CN116985400A - Laser material-increasing powder feeding equipment - Google Patents
Laser material-increasing powder feeding equipment Download PDFInfo
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- CN116985400A CN116985400A CN202310825136.5A CN202310825136A CN116985400A CN 116985400 A CN116985400 A CN 116985400A CN 202310825136 A CN202310825136 A CN 202310825136A CN 116985400 A CN116985400 A CN 116985400A
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- 239000000843 powder Substances 0.000 title claims abstract description 573
- 238000005303 weighing Methods 0.000 claims abstract description 135
- 238000007789 sealing Methods 0.000 claims description 64
- 238000003860 storage Methods 0.000 claims description 38
- 238000003756 stirring Methods 0.000 claims description 22
- 239000000654 additive Substances 0.000 claims description 15
- 230000000996 additive effect Effects 0.000 claims description 15
- 230000009471 action Effects 0.000 claims description 12
- 230000005484 gravity Effects 0.000 claims description 8
- 239000011812 mixed powder Substances 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 6
- 230000035939 shock Effects 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 22
- 230000000694 effects Effects 0.000 description 18
- 239000007789 gas Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 239000012159 carrier gas Substances 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 206010020649 Hyperkeratosis Diseases 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/321—Feeding
- B29C64/329—Feeding using hoppers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/321—Feeding
- B29C64/336—Feeding of two or more materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/343—Metering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The invention discloses laser material-increasing and powder-feeding equipment, relates to the technical field of laser material-increasing, and is used for realizing on-line weighing and real-time adjustment of multiple paths of powder and improving material-increasing efficiency. The laser material-increasing powder-feeding device comprises a bearing frame, a powder supply unit, a powder weighing unit, a powder mixing unit and a control system, wherein the powder supply unit supplies at least two kinds of powder. The powder weighing unit is communicated with the powder supply unit and is used for receiving the powder and weighing the powder respectively. The powder mixing unit is communicated with the powder weighing unit and is used for receiving, mixing and outputting at least two kinds of powder. The control system is electrically connected with the powder supply unit and is used for controlling the powder supply unit to start or stop supplying powder. The control system is electrically connected with the powder weighing unit and is used for receiving a weight signal of the powder, and when the weight of any one of the powder reaches a preset value, the control system controls the powder supply unit to stop the supply of the powder. The control system is electrically connected with the powder mixing unit and is used for controlling the powder mixing unit to start or stop mixing powder and controlling the powder mixing unit to output the powder.
Description
Technical Field
The invention relates to the technical field of laser material increase, in particular to laser material increase powder feeding equipment.
Background
The laser material-increasing technology is a processing method for carrying out workpiece surface modification or material-increasing manufacturing by using laser as a heat source, when the material to be material-increasing is a plurality of powders, the particle sizes, the densities, the shapes and the like of the different types of powders are different, and how to realize quantitative conveying and uniform mixing of the plurality of powders faces a great challenge.
In the prior art, an off-line stirring and mixing method is generally adopted for mixing various powders, and the method mainly utilizes a manual stirring or machine stirring mode to mix and stir the various powders which are weighed in advance respectively, but the method influences the efficiency of additive manufacturing.
Disclosure of Invention
The invention aims to provide laser material-increasing powder-feeding equipment which is used for realizing on-line weighing and real-time adjustment of multiple paths of powder and improving material-increasing efficiency.
In order to achieve the above purpose, the invention provides laser material-increasing powder feeding equipment, which comprises a bearing frame, a powder supply unit, a powder weighing unit, a powder mixing unit and a control system, wherein the powder supply unit is arranged on the bearing frame and is used for supplying at least two kinds of powder under the action of gravity. The powder weighing unit is arranged on the bearing frame, is communicated with the powder supply unit and is used for receiving powder and respectively weighing the weight of at least two received powders. The powder mixing unit is communicated with the powder weighing unit and is used for receiving and mixing at least two kinds of powder weighed by the powder weighing unit and outputting the powder. The control system is electrically connected with the powder supply unit and is used for controlling the powder supply unit to start or stop supplying powder. The control system is electrically connected with the powder weighing unit and is used for receiving weight signals of at least two kinds of powder weighed by the powder weighing unit respectively, and when the weight of any one of the powder weighed by the powder weighing unit reaches a preset value, the control system controls the powder supply unit to stop the supply of the powder. The control system is also electrically connected with the powder mixing unit and is used for controlling the powder mixing unit to start or stop mixing at least two kinds of powder and controlling the powder mixing unit to output the mixed powder.
Under the condition of adopting the technical scheme, the laser material-increasing powder-feeding equipment provided by the invention comprises a bearing frame, a powder-feeding unit, a powder-weighing unit, a powder-mixing unit and a control system, wherein the powder-feeding unit is used for feeding at least two kinds of powder under the action of gravity, the powder fed by the powder-feeding unit is received by the powder-weighing unit, the powder-weighing unit respectively and real-timely weighs the received at least two kinds of powder, the weighed weight signals of each kind of powder are transmitted to the control system, when the weight of any kind of powder received by the control system reaches a preset value, the control system controls the powder-feeding unit to stop feeding the powder, so that under the control of the control system on the powder-feeding unit and the powder-weighing unit, the on-line weighing and real-time adjustment of at least two kinds of powder can be realized, the weight of each kind of powder can be accurately controlled, the proportion of powder can be adjusted in real time, and the material-increasing manufacturing effect can be improved. When the weight of each powder received by the control system reaches a preset value, the powder weighing unit conveys the weighed powder to the powder mixing unit, and the control system controls the powder mixing unit to mix at least two kinds of powder. And then, the control system controls the powder mixing unit to convey the mixed powder according to actual requirements. By adopting the laser material-increasing powder-feeding equipment provided by the invention, on one hand, the powder supply unit and the powder weighing unit can synchronously supply and weigh various kinds of powder, and compared with the respective weighing of various kinds of powder in the prior art, the efficiency of material-increasing manufacturing can be improved; on the other hand, after the powder mixing unit receives the powder conveyed by the powder weighing unit, when the powder mixing unit mixes the powder or outputs the powder, the powder supplying unit and the powder weighing unit can synchronously supply and weigh the powder, so that the supply of the powder is ensured, and further, the efficiency of additive manufacturing is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is a schematic structural diagram of a laser additive powder feeding device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a powder feeding unit according to an embodiment of the present invention;
FIG. 3 is a schematic partial cross-sectional view of a powder feeding unit according to an embodiment of the present invention;
FIG. 4 is a schematic partial cross-sectional view of a powder feeding unit according to an embodiment of the present invention;
FIG. 5 is a schematic view of the positional relationship between a pressing assembly and a collar according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a vibrating powder feeding assembly according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a powder weighing assembly according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a powder mixing unit according to an embodiment of the present invention;
fig. 9 is a schematic structural view of an air inlet pipe according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of an air outlet pipe according to an embodiment of the present invention.
