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US3681960A - Method and apparatus for forming valve bodies - Google Patents

Method and apparatus for forming valve bodies Download PDF

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Publication number
US3681960A
US3681960A US30443A US3681960DA US3681960A US 3681960 A US3681960 A US 3681960A US 30443 A US30443 A US 30443A US 3681960D A US3681960D A US 3681960DA US 3681960 A US3681960 A US 3681960A
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US
United States
Prior art keywords
blank
pressing
forming
dies
passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US30443A
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English (en)
Inventor
Toyotoshi Tadokoro
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Furubayashi Kogyo KK
Original Assignee
Furubayashi Kogyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP1969037657U external-priority patent/JPS4916360Y1/ja
Priority claimed from JP44034302A external-priority patent/JPS4916715B1/ja
Application filed by Furubayashi Kogyo KK filed Critical Furubayashi Kogyo KK
Application granted granted Critical
Publication of US3681960A publication Critical patent/US3681960A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/039—Means for controlling the clamping or opening of the moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/037—Forming branched tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/043—Means for controlling the axial pusher
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49405—Valve or choke making
    • Y10T29/49426—Valve or choke making including metal shaping and diverse operation

Definitions

  • upper and lower pressing dies between which the blank is disposed and pistons extending into the dies in four directions, with the piston for pressing the opening of the blank being provided with an inlet for supplying the pressure oil into the blank and an outlet for discharging the pressure oil.
  • the blank is pressed by the dies for preliminary forming and then subjected to the hydraulic bulge forming.
  • valve bodies As substitutes for conventional valve bodies made of cast iron or steel, seamless valve bodies have already been produced from a length of seamless pipes by hydraulic bulge forming, and methods and apparatuses for this purpose are known.
  • a portion of the blank In forming a tubular blank into a valve body, a portion of the blank has to be bulged markedly in order to form the main part of the valve body for housing a valve disk and a valve seat.
  • the valve body produced by conventional methods has a thin wall at the bulged portion, so that it has been impossible to obtain valve bodies of high strength because those heretofore produced are not satisfactory in rigidity which is strictly essential to the product.
  • valve bodies whose main portions are bulged to an extreme extent by the foregoing method are by no means employable in practical use.
  • the present invention has accomplished improvements over conventional methods for producing valve bodies and provides valve bodies with a uniform wall thickness so as to impart a high rigidity to the valve bodies even when the products include main parts bulged to a great extent.
  • An object of the present invention is to form a bottomed tubular blank into a valve body by hydraulic bulge forming so as to provide the main part of the valve body with a small degree of bulging for correction of irregularity in wall thickness of the product, with the valve body obtained thus being of a high rigidity and excellent resistance to corrosion and impact of fluid due to cavitation or the like.
  • Another object of the present invention is to subject the blank to a preliminary forming by a pair of dies and then subsequently to the above-mentioned bulge forming in the dies.
  • valve bodies of a higher degree of deformation such as those provided with slide valve guides or those of a modified sectional shape such as oval or rectangular shape can be readily formed with a uniform wall thickness.
  • the present method is therefore very advantageous from the viewpoint of operation efficiency and maintenance of the dies.
  • the method of the present invention is practiced by an apparatus comprising a pair of upper and lower dies provided with blank gripping portions for defining a horizontal passage, each of the dies being provided at its center portion with a bulging hole formed at a rightangle with the blank gripping portion, a clamp press for clamping the upper and lower dies provided with stopper pistons inserted into the bulging holes respectively, and pressing pistons extending into the passage at its opposite ends, with one of the pressing pistons being provided with a pressure oil inlet and a pressure oil outlet extending to the end surface thereof, and the other of the pressing pistons being provided with an end surface of a shape in conformity with the shape of the bottom of a product to be obtained.
  • a bottomed tubular blank is placed in the passage in clamping engagement with the upper and lower dies and the two stopper. pistons are stopped at the desired positions. Pressure oil is introduced into the blank by way of the pressing piston while the blank is being pressed by the two pressing pistons at the opposite sides thereof, so that the blank is bulged to the shape defined by the dies and each of the pistons.
