CN111099498A - A kind of hanging structure and hanging method of 3D printing sand core - Google Patents

A kind of hanging structure and hanging method of 3D printing sand core Download PDF

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Publication number
CN111099498A
CN111099498A CN201911248573.5A CN201911248573A CN111099498A CN 111099498 A CN111099498 A CN 111099498A CN 201911248573 A CN201911248573 A CN 201911248573A CN 111099498 A CN111099498 A CN 111099498A
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sand core
spreader
hole
hoisting
slot
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CN201911248573.5A
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Inventor
杨锌
孙建新
边毅
张博
刘新超
王目孔
张铁军
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Beijing Hangxing Machinery Manufacturing Co Ltd
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Beijing Hangxing Machinery Manufacturing Co Ltd
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Priority to CN201911248573.5A priority Critical patent/CN111099498A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
    • B66C1/66—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof
    • 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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

本发明提供了一种3D打印砂芯吊挂结构及吊挂方法，该吊挂方法通过吊挂结构实施，过程为：在3D打印砂芯设计过程中，在砂芯的内部预留出吊运孔槽，吊运孔槽位于砂芯的中上部且吊运孔槽的开口位于砂芯上表面；吊运孔槽由吊具装入孔以及吊具支撑槽组成，吊具装入孔伸入砂芯内部，吊具支撑槽与吊具装入孔异位但于吊具装入孔末端连通；吊运孔槽与吊具配做，吊具由吊具装入孔进入吊运孔槽，然后通过吊具支撑槽装卡固定，最后通过外部吊运装备吊运吊具实现对砂芯的吊运。本发明有效解决了大型3D打印砂芯在吊运过程中，砂芯吊运结构无法预埋的问题，采用吊运孔槽和吊具的配合，吊运过程安全平稳，吊运方便，便于推广利用。

Figure 201911248573

The invention provides a 3D printing sand core hanging structure and a hanging method. The hanging method is implemented by the hanging structure. The process is as follows: in the process of designing the 3D printing sand core, a hoisting method is reserved inside the sand core. The hole and slot, the hoisting hole and slot are located in the middle and upper part of the sand core, and the opening of the hoisting hole slot is located on the upper surface of the sand core; the hoisting hole and slot are composed of a sling loading hole and a sling supporting slot, and the sling loading hole extends into Inside the sand core, the support groove of the spreader and the mounting hole of the spreader are out of position but connected to the end of the mounting hole of the spreader; Then it is clamped and fixed through the support groove of the spreader, and finally the sand core is hoisted by the external hoisting equipment and the hoisting sling. The invention effectively solves the problem that the hoisting structure of the sand core cannot be pre-buried during the hoisting process of the large-scale 3D printing sand core, and adopts the cooperation of the hoisting hole and the hoisting tool, the hoisting process is safe and stable, the hoisting is convenient, and the promotion is convenient. use.

