WO2022034843A1 - 成形装置、及び金属パイプ - Google Patents
成形装置、及び金属パイプ Download PDFInfo
- Publication number
- WO2022034843A1 WO2022034843A1 PCT/JP2021/028982 JP2021028982W WO2022034843A1 WO 2022034843 A1 WO2022034843 A1 WO 2022034843A1 JP 2021028982 W JP2021028982 W JP 2021028982W WO 2022034843 A1 WO2022034843 A1 WO 2022034843A1
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- WO
- WIPO (PCT)
- Prior art keywords
- mold
- metal pipe
- molding
- pipe material
- molds
- Prior art date
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- 239000002184 metal Substances 0.000 title claims abstract description 158
- 238000000465 moulding Methods 0.000 title claims abstract description 134
- 239000000463 material Substances 0.000 claims abstract description 107
- 239000012530 fluid Substances 0.000 claims description 32
- 230000007246 mechanism Effects 0.000 claims description 25
- 238000013459 approach Methods 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 description 19
- 238000010438 heat treatment Methods 0.000 description 13
- 239000007789 gas Substances 0.000 description 12
- 238000001816 cooling Methods 0.000 description 8
- 230000002250 progressing effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 101000759226 Homo sapiens Zinc finger protein 143 Proteins 0.000 description 1
- 244000208734 Pisonia aculeata Species 0.000 description 1
- 102100023389 Zinc finger protein 143 Human genes 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
-
- 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/039—Means for controlling the clamping or opening of the moulds
-
- 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
- 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
- B21D22/02—Stamping using rigid devices or tools
- B21D22/025—Stamping using rigid devices or tools for tubular articles
-
- 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
-
- 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/041—Means for controlling fluid parameters, e.g. pressure or temperature
-
- 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/047—Mould construction
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
Definitions
- the present invention relates to a molding apparatus and a metal pipe.
- Patent Document 1 includes a molding die having a lower die and an upper die paired with each other, and a fluid supply unit for supplying a fluid into a metal pipe material held between the molding dies.
- the molding apparatus is disclosed.
- a molding device such as the above-mentioned prior art may form a metal pipe with a flange by crushing both sides of the metal pipe material in the width direction with an upper die and a lower die.
- a molding apparatus has a problem that it is difficult to mold the flange portion into a desired size because the spread cannot be regulated when the flange portion expands in the width direction.
- the present invention has been made to solve such a problem, and an object of the present invention is a molding apparatus capable of reducing variation in the size of the flange portion, and reduction in variation in the size of the flange portion. Is to provide metal pipes.
- the molding apparatus is a molding apparatus for forming a metal pipe with a flange, and includes a molding die for forming the metal pipe, and the molding die is oriented in the first direction in a cross-sectional view. It has a first mold and a second mold facing each other, and also has a third mold for regulating the flange scheduled portion of the metal pipe material, and the third mold is the first mold and the first mold. Continue to correct the misalignment of the planned flange portion until the mold is tightened by the mold 2.
- the molding dies have a first mold and a second mold facing each other in the first direction in a cross-sectional view. Further, the molding die has a third die for regulating the planned flange portion of the metal pipe. This third mold continues to correct the deviation of the planned flange portion between the first mold and the mold clamping by the second mold. Therefore, the third mold corrects the deviation of the planned flange portion even in the state where the mold closing operation of the first mold and the second mold progresses and the crushing of the planned flange portion progresses. You can continue. From the above, it is possible to reduce the variation in the size of the flange portion after completion.
- the third mold is placed on at least one side of the metal pipe material in the second direction intersecting the first direction, the third mold as the first mold and the second mold approach each other. , Stay away from metal pipe material.
- This third mold can regulate that the flange portion of the metal pipe material crushed by the first mold and the second mold spreads too much in the second direction.
- the third mold moves away from the metal pipe material as the first mold and the second mold approach each other. Therefore, the third mold can continue to regulate the flange portion even in a state where the mold closing operation of the first mold and the second mold is progressing and the flange portion is being crushed. .. From the above, it is possible to reduce the variation in the size of the flange portion.
- the third mold is a metal pipe as the first mold and the second mold approach each other due to the tapered structure formed between the first mold and at least one of the second molds. You may move away from the material. In this case, the simple structure allows the third mold to be kept away from the metal pipe material.
- the molding die may be a metal pipe that is curved when viewed from the first direction.
- the size of the flange portion tends to vary between the inner peripheral side and the outer peripheral side of the curve, but by adopting the configuration of the present invention, the variation can be reduced.
- the metal pipe has flanges on both sides in a second direction that intersects the first direction, and the mold has a pair of third molds that are placed on both sides of the metal pipe material in the second direction. May have. In this case, it is possible to reduce the variation in the size of the flange portions on both sides of the metal pipe.
