Automatic die casting equipment for automobile aluminum alloy motor shell

Abstract

The invention relates to the technical field of casing die-casting, in particular to automatic die-casting equipment for an automobile aluminum alloy motor casing, which comprises a rack and a die-casting roller body, and a lower die is arranged on the die-casting roller body; an arc-shaped groove is formed in the rack along the axis of the die-casting roller body, a support is arranged on the arc-shaped groove in the extending direction of the arc-shaped groove in a sliding mode, the support can synchronously rotate along with the die-casting roller body, and an upper die moving in the radial direction of the die-casting roller body is arranged below the support. A linear driver used for driving the upper die to descend and to be closed with the lower die is arranged on the support, a cooling unit is arranged in the die-casting roller body, the higher end of the arc-shaped groove is called as a first end, the lower end of the arc-shaped groove is called as a second end, and when the support is located at the first end, the upper die and the lower die are closed. The upper mold is separated from the lower mold. In the die-casting process, the die-casting roller body is in a rotating state all the time, and compared with a traditional automatic die-casting process, the efficiency is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of shell die-casting, and more particularly to an automatic die-casting device for automotive aluminum alloy motor housings. Background Art

[0002] When producing automotive aluminum alloy motor housings, die-casting process is mainly used for processing. At present, die-casting equipment can only achieve semi-automatic production, and can only die-cast and form a single aluminum housing. After die-casting and forming, manual subsequent taking is required, and the overall production efficiency needs to be improved.

[0003] Chinese Patent Publication No. CN220574695U discloses an automatic die-casting device for the production of automotive compressor aluminum housings, including a compressor circulating die-casting machine, a vibration motor, a production line conveyor belt, and a housing placement box. On both sides above the compressor circulating die-casting machine, vibration motors are fixedly installed correspondingly. Below the compressor circulating die-casting machine, there is a production line conveyor belt, and housing placement boxes are distributed on the production line conveyor belt; The compressor circulating die-casting machine includes a frame, a cross plate, a die-casting cylinder, an upper mold die-casting plate, an upper mold, a pouring assembly, a die-casting machine housing, a die-casting notch, a discharge cylinder, a die-casting roller body, a lower mold, a die-casting motor, an outer frame, a cleaning air pump, and a cleaning nozzle group. In the middle above the frame, a cross plate is fixedly installed, and vibration motors are fixedly installed on the outer sides above. On the cross plate, a die-casting cylinder is fixedly installed. The output end of the die-casting cylinder is fixedly installed with an upper mold die-casting plate, and several upper molds are fixedly installed on the upper mold die-casting plate. The upper mold is communicated with the pouring assembly, and the pouring assembly is installed on the cross plate; Between the frames, a die-casting machine housing is fixedly installed. Above the die-casting machine housing, there is a die-casting notch adapted to the upper mold die-casting plate. Below the die-casting machine housing, a discharge cylinder is fixedly installed, and the number of discharge cylinders is the same as that of the upper molds. Inside the die-casting machine housing, a die-casting roller body is rotatably installed. Any end of the die-casting roller body rotates through the die-casting machine housing, the frame, and the outer frame and is fixedly connected to the output end of the die-casting motor. On the surface of the die-casting roller body, a lower mold is fixedly installed; The die-casting motor is fixedly installed on the outer frame, the outer frame is fixedly installed on the frame, a cleaning air pump is fixedly installed on the outer frame, the cleaning air pump is connected to the cleaning nozzle group through a pipeline, the cleaning nozzle group is fixedly installed at a position on one side inside the die-casting machine housing, and below the die-casting machine housing, there is a production line conveyor belt.

[0004] The above solution provides a cyclic automatic die-casting device, which mainly relies on the rotation of the die-casting roll body to achieve automatic die-casting and discharging. However, after die-casting, it is necessary to cool the molten metal to solidify it. The existing cyclic automatic die-casting device needs to stop rotating when waiting for the molten metal to cool down, and the rotational conveying advantage of the die-casting roll body is greatly reduced due to the cooling of the molten metal. At the same time, in order to ensure the efficiency of automatic die-casting, the waiting time for the metal to cool is shorter than that of traditional die-casting cooling. As a result, the temperature of the motor housing just discharged from the lower mold is relatively high, and the heat resistance performance requirements for the conveyor belt are relatively high. The conveyor belt is in a high-temperature working environment for a long time, and its service life will also be reduced. Summary of the Invention

