New Torque-controlled Pneumatic Wrench And It's Parameterized CAD

Pneumatic wrenches have been a staple of assembly lines because they quickly and powerfully apply torque to thread fasteners. But there is a problem that pneumatic wrenches cannot control output torque. The present ways of controlling torque of pneumatic tools are analyzed and a simple torque-controlled device presented is of controlling torque by means of theory analysis and experiment. A new. torque-controlled pneumatic wrench is designed on base of torque-limited device. It can effectively control output torque and automatically shut down the motor when output torque is equal to preconcerted torque, which solves the problem. At the same time, the CAD system of pneumatic tools is developed on the base of commercial 3D CAD software—Solid Edge, which has a good interface, calculate the parameters of pneumatic tools, parameterized design parts and subassemblies and get corresponding drawings. In addition, this paper discusses the realization of viewing parts, assemblies and drawings on browser using Web technology to support tele-design and service.