CN214977556U - Mould device for horizontal rotation centrifugal casting grinding ball - Google Patents
Mould device for horizontal rotation centrifugal casting grinding ball Download PDFInfo
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- CN214977556U CN214977556U CN202120654027.8U CN202120654027U CN214977556U CN 214977556 U CN214977556 U CN 214977556U CN 202120654027 U CN202120654027 U CN 202120654027U CN 214977556 U CN214977556 U CN 214977556U
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Abstract
The utility model relates to a mould device of horizontal rotation centrifugal casting ball, it belongs to machinery class field. The utility model comprises a plurality of mould closing positioning pins, a plurality of mould closing positioning pin holes, a plurality of mould closing locking screw rods, a horizontally parting grinding ball metal upper mould and a grinding ball metal lower mould, wherein the grinding ball metal upper mould and the grinding ball metal lower mould are locked by the plurality of mould closing locking screw rods after mould closing; a plurality of mould closing positioning pin holes are formed in the upper grinding ball metal mould, a plurality of mould closing positioning pins are arranged in the lower metal mould, and the plurality of mould closing positioning pins are matched with the plurality of mould closing positioning pin holes. The utility model discloses overall structure design is simple reasonable, and is reliable and stable, simplifies the process flow who casts ball production greatly, improves the technology export rate of casting the ball, improves the tissue compactness of casting the ball to reduce the manufacturing cost of casting the ball, improve the quality of casting the ball, the shaping production of fine completion ball.
Description
Technical Field
The utility model relates to a mould of casting metal grinding ball, especially a mould device of horizontal rotation centrifugal casting grinding ball that can be used to grinding ball casting production. It belongs to the field of machinery.
Background
The metal grinding ball is an abrasion-resistant consumable widely used in metallurgy, mine, building material and other industries, and the annual demand is large. The casting grinding ball is made of chromium, austempered ductile iron, white cast iron and the like, the casting forming modes mainly comprise metal sand sleeve casting, resin sand casting, iron mold sand-coated casting, lost foam casting tfkp and the like at present, the production modes have advantages respectively, but in the production process, the grinding ball needs to be fed through a certain riser and a runner to obtain the grinding ball with compact structure, and the casting mold of the casting ball needs to be formed by molding sand partially or completely. In contrast, the core structure of the grinding ball is loosened to a certain extent, and the utilization rate of molten iron is not high due to the existence of a feeding head and a pouring gate in casting production, and is generally about 80% or even lower; and the equipment investment for realizing mechanical and automatic production in actual production is large.
The casting ball is cast by adopting sand shooting for molding; some casting methods adopt solid mold casting, and vacuum pumping is adopted through coating and pouring. The process control of these processes is relatively complex. For example, the process flow of casting the grinding ball by using iron mold sand lining comprises the following steps: the method comprises the steps of heating a grinding ball model, sand coating and molding of an inner cavity of a grinding ball iron mold, checking a cavity after molding, removing floating sand, combining and fastening upper and lower iron molds, pouring, solidifying and cooling, fastening and loosening upper and lower iron molds, opening upper and lower iron molds to produce castings, cleaning sand shooting holes of the iron molds and residual sand in the inner cavity of the iron molds, and the like, wherein some procedures are difficult to realize mechanization and automation, and a large amount of funds and equipment are required to be invested.
How to improve the process outlet rate of casting grinding balls, well realize the level of mechanization and automation of casting ball production, reduce the production cost of casting balls and improve the internal quality of casting balls becomes the main target of the pursuit of casting ball production.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide an overall structure design simple reasonable, reliable and stable, simplify the process flow of casting ball production greatly, improve the process exit rate of casting ball, improve the tissue compactness of casting ball, reduce the manufacturing cost of casting ball from the face, improve the mould device of the horizontal rotation centrifugation casting ball of the quality of casting ball.
