CN210450984U

CN210450984U - Scraper device and additive manufacturing equipment

Info

Publication number: CN210450984U
Application number: CN201921393665.8U
Authority: CN
Inventors: 任治倪; 张钊尉; 黄洁; 梁宏超; 马瑞芩; 余志君
Original assignee: Shanghai Aircraft Manufacturing Co Ltd
Current assignee: Shanghai Aircraft Manufacturing Co Ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-05-05
Anticipated expiration: 2029-08-26

Abstract

The utility model discloses a scraper device and vibration material disk equipment relates to vibration material disk and makes technical field. This scraper device includes the scraper, the scraper includes that the multistage can dismantle the scraper cutter body of connecting in proper order, each the scraper cutter body all is configured to can follow first direction removal of predetermineeing alone, so that the scraper cutter body has a plurality of powder heights of scraping. Can avoid card sword position part and with card sword position part the printing of the part on the same scraper motion route pertinence through this scraper device, do not influence the printing of other position parts, save time and economic cost to a great extent.

Description

Scraper device and additive manufacturing equipment

Technical Field

The utility model relates to a vibration material disk technical field especially relates to a scraper device and vibration material disk equipment.

Background

The additive manufacturing technology is an advanced manufacturing technology for directly manufacturing parts by driving three-dimensional data of the parts based on a discrete-accumulation principle. After the special software is used for slicing and layering the three-dimensional model of the part to obtain two-dimensional section data, the laser beam rapidly melts metal powder according to the two-dimensional section data by a specific scanning strategy, and the manufacturing of the three-dimensional solid part is realized by layer-by-layer powder laying and solidification accumulation. Compared with the traditional processing technology, the method reduces the dependence on a cutter and a clamp, does not need a plurality of processing procedures, and can quickly realize the free manufacture of parts on one device.

The powder laying quality is crucial to the quality of finished parts. Only when the powder is spread evenly and smoothly, the metal powder layer can be ensured to absorb the laser beam stably, and a smooth product surface is obtained. At present, a scraper device is often adopted to ensure powder laying uniformity for metal additive manufacturing. Wherein, the scraper plays an important role, and the quality of the scraper determines the quality of powder paving each time. The scraper mainly comprises a metal scraper, a hairbrush scraper, a ceramic scraper and the like. The metal scraper can be used for printing a fine structure, powder is spread uniformly, and parts are not allowed to deform excessively; the sensitivity of the brush type scraper to parts or support deformation and salient points on the surface layer of the parts in the printing process is smaller than that of a metal scraper, but fine grains or left-right non-uniformity phenomenon exists in powder paving, and the precision of the formed parts needs to be ensured by a subsequent machine; ceramic blades perform similarly to metal blades, and the blade edge is more wear-resistant, but the material is correspondingly more brittle. Therefore, in daily use, a proper scraper needs to be selected according to the type of powder, for example, a stainless steel metal scraper is selected for aluminum alloy powder, high-temperature alloy powder and titanium alloy powder, and a ceramic scraper is selected for stainless steel powder.

The doctor blade is usually provided in one piece. However, in the actual powder spreading process, buckling deformation or sintering melting is likely to occur, large-particle convex points are generated and left on the surface of the part, and at the moment, if the scraper meets the buckling deformation or the convex point of the part, the situation of cutter clamping can occur. Since a plurality of different parts are usually printed on one substrate at the same time, it may cause printing failure of all the parts in a serious case.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a scraper device and vibration material disk equipment can avoid the printing of card sword position part and the part that is in the same scraper motion route with this position part and does not influence the printing of other parts, saves time and economic cost to a great extent.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a scraper device, includes the scraper, the scraper includes that the multistage can dismantle the scraper cutter body of connection in proper order, each the scraper cutter body all is configured to can follow first preset direction alone and removes, so that the scraper cutter body has a plurality of powder heights of scraping.

Optionally, one of the two adjacent scraper bodies is provided with a clamping groove, and the other scraper body is provided with a clamping block which can be clamped in the clamping groove.

