A dual swing head for friction stir welding

Abstract

The application discloses a double-swing head for friction stir welding, and relates to the technical field of welding.The double-swing head comprises a spindle box, an adapter seat, a sleeve, a spindle, a first driving source, a second driving source and a pipeline storage assembly.The adapter seat is arranged on the bottom of the spindle box in a rotary manner, and the sleeve is arranged on the adapter seat in a rotary swing state by virtue of two convex parts on the sleeve;the spindle is coaxially arranged on the sleeve in a rotary manner and can swing with the sleeve;the first driving source is arranged on the adapter seat and is used for driving the sleeve to swing; and the second driving source is arranged on the spindle box and is used for driving the adapter seat to rotate.The first driving source is arranged to automatically adjust the inclination angle of the mechanical spindle type double-swing head, and the pipeline storage assembly is introduced to uniformly and separately store and manage the pipelines related to the rotary motion of the spindle and the inclination angle adjustment swing, so that the risk of pipeline winding, abrasion and fatigue fracture is avoided from the overall structure, and the reliable automation of the mechanical spindle type double-swing head is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, in particular to a double-swinging head for friction stir welding. BACKGROUND

[0002] At present, the double-swinging head for friction stir welding can be mainly divided into two types of mechanical spindle type and electric spindle type. For example, the patent with the authorization announcement No. CN223043814U discloses a mechanical spindle head device suitable for a friction stir welding equipment, which belongs to the mechanical spindle type. The patent with the authorization announcement No. CN221158960U discloses a constant-pressure friction stir welding double-swinging head, which belongs to the electric spindle type.

[0003] Taking the mechanical spindle head device as an example, the rotation of the stirring needle is driven by the spindle transmission mechanism to realize welding, but the inclination angle of the stirring needle in the device is manually adjusted. In the above-mentioned electric spindle type double-swinging head, the constant-pressure spindle unit directly drives the stirring head to rotate to complete the welding, and the constant-pressure spindle unit does not need to be additionally configured with a pipeline rotation mechanism under the design characteristics. At the same time, the electric spindle type double-swinging head drives the constant-pressure spindle unit to rotate through the cooperation of the A-axis driving assembly and the A-axis transmission gear pair, so as to realize the automatic adjustment of the inclination angle of the stirring head.

[0004] Further, on the basis of the design of the mechanical spindle type double-swinging head, how to improve the spindle so that the inclination angle of the spindle can be automatically adjusted has become a pain point in the industry. SUMMARY

[0005] The purpose of the present application is to solve the problems in the prior art and to provide a double-swinging head for friction stir welding. The inclination angle of the head is automatically adjusted, and the pipeline storage assembly uniformly stores and manages the pipelines involved in the rotation of the spindle and the inclination swing of the head, so as to realize the reliable automation of the mechanical spindle type double-swinging head.

[0006] To solve the above problems, the present application provides the following technical scheme:

[0007] A double-swinging head for friction stir welding, comprising:

[0008] a spindle box;

[0009] an adapter seat, which is rotatably arranged at the bottom of the spindle box;

[0010] a sleeve, which is rotatably arranged on the adapter seat by two convex parts on the sleeve;

[0011] a spindle, which is coaxially rotatably arranged on the sleeve and can swing with the sleeve;

[0012] The first driving source is arranged on the adapter seat and used to drive the sleeve to swing;

[0013] The second driving source is arranged on the spindle box and used to drive the adapter seat to rotate;

[0014] The pipeline storage assembly is arranged in the spindle box and used to store the pipelines on the spindle and the first driving source.

[0015] As a further scheme of the present application, the pipeline storage assembly comprises a first drag chain and a second drag chain arranged in the spindle box, the first drag chain is used to install the pipelines on the spindle or the first driving source, and the second drag chain is used to install the pipelines on the first driving source or the spindle.

[0016] As a further scheme of the present application, the spindle box is internally provided with a partition plate, so that the internal cavity of the spindle box is sequentially divided into an upper region and a lower region from top to bottom, and the lower region is located between the spindle and the upper region, and the first drag chain and the second drag chain are coaxially arranged and respectively located in the upper region and the lower region.

