Forging press

Claim 2

A forging press, which comprises a forging box, at least one horizontal press ram having a free end, gripping means mounted on said free end and spring-biased in a closing sense, a first tool assembly comprising a tool frame and a tool and held by said gripping means on said free end of said press ram, a rotatable magazine which comprises a plurality of angularly spaced retaining clamps, which are spring-biased in a closing sense, a second tool assembly which is retained by one of said retaining clamps, and first and second releasing means mounted on said forging box, said press ram being movable to a tool-changing position, in which said gripping means are adapted to be opened by the operation of Said first releasing means, said magazine being rotatable to any of a plurality of angular positions, in each of which one of said retaining clamps is adapted to be opened by said second releasing means and closely adjacent to and in register with said gripping means when said press ram is in said tool-changing position, whereby said first tool assembly can be transferred from said gripping means to one of said retaining clamps when said press ram is in said tool-changing position and said magazine is in one of said angular positions, and said second tool assembly can subsequently be transferred from another of said retaining clamps to said gripping means when said magazine has been rotated to another of said angular positions and said press ram is in said tool-changing position.

Claim 3

A forging press as set forth in claim 1, in which each of said first and second releasing means comprise a stationary, pressure fluid-operated actuator mounted on said forging box.

Claim 4

A forging press as set forth in claim 1, in which said first releasing means comprise a first ram which is engageable with said gripping means to open the same when said press ram is in said tool-changing position, and said second releasing means comprise a second ram which is engageable with each of said retaining clamps to open the same when said magazine is in such an angular position that said clamp is closely adjacent to and in register with said gripping means when said press ram is in said tool-changing position.

Claim 5

A forging press as set forth in claim 1, which comprises an additional horizontal press ram having a free end, additional gripping means mounted on said free end of said additional press ram and spring-biased in a closing sense, an additional first tool assembly comprising a tool frame and a tool and held by said additional gripping means on said free end of said additional press ram, an additional rotatable magazine which comprises a plurality of angularly spaced additional retaining clamps, which are spring-biased in a closing sense, an additional second tool assembly which is retained by one of said additional retaining clamps, and additional first and second releasing means mounted on said forging box, said additional press ram being movable to a tool-changing position, in which said additional gripping means are adapted to be opened by the operation of said first releasing means, said additional magazine being rotatable to any of a plurality of angular positions, in each of which one of said additional retaining clamps is adapted to be opened by said additional second releasing means and closely adjacent to and in register with said additional gripping means when said additional press ram is in its said tool-changing position, whereby said additional first tool assembly can be transferred from said additional gripping means to one of said additional retaining clamps when said additional magazine is in one of its said angular positions, and said additional second tool assembly can subsequently be transferred from another of said additional retaining clamps to said additional gripping means when said additional magazine has been rotated to another of its said angular positions and said additional press ram is in its said tool-changing position.

Claim 6

A forging press as set forth in claim 1, in which said magazine is rotatable about an axis of rotation which includes an angle of 45* with the longitudinal axis of said press ram, said magazine carries a plurality of receiving brackets which protrude from the periphery of said magazine and include an angle of 45* with said axis of rotation, and each of said receiving brackets carries one of said retaining clamps and comprises a stop that is engageable by one of said tool frames.

Claim 7

A forging press as set forth in claim 1, in which said press ram carries at said free end a backing plate and said gripping means are carried by saId backing plate and hold said tool assembly against said backing plate.