WO2016163308A1 - Matrice de forgeage à chaud et procédé de forgeage à chaud - Google Patents

Matrice de forgeage à chaud et procédé de forgeage à chaud Download PDF

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Publication number
WO2016163308A1
WO2016163308A1 PCT/JP2016/060733 JP2016060733W WO2016163308A1 WO 2016163308 A1 WO2016163308 A1 WO 2016163308A1 JP 2016060733 W JP2016060733 W JP 2016060733W WO 2016163308 A1 WO2016163308 A1 WO 2016163308A1
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WIPO (PCT)
Prior art keywords
forging
hot forging
hot
die
forging material
Prior art date
Application number
PCT/JP2016/060733
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English (en)
Japanese (ja)
Inventor
尚史 光永
福井　毅
寺前　俊哉
敏明 野々村
松本　英樹
栄史 下平
聡志 古曵
Original Assignee
日立金属株式会社
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.)
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Publication date
Application filed by 日立金属株式会社 filed Critical 日立金属株式会社
Priority to EP16776475.2A priority Critical patent/EP3281720B1/fr
Priority to JP2016575698A priority patent/JP6108259B2/ja
Priority to ES16776475T priority patent/ES2832499T3/es
Publication of WO2016163308A1 publication Critical patent/WO2016163308A1/fr

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    • 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
    • B21K3/00—Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like
    • B21K3/04—Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like blades, e.g. for turbines; Upsetting of blade roots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/04—Shaping in the rough solely by forging or pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/02—Dies or mountings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/02—Special design or construction
    • B21J7/14—Forging machines working with several hammers
    • 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

