Sheet metal stamping parts processing process
For any sheet metal part, it has a certain degree of sheet metal stamping part processing, which is the so-called process flow. With the difference in the structure of sheet metal parts, the process flow may be different, but the total does not exceed the following Point.
1. Design and draw the part drawing of its sheet metal parts, also called three views. Its function is to express the structure of its sheet metal parts by drawing.
2. Draw an unfolded drawing. That is, unfold a complex part into a flat piece.
3. Cutting. There are many ways of cutting, mainly the following methods:
a. Shearing machine blanking. It is the use of a shearing machine to cut out the length and width dimensions of the unfolded 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 uses a punch to punch the flat part structure of the part after unfolding the part on the plate in one or more steps. Its advantages are that it consumes short working 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 top, punch out the structural shape of its flat parts.
d. Laser blanking 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 cut the next cut The first folding that does not produce interference will produce the interference backward folding.
8. Welding. Welding is to weld 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 used for large parts and long welds. It can be used when welding. For cabinet welding, robot welding can be used, which can save many 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 the surface of the material Put a protective film on it to prevent oxidation; then it can enhance the adhesion of the paint.
Electroplating multicolored zinc is generally used for surface treatment of cold rolled plates; chromate and oxidation are generally used for surface treatment of aluminum plates and aluminum profiles;
The selection of the specific surface treatment method is based on the customer's requirements