Figure 201911248573

Description

Hanging structure and hanging method of 3D printing sand core
Technical Field
The invention belongs to the field of casting processing, and relates to a hanging structure and a hanging method of a 3D printing sand core.
Background
In recent years, the sand mold 3D printing technology has been rapidly applied to the field of casting processing, and becomes an important technology for shortening the development period and reducing the development cost in casting. Compared with the traditional sand mold preparation process, the most important characteristic of the 3D printing of the sand mold is a digital mold-free casting technology. Because can't be directly through pre-buried core bone or cable suspension device, the hoist and mount of 3D printing sand mould, psammitolite mainly through the suspender or design sand matter lifting handle etc. in the sand mould outside. However, for hoisting and transporting the sand core, the hoisting and transporting by using the hoisting belt often has the problems of damage to a molding surface, unstable gravity center and the like. On one hand, the sand lifting handle increases the size of the sand core, not only increases the printing cost, but also is easily limited by the size of the printing equipment; on the other hand, in the mould assembling fastening process, the mould assembling fastening process generally needs to be sawed and ground at the later stage, and the precision of a forming surface is influenced.
Disclosure of Invention
The invention mainly solves the problem that a sand core lifting structure cannot be pre-buried in the lifting process of the large 3D printing sand core. On the premise of not damaging the molding surface of the sand core, a safe and stable lifting tool and a lifting method are provided, a lifting hole groove is reserved in the sand core, lifting can be completed by means of a lifting appliance which is manufactured by matching with the lifting hole groove, and the lifting appliance can be removed after lifting is completed, so that normal box closing and pouring can be completed.
The invention aims to provide the following technical scheme:
in a first aspect, the present invention provides a hanging method for a 3D printing sand core, comprising the following steps:
in the 3D printing sand core design process, a hoisting hole groove is reserved in the sand core, the hoisting hole groove is positioned at the middle upper part of the sand core, and an opening of the hoisting hole groove is positioned on the upper surface of the sand core;
the lifting hole groove consists of a lifting appliance loading hole and a lifting appliance supporting groove, the lifting appliance loading hole extends into the sand core, and the lifting appliance supporting groove is ectopic with the lifting appliance loading hole but communicated with the tail end of the lifting appliance loading hole;
the lifting hole groove and the lifting appliance are matched, the lifting appliance enters the lifting hole groove through the lifting appliance loading hole, then the lifting appliance is clamped and fixed through the lifting appliance supporting groove, and finally the lifting appliance is lifted through external lifting equipment to realize lifting of the sand core.
In a second aspect, the present invention provides a hanging structure for a 3D printing sand core, for implementing the hanging method according to the first aspect, the hanging structure comprising: a hoisting hole groove and a lifting appliance matched with the hoisting hole groove are reserved in the sand core;
the lifting hole groove is positioned at the middle upper part of the sand core, the opening of the lifting hole groove is arranged on the upper surface, the lifting hole groove consists of a lifting appliance loading hole and a lifting appliance supporting groove, and the lifting appliance supporting groove and the lifting appliance loading hole are heterotopic but are communicated with the tail end of the lifting appliance loading hole;
the lifting appliance comprises a lifting appliance supporting arm, a lifting rod and lifting rings, wherein the lifting rod is fixed on the lifting appliance supporting arm, the lifting rings are fixed at the uppermost end of the lifting rod, the lifting appliance supporting arm is positioned in the lifting appliance supporting groove after the lifting appliance and the lifting hole groove are assembled, and the lifting rod is positioned in a lifting appliance loading hole.
According to the hanging structure and the hanging method for the 3D printing sand core, provided by the invention, beneficial technical effects are brought:
(1) the hanger used by the method is simple to prepare, safe and durable;
(2) the lifting hole groove is matched with the lifting appliance, so that the lifting process is safe and stable, and the lifting is convenient;
