High accuracy measuring device for measuring large mass

A measuring device for measuring the mass of a weight, comprising:

• a main frame,
• a main beam supported on the main frame and comprising a central knife and two side knives parallel with the central knife,
• a balancing system loaded on one end of the main beam and comprising a set of counterweights,
• a weighting system loaded on the other end of the main beam,
• a weight transportation system capable of transporting and loading a standard weight or a test weight into the weighting system and capable of unloading and transporting them away from weighting system, and
• a control system,
• wherein the central knife and the two side knives are made from metal with a high temperature-cryogenic cycling process,
• wherein the central knife and the two side knives is configured to be adjusted in parallelism with a three-coordinates measuring machine,
• wherein the control system is adapted to control the balancing system and the weighting system to synchronously load or unload the balancing system and the weighting system, and the metal comprises cemented carbide powder as raw material, the central knife and the side knife experience a pre-heating process, a quenching process, multiple tempering processes, a stepped deep cooling process and a final tempering process successively during the high temperature-cryogenic cycling process, and
• wherein the balancing system having at least one balancing motor and the weighting system having at least one weighting motor for the synchronous loading and unloading, of the balancing system and the weighting system.