Optionally, at least one first positioning hole is formed in one of the two adjacent scraper blade bodies, a plurality of second positioning holes are formed in the other one of the two adjacent scraper blade bodies at intervals, and a connecting member is selectively arranged through one of the first positioning holes and one of the second positioning holes, so that the scraper blade body has a plurality of powder scraping heights.

Optionally, at least part of the lengths of the segments of the scraper body are different.

Optionally, the scraper device further comprises a scraper baffle, and the scraper baffle is detachably connected with the scraper.

Optionally, the doctor blade baffle comprises a multi-segment doctor blade baffle monomer.

Optionally, the scraper baffle monomers are detachably connected in sequence.

Optionally, the scraper device further comprises a scraper support, the scraper support is detachably connected with the scraper baffle, and the scraper is arranged between the scraper baffle and the scraper support.

Optionally, a limiting part is arranged on the scraper support and used for limiting the movement of the scraper along the first preset direction.

The utility model also provides an additive manufacturing equipment, include as above scraper device.

The utility model has the advantages that:

the utility model provides a scraper device and vibration material disk equipment through setting up the scraper into the scraper cutter body that the connection can be dismantled in proper order to the multistage, can realize the independent removal of arbitrary one section scraper cutter body, makes each section scraper cutter body all have a plurality of powder heights of scraping to avoid the printing of card sword position part and the part that is in on the same scraper motion route with this position part pertinence, and do not influence the printing of other position parts.

Drawings

Fig. 1 is a schematic perspective exploded view of a scraper provided by the present invention;

fig. 2 is a schematic structural view of a scraper with a certain section of scraper body height adjusted according to the present invention;

fig. 3 is a schematic structural diagram of the scraper, the scraper baffle and the scraper support provided by the present invention after being matched.

In the figure:

1. a scraper; 11. a scraper body; 12. a card slot; 13. a clamping block; 14. a first positioning hole; 15. a second positioning hole; 2. a scraper baffle plate; 21. a third positioning hole; 3. a scraper support; 31. a limiting part; 4. a first connecting member; 5. a second connecting member.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

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, detachably 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. 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", "left", "right", and the like are used in the orientation or positional relationship 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 specific orientation, be constructed in a specific orientation, and be operated, 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.

The present embodiment provides a doctor apparatus. As shown in fig. 1, the scraper 1 of the scraper device includes a multi-segment scraper body 11, and the multi-segment scraper body 11 is detachably connected to form a whole. When the scraper 1 is used for scraping and leveling a powder spreading layer, the scraper body 11 of each section of scraper can be independently adjusted to move along a first preset direction, so that the powder scraping height can be adjusted. When a certain part is warped or a salient point is generated due to sintering and melting in the printing process to cause cutter clamping, the scraper cutter body 11 corresponding to the cutter clamping position can be adjusted, so that the powder scraping height of the scraper cutter body 11 is increased, the part at the cutter clamping position and the part on the same scraper motion path with the part at the position are avoided from being printed, the printing of the parts at other positions is not influenced, the whole printing failure is avoided, and the time and the economic cost can be greatly saved.

Optionally, two adjacent scraper bodies 11 are connected by means of clamping grooves 12 and clamping blocks 13. As shown in fig. 1, one end of each of the two adjacent scraper bodies 11 is provided with a locking groove 12, and the other end of each of the two adjacent scraper bodies 11 is provided with a locking block 13, and the locking blocks 13 are placed in the corresponding locking grooves 12 to complete the connection of the two adjacent scraper bodies 11. Through the connection mode of joint, can make the connection between each section scraper cutter body 11 more firm to convenient the dismantlement. Of course, in other embodiments, other ways of connecting the scraper blade body 11 may be used, such as connecting members.

