Magnesium-lithium alloy and composite material ingot casting mold

Abstract

A magnesium-lithium alloy and composite material ingot casting mold is composed of a base, an upper mold and a lower mold, wherein the upper mold and the lower mold are split. The lower die consists of a plurality of first half dies and third half dies, one ends of the first half dies and the third half dies are movably connected, the contact surfaces are provided with arc grooves which are symmetrical along the central axis, the upper die consists of a plurality of second half dies and fourth half dies, the same ends of the second half dies and the fourth half dies are movably connected, the contact surfaces are also provided with arc grooves which are symmetrical along the respective central axis, and the two arc grooves are matched to form a casting channel; through combination of different numbers of half molds, casting requirements of cast ingots with different qualities can be met, the problem that pouring gates of a traditional combined mold are difficult to align is solved, meanwhile, the design of the pouring gates can better adapt to the flowability of magnesium-lithium alloy, during casting, liquid magnesium-lithium alloy enters the pouring gates from the pouring gates and uniformly flows to a casting cavity through gaps of the pouring gates, and the casting quality of the magnesium-lithium alloy is improved. The problem that liquid metal is difficult to flow uniformly when a conventional ingot casting mold is used for casting magnesium-lithium alloy is effectively solved.

Description

Technical Field

[0001] The invention belongs to the field of magnesium alloy processing, and specifically relates to a magnesium-lithium alloy and composite material ingot casting mold. Background Art

[0002] In recent years, with the improvement of smelting and surface treatment technology, magnesium-lithium alloys have once again received people's attention. The newly developed ultra-light magnesium-lithium alloy not only has ultra-light weight and high strength ratio, but is also lighter than ordinary magnesium alloys, while its specific strength has not decreased, maintaining high rigidity and strength, and the rigidity can reach 20 times that of steel, and it also has good electrical and thermal conductivity. Due to the low melting point of magnesium-lithium alloys, precise temperature control is required during the casting process to avoid defects such as thermal lines, but the existing ingot mold structure cannot adapt well to the ingot casting of ultra-light magnesium-lithium alloys. The traditional mold uses a casting mouth for casting and cannot adapt well to the fluidity of magnesium-lithium alloys, resulting in uneven flow during the ingot casting process, causing bubbles to appear inside the alloy, and wrinkles and cracks on the surface of the alloy ingot. At the same time, the traditional ingot mold has uneven heat dissipation, which will not have much impact on the heat dissipation of traditional metals, but the melting point of magnesium-lithium alloys is low. Using traditional molds for heat dissipation and cooling will cause the magnesium-lithium alloy to shrink and eventually cause the magnesium-lithium alloy ingot to deform, affecting the quality of the finished product. Summary of the invention

[0003] In order to solve the problem that the above-mentioned traditional ingot casting mold cannot be well adapted to the ingot casting of ultra-light magnesium-lithium alloy, the present invention proposes a magnesium-lithium alloy and composite material ingot casting mold to solve the above-mentioned problem.

[0004] A magnesium-lithium alloy and composite material ingot casting mold, characterized in that: it comprises a base, a sludge hole is opened on the upper surface of the base, a cooling water inlet and outlet are opened on the side of the base, and a lower mold is installed above the base;

[0005] The lower mold is provided with a casting cavity in the center, the lower mold comprises a first half mold and a third half mold, the first half mold and the third half mold comprise a plurality of molds, one end of the first half mold is movably connected with one end of the third half mold, arc grooves are provided on the contact surfaces of the first half mold and the third half mold, the arc grooves are symmetrically distributed along the central axis of the first half mold, the contact surfaces of the third half mold and the first half mold are provided with arc grooves, the arc grooves are symmetrically arranged along the central axis of the first half mold, and an upper mold is installed above the lower mold;

