摘要:

This paper deals with die casting from the design and production viewpoints. The general sequence of operations is described. Shrinkage allowance, venting, elimination of porosity, and the use of inserts are among the factors considered. The discussion includes references to the maximum casting weight and number of shots per hour, the materials used for die cores and castings, the effect of shrinkage stresses between casting and die, the dimensional accuracy of castings, ejection of castings from the die, and the problem of small quantity die casting.

DOI:10.1049/jipe.1941.0010

出版商:IProdE    

年代:1941

数据来源: IET

摘要:

This paper describes the most common machines used in the production of punches and dies. The general principles and applications of the various machines are dealt with, particular attention being given to the Keller automatic copying machines. Examples of punch and die making, using various machines, are described in detail. The discussion deals with materials and production times for die castings, includes further details of punch and die production, and ends with a reference to less conventional dies used for sheet metal pressing.

DOI:10.1049/jipe.1941.0012

出版商:IProdE    

年代:1941

数据来源: IET

摘要:

This article suggests substitution of processes as a means of releasing machining capacity and thus relieving the acute shortage of machine tools, small tools and relevant toolroom capacity. The principles of substitution, including modification of design and reconstruction of production layout to reduce or eliminate machining processes, are illustrated by a number of examples. These examples of the use of pressing, die-casting, welding, etc., as substitute processes form part of an unlimited range of possibilities with which resourceful and experienced production engineers can meet the present emergency.

DOI:10.1049/jipe.1941.0014

出版商:IProdE    

年代:1941

数据来源: IET