EP3456429B1 - Procédé de forgeage et appareil de forgeage - Google Patents

Procédé de forgeage et appareil de forgeage Download PDF

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Publication number
EP3456429B1
EP3456429B1 EP16891733.4A EP16891733A EP3456429B1 EP 3456429 B1 EP3456429 B1 EP 3456429B1 EP 16891733 A EP16891733 A EP 16891733A EP 3456429 B1 EP3456429 B1 EP 3456429B1
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EP
European Patent Office
Prior art keywords
workpiece
plate
pressing
fixing
shaping
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.)
Active
Application number
EP16891733.4A
Other languages
German (de)
English (en)
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EP3456429A1 (fr
EP3456429A4 (fr
Inventor
Yang Il Park
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.)
Bcgen Co Ltd
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Bcgen Co Ltd
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Filing date
Publication date
Application filed by Bcgen Co Ltd filed Critical Bcgen Co Ltd
Publication of EP3456429A1 publication Critical patent/EP3456429A1/fr
Publication of EP3456429A4 publication Critical patent/EP3456429A4/fr
Application granted granted Critical
Publication of EP3456429B1 publication Critical patent/EP3456429B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/003—Simultaneous forming, e.g. making more than one part per stroke
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/08—Dies with different parts for several steps in a process
    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding
    • B21D39/031—Joining superposed plates by locally deforming without slitting or piercing
    • B21D39/032—Joining superposed plates by locally deforming without slitting or piercing by fitting a projecting part integral with one plate in a hole of the other plate
    • 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
    • B21K23/00—Making other articles
    • 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
    • B21K25/00—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices

Definitions

  • the present disclosure relates to a forging method and forging apparatus. More particularly, the present disclosure relates to a forging method and forging apparatus in which at front and rear portions of a workpiece, two products can be simultaneously shaped, thereby to improve a productivity of compression-shaping.
  • forging is a shaping method that presses a workpiece such as iron or non-ferrous metal to cause plastic deformation thereof.
  • the forging work for compressing the workpiece is performed by a press machine (hereinafter referred to as a "press") including an upper die and a lower die.
  • the forging may be classified into a single forging method and a sequential forging method.
  • a forged product is obtained by compressing a single workpiece once.
  • a sequential forging method a long plate workpiece is injected to a progressive press to form a forged product via multiple sequential forgings.
  • the conventional forging method includes preparing a press comprising upper and lower dies, each of which has a punching part, a cutting/pressing part, a pressing part, and an extraction part that are sequentially provided from one side to an opposite side thereof, and repeatedly elevating the upper die; continuously forming workpiece passing/fixing parts in a tray plate through the punching part by supplying a tray plate by one pitch from one side to an opposite side towards an upper side of the lower die whenever the upper die is lifted; introducing workpiece plates from a front side to upper sides of the workpiece passing/fixing parts whenever the upper die is lifted, repeatedly cutting the workpiece plates through the cutting/pressing part, continuously introducing the cut workpieces to upper sides of the workpiece passing/fixing parts, pressing the introduced workpiece, and fixing the workpieces to the workpiece passing/fixing parts; pressing the workpieces that are moved while being fixed to the tray plate, through the pressing part; and separating the workpieces that have been formed while being fixed to the tray plate, and extracting the separated workpieces
  • the convention forging apparatus includes a press having upper and lower dies; a tray plate supply assembly that supplies a tray plate by one pitch from one side to an opposite side towards an upper side of the lower die; punching parts that are provided on sides of the upper and lower dies to continuously form workpiece passing/fixing parts in the tray plate; a workpiece plate supply assembly that is provided in front of the press to supply a workpiece plate to the upper sides of the workpiece passing/fixing parts by one pitch; cutting/pressing parts that are provided in the upper and lower dies at opposite sides of the punching parts to repeatedly cut the workpiece plate introduced to upper sides of the workpiece passing/fixing parts and fix the cut workpieces to the workpiece passing/fixing parts after pressing the workpieces; pressing parts that are provided in the upper and lower dies at opposite sides of the cutting/pressing parts to press the moved workpieces; and extraction parts that are provided in the upper and lower dies at opposite sides of the pressing parts to separate and extract the formed workpieces.
  • the workpiece passing/fixing parts are molded/forged/extruded in the tray plate and then the workpiece is inserted and fixed in the workpiece passing/fixing parts.
  • a front-rear width of the tray plate should be wider than a front-rear width of the workpiece.
  • the present disclosure is intended to overcome the above conventional problem.
