In the field of smart phone manufacturing, the precision of glass cutting is of vital importance, and the granite base is becoming a key player in ensuring this precision. With its unique material properties and advanced technological application, it achieves a repeat positioning accuracy of ±0.5μm, bringing outstanding precision to the glass cutting of smart phones.
The inherent material advantages lay the foundation for precision
Granite has an extremely low coefficient of thermal expansion. This characteristic makes its size change very little when the temperature varies. During the process of cutting glass for smartphones, the operation of the equipment generates heat, and the ambient temperature may also fluctuate. The ordinary material base may deform due to thermal expansion and contraction, affecting the cutting accuracy. The granite base can effectively suppress this deformation and ensure the stability of the relative positions of each component of the cutting equipment. For instance, during several consecutive hours of high-intensity cutting operations, even if the internal temperature of the equipment rises by 10℃, the dimensional change of the granite base can be controlled at the nanometer level, without interfering with the cutting accuracy.
In addition, the internal structure of granite is dense and uniform, with high hardness, and it has excellent vibration resistance and wear resistance. The vibration generated during the cutting process and the friction of components such as guide rails during long-term use are both difficult to cause substantial damage to the granite base. It can absorb and buffer external vibrations, prevent the vibrations from being transmitted to the cutting tool, ensure a smooth cutting process, and create a stable working environment for achieving high-precision repeat positioning.
Supported by precise manufacturing processes
Through advanced processing techniques, the key indicators such as flatness and straightness of the granite base are controlled within an extremely small range. During the processing, high-precision grinding and polishing techniques are adopted to achieve an extremely high level of flatness on the base surface, with the flatness tolerance controllable within ±0.5μm. In this way, the guide rails of the cutting equipment installed on the base can maintain precise linear motion, providing a reliable foundation for the precise positioning of the cutting head.
Meanwhile, during the assembly process of the base and other components of the cutting equipment, high-precision positioning and fastening techniques were applied. Each connection point has been precisely calibrated to ensure the accurate relative positions between the components. Through precise bolt fastening and positioning pin installation, the cutting head, transmission mechanism, etc. are closely connected to the granite base, eliminating any possible gaps and looseness, thereby ensuring the accuracy during repeated positioning.
Advanced sensing and control systems work in coordination
To achieve a repeat positioning accuracy of ±0.5μm, the granite base is also deeply integrated with advanced sensing and control systems. High-precision position sensors such as grating rulers or magnetic grating rulers are installed on the cutting equipment. They monitor the position of the cutting head in real time and feed the data back to the control system. When the cutting head completes one cutting action and is ready for the next repeat positioning, the control system will compare the data fed back by the sensor with the preset target position.
Once a position deviation is detected, the control system will promptly issue an instruction to drive a high-precision servo motor to fine-tune the position of the cutting head. The entire process is completed in an extremely short time, enabling the cutting head to be quickly and accurately adjusted to the target position, achieving a repeat positioning accuracy of ±0.5μm. Moreover, this closed-loop control system can continuously learn and optimize. As the usage time increases, the accuracy and stability of repeat positioning are further improved.
In the field of glass cutting for smart phones, granite bases have successfully achieved a repeat positioning accuracy of ±0.5μm by virtue of their material advantages, precise manufacturing processes, and the synergistic effect of advanced sensing and control systems. This not only enhances the quality and efficiency of glass cutting for smart phones, but also provides strong support for the precision development of the entire smart phone manufacturing industry.
Post time: May-21-2025