Definitions

  • the present invention relates to a hot forging die and a hot forging method.
  • the root portion of the turbine blade is formed by forging a round bar-shaped hot forging material to a desired diameter, and further forming a near-net shape turbine blade material by stamping forging.
  • a desired round bar-shaped rough ground is formed.
  • the root portion is thick (volume is large) and gradually narrows toward the wing tip. Wasteland is shown.
  • a round bar-like hot forging material is radially forged to a desired diameter to obtain a long round bar, cut into a predetermined size, and further free forging. It is forged into the desired wasteland shape with the equipment.
  • bosses When stamping and forging turbine blades, roots, wings, and protrusions called bosses may be provided in the blades of the turbine blades, and volume and dimensional adjustments are important in turbine blade waste. It becomes. If the volume and dimensions are not adjusted sufficiently, the rough surface will not be fully filled in the die carved surface during die forging, and part of the turbine blade material of the near net shape after die forging will be missing. A problem arises. Moreover, since the material of the turbine blade is an Ni-based super heat-resistant alloy or an expensive alloy such as a Ti alloy, a defect occurs in which a part of the turbine blade material of the near net shape after die-cut forging is missing. And the damage is not small.
  • a processing groove called “segiri” at the time of manufacturing the wasteland, and to perform the processing at the time of the rough ground forming so that the die carved surface at the time of stamping forging is fully filled.
  • Patent Document 2 Japanese Patent Application Laid-Open No. 60-250843
  • a special jig is prepared for forming a sledge, and a processing groove is sequentially formed in a round bar-shaped material by a press device.
  • the forging material after squeezing is subjected to hot forging for extending the forging material (hereinafter referred to as forging) so as to obtain a predetermined wasteland shape again with another forging device.
  • JP-A-63-238942 Japanese Patent Laid-Open No. 60-250843
  • Patent Document 2 only the jig for performing the pasting has been improved conventionally, and there is no proposal of a hot forging die suitable for forging performed after the pasting.
  • the shape of the press part shown by patent document 2 is formed in the flat shape, and is unsuitable for forming a desired groove
  • the groove formed by the margin is narrow and narrow in the vertical direction. When grooves perpendicular to the depth direction of the material are formed, the occurrence of fogging becomes a problem during hot forging in which the forging material is extended to the turbine blade length.
  • An object of the present invention is to provide a hot forging die and a hot forging method that can be easily forged using a radial forging machine even for difficult-to-work materials used in turbine blades. It is to be.
  • the present invention is a hot forging die for hot forging a rod-like forging material by radial forging
  • the hot forging die has a pair of halved pressing parts for sandwiching the forging material
  • Each of the half-shaped pressing portions is formed of a surface formed with a concave flat surface, and is formed so as to surround the forging material
  • the half-shaped pressing part has a roughing part and a finishing part
  • the finishing portion is a hot forging die in which the width of the forged material in the longitudinal direction is wider than the width of the rough portion.
  • the half-pressing portion is a hot forging die in which the width gradually increases from the roughing surface toward the finishing surface.
  • the width of the finishing portion is 10 mm or more wider than the width of the rough portion.
  • the said finish process part has a recessed part, and the press surface of the said finish process part may be divided into two or more places by the said recessed part. It is preferable that the hot forging die is for forging for extending the forging material.
  • the present invention is a hot forging method for hot forging a rod-like forging material by radial forging, Having a pair of halved pressing parts for sandwiching the forging material;
  • Each of the half-shaped pressing portions is formed of a surface formed with a concave flat surface, and is formed so as to surround the forging material,
  • the half-shaped pressing part has a roughing part and a finishing part,
  • the finishing portion has a surface width in which the width in the longitudinal direction of the forging material is wider than the width in the rough portion,
  • a forging material heating step for heating the forging material to a hot forging temperature; Hot forging which extends the forging material by rotating the heated forging material while pressing the forging material with the respective half-shaped pressing portions of the two hot forging molds arranged to face each other.
  • Is a hot forging method Preferably, it is a hot forging method in which the rod-like forging material is a Ni-base superalloy or Ti alloy.
  • the hot forging method of the present invention is suitable for manufacturing wasteland for turbine blades.
  • FIG. 1 is a schematic side view of a hot forging die 1 according to the present invention, a cross-sectional view of a finishing portion (DD cross-sectional view) of a hot forging die 1, and a cross-sectional view of a rough processing portion (FF cross-sectional view). And a cross-sectional view (EE cross-sectional view) located between the finish processed portion and the rough processed portion.
  • the radial forging machine pressed from two opposing directions is used.
  • the surface width (width in the longitudinal direction of the forging material) of the pressing portion gradually increases from the surface width W1 at the position shown in the FF sectional view to the surface width W2 at the position shown in the EE sectional view.
