control the pressure and temperature during the welding process, and effectively reduce quality problems such as unstable deformation and flash cracking.

[0005] The first object of the present application is to provide an inertia friction welding system for adjusting pressure, which adopts the following scheme:

[0006] comprises:

[0007] The inertia friction welding machine comprises oppositely arranged flywheel groups and tail seats, the flywheel groups and the tail seats are respectively provided with clamping assemblies, the flywheel groups are connected to a rotary driving element through a clutch, and the tail seats are connected to a servo feeding assembly;

[0008] The control assembly comprises a controller, a strain gauge and a temperature monitor, the strain gauge is provided with an attaching surface for being attached to a workpiece to be welded corresponding to the tail seat, and can measure strain data of the workpiece to be welded and send the strain data to the controller; the monitoring area of the temperature monitor covers a welding area of the workpiece to be welded, and can send the temperature of the welding area to the controller; and the controller is used for controlling the servo feeding assembly to adjust the pressure between the workpieces to be welded.

[0009] Further, the clamping assemblies on the flywheel groups form first clamping parts, the clamping assemblies on the tail seats form second clamping parts, and the first clamping parts and the second clamping parts are coaxially distributed.

[0010] Further, the inertia friction welding machine further comprises a workbench, the workbench is provided with a guide rail parallel to the movement direction of the servo feeding assembly, and the tail seat is slidably installed on the workbench in cooperation with the guide rail.

[0011] Further, the strain gauge is connected to the controller through a strain type torque measuring instrument, and the temperature monitor is an infrared temperature monitor.

[0012] Further, the output end of the rotary driving element is connected to the input end of the clutch through a driving shaft, and the output end of the clutch is connected to the flywheel groups through a rotary main shaft.

[0013] Further, the rotary driving element and the clutch are connected to the controller respectively, and the controller is used for controlling the operating parameters of the rotary driving element and the working state of the clutch.

[0014] Further, the servo feeding assembly comprises a hydraulic jack, one end of the hydraulic jack is fixed on the inertia friction welding machine, and the other end of the hydraulic jack is connected to the tail seat to drive the tail seat to move relative to the flywheel groups.

[0015] The second object of the present application is to provide a method for operating a pressure-adjusted inertial friction welding system as described in the first object, comprising:

[0016] The clamping assembly on the flywheel set and the clamping assembly on the tailstock clamp the workpieces to be welded respectively, the bonding surface of the strain gauge is attached to the workpiece to be welded corresponding to the tailstock, and the temperature monitor monitors the temperature of the friction interface of the workpiece to be welded.

[0017] The rotating drive element is started to drive the clamping assembly on the flywheel set and the clamped workpieces to be welded to rotate, and after the required rotating speed is reached, the power between the rotating drive element and the workpieces to be welded is cut off by the clutch.

[0018] The servo feed assembly pushes the tailstock and the clamped workpieces to be welded to move, so that the two workpieces to be welded are in contact and pressure is applied.

[0019] The temperature monitor continuously collects the temperature of the friction interface of the workpiece to be welded and sends it to the controller, and the strain gauge measures the strain data of the workpiece to be welded and sends it to the controller.

[0020] The controller controls the pressure applied to the workpieces to be welded by the servo feed assembly according to the monitoring data of the temperature monitor and / or the strain gauge, so that the joints of the workpieces to be welded are fully welded.

[0021] Further, the target temperature range of the friction interface is set in advance, and the servo feed assembly is controlled to increase, decrease or maintain the pressure applied between the workpieces to be welded, so that the temperature of the friction interface is maintained within the target temperature range.

[0022] Further, the target torque range of the workpieces to be welded is set in advance, the real-time torque collected by the strain gauge is compared with the target torque range, and the servo feed assembly is controlled so that the real-time torque is maintained within the target torque range.

[0023] Compared with the prior art, the present application has the advantages and positive effects that:

[0024] (1) In view of the problem that due to improper control of welding pressure and temperature, cracks and flash may occur in the welding area, especially in the end stage of welding, the "post-peak" torque is large, which easily leads to unstable deformation of the workpiece, the temperature monitor and the strain gauge are used to obtain the temperature of the welding friction interface and the torque of the workpiece to be welded during welding, and the servo feed assembly is used to adjust the pressure between the workpieces to be welded, the temperature monitor can realize temperature monitoring during the inertial friction welding process, and the welding temperature is prevented from being too high by adjusting the friction pressure, so as to improve the quality of the welded joint; the strain gauge can realize torque monitoring during the inertial friction welding process, and the "post-peak" torque is prevented from being too large by adjusting the friction pressure, so as to prevent unstable deformation, improve the welding forming, and effectively reduce the quality problems of unstable deformation and flash cracking.

