CN209888156U - Bidirectional quantitative powder supply device for additive manufacturing - Google Patents

Abstract

The utility model discloses a bidirectional quantitative powder supply device for additive manufacturing, which comprises a powder supply box for storing powder, and a quantitative powder supply mechanism which is connected to the bottom of the powder supply box and communicated with the inner cavity of the powder supply box for quantitative powder supply, wherein the bottom of the quantitative powder supply mechanism is provided with a powder falling groove for supplying powder; the utility model discloses a ration supplies powder mechanism to realize the accurate flow control of powder, but the area of laying of accurate control powder slides to when the end, can guarantee that inside powder falls to the greatest extent at the scraper mount pad, avoids invalid shop's powder operation, has improved the utilization ratio of powder, has reduced the powder that needs to be retrieved, has improved shop's powder efficiency, and the rotation that supplies the powder roller bearing can realize the effect of initiatively drawing the powder, avoids supplying the powder in the powder box to pile up the not smooth phenomenon of flow that causes for a long time and appears.

Description

Bidirectional quantitative powder supply device for additive manufacturing

Technical Field

The utility model belongs to the technical field of the vibration material disk makes, in particular to vibration material disk makes two-way ration and supplies powder device.

Background

Based on the process characteristics of additive manufacturing layer-by-layer processing, a new layer of powder is spread before scanning and processing each time for sintering; the large additive manufacturing equipment has large molding area, large structural span of the powder spreading scraper and long stroke, and has higher requirements on the structural rigidity and the working efficiency of the scraper device; in the prior art, the powder supply amount of the powder paving device at each time is difficult to effectively control in the powder paving process, so that the phenomenon of powder shortage or powder excess is easily caused in the powder paving process, and the powder paving effect is influenced.

Therefore, in order to solve the above problems, there is a need for a bidirectional quantitative powder supply device for additive manufacturing, which can realize accurate powder supply and improve powder laying quality.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a two-way ration powder supply device of vibration material disk can realize that the accuracy supplies the powder to improve and spreads the powder quality.

The utility model discloses a two-way ration of vibration material disk supplies powder device, including the confession powder box that is used for storing the powder, connect in confession powder box bottom and with supply the powder box inner chamber link up the ration that is used for the ration to supply the powder and supply powder mechanism, the powder groove that falls that is used for supplying the powder is offered to ration powder supply mechanism bottom.

Further, the ration supplies whitewashed device supplies whitewashed roller bearing to use its self axis to be center pivoted second drive arrangement including supplying powder roller bearing mount pad, supplying powder roller bearing and drive, supply powder roller bearing mount pad to connect in supplying the powder box bottom, supply to set up the columnar powder chamber that supplies on the powder roller bearing mount pad, supply powder roller bearing diameter and supply powder chamber diameter looks adaptation and rotatable the installing in supplying the powder intracavity, supply powder roller bearing mount pad top to set up and make and supply the powder box inner chamber and supply the groove of accepting that the powder chamber link up, the groove of falling is seted up and is supplied powder roller bearing mount pad below, supply the global evenly distributed of powder roller bearing to supply the powder groove along the ration of axial extension.

Further, supply the powder device still including supplying the powder board, supply the vertical extension of powder board to connect in supplying powder roller bearing mount pad bottom and cover in the whitewashed groove bottom that falls, supply to set up on the powder board and supply the powder groove that link up with the whitewashed groove that falls.

Further, the bottom of the powder supply box is provided with a powder falling part with a downward concave radial section in a circular arc shape, and the receiving groove is formed in the bottom of the powder falling part and extends along the axial direction.

Further, the powder supply box is internally provided with a rotating shaft coaxial with the powder falling part, the rotating shaft is connected with an opening and closing door used for opening or closing the receiving groove in a transmission fit mode, and the opening and closing door is attached to the inner side face of the powder falling part and is matched with the inner side face of the powder falling part.

Further, the side wall of at least one side of the powder supply box is inclined downwards to form a guide wall, so that the bottom of the powder supply box is reduced downwards.

Furthermore, the two ends of the powder supply cavity are provided with mounting holes which have the diameter larger than the inner diameter of the powder supply cavity and are used as bearing seats, and the two ends of the powder supply rolling shaft are matched in the mounting holes in a rotating mode through bearings.

Further, the bottom of the powder supply box is connected with a horizontally extending mounting plate, and a triangular area is formed between the mounting plate and the guide wall and outside the powder supply box.

Furthermore, a plurality of reinforcing ribs which connect the mounting plate and the guide wall into a whole are arranged in a triangular area formed between the mounting plate and the guide wall.

