Control method of continuous feeding device for friction stir additive

Abstract

The invention discloses a control method of a continuous feeding device for friction stir additive manufacturing, and belongs to the technical field of additive manufacturing. The control method comprises the following steps that a clamping piece of a first feeding mechanism is controlled to clamp a bar; a feeding seat of the first feeding mechanism is driven to move in the feeding direction; when a feeding seat of the first feeding mechanism moves to a first preset position, a clamping piece of the first feeding mechanism is controlled to loosen the bar; a clamping piece of the second feeding mechanism is in a state of clamping the bar; a feeding seat of the second feeding mechanism is driven to move in the feeding direction, and a feeding seat of the first feeding mechanism is driven to move towards a second preset position; when a feeding seat of the second feeding mechanism moves to a first preset position, a clamping piece of the second feeding mechanism is controlled to loosen the bar; a clamping piece of the first feeding mechanism is in a state of clamping the bar; and a feeding seat of the second feeding mechanism is driven to move towards a second preset position, so that continuous feeding is realized.

Description

Technical Field

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

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

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

[0004] To this end, an object of the present invention is to provide a control method for a continuous feeding device for friction stir additive manufacturing, including the following steps: S10: Control the clamping member of the first feeding mechanism to clamp the bar stock; S20: Drive the feeding seat of the first feeding mechanism to move along the feeding direction; S30: When the feeding seat of the first feeding mechanism moves to the first preset position, control the clamping member of the first feeding mechanism to release the bar stock; and when the feeding seat of the first feeding mechanism moves to the first preset position, the clamping member of the second feeding mechanism is in a state of clamping the bar stock; S40: Drive the feeding seat of the second feeding mechanism to move along the feeding direction, and drive the feeding seat of the first feeding mechanism to move towards the second preset position; S50: When the feeding seat of the second feeding mechanism moves to the first preset position, control the clamping member of the second feeding mechanism to release the bar stock; and when the feeding seat of the second feeding mechanism moves to the first preset position, the clamping member of the first feeding mechanism is in a state of clamping the bar stock; S60: Drive the feeding seat of the second feeding mechanism to move towards the second preset position.

[0005] According to the above characteristics, the present application realizes continuous feeding by setting the first feeding mechanism and the second feeding mechanism.

[0006] Optionally, the feeding device further includes a driving motor, and the driving rods of the first feeding mechanism and the second feeding mechanism are both power - coupled to the driving motor; during the operation of the continuous feeding device, the driving motor rotates continuously to drive the driving rods of the first feeding mechanism and the second feeding mechanism to rotate continuously clockwise at the same time, or continuously counter - clockwise at the same time.

[0007] Optionally, during the rotation of the driving rod, one of the feeding seats of the first feeding mechanism and the feeding seat of the second feeding mechanism is driven to move in the feeding direction, and the other of the feeding seats of the first feeding mechanism and the feeding seat of the second feeding mechanism is driven to move in the direction opposite to the feeding direction.

[0008] Optionally, during the rotation of the driving rod, at least one of the feeding seats of the first feeding mechanism and the feeding seat of the second feeding mechanism is driven to move in the feeding direction. When any one of the feeding seats of the first feeding mechanism and the feeding seat of the second feeding mechanism moves to the first preset position, the corresponding feeding seat is further driven by a driving component to move in the direction opposite to the feeding direction.

[0009] Optionally, at least a part of the driving rod is a reciprocating lead screw, and the feeding seat is in threaded fit with the reciprocating lead screw; in step S30, when the feeding seat of the first feeding mechanism moves to the first preset position, the feeding seat of the second feeding mechanism is located at the second preset position; in step S50, when the feeding seat of the second feeding mechanism moves to the first preset position, the feeding seat of the first feeding mechanism is located at the second preset position.

[0010] Optionally, in step S30, first control the clamping member of the second feeding mechanism to clamp the bar stock, and then control the clamping member of the first feeding mechanism to release the bar stock; in step S50, first control the clamping member of the first feeding mechanism to clamp the bar stock, and then control the clamping member of the second feeding mechanism to release the bar stock.

[0011] Optionally, the path of the feeding seat moving on the reciprocating lead screw further includes a lower origin position and an upper origin position. The second preset position, the upper origin position, the lower origin position, and the first preset position are arranged at intervals in the feeding direction; the distance between the lower origin position and the first preset position is d1, and the distance between the upper origin position and the second preset position is d2, and d1 = d2; before step S10, the feeding seat of the first feeding mechanism is located at the upper origin position, and the feeding seat of the second feeding mechanism is located at the lower origin position, or the feeding seat of the first feeding mechanism is located at the lower origin position, and the feeding seat of the second feeding mechanism is located at the upper origin position.

[0012] Optionally, it is also detected whether the feeding seats of the first feeding mechanism and the second feeding mechanism are simultaneously located at the lower origin position and the upper origin position respectively; and / or it is also detected whether the feeding seats of the first feeding mechanism and the second feeding mechanism are simultaneously located at the upper origin position and the lower origin position respectively; if not, an abnormal alarm is issued.

[0013] Optionally, at least part of the driving rod is a lead screw, and the feeding seat is in threaded engagement with the lead screw; after the clamping member of the first feeding mechanism releases the bar stock, the driving assembly is used to drive the feeding seat of the first feeding mechanism to move towards the second preset position; or, after the clamping member of the second feeding mechanism releases the bar stock, the driving assembly is used to drive the feeding seat of the second feeding mechanism to move towards the second preset position.

[0014] Optionally, when the feeding seats of the first feeding mechanism and the second feeding mechanism simultaneously move to the first preset position, control the clamping member of the second feeding mechanism to release the bar stock and move towards the second preset position. After the feeding seat of the second feeding mechanism moves to the second preset position, control the clamping member of the second feeding mechanism to clamp the bar stock, and then control the clamping member of the first feeding mechanism to release the bar stock; or, when the feeding seats of the first feeding mechanism and the second feeding mechanism simultaneously move to the first preset position, control the clamping member of the first feeding mechanism to release the bar stock and move towards the second preset position. After the feeding seat of the first feeding mechanism moves to the second preset position, control the clamping member of the first feeding mechanism to clamp the bar stock, and then control the clamping member of the second feeding mechanism to release the bar stock.

[0015] Optionally, the feeding seat also has a lower limit position in the moving path of the lead screw, and the second preset position, the first preset position, and the lower limit position are arranged at intervals along the feeding direction; when the feeding seat of the first feeding mechanism and / or the feeding seat of the second feeding mechanism moves to the lower limit position, an abnormal alarm is issued.

[0016] 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 learned through the practice of the present invention. Description of the Drawings

[0017] The above-mentioned and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the drawings, where:

[0018] Figure 1 It is a schematic structural diagram of a continuous feeding device according to an embodiment of the present invention;

[0019] Figure 2 It is according to Figure 1 A schematic diagram of the reciprocating lead screw of the continuous feeding device.

[0020] Figure 3 It is according to Figure 1 A schematic diagram of the operation of the continuous feeding device;

[0021] Figure 4 It is according to Figure 1 Another schematic diagram of the operation of the continuous feeding device;

[0022] Figure 5Schematic structural diagram of a continuous feeding device according to another embodiment of the present invention;

[0023] Figure 6 According to Figure 5 Schematic operation diagram of the continuous feeding device;

[0024] Figure 7 According to Figure 5 Another schematic operation diagram of the continuous feeding device;

[0025] Figure 8 According to Figure 5 Initial state diagram of the continuous feeding device.

