Saspi Thread Roller

How do you check if the Emergency Stop is working?

Press the Emergency Stop while the machine is running.

Look for the Plug socket for the machine.

Request a member of maintenance to test the machine.

How do we check for air leaks?

Cover the pipes in lubricating oil and look for signs of bubbles.

Run your hands across the small air pipes around the feed system. Alert maintenance if any leaks are found.

Place your ear close to the pipes and listen for any whistling noises.

What is the main hazard related to the slit and mount process?

The machine tipping over

Water leaking creating slip and trip hazards

Chemicals used in the Mini Lab

Where are the fire extinguishers located?

Generally located next to the main gangway. Fire suppressors are located inside the machine guarding (where applicable).

The Machine does not need a fire extinguisher near by.

Call a fire marshal who will go and retrieve a fire extinguisher.

Where are the emergency stops located on the machine?

Within the First Aid room.

By the production managers office.

Generally located on the machine control panel.

Which types of PPE are required to set / operate a Thread Rolling machine?

Safety glasses, ear defenders, safety shoes (also rubber gloves if required).

Safety shoes, rubber apron, light reflective glasses.

Ear defenders, hard hat, leather boots and gloves

How do you check if the interlocks/ safety guards are working correctly?

Try to keep your hand in the machine with the guard down.

Try to open the machine guard while the machine is running

Try to smash the safety window open.

Once a batch has been completed on thread roll, what should be checked on the machine?

The machine does not need to be check until the next shift.

Stray parts before starting to set the next batch.

Check the amount of parts created in the batch by counting them one by one.

How do you determinate which thread rolling die should be used for the job?

Check for the thread size and form on the stage drawing

Ask the production manager

Pick the cleanest looking die

How can the difference in the die thickness between different regrind dies be compensated?

Use the correct size packing at the back of the die.

Loosen the bolts holding the die

Add layers of tissue under the die

When changing dies, while machine is set for certain diameter, what should be adjusted first: Pressure/ Cutting Depth or Die Alignment (Pitch)?

Pressure / Cutting Depth

Die Alignment (Pitch) should be adjusted first to prevent die damage

Neither

At which part of the die the material is displaced to form the thread; Top, Bottom, Across all length of the die?

Material displacement takes place at the top of the die

Material displacement takes place across the length of the die

Material displacement takes place at the bottom of the die

Why do some dies have Pitch Correction?

To put extra stress on the bolt

To compensate the pitch error when using heat during the rolling process

Years of use warped the die

What is the correct heating coil height setting?

The heating coil should be touching the top rail

Not covering any part of the blank bolt

Groove form or transition form in case of HL parts.

Which document will you refer to for the temperature setting that should be used during the thread rolling process?

Accordingly to the relevant PCP

Ask the Production Manager

You do not need documents the highest setting allowed

Name the parts of the thread presented on the diagram

1. Pitch 2. Thread Angle 3. Root 4. Crest 5. Flank 6.Thread Height / Depth a) Minor Thread Diameter b) Pitch Thread Diameter c) Major Thread Diameter

1. Thread angle 2. Root 3. Pitch 4. Crest 5. Flank 6.Thread Height / Depth a) Minor Thread Diameter b) Major Thread Diameter c) Pitch Thread Diameter

1. Root 2. Thread Angle 3. Pitch 4. Flank 5. Crest 6.Thread Height / Depth a) Major Thread Diameter b) Minor Thread Diameter c) Pitch Thread Diameter

Which other process has a main impact on the thread rolling process?

Cutting / Slicing , Dicing

Grinding / Forging , Grooving

Lifting / Pushing , Pulling

Name the fault presented on the picture and what may cause it.

Die has cracked

It's Arcing and may be caused by worn out coil

The hopper is filled with oil

Click as many faults you think could create what is presented on the picture.

Worn / damaged dies. Die wear or failure (crest of die will collapse or develop fatigue cracks)

Cut setting too far. Excessive pressure.

Insufficient heat.

Oversize blanks.

Incorrect die alignment (pitch)

How do you change a back pusher position on the Saspi machines?

The back pusher is adjusted on the eccentric cam that can be accessed via machine back door.

Only maintenance can change this part of the machine

The bolt found under the hopper unit

What can be a potential cause of the thread rolling on to shank (hitting a form)?

Oil levels to low

Thread speed too low

Grip Length variation

How do you adjust the side pusher horizontal position (how far the side pusher will travel)?

The stroke of the side pusher is fixed, however the position of how far it will travel can be adjusted by moving pusher blade in and out.

Adjust the height of the rail

Change the dies adding extra packing

What is a start up procedure on the machines with the heat?

1. Turn the oil on 2. Start the machine 3. Turn the heating on 4. Let the parts to heat up to the desired temperature 5. Run 30 parts in the Manual mode on Brankamp 6. Switch to Auto mode on the Brankamp

1. Start the machine 2.Turn the oil on 3.run 30 parts in the manual mode on Brankamp 4. Turn the heating on 5.Let the parts heat up to the desired temperature 6. Switch to Auto mode on Brankamp

1.Start the machine 2.Turn the heating on 3. Hold parts in place for 30 minutes 4. Run the machine with a full batch.

What should be the first thing done at the beginning of the shift?

Start the machine without inspecting it

Have a Coffee

Quality Basics

What is the relationship between Pitch Diameter and Major Thread Diameter? (When size change what will happen with the other one?)

When the Pitch Diameter size increase the Major Thread Diameter size increases

When the Pitch Diameter size increase the Major Thread Diameter size decrease and vice versa.

There is no relationship between them

How to reset force bars on the Brankamp?

Before the new production batch starts press the F1 button when in the Manual mode and then reset force bars using X button. The new force limits can be reset by pressing Input key while on the F1 screen and then using the + or - button.

After the batch is complete use the emergency stop to halt the machine this will also reset the force bars.

During the batch place a different sized blank in the machine.

How to check if guide plates are leveled and properly set up?

Run your finger across the guide plates as fast as you can to try and feel the level

Request a spirit level from the maintenance department.

Use a flat object like slip gauge or ring gauge to check if the guide plates are levelled. Look how the gap between the guide plates is corresponding to the die pockets, and pushers. Check how part is feed in manual mode

What gap should be left between the Top Rail and Part Feed Rail?

Big enough for the part to move freely down the rail but not big enough to allow parts to overlap.

The distance between should be half the length of the part

As minimal as can be, almost touching to restrict the parts movement.

Saspi Thread Roller

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