[0005] In view of the above problems, an automatic die-casting device for automotive aluminum alloy motor housings is provided. An arc-shaped groove is opened on the frame, and a bracket is arranged on the arc-shaped groove. When the die-casting roll body drives the lower mold to rotate to directly below the upper mold, the bracket rotates synchronously with the die-casting roll body, and the bracket moves from the first end of the arc-shaped groove to the second end. At the same time, a linear actuator drives the upper mold to descend, and the upper mold and the lower mold are closed to form a mold cavity. Then, molten metal is injected into the mold cavity. After the mold cavity is filled with the molten metal, the molten metal is cooled. Before the bracket reaches the second end of the arc-shaped groove, the cooling of the molten metal is completed. After cooling, the upper mold and the lower mold are separated. Then, the die-casting roll body continues to rotate, and the bracket returns from the second end of the arc-shaped groove to the first end. The lower mold that continues to rotate with the die-casting cabinet discharges the automotive aluminum alloy motor housing.

[0006] To solve the problems of the prior art, the present invention provides an automatic die-casting device for automotive aluminum alloy motor housings, which includes a frame and a die-casting roll body rotatably arranged on the frame. A lower mold is arranged on the die-casting roll body. An arc-shaped groove is opened on the frame along the axis of the die-casting roll body. A bracket is slidably arranged on the arc-shaped groove along the extending direction of the arc-shaped groove. The bracket can rotate synchronously with the die-casting roll body. An upper mold that moves in the radial direction of the die-casting roll body is arranged below the bracket. A linear actuator for driving the upper mold to descend and close with the lower mold is arranged on the bracket. A cooling unit is arranged in the die-casting roll body. The higher end of the arc-shaped groove is called the first end, and the lower end is called the second end. When the bracket is located at the first end, the upper mold and the lower mold are closed. When the bracket is located at the second end, the upper mold and the lower mold are separated.

[0007] Preferably, an extension rod that rises and falls synchronously with the upper mold is vertically arranged on one side of the upper mold. A pushing block that can push the extension rod is fixedly arranged on the die-casting roll body. The lower end height of the extension rod is lower than the lower end height of the upper mold.

[0008] Preferably, a reset unit is provided at one end of the bracket. The reset unit includes a rotating arm hinged to the end of the bracket. The length direction of the rotating arm is parallel to the radial direction of the die-casting roll body, and the rotating arm rotates around the axis of the die-casting roll body. A heavy object is movably arranged vertically on one side of the frame. A transmission unit is arranged between the heavy object and the rotating arm, and the heavy object drives the rotating arm to rotate through the transmission unit.

[0009] Preferably, the transmission unit includes a toothed ring rotating along the axis of the die-casting roll body. The toothed ring is fixedly connected to the end of the rotating arm. A rack is vertically and fixedly arranged below the heavy object, and the rack meshes with a gear.

[0010] Preferably, a damping shell is vertically and fixedly arranged on the frame. A ventilation hole is penetrated through the side wall of the damping shell. A damping rod is vertically and fixedly arranged at the bottom of the heavy object. The damping rod extends into the damping shell and is slidably matched with the damping shell.

[0011] Preferably, a switching valve is arranged at the lower part of the damping shell.

[0012] Preferably, a pressure sensor for detecting the pressure of the bracket is arranged above the second end of the arc-shaped groove.

[0013] Preferably, a spring is vertically arranged between the pressure sensor and the second end of the arc-shaped groove. The two ends of the spring are respectively fixedly connected to the second end of the arc-shaped groove and the pressure sensor.

[0014] Preferably, a discharge plate is obliquely arranged below the frame. A plurality of rollers are rotatably arranged on the discharge plate along the extending direction of the discharge plate.

[0015] Preferably, a plurality of blowers for blowing air to the lower die after unloading are arranged on the frame.

[0016] The beneficial effects of the present invention compared with the prior art are as follows: 1. In the present invention, an arc-shaped groove is opened on the frame, and a bracket is arranged on the arc-shaped groove. When the die-casting roll body drives the lower die to rotate to the directly below of the upper die, the bracket rotates synchronously with the die-casting roll body, and the bracket moves from the first end of the arc-shaped groove to the second end. At the same time, the linear actuator drives the upper die to descend, and the upper die and the lower die are closed to form a mold cavity. Then, molten metal is injected into the mold cavity. After the mold cavity is filled with the molten metal, the molten metal is cooled. Before the bracket reaches the second end of the arc-shaped groove, the cooling of the molten metal is completed. After cooling, the upper die and the lower die are separated. Then, the die-casting roll body continues to rotate, and the bracket is reset from the second end of the arc-shaped groove to the first end. The lower die that continues to rotate with the die-casting body discharges the automotive aluminum alloy motor housing. In summary, during the die-casting process of the present invention, the die-casting roll body is always in a rotating state, and the efficiency is higher than that of the traditional automatic die-casting process.