[0025] (2) According to the temperature and torque monitoring data, the inertia friction welding process friction pressure can be automatically adjusted by the controller without damaging or changing the original mechanical structure of the inertia friction welding machine. By adding external equipment, integrating data processing and control programs, the friction torque, friction heat generation rate and welding time can be changed by adjusting the welding process friction pressure, the welding forming is improved, the welding quality is improved, the inertia friction welding process development and application cost is reduced, the operation is simple, and the cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0026] The drawings accompanying the specification of this application form a part thereof, serve to further provide a further understanding of the application, and together with the description of the exemplary embodiments of the application, explain the application, and do not constitute an improper limitation of the application.

[0027] Figure 1 Schematic diagram of the inertia friction welding system for adjusting pressure in embodiments 1 and 2 of the application.

[0028] 1, workbench; 2, rotary drive motor; 3, drive shaft; 4, clutch; 5, rotary main shaft; 6, flywheel set; 7, clamping assembly; 8, tailstock; 9, hydraulic ejector rod; 10, servo feed assembly; 11, guide rail; 12, controller; 13, strain gauge; 14, strain torque measuring instrument; 15, infrared temperature monitor; 16, workpiece to be welded. DETAILED DESCRIPTION

[0029] Embodiment 1

[0030] In a typical embodiment of the application, as shown in Figure 1 , a kind of inertia friction welding system for adjusting pressure is given.

[0031] After the start of welding, lack of effective control measures, for some special materials or thin-walled structural parts, the larger "after peak" torque near the end of welding is easy to cause instability deformation, flash cracking, etc., which has adverse effects on the welding quality; based on this, a kind of inertia friction welding system for adjusting pressure is given in the embodiment, by accurately controlling the pressure and temperature in the welding process, to improve the welding quality and yield, reduce the process development cost and production material waste.

[0032] As shown in Figure 1As shown, the pressure-adjusted inertia friction welding system comprises an inertia friction welding machine and a control assembly, wherein the inertia friction welding machine is subject to a workbench 1, which is provided with a rotary driving element, a clutch 4, a flywheel set 6, a tailstock 8, a servo feed assembly 10 and a guide rail 11. The flywheel set 6 is connected with the rotary driving element through the clutch 4 for storing and releasing rotary kinetic energy. The flywheel set 6 is provided with a clamping assembly 7, which forms a first clamping part. The tailstock 8 is arranged opposite to the flywheel set 6 for clamping the other end of a workpiece 16 to be welded, and the tailstock 8 is also provided with a clamping assembly 7, which forms a second clamping part. The first clamping part and the second clamping part are coaxially distributed, they are on the same straight line, and the center points coincide, which helps to ensure that the clamped workpiece maintains stable coaxiality during welding. The servo feed assembly 10 is connected with the tailstock 8 for accurately controlling the relative position and pressure between the workpieces 16 to be welded. The direction of the guide rail 11 is parallel to the movement direction of the servo feed assembly 10, so that the movement direction of the workpiece 16 clamped by the tailstock 8 and the clamping assembly 7 thereon meets the requirements of inertia friction welding. The tailstock 8 is installed on the workbench 1 in a sliding manner in cooperation with the guide rail 11. The tailstock 8 moves linearly on the workbench 1, thereby adjusting the distance between the tailstock 8 and the flywheel set 6.

[0033] The control assembly comprises a controller 12, a strain gauge 13 and a temperature monitor. The controller 12 is the core of the system, which is responsible for receiving sensor data and issuing control instructions. The strain gauge 13 is attached to the contact surface of the workpiece 16 to be welded corresponding to the tailstock 8, which is used to measure the strain data of the workpiece 16 to be welded, reflecting the deformation of the workpiece. The temperature monitor monitors the welding area of the workpiece 16 to be welded and obtains the temperature information of the welding area in real time.

[0034] The strain gauge 13 is connected to the controller 12 through a strain torque measuring instrument 14. The strain gauge 13 is used to monitor the torque change generated during the welding process, thereby reflecting the welding state. The temperature monitor adopts an infrared temperature monitor 15, which is also connected to the controller 12. The infrared temperature monitor 15 can non-contact real-time monitor the temperature change of the welding area, ensuring that the welding process is carried out in a safe and controllable range.

