Chuck for friction stir additive equipment and equipment with chuck

Abstract

The utility model relates to the technical field of friction-stir additive equipment, in particular to a chuck for friction-stir additive equipment and equipment with the chuck, which comprises a mounting plate, a clamping plate and a clamping plate. A through hole is formed in the mounting plate, the shell is rotatably mounted on the mounting plate, the axis of the shell coincides with the axis of the through hole, a medium cavity and a through hole penetrating through the shell along the axis of the shell are formed in the shell, and the axis of the through hole coincides with the axis of the through hole. The hydraulic chuck device not only can ensure that a bar is clamped under hydraulic pushing, but also cannot slip under the condition of providing an upsetting force required in stirring friction deposition manufacturing, and simultaneously rotates along with the bar in any process of clamping and loosening, so that the problem that a pneumatic chuck cannot bear huge radial force in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of friction stir additive manufacturing equipment technology, specifically to a chuck for friction stir additive manufacturing equipment and an equipment having the same. Background Technology

[0002] Most commercially available pneumatic chucks for lathes are designed for clamping round bars and cannot withstand large radial forces. However, continuous feed friction stir deposition manufacturing typically involves square or milled flat bars, necessitating the design of a specialized chuck capable of providing significant clamping force while remaining stable under substantial radial forces. During peristaltic feeding, the square bar rotates and moves axially, requiring this specialized chuck to clamp and release under these conditions. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a chuck for friction stir additive manufacturing equipment and an equipment having the same, thus solving the problem that pneumatic chucks in the prior art cannot withstand huge radial forces.

[0004] To achieve the above objectives, this utility model provides a chuck, comprising:

[0005] Mounting plate, the mounting plate having through holes for the bar to pass through;

[0006] A housing rotatably mounted on the mounting plate, the axis of the housing coinciding with the axis of the through hole, a medium cavity formed inside the housing and a through hole penetrating the housing along the axis of the housing, the axis of the through hole coinciding with the axis of the through hole;

[0007] A piston, a drive member, and a clamping member are provided, wherein the piston is slidably mounted in the medium cavity, and the piston includes a drive section adapted to drive the drive member to move, the drive member being adapted to drive the clamping member to move.

[0008] The clamping member is slidably mounted on the housing along a first direction, and the movement direction of the driving member and the axial direction of the housing both intersect the first direction. The clamping member is suitable for clamping a bar.

[0009] In some embodiments, the drive members include a plurality of drive members slidably mounted axially on the housing, with the axis of the drive members being parallel to the axis of the housing radially. Each drive member includes a first drive surface and a second drive surface disposed at both ends along its axial direction. The first drive surface extends radially along the piston, and the drive segment extends radially outward. The first drive surface faces the drive segment and is adapted to abut against the drive segment. The plurality of drive members are evenly spaced circumferentially along the housing, and the second drive surface extends radially downward from the inside out.

[0010] In some embodiments, the clamping member includes a plurality of clamping members, each corresponding to one of the driving members. The clamping members are slidably mounted on the housing along a first direction. The movement direction of the driving members and the axial direction of the housing both intersect the first direction. The clamping member includes a first end along the axial direction close to the housing and a second end away from the axial direction of the housing. The second end is adapted to abut against the second driving surface. The end face of the first end extends along the axial direction of the housing, and the end faces of the first ends of the plurality of clamping members are adapted to extend radially into the through hole from the peripheral wall of the through hole.

[0011] In some embodiments, a mounting base is further included, which is fixedly connected to the mounting plate. The mounting base is hollow, and the housing is rotatably mounted within the mounting base.

[0012] In some embodiments, the mounting base is provided with a hydraulic inlet and a hydraulic outlet, the medium cavity is a hydraulic cavity, and the hydraulic inlet and the hydraulic outlet are connected to the hydraulic cavity.

[0013] In some embodiments, the housing includes a first housing and a second housing, the first housing being at least partially hollow and having one end open, the second housing closing the open end of the first housing to form the medium cavity, and the drive member and the clamping member being mounted on the first housing.

[0014] In some embodiments, at least a portion of the second housing opposite to the first housing extends into the through hole, and the second housing is rotatably mounted on the mounting plate.