The utility model provides a technical scheme that above-mentioned problem adopted is: this mould device of horizontal rotation centrifugal casting ball, including a plurality of mould assembling locating pins, a plurality of mould assembling locating pin holes and a plurality of mould assembling locking screw, its characterized in that: the grinding ball metal mold upper die and the grinding ball metal mold lower die are locked by a plurality of die assembling locking screws after being assembled in a die; a plurality of mould closing positioning pin holes are formed in the upper grinding ball metal mould, a plurality of mould closing positioning pins are arranged in the lower metal mould, and the plurality of mould closing positioning pins are matched with the plurality of mould closing positioning pin holes.
Preferably, in the mould, each grinding ball cavity is arranged on a circumferential line which takes the centre of the mould as the circle center; the molten metal injection cavity of the metal mold is circumferential, and the bottom of the molten metal injection cavity is arranged in a sunken radian mode.
As preferred, the utility model discloses still include mould assembling locking through-hole, mould assembling locking screw and mould assembling lock nut, it has four mould assembling locking through-holes to open on the ball metal mould, and open ball metal mould lower mould has four mould assembling locking screws, and this mould assembling locking through-hole corresponds each other with mould assembling locking screw, and is fixed with mould assembling locking screw cooperation through mould assembling lock nut.
Preferably, the cavity of the upper mold of the metal mold for grinding balls comprises an upper half ball of a grinding ball cavity, an upper half runner of a molten iron injection opening of the grinding balls for allowing molten metal to enter the grinding ball cavity, and an upper concave wedge edge at the upper part of the molten iron injection cavity and the edge of the excircle of the upper mold;
preferably, the cavity of the metal mold lower die for grinding the ball comprises a lower half ball of the grinding ball cavity, a lower half runner of a molten iron injection opening of the grinding ball for allowing molten metal to enter the grinding ball cavity, and an upper convex wedge edge at the lower part of the molten iron injection cavity and the outer circle edge of the lower die;
as preferred, the utility model discloses still include the molten iron and pour into chamber bayonet socket height into, this molten iron pours into the position of chamber bayonet socket height into and is within grinding ball radius +20 millimeters.
As preferred, mould assembling locating pin hole and mould assembling locking screw are four.
Preferably, the centrifugal linear speed range of the centrifugal casting of the utility model is 20-27 m/s.
Preferably, the clearance between the concave wedge edge on the excircle of grinding ball metal mold upper die and the concave wedge edge on the excircle of grinding ball metal mold lower die and the convex wedge edge is 0.15 mm.
Preferably, the utility model discloses the molten metal gets into the grinding ball molten iron filling opening of grinding ball die cavity runner and grinding ball contact department is conical, and its minimum diameter is associated with the size of grinding ball, and the minimum diameter size of the grinding ball molten iron filling opening of 100 millimeters grinding balls is 20 millimeters.
Compared with the prior art, the utility model, have following advantage and effect: 1. the grinding ball mold is simple and reasonable in overall structure design, stable and reliable, molten iron is filled in a grinding ball cavity of a metal mold under the action of centrifugal force in a mode of centrifugally rotating the metal mold, and the molten iron in the grinding ball cavity is fed, so that a grinding ball with a compact tissue is obtained; 2. the production process flow of the cast grinding ball is greatly simplified, and the mechanical production of the cast ball is easy to realize; 3. the process yield of the cast grinding ball is improved, so that the production cost of the cast grinding ball is reduced; 4. the produced grinding ball has compact integral structure and greatly improves the wear resistance of the grinding ball.
Drawings
FIG. 1 is a schematic structural diagram of a horizontal rotation centrifugal casting metal mold for casting grinding balls according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an upper die of a metal mold for grinding balls according to an embodiment of the present invention.
Fig. 3 is a schematic sectional structure view of a-a in fig. 2.
Fig. 4 is a schematic structural view of a metal mold lower die for grinding balls according to an embodiment of the present invention.
Fig. 5 is a schematic sectional structure view of B-B in fig. 4.
Fig. 6 is a schematic diagram of a mold closing structure of a metal mold according to an embodiment of the present invention.
FIG. 7 is a schematic view showing a first process of producing a horizontally rotating centrifugally cast grinding ball according to an embodiment of the present invention.
