CN111976139A - Multifunctional quantitative powder supply and spreading device - Google Patents

Abstract

The invention belongs to the technical field of additive manufacturing, and in particular relates to a multifunctional quantitative powder supply and quantitative powder spreading device, comprising a worktable, a molding bin, two powder supply devices, a powder spreading device and a driving device, and the worktable is a hollow cuboid structure , the powder spreading device, the driving device and the powder supply device are all placed in the worktable, and the side wall of the worktable is provided with an operation window; the forming bin is set under the platform, and the powder supply bin one and the powder supply bin two are set on the left and right sides above the platform. A powder spreading device is set up, which is connected to the driving device. This device can realize quantitative powder spreading and powder supply twice in a single cycle, saving time, avoiding empty strokes, improving work efficiency in the printing process, and the control mechanism is simple and compact. , easy to operate.

Description

A multifunctional quantitative powder feeding and quantitative powder spreading device

technical field

The invention belongs to the technical field of additive manufacturing, and in particular relates to a multifunctional quantitative powder supply and quantitative powder spreading device.

Background technique

Based on the process characteristics of layer-by-layer molding in additive manufacturing, before each laser scanning process, a new layer of powder needs to be re-applied for melting and molding. After completion, the excess powder is removed, and the parts are polished and dried to complete the entire Processing and manufacturing of parts; for large-scale additive manufacturing equipment with a large molding area, the required powder-spreading scraper structure has a large span and a long stroke, which requires higher requirements for the working efficiency of the scraper device. Within one cycle of the powder-spreading device Spreading and scraping powder for a single time is easy to cause empty strokes and low work efficiency; with the development of science, technology and society, a single powder spreading material can no longer meet the work efficiency in the field of additive manufacturing.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the present invention provides a multifunctional quantitative powder supply and quantitative powder spreading device, which can realize twice quantitative powder coating and powder supply in a single cycle, save time, avoid empty strokes, and improve work efficiency during the printing process. , and the control mechanism is simple and compact, and the operation is convenient.

In order to achieve the above object, the present invention adopts the following technical solutions:

A multifunctional quantitative powder feeding and quantitative powder spreading device includes a workbench, a forming bin, two powder feeding devices, a powder coating device and a driving device; the workbench is a hollow cuboid structure, and the powder coating device, the driving device and the driving device The powder devices are all placed in the workbench, the side wall of the workbench is provided with an operation window, and the forming platform of the workbench can be raised and lowered in the forming channel; a forming bin is arranged under the forming platform, and the two sides of the forming bin are provided with powder collecting Bin 1 and powder collecting bin 2, the forming bin can be raised and lowered in the forming channel; the powder supply bin 1 and the powder feeding bin 2 are located on the left and right sides above the forming platform, which are fixed on the left and right sides of the worktable, and are respectively located inside the powder feeding bin. The powder supply roller 1 and the powder supply roller 2 are set up, and evenly distributed semicircular grooves are arranged on the powder supply roller; the powder spreading device is arranged on the platform, which adopts a mesh-shaped structure;

The powder spreading device includes two powder collecting bins, a roller scraper, two powder feeding rollers, a connecting table and three motors; powder collecting bins three and four are arranged on both sides of the powder spreading device. There is a powder collecting groove at the top, and the inner lower surface of the third and fourth collecting chambers is provided with grooves for storing the powder discharging roller and the roller scraper. There is a connecting table between the four powder collecting bins. A roller scraper and a fixed plate are installed under the connecting table. The roller scraper is equipped with a corresponding motor three. There are six threaded holes on the fixed plate. There are four threaded holes and three cylindrical pins on both sides of the powder collecting bin;

The driving device includes a connecting frame, a sliding plate, a guide rail and a screw rod; one end of the connecting frame is connected with the connecting table, the other end is connected with the sliding plate through four threaded holes, and the sliding plate and the screw rod are connected by threaded fitting, And in cooperation with the guide rail, the screw rod is fixed on the base plates on both sides, and the screw rod is driven to rotate by the motor.

The motor is fixed by four ear seats, the motor sleeve and the motor shaft are connected by splines, the motor reverse buckle and the motor shaft are connected by threads, and the three motors respectively drive two powder discharge rollers and a roller scraper to rotate. .

There is an induction device in the powder collecting bin. The shape of the powder collecting bin is provided with a slope, and the upper surface of the powder collecting bin is provided with a groove. The powder chute, the width of the powder chute is as large as the width of each groove on the powder output roller.

The powder output roller is cylindrical, with uniform grooves on it. Assuming that the cross-sectional area of the groove is S, the length is h, the volume is V, and the number is a, the formula for calculating the powder output for one rotation of the roller for

Compared with the prior art, the present invention has the following beneficial effects: (1) both the powder supplying bin and the powder collecting bin are designed with powder output rollers, which can achieve the effect of powder spreading while discharging powder during the powder spreading process; (2) ) There are powder supply bins on the left and right sides, which is convenient for powder supply. Powder can be added on both sides, and there is no need to add powder to the designated side. It can realize quantitative powder spreading and powder supply twice in a single cycle, saving time and avoiding empty strokes; (3) Double-laying of different powders can be realized, improving work efficiency during the printing process, and the control mechanism is simple and compact, and the operation is convenient; (4) The powder layer is always uniform in thickness and thickness, which improves the quality of powder spreading.

