WO2017072981A1 - 板金製部材の製造方法 - Google Patents

板金製部材の製造方法 Download PDF

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Publication number
WO2017072981A1
WO2017072981A1 PCT/JP2015/082684 JP2015082684W WO2017072981A1 WO 2017072981 A1 WO2017072981 A1 WO 2017072981A1 JP 2015082684 W JP2015082684 W JP 2015082684W WO 2017072981 A1 WO2017072981 A1 WO 2017072981A1
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WO
WIPO (PCT)
Prior art keywords
peripheral side
thickening
inner peripheral
mold
outer peripheral
Prior art date
Application number
PCT/JP2015/082684
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English (en)
French (fr)
Japanese (ja)
Inventor
正輝 西岡
直樹 藤井
国広 原田
麗公 松井
Original Assignee
株式会社カネミツ
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 株式会社カネミツ filed Critical 株式会社カネミツ
Priority to CN201580083234.XA priority Critical patent/CN108025350B/zh
Publication of WO2017072981A1 publication Critical patent/WO2017072981A1/ja

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    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/30—Deep-drawing to finish articles formed by deep-drawing
    • 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
    • B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
    • 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
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/12—Shaping end portions of hollow articles

Definitions

  • the present invention relates to a method for manufacturing a sheet metal member.
  • Patent Document 1 discloses a method of manufacturing a clutch piston.
  • the clutch piston is used for an automatic transmission.
  • the clutch piston has a groove for mounting an O-ring on the inner periphery of the boss.
  • the manufacturing method of a clutch piston disclosed in Patent Document 1 includes a step of forming a boss portion, a step of forming a step portion, a step of forming a boss, and a step of forming an O-ring groove.
  • the step of forming the boss portion is a step of press forming a blank having a thickness equal to the thickness of the main body to form the boss portion at the center.
  • the step of forming the stepped portion is a step of press forming the boss portion and forming the stepped portion at the connection portion with the main body.
  • the step of forming the boss is a step of increasing the wall thickness by constraining the outer shape of the boss portion connected to the stepped portion and press-molding.
  • the step of forming the O-ring groove is a step of machining an O-ring groove forming portion in the boss.
  • the clutch piston manufacturing method disclosed in Patent Document 1 has a problem in that when the thickness of the boss, that is, the tubular portion is increased, the end portion of the tubular portion may be buckled.
  • the clutch piston disclosed in Patent Document 1 there are many members having a cylindrical portion. It is frequently performed that some plastic working is performed on the end of such a cylindrical member along the central axis. When such plastic working is performed, the cylindrical member cannot be used if the end portion is buckled. It is important to avoid such buckling.
  • An object of the present invention is to reduce the possibility that the end portion buckles when the thickness of the end portion of the cylindrical portion is increased.
  • the method for manufacturing the sheet metal member 12 includes a forming material forming step S350, a one-end thickening step S352, and a shaping step S354.
  • the base material forming step S350 is a step in which the base material 10 is formed.
  • the base material 10 includes a cylindrical portion 20.
  • the one-end thickening step S352 is a step in which the one-end thickening molds 40 and 42 are pressed against the one end 26 which is the annular shape of the cylindrical portion 20. Thereby, the one end 26 of the cylindrical part 20 is thickened.
  • the shaping step S354 is a step in which the one end 26 of the cylindrical portion 20 is shaped.
  • One end 26 of the cylindrical portion 20 is increased in thickness at one end thickening step S352.
  • One end thickening molds 40 and 42 are formed with annular grooves 56 and 106.
  • the annular grooves 56 and 106 have groove bottoms 60 and 110, inner peripheral side surfaces 62 and 112, and outer peripheral side surfaces 64 and 114.
  • the distance between the outer peripheral side surfaces 64 and 114 and the inner peripheral side surfaces 62 and 112 decreases as the groove bottoms 60 and 110 are approached.
  • the one end 26 of the cylindrical portion 20 is thickened in the state described below.
  • the state is a state in which the groove bottoms 60 and 110 of the one end thickening molds 40 and 42 are pressed against the one end 26 of the cylindrical portion 20.
  • the distance between the inner peripheral side surfaces 62 and 112 and the outer peripheral side surfaces 64 and 114 of the annular grooves 56 and 106 becomes narrower as the groove bottoms 60 and 110 are approached. Since the space
  • FIG. First, in the one end thickening step S352, when the one end 26 is plastically deformed so as to become thicker away from the end of the one end 26 of the cylindrical portion 20, the one end 26 is made thicker after the one end 26 of the cylindrical portion 20 is uniformly thickened.
  • the possibility of buckling of the one end 26 is reduced. This is because the portion that is likely to buckle easily thickens early in the plastic deformation.
