A powder mixing device for laser additive manufacturing
By designing multiple storage tanks and independently controlled agitator, the problems of cumbersome and poor flexibility of feeding in traditional powder mixing devices are solved, and efficient and accurate powder mixing and feeding are achieved, avoiding the flying and adhesion of powder.
Patent Information
- Application Number
- CN202411459573.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2044-10-18
AI Technical Summary
Traditional powder mixing devices are complicated to operate when feeding, which can easily lead to flying and contamination of powder. The equipment is poorly flexible and cannot be flexibly adjusted according to actual needs, which affects the mixing effect and feeding accuracy.
A powder mixing device including a lower cylinder, an upper cylinder and a connecting plate is designed. A plurality of storage tanks and a stirring shafts are provided in the storage rack. A variety of powders are realized through the electric push rod control baffle switch. The rotary ring is placed in turn and the powder adhesion is reduced through elastic hanging sheets and tapping blocks during rotation. The rotation speed of the stirring shaft and the rotary ring can be independently controlled, and the connecting plate is sealed by nuts and screws.
The feeding operation is simplified, the feeding accuracy and mixing effect are improved, and the powder leakage and flying are avoided. The device can be flexibly adjusted according to the needs to adapt to different types and quantities of powder mixing.
Smart Images
Figure CN118988046B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of metal powder processing, in particular to a powder mixing device for laser additive manufacturing. Background Art
[0002] In the field of laser additive manufacturing (also known as 3D printing), the quality of the powder mix directly affects the performance and quality of the final product.
[0003] Traditional powder mixing devices usually adopt a single mixing drum structure, and the powder is mixed in the drum by an agitator.
[0004] However, this mixing method has the following shortcomings: Inconvenient feeding: When feeding, the traditional mixing device needs to frequently open the barrel cover, which is not only cumbersome to operate, but also easy to cause powder to fly and pollute the environment. Powder adhesion problem: During the mixing and feeding process, the powder is easy to adhere to the inner wall of the barrel and the agitator, affecting the mixing effect and feeding accuracy. Poor equipment flexibility: Traditional mixing devices can usually only perform a single mixing operation and cannot be flexibly adjusted according to actual needs. Summary of the invention
[0005] The purpose of the present invention is to provide a powder mixing device for laser additive manufacturing to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a powder mixing device for laser additive manufacturing, comprising a lower cylinder, an upper cylinder is installed above the lower cylinder, the lower cylinder is used to hold powder for laser additive manufacturing, a connecting plate is installed between the lower cylinder and the upper cylinder, a material storage rack is fixed to the inner ring of the connecting plate, a plurality of material storage slots are arranged inside the material storage rack, a material guide slot is opened on the top surface of the material storage rack, a material feeding port is opened between the material guide slot and the material storage slot, a material discharge port is opened on the bottom surface of the material storage slot, and a middle part of the material storage rack is rotatably connected to the material storage rack. There is a stirring shaft, and the middle part of the storage rack is rotatably connected with a driving gear, the driving gear meshes with a transmission gear, the transmission gear is rotatably connected to the inside of the storage rack, and the transmission gear meshes with a swivel, the swivel is rotatably connected to the side wall of the storage trough, a connecting rod is fixed to the inner ring surface of the swivel, one end of the connecting rod is fixed to the surface of the rotating rod, and spiral material plates are provided at both ends of the rotating rod, and the two sets of spiral material plates extend into the guide trough and the discharge port respectively. The top end of the stirring shaft is fixed to the bottom end of the shaft body of the servo motor through a coupling, and the servo motor is fixed to the top surface of the upper cylinder.
[0007] Preferably, the top end of the lower cylinder and the bottom end of the upper cylinder are both integrally formed with a connecting plate, a plurality of bolt holes are provided on the surface of the connecting plate, the connecting plate is a ring plate structure with a "T"-shaped cross-section, screws are fixed in the upper groove body of the connecting plate and the lower groove body of the connecting plate, the screws and the bolt holes correspond one to one, after the screws pass through the bolt holes, nuts are threaded on the rod body of the screws, sealing gaskets are fixed in the upper groove body of the connecting plate and the lower groove body of the connecting plate, after the nuts and the screws are locked, the sealing gaskets are compressed to produce elastic deformation.
[0008] Preferably, a weight-reducing cavity is provided inside the material storage rack, and the weight-reducing cavity is in the form of an annular groove, and a plurality of ball pulleys are fixed to the top surface of the material storage rack.
