CN111086214B - Flexible rod of belt powder paving device - Google Patents
Flexible rod of belt powder paving device Download PDFInfo
- Publication number
- CN111086214B CN111086214B CN201911180514.9A CN201911180514A CN111086214B CN 111086214 B CN111086214 B CN 111086214B CN 201911180514 A CN201911180514 A CN 201911180514A CN 111086214 B CN111086214 B CN 111086214B
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- roller
- belt
- frame
- annular scraping
- bolt
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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
- B29C64/218—Rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
Abstract
The invention discloses a belt-type flexible roller powder spreading device, which comprises: a frame; the mounting rack is arranged at the bottom side of the rack; the first roller is rotatably connected to the mounting frame; the second roller is rotatably connected to the mounting frame and positioned below the first roller, and the rotation axis of the first roller is parallel to that of the second roller; the rotary driving device is connected with the first roller or the second roller in a driving way; the annular scraping belt bypasses the first roller and the second roller and is in transmission connection with the first roller and the second roller, and the outer surface of the annular scraping belt is a processing surface.
Description
Technical Field
The invention relates to additive manufacturing equipment, in particular to a belt type flexible roller powder spreading device.
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.
The powder bed type additive manufacturing forming process is easy to generate the phenomena of part warping deformation, powder splashing, powder gathering and the like, the interaction between the powder laying device and the powder bed protruding part in the powder laying process is one of the key technical problems to be solved, the existing powder laying device mainly comprises a powder laying scraper and a powder laying roller, and the roller type powder laying device can obtain a special powder laying effect due to the fact that the powder flowability and a certain compaction force can be applied in powder laying. At present, the powder spreading roller is mainly made of metal, ceramic and rubber materials, the requirement on surface processing is high, the manufacturing cost is high, and when the powder spreading roller is damaged due to uncertain factors in the forming process, great resource waste is caused. Therefore, the roller type powder spreading device is urgently needed to be improved, so that the cyclic utilization is realized, and the durability of the roller type powder spreading device is improved.
Disclosure of Invention
The invention aims to provide a belt type flexible roller powder spreading device, which is used for solving one or more technical problems in the prior art and at least providing a beneficial selection or creation condition.
The solution of the invention for solving the technical problem is as follows:
a flexible rod powder paving device of belt formula includes: a frame; the mounting rack is arranged at the bottom side of the rack; the first roller is rotatably connected to the mounting frame; the second roller is rotatably connected to the mounting frame and positioned below the first roller, and the rotation axis of the first roller is parallel to that of the second roller; the rotary driving device is connected with the first roller or the second roller in a driving way; and the annular scraping belt bypasses the first roller and the second roller and is in transmission connection with the first roller and the second roller, and the outer surface of the annular scraping belt is a processing surface.
The technical scheme at least has the following beneficial effects: the annular is scraped the area and is convoluteed on first cylinder and second cylinder, utilize and rotate first cylinder of drive arrangement drive or second cylinder and rotate, scrape the area through the annular and wind the transmission, it rotates to drive second cylinder or first cylinder again, the surface that the area was scraped to the annular is the machined surface, the second cylinder is adding pressure man-hour, the area is scraped to the annular when the translation is controlled wholly to the frame and is rotated and realize the successive layer compaction and spread the powder, the area is scraped to removable another side or change annular when the surface of area compaction powder is scraped to the annular, keep cylinder and other parts, need to change whole set of cylinder device after avoiding the machined surface to scrape the damage, improve whole utilization efficiency, reduce equipment manufacturing and application cost.
As a further improvement of the technical scheme, a third roller is rotatably connected to the mounting frame and is located in the annular scraping belt, and the third roller is in transmission connection with the annular scraping belt. A third roller is added in the annular scraping belt and used for changing the transmission characteristic, improving the wrap angle and changing the powder compaction characteristic in the powder paving process.
As a further improvement of the technical scheme, the rack is connected with first bolts in a matched mode through threads, the number of the first bolts is not less than two, and the bottom ends of the first bolts are connected to the mounting rack. Rotate first bolt, adjust the cooperation degree of first bolt and base to adjust the position state of mounting bracket, make the bottom surface of second cylinder keep the horizontality, ensure to spread the powder evenly, improve the shaping quality.
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 rack, and the bottom end of the pre-tightening spring abuts against the mounting rack. The pre-tightening spring provides pre-tightening force, so that a good stress state is kept between the rack and the mounting frame.
