Friction welding equipment of gantry structure

Abstract

The utility model relates to the technical field of friction welding, in particular to friction welding equipment with a gantry structure, which comprises a base, an n-shaped frame and a welding device, a first displacement device is mounted in the middle of the base, and a worktable is mounted at the movable end of the first displacement device; two stand columns of the n-shaped frame are installed on the two sides of the base respectively, a second displacement device is installed on a cross beam of the n-shaped frame, a third displacement device is installed at the movable end of the second displacement device, and the welding device is installed at the movable end of the third displacement device and used for welding a workpiece to be processed on the workbench. In conclusion, the gantry structure is adopted, the layout of the displacement device is optimized, the stability of the base and the n-shaped frame is ingeniously utilized, and the defects of traditional equipment in the aspects of stability, operation convenience, maintenance cost and bearing capacity are effectively overcome.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of friction welding, especially to a friction welding equipment of gantry structure. BACKGROUND

[0002] In modern manufacturing industry, welding technology is one of the important processes to realize component connection and structural integrity. As a high-efficiency and environmentally friendly welding method, friction welding has attracted widespread attention due to its need for no filler material and high energy utilization rate in the welding process. Traditional welding equipment often has problems such as insufficient stability, complex operation and difficult maintenance, which limits its application in large-scale production.

[0003] Traditional friction welding equipment, especially when dealing with large or heavy workpieces, often faces the following challenges:

[0004] Insufficient equipment stability: Some structural designs cause the equipment to vibrate or deform easily during the welding process, affecting the welding quality and precision. This is usually related to the rigidity, load-carrying capacity, force structure design and stability of the displacement device of the equipment.

[0005] High operation complexity: In order to realize the precise movement of the workpiece in three directions (X, Y, Z axis), a complex control system and multi-axis linkage are required, which increases the operation difficulty and error probability. The operation control is relatively complex, which requires skilled operators and is prone to operation errors.

[0006] High maintenance cost and low efficiency: Complex structural design and moving parts increase the difficulty and cost of equipment maintenance. The equipment structure is complex, maintenance is difficult, professional personnel are needed for operation, and the downtime is long, which increases the maintenance cost and reduces the production efficiency.

[0007] Limited load-carrying capacity: The unreasonable force structure and uneven distribution of stress points cause some components to bear excessive pressure, which shortens the service life and increases the risk of equipment failure. Moreover, the load-carrying capacity of some equipment is limited, which makes it difficult to meet the welding needs of large workpieces.

[0008] Therefore, it is an urgent need in the industry to develop a friction welding equipment with high stability, simple operation, convenient maintenance and cost-effectiveness. SUMMARY

[0009] The utility model aims to provide a technical solution that can solve the above problems.

[0010] The utility model provides a friction welding equipment of gantry structure, including base, H frame and welding device, the middle part of base is equipped with first displacement device, and the movable end of first displacement device is equipped with workstation, two columns of H frame are installed in the both sides of base respectively, and the crossbeam of H frame is equipped with second displacement device, and the movable end of second displacement device is equipped with third displacement device, welding device is installed in the movable end of third displacement device, is used for carrying out welding operation to the workpiece on the workstation.

[0011] As a further scheme of the utility model: the first displacement device is equipped with first guide rail, first sliding block, first screw rod and first motor, first guide rail and first motor are installed in base respectively, one side of first sliding block and first guide rail match with each other, form sliding connection, and its other side is fixedly connected to workstation, first screw rod is rotatably connected to base, and forms transmission connection with first motor, and the screw nut of first screw rod is fixedly connected to workstation.

[0012] As a further scheme of the utility model: the third displacement device is equipped with displacement sliding plate, the second displacement device is equipped with second guide rail, second sliding block, second screw rod and second motor, second guide rail and second motor are installed in the crossbeam of H frame respectively, one side of second sliding block and second guide rail match with each other, form sliding connection, and its other side is fixedly connected to displacement sliding plate, second screw rod is rotatably connected to crossbeam, and forms transmission connection with second motor, and the screw nut of second screw rod is fixedly connected to displacement sliding plate.

