CN109434024B - Machining equipment and machining process for gear ring blank - Google Patents

Machining equipment and machining process for gear ring blank Download PDF

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Publication number
CN109434024B
CN109434024B CN201811587984.2A CN201811587984A CN109434024B CN 109434024 B CN109434024 B CN 109434024B CN 201811587984 A CN201811587984 A CN 201811587984A CN 109434024 B CN109434024 B CN 109434024B
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die
core
hole
mold
pouring
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CN109434024A (en
Inventor
石爱信
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Qingdao Jinhuan Autoparts Manufacture Co ltd
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Qingdao Jinhuan Autoparts Manufacture Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/06Permanent moulds for shaped castings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/06Permanent moulds for shaped castings
    • B22C9/065Cooling or heating equipment for moulds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/08Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/082Sprues, pouring cups
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/08Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/088Feeder heads
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/10Cores; Manufacture or installation of cores
    • B22C9/103Multipart cores
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/20Stack moulds, i.e. arrangement of multiple moulds or flasks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/22Moulds for peculiarly-shaped castings
    • B22C9/24Moulds for peculiarly-shaped castings for hollow articles

Abstract

The invention discloses a gear ring blank processing device, which comprises a die base, an outer die set inserted and matched at the upper end of the die base, a core die set arranged at the inner side of the outer die set and an upper die cover arranged at the upper end of the core die set, and also discloses a gear ring blank processing technology, which comprises the following steps: the method comprises the following steps: preparing materials; step two: preparing a mould; step three: integrally assembling the mold; step four: preheating a mould; step five: pouring the model; step six: curing and forming; step seven: opening the mold and taking out the part; step eight: trimming; step nine: and (5) aging treatment. In the invention, the outer die sleeve and the core die are of split structures, the processing and the manufacturing are simpler, and the surface quality of the model outline is greatly improved; whole processing equipment, once preparation can use repeatedly to its equipment is comparatively simple, can once produce many ring gear blanks, has improved production efficiency greatly.

Description

Machining equipment and machining process for gear ring blank
Technical Field
The invention relates to the technical field of gear ring blank processing, in particular to gear ring blank processing equipment and a gear ring blank processing technology.
Background
The manufacturing of a gear ring blank is an important link of gear ring processing, the quality of the gear ring blank determines the overall quality of a gear ring, the manufacturing of the gear ring blank in the prior art is mostly completed by forging, but under the conditions of severe working environment, heavy load and high impact frequency, the gear ring blank usually adopts an iron casting, particularly in some heavy and huge equipment, the manufacturing of a large gear ring is often completed by sand casting, the sand casting of the large gear ring is simple in operation process and low in production cost, but the following disadvantages exist in the actual operation process:
1. the sand mould made of the gear ring blank is huge, and the made sand mould needs to have very high strength to meet the casting requirement, so the difficulty of making the sand mould is high, and the rejection rate of the sand mould is high;
2. when the gear ring blank is cast by a sand mold, due to the large size of the gear ring blank, the phenomenon of insufficient pouring caused by fast cooling of molten iron can occur in the pouring process;
3. when the blank of the gear ring is cast by the sand mold, although the manufacturing cost of the sand mold is low, the manufacturing process is time-consuming, and the production efficiency cannot be further improved.
Disclosure of Invention
The invention aims to provide a gear ring blank processing technology, and aims to solve the problems that the sand mold manufactured by the gear ring blank in the background technology needs very high strength to meet the casting requirement due to the fact that the sand mold is huge, the manufacturing difficulty of the sand mold is high, the rejection rate of the sand mold is high, the phenomenon of insufficient pouring caused by fast cooling of molten iron occurs in the pouring process due to the fact that the size of the sand mold of the gear ring blank is large, the manufacturing cost of the sand mold is low, the manufacturing process is time-consuming, and the production efficiency cannot be further improved.