  • a purpose of the present disclosure is to provide a forging method and forging apparatus in which at front and rear portions of a workpiece, two products can be simultaneously shaped, thereby to improve a productivity of compression-shaping, in which only a middle portion of a workpiece is fixed to a tray plate that fixes the workpiece to reduce a front-rear direction width of the tray plate and thus to reduce an amount of the tray plate used during the workpiece shaping, and in which a compression shaping of the workpiece is performed while a minimum size workpiece required for a final product is fixed on the tray plate such that an amount of the workpiece as used can be minimized.
  • another purpose of the present disclosure is to provide a forging method and forging apparatus in which while only the middle portion of the workpiece is fixed to the tray plate, the workpiece is shaped at the front and rear portions thereof, and, thus, a chip or burr generated by punching the workpiece fixing hole in the tray plate does not affect the shaped rear and front portions of the workpiece at all. Therefore, in the compression-shaping of the workpiece, this may prevent the shaping failure due to the influence of chips or burrs generated during the punching of the tray plate, thereby to achieve an advantage of minimizing a defective shaping rate.
  • Still another purpose of the present disclosure is to provide a forging method and forging apparatus in which the workpieces are fixed to the tray plate such that the workpieces are arranged to be spaced apart from each other in a left-right direction.
  • the present disclosure provides a forging method according to claim 1.
  • the workpiece in the forging method, in the workpiece shaping operation, in the workpiece shaping operation, the workpiece is shaped at front and rear portion of the workpiece via one or more workpiece shaping units, and then, the front and rear portions of the workpiece shaped via the one or more workpiece shaping units are compression-cut to complete a last product.
  • the tray plate includes a upward-bent reinforcement plate formed in a length-direction at front and rear ends of the tray plate for reinforcing the tray plate .
  • the workpiece is made of metal
  • the tray plate is made of a metal having a lower ductility than the workpiece
  • the workpiece is made of aluminum or copper, wherein the tray plate is made of iron or stainless steel.
  • the present disclosure provides a forging apparatus according to claim 6.
  • the tray plate supply assembly includes an ascending and descending guide configured for supplying the tray plate away from the top face of the lower die and allowing the tray plate to move up and down.
  • the ascending and descending guide includes a plurality of ascending and descending guide rods, wherein the plurality of ascending and descending guide rods are formed in a middle portion of a top of the lower die and are arranged at intervals in a right-left direction, wherein the plurality of ascending and descending guide rods are maintained in an ascended position via an underlying spring while ascending and descending, wherein the plurality of ascending and descending guide rods are in close contact with a bottom face of the tray plate.
  • the workpiece fixing hole includes a plurality of fixing holes, wherein the through-protrusion includes a plurality of through fixing pins, wherein the plurality of through fixing pins penetrates the fixing holes constituting the workpiece fixing hole and then a top of the plurality of through fixing pins is compressed and extended by the cutting and pressing and fixing assembly.
  • the workpiece plate supply assembly includes: a workpiece plate supply unit disposed in front of the press having the cutting and pressing and fixing assembly for supplying the workpiece plate by one pitch; and protrusion forging means disposed between the workpiece plate supply unit and the cutting and pressing and fixing assembly for shaping the through-protrusion.
  • the protrusion forging means includes a fixed lower die and an ascending and descending upper die, wherein the fixed lower die has, at a top of the fixed die, a protrusion-shaping convex portion; wherein the ascending and descending upper die is disposed above the fixed lower die and has a protrusion-shaping concave portion at a bottom thereof, wherein the ascending and descending upper die repeatedly shapes the through-protrusions in a repetitive compression manner via iterative ascending and descending.
  • the cutting and pressing and fixing assembly includes: a workpiece cutting unit provided with a workpiece cutter at a lower front of the upper die to cut the workpiece plate via a lowering of the upper die; and a workpiece pressing and fixing unit provided at a rear end of the workpiece cutting unit, wherein the workpiece pressing and fixing unit 52 has a compressing pin at a bottom of the upper die, wherein the workpiece pressing and fixing unit pushes the through-protrusion formed on the middle portion of the workpiece into the workpiece fixing hole and compresses and fixes a top of the through-protrusion into the workpiece fixing hole via the lowering of the upper die.
  • the cutting and pressing and fixing assembly further includes a guide plate, wherein the guide plate has a rear end fixed to the lower die, wherein the guide plate protrudes forwards to be spaced from the top face of the lower die, wherein the guide plate has a guide groove defined in a lower portion of the plate, into which the tray plate is inserted to move to the opposite side, wherein the guide plate has a through hole defined above the groove, through which the compressing pin penetrates.
  • the cutting and pressing and fixing assembly further includes a plurality of ascending and descending guide rods, wherein the plurality of ascending and descending guide rods are disposed in a top portion of the lower die and are arranged in a front-rear direction, wherein the plurality of ascending and descending guide rods are maintained at an elevated position via an underlying spring while ascending and descending, wherein the plurality of ascending and descending guide rods are in close contact with a bottom face of the workpiece plate supplied from a front.
