• Title/Summary/Keyword: Flash Width to Thickness Ratio

Search Result 2, Processing Time 0.016 seconds

An Experimental Study on Forming an Axi-Symmetric Dome Type Closed-Die Forging Product Using Modeling Material(I) (모델링재료를 이용한 축대칭형 돔형상의 폐쇄단조 성형 연구 (I))

  • 이근안;임용택;이종수;홍성석
    • Transactions of the Korean Society of Mechanical Engineers
    • /
    • v.16 no.11
    • /
    • pp.2082-2089
    • /
    • 1992
  • An experimental study on forging an axi-symmetric dome type of AISI4130 was carried out using modeling material. In order to verify the validity of the experimental data, a similarity study between plasticine and AISI4130 has been made. Friction conditions were characterized by ring test for the various lubricants. For the closed-die forging experiments of an axi-symmetric dome type of AISI4130 using the plasticine, various cylindrical billets with different aspect ratios were forged and different flash width to thickness(W/T) ratios were used in order to determine the optimum forging conditions. As W/T ratios decrease forging loads decrease while excess volumes increase. It was found out that the experimental results reproduce the similiar results available in the literature. As a result of these experiments, it was construed physical modeling is an excellent tool for forging process simulation at a practical level.

Evaluation on Performance of Chill Vent in High Pressure Die Casting by Using a Commercial Software (상용 열유동 해석 소프트웨어를 이용한 다이캐스팅 칠벤트의 성능평가)

  • Kang, Bok-Hyun;Kim, Tae-Bum;Kim, Ki-Young
    • Journal of Korea Foundry Society
    • /
    • v.32 no.3
    • /
    • pp.133-137
    • /
    • 2012
  • Chill vent has a zigzag venting path which allows residual air or gases to exhaust out very quickly from the die cavity. However molten metal sometimes comes out through the gas venting surfaces causing flash. Effect of designing factors of chill vent and processing variables in high pressure die casting on the performance of chill vent was investigated through a series of calculations by using a commercial code. The most influential factor was the thickness of chill vent, followed by inlet velocity, vent width and die temperature.