The rise of the Flexible Manufacturing System (FMS) and the Computer Integrated Manufacturing System (CIMS) put forward a more urgent need for the practical fixture design software. 3D Visual Basic-based standard parts library is proposed in this paper. By calling the Application Program Interface (API) functions of Solidworks as the secondary development, the 3D standard parts library is established. And then the application program is made as plug-in to hanging onto the menu of Solidworks operating environment. When the assembly design starts, users can select the standard parts they need by clicking Solidworks menu. And then the application program can automatically query all the data required for drawing pictures. Finally the 3D entities of standard parts are generated so that they can be adopted for the assembly environment.

The hydraulic transmission control system in the metal forming equipment makes the piston rod freedom movement. This paper introduces that using PLC but not original relay contact to realize the free movement of the piston rod. Adopting PLC as the control system, the automation degree of the piston rod will be improved. And also ensure the piston rod has a high reliability when it has continuously acting, the system will meet the requirements of the general and flexibility. This paper analyzes the action of the hydraulic system. Subsequently, the methods of the hardware selection and the software program design were illustrated.