As a further improvement of the above technical scheme, a guide groove is formed in the mounting frame, a connecting shaft is inserted in the guide groove, one end of the connecting shaft is fixedly connected with a tensioning frame, the other end of the connecting shaft is connected with a tensioning roller through a bearing, the tensioning roller abuts against the outer surface of the annular scraping belt, and at least one second bolt is connected between the tensioning frame and the mounting frame. The pressure exerted on the annular scraping belt by the tensioning roller can be adjusted by adjusting the second bolt to change the position of the connecting shaft on the guide groove, so that the tensioning state of the annular scraping belt between the first roller and the second roller is adjusted.
As a further improvement of the above technical solution, the rotation driving device includes a driving motor, and the driving motor is connected to the first roller, the second roller or the third roller in a driving manner. The first roller, the second roller or the third roller can be driven to rotate by electric power.
As a further improvement of the above technical solution, the annular 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 schematic side view of the present invention without the slider and linear guide.
In the drawings: 100-machine frame, 200-mounting frame, 210-first roller, 220-second roller, 230-rotary driving device, 240-annular scraping belt, 250-first bolt, 260-pre-tightening spring, 270-guide groove, 300-tensioning frame, 310-tensioning roller, 320-second bolt, 400-sliding block and 410-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, a belt-type flexible roller powder spreading device includes: a frame 100; a mounting bracket 200 disposed at a bottom side of the rack 100; a first roller 210 rotatably connected to the mounting bracket 200; a second roller 220 rotatably connected to the mounting bracket 200, wherein the second roller 220 is located below the first roller 210, and the rotation axis of the first roller 210 is parallel to the rotation axis of the second roller 220; the rotary driving device 230, the rotary driving device 230 is connected to the first roller 210 or the second roller 220 in a driving manner; and an annular scraping belt 240 which bypasses the first roller 210 and the second roller 220 and is in transmission connection with the first roller 210 and the second roller 220, wherein the outer surface of the annular scraping belt 240 is a processing surface.
From the above, the annular scraping belt 240 is wound around the first roller 210 and the second roller 220, the rotation driving device 230 is used to drive the first roller 210 or the second roller 220 to rotate, the second roller 220 or the first roller 210 is driven to rotate through the flexible transmission of the annular scraping belt 240, the outer surface of the annular scraping belt 240 is a processing surface, the second roller 220 applies pressure during processing, the annular scraping belt 240 rotates to compact and spread powder layer by layer when the whole rack 100 translates left and right, the rotation axis of the first roller 210 is perpendicular to the powder spreading direction, when the outer surface of the powder compacted by the annular scraping belt 240 is damaged, the other surface or the annular scraping belt 240 can be replaced, the rollers and other components are reserved, the whole set of roller device is prevented from being replaced after the processing surface is scraped, the whole utilization efficiency is improved, and the manufacturing and application cost of the device is reduced.
In some embodiments, a third roller is rotatably connected to the mounting frame 200, and the third roller is located in the annular scraping belt 240 and is in transmission connection with the annular scraping belt 240. A third roller is added in the annular scraping belt 240 for changing the transmission characteristic, improving the wrap angle and changing the powder compaction characteristic in the powder laying process, and like the third roller, a fourth roller, a fifth roller and the like can also be added on the mounting frame 200.
In some embodiments, the printer further comprises a sliding block 400 and a linear guide rail 410, the sliding block 400 is slidably connected with the linear guide rail 410, the linear guide rail 410 is laid along the powder laying direction, the moving direction of the sliding block 400 is parallel to the powder laying direction, two ends of the rack 100 are respectively fixedly connected with the sliding block 400, the linear guide rail 410 is connected with an external 3D printer rack, and the axis of the roller is perpendicular to the sliding direction and the powder laying direction of the sliding block 400.
In some embodiments, a first bolt 250 is connected to the frame 100 by a screw-fit, two first bolts 250 are provided, and a bottom end of the first bolt 250 is connected to the mounting bracket 200. The first bolt 250 is rotated, and the matching degree of the first bolt 250 and the base is adjusted, so that the position state of the mounting frame 200 is adjusted, the bottom surface of the second roller 220 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 250 is coupled to the mounting bracket 200 through a bearing, so that when the first bolt 250 rotates on the frame 100, the coupling state between the first bolt 250 and the mounting bracket 200 is not changed, and the horizontal state of the second roller 220 is preferably adjusted.
In some embodiments, a pre-tightening spring 260 is sleeved outside the first bolt 250, a top end of the pre-tightening spring 260 abuts against the frame 100, and a bottom end of the pre-tightening spring 260 abuts against the mounting bracket 200. The pre-tightening spring 260 provides a pre-tightening force to keep a good stress state between the rack 100 and the mounting bracket 200.
