CN109760313B - Powder falling and spreading device for additive manufacturing equipment - Google Patents
Powder falling and spreading device for additive manufacturing equipment Download PDFInfo
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- CN109760313B CN109760313B CN201910224340.5A CN201910224340A CN109760313B CN 109760313 B CN109760313 B CN 109760313B CN 201910224340 A CN201910224340 A CN 201910224340A CN 109760313 B CN109760313 B CN 109760313B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention discloses a powder falling and spreading device for additive manufacturing equipment, which comprises a powder spreading operation table, a powder spreading component and a driving component, wherein the powder spreading component is slidably arranged on the powder spreading operation table in a front-back single degree of freedom, the driving component drives the powder spreading component to slide, the powder spreading component comprises a flow guiding block which is slidably connected on the powder spreading operation table in a front-back manner and is used for falling powder, a powder falling port switching plate which is arranged above the flow guiding block and is slidably arranged in a front-back manner, and a collision block which is arranged on the powder spreading operation table and is positioned on the front side and the rear side of the powder spreading component and is used for colliding with the powder falling port switching plate, the powder falling port switching plate is provided with a powder falling switching groove which extends leftwards and rightwards, and the flow guiding block is provided with two powder falling grooves which are arrayed in a front-back manner and extend leftwards and rightwards; according to the powder paving component, the powder falling groove is automatically switched through the impact in the sliding process, a special driving device is not required to be arranged for switching the powder falling groove, the structure of the powder paving component is simplified, the control system is simplified, and the cost of additive manufacturing equipment is reduced.
Description
Technical Field
The invention belongs to the technical field of additive manufacturing, and particularly relates to a powder falling and spreading device for additive manufacturing equipment.
Background
When the additive manufacturing equipment is used for bidirectionally paving powder, a powder falling port needs to be switched, the powder falling port is switched by the existing additive manufacturing equipment, a servo motor or a stepping motor is mainly used for driving a scraper to move, powder falling is realized by a motor-driven roller, the structure is complex, the uniformity of the powder falling is poor, and the manufacturing cost is high;
aiming at the problems, the powder falling and spreading device for the additive manufacturing equipment is provided, and the device realizes the switching of powder falling ports by the automatic impact principle of a scraper, and has the advantages of simple structure, uniform powder spreading and low cost;
disclosure of Invention
In view of the above, the invention provides a powder falling and spreading device for additive manufacturing equipment, which realizes powder falling and spreading by the automatic impact principle of a scraper, and has the advantages of simple structure, uniform powder spreading and low cost;
the invention relates to a powder falling and spreading device for additive manufacturing equipment, which comprises a powder spreading operation table, a powder spreading assembly capable of being slidably mounted on the powder spreading operation table in a front-back single degree of freedom and a driving assembly for driving the powder spreading assembly to slide, wherein the powder spreading assembly comprises a flow guide block which is slidably connected on the powder spreading operation table in a front-back manner and is used for falling powder, a powder falling port switching plate which is arranged above the flow guide block and can be slidably moved in a front-back manner, and a collision block which is mounted on the powder spreading operation table and is positioned on the front side and the rear side of the powder spreading assembly and is used for being impacted with the powder falling port switching plate, the powder falling port switching plate is provided with two powder falling grooves which are arranged in a front-back manner and extend in a left-right manner, and the powder falling port switching plate and the collision block are alternately connected with the two powder falling grooves in a sliding manner after being impacted by the powder falling port switching plate.
Further, be provided with the guide component that is used for carrying out the direction to falling powder mouth switching plate slip on the guide block, the guide component includes two at least connected on the guide block and the guiding axle that extends around, falling powder mouth switching plate is last to have the guide way with guiding axle looks adaptation.
Further, the powder falling port switching plate is overhead on the guide shaft.
Further, the guide groove is provided with at least a horizontal guide surface extending horizontally and an inclined guide surface connected to the inner side of the horizontal guide surface and extending obliquely downwards, and the horizontal guide surface and the inclined guide surface are respectively contacted with the upper part and the side line of the guide shaft.
