US20060144118A1 - Method for manufacturing disk member - Google Patents

Method for manufacturing disk member Download PDF

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Publication number
US20060144118A1
US20060144118A1 US10/547,154 US54715404A US2006144118A1 US 20060144118 A1 US20060144118 A1 US 20060144118A1 US 54715404 A US54715404 A US 54715404A US 2006144118 A1 US2006144118 A1 US 2006144118A1
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United States
Prior art keywords
boss
burring
die
disk member
area
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.)
Abandoned
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US10/547,154
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English (en)
Inventor
Takashi Nakata
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.)
Taiho Kogyo Co Ltd
Original Assignee
Taiho Kogyo Co Ltd
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Publication date
Application filed by Taiho Kogyo Co Ltd filed Critical Taiho Kogyo Co Ltd
Assigned to TAIHO KOGYO CO., LTD. reassignment TAIHO KOGYO CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NAKATA, TAKASHI
Publication of US20060144118A1 publication Critical patent/US20060144118A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B27/1036—Component parts, details, e.g. sealings, lubrication
    • F04B27/1054—Actuating elements
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/26—Making other particular articles wheels or the like
    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • 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
    • B21K1/28—Making machine elements wheels; discs
    • B21K1/32—Making machine elements wheels; discs discs, e.g. disc wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/0804—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B27/0821—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block component parts, details, e.g. valves, sealings, lubrication
    • F04B27/086—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block component parts, details, e.g. valves, sealings, lubrication swash plate

Definitions

  • the present invention relates to a method of manufacturing a disk member, and more particularly, to a method of manufacturing a disk member which is preferred for use as a swash plate of a swash plate compressor, for example.
  • a method of manufacturing a disk member which is used for a swash plate of a swash plate compressor is known in the art (see patent literature 1, for example).
  • a disk member 1 is manufactured by manufacturing steps shown in FIG. 4 . Specifically, a through-opening Wa is initially formed through the center of a plate-shaped raw material W in the form of a disk, as shown in FIG. 4 ( a ). A burring operation is then applied to the margin of the through-opening Wa to cause the margin to rise upward to its feet to shape a burring area Wb in the form of a truncated cone, as shown in FIG. 4 ( b ).
  • a punch 4 is then passed through the inside of the burring area Wb, as shown in FIG. 5 , and the burring area Wb is strongly compressed from above and from below in the axial direction between an upper die 5 and a lower die 6 , thus causing a plastic deformation of the burring area around the through-opening Wa to form a boss WB having a greater wall thickness than the original wall thickness t of the plate-shaped raw material W (see FIGS. 4 ( c ) and 5 ).
  • This operation also forms a body WA extending radially outward and continuing from the boss WB.
  • This step is referred to as a “swaging step” in the art.
  • the boss WB has a top surface WB′ which is swollen upwardly of the upper surface of the original plate-shaped raw material W and a bottom surface WB′′ which is slightly raised relative to the lower surface of the original plate-shaped raw material W.
  • a pair of upper and lower press dies are used to shape the margin of the boss WB by a finishing operation, thus manufacturing the disk member 1 as a final product (see FIG. 4 ( d )).
  • Patent literature 1 Japanese Laid-Open Patent Application No. 2002-239663.
  • the pressing surface (lower surface) of the upper die 5 is formed with an annular recess 5 A which is to be filled by a top portion of the burring area Wb while the pressing surface (upper surface) of the lower die 6 is formed with an annular projection 6 A which is to pound up a bottom portion of the burring area Wb.
  • the distal end (top end) of the burring area Wb is placed into the annular recess 5 A of the upper die 5 while the base (bottom end) of the burring area Wb is supported by the annular projection 6 A of the lower die 6 , and under this condition, the upper die 5 is lowered to cause a plastic deformation of the burring area Wb between the annular recess 5 A of the upper die 5 and the annular projection 6 A as well as an inwardly adjacent annular recess 6 B of the lower die 6 to fill therebetween.
  • the burring area Wb is in the form of a truncated cone which is tapered upwardly and that the shaping process takes place in a manner such that the boss WB assumes a position subsequent to the swaging step which is raised upwardly of the upper surface of the original plate-shaped raw material W ( FIG. 4 ( d )).
