WO2011096586A1 - ハイドロフォーム成形方法及びハイドロフォーム成形装置 - Google Patents

ハイドロフォーム成形方法及びハイドロフォーム成形装置 Download PDF

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Publication number
WO2011096586A1
WO2011096586A1 PCT/JP2011/052678 JP2011052678W WO2011096586A1 WO 2011096586 A1 WO2011096586 A1 WO 2011096586A1 JP 2011052678 W JP2011052678 W JP 2011052678W WO 2011096586 A1 WO2011096586 A1 WO 2011096586A1
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WIPO (PCT)
Prior art keywords
pair
molds
hydroform
molding
tube
Prior art date
Application number
PCT/JP2011/052678
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English (en)
French (fr)
Japanese (ja)
Inventor
浩一 佐藤
正昭 水村
Original Assignee
新日本製鐵株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 新日本製鐵株式会社 filed Critical 新日本製鐵株式会社
Priority to BR112012019550-6A priority Critical patent/BR112012019550B1/pt
Priority to JP2011527117A priority patent/JP5182426B2/ja
Priority to CN201180008435.5A priority patent/CN102740991B/zh
Publication of WO2011096586A1 publication Critical patent/WO2011096586A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • 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
    • B21D26/045—Closing or sealing means
    • 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
    • B21D26/035—Deforming tubular bodies including an additional treatment performed by fluid pressure, e.g. perforating
    • 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

Definitions

  • the present invention provides a hydroform molded article obtained by supplying a molding liquid to the inside of a material pipe arranged in a mold to apply an internal pressure and a compressive load in the pipe axis direction.
  • the present invention relates to a foam molding method and a hydrofoam molding apparatus.
  • FIG. 13 is a diagram for explaining a conventional hydroform molding method.
  • upper and lower molds 111 having cavities 114 having substantially the same inner shape as the outer shape obtained by dividing a tubular hydroform molded product in the direction perpendicular to the tube axis;
  • the material pipe 105 is placed in the cavity 114 of the mold 111.
  • the upper and lower molds 111 are clamped.
  • the molding liquid 125 is supplied to the material pipe 105 to apply an internal pressure, and the shaft push punch 151 compresses the material pipe 105 in the tube axis direction.
  • Hydroform molding has the advantage that a reduction in the thickness of the material pipe 105 due to diameter expansion can be compensated by compression of the material pipe 105, and a complicated shape can be molded with high accuracy.
  • FIG. 14 (a) and 14 (b) show an example of such a hydroform molded product 103.
  • This hydroformed product 103 is formed in a cross-sectional shape in which the pipe end portions 103a on both sides in the tube axis direction are narrower inward than the intermediate portion 103b, and the pipe end portion 103a is an intermediate portion having a square cross section.
  • the cross-sectional shape of 103b is formed in a square cross-sectional shape obtained by rotating the cross-sectional shape by approximately 45 ° in the circumferential direction.
  • the cavity 114 of the mold 111 is molded into a shape corresponding to the outer shape of the hydroform molded product 103.
  • the material pipe 105 is directed in the direction P1 as a pre-process for hydroforming so that the material pipe 105 can be placed in the cavity 114 of the mold 111 before the mold 111 is clamped.
  • 105 is pressed to perform press molding.
  • press molding is separately performed as a pre-process of hydroforming, so that it takes time to transfer the intermediate molded product from the press molding die to the hydroforming molding die. It was.
  • a springback occurs in the press molded portion of the intermediate molded product, and the intermediate molded product is placed in the hydroform molding die.
  • pinching problem there was a so-called pinching problem that the mold could not be clamped.
  • the shaft pressing punch 151 is provided with an end surface of the intermediate molded product to enable axial pressing. It has become necessary to perform processing such as cutting and forging separately.
  • a drive device for clamping the mold 111 and two for driving the two axial push punches 151 are provided as a drive mechanism necessary for realizing the hydroform molding.
  • a total of three drive devices, including the drive device, are required, and accordingly, there is a problem of waste of the drive device and enlargement of the molding device.
  • the axial push punch 151 needs to have a shape corresponding to the mold 111 so as to be slidable in the mold 111, that is, substantially the same shape as the outer shape of the pipe end portion 103 a of the hydroform molded product 103. There was an increase in the cost of the entire molding apparatus.
