CN107855487B - Centrifugal casting machine - Google Patents
Centrifugal casting machine Download PDFInfo
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- CN107855487B CN107855487B CN201711394267.3A CN201711394267A CN107855487B CN 107855487 B CN107855487 B CN 107855487B CN 201711394267 A CN201711394267 A CN 201711394267A CN 107855487 B CN107855487 B CN 107855487B
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- wall
- sand
- filter
- centrifugal
- shell
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
- B22D13/026—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis the longitudinal axis being vertical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
- B22D13/107—Means for feeding molten metal
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Centrifugal Separators (AREA)
Abstract
The scheme discloses a centrifugal casting machine in the casting field, which comprises a shell, wherein a vertically-placed centrifugal machine is arranged in the shell, the centrifugal machine comprises a base and a rotating barrel, a high-speed motor is arranged on the outer side of the bottom of the rotating barrel, a die mounting seat is arranged on the inner side of the center of the bottom of the rotating barrel, a pouring device is fixedly mounted on the die mounting seat and comprises a pouring post fixed on the die mounting seat, the side wall of the pouring post is communicated with a ceramic die, cooling sand is filled in the rotating barrel, a stabilizing device is arranged on the outer wall of the rotating barrel and comprises a stabilizing frame, a guide wheel is arranged on the outer wall of the stabilizing frame, a guide wheel track matched with the guide wheel is arranged on the outer wall of the rotating barrel, the track is positioned at the same height as the ceramic die, a ceramic tube filled with a, the yield of the casting parts can be effectively improved.
Description
Technical Field
The invention relates to the field of casting, in particular to a centrifugal casting machine.
Background
The centrifugal casting machine is a machine which pours liquid solution into a rotating casting mould, completes filling and solidification forming under the action of centrifugal force and obtains a metal casting; the existing widely used centrifugal casting machine is a horizontal centrifugal casting machine, the horizontal centrifugal casting machine is used for transversely placing a forming die and forming a pipe fitting by adopting high-speed rotation in the vertical direction, the existing centrifugal rotation power is mainly provided by friction force between the outer wall of a centrifugal barrel and a tug, the line contact area is smaller, and the provided friction force is smaller, so that the speed of the existing horizontal centrifugal motion cannot meet the requirement for manufacturing large-sized pipe fittings, the other centrifugal casting machine is a vertical centrifugal casting machine which can provide very high rotating speed, but when the pipe fitting with a larger wall width is formed, the problem that the density of the pipe fitting at a higher position is insufficient due to the influence of gravity is easily caused, and the qualification rate of the common vertical centrifugal machine is lower.
Disclosure of Invention
The invention provides a centrifugal casting machine aiming at the technical problems, and aims to solve the problem that the pipe fitting density of the existing vertical centrifugal casting machine is insufficient.
In order to solve the technical problems, the invention provides the following technical scheme: a centrifugal casting machine comprises a shell, a vertically placed centrifugal machine is arranged in the shell, the centrifugal machine comprises a base and a rotating barrel, a high-speed motor is installed on the outer side of the bottom of the rotating barrel, a mold installation seat is arranged on the inner side of the center of the bottom of the rotating barrel, a pouring device is fixedly installed on the mold installation seat and comprises a pouring gate column fixed on the mold installation seat, a pouring gate filter is connected to the top of the pouring gate column, the side wall of the pouring gate column is communicated with a plurality of ceramic molds which are centrosymmetric with the pouring gate column, cooling sand is filled in the rotating barrel, a stabilizing device is arranged on the outer wall of the rotating barrel and comprises a stabilizing frame connected to the shell through a telescopic hydraulic cylinder, guide wheels are arranged on the outer wall of the stabilizing frame, guide wheel tracks matched with the guide wheels are arranged, the inner wall of the stabilizing frame is provided with an electromagnetic generator which is positioned at the upper periphery and the lower periphery of the ceramic die, and the upper end of the ceramic die is communicated with a ceramic tube filled with a cavitation material.