Reference numerals:
1-a bearing frame, 11-a powder feeding platform, 12-a powder mixing platform, 2-a powder supply unit, 21-a powder storage cylinder,
211-collar, 22-first housing, 221-first cavity, 222-first stop,
23, sealing valve cap, 24, second shell, 241, supporting column, 242, powder falling nozzle,
25-vibrating powder feeding component, 251-vibrating groove, 252-vibrator, 26-pressing component,
261-supporting frame, 262-fastener, 263-second spring, 27-guide rod, 28-first spring,
3-powder weighing unit, 31-hopper, 32-weighing device, 4-powder mixing unit, 41-powder mixing tank,
42-stirring assembly, 421-driving motor, 422-fan blade, 43-air intake assembly,
431-an air inlet pipe, 4311-a blowing hole, 432-a first control valve, 433-a flowmeter,
44-an air outlet component, 441-an air outlet pipe, 4411-an air outlet hole, 442-a second control valve,
45-rotation assembly 451-driving piece, 452-driving gear, 453-driven gear.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The meaning of "a number" is one or more than one unless specifically defined otherwise.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1, an embodiment of the present invention provides a laser additive powder feeding device, which includes a carrier 1, a powder feeding unit 2, a powder weighing unit 3, a powder mixing unit 4 and a control system, wherein the powder feeding unit 2 is disposed on the carrier 1, and the powder feeding unit 2 is used for feeding at least two kinds of powder by gravity. The powder weighing unit 3 is arranged on the bearing frame 1, and the powder weighing unit 3 is communicated with the powder supply unit 2 and is used for receiving powder and respectively weighing at least two kinds of received powder. The powder mixing unit 4 is communicated with the powder weighing unit 3 and is used for receiving, mixing and outputting at least two kinds of powder weighed by the powder weighing unit 3. The control system is electrically connected with the powder supply unit 2 and is used for controlling the powder supply unit 2 to start or stop supplying powder. The control system is electrically connected with the powder weighing unit 3 and is used for receiving weight signals of at least two kinds of powder respectively weighed by the powder weighing unit 3, and when the weight of any one of the powder weighed by the powder weighing unit 3 reaches a preset value, the control system controls the powder supply unit 2 to stop the supply of the powder. The control system is also electrically connected with the powder mixing unit 4 and is used for controlling the powder mixing unit 4 to start or stop mixing at least two kinds of powder and controlling the powder mixing unit 4 to output the mixed powder.
Under the condition of adopting the technical scheme, the laser material-increasing powder-feeding equipment provided by the embodiment of the invention comprises the bearing frame 1, the powder supply unit 2, the powder weighing unit 3, the powder mixing unit 4 and the control system, wherein the powder supply unit 2 is used for supplying at least two kinds of powder under the action of gravity, the powder supplied by the powder supply unit 2 is received by the powder weighing unit 3, the powder weighing units 3 respectively weigh the received at least two kinds of powder in real time, that is, the powder weighing unit 3 receives the at least two kinds of powder provided by the powder supply unit 2 and simultaneously weigh the received at least two kinds of powder, and transmits a weighed weight signal of each kind of powder to the control system, and when the weight of any one kind of powder received by the control system reaches a preset value, the control system controls the powder supply unit 2 to stop the supply of the powder, so that under the control of the control system on-line weighing and real-time adjustment of the at least two kinds of powder can be realized, the weight of each kind of powder can be independently controlled according to the preset value, the weight of each kind of powder can be controlled, the weight of the manufactured powder can be accurately adjusted, and the weight ratio of the powder can be increased in real time. When the weight of each powder received by the control system reaches a preset value, the powder weighing unit 3 conveys the weighed powder to the powder mixing unit 4, and the control system controls the powder mixing unit 4 to mix at least two kinds of powder. And then, the control system controls the powder mixing unit 4 to convey the mixed powder according to actual requirements. By adopting the laser material-increasing powder-feeding equipment provided by the embodiment of the invention, on one hand, the powder supply unit 2 and the powder weighing unit 3 can synchronously supply and weigh various kinds of powder, and compared with the respective weighing of various kinds of powder in the prior art, the efficiency of material-increasing manufacturing can be improved; on the other hand, after the powder mixing unit 4 receives the powder conveyed by the powder weighing unit 3, when the powder mixing unit 4 mixes the powder or outputs the powder, the powder supply unit 2 and the powder weighing unit 3 can synchronously supply and weigh the powder, so that the powder supply is ensured, and further, the efficiency of additive manufacturing is improved.
In particular, the powder supply unit 2 may supply at least two kinds of powder simultaneously, and the number of kinds of powder supplied by the powder supply unit 2 is not particularly limited herein, and may be set according to actual conditions, and for example, the powder supply unit 2 may supply two, three, four or more kinds of powder simultaneously, and may be selectively set with a cladding material as actually needed. The weighing unit 3 receives a plurality of powders supplied from the powder supply unit 2, respectively weighs the plurality of powders, and transmits the weight of each weighed powder to the control system in a signal manner, the control system compares the received weight signal with a corresponding preset value of each powder, and when the weight of any one of the powders reaches the preset value, the control system controls the powder supply unit 2 to stop the supply of the powder according to the increase of the amount of the powder received by the powder weighing unit 3, so that the supply amount of each powder can be accurately controlled.
