CN114951554A - Casting mold system for male and female rotors of air compressor - Google Patents
Casting mold system for male and female rotors of air compressor Download PDFInfo
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- CN114951554A CN114951554A CN202210636312.6A CN202210636312A CN114951554A CN 114951554 A CN114951554 A CN 114951554A CN 202210636312 A CN202210636312 A CN 202210636312A CN 114951554 A CN114951554 A CN 114951554A
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- 238000005266 casting Methods 0.000 title claims description 36
- 230000000712 assembly Effects 0.000 claims abstract description 29
- 238000000429 assembly Methods 0.000 claims abstract description 29
- 238000000465 moulding Methods 0.000 claims description 39
- 230000013011 mating Effects 0.000 claims description 27
- 239000000306 component Substances 0.000 claims description 13
- 239000008358 core component Substances 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 10
- 238000007493 shaping process Methods 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 12
- 229910052742 iron Inorganic materials 0.000 description 8
- 239000004576 sand Substances 0.000 description 8
- 238000003754 machining Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011081 inoculation Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 244000035744 Hura crepitans Species 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
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- 238000005498 polishing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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- 238000007528 sand casting Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/086—Filters
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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
- B22C9/103—Multipart cores
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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
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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
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a pouring die system for a male rotor and a female rotor of an air compressor, which comprises a pouring cup, a sprue, a model assembly and an exhaust assembly which are connected in sequence; the model component comprises a short shaft cavity, a main body cavity and a long shaft cavity which are connected in sequence; the main body cavity also comprises a left sand core assembly, a plurality of middle sand core assemblies and a right sand core assembly which are sequentially connected; the left sand core assembly, the middle sand core assembly and the right sand core assembly are clamped and positioned through a plurality of forming parts arranged on the left sand core assembly, the middle sand core assembly and the right sand core assembly, and an outer forming surface of the air compressor rotor is formed. The upper middle forming part and the lower middle forming part of the middle sand core assembly are fixed together in a staggered mode to form a stepped surface, the circular frame and the inclined plane form a clamping positioning part, and when the stepped surface is matched with the adjacent sand core assemblies, positioning among the left sand core assembly, the plurality of middle sand core assemblies and the right sand core assembly can be greatly facilitated, so that assembly is facilitated.
Description
Technical Field
The invention belongs to the technical field of casting metal molds, and particularly relates to a casting mold system for male and female rotors of an air compressor.
Background
The male and female rotors are one of the most important parts on the air compressor, and play an important role in power transmission of the whole air compressor, so that the manufacturing requirement is high, and the male and female rotors belong to the class A parts of the air compressor. The requirement of the casting blank is higher than the national standard: the casting defect is not allowed in the casting, the hardness of the casting body is 190 plus 270HBS, the tensile strength of the body is more than or equal to 600Mpa, the yield strength is more than or equal to 370Mpa, the elongation is more than or equal to 3 percent, and the spheroidization rate of the graphite form is more than or equal to 85 percent.
In patent document CN101342585A, a "method for casting and molding a compressor screw rotor" is disclosed, in which a sand mold having a screw cavity is prepared by a first mold, and then the sand mold is placed in a drag flask of a second mold, and a cope flask of the second mold has a mold cavity having a first pivot portion and a second pivot portion, and casting and molding are performed after mold closing. The casting method adopts the traditional mold sand casting method, the appearance of the cast product is rough, the metallographic structure of the internal matrix is unstable, the interior of the casting body is shrunk and loosened, the requirements of a male rotor and a female rotor cannot be met, the production efficiency is low, the machining allowance is large, and the rejection rate of the casting is high.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a pouring mold system for a male and female rotor of an air compressor, which is used for solving the problems of low production efficiency, large machining allowance and high rejection rate of castings of the male and female rotors of the air compressor.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: comprises a pouring cup, a sprue, a model component and an exhaust component which are connected in sequence; the mold component comprises a short shaft cavity, a main body cavity and a long shaft cavity which are connected in sequence, the short shaft cavity is connected with the sprue, and the long shaft cavity is connected with the exhaust component; the main body cavity also comprises a left sand core assembly, a plurality of middle sand core assemblies and a right sand core assembly which are sequentially connected; the left sand core assembly, the middle sand core assembly and the right sand core assembly are clamped and positioned through a plurality of forming parts arranged on the left sand core assembly, the middle sand core assembly and the right sand core assembly, and an outer forming surface of the air compressor rotor is formed.
