What is wire cutting fluid? Can it really improve the problem of cutting surface roughness? Beginners must know!

What is cutting fluid?
Wire cutting fluid is divided into water-based and oil-based. At present, water-based environmentally friendly fluids are mostly used.

For wire cutting workpieces with relatively high processing accuracy and finish requirements, customers are generally advised to use medium-speed wire cutting fluid. Medium-speed wire cutting fluid is used for EDM wire cutting of various metal materials. Medium-speed wire cutting fluid must have certain insulation properties. Working fluids with good insulation properties are conducive to generating pulsed spark discharges, avoiding arc discharges, and reducing energy loss. Therefore, they generally have excellent anti-rust, lubrication, cooling, cleaning and arc extinguishing functions.

When wire cutting is performed during operation, sometimes the surface finish of the wire cutting will deteriorate. What causes this?

First find the reasons from the following 7 places:

1) The cutting fluid (water-based) has been used for too long and the concentration is not appropriate----re-adjust the water-based ratio and replace the cutting fluid if necessary.

2) Wear of the main wheel and bearing----Observe whether the molybdenum wire is shaking during operation, and listen to whether there are abnormal sounds in the bearings of various parts, so as to judge whether the bearings or guide wheels need to be replaced. Please replace them if necessary.

3) Incorrect cutting process----Check whether the processing parameters are appropriate and whether the wrong parameters are selected.

4) Workpiece deformation---Try to choose materials with good conductivity and less non-conductive impurities, do a good job of heat treatment; pre-process the wire hole; pre-cut to release stress; optimize the cutting path.

5) Molybdenum wire loss is large----Check the molybdenum wire diameter and replace the new molybdenum wire in time, and check whether the molybdenum wire has wire phenomenon.

6) Material structure problem----Use different materials for different processing effects. Test whether the material is highly magnetic. The impurities cut by high-magnetic materials adhere to the molybdenum wire and are not easy to wash away, resulting in poor surface finish.

7) The machine tool is in poor condition----Check whether the lubrication of each guide wheel, wire barrel, conductive block, and each lead screw guide rail is normal.

The above 7 points are actually the daily inspection and maintenance required for wire cutting. Regardless of whether the finish is good or not, daily inspection is required. Even fast wire with low finish requirements should also do the above 7 points.

So what are the core factors affecting the roughness of wire cutting machine tools? How to improve the finish of wire cutting? Especially for the smoothness of medium-speed wire cutting, medium-speed wire cutting has increasingly replaced some slow-speed wire cutting machines, and the requirements for smoothness are getting higher and higher.

The core is wire cutting technology

To solve the problem of surface finish of wire cutting, it is recommended to make an effort to select when purchasing wire cutting!

Whether the finish of a good medium-speed wire cutting machine is good or not depends on the high-frequency power supply, which is irreversible in the later stage. If you want to improve it, replacing the electric cabinet is also a considerable expense. A good wire cutting high frequency should have a good finish, not rely on cutting fluid, and have a low failure rate, stable and durable.

Advantages of Zhikai's patented unobstructed CNC power supply

1. Zhikai CNC exclusively developed the imitation slow wire stripping power supply technology-Zhikai unobstructed electrolytic high-frequency power supply (national copyright number: 2018SR156739), Zhikai electrolytic high frequency, inhibit electrolytic corrosion, and improve surface quality. When special materials are processed without electrolysis, the surface is not easy to oxidize and discolor. For example, when processing special alloys, primary color cutting is achieved, effectively improving the surface finish of the cutting.

The picture below is the WeChat feedback from Zhikai office staff after they helped the customer to test cut the sample. From the screenshot, we can see that the customer tested the smoothness to be Ra0.779, height 100 high stainless steel, and the customer took it to Guangdong Wusha to measure the roughness. The customer was very satisfied with the smoothness, and said that his company's slow wire cutting could not achieve this effect. I wonder what brand of slow wire cutting the customer used?

2. High stability

Zhikai has an unobstructed and electrolytic high-frequency power supply, and no wire cutting resistor is used in the circuit, so the power of the whole machine is about 1.2kw. Of course, the original intention of the development was not to save electricity, but because in the processing state, a fan must be installed to dissipate the heat of the resistor box. Because of the existence of the fan, over time, a large amount of oil and dirt is brought into the wire cutting electrical appliances, resulting in an increase in the failure rate. The unobstructed high-frequency circuit developed by Zhikai has no fan in the whole machine, which increases the service life of electronic components and is beneficial to the stability of the finish of the wire cutting machine.

Zhikai's medium-speed wire cutting machine tools all adopt the self-developed non-obstruction and non-electrolytic high-frequency technology, with high finish and good stability. The machine tool is mainly used for efficient metal cutting processing in the fields of automobile manufacturing, aerospace, energy equipment, etc. The advantages of the machine tool such as high performance, high precision and low energy consumption make it an ideal choice for all kinds of manufacturing companies. We always adhere to the business philosophy of customer-centricity and quality as life. We believe that Zhikai ZKA400 servo-integrated medium-speed wire cutting machine tool will be your ideal choice. If you have any questions about our products or need customized services, please feel free to contact us. We look forward to cooperating with you! 18012669688.