In one possible implementation, as shown in fig. 2 to 7, the powder supply unit 2 includes at least two powder storage cylinders 21, a sealing valve cap 23, a second housing 24 and a vibrating powder feeding assembly 25, the powder storage cylinders 21 are used for storing powder, the outlet ends of the powder storage cylinders 21 are connected with a first housing 22, the first housing 22 has a first end and a second end which are oppositely arranged, the first end is connected to the outlet end of the powder storage cylinders 21, the first housing 22 has a first cavity 221 which is communicated from the first end to the second end, and the outlet end of the powder storage cylinders 21 is communicated with the first cavity 221 so as to facilitate the material contained in the powder storage cylinders 21 to be conveyed to the first cavity 221 through the outlet end. The sealing valve cap 23 is arranged in the first cavity 221, the sealing valve cap 23 is provided with a third end and a fourth end which are oppositely arranged, a limiting surface is arranged at the position, close to the second end, of the inner wall of the first cavity 221, and the limiting surface is used for preventing the sealing valve cap 23 from falling off from the second end, so that the sealing valve cap 23 is limited in the first cavity 221. The sealing bonnet 23 has a sealing position and a releasing position relative to the first housing 22, and when the sealing bonnet 23 is supported on the limiting surface, the sealing bonnet 23 is in the sealing position, and the fourth end of the sealing bonnet 23 is in sealing contact with the limiting surface, at this time, the material in the first cavity 221 can be prevented from flowing out through the second end. When the sealing bonnet 23 is separated from the limiting surface, the sealing bonnet 23 is in a release position.
Meanwhile, a first limiting frame 222 is arranged in the first shell 22, a limiting hole matched with a third end is formed in the first limiting frame 222, and the third end movably penetrates through the limiting hole. The second casing 24 is arranged on the bearing frame 1, the second casing 24 is sleeved outside the first casing 22, a bearing column 241 is arranged in the second casing 24, and the bearing column 241 is used for bearing and jacking the sealing valve cap 23, so that the sealing valve cap 23 is in a release position. When the second shell 24 is sleeved outside the first shell 22, the bearing column 241 arranged in the second shell 24 can jack up the sealing valve cap 23 in a bearing manner, so that the sealing valve cap 23 is separated from contact with the limiting surface, materials in the first cavity 221 are output through the second end, and conveying of the materials is achieved. The end of the second housing 24 remote from the powder storage cylinder 21 is provided with a powder discharge nozzle 242. The vibratory powder feeding assembly 25 includes at least two vibratory grooves 251 and at least two vibrators 252, the vibratory grooves 251 being in communication with the powder discharge nozzle 242, each vibratory groove 251 for receiving one of the powders. The vibrator 252 is arranged on the powder feeding platform 11 of the bearing frame 1, the vibration groove 251 is fixedly arranged on the vibrator 252, the vibrator 252 controls the corresponding vibration groove 251 to vibrate, so that powder received by the vibration groove 251 falls from one end of the vibration groove 251, and the control system is electrically connected with the vibrator 252 and is used for controlling the starting and stopping of the vibration groove 251 and controlling the vibration frequency of the vibration groove.
In particular, the number of the vibration grooves 251, the vibrator 252, the powder storage tube 21, the sealing bonnet 23, and the second housing 24 is the same as the type of powder, and corresponds to one. The vibration groove 251 is located right below the powder falling nozzle 242, the vibration groove 251 is used for receiving the powder sent out by the corresponding powder falling nozzle 242, and the vibrator 252 is used for controlling the vibration of the corresponding vibration groove 251. The powder dropping nozzle 242 may be a cylinder with an inner diameter of 10mm, and when the inner diameter of the powder dropping nozzle 242 is too large, the powder dropping speed is too high, which may cause the vibration groove 251 to be excessively stressed. The outlet shape of the powder falling nozzle 242 is consistent with the shape of the inner wall of the vibration groove 251, the shape of the powder falling nozzle is V-shaped, and the adoption of the V-shaped vibration groove 251 can improve the convergence of the powder and the precision of powder feeding. Meanwhile, the distance between the outlet end of the powder falling nozzle 242 and the vibration groove 251 can be 5mm-10mm, so that the vibration groove 251 cannot vibrate due to the fact that the distance is too small, the powder falling amount is too large, the powder in the vibration groove 251 overflows from the side wall of the vibration groove, and meanwhile, when the weight value of the powder weighed by the powder weighing unit 3 at the rear section reaches a preset value, the timeliness of stopping the powder feeding Fan Yuan is weakened and the response is not timely.
In the embodiment provided by the invention, the first limiting frame 222 is provided with the limiting hole matched with the third end, the third end movably penetrates through the limiting hole, and when the sealing valve cap 23 is switched between the sealing position and the releasing position, namely, the sealing valve cap 23 moves towards the direction approaching to and away from the second end, the sealing valve cap 23 can move along the axial direction of the limiting hole, and the sealing valve cap 23 is matched with the limiting hole, so that the movement of the sealing valve cap 23 is stably guided.
As shown in fig. 4, the sealing bonnet 23 may have a cylindrical structure, a third end of the sealing bonnet 23 is provided with a guide rod 27, one end of the guide rod 27 away from the third end movably passes through the limiting hole, and the diameter of the guide rod 27 is smaller than the outer diameter of the sealing bonnet 23. The guide rod 27 is sleeved with a first spring 28, and two ends of the first spring 28 elastically act on the first limiting frame 222 and the third end of the sealing valve cap 23 respectively and are used for applying acting force close to the limiting surface to the sealing valve cap 23. Thus, when the first housing 22 is removed from the second housing 24, the sealing bonnet 23 is disengaged from the support column 241, the first spring 28 can urge the sealing bonnet 23 to move in a direction toward the second end of the first housing 22, so that the sealing bonnet 23 is in sealing contact with the limiting surface, sealing performance between the sealing bonnet 23 and the limiting surface is improved, and leakage of materials is avoided.
When the powder storage cylinder 21 is required to be disassembled in practical application, the powder storage cylinder 21 and the first shell 22 can be directly taken down from the second shell 24, when the supporting column 241 is separated from the contact with the sealing valve cap 23, the sealing valve cap 23 moves towards the direction close to the second end under the action of self gravity and the first spring 28, the sealing valve cap 23 is supported by the limiting surface, the sealing valve cap 23 is switched from the release position to the sealing position, and the fourth end of the sealing valve cap 23 is in sealing contact with the limiting surface, so that materials are blocked and limited in the first cavity 221, the material can be prevented from being scattered, and the waste of the materials is avoided. Thus, the residual powder in the powder storage cylinder 21 cannot leak out, and the recycling of the residual materials in the powder storage cylinder 21 is facilitated. When the powder storage barrel 21 is installed after the materials are filled, the materials cannot be scattered from the powder storage barrel 21, and the powder storage barrel 21 is convenient and reliable to install. When the powder storage cylinder 21 is installed, the first shell 22 is directly sleeved in the second shell 24, at this time, the bearing column 241 props up the sealing valve cap 23 in a bearing manner, so that the sealing valve cap 23 is separated from the limiting surface, and the sealing valve cap 23 is in a release position, thereby realizing object conveying. Therefore, the powder supply unit 2 provided by the embodiment of the invention can realize the quick assembly and disassembly of the powder storage cylinder 21 to supplement materials, and can avoid the scattering of the materials and save the cost while improving the assembly and disassembly efficiency of the powder storage cylinder 21.