- the pair of third molds may be arranged so that the flange portions on both sides have the same size in the second direction. In this case, the sizes of the flanges on both sides of the metal pipe can be the same.
- the pair of third molds may be arranged so that the sizes of the flange portions on both sides in the second direction are predetermined sizes different from each other.
- the flange portions on both sides of the metal pipe can each have a desired size.
- the molding apparatus may further include a fluid supply unit that supplies a fluid to the heated metal pipe material.
- a fluid supply unit that supplies a fluid to the heated metal pipe material.
- the size of the flange portion tends to vary due to temperature variation and the like, but by adopting the configuration of the present invention, the variation can be reduced.
- the molding apparatus may further include an elastic mechanism for applying an elastic force to the metal pipe material side in the second direction intersecting the first direction with respect to the third mold.
- the third mold can be returned to the original position when the first mold and the second mold are opened without providing an expensive actuator or the like.
- the metal pipe according to one aspect of the present invention has a hollow pipe portion and a pair of flange portions protruding from the pipe portion on both sides in the width direction, and the sizes of the pair of flange portions in the width direction are different from each other. It will be a different predetermined size.
- the sizes of the pair of flanges in the width direction are different from each other.
- the processing is performed so that each flange portion has a predetermined size at the time of molding, it is possible to reduce the variation in the size of the flange portion.
- the molding apparatus is a molding apparatus for forming a metal pipe with a flange, and includes a molding die for forming the metal pipe, and the molding die is oriented in the first direction in a cross-sectional view. It has a first mold facing each other, a second mold, and a third mold disposed on at least one side of the metal pipe material in a second direction intersecting the first direction. The mold 3 moves away from the metal pipe material as the first mold and the second mold approach each other.
- the molding mold has a first mold and a second mold facing each other in the first direction in a cross-sectional view.
- the mold also has a third mold that is disposed on at least one side of the metal pipe material in a second direction that intersects the first direction.
- This third mold can regulate that the flange portion of the metal pipe material crushed by the first mold and the second mold spreads too much in the second direction.
- the third mold moves away from the metal pipe material as the first mold and the second mold approach each other. Therefore, the third mold can continue to regulate the flange portion even in a state where the mold closing operation of the first mold and the second mold is progressing and the flange portion is being crushed. .. From the above, it is possible to reduce the variation in the size of the flange portion.
- the present invention it is possible to provide a molding apparatus capable of reducing the variation in the size of the flange portion and a metal pipe in which the variation in the size of the flange portion is reduced.
- FIG. 1 is a schematic view of the molding apparatus 1 according to the present embodiment.
- the molding apparatus 1 is an apparatus for forming a metal pipe having a hollow shape by blow molding.
- the molding apparatus 1 is installed on a horizontal plane.
- the molding apparatus 1 includes a molding die 2 (molding die), a drive mechanism 3, a holding unit 4, a heating unit 5, a fluid supply unit 6, a cooling unit 7, and a control unit 8.
- the metal pipe refers to a hollow article after the molding is completed in the molding device 1
- the metal pipe material 40 refers to a hollow article before the molding is completed in the molding device 1.
- the metal pipe material 40 is a pipe material of a steel grade that can be hardened. Further, among the horizontal directions, the direction in which the metal pipe material 40 extends at the time of molding may be referred to as "longitudinal direction", and the direction orthogonal to the longitudinal direction may be referred to as "width direction (second direction)".
- the molding die 2 is a mold for molding the metal pipe material 40 into a metal pipe, and is a lower mold 11 (first mold) and an upper mold 12 facing each other in the vertical direction (first direction). (Second type) is provided. Further, the molding die 2 includes a pair of lateral dies 14 and 15 (third dies) facing each other in the width direction (see FIG. 3). The detailed shapes of the molds 11, 12, 14, and 15 will be described later.
- the lower mold 11 and the upper mold 12 are made of steel blocks.
- the lower mold 11 is fixed to the base 13 via a die holder or the like.
- the upper mold 12 is fixed to the slide of the drive mechanism 3 via a die holder or the like.
- the drive mechanism 3 is a mechanism for moving at least one of the lower mold 11 and the upper mold 12.
- the drive mechanism 3 has a configuration in which only the upper mold 12 is moved.
- the drive mechanism 3 includes a slide 21 that moves the upper mold 12 so that the lower mold 11 and the upper mold 12 meet each other, and a pull-back cylinder as an actuator that generates a force for pulling the slide 21 upward.
- a 22 is provided, a main cylinder 23 as a drive source for downwardly pressurizing the slide 21, and a drive source 24 for applying a driving force to the main cylinder 23.
