摘  要
随着中国工业不断地发展，模具行业也显得越来越重要。本文针对拖拉机机架框的冲压工艺性，分析比较了成型过程不同冲压工艺，确定用三幅单模完成落料、冲孔、弯曲的工序过程。介绍了拖拉机机架框冷冲压成形过程，且重点分析了坯料形状、尺寸，落料模、冲孔模、弯曲模的工作原理、工艺性、圆角半径、精度、工序、力的计算、间隙及凸凹模深度、压力机的选择，并给出了合理的模具总体设计。还具体分析了模具的主要零部件（如凸凹模、卸料装置、拉深凸模、垫板、凸模固定板等）的设计与制造，冲压设备的选用，凸凹模间隙调整和编制一个重要零件的加工工艺过程。列出了模具所需零件的详细清单，并给出了合理的装配图。通过充分利用现代模具制造技术对传统机械零件进行结构改进、优化设计、优化工艺方法能大幅度提高生产效率，这种方法对类似产品具有一定的借鉴作用。
关键词：拖拉机机架框；冷冲压；模具装配图；三维建模
 ABSTRACT
With China's industries continue to develop and die industry is also becoming increasingly important. This article in view of the tractor frame box stamping technology, analyses and compares the different forming process of stamping process, determine three photos with single mode complete blanking, punching, bending process process. Introduced the tractor frame box cold stamping process, and analyses the blank shape, size, blanking mold, punching die bending die, the working principle, technology, fillet radius, the precision and the working procedure, force calculation, clearance and die and punch depth, the choice of the press, and gives the rational mould overall design. For the process, the center of pressure, the die size and the tolerance of the calculation, design mold. Also analyzes the mold of the main components (such as punch and die and dump devices, drawing punch, slates, Punch plate, etc.) design and manufacturing, stamping equipment selection, punch-gap adjustment and establishment of a vital parts machining process. Die requirements set out a detailed list of parts, and gives a reasonable assembly. By fully utilizing modern manufacturing technology to mold traditional mechanical parts for structural improvements, design optimization, Process optimization methods can greatly enhance production efficiency, the method of similar products have some reference.
Keywords: Tractor frame dialog; Cold stamping; Mold assembly drawing; 3 d modeling