When developing its high-performance motorcycles, particularly the championship-winning 820RR-RS racing bike, Zhang Xue Motorcycles employed multi-axis CNC machining technology in multiple core components to achieve optimal performance. These components typically feature complex geometries, stringent precision requirements, or are fabricated from difficult-to-machine materials.
The following are key components in Zhang Xue’s locomotive that explicitly or indirectly employ multi-axis machining technology:
Core components of the Motorcycle engine
The engine is the “heart” of a motorcycle, and the precision and performance of its internal components directly determine the vehicle’s overall performance. Multi-axis machining technology plays a crucial role in this process.
- Engine cylinder head
Processing challenges: The cylinder head contains complex intake and exhaust passages, the combustion chamber, and cooling water channels, all of which represent typical complex curved structures. To achieve optimal intake/exhaust efficiency and combustion efficiency, these curved surfaces require extremely high precision.
Multi-axis machining application: The manufacturing process explicitly utilized specialized equipment such as a four-axis rotary table to perform multi-dimensional, synchronous precision machining on the complex surfaces of the cylinder head, ensuring both lightweight construction and high accuracy.
- Engine cylinder block
Processing challenges: The flatness requirement for the cylinder block is exceptionally stringent, tightened from the industry standard of 0.05 mm to 0.02 mm. Such high precision is fundamental to ensuring the engine’s high compression ratio and reliability.
Multi-axis machining application: To meet this “thread” grade tolerance, the machining equipment must be upgraded to a five-axis coordinated machine tool, combined with online laser compensation technology, to achieve stable mass production.
- Crankshaft and Connecting Rod
Processing challenges: The crankshaft and connecting rod structures are complex and must maintain stability under high-speed operation (exceeding 16,000 revolutions per minute) and high explosive pressure. Notably, titanium alloy connecting rods are employed, which are inherently difficult-to-machine materials.
Multi-axis machining applications: The processing of difficult-to-machine materials such as titanium alloys, while ensuring the strength and precision of complex irregular structures, relies heavily on multi-axis machining technology. Through multi-axis coordination, tool attitudes can be optimized to achieve efficient and precise cutting, ensuring part reliability under extreme operating conditions.
Motorcycle stand and body structural components
To achieve the perfect balance between lightweight and high rigidity, the frame and body panels employ intricate designs that require multi-axis machining for fabrication.
- Motorcycle stand
Key manufacturing challenge: The frame is constructed using aviation-grade aluminum to achieve optimal lightweight performance. As the “skeleton” of the entire vehicle, the frame features a complex structural design that must balance rigidity and weight.
Multi-axis machining applications: The efficient and high-precision machining of complex structures in lightweight materials such as aluminum alloys represents a typical use case for multi-axis machining, ensuring the precise realization of frame design specifications.
- Motorcycle Covers
Material: Composite materials such as carbon fiber.
Processing challenges: Carbon fiber covers are not only lightweight but also feature complex aerodynamic shapes.
Multi-axis machining applications: When manufacturing molds for carbon fiber components, multi-axis CNC machines are required to precisely machine the complex surfaces of the molds, ensuring the dimensional accuracy and surface quality of the final products.
In summary, the success of Zhang Xue’s motorcycles is the result of collaborative innovation across the entire high-end manufacturing supply chain. From the precision components inside the engine to the lightweight external structures, multi-axis CNC machining technology serves as the key means for achieving high precision and runs throughout the entire manufacturing process of its high-performance motorcycles.