Electromagnetic pressure forming device and forming process for magnesium alloy

Abstract

The invention relates to the technical field of die-casting forming equipment, in particular to an electromagnetic pressure forming device and process for magnesium alloy, the device comprises a melting holding furnace, a special-shaped sealing ring and an adjusting assembly, and the melting holding furnace comprises a furnace body, a furnace cover and an executing mechanism. The furnace body is hinged to the furnace cover, the executing mechanism is arranged outside the melting heat preservation furnace, the power end of the executing mechanism is arranged on the furnace cover, and the executing mechanism is used for driving the furnace cover to be opened or closed. The special-shaped sealing ring and the adjusting assembly are arranged, and after the furnace cover is opened, the adjusting assembly adjusts the extending length of the special-shaped sealing ring in the axis direction of the furnace cover, so that the difference value of opening areas of all positions in the open state of the furnace cover can be reduced, and it is guaranteed that after the furnace cover is opened, the temperature difference of all positions of materials in the melting and holding furnace is not large; and the influence on the quality of the casting part caused by poor temperature uniformity of the material is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of die-casting equipment, and in particular to an electromagnetic pressure forming device and a forming process for a magnesium alloy. Background Art

[0002] The die casting molding device usually includes multiple components, such as a melting and holding furnace, an injection mechanism, a mold, a clamping mechanism, a control system, a cooling system, an exhaust system, and an ejection mechanism, etc. The melting and holding furnace is used to melt and keep the molten metal warm to ensure that the temperature of the molten metal is stable.

[0003] During the long production process, as the molten metal is continuously used, new metal raw materials need to be added to the melting and holding furnace. Therefore, after a period of time, the furnace cover needs to be opened and an appropriate amount of metal raw materials need to be added to ensure that the amount of molten metal in the furnace is sufficient. The furnace cover and the furnace body of the existing melting and holding furnace mostly adopt a hinged connection structure. In this way, when the furnace cover is opened, the opening area on the side close to the hinge point between the furnace cover and the furnace body is small, and the opening area on the side away from the hinge point between the furnace cover and the furnace body is large. The difference in opening area will cause the temperature uniformity of the magnesium alloy solution inside the furnace body to be different when the furnace cover is opened, which will further cause poor quality of the castings. Summary of the invention

[0004] Based on this, it is necessary to provide an electromagnetic pressurizing molding device and molding process for magnesium alloy to address the problems existing in the current die-casting molding equipment, so as to solve the problem that when the furnace cover of the die-casting molding equipment is controlled in the open state, the temperature uniformity of the magnesium alloy solution inside the furnace body is uneven, which in turn causes the poor quality of the castings.

[0005] The above purpose is achieved through the following technical solutions:

[0006] An electromagnetic pressurizing forming device for magnesium alloy comprises a melting and holding furnace, the melting and holding furnace comprises a furnace body, a furnace cover, an actuator, a special-shaped sealing ring and an adjusting component, the furnace body and the furnace cover are hinged, the actuator is arranged outside the furnace body, the actuator is used to control the furnace cover to open or close, the special-shaped sealing ring is arranged at the lower end of the furnace cover, the special-shaped sealing ring can be extended or shortened along the axial direction of the furnace cover, the adjusting component is arranged inside the furnace cover, the adjusting component is used to adjust the protruding length of the special-shaped sealing ring along the axial direction of the furnace cover, and the adjusting component is configured to adjust the protruding length of the special-shaped sealing ring along the axial direction of the furnace cover when the furnace cover is opened, so that the protruding length of the special-shaped sealing ring along the axial direction of the furnace cover increases from the side close to the hinge point to the side away from the hinge point.

[0007] In one embodiment, the special-shaped sealing ring includes a sealing bag part and a folded part. The sealing bag part is an annular rubber air bag. The outer peripheral surface of the sealing bag part is an annular surface. The diameter of the annular surface is adapted to the inner diameter of the furnace body. The folded part is a flexible rubber ring. The flexible rubber ring can be unfolded or folded along the axial direction of the furnace cover so that the special-shaped sealing ring can be extended or shortened along the axial direction of the furnace cover; the upper end of the folded part is arranged at the lower end of the furnace cover, and the lower end of the folded part is fixedly connected to the sealing bag part.

