EP0279012A1 - Procédé et dispositif pour fabriquer la tête d'une soupape - Google Patents

Procédé et dispositif pour fabriquer la tête d'une soupape Download PDF

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Publication number
EP0279012A1
EP0279012A1 EP87110122A EP87110122A EP0279012A1 EP 0279012 A1 EP0279012 A1 EP 0279012A1 EP 87110122 A EP87110122 A EP 87110122A EP 87110122 A EP87110122 A EP 87110122A EP 0279012 A1 EP0279012 A1 EP 0279012A1
Authority
EP
European Patent Office
Prior art keywords
piston rod
piston
extrusion
die
blank
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.)
Withdrawn
Application number
EP87110122A
Other languages
German (de)
English (en)
Inventor
Herbert Ing. Windelband (Grad.)
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.)
Sempell GmbH
Original Assignee
Sempell Armaturen GmbH
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
Application filed by Sempell Armaturen GmbH filed Critical Sempell Armaturen GmbH
Publication of EP0279012A1 publication Critical patent/EP0279012A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/20—Making machine elements valve parts
    • B21K1/22—Making machine elements valve parts poppet valves, e.g. for internal-combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08—Upsetting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/06—Swaging presses; Upsetting presses
    • B21J9/08—Swaging presses; Upsetting presses equipped with devices for heating the work-piece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/44—Making machine elements bolts, studs, or the like
    • B21K1/46—Making machine elements bolts, studs, or the like with heads
    • 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
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49298—Poppet or I.C. engine valve or valve seat making
    • Y10T29/49307—Composite or hollow valve stem or head making
    • Y10T29/49309—Composite or hollow valve stem or head making including forging
    • 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
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49298—Poppet or I.C. engine valve or valve seat making
    • Y10T29/49307—Composite or hollow valve stem or head making
    • Y10T29/49311—Composite or hollow valve stem or head making including extruding