Furthermore, the left sand core assembly comprises a left circular frame and a plurality of left forming parts fixed on the left circular frame, each left forming part comprises a left lower bottom surface flush with the bottom surface of the left circular frame, a left upper bottom surface matched with the middle sand core assembly, and a left forming part mounting curved surface, a left mounting and positioning inclined surface, a left spiral protrusion forming curved surface and a left matching and connecting plane which are arranged between the left lower bottom surface and the left upper bottom surface and are sequentially connected; the left side forming part is provided with a curved surface which is fixedly arranged on the inner side of the left side circular ring frame, and the left side mounting and positioning inclined plane and the left side matching and connecting plane are matched with the middle sand core component; the height value of the left side circular ring frame is half of the height value of the left side forming part; the middle sand core assembly comprises a middle circular ring frame, a plurality of middle upper forming parts and a plurality of middle lower forming parts, wherein the middle upper forming parts and the corresponding middle lower forming parts are fixedly connected through bottom surfaces; the middle upper forming part is the same as the left forming part.
Further, the middle lower forming part comprises a middle lower forming part lower bottom surface, a middle lower forming upper bottom surface matched with the middle sand core assembly, and a middle lower matching connection plane, a middle lower spiral protrusion forming curved surface, a middle lower installation positioning inclined surface and a middle lower forming part installation curved surface which are arranged between the middle lower forming part lower bottom surface and the middle lower forming part upper bottom surface and are sequentially connected; the middle lower forming part is fixedly connected with the inner side of the middle circular frame by a mounting curved surface; the middle lower matching and connecting plane is matched with the left matching and connecting plane or the middle matching and connecting plane in the adjacent middle sand core assembly; the middle upper forming part comprises a middle upper forming part lower bottom surface, a middle upper forming part upper bottom surface, a middle upper matching connecting plane, a middle upper spiral protrusion forming curved surface, a middle upper mounting positioning inclined surface and a middle upper forming part mounting curved surface, and the middle upper forming part mounting curved surface is fixedly connected with the inner side of the middle ring frame.
Furthermore, the right sand core assembly comprises a right circular frame and a plurality of right forming parts fixed on the right circular frame; the right forming part comprises a right lower bottom surface flush with the bottom surface of the right circular frame, a right upper bottom surface matched with the middle sand core assembly, and a right forming part mounting curved surface, a right mounting and positioning inclined surface, a right spiral protrusion forming curved surface and a right matching and connecting plane which are arranged between the right lower bottom surface and the right upper bottom surface and are sequentially connected, the right forming part mounting curved surface is mounted and fixed on the inner side of the right circular frame, and the right mounting and positioning inclined surface and the right matching and connecting plane are matched with the middle sand core assembly; the height value of the right circular ring frame is half of the height value of the right forming part.
Furthermore, left side cooperation connecting plane, middle part are gone up cooperation connecting plane, middle part cooperation connecting plane and right side cooperation connecting plane down and are the heliciform after connecting, and left side cooperation connecting plane, middle part are gone up cooperation connecting plane, middle part and are cooperated connecting plane and right side cooperation connecting plane's inclination and the lead angle of air compressor machine rotor are the same down.
Furthermore, a first transitional connecting surface is arranged between the spiral protrusion forming curved surface on the left sand core component and the matching connecting plane; the middle part is matched with the connecting plane, and a first bending part is arranged at the connecting part of the middle part and the spiral protrusion forming curved surface; the bent part at the inner side of the bent part is wrapped with a first transition connecting surface, and the shape of the bent part at the outer side of the first bent part is matched with the spiral groove of the air compressor rotor; a second transitional connecting surface is arranged between the middle part matching connecting plane and the middle part upper spiral protrusion forming curved surface; the right matching connection plane is also provided with a second bending part at the connection part of the right spiral protrusion forming curved surface; the second transition connecting surface is wrapped at the bent part at the inner side of the bent part, and the shape of the bent part at the outer side of the second bent part is adapted to the spiral groove of the air compressor rotor.
Furthermore, the height values of the left side circular frame and the right side circular frame are the same, and the height value of the left side circular frame is half of the height value of the middle circular frame.
Further, the left forming part, the right forming part, the middle lower forming part and the middle upper forming part have the same height value.
Furthermore, a plurality of positioning columns and a plurality of positioning holes matched with the positioning columns are respectively arranged between the left sand core assembly and the middle sand core assembly, between the adjacent middle sand core assemblies and between the middle sand core assembly and the right sand core assembly, and the positioning columns are arranged on the circular ring frame.
Furthermore, ceramic filter screens are respectively arranged between the sprue cup and the direct current channel and between the direct current channel and the front end of the short shaft cavity.
