Hydraulic valve housing
Everything depends on the main bore. Manufacturing valve housings is the supreme discipline in the world of fluid power. For years, MAPAL’s expertise has been in demand for the spool bore. The gap dimension with the spool depends on the accuracy of this bore, so that the hydraulic oil can only flow in the required direction without leaking. This is very narrowly defined in modern hydraulic valves. The roundness, cylindrical form, straightness and surface finish of this bore are therefore crucial.
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
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
应用解决方案
1 – 使用固定刀具实现中、小批量
2 - 使用固定和可调刀具实现大批量
3 - 小批量 - 通过使用组合型刀具减少刀具更换次数
4 - 在加工中心上的灵活珩磨
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
5 - 工具管理
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
刀具解决方案
打导向孔和镗孔
控制刃口加工
Alésage et alésage de précision
Usinage final par pierrage
Fraisage
Serrage
