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我厂生产的130前制动鼓的凹模(见图一)拔模斜度按设计要求,不允许大于 1°30′。深度与内径之比是1:2.04。凹模材料为灰铸铁,工作表面粗糙度为Ra=1.6。
I produced 130 before the brake drum die (see Figure I) draft taper according to the design requirements, not allowed to more than 1 ° 30 ’. The ratio of depth to inner diameter is 1: 2.04. Die material is gray cast iron, the working surface roughness Ra = 1.6.