Further, the guide block is also connected with a plurality of supporting shafts extending back and forth, and the supporting shafts are contacted with the bottom of the powder falling port switching plate to support the powder falling port switching plate.
Further, still include the powder feed bin, powder feed bin fixed connection is in water conservancy diversion piece top and will fall the powder mouth switching plate centre gripping between powder feed bin and water conservancy diversion piece, powder feed bin bottom opening falls the powder mouth switching plate and covers in powder feed bin bottom open end.
Further, the bottom of the flow guide block is connected with a scraper, and the scraper is positioned between the two powder falling grooves.
Further, the flow guide block bottom is fixedly connected with a scraper mounting seat, a scraper mounting groove which extends leftwards and rightwards and is large in longitudinal section and small in the outer side is formed in the bottom of the scraper mounting seat, and the scraper is embedded in the scraper mounting groove.
Further, the guide block is fixedly connected with a bending plate, and the bending plate is provided with at least one installation plane for installing the detection device.
Further, a plurality of reinforcing ribs I extending forwards and backwards are arranged in the powder falling switching groove, and a plurality of reinforcing ribs II extending forwards and backwards are arranged in the powder falling groove.
The invention has the beneficial effects that:
according to the powder paving assembly, the powder falling groove is automatically switched through the impact in the sliding process, so that the powder paving assembly can bidirectionally supply powder in the front-back sliding process, the idle stroke is avoided, the powder paving efficiency is improved, a special driving device is not required to be arranged for switching the powder falling groove, the structure of the powder paving assembly is simplified, a control system is simplified, the cost of additive manufacturing equipment is reduced, the powder paving assembly generates slight vibration in the impact process of the powder falling opening switching plate and the impact block, the powder stored in the powder supplying device and the powder falling switching groove is uniformly dispersed through the vibration, the holes generated by the flowing of the powder in the powder can be effectively removed, the powder can uniformly flow out of the powder falling groove, the powder paving uniformity is improved, and the powder paving quality is improved;
according to the invention, the guide groove is matched with the guide shaft to guide the sliding of the powder falling port switching plate, the powder falling port switching plate can move along a preset track during sliding, so that the sliding precision of the powder falling port switching plate can be improved, the matching precision of the powder falling port switching groove and the powder falling groove is improved, the powder falling port switching plate is arranged in an overhead manner relative to the guide block through the guide shaft, a certain gap is reserved between the powder falling port switching plate and the guide block, and a certain space allowance is reserved for powder; the powder falling port switching plate is arranged in an overhead manner relative to the flow guide block, so that contact between the powder falling port switching plate and the flow guide block can be avoided, friction force between the powder falling port switching plate and the flow guide block is reduced, friction loss between the powder falling port switching plate and the flow guide block is reduced, sliding resistance of the powder falling port switching plate is reduced, and sliding fluency of the powder falling port switching plate is improved;
according to the invention, the guide groove is contacted with the guide axis, so that the friction force in the sliding process of the powder falling port switching plate is reduced, and the sliding fluency of the powder falling port switching plate is improved; the two inclined guide surfaces position the powder falling port switching plate in the left-right direction, so that left-right movement of the powder falling port switching plate is limited, and the sliding precision of the powder falling port switching plate is improved;
drawings
The invention is further described below with reference to the drawings and examples.
