Ultrahigh-strength automobile aluminum alloy part die-casting die

Abstract

The ultrahigh-strength automobile aluminum alloy part die-casting die comprises a first bottom plate, a second bottom plate, a first die plate, a second die plate, an ejector rod mechanism, a cooling mechanism and a gas-assisted demolding assembly, two square blocks are fixedly arranged on the first bottom plate, the first die plate is fixedly arranged on the square blocks, and the second die plate is fixedly arranged on the second bottom plate. A positioning rod is fixedly arranged on the first bottom plate, the second bottom plate is in sliding connection with the first bottom plate through the positioning rod, the second mold plate is fixedly arranged on the second bottom plate, an ejector rod mechanism is arranged in the first mold plate in a sliding mode, a cooling cavity is formed in the second mold plate, and the ejector rod mechanism is arranged in the cooling cavity. And a cooling mechanism is rotationally arranged in the cooling cavity in a sealed mode, and gas-assisted demolding assemblies are arranged in the first mold plate and the second mold plate correspondingly.

Description

Technical Field

[0001] The invention relates to the technical field of metal die-casting, in particular to a die-casting die for ultra-high-strength automotive aluminum alloy parts. Background Art

[0002] With the development trend of lightweight automobiles, the application of ultra-high-strength aluminum alloy die-castings is becoming more and more extensive. However, ultra-high-strength die-castings also require a more precise and harsh die-casting environment, especially in the cooling of the mold during the die-casting molding process and the demolding work after molding.

[0003] At present, most traditional molds use one-way linear cooling water channels to cool the molds. In this cooling method, the cooling medium flows along a fixed path, which will cause a large temperature difference on the cavity surface, resulting in gradual local overheating and shrinkage, as well as thermal stress concentration in the mold, reducing its service life, and the cooling speed is slow. At the same time, when demolding, the conventional ejector mechanism generally directly ejects the casting mechanically for forced demolding. Friction will occur between the ejector and the casting, causing scratches on the casting and wear on the mold. Therefore, the production efficiency and production quality of the casting are not high.

[0004] Therefore, it is necessary to provide a die-casting die for ultra-high strength automotive aluminum alloy parts to solve the problems raised in the above background technology. Summary of the Invention

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A die-casting mold for ultra-high-strength automotive aluminum alloy parts, comprising a first base plate, a second base plate, a first template, a second template, a push rod mechanism, a cooling mechanism and a gas-assisted demolding assembly, wherein two blocks are fixedly provided on the first base plate, the first template is fixedly provided on the blocks, a positioning rod is fixedly provided on the first base plate, the second base plate is slidingly connected to the first base plate through the positioning rod, the second template is fixedly provided on the second base plate, a push rod mechanism is slidingly provided in the first template, a cooling cavity is opened in the second template, a cooling mechanism is sealed and rotatably provided in the cooling cavity, and gas-assisted demolding assemblies are provided in both the first template and the second template.

[0006] Preferably, the cooling mechanism includes a cooling plate, a first water inlet ring, a second water inlet ring, a first drain ring and a second drain ring, wherein cooling channel one and cooling channel two are evenly spaced circumferentially in the cooling plate, the first water inlet ring and the first drain ring are fixedly arranged on the inner side of the cooling plate, the second water inlet ring and the second drain ring are fixedly arranged on the outer side of the cooling plate, and the first water inlet ring and the first drain ring are respectively connected to the input end and the output end of the cooling channel one, and the second water inlet ring and the second drain ring are respectively connected to the input end and the output end of the cooling channel two.

[0007] Preferably, the second template is provided with a first water inlet cavity, a second water inlet cavity, a first drainage cavity and a second drainage cavity for the sealed rotation of the first water inlet ring, the second water inlet ring, the first drainage ring and the second drainage ring, and a plurality of L-shaped water inlet channels are circumferentially provided on the outer side of the second water inlet cavity along its tangential direction. The second template is also provided with an annular cavity connected to the plurality of L-shaped water inlet channels, and the first water inlet cavity, the second water inlet cavity, the first drainage cavity, the second drainage cavity and the annular cavity are all connected to the external cooling circulation mechanism through a water pipe.

