[EN] Bosch Rexroth Web Seminar: Hydraulic Manifolds - Opportunities by Additive Manufacturing

Introduction to the Hydraulics Webinar

Welcome and Overview

• The webinar is hosted by Stefan Jena, with Johannes Huss as a guest speaker, focusing on hydraulic manifolds and manufacturing.

• The format of the webinar is explained, emphasizing its relevance due to canceled exhibitions and the opportunity for interaction.

• Participants are encouraged to engage through live chat for questions and feedback during the session.

Participant Engagement

• An initial poll is conducted to identify whether participants are machine manufacturers or users, revealing a majority of manufacturers among 110 attendees.

• Attendees are invited to share their industry sectors in another poll, with categories including oil, gas, trains, power, offshore, cement industry, and civil engineering.

Understanding Hydraulic Manifolds

Importance of Manifolds

• A question about the type of manifold required by participants highlights interest in customer-specific versus standard catalog options.

• Johannes Huss introduces himself as the product manager for industrial manifolds and discusses their production location within C&R Mein.

Modernization of Manifold Technology

• A comparison is made between traditional manifold designs (resembling outdated technology from past decades) and modern advancements that enhance functionality.

• The manifold is described as "the brain" of a hydraulic system; it directs oil flow essential for machine operation.

Functionality Insights

• The significance of manifolds lies in their control capabilities; without them, hydraulic systems would lack direction despite having power units and actuators.

• Conventional manifolds will be discussed further to understand participant requirements better.

Understanding Manifold Needs and Design

Inquiry on Quantity Requirements

• The discussion begins with a question regarding the annual quantity of manifolds required by participants, highlighting a lack of serious requests for large quantities. Participants are encouraged to specify if they need more than 10 units or just single pieces.

Application Context and Series Demand

• It is noted that the application sector influences demand; fewer participants from large industries may explain the high series request. A series of 10 is considered significant in industrial manifolds compared to mobile applications.

Feedback Collection from Participants

• Approximately 60 people voted on their needs, with an emphasis on gathering feedback to better understand participant requirements as there are currently 140 attendees. This engagement aims to tailor solutions effectively.

Supply Needs for Manifolds

• The next question addresses how participants procure manifolds: whether they buy them separately or as preassembled units from suppliers. Initial results show a balanced preference leaning slightly towards preassembled units, which was unexpected by the speaker.

Design Responsibilities Among Participants

• A query about design responsibilities reveals that many participants either design their own manifolds or rely on suppliers, indicating a balance in approaches among attendees. Those designing their own face unique challenges, especially for larger projects.

Exploring Key Factors in Industrial Manifolds

Importance of Design Considerations

• Before delving into conventional solutions, it’s crucial to identify what factors are most important when considering industrial manifolds—size and compactness emerge as primary concerns among participants alongside maintenance needs.

Conventional Solutions Overview

• The conversation shifts towards conventional manifold design processes, emphasizing the importance of ensuring products meet specific requirements such as size and functionality through established design practices developed over decades.

Expertise in Manifold Design

• Designers dedicated solely to manifold creation contribute significantly to quality and standardization due to their extensive experience and focus on this niche area within engineering practices spanning six decades.

Integration of Manufacturing and Design

• A strong link between manufacturing processes and design specifications is highlighted; utilizing databases for valve patterns enhances quality assurance by allowing precise manufacturing according to detailed designs rather than relying solely on paper documentation.

Simulation Methods for Quality Assurance

• The use of simulation methods (FEM and CFD) before production ensures accuracy in meeting project specifications, particularly critical for sensitive deliveries where first-time correctness is paramount in manufacturing outcomes.

Experience and Expertise in Manufacturing

Importance of Experience

• The presence of gray hair among the team signifies valuable experience, essential for manufacturing processes that have been refined over six decades.

• The company emphasizes its capability to deliver quality products regardless of lot size, showcasing flexibility in production.

Testing and Assembly Process

• The assembly and testing phases are critical, with a focus on maintaining high standards through expert involvement.

• Quality assurance is prioritized, ensuring consistent delivery irrespective of production scale.

Exploring Additive Manufacturing

Introduction to New Technologies

• Transitioning from conventional methods to discussing additive manufacturing as the "brain" of hydraulic systems.