  • the outer diameter is such that it can be fitted in close contact with a part of the cavity 114 of the mold 111.
  • the material tube 105 needs to be used, and the diameter of the material tube 105 that can be disposed in the mold 111 is limited.
  • the present invention has been devised in view of the above-mentioned problems, and the object of the present invention is to press-form the tube end portion of the material pipe together with hydroform molding in order to obtain a hydroform molded product. Even if necessary, the entire process can be performed very easily, the equipment can be simplified and miniaturized, and the degree of freedom in the dimensions of the material pipe can be improved. It is to provide a method and a hydroform molding method.
  • the hydrofoam molding method according to the first aspect of the present invention is provided with a bottomed hole-like cavity having an inlet portion whose diameter is larger than that of the bottom portion, and is tapered between the inlet portion and the bottom portion so as to approach the bottom portion.
  • the hydrofoam molding method according to the second invention is characterized in that, in the first invention, in the press molding step, the tube end portion of the material pipe is press-molded so as to have a contour different from the outer contour thereof.
  • one of the pair of molds in the press molding step, one of the pair of molds is driven toward the other so that the cavity bottom surface of the mold is The protruding backing member is inserted inside the tube end of the material tube.
  • the hydroform molding method according to a fourth aspect of the present invention is the first aspect or the second aspect, wherein the pair of molds provided with a plurality of sets of cavities provided in the pair of molds are used. A plurality of hydroform molded products are obtained through the press molding step and the hydroform molding step.
  • a hydroform molding method is the press molding according to the third aspect, wherein the pair of molds provided with a plurality of sets of cavities provided in the pair of molds are used. A plurality of hydroform molded products are obtained through the process and the hydroform molding process.
  • the hydrofoam molding apparatus is provided with a bottomed hole-shaped cavity having an inlet portion whose diameter is larger than that of the bottom portion, and is tapered between the inlet portion and the bottom portion so as to approach the bottom portion. And a pair of molds disposed so that the inlet portions face each other, and one of the pair of molds is driven toward the other, thereby being disposed in the inlet portion of the pair of molds.
  • a driving means that presses and presses the tube end of the material tube inward by the taper portion; and the material tube in which the tube end surfaces on both sides are in contact with the cavity bottom surfaces of the pair of molds.
  • a molding liquid supply means for supplying an internal pressure by supplying the molding liquid to the liquid.
  • the forming liquid supply means forms the inside of the material pipe in which the pipe end faces on both sides are in contact with the cavity bottom surfaces of the pair of molds.
  • the material tube is hydroformed by applying a compressive load in the tube axis direction by supplying liquid and applying an internal pressure and driving one of the pair of molds toward the other by the driving means. It is characterized by that.
  • the hydroform molding device is the sixth aspect or the seventh aspect, wherein the bottom of the cavity of the pair of molds has an inner contour different from a contour different from an outer contour of the tube end of the material pipe. It is formed so that it may become.
  • a hydroform molding apparatus is the sixth aspect of the invention or the seventh aspect of the invention, wherein the hydroform molding apparatus protrudes from the bottom surface of the cavity of the pair of molds and drives one of the pair of molds toward the other. It further comprises a backing member to be inserted inside the tube end of the material tube.
  • the hydroform molding apparatus projects from the bottom surface of the cavity of the pair of molds, and the tube of the material pipe when one of the pair of molds is driven toward the other. It further comprises a backing member inserted inside the end portion.
  • a hydrofoam molding apparatus is characterized in that, in the sixth or seventh aspect of the invention, the pair of molds is provided with a set of cavities provided in a plurality of sets. To do.
  • the hydrofoam molding apparatus is characterized in that, in the eighth aspect of the invention, the pair of molds are provided with a set of cavities provided in a plurality of sets.
  • the hydrofoam molding apparatus is characterized in that, in the ninth invention, the pair of molds is provided with a set of cavities provided in a plurality of sets.
  • the entire process in order to obtain a hydroformed molded product, the entire process can be performed very easily even when it is necessary to press-form the tube end of the material pipe together with the hydroforming. Accordingly, it is possible to shorten the work time, reduce the burden of work labor, and improve the yield.