[0008] Preferably, a plurality of blades are fixedly provided on the second water inlet ring in a circumferential manner, and the height of the blades covers the L-shaped water inlet channel and is smaller than the width of the second water inlet cavity.

[0009] Preferably, the gas-assisted demolding assembly includes a plurality of air holes, a sealing rod, a hydraulic rod and a driving rod opened on the outer ring of the second template and the first template, wherein the sealing rod is slidably and rotatably arranged in the air hole, a rectangular hydraulic rod is slidably arranged at the end of the air hole, the driving rod is fixedly arranged at the output end of the hydraulic rod, and the driving rod is slidably connected to the sealing rod, and a plurality of air supply channels for connecting the air holes with the external air supply mechanism are opened in the first template and the second template.

[0010] Preferably, a guide groove consisting of a semi-arc groove and a straight groove is opened inside the air hole; A clamping block is fixedly provided on the outside of the blocking rod. The clamping block is clamped into the guide groove and slides or rotates along the guide groove.

[0011] Preferably, a spiral groove is provided inside the blocking rod; A guide block is fixedly provided on the driving rod, and the guide block slides along the spiral groove.

[0012] Preferably, the push rod mechanism includes a push plate and a push rod, wherein a plurality of push rods are fixedly provided on the push plate, the plurality of push rods are all slidably provided on the first template, and a hydraulic cylinder is provided between the push plate and the first bottom plate.

[0013] Compared with the prior art, the present invention provides a die-casting mold for ultra-high-strength automotive aluminum alloy parts, which has the following beneficial effects: In the present invention, a rotatable cooling mechanism and a cooling channel 2 for flowing from the outside to the inside of the cooling plate and a cooling channel 1 for flowing from the inside to the outside are provided in the cooling mechanism, so that the cooling plate forms a cooling block with uniform temperature distribution, thereby making the cooling mechanism uniform when cooling the mold and the casting, and the cooling speed is faster, thereby making the quality of the produced castings higher, effectively avoiding the problem of gradual quality decline due to uneven cooling, and in addition, arranging air-assisted demoulding components in the first template and the second template makes the demoulding of the casting and the mold faster and more convenient, and greatly reduces the damage to the casting during the demoulding process, further improving the production quality of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a side view schematic diagram of the overall structure of the present invention; Figure 3 for Figure 1 A magnified schematic diagram of the structure of part A in the middle; Figure 4 Schematic diagram of the internal structure of the second template in the present invention; Figure 5 It is a structural schematic diagram of the cooling mechanism in the present invention; Figure 6 Schematic diagram of the structure of the blocking rod in the present invention; In the figure: 1. first base plate; 11. block; 12. positioning rod; 2. second base plate; 3. first template; 4. second template; 41. cooling chamber; 42. first water inlet chamber; 43. second water inlet chamber; 431. L-shaped water inlet channel; 44. first drainage chamber; 45. second drainage chamber; 46. annular chamber; 5. ejector mechanism; 51. top plate; 52. ejector; 6. cooling mechanism; 61. cooling plate; 611. cooling channel 1; 612. cooling channel 2; 62. first water inlet ring; 63. second water inlet ring; 631. blade; 64. first drainage ring; 65. second drainage ring; 7. gas-assisted demoulding assembly; 71. air hole; 711. guide groove; 72. blocking rod; 721. block; 722. spiral groove; 73. hydraulic rod; 74. driving rod; 741. guide block. DETAILED DESCRIPTION

