WO2020012614A1 - Matrice métallique - Google Patents

Matrice métallique Download PDF

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Publication number
WO2020012614A1
WO2020012614A1 PCT/JP2018/026385 JP2018026385W WO2020012614A1 WO 2020012614 A1 WO2020012614 A1 WO 2020012614A1 JP 2018026385 W JP2018026385 W JP 2018026385W WO 2020012614 A1 WO2020012614 A1 WO 2020012614A1
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WO
WIPO (PCT)
Prior art keywords
heat medium
mold
flow path
solid
medium flow
Prior art date
Application number
PCT/JP2018/026385
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English (en)
Japanese (ja)
Inventor
亮太 伊藤
晋平 武田
章弘 鈴木
易見 山村
Original Assignee
ヤマハ発動機株式会社
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 ヤマハ発動機株式会社 filed Critical ヤマハ発動機株式会社
Priority to PCT/JP2018/026385 priority Critical patent/WO2020012614A1/fr
Publication of WO2020012614A1 publication Critical patent/WO2020012614A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/22—Moulds for peculiarly-shaped castings
    • B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/16—Both compacting and sintering in successive or repeated steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y80/00—Products made by additive manufacturing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/10—Cylinders; Cylinder heads  having cooling means for liquid cooling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present invention relates to a mold, and more particularly, to a mold formed by an additional manufacturing technique.
  • a cylinder block of an internal combustion engine is manufactured by casting using a mold.
  • a thin portion (a portion having a small thickness) of the mold has a small heat capacity, and thus tends to become high in temperature. Therefore, a cooling water passage for flowing cooling water may be formed in the thin portion.
  • a cooling water flow path is formed in a thin portion for forming a water jacket.
  • the cooling water flow path is formed by machining a mold formed by cutting a solid material or the like using a drill or the like.
  • the inventor of the present application examined manufacturing a mold using a 3D printer.
  • the technology of forming a three-dimensional structure (three-dimensional object) using a 3D printer is called additive manufacturing technology, and has attracted attention in recent years. According to the additional manufacturing technology, even a three-dimensional structure having a complicated shape can be easily manufactured based on 3D CAD data or 3DCG data.
  • the cooling water flow path is also formed at the same time as the mold is manufactured, so unlike the case where the cooling water flow path is formed by machining, the shape and length of the cooling water flow path Has few restrictions. Therefore, it is expected that the cooling capacity in the thin portion of the mold can be improved. Further, it is considered that the use of the additional manufacturing technique makes it possible to manufacture the mold itself in a shorter time and at lower cost than before.
  • Patent Document 1 discloses that a mold for forming a water jacket of a cylinder block is manufactured by an additional manufacturing technique.
  • a mold for forming a water jacket of a cylinder block is manufactured by an additional manufacturing technique.
  • one cooling water flow path is extended long in a thin portion corresponding to the water jacket, thereby increasing the flow path area.
  • the present invention has been made in view of the above problems, and an object of the present invention is to appropriately perform temperature control using a heat medium flow path in a mold formed by an additional manufacturing technique.
  • the mold according to the embodiment of the present invention is a mold formed by an additional manufacturing technique, provided inside the mold, a heat medium flow path through which a heat medium flows, and the heat medium is introduced into the mold. And a medium discharge port through which the heat medium is discharged to the outside of the mold.
  • the heat medium flow path has a two-dimensional honeycomb shape.
  • a region in the mold where the heat medium flow path is provided is divided into a plurality of solid portions arranged in an array by the heat medium flow path in a two-dimensional honeycomb shape. And each of the plurality of solid portions is substantially polygonal, substantially circular, or substantially elliptical.
  • a direction in which the heat medium flows as a whole in the heat medium flow path from the medium introduction port side toward the medium discharge port side is a first direction
  • a direction substantially orthogonal to the first direction is a direction.
  • the plurality of solid parts are a plurality of solid part rows each including two or more solid parts arranged along the second direction
  • the first direction Are arranged so as to form a plurality of solid rows arranged along.
  • the two or more solid portions included in each of the plurality of solid portion rows are arranged at a predetermined pitch P along the second direction, and the plurality of solid portions are Two adjacent solid part rows of the rows are arranged such that the positions of the respective solid parts in the second direction are displaced by substantially half of the pitch P.
