Aluminum alloy hub casting equipment

Abstract

The utility model belongs to the technical field of hub casting and relates to aluminum alloy hub casting equipment which comprises a rack, a heat preservation furnace arranged on the rack, a liquid rising pipe, a lower die arranged on the rack and an upper die connected to the rack in a lifting and sliding mode, the liquid rising pipe is connected with the heat preservation furnace and the lower die, and the upper die and the lower die are spliced to form a cavity. The liquid rising pipe is communicated with the cavity and the interior of the heat preservation furnace, a pressurizing piece is arranged on the upper die and used for pressurizing the cavity, a switch element is arranged on the lower die and controls connection and disconnection between a liquid outlet of the liquid rising pipe and the cavity, and a first driving piece is arranged on the rack and drives the upper die to ascend and descend. After the solution is injected into the cavity, the switch element is closed, the heat preservation furnace is decompressed, the aluminum alloy solution in the liquid rising pipe flows back into the heat preservation furnace, the pressurizing piece pressurizes the interior of the cavity, it is guaranteed that a casting is solidified in the high-pressure environment, contact between the aluminum alloy solution and the liquid rising pipe is reduced, and the service life of the liquid rising pipe is prolonged.

Description

Technical field:

[0001] The utility model belongs to the technical field of wheel hub casting, in particular to an aluminum alloy wheel hub casting device. Background technology:

[0002] Domestic casting of aluminum alloy wheels mainly adopts low-pressure casting and gravity casting. Among them, low-pressure casting is more widely used than gravity casting due to its simple process, high yield rate and relatively good casting quality.

[0003] When using low-pressure casting to manufacture aluminum alloy wheels, the aluminum alloy solution in the holding furnace enters the mold cavity through the riser tube. After filling the mold cavity, it waits for the casting to completely solidify before reflowing. The solution stays in the riser tube for a long time. The riser tube is exposed to the high-temperature solution for a long time and is easily corroded, which shortens the service life of the riser tube and needs to be improved. Summary of the invention:

[0004] The purpose of the utility model is to provide an aluminum alloy wheel hub casting device.

[0005] The utility model is achieved in this way:

[0006] A kind of aluminum alloy wheel hub casting equipment includes a frame, a heat preservation furnace arranged on the frame, a riser, a lower mold arranged on the frame and an upper mold connected to the frame by lifting and sliding. The riser is connected to the heat preservation furnace and the lower mold. The upper mold and the lower mold are spliced ​​to form a cavity. The riser connects the cavity and the interior of the heat preservation furnace. The upper mold is provided with a pressure piece for pressurizing the cavity. The lower mold is provided with a switch element for controlling the connection between the liquid outlet of the riser and the cavity. The frame is provided with a driving member 1 for driving the upper mold to rise and fall.

[0007] Preferably, an air duct is provided on the lower mold, the air duct is arranged around the cavity, a cooling fan is provided on the frame, and the air outlet of the cooling fan faces the air duct.

[0008] Preferably, an air duct is opened on the lower mold, and the air duct connects the air duct and the cavity. A cover plate is rotatably connected to the lower mold, and the rotation of the cover plate controls the connection and disconnection between the air duct and the air duct. A second driving member is provided on the lower mold, and the second driving member drives the cover plate to rotate.

[0009] Preferably, the second driving member is a driving rod, which slides out and extends into the lower mold, and the driving rod is located on the moving path of the upper mold. The cover plate includes a plate body rotatably connected to the lower mold and a connecting rod coaxially connected to the plate body, the connecting rod and the plate body are spliced ​​into an included angle, and a connecting column is slidingly connected to the connecting rod, and the connecting column is rotatably connected to the driving rod, and the driving rod drives the connecting rod and the plate body to rotate through the connecting column. An elastic member is provided on the lower mold, and the elastic member presses against the driving rod, so that the driving rod has a tendency to slide out of the lower mold.

[0010] Preferably, a filter plate is coaxially connected to the plate body, the filter plate and the plate body are spliced ​​to form an angle, and the filter plate rotates to cover the airway.

[0011] Preferably, a limiting plate is provided on the inner wall of the airway, and the cover plate and the filter plate are respectively located on opposite sides of the limiting plate.

[0012] Preferably, a water absorbing member is provided on the filter plate.

[0013] Preferably, the driving rod includes a rod body slidably connected to the lower mold and an elastic sealing pad provided on the rod body, the upper mold abuts against the elastic sealing pad, and the elastic member tightens the rod body.