[0026] Reference numerals:

[0027] Frame 1; partition 2; bar stock 9; main shaft 10; stirring head 11;

[0028] Embodiment 1:

[0029] Feeding mechanism 100; first feeding mechanism 100a; second feeding mechanism 100b;

[0030] Feeding seat 110; clamping member 111; driving rod 120; reciprocating lead screw 121; first end 121a; second end 121b;

[0031] Lower limit detection element 130; upper limit detection element 140; lower origin detection element 150; upper origin detection element 160;

[0032] Driving device 200; driving gear 210; transmission gear 220;

[0033] Embodiment 2:

[0034] Guide member 12; auxiliary pressing rod member 13;

[0035] Feeding mechanism 300; first feeding mechanism 300a; second feeding mechanism 300b;

[0036] Feeding seat 310; feeding port 311;; driving rod 320; clutch member 330;

[0037] Guide rail 340; guide sliding seat 350; driving member 360; lower stroke position detection element 370; lower limit position detection element 380;

[0038] Machine base 400; output end 410 of the driving motor; driving wheel 411; transmission wheel 412. Detailed implementation manners

[0039] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0040] The core of friction stir deposition manufacturing based on bars lies in feeding a rotating additive bar to the surface of a substrate or a 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 material combines with the substrate or the deposited layer to form a deposited layer. As the stirring head moves, new deposited layers are continuously added on the deposited layer, ultimately forming a three-dimensional solid part.

[0041] As Figure 1 shown, the friction stir additive manufacturing equipment 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 bar 9 to rotate and friction on the surface of the substrate or the deposited layer, thus realizing deposition manufacturing.

[0042] According to the description of the background art, continuous bar 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 control method for a continuous feeding device for friction stir additive manufacturing.

[0043] As Figure 1 shown, in one of the embodiments, the feeding device includes a plurality of feeding mechanisms 100 arranged at intervals in the vertical direction. The feeding mechanism 100 includes a feeding seat 110 and a driving rod 120. The driving rod 120 is used to drive the feeding seat 110 to move along the feeding direction on the driving rod 120. For example, the vertical direction is the feeding direction. The movement path of the feeding seat 110 at least includes a first preset position 121a and a second preset position 121b. The second preset position 121b and the first preset position 121a are arranged at intervals along the feeding direction. The feeding seat 110 is provided with a clamping member 111, and the clamping member 111 is adapted to clamp the bar. Thus, the clamping member 111 can have a state of clamping the bar and a state of releasing the bar. The plurality of feeding mechanisms 100 at least includes a first feeding mechanism 100a and a second feeding mechanism 100b.

[0044] The control method of the feeding device includes the following steps:

[0045] S10: Control the clamping member 111 of the first feeding mechanism 100a to clamp the bar;

[0046] S20: Drive the feeding seat 110 of the first feeding mechanism 100a to move along the feeding direction;

[0047] S30: When the feeding seat 110 of the first feeding mechanism 100a moves to the first preset position 121a, control the clamping member 111 of the first feeding mechanism 100a to release the bar stock, and when the feeding seat 110 of the first feeding mechanism 100a moves to the first preset position 121a, the clamping member 111 of the second feeding mechanism 100b is in a state of clamping the bar stock;

[0048] S40: Drive the feeding seat 110 of the second feeding mechanism 100b to move along the feeding direction, and drive the feeding seat of the first feeding mechanism 100a towards the second preset position 121b;

[0049] S50: When the feeding seat 110 of the second feeding mechanism 100b moves to the first preset position 121a, control the clamping member 111 of the second feeding mechanism 100b to release the bar stock; and when the feeding seat 110 of the second feeding mechanism 100b moves to the first preset position 121a, the clamping member 111 of the first feeding mechanism 100a is in a state of clamping the bar stock;

[0050] S60: Drive the feeding seat 110 of the second feeding mechanism 100b to move to the second preset position 121b;

[0051] Loop like this.

[0052] It can be understood that after the clamping member 111 of the first feeding mechanism 100a clamps the bar stock, drive the feeding seat 110 of the first feeding mechanism 100a to move along the feeding direction, thereby driving the bar stock to move along the feeding direction. When the feeding seat 110 of the first feeding mechanism 100a moves to the first preset position 121a, the clamping member 111 of the second feeding mechanism 100b is in a state of clamping the bar stock, so that the feeding seat 110 of the second feeding mechanism 100b can continue to be driven to move along the feeding direction, thereby driving the bar stock to continue to move along the feeding direction, so that the bar stock can be conveyed to the mixing head 11, thereby realizing continuous deposition manufacturing.

[0053] Among them, when the feeding seat 110 of the first feeding mechanism 100a moves to the first preset position 121a, also control the clamping member 111 of the first feeding mechanism 100a to release the bar stock, and then control the feeding seat of the first feeding mechanism 100a to move towards the second preset position 121b. For example, when the feeding seat of the first feeding mechanism 100a moves to the second preset position 121b, also control the clamping member 111 of the first feeding mechanism 100a to clamp the bar stock, and then drive the feeding seat 110 of the first feeding mechanism 100a to move along the feeding direction, so as to realize continuous feeding.

[0054] Similarly, when the feeding seat 110 of the second feeding mechanism 100b moves to the first preset position 121a, the clamping member 111 of the second feeding mechanism 100b is also controlled to release the bar stock; then, the feeding seat 110 of the second feeding mechanism 100b is controlled to move towards the second preset position 121b. For example, when the feeding seat 110 of the second feeding mechanism 100b moves to the second preset position 121b, the clamping member 111 of the second feeding mechanism 100b is also controlled to clamp the bar stock, and then the feeding seat 110 of the second feeding mechanism 100b is driven to move along the feeding direction, thus realizing continuous feeding.

[0055] In this way, when the feeding seat of the first feeding mechanism 100a of the present application moves to the first preset position 121a, the bar stock is released, then it turns and moves to the second preset position 121b, and clamps the bar stock. When the feeding seat of the second feeding mechanism 100b moves to the first preset position 121a, the bar stock is released, then it turns and moves to the second preset position 121b, and clamps the bar stock. Continuous feeding is realized through the cooperation of the first feeding mechanism 100a and the second feeding mechanism 100b.

[0056] In one of the embodiments, the power source for driving the driving rod 120 of the present application is a driving motor, and the driving rods 120 of both the first feeding mechanism 100a and the second feeding mechanism 100b are power-coupled to the driving motor, that is, one driving motor is used to drive multiple driving rods 120 to rotate simultaneously to realize the movement of multiple feeding seats 110. During the operation of the continuous feeding device, the driving motor can continuously rotate to drive the driving rods 120 of the first feeding mechanism 100a and the second feeding mechanism 100b to continuously rotate clockwise or counterclockwise simultaneously. In this way, by setting one driving motor to drive the first feeding mechanism 100a and the second feeding mechanism 100b to work, compared with setting two driving motors to drive the first feeding mechanism 100a and the second feeding mechanism 100b respectively, the driving force output by one driving motor is relatively stable and easy to control, avoiding the phenomenon of non-synchronization of the two driving motors.

[0057] In one of the embodiments, during the simultaneous rotation of the driving rods 120, one of the feeding seats 110 of the first feeding mechanism 100a and the feeding seats 110 of the second feeding mechanism 100b is driven to move along the feeding direction, and the other of the feeding seats 110 of the first feeding mechanism 100a and the feeding seats 110 of the second feeding mechanism 100b is driven to move in the direction opposite to the feeding direction, that is, the feeding seats 110 of the first feeding mechanism 100a and the second feeding mechanism 100b operate alternately to realize continuous feeding.

[0058] In another embodiment, during the simultaneous rotation of the driving rod 120, at least one of the feeding seats 110 of the first feeding mechanism 100a and the feeding seat 110 of the second feeding mechanism 100b is driven to move in the feeding direction. When any one of the feeding seats 110 of the first feeding mechanism 100a and the feeding seat 110 of the second feeding mechanism 100b moves to the first preset position 121a, a driving component is further used to drive the corresponding feeding seat to move in the direction opposite to the feeding direction. It can be understood that, for example, during the simultaneous rotation of the driving rod 120, the feeding seats 110 of the first feeding mechanism 100a and the second feeding mechanism 100b are driven to move simultaneously in the feeding direction. When the feeding seat 110 of the first feeding mechanism 100a moves to the first preset position 121a, a driving component, such as a cylinder, is used to drive the feeding seat 110 of the first feeding mechanism 100a to move in the direction opposite to the feeding direction. Similarly, when the feeding seat 110 of the second feeding mechanism 100b moves to the first preset position 121a, a driving component is used to drive the feeding seat 110 of the second feeding mechanism 100b to move in the direction opposite to the feeding direction, thus realizing peristaltic feeding.