Optionally, in order to improve the joint strength of the scraper bodies 11 at the two adjacent ends and avoid the separation in the powder scraping process, in this embodiment, the scraper bodies 11 at the two adjacent ends are connected by the clamping and connecting members. In order to realize the connecting piece connection, a positioning hole for mounting the first connecting piece 4 is arranged on each scraper body section 11. Specifically, as shown in fig. 1 and 2, one of the two adjacent scraper blade bodies 11 is provided with a first positioning hole 14, and the other is provided with a second positioning hole 15. When the first connecting member 4 simultaneously passes through the first positioning hole 14 and the second positioning hole 15, the connection between the adjacent two blade bodies 11 is achieved. In this embodiment, the first connecting member 4 is a positioning pin, and the first positioning hole 14 and the second positioning hole 15 are light holes. Of course, in other embodiments, the first connecting member 4 may be a bolt, and the first positioning hole 14 and the second positioning hole 15 may be threaded holes.

Further, in order to make the scraper blade body 11 have a plurality of powder scraping heights, in the present embodiment, as shown in fig. 1, the number of the first positioning holes 14 and the second positioning holes 15 is multiple, and the plurality of first positioning holes 14 and the plurality of second positioning holes 15 are arranged at intervals along the second preset direction. When the powder scraping height of the scraper body 11 needs to be adjusted, the first connecting piece 4 can be provided with one of the first positioning holes 14 and one of the second positioning holes 15. Of course, in other embodiments, a first positioning hole 14 and a plurality of second positioning holes 15 may be provided, and when the powder scraping height of the scraper blade body 11 needs to be adjusted, the position of the first connecting member 4 passing through the first positioning hole 14 is kept unchanged, so that the positioning pin passes through the second positioning holes 15 at different positions, and thus, the scraper blade body 11 of a certain section can be independently lifted or lowered. Similarly, only one second positioning hole 15 and a plurality of first positioning holes 14 may be provided.

In this embodiment, the second predetermined direction is vertical to the first predetermined direction, and the distance between two adjacent first positioning holes 14 or two adjacent second positioning holes 15 is the minimum distance for the scraper body 11 to move. Of course, the second preset direction can be obliquely arranged relative to the vertical direction, so that the powder scraping height can be adjusted, and the length of the whole scraper can be adjusted. The number, the spacing and the arrangement direction of the first positioning holes 14 and the second positioning holes 15 can be adjusted according to actual needs. In this embodiment, the first positioning holes 14 and the second positioning holes 15 are correspondingly arranged, the number of the first positioning holes 14 is 3, and the distance between two adjacent first positioning holes 14 or two adjacent second positioning holes 15 is 1-2 mm.

Alternatively, at least some of the multiple segments of the doctor body 11 may have different lengths, for example, each segment of the doctor body 11 may have a different length, or some of the doctor bodies 11 may have the same length and the remaining segments of the doctor body 11 may have different lengths. In the actual printing process, since the sizes of the parts at different printing positions may be different, the scraper body 11 with the corresponding length can be set according to the sizes of the parts at the printing positions, so as to improve the universality of the scraper device.

After the scraper body 11 of a certain section is lifted and adjusted, the integral stability of the scraper in the operation process is influenced to a certain extent due to the height difference between the scraper body 11 and the adjacent scraper body 11. To avoid this effect, a doctor blade guard 2 may be provided, as shown in fig. 3. The doctor back 2 is provided with a third positioning hole 21 corresponding to the first positioning hole 14 and the second positioning hole 15 of the doctor body 11. When the first connecting member 4 passes through the first positioning hole 14 and the second positioning hole 15 of the scraper blade body 11 and then passes through the third positioning hole 21 of the scraper guard 2, the scraper guard 2 can be connected with each scraper blade body 11. Because the height of the scraper baffle 2 is fixed all the time and the scraper baffle cannot move up and down, the overall stability of the scraper 1 connected with the scraper baffle can be ensured. Of course, in other embodiments, in order to connect the scraper guard 2 and the scraper 1, a positioning hole only used for connecting the scraper guard 2 and the scraper 1 may be separately provided, and other connecting members are used to penetrate through the positioning hole to connect the scraper guard 2 and the scraper 1.

