Friction welding auxiliary machining device for large-wall-thickness annular pipe component and working method of friction welding auxiliary machining device

Abstract

The invention provides a friction welding auxiliary machining device for a large-wall-thickness annular pipe component and a working method of the friction welding auxiliary machining device, and belongs to the technical field of friction welding. The problems that an existing device has the heat permeability problem due to large-diameter and high-wall-thickness workpieces, and the heat permeability problem cannot be solved through pure external heating or internal heating are solved. The device comprises a main shaft side box body, a main shaft side clamp, an external blowing assembly, a tailstock side to-be-welded piece, an internal heating assembly and an external heating assembly, the main shaft side box body is installed on one side of a lathe bed, the main shaft side clamp is installed in the main shaft side box body, and the external blowing assembly is arranged on the outer side of a welding area of the main shaft side to-be-welded piece. The tailstock side clamp is installed in the movable sliding table box body through the tailstock fixing base, the inner heating assembly is connected to the outer side of the inner blowing assembly in a sleeving mode, and the inner heating assembly and the outer heating assembly are arranged on the inner side and the outer side of a to-be-welded workpiece on the tailstock side respectively. The device is mainly used for friction welding auxiliary machining of large-diameter and high-thickness workpieces.

Description

Technical Field

[0001] The invention belongs to the technical field of friction welding, and in particular relates to a friction welding auxiliary processing device for a thick-walled annular pipe component and a working method thereof. Background Art

[0002] In recent years, inertia friction welding has the advantages of fewer process parameters, high stability, less heat input, narrow weld range, and high joint mechanical properties. It has great potential in the industrial field. Many products are used in the aerospace field, etc. The existing inertia friction welding process is: the workpieces to be welded are fixed at the rotating end and the sliding end respectively. When the speed of the rotating end reaches the set value, the drive motor of the spindle is separated from the rotating end, and the sliding end is driven by the hydraulic servo to move toward the rotating end, generating friction heat at the contact interface. Due to the action of friction, the material undergoes plastic deformation at the welding interface, and the temperature of the material gradually increases. When the speed of the rotating end drops to a certain value, the start The workpiece to be welded is forged first, and after a certain period of time, the sliding end is withdrawn and the welding process is completed. After welding, heat treatment is performed according to the corresponding material properties and post-welding and performance requirements. For example, heavy-duty gears are widely used in industrial heavy-duty fields due to their high torque output and high reduction ratio. In order to improve the overall performance of heavy-duty gears, inertia friction welding is used to weld them. In addition, large-walled annular tube components used in wind power, ships, heavy vehicles and other fields can be welded by inertia friction welding. After inertia friction welding, the weld needs to be heat treated to improve the mechanical properties of the welded joint.

[0003] However, due to the problem of thermal permeability of workpieces with large diameter and thick wall, and simple external heating or internal heating cannot solve the problem of thermal permeability, the external temperature cools down while the internal temperature is at a high temperature after welding, resulting in uneven overall temperature, which makes the material weld structure uneven, and then leads to uneven performance of the welded joint. Based on the above problems, a friction welding auxiliary processing device for tubular parts with thick wall and a working method thereof are proposed. Summary of the invention

[0004] In view of this, the present invention aims to propose a friction welding auxiliary processing device for large-wall thickness annular tube components and a working method thereof, so as to solve the problem of thermal permeability of existing devices due to workpieces with large diameters and thick walls, and simple external heating or internal heating cannot solve the thermal permeability problem. The external temperature is cooled while the internal temperature is at a high temperature after welding, resulting in uneven overall temperature, thereby making the material weld structure uneven, and further causing the problem of uneven performance of the welded joint.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A friction welding auxiliary processing device for thick-walled annular tube components, comprising a spindle side box, a spindle side fixture, an external blowing assembly, a spindle side workpiece to be welded, a movable slide box, a bed, a tailstock fixed seat, a tailstock side workpiece to be welded, an internal blowing assembly, an internal heating assembly and an external heating assembly, wherein the spindle side box is installed on one side of the bed, the movable slide box is slidably installed on the other side of the bed through a movable slide track, the spindle side fixture is installed in the spindle side box through the spindle fixed seat, the spindle side workpiece to be welded is clamped and fixed by the spindle side fixture, the external blowing assembly is arranged on the outside of the welding area of ​​the spindle side workpiece to be welded, the tailstock side fixture is installed in the movable slide box through the tailstock fixed seat, the tailstock side workpiece to be welded is clamped and fixed by the tailstock side fixture, the internal heating assembly is sleeved on the outside of the internal blowing assembly, and the internal heating assembly and the external heating assembly are respectively arranged on the inside and outside sides of the tailstock side workpiece to be welded.