  • the dies are further provided with bulging grooves for bulging the corresponding portions of the valve body in straight or annular shape, reinforcing ribs or portion for receiving a seat ring may simultaneously be formed at the desired position during the operation.
  • valve body has to be produced by deforming a bottomed tube to a great extent because of the deformed section of the product such as an oval or rectangular shape
  • the blank placed in the dies may be deformed by means of the dies to a shape resembling the valve body to be obtained and then subjected to hydraulic bulge forming.
  • the preworking thus effected makes it easier to produce valve bodies of special shapes with satisfactory quality.
  • a simultaneous provision of slide valve guides in the valve bodies can be readily achieved by modifying the form of the dies.
  • a seat for fixing a cock or the like can be formed simultaneously in the bottom of the product. If the end portion of this pressing piston is so made as to be replaceable, the form of the end surface can be varied as desired by the replacement of the end portion.
  • FIG. 1 is a view in section illustrating an apparatus for producing a valve body by the principal method of the present invention, the apparatus being shown as it is in operation;
  • FIG. 2 is an exploded view and illustrates a method for producing a tubular body with a bottom to be used as a blank in the present invention, (a) showing a tubular material before it is subjected to working, (b) showing the tubular blank obtained;
  • FIG. 3 is an exploded view and shows typical forms of the bottomed tubular blank to be used in the present invention, (a) showing a tubular blank with a flat bottom, (b) showing a tubular blank with a bottom of modified form, the views illustrating the blank in section taken along the planes intersecting at the angle of FIG. 4 is an exploded view and shows the principal embodiments of pressing pistons, (a) illustrating a pressing piston for introducing pressure oil into a blank, (b) illustrating another pressing piston for shaping the bottom of a valve body;
  • FIG. 5 is a view in section showing a modified embodiment of a pair of dies
  • FIGS. 6 (a) and (b) show modified forms of the end of the pressing piston for defining the bottom shape of a valve body
  • FIG. 7 shows an example of the valve body produced by the apparatus in FIG. 1, (a) being a side elevation, (b) being a front view in vertical section;
  • FIG. 8 is an exploded view and shows the form of the dies and deformed blanks obtained by preliminary pressing conducted prior to hydraulic bulge forming
  • valve body circular in section which is provided, in opposite sides, with ribs serving as reinforcements and slide valve guides
  • valve body oval in section which is provided, in its opposite sides, with ribs serving as reinforcements and slide valve guides
  • valve body rectangular in section which is provided, in its opposite sides, with ribs serving as reinforcements and slide valve guides
  • FIGS. 9 (a), (b), and (c) are end views and sectional views showing various forms of the endof the pressing piston 'on one side to be used for bulge forming of the valve bodies which have sectional forms shown in FIGS. 8 (a), (b) and (c); and
  • FIG. 10 is a perspective view showing a slide valve made of a tubular blank having a circular form in'section shown in FIG. 8 (a).
  • A a pair of an upper die 1 and a lower die 2.
  • Each of the dies 1 and 2 is provided with a blank gripping portion 4 for defining a horizontal passage 3 having openings at opposite ends and a bulging hole 5 formed in the center thereof at a right angle with the blank gripping portion 4.
  • a clamp press B for pressing the upper and lower dies 1, 2 is provided with knockout cylinders (not shown) for driving stopper pistons 6 into the bulging holes 5 formed in the dies 1 and 2.
  • a pressing piston 7 extends into the passage 3 at one opening thereof and a second pressing piston 8 extends into the passage 3 at the other opening, with both pressing pistons being so shaped in section as to be fitted into the passage 3.
  • the pressing piston 7 has an oil inlet 9 and an oil outlet 10 extending to its end surface 7a, while the pressing piston 8 has an end surface 8a in conformity with the form of bottom 11 of a product C to be formed.
  • Designated at 12 is a distance piece attached detachably to the end of the pressing piston 8.
  • the end surface 8a is formed at the front end of the distance piece 12.
  • the distance piece 12 serves to change the position of the end of piston 8 when the piston is advanced to the greatest extent with a constant stroke and to modify the shape of the end surface 80.
  • the pressing piston 7 is provided at its end with a portion 7b having a smaller diameter to be fitted into the mouth of a blank D and a stepped portion 70 to be brought into contact with edge 13a of the mouth for oiltight contact with the blank D during the bulging operation.
