Aluminum alloy has good surface gloss and good corrosion resistance in the atmosphere and fresh water, so it has a wide range of uses in the manufacture of civil utensils. Pure aluminum has good corrosion resistance in oxidizing acid media such as nitric acid and acetic acid, so aluminum castings also have certain uses in the chemical industry.
Cast aluminum alloy has some advantages that other castings cannot match, such as beautiful appearance, light weight, corrosion resistance, etc. Therefore, aluminum alloy castings are widely used in the aviation industry, power machinery and transportation machinery manufacturing., making it widely favored by users, especially since the lightweight of automobiles, cast Casting Auto Mould aluminum alloy castings have been widely used in the automotive industry Applications. Therefore, the use of aluminum alloy castings under the same load conditions can reduce the weight of the structure.. The density of cast aluminum alloy is lower than that of cast iron and cast steel, but its specific strength is higher.
They are used in heat exchange devices used in chemical production, and parts that require good thermal conductivity on power machinery, such as the cylinder heads and pistons of internal combustion engines, are also suitable for aluminum alloys. manufacture. Pure aluminum and aluminum alloys have good thermal conductivity Such as commonly used door handles, door locks, radiators, water pipes, iron pots, gas stoves, irons, etc.
Therefore, the machine tool industry that provides processing and manufacturing equipment also requires product variety, which has become an important indicator of the overall strength of a machine tool industry. Castings account for a large proportion of mechanical products., to avoid or reduce defects such as component segregation, deformation and cracking of copper castings. For example, for tractors, the weight of castings accounts for about 50-70% of the total weight of the whole machine, 40-70% for agricultural machinery, and 70-90% for machine tools and internal combustion engines.
When designing, not only must the geometry and size of the machine tool casting be determined according to the working conditions and the performance of the metal material, but also the rationality of the design must be considered from the perspective of the casting alloy and casting process characteristics, that is, the obvious size effect and solidification, Shrinkage, stress, etc
On the other hand, they may cause fire accidents. 'Longevity' tactic 7: Avoid pressure If the tire casing is stored for a long time and is not turned over in time, it will deform due to extrusion; the paper filter element of the air filter and the fuel filter cannot reliably filter if it is squeezed; Rubber oil seals, triangle tape, oil pipes, etc. cannot be squeezed either.'Longevity' tactic*: Avoid heat auto parts-engine piston temperature is too high, it is easy to cause overheating and melting and hold the cylinder; rubber seals, triangle tape, tires, etc.
The fifth 'longevity' trick: avoid washing For the paper air filter element of the engine, no oil can be used for cleaning; for leather parts, it is not suitable to use oil for cleaning. 'Longevity' tactic three: avoid dirty auto parts-fuel filter, oil filter, air filter, hydraulic oil filter and various filters and other parts if they are too dirty, it will lead to poor filtering effect., if they are close to the fire source, will be prone to deterioration or damage. overheat, easy to premature aging, performance degradation, and shorten the service life; starter, generator The coils of electrical equipment such as, regulators are overheated, and they are easily burned and scrapped. are stained with oil, which will threaten driving safety.; engine connecting rod bolts, flywheel bolts, drive shaft bolts installed cotter pins, locking screws, safety plates or If the spring washer and other Aluminum alloy machining products anti-loosening devices are missing, they may cause serious failures during use; if the oil nozzle used to lubricate the gear in the engine timing gear chamber is missing, it will cause serious oil leakage.
The longevity of 'longevity': avoiding near fire Rubber products such as tires, triangle tape, cylinder liner water blocking ring, rubber oil seal, etc. 'Longevity' tactic two: avoiding opposition Auto Parts-The engine cylinder head gasket cannot be installed reversely, otherwise it will cause premature ablation and damage to the cylinder head gasket; the engine fan blades cannot be reversed when installing; for directional pattern tires and chevron tires, install The rear ground impression should point the tip of the herringbone towards the back. 'Longevity' tactic four: avoid deficiencies Engine valve lock plates should be installed in pairs, if missing or missing, it will cause the valve to lose control and damage the piston, etc.
Eighth of 'Longevity': Avoid repetition Some parts should be used once, but individual drivers or repairers reuse them for saving or because they don't understand the 'taboo', which can easily lead to accidents. The sixth 'longevity' trick: avoiding oil The paper filter element of the engine dry air filter, if it is stained with oil, will easily draw the higher concentration of mixed gas into the cylinder, resulting in insufficient air volume, increased fuel consumption, and reduced engine power; if the triangle tape is stained with oil, It will accelerate its corrosion and aging; brake shoes, dry clutch friction linings, brake bands, etc. Tire rubber is very sensitive to oil corrosion, and contact with oil will soften or peel the rubber. Dirty parts such as water tank heat sink, air-cooled engine block and cylinder head heat sink, and cooler heat sink will cause poor heat dissipation and high temperature
On rainy days, cars often have various faults and dark diseases, which not only affect traffic, but also easily cause irreparable losses to driving safety, personnel and property. When there is sunshine, open the car doors to ventilate the car and keep the moisture away from the car. In the event of poor ignition and reduced engine performance, it is best to go to the repair shop for repair or replacement. At the same time, there are some dust invisible to the naked eye in the rainwater. It is very difficult to clean up after a long time.
