CN115464160A - Scraper structure of 3D printer for SLM - Google Patents

Scraper structure of 3D printer for SLM Download PDF

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Publication number
CN115464160A
CN115464160A CN202211159294.3A CN202211159294A CN115464160A CN 115464160 A CN115464160 A CN 115464160A CN 202211159294 A CN202211159294 A CN 202211159294A CN 115464160 A CN115464160 A CN 115464160A
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CN
China
Prior art keywords
scraper
seat
mounting seat
limiting
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211159294.3A
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Chinese (zh)
Inventor
赵庆洋
范有
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Himalaya Information Technology Co ltd
Original Assignee
Hangzhou Himalaya Information Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hangzhou Himalaya Information Technology Co ltd filed Critical Hangzhou Himalaya Information Technology Co ltd
Priority to CN202211159294.3A priority Critical patent/CN115464160A/en
Publication of CN115464160A publication Critical patent/CN115464160A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/60—Planarisation devices; Compression devices
    • B22F12/67—Blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
    • B08B1/16—Rigid blades, e.g. scrapers; Flexible blades, e.g. wipers
    • B08B1/165—Scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/20—Cleaning of moving articles, e.g. of moving webs or of objects on a conveyor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Screen Printers (AREA)

Abstract

The invention relates to the technical field of 3D printing, in particular to a scraper structure of a 3D printer for SLM, which comprises a scraper, a scraper mounting seat, a driving assembly and a fixed seat, wherein the fixed seat is respectively arranged at two ends of a printing platform; the two scraping plates are respectively installed in limiting grooves formed in the bottom of the scraping plate installation seat in a sliding mode, the two scraping plates are kept high and low in the scraping plate installation seat, and the bottom of the scraping plate at the low position scrapes powder on the printing platform; this technical scheme changes the high low position on removing the fixing base department to print platform one end through the scraper blade in the scraper blade mount pad, and the both sides and the bottom scraper blade of cooperation spacing groove clean the scraper blade, thereby the scraper blade that does not occupy the powder after the cleaning carries out strickleing off the effect of strickleing off the powder next time to the powder.

Description

Scraper structure of 3D printer for SLM
Technical Field
The invention relates to the technical field of 3D printing, in particular to a scraper structure of a 3D printer for an SLM.
Background
At present, the SLM metal printer consists of a powder cylinder and a forming cylinder, a piston (powder feeding piston) of the powder cylinder ascends during working, a layer of powder is uniformly paved on the piston (working piston) of the forming cylinder by a powder paving roller, a computer controls a two-dimensional scanning track of a laser beam according to a slice model of a prototype, and solid powder materials are selectively sintered to form one layer of a part. After the powder is finished by one layer, the working piston descends by one layer thickness, and the powder paving system paves new powder. The laser beam is controlled to scan again to sinter the new layer. And repeating the steps repeatedly in such a way, and overlapping layer by layer until the three-dimensional part is molded. The powder need scrape the powder operation after spreading the powder and accomplishing, and current scrape the powder process and carry out reciprocal strickleing off to the powder through the scraper, and what in scraper reciprocating motion's in-process powder strickles off the effect ideal inadequately, also is not favorable to strickleing off the recovery of the unnecessary powder in back simultaneously.
Chinese patent CN114378314B discloses a powder scraping device for SLM metal powder printer, include work panel, scraper drive assembly, scraper subassembly and push away the material subassembly, the scraper subassembly includes scraper blade and leading truck, one side outer wall sliding connection of scraper blade has two sets of linkage plates, the bottom fixedly connected with scraper blade portion of scraper blade is two sets of the equal fixedly connected with cardboard of one side outer wall of linkage plate, be equipped with the draw-in groove of joint at the top of scraper blade between cardboard and the linkage plate, through the rotation of third motor both sides output, drive the third lead screw in step, make the pulling block of spiro union on the third lead screw be close to each other to the pulling pull rod is close to each other, drives ejector pin promotion both sides linkage plate and is close to each other, and the metal powder between them of linkage plate promotion gathers together to the centre, piles up unnecessary powder in the port department of inhaling the material passageway.
When the scraper of the device is used for scraping powder, certain powder is easily attached to one side of the scraper, which is in contact with the powder, and the bottom of the scraper, and certain influence on the leveling of the powder can be caused in the scraping process after long-term accumulation.
Disclosure of Invention
To above-mentioned problem, provide a scraper structure of 3D printer for SLM, through two scrapers at the reciprocating exchange position of scraper blade mount pad and carry out timely cleanness, thereby the scraper blade that does not possess the powder after the cleanness carries out the effect of strickleing off next to the powder assurance.
