Self-propelled rotary tool

摘要

The present invention is a rotary head tool that is a self-propelled rotary tool (SPRT) operable for round cutting involving hard turning. The rotary head tool comprises generally a toolholder, a tool that is removably or fixedly connectable to the toolholder, and an insert that that incorporates a cutting edge finable into the tool. The toolholder is formed to hold the tool with the insert therein at a particular angle. Elements of the rotary head tool of the present invention, such as the insert, may be “off the shelf elements and consequently the present invention may be produced at a low cost. Embodiments of the present invention are designed so that the rotary head tool provides economical benefits and affordability for the user and to provide performance benefits of SPRTs.

主权项

1. A rotary head tool is a self-propelled rotary tool SPRT operable for machining that is round cutting involving hard turning, said rotary head tool characterized in that it comprises:
(a) a tool fixture having a hole therein; (b) a tool support incorporating an upper portion and a lower portion, said tool support being insertable within the hole in the tool fixture so that the upper portion of the tool support extends above the tool fixture and the lower portion of the tool support extends below the tool fixture when the tool support is inserted within the hole in the tool fixture; (c) a bearing having a hole therein of a size to receive the lower portion of the tool support that extends below the tool fixture, said bearing being held in place encompassing the lower portion of the tool support by one or more washers and a threaded nut engageable with threading formed in the lower portion of the tool support; (d) a first bearing having a hole therein of a size to encompass the tool support, said first bearing being insertable within the hole in the tool fixture while encompassing the tool support; (e) a second bearing having a hole therein of a size to encompass the tool support, said second bearing having a wider diameter than the hole in the tool fixture, and said second bearing being positionable between the first bearing and the upper portion of the tool support; and (f) an insert incorporating a cutting edge being insertable within an indentation formed in a top edge of the upper portion of the tool support, said indentation having a threaded section cut therein to extend below the insert when said insert is inserted within the indentation, said insert having a hole with a threaded inner wall cut therein and being attached to the tool support by a threaded screw fitted within the hole in the insert and connected to the threaded section of the indentation; andwherein the insert fitted within the indentation is positioned at an angle in relation to the tool fixture, said angle being pre-determined to achieve optimum cutting performance.