CN111016172B - Flexible powder scraper of spreading of belt - Google Patents
Flexible powder scraper of spreading of belt Download PDFInfo
- Publication number
- CN111016172B CN111016172B CN201911180501.1A CN201911180501A CN111016172B CN 111016172 B CN111016172 B CN 111016172B CN 201911180501 A CN201911180501 A CN 201911180501A CN 111016172 B CN111016172 B CN 111016172B
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- China
- Prior art keywords
- roller
- base
- belt
- pressing block
- scraper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
- B29C64/214—Doctor blades
-
- 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
-
- 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
-
- 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
- B22F10/10—Formation of a green body
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/22—Driving means
- B22F12/226—Driving means for rotary motion
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
-
- 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)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
The invention discloses a belt-type flexible powder spreading scraper, which comprises a base, wherein the base is provided with: the pressing block is arranged on the base; the first roller is arranged on the base and is positioned on one side of the pressing block; the second roller is arranged on the base and positioned on the other side of the pressing block, and the rotation axis of the second roller is parallel to that of the first roller; a scraping belt, one end of which is wound on the first roller, and the other end of which is wound on the second roller; the flexible scraper is characterized in that the top surface of the scraping belt abuts against the pressing block, and the bottom surface of the scraping belt is a processing surface.
Description
Technical Field
The invention relates to additive manufacturing equipment, in particular to a belt type flexible powder laying scraper.
Background
Additive manufacturing is commonly known as 3D printing, is an advanced manufacturing technology developed based on a layered manufacturing principle, powder bed type additive manufacturing is an additive manufacturing process which is widely researched and applied at present, and common powder bed additive manufacturing processes comprise selective laser sintering, selective laser melting, direct metal forming, selective electron beam melting and the like. The process principle generally comprises the following steps: and the powder spreading device spreads a layer of powder on the processing bin, the control system enables the processing heat source to selectively melt the powder according to the slice data of each layer to obtain the shape of the layer of the formed part, then the processing bin descends by one layer, the powder spreading device spreads another layer of powder, the heat source continues to selectively form the layer of powder, and the process is repeated.
As the phenomena of part warping deformation, powder splashing, powder gathering and the like are easy to occur in the powder bed type additive manufacturing and forming process, the interaction between the powder laying device and the powder bed convex part in the powder laying process is one of the key problems to be solved. The existing powder spreading device mainly comprises a powder spreading scraper and a powder spreading roller, wherein the powder spreading scraper has the advantages of simple structure, low cost, small size and the like, and is widely applied. Early technology adopted metal scraper blade structure, but the scraper blade can strike the part in the powder process of spreading, and the striking will lead to the shaping failure when serious. Therefore, the existing powder spreading scraper adopts an elastic metal sheet and flexible rubber block structure. However, because the rigidity of the metal sheet and the rubber block is low, the metal sheet and the rubber block are seriously abraded in the forming process, even when the part is scraped by a convex part and a notch appears, the scrapping and the powder spreading of the scraper are not uniform, the forming process needs to be interrupted at the moment, the forming bin is opened, the scraper clamp is disassembled, the scraper is replaced, the scraper is leveled again, the replacing process wastes time and labor, the forming surface is easily oxidized, and the forming quality is influenced.
Disclosure of Invention
The invention aims to provide a belt type flexible powder spreading scraper, which solves one or more technical problems in the prior art and at least provides a beneficial selection or creation condition.
The solution of the invention for solving the technical problem is as follows:
the utility model provides a flexible powder scraper of spreading of belt, includes the base, be provided with on the base: the pressing block is arranged on the base; the first roller is arranged on the base and is positioned on one side of the pressing block; the second roller is arranged on the base and positioned on the other side of the pressing block, and the rotation axis of the second roller is parallel to that of the first roller; a scraping belt, one end of which is wound on the first roller, and the other end of which is wound on the second roller; the sliding block is connected with the base; the linear guide rail is connected with the sliding block in a sliding mode, and the rotating axis of the second roller is perpendicular to the sliding direction of the sliding block; the top surface of the scraping belt is abutted to the pressing block, and the bottom surface of the scraping belt is a processing surface.