(3) according to the invention, the size of the sand core is not increased by the lifting hole slot, the printing space of 3D printing equipment can be fully utilized, and the molding surface is prevented from being damaged; meanwhile, the lifting hole groove is beneficial to exhaust in the casting pouring process, and is matched with an air hole and the like for use, so that the defects of casting air holes and the like can be reduced.
Drawings
FIG. 1 shows a top and side cross-sectional view of a lifting eye socket in a preferred embodiment of the invention;
fig. 2 shows a schematic view of a spreader structure in a preferred embodiment of the invention.
Detailed Description
The invention is explained in more detail below with reference to the figures and examples. The features and advantages of the present invention will become more apparent from the description.
According to a first aspect of the present invention, as shown in fig. 1 and 2, the present invention provides a hanging method for a 3D printing sand core, the hanging method comprising the steps of:
in the 3D printing sand core design process, a hoisting hole groove is reserved in the sand core, the hoisting hole groove is positioned at the middle upper part of the sand core, and an opening of the hoisting hole groove is positioned on the upper surface of the sand core;
the lifting hole groove consists of a lifting appliance loading hole and a lifting appliance supporting groove, the lifting appliance loading hole extends into the sand core, and the lifting appliance supporting groove is ectopic with the lifting appliance loading hole but communicated with the tail end of the lifting appliance loading hole;
the lifting hole groove and the lifting appliance are matched, the lifting appliance enters the lifting hole groove through the lifting appliance loading hole, then the lifting appliance is clamped and fixed through the lifting appliance supporting groove, and finally the lifting of the sand core is realized through external lifting equipment such as a crane lifting appliance. And after the lifting is finished, removing the lifting appliance, and then normally pouring the sand mould in a mould assembling manner.
In the invention, one or more lifting hole grooves can be arranged, and when one lifting hole groove is arranged, the symmetrical center of the lifting hole groove is positioned right above the center of mass of the sand core; when the handling hole groove is a plurality of, fortune hole groove all is located the well upper portion of psammitolite, and is the symmetric distribution to psammitolite focus is stable during the messenger handling.
In the invention, the edge of the lifting hole groove is ensured to have a certain sand eating amount, and the distance between the lifting hole groove and the outer edge forming surface is preferably not less than 100 mm; the distance between the lifting appliance supporting groove and the upper surface of the sand core is not less than 100 mm.
The lifting appliance comprises a lifting appliance supporting arm, a lifting rod and a lifting ring, wherein the lifting rod is fixed on the lifting appliance supporting arm, the lifting ring is fixed at the uppermost end of the lifting rod, after the lifting appliance is assembled with a lifting hole groove, the lifting appliance supporting arm is positioned in the lifting appliance supporting groove, and the lifting rod is positioned in a lifting appliance installing hole;
the lifting appliance supporting arm and the lifting rod are both obtained by assembling or welding circular tubes or circular rod structures, and are convenient to insert into the lifting hole groove and finish fixing.
In the invention, the circular tubes or the circular rods forming the supporting arms of the lifting appliance are all on the same plane, namely the heights of the circular tubes or the circular rods are the same. Thus, the supporting arms of the lifting appliance extend into the sand core to the same depth.
Preferably, the structure of hoist support arm is symmetrical structure for the psammitolite atress is more even.
More preferably, the spreader support arms are m-, X-or I-shaped.
Correspondingly, the main section of the hanger supporting groove is of a symmetrical structure such as a Chinese character 'mi', an X-shaped or I-shaped structure, and the surface matched with the hanger supporting arm is of an arc surface structure.
In the invention, the size of the lifting appliance loading hole is slightly larger than that of the lifting appliance, and a gap of 3-5 mm is generally ensured between the lifting appliance and the lifting appliance when the lifting appliance is loaded. The length of the supporting groove of the lifting appliance is slightly longer than that of the supporting arm of the lifting appliance by 5-10 mm, and the radius of the supporting groove of the lifting appliance is the same as or slightly larger than that of the supporting arm of the lifting appliance, so that the lifting appliance is convenient to clamp and fix.