  • the width W3 of the flat surface of the pressing portion from the surface width W2 in the EE cross-sectional view to the position (bottom portion) shown in the DD cross-sectional view is substantially the same.
  • the “finished portion” refers to a place having the same width including the position (bottom portion) shown in the DD cross-sectional view.
  • the finishing portion may be a surface in which the forging material is pressed with a flat surface formed into a concave shape, or may be provided with a concave portion as described later.
  • the hot forging dies 1 shown in FIG. 1 are two in one set (a pair). For example, as shown in FIG. 4, the hot forging dies 1 are opposed to each other so as to sandwich the forging material 21, and The pair of two hot forging dies 1 cooperate to perform forging.
  • the place where forging is performed has a half-like pressing portion 2 for sandwiching a forging material (not shown in FIG. 1), and the half-pressing portion is pressed so as to sandwich the forging material.
  • the forging material is gripped by the gripping mechanism provided in the radial forging machine, and the forging material is intermittently rotated. As shown in the schematic side view of FIG.
  • each half-shaped pressing portion 2 includes a plurality of continuous surfaces (a pressing surface serving as a work surface and inclined surfaces on both side surfaces thereof) so as to surround the forging material. It has a continuous convex shape.
  • the forging material is sandwiched between the pressing portions of the two hot forging dies that work together in a halved shape.
  • continuous so as to surround the forging material means a shape in which the periphery of the forging material 21 is surrounded by the roughing portion and the finishing portion as shown in FIG. 4.
  • the half-shaped pressing portion 2 is formed such that a flat surface is formed in a concave shape, and the pressing portion looks like an arc when viewed from the side (a schematic side view of FIG. 1).
  • the half-shaped pressing part 2 has a finishing part 4 and a roughing part 3.
  • the finishing portion 4 is formed around the bottom of the concave shape (arc shape), and the rough processing portion 3 is formed on both sides of the finishing portion (both ends of the concave shape (arc shape)). Then, the distance between the roughing parts widens from the bottom of the finishing part 4 toward the ends of both roughing parts 3, and when the two hot forging dies press the forging material, the forging material Is a shape that can be pressed with a continuous convex shape.
  • the “convex shape” referred to in the present invention refers to a shape when viewed from the direction of each cross-sectional view. That is, it is a cross section when viewed from a direction perpendicular to the longitudinal direction of the forging material.
  • the pressing portion (working surface) that is formed in a convex shape and forges the forging material has a structure in which a flat surface is formed in a concave shape. Therefore, in the present invention, the aforementioned pressing portion (work surface) may be referred to as a “flat pressing portion”.
  • Each of the halved pressing parts 2 includes a roughing part 3 and a flat finishing part 4 having a wider pressing part (width in the longitudinal direction of the forging material) than the roughing part 3. .
  • the pressing portions shown in the above-mentioned patent documents are formed with the same width, changing the contact area is particularly advantageous for forging into a difficult-to-work material.
  • the roughing portion 3 having a small contact area with the forging material is first efficiently forged and then the finishing portion 4 having a width wider than the width of the pressing portion of the roughing portion 3. Efficiently forming the final shape. Therefore, it is preferable that the width of the pressing portion is gradually increased from the width of the pressing portion of the roughing portion 3, and the finishing portion 4 has a finishing surface having a wider pressing portion than the roughing portion. .
  • the shape may not necessarily be a flat shape with almost no unevenness. Therefore, the term “flat” as used in the present invention is sufficient if it includes errors due to overlay welding or machining, and does not have excessive unevenness, and the shape may be determined from an approximate shape. Moreover, since the hot forging die of the present invention has a half-shaped pressing portion, the work surface is a curved surface so as to surround the forging material.
  • the width of the pressing portion of the finishing portion 4 of the present invention (the width in the longitudinal direction of the forging material) is preferably 10 mm or more wider than the width of the pressing portion of the roughing portion 3. This is because by increasing the difference in the contact area, it is possible to increase the amount of processing at the initial stage of forging and to accurately finish a predetermined shape in the latter stage of forging. If the difference in the width between the finished processed portion and the rough processed portion is less than 10 mm, the effect may not be sufficiently obtained, so the difference is set to 10 mm or more. Preferably, it is formed with a difference of 15 mm or more.
  • the inclination ⁇ of the flank formed at a location continuous with the finishing portion 4 has an inclination of 15 ° to 35 °.
  • the flank is a surface formed on the side where the forging material is sent.
  • the flank is transferred to the forging material at the time of forging, and the portion (part A in FIG. 8) transferred at the next forging is forged. This can prevent the occurrence of fogging in the forging material.
  • flank faces are formed on both sides of the finished portion.
  • forging can be performed while reciprocating the forging material. For example, when forging from only one direction, as shown in FIG. 6, a flank may be formed only on the side on which the forging material is sent.
  • the hot forging die 11 used for the staking process includes a staking part 7 for forming a machining groove.