[0009] Preferably, the material storage trough is a circular trough, and there are multiple material storage troughs, which are distributed in a circle with the stirring shaft as the central axis. The material guide trough is an inverted frustum trough, the material delivery port is a circular port, and a hand hole is installed on the top surface of the upper cylinder.
[0010] Preferably, a plurality of mounting grooves are provided on the bottom surface of the material storage rack, and the mounting grooves correspond to the material storage grooves one by one. A through-opening is provided on one side of the mounting groove, and the width of the through-opening is greater than the diameter of the discharge port. A baffle is inserted into the inside of the through-opening, and one end of the baffle is inserted into the positioning slot. The positioning slot is provided on the side wall of the discharge port, and the width of the positioning slot is equal to the width of the through-opening. The other end of the baffle is fixed to the piston rod of the electric push rod, and the electric push rod is fixed inside the mounting groove.
[0011] Preferably, the top surface and the bottom surface of the storage rack are both provided with an embedding groove, an axial hole is provided between the two embedding grooves, the shaft body of the stirring shaft one passes through the axial hole, the outer ring of the bearing is fixed on the side wall of the embedding groove, and the inner ring of the bearing is sleeved and fixed on the shaft body of the stirring shaft one.
[0012] Preferably, a reserved groove is provided on the side wall of the embedding groove, the reserved groove is an annular groove, the driving gear is rotatably connected in the reserved groove, a plurality of reserved openings are provided on the side wall of the reserved groove, the reserved openings correspond one to one with the storage grooves, a guide rail groove is provided on the side wall of the storage groove, the guide rail groove is an annular groove, the reserved openings connect the guide rail groove and the reserved groove, and the outer ring of the swivel is rotatably connected in the guide rail groove.
[0013] Preferably, a limiting shaft is fixed between the top surfaces of the reserved openings, and a transmission gear is sleeved on the shaft body of the limiting shaft. The transmission gear meshes with tooth one, and tooth one is provided with multiple teeth. The multiple teeth one are fixed on the outer ring surface of the rotating ring with equal distances and sizes, and the distribution density of tooth one is less than the distribution density of the teeth of the driving gear.
[0014] Preferably, the swivel is a ring plate structure with a "convex" shaped cross-section, and a plurality of balls are embedded on the outer ring surface of the top plate body and the outer ring surface of the bottom plate body of the swivel, and the balls contact the side wall of the material storage trough. A plurality of connecting rods are provided, and the plurality of connecting rods are distributed in the shape of a "cross" in the inner ring opening of the swivel.
[0015] Preferably, a plurality of elastic hanging pieces are fixed to the bottom surface of the swivel, a rubber connecting block is fixed to the surface of the elastic hanging piece, one side of the rubber connecting block is fixed to the bottom surface of the swivel, a knocking block is fixed to the side of the rubber connecting block close to the side wall of the material storage trough, the knocking block is in the form of an arc-shaped plate, a plurality of limiting protrusions are fixed to the side wall of the material storage trough, the limiting protrusions are in the form of an arc-shaped plate, and the plurality of limiting protrusions are arranged and distributed along the side wall of the material storage trough at equal distances and sizes. During the rotation of the swivel, when the knocking block passes through the plurality of limiting protrusions in sequence and the knocking block and the limiting protrusion are arranged side by side, the elastic hanging piece is stretched to produce elastic deformation. After the limiting protrusion and the knocking block are misaligned, the elastic hanging piece is reset to drive the knocking block to knock on the side wall of the material storage trough.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] The powder mixing device for laser additive manufacturing proposed by the present invention has a plurality of storage troughs inside the storage rack, each storage trough corresponds to a type of powder, and the switch of the baffle is controlled by an electric push rod, so that multiple powders can be easily put in one after another, without the need to frequently open the cylinder cover, simplifying the feeding operation; during the rotation of the rotating ring, the inner wall of the storage trough is knocked by the elastic hanging piece and the knocking block, which effectively reduces the adhesion of the powder on the inner wall and improves the feeding accuracy and mixing effect; the mixing device is flexibly adjusted according to actual needs. For example, the number and position of the storage troughs can be adjusted as needed to meet the mixing needs of different types and quantities of powders. At the same time, the rotation speed of the stirring shaft and the rotating ring can be independently controlled to meet different mixing requirements; the connecting plate realizes the close connection and sealing between the lower cylinder and the upper cylinder through the locking action of the nut and the screw, effectively preventing the leakage and flying of the powder during the mixing process. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the structure of the present invention;
[0019] Figure 2 It is a top view of the structure of the present invention;
[0020] Figure 3 for Figure 2 Structural cross-section at AA in the middle;
[0021] Figure 4 for Figure 3 A schematic diagram of the structure enlargement in the middle;
[0022] Figure 5 for Figure 3A magnified schematic diagram of the structure at B in the middle;
[0023] Figure 6 for Figure 3 A magnified schematic diagram of the structure at C in the middle;
[0024] Figure 7 This is a schematic diagram of the connection structure between the material storage rack and the stirring shaft of the present invention;
[0025] Figure 8 This is a schematic diagram of the structure of the material storage rack of the present invention after being inverted;
[0026] Fig. 9 It is a schematic diagram of the rotating ring structure of the present invention.