  • Oil ducts l4 and 15 communicate with the oil inlet 9 and outlet 10 and are each provided with control values V and V
  • Employed as the blank D is a tube closed at one end obtained by subjecting a tubular article 16 to friction forming or hot spinning or a bottomed tube produced by plastic working such as forging or sheet metal working.
  • the shape of the blank D is versatile as shown in FIG. 3 and is selected depending upon the shape of the valve body to be formed. The closed end may be in flat shape as seen in FIG.
  • FIG. 2 shows a method of shaping the blank D by friction forming, in which one end 16a of a tube 16 is pressed against recessed portion 17a of a die 17 with relative rotation being effected therebetween to produce friction.
  • the end 16a of the tube 16 while being guided and gathered together, is fused to a closed shape by the heat generated whereby the bottomed tubular blank D as shown in FIG. 2 (b) is obtained.
  • the blank D is placed between the gripping portions 4 of the upper die 1 and lower die 2, which are then brought to clamping position by the clamp press B.
  • the piston 7 and. the second piston 8 are thereafter advanced to bring them into pressing contact with the blank D at the opposite sides, with the piston 7 being in oiltight contact with the mouth 13 of the blank D within the passage 3.
  • the control valve V for the oil duct 14 and the control valve V for the oil duct 15 are opened to introduce pressure oil into the blank D through the inlet 9 and allow the oil to flow into the oil duct 15 through the outlet 10 whereby air is driven out of the blank D. Then the control valve 15 is closed.
  • Oil of higher pressure is introduced through the inlet 9 to bulge the blank D while the blank D is being subjected to horizontal pressure exterted thereon simultaneously by the pistons 7 and 8 actuated in operative relationship with each other, with the result that the portions of the blank D which are positioned at the holes 5 are bulged into the holes until the portions are blocked by the stopper pistons 6 inserted in the holes 5.
  • the bottom or closed end of the blank D is brought into fitting contact with the end surface 8a of the piston 8. In this manner, a seamless valve body of the desired shape can be made of the bottomed tubular blank D in one step of process.
  • annular bulged portion 19 serves to reinforce the valve body and can be utilized as the space for inserting a seat ring.
  • the bulged portion 22 serves to reinforce the valve body and serves as a guide when the valve body is employed as a slide valve.
  • the bulged portions above may be provided as desired simultaneously when the valve body is fonned.
  • the product C shown in FIG. 7 is obtained by cutting off the end of portion 23 which is bulged into the hole 5. If a cavity 24 is formed in the end 8a of the piston 8 as shown in FIG. 6 (a), a projection corresponding to this cavity is produced in bottom 11 of the valve body. When it is required to attach a cock or the like, the projection serves as a seat therefor. With the end surface 8a shown in FIG. 6 (b), a valve body having a bottom shown in FIG. 7 is obtained.
  • the bottomed tubular blank D is formed into a valve body with a small degree of deformation, with the resultant advantages that the bulged portion has a thick wall to insure desired regidity and strength against corrosion and shock impact due to cavitation of fluid or the like.
  • the blank may be subjected to'a markedly great degree of deformation even with the use of a bottomed tubular material.
  • the present invention when practiced in the following manner, can be applied to such case with good results.
  • This method is employed in working a blank D which is not identical with a product C to be obtained in sectional shape taken at right angle with the axis.
  • Mainly used as the blank D is a material exactly circular in section which is easy to work.
  • the blank D placed between the gripping portions 4 of the upper and lower dies 1, 2 is deformed to a sectional shape identical with or similar to that of the valve body to be produced by utilizing the clamping force of the press B.
  • the deformation produced is illustrated in FIG. 8, in which (a) shows a mode of preworking for producing a product C approximately circular in section, FIG. 8 (b) showing another mode of preworking for forming a product C which is oval in section, and FIG.
  • the blanks D indicated in imaginary lines in these figures are all circular in section, while the preworked blanks E are each provided at opposite sides, with ribs 25 serving as reinforcements and slide valve guides and formed simultaneously by the preliminary working. Alternatively, the ribs may be provided by a hydraulic bulge forming to be described later.
  • the upper die 1 indicated in the dot-dash line in FIG. 8 shows the position prior to the preworking.
  • the preworked blank D may not necessarily be of a sectional shape in conformity with the shape of passage 3 defined by the upper die 1 and the lower die 2, but it may be in such shape as resembling the shape of the passage 3.
