CN112317698B - Compressor screw casting mold and casting method thereof - Google Patents
Compressor screw casting mold and casting method thereof Download PDFInfo
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- CN112317698B CN112317698B CN202011080336.5A CN202011080336A CN112317698B CN 112317698 B CN112317698 B CN 112317698B CN 202011080336 A CN202011080336 A CN 202011080336A CN 112317698 B CN112317698 B CN 112317698B
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- screw
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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
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
The invention relates to a compressor screw casting mold and a casting method thereof, and the compressor screw casting mold comprises a base mold supported at the bottom, two shaft rod molds arranged at the upper part of the base mold and a screw mold clamped between the two shaft rod molds, wherein the screw mold comprises a screw core mold and a screw outer mold, a first handle and a plurality of first air holes are respectively arranged on the screw outer mold, and the screw core mold comprises a screw base, a first positioning spigot and a thread mold arranged at the upper part of the screw base; the shaft lever mold comprises a shaft lever core mold and a shaft lever outer mold, a second handle and a plurality of second air holes are respectively formed in the shaft lever outer mold, and the shaft lever core mold comprises a shaft lever base, a second positioning spigot and a shaft lever mold, wherein the second positioning spigot is arranged at the upper part of the shaft lever base; a third positioning spigot and a sand mould hole are respectively arranged on the base mould; the invention has strong practicability and very simple operation, can directly cast the spiral shape of the screw rod part, reduces the processing allowance of the screw rod, improves the production efficiency and reduces the production cost.
Description
Technical Field
The invention relates to a compressor screw casting mold and a casting method thereof, which are applied to the technical field of screw casting equipment.
Background
As is known, a compressor screw generally comprises a screw portion and a shaft portion, and the screw portion is helical, which is difficult to cast directly in the prior art; the production of the screw of the existing compressor adopts the shaft lever to be directly processed into the screw, the machining allowance is large, the loss of a cutter is large, and further the production efficiency is low, which is a main technical problem to be solved in the prior production of the screw, and a casting method capable of directly casting the screw is urgently needed to reduce the machining allowance and the property loss of the screw.
Disclosure of Invention
In order to solve the technical problems, the invention provides a compressor screw casting mold and a casting method thereof, which can directly cast the spiral shape of a screw part, reduce the machining allowance of the screw, improve the production efficiency and reduce the production cost.
The technical scheme of the invention is as follows:
a compressor screw casting mold comprises a base mold supported at the bottom, two shaft rod molds arranged at the upper part of the base mold and a screw mold clamped between the two shaft rod molds, wherein the screw mold comprises a screw core mold and a screw outer mold, a first handle and a plurality of first air holes are respectively arranged on the screw outer mold, and the screw core mold comprises a screw base, a first positioning spigot and a thread mold arranged at the upper part of the screw base; the shaft lever mold comprises a shaft lever core mold and a shaft lever outer mold, a second handle and a plurality of second air holes are respectively formed in the shaft lever outer mold, and the shaft lever core mold comprises a shaft lever base, a second positioning spigot and a shaft lever mold, wherein the second positioning spigot is arranged at the upper part of the shaft lever base; and a third positioning spigot and a sand mould hole are respectively arranged on the base mould.
The screw mandrel comprises a disc-shaped screw base, a first positioning spigot and a first positioning hole are formed in the center of the top face of the screw base, and a threaded die is fixed on the first positioning hole.
The screw rod outer mold is of a cylindrical structure, a circular through hole is formed in the middle of the screw rod outer mold, a plurality of first air holes are uniformly distributed in the side wall surface of the screw rod outer mold, two first handles are symmetrically arranged on two sides of the outer wall surface of the screw rod outer mold, a first convex spigot and a first concave spigot are respectively arranged at the top and the bottom of the screw rod outer mold, and the screw rod outer mold is positioned on a first positioning spigot of the screw rod base through the first concave spigot at the bottom of the screw rod outer mold.
