Drilling mould for flange connection hole at side of butterfly valve
A connection hole, butterfly valve side technology, applied in the field of drilling molds for flange connection holes on the butterfly valve side, can solve problems such as difficulty in ensuring the interchangeability of the flange connection holes on the butterfly valve side, inability to ensure accuracy, and difficulty in moving workpieces. Achieve the effect of eliminating the fitter marking process, saving production costs and ensuring interchangeability
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[0011] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. As shown in the figure, a butterfly valve side flange connection hole drilling tool is mainly composed of an annular drilling tool body 1 and a drilling mold 2, and drills are evenly arranged on the annular surface of the drilling tool body. Die connecting hole 3, the said drilling die and the drilling die connecting hole have an interference fit or adopt a taper fit, and the outer circle of the drilling die is provided with a taper and cooperates with the taper of the drilling die connecting hole. The concentric circle on one side of the drilling tool body is provided with a stepped circular stop 4 matching the diameter of the inner hole of the butterfly valve. Another row of die connection holes is provided on the inner concentric circle of the die connection hole on the annular surface of the drilling tool body, wh...
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