CN114074188A - Plasma arc powder additive manufacturing powder laying fusion forming device and method - Google Patents
Plasma arc powder additive manufacturing powder laying fusion forming device and method Download PDFInfo
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- CN114074188A CN114074188A CN202111389198.3A CN202111389198A CN114074188A CN 114074188 A CN114074188 A CN 114074188A CN 202111389198 A CN202111389198 A CN 202111389198A CN 114074188 A CN114074188 A CN 114074188A
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- 239000000843 powder Substances 0.000 title claims abstract description 226
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000654 additive Substances 0.000 title claims abstract description 21
- 230000000996 additive effect Effects 0.000 title claims abstract description 21
- 230000004927 fusion Effects 0.000 title claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 73
- 239000002184 metal Substances 0.000 claims abstract description 73
- 238000003466 welding Methods 0.000 claims abstract description 47
- 238000002844 melting Methods 0.000 claims abstract description 28
- 230000008018 melting Effects 0.000 claims abstract description 28
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 27
- 239000000956 alloy Substances 0.000 claims abstract description 27
- 239000000758 substrate Substances 0.000 claims abstract description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 56
- 230000007480 spreading Effects 0.000 claims description 40
- 238000003892 spreading Methods 0.000 claims description 39
- 229910052786 argon Inorganic materials 0.000 claims description 28
- 239000007789 gas Substances 0.000 claims description 27
- 238000010309 melting process Methods 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000007639 printing Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 238000010410 dusting Methods 0.000 claims 6
- 238000009423 ventilation Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 229910002065 alloy metal Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/80—Plants, production lines or modules
- B22F12/88—Handling of additively manufactured products, e.g. by robots
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/30—Platforms or substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/40—Radiation means
- B22F12/41—Radiation means characterised by the type, e.g. laser or electron beam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/50—Means for feeding of material, e.g. heads
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- 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
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention discloses a plasma arc powder additive manufacturing powder laying fusion forming device and a method, which is characterized in that a bottom plate for fixing a substrate is placed on a clamp workbench, the substrate is placed in the bottom plate with a good opening, a forming thin plate with a powder laying opening is placed on the bottom plate, the forming thin plate is repeatedly placed and clamped, then a powder laying walking route is set on a plasma robot, the plasma robot drives a powder laying device to evenly lay refractory high-entropy alloy powder into the opening of the forming thin plate, the powder laying thickness can be adjusted through the powder feeding rotating speed on the powder laying device, then a plasma welding gun walking route is set at a control end of the plasma robot to achieve the effect of fusing powder, the plasma robot drives the plasma welding gun and the powder laying device to move to lay powder in real time, the production period and the production cost are greatly reduced, the production efficiency is improved, the melting method enables the powder to be heated more uniformly, and solves the problem that the metal powder is too high in viscosity and cannot be discharged.
Description
Technical Field
The invention belongs to the technical field of additive manufacturing, and particularly relates to a powder laying fusion forming device and method for plasma arc powder additive manufacturing.
Background
The plasma arc additive manufacturing technology belongs to a branch of metal additive manufacturing technology, uses low-cost plasma arc high-energy beams as heat sources, has high efficiency and high compactness of formed parts, can be carried on a robot or a numerical control platform due to a powder feeding mode, and theoretically can realize unlimited forming size. Although the geometric accuracy and surface roughness of the formed complex metal product are slightly lower, the problem can be solved by combining plasma additive and CNC milling. However, during the powder plasma additive manufacturing process, some refractory high-entropy alloy powder cannot be sent to the high-energy beam heat source port end in a normal powder feeding mode, so that normal additive forming cannot be performed.
A multi-material powder supplying and spreading device for powder bed melting and a control method thereof (application No. 201610994357.5) discloses a multi-material powder supplying and spreading device for powder bed melting and a control method thereof, which mainly mixes and stirs single metal powder at the upper part, and uses laser as a heat source to spray powder and print by a powder nozzle after mixing. The method of mixing powder from the top wastes a lot of manufacturing time and easily causes uneven powder mixing, and the method of melting the powder bed adopts a method of feeding powder and printing, so that the problem that some mixed refractory high-entropy alloy powder cannot be fed out is not solved, the shape of a formed block cannot be changed at will, and a powder laying path and a heat source walking path cannot be arranged.
Disclosure of Invention
The invention aims to provide a powder laying and melting forming device for plasma arc powder additive manufacturing, which is used for supplementing the defects of the prior art.
