How Servo Tracking Hydraulic Punching & Shearing Machine Optimizes Product Quality of Cold Bending Forming Machines via Precise Processing & Burr-Free Cuts

The servo tracking hydraulic punching & shearing machine acts as a "quality refinement tool" for cold bending forming machines, solving the common defects of traditional cold bending production—such as uneven cutting burrs (height ≥0.1mm) and imprecise punching (hole diameter deviation ±0.3mm). By leveraging high-pressure hydraulic systems and servo-controlled precision, it ensures the cold bending forming machine’s output profiles meet strict industry standards (e.g., GB/T 6725-2016 for cold-formed steel), reducing subsequent processing steps and improving customer satisfaction.

1. High-Precision Punching Ensures Consistent Hole Quality for Cold Bending Formed Profiles
   Traditional mechanical punching equipment for cold bending forming machines often produces holes with irregular edges or diameter deviations due to unstable punching force (fluctuation ±5%). The servo tracking hydraulic punching & shearing machine addresses this with its advanced hydraulic system:

• Stable hydraulic pressure control: It uses a proportional pressure valve to maintain punching force stability (±1% of the set value, typically 30-80kN depending on material thickness). For example, when punching 8mm-diameter holes in 3mm-thick Q355B C-steel, the stable force ensures hole diameter tolerance is controlled within ±0.05mm, meeting the precision requirements of automotive frame mounting holes.
• Servo-driven punch positioning: The punch’s vertical movement (stroke 50-100mm) is controlled by a servo motor, ensuring the punch enters the material at a constant speed (50-80mm/s) and avoids "overshooting"—a common cause of hole edge deformation in traditional machines. This reduces hole edge roughness from Ra 1.6μm to Ra 0.8μm, eliminating the need for secondary deburring of holes.
  For cold bending forming machines producing electrical cabinet U-steel (requiring multiple precision mounting holes), this punching precision reduces hole-related assembly errors by 70-80%, shortening on-site installation time by 20-30%.

2. Burr-Free Shearing Enhances Surface Quality of Cold Bending Formed Profiles
   Traditional shearing equipment for cold bending forming machines leaves burrs on the cut edge (height 0.1-0.2mm) due to dull blades or improper shear gap. These burrs not only affect the profile’s appearance but also pose safety risks (e.g., operator cuts during handling) and require manual grinding (costing $0.3-0.5 per meter of profile). The servo tracking hydraulic punching & shearing machine achieves burr-free cutting through two key technologies:

• Optimized shear gap adjustment: It automatically calculates the optimal shear gap (10-15% of material thickness) based on the cold-formed profile’s thickness (1.5-6mm) and material type (e.g., 0.3mm gap for 3mm Q235 steel). The servo system adjusts the upper and lower shear blades in real time to maintain this gap, ensuring clean, straight cuts.
• High-hardness blade materials: The shear blades are made of H13 hot-work die steel with surface quenching (hardness HRC 58-62), which maintains sharpness for 50,000+ cuts—twice the lifespan of traditional SKD11 blades. Sharp blades avoid material tearing at the cut edge, keeping burr height ≤0.02mm (meeting the "burr-free" standard of ASTM A480/A480M).
  For cold bending forming machines producing high-end architectural C-steel (requiring visible cut edges), this burr-free technology eliminates manual grinding, saving $2,000-$3,000 in labor costs monthly for a medium-sized production line.

3. Integrated Punching & Shearing Reduces Process Complexity for Cold Bending Forming Machines
   Traditional cold bending production requires separate punching and shearing equipment, which increases process complexity (2-3 transfer steps) and the risk of profile damage (e.g., scratches during transfer). The servo tracking hydraulic punching & shearing machine combines both functions in one unit, installed directly after the cold bending forming machine:

• One-pass processing: The cold-formed profile is punched and sheared in a single continuous process, eliminating intermediate transfers. This reduces profile damage rates from 5% to <1% and shortens the overall production cycle by 15-20%.
• Unified quality control: The machine’s integrated PLC system synchronizes punching and shearing parameters with the cold bending forming machine’s output, ensuring consistent quality across all profiles in a batch. For example, if the cold bending machine adjusts the profile’s flange height, the punching & shearing machine automatically updates the hole position to maintain alignment.

Practical Quality Maintenance Tips for Integration
When equipping cold bending forming machines with the servo tracking hydraulic punching & shearing machine:

• Inspect shear blade sharpness weekly; regrind blades when burr height exceeds 0.03mm.
• Calibrate hydraulic pressure monthly using a pressure gauge to ensure stability within ±1%.
• Clean the punching die and shear blade area daily to remove metal shavings, which can cause punch jams or blade damage.

For manufacturers, this quality upgrade not only improves the cold bending forming machine’s output quality but also streamlines production processes, reducing both labor costs and customer rejection rates (by 60-70%), which is crucial for competing in high-end markets such as automotive and architectural engineering.

For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com