CN219093640U

CN219093640U - Rotary platform for laser selective melting equipment

Info

Publication number: CN219093640U
Application number: CN202320193384.8U
Authority: CN
Inventors: 安然; 马腾; 李波
Original assignee: Avic Maite Additive Technology Beijing Co ltd
Current assignee: Avic Maite Additive Technology Beijing Co ltd
Priority date: 2023-02-13
Filing date: 2023-02-13
Publication date: 2023-05-30
Anticipated expiration: 2033-02-13

Abstract

The utility model discloses a rotary platform for laser selective melting equipment, which relates to the technical field of laser printing and comprises a base, a nut fixing seat, a motor fixing seat and a high-precision rotary encoder, wherein a light source is arranged at the upper end of the base through a connecting frame, the high-precision rotary encoder and the motor fixing seat are both arranged on the inner side of the base in a sliding mode, one side of the motor fixing seat is fixedly connected with a servo motor through a bolt, one end of the nut fixing seat is fixedly connected with the base, one side of the nut fixing seat is fixedly connected with a nut, a ball screw is arranged in the nut, the output end of the servo motor is driven by the ball screw through a driving mechanism, and the upper end of the ball screw is fixedly connected with a printing substrate. According to the utility model, the printing substrate rotates and moves up and down along with the ball screw by rotating the ball screw, so that the rotation transmission, the up and down transmission and the selective laser automatic matching are realized, and the stress of the formed part is dispersed.

Description

Rotary platform for laser selective melting equipment

Technical Field

The utility model relates to the technical field of 3D printing, in particular to a rotary platform for laser selective melting equipment.

Background

Laser selective melting is the most important ring in 3D printing, metal powder is spread on the plane of a substrate, and the powder on the substrate is melted by selective laser beams. The working principle of laser selective melting is that the designed three-dimensional model is subjected to slicing dispersion and scanning path planning, so that slicing contour information capable of controlling laser beam scanning is obtained. Subsequently, the computer is used for entering slice contour information layer by layer, and laser beams are controlled by a scanning galvanometer to selectively melt the metal powder and stack the metal powder layer by layer into the same three-dimensional entity as the model.

The utility model provides a but be through retrieving the publication number CN209830270U, but be disclosed heat-proof work platform for district's laser melting equipment, belong to laser district's melting forming technical field, including the installation base and locate the powder jar on the installation base, the inside of powder jar is equipped with heating element, the inside of powder jar is located heating element's lower extreme and is equipped with thermal-insulated supporting component, thermal-insulated supporting component comprises heat insulating board and bottom plate, heat insulating board and bottom plate horizontal installation are in the inside of powder jar, and the lower terminal surface of heat insulating board is connected with the up end of bottom plate, the up end of heat insulating board is connected with heating element's lower terminal surface, the top of installation base is equipped with thermal-insulated subassembly on the outer wall of powder jar, thermal-insulated subassembly includes heat insulating ring and insulating sleeve, the utility model discloses simple structure through setting up multiple thermal-insulated route, can effectually guarantee the safety in utilization of its electrical equipment in the course of working of the utility model, the machining efficiency and processingquality have been improved.

In the laser selective melting forming process, the problem of stress concentration can occur in the printing process because the printed part is controlled at a fixed position, and the forming condition is limited at a certain point. To this end we propose a rotary platform for a laser selective melting apparatus to address the problems encountered in the above.

Disclosure of Invention

It is an object of the present utility model to provide a new solution for a rotating platform for a laser selective melting apparatus.

According to a first aspect of the utility model, a rotary platform for laser selective melting equipment is provided, and the rotary platform comprises a base, a motor fixing seat and a high-precision rotary encoder, wherein the motor fixing seat is in sliding fit with the base, a servo motor is arranged on the motor fixing seat, a nut is fixedly arranged on the base, a ball screw is inserted into the nut, and the ball screw is in threaded fit with the nut; the output end of the servo motor is driven by a driving mechanism and a ball screw; the high-precision rotary encoder is sleeved on the ball screw and used for acquiring rotation parameters of the ball screw; the upper end of the ball screw is fixedly connected with a printing substrate, the periphery of the printing substrate is fixedly connected with a cylinder body, and the printing substrate is driven to lift and rotate through the rotation of the ball screw.

Preferably, the motor fixing device further comprises a nut fixing seat, the servo motor is fixedly connected to one side of the motor fixing seat through a bolt, one end of the nut fixing seat is fixedly connected with the base, and the nut is fixedly connected to one side of the nut fixing seat.