In order to achieve the purpose, the invention provides the following technical scheme: the machining equipment for the gear ring blank comprises a die base, an outer die set inserted and matched at the upper end of the die base, a core die set arranged on the inner side of the outer die set and an upper die cover arranged on the upper end of the core die set, wherein plug holes I with groove body structures are uniformly distributed at the upper end of the die base, a heat-conducting positioning column I with a rod-shaped structure is inserted and matched in the plug holes I at the middle position of the upper end surface of the die base, and a heat-conducting positioning column II with a rod-shaped structure is inserted and matched in the plug holes I at the outer side of the heat-conducting positioning;
the outer die set is formed by serially connecting outer die sleeves, the outer die sets are matched with a heat conduction positioning column II on the upper end face of the die base in an inserting mode, the main body of each outer die sleeve is formed by mutually embedding outer die blocks of a circular arc curved surface plate-shaped structure, a fixed connecting plate of the curved surface plate-shaped structure is fixedly connected to the outer side of each outer die block, the outer die blocks are fixedly connected with the fixed connecting plate through connecting bolts, one end of each outer die block is provided with a positioning groove of a groove body structure, a positioning block of a boss structure is arranged at the other end of each outer die block, the outer die blocks are matched with the positioning blocks in an inserting mode through the positioning grooves, inserting holes II of hole-shaped structures corresponding to the positions of the heat conduction positioning columns II at the upper ends of the die bases are uniformly distributed on the wall bodies of the outer die sleeves, heat conduction positioning columns II at the upper ends of the outer die sleeves are matched with inserting holes II at the lower ends of the outer Starting;
the core module is formed by serially connecting core moulds with cylindrical structures, a pouring hole with a hole-shaped structure is arranged in the middle of the core mould, a spacing ring with an annular structure is sleeved on the excircle of the core mould and divides the excircle of the core mould into a mould cavity with an upper annular groove body structure and a lower annular groove body structure equally, a flow guide hole with a hole-shaped structure is led from the inner wall of the pouring hole to the bottom of the mould cavity, the middle of the flow guide hole is divided into three sections of annular boss structures towards the upper side and the lower side of the core mould in an annular mode, the annular boss structure at the uppermost end is an upper mould section, the annular boss structure at the lowermost end is a lower mould section, the annular boss structure at the middle is a middle mould section, the upper mould section, the middle mould section and the lower mould section are fixed into a whole by bonding, a hole III with a hole-shaped structure corresponding to the position of a heat-conducting positioning column I on the upper end surface of the, the core molds are fixedly connected together through the insertion fit of the heat conduction positioning column I at the upper end of the core mold and the plug jack III at the lower end of the core mold;
the upper die cover is inserted into the upper ends of the outer die set and the core die set, a pouring hole II with a hole-shaped structure corresponding to the pouring hole is arranged in the middle of the upper die cover, a pouring cup with a horn-shaped structure is fixedly connected to the upper end of the pouring hole II, a plug hole IV with a hole-shaped structure corresponding to the position of a heat-conducting positioning column I at the upper end of the core die is arranged in the middle of the lower end face of the upper die cover, and a plug hole V with a hole-shaped structure corresponding to the position of the heat-conducting positioning column II at the upper end of the outer die sleeve is arranged on the outer side of the plug hole IV and the lower end face.
Preferably, two ends of the fixed connecting plate are respectively overlapped with the two outer modules which are matched in an embedded mode, the inner side face of the fixed connecting plate is attached to the outer side face of each outer module, and the connecting bolts are respectively fixed at two ends of the fixed connecting plate.
Preferably, risers with annular groove structures are uniformly distributed on the upper end face of the die cavity, and the flow guide holes are arranged in an umbrella shape from the inner wall of the pouring hole to the bottom of the die cavity.
Preferably, a wiring cavity of a groove body structure is arranged at the lower end of the mold base and below the plug jack I, a lead electrically connected with the lower end of the heat-conducting positioning column I is arranged in the wiring cavity, the lead is electrically connected with a power socket arranged on the outer side of the lower end of the mold base, and a sealing cover of a shell structure is embedded in the groove body of the wiring cavity at the lower end of the lead.
Preferably, the outer wall of the pouring hole is matched with the inner wall of the outer die block in a sliding fit mode, and the number of the core dies is equal to that of the outer die blocks, and the positions of the core dies correspond to those of the outer die blocks.
