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How to use a steel straight thread rolling machine

Table of Contents

1. Preparation before processing

1. Connect the power cord and grounding wire as required, and turn on the power supply. The power supply is a three-phase 380V 50Hz AC power supply. To ensure personal safety, please use an automatic switch with a leakage protection function.

2. In the coolant tank, add enough soluble coolant (no oiling coolant)

2. Empty car test run

1. Turn on the power. Check whether the cooling water pump is working properly.

2. Operate the button to check whether the electrical control system is working normally.

3. Adjustment before processing

1. According to the diameter of the steel bar to be processed, replace the thread rolling wheel suitable for the processing diameter.

The relationship between the rolling wheel and the diameter of the processed steel bar is shown in Table 1: The outer diameter of the rolling wheel is φ78.2 φ69.4 φ59 The diameter of the processed steel bar is 16–22 25–32 36–40 The pitch is 2.5 3.0 3.5 2. Replace the rolling wheel At the same time, replace the washer with the appropriate pitch of the thread rolling wheel to ensure the correctness of the pitch. The relationship between the pitch and the thickness of the washer is shown in Table 2: Pitch 2.5 3.0 3.5 Washer 5.17 6.00 6.83 5.00 6.00 7.00 4.83 6.00 7.17 Thickness 6.85 6.00 5.17 7.00 6.00 5.00 7.17 6.00 4.83

3. After the thread rolling wheel is adapted to the machining diameter, insert the tool setting bar that is suitable for the steel bar into the center of the rolling head, and adjust the thread rolling wheel to make it in contact with the tool setting bar, pull out the tool setting bar, tighten the screw, and press ring gear so that it cannot move.

4. For the equipment that fixes the positioning plate, according to the diameter of the steel bar to be processed, replace the positioning plate with the processing diameter and print the processing diameter on the positioning plate. For equipment that can adjust the positioning plate, adjust the scale to the corresponding scale according to the scale of the positioning plate. When the rib stripping knife is worn, it needs to be fine-tuned.

5. According to the specifications of the steel bars to be processed, adjust the position of the rib stripping stroke block to ensure that the rib stripping length reaches the required value.

4. Workpiece clamping

Install the steel bar to be processed on the centering jaw, the extension length should be aligned with the end face of the rolling head stripping blade at the starting position, and then pull the handle to clamp.

5. the operation process

1. Turn on the power supply, open the cooling water valve, and press the forward start button to turn the feed handle to feed in the direction of the workpiece to achieve cutting. When the length of the rib stripping reaches the requirement, the rib stripping knife will automatically open and turn the handle. Continue to feed, you can achieve rolling thread, when the rolling wheel is in contact with the steel bar, you must use force, and make the main shaft rotate once. Axial feed a pitch length, when the feed reaches a certain level, it can realize automatic feeding, until the whole rolling process is completed, it will stop automatically, and press the reverse start button to realize automatic retraction.

2. Turn the feed handle clockwise after automatic knife retraction to return the rolling head to the initial position, and the rib stripping knife automatically resets at this time. Just unload the finished workpiece.

3. Use the ring gauge to check the length of the thread, and if the error is within the range to be qualified; at the same time, use the thread stop gauge to check the size of the thread head.

4. When rolling the reverse wire, first exchange any two positions of the thread rolling wheel in the rolling head; then exchange the position of the travel switch pressure block before and after, and ensure that the stroke remains unchanged.

5. When rolling the reverse wire, press the forward start button, and turn the feed handle to feed in the direction of the workpiece to realize cutting. When the length of the stripping rib reaches the requirement, the stripping knife will automatically open and stop feeding. At this time, press After the stop button stops, press the reverse button, the rolling head rotates in the reverse direction, and the joystick continues to feed, the reverse thread can be rolled. When the rolling wheel is in contact with the steel bar, be sure to use force and make the main shaft rotate once. , the axial feed is a pitch length, when the feed reaches a certain level, the automatic feeding can be realized until the automatic stop after the whole rolling process is completed. Press the forward rotation start button to realize automatic tool retraction.

6. Tool regrinding and replacement

1. The rib stripping knife cuts a certain amount of steel bars, and the blade will become blunt. At this time, the rib stripping knife should be removed, and the front edge surface of the tool should be ground by 0.2-0.3mm. It is strictly forbidden to sharpen the top surface of the blade), and it can be reused after installation.

2. When the edge of the rib stripping knife is broken and cannot be cut normally, it can be replaced with a new blade.

3. After the thread rolling wheel rolls a certain number of thread heads, the tooth shape is damaged due to wear and tear, and when the qualified thread head cannot be rolled out, it should be replaced with a new thread roller in time.

4. When replacing the new thread rolling wheel, the washer for adjusting the pitch must be installed correctly, otherwise it will not work properly.

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