FIG. 8 is a schematic view of the production process of the horizontal rotation centrifugal casting grinding ball of the embodiment of the present invention.
FIG. 9 is a third schematic view of the production process of the horizontal rotation centrifugal casting grinding ball of the embodiment of the present invention.
Fig. 10 is a fourth schematic view of the production process of the horizontally rotating centrifugally cast grinding ball according to the embodiment of the present invention.
Fig. 11 is a schematic view showing a fifth production process of a horizontally rotating centrifugally cast grinding ball according to an embodiment of the present invention.
Fig. 12 is a schematic view six illustrating a production process of a horizontally rotating centrifugally cast grinding ball according to an embodiment of the present invention.
Fig. 13 is a schematic diagram seven of the production process of the horizontal rotation centrifugal casting grinding ball of the embodiment of the invention.
In the figure: the grinding ball metal mold comprises a grinding ball metal mold upper mold 1, a grinding ball metal mold lower mold 2, a mold closing positioning pin 3, a mold closing positioning pin hole 4, a grinding ball cavity 5, a grinding ball molten iron injection port 6, a metal type molten iron injection cavity 7, a molten iron injection cavity bayonet height 8, a mold closing locking screw rod 9, a mold closing locking nut 10, a mold closing locking through hole 11, a mold closing locking screw hole 12, a horizontal rotary centrifugal machine 13 and a gap H.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples are given.
Referring to fig. 1 to 13, the mold device for horizontal rotation centrifugal casting of a grinding ball in the present embodiment includes a mold closing positioning pin 3, a mold closing positioning pin hole 4, a mold closing locking screw 9, a horizontally split upper mold 1 of a grinding ball metal mold and a lower mold 2 of the grinding ball metal mold, and the upper mold 1 of the grinding ball metal mold and the lower mold 2 of the grinding ball metal mold are locked by four mold closing locking screws 9 after being closed.
In the mold of the embodiment, each grinding ball cavity 5 is arranged on a circumferential line with the center of the mold as the center of a circle; the molten iron injection cavity 7 of the metal mold is circumferential, and the bottom of the metal mold is arranged in a sunken arc shape (molten iron splashing is prevented when the molten iron begins to be poured).
The cavity of the upper mold 1 of the metal mold for grinding balls in this embodiment comprises an upper hemisphere provided with a grinding ball cavity 5, an upper half runner of a molten iron injection port of the grinding ball for allowing molten metal to enter the grinding ball cavity 5, and an upper concave wedge edge at the upper part of the molten iron injection cavity and the edge of the outer circle of the upper mold.
The cavity of the metal mold lower mold 2 for grinding the ball in this embodiment comprises a lower hemisphere provided with a grinding ball cavity 5, a lower half runner of a grinding ball molten iron injection port through which molten metal enters the grinding ball cavity 5, and an upper convex wedge edge at the lower part of the molten iron injection cavity and the edge of the outer circle of the lower mold.
Four mould assembling positioning pin holes 4 are arranged in the grinding ball metal upper mould 1, four mould assembling positioning pins 3 are arranged in the metal lower mould 2, and the four mould assembling positioning pins 3 are matched with the four mould assembling positioning pin holes 4.
In the embodiment, the upper grinding ball metal mold die 1 is provided with four die-assembling locking through holes 11, the lower grinding ball metal mold die 2 is provided with four die-assembling locking screw holes 12, the die-assembling locking through holes 11 correspond to the die-assembling locking screw holes 12, and the die-assembling locking through holes are matched and fixed with a die-assembling locking screw rod 9 through a die-assembling locking nut 10; the locking device is used for locking the upper die 1 of the metal grinding ball mould and the lower die 2 of the metal grinding ball mould during centrifugal casting, solidification and cooling.
In the embodiment, the position of the bayonet height 8 of the molten iron injection cavity is within +20 mm of the radius of the grinding ball; the centrifugal linear speed range of centrifugal casting is 20-27 m/s;
in this embodiment, the clearance H between the upper concave wedge edge and the upper convex wedge edge of the outer circles of the upper grinding ball metal mold die 1 and the lower grinding ball metal mold die 2 is 0.15 mm.