The working principle of the invention is as follows: when needing centrifuge work, accomplish the installation of mould earlier, will water post fixed mounting on the die holding seat to the ceramic mould is being watered post outer wall, connects simultaneously and waters the filter in watering capital portion, to filling cooling sand in the rotatory bucket, the cooling sand is filled submerge the ceramic mould can. In order to make the rotation stable, before starting the high-speed motor, firstly, low-speed rotation is carried out to ensure that cooling sand can be uniformly filled in the rotary barrel, then the telescopic hydraulic cylinder drives the stabilizing frame to be close to the rotary barrel, so that the guide wheel is matched with the guide wheel track to finish the preparation work, then, conventional electrical inspection and other inspection are carried out, the high-speed motor is started, at the moment, metal liquid can be introduced into the pouring gate filter, the pouring gate filter filters out residual slag in the metal liquid, the metal liquid flows downwards along the pouring gate column at the moment, simultaneously, the metal liquid can be gradually filled in the inner cavity of each ceramic mold under the action of centrifugal force, simultaneously, the electromagnetic generator is started to mold the metal liquid in the ceramic mold, after the molding is finished, the temperature around the ceramic mold is gradually reduced, so that after the metal liquid is primarily solidified, the ceramic mold can be gradually cooled through the, after cooling to 200 ℃, demoulding can be carried out, and centrifugal casting is completed.
The invention has the beneficial effects that 1, the vertical centrifugal casting is adopted, so that the size of a cast part can be increased; 2. the die mounting seat is arranged on the inner side of the center of the bottom of the rotary barrel, so that a die can be replaced according to requirements, and the requirement of multiple production is met; 3. the side wall of the pouring gate column is communicated with a plurality of ceramic molds which are centrosymmetric by the pouring gate column, and a plurality of cast parts can be molded at one time through the rotation of a centrifugal machine; 4. the top of the pouring gate column is connected with a pouring gate filter, so that the final fine filtration of the molten metal is realized, and the molding purity of the cast part can be improved; 5. the rotary barrel is filled with cooling sand, and in the forming process, because ceramic mold conducts heat slower, the metal liquid can get into the ceramic mold inner chamber smoothly earlier, and the cooling sand can play heat retaining effect at first, and after the shaping at back was accomplished, the metal liquid dispels the heat gradually, and the cooling sand is taken away the heat, can carry out the heat exchange to the cooling sand simultaneously, realizes that the heat in the cooling sand looses, reaches the purpose of cooling down gradually like this for the metallographic structure in the casting forms more completely. 6. The stabilizing device comprises a stabilizing frame connected to the shell through a telescopic hydraulic cylinder, a guide wheel is arranged on the outer wall of the stabilizing frame, a guide wheel track matched with the guide wheel is arranged on the outer wall of the rotating barrel, and the rotating barrel of the vertical centrifugal machine is high in height, so that vibration can occur during rotation to cause unstable rotation; 7. the ceramic pipe filled with the pitting corrosion material is introduced into the mold, when molten metal flows into the inner cavity of the ceramic mold, the pitting corrosion material disappears when heated, a space with negative pressure is left, and the molten metal is attracted by the negative pressure to realize the movement of the molten metal to the ceramic pipe, so that the condition that the compactness of the upper part of the cast part is insufficient due to the external gravity is well eliminated.
The following is an optimization of the basic scheme:
further, can circulate and cool off the casting for making the cooling sand, the shell is fixed with into husky mechanism, and the shell bottom is equipped with out husky mechanism, advances husky mechanism including advancing husky screw conveyer, advances husky screw conveyer top and is connected with into husky fill, and the below is fixed with and draws husky pipeline. After casting is finished, the sand inlet mechanism and the sand outlet mechanism are started, so that cooling sand in the rotary barrel is circulated, and a better cooling effect is achieved.
Further, in order to prevent the cooling sand from hardening in the rotary tub, which may result in an insufficient speed of the cooling sand falling, a vibrator is provided in the rotary tub. The purpose of the vibrator is to reduce hardening of the cooling sand and ensure smooth replacement.
Furthermore, the outer wall of the pouring gate column is provided with a temperature compensating pipe. The pouring gate column is insulated through the temperature compensating pipe, so that the metal liquid can keep the fluidity, and the normal casting is ensured.
Further, the filter of watering includes the sprue gate of one-tenth funnel shape, connects the filter tube at the sprue gate, the filter tube outer wall is equipped with the filter residue ball of at least three and filter tube intercommunication, is equipped with the filter screen of slope in the filter tube, the filter residue ball passes through pipe connection border on the filter screen. The molten metal is filtered for at least three times, filter residue is temporarily stored in the filter residue ball, and the filter residue ball is directly replaced after the molten metal is manufactured, so that the cleaning work of the filter residue is reduced.
And finally, the magnetic field of the electromagnetic generator is an adjustable magnetic field of 0-0.2T. This magnetic field range reduces segregation phenomena of the cast component.
Drawings
Fig. 1 is a schematic structural view of a centrifugal casting machine according to the present embodiment.