  • the boss is formed so as to project above the body in the same direction as the direction in which the burring area is caused to rise to its feet.
  • the burring area Wb moves more easily in the radially outward direction than into the annular recess 5 A of the upper die 5 (see FIG. 5 ), and it is found that this explains for a failure of filling the annular recess 5 A of the upper die 5 up to its corner 5 A′ during the plastic deformation of the burring area Wb.
  • the present invention relates to a method of manufacturing a disk member comprising a piercing step of forming a through-opening centrally through a plate-shaped raw material, a burring step of causing the margin of through-opening of the plate-shaped raw material to rise to its feet toward one side thereof to form a substantially cylindrical burring area, and a forging step of causing the burring area to undergo a plastic deformation to form a cylindrical boss and a disk-shaped body which is located outwardly of the boss; in which at least one end of the cylindrical boss is formed to project beyond the end face of the body which is located on the opposite side from the direction in which the burring area is caused to rise to its feet.
  • one end of the cylindrical boss is formed so as to project in the opposite direction from the direction in which the burring area is caused to rise to its feet, and accordingly the burring area which undergoes a plastic deformation is less susceptible to a movement in the radially outward direction.
  • FIG. 1 (a) is a view of a manufacturing step of a first embodiment according to the present invention; (b) is a view of a manufacturing step which follows (a); (c) is a view of a manufacturing step which follows (b); and (d) is a view of a manufacturing step which follows (c);
  • FIG. 2 is a cross section of an upper die, a lower die and a plate-shaped raw material which are used in the manufacturing step shown in FIG. 1 (c);
  • FIG. 3 is a cross section of a disk member which is completed as a final product by the manufacturing steps shown in FIG. 1 ;
  • FIG. 4 (a) is a view of a manufacturing step used in the prior art; (b) is a view of a manufacturing step which follows (a); (c) is a view of a manufacturing step which follows (b); and (d) is a view of a manufacturing step which follows (c);
  • FIG. 5 is a cross section of an upper die, a lower die and a plate-shaped raw material used in the step shown in FIG. 4 ( c );
  • FIG. 6 is a cross section, to an enlarged scale, of an essential part of a disk member 1 manufactured according to the prior art
  • FIG. 7 (a) is a view of a manufacturing step according to a second embodiment of the present invention. and (b) is a view of a manufacturing step which follows (a);
  • FIG. 8 is a cross section, to an enlarged scale, of an essential part of a disk member manufactured by the manufacturing steps shown in FIG. 7 ;
  • FIG. 9 (a) is a view of a manufacturing step according to a third embodiment of the present invention. and (b) is a view of a manufacturing step which follows (a);
  • FIG. 10 is a cross section, to an enlarged scale, of an essential part of a disk member manufactured by the manufacturing steps shown in FIG. 9 ;
  • FIG. 11 (a) is a view showing an manufacturing step according to a fourth embodiment of the present invention, and (b) is a view of a manufacturing step which follows (a);
  • FIG. 12 is a cross section, to an enlarged scale, of an essential part of a disk member manufactured by the manufacturing steps shown in FIG. 11 ;
  • FIG. 13 is a cross section of an essential part of a disk member manufactured by another embodiment of the present invention.
  • FIG. 14 is a cross section of an essential part of a disk member manufactured according to a further embodiment of the present invention.
  • FIG. 1 shows steps for manufacturing a disk member 1 in accordance with the present invention.
  • the disk member 1 as a final product manufactured according to the present embodiment will be described first.
  • the disk member 1 of the present embodiment is intended to be used as a swash plate of a swash plate compressor.
  • the disk member 1 comprises a centrally located, substantially cylindrical boss 1 B having an increased wall thickness, and a disk-shaped body 1 A continuing from the boss 1 B and extending radially outward.
  • the boss 1 B has a wall thickness t 1 (axial size) which is greater than the wall thickness t 2 of the body 1 A or the sheet thickness T of the original plate-shaped raw material W shown in FIG. 1 .