[0017] As a further scheme of the present application, the pipeline storage assembly further comprises an external cylinder located in the lower region, and the external cylinder is located on the inner side of the second drag chain, the bottom end of the external cylinder is fixedly installed on the adapter seat, and the internal cavity of the external cylinder is used to guide the pipelines on the spindle or the first driving source to run from bottom to top and extend into the upper region, so that the pipelines are installed at the first drag chain in the upper region.

[0018] As a further scheme of the present application, the double-swing machine head further comprises a plurality of limiting tubes arranged below the external cylinder, and the limiting tubes are fixedly installed on the adapter seat by the flat portions at the bottom ends thereof, and the pipelines on the spindle and the first driving source can pass into the limiting tubes from the bottom ends and pass out from the top ends.

[0019] As a further scheme of the present application, the double-swing machine head further comprises a third driving source used to drive the spindle to rotate, and the third driving source comprises a spindle motor arranged on the top of the spindle box, the output shaft of the spindle motor is connected with the spindle through a universal joint, and the universal joint penetrates through the upper region and the lower region and is located on the inner side of the first drag chain and the second drag chain.

[0020] As a further scheme of the present application, the pipeline storage assembly further comprises an internal cylinder arranged in the lower region, the internal cylinder is sleeved on the outside of the universal joint and located on the inner side of the external cylinder, and a wire channel for guiding the pipelines is formed between the internal cylinder and the external cylinder.

[0021] As a further scheme of the present application, a spiral portion is arranged in the wire channel, so as to spirally guide the pipelines, and the pipelines are in the shape of a spiral disc in the wire channel.

[0022] As a further scheme of the present application: the transition cylinder is arranged coaxially with the outer cylinder, and the outer cylinder is provided with a supporting plate at the top end and the bottom end, the upper end of the first drag chain is arranged on the transition cylinder of the top inner wall of the spindle box, and the lower end is arranged on the supporting plate at the upper position; the upper end of the second drag chain is arranged on the bottom of the partition plate, and the lower end is arranged on the supporting plate at the lower position; and the transition cylinder and / or the supporting plate are provided with through holes for the pipeline.

[0023] As a further scheme of the present application: the first driving source includes a support, a hydraulic brake and an encoder, the support is fixedly arranged on the adapter seat, a torque motor is arranged on the support, the output shaft of the torque motor is in transmission connection with a convex part of the sleeve, the hydraulic brake is arranged on the adapter seat and acts on the convex part of the sleeve to generate a braking action, and the fixed end of the encoder is arranged on the adapter seat and the rotating end is arranged on the sleeve.

[0024] As a further scheme of the present application: the second driving source includes a driving motor fixedly arranged on the spindle box, and the output shaft of the driving motor is in transmission connection with the adapter seat through a speed reducer and a gear box.

[0025] Compared with the prior art, the present application has the following advantages:

[0026] 1. Based on the idea of a technical person to set the inclination angle of a mechanical spindle type double swing head to automatic adjustment, but considering that the mechanical spindle type double swing head is equipped with a large number of air pipes, cables and other cables, which need to be stored through a set of pipeline rotating mechanism. After realizing the automatic adjustment of the inclination angle, more cables need to be arranged for the newly added driving motor, transmission mechanism and other components, and these newly added cables also need to move with the mechanical spindle, which increases the complexity of pipeline layout. How to design an integrated pipeline management system that can adapt to the rotation of the spindle, the inclination angle swing of the swing head, the three movements of the spindle rotation and the swing head rotation, and avoid cable entanglement, wear and fatigue fracture is a design pain point in the industry.

[0027] Therefore, the present application realizes the automatic adjustment of the inclination angle of the mechanical spindle type double swing head through the arrangement of the first driving source, and realizes the unified and partitioned storage and management of all pipelines involved in the rotation of the spindle and the inclination angle swing of the swing head through the introduction of the pipeline storage assembly, which avoids the risks of pipeline entanglement, wear and fatigue fracture from the overall architecture, and realizes the reliable automation of the mechanical spindle type double swing head.

[0028] 2. By adopting two independent drag chains for function management, the air pipes / cables of the spindle and the pipelines of the inclination angle swing driving source are physically isolated into two drag chains, which avoids their mutual entanglement and friction, simplifies the complexity of pipeline layout, and makes the system still orderly after increasing the automatic function, which is convenient for installation and maintenance.

