When purchasing a CNC vertical lathe, you can consider the following tips:

1. Define requirements: First of all, you must define your own processing needs and goals. Understand the size, shape, material and processing technology requirements of the parts to be processed, and determine the required processing capabilities and functional characteristics. This helps to screen out the CNC vertical lathe that suits your needs.
2. Brand and reputation: Choose a well-known brand CNC vertical lathe manufacturer with high reputation and reputation to ensure product quality and after-sales service. The reputation of the manufacturer can be evaluated by understanding user evaluation, brand history and market feedback.
3. Technical parameters and performance: Understand the technical parameters and performance indicators of CNC vertical lathe, such as maximum processing diameter, maximum processing length, spindle speed, feed speed, positioning accuracy, repeat positioning accuracy, etc. According to their own needs, select the appropriate parameters and performance indicators.
4. Rigidity and stability: The rigidity and stability of the CNC vertical lathe are crucial to the machining accuracy and quality. Pay attention to the basic structure, material, processing technology of the machine tool and the quality and design of the bed, guide rail, spindle and other components to ensure that the machine tool has sufficient rigidity and stability.
5. Operation interface and ease of use: The operation interface of the CNC vertical lathe should be intuitive and easy to understand and easy to operate. You can consider choosing a CNC system with a friendly user interface and rich functions and easy programming to improve operability and work efficiency.
6. After-sales service and maintenance support: ensure that the manufacturer provides comprehensive after-sales service and maintenance support. Understand the manufacturer's product warranty period, after-sales service scope, technical support and spare parts supply, etc.
7. Visiting display and trial: Before purchasing, try to visit the display manufacturer of CNC vertical lathe as much as possible to understand the actual operation and performance of the machine tool. If conditions permit, trial processing can be carried out to evaluate the processing effect and the stability of the machine tool.
8. Price and cost performance: After considering the above aspects, comprehensively compare the price and performance of CNC vertical lathes from different manufacturers and models, and choose products with higher cost performance.

To sum up, the purchase of CNC vertical lathe needs to comprehensively consider the processing requirements.