Method for manufacturing cold-forged wing nuts
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United States of America Patent
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May 17, 2005
Grant Date -
Nov 25, 2004
app pub date -
May 19, 2003
filing date -
May 19, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for manufacturing cold-forged wing nuts is to have a column linear material rolled and compressed into lots of column material units connected continuously and then receiving the steps of shearing, flattening, compressing and trimming, punching, wing forming and threading, able to produce wing nuts with quickness and with less waste material, and also having standardized specifications and high strength as well as property of corrosion resistance. Besides, one more step of forming insert grooves is added between the step of flattening and the step of compressing and trimming, so that the column with wings material unit can be formed with insert grooves, and after finishing the steps of punching, wing forming and threading, a nylon or metallic sheet is inserted in the insert groove and fixedly riveted to produce a wing nut able to prevent loosening under a low or high temperature.
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