[0008] In one embodiment, the adjustment assembly includes an isolation plate and a plurality of connecting columns, a chamber is provided inside the furnace cover, the chamber is annular, the isolation plate is rotatably arranged in the chamber, the isolation plate is annular, and the isolation plate isolates the chamber into an upper chamber and a lower chamber, and the upper chamber and the lower chamber are not connected to each other;

[0009] The lower chamber is loaded with liquid cooling medium;

[0010] A plurality of T-shaped slide grooves are provided at the lower end of the isolation plate, and the plurality of T-shaped slide grooves are arranged at equal intervals around the axis of the isolation plate, and the T-shaped slide grooves extend along the radial direction of the isolation plate, and a T-shaped slider is slidably connected in the T-shaped slide grooves;

[0011] Multiple connecting columns are arranged at equal intervals along the circumference of the isolation plate, and the upper ends of the multiple connecting columns are spherically hinged on the lower end surface of the T-shaped slider, and the other ends of the multiple connecting columns slide out from the lower end of the furnace cover and are connected to the folded part.

[0012] In one embodiment, the adjustment component also includes a plurality of arc-shaped connecting plates, and the plurality of arc-shaped connecting plates correspond to the plurality of connecting columns one by one. The plurality of arc-shaped connecting plates circumferentially enclose an annular structure. An arc-shaped groove is provided at the upper end of the arc-shaped connecting plate, and the arc-shaped groove extends along the circumference of the furnace cover. An arc-shaped boss is provided at the lower end of the connecting column, and the arc-shaped boss is slidably connected in the arc-shaped groove. The side surface of the arc-shaped connecting plate is fixedly connected to the folded part.

[0013] In one of the embodiments, a spherical groove is provided on the inner peripheral wall of the chamber, and an elastic sealing ring is provided on the outer peripheral surface of the isolation plate, and the elastic sealing ring is rotatably connected in the spherical groove.

[0014] In one of the embodiments, a spherical groove is provided on the inner wall of the chamber, and the outer surface of the isolation plate is a spherical surface, so that the isolation plate can be rotated in the chamber through the cooperation between the spherical surface and the spherical groove.

[0015] In one of the embodiments, a sliding seal is formed between the connecting column and the furnace cover.

[0016] In one of the embodiments, a water injection hole is provided on the outside of the furnace cover, and the water injection hole can be connected to the chamber.

[0017] In one of the embodiments, the electromagnetic pressurizing device for magnesium alloy further comprises an electromagnetic pressurizing system, and the electromagnetic pressurizing system is used to provide pressure so that the magnesium alloy solution completes the entire low-pressure casting process.

[0018] An electromagnetic press forming process for a magnesium alloy, using the electromagnetic press forming device for the magnesium alloy, the process is as follows:

[0019] S1: Purge and clean the mold cavity;

[0020] S2: The mold is pressed down so that the gate of the mold and the output end interface of the electromagnetic pump are sealed;

[0021] S3: starting the electromagnetic pump, driving the magnesium alloy solution in the melting and holding furnace into the mold cavity through the electromagnetic pump, and completing the anti-gravity filling;

[0022] S4: After the casting solidifies, the mold rises, the electromagnetic pump stops running, and the output end of the electromagnetic pump is separated from the gate of the mold;

[0023] S5: open the mold and take out the casting;

[0024] S6: Detect the material volume inside the furnace body. If the material volume is less than the lower limit, start the actuator, open the furnace cover, add materials to the furnace body, and detect the material volume inside the furnace body in real time. When the material volume inside the furnace body is equal to the upper limit, start the actuator and close the furnace cover;

[0025] S7: Repeat S1-S6.