  • the pressing portion for the margin provided in the margin 7 has a cross section of the pressing portion from a rough processing portion (CC, GG cross section) to a finish processing portion (AA, B).
  • CC, GG cross section rough processing portion
  • AA, B finish processing portion
  • -B, EE, and FF cross-section the arc-shaped cross-section is formed so as to have a gradually changing portion where the radius of curvature gradually increases.
  • the barbed portion 7 for staking has a pair of halved pressing portions 12 for sandwiching the forging material.
  • Each halved pressing portion 12 has a continuous convex shape so as to surround the forging material.
  • the split pressing portion 12 includes a rough processing portion 13 having a substantially semicircular cross section and a finishing processing portion 14.
  • Each of the half-shaped pressing portions includes a roughened portion and a convex finished processed portion having a larger radius of curvature than the roughened portion. It should be noted that the radii of curvature of the halved pressing portions from the position of the BB cross section to the position of the AA cross section and from the position of the FF cross section to the position of the EE cross section are the same curvature radius.
  • the basic configuration is the same as the hot forging die suitable for the forging described above, and the hot forging die 11 for setting is also one set (a pair).
  • the forging material is gripped by a radial forging machine so that a set of hot forging dies 11 can work together to form a predetermined groove in the forging material (not shown).
  • the forging material is gripped by the mechanism, and the forging material is rotated.
  • a plurality of squeezing pressing portions 12 may be formed in the longitudinal direction of the forging material. This is because, for example, when machining grooves are formed at two locations at the same time, it is advantageous to improve productivity by forming a plurality of pressing portions 12 for machining in one die. is there.
  • the material of the alloy used for the turbine blade is a difficult-to-work material, and therefore it is preferable to complete the forging in as short a time as possible within a temperature range where hot forging is possible. It is effective to use this simultaneous cutting process at a plurality of locations on a portion that becomes a boss portion provided on a blade portion of the turbine blade.
  • the simultaneous forging at a plurality of locations is possible because the contact area of the pressing portion formed on the hot forging die of the present invention is gradually increased from a small area to a radial area. This could only be realized in combination with a forging machine.
  • the location having the same radius of curvature (FF) including the position (bottom part) shown in the EE sectional view and the AA sectional view. From the position of the cross-sectional view to the position of the EE cross-sectional view, and from the position of the BB cross-sectional view to the position of the AA cross-sectional view) are defined as a finished portion.
  • FIG. 4 is a schematic view showing an example of a radial forging machine.
  • a hot forging die 11 shown in FIG. 2 or 3 is attached to the radial forging machine.
  • One hot forging die 11 is provided on each side of the forging material to sandwich the forging material 21.
  • the forging material 21 is already gripped by the radial forging machine, but the forging material is heated to a predetermined hot forging temperature in a heating furnace (not shown) and attached to the radial forging machine. .
  • the heating temperature varies depending on the material of the forging material.
  • the heating temperature is 950 to 1150 ° C. for a Ni-based superalloy and 800 to 1000 ° C. for a Ti alloy. In addition, it is 900 to 1200 ° C. for precipitation strengthened stainless steel.
  • the forging material has a rod shape.
  • the rod-shaped forging material may be any material that has been adjusted to a predetermined shape by a forging device or a pressing device. If the rod-shaped forging material is a round bar, the diameter of the rough forged portion of the hot forging die 11 can be reduced. It is preferable that it is equivalent to the width between each other.
  • a predetermined round bar-like forging material is attached to a radial forging machine.
  • hot forging while the heated forging material 21 is rotated, two hot forging dies 11 arranged opposite to each other are made into one set (a pair), and the forging material is pressed by each of the half-shaped pressing portions. As a result, a forging process is performed on the forging material.
  • the shape of the hot forging die for performing the setting is as shown in FIG. 2 or FIG.
  • hot forging is started from the rough processed portion 13 of the hot forging die 11.
  • the hot forging die according to the present invention when the interval between the roughing portions widens from the finishing portion 14 toward the roughing portion 13 and the two hot forging dies press the forging material.
  • the forging material has a continuous semi-circular convex shape that can be pressed. Further, in the first margin processing, the forging material rotates on the spot (the forging material does not move in the longitudinal direction). There are two types of processing methods for this margin processing. The first method will be described from a method emphasizing the shape after finishing the barring process. When the hot forging from the two opposite directions is started, first, pressing of the forging material at a predetermined position is started from the roughing portion 13 as shown in FIG. The contact (forging) position between the forging material 21 and the hot forging die during rough machining is indicated by an arrow.
  • a pair of hot forging dies are used to perform forging at four locations (forging process), and the final shape adjustment is performed using a pair of hot forging dies.
  • the shape can be adjusted by forging at several locations. Moreover, it can shape
  • it is convenient when the final finished shape is important.