Alternatively, the blade guard 2 may comprise a multi-segment blade guard monomer. The length, number and third positioning holes 21 of the scraper bar elements are arranged to correspond to the scraper blade body 11. At this time, each scraper baffle single body can be correspondingly connected with one scraper blade body 11, so that the scraper blade body 11 at the designated position can be conveniently detached without influencing the scraper blade bodies 11 at other positions. Furthermore, in order to more conveniently realize the detachment of the scraper baffle monomers, the scraper baffle monomers can be connected with each other in a clamping mode through the clamping grooves and the clamping blocks.

Optionally, the doctor apparatus further comprises a doctor holder 3 for facilitating the mounting and use of the doctor. As shown in fig. 3, when the scraper needs to be installed, the scraper body 11 of each scraper is integrated into a whole to form the scraper 1, the scraper 1 is connected with the scraper baffle 2 through the first connecting piece 4, then the scraper 1 is arranged between the scraper baffle 2 and the scraper support 3, the scraper baffle 2 is connected with the scraper support 3 through the second connecting piece 5, and the installation of the scraper can be completed. During installation, the cutting edge of the scraper blade body 11 should also be kept down, i.e. towards the part forming platform. Through the combined action of the scraper baffle 2 and the scraper support 3, the installation of the scraper 1 is facilitated, and the back-and-forth movement of the scraper 1 is limited, so that the operation of the scraper in the powder scraping process is more stable. Specifically, the second connecting member 5 may be a bolt, and threaded holes for mounting the bolt are provided on both the scraper baffle 2 and the scraper support 3.

When the scraper guard 2 and the scraper support 3 are mounted, as shown in fig. 3, a groove-shaped space is formed therebetween, and when the height of the scraper blade needs to be adjusted, the scraper blade body 11 can move up and down freely in the groove-shaped space, which is not favorable for the alignment operation of the first positioning hole 14 or the second positioning hole 15 on the scraper blade body 11 and the third positioning hole 21 on the scraper guard 2, and thus the first connecting member 4 is not convenient to mount. Therefore, in order to restrict free rise of the doctor blade body 11, the stopper portion 31 is provided in the groove-shaped space, and the stopper portion 31 is positioned above the doctor blade 1. In this embodiment, the limiting portion 31 is a boss structure and is disposed on the scraper support 3, and the scraper body 11 stops moving when moving up to contact the limiting portion 31. Further, when the distance between the limiting portion 31 and the upper edge of the scraper 1 is consistent with the distance between two adjacent first positioning holes 14 or second positioning holes 15 on the scraper body 11, the scraper body 11 is moved up to contact the limiting portion 31, so that the movement with the distance of one hole interval can be realized, and the alignment and installation of the first connecting piece 4 are more convenient.

To clarify the function of the doctor blade device in the present embodiment in the printing process of the parts, the following description will be made in detail by taking the situation that a blade is jammed at a certain part printing position in the printing process as an example:

1. before the print job is executed, the blade device is mounted. Taking the blade device shown in fig. 3 as an example, first, the blade 1 and the blade guard 2 are connected by the first connecting member 4, and the blade 1 and the blade guard 2 are assembled integrally. Thereafter, the doctor blade guard 2 and the doctor blade holder 3 are connected using the second connecting member 5, completing the mounting of the doctor apparatus. Specifically, if a stainless steel scraper is used, when the first connecting member 4 is a positioning pin, the positioning pin can be an MS20253P1 series pin or a self-made metal pin rod with a diameter of about 1mm, and the specific selection is determined according to the sizes of the scraper and the scraper baffle; when the second connecting piece 5 is a bolt, the bolt is required to be screwed in sequence from the middle of the scraper baffle plate 2 to two sides when the bolt is fixed, the bolt is screwed for multiple times in steps, and the screwing torque is gradually increased from 8N m to 14N m.

2. After the installation of the doctor apparatus is completed, the printing job is started.

3. When a cutter is jammed in the printing process, the printing tasks of all the parts in the part forming cabin are suspended, and the forming cabin is opened according to the corresponding program. At the same time, to prevent oxidation of the powder at high temperatures, the forming chamber can be opened half an hour after the print job is stopped.

