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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

Establish a mathematical model of the automobile air-conditioning system

The heat exchanger model library uses this model library, and the user enters the parameters (including the use code of the heat exchanger, the type of the heat exchanger, the structural parameters of the heat exchanger, the material parameters, and the evaporator under the prompts of the software interface of the heat exchanger. After the inlet air volume or the front wind speed of the condenser, the dry and wet bulb temperature of the inlet air, the type of refrigerant, the flow rate of the refrigerant, and the temperature and pressure of the refrigerant at the inlet), calculate the heat exchanger in a given working condition Performance (including the heat transfer of the condenser, the cooling capacity of the evaporator, the pressure drop on the air side and the inside of the tube, and the temperature and pressure of the refrigerant at the outlet); the model library can also calculate the heat exchanger structure separately Changes in parameters, changes in the wind speed or volume of the air at the inlet of the heat exchanger, and changes in the performance of the heat exchanger when the temperature of the air at the inlet of the heat exchanger changes are reflected in the form of a curve. The model library can be used to calculate the relationship curve between the opening and flow of various types of H-type expansion valves and externally balanced expansion valves, providing a reference for users to select expansion valves reasonably.

Liquid storage tank model library Calling this model library can calculate the volume and flow resistance of various types of liquid storage tanks. Provide a reference basis for users to reasonably select liquid storage tanks. The air conditioning system model library reasonably selects the automobile air conditioning refrigeration system based on the heat load value calculated by the heat load model library, the allowable installation space location of the car, and the existing component products, and then establishes the mathematical model of the automobile air conditioning system. The following functions can be realized by using this model library: simulation simulation calculation of simulation bench test; calculation of multiple operation modes can be carried out. It can calculate the known refrigerant charge or the required refrigeration capacity; calculation of multiple connection methods; for a given automobile air-conditioning refrigeration system, the compressor speed, the condenser inlet air temperature or the oncoming Under the conditions of wind speed, variable evaporator inlet air temperature or air volume, the performance of the automobile air-conditioning refrigeration system (such as cooling capacity, power consumption, coefficient of performance, evaporator outlet air temperature, compression ratio, compressor suction temperature and The influence law of pressure, exhaust temperature and pressure) is expressed in the form of curves, so as to provide a reference basis for predicting the matching rationality and working conditions of the automobile air conditioning system. For 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.

Link to this article:Establish a mathematical model of the automobile air-conditioning system

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