[0027] In the figure: lower cylinder 1, upper cylinder 2, bolt hole 3, connecting plate 4, sealing gasket 5, screw 6, nut 7, storage rack 8, weight reduction cavity 9, storage trough 10, guide trough 11, feeding port 12, discharge port 13, installation slot 14, electric push rod 15, baffle 16, through-hole 17, positioning slot 18, hand hole 19, embedded slot 20, shaft hole 21, stirring shaft 12, coupling 23, servo motor 24, bearing 25, reserved slot 26, driving gear 27, guide groove 28, reserved port 29, limit shaft 30, transmission gear 31, swivel 32, tooth 1 33, ball 34, elastic hanging piece 35, knocking block 36, limit protrusion 37, rubber connecting block 38, connecting rod 39, rotating rod 40, spiral material plate 41, ball pulley 42. DETAILED DESCRIPTION
[0028] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0029] See also Figures 1 to 9The present invention provides a technical solution: a powder mixing device for laser additive manufacturing, comprising a lower cylinder 1, an upper cylinder 2 is installed above the lower cylinder 1, the lower cylinder 1 is used to hold powder for laser additive manufacturing, a connecting plate 4 is installed between the lower cylinder 1 and the upper cylinder 2, the top end of the lower cylinder 1 and the bottom end of the upper cylinder 2 are both integrally formed with a connecting plate, a plurality of bolt holes 3 are opened on the surface of the connecting plate, the connecting plate 4 is a ring plate structure with a "T"-shaped cross section, screws 6 are fixed in the upper groove body of the connecting plate 4 and the lower groove body of the connecting plate 4, the screws 6 and the bolt holes 3 correspond one to one, after the screws 6 pass through the bolt holes 3, a nut 7 is threaded on the rod body of the screw 6, a sealing gasket 5 is fixed in the upper groove body of the connecting plate 4 and the lower groove body of the connecting plate 4, after the nut 7 and the screw 6 are locked, the sealing gasket 5 is compressed to produce elastic deformation.
[0030] When in use, when the connecting plate 4 is not installed between the lower cylinder 1 and the upper cylinder 2, the stirring shaft is installed on the bottom end of the shaft of the servo motor 24 through the coupling 23, and then the upper cylinder 2 is overlapped on the lower cylinder 1, and the bolts are passed through the bolt holes 3 at the ends of the lower cylinder 1 and the upper cylinder 2, and the bolts are tightened to complete the fixation of the lower cylinder 1 and the upper cylinder 2. At this time, the stirring shaft installed in cooperation with the lower cylinder 1 and the upper cylinder 2 meets the use requirements of the traditional mixing cylinder, that is, the material is put into the lower cylinder 1 through the hand hole 19 to be mixed by the stirrer; when the connecting plate 4 is installed between the lower cylinder 1 and the upper cylinder 2, the connecting plate 4 is first overlapped on the top of the lower cylinder 1, The screw rod 6 at the bottom of the connecting plate 4 is inserted into the bolt hole 3 at the top of the lower cylinder 1, and then the upper cylinder 2 is overlapped in the top groove of the connecting plate 4. At this time, the screw rod 6 at the top of the connecting plate 4 passes through the bolt hole 3 at the bottom end of the upper cylinder 2, and then the locking nut 7 is screwed on the end of the screw rod 6 to connect the lower cylinder 1 and the upper cylinder 2 at the upper and lower sides of the connecting plate 4, and the sealing gasket 5 is clamped on the upper and lower sides of the connecting plate 4 to achieve sealing after the lower cylinder 1 and the upper cylinder 2 are connected. The connecting plate 4 not only serves as a hanging frame structure installed on the storage rack 8 inside the upper cylinder 2, but also the connecting plate 4 serves as a connecting structure between the lower cylinder 1 and the upper cylinder 2.
