Importance

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Abstract

A worktable apparatus for a machine tool, such as a CNC punch press, a laser equipped machine tool or plasma torch equipped machine tool, which processes a metal sheet or plate workpiece. The worktable apparatus serves a dual function as (a) a worktable that supports a workpiece during processing by a machine tool and as (b) an unloading station for unloading a workpiece or a skeletal remnant produced by the machine tool. The machine tool has a set of workclamps, which move under CNC control along at least one of the numerically controlled axes, grip the workpiece and carry it through the machine for processing. Located on one side of the machine tool, the worktable apparatus has a surface adapted to allow the workpiece to ride smoothly under the motive power of the workclamps. In one embodiment, the worktable apparatus is made up of two roller sets supported such that one long edge of each is fixed to a frame, and the other edge is normally supported in horizontal orientation creating a gap between the roller sets. When a workpiece or a skeletal remnant is rolled into position on the worktable apparatus and the CNC initiates the worktable apparatus to open, controlled actuators, such as cylinders, cause the center edges of the two roller sets to drop away, allowing the workpiece or skeletal remnant to fall freely from its supported position on the worktable apparatus to an unloaded position below.

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First Claim