[0015] In some embodiments, the piston includes a body segment and a drive segment, the axis of the body segment coincides with the axis of the drive segment, the drive segment extends radially outward along the body segment, and the drive segment is adapted to abut against the first drive surface, wherein the axial width of the drive segment is smaller than the axial width of the body segment.

[0016] In some embodiments, the first housing is provided with a first limiting groove facing the medium cavity, the second housing is provided with a second limiting groove facing the medium cavity, and the axial ends of the piston are respectively installed in the first limiting groove and the second limiting groove.

[0017] In some embodiments, the first shell is provided with a first through hole, the second shell is provided with a second through hole, and the piston is provided with a third through hole. The through hole, the second through hole, the third through hole, and the first through hole are connected in sequence, wherein the diameter of the through hole, the diameter of the second through hole, the diameter of the third through hole, and the diameter of the first through hole decrease in sequence.

[0018] This invention also proposes a continuous rod feeding stirring friction deposition manufacturing device, including the aforementioned chuck.

[0019] The continuous rod feeding friction stir deposition manufacturing equipment has the same advantages over the prior art as the aforementioned chuck, and will not be repeated here. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the chuck structure according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the mandrel structure according to an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the chuck and mandrel in an embodiment of the present invention.

[0024] Figure label:

[0025] 10. Chuck body; 11. Outer shell; 12. Inner shell; 121. Vertical channel; 122. Inclined channel; 123. Receiving cavity; 124. First inner shell hole; 125. Second inner shell hole; 126. First through hole; 13. Inner shell top cover; 131. Rod through hole; 14. Clamping component; 15. Driving component; 16. Piston; 161. Third through hole; 20. Mounting plate; 21. Through hole; 22. Bearing groove; 30. First bearing; 40. Second bearing; 50. Mandrel; 60. Guide ring; 70. Sealing ring; 80. Rotary seal; 90. Return spring. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The chuck for friction stir additive manufacturing equipment is used in peristaltic continuous rod feeding friction stir additive manufacturing technology. In friction stir additive manufacturing equipment, rods need to be continuously supplied to the equipment as raw materials for friction stir additive manufacturing. The chuck for friction stir additive manufacturing equipment of this utility model is used to clamp the rods during the supply process. Since the rods in friction stir additive manufacturing equipment need to rotate at high speed, and the cross-section of the rods is usually non-circular, such as square or elliptical, a large radial force is generated during clamping. Conventional clamps may suffer significant damage during clamping.

[0030] Therefore, this utility model proposes a chuck for a friction stir additive manufacturing equipment to solve this technical problem. A through hole is opened at the central axis of the chuck to serve as a main shaft channel for the rod to pass through, and a clamping member extends out of the channel to clamp the rod.

[0031] In one aspect of this utility model, reference is made below. Figure 1-3 A chuck for a friction stir additive manufacturing apparatus according to an embodiment of the present invention is described, comprising: a mounting plate 20, a housing, a piston 16, a plurality of drive members 15, and a plurality of clamping members 14. The mounting plate 20 is provided with a through hole 21 for a rod to pass through, the rod being conveyed into the through hole 21 from above and conveyed out from below.

[0032] In practical applications, the bar will rotate during the conveying process. The housing is rotatably mounted on the mounting plate 20, and the axis of the housing coincides with the axis of the through hole 21. A hydraulic chamber and a through hole extending through the housing along its axis are formed inside the housing, and the axis of the through hole coincides with the axis of the through hole 21. The piston 16 is slidably mounted in the hydraulic chamber, and the piston 16 includes a drive section extending radially outward. The drive member 15 is slidably mounted on the housing along the axial direction, and the axis of the drive member 15 is parallel to the axis of the housing along the radial direction of the housing. The drive member 15 includes a first drive surface and a second drive surface arranged at both ends along its axial direction. The first drive surface extends radially along the piston 16 and faces the drive section. The first drive surface is adapted to abut against the drive section. Multiple drive members 15 are evenly spaced along the circumference of the housing, and the second drive surface extends radially from the inside to the outside, gradually inclined downward. Multiple clamping members 14 are arranged in a one-to-one correspondence with multiple driving members 15. The clamping members 14 are slidably mounted on the housing along a first direction. The movement direction of the driving members 15 and the axial direction of the housing both intersect the first direction. The first direction is the extension direction of the channel of the clamping member 14. The clamping member 14 includes a first end along the axial direction close to the housing and a second end away from the axial direction of the housing. The second end is adapted to fit against the second driving surface. The end face of the first end extends along the axial direction of the housing, and the end faces of the first ends of the multiple clamping members 14 are adapted to extend from the peripheral wall of the through hole into the through hole along the radial direction of the through hole.