  • the groove bottoms 60 and 110 of the annular grooves 56 and 106 in the one-end thickening molds 40 and 42 are pressed against the one end 26 of the cylindrical portion 20.
  • the buckling is greater than when the one end 26 of the cylindrical portion 20 can be narrowed or expanded in the annular grooves 56 and 106. Is less likely to occur.
  • the thickness of the end portion of the cylindrical portion 20 is increased, the possibility that the end portion buckles can be reduced.
  • the one-end thickening step S352 described above has a slope forming thickening step S370 and an inner peripheral thickening step S372.
  • the slope forming and thickening step S370 is a step of increasing the thickness of the one end 26 of the cylindrical portion 20 by pressing the groove bottom 60 of the slope forming mold 40 against the one end 26 of the cylindrical portion 20. Thereby, inclined surfaces are formed on the inner peripheral side and the outer peripheral side of the one end 26 of the cylindrical portion 20.
  • the slope forming mold 40 is a mold for increasing the thickness of one end that satisfies the following two requirements.
  • the first requirement is that it has an annular groove 56.
  • the outer peripheral side surface 64 and the inner peripheral side surface 62 of the annular groove 56 are inclined.
  • the second requirement is that the inclination of the outer peripheral side surface 64 is gentler than the inclination of the inner peripheral side surface 62.
  • the inner peripheral thickening step S372 is a step of pressing the annular groove 106 of the inner peripheral thickening mold 42 against one end 26 of the cylindrical portion 20 that has been increased in the slope forming thickening step S370. Thereby, the one end 26 of the cylindrical part 20 is thickened so that the one end 26 of the cylindrical part 20 protrudes in the inner peripheral direction.
  • the inner peripheral thickening mold 42 is a one-end thickening mold that satisfies the following two requirements.
  • the first requirement is that it has an annular groove 106.
  • the outer peripheral side surface 114 and the inner peripheral side surface 112 of the annular groove 106 are inclined.
  • the second requirement is that the inclination of the inner peripheral side surface 112 is gentler than the inclination of the inner peripheral side surface 62 of the slope forming mold 40.
  • “inclined” with respect to the outer peripheral side surfaces 64 and 114 of the annular grooves 56 and 106 means one end when the one end thickening mold 40 or 42 is pressed against the one end 26 of the cylindrical portion 20. It means that the advancing direction of the thickening molds 40, 42 and the outer peripheral side surfaces 64, 114 of the annular grooves 56, 106 form an angle. “Inclination” for the outer peripheral side surfaces 64 and 114 of the annular grooves 56 and 106 refers to the size of the corners.
  • “Slow” with respect to the inclination means that the angle formed by the advancing direction of the one-end thickening molds 40 and 42 and the outer peripheral side surfaces 64 and 114 of the annular grooves 56 and 106 is large. “Steep” with respect to the inclination means that the angle formed by the advancing direction of the one end thickening dies 40 and 42 and the outer peripheral side surfaces 64 and 114 of the annular grooves 56 and 106 is small. The same applies to “inclined” and “inclined” of the inner peripheral side surfaces 62 and 112 of the annular grooves 56 and 106.
  • slopes are formed on the inner peripheral side and the outer peripheral side of the one end 26 of the cylindrical portion 20 in the slope formation thickening step S370. Since the inclination of the outer peripheral side surface 64 of the slope forming mold 40 is gentler than the inclination of the inner peripheral side surface 62, the outer peripheral side inclined surface of the one end 26 of the cylindrical portion 20 is gentler than the inner peripheral side inclined surface. Thereby, in slope formation thickness increasing process S370, a slope is formed in the end 26 of the cylindrical part 20 so that an outer peripheral side becomes gentler than an inner peripheral side. Thereafter, in the inner circumferential thickening step S372, the annular groove 106 of the inner circumferential thickening mold 42 is pressed against the one end 26 of the cylindrical portion 20.
  • the inclination of the inner peripheral side surface 112 of the annular groove 106 of the inner peripheral thickening mold 42 is gentler than the inclination of the inner peripheral side surface 62 of the inclined surface forming mold 40.
  • the inner circumferential thickening step S372 the inner circumferential side of the one end 26 of the cylindrical portion 20 in the state where the inclined surfaces are formed in advance on the inner circumferential side and the outer circumferential side is further thickened. Since slopes are formed in advance on the inner peripheral side and the outer peripheral side, the inner peripheral side of the one end 26 of the cylindrical portion 20 is easily projected in the inner peripheral thickening step S372 as compared to the case where it is not. As a result, even when the one end 26 of the cylindrical portion 20 is plastically deformed so as to project to the inner peripheral side, the possibility that the one end 26 buckles can be reduced.