Further, the second drive arrangement is including installing the driving piece that is used for providing power on the workstation and passing to the intermediate drive spare that supplies the powder roller bearing with power through the driving piece drive, supply powder roller bearing tip be provided with be used for with intermediate drive spare complex polygon transmission lug, be provided with the transmission hole with polygon transmission lug looks adaptation on the intermediate drive spare, polygon transmission lug is located the transmission hole.

The utility model has the advantages that:

the utility model discloses a quantitative powder supply device realizes the accurate flow control of powder, can the accurate laying area of control powder, when the scraper mount pad slides to the end, can guarantee that the inside powder falls to the utmost extent, avoids invalid shop's powder operation, has improved the utilization ratio of powder, has reduced the powder that needs to be retrieved, has improved shop's powder efficiency, and the rotation of the powder supply roller bearing can realize the effect of initiatively drawing the powder, avoids the powder in the powder supply box to pile up the phenomenon that the flow is not smooth that causes for a long time and appears;

the utility model ensures that the powder falling part is filled with powder all the time through the guiding of the side wall, and when the powder is extracted by matching with the powder supply roller, the powder amount extracted by each quantitative powder supply groove is maintained in a smaller error range, thereby improving the powder supply precision; when the rotating shaft rotates, the opening and closing door is attached to the inner side face of the powder falling portion to slide, powder can be pushed to one side by the opening and closing door with the structure in the opening or closing process, the opening and closing of the opening and closing door are facilitated, the operation reliability of the opening and closing door is improved, and the influence of the powder on the opening, closing and closing of the opening and closing door is reduced.

Drawings

The invention is further described with reference to the following figures and examples.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic sectional view of the present invention;

FIG. 4 is an enlarged view of point A of FIG. 3;

FIG. 5 is a schematic view of a powder supply roller driving device;

FIG. 6 is an enlarged view of the boss;

FIG. 7 is a schematic view of a doctor blade mounting base;

FIG. 8 is a schematic view of a flow passage liner structure;

FIG. 9 is a schematic view of a powder supply roller mounting base;

FIG. 10 is a schematic view of a powder supply roller;

FIG. 11 is a schematic view of a powder supply box;

in the drawings: 1-scraper mounting seat, 2-scraper, 3-powder laying flow channel, 4-powder supplying box, 4 a-powder falling part, 5-powder supplying roller mounting seat, 5 a-powder falling groove, 5 b-bearing groove, 6-powder supplying roller, 6 a-quantitative powder supplying groove, 6 b-polygonal transmission projection, 7-powder supplying cavity, 8-powder supplying plate, 8 a-powder supplying groove, 9-flow channel lining, 10-limiting flange, 11-boss, 12-recovery groove, 13-rotating shaft, 14-opening and closing door, 15-guide rail, 16-working cabin, 17-unthreaded hole, 18-working platform, 19-first motor, 20-ball screw, 21-connecting plate, 22-fleshing through groove, 23-third motor, 24-driving pulley, 25-driven belt wheel, 26-belt, 27-back plate, 28-bearing, 29-guide wall, 30-mounting plate and 31-reinforcing rib.

Detailed Description

FIG. 1 is a schematic perspective view of the present invention; FIG. 2 is a schematic structural view of the present invention; FIG. 3 is a schematic sectional view of the present invention; FIG. 4 is an enlarged view of point A of FIG. 3; FIG. 5 is a schematic view of a powder supply roller driving device; FIG. 6 is an enlarged view of the boss; FIG. 7 is a schematic view of a doctor blade mounting base; FIG. 8 is a schematic view of a flow passage liner structure; FIG. 9 is a schematic view of a powder supply roller mounting base; FIG. 10 is a schematic view of a powder supply roller; FIG. 11 is a schematic view of a powder supply box;

the left and right directions in this embodiment correspond to the directions in fig. 2, that is, the left side facing the product shown in fig. 2 is the left direction in this embodiment, and the right side facing the product shown in fig. 2 is the right direction in this embodiment.

As shown in the figure: the additive manufacturing bidirectional quantitative powder supply device comprises a workbench, a powder spreading mechanism which can be installed on the workbench in a reciprocating left-right linear sliding mode, a first driving device which is installed on the workbench and used for driving the powder spreading mechanism to slide, and two powder supply devices which are installed on the workbench and located on a sliding path of the powder spreading mechanism and used for supplying powder to the powder spreading mechanism, wherein the powder spreading mechanism comprises a scraper installation seat 1 which is driven by the first driving device to slide in a reciprocating mode, a scraper 2 which is installed at the bottom of the scraper installation seat, and two powder spreading flow channels 3 which are arranged on the scraper installation seat and located on the left side and the right side of the scraper, the bottom of the powder supply device is provided with a powder supply groove 8a, and the two powder spreading flow channels are respectively used for receiving powder falling from the two powder supply grooves to realize bidirectional powder spreading of the;