[0033] Furthermore, a mandrel 50 is provided within the main spindle channel. A fixed-length bar continuously enters from inside the mandrel 50. The cross-section of the bar is non-circular to allow it to rotate. For example, it can be a square bar, an elliptical bar, or a bar with other structures; there is no limitation in this regard. The specific shape of the clamping member 14 can be adapted to the structure of the bar; there is no limitation in this regard either.

[0034] The rod is clamped by the clamping member 14 of the friction stir additive manufacturing equipment, and the entire clamping member 14 of the friction stir additive manufacturing equipment is driven downward by an external drive. At the same time, the mandrel 50 is connected to the main shaft and rotates continuously, thereby completing the friction stir additive manufacturing process.

[0035] According to some embodiments of the present invention, the clamping member 14 has multiple clamping members, and the side wall of the mandrel 50 is provided with multiple opening slots 51 corresponding to the clamping member 14, so that the clamping member 14 passes through the opening slots 51 to clamp the bar.

[0036] According to some embodiments of the present invention, the clamping member 14 of the friction stir additive manufacturing equipment is inserted into the middle mandrel 50 through four clamping members 14 in the front, back, left and right directions. In the clamped state, it can continuously follow the rotation of the mandrel 50, ensuring that the rod inside the mandrel 50 can be effectively clamped even when the mandrel 50 is rotating continuously.

[0037] Understandably, the mounting plate 20 is connected to the overall bar feeding device. The chuck, as the clamping component of the bar feeding device, has a main shaft channel at its central axis. The through hole 21, as part of the main shaft channel, forms the top part of the main shaft channel, through which the bar is conveyed vertically downwards. When the bar is conveyed to the designated position, liquid is introduced into the upper part of the hydraulic chamber, pushing the piston 16 within the hydraulic chamber downwards. During the downward movement, the piston 16 pushes the drive component 15 downwards, thereby causing the clamping component 14 to squeeze inwards and clamp the bar. It should be noted that the bar is rotating during the conveying process. Although the chuck can rotate with the bar, reducing its radial force, a significant radial force is still applied to the clamping component 14. In this case, the orientation of the clamping component 14 can greatly reduce the impact of the radial force on the chuck and reduce wear. Since the clamping member 14 and the driving member 15 are not perpendicular, the radial force generated when the bar rotates, upon contacting the clamping member 14, imparts a radially outward force to it. Driven by this radial force, the clamping member 14 tends to move outward along its extension direction, thus converting this radial force into a force in two directions: one radially outward and the other vertically upward, which is transmitted to the driving member 15. This allows for the decomposition and reduction of the radial force caused by the bar's rotation, minimizing the overall loss and wear of the chuck.

[0038] According to some embodiments of the present invention, the chuck for the friction stir additive manufacturing equipment has a return spring 90, which contacts the clamping member 14 to reset the clamping member 14. The return spring 90 is a butterfly spring.

[0039] According to some embodiments of the present invention, the chuck further includes a mounting base, which is fixedly connected to the mounting plate 20. The mounting base is hollow, and the housing is rotatably mounted inside the mounting base. The housing includes a first housing and a second housing. At least a portion of the first housing is hollow, and one end of the first housing is open. The second housing closes the open end of the first housing to form a hydraulic cavity. The drive member 15 and the clamping member 14 are both mounted on the first housing.

[0040] Specifically, the chuck body 10 is mounted on the mounting plate 20. The mounting base is the outer shell 11, the first shell is the inner shell 12, and the second shell is the inner shell top cover 13. The inner wall of the outer shell 11 contacts the outer wall of the inner shell 12. The outer shell 11 and the inner shell 12 are connected by a second bearing 40 to allow relative rotation between them. The inner shell 12 has an internal accommodating space. The inner shell top cover 13 and the inner wall of the accommodating space cooperate to form a hydraulic chamber. The outer shell 11 has an outer shell hole for conveying liquid into the inner shell 12. The inner shell 12 has a matching inner shell hole. Liquid entering through the outer shell hole can enter the hydraulic chamber through the inner shell hole to drive the piston 16 to rise or fall. The liquid in the hydraulic chamber, together with the piston 16, constitutes the power source of the clamping member 14.

