GB440854A - Improvements in or relating to grinding or polishing machines - Google Patents

Abstract

440,854. Grinding and polishing. WALTERS, B., 57, Bailey Street, Sheffield. Dec. 22, 1934, No. 36891. [Class 60] A machine for grinding or polishing work of thin flat form, for example, knife blades, between two parallel grinding or polishing cylinders, comprises means for oscillating or rotating the work in the common tangential plane of the cylinders, with means for reciprocating the work in a direction perpendicular to the plane containing the axes of the cylinders. The machine comprises a frame 7 in which the cylinders 5 are mounted and adjustable by screws 8, the cylinders each being belt driven from a separate electric motor 12 on brackets 14. On a guide or a bracket 17 is movable, towards and from the cylinders, a saddle 19 to which is pivoted at 21 a work table 20 having adjustable thereon, by a rack 27 and a pinion 28, a work-clamp 25 holding the blades, &c. 26. The saddle is reciprocated by a lever 30 actuated by a rod 34 and an adjustable crank 35 driven by a motor 38, and on the table 20 is a finger 23, which engages a sinuous slot in a plate 22 mounted on the bracket 17 ; the finger 23 and the plate 22 may be adjustable, and the sinuosity of the slot may be irregular so that successive oscillations of the table may be of different amplitude. The table 20 may be rotated continuously or oscillated by an independent motor, or may be oscillated by a cam, eccentric, or crank. According to the Provisional Specification, the reciprocating movement of the saddle is optional.