Note: if the forming cabin is provided with a highly integrated mechanical arm, the embodiment can directly control the mechanical arm to finish the lifting operation of the sectional scraper without opening the cabin door.

4. To facilitate the adjustment of the scraper, the forming table is operated to descend by a certain height h.

5. The height of the scraper body 11 corresponding to the position of the cutter clamping is independently adjusted. During adjustment, firstly, the connection between the position scraper baffle monomer and the scraper support 3 and the connection between the position scraper baffle monomer and the position scraper cutter body 11 are sequentially loosened, secondly, the position scraper cutter body 11 is moved upwards, then the connection between the position scraper cutter body 11 and the position scraper baffle monomer is recovered through the first connecting piece 4, the connection between the position scraper baffle monomer and the scraper support 3 is recovered through the second connecting piece 5, and the independent adjustment of the height of the position scraper cutter body 11 can be completed.

6. After the adjustment is finished, resetting the scraper system, and then moving the forming platform upwards, wherein if the formed part of the part is not considered to be cooled and shrunk, the rising height of the forming platform is the descending height h in the step 4; if the formed part of the part is cooled and shrunk, after the forming platform is lifted to reach the height h, the forming platform is lifted slowly and the scraper moving operation is carried out in a matching way for a plurality of times until the formed part of the part is observed to be slightly contacted with the scraper 1.

7. And after the forming platform moves upwards, closing the forming cabin to prepare for recovering the printing task.

8. Before the printing task is recovered, the printing tasks of the parts corresponding to the cutter clamping positions and the parts on the same scraper movement path with the parts at the positions are independently cancelled, and the printing tasks of the parts at other positions are only recovered. In the subsequent printing process, the powder can still be continuously spread at the position where the part printing task is cancelled, so that the difference between the powder spreading height of the position and the powder spreading height of other positions is avoided, and the collapse and landslide of the powder spreading layer can be avoided.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. The scraper device is characterized by comprising a scraper (1), wherein the scraper (1) comprises a plurality of scraper bodies (11) which are sequentially detachably connected, and each scraper body (11) is configured to be capable of moving along a first preset direction independently, so that the scraper bodies (11) have a plurality of powder scraping heights.

2. The scraper device of claim 1, wherein one of two adjacent scraper bodies (11) is provided with a locking groove (12), and the other scraper body is provided with a locking block (13), and the locking block (13) can be locked in the locking groove (12).

3. The doctor apparatus as claimed in claim 1, wherein at least one first positioning hole (14) is provided in one of two adjacent segments of the doctor body (11), and a plurality of second positioning holes (15) are provided in another one of the two adjacent segments, and a connecting member is selectively provided through one of the first positioning holes (14) and one of the second positioning holes (15) to provide the doctor body (11) with a plurality of doctor heights.

4. A doctor arrangement according to claim 1, characterized in that at least parts of the lengths of the doctor body (11) differ.

5. Doctor arrangement according to claim 1, characterized in that it further comprises a doctor blade apron (2), which doctor blade apron (2) is detachably connected to the doctor blade (1).

6. Doctor arrangement according to claim 5, characterized in that the doctor blade apron (2) consists of a multi-segment doctor blade apron monomer.

7. The doctor apparatus as claimed in claim 6, wherein a plurality of segments of the doctor back monomers are detachably connected in sequence.

8. The doctor apparatus as claimed in claim 5, characterised in that it further comprises a doctor support (3), the doctor support (3) being detachably connected to the doctor blade apron (2), the doctor blade (1) being arranged between the doctor blade apron (2) and the doctor support (3).

9. Doctor arrangement according to claim 8, characterized in that the doctor holder (3) is provided with a stop (31) for limiting the movement of the doctor (1) in the first predetermined direction.

10. An additive manufacturing apparatus comprising a doctor apparatus according to any of claims 1-9.