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Main => Builders Discussions => Topic started by: binto100 on January 06, 2011, 02:35:11 PM
Greetings.
A few months ago I introduced myself and my goal of first building a motion platform by way of this thread: http://www.cockpitbuilders.com/community/index.php?topic=1075.msg8209#msg8209
Shortly thereafter I purchased a mill so I did not have to rely on a machine shop everytime I needed a prototype part. I am not a machinist and there has been a learning (and spending) curve but I am now back on track.
The basic platform will be constructed using 80/20 and one of the many parts I need are very strong hinges that will become part of four anti-yaw assemblies. I designed the hinges and had the individual pieces cut out of 1" aluminum by water jet. Here I've made a jig to hold two hinge pieces in place:
(https://www.cockpitbuilders.com/proxy.php?request=http%3A%2F%2Ffarm6.static.flickr.com%2F5090%2F5331069811_a24dc3f937.jpg&hash=d673f71497c5240f12ddce598c67a78dcbeccc84)
Here I am using a boring head to bore a 1.249 inch hole into both pieces before I press in oil sintered bronze bushings:
(https://www.cockpitbuilders.com/proxy.php?request=http%3A%2F%2Ffarm6.static.flickr.com%2F5243%2F5331680140_4f7f643d7c.jpg&hash=c7b8a97aa1dbdc691eab5036fc215c5e047779a4)
Here is the assembled hinge. For final assembly I will mill the bushings flush, install needle thrust bearings in the middle and on both sides of the hinges, and use shaft collars to keep everything in place.
(https://www.cockpitbuilders.com/proxy.php?request=http%3A%2F%2Ffarm6.static.flickr.com%2F5285%2F5331070515_079cf42fa9.jpg&hash=4b8ade07aa40dbb021147cd96c4a0b0132610876)
(https://www.cockpitbuilders.com/proxy.php?request=http%3A%2F%2Ffarm6.static.flickr.com%2F5001%2F5331680294_c52c444c0d.jpg&hash=65fa48172b03b0323e412a7b0a80d0b747c92b14)
(https://www.cockpitbuilders.com/proxy.php?request=http%3A%2F%2Ffarm6.static.flickr.com%2F5009%2F5331070377_65f4150e76.jpg&hash=ac04d715823cf21198e18828ef41a2f6da015638)
It's not an attractive or elegant hinge but it is silky smooth and I must say seems very reluctant to flex. One pair done, 15 more to go!
More to come as more gets done.
Bruce