  • a lower surface 1 a which represents a lower end of the boss 1 B projects downwardly beyond the lower surface 1 b of the body 1 A.
  • the boss 1 B is centrally formed with a vertically extending through-opening 1 F.
  • the boss 1 B has a size difference between an external diameter and an internal diameter of the lower surface 1 a or a radial size t 3 , which is chosen substantially equal to the wall thickness t 1 of the boss 1 B.
  • the lower surface 1 a of the boss 1 B projects downwardly beyond the lower surface of the original plate-shaped raw material W or the lower surface 1 b of the body 1 A.
  • a boundary 1 C between the lower surface 1 b of the body 1 A and the boss 1 B is shaped to be arcuate in section.
  • a boundary 1 D between the top surface 1 d of the body 1 A and the top surface 1 e of the boss 1 B is shaped to be a shallow annular recess.
  • the disk member 1 is intended to be used as a swash plate of a swash plate compressor, and an attachment is fitted into the through-opening 1 F in the boss 1 B while either top surface 1 d or lower surface 1 b of the body 1 A is disposed in sliding contact with a semi-spherical shoe.
  • a plate-shaped raw material W which is cut into a circular form is provided, as shown in FIG. 1 ( a ).
  • the plate-shaped raw material W has an external diameter D′ and a sheet thickness T which are chosen to be equal to the external diameter D of the body 1 A of the disk member 1 as a final product shown in FIG. 3 and the wall thickness t 2 of the body 1 A.
  • An inexpensive hot rolled steel sheet such as S45C, for example, is preferred for the plate-shaped raw material W.
  • a through-opening Wa having a required internal diameter is pierced centrally in the plate-shaped raw material W ( FIG. 1 ( a )).
  • the through-opening Wa is circular in configuration, and has a center which coincides with the center of the plate-shaped raw material W.
  • the piercing step which forms the through-opening Wa in the plate-shaped raw material W may take place by a laser cutting operation or a press stamping operation, but the press stamping operation is preferred for purpose of mass production.
  • this burring step takes place by using a die, not shown, having a guide opening of a greater diameter than the diameter of the through-opening Wa of the plate-shaped raw material W and disposed thereabove and an elevatable rod-shaped punch, not shown, which is disposed below the through-opening Wa in the plate-shaped raw material W.
  • a die not shown
  • an elevatable rod-shaped punch not shown
  • the entire circumferential area of the margin of the through-opening Wa is caused to rise to its feet upwardly, as shown in FIG. 1 ( b ), thus forming a sleeve-shaped burring area Wb in the form of a truncated cone which is tapered upwardly and a body 1 A which is disposed radially outward thereof.
  • the inner periphery Wb′ of the burring area Wb has an internal diameter which is on the order of twice the internal diameter of the original through-opening Wa.
  • the inner periphery of the burring area Wb has a top end which is tapered, gradually decreasing the diameter.
  • an arrangement is made so that at the end of the burring step, the internal diameter D 1 at the top end of the inner periphery Wb′ coincides with the internal diameter of a through-opening 1 F in the boss 1 B of the disk member 1 as a final product.
  • cracks in the folded portions can be prevented from occurring by merely applying a lubricant to the die or the punch or directly applying a lubricant to the margin of the through-opening Wa.
  • the margin of the through-opening Wa may be softened as by annealing prior to the burring step.
  • the operation transfers to a swaging (forging) operation.
  • the swaging (forging) step takes place by using an upper die 5 and a lower die 6 which have their pressing surfaces disposed in opposing relationship and a punch 4 which is passed through the burring area Wb to support it, as shown in FIG. 2 .
  • the inner periphery Wb′ of the burring area Wb is supported by the punch 4 , and under this condition, the lower die 6 is fixed at a given elevation while the upper die 5 is lowered by elevating means, not shown.
  • the cross-sectional configurations of the pressing surfaces of the upper die 5 and the lower die 6 used in the present embodiment are formed in a manner opposite to the conventional arrangement.
  • the pressing surface (lower surface) of the upper die 5 is formed with an annular projection 5 A which bulges toward the lower die 6 located therebelow, whereby an annular recess 5 B is formed at a location adjacent to and located inwardly thereof.
