CN117583579A - Extrusion device and method for quantitative transfusion light alloy - Google Patents
Extrusion device and method for quantitative transfusion light alloy Download PDFInfo
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- CN117583579A CN117583579A CN202311374436.2A CN202311374436A CN117583579A CN 117583579 A CN117583579 A CN 117583579A CN 202311374436 A CN202311374436 A CN 202311374436A CN 117583579 A CN117583579 A CN 117583579A
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- 238000001125 extrusion Methods 0.000 title claims abstract description 36
- 229910001234 light alloy Inorganic materials 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 50
- 238000005266 casting Methods 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims abstract description 6
- 239000007924 injection Substances 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims description 58
- 239000002184 metal Substances 0.000 claims description 58
- 238000003723 Smelting Methods 0.000 claims description 47
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000001802 infusion Methods 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 6
- 239000000110 cooling liquid Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims 3
- 210000001503 joint Anatomy 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 229910001338 liquidmetal Inorganic materials 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/08—Controlling, supervising, e.g. for safety reasons
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
- B22D29/04—Handling or stripping castings or ingots
- B22D29/06—Strippers actuated by fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D39/00—Equipment for supplying molten metal in rations
Abstract
The invention discloses an extrusion device and an extrusion method for quantitative transfusion light alloy; the device comprises a quantitative transfusion system, a hydraulic machine, a die, a stroke control device, a die temperature machine and a protective gas device, wherein the die is arranged on the hydraulic machine; the die comprises an upper die, a lower die and a push rod; the upper die can move up and down along with an upper cylinder of the hydraulic machine, and the ejector rod can move up and down along with an ejection cylinder of the hydraulic machine; the upper end of the ejector rod is in clearance fit in a charging barrel of the lower die, a side rod is connected in the radial direction of the ejector rod, penetrates through the strip-shaped guide slotted hole, and starts the hydraulic press, and the side rod moves up and down along the strip-shaped guide slotted hole; a cooling channel is arranged in the ejector rod; the invention realizes quantitative transfusion of the light alloy and extrusion forming of the liquid metal by controlling the increment frequency and the delay injection time of the liquid pump. The method has the advantages of green and environment-friendly smoke-free working process, and improved forming quality and production efficiency of castings.
Description
Technical Field
The invention relates to the field of metal extrusion casting, in particular to an extrusion device and an extrusion method for quantitative transfusion light alloy.
Background
The nonferrous light alloy comprises magnesium alloy, aluminum alloy and the like, and has the characteristics of small density, high specific strength and specific rigidity, corrosion resistance and the like. Along with the gradual prominence of energy, resources and environmental problems, the nonferrous light alloy materials represented by aluminum alloy and magnesium alloy are increasingly widely applied, and have important application in the fields of aerospace, ships, automobiles, electronics, daily necessities and the like.
The extrusion casting is a casting process method integrating casting and forging characteristics, and the produced casting has fine crystal grains, high density and good mechanical property. When extrusion casting is carried out, manual die opening casting is usually carried out only by experience or quantitative casting ladle and the like, quantitative casting cannot be realized, the labor intensity is high, the obtained product cannot ensure the dimensional accuracy, the production efficiency is low, and the product is easy to produce coiled air oxidation and is not suitable for large-scale mechanized production.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art and provide a device and a method for extruding quantitative transfusion light alloy. The invention can realize quantitative transfusion pouring of light alloy and extrusion forming of liquid metal.