  • the heat medium flow path includes a first portion extending substantially parallel to the first direction, and a third direction and a fourth direction symmetric with respect to the first direction from an end of the first portion.
  • a second portion and a third portion each extending substantially parallel to the direction.
  • each of the plurality of solid portions has a substantially hexagonal shape.
  • the mold includes a thin portion having a thickness smaller than at least a part of another portion, and the heat medium flow path includes a portion located in the thin portion.
  • the mold is a mold for forming at least a part of a cylinder block, and the thin portion is a portion corresponding to a water jacket of the cylinder block.
  • the heat medium flow path has a two-dimensional honeycomb shape
  • the heat medium can be uniformly and turbulently flowed into the mold. Therefore, the temperature of the mold can be suitably controlled by the heat medium flow path.
  • the heat medium flow path has a two-dimensional honeycomb shape, it is easy to increase the ratio of the heat medium flow path in the mold. Therefore, it is possible to reduce the amount of raw materials required for manufacturing the mold and to shorten the time required for manufacturing.
  • the fact that the heat medium flow path is in a two-dimensional honeycomb shape means that the inside of the mold is almost uniformly lightened (thinned). Therefore, the residual stress generated at the time of manufacturing (molding) the mold by the additional manufacturing technology can be reduced, so that there is an advantage that deformation such as warpage and generation of a crack can be suppressed.
  • a region in the mold where the heat medium flow path is provided is divided into a plurality of solid portions arranged in an array by the two-dimensional honeycomb heat medium flow path.
  • each of the plurality of solid portions may be substantially polygonal, substantially circular, or substantially elliptical. Regardless of whether each of the solid portions has a substantially polygonal shape, a substantially circular shape, or a substantially elliptical shape, an effect of flowing the heat medium uniformly and as a turbulent flow can be obtained.
  • the plurality of solid parts are a plurality of solid part rows each including two or more solid parts arranged along the second direction, and the plurality of solid part rows arranged along the first direction. May be arranged.
  • each solid part row 2Two or more solid parts included in each solid part row are arranged at a predetermined pitch P along the second direction. From the viewpoint of causing the heat medium to flow uniformly, it is preferable that the two solid part rows adjacent to each other are arranged such that the positions of the respective solid parts in the second direction are shifted by approximately half the pitch P. .
  • the heat medium flow path includes a first portion extending substantially parallel to the first direction, and a second portion extending substantially parallel to third and fourth directions symmetric with respect to the first direction from an end of the first portion. It is preferable to include a portion and a third portion. Since the heat medium flow path is composed of the first part, the second part, and the third part, when the heat medium flowing through the first part reaches an end of the first part, the second part and the second part are formed. Since the probabilities of trying to flow to the three portions are almost equal, it is easier to flow the heat medium uniformly in the mold.
  • Each of the plurality of solid portions has, for example, a substantially hexagonal shape, and more specifically, for example, a substantially regular hexagonal shape.
  • the embodiment of the present invention is suitably used for a mold including a thin portion.
  • the heat medium flow path is arranged to include a portion located in the thin portion.
  • the embodiment of the present invention is suitably used for a mold for forming at least a part of a cylinder block.
  • the thin portion may be a portion corresponding to the water jacket of the cylinder block.
  • FIG. 1 is a perspective view schematically showing a mold 1 according to an embodiment of the present invention.
  • FIG. 2 is a perspective view schematically showing the mold 1, in which a heat medium flow path 10 inside the mold 1 is indicated by a dotted line.
  • FIG. 2 is a perspective view schematically showing a heat medium flow path 10. It is a top view which expands and shows a part of heat medium channel 10.
  • FIG. It is a top view which expands and shows some heat medium flow paths 10 further.
  • FIG. 9 is a plan view showing another example of the shape of the heat medium flow passage 10 (the shape of the solid portion 11).
  • FIG. 9 is a plan view showing still another example of the shape of the heat medium flow passage 10 (the shape of the solid portion 11).
  • FIG. 9 is a plan view showing another example of the shape of the heat medium flow passage 10 (the shape of the solid portion 11).
  • FIG. 9 is a perspective view illustrating another example of the configuration of the heat medium flow channel 10.
  • (A), (b), and (c) are figures which show the result of having verified by simulation how the heat medium flows through the two-dimensional honeycomb-shaped heat medium flow path 10.