In order to achieve the above purpose, the invention adopts the technical scheme that: the utility model provides a plasma arc powder vibration material disk spreads powder melting forming device, its characterized in that, includes plasma robot, anchor clamps workstation, plasma welding torch and spreads the powder device, the bottommost layer of anchor clamps workstation is provided with takes open-ended bottom plate, still be provided with base plate, shaping sheet metal on the bottom plate, the opening setting that the base plate is located the bottom plate, and it is used for preventing that the base plate from taking place the displacement and warping at the printing process, still be provided with the spiral clamp who is used for pressing from both sides tight shaping sheet metal on the anchor clamps workstation, plasma welding torch is fixed on plasma robot's link with spreading the powder device, still be provided with temperature sensor on the plasma welding torch, temperature data when temperature sensor is used for monitoring the melting powder, spread the powder device and be provided with the hydraulic means who is used for driving its up-and-down motion.
Furthermore, the spiral chuck is arranged on the clamp workbench, when the opening bottom plate, the base plate and the formed thin plate are installed, the spiral chuck is screwed to a certain position, the size of the block to be formed is determined, and after the corresponding bottom plate, the base plate and the formed thin plate are placed, the spiral chuck is screwed down to clamp, so that looseness and deformation caused by heating in the forming process are prevented.
Furthermore, the powder spreading device is fixed on the plasma robot through a connecting frame, and the whole powder spreading device consists of a hydraulic device, a metal powder tank supporting frame, a metal powder tank, a gas transmission guide pipe, a flow valve and a powder spreading head.
Further, spread the powder device and fix on plasma robot, it is accurate that hydraulic means fixes on plasma robot to say so, and metal powder jar support frame is fixed on hydraulic means, is provided with into outlet on the hydraulic means, leads to hydraulic pressure fluid control metal powder jar support frame through into outlet respectively and reciprocates.
Furthermore, the metal powder tank can be seamlessly placed into the metal powder tank support frame, the upper end cover is screwed after the metal powder tank is placed into the metal powder tank support frame, and a socket used for inserting a gas transmission pipeline is formed in the upper end cover and used for inputting argon into the metal powder tank.
Furthermore, the lower end of the metal powder tank, namely the upper end of the powder paving head, is provided with a flow control valve, the flow control valve is driven by an external motor, the rotating speed of the flow control valve can be set at the control end of the plasma robot, the thickness of the powder paving layer is directly related to the size of the flow rotating speed, and the thickness of the powder paving layer is reasonably selected according to the thickness of the formed thin plate and the property of the fused powder.
Further, a powder spreading head is arranged below the metal powder tank, and the shape of the powder spreading head can be selected according to the width of the block body made of the selected forming thin plate.
Further, the plasma welding torch is fixed on the plasma robot link, has plasma robot to drive the welder motion, and there is gas through hole plasma welding torch upper portion, mainly is for below plasma welding torch provides ion gas and shielding gas in the melting process, and temperature sensor has been placed to plasma welding torch rifle head department, and temperature sensor is used for monitoring melting temperature in the melting process.
A method of plasma arc powder additive manufacturing powder laying fusion forming device, comprising the steps of:
step 1) placing a fixture workbench, arranging a bottom plate at the bottom of the fixture workbench, placing a substrate for forming at an opening in the middle of the bottom plate, then placing a formed sheet, and then rotating a spiral chuck to clamp the formed sheet;
step 2) opening an argon bottle valve to fill argon gas into a metal powder tank containing metal powder, putting high-entropy alloy powder after a certain time, inputting a preset powder paving path at a control end of a plasma robot, setting a powder paving program, starting the robot, simultaneously opening a flow control valve and a powder paving device to pave powder, closing the argon gas input after paving the powder, closing the flow control valve, and opening a hydraulic device to drive the whole powder paving device to move upwards to an original position;
step 3) after powder laying is finished, rapidly driving a plasma welding gun to perform powder melting according to a preset melting path by a plasma robot, wherein argon protective gas is sprayed out of a head of the plasma welding gun in the melting process to protect the alloy from being oxidized in the melting process, and meanwhile, the temperature of the plasma welding gun in the alloy melting process can be monitored in real time by a temperature sensor of the head of the plasma welding gun to ensure that the melting temperature is basically consistent in the whole melting process, so that the tissue uniformity of the formed alloy is improved;
and 4) after a layer of metal powder is melted, monitoring the cooling of the formed alloy to a certain temperature through a temperature sensor at the position of the gun head, loosening the spiral chuck, putting the next layer of formed thin plate, rotating the spiral chuck again to clamp the just-put next layer of formed thin plate, and repeating the step 2 and the step 3 until the high-entropy alloy block is manufactured.
