CN107891136B - Automatic control system of centrifugal casting machine - Google Patents
Automatic control system of centrifugal casting machine Download PDFInfo
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- CN107891136B CN107891136B CN201711394268.8A CN201711394268A CN107891136B CN 107891136 B CN107891136 B CN 107891136B CN 201711394268 A CN201711394268 A CN 201711394268A CN 107891136 B CN107891136 B CN 107891136B
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- rotary barrel
- centrifugal casting
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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
- B22D13/12—Controlling, supervising, specially adapted to centrifugal casting, e.g. for safety reasons
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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
- B22D13/101—Moulds
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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
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/003—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using inert gases
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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
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
Abstract
The application discloses an automatic control system of a centrifugal casting machine in the field of centrifugal casting, which comprises a centrifugal casting machine body and an adjusting mechanism, wherein the adjusting mechanism comprises a heat exchanger which is arranged side by side with an electromagnetic generator, the heat exchanger comprises a first sensor arranged on the inner wall of a rotary barrel, a frequency converter arranged in an electrical cabinet, a second sensor arranged in a pouring gate column, a third sensor arranged in the rotary barrel, an industrial personal computer arranged in the electrical cabinet and a PLC (programmable logic controller) arranged in the electrical cabinet, wherein the first sensor, the second sensor and the third sensor are electrically connected to the input end of the PLC; the centrifugal casting process can be performed in a rhythmic manner, so that the yield of the cast parts is improved.
Description
Technical Field
The invention relates to the field of centrifugal casting, in particular to an automatic control system of 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 currently widely adopted 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 the friction force between the outer wall of a centrifugal barrel and a tug, the line contact area is smaller, the provided friction force is smaller, and the speed of the existing horizontal centrifugal motion cannot meet the requirement for manufacturing a large-sized pipe fitting, while the other centrifugal casting machine is a vertical centrifugal casting machine which can provide a very high rotating speed, but when the pipe fitting with a larger wall width is formed, the pipe fitting is influenced by gravity, the problem that the density of the pipe fitting at a higher position is insufficient is easily caused, the pipe fitting is influenced by temperature and rotation stability, the qualification rate of the general vertical centrifugal machine is lower, so that strict control is needed for each link, it is necessary to introduce a system for the rhythm control of the centrifugal casting machine.
Disclosure of Invention
Aiming at the technical problems, the invention provides an automatic control system of a centrifugal casting machine, which aims to solve the problem of low product yield caused by the disorder of rhythm of a production link of the conventional vertical centrifugal machine.
In order to solve the technical problems, the invention provides the following technical scheme: an automatic control system of a centrifugal casting machine comprises a centrifugal casting machine body and an adjusting mechanism, wherein the centrifugal casting machine body comprises a shell, a vertically-arranged centrifugal machine is arranged in the shell, the centrifugal machine comprises a base, a rotary barrel, a high-speed motor is arranged at the center of the bottom of the rotary barrel, a mold mounting seat is arranged at the center of rotation of the rotary barrel, a pouring device is fixedly mounted on the mold mounting seat, the pouring device comprises a pouring gate column positioned at the center of the rotary barrel, a pouring gate filter is connected above 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 rotary barrel, a stabilizing device is arranged on the outer wall of the rotary barrel, the stabilizing device comprises a stabilizing frame connected onto the shell through a telescopic hydraulic cylinder, guide wheels are arranged on the outer wall of the stabilizing frame, the track is positioned at the equal height position of the ceramic mould, the inner wall of the stabilizing frame is provided with an electromagnetic generator which is positioned above and below the ceramic mould, and the upper end of the ceramic mould is provided with a ceramic tube filled with erosion materials; the adjusting mechanism comprises a heat exchanger which is arranged in parallel with the electromagnetic generator, a first sensor which is arranged on the inner wall of the rotary barrel and used for measuring the cooling sand capacity, and a frequency converter which is arranged in the electric cabinet and used for adjusting the rotating speed of the high-speed motor; a second sensor arranged in the pouring gate column and used for measuring the temperature of the metal solution, a third sensor arranged in the rotary barrel and used for measuring the temperature of the cooling sand, and an industrial personal computer arranged in the electric cabinet and used for data processing and monitoring of the whole system; the PLC is arranged in the electrical cabinet and used for controlling the process control related to the whole system, the first sensor, the second sensor and the third sensor are electrically connected to the input end of the PLC, the electromagnetic generator, the heat exchanger and the telescopic hydraulic cylinder are electrically connected to the output end of the PLC, the PLC is in two-way communication with the frequency converter, the high-speed motor is connected to the output end of the frequency converter, and the industrial personal computer is in two-way communication with the PLC.
