In the process of sheet metal processing and bending, many problems are often encountered. Understanding these common problems and their solutions can provide solutions for the problems encountered in subsequent bending, so as to achieve the purpose of fast and efficient production.
Common problems and solutions
1.a. Problem: After the sheet metal is bent, the workpiece is deformed at the bend.
b. Reason: The deformation is mainly caused by the fast bending speed, and the hand does not keep up with the bending speed of the workpiece.
c. Solution: reduce the sheet metal bending speed, and hold the workpiece and the workpiece at the same time.
2.a. Problems: When bending a long workpiece, the angle will be large at one end and small at the other.
b. When this happens, it is generally caused by the following situations:
(1). The thickness of sheet metal materials is inconsistent, one end is thick and the other end is thin.
(2). The sheet metal mold wears unevenly, and the heights at both ends are different.
(3). The middle block is unbalanced and not on the same level.
c. Solution:
(1). Feedback to the laser or NCT, let it pay attention to the material selection.
(2). Change the tool die.
(3). Adjust the middle block.
3.a. Problem: When bending Z-fold, some workpieces will be deformed.
b. Cause: This situation occurs mainly because the position C is the back gauge. When bending B, the workpiece bends and moves upward, hits the back gauge, and is squeezed by the back gauge. After bending, D was squeezed out of shape.
c. Solution: adopt the function of pulling back after setting the rule.
4.a. Problems: The bending size of sheet metal is small, it is not easy to locate, and the upper die is easy to press on the back gauge.
b. Reason: Because t=0.8, press the die selection principle, v=5×0.8=4mm. The distance from the center to the edge of 4v is 3.5mm, while the inner dimension of 2.9mm is 2.9-0.8=2.1mm, and the bending dimension Within the distance from the center line of v to the side, it cannot be positioned when it is formally installed.
If the lower mold is installed in reverse, the upper mold will be pressed and then set the gauge, and it will not work if the front and back are installed.
c. Solution: ○1 The lower die can be installed in reverse. Add a gasket (no more than 3t) before the rear gauge, so that the rear gauge can be moved back and avoid the upper die
○2 If the size of the other end is ≧ 3, the other end can also be used to seat. The lower die is installed in reverse.
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