[0059] As can be seen from the above, based on a single driving motor, the present application can implement two schemes of alternating feeding and peristaltic feeding.

[0060] Next, the scheme of alternating feeding, that is, Embodiment 1, will be specifically described.

[0061] In one of the embodiments, as Figure 1 shown, at least a part of the driving rod 120 is a reciprocating lead screw, the feeding seat 110 is in threaded engagement with the reciprocating lead screw, the reciprocating lead screw has a threaded section, and the two ends of the threaded section are a first end and a second end. When the feeding seat 110 moves to the first end on the reciprocating lead screw, it is located at the first preset position, and when the feeding seat 110 moves to the second end on the reciprocating lead screw, it is located at the second preset position. In this way, the feeding seat 110 can move back and forth between the first preset position and the second preset position under the action of the reciprocating lead screw.

[0062] In step S30, when the feeding seat 110 of the first feeding mechanism 100a moves to the first preset position, the feeding seat 110 of the second feeding mechanism 100b is located at the second preset position. In this way, when the feeding seat 110 of the second feeding mechanism 100b moves from the second preset position to the first preset position, the feeding seat 110 of the first feeding mechanism 100a will move from the first preset position to the second preset position.

[0063] In step S50, when the feeding seat of the second feeding mechanism 100b moves to the first preset position, the feeding seat of the first feeding mechanism 100a is located at the second preset position. Thus, when the feeding seat of the first feeding mechanism 100a moves from the second preset position to the first preset position, the feeding seat 110 of the second feeding mechanism 100b will move from the first preset position to the second preset position.

[0064] In this way, in this application, either the clamping member of the first feeding mechanism 100a clamps the bar stock and moves it along the feeding direction towards the first preset position, or the clamping member of the second feeding mechanism 100b clamps the bar stock and moves it along the feeding direction towards the first preset position, thus realizing continuous feeding using a reciprocating lead screw.

[0065] In one of the embodiments, in step S30, first control the clamping member of the second feeding mechanism 100b to clamp the bar stock, and then control the clamping member of the first feeding mechanism 100a to release the bar stock.

[0066] In step S50, first control the clamping member of the first feeding mechanism 100a to clamp the bar stock, and then control the clamping member of the second feeding mechanism 100b to release the bar stock.

[0067] Thus, when the feeding seat 110 of the first feeding mechanism 100a moves to the first preset position 121a, the feeding seat 110 of the second feeding mechanism 100b is located at the second preset position. First control the clamping member of the second feeding mechanism 100b to clamp the bar stock, and then control the clamping member of the first feeding mechanism 100a to release the bar stock. In this way, a continuous pressure can be applied between the bar stock and the substrate, and the thrust magnitude is constant without sudden changes, ensuring the stability of the deposition parameters during friction stir deposition manufacturing.

[0068] Similarly, when the feeding seat 110 of the second feeding mechanism 100b moves to the first preset position 121a, the feeding seat 110 of the first feeding mechanism 100a is located at the second preset position. First control the clamping member of the first feeding mechanism 100a to clamp the bar stock, and then control the clamping member of the second feeding mechanism 100b to release the bar stock. In this way, a continuous pressure can be applied between the bar stock and the substrate, and the thrust magnitude is constant without sudden changes, ensuring the stability of the deposition parameters during friction stir deposition manufacturing.

[0069] In one of the embodiments, as Figure 4 shown, the path of the feeding seat moving on the threaded section further includes a lower origin position and an upper origin position. The second preset position, the upper origin position, the lower origin position, and the first preset position are arranged at intervals along the feeding direction;

[0070] The distance between the lower origin position and the first preset position is d1, and the distance between the upper origin position and the second preset position is d2, and d1 = d2;

[0071] Before step S10, the feeding seat 110 of the first feeding mechanism 100a is located at the lower origin position, and the feeding seat 110 of the second feeding mechanism 100b is located at the upper origin position. That is, in the initial state, the feeding seat 110 of the first feeding mechanism 100a is located at the lower origin position, and the feeding seat 110 of the second feeding mechanism 100b is located at the upper origin position. In this way, it can be ensured that when the feeding seat 110 of the first feeding mechanism 100a moves to the first preset position, the feeding seat 110 of the second feeding mechanism 100b moves to the second preset position. Alternatively, the feeding seat 110 of the first feeding mechanism 100a is located at the upper origin position, and the feeding seat 110 of the second feeding mechanism 100b is located at the lower origin position, which can ensure that when the feeding seat 110 of the second feeding mechanism 100b moves to the first preset position, the feeding seat 110 of the first feeding mechanism 100a moves to the second preset position.

[0072] In one of the embodiments, it is also detected whether the feeding seat 110 of the first feeding mechanism 100a and the feeding seat 110 of the second feeding mechanism 100b are respectively located at the lower origin position and the upper origin position at the same time; it can be understood that, as Figure 3 shown, when the feeding seat 110 of the first feeding mechanism 100a moves from the second preset position to the first preset position, it will pass through the upper origin position and the lower origin position. During the process that the feeding seat 110 of the second feeding mechanism 100b moves from the first preset position to the second preset position, it will pass through the lower origin position and the upper origin position. When the feeding seat 110 of the first feeding mechanism 100a and the feeding seat 110 of the second feeding mechanism 100b are not respectively located at the lower origin position and the upper origin position at the same time, there will be a problem of abnormal commutation. In this case, an abnormal alarm is issued, and then it is repaired.

[0073] Similarly, when the feeding seat 110 of the first feeding mechanism 100a and the feeding seat 110 of the second feeding mechanism 100b are not respectively located at the upper origin position and the lower origin position at the same time, there will be a problem of abnormal commutation. In this case, an abnormal alarm is issued, and then it is repaired.

[0074] As Figures 1 - 4 shown, the specific structure of the feeding device in which at least part of the driving rod 120 is a reciprocating lead screw is described in detail below.

[0075] As Figure 1 and Figure 2As shown, the continuous feeding device for friction stir additive manufacturing of the present application includes a plurality of feeding mechanisms 100, which are arranged at intervals in the vertical direction. Among them, each of the plurality of feeding mechanisms 100 includes a feeding base 110 and a driving rod 120. At least a part of the driving rod 120 is a reciprocating screw rod 121. The feeding base 110 is in threaded cooperation with the driving rod 120. Each of the plurality of feeding bases 110 is provided with a feeding port and a clamping member 111. The clamping member 111 is installed on the feeding base 110 and is adapted to clamp the additive rod 9. The feeding ports of the feeding bases 110 of the plurality of feeding mechanisms 100 are facing each other. Among them, the plurality of feeding mechanisms 100 at least include a first feeding mechanism 100a and a second feeding mechanism 100b. The driving rod 120 includes a threaded section with threads. The threaded section has a first end 121a and a second end 121b along the axial direction of the driving rod 120. When the feeding base 110 of the first feeding mechanism 100a moves to the first end 121a of the threaded section of the driving rod 120 of the first feeding mechanism 100a, the feeding base 110 of the second feeding mechanism 100b is located at the second end 121b of the threaded section of the driving rod 120 of the second feeding mechanism 100b. When the feeding base 110 of the first feeding mechanism 100a moves to the second end 121b of the threaded section of the driving rod 120 of the first feeding mechanism 100a, the feeding base 110 of the second feeding mechanism 100b is located at the first end 121a of the threaded section of the driving rod 120 of the second feeding mechanism 100b.

[0076] It can be understood that as Figure 1 and Figure 2 shown, the reciprocating screw rod 121 usually has two thread grooves with the same pitch and opposite helix directions, and the two ends are connected by transition curves. The threaded cooperation between the feeding base 110 and the driving rod 120 is the cooperation with the threaded section of the driving rod 120. The threaded section has a first end 121a and a second end 121b along the axial direction of the driving rod 120. In this way, when the reciprocating screw rod 121 rotates and is in threaded cooperation with the feeding base 110, the feeding base 110 can reciprocate between the first end 121a and the second end 121b. That is, after the feeding base 110 moves to the first end 121a, it will turn and move towards the second end 121b, and after moving to the second end 121b, it will turn and move towards the first end 121a. Through the arrangement of the reciprocating screw rod 121 in the present application, the reciprocating movement of the feeding base 110 can be realized without the need for the motor to reverse.