• Questions arise about the applicability of 3D printing technology in industrial settings versus personal or academic use.

Practical Experience with 3D Printing

• Participants are queried about their personal experiences with 3D printing, indicating a growing familiarity within private sectors.

• Expectations from this technology include higher quality outputs, reduced complexity, and cost efficiency.

Expectations and Future Applications

Anticipated Benefits

• Participants express hopes for improvements such as lightweight designs, complicated shapes, and overall efficiency gains.

• A commitment is made to share insights from the webinar on social media platforms for broader access.

Selective Laser Melting Process

Overview of Technology

• Selective laser melting is introduced as a method for creating complex metal shapes using lasers to fuse metal powder.

• While impressive at small scales (e.g., toy-like models), current applications may not yet be suitable for larger industrial needs.

Material Considerations

• Current materials used include standard steel; however, there’s potential for future advancements in material capabilities.

Binder Jetting Procedure

Innovative Production Techniques

• Discussion shifts towards binder jetting as a method for producing larger manifolds using sand molds instead of traditional materials like plastics or metals.

Process Explanation

• A video demonstration is prepared to illustrate the detailed steps involved in this innovative manufacturing process.

Foundry Insights

Key Steps in Production

• A six-step process overview is provided regarding how additive manufacturing integrates into foundry operations.

3D Printing and Casting Process of Manifolds

Overview of the 3D Printing Process

• The design phase precedes printing, where a negative of the manifold design is created to mold the shape rather than print metal directly.

• A sand core sample is printed in layers using sand mixed with glue, which hardens under light, forming a mold for casting.

• The granularity of the printed material is fine, with male thickness at two microns, ensuring precision in the casting process.

Importance of Sand Removal

• Effective removal of sand from molds is crucial to prevent contamination in hydraulic systems; any residue can lead to operational failures.

• Vibration techniques are employed to extract sand from molds, utilizing sophisticated frequency methods for thorough cleaning before oil introduction.

Machining and Final Product Optimization

• Although 3D printing creates the initial form, machining is necessary for creating precise surfaces and threads that cannot be cast accurately.

• The final manifold showcases optimized geometry and properties tailored for specific applications while maintaining structural integrity.

Quality Control Measures

• Various testing methods such as X-ray and alpha-stomy tests are used to check internal casting effects and ensure quality standards are met.

Benefits of Advanced Manufacturing Techniques

• Key advantages include:

• Individualized geometry allowing for unique designs tailored to specific installation spaces.

• Increased energy efficiency through optimized shapes reducing material waste.

• Function integration leading to fewer components needed in assembly.

• Weight reduction contributing to overall system efficiency without compromising strength.

• Elimination of auxiliary goals or scoops typically required in traditional manufacturing processes.

Design Considerations for Manifold Geometry

• Innovative designs like shelf-shaped features allow better fitting into tight spaces while optimizing connection positions for easier maintenance and installation.

• Traditional manufacturing methods would require more time and cost due to milling processes; thus, advanced techniques provide significant economic benefits.

Surface Quality Concerns

• Questions arise regarding surface finish within internal cavities; rough surfaces may impact pressure dynamics but are addressed through careful design considerations.

Understanding the Impact of Cast Manifolds on Mobile Electronics

Overview of Cast Manifolds

• The speaker addresses common questions regarding cast manifolds, emphasizing their long-standing use in mobile electronics without obstruction from cast iron surfaces.

Surface Finish and Internal Geometry

• Discussion on the importance of surface finish for internal cavities, particularly for seating surfaces that require machining to ensure smoothness for O-rings or R-rings.

• Highlights the significance of both external and internal geometries in manifold design, suggesting a shift from traditional block shapes to more complex forms.

Functional Integration Benefits

• Introduction to functional integration, showcasing how compact manifold designs can consolidate multiple components into a single unit, reducing installation space and effort.

• Emphasizes reduced piping and hoses as a result of integrated designs, leading to easier installation processes.

Energy Efficiency Considerations

• Discusses energy efficiency related to oil flow within manifolds; highlights how traditional drilling methods create flow resistance that increases energy requirements.