In order to solve the problems of the prior art, the invention adopts the technical scheme that:
a scraper structure of a 3D printer for an SLM comprises a scraper, a scraper mounting seat, a driving assembly and a fixed seat, wherein the fixed seat is respectively mounted at two ends of a printing platform, one end of the printing platform, which is close to the fixed seat, is provided with a powder collecting cavity, and the driving assembly drives the scraper mounting seat to horizontally move between the powder collecting cavities of the printing platform; the two scrapers are arranged on the scraper mounting seat in parallel; the bottom of the scraper mounting seat is provided with two limiting grooves extending in parallel along the length direction of the scraper, the openings of the limiting grooves face downwards, and the two scrapers are respectively installed in the limiting grooves in a sliding manner; the two scrapers are kept high and low in the scraper mounting seat, and the bottoms of the scrapers at the low positions scrape the powder on the printing platform; when a scraper in the scraper mounting seat moves to a fixed seat at one end of the printing platform, the height of the scraper is changed, and two sides of the limiting groove are attached to two sides of the scraper to scrape powder attached to the side wall of the scraper; the fixing base is installed the bottom scraper blade towards one side of scraper blade mount pad, and the spacing groove opening of bottom scraper blade laminating scraper blade mount pad strikes off the adnexed powder in scraper blade bottom surface.
Preferably, the scraper mounting seat further comprises a limiting seat and a rotating block, the limiting seat is fixedly mounted at two ends of the scraper mounting seat, horizontal limiting slide rails are arranged at two sides of the printing platform, and the limiting seat is slidably mounted on the limiting slide rails; the limiting seat is provided with two parallel sliding grooves, the sliding grooves are respectively positioned at two ends of the limiting groove and vertically extend, a shaft lever is arranged at the central position between the sliding grooves, and the axis of the shaft lever is parallel to the length direction of the scraper; two ends of the scraper are provided with horizontally extending adjusting rods which are inserted in the sliding grooves to slide; the center of the rotating block is provided with a shaft hole, the rotating block is rotatably arranged at the position of the shaft rod through the shaft hole, two ends of the rotating block are provided with kidney-shaped holes, and the adjusting rod is inserted in the kidney-shaped holes to slide; the fixing base is provided with the kicking block towards one side both ends of scraper blade mount pad, and the kicking block promotes rotatory piece and rotates the high position of regulation both ends scraper blade around the pivot pole.
Preferably, the scrapers are provided with horizontal inner cavities, the openings of the inner cavities are arranged towards one side of the fixed seat, and the inner cavities of the two scrapers are arranged in a reverse direction; a positioning rod and a first elastic piece are inserted in the inner cavity, the first elastic piece is elastically connected with the positioning rod, and the first elastic piece applies elastic force of the positioning rod protruding out of the surface of the scraper; waist-shaped grooves are respectively arranged on two sides of the scraper mounting seat, the waist-shaped grooves vertically extend, the width of each waist-shaped groove is matched with the diameter of the positioning rod, and a first elastic piece protruding out of the surface of the scraper is inserted into the waist-shaped grooves to slide; the scraper mounting seat is fixedly provided with a positioning seat outside the waist-shaped groove, the positioning seat is provided with a positioning sleeve, and one positioning rod of two scrapers on the scraper mounting seat is inserted in the positioning sleeve and matched with the rotating block to fix the height positions of the two scrapers.
Preferably, an ejector rod is fixedly mounted on one side, facing the scraper mounting seat, of the fixing seat, the axis of the ejector rod and the positioning sleeve of the positioning seat are located on the same straight line, the diameter of the ejector rod is the same as the inner diameter of the positioning sleeve, and the ejector rod is inserted into the positioning sleeve to push the positioning rod to enter the inner cavity.
Preferably, the top block is provided with a first guide rod extending from one side of the fixed seat, and the first guide rod is inserted into a first guide hole formed in the fixed seat; one end of the first guide rod is provided with a first limiting ring, and the outer diameter of the first limiting ring is larger than the diameter of the first guide hole; the second elastic piece is sleeved on the first guide rod and elastically connected with the ejector block and the fixed seat, and the second elastic piece applies elastic force for pushing the rotating block by the ejector block.
Preferably, the top of the scraper is provided with a second guide rod which vertically extends upwards, and the second guide rod is inserted into a second guide hole arranged at the top of the limiting groove of the scraper mounting seat.
Preferably, the second guide rod is sleeved with an elastic gasket, and the elastic gasket is located inside the limiting groove.
Preferably, the bottom of the scraper mounting seat is provided with an extension plate protruding out of the bottom surface of the scraper mounting seat, the extension plate is positioned between the two limiting grooves, and the bottom scraper is attached to the extension plate abutted to the bottom of the scraper mounting seat.
