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Title: |
1921 Article-Southwark Foundry & Machine Co., Gray's Turret Rotary Shear |
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Source: |
Machinery, V28, Oct 1921, pg. 166 |
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Insert Date: |
6/26/2016 9:30:20 PM |
A product of the Southwark Foundry & Machine Co., Philadelphia, Pa., known as Gray's turret rotary shear was described in Machinery for June, 1920. The principles of design and operation embodied in this machine have been incorporated in three new sizes of rotary shears recently developed by this company. These machines are adapted for cutting any shape of opening in sheet metal without cutting in from the edge and without turning the sheet, this method of cutting sheets and plates being made possible by mounting the rotary cutter on a turret which can be moved to any angle through a full circle while the cutting action is in process.
On the new No. 0 shear, which is the smallest of the four sizes, only the lower cutter is driven. This machine is designed primarily as a hand-driven machine, although power can be applied. On all sizes larger than the No. 0 machine both cutters are power-driven. The special feature of the largest or No. 3 machine, which is here illustrated, is the mounting of both the upper and lower cutters on adjustable turrets. This machine has a capacity for cutting any thickness of plate up to 3/8 inch. Both the upper and lower cutters are set at an angle, and they keep the same relative positions at any degree of the circle to which they may be turned. Hand-wheels for revolving the turrets are provided on both sides of the machine, so that the operator can control the machine from either side. The cutting speed of this machine is 10 feet per minute, and the throat depth 36 inches. Only 3 horsepower is required for driving.
The No. 2 machine has a capacity for cutting sheet metal of any thickness up to No. 8 gage, with a cutting speed of 10 feet per minute. The throat depth of this machine is 30 inches. The No. 1 machine will cut sheet metal up to No. 14 gage, and has a throat depth of 30 inches. The smallest or No. o machine will cut up to 16 gage, and has a throat depth of 18 inches. Special machines of larger sizes can be built to shear plates up to 1 inch in thickness. The lighter models of the turret rotary shear are employed to cut such parts for automobiles as aprons, pans, tanks, mud guards, flanges, fenders, radiators, etc. In general sheet-metal work they are employed to cut elbows, tees, hoods, oil-pans, parts for ventilator systems, etc. The heavier models are employed to shear plates used in building ships, locomotives, boilers, etc., and in structural and ornamental iron work.
U. S. Patent #1,656,323.
http://datamp.org/patents/displayPatent.php?id=54940 |
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1921 Southwark Foundry & Machine Co., Gray's Turret Rotary Shear
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