Patents for B21C 45 - Separating mandrels from work or vice versa (68)
01/2015
01/27/2015US8939757 Liquid resin molding system
12/2014
12/09/2014US8904839 Method of and rolling mill for making seamless steel pipe
01/2014
01/08/2014CN203380250U Automatic device used for removing burrs
03/2013
03/27/2013CN202824223U Core shaft detaching and mounting device for lifting type adjustable hot-rolling coiling machine
11/2012
11/28/2012CN102802828A Rolling Process And Relating Longitudinal, Multi-stand Rolling Mill Of Continuous, Restrained Type For Hollow Bodies
11/21/2012CN202539254U Drawing cart for drawing dry type bushing cores
10/2012
10/31/2012CN202506689U Automatic material pushing device for cavetto machine
08/2012
08/15/2012CN101842170B Method for producing a seamless steel pipe and rolling mill for performing the method
05/2012
05/09/2012EP2448686A2 Rolling process and relating longitudinal, multi-stand rolling mill of continuous, restrained type for hollow bodies
10/2011
10/19/2011CN102218456A Pullout device for steel wire drawing die
09/2011
09/28/2011CN101579702B New technique for producing high alloy steel high-end pipe by adopting cross rolling elongation technology
09/21/2011CN102189105A Pearson's hot rolling machine or machine set and operation method thereof
08/2011
08/31/2011CN201950088U 一种残卷处理装置 One kind Fragments processing device
08/31/2011CN101579703B New technique for manufacturing high alloy steel seamless pipe with heavy calibre by adopting pilger mill
07/2011
07/26/2011CA2460064C Manufacture of metal tubes
06/2011
06/15/2011CN101209458B Method for rolling tube by hot-rolled seamless tube restraint core rod continuous rolling mill
05/2011
05/11/2011EP2318159A1 Method for producing a seamless steel pipe and rolling mill for performing the method
03/2011
03/24/2011WO2011000819A3 Rolling process and relating longitudinal, multi-stand rolling mill of continuous, restrained type for hollow bodies
03/23/2011CN101559448B Evacuation device for mandril of perforator
02/2011
02/09/2011CN101653782B Ejector rob trolley provided with rapidly replaced ejector rob
01/2011
01/06/2011WO2011000819A2 Rolling process and relating longitudinal, multi-stand rolling mill of continuous, restrained type for hollow bodies
01/05/2011CN201693019U Die drawing device for steel wire
12/2010
12/01/2010CN101474634B Three-roller tube-rolling machine
09/2010
09/22/2010CN101842170A Method for producing a seamless steel pipe and rolling mill for performing the method
09/08/2010CN201572819U Rod detaching mechanism
08/2010
08/26/2010US20100212387 Method for producing a seamless steel pipe and rolling mill for performing the method
05/2010
05/26/2010CN201482821U Rod uncoupling chain for pre-punching mandrel of tube blank
03/2010
03/11/2010WO2010025790A1 Method for producing a seamless steel pipe and rolling mill for performing the method
01/2010
01/06/2010CN201375993Y Mandril monitoring device
11/2009
11/18/2009CN101579703A New technique for manufacturing high alloy steel seamless pipe with heavy calibre by adopting pilger mill
11/18/2009CN101579702A New technique for producing high alloy steel high-end pipe by adopting cross rolling elongation technology
10/2009
10/21/2009CN101559448A Evacuation device for mandril of perforator
09/2009
09/16/2009CN101534972A Spiral pipe machine
02/2009
02/26/2009WO2007130141A3 Spiral pipe machine
12/2008
12/17/2008EP2001613A2 Spiral pipe machine
07/2008
07/02/2008CN101209458A Method for rolling tube by hot-rolled seamless tube restraint core rod continuous rolling mill
06/2008
06/25/2008CN101204713A Disconnection device for punch refrigerant top
12/2007
12/26/2007EP1427550B1 Manufacture of metal tubes
10/2007
10/17/2007CN200960527Y Sheath breaking clamp for railway car bogie braking beam end axle abrasion sheath
12/2006
12/06/2006CN1287922C Method for manufacturing seamless tubes and seamless tubes manufactured with same
04/2005
04/06/2005EP1427550A4 Manufacture of metal tubes
03/2005
03/01/2005US6860134 Ironing dies
12/2004
12/15/2004CN1555298A Manufacture of metal tubes
10/2004
10/05/2004US6799357 Manufacture of metal tubes
06/2004
06/16/2004EP1427550A1 Manufacture of metal tubes
06/2003
06/19/2003US20030110825 Manufacture of metal tubes
03/2003
03/27/2003WO2003024639A1 Manufacture of metal tubes
07/2002
07/04/2002US20020083755 Ironing dies
01/2000
01/27/2000DE19832503A1 Manufacturing rotation symmetrical molded article with undercuts, slots, cavities or threading on inside, by placing removable splay sleeve inside article and then drawing it inside mold
01/12/2000CN1048200C Apparatus for producing thin metallic tube
01/1998
01/20/1998US5709021 Process for the manufacture of metal tubes
11/1995
11/23/1995WO1995031298A1 A process for the manufacture of metal tubes
01/1995
01/18/1995CN1097360A Apparatus for producing thin metallic tubd
01/1992
01/15/1992EP0466017A1 Process for hot drawing hollow extruded or drawn aluminium bodies and equipment for application of said process
09/1990
09/19/1990CN2062261U Round ball reset releasing device for cold drawing machine
05/1990
05/22/1990US4926667 Method of sizing and straightening extruded tubes
01/1990
01/03/1990EP0348596A2 A pilgrim-process rolling mill for hot rolling pipes
01/1989
01/17/1989CA1248740A1 Method for preparing tubular chills for continuous steel casting plants
05/1988
05/19/1988DE3726898C1 Device and method for loosening the drawn stock on the mandrel bar
03/1987
03/31/1987US4653306 Method for preparing tubular chills for continuous steel casting plants
04/1985
04/23/1985US4512173 Tube release rolling mills
03/1984
03/27/1984CA1164251A1 Manufacture of seamless steel tube
03/1983
03/01/1983US4375160 Manufacture of seamless steel tube
06/1981
06/03/1981EP0029786A1 Process and device for producing a steel tube without welding joint by hot-rolling on a mandrel
06/1979
06/26/1979US4158954 Extraction device for continuous rolling mills using a retained mandrel
05/1978
05/30/1978US4091524 Process for producing pipe blooms
03/1976
03/16/1976US3943741 Embossing method
01/1976
01/06/1976US3930394 Mill for plugging tubes and taking them off plug