Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 251 - 300 out of 2,176

Document Document Title
JP4655768B2  
JP4650747B2  
JP4624514B2  
JP4623212B2  
JP4617602B2  
JP4615432B2  
JP4610555B2  
JP4609372B2  
JP4603707B2  
JP4597695B2  
JP4586921B2  
JP4569317B2  
JP2010227999A
To provide a plug which enables flaws on the internal surface of a hollow tube stock formed by piercing/rolling to be prevented, and can be produced without requiring long production time and has the prolonged life.The plug 2 includes: a...  
JP4543684B2  
JP4538917B2  
JPWO2008142803A1
【課題】スキュー角度δを大きくして拡管比 上げても、材料のピーリングの発生を防止 きる継目無管の穿孔圧延方法及び装置を提 する。【解決手段】パスライン周りに...  
JP4517811B2  
JP4513807B2  
JPWO2008126427A1
穿孔機10は、複数の傾斜ロール1と、プラ グ2と、プッシャ4と、ガイドロール6とを 備える。プッシャ4は、少なくとも丸ビレッ ト20が傾斜ロール1に接触してから所...  
JP4506563B2  
JP2010521317A
According to [the present invention relates to a rolling mill provided with a planet type inclination roll rolling mill (20) and another rolling mill which follows the planet type inclination roll rolling mill (20) in the rolling directi...  
JP4487847B2  
JP2010125492A
To provide a piercing rolling method for a billet by which the occurrence of scratches on the inner surface at a distal end part of a seamless steel tube is prevented advantageously. In the piercing rolling method for a billet performing...  
JP2010125493A
To provide a piercing rolling method for a billet by which the occurrence of scratches on the inner surface at a distal end part of a seamless steel tube is prevented advantageously. In the piercing rolling method for a billet performing...  
JP2010125494A
To provide a piercing rolling method for a billet by which scratches on the inner surface at a distal end part of a material to be rolled hardly occurs in piercing rolling a billet (seamless steel tube base stock) by means of a piercer s...  
JP4475429B2
A Ni base alloy pipe stock having a chemical composition comprising, by mass %, C ‰ 0.04%, Si €  
JP4471134B2  
JPWO2008096708A1
所定の形状のプラグ素材を準備し、準備され た前記プラグ素材を1.0vol%以上の酸 素を含む熱処理雰囲気中で950℃以上10 50℃未満の熱処理温度で熱処理し、表...  
JP4462265B2  
JP4453278B2  
JP4453082B2  
JP4449908B2  
JP4438960B2  
JP2010005679A
To provide the top shape of a punch in which the point angle of the punch of a centering punch device in an Assel mill and the point angle of a reproducing plug are taken as within the same range.In a clamping device for clamping the nos...  
JPWO2008020510A1
噛み込み時の非定常域での回転鍛造回数及び 剪断変形を抑制し、中空素管のトップ部の回 転鍛造効果及び/又は剪断変形に起因する内 面疵の発生を防止し、中空素管のトップ...  
JP4371247B2  
JP4359783B2  
JP4356168B2  
JP4352997B2  
JP2009241075A
To provide a manufacturing method for a high-alloy seamless steel pipe, which inhibits fin flaws generated in manufacturing a high-alloy seamless steel pipe by piercing.A high-alloy steel billet heated to a temperature range of 900-1,250...  
JPWO2009122620A
A hole (30) is formed in the central part of the rear end face (20) of a round billet (10). A hole (30) has the predetermined depth from a rear end face (20), and has a plurality of slots (31) on the side. Each slot (31) extends in a dep...  
JPWO2009119245A
It is the method of carrying out punching rolling of the piece of a round bar heated at 1250 ℃ or less by ピアサ which allotted the plug along with the pass line between a pair of inclination rolls by which countering allocation was...  
JP4337504B2  
JPWO2007116821A1
ビレットをプッシャとプラグとの間のパスラ イン上に配置し、ビレットを前進させ複数の 傾斜ロールの間に噛み込ませる。少なくとも 、噛み込まれたビレットがプラグに接触...  
JP4314458B2  
JP4315155B2  
JP4315154B2  
JP4311403B2  
JP4305673B2  
JP4305573B1
A hole (30) is formed in the central part of the back end side (20) of a round billet (10). A hole (30) has the predetermined depth from a back end side (20), and has two or more slots (31) on the side. Each slot (31) extends in the dept...  

Matches 251 - 300 out of 2,176