Key points for purchasing CNC lathes before purchase


Machine tool exhibitions are coming one after another. This article on the critical points for purchasing CNC lathes will be helpful to everyone!

Selection principles

1. Preliminary preparation

Determining the process requirements of typical parts, the batch of workpieces to be processed, and formulating the functions that CNC lathes should have are the prerequisites for making preliminary preparations and rationally selecting CNC lathes.

(1) Meeting the process requirements of typical parts

The process requirements of typical parts are mainly the structural dimensions, processing range, and accuracy requirements. According to the accuracy requirements, that is, the dimensional accuracy, positioning accuracy, and surface roughness requirements of the workpiece, the control accuracy of the CNC lathe is selected.

(2) Select according to reliability

Reliability is the guarantee for improving product quality and production efficiency. The reliability of CNC machine tools refers to the long-term stable operation of the machine tools without failure when performing their functions under specified conditions. That is, the average time between failures is long, and even if a failure occurs, it can be restored quickly and put back into use. Select machine tools with reasonable structure, excellent manufacturing, and mass production—generally, the more users, the higher the reliability of the CNC system.

cnc metal lathe turning

2. Purchase of machine tool accessories and tools

Remember to think about the parts and tools you’ll need when choosing a machine tool for production. It’s essential to make sure everything works well together.

3. Pay attention to the identity of the control system

Manufacturers generally choose products from the same manufacturer or at least select control systems from the same manufacturer, which brings great convenience to maintenance work. Teaching units, because students need to be knowledgeable, choose different systems, and equip various simulation software is a wise choice.

4. Choose according to the performance-price ratio

Ensure that functions and precision are not idle or wasted, and do not choose functions irrelevant to your needs.

5. Machine tool protection

When using certain types of machines, it’s essential to have safety features like protective covers and automatic chip removal. If you’re picking out CNC lathes and turning centers, it’s a good idea to think about these things carefully.

CNC lathe machine automatic lathe

Installation method

1. Lifting and transportation

The lifting and positioning of the machine tool should use the special lifting tools provided by the manufacturer, and other methods are not allowed. No special lifting tools are required. The operator should use steel wire ropes to lift and position the machine according to the specified parts in the manual.

2. Foundation and position

The machine tool should be installed on a solid foundation, away from the vibration source, to avoid sunlight and heat radiation, and to be placed in a dry place to prevent moisture and airflow. Anti-vibration trenches must be set around the foundation if a vibration source is near the machine tool.

3. Installation of the machine tool

The machine tool should be placed on a foundation and leveled in a free state before tightening the anchor bolts evenly. For ordinary machine tools, the level reading should not exceed 0.04/1000mm, and for high-precision machine tools, the level reading should not exceed 0.02/1000mm. When measuring the installation accuracy, it should be carried out at a constant temperature, and the measuring tool should be used after a period of constant temperature. Every effort should be made to avoid installation methods that cause forced deformation of the machine tool. Additionally, avoid removing parts of the machine tool casually during installation, as this may lead to significant new stress distribution and affect the accuracy of the machine tool.

Preparation before trial operation

After the machine tool passes the geometric accuracy inspection, the whole machine needs to be cleaned. Use cotton or silk cloth soaked in cleaning agents, and do not use cotton yarn or gauze. Clean off the anti-rust oil or anti-rust paint applied to the machine tool to protect the guide and processing surfaces when the machine tool leaves the factory. Clean the dust on the outer surface of the machine tool. Apply the lubricating oil specified for the machine tool to each sliding and working surface.

Carefully check whether all parts of the machine tool are filled with lubricating oil as required, whether the cooling box is filled with enough coolant, and whether the oil in the hydraulic station and automatic lubrication device of the machine tool reaches the position specified by the oil level gauge.

Check whether the switches and components in the electrical control box are regular and whether the plug-in integrated circuit boards are in place.
Power on the centralized lubrication device to fill the lubricating oil in each lubrication part and lubrication oil circuit. Make all preparations before the operation of each part of the machine tool.