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2 Advances in Science and Technology. Research Journal

2 2020

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Mechanical and Thermal Stresses in an HPDC Machine Plunger During the Dosing and Filling Process

Jankowski Jacek, Kołakowski Dariusz, Pisarek Bogusław Piotr

Advances in Science and Technology. Research Journal

2020

Vol. 14, no 2

1--12

Distributions of mechanical and thermal stresses in a plunger of the high pressure die casting machine with a horizontal shot sleeve have been considered for a flat thermal stationary problem. An axial pressure of the plunger pressing in the technological process has been accounted for as well. Principal and equivalent stresses have been determined within two different hypotheses on the strength of materials, including one theory covering various allowable stresses in tension and compression. Four plunger material variants have been analysed.

Analysis of Mechanical and Thermal Stresses in a Pressure Casting Machine Plunger

Jankowski Jacek, Kołakowski Dariusz, Pisarek Bogusław Piotr

Advances in Science and Technology. Research Journal

2020

Vol. 14, no 1

209--223

The study discusses the thermo‑mechanical stress distribution in the plunger of a cold chamber casting machine with a horizontal casting chamber in the stationary aspect. The main stresses as well as the reduced stresses were determined for four different strength hypotheses, two of which took into account different acceptable maximal tensile and compressive stresses. For comparative purposes, the calculations were performed for three different construction materials used for cold chamber pressure machine plungers: grey pearlitic cast iron, high silicon bronze and beryllium bronze, as well as one more type of bronze, which has not been used for plungers so far, i.e. aluminium‑iron‑nickel bronze, constituting the initial alloy for the newly‑developed complex bronzes with high wear resistance and elevated strength.