Rotor die-casting device

Abstract

A rotor die-casting device relates to rotor die-casting technical field, including die-casting machine and die-casting mould, the die-casting mould includes die-casting lower mould, die-casting middle mould and die-casting upper mould, and die-casting machine is equipped with rotary table, the pedestal is equipped with two mould closing cylinders, and the first piston rod and the second piston rod are respectively extended downward from two mould closing cylinders, the second piston rod is movably sleeved in the first piston rod, the lower end of the second piston rod is fixed with the stripping top pipe, the die-casting upper mould is movably sleeved in the lower part of the stripping top pipe, the stripping top pipe is equipped with the first boss that projects outward in the radial direction, the die-casting middle mould is movably sleeved outside the die-casting upper mould, the upper end of the die-casting upper mould is equipped with the second boss that projects outward in the radial direction, and the die-casting middle mould is detachably fixedly connected with the lower end of the first piston rod.The rotor die-casting device can improve rotor processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of rotor die casting technology, and in particular to a rotor die casting device. Background Technology

[0002] In motor manufacturing, traditional rotor die casting is labor-intensive and operates in a harsh environment. Current rotor die casting is typically performed on an aluminum die casting machine. Manual labor is required to insert rotor laminations into a dummy shaft and place them in the lower mold, then the middle mold, and finally the upper mold. Molten aluminum is then manually poured into an injection cylinder, and the assembled mold is pushed into the die casting machine's molten aluminum cylinder for die casting. After casting, the mold is removed, and the upper, middle, and lower molds are knocked open to remove the dummy shaft. Each step requires manual intervention, resulting in high labor intensity, low processing efficiency, and a risk of burns when handling the workpiece manually. Utility Model Content

[0003] In view of the defects existing in the prior art, the technical problem to be solved by this utility model is to provide a rotor die-casting device with less manual intervention, high processing efficiency and safety.

[0004] To solve the above-mentioned technical problems, this utility model provides a rotor die-casting device, including a die-casting machine and a die-casting mold. The die-casting mold includes a lower die, a middle die, and an upper die. A dummy shaft for mounting rotor laminations is fixed on the lower die, and an aluminum injection port is provided on the lower die. A platform and an aluminum liquid cylinder are fixed on the die-casting machine. An injection device for injecting aluminum liquid is provided inside the die-casting machine. The die-casting machine is equipped with a rotatable turntable. There are multiple lower dies, each symmetrically fixed on the turntable around the rotation axis of the turntable. The aluminum liquid cylinder is located below the turntable, and the lower die can rotate to be vertically aligned with the aluminum liquid cylinder. The platform is equipped with two mold-closing cylinders. The two mold-closing cylinders have a first piston rod and a second piston rod extending downwards respectively. The second piston rod is fitted inside the first piston rod in a movable manner. The lower end of the second piston rod is fixed with a demolding ejector tube. The die-casting upper mold has a through shaft hole. The lower part of the demolding ejector tube is inserted into the shaft hole of the die-casting upper mold in a movable fit. The upper part of the demolding ejector tube has a first boss that protrudes radially outward. The first boss interferes with the upward movement of the die-casting upper mold. The lower end of the demolding ejector tube can extend out of the lower port of the die-casting upper mold. The dummy shaft can extend upward into the cavity of the demolding ejector tube in a movable fit. The die-casting middle mold is fitted outside the die-casting upper mold in a movable fit manner. The rotor lamination fitted on the dummy shaft can extend upward into the cavity of the die-casting middle mold in a movable fit manner. The upper end of the die-casting upper mold is provided with a second boss that protrudes radially outward. The second boss interferes with the upward movement of the die-casting middle mold. The die-casting middle mold and the lower end of the first piston rod are fixedly connected in a detachable manner.

[0005] Furthermore, the upper end of the die-casting mold is provided with a third boss that protrudes radially outward. A connecting ring is fitted on the joint between the third boss and the first piston rod. The connecting ring is threadedly connected to the first piston rod. The lower end of the connecting ring is bent radially inward to the bottom of the third boss, forming an annular protrusion that slopes downward from the outside to the inside. The annular protrusion is in line contact with the third boss.

[0006] Furthermore, the die-casting lower mold is provided with a groove for engaging with the die-casting middle mold.

[0007] Furthermore, the upper end of the die-casting upper mold is fixed with an upper frame body that surrounds the demolding top tube. The upper frame body has an opening for the second piston rod and the demolding top tube to enter and exit. A top tube spring is provided between the first boss and the upper frame body. The top end of the top tube spring abuts against the upper frame body, and the bottom end of the top tube spring abuts against the first boss.

[0008] Furthermore, each die-casting lower mold is fixed to the turntable by multiple screws, and each screw is fitted with a lower mold spring.