[0041] According to some embodiments of this utility model, the inner shell 12 and the outer shell 11 are guided by a guide ring 60 for rotation, and a sealing ring 70 and a rotating seal 80 are used to achieve a sealing effect.

[0042] The first housing is axially spaced from the mounting plate 20, and the second housing includes a mounting flange. At least a portion of the second housing extends into the hydraulic chamber, and the mounting flange abuts against the end of the first housing facing the mounting plate 20.

[0043] According to some embodiments of this utility model, the first shell is an inner shell 12, and the second shell is an inner shell top cover 13. The inner shell top cover 13 is fixedly connected to the inner shell 12, and the two rotate synchronously. The inner shell top cover 13 is connected to the mounting plate 20 through a first bearing 30. Specifically, a bearing groove 22 is provided in the through hole 21 of the mounting plate 20, and the first bearing 30 is disposed in the bearing groove 22. The inner shell top cover 13 includes two parts: a cylindrical structure and a disc structure. The cylindrical structure is accommodated in the through hole 21, and the disc structure is fixed to the bottom of the cylindrical structure (or is an integral structure) and cooperates with the top of the inner shell 12 to form an accommodating space. A rod through hole 131 is opened on the central shaft of the cylindrical part, and the rod through hole 131 constitutes part of the main shaft channel. The disc structure does not contact the bottom surface of the mounting plate 20 and leaves a gap. The disc structure is connected to the top of the inner shell 12.

[0044] Specifically, the inner shell top cover 13 is movably connected to the mounting plate 20 via a first bearing 30, the inner shell 12 is movably connected to the outer shell 11 via a second bearing 40, the inner shell top cover 13 is fixedly connected to the inner shell 12, and the outer shell 11 is fixedly connected to the mounting plate 20. Thus, when the bar rotates, the inner shell 12 and the inner shell top cover 13 rotate with the bar, while the outer shell 11 remains fixed and does not rotate with the bar.

[0045] According to some embodiments of this utility model, the driving member 15 is disposed within the receiving cavity 123, which includes a vertical channel 121 and an inclined channel 122. The top end of the vertical channel 121 communicates with the receiving space. The driving member 15 is disposed within the vertical channel 121, which limits the driving member 15 to only move vertically. The top of the driving member 15 is adapted to rise into the receiving space. The inclined channel 122 is not horizontal and communicates with the vertical channel 121. The end of the inclined channel 122 near the main shaft channel is lower in height, while the end near the vertical channel 121 is higher. The clamping member 14 is disposed inside the inclined channel 122, which limits the clamping member 14 to move only along the extension direction of the inclined channel 122.

[0046] Therefore, when the clamping member 14 is subjected to the radial force of the rotating bar, it tends to retract. This process transmits the radial force along the inclined channel 122 until it is transmitted to the driving member 15. Because the inclined channel 122 is not horizontal but at a certain angle, when the bar transmits the radial force to the clamping member 14, the force extending outward in the horizontal radial direction is converted into a force extending along the inclined channel 122. Thus, a portion of the completely horizontal force is converted into a force that drives the clamping member 14 to move vertically or has a tendency to move vertically, thereby converting part of the radial force.

[0047] However, the force extending along the inclined channel 122 can be decomposed into forces in two directions: a vertical force and a horizontal force. Therefore, due to the angle of the inclined channel 122, a portion of the radial force is converted into a vertical force on the driving member 15, causing it to move vertically or tending to move vertically. A portion of the radial force still exists, potentially exerting pressure on the chuck. However, in this process, the pressure is reduced, and part of the radial force is eliminated, thereby minimizing the impact and damage to the chuck caused by the rotation of the bar.

[0048] According to some embodiments of the present invention, the bottom end of the driving member 15 is a second driving surface, the second driving surface is an inclined surface, and the clamping member 14 is provided with an inclined surface adapted to the second driving surface at one end near the driving member 15.

