CN111283193A - A double forming cylinder device for SLM equipment and its powder spreading system - Google Patents
A double forming cylinder device for SLM equipment and its powder spreading system Download PDFInfo
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- CN111283193A CN111283193A CN202010074410.6A CN202010074410A CN111283193A CN 111283193 A CN111283193 A CN 111283193A CN 202010074410 A CN202010074410 A CN 202010074410A CN 111283193 A CN111283193 A CN 111283193A
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- 239000000843 powder Substances 0.000 title claims abstract description 156
- 230000007480 spreading Effects 0.000 title claims abstract description 52
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- 239000000758 substrate Substances 0.000 claims abstract description 47
- 238000000465 moulding Methods 0.000 claims description 17
- 230000009977 dual effect Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 abstract description 11
- 238000007493 shaping process Methods 0.000 description 42
- 238000000034 method Methods 0.000 description 14
- 239000002184 metal Substances 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 238000003754 machining Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
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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
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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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
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
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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
- B22F12/22—Driving means
- B22F12/222—Driving means for motion along a direction orthogonal to the plane of a layer
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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
- B22F12/22—Driving means
- B22F12/224—Driving means for motion along a direction within the plane of a layer
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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
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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
- B22F12/90—Means for process control, e.g. cameras or sensors
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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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- 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
- B22F12/10—Auxiliary heating means
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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
本发明涉及一种用于SLM设备的双成型缸装置及其铺粉系统，所述双成型缸装置包括第一架体以及为整个装置供电的电源，双成型缸装置还包括连接第一架体的大成型缸子装置和小成型缸子装置，大成型缸子装置包括大成型缸基板组件和大成型缸驱动机构，大成型缸驱动机构的输出端连接大成型缸基板组件，小成型缸子装置包括小成型缸基板组件和小成型缸驱动机构，小成型缸驱动机构的输出端连接小成型缸基板组件，小成型缸驱动机构固定连接大成型缸基板组件，大成型缸基板组件对应设有供小成型缸基板组件移动的通道。与现有技术相比，本发明便于针对不同零件尺寸来选择不同的成型缸工作，具有使用方便、快捷且高效、提高了SLM设备的加工质量等优点。
The invention relates to a double forming cylinder device for SLM equipment and a powder spreading system thereof. The double forming cylinder device includes a first frame body and a power supply for supplying power to the whole device, and the double forming cylinder device also includes a connection to the first frame body. The large forming cylinder device and the small forming cylinder device include the large forming cylinder base plate assembly and the large forming cylinder driving mechanism, the output end of the large forming cylinder driving mechanism is connected to the large forming cylinder substrate assembly, and the small forming cylinder device includes the small forming cylinder The cylinder base plate assembly and the small forming cylinder driving mechanism, the output end of the small forming cylinder driving mechanism is connected to the small forming cylinder base plate assembly, the small forming cylinder driving mechanism is fixedly connected to the large forming cylinder base plate assembly, and the large forming cylinder base plate assembly is correspondingly provided with a small forming cylinder for The channel through which the substrate assembly moves. Compared with the prior art, the present invention facilitates the selection of different forming cylinders for different part sizes, and has the advantages of convenient, fast and efficient use, and improves the processing quality of the SLM equipment.
Description
Technical Field
The invention relates to the field of SLM (Selective laser melting) equipment, in particular to a double-forming-cylinder device for the SLM equipment and a powder spreading system thereof.
Background
The Selective Laser Melting (SLM) technique is a technique of directly irradiating metal powder with a high-energy Laser beam to rapidly melt and cool, solidify and form the metal powder, and it can be applied to a single metal powder or a mixed metal powder. The method can directly form metal powder into metal parts, the density of the parts is close to 100%, and the SLM technology is widely applied to the industries of aerospace, automobile manufacturing, war industry, medical treatment and the like.
In the process of processing parts, the SLM equipment needs to uniformly spread metal powder on a processing substrate, then is metallurgically bonded with a substrate platform under the action of laser, and processes all parts layer by layer on the basis of the substrate. And most of the SLM equipment at present have a single processing platform, namely, only one size of forming platform. For example, if the size of the processing substrate platform is 150mm × 150mm, the processing substrate platform can only process parts with the length and width within 150 mm; however, if a machining process is explored to perform machining of multi-process small parts, since the whole machining platform needs to be fully paved with metal powder every time of powder paving in the SLM machining process, small-size parts are troublesome to machine by using large-platform SLM equipment.