The invention is realized by the following technical scheme:
the extrusion device for quantitative transfusion light alloy comprises a quantitative transfusion system 110, a hydraulic press 120 and a die 130, wherein the die 130 is arranged on the hydraulic press 120;
the quantitative transfusion system 110 comprises a smelting furnace body 112 and a liquid pump 113;
a smelting chamber 1121 is arranged in the smelting furnace body 112, and a liquid pump interface 1122 and a feeding port 1123 are arranged at the top of the smelting furnace body 112; a metal ingot is placed into a smelting chamber 1121 through a feed port 1123, and after the smelting chamber 1121 is heated to the melting point of the metal ingot, the metal ingot is melted into molten metal;
the liquid pump 113 comprises a pump body 1131, a pump inlet 1132, a pump outlet 1133 and a pouring tube joint 1134, and the liquid pump 113 is connected with the smelting furnace body 112 through a liquid pump interface 1122; a pump inlet 1132 and a pump outlet 1133 are located within the smelting chamber 1121;
the mold 130 includes an upper mold 131, a lower mold 132, and a jack 133;
the upper die 131 can move up and down along with an upper cylinder of the hydraulic machine 120, and the ejector rod 133 can move up and down along with an ejector cylinder of the hydraulic machine 120;
the upper part of the charging barrel of the lower die 132 is provided with a hemispherical pouring gate 1321, and the lower part is provided with two symmetrically distributed strip-shaped guide slotted holes 1322; the pump outlet 1133 is communicated with the hemispherical pouring gate 1321 through a pouring tube 114;
the upper end of the ejector rod 133 is in clearance fit in the barrel of the lower die 132, a side rod 1331 is connected in the radial direction of the ejector rod 133, the side rod 1331 penetrates through the strip-shaped guide slotted hole 1322, the hydraulic press 120 is started, and the side rod 1331 moves up and down along the strip-shaped guide slotted hole 1322;
a cooling channel 1332 is arranged in the ejector rod 133, and the cooling channel 1332 is connected with an external cooling liquid (gas) circulating device 170 through a pipeline;
the lower die 132 further includes a stroke control device 160 for controlling the up-and-down movement of the ejector pins 133; the travel control device 160 includes a stand 161, a lower proximity switch 162, and an upper proximity switch 163, the lower proximity switch 162 and the upper proximity switch 163 being respectively located at upper and lower portions of the stand 161; the side lever 1331 is located between the lower proximity switch 162 and the upper proximity switch 163;
when the ejector rod 133 moves up and down, the side rod 1331 is driven to move up and down along with the movement;
when the side lever 1331 contacts the lower proximity switch 162, the jack 133 stops moving downward;
when the side lever 1331 contacts the upper proximity switch 163, the ejector 133 closes the hemispherical gate 1321, and the ejector 133 stops moving upward, and at the same time, the liquid pump 113 stops delivering the molten metal.
One end of the pouring tube 114 is a pouring nozzle 1141, and the other end is a pouring tube inlet 1142;
the outlet contour of the pouring nozzle 1141 is hemispherical and is connected with a hemispherical pouring gate 1321 on the barrel of the lower die 132, and the pouring pipe inlet 1142 is connected with the pump outlet 1133 of the liquid pump 113;
during operation of the liquid pump 113, molten metal flows along the direction from the pump inlet 1132 to the pump outlet 1133, and the liquid level of the molten metal at least exceeds the joint between the pouring tube inlet 1142 and the pump outlet 1133, so that the molten metal flowing out of the pump outlet 1133 can enter the pouring tube 114 and be fed into the barrel of the lower die 132.
When the operating frequency of the liquid pump 113 is the hovering frequency, the molten metal entering the pouring pipe 114 is hovered near the outlet of the pouring nozzle 1141, so that the molten metal is stabilized in a state to be flown out;
when an increment frequency is added to the liquid pump 113, the actual pouring frequency of the liquid pump 113 is the hovering frequency+the increment frequency, the molten metal flows out from the pouring nozzle 1141, the molten metal outflow rate is the increment frequency×the working time under the frequency, and the pouring rate is controlled by controlling the increment frequency and the working time, so that the quantitative conveying of the molten metal is realized.
The extrusion device further comprises a die temperature machine 140; the mold temperature machine 140 is connected to the mold 130 through a pipe line, and is used for uniformly heating the mold cavity of the mold 130.
The extrusion device further comprises a shielding gas device 115; the shielding gas device 115 is used for introducing shielding gas into the smelting chamber 1121 through a gas pipe; the shielding gas device 115 is turned on when the smelting chamber 1121 temperature exceeds 350 ° or 400 °; closing when the smelting chamber 1121 temperature is below 350 ° or 400 °.