The molten iron injection port 6 of the grinding ball cavity of the embodiment has a conical runner, the diameter of the grinding ball is 100 mm, and the minimum diameter of the cone is about 20 mm.
The specific steps of the grinding ball forming of the mold for horizontally rotating and centrifugally casting the grinding ball in the embodiment are as follows: the upper grinding ball metal mold die 1 is boxed on the lower grinding ball metal mold die 2 on a centrifugal device which rotates horizontally, and then the upper grinding ball metal mold die 1 and the lower grinding ball metal mold die 2 are locked by a box closing locking screw rod 9; after the horizontal centrifugal device is rotated and started, molten iron is poured, and then molten iron is leaked from the joint parting surface of the upper die and the lower die of the grinding ball metal mold in the process of solidifying and cooling in the upper die 1 and the lower die 2 of the grinding ball metal mold;
starting a power device of a horizontal rotary centrifuge 13 to horizontally rotate the upper mold 1 and the lower mold 2 of the grinding ball metal mold after the mold closing is locked, when the central linear velocity of the grinding balls of the upper mold 1 and the lower mold 2 of the grinding ball metal mold reaches 22-30 m/s, quantitatively injecting molten high-temperature molten iron into a molten metal liquid storage cavity (molten metal injection cavity 7) at the central part of the mold closing of the grinding ball metal mold, wherein the molten iron height cannot exceed the bayonet height 8 of the molten iron injection cavity in the pouring process (see fig. 1); the centrifugal force generated by the horizontal centrifugal device is prevented from throwing out the molten iron, so that potential safety hazards are prevented;
under the action of centrifugal force generated by a horizontal rotary centrifuge 13, molten iron in a molten metal liquid storage cavity (molten metal injection cavity 7) at the central part of a grinding ball metal mold enters into each grinding ball cavity in an upper grinding ball metal mold 1 and a lower grinding ball metal mold 2 through a cavity runner (molten metal injection inlet 6) of each grinding ball in the grinding ball metal mold until each grinding ball cavity 5 is completely filled, and the horizontal rotary centrifuge 13 keeps rotating all the time in the subsequent molten iron solidification and cooling process, so that residual molten iron in the molten metal liquid storage cavity (molten metal injection cavity 7) in the upper grinding ball metal mold 1 and the lower grinding ball metal mold 2 continues to be subjected to shrinkage at a certain pressure under the action of the generated centrifugal force, the grinding ball structure of the grinding ball metal mold is compact, and the problem that the molten iron is cooled in the grinding ball casting production is solved, The shrinkage and shrinkage defects inside the grinding ball are caused by solidification shrinkage, after molten grinding ball iron in each grinding ball cavity in the grinding ball metal mold is completely solidified, a motor power supply of a horizontal centrifugal rotating device for casting production of the grinding ball is disconnected, the horizontal centrifugal device gradually stops horizontal rotation, after the horizontal rotation is stopped, a box closing locking screw rod 9 of the grinding ball metal mold upper die 1 and the grinding ball metal mold lower die 2 is loosened and taken down, the grinding ball metal mold upper die 1 is opened, the grinding ball metal mold upper die 1 is lifted away from the grinding ball metal mold lower die 2, then the grinding ball can be taken away from the grinding ball metal mold lower die 2, and one-time grinding ball forming production is completed.
The working principle of the embodiment is as follows: the casting of the metal grinding ball is generally formed by adopting a gravity casting mode, namely, under the gravity condition, molten metal enters through a casting system of a casting mold to fill a grinding ball casting mold cavity, and in the subsequent solidification cooling process, molten iron in the grinding ball mold cavity 5 can be subjected to liquid state and solidification shrinkage through a riser in the casting mold casting system to carry out feeding, so that a qualified grinding ball casting is finally obtained.