[0049] Specifically, the driving component 15 is a wedge-shaped rod, and the bottom end of the wedge-shaped rod is the second driving surface. The second driving surface is an inclined wedge-shaped surface. Multiple clamping components 14 are driven to work simultaneously by the wedge-shaped surfaces of multiple wedge-shaped rods. Four clamping components 14 are evenly spaced along the circumference. Each clamping component 14 is a wedge-shaped block. One end of the clamping component 14 near the driving component 15 is provided with an inclined surface that matches the second driving surface. This inclined surface is in direct contact with the wedge-shaped surface of the wedge-shaped rod. At the same time, the wedge-shaped block has a self-locking principle, thereby better realizing the conversion of the radial force transmission direction.

[0050] According to some embodiments of the present invention, the piston 16 includes a main body section and a drive section. The axis of the main body section coincides with the axis of the drive section. The drive section extends outward along the radial direction of the main body section and is adapted to abut against a first drive surface. The axial width of the drive section is smaller than the axial width of the main body section.

[0051] Specifically, the main body section is a cylindrical structure, and the drive section is a disc structure. The main body section and the drive section are concentrically arranged, with the drive section dividing the hydraulic chamber into two independent spaces. The drive section is located in the middle of the main body section, and the main body section has protruding parts on both the top and bottom relative to the drive section. The protruding parts of the main body section are adapted to cooperate with the main shaft channel, serving a limiting function. The lower surface of the drive section of the piston 16 is adapted to contact the first drive surface of the drive member 15, thereby controlling the movement of the drive member 15. The first housing has a first limiting groove facing the hydraulic chamber, and the second housing has a second limiting groove facing the hydraulic chamber. The axial ends of the main body section are respectively installed in the first limiting groove and the second limiting groove. Thus, the piston 16 can be limited, allowing it to move only axially.

[0052] According to some embodiments of this utility model, the mounting base is provided with a hydraulic inlet and a hydraulic outlet, which are connected to a hydraulic chamber. Liquid is adapted to enter the hydraulic chamber through the hydraulic inlet and to flow out of the hydraulic chamber through the hydraulic outlet, thereby controlling the movement of the piston 16 and providing driving force to the piston 16.

[0053] According to some embodiments of the present invention, the inner shell 12 hole includes a first inner shell hole 124 and a second inner shell hole 125. The first inner shell hole 124 is disposed above the driving section of the piston 16 and is used to introduce liquid into the upper part of the driving section of the piston 16 to drive the piston 16 to descend. The second inner shell hole 125 is disposed below the driving section of the piston 16 and is used to introduce liquid into the lower part of the driving section of the piston 16 to drive the piston 16 to rise.

[0054] In some embodiments, the first shell has a first through hole 126, the second shell has a second through hole (i.e., a rod through hole 131), and the piston 16 has a third through hole 161. The through hole 21, the second through hole, the third through hole 161, and the first through hole 126 are sequentially connected. The diameters of the through hole 21, the second through hole, the third through hole 161, and the first through hole 126 decrease sequentially. This facilitates the rod's entry into the spindle channel from above, and the progressively decreasing radius of the holes makes the rod feeding easier.

[0055] In some embodiments, the spindle channel is a through hole, which includes a first limiting hole provided on the inner shell top cover 13. The first limiting hole forms part of the through hole 21, and the main body segment is at least partially in contact with the first limiting hole to restrict the radial movement of the piston 16.

[0056] In some embodiments, the body segment extends through to form a perforation, namely a third through hole 161, which forms part of the via 21.

[0057] In some embodiments, the through hole further includes a second limiting hole disposed on the inner shell 12, the main body segment being at least partially in contact with the second limiting hole to restrict the radial movement of the piston 16, and a clamping hole being provided inside the second limiting hole, the clamping hole forming part of the through hole 21.

[0058] In some embodiments, the first limiting hole, the through hole, and the clamping hole are coaxially arranged with decreasing radii, and the height of the through hole is lower than that of the first limiting hole but higher than that of the clamping hole. This facilitates the entry of the bar into the spindle channel from above, and the progressively decreasing radius of the holes makes the bar feeding more convenient.

[0059] According to some embodiments of this utility model, the inner shell top cover 13 and the mounting plate 20 are connected by a first bearing 30. Specifically, the mounting plate 20 has a bearing groove 22 in the through hole 21, the first bearing 30 is disposed in the bearing groove 22, and the inner shell 12 and the outer shell 11 are movably connected by a second bearing 40, the first bearing 30 and the second bearing 40 being ball bearings.