  • the number of drive mechanisms required to realize hydroform molding can be reduced, and a shaft push punch is not required, making it possible to simplify and miniaturize the entire hydroform molding device. As a result, it is possible to reduce the manufacturing cost of the hydroform molding apparatus.
  • the pipe end surface of the material pipe is deformed so as to be rounded inward. This makes it possible to normally seal both sides of the material pipe when the pipe end faces on both sides come into contact with the cavity bottom surfaces of the pair of molds.
  • FIG. 1 is a diagram illustrating an example of a hydroform molded product obtained by the hydroform molding method according to the first embodiment.
  • FIG. 1A is a perspective view.
  • FIG. 1B is a plan view.
  • FIG. 1C is a plan sectional view.
  • FIG.1 (d) is a plane sectional view which shows the relationship between a hydroform molded article and a raw material pipe
  • FIG. 2 is a diagram illustrating a configuration of the hydroform molding apparatus according to the first embodiment.
  • FIG. 2A is a side sectional view.
  • FIG.2 (b) is sectional drawing which follows the AA line of Fig.2 (a).
  • FIG.2 (c) is sectional drawing which follows the BB line of Fig.2 (a).
  • FIG. 3 is a diagram illustrating a hydroform molding method according to the first embodiment.
  • FIG. 3A is a side cross-sectional view showing a state in which the material pipe is arranged in the cavity of the mold.
  • FIG.3 (b) is side surface sectional drawing which shows the state in the middle of press-molding the pipe
  • FIG. 4 is a diagram illustrating a hydroform molding method according to the first embodiment.
  • Fig.4 (a) is side surface sectional drawing which shows the state after press-molding the pipe
  • FIG.4 (b) is sectional drawing which follows the CC line
  • FIG.4 (c) is sectional drawing which follows the DD line
  • FIG. 5 is a diagram illustrating a hydroform molding method according to the first embodiment.
  • Fig.5 (a) is side surface sectional drawing which shows the state which supplied the molding liquid inside the raw material pipe
  • FIG.5 (b) is side surface sectional drawing which shows the state after carrying out the hydroform shaping
  • FIG. 6 is a diagram showing a configuration of a hydroform molding apparatus according to the second embodiment.
  • FIG. 6A is a side sectional view.
  • FIG. 6B is a plan view.
  • FIG. 7 is a view showing a configuration of a hydroform molding apparatus according to the third embodiment.
  • FIG. 7A is a side sectional view.
  • FIG.7 (b) is sectional drawing which follows the EE line
  • FIG. 8 is a diagram illustrating a hydroform molding method according to the third embodiment.
  • Fig.8 (a) is side sectional drawing which shows the state in the middle of press-molding the pipe
  • FIG.8 (b) is side surface sectional drawing which shows the state after press-molding.
  • FIG.8 (c) is sectional drawing which follows the FF line
  • FIG. 9 is a view showing an example of a hydrofoam molded product obtained by the hydrofoam molding method according to the fourth embodiment.
  • FIG. 9A is a perspective view.
  • FIG. 9B is a plan view.
  • FIG. 9A is a perspective view.
  • FIG. 9B is a plan view.
  • FIG. 9A is a perspective view.
  • FIG. 9B is a plan view. FIG.
  • FIG. 9C is a plan sectional view.
  • FIG. 9D is a cross-sectional plan view showing the relationship between the hydroformed molded product and the material pipe.
  • FIG. 10 is a diagram showing a configuration of a hydroform molding apparatus according to the fourth embodiment.
  • FIG. 10A is a side sectional view.
  • FIG.10 (b) is sectional drawing which follows the GG line of Fig.10 (a).
  • FIG.10 (c) is sectional drawing which follows the HH line
  • FIG. 11 is a view showing an example of a hydroform molded product obtained by the hydroform molding method according to the fifth embodiment.
  • FIG. 10A is a perspective view.
  • FIG. 11B is a plan view.
  • FIG. 11C is a plan sectional view.
  • FIG.11 (d) is a plane sectional view which shows the relationship between a hydroform molded article and a raw material pipe
  • FIG. 12 is a view showing a configuration of a hydroform molding apparatus according to the fifth embodiment.
  • FIG. 12 is a side sectional view.
  • FIG.12 (b) is sectional drawing which follows the II line
  • FIG.12 (c) is sectional drawing which follows the JJ line
  • FIG. 13 is a diagram for explaining a conventional hydroform molding method.