[0006] The upper mold comprises a second half mold and a fourth half mold, the second half mold and the fourth half mold comprise a plurality of parts, one end of the second half mold is movably connected to one end of the fourth half mold, arc grooves are arranged on the contact surfaces of the second half mold and the fourth half mold, the arc grooves are symmetrically arranged along the central axis of the second half mold, the arc grooves are symmetrically arranged along the central axis of the fourth half mold, two arc grooves cooperate to form a casting channel, the two second half molds and the fourth half mold are combined to form an upper mold, a riser installation groove is arranged on the upper surface of the upper mold, a riser is installed in the riser installation groove, a riser limit block is arranged at the lower end of the riser installation groove, and four corners of the upper mold surface are also arranged The mold is formed by combining a plurality of half molds. By combining different numbers of half molds, it can adapt to the casting of ingots of different qualities. The casting channel is formed by combining arc grooves, which avoids the difficulty of aligning the casting ports after multiple combinations of traditional combined molds. At the same time, the casting channel can better adapt to the fluidity of the magnesium-lithium alloy. During the casting process, the liquid magnesium-lithium alloy enters the casting channel from the casting port and flows evenly into the casting cavity from the gap of the casting channel, effectively avoiding the problem that the conventional ingot mold cannot make the liquid magnesium-aluminum alloy flow evenly in the mold during the casting process of the magnesium-lithium alloy ingot.

[0007] Furthermore, a protrusion is provided at the center of one side of the first half mold close to the casting cavity, and the cross-section of the protrusion is an isosceles trapezoid. Arc grooves are provided on both sides of the protrusion close to one end of the casting cavity, and chamfers are provided at the connection between the arc grooves and the top surface of the protrusion. A limit block is provided on one side of the first half mold close to the casting cavity, and the limit blocks are located on both sides of the one side of the first half mold close to the casting cavity. A slide is provided on one side of the limit block close to the protrusion, and the slide is matched with one end of the third half mold; the slide is matched with the third half mold, which is more convenient when combined, and the limit blocks are provided on both sides to prevent the mold from being misaligned and improve the assembly efficiency.

[0008] Furthermore, the third half mold is provided with a protrusion on one side close to the casting cavity, the cross-section of the protrusion is an isosceles trapezoid, circular arc grooves are provided on both sides of the protrusion, and chamfers are provided at the fusion points of the circular arc groove and the protrusion close to the casting cavity; the chamfers can cooperate with the circular arc grooves to form a casting channel, without the need for additional design of the casting channel, thereby reducing manufacturing costs.

[0009] Furthermore, the main structure of the second half mold is the same as that of the first half mold. The difference between the second half mold and the first half mold is that a protrusion is provided on the upper part of the second half mold close to the casting cavity, and the two sides of the protrusion are inclined surfaces. The protrusion close to the casting cavity is an arc surface, and a riser limit block is provided at the lower end of the arc surface. A riser installation groove is provided at the opening of the upper mold to facilitate the subsequent installation of the riser, further reduce the probability of bubbles and cavities, and improve the overall quality of the ingot.

[0010] Furthermore, the main structure of the fourth half mold is the same as that of the third half mold. The difference between the fourth half mold and the third half mold is that a protrusion is provided on the upper part of the fourth half mold close to the casting cavity, and the two sides of the protrusion are inclined surfaces. A positioning groove is provided in the center of the protrusion close to the casting cavity, and the positioning groove is cooperated with a positioning rod. The two ends of the protrusion close to the casting cavity are arc surfaces, and the middle part of the protrusion close to the casting cavity is a plane, and a riser limit block is provided at the lower end of the protrusion close to the casting cavity.

[0011] Furthermore, the first half mold, the second half mold, the third half mold, and the fourth half mold are collectively referred to as half molds. A heat dissipation groove is provided on the side of the half mold away from the casting cavity. The heat dissipation groove is evenly arranged along the outer surface of the half mold. The heat dissipation groove is arranged to help the template to dissipate heat evenly and prevent wrinkles on the surface of the ingot due to uneven heat dissipation. In particular, magnesium-lithium alloy has a low melting point. If uneven heat dissipation occurs, obvious wrinkles and cracks will appear, affecting the quality of the ingot. Uniform heat dissipation grooves are arranged to make the ingot cool evenly, further reducing the occurrence of wrinkles and cracks in the finished product.

