METHOD FOR WORKING THE EDGE OF A HIGH PRESSURE-RESISTANT PART, ESPECIALLY FOR THE HYDRO-EROSIVE ROUNDING OF AN EDGE AND CORRESPONDING DEVICE

摘要

The invention relates to a method for working the edge of a high pressure-resistant part, according to which the edge is hydro-erosively rounded off in a working step. The invention also relates to a method and a device for the hydro-erosive rounding of the edge of a high pressure-resistant part, especially the edge of a bore intersection of a high pressure-resistant part of a fuel injection system. According to said method, a liquid to which abrasives are added is directed across the edge that is to be rounded in the area of a first continued bore to a branching second bore. In order to optimize the result of the rounding process and thus in order to optimize the high pressure-resistance of the part, the edge (5) and the surfaces (4, 6) of the high pressure-resistant part (1) adjacent to the edge (5), before the step of hydro-erosive rounding, are subjected to compressive strains in the area of their surfaces by means of a grinding and/or honing method. The method and the device for the hydro-erosive rounding are improved by inserting an obturating element (9) in the continued first bore (2) behind the branching second bore (3), when seen from the main direction of flow (S) of the liquid (8) to which abrasives (7) are added, to deflect the liquid (8) to which abrasives (7) are added from the first bore (2) to the second bore (3).