What is the purpose of cold work in car repair? What is cold work for?

Mechanical: Hardware repair of the vehicle.

Circuit: Repair of automotive electrical systems.

Paint: Body paint and basic maintenance.

Cold work: The cold work hardening process is a processing method that uses the cold work hardening of metal materials to improve the strength, hardness and wear resistance of metal materials.

Examples of the use of this process are: sandblasting (to improve surface hardness, wear resistance), cold rolling (to improve the strength of plate profiles), cold tun (to improve the strength of bolts), and so on.

To put it simply: machine repair is mainly to disassemble and assemble mechanical equipment, circuit is to disassemble and assemble electrical equipment, paint is surface finishing, and sand and sand scraping brushes.

The cold work is an iron sheet shape, knocking and beating.

Paint work on the cultural requirements are not high, cold work to understand some geometric knowledge, machine repair has certain requirements for mechanical assistance in the handwork, circuit is to understand the drawings on the basis of improvement.

Mechanics are repairs such as engines (which are relatively dirty).

Circuit maintenance on the car can be understood as long as it is wired, it belongs to the scope of the circuit (relatively clean).

Painting is to spray paint and touch up the car.

Cold Work Personnel who perform cold and hot forming and riveting processes on sheet metal.

Personally, I think the circuit is easier to learn

Cold work is the surface of the car, and the body will not be dirty, I just do this prospect is good.

Manual tapping of thin iron (aluminum, copper) skin manufacturing or repair of various devices (including gas welding, tin welding) is mainly manual operation, and the labor intensity is large.

Cold work is also known as riveting, and some people also figuratively say that it is an "iron tailor". The job is to put all kinds of profiles. The plate is made into a product in accordance with the drawings and technical requirements.

This work culture course requires junior high school algebra and geometry to be learned well, basic courses such as mechanical drawing, materials and heat treatment must be emphasized, and then there are professional courses in cold work technology such as lofting and blanking. Calibration, molding, and assembly must be carefully learned.

The comprehensive process of processing metal plates, profiles and pipes into various metal structure products without changing their cross-sectional characteristics is called cold work process.

Workers who are engaged in the cold work process are called cold workers.

Cold work, also called riveter, is a general term for lofting, blanking, cutting, assembly, and so on.

At present, riveters mostly use software for lofting.

Steel structure CAD commonly used elbows, tees, large and small heads, round places, funnels and so on.

It's all easy in seconds.

Automatic lofting overall out of the blanking chart.

The area of the blanking diagram is automatically given synchronously.

Answer: Hello, I am happy to provide you with an answer, cold work is responsible for completing product processing and assembly according to the drawings of the staff, commonly known as riveters, practitioners need to have strong professional ability, be able to understand the drawings and complete the process in accordance with the relevant regulations. His work includes:

1. Conduct start-up inspection of relevant cold and hot processing machinery and equipment, and complete product processing in accordance with the technical process requirements of the drawings;

2. Complete the assembly process of the product in accordance with the technical requirements, and strictly control the machining allowance and shape and position tolerance of the assembled parts;

3. Use directional arrows and numbers to indicate the welding sequence and other relevant data during assembly.

4. After the product is welded and cooled, the product is corrected according to the actual needs to make the shape and technology of the product meet the relevant requirements.

5. Obey the command of the superior, fill in the product self-inspection report after completing the cold work assembly, and indicate the workpiece information and my own information.

When steel is processed below room temperature or recrystallization temperature, it can significantly improve strength and hardness, reduce plasticity and impact toughness, and is called cold work hardening. The process of rolling the steel after heating and controlling it above the recrystallization temperature is called hot rolling. The process of rolling processing below the recrystallization temperature, including room temperature, is called cold rolling.

The full name of cold work is cold work sheet metal work, also known as "riveting", which is a manufacturing process that makes plates, profiles, wires, pipes, etc. into steel structures through welding, riveting, bolting and other processing methods. The riveter is the conductor in the construction of metal components. According to the processing technology, it is divided into:

Lofting, numbering, blanking, forming, making, calibrating, installation, etc.