[0031] A storage rack 8 is fixed to the inner ring opening of the connecting plate 4, and a weight-reducing cavity 9 is provided inside the storage rack 8. The weight-reducing cavity 9 is in the form of an annular groove, and a plurality of ball pulleys 42 are fixed to the top surface of the storage rack 8. The weight-reducing cavity 9 is provided to reduce the dead weight of the storage rack 8. The purpose of installing a plurality of ball pulleys 42 on the top of the storage rack 8 is that after the connecting plate 4 is removed from between the lower cylinder 1 and the upper cylinder 2, the connecting plate 4 is flipped over until the ball pulley 42 contacts the ground, so as to facilitate the sliding transfer of the storage rack 8.
[0032] The storage rack 8 is provided with a plurality of storage troughs 10 inside, a guide trough 11 is provided on the top surface of the storage rack 8, a feeding port 12 is provided between the guide trough 11 and the storage trough 10, the storage trough 10 is a circular trough, a plurality of storage troughs 10 are provided, and the plurality of storage troughs 10 are distributed in a circle with the stirring shaft 22 as the central axis, the guide trough 11 is an inverted truncated cone trough, the feeding port 12 is a circular mouth, a hand hole 19 is installed on the top surface of the upper cylinder 2, a discharge port 13 is provided on the bottom surface of the storage trough 10, and a plurality of installation ports are provided on the bottom surface of the storage rack 8 Groove 14, the mounting groove 14 and the storage groove 10 correspond one to one, a through-opening 17 is opened on one side of the mounting groove 14, the width of the through-opening 17 is larger than the diameter of the discharge port 13, a baffle 16 is inserted inside the through-opening 17, one end of the baffle 16 is inserted in the positioning slot 18, the positioning slot 18 is opened on the side wall of the discharge port 13, the width of the positioning slot 18 is equal to the width of the through-opening 17, the other end of the baffle 16 is fixed on the piston rod of the electric push rod 15, and the electric push rod 15 is fixed inside the mounting groove 14.
[0033] When in use, various powders for laser additive manufacturing are pre-loaded into multiple material storage troughs 10, that is, when the upper cylinder 2 is not installed on the connecting plate 4, the raw materials are put into the corresponding material guide troughs 11, and the raw materials fall into the material storage troughs 10 through the feeding port 12 for storage. Since the baffle 16 blocks the bottom end of the discharge port 13, the leakage of the raw materials inside the material storage trough 10 is avoided; when the upper cylinder 2 is installed on the top of the connecting plate 4, the hand hole 19 can also be opened, and the raw materials can be put into the material guide troughs 11 below through the hand hole 19. In order to facilitate the feeding of multiple material guide troughs 11, it is necessary to install a material guide trough 11 on the top plate of the upper cylinder 2. There are hand holes 19 of matching number; after the connecting plate 4 is installed between the lower cylinder 1 and the upper cylinder 2, when it is necessary to feed materials into the lower cylinder 1, the switch of the electric push rod 15 corresponding to the bottom of the storage trough 10 is triggered, and the piston rod of the electric push rod 15 is retracted when the piston rod is recovered, and the baffle 16 is pulled into the through-hole 17, and when the baffle 16 no longer blocks the discharge port 13, the raw materials inside the storage trough 10 fall from the discharge port 13, and the electric push rod 15 under the storage trough 10 corresponding to multiple raw materials can be triggered as needed. After the feeding is completed, the electric push rod 15 is started to push the baffle 16 to insert it into the positioning slot 18, so as to achieve the blocking of the discharge port 13.
