Thread grinding attachment
AssigneeGrumman Aerospace Corporation
InventorEdwin W. Unser
Life of this patent
Estimating the term…
Abstract
A conventional cutting tool grinder is fitted with an attachment which imparts translational motion to the cutting tool grinder table in accordance with the pitch of a removable master threaded member. A crank drives a pulley linked to the master threaded member and rotates a translating work piece in accordance with the thread on the master treaded member. Accordingly, a grinding tool can duplicate the thread of a work piece as dictated by the master threaded member. The mechanism of this invention can also be embodied as a separate bench mounted machine incorporating a grinding tool such that it does not require attachment to a conventional cutting tool grinder for its operation.
Claims7
An attachment for a cutting tool grinder machine which includes a translatable table and a shaft-driven chuck for securing a cylindrical work piece in contact with a grinding tool, the attachment comprising:
- a fixed removable master thread member;
- a sleeve coaxially mounted over the master thread member;
- a nut mounted to the master thread member and keyed to the sleeve;
- a crank connected to the sleeve for rotating the sleeve and the keyed nut;
- means connected between the sleeve and the table for causing the translation of the latter upon turning of the crank at a rate corresponding to the pitch of the master thread member;
- and
- means connected between the sleeve and a drive shaft of the machine for rotating the work piece while it translates to duplicate the thread of the master threaded member.
An attachment for a cutting tool grinder machine which includes a translatable table and a shaft-driven chuck for securing a cylindrical work piece in contact with a grinding tool, the attachment comprising:
- a fixed removable master thread member;
- a sleeve coaxially mounted over the master thread member;
- a nut mounted to the master thread member and keyed to the sleeve;
- a crank connected to the sleeve for rotating the sleeve and the keyed nut;
- a thrust bearing contacting the sleeve for translating sleeve rotation to longitudinal translation;
- means .seated on the bearing and connected to the table for directly moving the table with the longitudinal translation upon turning of the crank at a rate corresponding to the pitch of the master thread member;
- pulley means entraining the drive shaft and sleeve for imparting rotation from the sleeve to a drive shaft thereby rotating the work piece while the latter translates which duplicates the thread of the master threaded member.
Dependencies are inferred from the claim text.