The shaft lever mandrel comprises a disc-shaped shaft lever base, a second positioning spigot and a second positioning hole are formed in the center of the top face of the shaft lever base, and a shaft lever die is fixed on the second positioning hole.
The shaft rod outer die is of a cylindrical structure, a circular through hole is formed in the middle of the shaft rod outer die, a plurality of second air holes are uniformly distributed in the side wall surface of the shaft rod outer die, two second handles are symmetrically arranged on two sides of the outer wall surface of the shaft rod outer die, a second convex spigot and a second concave spigot are respectively arranged at the top and the bottom of the shaft rod outer die, and the shaft rod outer die is positioned on a second positioning spigot of the shaft rod base through the second concave spigot at the bottom of the shaft rod outer die.
The base mould is of a disc-shaped structure, a third positioning spigot is arranged at the center of the top surface of the base mould, and a sand-shaped hole is formed in the center of the top surface of the third positioning spigot.
The first concave spigot of the screw outer die is matched with the second convex spigot of the shaft rod outer die, the first convex spigot of the screw outer die is matched with the second concave spigot of the shaft rod outer die, and the first concave spigot of the screw outer die and the second concave spigot of the shaft rod outer die are matched with the third positioning spigot of the base die.
A method for casting a compressor screw by using the compressor screw casting mold comprises the following specific steps:
s1, manufacturing a screw sand mold: positioning a screw external mold on a first positioning spigot of a screw core mold through a first concave spigot at the bottom of the screw external mold, closing the screw core mold and the screw external mold to form a screw sand cavity, heating the screw mold, adding precoated sand into the screw sand cavity, screwing out the screw external mold after sand mold forming, and covering the sand mold on the screw external mold to obtain a required screw sand mold;
s2: manufacturing a shaft lever sand mold: positioning the outer shaft rod die on a second positioning seam allowance of the outer shaft rod die through a second concave seam allowance at the bottom of the outer shaft rod die, closing the outer shaft rod die and the outer shaft rod die to form a shaft rod sand cavity, heating the shaft rod die, adding precoated sand into the shaft rod sand cavity, screwing out the outer shaft rod die after sand mold forming, and covering the sand mold on the outer shaft rod die to obtain a required shaft rod sand mold;
s3, base sand mold manufacturing: heating the sand mould holes of the base mould, adding the precoated sand into the sand mould holes, and obtaining the required base sand mould after the sand mould is formed;
s4, die assembly: superposing a shaft rod sand mold on a base sand mold, superposing a screw rod sand mold on the shaft rod sand mold, and superposing a shaft rod sand mold above the screw rod sand mold to obtain a casting cavity of a compressor screw rod blank;
s5: pouring: injecting the smelted molten iron into a casting cavity;
s6, cleaning: and after gradually cooling, removing sand and polishing to obtain a compressor screw rod blank casting.
The invention has the following beneficial effects:
1. when the screw rod part and the shaft rod part of the screw rod blank are used, the screw rod part and the shaft rod part are separately subjected to mold design, and the screw rod mold, the shaft rod mold and the base mold are molded and then are assembled and cast, so that the screw shape of the screw rod part is directly manufactured, the operation step of processing the shaft rod into the screw rod by using a cutter in the traditional mode is omitted, the processing allowance of the screw rod is reduced, the production efficiency is effectively improved, and the production cost is greatly reduced.
2. The connecting positions of the screw rod die, the shaft rod die and the base die are respectively positioned by matching the corresponding male spigot, the corresponding female spigot and the corresponding positioning spigot, so that the accuracy of the box closing position is ensured, and the box staggering amount is reduced.
3. The first air hole and the second air hole are respectively formed in the screw outer die and the shaft rod outer die, so that air can be timely discharged during casting, and air holes of a casting are reduced.
4. The first handle and the second handle are respectively arranged on the screw outer die and the shaft rod outer die, so that the stripping operation is facilitated, and the molding qualified rate is effectively improved.