[0012] Furthermore, the slag holes correspond one-to-one to the casting channel positions, and the base is provided with slag holes. During the casting process, the heavier slag of the liquid magnesium-lithium alloy will be deposited in the slag holes during the casting process, preventing the slag from entering the casting cavity and reducing the quality of the ingot.

[0013] Furthermore, a riser mounting groove is provided in the center of the upper die.

[0014] Furthermore, a cooling cavity is provided inside the base, and a plurality of cooling cavities are provided. The cooling cavities are evenly distributed inside the base, and adjacent cooling cavities are connected, and the cooling cavity is connected to a cooling water inlet and outlet. Multiple cooling cavities are provided in the base, and cooling water is added therein for circulation, thereby further improving the cooling efficiency. At the same time, the cooling cavities are evenly distributed inside the base, and the heat is evenly dissipated, thereby preventing wrinkles and cracks caused by uneven heat dissipation.

[0015] A method for using a magnesium-lithium alloy and composite material ingot casting mold comprises the following steps:

[0016] S1, combining the mold; selecting a suitable number of half molds according to the size of the ingot to combine, combining two first half molds and two third half molds to form a lower mold, aligning and installing the slideways at one end of the third half mold and one end of the first half mold during the combination, aligning and fixing the casting channel on the surface of the lower mold with the slag hole on the upper surface of the base, combining two second half molds and two fourth half molds into an upper mold, combining and fixing the upper mold and the lower mold to form a mold, and installing a corresponding riser in the riser installation groove at the top of the mold;

[0017] S2, casting; pouring the liquid magnesium-lithium alloy into the mold through the casting port, the liquid magnesium-lithium alloy passes through the casting channel, and flows out from the casting channel evenly to fill the casting cavity. When the casting cavity is almost full, pour an appropriate amount of liquid magnesium-lithium alloy into the riser to fill the ingot;

[0018] S3, cooling; after the casting is completed, cooling water is circulated into the base to help dissipate heat.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The mold is formed by combining multiple half molds. By combining different numbers of half molds, it can adapt to the casting of ingots of different qualities. The casting channel is formed by combining arc grooves, which avoids the difficulty of aligning the casting ports after multiple combinations of traditional combined molds. At the same time, the casting channel can better adapt to the fluidity of the magnesium-lithium alloy. During the casting process, the liquid magnesium-lithium alloy enters the casting channel from the casting port and flows evenly into the casting cavity from the gap of the casting channel, effectively avoiding the problem that the conventional ingot mold cannot make the liquid magnesium-aluminum alloy flow evenly in the mold during the casting process of the magnesium-lithium alloy ingot.

[0021] Heat dissipation grooves are set up to help the template to dissipate heat evenly and prevent wrinkles on the ingot surface due to uneven heat distribution. Multiple cooling cavities are set up in the base, and cooling water is added into them for circulation to further improve the cooling efficiency. At the same time, the cooling cavities are evenly distributed inside the base to dissipate heat evenly and prevent wrinkles and cracks caused by uneven heat dissipation.

[0022] The chamfer and the arc groove are matched to form a casting channel, which does not require additional casting channel design, thereby reducing manufacturing costs. At the same time, a slag hole is provided on the base. During the casting process, the heavier slag of the liquid magnesium-lithium alloy will be deposited in the slag hole during the casting process, thereby preventing the slag from entering the casting cavity and reducing the quality of the ingot. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the structure of a magnesium-lithium alloy and composite material ingot mold A;

[0025] Figure 2 It is a schematic diagram of the structure of a magnesium-lithium alloy and composite material ingot mold B;

[0026] Figure 3 is a schematic diagram of the base structure;

[0027] Figure 4 It is the schematic diagram of the upper die structure A;

[0028] Figure 5 It is the schematic diagram of the upper die structure B;

[0029] Figure 6 It is an enlarged view of part A;

