1. Clarify machining requirements and precisely match equipment capabilities.
Part Types and Sizes
● Select a CNC machine tool with appropriate processing capabilities based on the shape (shafts, discs, housings, etc.) and size range of typical parts. For example, a horizontal lathe is suitable for processing long shafts, while a vertical lathe is more suitable for processing discs.
● Confirm whether the CNC machine tool's processing space (X/Y/Z axis travel) meets the workpiece's contour dimensions, and reserve space for fixture installation.
Accuracy and surface quality requirements
●CNC machine tool positioning accuracy and repeatability are key indicators. For general processing, equipment with a ±0.01mm rating can be selected, while high-precision processing (such as molds) requires a ±0.005mm or higher accuracy machine.
●Pay attention to the rigidity of the CNC machine tool. A high-rigidity structure reduces cutting vibration and improves surface finish (Ra ≤ 0.8μm).
Production Volume and Efficiency Requirements
● High-speed, high-rigidity CNC machine tools are required for large-volume production, such as those with spindle speeds ≥8000 rpm and rapid feeds ≥24 m/min.
● Small-batch, high-variety production can focus on multifunctional CNC machine tools, such as those with five-axis linkage and milling capabilities.
2. Evaluate equipment performance to ensure reliability and scalability.
Core Component Performance
● Spindle System: For CNC vertical lathes, preferably use an electric spindle or a direct-drive spindle. The power must match the material being cut (e.g., ≥15kW for cast iron machining).
● Turret and Tool Changer System: For CNC vertical lathes, select the number of turret stations (4, 8, etc.) based on the machining process. High-speed machining requires a tool change time of ≤2 seconds.
● Guides and Screws: CNC vertical lathes utilize ball guides and C3-grade ball screws to ensure smooth motion and repeatable positioning accuracy.
CNC System Selection
● For CNC vertical lathes, prioritize mainstream systems (such as FANUC, SIEMENS, and Huazhong CNC) for their strong compatibility and comprehensive technical support.
● For CNC vertical lathes, select a system version based on the complexity of the machining process: For rough machining, choose the basic version; for precision machining, choose the high-end version that supports five-axis linkage and RTCP.
Scalability and Compatibility
● Confirm whether the CNC machine supports additional features such as automatic chip removal and online measurement.
● Check the CNC machine's interface standards (such as RS232, USB, and network interfaces) to facilitate integration with automated production lines.
3. Investigate Brands and Suppliers to Reduce Long-Term Risk
Brand Reputation and Market Reputation
● Prefer CNC machine tools from reputable brands with at least 10 years of manufacturing experience; avoid small, workshop-style manufacturers.
● Consult user reviews in the same industry, focusing on equipment failure rates and after-sales service response speed.
Supplier Qualifications and Service Capabilities
● Investigate the supplier's certifications (such as ISO9001), the size of their technical team, and the distribution of their repair locations.
● Require suppliers to provide on-site trial machining services to verify the equipment's actual performance (e.g., cutting stability and noise level).
Accessories and Consumables Supply
● Confirm the supply cycle and price of key CNC lathe parts (e.g., spindle bearings, servo motors) to avoid excessive subsequent maintenance costs.
● Require suppliers to provide a list of standard parts and clearly specify the replacement cycle for consumable parts.
4. Refine Contract Terms to Protect Rights and Interests
Clear Equipment Parameters
●The contract must clearly specify the machine tool model, technical parameters, and configuration list (such as CNC system brand and turret type).
●Avoid vague terms such as "approximately" and "around" to ensure that parameters can be quantified and accepted.
After-Sales Service Terms
●Shandong Sunshine Machinery Co., Ltd. can provide on-site installation and commissioning training upon customer request.
●Suppliers are required to provide operational training (including programming and maintenance) and long-term technical support.