The pouring nozzle 1141 is connected with the hemispherical pouring gate 1321, specifically, the locking device 150 is adopted to realize connection;
the locking device 150 comprises a hoop consisting of a cross rod 151 and two screws 152, and the hoop is sleeved on a charging barrel of the lower die 132; the end of the pouring nozzle 1141 is provided with two symmetrical connecting blocks 1143, and two screws 152 respectively pass through the cross rod 151 and the connecting holes on the connecting blocks 1143; after the nozzle 1141 is docked with the hemispherical gate 1321, nuts on the two screws 152 are locked, thereby locking the nozzle 1141 in connection with the hemispherical gate 1321 of the lower mold 132.
The body of the pouring tube 114 is sleeved in the pouring tube joint 1134 so as to be fixed with the smelting furnace body 112.
The outer layer of the pouring tube 114 is provided with a heating element for heating the pouring tube 114 to a required temperature and an insulating layer for insulating the heated pouring tube 114.
The smelting furnace body 112 is arranged on the track frame 111; wheels are arranged between the bottom of the smelting furnace body 112 and the track frame 111.
The operation method of the extrusion device comprises the following steps:
s1, step: smelting chamber 1121 and pour tube 114 are warmed to a set temperature;
s2, step: adjusting the operating frequency of the liquid pump 113 to a hover frequency in preparation for starting casting;
s3, step: starting pouring, increasing the working frequency of the liquid pump 113 to the actual pouring frequency, allowing molten metal to flow into the charging barrel from the pouring nozzle 1141, enabling the ejector rod 133 to move upwards after a delay injection time, enabling the working frequency of the liquid pump 113 to become a hovering frequency when the side rod 1331 is in upward contact with the upper proximity switch 163, stopping pouring, enabling the ejector rod 133 to move upwards, and stopping jacking after the set time is reached;
s4, step: raising the upper die 131 and the upper ejector rod 133, and ejecting the extruded casting;
s5, step: lowering the ram 133 to contact the lower proximity switch 162 and lowering the upper die 131 to close the mold;
s6, step: repeating the steps S3 to S5.
Compared with the prior art, the invention has the following advantages and effects:
according to the extrusion device for quantitative transfusion light alloy, the control of the pouring quantity of molten metal is realized by controlling the increment frequency and the delay injection time of the liquid pump, and quantitative transfusion is realized;
according to the invention, through the arrangement of the stroke control device, collision between the side rod and the charging barrel of the lower die is avoided, and meanwhile, pumping out of molten metal is controlled, so that the molten metal which does not enter the die flows back in time, and solidification of the molten metal at the pouring nozzle is effectively avoided, so that the pouring nozzle is blocked.
The invention adopts the locking device to lock the connection between the mould and the quantitative transfusion system, and is convenient for the installation and the disassembly of the quantitative transfusion system by matching with the movement of the furnace body on the track frame.
The invention realizes uniform heating of the die cavity by the die temperature machine and is beneficial to the filling of molten metal.
According to the invention, the cooling liquid (gas) is introduced into the ejector rod to cool the ejector rod, so that the heat at the upper end of the ejector rod is taken away, the degree of thermal expansion of the ejector rod is reduced, and the occurrence of clamping is avoided.
The invention realizes quantitative transfusion of light alloy and extrusion forming of liquid metal, has good extrusion casting forming effect and good mechanical property, and ensures consistency of casting quality of different batches; the degree of automation is higher, the production efficiency of the casting is improved, no smoke dust is generated in the working process, and the casting is environment-friendly.
