Continuous feeding device for friction stir additive

Abstract

The invention discloses a continuous feeding device for friction stir additive materials, comprising: a feeding mechanism, the feeding mechanism comprises a chuck and a driving rod, the feeding mechanism is provided with a clutch member, the driving rod drives the chuck to move through the clutch member, and the chuck is used for clamping a bar material; the chuck comprises a mounting plate and a chuck body, the chuck body comprises a shell, a piston, a driving part and a clamping part, a hydraulic cavity is formed in the shell, the piston is slidably mounted in the hydraulic cavity and is suitable for driving the driving part to move, and the driving part is suitable for driving the clamping part to move; according to the feeding device, the lead screw is matched with the clutch piece, and at least the first feeding mechanism and the second feeding mechanism are arranged, so that the clutch piece of the first feeding mechanism and / or the second feeding mechanism is controlled to be tightly matched with or loosened from the driving rod when needed, and continuous feeding is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of additive manufacturing, and in particular to a continuous feeding device for friction stir additive manufacturing. Background Art

[0002] The common raw materials for stir friction deposition manufacturing are rods, wires, particles, etc. The stir friction deposition manufacturing technology based on rods has the advantages of high efficiency, strong performance and low cost. However, most of the relevant technologies are currently non-continuous rod feeding deposition manufacturing technologies. Continuous rod feeding stir friction deposition manufacturing is extremely urgent in the fields of large-scale high-strength structural parts, dissimilar metal deposition manufacturing, etc., and therefore it needs to be improved. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an object of the present invention is to provide a continuous feeding device for stir friction additive manufacturing, comprising:

[0005] A feeding mechanism, the feeding mechanism comprises a chuck and a driving rod, the feeding mechanism is provided with a clutch, the driving rod drives the chuck to move through the clutch, and the chuck is used to clamp the bar; the chuck comprises a mounting plate and a chuck body, the chuck body comprises a shell, a piston, a driving member and a clamping member, a medium cavity is provided in the shell, the piston is slidably mounted in the medium cavity and is suitable for driving the driving member to move, and the driving member is suitable for driving the clamping member to move;

[0006] The clamping member is slidably mounted on the housing along a first direction, and the movement direction of the driving member and the axial direction of the housing both intersect with the first direction;

[0007] The clutch is suitable for holding or releasing the driving rod, and the clamp is suitable for holding or releasing the rod. When the clutch holds the driving rod, the clamp clamps the rod, and when the clutch releases the driving rod, the clamp releases the rod.

[0008] The present application achieves continuous feeding by cooperating with the screw and the clutch, and setting at least a first feeding mechanism and a second feeding mechanism, so that the clutch of the first feeding mechanism and / or the second feeding mechanism can be controlled to engage or separate with the drive rod thread when necessary.

[0009] Optionally, there are multiple of the feeding mechanisms, and the multiple feeding mechanisms are arranged at intervals in the vertical direction. The driving rod has a threaded section. The clutch member has a first state in which it is in threaded engagement with the driving rod and a second state in which it is separated from the driving rod. When in the first state, the driving rod can drive the feeding seat of the feeding mechanism to move in the feeding direction. When in the second state, the clutch member is sleeved on the driving rod loosely;

[0010] The device further includes a driving assembly. When the clutch member is sleeved on the driving rod loosely and the clamping member does not clamp the bar stock, the driving assembly is used to drive the feeding seat of the feeding mechanism to move in a direction opposite to the feeding direction;

[0011] Among them, the multiple feeding mechanisms at least include a first feeding mechanism and a second feeding mechanism. When the feeding seat of the first feeding mechanism moves to the lower stroke position in the feeding direction, the driving assembly drives the feeding seat of the first feeding mechanism to move in a direction opposite to the feeding direction towards the upper stroke position, and / or when the feeding seat of the second feeding mechanism moves to the lower stroke position in the feeding direction, the driving assembly drives the feeding seat of the second feeding mechanism to move in a direction opposite to the feeding direction towards the upper stroke position. The upper stroke position and the lower stroke position are arranged at intervals in the feeding direction.

[0012] Optionally, the mounting plate is provided with a through hole for the bar to pass through. The housing is rotatably mounted on the mounting plate, and the axis of the housing coincides with the axis of the through hole. A through hole is formed in the housing and penetrates the housing along the axis of the housing, and the axis of the through hole coincides with the axis of the through hole; the piston includes a driving section extending radially outward; the driving member is slidably mounted in the housing along the axial direction, and the axis of the driving member is parallel to the axis of the housing along the radial direction of the housing. The driving member includes a first driving surface and a second driving surface provided at both ends of its axial direction. The first driving surface extends along the radial direction of the piston, faces the driving section, and is adapted to abut against the driving section. There are multiple driving members, and the multiple driving members are evenly arranged at intervals along the circumferential direction of the housing. The second driving surface extends gradually downward and obliquely from the inside to the outside in the radial direction; the clamping member includes a first end close to the axis of the housing and a second end away from the axis of the housing. The second end is adapted to fit with the second driving surface. The end surface of the first end extends along the axis direction of the housing, and the end surface of the first end of the clamping member is adapted to clamp the bar stock; there are multiple clamping members, and the multiple clamping members are arranged in one-to-one correspondence with the multiple driving members.

[0013] Optionally, it further includes a mounting seat. The mounting seat is fixedly connected to the mounting plate. The mounting seat is hollow, and the housing is rotatably mounted in the mounting seat.

[0014] Optionally, a hydraulic inlet and a hydraulic outlet are provided on the mounting base, the medium cavity is a hydraulic cavity, and the hydraulic inlet and the hydraulic outlet communicate with the hydraulic cavity.