[0077] A clamping member 111 is further provided on the feeding base 110. The clamping member 111 can be in a clamping state and a loosening state. When the clamping member 111 is in the clamping state, that is, when the clamping member 111 clamps the additive rod 9, the reciprocating screw rod 121 can drive the feeding base 110 to move along the axis of the additive rod 9 towards the substrate, that is, in the feeding direction, so as to feed the stirring head 11.

[0078] In order to achieve continuous feeding, the characteristics of the reciprocating lead screw 121 can be utilized. That is, at least a first feeding mechanism 100a and a second feeding mechanism 100b are provided. When the feeding seat 110 of the first feeding mechanism 100a moves to the first end 121a of the threaded section of the driving rod 120 of the first feeding mechanism 100a, the feeding seat 110 of the second feeding mechanism 100b is located at the second end 121b of the threaded section of the driving rod 120 of the second feeding mechanism 100b. When the feeding seat 110 of the second feeding mechanism 100b moves to the first end 121a of the threaded section of the driving rod 120 of the second feeding mechanism 100b, the feeding seat 110 of the first feeding mechanism 100a is located at the second end 121b of the threaded section of the driving rod 120 of the first feeding mechanism 100a.

[0079] Specifically, for the threaded section of the reciprocating lead screw 121 provided on the driving rod 120, its second end 121b and first end 121a can be arranged along the feeding direction. Of course, they can also be arranged in the direction opposite to the feeding direction. For the convenience of description, in the following content, without specific limitation, the second end 121b and the first end 121a of the threaded section are both arranged along the feeding direction.

[0080] Similarly, the second feeding mechanism 100b and the first feeding mechanism 100a can be arranged along the feeding direction or in the direction opposite to the feeding direction; for the convenience of description, in the following content, without specific limitation, the second feeding mechanism 100b and the first feeding mechanism 100a are both arranged at intervals along the feeding direction.

[0081] As Figures 1 - 3 shown, when the clamping member 111 of the first feeding mechanism 100a clamps the bar stock 9 and moves to the first end 121a through the feeding seat 110 of the first feeding mechanism 100a, the clamping member 111 of the second feeding mechanism 100b is in the loosened state and moves to the second end 121b through the feeding seat 110 of the second feeding mechanism 100b. Then the clamping member 111 of the second feeding mechanism 100b clamps the bar stock 9 and moves to the first end 121a through the feeding seat 110 of the second feeding mechanism 100b, and the clamping member 111 of the first feeding mechanism 100a is in the loosened state and moves to the second end 121b through the feeding seat 110 of the first feeding mechanism 100a. By circulating in this way, continuous feeding of the bar stock 9 is achieved.

[0082] In this application, through the setting of the reciprocating lead screw 121, the reciprocating movement of the feeding seat 110 can be achieved without the need for the motor to reverse, thereby realizing continuous feeding, and its structure is simple and reliable.

[0083] In one embodiment, the drive rods 120 of the first feeding mechanism 100a and the drive rods 120 of the second feeding mechanism 100b can be respectively provided with drive devices 200 for driving to control the rotation of the drive rods 120 of the first feeding mechanism 100a and the drive rods 120 of the second feeding mechanism 100b, and further control the alternating movement of the feeding seats 110 of the first feeding mechanism 100a and the feeding seats 110 of the second feeding mechanism 100b.

[0084] In one embodiment, the drive rods 120 of the first feeding mechanism 100a and the drive rods 120 of the second feeding mechanism 100b can be coaxially connected. The threaded sections of the drive rods 120 of the second feeding mechanism 100b and the threaded sections of the drive rods 120 of the first feeding mechanism 100a can be arranged at intervals along the feeding direction. In this way, a drive device 200, such as a drive motor, can be provided to drive the drive rods 120 of the first feeding mechanism 100a and the drive rods 120 of the second feeding mechanism 100b to rotate simultaneously. In this application, a single motor is used to drive the movement of the two feeding seats to achieve alternating feeding. The thrust is constant and there will be no sudden change, ensuring the stability of the deposition parameters during friction stir deposition manufacturing.

[0085] In the above embodiment, the feeding mechanism 100 can also be provided with guide rods. The guide rods are arranged parallel and at intervals to the drive rods 120. The feeding seats 110 are sleeved on the guide rods in a loose fit manner, so that the feeding seats 110 are in sliding fit with the guide rods. In this way, the movement of the feeding seats can be made smoother.

[0086] In one embodiment, the drive rods 120 of the first feeding mechanism 100a and the drive rods 120 of the second feeding mechanism 100b can be staggeredly arranged. For example, the first feeding mechanism 100a can be provided with at least two drive rods 120, and the second feeding mechanism 100b can be provided with at least two drive rods 120. The arrangement of multiple drive rods 120 in this way can share the pressure on the feeding seats and is beneficial to extending the service life of the drive rods 120.

[0087] In one embodiment, the feeding mechanism 100 can also be provided with guide rods. The guide rods are arranged parallel and at intervals to the drive rods 120. The feeding seats 110 are sleeved on the guide rods in a loose fit manner, so that the feeding seats 110 are in sliding fit with the guide rods. In this way, the movement of the feeding seats can be made smoother.

[0088] In the above embodiments, the driving rod 120 of the first feeding mechanism 100a and the guiding rod of the second feeding mechanism 100b may be connected or integrated. The driving rod 120 of the second feeding mechanism 100b and the guiding rod of the first feeding mechanism 100a may be connected or integrated. It can be understood that the driving rod 120 of the first feeding mechanism 100a and the guiding rod of the second feeding mechanism 100b are connected to form a total driving rod 120, and the driving rod 120 of the second feeding mechanism 100b and the guiding rod of the first feeding mechanism 100a are connected to form a total driving rod 120. The driving rod arranged in this way can not only drive the two feeding seats 110 to move, but also guide them.

[0089] In the above embodiments, as Figure 1 shown, the continuous feeding device may be provided with 4 total driving rods 120. Each feeding mechanism 100 includes two driving rods 120 and two guiding rods. In this way, the feeding seats run reliably and smoothly.

[0090] In the above embodiments, as Figure 1 shown, the continuous feeding device may further include a driving device 200, and the driving device 200 is power-coupled to the driving rod 120 and / or the guiding rod. In this way, the driving device 200 can drive the driving rod 120 and / or the guiding rod to rotate, thereby driving the two feeding seats 110 to move. Thus, the present application can adopt a single driving device 200, for example, a single motor drives the two feeding seats to move, realizing alternating feeding. The thrust magnitude is constant and there will be no sudden change, ensuring the stability of the deposition parameters during friction stir deposition manufacturing.

[0091] In one of the embodiments, the output end of the driving device 200 is located on the side of the second feeding mechanism 100b away from the first feeding mechanism 100a, and multiple driving rods 120 are all power-coupled to the driving device 200.

[0092] In one of the embodiments, the continuous feeding device further includes a driving gear 210 and multiple transmission gears 220. The driving gear 210 is power-coupled to the output end of the driving device 200, and the transmission gear 220 meshes with the driving gear 210. The multiple transmission gears 220 are arranged in one-to-one correspondence with the multiple driving rods 120. In a specific embodiment, the multiple driving rods 120 may extend to the corresponding transmission gears 220 and be fixedly connected to the transmission gears 220. In this way, the above arrangement can drive multiple driving rods 120 to rotate by setting a single driving device 200.

[0093] The driving gear 210 may include an engaging portion and a pulley portion. The engaging portion and the pulley portion are coaxial and fixedly connected. The engaging portion meshes with the transmission gear 220, and the pulley portion is power-coupled to the driving device 200 through a transmission belt.

[0094] In one embodiment, the continuous feeding device further includes a frame 1. An accommodation space is formed inside the frame 1. The feeding mechanism 100 is installed in the accommodation space. The driving device 200 is installed outside the frame 1, and the driving gear 210 and the transmission gear 220 are installed on the frame 1 and located outside the accommodation space.