The invention also discloses a process for machining the gear ring blank by utilizing the gear ring blank machining equipment, which comprises the following steps of:
the method comprises the following steps: preparing materials, namely proportioning according to casting raw materials of the gear ring;
step two: preparing a die, cleaning die parts for casting a gear ring blank, brushing a release agent on the inner wall of an outer die block, the inner wall of a cavity of a die cavity, a pouring hole I, a flow guide hole, a pouring cup and a pouring hole II, smearing glue on the lower end surface of an upper die section, the upper end surface and the lower end surface of a middle die section and the upper end surface of a lower die section, splicing and bonding the upper die section, the middle die section and the lower die section into a core die, and brushing a layer of high-temperature-resistant sealant on the lower end surface of an entire outer die sleeve and the lower end of the core die;
step three: integrally assembling the die, namely firstly serially connecting the core die in the middle of the die base from bottom to top to form a core die set, then sleeving the outer die on the core die and serially connecting the outer die at the upper end of the die base to form an outer die set, and then inserting and matching the upper die cover at the upper ends of the core die set and the outer die set, thereby completing the assembly of the whole die;
step four: preheating a die, namely switching on a power socket and an external power supply to preheat the die through a heat conduction positioning column I and a heat conduction positioning column II, wherein the preheating temperature is 65-85 ℃;
step five: pouring the model, namely putting the prepared materials in the step one into a melting furnace to be heated into molten iron, then putting the molten iron into a pouring ladle and pouring the molten iron into the mold along a pouring cup at the upper end of the mold;
step six: solidifying and forming, namely standing for 4-6 hours after the pouring is finished, and cooling and solidifying the molten iron in the die cavity to form a pouring piece;
step seven: opening the mold and taking the casting, sequentially removing the upper mold cover and the outer mold sleeve from top to bottom, sequentially removing the upper mold section, the middle mold section and the lower mold section from top to bottom on the core mold, and further taking the casting out of the mold;
step eight: trimming, namely sawing off a casting rail on the casting from the casting, and then removing flash and burrs on the casting;
step nine: and (3) aging treatment, namely putting the casting into a heating furnace, heating to 550 ℃, then preserving heat for 4-8 hours, cooling to 150 ℃, discharging, and cooling at a speed of 15-20 ℃/hour to complete the preparation of the gear ring blank.
Compared with the prior art, the invention has the beneficial effects that: the invention has reasonable structure and strong functionality, and has the following advantages:
1. the outer die sleeve and the core die are of split structures, the processing and the manufacturing are simpler, and the surface quality of the profile of the die is greatly improved;
2. the mold cavity of the whole device is heated and insulated through the power socket, the lead, the heat-conducting positioning column I and the heat-conducting positioning column II, so that the cooling speed of molten iron can be reduced in the pouring process, the fluidity of the molten iron is improved, and the poured gear ring blank is full;
3. whole processing equipment, once preparation can use repeatedly to its equipment is comparatively simple, can once produce many ring gear blanks, has improved production efficiency greatly.
Drawings
FIG. 1 is an exploded view of the axial side structure of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a schematic cross-sectional view taken along line A-A in FIG. 2;
FIG. 4 is a right side view of the present invention;
FIG. 5 is a schematic cross-sectional view taken along line B-B in FIG. 4;
FIG. 6 is a side view of the mold base;
FIG. 7 is a view of a mold base in half section;
FIG. 8 is a front view of the outer die sleeve structure;
FIG. 9 is a cross-sectional view taken at C-C of FIG. 8;
fig. 10 is a half sectional view of the core mold;
FIG. 11 is a half sectional view of the upper mold cover.