[0015] Optionally, the housing includes a first housing and a second housing. At least part of the first housing is hollow, and one end of the first housing is open. The second housing closes the open end of the first housing to form the medium cavity, and the driving member and the clamping member are both mounted on the first housing.

[0016] Optionally, at least a part of the second housing facing away from the first housing extends into the through hole, and the second housing is rotatably mounted on the mounting plate.

[0017] Optionally, the first housing is axially spaced from the mounting plate. The second housing includes a mounting flange, at least a part of the second housing extends into the medium cavity, and the mounting flange abuts against the end of the first housing facing the mounting plate.

[0018] Optionally, the piston includes a main body section and a driving section. The axis of the main body section coincides with the axis of the driving section. The driving section extends radially outward along the main body section, and the driving section is adapted to abut against the first driving surface.

[0019] Optionally, the first housing is provided with a first limiting groove facing the medium cavity, and the second housing is provided with a second limiting groove facing the medium cavity. Axial ends of the main body section are respectively mounted in the first limiting groove and the second limiting groove.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0021] The above-mentioned and / or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments in conjunction with the drawings, where:

[0022] Figure 1 is a schematic structural diagram of a continuous feeding device for friction stir additive manufacturing according to an embodiment of the present invention;

[0023] Figure 2 is a schematic operation diagram of a continuous feeding device for friction stir additive manufacturing according to an embodiment of the present invention;

[0024] Figure 3 is a schematic operation diagram of a continuous feeding device for friction stir additive manufacturing according to another embodiment of the present invention;

[0025] Figure 4Initial state diagram of a continuous feeding device for friction stir additive manufacturing according to an embodiment of the present invention;

[0026] Figure 5 Schematic structural diagram of a chuck device in an embodiment of the present invention.

[0027] Reference numerals:

[0028] Bar 9; Chuck body 10; Outer shell 11; Material guiding member 12; Auxiliary pressing rod member 13;

[0029] Inner shell 12; Vertical channel 121; Inclined channel 122; Accommodating cavity 123; First inner shell hole 124; Second inner shell hole 125;

[0030] Inner shell top cover 13; Rod body through hole 131;

[0031] Clamping member 14; Driving member 15; Piston 16;

[0032] Mounting plate 20; Through hole 21; Bearing groove 22;

[0033] First bearing 30; Second bearing 40;

[0034] Feeding mechanism 300; First feeding mechanism 300a; Second feeding mechanism 300b;

[0035] Feeding seat 310; Feeding port 311; Driving rod 320; Clutch member 330;

[0036] Guide rail 340; Guide sliding seat 350; First driving mechanism 360; Lower stroke position detection element 370; Lower limit position detection element 380;

[0037] Machine base 400; Output end 410 of driving motor; Driving wheel 411; Transmission wheel 412. Detailed implementation manners

[0038] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0039] The core of friction stir deposition manufacturing based on bars lies in transporting the rotating additive bars to the surface of the substrate or the deposited layer. These additive bars undergo intense friction with the substrate or the deposited layer, generating frictional heat and plastic deformation heat, thereby plastically softening the additive bars. Under the forging pressure of the shoulder, the plasticized bars are combined with the substrate or the deposited layer to form a deposited layer. As the stirring head moves, new deposited layers are continuously added to the deposited layer, and finally a three-dimensional solid part is formed.

[0040] As Figure 1 shown, the friction stir additive manufacturing device generally includes a movable main shaft 10, the main shaft 10 is provided with a rotatable stirring head 11, the main shaft 10 drives the stirring head 11 and the additive rod 9 to rotate, and frictions on the surface of the substrate or the deposited layer, so as to realize deposition manufacturing.

[0041] According to the description of the background art, continuous rod feeding friction stir deposition manufacturing is extremely urgent in the fields of large high-strength structural parts, dissimilar metal deposition manufacturing, etc. Therefore, the present application proposes a continuous feeding device for friction stir additive manufacturing.

[0042] As Figure 1 shown, the friction stir additive manufacturing device generally includes a movable main shaft 10, the main shaft 10 is provided with a rotatable stirring head 11, the main shaft 10 drives the stirring head 11 and the additive rod 9 to rotate, and frictions on the surface of the substrate or the deposited layer, so as to realize deposition manufacturing.

[0043] As Figure 1 shown, the continuous feeding device includes a plurality of feeding mechanisms 300, the plurality of feeding mechanisms 300 are arranged at intervals in the vertical direction, the plurality of feeding mechanisms 300 each include a feeding seat 310 and a driving rod 320, the plurality of feeding seats 310 are each provided with a clutch member 330, the clutch member 330 has a first state of tightly fitting with the driving rod 320 and a second state of separating from the driving rod 320. When in the first state, that is, when the clutch member 330 tightly fits with the driving rod 320, the driving rod 320 can drive the feeding seat 310 to move in the feeding direction. When in the second state, that is, when the clutch member 330 is loosened and separated from the driving rod 320, the clutch member 330 is sleeved on the driving rod 320 loosely.

[0044] The plurality of feeding seats 310 are each further provided with a feeding port 311 and a clamping mechanism. The clamping mechanism is installed on the feeding seat 310 and is adapted to clamp the additive rod. The feeding ports 311 of the feeding seats 310 of the plurality of feeding mechanisms 300 are facing each other. The feeding port 311 can avoid the rod. The feeding ports 311 of the feeding seats 310 of the plurality of feeding mechanisms 300 are facing each other, so that the rod can move from one feeding seat 310 to another feeding seat 310 in the feeding direction. The clamping mechanism can have a state of clamping the rod and a state of loosening the rod.

[0045] The continuous feeding device of the present invention further includes a driving assembly. When the clutch member 330 is sleeved on the driving rod 320 loosely and the clamping mechanism does not clamp the rod, the driving assembly is used to drive the feeding seat 310 to move in the direction opposite to the feeding direction.

