Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 251 - 300 out of 2,094

Document Document Title
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...  
JP4337504B2  
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...  
JP4301133B2  
JP4279350B1
The plug for punching rolling is Fe by carrying out electric arc spraying of the iron wire rod which makes Fe the main ingredients on the surface of base metal. 3 O 4 Since the tunic which consists of an oxide and Fe (s) (metal), such as...  
JP2009125784A
To provide a hump capable of reducing an undulation formed on the outside surface of a product by changing the chamfered shape of the rear end part of a roll for an Assel mill.In a roll for an Assel mill, a hump of the roll prevents gene...  
JP4276480B2  
JP4259347B2  
JP2009082988A
To provide a pierced tube shell of an austenitic stainless steel having a good inner surface condition and to establish a means with which can perform mass production on an industrial scale of a good quality seamless steel pipe of stainl...  
JP4255991B2  
JP2009066644A
To provide a piercer boring method of a hard-to-work material capable of preventing generation of inner flaw when performing the piercer boring of the hard-to-work material.In the piercer boring method for manufacturing a seamless steel ...  
JP4238744B2  
JP4231631B2  
JP2009018338A
To provide a pusher device with which thickness deviation in the top part of a tube stock manufactured by pusher piercing is suppressed.The pusher device 4 is provided with a cylinder device 30 and a pusher mandrel 34. The cylinder devic...  
JP4200829B2  
JP4196991B2  
JP2008543569A
The present invention with 2 roll inclination rolling mill equipped with the punching mandrel currently held between the rolls inclined while having and carrying out one rolling part and at least one reeling part, With 3 roll inclination...  
JP4169858B2  
JP4155267B2  
JP2008214713A
To provide a billet which suppresses the generation of an intermetallic compound entailing the deterioration of toughness and corrosion resistance and a seamless steel tube using the billet.There are provided the billet for the seamless ...  
JP4150585B2  
JP4145764B2  
JP2008531286A
The present invention is a method for supervising the processing process for manufacturing a hot-working pipe, and relates to that by which a hollow matter pipe is manufactured with an inclination boring machine using the internal tool c...  
JP4133103B2  
JP4126979B2  
JP2008161912A
To provide a method of manufacturing seamless steel tubes by which the deterioration of surface roughening is deterred without damaging the biting property of barrel-shaped rolling rolls.This method of manufacturing the seamless tubes is...  
JP2008161906A
To provide a method for producing a seamless steel pipe made of a high Cr-high Ni-based alloy in which the generation of melted inside rash is prevented, and also, the service life of a plug can be improved.When the stock to be rolled ma...  
JP2008161900A
To provide a method of manufacturing a medium-diameter seamless steel pipe by which occurrence of eccentric uneven-thickness defect is detected on the spot during the piercer rolling of the same pipe-making lot in which the thickness of ...  
JP4117955B2  
JP4107199B2  
JP2008137026A
To provide a barreled rolling roll for inclined rolling mill and a method for manufacturing a seamless steel pipe, capable of relaxing the generation of a flaw caused by a knurling.The barreled rolling roll provided with the ball head re...  
JP4103082B2  
JP2008126255A
To provide the technique of manufacturing a seamless tube excellent in quality at high productivity.Piercing and rolling are performed by using a piercing mill provided with inclined rolls under conditions that the reduction ratio TDFT a...  
JP4094462B2  
JP2008062294A
To provide a monitoring apparatus etc. of manufacturing conditions for seamless pipes which enables quick correction of manufacturing conditions during operation of seamless pipe manufacturing equipment.The manufacturing condition monito...  
JP4059099B2  
JP4051918B2  
JP4045813B2  
JP2007537874A
It is equipment for reduction of a path of the pipe by rolling, or the tubular material 7, circular-izing, or straight-line-izing, Are the roller 3 with cylindrical plurality of a long and thin parallel cylindrical array which vacates re...  
JP2007290020A
To provide a method of manufacturing a medium diameter seamless pipe by which eccentric uneven thickness of the rolled stock succeeding to a detected rolled stock is reduced by detecting the generation of the eccentric uneven thickness o...  
JP4000738B2  
JP2007260685A
To provide a piercer plug and a piercing and rolling method by which the life of the piercer plug is lengthened and also the occurrence of slip or miss roll during piercing and rolling is prevented. In this piercer plug 3, the coefficien...  

Matches 251 - 300 out of 2,094