WO2023083063A1 - 一种镶嵌式的热模锻活塞模具 - Google Patents

一种镶嵌式的热模锻活塞模具 Download PDF

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WO2023083063A1
WO2023083063A1 PCT/CN2022/129145 CN2022129145W WO2023083063A1 WO 2023083063 A1 WO2023083063 A1 WO 2023083063A1 CN 2022129145 W CN2022129145 W CN 2022129145W WO 2023083063 A1 WO2023083063 A1 WO 2023083063A1
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core
inner ring
die
base
outer ring
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PCT/CN2022/129145
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English (en)
French (fr)
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骆春阳
梅吟飞
李理
方振江
张益�
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浙江跃进机械有限公司
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Publication of WO2023083063A1 publication Critical patent/WO2023083063A1/zh

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00Details of machines for forging, pressing, or hammering
    • B21J13/02Dies or mountings therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00Making machine elements
    • B21K1/18Making machine elements pistons or plungers

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  • the invention relates to the technical field of die forging, in particular to an inlaid hot die forging piston die.
  • the technical problem to be solved by the present invention is to provide an inlaid hot forging piston die with good formability and long service life.
  • the present invention provides a mosaic-type hot forging piston die, including an upper die and a lower die;
  • the upper mold and the lower mold are connected with each other to form an inner cavity, and the inner cavity includes three parts: a skirt, a core and a combustion chamber;
  • the lower mold includes a core, an inner ring, an outer ring and a base, the four are embedded together, the inner ring and the base are nested in the outer ring from top to bottom, the core is nested in the inner ring, and the base is located in the inner ring and directly below the core;
  • the contact surfaces among the core, the inner ring, the outer ring and the base adopt an interference fit
  • a flash groove is also arranged between the upper mold and the lower mold, and the flash groove communicates with the combustion chamber;
  • the core, inner ring, outer ring and base are made of different materials.
  • a flash groove is also provided between the upper mold and the lower mold, and the flash groove is matched and communicated with the combustion chamber; the design of the flash groove makes the overflowing material reduce the stress on the mold and increase the life of the mold.
  • the corners of the upper mold and the lower mold are smoothed and rounded.
  • Both the core and the combustion chamber are provided with draft angles.
  • the levels of the top of the outer ring, the top of the inner ring and the top of the core are successively lowered to form a ladder;
  • the outer diameter of the bottom of the lower die is the same as the inner diameter of the outer ring, and the bottom of the lower die extends into the outer ring;
  • the bottom of the upper mold, the top of the core, the top of the inner ring and the inner side wall enclose to form an inner cavity.
  • the outer wall of the upper mold is also provided with a clamping platform, and the outer diameter of the clamping platform is larger than the inner diameter of the outer ring.
  • Both the base and the inner ring are provided with cooperating pin holes, and the pins are fixed through the pin holes of the base and the inner ring.
  • the core is a DH21 core
  • the inner ring is an H13 inner ring
  • the outer ring is a 42CrMo outer ring
  • the base is an H13 base.
  • the outer wall of the upper mold is also provided with a clamping platform, and the outer diameter of the clamping platform is larger than the inner diameter of the outer ring.
  • the split method of the present invention can select different materials according to the force conditions of different parts, which can effectively reduce the stress of parts that are easy to crack, increase the life of the die, and facilitate the manufacture of the die; the contact surface adopts interference fit, which can avoid drilling at the split position. glitch.
  • the joint surface needs to be provided with a certain length of straight section, which can play the role of anti-rotation.
  • Matching flash grooves are also provided between the upper and lower molds of the mould. The design of the flash groove allows the overflowing material to reduce the force on the mold and increase the life of the mold.
  • Fig. 1 is the structural representation of a kind of embedded hot forging piston mold of the present invention
  • Fig. 2 is a schematic diagram of the internal structure of a mosaic hot forging piston die of the present invention
  • FIG. 3 is a schematic structural view of the lower mold 2 in FIG. 1 .
  • Embodiment 1 An embedded hot forging piston die, as shown in Fig. 1-3, includes two parts, an upper die 1 and a lower die 2.
  • the lower mold 2 includes four parts: the core 21, the inner ring 23, the outer ring 24 and the base 22. The four parts are embedded together.
  • the inner ring 23 and the base 22 are nested in the outer ring 24 from top to bottom, and the core 21 is nested Inside the inner ring 23 , the base 22 is located directly below the inner ring 23 and the core 21 .
  • This split method can select different materials according to the stress of different parts, which can effectively reduce the stress of the part of the mold that is prone to cracking, and is also convenient for mold production; the contact surfaces between the core 21, the inner ring 23, the outer ring 24 and the base 22 Interference fit, which can avoid drilling burrs at the split position; a certain length of straight section needs to be set on the joint surface, which can play the role of anti-rotation, that is, pin holes are opened on the base 22 and the inner ring 23, The pin holes of the base 22 and the inner ring 23 are aligned as a straight section, one end of the pin 8 passes through the pin holes of the base 22 and the inner ring 23, and the other end of the pin 8 is inserted into the backing plate, thereby fixing the inner ring 23 to prevent the inner ring 23 from Rotate, the backing plate is fixed on the mold base.
  • the upper mold 1 and the lower mold 2 are mated and connected to form an inner cavity, which includes three parts: the skirt 3, the core 4 and the combustion chamber 5; the levels of the top of the outer ring 24, the top of the inner ring 23 and the top of the core 21 are successively reduced , forming a ladder form.
  • the outer diameter of the bottom of the lower die 2 is the same as the inner diameter of the outer ring 24. When in use, the bottom of the lower die 2 extends into the outer ring 24.
  • the inner cavity is specifically composed of the bottom of the upper die 1, the top of the core 21, and the inner ring 23. The top and the inner wall are enclosed and formed.
  • Upper mold 1 outer side wall is also provided with card platform 7, and the outer diameter of card platform 7 is greater than the inner diameter of outer ring 24, and card platform 7 is used for preventing the length that the bottom of upper mold 1 stretches into outer ring 24 is too long.
  • a flash groove 6 is also provided between the upper die 1 and the lower die 2 (inner ring 23 of the lower die 2 ), and the flash groove 6 is matched and communicated with the combustion chamber 5 .
  • the design of the flash groove 6 enables the overflowing material to reduce the stress on the mold and thus increase the life of the mold.
  • the corners of the upper mold 1 and the lower mold 2 are smoothed and rounded. Increase the sharp R angle to increase the flow of the casting and make the product easier to form.
  • Both the core 4 and the combustion chamber 5 are designed with a draft angle; the draft angle is conducive to demolding the product, reducing friction with the mold during demoulding, and improving the service life of the mold.
  • the core 21 adopts DH21, and DH21 has a very good effect on thermal fatigue crack resistance, which can improve the service life of the core 21;
  • the inner ring 23 adopts H13, which has high hardenability and high toughness;
  • the outer ring 24 is made of 42CrMo, which has high strength and toughness;
  • the base 22 adopts H13, which has high hardenability and high toughness
  • Different materials are selected according to the force of different parts, which can effectively reduce the stress of the part of the mold that is prone to cracking, increase the life of the mold, and facilitate mold production;

