CN112974852A - Powder paving device for SLM type metal 3D printer - Google Patents
Powder paving device for SLM type metal 3D printer Download PDFInfo
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- CN112974852A CN112974852A CN202110175228.4A CN202110175228A CN112974852A CN 112974852 A CN112974852 A CN 112974852A CN 202110175228 A CN202110175228 A CN 202110175228A CN 112974852 A CN112974852 A CN 112974852A
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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
Abstract
The invention provides a powder spreading device for an SLM type metal 3D printer, which is arranged on a bottom plate of a forming chamber; the powder spreading and brushing device comprises a powder spreading and brushing part, a power assembly and an isolation assembly, wherein the power assembly is used for driving the powder spreading and brushing part to move among a powder feeding cylinder, a forming cylinder and a powder leakage groove, and the isolation assembly is used for isolating a powder spreading station of the powder spreading and brushing part from the power assembly; the power assembly is arranged on the bottom plate of the forming chamber; the isolation assembly is arranged on a bottom plate of the forming chamber and positioned between the powder paving station and the power assembly, wherein the powder feeding cylinder, the forming cylinder and the powder leakage groove are arranged on the powder paving station; spread whitewashed one end and be connected with power component, the other end passes isolation component and extends to spread the powder station, realizes that power component drive spreads whitewashed and brush and moves between powder feeding cylinder, shaping jar and hourglass powder groove and spread powder work. The powder spreading device for the SLM type metal 3D printer can effectively prevent black smoke from entering the power assembly, and solves the problem that the powder spreading device is blocked due to accumulation and aggregation of the black smoke, so that the service life is prolonged.
Description
Technical Field
The invention relates to the technical field of 3D printing, in particular to a powder paving device for an SLM type metal 3D printer.
Background
The 3D printing technology is a technology for manufacturing solid parts by accumulating materials layer by layer, and compared with the traditional material removing technology, the technology does not need a cutter and a die, does not need to carry out multi-process processing, has short production period and can easily process parts with complex structures.
Today's 3D printing technologies can be broadly classified into SLS (selective laser sintering), SLM (selective laser melting), FDM (fused deposition modeling), SLA (stereolithography), and EBM (electron beam jetting modeling).
The SLM technology utilizes high-energy laser beams to irradiate metal powder to enable the metal powder to be rapidly melted and cooled and solidified for forming, metal parts can be directly manufactured by using single metal or mixed metal powder, the compactness is close to 100%, the precision of the processed parts is high, the mechanical property is good, and the SLM technology has wide application in the fields of automobiles, aerospace, medical treatment, military industry and the like.
The powder paving device is a key component of the SLM type metal 3D printer, the powder paving device is used for paving metal powder conveyed in the powder feeding cylinder to the position of the forming cylinder, and redundant powder is pushed to the powder leakage groove to be recycled. The powder spreading device directly influences the uniformity of powder spreading, so that the printing quality is influenced, and if the powder spreading device breaks down, the whole printing process is influenced, and even serious damage to equipment is caused. When the metal 3D printer works, the laser scans the metal powder, and carbon elements, low-melting-point alloy elements and impurity elements contained in the metal powder are combusted and gasified to generate black smoke. Although partial black cigarette is taken away by the indoor argon gas of shaping and is absorbed by the filter again, still have partial black cigarette can drift to the power component who spreads the powder device, along with the accumulation gathering of black cigarette, can cause the card of spreading the powder device to die to cause print work to can't continue, probably appear the laser even and shine and make its condition of damaging on spreading the powder device, present metal 3D printer need regularly clear up black cigarette and appear blocking the phenomenon in order to prevent to spread the powder device.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a powder paving device for an SLM type metal 3D printer; this powder paving device effectively prevents black cigarette entering power component, has solved black cigarette accumulation gathering and has caused the dead problem of powder paving device card to increase of service life. In addition, the powder paving device has the advantages of being simple in structure, easy to install and low in cost.
In order to achieve the purpose, the invention is realized by the following technical scheme: a powder spreading device for an SLM type metal 3D printer is arranged on a bottom plate of a forming chamber; the method is characterized in that: the powder spreading and brushing device comprises a powder spreading and brushing part, a power assembly and an isolation assembly, wherein the power assembly is used for driving the powder spreading and brushing part to move among a powder feeding cylinder, a forming cylinder and a powder leakage groove, and the isolation assembly is used for isolating a powder spreading station of the powder spreading and brushing part from the power assembly; the power assembly is arranged on the bottom plate of the forming chamber; the isolation assembly is arranged on a bottom plate of the forming chamber and positioned between the powder paving station and the power assembly, wherein the powder feeding cylinder, the forming cylinder and the powder leakage groove are arranged on the powder paving station; spread whitewashed one end and be connected with power component, the other end passes isolation component and extends to spread the powder station, realizes that power component drive spreads whitewashed and brush and moves between powder feeding cylinder, shaping jar and hourglass powder groove and spread powder work.