[0013] As a further scheme of the utility model: the second guide rail is equipped with lateral support rail and forward support rail, the lateral support rail is fixedly connected to the side of crossbeam facing third position device, the forward support rail is fixedly connected to the top of crossbeam, the section of displacement sliding plate is set as L shape, so that one end of displacement sliding plate is fixedly connected to lateral sliding block on lateral support rail, and the other end is fixedly connected to forward sliding block on forward support rail.

[0014] As a further scheme of the utility model: one end of displacement sliding plate connecting forward support rail is equipped with sliding plate pressing plate, the part of crossbeam corresponding to sliding plate pressing plate is equipped with anti -drop long strip, so that one end of sliding plate pressing plate is fixedly connected to displacement sliding plate, and the other end is abutted to anti -drop long strip, and can slide along anti -drop long strip.

[0015] As a further scheme of the utility model: the welding device is equipped with machine head backing plate, the third displacement device is further equipped with third guide rail, third sliding block, third screw rod and third motor, third guide rail and third motor are installed in displacement sliding plate respectively, one side of third sliding block and third guide rail match with each other, form sliding connection, and its other side is fixedly connected to machine head backing plate, third screw rod is rotatably connected to displacement sliding plate, and forms transmission connection with third motor, and the screw nut of third screw rod is fixedly connected to machine head backing plate.

[0016] As a further scheme of the utility model: the welding device is further equipped with a main shaft motor, a shaft coupling and a friction main shaft, the main shaft motor is installed on the machine head supporting plate, one end of the shaft coupling is fixedly connected to the output end of the main shaft motor, and the other end is fixedly connected to the friction main shaft.

[0017] As a further scheme of the utility model: the welding device is further equipped with a rotary assembly, the rotary assembly is equipped with a supporting inner ring, an outer ring gear, an outer ring turntable, a rotary motor and a rotary gear, the supporting inner ring and the rotary motor are fixedly connected to the machine head supporting plate respectively, the rotary gear is fixedly connected to the output end of the rotary motor, one end of the outer ring turntable is fixedly connected to the outer ring gear, and the other end is fixedly connected to the main shaft mounting seat of the friction main shaft, and rotation connection is formed between the main shaft mounting seat and the friction main shaft; the outer ring gear is rotationally connected to the supporting inner ring and is in meshing connection with the rotary gear.

[0018] Compared with the prior art, the utility model has the advantages that:

[0019] The device provides higher stability and rigidity through the combination design of the base, the H-shaped frame and the welding device. The first displacement device in the middle part of the base enables the workbench to move horizontally and linearly, thereby avoiding the movement of the welding device itself on the X-axis and simplifying the operation process of the device. In addition, the design of the H-shaped frame ensures the stability of the cross beam, enabling the second displacement device and the third displacement device to work effectively in cooperation to achieve precise movement on the Y-axis and the Z-axis.

[0020] The advantage of this structure is that it can withstand larger and heavier workpieces to be processed, while optimizing the stress structure of the device, reducing machine vibration and deformation, and improving machining precision and stability. Compared with other structural forms, the gantry structure is more convenient to maintain and maintain, and the component replacement is relatively easy, which reduces maintenance cost and downtime, thereby improving production efficiency.

[0021] By adopting the gantry structure, optimizing the displacement device layout, and skillfully utilizing the stability of the base and the H-shaped frame, the deficiencies of traditional equipment in stability, operation convenience, maintenance cost and load capacity are effectively solved. A more reliable and efficient solution is provided for the welding process, which meets the needs of modern manufacturing industry for high precision, high efficiency and low maintenance cost.

[0022] Additional aspects and advantages of the utility model will be partially given in the following description, some will become apparent from the following description, or will be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 is the overall structure schematic diagram of the present application;

[0025] Figure 2 is the structure schematic diagram of the base and the H-shaped frame of the present application;

[0026] Figure 3 is the lateral schematic diagram of the overall structure of the present application;

[0027] Figure 4 is the structure schematic diagram of the third displacement device and the welding device of the present application;

[0028] Figure 5 is the structure schematic diagram of the rotary assembly of the present application.