The technical scheme at least has the following beneficial effects: the scraping belt is wound on the first roller and the second roller, the pressing block is used for scraping the belt and downwards pressing the belt, the scraping belt part of the lower end face of the pressing block forms a scraping blade, the moving direction of the scraping belt is parallel to the powder spreading direction when powder is spread, when the blade is scraped and damaged, the first roller and the second roller are rotated, the contact part of the scraping belt and the pressing block is changed, a new scraping blade part is formed, so that a flexible scraper is constructed by the scraping belt, the formed part is prevented from being impacted and damaged, and meanwhile, when the flexible scraper is scraped and damaged by a protruding part of a powder bed, the flexible scraper is rapidly updated without stopping the machine or dismounting the clamp, the forming quality and efficiency are improved, and the updating cost of the scraper is reduced.
As a further improvement of the above technical solution, a synchronous belt is connected between the first roller and the second roller in a transmission manner. The synchronous belt can ensure the synchronous movement of the first roller and the second roller, and the tension force of the scraping belt is better kept unchanged.
As a further improvement of the technical scheme, the base is connected with a first bolt through thread fit, the number of the first bolts is not less than two, and the pressing block is connected to the bottom end of the first bolt. The first bolt is rotated, and the matching degree of the first bolt and the base is adjusted, so that the position state of the pressing block is adjusted, the bottom surface of the pressing block is kept in a horizontal state, and the forming quality is ensured.
As a further improvement of the above technical scheme, a pre-tightening spring is sleeved outside the first bolt, the top end of the pre-tightening spring abuts against the base, and the bottom end of the pre-tightening spring abuts against the pressing block. The pre-tightening spring provides pre-tightening force, so that a good stress state is kept between the base and the pressing block.
As a further improvement of the above technical solution, a guide groove is provided on the base, a connecting shaft is connected in the second drum through a bearing, one end of the connecting shaft passes through the guide groove and is fixedly connected with a tensioning frame, the connecting shaft moves back and forth in the guide groove along a direction close to or away from the first drum, and at least one second bolt is connected between the tensioning frame and the base. The center distance between the first roller and the second roller can be adjusted by adjusting the position of the connecting shaft in the guide groove, so that the tensioning state of a synchronous belt and a scraping belt between the first roller and the second roller can be adjusted.
As a further improvement of the technical scheme, the first roller is provided with a rocker. Rocking the rocker causes the first roller to rotate.
As a further improvement of the above technical solution, a ratchet wheel is arranged on the first roller, a stopping pawl is rotatably connected to the base, and the stopping pawl is inserted into any tooth socket of the ratchet wheel. When the first roller rotates forwards, the damaged scraping belt is rotated to the second roller, the complete scraping belt on the first roller is rotated to the lower part of the pressing block, and the locking claw is matched with the ratchet wheel to prevent the first roller from rotating backwards.
As a further improvement of the technical scheme, the first roller is in transmission connection with a driving motor. The first roller can be driven to rotate by electric power.
As a further improvement of the above technical solution, the scraping belt is made of rubber, plastic or metal.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a front view of the present invention;
fig. 3 is a schematic view of the sectional structure a-a of fig. 2.
In the drawings: 100-base, 110-pressing block, 120-first roller, 130-second roller, 140-scraping belt, 150-synchronous belt, 160-first bolt, 170-pre-tightening spring, 200-tensioning frame, 210-second bolt, 300-sliding block and 310-linear guide rail.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the connection relations mentioned herein do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.
Referring to fig. 1 and 2, the flexible powder scraper of shop of belt formula includes base 100, be provided with on the base 100: a pressing block 110 disposed on the base 100; a first roller 120 disposed on the base 100 and located at one side of the pressing block 110; a second roller 130 disposed on the base 100 and located at the other side of the pressing block 110, wherein a rotation axis of the second roller 130 and a rotation axis of the first roller 120 are parallel to each other; a scraper 140 having one end wound around the first drum 120 and the other end wound around the second drum 130; the top surface of the scraping belt 140 abuts against the pressing block 110, and the bottom surface of the scraping belt 140 is a processing surface.
