CN204639133U - A kind of laser powder sinter molding machine had at the bottom of liftable bucket - Google Patents

Abstract

The utility model discloses a laser powder sintering molding machine with a liftable bucket bottom. The main point of the technical scheme is that it includes a frame, and a powder adding device is arranged on the frame. A powder scraping platform is provided to receive the powder discharged from the powder adding device, a forming powder bucket is provided under the powder scraping platform, and a powder scraping platform is provided between the powder adding device and the powder scraping platform The powder layered on the top is scraped to the powder scraping mechanism in the molding powder bucket, and the laser generating device for sintering the powder layer in the molding powder bucket is also installed on the frame, and the molding powder bucket is equipped with movable At the bottom of the bucket, the frame is provided with a driving device that drives the bottom of the movable bucket to slide up and down. The bottom of the bucket is the support assembly that makes the bottom of the bucket move up and down along the inner wall of the bucket. The structure is simple and the operation is convenient.

Description

A laser powder sintering molding machine with a liftable barrel bottom

【Technical field】

The utility model relates to a laser powder sintering rapid forming machine, in particular to a laser powder sintering forming machine with a lifting barrel bottom

【Background technique】

3D printers can be realized through a variety of technologies, and the most widely used in industrialization is the laser powder sintering technology SLS. The SLS method uses an infrared laser as the energy source, and most of the modeling materials used are powder materials. During processing, the powder is first preheated to a temperature slightly lower than its melting point, and then the powder is paved under the action of the powder scraping mechanism; the laser beam is selectively sintered according to the information of the layered section under the control of the computer. One layer, the bottom of the barrel must be lowered by a distance of the thickness of the powder layer, and then a new powder layer is laid on the bottom of the barrel for sintering. After all the sintering is completed, the excess powder is removed to obtain the sintered parts.

In the existing laser powder sintering rapid prototyping machine, the mechanism that enables the bottom of the bucket to slide along the inner wall of the bucket is too complicated and inconvenient to operate.

The utility model is made based on this situation.

【Content of utility model】

The purpose of the utility model is to overcome the deficiencies of the prior art, and to provide a novel laser powder sintering rapid prototyping machine with simple structure, high safety factor, convenient operation and practicality of the bucket bottom lifting mechanism.

The utility model is achieved through the following technical solutions:

A laser powder sintering molding machine with a liftable barrel bottom, comprising a frame 1, a powder adding device 2 is arranged on the frame 1, and a receiving device for receiving the powder adding device is arranged below the powder adding device 2 2. A powder scraping platform 3 for the discharged powder. A molding powder barrel 5 is provided under the powder scraping platform 3. A powder scraping platform 3 is provided between the powder adding device 2 and the powder scraping platform 3. The powder is scraped in layers to the powder scraping mechanism 6 in the molding powder bucket 5. The frame 1 is also provided with a laser generator 4 for sintering the powder layer in the molding powder bucket 5. The molding powder bucket 5 is provided with a movable bucket bottom 51, which is characterized in that: the frame 1 is provided with a driving device that drives the movable bucket bottom 51 to slide up and down, and the driving device includes a driving assembly 8 and a 5. The bottom is connected to the driving assembly 8 and is used to push and pull the movable bucket bottom 51 to make the movable bucket bottom 51 lift along the inner wall of the bucket.

As mentioned above, the laser powder sintering molding machine with a liftable barrel bottom is characterized in that: the support assembly 9 includes a connecting frame 91 connected to the drive assembly 8 and capable of lifting under the drive of the drive assembly 8, the connection Both sides of the frame 91 are provided with side beams 912 and connecting beams 911 connecting the two side beams 912. On the two side beams 912, there are respectively hinged buckle plates 95 capable of turning over. The rotating block 92, the two sides of the rotating block 92 are respectively connected with the buckle plate 95 through the connecting rod 96, the bottom of the movable bucket bottom 51 is provided with a buckle hole 10, and the buckle plate 95 is provided with There is a buckle 99 that can be inserted into the buckle hole 10 to fix the movable bucket bottom 51 after the buckle plate 95 is overturned.

As mentioned above, the laser powder sintering molding machine with a liftable barrel bottom is characterized in that a first fixed rod 93 is symmetrically fixed on the rotating block 92, a second fixed rod 94 is fixed on the buckle plate 95, Between the first fixed rod 93 and the second fixed rod 94, there is a connecting rod 96 that can make the buckle plate 95 turn over with the horizontal rotation of the rotating block 92, and the two ends of the connecting rod 96 They are respectively connected to the first fixed rod 93 and the second fixed rod 94 in the form of a spherical pair.

