Every Steel Production Board Is Inspected, and Quality Is Recorded
Samjung operates a systematic quality control system from incoming raw materials through precision machining to final shipment. Through inspection processes tailored to each product's characteristics, we manage dimensional accuracy and flatness, and verify the quality of every product with automated inspection equipment and skilled inspectors. We also systematically manage each product's inspection results and quality history to provide consistent quality and high reliability.
Managing Cut Surfaces for Stable Conveyance
On attach-type conveyors, how the cut surface of the steel production board contacts the equipment matters.
A cut surface close to a right angle helps reduce situations where contact is concentrated at a single point.
Tilted Cut Surface · Point Contact
If the cut surface is tilted, the area in contact with the conveyor guide becomes narrow and localized contact can occur.
Near-Right-Angle Cut Surface · Surface Contact
Securing a more even contact surface is advantageous for managing the position and shaking of the steel production board during conveyance.
Checking the Angle After Cutting
We check the shape of the cut surface and, where necessary, measure squareness with an angle gauge.
Corner and Edge Finishing That Makes the Samjung Difference
Samjung finishes the ends with work safety, prevention of conveyor guard scratches and longer service cycles in mind.
We remove burrs from the four corners and eight edge lines and round the corners according to the requested specifications.
Four-Corner Rounding
Corners are machined into a smooth shape according
to the requested specifications.
Eight-Edge Finishing
After cutting, burrs remaining along
the edge lines are removed.
Dimensional Accuracy That Keeps Product Specifications
Length, width, diagonal dimensions and flatness are checked according to the standards in the product datasheet.
Dimensional Tolerance
W/L ± 1.0(mm)
Diagonal Dimension Tolerance
A-B = within 2 mm
Corner
R19
Angle of Cut Surface
over 89~90°
Thickness
International standard of steel mill
Flatness
under 1.0/1,000(mm)
Edge
Eight Smooth Edges
Why Diagonal Dimension Accuracy Matters
Even if the length and width are the same, if the dimensions in the two diagonal directions differ,
the squareness of the board can differ.
1
It prevents pallets from getting caught in the equipment during conveyor transfer.
2
It prevents steel production boards from shaking on attach-type conveyors.
Dimension Measurement to Check Board Shape
Based on these dimensional standards, we measure length, width and both diagonals together to check the shape of the board.
Both diagonal directions are measured to the same standard to check differences in shape.
Dimensions and flatness are checked according to each product's process and inspection method.
Before Shipment,
Flatness Measurement of Each Board
Before shipment, Samjung measures the unloaded flatness of each steel production board with a high-precision laser scanner. The scan results are used as reference data for checking height deviation on the board surface and reflecting it in shipping quality control.
The specimen test below shows a measurement method that checks the position and height deviation of surface deformation with a linear profile.
Checking Edge Height Difference
Measurement result checking
the gap at the edge on a convex bending specimen.
Measurement Result About 1.5 mm
Difference from Actual MeasurementAbout 0.2 mm difference
Checking Center Deflection
Measurement result checking
the deflection at the center on a concave bending specimen.
Measurement Result About 1.9 mm
Difference from Actual Measurement About 0.2 mm difference
The figures above are test results comparing the scan and the actual measurement of the attached bending specimens.
Results may vary depending on the specimen condition, scan direction and whether a signal filter is applied.
World's First, Only from Samjung:
Individual Board ID Technology for Steel Production Boards
Samjung was the first in the world to apply an individual Board ID to a steel production board.
A unique ID is assigned to each board by RFID or QR, and the individual board's quality data generated during pre-shipment inspection is linked to that ID.
Every board moving through the whole production line
becomes a reference point that connects data.
Production History
Production history and quality data are linked to trace the history of problems.
Product Information
Information on the products produced is checked together with the board's quality data.
Number of Uses
The cumulative number of uses is linked with quality data and used for board inspection.
Maintenance History
Inspection and maintenance records are linked to manage the quality history of each board.
Samjung's Core Quality Competitiveness
Proprietary
Flatness Control Technology
Through the four-stage leveling process, residual stress is relieved and flatness quality, which matters in repeated production environments, is managed precisely.
Data-Based
Quality Verification
Full inspection using 3D laser scanning quantitatively measures and verifies the flatness of each product.
Individual Board ID Technology
Extending to Smart Factories
Each steel production board's unique ID manages material information and quality inspection results, and links to production records and quality history of concrete products, providing a foundation for building a smart factory.
We Review the Quality Standards of Your Production Line Together
Tell us your board dimensions and flatness, your current inspection method and improvement challenges, and we will review the application direction.