I have no experience of thread rolling.
I want to know how to inspect thread rolling.
Material : stainless steel
Tensile strength : over 1070Mpa
Is it mandatory to inspect flaw using NDT?
2. grain flow
Is it mandatory to inspect grain flow?
How to inspect grain flow?
What is the criteria for inspection?
Is grain flow important to thread rolling?
===================#1 The inspection requirements are what every your customer
says these are.
#2 Check the purchase order and hope you did not quote an
aircraft [type] part without realizing that
certification/inspection generally runs 2X-3X more than the part
#3 Contact the manufacturer of your thread roller. They will
generally provide a considerable amount of background and
#4 As a general hint -- rolled threads won't look like cut
threads. Don't make perfect crest threads unless you must as the
strain on the rolls/machine is much higher. Imperfections on the
crest does not affect the strength. Also use the rounded root
option if you can. The rolls will wear out quicker making flat
bottons/square corner roots and will rapidly wear to the rounded
Good luck and if you can provide the make of thread roller,
roller die manufacturer, material specs, processing specs
[speeds] and threads you are rolling we can give you more
specific information such as oil, and other tips.
There is something to be said for government by a great aristocracy
which has furnished leaders to the nation in peace and war for generations;
even a democrat like myself must admit this.
But there is absolutely nothing to be said for government by a plutocracy,
for government by men very powerful in certain lines and gifted with the "money
but with ideals which in their essence are merely those of so many glorified
Theodore Roosevelt (1858-1919), U.S. Republican (later Progressive) politician,
president. Letter, 15 Nov. 1913.
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