[0007] Furthermore, the external blowing assembly includes a driving mechanism, a blowing support, a guide rail, a cylinder, a connecting rod, a semi-ring bracket and a blowing head. The blowing support is connected to the driving mechanism, the fixed end of the cylinder is installed on the blowing support, and the telescopic end is connected to the semi-ring bracket. Guide rails are provided on both sides of the cylinder, and a support plate is installed on the top of the guide rail. Both sides of the semi-ring bracket are connected to the support plate through connecting rods, and a number of blowing heads are evenly distributed in a ring on the inner side of the semi-ring bracket, and the several blowing heads are connected to the semi-ring bracket through the blowing head support.

[0008] Furthermore, the driving mechanism includes a motor and a lead screw, the blowing support is threadedly connected to the lead screw, and the lead screw is connected to the output shaft of the motor and is installed on the bed.

[0009] Furthermore, a direction-adjusting connecting rod is connected to the middle of the blowing head, and the direction-adjusting connecting rod is connected to the inner side of the semi-ring bracket through a locking nut.

[0010] Furthermore, the internal blowing assembly includes an internal nozzle, a connecting pipe, an elbow and a telescopic mechanism, the internal nozzle is connected to the connecting pipe, the connecting pipe is connected to the air source through the elbow, the telescopic mechanism is connected to one side of the elbow through a connecting rod, and the internal heating assembly is arranged on the outside of the internal nozzle.

[0011] Furthermore, a control valve is provided on the pipeline connecting the connecting pipe and the gas source.

[0012] Furthermore, the external heating component includes a heating component support seat, a fine-tuning slide and a heating tube, the heating tube is installed on the fine-tuning slide, the circular part of the heating tube is arranged on the outer side of the workpiece to be welded on the tail seat side, the fine-tuning slide is installed on the heating component support seat, and the heating component support seat is connected to the movable slide box.

[0013] Furthermore, a temperature measuring component is provided at the connection portion between the fine-tuning slide and the heating tube.

[0014] Furthermore, the motor, internal heating component, direction adjustment connecting rod, telescopic mechanism, control valve, heating tube, fine-tuning slide and temperature measuring component are all connected to the control system.

[0015] Furthermore, a working method for a friction welding auxiliary processing device for a thick-walled annular tube component is characterized in that it comprises the following steps:

[0016] Step 1: Before welding, clamp and fix the workpiece on the spindle side with the spindle side fixture, and clamp and fix the workpiece on the tailstock side with the tailstock side fixture;

[0017] Step 2: Control the external blowing assembly, the internal blowing assembly, the internal heating assembly, and the external heating assembly to move to the welding areas of the workpiece to be welded on the spindle side and the workpiece to be welded on the tailstock side through the control system;

[0018] Step 3: Control the internal heating component and the external heating component to preheat the welding area;

[0019] Step 4: After preheating, start welding the workpiece on the spindle side and the workpiece on the tailstock side;

[0020] Step 5: After welding, continue to control the internal heating component and the external heating component to continue heating, keep the welded joint warm, and complete the welding process after the welded joint is stably formed.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. Since workpieces with large diameters and thick walls have thermal permeability problems, and simple external heating or internal heating cannot solve the thermal permeability problem, the internal temperature is high after welding, and the external temperature cools down, resulting in uneven overall temperature, which makes the material weld structure uneven. In the present invention, an internal heating component and an external heating component are provided to control the temperature of the inner and outer rings of the parts to be welded by internal and external heating, thereby ensuring the uniformity of the material weld structure and improving the uniformity of the overall performance of the weld.

