Patent ID: 11933410
Assignee: ZF FRIEDRICHSHAFEN AG
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 0:
1. A method for producing a base body (100) of a valve housing (105) for a hydraulic control valve, comprising:
providing a plurality of valve pockets (120, 130, 140, 150) in the base body (100) from a coupling side, the valve pockets (120, 130, 140, 150) configured for guiding a hydraulic fluid, the valve pockets (120, 130, 140, 150) delimited and/or separated from one another by web sections (180); and
providing a valve spool chamber (110) in the base body (100), the valve spool chamber (110) configured for receipt of a valve spool, the valve spool chamber (110) defining a longitudinal axis (L), the valve spool chamber (110) extending through at least one web section (180) to form a web exit opening (200), the web exit opening (200) opening into a machining valve pocket (190) of the valve pockets (120, 140), the web exit opening (200) circumferentially delimited by a control edge (170), the control edge (170) formed by a spool guiding section (210) and a front-side section (220),
wherein an unmachined base body (240) comprises a web wall area (250) in the machining valve pocket (190), the web wall area (250) comprises an unmachined front-side section (260) and a residual web wall section (270), and the unmachined front-side section (260) protrudes axially over the residual web wall section (270) with respect to a spool direction and/or the longitudinal axis (L),
wherein the front-side section (220) of the control edge (170) is machined into the unmachined base body (240) for the base body (100) with a cutting process during a front-side machining,
wherein the cutting tool (220) is guided from the coupling side through the machining valve pocket (190) to the front-side section (220) of the control edge (170) in the cutting process.