CN113020546A - Positioning structure and method for special-shaped structure casting mold - Google Patents
Positioning structure and method for special-shaped structure casting mold Download PDFInfo
- Publication number
- CN113020546A CN113020546A CN202110270489.4A CN202110270489A CN113020546A CN 113020546 A CN113020546 A CN 113020546A CN 202110270489 A CN202110270489 A CN 202110270489A CN 113020546 A CN113020546 A CN 113020546A
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- positioning
- mold
- core
- boss
- bottom plate
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- 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 provides a positioning structure of a casting die with a special-shaped structure, which comprises a positioning bottom plate, an outer die and a sand core, wherein the outer die and the sand core are arranged on the positioning bottom plate, the sand core is positioned in the outer die, the upper end of the positioning bottom plate is provided with a first boss, an annular runner is arranged around the first boss, the lower end of the runner is provided with a pouring gate, one side of the runner, which is close to the boss, is provided with an inner flange, the inner side of the inner flange is matched with the outer side of the sand core, one side of the runner, which is close to the edge of the positioning bottom plate, is provided with an outer flange, two sides of the upper end of the outer flange are provided with positioning rods, the upper ends of the. By adopting the invention, the operation amount of detecting and adjusting the size in the box closing process is small, the assembly difficulty and the labor intensity are reduced, and the yield and the quality of the casting are improved; the error of the upper end of the outer die is reduced, the thickness of the casting is ensured, and the material utilization rate is improved.
Description
Technical Field
The invention relates to the technical field of casting mold assembly positioning, in particular to a positioning structure and a positioning method for a special-shaped casting mold.
Background
In the casting process of a casting, a manual mould closing method is generally adopted in the traditional method when the sand core and the external mould are assembled. Namely, after the outer mold sand box and the sand core are manufactured, the sand core is placed on a cast bottom plate, and then the sand box is lifted and closed. And after the mould assembling is finished, detecting by using a special template, manually moving the sand box, and adjusting the size by using a measuring rod to ensure that the relative position of the sand core and the sand box meets the process design.
The process mainly aims at castings with regular shapes, and in the operation process, deviation in the assembling process is difficult to ensure, so that the size error of the castings is large, a large amount of machining allowance needs to be reserved on the process design of the castings to ensure the wall thickness of the castings, and materials are wasted. In addition, the manual box closing requires higher operation skill of an operator, casting scrapping is easily caused by improper operation, and the labor intensity is very high. If a casting with an irregular special-shaped structure, such as a frame shape, is given, the casting cannot be subjected to size detection and positioning by the traditional process in the mould closing process, the casting is scrapped due to the fact that the size of the casting is out of tolerance when the casting has a deviation of 0.1mm, and the overall quality of the casting is difficult to guarantee.
Disclosure of Invention
In order to solve the technical problems, the invention provides a positioning structure and a positioning method for a special-shaped structure casting mold.
The invention is realized by the following technical scheme.
The invention provides a positioning structure of a casting die with a special-shaped structure, which comprises a positioning bottom plate, an outer die and a sand core, wherein the outer die and the sand core are arranged on the positioning bottom plate, the sand core is positioned in the outer die, the upper end of the positioning bottom plate is provided with a first boss, an annular runner is arranged around the first boss, the lower end of the runner is provided with a pouring gate, one side of the runner, which is close to the boss, is provided with an inner flange, the inner side of the inner flange is matched with the outer side of the sand core, one side of the runner, which is close to the edge of the positioning bottom plate, is provided with an outer flange, two sides of the upper end of the outer flange are provided with positioning rods, the upper ends of the positioning rods.
The outer die comprises a plurality of split dies which are arranged in a stacking mode, a positioning rod is arranged between every two adjacent split dies, and the upper end of one split die is closed.
And the connecting part of the outer die and the positioning rod is a counter bore.
A first gap is formed between the upper end of the positioning rod and the upper bottom of the counter bore.
The upper end of the sub-mold is provided with a first sand collecting groove around the positioning rod.
The positioning bottom plate upper end encircles the locating lever and is equipped with first sand collecting tank.