The laser powder sintering molding machine with a liftable barrel bottom as described in claim 2 above, is characterized in that: both sides of the buckle plate 95 are provided with the buckle 99, the connecting beam 911 and the rotating A vertical shaft 11 is inserted in the middle of the block 92 , and the rotating block 92 rotates horizontally around the vertical shaft 11 .

As mentioned above, the laser powder sintering molding machine with a liftable barrel bottom is characterized in that: the rotating block 92 is fixed with a handle 98 that drives the rotating block 92 to rotate horizontally and then drives the fastening plate 95 to rotate vertically.

As mentioned above, the laser powder sintering molding machine with a liftable barrel bottom is characterized in that: the buckle plate 95 is provided with a shrapnel 97 connected with the buckle 99 to facilitate the insertion of the buckle 99 into the buckle hole 10 .

The above-mentioned laser powder sintering molding machine with a liftable barrel bottom is characterized in that: the connecting rod 96 is divided into two sections, and the two sections are connected by a double-ended screw 14 .

As mentioned above, the laser powder sintering molding machine with a liftable barrel bottom is characterized in that: the bottom surface of the first fixing rod 93 cooperates with the top surface of the connecting beam 911 .

As mentioned above, the laser powder sintering molding machine with a liftable barrel bottom is characterized in that: a barrel wall of the forming powder barrel 5 is provided with an escape groove 7 for the connecting frame 91 to pass through.

As mentioned above, the laser powder sintering molding machine with a liftable bucket bottom is characterized in that: the bottom of the molding powder bucket 5 is provided with a long block 13 , and the fastening hole 10 is provided on the long block 13 .

Compared with the prior art, the utility model has the following advantages:

1. The utility model sets a driving device at the bottom of the bucket to drive the bottom of the bucket to rise along the inner wall of the bucket. The driving device includes a support assembly at the bottom of the bucket. Turn the handle to raise the buckle bracket so that the nails can be fastened to the buckle holes at the bottom of the bucket, so that the movable bottom of the bucket is fixedly connected with the support component, and the movable bottom of the bucket is pushed up or pulled down. After processing a powder bucket When it needs to be taken out, it is only necessary to turn the handle counterclockwise to fold and buckle the frame so that it can be separated from the movable bucket bottom and fixed, and the structure is simple and the operation is convenient.

【Description of drawings】

Fig. 1 is a perspective view of the utility model;

Fig. 2 is a schematic diagram of the internal mechanism of the utility model after the frame is removed;

Fig. 3 is an assembly perspective view of the molding powder bucket and the driving device of the utility model;

Fig. 4 is a perspective view of the support assembly when the buckle frame of the present invention is opened into a vertical state;

Fig. 5 is a perspective view of the support assembly of the utility model when the fastening frame is closed.

In the figure: 1 is the frame; 2 is the powder adding device; 3 is the powder scraping platform; 31 is the opening; 4 is the laser generating device; 8 is a drive assembly; 9 is a support assembly; 91 is a connecting frame; 911 is a connecting beam; 912 is a side beam; 92 is a rotating block; 93 is a first fixed rod; 94 is a second fixed rod; 95 is Buckle plate; 96 is connecting rod; 97 is shrapnel; 98 is handle; 99 is buckle; 10 is buckle hole; 11 is vertical axis; 12 is horizontal axis; 13 is long block; 14 is double-ended screw ; 15 is a cavity.

【Detailed ways】

Below in conjunction with accompanying drawing, the utility model will be further described:

A laser powder sintering molding machine with a liftable barrel bottom, comprising a frame 1, a powder adding device 2 is arranged on the frame 1, and a receiving device for receiving the powder adding device is arranged below the powder adding device 2 2. A powder scraping platform 3 for the discharged powder. A cavity 15 is provided below the powder scraping platform 3. A molding powder bucket 5 is arranged inside the cavity 15. The powder adding device 2 and the powder scraping platform 3 There is a powder scraping mechanism 6 for scraping the powder on the powder scraping platform 3 into the molding powder barrel 5 in layers, and the frame 1 is also provided with a powder for sintering the powder in the molding powder barrel 5. Layer laser generator 4, the forming powder barrel 5 is provided with a movable barrel bottom 51, the powder scraping platform 3 is provided with an opening 31, and the powder scraping mechanism 6 scrapes the powder to the movable barrel bottom 51 through the opening 31 The frame 1 is provided with a driving device that drives the movable bucket bottom 51 to slide up and down. The driving device includes a driving assembly 8 and is located at the bottom of the molding powder bucket 5 and is connected to the driving assembly 8. And it is used to push and pull the movable bucket bottom 51 to make the movable bucket bottom 51 lift and lower along the supporting assembly 9 of the bucket inner wall.