The isolation assembly comprises an isolation plate, a cloth strip, two transmission pieces, a synchronous belt wheel III and a synchronous belt II; the two transmission pieces are connected with the isolation plate, and the synchronous belt II is connected with the transmission pieces through a synchronous belt pulley III respectively; the isolating plate is provided with a long notch, the long notch is provided with a convex edge, and two ends of the cloth strip are respectively connected with the two transmission parts and inserted on the convex edge to shield the long notch; the cloth strip is provided with a socket, and the powder spreading brush penetrates through the socket and extends to the powder spreading station.
The two transmission parts comprise an upper fixing frame, a lower fixing frame, a roller, a transmission shaft, a transmission bearing, a transmission shaft pressure bearing cover, a sleeve IV and a sleeve V; two ends of the cloth strip are respectively connected with the roller; the transmission shaft is connected with the upper fixing frame and the lower fixing frame through a transmission bearing, and the transmission shaft is sleeved on the roller; the sleeve is sleeved with the transmission shaft and is connected with the synchronous belt wheel III and the roller; the sleeve is sleeved with the transmission shaft and connected with the roller and the transmission bearing; the transmission shaft pressure bearing cover is connected with the transmission bearing.
In the scheme, the isolating assembly isolates the powder spreading station of the powder spreading brush from the power assembly, so that black smoke can be effectively prevented from entering the power assembly, the problem that the powder spreading device is blocked due to accumulation and aggregation of the black smoke is solved, and the service life is prolonged. The isolating component isolates the powder spreading station of the powder spreading brush from the rear power component, the cloth strip moving in the middle can effectively prevent black smoke from passing through, the isolating component has a simple structure, is easy to install and low in cost, the cloth strip is dragged by the cantilever without an additional power source, and the power component is placed behind the isolating plate, so that the device looks simpler and more attractive, a user can only see the powder spreading brush in the front, and cannot see the complicated power component in the rear.
The power assembly comprises a stepping motor, a motor mounting seat, a transmission mechanism, a synchronous belt I, a synchronous belt wheel II and a synchronous belt tensioning and adjusting mechanism; the synchronous belt I is respectively connected with the synchronous belt wheel I and the synchronous belt wheel II; the stepping motor is arranged on a bottom plate of the forming chamber through a motor mounting seat and is connected with a first synchronous belt wheel through a transmission mechanism to realize connection with the first synchronous belt; the synchronous belt tensioning and adjusting mechanism is installed on a bottom plate of the forming chamber and connected with a synchronous belt wheel II to realize connection with a synchronous belt I.
The transmission mechanism comprises a driving shaft, an upper bearing seat and a lower bearing seat; the driving shaft is connected with the stepping motor through a coupler; the upper bearing block and the lower bearing block are both connected with the motor mounting seat and sleeved with the driving shaft; the driving shaft is connected with the synchronous pulley I;
the transmission mechanism further comprises a first sleeve and a second sleeve; the first sleeve is sleeved on the driving shaft and is connected with the first synchronous belt wheel and a bearing of the upper bearing seat; the second sleeve is sleeved on the driving shaft and connected with the first synchronous belt wheel and a bearing of the lower bearing seat.
The synchronous belt tensioning and adjusting mechanism comprises a tensioning and adjusting frame, a driven shaft bearing gland and a sleeve III; the tensioning adjusting frame is arranged on the bottom plate of the forming chamber; the driven shaft is arranged on the tensioning adjusting frame through a driven shaft bearing and is connected with the synchronous belt wheel II; the sleeve III is sleeved on the driven shaft and is connected with the synchronous belt pulley II and the driven shaft bearing; the driven shaft bearing gland is connected with the driven shaft bearing;
the synchronous belt tensioning and adjusting mechanism further comprises an adjusting plate and a tensioning screw; the adjusting plate is fixed on the bottom plate of the forming chamber, the tensioning screws are respectively connected with the adjusting plate and the tensioning adjusting frame, and the tensioning adjusting frame is driven to move by rotating the adjusting tensioning screws so as to adjust the tensioning force of the first synchronous belt.
The power assembly also comprises a synchronous belt and a pressure plate; the first synchronous belt pressing plate is meshed with the first synchronous belt and presses the first synchronous belt on the powder spreading brush.
The power assembly further comprises a guide rail which is used for being in sliding connection with the powder spreading brush; the guide rail is arranged on the bottom plate of the forming chamber.
The powder spreading brush comprises a cantilever, a cantilever fixing frame, a cantilever connecting plate, a scraping plate mechanism and an adjusting screw; the cantilever is connected with the guide rail in a sliding manner through a cantilever fixing frame and is connected with the synchronous belt I through a cantilever connecting plate; the scraping plate mechanism and the scraping plate mechanism are both in adjustable connection with the cantilever through adjusting screws, and the scraping plate mechanism are adjustable in height to be replaced.