[0046] Among them, the plurality of feeding mechanisms 300 at least include a first feeding mechanism 300a and a second feeding mechanism 300b. As Figure 1As shown, in one of the embodiments, the second feeding mechanism 300b and the first feeding mechanism 300a are arranged at intervals along the feeding direction. In another embodiment, the second feeding mechanism 300b and the first feeding mechanism 300a are arranged at intervals along the direction opposite to the feeding direction. For the convenience of description, in the following embodiments without special instructions, the second feeding mechanism 300b and the first feeding mechanism 300a are arranged at intervals along the feeding direction, that is, the second feeding mechanism 300b is located above the first feeding mechanism 300a.

[0047] As Figures 1 to 4 shown, when the feeding device is working, when the feeding seat of the first feeding mechanism 300a moves to the lower stroke position along the feeding direction, the driving assembly drives the feeding seat of the first feeding mechanism 300a to move upward along the direction opposite to the feeding direction, or when the feeding seat of the second feeding mechanism 300b moves to the lower stroke position along the feeding direction, the driving assembly drives the feeding seat of the second feeding mechanism 300b to move upward along the direction opposite to the feeding direction, and the upper stroke position and the lower stroke position are arranged at intervals along the feeding direction.

[0048] Specifically, when the clutch member 330 of the first feeding mechanism 300a and its corresponding driving rod 320 are tightly clamped and matched, for example, after the clutch member 330 and the driving rod 320 are tightly clamped, a screw-nut fit is carried out to drive the driving rod 320 to rotate, which can make the feeding seat 310 of the first feeding mechanism 300a move along the feeding direction. For another example, the driving rod 320 can be driven by a cylinder. After the clutch member 330 and the driving rod 320 are tightly clamped, the driving rod 320 can make the feeding seat 310 of the first feeding mechanism 300a move along the feeding direction. During the process of the feeding seat 310 of the first feeding mechanism 300a moving along the feeding direction, when the clamping mechanism of the first feeding mechanism 300a clamps the bar stock, it can convey the bar stock to the stirring head 11 for feeding. When the feeding seat 310 of the first feeding mechanism 300a moves to the lower stroke position, it can convey the bar stock into the stirring head 11 for feeding. As Figure 2 shown, when the feeding seat 310 is in the lower stroke position, the clutch member 330 can be in a separated state from the driving rod 320. At this time, the clutch member 330 is sleeved on the driving rod 320 loosely, that is, even if the driving rod 320 continues to rotate or move, it will not drive the feeding seat 310 to move further along the feeding direction.

[0049] When the feeding seat 310 of the first feeding mechanism 300a moves to the lower stroke position, at this time, the feeding seat 310 of the second feeding mechanism 300b can be located at the upper stroke position, or between the lower stroke position and the upper stroke position, and the clutch member 330 of the second feeding mechanism 300b holds tightly and cooperates with the driving rod 320 of the second feeding mechanism 300b, and the clamping mechanism of the second feeding mechanism 300b clamps the bar stock. Then, by driving the driving rod 320 of the second feeding mechanism 300b to rotate, the feeding seat 310 of the second feeding mechanism 300b can be moved along the feeding direction.

[0050] After the feeding seat 310 of the first feeding mechanism 300a moves to the lower stroke position, the feeding seat 310 can be driven by the driving assembly to move to the upper stroke position. During the upward movement, the clamping mechanism of the first feeding mechanism 300a is in a state of loosening the bar stock. After moving to the upper stroke position, then control the clamping mechanism of the first feeding mechanism 300a to clamp the bar stock, and then jointly clamp the bar stock with the clamping mechanism of the second feeding mechanism 300b and move along the feeding direction to realize the feeding of the bar stock.

[0051] As Figure 3 shown, when the feeding seat 310 of the second feeding mechanism 300b moves to the lower stroke position, the clamping mechanism of the second feeding mechanism 300b can be controlled to loosen the bar stock, and then the feeding seat 310 of the second feeding mechanism 300b is driven by the driving assembly to move to the upper stroke position, and then control the clamping mechanism of the second feeding mechanism 300b to clamp the bar stock and jointly clamp the bar stock with the clamping mechanism of the first feeding mechanism 300a and move along the feeding direction to realize the feeding of the bar stock.

[0052] In this way, in the present application, the driving rod 320 is used to drive the feeding seat 310 to move towards the lower stroke position. When the feeding seat 310 moves to the lower stroke position, the clutch member 330 can be sleeved on the driving rod 320. Then, the feeding seat 310 is driven by the driving assembly to move towards the upper stroke position in the direction opposite to the feeding direction. When the feeding seat 310 moves to the upper stroke position, the clutch member 330 can hold tightly and cooperate with the driving rod 320, and then the driving rod 320 drives the feeding seat 310 to move along the feeding direction. Further, the first feeding mechanism 300a and the second feeding mechanism 300b are also provided. In this way, when needed, control the clutch member 330 of the first feeding mechanism 300a and / or the clutch member 330 of the second feeding mechanism 300b to hold tightly and cooperate with the driving rod 320, and when needed, control the clutch member 330 of the first feeding mechanism 300a or the clutch member 330 of the second feeding mechanism 300b to separate from the driving rod 320, and so on in a cycle to realize continuous feeding.

[0053] In one embodiment, as Figure 1As shown, the continuous feeding device further includes a material guiding member 12 and an auxiliary pressing rod member 13. The material guiding member 12 has a material guiding channel, and the material guiding channel is opposite to the feeding port of the feeding base 310. During the above continuous rod feeding process, when a rod shortage signal appears, the rod material 9 can fall into the material guiding channel, and then the just-fallen rod material 9 is pressed by the auxiliary pressing rod member 13, so that there is no gap between the upper and lower rod materials 9, thus realizing the continuous rod feeding function.