  • the annular projection 5 A has a diameter which is slightly less than the external diameter of the top end of the burring area Wb.
  • the pressing surface (top surface) of the lower die 6 is formed with an annular recess 6 A.
  • the annular recess 6 A has an internal diameter which is slightly greater than the external diameter of bottom end portion Wb′′ which represents the base of the burring area Wb′.
  • the annular projection 5 A on the upper die 5 abuts against the top end of the burring area Wb while the plate-shaped raw material W is supported by the pressing surface (top surface) of the lower die 6 , and further compresses the burring area Wb downward. At this time, the burring area Wb is supported from the inside by the punch 4 .
  • the cross-sectional configurations of the pressing surfaces of the upper die 5 and the lower die 6 of the present embodiment are chosen to be opposite from those in a conventional arrangement, there is no displacement of the burring area Wb radially outward as the upper die 5 is lowered to cause a plastic deformation of the burring area Wb, allowing the annular recess 6 A in the lower die 6 to be easily filled ( FIG. 2 ). In addition, the top end of the burring area Wb is easily filled into the annular recess 5 B in the upper die 5 .
  • a cylindrical boss 1 B having a lower surface 1 a and an upper surface 1 e which are annular flat surfaces disposed orthogonal to the axis and a body 1 A which is disposed outwardly thereof, and the boss 1 B is formed projecting beyond the lower surface of the plate-shaped raw material W (or the lower surface of the body 1 A).
  • the lower surface 1 a of the boss 1 B which represents the bottom end is formed so as to project downwardly beyond the lower surface 1 b of the body 1 A, which is disposed on the opposite side from the direction in which the burring area Wb is caused to rise to its feet, while the upper surface 1 e is formed so as to be recessed below the upper surface 1 d of the body 1 A.
  • a boundary region 1 D which is formed by a shallow annular groove conforming to the cross-sectional configuration of the annular projection 5 A of the upper die 5 is formed at a location adjacent to and outward of the upper surface 1 e of the boss 1 B.
  • an arcuate boundary region 1 C which conforms to the cross-sectional configuration of the edge of the annular recess 6 A of the lower die 6 is formed at a boundary between the lower surface 1 a of the boss 1 B and the body 1 A which is disposed outwardly thereof. Because the inner periphery of the boss 1 B is supported by the punch 4 , a through-opening 1 F is shaped which has a uniform internal diameter over the entire axial extent thereof. Finally, the boss 1 B has a wall thickness t 1 , which is greater than the wall thickness t 2 of the body 1 A.
  • the plate-shaped raw material W is shaped into substantially the same configuration as the disk member 1 as a final product which is shown in FIG. 3 . It is to be noted that during the swaging step, the outer peripheral surface and the upper and the lower surface of the body 1 A may be supported by necessary support means which are disposed in a surrounding relationship so as to constrain the outer peripheral surface of the body 1 A.
  • the boss 1 B may also be formed by utilizing the upper die 5 , the lower die 6 and the burring area Wb which are disposed in an inverted manner from the illustration of FIG. 2 . If the swaging operation takes place under this condition, it is possible to form the boss 1 B having one axial end which projects in a direction opposite from the direction in which the burring area Wb is caused to rise to its feet.
  • the operation transfers to a finishing step.
  • the finishing step press operations are applied to portions adjacent to and outward of the boss 1 B in a concentrated manner using metal molds, not shown, and when the finishing step is completed, the boundary region 1 C is shaped to be more strongly arcuate in section to form an annular groove having a shallow depth which surrounds the boss 1 B, as shown in FIG. 1 ( d ), and thus the disk member 1 is shaped so as to be equivalent to a completed product shown in FIG. 3 .
  • the finishing step can be omitted.
  • the lower surface 1 b and the upper surface 1 d of the body 1 A of the disk member 1 which provide sliding surfaces with respect to a semi-spherical shoe or a piston are subject to a surface roughening, and the disk member 1 is chamfered at required locations and a surface coating is applied as required to complete the disk member 1 as the final product ( FIG. 3 ).