The scraper mechanism comprises a scraper adjusting plate and a scraper, and the scraper is arranged at the bottom of the scraper adjusting plate; the scraping mechanism comprises a scraping adjusting plate and a scraping blade, the scraping blade is arranged at the bottom of the scraping adjusting plate, and the scraping blade is a plurality of metal sheets arranged in a row;
the top of scraper blade regulating plate and doctor-bar regulating plate all is provided with the cylinder that is used for the direction, and the cylinder stretches into the cantilever, and the cylinder cover is equipped with the spring.
The powder spreading brush is provided with two powder spreading structures of a scraping plate and a scraping plate. The scraper blade is used for laying metal powder with good quality and no impurities, and the flat and wide bottom of the scraper blade can flatten the powder, so that the powder laying layer is more flat, solid and uniform. For metal powder containing large and hard impurity particles with poor quality, the scraper can generate hard impact with impurities, and the laid powder paving layer has pits and gullies, so that the scraper can be damaged by collision, even the scraper is clamped by the impurity particles, and the powder paving quality and normal work are seriously influenced. The scraping blade is a thin metal steel sheet, the bottom of the scraping blade is cut into steel sheet strips which are densely arranged, the scraping blade has certain flexibility, and when the scraping blade meets large and hard impurity particles in the powder spreading process, the steel sheet strips in contact with the scraping blade can be temporarily bent to pass over the impurity particles and then return to a normal state due to the flexibility of the steel sheet strips, so that the hard impact of the scraping blade is avoided. Some parts have high precision requirements, the used metal powder has high purity and does not contain impurity particles, and the powder is spread by a scraper, and other parts have low precision requirements, and the used powder has low purity and contains impurities, and the powder is spread by a scraper.
The scraper is fixed on the scraper adjusting plate, two protruding cylinders are arranged at the upper ends of the scraper adjusting plate and are inserted into corresponding holes on the cantilever to limit the freedom degree of the scraper adjusting plate and prevent the scraper adjusting plate from shaking and rotating back and forth, and the function of the guide rail is equivalent. The cylinder is sleeved with a spring which is in a compressed state and used for tightly propping against the doctor blade adjusting plate, the scraper adjusting plate and the cantilever, the spring is used for pushing the doctor blade adjusting plate and the scraper adjusting plate to move downwards when the adjusting screw is loosened to enable the doctor blade adjusting plate and the scraper adjusting plate to move downwards more easily, and the spring can also prevent the doctor blade adjusting plate and the scraper adjusting plate from moving upwards.
The powder spreading process of the powder spreading device comprises the following steps: the powder feeding cylinder pushes the metal powder to a bottom plate of the forming chamber, the powder paving brush lays the metal powder to the position of the forming cylinder, and the redundant powder is pushed to the powder leakage groove to be recycled. The stepping motor is fixed on the motor mounting frame, a motor shaft of the stepping motor is connected with the driving shaft through a coupler, bearings are arranged at the upper end and the lower end of the driving shaft, and the bearings are fixed on the upper bearing block and the lower bearing block respectively. A first sleeve is arranged between the first synchronous pulley and a bearing of the upper bearing seat, a second sleeve is arranged between the first synchronous pulley and a bearing of the lower bearing seat, and the first sleeve and the second sleeve are used for keeping the distance between the first synchronous pulley and the two bearings and preventing the first synchronous pulley from moving up and down.
The transmission mechanism connected with the motor is synchronous belt transmission, and the synchronous belt transmission has the following advantages compared with the traditional common lead screw transmission of the powder spreading device: simple structure, simple to operate, noise are little, with low costs, beat the metal and can accumulate and black cigarette and dust on spreading the powder device after 3D printer works for a long time, and these black cigarettes adsorb with the dust and lead to the lead screw to be blocked very easily on the screw thread surface of lead screw, and synchronous belt drive mechanism can stabilize normal work for a long time.
One side of the first synchronous belt pressing plate is provided with a tooth form meshed with the first synchronous belt, so that the first synchronous belt can be effectively prevented from sliding, the first synchronous belt is tightly pressed on the cantilever connecting plate by the first synchronous belt pressing plate, and the cantilever connecting plate is fixed with the cantilever, so that the cantilever moves along with the first synchronous belt. The synchronous belt can only transmit the transmission force in the horizontal direction and cannot bear the gravity of the spreading and painting and the suspension arm, so a guide rail must be added, and the guide rail is used for bearing the gravity of the spreading and painting and the suspension arm and guiding the movement. The cantilever is fixed on the sliding block through the cantilever fixing frame, the sliding block can horizontally slide on the guide rail, the sliding process is stable, and the noise is low. The stability of the cantilever is increased by adopting the two guide rails, so that the powder spreading process is stable and is not easy to shake.
The bottom of the synchronous belt tensioning frame is provided with a long through hole, so that the position can be conveniently adjusted after a screw is inserted, a threaded hole at the tail part is connected with the tensioning screw, the adjusting plate is fixed on the bottom plate of the forming chamber, and the tensioning screw on the adjusting plate is screwed down to move the synchronous belt tensioning frame so as to tension the synchronous belt. The upper end of the synchronous belt tensioning frame is provided with a driven shaft bearing gland, the driven shaft bearing gland is tightly pressed by screwing a screw on the driven shaft bearing gland, and the synchronous belt tensioning frame has the function of ensuring that adjacent parts, namely the driven shaft bearing and the driven shaft, the driven shaft and the synchronous pulley II, the synchronous pulley II and the sleeve III, and the sleeve III and the driven shaft bearing, are tightly contacted in the vertical direction, so that the parts rotate along with the step belt and are also used for preventing the parts from moving up and down.