  • the maximum value of the inner diameter of the outer peripheral side surface 114 of the inner peripheral thickening mold 42 described above is not more than the maximum value of the inner diameter of the outer peripheral side surface 64 of the slope forming mold 40.
  • the inclination of the outer peripheral side surface 114 of the inner peripheral thickening mold 42 is the same or steep as the inclination of the outer peripheral side face 64 of the slope forming mold 40.
  • the maximum value of the inner diameter of the outer peripheral side surface 114 of the inner peripheral thickening mold 42 is equal to or less than the maximum value of the inner diameter of the outer peripheral side surface 64 of the inclined surface forming mold 40 and the inclination of the outer peripheral side surface 114 of the inner peripheral thickening mold 42 Is the same or steep as the inclination of the outer peripheral side surface 64 of the slope forming mold 40.
  • the portion closer to the portion where the inner diameter of the outer circumferential side surface 114 of the inner circumferential thickening die 42 is the largest in the one end 26 of the cylindrical portion 20 is closer to the outer circumferential side.
  • the one-end thickening molds 40 and 42 described above have the intermediate punches 70 and 120 and the outer pads 72 and 122.
  • the intermediate punches 70 and 120 integrally form the groove bottoms 60 and 110 of the annular grooves 56 and 106 and the inner peripheral side surfaces 62 and 112 of the annular grooves 56 and 106.
  • the outer pads 72 and 122 are disposed so as to surround the middle punches 70 and 120.
  • the outer pads 72 and 122 constitute the outer peripheral side surfaces 64 and 114 of the annular grooves 56 and 106.
  • the groove bottoms 60 and 110 of the one-end thickening molds 40 and 42 are pressed against the one end 26 of the cylindrical portion 20, thereby causing one end of the cylindrical portion 20 to end. 26 is thickened.
  • the one end thickening molds 40 and 42 receive a reaction force from the tubular portion 20. If the one end thickening molds 40, 42 have the middle punches 70, 120 and the outer pads 72, 122, the reaction force may cause cracks in the groove bottoms 60, 110 of the annular grooves 56, 106. Can be lowered.
  • the intermediate punches 70 and 120 integrally form the groove bottoms 60 and 110 of the annular grooves 56 and 106 and the inner peripheral side surfaces 62 and 112 of the annular grooves 56 and 106.
  • the groove bottoms 60 and 110 and the inner peripheral side surfaces 62 and 112 are integrally formed, the plastic deformation of the one end 26 of the cylindrical portion 20 is suppressed on the inner peripheral side as compared with the case where these are formed by different members. It becomes easy to promote towards.
  • the groove bottoms 60 and 110 and the inner peripheral side surfaces 62 and 112 are integrally formed, the groove bottoms 60 and 110 and the inner peripheral side surfaces 62 and 112 are disposed as compared with the case where they are configured by different members. This is because it is difficult to leave. Since it becomes easy to promote the plastic deformation of the one end 26 of the cylindrical part 20 toward the inner peripheral side, the possibility that the one end 26 buckles can be reduced.
  • the present invention when the thickness of the end portion of the cylindrical portion is increased, the possibility that the end portion buckles can be reduced.
  • FIG. 1 is an external view of a shaped material according to an embodiment of the present invention.
  • 1 is an external view of a sheet metal member according to an embodiment of the present invention. It is a figure showing a process of a manufacturing method of a sheet metal member concerning an embodiment with the present invention. It is sectional drawing which shows the slope formation metal mold
  • FIG. 5 is an enlarged view of FIG. 4. It is sectional drawing which shows the inner periphery thickening metal mold
  • FIG. 7 is an enlarged view of FIG. 6.
  • FIG. 1 It is sectional drawing which shows the bottom part shaping die and raw material in the bottom part shaping process concerning one embodiment of this invention. It is an enlarged view of FIG. It is sectional drawing which shows the finishing metal mold
  • FIG. 1 is an external view of a base material 10 processed by the method for manufacturing a sheet metal member 12 according to the present embodiment.
  • the base material 10 according to the present embodiment includes a cylindrical portion 20 and a flange portion 22.
  • One end 26 of the cylindrical portion 20 is annular.
  • One end 26 of the cylindrical portion 20 is thinner than the other end 28.
  • the flange portion 22 is integrally connected to the other end 28 of the cylindrical portion 20.
  • FIG. 2 is an external view of the sheet metal member 12 according to the present embodiment. In FIG. 2, a part of the sheet metal member 12 is cut away. One end 38 of the sheet metal member 12 is thickened and shaped.
  • the raw material 10 shown in FIG. 1 is processed by the manufacturing method of the sheet metal member 12 according to the present embodiment, so that the sheet metal member 12 shown in FIG. 2 is obtained.
