Abstract: The disclosure relates to an improved automatic tool changer for use in a machining apparatus. The automatic tool changer is designed to cooperate with adapters each carrying a tool to be changed. The automatic tool changer comprises a bifurcated carrier plate and structure to traverse the carrier plate between a tool storage and the spindle of the machining apparatus. The upper tool-feeding arm of the carrier plate has two support rods extending therefrom and structure to detachably hold an adapter on the vertical support rods, and the lower tool-withdrawing arm of the carrier plate has two vertical support rods extending therefrom.

Abstract: Disclosed is an improved inner surface shaper comprising, on a bed, a first reciprocating stock having a first working spindle and a drive screw, a servomotor to drive the drive screw for making a linear reciprocation of the first reciprocating stock, a second reciprocating stock having a second working spindle, a hydraulic cylinder to drive the second reciprocating stock toward and apart from the first reciprocating stock, and a tool rest placed between the first working spindle and the second working spindle. The first working spindle, second working spindle, drive screw and hydraulic cylinder are arranged along the center line of the bed, and the hydraulic cylinder and first reciprocating stock are connected by two joint rods which are arranged symmetrically with respect to the center line of the bed.This arrangement has the effect of directing undesired counter force to the joint rods and the longitudinal axis of the drive screw.

Abstract: Disclosed is an improved tool mount for a machining apparatus comprising essentially a tool holder cubic and an adapter to be detachably attached to the tool holder cubic. The tool holder cubic has a center guide projection, a notched cylindrical rod rotatably fitted in a semicircular hole of the center guide projection, and means for rotating the notched cylindrical rod. The adapter has a center slot to accept the center guide projection of the tool holder cubic, a semicircular recess made so as to allow the notched cylindrical rod to enter when it turns; and means for rotating the notched cylindrical rod to enter the semicircular recess, thereby allowing the adapter and the tool holder cubic to nest together. This arrangement permits easy and quick changing of different tools in a machining apparatus, and automatization of tool exchanging.