Technical index and published papers
 

General matters

 
Article Title Issue
Interviewed report (about the high value press stamping) Press working magazine 2002 vol.40 No.11
Press forming with additional value Press working magazine 2007 vol.45 No.1
Means of the high value production Press working magazine 1995 vol.33 No.12
Means of technology Press working magazine 1995 vol.33 No.12
Transplant of technique. (to complement) -
Die designer's conditions. (as a pro.) -
The cost and period for development. Press working magazine 1995 vol.33 No.12
The contents of costs -
Processing flow of die making and press stamping. -
Enforcement plan and progress for important project.
(a form of check sheet)
Press working magazine 1995 vol.33 No.12
Tools and dies technique materials -
A repair history form of stamping die. -
Others -
 
About product design  
Needed accuracy and its datum. -
A blank size for a completion size of the product. -
Load force to the assembled part. -
Burr side or die-roll side of the stamped product. -
The example of improvement of a product. (A subject and reply) -
Others -
 
Blanking and shearing  
The factor which the burr appears at the sheared edge. The appearance of the burr changes with shearing shape.
Die-roll is caused by shearing.
Presumption of sheared surface's length
Evolution of half blanking.
Gear blanking which almost has neither slight burr nor a die-break. (1/3-3/3)
Sheared surface can be controlled. (1-2-3)
How to cut narrow web precisely.
The accuracy changes by cutting narrow web.
Shaving-cut to produce smooth vertical surface.(1/2-2/2)
How to shave-cut for the product which has narrow web.
How to get smooth surface throughout the entire part of all thickness and perimeter by shaving-cut in the progressive die.(1)-(2)
The method of pushing-back.
Eriminating slug pulling during piercing operations
 
Drawing (1)  
The order of the calculation for designing deep drawing-die.(1/4-4/4) Press working magazine 2000 vol.38 No.6
The formula for calculating the volume of the corner R section
About double ring lanced blank and dog bone-style pierced blank Press working magazine 1997 vol.35 No.10
Design for double ring lanced blank. (1/2 , 2/2)
How to prevent from occurring burrs like a whisker on lancing stage.
How to prevent from occurring burrs like a whisker on lancing stage.
The positioning method for deep drawing of the 2nd and after the 2nd.
Cross-sectional structure for the redraw block of a progressive die. (1/2 , 2/2)
Wall thickness reduction of deep drawn parts.
Notes of reducing wall thickness in deep drawing process.
Deep drawing by the larger gap than wall thickness.
Deep drawn samples. (sleeves, pipes) Press working magazine 1993 vol.31 No.6
The processing order for the parts of deep drawing with a flange.
Design for deep drawn parts with walls of different diameter
The way of pushing for very small deep drawn parts. (1/2-2/2)
Die design for deep drawn parts with square or rectangle section.
Prevent denting of deep drawn parts with rectangle section.
Prevent wrinkling formation of deep drawn parts with rectangle section.
flange forming of deep drawn parts with rectangle section.
Length crack of sidewall terminal of deep drawn parts with rectangle section
breaking of body of deep drawn parts without circular section
Deep drawn samples with different wall thickness.
(case, housing)
Press working magazine 1993 vol.31 No.6
Die design for deep drawn parts with different wall thickness. Press working magazine 1993 vol.34 No.6
A sample of taper-drawn part. (guide part of knock pencils) Press working magazine 1993 vol.31 No.6
The examples of wall edge processing of deep drawn part. Press working magazine 1993 vol.31 No.6
How to make the corner radius of deep drawn parts small.
Wall edge patterns for deep drawn parts without a flange.
(1/3-3/3)
Horizontal cam trimming die for cutting drawn wall edge.
(1/7-7/7)
Press working magazine 1996 vol.34 No.12
Cam trimming of deep drawn parts without circular section
Proposal of new method of process design This technique need to manufacture of high precision deep drawn parts.
the method of deep drawn when the material is thick This technique need to manufacture of high precision deep drawn parts.
Judgment of contact angle of drawing die radius and the work This technique need to manufacture of high precision deep drawn parts.
 
Drawing (2)
Shock line which is generated flange forming of deep drawn parts.
The earring in Deep Drawing (1/2-2/2)
Causes of flange wrinkling.
Prevent the level gap caused at the portion of the deep drawing punch R.
Bottom defects of the cup happen by the unsuitable punch R.
Prevention of remainder near the cup flange.
Prevent burrs like a whisker near the cup flange.
Faults which occur on cup when previous process is too deep.
The break of deep drawn cup wall.
A wall crack of hard material.
Prevention of sink-mark which occurred inside surface of burring part. (after drawing)
 
Burring
Prevention of breaking the edge when it is burring processes
Dimensions of tool when it is the after burring process
Shrink of the edge when it is burring process
Prevention of breaking slight burring punch
 
Casting  
Point of technique and foresight for cold press by material Press working magazine 2006 vol.44 No.1
A basic knowledge of the press working 1
A basic knowledge of the press working 2
Distortion resistance and temperature
Permissible pressure of material
The way to make sharp edge when it is step-forming Press working magazine 1996 vol.34 No.9
Spread of side wall according to uncontrolled compression Press working magazine 1996 vol.34 No.9
Creation of vertical wall by press Press working magazine 1996 vol.34 No.9
Material's flow and problems where protruding parts of cold press Press working magazine 1996 vol.34 No.9
Condition of increase thickness for seat metal forging
Prevention of uneven thickness when the impact forming
Method of increase thickness for seat metal 1
Method of increase thickness for seat metal 2
Method of increase thickness for seat metal 3
Development of miniaturization for the needs of the time but with the frictional force increasing
Case of carrier which progressive die forming
Example of press parts process setup
Example of extrusion press for soft material
Others
 
Completion and assembling
In-die complex Processing in Press stamping (1/9-9/9) Press working magazine 1998 vol.36 No.11, 2002 vol.40 No.12
lamination technology for press working Press working magazine 1997 vol.35 No.10
others
 
Die mechanics
A roll of stripping plate for bend process                
Bending die with cam which has function of angle adjustment Press working magazine 1997 vol.35 No.10
Prevention of pilot pin gap
Method of pilot for thin material
Structure of slide cam (1/2-2/2) Press working magazine 1997 vol.35 No.10
Structure of cam which sets in stripper
Structure of cam which drawing a side body
Method of side wall processing
Barrel processing for stamped parts in extremely-thin materials
Estimate for dead point speed of crank press
Lubricant
Others

 

 

Contact details:
Advanced Press Technology
Seijiro Oshima - President
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JAPAN
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