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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

The main shortcomings of the four-roll calendering method in the production of inner lining

At the same time, the airtight layer film to be used on the guiding device is guided and enters the centering compound platform through the film conveyor belt. On the centering compound platform, the airtight layer film and the transition layer film are combined to form an inner lining. . The composite inner lining layer enters the winding device through the film conveyor belt for winding, and the hard polyester film is put on the winding. Similarly, the winding temperature is lower than 40 ℃, and the inner lining film is rolled on an I-shaped reel. At this point, the inner liner is produced and enters the forming process for use. Main technical parameters The main technical parameters of the four-roll calendering method for the production of inner lining are as follows; calender power 4×40kW; single-layer film thickness 0.4~3.0mm; film width composite centering error ≤ 2mm; film winding uniformity error. Main advantages and disadvantages The advantages of the four-roll calendering method to produce the lining layer are mainly manifested in the following aspects: (1) faster production speed; (2) better surface quality of the produced film; (3) lower temperature of the rubber compound; ( 4) Lower equipment investment.

The four-roll calendering method mainly has the following shortcomings in the production of inner lining: (1) Since the rubber material fed into the roller gap of the calender is a reciprocating rubber strip, the rubber material has a certain amount of accumulation on the roller gap. The accumulated rubber is rolled into the nip for several times before being rolled, so it is easy to entrap air and make the rolled film contain air bubbles. (2) Because it is easy to form bubbles, the calendering method is only suitable for calendering to produce films that are not too thick. Generally, the thickness of the calendered film is not more than 3mm. For thick products (such as transition layer film), only the pasting method can be used. Production. (3) Since the roller of the four-roll calender is of no belt type and adopts the layered method, the cross-sectional shape of the inner lining produced by the calendering method can only approximately meet the structural design requirements. (4) The thickness error of the film is affected by the amount of accumulated glue. Therefore, the feeding should be carried out continuously and evenly to keep the amount of accumulated glue constant.

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