CN112676551A - Simplified vacuum suction casting process program control electric loop - Google Patents
Simplified vacuum suction casting process program control electric loop Download PDFInfo
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- CN112676551A CN112676551A CN201911008842.0A CN201911008842A CN112676551A CN 112676551 A CN112676551 A CN 112676551A CN 201911008842 A CN201911008842 A CN 201911008842A CN 112676551 A CN112676551 A CN 112676551A
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- suction casting
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- 238000005266 casting Methods 0.000 claims abstract description 58
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 239000004576 sand Substances 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- 230000000694 effects Effects 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 claims 1
- 230000001960 triggered effect Effects 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract 2
- 229910045601 alloy Inorganic materials 0.000 abstract 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 abstract 1
- 235000011613 Pinus brutia Nutrition 0.000 abstract 1
- 241000018646 Pinus brutia Species 0.000 abstract 1
- 230000032683 aging Effects 0.000 abstract 1
- 230000005484 gravity Effects 0.000 abstract 1
- 238000003825 pressing Methods 0.000 description 3
- 230000011664 signaling Effects 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
The simplified vacuum suction casting process program controls an electric loop. In the casting production of high-alloy heat-resistant steel thin-wall castings, when the supercharger volute of the thin-wall castings is filled with mold in the casting of high-alloy heat-resistant steel with poor fluidity, qualified products cannot be obtained by gravity casting, and then vacuum suction casting is adopted, so that the production requirements can be met, but the control program of a used suction casting chamber is as follows: the upper chamber descends → closes the chamber and seals → compresses tightly → opens the vacuum → time delay → stops the vacuum to open the atmosphere → pine type → the upper chamber rises this series of procedures, in use some link very easily takes place, control point and cylinder valve's sealing member receive high temperature gas leakage, joint ageing etc. make the maintenance complicated, often there are few fault points to influence the phenomenon of procedure to take place, now merge some control procedures, reduce control point and carry out the cylinder to the procedure simplification processing, the reduction of trouble makes the availability factor very improve.
Description
Technical Field
The electric loop control program of the vacuum suction casting process is further simplified.
Background
The high-nickel alloy heat-resistant steel turbocharger turbine shell accepted by the company has a wall thickness of only 2.5 mm. The fluidity of the steel casting in the molten state is extremely poor, and the thin-wall mold filling is a technical problem. From 2015, the company tries for antigravity casting process trial production, and after more than three years of exploration, in 2018, an antigravity casting production line with a vacuum suction casting chamber as the center, an upstream matched core-setting conveying line and a downstream matched sand-cleaning polishing conveying line are built.
The electric control programs of the suction casting chamber are respectively as follows: the suction casting upper chamber descends → the chamber is sealed → the pressure mold → the vacuum is opened → the time delay → the vacuum is stopped to open the atmosphere → the loose mold → the upper chamber is loose → the upper chamber ascends.
The pressure relay, the displacement relay, the time relay, the temperature relay and other signaling instruments are adopted to control the action of the intermediate relay, so that the electromagnet drives the valve core to change direction, and the actions of the cylinders such as sealing of the suction casting chamber, compression molding, lifting of the suction casting chamber and the like are controlled.
When in use, a plurality of cylinders, electromagnetic directional valves, relay contacts and various sealing elements are failed and leak due to high temperature of the environment, so that a plurality of fault points are caused, the maintenance workload is large, such as cylinder groups sealed by suction casting chambers and compression type cylinder groups, and particularly, as long as one link fails, the whole process stops running and waits for maintenance.
Disclosure of Invention
The invention aims to combine the connection of each program as much as possible and act simultaneously, thereby reducing the use of a signaling device, simplifying the control link, reducing the use of various relays and leading the process connection to be more compact and reasonable.
The technical scheme is that on the basis of fully observing the site, the main key point is that when vacuum suction casting is carried out, a sand mold and a suction casting chamber can be sealed, so that the negative pressure efficiency is not damaged. The electric control program of the suction casting chamber is as follows: descending the suction casting upper chamber (compacting the sand mold) → opening vacuum (compacting the suction casting upper chamber) → delaying → stopping vacuum and opening atmosphere (loosening the pressure and loosening the upper chamber, and ascending the suction casting chamber). Firstly, the sand mold is mounted in place to send a signal, the suction casting upper chamber descends, the profiling cylinder also descends, the profiling plate simultaneously compresses the sand mold in the descending process, the self weight and the descending pressure of the suction casting upper chamber are greater than the profiling pressure, and the profiling pressure cannot be interfered. When the upper chamber descends to a proper position, the pressure relay sends a signal to open the vacuum valve for suction casting, meanwhile, the suction casting upper chamber is also compressed by the atmosphere and sealed with the outside, when the set time for suction casting is up, the vacuum valve is closed and the atmosphere is communicated, the suction casting upper chamber is lifted, meanwhile, the pressing force of the sand mold is released, and the sand mold after suction casting can be taken out.