The support assembly 9 includes a connection frame 91 connected to the drive assembly 8 and capable of lifting under the drive of the drive assembly 8. The connection frame 91 is provided with side beams 912 and connecting beams connecting the two side beams 912 on both sides. 911, on the two side beams 912 are respectively hinged buckle plates 95 that can be turned over, and on the connecting beam 911, a rotating block 92 that can rotate horizontally is provided, and the two sides of the rotating block 92 are respectively connected by connecting rods 96 and The buckle plate 95 is connected, and the bottom of the movable bucket bottom 51 is provided with a buckle hole 10, and the buckle plate 95 is provided with a buckle hole 10 that can be inserted into the buckle hole 10 after the buckle plate 95 is overturned. Fix the buckle 99 at the bottom of the bucket 51.

Specifically, a long block 13 is provided at the bottom of the molding powder bucket 5 , and the fastening hole 10 is provided on the long block 13 . The lower end of the inner wall of the molding powder bucket 5 is also provided with a limit step that can prevent the movable bucket bottom 51 from sliding out of the bucket, as shown in FIG. 3 .

The fastening plates 95 are respectively arranged on the side beams 912 on both sides, and the fastening nails 99 are provided on both sides of the fastening plates 95 . Specifically, each fastening plate 95 has two fastening nails 99, and there are four in total.

A first fixed rod 93 is symmetrically fixed on the rotating block 92, a second fixed rod 94 is fixed on the buckle plate 95, and a connecting rod is connected between the first fixed rod 93 and the second fixed rod 94. The connecting rod 96 that can make the buckle plate 95 overturn with the horizontal rotation of the rotating block 92, the two ends of the connecting rod 96 are respectively connected with the first fixed rod 93 and the second fixed rod in the form of a spherical pair. 94 connections.

A vertical shaft 11 is inserted between the connecting beam 911 and the rotating block 92, and the rotating block 92 rotates horizontally around the vertical shaft 11 in the middle, and the two ends of the fastening plate 95 are hinged to the On the side beam 912, the fastening plate 95 rotates vertically around the horizontal axis 12 at both ends.

The rotating block 92 is fixed with a handle 98 that drives the rotating block 92 to rotate horizontally and then drives the fastening plate 95 to rotate vertically. Specifically, turning the handle 98 clockwise closes the fastening plate 95 , and turning the handle 98 counterclockwise opens the fastening plate 95 so that the fastening nail 99 is inserted into the fastening hole 10 .

The fastening plate 95 is provided with an elastic piece 97 connected with the fastening nail 99 to facilitate insertion of the fastening nail 99 into the fastening hole 10 . The elastic piece 97 enables the buckle 99 to swing slightly so as to be inserted into the fastening hole 10 more conveniently.

The connecting rod 96 is divided into two sections, and the two sections are connected by a double-ended screw 14 so that the length of the connecting rod 96 is adjustable.

The bottom surface of the first fixing rod 93 fits with the top surface of the connecting beam 911 . When the fastening plate 95 is rotated to the vertical direction, the bottom surface of the first fixing rod 93 just pushes against the top surface of the connecting beam 911 , and the friction force between the two is relatively large, which acts to lock the fastening plate 95 .

A barrel wall of the molding powder barrel 5 is provided with an escape groove 7 for the connecting frame 91 to pass through. That is, the space-avoiding groove 7 below the movable barrel bottom 51 is passed through by the connecting frame 91 to hold up the movable barrel bottom 51, and the space-avoiding groove 7 above the movable barrel bottom 51 is sucked on the barrel wall with a steel strip and sealed by a magnet so that Prevent the powder on the bottom of the bucket 51 from leaking out, and the bottom of the bucket 51 will tear the steel band held by the magnet below it from the bucket wall for the connecting frame 91 to pass through when the bottom of the bucket 51 rises.

The driving assembly 8 includes a servo motor, the output shaft of the servo motor is connected with a reduction gear set, the reduction gear set is connected with a screw, and the screw is fitted with a nut; the support assembly 9 is connected with the nut 16 . When the utility model started working, the bottom 51 of the movable bucket rose to the top of the forming powder bucket 5. The powder raw material leaks from the powder adding device 2 onto the powder scraping platform 3, and the powder scraping mechanism 6 starts to work, and scrapes the powder raw material onto the movable bucket bottom 51. When the powder raw material is thick, under the control of the control system, the laser generator 4 is controlled to scan the surface of the powder raw material on the movable barrel bottom 51, and the thin layer in the scanned area is sintered and solidified to form a thin layer of the part. After scanning After the first layer, the servo motor drives the screw to rotate through the reduction gear set, so the nut matched with the screw moves downward, the support assembly 9 descends with the nut, and the movable barrel bottom 51 moves down with the support assembly 9 for a distance of one layer thickness , and then apply a new layer of powder raw material on the surface of the cured thin layer, and carry out the scanning process of the next layer, and so on, until the entire prototype is manufactured,

The utility model has been described in detail above in conjunction with the embodiments of the accompanying drawings, and those skilled in the art can make various changes to the utility model according to the above description. Therefore, some details in the embodiments should not constitute a limitation to the utility model, and the utility model shall take the scope defined by the appended claims as the protection scope of the utility model.

