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US 8,003,912 B2Granted
Method for manufacturing a machine housing having a surface-hardened fluid chamber
AssigneeBrinkmann Pumpen K. H. Brinkmann GmbH & Co. KG
InventorPeter Wagner
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Abstract
Method for manufacturing a machine housing having a fluid chamber (14) with a hardening layer (16) on an internal wall surface, in which the hardening layer (16) is made of a material, that, per-se, is not electrically conductive but has been made conductive by additives, and in that the surface of the hardening layer (16) is machined by electro-discharge machining.
Claims10
Method for manufacturing a machine housing having a fluid chamber with a hardening layer on an internal wall surface, comprising the steps of:
- making the hardening layer of a material, that, per-se, is not electrically conductive but has been made conductive by additive,
- forming the hardening layer by a shell having an interior of which is subdivided into at least two chambers having a circular cross section, an interior of the chambers being subdivided by a cross formed of the material of the shell,
- machining the surface of the hardening layer by electro-discharge machining,
- mechanically finishing internal surfaces of these chambers after said electro-discharge machining, and,
- then, removing the cross.
2 more elements
Dependencies are inferred from the claim text.