tube straightening machine operator

Confidential Company

Based on the provided technological instructions, the procedure for the straightener of rolled products and pipes includes the following steps:

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#### 1. **Preparing for work**

- Ensure that the equipment (straightening machines, presses, control systems) is in good working order.

- Check the availability and compliance of personal protective equipment (PPE).

- Read the label on the pipe package: check the steel grade, dimensions, and the presence of a pipe passport (if required).

- Make sure that the pipes have undergone heat treatment and cooled to ambient temperature (straightening hot pipes is prohibited).

#### 2. **Control of incoming pipes**

- Check the curvature of the pipes (deviation from straightness should not exceed permissible values).

- Measure the outer diameter of 2–3 pipes from the package using an MK type micrometer in three sections (at the ends and in the middle).

- Make sure that the pipes have no cracks, flattened heads, or surface defects.

#### 3. **Equipment selection and setup**

- Depending on the type of pipes (round, profile, thin-walled, thick-walled), select the appropriate correct machine or press:

- Cam presses (for example, K107) - for preliminary straightening.

- Hydraulic presses (for example, P418V) - for straightening pipes of various profiles.

- Roller straightening machines (for example, “20-102”, “20-60”) – for preliminary and final straightening.

- Roll straightening machines (for example, " Reika ", VRM-35) - for final straightening.

- Set up equipment:

- Install the appropriate stamps, rollers or rolls.

- Adjust the distance between the supports, the force, and the angle of the rolls.

- Check the cleanliness and serviceability of the rollers (clean with sandpaper if necessary).

#### 4. **Pipe straightening**

- Set the pipe in the machine:

- For pipes with clogged heads - with the clogged end first.

- For stainless steel pipes - with cut off heads.

- On the " Reika " frame - open end forward.

- Make sure that the pipe is laid with the concave part down (for cam presses).

- Perform the edit in one pass. If necessary, re-edit after adjustment.

- Monitor the process using an ammeter (for pipes according to TU 14-3R-197).

#### 5. **Quality control after editing**

- Check:

- Absence of defects (dents, waves, ovality, spirality).

- Compliance of the outer diameter with the requirements of regulatory documents.

- Straightness (curvature) using a straightedge and feeler gauges.

- Measurements should be carried out:

- On the first 2-3 pipes during tuning.

- Periodically on every 10–20 pipes.

- On the last pipe of the party.

#### 6. **Resolving inconsistencies**

- If defects are detected (see tables 4.3.1 and 4.4.2):

- Adjust the force, roll offset, straightening speed.

- Replace or clean the rollers.

- Check and replace the wiring.

- If it is impossible to eliminate the defects, send the pipes for repeated heat treatment or repair.

#### 7. **Documentation and delivery**

- Write in the log:

- Date, shift.

- Pipe sizes, package number.

- Number of straightened pipes.

- Comments on quality.

- Return the label to the package after editing.

- Transfer the pipes to the next operation (cutting, inspection).

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### Safety requirements:

- Use PPE: special clothing, protective glasses, gloves.

- Do not clean the rolls while the equipment is operating.

- Do not touch rotating parts of the equipment.

- Observe the operating rules of the machines (see section 2 of the instructions).

- Use PPE: special clothing, protective glasses, and gloves.r accidents.glasses, and