  • the upper die 5 and the lower die 6 which are used in the swaging operation shown in FIGS. 1 ( c ) and 2 are formed in the manner mentioned above, and the upper die 5 is lowered for operation. Accordingly, during a plastic deformation of the burring area Wb which occurs between the annular projection 5 A of the upper die 5 and the annular recess 6 A of the lower die 6 , the burring area Wb is less susceptible to a movement in the radially outward direction, and accordingly, the burring area which undergoes a plastic deformation is completely filled into the annular recess 5 B of the upper die 5 and the annular recess 6 A of the lower die 6 .
  • the lower surface 1 a of the boss 1 B which represents the bottom end is formed so as to project below the lower surface 1 b of the body 1 A.
  • the lower surface 1 a of the boss 1 B which is located on the opposite side from the direction in which the burring area Wb is caused to rise to its feet is formed so as to project beyond the lower surface 1 b of the body 1 A which is located outwardly thereof.
  • FIG. 7 shows a second embodiment of the present invention.
  • the cross-sectional configurations of the pressing surfaces of the upper die 5 and the lower die 6 used in the swaging step as shown in FIG. 7 ( a ) are changed, whereby the cross-sectional configurations of the boss 1 B and associated parts are different from those of the first embodiment shown in FIG. 1 ( c ). Since the piercing step for the plate-shaped raw material W and the subsequent burring step remain the same as in the first embodiment, related Figures and corresponding description are omitted.
  • the upper die 5 , the lower die 6 and the punch 4 which are similar to those shown in FIG. 2 are used to compress the burring area Wb in the axial direction to form the boss 1 B.
  • the lower surface 1 a of the boss 1 B which represents the bottom end is formed so as to project below the body 1 A, thus on the opposite side from the direction in which the burring area Wb is caused to rise to its feet ( FIG. 7 ( a )).
  • the upper surface 1 e of the boss 1 B is recessed below the upper surface 1 d of the body 1 A.
  • the swaging step also shapes the through-opening 1 F.
  • the upper boundary region 1 D is shaped so as to be gently tapered
  • the lower boundary region 1 C is also shaped to be tapered.
  • finishing steps takes place in the similar manner as in the first embodiment to shape the junction between the boundary region 1 C and a lower surface 1 b into an arcuate configuration ( FIG. 7 ( b )).
  • a chamferring, a surface roughening, and a coating are applied at required locations in the similar manner as in the first embodiment to complete the steps of manufacturing the disk member 1 as a final product ( FIG. 8 ).
  • the second embodiment described above is capable of achieving a similar functioning and effects as in the first embodiment.
  • FIG. 9 shows a third embodiment of the present invention.
  • the boss 1 B and associated parts have different cross-sectional configurations from those in the first embodiment shown in FIG. 1 ( c ).
  • the piercing step and the burring step which take place with respect to the plate-shaped raw material W remain unchanged from the first embodiment, and therefore will not be described.
  • the burring area Wb is compressed axially to form the boss 1 B ( FIG. 9 ( a )).
  • the boss 1 B has an upper surface 1 e which is coplanar with an upper surface 1 d of the body 1 A and a lower surface 1 a which projects downwardly of the lower surface 1 b of the body 1 A on the opposite side from the direction in which the burring area Wb is caused to rise to its feet. Accordingly, a through-opening 1 F is shaped during the swaging step, and a lower boundary region 1 C is shaped to be tapered.
  • a finishing step takes place in the similar manner as in the first embodiment, shaping a junction between the boundary region 1 C and a lower surface 1 b into an arcuate configuration ( FIG. 9 ( b )).
  • a boundary region 1 D is formed which comprises an annular groove having a shallow depth and representing a boundary between the upper surface 1 e of the boss 1 B and the upper surface 1 d of the body 1 A.
  • a chamferring, a surface roughening and a coating are applied at required locations in the similar manner as in the first embodiment, completing the steps of manufacturing the disk member 1 as a final product ( FIG. 10 ).
  • the third embodiment is capable of achieving a similar functioning and effects as in the first embodiment.
  • FIG. 11 shows a fourth embodiment of the present invention.
