High-strength aluminum alloy powder core wire friction stir additive manufacturing device

Abstract

The application relates to the field of friction stir additive manufacturing technology, in particular to a high-strength aluminum alloy powder core wire friction stir additive manufacturing device, which comprises a rack, a friction head is arranged on the rack, the friction head is used for feeding and rotating the powder core wire, a limiting device is arranged on the friction head, an inclined surface part is arranged in the limiting device, and the inclined surface part is used for guiding the plastic flowing metal material; an adapting device is arranged on the friction head, the adapting device is used for rotating the inclined surface part; an adjusting device is arranged on the friction head, a top spring is arranged in the adjusting device, and the top spring is used for pushing out the inclined surface part to the direction of the powder core wire. The application aims to reduce the transverse size of the flash generated in the friction stir additive manufacturing process, so as to improve the machining efficiency of the friction stir additive manufacturing process.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of friction stir additive manufacturing technology, in particular to a high-strength aluminum alloy powder core wire friction stir additive manufacturing device. BACKGROUND

[0002] Friction stir additive manufacturing is an innovative metal solid-phase additive manufacturing technology developed based on the principle of friction welding in recent years. The overall process of producing a workpiece is roughly as follows: through the principle of friction extrusion plastic deformation processing, metal is deposited layer by layer to obtain a blank, and then the blank is machined and surface treated to obtain a finished product. In this additive manufacturing, the metal material does not undergo melting and solidification, overcoming defects such as porosity, incomplete fusion and hot cracks that occur in fusion welding additive processes. At the same time, the additive deposition layer has forging organizational characteristics and excellent mechanical properties, so it has great application potential in high-performance lightweight alloy structure manufacturing represented by high-strength aluminum alloy.

[0003] The existing friction stir additive manufacturing equipment has a form as shown in the technical document with the patent number CN114951958B and the patent name of high-strength aluminum alloy powder core wire friction stir additive manufacturing system and method. In the process of additive manufacturing, a part of the metal material will be deposited in the target area to form a firm metal organizational structure when the powder core wire as raw material softens and flows plastically, and a part of the metal material will flow out of the target area to form a flash that does not meet the requirements of material performance. This part of the flash needs to be removed in the subsequent process to obtain the final finished product.

[0004] The current friction stir additive equipment lacks restriction on the generation of flash in the production process, resulting in a large transverse size of the flash in the blank obtained by additive manufacturing. Therefore, it also leads to the need to process a large depth in the subsequent process of cutting the flash, thereby forcing the number of tool paths to be increased, reducing the production efficiency.

[0005] Therefore, a high-strength aluminum alloy powder core wire friction stir additive manufacturing device is proposed. SUMMARY

[0006] The purpose of the present application is to provide a high-strength aluminum alloy powder core wire friction stir additive manufacturing device that reduces the transverse size of the flash generated in the process of friction stir additive manufacturing, thereby improving the processing efficiency of friction stir additive manufacturing processing.

[0007] To achieve the above purpose, the present application provides the following technical solutions:

[0008] The application discloses a high-strength aluminum alloy powder core wire friction stir additive manufacturing device, which comprises a rack, a friction head arranged on the rack, the friction head being used for feeding and rotating the powder core wire, a limiting device arranged on the friction head, a bevel part arranged in the limiting device and used for guiding the plastic flowing metal material, an adapting device arranged on the friction head and used for rotating the bevel part, and an adjusting device arranged on the friction head and comprising a top spring arranged in the adjusting device and used for pushing the bevel part to the powder core wire direction. The limiting device comprises a mounting frame arranged on the friction head, the mounting frame being annular and sleeved on the friction head, two limiting plates symmetrically arranged on the mounting frame, and the bevel part arranged on one side of the limiting plate close to the powder core wire.

[0009] It should be noted that the working process of the friction stir additive manufacturing has been disclosed in the prior art documents, and thus, the prior art part will not be explained and described unnecessarily in the following content.