[0026] The beneficial effects of the present invention are:

[0027] The present invention is provided with a special-shaped sealing ring and an adjusting component. After the furnace cover is opened, the adjusting component adjusts the protruding length of the special-shaped sealing ring along the axial direction of the furnace cover, so that the difference in opening area at various locations when the furnace cover is opened can be reduced, ensuring that after the furnace cover is opened, the temperature difference at various locations of the material inside the melting and holding furnace will not be very large, avoiding the quality of the castings being affected by the poor temperature uniformity of the material. In addition, it can also ensure that when the furnace cover is opened, the circumferential locations of the special-shaped sealing ring are out of contact with the furnace body as much as possible at the same time, and when the furnace cover is closed, the circumferential locations of the special-shaped sealing ring are in contact with the furnace body as much as possible at the same time, so that the wear of the special-shaped sealing ring can be as uniform as possible, avoiding different degrees of wear at various circumferential locations of the special-shaped sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an overall schematic diagram of an electromagnetic press forming device for magnesium alloy of the present invention;

[0029] Figure 2It is a structural schematic diagram of a melting and holding furnace in an electromagnetic press forming device for magnesium alloy of the present invention;

[0030] Figure 3 for Figure 2 Middle AA section view;

[0031] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at B in the middle;

[0032] Figure 5 for Figure 3 Schematic diagram of the enlarged structure at C in the middle;

[0033] Figure 6 It is a schematic diagram of a furnace cover in an electromagnetic press forming device for magnesium alloy according to the present invention in an open state;

[0034] Figure 7 for Figure 6 Schematic diagram of the enlarged structure at D in the middle;

[0035] Figure 8 It is a schematic diagram of the furnace cover structure in an electromagnetic press forming device for magnesium alloy of the present invention;

[0036] Fig. 9 It is a schematic diagram of the structure of an arc-shaped connecting plate in an electromagnetic press forming device for magnesium alloy of the present invention;

[0037] Fig.10 This is a schematic diagram of the structure of a connecting column in an electromagnetic press forming device for magnesium alloy of the present invention;

[0038] Fig.11 It is a schematic diagram of the structure of a T-shaped slider in an electromagnetic press forming device for magnesium alloy of the present invention;

[0039] Fig.12 The figure is a schematic diagram of a T-shaped slideway structure in an electromagnetic press forming device for magnesium alloy according to the present invention.

[0040] in:

[0041] 100. Melting and holding furnace; 110. Furnace body; 120. Furnace cover; 1211. Upper chamber; 1212. Lower chamber; 1213. Spherical groove; 122. Water injection hole; 123. Rotating support rod; 130. Actuator; 200. Special-shaped sealing ring; 210. Sealing bag part; 220. Folding part; 300. Adjusting assembly; 310. Isolation plate; 311. Elastic sealing ring; 320. Connecting column; 321. Arc boss; 330. Arc connecting plate; 331. Arc groove; 340. T-shaped slider; 350. T-shaped slide groove; 400. Low-pressure casting machine. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] The serial numbers of the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0044] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] like Figure 1-Figure 12As shown, an electromagnetic press forming device for magnesium alloy includes a melting and holding furnace 100, which includes a furnace body 110, a furnace cover 120, an actuator 130, a special-shaped sealing ring 200 and an adjustment component 300. The actuator 130 can be a common power mechanism, such as any one of an electric telescopic rod, a hydraulic telescopic rod or a pneumatic telescopic rod. The furnace body 110 and the furnace cover 120 are hinged, and the actuator 130 is arranged outside the melting and holding furnace 100. Specifically, the fixed end of the actuator 130 is arranged outside the furnace body 110, and the power end of the actuator 130 is arranged on the furnace cover 120. The actuator 130 is used to control The furnace cover 120 is opened or closed, and the special-shaped sealing ring 200 is arranged at the lower end of the furnace cover 120. The special-shaped sealing ring 200 can be extended or shortened along the axial direction of the furnace cover 120. The adjusting component 300 is arranged inside the furnace cover 120. The adjusting component 300 is used to adjust the extended length of the special-shaped sealing ring 200 along the axial direction of the furnace cover 120. The adjusting component 300 is configured so that when the furnace cover 120 is opened, the adjusting component 300 adjusts the extended length of the special-shaped sealing ring 200 along the axial direction of the furnace cover 120, so that the extended length of the special-shaped sealing ring 200 along the axial direction of the furnace cover 120 increases from the side close to the hinge point to the side away from the hinge point.