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic perspective view of a powder paving assembly;
FIG. 3 is a schematic diagram of the cooperation structure of the flow guiding block and the powder falling port switching plate;
FIG. 4 is a schematic diagram of a flow guiding block structure;
FIG. 5 is an enlarged schematic view of the structure of the point A in FIG. 3;
FIG. 6 is an enlarged schematic view of the structure at point B in FIG. 3;
FIG. 7 is a schematic side view of the present invention;
FIG. 8 is a schematic cross-sectional view of FIG. 7, shown in FIG. 1;
FIG. 9 is a schematic cross-sectional view of FIG. 7;
in the accompanying drawings: 1-powder paving operation table, 2-flow guiding block, 2 a-powder falling groove, 3-powder falling opening switching plate, 3 a-powder falling switching groove, 3 b-impact handle, 4-impact block, 5-guiding shaft, 6-guiding groove, 6 a-horizontal guiding surface, 6 b-inclined guiding surface, 7-supporting shaft, 8-powder supplying bin, 9-scraper, 10-scraper mounting seat, 10 a-scraper mounting groove, 11-connecting bent plate, 12-reinforcing rib I, 13-reinforcing rib II, 14-guide rail, 15-slide block, 16-connecting bracket I, 17-connecting bracket II, 18-cushion block, 19-limit gasket and 20-cylinder;
Detailed Description
FIG. 1 is a schematic perspective view of the present invention; FIG. 2 is a schematic perspective view of a powder paving assembly; FIG. 3 is a schematic diagram of the cooperation structure of the flow guiding block and the powder falling port switching plate; FIG. 4 is a schematic diagram of a flow guiding block structure; FIG. 5 is an enlarged schematic view of the structure of the point A in FIG. 3; FIG. 6 is an enlarged schematic view of the structure at point B in FIG. 3; FIG. 7 is a schematic side view of the present invention; FIG. 8 is a schematic cross-sectional view of FIG. 7, shown in FIG. 1; FIG. 9 is a schematic cross-sectional view of FIG. 7;
in this embodiment, the front, rear, left, right directions coincide with the directions of fig. 7;
the embodiment provides a powder device is spread to powder that falls for material increase manufacture equipment, including shop powder operation panel 1, single degree of freedom slidable mounting around in shop powder operation panel spread powder subassembly and drive shop powder subassembly gliding drive assembly, shop powder subassembly is including can be around sliding connection in shop powder operation panel be used for the water conservancy diversion piece 2 of powder, set up in water conservancy diversion piece top and can the fore-and-aft sliding fall powder mouth switching plate 3 and install on shop powder operation panel and lie in the front and back both sides of shop powder subassembly be used for with fall powder mouth switching plate striking bump the piece 4, fall powder mouth switching plate is last to have seted up about the powder switching groove 3a that extends, set up on the water conservancy diversion piece around arranging and about two powder grooves 2a that extend that fall, fall powder mouth switching plate 3 and bump the back relative water conservancy diversion piece slip and link up mutually with two powder grooves mutually and realize the switching of falling powder groove.
The powder paving operation table is not limited to a traditional planar table-shaped structure, the powder paving operation table can be a shell of additive manufacturing equipment, the bottom of an inner cavity of the shell is used as a powder paving plane, in the embodiment, the powder paving operation table is of a U-shaped structure, a horizontal bottom plate of the powder paving operation table is used for paving powder, vertical side plates are used for installing a driving assembly, as shown in fig. 1, guide rails 14 which extend forwards and backwards are fixedly connected to the inner sides of two side plates of the powder paving operation table, a sliding block 15 is installed on the guide rails in a sliding mode and capable of sliding forwards and backwards in a single degree of freedom mode, the guide rails are of an I-shaped structure, the side surfaces of the sliding block are provided with stepped mounting grooves with small outer parts and large inner parts, the sliding block is buckled on the guide rails through the matching of the mounting grooves and the guide rails, the side surfaces of the sliding block are connected with a connecting bracket I16, the connecting bracket I is fixedly connected with a connecting bracket II 17, the connecting bracket I is fixedly connected with the connecting bracket II, the connecting bracket I is in an angle steel-shaped structure, the vertical connecting wall of the connecting bracket I is fixedly connected to the sliding block, the vertical connecting wall of the connecting bracket II is fixedly connected to the end part of a powder supplying bin 8 or the end part of a guide block 2, the horizontal connecting wall of the connecting bracket II is lapped on the horizontal connecting wall of the connecting bracket I from above to the connecting bracket I and the connecting bracket through a horizontal connecting bracket through a sliding bolt 15, the sliding block is fixedly connected with the connecting bracket and a sliding block 18 in the connecting bracket and a sliding block is fixedly connected with a sliding block 20 in the sliding block assembly in the sliding direction