[0015] See also Figures 1 to 6In an embodiment of the present invention, a die-casting mold for an ultra-high-strength automotive aluminum alloy part includes a first base plate 1, a second base plate 2, a first template 3, a second template 4, a push rod mechanism 5, a cooling mechanism 6, and a gas-assisted demolding assembly 7, wherein two blocks 11 are fixedly provided on the first base plate 1, the first template 3 is fixedly provided on the blocks 11, a positioning rod 12 is fixedly provided on the first base plate 1, the second base plate 2 is slidably connected to the first base plate 1 through the positioning rod 12, the second template 4 is fixedly provided on the second base plate 2, a push rod mechanism 5 is slidably provided in the first template 3, a cooling cavity 41 is opened in the second template 4, a cooling mechanism 6 is sealed and rotatably provided in the cooling cavity 41, and the first template 3 and the second template 4 are both provided with a gas-assisted demolding assembly 7; The cooling mechanism 6 includes a cooling plate 61, a first water inlet ring 62, a second water inlet ring 63, a first drain ring 64 and a second drain ring 65, wherein a cooling channel 1 611 and a cooling channel 2 612 are evenly spaced apart at a circumference in the cooling plate 61, the first water inlet ring 62 and the first drain ring 64 are fixedly provided on the inner side of the cooling plate 61, and the second water inlet ring 63 and the second drain ring 65 are fixedly provided on the outer side of the cooling plate 61, and the first water inlet ring 62 and the first drain ring 64 are respectively connected to the input end and the output end of the cooling channel 1 611, and the second water inlet ring 63 and the second drain ring 65 are respectively connected to the input end and the output end of the cooling channel 2 612; The second template 4 is provided with a first water inlet cavity 42, a second water inlet cavity 43, a first drainage cavity 44, and a second drainage cavity 45 for sealed rotation of the first water inlet ring 62, the second water inlet ring 63, the first drainage ring 64, and the second drainage ring 65. The outer side of the second water inlet cavity 43 is provided with a plurality of L-shaped water inlet channels 431 along its tangential direction. The second template 4 is also provided with an annular cavity 46 connected to the plurality of L-shaped water inlet channels 431. The first water inlet cavity 42, the second water inlet cavity 43, the first drainage cavity 44, the second drainage cavity 45, and the annular cavity 46 are all connected to the external cooling circulation mechanism through a water pipe. A plurality of blades 631 are fixedly provided on the second water inlet ring 63 in a circumferential manner. The height of the blades 631 covers the L-shaped water inlet channel 431 and is smaller than the width of the second water inlet cavity 43 .

[0016] During implementation, when the casting needs to be cooled after die-casting, the cooling medium is introduced into the first water inlet cavity 42 and the second water inlet cavity 43 through the external cooling circulation mechanism, and then the cooling medium is transmitted from the plurality of cooling channels 1 611 and cooling channels 2 612 to the first drainage cavity 44 and the second drainage cavity 45 after filling the first water inlet cavity 42 and the second water inlet cavity 43, and then the cooling medium returns to the external cooling circulation mechanism to quickly cool the mold and the casting, and before the cooling medium is introduced into the second water inlet cavity 43, the cooling medium will first fill the annular cavity 46, and then enter the second water inlet cavity 43 through the L-shaped water inlet channel 431, and because the L-shaped water inlet channel 431 is along the second water inlet cavity 43 It is opened in the tangential direction, so when the cooling medium enters the second water inlet cavity 43 from the L-shaped water inlet channel 431, the cooling medium can push the blade 631 to rotate along the second water inlet cavity 43, and drive the second water inlet ring 63 and the entire cooling mechanism 6 to rotate. In addition, when the cooling medium flows along cooling channel 1 611, it flows from the inside to the outside of the cooling plate 61, and when the cooling medium flows along cooling channel 2 612, it flows from the outside to the inside of the cooling plate 61. Therefore, the cooling medium can perform bidirectional cooling on the mold and the casting, and through the rotation of the cooling mechanism 6, the cooling plate 61 forms a cooling block with uniform temperature distribution, thereby accelerating the cooling speed of the mold and the casting, and the cooling is more uniform, effectively improving the quality of the casting.

[0017] In addition, it should be noted that the cooling mechanism 6 proposed in the present invention is not fixed to Figure 5 The shape shown in the figure can be adjusted according to the specific mold shape.

