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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

Talking about how spark plugs affect power performance

The oily deposits on the flower plugs are the entry of lubricating oil, and the chipping of the top of the insulator may be caused by low gasoline grade. When maintaining a car, pay more attention to the condition of the spark plug. A spark plug with excellent performance can improve the dynamic performance of the vehicle.

Under normal circumstances, the service life of spark plugs is 15,000 kilometers, and the service life of long-lasting spark plugs does not exceed 30,000 kilometers. However, many car owners’ spark plugs often suffer from problems of this kind and fail to reach their normal service life.

Actually, the working temperature of spark plugs is quite high. When the engine is running normally, the temperature of the spark plug insulator skirt is generally maintained between 500 and 600 degrees Celsius. The temperature is too high or too low to affect the spark plug badly. When the temperature of the spark plug is too low, the insulator on the spark plug is easy to deposit carbon, which will eventually cause leakage and cause misfire. If the working temperature of the spark plug is too high, it is easy to cause pre-ignition and engine knock. Common faults are classified into two types. One is that the spark plug is severely ablated, and the other is that the spark plug has deposits.

Spark plug ablation

When the car owner finds that there is a scar or damage on the top of the spark plug, the electrode is melted, or ablated, it all indicates that the spark plug has been destroyed, and the spark plug should be replaced at this time. During the replacement process, the owner can check the symptoms of spark plug ablation and the change of color.

Symptom 1: The electrode melts and the insulator is white

Diagnosis: This phenomenon indicates that the temperature in the combustion chamber is too high. This may be caused by excessive carbon deposits in the combustion chamber, resulting in too small valve clearance, which may further cause overheating of the exhaust valve or poor operation of the cooling device. When the spark plug is not tightened according to the specified torque, the electrode will melt and the insulator will appear white.

Symptom 2: The electrodes become round and the insulator is scarred

Diagnosis: This indicates that the engine burns prematurely, which may be caused by premature ignition time, low gasoline octane number, and high spark plug calorific value.

Symptom 3: The top of the insulator is broken

Diagnosis: Generally speaking, knocking combustion is the main cause of insulator rupture.Premature ignition time, low gasoline octane number, and high temperature in the combustion chamber may all cause the engine to knock and burn.

Symptom 4: Gray-black stripes on the top of the insulator

Diagnosis: The appearance of this streak indicates that the spark plug has leaked, and the owner needs to replace it with a new one unconditionally.

Deposits on the spark plug

Deposits sometimes stick to the tip of the spark plug insulator and the electrode. Car owners should not underestimate this deposit.

In severe cases, this situation may cause the engine to fail to work normally. After cleaning the spark plugs, the vehicle can run normally for a while, but a similar situation will occur again soon. In fact, the presence of deposits on spark plugs is only a superficial phenomenon, which may be a signal of problems with other mechanical parts of the vehicle.

Symptom 1: Oily deposits on the spark plug

Diagnosis: When oily deposits appear on the spark plug, it indicates that the lubricating oil has entered the combustion chamber.If there are only oily deposits on individual spark plugs, it may be caused by damage to the valve stem oil seal. However, if the spark plugs of each cylinder block have this kind of deposits, it means that the cylinders are leaking oil.Generally speaking, when the air filter and the ventilation device are blocked, the cylinder is prone to oil leakage.

Symptom 2: Black deposits on the spark plug

Diagnosis: There are black deposits on the spark plug electrode and inside, which usually indicates that the gas mixture in the cylinder is too thick.The owner can increase the engine speed for a few minutes to burn off the layer of black soot left on the electrode.

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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