Out-rigger grinding fixture

Abstract

An outrigger grinding fixture to support a workpiece on a manual surface grinder having a worktable and a grinding wheel. The outrigger grinding fixture comprises a base member maintained on the worktable. A slide member has a V-shaped slot formed on an upper edge. A mechanism is for horizontally adjusting the slide member on the base member. Another mechanism is for preventing vibration of the workpiece when the grinding wheel engages with the workpiece.

1 . An outrigger grinding fixture to support a workpiece on a manual surface grinder having a worktable and a grinding wheel, the outrigger grinding fixture comprising:
 a) a base member maintained on the worktable;   b) a slide member having a V-shaped slot formed on an upper edge;   c) means for horizontally adjusting the slide member on the base member; and   d) means for preventing vibration of the workpiece when the grinding wheel engages with the workpiece.   
     
     
         2 . The outrigger grinding fixture as recited in  claim 1 , wherein the worktable and the base member are both magnetic so that the base member can be held in position on the worktable. 
     
     
         3 . The outrigger grinding fixture as recited in  claim 1 , wherein the horizontally adjusting means comprises:
 a) a dovetail tenon formed on a top surface of the base member;   b) the slide member having a mortise formed on a lower edge which engages with the dovetail tenon of the base member to allow the slide member to be manually adjusted along the dovetail tenon; and   c) a setscrew extending through one side of the slide member and against one side of the dovetail tenon to retain the slide member in place on the base member.   
     
     
         4 . The outrigger grinding fixture as recited in  claim 1 , wherein the vibration preventing means comprises:
 a) a pair of adjustable supports, each support extending into one side of the slide member and into the V-shaped slot;   b) an L-shaped clamping arm having a first leg and a second leg, the first leg pivotally mounted to a first upper corner of the slide member;   c) a clamping roller pivotally mounted to the second leg of the L-shaped clamping arm; and   d) an elongated clamping screw threaded through a pivot pin that is mounted to a second upper corner of the slide member which engages with the first leg to adjust the L-shaped clamping arm, so that the clamping roller will make proper contact with the workpiece.   
     
     
         5 . The outrigger grinding fixture as recited in  claim 4 , wherein each adjustable support comprises:
 a) a threaded shaft which threads into one side of the slide member;   b) a hardened dowel pin extending from a top end of the threaded shaft to make proper contact with the workpiece; and   c) an adjustment nut at the top end of the threaded shaft to maintain the threaded shaft in position in the V-shaped slot of the slide member.