[0010] Based on the scheme, when the powder core wire is deposited by extrusion and friction in the additive manufacturing plane, the bottom end of the friction head and the manufacturing plane have a gap to allow the excess material to flow out. At this time, for the materials flowing in the direction perpendicular to the advancing direction of the friction head, the bevel part on the limiting plate of the limiting device will block the horizontal flow of these materials, and change their flow direction from only along the horizontal direction to have the flow in the vertical direction. Thus, under the same flow path, the size of the flash formed by the materials after cooling in the horizontal direction will be reduced, thereby reducing the size of the flash of the manufactured blank in the horizontal direction. Therefore, when the flash of the blank is cut, the depth of the flash to be cut will be reduced, thereby the flash can be cut by fewer feed numbers under the condition that the cutting depth is unchanged, and the production efficiency is improved.

[0011] When the application changes the advancing direction in the machining process, the adapting device will rotate the limiting plate without interfering with the machined workpiece, so that the bevel part can always keep parallel to the advancing direction of the friction head. Therefore, for the materials flowing in the direction perpendicular to the advancing direction of the friction head, the bevel part can always block the horizontal flow of these materials, thereby facilitating to guarantee the limiting effect of the application on the flash size.

[0012] Moreover, since the mutual extrusion between the limiting plate and the flowing material will occur, when the mutual extrusion force between the two is too large, the material will be possible to be adhered on the limiting plate, so as to increase the geometric size of the limiting plate, and further increase the risk of the interference between the limiting plate and the processed workpiece, finally negatively affect the reliability and motion stability of the present application. By the action of the adjusting device, the inclined surface part can be pushed out by the top spring to the powder core wire material direction, so as to block the flowing material. Meanwhile, since the top spring is an elastic member, when the extrusion force of the flowing material based on the inclined surface part is too large, the top spring can be compressed to allow the displacement of the inclined surface part, so as to be beneficial to avoid the mutual adhesion between the inclined surface part and the flowing material due to the excessive mutual extrusion force, thereby prolonging the service life of the limiting plate and improving the reliability of the present application.

[0013] Moreover, the present application can also adjust the maximum extrusion force that the inclined surface part can withstand before displacement by adjusting the pre-tightening force of the top spring, so as to enable the present application to flexibly adjust the blocking ability of the inclined surface part to the material when facing different processing materials, thereby helping to maximize the reduction of the lateral size of the flash without adhesion to the processing material.

[0014] Preferably, the adapting device comprises a driving motor fixedly installed on the rack, a driving gear fixedly installed on the output end of the driving motor, a mounting frame rotatably installed on the friction head, an outer gear fixedly installed on the outer side of the mounting frame, the outer gear and the driving gear being in mesh with each other; two electric push rods are symmetrically fixedly installed on the top surface of the mounting frame, and two limiting plates are respectively arranged on the output ends of the two electric push rods; when the mounting frame rotates, the inclined angle of the inclined surface part and the metal flowing direction form an acute angle.

[0015] By this setting, when the present application changes the running direction during processing, it can be divided into the following two operating conditions:

[0016] Firstly, when the running direction of the friction head changes gently and by a small angle, for example, when producing a cover-shaped workpiece with a diameter of two meters and a thickness of two centimeters. At this time, even if the two limiting plates are rotated around the vertical shaft to ensure the parallelism between the inclined surface part and the running direction of the friction head, within a certain rotation angle, the limiting plate will not collide with the processed workpiece material. Therefore, the driving motor can be directly controlled to rotate by the control system, at this time, the driving gear will drive the mounting frame to rotate by meshing with the outer gear, so that the limiting plate can directly rotate around the vertical shaft, and for the material whose flowing direction is perpendicular to the running direction of the friction head, the inclined surface part can always block the horizontal flowing of these materials, thereby being beneficial to ensure the limiting effect of the present application on the size of the flash.