[0017] 2. By setting the pushing block and the extension rod, and by changing the extended length of the output end of the linear actuator, while controlling the closing or separation of the upper die and the lower die, the bracket can be made to rotate synchronously with the die-casting roller body. And before the bracket reaches the second end of the arc-shaped groove, the extension rod is withdrawn from the annular sweeping area of the pushing block, so as to realize the continuous rotation of the die-casting roller body and the reset rotation of the bracket.

[0018] 3. By setting the damping shell and the damping rod, when the heavy object descends, the damping rod descends synchronously with the heavy object. The damping rod squeezes the air in the damping shell, and the air in the damping shell is discharged from the vent hole. Since the aperture of the vent hole is small, the vent hole produces an overflow effect on the discharged air, so as to achieve the deceleration effect when the heavy object descends, and avoid the bracket hitting the first end of the arc-shaped groove due to too fast moving speed. At the same time, a switching valve is arranged at the bottom of the damping shell. When the bracket rotates synchronously with the die-casting roller body, the switching valve is opened, and the vent hole will not produce a damping effect on the rotating bracket. Description of the Drawings

[0019] Figure 1 is a three-dimensional schematic view of an automatic die-casting device for an automotive aluminum alloy motor housing of the present invention Figure 1 .

[0020] Figure 2 is an enlarged partial schematic view at A of an automatic die-casting device for an automotive aluminum alloy motor housing of the present invention Figure 1 in.

[0021] Figure 3 is a side view of an automatic die-casting device for an automotive aluminum alloy motor housing of the present invention

[0022] Figure 4 is an automatic die-casting device for an automotive aluminum alloy motor housing of the present invention Figure 3 in the sectional schematic view taken along B-B.

[0023] Figure 5 is an automatic die-casting device for an automotive aluminum alloy motor housing of the present invention Figure 4 in the enlarged partial schematic view at C.

[0024] Figure 6 is a cutaway three-dimensional schematic view of an automatic die-casting device for an automotive aluminum alloy motor housing of the present invention

[0025] Figure 7 is an automatic die-casting device for an automotive aluminum alloy motor housing of the present invention Figure 6 in the enlarged partial schematic view at D.

[0026] Figure 8 is a three-dimensional schematic view of an automatic die-casting device for an automotive aluminum alloy motor housing of the present invention Figure 2 .

[0027] Figure 9 It is a three-dimensional schematic diagram of an automatic die-casting equipment for an automotive aluminum alloy motor housing after removing the housing according to the present invention.

[0028] Figure 10 It is a three-dimensional schematic diagram of an automatic die-casting equipment for an automotive aluminum alloy motor housing after removing the housing and when a part of the output end of the linear driver extends out according to the present invention.

[0029] Figure 11 It is an automatic die-casting equipment for an automotive aluminum alloy motor housing according to the present invention Figure 10 The partial enlarged schematic diagram at position E in

[0030] The reference numerals in the figure are: 1. Frame; 11. Arc-shaped groove; 111. Pressure sensor; 112. Spring; 12. Bracket; 13. Linear driver; 14. Upper die; 15. Extension rod; 16. Pushing block; 17. Reset unit; 171. Rotating arm; 172. Heavy object; 173. Transmission unit; 1731. Tooth ring; 1732. Rack; 174. Damping shell; 1741. Vent hole; 175. Damping rod; 176. Switch valve; 18. Discharge plate; 181. Roller; 19. Fan; 2. Die-casting roller body; 21. Lower die; 22. Cooling unit; 3. Motor housing. Specific embodiments

[0031] In order to further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0032] Refer to Figures 1 - 4 And Figure 7 : An automatic die-casting equipment for an automotive aluminum alloy motor housing, including a frame 1 and a die-casting roller body 2 rotatably arranged on the frame 1, and a lower die 21 is arranged on the die-casting roller body 2; an arc-shaped groove 11 is opened on the frame 1 along the axis of the die-casting roller body 2, and a bracket 12 is slidably arranged on the arc-shaped groove 11 along the extending direction of the arc-shaped groove 11. The bracket 12 can rotate synchronously with the die-casting roller body 2. An upper die 14 moving in the radial direction of the die-casting roller body 2 is arranged below the bracket 12. A linear driver 13 for driving the upper die 14 to descend and close with the lower die 21 is arranged on the bracket 12. A cooling unit 22 is arranged in the die-casting roller body 2. The higher end of the arc-shaped groove 11 is called the first end, and the lower end is called the second end. When the bracket 12 is located at the first end, the upper die 14 and the lower die 21 are closed. When the bracket 12 is located at the second end, the upper die 14 and the lower die 21 are separated.

