Effect of Amount of Fuel for Punchability in Punchless Impact Punching by Compression Ignition

Abstract

In this study, punchless punching by the compression ignition of octane and the effect of varying the amount of fuel on punchability were investigated. In the experiment, the compression in compression ignition was applied using a drop hammer. As the amount of fuel increased, the variation in the initial height of the hammer required for completing the piercing could be divided into the following four parts of the basis on the amount of fuel. In the first part, corresponding to the smallest amount of fuel, the height exhibited a large decrease. In the second part, the height decreased by a small amount. In the third part, the height increased. Finally, in the fourth part, corresponding to the largest amount of fuel, the height remained constant. The four parts were believed to be caused by differences in the chemical reactions. Moreover, the optimum amount of fuel for punching was the largest amount of fuel under the conditions of the first part.

Best Papers Awarded by JILM and JSTP in <i>Materials Transactions</i>

“…Articles of 10-20 are annually published through JSTP in Materials Transactions: for example, 16 articles in 2021-2022. 4,5,[94][95][96][97][98][99][100][101][102][103][104][105][106][107] The awarded paper of Takahashi et al 1,60) through JILM is concerned with measurements of interdiffusion and impuritydiffusion coefficients in multicomponent Ti alloys, which are fundamental quantities to understand phenomena occurring at elevated temperatures. Indeed, comprehensive study was presented on the Ti-Al-Zr ternary system following their earlier studies on the Ti-Al-X (X = V, Cr, Fe, Co) ternary systems.…”