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Working principle of slow wire processing

 Slow wire walking, also called low-speed wire walking, is a kind of CNC machining machine tool that uses continuously moving fine metal wire as an electrode to pulse spark discharge on the workpiece to generate a high temperature of over 6000 degrees, ablate metal and cut into a workpiece. The principle of wire processing is the phenomenon that there is a gap between the wire electrode and the workpiece, and the metal is removed by continuous discharge. Since the slow-moving wire cutting machine adopts the method of wire electrode continuous feeding, that is, the wire electrode is processed during the movement, so even if the wire electrode is worn out, it can be continuously supplemented, so it can improve the machining accuracy of the parts and slow the wire. The surface roughness of the workpiece processed by the cutting machine can usually reach Ra=0.8μm and above, and the roundness error, linear error and dimensional error of the slow-moving wire cutting machine are much better t

How Do Cnc Swiss Machines Work

How Do Cnc Swiss Machines Work Save 0 What Is Swiss Machine –The full name of the walking CNC lathe, it can also be called the spindle box mobile CNC automatic lathe, the economical turning and milling compound machine tool or the slitting lathe. It belongs to precision machining equipment, which can complete compound  machining such as turning, milling, drilling, boring, tapping, and engraving at one time. It is mainly used for batch  machining of precision hardware and special-shaped shafts. This machine tool first originated in Germany and Switzerland. In the early stage, it was mainly used for precision machining of military equipment. With the continuous development and expansion of industrialization, due to the urgent needs of the market, it was gradually applied to the  machining of civilian products; the development of similar machine tools in Japan and South Korea Earlier than China, it was mainly used in the military industry in the early days. After the war, it was gradually

Spring Design Attention And Roll Forming Method

Spring Design Attention And Roll Forming Method The coiling characteristics and methods of springs are divided into cold coiling method and hot coiling method. Cold winding method: When the diameter of the spring wire is less than 8mm, the cold winding method is adopted. High-quality carbon spring steel wire is usually first cold drawn and then heat treated. After winding, it is generally not quenched, but only tempered at low temperature to eliminate the internal stress during winding. Hot-rolling method: Springs with larger diameter (>8mm) spring wire should use hot-rolling method. Hot rolled springs must be quenched and tempered at medium temperature. The Design Process Of Various Springs ·          Installation space: When designing a  compression spring , it is necessary to have a clear understanding of the space required for the installation of the spring, in order to effectively grasp the basic manufacturing conditions of the compression spring, including the outer diam

Explore the lubrication methods of electric spindle bearings

Effectively controlling the temperature rise of the high-speed rotating electric spindle bearing is a very important indicator of the electric spindle, and the temperature rise of the spindle is closely related to the bearing. The method to reduce bearing temperature rise is:
(1) Reduce the dynamic friction of the bearing;
(2) Adjust and improve the heat dissipation environment of the bearing.
Commonly used electric spindle lubrication has the following methods:<br />
1. Grease lubrication<br /> &nbsp;&nbsp;&nbsp;&nbsp; Under normal circumstances, the heat per unit time of the bearing increases as the temperature rises, and the viscosity of the lubricating oil will decrease accordingly. In order to avoid overheating and injury of the bearing, it is necessary to fully add lubricating oil. However, the increase in oil volume also increases the resistance of stirring and increases the dynamic friction loss, thereby increasing the resistance of the electric spindle. If a small amount of grease is used for lubrication, not only will it not achieve the purpose of low friction, it will also not bring out the heat of the bearing. The high-speed rotation of the high-speed electric spindle accelerates the deterioration of the grease and reduces the service life of the grease. <br />

2. Oil mist lubrication The temperature of the bearing increases the service life of the electric spindle. Another advantage is that due to the oil mist lubrication of the electric spindle, the inside of the bearing seat has a certain air pressure, which avoids the damage of the electric spindle caused by the abrasive particles entering the shaft shell of the electric spindle. However, oil mist lubrication has problems of environmental pollution and inaccurate oil control. <br />

3. Oil-air lubrication<br /> Oil-air lubrication has the following characteristics:<br />
(1) A very small amount of lubricating oil can be continuously and stably supplied to the bearing;<br />
(2) Less environmental pollution. After placing the oil-air-lubricated electric spindle in a propylene box for about 2 hours, the air pollution level in the measuring box is about 0.03 mg/m. Pollution is less than that of oil mist lubrication. The reason is that oil-air lubrication has less oil than oil mist lubrication, and the lubricating oil and compressed air flow into the bearing in two phases. <br /> (3) It is difficult for dust or moisture and cutting fluid to enter the electric spindle bearing. The compressed air keeps the inside of the electric spindle bearing positive pressure. <br />

Link to this article:Explore the lubrication methods of electric spindle bearings

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