[0017] Second, when the travel direction of the friction head changes suddenly, for example, by 90°. The following will take a 90° turn as an example. At this time, if the rotation of the limiting plate is directly controlled by the driving motor, the limiting plate will collide with the workpiece material. Therefore, when the friction head travels to the turning part, according to the size of the limiting plate, first stop the travel of the friction head at a position where the limiting plate does not interfere with the processed workpiece; then start the electric push rod through the control system, and use the retraction of the electric push rod to lift the height of the limiting plate to a height that does not interfere with the workpiece material; then make the friction head continue to travel and pass through the turning part. During the process of lifting the limiting plate and the friction head passing through the turning part, the driving motor is started to rotate the limiting plate by 90° around the axis of the friction head. When the friction head has walked through the turning part, and the position reached by the friction head is just able to make the limiting plate not interfere with the workpiece after moving downward, the electric push rod is started again by the control system, and pushes the limiting plate back to the original height. At this time, the inclined part reblocks the flowing material.

[0018] As can be seen from the above, the present application can smoothly pass through the turning part on the workpiece through the adaptive device, so as to ensure that the present application can smoothly carry out continuous processing, which helps to ensure the working efficiency of the present application.

[0019] Preferably, the adjusting device comprises two bases fixedly installed at the output ends of the two electric push rods respectively, the base is provided with a mounting hole, the mounting hole is provided with a thread, the mounting hole is provided with an adjusting nut and a push plate, the adjusting nut at one end in the mounting hole abuts against the push plate; the push plate is fixedly provided with a top spring, the limiting plate is fixedly installed at the other end of the top spring; the limiting plate is provided with a matching part one, and the bottom end of the friction head is provided with a matching part two for abutting against the matching part one.

[0020] Through this setting, when the present application works, the inclined part can be pushed out in the direction of the powder core wire by the top spring, so as to block the flowing material. At the same time, since the top spring is an elastic member, when the extrusion force of the flowing material based on the inclined part is too large, the top spring can be compressed to allow the inclined part to displace, so as to facilitate avoiding the situation that the inclined part and the flowing material are adhered to each other due to excessive mutual extrusion.

[0021] And, the present application can also be adjusted by rotating the adjusting nut to change the length of the adjusting nut in the mounting hole, so as to adjust the position of the push plate in the mounting hole. At the same time, the position of the limiting plate is limited by the abutting of the first abutting portion and the second abutting portion, so as the position of the push plate moves, the length of the compression of the top spring will also change, so that the pushing force of the top spring on the limiting plate is changed, so that the maximum resistance of the limiting plate to the flowing material can be adjusted. That is, the pre-tightening force of the top spring can be adjusted to adjust the maximum extrusion force that the inclined portion can withstand before displacement, so that the present application can flexibly adjust the resistance of the inclined portion to the material when facing different processing materials, thereby helping to maximize the reduction of the lateral size of the flash without sticking to the processing material.

[0022] Wherein, the first abutting portion and the second abutting portion should both be inclined surfaces, so that when the moving base lifts the limiting plate upward, the electric push rod can force the limiting plate to move away from the powder core wire by the inclined surface of the first abutting portion and the second abutting portion. Thus, the components of the present application will not interfere with each other when moving, improving the motion stability of the present application. At the same time, since the limiting plate is lifted away from the powder core wire and the workpiece being processed at the same time, the risk of the limiting plate interfering with the workpiece being processed will be further reduced.

[0023] Preferably, the friction head bottom end is symmetrically fixed with two clamping blocks, and the clamping blocks are provided with abutting portions that abut with the upper part of the inclined portion.

[0024] For the limiting plate, the lower end has a downward overhanging portion. When the present application is not manufacturing workpieces, the side of the overhanging portion close to the axis direction of the friction head has no force to resist the elastic force of the top spring. At the same time, since the first abutting portion and the second abutting portion abut with inclined surfaces, the limiting plate will be subjected to two components of vertical downward and horizontal right through force analysis. These two components will also act on the top spring, causing the part of the top spring protruding out of the mounting hole to bend downward. At this time, for the part of the top spring protruding out of the mounting hole, when it is compressed back into the mounting hole, the spiral part of the top spring may abut against the opening of the mounting hole, that is, the top spring interferes with the base, so the base will block the top spring from being retracted into the mounting hole. Therefore, the displacement of the limiting plate in the horizontal direction will be reduced, and at this time, the inclined portion and the flowing material will be more likely to stick to each other due to excessive mutual extrusion force, thereby affecting the reliability and motion stability of the present application.

