Machining method for valve plate of butterfly valve

The invention belongs to the field of butterfly valve plate machining, and particularly relates to a butterfly valve plate machining method which comprises the following steps: step 1, milling a steel plate to obtain a circular steel plate; secondly, the edge of the circular steel plate is ground and polished; thirdly, the circular steel plate is drilled, and the valve plate is obtained; fourthly, the valve plate is placed in a machining device; 5, the valve plate is subjected to air tightness testing through the machining device, and the notch damage position of the valve plate is marked; sixthly, the valve plates which do not reach the qualified standard are recycled and repaired; and 7, the tested valve plate is subjected to anti-corrosion treatment, and the butterfly valve plate is obtained. According to the method, when the valve plate of the butterfly valve is machined, air tightness testing can be directly carried out on the valve plate, and time is further saved. 本发明属于蝶阀阀板加工领域，尤其涉及一种蝶阀阀板的加工方法，该方法包括以下步