of a sliding assembly, and a distance between the connecting assembly can be adjusted to the front side of a linear driving assembly can be adjusted to be connected to the power assembly in the front side of a power assembly and a front side of a power device is arranged in a front side 20 is adapted to a front; when the powder laying assembly slides to the forefront side or the rearmost side, the powder falling port switching plate 3 collides with the collision block, the powder falling port switching plate 3 slides relative to the guide block 2 in the direction opposite to the sliding direction of the powder laying assembly, the powder falling switching plate 3a moves relative to the guide block and is communicated with the other powder falling groove, so that the powder falling grooves are switched, the powder falling grooves are required to be ensured, in the process of sliding and laying powder by the powder laying assembly, the powder falling grooves on the front side of the scraper are always ensured to be in a working through state, the scraper on the rear side of the powder falling grooves is used for supplying powder for the powder falling switching groove 3a, when the space of the powder falling switching groove 3a is larger, a certain amount of powder can be stored as the corresponding powder falling groove for supplying powder, the powder can be supplied for the powder falling assembly to slide in the front and back of the powder falling groove through the switching groove, the powder falling groove is required to be ensured, the quality of the powder laying assembly is improved to be uniformly controlled, the powder falling groove can be prevented from flowing out of the powder laying groove 3a in the vibration device through the vibration device, and the vibration device is not required to be provided, and the vibration device is required to be controlled, and the powder can be uniformly distributed in the powder laying groove is prevented from flowing in the powder laying assembly, and the powder laying system is required to be uniformly arranged in the powder laying groove by the powder laying assembly;
in order to improve the moving precision of the powder falling port switching plate 3, two collision blocks are respectively arranged at the front side and the rear side of the powder paving operation table, the collision blocks are not limited to a block structure, and can be of a sheet-shaped structure or a columnar structure, so that the powder falling port switching plate 3 collides with the two collision blocks and then is subjected to sliding displacement, the two collision blocks respectively collide with the left end and the right end of the powder falling port switching plate 3, and the two collision blocks collide with the two ends of the powder falling port switching plate 3 at the same time during collision, so that the whole powder falling port switching plate 3 slides in the front-rear direction, the sliding precision is improved, and the side tilting phenomenon of the powder falling port switching plate 3 is avoided; in order to limit the sliding travel of the powder falling port switching plate 3, so that the powder falling port switching plate 3 slides to a preset position after collision, in the embodiment, two groups of limiting blocks are arranged on the left side and the right side of the upper end face of the flow guiding block 2, each group of limiting blocks comprises two limiting gaskets 19 fixedly connected to the upper end face of the flow guiding block 2, the two limiting gaskets are arranged front and back, the powder falling port switching plate 3 is arranged between the two limiting gaskets so that the powder falling port switching plate 3 can only slide within the distance between the two limiting gaskets 19, the sliding travel of the powder falling port switching plate 3 is limited, the stopping position of the powder falling port switching plate 3 in the front-back direction is limited, the powder falling port switching plate 3 stops at the preset position, the matching precision of the powder falling port switching groove 3a and the powder falling groove is improved, in order to ensure that the powder falling port switching plate 3 does not move left and right, the impact handles 3b extending outwards are arranged at the left end and the right end of the powder falling port switching plate 3, the width of the striking handle in the front-back direction is smaller than the width of the plate body of the powder falling port switching plate 3, the striking handle is positioned between the two limiting gaskets 19 and extends outwards to the outside of the flow guiding block for striking with the striking block, the left end and the right end of the powder falling port switching plate 3 are always attached to the inner side walls of the corresponding limiting gaskets, the left and the right direction of the powder falling port switching plate 3 are positioned through the limiting gaskets positioned at the left side and the right side of the flow guiding block, the powder falling port switching plate 3 is prevented from moving in the left and the right directions, the striking handle 3b extends to the outside of the flow guiding block, the cooperation with the striking block is facilitated, the striking handle is not limited to be connected to the left end and the right end of the powder falling port switching