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Crankshaft blank center hole run-out testing fixture

The invention belongs to the field of crankshaft production detection, and particularly relates to a crankshaft blank center hole run-out testing fixture which comprises a dial indicator, a referenceseat, a measuring swing arm and a connecting frame, the reference seat comprises a seat body, a positioning head and a first elastic piece, the positioning head comprises a guide rod and a spherical ejector head, and the positioning head can only move left and right; the distances between a hard alloy measuring head of the measuring swing arm and the rotating shaft and between the meter rod contact and the rotating shaft are equal. The bottom of the connecting frame is fixedly connected with the seat body, the measuring swing arm is rotatably installed on the upper portion of the connecting frame through a rotating shaft of the measuring swing arm, and the measuring swing arm tends to rotate anticlockwise under the action of a second elastic piece. The dial indicator is arranged in middleof connecting frame, and an indicator rod head leftwards abuts against an indicator rod contact of a vertical swing rod. The testing fixture has the advantages that the operation is simple, the detection is fast and convenient, the 100 percent detection is favorably realized, the requirement on the placement position of a detected workpiece is low, the workpiece measurement is more flexible, and the labor intensity of workers is reduced.
Owner:桂林福达重工锻造有限公司
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