Preferably, the bottom scraping plate is provided with a third guide rod which horizontally extends towards one side of the fixed seat, and the third guide rod is inserted into a third guide hole formed in the fixed seat; a third limiting ring is arranged at one end of the third guide rod, and the outer diameter of the third limiting ring is larger than the diameter of the third guide hole; a third elastic piece is sleeved on the third guide rod and elastically connected with the fixed seat and the bottom scraper.
Preferably, the driving assembly comprises a first linear driving device and a connecting arm, the first linear driving device is fixedly installed on one side of the printing platform, and the working end of the first linear driving device is arranged on the length direction of the limiting slide rail and moves horizontally; the connecting arm is fixedly installed at the working end of the first linear driving device, and the first linear driving device is connected with the scraper blade installation seat through the connecting arm.
Compared with the prior art, the invention has the beneficial effects that:
the two scrapers are slidably mounted through the scraper mounting seat, the two scrapers are arranged in a high-low mode, the lower scraper scrapes powder when the scraper mounting seat moves, the higher scraper is internally arranged in the limiting groove of the scraper mounting seat, the two scrapers are exchanged when the scraper mounting seat moves to one side of the fixing seat, the scraper which just contacts the powder moves upwards, the two sides of the limiting groove are attached to the scraper and scrape the powder attached to the side wall of the scraper, the bottom scraper on one side of the fixing seat is attached to the powder attached to the bottom surface of the scraper and cleans the scrapers, the scrapers originally arranged in the limiting groove move downwards to a proper working position, so that the two scrapers can be cleaned timely during reciprocating movement of the scraper mounting seat, the cleaning difficulty is prevented from increasing due to powder accumulation, the effect of scraping the powder can be effectively guaranteed when the next scraping of the scrapers which do not occupy the powder after cleaning is carried out on the powder, and the quality of a 3D printing finished product is improved.
Drawings
FIG. 1 is a first perspective view of a scraper structure of a 3D printer for SLM mounted on a printing platform;
FIG. 2 is a second perspective view of a scraper structure of a 3D printer for SLM mounted on a printing platform;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
fig. 4 is a perspective view of a doctor blade structure of a 3D printer for SLM;
FIG. 5 is a partial enlarged view of FIG. 4 at B;
FIG. 6 is a side view of a squeegee, a squeegee mount, and a side mount of a squeegee structure of a 3D printer for an SLM;
FIG. 7 is a plan view of a squeegee, a squeegee mount, and a side holder of a squeegee structure of a 3D printer for an SLM;
FIG. 8 is a cross-sectional view taken at C-C of FIG. 7;
FIG. 9 is an enlarged view of a portion of FIG. 8 at D;
fig. 10 is a perspective view of a squeegee and a squeegee mount of a squeegee structure of a 3D printer for SLM;
FIG. 11 is an exploded perspective view of a squeegee and a squeegee mount of a squeegee structure of a 3D printer for SLM;
fig. 12 is a partial enlarged view at E of fig. 11;
fig. 13 is an exploded perspective view of a holder of a doctor blade structure of a 3D printer for SLM.
The reference numbers are:
1-a scraper; 11-adjusting rod; 12-an inner cavity; 121-a positioning rod; 122-a first resilient member; 13-a second guide bar; 131-a resilient pad; 2-a scraper mounting seat; 21-a limiting groove; 211-second pilot hole; 22-a limiting seat; 221-a sliding groove; 222-a shaft; 23-a rotating block; 231-shaft hole; 232-kidney shaped hole; 24-waist-shaped groove; 25-positioning seats; 251-a locating sleeve; 26-an extension plate; 3-a drive assembly; 31-a first linear drive; 32-a linker arm; 4-fixing the base; 41-bottom scraper; 411 — third guide bar; 412-a third stop collar; 413-a third elastic member; 42-a top block; 421-a first guide bar; 422-a first stop collar; 423-a second elastic member; 43-a top rod; 44-a first pilot hole; 45-third pilot hole; 5-a printing platform; 51-a powder collection chamber; 52-limit slide rail.
Detailed Description
For a better understanding of the features and technical solutions of the present invention, as well as the specific objects and functions attained by the present invention, reference is made to the accompanying drawings and detailed description of the invention.