The sand core comprises a plurality of core heads, the core heads are arranged in a stacking mode, the upper end of one core head is connected with the outer die through a positioning lock ring, the upper ends of the other core heads are provided with second bosses, two adjacent core heads are connected through the second bosses, and the lower core head is connected with the positioning bottom plate through the first bosses.
And a second gap is formed between the upper ends of the first boss and the second boss and one core print above the first boss and the second boss.
And second sand collecting grooves are formed in the edges of the first boss and the second boss.
And a third gap is formed between the upper end of the positioning lock ring and the upper end of the annular groove of the outer die.
The invention also provides a positioning method of the special-shaped structure casting mold, which comprises the following steps:
a. firstly, carrying out structural analysis on a casting drawing, determining the modulus of the external mold and the core print number of the sand core, and respectively manufacturing a positioning bottom plate, a core print, a mold splitting and a positioning lock ring;
b. placing a first core print on a positioning bottom plate, embedding positioning rods on outer baffle sides on two sides of the positioning bottom plate in advance, inserting the upper ends of the positioning rods into holes reserved at the lower ends of split molds, and placing a first split mold;
c. referring to step b, placing a second core print on the first core print, placing a second split mold on the first split mold, and so on until the last core print is placed;
d. and placing a positioning lock ring above the last core print, pre-embedding a positioning rod on the penultimate parting die, then placing the last parting die, and inserting the upper end of the positioning lock ring into an annular groove preset on the upper bottom surface of the inner cavity of the last parting die to finish die assembly.
The invention has the beneficial effects that:
by adopting the mould positioning device, the upper mould is positioned by utilizing the flexibility of the positioning column, the sand core is positioned by utilizing the first boss and the inner flange, the operation amount of detecting and adjusting the size in the mould closing process is small, the assembly difficulty and the labor intensity are reduced, and the yield and the quality of castings are improved; the sand core and the upper part of the outer die are locked by the positioning lock ring, so that the error of the upper end of the outer die is reduced, the thickness of a casting is ensured, and the material utilization rate is improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1-positioning a bottom plate; 2-external mold; 3-sand core; 4-positioning the rod; 5-pouring channel; 6-inner flange; 7-outer flange; 8-a first boss; 9-a second boss; 10-positioning the locking ring; 11-a first void; 12-a first sand trap; 13-a second void; 14-a second sand trap; 15-third voids.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
Fig. 1 shows a schematic structural diagram of the present invention:
the invention provides a positioning structure of a casting die with a special-shaped structure, which comprises a positioning bottom plate 1, an outer die 2 and a sand core 3, wherein the outer die 2 and the sand core 3 are arranged on the positioning bottom plate 1, the sand core 3 is positioned in the outer die 2, the upper end of the positioning bottom plate 1 is provided with a first boss 8, an annular runner 5 is arranged around the first boss 8, the lower end of the runner 5 is provided with a casting opening, one side of the runner 5, which is close to the boss, is provided with an inner flange 6, the inner side of the inner flange 6 is matched with the outer side of the sand core 3, one side of the runner 5, which is close to the edge of the positioning bottom plate 1, is provided with an outer flange 7, two sides of the upper end of the outer flange 7 are provided with positioning rods 4, the upper ends of the positioning rods 4 extend into the outer die 2, the.
When the mould is closed by adopting the mould closing device, the sand core 3 is firstly placed on the positioning bottom plate 1, the sand core 3 is positioned through the first boss 8 and the inner flange 6, and then the outer mould 2 is placed on the positioning bottom plate 1. When the outer die 2 is placed, a positioning rod 4 is pre-embedded in an outer flange 7 of the positioning bottom plate 1, a positioning lock ring 10 is arranged in an annular groove at the upper end of the sand core 3, the positioning rod 4 above the sand core 3 extends into a hole corresponding to the outer die 2, then the outer die 2 is moved downwards, the position of the outer die 2 is finely adjusted in the moving-downwards process by utilizing the flexibility of the positioning rod 4, the positioning rod 4 is kept vertical, the outer die 2 is ensured to be in a standard position, and finally the positioning lock ring 10 is inserted into the annular groove of the upper die to.