Description of drawings

1 is a schematic diagram of the structure of the device of the present invention;

Fig. 2 is the structure schematic diagram of powder spreading device;

Fig. 3 is the concrete structure and partial enlarged view of the powder silo;

Figure 4 is a schematic diagram of the motor structure;

1. Powder supply bin one; 2. Powder supply bin two; 3. Connecting table; 4. Powder spreading device; 5. Connecting frame; 6. Sliding plate; ;10, screw; 11, powder collecting bin 2; 12, powder output roller 1; 13, powder collecting bin 3; 14, powder collecting groove; 15, powder output roller reverse buckle; 16, belt; 17, Motor reversal buckle; 18, motor one; 19, motor two; 20, belt; 21, powder bin four; 22, powder roller two; 23, fixed plate; 24, roller scraper; 25, motor three; 26. Powder supply roller one; 27. Powder supply roller two; 28. Motor sleeve; 29. Motor ear seat; 30. Motor shaft.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

The present invention realizes the double-spreading device for the same powder, and also can realize the double-spreading for different powders. Since the current technology is only for one kind of powder, the fusion of the two powders will cause unexpected results.

As shown in Figure 1, a multi-functional quantitative powder supply and quantitative powder spreading device includes a worktable, a forming bin 9, a powder supply bin 1, a powder supply bin 2 2, a powder spreading device 4 and a driving device, and the workbench is a hollow cuboid Structure, the powder spreading device, the driving device and the powder supply device are all placed in the workbench, the side wall of the workbench is provided with an operation window, and the forming platform of the workbench can be raised and lowered in the forming channel; Powder collecting bin 1 8 and powder collecting bin 2 11 are arranged on both sides of molding bin 9; powder supply device includes powder feeding bin and powder feeding roller, powder feeding bin 1 and powder feeding bin 2 are arranged above forming platform, and the powder feeding bin 1 and powder feeding bin 2 are fixed on the table. On the left and right sides, powder supply roller 1 26 and powder supply roller 2 27 are respectively set inside the powder supply bin. The powder supply roller is driven by the motor to rotate to achieve the effect of powder output. By controlling the speed of the motor and the radius of the semicircular groove evenly distributed on the powder supply roller, the purpose of precise powder output is achieved.

A powder spreading device 4 is installed on the platform. The powder spreading device 4 includes a connecting table 3, a powder output roller 12, a powder collecting bin, a powder collecting groove 14, a powder output roller reverse buckle 15, a belt, a motor, and a powder output roller. 22. The fixing plate 23 and the roller scraper 24, the powder collecting bin 3 13 and the powder collecting bin 4 21 are arranged on both sides of the powder spreading device, and the powder collecting bin is set at the top of the powder collecting bin. The inner lower surface is provided with a groove for storing the powder output roller and the roller scraper, the powder output roller 1 12 and the powder output roller 2 22 are installed, and the connection table 3 is set between the powder collecting bin 3 13 and the powder collecting bin 4 21. A roller scraper 24 and a fixing plate 23 are installed under the connection table. The roller scraper 24 is provided with a corresponding motor 3 25. The powder discharge roller and the roller scraper 24 are fixed by the fixing plate 23. There are six threaded holes on the fixing plate. , Change the pressure by adjusting the tightness of the nut, so that the roller is horizontal, the powder collecting bin is tangent to the powder discharging roller, and there are four threaded holes and three cylindrical pins on both sides of the powder collecting bin. There is a slope on the powder collecting bin, in order to make the powder better concentrate on the powder discharging roller, so that the stability of the powder collecting bin is better; The reversing buckle of the powder output roller is equipped with a corresponding motor, and the reverse buckle of the powder output roller and the motor are connected by a belt; the powder spreading device adopts a mesh-shaped structure as a whole, which can slide back and forth in a straight line, and the powder spreading is flexible and convenient. storage of motors and stationary motors;

There is an induction device in the powder collecting bin. Once the powder is lower than the set height, the sensing device will be transmitted to the control brain, and finally the powder supply bin will be controlled to supply powder. The function of the powder collecting bin is to store some powder. After the powder is spread, the powder is added.

There is a groove on the upper surface of the powder collecting bin and the width of the groove on the lower surface of the powder feeding bin is narrow at the top and wide at the bottom, which is more conducive to the transfer of powder.

There is a powder outlet groove directly below the powder outlet roller. The width of the powder outlet channel is as large as the width of each groove on the powder outlet roller, so that the powder outlet roller is easier to control when the powder is ejected, and it is convenient for accurate calculation. .

The powder output roller is cylindrical, with a uniform groove on it. The cross-sectional area of the groove is S, the length is h, the volume is V, and the number is a. The formula for calculating the powder output for one rotation of the roller is:

During the powder spreading process, the powder output amount can be changed by adjusting the rotation speed of the powder output roller to achieve quantitative powder spreading.