  • the pressing and shaping unit includes: at least one workpiece shaping unit provided on the upper and lower dies for shaping the workpiece via compression; and a last shaping unit provided on the upper and lower dies for compress-cutting, via a vertical cutter, the front and rear portions of the workpiece as shaped via the one or more workpiece shaping units, thereby obtaining a final product.
  • two products can be simultaneously shaped, thereby to improve a productivity of compression-shaping.
  • a middle portion of a workpiece is fixed to a tray plate that fixes the workpiece to reduce a front-rear direction width of the tray plate and thus to reduce an amount of the tray plate used during the workpiece shaping.
  • a compression shaping of the workpiece is performed while a minimum size workpiece required for a final product is fixed on the tray plate such that an amount of the workpiece as used can be minimized.
  • the workpiece while only the middle portion of the workpiece is fixed to the tray plate, the workpiece is shaped at the front and rear portions thereof, and, thus, a chip or burr generated by punching the workpiece fixing hole in the tray plate does not affect the shaped rear and front portions of the workpiece at all. Therefore, in the compression-shaping of the workpiece, this may prevent the shaping failure due to the influence of chips or burrs generated during the punching of the tray plate, thereby to achieve an advantage of minimizing a defective shaping rate.
  • the workpieces are fixed to the tray plate such that the workpieces are arranged to be spaced apart from each other in a left-right direction.
  • the expansion may not impose any interference to neighboring workpieces.
  • working accuracy can be improved during the compression-shaping of each workpiece, thereby shaping a high-precision product.
  • FIG. 1 is a schematic perspective view showing a forging apparatus according to the present disclosure.
  • FIG. 2 is a top view of a lower die showing main portions according to the present disclosure.
  • FIG. 3 is a schematic perspective view of main portions according to the present disclosure.
  • FIG. 4 is a cross-sectional view taken along a line A-A of FIG. 1 .
  • FIG. 4A shows a state before a workpiece is fixed.
  • FIG. 4B shows a workpiece in a fixed state.
  • FIG. 5 is a partial schematic view seen from a part C of FIG. 2 .
  • FIG. 5A shows an upper die in a raised state.
  • FIG. 5B shows a state where the upper die is lowered.
  • FIG. 6 is a flow chart of a forging method according to the present disclosure.
  • an apparatus for forging a workpiece includes a press 1 having upper and lower dies 11 and 12, and includes a tray plate supply assembly 2 that supplies, by one pitch, a tray plate 7 in a raised or lowered manner from one side (hereinafter, a left side of the drawings will be referred to as one side and a right side of the drawings that is an opposite side thereto will be referred to an opposite side) to the opposite side towards a middle portion of a top of the lower die 12 and to be spaced from a top face of the lower die 12.
  • a left side of the drawings will be referred to as one side and a right side of the drawings that is an opposite side thereto will be referred to an opposite side
  • the forging apparatus includes a punching unit 3 disposed on the upper and lower dies 11 and 12 at one side thereof to continuously form a workpiece fixing hole 71 in the tray plate 7; a workpiece plate supply assembly 4 provided in front of an opposite side of the punching unit 3 for feeding a workpiece plate 8 at one pitch to a position below the workpiece fixing hole 71 defined in the tray plate 7, wherein the workpiece plate supply assembly 4 forms a through-protrusion 82 to pass through the workpiece fixing hole 71 at a top of a middle portion of a portion of the workpiece plate 8 corresponding to the fed one pitch; a cutting and pressing and fixing assembly 5 provided on the upper and lower die 11 and 12 at the opposite side of the punching unit 3 for cutting the workpiece plate 8 to be fed to the position below the workpiece fixing hole 71 of the tray plate 7 by one pitch and for pressing and fixing the through-protrusion 82 formed on the rear end of the cut workpiece 81 into the workpiece fixing hole 71; and a pressing and shaping unit 6
  • the press 1 has the upper and lower dies 11 and 12.
  • the upper die 11 is raised and lowered from and toward a top of the lower die 12.
  • a configuration in which the upper die 11 is moved upward and downward is already known, and a detailed description thereof will be omitted.
  • the tray plate supply assembly 2 constituting the apparatus of the present disclosure is spaced from one side of the press 1 to supply the tray plate 7 wound on a roller to the top face of the lower die 12 of the press 1.
  • the tray plate supply assembly 2 feeds the tray plate 7 from one side to the opposite side by one pitch to the top face of the lower die 12 via driving of upper and lower rollers associated with each other.
  • the tray plate supply assembly 2 further includes an ascending and descending guide 13 for supplying the tray plate 7 away from the top face of the lower die 12 and allowing the tray plate to move up and down.
  • the ascending and descending guide 13 includes a plurality of ascending and descending guide rods 131.