[0025] By setting the abutting portion and abutting the abutting portion with the inclined surface portion, when the workpiece is not manufactured, the inclined surface portion abuts against the abutting portion when the ejector spring abuts against the limiting plate. At this time, the limiting plate obtains the reaction force from the abutting portion on the inclined surface portion, and the horizontal and vertical components of the reaction force are left and upward respectively, so that the force causing the downward bending of the ejector spring is balanced. Thus, the downward bending of the ejector spring is avoided, so that the ejector spring can be smoothly retracted into the mounting hole when the workpiece is machined, and the reliability of the present application is improved.

[0026] On this basis, the clamping block has a guide portion, the inclination direction of the guide portion is the same as that of the inclined surface portion, and the included angle between the guide portion and the inclined surface portion is obtuse.

[0027] By this setting, since the included angle between the guide portion and the inclined surface portion is obtuse, when the plastically flowing material contacts the clamping block, it will be guided by the guide portion to the inclined surface portion and continue to flow downward along the inclined surface portion, so as to quickly leave the cooperation gap between the abutting portion and the inclined surface portion under the action of gravity and extrusion force.

[0028] Therefore, the flowing metal material cannot invade the cooperation gap between the abutting portion and the inclined surface portion, the cooperation gap between the first cooperation portion and the second cooperation portion, and the adhesion between the limiting plate and the friction head due to the invasion of the flowing metal material is prevented, the service life of the present application is improved, and the reliability of the present application during use is ensured.

[0029] Preferably, the axis of the ejector spring passes through the first cooperation portion and the second cooperation portion at the same time, the first cooperation portion and the second cooperation portion slide against each other when the output end of the electric push rod moves, a guide hole is formed in the base, a guide rod is fixedly installed on the limiting plate, and the guide rod is arranged in the guide hole.

[0030] When the electric push rod lifts the base and the limiting plate upward, the lower end overhanging part of the limiting plate close to one side of the axis direction of the friction head has no force to counteract the elastic force of the ejector spring. Since the first cooperation portion and the second cooperation portion abut against each other with an inclined surface, the limiting plate will be subjected to two components of vertical downward and horizontal rightward. The two components will also act on the ejector spring, causing the part of the ejector spring protruding out of the mounting hole to bend downward. At this time, for the part of the ejector spring protruding out of the mounting hole, when it is compressed into the mounting hole, the spiral part of the ejector spring will possibly abut against the hole of the mounting hole, that is, the ejector spring interferes with the base, so that the base will block the retraction of the ejector spring into the mounting hole.

[0031] Therefore, the displacement amount that the limiting plate can achieve in the horizontal direction will also be reduced, at this time, when the electric push rod lifts the limiting plate upward, the limiting plate will be more likely to interfere with the friction head due to the shortening of the displacement amount, thereby possibly causing the limiting plate to be unable to be lifted to a predetermined height, increasing the risk of interference between the limiting plate and the processed workpiece.

[0032] Therefore, the limiting plate cannot be displaced relative to the base in directions other than the axis direction of the guide rod, so that the top spring cannot be bent downward, which helps to avoid the problem of interference between the limiting plate and the friction head due to bending of the top spring, and improves the reliability of the present application.

[0033] In addition, by allowing the axis of the top spring to pass through the first and second fitting portions and keeping the first and second fitting portions in abutment, the horizontal component of the force exerted by the top spring on the limiting plate can be applied to abut the first fitting portion against the second fitting portion. Therefore, the problem of unnecessary bending moment on the guide rod due to the turning of the limiting plate under the action of the horizontal component of the force of the top spring is avoided, and the service life of the guide rod is prolonged.

[0034] Preferably, a cooling flow channel is arranged in the limiting plate and connected with an external water pump; the cooling flow channel is arranged at the upper part of the inclined surface portion, and the cooling flow channel and the clamping block are adjacent in the horizontal direction.

