In the field of electronic manufacturing, the production accuracy of printed circuit boards (PCBS) is directly related to the performance and quality of electronic products. As the core equipment in the drilling process, the operational stability and processing accuracy of PCB drilling equipment are of vital importance. Among them, a factor that is often overlooked but extremely crucial - the granite base - is quietly determining whether the potential of the equipment can be maximized.
The characteristic advantages of granite bases
Outstanding stability, resistant to vibration interference
During the PCB drilling process, the drill bit rotates at high speed to cut the board, generating continuous and complex vibrations. The granite base, with its dense and uniform structure formed by geological processes over hundreds of millions of years, has an extremely strong seismic performance. High-quality granite represented by "Jinan Green" is hard in texture and can effectively absorb and disperse the vibration energy generated by the operation of equipment, ensuring the stability of drilling equipment during operation. Compared with other material bases, granite can significantly reduce the impact of vibration on the positioning accuracy of the drill bit, making the position accuracy of the drilled holes higher and the deviation controlled within a very small range, meeting the high-precision drilling requirements of micro-holes and small hole diameters for high-density PCB boards.
High hardness and wear resistance ensure long-term accuracy
Frequent drilling operations pose a great challenge to the wear resistance of the base surface. The Mohs hardness of granite can reach 6 to 7, far exceeding that of common metals and most engineering plastics. This high hardness characteristic enables the granite base to maintain good flatness and smoothness on its surface even when it is subjected to the impact force and friction of the drill bit for a long time. Even after a large number of drilling tasks, the degree of wear is negligible, thus ensuring the long-term stable operation of the drilling equipment and the consistent drilling accuracy. This is of great significance to large-scale PCB manufacturing enterprises. It can reduce the equipment downtime and maintenance time caused by base wear, improve production efficiency and lower the overall production cost.
Low thermal expansion and contraction, adaptable to temperature changes
In the PCB manufacturing workshop, the ambient temperature fluctuates due to factors such as seasons and equipment heat dissipation. The base made of common materials has obvious thermal expansion and contraction phenomena, which will cause changes in the relative positions of equipment components and thereby affect the drilling accuracy. Granite has an extremely low coefficient of thermal expansion. For instance, the linear expansion coefficient of common granite is approximately 4.6×10⁻⁶/℃. When the temperature changes, the size of the granite base remains almost constant, providing a stable and reliable support foundation for the drilling equipment. Whether in the hot summer or the cold winter, the equipment can maintain a high-precision drilling state, ensuring the consistency of drilling quality for different batches of PCB products.
Adapt the mechanism of PCB drilling equipment
Precise installation and positioning lay the foundation for accuracy
During the processing of the granite base, through advanced diamond cutting and grinding techniques, extremely high flatness and dimensional accuracy can be achieved. For instance, the flatness tolerance of high-precision granite bases within a range of 1m×1m can be controlled to no more than 4μm. This enables the drilling equipment to be installed quickly and accurately based on the precise plane and positioning structure of the base, with minimal installation deviations of each component. Precise installation and positioning provide a guarantee for the accurate movement of the drill bit during the subsequent operation of the equipment, improving the drilling accuracy from the source and effectively reducing problems such as hole position deviation and inconsistent hole diameters caused by improper equipment installation.
Enhance structural rigidity and improve operational stability
When PCB drilling equipment is in operation, in addition to its own vibration, it may also be affected by external transportation, uneven workshop floors and other factors. The granite base has a high density and strong rigidity. After being closely combined with the main structure of the equipment, it can significantly enhance the structural rigidity of the entire equipment. When the equipment is subjected to external force impact or vibration, the granite base can evenly disperse the impact force with its own strong rigidity, preventing the key components of the equipment from displacing or deforming due to uneven force, and ensuring the stable operation of the equipment under complex working conditions. A stable operating state helps to extend the service life of the equipment and provides a stable and reliable operating environment for high-quality drilling at the same time.
Actual production application effect
PCB production for electronic consumer products
In the manufacturing of PCBS for consumer electronic products such as smart phones and tablet computers, the requirement for drilling accuracy is extremely high. After a well-known electronic manufacturing enterprise introduced PCB drilling equipment equipped with granite bases, the product yield rate increased from the original 80% to over 90%. The problems such as poor line connection and short circuit caused by insufficient drilling accuracy have been significantly reduced. Meanwhile, due to the granite base reducing the frequency of equipment maintenance, the monthly production capacity of this enterprise has increased by 20%, effectively lowering the production cost per unit product and winning a price and quality advantage in the fierce market competition.
Manufacturing of industrial control board PCBS
The working environment of industrial control boards is complex, and the reliability requirements for PCBS are strict. A company specializing in the production of industrial control boards has seen a significant increase in the pass rate of its PCB boards in harsh environmental tests such as high temperature and high humidity after adopting drilling equipment with granite bases. The enhanced operational stability of the equipment makes the drilling quality more reliable, providing a solid guarantee for the long-term stable operation of the industrial control board. With high-quality products, the enterprise has successfully opened up more high-end industrial customer markets, and its business scale has been continuously expanding.
Granite bases, with their excellent stability, high hardness and wear resistance, as well as low thermal expansion and contraction, play an irreplaceable role in enhancing the potential of PCB drilling equipment. From precise installation and positioning to enhancing the structural rigidity of the equipment, and to its outstanding performance in various actual production scenarios, all have fully demonstrated its significant value in improving the drilling accuracy and production efficiency of PCBS. On the path of pursuing higher precision and efficiency in PCB manufacturing, the granite base is undoubtedly the key to unlocking the maximum potential of PCB drilling equipment, and it deserves the high attention and wide application of a large number of electronic manufacturing enterprises.
Post time: Jun-10-2025