Drawings
FIG. 1 is a front cross-sectional view of a screw blank casting mold of the present invention;
FIG. 2 is a schematic structural view of a screw mold according to the present invention;
FIG. 3 is a schematic structural view of the outer mold of the screw of the present invention;
FIG. 4 is a schematic view showing the structure of the screw core mold of the present invention;
FIG. 5 is a schematic structural view of a shaft rod mold according to the present invention;
FIG. 6 is a schematic structural view of an outer mold for a shaft rod according to the present invention;
fig. 7 is a schematic view of the construction of a spindle mandrel of the present invention;
FIG. 8 is a schematic view of the base mold of the present invention;
FIG. 9 is a schematic view of the screw blank according to the present invention;
the reference numbers in the figures denote:
1. screw rod blanks; 11. a screw section; 12. a shaft portion; 2. a screw mold; 21. a screw mandrel; 22. a screw outer die; 23. a first handle; 24. a first air hole; 25. a first male end; 26. a first female seam allowance; 27. a first positioning spigot; 28. a thread die; 29. a screw base; 3. a shaft rod mold; 31. a shaft mandrel; 32. an outer shaft rod mold; 33. a second handle; 34. a second air hole; 35. a second male end; 36. a second female spigot; 37. a second positioning spigot; 38. a shaft rod mold; 39. a shaft lever base; 4. a base mold; 41. a third positioning spigot; 42. sand molding holes; 5. molding a sand mold by using a screw; 6. shaft lever sand molding; 7. and (5) molding the base.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Referring to fig. 1 to 9, the compressor screw casting mold includes a base mold 4 supported at the bottom, two shaft rod molds 3 disposed at the upper part of the base mold 4, and a screw mold 2 sandwiched between the two shaft rod molds 3, the screw mold 2 includes a screw core mold 21 and a screw outer mold 22, the screw outer mold 22 is respectively provided with a first handle 23 and a plurality of first air holes 24, the screw core mold 21 includes a screw base 29, and a first positioning spigot 27 and a thread mold 28 disposed at the upper part of the screw base 29; the shaft rod mould 3 comprises a shaft rod core mould 31 and a shaft rod outer mould 32, wherein the shaft rod outer mould 32 is respectively provided with a second handle 33 and a plurality of second air holes 34, and the shaft rod core mould 31 comprises a shaft rod base 39, a second positioning spigot 37 arranged at the upper part of the shaft rod base 39 and a shaft rod mould 38; and the base mold 4 is respectively provided with a third positioning spigot 41 and a sand mould hole 42.
The screw mandrel 21 comprises a disc-shaped screw base 29, a first positioning spigot 27 and a first positioning hole are arranged in the center of the top surface of the screw base 29, and a thread die 28 is fixed on the first positioning hole.
The screw outer die 22 is of a cylindrical structure, a circular through hole is formed in the middle of the screw outer die 22, a plurality of first air holes 24 are uniformly distributed in the side wall surface of the screw outer die 22, two first handles 23 are symmetrically arranged on two sides of the outer wall surface of the screw outer die 22, a first convex spigot 25 and a first concave spigot 26 are respectively arranged at the top and the bottom of the screw outer die 22, and the screw outer die 22 is positioned on a first positioning spigot 27 of a screw base 29 through the first concave spigot 26 at the bottom of the screw outer die.
The spindle rod core mold 31 includes a disk-shaped spindle rod base 39, and a second positioning spigot 37 and a second positioning hole are provided in the center of the top surface of the spindle rod base 39, and a spindle rod mold 38 is fixed to the second positioning hole.