Compared with the prior art, the invention has the advantages that the base plate of the base plate is placed on the clamp workbench, the base plate is placed in the base plate with the opening, the forming thin plate with the powder spreading opening is placed on the base plate, the first layer of thin plate clamping clamp is placed, the powder spreading walking route is set on the plasma robot, the plasma robot drives the powder spreader to uniformly spread the refractory high-entropy alloy powder into the opening of the forming thin plate, the powder spreading thickness can be adjusted through the powder feeding rotating speed on the powder spreading device, and then the plasma welding gun walking route is set at the control end of the plasma robot, so that the effect of melting the powder is achieved, the plasma welding gun and the powder spreading device are driven by the plasma robot to move, so that the powder can be spread in real time for real-time processing, the production period and the production cost are greatly reduced, and the production efficiency is improved. The melting device heats the powder more uniformly, and solves the problem that the metal powder is too high in viscosity and cannot be discharged.
Has the advantages that: the utility model provides a plasma arc powder vibration material disk powder melting forming device, through the mode of putting into the opening that the bottom plate reserved with the base plate and retraining, then put the bottom plate on the anchor clamps workstation, put the shaping sheet metal and screw spiral clamp, make the in-process base plate of molten metal powder can not take place any form displacement and deformation like this, the efficiency of melting has been improved indirectly and the problem of avoiding being brought by the base plate displacement in the melting process is avoided, the up-and-down motion of shop's powder device is realized through a small-size hydraulic means, by plasma robot operation platform end control, shop's powder head's shape and shaping sheet metal opening shape the same can realize disposable shop's powder, the time of shop's powder process waste has been avoided, the efficiency is improved, plasma welding rifle mouth can spout protective gas in the melting process, can protect like this not by the oxidation at the melting process metal.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the overall structure of the jig table of the present invention.
FIG. 3 is a schematic view of a plasma torch according to the present invention.
Fig. 4 is a schematic structural view of the powder spreading device.
Fig. 5 is a schematic structural diagram of the hydraulic device.
Reference numerals: 1. a jig table; 2. a plasma welding gun; 3. a powder spreading device; 4. a connecting frame; 11. a base plate; 12. a substrate; 13. forming a thin plate; 14. rotating the spiral chuck; 21. an airway tube; 22. a plasma welding gun head; 23. a temperature sensor; 31. a conduit; 32. a powder spreading device; 33. a flow control valve; 34. spreading a powder head; 35. a metal powder can; 36. a metal powder can support frame; 37. an external motor; 321. a drive rod; 322. a drive body; 323. a fixed mount; 324. a liquid inlet and outlet.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflicting with each other.
The plasma arc powder additive manufacturing powder laying fusion forming device shown in the figures 1 to 5 is characterized by comprising a plasma robot, a clamp workbench 1, a plasma welding gun 2 and a powder laying device 3, the bottom layer of the clamp workbench 1 is provided with a bottom plate 11 with an opening, the bottom plate 11 is also provided with a base plate 12 and a forming thin plate 13, the base plate 12 is arranged at the opening of the bottom plate 11, which is used for preventing the substrate 12 from displacement and deformation in the printing process, a spiral chuck 14 for clamping the formed sheet 13 is further arranged on the clamp workbench 1, the plasma welding gun 2 and the powder spreading device 3 are fixed on a connecting frame 4 of the plasma robot, the plasma welding gun 2 is also provided with a temperature sensor 23, the temperature sensor 23 is used for monitoring temperature data when melting powder, and the powder spreading device 3 is provided with a hydraulic device 32 for driving the powder spreading device to move up and down.
As a further arrangement of the above solution, the spiral chuck 14 is configured to be elastic, and the spiral chuck 14 is used for repeatedly performing elasticity to add the formed thin plate 13 to repeat the powder laying forming operation during the operation of the plasma robot.
As a further arrangement of the above scheme, the powder spreading device 3 further comprises a guide pipe 31, a metal powder tank support frame 36, a metal powder tank 35 and a powder spreading head 34, wherein the metal powder tank support frame 36 is fixed on the hydraulic device 32, and the hydraulic device 32 can drive the metal powder tank support frame 36 to move up and down.
