Before writing the article, just a friend bought a used car. After a while, he was very satisfied. However, suddenly one morning the car was picking up, and the train could not be started. It can be judged by a friend's description. It should be that the battery was dead. Then, after the replacement of the new battery, the car was all normal. The anxiety of my friend after buying a used car also eased a lot. Through the problem of car use by friends, we can see that many consumers who buy used cars can enjoy the high cost-performance of used cars. Once problems arise in the car, they may worry about the condition of used cars. In fact, the car has a lot of problems. The time is caused by some small details. We usually take care of it, so we can avoid many problems.
Car battery will also make you anchor
Whether it is a new car or a used car, the car battery is an easily overlooked issue. Many people will say that the battery life of the car is about two years, but from the perspective of the actual car, the car battery life is still very large, Life expectancy also varies from 1 to 5 years. This is mainly reflected in the habit of using cars. Therefore, it is advisable to use a voltmeter to test the life of a battery directly. This is the most accurate method. In addition, if the car starts for a long time, It may also indicate that the life of the battery is approaching. We should change it earlier. Otherwise, we can't tell you that the battery will suddenly strike.
Low oil change effect is obvious
For some models without maintenance records, we have to carry out related maintenance through the mileage of the car. Under normal circumstances, many people are accustomed to driving after a certain period of time, but from the actual point of view, after we buy used cars, it is best to directly replace the oil filter, the oil directly affects the state of the engine, these costs There are a few hundred, the cost is very low, but if the engine damage caused by not changing the oil is still more serious, some gain is not worth the candle. After replacing the oil filter, we can record the mileage, so that we can know the time of the next maintenance.
Transmission oil, brake oil, coolant can be checked and replaced according to instructions
Having finished the oil used car, let's look at the maintenance of other oils, if the car travels for tens of thousands of kilometers, then the transmission oil may need to be replaced, and this is also easily overlooked by many consumers, in general, The service life of the transmission oil is 40,000-80,000 kilometers. You need to pay attention to the fact that the automatic transmission oil can't be used wrongly or mixed. Otherwise it will cause parts and components to wear out.
Brake oil replacement cycle is changed every two years
Brake oil replacement cycle is generally replaced once every two years. The brake oil plays a role in the brake system of the vehicle. The brake oil itself has strong water absorption characteristics. It absorbs the moisture in the surrounding air, such as car wash and humid environment. And so on, the brake fluid has been used for a long time. Although there is not much impact on the surface, when the vehicle is in emergency braking or driving on a downhill road for a long time, the brake system will make the temperature of the brake oil rapid in the long-term or emergency braking process. Rising, directly causing the boiling point of the brake oil to fall, so that the braking force will drop, thereby affecting the performance of the brake.
Don't forget to check tire wear
Tire belongs to the consumables on the car. Wear and tear are inevitable. Unlike the oil maintenance cycle, the tire life of the car is mainly judged by the pattern of wear. Many people sell tires when the car is sold. Seriously, it will often be used, and some car dealers may use some old tires to replace the newer tires. Therefore, after buying a used car, the degree of tire wear must be carefully observed. If the wear exceeds the warning point, then Should try to replace new tires.
Stamping welding elbow, it is the same material with the tube sheet metal stamping die with a half block ring bend, and then the two half ring elbow for welding. Because of various pipe welding standards are different, usually by the group on the fixed semi-finished products of the factory, on-site construction according to the pipe weld level of welding, therefore, also known as the two halves of the welding elbow.Pipe installation of a commonly used in connection with the pipe, connecting the two nominal diameter of the same or different tubes, so that the pipe to make a certain angle turn.
Photo of our pressed bend:
Advantage
The stamping production efficiency is high, and the operation is convenient, easy to realize mechanization and automation, this is because the stamping die and stamping equipment is to rely on to complete the processing, ordinary press trips as per minute
Up to several tens of times, high-speed pressure to hundreds of times per minute or more, and every time the punch stroke may get a punch.
The stamping generally without cutting scrap generated, material consumption is less, and does not need to other heating equipment, so it is a kind of material saving, energy saving and processing, stamping parts of the cost is low.
