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Cutting speed may be defined as the rate at the workpiece surface, irrespective of the machining operation used. A cutting speed for mild steel of 100 ft/min is the same whether it is the speed of the cutter passing over the workpiece, such as in a turning operation, or the speed of the cutter moving past a workpiece, such as in a milling operation.
This makes metal cutting somewhat different (in its mechanics) from slicing softer materials with a blade. The milling process removes material by performing many separate, small cuts. This is accomplished by using a cutter with many teeth, spinning the cutter at high speed, or advancing the material through the cutter slowly; most often it is ...
While it is known that these female missionaries taught the indigenous women how to sew, it is not certain that they taught them the craft of quilting or making bed coverlets. The appliqué style of tivaevae quilting appears to have been influence by Pennsylvanian German scherenschnitte or Victorian folded paper-cutting traditions. [6]
An electrical discharge machine. Electrical discharge machining (EDM), also known as spark machining, spark eroding, die sinking, wire burning or wire erosion, is a metal fabrication process whereby a desired shape is obtained by using electrical discharges (sparks). [1]
Machine quilting needles are very sharp in order to readily pierce layers of quilt and properly sew together the quilt top, batting and backing. Hand quilting needles are traditionally called betweens and are generally smaller and stronger than normal sewing needles. They have a very small eye which prevents any extra bump at the head of the ...
Paper quilling. Quilling is an art form that involves the use of strips of paper that are rolled, shaped, and glued together to create decorative designs. The paper shape is manipulated to create designs on their own or to decorate other objects, such as greetings cards, pictures, boxes, or to make jewelry.
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