in this embodiment, the workbench is not limited to a traditional open platform, the preferred workbench in this embodiment is a working cabin 16, the working cabin is a hollow cuboid structure, the powder spreading mechanism, the first driving structure, the powder supply device and other components are disposed in an inner cavity of the working cabin, and an operation window is disposed on a side wall of the working cabin, of course, the specific structure of the working cabin is not limited to the cuboid structure, and can be adjusted accordingly according to the printed product and the arrangement of internal components, and the like, and will not be described herein any more, the top of the working cabin is provided with an optical hole 17 for laser to pass through, the bottom of the working cabin is connected to the optical hole with a forming channel extending downward, a forming workbench 18 is disposed in the forming channel, and the forming workbench can be disposed in the forming channel in a liftable manner, and the specific lifting form can be realized by a linear motor, a hydraulic cylinder or other, the two powder supply devices are arranged on the left side and the right side of the forming workbench 18, the first driving device adopts a first motor 19, the first motor is in transmission fit with a ball screw 20, the ball screw is in threaded connection with a sliding block, the sliding block protrudes out of the back of a connecting plate 21, the back of a scraper mounting seat is fixedly connected to the front side of the connecting plate, the precise driving of the powder paving mechanism is realized through the cooperation of the motor and the ball screw, two bearing seats are arranged on the side wall of the working cabin, two ends of the ball screw are mounted on bearings in the bearing seats, the attention screw is in rotation fit with the working cabin through the structure, the stability of the ball screw is improved, a T-shaped mounting groove is arranged at the bottom of the scraper mounting seat, a T-shaped mounting boss is arranged at the top of the scraper, the T-shaped mounting boss is arranged in the T-shaped mounting, chamfers are arranged on two sides of the bottom of the scraper along the sliding direction of the scraper, and in the sliding powder scraping process of the scraper, downward pressure is applied to powder through the chamfers, and the downward pressure can be adjusted through the angle of the chamfers, so that the compactness of the powder is adjusted, and the powder laying effect is improved; the scraper mounting seat is provided with an inclined plane which inclines upwards from outside to inside, the side part of the scraper mounting seat can form a triangular structure or a right trapezoid structure through the inclined plane, the scraper mounting seat 1 is mounted on the connecting plate 21 to form a triangular cantilever structure, and the stability of the scraper mounting seat is improved; the lateral part of the scraper mounting seat is provided with the meat removing through groove 22 which is of a triangular section structure, the weight of the scraper mounting seat is reduced on the premise of ensuring the integral structural strength of the scraper mounting seat through the structure, the material consumption of the scraper mounting seat is reduced, the cost is saved, the two powder paving runners 3 are communicated to the bottom from the inclined plane on the scraper mounting seat, the scraper mounting seat and the powder supply device can form good matching through the inclined plane, namely, the powder supply groove 8a and the powder paving runners are well communicated to form a closed runner, the dust raising can be effectively reduced, the powder paving effect is improved, meanwhile, the scraper mounting seat is divided into three parts by the two powder paving runners, namely two parts which are respectively positioned at the outer sides of the two powder paving runners and one part which is positioned between the two powder paving runners, the three-part structure vertically plays the role of reinforcing ribs, and because the runners are vertically matched with the powder supply plate, the scraper mounting seat can be subjected to vertical acting force, the strength of the scraper mounting seat is improved in the vertical direction through the reinforcing rib structure, the scraper mounting seat is prevented from deforming when being subjected to the vertical acting force, the phenomenon that a runner lining and a powder paving runner deform due to the fact that the scraper mounting seat deforms is avoided, the powder paving stability and the powder paving effect are improved, meanwhile, the scraper mounting seat provides stable support for a scraper, and the powder scraping effect is prevented from being influenced due to the fact that the scraper deforms under stress;