  • the plurality of ascending and descending guide rods 131 are formed on a middle region of a top of the lower die 12 and arranged at intervals in a right-left direction.
  • the plurality of ascending and descending guide rods 131 are maintained in an ascended position via an underlying spring S while ascending and descending.
  • the plurality of ascending and descending guide rods 131 are in close contact with a bottom face of the tray plate 7. That is, when the upper die 11 is lowered, the tray plate 7 is moved downward and is brought into close contact with the top face of the lower die 12.
  • the apparatus according to the present disclosure feeds the tray plate 7 to be spaced apart from the top face of the lower die 12 via the ascending and descending guide 13 including the ascending and descending guide rods 131.
  • the tray plate 7 includes an upward-bent reinforcement plate 72 formed in a length-direction at the front and rear end of the tray plate 7 for reinforcing the tray plate 7.
  • the upward-bent reinforcement plate 72 prevents the tray plate 7 from being twisted or warped.
  • the punching unit 3 constituting the apparatus according to the present disclosure is disposed on the upper and lower dies 11 and 12 at one side thereof.
  • the punching unit 3 serves to continuously form a workpiece fixing hole 71 in the tray plate 7.
  • the workpiece fixing hole 71 includes a plurality of fixing holes 711 for firmly fixing the workpiece 81.
  • the punching unit 3 includes a plurality of punchers (not shown) protruding downward from the upper die 11, and a plurality of discharge holes (not shown) defined in the lower die 12 for receiving a piece punched by with the puncher.
  • the workpiece plate 8 supply assembly 4 constituting the apparatus of the present disclosure is spaced from the front of the press 1.
  • the workpiece plate supply assembly 4 serves to supply the workpiece plate 8 wound on a roller to the cutting and pressing and fixing assembly 5.
  • the workpiece plate supply assembly 4 is disposed in front of the cutting and pressing and fixing assembly 5.
  • the workpiece plate supply assembly 4 may include a workpiece plate supply unit 41 for supplying the workpiece plate 8 at a pitch and protrusion forging means 42 disposed between the workpiece plate supply unit 41 and the cutting and pressing and fixing assembly 5 for shaping the through-protrusion 82.
  • the workpiece plate supply unit 41 feeds the workpiece plate 8 at one pitch above a through-fixing portion for the workpiece 81 via the driving of upper and lower rollers interlocked with each other.
  • the workpiece plate supply unit 41 is already known, and a detailed description thereof will be omitted.
  • the protrusion forging means 42 may shape the through-protrusion 82 on the workpiece plate 8 by compressing the workpiece plate 8.
  • the protrusion forging means 42 may include a fixed lower die 421 and an ascending and descending upper die 422.
  • the fixed lower die 421 has, at a top, a protrusion-shaping convex portion 421a.
  • the ascending and descending upper die 422 is disposed above the fixed lower die 421, and has a protrusion-shaping concave portion 422a at a bottom thereof.
  • the ascending and descending upper die 422 may shape the through-protrusions 82 in a repetitive compression manner via iterative ascending and descending.
  • the through-protrusion 82 includes a plurality of through fixing pins 821, wherein the plurality of through fixing pins 821 penetrates the fixing holes 711 constituting the workpiece fixing hole 71 and then a top of the plurality of through fixing pins 821 is compressed and extended by the cutting and pressing and fixing assembly 5.
  • the cutting and pressing and fixing assembly 5 constituting the apparatus according to the present disclosure is constructed to repeatedly cut the workpiece plate 8 inserted into the cutting and pressing and fixing assembly 5, and to press and fix the rear end of the cut workpiece 81 end to the tray plate 7.
  • the cutting and pressing and fixing assembly 5 includes a workpiece cutting unit 51 provided with a workpiece cutter 511 at a lower front of the upper die 11 to cut the workpiece plate 8 via a lowering of the upper die 11, and a workpiece pressing and fixing unit 52 provided at a rear end of the workpiece cutting unit 51, wherein the workpiece pressing and fixing unit 52 has a compressing pin 521 at a bottom of the upper die 11, wherein the workpiece pressing and fixing unit 52 pushes the through-protrusion 82 formed in the rear end of the workpiece 81 into the workpiece fixing hole 71 and compresses and fixes a top of the through-protrusion 82 into the workpiece fixing hole 71 via the lowering of the upper die 11.
  • the top of the through-protrusion 82 extends like a rivet, such that the through-protrusion 82 is permanently inserted and fixed within the workpiece fixing hole 71.
  • the cutting and pressing and fixing assembly 5 further includes a guide plate 53.
  • the guide plate 53 has a rear end fixed to the lower die 12.
  • the guide plate 53 protrudes forwards to be spaced from the top face of the lower die 12.
  • the guide plate 53 has a guide groove 531 defined in a lower portion thereof, into which the tray plate 7 is inserted to move to the opposite side.