Detailed Description
The following is further detailed by the specific embodiments:
the reference numbers in the figures list: the device comprises a shell 1, a rotary barrel 2, a pouring gate column 3, a temperature compensating pipe 31, a filter 4, a filter residue ball 41, a guide wheel 5, a ceramic mould 6, a ceramic pipe 61, a telescopic hydraulic cylinder 7, an electromagnetic generator 8, a high-speed motor 9 and a sand outlet mechanism 10.
The centrifugal casting machine shown in figure 1 comprises a shell 1, a vertically placed centrifugal machine is arranged in the shell 1, the centrifugal machine comprises a base, a rotary barrel 2, a high-speed motor 9 is arranged at the center of the bottom of the rotary barrel 2, a mold mounting seat is arranged at the rotation center of the rotary barrel 2, a pouring device is fixedly mounted on the mold mounting seat and comprises a pouring post 3 positioned at the center of the rotary barrel 2, a pouring filter 4 is connected with the upper part of the pouring post 3, the side wall of the pouring post 3 is communicated with a plurality of ceramic molds 6 which are centrosymmetric with the pouring post, cooling sand is filled in the rotary barrel 2, a stabilizing device is arranged on the outer wall of the rotary barrel 2 and comprises a stabilizing frame connected to the shell 1 through a telescopic hydraulic cylinder 7, a guide wheel 5 is arranged on the outer wall of the stabilizing frame, a guide wheel track matched with the guide wheel is arranged, the inner wall of the stabilizing frame is provided with an electromagnetic generator 8 which is arranged above and below the ceramic mould 6, and the upper end of the ceramic mould is provided with a ceramic tube 61 filled with a corrosion eliminating material.
The control system matched with the centrifugal casting machine comprises a photoelectric sensor arranged on the inner wall of the rotating barrel and used for measuring the cooling sand capacity, and a frequency converter arranged in an electric device and used for adjusting the rotating speed of a high-speed motor; the system comprises a pouring gate column, a molten liquid temperature sensor, a cooling sand temperature sensor, an industrial personal computer and a control computer, wherein the molten liquid temperature sensor is arranged in the pouring gate column and used for measuring the temperature of a metal solution; the PLC of setting in the regulator cubicle for the process control that relates to among the control entire system, photoelectric sensor, melt sensor and cooling sand temperature sensor signal of telecommunication are connected at PLC's input, and electromagnetic generator and flexible pneumatic cylinder signal of telecommunication are connected at PLC's output, PLC and converter both way communication, and high-speed motor connects the output at the converter, industrial computer and PLC both way communication.
The cold sand-removing circulating system in the centrifugal casting machine comprises a sand feeding mechanism located above a rotary barrel, a sand discharging mechanism 10 is arranged at the bottom of a shell 1, the sand feeding mechanism comprises a sand feeding spiral feeder, a sand feeding hopper is connected above the sand feeding spiral feeder, a sand guiding pipeline is fixed below the sand feeding spiral feeder, a sand flowing valve which is opened and closed in a rotating mode is arranged below the rotary barrel, the sand guiding pipeline is right below the sand flowing valve, a sand discharging spiral feeder is connected below the sand guiding pipeline, the sand feeding spiral feeder, the sand discharging spiral feeder and a sand flowing valve electric signal are connected to a signal output end of a PLC.
The cooling sand is prevented from flowing unsmoothly in the rotary barrel, and a vibrator is arranged in the rotary barrel. The hardened or piled cooling sand can be smoothly dropped down through the vibrator.
The outer wall is provided with a temperature compensating pipe 31. The pouring gate column 3 is insulated through the temperature compensating pipe 31, so that the metal liquid can keep the fluidity, and the normal casting is ensured. The pouring gate filter 4 comprises a pouring gate shaped like a funnel and is connected with a filter pipe of the pouring gate, the outer wall of the filter pipe is provided with at least three filter residue balls 41 communicated with the filter pipe, an inclined filter screen is arranged in the filter pipe 4, and the filter residue balls 41 are connected with the upper edge of the filter screen through a pipeline. The molten metal is filtered for at least three times, filter residue is temporarily stored in the filter residue ball 41, and after the production is finished, the filter residue ball 41 is directly replaced, so that the cleaning work of the filter residue is reduced.
The magnetic field of the electromagnetic generator is an adjustable magnetic field of 0-0.2T. This magnetic field range reduces segregation phenomena of the cast component.