The external shaft lever die 32 is of a cylindrical structure, a circular through hole is formed in the middle of the external shaft lever die 32, a plurality of second air holes 34 are uniformly distributed in the side wall surface of the external shaft lever die 32, two second handles 33 are symmetrically arranged on two sides of the external wall surface of the external shaft lever die 32, a second convex spigot 35 and a second concave spigot 36 are respectively arranged at the top and the bottom of the external shaft lever die 32, and the external shaft lever die 32 is positioned on a second positioning spigot 37 of a shaft lever base 39 through the second concave spigot 36 at the bottom of the external shaft lever die 32.
The base mold 4 is of a disc-shaped structure, a third positioning spigot 41 is arranged at the center of the top surface of the base mold 4, and a sand-shaped hole 42 is arranged at the center of the top surface of the third positioning spigot 41.
The first concave spigot 26 of the screw outer die 22 is matched with the second convex spigot 35 of the shaft rod outer die 32, the first convex spigot 25 of the screw outer die 22 is matched with the second concave spigot 36 of the shaft rod outer die 32, and the first concave spigot 26 of the screw outer die 22 and the second concave spigot 36 of the shaft rod outer die 32 are both matched with the third positioning spigot 41 of the base die 4.
A method for casting a compressor screw by using the compressor screw casting mold comprises the following specific steps:
s1, manufacturing a screw sand mold 5: positioning the screw external mold 22 on a first positioning spigot 27 of the screw core mold 21 through a first concave spigot 26 at the bottom of the screw external mold, closing the screw core mold 21 and the screw external mold 22 to form a screw sand cavity, heating the screw mold 2, adding precoated sand into the screw sand cavity, screwing out the screw external mold 22 after sand mold forming, and covering the sand mold on the screw external mold 22 to obtain a required screw sand mold 5;
s2: manufacturing a shaft rod sand mold 6: positioning the shaft rod external mold 32 on a second positioning spigot 37 of the shaft rod core mold 31 through a second concave spigot 36 at the bottom of the shaft rod external mold, closing the shaft rod core mold 31 and the shaft rod external mold 32 to form a shaft rod sand mold cavity, heating the shaft rod mold 3, adding coated sand into the shaft rod sand mold cavity, screwing out the shaft rod external mold 32 after sand mold forming, and coating the sand mold on the shaft rod external mold 32 to obtain a required shaft rod sand mold 6;
s3, manufacturing a base sand mold 7: heating the sand mould holes 42 of the base mould 4, adding the precoated sand into the sand mould holes 42, and obtaining the required base sand mould 7 after the sand mould is formed;
s4, die assembly: superposing the shaft rod sand mold 6 on the base sand mold 7, superposing the screw rod sand mold 5 on the shaft rod sand mold 6, and superposing the shaft rod sand mold 6 above the screw rod sand mold 5 to obtain a casting cavity of the compressor screw rod blank 1;
s5: pouring: injecting the smelted molten iron into a casting cavity;
s6, cleaning: and after gradually cooling, removing sand and polishing to obtain a compressor screw rod blank 1 casting.
The working principle of the invention is as follows:
when the screw rod mold is used, firstly, a screw rod mold 2, a shaft rod mold 3 and a base mold 4 which are matched with the screw rod blank 1 are selected according to the specification of the screw rod blank 1, the screw rod core mold 21 and the screw rod outer mold 22 are further matched to form a screw rod sand cavity, coated sand is added into the screw rod sand cavity after the screw rod mold 2 is heated, the screw rod outer mold 22 is screwed out after sand mold forming is carried out, and the sand mold is coated on the screw rod outer mold 22 to obtain a required screw rod sand mold 5; further forming a shaft rod sand cavity after the shaft rod core mold 31 and the shaft rod outer mold 32 are assembled, heating the shaft rod mold 3, adding coated sand into the shaft rod sand cavity, screwing out the shaft rod outer mold 32 after sand mold forming, and coating the sand mold on the shaft rod outer mold 32 to obtain a required shaft rod sand mold 6; further heating the sand mold holes 42 of the base mold 4, adding the precoated sand into the sand mold holes 42, and obtaining the required base sand mold 7 after the sand mold is formed; then overlapping the shaft rod sand mold 6 on the base sand mold 7, overlapping the screw rod sand mold 5 on the shaft rod sand mold 6, and overlapping a shaft rod sand mold 6 above the screw rod sand mold 5 to obtain a casting cavity of the compressor screw rod blank 1; and further pouring the casting cavity, then performing sand removal and polishing after cooling, obtaining a screw part 11 through the screw mould 2, and obtaining a shaft part 12 through the two shaft rod moulds 3.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.
