WO2014082388A1 - Heterogeneous valve body core frame - Google Patents
Heterogeneous valve body core frame Download PDFInfo
- Publication number
- WO2014082388A1 WO2014082388A1 PCT/CN2013/071242 CN2013071242W WO2014082388A1 WO 2014082388 A1 WO2014082388 A1 WO 2014082388A1 CN 2013071242 W CN2013071242 W CN 2013071242W WO 2014082388 A1 WO2014082388 A1 WO 2014082388A1
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- WIPO (PCT)
- Prior art keywords
- holes
- core
- wall
- hole
- core bone
- Prior art date
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- 210000000988 bone and bone Anatomy 0.000 claims description 58
- 238000003754 machining Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 4
- 238000012797 qualification Methods 0.000 abstract description 3
- 238000005266 casting Methods 0.000 description 11
- 239000004576 sand Substances 0.000 description 7
- 230000035699 permeability Effects 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
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- 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
Definitions
- the present invention relates to a valve body core core, and more particularly to a heterogeneous valve body core core. Background technique
- the existing valve body core core mostly adopts a hollow tubular structure
- FIG. 2 another existing embodiment, such as the Chinese utility model patent CN 201728336U, discloses one.
- the large-scale excavator super high-precision multi-channel control main valve body sand type wherein the core is embedded with a hollow core bone, and the surface of the hollow core bone is a honeycomb shape uniformly distributed with small holes, which can improve the gas permeability.
- These valve body cores are all simple homogeneous cores. The basic purpose is to enhance the strength of the core. For the valve body with simple structure and shape, it can basically ensure that the core has good gas permeability when it meets the strength requirements.
- This kind of simple homogeneous core bone only considers the core strength and air permeability performance from the perspective of experience, but does not specifically analyze the core structure, neglects the factors such as uneven deformation after stress, and does not comprehensively analyze the sand shooting situation. .
- a non-homogeneous valve body core core is provided, so that the core can meet the requirements of strength and rigidity, and the stress of each section is uniform, so that the strain is uniform.
- the technical solution adopted by the present invention to solve the technical problem is as follows:
- the hollow core die has a hole having a size and uneven arrangement on the wall of the core bone, and the hole having the size and uneven arrangement includes: At least one partial area on the wall of the core bone has more than one large hole, and at least one other partial area on the wall of the core bone has more than one small hole; the area of the large hole is larger than small The area of the hole, the force of the section where the large hole is opened in the local area is smaller than the capacity of the section where the small hole is opened in the other part.
- the at least one partial region of the wall of the core bone has more than one large hole.
- the front end of the wall of the core bone is opened with two large holes 1 arranged horizontally, and the core bone is Three rows of large holes 2 are arranged at intervals from the middle to the rear of the wall, and each row of large holes includes two large holes 2 arranged vertically, and the area of the large holes 1 is larger than the area of the large holes 2, the large holes.
- the force capacity of a section is smaller than that of the section at the small hole, and the force of the section at the two holes is smaller than that of the section of the large hole.
- the large holes and the small holes are all circular holes.
- At least one partial area on the wall of the core bone has more than one large hole.
- the front end of the wall body of the core bone is provided with two large holes arranged vertically, and the wall of the core bone Two large holes arranged horizontally at the center to the rear end;
- At least one other small area on the wall of the core bone has more than one small hole, specifically: two large holes are arranged with two small holes arranged horizontally in the interval, and the rear one hole and the core bone Two small holes arranged horizontally are arranged in the space between the bottom ends of the wall bodies. Further, the large holes and the small holes are square holes. Further, a part of the wall of the core bone has a plurality of large holes with a gradual change in area, and another part of the wall of the core body has a plurality of small holes with a gradually grading area, and a section at the large hole The ability to withstand is smaller than the ability of the section at the small hole.
- the beneficial effects of the present invention are:
- the present invention changes the original strength-based method from the viewpoint of stress and strain.
- the heterogeneous valve body core core of the invention enables the core to meet the strength and rigidity requirements while making the strain uniform, and can effectively reduce the obstacles during sand shooting.
- the precision of the valve body casting with high shape and high precision is greatly improved, the deformation of the casting is uniform and controllable, the machining allowance is reduced, the difficulty of subsequent machining is reduced, and a higher product qualification rate is obtained.