[0029] 3. By setting a partition in the spindle box, two independent spaces, upper and lower spaces, are created, and two drag chains are coaxially arranged, which greatly optimizes and utilizes the limited space in the spindle box. The two drag chains are placed in different spaces, which ensures that they will not interfere with each other during movement.

[0030] 4. The external cylinder serves as a fixed rigid protection channel, providing a safe and vertical channel for the pipeline from the bottom adapter, allowing it to pass through the complex motion area and reach the drag chain in the upper space. On the one hand, it isolates the motion interference between the pipeline and the second drag chain, and on the other hand, it prevents fatigue damage caused by disordered swinging and repeated bending at the motion interface.

[0031] 5. By setting the limiting tube, the pipeline smoothly transitions from the moving adapter to the spindle box, avoiding fatigue damage caused by excessive bending at the complex motion interface. Multiple sets of limiting tubes can be used to transition and arrange different types of pipelines and lines on the spindle and first drive source, ensuring smooth, orderly, and reliable transition from moving parts to static channels.

[0032] 6. By setting an internal cylinder inside the external cylinder, an annular wiring channel is formed with the external cylinder, which utilizes the idle space around the universal joint to provide a dedicated, double-protected safe corridor for the pipeline, ensuring that the pipeline passing through the lower space is completely isolated from the second drag chain and the high-speed rotating universal joint, further eliminating the risk of contact and friction between moving parts and the pipeline.

[0033] 7. By setting a spiral part to guide the pipeline to arrange in a spiral disc shape, the spiral shape gives the pipeline more stretching allowance and freedom, which can effectively absorb and compensate the length change required by the cable in complex motion, greatly reducing the internal stress and fatigue of the wire.

[0034] 8. By setting transition cylinders and support plates, stable and reliable fixing points are provided for the ends of the two drag chains, ensuring smooth and stable bending of the drag chains during movement. The through holes on all transition parts ensure that the pipeline can smoothly pass through different functional areas, realizing seamless connection from dynamic storage to static protection.

[0035] 9. The first driving source integrates a torque motor, a hydraulic brake and an encoder, wherein the torque motor provides stable large torque to drive the swing; the hydraulic brake ensures accurate angle locking at shutdown, ensuring safety; the encoder realizes high-precision position feedback and closed-loop control. The above three constitute a powerful, accurate and safe and reliable automated swing driving unit, meeting the driving needs of the mechanical spindle type double swing head for automatic adjustment of the inclination angle. BRIEF DESCRIPTION OF DRAWINGS

[0036] The application will be further described below with reference to the drawings.

[0037] Figure 1 is a schematic view of the three-dimensional structure of the application Figure 1 ;

[0038] Figure 2 is a schematic view of the three-dimensional structure of the application Figure 2 ;

[0039] Figure 3 is a schematic view of the three-dimensional structure of the application without the spindle box Figure 1 ;

[0040] Figure 4 is a schematic view of the three-dimensional structure of the application without the spindle box Figure 2 ;

[0041] Figure 5 is a schematic view of the partial structure in Figure 4 ;

[0042] Figure 6 is a schematic view of the three-dimensional structure of the limiting tube in the application

[0043] Figure 7 is a schematic view of the three-dimensional structure of the external cylinder and the drag chain in the application

[0044] Figure 8 is a schematic view of the three-dimensional structure of the sleeve and the spindle in the application

[0045] Figure 9 is a schematic view of the three-dimensional structure of the external cylinder and the drag chain in the application

[0046] Figure 10 is a schematic view of the sectional structure along A-A in Figure 9 ;

[0047] Figure 11 is a schematic view of the three-dimensional structure of the external cylinder in the application

[0048] Figure 12 is a schematic view of the sectional structure along B-B in Figure 11 ;

[0049] Figure 13is a schematic diagram of the front view structure of the external cylinder of one type of the present application;

[0050] Figure 14 is Figure 13 is a schematic diagram of the cross-sectional structure along the direction C-C in the above-mentioned external cylinder;

[0051] Figure 15 is a schematic diagram of the front view structure of another type of the external cylinder of the present application;

[0052] Figure 16 is a schematic diagram of the cross-sectional structure along the direction D-D of the present application.