According to the technical scheme, the invention has the following advantages: the middle sand core assembly comprises a middle circular frame, a plurality of middle upper forming parts and a plurality of middle lower forming parts, wherein the middle upper forming parts and the middle lower forming parts are fixed on the middle circular frame, the corresponding middle upper forming parts and the corresponding middle lower forming parts are staggered and fixed together to form a step surface, the circular frame and the inclined surface form a clamping positioning part, and when the step surface is matched with the adjacent sand core assemblies, the positioning and the assembly among the left sand core assembly, the plurality of middle sand core assemblies and the right sand core assembly can be facilitated.
According to the invention, the main body cavity for forming the male and female rotors of the air compressor is divided into the left sand core assembly, the plurality of middle sand core assemblies and the right sand core assembly, each sand core assembly comprises the forming part and the circular frame, self-positioning between the sand core assemblies is realized through matching of adjacent forming parts, the efficiency of sand core assembly is improved, meanwhile, the outer curve part of the male and female rotors of the air compressor is formed by combining the two adjacent forming parts, and burrs and barbs after the main body cavity is manufactured are transferred to the outer curve of the male and female rotors of the air compressor, so that the subsequent processing of the male and female rotors of the air compressor is easier.
Compared with the mode that the main cavity forming the male and female rotors of the air compressor is divided into a left-right symmetrical cavity or an equal-section cavity in the axis direction, the invention has remarkable advantages; compared with a mode of dividing the air compressor male and female rotors into two parts of cavities which are symmetrical left and right, the manufacturing accuracy of the air compressor male and female rotors is dispersed to each sand core assembly, the accuracy of each sand core assembly is easier to control, and therefore the accuracy of the air compressor male and female rotors is improved; secondly, compared with a chamber divided into equal sections in the axis direction, the self-positioning structure can utilize the forming part between the adjacent sand core components to form self-positioning, is convenient for installing the whole main body cavity when the sand core components are produced and manufactured, and avoids the problem that the positioning between the adjacent sand core components is inaccurate, so that the manufacturing precision of the male and female rotors of the air compressor is low.
According to the invention, the left sand core assembly, the plurality of middle sand core assemblies and the right sand core assembly form the main body cavity of the male and female rotors of the air compressor, and the middle sand core assemblies are completely the same, so that the number of the middle sand core assemblies is controlled, the forming length of the male and female rotors of the integral air compressor is controlled, the model assembly provided by the invention can be suitable for the casting requirements of the male and female rotors of the air compressor with different lengths, the number of the molds is reduced, and the production and manufacturing cost is reduced.
The left sand core assembly, the plurality of middle sand core assemblies and the right sand core assembly directly form the external spiral structure of the compressor male and female rotors, so that the machining allowance of the product is greatly reduced, the machining efficiency and the qualification rate of the finished product of the product are improved, and the machining allowance of the casting can be stabilized within 2 mm.
Drawings
FIG. 1 is an expanded plan view of a casting mold system;
FIG. 2 is a schematic view of a casting runner of the casting mold system;
FIG. 3 is a first schematic view of the outer shape of the mold assembly;
FIG. 4 is a second schematic diagram of the outer shape of the mold assembly;
FIG. 5 is a schematic diagram of the configuration of the left sand core assembly;
FIG. 6 is a schematic view of the contour structure of the left sand core assembly in the other direction
FIG. 7 is a schematic view of the profile configuration of the center core assembly;
FIG. 8 is a schematic view of the profile configuration of the sand core assembly in the other direction;
FIG. 9 is a schematic view of the configuration of the right sand core assembly;
fig. 10 is a schematic view of the configuration of the right-side core assembly in another direction.