[0046] When the furnace cover 120 needs to be opened, the actuator 130 is started. Under the driving action of the actuator 130, the furnace cover 120 rotates around the hinge point between it and the melting and holding furnace 100, so that the furnace cover 120 is opened. At this time, a proper amount of metal raw materials, such as magnesium alloy, hereinafter referred to as materials, can be added into the melting and holding furnace 100 through the feeding mechanism or manually by workers. After the adding is completed, the furnace cover 120 can be closed through the actuator 130. After the furnace cover 120 is opened, the adjustment component 300 adjusts the protruding length of the special-shaped sealing ring 200 along the axial direction of the furnace cover 120, so that the protruding length of the special-shaped sealing ring 200 along the axial direction of the furnace cover 120 increases from the side close to the hinge point to the side away from the hinge point, that is, the special-shaped sealing ring 200 extends downward along the axial direction of the furnace cover 120, and the protruding length of the special-shaped sealing ring 200 on the side away from the hinge point of the furnace cover 120 is longer, and the protruding length on the side close to the hinge point of the furnace cover 120 is shorter. In this way, the difference in opening area at various locations when the furnace cover 120 is opened can be reduced to ensure that the furnace cover 120 is opened. After opening, the temperature difference of the material at various places inside the melting and holding furnace 100 will not be very large, which avoids the quality of the casting caused by the poor temperature uniformity of the material. In addition, the special-shaped sealing ring 200 is arranged in this way, which can also ensure that when the furnace cover 120 is opened, the circumferential parts of the special-shaped sealing ring 200 are out of contact with the furnace body 110 as much as possible at the same time, and when the furnace cover 120 is closed, the circumferential parts of the special-shaped sealing ring 200 are in contact with the furnace body 110 as much as possible at the same time, so that the wear of the special-shaped sealing ring 200 can be as uniform as possible, avoiding different degrees of wear at various circumferential parts of the special-shaped sealing ring 200.

[0047] When closing the furnace cover 120, the actuator 130 is also started, and the furnace cover 120 is driven by the actuator 130 to rotate downward around the hinge point between the furnace body 110 and the furnace body 110, so that the furnace cover 120 is closed. During the closing process of the furnace cover 120, the adjustment component 300 adjusts the extension length of the adjustment component 300 along the axial direction of the furnace cover 120, so that the contraction length of the special-shaped sealing ring 200 on the side farther away from the hinge point is longer, and the contraction length of the special-shaped sealing ring 200 on the side closer to the hinge point is shorter. Therefore, after the furnace cover 120 is closed, the extension length of the special-shaped sealing ring 200 along the axial direction of the furnace cover 120 is the same. This is done to ensure the flow stability of the hot air flow inside the melting and insulation furnace 100 and reduce the temperature fluctuation inside the melting and insulation furnace 100.

[0048] In a further embodiment, Figure 5As shown, the special-shaped sealing ring 200 includes a sealing bag part 210 and a folding part 220. The sealing bag part 210 is an annular rubber airbag. The outer peripheral surface of the sealing bag part 210 is an annular surface. The diameter of the annular surface is adapted to the inner diameter of the furnace body 110. The folding part 220 is a flexible rubber ring. The flexible rubber ring can be unfolded or folded along the axial direction of the furnace cover 120 so that the special-shaped sealing ring 200 can be extended or shortened along the axial direction of the furnace cover 120. The upper end of the folding part 220 is arranged at the lower end of the furnace cover 120, and the lower end of the folding part 220 is fixedly connected to the sealing bag part 210.

[0049] Specifically, when the furnace cover 120 is opened, the adjustment component 300 controls the folding part 220 to unfold along the axial direction of the furnace cover 120, specifically, the unfolding length of the folding part 220 is longer on the side farther away from the hinge point, and the unfolding length is shorter on the side closer to the hinge point, thereby achieving the purpose of the special-shaped sealing ring 200 having a longer extended length on the side farther away from the hinge point of the furnace cover 120 and a shorter extended length on the side closer to the hinge point of the furnace cover 120.

