Cnc Machine Operator

Role & responsibilities

1. CNC Machine Operation

• Operate CNC roll-turning and machining equipment safely and efficiently as per approved operating procedures.
• Carry out roll turning, dressing, grooving, machining and finishing operations as per approved roll pass drawings and machining instructions.
• Select appropriate CNC programs, tools, inserts and machining parameters according to roll material and profile requirements.

2. Roll Pass Machining

• Perform accurate machining of roll passes, grooves, collars, radii and other required profiles.
• Ensure correct pass dimensions, groove depth, roll diameter and profile geometry as per drawing/pass schedule.
• Maintain required surface finish and dimensional accuracy.

3. Roll Inspection

• Inspect rolls before and after CNC machining for:

Roll diameter

Groove dimensions

Pass profile

Collar dimensions

Radius

Surface condition

Cracks/chipping and other abnormalities

• Use vernier caliper, micrometer, profile gauges and other measuring instruments correctly.

4. Roll Dressing & Reconditioning

• Carry out scheduled roll dressing/reconditioning to restore required pass geometry.
• Ensure proper removal of worn, damaged or cracked portions before machining.
• Follow defined roll-dressing frequency and tonnage-based maintenance requirements.

5. CNC Program & Parameter Control

• Use approved CNC programs and ensure correct program selection for each roll/pass.
• Verify tool offsets, work offsets, zero setting and machine parameters before starting machining.
• Report any abnormality in CNC program, machine movement or machining parameters to the supervisor.

6. Dimensional Accuracy & Quality

• Ensure machining is carried out within specified dimensional tolerances.
• Verify critical pass dimensions at appropriate stages of machining.
• Prevent over-machining and maintain maximum possible roll/pass life.
• Ensure proper identification and traceability of each roll after machining.

7. Machine Maintenance

• Carry out routine inspection of CNC machine, lubrication system, hydraulic system, coolant system, chuck/fixtures and other accessories.
• Check machine condition before starting the shift.
• Immediately report abnormal vibration, noise, temperature, leakage, spindle/tool issues or CNC alarms.
• Maintain basic operator-level preventive maintenance activities.

8. Tool & Consumable Management

• Ensure proper selection and handling of cutting tools, inserts, holders and measuring instruments.
• Monitor tool wear and replace tools at appropriate intervals.
• Maintain minimum required stock of critical CNC tools and consumables.

9. Safety

• Follow all SPM safety procedures, PPE, LOTO and machine guarding requirements.
• Ensure proper clamping and securing of rolls before machining.
• Never enter the machining zone while the machine is running.
• Maintain safe handling practices for heavy rolls using EOT crane/Hydra/Farana as applicable.
• Report unsafe conditions, near misses and equipment abnormalities immediately.

10. Roll Identification & Traceability

• Verify roll identification, grade, serial number and machining requirement before starting work.
• Maintain proper records of roll diameter before/after machining.
• Record machining details, pass number, tonnage, dressing quantity and final dimensions.
• Ensure proper marking and storage of completed rolls.

11. Coordination with Roll Shop & Mill

• Coordinate with Roll Shop, Guide Shop and SPM Operations for timely availability of rolls.
• Prioritize roll machining according to the rolling schedule and upcoming section changes.
• Ensure emergency roll dressing/machining requirements are attended promptly to minimize mill downtime.

12. Troubleshooting

• Identify machining abnormalities such as chatter, vibration, poor surface finish, dimensional deviation, tool breakage and incorrect profile.
• Take immediate corrective action within the defined operating procedure.
• Escalate major machine or quality issues to the CNC Supervisor/Shift In-Charge.

13. 5S & Housekeeping

• Maintain excellent housekeeping around the CNC machine and work area.
• Ensure proper collection and disposal of chips, coolant and machining waste.
• Keep tools, gauges and fixtures properly identified and stored.
• Follow 5S standards and workplace organization practices.

14. Continuous Improvement

• Participate in TPM, 5S, Kaizen and productivity-improvement initiatives.
• Suggest improvements in machining cycle time, tool life, roll utilization and pass life.
• Support reduction of CNC machining time and improvement of roll-shop productivity.

Required Competencies

1. Temp. above 30C .

2. Proximity to Heat, Noise & Temperature.