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 below 200 ℃, demolding can be carried out, and centrifugal casting is completed.
The invention has the beneficial effects that:
the invention adopts vertical centrifugal casting, which can increase the size of the cast part; 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.
The side wall of the pouring gate column is communicated with a plurality of ceramic molds which are centrosymmetric with the pouring gate column, and a plurality of cast parts can be molded at one time through the rotation of the centrifugal machine.
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 forming purity of the cast part can be improved.
The rotary barrel is filled with cooling sand, and in the forming process, because ceramic mold conducts heat more slowly, during the metal liquid can get into ceramic mold inner chamber earlier smoothly, the cooling sand can play heat retaining effect at first, and after the shaping at the 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.
This scheme is introduced the heat exchanger and is cooled off, because the heat exchanger can take away the heat fast for the metal liquid can condense fast, and the heat exchanger can the temperature regulation, and adjustable temperature makes the metal liquid stop for a long time in the temperature range that metallographic structure formed.
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 rotary barrel, the rotary barrel of the vertical centrifugal machine is high in height, and can vibrate when rotating to cause unstable rotation, and the vibration problem caused by rotation can be eliminated through the stability of the guide wheel track and the guide wheel track, so that the casting success rate is improved.
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 system orderly controls the whole production rhythm through the PLC, processes related data through the industrial personal computer, and saves errors of operation due to the fact that the whole casting process is carried out in a full-automatic mode.
Further, adjustment mechanism still includes the cooling sand circulation unit, and the cooling sand circulation unit is including setting up the rotatory bucket top at the shell top the shell is fixed with into husky mechanism, and the shell bottom is equipped with out husky mechanism, advances husky mechanism and including advancing husky screw feeder, advances husky screw feeder top and is connected with into husky fill, and the below is fixed with draws husky pipeline, rotatory bucket below is provided with the quicksand valve that rotates the opening and shutting, quicksand valve below is just to drawing husky pipeline, draws husky pipeline below and is connected with out husky screw feeder, advances husky screw feeder, goes out husky screw feeder and quicksand valve electric signal connection at PLC's signal output part. After the casting is finished, the sand inlet mechanism and the sand outlet mechanism are started, so that cooling sand in the rotary barrel is circulated, a gradual cooling effect is achieved, and the metallographic structure of a cast part is better.
Further, in order to avoid the unsmooth flow of the cooling sand in the rotary barrel, a vibrator is arranged in the rotary barrel. The hardened or piled cooling sand can be smoothly dropped down through the vibrator.
Furthermore, in order to guarantee the safety and the reliability of control, a first electromagnetic valve is arranged between the telescopic hydraulic cylinder and the PLC, a second electromagnetic valve is arranged between the vibrator and the PLC, and a third electromagnetic valve is arranged between the electromagnetic generator and the PLC.
Furthermore, the quicksand valve is a butterfly valve driven by the steering engine. When the cooling sand is required to be statically cooled, the cooling sand can be directly closed through a steering engine control butterfly valve, the butterfly valve has the advantages of rapid reaction and large sealing area, and is commonly used for sealing large-caliber pipelines, so that the butterfly valve is used at the position, and the flow control can be carried out on the large-flow cooling sand.
Finally, the adjusting mechanism further comprises a nitrogen protection unit, the nitrogen protection unit comprises a nitrogen spray head arranged on the inner wall of the shell, the nitrogen spray head is arranged between the rotary barrel and the shell, a sensor IV is arranged in the shell and used for detecting the nitrogen pressure in the shell, the sensor IV is electrically connected with the signal input end of the PLC, and the nitrogen spray head is connected with the signal output end of the PLC; when the flowing sand is in the static cooling process, the nitrogen collision head is started, so that the inside of the centrifugal machine is filled with nitrogen, the surface of the casting can be oxidized, and meanwhile, the nitrogen further cools the casting.