[0095] In one embodiment, the frame 1 further includes a partition 2. The partition 2 is located inside the accommodation space and is between two adjacent feeding mechanisms 100.

[0096] In one embodiment, the feeding mechanism 100 may further include a lower limit detection element 130 and an upper limit detection element 140. The upper limit detection element 140 and the lower limit detection element 130 are arranged on the frame 1 at intervals along the feeding direction. The lower limit detection element 130 is used to detect whether the feeding seat 110 is located at the first end 121a, and the upper limit detection element 140 is used to detect whether the feeding seat 110 is located at the second end 121b. When the lower limit detection element 130 detects that the feeding seat 110 is located at the first end 121a, the clamping member 111 can be controlled to release the bar stock 9. When the upper limit detection element 140 detects that the feeding seat 110 is located at the second end 121b, the clamping member 111 can be controlled to clamp the bar stock 9.

[0097] In this way, when the lower limit detection element 130 of the first feeding mechanism 100a detects that the feeding seat 110 of the first feeding mechanism 100a moves to the first end 121a, the clamping member 111 of the first feeding mechanism 100a can be controlled to release the bar stock 9, and then the driving rod 120 of the first feeding mechanism 100a continuously rotates to drive the feeding seat 110 of the first feeding mechanism 100a to move towards the second end 121b. When the feeding seat 110 of the first feeding mechanism 100a is located at the first end 121a, the feeding seat 110 of the second feeding mechanism 100b is located at the second end 121b. When the upper limit detection element 140 of the second feeding mechanism 100b detects that the feeding seat 110 of the second feeding mechanism 100b is located at the second end 121b, the clamping member 111 of the second feeding mechanism 100b is controlled to clamp the bar stock 9, and then the driving rod 120 of the second feeding mechanism 100b continuously rotates to drive the feeding seat 110 of the second feeding mechanism 100b to move towards the first end 121a.

[0098] Similarly, when the lower limit detection element 130 of the second feeding mechanism 100b detects that the feeding seat 110 of the second feeding mechanism 100b is at the first end 121a, the clamping member 111 of the second feeding mechanism 100b is controlled to release the bar stock 9, and then the driving rod 120 of the second feeding mechanism 100b continuously rotates to drive the feeding seat 110 of the second feeding mechanism 100b to move towards the second end 121b. When the feeding seat 110 of the second feeding mechanism 100b is at the first end 121a, the feeding seat 110 of the first feeding mechanism 100a is at the second end 121b. When the upper limit detection element 140 of the first feeding mechanism 100a detects that the feeding seat 110 of the first feeding mechanism 100a is at the second end 121b, the clamping member 111 of the first feeding mechanism 100a is controlled to clamp the bar stock 9, and then the driving rod 120 of the first feeding mechanism 100a continuously rotates to drive the feeding seat 110 of the first feeding mechanism 100a to move towards the first end 121a. In this way, one of the clamping members 111 of the first feeding mechanism 100a and the clamping member 111 of the second feeding mechanism 100b will clamp the bar stock 9, and then an alternating continuous feeding is achieved.

[0099] In one embodiment, when the lower limit detection element 130 of the first feeding mechanism 100a detects that the feeding seat 110 of the first feeding mechanism 100a has moved to the first end 121a, and the upper limit detection element 140 of the second feeding mechanism 100b detects that the feeding seat 110 of the second feeding mechanism 100b has moved to the second end 121b, the clamping member 111 of the second feeding mechanism 100b can be controlled to clamp the bar stock 9 first, and then the clamping member 111 of the first feeding mechanism 100a is controlled to release the bar stock 9. In this way, the bar stock 9 can be kept in a clamped state all the time, ensuring a stable thrust on the bar stock 9, which is beneficial to improving the consistency and performance stability of the deposited material.

[0100] Similarly, when the lower limit detection element 130 of the second feeding mechanism 100b detects that the feeding seat 110 of the second feeding mechanism 100b is at the first end 121a, and the upper limit detection element 140 of the first feeding mechanism 100a detects that the feeding seat 110 of the first feeding mechanism 100a is at the second end 121b, the clamping member 111 of the first feeding mechanism 100a can be controlled to clamp the bar stock 9 first, and then the clamping member 111 of the second feeding mechanism 100b is controlled to release the bar stock 9. In this way, the bar stock 9 can be kept in a clamped state all the time.

[0101] In one embodiment, as Figure 1 and Figure 4As shown, the feeding mechanism 100 further includes a lower origin detection element 150 and an upper origin detection element 160. The lower limit detection element 130, the lower origin detection element 150, the upper origin detection element 160, and the upper limit detection element 140 are arranged at intervals in the direction opposite to the feeding direction.

[0102] The lower origin detection element 150 is used to detect whether the feeding seat 110 is at the lower origin position, and the upper origin detection element 160 is used to detect whether the feeding seat 110 is at the upper origin position. The distance between the feeding seat 110 at the lower origin position and the first end 121a of the driving rod 120 of the feeding seat 110 is d1, and the distance between the feeding seat 110 at the upper origin position and the second end 121b of the driving rod 120 of the feeding seat 110 is d2, where d1 = d2. In the initial state, the feeding seat 110 of the first feeding mechanism 100a can be at the lower origin position and the feeding seat 110 of the second feeding mechanism 100b is at the upper origin position. Or, in the initial state, the feeding seat 110 of the first feeding mechanism 100a can be at the upper origin position and the feeding seat 110 of the second feeding mechanism 100b is at the lower origin position. In this way, it can be ensured that when the continuous feeding device is running, when the feeding seat 110 of the first feeding mechanism 100a moves to the first end 121a of the threaded section of the driving rod 120 of the first feeding mechanism 100a, the feeding seat 110 of the second feeding mechanism 100b is at the second end 121b of the threaded section of the driving rod 120 of the second feeding mechanism 100b. Or, when the feeding seat 110 of the first feeding mechanism 100a moves to the second end 121b of the threaded section of the driving rod 120 of the first feeding mechanism 100a, the feeding seat 110 of the second feeding mechanism 100b is at the first end 121a of the threaded section of the driving rod 120 of the second feeding mechanism 100b.

[0103] In one of the embodiments, when the continuous feeding device is running, if the lower origin detection element 150 of the first feeding mechanism 100a and the upper origin detection element 160 of the second feeding mechanism 100b do not simultaneously detect that the feeding seat 110 of the first feeding mechanism 100a is at the lower origin position and the feeding seat 110 of the second feeding mechanism 100b is at the upper origin position, a warning is issued. Or, if the upper origin detection element 160 of the first feeding mechanism 100a and the lower origin detection element 150 of the second feeding mechanism 100b do not simultaneously detect that the feeding seat 110 of the first feeding mechanism 100a is at the upper origin position and the feeding seat 110 of the second feeding mechanism 100b is at the lower origin position, a warning is issued. After receiving the warning, maintenance is required to avoid abnormalities during commutation.

[0104] In one of the embodiments, the present application further provides a friction stir additive manufacturing device with continuous feeding. The friction stir additive manufacturing device with continuous feeding includes the above-mentioned 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 a bar stock 9. The feeding port of the stirring head accommodation space is directly opposite to the feeding ports of the feeding seats 110 of a plurality of feeding mechanisms 100. The continuous feeding device continuously supplies materials to the stirring head 11, thereby realizing continuous friction stir deposition manufacturing.

[0105] The following will specifically elaborate on the peristaltic feeding scheme, that is, Embodiment 2.

[0106] In order to distinguish from the above-mentioned alternative feeding scheme, the present application has changed the corresponding numbers.