Referring to fig. 1 to 13: a scraper structure of a 3D printer for an SLM comprises a scraper 1, a scraper mounting seat 2, a driving assembly 3 and a fixed seat 4, wherein the fixed seat 4 is respectively installed at two ends of a printing platform 5, one end of the printing platform 5, which is close to the fixed seat 4, is provided with a powder collecting cavity 51, and the driving assembly 3 drives the scraper mounting seat 2 to horizontally move between the powder collecting cavities 51 of the printing platform 5; the two scraping plates 1 are arranged on the scraping plate mounting seat 2 in parallel; the bottom of the scraper blade mounting seat 2 is provided with two limiting grooves 21 which extend in parallel along the length direction of the scraper blade 1, the openings of the limiting grooves 21 face downwards, and the two scraper blades 1 are respectively arranged in the limiting grooves 21 in a sliding manner; the two scrapers 1 are kept at a high position and a low position in the scraper mounting seat 2, and the bottom of the scraper 1 at the low position scrapes the powder on the printing platform 5; when the scraper 1 in the scraper mounting seat 2 moves to the fixed seat 4 at one end of the printing platform 5, the height of the scraper is changed, and two sides of the limiting groove 21 are attached to two sides of the scraper 1 to scrape off powder attached to the side wall of the scraper 1; the fixing seat 4 is provided with a bottom scraper 41 on one side facing the scraper mounting seat 2, and the bottom scraper 41 is attached to the opening of the limiting groove 21 of the scraper mounting seat 2 to scrape off powder attached to the bottom surface of the scraper 1.
The scraper structure of the invention comprises a scraper 1, a scraper mounting seat 2, a driving component 3 and a fixed seat 4, and is arranged on a printing platform 5, the fixed seat 4 is arranged at two ends of the printing platform 5, the driving component 3 drives the scraper mounting seat 2 to move between the fixed seats 4, the scraper 1 arranged on the scraper mounting seat 2 scrapes powder paved on the printing platform 5, two scrapers 1 arranged on the scraper mounting seat 2 are respectively arranged in a limiting groove 21 in a sliding way, the two scrapers 1 keep one higher and one lower in the scraper mounting seat 2, the bottom of the scraper 1 at the lower position keeps a proper working position, when the scraper mounting seat 2 moves, the powder is scraped, the scraper 1 at the higher position is arranged in the limiting groove 21 of the scraper mounting seat 2, when the scraper mounting seat 2 moves, one side of the scraper 1 at the lower position scrapes the powder, and then a certain amount of powder is adhered to the scraper, the scraper mounting seat 2 moves to one side of the fixing seat 4, the scraper 1 is positioned above the powder collecting cavity 51 of the printing platform 5, at the moment, the two scrapers 1 change positions, the scraper 1 which just contacts the powder moves upwards, the two sides of the limiting groove 21 are attached to the scraper 1 to scrape off the powder attached to the side wall of the scraper 1, the bottom scraper 41 on one side of the fixing seat 4 is attached to the opening of the limiting groove 21 of the scraper mounting seat 2 to scrape off the powder attached to the bottom surface of the scraper 1, the scraper 1 is cleaned, the scraped powder falls into the powder collecting cavity 51 to be collected in a centralized manner, the scraper 1 originally arranged in the limiting groove 21 moves downwards to a proper working position, and the powder is scraped off in the reverse movement of the scraper mounting seat 2, the two scrapers 1 in the embodiment can be cleaned timely in the reciprocating movement of the scraper mounting seat 2, and the cleaning difficulty caused by powder accumulation is prevented from increasing, the scraper blade 1 that does not possess the powder after the cleaning carries out the effect that can effectual assurance was strickleed off to the powder by strickleing off next time to the powder, improves 3D and prints off-the-shelf quality.
Referring to fig. 2, 3, 6 and 12: the scraper mounting seat 2 further comprises a limiting seat 22 and a rotating block 23, the limiting seat 22 is fixedly mounted at two ends of the scraper mounting seat 2, horizontal limiting slide rails 52 are arranged at two sides of the printing platform 5, and the limiting seat 22 is slidably mounted on the limiting slide rails 52; the limiting seat 22 is provided with two parallel sliding grooves 221, the sliding grooves 221 are respectively positioned at two ends of the limiting groove 21 and vertically extend, a shaft lever 222 is arranged at the central position between the sliding grooves 221, and the axis of the shaft lever 222 is parallel to the length direction of the scraper 1; two ends of the scraper 1 are provided with horizontally extending adjusting rods 11, and the adjusting rods 11 are inserted into the sliding grooves 221 to slide; the center of the rotating block 23 is provided with a shaft hole 231, the rotating block 23 is rotatably installed at the shaft lever 222 through the shaft hole 231, both ends of the rotating block 23 are provided with kidney-shaped holes 232, and the adjusting rod 11 is inserted in the kidney-shaped holes 232 to slide; the two ends of one side of the fixed seat 4 facing the scraper mounting seat 2 are provided with the top blocks 42, and the top blocks 42 push the rotating blocks 23 to rotate around the shaft rods 222 to adjust the height positions of the scrapers 1 at the two ends.
