Feeding apparatus and friction stir additive manufacturing device

Abstract

A feeding apparatus and a friction stir additive manufacturing device. The feeding apparatus comprises: a base; a feeding main shaft which is rotatably provided on the base, the feeding main shaft being hollow so as to form a material conveying channel; and a rod material driving mechanism which at least comprises a first feeding engagement member and a second feeding engagement member arranged in correspondence with one another. The first feeding engagement member and the second feeding engagement member are spaced apart along the radial direction of the first feeding engagement member so as to form a driving channel corresponding to the material conveying channel; and the rod material driving mechanism further comprises a first driving component which is used for driving the first feeding engagement member and the second feeding engagement member to rotate relative to one another.

Description

Feeding device and friction stir additive manufacturing equipment

[0001] Cross-reference to related applications

[0002] This application is based on Chinese patent application No. 202411280177.1, filed on September 12, 2024, Chinese patent application No. 202411280178.6, filed on September 12, 2024, and Chinese patent application No. 202411280181.8, filed on September 12, 2024, and claims priority to the above Chinese patent applications, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the field of additive manufacturing, and in particular, to a feeding device and a friction stir additive manufacturing equipment. BACKGROUND

[0004] Friction stir additive manufacturing is divided into bar feeding friction stir additive manufacturing, particle feeding friction stir additive manufacturing and wire feeding friction stir additive manufacturing according to the raw materials. Bar feeding structure additive manufacturing is difficult to realize continuous additive manufacturing because the bar is segmented and the bar is in a rotating state during the additive manufacturing process. SUMMARY

[0005] The present application aims to at least partially solve one of the technical problems in the related art.

[0006] To this end, one object of the present application is to provide a feeding device applied to a friction stir additive manufacturing equipment, comprising: a base; a feeding spindle rotatably arranged on the base, the feeding spindle being hollow to form a feeding channel; a bar driving mechanism comprising at least a pair of corresponding first and second feeding engagement members, the first and second feeding engagement members being arranged radially apart from each other and forming a driving channel corresponding to the feeding channel; the bar driving mechanism further comprising a first driving assembly for driving the first and second feeding engagement members to rotate relative to each other to drive the bar to enter the feeding channel along the axial direction of the feeding channel.

[0007] According to the above technical features, the first feeding engagement member and the second feeding engagement member are used to drive the movement of the bar material, so that the adjustment of the clamping force of the bar material is easy to realize, and the adjustment of the downward pushing force is realized, that is, the greater the clamping force, the greater the pushing force, and the smaller the clamping force, the smaller the pushing force. When the structure is applied to the friction stir additive manufacturing equipment, the pressure between the bar material and the base material can be adjusted by adjusting the clamping force during the friction stirring of the bar material and the base material, so that the additive manufacturing is better realized. At the same time, the structure can also realize the continuous feeding of the bar material and the continuous additive manufacturing, and has the characteristics of compact structure.

[0008] In some embodiments of the present application, the first feeding engagement member and / or the second feeding engagement member is a meshing tooth structure.

[0009] In some embodiments of the present application, in the first feeding engagement member and the second feeding engagement member arranged correspondingly, one of the first feeding engagement member and the second feeding engagement member is a driven member, and the other is a driving member.

[0010] In some embodiments of the present application, in the axial direction of the material conveying channel, the first feeding engagement member and the second feeding engagement member are arranged in multiple pairs.

[0011] In some embodiments of the present application, in the multiple pairs of first feeding engagement members and second feeding engagement members arranged correspondingly, in any two adjacent pairs of first feeding engagement members and second feeding engagement members arranged correspondingly, the two driving members are respectively located on both sides of the axial direction of the material conveying channel; or all the driving members are located on one side of the axial direction of the material conveying channel, and all the driven members are located on the other side of the axial direction of the material conveying channel.

[0012] In some embodiments of the present application, the bar material driving mechanism further comprises a transmission member, and the first driving assembly is in transmission with the first feeding engagement member and / or the second feeding engagement member through the transmission member.

[0013] In some embodiments of the present application, the bar material driving mechanism further comprises a transmission member, and the first driving assembly is in transmission with the driving member through the transmission member.

[0014] In some embodiments of the present application, the transmission member comprises a first transmission member and a second transmission member, and the driving members located on one side of the axial direction of the material conveying channel are in transmission through the first transmission member, and the driving members located on the other side of the axial direction of the material conveying channel are in transmission through the second transmission member.

[0015] In some embodiments of the present application, the transmission member is a worm gear transmission assembly, the first transmission member is a first worm gear transmission assembly, and the second transmission member is a second worm gear transmission assembly, wherein a worm gear of the worm gear transmission assembly is coaxially arranged with the driving member, and a worm of the worm gear transmission assembly is driven by the first driving assembly.

[0016] In some embodiments of the present application, the first transmission member is a first worm, and is engaged with the first feeding engagement member, and the second transmission member is a second worm, and is engaged with the second feeding engagement member.

[0017] In some embodiments of the present application, the transmission member includes a first transmission member and a second transmission member, and the first transmission member and the second transmission member are respectively linked with the first feeding engagement member and the second feeding engagement member; wherein the first driving assembly drives the first transmission member and the second transmission member to rotate, so as to drive the first feeding engagement member and the second feeding engagement member to relatively rotate.

[0018] In some embodiments of the present application, a driving support is further included, the worm of the transmission member is arranged on the driving support, the axes of the worms of the first transmission member and the second transmission member are parallel to the axis of the feeding channel, the first feeding engagement member and the second feeding engagement member are arranged between the worm of the first transmission member and the worm of the second transmission member, and the axes of the first feeding engagement member and the second feeding engagement member are perpendicular to the axis of the feeding channel.

[0019] In some embodiments of the present application, the driving support is connected with the base, the first driving assembly includes a feeding driving motor, the feeding driving motor is fixedly installed on the driving support, and the rotating speed of the worm of the transmission member is greater than the rotating speed of the feeding main shaft.

[0020] In some embodiments of the present application, the driving support is connected with the feeding main shaft, and the first driving assembly includes a motor.

[0021] In some embodiments of the present application, the driving support is connected with the feeding main shaft, and the first driving assembly includes a hollow motor, the hollow motor includes an avoiding channel, and the avoiding channel is correspondingly arranged with the driving channel.

[0022] In some embodiments of the present application, a hollow motor driving shaft is arranged on the hollow motor, the hollow motor driving shaft is hollow, a driving gear is arranged on the hollow motor driving shaft, a first driven gear and a second driven gear are respectively arranged on the worm of the first transmission member and the worm of the second transmission member, and the first driven gear and the second driven gear are engaged with the driving gear.

[0023] In some embodiments of the present application, the motor comprises a first driving shaft, the bar driving mechanism further comprises a third transmission member and a fourth transmission member arranged axially spaced along the first driving shaft, the first driving shaft is in transmission connection with the worm in the first transmission member through the third transmission member, and the first driving shaft is in transmission connection with the worm in the second transmission member through the fourth transmission member.

[0024] In some embodiments of the present application, the bar driving mechanism further comprises an auxiliary wheel, the auxiliary wheel and the worm in the transmission member are arranged on the driving support in a circumferential direction of the material conveying passage, and the motor drives the auxiliary wheel and the worm to rotate simultaneously.

[0025] In some embodiments of the present application, one of the first feeding engagement member and the second feeding engagement member is a meshing tooth structure, and the other is a meshing wheel structure, the first feeding engagement member is a first feeding engagement tooth, the second feeding engagement member is a second feeding engagement wheel, the bar driving mechanism comprises a driving support, the first feeding engagement tooth and the second feeding engagement wheel are arranged in rotation on the driving support, the axis of the first feeding engagement tooth and the second feeding engagement wheel is perpendicular to the axis of the material conveying passage, and the first driving assembly is used for driving the first feeding engagement tooth to rotate.

[0026] In some embodiments of the present application, a plurality of the second feeding engagement wheels are arranged in the axial direction of the material conveying passage.

[0027] In some embodiments of the present application, the gap of the driving passage is adjustable.

[0028] According to an embodiment of the present application, a friction stir additive manufacturing equipment comprises a feeding device as described in any one of the preceding embodiments; a friction stir additive device, the friction stir additive device comprises an additive welding tool and an additive spindle; wherein the additive welding tool is arranged at the bottom end of the additive spindle.

[0029] In some embodiments of the present application, the additive spindle and the feeding spindle are an integrated shaft.

[0030] According to an embodiment of the present application, a friction stir additive manufacturing device comprises: a friction stir additive device, the friction stir additive device comprising a rotatable additive spindle, the additive spindle being hollow to form a material conveying passage for accommodating a rod material; a pre-stage material feeding mechanism, the pre-stage material feeding mechanism being located upstream of the friction stir additive device, the pre-stage material feeding mechanism comprising a posture adjusting mechanism, the posture adjusting mechanism being configured to adjust a posture of the rod material to a preset posture, the posture adjusting mechanism comprising a feeding passage, the feeding passage being coaxially arranged with the material conveying passage, wherein the rod material in the preset posture can enter the material conveying passage through the feeding passage; and a rod material driving mechanism, the rod material driving mechanism being located between the friction stir additive device and the pre-stage material feeding mechanism, the rod material driving mechanism being configured to receive the rod material in the feeding passage and drive the rod material to move in the material conveying passage along an axial direction of the material conveying passage.