  • Another method is a method applied when the processing time is short.
  • hot forging from the two opposite directions first, pressing of the forging material at a predetermined position is started from the rough processed portion 13 as shown in FIG.
  • the contact (forging) position between the forging material 21 and the hot forging die during rough machining is indicated by an arrow.
  • the rough-processed part formed in the two hot forging molds that cooperate and forge at the beginning of forging starts pressing, so at the start of forging
  • the finishing portion 14 formed in the pair of hot forging dies is arranged into a predetermined shape.
  • the finishing process used to the bottom of the finishing part is not performed.
  • the finishing process is terminated with four places to be pressed even during the finishing process. Even in this case, it is possible to efficiently form the final shape with the convex finished processed portion 14 having a larger radius of curvature than the rough processed portion, and it is possible to shorten the time by using four pressing points. Gripping can be performed.
  • the radius of curvature of the bottom portion (position shown in the AA cross-sectional view) of the finished portion (the radius of curvature when viewed from the direction perpendicular to the longitudinal direction of the forging material shown in FIG. 8). It is important to make it smaller than the radius of curvature of the diameter after processing. However, it is preferable that the bottom portion of the finished processed portion has a curved surface shape so as to avoid excessive stress concentration during hot forging.
  • the hot forging die 11 is replaced with a hot forging die 1 having a forging press portion.
  • the forging material is reheated to a predetermined forging temperature again.
  • the exchanged hot forging die 1 is provided with an extending portion 5 having a forging press portion for extending the forging material.
  • the forging press portion has the shape shown in FIG.
  • the hot forging die having the forging process shown in FIG. 7A is also used as the shape of the pressing portion of the hot forging die having the pressing portion for forging as viewed from the longitudinal direction of the forging material.
  • the forging material is sequentially moved in the longitudinal direction of the forging material while intermittently rotating by a radial forging machine, sequentially performing hot forging toward the finishing portion, and finishing formed in a pair of hot forging dies. It will be trimmed into a predetermined shape at the processing section. That is, at the final stage of the finishing process, as shown in FIG. 7B, when hot forging is performed in the finishing part 14, there are two pressing points. This method of adjusting to the final shape with the shape of the bottom of the finished portion is advantageous when the final finished shape is important. Further, also in the hot forging by this forging pressing portion, in order to shorten the hot forging time, as shown in FIG. 8, there are four pressing points from the initial stage of hot forging to the final stage of hot forging. By doing so, the forging material can be extended in a short time.
  • the shape shown in FIG. 9 can be obtained.
  • the hot forging die 1 shown in FIG. 9 has a recess 6 formed from the bottom in the width of the finish processing portion 4 (width in the longitudinal direction of the forging material) toward the rough processing portion.
  • the pressing surface of the finishing part is divided into two places.
  • One or more recesses are formed within the width (W3) of the finish processing portion 4, and the pressing surface of the finish processing portion is divided into two or more to more reliably prevent bending of the forging material during forging. it can.
  • the forging material is pressed, a portion pressed by the finishing portion and a portion adjacent to the portion pressed by the finishing portion are not pressed.
  • the cross-section of the forging material may become an ellipse.
  • the forged material that has become an ellipse tends to bend during forging.
  • the pressing surface (finished portion) is divided by the recess, so the forging material rotates intermittently by radial forging at the place where the pressing is first performed. Then, the finish is forged by the next pressing surface. At this time, in the structure shown in FIG.
  • the formation of the concave portion includes the bottom portion of the finishing portion (the portion where the straight line indicated by AA in FIG. 9 is in contact) so that the effect of preventing the bending can be maximized.
  • the forging material can be hot-forged into a predetermined wasteland shape continuously using the same radial forging machine from squeezing to forging, after using a jig for staking as in the past It is possible to omit the complicated process of forging again with another forging machine. Therefore, although the number of reheating times can be reduced, it is possible to manufacture a highly accurate waste for turbine blades.
  • the present invention even a difficult-to-work material used for a turbine blade can be easily forged using a radial forging machine. Further, according to the unprecedented hot forging method using a radial forging machine, the number of reheatings of the forged material can be drastically reduced, productivity is improved, and energy saving is extremely effective.
  • Example 1 A hot forging die 11 shown in FIG. 3 was prepared.
  • the prepared portion 7 of the hot forging die 11 for staking processing has a pair of halved pressing portions 12 for sandwiching the forging material, and each of the halved pressing portions 2 is the forged portion.
  • a convex section having a substantially semicircular cross section that is continuous so as to surround the material 21 is formed, and each of the half-shaped pressing portions 12 has a rough processing portion 13 and a convex shape having a larger radius of curvature than the rough processing portion.
  • a finishing portion 14 A hot forging die 11 shown in FIG. 3 was prepared.