[0014] The outstanding advantages of the utility model compared with the prior art are:

[0015] 1. During the actual casting process, the holding furnace is pressurized to allow the aluminum alloy solution to be injected into the mold cavity from the riser tube. After the injection is completed, the switch element is closed, the holding furnace is depressurized, and the aluminum alloy solution in the riser tube flows back into the holding furnace. The pressurizing member increases the pressure in the mold cavity to ensure that the casting solidifies under a high-pressure environment, which is beneficial to reduce the contact between the aluminum alloy solution and the riser tube, and is beneficial to prolonging the service life of the riser tube;

[0016] 2. The utility model is helpful to increase the solidification speed of the casting by setting the cooling fan and the air duct, thereby improving the production efficiency;

[0017] 3. In the actual casting process of the utility model, the second driving member drives the cover plate to close the air channel and turn on the cooling fan to improve the solidification efficiency of the casting. After the casting is demolded, the second driving member drives the cover plate to open the air channel, so that the air channel is connected with the cavity, and the temperature inside the cavity is reduced, which is beneficial to improve the cooling efficiency of the upper and lower molds and the production efficiency. Description of the drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2This is a schematic diagram of the structure of the utility model partially cut away at the barrel, mainly showing the internal structure of the pressurizing member;

[0020] Figure 3 This is a schematic diagram of the structure of the utility model partially cut away at the lower mold, mainly showing the structure of the air duct in the lower mold;

[0021] Figure 4 for Figure 3 The enlarged view of part A in the middle mainly shows the structure of the cover;

[0022] Figure 5 This is a schematic structural diagram of a portion of the present invention cut away from another perspective of the lower die, mainly showing the structure of the second driving member;

[0023] Description of the drawings: 1. Frame; 11. Driving part 1; 2. Holding furnace; 3. Upper mold; 31. Cavity; 32. Air outlet; 4. Lower mold; 41. Air duct; 42. Air duct; 43. Limiting plate; 44. Sliding groove; 45. Elastic part; 5. Lifting pipe; 6. Pressurizing part; 61. Piston cylinder; 611. Cylinder body; 612. Piston block; 613. Sealing ring; 614. Piston chamber; 616. Through hole; 7. Cooling fan; 8. Cover plate; 81. Plate body; 82. Connecting rod; 821. Connecting column; 83. Filter plate; 831. Water absorption layer; 9. Driving part 2; 91. Driving rod; 911. Rod body; 912. Elastic sealing pad. Specific implementation method:

[0024] The present invention is further described below with reference to specific embodiments. Figure 1 —5:

[0025] The utility model discloses an aluminum alloy wheel hub casting device, an aluminum alloy wheel hub casting device, see Figure 1 The mold assembly comprises a frame 1, a holding furnace 2, an upper mold 3, a lower mold 4, and a riser pipe 5. The lower mold 4 is fixed to the frame 1, with the upper mold 3 positioned directly above it. The upper mold 3 is connected to the frame 1 for lifting and sliding movement. A driving member 11 is fixed to the frame 1. In this embodiment, the driving member 11 is a cylinder. The piston rod of the driving member 11 is fixedly connected to the upper mold 3, and the driving member 11 drives the upper mold 3 to move toward or away from the lower mold 4. The opposite ends of the riser pipe 5 are respectively fixedly connected to the holding furnace 2 and the lower mold 4. The holding furnace 2 contains molten aluminum alloy. The upper mold 3 and the lower mold 4 are spliced ​​to form a cavity 31. The riser pipe 5 connects the interior of the holding furnace 2 with the cavity 31. A booster is installed in the holding furnace 2 to pressurize the interior of the holding furnace 2, allowing the solution in the holding furnace 2 to enter the cavity 31. A switch element is fixed to the lower mold 4 to control the connection between the outlet of the riser pipe 5 and the cavity 31. The switching element in this embodiment is an electric control valve.