As a further arrangement of the above scheme, the hydraulic device 32 includes a fixing frame 323, a driving rod 321, and a liquid inlet and outlet 324 of the driving main body 322, liquid inlet of the liquid inlet and outlet 324 at the upper end can drive the whole powder spreading device 3 to move upwards, whereas liquid inlet of the liquid inlet and outlet 324 at the lower end can drive the powder spreading device 3 to move downwards.
As a further arrangement of the above scheme, the metal powder tank 35 is located in the metal powder tank support 36, the conduit 31 connected to the upper end of the metal powder tank 35 is used for inputting argon gas, and the argon gas is used for driving the metal powder in the metal powder tank 35 to flow downward.
As a further arrangement of the above scheme, the metal powder tank 35 is provided with a flow control valve 33, the flow control valve 33 is used for controlling the flow of the metal powder in the metal powder tank 35 which moves downwards to the position above the powder spreading head under the driving of argon, the flow control valve 33 comprises an external motor 37, and the external motor 37 is used for controlling the rotation speed of the internal impeller to control the flow of the metal powder through the rotation speed.
As a further arrangement of the above scheme, the plasma welding torch 2 comprises a plasma welding torch head 22 and a vent conduit 21, the temperature sensor 23 is located at the plasma welding torch head 22, and the vent conduit 21 is a passage pipeline for the ion gas and the shielding gas.
According to the scheme, the bottom plate 11 is placed at the bottom of the clamp workbench 1, the base plate 12 for forming is placed at the reserved forming opening in the middle of the bottom plate 11, the forming thin plate 13 is placed above the bottom plate 11 and the base plate 12 after being placed in sequence, the rotating spiral chuck 14 clamps the thin plate to prevent the forming thin plate 13 from deforming and displacing in the powder laying and melting process, the forming thin plate 13 is also provided with an opening matched with the forming opening, and the significance of the forming thin plate 13 is that the functions of high protection and the like are achieved in the powder laying process, powder laying and constraint on the next layer of forming alloy are facilitated, alloy powder is prevented from leaving a designated area, and the molten alloy is prevented from flowing out of the designated area.
According to the scheme, the powder spreading device 3 is fixed on the plasma robot connecting frame 4, the whole powder spreading device is composed of the hydraulic device 32, the metal powder tank supporting frame 36, the metal powder tank 35 and the powder spreading head 34, the hydraulic device 32 comprises the fixing frame 323, the driving rod 321 and the liquid inlet and outlet 324 of the driving main body 322, when liquid enters from the upper port, the whole powder spreading device is driven to move upwards, and otherwise, the driving device moves downwards.
According to the scheme, the metal powder tank 35 is placed into the metal powder tank support frame 36 and is driven by the metal powder tank support frame 36 to move, the guide pipe 31 at the upper end of the metal powder tank 35 is an argon inlet, argon is introduced mainly to isolate the metal powder tank 35 from air so as to ensure that high-entropy alloy powder is not oxidized, and then the argon flows to drive the powder to flow downwards.
According to the scheme, the metal powder moves downwards to the position above the powder spreading head 34 under the driving of the argon, the flow of the metal powder is controlled by the flow control valve 33, so that the purpose of controlling the powder spreading thickness is achieved, the flow control valve 33 is driven by the external motor 37, and the rotating speed of the internal impeller is controlled by adjusting the rotating speed of the external motor 37, so that the effect of controlling the flow of the metal powder is achieved.
According to the scheme, the plasma welding gun 2 is fixed on the robot connecting frame 4, the plasma welding gun 2 is driven by the plasma robot to work, the plasma welding gun 2 is used for melting and forming high-entropy alloy metal powder in the thin plate 13, the plasma welding gun 2 is provided with the air duct 21 for ion gas and shielding gas, and the temperature sensor 23 arranged on the gun head 22 of the plasma welding gun is used for monitoring the melting temperature in the melting process.
The method for manufacturing the powder laying fusion forming device by adopting the plasma arc powder additive comprises the following steps:
step 1) firstly placing a fixture workbench 1, selecting a corresponding bottom plate 11 according to the type and material of a substrate 12 to be selected, placing the bottom plate 11 at the bottom of the fixture workbench 1, placing the selected substrate 12 for forming at an opening in the middle of the bottom plate 11, selecting a corresponding formed sheet 13 according to the block to be prepared, placing the bottom plate 11 and the substrate 12 in sequence, then placing the formed sheet, and rotating a spiral chuck 14 to clamp the sheet.
