Automatic spreading and linking clamping mechanism

The invention discloses an automatic spreading and linking clamping mechanism comprising a fixture body, locating slide blocks and an inclined wedge mandrel, wherein the fixture body takes the shape of an inverted 'T'; slide block installation slots used for installing locating blocks are evenly distributed on the external circumference of a vertical boss which is perpendicular to a horizontal base on the fixture body; spring installation slots used for connecting adjacent slide block installation slots are also arranged on the same horizontal position with the slide block installation slots;a through hole used for installing the inclined wedge mandrel is arranged along the axial direction of the fixture body; the locating slide blocks are cuboids with one surface being an inclined surface; spring installation slots are also arranged on the surfaces opposite to the inclined surfaces; and an external screw thread is arranged at one end of the inclined wedge mandrel, a guide keyslot used for location and installation on the fixture body is arranged in the middle of the inclined wedge mandrel, and conical surfaces matched with the inclined surfaces on the locating slide blocks are arranged at the other end of the inclined wedge mandrel. The automatic spreading and linking clamping mechanism with the special structure adopts self-centering spreading and clamping, can achieve linking, have reliable processing quality, and improve the productivity and processing accuracy.