30.05.2023

油圧バルブハウジングの精密フィッティングソリューション

個々の製造状況に合わせた加工ソリューション

油圧バルブハウジングの製造は、フルードパワー技術の世界では最高の分野です。マパールは技術パートナーとして、は完璧なプロセス設計でお客様をサポートします。マパールの専門家は、機能的な穴加工時のコスト要因に特に注意を払います。ホーニング、加工ワークの要求項目、およびバッチサイズに基づき、お客様との対話を通じて最適な加工戦略を設計します。

既存のお客様のためにすでに実装されたアプリケーションに基づいて、MAPALは油圧バルブハウジングのための特別なソリューションを開発しました。これらのソリューションは、多くのお客様の加工ワークのご要望を反映しています。スプール穴加工におけるマパールの専門知識は長年にわたって高い評価をいただいています。スプールの寸法は、作動油が漏れることなく必要な方向にのみ流れることができるように、穴の精度が非常に大切です。最新の油圧バルブでは、この寸法は非常に厳しく定義されています。そのため、この穴の真円度、円筒度、真直度、表面品質は非常に重要になってきます。

実際にマパールは個々の生産状況に対応しています。常に最もコスト効率の良い工程を実現できるように、これらの工具を設計しています。前加工や中仕上げ加工を迅速に完了させ、ホーニング加工などの後工程にも目を配っています。

The production of hydraulic valve housings is the supreme discipline in the world of fluid technology. Great attention is paid to the quality of the main bore.   ©MAPAL

Application solutions for every situation

The first of the solutions presented for the machining of a hydraulic valve housing is rather unusual for MAPAL, as it does not include a fine boring tool for finishing. After piloting, boring and circular milling of the spool bore, in this instance, a multi-bladed reamer performs the final machining step before honing. With its selection of tools, MAPAL demonstrates that some tasks can be tackled with a high degree of accuracy without the need for an adjustable special tool. The concept is particularly suitable for smaller and medium quantities.

If large quantities and high levels of accuracy are sought in series production, the second application solution is the right blueprint. The key difference is the fine boring tool used for fine machining. It meets the high standards for spool bore and compensator bore production. The EasyAdjust-System and guide pads offer reliable fine machining with easy handling. As the customers’ technology partner, MAPAL defines with them the extent to which a concluding honing process can be scaled down or even omitted.

Machining solution for the series production of valve housings in large quantities. The fine boring tool with EasyAdjust-System and guide pads offers reliable fine machining with easy handling.   ©MAPAL
If the part needs to be machined on two sides due to its tolerances, the third solution comes into play. For piloting and boring, MAPAL uses a multi-staged boring tool with radial and tangential indexable inserts. It handles pre-machining of the spool bore and completion of contours in one go. A solid carbide profiling tool processes control edges in a defined way and without flaws. The following fine boring tool with adjustable indexable inserts and guide pads eliminates the axial offset caused by machining from two sides. This could not be achieved to this level of quality with a multi-bladed reamer.
If machining must be done from two sides due to valve housing tolerances, MAPAL recommends a three-stage process for the spool bore.   ©MAPAL
Application solution 4 introduces into fluid power technology the kind of flexibility that is primarily required for small series and prototype building. The mechatronic tool system TOOLTRONIC makes it possible to perform the honing process via an additional axle on the machining centre. This allows all machining to take place in a clamping setup on one machine. Machining with TOOLTRONIC achieves high surface quality and dimensional accuracy with the tightest manufacturing tolerances and high flexibility. Burr-free, rounded transitions are created and there are no errors due to converting to the honing machine. For small quantities, a classic single-blade reamer from the standard range can be used for bore machining instead of a custom tool. In this instance, rapid availability and lower tool costs compensate for the slightly longer machining time.

Kathrin Rehor, PR Project Manager at MAPAL

Contact

Kathrin Rehor Public Relations Kathrin.Rehor@mapal.com Phone: +49 7361 585 3342


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