The invention with the publication number of CN108188394A discloses an area-adjustable forming platform and a method applied to a forming cylinder of a 3D printer; the forming platform comprises: the first platform, the second platform and the third platform are equal in height and unequal in diameter; the second platform and the third platform are hollow structures; the three platforms take the first platform as the center, are sequentially sleeved according to the diameter and are in clearance fit with each other, and are placed on an adapter plate connected with the screw rod mechanism; wherein, first platform and keysets fixed connection. And locking pin mechanisms are respectively arranged at the radial contact positions among the forming cylinder, the second platform and the third platform.
The area-adjustable forming platform has the following defects:
1. when the size of the platform is adjusted, each pin locking mechanism needs to be correspondingly adjusted, the operation is troublesome, and faults are easily caused if the pin locking mechanisms are adjusted wrongly;
2. the forming cylinder, the second platform and the third platform are fixed only by the bolt mechanism, so that the connection reliability is poor;
3. during the use of the mechanism, metal powder is easily adsorbed at the pin mechanism, and the pin connection is blocked and needs to be cleaned after a long time;
4. after 3D prints the completion at every turn, when lifting the platform, all need to guarantee that the outside platform is not fixed by bolt mechanism, complex operation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a double forming cylinder device and a powder spreading device for SLM equipment, which can adjust the area of a processing platform and are convenient to use.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a two shaping jar devices for SLM equipment, includes first support body and the power for the power supply of whole device power supply, two shaping jar devices are still including connecting the big shaping jar device and the little shaping jar device of first support body, big shaping jar device includes big shaping jar base plate subassembly and big shaping jar actuating mechanism, big shaping jar actuating mechanism's output is connected big shaping jar base plate subassembly, little shaping jar device includes little shaping jar base plate subassembly and little shaping jar actuating mechanism, little shaping jar actuating mechanism's output is connected little shaping jar base plate subassembly, little shaping jar actuating mechanism fixed connection big shaping jar base plate subassembly, big shaping jar base plate subassembly corresponds and is equipped with the confession the passageway that little shaping jar base plate subassembly removed.
Further, big shaping jar actuating mechanism is including connecting first motor, first ball screw, first fixed plate and the linear guide of first support body, the output of first motor is connected first ball screw, first fixed plate receives first ball screw drives, realizes reciprocating, linear guide's one end is connected big shaping jar base plate subassembly, and the other end is connected first fixed plate.
Further, the linear guide is guided by the first frame body.
Further, big shaping jar device still includes base plate leveling mechanism, big shaping jar base plate subassembly includes big shaping jar base plate mount pad and big shaping jar base plate, big shaping jar actuating mechanism's output is connected big shaping jar base plate mount pad, big shaping jar base plate connection big shaping jar base plate mount pad, the stiff end fixed connection of base plate leveling mechanism big shaping jar base plate mount pad, the output is connected big shaping jar base plate.
Further, base plate leveling mechanism includes direct current turbine motor and connecting plate, the connecting plate is connected respectively big molding cylinder base plate mount pad with direct current turbine motor, direct current turbine motor's output is connected big molding cylinder base plate.
Further, the quantity of base plate leveling mechanism is a plurality of, four angles of big shaping jar base plate subassembly are all installed base plate leveling mechanism.
Further, little shaping jar actuating mechanism is including connecting second motor, second ball screw, second fixed plate and the polished rod of big shaping jar base plate subassembly, the output of second motor is connected second ball screw, the second fixed plate receives second ball screw drives, realizes reciprocating, the one end of polished rod is connected little shaping jar base plate subassembly, and the other end is connected the second fixed plate.
Further, little molding cylinder base plate subassembly includes little molding cylinder base and little molding cylinder base plate, little molding cylinder actuating mechanism's output is connected little molding cylinder base, little molding cylinder base passes through bolted connection little molding cylinder base plate.
Further, the quantity of bolt is a plurality of, four angles of little shaping jar base plate all are connected with the bolt.