  • FIG. 14 is a diagram showing an example of a hydroformed molded product.
  • FIG. 14A is a perspective view.
  • FIG. 14B is a plan view.
  • FIG.14 (c) is a figure for demonstrating the press molding performed in order to obtain a hydrofoam molded article.
  • FIG. 1 is a view showing an example of a hydroform molded product 3 obtained by the hydroform molding method according to the first embodiment.
  • FIG. 1A is a perspective view thereof.
  • FIG. 1B is a plan view.
  • FIG. 1C is a plan sectional view.
  • FIG. 1 (d) is a plan sectional view showing the relationship between the hydroformed molded product 3 and the material pipe 5.
  • the hydrofoam molded product 3 obtained by the hydrofoam molding method according to the present invention is formed in a tubular shape in which the intermediate part 3b is expanded in diameter from the pipe end parts 3a on both sides. Between the tube end portion 3a and the intermediate portion 3b, a tapered portion 3c provided in a smooth taper shape so as to approach the cross-sectional shape of the intermediate portion 3b from the cross-sectional shape of the tube end portion 3a is formed.
  • the intermediate portion 3b of the hydroform molded product 3 is formed in a shape in which a part or all of the pipe end portion 3a in the circumferential direction is enlarged in diameter, and the taper portion 3c of the hydroform molded product 3 has a taper degree in the circumferential direction. The taper is formed differently depending on the region, or the degree of taper is the same regardless of the region in the circumferential direction.
  • Such a hydroform molded product 3 is used as a framework of, for example, a building or an automobile.
  • the hydroform molded product 3 according to the first embodiment has an intermediate portion 3b formed in a square cross section, and pipe end portions 3a on both sides thereof have a square cross section obtained by rotating the cross sectional shape of the intermediate portion 3b by approximately 45 ° in the circumferential direction. It is formed in a shape.
  • the hydrofoam molded article 3 according to the first embodiment is formed in a shape in which the intermediate portion 3b is expanded in diameter in the entire circumferential range with respect to the tube end portion 3a.
  • the taper portion 3c of the hydroformed product 3 in the first embodiment is strongly tapered at a position along the tube axis direction from the corner portion 3d formed by the cross-sectional shape of the intermediate portion 3b, and the corner portion formed by the cross-sectional shape of the intermediate portion 3b.
  • the taper is weakly formed at a position along the tube axis direction from the intermediate position between 3d.
  • a material pipe 5 having a shape expanded in diameter in part or in the circumferential direction is used.
  • the material pipe 5 is formed such that the outer contour of the pipe end 5 a is different from the outer contour of the pipe end 3 a of the hydroformed product 3.
  • FIG. 2 is a diagram showing a configuration of the hydroform molding apparatus 1 according to the first embodiment.
  • FIG. 2A is a side sectional view.
  • FIG.2 (b) is sectional drawing which follows the AA line of Fig.2 (a).
  • FIG.2 (c) is sectional drawing which follows the BB line of Fig.2 (a).
  • the hydroform molding apparatus 1 is disposed in a pair of molds 11, a drive device 21 as a drive unit that drives one of the pair of molds 11 toward the other, and the pair of molds 11. And a molding liquid supply device 23 as a molding liquid supply means for supplying the molding liquid to the inside of the material pipe 5 and applying an internal pressure.
  • the pair of molds 11 is used as one that performs both press molding and hydroform molding of the material pipe 5 by the same mold.
  • Each of the pair of molds 11 is provided with a bottomed hole-like cavity 14 in which the inlet portion 15 has a diameter larger than that of the bottom portion 16.
  • a tapered portion 17 is formed between the inlet portion 15 and the bottom portion 16 so as to have a smooth taper shape so as to approach the inner shape of the bottom portion 16 from the inner shape of the inlet portion 15.
  • the bottom 16 means the endmost part of the cavity 14 that is the part farthest from the facing surface 12 described later.
  • the pair of molds 11 are arranged so that the respective cavities 14 are concentrically arranged with the respective inlet portions 15 facing each other.
  • the pair of cavities 14 provided in each of the pair of molds 11 has an inner shape that is the outer shape of the hydroform molded product 3 when the opposing surfaces 12 of the pair of molds 11 that face each other are brought into contact with each other. And so as to have substantially the same shape.