[0035] Specifically, as shown in Figure 1 The infrared temperature monitor 15 is arranged beside the friction interface, so that the friction interface in the welding process appears in the monitoring range of the infrared detector, and is effectively connected with the controller 12. The infrared temperature monitor 15 can select a region and output the temperature data of the region. The infrared temperature monitor 15 should ensure that the center axis is in the same plane as the friction interface. The strain torque measuring instrument 14 is arranged beside the workpiece on the feed side and is effectively connected with the controller 12. The strain gauge 13 is attached to the outer cylindrical surface of the unclamped part of the workpiece on the feed side and is effectively connected with the strain torque measuring instrument 14.

[0036] In this embodiment, the controller 12 integrates data processing and control programs, and controls the servo feeding assembly 10 on the feeding side to adjust the friction pressure of the welding process by processing the collected temperature and torque data through the data processing and control programs.

[0037] The output end of the rotary drive element is connected to the input end of the clutch 4 through the drive shaft 3, and the output end of the clutch 4 is connected to the flywheel set 6 through the rotary main shaft 5. The controller 12 precisely controls the rotation speed of the flywheel set 6 by controlling the working state of the rotary drive element and the clutch 4. The rotary drive element can be an electric motor, a hydraulic motor, etc., and can be selected according to specific needs, such as a direct current motor, an alternating current motor, a servo motor, or a stepping motor, etc. The clutch 4 can be an electromagnetic clutch, a pneumatic clutch, or a hydraulic clutch, etc. The servo feeding assembly 10 mainly consists of a hydraulic jack 9, a fixing device, a connecting piece, a control system, etc. One end of the hydraulic jack 9 is fixed on the inertia friction welding machine, and the other end is connected to the tail seat 8. Through coordinated work, it ensures that the tail seat 8 can move smoothly and accurately relative to the flywheel set 6, thereby adjusting the gap and contact pressure between the workpieces. The hydraulic jack 9 is the core component of the servo feeding assembly 10, which realizes the extension and retraction movement by using the principle of hydraulic pressure. The hydraulic jack 9 is usually composed of a cylinder, a piston, a sealing element, and a guide device, etc. The cylinder is filled with hydraulic oil, and when the piston is subjected to pressure, it will reciprocate in the cylinder, thereby driving the connected part to move.

[0038] Among them, the control system of the servo feeding assembly 10 is responsible for receiving instructions from the controller 12 and controlling the extension and retraction movement of the hydraulic jack 9. The control system is usually composed of solenoid valves, sensors, the controller 12, and power sources, etc. The solenoid valve is used to control the flow direction and flow rate of the hydraulic oil, so as to realize the precise control of the extension and retraction speed and displacement of the hydraulic jack 9. The sensor is used to monitor the position and speed of the hydraulic jack 9 in real time, and feed these information back to the controller 12. The controller 12 calculates the gap and contact pressure that need to be adjusted according to these information and the preset welding parameters, and issues corresponding control instructions.

[0039] By designing the coaxially distributed first clamping part and second clamping part, the coaxiality of the clamped workpiece during the welding process is ensured, and the welding quality and stability are improved. Through the precise control of the controller 12 on the rotary drive element, the clutch 4, and the servo feeding assembly 10, the precise adjustment of the rotation speed of the flywheel set 6 and the moving distance of the tail seat 8 is realized, thereby improving the controllability and precision of the welding process. Through the real-time monitoring of the strain gauge 13 and the infrared temperature monitor 15, abnormal conditions in the welding process can be found in time, such as excessive torque, excessive temperature, etc., so as to avoid the occurrence of welding defects and safety accidents.

[0040] Embodiment 2

[0041] In another exemplary embodiment of the present application, as shown in Figure 1 A working method of the pressure-adjustable inertia friction welding system is provided, which utilizes the pressure-adjustable inertia friction welding system as in Embodiment 1.

