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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 bett...

Hydrostatic guideway of CNC machining lathe

The static pressure slide rail (TTW guide) of the CNC machining lathe transfers the oil with a certain pressure through the throttle to the oil cavity between the sliding surfaces of the slide rail (TTW guide) to form a pressure oil film to float the moving parts , Make the sliding rail (TTW guide) surface in a pure liquid friction state.   CNC machining General CNC machining usually refers to computer digital control precision machining, CNC machining lathe, CNC machining milling machine, CNC machining c17200   beryllium   copper   and milling machine, etc. The feed route of finishing is basically carried out along the part contour sequence. Therefore, the focus of determining the feed route is to determine the feed route of rough machining and idle stroke. In the numerical control processing, the control system issues instructions to make the tool perform various motions that meet the requirements, and the shape and size of the workpiece are expressed in the form o...

Hydrostatic guideway of CNC machining lathe

The static pressure slide rail (TTW guide) of the CNC machining lathe transfers the oil with a certain pressure through the throttle to the oil cavity between the sliding surfaces of the slide rail (TTW guide) to form a pressure oil film to float the moving parts , Make the sliding rail (TTW guide) surface in a pure liquid friction state.   CNC machining General CNC machining usually refers to computer digital control precision machining, CNC machining lathe, CNC machining milling machine, CNC machining c17200   beryllium   copper   and milling machine, etc. The feed route of finishing is basically carried out along the part contour sequence. Therefore, the focus of determining the feed route is to determine the feed route of rough machining and idle stroke. In the numerical control processing, the control system issues instructions to make the tool perform various motions that meet the requirements, and the shape and size of the workpiece are expressed in the form o...

To obtain a high viscosity index base oil product has a reasonable distribution in composition

Since the sulfur element is mainly concentrated in the macromolecular polycyclic polar aromatics, when the aromatics content in the base oil is very low, most of the sulfur has been removed, so the sulfur content generally meets the index requirements. The viscosity index is related to the saturated hydrocarbon content in the base oil, but it is not a simple linear relationship, but is determined by the total amount of saturated hydrocarbons and the ring distribution of paraffins, cycloalkanes and cycloalkanes that constitute saturated hydrocarbons. .

In order to obtain base oil products with high viscosity index, in addition to the higher saturated hydrocarbon content of the base oil, the saturated hydrocarbons should also have a reasonable distribution in the composition of paraffins and naphthenes, in order to achieve the goal. To further increase the saturated hydrocarbon content in the base oil, it can be achieved by increasing the reaction depth and reducing the aromatic content. However, from the reaction point of view, the saturated hydrocarbon conversion reaction has become the main reaction in the system. A large amount of saturated hydrocarbons are converted, which will greatly reduce the yield of lubricating oil fractions and even reduce the viscosity grade of the base oil product.

If the method of controlling the aromatics content in the hydrotreating feed is adopted, it can not only ensure the full conversion of aromatics, but also prevent the excessive cracking of saturated hydrocarbons, so that the goals of increasing the viscosity index and reducing the aromatics content can be guaranteed at the same time. Therefore, in the lubricating oil medium pressure hydrotreating process, in order to obtain high-yield and high-quality products, it is necessary not only to carefully select the appropriate pressure, temperature, catalyst and other conditions, but also to properly control the aromatic content in the feed to ensure high An important factor for quality and high yield base oil products.

The automotive parts and parts machining, PTJ Shop offers the highest degree of OEM service with a basis of 10+ years experience serving the automotive industry. Our automotive precision shop and experts deliver confidence. We have perfected the art of producing large component volumes with complete JIT reliability, backed by the quality and long-term reliability our customers expect.

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