Claims (5)
1. The utility model provides a compressor screw rod casting mould which characterized in that: the screw rod type screw rod mould comprises a base mould (4) supported at the bottom, two shaft rod moulds (3) arranged at the upper part of the base mould (4) and a screw rod mould (2) clamped between the two shaft rod moulds (3), wherein the screw rod mould (2) comprises a screw rod core mould (21) and a screw rod outer mould (22), a first handle (23) and a plurality of first air holes (24) are respectively arranged on the screw rod outer mould (22), and the screw rod core mould (21) comprises a screw rod base (29), a first positioning spigot (27) and a thread mould (28) which are arranged at the upper part of the screw rod base (29); the shaft rod die (3) comprises a shaft rod core die (31) and a shaft rod outer die (32), wherein a second handle (33) and a plurality of second air holes (34) are respectively formed in the shaft rod outer die (32), and the shaft rod core die (31) comprises a shaft rod base (39), a second positioning spigot (37) arranged on the upper portion of the shaft rod base (39) and a shaft rod die (38); a third positioning spigot (41) and a sand mould hole (42) are respectively arranged on the base mould (4); the shaft rod outer die (32) is of a cylindrical structure, a circular through hole is formed in the middle of the shaft rod outer die (32), a plurality of second air holes (34) are uniformly distributed in the side wall surface of the shaft rod outer die (32), two second handles (33) are symmetrically arranged on two sides of the outer wall surface of the shaft rod outer die (32), a second male spigot (35) and a second female spigot (36) are respectively arranged at the top and the bottom of the shaft rod outer die (32), and the shaft rod outer die (32) is positioned on a second positioning spigot (37) of a shaft rod base (39) through the second female spigot (36) at the bottom of the shaft rod outer die; the base mold (4) is of a disc-shaped structure, a third positioning spigot (41) is arranged at the center of the top surface of the base mold (4), and a sand mold hole (42) is arranged at the center of the top surface of the third positioning spigot (41); the first concave spigot (26) of the screw outer die (22) is matched with the second convex spigot (35) of the shaft rod outer die (32), the first convex spigot (25) of the screw outer die (22) is matched with the second concave spigot (36) of the shaft rod outer die (32), and both the first concave spigot (26) of the screw outer die (22) and the second concave spigot (36) of the shaft rod outer die (32) are matched with the third positioning spigot (41) of the base die (4).
2. The compressor screw casting mold of claim 1, wherein: the screw mandrel (21) comprises a disc-shaped screw base (29), a first positioning spigot (27) and a first positioning hole are formed in the center of the top surface of the screw base (29), and a thread die (28) is fixed on the first positioning hole.
3. The compressor screw casting mold of claim 1, wherein: the screw outer die (22) is of a cylindrical structure, a circular through hole is formed in the middle of the screw outer die (22), a plurality of first air holes (24) are uniformly distributed in the side wall surface of the screw outer die (22), two first handles (23) are symmetrically arranged on two sides of the outer wall surface of the screw outer die (22), a first male spigot (25) and a first female spigot (26) are respectively arranged at the top and the bottom of the screw outer die (22), and the screw outer die (22) is positioned on a first positioning spigot (27) of a screw base (29) through the first female spigot (26) at the bottom of the screw outer die (22).
