Electricity: motive power systems – Positional servo systems – Adaptive or optimizing systems including 'bang-bang' servos
Patent
1991-03-05
1993-03-23
Shoop, Jr., William M.
Electricity: motive power systems
Positional servo systems
Adaptive or optimizing systems including 'bang-bang' servos
318602, 318645, 318652, 36447402, 36447415, 36447428, 364476, H02P 700
Patent
active
051967731
ABSTRACT:
A rivetting machine has a hydraulic cylinder connected with a hydraulic power source, the cylinder including a piston shaft, a motor-driven spindle extending through and journaled to the piston shaft, and a rivet head forming tool secured to the bottom end of the spindle and carrying a forming shaft. A controller of the machine has a linear encoder for detecting the axial position of the piston shaft, an electric hydraulic servo valve provided in a hydraulic circuit between the hydraulic power source and the hydraulic cylinder, a machining data input unit for inputting machining data of the work rivet into a programmable control unit. The control unit receives the output of the linear encoder and the input machining data and controlling the hydraulic cylinder via the electric/hydraulic servo valve based on the machining data and the output of the encoder.
REFERENCES:
patent: 3970830 (1976-07-01), White et al.
patent: 4157231 (1979-06-01), Phillips
patent: 4233491 (1980-11-01), Maruyama et al.
patent: 4570385 (1986-02-01), Richter et al.
Kobayashi Kazuo
Nakagawa Shuichi
Yamada Minoru
Yoshikawa Seiichi
Martin David
Shoop Jr. William M.
Yoshikawa Iron Works Ltd.
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