The scraper mounting seat 2 is mounted in the limiting slide rail 52 in a limiting manner through the limiting seats 22 on two sides to ensure the stability of the scraper mounting seat when moving, the adjusting rods 11 on two ends of the scraper 1 are inserted in the sliding grooves 221 of the limiting seats 22 to move in a limiting manner, the rotating block 23 inserted on the shaft rod 222 rotates to enable the adjusting rods 11 of the scraper 1 to be subjected to double limiting of the sliding grooves 221 and the waist-shaped holes 232 to realize the adjustment of the height positions of the two scrapers 1, when the driving assembly 3 drives the scraper mounting seat 2 to move to the fixing seat 4 on one side of the printing platform 5, the top block 42 arranged on the fixing seat 4 pushes the rotating block 23 to enable the rotating block 23 to rotate to adjust the height positions of the two scrapers 1, the scraper 1 in the limiting groove 21 moves downwards to carry out the next scraping operation, and the scraper 1 which originally scrapes powder enters the limiting groove 21 to be cleaned.
Referring to fig. 8, 9 and 11: the scrapers 1 are provided with horizontal inner cavities 12, the openings of the inner cavities 12 are arranged towards one side of the fixed seat 4, and the inner cavities 12 on the two scrapers 1 are reversely arranged; a positioning rod 121 and a first elastic member 122 are inserted in the inner cavity 12, the first elastic member 122 is elastically connected with the positioning rod 121, and the first elastic member 122 applies an elastic force that the positioning rod 121 protrudes out of the surface of the scraper 1; waist-shaped grooves 24 are respectively arranged at two sides of the scraper blade mounting seat 2, the waist-shaped grooves 24 vertically extend, the width of the waist-shaped grooves 24 is matched with the diameter of the positioning rods 121, and first elastic pieces 122 protruding out of the surface of the scraper blade 1 are inserted into the waist-shaped grooves 24 to slide; the scraper mounting seat 2 is positioned outside the waist-shaped groove 24 to fixedly mount the positioning seat 25, the positioning seat 25 is provided with a positioning sleeve 251, and one positioning rod 121 of the two scrapers 1 on the scraper mounting seat 2 is inserted into the positioning sleeve 251 to be matched with the rotating block 23 to fix the height positions of the two scrapers 1.
In order to make the driving assembly 3 drive the scraper mounting seat 2 to translate and drive the scraper 1 to keep stable the scraper 1 at the working position when scraping powder, in this embodiment, an inner cavity 12 is disposed on one side of the scraper 1, when two scrapers 1 rotate by the rotating block 23 to cause a high position and a low position, the positioning rod 121 of the scraper 1 on one side is inserted into the positioning sleeve 251 of the positioning seat 25 mounted on the limiting groove 21 under the elastic force of the first elastic member 122, so as to cooperate with the rotating block 23 to stabilize the position of the scraper 1, the first elastic member 122 may be a spring, because the positioning sleeves 251 of the positioning seats 25 are all at the same height, the positioning rod 121 of the scraper 1 at the higher position compresses the first elastic member 122 to enter the inner cavity 12, in this embodiment, the mounting position of the positioning seat 25 may be adjusted, when the positioning rod 121 of the scraper 1 is inserted into the positioning sleeve 251 of the positioning seat 25, the bottom of the scraper 1 is kept at the proper working position, and the positioning sleeve 251 may be located at the same axis as the positioning rod 121 of the scraper 1 at the higher position, or may be located at the same axis as the positioning rod 121 of the scraper 1 at the lower position.
Referring to fig. 8 and 9: the fixed seat 4 is fixedly provided with a push rod 43 towards one side of the scraper installation seat 2, the axis of the push rod 43 is in the same straight line with the positioning sleeve 251 of the positioning seat 25, the diameter of the push rod 43 is the same as the inner diameter of the positioning sleeve 251, and the push rod 43 is inserted into the positioning sleeve 251 to push the positioning rod 121 to enter the inner cavity 12.
In this embodiment, when the scraper mounting seat 2 moves to the fixing seat 4, the positioning rod 121 for positioning the position of the scraper 1 is inserted into the positioning sleeve 251 of the positioning seat 25 facing one side of the ejector rod 43, the ejector rod 43 on the fixing seat 4 is gradually inserted into the positioning sleeve 251 along with the approach of the scraper mounting seat 2, and the positioning rod 121 is pushed into the inner cavity 12 to release the positioning of the two scrapers 1, thereby facilitating the adjustment of the height position of the scraper 1 by the ejector block 42 of the fixing seat 4.
