Patent ID: 8328603
Filing Date: 2012-12-11
Classification: B24C

Abstract:
1. An apparatus for stress shot peening of a coil spring, comprising: a pair of bucket conveyors provided on a rear portion of a base, the bucket conveyors being mounted at lower ends thereof to an upper surface of the base; a shot room coupled at a lower end thereof to the lower ends of the bucket conveyors, with a pair of screws provided in a central portion of a lower end of the shot room, the screws being coupled to each other by a connection member, wherein one selected from between the screws is coupled to a first drive motor provided on the upper surface of the base; a separator coupled at opposite ends thereof to the respective bucket conveyors, with a separator screw provided in the separator, the separator screw being connected at one end thereof to a second drive motor; a plurality of impellers provided on an upper surface of the shot room and coupled to the separator to discharge shot balls into the shot room; conveyor lifting units respectively provided on first and second ends of the upper surface of the base; a spring input conveyor coupled to the conveyor lifting unit provided on the first end of the upper surface of the base, the spring input conveyor being adjusted in height by the corresponding conveyor lifting unit; a spring output conveyor coupled to the conveyor lifting unit provided on the second end of the upper surface of the base, the spring output conveyor being adjusted in height by the corresponding conveyor lifting unit; width adjustment units respectively provided on medial portions of front and rear ends of the upper surface of the base such that inner ends of upper portions of the width adjustment units are disposed in the shot room; a clamping unit revolving chain provided on each of the width adjustment units such that a portion of the clamping unit revolving chain is disposed in the shot room, the clamping unit revolving chain being wrapped at two positions around drive sprockets, which are rotatably provided on respective opposite ends of an upper surface of the corresponding width adjustment unit, so that the clamping unit revolving chain is revolved around the drive sprockets by the drive sprockets; a sprocket drive unit provided on a second end of the upper surface of the shot room, the sprocket drive unit being coupled to the drive sprockets provided on the corresponding ends of the upper surfaces of the respective width adjustment units; a plurality of spring clamping units mounted to each clamping unit revolving chain at position spaced apart from each other at regular intervals, the spring clamping units being oriented outwards with respect to the clamping unit revolving chain; and a clamping unit rotating chain provided on each of the width adjustment units, the clamping unit rotating chain being disposed outside the corresponding clamping unit revolving chain, the clamping unit rotating chain engaging with medial portions of the corresponding spring clamping units, thus rotating the spring clamping units on axes thereof, the spring clamping units being revolved around the corresponding sprockets by the corresponding clamping unit revolving chain.