The black smoke that produces when printing drifts to and falls on power component and can influence the normal work of each part, influences its life, still can cause the card of device to die for a long time. The isolating assembly designed by the invention isolates the powder spreading station for spreading the powder from the power assembly. The centre of division board has the long notch, and the chimb of L shape has been welded to the upper and lower edge of long notch, and flexible cloth is inserted to the centre, has a socket as big as the cantilever width in the middle of the cloth to be used for passing through the cantilever, glues together between the two with glue behind the socket that the cantilever inserted the cloth, can be used for adding stifled space to the cloth can become hard after the glue on the cloth solidifies around the cantilever, and the cantilever drags the cloth more easily and removes.
The powder spreading brush is simple in structure and has two powder spreading modes, the heights of the scraping blade and the scraping plate can be conveniently adjusted by screwing or loosening the adjusting screw, and when the scraping blade is used for spreading powder, the scraping blade is adjusted to be lower and the scraping plate is adjusted to be higher; when the scraper is used for spreading powder, the scraper is adjusted to be high, and the scraper is adjusted to be low.
The powder paving device has the advantages that:
(1) the motor shaft of the stepping motor is connected with the driving shaft through the coupler, and the tension force of the first synchronous belt is applied to the driving shaft instead of the motor shaft, so that the motor shaft can be protected, the motor shaft is prevented from being broken, and the service life is prolonged.
(2) Compared with the traditional lead screw transmission, the synchronous belt transmission has the advantages of simple structure, convenience in installation, low noise and low cost, and is not easy to be blocked by black smoke and dust.
(3) Adopt two guide rails, the motion is more stable, adopts the silence slider, and the noise is little.
(4) Isolation component keeps apart the powder station of spreading the brush and power component, prevents that black cigarette from getting into power component, and the effectual normal work that black cigarette can influence each part of having solved influences its life, still can cause the dead problem of card of device for a long time. Simple structure, easy installation, low cost and no need of additional power source.
(5) The powder spreading device is more concise and beautiful in appearance, and a user can only see the powder spreading brush at the front part and cannot see the complicated power assembly at the rear part.
(6) The bottom of the wiper blade is cut into densely arranged steel strips, which have certain flexibility and can cross large and hard impurity particles.
(7) The powder spreading and brushing has two powder spreading modes, is a multifunctional powder spreading and brushing, can be selected according to requirements, the metal powder with good spreading quality is spread by adopting a scraper, and the powder with poor spreading quality and containing large and hard impurity particles is spread by using a scraper.
(8) The switching of two kinds of shop powder modes is very convenient, thereby only needs through adjusting screw alright adjust doctor-bar and scraper blade height and switch.
Compared with the prior art, the invention has the following advantages and beneficial effects: the powder spreading device for the SLM type metal 3D printer can effectively prevent black smoke from entering the power assembly, and solves the problem that the powder spreading device is blocked due to accumulation and aggregation of the black smoke, so that the service life is prolonged.
Drawings
FIG. 1 is a schematic view of a powder spreading device of the present invention;
FIG. 2 is a schematic view of the power assembly of the powder spreading device of the present invention connected to a cantilever;
FIG. 3 is a schematic internal view of the power assembly of the powder spreading device of the present invention;
FIG. 4 is a first schematic view of an isolation assembly of the powder spreading device of the present invention;
FIG. 5 is a second schematic view of the isolating assembly of the powder spreading device of the present invention;
FIG. 6 is a schematic view of the interior of the isolating assembly of the powder spreading device of the present invention;
FIG. 7 is a schematic view of a powder spreading assembly of the powder spreading device of the present invention;