Referring to fig. 3, 5, 6 and 13: the top block 42 is provided with a first guide rod 421 extending from one side of the fixed seat 4, and the first guide rod 421 is inserted into a first guide hole 44 formed in the fixed seat 4; one end of the first guide rod 421 is provided with a first limit ring 422, and the outer diameter of the first limit ring 422 is larger than the diameter of the first guide hole 44; the first guide rod 421 is sleeved with a second elastic member 423, the second elastic member 423 is elastically connected to the top block 42 and the fixing base 4, and the second elastic member 423 applies an elastic force to the top block 42 to push the rotating block 23.
The top block 42 in this embodiment may be a block with an inclined plane, or may be a column, the top block 42 generates a thrust force on one side of the axis of the rotation block 23 along with the approaching of the driving assembly 3 to the scraper mounting base 2, because the scraper 1 is in a locked state at this time, when the rotation block 23 generates a pressure on the top block 42, the top block 42 compresses the second elastic member 423 and moves synchronously along with the rotation block 23, when the scraper mounting base 2 moves to above the powder collecting cavity 51, the push rod 43 enters the positioning sleeve 251 of the positioning seat 25 to unlock the scraper 1 from the positioning rod 121, at this time, the top block 42 resets under the elastic force of the second elastic member 423, and drives the rotation block 23 to rotate to adjust the height positions of the two scrapers 1, at this time, the positioning rod 121 of another scraper 1 enters the positioning sleeve 251 of the positioning seat 25 on the other side of the scraper mounting base 2 to be positioned, after the driving assembly 3 drives the scraper mounting base 2 to move to the other side, the top block 42 gradually resets, the first guide rod 421 ensures that the moving path of the top block 42 is stable, the first limit ring 422 prevents the top block 42 from moving excessively to separate from the fixing base 4, and the second elastic member 423 may be a spring.
Referring to fig. 3, 9 and 12: the top of the scraper 1 is provided with a second guide rod 13 extending vertically upwards, and the second guide rod 13 is inserted into a second guide hole 211 arranged at the top of the limiting groove 21 of the scraper mounting seat 2.
The second guide rod 13 is sleeved with an elastic pad 131, and the elastic pad 131 is located inside the limiting groove 21.
Because the top block 42 drives the rotating block 23 to rotate rapidly under the action of the elastic force after the scraper 1 is unlocked, in order to prevent the scraper 1 from impacting the top of the scraper mounting seat 2, a second guide rod 13 is arranged on the top of the scraper 1 in the embodiment and inserted into a second guide hole 211 on the top of the limiting groove 21, so that the movement of the scraper 1 is guided, and an elastic gasket 131 sleeved on the second guide rod 13 can move upwards on the scraper 1 to buffer, so that the scraper 1 is prevented from impacting the scraper mounting seat 2 to cause damage.
Referring to fig. 6, 8 and 13: the bottom of the scraper mounting seat 2 is provided with an extension plate 26 protruding out of the bottom surface of the scraper mounting seat 2, the extension plate 26 is positioned between the two limiting grooves 21, and the bottom scraper 41 is attached to the extension plate 26 abutted to the bottom of the scraper mounting seat 2.
The bottom scraping plate 41 is provided with a third guide rod 411 which horizontally extends towards one side of the fixed seat 4, and the third guide rod 411 is inserted into a third guide hole 45 arranged on the fixed seat 4; a third limiting ring 412 is arranged at one end of the third guide rod 411, and the outer diameter of the third limiting ring 412 is larger than the diameter of the third guide hole 45; the third guide rod 411 is sleeved with a third elastic element 413, and the third elastic element 413 is elastically connected with the fixed seat 4 and the bottom scraper 41.
In this embodiment, the scraper 1 facing the moving direction is always in a lower position to scrape the powder, when the scraper 1 moves to contact with the bottom scraper 41 of the fixing seat 4, the bottom scraper 41 abuts on one side of the scraper 1, along with the movement of the scraper mounting seat 2, the bottom scraper 41 compresses the third elastic member 413 to translate along with the driving component 3, when the scraper 1 is in locking contact, the scraper 1 in a lower position moves upwards, the bottom scraper 41 moves under the elastic force of the third elastic member 413 until abutting on the extension plate 26 at the bottom of the scraper mounting seat 2, the powder attached to the bottom of the scraper 1 is removed when the bottom scraper 41 abuts on the bottom of the scraper 1, and then when the scraper mounting seat 2 moves to the opposite side fixing seat 4, the third elastic member 413 drives the bottom scraper 41 to reset, the third guide rod 411 ensures that the moving path of the top block 42 is stable, the third limiting ring 412 prevents the top block 42 from excessively moving away from the fixing seat 4, and the third elastic member 413 may be a spring.