  • a sheet metal member 12 is, for example, a material for a sun gear of a planetary gear mechanism.
  • FIG. 3 is a diagram showing the steps of the method for manufacturing the sheet metal member 12 according to the present embodiment. Based on FIG. 3, the process of the manufacturing method of the sheet-metal member 12 of this embodiment is demonstrated.
  • the manufacturing method of the sheet metal member 12 according to the present embodiment includes a forming material forming step S350, a one-end thickening step S352, and a shaping step S354.
  • the forming material forming step S350 is a step in which the forming material 10 shown in FIG. 1 is formed.
  • the specific procedure for forming the raw material 10 is well known. Therefore, detailed description thereof will not be repeated here.
  • the one end thickening step S352 is a step in which the one end thickening mold is pressed against the one end 26 of the cylindrical portion 20 of the shaped member 10. Thereby, the one end 26 of the cylindrical part 20 is thickened.
  • the one-end thickening mold is a mold having an annular groove.
  • the annular groove has a groove bottom, an inner peripheral side surface, and an outer peripheral side surface. The distance between the outer peripheral side surface and the inner peripheral side surface decreases as the groove bottom is approached.
  • the one end 26 of the cylindrical portion 20 is thickened in the state described below.
  • the state is a state in which the groove bottom of the one end thickening mold is pressed against one end 26 of the cylindrical portion 20.
  • the one-end thickening step S352 includes a slope forming thickening step S370 and an inner peripheral thickening step S372.
  • the slope forming and thickening step S370 is a step of increasing the thickness of the one end 26 of the cylindrical portion 20 by pressing the slope forming mold 40 against the one end 26 of the cylindrical portion 20.
  • the slope forming mold 40 is a kind of mold for thickening one end.
  • FIG. 4 is a cross-sectional view showing the slope forming mold 40 in the slope forming and increasing step S370 according to the present embodiment and the shaped material 10 processed by this.
  • the slope forming mold 40 of the present embodiment will be described.
  • the slope forming mold 40 includes a slope forming upper mold 50 and a slope forming lower mold 52.
  • the slope forming upper mold 50 is pressed against the base material 10 by a well-known drive source (not shown).
  • the slope forming lower mold 52 supports the base material 10 when the slope forming upper mold 50 is pressed against the base material 10.
  • FIG. 5 is an enlarged view of FIG. Based on FIG. 5, the slope forming upper mold 50 according to the present embodiment will be described.
  • the slope forming upper mold 50 has the annular groove 56 described above.
  • the annular groove 56 is pressed against the one end 26 of the cylindrical portion 20.
  • the annular groove 56 has a groove bottom 60, an inner peripheral side surface 62, and an outer peripheral side surface 64.
  • the width of the groove bottom 60 of the annular groove 56 is equal to the thickness of the one end 26 of the tubular portion 20 immediately before the slope formation thickening step S370 within the range of manufacturing errors.
  • both the inner peripheral side surface 62 and the outer peripheral side surface 64 are inclined.
  • the inner peripheral side surface 62 and the outer peripheral side surface 64 are both the angle and the traveling direction of the slope forming upper mold 50 when the slope forming mold 40 is pressed against the one end 26 of the tubular portion 20. I am doing. As a result, the distance between the outer peripheral side surface 64 and the inner peripheral side surface 62 becomes narrower as it approaches the groove bottom 60.
  • the slope forming upper mold 50 includes a slope forming punch 70 and a slope forming outer pad 72.
  • the slope forming punch 70 constitutes the groove bottom 60 of the annular groove 56 and the inner peripheral side surface 62 of the annular groove 56 described above.
  • the slope forming outer pad 72 is disposed so as to surround the punch 70 during slope formation.
  • the slope forming outer pad 72 constitutes the outer peripheral side surface 64 of the annular groove 56 described above.
  • the inclination of the outer peripheral side surface 64 is gentler than the inclination of the inner peripheral side surface 62. That is, in FIG. 5, the angle formed by the alternate long and short dash line 80 and the outer peripheral side surface 64 is larger than the angle formed by the alternate long and short dash line 80 and the inner peripheral side surface 62.
  • the slope forming lower mold 52 includes a slope forming support punch 90 and a slope forming lower pad (not shown).
  • the slope forming support punch 90 is inserted into the base material 10.
  • the slope forming support punch 90 supports the one end 26 of the tubular portion 20 when the slope forming upper die 50 is pressed against the one end 26 of the tubular portion 20. Thereby, compared with the case where there is no slope formation support punch 90, the possibility of the buckling of the shaped member 10 becomes low.