Drawings
FIG. 1 is a schematic structural view of an extrusion device for quantitative infusion of light alloy according to the present invention;
FIG. 2 is a schematic cross-sectional view of a pump according to the present invention;
FIG. 3 is a schematic view of the construction of the pour tube of the present invention;
FIG. 4 is a schematic diagram of the structure of the die and hydraulic press of the present invention;
FIG. 5 is a schematic cross-sectional view of the locking device, mold, and pour tube of the present invention;
fig. 6 is a schematic view of the structure of the ejector pin of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
As shown in fig. 1-6. The invention discloses an extrusion device for quantitative transfusion light alloy, which comprises a quantitative transfusion system 110, a hydraulic press 120 and a die 130, wherein the die 130 is arranged on the hydraulic press 120;
the quantitative transfusion system 110 comprises a smelting furnace body 112 and a liquid pump 113;
a smelting chamber 1121 is arranged in the smelting furnace body 112, and a liquid pump interface 1122 and a feeding port 1123 are arranged at the top of the smelting furnace body 112; a metal ingot is placed into a smelting chamber 1121 through a feed port 1123, and after the smelting chamber 1121 is heated to the melting point of the metal ingot, the metal ingot is melted into molten metal;
the liquid pump 113 comprises a pump body 1131, a pump inlet 1132, a pump outlet 1133 and a pouring tube joint 1134, and the liquid pump 113 is connected with the smelting furnace body 112 through a liquid pump interface 1122; a pump inlet 1132 and a pump outlet 1133 are located within the smelting chamber 1121;
the mold 130 includes an upper mold 131, a lower mold 132, and a jack 133;
the upper die 131 can move up and down along with an upper cylinder of the hydraulic machine 120, and the ejector rod 133 can move up and down along with an ejector cylinder of the hydraulic machine 120;
the upper part of the charging barrel of the lower die 132 is provided with a hemispherical pouring gate 1321, and the lower part is provided with two symmetrically distributed strip-shaped guide slotted holes 1322; the pump outlet 1133 is communicated with the hemispherical pouring gate 1321 through a pouring tube 114;
the upper end of the ejector rod 133 is in clearance fit in the barrel of the lower die 132, a side rod 1331 is connected in the radial direction of the ejector rod 133, the side rod 1331 penetrates through the strip-shaped guide slotted hole 1322, the hydraulic press 120 is started, and the side rod 1331 moves up and down along the strip-shaped guide slotted hole 1322;
a cooling channel 1332 is arranged in the ejector rod 133, and the cooling channel 1332 is connected with an external cooling liquid circulation device 170 through a pipeline; in the extrusion process, the upper end of the ejector rod 133 contacted with the high-temperature molten metal is thermally expanded to reduce the gap between the ejector rod 133 and the feed cylinder of the lower die 132, so that the clamping is easy to cause, and the heat at the upper end of the ejector rod 133 can be taken away by circulating the cooling liquid (air), so that the thermal expansion degree of the ejector rod is reduced, and the clamping is avoided.
The lower die 132 further includes a stroke control device 160 for controlling the up-and-down movement of the ejector pins 133; the travel control device 160 includes a stand 161, a lower proximity switch 162, and an upper proximity switch 163, the lower proximity switch 162 and the upper proximity switch 163 being respectively located at upper and lower portions of the stand 161; the side lever 1331 is located between the lower proximity switch 162 and the upper proximity switch 163;
when the ejector rod 133 moves up and down, the side rod 1331 is driven to move up and down along with the movement;
when the side lever 1331 contacts the lower proximity switch 162, the jack 133 stops moving downward;
when the side lever 1331 contacts the upper proximity switch 163, the ejector 133 closes the hemispherical gate 1321, and the ejector 133 stops moving upward, and at the same time, the liquid pump 113 stops delivering the molten metal.
Because the molten metal is easily solidified when the molten metal contacts the mold 130 and encounters the cooler mold 130, the travel control device 160 is used for controlling the pumping of the molten metal, so that the molten metal which does not enter the mold 130 can be refluxed in time, and the situation that the molten metal is solidified at the pouring nozzle 1141 to block the pouring nozzle 1141 is effectively avoided.
One end of the pouring tube 114 is a pouring nozzle 1141, and the other end is a pouring tube inlet 1142;
the outlet contour of the pouring nozzle 1141 is hemispherical and is connected with a hemispherical pouring gate 1321 on the barrel of the lower die 132, and the pouring pipe inlet 1142 is connected with the pump outlet 1133 of the liquid pump 113;
during operation of the liquid pump 113, molten metal flows along the direction from the pump inlet 1132 to the pump outlet 1133, and the liquid level of the molten metal at least exceeds the junction of the pouring tube inlet 1142 and the pump outlet 1133, and the molten metal flowing out of the pump outlet 1133 can enter the pouring tube 114 and be fed into the barrel of the lower die 132.
