Importance

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Abstract

Disclosed is an improvement in a cam assembly for use in a pressing machine having a lower cam to be fixed to the base of the pressing machine, a spring-biased sliding cam whose front surface is allotted to fix a machining tool and a cam holder to be fixed to the upper frame of the pressing machine. The sliding cam is operatively combined with the lower cam to slide on the inclined surface of the lower cam synchronously with the rising and descending of the upper frame of the pressing machine, whereas the cam holder and the sliding cam is so combined as to leave a predetermined space defined therebetween, thereby permitting the sliding cam to be slidably held in the cam holder. The cam assembly further has a spacer to be inserted in the predetermined space and detachable fastening means to fix the sliding cam to the cam holder as if the slider were like with the upper frame of the pressing machine staying at its lower dead end. A required machining to be effected on the tool mount of the sliding cam for changing the machining tool can be advantageously effected in situ without disassembling the cam assembly.

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First Claim