  • the slope formation lower pad sandwiches the flange portion 22 of the base material 10 together with the slope formation outer pad 72. Thereby, the jumping of the shaped member 10 and the deviation of the shaped member 10 in the slope formation thickening step S370 are prevented.
  • the groove bottom 60 first plastically deforms the one end 26 of the tubular portion 20. With the plastic deformation, the one end 26 of the cylindrical portion 20 comes into contact with the inner peripheral side surface 62 and the outer peripheral side surface 64 of the annular groove 56. Further, when the annular groove 56 of the slope forming mold 40 is pressed against the one end 26 of the cylindrical portion 20, the one end 26 of the cylindrical portion 20 is plastically deformed in accordance with the shape of the annular groove 56. As a result, the one end 26 of the cylindrical portion 20 is increased in thickness.
  • the inner peripheral thickening step S372 is a step of pressing the inner peripheral thickening mold 42 against the one end 26 of the tubular portion 20.
  • One end 26 of the cylindrical portion 20 is increased in thickness in the slope forming and increasing step S370. Thereby, the one end 26 of the cylindrical part 20 is thickened so that the one end 26 of the cylindrical part 20 protrudes in the inner peripheral direction.
  • the inner peripheral thickening mold 42 is a kind of one-end thickening mold.
  • FIG. 6 is a cross-sectional view showing the inner peripheral thickening mold 42 and the base material 10 in the inner peripheral thickening step S372 according to the present embodiment.
  • the inner peripheral thickening mold 42 of the present embodiment will be described.
  • the inner peripheral thickening mold 42 has an inner peripheral thickening upper mold 100 and an inner peripheral thickening lower mold 102.
  • the inner peripheral thickening upper die 100 is pressed against the base material 10 by a well-known driving source (not shown).
  • the inner peripheral thickening lower die 102 supports the raw material 10 when the inner peripheral thickening upper die 100 is pressed against the raw material 10.
  • FIG. 7 is an enlarged view of FIG. Based on FIG. 7, the inner peripheral thickening upper mold
  • the inner peripheral thickening upper mold 100 has the annular groove 106 described above. This annular groove 106 is pressed against one end 26 of the cylindrical portion 20.
  • the annular groove 106 has a groove bottom 110, an inner peripheral side surface 112, and an outer peripheral side surface 114.
  • the width of the groove bottom 110 of the annular groove 106 is wider than the thickness of the one end 26 of the cylindrical portion 20 immediately before the inner circumferential thickening step S372.
  • the annular groove 106 is shallower than the annular groove 56 of the slope forming upper mold 50.
  • Both the inner peripheral side surface 112 and the outer peripheral side surface 114 are inclined. That is, in the case of the present embodiment, the inner peripheral side surface 112 and the outer peripheral side surface 14 are both of the inner peripheral thickening die 42 when the inner peripheral thickening die 42 is pressed against the one end 26 of the cylindrical portion 20. It makes an angle with the direction of travel. As a result, the distance between the outer peripheral side surface 114 and the inner peripheral side surface 112 decreases as the groove bottom 110 is approached. In the present embodiment, the inclination of the inner peripheral side surface 112 is gentler than the inclination of the inner peripheral side surface 62 of the slope forming upper mold 50. That is, in FIG.
  • the angle formed by the alternate long and short dash line 80 and the inner peripheral side surface 112 is larger than the angle formed by the alternate long and short dash line 80 and the inner peripheral side surface 62.
  • the maximum value of the inner diameter of the outer peripheral side surface 114 is It is equal to the maximum value of the inner diameter of the outer peripheral side face 64 of the slope forming upper mold 50 (in this embodiment, the inner diameter of the outer peripheral side face 64 at the edge 66 of the annular groove 56) within the range of manufacturing errors.
  • the inclination of the outer peripheral side surface 114 is equal to the inclination of the outer peripheral side surface 64 of the slope-forming upper mold 50 within the range of manufacturing errors.
  • the inner peripheral thickening upper mold 100 includes an inner peripheral thickening middle punch 120 and an inner peripheral thickening outer pad 122.
  • the inner peripheral thickening intermediate punch 120 constitutes the groove bottom 110 of the annular groove 106 and the inner peripheral side surface 112 of the annular groove 106 described above.
  • the inner peripheral thickening outer pad 122 is disposed so as to surround the inner peripheral thickening middle punch 120.
  • the inner peripheral thickening outer pad 122 constitutes the outer peripheral side surface 114 of the annular groove 106 described above.
  • the inner peripheral thickening lower mold 102 has an inner peripheral thickening support punch 130 and an inner peripheral thickening lower pad (not shown).
  • the inner peripheral thickening support punch 130 is inserted into the base material 10.