When the operating frequency of the liquid pump 113 is the hovering frequency, the molten metal entering the pouring pipe 114 is hovered near the outlet of the pouring nozzle 1141, so that the molten metal is stabilized in a state to be flown out;
when an increment frequency is added to the liquid pump 113, the actual pouring frequency of the liquid pump 113 is the hover frequency+the increment frequency, the molten metal flows out from the pouring nozzle 1141, the molten metal outflow rate is the increment frequency×the working time under the frequency, the pouring rate is controlled by controlling the increment frequency and the working time, the quantitative conveying of the molten metal is realized, and the defects of gas reeling and the like caused by severe change of the molten metal speed are effectively reduced.
The extrusion device further comprises a die temperature machine 140; the mold temperature machine 140 is connected to the mold 130 through a pipe line, and is used for uniformly heating the mold cavity of the mold 130.
The extrusion device further comprises a shielding gas device 115; the shielding gas device 115 is used for introducing shielding gas into the smelting chamber 1121 through a gas pipe; the shielding gas device 115 is turned on when the smelting chamber 1121 temperature exceeds 350 ° or 400 °; closing when the smelting chamber 1121 temperature is below 350 ° or 400 °. The shielding gas is introduced into the smelting chamber 1121 to protect the smelting chamber, so that not only is the oxidation and combustion of molten metal prevented, but also the consumption of shielding gas is reduced.
The pouring nozzle 1141 is connected with the hemispherical pouring gate 1321, specifically, the locking device 150 is adopted to realize connection;
the locking device 150 comprises a hoop consisting of a cross rod 151 and two screws 152, and the hoop is sleeved on a charging barrel of the lower die 132; the end of the pouring nozzle 1141 is provided with two symmetrical connecting blocks 1143, and two screws 152 respectively pass through the cross rod 151 and the connecting holes on the connecting blocks 1143; after the nozzle 1141 is docked with the hemispherical gate 1321, nuts on the two screws 152 are locked, thereby locking the nozzle 1141 in connection with the hemispherical gate 1321 of the lower mold 132.
The body of the pouring tube 114 is sleeved in the pouring tube joint 1134 so as to be fixed with the smelting furnace body 112.
The outer layer of the casting tube 114 is provided with a heating element for heating the casting tube 114 to a desired temperature (about 800 deg.c) and an insulation layer for insulating the heated casting tube 114. The insulation layer typically employs insulation fibers to enhance the insulation of the pour tube 114.
The smelting furnace body 112 is arranged on the track frame 111; wheels are arranged between the bottom of the smelting furnace body 112 and the track frame 111.
In addition, in order to better exhaust the gas in the cavities of the upper die 131 and the lower die 132, a circle of overflow grooves and 6-12 exhaust grooves which are vertically connected to the overflow grooves can be formed around the cavities of the upper die 131 and the lower die 132, and the two exhaust grooves are mutually matched, so that the gas in the cavities can be better and rapidly led out.
The operation method of the extrusion device comprises the following steps:
s1, step: smelting chamber 1121 and pour tube 114 are warmed to a set temperature;
s2, step: adjusting the operating frequency of the liquid pump 113 to a hover frequency in preparation for starting casting;
s3, step: starting pouring, increasing the working frequency of the liquid pump 113 to the actual pouring frequency, allowing molten metal to flow into the charging barrel from the pouring nozzle 1141, enabling the ejector rod 133 to move upwards after a delay injection time, enabling the working frequency of the liquid pump 113 to become a hovering frequency when the side rod 1331 is in upward contact with the upper proximity switch 163, stopping pouring, enabling the ejector rod 133 to move upwards, and stopping jacking after the set time is reached;
s4, step: raising the upper die 131 and the upper ejector rod 133, and ejecting the extruded casting;
s5, step: lowering the ram 133 to contact the lower proximity switch 162 and lowering the upper die 131 to close the mold;
s6, step: repeating the steps S3 to S5.
The above-mentioned delay injection time is the time between the increase of the pumping frequency (pumping out of the molten metal) and the start of the ejection of the ejector pin, and can be set to 2.8s (which can be changed), thereby changing the amount of the molten metal pumped into the mold because the gate is not yet sealed when the ejector pin starts to be ejected.
As described above, the present invention can be preferably realized.
The embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principles of the invention should be made and equivalents should be construed as falling within the scope of the invention.
Claims (10)
1. The extrusion device for quantitative transfusion light alloy comprises a quantitative transfusion system (110), a hydraulic machine (120) and a die (130), wherein the die (130) is arranged on the hydraulic machine (120); the method is characterized in that:
the quantitative transfusion system (110) comprises a smelting furnace body (112) and a liquid pump (113);
a smelting chamber (1121) is arranged in the smelting furnace body (112), and a liquid pump interface (1122) and a feeding port (1123) are arranged at the top of the smelting furnace body (112); a metal ingot is placed into a smelting chamber (1121) from a feed port (1123), and after the smelting chamber (1121) is heated to the melting point of the metal ingot, the metal ingot is melted into molten metal;
the liquid extraction pump (113) comprises a pump body (1131), a pump inlet (1132), a pump outlet (1133) and a pouring pipe joint (1134), and the liquid extraction pump (113) is connected with the smelting furnace body (112) through a liquid extraction pump interface (1122); the pump inlet (1132) and pump outlet (1133) are located within the smelting chamber (1121);
the die (130) comprises an upper die (131), a lower die (132) and a push rod (133);
the upper die (131) can move up and down along with an upper cylinder of the hydraulic machine (120), and the ejector rod (133) can move up and down along with an ejector cylinder of the hydraulic machine (120);
the upper part of the charging barrel of the lower die (132) is provided with a hemispherical pouring gate (1321), and the lower part of the charging barrel is provided with two symmetrically distributed strip-shaped guide slotted holes (1322); the pump outlet (1133) is communicated with the hemispherical pouring gate (1321) through a pouring tube (114);
the upper end of the ejector rod (133) is in clearance fit in a charging barrel of the lower die (132), a side rod (1331) is connected in the radial direction of the ejector rod (133), the side rod (1331) penetrates through the strip-shaped guide slotted hole (1322) to start the hydraulic machine (120), and the side rod (1331) moves up and down along the strip-shaped guide slotted hole (1322);
a cooling channel (1332) is arranged in the ejector rod (133), and the cooling channel (1332) is connected with an external cooling liquid circulating device (170) through a pipeline;
the lower die (132) further comprises a stroke control device (160) for controlling the ejector rod (133) to move up and down; the travel control device (160) comprises a stand (161), a lower proximity switch (162) and an upper proximity switch (163), wherein the lower proximity switch (162) and the upper proximity switch (163) are respectively positioned at the upper part and the lower part of the stand (161); the side lever (1331) is positioned between the lower proximity switch (162) and the upper proximity switch (163);
when the ejector rod (133) moves up and down, the side rod (1331) is driven to move up and down along with the ejector rod;
when the side lever (1331) contacts the lower proximity switch (162), the ejector rod (133) stops moving downwards;
when the side rod (1331) contacts the upper proximity switch (163), the ejector rod (133) seals the hemispherical gate (1321), the ejector rod (133) stops moving upwards, and at the same time, the liquid pump (113) stops delivering molten metal.
2. The extrusion device for quantitative infusion of light alloy according to claim 1, wherein: one end of the pouring tube (114) is a pouring nozzle (1141), and the other end is a pouring tube inlet (1142);
the outlet outline of the pouring nozzle (1141) is hemispherical and is connected with a hemispherical pouring gate (1321) on a charging barrel of the lower die (132), and the pouring pipe inlet (1142) is connected with a pump outlet (1133) of the liquid pump (113);
in the working process of the liquid drawing pump (113), the metal liquid flows along the direction from the pump inlet (1132) to the pump outlet (1133), the liquid level of the metal liquid at least exceeds the joint of the pouring pipe inlet (1142) and the pump outlet (1133), and the metal liquid flowing out of the pump outlet (1133) can enter the pouring pipe (114) and be sent into the charging barrel of the lower die (132).
