Some questions about purchasing imported CNC machine tools

When selecting manufacturers and brands, it's crucial to consider their market share both domestically and internationally, as well as their recent sales performance, operational status, and financial health. Equally important is evaluating their service capabilities, especially remote support, to mitigate the risk of factory failure. For instance, a company once purchased a floor-standing CNC boring and milling machine from a Spanish firm in 1995, but before installation, the company went bankrupt. To reduce such risks, it's advisable to select more than three manufacturers and conduct thorough research on product performance, accuracy, key specifications, and pricing. In addition to traditional methods like user surveys, manufacturer exchanges, and site visits, it’s essential to attend authoritative international machine tool exhibitions held in China, such as CIMT. Leveraging domestic and foreign authorities, as well as neutral market intermediaries, can also provide valuable insights. Utilizing the internet for research and gathering information can further enhance decision-making. For open tenders, preparing a bid is critical. The main technical indicators should follow the principle of “fair, reasonable, and advanced.” Fairness ensures non-discriminatory selection, protecting the interests of the buyer. Rationality avoids over-indexing, which may lead to waste or discourage high-quality manufacturers. Overly advanced specifications can result in unnecessary costs and process inefficiencies. Meanwhile, ensuring that the equipment is not only technologically advanced but also of high quality and performance helps avoid low-price traps. Regarding pricing, with the industrialization of CNC machine tools in developed regions and global price reductions, the average cost of CNC equipment has dropped by about 50% over the past decade. However, prices for similar machines can vary significantly due to differences in production volume. A manufacturer producing only dozens of units annually may face higher component costs compared to one producing over a thousand units. Since parts account for roughly half the total price, this highlights the importance of balancing cost and quality. Researching fair international prices and focusing on the performance-to-price ratio can help avoid fraud and low-quality purchases. When it comes to positioning accuracy standards, four widely accepted international standards are ISO, JIS, ASME, and VDI. In addition, there are Chinese GB and British BS standards. Most of these use statistical methods for multiple-point measurements, resulting in consistent results. However, JIS only measures once, leading to lower accuracy values. For example, a machining center from HELLER shows different accuracy readings under JIS (±4 μm) and VDI (±14 μm). Similarly, BOSTON DIGITAL provides data comparing ISO and JIS standards, highlighting the importance of understanding how different standards affect reported accuracy. It's also important to verify the factory's precision reserve and not solely rely on measurement results. When choosing a CNC system, it's worth noting that the technology has evolved through two major stages and six generations. From NC systems using vacuum tubes and transistors to modern PC-based CNC systems, the latter offers greater flexibility, integration, and performance. These systems benefit from global component development, fast technological progress, and rich software resources. Features like touchscreens, voice input, networking, and mass storage are easily integrated into PC-based CNC systems. Many foreign manufacturers now implement networked production, and such advancements are increasingly being adopted globally. While FANUC and SIEMENS remain popular due to their market dominance, domestic PC-based systems are now on par with international counterparts in terms of development. Finally, when purchasing equipment, it's essential to consider long-term technological trends to ensure the selected machinery remains relevant for at least 10 years. For example, when Guangzhou Peugeot Automobile Company dissolved, China sought new partners. Japan’s Honda recognized the advantages of a flexible engine production line and quickly formed a joint venture. In contrast, another large auto joint venture faced challenges due to a rigid production line that couldn’t adapt to engine changes. This highlights the importance of selecting equipment with future-proof features and advanced capabilities.

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