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Calumet & Hecla - Wolverine Tube Division

Metal Trade, Copper Industry and Trade, Manufacturing Process, Manpower, Labor, Skilled Labor Rotary Reheat Furnace is designed to bring the block up to a predetermined extrusion temperature. The furnace is gas fired and the blocks are heated in an atmosphere from which all free oxygen has been removed. The furnace is controlled by the panel shown at the left of the picture.

Scanned: September 28, 2009


Calumet & Hecla - Wolverine Tube Division

Metal Trade, Copper Industry and Trade, Manufacturing Process, Manpower, Labor, Skilled Labor Extrusion Press - Close up view of the press. A heated block has just passed along the track at the bottom of the picture and has been dropped into the container. The pin has started to enter the block and will be followed by the head causing the hot metal to be forced through the die and over the pin, which is travelling slowly through the center of the die at the bottom of the container, and to merge in the shape of a tube.

Scanned: October 6, 2009


Calumet & Hecla - Wolverine Tube Division

Metal Trade, Copper Industry and Trade, Manufacturing Process, Manpower, Labor, Skilled Labor 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 After the entire billet has been pierced and the tube is on the mandrel rod, the rod is withdrawn and the tube removed from the mill by an ejector mechanism which carries it down a roll conveyor and into a quench bath.

Scanned: October 6, 2009


Calumet & Hecla - Wolverine Tube Division

Metal Trade, Copper Industry and Trade, Manufacturing Process, Manpower, Labor, Skilled Labor Base Tube Inspection - Base Tubes are inspected for both surface defects and dimensions.

Scanned: October 6, 2009


Calumet & Hecla - Wolverine Tube Division

Metal Trade, Copper Industry and Trade, Manufacturing Process, Manpower, Labor, Skilled Labor Large Drawbench - Photo showing a view of the head of one of the larger of the draw benches in the mill.

Scanned: October 6, 2009


Calumet & Hecla - Wolverine Tube Division

Metal Trade, Copper Industry and Trade, Manufacturing Process, Manpower, Labor, Skilled Labor Sawing To Length - Tubes which have been drawn to the finished size are being cut on band saws to the finished length.

Scanned: October 6, 2009


Calumet & Hecla - Wolverine Tube Division

Metal Trade, Copper Industry and Trade, Manufacturing Process, Manpower, Labor, Skilled Labor Final Inspection - Inspector is examining the inside surface, of the length of coiled tubing. He has made an angle cut, and depending on its appearance will pass the tube on for further handling or reject it. He has been trained to lift the tube away from the saw in such a way as to prevent saw chips from falling inside the tubing.

Scanned: October 6, 2009


Calumet & Hecla - Wolverine Tube Division

Metal Trade, Copper Industry and Trade, Manufacturing Process, Manpower, Labor, Skilled Labor Annealing Furnace - Copper. The atmosphere through which the tubes are passed in the furnace is known as "reducing", that is, it contains no free oxygen. As the tubes are brought up to the annealing temperature there is no possibility of oxidation and subsequent discoloration of the surface.

Scanned: October 12, 2009


Calumet & Hecla - Wolverine Tube Division

Metal Trade, Copper Industry and Trade, Manufacturing Process, Manpower, Labor, Skilled Labor Cleaning and Washing Department - here are located vats containing various cleaning solutions used to remove discoloration introduced by brazing operations. Lubricant and grease which may coat the part as a result of handling or processing are removed in the vapor-degreaser which is located at the left center. An extremely volatile solvent is vaporized by passing over steam heated coils, and the parts to be cleaned immersed in this atmosphere. A cooling section at the top of the unit condenses the solvent where it drops back to the bottom of the tank.

Scanned: October 9, 2009


Calumet & Hecla - Wolverine Tube Division

Metal Trade, Copper Industry and Trade, Manufacturing Process, Manpower, Labor, Skilled Labor Pressure Testing - Photo of one of the test racks used in processing of dehydrated and sealed coiled refrigeration tubing. After the inside diameter of the coil is inspected, one end is sealed with a crimp. It is then placed on a rack and the open end inserted into one of the six fixtures shown. A pressure of 250 lbs. per sq. inch of dehydrated air is put into the coil and it is pushed below the surface of the water. By this method leaks are readily detectable. The coil is then removed, the other end crimped in a manner similar to the first, leaving the inside diameter dry and clean for the eventual consumer.

Scanned: October 9, 2009