The whole centrifugal casting process comprises the following steps:
when needing centrifuge work, accomplish ceramic mold 6's installation earlier, will water post 3 fixed mounting on the die holding seat to the ceramic mold is being watered post outer wall, connects simultaneously and waters the filter in watering capital portion, to filling cooling sand in the rotatory bucket, the cooling sand is filled submerge ceramic mold can. In order to make the rotation stable, before starting the high-speed motor, firstly, low-speed rotation is carried out to ensure that cooling sand can be uniformly filled in the rotary barrel, then the telescopic hydraulic cylinder drives the stabilizing frame to be close to the rotary barrel, so that the guide wheel is matched with the guide wheel track to finish the preparation work, then, conventional electrical inspection and other inspection are carried out, the high-speed motor is started, at the moment, metal liquid can be introduced into the pouring gate filter, the pouring gate filter filters out residual slag in the metal liquid, the metal liquid flows downwards along the pouring gate column at the moment, simultaneously, the metal liquid can be gradually filled in the inner cavity of each ceramic mold under the action of centrifugal force, simultaneously, the electromagnetic generator is started to mold the metal liquid in the ceramic mold, after the molding is finished, the temperature around the ceramic mold is gradually reduced, so that after the metal liquid is primarily solidified, the ceramic mold can be gradually cooled through the, after cooling to below 200 ℃, demolding can be carried out, and centrifugal casting is completed.
Claims (5)
1. A centrifugal casting machine characterized by: the centrifugal machine comprises a shell, a vertically placed centrifugal machine is arranged in the shell, the centrifugal machine comprises a base and a rotary barrel, a high-speed motor is installed on the outer side of the bottom of the rotary barrel, a mold mounting seat is arranged on the inner side of the center of the bottom of the rotary barrel, a pouring device is fixedly installed on the mold mounting seat and comprises a pouring gate column fixed on the mold mounting seat, a pouring gate filter is connected to the top of the pouring gate column, the side wall of the pouring gate column is communicated with a plurality of ceramic molds which are centrosymmetric to the pouring gate column, cooling sand is filled in the rotary barrel, a stabilizing device is arranged on the outer wall of the rotary barrel and comprises a stabilizing frame connected to the shell through a telescopic hydraulic cylinder, guide wheels are arranged on the outer wall of the stabilizing frame, guide wheel tracks matched with the guide wheels are arranged on the outer wall of, the electromagnetic generator is positioned at the upper and lower peripheries of the ceramic mould, and the upper end of the ceramic mould is communicated with a ceramic tube filled with a cavitation material.
2. The centrifugal caster according to claim 1, characterized in that: the sand inlet mechanism is fixed on the shell, the sand outlet mechanism is arranged at the bottom of the shell, the sand inlet mechanism comprises a sand inlet screw conveyor, a sand inlet hopper is connected above the sand inlet screw conveyor, and a sand guide pipeline is fixed below the sand inlet screw conveyor.
3. The centrifugal caster according to claim 2, wherein: and a temperature compensating pipe is arranged on the outer wall of the pouring gate column.
4. A centrifugal casting machine according to claim 3, characterized in that: the filter of watering is including the sprue gate that is the funnel shape and the filter tube of connection at the sprue gate, the filter tube outer wall is equipped with the filter residue ball of at least three and filter tube intercommunication, is equipped with the filter screen of slope in the filter tube, the filter residue ball passes through pipe connection border on the filter screen.
5. The centrifugal caster according to claim 4, wherein: the magnetic field of the electromagnetic generator is an adjustable magnetic field of 0-0.2T.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201711394267.3A CN107855487B (en) | 2017-12-21 | 2017-12-21 | Centrifugal casting machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201711394267.3A CN107855487B (en) | 2017-12-21 | 2017-12-21 | Centrifugal casting machine |
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CN107855487A CN107855487A (en) | 2018-03-30 |
CN107855487B true CN107855487B (en) | 2020-04-14 |
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CN201711394267.3A Active CN107855487B (en) | 2017-12-21 | 2017-12-21 | Centrifugal casting machine |
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CN115846610B (en) * | 2023-01-04 | 2024-07-12 | 杭州富生电器有限公司 | Full-automatic six-station rotor core centrifugal casting production line |
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Publication number | Priority date | Publication date | Assignee | Title |
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JPS579572A (en) * | 1980-06-20 | 1982-01-19 | Daido Steel Co Ltd | Casting method |
US4796686A (en) * | 1986-08-20 | 1989-01-10 | Gayso Donald W | Centrifugal casting machine with venturi actuated vacuum venting |
CN1010839B (en) * | 1988-03-27 | 1990-12-19 | 王守忠 | Dynamic cold-hard wear-resistant cast iron ball forming process and equipment |
US6499529B1 (en) * | 2001-08-17 | 2002-12-31 | Hitchiner Manufacturing Co., Inc. | Centrifugal countergravity casting |
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