In the figure: 1. a mold base; 2. an outer die sleeve; 3. a core mold; 4. putting a mold cover; 101. a jack I; 102. a heat-conducting positioning column I; 103. a heat-conducting positioning column II; 104. a wiring cavity; 105. a wire; 106. sealing the cover; 107. a power socket; 201. An outer module; 202. fixing the connecting plate; 203. a connecting bolt; 204. a jack II; 205. positioning a groove; 206. positioning blocks; 301. a pouring hole; 302. a mold cavity; 303. a riser; 304. a flow guide hole; 305. a patch jack III; 306. a mould loading section; 307. a spacer ring; 308. a middle mold section; 309. a lower die section; 401. pouring a cup; 402. a pouring hole II; 403. a patch hole IV; 404. a jack V.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 11, the present invention provides a technical solution: a gear ring blank processing device comprises a die base 1, an outer die set inserted and matched at the upper end of the die base 1, a core die set arranged at the inner side of the outer die set and an upper die cover 4 arranged at the upper end of the core die set, wherein the upper end of the die base 1 is uniformly provided with a socket I101 with a groove body structure, a heat-conducting positioning column I102 with a rod-shaped structure is inserted and matched in the socket I101 at the middle position of the upper end surface of the die base 1, and a heat-conducting positioning column II 103 with a rod-shaped structure is inserted and matched in the socket I101 at the outer side of the heat-conducting positioning column I102, wherein the heat-conducting positioning column I102 and the heat-conducting positioning column II 103;
the outer die set is formed by connecting outer die sleeves 2 in series, the outer die set is matched with a heat-conducting positioning column II 103 on the upper end face of a die base 1 in an inserting manner, the main body of the outer die sleeve 2 is formed by embedding and matching outer die blocks 201 with arc-shaped curved surface plate-shaped structures, fixed connecting plates 202 with curved surface plate-shaped structures are fixedly connected to the outer sides of the outer die blocks 201, the outer die blocks 201 are fixedly connected with the fixed connecting plates 202 through connecting bolts 203, one ends of the outer die blocks 201 are provided with positioning grooves 205 with groove body structures, the other ends of the outer die blocks 201 are provided with positioning blocks 206 with boss structures, the outer die blocks 201 are matched with the positioning blocks 206 in an inserting manner through the positioning grooves 205, inserting and connecting holes II 204 with hole-shaped structures corresponding to the positions of the heat-conducting positioning columns II 103 on the upper ends of the die base 1 are uniformly distributed on the wall bodies of, the outer die sleeves 2 are fixedly connected together through the insertion of the heat-conducting positioning columns II 103 at the upper ends of the outer die sleeves 2 and the insertion holes II 204 at the lower ends of the outer die sleeves 2, and the split structure of the outer die sleeves 2 enables the outer die sleeves 2 to be manufactured and disassembled easily, so that the assembly efficiency is improved;
the core module is formed by connecting a core mould 3 with a cylindrical structure in series, a pouring hole 301 with a hole-shaped structure is arranged in the middle of the core mould 3, a spacing ring 307 with an annular structure is sleeved on the excircle of the core mould 3, the excircle of the core mould 3 is equally divided into a mould cavity 302 with an upper annular groove body structure and a lower annular groove body structure by the spacing ring 307, a diversion hole 304 with a hole-shaped structure is led from the inner wall of the pouring hole 301 to the bottom of the mould cavity 302, the middle of the diversion hole 304 is annularly divided into three sections of annular boss structures towards the upper side and the lower side of the core mould 3, the annular boss structure at the uppermost end is an upper mould section 306, the annular boss structure at the lowermost end is a lower mould section 309, the annular boss structure at the middle is a middle mould section 308, the upper mould section 306, the middle mould section 308 and the lower mould section 309 are fixed into a whole by bonding, a plug hole III 305 with a hole-shaped structure corresponding to the, the upper end of the patch hole III 305 is inserted with a heat-conducting positioning column I102, the core mold 3 is fixedly connected with the patch hole III 305 at the lower end of the core mold 3 through the insertion of the heat-conducting positioning column I102 at the upper end of the core mold 3, and the core mold 3 is easy to manufacture, disassemble and assemble due to the split structure of the core mold 3, so that the assembly efficiency is improved;
an upper die cover 4 is inserted at the upper ends of the outer die set and the core die set, a pouring hole II 402 with a hole-shaped structure corresponding to the pouring hole 301 is arranged in the middle of the upper die cover 4, a pouring cup 401 with a horn-shaped structure is fixedly connected at the upper end of the pouring hole II 402, a plug hole IV 403 with a hole-shaped structure corresponding to the position of a heat-conducting positioning column I102 at the upper end of the core die 3 is arranged at the middle position of the lower end face of the upper die cover 4, and a plug hole V404 with a hole-shaped structure corresponding to the position of a heat-conducting positioning column II 103 at the upper end of the outer die sleeve 2 is arranged on the outer side of the plug hole IV 403 and.