[0034] The middle part of the material storage rack 8 is rotatably connected with a stirring shaft 22, and an embedding groove 20 is provided on the top surface and the bottom surface of the material storage rack 8, and an axial hole 21 is provided between the two embedding grooves 20, and the shaft body of the stirring shaft 22 passes through the axial hole 21, and the outer ring of the bearing 25 is fixed on the side wall of the embedding groove 20, and the inner ring of the bearing 25 is sleeved and fixed on the shaft body of the stirring shaft 22; the middle part of the material storage rack 8 is rotatably connected with a driving gear 27, and the driving gear 27 meshes with a transmission gear 31, and the transmission gear 31 is rotatably connected to the inside of the material storage rack 8, and the transmission gear 31 meshes with a swivel 32, and the swivel 32 is rotatably connected to the side wall of the material storage tank 10, and a reserved groove 26 is provided on the side wall of the embedding groove 20, and the reserved groove 26 is an annular groove, and the driving gear 27 is engaged with a transmission gear 31. The transmission gear 31 is rotatably connected to the inside of the material storage rack 8, and the transmission gear 31 meshes with a swivel 32, and the swivel 32 is rotatably connected to the side wall of the material storage tank 10. The wheel 27 is rotatably connected in the reserved groove 26, and a plurality of reserved openings 29 are provided on the side wall of the reserved groove 26. The reserved openings 29 correspond to the storage trough 10 one by one. A guide rail groove 28 is provided on the side wall of the storage trough 10. The guide rail groove 28 is an annular groove. The reserved opening 29 connects the guide rail groove 28 and the reserved groove 26. The outer ring of the swivel 32 is rotatably connected in the guide rail groove 28. A limit shaft 30 is fixed between the top surface of the reserved opening 29 and the top surface of the reserved opening 29. A transmission gear 31 is sleeved on the shaft body of the limit shaft 30. The transmission gear 31 meshes with teeth 33. There are a plurality of teeth 33, and the plurality of teeth 33 are fixed on the outer ring surface of the swivel 32 at equal distances and sizes. The distribution density of teeth 33 is less than the distribution density of teeth of the driving gear 27.
[0035] A connecting rod 39 is fixed to the inner ring surface of the swivel 32, and one end of the connecting rod 39 is fixed to the surface of the rotating rod 40. The swivel 32 is a ring plate structure with a "convex" shaped cross section. A plurality of balls 34 are embedded on the outer ring surface of the top plate body of the swivel 32 and the outer ring surface of the bottom plate body of the swivel 32. The balls 34 contact the side wall of the storage tank 10. There are multiple connecting rods 39, and the multiple connecting rods 39 are distributed in the inner ring opening of the swivel 32 in a "cross" shape. Both ends of the rotating rod 40 are provided with spiral material plates 41, and the two groups of spiral material plates 41 extend into the guide groove 11 and the discharge port 13 respectively. The top end of the stirring shaft 22 is fixed to the bottom end of the shaft body of the servo motor 24 through a coupling, and the servo motor 24 is fixed to the top surface of the upper cylinder 2; the bottom surface of the swivel 32 is fixed with a plurality of elastic The hanging piece 35, a rubber connecting block 38 is fixed on the surface of the elastic hanging piece 35, one side of the rubber connecting block 38 is fixed to the bottom surface of the rotating ring 32, and a knocking block 36 is fixed on the side of the rubber connecting block 38 close to the side wall of the storage trough 10, the knocking block 36 is an arc-shaped plate, and the side wall of the storage trough 10 is fixed with a plurality of limiting protrusions 37, the limiting protrusions 37 are arc-shaped plates, and the plurality of limiting protrusions 37 are arranged and distributed along the side wall of the storage trough 10 at equal distances and sizes. During the rotation of the rotating ring 32, when the knocking block 36 passes through the plurality of limiting protrusions 37 in sequence, when the knocking block 36 and the limiting protrusion 37 are side by side, the elastic hanging piece 35 is stretched to produce elastic deformation, and after the limiting protrusion 37 and the knocking block 36 are misaligned, the elastic hanging piece 35 is reset to drive the knocking block 36 to knock on the side wall of the storage trough 10.