- the holding portion 4 is a mechanism for holding the metal pipe material 40 arranged between the lower mold 11 and the upper mold 12.
- the holding portion 4 includes a lower electrode 26 and an upper electrode 27 that hold the metal pipe material 40 on one end side in the longitudinal direction of the molding die 2, and a metal pipe material on the other end side in the longitudinal direction of the molding die 2.
- a lower electrode 26 and an upper electrode 27 holding the 40 are provided.
- the lower electrodes 26 and the upper electrodes 27 on both sides in the longitudinal direction hold the metal pipe material 40 by sandwiching the vicinity of the end portion of the metal pipe material 40 from the vertical direction.
- Grooves having a shape corresponding to the outer peripheral surface of the metal pipe material 40 are formed on the upper surface of the lower electrode 26 and the lower surface of the upper electrode 27.
- the lower electrode 26 and the upper electrode 27 are provided with a drive mechanism (not shown), and can move independently in the vertical direction.
- the heating unit 5 heats the metal pipe material 40.
- the heating unit 5 is a mechanism for heating the metal pipe material 40 by energizing the metal pipe material 40.
- the heating unit 5 is the metal pipe material in a state where the metal pipe material 40 is separated from the lower mold 11 and the upper mold 12 between the lower mold 11 and the upper mold 12. 40 is heated.
- the heating unit 5 includes the lower electrodes 26 and the upper electrodes 27 on both sides in the longitudinal direction described above, and a power supply 28 for passing an electric current through the electrodes 26 and 27 to the metal pipe material.
- the heating unit 5 may be arranged in the pre-process of the molding apparatus 1 and heated externally.
- the fluid supply unit 6 is a mechanism for supplying a high-pressure fluid into the metal pipe material 40 held between the lower mold 11 and the upper mold 12.
- the fluid supply unit 6 supplies a high-pressure fluid to the metal pipe material 40 which has become hot due to being heated by the heating unit 5, and expands the metal pipe material 40.
- the fluid supply unit 6 is provided on both ends of the molding die 2 in the longitudinal direction.
- the fluid supply unit 6 is a nozzle 31 that supplies fluid from the opening at the end of the metal pipe material 40 to the inside of the metal pipe material 40, and a drive that moves the nozzle 31 forward and backward with respect to the opening of the metal pipe material 40.
- a mechanism 32 and a supply source 33 for supplying a high-pressure fluid into the metal pipe material 40 via the nozzle 31 are provided.
- the nozzle 31 is brought into close contact with the end of the metal pipe material 40 in a state where the sealing property is ensured during fluid supply and exhaust (see FIG. 2), and at other times, the nozzle 31 is brought into close contact with the end of the metal pipe material 40.
- the fluid supply unit 6 may supply a gas such as high-pressure air or an inert gas as the fluid. Further, the fluid supply unit 6 may be the same device including the heating unit 5 together with the holding unit 4 having a mechanism for moving the metal pipe material 40 in the vertical direction.
- FIG. 2 is a cross-sectional view showing a state when the nozzle 31 seals the metal pipe material 40.
- the nozzle 31 is a cylindrical member into which the end portion of the metal pipe material 40 can be inserted.
- the nozzle 31 is supported by the drive mechanism 32 so that the center line of the nozzle 31 coincides with the reference line SL1.
- the inner diameter of the supply port 31a at the end of the nozzle 31 on the metal pipe material 40 side substantially coincides with the outer diameter of the metal pipe material 40 after expansion molding.
- the nozzle 31 supplies a high-pressure fluid to the metal pipe material 40 from the internal flow path 36.
- An example of a high-pressure fluid is gas or the like.
- the cooling unit 7 is a mechanism for cooling the molding die 2. By cooling the molding die 2, the cooling unit 7 can rapidly cool the metal pipe material 40 when the expanded metal pipe material 40 comes into contact with the molding surface of the molding die 2.
- the cooling unit 7 includes a flow path 36 formed inside the lower mold 11 and the upper mold 12, and a water circulation mechanism 37 that supplies and circulates cooling water to the flow path 36.
- the control unit 8 is a device that controls the entire molding device 1.
- the control unit 8 controls the drive mechanism 3, the holding unit 4, the heating unit 5, the fluid supply unit 6, and the cooling unit 7.
- the control unit 8 repeatedly performs an operation of molding the metal pipe material 40 with the molding die 2.