[0031] In some embodiments of the present application, the friction stir additive manufacturing device further comprises: a rod material transfer device, the rod material transfer device comprising a clamping mechanism, the clamping mechanism being adapted to transfer the rod material to a feeding position of the material conveying passage.

[0032] In some embodiments of the present application, the friction stir additive manufacturing device further comprises: a rod material storage, the rod material storage being configured to store the rod material; and the clamping mechanism being adapted to move between the rod material storage and the feeding position of the material conveying passage to transfer the rod material in the rod material storage to the feeding position of the material conveying passage.

[0033] In some embodiments of the present application, the friction stir additive manufacturing device further comprises: a material pressing device, the material pressing device being configured to push the rod material from top to bottom after the rod material enters the material conveying passage.

[0034] In some embodiments of the present application, the material pressing device comprises a material pressing base, a material pressing support and a material pressing head, the material pressing support comprising a mounting plate and a mounting frame, the mounting plate being slidably mounted on the material pressing base along a first direction, the mounting frame being slidably mounted on the mounting plate along a second direction, and the material pressing head being mounted on the mounting frame, wherein the first direction is an axial direction of the material conveying passage, and the second direction is perpendicular to the first direction.

[0035] In some embodiments of the present application, the friction-based additive manufacturing device further comprises a pre-feeding mechanism located upstream of the friction-based additive device, the pre-feeding mechanism comprising a posture adjusting mechanism for adjusting the posture of the rod to a preset posture, the posture adjusting mechanism comprising a feeding channel coaxially arranged with the material feeding channel, wherein the rod in the preset posture can enter the material feeding channel through the feeding channel; the rod driving mechanism is located between the friction-based additive device and the pre-feeding mechanism, and is used to receive the rod in the feeding channel and drive the rod to move in the material feeding channel along the axial direction of the material feeding channel.

[0036] In some embodiments of the present application, the pre-feeding mechanism comprises a feeding support, a first receiving member, a second receiving member and a third receiving member, and the axes of the first receiving member, the second receiving member and the third receiving member are collinear; the first receiving member is hollow to form a feeding channel, the second receiving member is hollow to form a receiving channel, and the third receiving member is hollow to form the feeding channel; the first receiving member, the second receiving member and the third receiving member are sequentially arranged along the axis of the feeding channel, and the second receiving member is slidably mounted on the feeding support along the axis of the feeding channel, so that the feeding channel, the receiving channel and the feeding channel are selectively communicated.

[0037] In some embodiments of the present application, the second receiving member and the third receiving member are rotatably mounted on the feeding support.

[0038] In some embodiments of the present application, the posture adjusting mechanism is a hollow rod structure, which comprises a feeding part and a guide part arranged sequentially, at least a part of the feeding part forms the feeding channel, the guide part is configured in a flared shape, the guide part comprises a first end arranged close to the feeding part and a second end arranged away from the feeding part, the cross-sectional shape of the first end is consistent with the cross-sectional shape of the rod, the cross-sectional shape of the second end is circular, and the first end and the second end are transitioned by a transition surface to form a guide surface.

[0039] In some embodiments of the present application, the first receiving member is provided with a first limiting groove, the second receiving member is provided with a first limiting protrusion and a second limiting protrusion, the third receiving member is provided with a second limiting groove, and in the process of moving the second receiving member to the first receiving member, the first limiting protrusion can be clamped into the first limiting groove, and in the process of moving the second receiving member to the third receiving member, the second limiting protrusion can be clamped into the second limiting groove.

[0040] In some embodiments of the present application, the side wall of the feeding channel is provided with a first guide part extending axially towards the second receiving part, the first limiting protrusion is formed on the side wall of the second receiving part, the first guide part is formed as a ratchet extending axially, and the first limiting groove is formed at the root of the ratchet of the first guide part.

[0041] In some embodiments of the present application, the second receiving part comprises a sliding seat, the feeding support comprises a sliding rail extending axially, and the sliding seat is in sliding fit with the sliding rail; the second receiving part further comprises a rotating part rotatably mounted on the sliding seat, and the rotating part is hollow to form the receiving channel.

[0042] In some embodiments of the present application, the feeding support further comprises a first mounting plate and a second mounting plate, the first mounting plate and the second mounting plate are arranged axially spaced apart, the sliding rail is mounted between the first mounting plate and the second mounting plate, the first mounting plate is provided with a first through hole, the second mounting plate is provided with a second through hole, the first through hole is sleeved outside the first receiving part, and the second through hole is sleeved outside the third receiving part.

[0043] In some embodiments of the present application, the front-stage feeding mechanism further comprises an elastic reset member, the elastic reset member is abutted between the second mounting plate and the sliding seat to keep the second limiting protrusion out of the second limiting groove in normal state.

[0044] In some embodiments of the present application, the first limiting protrusion and the second limiting protrusion are each provided with a rotating bearing, the axis of the rotating bearing is perpendicular to the axis of the first receiving part, and the rotating bearing is adapted to slide along the inclined surface of the corresponding ratchet.

[0045] In some embodiments of the present application, the ratchet of the first receiving part and the ratchet of the third receiving part are opposite in tooth shape.

[0046] In some embodiments of the present application, the first receiving part is rotatably mounted on the feeding support.

[0047] In some embodiments of the present application, the bar driving mechanism comprises a driving bracket connected with the additive spindle, the driving bracket is provided with oppositely arranged first feeding engagement teeth and second feeding engagement teeth, the first feeding engagement teeth and the second feeding engagement teeth are radially spaced apart to form a driving channel for accommodating the bar in the feeding channel, and the first feeding engagement teeth and the second feeding engagement teeth drive the bar to move along the axis of the feeding channel in the feeding channel.

[0048] Additional aspects and advantages of the present application will be in part apparent and in part pointed out below. BRIEF DESCRIPTION OF DRAWINGS

[0049] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the references to the figures, in which:

[0050] Fig. 1 is a structural schematic diagram of a feeding device according to one embodiment of the present application;

[0051] Fig. 2 is a structural schematic diagram of a feeding device according to another embodiment of the present application;

[0052] Fig. 3 is a structural schematic diagram of a specific implementation of the first driving assembly in Fig. 1 according to the present application;

[0053] Fig. 4 is a structural schematic diagram of a feeding device according to yet another embodiment of the present application;

[0054] Fig. 5 is a structural schematic diagram of a bar driving mechanism and a frictional additive device according to one embodiment of the present application;

[0055] Fig. 6 is a schematic diagram of a continuous feeding frictional additive manufacturing equipment according to one embodiment of the present application;

[0056] Fig. 7 is a structural schematic diagram of a front-stage feeding mechanism according to one embodiment of the present application;

[0057] Fig. 8 is a structural schematic diagram of a front-stage feeding mechanism according to another embodiment of the present application;

[0058] Fig. 9 is a structural schematic diagram of a pressing equipment according to one embodiment of the present application;

[0059] Fig. 10 is a top view of a bar warehouse and a bar transfer device according to one embodiment of the present application;

[0060] Fig. 11 is a partial structural schematic diagram of a bar warehouse and a bar transfer device according to one embodiment of the present application.

[0061] Fig. 1-4, the feeding device comprises a base, a feeding spindle 10-1 and a bar driving mechanism, the feeding spindle 10-1 is rotationally arranged on the base, and the feeding spindle 10-1 is hollow to form a feeding channel 11; the bar driving mechanism at least comprises a pair of corresponding first feeding engagement members and second feeding engagement members, the first feeding engagement members and the second feeding engagement members are arranged along the radial direction of the first feeding engagement members and are spaced apart, and form a driving channel 40 corresponding to the feeding channel 11. The bar driving mechanism further comprises a first driving assembly, the first driving assembly is used to drive the first feeding engagement members and the second feeding engagement members to rotate relatively to drive the bar to enter the feeding channel 11 along the axial direction of the feeding channel 11. DETAILED DESCRIPTION

[0062] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent 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 application, and cannot be understood as a limitation of the present application.

[0063] As shown in FIG. 1-4, the feeding device comprises a base, a feeding spindle 10-1 and a bar driving mechanism, the feeding spindle 10-1 is rotationally arranged on the base, and the feeding spindle 10-1 is hollow to form a feeding channel 11; the bar driving mechanism at least comprises a pair of corresponding first feeding engagement members and second feeding engagement members, the first feeding engagement members and the second feeding engagement members are arranged along the radial direction of the first feeding engagement members and are spaced apart, and form a driving channel 40 corresponding to the feeding channel 11. The bar driving mechanism further comprises a first driving assembly, the first driving assembly is used to drive the first feeding engagement members and the second feeding engagement members to rotate relatively to drive the bar to enter the feeding channel 11 along the axial direction of the feeding channel 11.