[0036] When in use, when the material storage trough 10 is feeding into the lower cylinder 1, the switch of the servo motor 24 is triggered, and the servo motor 24 drives the stirring shaft 22 to rotate, and the stirring shaft 22 drives the driving gear 27 to rotate synchronously, and the driving gear 27 meshes with the transmission gear 31 to rotate, and the transmission gear 31 meshes with the tooth 33 and then drives the rotating ring 32 to rotate. Due to the existence of the transmission gear 31, the rotation speed of the rotating ring 32 and the driving gear 27 is different. The stirring shaft 22 rotates quickly to achieve mixing of the powder inside the lower cylinder 1. When the rotating ring 32 is driven to rotate slowly, the rotating ring 32 not only drives the elastic hanging piece 35 to rotate synchronously, but also the elastic hanging piece 35 passes through a plurality of limiting protrusions 37 in turn to knock on the inner wall of the material storage trough 10, so as to avoid the problem of powder adhering to the inner wall when the material storage trough 10 is unloaded. At the same time, when the rotating ring 32 rotates, it drives the rotating rod 40 to rotate through the connecting rod 39. When the rotating rod 40 rotates, when the inner wall of the guide trough 11 is When powder is added from the top, the rotating rod 40 rotates to cooperate with the spiral material plate 41 at the top to transport the powder at the feeding port 12 and the bottom of the guide trough 11 to the storage trough 10; when the discharge port 13 is used to feed materials into the lower cylinder 1, the spiral material plate 41 at the bottom of the rotating rod 40 guides the powder inside the discharge port 13 downward; as needed, the conveying direction of the spiral material plate 41 at the bottom of the rotating rod 40 can also be reversed, that is, when the stirring shaft 22 stirs the powder inside the lower cylinder 1, the rotating rod 40 is driven to drive the spiral material plate 41 at the bottom to stir the material inside the storage trough 10 to prevent the powder from settling and agglomerating. It should be noted that when the storage trough 10 is fed downward through the discharge port 13, the servo motor 24 needs to be turned off to prevent the rotating rod 40 from rotating, and a gap is left between the spiral material plate 41 and the discharge port 13 to enable the storage trough 10 to feed downward through the discharge port 13. This material turning form is selected and adjusted according to actual needs.
[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A powder mixing device for laser additive manufacturing, comprising a lower cylinder (1), an upper cylinder (2) being mounted above the lower cylinder (1), the lower cylinder (1) being used to contain powder for laser additive manufacturing, and characterized in that: A connecting plate (4) is installed between the lower cylinder (1) and the upper cylinder (2), a material storage rack (8) is fixed to the inner ring of the connecting plate (4), a plurality of material storage troughs (10) are arranged inside the material storage rack (8), a material guide trough (11) is provided on the top surface of the material storage rack (8), a material delivery port (12) is provided between the material guide trough (11) and the material storage trough (10), a material discharge port (13) is provided on the bottom surface of the material storage trough (10), a stirring shaft (22) is rotatably connected to the middle of the material storage rack (8), a driving gear (27) is rotatably connected to the middle of the material storage rack (8), the driving gear (27) meshes with a transmission gear (31), and the transmission gear (3 1) is rotatably connected to the inside of the material storage rack (8), and the transmission gear (31) is meshed with the rotating ring (32), the rotating ring (32) is rotatably connected to the side wall of the material storage tank (10), a connecting rod (39) is fixed to the inner ring surface of the rotating ring (32), one end of the connecting rod (39) is fixed to the surface of the rotating rod (40), both ends of the rotating rod (40) are provided with spiral material plates (41), two sets of spiral material plates (41) extend into the material guide trough (11) and the discharge port (13) respectively, the top end of the stirring shaft (22) is fixed to the bottom end of the shaft body of the servo motor (24) through a coupling, and the servo motor (24) is fixed to the top surface of the upper cylinder (2); The material storage trough (10) is in the form of a circular trough. A plurality of material storage troughs (10) are provided. The plurality of material storage troughs (10) are distributed in a circle with the stirring shaft (22) as the central axis. The material guide trough (11) is in the form of an inverted truncated cone trough. The material delivery port (12) is in the form of a circular opening. A hand hole (19) is installed on the top surface of the upper cylinder (2). A plurality of installation grooves (14) are provided on the bottom surface of the material storage rack (8). The installation grooves (14) correspond to the material storage troughs (10) one by one. A through opening ( 17, the width of the through-opening (17) is greater than the diameter of the discharge opening (13), a baffle (16) is inserted into the interior of the through-opening (17), one end of the baffle (16) is inserted into a positioning slot (18), the positioning slot (18) is opened on the side wall of the discharge opening (13), the width of the positioning slot (18) is equal to the width of the through-opening (17), the other end of the baffle (16) is fixed to the piston rod of the electric push rod (15), and the electric push rod (15) is fixed to the mounting groove (14). Inside; a plurality of elastic hanging pieces (35) are fixed to the bottom surface of the rotating ring (32); a rubber connecting piece (38) is fixed to the surface of the elastic hanging piece (35); one side of the rubber connecting piece (38) is fixed to the bottom surface of the rotating ring (32); a knocking block (36) is fixed to the side of the rubber connecting piece (38) close to the side wall of the material storage trough (10); the knocking block (36) is an arc-shaped plate; a plurality of limiting protrusions (37) are fixed to the side wall of the material storage trough (10); the limiting protrusions (37) are arc-shaped plates The plurality of limiting protrusions (37) are arranged and distributed at equal distances and in equal sizes along the side wall of the material storage trough (10). When the rotating ring (32) rotates, the striking block (36) passes through the plurality of limiting protrusions (37) in sequence. When the striking block (36) and the limiting protrusion (37) are arranged side by side, the elastic hanging piece (35) is stretched to produce elastic deformation. After the limiting protrusion (37) and the striking block (36) are misaligned, the elastic hanging piece (35) is reset to drive the striking block (36) to strike the side wall of the material storage trough (10).