[0050] It should be supplemented that the sealing bag portion 210 is provided to ensure the sealing of the interior of the melting and holding furnace 100 when the furnace cover 120 is closed.

[0051] In a further embodiment, Figure 3 and Figure 4 , Figure 5 As shown, the regulating assembly 300 includes an isolation plate 310 and a plurality of connecting columns 320. A chamber is provided inside the furnace cover 120. The chamber is annular. The isolation plate 310 is rotatably arranged in the chamber. The isolation plate 310 is annular. The isolation plate 310 isolates the chamber into an upper chamber 1211 and a lower chamber 1212. The upper chamber 1211 and the lower chamber 1212 are not connected to each other. The lower chamber 1212 is loaded with liquid cooling medium. The lower end of the isolation plate 310 is provided with a plurality of T-shaped slide grooves 35 0, a plurality of T-shaped slide grooves 350 are arranged at equal intervals around the axis of the isolation plate 310, and the T-shaped slide grooves 350 extend radially along the isolation plate 310, a T-shaped slider 340 is slidably connected in the T-shaped slide grooves 350, a plurality of connecting columns 320 are arranged at equal intervals along the circumference of the isolation plate 310, and the upper ends of the plurality of connecting columns 320 are spherically hinged on the lower end surface of the isolation plate 310, and the lower ends of the plurality of connecting columns 320 slide out from the lower end of the furnace cover 120 and are connected to the folding part 220.

[0052] When the furnace cover 120 is opened, the liquid cooling medium is no longer evenly distributed along the circumference of the chamber due to the influence of gravity, but is more on the side close to the hinge point and less on the side away from the hinge point. The isolation plate 310 is rotatably arranged in the chamber and floats on the liquid surface of the liquid cooling medium. Therefore, the isolation plate 310 is inclined, and the side of the isolation plate 310 close to the hinge point is far from the lower surface of the chamber, and the side away from the hinge point is close to the lower surface of the chamber. Since the connecting column 320 is spherically hinged at the lower end of the T-shaped slider 340, the isolation plate 310 is driven by the action of the belt In use, the downward movement distance of the connecting column 320 on the side close to the hinge point is small, and the downward movement distance of the connecting column 320 on the side away from the hinge point is large. Since the lower end of the connecting column 320 is connected to the folding part 220, the connecting column 320 drives the folding part 220 to move downward and unfold, so that the unfolded length of the folding part 220 is longer on the side farther away from the hinge point, and the unfolded length is shorter on the side closer to the hinge point of the furnace cover 120, thereby achieving the purpose of the special-shaped sealing ring 200 having a longer extended length on the side farther away from the hinge point and a shorter extended length on the side closer to the hinge point.

[0053] It should also be noted that when the furnace cover 120 is opened, the amount of liquid cooling medium on the side close to the hinge point is greater than the amount on the side away from the hinge point. This allows the overall center of gravity of the furnace cover 120 to be biased toward the hinge point, so that the actuator 130 can open the furnace cover 120 with less effort and avoid excessive wear of the actuator 130.

[0054] It should be added that the present invention uses the flow of liquid cooling medium as a driving source to drive the isolation plate 310 to rotate when the furnace cover 120 is opened or closed, so as to realize the self-adjustment of the position of the isolation plate 310 when the furnace cover 120 is closed or opened, and has strong adaptability. In addition, by arranging the liquid cooling medium in the lower chamber 1212, the heat inside the furnace body 110 can be effectively absorbed and stored when the material is smelted inside the furnace body 110, so that the temperature of the furnace cover 120 is basically consistent with the temperature inside the furnace body 110. When the furnace cover 120 is opened, due to the heat storage of the liquid cooling medium, the temperature of the furnace cover 120 itself will not change too much. In this way, when the furnace cover 120 is closed, the temperature of the furnace cover 120 and the temperature inside the furnace body 110 will not differ too much, which can effectively prevent the temperature inside the furnace body 110 from fluctuating after the furnace cover 120 is closed, and also prevent the furnace cover 120 from stress deformation.

