CN112122554A - Positioning method of slender sand core for casting - Google Patents
Positioning method of slender sand core for casting Download PDFInfo
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- CN112122554A CN112122554A CN202011055353.3A CN202011055353A CN112122554A CN 112122554 A CN112122554 A CN 112122554A CN 202011055353 A CN202011055353 A CN 202011055353A CN 112122554 A CN112122554 A CN 112122554A
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- core
- sand
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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
- B22C9/108—Installation of cores
Abstract
The invention relates to positioning of a slender core of a cast hole workpiece, in particular to a positioning method of a slender sand core for casting, and belongs to the technical field of casting. The method comprises the following specific steps: core setting, box assembling, core positioning and sand filling and leveling; the invention adopts the mode that the lower positioning core is matched with the core head of the slender sand core and is matched with the inner wall of the sand box, thereby ensuring the precise positioning of the slender sand core, and being capable of adjusting the position of the sand core, thereby being capable of controlling the accuracy of the hole; the box closing operation is convenient, the generation of knocking sand or the breaking of a sand core is avoided, and the generation of accessories is reduced.
Description
Technical Field
The invention relates to positioning of a slender core of a cast hole workpiece, in particular to a positioning method of a slender sand core for casting, and belongs to the technical field of casting.
Background
The shaping of elongated apertures during casting of cast bore workpieces is accomplished by elongated sand cores. The positioning method of the conventional slender sand core in the workpiece cavity comprises the following steps: and positioning the upper core outlet head and the lower core outlet head of the sand core. The sand core is positioned inaccurately and always deflects due to overhigh sand core, the upper core head and the lower core head cannot be seen when the sand core is closed, the sand is easy to knock, particularly, the upper box has a plurality of core heads, the accuracy of the hole cannot be controlled, and the sand core can be knocked off when the box is closed.
Disclosure of Invention
The invention aims to provide a positioning method of a slender sand core for casting, aiming at achieving the purposes of accurate casting hole position and avoiding breaking the sand core when a sand box is combined.
In order to achieve the purpose, the invention adopts the technical scheme that: the positioning method of the slender sand core for casting comprises the following specific steps:
(1) preparing a model with the same shape as the workpiece, and forming a workpiece sand mold cavity in a sand box;
(2) core setting: a slender sand core is arranged in the sand mold cavity of the workpiece;
(3) closing the sand box: the core head of the slender sand core in the step (2) is higher than the upper end surface of the sand mold cavity, and the upper sand box with the through hole is covered on the upper end surface of the sand mold cavity, so that the center position of the through hole of the upper sand box corresponds to the center position of the core head of the slender sand core higher than the upper end surface of the sand mold cavity;
(4) a lower positioning core: a positioning core is arranged in the through hole of the closed upper sand box cover, and the shape of the lower part of the positioning core is matched with the shape of the outer surface of the core head of the slender sand core;
the height of the positioning core is lower than that of the upper end surface of the cope box;
(5) after the positioning core and the core head of the slender sand core are positioned in the step (4), a gap area is formed between the upper end of the positioning core and the inner side wall of the through hole of the cope box;
(6) filling sand and blocking flat: filling and leveling with sand in the gap area; and completing the positioning of the whole elongated sand core.
Furthermore, the core head of the slender sand core higher than the upper end surface of the sand mould cavity is of a trapezoidal structure;
furthermore, the inner diameter of the through hole of the cope flask is larger than the maximum diameter of the core print, so that the space of the through hole is enlarged, whether the core print is proper or not can be seen from the through hole when the cope flask is assembled, and the adjustment is convenient;
furthermore, the through hole of the cope flask is of a T-shaped table structure consisting of inclined steps;
furthermore, the outer contour of the positioning core is of a T-shaped structure, a groove is formed in the upper end face of the positioning core, and the positioning core and an inclined step of the through hole of the cope flask form a matching surface; the center of the lower part of the positioning core is provided with an inclined plane structure matched with the core print, so that the inside of the positioning core is tightly matched with the core print, and the outside of the positioning core is tightly matched with the inner wall of the through hole of the cope flask;
furthermore, the upper end surface and the groove part of the positioning core and the inner side wall of the through hole of the cope flask form a gap area of the cope flask, and the gap area is used for filling sand and blocking the sand.