[0064] As shown in FIG. 1 and FIG. 2, it can be understood that the first feeding engagement member (for example, the first feeding engagement tooth 21 of FIG. 1) and the second feeding engagement member (for example, the second feeding engagement tooth 22 of FIG. 1) can be arranged in parallel and spaced apart, and the first feeding engagement member and the second feeding engagement member can be relatively rotated to form a driving channel 40, when the bar material 100 enters the driving channel 40, the relatively rotated first feeding engagement member and the second feeding engagement member can engage the bar material 100 to move it towards the material conveying channel 11 and in the axial direction of the material conveying channel 11, and then drive the bar material 100 into the material conveying channel 11. Then the feeding spindle 10-1 arranged in rotation on the base can drive the bar material in the material conveying channel 11 to rotate, and the rotating bar material can continuously rub against the base plate to generate heat, thereby realizing plastic softening, so as to realize friction stir additive manufacturing. Further, the way of driving the bar material to move by using the first feeding engagement member and the second feeding engagement member can form a pushing force towards the base plate in the axial direction of the bar material, which helps to generate heat by friction stirring, and the size of the pushing force can be adjusted by adjusting the clamping force between the two engagement members. When this structure is applied to a friction stir additive manufacturing device, the pressure between the bar material 100 and the base material can be adjusted by adjusting the clamping force during the friction stirring process of the bar material 100 and the base material, so as to better realize additive manufacturing.

[0065] According to the above technical features, because the first feeding engagement member and the second feeding engagement member are used to drive the bar material to move, it is easy to adjust the clamping force of the bar material, and then adjust the size of the downward pushing force, that is, the greater the clamping force, the greater the pushing force, and the smaller the clamping force, the smaller the pushing force. When this structure is applied to a friction stir additive manufacturing device, the pressure between the bar material 100 and the base material can be adjusted by adjusting the clamping force during the friction stirring process of the bar material 100 and the base material, so as to better realize additive manufacturing. At the same time, this structure can also realize continuous feeding of the bar material 100 and thus realize continuous additive manufacturing, and has the characteristics of compact structure.

[0066] In some embodiments of the present application, the first feeding engagement member and / or the second feeding engagement member is a tooth structure.

[0067] In the above technical solution, the first feeding engagement member and the second feeding engagement member can both be tooth structures; or one of the first feeding engagement member and the second feeding engagement member is a tooth structure, and the other is a gear structure.

[0068] As shown in FIG. 1, when the first feeding engagement member and the second feeding engagement member are both engagement tooth structures, i.e., the first feeding engagement member is the first feeding engagement tooth 21 and the second feeding engagement member is the second feeding engagement tooth 22, when the bar 100 enters the driving channel 40, the relatively rotating first feeding engagement tooth 21 and the second feeding engagement tooth 22 can engage the bar 100 to move it towards the feeding channel 11 and along the axial direction of the feeding channel 11, and then drive the bar 100 into the feeding channel 11. When the first feeding engagement member and the second feeding engagement member are both engagement tooth structures, the engagement force is greater, which can provide greater pressure.

[0069] As shown in FIG. 4, when one of the first feeding engagement member and the second feeding engagement member is an engagement tooth structure and the other is an engagement wheel structure, i.e., the first feeding engagement member is the first feeding engagement tooth 21 and the second feeding engagement member is the second feeding engagement wheel 42, when the bar 100 enters the driving channel 40, the relatively rotating first feeding engagement tooth 21 and the second feeding engagement wheel 42 can engage the bar 100 to move it towards the feeding channel 11 and along the axial direction of the feeding channel 11, and then drive the bar 100 into the feeding channel 11. When one of the first feeding engagement member and the second feeding engagement member is an engagement tooth structure and the other is an engagement wheel structure, the friction of the engagement wheel structure is relatively small, which can improve the service life.

[0070] In the above solutions, the engagement tooth can be a toothed structure on the peripheral surface of a wheel body, can be a gear, can be a helical gear, a double helical gear, etc.; the engagement wheel can be a smooth wheel, a surface-processed grooved wheel, or a rubber wheel, etc.

[0071] In some embodiments of the present application, in the corresponding first feeding engagement member and the second feeding engagement member, one of the first feeding engagement member and the second feeding engagement member is a driven member and the other is a driving member.

[0072] In the above technical solution, the first feeding engagement member can be a driving member and the second feeding engagement member can be a driven member, so that when the bar is fed, the first feeding engagement member can drive the second feeding engagement member to rotate when the first feeding engagement member rotates. The first feeding engagement member can also be a driven member and the second feeding engagement member can be a driving member, so that in the feeding process, the second feeding engagement member can drive the first feeding engagement member to rotate when the second feeding engagement member rotates. Through the above method, a more flexible feeding engagement member combination solution can be provided, and the method of using one as a driving member and the other as a driven member can also be beneficial to simplify the synchronous control logic of the two feeding engagement members, facilitate the synchronous movement of the first feeding engagement member and the second feeding engagement member to feed the bar 100, and can also reduce the risk of slipping between the first feeding engagement member and the second feeding engagement member and the bar 100, improve the reliability of the feeding process, and reduce the wear of the bar 100. In addition, it can also reduce the risk of interference of the power transmission arrangement, and has the characteristics of more compact structure.

[0073] Optionally, the first feeding engagement member and the second feeding engagement member can be in pairs or not in pairs.

[0074] In some embodiments of the present application, the first feeding engagement member and the second feeding engagement member are arranged in pairs in the axial direction of the material conveying passage 11. It can be understood that the first feeding engagement member and the second feeding engagement member can be but not limited to one pair, two pairs, three pairs, four pairs, and the like in the axial direction of the material conveying passage 11. For example, as shown in FIG. 1, the first feeding engagement member and the second feeding engagement member are one pair in the axial direction of the material conveying passage 11. For another example, the first feeding engagement member and the second feeding engagement member are four pairs in the axial direction of the material conveying passage 11.

[0075] In some embodiments of the present application, in the first feeding engagement member and the second feeding engagement member arranged in pairs, in any two adjacent pairs of the first feeding engagement member and the second feeding engagement member, two driving members are respectively located on both sides of the axial direction of the material conveying passage 11; or all the driving members are located on one side of the axial direction of the material conveying passage 11, and all the driven members are located on the other side of the axial direction of the material conveying passage 11.

[0076] It can be understood that, in the first feeding engagement member and the second feeding engagement member arranged in pairs, in any two adjacent pairs of the first feeding engagement member and the second feeding engagement member, two driving members are respectively located on both sides of the axial direction of the material conveying passage, and thus two driven members are also respectively located on both sides of the axial direction of the material conveying passage 11. In this scheme, the plurality of driving members can be staggered, which can improve the stability of the feeding process of the first feeding engagement member and the second feeding engagement member arranged in pairs.

[0077] In the first feeding engagement member and the second feeding engagement member arranged in pairs, all the driving members can also be located on one side of the axial direction of the material conveying passage 11, and all the driven members are located on the other side of the axial direction of the material conveying passage 11. In this scheme, all the driving members are arranged on the same side, which is conducive to the arrangement of the first driving assembly, and can reduce the structural complexity of the device.

[0078] In some embodiments of the present application, the bar driving mechanism further comprises a transmission member, and the first driving assembly is in transmission with the first feeding engagement member and / or the second feeding engagement member through the transmission member.

[0079] One of the first feeding engagement member and the second feeding engagement member can be a driving member, and the other can be a driven member. When the first feeding engagement member is the driving member, the first driving assembly is in driving connection with the first feeding engagement member through the transmission member to drive the first feeding engagement member to rotate. When the second feeding engagement member is the driving member, the first driving assembly is in driving connection with the second feeding engagement member through the transmission member to drive the second feeding engagement member to rotate. The first feeding engagement member and the second feeding engagement member can also both be driving members, and the first driving assembly can be in driving connection with the first feeding engagement member and the second feeding engagement member through the transmission member to simultaneously drive the first feeding engagement member and the second feeding engagement member to rotate.

[0080] In the above technical solution, the first driving assembly is in driving connection with the first feeding engagement member and / or the second feeding engagement member through the transmission member, so that the first driving assembly can avoid directly driving the first feeding engagement member and / or the second feeding engagement member, and the driving mode of the first driving assembly and the first feeding engagement member and / or the second feeding engagement member can be flexibly arranged.

[0081] In some embodiments of the present application, the bar driving mechanism further comprises a transmission member, and the first driving assembly is in driving connection with the driving member through the transmission member. Referring to the foregoing embodiments, one of the first feeding engagement member and the second feeding engagement member is the driving member, and the first driving assembly is in driving connection with the driving member through the transmission member.