The main part symbols in the figures are explained as follows:
1. a pouring cup; 2. a sprue; 3. a model component; 4. a ceramic filter screen; 5. an exhaust assembly; 6. casting a sand box by using a mould;
7. a left sand core assembly; 71. a left circular frame; 72 left molding part; 721. a left lower bottom surface; 722. a left upper bottom surface; 723. the left forming part is provided with a curved surface; 724. a positioning inclined plane is arranged on the left side; 725. the left spiral bulge forms a curved surface; 726. the left side is matched with the connecting plane; 727. a first transitional connecting surface;
8. a right sand core assembly; 81. a right circular frame; 82. a right-side forming part; 821. a right lower bottom surface; 822. the right side is the upper bottom surface; 823. the right forming part is provided with a curved surface; 824. a positioning inclined plane is arranged on the right side; 825. the right spiral bulge forms a curved surface; 826. the right side is matched with the connecting plane; 827. a second bent portion;
9. a middle sand core assembly; 91. a middle circular frame;
93. a middle upper forming part; 931. the middle part is provided with an upper forming part and a lower bottom surface; 932. an upper bottom surface of the middle upper forming part; 933. the middle upper forming part is provided with a curved surface; 934. a positioning inclined plane is arranged on the middle part; 935. the middle part is spirally raised to form a curved surface; 936. the middle part is matched with a connecting plane; 937. a second transitional connecting surface;
92. a middle lower molding section; 921. a lower bottom surface of the middle lower molding part; 922. the upper bottom surface of the middle lower forming part; 923. the middle lower forming part is provided with a curved surface; 924. a positioning inclined plane is arranged below the middle part; 925. the middle lower spiral bulge forms a curved surface; 926. the middle part is matched with the connecting plane; 927. a first bending part.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1 and 2, the casting mold system of the male and female rotors of the air compressor comprises a pouring cup 1, a sprue 2, a model component 3 and an exhaust component 5 which are connected in sequence; the model component 3 comprises a short shaft cavity, a main body cavity and a long shaft cavity which are connected in sequence, the short shaft cavity is connected with the sprue 2, and the long shaft cavity is connected with the exhaust component 5. The pouring cup, the straight runner and the inlet side of the short shaft cavity adopt a cylindrical or conical frustum structure, the whole pouring cup of the die is inclined by 3-5 degrees and is used for supplying metal when a casting is formed, shrinkage cavity, shrinkage porosity and slag collection are prevented, the casting is fed, and the product quality is improved. The pouring cup is not overlapped with the axis of the direct current channel, a certain height is reserved between the bottom of the direct current channel and the inner pouring gate, molten iron cannot enter a product cavity instantly during pouring, the flow rate of the molten iron can be reduced, the molten iron is more stable, the molten iron is prevented from entering the cavity and splashing, and the product quality is improved.
As shown in fig. 3 and 4, the main body cavity further comprises a left sand core assembly 7, a plurality of middle sand core assemblies 9 and a right sand core assembly 8 which are connected in sequence; clamping and positioning are formed among the left sand core assembly 7, the middle sand core assembly 9 and the right sand core assembly 8 through a plurality of forming parts arranged, and external forming surfaces of the male and female rotors of the air compressor are formed. The molding parts on the adjacent sand core assemblies can play a self-positioning role in mutual positioning while the molding parts form the external molding surfaces of the male and female rotors of the air compressor. The whole outsides of the left sand core component 7, the plurality of middle sand core components 9 and the right sand core component 8 are cylindrical. The left sand core assembly 7, the plurality of middle sand core assemblies 9 and the right sand core assembly 8 form a main body cavity of the male and female rotors of the air compressor, the middle sand core assemblies 9 are completely the same, so that the number of the middle sand core assemblies 8 is controlled, and the forming length of the male and female rotors of the integral air compressor is controlled. Each sand core component is including shaping portion and ring frame, through the cooperation between each other of adjacent shaping portion, realize the self-align between each sand core component, efficiency when improving the equipment psammitolite, the outside curve part of air compressor machine negative and positive rotor forms by the combination of two adjacent shaping portions simultaneously, shift burr and the barb after making the main part die cavity to the outside curve of air compressor machine negative and positive rotor on, make the follow-up processing of air compressor machine negative and positive rotor easier.
According to the invention, the left sand core assembly 7, the plurality of middle sand core assemblies 9 and the right sand core assembly 8 form the main body cavity of the male and female rotors of the air compressor, and the middle sand core assemblies 9 are completely the same, so that the number of the middle sand core assemblies 9 is controlled, the forming length of the male and female rotors of the integral air compressor is controlled, the model assembly disclosed by the invention can be suitable for the casting requirements of the male and female rotors of the air compressor with different lengths, the number of moulds is reduced, and the production and manufacturing cost is reduced.
As shown in fig. 5 and 6, the left sand core assembly 7 comprises a left circular frame 71 and a plurality of left forming parts 72 fixed on the left circular frame 71, wherein each left forming part 72 comprises a left lower bottom surface 721 flush with the bottom surface of the left circular frame 71, a left upper bottom surface 722 matched with the middle sand core assembly 9, and a left forming part mounting curved surface 723, a left mounting and positioning inclined surface 724, a left spiral protrusion forming curved surface 725 and a left matching and connecting plane 726 which are arranged between the left lower bottom surface 721 and the left upper bottom surface 722 and are sequentially connected; the left forming part mounting curved surface 723 is fixedly mounted on the inner side of the left circular ring frame 71, and the left mounting positioning inclined surface 724 and the left matching connecting plane 726 are matched with the middle sand core assembly 9; the height of the left circular frame 71 is half of the height of the left forming portion 72.
