Large press manufacturers analyze its operation process for you

The large press manufacturers will analyze for you how to better satisfy our market demand?

There is margin for the positioning surface of the positioning element of the large press. After the fixture is installed, the positioning surface is finely ground. The supporting plate and supporting nails all adopt this method. In order to make the support reliable on the fixture, the press often uses 4, 6 or more support plates (or support nails) to support the precision datum of the workpiece. For this reason, the top surface of the press must be kept strictly in a plane. Using the method of fine grinding the positioning surface after assembly, the press makes the positioning reference size directly obtained from the processing, so the accuracy is very high. This method assembles the chain without directly affecting the positioning reference degree of the fixture, but the press must ensure that the assembly error does not exceed the range of the fine grinding allowance. In addition, the reference surface must be reground when replacing the positioning parts. Most of the reference planes of precision fixtures use this method to obtain high positioning accuracy.

The final positioning of the large-scale press locomotive fixture is also based on the Morse taper surface, and the reference plane for positioning the 132 workpieces is precision ground to ensure the coaxiality of 0.007 mm. The machine tool is used to process the central tool to ensure the accuracy of the relative position of the machine tool and fixture. Lathe fixture for processing rocker. The rocker of the press has a maximum diameter of 3 and a length of 108 mm. It is a slender shaft. The end of the press is not allowed to have a center hole. The raw material is cold drawn steel wire. The outer diameter and roughness are good. The pressing machine turns the lure 2 external jig in this process like a tool holder, which is installed on the small carriage of the lathe. The press uses two positioning pins to determine the relative position of the fixture and the small carriage, and tighten them with screws. One end of the work piece of the press is rotated by the clamping belt of the collet chuck on the main shaft of the lathe, and the other end of the press is extended through the clamp hole. The fixture moves with the tool holder during processing. When the press machine requires the function of the fixture to be coaxial with the turning center of the lathe spindle, the positioning hole must be directly cut on the lathe, and two positioning pins are used to locate the square tool post. So every time you use it, just re-install the positioning pin, the press can ensure that the holes on the fixture are coaxial with the turning center of the lathe