Patent ID: 8528879
Filing Date: 2013-09-10
Classification: B21D,B23P,B60T,F16B,F16K,Y10T

Abstract:
1. A valve cartridge for a magnet valve comprising: a pole core and a valve sleeve, wherein the pole core includes i) a first portion having a first outer diameter that corresponds to a press-fit outer diameter, ii) a second portion having a second outer diameter that is less than the first outer diameter, and iii) a joining portion interposed between the first portion and the second portion and having an outer diameter that narrows from the first portion to the second portion, wherein the first portion of the pole core is press-fitted into the valve sleeve through an opening in an end portion of the valve sleeve and the second portion projects out of the valve sleeve from the opening, wherein the joining portion is introduced into the valve sleeve along with the first portion, wherein the valve sleeve is joined to the joining portion of the pole core, wherein the pole core and the valve sleeve are connected to one another in high-pressure-proof fashion by a method comprising the following steps: inserting the pole core in a two-part press-fitting tool; which tool includes a middle die and an outer die, so that a joining gap is created between an inner bore of the outer die and the pole core inserted therein, placing the pole core against the valve sleeve and introducing the valve sleeve into the joining gap, simultaneously pressing down the middle die and the outer die with the pole core, so that the valve sleeve passes through the joining gap in a working direction, wherein the valve sleeve on reaching the press-fit diameter of the first portion of the pole core is widened and reshaped in the joining gap between a first reshaping edge and a second reshaping edge and joined to the joining portion of the pole core, and wherein a diameter of the inner bore narrows between the first reshaping edge and the second reshaping edge.