  • the inner peripheral thickening support punch 130 supports the one end 26 of the cylindrical portion 20 when the inner peripheral thickening upper die 100 is pressed against the one end 26 of the cylindrical portion 20. Thereby, compared with the case where there is no inner periphery thickening support punch 130, the possibility of buckling of the shaped member 10 is reduced.
  • the inner peripheral thickening lower pad sandwiches the flange 22 together with the inner peripheral thickening outer pad 122. Thereby, the jumping of the shaped material 10 and the deviation of the shaped material 10 in the inner peripheral thickening step S372 are prevented.
  • the groove bottom 110 first plastically deforms the one end 26 of the cylindrical portion 20. With the plastic deformation, the one end 26 of the cylindrical portion 20 comes into contact with the inner peripheral side surface 112 and the outer peripheral side surface 114 of the annular groove 106. Further, when the annular groove 106 of the inner peripheral thickening mold 42 is pressed against the one end 26 of the tubular portion 20, the one end 26 of the tubular portion 20 is plastically deformed in accordance with the shape of the annular groove 106. As a result, the one end 26 of the cylindrical portion 20 is plastically deformed so as to protrude toward the inner periphery.
  • the shaping step S354 is a step in which the one end 26 of the cylindrical portion 20 is shaped. One end 26 of the cylindrical portion 20 is increased in thickness at one end thickening step S352.
  • the shaping step S354 includes a bottom shaping step S380 and a finishing step S382.
  • the bottom shaping step S380 is a step of pressing the bottom shaping die 200 against one end 26 of the cylindrical portion 20 that has been thickened in the inner circumferential thickening step S372. Thereby, the location which corresponds to a bottom part among the parts thickened in inner periphery thickening process S372 is shape
  • FIG. 8 is a cross-sectional view showing the bottom shaping die 200 and the base material 10 in the bottom shaping step S380 according to the present embodiment.
  • the bottom shaping die 200 includes a bottom shaping upper die 210 and a bottom shaping lower die 212.
  • the bottom shaping upper mold 210 is pressed against the base material 10 by a known drive source (not shown).
  • the bottom shaping lower mold 212 supports the shaping material 10 when the bottom shaping upper mold 210 is pressed against the shaping material 10.
  • the bottom shaping lower mold 212 shapes a portion corresponding to the bottom of the one end 26 of the tubular portion 20 that has been thickened in the inner circumferential thickening step S372.
  • FIG. 9 is an enlarged view of FIG. Based on FIG. 9, the bottom shaping
  • the bottom shaping upper mold 210 has an annular groove 216.
  • This annular groove 216 is pressed against one end 26 of the cylindrical portion 20.
  • the annular groove 216 has a groove bottom 220, an inner peripheral side surface 222, and an outer peripheral side surface 224.
  • the width of the groove bottom 220 is wider than the thickness of the one end 26 of the tubular portion 20 deformed in the inner peripheral thickening step S372. The distance between the outer peripheral side surface 224 and the inner peripheral side surface 222 decreases as the groove bottom 220 is approached.
  • the bottom shaping upper mold 210 includes a bottom shaping middle punch 226 and a bottom shaping outer pad 228.
  • the bottom shaping middle punch 226 constitutes the groove bottom 220 and the inner peripheral side surface 222 of the annular groove 216 described above.
  • the bottom shaping outer pad 228 is disposed so as to surround the bottom shaping middle punch 226.
  • the bottom shaping outer pad 228 constitutes the outer peripheral side surface 224 of the annular groove 216 described above.
  • the bottom shaping lower mold 212 has a bottom shaping support punch 230 and a bottom shaping lower pad (not shown).
  • the bottom shaping support punch 230 is inserted into the base material 10.
  • the bottom shaping support punch 230 is inserted into the cylindrical portion 20 of the raw material 10 when the bottom shaping upper die 210 is pressed against the raw material 10.
  • the tip of the bottom shaping support punch 230 shapes the portion closest to the other end 28 of the one end 26 of the cylindrical portion 20 that has been thickened in the inner circumferential thickening step S372. Thereby, the part which corresponds to a bottom part among the one ends 26 of the cylindrical part 20 becomes an annular
  • the bottom shaping lower pad sandwiches the flange 22 together with the bottom shaping outer pad 228. Thereby, the jumping of the shaped material 10 and the deviation of the shaped material 10 in the inner peripheral thickening step S372 are prevented.
  • the bottom shaping step S380 when the annular groove 216 of the bottom shaping die 200 and the bottom shaping support punch 230 are pressed against the one end 26 of the cylindrical portion 20, the one end 26 of the cylindrical portion 20 matches these shapes. Plastic deformation. As a result, the portion corresponding to the bottom of the portion thickened in the inner peripheral thickening step S372 is shaped into an annular shape.