Illustratively, vibrator 252 is an electromagnetic vibrator. The electromagnetic vibrator has a power of 15W, a load of 1.5 kg, an amplitude of 1.0mm, a conveying distance of 250mm, a length of the vibration groove 251 controlled within 250mm, and other electromagnetic vibrators with different specifications can be selected for different application occasions. The vibration frequency of the vibrator 252 determines the amount of powder fed in real time, and the vibration frequency and time of the vibrator 252 are controlled by a programmable control system.
In one example, as shown in fig. 2 to 5, the outer wall of the powder storage barrel 21 is provided with a collar 211, and the powder supply unit 2 further comprises a pressing assembly 26 arranged on the carrier 1, wherein the pressing assembly 26 cooperates with the collar 211 to press and limit the powder storage barrel 21 on the carrier 1. So, when carrying out powder and carrying, store up powder section of thick bamboo 21 and install on bearing frame 1 through first casing 22 and second casing 24, press the subassembly 26 through rand 211 press the limit and be located bearing frame 1, can promote the fastness that store up powder section of thick bamboo 21 set up on bearing frame 1, avoid storing up powder section of thick bamboo 21 and appear rocking, the position takes place the skew, is favorable to the stable transport of powder.
Specifically, the pressing assembly 26 includes a supporting frame 261, a buckle 262 and a second spring 263, the supporting frame 261 is fixedly disposed on the carrier 1, the buckle 262 is movably disposed on the supporting frame 261, two ends of the second spring 263 respectively elastically act on the buckle 262 and the carrier 1, and one end of the buckle 262 close to the powder storage barrel 21 is pressed on the collar 211. As shown in fig. 5, the support may include two opposite support plates, and one end of the buckle 262 is rotatably disposed on the two support plates. The second spring 263 is in a stretched state, one end of the second spring 263 is connected to the carrier 1, and the other end of the second spring 263 is connected to the buckle 262. In the process of installing the powder storage barrel 21 on the bearing frame 1, the clamping ring 211 is in contact with the clamping ring 262, and the clamping ring 262 is pressed, so that one end of the clamping ring 262, which is close to the powder storage barrel 21, rotates in the direction of being close to the bearing frame 1, the powder storage barrel 21 continues to move in the direction of being close to the bearing frame 1, and the clamping ring 262 is further pressed until the second shell 24 is sleeved outside the first shell 22, one end of the clamping ring 262, which is close to the powder storage barrel 21, is positioned on one side, which is far away from the bearing frame 1, of the clamping ring 211, and is pressed on the clamping ring 211 under the action of the second spring 263, so that the powder storage barrel 21 is firmly locked, and rebound escape of the clamping ring 262 is avoided.
Alternatively, the vibratory powder feeding assembly 25 further includes a vibration-absorbing elastic member disposed between the corresponding vibrator 252 and the carrier 1. Each vibrator 252 is correspondingly provided with a damping elastic member to reduce interference to the powder feeding platform 11 of the bearing frame 1 caused by vibration of the vibrator 252. Specifically, the damping elastic piece can be a pressure spring foot pad or a rubber soft rubber pad. The pressure spring callus on sole or rubber soft rubber pad's simple structure and shock attenuation effect are better, can guarantee the reducing effect of shock attenuation elastic component to the interference between vibrator 252 and the powder feeding platform 11.
As an alternative, the powder weighing unit 3 includes at least two weighing hoppers 31 and at least two weighing devices 32, the weighing hoppers 31 are fixedly connected with the corresponding weighing devices 32, the weighing hoppers 31 are disposed below the powder supply unit 2, each weighing hopper 31 is used for receiving one of the powders conveyed by the powder supply unit 2, and the weighing devices 32 are disposed on the carrier 1 and are used for weighing the powder in the weighing hoppers 31. The control system is electrically connected with the weighing device 32 and is used for receiving the electric signal transmitted by the weighing device 32 and controlling the start and stop of the vibrator 252 of the powder supply unit 2 and the powder supply frequency of the powder supply unit.
Specifically, the weighing hoppers 31, the weighing devices 32 are the same in the number of kinds of powder and are in one-to-one correspondence. As shown in fig. 6 and 7, in the embodiment provided by the present invention, the number of weighing hoppers 31, the number of weighing devices 32, the number of vibration tanks 251 and the number of vibrators 252 are six, and one powder storage barrel 21 corresponds to one vibration tank 251, one vibrator 252, one weighing hopper 31 and one weighing device 32, respectively, so that the number of powder storage barrels 21 is six. In the powder feeding process of additive manufacturing, firstly, the preset powder weight required to be received by each weighing hopper 31 is stored in a control system according to the proportion of each path of powder, after the powder in the powder storage barrel 21 is firstly conveyed into the vibration groove 251, the control system controls the vibrator 252 to vibrate at a higher vibration frequency, so that the vibration groove 251 vibrates with the vibration frequency, the powder is driven to vibrate to enable the powder to gradually fall into the corresponding weighing hopper 31 from one end of the vibration groove 251, at the moment, the powder feeding speed is high, but the precision is low, the weighing device 32 weighs the weight of the powder in the weighing hopper 31 in real time and transmits a powder weight signal to the control system, when the weight of the powder in a certain weighing hopper 31 is close to the preset powder weight of the weighing hopper 31, and when the weight of the powder in the weighing hopper 31 is 90% of the preset powder weight of the weighing hopper 31, the control system controls the corresponding vibrator 252 to vibrate at a lower vibration frequency, and then the vibration frequency of the corresponding vibration groove 251 is slowed down, so that the powder flowing speed is reduced, and the rest of the preset powder weight of the weighing hopper 31 is finished, but the powder feeding speed is low, but the precision is high. When the weight of the powder in a certain weighing hopper 31 is equal to the preset powder weight of the weighing hopper 31, the control system controls the corresponding vibrator 252 to stop vibrating until all the powder weights in all the weighing hoppers 31 reach the corresponding preset powder weights, the powder in all the weighing hoppers 31 is circulated into the powder mixing unit 4, and then the steps are repeated to perform a new round of powder feeding and weighing.