[0029] The reference signs and names in the drawings are as follows:

[0030] 10 base; 11 workbench; 20 H-shaped frame; 21 column; 22 cross beam; 23 anti-dropping long strip; 30 first displacement device; 31 first guide rail; 32 first sliding block; 33 first screw rod; 34 first motor; 40 second displacement device; 41 second guide rail; 42 lateral support rail; 43 forward support rail; 44 second sliding block; 45 lateral sliding block; 46 forward sliding block; 47 second screw rod; 48 second motor; 50 third displacement device; 51 displacement sliding plate; 52 sliding plate pressing plate; 53 third guide rail; 54 third sliding block; 55 third screw rod; 56 third motor; 60 welding device; 61 machine head supporting plate; 62 main shaft motor; 63 coupling; 64 friction main shaft; 70 rotary assembly; 71 supporting inner ring; 72 outer ring gear; 73 outer ring turntable; 74 rotary motor; 75 rotary gear; 76 rotating shaft support; 77 rotating shaft pin. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] Please refer to Figures 1 to 5The utility model discloses a friction welding equipment of portal structure, including base 10, bracket 20 and welding device 60, the middle part of base 10 is installed with first displacement device 30, and the movable end of first displacement device 30 is installed with workstation 11, the two columns 21 of bracket 20 are installed on the both sides of base 10 respectively, and the beam 22 of bracket 20 is installed with second displacement device 40, and the movable end of second displacement device 40 is installed with third displacement device 50, welding device 60 is installed on the movable end of third displacement device 50, is used to carry out the welding operation to the workpiece on workstation 11 for processing.

[0033] Specifically, using portal structure, just can make the beam 22 of bracket 20 be located above base 10, and the middle part of base 10 is equipped with workstation 11, and first displacement device 30 is equipped between workstation 11 and base 10, and workstation 11 carries out linear motion on the horizontal direction through first displacement device 30. That is, welding device 60 on the beam 22 can not carry out linear motion on the horizontal direction of X axis, directly using first displacement device 30 on base 10 can drive workstation 11 to carry out linear motion on the horizontal direction of X axis, realizes the transverse movement of workpiece for processing, and completes the friction welding operation of workpiece for processing.

[0034] Secondly, since first displacement device 30 is directly arranged on the stable base 10, therefore has higher stability, also can bear larger and heavier workpiece for processing, so also can optimize the stress structure of entire equipment and displacement device, can provide stable support and rigidity in the processing, thereby effectively reducing machine tool vibration and deformation, improve the precision and stability of processing. And convenient for operator to operate and maintain, compared with other structure form machine tool, the maintenance and maintenance of portal structure are relatively simple, and the replacement parts are relatively easy. Easy to maintain and maintain, this helps to reduce the maintenance cost and downtime of machine tool, improves production efficiency.

[0035] Thirdly, still including second displacement device 40 and third displacement device 50, second displacement device 40 is directly installed on the beam 22 of bracket 20, since bracket 20 is directly fixed to the ground or base 10, therefore has stronger stability. Third displacement device 50 is installed on the movable end of second displacement device 40, so that second displacement device 40 drives third displacement device 50 to carry out linear motion on the vertical direction of Y axis, welding device 60 is installed on the movable end of third displacement device 50, so that welding device 60 carries out linear motion on the vertical direction of Z axis through third displacement device 50, and workstation 11 carries out linear motion on the horizontal direction of X axis in combination with first displacement device 30, and then facilitate to carry out welding operation in various directions to workpiece on workstation 11 for processing.

[0036] As Figure 1 andFigure 2 Preferably, the first displacement device 30 is provided with a first guide rail 31, a first sliding block 32, a first lead screw 33 and a first motor 34. The first guide rail 31 and the first motor 34 are respectively installed on the base 10. One side of the first sliding block 32 is matched with the first guide rail 31 to form a sliding connection, and the other side is fixedly connected to the workbench 11. The first lead screw 33 is rotationally connected to the base 10 and is in transmission connection with the first motor 34. The screw nut of the first lead screw 33 is fixedly connected to the workbench 11.

