Order Processing and Manufacture
Shear blade being straightened
All machine knife orders are subjected to our thorough order review. This considers all available information including that specified on the order and quotation. This is then checked against specifications contained in SBT’s database of over 1500 different shear blades we have manufactured previously.
Our manufacturing specification considers the material types, strength and thickness to be sheared, maximum shearing capacity of the machine, type of machine and any work piece temperature considerations.
We will then produce a metallurgical program to heat treat the chosen tool steel to provide the required balance between wear resistance and toughness and give optimum shear blade performance.
Process temperature control and hardness checks at each stage of the hardening process ensure this vital stage is actioned correctly. The type of tool steel is the beginning of this process and final hardness is the end but the intermediate parameters can have a major influence on blade properties and performance.
The tool steel will be supplied to us with a certificate of chemical analysis and machined into a blank of appropriate dimensions. Holes, countersinks, keyslots, threads and other details are CNC machined prior to the blade being heat treated.
Precise straightening is performed before finish grinding gives dimensional accuracy to the blade. Next the blade is inspected, measurements retained for our records and threads cleaned out.