1. Preparation of tooling molds and product debugging. Before debugging, it is necessary to clean up the miscellaneous nails and debris on the machine to prevent material mixing.
2. After passing self-inspection, submit to the inspector for first article confirmation. If the first inspection fails, the mold must be reconfirmed and the equipment adjusted.
3. The operator shall promptly clean up the debugging products and surrounding debris on the machine, and the machine can be started for production only after the inspector confirms the "5S" of the machine. Inspectors and operators shall conduct patrol inspections and self-inspections in accordance with the process inspection specifications.
4. The inspector determines whether it is qualified. If qualified, it is transferred to the next process; if unqualified, it shall be isolated and marked in accordance with the "Unqualified Control Procedure", and the inspector shall organize the unqualified review.
5. Transfer to the next process for processing according to the production flow.

1. Mold preparation: thread rolling dies
2. General measuring tools: micrometer, vernier caliper, thread ring gauge

1. Adjustment of thread rolling die seat

   (1) Place the short thread rolling die ③ in the groove of the thread rolling die seat, cover the thread rolling die pressure block ④ and lock the nut.

   (2) Place the long thread rolling die ② in the groove of the middle core thread rolling die seat, install the thread rolling die pressure block and lock the nut.

   (3) Check whether the two thread rolling dies are at the same height and parallel.

   (4) Rotate the flywheel ⑤ by hand to check whether the feeding time is correct.

   (5) Place the screw blank in front of the pusher piece, press the inching switch to make the screw blank rotate for one circle, then press the inching reverse switch to take out the screw blank and check whether the thread marks are aligned.

   (6) Loosen the nuts ⑥ and ⑩, adjust the crank ⑦ double-ended thread, correct the thread of the screw blank, and confirm to lock the nuts to avoid accidents.

   (7) Check whether the thread part and thread diameter of the screw blank meet the standards. If not, loosen the nut ⑧ and adjust the screws ⑨ and ⒇ for micro-adjustment to make the front and rear gaps of the thread rolling dies reach the required level.

   (8) Confirm to lock the nuts and then normal production can be carried out.

   (9) If replacing screw blanks of other specifications, it is necessary to loosen the nuts ⑧ and ⒄ and adjust the screw ⑨ to move the thread rolling die seat ⒂ back and forth to make the distance between it and the track meet the requirements, then lock the nut ⒅ and other screws and nuts, and then adjust according to the above steps.

2. Adjustment precautions

   (1) The rear crank head ⒆ needs to be greased frequently to avoid damage due to oil loss in the bearing.

   (2) If the long and short thread rolling dies are not at the same height, use a thin iron sheet to pad them up.

   (3) When the gap between the middle core ⑾ and the middle core cover ⑿ is too large, loosen the pin screw ⒁ and adjust the pin ⒃ forward to reduce the gap, then lock the adjusting screw ⒀ to increase the stability of the middle core.

   (4) When replacing the thread rolling dies each time, pay attention to the cleanliness of the thread rolling die seat to avoid affecting the thread rolling quality.

   (5) If the screw blank sticks to the thread rolling die, install a spring sheet under the long nut to pull the screw blank away when it leaves the thread rolling die, or check whether it is caused by the thread rolling die and the blank itself.

   (6) During production, the oil tank and oil cup should be inspected frequently, and engine oil should be added to avoid wear of the middle core due to oil loss.

3. Key points for thread rolling die installation

   (1) The groove where the thread rolling die is placed should be kept clean, without scratches or iron filings.

   (2) If gaskets are used, the surface of the gaskets should be clean, without scratches or iron filings.

   (3) When installing the thread rolling die, attention should be paid not to reverse it up and down.

   (4) When using re-ground thread rolling dies, gaskets should be added to compensate for the worn thickness.

   (5) When testing the machine after the thread rolling die installation is completed, the thread rolling gap should not be adjusted too small. It is advisable to gradually adjust to the optimal gap to avoid damaging the thread rolling die easily.

   (6) During formal production, reduce the rolling pressure as much as possible to improve the service life of the thread rolling die.

After passing the debugging self-inspection, submit to the inspector for first article confirmation, and clean up the upper and lower parts of the machine, the surrounding area, material trays, hoppers and containers, clean up all debugging products, waste nails and other debris, and notify the inspector to confirm whether the machine can be started for production. The machine can be started for production only when self-inspection, first inspection and "5S" all meet the requirements (Note: If an abnormality occurs during the production process of the equipment, first stop the machine, then clean up the machine and the receiving basin, and after confirming that the products in the receiving basin are OK, pour them into the qualified material bucket before adjusting the machine to avoid mixing in defective products).