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  • need help for my project work

    gsk_ssit

    Member

    Updated: Oct 25, 2024
    Views: 1.3K
    i am doing bearing cup using cold forging i.e backward extrusion process
    the initial billet height is 13mm and dia 20mm my question is in how many stages i.e sequence of operations can we do this to get 14mm inner dia and 14mm depth
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  • Harish shekhawat

    Member • Feb 26, 2011

    gsk_ssit
    i am doing bearing cup using cold forging i.e backward extrusion process
    the initial billet height is 13mm and dia 20mm my question is in how many stages i.e sequence of operations can we do this to get 14mm inner dia and 14mm depth
    the knowlage of the material property is must , such as yeild stress ,ductility, elastic modulus of the material you are going to use .
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  • gsk_ssit

    Member • Feb 27, 2011

    yes the material used here is c45(AISI 1045) ,wat i want is sequence of producing a part
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  • ISHAN TOPRE

    Member • Feb 28, 2011

    Interesting.I also want to know about it.Can any one tell us a relation between the number of steps and size of billet?
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  • mech. royal

    Member • Mar 24, 2011

    any one can tell me how to decide the angle of fan of a heli copter.please give all the parameters
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  • ISHAN TOPRE

    Member • Mar 24, 2011

    Have you tried for existing ones? Why don't you connect them symmetrically? for example if you use 3 blades you can have them 120 degrees apart. The more important fact you must consider is what will be various angles so that the blades produce greater lift.
    The less number of wings you use the better but it will only require more power to be developed. 😀
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  • mech. royal

    Member • Mar 24, 2011

    ishutopre
    Have you tried for existing ones? Why don't you connect them symmetrically? for example if you use 3 blades you can have them 120 degrees apart. The more important fact you must consider is what will be various angles so that the blades produce greater lift.
    The less number of wings you use the better but it will only require more power to be developed. 😀
    ya we use 2combined blades having 15 degree angle at each side but it is not enough to lift.or we have to use heavy power supply which increase its weight.....which create a great problem.
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