Furthermore, two ends of the fixed connecting plate 202 are respectively overlapped with the two outer modules 201 which are matched with each other in an embedded manner, the inner side surface of the fixed connecting plate 202 is attached to the outer side surface of the outer module 201, the connecting bolts 203 are respectively fixed at two ends of the fixed connecting plate 202, and the outer modules 201 are fixedly connected into a whole through the fixed connecting plate 202.
Furthermore, risers 303 with an annular groove structure are uniformly distributed on the upper end surface of the mold cavity 302, the diversion holes 304 are arranged in an umbrella shape from the inner wall of the pouring hole 301 to the bottom of the mold cavity 302, and the diversion holes 304 are beneficial to the flow of molten iron in the whole mold cavity, so that the pouring efficiency and the pouring quality are improved.
Further, a wiring cavity 104 with a groove body structure is arranged at the lower end of the mold base 1 and below the plug jack I101, a lead 105 electrically connected with the lower end of the heat-conducting positioning column I102 is arranged in the wiring cavity 104, the lead 105 is electrically connected with a power socket 107 arranged at the outer side of the lower end of the mold base 1, a sealing cover 106 with a shell body structure is embedded in the groove body of the wiring cavity 104 at the lower end of the lead 105, the power socket 107 is communicated with an external power supply, and the heat-conducting positioning column I102 and the heat-conducting positioning column II 103 which are inserted in the plug jack I101 heat and preserve heat of the whole equipment.
Further, the outer wall of the pouring hole 301 is in sliding fit with the inner wall of the outer die block 201, and the number and the positions of the core die 3 and the outer die sleeve 2 are equal and correspond, so that the die cavity 302 forms a relatively closed gear ring blank cavity structure.
The invention also discloses a process for machining the gear ring blank by utilizing the gear ring blank machining equipment, which comprises the following steps of:
the method comprises the following steps: preparing materials, namely proportioning according to casting raw materials of the gear ring;
step two: preparing a die, cleaning die parts for casting a gear ring blank, brushing a release agent on the inner wall of an outer die block, the inner wall of a cavity of a die cavity, a pouring hole I, a flow guide hole, a pouring cup and a pouring hole II, smearing glue on the lower end surface of an upper die section, the upper end surface of a middle die section and the upper end surface of a lower die section, splicing and bonding the upper die section, the middle die section and the lower die section into a core die, brushing a layer of high-temperature-resistant sealant on the lower end surface of an entire outer die sleeve and the lower end of the core die to ensure that a die cavity group between the entire outer die set and the core die forms a closed pouring die cavity, and further ensuring the pouring quality of the gear ring blank;
step three: the die is integrally assembled, wherein a core die is connected in series in the middle of a die base from bottom to top to form a core die set, an outer die is sleeved outside the core die and connected in series at the upper end of the die base to form an outer die set, and an upper die cover is inserted and assembled at the upper ends of the core die set and the outer die set, so that the whole die is assembled;
step four: preheating a die, namely switching on a power socket and an external power supply to preheat the die through a heat conduction positioning column I and a heat conduction positioning column II, wherein the preheating temperature is 65-85 ℃;
step five: pouring the model, namely putting the prepared materials in the step one into a melting furnace to be heated into molten iron, then putting the molten iron into a pouring ladle and pouring the molten iron into the mold along a pouring cup at the upper end of the mold;
step six: solidifying and forming, namely standing for 4-6 hours after the pouring is finished, and cooling and solidifying the molten iron in the die cavity to form a pouring piece;
step seven: opening the die to take out a part, sequentially removing the upper die cover and the outer die sleeve from top to bottom, sequentially removing the upper die section, the middle die section and the lower die section on the core die from top to bottom, further taking out the casting part from the die, and taking care to avoid collision between the die and the gear ring blank in the process of taking out the die part;
step eight: trimming, namely sawing off a casting rail on the casting from the casting, and then removing flash and burrs on the casting to reduce the processing difficulty of the next step;
