Records of achievements

Cutting and working tools


Drill Material (Joining dimension)::SKH3×S55C(22)
Application: Cutting tool parts
Pre-friction joining method/Problems

Flash butt welding

  • Problem of joining defect
  • Difficult to discover
  • Poor accuracy (Deflection or bend)

 
Category
Quality Cost Lightening
 
Purpose and effects
  • Enhancement of joining quality (No joining defect)
  • Enhancement of joining accuracy (Deflection or bend)
  • No edge preparation is required. (Sawing only OK)

Tap Material (Joining dimension)::SKH51×SCM435(40)
Application: Cutting tool parts
Pre-friction joining method/Problems

Flash butt welding

  • Problem of joining defect
  • Difficult to discover
  • Poor accuracy (Deflection or bend)

 
Category
Quality Cost Lightening
 
Purpose and effects
  • Enhancement of joining quality (No joining defect)
  • Enhancement of joining accuracy (Deflection or bend)
  • No edge preparation is required. (Sawing only OK)

End mill Material (Joining dimension)::SCN435×SCM435(32)
Application: Cutting tool parts
Pre-friction joining method/Problems
Grinding out from solid stock

?Larger number of machining man-hour

 
Category
Quality Cost Lightening
   
Purpose and effects
  • Cost reduction of base material by dividing
  • Reduced machining cost

Wood drill Material (Joining dimension)::SS400×S55C(3)
Application: Cutting tool parts
Pre-friction joining method/Problems

Brazing

  • Problem of breakage from joining section
  • Joining section fitting process

 
Category
Quality Cost Lightening
 
Purpose and effects
  • Enhancement of joining strength
  • Friction joining of finished items
  • Butt joint at joining section

Concrete bit Material (Joining dimension)::SS400×SKS3(21×t3)
Application: Cutting tool parts
Pre-friction joining method/Problems

Grinding out from solid carbon steel stock

  • Quick wear at leading edge (Short lifetime)
  • Higher base material cost of solid SKS stock

 
Category
Quality Cost Lightening
 
Purpose and effects
  • Use of SK stock at leading edge by dividing
  • Enhancement of abrasion resistance (Longer lifetime)
  • Reduction of base material cost

Concrete nail Material (Joining dimension)::SS400×SKH9(8)
Application: Cutting tool parts
Pre-friction joining method/Problems
Grinding out from solid stock

?Larger number of machining man-hour

 
Category
Quality Cost Lightening
   
Purpose and effects
  • Reduction of base material cost by dividing
  • Reduction of machining cost

Drilling bit Material (Joining dimension)::
Cemented carbide?x (Nickel) × Cemented carbide (14)
Application: Cutting tool parts
Pre-friction joining method/Problems

Brazing

  • Problem of breakage caused by cutting heat
  • Fitting of joining section

 
Category
Quality Cost Lightening
   
Purpose and effects
  • Significant increase in joining strength
  • Butt joint at joining section

Power tool bit Material (Joining dimension)::SKH9×S45C(7)
Application: Cutting tool parts
Pre-friction joining method/Problems

Grinding out from solid stock

  • Larger number of machining man-hour
  • Quick wear at leading edge (short lifetime)

 
Category
Quality Cost Lightening
 
Purpose and effects
  • Reduction of machining cost
  • Use of SKH stock at leading edge by dividing
  • Increased abrasion resistance (Long lifetime)

Box wrench Material (Joining dimension)::SCM435×SS400(20)
Application: Working tool parts
Pre-friction joining method/Problems

Solid forging item of SS stock

  • Molding with header of head section
  • Difficult to adapt forging to mass production
  • Problem of wear or deform at ratchet section

 
Category
Quality Cost Lightening
 
Purpose and effects
  • Use of SCM stock for head section by dividing
  • Head section is sharable so it is adaptable to cold forging mass production
  • Increased abrasion resistance (Long lifetime)

Ratchet wrench Material (Joining dimension)::SCM435×SS400(15)
Application: Working tool parts
Pre-friction joining method/Problems
Solid forging item of SS stock

  • Molding with header of head section
  • Difficult to adapt to forging mass production
  • Problem of deform on head section

 
Category
Quality Cost Lightening
 
Purpose and effects
  • Head section is sharable so it is adaptable to cold forging mass production
  • Reduced forging cost
  • Use of SCM stock at head section by dividing

Tool holder Material (Joining dimension)::SCM421×SCM421(42)
Application: Working tool parts
Pre-friction joining method/Problems

Grinding out from solid forging stock

  • Many kinds of forging die are necessary.
  • Larger number of machining man-hour

 
Category
Quality Cost Lightening
   
Purpose and effects
  • Forging of common tapered section only by dividing
  • Forging parts can be adapted to mass production.
  • Reduction of machining cost

Vice spindle Material (Joining dimension)::S45C×SS400(28)
Application: Working tool parts
Pre-friction joining method/Problems

Grinding out from solid stock

  • Higher cost of turning of threaded section

 
Category
Quality Cost Lightening
 
Purpose and effects
  • Cost reduction by converting to turning of threaded section
  • Increased durability of threaded section