Advent Form Tool

One of the obvious features of Advent Tool's thread mill designs is the long length present in the insert.  With ground surfaces throughout, the operators can be assured of excellent repeatability and location time and time again.  Because inserts line up with each other so well with little preparation, we can develop form tools that are high performance, precise and can be reground by their respective parties.  Another great example is a yoke form we needed to generate in a high production environment at a high production automotive account named Accurate Gauge & Manufacturing in Rochester Hills, MI. 

In the bore(s) through the ears, the form calls for a chamfer on either side of the bore and an 'injection ring groove' for the injection of plastic later - during the assembly of the yoke and the universal joint.  Being able to generate all of these forms at once had clear advantages, with a reduction in cycle time being the most obvious.  Advent tackled the problem with one half of a 1.5" long standard insert blank (410A Class).  The form was duplicated on the other half of the insert, for two forms per insert (See picture, left).  Using a standard .978" Diameter tool, tool changes were reduced from two to one and tool life was increased dramatically to 6,000 parts per edge utilizing high pressure coolant through the tool.  In addition, speeds and feeds were elevated to 'milling mode' @ 512SFPM, .0083" Chipload/Tooth & 50IPM measured at the center of the spindle.  Tool life is nothing short of spectacular at over 5,000 holes per insert.