By adopting the invention, the upper die is positioned by utilizing the flexibility of the positioning column, the sand core 3 is positioned by utilizing the first boss 8 and the inner flange 6, the operation amount of detecting and adjusting the size in the box closing process is small, the assembly difficulty and labor intensity are reduced, and the yield and quality of the casting are improved; the positioning lock ring 10 is used for locking the sand core 3 and the upper part of the outer mold 2, so that the error of the upper end of the outer mold 2 is reduced, the thickness of a casting is ensured, and the material utilization rate is improved.
The outer die 2 comprises a plurality of split dies which are arranged in a laminating mode, a positioning rod 4 is arranged between every two adjacent split dies, and the upper end of one split die is closed. The outer molds 2 can be assembled one by one conveniently, and large castings with complex structures, such as thin-wall type or frame type castings, can be produced conveniently.
And the connecting part of the outer die 2 and the positioning rod 4 is a counter bore. Ensuring the strength and stability of the outer die 2.
A first gap 11 is arranged between the upper end of the positioning rod 4 and the upper bottom of the counter bore. The movement allowance of the positioning rod 4 is ensured, and the positioning rod 4 is prevented from causing axial force damage to the upper die.
The upper end of the sub-mould is provided with a first sand collecting groove 12 around the positioning rod 4. A small amount of sand that drops because the friction of locating lever 4 is collected when being convenient for assemble and divide the mould, prevents to appear the gap between the mould.
The upper end of the positioning bottom plate 1 is provided with a first sand collecting groove 12 around the positioning rod 4. Collect a small amount of sand that drops because locating lever 4 friction when being convenient for assemble the mould, prevent to divide the gap to appear between the mould.
The sand core 3 comprises a plurality of core heads, the core heads are arranged in a stacking mode, the upper end of one core head is connected with the outer die 2 through a positioning lock ring 10, the upper ends of the other core heads are provided with second bosses 9, two adjacent core heads are connected through the second bosses 9, and the lower core head is connected with the positioning bottom plate 1 through a first boss 8. It is convenient to assemble the sand cores 3 one by one, thereby facilitating the production of large castings of complicated structures, such as frame-shaped castings.
And a second gap 13 is arranged between the upper ends of the first boss 8 and the second boss 9 and a core print above the first boss and the second boss. The movable allowance of the core print is convenient to guarantee, the lower end face of the core print is prevented from generating gaps, and meanwhile, the core print is enabled to be stressed uniformly.
And the edges of the first boss 8 and the second boss 9 are provided with a second sand collecting groove 14. Collect a small amount of sand that first boss 8, second boss 9 and core head friction dropped when being convenient for assemble the core head, prevent that the gap from appearing in the terminal surface under the core head.
A third gap 15 is arranged between the upper end of the positioning lock ring 10 and the upper end of the annular groove of the outer die 2. The moving allowance of the external mold 2 is ensured, and the local concentrated stress of the core head and the external mold 2 is prevented.
The invention also provides a positioning method of the special-shaped structure casting mold, which comprises the following steps:
a. firstly, carrying out structural analysis on a casting drawing, determining the number of split dies of the external die 2 and the number of core heads of the sand core 3, and respectively manufacturing a positioning bottom plate 1, the core heads, the split dies and a positioning lock ring 10;
b. firstly, placing a first core print on a positioning bottom plate 1, pre-burying a positioning rod 4 on outer flanges 7 on two sides of the positioning bottom plate 1, then inserting the upper end of the positioning rod 4 into a hole reserved at the lower end of a split mold, and placing a first split mold;
c. referring to step b, placing a second core print on the first core print, placing a second split mold on the first split mold, and so on until the last core print is placed;
d. and (3) placing a positioning lock ring 10 above the last core print, pre-embedding a positioning rod 4 on the last but one parting die, then placing the last parting die, and inserting the upper end of the positioning lock ring 10 into an annular groove preset on the upper bottom surface of the inner cavity of the last parting die to finish die assembly.
