Marble inspection platforms are widely used as precision measuring bases in mechanical manufacturing, laboratories, and industrial quality control. To ensure accuracy, stability, and durability, these platforms must meet strict material, design, and performance standards.
Key Features and Requirements of Inspection Platforms
1. Material and Hardness
Inspection platforms are typically made from high-strength cast iron (HT200–300), gray iron, or alloy materials such as QT400–600 and ZG15–45.
Working surface hardness: HB170–300
Heat treatment: Two artificial aging treatments (600–700°C annealing) or natural aging for 2–3 years
This process ensures stable accuracy, excellent wear resistance, and long-term durability.
2. Types of Inspection Platforms
Inspection platforms can be manufactured in various forms depending on customer requirements, including:
Cast iron inspection plates
Aluminum profile platforms
Fan inspection platforms
Fire door inspection platforms
Dynamometer inspection platforms
Motor assembly platforms
Both standard sizes and customized solutions are available to meet specific industrial needs.
3. Applications
Inspection platforms are classified into three categories according to their use:
Reference grade (for laboratory use)
Master grade (for calibration purposes)
Working grade (for workshop applications)
They are used for precision measurement, machine tool calibration, accuracy testing, part inspection, precision marking, welding, and assembly work. In modern manufacturing, inspection platforms are indispensable tools for ensuring product quality.
4. Accuracy Grades
Inspection platforms are manufactured according to four accuracy grades: 0, 1, 2, and 3. Flatness inspection is performed using the coloring method:
Grade 0 & 1: At least 25 contact points per 25×25 mm² area
Grade 2: At least 20 points
Grade 3: At least 12 points
The number of contact points directly affects stability, accuracy, and wear resistance. Scraping depth typically ranges from 9–37 μm, with 20 μm being considered optimal.
5. Load-Bearing and Installation Design
Designed according to customer-specified load capacity (N tons)
Equipped with leveling pads or support stands for easy adjustment
Even distribution of supporting points to ensure long-term stability
Complete installation drawings provided, including layout diagrams, foundation drawings, and support details
It is recommended that the workpiece weight does not exceed the rated load, in order to prevent deformation or reduced measurement accuracy. For heavy-duty applications, customized reinforced platforms can be designed.
6. Manufacturing and Acceptance Standards
Production and inspection comply with the following national standards:
GB/T 22095-2008 – Cast Iron Surface Plate Standard
JJG117-2005 – Calibration and Inspection Standard
7. Documentation and Delivery
Each inspection platform is delivered with complete technical documents, including:
User manual (covering packaging, lifting, installation, operation, and maintenance)
Installation drawings
Packing list
Product qualification certificate
Calibration certificate
Factory inspection report
Conclusion
Marble and cast iron inspection platforms are precision tools designed to meet the strictest requirements of industrial measurement and quality control. By using high-strength materials, advanced manufacturing processes, and adhering to international standards, these platforms ensure long-term accuracy, stability, and reliability. Whether used in laboratories, workshops, or large-scale manufacturing plants, inspection platforms remain an essential foundation for precision measurement and quality assurance.