Method for forming hole in product

The invention relates to a forming method for a hole in a product, the product is provided with a groove, the forming method for the hole in the product comprises the steps that the hole communicating with the groove is formed in the product through a first cutter, and the forming direction of the hole is inclined relative to the transverse direction of the groove; a first cutter is used for conducting first-time removing treatment on burrs generated during hole forming in the circumferential direction of the hole with the first cutting amount; and a second tool with the single-side blade size larger than that of the first tool is used for conducting second-time removing treatment on the burrs in the circumferential direction of the hole with the second cutting amount, wherein the second cutting amount is larger than the first cutting amount. The first cutter and the second cutter are used for removing the burrs twice, so that the removal rate of the burrs is improved, the machining and production quality of