  • the outer diameter of the blank D may be such that the blank can be deformed to the sectional shape of the passage 3 without objectionable results.
  • the pistons 7 and 8 are driven forward into pressing contact with the blank D at its opposite sides while the upper and lower dies 1, 2 are retained in clamping position by the press B.
  • the piston 7 is held in oiltight contact with the mouth 13 of the blank D within the passage'3 and pressure oil is then introduced into the blank D.
  • the blank D is bulged to the shape of a valve body to be obtained. This process assures formation of the desired valve body with extreme ease without producing a local thin wall portion even when the blank D is different from the valve body to be obtained in sectional shape.
  • a material which is in a specific sectional shape such as in oval or elliptical form
  • a material exactly circular in section and therefore easier to work can be used even in forming a valve body such as a slide valve which has a special shape.
  • FIG. 9 shows an example of the product C, obtained by using this type of piston, which has a cylindrical main portion 27 provided in opposite sides with reinforcing ribs 25 serving also as valve guides as aforementioned, with reinforcing ribs 29 further being formed at junctions of the main body 27 and joints 28.
  • the reinforcing rib 29, serving as a space for inserting a seat ring as already described, is formed by the hydraulic bulge forming carried out subsequently to preworking.
  • the reinforcing ribs 25, if they are not formed by preliminary working, are provided by hydraulic bulge forming after preworking.
  • An apparatus for producing a valve body from a tubular blank'having an open end and a closed end comprising an upper die and a lower die, each die having a surface adapted to be brought into engagement when the dies are together, each die having a blank gripping portion, with said gripping portions coacting, when the dies are together, to provide a horizontal passage extending entirely through the dies, each die being provided at its center portion with a'bulging hole disposed at a right angle with respect to the blank gripping portion, said holes being in registry and in communication with the horizontal passage when the dies are together, a clamp press for clamping the upper and lower dies together provided with a stopper piston inserted into each bulging hole, a pressing piston extending into the horizontal passage from each opposite end thereof for movement relative to each other, one of said pressing pistons having an end portion provided with an oil inlet and an oil outlet, the other of said pressing pistons having an end portion corresponding in form to the bottom of a body to be produced, the end portion of said one piston having
  • the apparatus for forming a valve body from a tubular blank as claimed in claim 1 including means for advancing both of said pressing pistons at the same velocity in operative relationship with each other.
  • a method for forming a valve body from a tubular blank having an open end and a closed end comprising placing the tubular blank in a passage between an upper die and a lower die, with each of said upper and lower dies being provided with a blank gripping portion coacting to define said passage; forming a bulging hole in the center of each of said dies at a right angle to the gripping portion with each hole communicating with the passage; bringing a pressing piston inserted into one end of the passage into oiltight contact with the open end of the blank; introducing pressure oil into the blank through said pressing piston so that, while the blank is being compressed at opposite sides thereof by said pressing piston and a second pressing piston inserted into said passage at the other end thereof, the blank is bulged to the shape defined by said passage, the end surface of said second-pressing piston, said bulging holes and stopper pistons inserted into said bulging holes; and cutting off portions of the formed body which are bulged into said bulging holes.
  • a method for forming a valve body from a tubular blank having an open end and a closed end comprising placing the tubular blank in a passage between an upper die and a lower die, with each of said upper and lower dies being provided with a blank gripping portion coacting to define said passage; forming a bulging hole in the center of each of dies at a right angle to the gripping portion, with each hole communicating with the passage; deforming the blank to the shape in section of said passage by compressing the blank with said dies; sealing the open end of the blank in an oil-tight manner by advancing separate pressing pistons inserted into said passage at the opposite ends thereof; introducing pressure oil into the blank through one of said pressing pistons so as to bulge the blank to such an extent that the blank is blocked by stopper pistons respectively disposed in said bulging holeswhile the blank is being compressed by said pressing pistons advanced at the same velocity in operative relationship with each other, with the closed end of the blank thereby being deformed to the shape of the end surface of said pressing piston in contact with the