Referring to fig. 1 and 2: the driving assembly 3 comprises a first linear driving device 31 and a connecting arm 32, the first linear driving device 31 is fixedly installed on one side of the printing platform 5, and the working end of the first linear driving device 31 is arranged on the length direction of the limiting slide rail 52 and moves horizontally; the connecting arm 32 is fixedly mounted on the working end of the first linear driving device 31, and the first linear driving device 31 is connected with the scraper mounting seat 2 through the connecting arm 32.
The driving assembly 3 in this embodiment drives the scraper mounting seat 2 to move through the first linear driving device 31, the first linear driving device 31 may be a screw rod sliding table or a synchronous belt sliding table, etc., the first linear driving device 31 is connected to the upper side of the scraper mounting seat 2 through the connecting arm 32, and the connecting arm 32 avoids parts at two ends of the scraper mounting seat 2.
The above examples only show one or more embodiments of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent should be subject to the appended claims.

Claims (10)

1. The scraper structure of the 3D printer for the SLM is characterized by comprising a scraper (1), a scraper mounting seat (2), a driving assembly (3) and fixing seats (4), wherein the fixing seats (4) are respectively mounted at two ends of a printing platform (5), one end, close to the fixing seats (4), of the printing platform (5) is provided with a powder collecting cavity (51), and the driving assembly (3) drives the scraper mounting seat (2) to horizontally move between the powder collecting cavities (51) of the printing platform (5);
the two scraping plates (1) are arranged in parallel on the scraping plate mounting seat (2);
the bottom of the scraper mounting seat (2) is provided with two limiting grooves (21) which extend in parallel along the length direction of the scraper (1), the openings of the limiting grooves (21) face downwards, and the two scrapers (1) are respectively installed in the limiting grooves (21) in a sliding manner;
the two scrapers (1) are kept high and low in the scraper mounting seat (2), and the bottom of the scraper (1) at the low position scrapes the powder on the printing platform (5);
when a scraper (1) in the scraper mounting seat (2) moves to a fixed seat (4) at one end of a printing platform (5), the height of the scraper is changed, and two sides of a limiting groove (21) are attached to two sides of the scraper (1) to scrape powder attached to the side wall of the scraper (1);
a bottom scraper (41) is installed on one side, facing the scraper installation seat (2), of the fixing seat (4), and the bottom scraper (41) is attached to an opening of the limiting groove (21) of the scraper installation seat (2) to scrape off powder attached to the bottom surface of the scraper (1).
2. The scraper structure of the 3D printer for the SLM according to claim 1, wherein the scraper mounting base (2) further comprises a limiting base (22) and a rotating block (23), the limiting base (22) is fixedly installed at two ends of the scraper mounting base (2), horizontal limiting slide rails (52) are arranged at two sides of the printing platform (5), and the limiting base (22) is slidably installed on the limiting slide rails (52);
the limiting seat (22) is provided with two parallel sliding grooves (221), the sliding grooves (221) are respectively positioned at two ends of the limiting groove (21) and vertically extend, a shaft lever (222) is arranged at the central position between the sliding grooves (221), and the axis of the shaft lever (222) is parallel to the length direction of the scraper (1);
two ends of the scraper (1) are provided with horizontally extending adjusting rods (11), and the adjusting rods (11) are inserted into the sliding grooves (221) to slide;
the center of the rotating block (23) is provided with a shaft hole (231), the rotating block (23) is rotatably installed at the position of the shaft lever (222) through the shaft hole (231), both ends of the rotating block (23) are provided with waist-shaped holes (232), and the adjusting rod (11) is inserted in the waist-shaped holes (232) to slide;
the two ends of one side, facing the scraper mounting seat (2), of the fixing seat (4) are provided with the jacking blocks (42), and the jacking blocks (42) push the rotating blocks (23) to rotate around the shaft rods (222) to adjust the height positions of the scrapers (1) at the two ends.
3. The scraper structure of the 3D printer for the SLM according to claim 2, wherein the scraper (1) is provided with a horizontal inner cavity (12), the opening of the inner cavity (12) is arranged towards one side of the fixing seat (4), and the inner cavities (12) of the two scrapers (1) are arranged in opposite directions;
a positioning rod (121) and a first elastic piece (122) are inserted in the inner cavity (12), the first elastic piece (122) is elastically connected with the positioning rod (121), and the first elastic piece (122) applies elastic force of the positioning rod (121) protruding out of the surface of the scraper (1);
waist-shaped grooves (24) are respectively arranged on two sides of the scraper mounting seat (2), the waist-shaped grooves (24) vertically extend, the width of each waist-shaped groove (24) is matched with the diameter of the positioning rod (121), and a first elastic piece (122) protruding out of the surface of the scraper (1) is inserted into each waist-shaped groove (24) to slide;
the scraper mounting seat (2) is positioned at the outer side of the waist-shaped groove (24) and fixedly provided with a positioning seat (25), the positioning seat (25) is provided with a positioning sleeve (251), and a positioning rod (121) of two scrapers (1) on the scraper mounting seat (2) is inserted into the positioning sleeve (251) and is matched with the rotating block (23) to fix the height positions of the two scrapers (1).
