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3 Key Technique
3.1 Coupling of temperature，microstructure，stress and property
Heat treatment procedure is a procedure of temperature-microstructure stress interaction．The three factors can all influence the property ．During heating and cooling，hot stress and transformation will come into being when microstructure changes .Transformation temperature-microstructure and temperature—microstructure—and stress-property interact on each other．Research on the interaction of the four factors has been greatly developed ,but the universal mathematic model has not been built．Many models fit the test nicely，but they cannot be put into practice．Difficulties with most of models are solved in analytic solution，and numerical method is employed so that the inaccuracy of calculation exists． Even so，comparing experience method with qualitative analysis，heat treatment simulation by computer makes great progress．
3.2 Establishment and integration of models
The development procedure for die and mould involves Design ,manufacture，heat treatment，assembly，maintenance and so on．They should have own database and mode1．They are in series with each other by the entity relation model．Through establishing and employing dynamic inference mechanism ，the aim of optimizing design can be achieved．The relation between product model and other models was built．The product model will change in case the cell model changes．In fact，it belongs to the relation of data with die and mould．After heat treatment model is integrated into the system，it is no more an isolated unit but a member which is close to other models in the system．After searching，calculating and reasoning from the heat treatment database ,procedure for heat treatment，which is restricted by geometric model ,manufacture model for die and mould and by cost and property， is obtained． If the restriction is disobeyed， the system will send out the interpretative warning． All design cells are connected by communication network．
4 Conclusions
(1) Heat treatment CAD／CAE has been integrated into concurrent design for die and mould and heat treatment is graphed ,which can increase efficiency，easily discover problems and clear conflicts．
(2) Die and mould development is performed on the same platform． When the heat treatment process is made out，designers can obtain correlative information and transfer self-information to other design departments on the platform．
(3) Making out correct development schedule and adjusting it in time can enormously shorten the development period and reduce cost．
冲压模具已经被广泛应用于现在的工业生产中。传统的工业生产中，由于工序较多，往往工人们很努力工作，产量却十分低下。近年来随着科学技术的发展，冲压模具在工业生产中被越来越重视，并且在工业生产中得到越来越多的使用。冲压模具的自动喂料技术也被广泛应用与工业生产，冲压模具能提高生产效率以及减轻工人的工作负担，所以冲压模具对于技术发展和经济效益的提高都有很大的意义。
1 模具设计与制造
模具是制造业的重要工艺基础，在我国模具制造属于专用设备制造业。中国虽然很早就开始制造模具和使用模具，但长期未形成产业。直到20世纪80年代后期，中国模具工业材驶入发展的快车道。今年，不仅国有模具七夜有了很大发展，三资企业、乡镇（个体）模具企业的发展也相当迅速。
虽然中国模具工业发展迅速，但与需求相比，显然供不应求，其主要缺口集中于精密、大型、复杂、长寿命模具领域。忧郁在模具精度、寿命、制造周期及生产能力等方面，中国与国际平均水平和发达国家仍有较大差距，因此，每年需要大量进口模具。
中国模具产业除了要继续提高生产能力，今后更要着重于行业内部结构的调整和技术发展水平的提高。结构调整方面，主要是企业结构想专业化调整，产品结构向着中高档模具发展，向进出口结构的改进，中高档汽车覆盖件模具成形分析及结构改进、多功能复合模具和复合加工及激光技术在模具设计制造上的应用、高速切割、超精加工及抛光技术、信息化方向发展。