Definitions

  • the invention relates to a method for producing a poppet valve head by extrusion of the stem and hot forming of the plate and a device for carrying out the method.
  • poppet valves that are known as Are formed bimetal
  • the poppet valve head is welded to the actual valve stem with a short stem part.
  • the valve head is produced from a cylindrical blank which has a suitable diameter and is cut to the length suitable for the subsequent forming.
  • the necessary short stem attachment is then produced from this cylindrical blank by extrusion, whereupon the blank with the stem attachment is inserted into an upsetting device in which the valve plate is compressed from the thicker part of the blank remaining after the extrusion.
  • the invention is therefore based on the object of proposing a method for producing a poppet valve head which allows simple automation and an apparatus for carrying out the method is to be proposed.
  • this object is achieved according to the invention in that a finished form die in the shaft area and extended shaft area is filled by a heated and cut cylindrical blank by means of extrusion molding and the plate area by immediately followed upset pressing.
  • the finished form die made of hard metal is used as an extrusion die, which means that it is no longer necessary to move the partially machined blank after the extrusion.
  • not only the shaft piece, but also the enlarged shaft area is produced by extrusion.
  • a pre-compressed head blank is created in the plate area, which can be hot formed into the finished head by upsetting in the finished form die.
  • This process makes it possible, for example, to form the finished poppet valve head from the blank in a single processing station.
  • the establishment of a separate extrusion station is completely unnecessary.
  • the blank is guided by a stamp guide bushing of an extrusion stamp during the extrusion.
  • a particular advantage arises when the upsetting speed is regulated during the upsetting process in such a way that the upsetting speed always remains below the softening rate.
  • the compression process causes the material to solidify and thus requires a great deal of force. However, the heat soon softens the material again. The softening takes place the slower the more advanced the individual upsetting process is.
  • the softening rate is the compression rate at which the material has just enough time to soften. If this compression speed is not exceeded, the force required for the compression process is significantly reduced. It must be noted that this compression speed decreases with increasing compression travel after an exponential function. The flow rates of the pumps driving the upsetting cylinders must therefore be regulated accordingly.
  • a device suitable for carrying out the method has a finished form die arranged in a support frame for the poppet valve head with a cylindrical guide area on the plate side, and a power-operated annular piston which fits into the guide area and in the interior of which a blank can be inserted onto a coaxially arranged, power-operated Extrusion die, the extrusion die being axially displaceable both together with the annular piston and axially displaceable relative to the latter.
  • the blank used can now be easily moved together with the ring piston and the extrusion die to a first station, in which the ring piston is immersed in the guide area of the finished form die is. The immersion depth is just large enough to ensure sufficient guidance on the blank for the extrusion process.
  • the aim of the invention in particular is to achieve a favorable construction of the device for carrying out the method according to the invention, which enables good control of the extrusion process and upsetting. Furthermore, a combined use of components that are essential for a single step is also sought in order to keep the number of necessary components low and to achieve a higher degree of utilization of the existing components.
  • An example of this is the use of the punch guide bush of the extrusion die on the one hand as a power-operated ring piston and on the other hand as a guide for the blank.
  • the invention is intended to design the entire device in such a way that it can be easily repaired on the one hand and easily converted to other sizes or shapes on the other hand.
  • the device should be closed in terms of force, so that external components for force absorption are superfluous.
  • a support frame 8 as an upper bolt and a cross member 15 are arranged in an opposing arrangement and at a distance from one another by tie rods 16.
  • the support frame 8 has a central bore 27, which can be designed as a stepped bore.
  • An ejection cylinder 28 with an ejector 29 can be arranged in the upper part of the bore, the ejection cylinder 28 and the ejector 29 having the function of ejecting a finished workpiece from the preforming die 1.
  • the finished form die 1 is arranged coaxially with the ejection cylinder 29 in the stepped bore 27 of the support frame 8.
  • the finished form die 1 has a shaft area 2 and an enlarged shaft area 3 and a plate area 5, which continues into a cylindrical guide area 9.
  • the preformed die 1 can be placed in the central bore 27 on a spacer 30 and inserted in order to adapt different diameters into a correspondingly inserted bushing 31, which can also be made of hard metal and thus forms a hard metal armor.