[0054] In one embodiment, the driving rod 320 has a threaded section. For example, the driving rod 320 can be a lead screw. In the first state, the clutch member 330 is tightly engaged with the threaded section of the driving rod 320 in a threaded fit. In the second state, the clutch member 330 is disengaged from the threaded section of the driving rod 320, and the clutch member 330 is sleeved on the threaded section of the driving rod 320. Thus, by adopting a transmission method such as a lead screw, the feeding is made stable.

[0055] In one embodiment, one motor can be used to drive the rotation of the driving rod 320 of the first feeding mechanism 300a, and another motor can be used to drive the rotation of the driving rod 320 of the second feeding mechanism 300b, that is, two motors are used to drive the first feeding mechanism 300a and the second feeding mechanism 300b to work respectively.

[0056] In another embodiment, as Figure 1 shown, the driving rod 320 of the first feeding mechanism 300a and the driving rod 320 of the second feeding mechanism 300b are coaxially connected and configured as a driving rod assembly. The driving rod assembly is power-coupled to the driving motor. Among them, the driving rod assembly can be an integral structure or two driving rods 320 are welded together, and no specific limitation is made. Thus, one motor can be set to drive the feeding bases 310 of both the first feeding mechanism 300a and the second feeding mechanism 300b to move simultaneously. Thus, on the basis of realizing continuous feeding, its structure is simple and reliable, and the conveying stability can also be guaranteed. And since there is only one power source, the deposition thrust can be kept stable within a controllable range all the time, and situations such as sudden thrust change will not occur.

[0057] In one embodiment, as Figure 1 shown, the output end 410 of the driving motor is located on the side of the second feeding mechanism 300b away from the first feeding mechanism 300a, and there are multiple driving rod assemblies. All the multiple driving rod assemblies are power-coupled to the driving motor. Thus, by setting one driving motor, multiple driving rod assemblies can be driven to rotate simultaneously. Thus, on the basis of realizing continuous feeding, its structure is simple and reliable, and the conveying stability can also be guaranteed.

[0058] In a specific example, as Figure 1 shown, the driving rod assembly can be provided with 2 pieces. In other embodiments, the driving rod assembly can be provided with more than 2 pieces.

[0059] In one embodiment, as Figure 1 shown, it further includes a driving wheel 411 and a plurality of transmission wheels 412. The driving wheel 411 is power-coupled to the output end 410 of the driving motor. The plurality of transmission wheels 412 are arranged in one-to-one correspondence with the plurality of driving rods 320. The plurality of driving rods 320 extend to the corresponding transmission wheels 412 and are fixedly connected to the transmission wheels 412. The driving wheel 411 and the plurality of transmission wheels 412 are power-coupled. In this way, it is realized that one driving motor drives the plurality of driving rods 320 to rotate simultaneously.

[0060] In one embodiment, the driving wheel 411 includes a belt wheel portion. The belt wheel portion is power-coupled to the plurality of transmission wheels 412 through a transmission belt. In another embodiment, the driving wheel 411 can be a gear, which includes a gear portion. The gear portion meshes with the plurality of transmission wheels 412 for transmission, and the plurality of transmission wheels 412 are also gears.

[0061] In one embodiment, as Figure 1 shown, it further includes a machine base 400. The plurality of feeding seats 310 are movably arranged on the machine base 400 in the vertical direction. In this way, when the feeding seat 310 moves to the lower stroke position and the clamping mechanism is in the loosened state, the feeding seat 310 can be moved to the upper stroke position, and then the clamping mechanism clamps the bar stock to realize continuous feeding.

[0062] There are various ways to drive the feeding seat 310 to move on the machine base 400. In one embodiment, the continuous feeding device further includes a guide rail 340 and a guide sliding seat 350 that cooperate with each other. One of the guide rail 340 and the guide sliding seat 350 is arranged on the machine base 400, and the other is arranged on the feeding seat 310. In this way, the feeding seat 310 can be driven to slide on the machine base 400. In another embodiment, a lead screw-nut transmission can also be adopted to drive the feeding seat 310 to move on the machine base 400.

[0063] In one embodiment, as Figure 1As shown in the figure, the driving assembly includes a cylinder 360. The cylinder 360 includes a cylinder base and a piston rod. The cylinder base is connected to one of the two feeding seats 310, and the piston rod is connected to the other of the two feeding seats 310. For example, the cylinder base is installed on the feeding seat 310 of the first feeding mechanism 300a, and the output end of the piston rod is installed on the feeding seat 310 of the second feeding mechanism 300b. Or, the cylinder base is installed on the feeding seat 310 of the second feeding mechanism 300b, and the output end of the piston rod is installed on the feeding seat 310 of the first feeding mechanism 300a. In a specific embodiment, for example, the cylinder base is installed on the feeding seat 310 of the first feeding mechanism 300a, and the output end of the piston rod is installed on the feeding seat 310 of the second feeding mechanism 300b. When the feeding seat 310 of the second feeding mechanism 300b moves to the lower stroke position, the clutch member 330 of the second feeding mechanism 300b is sleeved on the driving rod 320. At this time, because the feeding seat 310 of the first feeding mechanism 300a is in a cooperative state with the driving rod 320, the cylinder base is relatively fixed, and the feeding seat 310 of the second feeding mechanism 300b can be driven by the piston rod to move upward to the upper stroke position. When the feeding seat 310 of the first feeding mechanism 300a moves to the lower stroke position, the clutch member 330 of the first feeding mechanism 300a is sleeved on the driving rod 320. At this time, because the feeding seat 310 of the second feeding mechanism 300b is in a cooperative state with the driving rod 320, the piston rod is relatively fixed, so that the cylinder base can be driven to move by the piston rod, and then the feeding seat 310 of the first feeding mechanism 300a can be driven to move upward to the upper stroke position.