- control unit 8 controls, for example, the transfer timing from a transfer device such as a robot arm, and puts the metal pipe material 40 between the lower mold 11 and the upper mold 12 in the open state. Deploy. Alternatively, the control unit 8 may wait for the operator to manually arrange the metal pipe material 40 between the lower mold 11 and the upper mold 12. Further, the control unit 8 supports the metal pipe material 40 with the lower electrodes 26 on both sides in the longitudinal direction, and then lowers the upper electrode 27 to sandwich the metal pipe material 40, such as an actuator of the holding unit 4. Control. Further, the control unit 8 controls the heating unit 5 to energize and heat the metal pipe material 40. As a result, an axial current flows through the metal pipe material 40, and the electric resistance of the metal pipe material 40 itself causes the metal pipe material 40 itself to generate heat due to Joule heat.
- a transfer device such as a robot arm
- the control unit 8 controls the drive mechanism 3 to lower the upper mold 12 and bring it closer to the lower mold 11 to close the mold 2.
- the control unit 8 controls the fluid supply unit 6 to seal the openings at both ends of the metal pipe material 40 with the nozzle 31 and supply the fluid.
- the metal pipe material 40 softened by heating expands and comes into contact with the molding surface of the molding die 2.
- the metal pipe material 40 is molded so as to follow the shape of the molding surface of the molding die 2.
- the metal pipe material 40 is quenched by quenching with the molding die 2 cooled by the cooling unit 7.
- the metal pipe 41 molded by the molding die 2 will be described with reference to FIG. 4 (b).
- the metal pipe 41 has a hollow pipe portion 41a and flange portions 41b and 41c protruding from both sides in the width direction.
- the pipe portion 41a has a rectangular tubular shape.
- the shape of the pipe portion 41a is not particularly limited, and may be any shape depending on the intended use.
- the flange portions 41b and 41c are configured by crushing both ends of the metal pipe material 40 in the width direction with the dies 11 and 12.
- flange planned portions 40b and 40c the portions scheduled to become the flange portions 41b and 41c after completion are referred to as flange planned portions 40b and 40c (FIG. 4A).
- the protruding portion of the metal pipe 41 after the molding is completed is referred to as a “flange portion”.
- the portion to be the flange portion after completion is referred to as a “planned flange portion”.
- the shape of the "planned flange portion” changes depending on the degree of progress of molding.
- the metal pipe 41 is curved so as to project to one side in the width direction when viewed from the vertical direction.
- the flange portion 41b is arranged on the inner peripheral side
- the flange portion 41c is arranged on the outer peripheral side.
- the lower mold 11 has a flat surface portion 51 extending in the width direction, a recess 52 formed at the center position in the width direction of the flat surface portion 51, and both outer ends in the width direction.
- a support portion 53, 54 formed in the portion is provided.
- the recess 52 is a portion for forming the lower portion of the pipe portion 41a of the metal pipe 41 (see FIG. 4B).
- both sides of the recess 52 in the width direction are configured as molding surfaces for molding the flange portions 41b and 41c (see FIG. 4B).
- the support portions 53 and 54 are portions that protrude upward from the flat surface portion 51.
- the support portion 53 is a portion that supports the lateral mold 14, and the support portion 54 is a portion that supports the lateral mold 15.
- the upper mold 12 includes a flat surface portion 61 extending in the width direction and a molding main body portion 62 protruding downward at the center position in the width direction of the flat surface portion 61.
- the molding main body portion 62 has a substantially trapezoidal cross-sectional shape that narrows downward.
- the molding main body portion 62 has a recess 63 on the lower surface 62a.
- the recess 63 is a portion for forming the upper portion of the pipe portion 41a of the metal pipe 41 (see FIG. 4B).
- the lower surface 62a of the molding main body 62 is configured as a molding surface for molding the flange portions 41b and 41c on both sides of the concave portion 63 in the width direction (see FIG. 4B).
- the molding main body portion 62 has tapered surfaces 62b and 62c that extend outward in the width direction toward the upper flat surface portion 61 from the lower surface portion 62a.
- the mold 14 on the lateral side is arranged on one side of the metal pipe material 40 in the width direction.
- the lateral mold 15 is arranged on the other side of the metal pipe material 40 in the width direction.
- the molds 14 and 15 are molds that regulate the expansion of the planned flange portions 40b and 40c when the planned flange portions 40b and 40c of the metal pipe material 40 expand outward in the width direction.
- the molds 14 and 15 have regulating surfaces 14a and 15a that regulate the spread of the planned flange portions 40b and 40c on the inner side in the width direction.
- tapered surfaces 14b and 15b are formed which are inclined so as to spread outward in the width direction toward the upper side.
- the mold 14 is connected to a gas damper 66 (elastic mechanism) provided on the support portion 53 of the mold 11.
- the gas damper 66 extends inward in the width direction from the support portion 53 and is connected to the mold 14.
- the mold 15 is connected to a gas damper 67 (elastic mechanism) provided on the support portion 54 of the mold 11.