  • the bushing 31 is exchangeable and serves to compensate for different diameters of the preformed die 1, so that the preformed die 1 is always arranged securely and firmly in the central bore 27.
  • the socket 31 is no longer shown in FIG.
  • the traverse 8 is further traversed in the region of the central bore 27 by cooling channels 32 through which any coolant can be passed in order to remove the necessary amount of heat.
  • the support frame further has two fluid-actuated cylinders 19 and 20 with the piston rods 17 and 18 arranged parallel to the working direction and to the axis of the finished-form die 1 on both sides of the finished-form die 1.
  • the end faces 21 and 22 of the piston rods 17 and 18 protrude into the working space 33 of the device at least in one end position of the piston rods 17 and 18 and in this position form a stop with which the axial movement of a punch guide bush 6 is limited to a first stage, so that the stamp guide bush 6 is thereby positioned in a first position.
  • a retaining ring 34 can also be provided, by means of which the finished-form die 1 is held. Such a retaining ring 34 is no longer shown in FIG. 2 for the sake of simplicity.
  • the fluid operated cylinders 19 and 20 are pressurized with the pressure P 3 via the pressure connections 35. If the pressure connections 35 are relieved, the piston rods 17 and 18 can simply be inserted.
  • the cylinder stroke of the fluid-actuated cylinders 19 and 20 can be dimensioned so that in the extended end position the end faces 21 and 22 forming a stop surface are in the correct stop position.
  • the traverse 15 carries in a coaxial arrangement two likewise fluid-actuated actuating cylinders 13 and 14, the correspondingly coaxially arranged piston rods 11 and 12 of which are nested telescopically, the piston rod 11 forming the inner and the piston rod 12 forming the outer piston rod.
  • the housing 14 ⁇ of the actuating cylinder 14 is attached directly to the cross member 15.
  • the actuating cylinder 14 is covered by a sealing intermediate plate 36 on which the housing 13 ⁇ , designed as a cylinder tube with flange and cover, is arranged coaxially to the housing 14 ⁇ , designed as a cylinder tube.
  • the piston rod 11 is connected to a piston 37 and the piston rod 12 is connected to a piston 38.
  • a spacer sleeve 39 is also arranged coaxially with the piston rod 12 and surrounds it with which the axial path of the piston 38 and thus the length of the extension path for the piston rod 12 is limited, but which can also guide the piston rod 12 radially.
  • the piston rod 12 is guided radially on the one hand in the housing 14 by the piston 38 and on the other hand by the cover ring 40.
  • the piston rod 11 is guided radially within the piston rod 12 by means of the bushes 41 and 42.
  • the front end face of the bushing 41 is covered by a driving ring 23 which is fastened to the piston rod 12 and comprises the piston rod 11.
  • a ring-shaped counterpart 24 is attached to the front end of the piston rod 11 and has an outer diameter that is larger than the diameter of the piston rod 11, so that the counterpart 24 radially partially covers the driving ring 23. This means that when the piston rod 12 is axially displaced in the direction of the working space 33, the driving ring 23 comes to rest on the counterpart 24 and then carries the piston rod 11 with it.
  • the piston rod 11 has an axially directed bore 43 at the front end facing the working space 33, into which an extrusion die 7 with a shaft piece 44 is inserted.
  • the shaft piece 44 is supported on a shim 45.
  • the exact axial position of the extrusion die 7 can be determined by means of the thickness of the shim 45.
  • the shaft piece 44 which is thicker in diameter than the diameter of the extrusion die 7, is held in the bore 43 by the counterpart 24, which has a corresponding bore (not designated in more detail) for the guide die 7.
  • a spacer ring 46 is loosely placed on the piston rod 11 between the driving ring 23 and the counterpart 24 .
  • the piston rod 12 has at its front end facing the working space 33 a support piece 47 which carries the punch guide bush 6 which is inserted into a corresponding recess 48.
  • This stamp guide bushing 6, as shown in FIG. 2 can be fastened via a retaining ring 49 or, as shown in FIG. 1, directly to the support piece 47.
  • the support piece 47 has a bore 50 for the extrusion die 7.
  • a corresponding bore also has the punch guide bush 6, which is intended to guide the extrusion punch 7.
  • the punch guide book 6 here has an annular piston 10 facing the working space 33, the inner bore of which corresponds to the unspecified bore of the punch guide bush 6 and the outer diameter of which is selected to match the diameter of the cylindrical guide region 9 of the finished-form die 1.
  • a blank 4 which has already been cut to length and heated to the necessary temperature and has a diameter corresponding to the diameter of the extrusion die 7, is placed in the free space of the die guide bushing 6 so that it rests on the retracted extrusion die 7 and thereby something protrudes beyond the end region of the annular piston 10, as shown in FIG. 1.
  • the pressure connections 35 are acted upon by the pressure P 3, so that the piston rods 17 and 18 of the fluid-actuated cylinders 19 and 20 move into their outer end position, as is shown both in FIG. 1 and in FIG. 2.