[0030] Figure 7 It is a schematic diagram of the lower die structure;

[0031] Figure 8 is a schematic diagram A of the second half mold structure;

[0032] Fig. 9 is a schematic diagram B of the second half mold structure;

[0033] Fig.10 is a schematic diagram A of the fourth half-mold structure;

[0034] Fig.11 is a schematic diagram B of the fourth half-mold structure;

[0035] Fig.12 is a schematic diagram of the first half mold structure A;

[0036] Fig.13 is a schematic diagram of the first half mold structure B;

[0037] Fig.14 is a schematic diagram A of the third half mold structure;

[0038] Fig.15 is a schematic diagram B of the third half mold structure;

[0039] Fig.16 This is a cross-sectional structural diagram of the base plate.

[0040] In the figure: 1, base; 101, cooling water inlet and outlet; 102, sediment hole; 103, cooling cavity; 2, first half mold; 3, second half mold; 301, riser mounting groove; 302, riser limit block; 4, third half mold; 5, fourth half mold; 501, positioning groove; 6, support column; 7, glass skylight; 8, positioning rod; 9, casting mouth; 10, casting cavity; 11, casting channel; 12, arc groove; 13, limit block. DETAILED DESCRIPTION

[0041] 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 in conjunction with the embodiments. 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.

[0042] The application principle of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0043] Example 1

[0044] like Figure 1-16 As shown; A magnesium-lithium alloy and composite material ingot casting mold, characterized in that: it includes a base 1, a sludge hole 102 is opened on the upper surface of the base 1, a cooling water inlet and outlet 101 is opened on the side of the base 1, and a lower mold is installed above the base 1;

[0045] A casting cavity 10 is provided in the center of the lower mold, the lower mold includes a first half mold 2 and a third half mold 4, the first half mold 2 and the third half mold 4 include a plurality of, one end of the first half mold 2 and one end of the third half mold 4 are movably connected, the contact surface of the first half mold 2 and the third half mold 4 is provided with an arc groove 12, the arc groove 12 is symmetrically distributed along the central axis of the first half mold 2, the contact surface of the third half mold 4 and the first half mold 2 is provided with an arc groove 12, the arc groove 12 is symmetrically arranged along the central axis of the first half mold 2, and an upper mold is installed above the lower mold;

[0046] The upper mold includes a second half mold 3 and a fourth half mold 5, wherein the second half mold 3 and the fourth half mold 5 include a plurality of parts, one end of the second half mold 3 and one end of the fourth half mold 5 are movably connected, and the contact surfaces of the second half mold 3 and the fourth half mold 5 are both provided with arc grooves 12, the arc grooves 12 are symmetrically arranged along the central axis of the second half mold 3, and the arc grooves 12 are symmetrically arranged along the central axis of the fourth half mold 5, and two arc grooves 12 cooperate to form a casting channel 11, and the two second half molds 3 and the fourth half mold 5 are combined to form an upper mold, and a riser installation groove 301 is opened on the upper surface of the upper mold, and a riser is installed in the riser installation groove 301, and a riser limit block 302 is also arranged at the lower end of the riser installation groove 301, and a casting port 9 is also arranged at the four corners of the upper mold surface.

[0047] A protrusion is provided in the center of one side of the first half mold 2 close to the casting cavity 10, and the cross-section of the protrusion is an isosceles trapezoid. Arc grooves 12 are provided on both sides of the protrusion close to one end of the casting cavity 10, and the connection between the arc groove 12 and the top surface of the protrusion is chamfered. A limit block 13 is provided on one side of the first half mold 2 close to the casting cavity 10, and the limit blocks 13 are located on both sides of one side of the first half mold 2 close to the casting cavity 10. A slideway is provided on the side of the limit block 13 close to the protrusion, and the slideway is matched with one end of the third half mold 4.

[0048] The third half mold 4 is provided with a protrusion on one side close to the casting cavity 10 , the cross section of the protrusion is an isosceles trapezoid, circular arc grooves 12 are provided on both sides of the protrusion, and chamfers are provided at the fusion of the circular arc groove 12 and the protrusion close to the casting cavity 10 .