As shown in fig. 7 and 8, the middle sand core assembly 9 includes a middle circular frame 91, a plurality of middle upper forming portions 93 and a plurality of middle lower forming portions 92 fixed in the middle circular frame 91, the middle upper forming portions 93 and the corresponding middle lower forming portions 92 are fixedly connected through bottom surfaces, the middle upper forming portions 93 and the corresponding middle lower forming portions 92 are staggered from each other, and right-angled stepped surfaces for installing the left sand core assembly 7, the adjacent middle sand core assembly 9 and the right sand core assembly 8 are formed at the upper and lower sides. The middle upper forming part 93 and the middle lower forming part 92 are staggered and fixed together to form a stepped surface, the stepped surface, a circular frame and an inclined plane form a clamping positioning part, and when the stepped surface is matched with an adjacent sand core assembly, positioning and assembling among the left sand core assembly 7, the plurality of middle sand core assemblies 9 and the right sand core assembly 8 can be facilitated. Taking the upper surface of the middle upper forming portion 93 as an example, the right-angled stepped surface includes a middle upper forming portion upper bottom surface 932, a middle upper mating connection plane 936, and a middle lower forming portion lower bottom surface 921, which is similar to the upper surface of the middle lower forming portion 92.
Wherein the middle upper molding 93 is identical to the left molding 72. The middle upper forming part 93 comprises a middle upper forming part lower bottom surface 931, a middle upper forming part upper bottom surface 932, a middle upper matching connection plane 936, a middle upper spiral protrusion forming curved surface 935, a middle upper mounting and positioning inclined surface 934 and a middle upper forming part mounting curved surface 933, and the middle upper forming part mounting curved surface 933 is fixedly connected with the inner side of the middle circular frame 91.
The middle lower molding part 92 comprises a middle lower molding part lower bottom surface 921, a middle lower molding upper bottom surface 922 matched with the middle sand core assembly 9, and a middle lower matching connection plane 926, a middle lower spiral protrusion molding curved surface 925, a middle lower mounting and positioning inclined surface 924 and a middle lower molding part mounting curved surface 923 which are arranged between the middle lower molding part lower bottom surface 921 and the middle lower molding part upper bottom surface 922 and are sequentially connected; the middle lower forming part mounting curved surface 923 is fixedly connected with the inner side of the middle annular frame 91; the lower central mating connection plane 926 mates with the left mating connection plane 726 or the central mating connection plane 926 in the adjacent central sand core assembly 9.
As shown in fig. 9 and 10, the right sand core assembly 8 comprises a right circular ring frame 81 and a plurality of right forming parts 82 fixed on the right circular ring frame 81; the right forming part 82 comprises a right lower bottom surface 821 flush with the bottom surface of the right circular ring frame 81, a right upper bottom surface 822 matched with the middle sand core assembly 9, and a right forming part installation curved surface 823, a right installation positioning inclined surface 824, a right spiral protrusion forming curved surface 825 and a right matching connection plane 826 which are arranged between the right lower bottom surface 821 and the right upper bottom surface 822 and are sequentially connected, the right forming part installation curved surface 823 is installed and fixed on the inner side of the right circular ring frame 81, and the right installation positioning inclined surface 824 and the right matching connection plane 826 are matched with the middle sand core assembly 9; the height of the right circular frame 81 is half of the height of the right forming portion 82.
In this embodiment, the left mating connection plane 726, the middle upper mating connection plane 936, the middle lower mating connection plane 926, and the right mating connection plane 826 are connected in a spiral shape, and the inclination angles of the left mating connection plane 726, the middle upper mating connection plane 936, the middle lower mating connection plane 926, and the right mating connection plane 826 are the same as the lift angle of the air compressor rotor.
In this embodiment, a first transitional connecting surface 727 is provided between the spiral protrusion forming curved surface 725 and the mating connecting plane 726 on the left sand core assembly 7; a first bent part 927 is arranged at the joint of the middle part matching connection plane 926 and the middle part spiral protrusion forming curved surface 925; the first transition connecting surface 727 is wrapped at the bent part at the inner side of the bent part, and the shape of the bent part at the outer side of the first bent part 927 is matched with the spiral groove of the air compressor rotor; a second transitional connecting surface 937 is arranged between the middle upper matching connecting plane 936 and the middle upper spiral protrusion forming curved surface 935; the right mating connection plane 826 is also provided with a second bent portion 827 at the connection with the right spiral protrusion forming curved surface 825; the second transition connecting surface 927 is wrapped up in the inboard bending department of kink, and the shape of the outside bending department of second kink 827 suits with the spiral groove of air compressor machine rotor.
In this embodiment, the height values of the left circular frame 71 and the right circular frame 81 are the same, and the height value of the left circular frame 71 is half of the height value of the middle circular frame 91.
In this embodiment, the left side molding part 72, the right side molding part 80, the middle lower molding part 92 and the middle upper molding part 93 have the same height.
