Method for manufacturing a main body of a valve housing for a hydraulic control valve, and valve housing having the main body

Patent metadata

Field	Value
Publication number	US-11933410-B2
Application number	US-201916972295-A
Country	US
Kind code	B2
Filing date	Jun 3, 2019
Priority date	Jun 5, 2018
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

A method for producing a base body of a valve housing for a hydraulic control valve includes machining a front-side section of a control edge into an unmachined base body for the base body with a cutting process in a front-side machining step. In the cutting process, a cutting tool is guided from a coupling side through a machining valve pocket to the front-side section of the control edge.

First claim

The invention claimed is:

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.

2. The method of claim 1 , wherein the cutting process comprises a milling process, the cutting tool comprises a milling tool, and the milling tool 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 milling process.

3. The method of claim 1 , wherein the cutting process comprises a laser cutting process, the cutting tool comprises a laser beam, and the laser beam 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 laser cutting process.

4. The method of claim 3 , wherein the cutting process comprises a laser cutting process and a milling process, the method further comprising:
pre-machining with the aid of the milling process; and
finishing or re-working with the laser cutting process.

5. The method of claim 3 , wherein the cutting process comprises a laser cutting process and a milling process, the method further comprising:
pre-machining with the laser cutting process; and
finishing or re-working with the milling process.

6. The method of claim 1 , wherein:
the cutting process comprises a cylinder machining;
providing the valve spool chamber ( 110 ) comprises introducing and/or machining the valve spool chamber ( 110 ) into the unmachined base body ( 240 ); and
the cylinder machining is carried out before or after the front-side machining in order to produce the spool guiding section ( 210 ) of the control edge ( 170 ).

7. The method of claim 1 , further comprising forming the unmachined base body ( 240 ) with a shaping process.

8. The method of claim 7 , wherein the unmachined front-side section ( 260 ) is configured as a draft for the shaping process.

9. The method of claim 1 , wherein the front-side section ( 220 ) extends radially with respect to a spool direction and/or the longitudinal axis (L).

10. A valve housing ( 105 ), comprising the base body ( 100 ) produced according to the method of claim 1 .

11. A valve housing ( 105 ) for a hydraulic control valve, comprising:
a base body ( 100 );
a plurality of valve pockets ( 13 , 140 , 150 ) formed in the base body ( 100 ) from a coupling side, the valve pockets ( 13 , 140 , 150 ) configured for guiding a hydraulic fluid, the valve pockets ( 13 , 140 , 150 ) delimited and/or separated from one another by web sections ( 180 ); and
a valve spool chamber ( 110 ) formed 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 ) extends 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 the front-side section ( 220 ) of the control edge ( 170 ) of the base body ( 100 ) is produced with a cutting process, and a cutting tool 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, and
wherein the base body ( 240 ) comprises a web wall area ( 250 ) in the machining valve pocket ( 190 ), the web wall area ( 250 ) comprises a front-side section ( 260 ) and a residual web wall section ( 270 ), and the 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).

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Maurer Patrick
• Scholl Herbert

Classifications

• F16K11/0716 Primary

  with fluid passages through the valve member (F16K11/0704, F16K11/0708, F16K11/0712 take precedence) · CPC title

• F16K27/041

  cylindrical slide valves · CPC title

• B23K26/38

  by boring or cutting · CPC title

• F16K11/07 Primary

  with cylindrical slides · CPC title