Air conditioning interior: 'Respiratory tract' breeds mold after rain After a rainy day, the air conditioner and interior of the car will contain a lot of moisture, and mold will develop over time. Therefore, it is not only necessary to check the chassis frequently, but also to seal the rust of the chassis with Shilidun chassis armor. After the sun is exposed, a large amount of oxides will be derived. Car lights: water mist causes 'cataracts' Rain is also easy to cause water in the headlights, too much water can damage the headlights and change the direction of the headlights. Car paint: acid rain erosion is easy to get If the car is not washed after the rainy day, the paint will be greatly damaged.. Rainwater contains acidic substances, which will corrode the bright film of nonferrous casting parts Manufactures the car paint.
Engine: Moisture prone to 'heart disease' For vehicles that have been drenched by rain for a long time, be careful of abnormal engines. 2. If you find that there is water mist in the lamp, it is recommended to turn on the headlights and high beam lights at the same time to let the water mist disappear. The biggest cause of this problem is the leakage of electricity due to the moisture of the ignition system. Especially after many days of heavy rain, it is a common phenomenon that the engine is not easy to start. At the same time, it is also very important to clean the items that can be cleaned in the interior such as foot pads, seat covers, etc.
The paint is damaged, and the metal is exposed on the surface of the chassis, oxidizing and rusting in direct contact with moisture. Here are some tips for car maintenance in the rainy season for everyone, which can not only protect your car, but also make your travel more assured. Chassis: often soaked in water to become Rainwater, moisture and salt in the accumulated water will erode the bottom of the vehicle and cause the chassis of the vehicle to age; in addition, when the road is built, there are more sands and stones, and if you drive in rainy weather, it will be hit by stones and cause the chassis to prevent rust.
On rainy days, cars often have various breakdowns and dark diseases, which not only affect traffic, but also easily cause irreparable losses to driving safety, personnel and property. If there is still water mist, then the adhesive glue of the lampshade may be loose, and it is better to repair it
The correct method should be to wipe with a damp cloth dipped in detergent to avoid accumulation of water. Because the chemical properties of different brands of coolant may be very different, and the preservatives used in different brands of coolant are also different, they cannot be mixed. Especially in cars with better airtightness. The engine with electronic control fuel injection device is different from the ordinary carburetor engine, and its fuel injection control device can automatically increase the fuel supply when the cold car starts.
Wash the car directly with water Many people wash their cars by themselves in summer. Step on the accelerator before starting ; It is the driving habit of many drivers and friends to step on the accelerator before starting, especially in cold winter, this starting method is not suitable for EFI cars. This approach is not only wrong, but also brings great hidden dangers to driving safety.
After the bolts and nuts are tightened, they have self-locking characteristics, and the friction force decreases after being coated with lubricating oil. After washing with water, it either deposits in the groove and is not easy to dry, or flows from the through hole to the gearbox and other parts to produce rust.
Mixing of different brands of coolants Everyone knows that the engine coolant should be added in time when the engine coolant is insufficient, but have you mixed coolants of different brands for use? If it is, then the editor, but you should let go of the coolant and add the same brand of coolant again. When the car is driving at high speed, the bolts and nuts are easy to loosen and become detached, which may cause driving accidents.
This is undesirable, let’s talk about 4 Nonferrous casting common mistakes.Many novice drivers often make many unobvious but dangerous mistakes when they do maintenance on their cars. But the inside of the car body should not be washed directly with water, because there is not nothing under the floor mats in the car, but there are many grooves and through holes.
They are often washed directly with water. So there is no need to step on the accelerator, let alone slam continuously before starting, otherwise the engine will start badly. Lubricate wheel bolts and nuts In order to prevent the bolts and nuts on the wheels from rusting, some car owners ingeniously coated the bolts and nuts with lubricant
It must be more than 13V to be normal. This is also one of the ways to extend the service life of your car. Reminder: For the battery adding water, adding more and less is not enough, so when adding water, be sure to see the position of the upper and lower markings, and add water to the middle of the markings. If you don't have a three-purpose meter, you can use the visual method: after the engine starts, open the battery water cover to see if there are bubbles in each cell. Reminder: Special attention is that hydrogen gas will be generated during this inspection, so do not smoke during the inspection to avoid the danger of explosion and fire. Tips for car battery maintenance 2.
Therefore, the daily maintenance of the battery is also very important. Electric vehicle parts The maintenance tips for the three car batteries I have introduced above, I hope to provide you with a reference. Running on the road, it is inevitable that there will be some malfunctions. If it can't supply power normally, the engine and the circuit system on the car will follow. on the panel and the pile head (ie, the positive and negative poles) that can cause leakage.
Check whether the battery is charged properly. Among them, the battery is a great role for the car in the use of the car. If the charging voltage is too low, you need to ask a professional to overhaul the charging system. There are two methods. If you have a three-purpose electric meter, after starting the engine, measure the voltage of the two poles of the battery. If you can't get the distilled water at once, you can use filtered tap water as an emergency. In addition, you also need to wipe clean the dust, oil, white powder, etc.
It is of course a good thing to have a car of their own, but every day they love a car. The normal situation is that there are continuous bubbles coming out of the water, and the more fuel you get, the more bubbles will be. Do not add too much water, the standard is to add to the middle of the upper and lower markings. Open the battery water cover to see if the water level is in the normal position. Tips for car battery maintenance 3. Under normal circumstances, there will be upper and lower limit markings on the side of the battery for your reference. Because if you often scrub the battery like this, the pile head of the battery will not accumulate white acid powder, and its service life will be longer..
Now more and more people own a car as a means of transportation for their daily work or travel. If you find no bubbles, it is likely that the charging system is faulty. Wipe the exterior of the battery with a damp cloth. If you find that the water level is below the subscript line, you must add distilled water. Tips for car battery maintenance 1. Car owners should also remember to pay more attention to the maintenance of the car battery in daily maintenance, and don't ignore such an important component
