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US 3,937,587 AGranted
Adjustable cutter tooth mounting
AssigneeThe Ingersoll Milling Machine Company
InventorsThomas J. Lindem, Jan Van Roojen
Life of this patent
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AssigneeThe Ingersoll Milling Machine Company
InventorsThomas J. Lindem, Jan Van Roojen
Estimating the term…
A mounting for supporting a cutter tooth in a boring bar for fine adjustment outwardly to compensate for tooth wear, the mounting including a cartridge insertable into a hole through the boring bar to support the tip of the cutter tooth in a cutting position with respect to the bar. The cartridge comprises a slidable holder connected by means of a differential screw to a nut so that, as the screw is turned, the length of the cartridge is increased to provide fine adjustment in the position of the cutter tooth. Coarse adjustment in the position of the cutter tooth is provided as an incident to assembling the parts of the cartridge by threading the screw into the nut until the lower end of the screw is flush with the lower end of the nut and by then mounting the holder on the upper end of the screw. Once assembled as a unit, the cartridge is inserted into the hole until an annular shoulder on the nut seats against a complimentary shoulder within the hole thereby accurately locating the cutter tooth so only fine adjustment is needed thereafter. In order for the mounting to be used in smaller diameter boring bars, one form of the invention utilizes a differential screw having interfitting male and female portions and, in the other form of the invention, a driver recess in the lower end portion of the screw permits the latter to be positioned essentially flush with the underside of the boring bar.
A mounting for supporting a cutter tooth for adjustment in fine increments having, in combination, a rotatable body with a hole extending therethrough, said hole having an upper end portion of a predetermined diameter, a cartridge having a maximum diameter slightly less than said predetermined diameter and a length adjustable outwardly a limited distance in fine increments from an initial preselected length, said cartridge in its initial length being telescoped into said hole from the upper end thereof and including a holder disposed within and slidably guided along said upper end portion of said hole, said tooth being secured to the outer end of said holder and providing a tip for cutting engagement with a workpiece during rotation of said body, means securing said holder within said hole against rotation so as to hold said tip at a preselected angular orientation with respect to said body while permitting the holder to be slid axially within said hole in fine increments to adjust the position of said tooth to keep said tip at a predetermined radial distance from the axis of rotation of said body, a nut mounted within said hole and being secured against movement within said hole, and a differential screw with one end portion threaded into said nut and being initially set in a predetermined position with respect to said nut during assembly of said cartridge, said screw having an opposite end portion connected to said holder after positioning of said one end portion so said cartridge is of said preselected length and may be rotated to position said tip within said preselected orientation prior to inserting the cartridge within the hole, means for locating said cartridge in a predetermined axial position within said hole as an incident to mounting the cartridge in the hole so as to position the tip of said tooth initially for cutting without need of substantial fine incremental adjustment regardless of the rotation required of said cartridge in positioning said tip at said preselected orientation, and means connecting with said one end portion of said screw for turning said screw within said nut from the end of said cartridge opposite the tooth to adjust the holder in fine increments in an axial direction with respect to said hole.
A mounting for supporting a cutter tooth for adjustment in fine increments having, in combination, a rotatable body with a hole extending therethrough, a cartridge telescoped into said hole from one end thereof and adapted for coarse adjustment of the cutter tooth prior to being inserted into the hole, said cartridge including a holder disposed within and slidably guided along said one end portion of said hole, said tooth being secured to the outer end of said holder and providing a tip for cutting engagement with a workpiece during rotation of said body, means securing said holder within said hole against rotation while permitting the holder to be slid axially in fine increments to adjust the position of said tooth, a nut mounted within said hole and being secured against movement within said hole and a differential screw including a female portion having an external thread of a predetermined pitch and an internal thread whose pitch is less than said predetermined pitch, said female portion initially being threaded in said nut to a predetermined position during assembly of said cartridge, said screw having a male portion fixed to said holder and having an external thread mated with the internal thread of said female portion, means connected with said female portion of said screw for turning said female portion within said nut from the end of said cartridge opposite the tooth to adjust the holder in fine increments in an axial direction with respect to said hole, and abutting means on said nut and within said hole for locating said nut in a predetermined axial position within said hole said cartridge being insertable into said hole only from the end of the hole from which the cutter projects.
A mounting for supporting a cutter tooth for adjustment in fine increments having, in combination, a rotatable body with a hole extending therethrough, a cartridge telescoped into said hole from one end thereof and adapted for coarse adjustment of the cutter tooth prior to being inserted into the hole, said cartridge including a holder disposed within and slidably guided along said one end portion of said hole, said tooth being secured to the outer end of said holder and providing a tip for cutting engagement with a workpiece during rotation of said body, means securing said holder within said hole against rotation while permitting the holder to be slid axially in fine increments to adjust the position of said tooth, a nut mounted within said hole and being secured against movement within said hole and a differential screw including a first thread of predetermined pitch mated with said nut initially in a predetermined position within said nut during assembly of said cartridge and a second thread whose pitch is less than said predetermined pitch, said holder having an internally threaded recess formed in the inner end portion thereof and mating with said second thread, a driver recess formed in the inner end portion of said screw to receive a driver for turning said screw to adjust the holder in fine increments in an axial direction with respect to said hole, and abutting means on said nut and within said hole for locating said nut in a predetermined axial position within said hole, said cartridge being insertable into said hole only from the end of the hole from which the cutter projects.
Dependencies are inferred from the claim text.