wherein, 1 is a power component, 1.1 is a stepping motor, 1.2 is a motor mounting seat, 1.3 is a synchronous belt I, 1.4 is a synchronous belt I, 1.5 is a synchronous belt II, 1.6 is a driving shaft, 1.7 is an upper bearing seat, 1.8 is a lower bearing seat, 1.9 is a sleeve I, 1.10 is a sleeve II, 1.11 is a tensioning adjusting frame, 1.12 is a driven shaft, 1.13 is a driven shaft bearing, 1.14 is a driven shaft bearing gland, 1.15 is a sleeve III, 1.16 is an adjusting plate, 1.17 is a tensioning screw, 1.18 is a synchronous belt one-pressing plate, 1.19 is a guide rail, 2 is a powder spreading brush, 2.1 is a cantilever, 2.2 is a cantilever fixing frame, 2.3 is a cantilever connecting plate, 2.4 is an adjusting screw, 2.5 is an adjusting plate, 2.6 is a scraper, 2.7 is a scraper adjusting plate, 2.8 is a scraper, 2.9 is a spring, 3.10 is a spring, 3.4 is a cylindrical powder spreading component, 4.4 is a cylindrical powder spreading plate, 4.4 is a synchronous belt pulley, 4.4 is a synchronous belt spreading plate, 4.4 is a synchronous belt pulley, 4 is a separating, 4.6 is a socket, 4.7 is an upper fixing frame, 4.8 is a lower fixing frame, 4.9 is a roller, 4.10 is a transmission shaft, 4.11 is a transmission bearing, 4.12 is a transmission shaft pressure bearing cover, 4.13 is a sleeve IV, 4.14 is a sleeve V, 5 is a forming chamber bottom plate, 6 is a powder feeding cylinder, 7 is a forming cylinder and 8 is a powder leakage groove.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Examples
As shown in fig. 1 to 7, the powder spreading device for the SLM type metal 3D printer according to the present invention is installed on the bottom plate 5 of the forming chamber, which comprises a powder spreading brush 2, a power component 1 for driving the powder spreading brush to move among a powder feeding cylinder 6, a forming cylinder 7 and a powder leakage groove 8, and an isolation component 4 for isolating a powder spreading station 3 of the powder spreading brush 2 from the power component 1, wherein the power component 1 is arranged on a bottom plate 5 of a forming chamber, the isolation component 4 is arranged on the bottom plate 5 of the forming chamber and is positioned between the powder spreading station 3 and the power component 1, wherein, send whitewashed jar 6, shaping jar 7 and leak whitewashed groove 8 and set up on shop's powder station 3, spread whitewashed 2 one end and be connected with power component 1, the other end passes isolation component 4 and extends shop's powder station 3, realizes that power component 1 drive spreads whitewashed 2 and moves between send whitewashed jar 6, shaping jar 7 and leak whitewashed groove 8 and spread whitewashed work.
Specifically, the power assembly 1 includes a stepping motor 1.1, a motor mounting base 1.2, a transmission mechanism, a first synchronous belt 1.3, a first synchronous belt pulley 1.4, a second synchronous belt pulley 1.5 and a synchronous belt tensioning adjusting mechanism, wherein the first synchronous belt 1.3 is respectively connected with the first synchronous belt pulley 1.4 and the second synchronous belt pulley 1.5, the stepping motor 1.1 is installed on the forming chamber bottom plate 5 through the motor mounting base 1.2 and is connected with the first synchronous belt pulley 1.4 through the transmission mechanism to realize connection with the first synchronous belt 1.3, and the synchronous belt tensioning adjusting mechanism is installed on the forming chamber bottom plate 5 and is connected with the second synchronous belt pulley 1.5 to realize connection with the first synchronous belt 1.3.
The transmission mechanism comprises a driving shaft 1.6, an upper bearing seat 1.7, a lower bearing seat 1.8, a first sleeve 1.9 and a second sleeve 1.10, wherein the driving shaft 1.6 is connected with a stepping motor 1.1 through a coupler, the upper bearing seat 1.7 and the lower bearing seat 1.8 are both connected with a motor mounting seat 1.2, the driving shaft 1.6 is sleeved, and the driving shaft 1.6 is connected with a first synchronous belt pulley 1.4. The sleeve I1.9 is sleeved with the driving shaft 1.6 and is connected with the synchronous pulley I1.4 and a bearing of the upper bearing seat 1.7, and the sleeve II 1.10 is sleeved with the driving shaft 1.6 and is connected with the synchronous pulley I1.4 and a bearing of the lower bearing seat 1.8.
The synchronous belt tensioning and adjusting mechanism comprises a tensioning and adjusting frame 1.11, a driven shaft 1.12, a driven shaft bearing 1.13, a driven shaft bearing gland 1.14, a sleeve III 1.15, an adjusting plate 1.16 and a tensioning screw 1.17, wherein the tensioning and adjusting frame 1.11 is arranged on a forming chamber bottom plate 5, the driven shaft 1.12 is arranged on the tensioning and adjusting frame 1.11 through the driven shaft bearing 1.13 and is connected with a synchronous pulley II 1.5, the sleeve III 1.15 is sleeved on the driven shaft 1.12 and is connected with the synchronous pulley II 1.5 and the driven shaft bearing 1.13, and the driven shaft bearing gland 1.14 is connected with the driven shaft bearing 1.13. The adjusting plate 1.16 is fixed on the forming chamber bottom plate 5, and the tensioning screw 1.17 is respectively connected with the adjusting plate 1.16 and the tensioning adjusting frame 1.11, so that the tensioning adjusting frame 1.11 is driven to move by rotating the adjusting tensioning screw 1.17, and the tensioning force of the first synchronous belt 1.3 is adjusted. The power assembly 1 further comprises a first synchronous belt pressing plate 1.18 and a guide rail 1.19 used for being in sliding connection with the powder spreading brush 2, the first synchronous belt pressing plate 1.18 is in meshed connection with the first synchronous belt 1.3, and the first synchronous belt pressing plate 1.18 presses the first synchronous belt 1.3 on the powder spreading brush 2. While the guide rails 1.19 are arranged on the forming chamber floor 5.