3. The extrusion device for quantitative infusion of light alloy according to claim 2, wherein: when the working frequency of the liquid pump (113) is the hovering frequency, the molten metal entering the pouring pipe (114) can hover near the outlet of the pouring nozzle (1141), so that the molten metal is stabilized in a state to be flown out;
when an increment frequency is added to the liquid pumping pump (113), the actual pouring frequency of the liquid pumping pump (113) is the hovering frequency plus the increment frequency, molten metal flows out from the pouring nozzle (1141), the molten metal outflow rate is the increment frequency multiplied by the working time under the frequency, and the pouring rate is controlled by controlling the increment frequency and the working time, so that the quantitative conveying of the molten metal is realized.
4. The extrusion device for quantitative infusion of light alloy according to claim 2, wherein: the extrusion device also comprises a die temperature machine (140); the mold temperature machine (140) is connected to the mold (130) through a pipeline and is used for uniformly heating the mold cavity of the mold (130).
5. The extrusion device for quantitative infusion of light alloy according to claim 2, wherein: the extrusion device further comprises a shielding gas device (115); the shielding gas device (115) is used for introducing shielding gas into the smelting chamber (1121) through a gas pipe; the shielding gas device (115) is opened when the temperature of the smelting chamber (1121) exceeds 350 DEG or 400 DEG; when the temperature of the smelting chamber (1121) is lower than 350 DEG or 400 deg.
6. The extrusion device for quantitative infusion of light alloy according to claim 2, wherein: the pouring nozzle (1141) is connected with the hemispherical pouring gate (1321), in particular to a locking device (150);
the locking device (150) comprises a hoop formed by a cross rod (151) and two screws (152), and the hoop is sleeved on a charging barrel of the lower die (132); the end part of the pouring nozzle (1141) is provided with a symmetrical connecting block (1143), and two screws (152) respectively penetrate through connecting holes on the cross rod (151) and the connecting block (1143); after the pouring nozzle (1141) is in butt joint with the hemispherical pouring gate (1321), nuts on the two screws (152) are locked, and then the pouring nozzle (1141) is connected and locked with the hemispherical pouring gate (1321) of the lower die (132).
7. The extrusion device for quantitative infusion of light alloy according to claim 2, wherein: the pouring tube (114) is sleeved in the pouring tube joint (1134) so as to be fixed with the smelting furnace body (112).
8. The extrusion device for quantitative infusion of light alloy according to claim 2, wherein: the outer layer of the pouring tube (114) is provided with a heating element for heating the pouring tube (114) to a required temperature and an insulating layer for insulating the heated pouring tube (114).
9. The extrusion device for quantitative infusion of light alloy according to claim 2, wherein: the smelting furnace body (112) is arranged on the track frame (111); wheels are arranged between the bottom of the smelting furnace body (112) and the track frame (111).
10. Method of operating an extrusion apparatus according to any one of claims 1-9, characterized in that it comprises the steps of:
s1, step: the smelting chamber (1121) and the pouring tube (114) are heated to a set temperature;
s2, step: adjusting the working frequency of the liquid pump (113) to a hovering frequency, and preparing to start pouring;
s3, step: starting pouring, wherein the working frequency of a liquid pump (113) is increased to the actual pouring frequency, molten metal flows into a charging barrel from a pouring nozzle (1141), a push rod (133) moves upwards after a delay injection time, when a side rod (1331) is in upward contact with an upper proximity switch (163), the working frequency of the liquid pump (113) is changed to a hovering frequency, pouring is stopped, the push rod (133) keeps moving upwards, and the push rod stops lifting after moving for a set time;
s4, step: raising the upper die (131) and lifting the ejector rod (133), and ejecting the extruded casting;
s5, step: lowering the ejector rod (133) until the ejector rod contacts the lower proximity switch (162), and lowering the upper die (131) to be clamped;
s6, step: repeating the steps S3 to S5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311374436.2A CN117583579A (en) | 2023-10-23 | 2023-10-23 | Extrusion device and method for quantitative transfusion light alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311374436.2A CN117583579A (en) | 2023-10-23 | 2023-10-23 | Extrusion device and method for quantitative transfusion light alloy |
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| CN117583579A true CN117583579A (en) | 2024-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311374436.2A Pending CN117583579A (en) | 2023-10-23 | 2023-10-23 | Extrusion device and method for quantitative transfusion light alloy |
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| Country | Link |
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| CN (1) | CN117583579A (en) |
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