[0023] 2. Since large diameter and high thickness workpieces often produce temperature gradients during welding due to their huge size, heating components are installed on the outside and inside to work in coordination to ensure a more uniform temperature distribution of the welding temperature, which helps to reduce the generation of thermal stress and avoid surface cracks on the inner and outer rings of the weld due to temperature differences or too fast cooling after welding. Uniform heating can ensure uniform deformation and heat distribution of the material during welding, thereby improving welding quality and consistency, which is especially important for the welding of large industrial components.

[0024] 3. The present invention is provided with an internal heating component and an external heating component. During the welding process, the inner ring and the outer ring of the parts to be welded are heated and the temperature is controlled at the same time to ensure the integrity and strength of the weld, and at the same time the welding speed can be accelerated. By heating the workpiece to the required temperature in advance, the friction heat effect of friction welding can achieve the ideal welding conditions more quickly, thereby reducing the overall welding time and improving production efficiency.

[0025] 4. The coordinated use of the external and internal heating components of the present invention can more accurately control the temperature and heat distribution during the welding process, which is very important for ensuring stability and controllability during the welding process, especially in complex structures of large diameter and thick materials. Uniform heating can help reduce defects that may occur during the welding process. By accurately controlling the temperature of the welding area, the risk of these defects can be reduced and the welding quality can be improved.

[0026] 5. After welding is completed, the present invention can continue to insulate the weld joint through internal and external heating components, so that its temperature can be slowly reduced, the growth and recrystallization process of the grains can be promoted, and the grain structure of the weld area can be improved to make it more uniform, thereby improving the strength and toughness of the overall weld joint.

[0027] 6. Heating the weld after welding can reduce the final heat treatment process in the friction welding process, reduce process steps and improve work efficiency.

[0028] 7. The present invention provides internal and external blowing components inside and outside the welding area. The external spraying of shielding gas can form a protective layer during welding to prevent the metal at the weld from oxidizing with oxygen in the surrounding air, thereby maintaining the purity of the metal at the weld and reducing the formation of an oxide layer, thereby improving welding quality.

[0029] 8. When the present invention performs friction welding on workpieces with large diameters and high thicknesses, external and internal protective gas protection is performed simultaneously, which can prevent the friction heat caused by high temperature and friction during the friction welding process from causing oxidation of the workpiece surface. The external protective gas can prevent oxygen in the air from entering the welding area, reducing the risk of oxidation.

[0030] 9. The external spraying of protective gas in the present invention can prevent the welding area from being polluted by the external environment, help reduce the pollution of the welding joint surface, keep the welding area clean, and improve the welding quality.

[0031] 10. The present invention can reduce the spark splashing generated during the welding process by spraying protective gas inside and outside. The inert gas barrier formed around the welding joint can effectively suppress the generation of sparks, improve the safety of the working environment, and provide a good welding environment, reduce the impact of external environmental factors on the welding joint, reduce the factors that may occur during the welding process, and improve the quality and reliability of the welding joint.

[0032] 11. The present invention can adjust the position of the heating component at any time. Since the weld position changes during the welding process, the position of the heating component can be controlled by the telescopic cylinder so that the heating component always remains consistent with the weld position, thereby improving the temperature stability at the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0034] Figure 1 A schematic diagram of a friction welding auxiliary processing device for thick-walled annular tube parts Figure 1 ;

[0035] Figure 2 A schematic diagram of a friction welding auxiliary processing device for thick-walled annular tube parts Figure 2 ;

[0036] Figure 3 It is an enlarged schematic diagram of an external heating component and an internal heating component;

[0037] Figure 4 It is a schematic diagram of the structure of the external blowing assembly;

[0038] Figure 5 This is an enlarged schematic diagram of the external blowing assembly.