The strength of the hoisting hole slot structure is checked, and the check is carried out according to a certain safety factor by calculating the weight of the sand core and combining the strength of the sand core. The safety coefficient generally takes 1.5-2.0 to ensure that the depth of the lifting hole groove meets the requirement.
The depth of the hole groove is 200 mm-400 mm for sand core with weight of 500 kg-1 t.
In the invention, when the upper surface of the sand core is a molding surface, the lifting hole groove part can be designed into a core assembly structure, namely, a 3D printing method is adopted to prepare the sand core matched with the lifting hole groove, and after lifting is finished, the sand core of the lifting hole groove is assembled, namely, the upper molding surface is not influenced.
According to a second aspect of the invention, as shown in fig. 1 and 2, the 3D printing sand core hanging structure provided by the invention comprises a hanging hole groove reserved in the sand core and a lifting appliance matched with the hanging hole groove;
the lifting hole groove is positioned at the middle upper part of the sand core, the opening of the lifting hole groove is arranged on the upper surface, the lifting hole groove consists of a lifting appliance loading hole and a lifting appliance supporting groove, and the lifting appliance supporting groove and the lifting appliance loading hole are heterotopic but are communicated with the tail end of the lifting appliance loading hole;
the lifting appliance comprises a lifting appliance supporting arm, a lifting rod and lifting rings, wherein the lifting rod is fixed on the lifting appliance supporting arm, the lifting rings are fixed at the uppermost end of the lifting rod, the lifting appliance supporting arm is positioned in the lifting appliance supporting groove after the lifting appliance and the lifting hole groove are assembled, and the lifting rod is positioned in a lifting appliance loading hole.
In the invention, one or more lifting hole grooves can be arranged, and when one lifting hole groove is arranged, the symmetrical center of the lifting hole groove is positioned right above the center of mass of the sand core; when the lifting hole grooves are multiple, the lifting hole grooves are all located on the middle upper portion of the sand core and are symmetrically distributed. The edge of the lifting hole groove is ensured to have certain sand eating amount, and the distance between the lifting hole groove and the outer edge forming surface is preferably not less than 100 mm; the distance between the hanger supporting groove and the non-forming surface is not less than 100 mm.
In the invention, the hanger supporting arm and the hanger rod are both assembled or welded by a round pipe or round rod structure. The round pipes or round bars forming the supporting arms of the lifting appliance are all on the same plane, namely the heights of the round pipes or round bars are the same. Thus, the supporting arms of the lifting appliance extend into the sand core to the same depth.
Furthermore, the structure of the lifting appliance supporting arm is of a symmetrical structure, so that the stress of the sand core is more uniform.
Furthermore, the hanger supporting arm is in a shape like a Chinese character mi, an X or an I.
Correspondingly, the main section of the hanger supporting groove is of a symmetrical structure such as a Chinese character 'mi', an X-shaped or I-shaped structure, and the surface matched with the hanger supporting arm is of an arc surface structure.
In the invention, the size of the lifting appliance loading hole is slightly larger than that of the lifting appliance, and a gap of 3-5 mm is generally ensured between the lifting appliance and the lifting appliance when the lifting appliance is loaded. The length of the supporting groove of the lifting appliance is slightly longer than that of the supporting arm of the lifting appliance by 5-10 mm, and the radius of the supporting groove of the lifting appliance is the same as or slightly larger than that of the supporting arm of the lifting appliance, so that the lifting appliance is convenient to clamp and fix.
It should be noted that the lifting hole slot and the lifting appliance structure related to the hanging structure and the hanging method in the invention can be properly changed according to the structural characteristics of the sand core. For example, the transformation of a swing support arm structure, the change of a lifting ring into a lifting hook, etc.
The present invention has been described above in connection with preferred embodiments, but these embodiments are merely exemplary and merely illustrative. On the basis of the above, the invention can be subjected to various substitutions and modifications, and the substitutions and the modifications are all within the protection scope of the invention.