[0037] Specifically, the first guide rail 31 and the first sliding block 32 form a linear sliding mechanism, so that the workbench 11 can move stably on the base 10. Meanwhile, the first motor 34 and the first lead screw 33 are matched to linearly drive the workbench 11, so that it can move in the X-axis direction. The first lead screw 33 is rotationally connected to the base 10 through a lead screw bearing seat and a bearing. The first motor 34 is installed on the base 10 through a corresponding motor bearing seat and is in transmission connection with the first lead screw 33.

[0038] As Figure 2 and Figure 3 Preferably, the third displacement device 50 is provided with a displacement sliding plate 51, and the second displacement device 40 is provided with a second guide rail 41, a second sliding block 44, a second lead screw 47 and a second motor 48. The second guide rail 41 and the second motor 48 are respectively installed on the cross beam 22 of the frame 20. One side of the second sliding block 44 is matched with the second guide rail 41 to form a sliding connection, and the other side is fixedly connected to the displacement sliding plate 51. The second lead screw 47 is rotationally connected to the cross beam 22 and is in transmission connection with the second motor 48. The screw nut of the second lead screw 47 is fixedly connected to the displacement sliding plate 51.

[0039] Specifically, the second guide rail 41 and the second sliding block 44 form a linear sliding mechanism, so that the displacement sliding plate 51 can move stably on the cross beam 22. Meanwhile, the second motor 48 and the second lead screw 47 are matched to linearly drive the displacement sliding plate 51, so that it can move in the Y-axis direction. The second lead screw 47 is rotationally connected to the cross beam 22 through a lead screw bearing seat and a bearing. The second motor 48 is installed on the cross beam 22 through a corresponding motor bearing seat and is in transmission connection with the second lead screw 47.

[0040] As Figure 3 and Figure 4Said preferably, the second guide rail 41 is provided with a lateral support rail 42 and a forward support rail 43, the lateral support rail 42 is fixedly connected to one side of the cross beam 22 facing the third position device, and the forward support rail 43 is fixedly connected to the top of the cross beam 22. The cross section of the displacement slide plate 51 is L-shaped, so that one end of the displacement slide plate 51 is fixedly connected to the lateral slide block 45 on the lateral support rail 42, and the other end is fixedly connected to the forward slide block 46 on the forward support rail 43.

[0041] Specifically, in order to further improve the load capacity and stability of the second displacement device 40, a lateral support rail 42 can be provided on the side wall of the cross beam 22 to support the end of the displacement slide plate 51 close to the welding device 60, so that the displacement slide plate 51 can transfer most of the weight of the welding device 60 to the lateral support rail 42, and a stable longitudinal linear movement is formed by the cooperation of the lateral slide block 45 and the lateral support rail 42.

[0042] As Figure 1 and Figure 3 Said preferably, one end of the displacement slide plate 51 connected to the forward support rail 43 is provided with a slide plate pressing plate 52, and the cross beam 22 is provided with a anti-falling long strip 23 corresponding to the position of the slide plate pressing plate 52, so that one end of the slide plate pressing plate 52 is fixedly connected to the displacement slide plate 51, and the other end abuts against and slides along the anti-falling long strip 23.

[0043] Specifically, in order to prevent the displacement slide plate 51 from tilting or falling in the direction of the welding device 60, a slide plate pressing plate 52 can also be provided on the displacement slide plate 51, and the anti-falling long strip 23 on the cross beam 22 is used to limit the slide plate pressing plate 52, so that the slide plate pressing plate 52 cooperates with the anti-falling long strip 23 to limit and protect the displacement slide plate 51. It can be understood that in order to make the sliding between the slide plate pressing plate 52 and the anti-falling long strip 23 more smooth, an easy-sliding material can be provided between them to increase the sliding property. For example, polytetrafluoroethylene material, ceramic particles or metal oxides, etc. In order to further enhance the stability, lateral and forward support rails 43 and anti-falling devices are also added to fix and protect the moving parts.

