Corpo valvola idraulica

Requisiti di asportazione truciolo

• Variazioni nella situazione di volume tagliato della ghisa
• Tagli fortemente interrotti
• Evitare che si formino anelli durante la barenatura e garantire un’asportazione sicura dei trucioli dal corpo
• Evitare che gli spigoli all’interno del foro cursore si rompano durante il processo di barenatura
• Requisiti di tolleranza per la forma e la posizione molto elevati
• Preparazione alla levigatura lasciando sovrametalli costanti
• Nel progetto di asportazione truciolo, considerare la molteplicità dei componenti e gli spazi limitati di stoccaggio degli utensili

Lavorazioni di fori

Foro cursore

Foro cursore

Il movimento relativo del cursore (Spool) lungo gli spigoli all’interno del foro cursore controlla la direzione del flusso del fluido.

Foro di compensazione della pressione

Compensator bore

Despite different loads on agricultural and construction machinery, the volume flow for the lifting and lowering speed on an excavator shovel, for example, must remain constant. If a low load is present, the spring-preloaded pressure compensator releases a smaller cross section, to keep the volume flow constant. With high loads, a larger cross-section is released. The working speed of the hydraulic cylinder connected to the excavator shovel thus always remains the same.

Additional bore machining

1__Tie rod hole 2__O-ring bore 3__Oil bore 4__Thread bore 5__Port hole 6__Check valve hole

• 
  1 / 6

  Tie rod hole

  Bore for tie rod, which keep the individual valve blocks together.
• 
  2 / 6

  O-ring bore

  Countersink for O-rings for sealing the plane surfaces between
  individual modules.
• 
  3 / 6

  Oil bore

  Oil channel for distributing the oil in the part.
• 
  4 / 6

  Thread bore

  Bores for fastening attachments.
• 
  5 / 6

  Port hole

  Bore for connecting the individual consumers to the valve block.
• 
  6 / 6

  Check valve hole

  Check valves for blocking a volume flow.

• 1__Tie rod hole 1__Tie rod hole
• 2__O-ring bore 2__O-ring bore
• 3__Oil bore 3__Oil bore
• 4__Thread bore 4__Thread bore
• 5__Port hole 5__Port hole
• 6__Check valve hole 6__Check valve hole

Application solutions

1 – Small and medium series with fixed tools

Initial situation at the customer

Valve housing EN-GJS-400-15 – spool bore

• Individual orders, smaller and medium quantities
• No option for tool setting
• Short cycle times required
• High machine hourly rates
• Stable oscillating honing available
• Tool concept adapted to several part versions

Details

2 – Large series with solid and adjustable tools

Initial situation at the customer

Valve housing EN-GJS-400-15 – spool bore and compensator bore

• Large-scale series
• Tool setting desired
• High machine hourly rates
• High costs for subsequent single pass honing

Details

3 – Small lot sizes – Reduced tool changes due to combination tools

Initial situation at the customer

Valve housing EN-GJL-300 – spool bore

• Small lot sizes
• Option for tool setting available
• Too many/frequent tool changes
• High machine hourly rates
• High effort due to single pass honing process

Details

4 – Flexible honing on the machining centre

Initial situation at the customer

Valve housing EN-GJS-400-15 – Compensator bore / honing

• Request for reduction of ancillary costs
• Existing machining centre re-tooled to TOOLTRONIC
• Honing for prototype manufacture, as well as small and medium-scale production runs
• Requirement for saving the honing process on separate machine

Details

5 – Tool management

Initial situation at the customer

Valve housing EN-GJS-400-15 – complete machining

• High inventories
• Processes in the tool-setting area not optimal, and incomplete data quality
• Cost transparency is not sufficient
• High fluctuation due to general lack of skilled workers
• Problems with tool breakage
• High tool costs

Details

Werkzeuglösungen