plate 3 and extends to the outside of the flow guiding block for striking with the striking block, the striking handle is not arranged, the striking block is set into a special-shaped structure, the striking plate extending horizontally is connected to one side of the striking block opposite to the flow guiding block, the collision plate collides the front side wall and the rear side wall of the powder falling port switching plate from the upper surface of the flow guiding block, the collision form of the collision block and the powder falling port switching plate can be in various forms, and detailed description is omitted; in this embodiment, in order to ensure that the powder falling port switching plate does not rebound after the powder falling port switching plate slides in an impact manner, a pair of special-shaped magnetic attraction can be connected between the inner side wall of the limiting gasket 19 and the front side wall and the rear side wall of the impact handle, when the powder falling port switching plate slides in an impact manner, the side wall of the impact handle abuts against the side wall of the limiting gasket 19, and the limiting gasket 19 is connected with the powder falling port switching plate through the special-shaped magnetic attraction, so that the powder falling port switching plate is prevented from rebounding, and the positioning precision of the powder falling port switching plate is improved;
in this embodiment, a guiding assembly for guiding the sliding of the powder falling port switching plate is disposed on the guiding block 2, the guiding assembly includes at least two guiding shafts 5 connected to the guiding block 2 and extending back and forth, and the powder falling port switching plate is provided with guiding grooves 6 adapted to the guiding shafts; the guide grooves are matched with the guide shafts to guide the sliding of the powder falling port switching plate, the powder falling port switching plate can move along a preset track during sliding, so that the sliding precision of the powder falling port switching plate is improved, the matching precision of the powder falling switching groove 3a and the powder falling groove 2a is further improved, and the powder falling port switching plate can be positioned in the left-right direction by matching the guide shafts with the guide grooves, so that the powder falling port switching plate is prevented from moving or shifting in the left-right direction; in this embodiment, the guide shaft has a cylindrical structure, the cross section of the guide groove may have various structural forms, the cross section of the guide groove may have a semicircular structure adapted to the guide shaft, or may have a triangular or trapezoidal structure, when the guide groove has a semicircular structure, the guide groove is in surface contact with the guide shaft, and when the guide groove has a triangular or trapezoidal structure, the guide groove is in line contact with the guide shaft; the guide shaft is not limited to a cylindrical structure, and can also be a cylindrical structure with a positive section or other polygons, and the guide groove is also arranged to be a polygon structure matched with the guide groove at the moment, and detailed description is omitted;
in this embodiment, the powder falling port switching plate is overhead on the guide shaft 5; when the powder falling port switching plate is in direct contact with the guide block, due to the reasons of manufacturing precision and manufacturing cost, the powder falling port switching plate and the guide block are difficult to form close fit, a gap is formed between the powder falling port switching plate and the guide block all the time, when powder falls into the powder falling groove 2a from the powder falling port switching groove 3a, part of powder can enter the gap between the powder falling port switching plate and the guide block, and in the process of sliding the powder falling port switching plate relatively, the powder falling port switching plate and the guide block can squeeze the powder between the powder falling port switching plate and the guide block and rub the powder falling port switching plate and the guide block, so that serious abrasion of the powder falling port switching plate and the guide block can be caused; therefore, in the embodiment, the powder falling port switching plate is arranged in an overhead manner relative to the guide block, so that a certain gap is reserved between the powder falling port switching plate and the guide block, a certain space allowance is reserved for powder, when the powder enters the gap between the powder falling port switching plate and the guide block, the powder positioned between the powder falling port switching plate and the guide block is not extruded in the process of sliding the powder falling port switching plate relative to the guide block due to the enough space allowance, the friction between the powder and the powder falling port switching plate and the friction between the powder falling port switching plate and the guide block are greatly reduced, the service lives of the powder falling port switching plate and the guide block are prolonged, and the assembly precision of the powder falling port switching plate and the guide block are improved; the powder falling port switching plate is arranged in an overhead manner relative to the flow guide block, so that contact between the powder falling port switching plate and the flow guide block can be avoided, friction force between the powder falling port switching plate and the flow guide block is reduced, friction loss between the powder falling port switching plate and the flow guide block is reduced, sliding resistance of the powder falling port switching plate is reduced, sliding smoothness of the powder falling port switching plate is improved, the structure is particularly suitable for large-scale additive manufacturing equipment with larger weight of the powder falling port switching plate, and the sliding smoothness of the powder falling port switching plate is ensured through the structure;