[0044] As Figure 3 and Figure 4 Said preferably, the welding device 60 is provided with a torch supporting plate 61, and the third displacement device 50 is further provided with a third guide rail 53, a third slide block 54, a third lead screw 55 and a third motor 56. The third guide rail 53 and the third motor 56 are respectively installed on the displacement slide plate 51. One side of the third slide block 54 cooperates with the third guide rail 53 to form a sliding connection, and the other side is fixedly connected to the torch supporting plate 61. The third lead screw 55 is rotationally connected to the displacement slide plate 51 and forms a transmission connection with the third motor 56, and the screw nut of the third lead screw 55 is fixedly connected to the torch supporting plate 61.

[0045] Specifically, by the cooperation of the third guide rail 53 and the third sliding block 54, a linear sliding mechanism is formed, so that the machine head supporting plate 61 can move smoothly on the displacement sliding plate 51. At the same time, by the cooperation of the third motor 56 and the third screw rod 55, the machine head supporting plate 61 is linearly driven, so that it can move vertically along the Z-axis. The third screw rod 55 is rotatably connected to the displacement sliding plate 51 through a screw rod bearing seat and a bearing. The third motor 56 is installed on the displacement sliding plate 51 through a corresponding motor bearing seat and is in transmission connection with the third screw rod 55.

[0046] As Figure 4 and Figure 5 Preferably, the welding device 60 is also provided with a main shaft motor 62, a shaft coupling 63 and a friction main shaft 64. The main shaft motor 62 is installed on the machine head supporting plate 61. One end of the shaft coupling 63 is fixedly connected to the output end of the main shaft motor 62, and the other end is fixedly connected to the friction main shaft 64. The welding device 60 is also provided with a rotary assembly 70. The rotary assembly 70 is provided with a supporting inner ring 71, an outer ring gear 72, an outer ring turntable 73, a rotary motor 74 and a rotary gear 75. The supporting inner ring 71 and the rotary motor 74 are respectively fixedly connected to the machine head supporting plate 61. The rotary gear 75 is fixedly connected to the output end of the rotary motor 74. One end of the outer ring turntable 73 is fixedly connected to the outer ring gear 72, and the other end is fixedly connected to the main shaft mounting seat of the friction main shaft 64. The main shaft mounting seat is in rotational connection with the friction main shaft 64. The outer ring gear 72 is rotatably connected to the supporting inner ring 71 and is in meshing connection with the rotary gear 75.

[0047] Specifically, since the friction main shaft 64 needs to be inclined at a certain angle during friction welding, so as to facilitate mobile welding on the workpiece to be processed, a shaft support 76 and a shaft pin 77 can also be provided between the outer ring turntable 73 and the main shaft mounting seat. One end of the shaft support 76 is fixedly connected to the outer ring turntable 73, and the other end is connected to the shaft pin 77. One end of the shaft pin 77 is fixedly connected to the main shaft mounting seat, and the other end is in adjustable fixed connection with the shaft support 76 at a certain angle. Thus, the welding angle of the friction main shaft 64 is adjusted.

[0048] Secondly, because the friction main shaft 64 has a certain inclination angle, when it needs to turn during welding, the rotary assembly 70 is needed to perform rotary operation, so that the inclination angle and the welding direction remain the same. By driving the rotary gear 75 to rotate through the rotary motor 74, the outer ring gear 72 and the outer ring turntable 73 are driven to rotate relative to the supporting inner ring 71, and then the main shaft mounting seat and the friction main shaft 64 are correspondingly rotated, so that the welding direction of the friction welding is changed.

[0049] Example one: friction welding of large workpieces

[0050] In the large ship, aerospace industry, often need to weld large aluminum alloy parts. The traditional welding equipment is difficult to provide enough stability and carrying capacity, resulting in unstable welding quality.

