Process and a device for the production of grooves on a wall of revolution
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United States of America Patent
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Jun 13, 1989
Issued Date -
N/A
app pub date -
Aug 31, 1988
filing date -
Jan 23, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The process according to the invention relates to the production of grooves such as helical threads on the wall of tubes composed of ductile or plastic materials without removal of matter. It involves using a knurling tool (11) of radius (R.sub.1) which is freely rotatable about an axis (X.sub.3). This axis covers, in the direction indicated by the arrow F2, a determined closed curve (12) which, in the figure, is a circumference of radius (R2) and of axis (X.sub.4). The enveloping curve of the path of the shaping edge (15) of the knurling tool has a region of intersection (13) with the wall of revolution (10) of axis (X.sub.2). The diameter of the knurling tool is greater than the diameter of the circumference (12). A helical thread is obtained by moving the wall of revolution (10) in relative manner along its axis (X.sub.2) relative to the knurling tool (11).
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