Most commonly, shear is used to cut the board parallel to the existing edges that maintain the square shape, but angled cuts are also possible. Therefore, shearing is mainly used to cut sheets into smaller sizes in preparation for other processes.
Choice of different cutting techniques
1. When the cutting accuracy is high, you can choose laser cutting or plasma cutting process. The cuts produced by these two processes are of good quality and are suitable for stainless steel plates that require higher cutting accuracy.
2. When the cutting speed requirements are high, you can choose laser cutting, flame cutting or water jet cutting process. These processes have faster cutting speeds and are suitable for occasions that require higher production efficiency.
3. When the cutting cost requirements are low, you can choose the flame cutting process. Flame cutting equipment has low cost, is easy to operate, and is suitable for some occasions with limited economic conditions.
4. When cutting thicker stainless steel plates, you can choose the flame cutting process. Flame cutting is suitable for thicker stainless steel plates and can be cut efficiently.
5. When the requirements for the heat-affected zone generated during the cutting process are low, you can choose waterjet cutting or laser cutting technology. Waterjet cutting and laser cutting do not produce heat-affected zones and have good incision quality, and are suitable for occasions with high heat-affected requirements.
The shearing process is carried out on shears, often called square shears or power shears, which can be operated manually (by hand or foot) or by hydraulics, pneumatics or electric power. A typical shear consists of a table with support arms for holding the sheet, stops or guides for holding the sheet, upper and lower straight-edged blades, and a metering device for accurately positioning the sheet. The sheet is placed between the upper and lower blades, and the upper and lower blades are pressed together against the sheet to cut the material. In most units, the lower blade remains stationary while the upper blade is forced downward. The upper blade is slightly offset from the lower blade, approximately 5-10% of the sheet thickness. Additionally, the upper blade is usually angled so that the cut proceeds from one end to the other, thus reducing the force required. The blades used in these machines usually have a square edge rather than a knife-shaped edge.