Cold work is also known as riveting, and some people also figuratively say that it is an "iron tailor". The work is to process metal plates, profiles and pipes into a variety of metal structural products in accordance with the drawings and technical requirements without changing their cross-sectional characteristics.

And because it is related to welding, it requires a certain welder process knowledge and mastery of certain welder operation skills, and then this type of work is practical, and various problems will be encountered in specific operations, so it is necessary to have a certain ability to learn, understand and express, have strong computing ability and sense of space, body perception and color vision, fingers, arms are flexible, and action coordination ability.

The cold workman is also called a riveter, and it is figuratively said to be an "iron tailor".

It is the category of processing and forming

Size head elbow tee round place funnel or something.

Its staking was previously calculated by hand or **.

But nowadays there are computers that use software.

Steel CAD can be automatic as long as the dimensional parameters are entered.

Out of the overall component diagram and diagram lofting drawing.

And automatically mark all blanking dimensions and component dimensions.

The area of the blanking diagram is automatically given synchronously.

It's much easier and more accurate than artificial intelligence.

Cold work and riveter lofting software: steel CAD

In the past, it was a riveter, a sheet metal worker, but now it is collectively called a cold worker, if a ship is made of wood, it must be done by a carpenter, and if it is iron, it must be done by a cold worker. You can get the idea.

The correct name of cold work should be "cold continuous rolling", which is defined as: a processing method that uses cold work hardening of metal materials to improve the strength, hardness and wear resistance of metal materials.

The process of cold work is:

With hot-rolled steel coil as raw material, cold continuous rolling after pickling to remove the oxide scale, the finished product is rolled hard coil, due to the cold work hardening caused by continuous cold deformation, the strength and hardness of the rolled hard coil rise, and the toughness and plastic index decrease, so the stamping performance will deteriorate, and can only be used for simple deformation parts. Rolled hard coils can be used as raw materials for hot-dip galvanizing plants, because hot-dip galvanizing units are provided with annealing lines. The weight of the rolled hard coil is generally 6 tons, and the inner diameter of the steel coil is 610mm.

Generally, cold continuous rolling plates and coils should be annealed by continuous annealing (CAPL unit) or bell furnace annealing to eliminate cold work hardening and rolling stress, and achieve the mechanical properties specified in the corresponding standards.

The surface quality, appearance and dimensional accuracy of cold-rolled steel plate are better than that of hot-rolled plate, and the thickness of its product is thin to about right, so it is favored by the majority of users.

Cold-rolled steel coils are used as substrates for deep processing of products to become high value-added products. Such as electro-galvanizing, hot-dip galvanizing, fingerprint-resistant electrogalvanizing, color-coated steel coil and vibration-damping composite steel plate, PVC laminated steel plate, etc., so that these products have excellent quality such as beautiful appearance and high corrosion resistance, and have been widely used.

Cold-rolled steel coils must be finished after annealing, including cutting heads, tails, trimming, leveling, leveling, recoiling, or slitting shear plates. Cold-rolled products are widely used in automobile manufacturing, home appliances, instrument switches, construction, office furniture and other industries. The weight of each bale after baling the steel plates is 3 5 tons.

The weight of the flat coil is generally 3 10 tons of coil. The inner diameter of the steel coil is 610mm.

Cold work is all about working at normal temperatures.

In other words, the work of processing the material starts without heating.

Also called riveter's work.

At present, the technical work of the riveters is stakeout.

You can use the software on your computer.

The steel structure CAD automatic lofting out of the blanking drawing.

Such as tee elbow, round place, size head funnel and so on.

It's all fully automated.

The correct name of cold work should be "cold continuous rolling", which is defined as: the processing process of blanking, cutting, forming, joining, etc., using hand tools or machinery to blank, cut, form, and connect metal sheets, profiles and pipe fittings, etc., in order to make various products.

The only purpose of cold work hardening is to increase the hardness of the material! For example, the rails of a train are made of stainless steel. But he can produce cold work hardening under friction, and the surface hardness is getting higher and higher, so the rails basically don't need to be changed for more than a hundred years!

What are the daily car maintenance items? The car is a very complex large machine, and the mechanical parts will inevitably wear and tear during operation, coupled with the influence of external man-made, environmental and other factors, resulting in the wear and tear of the car. According to the driving condition of the car, the manufacturer will formulate the corresponding car maintenance items, what are the common maintenance items?