  • the inner shape of the bottom 16 of the cavity 14 is formed to be substantially the same as the outer shape of the pipe end 3 a of the hydroform molded product 3, and the inner shape of the inlet portion 15 of the cavity 14 is the middle of the hydroformed molded product 3.
  • the outer shape of the tapered portion 17 of the cavity 14 is formed so as to have substantially the same shape as the outer shape of the tapered portion 3c of the hydroform molded product 3. .
  • the inlet portion 15 of the cavity 14 is formed in a shape in which a part or all of the circumferential direction of the bottom portion 16 of the cavity 14 is expanded in diameter, and the tapered portion 17 of the cavity 14 is a region where the degree of taper is in the circumferential direction.
  • the taper degree is formed in the same manner regardless of the circumferential portion.
  • the cavity 14 in the first embodiment has an inlet portion 15 formed in a square cross section, and a bottom portion 16 formed in a square cross section obtained by rotating the cross sectional shape of the inlet portion 15 by approximately 45 ° in the circumferential direction.
  • the tapered portion 17 of the cavity 14 in the first embodiment is strongly tapered at a position along the axial direction from the corner portion 15a formed by the cross-sectional shape of the inlet portion 15, and between the corner portions 15a formed by the cross-sectional shape of the inlet portion 15.
  • the taper is weakly formed at a position along the tube axis direction from the intermediate position.
  • the driving device 21 drives one mold 11 toward and away from the other mold 11 and is composed of, for example, a hydraulic cylinder, a pneumatic cylinder, an electric motor, or the like.
  • the drive device 21 in the first embodiment is configured to drive the right mold 11 in FIG. 2 toward the left mold 11.
  • the molding liquid supply device 23 supplies a molding liquid such as water into the cavity 14 through a molding liquid supply hole 19 formed in the cavity bottom surface 18 of the mold 11.
  • a molding liquid supply hole 19 is formed in the cavity 14 of the mold 11 that is not driven by the driving device 21.
  • the cavity bottom surface 18 means the endmost surface farthest from the facing surface 12.
  • the material tube 5 is placed in the cavity 14 of the pair of molds 11. Specifically, as shown in FIG. 3A, one of the pair of molds 11 is driven to leave a space between the opposing surfaces 12, and the pipe ends 5 a of the material pipe 5 are paired. It is inserted into the inlet portion 15 through the opening 13 in any of the molds 11.
  • the material pipe 5 inserted into the inlet part 15 of the mold 11 has its pipe end surface 5b abutted against the taper part 17 of the cavity 14 to prevent further insertion.
  • the material pipe 5 used here a metal pipe body such as a steel pipe or an aluminum pipe is used.
  • the material pipe 5 is formed in a shape whose diameter is partially or entirely expanded in the circumferential direction from the inner shape of the bottom portion 16 of the cavity 14 and has a size that can be inserted into the inlet portion 15 of the cavity 14.
  • the cross-sectional shape is not limited to a circular shape as in the first embodiment.
  • the pipe end 5a of the material pipe 5 is press-molded.
  • the driving device 21 drives one of the pair of molds 11 toward the other.
  • the material pipes 5 that are in contact with the taper portions 17 of the cavities 14 are contacted.
  • a load that presses inward by the tapered portion 17 acts on a part or all of the circumferential direction, and passes through the tapered portion 17 of the cavity 14 from the tube end portion 5a side of the material tube 5 toward the intermediate portion 5c side. The part is gradually pressed.
  • FIG. 4B is a cross-sectional view taken along the line CC in FIG. FIG.4 (c) is sectional drawing which follows the DD line
  • the pair of molds 11 is formed between the opposing surfaces 12 of the pair of molds 11 when the pipe end surfaces 5b on both sides of the material pipe 5 are brought into contact with the cavity bottom surfaces 18 of the pair of molds 11, respectively.
  • the interval L1 is adjusted to be freed. By adjusting the distance L1 between the opposing surfaces 12, the pressing amount of the mold 11 in the hydroform molding described later can be adjusted.
  • the tube end surface 5b of the material tube 5 becomes an irregular shape by press-molding the tube end portion 5a of the material tube 5.
  • the drive device 21 directs one of the pair of molds 11 to the other. Further driving is preferable.
