CN112264596A - Pouring device for crown steel casting of thin-wall conical water turbine - Google Patents

Pouring device for crown steel casting of thin-wall conical water turbine Download PDF

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Publication number
CN112264596A
CN112264596A CN202011232221.3A CN202011232221A CN112264596A CN 112264596 A CN112264596 A CN 112264596A CN 202011232221 A CN202011232221 A CN 202011232221A CN 112264596 A CN112264596 A CN 112264596A
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China
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group
die
fixedly connected
transmission
water turbine
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CN202011232221.3A
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CN112264596B (en
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曾利平
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Shandong chenzhiyi Information Technology Co.,Ltd.
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Jingshan Yilong Steel Casting Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00Centrifugal casting; Casting by using centrifugal force
    • B22D13/04Centrifugal casting; Casting by using centrifugal force of shallow solid or hollow bodies, e.g. wheels or rings, in moulds rotating around their axis of symmetry
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00Centrifugal casting; Casting by using centrifugal force
    • B22D13/10Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
    • B22D13/101Moulds

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Gear Transmission (AREA)

Abstract

The invention discloses a pouring device for a thin-wall conical water turbine crown steel casting, which relates to the technical field of water turbine production and casting processing, and solves the problems that the existing casting device is generally a fixed mold, casting is carried out through gravity in use, air bubbles are easy to remain on the outer surface of a casting during casting, so that casting defects such as air holes, needle holes and the like are caused, the product quality is influenced, and the service life of the water turbine crown is influenced; the right side of the base is fixedly connected with a group of rotary driving pieces; the upper part of the base is connected with a group of upper templates in a sliding manner; the left side and the right side of the upper template are both rotatably connected with a group of follow-up bevel gears; the interior of the upper template is rotatably connected with a group of upper rotating transmission shafts. The invention can realize the rotation of the die, the molten steel flows to the outside under the action of centrifugal force, the accumulation of air bubbles on the outer surface is reduced, the occurrence probability of defects of air holes, needle holes and the like on the surface of a workpiece is reduced, the good product quality is ensured, the use is simple, and the operation is convenient.

Description

Pouring device for crown steel casting of thin-wall conical water turbine
Technical Field
The invention relates to the technical field of production and casting processing of water turbines, in particular to a pouring device for a crown steel casting of a thin-wall conical water turbine.
Background
The upper crown, the lower ring and the blades are called three castings of a water turbine runner, the core component of the water turbine of the hydroelectric generating set is the water turbine runner, the water turbine runner is formed by assembling and welding the upper crown, the lower ring and the blades, the upper crown of the conical water turbine is of a thin-wall structure with a conical cambered surface, and the upper crown of the conical water turbine is generally cast by adopting a casting device in the casting process.
For example, application No.: the invention relates to a pouring system of a crown steel casting of a thin-wall conical water turbine, which comprises a pouring cup, a vertical sprue, a horizontal slow-flow cross runner, a first-stage flow distribution runner, a second-stage flow distribution runner, a first cross runner and a second cross runner, wherein the tail end of the slow-flow cross runner is symmetrically branched into the first-stage flow distribution runner along two sides of a cavity, the tail end of each first-stage flow distribution runner is symmetrically branched into the second-stage flow distribution runner along the periphery of the bottom side of the cavity, the tail ends of the second-stage flow distribution runner are respectively connected with the cross runner, the cross runner comprises a first cross runner and a second cross runner, the first cross runner is horizontally arranged along the radial direction of the bottom of the cavity, the second cross runner is vertically connected with an oval inner runner, each circular inner runner is connected with a whole annular inner runner, the whole annular inner runner is communicated with the bottom of the cavity of, the circular ingate vertically extends upwards to the lower side of the thickest part in the middle of the casting cavity and is communicated with the cavity.
Based on the above, the existing casting device is generally a fixed mold, and during casting, air bubbles are easily left on the outer surface of a casting during casting, so that casting defects such as air holes and pin holes are caused, which affects product quality, the outer surface of the crown of the water turbine is a main working plane, and the defects such as the pin holes and the air holes increase fluid resistance, and also affect the service life of the crown of the water turbine; therefore, the existing requirements are not met, and a pouring device for the thin-wall conical turbine crown steel casting is provided for the thin-wall conical turbine crown steel casting.