- the gas damper 67 extends inward in the width direction from the support portion 54 and is connected to the mold 15.
- the gas dampers 66 and 67 are elastic mechanisms that apply an elastic force to the molds 14 and 15 on the metal pipe material 40 side in the width direction, that is, inward.
- the molds 14 and 15 are configured so that the lower mold 11 and the upper mold 12 move away from the metal pipe material 40 as they approach each other.
- the molds 14 and 15 move outward in the width direction.
- the molds 14 and 15 move away from the metal pipe material 40 as the mold 11 and the mold 12 approach each other due to the tapered structures 71 and 72 formed between the molds 14 and 15 and the upper mold 12. As such, it moves outward in the width direction.
- the molds 11, 12, 14, and 15 are arranged at positions separated from the metal pipe material 40.
- the molds 14 and 15 are arranged so that the flange portions 41b and 41c (see FIG. 4B) on both sides have the same size in the width direction.
- the molds 14 and 15 are arranged at positions symmetrical with respect to the center position in the width direction of the molding mold 2.
- the inner regulation surfaces 14a and 15a of the molds 14 and 15 in the width direction are arranged at the same distance from the center position in the width direction of the molding mold 2.
- the control unit 8 heats the metal pipe material 40 in this state.
- the control unit 8 lowers the mold 12 downward.
- the mold 12 is lowered to a position where the tapered surfaces 62b and 62c of the mold 12 come into contact with the tapered surfaces 14b and 15b of the molds 14 and 15.
- the control unit 8 controls the fluid supply unit 6 to supply the fluid into the metal pipe material 40 to perform blow molding (primary blow).
- the portions of the flanges 40b and 40c on both sides of the metal pipe material 40 in the width direction expand so as to enter between the flat surface portion 51 of the mold 11 and the lower surface 62a of the mold 12.
- the planned flange portions 40b and 40c come into contact with the regulation surfaces 14a and 15a of the molds 14 and 15, and further deformation to the outside in the width direction is restricted. In this way, when the molds 14 and 15 regulate the flange scheduled portions 40b and 40c on the regulation surfaces 14a and 15a, the deviation of the flange scheduled portions 40b and 40c can be corrected.
- the control unit 8 further lowers the mold 12.
- the tapered surfaces 62b and 62c of the mold 12 also move downward.
- the tapered surfaces 14b and 15b of the molds 14 and 15 are guided by the tapered surfaces 62b and 62c of the mold 12 and move outward in the width direction. Therefore, the regulation surfaces 14a and 15a of the molds 14 and 15 also move outward in the width direction.
- the molds 14 and 15 are maintained in a state of being pressed against the tapered surfaces 62b and 62c of the mold 12 by the elastic force of the gas dampers 66 and 67.
- the planned flange portions 40b and 40c of the metal pipe material 40 are further crushed between the flat surface portion 51 of the mold 11 and the lower surface 62a of the mold 12, so that the dimensions in the width direction are reduced to the mold 12. It gradually increases as the temperature drops.
- the planned flange portions 40b and 40c try to protrude greatly outward in the width direction due to variations, they are regulated by the regulation surfaces 14a and 15a of the molds 14 and 15, and do not become larger than that.
- the planned flange portions 40b and 40c (planned flange portions 40b and 40c that are about to protrude significantly) are formed on the regulation surfaces 14a and 15a. ) Is regulated, it can be said that the deviation of the planned flange portions 40b and 40c is corrected.
- the control unit 8 further lowers the mold 12 so that the molds 11 and 12 are completely closed (bottom dead center) as shown in FIG. 4 (b). At this time, the planned flange portions 40b and 40c are completely crushed, and in this state, the control unit 8 shares the fluid with the metal pipe material 40 by the fluid supply unit 6 so that the recess 52
- the metal pipe 41 is completed by forming the pipe portion 41a corresponding to the shapes of, 63. After that, when the control unit 8 moves the mold 12 upward to open the mold, the molds 14 and 15 return to the positions shown in FIG. 3A due to the restoring force of the gas dampers 66 and 67.
- the state in which the molds 11 and 12 are completely closed corresponds to the state in which the molds 11 and 12 are used to fasten the mold.
- the molds 14 and 15 continue to correct the deviation of the flange scheduled portions 40b and 40c until the mold is tightened.
- the molding die 2 has molds 11 and 12 facing each other in the vertical direction (first direction) in a cross-sectional view. Further, the molding die 2 has molds 14 and 15 arranged on both sides of the metal pipe material 40 in the width direction (second direction) intersecting the vertical direction. The molds 14 and 15 can regulate that the flange scheduled portions 40b and 40c crushed by the molds 11 and 12 among the metal pipe materials 40 spread too much in the width direction. Here, the molds 14 and 15 move away from the metal pipe material 40 as the mold 11 and the mold 12 approach each other.
