US 4,335,630 AGranted

High-speed manufacturing system for saber sawblades and the like

AssigneeAcu-Edge, Inc.

InventorFred G. Gunzner

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Abstract

An apparatus for rapidly manufacturing elongate sawblades, such as saber sawblades, from a continuous band of metal. All sequential steps of the manufacturing operation, including tooth-cutting, deburring, tooth-setting and shank-forming are performed prior to the blade being severed from the band of metal so as to avoid the necessity of handling the individual blades separately for any of these operations. All operations are synchronized to the movement of the tooth cutter, the speed of which is maximized by advancing it in a direction perpendicular to the width dimension of the steel band. The outer surface of the tooth portion of each sawblade is heat-treated to provide hardness, but hardening and resultant brittleness of both the core metal of the tooth portion and the entire shank portion of the blade are avoided to preserve their ductility and resistance to breaking. High frequency electrical induction heating of a discrete portion, rather than the entirety, of each blade enables the attainment of these objectives.

Claims10

Dependent claims

Improved apparatus for rapidly manufacturing multiple elongate sawblades from a continuous elongate band of metal having longitudinal edges and a predetermined width dimension, said apparatus comprising:

(a) a support structure;
(b) feeder means for feeding said band of metal longitudinally in successive increments along said support structure in a feeding direction while orienting the width dimension of said band of metal in a predetermined direction perpendicular to said feeding direction;
(c) rotary cutter means for forming sawteeth in one longitudinal edge of said band of metal;
(d) means for selectively advancing said rotary cutter means toward said support structure along a direction of advancement substantially perpendicular both to said feeding direction and to said predetermined direction so as to cause said cutter means to intersect one longitudinal edge of said band of metal;
and
(e) selectively-actuated severing means, located in a position following the position of said rotary cutter means along said feeding direction, for successively severing each respective sawblade from said band of metal concurrently with the advancement of said rotary cutter means toward said support structure along said direction of advancement.

3 more elements

Dependencies are inferred from the claim text.