[0053] in the figure:

[0054] 1, main shaft box; 101, partition; 102, upper area; 103, lower area; 2, adapter seat; 3, sleeve; 301, convex part; 4, main shaft; 5, first driving source; 6, second driving source; 601, driving motor; 602, speed reducer; 603, gear box; 7, first drag chain; 8, second drag chain; 9, external cylinder; 10, limiting tube; 1011, flat part; 11, main shaft motor; 12, universal joint; 13, internal cylinder; 14, spiral part; 15, support; 16, hydraulic brake; 17, torque motor; 18, transition cylinder; 19, support plate; 20, wiring channel; 21, gas-liquid booster cylinder; 22, observation hole; a, pipeline. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0056] As Figures 1-14 shown, a double-swing head for friction stir welding comprises the following basic structures:

[0057] (1) The main shaft box 1 and the sleeve 3, the main shaft box 1 is rotatably provided at the bottom with the adapter seat 2, the adapter seat 2 has two parallel layout lugs, the sleeve 3 has two convex parts 301, the two convex parts 301 are respectively inserted and installed on the two lugs, and are arranged in a rotary swing state on the adapter seat 2, the rotary swing axis direction is the axial direction of the convex part 301; the sleeve 3 is coaxially provided with the main shaft (i.e. a conventional mechanical main shaft) 4, the top of the main shaft 4 can be driven by a third driving source provided at the top of the main shaft box 1, and the bottom can be installed with a tool holder and a stir pin, during use, the third driving source can drive the main shaft 4 on the sleeve 3 to perform a rotary motion, thereby realizing high-speed rotation of the tool holder and the stir pin, and completing the corresponding friction stir welding work.

[0058] (2) A second driving source 6 is arranged on the spindle box 1, and the second driving source 6 is used to drive the adapter 2 to rotate by a certain angle. Normally, the sleeve 3 is first rotated to a specified inclination angle position, and then locked, and then the third driving source is used to drive the spindle 4 to rotate at high speed, so as to drive the stirring needle to rotate at high speed, and the spindle box 1 drives the stirring needle to penetrate to the position to be welded of the workpiece and walks along the weld path, that is, the welding is completed; if the weld is not linear during welding or the stirring needle position needs to be adjusted before and after welding, etc., at this time, the second driving source 6 is used to drive the adapter 2 to rotate by a certain angle, so that the space position of the stirring needle in the corresponding inclination angle state is adjusted. Taking the non-linear (curved) weld as an example, when the stirring needle works to the weld corner, the adapter 2 can be driven to rotate by a certain angle, until the stirring needle is adjusted to another corresponding position to be welded.

[0059] In summary, on the one hand, the inclination angle of the stirring needle is adjusted by adjusting the rotation swing position of the sleeve 3 on the adapter 2, and on the other hand, the space position of the stirring needle in the corresponding inclination angle is adjusted by driving the adapter 2 to rotate by a corresponding angle by the second driving source 6, that is, the double swing design of the present application is realized by combining the two adjustment methods.

[0060] As shown in Figures 1-2 , for the arrangement of the second driving source 6 described above, the second driving source 6 includes a driving motor 601 fixedly arranged on the spindle box 1, and the output shaft of the driving motor 601 is in transmission connection with the adapter 2 through a speed reducer 602 and a gear box 603. When working, the driving motor 601 is started, and the adapter 2 can be driven to rotate by the speed reducer 602 and the gear box 603. The design of the gear box 603 and the speed reducer 602 is a conventional technical means in the prior art, and this paper will not repeat it here in order to avoid complicated writing.

[0061] On the basis of the conventional design of the double swing head, the present application sets the rotation swing action of the sleeve 3 on the adapter 2 as automatic adjustment. For this purpose, the present application is provided with a first driving source 5 on the adapter 2, and the execution end of the first driving source 5 is used to drive the sleeve 3 to reciprocate and rotate around the convex part 301 as the center, so as to realize automatic inclination angle adjustment of the stirring needle located on the sleeve 3. Compared with the conventional way of fixing the convex part 301 on the adapter 2 by expansion sleeve and manually adjusting the inclination angle, the automatic inclination angle adjustment design of the present application not only simplifies the adjustment steps, but also has high automatic adjustment precision.