The stamping process the size range is larger, more complex shape parts, such as a small clock stopwatch to auto longeron, covering parts, stamping cold material deformation hardening effect and punching strength and stiffness are higher.
The stamping die due to ensure the stamping part dimension and shape precision, and generally does not destroy the stamping parts of the surface quality, and die life is generally longer, so stamping quality stability and interchangeability good, has the characteristic of "identical".
The forming process of stamping elbow is complicated, and it needs to be welded according to different materials and uses, and is gradually formed under certain pressure. Stamping elbow molding need according to a certain process, strictly comply with the corresponding process, otherwise the production of stamping elbow will produce quality problems. According to the need, a circular ring shell can be cut into 90 6 degree elbow or 60 elbow or other specifications of the elbow, the process is applied to the
Any specification of large scale, with the diameter of the elbow and the diameter of the elbow is larger than that of the 1.5D, is an ideal method for the manufacture of large push bends.
This process molding method used in the production of different bends, in different areas to show good use value, so that the process in the production of different bends with good value reflected.
The advantages of the forming process of large stamping elbow are mainly shown in the following aspects:
Stamping elbow
One need not tube for raw materials, save the tube making equipment and the mold expense and can get arbitrary large diameter and wall thickness relatively thin push of elbow. The raw material of the punching elbow is special, and the raw material of the pipe blank is not needed to be added.
The stamping elbow blank is flat or developable surface, and thus a simple material, to ensure accuracy. Assembly welding is convenient, in the processing of easy control of raw materials, simple operation, no complicated process and welding and assembly is convenient.
Because of the above two reasons, can shorten the manufacturing cycle and the production cost is greatly reduced. Because no special equipment is needed, especially suitable for the field processing of large stamping elbow.
Material
Stamping elbow material is carbon steel, stainless steel, alloy steel and other materials. Carbon steel stamping elbow is cheap, the use of large. The alloy steel elbow is used in a special position on the.
Stainless steel stamping elbow is different from carbon steel elbow is the main material of different materials, the chemical composition will keep the elbow for a long time will not rust, is not easy to be corroded.
Stainless steel, stainless steel, corrosion resistance as the main characteristics, and the chromium content of at least 10.5%, the maximum carbon content of not more than 1.2% of the steel.
Carbon steel: A234 WPB ASTM/ASME, WPC
Alloy: A234 WP 1-WP 12-WP ASTM/ASME 11-WP 22-WP 5-WP 91-WP911 15Mo3, 15CrMoV, 35CrMoV
Stainless steel: A403 WP 304-304L-304H-304LN-304N ASTM/ASME
A403 WP 316-316L-316H-316LN-316N-316Ti ASTM/ASME
A403 WP 321-321H ASTM/ASME A403 WP 347-347H ASTM/ASME
Low temperature steel: A402 WPL3-WPL ASTM/ASME 6
High performance steel: A860 WPHY 42-46-52-60-65-70 ASTM/ASME
Cast steel, alloy steel, stainless steel, copper, Aluminum Alloy, plastics, PVC, argon Ge Lek, PPR, RFPP (reinforced polypropylene) etc..
Stamping elbow thickness standard
After the arrival of the scene of the stamping elbow, the thickness of the stamping elbow while improving the process, the average thickness of the thick wall of the stamping elbow to seriously exceed the standard, need to be calculated according to the actual measurement.
In the process of calculation conducted among, wall thickness of the general accounting process, general pipeline equipment, general interface thrust and the thrust is qualified of, of course, docking pipeline whether or not to set up a reasonable. For pipeline calculation of punching elbow should stress strengthen coefficient and flexible coefficient, of course, re accounting check when, the consistency of calculating stress strengthen coefficient of pipe wall thickness, this by the weight of the elbow were reduced wall thickness is stamping elbow along the center line were carried out straight, ensure stamping elbow straight weight and stamping elbow weight, stamping elbow for stamping elbow weight conversion of wall thickness.
Bend Tube Without Flanges,Bend Fitting With Flanges,Bend Pipe Without Flanges,Pressed Bend With Flanges
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