Further, the size of the large forming cylinder substrate is 500mm multiplied by 500mm, and the size of the small forming cylinder substrate is 120mm multiplied by 120 mm.
The invention also provides a powder spreading system comprising the double-forming-cylinder device for the SLM equipment, which comprises a powder spreading device and the double-forming-cylinder device, wherein the powder spreading device comprises a second frame body and a power supply for supplying power to the whole mechanism, the powder spreading device further comprises a large powder dropping box, a small powder dropping box, a powder dropping box mounting plate and a powder spreading driving mechanism, the large powder dropping box and the small powder dropping box are connected with the second frame body in a detachable mode, the powder spreading driving mechanism is connected with the second frame body, and the powder spreading driving mechanism drives the powder dropping box mounting plate to move horizontally.
Furthermore, the powder spreading device further comprises large scrapers arranged on two sides of the bottom of the large powder dropping box and small double scrapers arranged on two sides of the bottom of the small powder dropping box.
Further, spread powder actuating mechanism and include third motor, actuating lever and belt drive structure, the output of third motor is connected the actuating lever, the quantity of belt drive structure is two, receives respectively the actuating lever drive, two the belt drive structure is connected respectively the one end of the powder box that falls greatly is used for driving jointly the translation of the powder box that falls greatly.
Compared with the prior art, the invention has the following advantages:
(1) the double-forming-cylinder device comprises a large forming cylinder device and a small forming cylinder device, when the size of a part to be printed is large, the large forming cylinder device is selected to work, otherwise, the small forming cylinder device is selected to work, and operators can conveniently select different forming cylinders according to different sizes of the part; and the large forming cylinder device and the small forming cylinder device are provided with corresponding driving mechanisms, the movement is mutually independent, the device does not need complicated manpower during working, and the operation is simple, convenient, safe and reliable through program control.
(2) The driving mechanisms of the large forming cylinder and the small forming cylinder are both realized by the motor, the ball screw, the fixed plate and the linear guide rail, the ball screw is driven by the motor to lift, and the large forming cylinder and the small forming cylinder have the advantages of high transmission efficiency, accurate positioning and the like.
(3) The large forming cylinder base plate leveling mechanism is arranged to level the large forming cylinder base plate assembly, so that the level of the large forming cylinder base plate is ensured, and the processing quality of SLM equipment is improved.
(4) The base plate leveling mechanism comprises the direct current turbine motor and the connecting plate, leveling is carried out through the direct current turbine motor, and the base plate leveling mechanism has the advantages of fine transmission ratio grading, wide selection range, wide rotating speed spectrum, compact structure, small size and the like.
(5) The small forming cylinder base plate is small in area, horizontal adjustment is conducted on the small forming cylinder base plate through the bolts, and adjustment is convenient.
(6) The invention also provides a powder spreading device matched with the double forming cylinder device, and considering that the double forming cylinder device is provided with a small forming cylinder base plate and a large forming cylinder base plate, redundant powder can fall on the large forming cylinder base plate when the small forming cylinder is used, so that the operation becomes complicated, the large powder falling box and the small powder falling box are arranged, so that the powder spreading device can be respectively used for the powder spreading work of the large forming cylinder and the powder spreading work of the small forming cylinder, and only the small powder falling box needs to be installed or disassembled when the powder spreading device is used, so that the powder spreading device is convenient, quick and efficient.
(7) The powder spreading device disclosed by the invention realizes the movement of the large powder dropping box and the small powder dropping box by driving the belt driving structure through the third motor, and the belt driving structures on two sides of the large powder dropping box are driven by the same third motor, so that the driving synchronization is ensured.