  • the boss 1 B and associated parts have cross-sectional configurations which are different from those shown in the first embodiment illustrated in FIG. 1 ( c ).
  • the piercing step and the burring step which take place with respect to the plate-shaped raw material W remain unchanged from the first embodiment, and therefore will not be described.
  • an upper die 5 which is similar to a conventional one shown in FIG. 5
  • a lower die 6 and a punch 4 which are identical with those shown in FIG. 2 are used to compress the burring area Wb axially to form a boss 1 B ( FIG. 11 ( a )).
  • the swaging step shapes a through-opening 1 F and shapes an upper boundary region 1 D into an arcuate configuration as viewed in section, and also shapes a lower boundary region 1 C to be arcuate in section.
  • a chamferring, a surface roughening and a coating are then applied to required locations in the similar manner as in the first embodiment to complete the steps of manufacturing the disk member 1 as a final product ( FIG. 12 ).
  • the fourth embodiment is capable of achieving a similar functioning and effects as in the first embodiment.
  • FIGS. 13 and 14 show disk members 1 having different cross-sectional configurations which are manufactured according to other embodiments of the present invention.
  • an upper boundary region 1 D has a cross-sectional configuration which is arcuate in the similar manner as in the first embodiment while a lower boundary region 1 C is shaped to be tapered.
  • the arrangement is identical with the disk member 1 of the first embodiment, and disk member 1 is manufactured by similar manufacturing steps as used in the first embodiment.
  • the both boundary regions 1 C and 1 D of the disk member 1 are arcuate in section.
  • the arrangement is similar to the disk member 1 of the first embodiment shown in FIG. 3 , and the disk member 1 is manufactured by similar manufacturing steps as used in the first embodiment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Forging (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US10/547,154 2003-06-13 2004-05-28 Method for manufacturing disk member Abandoned US20060144118A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2003-169855 2003-06-13
JP2003169855A JP3617519B2 (ja) 2003-06-13 2003-06-13 ディスク部材の製造方法
PCT/JP2004/007358 WO2004110668A1 (ja) 2003-06-13 2004-05-28 ディスク部材の製造方法

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US (1) US20060144118A1 (ja)
JP (1) JP3617519B2 (ja)
KR (1) KR100647512B1 (ja)
HU (1) HU229111B1 (ja)
WO (1) WO2004110668A1 (ja)

Cited By (3)

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US20050284203A1 (en) * 2004-06-24 2005-12-29 Kato Seisakusho Co., Ltd. Pressed work and manufacturing method thereof
US20090282885A1 (en) * 2008-05-16 2009-11-19 Masakazu Ooka Method of forming spring washer blind-holes into a piston for an automobile transmission
US20140215821A1 (en) * 2008-03-03 2014-08-07 Ntn Corporation Swash plate of a swash plate type compressor and the swash plate type compressor

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DE102005036228A1 (de) * 2005-08-02 2007-02-08 Schaeffler Kg Taumelscheibengetriebe, insbesondere für eine Axialkolbenpumpe
JP4328372B2 (ja) * 2007-09-07 2009-09-09 株式会社ピーエヌ コアメタルの製造方法とコアメタルとインジェクションギヤ
US8424407B2 (en) 2009-05-20 2013-04-23 Kabushiki Kaisha Pn Core metal and injection gear, and process for manufacturing core metal
KR101433675B1 (ko) 2013-11-07 2014-08-27 한국기계연구원 언더 드라이브 브레이크 피스톤 제조용 냉간 단조금형
JP6849212B2 (ja) * 2016-11-24 2021-03-24 株式会社カネミツ 金属製部材の製造方法
JP6284666B1 (ja) * 2017-03-17 2018-02-28 日新製鋼株式会社 ハードディスク用スペーサー部品の製造方法
JP2019042774A (ja) * 2017-09-04 2019-03-22 株式会社ナカヒョウ プレス成形品の製造方法
JP7230828B2 (ja) * 2017-12-28 2023-03-01 日本製鉄株式会社 環状部品のプレス成形方法
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HUP0600112A2 (en) 2007-07-30
HU229111B1 (en) 2013-08-28
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