[0042] A working method of the pressure-adjustable inertia friction welding system comprises:

[0043] The clamping assembly 7 on the flywheel set 6 and the clamping assembly 7 on the tailstock 8 clamp the workpieces 16 to be welded respectively, the sticking surface of the strain gauge 13 is pasted on the workpiece 16 to be welded corresponding to the tailstock 8, and the temperature monitor monitors the temperature of the friction interface of the workpiece 16 to be welded;

[0044] The rotating driving element is started to drive the clamping assembly 7 on the flywheel set 6 and the workpiece 16 to be welded clamped thereby to rotate, and after the rotating speed reaches the requirement, the power clutch 4 is used to cut off the power between the rotating driving element and the workpiece 16 to be welded;

[0045] The servo feeding assembly 10 pushes the tailstock 8 and the workpiece 16 to be welded clamped thereby to move, so that the two workpieces 16 to be welded contact and exert pressure;

[0046] The temperature monitor continuously collects the temperature of the friction interface of the workpiece 16 to be welded and sends it to the controller 12, and the strain gauge 13 measures the strain data of the workpiece 16 to be welded and sends it to the controller 12;

[0047] The controller 12 controls the servo feeding assembly 10 to exert the pressure between the workpieces 16 to be welded according to the monitoring data of the temperature monitor and / or the strain gauge 13, so that the joint of the workpieces 16 to be welded is fully welded.

[0048] The target temperature range of the friction interface is preset, and the servo feeding assembly 10 is controlled to increase, decrease or keep the pressure exerted between the workpieces 16 to be welded, so that the temperature of the friction interface is kept within the target temperature range.

[0049] The target torque range of the workpiece 16 to be welded is preset, the real-time torque collected by the strain gauge 13 is compared with the target torque range, and the servo feeding assembly 10 is controlled so that the real-time torque is kept within the target torque range.

[0050] Specifically, in combination with Figure 1 The working method of the pressure-adjustable inertia friction welding system comprises:

[0051] The infrared temperature monitor 15 is arranged beside the friction interface, so that the friction interface in the welding process is in the monitoring range of the infrared detector. The strain torque measuring instrument 14 is arranged beside the workpiece on the feeding side, and the strain gauge 13 is pasted on the outer column surface of the unclamped part of the workpiece on the feeding side. The controller 12 is used to control the inertial friction welding machine to start working. The infrared temperature monitor 15 and the strain torque measuring instrument 14 transmit the obtained temperature and torque data to the controller 12. After data processing and control program processing, the servo feeding assembly 10 is controlled to adjust the friction pressure in the welding process.

[0052] The target temperature is set in the data processing and control program before the welding starts. The monitoring area including the friction interface is selected in the infrared temperature monitor 15. After the welding starts, the infrared temperature monitor 15 continuously collects and sends the temperature data to the controller 12. The data processing and control program compares the collected temperature with the target temperature. When the collected temperature is higher than the target temperature, the servo feeding assembly 10 is controlled to reduce the friction pressure. When the collected temperature is lower than the target temperature, the servo feeding assembly 10 is controlled to increase the friction pressure to the preset value. The above monitoring and adjusting process is repeated until the welding is completed.

[0053] The target torque is set in the data processing and control program before the welding starts. After the welding starts, the strain torque measuring instrument 14 continuously collects and sends the torque data to the controller 12. The data processing and control program compares the collected torque with the target torque. When the collected torque is greater than the target torque, the servo feeding assembly 10 is controlled to reduce the friction pressure. When the collected torque is less than the target torque, the servo feeding assembly 10 is controlled to increase the friction pressure to the preset value. The above monitoring and adjusting process is repeated until the welding is completed.

[0054] In the inertial friction welding process, when the temperature of the friction interface is too high, the microstructure of the metal near the interface will deteriorate, such as grain coarsening and strengthening phase dissolution, which will reduce the performance of the joint. At the same time, the deformation resistance of the overheated metal decreases significantly, which is easy to cause unstable deformation and affect the joint forming. Friction heat accounts for a large part of the heat generated in the inertial friction welding process, and is the main factor for heating the workpiece. The friction heat power P is related to the relative speed v and the friction force f, P=vf. The friction force f is proportional to the normal pressure fn, f=μfn. In the inertial friction welding, it is proportional to the friction pressure p. Therefore, adjusting the friction pressure p can change the friction heat power of the friction interface. When the temperature of the friction interface is too high, reducing the friction pressure can reduce the friction heat power. When the interface heat power is less than the heat conduction, heat convection and heat radiation loss power of the workpiece, the interface temperature will decrease, so as to avoid the damage to the joint forming and performance caused by the excessive temperature of the workpiece.

