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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

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 of numbers and lette

Classification of CNC Machining Occupation Levels

1. Blue-collar layer:   That is, CNC machining operation technicians, proficient in machining and CNC machining process knowledge, proficient in the operation and manual programming of CNC machine tools (attributes: automated machine tools), understand automatic programming and simple maintenance of CNC machine tools (attributes: automated machine tools), such There is a large market demand for personnel, and they are suitable for operating workers of CNC machine tools (attributes: automated machine tools) in the workshop, but due to their single knowledge, their wages will not be much higher.   2. Gray collar layer:   One, CNC machining programmer:   Master the knowledge of 5 Axis CNC machining Aluminum   technology and the operation of CNC machine tools (attributes: automated machine tools), be familiar with the design and manufacturing expertise of complex molds (title: mother of industry), and be proficient in 3D CAD/CAM software, such as UG, GOOGLE PRO/E, etc. ; Familiar with CNC

Emissions at idling speed are significantly higher than those of gasoline


Analysis of gasoline engine test results During the idle emission test, the operating conditions of the gasoline engine are basically the same as those of gasoline. It can be seen from the test data that the emissions at idling speed are significantly higher than those of gasoline. Compared with the curve gasoline in the gasoline without the device, for the Shanghai device, due to the special structure of the mixer, the airflow at the entrance of the carburetor is improved. The power has been significantly improved, but the fuel consumption has risen slightly. From the adjustment process of the test, it can also be known that through the adjustment of the fuel intake volume of different devices, as long as the air supply volume is sufficient, its power performance can reach the same level as that of gasoline, but the result will be Engine economy and emission performance are significantly worse. Economics It can be seen from the load characteristic curve of the engine that under the same conditions, the consumption and consumption rate are about 10% lower than that of gasoline. It can be seen from the load characteristics that the consumption and consumption under various operating conditions The consumption rate is lower than that of gasoline, which has more practical significance for the economy of dual-fuel vehicles.

Theoretically, the fuel consumption and the power of the engine should be complementary to each other, and the change in heat should be basically the same. The calorific value is approximately higher than that of gasoline and the air-fuel ratio value is generally higher than that of gasoline. Therefore, if the engine’s power performance is not considered to have a certain degree of decline, the economics of burning LPG are more obvious. When the throttle opening increases and the performance is better, the gas consumption quality is basically the same as that of gasoline, but sometimes larger, the intake air volume increases, and the combustion situation tends to be stable, although the volume will be slightly higher at lower speeds. It will drop and remain at a low level, but after reaching a high load, the emission performance will be increased from the load emission characteristic curve as the mixture becomes more enriched. However, the emission at low load is higher than that of gasoline, and the engine speed will always change the load difference. The emissions during combustion are not always about 50% higher than gasoline than gasoline under different working conditions. Regardless of the medium and high load, most of the fuel emissions are gasoline, which is very low at low load, and is higher than gasoline at high load and all. At this time, the amount will increase sharply due to the mixed load in this section.

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.

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