  • the guide plate 53 has a through hole 532 defined above the groove 531, through which the compressing pin 521 penetrates.
  • the cutting and pressing and fixing assembly 5 further includes a plurality of ascending and descending guide rods 54.
  • the plurality of ascending and descending guide rods 54 are disposed in the top portion of the lower die 12 and are arranged in a front-rear direction.
  • the plurality of ascending and descending guide rods 54 are maintained at their elevated position via the underlying spring S while ascending and descending.
  • the plurality of ascending and descending guide rods 54 are in close contact with the bottom face of the workpiece plate 8 supplied from the front.
  • the workpiece 81 may be made of metal.
  • the tray plate 7 may be preferably made of a metal having a lower ductility than the workpiece 81. Further, the workpiece 81 may be made of aluminum or copper. The tray plate 7 may be made of iron or stainless steel.
  • the workpiece 81 while only the middle portion of the workpiece 81 is fixed to the tray plate 7, the workpiece 81 is press-shaped at the rear and front portions thereof.
  • a chip or burr generated by punching the workpiece fixing hole 71 in the tray plate 7 does not affect the shaped rear and front portions of the workpiece 81 at all. Therefore, according to the present disclosure, in the compression-shaping of the workpiece 81, this may prevent the shaping failure due to the influence of chips or burrs generated during the punching of the tray plate 7, thereby to achieve an advantage of minimizing a defective shaping rate.
  • the pressing and shaping unit 6 constituting the apparatus according to the present disclosure is provided on the upper and lower dies 11 and 12 to compress-shape the moved workpiece 81.
  • the pressing and shaping unit includes at least one workpiece shaping unit 61 provided at one side of the press for shaping the front and rear portions of the workpiece 81 via compression; and a last shaping unit 62 provided on the upper and lower dies 11 and 12 at the opposite side of a single workpiece shaping unit 61 and of a workpiece shaping unit 61 located at the most opposite side among the plurality of workpiece shaping units 61, wherein the last shaping unit 62 compresses and cuts, via a vertical cutter C, the shaped front and rear portions of the workpiece 81, which has been shaped via the one or more workpiece shaping units 61, thereby obtaining a final product.
  • the forging method according to the present disclosure may be performed using the forging apparatus described above, or may be performed using another forging apparatus.
  • the forging method according to the present disclosure an example using the forging apparatus according to the present disclosure as described above is considered.
  • the forging method first performs an operation 100 of ascending and descending the upper die 11 of press 1 repeatedly, wherein the press 1 includes the upper and lower dies 11 and 12, which sequentially have the punching unit 3, the cutting and pressing and fixing assembly 5, and the pressing and shaping unit 6 from one side of the press 1 to the opposite side of the press 1.
  • the method performs a workpiece fixing hole shaping operation 200 in which each time the upper die 11 is raised, the tray plate 7 is supplied by one pitch from said one side of the press towards said opposite side of the press along a middle portion between a front and a rear portion of the lower die, and above said lower die 12 so as to be spaced apart from a top face of the lower die 12 in such a manner that the tray plate 7 can ascend and descend, and at the same time, the workpiece fixing hole 71 is continuously punctured in the tray plate 7 via the punching unit 3.
  • the method performs a workpiece plate supply operation 300 in which each time the upper die 11 is raised, the workpiece plate 8 is supplied from a front by one pitch to a position below the workpiece fixing hole 71 of the tray plate 7 located on the cutting and pressing and fixing assembly 5, and, at the same time, the through-protrusion 82 to pass through the workpiece fixing hole 71 is formed on a top of a middle portion of a portion of the workpiece plate 8 corresponding to the supplied one pitch.
  • the workpiece 81 may be made of metal.
  • the tray plate 7 may be preferably made of a metal having a lower ductility than the workpiece 81. Further, the workpiece 81 may be made of aluminum or copper. The tray plate 7 may be made of iron or stainless steel.
  • the method performs a workpiece fixing operation 400 in which the workpiece plate 8 supplied into the position below the workpiece fixing hole 71 located on the cutting and pressing and fixing assembly 5 is cut by one pitch, and, then, the through-protrusion 82 formed on the middle portion of the cut workpiece 81 passes through the workpiece fixing hole 71 and is compressed and fixed into the workpiece fixing hole 71. That is, the workpiece fixing operation 400 is repeatedly performed in a process of repeatedly ascending and descending the upper die of the press including the upper and lower dies. The operation 400 is preferably repeatedly performed in a process of supplying the workpiece plate by one pitch.
  • the method performs a workpiece shaping operation 500 in which the workpiece 81, which is moved while being fixed to the tray plate 7, is compression-shaped by the pressing and shaping unit 6. Thereby, the compression-shaping of the workpieces 81 is completed.