[0055] It should also be noted that in order to make the inclination angle of the isolation plate 310 more significant when the liquid level of the cold cooling medium changes, the center point of the isolation plate 310 should also be limited to prevent the center point position of the isolation plate 310 from changing with the change of the liquid level. Specifically, a rotating support rod 123 is provided in the chamber, and both ends of the rotating support rod 123 extend along the radial direction of the chamber and are rotatably connected to the inner peripheral wall of the chamber. To facilitate the installation of the isolation plate 310, specifically, the isolation plate 310 can be arranged into two split plates, a rotating semicircular groove is opened in the center of the two plates, the two rotating semicircular grooves are spliced ​​into a rotating circular groove, and the rotating support rod 123 is rotatably connected in the rotating circular groove. To connect the two plates together, specifically, a plurality of through holes can be opened on the end face of the lower plate, the plurality of through holes are evenly distributed along the circumference of the plate, and the through holes extend along the axis of the plate, and countersunk threaded holes are opened on the end face of the upper plate, the countersunk threaded holes correspond to the through holes one by one, and after the two plates are butt-jointed together, the bolts are passed through the through holes and screwed into the countersunk threaded holes.

[0056] It should also be noted that, in order to prevent the gas inside the upper chamber 1211 from hindering the rotation of the isolation plate 310 , specifically, a vent hole can be opened on the furnace body 110 , and the vent hole is connected to the interior of the upper chamber 1211 .

[0057] In a further embodiment, Figure 5 , Fig. 9 and Fig.10 As shown, the adjustment assembly 300 also includes a plurality of arc-shaped connecting plates 330, and the plurality of arc-shaped connecting plates 330 correspond to the plurality of connecting columns 320 one by one. The plurality of arc-shaped connecting plates 330 circumferentially enclose an annular structure, and an arc-shaped groove 331 is provided at the upper end of the arc-shaped connecting plate 330, and the arc-shaped groove 331 extends circumferentially along the furnace cover 120. An arc-shaped boss 321 is provided at the lower end of the connecting column 320, and the arc-shaped boss 321 is slidably connected in the arc-shaped groove 331, and the side of the arc-shaped connecting plate 330 is fixedly connected to the folding part 220.

[0058] The arc groove 331 and the arc boss 321 are provided to facilitate the installation and connection between the arc connecting plate 330 and the connecting column 320, and to enable the connecting column 320 to drive the folding part 220 to move synchronously through the arc connecting plate 330 when moving along its axis, thereby realizing the folding or unfolding of the folding part 220.

[0059] In a further embodiment, Figure 4 As shown, a spherical groove 1213 is opened on the inner peripheral wall of the chamber, and an elastic sealing ring 311 is provided on the outer peripheral surface of the isolation plate 310. The elastic sealing ring 311 is rotatably connected in the spherical groove 1213.

[0060] The elastic sealing ring 311 is provided to ensure sealing and prevent the upper chamber 1211 and the lower chamber 1212 from communicating with each other. Meanwhile, the elastic sealing ring 311 is elastic and deformable, so the isolation plate 310 can rotate in the spherical groove 1213 .

[0061] In other embodiments, a spherical groove 1213 is formed on the inner wall of the chamber, and the outer surface of the isolation plate 310 is a spherical surface, so that the isolation plate 310 can be rotated in the chamber through the cooperation between the spherical surface and the spherical groove 1213 .

[0062] Such an arrangement is equivalent to the isolation plate 310 being spherically hinged in the chamber, and the spherical surface of the isolation plate 310 is rotatably connected to the spherical groove 1213 to ensure sealing.

[0063] In a further embodiment, Figure 5 As shown, there is a sliding seal between the connecting column 320 and the furnace cover 120. Specifically, a sealing ring is provided at the sliding connection between the connecting column 320 and the furnace cover 120 to ensure the sealing of the sliding connection.

[0064] In a further embodiment, a water injection hole 122 is opened on the outside of the furnace cover 120, and the water injection hole 122 can be connected to the lower chamber.

[0065] The water injection hole 122 is provided for injecting a liquid cooling medium, such as cooling water, into the lower chamber 1212 .