Drawings
FIG. 1 is a perspective view of a dual forming cylinder apparatus of the present invention;
FIG. 2 is a top plan view of the dual forming cylinder apparatus of the present invention;
FIG. 3 is a schematic view of the internal structure of the double forming cylinder apparatus of the present invention;
FIG. 4 is a schematic structural view of a small forming cylinder device of the present invention;
FIG. 5 is a schematic view of the internal structure of the small forming cylinder device of the present invention;
FIG. 6 is a schematic structural view of a base plate assembly of the small forming cylinder of the present invention;
FIG. 7 is a schematic structural view of the powder laying device of the present invention;
FIG. 8 is a front view of the powder layering device of the present invention;
FIG. 9 is a left side view of the powder spreading device of the present invention;
FIG. 10 is a top view of the powder spreading device of the present invention;
FIG. 11 is a bottom view of the powder spreading device of the present invention;
FIG. 12 is an enlarged view of a portion of FIG. 11;
FIG. 13 is a schematic structural view of a dusting system of the present invention;
FIG. 14 is a schematic structural view of a large forming cylinder base plate according to the present invention;
FIG. 15 is a schematic view of a gas circuit adapter of the present invention;
FIG. 16 is a schematic view of a belt press of the present invention;
FIG. 17 is a schematic view of the distribution of the photoelectric limit switches of the present invention;
FIG. 18 is a second schematic view of the powder laying system of the present invention;
FIG. 19 is a schematic view showing the use states of the large compact and the small compact according to the present invention;
in the figure, 1, a double forming cylinder device, 2, a large forming cylinder base plate assembly, 201, a large forming cylinder base plate mounting base, 202, a large forming cylinder base plate, 2021, a first area, 2022, a second area, 3, a large forming cylinder driving mechanism, 301, a first motor, 302, a first ball screw, 303, a first fixing plate, 304, a linear guide rail, 4, a base plate leveling mechanism, 401, a direct current turbine motor, 402, a connecting plate, 5, a small forming cylinder base plate assembly, 501, a small forming cylinder base, 502, a small forming cylinder base plate, 6, a small forming cylinder driving mechanism, 601, a second motor, 602, a second ball screw, 603, a second fixing plate, 604, a polish rod, 7, a bolt, 8, a first frame body, 9, a powder laying device, 10, a second frame body, 11, a large powder laying box, 12, a large scraper, 13, a small powder laying box, 14, a small double scraper, 15, a powder laying driving mechanism, 151, a powder laying driving mechanism, The third motor, 152, the actuating lever, 153, belt drive structure, 16, grating chi, 17, worm gear reduction unit, 18, setting element, 19, heating member, 20, first limit sensor switch, 21, second limit sensor switch, 22, gas circuit adapter, 23, slider, 231, stopper, 232, belt briquetting, 233, shop's powder slip slider, 24, photoelectricity limit switch, 25, the box mounting panel that falls powder.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1
One-and-two forming cylinder device
As shown in fig. 1 and fig. 2, this embodiment provides a double forming cylinder device for an SLM apparatus, including a first frame body 8 and a power supply for supplying power to the whole device, the double forming cylinder device 1 further includes a large forming cylinder device and a small forming cylinder device connected to the first frame body 8, the small forming cylinder device is located in the large forming cylinder device, the large forming cylinder device includes a large forming cylinder substrate assembly 2 and a large forming cylinder driving mechanism 3, an output end of the large forming cylinder driving mechanism 3 is connected to the large forming cylinder substrate assembly 2, the small forming cylinder device includes a small forming cylinder substrate assembly 5 and a small forming cylinder driving mechanism 6, an output end of the small forming cylinder driving mechanism 6 is connected to the small forming cylinder substrate assembly 5, the small forming cylinder driving mechanism 6 is fixedly connected to the large forming cylinder substrate assembly 2, and the large forming cylinder substrate assembly 2 is correspondingly provided with a channel for the small forming cylinder substrate assembly 5 to move.
The double-forming-cylinder device provided by the embodiment can be convenient for operators to select different forming cylinders according to different sizes of parts; in addition, because the SLM machining and forming process is complex, performing large SLM printing when the optimal process parameters are not determined is likely to cause a great deal of money waste. The double-forming-cylinder device is designed into a large forming cylinder and a small forming cylinder, the small forming cylinder is mainly used for searching a processing technology for a certain material, and after the processing technology is determined, the large forming cylinder is used for printing, so that the efficiency and the saving are both considered.
The components are described in detail below.
1. Large forming cylinder driving mechanism 3
As shown in fig. 1 and 3, the large forming cylinder driving mechanism 3 includes a first motor 301 connected to the first frame 8, a first ball screw 302, a first fixing plate 303, and a linear guide 304, wherein an output end of the first motor 301 is connected to the first ball screw 302, the first fixing plate 303 is driven by the first ball screw 302 to move up and down, one end of the linear guide 304 is connected to the large forming cylinder substrate assembly 2, and the other end of the linear guide 304 is connected to the first fixing plate 303. The linear guide 304 is guided by the first frame 8.