  • the housing 14 ⁇ of the actuating cylinder 14 has a pressure connection at the lower end, which is acted upon by the pressure P 1 of a flow medium, so that the piston 38 and thus the piston rod 12 are driven out.
  • the piston rod 11 is entrained via the driving ring 23 and the counterpart 24.
  • the annular piston 10 of the punch guide bush 6 is moved into the cylindrical guide region 9 of the preforming die 1 until the end face 51 comes to rest against the end faces 21 and 22 of the piston rods 17 and 18, respectively. There is then a situation as shown in FIG. 2.
  • the actuating cylinder 13 is now subjected to a pressure P 2 on the side of the piston 37 facing away from the piston rod 11 via the lower pressure connection, and the piston rod 11 is thereby driven out until the distance 52 becomes zero and thus the surfaces 26 and 25 abut each other.
  • the front end face of the extrusion die 7 lies in one plane with the front end face of the annular piston 10, so that a closed surface is formed.
  • the blank area 2 of the shaft area 2 and the enlarged shaft area 3 have already been completely filled by the above-described extrusion process and a thickened area has formed in the plate area 5, from which the plate is later formed.
  • the pressure P 3 is now removed, for example, so that the piston rods 17 and 18 can be easily pressed in.
  • the force of the pistons 38 and 37 predominates, driven by the pressures P 1 and P 2, so that now the extrusion ram 7 and the annular piston 10 move forward together by the amount 53 until this amount becomes zero, i.e. the stop surface 55 the stamp guide bushing 6 rests on the end face 54 of the bushing 31 or the finished form die 1.
  • the poppet valve head is now finished.
  • tie rods 16 are, for example, passed through corresponding bores in the crossmember 15 and the support frame 8 and countered on the back by nuts 56.
  • the pressure connections P 1 and P 2 are simply relieved.
  • a pressure connection P 4 is always at the appropriate pressure and keeps the cylinders 13 and 14 always filled with the appropriate pressure via the lines 57 and 58. If the ports P 1 and P 2 are relieved, the pressure from the port P 4 predominates, so that the pistons 37 and 38 and thus their piston rods 11 and 12 return to the starting position.
  • the fluid supplied via the pressure connection P 4 can also be used for heat dissipation on the device itself and in particular on the tools.
  • the oil emerging from the line 57 in the cylinder 14 can be led via the line 59 to the support piece 47 and can be passed there through the support piece 47 in a suitable manner for the necessary removal of heat.
  • a constant throttle 60 (FIG. 2) is inserted into the line 59.
  • the pressure medium used as a coolant is thus conducted via line 59 through constant throttle 60 and then for cooling through support piece 47 and then guided via line 61 and 62 into a recess 63 of spacer sleeve 39.
  • the coolant can also be guided into the free space 64 between the piston rod 12 and the piston rod 11 via the line 62. Since the Line 61 and 62 is a return line, however, there is a significantly lower potential than the potential P 4. It is therefore the oil returned via line 61 and 62 in the recess 63 through a bore 65 in the wall of the spacer 39 into an outer recess 66 and from there via line 67 to the outside or back into the tank.
  • the line 67 here represents the connection P 5.
  • the potential P 4 is also conducted into the cylinder 13 via the line 58.
  • the medium supplied via the line 58 into the cylinder space 13 is pressed through a transverse bore 68 in the piston rod 11 into the longitudinal bore 69 running in the axis of the piston rod 11.
  • a constant throttle 70 (FIG. 2) is again arranged in the bore 69 in order to prevent the pressure P 4 from dropping excessively.
  • the cooling medium is led via the only indicated lines 71 and 72 (FIG. 2) through the extrusion die 7 and from there back into the line 73, which ends in a transverse bore 74 in the piston rod 11. If necessary, the transverse bore 74 can open into a circumferential groove 75.
  • the line 73 is closed at its end opposite the transverse bore 74 with a line plug 76.
  • the coolant passes through the transverse bore 74 into the space between the piston rod 12 and the piston rod 11 and can thus return to the connection P 5 via the line 62 in the manner already described.
  • the location of the device in the room is preferably as shown in Figures 1 and 2. However, such a location is only advantageous, but not mandatory. In principle, any position can be taken up by the facility.
  • the ejection cylinder 28 can be actuated so that the workpiece is ejected from the finished form die 1 by means of the ejector 29.
  • the ejection cylinder 28 with the ejector 29 can be of any type.
  • the entire facility as such can, for example, on the Traverse can be connected to an arbitrarily designed stand, so that the device can be fastened to a foundation or to other machines or machine groups.
  • the means with which the entire device is attached to any other assembly or on a foundation are not the subject of the invention. Their design is at the discretion of the average professional.
  • FIG. 3 shows a hydraulic circuit diagram of a hydraulic device with which the device according to the invention could be operated.
  • a three-phase motor MO drives the control pumps HP 1 and HP 2, each of which has an electric solenoid YHP 1 and YHP 2.