- FIG. 1 is a schematic structural view of an embodiment of the prior art
- FIG. 2 is a schematic structural view of another embodiment of the prior art
- FIG. 3 is a schematic exploded view of a core bone according to Embodiment 1 of the present invention.
- FIG. 4 is a schematic exploded view of a core bone according to a second embodiment of the present invention.
- Figure 5 is a schematic exploded view of a core bone according to a third embodiment of the present invention.
- a non-homogeneous valve body core core having a hollow core, a wall having a size and uneven arrangement on the wall of the core bone, and a hole having a size and uneven arrangement includes: a wall of the core bone How many local areas are open a large hole 1, a plurality of other partial regions on the wall of the core bone are provided with a plurality of small holes 2; the area of the large holes 1 is larger than the area 2 of the small holes, and the cross-sectional force at the large area 1 is opened in the local area Less than the other partial area, the cross-sectional force at the small hole 2 is opened.
- DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 1 As shown in FIG.
- a non-homogeneous valve body core core has a hollow core, and the wall of the core is provided with holes of uneven size and arrangement.
- the holes having uneven size and arrangement include: a plurality of partial regions on the wall of the core bone are provided with a plurality of large holes 1 , and a plurality of other partial regions on the wall of the core bone are provided with a plurality of small holes 2 .
- the plurality of partial regions on the wall of the core bone are provided with a plurality of large holes 1 in particular: the front end of the wall of the core bone is provided with two large holes 11 arranged horizontally, and the central portion of the core body is open to the rear end Three rows of large holes 2 are arranged at intervals, each row of large holes includes two large holes 2 vertically arranged, the area of the large holes 11 is larger than the area of the large holes 12, and the cross-section capacity of the large holes 11 It is smaller than the section's ability to bear at the small hole.
- the section of the large hole at 12 is less than the capacity of the large hole and 11 section.
- the large hole 11 , the large hole 2 12 , and the small hole 2 are all circular holes.
- a non-homogeneous valve body core core has a hollow core bone, and the wall of the core bone is provided with holes of different sizes and arrangement.
- the holes having uneven size and arrangement include: a plurality of partial regions on the wall of the core bone are provided with a plurality of large holes 1 , and a plurality of other partial regions on the wall of the core bone are provided with a plurality of small holes 2 .
- the plurality of partial regions on the wall of the core bone are provided with a plurality of large holes 1 in particular: the front end of the wall of the core bone is provided with two large holes 1 arranged vertically, and the center of the core body is opened horizontally to the rear end. Two large holes 1 arranged at intervals.
- a plurality of small holes 2 are formed in a plurality of other partial regions on the wall of the core bone. Specifically, the two large holes 1 are separated by two small holes 2 arranged horizontally, and the rear large holes 1 and the core bone Two small holes 2 are arranged horizontally spaced apart in the space between the bottom ends of the walls.
- Both the large hole 1 and the small hole 2 are square holes.
- the valve body core of the heterogeneous valve body core core is used for shot blasting, no core is found to be unreal; after filling and cooling, the casting is qualified, and the flow passage of the valve body casting is more uniform.
- DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 3 As shown in FIG. 5, a non-homogeneous valve body core core has a hollow core, and a wall having a size and uneven arrangement is formed on the wall of the core.
- the holes having uneven size and arrangement include: a plurality of partial regions on the wall of the core bone are provided with a plurality of large holes 1, and a plurality of other partial regions on the wall of the core bone are provided with a plurality of small holes 2.
- a plurality of large holes are formed in a plurality of partial regions on the wall of the core bone. Specifically, the partial area on the wall of the core bone is opened with a plurality of large holes having a gradient of a plurality of rows.
- a plurality of small holes 2 are formed in a plurality of other partial regions on the wall of the core bone. Specifically, another partial area on the wall of the core bone is provided with a plurality of small holes 2 having a gradual change in area, and the cross section at the large hole 1 is affected by The force capacity is smaller than the section force capability at the small hole 2.
- the present invention changes the original method based on strength considerations from the viewpoint of stress and strain.
