Method and apparatus for determining the cooling action of a flowing gas atmosphere on workpieces
AssigneeALD Vacuum Technologies GmbH
InventorKalus Loeser
Life of this patent
Estimating the term…
Abstract
Method and apparatus for determining the cooling action of a flowing gas atmosphere on workpieces by a measuring body with at least on temperature sensor and heated to workpiece temperature and is exposed to the gas atmosphere. The method and apparatus are particularly useful in hardening steel.
Claims18
A method for determining the cooling action of a flowing gas atmosphere on workpieces heated in a heating chamber to a predetermined temperature comprising:
- a) heating a measuring body positioned in a quenching chamber and comprising a temperature sensor to a given starting temperature corresponding to the same temperature as that of the workpieces, wherein
- b) the measuring body is exposed to the gas atmosphere circulating through the workpieces in the quenching chamber, wherein
- c) said measuring body is disposed stationary outside of the workpieces and is heated by a heating device associated with it to said given starting temperature and is then exposed together with the workpieces to the flowing gas atmosphere;
- and
- d) measuring the cooling time curves measured by the measuring body, whereby the quenching gas chills both the batch and the measuring body.
An apparatus for determining the cooling action of a flowing gas atmosphere on workpieces, which have been heated in a heating chamber, comprising a measuring body, which is heated to workpiece temperature and provided with at least one temperature sensor, and which is disposed in a quenching chamber, wherein the measuring body, fixedly disposed outside of the workpieces, is directly associated with a heating device of its own connectable to a power source, by means of which the measuring body can be heated to a presettable starting temperature, and wherein the measuring body is disposed in the flow path of the gas flow which can be guided over the workpieces.
Dependencies are inferred from the claim text.