In this embodiment, two first motors 301 and two first ball screws 302 are respectively disposed at two ends of the first fixing plate 303, four linear guide rails 304 are disposed, and the first frame 8 is disposed with a flat plate between two ends of the linear guide rails 304, the flat plate is correspondingly disposed with four hollow cylindrical components for the linear guide rails 304 to pass through, so as to guide the linear guide rails 304.
The working principle is as follows: the first ball screw 302 driven by the first motor 301 and symmetrically arranged drives the first fixing plate 303 to move up and down, and then the four linear guide rails 304 mounted on the first fixing plate 303 drive the large forming cylinder substrate assembly 2 above to move up and down in a large range.
2. Large forming cylinder base plate assembly 2
As shown in fig. 4, the large forming cylinder substrate assembly 2 includes a large forming cylinder substrate mounting base 201 and a large forming cylinder substrate 202, the output end of the large forming cylinder driving mechanism 3 is connected to the large forming cylinder substrate mounting base 201, and the large forming cylinder substrate 202 is connected to the large forming cylinder substrate mounting base 201.
Since the SLM process is performed layer by layer, the work substrate for powder spreading must be horizontal, and the SLM equipment is required to level the substrate. Therefore, the large forming cylinder device further comprises a base plate leveling mechanism 4, the fixed end of the base plate leveling mechanism 4 is fixedly connected with the large forming cylinder base plate mounting seat 201, and the output end of the base plate leveling mechanism is connected with the large forming cylinder base plate 202.
The base plate leveling mechanism 4 comprises a direct current turbine motor 401 and a connecting plate 402, the connecting plate 402 is respectively connected with the large forming cylinder base plate mounting base 201 and the direct current turbine motor 401, and the output end of the direct current turbine motor 401 is connected with the large forming cylinder base plate 202.
The number of the base plate leveling mechanisms 4 is three, and one base plate leveling mechanism 4 is arranged at each of three corners of the large forming cylinder base plate assembly 2. The large forming cylinder base plate 202 is leveled by controlling the large forming cylinder base plate 202 to swing left and right and back and forth by the dc turbine motor 401, and the dc turbine motor 401 is not mounted at the fourth corner of the large forming cylinder base plate assembly 2 for confirming the zero point position of the dc turbine motor 401.
3. Small forming cylinder driving mechanism 6
As shown in fig. 3 to 5, the small forming cylinder driving mechanism 6 includes a second motor 601 connected to the large forming cylinder substrate assembly 2, a second ball screw 602, a second fixing plate 603, and a polish rod 604, wherein an output end of the second motor 601 is connected to the second ball screw 602, the second fixing plate 603 is driven by the second ball screw 602 to move up and down, one end of the polish rod 604 is connected to the small forming cylinder substrate assembly 5, and the other end is connected to the second fixing plate 603.
The working principle is as follows: the small forming cylinder base plate assembly 5 moves by means of a second ball screw 602 driven by a second motor 601 beside the small forming cylinder to drive a second fixing plate 603 connected with the small forming cylinder, four polish rods 604 are mounted on the second fixing plate 603, and the four polish rods 604 drive the small forming cylinder base plate assembly 5 of the small forming cylinder to move up and down.
4. Base plate assembly 5 of small forming cylinder
As shown in fig. 6, the small forming cylinder base plate assembly 5 includes a small forming cylinder base 501 and a small forming cylinder base plate 502, the output end of the small forming cylinder driving mechanism 6 is connected to the small forming cylinder base 501, and the small forming cylinder base 501 is connected to the small forming cylinder base plate 502 through a bolt 7.
The number of the bolts 7 is four, and one bolt 7 is connected to each of four corners of the small forming cylinder base plate 502. The levelling of the small forming cylinder is achieved by means of bolts 7 mounted at four corners.
In this embodiment, the large cylinder base plate 202 is 500mm × 500mm in size, and the small cylinder base plate 502 is 120mm × 120mm in size.