[0064] In one embodiment, as Figure 1 shown, the feeding mechanism 300 further includes a lower stroke position detection element 370. The lower stroke position detection element 370 is arranged on the machine base 400. The lower stroke position detection element 370 is used to detect whether the feeding seat 310 is in the lower stroke position. When the feeding seat 310 is in the lower stroke position, the corresponding clamping mechanism can be controlled to loosen and the clutch member 330 can be loosened and separated.

[0065] In one embodiment, the feeding mechanism 300 further includes a lower limit position detection element 380. The lower limit position detection element 380 is arranged on the machine base 400. The lower limit position detection element 380 is used to detect whether the feeding seat 310 is in the lower limit position. Generally, when the lower stroke position detection element 370 detects that the feeding seat 310 is in the lower stroke position, the corresponding clamping member is controlled to loosen and the clutch member is loosened and separated, and the feeding seat 310 will not continue to move to the lower limit position under the transmission of the driving rod. If the lower limit position detection element 380 detects that the feeding seat 310 is in the lower limit position, it is necessary to stop the machine for maintenance. The lower limit position detection element 380 plays a protective role.

[0066] In one embodiment, as Figure 4 shown, in the initial state of the present application, the feeding seat 310 of the second feeding mechanism 300b is arranged close to the upper stroke position, and the feeding seat 310 of the first feeding mechanism 300a is arranged close to the lower stroke position. In this way, it is very difficult for the feeding seat 310 of the second feeding mechanism 300b and the feeding seat 310 of the first feeding mechanism 300a to be simultaneously located at the lower stroke position.

[0067] If the feeding seat 310 of the second feeding mechanism 300b and the feeding seat 310 of the first feeding mechanism 300a are simultaneously located at the lower stroke position, it is necessary to control the feeding seat 310 of the second feeding mechanism 300b or the feeding seat 310 of the first feeding mechanism 300a to quickly move towards the upper stroke position. For example, control the feeding seat 310 of the second feeding mechanism 300b to quickly move towards the upper stroke position. Then, after it moves to the upper stroke position, control the clamping mechanism of the second feeding mechanism 300b to clamp the bar stock, and then control the clamping mechanism of the first feeding mechanism 300a to release the bar stock to achieve continuous pressure of the bar stock on the substrate. Among them, the distance between the lower stroke position and the lower limit position can be used as the buffer distance for the movement of the feeding seat of the first feeding mechanism 300a. After the clamping mechanism of the second feeding mechanism 300b clamps the bar stock, control the clamping mechanism of the first feeding mechanism 300a to release the bar stock, and then drive the feeding seat of the first feeding mechanism 300a to move towards the upper stroke position. Generally, the stroke of the feeding seat 310 is the lower stroke position and the upper stroke position. When the feeding seat 310 of the second feeding mechanism 300b and the feeding seat 310 of the first feeding mechanism 300a are simultaneously located at the lower stroke position, the feeding seat 310 of the second feeding mechanism 300b or the feeding seat 310 of the first feeding mechanism 300a can continue to move towards the lower limit position.

[0068] The present application also proposes a friction stir additive manufacturing device with continuous feeding. As Figure 1 shown, the friction stir additive manufacturing device with continuous feeding includes the above continuous feeding device and a movable main shaft 10. The main shaft 10 is provided with a rotatable stirring head 11. The stirring head 11 is provided with a stirring head accommodation space for accommodating the bar stock 9, and the feeding port of the stirring head accommodation space is directly opposite to the feeding ports of the feeding seats 310 of multiple feeding mechanisms 300. The continuous feeding device continuously supplies materials to the stirring head 11, so as to realize continuous friction stir deposition manufacturing.

[0069] The present application also proposes a chuck device, as Figure 5As shown, in one embodiment, the mounting plate 20 is provided with a through-hole 21 for the bar to pass through. The bar is conveyed into the through-hole 21 from above and conveyed out from below. In practical applications, the bar will rotate during the conveying process. The housing is rotatably mounted on the mounting plate 20, and the axis of the housing coincides with the axis of the through-hole 21. A hydraulic chamber and a through-hole penetrating the housing along the axis of the housing are formed in the housing, and the axis of the through-hole coincides with the axis of the through-hole 21. The piston 16 is slidably mounted in the hydraulic chamber, and the piston 16 includes a driving section extending radially outward. The driving member 15 is slidably mounted on the housing along the axial direction, and the axis of the driving member 15 is parallel to the axis of the housing along the radial direction of the housing. The driving member 15 includes a first driving surface and a second driving surface provided at both axial ends thereof. The first driving surface extends along the radial direction of the piston 16, faces the driving section, and is adapted to abut against the driving section. A plurality of driving members 15 are provided, and the plurality of driving members 15 are evenly spaced along the circumferential direction of the housing. The second driving surface extends gradually downward and obliquely outward in the radial direction. A plurality of clamping members 14 are provided corresponding to the plurality of driving members 15 one by one. The clamping member 14 is slidably mounted on the housing along a first direction. The moving direction of the driving member 15 and the axial direction of the housing both intersect with the first direction. The clamping member 14 includes a first end close to the axis of the housing and a second end away from the axis of the housing. The second end is adapted to fit with the second driving surface. The end surface of the first end extends along the axial direction of the housing, and the end surfaces of the first ends of the plurality of clamping members 14 are adapted to extend into the through-hole from the peripheral wall of the through-hole along the radial direction of the through-hole.

