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작성자달봉이 조회 4회 작성일 2021-06-12 12:08:27 댓글 0

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Hexagonal nuts as heat set (thermal) threaded inserts into 3D printing

In this video I am testing can I use hexagonal screw nuts as thermal (heat set) inserts into 3D printed objects. I am doing some comparison with existing brass inserts measuring the pull-out force.
There are some other load types, like torque and main load from other, supported, side, but only pull out force is measured, since this is the weak point for these hex nuts as thermal inserts. In first part of video I am testing, how big hole I need for inserting hex nuts using a soldering iron (200°C). In other part I am comparing hex nuts to existing injection molding and 3D printing brass inserts.

Contents
0:00 - Introduction
3:36 - Preparing hex nut tests (what hole size?)
5:21 - Pull out test with hex nuts
6:45 - Result of the first test
6:55 - Preparing second test (nuts and brass inserts)
7:51 - Pull out tests (nuts and brass inserts)
7:59 - Hex nut test
8:33 - Injection molding insert test
9:21 - 3D printing insert test
10:41 - Results from test 2
11:15 - Conclusions

Matherials and methods
Prusa MK3 3D printer, Prusament PLA filament, 215°C printing temperature, 0.2mm layer height, 100% infill, 5-6 perimeters (walls), M3 steel screw nuts, M3 injection molding interts (M3 x L3mm), M3 3D printing inserts (M3 x L5mm x D4.22), TS100 soldering iron set to 200°C.

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Mentioned video in introduction, by CNC kitchen:

Sky : The third type of insert nut is called a Double Twill insert nut
Luis Mauro Freitas : Hello, very good video! I also suggest comparative torsion tests ...
sket123 flamez : see what happens when u stop working out
Alan John : You should get/make a block and tackle or pulley set up for these tests. You'd be able to test to much higher forces without hurting yourself. Great work though! Very useful info
Bobis32 Commentary : i wonder how the nuts would fare if you created basic knurling on the outer surface

... 

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