[0107] Specifically, as Figures 5 - 8 shown. Similar to Embodiment 1, the feeding device includes a plurality of feeding mechanisms 300 arranged at intervals in the vertical direction. The feeding mechanism 300 includes a feeding seat 310 and a driving rod 320. The driving rod 320 is used to drive the feeding seat 310 to move along the feeding direction on the driving rod 320. For example, the vertical downward direction is the feeding direction. The movement path of the feeding seat 310 at least includes a first preset position and a second preset position. The second preset position and the first preset position are arranged at intervals along the feeding direction. The feeding seat 310 is provided with a clamping member, and the clamping member can have a clamping state for clamping the bar stock and a releasing state for releasing the bar stock. The plurality of feeding mechanisms 300 at least include a first feeding mechanism 300a and a second feeding mechanism 300b. As Figure 6 shown, the first preset position can be the downward stroke position, and the second preset position can be the upward stroke position. After the clamping member of the first feeding mechanism 300a clamps the bar stock, the feeding seat 310 of the first feeding mechanism 300a is driven to move along the feeding direction, thereby driving the bar stock to move along the feeding direction. When the feeding seat 310 of the first feeding mechanism 300a moves to the first preset position (downward stroke position), the clamping member of the second feeding mechanism 300b is still in the state of clamping the bar stock. In this way, the feeding seat 310 of the second feeding mechanism 300b can be continuously driven to move along the feeding direction, thereby driving the bar stock to continue to move along the feeding direction. In this way, the bar stock can be conveyed to the stirring head 11, thereby realizing continuous deposition manufacturing.

[0108] As Figure 5As shown, different from Embodiment 1, in the peristaltic feeding, while the driving rod 320 is rotating, at least one of the feeding seats 310 of the first feeding mechanism 300a and the feeding seat 310 of the second feeding mechanism 300b is driven to move in the feeding direction. When any one of the feeding seats 310 of the first feeding mechanism 300a and the feeding seat 310 of the second feeding mechanism 300b moves to the lower stroke position, a driving component is also used to drive the corresponding feeding seat to move in the direction opposite to the feeding direction. It can be understood that, for example, while the driving rod 320 is rotating, the feeding seats 310 of the first feeding mechanism 300a and the second feeding mechanism 300b are driven to move in the feeding direction simultaneously. When the feeding seat 310 of the first feeding mechanism 300a moves to the lower stroke position, a driving component, such as a cylinder, is used to drive the feeding seat 310 of the first feeding mechanism 300a to move in the direction opposite to the feeding direction. Similarly, when the feeding seat 310 of the second feeding mechanism 300b moves to the lower stroke position, a driving component is used to drive the feeding seat 310 of the second feeding mechanism 300b to move in the direction opposite to the feeding direction, thus realizing peristaltic feeding.

[0109] In one of the embodiments, different from Embodiment 1, at least a part of the driving rod 320 is a lead screw, and the feeding seat 310 is in threaded cooperation with the lead screw. As Figure 6 shown, when the feeding seat 310 of the first feeding mechanism 300a moves to the first preset position (lower stroke position), for example, the feeding seat 310 of the first feeding mechanism 300a can also be driven to move to the second preset position (upper stroke position) by a driving component. For example, the feeding mechanism 300 is further provided with a clutch member 330. The clutch member 330 at least has a state of tightly fitting and loosening and separating from the driving rod 320. 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 the clutch member 330 loosens and separates from the driving rod 320, the clutch member 330 is sleeved on the driving rod 320 loosely. Thus, when the feeding seat 310 of the first feeding mechanism 300a moves to the first preset position (lower stroke position), the corresponding clamping member is controlled to loosen the bar stock, and the corresponding clutch member 330 is loosened and separated, and then the feeding seat 310 is quickly driven to move to the second preset position (upper stroke position) by a driving component such as a cylinder. In this way, the clamping members of the first feeding mechanism 300a and the second feeding mechanism 300b can jointly clamp the bar stock and move along the feeding direction.

[0110] Further, when the feeding seat 310 of the second feeding mechanism 300b moves to the first preset position (lower stroke position), the corresponding clamping member is controlled to loosen the bar stock, and the corresponding clutch member 330 is loosened and separated, and then the feeding seat 310 is quickly driven to move to the second preset position (upper stroke position) by a driving component such as a cylinder. Such a cycle can realize continuous feeding.

[0111] In one of the embodiments, when the feeding seat 310 of the second feeding mechanism 300b and the feeding seat 310 of the first feeding mechanism 300a move to the first preset position simultaneously, it is necessary to control one of the feeding seats to quickly move to the second preset position. For example, quickly drive the feeding seat 310 of the second feeding mechanism 300b to move to the second preset position, and then control the clamping member of the second feeding mechanism 300b to clamp the bar stock. Among them, after the clamping member of the second feeding mechanism 300b clamps the bar stock, then control the clamping member of the first feeding mechanism 300a to release the bar stock. In this way, the continuous pressure of the bar stock on the substrate is ensured.

[0112] Alternatively, quickly drive the feeding seat 310 of the first feeding mechanism 300a to move to the second preset position, and then control the clamping member of the first feeding mechanism 300a to clamp the bar stock. Among them, after the clamping member of the first feeding mechanism 300a clamps the bar stock, then control the clamping member of the second feeding mechanism 300b to release the bar stock, so as to ensure the continuous pressure of the bar stock on the substrate.

[0113] In one of the embodiments, the feeding seat 310 of the first feeding mechanism 300a is arranged close to the first preset position, and the feeding seat 310 of the second feeding mechanism 300b is arranged close to the second preset position. In this way, the distance between the feeding seat 310 of the first feeding mechanism 300a and the feeding seat 310 of the second feeding mechanism 300b is relatively large, and 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 move to the first preset position simultaneously.

[0114] In one of the embodiments, the feeding seat 310 also has a lower limit position in the moving path of the threaded section, and the second preset position, the first preset position and the lower limit position are arranged at intervals along the feeding direction; when the feeding seat 310 of the first feeding mechanism 300a and / or the feeding seat 310 of the second feeding mechanism 300b moves to the lower limit position, an abnormal alarm is issued. Usually, when the feeding seat 310 moves to the first preset position, the driving component such as a cylinder will drive the feeding seat 310 to move to the second preset position, so that the feeding seat 310 of the first feeding mechanism 300a and / or the feeding seat 310 of the second feeding mechanism 300b will not move to the lower limit position. When the above situation occurs, it is necessary to repair the feeding device, such as checking whether the corresponding detection element fails, etc.

[0115] As Figures 5 - 8 shown, the specific structure of the feeding device in which at least part of the driving rod 320 is a lead screw is described in detail below.

[0116] As Figure 5As shown in the figure, 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 base 310 and a driving rod 320. A clutch member 330 is provided on each of the plurality of feeding bases 310. The clutch member 330 has a first state of tightly fitting with the driving rod 320 and a second state of loosening and 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 base 310 to move in the feeding direction. When in the second state, that is, when the clutch member 330 loosens and separates from the driving rod 320, the clutch member 330 is sleeved on the driving rod 320 loosely.

[0117] As Figure 5 and Figure 6 shown in the figure, a feeding port 311 and a clamping member are further provided on each of the plurality of feeding bases 310. The clamping member is installed on the feeding base 310 and is adapted to clamp the additive rod. The feeding ports 311 of the feeding bases 310 of the plurality of feeding mechanisms 300 are facing each other. The feeding ports 311 of the feeding bases 310 of the plurality of feeding mechanisms 300 being facing each other can enable the rod to move from one feeding base 310 to another feeding base 310 in the feeding direction. The clamping member can have a state of clamping the rod and a state of loosening the rod.

[0118] 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 member does not clamp the rod, the driving assembly is used to drive the feeding base 310 to move in the direction opposite to the feeding direction.

[0119] Among them, the plurality of feeding mechanisms 300 at least include a first feeding mechanism 300a and a second feeding mechanism 300b. As Figure 5 shown in the figure, in one of the embodiments, the second feeding mechanism 300b and the first feeding mechanism 300a are arranged at intervals in the feeding direction. In another embodiment, the second feeding mechanism 300b and the first feeding mechanism 300a are arranged at intervals in 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 in the feeding direction, that is, the second feeding mechanism 300b is located above the first feeding mechanism 300a.

[0120] As Figures 5 - 8As 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 component drives the feeding seat of the first feeding mechanism 300a to move towards the upper stroke position 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 component drives the feeding seat of the second feeding mechanism 300b to move towards the upper stroke position along the direction opposite to the feeding direction. The upper stroke position and the lower stroke position are arranged at intervals along the feeding direction.

