초록 ▼

In forging hammers, according to the present invention, more than one inlet valve is employed and more than one exhaust may be employed. The force of impact for a particular blow is controlled by the number of valves employed and the timing of the opening and closing of those valves relative to one

In forging hammers, according to the present invention, more than one inlet valve is employed and more than one exhaust may be employed. The force of impact for a particular blow is controlled by the number of valves employed and the timing of the opening and closing of those valves relative to one another. By making successive adjustments with different combination of valves, the controls may be calibrated so that the same ram force may be repeated. Knowing the valve settings required to produce differing amounts of force, it is possible to program the settings into the memory of a computer, so that when a particular impact force is selected the appropriate valve timing will be reproduced and the desired force obtained. It is also possible to set up a sequence of blows of differing selected force, setting each blow using the computer memory.

대표청구항 ▼

[ We claim:] [1.] In an adaptive, self-regulating control system for a forging hammer having a frame supporting at least one cylinder, a piston within the cylinder and means connecting the piston to a ram arranged to be repeatedly movable relative to the frame from retracted position to impact posit

[ We claim:] [1.] In an adaptive, self-regulating control system for a forging hammer having a frame supporting at least one cylinder, a piston within the cylinder and means connecting the piston to a ram arranged to be repeatedly movable relative to the frame from retracted position to impact position at which forging takes place, a piston fluid system comprising:a regulated drive fluid supply:inlet valve means comprising a plurality of inlet valves in parallel connecting said drive fluid supply to the cylinder at a position within the cylinder to allow the fluid to drive said ram into the impact position;inlet valve control means for each of the inlet valve means permitting opening and closing of the inlet valves;a ram return fluid supply and connection to the cylinder in position to return the piston to its retracted position;exhaust valve means connecting the cylinder to atmosphere permitting the drive fluid to be exhausted from the cylinder;exhaust valve control means permitting opening and closing the exhaust valve means;means for selecting and regulating the timing of actuation of inlet and exhaust control valves to operate the inlet and exhaust valves to achieve settings predetermined to deliver a selected predetermined blow force at impact with a predetermined combination of inlet valves, so that various blow forces may be achieved by varying timing of at least one of the inlet valves.