阅读说明：本技术 一种增材制造装置及增材制造方法 (Additive manufacturing device and additive manufacturing method ) 是由 郭超 鲁金鑫 孙永鑫 李龙 马旭龙 阚文斌 于 2020-06-17 设计创作，主要内容包括：本发明属于增材制造技术领域,公开了一种增材制造装置及增材制造方法,增材制造装置包括粉箱,设置于粉箱下方的铺粉平台,设置于铺粉平台上的刮刀,还包括设置于铺粉平台两侧的挡粉板,设置于至少一个挡粉板处的落粉通道,以及设置于落粉通道处的传感器,挡粉板被配置为堆积刮刀铺粉后的剩余粉末；落粉通道被配置为在剩余粉末堆积至落粉通道的入口处时,供部分剩余粉末落入；传感器被配置为检测落入落粉通道内的粉末的落粉信息,以控制粉箱下一次送粉时输送的粉末量。本发明能够控制粉箱下一次送粉时输送的粉末量,以达到剩余粉末重复利用的目的,增大了粉末利用率,使得粉箱内的粉末可以供应长时间打印。(The invention belongs to the technical field of additive manufacturing, and discloses an additive manufacturing device and an additive manufacturing method, wherein the additive manufacturing device comprises a powder box, a powder laying platform arranged below the powder box, a scraper arranged on the powder laying platform, powder blocking plates arranged on two sides of the powder laying platform, a powder falling channel arranged at least one powder blocking plate, and a sensor arranged at the powder falling channel, wherein the powder blocking plates are configured to accumulate residual powder laid by the scraper; the powder falling channel is configured to allow part of the residual powder to fall when the residual powder is accumulated to the inlet of the powder falling channel; the sensor is configured to detect falling powder information of the powder falling into the falling powder channel to control the amount of the powder conveyed by the powder box at the next powder feeding. The invention can control the powder quantity conveyed by the powder box when the powder is fed next time, so as to achieve the aim of recycling the residual powder, increase the utilization rate of the powder and ensure that the powder in the powder box can be supplied for long-time printing.)

1. The additive manufacturing device comprises a powder box (1), a powder laying platform (2) arranged below the powder box (1), and a scraper (3) arranged on the powder laying platform (2), and is characterized by further comprising powder blocking plates (4) arranged on two sides of the powder laying platform (2), a powder falling channel (5) arranged at least one powder blocking plate (4), and a sensor (6) arranged at the powder falling channel (5), wherein the powder blocking plates (4) are configured to accumulate residual powder laid by the scraper (3); the powder falling channel (5) is configured to allow a part of the residual powder to fall when the residual powder is accumulated to an inlet of the powder falling channel (5); the sensor (6) is configured to detect powder falling information of the powder falling into the powder falling channel (5) to control the amount of the powder conveyed by the powder box (1) at the next powder feeding.

2. The additive manufacturing device according to claim 1, wherein a first through hole is formed in a vertical side wall of at least one powder baffle (4), and the first through hole is communicated with the powder falling channel (5).

3. The additive manufacturing device according to claim 1, wherein a second through hole is formed in the powder laying platform (2) at least one powder baffle (4), and the second through hole is communicated with the powder falling channel (5).

4. Additive manufacturing device according to claim 2 or 3, wherein a powder collecting box (7) is arranged at the outlet of the powder falling channel (5), and the powder collecting box (7) is used for collecting powder falling out through the powder falling channel (5).

5. Additive manufacturing device according to claim 2 or 3, wherein one or two powder boxes (1) are arranged, the powder baffle plate (4) is correspondingly arranged below one or two powder boxes (1), and when two powder boxes (1) are arranged, the two powder boxes (1) are arranged on two sides or the same side of the powder laying platform (2).

6. Additive manufacturing device according to claim 5, wherein the powder bin (1) is provided with a horizontal plate (41) parallel to the powder platform (2) on top of the powder baffle (4) not corresponding to the powder bin (1);

or, powder case (1) be provided with two and all set up in when spreading powder platform (2) with one side, not corresponding powder case (1) keep off powder board (4) top and be on a parallel with spread horizontal plate (41) of powder platform (2).

7. An additive manufacturing method performed by an additive manufacturing apparatus according to any one of claims 1-6, comprising the steps of:

s1, when the scraper (3) spreads powder, stacking the residual powder spread by the scraper (3) through a powder baffle plate (4);

s2, when the residual powder is accumulated to the inlet of the powder falling channel (5) and falls into the powder falling channel (5), detecting the powder falling information of the powder falling into the powder falling channel (5) through a sensor (6);

and S3, comparing the powder falling information with preset information, and controlling the powder quantity conveyed by the powder box (1) in the next powder feeding according to the comparison result.

8. The additive manufacturing method according to claim 7, wherein in the step S2, the powder falling information is a total amount of powder falling into the powder falling passage (5) or a total length of time of the powder falling into the powder falling passage (5).

