Sheet Metal Punching

Sheet Metal Blanking is a Part of Sheet Metal Processing. The above blanking methods can meet various sheet metal processing requirements.

There are various ways to cut sheet metal, mainly including the following ways:

1)Shearing. The utility model uses a shearing machine to cut strips and simple materials. It is mainly prepared for die blanking and forming. The cost is low and the accuracy is less than 0.2, but it can only process strips or blocks without holes and corners.

2) Punching. It is to use the punch to punch the flat parts after unfolding the parts on the plate in one or more steps to form materials of various shapes. Its advantages are short working hours, high efficiency, high precision and low cost. It is suitable for mass production, but the mold should be designed.

3) NC Blanking. When NC blanking, first write the NC machining program, and use the programming software to write the drawn expansion drawing into the recognizable program of NC digital drawing machine tool, so that it can punch the flat parts of various structural shapes on the flat plate step by step according to these programs. However, its structure is affected by the tool structure, with low cost and accuracy of 0.15.

4) Laser Blanking. It uses the laser cutting method to cut the structural shape of its flat plate on the large flat plate. Like NC blanking, it needs to write a laser program. It can cut flat plate parts with various complex shapes, with high cost and accuracy of 0.1.

5)Sawing Machine. mainly used for aluminum profiles, square tubes, drawing tubes, round bars, etc. with low cost and low precision.

According to the different machining methods of mechanical parts, burr can be divided into forging burr, casting burr, stamping burr, cutting burr, plastic forming burr and so on. In the process of machining, burr is everywhere. No matter how advanced and precise equipment you use, it will be born with the product. So We’ll share some ways to remove burrs.

1. Manual Deburring

Manual deburring is also a common method used by general enterprises. It uses files, sandpaper, grinding heads and so on as auxiliary tools. The labor cost is expensive, the efficiency is not very high, and it is difficult to remove complex cross holes. The technical requirements for workers are not very high, so it is suitable for products with small burr and simple product structure.

2. Chemical Deburring

Chemical deburring is to put the cleaned metal parts into the chemical solution, so that the metal on the surface of the parts will be transferred to the solution in the form of ions. These ions gather on the workpiece surface and form a viscous film with high resistance and low conductivity through chemical reaction to protect the workpiece surface from corrosion. The burr protrudes from the surface, and the chemical reaction will remove the burr. It has the advantages of high production efficiency, can remove burrs in large quantities and save a lot of labor. The labor intensity is reduced, the deburring effect is very ideal, and the economic

benefit of the enterprise can be improved.

3. Freeze Deburring

The burr is quickly embrittled by cooling, and then the burr is removed by shot blasting. The price of freezing deburring equipment is about US $30000 to US $50000, which is suitable for products with small burr wall thickness and small products.

4. Water Jet Deburring

5. Grinding and Deburring

Such deburring methods include vibration, sand blasting, roller and other methods, which are widely used by enterprises at present. There is a problem that the removal is not very clean. It may be necessary to deal with the residual burr manually or cooperate with other methods to remove the burr. Grinding and deburring is suitable for small products with large batch.