Project. 1. Small maintenance.

The contents of the minor maintenance:

Minor maintenance generally refers to the routine maintenance items done at the time or mileage specified by the manufacturer to ensure the performance of the vehicle after the car has traveled a certain distance. This mainly includes changing the oil and the oil filter.

Intervals for small maintenance:

The duration of minor maintenance depends on the oil used and the effective time or mileage of the oil filter. The expiration date of mineral engine oil, semi-synthetic engine oil and fully synthetic engine oil is also different for different brand levels, please refer to the manufacturer's recommendation. The oil filter element is generally divided into two types: conventional and long-lasting, and the conventional oil filter element is replaced with the oil, and the long-term oil filter element lasts longer.

Supplies during minor maintenance:

1. Engine oil is the lubricating oil for engine operation. It can lubricate, clean, cool, seal, reduce wear and other functions of the engine. It is of great significance to reduce the wear and tear of engine parts and extend the service life.

2. The oil filter element machine is a part of the oil filter. Engine oil contains a certain amount of gum, impurities, moisture and additives; In the process of engine work, the metal chips generated by the friction of various parts, the impurities in the inhaled air, and the oil oxides are all the objects of the oil filter element. If the oil is not filtered and goes directly into the oil circuit, it will have a detrimental effect on the performance and life of the engine.

Project. Second, major maintenance.

The contents of the big care:

Major maintenance refers to the routine maintenance of oil and oil filters, air filters, and gasoline filters at the time or mileage specified by the manufacturer.

Intervals for major maintenance:

Major maintenance is based on the existence of minor maintenance, and generally these two types of maintenance are carried out alternately. The interval varies depending on the car brand, and the specific details are subject to the manufacturer's recommendation.

Supplies in the big maintenance:

In addition to changing the oil and oil filter, there are two items in the car overhaul:

1. Air filter.

The engine sucks in a lot of air during operation, and if the air is not filtered, the dust in it will accelerate the wear of the piston group and cylinders. Larger particles enter between the piston and the cylinder, which can also cause a serious "cylinder pulling" phenomenon. The function of the air cleaner is to filter out dust and particles in the air and ensure that sufficient and clean air enters the cylinder.

2. Gasoline filter.

The function of the gasoline filter is to provide clean fuel to the engine and filter out the moisture and impurities of the gasoline. This optimizes engine performance and provides the best possible protection for the engine.

Usually, when carrying out car maintenance, the operator will do other inspections according to the specific situation of the car, and will also add other maintenance items, such as the inspection, cleaning and maintenance of engine-related systems, the positioning inspection of tires, the inspection of various fastening parts, and so on.

It is mainly divided into machine repair, circuit, cold work, and painting. Each part can be set up as a maintenance project.

For example: 1 Replace the thermostat.

2 Replace the water temperature sensor plug.

3 Replace the air conditioner belt.

4 Replace the generator belt.

5 Replace the timing belt.

6 Replace the tensioner.

7 Replace the right outer cage repair kit.

8 Strengthen the horizontal screws of the left and right triangular arms.

9 Replace the left and right lower swing arm ball joints.

10 Replace the cylinder head outlet flange (single pass).

11 Replace the water pipe from the outlet flange to the warm air tank.

12 Replenish antifreeze.

13 Reinstall the xenon lamp on the right side.

14 Replace the machine cover cable.

15 Reinstall the rubber bumper strip of the machine cover.

16 Re-weld the carburetor water temperature sensing plug harness.

17 Reinstall the left rear jaw gasket (DIY).

18 Replace the generator regulator.

19 Replace some of the screw-type steel clamps with the original car's self-adjusting steel clamps.20 Clean the carretor.

21 Replace the left reversing mirror.

22 Re-fix the water tank sleeve.

23 Replace the plastic clip of the grille.

24 Install the left door grip frame.

25 Installing the Rear Seat Belt (It's Expensive!) ）

26 Replace the right rear claw pad.

There are a lot, I can't count them, there are many projects with more money, and if there is no money, there is just one project.

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