  • (A), (b), and (c) are figures which show the result of having verified by simulation how the heat medium flows through the two-dimensional honeycomb-shaped heat medium flow path 10.
  • (A), (b), and (c) are figures which show the result of having verified by simulation how the heat medium flows through the two-dimensional honeycomb-shaped heat medium flow path 10.
  • (A), (b), and (c) are figures which show the result of having verified by simulation how the heat medium flows through the two-dimensional honeycomb-shaped heat medium flow path 10.
  • FIG. 4 is a diagram illustrating another example of the heat medium flow path 10.
  • FIG. 6 is a view showing still another example of the heat medium flow channel 10.
  • FIG. 6 is a view showing still another example of the heat medium flow channel 10.
  • FIG. 1 is a perspective view schematically showing the mold 1.
  • the mold 1 is a nested mold which forms a part of a mold for forming a cylinder block. That is, the mold 1 is a mold for forming a part of the cylinder block.
  • the shape of the entire mold for forming the cylinder block may be any of various known shapes, and a description thereof will not be repeated. Although the case where the number of cylinders is two is illustrated here, the number of cylinders is not limited to two.
  • FIG. 1 shows three directions (X direction, Y direction, and Z direction) orthogonal to each other.
  • the Z direction is a direction parallel to the cylinder axis (indicated by a chain line in FIG. 1).
  • the X direction is a direction parallel to a plane including two cylinder axes and orthogonal to the Z direction.
  • the Y direction is a direction perpendicular to a plane including the two cylinder axes and perpendicular to the Z direction.
  • the Z direction may be referred to as a “vertical direction”, and a direction perpendicular to the Z direction (for example, the X direction or the Y direction) may be referred to as a “horizontal direction”, but these are convenient names.
  • the direction of the mold 1 when the mold 1 is actually used is not limited.
  • the mold 1 is formed by an additional manufacturing technique, as described in detail later.
  • the mold 1 includes a thin portion 2 having a thickness smaller than at least a part of other portions, and a thick portion 3 having a thickness larger than the thin portion 2.
  • the thin portion 2 is a portion corresponding to the water jacket of the cylinder block.
  • the thin portion 2 has a shape formed by connecting a plurality of (here, two) cylinders.
  • the thin portion 2 extends upward from the thick portion 3 along the Z direction (vertical direction).
  • the thick part 3 is located below the thin part 2 and supports the thin part 2.
  • the upper surface 3a of the thick portion 3 defines a gasket surface of the cylinder block.
  • the mold 1 has a heat medium passage (not shown in FIG. 1) provided therein.
  • the heat medium flows through the heat medium flow path, whereby the mold 1 is cooled and / or heated.
  • the heat medium for cooling is, for example, water.
  • the heating medium for heating is, for example, oil.
  • FIG. 2 is a perspective view showing the mold 1 as in FIG. 1, and also shows a heat medium flow path 10 inside the mold 1.
  • FIG. 3 is a perspective view showing the heat medium flow path 10.
  • the mold 1 has a heat medium flow path 10, a medium inlet 4, and a medium outlet 5.
  • the medium introduction port 4 is an entrance of the heat medium, that is, a portion where the heat medium is introduced into the mold 1.
  • the medium discharge port 5 is an outlet of the heat medium, that is, a part where the heat medium is discharged outside the mold 1.
  • the medium inlet 4 and the medium outlet 5 are provided in the thick portion 3 respectively.
  • the medium inlet 4 and the medium outlet 5 are connected to the heat medium flow path 10, respectively.
  • the heat medium flow path 10 includes a portion located in the thin portion 2. In the example shown in FIG. 2, most of the heat medium flow path 10 is located in the thin portion 2.
  • the heat medium flow passage 10 of the present embodiment has a two-dimensional honeycomb shape as shown in FIGS. That is, the heat medium flow path 10 has a two-dimensional network structure in which unit structures having substantially the same shape are arranged without gaps. Since the heat medium flow path 10 has a two-dimensional honeycomb shape, the heat medium can be uniformly and turbulently flow in the mold 1 as described later. Therefore, the temperature control of the mold 1 by the heat medium flow path 10 can be suitably performed.
  • FIG. 4 is an enlarged plan view showing a part of the heat medium flow path 10.
