CN201157903Y - Novel laser powder sintering rapid prototyping machine - Google Patents

Abstract

The utility model discloses a novel laser powder sintering rapid prototyping machine, its characterized in that: comprises a frame and a control system; the powder feeding device is arranged below the powder feeding device, a powder scraping platform for scraping powder is arranged below the powder scraping device, an opening is arranged on the powder scraping platform, a cavity is arranged below the opening, a forming barrel is arranged in the cavity, and a movable barrel bottom capable of sliding up and down along the barrel wall of the forming barrel is arranged in the forming barrel; and the device also comprises a driving device which can drive the movable barrel bottom to slide up and down. The utility model has the advantages of easy processing, good stability and convenient cleaning of the forming barrel.

Description

New laser powder sintering rapid prototyping machine

[technical field]

The utility model relates to a novel laser powder sintering rapid prototyping machine.

[Background technique]

Laser rapid prototyping (Laser Rapid Prototyping: LRP) is a new manufacturing technology based on discrete/stacking principles, using computer technology, laser technology, automatic control, polymer technology, etc. to manufacture. The computer first inputs the three-dimensional part data designed by the CAD/CAM software into the program of the machine tool, and the computer controls the laser beam to scan the powder raw materials step by step, and the scanned area is sintered and solidified, and a three-dimensional entity designed by the CAD/CAM software is gradually obtained. Model-like prototype parts.

The applicant submitted six patents to the National Patent Office on February 3, 2008, titled respectively: "Laser powder sintering rapid prototyping machine with powder added to the upper part", "Quantitative powder adding device for laser powder sintering rapid prototyping machine", "A Laser Powder Sintering Rapid Prototyping Machine with Preheating Function", "A Laser Powder Sintering Rapid Prototyping Machine with Constant Temperature Function", "New Laser Powder Sintering Rapid Prototyping Machine", "Laser Powder Sintering Rapid Prototyping Machine", The utility model is one of them, and mainly solves the problems of high processing difficulty, poor stability and difficult cleaning of forming barrels in existing laser powder sintering forming machines.

[utility model content]

The purpose of the utility model is to overcome the deficiencies of the above-mentioned technologies and provide a novel laser powder sintering rapid prototyping machine with easy processing, good stability and convenient cleaning of the forming barrel.

In order to achieve the above object, the utility model adopts the following technical solutions:

The new type of laser powder sintering rapid prototyping machine is characterized in that: it includes a frame and a control system; a laser generating device and a powder adding device are arranged on the frame, a powder scraping device is arranged under the powder adding device, and a powder scraping device is installed under the powder scraping device. A powder scraping platform for powder scraping, with an opening on the powder scraping platform, a cavity below the opening, a molding barrel inside the cavity, and a movable barrel bottom that can slide up and down along the barrel wall; it also includes There is a driving device that can drive the bottom of the movable bucket to slide up and down.

The novel laser powder sintering rapid prototyping machine described above is characterized in that a mounting base is provided at the bottom of the cavity, and the driving device includes a servo motor mounted on the mounting base, and the servo motor is connected to a A support assembly that can support the movable bucket bottom and drive it to slide up and down; the lower end of the inner wall of the formed bucket is provided with a limit step that can prevent the movable bucket bottom from sliding out of the bucket.

According to the new laser powder sintering rapid prototyping machine described above, it is characterized in that the transmission assembly includes a screw rod arranged on the mounting base, a gear set connected between the servo motor and the screw rod to drive the screw rod to rotate, and a set A nut matched with it on the screw rod; the support assembly is sleeved above the nut on the screw rod.

The novel laser powder sintering rapid prototyping machine described above is characterized in that the mounting seat is provided with a guide post parallel to the screw, and both the screw and the guide post are located on one side of the molding barrel; the support assembly includes There is a guide seat that is sheathed on the guide column and the screw rod and can slide along it; the side wall of the forming barrel is provided with a guide groove that runs through the inside and outside of the barrel, and the support assembly also includes a guide seat that is connected as a whole and wears The connecting part passes through the guide groove and can slide up and down in the groove, and the connecting part is connected with a supporting frame, and the supporting frame is provided with supporting feet that can support the bottom of the movable bucket.

