GB401467A - Improvements in and relating to grinders for internal cylindrical surfaces - Google Patents

Abstract

401,467. Cylinder grinders. HUTTO ENGINEERING CO., Inc., 515, Lycaste Avenue, Detroit, Michigan, U.S.A. Sept. 8, 1932, No. 25043. Convention date, Nov. 25, 1931. [Class 60.] Relates to internal cylinder grinders having radially - adjustable stones 24 controlled by opposed cones 17, 18, as described, for example, in Specification 311,138, [Class 60, Grinding or abrading &c.], and consists mainly in providing automatic means for expanding and contracting the stones upon moving the tool into and out of the cylinder bore. In the tool shown, the lower cone 18 is connected by a screwed rod 38 to a nut 43 and the upper cone 17 by an oppositely - screwed sleeve 46 to a nut 47. The nuts are feathered together and shouldered to support discs 56, 54 serving as abutments for a spring 57 that constantly tends to contract the cones and spread the stones. The grinding diameter is set by rotating a collar 60 which is geared through an intermediate pinion 66 to elongated teeth on the nut 43. The separation of the discs 54, 56 is limited by links 77 which ensure ultimate expansion of the stones to the set .diameter, but during the preliminary cuts, the stones are automatically fed outwards by the expansion of the spring 57. When the tool is withdrawn into the casing 70, levers 86 engage a fixed coned wall 75 and operate levers 84 to raise the disc 54 and permit the stones to contract by the action of the usual garter springs 25, 26, the stones being automatically expanded when the tool is again pushed into the work.