- the heterogeneous valve body core core of the invention focuses on analyzing the characteristic parts on the core, and based on the idea of weakening the strength and slightly increasing the strength, adjusting the strength according to the force of each section of the core, so that the core can While meeting the strength and rigidity requirements, the strain is uniform and the obstacles during sand shooting can be effectively reduced. Therefore, the precision of the valve body casting with high shape and high precision is greatly improved, and the deformation of the casting is uniform and controllable, the machining allowance is reduced, the difficulty of subsequent machining is reduced, and a higher product qualification rate is obtained.
Abstract
A heterogeneous valve body core frame, having a hollow tube core frame; holes of different sizes are non-uniformly arranged in the wall of the core frame; the holes comprise: more than one big hole (1) formed in at least one local area in the wall of the core frame, and more than one small hole (2) formed in at least another local area on the wall of the core frame; the area of a big hole (1) is greater than that of a small hole (2); the sectional load-bearing capability in the local area where the big holes (1) are formed is smaller than that in another local area where the small holes (2) are formed. The heterogeneous valve body core frame ensures that the core has uniform stress on each section while satisfying strength and rigidity requirements so as to have uniform strain, and can effectively reduce the obstruction in a shooting process, thus reducing the machining allowance and subsequent machining difficulty, and achieving higher product qualification.
Description
非均质阀体型芯芯骨 技术领域 本发明涉及一种阀体型芯芯骨， 尤其是一种非均质阀体型芯芯骨。 背景技术 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve body core core, and more particularly to a heterogeneous valve body core core. Background technique
如图 1所示， 现有的一实施方式， 现有阀体型芯芯骨大多采用空心管 状结构， 如图 2 所示， 现有的另一实施方式， 如中国实用新型专利 CN 201728336U公开了一种大型挖掘机超高精密多路控制主阀阀体砂型， 其中型芯内埋有空心芯骨，所述空心芯骨的表面为均匀分布小孔的蜂窝 状， 可以提高透气性。 这些阀体型芯芯骨都属于简易均质类芯骨， 基本目 的是增强型芯强度， 对于结构简单和形状一般的阀体型芯， 基本能保证型 芯在满足强度要求时具有良好的透气性能。 As shown in FIG. 1 , in the prior embodiment, the existing valve body core core mostly adopts a hollow tubular structure, as shown in FIG. 2 , another existing embodiment, such as the Chinese utility model patent CN 201728336U, discloses one. The large-scale excavator super high-precision multi-channel control main valve body sand type, wherein the core is embedded with a hollow core bone, and the surface of the hollow core bone is a honeycomb shape uniformly distributed with small holes, which can improve the gas permeability. These valve body cores are all simple homogeneous cores. The basic purpose is to enhance the strength of the core. For the valve body with simple structure and shape, it can basically ensure that the core has good gas permeability when it meets the strength requirements.
然而， 对于形状复杂精度要求较高的阀体， 这类均质芯骨虽然提高了 型芯强度， 但这种补强是均匀的， 而型芯上所受应力依然是不均的， 产生 的应变当然也是不同的， 最终导致铸件变形不均， 误差不可控， 影响铸件 质量， 并造成后期加工余量增大或加工困难。 通常这类芯骨还会对射砂产 生一定的阻碍作用， 会因射砂不足而造成射砂不实现象， 影响砂型质量， 最终导致阀体铸件缺陷。 However, for a valve body with a high shape and high precision, such a homogeneous core has improved core strength, but the reinforcement is uniform, and the stress on the core is still uneven. The strain is of course different, which ultimately leads to uneven deformation of the casting, uncontrollable error, affecting the quality of the casting, and causing an increase in machining allowance or processing difficulties. Usually, such core bones will also have a certain hindrance to sand shooting, which will result in the lack of sand shooting, which will affect the sand quality and eventually lead to valve body casting defects.
这类简易均质芯骨仅从经验的角度考虑了型芯强度及透气性能等因 素， 而没有具体分析型芯结构， 忽略了受力后变形不均等因素， 对射砂情 况也没有进行全面分析。 This kind of simple homogeneous core bone only considers the core strength and air permeability performance from the perspective of experience, but does not specifically analyze the core structure, neglects the factors such as uneven deformation after stress, and does not comprehensively analyze the sand shooting situation. .