Drawings
FIG. 1 is a schematic structural view of a centrifugal casting machine according to the present invention;
fig. 2 is a block diagram of a control structure of the automatic control system in the present embodiment.
Detailed Description
The reference numbers in the figures list: the device comprises a shell 1, a rotary barrel 2, a pouring gate column 3, a filter 4, a filter residue ball 41, a guide wheel 5, a ceramic mold 6, a ceramic pipe 61, a telescopic hydraulic cylinder 7, an electromagnetic generator 8, a high-speed motor 9, a sand outlet mechanism 10, a sand inlet mechanism 11, a photoelectric sensor 12, a heat exchanger 13, a sand flowing valve 14, a nitrogen nozzle 15, a vibrator 17, cooling sand 18, a steering engine 19, a base 20 and an electric cabinet 21.
As shown in fig. 1 and fig. 2, an automatic control system of a centrifugal casting machine comprises a centrifugal casting machine body and an adjusting mechanism, the centrifugal casting machine body comprises a shell 1, a vertically placed centrifugal machine is arranged inside the shell 1, the centrifugal machine comprises a base 20, a rotating barrel 2, a high-speed motor 9 is installed at the center of the bottom of the rotating barrel 2, a mold mounting seat is arranged at the rotating center of the rotating barrel 2, a pouring device is fixedly installed on the mold mounting seat, the pouring device comprises a pouring post 3 positioned at the center of the rotating barrel 2, a pouring filter 4 is connected above the pouring post 3, the side wall of the pouring post 3 is communicated with a plurality of ceramic molds 6 which are in central symmetry with the pouring post, cooling sand 18 is filled in the rotating barrel 2, a stabilizing device is arranged on the outer wall of the rotating barrel 2, the stabilizing device comprises a stabilizing frame connected to the shell 1, the outer wall of the rotary barrel 2 is provided with a guide wheel track matched with the guide wheel, the track is positioned at the equal height position of the ceramic mould 6, the inner wall of the stabilizing frame is provided with an electromagnetic generator 8 which is positioned above and below the ceramic mould, and the upper end of the ceramic mould 6 is provided with a ceramic tube 61 filled with erosion materials; the adjusting mechanism comprises a heat exchanger 13 which is arranged in parallel with the electromagnetic generator 8, a photoelectric sensor 12 which is arranged on the inner wall of the rotary barrel 2 and is used for measuring the cooling sand capacity, and a frequency converter which is arranged in the electric cabinet 21 and is used for adjusting the rotating speed of the high-speed motor 9; a melt temperature sensor arranged in the pouring gate column 3 and used for measuring the temperature of the metal solution, a cooling sand temperature sensor arranged in the rotary barrel 2 and used for measuring the temperature of the cooling sand, and an industrial personal computer arranged in the electrical cabinet 21 and used for data processing and monitoring of the whole system; the PLC of setting in regulator cubicle 21 for the process control who relates to among the control entire system, photoelectric sensor 12, cooling sand temperature sensor and melt temperature sensor signal connection are at PLC's input, and electromagnetic generator, heat exchanger and flexible pneumatic cylinder signal connection are 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.
Adjustment mechanism still includes the cooling sand circulation unit, the cooling sand circulation unit is fixed with into husky mechanism 11 including the rotatory 2 top shells of bucket that set up at 1 top of shell, 1 bottom of shell is equipped with out husky mechanism 10, it includes into husky screw feeder to advance husky mechanism, it is connected with into husky fill to advance husky screw feeder top, the below is fixed with draws husky pipeline, rotatory bucket below is provided with the quicksand valve that rotates the opening and shutting, quicksand valve below is just to drawing husky pipeline, draw husky pipeline below and be connected with out husky screw feeder, advance husky screw feeder, go out husky screw feeder and the 14 signal output part of signal connection at PLC of quicksand valve.
The cooling sand is prevented from flowing unsmoothly in the rotary barrel, and a vibrator 17 is arranged in the rotary barrel. The hardened or piled cooling sand can be smoothly dropped by the vibrator 17.
The safety and the reliability of control are guaranteed, a first electromagnetic valve is arranged between the telescopic hydraulic cylinder 7 and the PLC, a second electromagnetic valve is arranged between the vibrator 17 and the PLC, and a third electromagnetic valve is arranged between the electromagnetic generator 8 and the PLC.