when the powder feeding device is used, the sliding stroke of the scraper mounting seat can be accurately controlled by controlling the starting and stopping of the first motor 19, when the scraper mounting seat spreads powder from left to right, the powder spreading flow channel positioned on the right side of the scraper carries out powder spreading operation, meanwhile, the scraper positioned on the rear side in the sliding direction carries out powder scraping operation, when the scraper mounting seat is spread to the rightmost side, the powder stored in the powder feeding flow channel just falls to the greatest extent, the powder spreading flow channel positioned on the left side of the scraper is butted with the powder feeding groove of the right side powder feeding device, the powder feeding operation is realized on the powder spreading flow channel positioned on the left side of the scraper through the powder feeding device on the right side, part of the powder flows to the bottom of the working cabin to form accumulation and block the bottom of the powder spreading flow channel, so that the powder is stored in the powder spreading flow channel, the position where the powder is accumulated is preferably arranged on the side part, the powder spreading operation is carried out on the powder spreading flow channel on the left side, meanwhile, the scraper located on the rear side in the sliding direction carries out powder scraping operation, when the powder is spread to the leftmost side, powder stored in the powder supply flow channel just falls off, at the moment, the powder spreading flow channel located on the right side of the scraper is in butt joint with the powder supply groove of the powder supply device on the left side, the powder supply operation is carried out on the powder spreading flow channel located on the right side of the scraper through the powder supply device on the left side, then, the powder spreading operation is continuously carried out on the scraper mounting seat from left to right, the next powder spreading flow path is carried out, the powder spreading operation is always guaranteed to be carried out on the powder spreading flow channel located on the front side in the sliding direction of the scraper mounting seat in the powder spreading process, and; the powder spreading flow realizes bidirectional powder spreading operation, avoids idle stroke, improves powder spreading efficiency, integrates a powder spreading flow channel on the scraper mounting seat, does not need to be provided with a switching device to realize bidirectional powder spreading operation, simplifies the structure of bidirectional powder spreading, integrates the powder scraping device and the powder spreading device into a whole, improves the stability of powder spreading and powder scraping, and improves powder spreading effect due to interaction of the powder spreading flow channel and the powder spreading device; spread the powder runner and accept the powder at the removal in-process temporarily, this structure can make things convenient for the selectivity to supplying the powder in spreading the powder runner, can realize spreading the powder operation of supplying of powder runner to the difference through the stroke control of first motor to the scraper mount pad, this structure need not to set up the auto-change over device who spreads the powder runner, and supply the powder in spreading the powder runner before spreading the powder, make the powder extrusion state in spreading the powder runner remain invariable all the time, the powder layer of laying remains thin thick even all the time, the powder quality of spreading has been improved.

In the embodiment, a runner lining 9 is arranged in the powder laying runner and can slide along the through direction of the runner lining, a pressing device matched with the runner lining for use is arranged on the workbench, and after the runner lining is butted with the powder supply groove 8a, the pressing device presses the bottom of the runner lining to enable the runner lining to slide upwards and form a closed runner with the powder supply groove; the powder spreading flow channel is set to be a through groove structure, which is similar to an elongated waist-shaped hole structure, the flow channel lining is a thin-wall annular structure matched with the powder spreading flow channel, when the powder supply device supplies powder, the powder is stored in the flow channel lining, after the flow channel lining is in butt joint with the powder supply groove 8a, the flow channel lining is pressed at the bottom of the flow channel lining through the pressing device to enable the flow channel lining to slide upwards, the bottom of the flow channel lining is abutted against the bottom of the powder supply device to enable the flow channel lining and the powder supply groove to form a closed flow channel, the pressing device can be a hydraulic mechanism arranged at the bottom of the working cabin, in a normal state, the output end of the hydraulic mechanism retracts into the bottom of the working cabin to avoid the interference between the output end of the hydraulic mechanism and parts such as a scraper, when the scraper mounting seat is positioned to enable the flow channel lining to be in butt joint with the powder supply groove 8a, the pressing power can be provided by spring parts, motors and other structural forms, and the details are not repeated; the structure can effectively avoid powder flying dust caused by the middle gap, effectively avoid the flying dust from shielding laser to influence sintering or melting effect, also avoid the flying dust from influencing powder paving effect, simultaneously reduce the dust pollution phenomenon caused by the flying dust to the inner and outer environments of the working chamber, improve sintering quality and powder paving effect, and improve the working environment inside and outside the working chamber.

In this embodiment, the powder supply device includes a powder supply box 4 fixed on the workbench for storing powder, and a quantitative powder supply mechanism connected to the bottom of the powder supply box and communicated with the inner cavity of the powder supply box for quantitatively supplying powder to the powder paving flow channel, wherein the bottom of the quantitative powder supply mechanism is provided with a powder falling groove 5a for falling powder; the powder falling groove 5a can be directly used as a powder supply groove 8a, as shown in fig. 3, the powder supply groove is arranged on the powder supply plate and is positioned below the powder falling groove, the powder supply groove and the powder falling groove are communicated to form a closed flow passage, the powder supply box is detachably connected with the quantitative powder supply mechanism, the powder supply box can be integrated on the quantitative powder supply mechanism and are integrally formed, the detachable connection mode is preferred in the embodiment, the disassembly and the maintenance of the powder supply box and the quantitative powder supply mechanism are convenient, the side wall of at least one side of the powder supply box is inclined downwards to form a guide wall 29 so that the bottom of the powder supply box is reduced downwards, the guide wall is parallel to the length direction of the receiving groove, the guide wall extends downwards to the side part of the receiving groove, the flowing of the powder is guided by the guide wall, the powder is prevented from being retained, the powder is supplied to the powder supply groove by the powder falling groove of the quantitative powder supply mechanism, the quantitative powder supply mechanism can accurately, but the speed of powder outflow of powder runner and the sliding speed and the sliding distance of scraper mount pad are spread in the cooperation and the area of laying of accurate control powder, slide to the end when the scraper mount pad, can guarantee that inside powder falls to the greatest extent, avoid invalid shop's powder operation, have improved the utilization ratio of powder, have reduced the powder that needs the recovery, have improved shop's powder efficiency.