Disclosure of Invention
The invention aims to provide a pouring device for a thin-wall conical water turbine crown steel casting, and aims to solve the problems that the existing casting device in the background art is generally of a fixed structure, and is cast by gravity in use, bubbles are easy to remain on the outer surface of the casting during casting, so that casting defects such as air holes and pin holes are caused, the product quality is influenced, the outer surface of the water turbine crown is a main working plane, and the defects such as the pin holes and the air holes can increase the fluid resistance and further influence the service life of the water turbine crown.
In order to achieve the purpose, the invention provides the following technical scheme: a pouring device for a crown steel casting of a thin-wall conical water turbine comprises a base; the right side of the base is fixedly connected with a group of rotary driving pieces; the upper part of the base is connected with a group of upper templates in a sliding manner; the tops of the left side and the right side of the base are fixedly connected with a group of mould opening and closing driving pieces; a piston rod of the die opening and closing driving piece is fixedly connected with the upper die plate; the middle part of the upper template is rotationally connected with a group of upper dies; the upper end surface of the lower part of the base is rotatably connected with a group of lower dies; the inner side of the lower part of the base is rotatably connected with a group of lower rotating transmission shafts; the left side and the right side of the base are both rotatably connected with a group of side transmission shafts; the left side and the right side of the upper template are both rotatably connected with a group of follow-up bevel gears; the interior of the upper template is rotatably connected with a group of upper rotating transmission shafts.
Preferably, the base is further provided with a guide slide rail, a group of guide slide rails is arranged at four corners of the top of the base, and the upper die plate is connected with the base in a sliding mode through the guide slide rails.
Preferably, the rotary driving part further comprises a driving bevel gear, a group of driving bevel gears is coaxially and fixedly connected to a rotating shaft of the rotary driving part, the side transmission shaft further comprises a side transmission bevel gear, a group of side transmission bevel gears is coaxially and fixedly connected to the bottom of the side transmission shaft, and the side transmission bevel gears at the bottoms of the group of side transmission shafts on the right side are meshed with the driving bevel gears to form a bevel gear transmission mechanism.
Preferably, the lower rotating transmission shaft further comprises a lower rotating shaft bevel gear, a group of lower rotating shaft bevel gears are coaxially and fixedly connected to the left end and the right end of the lower rotating transmission shaft, and the lower rotating shaft bevel gears at the two ends are respectively meshed with a group of side surface transmission bevel gears to form a bevel gear transmission mechanism.
Preferably, the lower rotary transmission shaft further comprises a lower die driving worm, the middle part of the lower rotary transmission shaft is coaxially and fixedly connected with a group of lower die driving worms, the lower die further comprises a lower die driven worm wheel, the bottom of the lower die is coaxially and fixedly connected with a group of lower die driven worm wheels, and the lower die driving worm and the lower die driven worm wheels are meshed to form a worm and gear transmission mechanism together.
Preferably, the side transmission shaft further comprises a transmission spline shaft, the top of the side transmission shaft is coaxially and fixedly connected with a group of transmission spline shafts, the servo bevel gear further comprises a spline hole, the middle of the servo bevel gear is provided with a group of spline holes, and the transmission spline shafts are in sliding connection with the spline holes.
Preferably, the upper rotating transmission shaft further comprises an upper die driven bevel gear, the left end and the right end of the upper rotating transmission shaft are both coaxially and fixedly connected with a group of upper die driven bevel gears, and the upper die driven bevel gears and the follow-up bevel gears are meshed to form a bevel gear transmission mechanism together.
Preferably, the upper rotating transmission shaft further comprises an upper die driving worm, the middle of the upper rotating transmission shaft is coaxially and fixedly connected with a group of upper die driving worms, the upper die further comprises an upper die driven worm wheel, the upper portion of the upper die is coaxially and fixedly connected with a group of upper die driven worm wheels, and the upper die driving worm and the upper die driven worm wheel are meshed to form a worm and worm transmission mechanism together.