[0062] As follows, a way for realizing automatic inclination angle adjustment of the stirring needle is proposed, as Figure 3As shown, the first driving source 5 is provided with a support 15 fixedly arranged on the adapter seat 2, a hydraulic brake 16 and an encoder. The support 15 is provided with a torque motor 17, and the output shaft of the torque motor 17 is in transmission connection with a convex part 301 of the sleeve 3. Specifically, one of the transmission connection modes can be that the output shaft of the torque motor 17 is fixedly provided with a first bevel gear, the convex part 301 of the sleeve 3 is provided with a second bevel gear, and the first bevel gear is in meshing transmission with the second bevel gear. The hydraulic brake 16 is arranged on the adapter seat 2 and acts on the convex part 301 of the sleeve 3 to generate a braking action thereon. The fixed end of the encoder is arranged on the adapter seat 2, and the rotating end is arranged on the sleeve 3. In operation, the torque motor 17 is used to drive the first bevel gear to rotate, thereby realizing the rotation of the convex part 301, that is, the sleeve 3 performs a rotary swinging action. When it is required to rotate the sleeve 3 and the stirring needle thereon to a certain angle, the angle is controlled in a closed loop through the encoder. If the angle is in place, the convex part 301 of the sleeve 3 is locked through the hydraulic brake 16, thereby realizing the angle retention at the corresponding inclination angle.

[0063] On the basis of the above-mentioned automatic design of the inclination angle, since the first driving source 5 is also arranged on the adapter seat 2 like the main shaft 4, when the adapter seat 2 is adjusted in rotation, the first driving source 5 and the main shaft 4 will follow. In the case that the original main shaft 4 is already provided with a storage mechanism, the application also needs to additionally provide a set of storage mechanisms for storing the pipeline a on the first driving source 5. For this purpose, the application proposes the design of a pipeline storage assembly for partitioning and storing the pipelines a on the main shaft 4 and the first driving source 5, so as to avoid the entanglement and interference of the two in the process of following the adapter seat 2.

[0064] As shown in Figures 3-4 Specifically, the pipeline storage assembly includes a first drag chain 7 and a second drag chain 8 arranged in the main shaft box 1. The first drag chain 7 can be used for wiring and installing the pipeline a on the main shaft 4, or for wiring and installing the pipeline a on the first driving source 5. Similarly, the second drag chain 8 can also be used for wiring and installing the pipeline a on the two components. When the first drag chain 7 is used for wiring and installing the pipeline a on the main shaft 4, the second drag chain 8 is used for wiring and installing the pipeline a on the first driving source 5. When the first drag chain 7 is used for wiring and installing the pipeline a on the first driving source 5, the second drag chain 8 is used for wiring and installing the pipeline a on the main shaft 4. The two do not interfere with each other, and each is used for installing the corresponding pipeline a to adapt to the rotary action of the adapter seat 2.

[0065] As shown in Figure 2As shown, in order to adapt to the space layout inside the spindle box 1 and the convergence of the multiple pipelines a, etc., the first drag chain 7 and the second drag chain 8 are coaxially arranged in the spindle box 1, the spindle box 1 is internally provided with a partition plate 101, the partition plate 101 sequentially divides the inner cavity of the spindle box 1 from top to bottom into an upper region 102 and a lower region 103, the first drag chain 7 and the second drag chain 8 are alternatively arranged in the upper region 102 or the lower region 103, and the other drag chain is correspondingly arranged in the lower region 103 or the upper region 102.

[0066] As shown in the drawings, Figures 1-3 , the first drag chain 7 is arranged in the upper region 102, the second drag chain 8 is arranged in the lower region 103, the pipeline a on the main shaft 4 is arranged on the first drag chain 7, and the pipeline a on the first driving source 5 is arranged on the second drag chain 8. As an example, the first drag chain 7 and the second drag chain 8 are arranged in a coaxial design from top to bottom. The pipeline a on the main shaft 4 needs to pass through the lower region 103 and be arranged on the first drag chain 7 arranged in the upper region 102, and the pipeline a on the first driving source 5 can directly enter the lower region 103 and be arranged on the second drag chain 8.

[0067] As shown in the drawings, Figures 4-5 , for this purpose, the lower region 103 is provided with an external cylinder 9, the external cylinder 9 is located on the inner side of the second drag chain 8 (this inner side can be regarded as the inner cavity of the middle position of the whole track circle formed by the rotation of the second drag chain 8), the bottom end of the external cylinder 9 is fixedly arranged on the adapter 2, the pipeline a on the main shaft 4 is arranged in the inner cavity of the external cylinder 9 from bottom to top and extends to the upper region 102, and is finally arranged on the first drag chain 7. The external cylinder 9 is used to provide a protection channel for the pipeline a on the main shaft 4, so as to isolate it from the second drag chain 8 and prevent it from interfering with or winding on the second drag chain 8 in the lower region 103. Preferably, a plurality of observation holes 22 are formed in the external cylinder 9.