  • a region in the mold 1 where the heat medium flow passages 10 are provided is divided into a plurality of portions (metals) arranged in an array by the two-dimensional honeycomb heat medium flow passages 10.
  • This is a portion where the metal material constituting the mold 1 exists, and is hereinafter referred to as a “solid portion”.
  • the unit structure of the two-dimensional honeycomb has a substantially hexagonal frame shape, more specifically, a substantially regular hexagonal frame shape. Therefore, each solid portion 11 has a substantially hexagonal shape, more specifically, a substantially regular hexagonal shape.
  • the shape of the solid portion 11 is not limited to the shape illustrated here.
  • FIG. 4 shows a direction (hereinafter, referred to as a “first direction”) D1 in which the heat medium flows as a whole in the heat medium flow path 10 from the medium inlet 4 side to the medium outlet 5 side, and a first direction.
  • a direction (hereinafter, referred to as a “second direction”) D2 substantially orthogonal to D1 is shown.
  • the plurality of solid parts 11 are arranged so as to form a plurality of solid part rows 11C.
  • Each solid part row 11C includes two or more solid parts 11 arranged along the second direction D2, and a plurality of solid part rows 11C are arranged along the first direction D1. .
  • solid part rows 11C including four solid parts 11 and solid part rows 11C including three solid parts 11 are alternately arranged. Note that the number of the solid part sequences 11C and the number of the solid parts 11 included in each solid part sequence 11C are not limited to those illustrated in FIG.
  • each solid portion row 11C Two or more solid portions 11 included in each solid portion row 11C are arranged at a predetermined pitch P along the second direction D2.
  • two solid part rows 11C adjacent to each other are arranged such that the positions of the respective solid parts 11 in the second direction D2 are substantially half the pitch P.
  • the heat medium flow passage 10 (that is, the two-dimensional honeycomb-shaped portion) has a plate-shaped wide portion 6 (which extends along the second direction D2 (here, the Z direction)). It is connected to the medium introduction port 4 and the medium discharge port 5 through FIG. 3), but the wide portion 6 may be omitted as described later.
  • FIG. 5 shows a part of the heat medium flow path 10 further enlarged.
  • the heat medium flow path 10 includes a portion (hereinafter, referred to as a “first portion”) 10a extending substantially parallel to the first direction D1 and a first direction D1 extending from an end of the first portion 10a.
  • a portion (hereinafter, referred to as a “second portion”) 10b extending substantially parallel to the third direction D3, and a fourth direction different from the first direction D1 and the third direction D3 from the end of the first portion 10a.
  • a portion (hereinafter, referred to as a "third portion”) 10c extending substantially parallel to D4.
  • the third direction D3 forms an angle of + ⁇ ° ( ⁇ ° clockwise) with respect to the first direction D1
  • the fourth direction D4 has a negative angle with respect to the first direction D1.
  • the angle is ⁇ ° ( ⁇ ° counterclockwise). That is, the third direction D3 and the fourth direction D4 are directions symmetric to each other with respect to the first direction D1.
  • the heat medium flows through the first portion 10a and flows at the end of the first portion 10a as schematically indicated by a white arrow in FIG. It collides with the solid part 11 and branches into a second part 10b and a third part 10c.
  • branching is repeated in any of the paths, there is no path through which the heat medium travels rapidly. Therefore, the heat medium flows relatively uniformly in the mold 1.
  • the branching is repeated in any of the paths, the heat medium is likely to be turbulent instead of laminar.
  • the heat medium flow path 10 has a two-dimensional honeycomb shape, the heat medium can flow uniformly and turbulently into the mold 1. Therefore, the temperature control of the mold 1 by the heat medium flow path 10 can be suitably performed. Also, unlike the case where a single flow path is extended long as in Patent Document 1, it is possible to prevent the heat medium from becoming difficult to flow due to pressure loss, and to prevent the temperature of the heat medium from rising or falling too much. Can be prevented.
  • the shape of the unit structure of the two-dimensional honeycomb is not limited to those exemplified here. That is, the shape of the solid portion 11 is not limited to the example illustrated here.
  • the solid portion 11 may be substantially polygonal, substantially circular, or substantially elliptical. 6 and 7 show other examples of the shape of the solid portion 11. In the example shown in FIG. 6, the solid portion 11 has a substantially circular shape. In the example shown in FIG. 7, the solid portion 11 has a substantially square shape.