- the molds 14 and 15 move away from the metal pipe material 40 as the mold 11 and the mold 12 approach each other due to the tapered structures 71 and 72 formed between the molds 14 and 15 and the upper mold 12.
- the molds 14 and 15 can be kept away from the metal pipe material 40 by a simple structure in which the tapered structures 71 and 72 are provided.
- the metal pipe 41 has flange portions 41b and 41c on both sides in the width direction, and the molding die 2 has a pair of dies 14 and 15 arranged on both sides of the metal pipe material 40 in the width direction. In this case, it is possible to reduce variations in the sizes of the flange portions 41b and 41c on both sides of the metal pipe 41.
- the molding apparatus 1 further includes gas dampers 66 and 67 that apply an elastic force to the metal pipe material 40 side in the width direction with respect to the molds 14 and 15.
- the molds 14 and 15 can be returned to their original positions when the molds 11 and 12 are opened without providing an expensive actuator or the like.
- the pair of molds 14 and 15 are arranged so that the flange portions 41b and 41c on both sides have the same size in the width direction. In this case, the sizes of the flange portions 41b and 41c on both sides of the metal pipe 41 can be made the same.
- the molding die 2 molds a metal pipe 41 that is curved when viewed from the vertical direction.
- the sizes of the flange portions 41b and 41c tend to vary between the inner peripheral side and the outer peripheral side of the curve, but the variation can be reduced by adopting the configuration of the present embodiment.
- the molding apparatus 1 further includes a fluid supply unit 6 that supplies a fluid to the heated metal pipe material 40.
- a fluid supply unit 6 that supplies a fluid to the heated metal pipe material 40.
- the sizes of the flange portions 41b and 41c tend to vary due to temperature variations and the like, but by adopting the configuration of the present embodiment, the variations can be reduced.
- the relationship between the curvature of the metal pipe 41 (metal pipe material 40) and the temperature will be explained in more detail.
- FIG. 9A when the metal pipe material 40 is energized and heated, the current density is higher on the inner peripheral side than on the outer peripheral side, and the temperature is higher on the inner peripheral side, so that the heating temperature difference is increased. Occurs. Then, the amount of thermal expansion of the metal pipe material 40 is larger on the inner peripheral side than on the outer peripheral side.
- FIG. 9B when the molds 11 and 12 are closed to form the flange portions 41b and 41c, a compressive force acts on the inner peripheral side and a tensile force acts on the outer peripheral side.
- the flange portion 41b on the inner peripheral side is in a state of excess meat. Therefore, as shown in FIG. 9 (c), the metal pipe 41 is deformed to reduce the bending angle due to the influence of the expansion and contraction in the longitudinal direction and the difference in the amount of thermal expansion, and the center of the pipe is displaced toward the outer peripheral side. It will be easier. Therefore, when the molds 14 and 15 as in the present embodiment are not provided, the flange portion 41b on the inner peripheral side tends to have a larger size in the width direction.
- the molding apparatus 1 since the variations of the flange portions 41b and 41c can be reduced in the molds 14 and 15, the size of the flange portion 41b on the inner peripheral side and the flange portion on the outer peripheral side are reduced.
- the size of 41c can be made uniform. Further, by appropriately adjusting the operation of the molds 14 and 15, the degree of freedom in forming the corner R of the metal pipe 41 having a complicated shape can be improved.
- the molds 14 and 15 continue to correct the deviation of the planned flange portions 40b and 40c until the molds 11 and the molds 12 are used to fasten the molds. Therefore, in the molds 14 and 15, the flange scheduled portions 40b and 40c are displaced even when the mold closing operation of the molds 11 and 12 is progressing and the flange scheduled portions 40b and 40c are being crushed. Can continue to be corrected. From the above, it is possible to reduce variations in the sizes of the flange portions 41b and 41c after completion.
- the present invention is not limited to the above-described embodiment.
- the molds 14 and 15 are arranged so that the size of the flange portion 41b in the width direction and the size of the flange portion 41c in the width direction are the same.
- the pair of molds 14 and 15 may be arranged so that the flange portions 41b and 41c on both sides have predetermined sizes different from each other in the width direction.
- the flange portions 41b and 41c on both sides of the metal pipe 41 can be made into desired sizes, respectively.
- the flange portion 41b may be formed larger than the flange portion 41c.
- the regulation surface 14a of the mold 14 in the initial state, the regulation surface 14a of the mold 14 is outside the regulation surface 15a of the mold 15 with respect to the center position in the width direction of the molding mold 2. Just place it.