in this embodiment, the guide groove has at least a horizontal guide surface 6a extending horizontally and an inclined guide surface 6b connected to the inner side of the horizontal guide surface and extending obliquely downward, and the horizontal guide surface and the inclined guide surface are respectively in contact with the upper part and the lateral line of the guide shaft; as shown in fig. 5, the guide groove is provided with two guide surfaces and is formed at the corners of the bottoms of the left end surface and the right end surface of the powder falling port switching plate, so that the guide groove is penetrated through the bottoms of the powder falling port switching plate and the left end surface or the right end surface at the same time, and the guide groove is provided with only two guide surfaces, namely a horizontal guide surface and an inclined guide surface which extend inwards horizontally along the left end surface or the right end surface of the powder falling port switching plate; the two inclined guide surfaces position the powder falling port switching plate in the left-right direction, so that left-right movement of the powder falling port switching plate is limited, and the sliding precision of the powder falling port switching plate is improved; the guide surface and the guide post form two-position line contact, so that the friction force in the sliding process of the powder falling port switching plate is reduced, and the sliding fluency of the powder falling port switching plate is improved; of course, the guide groove can be provided with three guide surfaces, which can be provided with trapezoid groove sections, three linear contacts are formed between the horizontal surfaces of the two side walls and the bottom of the groove body and the guide shaft, and the number and the positions of the guide grooves can be correspondingly adjusted according to the structural form of the guide groove, and the guide groove is not described in detail;
in the embodiment, the flow guiding block 2 is also connected with a plurality of supporting shafts 7 extending forwards and backwards, and the supporting shafts are contacted with the bottom of the powder falling port switching plate to support the powder falling port switching plate; as shown in fig. 4 and 6, the supporting shafts are disposed at the positions of the guide blocks at the reinforcing ribs ii 13, the guide blocks are provided with semicircular embedded grooves for embedding the supporting shafts on the guide blocks, the supporting shaft part regions are exposed above the supporting blocks, the supporting shafts are supported at the bottoms of the guide blocks to form line contact with the guide blocks, three supporting shafts are uniformly disposed between the two guide shafts, the powder falling port switching plates are prevented from bending and deforming through the supporting of the supporting shafts, the use reliability of the powder falling port switching plates is improved, the assembly precision between each part is improved, and the number of the supporting shafts can be correspondingly adjusted according to the installation positions and the number of the guiding shafts and the assembly relation between the supporting shafts and other parts, which is not described in detail.
In this embodiment, the powder feeding device further comprises a powder feeding bin 8, wherein the powder feeding bin is fixedly connected above the flow guiding block 2 and clamps the powder falling port switching plate 3 between the powder feeding bin and the flow guiding block 2, the bottom opening of the powder feeding bin 8 is provided, and the powder falling port switching plate covers the bottom opening end of the powder feeding bin; the width of powder falling port switching board is greater than the open-ended width in powder supply storehouse bottom, guarantee that the powder falling port switching board is in powder supply storehouse bottom opening part all the time in the gliding in-process of front and back, powder in the powder supply storehouse can only fall outside through powder falling switching groove 3a promptly, through the setting in powder supply storehouse, can provide powder for the water conservancy diversion piece in real time, powder spreading efficiency has been improved, the powder falling port switching board centre gripping is in powder supply storehouse and between the water conservancy diversion piece 2, the installation of the powder falling port switching board of being convenient for, and make each spare part compact structure, the wholeness between each spare part has been improved, the stability and the reliability of this device have been improved.