Claims (10)

1. one kind has the laser powder sinter molding machine at the bottom of liftable bucket, include frame (1), described frame (1) is provided with powder adding device (2), the below of described powder adding device (2) be provided with receive powder that described powder adding device (2) discharges scrape powder platform (3), described below of scraping powder platform (3) is provided with shaping powder bucket (5), described powder adding device (2) and described scrape to be provided with between powder platform (3) described powder layering of scraping on powder platform (3) is scraped to the Gua Fen mechanism (6) in described shaping powder bucket (5), described frame (1) is also provided with the generating device of laser (4) for sintering the interior bisque of described shaping powder bucket (5), (51) at the bottom of movable bucket are provided with in described shaping powder bucket (5), it is characterized in that: described frame (1) is provided with and drives the drive unit that at the bottom of described movable bucket, (51) slide up and down, described drive unit comprises driven unit (8) and is located at described shaping powder bucket (5) bottom and is connected with described driven unit (8) and makes for (51) at the bottom of bucket movable described in push-and-pull the bearing assembly (9) that at the bottom of movable bucket, (51) are elevated along bucket inwall.

2. there is laser powder sinter molding machine at the bottom of liftable bucket according to claim 1, it is characterized in that: described bearing assembly (9) comprises and being connected and the link (91) that can be elevated under driven unit (8) drives with described driven unit (8), the upper both sides of described link (91) are provided with curb girder (912) and the tie-beam (911) being connected two curb girders (912), two curb girders (912) are hinged with the snapping plate (95) that can overturn respectively, described tie-beam (911) is provided with the moving block (92) that can horizontally rotate, the both sides of described moving block (92) are connected with described snapping plate (95) respectively by connecting rod (96), at the bottom of described movable bucket, the bottom of (51) is provided with snapping hole (10), described snapping plate (95) is provided with the clasp nail (99) that can insert described snapping hole (10) (51) at the bottom of with fixing described movable bucket after described snapping plate (95) upset.

3. there is laser powder sinter molding machine at the bottom of liftable bucket according to claim 2, it is characterized in that: on described moving block (92), be symmetrically fixed with the first fixed bar (93), described snapping plate (95) is fixed with the second fixed bar (94), be connected with between described first fixed bar (93) and described second fixed bar (94) can make described snapping plate (95) with described moving block (92) horizontally rotate and the connecting rod (96) that overturns, described connecting rod (96) two ends with the mode of spherical pair respectively with described first fixed bar (93), second fixed bar (94) connects.

4. there is laser powder sinter molding machine at the bottom of liftable bucket according to claim 2, it is characterized in that: the both sides of described snapping plate (95) are equipped with described clasp nail (99), the centre of described tie-beam (911) and described moving block (92) is inserted with vertical axis (11), described moving block (92) horizontally rotates around described vertical axis (11), and the two ends of described snapping plate (95) are articulated with on described curb girder (912) by trunnion axis (12).

5. there is laser powder sinter molding machine at the bottom of liftable bucket according to claim 2, it is characterized in that: described moving block (92) is fixed with and drives described moving block (92) to horizontally rotate and then drive the vertical handle (98) rotated of described snapping plate (95).

6. there is laser powder sinter molding machine at the bottom of liftable bucket according to claim 2, it is characterized in that: described snapping plate (95) is provided with and is connected with described clasp nail (99) to facilitate clasp nail (99) to insert shell fragment (97) in snapping hole (10).

7. the laser powder sinter molding machine had at the bottom of liftable bucket according to claim 3, is characterized in that: described connecting rod (96) is divided into two sections, is connected between two sections by double threaded screw (14).

8. there is laser powder sinter molding machine at the bottom of liftable bucket according to claim 3, it is characterized in that: the bottom surface of described first fixed bar (93) coordinates with the end face of described tie-beam (911).

9. there is laser powder sinter molding machine at the bottom of liftable bucket according to claim 2, it is characterized in that: one barrel of wall of described shaping powder bucket (5) is provided with the avoiding hollow groove (7) passed for described link (91).

10. there is laser powder sinter molding machine at the bottom of liftable bucket according to claim 2, it is characterized in that: described shaping powder bucket (5) bottom is provided with long strip block (13), and described snapping hole (10) is located in described long strip block (13).