- the planned flange portion 40c at the stage of performing the primary blow, the planned flange portion 40c is in contact with the regulation surface 15a, while the planned flange portion 40b is in a state of being separated from the regulation surface 14a. Therefore, the planned flange portion 40c can be expanded while being restricted by the regulation surface 15a, while the planned flange portion 40b can be expanded without being restricted.
- the metal pipe 41 shown in FIG. 6B has a hollow pipe portion 41a and a pair of flange portions 41b, 41c protruding from the pipe portion 41a on both sides in the width direction, and is a pair.
- the sizes of the flange portions 41b and 41c in the width direction are predetermined sizes different from each other.
- the sizes of the pair of flange portions 41b and 41c in the width direction are predetermined sizes different from each other.
- the processing is performed so that the flange portions 41b and 41c have a predetermined size at the time of molding, it is possible to reduce the variation in the sizes of the flange portions 41b and 41c.
- the molds 14 and 15 have the flange scheduled portions 40b and 40c before the molds are tightened by the molds 11 and 12 (FIG. 6 (b)). Continue to correct the deviation.
- the metal pipe 41 has a pair of flange portions 41b, 41c.
- the metal pipe 41 may have a flange portion on only one side in the width direction.
- the metal pipe 41 may have only the flange portion 41b on one side.
- the regulation surface 14a of the mold 14 in the initial state, is more than the regulation surface 15a of the mold 15 with respect to the center position in the width direction of the molding die 2. May be placed on the outside. Further, the recesses 52 and 63 are formed so as to be closer to the right side than the center position.
- the regulation surface 15a is arranged at the position of the right end portion of the recesses 52 and 63.
- the flange scheduled portion 40b comes into contact with the regulation surface 14a, while the right end portion of the pipe portion 40a comes into contact with the regulation surface 15a. Therefore, the flange scheduled portion is not formed on the right side.
- FIG. 8A when the control unit 8 further moves the mold 12 downward, the molds 14 and 15 move outward. The state in which the planned flange portion is not formed on the right side of the pipe portion 40a continues.
- the control unit 8 further moves the mold 12 downward, the flange portion 41b is completed as shown in FIG. 8B.
- the mold 14 corrects the deviation of the planned flange portion 40b before the mold 11 and the mold 12 are used to fasten the mold (FIG. 8 (b)). Continue to do.
- the regulatory molds are provided on both sides in the width direction, but they may be provided on only one side in the width direction.
- the tapered structures 71 and 72 are formed between the molds 14 and 15 and the upper mold 12.
- the tapered structure may be formed between the molds 14 and 15 and the lower mold 11 or between both the molds 11 and 12.
- the gas damper is adopted as the elastic mechanism, but it may be configured by an elastic member or the like as long as it generates an elastic force. Further, the molds 14 and 15 may have a configuration in which the position in the width direction can be controlled by an actuator or the like.
- the mold used in the molding apparatus for STAF has been described as an example.
- the type of the molding apparatus in which the mold according to the present invention is adopted is not particularly limited, and any molding apparatus may be used as long as it supplies a fluid to expand the metal pipe material.
- Molding device 1 ... Molding device, 2 ... Molding mold (molding mold), 6 ... Fluid supply unit, 11 ... Mold (first mold), 12 ... Mold (second mold), 14, 15 ... Mold ( Third type), 40 ... Metal pipe material, 40b, 40c ... Flange planned part, 41b, 41c ... Flange part, 41 ... Metal pipe, 66,67 ... Gas damper (elastic mechanism), 71,72 ... Tapered structure.