The isolation assembly 4 comprises an isolation plate 4.1, a cloth strip 4.2, two transmission parts, a synchronous pulley III 4.3 and a synchronous belt II 4.4, wherein the two transmission parts are connected with the isolation plate 4.1, the synchronous belt II 4.4 is respectively connected with the transmission parts through the synchronous pulley III 4.3, the isolation plate 4.1 is provided with a long notch, L-shaped convex edges 4.5 are welded on the upper edge and the lower edge of the long notch, two ends of the cloth strip 4.2 are respectively connected with the two transmission parts and inserted on the convex edges 4.5 to shield the long notch, the cloth strip 4.2 is provided with a socket 4.6, and the powder spreading brush 2 penetrates through the socket 4.6 to extend to a powder spreading station 3.
The two transmission parts respectively comprise an upper fixing frame 4.7, a lower fixing frame 4.8, a roller 4.9, a transmission shaft 4.10, a transmission bearing 4.11, a transmission shaft pressure bearing cover 4.12, a sleeve IV 4.13 and a sleeve V4.14, wherein two ends of the cloth strip 4.2 are respectively connected with the roller 4.9, the transmission shaft 4.10 is connected with the upper fixing frame 4.7 and the lower fixing frame 4.8 through the transmission bearing 4.11, the transmission shaft 4.10 is sleeved on the roller 4.9, the transmission shaft 4.10 is sleeved on the sleeve IV 4.13 and is connected with a synchronous belt wheel III 4.3 and the roller 4.9, the transmission shaft 4.10 is sleeved on the sleeve V4.14 and is connected with the roller 4.9 and the transmission bearing 4.11, and the transmission bearing pressure bearing cover 4.12 is connected with the transmission bearing 4.11.
The isolating component 4 isolates the powder spreading station 3 of the powder spreading brush 3 from the power component 1 at the back, the cloth strip 4.2 moving in the middle can effectively prevent black smoke from passing through, the structure is simple, the installation is easy, the cost is low, the cloth strip 4.2 is dragged by the cantilever, no additional power source is needed, and the power component 1 is placed at the back of the isolating plate 4.1, so that the device looks simpler and more beautiful, a user can only see the powder spreading brush 2 at the front, and cannot see the power component 1 with complicated back.
The powder spreading brush 2 comprises a cantilever 2.1, a cantilever fixing frame 2.2, a cantilever connecting plate 2.3, a scraping plate mechanism and an adjusting screw 2.4, wherein the cantilever 2.1 is in sliding connection with a guide rail 1.19 through the cantilever fixing frame 2.2 and is connected with a synchronous belt I1.3 through the cantilever connecting plate 2.3, and the scraping plate mechanism are in adjustable connection with the cantilever 2.1 through the adjusting screw 2.4, so that the scraping plate mechanism and the scraping plate mechanism can be adjusted in height for replacement.
This scraper mechanism includes scraper blade regulating plate 2.5 and scraper blade 2.6, and scraper blade 2.6 sets up in scraper blade regulating plate 2.5's bottom, and doctor-bar mechanism includes doctor-bar regulating plate 2.7 and doctor-bar 2.8, and doctor-bar 2.8 sets up in the bottom of doctor-bar regulating plate 2.7, and doctor-bar 2.8 is the foil that a plurality of blocks were arranged. The top of scraper blade regulating plate 2.5 and doctor-bar regulating plate 2.7 all is provided with the cylinder 2.9 that is used for the direction, and cylinder 2.9 stretches into cantilever 2.1, and the cylinder 2.9 cover is equipped with spring 2.10.
The powder spreading brush 2 of the invention has two powder spreading structures of a scraping plate 2.6 and a scraping plate 2.8. The scraper 2.6 is used for laying high-quality metal powder without impurities, and the flat and wide bottom of the scraper 2.6 can flatten the powder, so that a powder laying layer is more flat, solid and uniform. For metal powder containing large and hard impurity particles with poor quality, the scraper 2.6 can generate hard impact with the impurities, and the laid powder laying layer has pits and gullies, so that the scraper 2.6 can be damaged by collision, even the scraper 2.6 is clamped by the impurity particles, and the powder laying quality and normal work are seriously influenced. The scraping blade 2.8 is a thin metal steel sheet, the bottom of the scraping blade is cut into steel sheet strips which are densely arranged, the scraping blade has certain flexibility, and when the scraping blade meets large and hard impurity particles in the powder spreading process, the steel sheet strips in contact with the scraping blade can be temporarily bent to pass over the impurity particles due to the flexibility of the steel sheet strips and then return to a normal state, so that the hard impact of the scraping blade is avoided. Some parts have high precision requirements, the used metal powder has high purity and does not contain impurity particles, the scraper blade 2.6 is used for spreading the powder, and other parts have lower precision requirements, the used powder has low purity and contains impurities, and the scraper blade 2.8 is used for spreading the powder.
