What is the solution to the centering deviation of the three-jaw chuck?

1. When processing a large number of workpieces with high concentricity, piece-by-piece correction will increase a lot of auxiliary time and affect productivity. The previous solution was to add a set of rings, machine a cast iron ring to fit the workpiece inside the ring, and use a chuck to tighten the ring.

2. Due to the wear and tear of the three-jaw chuck during application, three types of accumulated errors have occurred. In order to control the cost, it is usually used improvised, and the cast iron ferrule is modified and a Ф85 elastic ring is added.

When manufacturing the elastic ring, the shape and position tolerance must meet the drawing design standards. An opening parallel to the axis direction is cut on the elastic ring, with a width of about 5mm. The material is spring steel, the hardness after quenching and tempering is HRC35~45, because the elasticity is better in this hardness range.

When installing the elastic ring, it must be placed correctly to avoid tilting. The centering accuracy of the ground three-claw chuck can be good, and the three-claw chuck should be cleaned before grinding.