CN115255389A

CN115255389A - Novel bottom plate of SLM type 3D printer

Info

Publication number: CN115255389A
Application number: CN202210922777.8A
Authority: CN
Inventors: 高炳微; 赵宏建; 郑麟韬; 张威
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2022-08-02
Filing date: 2022-08-02
Publication date: 2022-11-01

Abstract

The invention discloses a novel bottom plate of an SLM (Selective laser melting) type 3D printer, which is different from a traditional 3D printer bottom plate, wherein five groove cylinders are arranged on the novel bottom plate, the groove cylinders are respectively two waste collecting cylinders, two feeding cylinders and a forming cylinder, a baffle which can be controlled by a motor to open and close is arranged at the top of each feeding cylinder, and the baffle is used for preventing waste materials brought back by a scraper device from polluting the feeding cylinders.

Description

Novel bottom plate of SLM type 3D printer

Technical Field

The invention belongs to the technical field of 3D printing, and particularly relates to a bottom plate structure of an SLM type 3D printer.

Background

The 3D printing technology appears in the middle of the 90 s of the 20 th century, is a technology for manufacturing solid parts by accumulating materials layer by layer, and compared with the traditional material reduction manufacturing technology, the 3D printing technology has the advantages of one-step forming, short production period and capability of processing complex parts. Currently, 3D printing technologies can be classified into Selective Laser Sintering (SLS), selective Laser Melting (SLM), fused Deposition Modeling (FDM), stereo light solidification modeling (SLA), and Layered Object Manufacturing (LOM). The SLM technology utilizes high-energy laser beams to irradiate metal powder to enable the metal powder to be rapidly melted and cooled, solidified and formed, metal parts close to complete density can be directly formed, no adhesive is needed, and forming accuracy and mechanical properties are excellent, so that the SLM technology is more and more widely applied to the fields of automobiles, aerospace, medical treatment, war industry and the like. At present, the SLM type 3D printer adopts a bottom plate structure with a single feeding cylinder and a single waste collecting cylinder, and the bottom plate structure is useless in the return process of a scraper device, so that the processing time is relatively wasted.

Disclosure of Invention

Therefore, aiming at the problems, the invention provides the novel SLM 3D printer, and compared with other SLM type 3D printers, the novel SLM 3D printer can realize back-and-forth printing and greatly reduce the printing time.

In order to achieve the technical problem, the invention adopts the technical scheme that the 3D printer comprises a laser, a bottom plate, two feeding cylinders, two waste collecting cylinders and two double-opening type baffle plates, wherein the laser works once after the progress of the scraper device is finished, the laser works once after the return stroke of the scraper device is finished, the two feeding cylinders are respectively fixed on two sides of the bottom plate, the two waste collecting cylinders are respectively fixed on the inner sides of the feeding cylinders of the bottom plate, the double-opening type baffle plates are arranged above the feeding cylinders, and the baffle plates are opened and closed according to the working state.

By adopting the technical scheme, the invention has the beneficial effects that:

in the invention, when the scraper device works in the process, the baffle of the return end feeding cylinder is in a closed state, when the scraper device works in the return process, the baffle of the return end feeding cylinder is in a closed state, and in one working cycle of the scraper device, the laser scans twice, so that compared with the single working cycle laser of the traditional SLM type 3D printer, the laser scanning device scans once, and the time required by printing is shortened.

Drawings

FIG. 1 is an overall schematic view of the present invention

FIG. 2 is a process diagram of the present invention

FIG. 3 is a schematic diagram of the backhaul operation of the present invention

FIG. 4 is a schematic view of a single-side feed cylinder and a double-acting baffle of the present invention

In the drawings, 1-the forming chamber; 2-a scraper module; 3-driving a motor; 4-linear guide rail; 5-a waste collection tank; 6-synchronous guide rail of scraper; 7-a forming cylinder; 8-a feeding cylinder; 9-a scraper cleaning device; 10-double open baffle; 11-a collection bottle; 12-processing the bottom plate; 13-a collection bottle; 14-a lifting platform; 15-double open baffle; 16-a feeding cylinder; 17-a lifting platform; 18-a waste collection vat; 19-laser source.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1, 2, 3 and 4, in an embodiment of the present invention, a novel bottom plate of an SLM type 3D printer includes a 12-printer bottom plate, which is provided with 5 groove cylinders, wherein the groove cylinders are respectively a 5-waste collecting cylinder, an 8-feeding cylinder, a 7-forming cylinder, a 16-feeding cylinder and an 18-waste collecting cylinder, the bottom of the 8-feeding cylinder is provided with a 14-lifting table, the bottom of the 16-feeding cylinder is provided with a 17-lifting table, which are all used for controlling the supply of powder, and the bottoms of the 5-waste collecting cylinder and the 18-waste collecting cylinder are provided with waste collecting bottles for collecting the waste remaining from a scraper device.

The 12-printer bottom plate is provided with a 5-waste collecting cylinder, an 8-feeding cylinder, a 16-feeding cylinder and an 18-waste collecting cylinder, and 3D printing can be performed in a bidirectional feeding and waste collecting mode during printing, so that the purpose of shortening the processing time is achieved.

Above the 8-feed cylinder there is a 10-double-opening baffle, whose main purpose is to prevent contamination of the feed cylinder by bringing waste into the 8-feed cylinder during the return stroke of the doctor apparatus.

The working principle and the using process of the invention are as follows: when the automatic printing device is used, a model to be printed is input into a printer firstly, then printing is started, after the printer receives a printing command, the 3D printer is changed from the initial working state shown in the figure 1 into a process working state shown in the figure 2, in the process, a 3-scraper device starts to carry out working along a 4-linear guide rail and a 6-scraper synchronous guide rail, a left side 8-lifting platform of a feeding cylinder controls feeding, at the moment, a 10-telescopic single plate is in an open state, after a scraper passes through a 7-forming cylinder, a 19-laser source sinters the forming cylinder, a 16-15-double-open baffle above the feeding cylinder is in a closed state, waste materials carried by the scraper are prevented from not entering the feeding cylinder, and then the scraper brings the waste materials into an 18-waste material collecting cylinder to finish process processing; subsequently, the process state of fig. 2 is changed to the return process state of fig. 3, 16-the 17-stage of the feed cylinder controls the feed, at which point 15-the double-acting shutter is open, 19-the laser source will sinter the forming cylinder after the scraper has passed 7-the forming cylinder, 8-the 10-double-acting shutter above the feed cylinder is closed, and the scraper will then bring the waste into the 5-waste collection cylinder, completing the process.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a novel bottom plate of SLM type 3D printer which characterized in that: including printer bottom plate (12), seted up 5 groove jars, the groove jar is garbage collection jar (5), feed jar (8), forming cylinder (7), garbage collection jar (18), feed jar (16), collecting bottle (11) are installed to the below of garbage collection jar (5), the effect of collecting bottle (11) is the waste material of collecting scraper device and carrying, there is baffle (10) above the feed jar (8).

2. The new backplane of SLM-type 3D printer according to claim 1 characterized in that: the baffle (10) is a double-opening baffle, the baffle is opened and closed by a motor driving a gear, and sliding rails are arranged on two sides of the baffle to avoid dislocation of the baffle; the shutter can be automatically opened and closed according to the working state of the printer.

3. The new backplane of SLM-type 3D printer according to claim 1 characterized in that: the feeding cylinders (8) and the feeding cylinders (16) are symmetrically distributed according to the forming cylinder (7); the scrap collecting (5) and the scrap collecting cylinders (18) are symmetrically distributed according to the forming cylinder (7), and the scrap collecting cylinders are arranged outside the feeding cylinder.