[0009] The rotor die-casting device provided by this utility model utilizes a turntable with multiple workstations to place the rotor to be processed, realizing assembly line processing. It is equipped with two piston rods to control the movement of the die-casting mold and the demolding ejector. After die-casting is completed, the rotor is ejected by the demolding ejector by moving the die-casting mold upwards. Compared with the existing demolding methods, there is no need for manual knocking of the mold, the processing process requires less manual intervention, the processing efficiency is high, and it is safer. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the rotor die-casting device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the die-casting mold according to an embodiment of the present invention. Detailed Implementation

[0011] The embodiments of this utility model are described in further detail below with reference to the accompanying drawings. However, these embodiments are not intended to limit this utility model. Any similar structures or variations thereof that adopt this utility model should be included in the protection scope of this utility model. The commas in this utility model all indicate the relationship between and.

[0012] like Figures 1-2As shown in the figure, the rotor die-casting device provided by this utility model embodiment includes a die-casting machine 4 and a die-casting mold 1. The die-casting mold includes a lower die-casting mold 11, a middle die-casting mold 12 and an upper die-casting mold 13. A dummy shaft 35 for mounting rotor laminations is fixed on the lower die-casting mold 11. An aluminum injection port 111 is opened on the lower die-casting mold 11. A base 41 and an aluminum liquid cylinder 33 are fixed on the die-casting machine. An injection device (not shown in the figure) for injecting aluminum liquid is provided inside the die-casting machine 4. The die-casting machine 4 is equipped with a rotatable turntable 31. There are multiple die-casting lower molds 11, and each die-casting lower mold 11 is symmetrically fixed on the turntable 31 around the rotation axis of the turntable. The aluminum liquid cylinder 33 is located below the turntable 31, and the die-casting lower mold 11 can rotate to be directly opposite the aluminum liquid cylinder 33. The platform 41 is provided with two mold closing cylinders (not shown in the figure). The two mold closing cylinders have a first piston rod 18 and a second piston rod 17 extending downwards respectively. The second piston rod 17 is fitted inside the first piston rod 18 in a movable fit manner. The lower end of the second piston rod 17 is fixed with a demolding ejector tube 14. The die-casting upper mold 13 has a through shaft hole. The lower part of the demolding ejector tube 14 is inserted into the shaft hole of the die-casting upper mold 13 in a movable fit. The upper part of the demolding ejector tube 14 has a first boss 141 that protrudes radially outward. The first boss 141 interferes with the upward movement of the die-casting upper mold 13. The lower end of the demolding ejector tube 14 can extend out of the lower end of the die-casting upper mold 13. The dummy shaft 35 can extend upward into the cavity of the demolding ejector tube 14 in a movable fit. The die-casting middle mold 12 is fitted onto the die-casting upper mold 13 in a movable manner. The upper end of the die-casting upper mold 13 is provided with a second boss 131 that protrudes radially outward. The second boss 131 interferes with the upward movement of the die-casting middle mold 12. The die-casting middle mold 12 is fixedly connected to the lower end of the first piston rod 18 in a detachable manner.

[0013] In this embodiment of the present invention, the upper end of the die-casting mold 12 is provided with a third boss 121 that protrudes radially outward. A connecting ring 19 is sleeved on the joint between the third boss 121 and the first piston rod 18. The connecting ring 19 is threadedly connected to the first piston rod 18. The lower end of the connecting ring 19 is bent radially inward to below the third boss 121 to form an annular protrusion 191 that slopes downward from the outside to the inside. The annular protrusion 191 is in line contact with the third boss 121. The die-casting lower mold 11 is provided with a groove for engaging the die-casting middle mold 12; The upper end of the die-casting upper mold 13 is fixed with an upper frame 16 that surrounds the demolding top tube. The upper frame has an opening for the second piston rod 17 and the demolding top tube 14 to enter and exit. A top tube spring 15 is provided between the first boss 141 and the upper frame 16. The top end of the top tube spring 15 abuts against the upper frame 16, and the bottom end of the top tube spring 15 abuts against the first boss 141. Each die-casting lower mold 11 is fixed to the turntable 31 by a plurality of screws 34, and each screw 34 is fitted with a lower mold spring 32. This utility model embodiment is applicable to rotor die casting. In use, a robotic arm (not shown in the figure) is used to put the rotor laminations 22 to be processed onto the dummy shafts 35 of each die casting mold 11, and the robotic arm is used to scoop molten aluminum into the molten aluminum cylinder 33. The rotary table rotates a die-casting lower mold 11 to face the aluminum liquid cylinder 33. At this time, the two mold-closing cylinders are controlled to drive the first piston rod 18 and the second piston rod 17 to move down. The lower end of the die-casting middle mold 12 is inserted into the groove of the die-casting lower mold 11 to press the aluminum injection port 111 with the aluminum liquid cylinder 33. The die-casting upper mold 13 and the demolding top tube 14 apply pressure to the rotor punch 22 to press the rotor punch 22. Then the injection device of the die-casting machine 4 is started to inject aluminum liquid for die casting. After die casting is completed, the first piston rod 18 is driven to retract upwards. The die casting middle mold 12 is pulled away from the die casting lower mold 11 by the pulling force of the first piston rod 18, and the die-cast rotor is pulled away from the aluminum injection port 111 of the die casting lower mold 11. The lower mold spring 32 plays a buffering role. The connecting ring 19 moves upwards by the pulling force of the first piston rod 18, so that the contact line between the connecting ring 19 and the third boss 121 moves slightly downwards along the surface of the annular boss 191. The connecting ring 19 generates a radially inward and upward thrust on the die casting middle mold 12, so that the upper part of the die casting middle mold 12 narrows and the lower part of the die casting middle mold 12 widens, which facilitates demolding. The die-casting middle mold 12 moves upward to push the second boss 131, causing the die-casting upper mold 13 to move upward. The demolding ejector tube 14 moves upward under the pulling force of the die-casting upper mold 13 and the ejector tube spring 15. The die-casting upper mold 13 moves upward to push the first boss 141, causing the demolding ejector tube 14 to move upward until the ejector tube spring 15 is compressed. The demolding ejector tube 14 stops moving upward. As the die-casting middle mold 12 continues to move upward, the demolding ejector tube 14 and the ejector tube spring 15 exert downward force to gradually eject the rotor. After the rotor is ejected, the second piston rod 17 is retracted, and the turntable 31 is rotated to move the rotor away from the die-casting station, after which the rotor can be removed by a robotic arm.