[0039] 1-spindle side box, 2-spindle fixed seat, 3-spindle side fixture, 4-external blowing assembly, 5-spindle side to be welded, 6-movable slide box, 7-bed, 8-movable slide rail, 9-heating assembly support seat, 10-fine-tuning slide, 11-temperature measuring assembly, 12-heating tube, 13-tailstock side fixture, 14-tailstock fixed seat, 15-tailstock side to be welded, 401-motor, 402-screw, 403-blowing support, 404-guide rail, 405-cylinder, 406-connecting rod, 407-semi-ring bracket, 408-blowing head, 409-blowing head support, 410-direction adjustment connecting rod, 411-locking nut, 16-internal nozzle, 17-internal heating assembly, 18-connecting pipe, 19-elbow, 20-connecting rod, 21-telescopic mechanism. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0041] See also Figure 1-5 The present embodiment is described as an auxiliary processing device for friction welding of thick-walled annular tube components, comprising a spindle side box 1, a spindle side fixture 3, an external blowing assembly 4, a spindle side workpiece 5, a movable slide box 6, a bed 7, a tailstock fixed seat 14, a tailstock side workpiece 15, an internal blowing assembly, an internal heating assembly 17 and an external heating assembly, wherein the spindle side box 1 is mounted on one side of the bed 7, the movable slide box 6 is slidably mounted on the other side of the bed 7 via a movable slide rail 8, and the spindle side fixture 3 is mounted via a spindle fixed seat 14. The fixed seat 2 is installed in the spindle side box 1, the spindle side workpiece 5 to be welded is clamped and fixed by the spindle side clamp 3, the external blowing assembly 4 is arranged on the outside of the welding area of ​​the spindle side workpiece 5 to be welded, the tailstock side clamp 13 is installed in the movable slide box 6 through the tailstock fixed seat 14, the tailstock side workpiece 15 to be welded is clamped and fixed by the tailstock side clamp 13, the internal heating assembly 17 is sleeved on the outside of the internal blowing assembly, and the internal heating assembly 17 and the external heating assembly are respectively arranged on the inner and outer sides of the tailstock side workpiece 15 to be welded.

[0042] Before welding, the spindle side workpiece 5 to be welded is clamped and fixed by the spindle side clamp 3, and the tailstock side workpiece 15 to be welded is clamped and fixed by the tailstock side clamp 13. The external blowing component 4, the internal blowing component, the internal heating component 17 and the external heating component are controlled by the control system to move to the welding area of ​​the spindle side workpiece 5 and the tailstock side workpiece 15, and the internal heating component 17 and the external heating component are controlled to preheat the welding area. After preheating, welding of the spindle side workpiece 5 and the tailstock side workpiece 15 is started. After welding, the internal heating component 17 and the external heating component are continued to be controlled to heat continuously, and the weld joint after welding is kept warm. After the weld joint is stably formed, the welding process is completed.

[0043] Since workpieces with large diameters and thick walls have thermal permeability problems, and simple external heating or internal heating cannot solve the thermal permeability problem, the internal temperature is high after welding and the external temperature cools, resulting in uneven overall temperature, which makes the material weld structure uneven. Therefore, the present invention provides an internal heating component and an external heating component, and controls the temperature of the inner and outer rings of the parts to be welded by internal and external heating, thereby ensuring the uniformity of the material weld structure and improving the uniformity of the overall performance of the weld. The heating components are provided externally and internally to work in coordination to ensure a more uniform temperature distribution of the welding temperature, which helps to reduce the generation of thermal stress and avoid deformation and cracks caused by temperature differences. Uniform heating can ensure uniform deformation and heat distribution of the material during welding, thereby improving welding quality and consistency, which is especially important for the welding of large industrial components. It is important that by providing an internal heating component and an external heating component, the inner ring and the outer ring of the parts to be welded are heated and temperature controlled simultaneously during the welding process to ensure the integrity and strength of the weld, and at the same time the welding speed can be accelerated. By heating the workpiece to the required temperature in advance, the frictional heat effect of friction welding can achieve the ideal welding conditions more quickly, thereby reducing the overall welding time and improving production efficiency. The coordinated use of the external and internal heating components of the present invention can more accurately control the temperature and heat distribution during the welding process, which is very important for ensuring stability and controllability during the welding process, especially in complex structures of large diameter and thick materials. Uniform heating can help reduce defects that may occur during the welding process. By accurately controlling the temperature of the welding area, the risk of these defects can be reduced and the welding quality can be improved.

