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就仪器、仪表等机械行业常用的带有小孔零件的成形工艺进行了分析研究,针对某光学显微镜上粗动手轮这一典型零件进行力能计算分析,提出了用镦挤成形内斜小孔取代机械加工。该成形模具结构简单紧凑,可一次成形外形及小φ7的带斜度小孔,且成形精度高,模具采用镶套结构,可一模多用,降低了模具成本,缩短了生产周期。该模具具有两个凸模,凸模1将斜孔台阶的成形、定位、顶杆等集于一体,减少或消除了壁厚差,排气孔的巧妙设计,保证了金属的充填性。凸模2主要是传递挤压力用于成形,其上没有让位孔,保证了其必要的行程和两个凸模中心的一致性,保证了产品的成形精度,通过实验和现场生产应用表明:该模具结构合理,产品精度高,材料利用率提高一倍,机加工时减少了60%以上,具有较高的经济价值和广泛的实用性。
On the instruments, instruments and other machinery industry commonly used with small hole parts of the forming process were analyzed for a light microscope rough handwheel on the typical part of the force calculation and analysis of the proposed extrusion extrusion with oblique hole Replace machining. The forming mold has the advantages of simple and compact structure, forming profile and small-sized hole with small diameter of φ7 at one time, and high forming accuracy. The mold is inlaid sleeve structure, which can be used more than one mold, reducing the mold cost and shortening the production cycle. The mold has two convex molds. The convex mold 1 integrates the forming, the positioning and the top bar of the inclined hole steps to reduce or eliminate the difference of the wall thickness. The clever design of the exhaust holes ensures the metal filling property. Punch 2 is mainly used to transmit the extrusion pressure for forming, there is no relief holes to ensure that the necessary stroke and the center of the two punch consistency, to ensure the accuracy of the product forming, experiments and field production applications that : The mold structure is reasonable, high precision products, material utilization doubled, machining reduced by 60% or more, with high economic value and a wide range of practicality.