Drawing Dies In Our Life

In general, drawing dies are refers to various mold of drawing metal wire and fiber drawing die. All of drawing dies center have their own a special shape. Such as hole, round, square, star anise and other special shapes.

When the metal pulled through the hole, its size become small and even its shape has been changed. Steel wire is usually adopt tungsten carbide nib. The typical structure of this mold is a carbide mold core with cylindrical, there is bell, entrance cone, deformation cone in the inner hole of a mold core.

Drawing dies are widely used in many fields. Such as radar, television, instrument, aerospace and electronic devices. Production process of wire drawing die insert sleeve includes pressing die, draft, cutting and other process steps.

Drawing die is made of metal wire. With a kind of mold, the metal wire changed from coarse to fine, until it reach the required size. Mold core of drawing die is often made by natural diamond and synthetic diamond. Copper wire drawing die is belongs to the cord drawing die. Drawing dies also includes carbide drawing die,  plastic drawing die and diamond drawing die.

Article From: http://www.ls-carbide.com/blog/?p=82

Choose Steel For Cold Heading Dies

A lot of fasteners are formed by cold heading dies. The cold heading dies have been born violent punching loads. The concave die surface is under high stress. So the high stress could offset the stress which produced during the cold heading process.

Generally speaking, cold heading dies which used for small quantities of workpiece usually choose carbon tool steel or low alloy cold die steel. The mold cavity surface must be done local quenching. And making the hardness of cavity surface reach to HRC60. But the die central should reach to the range from HRC35 to HRC45. Certainly people would choose die steel by its section size. Besides it owns hardenability. Too shallow hardened layer is easy to result in cavity collapse. On the contrary, too deep hardened layer may make the die cracking.

Some cold heading dies need long service time. These one are often adopt high alloy die steel or high speed steel. In order to make the die could bear high impact load, we can use combined die structure. Cold heading dies with high hardness are made of die material which is in high alloy. Making cold or hot pressing method inserts into the outer sleeve. Then they will be contacting closely.