Abstract: A fixture is mounted on a work platform and contains: a first movable block, a second movable block, an actuation block, multiple resilient elements, multiple first connection blots, and a threaded bolt. The first movable block includes a first body having a first tilted face, a first defining portion, and a first clamping face. The second movable block includes a second body having a second tilted face, a second defining portion, and a second clamping face. The actuation block includes a third body having a third tilted face, a fourth tilted face, at least one first abutting portion, at least second abutting portion, and a coupling orifice. The third tilted face corresponds to the first tilted face and has a third defining portion, and the third tilted face has a fifth slide section, a sixth slide section, and a third stop section.

Abstract: A zero-positioning mechanism of a metalworking machine contains: a base, a locking jig, and a pneumatic cylinder. The base includes at least one installation area. The locking jig includes a body, a slider assembly, and a fixing plate. The pneumatic cylinder includes the piston and a push unit. The body includes a through orifice, the slider assembly includes two pushers and four sliders. A respective pusher has a lower fringe, two beveled fringes, and multiple receiving orifices. A respective receiving orifice is configured to accommodate a respective one of multiple resilient elements. A respective slider is arranged on the respective beveled fringe of the respective pusher and has a conical positioning portion. The fixing plate includes a first face and a second face. The first face has multiple coupling apertures and four locking apertures, and the second face has a groove with multiple chutes.

Abstract: An auto-positioning hydraulic pneumatic fixture contains a base, at least one locking device, multiple pistons, multiple positioning modules, and multiple platforms. The base includes at least one installation zone for fixing at least one locking device. A respective one locking device includes a fixing module and a clamping module. The fixing module has a body, a connection segment, and an affix portion. The clamping module includes a positioning bolt and a pair of clamp units, and each clamp unit has a clamping face. The affix portion has a defining groove and a linear slot. The body has at least one tilted rail, and a respective one positioning module has a mounting unit and at least one locating unit. The mounting unit has two oblique faces and multiple fringes, and s respective one platform is configured to fix the respective one workpiece.