[0035] Through this arrangement, the cooling flow channel has a cooling effect on both the upper part of the inclined surface portion and the clamping block, so that the metal material passing through the upper part of the inclined surface portion and the guide portion can be cooled to reduce its flowability, thereby more effectively preventing the metal material from invading the gap between the fitting portion and the inclined surface portion, and improving the reliability of the present application.

[0036] Compared with the prior art, the present application has the following advantages:

[0037] 1. By arranging the limiting device, in the process of material deposition, for the material flowing in a direction perpendicular to the advancing direction of the friction head, the inclined surface portion on the limiting plate of the limiting device will block the horizontal flow of these materials and change their flow direction from the horizontal direction to the vertical direction. Thus, the size of the flash formed by these materials after cooling will be limited in the horizontal direction. Therefore, when cutting the flash of the blank, the depth of the flash to be removed will be reduced, so that fewer passes can be used to complete the removal of the flash, improving the production efficiency.

[0038] 2、By setting the adaptive device, the application will limit the plate in the case of no interference with the workpiece processing rotation, to make the inclined surface can always keep parallel with the friction head direction. Therefore, for the flow direction perpendicular to the friction head direction of the material, the inclined surface will be able to block the horizontal flow of these materials, and then help to ensure the effect of the application on the size of the fin limit. At the same time, the adaptive device allows the application to smoothly pass the turning part on the workpiece, so as to ensure that the application can be smoothly processed continuously, which helps to ensure the working efficiency of the application.

[0039] 3、By setting the adjusting device, the application can use the top spring to push the inclined surface to the powder core wire material direction, so as to block the flowing material. At the same time, since the top spring is a elastic member, when the flowing material is based on the extrusion force of the inclined surface is too large, the top spring can be compressed to allow the inclined surface to displace, so as to help to avoid the situation that the inclined surface and the flowing material are mutually adhered due to the excessive mutual extrusion force, thereby prolonging the service life of the limiting plate and improving the reliability of the application. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a schematic diagram of the overall structure of the application;

[0041] Figure 2 is Figure 1 a schematic diagram of the structure under the perspective view of the bottom;

[0042] Figure 3 is Figure 2 a local enlarged schematic of part A in the application;

[0043] Figure 4 is Figure 1 a left view cut schematic of the application;

[0044] Figure 5 is Figure 1 a front view cut schematic of the application;

[0045] Figure 6 is Figure 5 a local enlarged schematic of part B in the application;

[0046] Figure 7 is Figure 5 a local enlarged schematic of part C in the application;

[0047] Figure 8 is Figure 1 a cut schematic of the base under the perspective view of the top of the application.

[0048] In the figure: 1, rack; 2, mounting frame; 3, wire material; 4, base; 5, driving motor; 11, friction head; 12, clamping block; 21, outer gear; 22, electric push rod; 41, adjusting nut; 42, limiting plate; 43, guide rod; 44, top spring; 45, push plate; 46, guide hole; 51, driving gear; 121, fitting part; 122, guide part; 421, inclined part; 422, fitting part one; 423, fitting part two; 424, cooling flow channel. DETAILED DESCRIPTION

[0049] The following will be clearly explained by the specific embodiments of the present application with the aid of the drawings listed in the foregoing “description of drawings” section, so as to enable the reader to more completely and objectively understand the working principle and corresponding technical effects of the present application.

[0050] As Figures 1 to 8 shown, a specific embodiment of the present application is shown.

[0051] When the present application is installed, first, the rack 1 is fixed on the ground, the rack 1 is provided with the friction head 11, the friction head 11 is used to send out and rotate the powder core wire material, the friction head 11 is provided with a limiting device, the limiting device is provided with the inclined part 421, the inclined part 421 is used to guide the plastic flow of the metal material; the friction head 11 is provided with an adaptive device, the adaptive device is used to rotate the inclined part 421; the friction head 11 is provided with an adjusting device, the adjusting device is provided with the top spring 44, the top spring 44 is used to push out the inclined part 421 to the powder core wire material direction.

