GB410941A - A gauge for use in adjusting the cutting edge of boring tools - Google Patents

Abstract

410,941. Linear dimension gauges. VOGTLANDISCHE MASCHINENFABRIK VORM. J. C. and H. DIETRICH AKT.-GES., Plauen, Vogtland, Germany. March 10, 1933, No. 7309. Convention date, March 29, 1932. [Class 106 (ii).] A gauge for use in adjusting the cutting edge of a boring tool in transverse relation to its axis of rotation comprises a precision measuring instrument disposed in a carrier independent of the machine containing the tool, said carrier being adapted to bE clamped on to a spindle carrying the cutting edge and held mechanically by means of bearing surfaces against the circumference of said spindle during the adjusting and measuring of the cutting edge. The carrier 8 has movable in it the steel pin 9, on the end of which is a small copper disc 10 contacting with the cutting edge 7 in the holder 2 displaceable in the boring spindle 1 from a remote place by means of a micrometer screw 5, the point of which engages the chainfered edge of a hole 6 in the holder 2. The disc 10 prevents damage to the edge 7 by the pin 9, the upper end of which abuts a feeler pin 11 to actuate an indicator 12 showing the adjustment given to the cutting edge 7. A spring in the indicator ensures the operative connection between the edge 7 and pins 9 and 11. In order to prevent damage to the edge 7 when the instrument is being placed on the spindle 1 the carrier 8 has pivoted on it at 15 a lever 16 having a projection 17 engaging with a cross pin 18 on the pin 9 so that pressure on the surface 20 against the action of the spring 19 causes the projection 17 to engage with the cross pin 18 and raise the pin 9 and disc 10 until the spindle 1 and edge 7 are in position. The carrier 8 is positioned on the boring spindle 1 by means of bearing surfaces 3 and 4, and is securely held in a vertical position by an arm 21 on the lever 16 held against the under side of the spindle 1 by the spring 19.