Portable machine for processing keys

Details Portable machine for processing keys Portable machine for processing keys

1999-09-24

2001-01-30

Briggs, William (Department: 3722)

Gear cutting, milling, or planing

Milling

With regulation of operation by templet, card, or other...

C076S110000

Reexamination Certificate

active

06179531

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a machine for processing keys, and more particularly to a portable machine for processing keys, which greatly shortens the processing time in making a key precisely.
Conventional machines for processing keys commonly use computer-controlled air cylinders to control the angle and stroke of the feeding of a reamer in processing a blank into a key. The air cylinders are controlled by a microprocessor, by means of the running of a computer program, to achieve eight different feeding strokes. Because a number of air cylinders and servomotors are used, conventional machines for processing keys are commonly bulky and heavy. Because air cylinders control the cutting angle and cutting depth of the reamer, it is difficult to achieve the desired cutting operation precisely. Further, because the air cylinders must achieve eight different feeding strokes, the design of the computer program is sophisticated.
SUMMARY OF THE INVENTION
The present invention uses a computer to control the operation of a set of sensors and motors, so as to further control the movement of a bevel scale and a cutting depth scale, enabling the feeding of the reamer to be accurately controlled. According to one aspect of the present invention, a cutting angle control unit and a cutting depth control unit control the cutting angle and cutting depth of the reamer, which are in turn controlled by a set of sensors. The cutting angle control unit uses a bevel scale to control the cutting angle of the reamer. The cutting depth control unit uses a cutting depth scale to control the cutting depth of the reamer. The bevel scale and the cutting depth scale each have a plurality of peripheral notches. Through the respective peripheral notches, the sensors respectively detect the amount of movement of the bevel scale and the cutting depth scale. According to another aspect of the present invention, respective motors through respective toothed shafts move the bevel scale and the cutting depth scale. According to still another aspect of the present invention, a jig is used with the bevel scale to hold a blank, enabling the blank to be accurately processed into a key.


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