Preferably, the lower die further comprises a die assembly guide rod, the eight-combined-die guide rod is uniformly distributed and fixedly connected on the periphery of the upper end face of the lower portion of the lower die, and the lower die is connected with the upper die in an inserting mode through the die assembly guide rod.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the upper die and the lower die synchronously rotate by adopting transmission modes such as bevel gear transmission, spline shaft transmission, worm and gear transmission and the like, the molten steel in the upper die and the lower die is driven to rotate by the rotation of the dies, the molten steel flows outwards under the action of centrifugal force in the rotating process of the molten steel, the accumulation of bubbles on the outer surface is reduced, the occurrence probability of defects such as air holes, pinholes and the like on the surface of a workpiece is reduced, the good product quality is ensured, the relative accuracy of die opening and closing positions at each time is ensured, and the casting precision is ensured.
The invention can realize the rotation of the die, and the molten steel flows to the outside under the action of centrifugal force through the rotation of the die, thereby reducing the accumulation of bubbles on the outer surface, reducing the occurrence probability of defects such as air holes, needle holes and the like on the surface of a workpiece, ensuring good product quality, having higher product quality, simple use and convenient operation.
Drawings
FIG. 1 is a schematic side view of the present invention;
FIG. 2 is a schematic side view of the drive shaft of the present invention;
FIG. 3 is a schematic side view of the transmission shaft of the side transmission shaft of the present invention;
FIG. 4 is a schematic side view of the drive shaft of the lower mold of the present invention;
FIG. 5 is a schematic side view of the lower mold of the present invention;
FIG. 6 is a schematic side view of the upper mold drive shaft of the present invention;
FIG. 7 is a schematic side view of the upper rotational drive shaft of the present invention;
FIG. 8 is a schematic side view of the shaft of the follower bevel gear of the present invention;
FIG. 9 is a schematic side view of the side drive shaft of the present invention;
in the figure: 1. a base; 101. a guide slide rail; 2. a rotary drive member; 201. a drive bevel gear; 3. a mold opening and closing driving member; 4. mounting a template; 5. a lower die; 501. a lower die driven worm gear; 502. a mold closing guide bar; 6. a lower rotary drive shaft; 601. the lower die drives the worm; 602. a lower rotary shaft bevel gear; 7. an upper die; 701. an upper die driven worm gear; 8. rotating the transmission shaft upwards; 801. the upper die drives the worm; 802. an upper die driven bevel gear; 9. a side transmission shaft; 901. a side drive bevel gear; 902. a transmission spline shaft; 10. a follow-up bevel gear; 1001. a splined bore.
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.
Referring to fig. 1 to 9, an embodiment of the present invention includes: a pouring device for a crown steel casting of a thin-wall conical water turbine comprises a base 1; the right side of the base 1 is fixedly connected with a group of rotary driving pieces 2; the upper part of the base 1 is connected with a group of upper templates 4 in a sliding way; the top parts of the left side and the right side of the base 1 are fixedly connected with a group of die opening and closing driving parts 3; a piston rod of the opening and closing die driving part 3 is fixedly connected with the upper die plate 4; the middle part of the upper template 4 is rotationally connected with a group of upper molds 7; the upper end surface of the lower part of the base 1 is rotationally connected with a group of lower dies 5; the inner side of the lower part of the base 1 is rotatably connected with a group of lower rotating transmission shafts 6; the left side and the right side of the base 1 are both rotatably connected with a group of side transmission shafts 9; the left side and the right side of the upper template 4 are both rotationally connected with a group of follow-up bevel gears 10; the inside of the upper template 4 is rotatably connected with a group of upper rotating transmission shafts 8.
Further, base 1 still includes direction slide rail 101, and the top four corners of base 1 all is provided with a set of direction slide rail 101, and cope match-plate pattern 4 passes through direction slide rail 101 and base 1 sliding connection, and in use, realizes the direction to cope match-plate pattern 4 through direction slide rail 101.
Further, the rotary driving member 2 further comprises a driving bevel gear 201, a group of driving bevel gears 201 are coaxially and fixedly connected to a rotating shaft of the rotary driving member 2, the side transmission shaft 9 further comprises a side transmission bevel gear 901, a group of side transmission bevel gears 901 are coaxially and fixedly connected to the bottom of the side transmission shaft 9, the side transmission bevel gears 901 at the bottoms of the group of right side transmission shafts 9 are meshed with the driving bevel gear 201 to jointly form a bevel gear transmission mechanism, and in use, the rotary driving member 2 drives the side transmission shaft 9 to rotate through the bevel gear transmission mechanism formed by the side transmission bevel gears 901 and the driving bevel gears 201 in a meshed mode.