The forming mode of this embodiment casting ball is different completely with ordinary gravity casting forming mode, molten iron that the molten iron poured into horizontal rotation's mould pours into the die cavity into, under the effect of rotatory centrifugal force, molten iron that the molten iron pours into in the die cavity passes through ball molten iron filling opening 6 of ball die cavity 5, get into ball die cavity 5, in solidification cooling process afterwards, the molten metal is under the effect of centrifugal force, the molten iron is crowded to ball die cavity 5 constantly, thereby constantly carry out the feeding to the molten iron in ball die cavity 5 in the molten iron solidification cooling process, the feeding effect of molten iron under the centrifugal force is superior to the feeding effect under the gravity condition far away, and the utilization ratio of molten iron is also higher than gravity casting far away, can improve the technological yield of ball casting production greatly. The internal integral compactness of the produced grinding ball is far superior to that of a gravity casting grinding ball, the wear-resistant mechanical property of the grinding ball is more excellent, and the service life of the grinding ball is longer.
In this embodiment, a plurality of grinding ball cavities are arranged on an outer ring (a circumferential line with a center of the mold as a center) of a metal mold casting mold by a centrifugal casting process, and a grinding ball cavity 5 is communicated with a metal inner ring (a metal mold molten iron injection cavity 7) through a small channel (a grinding ball molten iron injection port 6) to form a channel for molten iron to enter the grinding ball cavity 5. After molten iron is poured into the metal inner ring, the molten iron is continuously squeezed into the grinding ball cavity 5 under the action of centrifugal force until the grinding ball cavity 5 is full, and the molten iron entering the grinding ball cavity 5 is continuously fed until the molten iron is cooled to finally form a compact grinding ball.
The brand new casting grinding ball mode developed by the embodiment can greatly simplify the process flow of casting ball production, improve the process outlet rate of casting grinding balls, improve the tissue compactness of the casting grinding balls, reduce the production cost of the casting grinding balls from the aspect and improve the quality of the casting grinding balls.
And will be apparent to those skilled in the art from the foregoing description.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (10)
1. The utility model provides a mould device of horizontal rotation centrifugal casting ball, includes a plurality of mould assembling locating pins (3), a plurality of mould assembling locating pin holes (4) and a plurality of mould assembling locking screw (9), its characterized in that: the grinding ball metal mold comprises a grinding ball metal mold upper die (1) and a grinding ball metal mold lower die (2) which are horizontally split, wherein the grinding ball metal mold upper die (1) and the grinding ball metal mold lower die (2) are locked by a plurality of box closing locking screws (9) after being closed; a plurality of mould assembling positioning pin holes (4) are formed in the grinding ball metal upper mould (1), a plurality of mould assembling positioning pins (3) are formed in the metal lower mould (2), and the plurality of mould assembling positioning pins (3) are matched with the plurality of mould assembling positioning pin holes (4).
2. The mold apparatus for horizontal spin centrifugal casting of grinding balls according to claim 1, wherein: the molten iron pouring device is characterized by further comprising a metal type molten iron pouring cavity (7), wherein the metal type molten iron pouring cavity (7) is of a circumferential shape, and the bottom of the metal type molten iron pouring cavity is arranged in a sinking type radian mode.
3. The mold apparatus for horizontal spin centrifugal casting of grinding balls according to claim 1, wherein: each grinding ball cavity (5) in the mould is arranged on a circumferential line taking the centre of the mould as the center of a circle.
4. The mold apparatus for horizontal spin centrifugal casting of grinding balls according to claim 1, wherein: the grinding ball metal mold assembling device is characterized by further comprising a mold assembling locking through hole (11), a mold assembling locking screw hole (12) and a mold assembling locking nut (10), wherein the grinding ball metal mold upper mold (1) is provided with four mold assembling locking through holes (11), the grinding ball metal mold lower mold (2) is provided with four mold assembling locking screw holes (12), the mold assembling locking through holes (11) correspond to the mold assembling locking screw holes (12) mutually, and the mold assembling locking nut (10) is matched and fixed with the mold assembling locking screw rod (9).