Claims (10)

1.一种3D打印砂芯的吊挂方法，其特征在于，该吊挂方法包括以下步骤：1. a hanging method of 3D printing sand core, is characterized in that, this hanging method comprises the following steps: 在3D打印砂芯设计过程中，在砂芯的内部预留出吊运孔槽，吊运孔槽位于砂芯的中上部且吊运孔槽的开口位于砂芯上表面；During the design process of the 3D printing sand core, a hoisting hole slot is reserved inside the sand core, the hoisting hole slot is located in the middle and upper part of the sand core, and the opening of the hoisting hole slot is located on the upper surface of the sand core; 吊运孔槽由吊具装入孔以及吊具支撑槽组成，吊具装入孔伸入砂芯内部，吊具支撑槽与吊具装入孔异位但于吊具装入孔末端连通；The hoisting hole slot is composed of the sling loading hole and the sling supporting slot. The sling loading hole extends into the sand core, and the sling supporting slot is different from the sling loading hole but is connected to the end of the sling loading hole; 吊运孔槽与吊具配做，吊具由吊具装入孔进入吊运孔槽，然后通过吊具支撑槽装卡固定，最后通过外部吊运装备吊运吊具实现对砂芯的吊运。The hoisting hole and slot are matched with the sling. The sling enters the hoisting slot through the sling loading hole, then is clamped and fixed through the sling support slot, and finally the sand core is lifted by the hoisting sling through the external hoisting equipment. transport. 2.根据权利要求1所述的3D打印砂芯的吊挂方法，其特征在于，吊运孔槽可以为一个或多个；2. The method for hanging a 3D printed sand core according to claim 1, characterized in that, the number of hoisting holes can be one or more; 当吊运孔槽为一个时，吊运孔槽的对称中心位于砂芯质心的垂直正上方；当吊运孔槽为多个时，吊运孔槽均位于砂芯的中上部且呈对称分布。When there is one hoisting hole and slot, the symmetrical center of the hoisting hole and slot is located vertically above the centroid of the sand core; when there are more than one hoisting hole and slot, the hoisting and transporting holes and slots are located in the middle and upper part of the sand core and are symmetrically distributed . 3.根据权利要求1所述的3D打印砂芯的吊挂方法，其特征在于，吊运孔槽距外缘成型面的距离不低于100mm，吊具支撑槽距离砂芯上表面的距离不低于100mm。3. The method for hanging a 3D printed sand core according to claim 1, wherein the distance between the lifting hole groove and the outer edge forming surface is not less than 100mm, and the distance between the hanger support groove and the upper surface of the sand core is not less than 100 mm. below 100mm. 4.根据权利要求1所述的3D打印砂芯的吊挂方法，其特征在于，吊具由吊具支撑臂、吊杆以及吊环组成，吊杆固定在吊具支撑臂上，吊环固定在吊杆最上端，吊具与吊运孔槽装配完成后，吊具支撑臂位于吊具支撑槽中，吊杆位于吊具装入孔中；4. The method for hanging a 3D printed sand core according to claim 1, wherein the hanger is composed of a hanger support arm, a hanger rod, and a hanger ring, the hanger rod is fixed on the hanger support arm, and the hanger ring is fixed on the hanger At the upper end of the rod, after the spreader is assembled with the lifting hole and slot, the support arm of the spreader is located in the support groove of the spreader, and the boom is located in the mounting hole of the spreader; 其中，吊具支撑臂和吊杆均为圆管或圆棒结构装配或焊接得到。Wherein, the sling support arm and the suspender are assembled or welded in a round tube or round bar structure. 5.根据权利要求4所述的3D打印砂芯的吊挂方法，其特征在于，构成吊具支撑臂的圆管或圆棒结构均在同一平面上，即圆管或圆棒结构高度相同。5 . The method for hanging a 3D printed sand core according to claim 4 , wherein the round tubes or round rod structures constituting the support arm of the spreader are all on the same plane, that is, the round tubes or round rod structures have the same height. 6 . 6.根据权利要求5所述的3D打印砂芯的吊挂方法，其特征在于，吊具支撑臂的结构为对称结构。6 . The method for hanging a 3D printed sand core according to claim 5 , wherein the structure of the support arm of the spreader is a symmetrical structure. 7 . 7.根据权利要求6所述的3D打印砂芯的吊挂方法，其特征在于，吊具支撑臂的结构为米字型、X型或I型对称结构。