  • the finishing step S382 is a step of pressing the finishing mold 240 against the one end 26 of the cylindrical portion 20 that has been thickened in the bottom shaping step S380. Thereby, the part thickened in one end thickening process S352 is shaped in the shape shown by FIG.
  • FIG. 10 is a cross-sectional view showing the finishing mold 240, the base material 10, and the sheet metal member 12 in the finishing step S382 according to the present embodiment.
  • the finishing mold 240 of the present embodiment will be described.
  • the finishing mold 240 has a finishing upper mold 250 and a finishing lower mold 252.
  • the finishing upper mold 250 is pressed against the base material 10 by a known driving source (not shown).
  • the finishing lower mold 252 supports the forming material 10 when the finishing upper mold 250 is pressed against the forming material 10.
  • FIG. 11 is an enlarged view of FIG.
  • the finishing upper mold 250 according to the present embodiment will be described based on FIG.
  • the finishing upper mold 250 has an annular groove 256.
  • the annular groove 256 is pressed against the one end 26 of the cylindrical portion 20.
  • the annular groove 256 has a groove bottom 260, an inner peripheral side surface 262, and an outer peripheral side surface 264.
  • the shape of the inner peripheral surface of the annular groove 256 is the same as the shape of the one end 38 of the sheet metal member 12.
  • the finishing upper mold 250 includes a finishing punch 270 and a finishing outer pad 272.
  • the finishing punch 270 constitutes the groove bottom 260 and the inner peripheral side surface 262 of the annular groove 256 described above.
  • the finishing outer pad 272 is disposed so as to surround the finishing punch 270.
  • the finishing outer pad 272 constitutes the outer peripheral side surface 264 of the annular groove 256 described above.
  • the finishing lower mold 252 according to this embodiment will be described with reference to FIG.
  • the finishing lower mold 252 has a finishing support punch 280 and a finishing lower pad (not shown).
  • the finishing support punch 280 is inserted into the base material 10.
  • the finishing support punch 280 supports one end 26 of the tubular portion 20 when the finishing upper mold 250 is pressed against the shaped member 10.
  • the finishing lower pad sandwiches the flange 22 together with the finishing outer pad 272. Thereby, the jump of the base material 10 and the shift
  • the finishing step S382 when the annular groove 256 of the finishing die 240 and the finishing support punch 280 are pressed against the one end 26 of the cylindrical portion 20, the one end 26 of the cylindrical portion 20 is plastically deformed in accordance with these shapes. To do. As a result, the portion thickened in the one-end thickening step S352 is shaped into the shape shown in FIG.
  • the inner peripheral thickening step S372 in the inner peripheral thickening step S372, the inner peripheral side of the one end 26 of the cylindrical portion 20 in the state where the inclined surfaces are formed in advance on the inner peripheral side and the outer peripheral side is further thickened.
  • the inner periphery of the one end 26 of the tubular portion 20 in the inner peripheral wall thickness increasing step S372 is compared with the case where such a slope is not formed in advance. Sides overhang easily.
  • the one end 26 of the cylindrical portion 20 is plastically deformed so as to project toward the inner peripheral side, the possibility that the one end 26 buckles can be reduced.
  • the maximum value of the inner diameter of the outer peripheral side surface 114 of the inner peripheral thickening mold 42 is equal to the maximum value of the inner diameter of the outer peripheral side surface 64 of the slope forming mold 40 within the range of manufacturing errors.
  • the inclination of the outer peripheral side surface 114 of the inner peripheral thickening mold 42 is the same as the inclination of the outer peripheral side face 64 of the slope forming mold 40 within the range of manufacturing errors.
  • the portion closer to the portion where the inner diameter of the outer circumferential side surface 114 of the inner circumferential thickening die 42 is the largest in the one end 26 of the cylindrical portion 20 is closer to the outer circumferential side.
  • the slope forming mold 40 and the inner peripheral thickening mold 42 have middle punches 70 and 120 and outer pads 72 and 122.
  • the middle punches 70 and 120 integrally form the groove bottom 60 of the annular groove 56 and the inner peripheral side surface 62 of the annular groove 56.
  • the groove bottom 60 and the inner peripheral side surface 62 are integrally formed, the plastic deformation of the one end 26 of the cylindrical portion 20 is promoted toward the inner peripheral side as compared with the case where these are formed by different members. It becomes easy to do. Thereby, possibility that the end 26 of the cylindrical part 20 will buckle can be reduced.
  • One end thickening process S352 is not limited to what has slope formation thickening process S370 and inner circumference thickening process S372.
  • any of those steps may not form a slope at the one end 26 of the tubular portion 20.
