CN110216284B

CN110216284B - Embedded laser selective melting 3D printing substrate

Info

Publication number: CN110216284B
Application number: CN201910490734.5A
Authority: CN
Inventors: 曹志强; 曹晟; 杨义; 沈爱萍; 张和; 侯娟
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2021-05-04
Anticipated expiration: 2039-06-06
Also published as: CN110216284A

Abstract

The invention provides an embedded substrate for 3D printing through selective laser melting, which comprises a substrate, bolt holes, a grid scale, clamping grooves, an operation test block and a fixed embedded block, wherein the substrate is provided with at least two bolt holes for installation and fixation, the surface of the substrate is provided with the grid scale, the substrate is provided with at least one mutually parallel clamping groove, the clamping groove is internally provided with a detachable operation test block, and the operation test block is clamped and fixed in the clamping groove through a wedge-shaped fixed embedded block. In this application, the different operation test blocks of big small dimension are installed to the embedded operation test block in the draw-in groove on the base plate to pinpoint, the base plate zero-bit after the installation of operation test block need not adjust, and the operation test block after the work can be lifted off fast, need not reprocess the base plate. The draw-in groove adopts special-shaped design, and required operation test block can be placed to one side, and the opposite side reaches fixed effect through inserting fixed abaculus, and the position and the size of draw-in groove can be set for according to the experiment needs.

Description

Embedded laser selective melting 3D printing substrate

Technical Field

The invention relates to the field of 3D printing, in particular to an embedded substrate for 3D printing by selective laser melting.

Background

Additive manufacturing is commonly known as 3D printing, and is a manufacturing technology which integrates computer aided design, material processing and forming technology, is based on a digital model file, and is used for stacking special metal materials, non-metal materials and medical biological materials layer by layer through software and a numerical control system according to modes of extrusion, sintering, melting, photocuring, spraying and the like to manufacture solid objects.

The Selective Laser Melting (SLM) technology takes metal powder as a raw material, a scanning system controls a Laser beam to act on the powder in a region to be formed according to layered slicing information of a three-dimensional CAD model of a formed part, so that the powder is melted, the powder is formed after cooling, a layer is scanned, a workbench descends to a certain height, a layer of powder is paved, and the powder is melted again, so that the powder is repeatedly accumulated until the forming of the whole part is completed. The selective laser melting metal 3D printing can directly manufacture metal parts and has outstanding advantages. When printing metal parts, adopt with the material or close material as the base plate usually, let part "long" on the base plate, because quick cooling, the part of printing can produce very big stress simultaneously at the printing in-process, leads to the part deformation of printing in-process, prints the part on the base plate, can effectively prevent that the part from warping.

After the printing of the parts is finished, the required parts can be cut off from the substrate by wire cutting, and then the surface of the substrate is machined, so that the substrate can be put into reuse.

In SLM printing process testing or research, local printing tests on a sample are often used, such as laser scanning with a 20mm x 20mm metal block placed on a substrate or printing a sample on a small metal block. Generally, a test object is welded on a substrate or fixed by a clamp, which brings convenience and economy in the actual operation process, for example, by adopting a welding method, a metal test block for an experiment cannot be flexibly positioned, and the metal test block is difficult to take down after the experiment is completed; if the clamp is used for fixing, the clamp with a complex structure is needed due to the compact internal space of the printer, and the zero position of the substrate can be adjusted more complexly.

Disclosure of Invention

The invention aims to provide an embedded substrate for 3D printing by selective laser melting, which is convenient for positioning and fixing operation test blocks for testing, can fix a plurality of operation test blocks with different specifications at one time, can be reused and can quickly determine the zero position of the substrate.

In order to achieve the purpose, the invention provides an embedded substrate for 3D printing through selective laser melting, which comprises a substrate, bolt holes, a grid scale, a clamping groove, an operation test block and a fixing embedded block, wherein the substrate is provided with at least two bolt holes for installation and fixation, the surface of the substrate is provided with the grid scale, the substrate is provided with at least one clamping groove which is parallel to each other, the clamping groove is internally provided with a detachable operation test block, and the operation test block is clamped and fixed in the clamping groove through the wedge-shaped fixing embedded block.

Furthermore, in the embedded substrate for selective laser melting 3D printing, the bolt holes are symmetrically arranged at four corners of the substrate.

Further, in the substrate for 3D printing of embedded laser selective melting, the clamping groove is a special-shaped clamping groove, the upper width of the clamping groove is smaller than the lower width of the clamping groove, and the inner angle of one side of the clamping groove is a right angle.

Further, in the substrate for 3D printing by selective melting of embedded laser, the upper width of the clamping groove is equal to the upper width of the operation test block, the lower width of the clamping groove is equal to the lower width of the operation test block and the lower width of the fixed insert block, and the depth of the clamping groove is equal to the thickness of the operation test block.

Further, in the substrate for 3D printing of embedded laser selective melting, the clamping groove is divided into a large clamping groove and a small clamping groove, the width of the large clamping groove is 40-60 mm, and the width of the small clamping groove is 20-30 mm.

Furthermore, in the embedded laser selective melting 3D printing substrate, the substrate and the operation test block are both made of metal.

Furthermore, in the embedded laser selective melting 3D printing substrate, the fixed insert block is made of soft heat conduction materials such as copper alloy.

Compared with the prior art, the invention has the following beneficial effects:

1) the embedded operation test block that installs the size specification difference on the base plate to pinpoint, the base plate zero-bit after the operation test block installation need not adjust, 3D prints the test or after the experiment is accomplished, and the operation test block can be lifted off fast, and the base plate need not reprocess.