  • the electrical solenoids YHP 1 and YHP 2 mentioned can e.g. are controlled by a machine control, not shown, so that the delivery rates of the control pumps HP 1 and HP 2 can be regulated in any way during operation. This is important in order to regulate the travel speed of the working tools, which depends on the delivery capacity of these pumps, in the desired manner during operation, for example according to an exponential function, such that the travel speed slows down as the travel path progresses according to this exponential function. Such regulation is necessary, for example, in order to always remain below the softening speed and thus to reduce the compression forces.
  • the pumps HP 1 and HP 2 are still secured by a so-called pressure cut-off AHP 1 and AHP 2.
  • the hydraulic system has two hydraulic accumulators HS 1 and HS 2, which determine the potentials P 3 and P 4 and supply the cooling circuit of the tools via the throttles 60, 70.
  • the filling status of the hydraulic accumulators mentioned is supplemented during the workpiece changing time.
  • the hydraulic accumulator HSP 1 is filled in that the control valves assigned to the corresponding preload valves are brought into the corresponding switching position.
  • the magnets of the assigned control valves Y 1.1 and Y 1.2 must remain in the switching position shown. This is the switch position that they assume when the power is off.
  • the corresponding switching magnet Y 1.0 and Y 1.3 have to be switched in reverse, i.e. brought into the switching state which they assume when a corresponding voltage is applied. This means, for example, that the control pressure is no longer present due to the switching of Y 1.3, so that the associated valve can flow through.
  • the hydraulic accumulator HSP 2 is filled by switching the magnets Y 2.0 and Y 2.1, while magnet Y 2.2 remains in the rest position shown.
  • the proportional magnet YHP 1 on the control pump HP 1 can receive a setpoint for the filling quantity via a control.
  • the pressure status of the hydraulic accumulators HS 1 and HS 2 is monitored by the pressure switches SP 4 and SP 3.
  • the control pump HP 1 To carry out the necessary work movement, the control pump HP 1 must work with a certain delivery rate. This is controlled as a setpoint via the proportional magnet YHP 1.
  • the switching magnets Y 1.0 and Y 1.3 are also switched, while the switching magnets Y 1.1 and Y 1.2 remain in their zero position.
  • the pump HP 1 pumps oil into the line P 1, the pressure of which is limited by the pressure relief valve HP 1.
  • the piston rod 12 of the cylinder 14 extends, thereby dragging the piston rod 11 of the cylinder 13 with it.
  • the pressure relief valve AP 1 is set so that when the piston rod 12 comes to rest with the end face 51 on the end faces 21 and 22 of the piston rods 17 and 18, the piston rods 17 and 18 do not enter their associated cylinders 19 and 20 can be pushed in.
  • the force generated jointly by the piston rods 17 and 18 must therefore be greater than the counterforce exerted by the piston rod 12.
  • the piston rod 12 thus comes to a standstill as soon as the end face 51 of the support piece 47 bears against the end faces 21 and 22 of the piston rods 17 and 18. A position according to FIG. 2 is then reached.
  • the piston rod 11 now moves on.
  • the proportional magnet YHP 2 is given a corresponding setpoint for setting the delivery rate of the pump HP 2 and the switching magnet Y 2.0 and Y 2.2 switched, while Y 2.1 remains in the rest position. If the distance 52 is now traveled through, so that the inner stop surface 25 and the counter surface 26 lie against one another, a switchover takes place. The control magnets Y 1.1 and Y 1.2 are then switched to the active position. This is the other position than that shown in Figure 3. As a result, the piston rods 12 and 11 are extended further at a speed which depends on the delivery capacity of the pumps HP 1 and HP 2. This delivery rate is regulated by the proportional magnets Y HP 1 and Y HP 2 by the machine control, not shown, in the desired manner.
  • the distance 53 is passed together as an upsetting path by the extrusion die 7 and the annular piston 10. Then the workpiece has received the desired compression and the entire circuit falls back to the zero position. It should be noted that the corresponding pressure cut-offs limit the forces which occur as the route 53 is traversed.
  • the piston rods 17 and 18 were used to limit the stroke. However, these outer stops can also be moved inwards, as shown in FIG. 4. There, the piston rods 17 and 18 with associated cylinders 19 and 20 are completely dispensed with. Instead, the spacer 39.1 is given a free space 79 so that it can execute a corresponding stroke within this free space.
  • the potential P3 is guided on the side of the stroke stop 77 into the cylinder space of the actuating cylinder 14 and pushes the spacer 39.1 against the inner stop 78. In this position it forms a first stop 80 for the piston surface 81 of the piston 38. If P3 is relieved, it can the piston 38 move the spacer 39.1 up to the stroke stop 77, which determines the end position for the piston 38 over the length of the spacer 39.1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Forging (AREA)
EP87110122A 1987-02-17 1987-07-14 Procédé et dispositif pour fabriquer la tête d'une soupape Withdrawn EP0279012A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3704948 1987-02-17
DE19873704948 DE3704948A1 (de) 1987-02-17 1987-02-17 Verfahren und vorrichtung zur herstellung eines tellerventilkopfes

