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Common Issues and Solutions in Sheet Metal Bending Processing
Category:
News
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Published:
2025/09/05
Summary:
During sheet metal bending processes, various issues frequently arise. Understanding these common problems and their corresponding solutions can provide remedies for subsequent bending challenges, thereby achieving rapid and efficient production.
Common Issues and Solutions in Sheet Metal Bending Processing
During sheet metal bending processes, various issues frequently arise. Understanding these common problems and their corresponding solutions can provide remedies for subsequent bending challenges, thereby achieving rapid and efficient production.
First, a. Issue: The workpiece deforms at the bend after bending.
b. Cause: The deformation primarily occurs due to the bending speed being too fast, while the hand fails to keep up with the workpiece's bending speed.
c. Solution: Reduce the bending speed and manually support the workpiece in sync with the bending process.
Second, a. Issue: When bending longer workpieces, the angles may vary with one end larger and the other smaller.
b. This situation generally arises due to the following circumstances:
(1). Inconsistent material thickness, with one end being thick and the other thin.
(2). Uneven mold wear, resulting in different heights at both ends.
(3). The spacer block is unbalanced and not on the same level.
c. Solution:
(1) Feedback to laser or NCT, and let them pay attention to material selection.
(2). Replace the die.
(3). Adjust the spacer block.
Third, a. Issue: During Z-bending, certain workpieces may deform.
b. Cause: This primarily occurs because the C section serves as the back gauge positioning point. When bending the B section, the workpiece's upward curling motion collides with and gets squeezed by the back gauge. After the bending is completed, the D section becomes deformed due to this compression.
c. Solution: Utilize the back gauge retraction function.
Fourth, a. Issue: The bending dimension is too small for accurate positioning, making it easy for the upper die to press against the back gauge.
b. Cause: Since t=0.8, following the lower die selection principle, v=5×0.8=4mm. The distance from the 4v center to the edge is 3.5mm, while the internal dimension of 2.9mm is 2.9-0.8=2.1mm. The bending dimension falls within the distance from the v centerline to the edge, making positioning impossible when installed normally. Attempting to invert the lower die results in the upper die pressing against the back gauge. Neither normal nor inverted installation works, necessitating alternative solutions.
c. Solution: ○1 The lower die can be installed inverted. Add a spacer (not exceeding 3t) in front of the back gauge to allow the back gauge to retreat, avoiding interference with the upper die. ○2 If the dimension at the other end is ≧3, positioning can also be achieved using the other end. Install the lower die inverted.
Keyword:
Xinqisheng
Precision Sheet Metal
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