The powder spreading device can realize two-way powder spreading, and the powder can be laid twice in one cycle.

The driving device includes a connecting frame 5, a sliding plate 6, a guide rail 7 and a screw rod 10. One end of the connecting frame 5 is connected with the connecting table 3, and the other end is connected with the sliding plate 6 through four threaded holes. It is connected with the guide rail 7, the screw rod is fixed on the base plate on both sides, and the screw rod is driven to rotate by the motor to realize the left and right linear movement of the powder spreading device.

The specific structure of the motor is shown in Figure 4. The motor is fixed by four ear seats 30, the motor sleeve 28 and the motor shaft 31 are connected by splines, and the motor reverse buckle 29 and the motor shaft 31 are connected by threads.

In this embodiment, the workbench is not limited to a traditional open platform. The preferred workbench in this example is a work cabin. The specific structure of the work cabin is not limited to a cuboid structure, and the structure of the work cabin can be changed according to the actual situation; There is a forming bin, and the forming bin can be lifted and lowered in the forming channel. The specific lifting form can be realized by a linear motor, a hydraulic cylinder or other structures.

The present invention can also realize the single-spreading process of two powders with another function, which is aimed at the processing of some parts with special structures.

The above embodiments are only the preferred technical solutions of the present invention, and are not limited to the applications listed in the description and the embodiments. They can be fully applied to various fields suitable for the present invention. For those skilled in the art, they can easily The invention is not limited to the specific details and illustrations of the description, without departing from the general concept defined by the claims and the scope of equivalents, without departing from the general concept defined by the claims and the scope of equivalents.

Claims (6)

1. A multifunctional quantitative powder supply and spreading device comprises a workbench, a forming bin, a powder supply device, a powder spreading device and a driving device, and is characterized in that the workbench is of a hollow cuboid structure, the powder spreading device, the driving device and the powder supply device are all arranged in the workbench, an operation window is arranged on the side wall of the workbench, and a forming platform of the workbench is arranged in a forming channel in a lifting manner; a molding bin is arranged below the molding platform, a powder collecting bin I and a powder collecting bin II are arranged on two sides of the molding bin, and the molding bin is arranged in the molding channel in a lifting manner; a powder supply bin I and a powder supply bin II are arranged on the left side and the right side above the forming platform, a powder supply roller I and a powder supply roller II are respectively arranged in the powder supply bin, and semicircular grooves which are uniformly distributed are formed in the powder supply rollers; a powder spreading device is arranged on the platform and adopts a structure in a shape like a Chinese character mu;

the powder spreading device comprises two powder collecting bins, a roller scraper, two powder feeding rollers, a connecting table and three motors; the powder spreading device is provided with a powder collecting bin III and a powder collecting bin IV on two sides, the top end of the powder collecting bin is provided with a powder collecting groove, the lower surfaces of the inner parts of the powder collecting bin III and the powder collecting bin IV are provided with grooves for storing a powder discharging roller and a roller scraper, a powder discharging roller I and a powder discharging roller II are installed, a connecting table is arranged between the powder collecting bin III and the powder collecting bin IV, the roller scraper and a fixed plate are installed below the connecting table, the roller scraper is provided with a corresponding motor III, six threaded holes are formed in the fixed plate, the powder collecting bin is tangent to the powder discharging roller, and the two sides of the powder collecting bin are respectively provided with four threaded holes and three cylindrical pins;

the driving device comprises a connecting frame, a sliding plate, a guide rail and a screw rod; one end of the connecting frame is connected with the connecting table, the other end of the connecting frame is connected with the sliding plate through four threaded holes, the sliding plate is connected with the screw rod through threaded fit and matched with the guide rail, the screw rod is fixed on the base plates on the two sides, and the screw rod is driven to rotate through a motor;

the motor is fixed through four ear seats, and motor sleeve and motor shaft link to each other through the spline, and the motor is reverse to be detained and the motor shaft is connected through the screw thread, and three motor drives two powder rollers and a roller scraper rotation respectively.

2. The multifunctional quantitative powder supply and supply device as claimed in claim 1, wherein the powder spreading device is of a mesh-shaped structure as a whole.

3. The multifunctional quantitative powder supply and spreading device as claimed in claim 1, wherein the powder collection bin is provided with an inclined surface on the outer shape and an induction device inside.

4. The multifunctional quantitative powder supply and spreading device as claimed in claim 1, wherein the upper surface of the powder collection bin is provided with a groove, and the width of the groove on the lower surface of the powder supply bin is narrow at the top and wide at the bottom.

5. The multifunctional quantitative powder supply and spreading device as claimed in claim 1, wherein the powder outlet roller is cylindrical and has uniform grooves formed thereon.

6. The multifunctional quantitative powder supply and spreading device as claimed in claim 1, wherein a powder outlet groove is formed right below the powder outlet roller, and the width of the powder outlet groove is as large as the width of each groove on the powder outlet roller.

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