Girard Associates, Inc. & Girard Engineering, Inc. - Cleveland, Ohio - Forging and Industrial Controls / Enclosures

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How the bars and feed cut off

Feed Rolls

The Hotmatic feed rolls pull in the bars in step with the forming cycle, descaling the metal as they do so. They grip the hot bars coming out of the induction coils and feed them intermittently against the bar stop at the shearing station.

As an added bonus, the rolls' squeeze loosens the scale. When the bars enter the machine, they are almost free of scale. The rest flakes off during cut-off and pre-forming

The AMP 20S has one pair of feed rolls. Gripping pressure is applied by pneumatic cylinders.

The AMP 30S has two pairs of feed rolls to provide enough pull for larger bar sizes. Two air cylinders operated from the control desk open and close the rolls. Gripping pressure is adjustable.

Feed Rolls -- Examination

THE DISTANCE BETWEEN THE LAST INDUCTION COIL AND THE CUTTING STATION IS SHORT -- THE METAL HARDLY LOSES ANY HEAT ALONG THE WAY

TO MINIMIZE DISTORTION DURING CUT-OFF, THE CAM-CONTROLLED GRIPPER JAW CLAMPS THE BAR AGAINST THE STATIONARY CUTTER BLADE.

Drive Mechanism

To protect the drive mechanisms for the cutter slide and gripper slide against heat, scale and cooling water, they are sheltered in a closed, sealed housing outside of the tool area.

Shearing System:

The shearing system cuts consistently accurate blanks. The accuracy of the finished part depends on the accuracy of the sheared blank. That's why the bar is clamped against the stationary cutter blade in the die block during cut-off by a cam-controlled gripper jaw. This minimizes distortion of the blank by the pressure of the cutter blade.

Result: the clean, square blanks you need for close-tolerance forming.

Shearing is done by a cam-controlled cutter slide. It slices off the blank and carries it right to the first forming station. A spring-loaded finger holds the blank during transfer. The holding finger opens when the punch pushes the blank into the die.

Cut-off length and feed length can be adjusted during production.

Bar ends are ejected immediately after cut-off -- before they can reach the dies. The ESA-control lets them drop clear.

THE BAR RUNS AGAINST THE BAR STOP, WHICH DETERMINES CUT-OFF LENGTH, AND IS THEN CUT BY THE MOVING AND STATIONARY BLADES. THE SHARED BLANKS ARE TRANSFERRED RIGHT TO THE FIRST DIE.

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