Microprocessor monitoring system for fastener tightening

Details Microprocessor monitoring system for fastener tightening Microprocessor monitoring system for fastener tightening

1980-12-12

1983-08-23

Krass, Errol A.

Boots, shoes, and leggings

73761, 7386224, G06F 1520, B23P 1906

Patent

active

044007850

ABSTRACT:
A method for monitoring torque and angle developed upon a fastener during fastener run-up and setting, which method utilizes successive area measurements under a torque-angle curve, said areas being compared at predetermined torque levels to provide an indication of whether or not the entire assembly operation satisfies established criteria.
Auxiliary means may include tool stopping by automatic shut-off means, or tool stall, and read-out means in the form of a printed record, an alarm signal, e.g., flashing lights or sounding means, as well as marking of a fastener to indicate compliance with predetermined fastener assembly criteria.

REFERENCES:
patent: 4102182 (1978-07-01), Brown et al.
patent: 4110829 (1978-08-01), Boys
patent: 4208775 (1980-06-01), McCombs et al.
patent: 4244245 (1981-01-01), Wallace et al.
patent: 4280380 (1981-07-01), Eshghy
patent: 4333220 (1982-06-01), Aspers

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