[0066] In a further embodiment, the electromagnetic pressure forming device of the magnesium alloy also includes a low-pressure casting machine, which includes a mold and an electromagnetic pump. Specifically, the input end of the electromagnetic pump is connected to the bottom of the furnace body through a conduit, and the output end of the electromagnetic pump is located outside the furnace body.

[0067] An electromagnetic press forming process for magnesium alloy uses the above-mentioned electromagnetic press forming device for magnesium alloy, and the specific process flow is as follows:

[0068] S1: Purge and clean the mold cavity;

[0069] S2: The mold is pressed down so that the gate of the mold and the output end interface of the electromagnetic pump are sealed;

[0070] S3: starting the electromagnetic pump, driving the magnesium alloy solution in the melting and holding furnace into the mold cavity through the electromagnetic pump, and completing the anti-gravity filling;

[0071] S4: After the casting solidifies, the mold rises, the electromagnetic pump stops running, and the output end of the electromagnetic pump is separated from the gate of the mold;

[0072] S5: open the mold and take out the casting;

[0073] S6: Detect the material volume inside the furnace body. If the material volume is less than the lower limit, start the actuator, open the furnace cover, add materials to the furnace body, and detect the material volume inside the furnace body in real time. When the material volume inside the furnace body is equal to the upper limit, start the actuator and close the furnace cover;

[0074] S7: Repeat S1-S6.

[0075] When the casting is formed, a flame-retardant gas is first introduced into the mold cavity to blow and clean the mold cavity, then the mold is pressed down, and the gate of the mold is sealed and connected to the output end interface of the electromagnetic pump. Next, the electromagnetic pump is started, and the magnesium alloy solution at the bottom of the melting and holding furnace is driven by the electromagnetic pump to be filled into the mold cavity through the conduit to complete the counter-gravity filling. It should be explained here that since the mold cavity is located above the melting and holding furnace, the material overcomes gravity and flows upward to be filled into the mold cavity, that is, counter-gravity filling. After the temperature of the material inside the cavity gradually decreases, the casting gradually solidifies. When the casting is completely solidified, the mold is opened to take out the casting, that is, the upper mold and the lower mold are separated. It should also be explained that A liquid level sensor should be installed inside the furnace body to detect the volume of materials inside the furnace body. Before the casting of the previous casting is completed and before the next casting is cast, the volume of materials inside the furnace body is detected by the liquid level sensor. If the volume of materials inside the furnace body is lower than the lower limit, a feeding signal is sent to the actuator to control the furnace cover to open. At this time, workers can manually feed materials or add materials to the furnace body through a feeding mechanism. After the amount of materials inside the furnace body increases to the upper limit, the liquid level sensor sends an alarm signal, workers stop manually feeding materials or make the feeding mechanism stop feeding materials, and then the actuator controls the furnace cover to close, and then repeat the above steps to cast the next casting.

[0076] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. An electromagnetic press forming device for magnesium alloy, characterized in that: The invention comprises a melting and heat-insulating furnace, which comprises a furnace body, a furnace cover, an actuator, a special-shaped sealing ring and an adjusting component. The furnace body and the furnace cover are hinged. The actuator is used to control the furnace cover to be opened or closed. The special-shaped sealing ring is arranged at the lower end of the furnace cover. The special-shaped sealing ring can be extended or shortened along the axial direction of the furnace cover. The adjusting component is arranged inside the furnace cover. The adjusting component is used to adjust the extension length of the special-shaped sealing ring along the axial direction of the furnace cover. The adjusting component is configured so that when the furnace cover is opened, the protruding length of the special-shaped sealing ring along the axial direction of the furnace cover increases from the side close to the hinge point to the side away from the hinge point.

2. The electromagnetic press forming device for magnesium alloy according to claim 1, characterized in that: The special-shaped sealing ring includes a sealing bag part and a folding part. The sealing bag part is an annular rubber air bag. The outer peripheral surface of the sealing bag part is an annular surface. The diameter of the annular surface is adapted to the inner diameter of the furnace body. The folding part is a flexible rubber ring. The flexible rubber ring can be unfolded or folded along the axial direction of the furnace cover so that the special-shaped sealing ring can be extended or shortened along the axial direction of the furnace cover; the upper end of the folding part is arranged at the lower end of the furnace cover, and the lower end of the folding part is fixedly connected to the sealing bag part.

