Records of achievements

Other components

Deformed bar coupler Material (Joining dimension)::S45C×SD345(46)
Application: Building and civil engineering parts
Pre-friction joining method/Problems
New engineering method

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Category
Quality Cost Lightening
 
Purpose and effects
  • Friction joining of reinforcement steel to thread
  • Coupling connection of threads for high-rise building
  • Significant increase of strength owing to mechanical fixing

Pipe support Material (Joining dimension)::SS41×STKM38×STKM38(60×t2/50×t2)
Application: Building and civil engineering parts
Pre-friction joining method/Problems
CO2 arc welding

  • Insufficient welding strength
  • Poor appearance of welding

 
Category
Quality Cost Lightening
   
Purpose and effects
  • Enhanced joint strength
  • Friction joining after plating
  • Enhanced quality of appearance at joint section

Transmission gear shaft Material (Joining dimension):: SCM415 to SCM415(37×t6)
Application: Motor-bicycle and bicycle parts
Pre-friction joining method/Problems

Grinding out from solid forging stock

  • Larger number of boring man-hour

 
Category
Quality Cost Lightening
 
Purpose and effects
  • Dividing, and friction joining of two parts that have been forged in axial direction
  • Changing of internal bore forging (Prepared hole may be forged.)
  • Reduced forging and processing costs

Aluminum hub Material (Joining dimension)::A2017-T6(16)
Application: Motor-bicycle and bicycle parts
Pre-friction joining method/Problems
Grinding out from solid forging stock

  • Larger number of machining man-hour
  • Strength is insufficient because they are cast parts.

 
Category
Quality Cost Lightening
 
Purpose and effects
  • Dividing and changing to cold rolling. Friction joining after turning of the joining face only
  • External finish only with deburring and chamfering on circumference of flange
  • Increased strength

Internal variable speed hub Material (Joining dimension):: S15C to S15C (43×t1.6)
Application: Motor-bicycle and bicycle parts
Pre-friction joining method/Problems
Grinding out from solid forging stock

  • Larger number of machining man-hour
  • Higher material cost

 
Category
Quality Cost Lightening
   
Purpose and effects
  • Divided and cold rolled. Joining face only is turned and friction joined.
  • Minimized machining
  • Reduced material cost

Handle post Material (Joining dimension)::A7N01×A6063(23×t3.5)
Application: Motor-bicycle and bicycle parts
Pre-friction joining method/Problems

TIG welding

  • Problem of welding defect

 
Category
Quality Cost Lightening
 
Purpose and effects
  • Changing to butt friction joining
  • Welding defect has been eradicated.

Drive shaft Material (Joining dimension)::SCM422×SUS630×SUS630×SUS630(35/28/28)
Application: Outboard engine parts
Pre-friction joining method/Problems
Flash butt welding

  • Problem of joining defect (Rejected by magnetic inspection)
  • Poor bending accuracy

 
Category
Quality Cost Lightening
   
Purpose and effects
  • Edge preparation is not necessary.
  • No joining defect problem
  • Enhanced bending accuracy

Crank shaft Material (Joining dimension)::S48C to C48C(42)
Application: General purpose engine parts
Pre-friction joining method/Problems
Grinding out from solid forging stock

  • Larger number of machining man-hour
  • Many kinds of forging die
  • Higher forging cost

 
Category
Quality Cost Lightening
   
Purpose and effects
  • Dividing and adaptation to mass production by forging common sections
  • Reduced number of dies in stock by making forging dies sharable
  • Reduced forging cost
  • Reduced cutting allowance

Bushing rod Material (Joining dimension)::SCM421×STKM55×SCM421(12.5×t2)
?Application: General purpose engine parts
Pre-friction joining method/Problems

Grinding out from solid round bar

  • Heavier weight

 
Category
Quality Cost Lightening
 
Purpose and effects
  • Employment of pipe at the center by dividing to 3 sections (Weight reduction)
  • Changing to cold rolling of parts at both ends (Reduced machining cost)

Gate ball stick head Material (Joining dimension):: TB35×A6063×A6063×
A6063×TB35(50×t3)
Application: Sporting goods parts
Pre-friction joining method/Problems

Fitting bonding

  • Problem of peeling at joining section

 
Category
Quality Cost Lightening
   
Purpose and effects
  • No problem of joining defect

Iron golf club head Material (Joining dimension)::S25C to S25C (13.6)
Application: Sporting goods parts
Pre-friction joining method/Problems

Slid forging item

  • Many kinds of forging die due to many loft angles

 
Category
Quality Cost Lightening
   
Purpose and effects
  • Dividing and adaptation to mass production by forging common sections

Drill pipe Material (Joining dimension)::AISI4145×AISI1340×AISI4145(130.2×t18)
Application: Oil drilling parts
Pre-friction joining method/Problems
Flash butt welding

  • Unable to use for long items because of poor joining strength.
  • Drilling depth is limited to 2,000 M at the maximum.

 
Category
Quality Cost Lightening
   
Purpose and effects
  • Enhanced joining strength by friction joining
  • Drilling depth can be extended to 12,000 M.