[0044] In addition, an external blowing component is provided on the outside of the welding area. The external spraying of shielding gas can form a protective layer during the welding process to prevent the metal at the weld from oxidizing with the oxygen in the surrounding air, maintain the purity of the metal at the weld, reduce the formation of an oxide layer, and thus improve the welding quality. After the welding is completed, the welding joint can continue to be insulated by the internal and external heating components, so that its temperature can be slowly reduced, and the growth and recrystallization process of the grains can be promoted. The grain structure in the weld area can be improved to make it more uniform, thereby improving the toughness of the welding joint. When the present invention performs friction welding on workpieces with large diameters and high thicknesses, external and internal shielding gas protection is performed at the same time, so that the friction heat caused by high temperature and friction during the friction welding process can be prevented from causing oxidation of the workpiece surface. The external shielding gas can prevent oxygen in the air from entering the weld The welding area can reduce the risk of oxidation. Internal spraying of shielding gas can prevent oxidation inside the weld. External spraying of shielding gas can prevent the welding area from being polluted by the external environment, which helps to reduce the contamination of the welding joint surface, keep the welding area clean, and improve the welding quality. External spraying of shielding gas can reduce the spark splashing generated during welding. The inert gas barrier formed around the welding joint can effectively suppress the generation of sparks, improve the safety of the working environment, and provide a good welding environment, reduce the impact of external environmental factors on the welding joint, reduce the factors that may occur during the welding process, and improve the quality and reliability of the welding joint. During the friction welding process of large diameter and high thickness materials, the welding area may be subjected to higher thermal stress. Internal and external spraying of shielding gas can help alleviate these problems.

[0045] The extension and retraction of the cylinder 405 can adjust the vertical position of the semi-ring bracket 407 relative to the workpiece 5 on the main shaft side, and the jet position can be adjusted according to the height of the workpiece. The driving mechanism can adjust the horizontal position of the semi-ring bracket 407 relative to the workpiece 5 on the main shaft side. The device can adjust the position according to different workpieces to be welded and different welding areas, thereby improving the applicability of the device.

[0046] The driving mechanism includes a motor 401 and a lead screw 402. The blowing support 403 is threadedly connected to the lead screw 402. The lead screw 402 is connected to the output shaft of the motor 401 and is installed on the bed 7. The motor 401 is started to drive the lead screw 402 to rotate. Since the blowing support 403 is threadedly connected to the lead screw 402, reciprocating motion can be performed, so that the semi-ring bracket 407 can reciprocate and adjust different positions as needed.

[0047] A direction-adjusting connecting rod 410 is connected to the middle of the blowing head 408, and the direction-adjusting connecting rod 410 is connected to the inner side of the semi-ring bracket 407 through a locking nut 411. By providing the direction-adjusting connecting rod 410, the jet angle of the blowing head 408 can be adjusted, and the most suitable jet angle can be used for jetting, thereby further improving the protective effect of the device on the weld area.

[0048] The internal blowing assembly includes an internal nozzle 16, a connecting pipe 18, an elbow 19 and a telescopic mechanism 21. The internal nozzle 16 is connected to the connecting pipe 18, and the connecting pipe 18 is connected to the air source through the elbow 19. The telescopic mechanism 21 is connected to one side of the elbow 19 through a connecting rod 20. The internal heating assembly 17 is arranged on the outside of the internal nozzle 16.

[0049] A control valve is provided on the pipeline connecting the connecting pipe 18 and the gas source.

