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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

Introduction of KOVAR parts

KOVAR parts are commonly used as metal casing materials in the electronic packaging industry. Because they have a linear expansion coefficient close to that of molybdenum group glass, and can produce less sealing stress during the sealing (melting) process with molybdenum group glass, so To obtain good air-tightness, in order to make the metal tube and shell to achieve air-tight sealing, in the entire sealing process, the annealing process undoubtedly plays an important role as a link between the previous and the next. The internal stress generated during KOVAR  machining also prepares the material structure for the implementation of the subsequent process-the sealing process of the metal parts. The main purpose of annealing Kovar shell before sealing is to: (1) Eliminate machining stress. When Kovar undergoes plastic machining deformation during cold working, about 10% to 15% of the applied energy is converted into internal energy, which is commonly referred to as internal stress,

How to distinguish whether there is a phenomenon of “burning oil” in your car

We all know that “burning engine oil” is very harmful to vehicles. It will not only damage the oxygen sensor of the vehicle too quickly, but also lead to increased carbon deposits in the combustion chamber, unstable idle speed, weak acceleration, increased fuel consumption, and excessive exhaust emissions. In severe cases, insufficient lubrication of the engine may cause difficult-to-repair damage or even scrapping of the engine, resulting in a substantial increase in maintenance costs and even potential accidents. But for ordinary car owners, how to distinguish whether there is “burning oil” phenomenon in their car?
How to distinguish whether your car is “burning oil” can be distinguished from the following two phenomena: Phenomenon 1: The main manifestation of “burning oil” is that blue exhaust gas is discharged from the tail when driving, which means that too much oil has entered the combustion The chamber participates in combustion.
Phenomenon XNUMX: The oil dipstick detects excessive oil consumption.
Detection method: After the cold car starts in the early morning, check whether the exhaust pipe emits blue smoke; whether there is a lot of blue smoke from the exhaust pipe when the vehicle is driving or when the accelerator is stepped on the spot; in addition to the exhaust pipe, the oil port Blue smoke from time to time.
Expert analysis because the valve oil seals are aging and worn severely after long-term use, they can no longer achieve a good sealing effect. Therefore, some vehicles with a long service life or a large number of kilometers are more prone to “burning oil”. The reason for choosing to test in the early morning when the car is cold is that when the engine is not running for a long time, the oil will flow into the cylinder through the gap of the valve oil seal under the action of gravity. Once the engine is started, the oil in the cylinder will burn under the action of high temperature and high pressure, producing a lot of blue smoke. The detection method of slamming the accelerator is mainly to check whether there is a leaky seal between the piston ring and the cylinder wall of the engine. When the vehicle accelerates rapidly, the frequency of the up and down movement of the piston ring increases, and the lubricating oil remaining on the cylinder wall is easily carried into the combustion chamber by the piston ring, causing “oil burning”. If, under any circumstances, blue smoke comes out of the exhaust pipe, and blue smoke comes out of the oil port from time to time, it means that the engine has been worn out and the vehicle needs to be overhauled in time, otherwise it will cause serious accident hazards.
Maintenance tips Engine oil is very important to the protection of the engine. There are many reasons for the phenomenon of “burning oil”. Easily volatile oil, engine running-in, engine type, etc. may cause the engine to “burn oil”, but by strengthening the daily routine of the car Maintenance can reduce and avoid this risk. So, what maintenance tips should be paid attention to?
1. Develop good inspection habits. The oil should be checked regularly during routine and routine maintenance according to different usage conditions. If the oil level exceeds the lower limit, it should be added in time. For vehicles that have a long service life and mileage and are often used under severe conditions, the frequency of inspections should be increased accordingly. In this way, even if the vehicle is “burning oil”, it can achieve “early detection and early treatment” and reduce maintenance costs.
2. Choose better quality gasoline. After the additives in gasoline are oxidized, gelatinous substances are formed. After the fuel injectors enter the combustion chamber and burn, they will form carbon deposits on the intake valve, the top of the piston, the piston ring groove, the combustion chamber, the spark plug, etc., and aggravate these parts. The aging of the engine causes “burning oil”. Therefore, choosing better quality gasoline can reduce the phenomenon of “burning engine oil”.
3. Regularly maintain the vehicle. The maintenance period of the vehicle is formulated according to the normal driving conditions of the car. For vehicles with poor operating conditions, the maintenance period and the prescribed number of kilometers should be shortened according to the actual situation.
4. Choose better quality engine oil. The oil should choose well-known brands as much as possible. If conditions permit, the effect of using fully synthetic engine oil is better. High-quality engine oil not only has better cleaning performance, but also minimizes the wear of sludge and carbon-deposited parts, thereby reducing the occurrence of “oil burning”. At the same time, it also has better stability, making the oil in the engine Maintain proper viscosity level at high temperature and high speed to ensure effective sealing and reduce oil consumption.

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