[0070] It can be understood that the mounting plate 20 is connected to the overall rod feeding device. The chuck, as the clamping component for the rod in the rod feeding device, has a main shaft channel opened at the central axis position of the overall chuck. The through hole 21, as a part of the main shaft channel, becomes the top part of the main shaft channel. The rod is conveyed vertically downward through the main shaft channel. When the rod is conveyed to the designated position, liquid is introduced into the upper half of the hydraulic cavity, pushing the piston 16 in the hydraulic cavity to move downward. During the downward movement of the piston 16, it pushes the driving member 15 to move downward, thereby driving the clamping member 14 to squeeze inward to clamp the rod. It should be clear that during the conveying process, the rod is in a rotating state. Although the overall chuck can rotate with the rod to reduce the radial force during its rotation, there is still a large radial force applied to the clamping member 14. At this time, the setting direction of the clamping member 14 can reduce the influence of the radial force on the chuck and reduce the loss. Since the clamping member 14 and the driving member 15 are not vertically arranged, when the radial force generated by the rotating rod contacts the clamping member 14, it will give the clamping member 14 a radially outward force. Under the drive of this radial force, the clamping member 14 has a tendency to move outward along its extending direction, thereby converting this force into two forces, one part along the radial direction outward and one part along the vertical direction upward to be transmitted to the driving member 15. Thus, this radial force can be decomposed and converted to reduce the loss and damage of the overall chuck caused by the radial force brought by the rotation of the rod.

[0071] According to an embodiment of the present invention, the chuck further includes a mounting seat, the mounting seat is fixedly connected to the mounting plate 20, the mounting seat is hollow, and the housing is rotatably mounted in the mounting seat.

[0072] According to an embodiment of the present invention, the housing includes a first shell and a second shell. At least part of the first shell is hollow, and one end of the first shell is open. The second shell closes the open end of the first shell to form a hydraulic cavity. The driving member 15 and the clamping member 14 are both mounted on the first shell.

[0073] According to an embodiment of the present invention, the chuck body 10 is integrally mounted on the mounting plate 20. The mounting seat is the outer shell 11, the first shell is the inner shell 12, and the second shell is the inner shell top cover 13. The inner wall of the outer shell 11 contacts the outer wall of the inner shell 12. The outer shell 11 and the inner shell 12 are connected by a second bearing 40 so that relative rotation is suitable to occur between the outer shell 11 and the inner shell 12. The inner part of the inner shell 12 has an accommodation space. The inner shell top cover 13 and the inner wall of the accommodation space cooperate to form a hydraulic cavity. The outer shell 11 is provided with an outer shell hole for conveying liquid to the inside of the inner shell 12. The inner shell 12 is provided with a matching inner shell hole. The liquid entering from the outer shell hole can enter the hydraulic cavity through the inner shell hole to drive the piston 16 to rise or fall. The liquid in the hydraulic cavity and the piston 16 together constitute the power source of the clamping member 14.

[0074] According to an embodiment of the present invention, the first housing is axially spaced apart from the mounting plate 20. The second housing includes a mounting flange, and at least a part of the second housing extends into the hydraulic chamber, and the mounting flange abuts against the end of the first housing facing the mounting plate 20.

[0075] According to an embodiment of the present invention, the first housing is the inner housing 12, and the second housing is the inner housing top cover 13. The inner housing top cover 13 is fixedly connected to the inner housing 12 and rotates synchronously therewith. The inner housing top cover 13 and the mounting plate 20 are connected by a first bearing 30. Specifically, a bearing groove 22 is provided in the through hole 21 of the mounting plate 20, and the first bearing 30 is disposed in the bearing groove 22. The inner housing top cover 13 includes two parts, one part is a cylindrical structure, and the other part is a disc structure. The cylindrical structure is received in the through hole 21, and the disc structure is fixed to (or integrally formed with) the bottom of the cylindrical structure and cooperates with the top of the inner housing 12 to form a receiving space. A rod through hole 131 is provided in the central axis of the cylindrical part, and the rod through hole 131 constitutes a part of the main shaft passage. The disc structure does not contact the bottom surface of the mounting plate 20 and there is a gap left. The disc structure is connected to the top end of the inner housing 12.

[0076] According to an embodiment of the present invention, the inner housing top cover 13 is movably connected to the mounting plate 20 by a first bearing 30, the inner housing 12 is movably connected to the outer housing 11 by a second bearing 40, the inner housing top cover 13 is fixedly connected to the inner housing 12, and the outer housing 11 is fixedly connected to the mounting plate 20. Thus, when the bar rotates, the inner housing 12 and the inner housing top cover 13 rotate with the bar, while the outer housing 11 is fixed and does not rotate with the bar.

[0077] According to an embodiment of the present invention, the driving member 15 is disposed in the accommodating cavity 123. The accommodating cavity 123 includes a vertical channel 121 and an inclined channel 122. The top end of the vertical channel 121 communicates with the accommodating space. The driving member 15 is disposed in the vertical channel 121. The vertical channel 121 limits the driving member 15 so that it can only move up and down in the vertical direction. The top of the driving member 15 is adapted to rise into the accommodating space. The inclined channel 122 is not horizontally disposed. The inclined channel 122 communicates with the vertical channel 121. One end of the inclined channel 122 close to the main shaft channel is lower in height, and one end close to the vertical channel 121 is higher. The clamping member 14 is disposed inside the inclined channel 122. The inclined channel 122 limits the clamping member 14 to move only along the extending direction of the inclined channel 122. Thus, when the clamping member 14 is subjected to the radial force generated by the rotation of the bar, there will be a tendency to retreat. In this process, the radial force will be transmitted along the direction of the inclined channel 122 until it is transmitted to the driving member 15. Because the inclined channel 122 is not horizontally disposed but has a certain angle, when the bar transmits the radial force to the clamping member 14, the force extending horizontally and radially outward will be converted into the force along the extending direction of the inclined channel 122. Thus, a part of the completely horizontal force is converted into the force for driving the clamping member 14 to move in the vertical direction or having the tendency of moving in the vertical direction, thereby converting part of the radial force. However, the force extending along the direction of the inclined channel 122 can be decomposed into two-directional forces, namely the vertical-direction force and the horizontal-direction force. It can be seen that due to the angle setting of the inclined channel 122, part of the radial force is converted into the vertical-direction force of the driving member 15, causing it to move in the vertical direction or having the tendency of moving in the vertical direction. Only a part of the radial force still exists and may cause compression to the chuck device. But in this process, the generated compression has been reduced, and part of the radial force has been eliminated, thereby reducing the influence and damage on the chuck caused by the radial force generated by the rotation of the bar.

