Threaded-Coupling Elements F 9.430

Application

Compared to other coupling elements the threaded coupling elements are very compact devices. lf the slide movement of the workpiece carrier is to be used or if a fixture is to be connected to the base plate without lines, the threaded nipple and the coupling mechanisms can be directly screwed into the parts which are to be connected. The coupling mechanisms have the advantage that they are flush-faced in uncoupled mode. Flange-type housings are available to simplify the manufacture of the fixture mounting hole contours. In cramped conditions it is possible to make and install the flange-type housing retrospectively. The fixture bodies which are to take up the coupling parts have to be guided 2–3 mm in a parallel motion before they are coupled. The axial forces which arise during the pressure build-up in coupled mode (see diagram) have to be absorbed outside the coupling parts. The threaded nipples, which are installed into the tank lines, are equipped with a pre-loaded valve (VSV). The pre-loaded valve limits a possible pressure build-up in the return line to approx. 5 bar by causing internal leakage in the hydraulic clamping elements. In coupled mode the pre-loaded valve is not effective.