发明内容
本发明要解决的技术问题是： 克服现有技术的不足， 提供一种非均质阀 体型芯芯骨，使得型芯能在满足强度和刚性要求的同时，各截面应力均匀， 使得应变均匀。 Summary of the invention The technical problem to be solved by the present invention is: To overcome the deficiencies of the prior art, a non-homogeneous valve body core core is provided, so that the core can meet the requirements of strength and rigidity, and the stress of each section is uniform, so that the strain is uniform.
本发明解决其技术问题所采用的技术方案是： 具有空心管芯骨， 所述芯骨的 壁体上开有大小及排布不均匀的孔， 所述大小及排布不均匀的孔包括： 所述芯 骨的壁体上至少一个局部区域开有一个以上的大孔， 所述芯骨的壁体上至少一 个另一局部区域开有一个以上的小孔； 所述大孔的面积大于小孔的面积， 局部 区域开有大孔处的截面受力能力小于另一局部区域开有小孔处的截面受力能 力。 The technical solution adopted by the present invention to solve the technical problem is as follows: The hollow core die has a hole having a size and uneven arrangement on the wall of the core bone, and the hole having the size and uneven arrangement includes: At least one partial area on the wall of the core bone has more than one large hole, and at least one other partial area on the wall of the core bone has more than one small hole; the area of the large hole is larger than small The area of the hole, the force of the section where the large hole is opened in the local area is smaller than the capacity of the section where the small hole is opened in the other part.
进一步地， 所述芯骨的壁体上至少一个局部区域开有一个以上的大孔具体 为： 所述芯骨的壁体前端开有水平间隔排列的两个大孔一， 所述芯骨的壁体中 部至后端开设有间隔排列的三排大孔二， 每排大孔包括竖直排列的两个大孔二， 所述大孔一的面积大于大孔二的面积， 所述大孔一处的截面受力能力小于小孔 处的截面受力能力， 所述大孔二处的截面受力能力小于大孔一处的截面受力能 力。 Further, the at least one partial region of the wall of the core bone has more than one large hole. The front end of the wall of the core bone is opened with two large holes 1 arranged horizontally, and the core bone is Three rows of large holes 2 are arranged at intervals from the middle to the rear of the wall, and each row of large holes includes two large holes 2 arranged vertically, and the area of the large holes 1 is larger than the area of the large holes 2, the large holes The force capacity of a section is smaller than that of the section at the small hole, and the force of the section at the two holes is smaller than that of the section of the large hole.
进一步地， 所述大孔和小孔均为圆形孔。 Further, the large holes and the small holes are all circular holes.
进一步地， 所述芯骨的壁体上至少一个局部区域开有一个以上的大孔具体 为： 所述芯骨的壁体前端开有竖直排列的两个大孔， 所述芯骨的壁体中部至后 端开设有水平间隔排列的两个大孔； Further, at least one partial area on the wall of the core bone has more than one large hole. Specifically, the front end of the wall body of the core bone is provided with two large holes arranged vertically, and the wall of the core bone Two large holes arranged horizontally at the center to the rear end;
所述芯骨的壁体上至少一个另一局部区域开有一个以上的小孔具体为： 两 个大孔的间隔中开有水平间隔排列的两个小孔， 后一大孔与芯骨的壁体底端之 间的间隔内开有水平间隔排列的两个小孔。
进一步地， 所述大孔和小孔均为方形孔。 进一步地， 所述芯骨的壁体上局部区域开有多排面积渐变的大孔， 所述芯 骨的壁体上另一局部区域开有多排面积渐变的小孔， 大孔处的截面受力能力小 于小孔处的截面受力能力。 At least one other small area on the wall of the core bone has more than one small hole, specifically: two large holes are arranged with two small holes arranged horizontally in the interval, and the rear one hole and the core bone Two small holes arranged horizontally are arranged in the space between the bottom ends of the wall bodies. Further, the large holes and the small holes are square holes. Further, a part of the wall of the core bone has a plurality of large holes with a gradual change in area, and another part of the wall of the core body has a plurality of small holes with a gradually grading area, and a section at the large hole The ability to withstand is smaller than the ability of the section at the small hole.