5. Other parts
1) As shown in fig. 1, the double forming cylinder device in this embodiment is further provided with a grating ruler 16 for controlling the distance of the up-and-down movement of the large forming cylinder in the vertical movement. Grating chi 16 includes main scale and reading head, and first support body 8 of main scale fixed connection, the first fixed plate 303 of mobilizable is connected to the reading head, and the reading head is installed on the main scale, satisfies the depth of parallelism and the interval requirement of grating chi 16 installation.
2) As shown in fig. 1 and fig. 2, the double forming cylinder device in this embodiment is further provided with two worm gear reducers 17, the two worm gear reducers 17 are respectively connected to two sides of the first frame body 8, and the two worm gear reducers 17 can be meshed with a gear and a synchronous belt on the SLM device to drive the whole double forming cylinder device in this embodiment to move.
3) As shown in fig. 2 and 14, four positioning members 18 are disposed at the top end of the large forming cylinder substrate mounting base 201, the positioning members 18 are rectangular dc electromagnets and their pressing covers, the pressing covers are connected to the rectangular dc electromagnets, four first areas 2021 for mounting the positioning members 18 are correspondingly disposed on the surface of the large forming cylinder substrate 202, the first areas 2021 are first grooves and first through holes, and the large forming cylinder substrate 202 is adsorbed by the four positioning members 18 and is inserted into the corresponding through holes on the surface of the large forming cylinder substrate 202 to realize fixing and positioning.
4) As shown in fig. 2 and 14, the large forming cylinder base plate assembly 2 further includes four heating members 19, the heating members 19 are heating rods and heating rod pressing covers, the heating rod pressing covers are connected with the heating rods, four second areas 2022 for installing the heating members 19 are correspondingly arranged on the surface of the large forming cylinder base plate 202, and the second areas 2022 are second grooves and second through holes. Since the SLM forming technology is to form the powder by directly irradiating the high-energy laser onto the substrate, if the temperature of the substrate is too low, the large temperature gradient in the first several steps of forming process is liable to warp the substrate, so that the forming fails, and therefore the present embodiment improves the 3D forming quality and yield of the SLM device loaded with the present dual forming cylinder device by providing the heating member 19.
5) As shown in fig. 3, the double forming cylinder device further includes a first limit sensor switch 20 and a second limit sensor switch 21, the first limit sensor switch 20 is connected to the second fixing plate 603, a first limit thin plate is correspondingly disposed in the small forming cylinder in the double forming cylinder device, when the first limit sensor switch 20 is driven by the second fixing plate 603 to descend to a certain height and touch the first limit thin plate (not shown in the figure), the maximum distance of downward movement is reached, and the small forming cylinder is prevented from descending too high. Similarly, the second limit sensor switch 21 is connected to the first fixing plate 303, and a second limit sheet is correspondingly arranged in the large forming cylinder in the double-forming cylinder device, so that when the second limit sensor switch 21 is driven by the first fixing plate 303 to fall to a certain height to touch the second limit sheet (not shown in the figure), the maximum distance of downward movement is reached, and the large forming cylinder is prevented from falling to be too high in height.
Second, spread powder system
Since there are two molding bases, if there is only one set of powder dropping and spreading device 9, the excess powder will drop on the large molding cylinder base 202 when the small molding cylinder is used, making the operation cumbersome. Therefore, two different powder falling and feeding devices must be designed for two molded substrates.
As shown in fig. 13 and 18, the present invention also provides a powder spreading system including the double forming cylinder device for the SLM apparatus described above, including the powder spreading device 9 and the double forming cylinder device 1.
As shown in fig. 7 to 10, the powder spreading device 9 includes a second frame body 10 and a power supply for supplying power to the whole mechanism, the powder spreading device 9 further includes a large powder falling box 11, a small powder falling box 13, a powder falling box mounting plate 25 and a powder spreading driving mechanism 15 which are connected to the second frame body 10, the small powder falling box 13 and the large powder falling box 11 can be detachably connected to the powder falling box mounting plate 25, the powder spreading driving mechanism 15 is connected to the second frame body 10, and the powder spreading driving mechanism 15 drives the powder falling box mounting plate 25 to move horizontally.
