Cause
|
Solution
|
Dayton Products & Services
|
High impact or compressive failure |
Change punch materials |
Dayton Versatile M2 & PS4, Ball Lock PS4, or TuffPunch® PS4 |
Change to a larger body diameter punch |
|
Change from a Jektole® to solid punch |
|
Use guide bushings |
Dayton Versatile product line |
Misalignment resulting in lateral forces |
Check for worn guide pins & bushings—replace, if necessary |
|
Check for loose gibs in the ram of the press |
|
Check overall die alignment |
|
Part material movement |
Use gas or spring-guided stripper |
Dayton MaxLife® Die Springs |
Use a retainer or punch-mounted stripper |
Dayton DAYStrip® or SMARTStrip™ Urethane Strippers |
Poor material control |
Review die, press, & feeder setup |
|
Excessive stripping force |
Increase punch-to-die button clearance |
Dayton clearance testing service |
Reduce punch-to-die entry |
|
Coatings to add lubricity |
Dayton coatings |
Back taper on punch point "B" |
|
Polish punch point |
Dayton VersaPlus® products |
Punch point hardness too low |
Verify hardness is minimum of 60 RC |
Request technical assistance from Dayton to insure proper RC hardness |
Punch point "B" too long |
Reduce point length "B", if possible |
Contact Dayton Regional Manager |
Improper punch material selected |
Change punch material |
Dayton Versatile M2 & PS4, Ball Lock PS4, or TuffPunch® PS4—use technical assistance request form |
Sharpening damage |
Use flood coolant and proper sharpening techniques |
|
Use correct speed & feed for grinding wheel—correct grinding wheel for steel type |
|
Regrind burr |
Remove regrind burr—break sharp corners on punch face |
|
Tight die clearance |
Increase clearance |
Dayton clearance testing service |
Change punch material |
Dayton Versatile PS or PS4, Ball Lock PS4, TuffPunch® PS4, or VersaPlus® punch |
Coatings/surface treatments |
Dayton coatings |
Use guided stripper |
|
Sharp corners on shaped punches |
Increase clearance in the corners of die button |
Dayton "L" or "K" punch |
Flat punch face |
Use shear angles |
Dayton XS20 or XS21 on round & shaped punches |
Engineered edge break |
|
Improper heat treatment |
Check catalog RC specification |
Use technical assistance request form for metallurgical heat treat check |
Triple tempered for high-speed tool steels |
Dayton's in-house heat treatment monitored by staff metallurgist |
Cryogenics |
Dayton's in-house heat treatment monitored by staff metallurgist |
Punch RC wrong for application |
Lower RC hardness |
Contact Dayton Regional Manager |
Improper punch stagger |
Stagger should be less than the burnish length of the part material |
Contact Dayton Regional Manager |
Cut-off operation & large point punches first to enter |
|
Improper finish on punch point and/or punch face |
Insure there are no harsh grinding or turn marks on the punch point and/or punch face |
Contact Dayton Regional Manager |
Grinding burn on punch point |
Purchase punches from ISO certified source |
|
Part material above 85,000 PSI |
Change punch material |
Dayton Versatile PS4, Ball Lock PS4, or TuffPunch® PS4 |