  • a compressive load in the tube axis direction is applied to the tube end surface 5b of the material tube 5 by the cavity bottom surface 18 so that the tube end surface 5b of the material tube 5 can be formed flat. Can be sufficiently sealed.
  • the material pipe 5 is hydroformed. Specifically, as shown in FIG. 5 (a), the forming liquid supply device 23 applies the material pipe 5 in which the pipe end faces 5b on both sides are in contact with the cavity bottom faces 18 of the pair of molds 11 to each other.
  • the molding liquid 25 is supplied inside to apply an internal pressure, and one of the pair of molds 11 is driven toward the other by the driving device 21 to apply a compressive load in the tube axis direction.
  • the material pipe 5 is expanded in diameter along the inner shape of the set of cavities 14 while being compressed in the pipe axis direction. Hydroform molding performed while driving the pair of molds 11 by the driving device 21 is performed until the opposing surfaces 12 of the pair of molds 11 are in contact with each other.
  • the material tube 5 is brought into close contact with the set of cavities 14 and further conforms to the inner shape of the set of cavities 14.
  • the material pipe 5 is formed.
  • one of the pair of molds 11 is driven to leave a space between the opposing surfaces 12, and then the hydroformed molded product 3 molded from the cavity 14 is removed to complete a series of work steps. .
  • press molding and hydroform molding can be continuously performed by the same mold 11, and it is troublesome to transfer an intermediate molded product from a press mold to a hydroform mold. Can be omitted.
  • the tube end surface 5b of the material tube 5 becomes distorted during press molding, the tube end surface 5b can be flattened by driving one of the pair of molds 11 toward the other. Thus, processing such as cutting and forging that has been performed separately can be omitted.
  • the driving device 21 that drives one of the pair of molds 11 toward the other as a driving mechanism necessary for realizing the hydroforming, and the axial push punch. Therefore, it is possible to simplify and reduce the size of the entire hydroform molding apparatus 1 and to reduce the manufacturing cost of the entire hydroform molding apparatus 1.
  • the work can be performed without being greatly restricted by the diameter of the material pipe 5, and the degree of freedom of the dimensions of the material pipe 5 that can be arranged in the mold 11 is improved. Is possible. For this reason, for example, when obtaining a hydroformed molded product 3 having a desired size, even if a material pipe 5 having a large thickness and a small outer diameter is used, a material having a small thickness and a large outer diameter is used. It is possible to obtain a hydroformed molded product having the same dimensions. In addition to this, for example, by using only the same pair of molds 11 and changing only the dimensions of the material pipe 5, it is possible to obtain hydroformed molded articles 3 having different thicknesses. That is, according to the present invention, the degree of freedom in design can be improved.
  • FIG. 6 is a diagram showing a configuration of the hydroform molding apparatus 1 according to the second embodiment.
  • FIG. 6A is a side sectional view.
  • FIG. 6B is a plan view.
  • a plurality of a pair of molds 11 provided at intervals in the vertical direction are provided at intervals in the horizontal direction.
  • a plurality of pairs of molds 11 are provided two-dimensionally at intervals in the left-right direction and the depth direction.
  • one set of cavities 14 is provided over a plurality of sets.
  • the plurality of upper molds 11 are attached to the lower mold holder 31, and the plurality of lower molds 11 are attached to the upper mold holder 33.
  • the upper mold holder 33 can be driven up and down by a driving device (not shown).
  • the lower mold holder 31 communicates with the molding liquid supply hole 19 of the mold 11 so that the molding liquid is supplied into the cavity 14 of the lower mold 11 through the molding liquid supply hole 19 of the mold 11.
  • a molding liquid supply hole 35 is formed.
  • a plurality of hydroform molded products 3 are obtained by performing a press molding process and a hydrofoam process in the same manner as in the first embodiment using each set of cavities 14. Can be obtained. Thereby, it becomes possible to mass-produce the hydroform molded product 3 in a short time.
  • FIG. 7 is a diagram showing a configuration of the hydroform molding apparatus 1 according to the third embodiment.
  • FIG. 7A is a side sectional view.
  • FIG.7 (b) is sectional drawing which follows the EE line
  • the hydroform molding apparatus 1 further includes a backing member 41 protruding from the cavity bottom surface 18 of the mold 11.
