Thermal controlled mandrel with replaceable tip for copper and brass extrusion
US5687604A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 1996 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | May 30, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21B25/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An improved cooling system is provided in a piercing mandrel used in extruding tubular material made of metals having extruding temperatures above the annealing temperature of H13 tool steel such as brass, copper and the like. The piercing mandrel has a replaceable tip fitted on the end of the stem portion for the mandrel. A cooling channel system is provided at the distal end of the stem and comprises a disperser for dispersing cooling fluid in equi-distant, multi-radial directions as the cooling fluid flows out of the stem distal end. An annular channel is provided at the perimeter of the mating faces of the bore in the tip and the stem distal end and which is in communication with the disperser to direct radially cooling fluid annularly of the perimeter of the mating faces at the stem distal end. The cooling channel system further comprises about the perimeter of the stem distal end a plurality of equi-distant, longitudinally directed channels which are in communication with the annular channel. Cooling fluid flows from the annular channel longitudinally of the tip along the longitudinal channels. The stem distal end has a cooling fluid outlet device for collecting cooling fluid…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.