[0052] Among them, the limiting device includes the mounting frame 2 provided on the friction head 11, the mounting frame 2 is annular, and the mounting frame 2 is sleeved on the friction head 11, two limiting plates 42 are symmetrically provided on the mounting frame 2, and the inclined part 421 is provided on the side of the limiting plate 42 close to the powder core wire material.

[0053] And the adaptive device includes the driving motor 5 fixedly installed on the rack 1, the driving gear 51 is fixedly installed on the output end of the driving motor 5, the mounting frame 2 is rotatably installed on the friction head 11, the outer gear 21 is fixedly installed on the outer side of the mounting frame 2, and the outer gear 21 is meshed with the driving gear 51; two electric push rods 22 are symmetrically fixedly installed on the top surface of the mounting frame 2, and the two limiting plates 42 are respectively provided on the output ends of the two electric push rods 22; when the inclined part 421 rotates with the mounting frame 2, the inclination angle thereof forms an acute angle with the metal flow direction.

[0054] The adjusting device comprises two bases 4 respectively fixedly installed at the output ends of the two electric push rods 22, the base 4 is provided with a mounting hole, the mounting hole is provided with a thread, the mounting hole is provided with an adjusting nut 41 and a push plate 45, the adjusting nut 41 is located at one end of the mounting hole and abuts against the push plate 45; the push plate 45 is fixedly installed with a top spring 44, and a limiting plate 42 is fixedly installed at the other end of the top spring 44; the limiting plate 42 is provided with a matching part one 422, and the bottom end of the friction head 11 is provided with a matching part two 423 abutting against the matching part one 422.

[0055] In addition, the bottom end of the friction head 11 is symmetrically fixedly installed with two clamping blocks 12, the clamping block 12 is provided with a lamination part 121 abutting against the upper part of the inclined part 421. The axis of the top spring 44 passes through the matching part one 422 and the matching part two 423 at the same time; when the output end of the electric push rod 22 moves, the matching part one 422 and the matching part two 423 keep sliding abutment; the base 4 is provided with a guide hole 46, and the limiting plate 42 is fixedly installed with a guide rod 43 movably penetrating in the guide hole 46. The clamping block 12 is provided with a guide part 122, the inclination direction of the guide part 122 is the same as that of the inclined part 421, and the included angle between the guide part 122 and the inclined part 421 is obtuse. The limiting plate 42 is provided with a cooling flow channel 424 connected with an external water pump; the cooling flow channel 424 is arranged at the upper part of the inclined part 421, and the cooling flow channel 424 is adjacent to the clamping block 12 in the horizontal direction.

[0056] When the application works, the bottom end of the friction head 11 and the manufacturing plane will have a gap to allow excess material to flow out during the material deposition process of the powder core wire in the additive manufacturing plane by extrusion and friction. At this time, for the materials whose flow direction is perpendicular to the advancing direction of the friction head 11, the inclined part 421 on the limiting plate 42 of the limiting device will block the horizontal flow of these materials and change their flow direction from the horizontal direction to the vertical direction. Therefore, the size of the flash formed by these materials after cooling in the horizontal direction will be limited, thereby reducing the size of the flash of the manufactured blank in the horizontal direction as a whole. Therefore, when the flash of the blank is machined, the depth of the flash to be removed will be reduced, thereby completing the removal of the flash with fewer feed passes under the condition that the cutting depth remains unchanged, thereby improving the production efficiency.

[0057] When the application changes the advancing direction during the machining process, the adapting device will rotate the limiting plate 42 without interfering with the machined workpiece, so that the inclined part 421 can always keep parallel to the advancing direction of the friction head 11. Therefore, for the materials whose flow direction is perpendicular to the advancing direction of the friction head 11, the inclined part 421 will always block the horizontal flow of these materials, thereby facilitating the limitation effect of the application on the size of the flash.