(1) An electric control loop:
the power AC220V connects the three loops along the line via fuses R. 1. Connecting sand mold in-place contacts X simultaneously1And an intermediate relay J1Normally open self-protection contact J1-1And a normally closed contact SJ connected to the time relay1-1Meridian passage SJ1-1Connecting intermediate relay J1The coil is connected with the N end of the power supply; 2. connection ofNormally open contact J of intermediate relay1-2Reconnection of time relay SJ1Normally closed contact SJ1-2，SJ1-2Electromagnet DT connected with three branch circuits, electromagnetic change valve1② an electromagnet DT connected with the electromagnetic change valve2Connecting pressure relay YJ1，DJ1、DJ2And YJ1Then the N end of the power supply is connected at the same time; 3. connecting pressure relay YJ1Normally open contact YJ1-1And then connected to the normally closed contact SJ of the time relay1-3，SJ1-3Electromagnet DT for simultaneously connecting electromagnetic directional valves3And time relay SY1，DT3And SY1Simultaneously, the N end of the power supply is connected;
(2) pneumatic control loop
Firstly, the air source is connected with DT through an air source purifier 81An electromagnetic directional valve 4, an air inlet end of the valve 4, an air inlet end connected with an air port at the lower end of an air cylinder 2 of an upper suction casting chamber 2, an air inlet opening at the upper end of the air cylinder 2 of the valve 4, a piston rod of the air cylinder 2 extending out from the lower end to be connected with the top end of the upper suction casting chamber to control the upper chamber to lift, an air source is connected with a pressure regulating valve 7, the valve 7 is connected with a DT2The air inlet end of the electromagnetic directional valve 3 is connected with the lower end pipe orifice of the profiling cylinder 1, the air inlet opening of the valve 3 is connected with the upper end air inlet of the cylinder 1, and the lower end of the piston rod of the cylinder 1 is in floating connection with the profiling plate. Thirdly, the vacuum pump 9 is connected with DT through a vacuum purifier 163The air inlet of the vacuum pipeline valve 5 and the air outlet of the valve 5 communicated with the atmosphere are connected with the suction casting upper chamber 11.
The electrical circuit is simplified, the relay for pressing in place and the cylinder group for sealing the suction casting chamber can be omitted, and some actions such as the upper chamber descending and pressing can be simultaneously completed, so that the time of the whole process is reduced.
Drawings
FIG. 1 is a simplified electrical schematic diagram of a vacuum suction casting process control.
Wherein: 1. profiling cylinder 2, suction casting upper chamber lifting cylinder 3 and profiling cylinder
4. Suction casting upper chamber lifting air valve 5, vacuum opening air valve 6 and pressure relay
7. Pressure regulating valve 8, air source purifier 9, vacuum pump 10 and air compressor
11. Suction casting upper chamber 12, contour plate 13 and valve electromagnet
14. Intermediate relay 15, time relay 16, vacuum cleaner
17. Sand mold in-place signal
Detailed Description
When the suction casting upper chamber 11 is in signal descending process, the descending contour plate 12 can be in contact with the indoor sand mold before the suction casting upper chamber 11 is in contact with the indoor sand mold, when the suction casting upper chamber 11 continues descending, the contour plate 12 continuously compresses the sand mold, after the suction casting upper chamber 11 is in contact with the suction casting lower chamber flange, the pressure rises, the pressure relay 6 sends a signal after reaching a set value, the vacuum pipeline electromagnetic valve 5 is opened to connect the vacuum pipeline to cut off the atmosphere, and meanwhile, the sealing pressure is increased after the outside of the suction casting chamber 11 is subjected to normal atmospheric pressure. The vacuum pipe valve 5 draws the indoor air away to form negative pressure. The sand mold starts to be suction-cast, and the time relay 15 is used for timing, when the set value is reached, the normally closed contact of the time relay 15 is opened simultaneously to cut off the signal. The vacuum pipeline valve 5 is reversed, the vacuum is cut off to connect the atmosphere, simultaneously, the cylinders of the pressure plate 12 and the suction casting upper chamber 11 are reversed, the suction casting upper chamber 11 is opened and the pressure plate 12 is released, the pressure relay 6 is reset, and the suction casting chamber 11 is lifted.
Claims (2)
1. The simplified vacuum suction casting process program control electric loop is characterized in that: when the sand mold in-place signal of the suction casting upper chamber is reduced, the descending pressure plate can contact with the indoor sand mold before the suction casting chamber, in the process that the suction casting upper chamber continues to descend, the pressure plate simultaneously compresses the sand mold, after the suction casting chamber upper chamber contacts with the suction casting chamber lower chamber, the pressure of the descending cylinder rises, the pressure relay is triggered to open the vacuum pipeline electromagnetic valve, the vacuum pipeline is connected to cut off an atmospheric passage, meanwhile, negative pressure gradually becomes in the suction casting chamber, the outside of the suction casting chamber is subjected to atmospheric pressure to enhance the sealing effect, meanwhile, the negative pressure in the chamber starts to suck molten iron for filling, the time relay is timed, when the set filling time and pressure maintaining time are reached, the time relay sends a signal to cut off a normally closed contact in a loop, the vacuum pipeline electromagnetic valve is reversed, the vacuum pipeline is cut off to connect the atmosphere, meanwhile, the suction casting chamber of the pressure plate.
