CN114570886A - Method for embedding steel wire in non-exposed manner in manufacturing process of slender sand core - Google Patents
Method for embedding steel wire in non-exposed manner in manufacturing process of slender sand core Download PDFInfo
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- CN114570886A CN114570886A CN202210138442.7A CN202210138442A CN114570886A CN 114570886 A CN114570886 A CN 114570886A CN 202210138442 A CN202210138442 A CN 202210138442A CN 114570886 A CN114570886 A CN 114570886A
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- Prior art keywords
- steel wire
- core
- sand core
- core box
- sand
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 99
- 239000010959 steel Substances 0.000 title claims abstract description 99
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000003068 static effect Effects 0.000 claims abstract description 14
- 239000004576 sand Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000005266 casting Methods 0.000 abstract description 22
- 238000012545 processing Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- B22C9/106—Vented or reinforced cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/06—Core boxes
Abstract
The invention discloses a method for embedding steel wires without exposure in the process of manufacturing a slender sand core, which comprises the following steps: step 1: prefabricating three step-shaped hanging needles according to actual core manufacturing requirements; and 2, step: the prefabricated hanging needle is sequentially installed in the core box cavity, and the hanging needle has certain offset compared with the steel wire, so that the steel wire can be extruded more suitably as required, and the position of the steel wire is controlled. Has the advantages that: according to the invention, the three hanging needles are arranged in the cavity in the sand core static core box in an offset manner in advance, so that the steel wire can be arranged in a suspended and limited manner at the central position of the cavity of the core box, the steel wire can be completely wrapped after the sand core is formed, the steel wire is positioned at the central position of the formed sand core, the exposure of the steel wire after the sand core is formed and the overlarge offset of the steel wire relative to the center of the sand core after the sand core is formed are avoided, the forming quality of the sand core is greatly improved, and the rejection rate of a casting during processing is further reduced.
Description
Technical Field
The invention relates to the technical field of casting mold design and core making process, in particular to a method for embedding steel wires in a slender sand core without exposing in the manufacturing process.
Background
In the process of manufacturing the casting sand core, in order to ensure that the sand core for casting has certain strength and is not easy to break, a steel wire needs to be arranged in the center of the sand core when the sand core is manufactured, so that the cast casting caused by the breakage of the sand core is prevented from being scrapped.
At present, the method for internally arranging the steel wire in the sand core is to directly place the steel wire with the corresponding shape into a core box for manufacturing the sand core, then sand shooting and curing are carried out, finally the sand core is taken out from the core box, the steel wire is arranged in the sand core, the steel wire can not be effectively arranged in the sand core by adopting the method for arranging the steel wire in the sand core, and a very long part is exposed outside the sand core, namely the steel wire can not be completely surrounded by the sand core; the steel wire is repaired by using the repair mud and can not be covered because the repair mud is difficult to adhere to the steel wire, and the repair mud is coated on the surfaces of the steel wire and the sand core and is easy to fall off because of low adhesive force, so that the steel wire exposed on the surface of the sand core is melted by the high temperature of the molten iron when the molten iron is cast, and the melted steel wire is adhered with the casting, so that the steel wire cannot be taken out of the casting, and the casting is scrapped; on the other hand, the steel wire is easy to be deviated, and is not positioned in the central part of the cross section of the sand core, so that the strength of the sand core is reduced, the sand core is easy to damage and deform, the quality of the casting is influenced by using the damaged and deformed sand core, and the casting is even scrapped.
Disclosure of Invention
Technical problem to be solved
In view of the technical defects and application requirements, the invention provides a method for embedding a steel wire in a slender sand core without exposure in the manufacturing process, and aims to solve the problems that the steel wire is easy to expose or deflect in the conventional method for embedding the steel wire in the sand core, and the steel wire is molten and is adhered to a casting, the sand core is broken, the casting quality is influenced, and even the casting is scrapped when the sand core with the exposed or deflected steel wire is used for producing the casting.
(II) technical scheme
The invention achieves the above purpose through the following technical scheme:
a method for building-in a steel wire without exposure during the production of an elongated sand core, comprising the steps of:
step 1: prefabricating three step-shaped hanging needles according to actual core manufacturing requirements;
step 2: the prefabricated hanging needles are sequentially arranged in the core box cavity, and the hanging needles have a certain offset compared with the steel wires, so that the steel wires can be more appropriately extruded according to the requirements, and the positions of the steel wires are controlled;
and step 3: the steel wire to be placed in the sand core is sequentially contacted with the conical end of the hanging needle, and the steel wire is prepressed and fixed under the self elastic action in a pressing mode;
and 4, step 4: after the steel wires are laid, the sand material for manufacturing the sand core is injected into the cavity of the core box and is solidified, so that the sand core can be prefabricated and formed, and the steel wires can be completely wrapped in the sand core.
Furthermore, the core box core making forming part consists of a static core box and a movable core box, the static core box is fixed during core making, the position of the movable core box is changed to carry out die assembly and die separation, a core box cavity is formed by die assembly of the static core box and the movable core box, and a hanging needle for fixing a steel wire is arranged in the static core box.
