Study and Establishment of Manufacturing Process of Molybdenum Liners Using Warm Flow Forming Process

Abstract

Liners used in shaped charge help in achieving deeper penetration in target material. The penetration potential is directly proportional to square root of liner material density and maximum jet length. Studies reveal that molybdenum finds great potential for use as liners owing to its high sound speed and relatively high material density. The high sound speed helps in achieving high-velocity coherent jet tips which are important to attain higher jet length. The process of precise manufacturing of molybdenum liners is challenging. In this paper, warm flow forming has been attempted for the same, as molybdenum is difficult to form by cold working. Effect of warm working of the molybdenum material is studied. Design of blank and pre-form along with Press tools for making pre-form, rollers, mandrels, and tailstock support has been brought out. The process parameters such as speed and feed used in the process are explained in brief.