In this embodiment, a scraper 9 is connected to the bottom of the guide block 2, and the scraper is located between the two powder dropping grooves 2 a; in the operation process, the powder falling groove of the scraper on the front side of the powder spreading component in the sliding direction is always kept in a through working state, namely the powder falling groove on the front side of the scraper is used for carrying out powder falling and spreading operation, the scraper on the rear side is used for carrying out powder scraping operation, and the scraper and the flow guiding block are integrated into a whole, so that the powder spreading and spreading operation is synchronously carried out, and the powder spreading quality and the powder spreading efficiency are improved.
In this embodiment, the bottom of the flow guiding block 2 is fixedly connected with a scraper mounting seat 10, the bottom of the scraper mounting seat is provided with a scraper mounting groove 10a extending from left to right and having a longitudinal section with a large inner side and a small outer side, and the scraper is embedded in the scraper mounting groove; the scraper mounting groove can be of an inverted trapezoid structure and can be of a ladder-shaped structure; when the scraper mounting groove is of a stepped structure, the scraper is also of a stepped structure, the scraper is inserted into the scraper mounting groove to form connection with the scraper mounting seat, as shown in fig. 9, fig. 9 is a schematic diagram of a cross-sectional structure of the reinforcing rib II 13 in fig. 7, the scraper is connected to the bottom of the flow guiding block through a screw, the bottom of the flow guiding block is provided with a mounting cavity for mounting the scraper mounting seat, as shown in fig. 8, the powder falling switching groove 3a is communicated with one of the powder falling grooves 2a, and the scraper mounting seat and the scraper are positioned between the two powder falling grooves; the scraper mounting groove is preferably of an inverted trapezoid structure, the scraper is preferably of a cylindrical structure, a part of the peripheral surface area of the cylindrical scraper is exposed out of the scraper mounting groove and serves as a powder scraping surface, any axial outer surface of the peripheral surface of the scraper can serve as the powder scraping surface of the scraper, when one side of the scraper is worn, the powder scraping surface of the scraper can be changed by rotating the scraper, the scraper can be repeatedly utilized, the precision of the powder scraping surface of the scraper can be ensured, the powder paving quality is improved, the service life and the powder scraping precision of the scraper are prolonged, the frequency of replacing the scraper is reduced, and the use cost of the scraper is reduced.
In this embodiment, the guide block 2 is fixedly connected with a bending plate 11, and the bending plate has at least one installation plane for installing the detection device; the connecting bent plate 11 is of an angle steel structure, one side of the connecting bent plate is fixed on the flow guide block, the other side of the connecting bent plate horizontally extends to form an installation plane, and installation and detection of detection devices such as a dial indicator and the like are facilitated through the plane, so that accuracy detection of a powder paving assembly is facilitated.
In this embodiment, a plurality of reinforcing ribs i 12 extending in the front-rear direction are disposed in the powder dropping switching groove 3a, and a plurality of reinforcing ribs ii 13 extending in the front-rear direction are disposed in the powder dropping groove 2 a; through strengthening rib I12, strengthening rib II 13 have improved the bulk strength and torsional rigidity and the bending rigidity of falling powder mouth switching board 3 and guide block 2, prevent that falling powder switching groove 3a and falling powder groove 2a from taking place the deformation in frequent striking, improved falling powder precision and reliability, this structure can be applicable to the longer shop powder subassembly of left and right directions among the large-scale material adding equipment.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and 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 modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (6)
1. A fall powder shop's powder device for additive manufacturing equipment, its characterized in that: the powder spreading device comprises a powder spreading operation table, a powder spreading assembly capable of being arranged on the powder spreading operation table in a front-back single-degree-of-freedom sliding manner and a driving assembly for driving the powder spreading assembly to slide, wherein the powder spreading assembly comprises a flow guide block which is connected on the powder spreading operation table in a front-back sliding manner and is used for falling powder, a powder falling port switching plate which is arranged above the flow guide block and can slide front and back, and a collision block which is arranged on the powder spreading operation table and is positioned on the front side and the rear side of the powder spreading assembly and is used for colliding with the powder falling port switching plate, the powder falling port switching plate is provided with two powder falling grooves which extend left and right, and the two powder falling grooves which are arranged front and back and extend left and right are arranged on the flow guide block; the powder falling port switching plate is provided with a guide groove matched with the guide shaft; the powder falling port switching plate is overhead on the guide shaft;
the guide groove is at least provided with a horizontal guide surface which extends horizontally and an inclined guide surface which is connected to the inner side of the horizontal guide surface and extends obliquely downwards, and the horizontal guide surface and the inclined guide surface are respectively contacted with the upper part and the side line of the guide shaft;
the guide block is also connected with a plurality of supporting shafts extending back and forth, and the supporting shafts are contacted with the bottom of the powder falling port switching plate to support the powder falling port switching plate.
