Vertical type of double disc surface grinding machine

Abstract

In a vertical type of double disc surface grinding machine, an object of this invention is to enable simple adjustment of a parallelism between a grinding surface of a lower grinding wheel and a work end face clamped by a clamping jig of a rotary table, even when a grinding wheel spindle axis is disordered. The vertical type of double disc surface grinding machine is equipped with a pair of grinding wheels 2 &3 opposing each other in vertical direction and fixed to a pair of vertical grinding wheels 4 &5 and a rotary table 15 holding a work W and supplying it to a grinding position A1 located between the grinding wheels 2 &3, and provided on the rotary table 15 with a work clamping jig 17 including a rotary shaft 63 which clamps the work W at a specified position and makes it spin itself. The table 15 and a bed 14 supporting its drive mechanism are supported by plural supporting legs 12 adjustable in their heights, so that front-to-back and right-to-left inclination angles can be adjusted in relation to horizontal level, and the supporting legs 12 are installed on a slide bed 11 slidable in horizontal direction.

Description

BACKGROUND OF THE INVENTION [0001] 1. Technical Field of the Invention [0002] This invention relates to a vertical type of double disc surface grinding machine, in which a pair of grinding wheels opposing each other in vertical direction are installed, a work is securely clamped to a work clamping jig provided on a rotary table, the work is supplied to a grinding position located between the grinding wheels, and both upper and lower surfaces of the work are ground simultaneously while the work is rotated around a spindle axis of the work clamping jig. [0003] 2. Prior Art [0004] Generally, the vertical type of double disc surface grinding machine is equipped with a work supplying device suitable for a supplied work according to its size and type. In a work which can not be held at its center and is small in its rigidity such as a piston ring etc., for example, a work supplying device is used wherein the work is held in a work holding hole formed on a thin-plate type rotary carrier in...

AI Technical Summary

Problems solved by technology

Since the work is clamped to the rotating spindle of the clamping jig in the later work supplying device, there is no chance for the work to automatically incline according to the grinding surface, so that the work grinding thickness can not be kept uniform to cause a decrease in a grinding accuracy.

Therefore, the correction of accuracy will become very troublesome.

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