[0058] Specifically, when the present application changes the running direction during the processing, the adapting device can be divided into the following two operating conditions:

[0059] First, when the running direction of the friction head 11 changes gently and by a small angle, for example, when processing a cover-shaped workpiece with a diameter of two meters and a thickness of two centimeters. At this time, even if the two limiting plates 42 are rotated around the vertical axis in order to ensure that the inclined surface 421 is parallel to the running direction of the friction head 11, within a certain rotation angle, the limiting plate 42 will not collide with the processed workpiece material. Therefore, the driving motor 5 can be directly controlled by the control system to generate rotation, at which time the driving gear 51 will drive the mounting frame 2 to rotate through the engagement with the external gear 21, so that the limiting plate 42 will be able to directly rotate around the vertical axis, and for the material flowing in a direction perpendicular to the running direction of the friction head 11, the inclined surface 421 will be able to always block the horizontal flow of these materials, thereby facilitating the limitation effect of the present application on the flash size.

[0060] Second, when the running direction of the friction head 11 changes abruptly, for example, by 90°. The following will take a 90° turn as an example. At this time, if the limiting plate 42 is directly controlled to rotate by the driving motor 5, the limiting plate 42 will collide with the workpiece material. Therefore, when the friction head 11 runs to the turning portion, according to the size of the limiting plate 42, the friction head 11 is first paused at a position where the limiting plate 42 does not interfere with the processed workpiece; then the control system starts the electric push rod 22, and the height of the limiting plate 42 is first lifted to a height that does not interfere with the workpiece material by the retraction of the electric push rod 22; then the friction head 11 continues to run and passes through the turning portion. During the process of lifting the limiting plate 42 and the friction head 11 passing through the turning portion, the driving motor 5 is started to rotate the limiting plate 42 by 90° around the axis of the friction head 11. When the friction head 11 has passed through the turning portion, and the position reached by the friction head 11 is just able to make the limiting plate 42 not interfere with the workpiece after moving downward, the electric push rod 22 is again started by the control system, and the limiting plate 42 is pushed back to the original height. At this time, the inclined surface 421 reblocks the flowing material.

[0061] As can be seen from the above description, the present application can smoothly pass through the turning portion on the workpiece through the adapting device, thereby ensuring that the present application can smoothly process continuously, which helps to ensure the working efficiency of the present application.

[0062] In addition, the specific working mode of the adjusting device is that when the application is working, the top spring 44 can push the inclined surface part 421 to the direction of the powder core wire, thereby blocking the flowing material. At the same time, since the top spring 44 is an elastic member, when the extrusion force of the flowing material based on the inclined surface part 421 is too large, the top spring 44 can be compressed to allow the inclined surface part 421 to displace, thereby avoiding the situation that the inclined surface part 421 and the flowing material are adhered to each other due to excessive mutual extrusion.

[0063] In addition, the application can also adjust the position of the push plate 45 in the mounting hole by rotating the adjusting nut 41 to change the length of the adjusting nut 41 in the mounting hole. At the same time, the position of the limiting plate 42 is limited by the abutting of the first abutting part 422 and the second abutting part 423, so as the position of the push plate 45 moves, the length of the top spring 44 being compressed will also change, thereby changing the pushing force of the top spring 44 on the limiting plate 42, so that the maximum blocking force of the limiting plate 42 on the flowing material can be adjusted. That is to say, the pre-tightening force of the top spring 44 can be adjusted to adjust the maximum extrusion force that the inclined surface part 421 can withstand before displacement, so that the application can flexibly adjust the blocking ability of the inclined surface part 421 to the material when facing different processing materials, thereby helping to maximize the reduction of the lateral size of the flash without adhering to the processing material.

[0064] In addition, the first abutting part 422 and the second abutting part 423 should both be inclined surfaces, so that when the moving base 4 lifts the limiting plate 42 upward, the electric push rod 22 can force the limiting plate 42 to move away from the powder core wire direction by the inclined surface abutting of the first abutting part 422 and the second abutting part 423, overcoming the elastic force of the top spring 44. Thus, the components of the application will not interfere with each other when moving, improving the motion stability of the application. At the same time, since the limiting plate 42 is lifted away from the powder core wire and also away from the workpiece being processed, the risk of the limiting plate 42 interfering with the workpiece being processed will be further reduced.