Through the structure and implementation process of the vibrating powder feeding assembly 25 and the powder weighing unit 3, the vibrator 252 drives the vibrating groove 251 to vibrate, so as to drive the powder to vibrate and flow into the powder weighing hopper 31, the powder always vibrates in the powder feeding process, and the control system can control the vibration frequency of the vibrator 252, so as to adjust the powder feeding speed of each path of powder. The weighing device 32 can monitor the weight of the powder in the weighing hopper 31 in real time and transmit the weight to the control system, and the control system controls the closing of the vibrator 252 to stop powder feeding, so that the on-line weighing of multiple paths of powder is realized. Compared with the prior art, the vibration groove 251 vibrates to drive the powder to vibrate and flow into the weighing hopper 31, so that the powder is always in a vibration state in the powder feeding process, the powder agglomeration is avoided, and the uniform powder feeding of light fine powder is ensured. The weighing device 32 can monitor the weight of the powder in the weighing hopper 31 in real time, realizes on-line weighing of multiple paths of powder, and further improves the proportioning precision of different powders. In addition, the control system can adjust the preset powder weights of different weighing hoppers 31 in real time, so that the proportion of multiple paths of powder can be adjusted in real time.
In some embodiments, referring to fig. 6, the powder feeding platform 11 is provided with a first through hole at the center, the top of the weighing hopper 31 passes through the first through hole and is disposed below the powder outflow opening of the corresponding vibration groove 251, and the height gap between the top inlet of the weighing hopper 31 and the powder outflow opening of the corresponding vibration groove 251 is 5mm-20mm. Illustratively, the height clearance between the top inlet of the hopper 31 and the powder outflow opening of the corresponding vibration tank 251 is 5mm, 10mm, 15mm, 20mm, etc. By arranging the first through hole in the center of the powder feeding platform 11, the top of the weighing hopper 31 passes through the first through hole and the top inlet of the weighing hopper 31 is positioned below the powder outflow opening of the corresponding vibration groove 251, so that all powder flowing down in the vibration process of the vibration groove 251 enters the corresponding weighing hopper 31, and the splashing loss of the powder is avoided. In addition, a certain height gap exists between the top inlet of the weighing hopper 31 and the powder outflow opening of the corresponding vibrating trough 251, so that the vibrating trough 251 and the weighing hopper 31 are prevented from being collided to interfere with each other during vibration, the height gap is between 5mm and 20mm, powder is prevented from splashing during powder feeding during vibration due to overlarge gap, and powder loss and waste are avoided.
In one possible implementation, referring to fig. 8, the powder mixing unit 4 includes a powder mixing tank 41, a stirring assembly 42, an air inlet assembly 43, and an air outlet assembly 44, where the powder mixing tank 41 is rotatably mounted on the powder mixing platform 12 of the carrier 1, and the stirring assembly 42, the air inlet assembly 43, and the air outlet assembly 44 are mounted on the powder mixing platform 12. The powder mixing tank 41 communicates with the powder weighing unit 3, specifically, the feed port of the powder mixing tank 41 communicates with the powder outlet port of the corresponding weighing hopper 31, so that the powder mixing tank 41 can receive at least two kinds of powder. And in the concrete implementation, a gap of 2mm-4mm is reserved between the powder outlet of the weighing hopper 31 and the feeding port of the powder mixing tank 41 in the vertical direction, so that the interference caused by symmetrical weight is avoided. In addition, the diameter of the powder outlet of the weighing hopper 31 is smaller than that of the corresponding powder inlet of the powder mixing tank 41, and the difference range is 2mm-4mm, so that the powder discharging speed is lower and the risk of powder residue is avoided when the powder outlet of the weighing hopper is smaller. The stirring assembly 42 is mounted on the powder mixing platform 12 of the carrier 1 and is used for stirring at least two kinds of powder in the powder mixing tank 41. The air inlet assembly 43 is arranged on the bearing frame 1 and is used for introducing air into the powder mixing tank 41. The air outlet assembly 44 is disposed on the carrier 1, and is used for guiding out the air in the powder mixing tank 41 and the mixed powder.
Under the condition of adopting the technical scheme, when the powder weighing unit 3 conveys the weighed powder into the powder mixing tank 41 through the powder outlet of the weighing hopper 31 and the feed inlet of the powder mixing tank 41, and powder in the powder mixing tank 41 is required to be mixed, the stirring assembly 42 can stir the powder, the air inlet assembly 43 can introduce air into the powder mixing tank 41 to suspend the powder, and the powder mixing time can be reduced and the powder mixing effect can be improved by jointly mixing the powder through the stirring assembly 42 and the air inlet assembly 43; secondly, after the air inlet component 43 is used for introducing air into the powder mixing tank 41, powder is suspended in the air under the action of the air, at the moment, the stirring component 42 can stir surrounding air to form a fluid structure such as a rotational flow and a vortex, and under the action of the fluid structure and the air introduced by the air inlet component 43, the powder mixing time can be further reduced, the powder mixing effect can be improved, the powder mixing is more uniform, and the workpiece performance formed by laser material increase is better; thirdly, powder in the powder mixing tank 411 can be exported through the cooperation of the air inlet component 43 and the air outlet component 44, after the air inlet component 43 is filled with air, the air flows through the powder mixing tank 41 and enters the air outlet component 44, and is exported through the air outlet component 44, and the air is carried out in a carrier gas mode when flowing through the powder mixing tank 41, so that the powder can be exported in a relatively uniform state and enter the next working procedure, and further, the workpiece performance formed by laser material increase is better. In addition, when the air inlet assembly 43 is used for introducing air into the powder mixing tank 41, powder in the powder mixing tank 41 can be cleaned, so that the powder mixing device can realize a self-cleaning function.