2. The powder falling and spreading device for an additive manufacturing apparatus according to claim 1, wherein: the powder feeding device comprises a powder feeding block, and is characterized by further comprising a powder feeding bin which is fixedly connected above the guide block and clamps a powder falling port switching plate between the powder feeding bin and the guide block, wherein the bottom of the powder feeding bin is provided with an opening, and the powder falling port switching plate covers the opening end of the bottom of the powder feeding bin.
3. The powder falling and spreading device for an additive manufacturing apparatus according to claim 1, wherein: the bottom of the flow guide block is connected with a scraper, and the scraper is positioned between the two powder falling grooves.
4. A powder falling and spreading device for an additive manufacturing apparatus according to claim 3, wherein: the scraper mounting groove which extends leftwards and rightwards and is large in longitudinal section and small in the outer side is formed in the bottom of the scraper mounting seat, and the scraper is embedded in the scraper mounting groove.
5. The powder falling and spreading device for an additive manufacturing apparatus according to claim 1, wherein: the guide block is fixedly connected with a bending plate, and the bending plate is provided with at least one installation plane for installing the detection device.
6. The powder falling and spreading device for an additive manufacturing apparatus according to claim 1, wherein: the powder falling switching groove is internally provided with a plurality of reinforcing ribs I extending forwards and backwards, and the powder falling groove is internally provided with a plurality of reinforcing ribs II extending forwards and backwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910224340.5A CN109760313B (en) | 2019-03-22 | 2019-03-22 | Powder falling and spreading device for additive manufacturing equipment |
Applications Claiming Priority (1)
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| CN110355369B (en) * | 2019-08-22 | 2021-04-06 | 北京星航机电装备有限公司 | Bidirectional powder spreading device for soft scraper |
| CN111975925A (en) * | 2020-08-14 | 2020-11-24 | 北京机科国创轻量化科学研究院有限公司 | 3D printing equipment and method for wide gypsum-based embossment decorative material |
| CN112264617B (en) * | 2020-08-30 | 2023-03-24 | 湖南华曙高科技股份有限公司 | Powder feeding and spreading device for additive manufacturing equipment and collision powder discharging method thereof |
| CN112172146A (en) * | 2020-08-30 | 2021-01-05 | 湖南华曙高科技有限责任公司 | Collision type powder conveying and spreading device and powder conveying and spreading control method thereof |
| CN116766588A (en) * | 2023-07-27 | 2023-09-19 | 湖南珞佳智能科技有限公司 | Bidirectional powder spreading device for additive manufacturing and application method thereof |
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| CN106312068A (en) * | 2016-10-26 | 2017-01-11 | 华南理工大学 | Mechanical contact-type bidirectional switching powder laying system based on powder bed |
| CN108544753A (en) * | 2018-05-07 | 2018-09-18 | 湖南华曙高科技有限责任公司 | Two-way powder laying device, powder supply power spreading device and increasing material manufacturing equipment |
| CN209666283U (en) * | 2019-03-22 | 2019-11-22 | 苏州西帝摩三维打印科技有限公司 | Powder falling powdering assembly for increasing material manufacturing equipment |
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| CN108544753A (en) * | 2018-05-07 | 2018-09-18 | 湖南华曙高科技有限责任公司 | Two-way powder laying device, powder supply power spreading device and increasing material manufacturing equipment |
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