Publications (1)

Publication Number Publication Date
EP0279012A1 true EP0279012A1 (fr) 1988-08-24

Family

ID=6321146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87110122A Withdrawn EP0279012A1 (fr) 1987-02-17 1987-07-14 Procédé et dispositif pour fabriquer la tête d'une soupape

Country Status (4)

Country Link
US (1) US4926534A (fr)
EP (1) EP0279012A1 (fr)
JP (2) JPS63203238A (fr)
DE (1) DE3704948A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5328527A (en) * 1992-12-15 1994-07-12 Trw Inc. Iron aluminum based engine intake valves and method of making thereof
AT2881U1 (de) * 1998-06-08 1999-06-25 Plansee Ag Verfahren zur herstellung eines tellerventiles aus gamma-tial-basislegierungen
KR100425235B1 (ko) * 2001-03-15 2004-03-30 전점실 용접품질관리 콘트롤장치
CN101310915B (zh) * 2007-05-23 2010-06-16 张华文 工程挖掘机履带销套的加工方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH107912A (de) * 1924-01-05 1924-12-01 Kuhne Josef Verfahren und Vorrichtung zur Herstellung von Nieten, Schrauben und andern bolzenförmigen Werkstücken mit Kopf.
US1611967A (en) * 1922-11-15 1926-12-28 Arvin C Webster Method of making valves
DE474316C (de) * 1926-12-25 1929-03-30 William Signius Knudsen Herstellung von Gegenstaenden mit Kopf, insbesondere von Tellerventilen aus hartem Metall
CH446021A (de) * 1965-01-04 1967-10-31 Csavararugyar Maschine zum Herstellen von mit einem Kopf versehenen Bolzen
EP0206235A2 (fr) * 1985-06-18 1986-12-30 Gesenkschmiede Schneider Gmbh Procédé et appareil de refoulement de barres en acier

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1644021A (en) * 1925-04-02 1927-10-04 Gen Motors Corp Method of making poppet valves
US1696646A (en) * 1927-10-08 1928-12-25 Renault Louis Manufacturing of valves and like devices
US2138528A (en) * 1932-02-10 1938-11-29 Eaton Mfg Co Method of forming a valve
US3319321A (en) * 1964-01-10 1967-05-16 Eaton Mfg Co Method of making engine valve
US3536053A (en) * 1967-10-24 1970-10-27 Trw Inc Forged valves from cast slugs
US3636605A (en) * 1967-10-24 1972-01-25 Trw Inc Method of making forged valves from cast slugs
BE867541A (fr) * 1977-06-10 1978-11-27 Dehove Roger M Procede de formage a chaud d'une tete de soupape et dispositif pour sa mise en oeuvre
JPS6092034A (ja) * 1983-10-24 1985-05-23 Toyota Motor Corp エンジンバルブ粗形材の冷温間鍛造方法
JPS60213330A (ja) * 1984-04-09 1985-10-25 Honda Motor Co Ltd 内燃機関用吸，排気弁の製造方法
US4741080A (en) * 1987-02-20 1988-05-03 Eaton Corporation Process for providing valve members having varied microstructure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1611967A (en) * 1922-11-15 1926-12-28 Arvin C Webster Method of making valves
CH107912A (de) * 1924-01-05 1924-12-01 Kuhne Josef Verfahren und Vorrichtung zur Herstellung von Nieten, Schrauben und andern bolzenförmigen Werkstücken mit Kopf.
DE474316C (de) * 1926-12-25 1929-03-30 William Signius Knudsen Herstellung von Gegenstaenden mit Kopf, insbesondere von Tellerventilen aus hartem Metall
CH446021A (de) * 1965-01-04 1967-10-31 Csavararugyar Maschine zum Herstellen von mit einem Kopf versehenen Bolzen
EP0206235A2 (fr) * 1985-06-18 1986-12-30 Gesenkschmiede Schneider Gmbh Procédé et appareil de refoulement de barres en acier

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Publication number Publication date
US4926534A (en) 1990-05-22
JPS63278631A (ja) 1988-11-16
DE3704948A1 (de) 1988-08-25
JPS63203238A (ja) 1988-08-23

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