  • the substantially polygonal solid portion 11 is not limited to the illustrated substantially hexagonal shape or substantially square shape, but may be a substantially triangular shape, a substantially octagonal shape, or the like. Irrespective of whether the solid portion 11 has a substantially polygonal shape, a substantially circular shape, or a substantially elliptical shape, an effect of flowing the heat medium uniformly and as a turbulent flow can be obtained.
  • the two solid part rows 11C adjacent to each other are such that the position of each solid part 11 in the second direction D2 is substantially half of the pitch P as shown in FIG. Preferably, they are arranged so as to be shifted.
  • the heat medium flow passage 10 has a first portion 10a extending substantially parallel to the first direction D1 and a symmetrical shape with respect to the first direction D1 from an end of the first portion 10a. It is preferable to include a second portion 10b and a third portion 10c extending substantially parallel to the third and fourth directions D3 and D4, respectively.
  • the heat medium flow path 10 includes the first portion 10a, the second portion 10b, and the third portion 10c. Since the probabilities of flowing into the second portion 10b and the third portion 10c are almost equal, it becomes easier to uniformly flow the heat medium into the mold 1.
  • the flow path diameter of the heat medium flow path 10 there is no particular limitation on the flow path diameter of the heat medium flow path 10. Also, there is no particular limitation on the number of solid part sequences 11C and the number of solid parts 11 included in each solid part sequence 11C.
  • the flow path diameter of the heat medium flow path 10, the number of the solid part rows 11C, the number of the solid parts 11 included in each solid part row 11C are determined by the shape of the thin portion 2, the size of the mold 1, the use, and the like. Is set as appropriate.
  • FIG. 8 shows an example of such a configuration.
  • FIG. 8 shows two sets provided in the mold 1.
  • One of the two sets is arranged in the mold 1 on one side (front side in the figure) in the Y direction, and the other is arranged on the other side (rear side in the figure) in the Y direction.
  • the number of sets of the heat medium flow path 10, the medium introduction port 4, and the medium discharge port 5 can be determined according to the size and use of the mold 1. In the example shown in FIG. 8, the number of the solid portions 11 included in each of the solid portion rows 11C of the heat medium flow path 10 is five, which is different from the examples shown in FIG.
  • FIGS. FIG. 9A to FIG. 12C sequentially show states about every 50 ms from the start of introduction of the heat medium into the medium introduction port 4.
  • FIG. 13 shows another example of the heat medium flow path 10.
  • the number of solid parts 11 included in each solid part sequence 11C is larger than in the examples shown in FIGS. More specifically, each solid part sequence 11C includes six or seven solid parts 11, a solid part sequence 11C including seven solid parts 11, and six solid parts 11C. 11 are alternately arranged.
  • the number of solid parts 11 included in each solid part sequence 11C is not particularly limited, and the number of solid parts 11 included in each solid part sequence 11C does not need to be the same.
  • FIG. 14 shows still another example of the heat medium flow path 10.
  • the connection position between the medium inlet 4 and the wide portion 6 is different from the example shown in FIG.
  • the medium inlet 4 is connected to the wide portion 6 at one end (specifically, the lower end) of the wide portion 6 in the second direction D2.
  • the medium introduction port 4 extends longer than the example illustrated in FIG. 3 and the like, and the end (specifically, the right end) of the wide portion 6 in the first direction D1. Section) is connected to the wide section 6. Verification has confirmed that the same effect can be obtained even when the medium inlet 4 is connected to the wide portion 6 in this manner.
  • FIG. 15 shows still another example of the heat medium flow path 10.
  • the wide portion 6 is omitted, and the heat medium flow path 10 (two-dimensional honeycomb-shaped portion) is directly connected to the medium inlet 4. Verification has confirmed that the same effect can be obtained even when the medium inlet 4 is connected to the heat medium flow path 10 in this manner.
  • the mold 1 is formed by using an additional manufacturing technique.
  • the additional manufacturing technology various methods using a 3D printer can be used.
  • a laser sintering method can be suitably used.
  • the manufacturing method according to the present embodiment includes a deposition step of depositing a metal powder in a layer with a predetermined thickness, and a laser irradiation in which the deposited metal powder is irradiated with a laser and sintered after the deposition step. And a step.
  • the mold 1 including the heat medium flow path 10 therein can be formed.
