Method for using a die holder with centering and squaring guide to cut threads on a cylindrical workpiece
OwnerWilliam D. Hermstedinventor
Life of this patent
Estimating the term…
Abstract
A method for using a die holder with centering and squaring guide to cut preliminary and final threads on rotatable stationary workpieces is provided and includes a locating pin, a die with set screw, a shim, a die holder with two lock screws, a guide, three bolts, a guide bushing and a gage. The guide bushing presents alot more surface area to guide the workpiece into the die and which holds the workpiece absolutely square to the die throughout operation of making a machine quality thread on the workpiece.
Claims4
A method for cutting preliminary threads on a rotatable cylindrical workpiece which comprises:
- (a) opening carefully a threading die until a smaller diameter end of a locating pin can just slip into the die and then inserting the end of the pin into the die;
- (b) adjusting a set screw in the die with a screwdriver for a snug fit with the locating pin;
- (c) removing the locating pin from the die;
- (d) inserting a shim into a die holder if necessary;
- (e) inserting the die into the die holder;
- (f) tightening two lock screws in the die holder with an allen wrench so as to lock the die in place;
- (g) placing a guide over the die holder;
- (h) assembling loosely the bolts through the guide and into three securing die holder so that the guide floats on the die holder;
- (i) inserting a guide bushing into the guide;
- (j) inserting the locating pin into the guide bushing so that the locating pin slips into the die;
- (k) tightening the three bolts with the allen wrench so as to secure the guide to the die holder;
- (l) withdrawing the locating pin from the guide bushing;
- (m) clamping the die holder in a vise;
- (n) inserting a cylindrical workpiece through the guide bushing and into the die;
- and
- (o) rotating the cylindrical workpiece with a wrench so as to cut the preliminary threads on the workpiece.
A method for cutting preliminary threads on a stationary cylindrical workpiece which comprises:
- (a) opening carefully a threading die until a smaller diameter end of a locating pin can just slip into the die and then inserting the end of the pin into the die;
- (b) adjusting a set screw in the die with a screwdriver for a snug fit with the locating pin;
- (c) removing the locating pin from the die;
- (d) inserting a shim into a die holder if necessary;
- (e) inserting the die into the die holder;
- (f) tightening two lock screws in the die holder with an allen wrench so as to lock the die in place;
- (g) placing a guide over the die holder;
- (h) assembling loosely three securing bolts through the guide and into the die holder so that the guide floats on the die holder;
- (i) inserting a guide bushing into the guide;
- (j) inserting the locating pin into the guide bushing so that the locating pin slips into the die;
- (k) tightening the three bolts with the allen wrench so as to secure the guide to the die holder;
- (l) withdrawing the locating pin from the guide bushing;
- (m) inserting each of a pair of elongated handles into an opposite side of the die holder;
- (n) clamping a cylindrical workpiece in a vise;
- (o) positioning the cylindrical workpiece to extend through the guide bushing and into the die;
- and
- (p) rotating the die holder by the handles so as to cut the preliminary threads on the workpiece.
Dependencies are inferred from the claim text.