Abstract

一种镶嵌式的热模锻活塞模具,包括上模(1)和下模(2),上模和下模相互配合连接形成内腔,内腔包括裙部(3)、芯部(4)和燃烧室(5)三部分,下模包括芯子(21)、内圈(23)、外圈(24)和底座(22),四者相互镶嵌在一起,内圈和底座从上到下嵌套在外圈内,芯子嵌套在内圈内,底座位于内圈和芯子正下方,芯子、内圈、外圈和底座之间的接触面采用过盈配合,芯子、内圈、外圈和底座之间的结合面设置一定长度的直段,上模和下模之间还设置有飞边槽,飞边槽与燃烧室连通。这种分体方式可以根据不同部位受力情况选择不同材料,能有效降低模具易开裂部分应力,增加模具寿命,也便于模具制作。

Description

一种镶嵌式的热模锻活塞模具 技术领域
本发明涉及模具锻造技术领域,具体的说是一种镶嵌式的热模锻活塞模具。
背景技术
随着汽车发动机的快速发展,市场化竞争日益激烈,如果不提高效率和产能,便会在活塞市场攻占过程中失去先机。而由于连续生产后,模具便慢慢失效,容易开裂,需频繁更换模具,成本居高不下,产能也无法提高,因此模具寿命的提高势在必行。
发明内容
本发明要解决的技术问题是提供一种成形性能好、使用寿命长的一种镶嵌式的热模锻活塞模具。
为解决上述技术问题,本发明提供一种镶嵌式的热模锻活塞模具,包括上模和下模;
所述上模和下模相互配合连接形成内腔,内腔包括裙部、芯部和燃烧室三部分;
所述下模包括芯子、内圈、外圈和底座,四者相互镶嵌在一起,内圈和底座从上到下嵌套在外圈内,芯子嵌套在内圈内,底座位于内圈和芯子正下方;
所述芯子、内圈、外圈和底座之间的接触面采用过盈配合;
所述上模和下模之间还设置有飞边槽,飞边槽与燃烧室连通;
所述芯子、内圈、外圈和底座采用不同材料。
作为对本发明一种镶嵌式的热模锻活塞模具的改进:
所述上模和下模之间还设置有飞边槽,飞边槽与燃烧室匹配连通;飞边槽的设计,使得外溢的材料能减轻模具受力进而增加模具寿命。
作为对本发明一种镶嵌式的热模锻活塞模具的改进:
所述上模和下模的拐角处光顺圆润处理。
作为对本发明一种镶嵌式的热模锻活塞模具的改进:
所述芯部和燃烧室均设有拔模角。
作为对本发明一种镶嵌式的热模锻活塞模具的改进:
所述外圈顶部、内圈顶部和芯子顶部的水平高度依次降低,形成阶梯的形式;
所述下模底部的外直径与外圈的内直径相同,下模底部伸入到外圈内;
所述上模底部、芯子顶部和内圈顶部及内侧壁围合形成内腔。
作为对本发明一种镶嵌式的热模锻活塞模具的改进:
所述上模外侧壁还设置有卡台,卡台的外直径大于外圈的内直径。
作为对本发明一种镶嵌式的热模锻活塞模具的改进:
所述底座和内圈上均开设有配合使用的销子孔,销子穿过底座和内圈的销子孔进行固定。
作为对本发明一种镶嵌式的热模锻活塞模具的改进:
所述芯子为DH21芯子;
所述内圈为H13内圈;
所述外圈为42CrMo外圈;
所述底座为H13底座。
作为对本发明一种镶嵌式的热模锻活塞模具的改进:
所述上模外侧壁还设置有卡台,卡台的外直径大于外圈的内直径。
本发明一种镶嵌式的热模锻活塞模具的技术优势为:
本发明这种分体方式可以根据不同部位受力情况选择不同材料,能有效降低模具易开裂部分应力,增加模具寿命,也便于模具制作;接触面采用过盈配合,这样可以避免分体位置钻毛刺。结合面需要设置一定长度的直段,这样可以起到防转的作用。模具的上、下模具之间分别还设有匹配的飞边槽。飞边槽的设计,使得外溢的材料能减轻模具受力进而增加模具寿命。
附图说明
下面结合附图对本发明的具体实施方式作进一步详细说明。
图1是本发明一种镶嵌式的热模锻活塞模具的结构示意图;
图2是本发明一种镶嵌式的热模锻活塞模具的内部结构示意图;
图3是图1中下模2的结构示意图。
具体实施方式
下面结合具体实施例对本发明进行进一步描述,但本发明的保护范围并不仅限于此。
