Method for the production of sawblades, especially jigsaw or sabresaw blades

DETAILED DESCRIPTION 1.
A sawblade, especially a jigsaw blade, characterized by comprising a blade body incorporating a cold swaged relief groove on each side surface thereof and by a cold swaged preformed slot in said blade body, and further characterized by having a toothed insert fastened into said 2.
A method for the production of saw blades, characterized by the step of forming in one continuous, but segmented cold die-swaging operation, a blade body with unset teeth along a cutting edge thereon and with a cold-swaged relief area, extending along said cutting edge on opposed side 3.
A method as defined in claim 2, characterized by cold swage-forming said relief area as a concave relief configuration on each side surface along 4.
A method for the production of saw blades, especially jigsaw blades, characterized by the steps of cold die-swaging an elongate basic blade body with a cold swaged longitudinal groove on each side surface thereof and with a slot formed on the edge normally reserved for cutting teeth and subsequently affixing in said slot a pre-formed toothed insert.




Description:
The present invention relates generally to sawblades, and more particularly, to the production of sawblades, especially jigsaw or sabresaw blades, but also circular, hand, and machine sawblades.
With the use of motor-driven sawing machines with vertical or horizontal reciprocal action there is often the risk of blade breakage due to the instability of hand-operated power tools, the difficulties involved in guiding the blade through materials and at the same time avoiding binding and burning.
It is therefore of critical importance that replacement blades can be manufactured at an optimum low price with due regard for quality and function.
In connection with a cutting operation there is an inevitable build-up of debris or chips in the blade base or gullet, thereby reducing the cutting properties considerably.
There is also the effect of pressure or a tendency of the work-piece to bind together in the space or kerf created in the wake of the teeth's path through the workpiece