Cutting Fluid Purification System

Overview

This CNC engraving and milling machine coolant purification system is a solid-liquid and oil-water separation purification system developed in response to the specific requirements of CNC machining processes for coolant. It is engineered to effectively remove contaminants such as metal particles, machine oil, and other impurities from the coolant, ensuring optimal machining performance and extended coolant life. The system fully meets the operational demands of CNC engraving and milling machines, offering reliable automatic or semi-automatic solid-liquid and oil-water separation functions to suit various production environments.

This CNC engraving and milling machine coolant treatment system is designed with a compact and space-saving structure, making it ideal for workshops where floor space is at a premium. It features a small footprint, low noise emission, stable and consistent performance, ease of installation, and user-friendly operation. Additionally, the system is equipped with liquid level feedback and alarm functions, providing operators with real-time status monitoring and ensuring safe and reliable operation throughout the filtration process.

By incorporating this purification system into your production line, your coolant can be used for a significantly longer period. Continuous purification not only extends the service life of the coolant but also maintains its performance consistency, reducing the frequency of coolant replacement and minimizing downtime associated with coolant management.

Technical Parameters

Structural Features and Working Principles

Structural Features

The CNC Engraving and Milling Machine Cutting Fluid Purification System is manufactured using advanced technology and adopts a mechatronic integrated structure, combining mechanical and electronic components for seamless operation. The system mainly consists of a hydrocyclone separator, a direct-return solid-liquid-oil-water separator, a Grundfos submersible pump, a cutting fluid tank assembly, instruments, valves, an electromagnetic flowmeter, a level gauge, piping, and a control cabinet. Each component is carefully selected and designed to work in harmony, ensuring reliable and efficient purification performance.

Working Principle

The supply pump delivers the contaminated cutting fluid to the hydrocyclone separator, which effectively removes metal chips and particles larger than 20μm through centrifugal force. The pre-separated cutting fluid then enters the direct-return solid-liquid-oil-water separator, where finer solid particles larger than 3μm are removed, along with most of the machine oil that may have mixed with the cutting fluid during the machining process. The cleaned cutting fluid flows into the cutting fluid tank and is then pumped by the clean liquid transfer pump back to the machine tool for reuse, ensuring a continuous supply of clean coolant to the machining process.

Electrical control unit sets automatic operation (the switch of manual start and automatic start-stop is only for the feeding pump, and manual start is allowed for the first running and emergency state).

There are two sets of straight type water-oil-solid separators, one is on-line, and other one is spare. After one separator’s pressure drop reaches the setting value, system switches to the other separator, and the indicator light of control cabinet is light. The filter media should be replaced in order to avoid failing to work during next switching time.

When cyclone is working, discharge must be happened regularly. The slurry discharge time should be set according to specific operating conditions (temporary manual discharge once every four hours).

Product Features

• Cost Savings: Significantly reduce bulk purchases of cutting fluid by extending its usable life; also extend tool life by maintaining consistent cooling and lubrication performance.
• Environmental Protection: Completely eliminate the problem of random discharge of cutting fluid waste, helping your facility comply with environmental regulations and reduce disposal costs.
• Improved Efficiency: Reduce downtime for production equipment by minimizing coolant-related interruptions and maintenance.
• Reduced Odor: Effectively solve the problem of cutting fluid discoloration and unpleasant odor, improving the working environment for operators.
• Improve Quality: Remove surface impurities and rust from machined parts, resulting in higher quality finished products and reduced rework.
• Purification Target: Achieve impurity separation precision down to 3μm, ensuring consistent coolant cleanliness and machining accuracy.

Component List and Names

CNC Engraving and Milling Machine Coolant Purification System

Application Fields

This purification system is suitable for the purification and separation of various cutting fluids and emulsions used in CNC lathes, CNC machining centers, the IT industry, and the automotive parts industry. It effectively removes contaminants and enables the recycling and reuse of cutting fluids, reducing operational costs and minimizing environmental impact. Whether used in high-volume production lines or smaller job shops, this system provides reliable and consistent performance.

Successful Applications

This CNC engraving and milling machine cutting fluid purification system has been specially developed to meet the stringent requirements of cutting fluids in CNC machining and milling processes. It has been successfully applied in the Dalian Machine Tool Plant project, with a cumulative total of 153 units delivered to date. The system has demonstrated excellent performance and reliability in this large-scale industrial application, earning the trust of end-users and contributing to significant improvements in coolant management and machining efficiency.