Abstract A machine for brazing carbide tips onto the cutting teeth of circular saw blades comprising a vertical saw support jig attached to a cabinet enclosing carbon arc brazing apparatus therein. A first electrode is attached to the saw which is urged in a direction so that a carbide tip disposed against a saw tooth is forced into engagement with a second (carbon) electrode. A clearance gauge assures proper lateral placement of the tip against the saw tooth. The carbon arc brazing apparatus includes a variable rheostat calibrated to show differing saw thicknesses, at indices where the brazing area is brought to desired proper temperature related to the indicated saw thickness. A timer thermostat is used in the brazing circuit to prevent excess heat in the brazing area. The method for brazing a carbide tip to a circular saw tooth edge includes placing the saw in a jig, inserting a carbide tip to be brazed between a carbon electrode and the saw tooth, retaining the tip against the tooth by weight of a brazing electrode attached to the saw outside of the brazing area, brazing by moving a silver solder rod about the junction of the tip and saw tooth, and trimming the brazed, tipped saw tooth to a cutting edge.
A method of brazing a hard tip to a saw tooth of a circular saw blade comprising the steps of placing the circular saw in a jig, inserting a hard tip between a saw tooth and a brazing electrode, retaining the tip against the saw tooth by means secured to the blade to rotationally urge the tooth with said tip against the brazing electrode, bringing the tooth and tip at least at their junction to a temperature level for brazing by electrical power means, and brazing the tip to the tooth by moving a rod of silver solder about the junction of the tip and tooth.
Claim 2
Independent Claim
106 words
A method of brazing a hard tip to a saw tooth of a circular saw blade comprising the steps of placing the circular saw in a jig, inserting a hard tip between a saw tooth and a brazing electrode, retaining the tip against the saw tooth by means secured to the blade to rotationally urge the tooth with said tip against the brazing electrode, bringing the tooth and tip at least at their junction to a temperature level for brazing by electrical power means, and brazing the tip to the tooth by moving a rod of silver solder about the junction of the tip and tooth.
Claim 3
Dependent Claim
29 words
The method of saw tooth brazing of claim 1, including the further step of grinding the hard tip to a sharp cutting edge upon completion of the brazing step.
Claim 4
Dependent Claim
34 words
The method of saw tooth brazing of claim 1, wherein the steps of retaining the tip against the saw tooth includes centrally positioning the hard tip on the saw tooth by preset guage means.