The scraper 2.8 of the invention is fixed on a scraper adjusting plate 2.7, the scraper 2.6 is fixed on a scraper adjusting plate 2.5, the upper ends of the scraper adjusting plate 2.7 and the scraper adjusting plate 2.5 are respectively provided with two protruding cylinders 2.9 which are inserted into corresponding holes on the cantilever 2.1, so as to limit the freedom degree of the scraper adjusting plate 2.7 and the scraper adjusting plate 2.5, prevent the scraper adjusting plate from shaking and rotating back and forth, left and right, and act as a guide rail. The cylinder 2.9 is sleeved with a spring 2.10, the spring 2.10 is in a compression state and is used for tightly supporting the scraper adjusting plate 2.7, the scraper adjusting plate 2.5 and the cantilever 2.1, the spring 2.10 is used for pushing the scraper adjusting plate 2.7 and the scraper adjusting plate 2.5 to move downwards when the adjusting screw 2.4 is loosened to enable the scraper adjusting plate 2.7 and the scraper adjusting plate 2.5 to move downwards more easily, and the spring 2.10 can also prevent the scraper adjusting plate 2.7 and the scraper adjusting plate 2.5 from moving upwards.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (8)
1. A powder spreading device for an SLM type metal 3D printer is arranged on a bottom plate of a forming chamber; the method is characterized in that: the powder spreading and brushing device comprises a powder spreading and brushing part, a power assembly and an isolation assembly, wherein the power assembly is used for driving the powder spreading and brushing part to move among a powder feeding cylinder, a forming cylinder and a powder leakage groove, and the isolation assembly is used for isolating a powder spreading station of the powder spreading and brushing part from the power assembly; the power assembly is arranged on the bottom plate of the forming chamber; the isolation assembly is arranged on a bottom plate of the forming chamber and positioned between the powder paving station and the power assembly, wherein the powder feeding cylinder, the forming cylinder and the powder leakage groove are arranged on the powder paving station; one end of the powder spreading brush is connected with the power assembly, and the other end of the powder spreading brush penetrates through the isolation assembly and extends to a powder spreading station, so that the power assembly drives the powder spreading brush to move among the powder feeding cylinder, the forming cylinder and the powder leakage groove to perform powder spreading work;
the isolation assembly comprises an isolation plate, a cloth strip, two transmission pieces, a synchronous belt wheel III and a synchronous belt II; the two transmission pieces are connected with the isolation plate, and the synchronous belt II is connected with the transmission pieces through a synchronous belt pulley III respectively; the isolating plate is provided with a long notch, the long notch is provided with a convex edge, and two ends of the cloth strip are respectively connected with the two transmission parts and inserted on the convex edge to shield the long notch; the cloth strip is provided with a socket, and the powder spreading brush penetrates through the socket and extends to a powder spreading station;
the two transmission parts comprise an upper fixing frame, a lower fixing frame, a roller, a transmission shaft, a transmission bearing, a transmission shaft pressure bearing cover, a sleeve IV and a sleeve V; two ends of the cloth strip are respectively connected with the roller; the transmission shaft is connected with the upper fixing frame and the lower fixing frame through a transmission bearing, and the transmission shaft is sleeved on the roller; the sleeve is sleeved with the transmission shaft and is connected with the synchronous belt wheel III and the roller; the sleeve is sleeved with the transmission shaft and connected with the roller and the transmission bearing; the transmission shaft pressure bearing cover is connected with the transmission bearing.
2. Powder spreading device for SLM-type metal 3D printer according to claim 1 characterized in that: the power assembly comprises a stepping motor, a motor mounting seat, a transmission mechanism, a synchronous belt I, a synchronous belt wheel II and a synchronous belt tensioning and adjusting mechanism; the synchronous belt I is respectively connected with the synchronous belt wheel I and the synchronous belt wheel II; the stepping motor is arranged on a bottom plate of the forming chamber through a motor mounting seat and is connected with a first synchronous belt wheel through a transmission mechanism to realize connection with the first synchronous belt; the synchronous belt tensioning and adjusting mechanism is installed on a bottom plate of the forming chamber and connected with a synchronous belt wheel II to realize connection with a synchronous belt I.
3. Powder spreading device for SLM-type metal 3D printer according to claim 2 characterized in that: the transmission mechanism comprises a driving shaft, an upper bearing seat and a lower bearing seat; the driving shaft is connected with the stepping motor through a coupler; the upper bearing block and the lower bearing block are both connected with the motor mounting seat and sleeved with the driving shaft; the driving shaft is connected with the synchronous pulley I;
the transmission mechanism further comprises a first sleeve and a second sleeve; the first sleeve is sleeved on the driving shaft and is connected with the first synchronous belt wheel and a bearing of the upper bearing seat; the second sleeve is sleeved on the driving shaft and connected with the first synchronous belt wheel and a bearing of the lower bearing seat.