The bottom of the powder supply box is provided with a horizontally extending mounting plate 30, and a triangular area is formed between the mounting plate and the guide wall and outside the powder supply box; form between mounting panel and the guide wall and be provided with many in the triangular area and be provided with the strengthening rib 31 as an organic whole with the two even, supply the powder box as shown in fig. 11 and be provided with a guide wall for supply the powder box side and be the trapezium structure, improve the stability that supplies the powder box installation through setting up the mounting panel, improve the bulk strength who supplies the powder box through addding the strengthening rib simultaneously.

In this embodiment, the top and bottom edges of the flow channel liner have outward extending limiting flanges 10 for limiting the flow channel liner in the powder laying flow channel, the pressing device is two bosses 11 respectively arranged on the workbench below the two powder supply grooves 8a and respectively matched with the two flow channel liners, opposite sides of the two bosses have inclined planes or curved surfaces extending outward from the centers of the two bosses and gradually rising, and the inclined planes or curved surfaces are used for contacting the limiting flanges below the corresponding flow channel liners and enabling the flow channel liners to slide and press on the powder supply device; the upper and lower limiting flanges and the flow channel lining form an I-shaped structure, the width of the limiting flange is larger than the width of the powder laying flow channel or the length of the limiting flange is larger than the length of the powder laying flow channel, so as to limit the flow channel lining in the powder laying flow channel, the height of the flow channel lining is slightly higher than the height of the powder laying flow channel, so that the flow channel lining can slide up and down in the powder laying flow channel, the jointing surface of the powder supply device bottom can be increased and pressed through the upper limiting flange, so that the powder supply device bottom can be tightly jointed, the sealing effect of the powder supply device bottom is improved, the upper limiting flange can be made of elastic material, such as rubber material, in the process of moving the flow channel lining up, the upper limiting flange made of rubber material is extruded and deformed at the powder supply device bottom, so that a closed flow channel is formed between the flow channel lining and the powder supply groove, the lug boss can, this is no longer repeated here, preferred semi-circular boss structure in this embodiment, as shown in fig. 6, when the scraper mount pad moves to the leftmost side, boss 11 is raised the limit flange that is located the runner inside lining bottom on scraper right side gradually through the extrados, the limit flange of top compresses tightly in supplying powder device bottom, make runner inside lining and supply constitute closed runner between the powder groove, when boss and limit flange break away from, the runner inside lining resets through the automatic gliding of dead weight, the slip stroke through simple boss structure cooperation scraper mount pad has realized the runner inside lining and has supplied the closure between the powder groove, this simple structure, and easy to operate can realize the slip of runner inside lining without setting up dedicated power device.

In the embodiment, the limiting flanges at the bottoms of the two flow passage linings extend along the front side and the rear side of the scraper and exceed the front end and the rear end of the scraper and the scraper mounting seat respectively, and the two bosses are arranged on the front side and the rear side of the scraper and the scraper mounting seat respectively and are matched with the limiting flanges at the bottoms of the two flow passage linings for use; as shown in fig. 6, the flow path lining on the right side of the scraper, the limit flange at the bottom of the flow path lining extends forward to the front side of the front end face of the scraper and the scraper mounting seat, the boss on the left side of the forming workbench is arranged on the front side of the front end face of the scraper and the scraper mounting seat, similarly, for the flow path lining on the left side of the scraper, the limit flange at the bottom of the flow path lining extends backward to the rear side of the rear end face of the scraper and the scraper mounting seat, the boss on the right side of the forming workbench is arranged on the rear side of the rear end face of the scraper and the scraper mounting seat, a yielding space is arranged by the structure, the scraper mounting seat and the scraper do not interfere with the boss in the sliding process, the boss does.

