ISO 8062-3 is a standard developed by the International Organization for Standardization (ISO) that pertains to the dimensional and geometrical tolerances of castings.
It specifically addresses castings produced by various casting methods, such as sand casting, investment casting, and die casting.
Here’s a detailed guide on how to use ISO 8062-3:
1. Clearly understand the design and functional requirements of the casting. This includes dimensions, shapes, and any specific geometric features.
2. Acquire a copy of ISO 8062-3 from the International Organization for Standardization (ISO) or an authorized distributor.
3. Determine the appropriate tolerance grade (CT1 to CT14) based on the order requirement, material group and precision required for the casting. Consider the function and fit of the casting within the overall product.
4. Specify the casting dimensions in accordance with ISO 8062-3. Remember to divide by 2 for linear tolerances. Use the terminology and guidelines provided in the standard to describe linear dimensions, angles, and other geometric features.
5. Consider the surface finish requirements and specify permissible variations in surface roughness as outlined in the standard.
6. Plan the inspection process based on the specified tolerance grade and casting dimensions. Some castings have a separate control plan (CP) to ensure the minimum wall thickness at designated areas.This may involve visual inspection, measurements using appropriate tools, and compliance checks with CT grades.
7. Carry out inspections using the designated methods outlined in ISO 8062-3. This may include measuring tools, gauges, and visual checks to ensure the castings meet the specified tolerances. Ultrasonic gauges are not uncommon for casting minimum wall thickness verification.
8. Record the inspection results, indicating whether the castings conform to the specified tolerances or if any deviations are observed.
9. Communicate the inspection results to relevant stakeholders, including manufacturers, suppliers, and customers. Clearly articulate any non-conformities and discuss potential corrective actions if needed.
10. Use the information gathered from the inspection process to identify opportunities for improvement in the casting process. This may involve refining manufacturing methods, adjusting tolerances, or enhancing inspection procedures.
This standard serves as a valuable reference for achieving precision and reliability in the production of cast components.
Anything you want to know more, send me a direct message or email or whichever mode you prefer.
Cheers 🥂 MFR