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 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 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
Tapping stainless steel is much more difficult than tapping regular steel. Often, due to the large torque, the screw tap is “bitten” into the screw hole, collapses or breaks, and the thread surface is not light. The groove has a groove, the size is out of tolerance, and the chaos and taps are badly worn. Therefore, corresponding technical measures must be taken to solve the problem of machining stainless steel threads.
1. When tapping a stainless steel thread.
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The phenomenon of “tooth enlargement” is more serious, and the tap is “easy to bite” into the hole, so the hole at the bottom of the thread must be properly enlarged. In general, the diameter of the bottom hole of a screw with a pitch less than 1 mm is equal to the nominal diameter minus the pitch. If the pitch is greater than 1 mm, the diameter of the hole at the bottom of the thread is equal to the nominal diameter minus 1.1 times the pitch.
2. Choosing the right tap and the right amount of cut is the key to tap quality.
The tap material should be selected from cobalt or aluminum carbide high speed steel. The main deviation angle is related to the pitch and the number of tap handles. Head cone Kr = 5-7, 2nd and 3rd cone Kr = 10-20. Calibration parts are typically 3-4 thread lengths and are 0.05-0.1 mm / 100 mm inverted cones. Generally, the direction of the tip holder is b = 8 to 15, which allows you to control the direction of the tip flow. For straight groove taps, the front edge of the tap can be ground into a spiral shape.The rake angle of the tap is generally gp = 15 ° to 20 ° and the back angle is 8 ° to 12 °.
3. You can tap stainless steel using tapless tap.
See Figure 7. The diameter of the bottom hole before extruding with a slotless tap is as follows. d0 = dw-(0.5-0.6) P Here, dw——work screw outer diameter, mm. P-pitch.
4. When tapping stainless steel, make sure you have enough cooling lubricant.
Sulfate oil is usually selected from + 15% to 20% CCl4. White lead oil + engine oil or other mineral oil; kerosene is diluted with chlorinated paraffins.
5. If the tap is damaged during tapping, the workpiece can be soaked in nitric acid solution to corrode, and the high speed steel wire cone can corrode quickly without discarding the workpiece.
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