实施例1、一种镶嵌式的热模锻活塞模具,如图1-3所示,包括上模1和下模2两部分。
下模2包括芯子21、内圈23、外圈24和底座22四部分,四者相互镶嵌在一起,内圈23和底座22从上到下嵌套在外圈24内,芯子21嵌套在内圈23内,底座22位于内圈23和芯子21正下方。这种分体方式可以根据不同部位受力情况选择不同材料,能有效降低模具易开裂部分应力,也便于模具制作;芯子21、内圈23、外圈24和底座22之间的接触面采用过盈配合,这样可以避免分体位置钻毛刺;在结合面需要设置一定长度的直段,这样可以起到 防转的作用,即为在底座22和内圈23上均开设有销子孔,底座22和内圈23的销子孔对齐作为直段,销子8一端穿过底座22和内圈23的销子孔,销子8另一端插入垫板,从而固定内圈23防止内圈23转动,垫板在模座上是固定不动的。
上模1和下模2相互配合连接形成内腔,内腔包括裙部3、芯部4和燃烧室5三部分;外圈24顶部、内圈23顶部和芯子21顶部的水平高度依次降低,形成阶梯的形式。下模2底部的外直径与外圈24的内直径相同,在使用时,下模2底部伸入到外圈24内,内腔具体是由上模1底部、芯子21顶部、内圈23顶部及内侧壁围合形成。
上模1外侧壁还设置有卡台7,卡台7的外直径大于外圈24的内直径,卡台7用于防止上模1底部伸入到外圈24内的长度过长。
上模1和下模2(下模2的内圈23)之间还设置有飞边槽6,飞边槽6与燃烧室5匹配连通。飞边槽6的设计,使得外溢的材料能减轻模具受力进而增加模具寿命。
上模1和下模2的拐角处光顺圆润处理。将锐利的R角增大以增加铸件的流动,使产品更易成形。
芯部4和燃烧室5均设计有拔模角;拔模角度利于与产品脱模,减少脱模时与模具的摩擦,提高模具的使用寿命。
芯子21采用DH21,DH21在抗热疲劳开裂性方面具有相当好的效果,可以提高芯子21的使用寿命;
内圈23采用H13,具有高的淬透性和高的韧性;
外圈24采用42CrMo,具有高强度和韧性;
底座22采用H13,具有高的淬透性和高的韧性;
根据不同部位受力情况选择不同材料,,能有效降低模具易开裂部分应力,增加模具寿命,也便于模具制作;
在本发明的描述中,需要说明的是,如出现术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等,其所指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。此外,如出现术语“第一”、“第二”、“第三”仅用于描述目的,而不能理解为指示或暗示相对重要性。
在本发明的描述中,需要说明的是,除非另有明确的规定和限定,如出现术语“安装”、“相连”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体 地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以具体情况理解上述术语在本发明中的具体含义。
在不改变本发明的创造内容下进行简单的置换均视为相同的创造。说明书中各个实施例采用递进的方式描述,每个实施例重点说明的都是与其他实施例的不同之处,各个实施例之间相同相似部分互相参见即可。对所公开的实施例的上述说明,使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的,本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下,在其它实施例中实现。因此,本发明将不会被限制于本文所示的这些实施例,而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (8)