Furthermore, the contact end of the hanging needle and the steel wire in the step 1 adopts a conical structure, so that the steel wire is conveniently pressed into a position, the steel wire is pressed more and more tightly, and the hanging needle can be easily pulled out of the sand core during core pulling; in the step 1, the connecting end of the hanging needle and the core box cavity adopts a thread structure, so that the hanging needle is convenient and fast to install.
Furthermore, the steel wire is just located at the central position of the core box cavity after being fixed in the step 3, the position of the hanging needle is reasonably offset to enable the steel wire to generate elastic force with proper size, the steel wire can be reliably placed in the middle of the core box cavity by utilizing the conical end of the hanging needle and the elastic force of the steel wire, the purpose that the steel wire is located in the middle of the sand core is achieved after core making, of course, three small round holes are formed in the sand core made in the way, but the small round holes are very easy to fill, the repairing mud is adopted to fill and repair, the repairing mud is used for repairing and filling the small holes, the steel wire is firm and cannot fall off, and the problem that the steel wire 2 is exposed in the sand core and is adhered to a casting during casting is thoroughly solved.
(III) advantageous effects
According to the invention, the three hanging needles are arranged in the cavity in the sand core static core box in an offset manner in advance, so that the steel wire can be arranged in a suspended and limited manner in the central position of the cavity of the core box, the steel wire can be completely wrapped after the sand core is formed, the steel wire is positioned in the central position of the formed sand core, the exposure of the steel wire after the sand core is formed and the overlarge offset of the steel wire relative to the center of the sand core after the sand core is formed are avoided, the forming quality of the sand core is greatly improved, the rejection rate of a casting during casting processing is further reduced, and particularly the rejection rate of the casting, which is firmly adhered to the casting after the steel wire is locally melted by molten iron due to the exposure of the steel wire in the sand core, is reduced.
Drawings
FIG. 1 is a front view of a thimble used in a method of the present invention for building in a steel wire without exposing the steel wire during the manufacture of an elongated sand core;
FIG. 2 is a first schematic view showing the positional relationship among a hanging needle, a core box cavity and a steel wire in the method for embedding the steel wire in a non-exposed manner during the manufacturing process of the long and thin sand core according to the present invention;
FIG. 3 is a second schematic diagram showing the positional relationship among a hanging needle, a core box cavity and a steel wire in the method for embedding the steel wire in the slender sand core without exposure in the manufacturing process of the slender sand core.
The reference numerals are explained below:
1. hanging a needle; 2. a steel wire; 3. the core box is provided with a cavity.
Detailed Description
A method for internally installing a steel wire in a core making process without exposing the steel wire, comprising the steps of:
step 1: prefabricating three step-shaped hanging needles 1 according to actual core manufacturing requirements;
step 2: the prefabricated hanging needle 1 is sequentially arranged in a core box cavity 3, and the hanging needle 1 has a certain offset compared with the steel wire 2, so that the steel wire 2 can be more properly extruded as required, and the position of the steel wire 2 is controlled;
and 3, step 3: the steel wire 2 to be placed in the sand core is sequentially contacted with the conical end of the hanging needle 1, and the steel wire 2 is prepressed and fixed under the self elastic action in a pressing mode;
and 4, step 4: after the steel wires 2 are laid, the sand for manufacturing the sand core is injected into the core box cavity 3 and solidified, so that the sand core can be prefabricated and formed, and the steel wires 2 can be completely wrapped in the sand core.
Preferably, the core box core making forming part consists of a static core box and a movable core box, the static core box is fixed during core making, the position of the movable core box is changed to carry out die assembly and die separation, a core box cavity 3 is formed by die assembly of the static core box and the movable core box, and a hanging needle 1 for fixing a steel wire 2 is arranged in the static core box.
Preferably, the contact end of the hanging needle 1 and the steel wire 2 in the step 1 adopts a conical structure, so that the steel wire 2 is conveniently pressed into a position, the more tightly the steel wire is pressed, and the hanging needle 1 can be easily pulled out of the sand core during core pulling; in the step 1, the connecting end of the hanging needle 1 and the core box cavity 3 adopts a thread structure, so that the hanging needle 1 is convenient to install.