  • the workpiece 81 in order to compress-shape the workpiece 81 in various shapes, the workpiece 81 is shaped at the front and rear portions thereof via one or more workpiece shaping units 61, and then, the front and rear portions of the workpiece 81, which has been shaped via the one or more workpiece shaping units 61, is compression-cut by the vertical cutter C of the last shaping unit 62. This completes the last product.
  • the forging method and forging apparatus according to the present disclosure, only the middle portion of the workpiece 81 is fixed to the tray plate 7 which fixes the workpiece 81. As a result, the front-rear directional width of the tray plate 7 is reduced. This can reduce the amount of the tray plate 7 used when shaping the workpiece 81, thereby lowering the manufacturing cost of the product.
  • the forging apparatus according to the present disclosure fixes the workpiece 81 having the minimum size required for the last product to the tray plate 7 and then compress-shapes the product. Thus, the use amount of the workpiece 81 can be minimized, and thus, the manufacturing cost of the product can be reduced.
  • the workpieces 81 are fixed to the tray plate 7 such that the workpieces 81 are arranged to be spaced apart from each other in a left-right direction.
  • the expansion may not impose any interference to neighboring workpieces 81.
  • working accuracy can be improved during the compression-shaping of each workpiece 81, thereby shaping a high-precision product.

Claims (14)

  1. Procédé de forgeage comprenant :
    une opération (100) consistant à faire monter et descendre une matrice supérieure (11) d'une presse (1) à plusieurs reprises, la presse (1) comprenant des matrices supérieure et inférieure (11; 12) comportant successivement une unité de perçage (3), un ensemble de coupe et de pressage et de fixation (5), et une unité de pressage et de façonnage (6), agencés d'un côté de la presse (1) à un côté opposé de la presse (1) ;
    une opération (200) de façonnage d'un trou (71) de fixation de pièce à usiner, dans laquelle, chaque fois que la matrice supérieure (11) est relevée, une plaque de plateau (7) est alimenté d'un pas à partir dudit côté de la presse vers ledit côté opposé de la presse, le long d'une partie médiane entre une partie avant et une partie arrière de la matrice inférieure (12), et au-dessus de ladite matrice inférieure (12), de telle façon que la plaque de plateau (7) puisse monter et descendre, et que, en même temps, un trou (71) de fixation de pièce à usiner soit percé en continu dans la plaque de plateau (7) par l'intermédiaire de l'unité de perçage (3) ;
    une opération (300) d'alimentation de plaque (8) de pièce à usiner, dans laquelle, chaque fois que la matrice supérieure (11) est relevée, une plaque (8) de pièce à usiner est alimentée d'un pas à partir d'une partie avant de la presse (1) vers une position en dessous du trou (71) de fixation de pièce à usiner de la plaque de plateau (7) située sur l'ensemble de coupe et de pressage et de fixation (5), ladite plaque (8) de pièce à usiner étant munie, à un demi-pas de son extrémité amont, d'une saillie traversante (82) destinée à passer à travers le trou (71) de fixation de pièce à usiner ; et, en même temps, une autre saillie traversante (82) est formée sur une partie médiane avant-arrière suivante de la plaque (8) de pièce à usiner correspondant à un pas alimenté suivant ;
    une opération (400) de fixation de pièce à usiner, dans laquelle la plaque (8) de pièce à usiner, alimentée vers la position en dessous du trou (71) de fixation de pièce à usiner situé sur l'ensemble de coupe et de pressage et de fixation (5), est découpée d'un pas ; et dans laquelle la saillie traversante (82), formée sur la partie médiane de la pièce à usiner (81) découpée, passe à travers le trou (71) de fixation de pièce à usiner et elle est comprimée et fixée dans le trou (71) de fixation de pièce à usiner ; et
    une opération (500) de façonnage de pièce à usiner, dans laquelle la pièce à usiner (81), après avoir été découpée de la plaque (8) de pièce à usiner et fixée à la plaque de plateau (7), ainsi que déplacée d'un pas par la plaque de plateau (7), est façonnée par compression par l'unité de pressage et de façonnage (6).
  2. Le procédé de forgeage de la revendication 1, dans lequel, lors de l'opération de façonnage de la pièce à usiner, la pièce à usiner (81) est façonnée au niveau des parties avant et arrière de la pièce à usiner (81) par l'intermédiaire d'une ou plusieurs unités (6) de façonnage de pièce à usiner, et ensuite les parties avant et arrière de la pièce à usiner (81), façonnées par l'intermédiaire de la ou des unités (6) de façonnage de pièce à usiner, sont découpées par compression pour compléter un produit fini.