本发明的有益效果是： 本发明从考虑应力应变的角度出发， 改变了原有的 基于强度考虑的方法。本发明的非均质阀体型芯芯骨， 使得型芯能在满足强 度和刚性要求的同时， 使得应变均匀， 并能有效降低射砂时的阻碍。 由此 大幅提高了形状复杂精度要求较高阀体铸件的精度，并使铸件变形均匀可控， 减少了加工余量， 降低了后续机加工的难度， 获得了更高的产品合格率。 The beneficial effects of the present invention are: The present invention changes the original strength-based method from the viewpoint of stress and strain. The heterogeneous valve body core core of the invention enables the core to meet the strength and rigidity requirements while making the strain uniform, and can effectively reduce the obstacles during sand shooting. Thereby, the precision of the valve body casting with high shape and high precision is greatly improved, the deformation of the casting is uniform and controllable, the machining allowance is reduced, the difficulty of subsequent machining is reduced, and a higher product qualification rate is obtained.
附图说明 下面结合附图和实施例对本发明进一步说明。 BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be further described with reference to the drawings and embodiments.
图 1是现有技术的一实施方式的结构示意图； 1 is a schematic structural view of an embodiment of the prior art;
图 2是现有技术的另一实施方式的结构示意图； 2 is a schematic structural view of another embodiment of the prior art;
图 3是本发明的实施例一的芯骨展开示意图； 3 is a schematic exploded view of a core bone according to Embodiment 1 of the present invention;
图 4是本发明的实施例二的芯骨展开示意图； 4 is a schematic exploded view of a core bone according to a second embodiment of the present invention;
图 5是本发明的实施例三的芯骨展开示意图； Figure 5 is a schematic exploded view of a core bone according to a third embodiment of the present invention;
其中： 1.大孔， 2.小孔， 11.大孔一， 12.大孔二。 具体实施方式 现在结合附图对本发明作进一步详细的说明。 这些附图均为简化的示意图， 仅以示意方式说明本发明的基本结构， 因此其仅显示与本发明有关的构成。 Among them: 1. Large hole, 2. Small hole, 11. Large hole one, 12. Large hole two. DETAILED DESCRIPTION OF THE INVENTION The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, and only the basic structure of the invention is illustrated in a schematic manner, and thus only the configurations related to the present invention are shown.
一种非均质阀体型芯芯骨， 具有空心管芯骨， 芯骨的壁体上开有大小及排布 不均匀的孔， 大小及排布不均匀的孔包括： 芯骨的壁体上多个局部区域开有多
个大孔 1， 芯骨的壁体上多个另一局部区域开有多个小孔 2; 大孔 1的面积大于 小孔的面积 2，局部区域开有大孔 1处的截面受力能力小于另一局部区域开有小 孔 2处的截面受力能力。 具体实施例一： 如图 3所示， 根据受力情况， 一种非均质阀体型芯芯骨， 具有空心管芯骨， 芯骨的壁体上开有大小及排布不均匀的孔。 大小及排布不均匀的孔包括： 芯骨 的壁体上多个局部区域开有多个大孔 1，芯骨的壁体上多个另一局部区域开有多 个小孔 2。 芯骨的壁体上多个局部区域开有多个大孔 1具体为：芯骨的壁体前端开有水 平间隔排列的两个大孔一 11， 芯骨的壁体中部至后端开设有间隔排列的三排大 孔二 12， 每排大孔包括竖直排列的两个大孔二 12， 大孔一 11 的面积大于大孔 二 12的面积， 大孔一 11处的截面受力能力小于小孔处的截面受力能力， 大孔 二 12处的截面受力能力小于大孔一 11处的截面受力能力。 大孔一 11、 大孔二 12、 小孔 2 均为圆形孔。 使用该非均质阀体型芯芯骨的阀体型芯射砂后， 未见 型芯不实； 充型冷却后， 铸件合格， 且阀体铸件流道形变较均匀。 具体实施例二： 如图 4所示， 根据受力情况， 一种非均质阀体型芯芯骨， 具有空心管芯骨， 芯骨的壁体上开有大小及排布不均匀的孔。 大小及排布不均匀的孔包括： 芯骨 的壁体上多个局部区域开有多个大孔 1，芯骨的壁体上多个另一局部区域开有多 个小孔 2。 芯骨的壁体上多个局部区域开有多个大孔 1具体为：芯骨的壁体前端开有竖 直排列的两个大孔 1，芯骨的壁体中部至后端开设有水平间隔排列的两个大孔 1。
芯骨的壁体上多个另一局部区域开有多个小孔 2具体为： 两个大孔 1 的间 隔中开有水平间隔排列的两个小孔 2，后一大孔 1与芯骨的壁体底端之间的间隔 内开有水平间隔排列的两个小孔 2。 A non-homogeneous valve body core core having a hollow core, a wall having a size and uneven arrangement on the wall of the core bone, and a hole having a size and uneven arrangement includes: a wall of the core bone How many local areas are open a large hole 1, a plurality of other partial regions on the wall of the core bone are provided with a plurality of small holes 2; the area of the large holes 1 is larger than the area 2 of the small holes, and the cross-sectional force at the large area 1 is opened in the local area Less than the other partial area, the cross-sectional force at the small hole 2 is opened. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 1: As shown in FIG. 3, according to the force, a non-homogeneous valve body core core has a hollow core, and the wall of the core is provided with holes of uneven size and arrangement. The holes having uneven size and arrangement include: a plurality of partial regions on the wall of the core bone are provided with a plurality of large holes 1 , and a plurality of other partial regions on the wall of the core bone are provided with a plurality of small holes 2 . The plurality of partial regions on the wall of the core bone are provided with a plurality of large holes 1 in particular: the front end of the wall of the core bone is provided with two large holes 11 arranged horizontally, and the central portion of the core body is open to the rear end Three rows of large holes 2 are arranged at intervals, each row of large holes includes two large holes 2 vertically arranged, the area of the large holes 11 is larger than the area of the large holes 12, and the cross-section capacity of the large holes 11 It is smaller than the section's ability to bear at the small hole. The section of the large hole at 12 is less than the capacity of the large hole and 11 section. The large hole 11 , the large hole 2 12 , and the small hole 2 are all circular holes. After the valve body core of the heterogeneous valve body core core is used for shot blasting, no core is found to be unreal; after filling and cooling, the casting is qualified, and the flow passage of the valve body casting is more uniform. Specific Embodiment 2: As shown in FIG. 4, according to the force situation, a non-homogeneous valve body core core has a hollow core bone, and the wall of the core bone is provided with holes of different sizes and arrangement. The holes having uneven size and arrangement include: a plurality of partial regions on the wall of the core bone are provided with a plurality of large holes 1 , and a plurality of other partial regions on the wall of the core bone are provided with a plurality of small holes 2 . The plurality of partial regions on the wall of the core bone are provided with a plurality of large holes 1 in particular: the front end of the wall of the core bone is provided with two large holes 1 arranged vertically, and the center of the core body is opened horizontally to the rear end. Two large holes 1 arranged at intervals. A plurality of small holes 2 are formed in a plurality of other partial regions on the wall of the core bone. Specifically, the two large holes 1 are separated by two small holes 2 arranged horizontally, and the rear large holes 1 and the core bone Two small holes 2 are arranged horizontally spaced apart in the space between the bottom ends of the walls.
大孔 1和小孔 2均为方形孔。 使用该非均质阀体型芯芯骨的阀体型芯射砂 后， 未见型芯不实； 充型冷却后， 铸件合格， 且阀体铸件流道形变较均匀。 具体实施例三： 如图 5所示， 一种非均质阀体型芯芯骨， 具有空心管芯骨， 芯骨的壁体上 开有大小及排布不均匀的孔。 大小及排布不均匀的孔包括： 芯骨的壁体上多个 局部区域开有多个大孔 1， 芯骨的壁体上多个另一局部区域开有多个小孔 2。 芯骨的壁体上多个局部区域开有多个大孔 1具体为：芯骨的壁体上局部区域 开有多排面积渐变的大孔 1。 Both the large hole 1 and the small hole 2 are square holes. After the valve body core of the heterogeneous valve body core core is used for shot blasting, no core is found to be unreal; after filling and cooling, the casting is qualified, and the flow passage of the valve body casting is more uniform. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 3: As shown in FIG. 5, a non-homogeneous valve body core core has a hollow core, and a wall having a size and uneven arrangement is formed on the wall of the core. The holes having uneven size and arrangement include: a plurality of partial regions on the wall of the core bone are provided with a plurality of large holes 1, and a plurality of other partial regions on the wall of the core bone are provided with a plurality of small holes 2. A plurality of large holes are formed in a plurality of partial regions on the wall of the core bone. Specifically, the partial area on the wall of the core bone is opened with a plurality of large holes having a gradient of a plurality of rows.