  • the shaping step S354 is not limited to the one having the bottom shaping step S380 and the finishing step S382.
  • the specific configuration of the one-end thickening mold is not limited to that described above.
  • the slope forming upper mold 50 may be integrated.
  • the slope forming punch 70 has a part of the groove bottom 60 of the annular groove 56 and the inner peripheral side face 62. You may do it.
  • the slope forming outer pad 72 has a part of the groove bottom 60 remaining.
  • the slope forming lower mold 52 may not have the slope forming support punch 90.
  • the one end 26 of the cylindrical part 20 may be a square ring instead of an annular one.
  • the time when the groove bottoms 60 and 110 of the annular grooves 56 and 106 are pressed against the one end 26 of the cylindrical portion 20 in the one-end thickening step S352 is not particularly limited.
  • the groove bottoms 60 and 110 may be pressed against the one end 26 of the cylindrical portion 20 from the beginning.
  • the groove bottoms 60 and 110 may begin to be pressed against the one end 26 of the cylindrical portion 20 after a while after the one-end thickening molds 40 and 42 contact the one end 26 of the cylindrical portion 20.
  • the one end 26 of the cylindrical part 20 only needs to be thickened while the movement of the one end 26 of the cylindrical part 20 is constrained.
  • the manufacturing method of the sheet metal member 12 according to the present invention may include a step of pressing a mold not having an annular groove against the one end 26 of the cylindrical portion 20 in addition to the one end thickening step S352.
  • the widths of the groove bottoms 60 and 110 of the annular grooves 56 and 106 may be such that the one end 26 of the cylindrical portion 20 immediately before processing the shaped member 10 is fitted. This width does not have to be the same as the thickness of the one end 26 of the cylindrical portion 20 immediately before processing the base material 10. However, the width is preferably as close to the thickness as possible.
  • SYMBOLS 10 Original shape material 12 ... Sheet metal member 20 ... Cylindrical part 22 ... Gutter part 26, 38 ... One end 28 ... Other end 40 ... Slope formation metal mold 42 ... Inner circumference thickening metal mold 50 ... Slope formation upper mold 52 ... Slope forming lower molds 56, 106, 216, 256 ... annular grooves 60, 110, 220, 260 ... groove bottoms 62, 112, 222, 262 ... inner peripheral side surfaces 64, 114, 224, 264 ... outer peripheral side surfaces 70 ... during slope formation Punch 72 ... Slope formation outer pad 80 ... Dash-dotted line 90 ... Slope formation support punch 100 ... Inner peripheral thickening upper die 102 ...

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
PCT/JP2015/082684 2015-10-28 2015-11-20 板金製部材の製造方法 WO2017072981A1 (ja)

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Publication number Priority date Publication date Assignee Title
CN109550809B (zh) * 2018-11-23 2020-03-13 中国航发南方工业有限公司 一种焊接件校正方法及装置
JP7274124B2 (ja) * 2019-04-04 2023-05-16 マツダ株式会社 クランクシャフトの鍛造金型構造及びこれを用いたクランクシャフトの鍛造方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2325480A (en) * 1942-11-19 1943-07-27 Smith Corp A O Apparatus for electrically upsetting pipe ends
JPH079062A (ja) * 1993-04-26 1995-01-13 Yutaka Giken Co Ltd クラッチピストンの製造方法
JP2001038443A (ja) * 1999-07-28 2001-02-13 Kanemitsu:Kk 板金製部材およびその製造方法
JP2008528357A (ja) * 2005-01-24 2008-07-31 オートリブ エーエスピー，インコーポレイティド 超音波溶接されるイニシエータ及びコネクタソケット
US20120169045A1 (en) * 2009-09-10 2012-07-05 Gerd Berghaus Screwed pipe joint and method for the production thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6931906B2 (en) * 2002-03-28 2005-08-23 Eugene Angelo Sorgi Method and apparatus for cold forging a trailer hitch receiving housing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2325480A (en) * 1942-11-19 1943-07-27 Smith Corp A O Apparatus for electrically upsetting pipe ends
JPH079062A (ja) * 1993-04-26 1995-01-13 Yutaka Giken Co Ltd クラッチピストンの製造方法
JP2001038443A (ja) * 1999-07-28 2001-02-13 Kanemitsu:Kk 板金製部材およびその製造方法
JP2008528357A (ja) * 2005-01-24 2008-07-31 オートリブ エーエスピー，インコーポレイティド 超音波溶接されるイニシエータ及びコネクタソケット
US20120169045A1 (en) * 2009-09-10 2012-07-05 Gerd Berghaus Screwed pipe joint and method for the production thereof

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JP6412482B2 (ja) 2018-10-24
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CN108025350B (zh) 2019-07-23

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