[0082] In some embodiments of the present application, the transmission member comprises a first transmission member 31 and a second transmission member 32. The driving members located on one side of the axis direction of the material conveying channel 11 are all in driving connection with the first transmission member 31, and the driving members located on the other side of the axis direction of the material conveying channel 11 are all in driving connection with the second transmission member 32. In this technical solution, the first driving assembly can be in driving connection with the driving members located on both sides of the axis direction of the material conveying channel 11 through the first transmission member 31 and the second transmission member 32. Compared with a single transmission member drivingly connecting the driving members located on both sides of the axis direction of the material conveying channel 11, this can improve the power transmission redundancy between the first driving assembly and the driving members, and is beneficial to improving the driving reliability between the first driving assembly and the driving members.

[0083] In some embodiments of the present application, the transmission member is a worm and gear transmission assembly, the first transmission member 31 is a first worm and gear transmission assembly, and the second transmission member 32 is a second worm and gear transmission assembly. In this technical solution, the worm and gear transmission assembly can comprise a worm and a gear. The worm can be fixed relative to the corresponding driving member, and the gear can be driven by the first driving assembly.

[0084] In some embodiments of the present application, the first transmission member 31 is a first worm, and is engaged with the first feeding engagement member, and the second transmission member 32 is a second worm, and is engaged with the second feeding engagement member. The first feeding engagement member and the second feeding engagement member can be integrated with a worm gear structure, for example, the first feeding engagement member and the second feeding engagement member are provided with an integrally formed worm gear, the first worm is engaged with the worm gear part of the first feeding engagement member, and the second worm is engaged with the worm gear part of the second feeding engagement member.

[0085] In an embodiment of the present application, the transmission member includes a first transmission member 31 and a second transmission member 32, which are respectively linked with the first feeding engagement member and the second feeding engagement member; wherein the first driving assembly drives the first transmission member 31 and the second transmission member 32 to rotate, so as to drive the first feeding engagement member and the second feeding engagement member to relatively rotate.

[0086] In combination with the foregoing, taking the first feeding engagement member as the first feeding engagement tooth 21 and the second feeding engagement member as the second feeding engagement tooth 22 as an example, the first transmission member 31 and the second transmission member 32 are respectively engaged with the first feeding engagement tooth 21 and the second feeding engagement tooth 22; the bar stock driving mechanism further includes a first driving assembly, which drives the first transmission member 31 and the second transmission member 32 to rotate, and in turn drives the first feeding engagement tooth 21 and the second feeding engagement tooth 22 to relatively rotate.

[0087] The present application can easily adjust the gap between the first feeding engagement member and the second feeding engagement member to realize the adjustment of the clamping force of the bar stock 100, that is, the gap of the driving channel 40 is adjustable, and in turn the adjustment of the downward pushing force is realized, that is, the greater the clamping force, the greater the pushing force, and the smaller the clamping force, the smaller the pushing force.

[0088] In an embodiment of the present application, the bar stock driving mechanism further includes a driving bracket 50, the worm in the transmission member is arranged on the driving bracket 50, the axes of the worm in the first transmission member 31 and the worm in the second transmission member 32 are parallel to the axis of the material conveying channel 11, the first feeding engagement member and the second feeding engagement member are arranged between the worm of the first transmission member 31 and the worm of the second transmission member 32, and the axes of the first feeding engagement member and the second feeding engagement member are perpendicular to the axis of the material conveying channel 11.

[0089] As shown in FIG. 1, taking the first feeding engagement member as the first feeding engagement tooth 21 and the second feeding engagement member as the second feeding engagement tooth 22 as an example, the first feeding engagement tooth 21 and the second feeding engagement tooth 22 are arranged transversely, and can relatively rotate, so as to well drive the bar stock 100 to enter the material conveying channel 11 along the axis direction of the material conveying channel 11.

[0090] In one embodiment of the present application, the driving support 50 is connected with the base, and the first driving assembly comprises a feeding driving motor 60 fixedly installed on the driving support 50, and the rotating speed of the worm in the transmission member is greater than the rotating speed of the feeding main shaft 10-1.

[0091] In the above technical solution, the driving support 50 is rotatably arranged on the base, and the feeding main shaft 10-1 and the bar 100 driven by the feeding main shaft 10-1 can rotate relative to the driving support 50. In another embodiment of the present application, the driving support 50 can be connected with the feeding main shaft 10-1, and the driving support 50 can rotate with the rotation of the feeding main shaft 10-1. In this embodiment, the bar 100 does not rotate relative to the driving support 50.

[0092] The specific structure of the driving support 50 rotatably connected with the base will be described below.

[0093] As shown in FIG. 1, the first driving assembly is the feeding driving motor 60 fixedly installed on the driving support 50, the driving support 50 is rotatably installed on the base, and thus the feeding main shaft 10-1 can rotate relative to the driving support 50. The first transmission member 31 and the second transmission member 32 are rotatably arranged on the driving support 50, and the first feeding engagement tooth 21 and the second feeding engagement tooth 22 are also rotatably arranged on the driving support 50. In this structure, if the feeding driving motor 60 does not drive the first transmission member 31 and the second transmission member 32 to rotate, the rotating bar 100 will drive the first feeding engagement tooth 21 and the second feeding engagement tooth 22 to rotate, and then drive the first transmission member 31 and the second transmission member 32 to rotate, and then the transmission member such as the belt between the feeding driving motor 60 and the first transmission member 31 and the second transmission member 32 will rotate in the opposite direction according to the rotation of the feeding main shaft 10-1, at this time, the bar 100 is conveyed upward, which is different from the expectation. Therefore, if the bar 100 needs to move downward during rotation, the rotating speed of the first transmission member 31 and the second transmission member 32 needs to be greater than the rotating speed of the feeding main shaft 10-1.

[0094] In the above structure, one feeding driving motor 60 can be used to drive the first transmission member 31 and the second transmission member 32 to rotate, which avoids the problem of different steps in the double-motor control process.

[0095] The specific structure of the driving support 50 connected with the feeding main shaft 10-1, i.e., the driving support 50 can rotate with the rotation of the feeding main shaft 10-1, will be described below. In this structure, a common motor can be used to drive the first transmission member 31 and the second transmission member 32 to rotate through, for example, a belt; or a hollow motor can be used to drive the first transmission member 31 and the second transmission member 32 to rotate through, for example, a gear.

[0096] In the embodiment that the first transmission member 31 and the second transmission member 32 are driven to rotate by the common motor through, for example, a belt, the first driving assembly specifically comprises a motor, which can be arranged, for example, beside the first transmission member 31 and can drive the first transmission member 31 and the second transmission member 32 to rotate through, for example, a belt.

[0097] Further, as shown in FIG. 1, the motor comprises a first driving shaft, and the bar driving mechanism further comprises a third transmission member 61 and a fourth transmission member 62 arranged axially along the first driving shaft, the first driving shaft is in transmission connection with the worm of the first transmission member 31 through the third transmission member 61, and the first driving shaft is in transmission connection with the worm of the second transmission member 32 through the fourth transmission member 62. That is, the first driving shaft and the two transmission members simultaneously drive the first transmission member 31 and the second transmission member 32 to rotate, and in this structure, the third transmission member 61 and the fourth transmission member 62 can form a height difference to simultaneously drive the first transmission member 31 and the second transmission member 32 to rotate. The third transmission member 61 and the fourth transmission member 62 can be belts or chains and the like.

[0098] In another embodiment, the bar driving mechanism can further comprise an auxiliary wheel 35, as shown in FIG. 3, the auxiliary wheel 35 and the worm of the transmission member are arranged on the driving support 50 along the circumference of the material conveying passage 11, and the motor simultaneously drives the auxiliary wheel 35, the first transmission member 31 and the second transmission member 32 to rotate.

[0099] It can be understood that the auxiliary wheel 35 can be arranged on the driving support 50 along the circumference of the material conveying passage 11 with the worm of the first transmission member 31 and the worm of the second transmission member 32, and the auxiliary wheel 35, the first transmission member 31 and the second transmission member 32 can be simultaneously driven to rotate by one transmission member, for example, a belt, so as to realize that one motor simultaneously drives the first transmission member 31 and the second transmission member 32 to rotate and avoid the problem of asynchronization in the double-motor control process.

[0100] In the embodiment that the first transmission member 31 and the second transmission member 32 are driven to rotate by the hollow motor through, for example, a gear, the first driving assembly comprises a hollow motor 70. As shown in FIG. 1, the hollow motor 70 comprises an avoiding passage 71, which is arranged correspondingly with the driving passage 40, and the avoiding passage 71 can make the bar 100 pass through the hollow motor 70 when the bar 100 enters the driving passage 40. The avoiding passage 71 is a hollow passage, and the axis line thereof coincides with the axis line of the material conveying passage 11.

[0101] In a specific embodiment, the hollow motor 70 is provided with a hollow motor drive shaft, the hollow motor drive shaft is hollow, and the hollow motor drive shaft is part of the avoiding passage 71. The hollow motor drive shaft is sleeved with a drive gear 72, the first transmission member 31 and the second transmission member 32 are respectively provided with a first driven gear 33 and a second driven gear 34, and the first driven gear 33 and the second driven gear 34 are engaged with the drive gear 72. In this way, one hollow motor 70 can be used to drive the first transmission member 31 and the second transmission member 32 to rotate at the same time, thereby avoiding the problem of different steps in the double-motor control process.