[0018] In this embodiment, Figure 1 、 Figure 3 and Figure 6 The gas-assisted demoulding assembly 7 includes a plurality of air holes 71, a blocking rod 72, a hydraulic rod 73 and a driving rod 74, which are provided on the outer ring of the second template 4 and the first template 3. The blocking rod 72 is slidably and rotatably arranged in the air hole 71. A rectangular hydraulic rod 73 is slidably provided at the end of the air hole 71. The driving rod 74 is fixedly provided at the output end of the hydraulic rod 73 and is slidably connected to the blocking rod 72. A plurality of air transmission channels for connecting the air holes 71 with an external air supply mechanism are provided in both the first template 3 and the second template 4. In addition, the sliding power of the hydraulic rod 73 comes from an external hydraulic drive mechanism, that is, a hydraulic chamber is provided at the end of the air hole 71, and the hydraulic rod 73 slides along this hydraulic chamber in a sealed manner. The hydraulic rod 73 is driven to slide by the hydraulic force, and the hydraulic rod 73 is rectangular, so it does not rotate when it slides. The air hole 71 has a guide groove 711 formed by a semi-arc groove and a straight groove. The blocking rod 72 is fixedly provided with a clamping block 721 on the outside. The clamping block 721 is clamped into the guide groove 711 and slides or rotates along the guide groove 711. The sealing rod 72 has a spiral groove 722 formed inside. A guide block 741 is fixedly provided on the driving rod 74 , and the guide block 741 slides along the spiral groove 722 ; The push rod mechanism 5 includes a top plate 51 and a push rod 52, wherein a plurality of push rods 52 are fixedly provided on the top plate 51, and the plurality of push rods 52 are all slidably provided on the first template 3, and a hydraulic cylinder is provided between the top plate 51 and the first bottom plate 1.

[0019] During implementation, when cooling is completed and demoulding is performed, the hydraulic rod 73 in the second template 4 is first driven to slide, and the sliding of the hydraulic rod 73 drives the driving rod 74 to slide along the blocking rod 72. At this time, the guide block 741 will slide along the spiral groove 722, thereby causing the blocking rod 72 to rotate on its own, and at the same time, the blocking block 721 will rotate along the semi-arc groove in the guide groove 711. When the guide block 741 slides to the end of the spiral groove 722, the blocking block 721 just turns into the straight groove, thereby causing the hydraulic rod 73 to drive the blocking rod 72 to slide, and the blocking rod 72 no longer blocks the air hole 71, and then the external air supply mechanism is used to pulse the air to the air hole 71. Nitrogen is released, thereby separating the casting from the second template 4. During this process, the blocking rod 71 will first rotate and then separate from the surface of the casting, so that the blocking rod 71 will not cause damage to the casting when separating from the casting, further improving the production quality of the casting. After the second template 4 is separated, the gas-assisted demoulding component 7 in the first template 3 is driven to pulse nitrogen, so that the casting is separated from the surface of the first template 3 and the ejector rod 52, and then the ejector plate 51 is driven to slide and the ejector rod 52 is driven to slide and gradually eject, completing a casting operation. Through this method, the quality of the produced casting is higher, and the mold and the casting are evenly cooled during cooling, further extending the service life of the mold.

[0020] To sum up, when the present invention is implemented, the cooling plate 61 forms a cooling block with uniform temperature distribution through the rotationally arranged cooling mechanism 6 and the cooling channel 2 612 flowing from the outside to the inside of the cooling plate 61 and the cooling channel 1 611 flowing from the inside to the outside in the cooling mechanism 6, so that the cooling mechanism 6 can evenly cool the mold and the casting, and the cooling speed is faster, so that the quality of the produced castings is higher, and the problem of gradual quality decline due to uneven cooling is effectively avoided. In addition, the air-assisted demolding component 7 is arranged in the first template 3 and the second template 4, which makes the demolding of the casting and the mold faster and more convenient, and greatly reduces the damage to the casting during the demolding process, further improving the production quality of the casting.

[0021] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A die-casting mold for ultra-high strength automotive aluminum alloy parts, characterized by: The invention comprises a first base plate (1), a second base plate (2), a first template (3), a second template (4), a push rod mechanism (5), a cooling mechanism (6) and an air-assisted demoulding assembly (7), wherein two blocks (11) are fixedly provided on the first base plate (1), the first template (3) is fixedly provided on the blocks (11), a positioning rod (12) is fixedly provided on the first base plate (1), the second base plate (2) is slidably connected to the first base plate (1) through the positioning rod (12), the second template (4) is fixedly provided on the second base plate (2), a push rod mechanism (5) is slidably provided in the first template (3), a cooling cavity (41) is provided in the second template (4), a cooling mechanism (6) is sealed and rotatably provided in the cooling cavity (41), and an air-assisted demoulding assembly (7) is provided in both the first template (3) and the second template (4).