[0068] As shown in the drawings, Figures 3-4 and Figures 9-10 , in order to realize the corresponding position arrangement of the first drag chain 7 and the second drag chain 8 in the spindle box 1, a transition cylinder 18 is arranged on the top inner wall of the spindle box 1 and the bottom of the external cylinder 9, and the transition cylinder 18 is coaxially arranged with the external cylinder 9. The top end and the bottom end of the external cylinder 9 are both provided with a supporting plate 19, the upper end of the first drag chain 7 is arranged on the transition cylinder 18 of the top inner wall of the spindle box 1, and the lower end is arranged on the supporting plate 19 located at the upper position; the upper end of the second drag chain 8 is arranged on the bottom of the partition plate 101, and the lower end is arranged on the supporting plate 19 located at the lower position.

[0069] Further, the third driving source generally includes a main shaft motor 11 arranged on the top of the spindle box 1, and the output shaft of the main shaft motor 11 is in transmission connection with the main shaft 4 through a universal joint 12, Figure 1 and Figure 2As shown in the figure, the universal joint 12 is located in the main shaft box 1, and the universal joint 12 penetrates the upper region 102 and the lower region 103, and the two ends are located at the top end and the bottom end of the main shaft box 1 respectively. At the same time, the universal joint 12 is located at the inner side of the first drag chain 7 and the second drag chain 8, and the outer cylinder 9 is sleeved outside the universal joint 12 through the inner cavity.

[0070] In this third driving source design, in order to avoid the pipeline a on the main shaft 4 from interfering with the universal joint 12 when passing through the inner cavity of the outer cylinder 9, the application further adds an inner cylinder 13, which is located in the lower region 103, and the inner cylinder 13 is sleeved outside the universal joint 12 and located inside the outer cylinder 9. In this layout design, the inner cylinder 13 and the outer cylinder 9 form a wiring channel 20 for the pipeline a to run on. When the pipeline a on the main shaft 4 runs on the wiring channel 20, the independent cavity design of the wiring channel 20 will isolate the pipeline a, and will not interfere with the second drag chain 8 and the universal joint 12.

[0071] In an embodiment, the universal joint 12 is a ball cage type universal joint, which can rotate at high speed at 0 degree, and rotate at low speed with an inclination angle; it can be used for friction stir welding of curved surfaces at low speed, and can be used for milling curved surfaces at high speed.

[0072] Generally, the pipeline a is arranged in a straight line in the wiring channel 20. In order to enable the pipeline a with a larger activity allowance to run in the wiring channel 20, a spiral part 14 is arranged in the wiring channel 20 to form a spiral guide for the pipeline a, so that the pipeline a is in a spiral disc shape in the wiring channel 20. Figures 15-16 Secondly, a guide ring is arranged at the bottom position and the top position of the outer cylinder 9, which is used for guiding and limiting the entry and exit of the pipeline a. The spiral part 14 can be arranged on the inner wall of the outer cylinder 9 or on the outer wall of the inner cylinder 13. The spiral structure gives the pipeline a a larger extension allowance, which can better absorb and compensate the length change required due to the change of path in the double swing motion, effectively reduces the stress inside the pipeline a, and prevents fatigue damage caused by repeated bending and pulling.

[0073] On the basis of the existence of the transition cylinder 18 and the supporting plate 19, the application further opens a through hole for the pipeline a to pass through on the transition cylinder 18 and / or the supporting plate 19. The wiring and installation of the pipeline a on the main shaft 4 and the first driving source 5 are as follows:

[0074] (1) When the main shaft 4 and the pipeline a on the first driving source 5 enter the lower area 103 from below the main shaft box 1, the pipeline a on the main shaft 4 first passes through the through hole on the transition cylinder 18 and / or the supporting plate 19 at the bottom of the outer cylinder 9, preliminarily limits the pipeline a through the through hole, and then is installed in the wiring channel 20, passes out from the through hole on the supporting plate 19 at the top of the outer cylinder 9 after reaching the top of the wiring channel 20, is installed from the lower end to the upper end of the first drag chain 7, and finally is led out to the through hole on the transition cylinder 18 at the inner wall position of the top of the main shaft box 1, is limited through the through hole at the position, and is led out to the outside of the main shaft box 1.