step nine: and (3) aging treatment, namely putting the casting into a heating furnace, heating to 550 ℃, then preserving heat for 4-8 hours, cooling to 150 ℃, discharging, and cooling at a speed of 15-20 ℃/hour to complete the preparation of the gear ring blank.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a processing equipment of ring gear blank, includes that mould base (1), mould base (1) upper end are inserted the outer module of joining in marriage, the core module that outer module inboard was established and upper die cover (4) that core module group upper end was established, its characterized in that: the upper end of the die base (1) is uniformly provided with plug holes I (101) with groove body structures, heat-conducting positioning columns I (102) with rod-shaped structures are inserted in the plug holes I (101) at the middle positions of the upper end face of the die base (1), and heat-conducting positioning columns II (103) with rod-shaped structures are inserted in the plug holes I (101) at the outer sides of the heat-conducting positioning columns I (102);
the outer die set is formed by connecting outer die sleeves (2) in series, the outer die set is matched with a heat-conducting positioning column II (103) on the upper end face of a die base (1) in an inserting manner, the main body of the outer die sleeve (2) is formed by matching outer die blocks (201) of arc-shaped curved-surface plate-shaped structures in an embedding manner, the outer sides of the outer die blocks (201) are fixedly connected with fixed connecting plates (202) of the curved-surface plate-shaped structures, the outer die blocks (201) are fixedly connected with the fixed connecting plates (202) through connecting bolts (203), one ends of the outer die blocks (201) are provided with positioning grooves (205) of groove body structures, the other ends of the outer die blocks (201) are provided with positioning blocks (206) of boss structures, the outer die blocks (201) are matched with the positioning blocks (206) in an inserting manner through the positioning grooves (205), and inserting holes II (204) of heat-conducting hole-shaped structures corresponding to the positions of the positioning columns II (103) on the upper end of, the upper end of the outer die sleeve (2) is inserted with a heat-conducting positioning column II (103) in the plug jack II (204), and the outer die sleeve (2) is fixedly connected with the plug jack II (204) at the lower end of the outer die sleeve (2) through the heat-conducting positioning column II (103) at the upper end of the outer die sleeve (2) in a plug-in manner;
the core module is formed by connecting core moulds (3) of cylindrical structures in series, a pouring hole (301) of a hole-shaped structure is arranged in the middle of each core mould (3), a spacing ring (307) of an annular structure is sleeved on the excircle of each core mould (3), the excircle of each core mould (3) is equally divided into a die cavity (302) of an upper annular groove body structure and a lower annular groove body structure by the spacing ring (307), a guide hole (304) of the hole-shaped structure is guided to the bottom of the die cavity (302) from the inner wall of each pouring hole (301), the middle of each guide hole (304) is annularly divided into three sections of annular boss structures towards the upper side and the lower side of each core mould (3), the annular boss structures at the uppermost end are upper mould sections (306), the annular boss structures at the lowermost end are lower mould sections (309), the annular boss structures at the middle part are middle mould sections (308), and the upper mould sections (306), the middle mould sections (308) and the lower mould sections (, a plug hole III (305) with a hole-shaped structure corresponding to the position of the heat-conducting positioning column I (102) on the upper end surface of the mold base (1) is arranged from the upper end of the core mold (3) to the lower end of the core mold (3), the upper end of the plug hole III (305) is inserted with the heat-conducting positioning column I (102), and the core molds (3) are fixedly connected together through the insertion of the heat-conducting positioning column I (102) on the upper end of the core mold (3) and the plug hole III (305) on the lower end of the core mold (3);
the upper die cover (4) is inserted at the upper ends of the outer die set and the core die set, a pouring hole II (402) with a hole-shaped structure corresponding to the pouring hole (301) is arranged in the middle of the upper die cover (4), a pouring cup (401) with a horn-shaped structure is fixedly connected to the upper end of the pouring hole II (402), a plug hole IV (403) with a hole-shaped structure corresponding to the position of a heat-conducting positioning column I (102) at the upper end of the core die (3) is arranged at the middle position of the lower end face of the upper die cover (4), and a plug hole V (404) with a hole-shaped structure corresponding to the position of a heat-conducting positioning column II (103) at the upper end of the outer die sleeve (2) is arranged on the outer side of the plug hole IV (403) and the lower end face of.
2. The gear ring blank machining apparatus as set forth in claim 1, wherein: the two ends of the fixed connecting plate (202) are respectively overlapped with the two outer modules (201) which are matched in an embedded mode, the inner side face of the fixed connecting plate (202) is attached to the outer side face of each outer module (201), and the connecting bolts (203) are respectively fixed at the two ends of the fixed connecting plate (202).