[0026] See also Figure 1 and2 An air outlet 32 ​​is provided on the upper mold 3, and the air outlet 32 ​​is located above the mold cavity 31. During the process of injecting the aluminum alloy solution into the mold cavity 31, the gas in the mold cavity 31 is discharged through the air outlet 32. A pressure member 6 is fixed on the upper mold 3, and the pressure member 6 is a piston cylinder 61. The piston cylinder 61 is connected to the air outlet 32. The piston cylinder 61 includes a cylinder body 611 fixed on the upper mold 3, a piston block 612 slidingly connected to the cylinder body 611 and a sealing ring 613. A piston chamber 614 is provided on the cylinder body 611. The piston block 612 is slidingly connected to the piston chamber 614. The sliding direction of the piston block 612 is parallel to the distribution direction of the cylinder body 611 and the upper mold 3. The piston block 612 slides close to or away from the upper mold 3. The sealing ring 613 is arranged around the outer periphery of the piston block 612. The piston block 612 is fixedly connected to the sealing ring 613. The sealing ring 613 is used to fill the gap between the outer peripheral wall of the piston block 612 and the wallpaper part in the piston chamber 614. The piston chamber 614 is connected to the mold cavity 31. A through hole 616 connected to the piston block 612 is provided on the cylinder body 611. The through hole 616 is located on the moving path of the piston.

[0027] A pressure sensor is fixed on the lower mold 4, and the pressure sensor is used to detect the pressure in the cavity 31. The switch element and the pressure sensor are not shown in the drawings of this embodiment.

[0028] During the casting process, holding furnace 2 is pressurized, causing the molten aluminum alloy to flow through riser tube 5 into cavity 31. Once the injection is complete, the switch element closes, allowing the solution in riser tube 5 to flow back into holding furnace 2. The piston advances toward upper mold 3, increasing the pressure within cavity 31 and solidifying the casting under high pressure.

[0029] See also Figure 3 The lower mold 4 is provided with an air duct 41, which surrounds the periphery of the cavity 31 and is spaced apart from the cavity 31. The air outlet and air inlet of the air duct 41 are located on opposite sides of the lower mold 4 along a horizontal distribution. A cooling fan 7 is fixed to the frame 1. The cooling fan 7 is located on the side of the cavity 31 near the air inlet of the air duct 41. The highest point of the cooling fan 7 is lower than the highest point of the lower mold 4, and the air inlet of the cooling fan 7 faces the air inlet of the air duct 41.

[0030] After the liquid is injected into the mold cavity 31, the cooling fan 7 is turned on to improve the solidification efficiency of the casting.

[0031] See also Figure 3 and Figure 4The lower mold 4 is provided with an air passage 42, which is located on the side of the air passage 41 close to the cavity 31. The air passage 42 connects the cavity 31 and the air passage 41. The lower mold 4 is rotatably connected with a cover plate 8, which is located on the side of the air passage 42 close to the cavity 31. The axis of rotation of the cover plate 8 is horizontal. The cover plate 8 rotates to control the connection between the air passage 42 and the cavity 31. The lower mold 4 is provided with a second driving member 9, which drives the cover plate 8 to rotate. Before injecting the aluminum alloy solution into the cavity 31, the second driving member 9 drives the cover plate 8 to rotate so that the cover plate 8 covers the air passage 42. At this time, the end of the cover plate 8 close to the cavity 31 is on the same plane as the inner wall of the cavity 31, and the cooling fan 7 works to accelerate the air flow rate in the air passage 41. After the casting is demolded, the driving member 2 9 drives the cover plate 8 to rotate, so that the cavity 31 and the air duct 42 are connected, and the air in the air duct 41 enters the cavity 31, which is beneficial to improve the cooling efficiency of the upper mold 3 and the lower mold 4 after the casting, and thus helps to improve production efficiency.

[0032] Reference Figure 3 and Figure 5 The cover plate 8 includes a plate body 81 and a connecting rod 82. The plate body 81 is rotatably connected to the lower mold 4. The plate body 81 rotates to control the connection between the airway 42 and the cavity 31. When the plate body 81 covers the airway 42, one end of the plate body 81 is located in the same plane as the inner wall of the cavity 31. The connecting rod 82 is located on the side of the plate body 81 away from the cavity 31. The connecting rod 82 is coaxially fixedly connected to the plate body 81. The connecting rod 82 and the plate body 81 are spliced ​​to form an angle. The angle formed by the splicing of the connecting rod 82 and the plate body 81 is an acute angle. A connecting column 821 is slidably connected to the connecting rod 82. The sliding direction of the connecting column 821 is parallel to the sliding direction of the connecting rod 82. The connecting column 821 is cylindrical and is rotatably connected to the connecting rod 82. The second driving member 9 is a driving rod 91, which is connected to the lower mold 4 for lifting and sliding. The driving rod 91 slides into or out of the upper end surface of the lower mold 4. The distribution direction of the connecting rod 82 and the driving rod 91 is perpendicular to the sliding direction of the connecting column 821. The distribution direction of the connecting rod 82 and the driving rod 91 is parallel to the rotation axis of the connecting column 821. The connecting column 821 is rotatably connected to the driving rod 91. The driving rod 91 drives the connecting rod 82 to rotate through the connecting column 821, thereby driving the plate body 81 to rotate.

