Hydraulic valve housing
Machining requirements
- Fluctuating cast allowance situation
- Heavily interrupted cuts
- Avoid ring formation during boring and ensure safe chip removal from the housing
- Avoid macroscopic flaws on the control edges in the boring process
- Very high demands on form and position tolerance
- Constant stock removal before honing
- Take part variance and limited tool storage places in the machining concept into account
Control valves are mechanically or electronically actuated valves with several switch positions. Depending on the specified position of the spool along the control edges, a volume flow is set for operating the connected working equipment. The individual pressure compensator adjusts a constant load pressure drop via the supply control edge of the spool, so that a load pressure-independent volume flow control is achieved across the whole adjusting range, also in parallel operation (load compensation). The system must be leakage-free, to prevent accidental dropping of the load, even with parallel operation.
Bore machining
Application solutions
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
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
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
客户的初始情况
阀门外壳 EN-GJS-400-15 - 压力天平孔/珩磨加工
- 减少额外成本的要求
- 现有加工中心改装为 TOOLTRONIC
- 用于原型样板件制造以及中/小批量的珩磨加工
- 要求将珩磨流程对单独的机床不采用
客户的初始情况
阀门外壳 EN-GJS-400-15 - 完整加工
- 库存量高
- 刀具预调间中的工艺流程并非最优的和数据质量不完整
- 成本透明度不足够
- 专业人员普遍短缺造成较大的人力波动现象
- 发生断刀的问题
- 刀具成本高