The quicksand valve 14 is a butterfly valve driven by the steering engine 19. When the cooling sand is required to be statically cooled, the butterfly valve can be directly controlled to be closed through the steering engine 19, the butterfly valve has the advantages of rapid response and large sealing area, and is commonly used for sealing a large-diameter pipeline, so that the butterfly valve is used at the position, and the flow control can be performed on the large-flow cooling sand.
The adjusting mechanism further comprises a nitrogen protection unit, the nitrogen protection unit comprises a nitrogen spray nozzle 15 arranged on the inner wall of the shell 1, the nitrogen spray nozzle 15 is arranged between the rotary barrel 2 and the shell 1, a nitrogen pressure sensor is arranged in the shell and used for detecting the nitrogen pressure in the shell, the four sensors are electrically connected with a signal input end of the PLC, and the nitrogen spray nozzle is connected with a signal output end of the PLC; when the flowing sand is in the static cooling process, the nitrogen collision head is started, so that the inside of the centrifugal machine is filled with nitrogen, the surface of the casting can be oxidized, and meanwhile, the nitrogen further cools the casting.
The whole control flow is as follows:
when needing centrifuge work, the manual installation of accomplishing the 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, the low-speed rotation is firstly carried out to ensure that the 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 complete the preparation work,
reading initial values of a nitrogen pressure sensor, a molten liquid temperature sensor and a cooling sand temperature sensor, wherein the molten liquid temperature sensor can be used for measuring by adopting a heat conducting rod which is cooled in equal proportion, and if the current measuring range is 0-300 ℃, a color temperature meter can be used for measuring the radiation light of the metal solution; the using range of the cooling sand temperature sensor is only 0-200 ℃; the selection of the specific model can be configured according to the actual situation. The initial value is compared with a centrifugal manufacturing process database stored in an industrial personal computer, and only a few key data such as the temperature of metal liquid, the rated rotating speed of a high-speed motor, the preset rotating time, the volume of cooling sand in a rotating barrel and the volume of nitrogen are listed in the figure. After comparison, conventional electrical inspection and the like are carried out, and meanwhile, the current configuration picture is displayed on the touch screen under field control, so that the simulated working state can be visually seen.
Start the high-speed motor through start button, the converter is controlled the rotational speed of motor simultaneously, give PLC with the value transmission of rotational speed simultaneously, after the high-speed motor rotational speed is steady, just can be to leading-in metal liquid in the filter of watering, the filter of watering filters remaining dregs in with the metal liquid, the metal liquid flows downwards along watering the post this moment, simultaneously under the effect of centrifugal force, the metal liquid will fill up gradually in every ceramic mold inner chamber, start electromagnetism generator simultaneously, the metal liquid to in the ceramic mold is moulded, after the shaping is accomplished, cool down around the ceramic mold gradually, make the metal liquid after the primary set, start into husky mechanism and go out husky mechanism, make the cooling sand in the rotatory bucket obtain the circulation, reach the effect of gradually cooling, make the metallographic structure of cast member form better. After cooling to below 200 ℃, just can carry out the drawing of patterns, PLC control flexible pneumatic cylinder drives the steady rest and moves back, directly strikes ceramic mold again for ceramic mold breaks and realizes the drawing of patterns, and PLC control nitrogen gas shower nozzle fills nitrogen 30 minutes and realizes nitrogen protection this moment, guarantees the surface toughness of cast member, and whole process accomplishes centrifugal casting.