Further, the lower rotating transmission shaft 6 further comprises a lower rotating shaft bevel gear 602, a group of lower rotating shaft bevel gears 602 is coaxially and fixedly connected to the left end and the right end of the lower rotating transmission shaft 6, the lower rotating shaft bevel gears 602 at the two ends are respectively meshed with a group of side transmission bevel gears 901 to form a bevel gear transmission mechanism, when the right group of side transmission shafts 9 rotate, the right group of side transmission shafts 9 drive the lower rotating transmission shaft 6 to rotate through a bevel gear transmission mechanism formed by meshing the lower rotating shaft bevel gear 602 and the side transmission bevel gears 901, and the lower rotating transmission shaft 6 drives the left group of side transmission shafts 9 to rotate through a bevel gear transmission mechanism formed by meshing the lower rotating shaft bevel gear 602 and the side transmission bevel gears 901.
Further, lower rotation transmission shaft 6 still includes lower mould drive worm 601, the coaxial fixedly connected with a set of lower mould drive worm 601 in middle part of lower rotation transmission shaft 6, bed die 5 still includes lower mould driven worm wheel 501, the coaxial fixedly connected with a set of lower mould driven worm wheel 501 in bottom of bed die 5, lower mould drive worm 601 and the meshing of lower mould driven worm wheel 501 constitute worm gear transmission mechanism jointly, in use, when rotation transmission shaft 6 rotates, lower rotation transmission shaft 6 drives lower mould 5 through the worm gear transmission mechanism that constitutes jointly by the meshing of lower mould drive worm 601 and lower mould driven worm wheel 501 and rotates.
Further, the side transmission shaft 9 further comprises a transmission spline shaft 902, the top of the side transmission shaft 9 is coaxially and fixedly connected with a group of transmission spline shafts 902, the servo bevel gear 10 further comprises a spline hole 1001, the middle of the servo bevel gear 10 is provided with a group of spline holes 1001, the transmission spline shafts 902 are in sliding connection with the spline holes 1001, and in use, the servo bevel gear 10 has good lifting capacity and good transmission between the servo bevel gear 10 and the side transmission shaft 9 is guaranteed through the sliding connection of the transmission spline shafts 902 and the spline holes 1001.
Further, the upper rotating transmission shaft 8 further comprises an upper die driven bevel gear 802, a group of upper die driven bevel gears 802 is coaxially and fixedly connected to the left end and the right end of the upper rotating transmission shaft 8, the upper die driven bevel gears 802 and the follow-up bevel gears 10 are meshed to form a bevel gear transmission mechanism, when in use, the two groups of follow-up bevel gears 10 are driven by the side transmission shafts 9 on the left side and the right side to rotate simultaneously, and the follow-up bevel gears 10 drive the upper rotating transmission shaft 8 to rotate through the bevel gear transmission mechanism formed by the meshing of the upper die driven bevel gears 802 and the follow-up bevel gears.
Further, the upper rotation transmission shaft 8 further comprises an upper die driving worm 801, the middle of the upper rotation transmission shaft 8 is coaxially and fixedly connected with a group of upper die driving worms 801, the upper die 7 further comprises an upper die driven worm gear 701, the upper portion of the upper die 7 is coaxially and fixedly connected with a group of upper die driven worm gears 701, the upper die driving worm 801 and the upper die driven worm gears 701 are meshed to form a worm and worm transmission mechanism together, and in use, when the upper rotation transmission shaft 8 rotates, the upper rotation transmission shaft 8 drives the upper die 7 to rotate through the worm and worm transmission mechanism formed by the meshing of the upper die driving worm 801 and the upper die driven worm gears 701.
Further, the lower die 5 further comprises a die assembly guide rod 502, the eight-combined-die guide rod 502 is uniformly distributed and fixedly connected on the periphery of the upper end face of the lower portion of the lower die 5, the lower die 5 is connected with the upper die 7 in an inserting mode through the die assembly guide rod 502, and in use, the upper die 7 is guided through the die assembly guide rod 502.