Abstract
Description
Claims (11)
- フランジ付きの金属パイプを成形する成形装置であって、
前記金属パイプを成形する成形型と、を備え、
前記成形型は、断面視において、第1の方向に互いに対向する第1の型、及び第2の型を有すると共に、
前記金属パイプ材料のフランジ予定部を規制するための第3の型を有し、
前記第3の型は、前記第1の型と前記第2の型による型締めに至るまでの間に、前記フランジ予定部のズレを矯正し続ける、成形装置。 - 前記第3の型は、前記第1の方向と交差する第2の方向において、金属パイプ材料の少なくとも一方側に配置され、
前記第3の型は、前記第1の型と前記第2の型とが互いに近づくに従って、前記金属パイプ材料から遠ざかる、請求項1に記載の成形装置。 - 前記第3の型は、前記第1の型との間、及び前記第2の型との間の少なくとも一方に形成されたテーパー構造により、前記第1の型と前記第2の型とが互いに近づくに従って、前記金属パイプ材料から遠ざかる、請求項1又は2に記載の成形装置。
- 前記成形型は、前記第1の方向から見て湾曲する前記金属パイプを成形する、請求項1~3の何れか一項に記載の成形装置。
- 前記金属パイプは、前記第1の方向と交差する第2の方向における両側にフランジ部を有し、
前記成形型は、前記第2の方向において、前記金属パイプ材料の両側に配置される一対の前記第3の型を有する、請求項1~4のいずれか一項に記載の成形装置。 - 一対の前記第3の型は、両側の前記フランジ部の前記第2の方向における大きさを同じにするように、それぞれ配置される、請求項5に記載の成形装置。
- 一対の前記第3の型は、両側の前記フランジ部の前記第2の方向における大きさが、互いに異なる所定の大きさとなるように、それぞれ配置される、請求項5に記載の成形装置。
- 加熱された前記金属パイプ材料に流体を供給する流体供給部を更に備える、請求項1~7の何れか一項に記載の成形装置。
- 前記第3の型に対して、前記第1の方向と交差する第2の方向における前記金属パイプ材料側へ弾性力を付与する弾性機構を更に備える、請求項1~8の何れか一項に記載の成形装置。
- 中空のパイプ部と、前記パイプ部から幅方向の両側へ突出する一対のフランジ部と、を有し、
一対の前記フランジ部の前記幅方向における大きさが、互いに異なる所定の大きさとなる、金属パイプ。 - フランジ付きの金属パイプを成形する成形装置であって、
前記金属パイプを成形する成形型と、を備え、
前記成形型は、断面視において、第1の方向に互いに対向する第1の型、及び第2の型を有すると共に、前記第1の方向と交差する第2の方向において、金属パイプ材料の少なくとも一方側に配置される第3の型を有し、
前記第3の型は、前記第1の型と前記第2の型とが互いに近づくに従って、前記金属パイプ材料から遠ざかる、成形装置。
Priority Applications (6)
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CN202180042036.4A CN115867398A (zh) | 2020-08-11 | 2021-08-04 | 成型装置及金属管 |
CA3189000A CA3189000A1 (en) | 2020-08-11 | 2021-08-04 | Molding device and metal pipe |
JP2022542823A JPWO2022034843A1 (ja) | 2020-08-11 | 2021-08-04 | |
EP21855922.7A EP4197665A4 (en) | 2020-08-11 | 2021-08-04 | MOLDING DEVICE AND METAL PIPE |
KR1020227043158A KR20230048624A (ko) | 2020-08-11 | 2021-08-04 | 성형장치, 및 금속파이프 |
US18/149,663 US20230148390A1 (en) | 2020-08-11 | 2023-01-03 | Forming device and metal pipe |
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US18/149,663 Continuation US20230148390A1 (en) | 2020-08-11 | 2023-01-03 | Forming device and metal pipe |
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JP2006175521A (ja) * | 2000-01-14 | 2006-07-06 | Sumitomo Metal Ind Ltd | フランジ付き液圧バルジ加工部品 |
JP2009220141A (ja) | 2008-03-14 | 2009-10-01 | Marujun Co Ltd | パイプ製品の製造方法及び同製造装置 |
WO2017034025A1 (ja) * | 2015-08-27 | 2017-03-02 | 住友重機械工業株式会社 | 成形装置及び成形方法 |
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JP3205105B2 (ja) * | 1993-01-29 | 2001-09-04 | 株式会社チューブフォーミング | 異形曲管の製造方法 |
JP3687838B2 (ja) * | 1999-03-26 | 2005-08-24 | 日産自動車株式会社 | 液圧成形方法、液圧成形型および液圧成形部材 |
JP3854812B2 (ja) * | 2001-03-27 | 2006-12-06 | 新日本製鐵株式会社 | 自動車用強度部材 |
JP6401953B2 (ja) * | 2014-07-15 | 2018-10-10 | 住友重機械工業株式会社 | 成形装置及び成形方法 |
JP6449104B2 (ja) * | 2015-06-02 | 2019-01-09 | 住友重機械工業株式会社 | 成形装置 |
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2021
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JP2006175521A (ja) * | 2000-01-14 | 2006-07-06 | Sumitomo Metal Ind Ltd | フランジ付き液圧バルジ加工部品 |
JP2009220141A (ja) | 2008-03-14 | 2009-10-01 | Marujun Co Ltd | パイプ製品の製造方法及び同製造装置 |
WO2017034025A1 (ja) * | 2015-08-27 | 2017-03-02 | 住友重機械工業株式会社 | 成形装置及び成形方法 |
JP2019072741A (ja) * | 2017-10-17 | 2019-05-16 | リンツリサーチエンジニアリング株式会社 | フランジ付パイプ材の成形方法 |
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KR20230048624A (ko) | 2023-04-11 |
US20230148390A1 (en) | 2023-05-11 |
CA3189000A1 (en) | 2022-02-17 |
EP4197665A1 (en) | 2023-06-21 |
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