Method of die construction using joint structure

Details Method of die construction using joint structure Method of die construction using joint structure

1976-03-22

1977-04-12

DiPalma, Victor A.

Metal working

Method of mechanical manufacture

With testing or indicating

29526, 83637, 83698, B23Q 1718

Patent

active

040172678

ABSTRACT:
Each one of a series of die parts is secured to and located within a precise position on a common die shoe by means of two joint structures. In each joint structure, a sleeve of a fixed length and diameter is telescoped with a slip fit into a longer opening extending through the die part and into the die shoe to precisely locate the die part on the shoe with respect to the other die parts and with respect to the shoe. The inside diameter of the sleeve is larger in diameter than the diameter of a screw which extends through the sleeve and is threaded into a hole in the die shoe to secure the part on the shoe regardless of whether the axis of the screw coincides precisely with the axis of the sleeve. When mounting the die part on the die shoe, the part first is clamped on the die shoe in an initially accurate position with a bore defining the portion of the opening in the die part serving to locate the position of the hole to be drilled and tapped in the die shoe. Once the hole is drilled and tapped in the die shoe, the screw is telescoped through the bore and threaded into the hole with an adapter captivated between the head of the screw and a shoulder in the bore to temporarily fasten the die part on the die shoe when the screw is tightened down. After all of the die parts are fastened temporarily to the die shoe in a similar manner, the accuracy of the initial positioning of the parts is checked and the parts are machined as required to be shifted into their precise positions with respect to each other and with respect to the die shoe. To complete each joint structure after clamping the part in its precise position on the shoe, the screw and adapter are removed and a second bore is machined in the die shoe utilizing the first bore as a guide to form the other portion of the opening regardless of whether the axis of the completed opening coincides with the axis of the hole. Then, the sleeve is telescoped into the opening to hold the part against moving horizontally out of its precisely located position and the screw is inserted through the sleeve and threaded into the hole to hold the part on the die shoe.

REFERENCES:
patent: 1982488 (1934-11-01), Weber
patent: 3178984 (1965-04-01), Burothy
patent: 3228262 (1966-01-01), Bennett
patent: 3550245 (1970-12-01), Davis
patent: 3588989 (1971-06-01), Hosea

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