In some embodiments, the mounting frame 200 is provided with a guide groove 270, a connecting shaft is inserted into the guide groove 270, one end of the connecting shaft is fixedly connected with a tensioning frame 300, the other end of the connecting shaft is connected with a tensioning roller 310 through a bearing, the tensioning roller 310 abuts against the outer surface of the annular scraping belt 240, and at least one second bolt 320 is connected between the tensioning frame 300 and the mounting frame 200. By changing the position of the guide groove 270 by adjusting the second bolt, the pressure of the tension roller 310 on the endless wiping belt 240 can be adjusted, thereby adjusting the tension of the endless wiping belt 240 between the first roller 210 and the second roller 220. Similarly, the tension roller 310 is fixedly connected to the connecting shaft, and one end of the connecting shaft is connected to the tension frame 300 through a bearing, so that only the position of the bearing is changed, which is an equivalent technical solution of this embodiment.
In some embodiments, the rotation driving device 230 includes a driving motor, and the driving motor is drivingly connected to the first roller 210, the second roller 220, or the third roller. The first roller 210, the second roller 220, or the third roller may be driven to rotate by an electric motor.
In some embodiments, the annular scraping belt 240 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 (4)
1. The utility model provides a powder device is spread to flexible rod of belt, its characterized in that: the method comprises the following steps:
a frame (100);
a mounting rack (200) arranged at the bottom side of the rack (100);
the first roller (210) is rotatably connected to the mounting frame (200);
a second roller (220) rotatably connected to the mounting frame (200), wherein the second roller (220) is located below the first roller (210), and the rotation axis of the first roller (210) is parallel to the rotation axis of the second roller (220);
a rotary driving device (230), wherein the rotary driving device (230) is connected with the first roller (210) or the second roller (220) in a driving way;
a slider (400) connected to the frame (100);
a linear guide rail (410) which is connected with the sliding block (400) in a sliding way, wherein the rotation axis of the second roller (220) is vertical to the sliding direction of the sliding block (400);
the annular scraping belt (240) bypasses the first roller (210) and the second roller (220) and is in transmission connection with the first roller (210) and the second roller (220), the outer surface of the annular scraping belt (240) is a machined surface, a guide groove (270) is formed in the mounting frame (200), a connecting shaft is inserted in the guide groove (270), one end of the connecting shaft is fixedly connected with a tensioning frame (300), the other end of the connecting shaft is connected with a tensioning roller (310) through a bearing, the tensioning roller (310) is abutted to the outer surface of the annular scraping belt (240), at least one second bolt (320) is connected between the tensioning frame (300) and the mounting frame (200), a first bolt (250) is connected to the frame (100) in a threaded fit mode, at least two first bolts (250) are arranged on the first bolt (250), and the bottom end of the first bolt (250) is connected to the mounting frame (200) through a bearing, the first bolt (250) is sleeved with a pre-tightening spring (260), the top end of the pre-tightening spring (260) abuts against the rack (100), and the bottom end of the pre-tightening spring (260) abuts against the mounting rack (200).
2. The belt-type flexible stick dusting device of claim 1, characterized in that: the mounting bracket (200) is rotatably connected with a third roller, the third roller is positioned in the annular scraping belt (240), and the third roller is in transmission connection with the annular scraping belt (240).
3. The belt-type flexible stick dusting device of claim 1, characterized in that: the rotation driving device (230) comprises a driving motor which is connected to the first roller (210), the second roller (220) or the third roller in a driving way.
4. The belt-type flexible stick dusting device of claim 1, characterized in that: the annular scraping belt (240) is made of rubber, plastic or metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911180514.9A CN111086214B (en) | 2019-11-27 | 2019-11-27 | Flexible rod of belt powder paving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911180514.9A CN111086214B (en) | 2019-11-27 | 2019-11-27 | Flexible rod of belt powder paving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111086214A CN111086214A (en) | 2020-05-01 |
| CN111086214B true CN111086214B (en) | 2022-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911180514.9A Active CN111086214B (en) | 2019-11-27 | 2019-11-27 | Flexible rod of belt powder paving device |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3423014B2 (en) * | 1992-10-02 | 2003-07-07 | アルプス電気株式会社 | Method and apparatus for dividing ceramic substrate |
| CN206779461U (en) * | 2017-05-29 | 2017-12-22 | 安徽科元三维技术有限公司 | SLS printer powderings mechanism |
| CN109177154A (en) * | 2018-10-26 | 2019-01-11 | 华侨大学 | A kind of increasing material manufacturing power spreading device with rigid baffle |
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