[0055] In addition, in the inertia friction welding process, after the material reaches the hot plastic state, the deformation resistance decreases, and for some special materials and thin-walled structures, instability deformation is prone to occur under the action of a larger friction torque, affecting the welding forming and quality. The friction torque M is proportional to the friction force f, so adjusting the friction pressure can change the friction force and the interface friction torque. When the friction torque is too large, the friction pressure can be reduced to reduce the friction force and the friction torque, preventing instability deformation.

[0056] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An inertial friction welding system with adjustable pressure, characterized in that, include: An inertial friction welding machine includes a flywheel assembly and a tailstock arranged opposite to each other. Clamping components are respectively provided on the flywheel assembly and the tailstock. The flywheel assembly is connected to a rotary drive element through a clutch, and the tailstock is connected to a servo feed assembly. The servo feed assembly includes a hydraulic push rod, one end of which is fixed on the inertial friction welding machine, and the other end is connected to the tailstock to drive the tailstock to move relative to the flywheel assembly. The control component includes a controller, strain gauges, and a temperature monitor. The strain gauges have a mounting surface for attaching to the workpiece to be welded corresponding to the tailstock. The strain gauges are connected to the controller via a strain gauge torque meter and can measure the strain data of the workpiece to be welded and send it to the controller. The temperature monitor covers the welding area of ​​the workpiece to be welded and can send the temperature of the welding area to the controller. The controller integrates data processing and control programs, and processes the collected temperature and torque data through the data processing and control programs to control the servo feed component to adjust the pressure between the workpieces to be welded.

2. The pressure-adjustable inertial friction welding system as described in claim 1, characterized in that, The clamping assembly on the flywheel assembly forms a first clamping part, and the clamping assembly on the tailstock forms a second clamping part. The first clamping part and the second clamping part are coaxially distributed.

3. The pressure-adjustable inertial friction welding system as described in claim 2, characterized in that, The inertial friction welding machine also includes a worktable, on which a guide rail parallel to the movement direction of the servo feed component is provided, and the tailstock is slidably mounted on the worktable in cooperation with the guide rail.

4. The pressure-adjustable inertial friction welding system as described in claim 1, characterized in that, The temperature monitoring instrument is an infrared temperature monitoring instrument.

5. The pressure-adjustable inertial friction welding system as described in claim 1, characterized in that, The output end of the rotary drive element is connected to the input end of the clutch via a drive shaft, and the output end of the clutch is connected to the flywheel assembly via a rotary main shaft.

6. The pressure-adjustable inertial friction welding system as described in claim 5, characterized in that, The rotary drive element and the clutch are respectively connected to the controller, which is used to control the operating parameters of the rotary drive element and the working state of the clutch.

7. A method for operating a pressure-adjustable inertial friction welding system, utilizing the pressure-adjustable inertial friction welding system as described in any one of claims 1-6, characterized in that, include: The clamping components on the flywheel assembly and the clamping components on the tailstock clamp the workpieces to be welded respectively. The application surface of the strain gauge is attached to the workpiece to be welded corresponding to the tailstock. The temperature monitoring instrument monitors the temperature of the friction interface of the workpiece to be welded. Start the rotary drive element, which drives the clamping components on the flywheel assembly and the workpiece to be welded to rotate. Once the required speed is reached, use the clutch to cut off the power between the rotary drive element and the workpiece to be welded. The servo feed assembly drives the tailstock and the workpiece to be welded to move, so that the two workpieces to be welded come into contact and apply pressure. The temperature monitor continuously collects the temperature of the friction interface of the workpiece to be welded and sends it to the controller; the strain gauge measures the strain data of the workpiece to be welded and sends it to the controller. Based on the monitoring data from the temperature monitor and / or strain gauges, the controller controls the pressure applied between the workpieces to be welded by the servo feed assembly, so that the joints of the workpieces to be welded are fully welded.

8. The working method of the pressure-adjusting inertial friction welding system as described in claim 7, characterized in that, The target temperature range of the friction interface is preset, and the servo feed component is controlled to increase, decrease, or maintain the pressure applied between the workpieces to be welded, so that the temperature of the friction interface is kept within the target temperature range.

9. The working method of the pressure-adjusting inertial friction welding system as described in claim 7, characterized in that, The target torque range of the workpiece to be welded is preset, and the real-time torque collected by the strain gauge is compared with the target torque range. The servo feed component is controlled to keep the real-time torque within the target torque range.

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