3. The electromagnetic press forming device for magnesium alloy according to claim 2, characterized in that: The regulating assembly includes an isolation plate and a plurality of connecting columns. A chamber is provided inside the furnace cover. The chamber is annular. The isolation plate is rotatably arranged in the chamber. The isolation plate is annular. The isolation plate isolates the chamber into an upper chamber and a lower chamber. The upper chamber and the lower chamber are not connected to each other. The lower chamber is loaded with liquid cooling medium; A plurality of T-shaped slide grooves are provided at the lower end of the isolation plate, and the plurality of T-shaped slide grooves are arranged at equal intervals around the axis of the isolation plate, and the T-shaped slide grooves extend along the radial direction of the isolation plate, and a T-shaped slider is slidably connected in the T-shaped slide grooves; Multiple connecting columns are arranged at equal intervals along the circumference of the isolation plate, and the upper ends of the multiple connecting columns are spherically hinged on the lower end surface of the T-shaped slider, and the other ends of the multiple connecting columns slide out from the lower end of the furnace cover and are connected to the folded part.

4. The electromagnetic press forming device for magnesium alloy according to claim 3, characterized in that: The adjustment component also includes multiple arc-shaped connecting plates, which correspond to multiple connecting columns one by one. The multiple arc-shaped connecting plates circumferentially enclose an annular structure. An arc-shaped groove is provided at the upper end of the arc-shaped connecting plate, and the arc-shaped groove extends along the circumference of the furnace cover. An arc-shaped boss is provided at the lower end of the connecting column, and the arc-shaped boss is slidably connected in the arc-shaped groove. The side of the arc-shaped connecting plate is fixedly connected to the folded part.

5. The electromagnetic press forming device for magnesium alloy according to claim 4, characterized in that: A spherical groove is provided on the inner peripheral wall of the chamber, and an elastic sealing ring is provided on the outer peripheral surface of the isolation plate. The elastic sealing ring is rotatably connected in the spherical groove.

6. The electromagnetic press forming device for magnesium alloy according to claim 4, characterized in that: A spherical groove is provided on the inner peripheral wall of the chamber, and the outer peripheral surface of the isolation plate is a spherical surface, so that the isolation plate can be rotated in the chamber through the cooperation between the spherical surface and the spherical groove.

7. The electromagnetic press forming device for magnesium alloy according to claim 3, characterized in that: A sliding seal is provided between the connecting column and the furnace cover.

8. The electromagnetic press forming device for magnesium alloy according to claim 1, characterized in that: A water injection hole is provided on the outside of the furnace cover, and the water injection hole can be connected to the chamber.

9. The electromagnetic press forming device for magnesium alloy according to claim 1, characterized in that: Also included is a low-pressure casting machine, which includes a mold and an electromagnetic pump.

10. An electromagnetic press forming process for magnesium alloy, characterized in that: The electromagnetic press forming device for magnesium alloy according to any one of claims 1 to 9 is applied, and the process is as follows: S1: Purge and clean the mold cavity; S2: The mold is pressed down so that the gate of the mold and the output end interface of the electromagnetic pump are sealed; S3: starting the electromagnetic pump, driving the magnesium alloy solution in the melting and holding furnace into the mold cavity through the electromagnetic pump, and completing the anti-gravity filling; S4: After the casting solidifies, the mold rises, the electromagnetic pump stops running, and the output end of the electromagnetic pump is separated from the gate of the mold; S5: open the mold and take out the casting; S6: Detect the material volume inside the furnace body. If the material volume is less than the lower limit, start the actuator, open the furnace cover, add materials to the furnace body, and detect the material volume inside the furnace body in real time. When the material volume inside the furnace body is equal to the upper limit, start the actuator and close the furnace cover; S7: Repeat S1-S6.

Images