[0051] The embodiment adopts the above-mentioned gantry structure friction welding equipment. The base 10 and the H-shaped frame 20 of the equipment are made of high-strength steel to ensure their stability. The first guide rail 31, the first sliding block 32, the first screw 33 and the first motor 34 of the first displacement device 30 are all optimized to bear the workbench 11 weighing up to 500 kg. The aluminum alloy parts to be welded are placed on the workbench 11, and the first displacement device 30 drives the workbench 11 to realize the transverse movement of the X-axis through the motor.

[0052] The welding device 60 is precisely adjusted on the Z-axis by the third displacement device 50 to ensure that the distance between the welding head and the workpiece remains in the best welding state. The design of the equipment significantly improves the welding precision, reduces the possibility of workpiece deformation, and ensures the strength and quality of the welded joint.

[0053] Example two: welding of complex-shaped workpieces

[0054] In automobile manufacturing, complex-shaped metal workpieces need to be precisely welded. The traditional equipment is inconvenient to operate and prone to errors when welding complex workpieces at multiple angles.

[0055] This embodiment utilizes the flexibility of the gantry structure and is suitable for welding complex workpieces. The design of the second displacement device 40 allows the displacement sliding plate 51 to move smoothly and accurately on the Y-axis, combined with the X-axis movement of the workbench 11 directly by the first displacement device 30, the welding device 60 can weld the workpiece in multiple directions.

[0056] For example, the workpiece to be welded is a complex car body frame. The operator can adjust the position of the workbench 11 and the height of the welding device 60 through the control system to make the welding head weld at different angles, ensuring the welding quality. At the same time, the equipment is easy to maintain, greatly improving the production efficiency.

[0057] Example three: high-precision welding of thin-walled workpieces

[0058] Thin-walled metal workpieces are prone to thermal deformation during welding, resulting in insufficient strength of the welded joint.

[0059] The embodiment adopts the above friction welding equipment to weld thin-walled workpieces. The precise design of the first displacement device 30 and the second displacement device 40 ensures that the vibration and deformation of the equipment are minimized during the welding process. The head support plate 61 of the welding device 60 is fine-tuned in the Z-axis by the third displacement device 50, ensuring uniform contact pressure between the welding head and the workpiece during the welding process.

[0060] In addition, the sliding mechanism of the equipment uses high-precision guide rails and sliding blocks to reduce friction resistance and ensure the stability of the welding process. Through this embodiment, the welding quality of thin-walled workpieces has been significantly improved, and the strength of the welded joints has reached the industry standard.

[0061] Embodiment Four: Automated Welding for Batch Production

[0062] In the manufacturing of electronic products, it is often necessary to weld a large number of small metal components, and traditional equipment cannot achieve efficient automated production.

[0063] The friction welding equipment of this embodiment is equipped with an automated control system, which can achieve batch production. The cooperation of the first displacement device 30 and the second displacement device 40 allows the workbench 11 to quickly move to different welding positions, while the welding device 60 moves up and down in the Z-axis with precision.

[0064] Through programmed control, the equipment can quickly switch between different welding modes to adapt to workpieces of different sizes and shapes. The high efficiency and flexibility of this equipment greatly improve production efficiency, ensuring stable welding quality and meeting the needs of batch production.

[0065] The above embodiments demonstrate the advantages and flexibility of the gantry structure friction welding equipment in different application scenarios, fully embodying its high stability, high precision, and high efficiency in the welding process, meeting the diverse needs of modern manufacturing for welding equipment.

[0066] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be considered exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A friction welding apparatus of portal structure, characterized by, The utility model provides a welding device, including base (10), H-shaped frame (20) and welding device (60), the middle part of base (10) is equipped with first displacement device (30), and the movable end of first displacement device (30) is equipped with workbench (11), two uprights (21) of H-shaped frame (20) are installed to the both sides of base (10) respectively, and the crossbeam (22) of H-shaped frame (20) is equipped with second displacement device (40), and the movable end of second displacement device (40) is equipped with third displacement device (50), and welding device (60) is installed to the movable end of third displacement device (50) and is used to carry out welding operation to the workpiece on workbench (11) for processing.