In this embodiment, a plurality of positioning columns and a plurality of positioning holes matched with the positioning columns are respectively arranged between the left sand core assembly 7 and the middle sand core assembly 9, between the adjacent middle sand core assemblies 9 and between the middle sand core assembly 9 and the right sand core assembly 8, and the positioning columns are arranged on the circular frame.
In the present embodiment, ceramic screens 4 are respectively provided between the pouring cup 1 and the straight flow channel 2, and between the straight flow channel 2 and the front end of the short shaft cavity. The ceramic filter screen 4 that sets up between pouring basin 1 and direct current way 2 can once filter the product, prevents that the inclusion in the molten iron from getting into the product die cavity, and the ceramic filter screen 4 that sets up between the front end of direct current way 1 and minor axis die cavity is used for once more filtering, gets rid of the impurity of molten metal, appears shrinkage cavity and shrinkage porosity when preventing to form the foundry goods.
Compared with the mode that the main cavity forming the male and female rotors of the air compressor is divided into a left-right symmetrical cavity or an equal-section cavity in the axis direction, the invention has remarkable advantages; compared with a mode of dividing the air compressor male and female rotors into two parts of cavities which are symmetrical left and right, the manufacturing accuracy of the air compressor male and female rotors is dispersed to each sand core assembly, the accuracy of each sand core assembly is easier to control, and therefore the accuracy of the air compressor male and female rotors is improved; and secondly, compared with a chamber divided into equal sections in the axis direction, the self-positioning structure can utilize the forming part between the adjacent sand core assemblies to form self-positioning, is convenient for installing the whole main body cavity while being convenient for producing and manufacturing the sand core assemblies, and avoids the problem that the manufacturing precision of the male and female rotors of the air compressor is low due to inaccurate positioning between the adjacent sand core assemblies.
The casting method of the female and male rotors pouring mould system by utilizing the air compressor comprises the following steps;
s1: making sand cores
The left sand core assembly 7, the right sand core assembly 8 and the middle sand core assembly 9 are manufactured by adopting a mold and resin, then the cores are assembled in a positioning mode through forming parts on the left sand core assembly 7, the right sand core assembly 8 and the middle sand core assembly 9, and the lengths of a male rotor and a female rotor of an air compressor can be indirectly controlled by adjusting the number of the middle sand core assemblies 9, wherein the sand shooting pressure is 1-3kg/cm2, the sand shooting time is 0.2s, and the mold temperature is 160-.
S2: mold shell
Adopting a mold and resin sand for molding, adopting sand shooting pressure of 3-7kg/cm2, sand shooting time of 0.6s and mold temperature of 170-.
S3: die assembly
And (3) placing the combined sand core in a shell mold, placing a ceramic filter screen at a pouring cup, beating glue on the plane of the shell mold, performing mold assembly through a positioning hole, and pressing the shell to complete mold assembly.
S4: preparation before casting
Preparing furnace burden, smelting, and then performing C, Si analysis and inoculation treatment, wherein the temperature of molten iron for smelting is 1550 +/-20 ℃; C. in Si analysis, the C content is controlled to be 3.55-3.7%, the Si content is controlled to be 1.9-2.4%, the Mn content is less than or equal to 0.06%, the P content is less than or equal to 0.06%, the S content is less than or equal to 0.02%, and the mg content is controlled to be 0.03-0.065; 0.9% of 75 ferrosilicon is inoculated;
s5: pouring
Pouring molten iron into the mold, wherein the pouring temperature is 1360-1420 ℃, the pouring time is 10 +/-2 seconds per mold, and stream-following secondary inoculation is adopted during pouring, and the amount of the molten iron is 4-5 g/s;
s6: pouring, unpacking and shot blasting
The unpacking and heat preservation time is more than or equal to 4H;
s7: and carrying out post-treatment such as pouring polishing, cleaning and the like to obtain a casting product.
Claims (10)
1. The utility model provides a mould system of pouring of negative and positive rotors of air compressor machine which characterized in that: comprises a pouring cup (1), a sprue (2), a model component (3) and an exhaust component (5) which are connected in sequence;
the mould component (3) comprises a short shaft cavity, a main body cavity and a long shaft cavity which are sequentially connected, the short shaft cavity is connected with the sprue (2), and the long shaft cavity is connected with the exhaust component (5);
the main body cavity also comprises a left sand core assembly (7), a plurality of middle sand core assemblies (9) and a right sand core assembly (8) which are sequentially connected; and the left sand core assembly (7), the middle sand core assembly (9) and the right sand core assembly (8) are clamped and positioned through a plurality of forming parts arranged on the left sand core assembly, the middle sand core assembly and the right sand core assembly, and an external forming surface of the air compressor rotor is formed.