[0060] The inner shell top cover 13 and the mounting plate 20 are connected by a first bearing 30, enabling relative rotation. The mounting plate 20 will not rotate, while the inner shell top cover 13 can rotate with the main shaft. The inner shell 12 and the outer shell 11 are movably connected by a second bearing 40, allowing the inner shell 12 to rotate relative to the outer shell 11. The inner shell 12 can rotate with the main shaft.

[0061] According to some embodiments of this utility model, the second bearing 40 is a deep groove ball bearing, and the first bearing 30 is a thrust ball bearing.

[0062] Compared to existing clamping devices, the chuck of this friction stir additive manufacturing equipment utilizes a thrust ball bearing to withstand strong radial forces and a deep groove ball bearing to withstand radial forces, enabling the chuck to meet the upsetting forces required during deposition manufacturing.

[0063] In another aspect of this utility model, according to an embodiment of this utility model, a peristaltic continuous rod feeding stirring friction deposition manufacturing device includes the chuck in the above embodiment.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least some embodiments or examples of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0065] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A chuck for a friction stir additive manufacturing system, characterized in that, include: Mounting plate, the mounting plate having through holes for the bar to pass through; A housing rotatably mounted on the mounting plate, the axis of the housing coinciding with the axis of the through hole, a medium cavity formed inside the housing and a through hole penetrating the housing along the axis of the housing, the axis of the through hole coinciding with the axis of the through hole; A piston, a drive member, and a clamping member are provided, wherein the piston is slidably mounted in the medium cavity, and the piston includes a drive section adapted to drive the drive member to move, the drive member being adapted to drive the clamping member to move. The clamping member is slidably mounted on the housing along a first direction, and the movement direction of the driving member and the axial direction of the housing both intersect the first direction. The clamping member is suitable for clamping a bar.

2. The chuck according to claim 1, characterized in that, The driving components include multiple components, which are slidably mounted on the housing along the axial direction. The axis of each driving component is parallel to the axis of the housing along the radial direction of the housing. Each driving component includes a first driving surface and a second driving surface disposed at both ends along its axial direction. The first driving surface extends radially along the piston, and the driving segment extends radially outward. The first driving surface faces the driving segment and is adapted to abut against the driving segment. The multiple driving components are evenly spaced along the circumference of the housing, and the second driving surface extends radially from the inside outward at a gradually downward angle.

3. The chuck according to claim 2, characterized in that, The clamping member includes a plurality of clamping members, each of which is correspondingly arranged with a plurality of driving members. The clamping members are slidably mounted on the housing along a first direction. Each clamping member includes a first end along the axis direction close to the housing and a second end away from the axis direction of the housing. The second end is adapted to fit against the second driving surface. The end face of the first end extends along the axis direction of the housing, and the end faces of the first ends of the plurality of clamping members are adapted to extend radially into the through hole from the peripheral wall of the through hole.

4. The chuck according to claim 1, characterized in that, It also includes a mounting base, which is fixedly connected to the mounting plate. The mounting base is hollow, and the housing is rotatably mounted inside the mounting base.

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

6. The chuck according to claim 1, characterized in that, The housing includes a first housing and a second housing, the first housing being at least partially hollow and having one end open, the second housing closing the open end of the first housing to form the medium cavity, and the drive member and the clamping member being mounted on the first housing.

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

8. The chuck according to claim 2, characterized in that, The piston includes a main body section and a drive section. The axis of the main body section coincides with the axis of the drive section. The drive section extends radially outward along the main body section and is adapted to abut against the first drive surface.

9. The chuck according to claim 6, characterized in that, The first shell is provided with a first limiting groove facing the medium cavity, and the second shell is provided with a second limiting groove facing the medium cavity. The two axial ends of the piston are respectively installed in the first limiting groove and the second limiting groove.

10. The chuck according to claim 6, characterized in that, The first shell has a first through hole, the second shell has a second through hole, and the piston has a third through hole. The through hole, the second through hole, the third through hole, and the first through hole are connected in sequence, wherein the diameter of the through hole, the diameter of the second through hole, the diameter of the third through hole, and the diameter of the first through hole decrease in sequence.

11. A friction stir additive manufacturing device, characterized in that, Includes the chuck as described in any one of claims 1-10.

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