Preferably, in the step 3, the steel wire 2 is just positioned at the central position of the core box cavity 3 after being fixed, the hanging needle 1 is reasonably biased to enable the steel wire 2 to generate elastic force with proper size, the conical end of the hanging needle 1 and the elastic force of the steel wire 2 are utilized, the steel wire 2 can be reliably arranged in the middle of the core box cavity 3, the purpose that the steel wire 2 is positioned in the middle of a sand core is achieved after core making, of course, three small round holes are formed in the sand core made in the mode, but the small round holes are very easy to fill, the repairing mud is adopted to fill and repair, the small holes are firmly filled with the repairing mud and cannot fall off, and therefore the problem that the steel wire 2 is exposed in the sand core and the steel wire 2 is adhered to a casting during casting is thoroughly solved.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. A method for internally installing a steel wire without exposing the steel wire during the manufacturing process of a slender sand core is characterized in that: it comprises the following steps:
step 1: three step-shaped hanging needles (1) are prefabricated according to actual core making requirements;
and 2, step: the prefabricated hanging needle (1) is sequentially arranged in a core box cavity (3), and the hanging needle (1) has a certain offset compared with the steel wire (2), so that the steel wire (2) can be more appropriately extruded as required, and the position of the steel wire (2) is controlled;
and step 3: the steel wire (2) to be placed in the sand core is sequentially contacted with the conical end of the hanging needle (1), and the steel wire (2) is pre-pressed and fixed under the self elastic action in a pressing mode;
and 4, step 4: after the steel wires (2) are laid, the sand material for manufacturing the sand core is injected into the core box cavity (3) and solidified, so that the sand core can be prefabricated and formed, and the steel wires (2) can be completely wrapped in the sand core.
2. A method for the unexposed embedment of the steel wire during the production of the elongated sand core according to claim 1, wherein: the core box core making forming part consists of a static core box and a movable core box, the static core box is fixed during core making, the position of the movable core box is changed to carry out die assembly and die separation, a core box cavity (3) is formed by assembling the static core box and the movable core box, and a hanging needle (1) for fixing a steel wire (2) is arranged in the static core box.
3. A method for the unexposed embedment of the steel wire during the production of the elongated sand core according to claim 1, wherein: in the step 1, the contact end of the hanging needle (1) and the steel wire (2) adopts a conical structure, and the connecting end of the hanging needle (1) and the core box cavity (3) in the step 1 adopts a threaded structure.
4. A method for internally threading steel wire during the manufacture of an elongated sand core as claimed in claim 1, wherein: in the step 3, the steel wire (2) is just positioned at the center of the core box cavity (3) after being fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210138442.7A CN114570886A (en) | 2022-02-15 | 2022-02-15 | Method for embedding steel wire in non-exposed manner in manufacturing process of slender sand core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210138442.7A CN114570886A (en) | 2022-02-15 | 2022-02-15 | Method for embedding steel wire in non-exposed manner in manufacturing process of slender sand core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114570886A true CN114570886A (en) | 2022-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210138442.7A Pending CN114570886A (en) | 2022-02-15 | 2022-02-15 | Method for embedding steel wire in non-exposed manner in manufacturing process of slender sand core |
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| Country | Link |
|---|---|
| CN (1) | CN114570886A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2302068Y (en) * | 1996-12-30 | 1998-12-30 | 郑克孝 | Cold-rolled ribbed reinforcing steel straightening machine |
| CA2583505A1 (en) * | 2004-08-25 | 2006-03-09 | Martin Zoldan | Pre-tensioned sand core |
| WO2008128451A1 (en) * | 2007-04-19 | 2008-10-30 | Csr Meishan Rolling Stock Co. Ltd | One-piece core manufacturing method for swing bolster and sideframe of lorry |
| CN102152052A (en) * | 2011-04-13 | 2011-08-17 | 浙江大学 | Clamp for welding middle slot of scraper conveyor and using method of clamp |
| CN204700238U (en) * | 2015-06-12 | 2015-10-14 | 新兴重工湖北三六一一机械有限公司 | A kind of core box |
| CN210789005U (en) * | 2019-09-12 | 2020-06-19 | 北龙建设集团有限公司 | Bending device for construction steel bar |
| DE212020000558U1 (en) * | 2020-12-17 | 2021-11-08 | Jiangsu Fangshiyuanlve Scientific And Technological Consulting Co., Ltd | Sand core of a valve covered with sand |
-
2022
- 2022-02-15 CN CN202210138442.7A patent/CN114570886A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2302068Y (en) * | 1996-12-30 | 1998-12-30 | 郑克孝 | Cold-rolled ribbed reinforcing steel straightening machine |
| CA2583505A1 (en) * | 2004-08-25 | 2006-03-09 | Martin Zoldan | Pre-tensioned sand core |
| WO2008128451A1 (en) * | 2007-04-19 | 2008-10-30 | Csr Meishan Rolling Stock Co. Ltd | One-piece core manufacturing method for swing bolster and sideframe of lorry |
| CN102152052A (en) * | 2011-04-13 | 2011-08-17 | 浙江大学 | Clamp for welding middle slot of scraper conveyor and using method of clamp |
| CN204700238U (en) * | 2015-06-12 | 2015-10-14 | 新兴重工湖北三六一一机械有限公司 | A kind of core box |
| CN210789005U (en) * | 2019-09-12 | 2020-06-19 | 北龙建设集团有限公司 | Bending device for construction steel bar |
| DE212020000558U1 (en) * | 2020-12-17 | 2021-11-08 | Jiangsu Fangshiyuanlve Scientific And Technological Consulting Co., Ltd | Sand core of a valve covered with sand |
Non-Patent Citations (1)
| Title |
|---|
| 沈其文，阳国柱: "吹气硬化法芯盒工装设计", 中国铸造装备与技术, no. 02, 7 April 1995 (1995-04-07) * |
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