  • the prepared portion 7 of the hot forging die 11 for staking processing has a pair of halved pressing portions 12 for sandwiching the forging material, and each of the halved pressing portions 2 is the forged portion.
  • a convex section having a substantially semicircular cross section that is continuous so as to surround the material 21 is formed, and each of the half-shaped pressing portions 12
  • the curvature radius of the substantially semicircular convex shape of the rough processed portion 13 was 30 mm, and the curvature radius of the substantially semicircular convex shape of the finished processed portion 14 gradually changed to 50 mm.
  • extends the forge raw material 21 after a margin process is a press part formed in flat shape, The shape is It is shown in FIG.
  • the extending portion 5 for forging has a pair of half-shaped pressing portions 2 for sandwiching the forging material, and each half-shaped pressing portion 2 has a continuous convex shape so as to surround the forging material 21,
  • the half-shaped pressing portion 2 has a roughly flat roughened portion 3 and a finished processed portion 4.
  • the width of the pressing portion 5 for forging is such that the roughened portion 3 is 50 mm and the finished portion 4 is changed to 100 mm.
  • the flank face was set at 18 °.
  • the hot forging die has a shape that places importance on the final shape. A pair of the above-mentioned hot forging dies as a pair was attached to a radial forging machine to prepare for hot forging.
  • a forging material for a 50 inch turbine blade was heated in a heating furnace heated to 950 ° C.
  • the forging material was a titanium alloy, and the dimensions were a diameter of 200 mm and a length of 1100 mm.
  • the forging material was taken out of the heating furnace and hot forging was started with a radial forging machine.
  • the forging material was manipulated by gripping with a manipulator.
  • the hot forging first, the forging material is pressed by pressing each of the half-shaped pressing portions of the two hot forging dies 1 arranged opposite to each other while rotating the heated forging material 21.
  • the sashimi processing was performed.
  • the forging material was hot forged into a predetermined shape while rotating the forging material on the spot (without moving the forging material in the longitudinal direction).
  • a mold in which a plurality of half-pressing portions 12 for cutting processing was formed on one mold was used, and two places were simultaneously cut.
  • the hot forging die 1 shown in FIG. the forging material was removed from the radial forging machine and reheated to a predetermined forging temperature again.
  • the forging material was again attached to the radial forging machine, and hot forging by the forging press part was performed.
  • the forging material was sequentially moved in the longitudinal direction while intermittently rotating with a radial forging machine, adjusted to a predetermined shape, and hot forged into a rough land shape.
  • the waste land 22 after hot forging had a shape as shown in FIG. 5 suitable for forming the root portion, the wing portion, and the boss portion.
  • the forging can be hot forged into a predetermined rough ground shape by using a radial forging machine, it is possible to omit a complicated process such as using a jig for staking as in the prior art. For this reason, it has become possible to manufacture a highly accurate waste for turbine blades even though the number of times of reheating can be reduced.
  • Example 2 As Example 2, the effect of the hot forging die in FIG. 9 was confirmed.
  • the width of the forging / pressing portion 5 is such that the roughing portion 3 is mm and the finishing portion 4 is changed to 120 mm, and at the center of the finishing portion.
  • a concave portion having a width of 50 mm is formed, and the pressing surface of the finished processed portion is two.
  • variety of the press surface divided into two was 35 mm, respectively.
  • the hot forging die used for staking was the same as that in Example 1 described above.
  • a forging material for a 50 inch turbine blade was heated in a heating furnace heated to 950 ° C.
  • the forging material was a titanium alloy, and the dimensions were a diameter of 200 mm and a length of 1100 mm.
  • the forging material was taken out of the heating furnace and hot forging was started with a radial forging machine.
  • the forging material was manipulated by gripping with a manipulator.
  • the hot forging first, the forging material is pressed by pressing the forging material with the half-shaped pressing portions of the two hot forging dies 11 arranged opposite to each other while rotating the heated forging material 21.
  • the sashimi processing was performed.
  • the forging material was hot forged into a predetermined shape while rotating the forging material on the spot (without moving the forging material in the longitudinal direction). As shown in FIG.
  • the hot forging die 1 shown in FIG. At this time, the forging material was removed from the radial forging machine and reheated to a predetermined forging temperature again.
  • the hot forging by the forging press part was performed by attaching the forging material to the radial forging machine again after the exchange to the hot forging die 1 having the forging press part.
  • the forging material was sequentially moved in the longitudinal direction while intermittently rotating with a radial forging machine, adjusted to a predetermined shape, and hot forged into a rough land shape.
  • the waste land 22 after hot forging had a shape as shown in FIG. 5 suitable for forming the root portion, the wing portion, and the boss portion.
  • the wasteland after hot forging there were no problems such as fogging.
  • the forging process can be hot forged into a predetermined rough ground shape using a radial forging machine, it is possible to omit a complicated process of marking at the position of the margin as in the prior art. For this reason, it has become possible to manufacture a highly accurate waste for turbine blades even though the number of times of reheating can be reduced.