[0075] (2) When the main shaft 4 and the pipeline a on the first driving source 5 enter the lower area 103 from below the main shaft box 1, the pipeline a on the first driving source 5 first passes through the through hole on the transition cylinder 18 and / or the supporting plate 19 at the bottom of the outer cylinder 9, preliminarily limits the pipeline a through the through hole, and then is installed from the lower end to the upper end of the second drag chain 8, and finally is led out to the outside of the main shaft box 1 through the upper end of the second drag chain 8.

[0076] Since the adapter 2 exists as a mounting carrier of the main shaft 4 and the first driving source 5, in order to conveniently lead the pipeline a on the main shaft 4 and the first driving source 5 into the main shaft box 1, the present application is provided with a limiting pipe 10 below the transition cylinder 18 at the bottom of the outer cylinder 9, the bottom end of the limiting pipe 10 is provided with a flat part 1011, the flat part 1011 is installed on the adapter 2, preferably, the limiting pipe 10 is provided in multiple groups, and any two adjacent groups share one flat part 1011. In the presence of the multiple groups of limiting pipes 10, the pipeline a on the main shaft 4 and the first driving source 5 can be classified and installed from bottom to top in the multiple groups of limiting pipes 10, and is led out to the transition cylinder 18 at the bottom of the outer cylinder 9 for subsequent installation. The present application leads the pipeline a to smoothly transition from the moving adapter 2 to the main shaft box 1 through the limiting pipe 10, and avoids fatigue damage of the pipeline a due to excessive bending at the complex motion interface. The multiple groups of limiting pipes 10 can classify and transition different types of pipelines and lines on the main shaft 4 and the first driving source 5.

[0077] It should be noted that the pipeline a on the main shaft 4 includes an oil pipe, a gas pipe, and a proximity switch sensor line, and the pipeline a on the first driving source 5 includes a line of the torque motor 17, a pipeline and a line of the hydraulic brake 16, and a pipeline and a line of the rotary encoder.

[0078] Based on the above-mentioned connecting components corresponding to each pipeline and circuit, such as the gas-liquid intensifier 21, power supply, etc., the installation position can be adaptively selected according to the actual installation condition. For example, the gas-liquid intensifier 21 is installed at the outer wall position of the top of the spindle box 1. At this time, the oil pipe on the spindle 4 can be arranged to pass through the through hole of the transition cylinder 18 on the inner wall of the top of the spindle box 1 after passing through the first drag chain 7, and then connected with the gas-liquid intensifier 21 outside the spindle box 1.

[0079] The oil pipe of the hydraulic brake 16 is connected with another gas-liquid intensifier outside the spindle box 1 through the second drag chain 8, so as to provide power for the hydraulic brake 16.

[0080] The mechanical spindle type double swing head design of the present application can also facilitate the replacement of the third driving source (spindle motor) matched with different rotating speeds and loads to face different complex working conditions of the friction stir welding requirements.

[0081] The above describes one embodiment of the present application in detail, but the content described is only the preferred embodiment of the present application, and cannot be considered as limiting the implementation range of the present application. Any equivalent changes and improvements made according to the scope of the present application should still belong to the patent coverage range of the present application.