7 . The method for hanging a 3D printed sand core according to claim 6 , wherein the structure of the support arm of the spreader is an M-shaped, X-shaped or I-shaped symmetrical structure. 8 . 8.根据权利要求7所述的3D打印砂芯的吊挂方法，其特征在于，吊具支撑槽的主截面为对称结构，其与吊具支撑臂配合的面为弧面结构。8 . The method for hanging a 3D printed sand core according to claim 7 , wherein the main section of the support groove of the spreader is a symmetrical structure, and the surface that cooperates with the support arm of the spreader is an arc structure. 9 . 9.根据权利要求8所述的3D打印砂芯的吊挂方法，其特征在于，吊具装入孔尺寸略大于吊具尺寸，吊具装入时与吊具存在3～5mm间隙；吊具支撑槽长度比吊具支撑臂略长5～10mm，吊具支撑槽半径与吊具支撑臂相同或略大。9 . The method for hanging a 3D printed sand core according to claim 8 , wherein the size of the mounting hole of the spreader is slightly larger than the size of the spreader, and there is a gap of 3-5mm between the spreader and the spreader when the spreader is loaded; The length of the support groove is slightly 5-10mm longer than the support arm of the spreader, and the radius of the support groove of the spreader is the same or slightly larger than that of the support arm of the spreader. 10.一种3D打印砂芯的吊挂，其用于实施权利要求1至9之一所述的方法，其特征在于，该吊挂结构包括砂芯的内部预留出吊运孔槽、以及与吊运孔槽配合的吊具；10. A suspension of a 3D printed sand core, which is used to implement the method according to any one of claims 1 to 9, wherein the suspension structure comprises a suspension hole reserved in the interior of the sand core, and The spreader matched with the lifting hole and slot; 吊运孔槽位于砂芯的中上部且吊运孔槽的开口在上表面上，吊运孔槽由吊具装入孔以及吊具支撑槽组成，吊具支撑槽与吊具装入孔异位但与吊具装入孔末端连通；The hoisting hole slot is located in the middle and upper part of the sand core and the opening of the hoisting hole slot is on the upper surface. The hoisting hole slot is composed of the sling loading hole and the sling supporting slot. The sling loading slot is different from the sling loading hole. but connected to the end of the mounting hole of the spreader; 吊具由吊具支撑臂、吊杆以及吊环组成，吊杆固定在吊具支撑臂上，吊环固定在吊杆最上端，吊具与吊运孔槽装配完成后，吊具支撑臂位于吊具支撑槽中，吊杆位于吊具装入孔中。The spreader consists of a spreader support arm, a boom and a lifting ring. The boom is fixed on the spreader support arm, and the lifting ring is fixed at the upper end of the boom. After the spreader and the lifting hole are assembled, the spreader support arm is located in the spreader. In the support groove, the boom is located in the mounting hole of the spreader.
CN201911248573.5A 2019-12-09 2019-12-09 A kind of hanging structure and hanging method of 3D printing sand core Pending CN111099498A (en)

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CN113135494A (en) * 2021-05-14 2021-07-20 天津爱思达航天科技有限公司 Non-convex hoisting mechanism
CN113173484A (en) * 2021-04-29 2021-07-27 共享智能铸造产业创新中心有限公司 Sand mould hoisting structure

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CN203428740U (en) * 2013-08-29 2014-02-12 广西南南铝加工有限公司 Hoisting tool
CN205056954U (en) * 2015-10-10 2016-03-02 四川南车共享铸造有限公司 3D prints psammitolite
CN105598381A (en) * 2016-02-02 2016-05-25 宁夏共享模具有限公司 Sand core manufacturing process based on 3D printing and sand core hoisting tool based on 3D printing
CN207581208U (en) * 2017-09-27 2018-07-06 宜昌南玻硅材料有限公司 A kind of dual-purpose crystal holder boom hoisting

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113173484A (en) * 2021-04-29 2021-07-27 共享智能铸造产业创新中心有限公司 Sand mould hoisting structure
CN113135494A (en) * 2021-05-14 2021-07-20 天津爱思达航天科技有限公司 Non-convex hoisting mechanism

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Application publication date: 20200505