2. The casting mold system for the male and female rotors of the air compressor as claimed in claim 1, wherein the left sand core assembly (7) comprises a left circular frame (71) and a plurality of left molding parts (72) fixed on the left circular frame (71), the left molding part (72) comprises a left lower bottom surface (721) flush with the bottom surface of the left circular frame (71), a left upper bottom surface (722) matched with the middle sand core assembly (9), and a left molding part installation curved surface (723), a left installation positioning inclined surface (724), a left spiral protrusion molding curved surface (725) and a left matching connection plane (726) which are arranged between the left lower bottom surface (721) and the left upper bottom surface (722) and are sequentially connected;
the left side forming part mounting curved surface (723) is fixedly mounted on the inner side of the left side circular ring frame (71), and the left side mounting positioning inclined surface (724) is matched with the left side matching connecting plane (726) to be matched with the middle sand core assembly (9); the height value of the left circular frame (71) is half of the height value of the left forming part (72);
the middle sand core assembly (9) comprises a middle circular ring frame (91), a plurality of middle upper forming parts (93) and a plurality of middle lower forming parts (92), wherein the middle upper forming parts (93) and the corresponding middle lower forming parts (92) are fixed in the middle circular ring frame (91) through bottom surfaces, the middle upper forming parts (93) and the corresponding bottom surfaces of the middle lower forming parts (92) are mutually staggered, and right-angled stepped surfaces for mounting the left sand core assembly (7), the adjacent middle sand core assembly (9) and the right sand core assembly (8) are formed at the upper side and the lower side; the middle upper molding part (93) is the same as the left molding part (72).
3. The casting mold system for the male and female rotors of the air compressor as claimed in claim 1, wherein the middle lower molding part (92) comprises a middle lower molding part lower bottom surface (921), a middle lower molding upper bottom surface (922) engaged with the middle sand core assembly (9), and a middle lower mating connection plane (926), a middle lower spiral protrusion molding curved surface (925), a middle lower mounting positioning inclined surface (924) and a middle lower molding part mounting curved surface (923) which are arranged between the middle lower molding part lower bottom surface (921) and the middle lower molding part upper bottom surface (922) and are sequentially connected;
the middle lower forming part mounting curved surface (923) is fixedly connected with the inner side of the middle circular ring frame (91); said middle lower mating connection plane (926) mates with said left mating connection plane (726) or said middle mating connection plane (926) in the adjacent middle sand core assembly (9);
shaping portion (93) on the middle part including shaping portion lower floor (931) on the middle part, shaping portion upper floor (932) on the middle part, cooperation connection plane (936) on the middle part, spiral protrusion shaping curved surface (935) on the middle part and installation positioning inclined plane (934) on the middle part and shaping portion installation curved surface (933) on the middle part, shaping portion installation curved surface (933) on the middle part with the inboard fixed connection of middle part ring frame (91).
4. The casting mold system for the male and female rotors of the air compressor as claimed in claim 3, wherein the right sand core assembly (8) comprises a right circular frame (81) and a plurality of right forming parts (82) fixed on the right circular frame (81); the right side forming part (82) comprises a right side lower bottom surface (821) flush with the bottom surface of the right side circular ring frame (81), a right side upper bottom surface (822) matched with the middle sand core component (9), and a right side forming part mounting curved surface (823), a right side mounting and positioning inclined surface (824), a right side spiral protrusion forming curved surface (825) and a right side matching and connecting plane (826) which are arranged between the right side lower bottom surface (821) and the right side upper bottom surface (822) and are sequentially connected, wherein the right side forming part mounting curved surface (823) is fixedly mounted on the inner side of the right side circular ring frame (81), and the right side mounting and positioning inclined surface (824) and the right side matching and connecting plane (826) are matched with the middle sand core component (9); the height value of the right circular frame (81) is half of the height value of the right forming part (82).
5. The casting mold system for male and female rotors of air compressor according to claim 4, wherein the left mating connection plane (726), the middle upper mating connection plane (936), the middle lower mating connection plane (926) and the right mating connection plane (826) are connected to form a spiral shape, and the inclination angles of the left mating connection plane (726), the middle upper mating connection plane (936), the middle lower mating connection plane (926) and the right mating connection plane (826) are the same as the lift angle of the rotor of the air compressor.
