Common Problems and Solutions in Thread Processing

Common Problems and Solutions in Thread Processing

• Admin
• 2024/2/16

What are the common problems in thread processing? What are the solutions to these problems? Let's look together.

Build-up Tumor

Cause:

• Medium to low cutting speed.
• Processing of low carbon steel or stainless steel materials.

Solution:

• Continue to reduce or increase the cutting speed.
• Adjustable treatment of mild steel, choose blades with good toughness, inserts with PCD coating are better.

Flank Wear is Too Fast

Cause:

• Cutting speed is too high.
• The cutting depth of the horizontal feed is too shallow.
• The tip of the tool is too much above the center line of the workpiece.

Solution:

• Reduce cutting speed.
• Reduce the number of feeds.
• Adjust the height of the installed insert.

Uneven Wear of Left and Right Cutting Edges

Cause:

• The inclination of the insert edge is inconsistent with the helix angle of the thread.
• The lateral feed method is incorrect

Solution:

• Replace the appropriate shim to obtain the correct blade inclination.
• Adopting improved side feed method

Chop/ Breakage

Cause:

• Cutting speed is too slow.
• Excessive cutting force.
• Poor chip control and entanglement.
• The tool tip installation height deviation is large.

Solution:

• Increase cutting speed.
• Increase the number of feeds and reduce the maximum feed.
• Choose a suitable feed method, increase the pressure of the cutting fluid, and blow away the chips.
• Adjust the installation height of the tool.

Tool Ductile Deformation

Cause:

• The cutting speed is too high and the cutting temperature is too high.
• Insufficient supply of cutting fluid.

Solution:

• Reduce cutting speed.
•  Increase the supply of pre-cutting fluid, and aim at the processing area for cooling.

Poor Thread Surface Quality

Cause:

• Cutting speed is too low.
• The tip of the tool is located above the center height.
• Poor chip control

Solution:

•  Increase cutting speed.
• Adjust the height of the tool center.
•  Change the appropriate feed method.

Incorrect Thread Profile (Too Flat Profile)

Cause:

• The height error of the tool installation center is too large.
• Tool wear or damage.

Solution:

• Tool wear or damage.
• Change the tool or change the cutting edge.

Vibration

Cause:

• Incorrect clamping of workpiece or tool.
• Improper selection of cutting parameters.

Solution:

• Adjust the clamping state of the workpiece or tool.
• Adjust cutting parameters. If increase or decrease the cutting speed, use constant cutting depth in feed processing.
• Adjust the installation height of the tool.

Hope these methods can be helpful to you!

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