5. The mold apparatus for horizontal spin centrifugal casting of grinding balls according to claim 1, wherein: the cavity of the grinding ball metal mold upper die (1) comprises an upper hemisphere provided with a grinding ball cavity (5), an upper half runner of a grinding ball molten iron injection port through which molten metal enters the grinding ball cavity (5), and upper concave wedge edges at the upper part of the molten iron injection cavity and the edge of the outer circle of the upper die;
the cavity of the grinding ball metal lower die (2) comprises a lower half ball of a grinding ball cavity (5), a lower half runner of a grinding ball molten iron injection port through which molten metal enters the grinding ball cavity (5), and an upper convex wedge edge at the lower part of the molten iron injection cavity and the edge of the outer circle of the lower die.
6. The mold apparatus for horizontal spin centrifugal casting of grinding balls according to claim 1, wherein: the grinding ball grinder also comprises a molten iron injection cavity bayonet height (8), wherein the position of the molten iron injection cavity bayonet height (8) is within +20 mm of the grinding ball radius.
7. The mold apparatus for horizontal spin centrifugal casting of grinding balls according to claim 1, wherein: the mould assembling positioning pins (3), the mould assembling positioning pin holes (4) and the mould assembling locking screw rods (9) are four.
8. The mold apparatus for horizontal spin centrifugal casting of grinding balls according to claim 1, wherein: the centrifugal linear speed range of centrifugal casting is 20-27 m/s.
9. The mold apparatus for horizontal spin centrifugal casting of grinding balls according to claim 1, wherein: and the clearance (H) between the upper concave wedge edge and the upper convex wedge edge of the excircle of the grinding ball metal mold upper die (1) and the grinding ball metal mold lower die (2) is 0.15 mm.
10. The mold apparatus for horizontal spin centrifugal casting of grinding balls according to claim 1, wherein: the molten metal inlet (6) of the grinding ball at the contact position of the molten metal entering the grinding ball cavity runner and the grinding ball is conical, the minimum diameter of the molten metal inlet is related to the size of the grinding ball, and the minimum diameter of the molten metal inlet (6) of the grinding ball of 100 mm is 20 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120654027.8U CN214977556U (en) | 2021-03-31 | 2021-03-31 | Mould device for horizontal rotation centrifugal casting grinding ball |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120654027.8U CN214977556U (en) | 2021-03-31 | 2021-03-31 | Mould device for horizontal rotation centrifugal casting grinding ball |
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| CN214977556U true CN214977556U (en) | 2021-12-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113182501A (en) * | 2021-03-31 | 2021-07-30 | 浙江省机电设计研究院有限公司 | Mold device for horizontal rotation centrifugal casting of grinding ball and grinding ball forming method |
-
2021
- 2021-03-31 CN CN202120654027.8U patent/CN214977556U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113182501A (en) * | 2021-03-31 | 2021-07-30 | 浙江省机电设计研究院有限公司 | Mold device for horizontal rotation centrifugal casting of grinding ball and grinding ball forming method |
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Inventor after: Pan Dongjie Inventor after: Hong Huaze Inventor after: Chu Xianren Inventor after: Liu Fang Inventor after: Xia Xiaojiang Inventor after: Ying Hao Inventor after: Hu Hongbin Inventor after: Gao Qiang Inventor after: Zhu Dan Inventor after: Tang Yao Inventor after: Zhu Guo Inventor after: Lu Zhijian Inventor before: Pan Dongjie Inventor before: Hong Huaze Inventor before: Xia Xiaojiang Inventor before: Ying Hao Inventor before: Hu Hongbin Inventor before: Gao Qiang Inventor before: Zhu Dan Inventor before: Tang Yao Inventor before: Zhu Guo Inventor before: Lu Zhijian |
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Effective date of registration: 20220225 Address after: 310002 No. 87, Yanan Road, Shangcheng District, Zhejiang, Hangzhou Patentee after: ZHEJIANG INSTITUTE OF MECHANICAL & ELECTRICAL ENGINEERING Co.,Ltd. Patentee after: Anshan Weizhen Technology Co., Ltd Address before: 310002 No. 87, Yanan Road, Shangcheng District, Zhejiang, Hangzhou Patentee before: ZHEJIANG INSTITUTE OF MECHANICAL & ELECTRICAL ENGINEERING Co.,Ltd. |