Step 2) selecting a corresponding powder spreading head 34 according to the opening shape of the formed thin plate 13, setting the flow rate of argon, opening an argon bottle valve, filling argon into a metal powder tank 35 containing metal powder through a conduit 31, putting refractory high-entropy alloy powder after a certain time, inputting a powder spreading path at a control end of a plasma robot, setting a powder spreading program, starting the plasma robot, simultaneously opening a flow control valve 33 to start driving a powder spreading device to spread powder, closing the argon input after the powder spreading is finished, closing the flow control valve 33, and opening a hydraulic device 32 to drive the whole powder spreading device to move upwards to a specified position.
And 3) after powder paving is finished, rapidly driving the plasma welding gun 2 to perform powder melting according to a preset melting path by the plasma robot, wherein argon protective gas is sprayed out of the plasma welding gun mouth in the melting process to protect the alloy from being oxidized in the melting process, and meanwhile, the temperature of the welding gun mouth in the melting process of the alloy can be monitored in real time by the temperature sensor 23 of the plasma welding gun head 22 to ensure that the melting temperature is basically consistent in the whole melting process, so that the tissue uniformity of the formed alloy is improved.
And 4) melting a layer of metal powder, monitoring that the target is cooled to a certain temperature through a temperature sensor 23, loosening the spiral chuck 14, placing the next layer of formed thin plate 13, rotating the spiral chuck 14 again to clamp the formed thin plate 13, and repeating the step 2 and the step 3 until the high-entropy alloy block is manufactured.
Example (b): the refractory Ti, Zr, Ta, Nb and Mo high-entropy alloy is prepared by adopting the device.
The first step is as follows: the proportion of each element of Ti, Zr, Ta, Nb and Mo is 1: 1: 1: 1: 1, selecting and preparing a block of 100X 30X 20.
The second step is that: the jig table 1 is placed, a 150 × 80 × 10 stainless steel plate is selected as a substrate 12, a bottom plate 11 with a corresponding opening is placed, the substrate 12 is placed in the bottom plate 11, a corresponding molded sheet 13 is selected according to the size of a molded sample, the bottom plate 11 and the substrate 12 are placed in order, the molded sheet 13 is placed, and a screw chuck 14 is rotated to clamp the sheet.
The third step: the corresponding powder spreading head 34 is selected according to the forming size of the forming thin plate 13, the gas flow rate is set at the flow valve of the argon bottle opening, and argon is filled into the metal powder tank 35 through the guide pipe 31.
The fourth step: after a certain time, put into metal powder jar 35 with TiZrTaNbMo powder, continue to let in argon gas, lay the powder route at plasma robot control end input simultaneously, set for and spread the powder procedure, start the robot and open flow control valve 33 simultaneously, it is 1mm to set for to spread powder thickness through flow control valve 33, the robot drives and spreads the powder device and spread the powder, spread the powder and accomplish the back, close the argon gas input, close flow control valve 33, open hydraulic means 32 and drive whole shop powder device 3 and upwards move to the assigned position.
The fifth step: and opening a valve of an air duct 21 on the input plasma welding gun 2, inputting ion gas and shielding gas into the plasma welding gun, rapidly driving the plasma welding gun 2 to melt powder according to a preset route by the plasma robot, and monitoring the melting process temperature in real time by a temperature sensor 23 on a gun head 22 of the plasma welding gun.
And a sixth step: after the melting is finished, the cooling temperature is continuously monitored by the temperature sensor 23, after the temperature is cooled to a certain temperature, the spiral clamp 14 is opened, the second layer of formed thin plate 13 is placed, the spiral clamp 14 is screwed, and the operations are repeated until the height of the formed thin plate reaches 20 mm. The high-entropy alloy block-shaped structure manufactured by the method does not need secondary processing, and the internal material is uniform and excellent in quality and meets the manufacturing target.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. The utility model provides a powder melting forming device is spread in plasma arc powder vibration material disk, its characterized in that, includes plasma robot, anchor clamps workstation (1), plasma welding gun (2) and shop powder device (3), the bottom layer of anchor clamps workstation (1) is provided with takes open-ended bottom plate (11), still be provided with base plate (12), shaping sheet metal (13) on bottom plate (11), base plate (12) are located the opening setting of bottom plate (11), and it is used for preventing that base plate (12) from taking place displacement and deformation at the printing process, still be provided with spiral clamp (14) that are used for pressing from both sides tight shaping sheet metal (13) on anchor clamps workstation (1), plasma welding gun (2) and shop powder device (3) are fixed on link (4) of plasma robot, still be provided with temperature sensor (23) on plasma welding gun (2), temperature sensor (23) are used for monitoring the temperature data when melting the powder, the powder spreading device (3) is provided with a hydraulic device (32) for driving the powder spreading device to move up and down.
