Woodworking – Rotary cutter – Having slotted bit seat
Patent
1990-02-22
1991-03-26
Bray, W. Donald
Woodworking
Rotary cutter
Having slotted bit seat
144117R, 144221, 144229, 144241, 407 45, 407 51, B27G 1300, B27C 114
Patent
active
050021044
ABSTRACT:
A cutterhead for an industrial woodworking machine which is operable to incorporate a sufficient number of knife rows to permit a staggered tooth arrangement for noise reduction or, alternatively, to provide improved surface finish at higher feed rates without increasing cutterhead RPM. The cutterhead also provides for the generation of a variety of shapes when used with appropriately shaped individual cutting inserts. The cutterhead includes a cutterhead body having a cylindrical portion having a plurality of circumferentially spaced grooves for receiving a plurality of cutting inserts, a predetermined hole pattern in the cutterhead body for securing the cutting inserts in the grooves, and in the preferred embodiment elongated slots in the cutting inserts which permit lateral adjustment of the cutting inserts along the axis of the cutterhead. Profile shape adjustments are made through the use of a cam device. The individual cutting inserts can be replaced if broken or worn by simply exchanging the cutting inserts with properly ground cutting inserts due to the precise position repeatability afforded by the groove and slot seating design of the present invention which provides for economical, simple, and accurate replacement of the cutting inserts, thereby reducing the number of cutterheads required for a particular operation, and allowing interchangeability of cutting tool mateials by simply exchanging cutting inserts within a single head body.
REFERENCES:
patent: D239317 (1976-03-01), Stewart
patent: 3785417 (1974-01-01), Vora
patent: 3933189 (1974-09-01), Boles et al.
patent: 4074737 (1978-02-01), Stewart
Stewart, John S., "Noise Control Techniques for Double Enders", Wood & Wood Products, pp. 27-30, Sep. 1975.
Stewart, John S., "Woodworking Machinery Noise Control: A Practical Approach", Furniture Production Mag., pp. 18-23, Apr. 1977.
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