Sheet Metal Fabrication Service Processing steps For Sheet Metal Parts - Custom Sheet Metal Fabrication Service Company
10. Assembly. The so-called assembly is to group multiple parts or components together in a certain way to make them into a complete material. One thing that needs to be paid attention to is the protection of the materials, and no scratches. Assembly is the last step in the completion of a material. If the material cannot be used due to scratches, it needs to be reworked and reworked, which will waste a lot of processing man-hours and increase The cost of the item. So pay special attention to the protection of the item.
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What is the most important thing about a car? Of course, the three major parts of the car, the engine, transmission, chassis, there are a lot of users on the Internet have responded to the situation of their own car leak, which in the end is the quality of the problem or other reasons? In fact, whether the car is a new car or an old car, the problem of oil leakage may still occur. In the end is why?
Neither the engine nor the gearbox is a whole, nor is it totally sealed. An assembly is a combination of hundreds of small parts, and we have to rely on "oil" for lubrication, heat dissipation, etc. Therefore, the occurrence of oil leakage is very common, and the leaking places are the joint positions and the positions near the bearings. Therefore, we can follow the oil traces to find out the leakage.
In the following situations, the oil leakage screw will surely not be tight and slippery; the most common place is the fixing screw of the oil pan (it is easy to break off with too much force). It is very troublesome to take it out, and you have to use it. Professional tools can solve the problem. If the torque is not enough, it will seep out of the surrounding oil.
Oil drain screws (oil discharge screws for engines and gearboxes. The phenomenon of slipping is common due to frequent dismantling); some models (such as Toyota) have disposable gaskets on the drain screws, and each replaces. Once the oil needs to be replaced, many times the gasket failure will lead to oil leakage, and the drain screw appears slippery wire, most of the maintenance workers will choose to put waterproof adhesive tape on the bread, and then play sealant practice. But the professor thinks it's better to change the screw.
The oil filter screw (the mounting machine oil grid too hard will appear the situation of sliding teeth); directly replace the filter screw, but the probability is not high, the general appearance of the slide wire is the screw thread on the oil filter, Professor needs to remind is the oil The filter does not need to be tightened too tightly.
Oil seal aging; Oil seal is also called oil guard ring, which is an indispensable non-metallic fitting in the car to keep rotating parts, mainly to prevent sediment, dust, water and gas from invading the bearing from the outside and limiting the leakage of the oil in the bearing. Once there is aging, it will surely leak oil. Most of the oil spills are the front oil seal of the engine and the axle shaft oil seal on the transmission. They are generally leaky, and which of the oil seals will be directly replaced will solve the problem.
Sealing gasket aging; General engine will have valve chamber cover gasket, engine cylinder gasket and oil pan gasket (some will use sealant instead), as long as the above three gasket problems, will lead to oil leakage At this time, you need to replace the gasket.
What should I do if I find an oil leak?
The occurrence of oil leakage on the engine and gearbox is mainly divided into the following types. One is clear leakage, the other is leakage and the other is oil dripping.
Most of the reasons for leaking are because you have worn the oil sump. This is a clear leak. You should not choose to continue driving. You should call for assistance. Otherwise, if you continue to drive down, your car will show Lava, Locked up and finally overhauled the engine.
Leakage refers to the presence of oil traces on the engine block, and even a layer of black sludge may be adhering to the vicinity. In the event of such a leak, there is no need for rush repair.
Dropping oil, after staying in the car for a period of time, it will be found that there will be traces of oil underneath the car, which is generally a poor seal of the oil pan, oil leakage, slippery oil leakage, and this happens even though the oil is not for a short time. Will leak light, but it is recommended to replace it as soon as possible.
The professor concluded: Some people must come back and ask the professor. Can you find that the car could not be opened if it leaks? As long as it is not a large area of ​​oil leakage can be opened, found that there is a large area of ​​oil spill or drop of oil, the most quickly go to the repair shop to replace the accessories, otherwise by the time it went to even the oil is leaking, and you Not worth the candle.
1. Design and draw the part drawing of its sheet metal parts, also known as three views. Its function is to express the structure of its sheet metal parts by means of drawings.
2. Draw an unfolded drawing. That is, unfold a part with a complicated structure into a flat piece.
3. Unloading. There are many ways to unload, mainly the following methods:
a. Shearing machine cuts the material. It uses the shearing machine to cut out the length and width dimensions of the expanded drawing. If there are punching and corner cutting, then the punching machine is combined with the die to punch and corner to form.
b. Punch blanking. It is the use of a punch to punch the structure of the flat part after the parts are unfolded on the plate in one or more steps. Its advantages are short labor hours, high efficiency, and can reduce processing costs. It is often used in mass production.
c. NC CNC blanking. When NC blanking, you must first write a Cnc Machining program. That is, use the programming software to write the drawn expanded diagram into a program that can be recognized by the NC CNC machining machine. Let it follow these programs step by step on a piece of iron plate On the top,punch out the structural shape of its flat parts.
d. Laser cutting is the use of laser cutting to cut the structure and shape of the flat piece on an iron plate.
4. Flanging and tapping. Flanging is also called hole extraction, which is to draw a slightly larger hole on a smaller base hole, and then tap the hole. This can increase its strength and avoid slippage. Generally used for sheet metal processing with relatively thin plate thickness. When the plate thickness is large, such as the plate thickness of 2.0, 2.5, etc., we can tap directly without flanging.
5. Punch processing. Generally, punch processing includes punching and cutting corners, punching blanking, punching convex hull, punching and tearing, punching and other processing methods to achieve processing purposes. Its processing requires corresponding molds to complete the operation. There are convex molds for punching convex hulls, and tearing forming molds for punching and tearing.
6. Pressure riveting. As far as our factory is concerned, pressure riveting studs, pressure riveting nuts, pressure riveting screws, etc. are often used. The pressure riveting method is generally completed by a punch or hydraulic pressure riveting machine. Riveted to the sheet metal part.
7. Bending. Bending is to fold 2D flat parts into 3D parts. Its processing requires a folding bed and corresponding bending molds to complete the operation. It also has a certain bending sequence, and the principle is to make the next cut The first fold that does not cause interference will produce the interference back fold.
8. Welding. Welding is the group welding of multiple parts together to achieve the purpose of processing or the edge welding of a single part to increase its strength. The processing parties generally include the following: CO2 gas shielded welding, argon arc welding, Spot welding, robot welding, etc. The selection of these welding methods is based on actual requirements and materials. Generally speaking, CO2 gas shielded welding is used for iron plate welding; argon arc welding is used for aluminum plate welding; robot welding is mainly in-material It is used when the parts are large and the welding seam is long. Such as cabinet welding, robot welding can be used, which can save a lot of tasks and improve work efficiency and welding quality.
9. Surface treatment. Surface treatment generally includes phosphating film, electroplating colorful zinc, chromate, baking varnish, oxidation, etc. Phosphating film is generally used for cold-rolled plates and electrolytic plates, and its function is mainly to plate on the surface of the material. A protective film is applied to prevent oxidation; the second is to enhance the adhesion of its baking paint. Electroplated multicolored zinc is generally treated with cold-rolled plate surface treatment; chromate and oxidation are generally used for surface treatment of aluminum plates and aluminum profiles; its specific surface The choice of treatment method is based on the customer's requirements.
