Claims
- 1. The method of using multiple data relating to energy to maintain kinetic output at a preselected level to obtain a preselected kinetic energy at the time of impact of a ram of a forging hammer in a system employing an impact device having a frame supporting at least one cylinder, a piston within said cylinder, means connecting the piston to a ram assembly such that the ram is repeatedly movable relative to the frame from a retracted position into impact position, a driving compressible fluid system including a fluid supply, valve means connecting said fluid supply into said at least one cylinder at a position in the cylinder to drive the ram into impact position and permitting release of fluid from the cylinder, and a trapped volume of compressible lifting fluid causing the ram to be retracted from impact position when fluid driving the ram into impact is released from the cylinder, wherein there is provided pressure sensing means to sense the pressure of the lifting fluid, calculating means for calculating kinetic energy, comparator means for comparing kinetic energy with a standard and a counter for accumulating error, comprising: sensing the pressure of the lifting fluid to determine the rate of change of lifting fluid pressure and corresponding velocity of the ram assembly, calculating from the velocity and the mass of the ram assembly the kinetic energy, comparing the calculated kinetic energy with a preselected kinetic energy requirement input, and, if there is significant error, correcting the timing of the valve means in the direction to correct or minimize the error.
- 2. The method of claim 1 in which upon repeated determination of error a signal is provided to correct the mechanical system.
Parent Case Info
This is a divisional application of Ser. No. 695,697, filed Jan. 28, 1985, now U.S. Pat. No. 4,653,300.
US Referenced Citations (7)
Foreign Referenced Citations (4)
Number |
Date |
Country |
94800 |
Jul 1980 |
JPX |
703362 |
Dec 1979 |
SUX |
915990 |
Jan 1980 |
SUX |
893279 |
Dec 1981 |
SUX |
Divisions (1)
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Number |
Date |
Country |
Parent |
695697 |
Jan 1985 |
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