2. The plasma arc powder additive manufacturing dusting fusion forming apparatus of claim 1 wherein: the spiral chuck (14) is arranged to be of an elastic structure, and the spiral chuck (14) is used for repeatedly loosening and tightening to add the formed thin plate (13) to repeatedly spread powder and form in the process of working of the plasma robot.
3. The plasma arc powder additive manufacturing dusting fusion forming apparatus of claim 1 wherein: spread powder device (3) and still include pipe (31), metal powder jar support frame (36), metal powder jar (35) and shop's powder head (34), metal powder jar support frame (36) are fixed on hydraulic means (32), hydraulic means (32) can drive metal powder jar support frame (36) up-and-down motion.
4. The plasma arc powder additive manufacturing dusting fusion forming apparatus of claim 3 wherein: the hydraulic device (32) comprises a fixing frame (323), a driving rod (321), a driving main body (322) and a liquid inlet and outlet (324), liquid inlet of the liquid inlet and outlet (324) at the upper end can drive the whole powder paving device (3) to move upwards, and liquid inlet and outlet (324) at the lower end can drive the powder paving device (3) to move downwards otherwise.
5. The plasma arc powder additive manufacturing dusting fusion forming apparatus of claim 3 wherein: metal powder jar (35) are located and set up in metal powder jar support frame (36), the upper end of metal powder jar (35) is connected pipe (31) are used for the input of argon gas, argon gas is used for driving metal powder in metal powder jar (35) flows downwards.
6. The plasma arc powder additive manufacturing dusting fusion forming apparatus of claim 3 wherein: the metal powder tank (35) is provided with flow control valve (33), flow control valve (33) are used for controlling the metal powder flow of moving downwards to shop's whitewashed head top in metal powder tank (35) under the drive of argon gas, flow control valve (33) include external motor (37), external motor (37) are used for controlling inside impeller rotational speed control metal powder flow through the rotational speed.
7. The plasma arc powder additive manufacturing dusting fusion forming apparatus of claim 1 wherein: the plasma welding gun (2) comprises a plasma welding gun head (22) and a ventilation guide pipe (21), the temperature sensor (23) is located on the plasma welding gun head (22), and the ventilation guide pipe (21) is a through pipeline for ion gas and protective gas.
8. A method of plasma arc powder additive manufacturing powder laying fusion forming device based on claim 1, comprising the steps of:
step 1), placing a fixture workbench (1), arranging a bottom plate (11) at the bottom of the fixture workbench (1), placing a substrate (12) for forming at an opening in the middle of the bottom plate (11), then placing a formed sheet (13), and then rotating a spiral chuck (14) to clamp the formed sheet (13);
step 2) opening an argon bottle valve to fill argon into a metal powder tank (35) containing metal powder, putting high-entropy alloy powder after a certain time, inputting a preset powder paving path at a control end of a plasma robot, setting a powder paving program, starting the robot, simultaneously opening a flow control valve (33) and a powder paving device (3) to pave powder, closing the argon input after paving the powder, closing the flow control valve (33), and opening a hydraulic device (32) to drive the whole powder paving device (3) to move upwards to an original position;
step 3) after powder paving is finished, the plasma robot rapidly drives the plasma welding gun (2) to perform powder melting according to a preset melting path, argon protective gas can be sprayed out of the plasma welding gun head (22) in the melting process to protect the alloy from being oxidized in the melting process, and meanwhile, the temperature of the plasma welding gun (2) in the alloy melting process can be monitored in real time through a temperature sensor (23) of the plasma welding gun head (22) to ensure that the melting temperature is basically consistent in the whole melting process, so that the tissue uniformity of the formed alloy is improved;
and 4) after a layer of metal powder is melted, monitoring the cooling of the formed alloy to a certain temperature through a temperature sensor (23) at the position of the gun head, loosening the spiral chuck (14), putting the next layer of formed thin plate (13), rotating the spiral chuck (13) again to clamp the just-put next layer of formed thin plate (13), and repeating the steps 2 and 3 until the high-entropy alloy block is manufactured.
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Inventor after: Chen Xizhang Inventor after: Xin Heyang Inventor before: Chen Xizhang |