[0121] 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 performed 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. Also, for 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 member 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 6 shown, when the feeding seat 310 is in the lower stroke position, the clutch member 330 can be in a state of being separated 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.

[0122] 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 in 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 is tightly clamped and matched with the driving rod 320 of the second feeding mechanism 300b, and the clamping member of the second feeding mechanism 300b clamps the bar stock. 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 made to move along the feeding direction.

[0123] When the feeding seat 310 of the first feeding mechanism 300a moves to the lower stroke position, the driving assembly can be used to drive the feeding seat 310 toward the upper stroke position. During the upward movement, the clamping piece of the first feeding mechanism 300a is in a state of loosening the rod. When the feeding seat 310 of the first feeding mechanism 300a moves to the upper stroke position, or between the upper stroke position and the lower stroke position, the clamping piece of the first feeding mechanism 300a is controlled to clamp the rod, and then together with the clamping piece of the second feeding mechanism 300b, the rod is clamped and moved along the feeding direction to realize the transportation of the rod.

[0124] like Figure 7 As shown, when the feeding seat 310 of the second feeding mechanism 300b moves to the lower stroke position, the clamping member of the second feeding mechanism 300b can be controlled to release the rod material, and then the driving assembly is used to drive the feeding seat 310 of the second feeding mechanism 300b to move to the upper stroke position, or between the upper stroke position and the lower stroke position, and then the clamping member of the second feeding mechanism 300b is controlled to clamp the rod material and jointly clamp the rod material with the clamping member of the first feeding mechanism 300a and move along the feeding direction to realize the transportation of the rod material.

[0125] In this way, the present application drives the feeding seat 310 to move toward the lower stroke position through the driving rod 320. When the feeding seat 310 moves to the lower stroke position, the clutch 330 can be emptied on the driving rod 320, and then the feeding seat 310 is driven by the driving assembly to quickly move toward the upper stroke position in the direction opposite to the feeding direction. When the feeding seat 310 moves to the upper stroke position, or between the upper stroke position and the lower stroke position, the clutch 330 can be tightly clamped and tightly matched with the driving rod 320, and then the driving rod 320 The feeding seat 310 is driven to move along the feeding direction. Furthermore, a first feeding mechanism 300a and a second feeding mechanism 300b are provided, so that when necessary, the clutch 330 of the first feeding mechanism 300a and / or the clutch 330 of the second feeding mechanism 300b are controlled to tightly cooperate with the driving rod 320, and when necessary, the clutch 330 of the first feeding mechanism 300a or the clutch 330 of the second feeding mechanism 300b are controlled to separate from the driving rod 320, and this cycle is repeated to achieve continuous feeding.

[0126] In one embodiment, if Figure 5 As shown, the continuous feeding device also includes a material guide 12 and an auxiliary pressure rod 13. The material guide 12 has a material guide channel, and the material guide channel is directly opposite to the feeding port of the feeding seat 310. In the above-mentioned continuous rod feeding process, when a rod shortage signal appears, the rod 9 can fall into the material guide channel, and then the auxiliary pressure rod 13 presses the newly fallen rod 9, so that there is no gap between the upper and lower rods 9, so as to realize the continuous rod feeding function. It is worth noting that the above scheme can also be implemented in Example 1, which will not be repeated here.

[0127] 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 tightly fits and mates with the threaded section of the driving rod 320. In the second state, the clutch member 330 is disengaged and separated 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.

[0128] 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.

[0129] In another embodiment, as Figure 5 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 seats 310 of both the first feeding mechanism 300a and the second feeding mechanism 300b to move simultaneously. In this way, on the basis of being able to achieve continuous feeding, the 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 changes will not occur.

[0130] In a specific example, as Figure 5 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.

[0131] In one embodiment, as Figure 5 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. The driving rod assembly includes a plurality of pieces, and all the driving rod assemblies are power-coupled to the output end 410 of the driving motor. Thus, by setting one driving motor, the rotation of a plurality of driving rod assemblies can be driven simultaneously, and then the first feeding mechanism 300a and the second feeding mechanism 300b can be driven to work. Compared with setting two driving motors to drive the first feeding mechanism 300a and the second feeding mechanism 300b to work respectively, the driving force output by one driving motor is relatively stable and easy to control, avoiding the phenomenon of out-of-synchronization of the two driving motors. 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 changes will not occur.

[0132] In one embodiment, asFigure 5 As shown, the continuous feeding device 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 rod assemblies. For example, the plurality of driving rod assemblies 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, one driving motor is set to drive the plurality of driving rod assemblies to rotate simultaneously.

[0133] In one embodiment, the driving wheel 411 includes a belt pulley portion. The belt pulley portion is power-coupled to the plurality of transmission wheels 412 through a transmission belt. In this way, the transmission is simple and reliable, which is beneficial to avoiding the conveying of the bar stock.

[0134] 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. The plurality of transmission wheels 412 are also gears, and the gear transmission is stable and reliable.

[0135] In one embodiment, as Figure 5 shown, it further includes a machine base 400. The plurality of feeding seats 310 are movably arranged vertically on the machine base 400. In this way, when the feeding seat 310 moves to the lower stroke position, in the state where the clamping member does not clamp the bar stock, the feeding seat 310 can be moved to the upper stroke position, and then the clamping member clamps the bar stock to achieve continuous feeding.

[0136] There are various ways to drive the feeding seat 310 to move on the machine base 400. In one embodiment, the feeding device further includes a mutually cooperating guide rail 340 and a guide sliding seat 350. 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, the screw-nut transmission can also be adopted to drive the feeding seat 310 to move on the machine base 400.

[0137] In one embodiment, the driving assembly includes a driving member 360. The driving member 360 includes a driving seat and a movable rod. The movable rod and the driving seat are relatively movable. For example, the driving member 360 can be a cylinder. When the movable rod is fixed, the driving seat can move relative to the movable rod. When the driving seat is fixed, the movable rod can move relative to the driving seat. Also for example, the driving member 360 can be a mechanism similar to a screw-nut. Its driving source can be a motor. The motor is arranged in the driving seat. The motor drives the nut to rotate. When the driving seat is fixed, the movable rod can move relative to the driving seat and the nut. When the movable rod is fixed, the driving seat and the nut can move relative to the movable rod.

[0138] In a specific embodiment, the driving member 360 is taken as an air cylinder for example. The driving seat is connected to one of the two feeding seats 310, and the movable rod is connected to the other of the two feeding seats 310. For example, the driving seat is installed on the feeding seat 310 of the first feeding mechanism 300a, and the output end of the movable rod is installed on the feeding seat 310 of the second feeding mechanism 300b. Or, the driving seat is installed on the feeding seat 310 of the second feeding mechanism 300b, and the output end of the movable rod is installed on the feeding seat 310 of the first feeding mechanism 300a. In a specific embodiment, for example, the driving seat is installed on the feeding seat 310 of the first feeding mechanism 300a, and the output end of the movable 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 loosely. At this time, since the feeding seat 310 of the first feeding mechanism 300a is in a cooperating state with the driving rod 320, the driving seat is relatively fixed, and the feeding seat 310 of the second feeding mechanism 300b can be driven by the movable 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 loosely. At this time, since the feeding seat 310 of the second feeding mechanism 300b is in a cooperating state with the driving rod 320, the movable rod is relatively fixed, so that the driving seat can be driven to move by the movable rod, and then the feeding seat 310 of the first feeding mechanism 300b can be driven to move upward to the upper stroke position.

[0139] In one embodiment, as Figure 5 shown, the feeding mechanism 300 further includes a lower stroke position detecting element 370, and the lower stroke position detecting element 370 is arranged on the machine base 400. The lower stroke position detecting element 370 is used for detecting whether the feeding seat 310 is located at the lower stroke position. When the feeding seat 310 is located at the lower stroke position, the corresponding clamping member can be controlled to loosen and the clutch member 330 to loosen and separate.