  • the metal powder various metal powders can be used, and for example, maraging steel or SKD61 equivalent steel can be suitably used.
  • the thickness of the metal powder deposited in one deposition step is, for example, 20 ⁇ m to 100 ⁇ m.
  • the unfired metal powder can be collected and reused.
  • the case where the laser sintering method is used is illustrated, but a laser melting method can also be used.
  • the laser melting method in the laser irradiation step, the metal powder is melted by laser irradiation.
  • the mold 1 since the heat medium flow path 10 has a two-dimensional honeycomb shape, the mold 1 has a smaller shape than the conventional structure (for example, the structure disclosed in Patent Document 1). It is easy to increase the ratio occupied by the heat medium flow path 10 in the mold 1. Therefore, the amount of raw materials required for manufacturing the mold 1 can be reduced, and the time required for manufacturing can be shortened.
  • the mold 1 (the mold in which the thin portion 2 is a portion corresponding to the water jacket of the cylinder block) 1 for forming at least a part of the cylinder block has been described. It is not limited to such a mold.
  • the embodiment of the present invention can be widely used for a mold having a thin portion, and for example, can also be suitably used for a mold for forming a water jacket of a water-cooled motor. Further, the embodiment of the present invention can be particularly suitably used when the thickness of the thin portion is about 10 mm or less.
  • the mold 1 is a mold 1 formed by an additional manufacturing technique, and is provided inside the mold and has a heat medium flow path 10 through which a heat medium flows, and a heat medium Has a medium introduction port 4 for introducing the heat medium into the mold, and a medium discharge port 5 for discharging the heat medium to the outside of the mold.
  • the heat medium flow path 10 has a two-dimensional honeycomb shape.
  • the heat medium flow path 10 has a two-dimensional honeycomb shape, so that the heat medium can flow uniformly and turbulently in the mold 1. Therefore, the temperature control of the mold 1 by the heat medium flow path 10 can be suitably performed.
  • the heat medium flow path 10 has a two-dimensional honeycomb shape, it is easy to increase the ratio of the heat medium flow path 10 in the mold 1. Therefore, the amount of raw materials required for manufacturing the mold 1 can be reduced, and the time required for manufacturing can be shortened.
  • the fact that the heat medium flow passage 10 has a two-dimensional honeycomb shape means that the inside of the mold 1 is almost uniformly hollowed out. Therefore, the residual stress generated at the time of manufacturing the mold 1 (at the time of molding) by the additional manufacturing technology can be reduced, so that there is an advantage that deformation such as warpage and generation of a crack can be suppressed.
  • the area in the mold where the heat medium flow path 10 is provided is divided into a plurality of solid portions 11 arranged in an array by the two-dimensional honeycomb-shaped heat medium flow path 10.
  • Each of the plurality of solid portions 11 has a substantially polygonal shape, a substantially circular shape, or a substantially elliptical shape.
  • a region in the mold where the heat medium flow path 10 is provided is divided by the two-dimensional honeycomb-shaped heat medium flow path 10 into a plurality of solid portions 11 arranged in an array.
  • each of the plurality of solid portions 11 may have a substantially polygonal shape, a substantially circular shape, or a substantially elliptical shape. Regardless of whether each of the solid portions 11 has a substantially polygonal shape, a substantially circular shape, or a substantially elliptical shape, an effect of flowing the heat medium uniformly and as a turbulent flow can be obtained.
  • the direction in which the heat medium flows as a whole in the heat medium flow path 10 from the medium inlet 4 toward the medium outlet 5 is defined as a first direction D1
  • a direction substantially orthogonal to the first direction D1 is defined as a direction.
  • the plurality of solid parts 11 are a plurality of solid part rows 11C each including two or more solid parts 11 arranged along the second direction D2, They are arranged so as to form a plurality of solid part rows 11C arranged in one direction D1.
  • the plurality of solid portions 11 are a plurality of solid portion rows 11C each including two or more solid portions 11 arranged along the second direction D2, and the plurality of solid portions 11 are arranged along the first direction D1. Can be arranged to form the solid part row 11C.
  • two or more solid parts 11 included in each of the plurality of solid part rows 11C are arranged at a predetermined pitch P along the second direction D2, and Two adjacent solid part rows 11C among the solid parts 11C are arranged such that the positions of the solid parts 11 in the second direction D2 are displaced substantially by half the pitch P.
