Metal tools and implements – making – Saw-making or furbishing device or machine
Patent
1990-05-02
1992-03-03
Parker, Roscoe V.
Metal tools and implements, making
Saw-making or furbishing device or machine
76112, B23D 6300
Patent
active
050922025
ABSTRACT:
Apparatus for securing hard material tips to the teeth of a cutter tool includes a carrier unit for presenting an end of a rod of the tip forming material to a tooth to be tipped, a spring for exerting pressure between the tip forming material and the tooth to be tipped during a welding operation such that the end can be welded to the tooth with the tip forming length positioned with respect to the tooth at substantially the rake angle for the tip. Following the welding operation the rod or bar is severed from the end thereof attached to the blade tooth in such manner that the cut surface defines the top face of the tip.
The carrier unit brings the lower end of the bar into contact with the tooth that is located at the welding station to hold the lower end in place during the welding operation. The tooth is heated to such a temperature that the tooth melts in the immediate vicinity of the location where the tip is to be located and secured in place so that the bar end is pushed into the molten tooth metal to form a seating notch. Since the pressure being exerted upon the tip forming length is always maintained by the spring use can be made of the position of the carrier unit to determine the degree of penetration of the tip forming length into the tooth. A combined limit stop and switch unit is provided for setting the depth of penetration and also for stopping the welding process as soon as the required degree of tip length penetration has been attained.
REFERENCES:
patent: 3034378 (1962-05-01), Anderson
patent: 3295396 (1967-01-01), Kolb
patent: 4949599 (1990-08-01), Iseli
Iseli & Co. AG
Parker Roscoe V.
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