[0102] In an embodiment of the present application, the gap of the driving passage 40 is adjustable. For example, the first feeding engagement tooth 21 and the second feeding engagement tooth 22 are detachably mounted on the driving support 50, and the gap of the driving passage 40 can be adjusted by adjusting the radius of the first feeding engagement tooth 21 and the second feeding engagement tooth 22. For another example, the first feeding engagement tooth 21 and the first transmission member 31 are arranged on the first support, the second feeding engagement tooth 22 and the second transmission member 32 are arranged on the second support, and the gap of the driving passage 40 can be adjusted by adjusting the gap between the first support and the second support.

[0103] In some embodiments of the present application, as shown in FIG. 4, one of the first feeding engagement member and the second feeding engagement member is a tooth structure, and the other is a wheel structure, the first feeding engagement member is the first feeding engagement tooth 21, the second feeding engagement member is the second feeding engagement wheel 42, the bar driving mechanism includes a driving support 50, the first feeding engagement tooth 21 and the second feeding engagement wheel 42 are rotatably arranged on the driving support 50, the axis of the first feeding engagement tooth 21 and the second feeding engagement wheel 42 is perpendicular to the axis of the feeding passage 11, and the first driving assembly is used to drive the first feeding engagement tooth 21 to rotate.

[0104] The following will specifically explain the scheme that one of the first feeding engagement member and the second feeding engagement member is a tooth structure, and the other is a wheel structure, i.e., the first feeding engagement member is the first feeding engagement tooth 21, and the second feeding engagement member is the second feeding engagement wheel 42.

[0105] As shown in FIG. 4, the bar driving mechanism includes a driving support 50, the driving support 50 is connected with the feeding main shaft 10-1, i.e., the driving support 50 can rotate with the feeding main shaft 10-1. The first feeding engagement tooth 21 and the second feeding engagement wheel 42 are rotatably arranged on the driving support 50, the axis of the first feeding engagement tooth 21 and the second feeding engagement wheel 42 is perpendicular to the axis of the feeding passage 11, and the first driving assembly is used to drive the first feeding engagement tooth 21 to rotate. The rotating first feeding engagement tooth 21 and the second feeding engagement wheel 42 interact with each other to bite the bar to move along the axis direction of the feeding passage 11, so as to realize additive manufacturing.

[0106] The second feeding engagement wheel 42 can be polished to reduce friction.

[0107] In an embodiment of the present application, the first driving assembly can include a motor, which can directly drive the first feeding engagement tooth 21 to rotate, or drive the first feeding engagement tooth 21 to rotate through a speed reducer, or drive the first feeding engagement tooth 21 to rotate through a worm.

[0108] In an embodiment of the present application, the second feeding engagement wheel 42 is provided in plurality, and the plurality of second feeding engagement wheels 42 are arranged along the axis direction of the feeding channel 11, i.e., form a sliding wall, to reduce the friction.

[0109] Similarly, in the above scheme, the gap of the driving channel 40 is adjustable. For example, the second feeding engagement wheel 42 is arranged on the first support, the first support is fixedly arranged on the driving support 50, and the radius of the first feeding engagement tooth 21 and / or the second feeding engagement wheel 42 is adjustable, so that the gap of the driving channel 40 is adjustable. Alternatively, the first feeding engagement tooth 21 is arranged on the third support, and the gap between the third support and the first support is adjusted, so that the gap of the driving channel 40 is adjustable.

[0110] In an embodiment of the present application, the friction stir additive manufacturing equipment can further include a second driving member 80 and a transmission belt, and the second driving member 80 is in transmission with the feeding spindle 10-1 through the transmission belt. The second driving member 80 is arranged on the base, and drives the feeding spindle 10-1 to rotate on the base through the transmission belt.

[0111] In an embodiment of the present application, as shown in FIG. 5, one motor can be used to directly drive the first feeding engagement tooth 21 or the second feeding engagement tooth 22 to rotate. In addition, two motors can be used to respectively drive the first feeding engagement tooth 21 and the second feeding engagement tooth 22 to rotate. Thus, there are various implementation manners for driving the first feeding engagement tooth 21 and the second feeding engagement tooth 22 to rotate.

[0112] According to an embodiment of the present application, a friction stir additive manufacturing equipment includes a feeding device as any of the above embodiments, and a friction additive device, which includes an additive welding tool and an additive spindle; wherein the additive welding tool is arranged at the bottom end of the additive spindle. The structure and operation of the additive welding tool mentioned herein are known to those skilled in the art, and will not be described here.

[0113] In some embodiments of the present application, the additive spindle and the feeding spindle 10-1 are an integral shaft. It can be understood that the additive spindle of the friction additive device and the feeding spindle 10-1 of the friction stir additive manufacturing equipment can be the same shaft, for example, the additive spindle is a lower shaft part, and the feeding spindle 10-1 is an upper shaft part.

[0114] As shown in FIGS. 6-11, the frictional additive manufacturing device of the embodiments of the present application comprises a frictional additive device, a pre-feeding mechanism and a rod driving mechanism. The frictional additive device comprises a rotatable additive spindle, and the additive spindle is hollow to form a feeding channel 11 for accommodating the rod 100. The pre-feeding mechanism is located upstream of the frictional additive device, and the pre-feeding mechanism comprises a posture adjusting mechanism for adjusting the posture of the rod 100 to a preset posture. The posture adjusting mechanism comprises a feeding channel 131 coaxially arranged with the feeding channel 11, and the rod 100 in the preset posture can enter the feeding channel 11 through the feeding channel 131. The rod driving mechanism is located between the frictional additive device and the pre-feeding mechanism, and the rod driving mechanism is used to receive the rod 100 in the feeding channel 131 and drive the rod 100 to move in the axial direction of the feeding channel 11.

[0115] As shown in FIG. 6, the rotating additive spindle can drive the rod 100 to rotate and then rub on the substrate 9, so as to deposit the rod 100 on the substrate 9 in a plasticized state, thereby realizing the frictional additive manufacturing. Through this method, composite materials such as aluminum-copper composite materials can be manufactured. However, it is not easy to realize the automatic continuous feeding of the rotating additive spindle.

[0116] As shown in FIGS. 1 and 6, the frictional additive manufacturing device comprises a rotatable additive spindle, and the additive spindle is hollow to form a feeding channel 11 for accommodating the rod 100. In one embodiment, the frictional additive device further comprises a second driving member 80 and a transmission belt, and the second driving member 80 is in transmission with the additive spindle through the transmission belt. The second driving member 80 can be a motor, which is arranged on the base and drives the additive spindle to rotate on the base through the transmission belt.

[0117] The rod driving mechanism is located upstream of the frictional additive device, and the rod driving mechanism is used to drive the rod 100 to move in the axial direction of the feeding channel 11. As shown in FIG. 2 and FIG. 7, FIG. 2 is a rod driving mechanism, and FIG. 7 is a pre-feeding mechanism located upstream of the rod driving mechanism, i.e., the rod driving mechanism is located between the frictional additive device and the pre-feeding mechanism. The pre-feeding mechanism comprises a posture adjusting mechanism for adjusting the posture of the rod 100 to a preset posture. The posture adjusting mechanism comprises a feeding channel 131 coaxially arranged with the feeding channel 11, and the rod 100 in the preset posture can enter the feeding channel 11 through the feeding channel 131. The rod driving mechanism can receive the rod 100 in the feeding channel 131 and drive the rod 100 to move in the axial direction of the feeding channel 11.

[0118] In some embodiments of the present application, the friction stir additive manufacturing device further comprises a bar stock bin for storing bar stock, which can store a plurality of bar stocks 100. As shown in FIG. 7, FIG. 10 and FIG. 11, the friction stir additive manufacturing device further comprises a bar stock transfer device, which comprises a clamping mechanism 200 adapted to transfer the bar stock 100 in the bar stock bin to the feeding channel 131. Specifically, the clamping mechanism 200 is adapted to move between the bar stock bin and the pre-feeding mechanism to transfer the bar stock 100 in the bar stock bin to the feeding channel 111.

[0119] In the present application, the bar stock 100 in the bar stock bin is delivered to the pre-feeding mechanism (FIG. 7) by the bar stock transfer device (FIG. 10 and FIG. 11), and the pre-feeding mechanism is provided with a posture adjustment mechanism which can adjust the bar stock 100 to a preset posture, and then the bar stock 100 in the preset posture enters the feeding channel 131 and passes through the feeding channel 131 to the bar stock driving mechanism (FIG. 2), which drives the bar stock 100 to move along the axis of the feeding channel 11 in the feeding channel 11, applies a certain pressure to the bar stock 100, and the additive spindle is rotatable, so that the bar stock 100 can be stirred and frictioned on the substrate 9, and then plasticized and deposited on the substrate 9, so as to realize automatic continuous feeding and continuous additive manufacturing. The posture adjustment mechanism can not only adapt to circular bar stocks 100, but also adapt to bar stocks 100 of other shapes, such as square, pentagonal and triangular bar stocks 100.