[0078] According to an embodiment of the present invention, the bottom end of the driving member 15 is a second driving surface, and the second driving surface is an inclined surface. One end of the clamping member 14 close to the driving member 15 is provided with an inclined surface adapted to the second driving surface. Thus, the conversion of the radial force transmission direction can be better realized.

[0079] According to an embodiment of the present invention, the additive raw material is a bar, and the bar is adapted to rotate. The bar can be a bar with a cuboid structure, or a bar with a cylindrical structure or other structures, and no limitation is made thereto. The clamping member 14 is a fixture, and the specific structure of the fixture can be adaptively adjusted according to the bar structure, and no limitation is made thereto.

[0080] According to an embodiment of the present invention, the piston 16 includes a main body section and a driving section. The axis of the main body section coincides with the axis of the driving section. The driving section extends radially outward along the main body section. The driving section is adapted to abut against the first driving surface, wherein the axial width of the driving section is smaller than the axial width of the main body section.

[0081] According to an embodiment of the present invention, the main body section is of a cylindrical structure, the driving section is of a disc structure, the main body section and the driving section are concentrically arranged, and the driving section divides the hydraulic chamber into two independent spaces. The driving section is located at the middle position of the main body section, and there are protruding parts above and below the main body section relative to the driving section. The protruding parts of the main body section are adapted to cooperate with the main shaft channel to play a limiting role. The lower surface of the driving section of the piston 16 is adapted to contact the first driving surface of the driving member 15, thereby controlling the movement of the driving member 15.

[0082] According to an embodiment of the present invention, the first housing is provided with a first limiting groove facing the hydraulic chamber, and the second housing is provided with a second limiting groove facing the hydraulic chamber. The two axial ends of the main body section are respectively installed in the first limiting groove and the second limiting groove. Thus, the piston 16 can be limited so that it can only move axially.

[0083] According to an embodiment of the present invention, the mounting seat is provided with a hydraulic inlet and a hydraulic outlet, and the hydraulic inlet and the hydraulic outlet are communicated with the hydraulic chamber.

[0084] According to an embodiment of the present invention, the inner housing 12 hole includes a first inner housing hole 124 and a second inner housing hole 125. The first inner housing hole 124 is arranged above the driving section of the piston 16 for introducing liquid above the driving section of the piston 16 to drive the piston 16 to descend; the second inner housing hole 125 is arranged below the driving section of the piston 16 for introducing liquid below the driving section of the piston 16 to drive the piston 16 to ascend.

[0085] In one embodiment, the hydraulic chamber of the present invention can be replaced with a gas chamber.

[0086] According to an embodiment of the present invention, the first housing is provided with a first through hole, the second housing is provided with a second through hole, and the piston 16 is provided with a third through hole. The through hole 21, the second through hole, the third through hole, and the first through hole are sequentially communicated, wherein the aperture of the through hole 21, the aperture of the second through hole, the aperture of the third through hole, and the aperture of the first through hole decrease sequentially.

[0087] According to an embodiment of the present invention, the main shaft channel is a through hole, and the through hole includes a first limiting hole provided on the inner housing top cover 13. The first limiting hole constitutes a part of the through hole 21, and the main body section is at least partially in contact with the first limiting hole to limit the radial movement of the piston 16.

[0088] According to an embodiment of the present invention, a perforation is formed through the inside of the main body section, that is, the third through hole, and the perforation constitutes a part of the through hole 21.

[0089] According to an embodiment of the present invention, the through hole includes a second limiting hole provided on the inner shell 12, and the main body section is at least partially in contact with the second limiting hole to limit the radial movement of the piston 16. A clamping hole is provided inside the second limiting hole, and the clamping hole forms a part of the through hole 21.

[0090] According to an embodiment of the present invention, the first limiting hole, the perforation hole, and the clamping hole are coaxially arranged and the radii decrease successively. The height of the perforation hole is lower than that of the first limiting hole and higher than that of the clamping hole. This facilitates the bar material to enter the main shaft channel from above, and the holes with successively decreasing radii are more conducive to the conveyance of the bar material.

[0091] According to an embodiment of the present invention, the chuck for the friction stir additive manufacturing device is applied to the peristaltic continuous rod feeding friction stir additive manufacturing technology. A continuous square rod with a fixed length enters from inside the mandrel. The square rod is clamped by the chuck for the friction stir additive manufacturing device, and the entire chuck for the friction stir additive manufacturing device is driven downward by an external drive. At the same time, the mandrel is connected to the machine tool spindle and rotates continuously.

[0092] According to an embodiment of the present invention, the inner shell and the outer shell use a guide ring for rotational guidance and achieve a sealing effect with a rotary seal.