Claims

1. A dual swing tool for friction stir welding, characterized by, The utility model relates to a double swing machine head, comprising: a spindle box (1); an adapter seat (2) rotatably arranged at the bottom of the spindle box (1); a sleeve (3) rotatably arranged on the adapter seat (2) by two convex parts (301) on the sleeve (3); a spindle (4) coaxially rotatably arranged on the sleeve (3) and capable of swinging with the sleeve (3); a first driving source (5) arranged on the adapter seat (2) and used to drive the sleeve (3) to swing; a second driving source (6) arranged on the spindle box (1) and used to drive the adapter seat (2) to rotate; a pipeline storage assembly arranged in the spindle box (1) and used to store pipelines (a) on the spindle (4) and the first driving source (5) in a zoned manner; the pipeline storage assembly comprises a first drag chain (7) and a second drag chain (8) arranged in the spindle box (1), the first drag chain (7) is used to install the pipelines (a) on the spindle (4) or the first driving source (5), and the second drag chain (8) is used to install the pipelines (a) on the first driving source (5) or the spindle (4); the spindle box (1) is internally provided with a partition plate (101), so that the inner cavity of the spindle box (1) is sequentially divided into an upper zone (102) and a lower zone (103) from top to bottom, the lower zone (103) is located between the spindle (4) and the upper zone (102), and the first drag chain (7) and the second drag chain (8) are coaxially arranged and located in the upper zone (102) and the lower zone (103), respectively; the pipeline storage assembly further comprises an external cylinder (9) located in the lower zone (103), the external cylinder (9) is located on the inner side of the second drag chain (8), the bottom end of the external cylinder (9) is fixedly installed on the adapter seat (2), and the inner cavity of the external cylinder (9) is used to guide the pipelines (a) on the spindle (4) or the first driving source (5) to run from bottom to top and extend into the upper zone (102), so that the pipelines (a) are installed at the first drag chain (7) in the upper zone (102).

2. A dual swing head for friction stir welding as claimed in claim 1, wherein, The double swing machine head further comprises a plurality of limiting tubes (10) arranged below the external cylinder (9), the limiting tubes (10) are fixedly installed on the adapter seat (2) by flat parts (1011) at the bottom ends of the limiting tubes (10), and the pipelines (a) on the spindle (4) and the first driving source (5) can pass through the bottom ends of the limiting tubes (10) and pass out through the top ends.

3. A dual swing head for friction stir welding as defined in claim 1, wherein The double swing machine head further comprises a third driving source used to drive the spindle (4) to rotate, the third driving source comprises a spindle motor (11) arranged at the top of the spindle box (1), the output shaft of the spindle motor (11) is in transmission connection with the spindle (4) through a universal joint (12), the universal joint (12) penetrates the upper zone (102) and the lower zone (103), and is located on the inner side of the first drag chain (7) and the second drag chain (8).

4. A dual swing head for friction stir welding as claimed in claim 3, wherein, the pipeline storage assembly further comprises an internal cylinder (13) arranged in the lower zone (103), the internal cylinder (13) is arranged outside the universal joint (12) and on the inner side of the external cylinder (9), and a wiring channel (20) for the pipelines (a) to run is formed between the internal cylinder (13) and the external cylinder (9).

5. A dual swing head for friction stir welding as claimed in claim 4, wherein, The spiral part (14) is arranged in the wiring channel (20) to form spiral guide for the pipeline (a), so that the pipeline (a) is in the form of spiral disc in the wiring channel (20).

6. A dual swing head for friction stir welding as claimed in any one of claims 1 to 5, wherein, The transition cylinder (18) is arranged on the inner wall of the top of the main shaft box (1) and the bottom of the external cylinder (9), and the transition cylinder (18) is coaxially arranged with the external cylinder (9). The external cylinder (9) is provided with a supporting plate (19) at the top and the bottom. The upper end of the first drag chain (7) is arranged on the transition cylinder (18) of the inner wall of the top of the main shaft box (1), and the lower end is arranged on the supporting plate (19) located at the upper position. The upper end of the second drag chain (8) is arranged on the bottom of the partition plate (101), and the lower end is arranged on the supporting plate (19) located at the lower position. The transition cylinder (18) and / or the supporting plate (19) are provided with through holes for the pipeline (a).

7. A dual swing head for friction stir welding as claimed in any one of claims 1 to 5, wherein, The first driving source (5) comprises a support (15), a hydraulic brake (16) and an encoder. The support (15) is fixedly arranged on the adapter seat (2), and a torque motor (17) is arranged on the support (15). The output shaft of the torque motor (17) is in transmission connection with a convex part (301) of the sleeve (3). The hydraulic brake (16) is arranged on the adapter seat (2) and acts on a convex part (301) of the sleeve (3) to generate a braking action. The fixed end of the encoder is arranged on the adapter seat (2), and the rotating end is arranged on the sleeve (3).

8. A dual swing head for friction stir welding as claimed in any one of claims 1 to 5, wherein, The second driving source (6) comprises a driving motor (601) fixedly arranged on the main shaft box (1). The output shaft of the driving motor (601) is in transmission connection with the adapter seat (2) through a speed reducer (602) and a gear box (603).

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