芯骨的壁体上多个另一局部区域开有多个小孔 2具体为：芯骨的壁体上另一 局部区域开有多排面积渐变的小孔 2，大孔 1处的截面受力能力小于小孔 2处的 截面受力能力。 A plurality of small holes 2 are formed in a plurality of other partial regions on the wall of the core bone. Specifically, another partial area on the wall of the core bone is provided with a plurality of small holes 2 having a gradual change in area, and the cross section at the large hole 1 is affected by The force capacity is smaller than the section force capability at the small hole 2.
本发明从考虑应力应变的角度出发， 改变了原有的基于强度考虑的方法。 本发明的非均质阀体型芯芯骨， 着重分析型芯上的特征部位， 基于弱处补强、 强处略增的思路， 根据型芯各截面受力情况调整强度， 使得型芯能在满足强度 和刚性要求的同时， 使得应变均匀， 并能有效降低射砂时的阻碍。 由此大幅提 高了形状复杂精度要求较高阀体铸件的精度， 并使铸件变形均匀可控， 减少了 加工余量， 降低了后续机加工的难度， 获得了更高的产品合格率。 The present invention changes the original method based on strength considerations from the viewpoint of stress and strain. The heterogeneous valve body core core of the invention focuses on analyzing the characteristic parts on the core, and based on the idea of weakening the strength and slightly increasing the strength, adjusting the strength according to the force of each section of the core, so that the core can While meeting the strength and rigidity requirements, the strain is uniform and the obstacles during sand shooting can be effectively reduced. Therefore, the precision of the valve body casting with high shape and high precision is greatly improved, and the deformation of the casting is uniform and controllable, the machining allowance is reduced, the difficulty of subsequent machining is reduced, and a higher product qualification rate is obtained.
以上述依据本发明的理想实施例为启示， 通过上述的说明内容， 相关工作 人员完全可以在不偏离本项发明技术思想的范围内， 进行多样的变更以及修改。
本项发明的技术性范围并不局限于说明书上的内容， 必须要根据权利要求范围 来确定其技术性范围。
In view of the above-described embodiments of the present invention, various changes and modifications can be made by those skilled in the art without departing from the scope of the present invention. The technical scope of the present invention is not limited to the contents of the specification, and the technical scope thereof must be determined according to the scope of the claims.
Claims
1、 一种非均质阀体型芯芯骨， 其特征在于： 具有空心管芯骨， 所述芯骨 的壁体上开有大小及排布不均匀的孔， 所述大小及排布不均匀的孔包括： 所述 芯骨的壁体上至少一个局部区域开有一个以上的大孔， 所述芯骨的壁体上至少 一个另一局部区域开有一个以上的小孔； 所述大孔的面积大于小孔的面积， 局 部区域开有大孔处的截面受力能力小于另一局部区域开有小孔处的截面受力能 力。 1. A non-homogeneous valve type core bone, characterized in that: it has a hollow tube core bone, and the wall of the core bone is provided with holes of uneven size and arrangement, and the size and arrangement are uneven. The holes include: more than one large hole is opened in at least one local area of the wall of the core bone, and more than one small hole is opened in at least another local area of the wall of the core bone; the large hole The area of is larger than the area of small holes, and the cross-sectional stress capacity of a local area with large holes is smaller than the cross-sectional stress capacity of another local area with small holes.