As shown in fig. 8, further, the stirring assembly 42 includes a driving motor 421 and a fan blade 422, the driving motor 421 is connected to the fan blade 422, the fan blade 422 is disposed in the powder mixing tank 41, and the driving motor 421 rotates by driving the fan blade 422 to stir the powder in the powder mixing tank 41. The driving motor 421 is installed on the powder mixing platform 12, the fan blade 422 is located inside the powder mixing tank 41 and connected to the motor shaft of the driving motor 421, and the driving motor 421 can drive the fan blade 422 to rotate. The driving motor 421 can drive the surrounding fluid to move to form a fluid structure such as a rotational flow and a vortex when driving the fan blade 422 to rotate, and under the action of the fluid structure and the gas introduced by the air inlet component 43, the powder mixing time can be further reduced, the powder mixing effect can be improved, the powder mixing is more uniform, and the workpiece performance formed by laser material increase is better.
In some embodiments, as shown in fig. 8, the fan blade 422 is disposed at a central position of the powder mixing tank 411, and the fan blade 422 includes a plurality of blades equally distributed along a circumferential direction thereof. Illustratively, the rotational speed of the driving motor 421 is not less than 10000 revolutions per minute, and the blades may have a 35 degree pitch angle. Illustratively, in this embodiment, the volume of the powder mixing tank 41 is 3.4 liters, the diameter of the blades is at least 80mm, the number of the blades is at least three, and the fan blades 422 can form a better swirling effect after 2 minutes of running. With this structure, when the fan blade 422 is disposed at the center of the powder mixing tank 41, the effect of the formed swirling flow and vortex is better, so that the powder is uniformly diffused in the powder mixing tank 41, and the powder is more uniformly mixed, so that the powder mixing effect is improved; when stirring through a plurality of blades that divide equally along circumference, the effect of the whirl and the vortex that forms is better, more effectually carry out dust, dispersion, the mixing to the powder like this more even, improves the powder mixing effect.
Alternatively, the air intake assembly 43 includes an air intake pipe 431, a first control valve 432, and a flow meter 433, and one end of the air intake pipe 431 extends into the powder mixing tank 41, and the other end is used to be connected to an external air supply device. The control system is electrically connected to the first control valve 432 for closing or opening the air inlet pipe 431, and the flow meter 433 is disposed on a pipeline of the air inlet pipe 431 for measuring a flow rate of the air flowing through the air inlet pipe 431. When air intake is needed, the control system controls the first control valve 432 to open the air inlet pipe 431, and air of external air supply equipment flows into the powder mixing tank 41 through the air inlet pipe 431 for air supply; when the air intake is not needed, the control system controls the first control valve 432 to close the air intake pipe 431, the air of the external air supply device is cut off when passing through the air intake pipe 431, and no air flows into the powder mixing tank 41. The flow rate of the gas in the gas inlet pipe 431 can be calculated by the flow meter 433, and the amount of the supplied gas in the powder mixing tank 41 can be precisely controlled. The flow meter 433 may be a mechanical flow meter 433 or an electronic flow meter 433, which is not particularly limited herein.
Similarly, when the air outlet assembly 44 includes an air outlet tube 441 and a second control valve 442, one end of the air outlet tube 441 is located in the powder mixing tank 41, and the other end extends out of the powder mixing tank 41, and the control system is further electrically connected to the first control valve 432 for closing or opening the air outlet tube 441. At this time, when it is required to mix the powder in the powder mixing tank 41 or clean the powder mixing tank 41, the first control valve 432 opens the air inlet pipe 431, the second control valve 442 closes the air outlet pipe 441, and the air in the air inlet pipe 431 is introduced into the powder mixing tank 41; when powder is required to be fed out, the second control valve 442 opens the gas outlet pipe 441, and the gas in the gas inlet pipe 431 flows through the powder mixing tank 41 and feeds out the powder-gas mixture in the powder mixing tank 41 from the gas outlet pipe 441. Illustratively, the control valve may be a solenoid valve, a pneumatic valve, or the like.
In some embodiments, the powder mixing unit 4 further comprises a rotating assembly 45 connected to the powder mixing tank 41 for driving the powder mixing tank 41 to rotate relative to the carrier 1. The control system is connected with the rotating assembly 45 and is used for controlling the rotation stop of the powder mixing tank 41. The powder mixing tank 41 is rotatably connected with the powder mixing platform 12 through a bearing, and the powder mixing tank 41 is in sealing connection with the powder mixing platform 12. The rotation assembly 45 can drive the powder mixing tank 41 to rotate forward and reversely, and the swing of the powder mixing tank 41 can be realized by controlling the forward rotation and the reverse rotation of the powder mixing tank 41, so that the cleaning effect of the powder mixing tank 41 is better. Specifically, when the powder mixing tank 41 rotates, the stirring assembly 42, the air inlet assembly 43 and the air outlet assembly 44 do not rotate along with the rotation of the powder mixing tank 41, and when the powder mixing tank 41 rotates, powder can be further mixed, so that the mixing effect of the powder can be further improved; meanwhile, the air inlet assembly 43 can blow and clean the powder mixing tank 41 for one week, so that the cleaning effect of the powder mixing tank 41 is improved. In addition, the inner walls of the container through which the powder passes, such as the powder storage cylinder 21, the weighing hopper 31, the powder mixing tank 41, and the like, are polished and mirror-finished, so that the powder residue is reduced to the greatest extent.
As shown in fig. 8, further, the rotation assembly 45 includes a driving member 451, a driving gear 452 and a driven gear 453, the driving member 451 is in transmission connection with the driving gear 452, the driving gear 452 is meshed with the driven gear 453, and the driven gear 453 is fixed on the powder mixing tank 41 or is integrally formed with the powder mixing tank 41. The driving member 451 drives the driving gear 452 to rotate, and when the driving gear 452 rotates, the driven gear 453 is driven to rotate, and when the driven gear 453 rotates, the powder mixing tank 41 is driven to rotate relative to the powder mixing platform 12. The driving member 451 may be a motor or a cylinder, for example. With this structure, when the driving gear 452 is driven to rotate by the driving member 451, the driven gear 453 can be driven to rotate, and the powder mixing tank 41 can be driven to rotate relative to the powder mixing platform 12.