  1. 一种镶嵌式的热模锻活塞模具,其特征在于:包括上模(1)和下模(2);
    所述上模(1)和下模(2)相互配合连接形成内腔,内腔包括裙部(3)、芯部(4)和燃烧室(5)三部分;
    所述下模(2)包括芯子(21)、内圈(23)、外圈(24)和底座(22),四者相互镶嵌在一起,内圈(23)和底座(22)从上到下嵌套在外圈(24)内,芯子(21)嵌套在内圈(23)内,底座(22)位于内圈(23)和芯子(21)正下方;
    所述芯子(21)、内圈(23)、外圈(24)和底座(22)之间的接触面采用过盈配合;
    所述上模(1)和下模(2)之间还设置有飞边槽(6),飞边槽(6)与燃烧室(5)连通;
    所述芯子(21)、内圈(23)、外圈(24)和底座(22)采用不同材料。
  2. 根据权利要求1所述一种镶嵌式的热模锻活塞模具,其特征在于:
    所述上模(1)和下模(2)之间还设置有飞边槽(6),飞边槽(6)与燃烧室(5)匹配连通;飞边槽(6)的设计,使得外溢的材料能减轻模具受力进而增加模具寿命。
  3. 根据权利要求2所述一种镶嵌式的热模锻活塞模具,其特征在于:
    所述上模(1)和下模(2)的拐角处光顺圆润处理。
  4. 根据权利要求3所述一种镶嵌式的热模锻活塞模具,其特征在于:
    所述芯部(4)和燃烧室(5)均设有拔模角。
  5. 根据权利要求4所述一种镶嵌式的热模锻活塞模具,其特征在于:
    所述外圈(24)顶部、内圈(23)顶部和芯子(21)顶部的水平高度依次降低,形成阶梯的形式;
    所述下模(2)底部的外直径与外圈(24)的内直径相同,下模(2)底部伸入到外圈(24)内;
    所述上模(1)底部、芯子(21)顶部和内圈(23)顶部及内侧壁围合形成内腔。
  6. 根据权利要求5所述一种镶嵌式的热模锻活塞模具,其特征在于:
    所述上模(1)外侧壁还设置有卡台(7),卡台(7)的外直径大于外圈(24)的内直径。
  7. 根据权利要求6所述一种镶嵌式的热模锻活塞模具,其特征在于:
    所述底座(22)和内圈(23)上均开设有配合使用的销子孔,销子(8)穿过底座(22)和内圈(23)的销子孔进行固定。
  8. 根据权利要求7所述一种镶嵌式的热模锻活塞模具,其特征在于:
    所述芯子(21)为DH21芯子;
    所述内圈(23)为H13内圈;
    所述外圈(24)为42CrMo外圈;
    所述底座(22)为H13底座。
PCT/CN2022/129145 2021-11-10 2022-11-02 一种镶嵌式的热模锻活塞模具 WO2023083063A1 (zh)

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