• Introduces innovative channel designs (banana-shaped or pipe-shaped), which minimize flow resistance and improve overall energy efficiency.

Reducing Delta P in Oil Flow

• Mentions potential reductions in delta P by up to 70% through improved oil redirection techniques within the manifold design.

Production Process Challenges

• Raises concerns about air ventilation during casting processes for complex shapes, questioning material integrity and strength throughout production.

Auxiliary Drilling Implications

• Notes that redirection of oil requires auxiliary drilling from outside the manifold, which adds volume but may complicate maintenance over time with plugs needing replacement.

Weight Reduction Strategies

• Discusses weight considerations in manifold design; emphasizes the need for lighter materials to reduce structural demands on machine frames.

Weight Savings and Installation Benefits

Potential Weight Savings

• The discussion highlights a significant weight difference between two machines, with potential savings of 30-40% in weight, which is crucial for energy efficiency during operation.

Added Value in Installation

• Emphasizes the added value of lighter machinery not only for performance but also for installation processes, suggesting that advancements elevate existing products to new standards.

Cybertrox Overview and Applications

Introduction to Cybertrox

• Introduces Cybertrox as the latest addition to the Power Unit family, described as "the Power Unit of the future," indicating its innovative features and capabilities.

Accessing Additional Information

• Provides a link to a previous webinar on Cybertrox available on YouTube, encouraging participants to explore more detailed information about its applications.

Manifold Design and Functionality

Main Manifold Features

• Describes the main manifold included in all Cytoboxes, detailing its role in filtering oil and redirecting it into hydraulic systems while highlighting benefits like weight savings and optimized workflow.

Production Process Insights

• Discusses the production process of manifolds using casting methods, emphasizing that they are manufactured nearby, ensuring quality control and efficiency.

Material Considerations

Material Options for Manufacturing

• Addresses inquiries about alternative materials such as stainless steel or aluminum; currently limited to cast iron due to manufacturing constraints related to casting processes.

Pressure Limitations

• Notes that pressure limitations exist when using cast iron materials, typically ranging from 315 to 350 bars depending on specific applications.

Machining Requirements and Surface Quality

Machining Needs

• Discusses necessary machining for surfaces requiring sealing threads; acknowledges time constraints but assures follow-up responses will be provided later regarding technical questions raised by participants.

Internal Surface Characteristics

• Mentions that internal surfaces produced through similar processes maintain standard qualities without negative effects from cast iron surfaces despite lacking specific roughness values at this moment.

Innovative Manifold Designs

Examples of Advanced Geometry

• Presents examples contrasting traditional cubic shapes with modern designs featuring kidney-shaped channels made possible through advanced manufacturing techniques like 3D printing.

Advantages of New Designs

• Highlights advantages such as reduced complexity in design leading to improved energy efficiency due to better oil flow management within these newly designed manifolds.

Energy Efficiency Improvements

Enhanced Flow Dynamics

• Explains how innovative designs allow for better oil flow dynamics compared to conventional methods; emphasizes increased energy efficiency through optimized internal geometries.

Conclusion on Design Impact

• Concludes with insights into how these advancements can significantly enhance overall system performance by reducing auxiliary holes and improving fluid dynamics within hydraulic systems.

Future Applications and Information Sharing

Evolution of Technology

• The discussion highlights the impressive evolution of technology, suggesting that it is a significant advancement in the field.

• Emphasis on the current state of technology being live and ready for broader applications, indicating readiness for implementation.

Customer Journey and Information Access

• Importance of providing customers with information to start their journey; online resources are particularly emphasized due to COVID-19.

• Mention of webinars as a resource for information, alongside traditional sales teams who are equipped to handle inquiries and project requests.

Technical Specifications

• Discussion on pressure handling capabilities, noting that applications can manage pressures between 315 to 350 bars depending on specific use cases.

• Wall thickness considerations are addressed, highlighting variability based on pressure and diameter while stressing long-term design experience in optimizing systems.

Engagement and Feedback

• Acknowledgment of numerous questions from participants, showcasing engagement levels during the webinar.

• Announcement of upcoming webinars related to new topics (Odin and Lume Proportional Wells), encouraging feedback from attendees for continuous improvement.