4. The scraper structure of 3D printer for SLM according to claim 3, characterized in that the side of the fixing base (4) facing the scraper mounting base (2) is fixedly installed with a push rod (43), the axis of the push rod (43) is in the same line with the positioning sleeve (251) of the positioning base (25), the diameter of the push rod (43) is the same as the inner diameter of the positioning sleeve (251), and the push rod (43) is inserted into the positioning sleeve (251) to push the positioning rod (121) into the inner cavity (12).
5. The scraper structure of the 3D printer for the SLM according to claim 4, wherein the top block (42) is provided with a first guide rod (421) extending from one side of the fixed seat (4), and the first guide rod (421) is inserted into a first guide hole (44) formed in the fixed seat (4);
one end of the first guide rod (421) is provided with a first limiting ring (422), and the outer diameter of the first limiting ring (422) is larger than the diameter of the first guide hole (44);
the first guide rod (421) is sleeved with a second elastic piece (423), the second elastic piece (423) is elastically connected with the ejector block (42) and the fixed seat (4), and the second elastic piece (423) applies elastic force for pushing the rotating block (23) by the ejector block (42).
6. The scraper structure of 3D printer for SLM according to claim 5 is characterized in that the top of the scraper (1) is provided with a second guiding rod (13) extending vertically upwards, the second guiding rod (13) is inserted into a second guiding hole (211) arranged on the top of the limiting groove (21) of the scraper mounting base (2).
7. The scraper structure of the 3D printer for the SLM according to claim 6, wherein the second guiding rod (13) is sleeved with an elastic gasket (131), and the elastic gasket (131) is located inside the limiting groove (21).
8. The scraper structure of 3D printer for SLM according to claim 1 is characterized in that the bottom of the scraper mounting seat (2) is provided with an extension plate (26) protruding from the bottom surface of the scraper mounting seat (2), the extension plate (26) is located between the two limiting grooves (21), and the bottom scraper (41) is attached to the bottom of the scraper mounting seat (2) and abuts against the extension plate (26).
9. The doctor structure of the SLM 3D printer according to claim 8, wherein the bottom blade (41) is provided with a third guiding rod (411) extending horizontally towards one side of the fixing base (4), the third guiding rod (411) is inserted into a third guiding hole (45) provided on the fixing base (4);
one end of the third guide rod (411) is provided with a third limiting ring (412), and the outer diameter of the third limiting ring (412) is larger than the diameter of the third guide hole (45);
a third elastic piece (413) is sleeved on the third guide rod (411), and the third elastic piece (413) is elastically connected with the fixed seat (4) and the bottom scraping plate (41).
10. The scraper structure of 3D printer for SLM according to claim 1, characterized in that the driving assembly (3) comprises a first linear driving device (31) and a connecting arm (32), the first linear driving device (31) is fixedly installed at one side of the printing platform (5), the working end of the first linear driving device (31) is arranged to move horizontally in the length direction of the limit slide (52);
the connecting arm (32) is fixedly arranged at the working end of the first linear driving device (31), and the first linear driving device (31) is connected with the scraper mounting seat (2) through the connecting arm (32).
CN202211159294.3A 2022-09-22 2022-09-22 Scraper structure of 3D printer for SLM Pending CN115464160A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211159294.3A CN115464160A (en) 2022-09-22 2022-09-22 Scraper structure of 3D printer for SLM

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211159294.3A CN115464160A (en) 2022-09-22 2022-09-22 Scraper structure of 3D printer for SLM

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CN115464160A true CN115464160A (en) 2022-12-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116587604A (en) * 2023-05-29 2023-08-15 首都博物馆 Intelligent processing equipment for shock-proof clamping pieces of cultural relics in collection

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116587604A (en) * 2023-05-29 2023-08-15 首都博物馆 Intelligent processing equipment for shock-proof clamping pieces of cultural relics in collection
CN116587604B (en) * 2023-05-29 2023-11-14 首都博物馆 Intelligent processing equipment for shock-proof clamping pieces of cultural relics in collection

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