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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

Elimination of Gear Backlash in CNC Machining Feed System

Elimination of Gear Backlash in CNC Machining Feed System   The transmission gear in the feed system of the CNC machining machine tool must eliminate the transmission gap between the meshing gears as much as possible, otherwise the motion will lag behind the command signal after each reversal of the feed system, which will affect the machining accuracy (accuracy) ). There are the following two common methods for CNC machining machine tools to eliminate the transmission gear gap.   1. Rigidity adjustment method   The rigid adjustment method is an adjustment method that cannot be automatically compensated for the tooth side clearance after adjustment. Therefore, the pitch tolerance and tooth thickness of the gear must be strictly controlled, otherwise the flexibility of the transmission will be affected. This adjustment method has a relatively simple structure and a better transmission rigidity.   (1) Eccentric shaft adjustment method   As shown in Figure 610, the gear 1 is mounted on th

Hot summer car maintenance strategy

Nature: Fire
In addition to the hot weather, the aging of vehicle internal parts is also an important cause of spontaneous combustion of vehicles. Therefore, vehicle owners should be diligent in daily inspection and maintenance of vehicles.
Engine gasoline filter failure, wiring failure, power line aging, or long-distance overloading of the car causes the engine components to keep running and the temperature rises, which may cause the car to spontaneously ignite.
Fire extinguisher essential
The fire extinguisher is a necessary device for the car. However, many car owners do not understand the correct use of fire extinguishers, or never check whether the fire extinguishers are working properly, so that in the event of an emergency, they cannot carry out self-rescue. Therefore, vehicle owners should learn the correct use of fire extinguishers at ordinary times; if the vehicle is equipped with a dry powder fire extinguisher, it is best to go to the local fire fighting equipment store to check once a year, mainly to check whether the dry powder powder is agglomerated, and whether the pressure of the built-in nitrogen bottle that provides jet power drops, etc. .
No dangerous items left in the car
Lighters, perfumes, air fresheners, etc. in daily life are also dangerous goods that constitute car fires. If these goods are placed in the car, the vehicle may explode after exposure to the sun. Therefore, check the compartment before locking the car, and do not leave these dangerous goods. In addition, ordinary vehicles should try not to carry dangerous goods such as gasoline and diesel.
Don’t be nervous after danger
If the vehicle does spontaneously ignite, don’t be nervous. Most of the spontaneous combustion will have precursors: such as local smoke, burnt smell, etc. If the owner finds that the vehicle is abnormal, he should stop quickly and do not rush to rescue the property in the vehicle to avoid burns and scalds.
Many vehicles can extinguish spontaneous combustion in the early stage, but they often cause unnecessary losses due to the nervousness of the owners. After a fire occurs, you should report to the police as soon as possible under the premise of ensuring your own safety, and avoid panic because you try to make use of on-board fire extinguishers or other fire extinguishing equipment for initial remedial action.
*Good for spontaneous combustion insurance
For spontaneous combustion of vehicles, insurance companies generally have spontaneous combustion insurance, that is, additional spontaneous combustion loss insurance for vehicles, which stipulates that the insured motor vehicle is in spontaneous combustion if the fire is caused by the failure of its own electrical appliances, wiring, and fuel supply system during use. , If the driver is covered by spontaneous combustion insurance, the insurance company can pay for it.
Invasion of Water: Rain
In the scorching summer, heavy rains come at any time. The safety of driving on rainy days requires special attention, but the summary is nothing more than driving, wading, line of sight, tires and other key points.
take the lead
When driving on rainy days, try to use the second or third gear, and the speed should not exceed 40 kilometers per hour. When driving on rainy days, you need to pay attention to pedestrians on the road. The best way to avoid skidding on slippery roads is to drive slowly.
Avoid low tire pressure
Rainy driving will put higher requirements on the tires, and the depth of the tire pattern in the rainy season can be guaranteed to be more than 4mm. Because the tread depth is too low, it is easy to form a water film between the tread and the water surface, causing the car to run off, flick the tail and increase the braking distance.
Pass through the stagnant area at low speed and high speed
When passing through the stagnant area, you should use to block the vehicle and hold the throttle. You must not stop, change gears or make a sharp turn when passing through. Because once the car is turned off, the exhaust pipe will immediately flow back into the water, causing damage to the exhaust system. At the same time, the vehicle cannot drive too fast when wading. In addition, generally do not pass through the water depth below the center of the wheel or the exhaust pipe *best.
Solve the problem of unclear vision in time while driving
When driving on a rainy day, using the headlights will form a dazzling light curtain. Use fog lights instead. If fog is produced on the front glass and blur the line of sight, you need to turn on the cooling switch of the air conditioner and blow the glass with cold air. This can quickly make the line of sight clear. When the windshield appears foggy, you need to turn on the rear windshield heater to eliminate the fog as soon as possible. If the wiper does not sweep the water thoroughly and the rain sticks to the car glass, you can put the car wax map on the car window to make the glass surface wax Membrane, sight range.

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