Low-cost alloy answer to workholding problems

Citation

(2001), "Low-cost alloy answer to workholding problems", Aircraft Engineering and Aerospace Technology, Vol. 73 No. 2. https://doi.org/10.1108/aeat.2001.12773bad.017

Low-cost alloy answer to workholding problems

Low-cost alloy answer to workholding problems

Keywords Mining and Chemical Products, Alloys, Casting

Mining and Chemical Products has formulated two low-melting-point alloys for casting purpose-made chucks for workholding awkwardly shaped components.

MCP explains that melting at 137°C and 220°C, the bismuth-based alloys are designed to ensure the molten flowability essential for maximum surface pickup on irregular and complex workpiece profiles. We are also informed that with their low melting temperature, they can be safely cast against the full range of production materials, from metals to heat-sensitive plastics, rubber and wood.

It is also confirmed by MCP that since neither alloy shrinks on solidification, the customised chucks achieve an exceptionally secure grip on the workpieces. When they are no longer needed, they can be melted down for recovery of the alloy, an economy not available with other workholding media.

MCP says that the chuck-making process is quick and cheaper than producing special workholding fixtures. A set of chuck jaws is cast in two stages against the workpiece using ordinary bench equipment. When they have solidified, the jaws are incorporated into a vice.

Jaws can reportedly be cast and put into service in an hour or less. They are believed to be generally strong and durable enough to withstand long production runs before wear and tear necessitate replacement.

Details are available from: Mining and Chemical Products Ltd, Whitchurch, UK. Tel: +44 (0)1256 897200.