[0140] In one embodiment, the feeding mechanism 300 further includes a lower limit position detecting element 380, and the lower limit position detecting element 380 is arranged on the machine base 400. The lower limit position detecting element 380 is used for detecting whether the feeding seat 310 is located at the lower limit position. Generally, when the lower stroke position detecting element 370 detects that the feeding seat 310 is located at the lower stroke position, the corresponding clamping member is controlled to loosen and the clutch member to loosen and separate, 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 detecting element 380 detects that the feeding seat 310 is located at the lower limit position, the machine needs to be stopped for maintenance, and the lower limit position detecting element 380 plays a protective role.

[0141] In one embodiment, asFigure 8 As 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.

[0142] 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 control the clamping member of the second feeding mechanism 300b to clamp the bar stock 9, and the clutch member 330 of the second feeding mechanism 300b to hold tightly. Then, control the clamping member 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 310 of the first feeding mechanism 300a. That is, during the process of controlling the feeding seat 310 of the second feeding mechanism 300b to move towards the upper stroke position, the feeding seat 310 of the first feeding mechanism 300a can continue to move towards the lower limit position. When the clamping member of the second feeding mechanism 300b clamps the bar stock and the clutch member 330 of the second feeding mechanism 300b holds tightly, control the clamping member of the first feeding mechanism 300a to release the bar stock and the clutch member 330 of the first feeding mechanism 300a to release and separate, and then drive the feeding seat of the first feeding mechanism 300a to move towards the upper stroke position.

[0143] In a specific embodiment, the clutch member 330 can be a product made of existing technologies, such as a clutch, a shaft clamp, etc. Through the holding and releasing of the clutch and the shaft clamp, the transmission cooperation and release separation of the nut and the lead screw are realized.

[0144] The present application also proposes a friction stir additive manufacturing device with continuous feeding. As Figure 5 shown, the friction stir additive manufacturing device with continuous feeding includes the above-mentioned 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. The feeding port of the stirring head accommodation space is directly opposite to the feeding ports of the feeding seats 310 of the plurality of feeding mechanisms 300. The continuous feeding device continuously supplies materials to the stirring head 11, thus realizing continuous friction stir deposition manufacturing.

[0145] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0146] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, 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, materials, or characteristics described may 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.

[0147] 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 control method for a continuous feeding device for stir friction additive, characterized in that: The feeding device comprises a plurality of feeding mechanisms arranged at intervals along the vertical direction, the feeding mechanisms comprising a feeding seat and a driving rod, the driving rod is used to drive the feeding seat to move on the driving rod along the feeding direction, the moving path of the feeding seat comprises at least a first preset position and a second preset position, the second preset position and the first preset position are arranged at intervals along the feeding direction; the feeding seat is provided with a clamping member, the clamping member is suitable for clamping the bar material; the plurality of feeding mechanisms comprises a first feeding mechanism and a second feeding mechanism; The steps include: S10: Controlling the clamping member of the first feeding mechanism to clamp the bar material; S20: driving the feeding seat of the first feeding mechanism to move along the feeding direction; S30: when the feeding seat of the first feeding mechanism moves to the first preset position, the clamping member of the first feeding mechanism is controlled to release the bar material; and when the feeding seat of the first feeding mechanism moves to the first preset position, the clamping member of the second feeding mechanism is in a state of clamping the bar material; S40: driving the feeding seat of the second feeding mechanism to move along the feeding direction, and driving the feeding seat of the first feeding mechanism to move toward the second preset position; S50: when the feeding seat of the second feeding mechanism moves to the first preset position, the clamping member of the second feeding mechanism is controlled to release the bar material; and when the feeding seat of the second feeding mechanism moves to the first preset position, the clamping member of the first feeding mechanism is in a state of clamping the bar material; S60: driving the feeding seat of the second feeding mechanism to move toward the second preset position.

2. The method according to claim 1, characterized in that The feeding device further comprises a driving motor, and the driving rod of the first feeding mechanism and the driving rod of the second feeding mechanism are both power-coupled and connected to the driving motor; During the operation of the continuous feeding device, the driving motor rotates continuously to drive the driving rod of the first feeding mechanism and the driving rod of the second feeding mechanism to rotate continuously clockwise or continuously counterclockwise at the same time.

3. The method according to claim 2, characterized in that During the rotation of the driving rod, one of the feeding seats of the first feeding mechanism and the second feeding mechanism is driven to move in the feeding direction, and the other of the feeding seats of the first feeding mechanism and the second feeding mechanism is driven to move in the direction opposite to the feeding direction.

4. The method according to claim 2, characterized in that: During the rotation of the driving rod, at least one of the feeding seats of the first feeding mechanism and the second feeding mechanism is driven to move in the feeding direction. When any one of the feeding seats of the first feeding mechanism and the second feeding mechanism moves to the first preset position, the driving component is also used to drive the corresponding feeding seat to move in the direction opposite to the feeding direction.

5. The method according to claim 3, characterized in that: At least part of the driving rod is a reciprocating screw rod, and the feeding seat is threadably matched with the reciprocating screw rod; In step S30, when the feeding seat of the first feeding mechanism moves to the first preset position, the feeding seat of the second feeding mechanism is located at the second preset position; In step S50, when the feeding seat of the second feeding mechanism moves to the first preset position, the feeding seat of the first feeding mechanism is located at the second preset position.

6. The method according to claim 5, characterized in that In step S30, the clamping member of the second feeding mechanism is first controlled to clamp the bar material, and then the clamping member of the first feeding mechanism is controlled to release the bar material; In step S50, the clamping member of the first feeding mechanism is first controlled to clamp the bar material, and then the clamping member of the second feeding mechanism is controlled to release the bar material.

7. The method according to claim 6, characterized in that The feeding seat further includes a lower origin position and an upper origin position in the moving path of the reciprocating screw rod, and the second preset position, the upper origin position, the lower origin position and the first preset position are arranged at intervals along the feeding direction; The distance between the lower origin position and the first preset position is d1, and the distance between the upper origin position and the second preset position is d2, d1=d2; Before step S10, the feeding seat of the first feeding mechanism is located at the upper origin position, and the feeding seat of the second feeding mechanism is located at the lower origin position, or the feeding seat of the first feeding mechanism is located at the lower origin position, and the feeding seat of the second feeding mechanism is located at the upper origin position.

8. The method according to claim 7, characterized in that It is also detected whether the feeding seat of the first feeding mechanism and the feeding seat of the second feeding mechanism are respectively located at the lower origin position and the upper origin position at the same time; and / or it is also detected whether the feeding seat of the first feeding mechanism and the feeding seat of the second feeding mechanism are respectively located at the upper origin position and the lower origin position at the same time; If not, an abnormal alarm is issued.

9. The method according to claim 4, characterized in that At least part of the driving rod is a lead screw, and the feeding seat is threadably matched with the lead screw; After the clamping member of the first feeding mechanism is controlled to release the bar material, the driving assembly is used to drive the feeding seat of the first feeding mechanism to move toward the second preset position; or, After the clamping member of the second feeding mechanism is controlled to release the bar material, the driving assembly is used to drive the feeding seat of the second feeding mechanism to move toward the second preset position.

10. The method according to claim 9, characterized in that When the feeding seat of the first feeding mechanism and the feeding seat of the second feeding mechanism move to the first preset position at the same time, the clamping member of the second feeding mechanism is controlled to release the bar material and move toward the second preset position; when the feeding seat of the second feeding mechanism moves to the second preset position, the clamping member of the second feeding mechanism is controlled to clamp the bar material, and then the clamping member of the first feeding mechanism is controlled to release the bar material; or, When the feeding seat of the first feeding mechanism and the feeding seat of the second feeding mechanism move to the first preset position at the same time, the clamping member of the first feeding mechanism is controlled to release the bar material and move toward the second preset position. When the feeding seat of the first feeding mechanism moves to the second preset position, the clamping member of the first feeding mechanism is controlled to clamp the bar material, and then the clamping member of the second feeding mechanism is controlled to release the bar material.

11. The method according to claim 9, characterized in that The feeding seat also has a lower limit position in the moving path of the lead screw, and the second preset position, the first preset position and the lower limit position are arranged at intervals along the feeding direction; When the feeding seat of the first feeding mechanism and / or the feeding seat of the second feeding mechanism moves to the lower limit position, an abnormal alarm is issued.

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