6. The casting mold system for male and female rotors of air compressor as claimed in claim 4, wherein a first transitional connecting surface (727) is provided between said spiral protrusion forming curved surface (725) on said left sand core assembly (7) and said mating connecting plane (726); a first bending part (927) is arranged at the joint of the middle part matching connection plane (926) and the middle part spiral protrusion forming curved surface (925); the first transition connecting surface (727) is wrapped at the bent part at the inner side of the bent part, and the shape of the bent part at the outer side of the first bent part (927) is adapted to the spiral groove of the air compressor rotor; a second transitional connecting surface (937) is arranged between the middle upper matching connecting plane (936) and the middle upper spiral protrusion forming curved surface (935); the right matching connection plane (826) is also provided with a second bending part (827) at the connection part of the right spiral protrusion forming curved surface (825); the second transition connecting surface (927) is wrapped up in the inboard bending department of kink, the shape of the outside bending department of second bending portion (827) suits with the spiral groove of air compressor machine rotor.
7. The casting mold system for the male and female rotors of the air compressor as claimed in claim 2, wherein the height values of said left circular frame (71) and said right circular frame (81) are the same, and the height value of said left circular frame (71) is half of the height value of said middle circular frame (91).
8. The casting mold system for the male and female rotors of the air compressor according to claim 2, wherein the left molding portion (72), the right molding portion (80), the middle lower molding portion (92) and the middle upper molding portion (93) have the same height value.
9. The casting mold system for the male and female rotors of the air compressor as claimed in claim 1, wherein a plurality of positioning columns and a plurality of positioning holes matched with the positioning columns are respectively arranged between the left sand core assembly (7) and the middle sand core assembly (9), between the adjacent middle sand core assemblies (9) and between the middle sand core assembly (9) and the right sand core assembly (8), and the positioning columns are arranged on the circular frame.
10. The casting mold system for the male and female rotors of the air compressor according to claim 1, wherein a ceramic filter screen (4) is respectively arranged between the sprue cup (1) and the straight runner (2) and between the straight runner (2) and the front end of the short shaft cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210636312.6A CN114951554A (en) | 2022-06-07 | 2022-06-07 | Casting mold system for male and female rotors of air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210636312.6A CN114951554A (en) | 2022-06-07 | 2022-06-07 | Casting mold system for male and female rotors of air compressor |
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| Publication Number | Publication Date |
|---|---|
| CN114951554A true CN114951554A (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210636312.6A Pending CN114951554A (en) | 2022-06-07 | 2022-06-07 | Casting mold system for male and female rotors of air compressor |
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| CN (1) | CN114951554A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0061947A1 (en) * | 1981-03-13 | 1982-10-06 | Ets. POMPES GUINARD Société dite: | Rotor, means and method of making the same by moulding |
| TWI272147B (en) * | 2005-09-14 | 2007-02-01 | Fu Sheng Ind Co Ltd | Method for manufacturing spiral rotator of compressor |
| CN203343368U (en) * | 2013-07-19 | 2013-12-18 | 浙江汉声精密机械有限公司 | Spiral rotor mould |
| CN107913982A (en) * | 2017-11-08 | 2018-04-17 | 好米动力设备有限公司 | A kind of casting method of single-screw rotor |
| CN108115100A (en) * | 2018-01-17 | 2018-06-05 | 共享装备股份有限公司 | The method for preventing casting and female rotor shrinkage cavity and porosity |
| CN209050066U (en) * | 2018-09-10 | 2019-07-02 | 杭州西子富沃德精密机械有限公司 | A kind of running gate system of Capstan rotor casting |
| CN111790903A (en) * | 2019-04-09 | 2020-10-20 | 阿特拉斯·科普柯空气动力股份有限公司 | Method and apparatus for casting a rotor having a longitudinal axis |
-
2022
- 2022-06-07 CN CN202210636312.6A patent/CN114951554A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0061947A1 (en) * | 1981-03-13 | 1982-10-06 | Ets. POMPES GUINARD Société dite: | Rotor, means and method of making the same by moulding |
| TWI272147B (en) * | 2005-09-14 | 2007-02-01 | Fu Sheng Ind Co Ltd | Method for manufacturing spiral rotator of compressor |
| CN203343368U (en) * | 2013-07-19 | 2013-12-18 | 浙江汉声精密机械有限公司 | Spiral rotor mould |
| CN107913982A (en) * | 2017-11-08 | 2018-04-17 | 好米动力设备有限公司 | A kind of casting method of single-screw rotor |
| CN108115100A (en) * | 2018-01-17 | 2018-06-05 | 共享装备股份有限公司 | The method for preventing casting and female rotor shrinkage cavity and porosity |
| CN209050066U (en) * | 2018-09-10 | 2019-07-02 | 杭州西子富沃德精密机械有限公司 | A kind of running gate system of Capstan rotor casting |
| CN111790903A (en) * | 2019-04-09 | 2020-10-20 | 阿特拉斯·科普柯空气动力股份有限公司 | Method and apparatus for casting a rotor having a longitudinal axis |
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