  3. Le procédé de forgeage de l'une des revendications 1 ou 2, dans lequel la plaque de plateau (7) comprend en outre une plaque de renforcement (72) courbée vers le haut, formée dans une direction longitudinale au niveau des extrémités avant et arrière de la plaque de plateau (7), afin de renforcer la plaque de plateau (7).
  4. Le procédé de forgeage de l'une des revendications 1 à 3, dans lequel la pièce à usiner (81) est en métal, et dans lequel la plaque de plateau (7) est constituée d'un métal présentant une ductilité inférieure à celle de la pièce à usiner (81).
  5. Le procédé de forgeage de la revendication 4, dans lequel la pièce à usiner (81) est en aluminium ou en cuivre, et dans lequel la plaque de plateau (7) est en fer ou en acier inoxydable.
  6. Appareil de forgeage comprenant :
    une presse (1) comportant des matrices supérieure et inférieure (11; 12) comprenant une unité de perçage (3), un ensemble de coupe et de pressage et de fixation (5) et une unité de pressage et de façonnage (6), agencés successivement d'une côté de la presse (1) à un côté opposé de la presse (1), et dans laquelle :
    un ensemble (2) d'alimentation de plaque de plateau (7) est disposé pour alimenter, d'un pas, une plaque de plateau (7) à partir dudit côté de la presse (1) vers ledit côté opposé de la presse (1) le long d'une partie médiane entre une partie avant et une partie arrière de la matrice inférieure (12), et au-dessus de ladite matrice inférieure (12), l'ensemble (2) d'alimentation de plaque de plateau comprenant un guide montant et descendant (13) conçu pour alimenter la plaque de plateau (7) à distance de la face supérieure de la matrice inférieure (12) et pour permettre le déplacement de la plaque de plateau vers le haut et vers le bas, de sorte que la plaque de plateau (7) puisse monter et descendre chaque fois que la matrice supérieure (11) est relevée ;
    ladite unité de perçage (3) est disposé sur les matrices supérieure et inférieure (11; 12) au niveau dudit côté de la presse (1), afin de former en continu un trou (71) de fixation de pièce à usiner dans la plaque de plateau (7) ;
    un ensemble (4) d'alimentation de plaque (8) de pièce à usiner est disposé devant ledit ensemble de coupe et de pressage et de fixation (5), afin d'alimenter d'un pas une plaque (8) de pièce à usiner, de sorte qu'une saillie traversante (82), située à un demi-pas de l'extrémité amont de ladite plaque (8) de pièce à usiner, soit alimentée vers une position en dessous du trou (71) de fixation de pièce à usiner défini dans la plaque de plateau (7) ;
    l'ensemble (4) d'alimentation de pièce à usiner comprend des moyens destinés à former une autre saillie traversante (82) sur une partie médiane dans la direction avant-arrière, dans une partie de la plaque (8) de pièce à usiner correspondant à un pas alimenté suivant ;
    ledit ensemble de coupe et de pressage et de fixation (5) est muni, sur les matrices supérieure et inférieure (11; 12), de moyens permettant de découper la plaque (8) de pièce à usiner alimentée d'un pas vers la position en dessous du trou (71) de pièce à usiner de la plaque de plateau (7), et de moyens permettant de presser et de fixer la saillie traversante (82), formée sur la pièce à usiner (81) découpée, dans le trou (71) de fixation de pièce à usiner ; et
    ladite unité de pressage et de façonnage (6) est munie, sur les matrices supérieure et inférieure (11; 12), de moyens permettant de comprimer et de façonner la pièce à usiner (81) alimentée.
  7. L'appareil de forgeage de la revendication 6, dans lequel le guide montant et descendant (13) comprend une pluralité de tiges (131) de guide montant et descendant, les tiges (131) de guide montant et descendant étant formées dans une partie médiane d'une partie supérieure de la matrice inférieure (12), et étant disposées à intervalles dans une direction gauche-droite, les tiges (131) de guide montant et descendant étant maintenues dans une position montée par l'intermédiaire d'un ressort sous-jacent (S) lors de la montée et de la descente, et les tiges (131) de guide montant et descendant étant en contact étroit avec une face inférieure de la plaque de plateau (7).
  8. L'appareil de forgeage de la revendication 6, dans lequel l'unité de perçage est adaptée à former une pluralité de trous de fixation (711),
    dans lequel l'ensemble (4) d'alimentation de plaque de pièce à usiner est adapté à former ladite saillie traversante (82) sous forme d'une pluralité de broches de fixation traversantes (821), et dans lequel l'ensemble de coupe et de pressage et de fixation (5) est adapté à laisser pénétrer les broches de fixation traversantes (821) dans les trous de fixation (711) constituant le trou (71) de fixation de pièce à usiner, et ensuite à comprimer et à agrandir une partie supérieure desdites broches de fixation traversantes (821).