The invention has the beneficial effects that:
the lower positioning core is matched with the core head of the slender sand core and matched with the inner wall of the sand box, so that the precise positioning of the slender sand core is ensured, the position of the sand core can be adjusted, and the accuracy of the hole can be controlled; the box closing operation is convenient, the generation of knocking sand or the breaking of a sand core is avoided, and the generation of accessories is reduced.
Drawings
Fig. 1 is a schematic view of the state of a lower elongated sand core in the positioning method of the elongated sand core of the present invention.
FIG. 2 is a schematic view showing the state of the cope flask in the positioning method for the long sand core according to the present invention.
Fig. 3 is a schematic view of the state of a lower positioning core in the positioning method of the long sand core of the present invention.
FIG. 4 is a schematic diagram of a filling sand leveling state in the positioning method of the long sand core of the present invention.
In the figure, 1, a sand mold cavity, 2, an elongated sand core, 3, a cope flask, 4, a cope flask through hole, 5, a positioning core, 6, a positioning core groove, 7 and a cope flask gap area.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1-4, the positioning method of the slender sand core for casting comprises the following specific steps:
(1) preparing a model with the same shape as a workpiece, and forming a workpiece sand mold cavity 1 in a sand box;
(2) core setting: a slender sand core 2 is arranged in a workpiece sand mold cavity 1;
(3) closing the sand box: the core head of the slender sand core 2 in the step (2) is higher than the upper end surface of the sand mold cavity 1, and the upper sand box 3 with the through hole is covered on the upper end surface of the sand mold cavity 1, so that the central position of the through hole 4 of the upper sand box 3 corresponds to the central position of the core head of the slender sand core 1 higher than the upper end surface of the sand mold cavity 1;
(4) a lower positioning core: a positioning core 5 is arranged in the through hole 4 after the upper sand box 3 is covered, the shape of the lower part of the positioning core 5 is matched with the shape of the outer surface of the core head of the slender sand core 1, and the height of the positioning core 5 is lower than that of the upper end surface of the upper sand box 3;
(5) after the positioning core 5 and the core head of the slender sand core 1 are positioned in the step (4), a gap area 7 is formed between the upper end of the positioning core 5 and the inner side wall of the through hole 4 of the cope flask 3;
(6) filling sand and blocking flat: filling and leveling with sand in the gap area 7; and completing the positioning of the whole elongated sand core.
The core head of the slender sand core 1 higher than the upper end surface of the sand mold cavity 1 is of a trapezoidal structure;
the inner diameter of the through hole 4 of the cope flask is larger than the maximum diameter of the core print, and the space of the through hole 4 is enlarged, so that whether the core print is proper or not can be seen from the through hole 4 when the cope flask 3 is assembled, and the adjustment is convenient;
the through hole 4 of the cope flask is of a T-shaped table structure consisting of inclined steps;
the outer contour of the positioning core 5 is of a T-shaped structure, a groove 6 is arranged on the upper end surface of the positioning core 5, and the positioning core 5 and the inclined step of the through hole 4 of the cope flask form a matching surface; the center of the lower part of the positioning core 5 is provided with an inclined plane structure matched with the core print, so that the inside of the positioning core 5 is tightly matched with the core print, and the outside of the positioning core 5 is tightly matched with the inner wall of the through hole 4 of the cope flask;
the upper end surface of the positioning core 5, the groove 6 and the inner side wall of the through hole 4 of the cope flask form a gap area 7 of the cope flask for filling sand and leveling.
