Eumuco Aktiengesellschaft Fur Maschinenbau

Eberhard Werner

Walter Willenbrock

Friedrich Willim

The walking beam assembly of the forging presses operates in several movement phases including a lifting movement, advance movement, lowering movement, opening movement, return movement, and closing movement. Step motors control driving members which perform individual moving processes in the individual movement phases. In turn, driving member processors drive the step motors by frequencies changing with time. When the velocity or frequency of the step motors are plotted on the ordinate of a graph and time along the abscissa of the graph, a trapezoidal graph form is produced along the time (t) line of the graph for each of the movement phases. Each trapezoidal form includes a rising flank and a falling flank with some of the flanks for adjacent driving member phase movement overlapping in time. The opening and return movement phases form a fixed cycle having a length predetermined and constant for all cycle lengths. The remaining phases form a varicycle having a length that changes with the length of the cycle time. During the fixed cycle, the walking beam assembly or manipulator does not move any workpieces. The varicycle can be adjusted to the respected mass of the workpieces. For workpieces having a large mass, the times for acceleration and delay are reduced.

Control system for a walking beam assembly of a forging press

The lifting beam assembly for transporting workpieces from work station to work station in a forming press includes a pair of transport beam members for grasping workpieces to be transported within the forming press. A first drive mechanism executes vertical movement to raise and lower the transport beam members. A second drive mechanism executes longitudinal movement of the transport beam members in a direction parallel to the direction traveled from work station to work station. A third drive mechanism executes transverse movement of the transport beam members. Each of the three drive mechanisms include movement actuating devices for effecting the respective vertical, longitudinal and transverse movements. An actuating shaft is secured at one end thereof for hydraulic actuation by an electro-hydraulic booster. It is coupled at the other end thereof to the movement actuating device for effecting the particular respective movement of the transport beam members. Various features of the individual portions of the structure are also set forth.

Lifting beam assembly for a forming press

The lifting beam manipulator assembly is used for transporting workpieces in a forging press having machine tools. The assembly comprises a lifting beam including a carrier that is movable forwards and backwards and has workpiece grasping means. The grasping means includes a pair of grab arms located at each of the machining positions. A control mechanism is provided for the lifting beam for controlling the movement of the carrier along a workpiece transporting path which includes movement in three axes which are perpendicular with respect to each other. The movement control mechanism includes a linear transport means for movement along each of the axes and individual drive assemblies for each linear transport mechanism for effecting each movement of the carrier in the three axes. A limit switch gear mechanism activates each of the individual drive mechanisms for the linear transport means. A blowing and spraying apparatus is provided for cleaning, lubricating and cooling the machine tools between each of the forge pressing operations.

Lifting beam manipulator assembly for forging presses

The assembly for blowing out and spraying dies in a forging press is particularly adapted both to automatically operating and hand operated drop-forging presses. The automatically operating drop forging presses have workpiece transport effected by a walking beam transport system. The blowing and spraying assembly comprises arms having nozzles disposed at the end thereof to be guided into the mold area of the forging press in a timed sequence while avoiding the movement of the press plunger and walking beam transport system when it is being used. The blowing and spraying assembly comprises a carrier means hinged to a four-bar linkage arrangement which has two levers and a carrier member. In a specific embodiment, the ends of the two levers facing away from the carrier member are pivotably mounted to a housing. The housing constitutes a carrier support means secured to the stator of the forging press. One of the two levers is a drive lever used to move the carrier member and thus the nozzle means into and out of the mold area within the pressing zone of the forging press. The blowing and spraying assembly of the present invention is designed to permit universal use in both automated drop-forging presses and in hand operated drop-forging presses.

Assembly for blowing out and spraying dies in forging presses

The article handling assembly includes a lifting beam having a support with a plurality of workpiece grasping members. The support is moved inwardly and outwardly with respect to the work stations of the forging press. A spraying mechanism is also provided to move inwardly and outwardly with respect to the work stations of the forging press. A control mechanism operates the movement of the lifting beam having the workpiece grasping members effecting movement from one work station to the next. The movement is effected along the length of the forging press work stations outside of the area of the work stations. The movement of the spraying mechanism into and out of the work stations is synchronized with the movement of the workpiece grasping members moving into and out of the work stations to initially grasp workpieces and then to release the workpieces in the next work station. These operations are effectuated while the forging press is in an open position. Thus, each time workpieces are moved, the spraying device enters the work stations and effectuates the function of cleaning, lubricating and cooling.

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Leverkusen, Germany

Eberhard Werner