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• # Need ideas for my mechanical engineering project!

Discussion in 'The main mechanical design forum' started by engnewbie, Feb 9, 2017.

1. ### engnewbieNew Member

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So I'm not on here looking for someone to do my project for me lol but I would appreciate some ideas and I'm stumped.

We're supposed to design and draw a machine that builds a square pyramid that consists of layers of ice blocks, each upper layer decreasing in perimeter. Ice blocks are produced every 30s and our machine has to pick up the ice blocks and set up the pyramid including the upper layers but it can't build it from the inside. We have to find a way to design this machine that moves and picks up ice blocks at different heights but it has to be completely mechanical.

If you guys could point me in the right direction and give me examples of mechanical mechanisms that could work to accomplish those actions. Nguyen Duc Thang library of 2100 mechanisms has given me some ideas but I don't know...

Thoughts?

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3. ### DanaWell-Known Member

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Completely mechanical? One word: cams.

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Robotics

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7. ### VinceDanMember

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See this as a solution

8. ### GoodCatWell-Known MemberEngineeringClicks Expert

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This machine will not be completely mechanical, no matter how hard you try)

You will definitely need computer control and a blocks search algorithm.

I think the easiest way is a portal-type robot or arm manipulator.

The robot must have a holder which will exactly place the cube in the center of the grip.

You can create a very simple program to control this robot. I think this will be a program in several cycles, each level of the pyramid will be a separate subroutine. Each subroutine will build one level of the pyramid, then the prekhob to the next cycle and so on. It is possible to build a robot with a cantilevered rail of MGN, thus it will be compact, simple and cheap to make and quite functional.

Of course, you can build a fully mechanical device in order to give up control, but it will be a very complicated and cumbersome structure and such a machine will be able to build a pyramid of only one size. Adjusting it for other sizes will be very difficult and will require mechanical changes up to a complete design change.

I apologize for curiosity, but why do you need such a machine? =)

9. ### pri2347Member

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You could make it using the concept of crane.

10. ### john12Well-Known MemberEngineeringClicks Expert

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Yeah, my first thought was to create something with a crane in a frame work. So it looks almost like a 3D printer (with a frame that can move in three axes) but instead of the printhead/extruder there's something to grab the blocks.
It would basically be a small version of an overhead crane:

How big are the blocks?

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