Further, as shown in fig. 9, a plurality of air blowing holes 4311 are provided on the wall of the air inlet pipe 431, and the air blowing holes 4311 face the inner wall of the powder mixing tank 41 to purge the powder on the inner wall of the powder mixing tank 41. Illustratively, the shape of the air inlet pipe 431 is matched with the shape of the inner wall of the powder mixing tank 41, for example, in this embodiment, the powder mixing tank 41 includes a main body, a transition portion and a bottom plate, which are sequentially connected, the transition portion is obliquely disposed with respect to the main body, the air inlet pipe 431 includes an upper pipe portion and a lower pipe portion, the lower pipe portion is obliquely disposed with respect to the upper pipe portion, the upper pipe portion is parallel disposed with respect to the main body, and the lower pipe portion is parallel disposed with respect to the transition portion. Illustratively, a plurality of gas vents 4311 are provided on both the upper and lower tube portions. Illustratively, the aperture of the gas vent 4311 is 1.5mm, which can avoid the risk of blockage when the aperture is too small, and avoid poor gas inlet effect when the aperture is too large. With this structure, the inner wall of the powder mixing tank 41 can be blown through the plurality of blowing holes 4311, so that the cleaning effect of the air inlet component 433 can be improved, and the self-cleaning function of the powder mixing device can be improved.
Referring to fig. 10, a plurality of exhaust holes 4411 are provided on the wall of the outlet pipe 441. Illustratively, the air outlet tube 441 is of a straight tube structure parallel to the axis of the powder mixing tank 41, a plurality of air outlet holes 4411 are sequentially formed in the air outlet tube 441 along the vertical direction, and a plurality of rows of air outlet holes 4411 are uniformly distributed in the circumferential direction of the air outlet tube 441. The distance between the air outlet pipe 441 and the inner wall of the powder mixing tank 41 is about 20mm, so that the powder-gas mixture of the powder mixing tank 41 can be more uniformly discharged through the air outlet holes 4411; illustratively, the aperture of the exhaust hole 4411 is 1.5mm, which can avoid the risk of blockage when the aperture is too small and avoid poor exhaust effect when the aperture is too large. By adopting the structure, the exhaust is carried out through the exhaust holes 4411, so that the powder-gas mixture in the powder mixing tank 41 can be more uniformly discharged through the exhaust holes 4411, the powder discharged from the air outlet is more uniform, and the workpiece performance formed by laser material increase is better.
In an alternative way, an opening is arranged at the bottom of the powder mixing tank 41, a first valve is arranged on the powder mixing tank 41 at a position corresponding to the opening, and the control system is electrically connected with the first valve and is used for closing or opening the opening. The first valve may be a butterfly valve, for example. By adopting the structure, powder in the powder mixing tank 41 can be discharged in two powder discharging modes, one is that the powder mixture is discharged from the gas outlet pipe 441 in a carrier gas mode through the matching of the gas inlet component 43 and the gas outlet component 44, and the other is that the powder is discharged through an opening at the bottom of the powder mixing tank 41 in a free powder falling mode under the action of gravity, so that the cleanliness of the powder mixing tank 41 is higher, and the self-cleaning effect of the powder mixing device is improved.
As shown in fig. 8, further, the powder mixing unit 4 further includes a vibration motor mounted on the powder mixing tank 41. With this structure, the vibration motor can vibrate the powder mixing unit 4, so that the powder in the powder mixing tank 41 can be further reduced, and the cleaning effect of the powder mixing device can be improved.
In the implementation, a second valve is further disposed at the position of the powder falling nozzle 242, and the second valve is electrically connected to the control system to prevent or release the powder in the powder storage barrel 21 from falling through the powder falling nozzle 242. A third valve is arranged at the position of the powder outlet at the bottom of the weighing hopper 31 and is electrically connected with a control system to control the on-off of the powder outlet of the weighing hopper 31. Meanwhile, a fourth valve is installed at the position of the feed inlet of the powder mixing tank 41, and the fourth valve is electrically connected with the control system for preventing or allowing the powder mixing tank 41 to receive the powder. The first valve, the second valve, the third valve and the fourth valve may be butterfly valves.
In practice, initially, the second valve may be left open and the third valve closed. The second shell 24 is sleeved outside the first shell 22, the bearing column 241 props up the sealing valve cap 23 in a bearing way so that the sealing valve cap 23 is separated from the limiting surface, materials in the first cavity 221 are output through the second end and the powder falling nozzle 242, powder falls into the vibration groove 251 under the action of self gravity, powder received by the vibration groove 251 falls from one end of the vibration groove under the action of vibration of the corresponding vibrator 252, the powder is received by the weighing hopper 31, the weighing device 32 weighs the weight of the powder in the weighing hopper 31 in real time, and when a weight signal of the weighing device 32 received by the control system reaches a preset value, the control system controls the second valve of the corresponding powder to be closed, and meanwhile, the corresponding vibrator 252 stops vibrating. When the weights of the various powders reach the preset value, the control system controls the third valve and the fourth valve to be opened, and at this time, the powder in the weighing hopper 31 can drop into the powder mixing tank 41 to finish the powder supply.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. Laser material-increasing powder feeding equipment, characterized by comprising:
a carrier;
the powder supply unit is arranged on the bearing frame and is used for supplying at least two kinds of powder under the action of gravity;
the powder weighing unit is arranged on the bearing frame; the powder weighing unit is communicated with the powder supply unit and is used for receiving the powder and respectively weighing the received at least two kinds of powder;
the powder mixing unit is communicated with the powder weighing unit and is used for receiving, mixing and outputting at least two kinds of powder weighed by the powder weighing unit;
the control system is electrically connected with the powder supply unit and is used for controlling the powder supply unit to start or stop supplying powder; the control system is electrically connected with the powder weighing unit and is used for receiving weight signals of at least two kinds of powder weighed by the powder weighing unit respectively, and when the weight of any one of the powder weighed by the powder weighing unit reaches a preset value, the control system controls the powder supply unit to stop the supply of the powder; the control system is also electrically connected with the powder mixing unit and is used for controlling the powder mixing unit to start or stop mixing at least two kinds of powder and controlling the powder mixing unit to output the mixed powder.