From the above, the scraping belt 140 is wound around the first roller 120 and the second roller 130, the pressing block 110 presses the scraping belt 140 downwards, so that the scraping belt 140 portion on the lower end face of the pressing block 110 forms a scraping edge, the moving direction of the scraping belt 140 during powder spreading is parallel to the powder spreading direction, when the cutting edge is scraped, the first roller 120 and the second roller 130 are rotated, the contact position of the scraping belt 140 and the pressing block 110 is changed, a new scraping edge portion is formed, thus the scraping belt 140 is configured into a flexible scraper, the formed part is prevented from being impacted and damaged, and when the flexible scraper is scraped by the protruding portion of the powder bed, the flexible scraper can be rapidly updated without stopping and dismounting a clamp, the forming quality and efficiency are improved, and the scraper updating cost is reduced.
In some embodiments, the printer further comprises a sliding block 300 and a linear guide rail 310, the sliding block 300 is slidably connected with the linear guide rail 310, the linear guide rail 3100 is laid along the powder laying direction, the moving direction of the sliding block 300 is parallel to the powder laying direction, two ends of the base 100 are respectively fixedly connected with the sliding block, the linear guide rail 310 is connected with an external 3D printer frame, and the axis of the roller is perpendicular to the sliding direction and the powder laying direction of the sliding block 300.
In some embodiments, a timing belt 150 is drivingly connected between the first roller 120 and the second roller 130. The timing belt 150 can ensure the first roller 120 and the second roller 130 to move synchronously, so as to better maintain the tension of the scraping belt 140.
As shown in fig. 3, in some embodiments, a first bolt 160 is connected to the base 100 through a screw-fit connection, no less than two first bolts 160 are provided, and the pressing block 110 is connected to a bottom end of the first bolt 160. The first bolt 160 is rotated, and the matching degree of the first bolt 160 and the base 100 is adjusted, so that the position state of the pressing block 110 is adjusted, the bottom surface of the pressing block 110 is kept in a horizontal state, the powder is uniformly spread, and the forming quality is improved.
In some embodiments, the bottom end of the first bolt 160 is connected to the pressing block 110 through a bearing, so that when the first bolt rotates on the base 100, the connection state between the first bolt 160 and the pressing block 110 does not change, and the horizontal state of the pressing block 110 is better adjusted.
In some embodiments, a pre-tightening spring 170 is sleeved outside the first bolt 160, a top end of the pre-tightening spring 170 abuts against the base 100, and a bottom end of the pre-tightening spring 170 abuts against the pressing block 110. The pre-tightening spring 170 provides a pre-tightening force to keep a good stress state between the base 100 and the pressing block 110.
In some embodiments, a guide groove is formed on the base 100, a connecting shaft is connected to the second roller 130 through a bearing, one end of the connecting shaft passes through the guide groove and is fixedly connected to a tensioning frame 200, the connecting shaft moves back and forth in the guide groove in a direction close to or away from the first roller 120, at least one second bolt 210 is connected between the tensioning frame 200 and the base 100, and the tensioning frame 200 is pressed on the base 100. By adjusting the position of the connecting shaft in the guide groove, the center distance between the first roller 120 and the second roller 130 can be adjusted, so that the tension state of the synchronous belt 150 and the scraping belt 140 between the first roller 120 and the second roller 130 can be adjusted. Similarly, the second roller 130 is fixedly connected to the connecting shaft, and one end of the connecting shaft is connected to the tensioning frame 200 through a bearing, so that only the position of the bearing is changed, which is an equivalent technical solution of the present embodiment.
In some embodiments, a rocker is disposed on the first roller 120. Rocking the rocker causes the first roller 120 to rotate.
In some embodiments, the first roller 120 is provided with a ratchet wheel, and the base 100 is rotatably connected with a pawl inserted into any one of the teeth of the ratchet wheel. When the first roller 120 rotates forward, the damaged scraping belt 140 is transferred to the second roller 130, the complete scraping belt 140 on the first roller 120 is transferred to the lower part of the pressing block 110, and the locking pawl and the ratchet wheel are matched to prevent the first roller 120 from rotating reversely.