[0093] According to an embodiment of the present invention, the chuck for the friction stir additive manufacturing device drives a wedge rod through a piston, and uses a wedge surface to drive the four chucks in the front, back, left, and right directions to act simultaneously. At the same time, the wedge block has a self-locking principle to prevent the chucks from retracting when the hydraulic pressure disappears. The chuck for the friction stir additive manufacturing device inserts into the intermediate mandrel through the four chucks in the front, back, left, and right directions, and can continuously rotate following the mandrel in the clamped state, ensuring that the square rod inside the mandrel can be effectively clamped even when the mandrel is rotating continuously.

[0094] According to an embodiment of the present invention, the chuck for the friction stir additive manufacturing device has a return spring - disc spring.

[0095] Compared with the fixture device in the prior art, the chuck for the friction stir additive manufacturing device uses the way that a thrust ball bearing can bear a strong radial force and a deep groove ball bearing bears a radial force, so that the chuck can meet the upsetting force used in deposition manufacturing.

[0096] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0097] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, bars, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, bars, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0098] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A continuous feeding device for friction stir additive, characterized in that: include: A feeding mechanism, the feeding mechanism comprises a chuck and a driving rod, the feeding mechanism is provided with a clutch, the driving rod drives the chuck to move through the clutch, and the chuck is used to clamp the bar; the chuck comprises a mounting plate and a chuck body, the chuck body comprises a shell, a piston, a driving member and a clamping member, a medium cavity is provided in the shell, the piston is slidably mounted in the medium cavity and is suitable for driving the driving member to move, and the driving member is suitable for driving the clamping member to move; The clamping member is slidably mounted on the housing along a first direction, and the movement direction of the driving member and the axial direction of the housing both intersect with the first direction; The clutch is suitable for holding or releasing the driving rod, and the clamp is suitable for holding or releasing the rod. When the clutch holds the driving rod, the clamp clamps the rod, and when the clutch releases the driving rod, the clamp releases the rod.

2. The device according to claim 1, characterized in that There are multiple feeding mechanisms, which are arranged vertically at intervals. The driving rod has a threaded section. The clutch has a first state in which it is threadedly matched with the driving rod and a second state in which it is separated from the driving rod. When in the first state, the driving rod can drive the feeding seat of the feeding mechanism to move along the feeding direction. When in the second state, the clutch is emptied on the driving rod. The device further comprises a driving assembly, which is used to drive the feeding seat of the feeding mechanism to move in a direction opposite to the feeding direction when the clutch member is loosely sleeved on the driving rod and the clamping member does not clamp the bar material; Among them, the multiple feeding mechanisms include at least a first feeding mechanism and a second feeding mechanism, when the feeding seat of the first feeding mechanism moves to a lower stroke position along the feeding direction, the driving component drives the feeding seat of the first feeding mechanism to move toward an upper stroke position in a direction opposite to the feeding direction, and / or, when the feeding seat of the second feeding mechanism moves to a lower stroke position along the feeding direction, the driving component drives the feeding seat of the second feeding mechanism to move toward an upper stroke position in a direction opposite to the feeding direction, and the upper stroke position and the lower stroke position are spaced apart along the feeding direction.

3. The device according to claim 1, characterized in that The mounting plate is provided with a through hole for the rod to pass through; The shell is rotatably mounted on the mounting plate, the axis of the shell coincides with the axis of the through hole, a through hole is formed in the shell and passes through the shell along the axis of the shell, and the axis of the through hole coincides with the axis of the through hole; The piston includes a drive section extending radially outward; The driving member is slidably mounted on the housing in the axial direction, and the axis of the driving member is parallel to the axis of the housing in the radial direction of the housing, and the driving member includes a first driving surface and a second driving surface arranged along two axial ends thereof, the first driving surface extends in the radial direction of the piston, the first driving surface faces the driving section, and the first driving surface is suitable for stopping the driving section, the driving member is provided with a plurality of driving members, and the plurality of driving members are evenly spaced along the circumference of the housing, and the second driving surface extends gradually downwardly from the inside to the outside in the radial direction; The clamping member includes a first end along the axial direction close to the shell and a second end away from the axis of the shell, the second end is suitable for fitting with the second driving surface, the end surface of the first end extends along the axial direction of the shell, and the end surface of the first end of the clamping member is suitable for clamping the rod; there are multiple clamping members, and the multiple clamping members are arranged in a one-to-one correspondence with the multiple driving members.

4. The device according to claim 3, characterized in that It also includes a mounting seat, which is fixedly connected to the mounting plate, the mounting seat is hollow, and the shell is rotatably mounted in the mounting seat.

5. The device according to claim 4, characterized in that The mounting seat is provided with a hydraulic inlet and a hydraulic outlet, the medium cavity is a hydraulic cavity, and the hydraulic inlet and the hydraulic outlet are communicated with the hydraulic cavity.

6. The device according to claim 3, characterized in that The housing includes a first shell and a second shell, wherein at least a portion of the first shell is hollow and one end of the first shell is open, and the second shell closes the open end of the first shell to form the medium cavity, and the driving member and the clamping member are both mounted on the first shell.

7. The device according to claim 6, characterized in that At least a portion of the second shell facing away from the first shell extends into the through hole, and the second shell is rotatably mounted on the mounting plate.

8. The device according to claim 7, characterized in that The first shell is axially spaced from the mounting plate, the second shell comprises a mounting flange, at least a portion of the second shell extends into the medium cavity, and the mounting flange abuts against an end of the first shell facing the mounting plate.

9. The device according to claim 8, characterized in that The piston comprises a main body section and a driving section, the axis of the main body section coincides with the axis of the driving section, the driving section extends radially outwardly along the main body section, and the driving section is suitable for abutting against the first driving surface.

10. The device according to claim 9, characterized in that The first shell is provided with a first limiting groove facing the medium cavity, the second shell is provided with a second limiting groove facing the medium cavity, and the axial ends of the main body section are respectively installed in the first limiting groove and the second limiting groove.

Images