9. The additive manufacturing method according to claim 8, wherein in step S3, when the total amount of powder falling into the powder falling passage (5) exceeds a preset amount, the powder box (1) is controlled to reduce the amount of powder to be conveyed at the next powder feeding;

or when the total time of the powder falling into the powder falling channel (5) exceeds the preset time, controlling the powder box (1) to reduce the powder amount conveyed in the next powder feeding process.

10. The additive manufacturing method according to claim 9, wherein the powder bin (1) is controlled to stop feeding powder when the total amount exceeds the preset first preset value;

or controlling the powder box (1) to stop feeding the powder when the total time length exceeds a second preset value of the preset time length.

Technical Field

The invention relates to the technical field of additive manufacturing, in particular to an additive manufacturing device and an additive manufacturing method.

Background

In the additive manufacturing process, the amount of powder conveyed by each layer is usually larger than that required by each layer, and the residual powder after each time of powder paving and conveying can overflow to the powder collecting box or be stacked on two sides of the powder taking position and can not participate in the next layer of powder paving and conveying, so that the residual powder can be stacked or overflowed all the time, and the amount of powder required by long-time printing is influenced.

Disclosure of Invention

The invention aims to provide an additive manufacturing device and an additive manufacturing method, and aims to solve the problem that the existing residual powder is low in utilization rate.

In order to achieve the purpose, the invention adopts the following technical scheme:

the additive manufacturing device comprises a powder box, a powder spreading platform arranged below the powder box, a scraper arranged on the powder spreading platform, powder blocking plates arranged on two sides of the powder spreading platform, a powder falling channel arranged at least one powder blocking plate, and a sensor arranged at the powder falling channel, wherein the powder blocking plates are configured to accumulate residual powder after powder spreading by the scraper; the powder falling channel is configured to allow part of the residual powder to fall when the residual powder is accumulated to an inlet of the powder falling channel; the sensor is configured to detect falling powder information of the powder falling into the falling powder channel to control the amount of the powder conveyed by the powder box when the powder is fed next time.

Preferably, a first through hole is formed in a vertical side wall of at least one of the powder blocking plates, and the first through hole is communicated with the powder falling channel.

Preferably, a second through hole is formed in the powder laying platform at least one powder baffle, and the second through hole is communicated with the powder falling channel.

Preferably, a powder collecting box is arranged at an outlet of the powder falling channel and used for collecting powder falling through the powder falling channel.

Preferably, the powder box is provided with one or two, one or two the below correspondence of powder box is equipped with keep off the powder board, just when the powder box sets up to two, two the powder box set up in shop powder platform's both sides or same side.

Preferably, when one powder box is arranged, a horizontal plate parallel to the powder spreading platform is arranged at the top of the powder baffle plate which does not correspond to the powder box;

or, the powder case be provided with two and all set up in when spreading powder platform with one side, not corresponding the powder case keep off powder board top and be on a parallel with spread the horizontal plate of powder platform.

The invention also provides an additive manufacturing method, which is executed by the additive manufacturing device and comprises the following steps:

s1, when the powder is spread by a scraper, the residual powder after the powder is spread by the scraper is piled up by a powder baffle;

s2, when the residual powder is accumulated to the inlet of the powder falling channel and falls into the powder falling channel, detecting the powder falling information of the powder falling into the powder falling channel through a sensor;

and S3, comparing the powder falling information with preset information, and controlling the powder quantity conveyed by the powder box when the powder is fed next time according to the comparison result.

Preferably, in the step S2, the powder falling information is a total amount of the powder falling into the powder falling channel or a total time length of the powder falling into the powder falling channel.

Preferably, in step S3, when the total amount of the powder falling into the powder falling passage exceeds a preset amount, the powder box is controlled to reduce the amount of the powder conveyed in the next powder feeding;

or when the total time of the powder falling into the powder falling channel exceeds the preset time, controlling the powder box to reduce the powder quantity conveyed in the next powder feeding process.

Preferably, when the total amount exceeds the preset first preset value, the powder box is controlled to stop feeding powder;

or controlling the powder box to stop feeding the powder when the total time length exceeds a second preset value of the preset time length.

The invention has the beneficial effects that: piling up remaining powder through setting up the powder baffle, it can be so that the powder is the slope form, and set up the powder falling channel, when remaining powder piles up enough much, there is the powder entering powder falling channel, detect the powder falling information (if powder falling amount or powder falling time) of the powder that falls into through the sensor afterwards, can know how much of accumulational powder according to this powder falling information, when accumulational powder is more, the powder volume of carrying when can controlling the powder case next time and sending the powder, in order to reach surplus powder reuse's purpose, the powder utilization ratio has been increased, make the powder of powder incasement can supply and print for a long time.

Drawings

Fig. 1 is a schematic structural diagram of an additive manufacturing apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an additive manufacturing apparatus according to an embodiment of the present invention;

fig. 3 is a flowchart of an additive manufacturing method according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an additive manufacturing apparatus according to a second embodiment of the present invention.

In the figure:

1. powder box; 11. a vibrator; 2. a powder laying platform; 3. a scraper; 4. a powder baffle plate; 41. a horizontal plate; 5. a powder falling channel; 6. a sensor; 7. powder collecting box; 8. and a forming cylinder.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.