[0049] The main structure of the second half mold 3 is the same as that of the first half mold 2. The difference between the second half mold 3 and the first half mold 2 is that a protrusion is provided on the upper part of the second half mold 3 close to the casting cavity 10, and the two sides of the protrusion are inclined surfaces. The protrusion is close to the casting cavity 10 and is an arc surface, and a riser limit block 302 is provided at the lower end of the arc surface.

[0050] The main structure of the fourth half mold 5 is the same as that of the third half mold 4. The difference between the fourth half mold 5 and the third half mold 4 is that a protrusion is provided on the upper half of the fourth half mold 5 close to the casting cavity 10, and the two sides of the protrusion are inclined surfaces. A positioning groove 501 is provided in the center of the protrusion close to the casting cavity 10, and the positioning groove 501 is matched with a positioning rod 8. The two ends of the protrusion close to the casting cavity 10 are arc surfaces, and the middle part of the protrusion close to the casting cavity 10 is a plane. A riser limit block 302 is provided at the lower end of the protrusion close to the casting cavity 10.

[0051] Furthermore, the first half mold 2, the second half mold 3, the third half mold 4, and the fourth half mold 5 are collectively referred to as half molds, and a heat dissipation groove is provided on a side of the half mold away from the casting cavity 10, and the heat dissipation groove is evenly arranged along the outer surface of the half mold.

[0052] The positions of the slag holes 102 and the sprue 11 correspond one to one.

[0053] A riser installation groove 301 is arranged in the center of the upper mold, and a glass skylight 7 is also provided at the top of the mold, and support columns 6 are installed on both sides of the glass skylight 7.

[0054] Example 2

[0055] like Figure 1-16 As shown; a method for using a magnesium-lithium alloy and composite material ingot casting mold, comprising the following steps;

[0056] S1, combined mold; according to the size of the ingot, select a suitable number of half molds for combination, combine two first half molds 2 and two third half molds 4 to form a lower mold, align and install the slideway at one end of the third half mold 4 and one end of the first half mold 2 during the combination, align and fix the casting channel 11 on the surface of the lower mold with the sediment hole 102 on the upper surface of the base 1, combine two second half molds 3 and two fourth half molds 5 into an upper mold, combine and fix the upper mold and the lower mold to form a mold, and install the corresponding riser in the riser installation groove 301 at the top of the mold;

[0057] S2, casting; pouring the liquid magnesium-lithium alloy into the mold through the casting port 9, the liquid magnesium-lithium alloy passes through the casting channel 11, and flows out from the casting channel 11 evenly to fill the casting cavity 10. When the casting cavity 10 is almost full, pour an appropriate amount of liquid magnesium-lithium alloy into the riser to fill the ingot;

[0058] S3, cooling; after casting is completed, cooling water is introduced into the cooling cavity 103 in the base for circulation to help dissipate heat and accelerate the formation of the ingot.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0060] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A magnesium-lithium alloy and composite material ingot casting mold, characterized in that: It comprises a base (1), the upper surface of the base (1) is provided with a sediment hole (102), the side of the base (1) is provided with a cooling water inlet and outlet (101), and a lower mold is installed above the base (1); A casting cavity (10) is arranged at the center of the lower mold; the lower mold comprises a first half mold (2) and a third half mold (4); the first half mold (2) and the third half mold (4) comprise a plurality of parts; one end of the first half mold (2) is movably connected to one end of the third half mold (4); arc grooves (12) are arranged on the contact surfaces of the first half mold (2) and the third half mold (4); the arc grooves (12) are symmetrically distributed along the central axis of the first half mold (2); the contact surfaces of the third half mold (4) and the first half mold (2) are arranged on the contact surfaces; the arc grooves (12) are symmetrically arranged along the central axis of the first half mold (2); an upper mold is installed above the lower mold; The upper mold comprises a second half mold (3) and a fourth half mold (5), wherein the second half mold (3) and the fourth half mold (5) comprise a plurality of molds, one end of the second half mold (3) and one end of the fourth half mold (5) are movably connected, and arc grooves (12) are arranged on the contact surfaces of the second half mold (3) and the fourth half mold (5), wherein the arc grooves (12) are symmetrically arranged along the central axis of the second half mold (3), and the arc grooves (12) are symmetrically arranged along the central axis of the fourth half mold (5), and the two arc grooves (12) cooperate to form a casting channel (11), and the end of the casting channel (11) is a casting port (9), and the casting port (9) is located on the upper surface of the upper mold.