Claims (10)
1. The utility model provides a dysmorphism structure foundry goods mould location structure which characterized in that: comprises a positioning bottom plate (1), an outer mold (2) and a sand core (3), wherein the outer mold (2) and the sand core (3) are arranged on the positioning bottom plate (1), the sand core (3) is positioned in the outer mold (2), a first boss (8) is arranged at the upper end of the positioning bottom plate (1), an annular runner (5) is arranged around the first boss (8), the lower end of the runner (5) is provided with a pouring gate, one side of the runner (5) close to the boss is provided with an inner flange (6), the inner side of the inner flange (6) is matched with the outer side of the sand core (3), one side of the runner (5) close to the edge of the positioning bottom plate (1) is provided with an outer flange (7), two sides of the upper end of the outer flange (7) are provided with positioning rods (4), the upper end of each positioning rod (4) extends into the outer mold (2), the lower end of the sand core (3) is provided with an indent, a positioning lock ring (10) is arranged in the annular groove.
2. The positioning structure of the special-shaped structure casting mold as claimed in claim 1, wherein: the outer die (2) comprises a plurality of split dies which are arranged in a stacking mode, a positioning rod (4) is arranged between every two adjacent split dies, and the upper end of one split die is closed.
3. The positioning structure of the special-shaped structure casting mold as claimed in claim 1 or 2, wherein: the connecting part of the outer die (2) and the positioning rod (4) is a counter bore.
4. The positioning structure of the special-shaped structure casting mold as claimed in claim 3, wherein: a first gap (11) is arranged between the upper end of the positioning rod (4) and the upper bottom of the counter bore.
5. The positioning structure of the special-shaped structure casting mold as claimed in claim 2, wherein: and a first sand collecting groove (12) is arranged at the upper end of the sub-mold around the positioning rod (4).
6. The positioning structure of the special-shaped structure casting mold as claimed in claim 1, wherein: the sand core (3) comprises a plurality of core heads, the core heads are arranged in a stacking mode, the upper end of one core head is connected with the outer die (2) through a positioning lock ring (10), the upper ends of the other core heads are respectively provided with a second boss (9), two adjacent core heads are connected through the second bosses (9), and the lower core head is connected with the positioning bottom plate (1) through a first boss (8).
7. The positioning structure of the special-shaped structure casting mold as claimed in claim 6, wherein: and a second gap (13) is arranged between the upper ends of the first boss (8) and the second boss (9) and a core print above the first boss.
8. The positioning structure of the special-shaped structure casting mold as claimed in claim 6, wherein: and second sand collecting grooves (14) are formed in the edges of the first boss (8) and the second boss (9).
9. The positioning structure of the special-shaped structure casting mold as claimed in claim 1, wherein: and a third gap (15) is formed between the upper end of the positioning lock ring (10) and the upper end of the annular groove of the outer die (2).
10. A positioning method for a special-shaped structure casting mold is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
a. firstly, carrying out structural analysis on a casting drawing, determining the modulus of the external mold (2) and the core print quantity of the sand core (3), and respectively manufacturing a positioning bottom plate (1), a core print, a mold split and a positioning lock ring (10);
b. firstly, placing a first core print on a positioning bottom plate (1), embedding positioning rods (4) on outer flanges (7) at two sides of the positioning bottom plate (1), then inserting the upper ends of the positioning rods (4) into holes reserved at the lower ends of split molds, and placing a first split mold;
c. referring to step b, placing a second core print on the first core print, placing a second split mold on the first split mold, and so on until the last core print is placed;
d. and (3) placing a positioning lock ring (10) above the last core print, pre-embedding a positioning rod (4) on the last but one mold parting, then placing the last mold parting, and inserting the upper end of the positioning lock ring (10) into an annular groove preset on the upper bottom surface of the inner cavity of the last mold parting to finish mold assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110270489.4A CN113020546B (en) | 2021-03-12 | 2021-03-12 | Positioning structure and method for special-shaped structure casting mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110270489.4A CN113020546B (en) | 2021-03-12 | 2021-03-12 | Positioning structure and method for special-shaped structure casting mold |
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| CN113020546A true CN113020546A (en) | 2021-06-25 |
| CN113020546B CN113020546B (en) | 2023-02-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113547086A (en) * | 2021-07-08 | 2021-10-26 | 上柴动力海安有限公司 | V-shaped diesel engine matching box sample plate and using method |
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| CN113020546B (en) | 2023-02-28 |
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