2、 根据权利要求 1所述的非均质阀体型芯芯骨， 其特征在于： 所述芯骨 的壁体上至少一个局部区域开有一个以上的大孔具体为： 所述芯骨的壁体前端 开有水平间隔排列的两个大孔一， 所述芯骨的壁体中部至后端开设有间隔排列 的三排大孔二， 每排大孔包括竖直排列的两个大孔二， 所述大孔一的面积大于 大孔二的面积， 所述大孔一处的截面受力能力小于小孔处的截面受力能力， 所 述大孔二处的截面受力能力小于大孔一处的截面受力能力。 2. The non-homogeneous valve type core bone according to claim 1, characterized in that: at least one local area on the wall of the core bone is provided with more than one large hole, specifically: the wall of the core bone The front end of the body is provided with two large holes arranged horizontally at intervals. The core bone is provided with three rows of large holes arranged at intervals from the middle to the rear end of the wall. Each row of large holes includes two large holes arranged vertically. , the area of the large hole one is larger than the area of the large hole two, the cross-sectional force bearing capacity of the large hole one is smaller than the cross-sectional force bearing capacity of the small hole, the cross-sectional force bearing capacity of the large hole two is smaller than the large hole The force-bearing capacity of a section.
3、 根据权利要求 2所述的非均质阀体型芯芯骨， 其特征在于： 所述大孔 和小孔均为圆形孔。 3. The non-homogeneous valve type core core according to claim 2, characterized in that: the large hole and the small hole are both circular holes.
4、 根据权利要求 1所述的非均质阀体型芯芯骨， 其特征在于： 所述芯骨 的壁体上至少一个局部区域开有一个以上的大孔具体为： 所述芯骨的壁体前端 开有竖直排列的两个大孔， 所述芯骨的壁体中部至后端开设有水平间隔排列的 两个大孔； 所述芯骨的壁体上至少一个另一局部区域开有一个以上的小孔具体为： 两 个大孔的间隔中开有水平间隔排列的两个小孔， 后一大孔与芯骨的壁体底端之 间的间隔内开有水平间隔排列的两个小孔。 4. The non-homogeneous valve type core bone according to claim 1, characterized in that: at least one local area on the wall of the core bone is provided with more than one large hole, specifically: the wall of the core bone There are two large holes arranged vertically at the front end of the body, and two large holes arranged horizontally from the middle to the rear end of the wall of the core bone. At least one other local area of the wall of the core bone is opened. There are more than one small holes, specifically: there are two small holes arranged at horizontal intervals in the interval between the two large holes, and there are horizontally spaced holes in the interval between the last large hole and the bottom end of the wall of the core bone. Two small holes.
5、 根据权利要求 4所述的非均质阀体型芯芯骨， 其特征在于： 所述大孔
和小孔均为方形孔。 5. The heterogeneous valve type core core according to claim 4, characterized in that: the large hole and small holes are all square holes.
6、 根据权利要求 1所述的非均质阀体型芯芯骨， 其特征在于： 所述芯骨 的壁体上局部区域开有多排面积渐变的大孔， 所述芯骨的壁体上另一局部区域 开有多排面积渐变的小孔， 大孔处的截面受力能力小于小孔处的截面受力能 力。
6. The non-homogeneous valve type core bone according to claim 1, characterized in that: the wall body of the core bone is provided with multiple rows of large holes with gradually changing areas in a local area, and the wall body of the core bone is provided with a plurality of large holes. Another local area has multiple rows of small holes with gradually changing areas, and the cross-sectional stress capacity at the large holes is smaller than the cross-sectional stress capacity at the small holes.
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| CN201210497433.3 | 2012-11-29 | ||
| CN201210497433.3A CN102974766B (en) | 2012-11-29 | 2012-11-29 | Mold core arbor for heterogeneous valve body |
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| WO2014082388A1 true WO2014082388A1 (en) | 2014-06-05 |
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| PCT/CN2013/071242 WO2014082388A1 (en) | 2012-11-29 | 2013-02-01 | Heterogeneous valve body core frame |
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| CN110976781A (en) * | 2020-01-08 | 2020-04-10 | 西华大学 | Sand casting core making process adopting rotary type telescopic core rod |
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| US1618130A (en) * | 1925-04-27 | 1927-02-15 | Valley Mould & Iron Corp | Core bar |
| CN86209099U (en) * | 1986-11-13 | 1987-10-07 | 沈阳高中压阀门厂 | Centre-hollow sand core for casting with thin wall |
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| US5479981A (en) * | 1993-12-29 | 1996-01-02 | Hyundai Motor Company | Method for casting a hollow camshaft for internal combustion engine |
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| CN102974766B (en) | 2014-09-24 |
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