[0033] See also Figure 4 and Figure 5 A filter plate 83 is coaxially fixedly connected to the plate body 81. The filter plate 83 is located between the plate body 81 and the connecting rod 82. The filter plate 83 and the plate body 81 are spliced ​​to form an angle. The angle between the filter plate 83 and the plate body 81 is smaller than the angle between the filter plate 83 and the connecting rod 82. The filter plate 83 is used to cover the airway 42. A water-absorbing layer 831 is fixed to the end of the filter plate 83 away from the cavity 31, which is beneficial to keeping the cavity 31 dry.

[0034] See also Figure 4A limit plate 43 is fixed on the inner wall of the air duct 42. The limit plate 43 is located between the plate body 81 and the filter plate 83. The limit plate 43 is located on the rotation path of the plate body 81 and the filter plate 83. The limit plate 43 is used to abut the plate body 81 or the filter plate 83 to limit the plate body 81 or the filter plate 83.

[0035] After the casting is demolded, the driving member 2 9 moves out of the lower mold 4, and drives the plate body 81 and the filter plate 83 to rotate toward the direction close to the cavity 31 through the connecting column 821. The plate body 81 opens the air channel 42, and the filter plate 83 covers the air channel 42. The air blown out by the cooling fan 7 passes through the filter plate 83 and enters the cavity 31 to cool the cavity 31. The impurities in the air are filtered through the filter net, which is beneficial to reduce the accumulation of impurities in the cavity 31 and the impurities on the surface of the casting, thereby improving the quality of the casting.

[0036] See also Figure 4 and Figure 5 The driving rod 91 includes a rod body 911 and an elastic sealing pad 912. The elastic sealing pad 912 is located above the rod body 911 and is fixedly connected to the rod body 911. The elastic sealing pad 912 is used to abut the upper mold 3. The upper end surface of the lower mold 4 is provided with a sliding groove 44. The rod body 911 and the elastic sealing pad 912 slide into or out of the sliding groove 44. An elastic member 45 is fixed to the lower mold 4. The elastic member 45 is a spring and is located in the sliding groove 44. The opposite ends of the elastic member 45 are respectively fixedly connected to the inner wall of the sliding groove 44 and the rod body 911. The elastic member 45 presses against the rod body 911, causing the rod body 911 to slide out of the sliding groove 44. The rod body 911 is rotatably connected to the connecting column 821.

[0037] During the casting process, the rod 911 partially extends out of the rod 911 under the action of the elastic member 45, and the elastic sealing gasket 912 is located outside the sliding groove 44. The driving member 11 drives the upper mold 3 to move closer to the lower mold 4. During this process, the upper mold 3 abuts the elastic sealing gasket 912, causing the elastic sealing gasket 912 and the rod 911 to move downward, and then drives the plate 81 and the filter screen to rotate through the connecting column 821, so that the plate 81 covers the end of the air outlet 32 ​​close to the cavity 31 to seal the cavity 31. The insulation furnace 2 is pressurized to inject the aluminum alloy solution into the cavity 31. When the cavity 31 is filled, the switch element closes the riser pipe 5, and the insulation furnace 2 is depressurized to cause the aluminum alloy solution in the riser pipe 5 to flow back into the insulation furnace 2. During the solidification process of the casting in the cavity 31, the air cylinder increases the pressure in the cavity 31, and the cooling fan 7 works to accelerate the air flow speed in the air duct 41, thereby improving the solidification efficiency of the casting.

[0038] When the casting solidifies, the driving member 11 drives the upper mold 3 to rise. After the casting is demolded, the rod body moves upward under the action of the elastic member 45, and then drives the plate body 81 and the filter plate 83 to rotate toward the direction close to the cavity 31, so that the plate body 81 opens the airway 42 and the filter plate 83 covers the airway 42, thereby cooling the inside of the cavity 31.