[0120] The above not only specifically and in detail describes the structure of the bar stock driving mechanism rotating with the rotation of the additive spindle, but also describes the structure of the bar stock driving mechanism not rotating with the rotation of the additive spindle.

[0121] When the bar stock driving mechanism rotates with the rotation of the additive spindle, especially for bar stocks 100 with a cross-sectional shape other than a circle, there are certain difficulties in automatic continuous feeding.

[0122] The pre-feeding mechanism of the bar stock driving mechanism rotating with the rotation of the additive spindle, which can realize automatic continuous feeding, will be specifically described below.

[0123] Specifically, as shown in FIG. 7 and FIG. 8, the front-stage feeding mechanism comprises a feeding support, a first receiving member 110, a second receiving member 120 and a third receiving member 130, the second receiving member 120 and the third receiving member 130 are rotatably installed on the feeding support, and the axes of the first receiving member 110, the second receiving member 120 and the third receiving member 130 are collinear; the first receiving member 110 is hollow to form a feeding passage 111, the second receiving member 120 is hollow to form a receiving passage, the third receiving member 130 is hollow to form a feeding passage 131, the first receiving member 110, the second receiving member 120 and the third receiving member 130 are sequentially and spacedly arranged along the axis of the feeding passage 111, and the second receiving member 120 is slidably installed on the feeding support along the axis of the feeding passage 111, so that the feeding passage 111, the receiving passage and the feeding passage 131 are selectively communicated; for example, when the second receiving member 120 slides towards the third receiving member 130, it can cooperate with the third receiving member 130 to make the receiving passage and the feeding passage 131 communicated. When the second receiving member 120 slides towards the first receiving member 110, it can cooperate with the first receiving member 110 to make the receiving passage and the feeding passage 111 communicated. Further, the second receiving member 120 comprises a sliding seat 123, the feeding support comprises a sliding rail 109 extending along the axial direction, and the sliding seat 123 slidably cooperates with the sliding rail 109, so that the second receiving member 120 is slidable along the axis of the feeding passage 111.

[0124] The third receiving member 130 is connected with the driving support 50 or the additive spindle, and the feeding channel 131 is arranged in correspondence with the driving channel 40. The connection of the third receiving member 130 with the driving support 50 means that the third receiving member 130 rotates with the driving support 50 when the driving support 50 rotates with the additive spindle. In the present application, the third receiving member 130 is rotatably installed on the feeding support, and can rotate with the additive spindle, so that the feeding channel 131 arranged on the third receiving member 130 can continuously feed the bar material to the additive welding tool (including a welding head, etc.). In order to connect the receiving channel arranged on the second receiving member 120 with the feeding channel 131 arranged on the rotating third receiving member 130, the second receiving member 120 is further provided with a second limiting protrusion 122-2, and the third receiving member 130 is further provided with a second limiting groove 132, so that the second limiting protrusion 122-2 is clamped into the second limiting groove 132, the second receiving member 120 and the third receiving member 130 rotate at the same time, the receiving channel and the feeding channel 131 are connected, and the bar material 100 can enter the feeding channel 131 from the receiving channel to realize feeding. The shape of the bar material 100 can be circular or other shapes, such as square, triangle, etc. Especially for the square or polygonal bar material 100, the above structure can well center the bar material 100 in the receiving channel and the feeding channel 131, that is, through the simultaneous rotation of the second receiving member 120 and the third receiving member 130, the posture of the receiving channel is consistent with the posture of the feeding channel 131, so that the bar material 100 can enter the feeding channel 131 arranged on the third receiving member 130 in the rotating state from the receiving channel.

[0125] Further, the first receiving member 110 is provided with a first limiting groove 112, the second receiving member 120 is provided with a first limiting protrusion 122-1 and a second limiting protrusion 122-2, and the third receiving member 130 is provided with a second limiting groove 132. The first limiting protrusion 122-1 is adapted to be clamped into the first limiting groove 112, and the second limiting protrusion 122-2 is adapted to be clamped into the second limiting groove 132. When it is necessary to fill the bar material 100, the second receiving member 120 slides along the axis of the feeding channel 111 to the first receiving member 110. In the process of sliding, the first limiting protrusion 122-1 can be clamped into the first limiting groove 112, so that the posture of the receiving channel is consistent with the posture of the feeding channel 111, that is, the receiving channel and the feeding channel 111 are connected, and thus the bar material 100 can enter the receiving channel from the feeding channel 111. The slidable second receiving member 120 can also be clamped into the second limiting groove 132 through the second limiting protrusion 122-2, so that the receiving channel and the feeding channel 131 are connected, and the bar material can enter the feeding channel 131 through the receiving channel. When the feeding channel 131 is connected with the spindle of the friction stir additive equipment, it can well realize the continuous feeding of the bar material.

[0126] In an embodiment of the present application, the second receiving member 120 and the third receiving member 130 are rotatably mounted on the feeding support. Optionally, the first receiving member 110 is also rotatably mounted on the feeding support.

[0127] Thus, the bar 100 with a square cross-section, for example, enters the receiving channel from the feeding channel 111, and one end of the bar 100 moves with the second receiving member 120 towards the third receiving member 130. Under the action of the second limiting protrusion 122-2 and the second limiting groove 132, the receiving channel and the feeding channel 131 are connected. When the bar 100 is square and long enough, the first receiving member 110, the second receiving member 120 and the third receiving member 130 will rotate simultaneously under the action of the bar 100, so that the first receiving member 110 is rotatably arranged.

[0128] When the bar 100 is square and relatively short, i.e., the bar 100 is separated from the feeding channel 111 after entering the receiving channel, the first receiving member 110 can be arranged without rotation. The bar 100 moves with the second receiving member 120 away from the first receiving member 110 towards the third receiving member 130, and then under the action of the second limiting protrusion 122-2 and the second limiting groove 132, the receiving channel and the feeding channel 131 are connected, and the bar 100 enters the feeding channel 131. At this time, the second receiving member 120 and the third receiving member 130 rotate simultaneously, but do not drive the first receiving member 110 to rotate, so that the first receiving member 110 does not need to rotate, and the first receiving member 110 does not rotate, and the posture of the feeding channel 111 can be fixed, so as to facilitate automatic feeding.

[0129] Further, the driving force of the second receiving member 120 moving towards the third receiving member 130 can be the bar 100 falling freely under gravity and driving the second receiving member 120 to move by friction. At this time, an elastic return member can be arranged between the second receiving member 120 and the third receiving member 130 to reset the second receiving member 120. Alternatively, a second receiving member driving structure, such as a second receiving member driving cylinder, is used to drive the second receiving member 120 to slide on the support, so that the structure is reliable.

[0130] Further, the sidewall of the feeding channel 111 is provided with a first guide part extending axially towards the second receiving member 120, the first limiting protrusion 122-1 is formed on the sidewall of the second receiving member 120, the first guide part is formed as a ratchet extending axially, and the first limiting groove 112 is formed at the root of the ratchet of the first guide part; the second limiting protrusion 122-2 is formed on the sidewall of the second receiving member 120, the sidewall of the feeding channel 131 is provided with a second guide part extending axially towards the second receiving member 120, the second guide part is formed as a ratchet extending axially, and the second limiting groove 132 is formed at the root of the ratchet of the second guide part. The first limiting protrusion 122-1 and the second limiting protrusion 122-2 are both provided with a rotating bearing, the axis of the rotating bearing is perpendicular to the axis of the first receiving member 110, and the rotating bearing is adapted to slide along the inclined surface of the corresponding ratchet.

[0131] Optionally, the ratchet on the first receiving member 110 is opposite to the ratchet on the third receiving member 130 in shape.

[0132] As shown in FIG. 7 and FIG. 8, even if the third receiving member 130 rotates, the limiting protrusion can slide along the inclined surface of the corresponding ratchet, and then be guided to the limiting groove.

[0133] In an embodiment of the present application, the second receiving member 120 comprises a sliding seat 123 and a rotating part, the rotating part is rotatably installed on the sliding seat 123, the rotating part is hollow to form a receiving channel, and the feeding support comprises a sliding rail 109 extending axially, and the sliding seat 123 is in sliding cooperation with the sliding rail 109. For example, the sliding rail 109 is a guide column, and the sliding seat 123 is provided with a sliding shaft sleeve (not shown in the figure), and the reliable sliding of the sliding seat 123 can be realized by sliding the sliding shaft sleeve on the guide column.

[0134] In the present application, one or more of the first receiving member 110, the second receiving member 120 and the third receiving member 130 can be a metal piece, which is beneficial to improve the service life of the feeding device.

