GB/T 38642-2020 in English

This standard establishes a risk assessment framework covering the entire life cycle of industrial robots, including transportation, installation and commissioning, operation and maintenance, and adopts a three-step iterative method to achieve risk control:

1. Intrinsically safe design measures
2. Configuration of safety protection devices
3. Use information warning

Definition of key terms

The 8-step assessment procedure specified in Chapter 5 of the standard:

1. Determine the evaluation object (robot body/AGV)
2. Establish a cross-disciplinary assessment team
3. Collect technical parameters and usage scenarios
4. Divide life cycle stages and hazardous areas
5. Use risk graph method (SFOA) for assessment
6. Prepare a risk assessment report
7. Implement risk reduction measures
8. Verify residual risk

Appendix A/B lists in detail the 137 hazards, which are mainly distributed in:

• Mechanical hazards (accounting for 62%): extrusion, shearing, collision
• Electrical hazards (18%): electric shock, short circuit
• Thermal hazards (12%): scalds, fire
• Human factors (8%): misoperation, insufficient training

Examples of special risk scenarios:
The collision risk of AGV in the blind spot of turning (Appendix B-36 items) requires additional protection by laser scanners.

The main improvements of this standard compared with GB/T15706-2012:

1. Establish a robot safety file and record the risk assessment results at each stage
2. Conduct a dynamic risk assessment on the AGV navigation path
3. Regularly verify the PLr level of the safety control system
4. Formulate enterprise implementation rules in combination with the case in Appendix C

Note:System integration risks need to be evaluated separately with reference to GB11291.2.