In this embodiment, the opposite sides of the two bosses 11 have arc-shaped curved surfaces; the flow path lining is set into a circular arc-shaped curved surface, when a limiting flange at the bottom of the flow path lining abuts against the curved surface to move upwards, the upward moving speed of the flow path lining is changed in a curve manner, the initial speed and the final speed of the upward moving of the lining are controlled by controlling the bending radius of the curved surface, in the embodiment, 1/4 circular arc surfaces are preferably set from the bottoms of the opposite sides of the two bosses to the highest positions of the bottoms of the opposite sides of the two bosses, and the tangent line of the curved surface at the highest; this structure makes the runner inside lining when upwards moving along the boss curved surface, initial velocity is great, when removing to the highest point, the speed tends to zero, make the spacing flange at runner inside lining top laminate gently with supplying powder device bottom, the atress is even, improve the airtight effect of the two, avoid because the rigidity collision that the speed is too fast and cause, in repetitious usage, can guarantee the sealed effect of the two, the use number of times of runner inside lining has been improved, for the manufacturing of making things convenient for the boss, set the boss into semicircular structure in this embodiment, its radial plane end is laminated in the work cabin bottom.

In this embodiment, the quantitative powder supply mechanism includes a powder supply roller mounting seat 5, a powder supply roller 6, and a second driving device for driving the powder supply roller to rotate around its own axis, the powder supply roller mounting seat is connected to the bottom of the powder supply box, a columnar powder supply cavity 7 is formed in the powder supply roller mounting seat, the diameter of the powder supply roller is matched with the diameter of the powder supply cavity and is rotatably installed in the powder supply cavity, a receiving groove 5b for communicating the powder supply box cavity with the powder supply cavity is formed above the powder supply roller mounting seat, a powder dropping groove 5a is formed below the powder supply roller mounting seat, and quantitative powder supply grooves 6a extending along the axial direction are uniformly distributed on the circumferential surface of the powder supply roller; when the powder supply roller mounting seat and the powder supply box are integrally formed, the bearing groove 5b directly penetrates from the upper part of the powder supply cavity to the bottom part of the powder supply box, when the powder supply roller mounting seat and the powder supply box are detachably arranged, the bearing groove adopts a two-section structure, namely, the bearing grooves are arranged above the powder supply cavity and at the bottom part of the powder supply box, the two bearing grooves are butted to form a closed flow channel, the bearing groove and the powder falling groove extend along the axial direction of the powder supply cavity, the powder falling groove and the bearing groove are respectively arranged at the uppermost part and the lowermost part of the powder supply cavity, so that the powder falling groove is positioned right below the bearing groove, the radial section of the quantitative powder supply groove can be in a semicircular, rectangular or other polygonal structure, the powder supply roller and the powder supply cavity are in clearance fit, the clearance value of the powder supply roller is adjustable according to factors such as the size of powder particles, when the powder supply roller rotates, the quantitative powder supply groove 6a above the powder supply roller is butted with the bearing, when the quantitative powder supply groove is in butt joint with the powder falling groove, powder flows into the powder falling groove to realize accurate flow control of the powder, the rotation of the powder supply roller can realize the effect of actively extracting the powder, and the phenomenon of poor flow caused by long-time accumulation of the powder in the powder supply box is avoided, as shown in figures 9 and 10, mounting holes with the diameter larger than the inner diameter of the powder supply cavity are arranged at two ends of the powder supply cavity and are used as bearing seats, two ends of the powder supply roller are rotationally matched in the bearing seats through bearings 28, the powder supply roller can be directly driven through an external third motor, as shown in figure 5, each quantitative powder supply mechanism is respectively provided with a second driving device, each second driving device comprises a third motor 23, a driving belt wheel 24, a driven belt wheel 25 and a belt 26, the driving belt wheel 24 is in transmission fit with the third motor, and the powder supply roller is in transmission fit with the driven belt wheel 25, the driving belt wheel and the driven belt wheel are in transmission fit through a belt 26, each quantitative powder supply mechanism is provided with a set of driving system, so that the quantitative powder supply mechanisms can be independently controlled, the driving of the powder supply rolling shafts is not limited to the structure, the control of the two powder supply rolling shafts can be realized by matching the shifting fork with the speed reducer, and the description is omitted.

