The axial flow fan aluminum alloy case was taken as an example.According to the easy deformation characteristics of the thinwalled shell parts in radial clamping,the excellent performance and application value of the rapid clamping fixture,the pneumatic clamping collet and the wedge clamping fixture were introduced in detail.The common features of these type fixtures are not only reliable positioning and clamping,easy to install and dismantle the workpiece,but also the passrate of production and production efficiency have been greatly improved.In the production of micro motor especially small fan casing or thin wall parts such as special end cover,they have a certain expanding application significance.