[0039] When the elastic sealing gasket 912 is inserted into the sliding groove 44, the elastic sealing gasket 912 presses against the inner wall of the sliding groove 44, and the resistance between the elastic sealing gasket 912 and the sliding groove 44 is smaller than the elastic force of the elastic member 45. This helps to reduce the pressure exerted by the plate 81 on the casting in the cavity 31 when the upper mold 3 moves away from the lower mold 4 and the casting has not yet been demolded.

[0040] The implementation principle of the aluminum alloy wheel hub casting equipment in the embodiment of the present application is: by installing a switch element and an air cylinder on the lower mold 4, the casting is solidified under high pressure while reducing the contact between the aluminum alloy solution and the riser tube 5, which is beneficial to improving the service life of the riser tube 5.

[0041] The above embodiment is only one of the preferred embodiments of the present invention and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An aluminum alloy wheel hub casting equipment, characterized by: The invention comprises a frame (1), a heat preservation furnace (2) arranged on the frame (1), a liquid riser (5), a lower mold (4) arranged on the frame (1), and an upper mold (3) connected to the frame (1) by lifting and sliding, the liquid riser (5) being connected to the heat preservation furnace (2) and the lower mold (4), the upper mold (3) and the lower mold (4) being spliced ​​to form a cavity (31), the liquid riser (5) communicating with the cavity (31) and the interior of the heat preservation furnace (2), the upper mold (3) being provided with a pressurizing member (6), the pressurizing member (6) being used to pressurize the cavity (31), the lower mold (4) being provided with a switch element, the switch element controlling the on-off between the liquid outlet of the liquid riser (5) and the cavity (31), the frame (1) being provided with a driving member (11), the driving member (11) driving the upper mold (3) to rise and fall.

2. The aluminum alloy wheel hub casting equipment according to claim 1, characterized in that: An air duct (41) is provided on the lower mold (4), and the air duct (41) is arranged around the mold cavity (31). A cooling fan (7) is provided on the frame (1), and the air outlet of the cooling fan (7) faces the air duct (41).

3. The aluminum alloy wheel hub casting equipment according to claim 2, characterized in that: An air duct (42) is provided on the lower mold (4), and the air duct (42) is connected to the air duct (41) and the mold cavity (31). A cover plate (8) is rotatably connected to the lower mold (4), and the cover plate (8) rotates to control the connection and disconnection between the air duct (42) and the air duct (41). A second driving member (9) is provided on the lower mold (4), and the second driving member (9) drives the cover plate (8) to rotate.

4. The aluminum alloy wheel hub casting equipment according to claim 3, characterized in that: The second driving member (9) is a driving rod (91), which slides out and extends into the lower mold (4). The driving rod (91) is located on the moving path of the upper mold (3). The cover plate (8) includes a plate body (81) rotatably connected to the lower mold (4) and a connecting rod (82) coaxially connected to the plate body (81). The connecting rod (82) and the plate body (81) are spliced ​​to form an angle. A connecting column (821) is slidably connected to the connecting rod (82), and the connecting column (821) is rotatably connected to the driving rod (91). The driving rod (91) drives the connecting rod (82) and the plate body (81) to rotate through the connecting column (821). An elastic member (45) is provided on the lower mold (4), and the elastic member (45) presses against the driving rod (91) so that the driving rod (91) has a tendency to slide out of the lower mold (4).

5. The aluminum alloy wheel hub casting equipment according to claim 4, characterized in that: A filter plate (83) is coaxially connected to the plate body (81), and the filter plate (83) and the plate body (81) are spliced ​​to form an angle, and the filter plate (83) rotates to cover the airway (42).

6. The aluminum alloy wheel hub casting equipment according to claim 5, characterized in that: A limiting plate (43) is provided on the inner wall of the air passage (42), and the cover plate (8) and the filter plate (83) are respectively located on opposite sides of the limiting plate (43).

7. The aluminum alloy wheel hub casting equipment according to claim 5, characterized in that: The filter plate (83) is provided with a water absorbing member.

8. The aluminum alloy wheel hub casting equipment according to claim 4, characterized in that: The driving rod (91) comprises a rod body (911) slidably connected to the lower mold (4) and an elastic sealing pad (912) provided on the rod body (911); the upper mold (3) abuts against the elastic sealing pad (912); and the elastic member (45) tightens the rod body (911) so that the rod body (911) has a tendency to move and extend out of the lower mold (4).

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