[0050] The internal blowing gas controls the shielding gas content entering the internal nozzle 16 through a control valve, and the internal nozzle 16 is driven to move to the welding area through the telescopic mechanism 21, and the shielding gas is sprayed out through the internal nozzle 16.

[0051] The external heating component includes a heating component support seat 9, a fine-tuning slide 10 and a heating tube 12. The heating tube 12 is installed on the fine-tuning slide 10. The circular part of the heating tube 12 is arranged on the outer side of the workpiece 15 to be welded on the tail seat side. The fine-tuning slide 10 is installed on the heating component support seat 9. The heating component support seat 9 is connected to the movable slide box 6. Before and after welding, the heating tube 12 is energized to preheat the welding area and keep it warm after welding.

[0052] A temperature measuring component 11 is provided at the connection portion between the fine-tuning slide 10 and the heating tube 12 .

[0053] The fine-tuning slide 10 can be adjusted according to different positions of the weld, and the most suitable heating position can be selected for heating, thereby further improving the mechanical properties and toughness of the welded joint.

[0054] The heating fine-tuning slide 10 is provided with a temperature measuring component 11, through which the preheating temperature and the temperature required for post-welding insulation can be monitored in real time to ensure the temperature stability of preheating and insulation.

[0055] The motor 401, the internal heating component 17, the direction adjustment connecting rod 410, the telescopic mechanism 21, the control valve, the heating tube 12, the fine-tuning slide 10 and the temperature measuring component 11 are all connected to the control system.

[0056] A working method of a friction welding auxiliary processing device, which comprises the following steps:

[0057] Step 1: Before welding, the workpiece 5 on the spindle side is clamped and fixed by the spindle side fixture 3, and the workpiece 15 on the tailstock side is clamped and fixed by the tailstock side fixture 13;

[0058] Step 2: Control the external blowing assembly 4, the internal blowing assembly, the internal heating assembly 17 and the external heating assembly to move to the welding area of ​​the workpiece 5 on the spindle side and the workpiece 15 on the tailstock side through the control system;

[0059] Step 3: Control the internal heating component 17 and the external heating component to preheat the welding area;

[0060] Step 4: After preheating, start welding the workpiece 5 on the spindle side and the workpiece 15 on the tailstock side;

[0061] Step 5: After welding, continue to control the internal heating component 17 and the external heating component to continue heating to keep the welded joint warm. After the welded joint is stably formed, the welding process is completed.

[0062] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. A friction welding auxiliary processing device for thick-walled annular pipe parts, characterized in that: The invention comprises a spindle side box (1), a spindle side fixture (3), an external blowing assembly (4), a spindle side workpiece to be welded (5), a movable slide box (6), a bed (7), a tailstock fixing seat (14), a tailstock side workpiece to be welded (15), an internal blowing assembly, an internal heating assembly (17) and an external heating assembly, wherein the spindle side box (1) is installed on one side of the bed (7), the movable slide box (6) is slidably installed on the other side of the bed (7) via a movable slide rail (8), and the spindle side fixture (3) is installed on the spindle side box via a spindle fixing seat (2). (1), the spindle side workpiece (5) to be welded is clamped and fixed by the spindle side clamp (3), the external blowing assembly (4) is arranged on the outside of the welding area of ​​the spindle side workpiece (5), the tailstock side clamp (13) is installed in the movable slide box (6) through the tailstock fixing seat (14), the tailstock side workpiece (15) to be welded is clamped and fixed by the tailstock side clamp (13), the internal heating assembly (17) is sleeved on the outside of the internal blowing assembly, and the internal heating assembly (17) and the external heating assembly are respectively arranged on the inside and outside sides of the tailstock side workpiece (15).