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US30443A 1969-04-22 1970-04-21 Method and apparatus for forming valve bodies Expired - Lifetime US3681960A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1969037657U JPS4916360Y1 (de) 1969-04-22 1969-04-22
JP44034302A JPS4916715B1 (de) 1969-05-01 1969-05-01

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DE (1) DE2019439A1 (de)
GB (1) GB1245215A (de)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3961513A (en) * 1975-04-11 1976-06-08 Elkhart Products Corporation Method of making pipe fittings
US4047412A (en) * 1976-11-15 1977-09-13 Elkhart Products Corporation Method of making a pipe fitting and product
US4414834A (en) * 1981-02-05 1983-11-15 Carrier Corporation Method for expanding tubular blanks
US5522423A (en) * 1994-08-15 1996-06-04 Elliott; Pat S. Forged body full port swing check valve
US6158772A (en) * 1998-02-17 2000-12-12 Cosma International Inc. Vehicle frame member having a shock absorbing mounting portion and a method for making the same
US6202460B1 (en) * 1998-12-18 2001-03-20 Tubes Et Formes Method and device for producing a Y-fitting from a metal tube by hydroforming
US6446338B1 (en) * 2001-06-25 2002-09-10 Lei-Jui Wu Method of sluice gate valve fabrication
US6497128B1 (en) * 2001-03-16 2002-12-24 Dana Corporation Method of hydroforming a fuel rail for a vehicular fuel delivery system
US20030038190A1 (en) * 2001-04-06 2003-02-27 Newbold John D. Nozzle for precision liquid dispensing and method of making
US20030084694A1 (en) * 2001-05-01 2003-05-08 Kevin Gong Methods of and apparatus for pressure-ram-forming metal containers and the like
US20040194522A1 (en) * 2001-05-01 2004-10-07 Peter Hamstra Method of pressure-ram-forming metal containers and the like
US20050097935A1 (en) * 2002-03-01 2005-05-12 Markus Gehrig Method for shaping a bent single- or multiple-chamber hollow profile internal high pressure
EP1561982A1 (de) * 2004-02-03 2005-08-10 R. Nussbaum AG Armatur
US20050252263A1 (en) * 2004-05-14 2005-11-17 Macewen Stuart R Methods of and apparatus for forming hollow metal articles
CN102319790A (zh) * 2011-07-16 2012-01-18 陈国强 一种阀体的加工方法
WO2013049880A1 (en) 2011-10-08 2013-04-11 Triteck Limited Device for a plumbing installation
EP3461568A1 (de) * 2017-09-29 2019-04-03 Beijing Kohler Ltd. Verfahren zur herstellung von schalen für badezimmerbeschläge
US10989325B2 (en) * 2015-04-10 2021-04-27 Bürkert Werke GmbH & Co. KG Method for producing an actuator

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2753463C2 (de) * 1977-11-30 1984-10-04 Vereinigte Edelstahlwerke Ag (Vew), Wien Verfahren und Vorrichtung zur Umformung rohrförmiger Körper
GB2162446B (en) * 1984-07-26 1987-06-24 Ti Gas Spares Ltd Components for gas fired appliances
US5070717A (en) * 1991-01-22 1991-12-10 General Motors Corporation Method of forming a tubular member with flange
JP2908565B2 (ja) * 1993-08-23 1999-06-21 ダンフォス アクチェセルスカベト 冷凍システムの膨張バルブ及びこれを製造する方法
DE4339290C2 (de) * 1993-11-18 1995-11-02 Daimler Benz Ag Verfahren zum Herstellen von Rohr-T-Stücken aus einem unverzweigt durchgehenden Ausgangsrohrstück durch Innenhochdruck-Umformung sowie Vorrichtung zur Durchführung des Verfahrens
DE102010023855B4 (de) * 2010-06-15 2018-11-15 Bürkert Werke GmbH Verfahren zur Herstellung eines metallischen Ventilgehäuses