[0065] It should be emphasized that based on the content described in the above text, although the beneficial effects possessed by the application have been elaborated in detail and the corresponding specific embodiments have been provided, a person of ordinary skill in the art can make routine substitutions, deformations, etc. without creative labor based on the given technical solutions to achieve the same technical effects under the condition of fully understanding the working principle of the application, however, such should not be considered as beyond the limited scope of the application. Specifically, the scope of the application is defined by the appended claims and their equivalents.

Claims

1. A high-strength aluminum alloy powder core wire friction stir additive manufacturing device, comprising a rack (1), a friction head (11) is arranged on the rack (1), and the friction head (11) is used for feeding and rotating the powder core wire, characterized in that, The limiting device is provided on the friction head (11), and a slope part (421) for guiding the plastic flow of the metal material is arranged in the limiting device; an adapting device for rotating the slope part (421) is arranged on the friction head (11); an adjusting device is arranged on the friction head (11), and a top spring (44) for pushing the slope part (421) to the direction of the powder core wire is arranged in the adjusting device; The limiting device comprises a mounting frame (2) arranged on the friction head (11), the mounting frame (2) is annular, and the mounting frame (2) is sleeved on the friction head (11), two limiting plates (42) are symmetrically arranged on the mounting frame (2), and the slope part (421) is arranged on the side of the limiting plate (42) close to the powder core wire. The adapting device comprises a driving motor (5) fixedly installed on the rack (1), a driving gear (51) is fixedly installed on the output end of the driving motor (5), the mounting frame (2) is rotatably installed on the friction head (11), an outer gear (21) is fixedly installed on the outer side of the mounting frame (2), and the outer gear (21) is in mesh with the driving gear (51); two electric push rods (22) are symmetrically fixedly installed on the top surface of the mounting frame (2), and the two limiting plates (42) are arranged on the output ends of the two electric push rods (22) respectively; when the slope part (421) rotates with the mounting frame (2), the inclination angle of the slope part (421) forms an acute angle with the metal flow direction; The adjusting device comprises two bases (4) fixedly installed on the output ends of the two electric push rods (22) respectively, a mounting hole is formed in the base (4), a thread is formed in the mounting hole, an adjusting nut (41) and a push plate (45) are arranged in the mounting hole, and the adjusting nut (41) is located at one end in the mounting hole and abuts against the push plate (45); the top spring (44) is fixedly installed on the push plate (45), and the limiting plate (42) is fixedly installed on the other end of the top spring (44); the limiting plate (42) has a matching part one (422), and the friction head (11) is provided with a matching part two (423) for abutting against the matching part one (422).

2. The high-strength aluminum alloy powder core friction stir additive manufacturing device according to claim 1, characterized in that, The bottom end of the friction head (11) is symmetrically fixedly provided with two clamping blocks (12), and the clamping block (12) is provided with a fitting part (121) which abuts against the upper part of the slope part (421).

3. The high-strength aluminum alloy powder core friction stir additive manufacturing device according to claim 1, characterized in that, The axis of the top spring (44) passes through the matching part one (422) and the matching part two (423) at the same time; when the output end of the electric push rod (22) moves, the matching part one (422) and the matching part two (423) keep sliding abutment; the guide hole (46) is formed in the base (4), the guide rod (43) is fixedly installed on the limiting plate (42), and the guide rod (43) is arranged in the guide hole (46).

4. The high-strength aluminum alloy powder core friction stir additive manufacturing device according to claim 2, characterized in that, The card block (12) has a guide part (122), the inclination direction of the guide part (122) is same with the inclination direction of the inclined surface part (421), and the included angle between the guide part (122) and the inclined surface part (421) is obtuse.

5. The high-strength aluminum alloy powder core friction stir additive manufacturing device according to claim 4, characterized in that, The limiting plate (42) is internally provided with a cooling flow channel (424), which is connected with an external water pump; the cooling flow channel (424) is arranged at the upper part of the inclined surface part (421), and the cooling flow channel (424) is horizontally adjacent to the card block (12).

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