2. A friction welding apparatus of portal construction according to claim 1, wherein The first displacement device (30) is equipped with first guide rail (31), first sliding block (32), first screw rod (33) and first motor (34), and the first guide rail (31) is installed to the base (10) with the first motor (34) respectively, one side of the first sliding block (32) is matched with the first guide rail (31) each other, forms sliding connection, and the other side is fixedly connected to the workbench (11), and the first screw rod (33) is rotatably connected to the base (10) and is in driving connection with the first motor (34), and the screw nut of the first screw rod (33) is fixedly connected to the workbench (11).

3. A friction welding apparatus of portal construction according to claim 1, wherein The third displacement device (50) is equipped with displacement sliding plate (51), and the second displacement device (40) is equipped with second guide rail (41), second sliding block (44), second screw rod (47) and second motor (48), and the second guide rail (41) is installed to the crossbeam (22) of H-shaped frame (20) with the second motor (48) respectively, one side of the second sliding block (44) is matched with the second guide rail (41) each other, forms sliding connection, and the other side is fixedly connected to the displacement sliding plate (51), and the second screw rod (47) is rotatably connected to the crossbeam (22) and is in driving connection with the second motor (48), and the screw nut of the second screw rod (47) is fixedly connected to the displacement sliding plate (51).

4. A friction welding apparatus of portal construction according to claim 3, wherein The second guide rail (41) is equipped with lateral support rail (42) and positive support rail (43), the lateral support rail (42) is fixedly connected to the side of the crossbeam (22) facing the third position device, the positive support rail (43) is fixedly connected to the top of the crossbeam (22), and the section of the displacement sliding plate (51) is L-shaped, so that one end of the displacement sliding plate (51) is fixedly connected to the lateral sliding block (45) on the lateral support rail (42), and the other end is fixedly connected to the positive sliding block (46) on the positive support rail (43).

5. A portal friction welding apparatus according to claim 4, wherein One end of the displacement sliding plate (51) connected with the positive support rail (43) is equipped with sliding plate pressing plate (52), the part of the crossbeam (22) corresponding to the sliding plate pressing plate (52) is equipped with anti-off long strip (23), one end of the sliding plate pressing plate (52) is fixedly connected to the displacement sliding plate (51), the other end is abutted to the anti-off long strip (23) and can slide along the anti-off long strip (23).

6. A portal friction welding apparatus according to claim 1 wherein, The welding device (60) is provided with a head supporting plate (61), the third displacement device (50) is further provided with a third guide rail (53), a third sliding block (54), a third screw rod (55) and a third motor (56), the third guide rail (53) and the third motor (56) are respectively installed on the displacement sliding plate (51), one side of the third sliding block (54) is matched with the third guide rail (53) to form a sliding connection, and the other side is fixedly connected to the head supporting plate (61); the third screw rod (55) is rotationally connected to the displacement sliding plate (51) and is in driving connection with the third motor (56), and the screw nut of the third screw rod (55) is fixedly connected to the head supporting plate (61).

7. A portal friction welding apparatus according to claim 6, wherein The welding device (60) is further provided with a main shaft motor (62), a coupling (63) and a friction main shaft (64), the main shaft motor (62) is installed on the head supporting plate (61), one end of the coupling (63) is fixedly connected to the output end of the main shaft motor (62), and the other end is fixedly connected to the friction main shaft (64).

8. A portal friction welding apparatus according to claim 7, wherein The welding device (60) is further provided with a rotary assembly (70), the rotary assembly (70) is provided with a supporting inner ring (71), an outer ring gear (72), an outer ring turntable (73), a rotary motor (74) and a rotary gear (75), the supporting inner ring (71) and the rotary motor (74) are respectively fixedly connected to the head supporting plate (61), the rotary gear (75) is fixedly connected to the output end of the rotary motor (74), one end of the outer ring turntable (73) is fixedly connected to the outer ring gear (72), and the other end is fixedly connected to the main shaft mounting seat of the friction main shaft (64), the main shaft mounting seat is in rotational connection with the friction main shaft (64); the outer ring gear (72) is rotationally connected to the supporting inner ring (71) and is in meshing connection with the rotary gear (75).

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