2. The powder mixing device for laser additive manufacturing according to claim 1, characterized in that: The top end of the lower cylinder (1) and the bottom end of the upper cylinder (2) are both integrally formed with a connecting plate, a plurality of bolt holes (3) are provided on the surface of the connecting plate, the connecting plate (4) is a ring plate structure with a "T"-shaped cross section, a screw rod (6) is fixed in the upper groove body of the connecting plate (4) and the lower groove body of the connecting plate (4), the screw rod (6) and the bolt hole (3) correspond one to one, after the screw rod (6) passes through the bolt hole (3), a nut (7) is sleeved on the rod body of the screw rod (6), a sealing gasket (5) is fixed in the upper groove body of the connecting plate (4) and the lower groove body of the connecting plate (4), after the nut (7) and the screw rod (6) are locked, the sealing gasket (5) is compressed to produce elastic deformation.
3. The powder mixing device for laser additive manufacturing according to claim 1, characterized in that: A weight-reducing cavity (9) is provided inside the material storage rack (8), and the weight-reducing cavity (9) is in the form of an annular groove. A plurality of ball pulleys (42) are fixed to the top surface of the material storage rack (8).
4. The powder mixing device for laser additive manufacturing according to claim 1, characterized in that: The top surface of the material storage rack (8) and the bottom surface of the material storage rack (8) are both provided with an embedding groove (20), an axial hole (21) is provided between the two embedding grooves (20), the shaft body of the stirring shaft (22) passes through the axial hole (21), the outer ring of the bearing (25) is fixed on the side wall of the embedding groove (20), and the inner ring of the bearing (25) is sleeved and fixed on the shaft body of the stirring shaft (22).
5. The powder mixing device for laser additive manufacturing according to claim 4, characterized in that: A reserved groove (26) is provided on the side wall of the embedding groove (20), the reserved groove (26) is an annular groove, the driving gear (27) is rotatably connected in the reserved groove (26), a plurality of reserved openings (29) are provided on the side wall of the reserved groove (26), the reserved openings (29) and the material storage groove (10) correspond one to one, a guide rail groove (28) is provided on the side wall of the material storage groove (10), the guide rail groove (28) is an annular groove, the reserved openings (29) communicate with the guide rail groove (28) and the reserved groove (26), and the outer ring of the rotating ring (32) is rotatably connected in the guide rail groove (28).
6. The powder mixing device for laser additive manufacturing according to claim 5, characterized in that: A limiting shaft (30) is fixed between the top surface of the reserved opening (29) and the top surface of the reserved opening (29). A transmission gear (31) is sleeved on the shaft body of the limiting shaft (30). The transmission gear (31) meshes with a tooth one (33). The tooth one (33) is provided with a plurality of teeth. The plurality of teeth one (33) are fixed on the outer ring surface of the rotating ring (32) at equal distances and in equal sizes. The distribution density of the teeth one (33) is less than the distribution density of the teeth of the driving gear (27).
7. The powder mixing device for laser additive manufacturing according to claim 1, characterized in that: The rotating ring (32) is a ring plate structure with a "convex" shaped cross section. A plurality of balls (34) are embedded on the outer ring surface of the top plate body of the rotating ring (32) and the outer ring surface of the bottom plate body of the rotating ring (32). The balls (34) contact the side wall of the material storage tank (10). A plurality of connecting rods (39) are provided. The plurality of connecting rods (39) are distributed in the shape of a "cross" in the inner ring opening of the rotating ring (32).