Aluminum or copper laser 3D printing blade face steel bar adhesive tape composite powder scraper

A 3D printing and scraper technology, applied in the improvement of process efficiency, additive manufacturing, additive processing, etc., can solve problems such as residual stress increase, residual stress, scraper hitting parts, etc., to improve connection stability, Avoid bias moment, avoid further deterioration of the effect

Pending Publication Date: 2020-03-24

GUIZHOU POWER GRID CO LTD

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AI-Extracted Technical Summary

Problems solved by technology

[0010] 2. Residual stress

[0015] 3. Crack

[0018] 4. Warping

[0021] 5. Local uplift

Expansion or spheroidization causes local swelling of the aluminum or copper laser 3D printed workpiece, which may cause the risk of the scraper hitting the part

[0023] (2) Causes of defects in aluminum or copper laser 3D printing

[0025] The powder has impurity powder, the powder fluidity is not good, the powder particles are too large, and the powder reflectivity is too large

[0026] 2. Laser parameters are unreasonable

The laser scanning control is unrea...

Abstract

The invention discloses an aluminum or copper laser 3D printing blade face steel bar adhesive tape composite powder scraper. The scraper comprises a front K-shaped rubber strip scraper, a blade face steel strip scraper and a rear K-shaped rubber strip scraper, the front K-shaped rubber strip scraper, the blade face steel strip scraper and the rear K-shaped rubber strip scraper are fixedly connected to a scraper rest, and the blade face steel strip scraper is located between the front K-shaped rubber strip scraper and the rear K-shaped rubber strip scraper. The K-shaped adhesive tape scraper and the rear K-shaped adhesive tape scraper are symmetrically arranged on the two sides of the blade face steel strip scraper, so the generation of bias torque is avoided, the powder scraping is uniform, and the powder scraping effect of the scraper is improved; the K-shaped adhesive tape scrapers on the two sides are main powder scraping cutters, meanwhile, the blade face steel strip scraper is adopted as an auxiliary cutter, local ultrahigh protrusions and spheroidized molten drops of each layer of printing are planed, and the protrusions are prevented from continuing to deteriorate.

Application Domain

Additive manufacturing apparatusIncreasing energy efficiency

Technology Topic

Composite materialKnife holder +3

Image

Examples

Experimental program(1)

Example Embodiment

[0060] Example 1: Such as Figure 1-Figure 8 As shown, an aluminum or copper laser 3D printing blade surface steel strip rubber strip composite scraper, including a front K-shaped rubber strip scraper 1, a blade surface steel strip scraper 2 and a rear K-shaped rubber strip scraper 3, front K-shaped rubber The strip scraper 1, the blade surface steel strip scraper 2 and the rear K-shaped rubber strip scraper 3 are fixedly connected to the knife holder 4, and the blade surface steel strip scraper 2 is located between the front K-shaped rubber strip scraper 1 and the rear K-shaped rubber strip scraper 3.

[0061] Preferably, the blades of the front K-shaped rubber strip scraper 1 and the rear K-shaped rubber strip scraper 3 are in the same plane, and the blade surface of the steel strip scraper 2 is lower than the front K-shaped rubber strip scraper 1 or the rear K-shaped rubber strip scraper 3. The blade of the blade face is 0.03-0.05mm.

[0062] Preferably, a gap is maintained between the blade of the blade face steel strip scraper 2 and the blade of the front K-shaped rubber strip scraper 1 and the blade of the rear K-shaped rubber strip scraper 3.

[0063] Preferably, the above-mentioned tool holder 4 includes a front scraper 5 and a rear scraper 6. The rear scraper 6 is fixedly connected to the front scraper 4 by screws 7. A convex shape is provided on the lower side between the front scraper 5 and the rear scraper 6. The installation slot 8, the front scraper 5 and the rear scraper 6 of the cross section are crimped and fastened to the blade surface steel strip scraper 2 in the middle of the installation slot 8, and the two sides of the blade surface steel strip scraper 2 are respectively pressed against the front K-shaped rubber strip scraper 1 and back K-shaped rubber strip scraper 3.

[0064] Preferably, the tool holder 4 further includes a front K-shaped rubber strip press bar 9 and a rear K-shaped rubber strip press bar 10. Both ends of the installation knife groove 8 are respectively provided with two symmetrical U-shaped notches 11, the front K-shaped The two ends of the rubber strip pressing rod 9 and the rear K-shaped rubber strip pressing rod 10 are respectively embedded in the two rows of U-shaped notch grooves 11 to respectively press the front K-shaped rubber strip scraper 1 and the rear K-shaped rubber strip scraper 3, the front K-shaped The rubber strip pressing rod 9 and the rear K-shaped rubber tape pressing rod 10 abut on both sides of the blade surface steel strip scraper 2.

[0065] Preferably, the back of the blade surface steel strip scraper 2 is provided with a screw installation U-shaped groove 12, and is abutted with two symmetrical adjusting screws 13, which are screwed out and connected to the top of the blade holder 4.

[0066] Preferably, the front K-shaped rubber strip scraper 1 and the rear K-shaped rubber strip scraper 3 are made of silicone rubber.

[0067] Preferably, the material of the blade face steel strip scraper 2 is tungsten steel or super-hard high-speed steel, the blade face steel strip scraper 2 has a flat scraping surface, the two corners of the scraping surface are right angles, and the length of the blade face steel strip scraper 2 is equal to the printing substrate width.

[0068] Tolerance for slight bumps: when there are impurities in the powder or other reasons, a small part of the cross section of a certain layer is slightly bumped, the flexible scraper can let the slightly bumped position continue to flatten the rest of the section, and a small part of the slight bump will follow Scanning of layers automatically repairs the leveling. Therefore, in order to improve the reliability of aluminum or copper laser 3D printer squeegee, it is necessary to allow the printer to be fault-tolerant to slight bumps, and use flexible hanging knives.

[0069] High-precision printing powder squeegee: In terms of printing quality and accuracy, a hard squeegee is more advantageous than a flexible squeegee. In order to improve the printing quality and progress, a hard squeegee is used.

[0070] High-precision fault-tolerant powder coating scraper: In order to meet the needs of high-quality, high-precision, and appropriate fault tolerance for aluminum or copper laser 3D printing, it is necessary to achieve the characteristics of a rigid scraper and a flexible scraper on the same scraper. Therefore, an aluminum Or copper laser 3D printing blade surface steel strip rubber strip composite doctor blade.

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Aluminum or copper laser 3D printing blade face steel bar adhesive tape composite powder scraper

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

PUM

Description & Claims & Application Information

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