Title: Calumet & Hecla - Wolverine Tube Division
Photographer: Unknown
Subject Headings: Metal Trade - Copper Industry and Trade, Manufacturing Process, Manpower - Labor - Skilled Labor
Condition: Good
Description: Piercing Mill - Known as piercing, in this process approximately 50" long billets are heated in a furnace. The hot billet is discharged from the heating furnace into the trough behind the piercing mill and forced hydraulically between two rollers which rotate the billet at a speed previously determined as the most efficient. This causes the hot billet to travel forward and over a point which helps to produce and dresses the inside diameter of the base tube. After the entire billet has been pierced and the tube is on the mandrel rod, the rod is withdrawn and the tube removed from the mill by an ejector mechanism which carries it down a roll conveyor and into a quench bath.
Source of Description: Pictorial Description
Institution: Michigan Technological University Archives and Copper Country Historical Collections
Donor: Universal Oil Products
Date of Photo: 1940's
Medium: still image
Color: black and white
Size: 20.2 cm x 24.9 cm
Polarity: Positive
Image No: MS003-003-002-12
Collection Name: Calumet and Hecla Photograph Collection
Terms of Use: Rights to reproduce and distribute this image may be restricted. Contact the Michigan Technological University Archives and Copper Country Historical Collections for further information.
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