Car buckle a kind of throat hoop (hose clamp), widely used in vehicles, large tractors, electric forklifts, electric locomotors, ships, etc., is the ideal connection standard parts, the buckle in the throat hoop is the use of stamping grinding tools to carry out stamping on the steel belt. At present, the production process needs to press the steel strip first, press the original appearance of the buckle, and then press the sheet metal again for buckle production. The whole process needs to be pressed twice, and when the second stamping begins, the product must be placed accurately manually, which greatly affects the work efficiency.