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US2243809A (en) * 1934-10-03 1941-05-27 W S A Inc Method of making hollow wrought metal articles
US3350905A (en) * 1963-12-21 1967-11-07 Agency Ind Science Techn Liquid pressure bulge forming apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2243809A (en) * 1934-10-03 1941-05-27 W S A Inc Method of making hollow wrought metal articles
US3350905A (en) * 1963-12-21 1967-11-07 Agency Ind Science Techn Liquid pressure bulge forming apparatus

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3961513A (en) * 1975-04-11 1976-06-08 Elkhart Products Corporation Method of making pipe fittings
US4047412A (en) * 1976-11-15 1977-09-13 Elkhart Products Corporation Method of making a pipe fitting and product
US4414834A (en) * 1981-02-05 1983-11-15 Carrier Corporation Method for expanding tubular blanks
US5522423A (en) * 1994-08-15 1996-06-04 Elliott; Pat S. Forged body full port swing check valve
US6158772A (en) * 1998-02-17 2000-12-12 Cosma International Inc. Vehicle frame member having a shock absorbing mounting portion and a method for making the same
US6158122A (en) * 1998-02-17 2000-12-12 Cosma International Inc. Vehicle frame member having a shock absorbing mounting portion and a method for making the same
US6202460B1 (en) * 1998-12-18 2001-03-20 Tubes Et Formes Method and device for producing a Y-fitting from a metal tube by hydroforming
US6497128B1 (en) * 2001-03-16 2002-12-24 Dana Corporation Method of hydroforming a fuel rail for a vehicular fuel delivery system
US20030038190A1 (en) * 2001-04-06 2003-02-27 Newbold John D. Nozzle for precision liquid dispensing and method of making
US20030071149A1 (en) * 2001-04-06 2003-04-17 Verilli Brian L. Method of making a thin wall nozzle
US7231716B2 (en) * 2001-04-06 2007-06-19 Verilli Brian L Method of making a thin wall nozzle
US7107804B2 (en) 2001-05-01 2006-09-19 Novelis Inc. Methods of and apparatus for pressure-ram-forming metal containers and the like
US20030084694A1 (en) * 2001-05-01 2003-05-08 Kevin Gong Methods of and apparatus for pressure-ram-forming metal containers and the like
US20040187536A1 (en) * 2001-05-01 2004-09-30 Kevin Gong Methods of pressure-ram-forming metal containers and the like
US20040194522A1 (en) * 2001-05-01 2004-10-07 Peter Hamstra Method of pressure-ram-forming metal containers and the like
US6802196B2 (en) * 2001-05-01 2004-10-12 Alcan International Limited Methods of and apparatus for pressure-ram-forming metal containers and the like
US6446338B1 (en) * 2001-06-25 2002-09-10 Lei-Jui Wu Method of sluice gate valve fabrication
US20050097935A1 (en) * 2002-03-01 2005-05-12 Markus Gehrig Method for shaping a bent single- or multiple-chamber hollow profile internal high pressure
EP1561982A1 (de) * 2004-02-03 2005-08-10 R. Nussbaum AG Armatur
US20050252263A1 (en) * 2004-05-14 2005-11-17 Macewen Stuart R Methods of and apparatus for forming hollow metal articles
US7191032B2 (en) 2004-05-14 2007-03-13 Novelis Inc. Methods of and apparatus for forming hollow metal articles
CN102319790A (zh) * 2011-07-16 2012-01-18 陈国强 一种阀体的加工方法
WO2013049880A1 (en) 2011-10-08 2013-04-11 Triteck Limited Device for a plumbing installation
EP2763803A4 (de) * 2011-10-08 2015-12-30 Triteck Ltd Vorrichtung für sanitärinstallationen
US9958079B2 (en) 2011-10-08 2018-05-01 Triteck Limited Device for a plumbing installation
US10989325B2 (en) * 2015-04-10 2021-04-27 Bürkert Werke GmbH & Co. KG Method for producing an actuator
EP3461568A1 (de) * 2017-09-29 2019-04-03 Beijing Kohler Ltd. Verfahren zur herstellung von schalen für badezimmerbeschläge
US11338399B2 (en) 2017-09-29 2022-05-24 Beijing Kohler Ltd. Production method of bathroom hardware shells

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Publication number Publication date
GB1245215A (en) 1971-09-08
DE2019439A1 (de) 1971-02-04

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