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TECHNICAL GUIDE

PUNCHING TOOLS

vol.2 LIFE COUNTERMEASURE FOR TOOLING

TECHNICAL GUIDE

PUNCHING TOOLS

vol.2 LIFE COUNTERMEASURE FOR TOOLING

In punching process with a NC turret punch press, tool life has a major effect on productivity and cost.
This chapter has summarized some measures including Super Dry Punch, as measures for the tool life.

Super Dry Punch (SDP)

  • Super Dry Punch (SDP) supports 【Dry Processing】 without using press processing oil.
    It exerts outstanding effects on difficult-to-process materials such as stainless steel.
  • Excellent durability is achieved by the double effect of the "super hard coating (Hv 2,500~3,000)" on the surface and the "penetration layer" to the punch base material.
    Eliminated the "film peeling" defect that occurs when stainless steel is processed with conventional coating punches such as TiN (gold) and TiCN (gray purple).
Conventional coating
Conventional coating
Super Dry Punch (SDP)
Super Dry Punch (SDP)
  • Durability test results of Super Dry Punch and TiCN coating
Surface Treatment TiCN Coating Super Dry Punch (SDP)
Material & Thickness SUS 304 t = 2.0 SUS 304 t = 2.0
Working Oil Not in use (Non-oil Process) Not in use (Non-oil Process)
The number of hits About 20,000 hits About 82,000 hits

SURFACE TREATMENT VARIATION (APPROPRIATE)

Total
performance
Punch type Appropriate Material Characteristics
Stainless steel Mild steel Aluminum Galvanized
High
Performance↑↓Cost
Performance
Super Dry Punch
(SDP)
★★★★★★ ★★★★★★ ★★★ ★★★ Highly effective in SUS material
Heavy Duty Punch
(HDP)
★★★★★ ★★★★★★ ★★★★★★ ★★★★★★ Excellent heat resistance
Conic Long Life Punch
(CLP)
★★★★ ★★★★★ ★★★★★★ ★★★★★★ Emphasizing balance and Long life
Conic Hard Punch
(CHP)
★★★ ★★★★ ★★★★★  ★★★★ High Cost Performance
M2…
No surface treatment
★★ ★★★ ★★★ ★★★
D2…
No surface treatment
★★

SLITTING (NIBBLING) PROCESSING

Heel tool

A tool that equipped with fixed heel part to punch and the heel part enters the die before the punch strikes the material,
prevents deviation of the punch during removal.
※ There is a limit on slitting direction.

Heel tool

Sharp Roof tool

In addition to this, there is also a sharp roof tool that has a movable heel part at the cutting edge to reduce restrictions on the slitting direction.

NARROW PUNCH

There is a punch type such as narrow type, open end type, super narrow type etc.
which made it difficult to break by shortening the effective punch length and increasing the strength of the punch.

〔 Standard type 〕

Standard type

〔 Narrow type 〕

Narrow type

〔 Open-end type 〕

Open-end type

〔 Super-narrow type 〕

Super-narrow type

THICK PLATE PROCESSING

BACK TAPER

A tool that provide taper relief on the punch and reduce seizure and contact with the material.

Back taper

OTHER LIFE COUNTERMEASURES

  • 1.Check for misalignment of turret station and wear of turret key etc.
  • 2.Combined use with tools for slug pulling measures.
  • 3.Implementation of early regrinding.
  • 4.Put a small rounding on the corner of Square / Rectangle punch.

As life countermeasures of the tool, it is recommended to select a tool that is acceptable for the processing conditions such as the quality and thickness of material.

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