In some embodiments, the brake mechanism on the first roller 120 may also be a drum brake.
In some embodiments, the first roller 120 is drivingly connected to a drive motor. The first roller 120 may be driven to rotate by an electric motor.
In some embodiments, the scraping belt 140 is made of rubber, plastic or metal, such as a belt, elastic silica gel or carbon fiber composite.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.
Claims (6)
1. The utility model provides a flexible whitewashed scraper of shop of belt formula which characterized in that: including base (100), be provided with on base (100):
the pressing block (110) is arranged on the base (100);
the first roller (120) is arranged on the base (100) and is positioned on one side of the pressing block (110);
the second roller (130) is arranged on the base (100) and is positioned on the other side of the pressing block (110), the rotating axis of the second roller (130) is parallel to that of the first roller (120), and a synchronous belt (150) is in transmission connection between the first roller (120) and the second roller (130);
a scraper (140) having one end wound around the first drum (120) and the other end wound around the second drum (130);
a slider (300) connected to the base (100);
a linear guide rail (310) which is connected with the sliding block (300) in a sliding way, wherein the rotation axis of the second roller (130) is vertical to the sliding direction of the sliding block (300);
the top surface of the scraping belt (140) is abutted to the pressing block (110), the bottom surface of the scraping belt (140) is a machined surface, a guide groove is formed in the base (100), a connecting shaft is connected into the second roller (130) through a bearing, one end of the connecting shaft penetrates through the guide groove and is fixedly connected with a tensioning frame (200), the connecting shaft moves back and forth in the guide groove along the direction close to or far away from the first roller (120), at least one second bolt (210) is connected between the tensioning frame (200) and the base (100), a ratchet wheel is arranged on the first roller (120), a stopping claw is connected onto the base (100) in a rotating mode and is inserted into any tooth socket of the ratchet wheel.
2. The belt-type flexible dusting scraper of claim 1, characterized in that: the base (100) is connected with a first bolt (160) through thread fit, the number of the first bolt (160) is not less than two, and the pressing block (110) is connected to the bottom end of the first bolt (160).
3. A belt-type flexible dusting scraper as claimed in claim 2, characterised in that: the first bolt (160) is sleeved with a pre-tightening spring (170), the top end of the pre-tightening spring (170) abuts against the base (100), and the bottom end of the pre-tightening spring (170) abuts against the pressing block (110).
4. The belt-type flexible dusting scraper of claim 1, characterized in that: the first roller (120) is provided with a rocker.
5. The belt-type flexible dusting scraper of claim 1, characterized in that: the first roller (120) is in transmission connection with a driving motor.
6. The belt-type flexible dusting scraper of claim 1, characterized in that: the scraping belt (140) is made of rubber, plastic or metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911180501.1A CN111016172B (en) | 2019-11-27 | 2019-11-27 | Flexible powder scraper of spreading of belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911180501.1A CN111016172B (en) | 2019-11-27 | 2019-11-27 | Flexible powder scraper of spreading of belt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111016172A CN111016172A (en) | 2020-04-17 |
| CN111016172B true CN111016172B (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911180501.1A Active CN111016172B (en) | 2019-11-27 | 2019-11-27 | Flexible powder scraper of spreading of belt |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021125296A1 (en) | 2021-09-29 | 2023-03-30 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | Manufacturing system and method for the additive manufacturing of a component within a build-up area of a powder bed |
| CN114653973B (en) * | 2022-03-22 | 2023-04-07 | 中国地质大学（武汉） | Directional powder feeding device and selective laser melting and forming equipment |
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| EP0867248A1 (en) * | 1997-03-24 | 1998-09-30 | Katayama Special Industries, Ltd. | Method of manufacturing porous metal sheet and metal sheet manufactured by this method |
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| Publication number | Publication date |
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| CN111016172A (en) | 2020-04-17 |
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