  • the backing member 41 has an inner periphery of the bottom portion 16 of the cavity 14 such that the tube end portion 5a of the material pipe 5 is inserted between the inner peripheral surface of the bottom portion 16 of the cavity 14 and the outer peripheral surface of the backing member 41. It is provided at an interval over the entire range in the circumferential direction with respect to the surface.
  • the backing member 41 has an outer peripheral surface similar to the inner shape of the bottom 16 of the cavity 14.
  • the backing member 41 in the third embodiment communicates with the molding liquid supply hole 19 of the mold 11 so that the molding liquid is supplied into the cavity 14 through the molding liquid supply hole 19 of the mold 11 by the molding liquid supply device 23.
  • the formed liquid supply hole 43 is formed.
  • the backing member 41 is formed on both the pair of molds 11.
  • the hydroform molding method according to the third embodiment is different from the hydroform molding method according to the first embodiment only in the press molding process.
  • the drive device 21 drives one of the pair of molds 11 toward the other, thereby causing the cavity 14 to move from the tube end 5a side to the intermediate portion 5c side of the material pipe 5.
  • the portion that has passed through the tapered portion 17 is gradually press-molded.
  • the tube end surface 5 b of the material tube 5 is rolled inward, and the tube end surface 5 b of the material tube 5 is normal to the cavity bottom surface 18. There is a risk that both ends of the material tube 5 will not be sealed.
  • the taper portion 17 of the cavity 14 is driven by driving one of the pair of molds 11 toward the other.
  • the backing member 41 is inserted inside the tube end portion 5a of the material tube 5 while the tube end portion 5a of the material tube 5 is press-formed.
  • FIG. 9 is a view showing an example of a hydroform molded product 3 obtained by the hydroform molding method according to the fourth embodiment.
  • FIG. 9A is a perspective view.
  • FIG. 9B is a plan view.
  • FIG. 9C is a plan sectional view.
  • FIG. 9 (d) is a plan sectional view showing the relationship between the hydroformed molded product 3 and the material pipe 5.
  • Fig.10 (a) is a figure which shows the structure of the hydroform shaping
  • FIG. 10A is a side sectional view.
  • FIG.10 (b) is sectional drawing which follows the GG line of Fig.10 (a).
  • FIG.10 (c) is sectional drawing which follows the HH line
  • the intermediate portion 3b is formed in a substantially square shape, and the pipe end portions 3a on both sides thereof rotate the cross-sectional shape of the intermediate portion 3b by 45 ° in the circumferential direction.
  • the side surface portion 3f formed between the corner portions 3e formed by the rectangular cross section has a rectangular shape and is recessed inwardly.
  • the tapered portion 3c of the hydroform molded product 3 according to the third embodiment is strongly tapered at a position along the tube axis direction from the corner portion 3d formed by the cross-sectional shape of the intermediate portion 3b, and the corner portion formed by the cross-sectional shape of the intermediate portion 3b. It is formed so that there is almost no taper at a position along the tube axis direction from the intermediate position between 3d.
  • the hydroform molding apparatus 1 has a cross section in which the inlet portion 15 of the cavity 14 is formed in a square cross section, and the bottom portion 16 of the cavity 14 rotates the cross sectional shape of the inlet portion 15 by approximately 45 ° in the circumferential direction.
  • the side surfaces 16b formed between the corners 16a having a rectangular cross section are formed in a shape that is inwardly curved and recessed.
  • the tapered portion 17 of the cavity 14 in the fourth embodiment is strongly tapered at a position along the axial direction from the corner portion 15a formed by the cross-sectional shape of the inlet portion 15, and between the corner portions 15a formed by the cross-sectional shape of the inlet portion 15. It is formed so that there is almost no taper at a position along the axial direction from the intermediate position.
  • the material tube 5 is a hydroform molding according to the first embodiment, except that a circular tube having the same outer diameter as the maximum diameter of the inner shape of the bottom 16 of the cavity 14 is used. Perform the same steps as the method.
  • FIG. 10 is a view showing an example of a hydroform molded product 3 obtained by the hydroform molding method according to the fifth embodiment.
  • FIG. 10A is a perspective view.
  • FIG. 10B is a plan view thereof.
  • FIG. 10C is a plan sectional view.
  • FIG. 10D is a plan sectional view showing the relationship between the hydroform molded product 3 and the material pipe 5.
