Key Points for Cost Reduction in Segmented Bending

1. Optimization of Drawings and Pre-process

1) Minimize the number of segmented bends. Avoid segmentation whenever possible, reducing time spent changing workstations and repetitive clamping. When full-segment bending is not possible, rationally divide the bending segments to avoid excessively long short segments.

2) Standardize the bending benchmark. All segments should share the same positioning edge to reduce debugging and alignment time, lowering machine setup losses and scrap rates.

3) Optimize process gaps and avoidance points to prevent compression deformation at the junctions of segmented bends, reducing subsequent grinding and rework costs.

2. Process Control

1) Optimize the bending sequence. Prioritize bending in a unified direction to reduce repeated workpiece flipping and loading/unloading, compressing process time.

2) Use dedicated positioning blocks for batch parts to eliminate the need for manual fine-tuning of each segment, reducing manual debugging time and improving the efficiency of repetitive processing.

3) Pre-compensate for springback. Since springback varies between segmented bends, pre-compensate in the program to reduce material loss caused by repeated trial bending.

3. Equipment and Production Scheduling

1) Centralize the production of segmented bending workpieces of the same specifications and centrally debug the molds to avoid wasting time due to frequent mold changes and machine adjustments.

2) Select CNC bending equipment suitable for segmented bending of long parts. Programs can be saved and recalled, eliminating the need for reprogramming for secondary production of the same product.

4. Material and Post-processing Cost Reduction

1) Control the precision of sheet metal cutting. Cutting errors will amplify the cumulative errors in segmented bending, leading to rework and scrap.

2) Control the segment splicing gap. Excessive gaps require welding and grinding, while insufficient gaps result in bulges. Reasonably reserve process gaps to reduce post-processing costs such as welding, grinding, and correction.

5. Quality Reduction to Reduce Hidden Costs

The largest cost loss in segmented bending comes from cumulative dimensional deviations and splicing misalignments leading to scrap. Conduct full-dimensional inspection of the first piece and random sampling during batch production to reduce scrap and rework costs.