In this embodiment, the second driving device includes a driving member mounted on the workbench for providing power, and an intermediate transmission member driven by the driving member and transmitting the power to the powder supply roller, a polygonal transmission protrusion 6b for matching with the intermediate transmission member is disposed at an end of the powder supply roller, a transmission hole adapted to the polygonal transmission protrusion is disposed on the intermediate transmission member, and the polygonal transmission protrusion 6b is located in the transmission hole; the driving member is the third motor, the intermediate transmission member is the driving pulley, the driven pulley and the belt, and the intermediate transmission member may be a single wheel directly connected to the output shaft of the third motor, which is not described in detail; the powder supply roller mounting seat is detachably connected to the inner wall of the working cabin, a transmission hole is formed in the end portion of the driven pulley, the driven pulley transmits the rotation motion to the powder supply roller through the matching of the transmission hole and a polygonal transmission lug, the polygonal transmission lug can be a rectangular lug, a triangular lug, a pentagonal lug, a hexagonal lug and the like, the polygonal transmission lug is not limited to a polygonal structure in the traditional sense, and can also be a spline, a gear-shaped polygon structure and the like, repeated description is omitted here, the driven pulley can be of a single structure, namely a wheel body structure, one end of the wheel body is provided with a mounting hole matched with the driving shaft, the other end of the wheel body is provided with a transmission hole, the driven pulley can also be of a compound structure, namely two wheel body structures are arranged in the axial direction, one wheel body is matched with the driving shaft, the other wheel body is matched with the polygonal, can be directly with ration powder supply mechanism and supply the powder box to demolish, supply powder mechanism and supply the powder box installation to target in place new ration, the polygon transmission lug and the transmission hole cooperation of the confession powder roller tip after the change, in supplying powder roller bearing mount pad to pass through the fix with screw in the work cabin, this structure makes things convenient for the ration to supply powder mechanism and supply the powder box as the dismantlement and the change of an integral part, the continuous operation ability of this device has been improved, when needs are with when trading the powder, directly with trade ration supply powder mechanism and supply the powder box can, can avoid dismantling and wash the work interrupt that causes original equipment.

In this embodiment, the powder supply device further includes a powder supply plate 8, the powder supply plate 8 is vertically extended and connected to the bottom of the powder supply roller mounting seat and covers the bottom end of the powder dropping groove, and the powder supply groove 8a is vertically arranged on the powder supply plate 8 and is communicated with the powder dropping groove 5 a; through supplying the powder board, can increase the distance that supplies between powder roller bearing mount pad and the scraper mount pad, make things convenient for arranging between each spare part, through the setting that supplies the powder board, make supply powder tank bottom as far as possible and spread and be close to each other between the powder runner top, supply powder roller bearing mount pad and scraper mount pad butt joint back, make supply powder tank and spread and form confined runner between the powder runner, the raise dust control that the powder that falls down produced is in confined runner, reduce the pollution of raise dust to the environment and to the influence of spreading the powder quality, the powder quality of spreading has been improved.

In the embodiment, the bottom of the powder supply box 4 is provided with a powder dropping part 4a with a downward concave radial section in a circular arc shape, the receiving groove 5b is arranged at the bottom of the powder dropping part and extends along the axial direction, a rotating shaft 13 is coaxially arranged in the powder supply box 4 and the powder dropping part, the rotating shaft is in transmission fit with an opening and closing door 14 for opening or closing the receiving groove, and the opening and closing door is attached to the inner side surface of the powder dropping part and is matched with the inner side surface of the powder dropping part; as shown in fig. 4, the powder dropping portion is a long strip and extends along the axial direction of the powder supplying roller, the powder dropping portion is located at the lowest position of the powder supplying box, the side wall of the powder supplying box extends downwards to the edge of the powder dropping portion, powder flows into the powder dropping portion through the guiding of the side wall, the powder is always ensured to be filled in the powder dropping portion, when the powder is extracted by matching with the powder supplying roller, the amount of powder extracted by each quantitative powder supplying groove is maintained in a smaller error range, the phenomenon that the deviation of the amount of powder extracted by each quantitative powder supplying groove is too large due to unsmooth flow of the powder is avoided, and the powder supplying precision is improved; the opening and closing door is in a semicircular annular structure, the outer diameter of the opening and closing door is the same as the inner diameter of the powder falling part, the opening and closing door is connected to the rotating shaft in a transmission fit mode through a fan-shaped connecting rod, when the rotating shaft rotates, the opening and closing door is attached to the inner side surface of the powder falling part to slide, the opening and closing door can be made of elastic materials or metal materials, the opening and closing door and the powder falling part can be matched in a clearance fit or transition fit mode according to different materials of the opening and closing door, when the opening and closing door is made of metal materials, the clearance fit mode can be adopted to avoid the overlarge friction force between the two, when the rubber and other materials with larger elasticity are adopted, the powder can be pushed to one side by the opening and closing door with the structure in the opening or closing process by adopting a transition fit mode, the opening and closing of the opening and closing door are facilitated, the powder cannot cause the blocking phenomenon of the opening and closing door, the operation reliability of the opening and closing door is improved, and the influence of the powder on the opening and closing of the opening and closing door is reduced.

In this embodiment, two recycling tanks 12 are arranged on the path of the powder spreading mechanism on the workbench, and the two recycling tanks are respectively arranged on the left side and the right side of the powder spreading area; the accumulator sets up in two both sides that supply powder groove 8a, and is located the outside of two lugs, and the work cabin bottom can set up the recovery box, and the recovery box inner chamber link up through accumulator and work cabin inner chamber, and the scraper pushes away unnecessary powder to accumulator department, and the powder drops to the recovery box in through the accumulator, makes things convenient for the recovery of powder.

