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
Application solutions
1 – Small and medium series with fixed tools
お客様の初期の加工状況
バルブケース EN-GJS-400-15 - スプール穴
- 個別受注・小ロット・中ロット
- ツール調整機能なし
- ツールのリードタイムが短い
- 高い機械稼働率
- 安定した拡張ホーニングが可能
- 複数部品のバリエーションに適応するツールコンセプト
2 – ソリッドツールとアジャスト可能ツールを使用する大量生産。
3 – 少量生産 – コンビネーションツールによる工具交換の削減
4 – マシニングセンターでの柔軟なホーニング
お客様の初期の加工状況
バルブケース FCD-400-15 - 流量制御穴 / ホーニング
- 付帯費用の削減要求
- 既存のマシニングセンタをTOOLTRONICに変換
- プロトタイプから中小規模生産までのホーニング
- 別個マシンでのホーニング工程を削減する必要性
5 – ツールマネジメント
お客様の初期の加工状況
Ventilgehäuse EN-GJS-400-15 – Komplettbearbeitung
- Hohe Lagerbestände
- Prozessabläufe im Einstellraum nicht optimal und unvollständige Datenqualität
- Kostentransparenz nicht ausreichend
- Hohe Fluktuation aufgrund von allgemeinem Fachkräftemangel
- Probleme mit Werkzeugbrüchen
- Hohe Werkzeugkosten
Werkzeuglösungen
Pilotieren und Aufbohren
Steuerkantenbearbeitung
Reiben und Feinbohren
Fertigbearbeitung durch Honen
Fräsen
Spannen