In order to realize the convenient powder of spreading of big forming mechanism and little forming mechanism homoenergetic, consequently designed two sets of powder boxes that fall: when the large powder falling box is independently arranged on the brackets at two sides, the powder is uniformly sent into the large powder falling box by the powder sending system at the upper side; when the small powder dropping boxes are independently installed on the supports on the two sides, powder is added into the small powder dropping boxes manually to spread the powder.
The attached drawings of the embodiment are used for convenience of description, the large powder dropping box 11 and the small powder dropping box 13 are drawn together, when the powder discharging device is actually used, the states of the large powder dropping box 11 and the small powder dropping box 13 are shown in fig. 19, when the small powder dropping box 13 is used, the small powder dropping box 13 is installed on the powder dropping box installation plate 25, the large powder dropping box 11 is detached, and when the large powder dropping box 11 is used, the large powder dropping box 11 is installed, and the small powder dropping box 13 is detached.
As shown in fig. 11 and 12, the powder spreading device 9 further includes large scrapers 12 provided on both sides of the bottom of the large drop box 11, and small double scrapers 14 provided on both sides of the bottom of the small drop box 13.
The working principle is as follows: the large powder falling box 11 corresponds to the large forming cylinder device in the double forming cylinder device 1, metal powder is sent into the powder falling box by the powder feeding device, and two sides of the bottom of the powder falling box are provided with large scrapers 12 for powder spreading operation; the small powder falling box 13 corresponds to the small forming cylinder device in the double forming cylinder device 1, metal powder is directly poured into the powder falling box during processing, the powder falling amount is controlled by a program at each time, and meanwhile, the small double scrapers 14 are arranged below the small powder falling box for powder paving operation (the groove type powder falling box of the large forming cylinder and the small powder falling box 13 of the small forming cylinder cannot exist at the same time, the small powder falling box 13 needs to be detached when the large powder falling box 11 is installed, and only the small powder falling box 13 needs to be installed on the large powder falling box 11 when the small powder falling box 13 is installed).
As shown in fig. 17, a photoelectric limit switch 24 is disposed on the second frame 10 at a position corresponding to the belt driving mechanism 153 for controlling the forward and backward movement of the powder spreading driving mechanism 15 to prevent the excessive displacement thereof.
As shown in fig. 16, the powder spreading driving mechanism 15 includes a third motor 151, a driving rod 152 and two belt driving structures 153, an output end of the third motor 151 is connected to the driving rod 152, the number of the belt driving structures 153 is two, and the two belt driving structures 153 are respectively driven by the driving rod 152, and are respectively connected to one end of the large powder falling box 11 and used for driving the large powder falling box 11 to move horizontally together. Belt drive structure 153 includes the band pulley, the hold-in range, connecting plate and slider 23, slider 23 includes the stopper 231 that top-down set gradually, belt briquetting 232 and shop's powder slider 233, shop's powder slider 233 installs on the slip track that corresponds the setting on second support body 10, drive the actuating lever 152 that the place ahead links to each other with it by third motor 151, again from this axle drive with it matched with band pulley and then drive the hold-in range and remove, and the hold-in range is through with the connecting plate, the link of belt briquetting and shop's powder slider drives big powder box 11 and removes. The limiting block 231 is used for being matched with the photoelectric limiting switch 24 to realize positioning.
The powder spreading system comprises a powder spreading device 9 and a double-forming-cylinder device 1, the double-forming-cylinder device 1 is installed in the middle of the powder spreading device 9, and a large forming-cylinder substrate 202 in the double-forming-cylinder device 1 corresponds to the positions of a large powder falling box 11 and a small powder falling box 13 in the powder spreading device 9.
As shown in fig. 15, the powder spreading system further comprises a gas path adapter 22 arranged in the powder spreading device 9, the gas path adapter 22 is connected with the second frame body 10, rare gas blowing is carried out on the vacuum environment in the forming chamber of the double-forming cylinder device 1 through the gas path adapter 22 by a fan, black smoke and the like generated in the printing and forming process are filtered, the black smoke and the like are prevented from influencing laser, and the printing precision and quality are reduced.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
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| CN202010074410.6A CN111283193A (en) | 2020-01-22 | 2020-01-22 | A double forming cylinder device for SLM equipment and its powder spreading system |
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Application publication date: 20200616 |