China sheet metal processing-when would you choose to use sheet

1.Bending die selection
Bending(China sheet metal processing) molds are divided into standard molds and special bending molds according to the bending process. Under standard bending conditions (right-angle and non-right-angle bending), standard molds are usually used for bending, and special molds are used for bending some special structural parts (such as step bending, pressing dead edges, etc.). In addition, when bending different thickness sheets, the opening dimension “V” of the die under bending is selected differently. Generally, the size of the “V” -shaped slot opening is 6-10 times the thickness of the plate (0.5 ~ 2.6mm is 6t, 3 ~ 8mm is 8t, 9 ~ 10mm is 10t, and 12mm is 12t). When the plate is thin, the orientation is chosen to be a small number, and when the plate is thick, the orientation is chosen to be a large number. For example: when bending a 2mm plate, a 12mmV slot can be used. The standard bending angle is generally not less than 90 degrees, and the sharp angle of the upper and lower dies of the standard bending machine is usually 88 degrees. In the case of non-standard bending, different upper mold shapes can be selected to bend the sheet at different angles and shapes. For special shaped sheet metal parts, special bending molds can be selected for forming and bending.

2. Segmentation of the mold
Generally, the standard length of the bending machine mold is 835mm. In principle, it can only bend large-size work. If the mold is divided into small sections of different lengths, and freely combined through different mold lengths, it can be convenient to bend box-shaped workpieces or boxes of different lengths. In the industry, the segmentation of the bending mold has a standard segmentation size, such as: standard segmentation 835 segments: 100 (left ear), 10, 15, 20, 40, 50, 200, 300, 100 (right ear) = 835mm. Of course, it can also be divided according to user requirements.

3. Calculation of bending force If we want to bend a relatively large and thick plate, we must first understand the required bending tonnage force. Then we can calculate the tonnage required for bending (recommended that the pressure required for bending of the workpiece is within 80% of the rated tonnage of the equipment). Through calculation, we can also determine the tonnage required for bending. The choice also affects the bending force.

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