Preferably, the base is L-shaped, the base is provided with a bolt hole for installation, and the inner side of the base is integrally connected with a sliding rail.

Preferably, a sliding block is fixedly connected between the nut fixing seat and the motor fixing seat, the sliding block is slidably mounted on the sliding rail, and the sliding block slides on the sliding rail while the ball screw rotates.

Preferably, the driving mechanism comprises a speed reducer and a synchronous pulley, the output end of the servo motor is provided with the speed reducer, and the synchronous pulley is arranged at the output end of the speed reducer through a connecting shaft.

Preferably, the two synchronous pulleys are driven by a synchronous belt, and the upper surface of one synchronous pulley is provided with a high-precision rotary encoder by a connecting shaft.

Preferably, the output end of the high-precision rotary encoder is fixedly connected with a ball screw, and one end of the ball screw is positioned in the cylinder body.

Preferably, the upper end of the base is provided with a light source through a connecting frame.

One embodiment according to the present disclosure has the following beneficial effects when in use:

the high-precision rotary encoder is fixed on the nut fixing seat through the nut for limiting, and meanwhile, the high-precision rotary encoder is in sliding fit with the motor fixing seat through the sliding block and the sliding rail, so that the whole sliding lifting effect of the high-precision rotary encoder and the motor fixing seat is realized after the ball screw rotates;

the ball screw can be lifted and lowered while rotating, and the printing substrate can rotate and lift along with the ball screw by rotating the ball screw. Thereby realizing automatic coordination of rotation transmission, lifting transmission and selective laser, and improving the use efficiency of the laser; and the forming condition is not limited to a certain point by the cooperation of rotation and laser, so that the stress of the formed part is dispersed, and finally the problems of reducing the internal stress and optimizing the stress concentration are achieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.

FIG. 1 is a schematic view of the overall structure of a rotary stage for a laser selective melting apparatus;

FIG. 2 is a schematic side view of a rotating platform for a laser selective melting apparatus;

FIG. 3 is a partial schematic view of a rotary stage for a laser selective melting apparatus;

fig. 4 is a schematic diagram of a ball screw to print substrate and cylinder connection for a rotating platform of a laser selective melting apparatus.

The figures are marked as follows: 1. a base; 2. a synchronous pulley; 3. a synchronous belt; 4. a high-precision rotary encoder; 5. a ball screw; 6. a nut; 7. printing a substrate; 8. a cylinder; 9. a connecting frame; 10. a light source; 11. a nut fixing seat; 12. a slide block; 13. a slide rail; 14. a speed reducer; 15. a motor fixing seat; 16. a servo motor.

Detailed Description

Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

As shown in fig. 1, 2, 3 and 4, in one embodiment, a rotary platform for a laser selective melting device comprises a base 1, a nut fixing seat 11, a motor fixing seat 15 and a high-precision rotary encoder 4, wherein a light source 10 is arranged at the upper end of the base 1 through a connecting frame 9, and the high-precision rotary encoder 4 and the motor fixing seat 15 are both arranged on the inner side of the base 1 in a sliding manner; one side of the motor fixing seat 15 is fixedly connected with the servo motor 16 through a bolt, one end of the nut fixing seat 11 is fixedly connected with the base 1, one side of the nut fixing seat 11 is fixedly connected with the nut 6, the ball screw 5 is arranged in the nut 6, and the output end of the servo motor 16 is driven by the ball screw 5 through a driving mechanism; the upper end of the ball screw 5 is fixedly connected with a printing substrate 7, the periphery of the printing substrate 7 is fixedly connected with a cylinder 8, and the ball screw 5 and the printing substrate 7 are driven to ascend, descend and rotate through a servo motor 16.

In use, the light source 10 provides laser energy selective laser light for forming parts through the print substrate 7 and depositing powder. The starting servo motor 16 drives the ball screw 5 to rotate through a driving mechanism;

the high-precision rotary encoder 4 and the motor fixing seat 15 are integrally and slidably lifted by the sliding block 12 and the sliding rail 13 through the nut 6 fixed on the nut fixing seat 11, and the ball screw 5 rotates. The ball screw 5 can be lifted and lowered while rotating, and then the rotation of the ball screw 5 causes the printing substrate 7 to follow the rotation and lifting movement of the ball screw 5. Thereby realizing automatic coordination of rotation transmission, lifting transmission and selective laser, and improving the use efficiency of the laser; and the forming condition is not limited to a certain point by the cooperation of rotation and laser, so that the stress of the formed part is dispersed, and finally the problems of reducing the internal stress and optimizing the stress concentration are achieved.

