Marking High Strength Steel Automotive Body Parts
Introduction
High strength steel (HSS) and hot-formed steel are increasingly used in automotive body structures to reduce weight while maintaining crash performance. However, marking these materials presents unique challenges: their hardness and yield strength can cause shallow, illegible marks that fail traceability requirements. This article examines the technical considerations for marking high strength steel body parts, focusing on deep laser marking technology that achieves permanent, readable identification. We will cover the working principle, key features, applications, and benefits of deep laser marking systems designed for automotive mass production.
Understanding High Strength Steel in Automotive Body Parts
High strength steel typically refers to steels with yield strength above 300 MPa, while advanced high strength steels (AHSS) such as hot-formed steel can reach 1500 MPa. These materials are common in body-in-white components like B-pillars, door beams, and roof rails. Their mechanical properties improve occupant safety and reduce vehicle weight, but they also resist conventional marking methods. A durable, deep mark is essential for VIN (Vehicle Identification Number) and component traceability, which are required for regulatory compliance and quality control.
Product Overview: Deep Laser Marking Machine
The KINMARK Deep Laser Marking Machine is specifically engineered for permanent VIN deep marking on high strength steel plates. It achieves a marking depth of ≥0.2 mm on body-in-white, ensuring legibility even after painting and rubbing. The system is designed for easy integration with industrial robots and assisted manipulators, making it suitable for automated production lines. Optional vision guidance and 3D scanning systems enable precise positioning and online quality inspection.
Technical Specifications
| Power Supply | AC220V ±10%, 50Hz ±2% |
| Power Consumption | <1000W |
| Laser Power | 200W |
| Marking Area | 112mm × 112mm |
| Marking Depth | ≥0.2mm |
| Operating Temperature | 0~40℃ |
| Operating Humidity | ≤90% RH (Non-condensing) |
Working Principle of Deep Laser Marking
Deep laser marking uses a high-power laser beam to melt and vaporize material, creating a permanent cavity in the steel surface. The process is controlled to achieve a consistent depth without compromising the material's structural integrity. The KINMARK system employs a special marking process that ensures clear rubbing results after painting—critical for VIN verification. The laser beam is directed by a galvanometer scanner, and the marking area is defined by the 112mm × 112mm field. The system can be integrated with robots or manipulators for automated positioning.
Key Features
Deep VIN Marking: Achieves ≥0.2mm depth on high strength steel (yield strength >700 MPa) and hot-formed steel (up to 1500 MPa).
Easy Rubbing: Special marking process ensures clear rubbing after painting.
Easy Integration: Various mounting interfaces for quick integration with robots or assisted manipulators.
Vision Guidance (Optional): 3D vision system for precise positioning and accurate marking.
Automatic Traceability (Optional): 3D laser scanning and OCR recognition for online marking quality inspection and 100% traceability.
Applications in Automotive Manufacturing
The Deep Laser Marking Machine is designed for marking VINs and component codes on high strength steel body parts. Typical applications include:
Body-in-white VIN marking on B-pillars, door beams, and other safety-critical components.
Traceability marking on hot-formed steel parts.
Integration into automated production lines with robotic handling.
Online quality inspection using optional 3D scanning and OCR.
These applications are common in automotive manufacturing, particularly for electric vehicles and lightweight body structures where high strength steel is prevalent. KINMARK also provides integrated marking machine solutions for industrial production applications.
Benefits of Deep Laser Marking for High Strength Steel
Deep laser marking offers several industrial benefits for marking high strength steel body parts:
Permanent identification: The deep mark survives painting and harsh environments, ensuring long-term traceability.
Process consistency: Controlled depth and clear characters reduce rework and scrap.
Production integration: Easy robot integration enables automated marking within existing lines.
Quality management: Optional online inspection provides 100% verification of mark quality.
These benefits contribute to efficient, reliable automotive manufacturing without relying on unverified performance claims.
Note: The optional vision guidance and 3D scanning systems are available for enhanced positioning and traceability. Consult KINMARK for configuration details.
Why Choose KINMARK for High Strength Steel Marking
KINMARK (Jinan Zhongzheng Jinma Technology Co., Ltd.) has been developing marking and traceability systems since 1996. The company is a Shandong Province "Gazelle" and "Specialized and New" enterprise, with a focus on automotive intelligent automation equipment. KINMARK's deep laser marking system is the result of years of collaboration with automotive manufacturers. The system is designed for mass production, with a 12-month warranty, fast response service, and installation & commissioning support. While specific customer names cannot be disclosed, KINMARK has established long-term relationships with leading automotive companies in China and globally.
Frequently Asked Questions
What is the maximum marking depth achievable on high strength steel?
The KINMARK Deep Laser Marking Machine achieves a marking depth of ≥0.2mm on body-in-white, suitable for VIN and traceability requirements.
Can the system mark hot-formed steel with strength up to 1500 MPa?
Yes, the system is designed to mark VINs on hot-formed steel plates with strength up to 1500 MPa, as well as high strength steel with yield strength exceeding 700 MPa.
Is the marking still readable after painting?
Yes, the special marking process ensures clear rubbing results after painting, maintaining legibility for VIN verification.
What optional systems are available for quality inspection?
Optional 3D vision guidance and 3D laser scanning with OCR recognition are available for precise positioning and 100% online traceability.
How does the system integrate with production lines?
The system features various mounting interfaces for quick integration with industrial robots or assisted manipulators, enabling automated marking within existing lines.
Conclusion
Marking high strength steel automotive body parts requires a reliable, deep marking solution that ensures permanent traceability. The KINMARK Deep Laser Marking Machine meets this need with ≥0.2mm marking depth, easy robot integration, and optional vision and quality inspection systems. By understanding the technical capabilities and applications, manufacturers can implement effective traceability for high strength steel components in automotive mass production.
If you're interested in any of the equipment mentioned in this article, feel free to contact our sales engineers for detailed product information and customized technical solutions.