Records of achievements

Components for hydraulic / pneumatic equipment and piping

Mouthpiece for high-pressure hose Material (Joining dimension):
S35C×STKM13C×S35C(21.8×t3.2)
Application: Components for hydraulic / pneumatic equipment and piping
Pre-friction joining method/Problems
CO2 arc welding

  • Problem of oil leak (Implementation of oil leak test)
  • Spatter removal process is necessary.

 
Category
Quality Cost Lightening
?
Purpose and effects
  • Enhanced air tightness at joining section (No oil leak)
  • Abolition of processes for oil leak inspection and spatter removal
  • Reduced base material cost
  • Increased strength at joining section

Valve stem Material (Joining dimension):C3771??(24)
Application: Components for hydraulic / pneumatic equipment and piping
Pre-friction joining method/Problems

Grinding out from solid round bar

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

 
Category
Quality Cost Lightening
? ?
Purpose and effects
  • Molding of burrs with die (jig)
  • Reduced number of processing man-hour
  • Lower material cost

Steam trap valve body Material (Joining dimension):S25C×SUS420J2×S25C(28×t4.3)
Application: Components for hydraulic / pneumatic equipment and piping
Pre-friction joining method/Problems
Grinding out from solid forging stock

  • Many kinds of forging dies for many kinds of joint section
  • Difficult to machine at the inside of body

 
Category
Quality Cost Lightening
? ?
Purpose and effects
  • Reduced number of forging dies by the use of common forging bodies
  • Expanded adaptability of joint section contours
  • Easier machining such as slanted hole in the body
  • Use of expensive SUS stock for body only

Piping connection Material (Joining dimension):SUS304×SUS304(46)
Application: Components for hydraulic / pneumatic equipment and piping
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
  • Bonding of pipe and flange by dividing
  • Reduced number of processing man-hour
  • Reduced base material cost

Branch joint Material (Joining dimension):SUS304 to SUS304(47×t1)
Application: Components for hydraulic / pneumatic equipment and piping
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
  • Bonding of threaded section and main body by dividing
  • Bonding after thread cutting
  • Reduced number of processing man-hour
  • Reduced base material cost

Gas valve Material (Joining dimension):C3771×C3771(10)
Application: Components for hydraulic / pneumatic equipment and piping
Pre-friction joining method/Problems
External and internal brazing after screwing in

  • Problem of air tightness leakage (Max. 30%)
  • Defective parts of small percent occur even after repeated brazing.

 
Category
Quality Cost Lightening
? ?
Purpose and effects
  • Friction joining of tapered plug
  • Enhanced air tightness at joint section