3. The gear ring blank machining apparatus as set forth in claim 1, wherein: risers (303) with annular groove body structures are uniformly distributed on the upper end face of the die cavity (302), and the flow guide holes (304) are arranged in an umbrella shape from the inner wall of the pouring hole (301) to the bottom of the die cavity (302).
4. The gear ring blank machining apparatus as set forth in claim 1, wherein: the die comprises a die base (1), a wiring cavity (104) of a groove body structure is arranged at the lower end of the die base (1) and below a patch hole I (101), a lead (105) electrically connected with the lower end of a heat-conducting positioning column I (102) is arranged in the wiring cavity (104), the lead (105) is electrically connected with a power socket (107) arranged on the outer side of the lower end of the die base (1), and a sealing cover (106) of a shell structure is embedded into the groove body of the wiring cavity (104) and at the lower end of the lead (105).
5. The gear ring blank machining apparatus as set forth in claim 1, wherein: the outer wall of the pouring hole (301) is matched with the inner wall of the outer die block (201) in a sliding fit mode, and the number of the core dies (3) is equal to that of the outer die sleeves (2) and the positions of the core dies and the outer die sleeves correspond to each other.
6. A process for machining a ring gear blank by using the ring gear blank machining apparatus according to any one of claims 1 to 5, wherein the product machining flow comprises the steps of:
the method comprises the following steps: preparing materials, namely proportioning according to casting raw materials of the gear ring;
step two: preparing a die, cleaning die parts for casting a gear ring blank, brushing a release agent on the inner wall of an outer die block, the inner wall of a cavity of a die cavity, a pouring hole I, a flow guide hole, a pouring cup and a pouring hole II, smearing glue on the lower end surface of an upper die section, the upper end surface and the lower end surface of a middle die section and the upper end surface of a lower die section, splicing and bonding the upper die section, the middle die section and the lower die section into a core die, and brushing a layer of high-temperature-resistant sealant on the lower end surface of an entire outer die sleeve and the lower end of the core die;
step three: integrally assembling the die, namely firstly serially connecting the core die in the middle of the die base from bottom to top to form a core die set, then sleeving the outer die on the core die and serially connecting the outer die at the upper end of the die base to form an outer die set, and then inserting and matching the upper die cover at the upper ends of the core die set and the outer die set, thereby completing the assembly of the whole die;
step four: preheating a die, namely switching on a power socket and an external power supply to preheat the die through a heat conduction positioning column I and a heat conduction positioning column II, wherein the preheating temperature is 65-85 ℃;
step five: pouring the model, namely putting the prepared materials in the step one into a melting furnace to be heated into molten iron, then putting the molten iron into a pouring ladle and pouring the molten iron into the mold along a pouring cup at the upper end of the mold;
step six: solidifying and forming, namely standing for 4-6 hours after the pouring is finished, and cooling and solidifying the molten iron in the die cavity to form a pouring piece;
step seven: opening the mold and taking the casting, sequentially removing the upper mold cover and the outer mold sleeve from top to bottom, sequentially removing the upper mold section, the middle mold section and the lower mold section from top to bottom on the core mold, and further taking the casting out of the mold;
step eight: trimming, namely sawing off a casting rail on the casting from the casting, and then removing flash and burrs on the casting;
step nine: and (3) aging treatment, namely putting the casting into a heating furnace, heating to 550 ℃, then preserving heat for 4-8 hours, cooling to 150 ℃, discharging, and cooling at a speed of 15-20 ℃/hour to complete the preparation of the gear ring blank.
CN201811587984.2A 2018-12-25 2018-12-25 Machining equipment and machining process for gear ring blank Active CN109434024B (en)

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CN110181380B (en) * 2019-05-31 2020-07-10 广东长盈精密技术有限公司 Polishing jig
CN110449553A (en) * 2019-08-26 2019-11-15 贵州安吉航空精密铸造有限责任公司 A kind of joining method that several type core loose piece splicing groups are circularized to type core
CN111702132A (en) * 2020-06-11 2020-09-25 江苏威尔森环保设备有限公司 Preparation process for annular reinforcing rib

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