  9. L'appareil de forgeage de la revendication 6,
    dans lequel l'ensemble (4) d'alimentation de plaque de pièce à usiner comprend :
    une unité (41) d'alimentation de plaque de pièce à usiner, disposée devant l'ensemble de coupe et de pressage et de fixation (5) de la presse (1), et permettant d'alimenter d'un pas la plaque (8) de pièce à usiner ; et
    des moyens (42) de forgeage de saillie, disposés entre l'unité (41) d'alimentation de plaque de pièce à usiner et l'ensemble de coupe et de pressage et de fixation (5), et permettant de façonner la saillie traversante (82).
  10. L'appareil de forgeage de la revendication 9,
    dans lequel le moyen (42) de forgeage de saillie comprend une matrice inférieure fixe (421) et une matrice supérieure montante et descendante (422),
    dans lequel la matrice inférieure fixe (421) comporte, au niveau d'une partie supérieure de la matrice (421), une partie convexe (421a) de façonnage de saillie ;
    dans lequel la matrice supérieure montante et descendante (422) est disposée au-dessus de la matrice inférieure fixe (421) et comporte une partie concave (422a) de façonnage de saillie au niveau d'une partie inférieure de la matrice (422), et dans lequel la matrice supérieure montante et descendante (422) façonne à plusieurs reprises les saillies traversantes (82) à l'aide d'une compression répétitive par l'intermédiaire de montées et de descentes itératives.
  11. L'appareil de forgeage de la revendication 6,
    dans lequel l'ensemble de coupe et de pressage et de fixation (5) comprend :
    une unité de coupe (51) de pièce à usiner, munie d'un outil de coupe (511) de pièce à usiner au niveau d'une partie avant inférieure de la matrice supérieure (11), destiné à découper la plaque (8) de pièce à usiner par l'intermédiaire d'une descente de la matrice supérieure (11) ; et
    une unité de pressage et de fixation (52) de pièce à usiner, disposée au niveau d'une extrémité arrière de l'unité de coupe (51) de pièce à usiner, l'unité de pressage et de fixation (52) de pièce à usiner comportant une broche de compression (521) au niveau d'une partie inférieure de la matrice supérieure (11), l'unité de pressage et de fixation (52) de pièce à usiner étant adaptée à pousser la saillie traversante (82), formée sur la partie médiane de la pièce à usiner (81), dans le trou (71) de fixation de pièce à usiner, et pour comprimer et pour fixer une partie supérieure de la saillie traversante (82) dans le trou (71) de fixation de pièce à usiner par l'intermédiaire de la descente de la matrice supérieure (11).
  12. L'appareil de forgeage de la revendication 11,
    dans lequel l'ensemble de coupe et de pressage et de fixation (5) comprend en outre une plaque de guidage (53),
    la plaque de guidage (53) comportant une extrémité arrière fixée à la matrice inférieure (12), la plaque de guidage (53) faisant saillie vers l'avant pour être espacée de la face supérieure de la matrice inférieure (12), la plaque de guidage (53) comportant une rainure de guidage (531) définie dans une partie inférieure de la plaque (53), conçue pour recevoir la plaque de plateau (7), et la plaque de guidage comportant un trou traversant (532) défini au-dessus de la rainure (531) et à travers lequel la broche de compression (521) pénètre.
  13. L'appareil de forgeage de la revendication 11, dans lequel l'ensemble de coupe et de pressage et de fixation (5) comprend en outre une pluralité de tiges (54) de guide montant et descendant, les tiges (54) de guide montant et descendant étant disposées dans une partie supérieure de la matrice inférieure (12) et étant agencées dans une direction avant-arrière, les tiges (54) de guide montant et descendant étant maintenues au niveau d'une position élevée par l'intermédiaire d'un ressort sous-jacent (S) lors de la montée et de la descente, et les tiges (54) de guide montant et descendant étant en contact étroit avec une face inférieure de la plaque (8) de pièce à usiner alimentée à partir d'une partie avant.
  14. L'appareil de forgeage de la revendication 6, dans lequel l'unité de pressage et de façonnage (6) comprend :
    au moins une unité (61) de façonnage de pièce à usiner, disposée sur les matrices supérieure et inférieure (11; 12) et permettant de façonner la pièce à usiner (81) par l'intermédiaire d'une compression ; et
    une unité de façonnage final (62), disposée sur les matrices supérieure et inférieure (11; 12) et permettant de découper par compression, par l'intermédiaire d'un outil de coupe vertical, les parties avant et arrière de la pièce à usiner (81) façonnée par l'intermédiaire de la ou des unités (61) de façonnage de pièce à usiner, obtenant ainsi un produit fini.
EP16891733.4A 2016-02-24 2016-09-09 Procédé de forgeage et appareil de forgeage Active EP3456429B1 (fr)

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