Production method for a tool socket

US10232499B2 · kind B2 · utility

Assignee

• Hilti Aktiengesellschaft · LI

Inventors

• Ralf Meixner · Germaringen, DE
• Manfred Schallert · Bendigo, AU
• Michael Bischof · Kirchheim unter Teck, DE
• Jens Kondratiuk · Buchs, CH

Key dates

• Filing date: Dec 9, 2014
• Grant date: Mar 19, 2019
• Expiry date: Nov 5, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B25D2250/301
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A production method for a tool socket includes forming a hollow spindle An elongated recess is provided in the wall. The spindle includes unalloyed or low-alloyed steel grades. An insert includes a high-alloyed tool steel. The insert has a pedestal that is complementary to the recess and it also has a rib. The insert is placed into the hollow spindle in such a way that the pedestal rests in the recess and the rib projects into the interior of the spindle. The pedestal is soldered into the recess at a temperature that is above the Ac3 temperatures of the steel grades employed. The combined structure is cooled and then undergoes a heat treatment in an atmosphere containing sufficient carbon to carburize the hollow spindle but not sufficient to carburize the insert. The heat treatment of the combined structure is carried out at a temperature between 800° C. and 950° C. The combined structure is cooled down in a salt bath or liquid bath subsequent to the heat treatment.