Operation Procedures of Steel Bar Threading Machine

Steel Bar Threading Machine Pre-Operation Checks

1. Steel Bar Threading Machine Electrical Inspection:
   • Inspect electrical parts for any damage.
   • Ensure the machine body is properly grounded.
2. Power Supply Verification:
   • Confirm that the power supply voltage matches the machine’s working voltage.
   • Ensure the distribution box is located within 3 meters of the motor.
3. Safety Components:
   • Verify that the machine is installed smoothly with complete and reliable safety protection components.

Initial Setup

1. Idle Test:
   • Run the machine without load to test both the forward and reverse functions of the motor.
   • Ensure that the machine and the water pump are functioning correctly.

Preparing Steel Bars

1. Selection:
   • Choose steel bars that exhibit good longitudinal linearity.
   • Ensure the cut end face is perpendicular to the steel bar’s axis. If not, cut and polish the end face before threading.

Loading Steel Bars

1. Teamwork for Lifting:
   • With the assistance of another person, lift the steel bar onto the workbench.
   • Clamp it securely and adjust for concentricity to prevent loosening and potential injuries.

Threading Process

1. Starting the Threading:
   • Begin threading slowly, gradually increasing speed while maintaining a uniform threading speed.
   • Ensure that the thread teeth remain intact to prevent equipment damage.

Handling Semi-Finished Products

1. Lifting:
   • After processing the first thread, use the help of another person to lift it onto the semi-finished material rack.
   • Connect and lock it using the appropriate sleeve, ensuring proper locking and threading quality by observing and feeling for tightness.

Quality Inspection

1. Sampling:
   • Sample threaded connectors under the supervision of a witness and send them to the laboratory for quality inspection.
   • If the laboratory inspection passes, continue processing threaded joints of the same specification.

Troubleshooting

1. Immediate Actions:
   • If the machine operates poorly or the knife gets stuck, stop the machine immediately for inspection and repair.
   • Debris Cleaning: Do not clean debris from the blade while the machine is operating.

Safety Measures

1. Personal Protective Equipment:
   • Operators must wear goggles.
   • Avoid touching rotating parts while wearing gloves.

Post-Processing Care

1. Cleaning and Protection:
   • Clean the processed threaded interface and protect it from rain and corrosion.
   • Ensure the coolant is clean and free of impurities; replace it monthly.
   • Add and replace gear oil in the reducer every three months.

Maintenance

1. Regulatory Compliance:
   • Perform maintenance and repair on the machine according to established regulations.

End of Operation

1. Power Down Procedures:
   • Turn off the power and lock the distribution box.
   • Clean the work area before leaving.

Rebar Threading Machine

Steel Bar Threading Machine Standard Sleeve Geometric Dimension

Specifications	Sleeve Length (mm)	Thread Length (mm)	Thread Number	Pitch (mm)
16	45	22.5	9	2.5
18	55	27.5	11	2.5
20	60	30	12	2.5
22	65	32.5	13	2.5
25	70	35	12	3.0
28	80	40	13	3.0
32	90	45	15	3.0

Minimum Tightening Torque for Straight Thread Joint Installation

Rebar Diameter (mm)	Tightening Torque (N·mm)
≤16	100
18–20	200
22–25	260
28–32	320
36–40	360
50	460