2. The friction welding auxiliary processing device for thick-walled annular pipe parts according to claim 1 is characterized in that: The external blowing assembly (4) comprises a driving mechanism, a blowing support (403), a guide rail (404), a cylinder (405), a connecting rod (406), a semi-ring bracket (407) and a blowing head (408). The blowing support (403) is connected to the driving mechanism. The fixed end of the cylinder (405) is mounted on the blowing support (403), and the telescopic end is connected to the semi-ring bracket (407). Guide rails (404) are arranged on both sides of the cylinder (405). A support plate is installed on the top of the guide rail (404). Both sides of the semi-ring bracket (407) are connected to the support plate via a connecting rod (406). A plurality of blowing heads (408) are evenly distributed in a ring shape on the inner side of the semi-ring bracket (407). The plurality of blowing heads (408) are connected to the semi-ring bracket (407) via a blowing head support (409).

3. The friction welding auxiliary processing device for thick-walled annular pipe parts according to claim 2 is characterized in that: The driving mechanism comprises a motor (401) and a lead screw (402); the blowing support (403) is threadedly connected to the lead screw (402); the lead screw (402) is connected to the output shaft of the motor (401) and is mounted on the bed (7).

4. The friction welding auxiliary processing device for thick-walled annular pipe parts according to claim 3 is characterized in that: A direction-adjusting connecting rod (410) is connected to the middle of the blowing head (408), and the direction-adjusting connecting rod (410) is connected to the inner side of the semi-ring bracket (407) via a locking nut (411).

5. The friction welding auxiliary processing device for thick-walled annular pipe parts according to claim 4 is characterized in that: The internal blowing assembly comprises an internal nozzle (16), a connecting pipe (18), an elbow (19) and a telescopic mechanism (21); the internal nozzle (16) is connected to the connecting pipe (18); the connecting pipe (18) is connected to an air source via the elbow (19); the telescopic mechanism (21) is connected to one side of the elbow (19) via a connecting rod (20); and the internal heating assembly (17) is arranged on the outside of the internal nozzle (16).

6. The friction welding auxiliary processing device for thick-walled annular pipe parts according to claim 5 is characterized in that: A control valve is provided on the pipeline connecting the connecting pipe (18) and the gas source.

7. The friction welding auxiliary processing device for thick-walled annular pipe parts according to claim 6 is characterized in that: The external heating component comprises a heating component support seat (9), a fine-tuning slide (10) and a heating tube (12); the heating tube (12) is mounted on the fine-tuning slide (10); a circular portion of the heating tube (12) is arranged on the outer side of a workpiece to be welded (15) on the tailstock side; the fine-tuning slide (10) is mounted on the heating component support seat (9); and the heating component support seat (9) is connected to a movable slide box (6).

8. The friction welding auxiliary processing device for thick-walled annular pipe parts according to claim 7 is characterized in that: A temperature measuring component (11) is provided at the connection portion between the fine-tuning slide table (10) and the heating tube (12).

9. The friction welding auxiliary processing device for thick-walled annular pipe parts according to claim 8, characterized in that: The motor (401), the internal heating component (17), the direction adjustment connecting rod (410), the telescopic mechanism (21), the control valve, the heating tube (12), the fine-tuning slide (10) and the temperature measuring component (11) are all connected to a control system.

10. A working method for the friction welding auxiliary processing device for thick-walled annular pipe parts according to claim 9, characterized in that: It includes the following steps: Step 1: Before welding, the workpiece to be welded (5) on the spindle side is clamped and fixed by the spindle side clamp (3), and the workpiece to be welded (15) on the tailstock side is clamped and fixed by the tailstock side clamp (13); Step 2: Control the external blowing assembly (4), the internal blowing assembly, the internal heating assembly (17) and the external heating assembly to move to the welding area of ​​the spindle side workpiece (5) and the tailstock side workpiece (15) through the control system; Step 3: Controlling the internal heating component (17) and the external heating component to preheat the welding area; Step 4: After preheating, start welding the workpiece to be welded on the spindle side (5) and the workpiece to be welded on the tailstock side (15); Step 5: After welding, the internal heating component (17) and the external heating component are continuously controlled to heat the welded joint, and the welding process is completed after the welded joint is stably formed.

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