The working principle is as follows: when the mould opening and closing device is used, the mould opening and closing driving piece 3 drives the upper mould plate 4 to slide downwards, the upper mould 7 is pressed on the lower mould 5, and meanwhile, the upper mould 7 is guided through the mould closing guide rod 502; the rotary driving part 2 drives the side transmission shafts 9 to rotate through a bevel gear transmission mechanism formed by meshing a side transmission bevel gear 901 and a driving bevel gear 201 together, the right side group of side transmission shafts 9 drives the lower rotary transmission shaft 6 to rotate through a bevel gear transmission mechanism formed by meshing a lower rotary shaft bevel gear 602 and the side transmission bevel gear 901 together, the lower rotary transmission shaft 6 drives the left side group of side transmission shafts 9 to rotate through a bevel gear transmission mechanism formed by meshing a lower rotary shaft bevel gear 602 and the side transmission bevel gear 901 together, when the lower rotary transmission shaft 6 rotates, the lower rotary transmission shaft 6 drives the lower die 5 to rotate through a worm gear transmission mechanism formed by meshing a lower die driving worm 601 and a lower die driven worm gear 501 together, simultaneously, the left side transmission shaft 9 and the right side transmission shaft drive two groups of driven bevel gears 10 to simultaneously rotate, and the driven bevel gears 10 drive the two groups of driven bevel gears 10 through a bevel gear transmission mechanism formed by meshing an upper The upper rotary transmission shaft 8 is driven to rotate, the upper rotary transmission shaft 8 drives the upper die 7 to rotate through a worm gear transmission mechanism which is formed by meshing an upper die driving worm 801 and an upper die driven worm wheel 701 together, and the lower die 5 and the upper die 7 are driven to rotate simultaneously; meanwhile, molten steel is cast through a pouring gate at the top of the upper die 7, and after the molten steel enters the die cavity, the molten steel flows to the outside under the action of centrifugal force, so that the accumulation of air bubbles on the outer surface is reduced, the occurrence probability of defects such as air holes and pin holes on the surface of a workpiece is reduced, and good product quality is ensured.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (9)

1. The utility model provides a pouring device of thin wall toper hydraulic turbine crown steel casting which characterized in that: comprises a base (1); the right side of the base (1) is fixedly connected with a group of rotary driving pieces (2); the upper part of the base (1) is connected with a group of upper templates (4) in a sliding way; the tops of the left side and the right side of the base (1) are fixedly connected with a group of mould opening and closing driving pieces (3); a piston rod of the die opening and closing driving piece (3) is fixedly connected with the upper template (4); the middle part of the upper template (4) is rotationally connected with a group of upper molds (7); the upper end surface of the lower part of the base (1) is rotationally connected with a group of lower dies (5); the inner side of the lower part of the base (1) is rotatably connected with a group of lower rotary transmission shafts (6); the left side and the right side of the base (1) are both rotatably connected with a group of side transmission shafts (9); the left side and the right side of the upper template (4) are both rotationally connected with a group of follow-up bevel gears (10); the inner part of the upper template (4) is rotatably connected with a group of upper rotating transmission shafts (8).
2. The pouring device of the thin-wall conical water turbine crown steel casting according to claim 1, characterized in that: the base (1) is characterized by further comprising guide sliding rails (101), a group of guide sliding rails (101) are arranged at four corners of the top of the base (1), and the upper template (4) is connected with the base (1) in a sliding mode through the guide sliding rails (101).
3. The pouring device of the thin-wall conical water turbine crown steel casting according to claim 1, characterized in that: the rotary driving part (2) further comprises a driving bevel gear (201), a group of driving bevel gears (201) is coaxially and fixedly connected to a rotating shaft of the rotary driving part (2), the side transmission shaft (9) further comprises a side transmission bevel gear (901), a group of side transmission bevel gears (901) is coaxially and fixedly connected to the bottom of the side transmission shaft (9), and the side transmission bevel gears (901) at the bottoms of the group of side transmission shafts (9) on the right side are meshed with the driving bevel gears (201) to form a bevel gear transmission mechanism.
4. The pouring device of the thin-wall conical water turbine crown steel casting according to claim 1, characterized in that: the lower rotating transmission shaft (6) further comprises a lower rotating shaft bevel gear (602), the left end and the right end of the lower rotating transmission shaft (6) are coaxially and fixedly connected with a group of lower rotating shaft bevel gears (602), and the lower rotating shaft bevel gears (602) at the two ends are respectively meshed with a group of side surface transmission bevel gears (901) to form a bevel gear transmission mechanism.