  • each solid portion row 11C Two or more solid portions 11 included in each solid portion row 11C are arranged at a predetermined pitch P along the second direction D2. From the viewpoint of flowing the heat medium evenly, the two solid portion rows 11C adjacent to each other are arranged such that the positions of the solid portions 11 in the second direction D2 are shifted by approximately half the pitch P. Is preferred.
  • the heat medium flow path 10 includes a first portion 10a extending substantially parallel to the first direction D1, and a third direction D3 symmetrical with respect to the first direction D1 from an end of the first portion 10a. It includes a second portion 10b and a third portion 10c extending substantially parallel to the fourth direction D4.
  • the heat medium flow path 10 includes a first portion 10a extending substantially parallel to the first direction D1, and a third direction D3 and a fourth direction D4 symmetrical with respect to the first direction D1 from an end of the first portion 10a. It is preferable to include a second portion 10b and a third portion 10c each extending substantially in parallel.
  • the heat medium flow path 10 includes the first portion 10a, the second portion 10b, and the third portion 10c. Since the probabilities of flowing into the second portion 10b and the third portion 10c are almost equal, it becomes easier to uniformly flow the heat medium into the mold 1.
  • each of the plurality of solid portions 11 is substantially hexagonal.
  • Each of the plurality of solid portions 11 has, for example, a substantially hexagonal shape, and more specifically, has, for example, a substantially regular hexagonal shape.
  • the mold 1 includes the thin portion 2 having a thickness smaller than at least a part of other portions, and the heat medium flow path 10 includes a portion located in the thin portion 2.
  • the embodiment of the present invention is suitably used for the mold 1 including the thin portion 2.
  • the heat medium flow passage 10 is arranged so as to include a portion located in the thin portion 2.
  • the mold 1 is a mold for forming at least a part of a cylinder block
  • the thin portion 2 is a portion corresponding to a water jacket of the cylinder block.
  • the embodiment of the present invention is suitably used for the mold 1 for forming at least a part of the cylinder block.
  • the thin portion 2 may be a portion corresponding to a water jacket of a cylinder block.
  • the embodiment of the present invention it is possible to suitably perform the temperature control by the heat medium flow path in the mold formed by the additional manufacturing technology.
  • the embodiment of the present invention can be suitably used for a mold having a thin portion, for example.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

Selon un mode de réalisation, la présente invention concerne une matrice métallique (1) qui est formée par fabrication additive. La matrice métallique possède un canal de milieu thermique (10) qui est disposé au sein de la matrice métallique et à travers lequel s'écoule un milieu thermique, un orifice d'admission de milieu (4) à travers lequel le milieu thermique est introduit dans la matrice métallique, et un orifice d'évacuation de milieu (5) à travers lequel le milieu thermique est évacué vers l'extérieur de la matrice métallique. Le canal de milieu thermique possède une forme en nid d'abeilles tridimensionnelle.
PCT/JP2018/026385 2018-07-12 2018-07-12 Matrice métallique WO2020012614A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/026385 WO2020012614A1 (fr) 2018-07-12 2018-07-12 Matrice métallique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/026385 WO2020012614A1 (fr) 2018-07-12 2018-07-12 Matrice métallique

Publications (1)

Publication Number Publication Date
WO2020012614A1 true WO2020012614A1 (fr) 2020-01-16

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WO (1) WO2020012614A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6145804A (en) * 1997-02-07 2000-11-14 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Defined fine-membered and point-focal temperable molds and tools
EP1777479A2 (fr) * 2005-10-18 2007-04-25 Werkzeugbau Siegfried Hofmann GmbH Appareil pour régler la temperature d'un corps métallique ainsi qu'utilisation du même
JP2013035053A (ja) * 2011-08-10 2013-02-21 Honda Motor Co Ltd ウォータジャケット成形用金型

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6145804A (en) * 1997-02-07 2000-11-14 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Defined fine-membered and point-focal temperable molds and tools
EP1777479A2 (fr) * 2005-10-18 2007-04-25 Werkzeugbau Siegfried Hofmann GmbH Appareil pour régler la temperature d'un corps métallique ainsi qu'utilisation du même
JP2013035053A (ja) * 2011-08-10 2013-02-21 Honda Motor Co Ltd ウォータジャケット成形用金型

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