According to the new laser powder sintering rapid prototyping machine described above, it is characterized in that a mounting frame is fixedly connected to the lower side of the powder scraping platform, and a card table is provided on the mounting frame, and buckles are provided on both symmetrical sides of the forming barrel. plate, the buckle plate is buckled on the card table, and the forming barrel and the installation frame are buckled together.

The beneficial effects of the utility model are:

1. The computer first slices the three-dimensional part entity designed by CAD/CAM software into layers to obtain the data of each layer section, and inputs it into the control system of the present invention. By setting the bottom of the bucket that can slide up and down, the laser generating device scans After a layer of powder material is finished, under the control of the servo motor, the bottom of the movable barrel moves down a distance of one layer thickness, and then a new layer of powder material is scraped on the surface of the cured thin layer by the powder scraping device to carry out the next layer. Scanning and processing are repeated until the entire prototype is manufactured. It has the advantages of good stability and high precision;

2. By buckling the forming barrel on the mounting frame, when a forming barrel is processed, it can be removed and replaced immediately, and the continuous processing does not need to wait for the cooling of the powder principle, so the efficiency is high;

[Description of drawings]

Below in conjunction with accompanying drawing and embodiment of the present utility model, further describe in detail:

Fig. 1 is the three-dimensional schematic view of the utility model;

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

Fig. 3 is the exploded schematic view of the utility model installation frame, forming barrel;

Fig. 4 is the assembling schematic diagram of mounting frame, forming barrel and driving device of the utility model;

Fig. 5 is an exploded schematic view of the molding barrel and the driving device of the utility model;

Fig. 6 is a schematic diagram of the lifting principle of the movable bottom of the utility model;

[Detailed ways]

As shown in Figures 1 and 2, the new laser powder sintering rapid prototyping machine includes a frame 1 and a control system (not shown); A powder scraping device 4 is provided below the device 3, and a powder scraping platform 5 for powder scraping is provided below the powder scraping device 4. An opening 50 is provided on the powder scraping platform 5, and a cavity 6 is provided below the opening 50. Inside the cavity 6 Be provided with forming bucket 7, be provided with the movable bucket bottom 8 that can slide up and down along its barrel wall in the molding bucket 7; Also comprise the driving device 9 (as shown in Figure 4) that can drive movable bucket bottom 8 to slide up and down.

As shown in Fig. 2, Fig. 4 and Fig. 5, a mount 10 is provided at the bottom of the cavity 6, and the drive device 9 includes a servo motor 11 disposed on the mount 10, and the servo motor 11 is connected to the motor through a transmission assembly 12. The support assembly 13 that can support the movable bucket bottom 8 and drive it to slide up and down; the lower end of the inner wall of the forming bucket 7 is provided with a limit step 71 that can prevent the movable bucket bottom 8 from sliding out of the bucket (as shown in Figure 4 and Figure 5) .

As shown in Figure 5, the transmission assembly 12 includes a screw rod 14 arranged on the mounting base 10, a gear set 15 connected between the servo motor 11 and the screw rod 14 to drive the screw rod 14 to rotate, and a gear set 15 arranged on the screw rod 14 to communicate with it. A matching nut 16 ; the support assembly 13 is sleeved above the nut 16 on the screw rod 14 .

As shown in Figures 4 and 5, the mounting base 10 is provided with a guide post 17 parallel to the screw rod 14, and the screw rod 14 and the guide post 17 are located on one side of the forming barrel 7; On the guide column 17 and the screw rod 14 and the guide seat 18 that can slide along it, a guide sleeve 23 is provided in the guide seat 18, and the lower end of the guide sleeve 23 leans against the above-mentioned nut 16; the side wall of the forming barrel 7 is provided with a through The inner and outer guide grooves 72, the support assembly 13 also include a connecting part 19 that is connected with the guide seat 18 as a whole, passes through the guide groove 72 and can slide up and down in the groove, the connecting part 19 is connected with a support frame 20, and the support frame 20 is provided with the supporting foot 21 that can support described movable bucket bottom 8.

As shown in Fig. 2 and Fig. 3, the lower side of the powder scraping platform 5 is fixedly connected with a mounting frame 22 by bolts, and the mounting frame 22 is provided with a card platform 220, and the symmetrical sides of the above-mentioned molding barrel 7 are provided with buckle plates 73, and the buckle The board 220 is buckled on the card table 73, and the forming barrel 7 and the installation frame 22 are buckled together.