2. The simplified vacuum suction casting process program control electric loop is characterized in that:
(1) an electric control loop:
the power AC220V connects the three loops along the line via fuses R. 1. Connecting sand mold in-place contacts X simultaneously1And an intermediate relay J1Normally open self-protection contact J1-1And a normally closed contact SJ connected to the time relay1-1Meridian passage SJ1-1Connecting intermediate relay J1The coil is connected with the N end of the power supply; 2. normally open contact J for connecting intermediate relay1-2Reconnection of time relay SJ1Normally closed contact SJ1-2，SJ1-2Electromagnet DT connected with three branch circuits, electromagnetic change valve1② an electromagnet DT connected with the electromagnetic change valve2Connecting pressure relay YJ1，DJ1、DJ2And YJ1Then the N end of the power supply is connected at the same time; 3. connecting pressure relay YJ1Normally open contact YJ1-1And then connected to the normally closed contact SJ of the time relay1-3，SJ1-3Electromagnet DT for simultaneously connecting electromagnetic directional valves3And time relay SY1，DT3And SY1Simultaneously, the N end of the power supply is connected;
(2) pneumatic control loop
Firstly, the air source is connected with DT through an air source purifier 81An electromagnetic directional valve 4, an air inlet end of the valve 4, an air inlet end connected with an air port at the lower end of an air cylinder 2 of an upper suction casting chamber 2, an air inlet opening at the upper end of the air cylinder 2 of the valve 4, a piston rod of the air cylinder 2 extending out from the lower end to be connected with the top end of the upper suction casting chamber to control the upper chamber to lift, an air source is connected with a pressure regulating valve 7, the valve 7 is connected with a DT2The air inlet end of the electromagnetic directional valve 3 is connected with the lower end pipe orifice of the profiling cylinder 1, the air inlet opening of the valve 3 is connected with the upper end air inlet of the cylinder 1, and the lower end of the piston rod of the cylinder 1 is in floating connection with the profiling plate. Thirdly, the vacuum pump 9 is connected with DT through a vacuum purifier 163The air inlet of the vacuum pipeline valve 5 and the air outlet of the valve 5 communicated with the atmosphere are connected with the suction casting upper chamber11。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911008842.0A CN112676551A (en) | 2019-10-17 | 2019-10-17 | Simplified vacuum suction casting process program control electric loop |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911008842.0A CN112676551A (en) | 2019-10-17 | 2019-10-17 | Simplified vacuum suction casting process program control electric loop |
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| CN112676551A true CN112676551A (en) | 2021-04-20 |
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| CN201911008842.0A Pending CN112676551A (en) | 2019-10-17 | 2019-10-17 | Simplified vacuum suction casting process program control electric loop |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06182520A (en) * | 1992-10-23 | 1994-07-05 | Toyota Motor Corp | Suction casting method |
| CN108097922A (en) * | 2017-12-20 | 2018-06-01 | 西北工业大学 | A kind of metal-base composites vacuum low-pressure casting device and casting method |
| CN109382498A (en) * | 2017-08-07 | 2019-02-26 | 科华控股股份有限公司 | Suction pouring inhales the pneumatic and electric control loop of casting room |
| CN209006653U (en) * | 2018-09-17 | 2019-06-21 | 天津新伟祥工业有限公司 | Casting device is inhaled in negative pressure |
| CN211727440U (en) * | 2019-10-17 | 2020-10-23 | 科华控股股份有限公司 | Simplified vacuum suction casting process program control electric loop |
-
2019
- 2019-10-17 CN CN201911008842.0A patent/CN112676551A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06182520A (en) * | 1992-10-23 | 1994-07-05 | Toyota Motor Corp | Suction casting method |
| CN109382498A (en) * | 2017-08-07 | 2019-02-26 | 科华控股股份有限公司 | Suction pouring inhales the pneumatic and electric control loop of casting room |
| CN108097922A (en) * | 2017-12-20 | 2018-06-01 | 西北工业大学 | A kind of metal-base composites vacuum low-pressure casting device and casting method |
| CN209006653U (en) * | 2018-09-17 | 2019-06-21 | 天津新伟祥工业有限公司 | Casting device is inhaled in negative pressure |
| CN211727440U (en) * | 2019-10-17 | 2020-10-23 | 科华控股股份有限公司 | Simplified vacuum suction casting process program control electric loop |
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