How to buy Precision Casting Parts

The ordering of precision casting parts takes a certain amount of time and energy to qualify a potential supplier foundry.To acquire the best value from the precision casting parts also requires a cooperative effort on the part of the customer and the supplier foundry from the early stages of the design through to the end manufacturing process.Good planning ahead of time will pay dividends for both you and your supplier foundry.

Design of precision casting parts

Precision casting parts are generally furnished with un-machined as-cast surfaces,unless otherwise specified.To take advantage of the precision casting parts process,the supplier foundry should also know which surfaces are to be machined and where datum points are located.The acceptable dimensional tolerances must be indicated when a drawing is provided.Tolerances are normally decided by agreement between the supplier foundry and customer.Close cooperation between the customer's design engineers as well as the supplier foundry is essential to optimize the precision casting parts design.

Material specifications of precision casting parts

Mechanical properties may be verified by the use of test bars cast either separately or attached to the precision casting parts.The mechanical properties obtained represent the quality of the steel,but do not necessarily represent the properties of the precision casting parts themselves,which are affected by solidification conditions and rate of cooling during heat treatment,which in turn are influenced by casting thickness,size and shape.In particular,the harden ability of some grades may restrict the maximum size at which the required mechanical properties are obtainable.Short of destructive testing of an actual casting sample,the use of a test bar is the best measure of the steel quality.