Claims

1. A rotor die-casting apparatus, comprising a die-casting machine and a die-casting mold, the die-casting mold comprising a lower die-casting mold, a middle die-casting mold, and an upper die-casting mold, wherein a dummy shaft for mounting rotor laminations is fixed on the lower die-casting mold, and an aluminum injection port is provided on the lower die-casting mold; a base and an aluminum liquid cylinder are fixed on the die-casting machine, and an injection device for injecting aluminum liquid is provided inside the die-casting machine, characterized in that: The die-casting machine is equipped with a rotatable turntable. There are multiple die-casting lower molds, and each die-casting lower mold is symmetrically fixed on the turntable around the rotation axis. The aluminum liquid cylinder is located below the turntable, and the die-casting lower mold can rotate to be directly opposite the aluminum liquid cylinder. The platform is equipped with two mold-closing cylinders. The two mold-closing cylinders have a first piston rod and a second piston rod extending downwards respectively. The second piston rod is fitted inside the first piston rod in a movable manner. The lower end of the second piston rod is fixed with a demolding ejector tube. The die-casting upper mold has a through shaft hole. The lower part of the demolding ejector tube is inserted into the shaft hole of the die-casting upper mold in a movable fit. The upper part of the demolding ejector tube has a first boss that protrudes radially outward. The first boss interferes with the upward movement of the die-casting upper mold. The lower end of the demolding ejector tube can extend out of the lower port of the die-casting upper mold. The dummy shaft can extend upward into the cavity of the demolding ejector tube in a movable fit. The die-casting middle mold is fitted outside the die-casting upper mold in a movable fit manner. The rotor lamination fitted on the dummy shaft can extend upward into the cavity of the die-casting middle mold in a movable fit manner. The upper end of the die-casting upper mold is provided with a second boss that protrudes radially outward. The second boss interferes with the upward movement of the die-casting middle mold. The die-casting middle mold and the lower end of the first piston rod are fixedly connected in a detachable manner.

2. The rotor die-casting apparatus according to claim 1, characterized in that: The upper end of the die-casting mold is provided with a third boss that protrudes radially outward. A connecting ring is fitted on the joint between the third boss and the first piston rod. The connecting ring is threadedly connected to the first piston rod. The lower end of the connecting ring is bent radially inward to the bottom of the third boss, forming an annular protrusion that slopes downward from the outside to the inside. The annular protrusion is in line contact with the third boss.

3. The rotor die-casting apparatus according to claim 1, characterized in that: The die-casting lower mold is provided with a groove for engaging with the die-casting middle mold.

4. The rotor die-casting apparatus according to claim 1, characterized in that: The upper end of the die-casting mold is fixed with an upper frame that surrounds the demolding top tube. The upper frame has an opening for the second piston rod and the demolding top tube to enter and exit. A top tube spring is provided between the first boss and the upper frame. The top end of the top tube spring abuts against the upper frame, and the bottom end of the top tube spring abuts against the first boss.

5. The rotor die-casting apparatus according to claim 1, characterized in that: Each die-casting lower mold is fixed to the turntable by multiple screws, and each screw is fitted with a lower mold spring.

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