4. The compressor screw casting mold of claim 1, wherein: the shaft rod core mold (31) comprises a disc-shaped shaft rod base (39), a second positioning spigot (37) and a second positioning hole are formed in the center of the top face of the shaft rod base (39), and a shaft rod mold (38) is fixed on the second positioning hole.
5. A method for casting a compressor screw by using the compressor screw casting mold according to any one of claims 1 to 4, comprising the steps of:
s1: manufacturing a screw sand mold (5): positioning a screw external mold (22) on a first positioning spigot (27) of a screw core mold (21) through a first concave spigot (26) at the bottom of the screw external mold, closing the screw core mold (21) and the screw external mold (22) to form a screw sand cavity, heating the screw mold (2), adding coated sand into the screw sand cavity, unscrewing the screw external mold (22) after sand mold forming, and covering the sand mold on the screw external mold (22) to obtain a required screw sand mold (5);
s2: manufacturing a shaft rod sand mold (6): positioning a shaft rod external mold (32) on a second positioning spigot (37) of a shaft rod core mold (31) through a second concave spigot (36) at the bottom of the shaft rod external mold, closing the shaft rod core mold (31) and the shaft rod external mold (32) to form a shaft rod sand cavity, heating the shaft rod mold (3), adding coated sand into the shaft rod sand cavity, screwing out the shaft rod external mold (32) after sand mold forming, and coating the sand mold on the shaft rod external mold (32) to obtain a required shaft rod sand mold (6);
s3: manufacturing a base sand mold (7): heating the sand mold holes (42) of the base mold (4), adding the precoated sand into the sand mold holes (42), and obtaining the required base sand mold (7) after the sand mold is formed;
s4: and (3) die assembly: superposing the shaft rod sand mold (6) on the base sand mold (7), superposing the screw rod sand mold (5) on the shaft rod sand mold (6), and superposing the shaft rod sand mold (6) above the screw rod sand mold (5) to obtain a casting cavity of the compressor screw rod blank (1);
s5: pouring: injecting the smelted molten iron into a casting cavity;
s6: cleaning: and after gradually cooling, removing sand and polishing to obtain a compressor screw rod blank (1) casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011080336.5A CN112317698B (en) | 2020-10-10 | 2020-10-10 | Compressor screw casting mold and casting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011080336.5A CN112317698B (en) | 2020-10-10 | 2020-10-10 | Compressor screw casting mold and casting method thereof |
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| CN112317698A CN112317698A (en) | 2021-02-05 |
| CN112317698B true CN112317698B (en) | 2023-04-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3410798B2 (en) * | 1994-03-11 | 2003-05-26 | 株式会社センシュー | Mold and casting method using this mold |
| JP3830462B2 (en) * | 2003-05-28 | 2006-10-04 | 株式会社日立産機システム | Method for casting screw rotor of compressor |
| JP5139453B2 (en) * | 2010-01-19 | 2013-02-06 | 株式会社栗本鐵工所 | Hollow screw shaft and manufacturing method thereof |
| CN201862734U (en) * | 2010-11-25 | 2011-06-15 | 河南省中原内配股份有限公司 | Fast sand mould forming mold for centrifugal casting special-shaped cylinder jacket |
| JP5839582B2 (en) * | 2011-09-27 | 2016-01-06 | 株式会社神戸製鋼所 | Mold design method and mold |
| CN103406495B (en) * | 2013-07-31 | 2015-10-28 | 西安交通大学 | A kind of screw rotor of single-screw compressor casting method |
| CN105170915B (en) * | 2015-10-20 | 2017-06-13 | 陆亚明 | The preparation method of air compressor machine screw rod |
| CN107309394B (en) * | 2017-08-23 | 2019-10-29 | 湖南财经工业职业技术学院 | Long cylinder ironcasting casting die and casting method of the inner cavity with muscle |
| CN110102722B (en) * | 2019-05-13 | 2020-11-03 | 和县华顺铸造有限公司 | Three-box sand mold for metal casting |
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