Pittler Skiving Advances Gear Manufacturing with New Technology

Imagine a production facility where valuable floor space is at a premium, yet a single machine can process multiple gear types without frequent tool changes - even capable of machining internal gears. This is no longer a distant dream but the reality being achieved through PITTLER SKIVING gear cutting technology, which is quietly transforming the landscape of gear manufacturing with its unique advantages.

The skiving technique is intrinsically linked to the Pittler name. As early as the beginning of the 20th century, Julius Wilhelm of Pittler Company invented this technology and obtained the patent. However, constrained by the electronic gear coupling technology of that era, skiving technology failed to demonstrate significant economic benefits. Only in recent years, with rapid advancements in electronic gear coupling technology, has skiving truly come into its own as an economically efficient gear processing solution.

The core principle of skiving technology lies in maintaining a specific shaft angle between the high-speed rotating workpiece and tool to achieve cutting. This ingeniously designed angle creates directional differences between the circumferential speed vectors of the workpiece and tool, with the vector difference representing the actual cutting speed. This distinctive motion mechanism endows skiving technology with highly efficient cutting capabilities.

In traditional skiving kinematics, tools are typically positioned relative to the workpiece along the Y-axis direction. To prevent collisions between workpiece and tool sides, specially designed conical tools with structural clearance angles were required. However, this approach presented inherent limitations: restricted tool profile accuracy and difficulties in repeated regrinding, consequently constraining both tool lifespan and processing precision.

To overcome these limitations, DVS Group conducted extensive research and innovation in skiving technology, culminating in the development of PITTLER SKIVING. The fundamental improvement involves introducing additional tool displacement along the X-axis - an eccentric positioning that tilts the tool away from the workpiece, creating a kinematic free angle.

This eccentric positioning design represents a revolutionary change, eliminating the need for conical tools and enabling the use of cylindrical tools instead. The advantages of cylindrical tools are immediately apparent:

• Enhanced profile accuracy: Cylindrical tools offer superior manufacturing precision, enabling higher gear profile accuracy.
• Extended service life: The capacity for multiple regrinding operations significantly prolongs tool lifespan.
• Reduced tooling costs: Simplified manufacturing processes combined with extended tool life substantially lower tool expenses.

The application of PITTLER SKIVING technology not only improves gear processing precision and efficiency but also dramatically reduces production costs, delivering substantial economic benefits to gear manufacturers.

Eccentric Positioning Mechanism: Traditional skiving maintains a fixed tilt angle between tool and workpiece axes necessary for cutting motion, which simultaneously creates collision risks requiring conical tools for clearance. PITTLER SKIVING introduces additional axis tilting through eccentric positioning, creating greater clearance that accommodates cylindrical tools.

Cylindrical Tool Superiority: Compared to conical alternatives, cylindrical tools demonstrate:

• Enhanced rigidity for greater cutting force capacity
• Simplified manufacturing processes reducing costs
• Superior regrinding performance for prolonged usability

Kinematic Free Angle Significance: This innovation allows dynamic collision avoidance during cutting operations, improving safety while enabling more complex tool geometries for precision machining.

Software Control Importance: Advanced control systems precisely manage tool trajectories, cutting parameters, and eccentricity for optimal results, with real-time monitoring ensuring process stability.

In gear manufacturing, hobbing represents a common alternative. The comparative advantages include:

Application Scenarios:

• PITTLER SKIVING excels with low-runout gears, multiple gear processing on single workpieces, and internal gear machining
• Hobbing remains preferable for mass production of standard gears

Tooling Considerations: Hobbing typically requires double-supported tools without automatic changing capability, making PITTLER SKIVING advantageous for:

• Complete processing in single setups
• Small-to-medium batch production where machine reconfiguration and automatic tool changers offer flexibility

Beyond standard involute gears, PITTLER SKIVING technology accommodates diverse gear profiles, promising broad applications across automotive, aerospace, robotics, and other precision manufacturing sectors.

As manufacturing demands for gear precision, efficiency, and cost-effectiveness continue escalating, PITTLER SKIVING technology is positioned to play an increasingly vital role in shaping the future of gear production methodologies.