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A worker is observing the condition of perforated metal sheet produced by the punching machine.

TO BE BETTER,

BECOME THE INDUSTRY LEADING BRAND.

Strict Quality Control System Ensures The Quality of Finished Products

We have established a complete set of quality control system. All workers must pass post assessment before taking up the position and produce according to international standards. Strict inspection runs through all production links to ensure all products are qualified before storing in the warehouse. We implement our quality control system from the following aspects.

Certification & Standard

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Characteristics Detection Method Detection Results
Hole Size (Thickness ≥ 3 mm)
Round hole at 60 ° stagger ISO 7805-1_1984 3.15 mm – 125 mm
Square hole ISO 7805-1_1984 3.15 mm – 125 mm
Tolerance on average size (Thickness ≥ 3 mm)
Round hole at 60 ° stagger ISO 7805-1_1984 ±0.15 mm ~ ± 3 mm
Square hole ISO 7805-1_1984 ±0.15 mm ~ ± 3 mm
Pitch Size (Thickness ≥ 3 mm) ISO 7805-1_1984 6.3 mm – 160 mm
Tolerance on average size (Thickness ≥ 3 mm) ISO 7805-1_1984 ±0.02 mm ~ ±2.9 mm
Hole Size (Thickness < 3 mm)
Round hole ISO 7805-2_1987 0.5 mm – 10 mm
Square hole ISO 7805-2_1987 2 mm – 10 mm
Tolerance on average size (Thickness < 3 mm)
Round hole ISO 7805-2_1987 ±0.1 mm ~ ± 0.35 mm
Square hole ISO 7805-2_1987 ±0.2 mm ~ ± 0.35 mm
Pitch Size (Thickness < 3 mm) ISO 7805-2_1987 6.3 mm – 160 mm
Tolerance on average size (Thickness < 3 mm) ISO 7805-2_1987 ±6.3 mm ~ ±18 mm
Tolerances on width and length ISO 10630_1994 ±0.8 mm ~ ± 12 mm
Tolerance on squareness ISO 10630_1994 ±0.75 mm ~ ± 5 mm
Tolerance on flatness ISO 10630_1994 ±10 mm ~ ± 30 mm
Maximum height of burrs ISO 10630_1994 ±0.15 mm ~ ± 0.75 mm
Perforated opening size
Round Opening ASTM E674-12 0.5 mm – 125.0 mm
Square Opening ASTM E454-12 3.25 mm – 125.0 mm
Tolerance on openings
Round Opening ASTM E674-12 ±0.04 mm ~ ±2.5 mm
Square Opening ASTM E454-12 ±0.17 mm ~ ±2.5 mm
Tolerance on bars
Round Opening ASTM E674-12 ±0.06 mm ~ ±3.2 mm
Square Opening ASTM E454-12 ±0.20 mm ~ ±3.2 mm
Tolerance on thickness
Round Opening ASTM E674-12 ±0.18 mm ~ +1.00 mm/-0.25 mm
Square Opening ASTM E454-12 ±0.18 mm ~ +1.00 mm/-0.25 mm

WORKER TRAINING

As we all know, skilled workers are big assets of manufacturing enterprises and a strong guarantee of smooth and efficient production. All workers in the plant must be trained for 1 or 2 months before taking up their position. Only those who passed the training test can mount guard.

Their duties include operating machines, observing machine running conditions and finished products conditions.

The worker is observing the flatness of the finished products.

MANUFACTURING STANDARDS

  • Margin Tolerance

    Margin width will confirm with our customers. And we will inspect margin based on the following standards.

    • GB/T 10613 & ISO 10630 (plate thickness ≥ 3.0 mm)
    • GB/T 10612 & ISO 10630 (plate thickness < 3.0 mm)
    Tolerance on Width of Margins in Accordance with GB/T 10613, 10612 & ISO 10630 (Unit: mm)
    Nominal Pitch, p Tolerance on Width of Margins, e, f
    p ≤ 5, open area ≤ 25% ±5
    p ≤ 5, open area > 25% ±10
    5 < p ≤ 20 ±10
    20 < p ±0.5p
  • Width & Length Tolerance

    Width and length refer to plates before perforating.

    Skilled Workers and advanced equipment can guarantee the products within standard tolerances. The standard tolerances are listed in the table below.

    Tolerance on Width and Length in Accordance with GB/T 19360-2003 & ISO 10630 (Unit: mm)
    Width (a1) & Length (b1) Plate Thickness (t)
    t ≤ 3 3 < t ≤ 5 5 < t ≤ 10 10 < t ≤ 12.5
    a1 & b1 ≤ 100 ±0.8 ±1.1 ±1.5 ±2
    a1 > 100 or b1 ≤ 300 ±1.2 ±1.6 ±2 ±3
    a1 > 300 or b1 ≤ 1000 ±2 ±2.5 ±3 ±4
    a1 > 1000 or b1 ≤ 2000 ±3 ±4 ±5 ±6
    a1 > 2000 or b1 ≤ 4000 ±4 ±6 ±8 ±10
    a1 or b1 > 4000 ±5 ±8 ±10 ±12
  • Squareness

    Squareness, refers cut perforated metal plates is quantified by the orthogonal projection of a transverse edge (plate width a1) onto a longitudinal edge (plate length b1).

    The squareness of perforated metal sheet shall comply with GB/T 19360-2003 & ISO 10630 standard.

    Tolerance on Squareness in Accordance with GB/T 19360-2003 & ISO 10630 (Unit: mm)
    Nominal Plate Thickness, t Tolerance on Squareness as A Percentage of a1
    t ≤ 3 0.75
    3 < t ≤ 5 1.5
    5 < t ≤ 10 3
    10 < t ≤ 12.5 5
  • Surface Flatness

    All production will ongoing according to GB and ISO standard.

    Twice inspection will be conducted during and after production.

    • Hole size ≤ 200 mm
    • Margin ≤ t + 0.5p
    • Open area ranges from 20% to 40%
    Tolerance on Flatness in Accordance with GB/T 19360-2003 & ISO 10630 (Unit: mm)
    Width (a1) & Length (b1) Plate Thickness (t)
    t ≤ 0.7 0.7 < t ≤ 1.2 1.2 < t ≤ 3 3 < t ≤ 5 5 < t ≤ 12.5
    a1 & b1 ≤ 1200 20 18 15 12 10
    a1 > 1200 or b1 ≤ 1500 28 22 18 16 14
    a1 > 1500 or b1 ≤ 2000 30 25 20 16 14
  • Defects

    We will inspect the samples and products according to the following standards to reduce the manufacturing defects.

    In accordance with GB/T 19360-2003 & ISO 10630 standard, we will check if our products have manufacturing defects as listed below.

    • Breakaway on holes
    • Burrs on holes and shearing burrs
    • Edge bow (camber)
    • Wavy edge
    • Missing holes
    • Missing holes

      Manufacturing defect missing holes diagram
    • Breakaway on holes

      Manufacturing defect breakaway on holes
    • Edge bow (camber)

      Manufacturing defect edge bow
    • Wavy edge

      Manufacturing defect wavy edge
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