Claims (7)
1. The positioning method of the slender sand core for casting is characterized by comprising the following steps: the method comprises the following specific steps:
(1) preparing a model with the same shape as the workpiece, and forming a workpiece sand mold cavity in a sand box;
(2) core setting: a slender sand core is arranged in the sand mold cavity of the workpiece;
(3) closing the sand box: the core head of the slender sand core in the step (2) is higher than the upper end surface of the sand mold cavity, and the upper sand box with the through hole is covered on the upper end surface of the sand mold cavity, so that the center position of the through hole of the upper sand box corresponds to the center position of the core head of the slender sand core higher than the upper end surface of the sand mold cavity;
(4) a lower positioning core: a positioning core is arranged in the through hole of the closed upper sand box cover, and the shape of the lower part of the positioning core is matched with the shape of the outer surface of the core head of the slender sand core;
(5) after the positioning core and the core head of the slender sand core are positioned in the step (4), a gap area is formed between the upper end of the positioning core and the inner side wall of the through hole of the cope box;
(6) filling sand and blocking flat: filling and leveling with sand in the gap area; and completing the positioning of the whole elongated sand core.
2. The method of positioning an elongated sand core for casting of claim 1, wherein: the height of the positioning core is lower than that of the upper end surface of the cope box.
3. The method of positioning an elongated sand core for casting of claim 1, wherein: the core head of the slender sand core higher than the upper end surface of the sand mould cavity is of a trapezoidal structure.
4. The method of positioning an elongated sand core for casting of claim 1, wherein: the inner diameter of the through hole of the cope box is larger than the maximum diameter of the core head.
5. The method of positioning an elongated sand core for casting of claim 1, wherein: the through hole of the cope flask is of a T-shaped table structure formed by inclined steps.
6. The method of positioning an elongated sand core for casting of claim 1, wherein: the outer contour of the positioning core is of a T-shaped structure, a groove is formed in the upper end face of the positioning core, and the positioning core and the inclined step of the through hole of the cope flask form a matching surface; the center of the lower part of the positioning core is provided with an inclined plane structure matched with the core print, so that the inside of the positioning core is tightly matched with the core print, and the outside of the positioning core is tightly matched with the inner wall of the through hole of the cope flask.
7. The method of positioning an elongated sand core for casting of claim 6, wherein: the upper end surface and the groove part of the positioning core and the inner side wall of the through hole of the cope flask form a gap area of the cope flask.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011055353.3A CN112122554B (en) | 2020-09-30 | 2020-09-30 | Positioning method of slender sand core for casting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011055353.3A CN112122554B (en) | 2020-09-30 | 2020-09-30 | Positioning method of slender sand core for casting |
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| CN112122554A true CN112122554A (en) | 2020-12-25 |
| CN112122554B CN112122554B (en) | 2022-08-16 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252456A (en) * | 2013-04-25 | 2013-08-21 | 吴江市液铸液压件铸造有限公司 | Bent sand core |
| CN106111910A (en) * | 2016-07-29 | 2016-11-16 | 共享装备股份有限公司 | The method that core print and casting mold rub sand is overlapped and is prevented in protection for casting mould |
| CN106734964A (en) * | 2017-03-29 | 2017-05-31 | 共享装备股份有限公司 | Casting mold and casting method for casting elongated oil tubing casting |
| CN207655861U (en) * | 2017-12-23 | 2018-07-27 | 潍柴重机股份有限公司 | A kind of casting mould with bolt hole core |
| CN207770759U (en) * | 2017-12-29 | 2018-08-28 | 山东豪迈机械科技股份有限公司 | A kind of sand casting sand core combination structure and gas turbine cylinder |
-
2020
- 2020-09-30 CN CN202011055353.3A patent/CN112122554B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252456A (en) * | 2013-04-25 | 2013-08-21 | 吴江市液铸液压件铸造有限公司 | Bent sand core |
| CN106111910A (en) * | 2016-07-29 | 2016-11-16 | 共享装备股份有限公司 | The method that core print and casting mold rub sand is overlapped and is prevented in protection for casting mould |
| CN106734964A (en) * | 2017-03-29 | 2017-05-31 | 共享装备股份有限公司 | Casting mold and casting method for casting elongated oil tubing casting |
| CN207655861U (en) * | 2017-12-23 | 2018-07-27 | 潍柴重机股份有限公司 | A kind of casting mould with bolt hole core |
| CN207770759U (en) * | 2017-12-29 | 2018-08-28 | 山东豪迈机械科技股份有限公司 | A kind of sand casting sand core combination structure and gas turbine cylinder |
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| CN112122554B (en) | 2022-08-16 |
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