Abstract

L'invention concerne une matrice de forgeage à chaud et un procédé de forgeage à chaud permettant de réaliser facilement une rétreinte au moyen d'une machine de forgeage radial, même avec des matériaux difficiles à usiner qui sont utilisés pour des aubes de turbine. L'invention concerne une matrice de forgeage à chaud pour le forgeage à chaud d'un matériau de forgeage en forme de tige par forgeage radial, la matrice de forgeage à chaud comprenant une paire de demi-parties de pression permettant d'intercaler ledit matériau de forgeage. Chaque demi-partie de pression est composée d'une surface fabriquée par la formation d'une surface plane sous une forme concave et est formée de manière à entourer le matériau de forgeage. Chaque demi-partie de pression comprend une partie d'usinage grossier et une partie d'usinage de finition. La largeur de la partie d'usinage de finition dans le sens de la longueur du matériau de forgeage est supérieure à la largeur de la partie d'usinage grossier.
PCT/JP2016/060733 2015-04-06 2016-03-31 Matrice de forgeage à chaud et procédé de forgeage à chaud WO2016163308A1 (fr)

Priority Applications (3)

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EP16776475.2A EP3281720B1 (fr) 2015-04-06 2016-03-31 Matrice de forgeage à chaud et procédé de forgeage à chaud
JP2016575698A JP6108259B2 (ja) 2015-04-06 2016-03-31 熱間鍛造用金型及び熱間鍛造方法
ES16776475T ES2832499T3 (es) 2015-04-06 2016-03-31 Matriz de forjado en caliente y procedimiento de forjado en caliente

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JP2015077338 2015-04-06
JP2015-077338 2015-04-06

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WO2016163308A1 true WO2016163308A1 (fr) 2016-10-13

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KR101946300B1 (ko) * 2018-05-17 2019-02-11 주식회사 대동 자동차 현가장치용 스테인레스 볼스터드 제조방법

Citations (4)

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JPS535056A (en) * 1976-07-05 1978-01-18 Kobe Steel Ltd Method of forming shaft blank with flange* back cutting jig used therefor and device for forming same
JPS55136535A (en) * 1979-04-10 1980-10-24 Sumitomo Metal Ind Ltd Roughening method in die forging
JPS561236A (en) * 1979-06-18 1981-01-08 Nippon Steel Corp Production of rough shape billet by forging
JPH07185725A (ja) * 1993-12-28 1995-07-25 Daido Steel Co Ltd ロールとその製造方法

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US611574A (en) * 1898-09-27 Die fob and method of swaging metallic balls
AT320383B (de) * 1973-05-17 1975-02-10 Gfm Fertigungstechnik Werkzeug für Durchlaufschmiedemaschinen
JPS60250843A (ja) * 1984-05-28 1985-12-11 Daido Steel Co Ltd 背切り加工用の刃
JP3208818B2 (ja) * 1992-02-28 2001-09-17 石川島播磨重工業株式会社 プレス用金型およびプレス方法
RU2220020C1 (ru) * 2002-04-04 2003-12-27 Открытое акционерное общество "Чепецкий механический завод" Способ изготовления поковок преимущественно из металлов и сплавов подгруппы титана и ковочный комплекс для его осуществления
PL2149411T3 (pl) * 2008-07-29 2012-02-29 Magna Powertrain Ag & Co Kg Młotek do kucia na kowarce

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS535056A (en) * 1976-07-05 1978-01-18 Kobe Steel Ltd Method of forming shaft blank with flange* back cutting jig used therefor and device for forming same
JPS55136535A (en) * 1979-04-10 1980-10-24 Sumitomo Metal Ind Ltd Roughening method in die forging
JPS561236A (en) * 1979-06-18 1981-01-08 Nippon Steel Corp Production of rough shape billet by forging
JPH07185725A (ja) * 1993-12-28 1995-07-25 Daido Steel Co Ltd ロールとその製造方法

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EP3281720B1 (fr) 2020-09-02
ES2832499T3 (es) 2021-06-10
EP3281720A4 (fr) 2018-12-19
EP3281720A1 (fr) 2018-02-14
JP6108259B2 (ja) 2017-04-05
JPWO2016163308A1 (ja) 2017-05-25

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