2. The laser additive powder delivery apparatus of claim 1, wherein the powder supply unit comprises:
at least two powder storage cylinders for storing the powder; the outlet end of the powder storage barrel is connected with a first shell, the first shell is provided with a first end and a second end which are oppositely arranged, and the first end is connected with the outlet end of the powder storage barrel; the first shell is provided with a first cavity which penetrates through from the first end to the second end;
the sealing valve cap is arranged in the first cavity; the sealing valve cap is provided with a third end and a fourth end which are oppositely arranged, a limiting surface is arranged at the position, close to the second end, of the inner wall of the first cavity, and the limiting surface is used for preventing the sealing valve cap from falling off from the second end; the sealing valve cap is provided with a sealing position and a releasing position relative to the first shell, when the sealing valve cap is supported on the limiting surface, the sealing valve cap is positioned at the sealing position, and the fourth end of the sealing valve cap is in sealing contact with the limiting surface; when the sealing valve cap is separated from the limiting surface, the sealing valve cap is positioned at the release position; a first limiting frame is arranged in the first shell, a limiting hole matched with the third end is formed in the first limiting frame, and the third end movably passes through the limiting hole;
The second shell is arranged on the bearing frame, the second shell is sleeved outside the first shell, a bearing column is arranged in the second shell and used for bearing and jacking the sealing valve cap, so that the sealing valve cap is positioned at the release position; a powder falling nozzle is arranged at one end of the second shell, which is far away from the powder storage cylinder;
the vibration powder feeding assembly comprises at least two vibration grooves and at least two vibrators, the vibration grooves are communicated with the powder falling nozzle, and each vibration groove is used for receiving one of the powder; the vibrator is arranged on the bearing frame and used for controlling the corresponding vibrating groove to vibrate so as to enable powder received by the vibrating groove to fall from one end of the vibrating groove; the control system is electrically connected with the vibrator and is used for controlling the starting and stopping of the vibration groove and controlling the vibration frequency of the vibration groove.
3. The laser additive powder feeding device according to claim 2, wherein a collar is arranged on the outer wall of the powder storage barrel, the powder feeding unit further comprises a pressing assembly arranged on the bearing frame, and the pressing assembly is matched with the collar and used for enabling the powder storage barrel to be pressed and limited on the bearing frame.
4. The laser additive powder delivery apparatus of claim 2, wherein the vibratory powder delivery assembly further comprises a shock absorbing spring disposed between the corresponding vibrator and the carrier for eliminating interference with the carrier caused by shielding the vibrator from vibration.
5. The laser additive powder feeding device according to claim 1, wherein the powder weighing unit comprises at least two weighing hoppers and at least two weighing devices, the weighing hoppers are fixedly connected with the corresponding weighing devices, the weighing hoppers are arranged below the powder supply unit, each weighing hopper is used for receiving one of the powder conveyed by the powder supply unit, and the weighing devices are arranged on the bearing frame and used for weighing the powder in the weighing hoppers; the control system is electrically connected with the weighing device and is used for receiving the electric signals transmitted by the weighing device and controlling the start and stop of the powder supply unit and the powder supply frequency of the powder supply unit.
6. The laser additive powder delivery apparatus of claim 1, wherein the powder mixing unit comprises:
the powder mixing tank is rotatably arranged on the bearing frame, and is communicated with the powder weighing unit and used for receiving at least two kinds of powder;
The stirring assembly is arranged on the bearing frame and is used for stirring at least two kinds of powder in the powder mixing tank;
the air inlet assembly is arranged on the bearing frame and is used for introducing air into the powder mixing tank;
and the air outlet assembly is arranged on the bearing frame and used for guiding out air in the powder mixing tank and mixed powder.
7. The laser additive powder delivery apparatus of claim 6, wherein the stirring assembly includes a drive motor and a fan blade, the drive motor is connected to the fan blade, the fan blade is disposed in the powder mixing tank, and the drive motor is configured to stir the powder in the powder mixing tank by driving the fan blade to rotate.
8. The laser additive powder feeding device according to claim 6, wherein the air inlet assembly comprises an air inlet pipe, a first control valve and a flowmeter, one end of the air inlet pipe extends into the powder mixing tank, and the other end of the air inlet pipe is connected with external air supply equipment; the control system is electrically connected with the first control valve and is used for closing or opening the air inlet pipe; the flowmeter is arranged on a pipeline of the air inlet pipe and is used for measuring the flow rate of the air flowing through the air inlet pipe;
The air outlet assembly comprises an air outlet pipe and a second control valve, one end of the air outlet pipe is positioned in the powder mixing tank, the other end of the air outlet pipe extends out of the powder mixing tank, and the control system is further electrically connected with the first control valve and is used for closing or opening the air outlet pipe.
9. The laser additive powder conveying device according to claim 8, wherein the powder mixing unit further comprises a rotating component connected with the powder mixing tank and used for driving the powder mixing tank to rotate relative to the bearing frame; the control system is connected with the rotating assembly and used for controlling the rotation stop of the powder mixing tank.
10. The laser additive powder feeding device according to claim 9, wherein a plurality of air blowing holes are formed in the pipe wall of the air inlet pipe, and the air blowing holes face the inner wall of the powder mixing tank so as to purge powder on the inner wall of the powder mixing tank; or alternatively, the first and second heat exchangers may be,
a plurality of exhaust holes are formed in the pipe wall of the air outlet pipe; or alternatively, the first and second heat exchangers may be,
the bottom of mixing powder jar is provided with the opening, mixing powder jar is last to correspond opening position department is provided with first valve, control system with first valve electricity is connected for closure or opening the opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310825136.5A CN116985400A (en) | 2023-07-06 | 2023-07-06 | Laser material-increasing powder feeding equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310825136.5A CN116985400A (en) | 2023-07-06 | 2023-07-06 | Laser material-increasing powder feeding equipment |
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| CN202310825136.5A Pending CN116985400A (en) | 2023-07-06 | 2023-07-06 | Laser material-increasing powder feeding equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117443250A (en) * | 2023-12-26 | 2024-01-26 | 秦皇岛曼国装备科技有限公司 | Powder mixing and drying device and powder mixing and conveying system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117443250A (en) * | 2023-12-26 | 2024-01-26 | 秦皇岛曼国装备科技有限公司 | Powder mixing and drying device and powder mixing and conveying system |
| CN117443250B (en) * | 2023-12-26 | 2024-03-29 | 秦皇岛梵鼎森贸易有限公司 | Powder mixing and drying device and powder mixing and conveying system |
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