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    Discussion in 'The main mechanical design forum' started by hprashant, Mar 5, 2014.

    1. hprashant

      hprashant New Member

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      Hello,
      I am Researcher working on Design Feedback systems. Its difficult to find professional designers or manufacturers here in campus, so I though of taking some online help. I would be glad if you guys could take some timeout and reply to these questions

      1) How do designers and Manufacturers work in general? very closely as a unit? independently etc...
      2) How is design information passed between designers and manufacturers? 2D drawings, 3D drawings....
      3) How do manufacturers analyze the design? Do they use any software? or manual analysis...
      4) How is the feedback transferred back to the designer, mode of the feedback?? writing, another drawing...
      5) Any general / personal experience that you had as a designer or manufacturer that you would like to say about...

      I am sorry for asking so many questions but these would help me enormously to build up a good experiment design for my research

      Thanx
      Prashant
       
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    3. paulsteyn

      paulsteyn New Member

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      Hi Prashant,

      I am a Mechanical Design Engineer for a company in South Africa that designs and manufactures vehicles for use in the mining industry.

      I will give you feedback on what we as a company do, this is not necessarily an accurate representation of what the industry as a whole does, but I hope it helps:


      1) How do designers and Manufacturers work in general? very closely as a unit? independently etc...

      Our design office is situated in the same building as our factory. We have the freedom to talk to artisans regarding the practicality/manufacturability of our designs. Although the fabrication/assembly staff can not force a design to change, they can provide advice. I have found that this helps eliminate problems at a later stage when the machine needs to be manufactured. If, during manufacturing of a prototype, there are problems with the design or points where the design can be optimised, the workshop staff have the freedom to request changes. The responsibility to action the changes if they are justifiable still rests with the designer in this case.

      2) How is design information passed between designers and manufacturers? 2D drawings, 3D drawings....

      We do the full design (that is, all designed as well as purchased components) in SolidWorks. We then submit a detailed data pack to the workshop. A data pack would typically consist of about 300-600 2D drawings. There is usually one isometric 3D image on the page, together with all the 2D images required for the artisan to understand the design. For the record, I don't think this is the best way of doing it, since we often have queues of artisans asking us to open the 3D models so that they can see a dimension we may have missed.

      3) How do manufacturers analyze the design? Do they use any software? or manual analysis...
      We would typically do some hand calculations to check the basic structure of a vehicle. We would then identify the critical components in a design and do an in-depth FEA on them. In cases where there are legislative requirements, we would go as far as to contract specialist consultants to provide a software based numerical solution and verification of the design.


      4) How is the feedback transferred back to the designer, mode of the feedback?? writing, another drawing...

      During the design phase, the designer would host design reviews throughout the process. This is where managers, artisans, other designers and sometimes specialists sit in an critique the design while the designer has to defend his/her decisions.

      During the manufacturing of a vehicle, the artisans provide continuous feedback to the designer verbally. During the manufacturing of a prototype, the customer is also invited a few times and given the option to critique the design.

      After the project was done, the designer hosts a final design review where everyone involved in the project has the option to participate in the "autopsy" of the project. This is where we try to learn from the mistakes made and change policy to avoid making the same mistake twice.

      5) Any general / personal experience that you had as a designer or manufacturer that you would like to say about...

      I have provided opinions throughout the other questions. I hope this helps. All the best with your research.

      Best Regards
      Paul
       
    4. hprashant

      hprashant New Member

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      Thanks Paul that was really helpful, I appreciate it. :)
       

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