Shown in Fig. 5 with reference to, when the utility model started working, movable bucket bottom 8 rose to the topmost end of forming bucket 7. The powder raw material leaks from the powder adding device 3 onto the powder scraping platform 5, the powder scraping device 4 starts to work, and scrapes the powder raw material onto the movable bucket bottom 8, when the powder scraping device 4 scrapes the required amount on the movable bucket bottom 8 When the powder raw material is thick, under the control of the control system, the laser generator 2 is controlled to scan the surface of the powder raw material on the movable barrel bottom 7, and the thin layer of the scanned area is sintered and solidified to form a thin layer of the part. After scanning After the first layer, the servo motor 11 drives the screw 14 to rotate through the gear set 15, so the nut 16 matched with the screw 14 moves downward, the support assembly 13 descends with the nut 16, and the movable barrel bottom 8 moves downward with the support assembly 13 A distance of one layer thickness, and then apply a new layer of powder material on the surface of the cured thin layer, and scan the next layer, and so on, until the entire prototype is manufactured, and a CAD/CAM software design is obtained. The same prototype as the three-dimensional solid model has the advantages of good stability and high precision; when the movable barrel bottom 8 is located at the bottom of the barrel, the movable barrel bottom 8 can be lifted to the upper end of the forming barrel 7 only by reversely starting the servo motor. When a forming barrel 7 is processed, it can be taken out from the clamping table 220 of the installation frame 22 and then changed to another processing immediately, without waiting for the cooling of the powder principle, and the efficiency is high.

Claims (5)

1, the powder sintered rapidform machine of new pattern laser is characterized in that: include frame (1), control system; On frame (1), be provided with generating device of laser (2), powder adding device (3), powder adding device (3) below is provided with powder-scraping device (4), powder-scraping device (4) below is provided with for what it scraped powder and scrapes powder platform (5), scrape powder platform (5) and be provided with an opening (50), opening (50) below is provided with a cavity (6), be provided with moulding bucket (7) in the cavity (6), being provided with in the moulding bucket (7) can be along the movable bucket end (8) that its barrel wall slides up and down; Also include and to order about the drive unit (9) that the movable bucket end (8) slides up and down.

2, the powder sintered rapidform machine of new pattern laser according to claim 1, it is characterized in that described cavity (6) bottom is provided with a mount pad (10), described drive unit (9) includes the servomotor of being located on the mount pad (10) (11), and servomotor (11) is connected with by transmission component (12) and can supports the described movable bucket end (8) and order about its bearing assembly that slides up and down (13); Described moulding bucket (7) inwall lower end is provided with and can prevents that the described movable bucket end (8) from skidding off the outer limited step (71) of bucket.

3, the powder sintered rapidform machine of new pattern laser according to claim 2 is characterized in that described transmission component (12) includes the screw rod (14) be located on the mount pad (10), is connected the gear train (15) that can drive screw rod (14) between described servomotor (11) and the screw rod (14) and rotate, is arranged on the screw rod (14) nut engaged (16) with it; Described bearing assembly (13) is set on the top of the above nut of screw rod (14) (16).

4, the powder sintered rapidform machine of new pattern laser according to claim 2 is characterized in that described mount pad (10) is provided with the lead (17) parallel with screw rod (14), and screw rod (14) all is positioned at described moulding bucket (7) one sides with lead (17); Described bearing assembly (13) includes and is set on that lead (17) and screw rod (14) are gone up and can be along the guide holder (18) of its slip; The sidewall of described moulding bucket (7) is provided with and connects its inside and outside gathering sill (72), described bearing assembly (13) also includes the connecting portion (19) that connects as one, passes gathering sill (72) and can slide up and down with guide holder (18) in groove, connecting portion (19) is connected with a bearing support (20), and bearing support (20) is provided with the leg (21) that can hold the described movable bucket end (8).

5, the powder sintered rapidform machine of new pattern laser according to claim 1, it is characterized in that described powder platform (5) downside of scraping is fixedly connected with an installing rack (22), installing rack (22) is provided with Ka Tai (220), the both sides of described moulding bucket (7) symmetry are provided with buckle (73), buckle (220) is buckled on the Ka Tai (73), and moulding bucket (7) and installing rack (22) are snapped together.

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