In this embodiment, fixedly connected with uses the guide rail 15 that leads it with the cooperation of scraper mount pad on the workstation, as shown in fig. 5, the guide rail, first motor and ball fixed connection are on backplate 27, the backplate is fixed in on the inside wall of work cabin, for the operating stability who improves the scraper mount pad, be provided with two tracks from top to bottom at the backplate front side, ball sets up between two tracks, the connecting plate back is provided with the track groove with track looks adaptation, track and track groove can set up to dovetail cooperation installation and realize that the two single degree of freedom rectilinear slide also can set up to other structural style and realize single degree of freedom rectilinear slide, no longer repeated here.

In this embodiment, the axial direction of the powder supply cavity is perpendicular to the sliding direction of the powder spreading mechanism; the axial direction of the powder supply cavity is perpendicular to the sliding direction of the powder paving mechanism, but certain angle error is allowed to be kept, the specific error range is determined according to the actual paving condition, the powder plane paving shape can be improved through the structure, and the powder paving effect is improved.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (9)

1. The utility model provides a two-way ration powder supply device of vibration material disk which characterized in that: the quantitative powder supplying mechanism is connected to the bottom of the powder supplying box and communicated with the inner cavity of the powder supplying box for quantitatively supplying powder, and a powder falling groove for supplying powder is formed in the bottom of the quantitative powder supplying mechanism;

the ration supplies whitewashed mechanism to supply whitewashed roller bearing mount pad, supplies whitewashed roller bearing and drive to supply whitewashed roller bearing to use its self axis to be center pivoted second drive arrangement, supply whitewashed roller bearing mount pad to connect in supplying the powder box bottom, supply to set up the columnar confession powder chamber on the whitewashed roller bearing mount pad, supply whitewashed roller bearing diameter and supply whitewashed chamber diameter looks adaptation and rotatable the installing in supplying whitewashed intracavity, supply whitewashed roller bearing mount pad top to set up and make and supply the powder box inner chamber and supply the groove of accepting that the powder chamber link up, the groove of falling powder is seted up in supplying whitewashed roller bearing mount pad below, it supplies whitewashed groove to supply the global evenly distributed of whitewashed roller bearing to have along axially extended ration.

2. The additive manufacturing bi-directional quantitative powder supply device according to claim 1, wherein: the powder supply device further comprises a powder supply plate, the powder supply plate is vertically extended to be connected to the bottom of the powder supply roller mounting seat and covers the bottom end of the powder falling groove, and the powder supply plate is provided with a powder supply groove communicated with the powder falling groove.

3. The additive manufacturing bi-directional quantitative powder supply device according to claim 1, wherein: the powder supplying box is characterized in that a powder falling part with a downward sunken radial cross section in a circular arc shape is arranged at the bottom of the powder supplying box, and the receiving groove is formed in the bottom of the powder falling part and extends along the axial direction.

4. The additive manufacturing bi-directional quantitative powder supply device according to claim 3, wherein: the powder feeding box is internally provided with a rotating shaft coaxial with the powder falling part, the rotating shaft is connected with an opening and closing door used for opening or closing the receiving groove in a transmission matched mode, and the opening and closing door is attached to the inner side surface of the powder falling part and is matched with the inner side surface of the powder falling part.

5. The additive manufacturing bi-directional quantitative powder supply device according to claim 1, wherein: the side wall of at least one side of the powder supply box is inclined downwards to form a guide wall, so that the bottom of the powder supply box is reduced downwards.

6. The additive manufacturing bi-directional quantitative powder supply device according to claim 1, wherein: the powder supply cavity is provided with mounting holes at two ends, the diameter of each mounting hole is larger than the inner diameter of the powder supply cavity and the mounting holes are used as bearing seats, and two ends of the powder supply roller are rotationally matched in the mounting holes through bearings.

7. The additive manufacturing bi-directional quantitative powder supply device according to claim 5, wherein: supply the powder box bottom to be connected with the horizontally extending mounting panel, supply between mounting panel and the guide wall to form triangle region in the powder box outside.

8. The additive manufacturing bi-directional quantitative powder supply device according to claim 7, wherein: and a plurality of reinforcing ribs which connect the mounting plate and the guide wall into a whole are arranged in a triangular area formed between the mounting plate and the guide wall.

9. The additive manufacturing bi-directional quantitative powder supply device according to claim 1, wherein: the second driving device comprises a driving piece arranged on the workbench and used for providing power, and an intermediate transmission piece which is driven by the driving piece and transmits the power to the powder supply roller, wherein the end part of the powder supply roller is provided with a polygonal transmission lug matched with the intermediate transmission piece, the intermediate transmission piece is provided with a transmission hole matched with the polygonal transmission lug, and the polygonal transmission lug is positioned in the transmission hole.

Images