In this embodiment, the base 1 is L-shaped, a bolt hole for installation is provided on the base 1, and a slide rail 13 is integrally connected to the inner side of the base 1. A sliding block 12 is fixedly connected between the nut fixing seat 11 and the motor fixing seat 15, the sliding block 12 is slidably mounted on the sliding rail 13, and the sliding block 12 slides on the sliding rail 13 while the ball screw 5 rotates.

Through this embodiment, after the ball screw 5 rotates, because the position of the nut 6 is fixed, the ball screw 5 can realize the rotation and lifting effect, and when the ball screw 5 lifts, the sliding block 12 can be driven to slide on the sliding rail 13, so as to achieve the purpose of lifting.

In this embodiment, the driving mechanism includes a speed reducer 14 and a synchronous pulley 2, the output end of the servo motor 16 is provided with the speed reducer 14, and the output end of the speed reducer 14 is provided with the synchronous pulley 2 through a connecting shaft. The two synchronous pulleys 2 are driven by the arranged synchronous belt 3, and the high-precision rotary encoder 4 is arranged on the upper surface of one synchronous pulley 2 through a connecting shaft. The output end of the high-precision rotary encoder 4 is fixedly connected with the ball screw 5, and one end of the ball screw 5 is positioned in the cylinder body 8.

With the present embodiment, the servo motor 16 is used for transmission control, the torque is amplified by the speed reducer 14 to reach the running load, and the speed reducer 14 is matched with the timing belt 3 through the output shaft timing pulley 2 to realize the rotational movement of the ball screw 5.

While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims

1. The rotary platform for the laser selective melting equipment comprises a base (1), a motor fixing seat (15) and a high-precision rotary encoder (4), and is characterized in that,

the motor fixing seat (15) is in sliding fit with the base (1), a servo motor (16) is arranged on the motor fixing seat (15),

a nut (6) is fixedly arranged on the base (1), a ball screw (5) is inserted in the nut (6), and the ball screw (5) is in threaded fit with the nut (6);

the output end of the servo motor (16) is driven by a driving mechanism and a ball screw (5);

the high-precision rotary encoder (4) is sleeved on the ball screw (5) and is used for acquiring rotation parameters of the ball screw (5);

the upper end of the ball screw (5) is fixedly connected with a printing substrate (7), the periphery of the printing substrate (7) is fixedly connected with a cylinder body (8), and the printing substrate (7) is driven to ascend, descend and rotate through the rotation of the ball screw (5).

2. The rotary platform for the laser selective melting equipment according to claim 1, further comprising a nut fixing seat (11), wherein the servo motor (16) is fixedly connected to one side of the motor fixing seat (15) through a bolt, one end of the nut fixing seat (11) is fixedly connected with the base (1), and the nut (6) is fixedly connected to one side of the nut fixing seat (11).

3. The rotary platform for the laser selective melting equipment according to claim 1, wherein the base (1) is in an L-shaped arrangement, a bolt hole for installation is formed in the base (1), and a sliding rail (13) is integrally connected to the inner side of the base (1).

4. The rotary platform for the laser selective melting equipment according to claim 2, wherein a sliding block (12) is fixedly connected between the nut fixing seat (11) and the motor fixing seat (15), the sliding block (12) is slidably mounted on a sliding rail (13), and the sliding block (12) slides on the sliding rail (13) while the ball screw (5) rotates.

5. The rotary platform for the laser selective melting equipment according to claim 1, wherein the driving mechanism comprises a speed reducer (14) and a synchronous pulley (2), the output end of the servo motor (16) is provided with the speed reducer (14), and the output end of the speed reducer (14) is provided with the synchronous pulley (2) through a connecting shaft.

6. A rotary platform for a laser selective melting apparatus according to claim 5, characterized in that two of said timing pulleys (2) are driven by a timing belt (3) provided, and that an upper surface of one of said timing pulleys (2) is fitted with a high-precision rotary encoder (4) by a connecting shaft.

7. The rotary platform for laser selective melting equipment according to claim 6, wherein the output end of the high-precision rotary encoder (4) is fixedly connected with a ball screw (5), and one end of the ball screw (5) is positioned in a cylinder body (8).

8. A rotary platform for a laser selective melting apparatus according to claim 1, characterized in that the upper end of the base (1) is provided with a light source (10) via a connecting frame (9).