| Die
Breakage
Description
Die cracks through the diamond table and/or carbide ring.
Causes
- Oversize bore diameter.
- Drill contacting diamond during casing operation.
- Thermal stress from excessive temperatures during mounting process.
- Non-uniform stress applied to die during mounting.
- Laser drilling before mounting.
- Excessive mechanical stress in the nib prior to manufacturing operation.
Important
Guidelines for Wire Die End Users
- Follow maximum recommended bore diameter for soft non-ferrous wire. Hard ferrous
wire should not exceed 65 % of this diameter.
- Recut or repolish die on observation of wear ring in area of wire contact
to maximize die life.
- Filter lubricant to remove metal fines to maximize lubricant flow, wire finish
and die life.
- Decrease bearing length for higher speed drawing.
- Use finer grain die blanks for improved wire surface finish and in drawing
ferrous and plated wires.
- Use coarser grain die blanks for drawing larger size nonferrous wire to provide
longer die life and improved wire dimensional control.
- In high temperature drawing of tungsten and molybdenum wire maintain reducing
atmosphere in drawing zone to minimize detrimental oxidation effects and maximize
die life.
- Use matched elongation die sets in multi-wire drawing machines
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Important
Guidelines for Material Returns
- Customer
Service must issue a VOC case number before the product
is returned to Diamond Innovations.
- A
VOC case number is required on the outside of the receptacle which the product
is being returned in.
- If
the product is mounted in a steel casing, the customer must identify the product
type (i.e. 5025TS) on the outside of the steel with a permanent marker.
- Please
provide some background information if possible, i.e. where did the die blank
fail, during the mounting operation, polishing/drilling or during a drawing application.
Please be as specific as possible.
- If
the die blanks failed when the end-user was drawing wire, please provide the type
of material drawn during the application.
- If
the die blanks have been re-bored more than once, please include this information.
- List
the type of flaws or voids which the die blanks were rejected for.
- Include
Diamond Innovations batch and/or lot numbers if available.
- Any
background information, comments and concerns is highly helpful as this allows
us to evaluate our products on a continuing basis.
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