4. Powder spreading device for SLM-type metal 3D printer according to claim 2 characterized in that: the synchronous belt tensioning and adjusting mechanism comprises a tensioning and adjusting frame, a driven shaft bearing gland and a sleeve III; the tensioning adjusting frame is arranged on the bottom plate of the forming chamber; the driven shaft is arranged on the tensioning adjusting frame through a driven shaft bearing and is connected with the synchronous belt wheel II; the sleeve III is sleeved on the driven shaft and is connected with the synchronous belt pulley II and the driven shaft bearing; the driven shaft bearing gland is connected with the driven shaft bearing;
the synchronous belt tensioning and adjusting mechanism further comprises an adjusting plate and a tensioning screw; the adjusting plate is fixed on the bottom plate of the forming chamber, the tensioning screws are respectively connected with the adjusting plate and the tensioning adjusting frame, and the tensioning adjusting frame is driven to move by rotating the adjusting tensioning screws so as to adjust the tensioning force of the first synchronous belt.
5. Powder spreading device for SLM-type metal 3D printer according to claim 2 characterized in that: the power assembly also comprises a synchronous belt and a pressure plate; the first synchronous belt pressing plate is meshed with the first synchronous belt and presses the first synchronous belt on the powder spreading brush.
6. Powder spreading device for SLM-type metal 3D printer according to claim 2 characterized in that: the power assembly further comprises a guide rail which is used for being in sliding connection with the powder spreading brush; the guide rail is arranged on the bottom plate of the forming chamber.
7. Powder spreading device for SLM-type metal 3D printers according to claim 6, characterized in that: the powder spreading brush comprises a cantilever, a cantilever fixing frame, a cantilever connecting plate, a scraping plate mechanism and an adjusting screw; the cantilever is connected with the guide rail in a sliding manner through a cantilever fixing frame and is connected with the synchronous belt I through a cantilever connecting plate; the scraping plate mechanism and the scraping plate mechanism are both in adjustable connection with the cantilever through adjusting screws, and the scraping plate mechanism are adjustable in height to be replaced.
8. Powder spreading device for SLM-type metal 3D printers according to claim 7, characterized in that: the scraper mechanism comprises a scraper adjusting plate and a scraper, and the scraper is arranged at the bottom of the scraper adjusting plate; the scraping mechanism comprises a scraping adjusting plate and a scraping blade, the scraping blade is arranged at the bottom of the scraping adjusting plate, and the scraping blade is a plurality of metal sheets arranged in a row;
the top of scraper blade regulating plate and doctor-bar regulating plate all is provided with the cylinder that is used for the direction, and the cylinder stretches into the cantilever, and the cylinder cover is equipped with the spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110175228.4A CN112974852A (en) | 2021-02-07 | 2021-02-07 | Powder paving device for SLM type metal 3D printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110175228.4A CN112974852A (en) | 2021-02-07 | 2021-02-07 | Powder paving device for SLM type metal 3D printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112974852A true CN112974852A (en) | 2021-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110175228.4A Withdrawn CN112974852A (en) | 2021-02-07 | 2021-02-07 | Powder paving device for SLM type metal 3D printer |
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| Country | Link |
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| CN (1) | CN112974852A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114570951A (en) * | 2022-03-21 | 2022-06-03 | 南京铖联激光科技有限公司 | 3D printer is with evenly spreading powder device |
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| DE10104732C1 (en) * | 2001-02-02 | 2002-06-27 | Fraunhofer Ges Forschung | Device for selective laser melting of metallic materials comprises a heating plate arranged on a platform with side walls, and an insulating layer thermally insulated from the platform |
| CN207615658U (en) * | 2017-11-23 | 2018-07-17 | 韶关学院 | A kind of selective laser fusing 3D printing power spreading device |
| CN110181054A (en) * | 2019-07-01 | 2019-08-30 | 广州大学 | A kind of power spreading device for SLM type metal 3D printer |
| CN110181053A (en) * | 2019-07-01 | 2019-08-30 | 广州大学 | A kind of powder feeding and spreading device for SLM type metal 3D printer |
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2021
- 2021-02-07 CN CN202110175228.4A patent/CN112974852A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10104732C1 (en) * | 2001-02-02 | 2002-06-27 | Fraunhofer Ges Forschung | Device for selective laser melting of metallic materials comprises a heating plate arranged on a platform with side walls, and an insulating layer thermally insulated from the platform |
| CN207615658U (en) * | 2017-11-23 | 2018-07-17 | 韶关学院 | A kind of selective laser fusing 3D printing power spreading device |
| CN110181054A (en) * | 2019-07-01 | 2019-08-30 | 广州大学 | A kind of power spreading device for SLM type metal 3D printer |
| CN110181053A (en) * | 2019-07-01 | 2019-08-30 | 广州大学 | A kind of powder feeding and spreading device for SLM type metal 3D printer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114570951A (en) * | 2022-03-21 | 2022-06-03 | 南京铖联激光科技有限公司 | 3D printer is with evenly spreading powder device |
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Application publication date: 20210618 |
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