2. The ultra-high strength automotive aluminum alloy die-casting mold according to claim 1, characterized in that: The cooling mechanism (6) comprises a cooling plate (61), a first water inlet ring (62), a second water inlet ring (63), a first drain ring (64) and a second drain ring (65), wherein a cooling channel 1 (611) and a cooling channel 2 (612) are evenly spaced apart in a circumference in the cooling plate (61), the first water inlet ring (62) and the first drain ring (64) are fixedly arranged on the inner side of the cooling plate (61), the second water inlet ring (63) and the second drain ring (65) are fixedly arranged on the outer side of the cooling plate (61), and the first water inlet ring (62) and the first drain ring (64) are respectively connected to the input end and the output end of the cooling channel 1 (611), and the second water inlet ring (63) and the second drain ring (65) are respectively connected to the input end and the output end of the cooling channel 2 (612).

3. The ultra-high strength automotive aluminum alloy die-casting mold according to claim 2, characterized in that: The second template (4) is provided with a first water inlet cavity (42), a second water inlet cavity (43), a first drainage cavity (44) and a second drainage cavity (45) for the sealed rotation of the first water inlet ring (62), the second water inlet ring (63), the first drainage ring (64) and the second drainage ring (65); a plurality of L-shaped water inlet channels (431) are circumferentially provided on the outer side of the second water inlet cavity (43) along its tangential direction; the second template (4) is also provided with an annular cavity (46) connected to the plurality of L-shaped water inlet channels (431); the first water inlet cavity (42), the second water inlet cavity (43), the first drainage cavity (44), the second drainage cavity (45) and the annular cavity (46) are all connected to an external cooling circulation mechanism through a water pipe.

4. The ultra-high strength automotive aluminum alloy die-casting mold according to claim 3, characterized in that: A plurality of blades (631) are fixedly arranged in a circumferential manner on the second water inlet ring (63), and the height of the blades (631) covers the L-shaped water inlet channel (431) and is smaller than the width of the second water inlet cavity (43).

5. The ultra-high strength automotive aluminum alloy die-casting mold according to claim 1, characterized in that: The gas-assisted demoulding component (7) includes a plurality of air holes (71), a blocking rod (72), a hydraulic rod (73) and a driving rod (74) provided on the outer ring of the second template (4) and the first template (3), wherein the blocking rod (72) is slidably and rotatably arranged in the air hole (71), a rectangular hydraulic rod (73) is slidably provided at the end of the air hole (71), the driving rod (74) is fixedly provided at the output end of the hydraulic rod (73), and the driving rod (74) is slidably connected to the blocking rod (72), and a plurality of air supply channels for connecting the air hole (71) with an external air supply mechanism are provided in the first template (3) and the second template (4).

6. The ultra-high strength automotive aluminum alloy die-casting mold according to claim 5, characterized in that: A guide groove (711) consisting of a semi-arc groove and a straight groove is provided inside the air hole (71); A clamping block (721) is fixedly provided on the outside of the blocking rod (72), and the clamping block (721) is clamped into the guide groove (711) and slides or rotates along the guide groove (711).

7. The ultra-high strength automotive aluminum alloy die-casting mold according to claim 5, characterized in that: A spiral groove (722) is provided inside the blocking rod (72); A guide block (741) is fixedly provided on the driving rod (74), and the guide block (741) slides along the spiral groove (722).

8. The ultra-high strength automotive aluminum alloy die-casting mold according to claim 1, characterized in that: The push rod mechanism (5) comprises a top plate (51) and a push rod (52), wherein a plurality of push rods (52) are fixedly arranged on the top plate (51), and the plurality of push rods (52) are all slidably arranged on the first template (3), and a hydraulic cylinder is arranged between the top plate (51) and the first bottom plate (1).

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