  • FIG. 11 is a diagram showing a configuration of the hydroform molding apparatus 1 according to the fifth embodiment.
  • FIG. 11A is a side sectional view.
  • FIG.11 (b) is the II sectional view taken on the line of Fig.11 (a).
  • FIG.11 (c) is sectional drawing which follows the JJ line
  • the hydroform molded product 3 according to the fifth embodiment has an intermediate portion 3b formed in a substantially circular shape, and pipe end portions 3a on both sides thereof are formed in a substantially circular shape having a smaller diameter than the intermediate portion 3b.
  • the tapered portion 3c of the hydrofoam molded product 3 in the fifth embodiment is formed in the same manner regardless of the degree of taper in the circumferential direction.
  • the inlet portion 15 of the cavity 14 is formed in a circular cross section, and the bottom portion 16 of the cavity 14 is formed in a circular cross section having a smaller diameter than the cross sectional shape of the inlet portion 15. .
  • the taper portion 17 of the cavity 14 in the fifth embodiment is formed in the same manner regardless of the degree of taper in the circumferential direction.
  • the material tube 5 is the first embodiment except that a circular tube having an outer diameter larger than the inner diameter of the bottom portion 16 of the cavity 14 and smaller than the inner diameter of the inlet portion 15 of the cavity 14 is used. The same process as the hydroforming method according to the above is performed.
  • the shape of the hydroform molded product 3 and the cavity 14 of the mold 11 are not particularly limited as long as the intended effect of the present invention is obtained.
  • the case where the intermediate portion 3b of the hydroform molded product 3 and the inlet portion 15 of the cavity 14 are configured as the same shape regardless of the position in the tube axis direction has been described.
  • the diameter may be further expanded.
  • the cavity 14 of the mold 11 has an overall depth of 50 to 500 mm, an inner diameter of the inlet portion 15 of 20 to 100 mm, The inner diameter of the bottom 16 may be 30 to 150 mm.
  • the driving force by the driving device 21 during press molding is 500 to 1000 kN, and the distance L1 between the opposing surfaces 12 of the pair of molds 11 in FIG.
  • the driving force by the driving device 21 during hydroforming is 500 to 10000 kN, and the internal pressure due to the molding liquid is 30 to 300 Pa.
  • the entire process can be performed very easily even when it is necessary to press-form the pipe end of the material pipe together with the hydroforming. Therefore, it is possible to shorten the work time, reduce the work labor load, and improve the yield.
  • the number of drive mechanisms can be reduced, and a shaft pressing punch is not required, so that the entire hydroform molding apparatus can be simplified and downsized. Therefore, the manufacturing cost of the hydroform molding device can be reduced. Therefore, the present invention has a high utility value in the industry.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
PCT/JP2011/052678 2010-02-04 2011-02-02 ハイドロフォーム成形方法及びハイドロフォーム成形装置 WO2011096586A1 (ja)

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BR112012019550-6A BR112012019550B1 (pt) 2010-02-04 2011-02-02 Método de hidroformação e dispositivo de hidroformação.
JP2011527117A JP5182426B2 (ja) 2010-02-04 2011-02-02 ハイドロフォーム成形方法及びハイドロフォーム成形装置
CN201180008435.5A CN102740991B (zh) 2010-02-04 2011-02-02 液压成形方法和液压成形装置

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CN104338818A (zh) * 2013-08-01 2015-02-11 浙江摩多巴克斯汽配有限公司 一种内高压成形设备

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JP6182026B2 (ja) * 2013-09-10 2017-08-16 住友理工株式会社 樹脂ホースの製造方法
CN106270103B (zh) * 2016-09-30 2018-06-26 宁波市沃瑞斯机械科技有限公司 一种内高压成型模具及其使用方法
CN110560544B (zh) * 2019-10-17 2021-02-09 哈尔滨工业大学（威海） 一种大截面差空心结构件轴压胀锻工艺方法

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JP2001205366A (ja) * 2000-01-24 2001-07-31 Nippon Yakin Kogyo Co Ltd テーパー管の製造機及びその製造方法
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BR112012019550B1 (pt) 2020-05-26
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CN102740991B (zh) 2014-11-12
JPWO2011096586A1 (ja) 2013-06-13

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