Gage for determining the true dead center of a workpiece on a lathe or milling machine from each tool pocket in the machine tool turret or cross slide
First Claim
1. A gage for determining the true dead center of a workpiece on a lathe or milling machine comprised of:
- a chuck, said chuck has one end of a metal stock inserted inside said chuck, wherein said metal stock is secured inside said chuck by a plurality of expanding and retracting radial arms of said chuck;
a tail stock center, said tail stock center has a pointed end for being inserted into a small pilot hole drilled into a center of an opposite end of said metal stock;
an adjustable tool carriage, said adjustable tool carriage is located on a bed of said lathe and provides a base for a tool holder, wherein said tool holder has a tool holder pocket formed inside said tool holder;
a gage, said gage is of a linearly elongated configuration formed of two ends with one end removably inserted and secured within said tool holder pocket of said tool holder, said one end is opposite a branched, angular end with an upwardly sloping surface opposite a downwardly sloping surface, said gage is made from any material which is stiff and capable of being machined to close tolerances;
a plurality of pre-cut shims, said shims being supplied in generous quantities with said gage; and
a feeler gage, said feeler gage measures gaps in thousandths of an inch.
0 Assignments
0 Petitions
Accused Products
Abstract
This invention is a gage for aiding a lathe or milling machine operator in determining whether the centerline of the lathe tool is in alignment with the workpiece. The gage is inserted in the lathe tool holder and pressed against a test bar installed in the lathe. If any gap exists between the test bar and one of the sloping surfaces on the front face of the gage, the gage and test bar centerlines are not in alignment. The gap is equal to the variation between the centerlines because of the geometric relationship established between the angle between the sloping front surfaces and the test bar. This gap is measured with a conventional automotive type feeler gage and the lathe tool is adjusted vertically by this amount using pre-cut shims supplied with the gage.
19 Citations
10 Claims
-
1. A gage for determining the true dead center of a workpiece on a lathe or milling machine comprised of:
-
a chuck, said chuck has one end of a metal stock inserted inside said chuck, wherein said metal stock is secured inside said chuck by a plurality of expanding and retracting radial arms of said chuck;
a tail stock center, said tail stock center has a pointed end for being inserted into a small pilot hole drilled into a center of an opposite end of said metal stock;
an adjustable tool carriage, said adjustable tool carriage is located on a bed of said lathe and provides a base for a tool holder, wherein said tool holder has a tool holder pocket formed inside said tool holder;
a gage, said gage is of a linearly elongated configuration formed of two ends with one end removably inserted and secured within said tool holder pocket of said tool holder, said one end is opposite a branched, angular end with an upwardly sloping surface opposite a downwardly sloping surface, said gage is made from any material which is stiff and capable of being machined to close tolerances;
a plurality of pre-cut shims, said shims being supplied in generous quantities with said gage; and
a feeler gage, said feeler gage measures gaps in thousandths of an inch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification