What are the techniques for repairing old parts in a car?

Generally, the principle of "repair-based, supplemented by replacement", the repair of auto parts is commonly used in machining, pressure processing, welding, spraying, etc

Electroplating, gluing and other processes to restore their performance. There are many repair methods for general parts, except for machining (eg.

In addition to the most basic methods of caring, mirroring, planing, grinding, milling, etc., there are also widely used auxiliary repair processes, namely "welding, repairing, spraying, plating, riveting, inlaying, matching, modification, calibration, expansion, contraction, sticking" and so on.

Welding: that is, welding repair. It is the most widely used machining method in parts repair. It is to rely on the heat of the arc or gas flame to melt the metal of the welding wire and the parts, and use the cohesion of the molecules to connect the metal parts to achieve the purpose of filling the wear of the parts and restoring their completeness.

Supplement: If a crack occurs in a more human casting, an unloading hole can be drilled at the end of the crack to prevent the crack from continuing to develop, and the reinforcing plate should be used to reinforce and repair it to make it closed. If the damaged part is drilled and tapped, add nails to repair larger cracks and holes.

Spray: Spray the molten metal on the surface of the rough part that has been prepared using high-velocity airflow. The spraying method of melting metal with an arc is called electric spraying

The spraying method of melting metal with acetylene flame is called gas spraying, and the spraying method of melting metal with high-frequency induction current is called high-frequency electric spraying. The spraying method has simple equipment, easy to use, low production cost, and is widely used.

Plating: Some important auto parts with high processing accuracy, such as gears, journals, etc., are worn out beyond the limit in use, and electroplating repair is the most suitable in this case. If the surface of the part is plated with two layers of inscription or other metal, it can be used after restoring its original size.

Riveting: After the relevant parts are loosened, they are repaired by riveting process to restore their normal working condition.

Inlay: In the worn parts of the parts (such as journals, inner holes, etc.) by static fit, a new metal sleeve is inserted to restore it to its original size and continue to be used.

Matching: When the parts are partially worn or a certain aspect, within the scope of the structure, the methods such as turning and turning (such as flywheel tooth rings) can be adopted to turn the parts or rotate them at a certain angle, so that the intact side can replace the damaged part and continue to work.

Change: After the parts are worn, through filing, V-cutting, sawing, hinging, scraping and other processes, they can restore the normal geometric shape or fitting properties through the change of size.

Calibration: Using the plasticity characteristics of metal materials, using the action of external forces, such as pressure correction, percussion correction and flame correction, the parts are eliminated from deformation and the correct geometry is restored.

Expansion: Many hollow parts with simple shapes, as long as the plasticity of the material is good, can be repaired by cold expansion method.

Shrinkage: Use the pressure tender method to shrink or deform the plastic parts. If the extrusion process is used, the inner diameter of the hollow part is reduced to obtain the required size.

Drying: The use of chemical materials, that is, the use of synthetic polymer compounds of the glue drying process, so that it and the surface of the parts to form a chemical bond combination, produce a greater cohesion to repair the parts.

There should be a lot of technology for repairing old parts of the car, and you can learn about some of their related technologies through some platforms.

Hello. In recent years, the development of science and technology has provided a variety of alternative repair methods for the repair of automobile parts, which are classified according to the defect characteristics of the repair parts, each with a certain characteristics and scope of application.

1. The repair methods of worn parts can basically be divided into two categories:

1) Machining of worn retarded parts to restore the correct geometry and mating characteristics and obtain new geometric dimensions.

2) The use of surfacing welding, spraying, electroplating and electroless plating and other methods to increase the wear parts of the parts or the use of expansion (reduction) upsetting and other pressure processing methods to increase (or reduce the size of the wear parts), and then mechanical processing, to restore its nominal size, geometry and the specified surface roughness.

2. The repair of deformed parts can be done by pressure correction method and flame correction method.

Cracks, breakage and other damage defects on the parts can be welded, brazing, fitter machining method or bonding repair method.

Car repair technology is a comprehensive technology, which mainly includes the following aspects:

1.Engine technology: The engine is the heart of the caravan and the source of power for the car. Engine technology includes engine fault diagnosis, disassembly and maintenance, debugging and optimization.

2.Chassis technology: The chassis is an important part of the car, including the braking system, steering system, suspension system, tires, etc. Chassis technology includes the inspection, repair, replacement and upgrade of these systems.

3.Air conditioning technology: Modern cars are generally equipped with air conditioning systems, which include diagnosing faults, maintaining and replacing parts.

4.Electrical technology: Modern automobiles use a large number of electronic components, and electrical technology includes the inspection, repair and replacement of automotive circuits and electronic modules.

5.Body repair technology: After a car accident, it is necessary to repair the body damage, which requires professional body repair technology.

6.Paint technology: Paint technology includes spraying and repairing the paint on the surface of the car, such as sanding, coloring, and baking the paint.

7.Upgrade and modification technology: Many car owners like to upgrade and modify their cars, which requires a high level of upgrade and modification technology.

In conclusion, car restoration techniques are very broad, and it requires comprehensive knowledge and skills, as well as an attitude of continuous learning and innovation.

1. Basic tools for body repair: workbench and tool box, marking tools, measuring tools, shaping tools, cutting tools, fixtures, etc.

2.Body repair equipment: According to the process flow of automobile collision repair, the current equipment and tools can be roughly divided into body girder correction system, body shaping equipment, welding equipment, body measurement system and related accessories.

1.The body girder correction system is mainly divided into L-type simple frame body corrector, ground frame correction equipment (commonly known as ground gossip system), frame type correction equipment (special equipment) and platform type correction equipment (general equipment).

2.Body shaping equipment mainly includes heating tools, sheet metal repair machines (meson machines), grinding and cutting tools and welding equipment (CO2 and inert gas shielded welding and spot welding machines, etc.).

3.There are two main types of measurement systems: electronic measurement systems and mechanical measurement systems, which measure three-dimensional data of the car body.

4.In order to cooperate with the body girder correction system to install and position the body, it is also necessary to match some accessories for fixing the body with the straightening table, as well as some special fixtures specially for specific models.

It depends on what kind of restoration project it is, and the tools are different depending on the project.

Hello, generally look at the damaged parts to see if there are parts that can be replaced, can be repaired, and if not, they can be replaced directly.

Among the new technologies of automobile maintenance, what are the old parts repair technologies? 04-17 14:59:47

Hello, car repair is a general term for car maintenance and repair. Generally, it is divided into: vehicle overhaul, assembly overhaul, automobile minor repair, and parts maintenance.

1) Automobile overhaul: repair by repairing or replacing any parts of the car to restore the intact technical condition of the car.

2) Assembly overhaul: It is a repair to restore the intact technical condition, working capacity and life of an assembly of the car. The main assemblies include engine, frame, body, transmission, rear axle, front axle, etc.

3) Automobile minor repair: It is an operational repair that uses the method of repairing and replacing individual parts to ensure or restore the working ability of the vehicle.

4) Parts maintenance: It is to repair the parts that cannot be used due to wear, deformation, damage, etc.

The first one is the old tires and underwires. If it's just that the tires are rotten or the tires are aging, and the steel rim is useless, there is no problem, but some slight bumps can also be reused, the old steel rim can also be sold for dozens of dollars, and the tire steel rim can also be repaired in the middle, and the steel rim after re-repair is no different from the new one, which does not affect the normal use. However, if the steel rim is deformed or the edges are knocked off, it can only be sold as scrap metal.

Generally, the old tires that are replaced can be discounted to the shops that change the tires. The second is the three-way catalytic converter for automobiles. The three-way catalytic converter is the highest among the old parts that can often be replaced, a broken three-way catalytic converter can be sold for 100-300 yuan, and a new three-way catalytic converter needs several thousand yuan, which is relatively high.

After the three-way catalytic converter is damaged, the car will have a weak acceleration phenomenon, generally because the three-way catalytic converter is blocked or poisoned, if it is blocked, it can be repaired, and if it is poisoned, it can only be replaced. Because the three-way catalytic converter contains precious metals, it can be reused, so it is higher. The third is the car battery.

The proportion of car battery replacement is higher, almost every 3-6 years, and an old battery is about 50-100 if it is sold, which is relatively not low. After all, it is also an extra economic income. The fourth is the generator, the air conditioning compressor.

If the generator or air conditioning compressor is only broken with a small part, it also needs to go to the repair shop or 4S shop to replace the assembly, and it cannot be repaired. The old parts that have been replaced can be taken to the market**, and the market will collect them, because the old generator or air conditioning compressor can be used again after repair. Of course, if the internal damage is too large, such as burning, there is no value.

First, the continuous increase in the number of cars in China has led to the rapid development of the auto repair industry. With the increasing popularity of automobiles, automobiles have changed from luxury goods to daily necessities, and the automobile repair and maintenance field has been further expanded. Clause.

Second, the sharp increase in the auto repair market, there is also an extreme shortage of auto repair talents. According to authoritative data, the current shortage of professional auto repair talents in China has reached 1.8 million. Major automotive companies are extremely thirsty for auto repair talents.

Third, senior auto repair talents are highly sought after by enterprises and become high-paying blue-collar workers in the new era. Due to the uneven quality of professional auto repair talents engaged in automobile maintenance services in the market, senior auto repair talents with a certain theoretical foundation and excellent technology are even more difficult to find. Therefore, the auto repair talents who have received systematic professional education have greater core competitiveness in the market.

From the above aspects, it can be seen that learning auto repair technology is promising.

For maintenance, it is okay to change the oil once every 5000 kilometers. Some vehicles will have a hint.

1.Engine oil: changing the oil is the most common item in maintenance, the oil is to lubricate the engine, cooling, shock absorption and cushioning and reduce wear, etc., the oil has a life cycle, so it should be replaced regularly, different types of oil replacement cycles are not the same, and the current oil types are divided into three types:

Fully synthetic, semi-synthetic and mineral oils. Fully synthetic motor oils have better high and low temperature types, and ** are also the highest of the three. The replacement cycle is generally 10,000-12,000 kilometers.

The replacement interval of semi-synthetic engine oil is 8,000-10,000 km. Mineral oil is generally replaced at 5,000 km.

2.Three filters: Three filters refer to the oil filter, air filter, and air conditioning filter.

The function of the oil filter is to remove various impurities in the oil and ensure the normal lubrication system, so the oil filter should be replaced together with the oil when changing the oil. The air filter element is used to filter the air to ensure the cleanliness of the intake air, and the replacement cycle is 20,000 kilometers or 2 years. The air conditioning filter is to prevent dust and odor from entering the car, and the replacement cycle is 20,000 kilometers or 2 years.

3.Spark plug: The function of the spark plug is to ignite the combustible gas mixture in the cylinder, once the working time is too long, it will make the engine run unevenly and produce shaking, and even form a lack of cylinder, which can not ignite, and at the same time will make the engine more fuel-efficient, so the role of the spark plug is very important.

The replacement cycle of iridium spark plug is 80,000-100,000 km, the replacement cycle of platinum spark plug is 50,000-60,000 km, and the replacement cycle of nickel-gold spark plug is 20,000-30,000 km.