2) The embedded clamping groove is designed in a special shape, a required operation test block can be placed on one side, the other side achieves a fixing effect by inserting the fixed embedded block, and the position and the size of the clamping groove can be set according to experiment requirements. The depth of the clamping groove is consistent with the height of the test block, and the zero position of the substrate is kept unchanged after the test block is installed.

3) The laser through the 3D printer scans, and the grid scale is melt and etched through high temperature on the surface of the substrate, so that the metal test block is convenient to position.

4) The wedge-shaped fixed embedded block adopts an interference fit design, and the operation test block can be fixed at a required position.

Drawings

FIG. 1 is a schematic structural diagram of an embedded laser selective melting 3D printing substrate according to the present invention;

fig. 2 is a schematic side view of the substrate shown in fig. 1.

Detailed Description

The embedded laser selective melting 3D printing substrate of the present invention will be described in more detail with reference to the schematic drawings, in which preferred embodiments of the present invention are shown, it being understood that a person skilled in the art may modify the invention described herein while still achieving the advantageous effects of the invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated without limiting the specific scope of protection of the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

As shown in fig. 1, the invention provides an embedded substrate 010 for laser selective melting 3D printing, which includes a substrate 010, bolt holes 011, a grid scale 030, a clamping groove, an operation test block 040 and a fixed insert 023, wherein the substrate 010 is provided with the bolt holes 011 for installation and fixation, the bolt holes 011 are symmetrically arranged at four corners of the substrate 010, the substrate 010 is matched with a corresponding printer, the thickness and the installation mode of the substrate 010 are the same as those of a common substrate, and installation and zero adjustment are facilitated. The grid ruler 030 is arranged on the surface of the substrate 010, accurate positioning grids are formed on the surface of the substrate 010 through laser melting through corresponding printers, and the distance between the grid ruler 030 can be adjusted according to the size of the substrate 010 and the experiment requirement. The base plate 010 is provided with at least one mutually parallel clamping groove, a detachable operation test block 040 is arranged in the clamping groove, and the operation test block 040 is clamped and fixed in the clamping groove through a wedge-shaped fixed embedded block 023.

Further, in this embodiment, the draw-in groove is special-shaped draw-in groove, and the last width of draw-in groove is less than the lower width of draw-in groove, and one side interior angle of draw-in groove is the right angle. The upper width of the clamping groove is equal to the upper width of the operation test block 040, the lower width of the clamping groove is equal to the lower width of the operation test block 040 and the lower width of the fixed insert 023, and the depth of the clamping groove is equal to the thickness of the operation test block 040. That is, after the operation block 040 is fitted, the zero position of the substrate 010 remains unchanged. And the clamping groove transversely penetrates through the whole substrate 010, so that the operation test block 040 is convenient to install, and the wedge-shaped fixed insert 023 can be plugged into the side surface after the operation test block 040 is loaded. The operation block 040 can be fixed to any position of the entire notch. The number of the card slots can be increased or decreased according to the number of the operation test blocks 040, and the positions of the card slots can be adjusted according to the needs of the test.

Can set up the draw-in groove of multiple not unidimensional simultaneously on base plate 010 if needs, the draw-in groove is divided into big draw-in groove 022 and little draw-in groove 021, and the width of big draw-in groove 022 is 40 ~ 60mm, and the width of little draw-in groove 021 is 20 ~ 30 mm.

Specifically, the substrate 010 and the operation block 040 are both made of metal, and the fixing insert 023 is made of a soft heat conductive material such as copper alloy. After the fixing insert 023 clamps the operation test block 040 at a predetermined position in the clamping groove, the fixing insert 023 is properly expanded after the substrate 010 is heated, so that the operation test block 040 is ensured not to be loosened. After printing, the fixed insert 023 can be pulled out, the operation test block 040 can be conveniently taken down, and the length of the fixed insert 023 can be cut as required.

In summary, in the embodiment, the embedded laser selective melting 3D printing substrate provided has the following advantages:

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The substrate for the embedded laser selective melting 3D printing is characterized by comprising a substrate, bolt holes, a grid scale, clamping grooves, an operation test block and a fixed embedded block, wherein the substrate is provided with at least two bolt holes for installation and fixation, the surface of the substrate is provided with the grid scale, the substrate is provided with at least one mutually parallel clamping groove, the clamping groove is internally provided with a detachable operation test block, and the operation test block is clamped and fixed in the clamping groove through the wedge-shaped fixed embedded block.

2. The substrate for embedded laser selective melting 3D printing according to claim 1, wherein the bolt holes are symmetrically arranged at four corners of the substrate.

3. The embedded substrate for laser selective melting 3D printing according to claim 1, wherein the slot is a special-shaped slot, the upper width of the slot is smaller than the lower width of the slot, and the inner angle of one side of the slot is a right angle.

4. The substrate for embedded laser selective melting 3D printing according to claim 3, wherein the upper width of the slot is equal to the upper width of the operation block, the lower width of the slot is equal to the lower width of the operation block and the lower width of the fixing block, and the depth of the slot is equal to the thickness of the operation block.

5. The substrate for embedded laser selective melting 3D printing according to claim 4, wherein the clamping grooves are divided into large clamping grooves and small clamping grooves, the width of the large clamping grooves is 40-60 mm, and the width of the small clamping grooves is 20-30 mm.

6. The substrate for embedded laser selective melting 3D printing according to claim 1, wherein the substrate and the operation test block are both made of metal.

7. The substrate for embedded laser selective melting 3D printing according to claim 1, wherein the fixing insert is made of copper alloy.