[0135] In an embodiment of the present application, the feeding support further comprises a first mounting plate 107 and a second mounting plate 108, the first mounting plate 107 and the second mounting plate 108 are arranged axially spaced apart, the sliding rail 109 is installed between the first mounting plate 107 and the second mounting plate 108, the first mounting plate 107 is provided with a first through hole, the second mounting plate 108 is provided with a second through hole, the first through hole is sleeved outside the first receiving member 110, the second through hole is sleeved outside the third receiving member 130, and the sliding rail 109 is installed between the first mounting plate 107 and the second mounting plate 108.

[0136] In an embodiment of the present application, the front-stage feeding mechanism further comprises an elastic reset member abutting between the second mounting plate 108 and the sliding seat 123 to keep the second limiting protrusion 122-2 disengaged from the second limiting groove 132 in the normal state.

[0137] In another specific embodiment, the posture adjusting mechanism can be a hollow rod structure, which comprises a feeding part and a guide part arranged in sequence, at least a part of the feeding part forms the feeding channel 131, and the guide part is configured in a flared shape and comprises a first end arranged close to the feeding part and a second end arranged away from the feeding part, the cross-sectional shape of the first end is consistent with the cross-sectional shape of the bar 100, the cross-sectional shape of the second end is circular, and the first end and the second end are connected through a transition surface. In this way, even if the bar is square, the posture of the bar can be gradually adjusted to the preset posture under the guidance of the transition surface to enter the feeding channel 11.

[0138] It can be understood that the front-stage feeding mechanism in the present application is applied to the friction stir additive manufacturing, and realizes the friction stir additive manufacturing. For example, a friction stir additive manufacturing equipment is provided with an additive spindle, the additive spindle is provided with a conveying channel 11 for accommodating the bar 100, and the feeding device can convey the bar 100 into the conveying channel 11. The additive spindle can rotate to drive the bar 100 in the conveying channel 11 to rotate, and the rotating bar 100 can continuously stir and rub with the substrate 9 to generate heat, thereby realizing plastic softening to realize the friction stir additive manufacturing. The third receiving member 130 arranged in rotation is beneficial to being mounted on the additive spindle to continuously feed the additive spindle. In order to connect the receiving channel of the second receiving member 120 and the feeding channel 131 of the rotating third receiving member 130, the second receiving member 120 also needs to be arranged in rotation. In this way, the second limiting protrusion 122-2 is clamped into the second limiting groove 132, so that the second receiving member 120 and the third receiving member 130 rotate at the same time, the receiving channel and the feeding channel 131 are connected, and thus the bar can enter the feeding channel 131 from the receiving channel to realize feeding.

[0139] As shown in FIG. 9, in some embodiments of the present application, the friction stir additive manufacturing equipment further comprises a pressing device for pushing the bar 100 from top to bottom after the bar enters the feeding channel 11.

[0140] Optionally, the pressing device comprises a pressing base 310, a pressing support 320 and a pressing head 330, the pressing support 320 comprises a mounting plate and a mounting frame, the mounting plate is slidingly mounted on the pressing base 310 along a first direction, the mounting frame is slidingly mounted on the mounting plate along a second direction, and the pressing head 330 is mounted on the mounting frame. The first direction is the axial direction of the feeding channel 111, and the second direction is perpendicular to the first direction. It can be understood that the pressing head 330 can extend into the upstream of the feeding channel 111 along the second direction when needed, and then apply a certain pressure to the bar 100 in the feeding channel 111 along the first direction. Thus, one end of the bar 100 can sequentially pass through the feeding channel 111, the receiving channel and the feeding channel 131, and then enter the driving channel 40 formed between the first feeding engagement tooth 21 and the second feeding engagement tooth 22. After the first feeding engagement tooth 21 and the second feeding engagement tooth 22 relatively rotate to engage the bar 100, the pressing head 330 can return along the original path.

[0141] In one embodiment, as shown in FIGS. 10 and 11, the bar storage bin can be located beside the friction additive device, and the bar transfer device is arranged between the bar storage bin and the friction additive device, so that the bar transfer device can clamp the bar 100 from the bar storage bin through the clamping mechanism 200 arranged on the mechanical arm, for example. For example, the bars 100 are vertically placed in the bar storage bin, and a plurality of bars 100 are arranged at intervals. After the clamping mechanism 200 clamps the bar 100, it is lifted upward, then rotated by a certain angle, and then extended into the upstream of the feeding channel 111 along the second direction. The clamping mechanism 200 is released, and the bar 100 freely falls into the feeding channel 111, and then the pressing head 330 starts to work.

[0142] The above describes that the third receiving member 130 can be rotatably arranged. When the third receiving member 130 is rotatably arranged, in order to receive bars in a square shape, for example, a second guide structure is also arranged. For example, a part of the feeding channel 111 forms the second guide structure, and the second guide structure is used to guide the bar 100 to a preset state. Specifically, the second guide structure can be in the shape of a flared shape, the cross-sectional shape of one end is circular, the cross-sectional shape of the other end is consistent with the cross-sectional shape of the bar, for example, square, and the first end and the second end are transitioned through a transition surface. Thus, the bar in a square shape can be gradually adjusted to a preset posture through the guidance of the transition surface and then enter the feeding channel 111.

[0143] In the description of the specification, the description of the terms "some embodiments", "optionally", "further", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are contained in at least one embodiment or example of the present application. In the description of the specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0144] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A feeding device for use in a friction stir additive manufacturing apparatus, wherein, The utility model relates to a bar feeding device, comprising: a base; a feeding spindle rotatably arranged on the base, the feeding spindle being hollow to form a feeding channel; a bar driving mechanism comprising at least a pair of corresponding first feeding engaging members and second feeding engaging members, the first feeding engaging members and the second feeding engaging members being radially spaced apart along the first feeding engaging members and forming a driving channel corresponding to the feeding channel; the bar driving mechanism further comprises a first driving assembly for driving the first feeding engaging members and the second feeding engaging members to rotate relatively to drive a bar to enter the feeding channel along the axis of the feeding channel.

2. The feeder device of claim 1, wherein, The first feeding engaging members and / or the second feeding engaging members are in the form of engaging teeth.

3. The feeder device of claim 1, wherein, In the corresponding first feeding engaging members and second feeding engaging members, one of the first feeding engaging members and the second feeding engaging members is a driven member, and the other is a driving member.

4. The feeder device of claim 3, wherein, In the axis direction of the feeding channel, the first feeding engaging members and the second feeding engaging members are arranged in multiple pairs.

5. The feeder device of claim 4, wherein, In the multiple pairs of corresponding first feeding engaging members and second feeding engaging members, in any two adjacent pairs of corresponding first feeding engaging members and second feeding engaging members, the two driving members are respectively located on both sides of the axis direction of the feeding channel; or, all the driving members are located on one side of the axis direction of the feeding channel, and all the driven members are located on the other side of the axis direction of the feeding channel.

6. The feeder device of claim 1, wherein, The bar driving mechanism further comprises a transmission member, and the first driving assembly drives the first feeding engaging members and / or the second feeding engaging members through the transmission member.

7. The feeder device of claim 4, wherein, The bar driving mechanism further comprises a transmission member, and the first driving assembly drives the driving members through the transmission member.

8. The feeder device of claim 7, wherein, The transmission member comprises a first transmission member and a second transmission member, the driving members located on one side of the axis direction of the feeding channel are driven by the first transmission member, and the driving members located on the other side of the axis direction of the feeding channel are driven by the second transmission member.

9. The feeder device of claim 8, wherein, The transmission member is a worm and gear transmission assembly, the first transmission member is a first worm and gear transmission assembly, and the second transmission member is a second worm and gear transmission assembly, wherein the worm of the worm and gear transmission assembly is coaxially arranged with the driving members, and the worm of the worm and gear transmission assembly is driven by the first driving assembly.

10. The feeder device of claim 8, wherein, The first transmission member is a first worm and engages with the first feeding engaging members, and the second transmission member is a second worm and engages with the second feeding engaging members.

11. The feeder device of claim 6, wherein, The transmission member comprises a first transmission member and a second transmission member, the first transmission member and the second transmission member are respectively linked with the first feeding engaging members and the second feeding engaging members; wherein the first driving assembly drives the first transmission member and the second transmission member to rotate to drive the first feeding engaging members and the second feeding engaging members to rotate relatively.

12. The feeder device of claim 9 or 10, wherein, The driving support is connected with the base, the first driving assembly comprises a feeding driving motor, and the feeding driving motor is fixedly installed on the driving support.

13. The feeder device of claim 12, wherein, The driving support is connected with the feeding main shaft, and the first driving assembly comprises a motor.

14. The feeder device of claim 12, wherein, The driving support is connected with the feeding main shaft, and the first driving assembly comprises a hollow motor.

15. The feeder device of claim 12, wherein, The hollow motor is provided with a hollow motor driving shaft, the hollow motor driving shaft is hollow, the hollow motor driving shaft is provided with a driving gear, the worm of the first transmission member and the worm of the second transmission member are respectively provided with a first driven gear and a second driven gear, and the first driven gear and the second driven gear are engaged with the driving gear.