Claims (5)
1. The utility model provides a centrifugal casting machine automatic control system, includes centrifugal casting organism and adjustment mechanism, its characterized in that: the centrifugal casting machine body comprises a shell, a vertically placed centrifugal machine is arranged in the shell, the centrifugal machine comprises a base, a rotary barrel, a high-speed motor is arranged at the center of the bottom of the rotary barrel, a mold mounting seat is arranged at the rotation center of the rotary barrel, a pouring device is fixedly mounted on the mold mounting seat and comprises a pouring gate column positioned at the center of the rotary barrel, a pouring gate filter is connected above the pouring gate column, the side wall of the pouring gate column is communicated with a plurality of ceramic molds which are centrosymmetric by 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, 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 inner wall of the stabilizing frame is provided with electromagnetic generators positioned at the upper periphery and the lower periphery of the ceramic mould, and the upper end of the ceramic mould is provided with a ceramic tube filled with erosion materials; the adjusting mechanism comprises a heat exchanger which is arranged in parallel with the electromagnetic generator and a first sensor which is arranged on the inner wall of the rotary barrel and is used for measuring the volume of the cooling sand; the frequency converter is arranged in the electric cabinet and used for adjusting the rotating speed of the high-speed motor; the second sensor is arranged in the pouring gate column and used for measuring the temperature of the metal solution; a third sensor arranged in the rotary barrel and used for measuring the temperature of the cooling sand; the industrial personal computer is arranged in the electric cabinet and is used for data processing and monitoring of the whole system; the PLC is arranged in the electrical cabinet and is used for controlling the process control related to the whole system; the sensor I, the sensor II and the sensor III are in electric signal connection with the input end of the PLC, the electromagnetic generator, the heat exchanger and the telescopic hydraulic cylinder are in electric signal connection with the output end of the PLC, the PLC is in two-way communication with the frequency converter, the high-speed motor is connected with the output end of the frequency converter, and the industrial personal computer is in two-way communication with the PLC.
2. The automatic control system of the centrifugal casting machine according to claim 1, wherein: adjustment mechanism still includes the cooling sand circulation unit, and the cooling sand circulation unit is fixed with into husky mechanism including setting up the rotatory bucket at the shell top on the shell, and the shell bottom is equipped with out husky mechanism, advances husky mechanism including advancing husky spiral feeder, advances husky spiral feeder top and is connected with into husky fill, and the below is fixed with draws husky pipeline, rotatory bucket below is provided with rotates the quicksand valve that opens and shuts, quicksand valve below is just drawing husky pipeline, draws husky pipeline below and is connected with out husky spiral feeder, advances husky spiral feeder, goes out husky spiral feeder and quicksand valve electric signal connection at PLC's signal output part.
3. The automatic control system of the centrifugal casting machine according to claim 2, wherein: a vibrator is installed in the rotary barrel.
4. The automatic control system of the centrifugal casting machine according to claim 3, wherein: a first electromagnetic valve is arranged between the telescopic hydraulic cylinder and the PLC, a second electromagnetic valve is arranged between the vibrator and the PLC, and a third electromagnetic valve is arranged between the electromagnetic generator and the PLC.
5. The automatic control system of the centrifugal casting machine according to claim 4, wherein: the quicksand valve is a butterfly valve driven by the steering engine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711394268.8A CN107891136B (en) | 2017-12-21 | 2017-12-21 | Automatic control system of centrifugal casting machine |
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| CN201711394268.8A CN107891136B (en) | 2017-12-21 | 2017-12-21 | Automatic control system of centrifugal casting machine |
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| CN107891136A CN107891136A (en) | 2018-04-10 |
| CN107891136B true CN107891136B (en) | 2020-04-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109088576B (en) * | 2018-08-06 | 2024-01-30 | 浙江冠南能源科技有限公司 | Universal variable frequency speed regulating equipment and operation method thereof |
| CN109317649A (en) * | 2018-12-18 | 2019-02-12 | 徐州市华茂铸造有限公司 | A kind of method that steel-casting is quickly cooled down break away from moulds |
| CN112355266A (en) * | 2020-10-16 | 2021-02-12 | 青阳县乐旺配件制造有限公司 | Variable-frequency centrifugal casting method |
| CN113976850A (en) * | 2021-10-29 | 2022-01-28 | 林翔 | High-efficient heat radiation structure of centrifugal casting machine |
Family Cites Families (4)
| 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 shaping technology of antiwear chilled cast iron ball and apparatus thereof |
| US6499529B1 (en) * | 2001-08-17 | 2002-12-31 | Hitchiner Manufacturing Co., Inc. | Centrifugal countergravity casting |
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Effective date of registration: 20201026 Address after: 221132 Luzhuang village, Dawu Town, Jiawang District, Xuzhou City, Jiangsu Province Patentee after: Xuzhou Wanming Precision Casting Co.,Ltd. Address before: 400039 Chongqing Jiulongpo Branch City Road No. 68, No. 33-1 Patentee before: CHONGQING MATHESON TECHNOLOGY Co.,Ltd. |
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