• Welcome to engineeringclicks.com
  • Need ideas for my mechanical engineering project!

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

    1. engnewbie

      engnewbie New Member

      Joined:
      Mar 2016
      Posts:
      1
      Likes Received:
      0
      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?
       
    2.  
    3. Dana

      Dana Well-Known Member

      Joined:
      Sep 2010
      Posts:
      377
      Likes Received:
      3
      Completely mechanical? One word: cams.
       
    4. DerekT

      DerekT Member

      Joined:
      Mar 2017
      Posts:
      6
      Likes Received:
      0
    5. Frankvftw

      Frankvftw New Member

      Joined:
      Mar 2017
      Posts:
      4
      Likes Received:
      0
    6. kuohu

      kuohu Member

      Joined:
      May 2013
      Posts:
      7
      Likes Received:
      0
      The question immediately made me think about fairground claw machines.
       
    7. VinceDan

      VinceDan Member

      Joined:
      Apr 2018
      Posts:
      5
      Likes Received:
      0
      See this as a solution
       
    8. GoodCat

      GoodCat Well-Known Member EngineeringClicks Expert

      Joined:
      Nov 2018
      Posts:
      86
      Likes Received:
      0
      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. pri2347

      pri2347 Member

      Joined:
      Dec 2018
      Posts:
      7
      Likes Received:
      0
      You could make it using the concept of crane.
       
    10. john12

      john12 Well-Known Member EngineeringClicks Expert

      Joined:
      Dec 2018
      Posts:
      299
      Likes Received:
      0
      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:

      [​IMG]

      How big are the blocks?
       
    11. GoodCat

      GoodCat Well-Known Member EngineeringClicks Expert

      Joined:
      Nov 2018
      Posts:
      86
      Likes Received:
      0
      Here the main problem is control and positioning. If the cubes are large, then yes, this is a portal-type device like a crane, but I would not use the design of a crane, but rather a portal manipulator would be more suitable. The construction of the crane itself does not have precise positioning as it uses cables to lift and lower the load, which means that in the process of work all this will swing, which is not permissible for this task.
      I think the crane is suitable if it will be blocks at least with a size of 20 inches
      I suspect that these are ordinary 1 inch ice cubes)
       

    Share This Page

    By using this website you agree to our Cookies usage. We and our partners operate globally and use cookies, including for analytics, personalisation, ads and Newsletters