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．
3.3 Management and harmony among members
The complexity of die and mould requires closely cooperating among item groups．Because each member is short of global consideration for die and mould development，they need to be managed and harmonized．Firstly, each item group should define its own control condition and resource requested, and learn of the request of up-and-down working procedure in order to avoid conflict．Secondly，development plan should be made out and monitor mechanism should be established．The obstruction can be duly excluded in case the development is hindered．
Agile management and harmony redound to communicating information， increasing efficiency，and reducing redundancy．Meanwhile it is beneficial for exciting creativity，clearing conflict and making the best of resource．
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．
传统模具设计主要是依照自身实践经验或依照部分实践经验，而不是制造工艺。在设计完成之前，模具方案通常要被一次又一次的改进，于是有些缺点便出现，例如开发时期长，成本高和实际效果不明显。由于对精确性、使用寿命、开发期和费用的严格要求，先进的模具要求设计和制造得十分完善。因此越来越先进的技术和创新方法被应用其中，例如并行工程、敏捷制造业、虚拟制造业、协同合作设计等。
模具的热处理与模具设计，制造和装配同样重要。因为它对模具的制造装配和使用寿命又及其重要的影响。模具设计与制造发展十分迅速，但是热处理发展却严重滞后它们。随着模具工业的发展，热处理必须保证模具有良好的制造装配和磨损耐热性能。不切实际的热处理将导致模具材料过硬或过软，同时影响模具装配性能。传统的热处理工艺是按照设计师提出的方法和特性制作出来的。这样会使模具设计师和热处理工艺师意见产生分歧，而模具设计师却不能充分地了解热处理工艺和材料的性能，相反热处理工艺师却很少了解模具的使用环境和设计思路。这些分歧将在很大程度上影响模具的发展。因此，如果把热处理工艺设计放在设计阶段之前，则缩短开发周期，减少花费和保证质量等目标将会被考虑，而且从串行到并行的发展模式也将会实现。 模具结构并行设计的热处理工艺英文文献和中文翻译(3):http://www.751com.cn/fanyi/lunwen_6186.html