2. The magnesium-lithium alloy and composite material ingot casting mold according to claim 1, characterized in that: A protrusion is provided at the center of one side of the first half mold (2) close to the casting cavity (10), the cross section of the protrusion is an isosceles trapezoid, arc grooves (12) are provided on both sides of the protrusion close to one end of the casting cavity (10), and the connection between the arc groove (12) and the top surface of the protrusion is chamfered, and a limit block (13) is provided on one side of the first half mold (2) close to the casting cavity (10), and the limit blocks (13) are located on both sides of one side of the first half mold (2) close to the casting cavity (10), and a slideway is provided on one side of the limit block (13) close to the protrusion, and the slideway is matched with one end of the third half mold (4).

3. The magnesium-lithium alloy and composite material ingot casting mold according to claim 1, characterized in that: The third half mold (4) is provided with a protrusion on one side close to the casting cavity (10), the cross section of the protrusion is an isosceles trapezoid, circular arc grooves (12) are provided on both sides of the protrusion, and a chamfer is provided at the fusion point between the circular arc groove (12) and the protrusion on one side close to the casting cavity (10).

4. The magnesium-lithium alloy and composite material ingot casting mold according to claim 1, characterized in that: The main structure of the second half mold (3) is the same as that of the first half mold (2). The difference between the second half mold (3) and the first half mold (2) is that a protrusion is provided on the upper part of the second half mold (3) close to the casting cavity (10), the two sides of the protrusion are inclined surfaces, the side of the protrusion close to the casting cavity (10) is an arc surface, and a riser limit block (302) is provided at the lower end of the arc surface.

5. The magnesium-lithium alloy and composite material ingot casting mold according to claim 1, characterized in that: The main structure of the fourth half mold (5) is the same as that of the third half mold (4). The fourth half mold (5) is different from the third half mold (4) in that a protrusion is provided on the upper part of the side of the fourth half mold (5) close to the casting cavity (10), the two sides of the protrusion are inclined surfaces, a positioning groove (501) is provided in the center of the side of the protrusion close to the casting cavity (10), the positioning groove (501) is matched with a positioning rod (8), the two ends of the protrusion are arc surfaces, the middle part of the side of the protrusion close to the casting cavity (10) is a plane, and a riser limit block (302) is provided at the lower end of the side of the protrusion close to the casting cavity (10).

6. The magnesium-lithium alloy and composite material ingot casting mold according to claim 1, characterized in that: The first half mold (2), the second half mold (3), the third half mold (4), and the fourth half mold (5) are collectively referred to as half molds. A heat dissipation groove is provided on a side of the half mold away from the casting cavity (10), and the heat dissipation groove is evenly arranged along the outer surface of the half mold.

7. The magnesium-lithium alloy and composite material ingot casting mold according to claim 1, characterized in that: The positions of the sediment holes (102) and the casting channel (11) correspond one to one.

8. The magnesium-lithium alloy and composite material ingot casting mold according to claim 1, characterized in that: A riser installation groove (301) is arranged in the center of the upper die.

9. The magnesium-lithium alloy and composite material ingot casting mold according to claim 1, characterized in that: A cooling cavity (103) is provided inside the base (1), a plurality of cooling cavities (103) are provided, the cooling cavities (103) are evenly distributed inside the base (1), adjacent cooling cavities (103) are connected, and the cooling cavity (103) is connected to a cooling water inlet and outlet (101).

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