16. The feeder device of claim 15, wherein, The rod driving mechanism further comprises a third transmission member and a fourth transmission member which are arranged axially along the first driving shaft, the first driving shaft is in transmission connection with the worm of the first transmission member through the third transmission member, and the first driving shaft is in transmission connection with the worm of the second transmission member through the fourth transmission member.

17. The feeder device of claim 14, wherein, The rod driving mechanism further comprises an auxiliary wheel, the auxiliary wheel and the worm of the transmission member are arranged on the driving support in a circumferential direction of the feeding channel, and the motor drives the auxiliary wheel and the worm to rotate simultaneously.

18. The feeder device of claim 15, wherein, One of the first feeding engagement member and the second feeding engagement member is a meshing tooth structure, and the other is a meshing wheel structure, the first feeding engagement member is a first feeding engagement tooth, the second feeding engagement member is a second feeding engagement wheel, the rod driving mechanism comprises a driving support, the first feeding engagement tooth and the second feeding engagement wheel are arranged to rotate on the driving support, the axis of the first feeding engagement tooth and the second feeding engagement wheel is perpendicular to the axis of the feeding channel, and the first driving assembly is used for driving the first feeding engagement tooth to rotate.

19. The feeder of claim 1, wherein, The second feeding engagement wheel is provided in plurality, and the plurality of second feeding engagement wheels are arranged in the axial direction of the feeding channel.

20. The feeder device of claim 19, wherein, The gap of the driving channel is adjustable.

21. The feeder device of any one of claims 1 to 20, wherein, The feeding device comprises:

22. A friction stir additive manufacturing apparatus, wherein, The feeding device according to any one of claims 1 to 21; The frictional additive device comprises an additive welding tool and an additive main shaft. The additive main shaft and the feeding main shaft are integrated shafts. The frictional additive device comprises a rotatable additive main shaft, and the additive main shaft is hollow to form a feeding channel for accommodating a rod.

23. The friction stir additive manufacturing apparatus of claim 22, wherein, ​ 24. A friction stir additive manufacturing apparatus, wherein, ​ ​ A front-stage feeding mechanism is located upstream of the frictional additive device, and comprises a posture adjustment mechanism for adjusting the posture of the rod material to a preset posture, and the posture adjustment mechanism comprises a feeding channel coaxially arranged with the feeding channel, wherein the rod material in the preset posture can enter the feeding channel through the feeding channel. A rod material driving mechanism is located between the frictional additive device and the front-stage feeding mechanism, and is used for receiving the rod material in the feeding channel and driving the rod material to move in the feeding channel along the axial direction of the feeding channel.

25. Friction stir additive manufacturing apparatus according to claim 22 or 23 or 24, wherein, Further comprising: A rod material transfer device comprising a clamping mechanism adapted to transfer the rod material to the feeding position of the feeding channel.

26. The friction stir additive manufacturing apparatus of claim 25, wherein, Further comprising: A rod material warehouse for storing the rod material, and the clamping mechanism is adapted to move between the rod material warehouse and the feeding position of the feeding channel to transfer the rod material in the rod material warehouse to the feeding position of the feeding channel.

27. The friction stir additive manufacturing apparatus of claim 22 or 23 or 24, wherein, Further comprising: A pressing device for pushing the rod material from top to bottom after the rod material enters the feeding channel.

28. The friction stir additive manufacturing apparatus of claim 27, wherein, The pressing device comprises a pressing base, a pressing support and a pressing head, the pressing support comprises a mounting plate and a mounting frame, the mounting plate is slidingly mounted on the pressing base along a first direction, the mounting frame is slidingly mounted on the mounting plate along a second direction, and the pressing head is mounted on the mounting frame, wherein the first direction is the axial direction of the feeding channel, and the second direction is perpendicular to the first direction.

29. The friction stir additive manufacturing apparatus of claim 22, wherein, Further comprising: A front-stage feeding mechanism is located upstream of the frictional additive device, and comprises a posture adjustment mechanism for adjusting the posture of the rod material to a preset posture, and the posture adjustment mechanism comprises a feeding channel coaxially arranged with the feeding channel, wherein the rod material in the preset posture can enter the feeding channel through the feeding channel.

30. The friction stir additive manufacturing apparatus as defined in claim 24 or 29, wherein, The front-stage feeding mechanism comprises a feeding support, a first receiving member, a second receiving member and a third receiving member, and the axial lines of the first receiving member, the second receiving member and the third receiving member are collinear; The first receiving member is hollow to form a feeding channel, the second receiving member is hollow to form a receiving channel, and the third receiving member is hollow to form the feeding channel, the first receiving member, the second receiving member and the third receiving member are sequentially and spacedly arranged along the axial line of the feeding channel, and the second receiving member is slidingly mounted on the feeding support along the axial line of the feeding channel, so that the feeding channel, the receiving channel and the feeding channel are selectively communicated.

31. The friction stir additive manufacturing apparatus of claim 30, wherein, The second receiving member and the third receiving member are rotatably mounted on the feeding support.

32. The friction stir additive manufacturing apparatus of claim 31, wherein, The posture adjusting mechanism is a hollow rod structure, which comprises a feeding part and a material guiding part arranged in sequence, at least a part of the feeding part forms the feeding channel, the material guiding part is configured in a flared shape, the material guiding part comprises a first end arranged close to the feeding part and a second end arranged away from the feeding part, the cross-sectional shape of the first end is consistent with the cross-sectional shape of the rod material, the cross-sectional shape of the second end is circular, and the first end and the second end are connected through a transition surface to form a guiding surface.

33. The friction stir additive manufacturing apparatus of claim 31, wherein, The first receiving member is provided with a first limiting groove, the second receiving member is provided with a first limiting protrusion and a second limiting protrusion, the third receiving member is provided with a second limiting groove, and during movement of the second receiving member to the first receiving member, the first limiting protrusion can be clamped into the first limiting groove, and during movement of the second receiving member to the third receiving member, the second limiting protrusion can be clamped into the second limiting groove.

34. The friction stir additive manufacturing apparatus of claim 33, wherein, The side wall of the feeding channel is provided with a first guiding part extending in the direction of approaching the second receiving member along the axial direction, the first limiting protrusion is formed on the side wall of the second receiving member, the first guiding part is formed as a ratchet extending along the axial direction, and the first limiting groove is formed at the root of the ratchet of the first guiding part. The side wall of the feeding channel is provided with a second guiding part extending in the direction of approaching the second receiving member along the axial direction, the second limiting protrusion is formed on the side wall of the second receiving member, the second guiding part is formed as a ratchet extending along the axial direction, and the second limiting groove is formed at the root of the ratchet of the second guiding part.

35. The friction stir additive manufacturing apparatus of claim 33, wherein, The second receiving member comprises a sliding seat, the feeding support comprises a sliding rail extending along the axial direction, and the sliding seat is in sliding cooperation with the sliding rail; the second receiving member further comprises a rotating part, the rotating part is rotatably installed on the sliding seat, and the rotating part is hollow to form the receiving channel.

36. The friction stir additive manufacturing apparatus of claim 35, wherein, The feeding support further comprises a first mounting plate and a second mounting plate, the first mounting plate and the second mounting plate are arranged in axial direction and spaced apart, the sliding rail is installed between the first mounting plate and the second mounting plate, the first mounting plate is provided with a first through hole, the second mounting plate is provided with a second through hole, the first through hole is sleeved outside the first receiving member, and the second through hole is sleeved outside the third receiving member.

37. The friction stir additive manufacturing apparatus of claim 36, wherein, The front-stage feeding mechanism further comprises an elastic reset member, the elastic reset member is abutted between the second mounting plate and the sliding seat to keep the second limiting protrusion away from the second limiting groove in a normal state.

38. The friction stir additive manufacturing apparatus of claim 34, wherein, Rotating bearings are arranged on the first limiting protrusion and the second limiting protrusion, the axis of the rotating bearing is perpendicular to the axis of the first receiving member, and the rotating bearing is adapted to slide along the inclined surface of the corresponding ratchet.

39. The friction stir additive manufacturing apparatus of claim 34, wherein, The tooth shape of the ratchet of the first receiving member is opposite to that of the ratchet of the third receiving member.

40. The friction stir additive manufacturing apparatus of claim 30, wherein, The first receiving member is rotatably installed on the feeding support.

41. The friction stir additive manufacturing apparatus of claim 24, wherein, The rod driving mechanism comprises a driving support connected with the additive main shaft, the driving support is provided with oppositely arranged first feeding engagement teeth and second feeding engagement teeth, the first feeding engagement teeth and the second feeding engagement teeth are radially spaced apart to form a driving channel between the first feeding engagement teeth and the second feeding engagement teeth, the driving channel is used for accommodating the rod in the feeding channel, and the first feeding engagement teeth and the second feeding engagement teeth drive the rod to move in the feeding channel along the axial direction of the feeding channel.

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