5. The pouring device of the thin-wall conical water turbine crown steel casting according to claim 1, characterized in that: lower rotatory transmission shaft (6) are still including lower mould drive worm (601), the coaxial fixedly connected with in middle part of lower rotatory transmission shaft (6) a set of lower mould drive worm (601), and bed die (5) are still including lower mould driven worm wheel (501), and the coaxial fixedly connected with in bottom of bed die (5) a set of lower mould driven worm wheel (501), and lower mould drive worm (601) constitute worm gear drive jointly with lower mould driven worm wheel (501) meshing.
6. The pouring device of the thin-wall conical water turbine crown steel casting according to claim 1, characterized in that: the side transmission shaft (9) further comprises a transmission spline shaft (902), the top of the side transmission shaft (9) is coaxially and fixedly connected with a group of transmission spline shafts (902), the follow-up bevel gear (10) further comprises a spline hole (1001), the middle of the follow-up bevel gear (10) is provided with a group of spline holes (1001), and the transmission spline shafts (902) are in sliding connection with the spline holes (1001).
7. The pouring device of the thin-wall conical water turbine crown steel casting according to claim 1, characterized in that: the upper rotating transmission shaft (8) further comprises an upper die driven bevel gear (802), the left end and the right end of the upper rotating transmission shaft (8) are coaxially and fixedly connected with a group of upper die driven bevel gears (802), and the upper die driven bevel gears (802) are meshed with the driven bevel gears (10) to form a bevel gear transmission mechanism.
8. The pouring device of the thin-wall conical water turbine crown steel casting according to claim 1, characterized in that: the upper rotating transmission shaft (8) further comprises an upper die driving worm (801), the middle of the upper rotating transmission shaft (8) is coaxially and fixedly connected with a group of upper die driving worms (801), the upper die (7) further comprises an upper die driven worm wheel (701), the upper part of the upper die (7) is coaxially and fixedly connected with a group of upper die driven worm wheels (701), and the upper die driving worm (801) and the upper die driven worm wheels (701) are meshed to form a worm and worm transmission mechanism together.
9. The pouring device of the thin-wall conical water turbine crown steel casting according to claim 1, characterized in that: the lower die (5) further comprises a die assembly guide rod (502), the eight-combined-die guide rod (502) is uniformly distributed and fixedly connected on the periphery of the upper end face of the lower portion of the lower die (5), and the lower die (5) is connected with the upper die (7) in an inserting mode through the die assembly guide rod (502).
CN202011232221.3A 2020-11-06 2020-11-06 Pouring device for crown steel casting of thin-wall conical water turbine Active CN112264596B (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN112916815A (en) * 2021-01-28 2021-06-08 张宪钻 Corrosion-resistant and good centrifugal casting machine of sealing performance
CN113954342A (en) * 2021-10-19 2022-01-21 江阴中达软塑新材料股份有限公司 High-efficiency biaxial stretching propylene film manufacturing process and manufacturing device
CN117463974A (en) * 2023-12-26 2024-01-30 三明市金圣特种钢有限公司 Casting production equipment for cone piece of crusher

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CN204711264U (en) * 2015-06-23 2015-10-21 常州市环华机械有限公司 Pass hole slot working boring-machine
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CN111688262A (en) * 2020-07-02 2020-09-22 天津市海纳源科技有限公司 Die capable of being switched rapidly
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CN112916815A (en) * 2021-01-28 2021-06-08 张宪钻 Corrosion-resistant and good centrifugal casting machine of sealing performance
CN112916815B (en) * 2021-01-28 2022-05-03 济宁国弘机械科技有限公司 Corrosion-resistant and good centrifugal casting machine of sealing performance
CN113954342A (en) * 2021-10-19 2022-01-21 江阴中达软塑新材料股份有限公司 High-efficiency biaxial stretching propylene film manufacturing process and manufacturing device
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CN117463974A (en) * 2023-12-26 2024-01-30 三明市金圣特种钢有限公司 Casting production equipment for cone piece of crusher
CN117463974B (en) * 2023-12-26 2024-03-26 三明市金圣特种钢有限公司 Casting production equipment for cone piece of crusher

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