[0033] During the processing of the automotive aluminum alloy motor housing 3, the existing processing methods mostly adopt a single die-casting method. After die-casting, workers are still required to take out the die-cast automotive aluminum alloy motor housing 3, resulting in limited output. To increase production and meet market demand, an automatic die-casting device for automotive aluminum alloy motor housings 3 has been designed in the prior art. For example, an automatic die-casting device for the production of an aluminum housing of an automotive compressor disclosed in Chinese Patent Publication No. CN220574695U includes a die-casting roller body 2. The lower die 21 is arranged on the die-casting roller body 2, and at the same time, the upper die 14 is arranged above the die-casting roller body 2. The die-casting roller body 2 is rotated. When the die-casting roller body 2 drives the lower die 21 to rotate to the exact lower position of the upper die 14, the upper die 14 closes on the lower die 21. At this time, the die-casting roller body 2 stops rotating, and the upper die 14 and the lower die 21 form a mold cavity. Molten metal is injected into the mold cavity. After the molten metal cools, the upper die 14 and the lower die 21 are separated. The die-casting roller body 2 drives the lower die 21 to rotate, and the lower die 21 drives the cooled and solidified automotive aluminum alloy motor housing 3 to rotate 180 degrees. Subsequently, the aluminum alloy motor housing 3 is discharged from the lower die 21. Although this device avoids manual blanking and reduces the labor intensity, the preparation efficiency has not been improved. This is because after the upper die 14 and the lower die 21 are closed, the die-casting roller body 2 needs to stop rotating. The die-casting roller body 2 needs to wait for the injection and cooling and solidification of the molten metal. And after the upper die 14 and the lower die 21 are separated, the rotation speed of the die-casting roller body 2 cannot be too fast, otherwise the automotive aluminum alloy motor housing 3 in the lower die 21 is likely to be thrown out, resulting in damage to the aluminum alloy motor housing 3. Therefore, the overall preparation efficiency is low. At the same time, the discharged aluminum alloy motor housing 3 is conveyed by a belt conveyor, which requires a high heat-resistant performance for the conveyor belt, and the service life of the conveyor belt is low.

[0034] To avoid the above situation, the existing automatic die-casting device is redesigned so that the die-casting roller body 2 does not need to stop when injecting molten metal and cooling the molten metal, improving the die-casting efficiency. The specific structure and working process of the present invention are as follows: The die-casting roll body 2 is driven by a magnetic ring drive, and other drive devices can also be used for driving according to actual situations. The higher end of the arc-shaped groove 11 is called the first end, and the lower end is called the second end. When the bracket 12 is located at the first end, the linear drive 13 provided on the bracket 12 is in a vertical state. When the bracket 12 is located at the second end, the linear drive 13 provided on the bracket 12 is in a horizontal state. The cooling unit 22 is mainly composed of cooling pipelines. The cooling unit 22 is prior art and will not be elaborated here. During die-casting operations, the die-casting roll body 2 is in a continuous rotation state. There are two groups of lower dies 21 provided on the die-casting roll body 2, and each group is provided with a plurality of lower dies 21 arranged along the axis direction of the die-casting roll body 2. Before the lower die 21 reaches directly below the upper die 14, the linear drive 13 is in a contracted state, and the upper die 14 is in a lifted state. At this time, the bracket 12 is located at the first end of the arc-shaped groove 11. When the die-casting roll body 2 drives one group of lower dies 21 to rotate directly below the upper die 14, the bracket 12 begins to rotate synchronously with the die-casting roll body 2, and at this time, the linear drive 13 drives the upper die 14 to descend. Since the bracket 12 rotates synchronously with the die-casting roll body 2, the bracket 12 and the die-casting roll body 2 are relatively stationary, and the upper die 14 and the lower die 21 always remain aligned. After the upper die 14 and the lower die 21 are closed, a mold cavity is formed, and then the molten metal is injected into the mold cavity. After the mold cavity is filled with the molten metal, the cooling unit 22 starts to operate, and the cooling unit 22 cools the molten metal in the mold cavity. The above-mentioned process of injecting the molten metal is prior art, and the specific working principle will not be elaborated in detail. Since the rotation speed of the die-casting roll body 2 is relatively slow, during the process of the bracket 12 rotating with the die-casting roll body 2 from the first end of the arc-shaped groove 11 to the second end of the arc-shaped groove 11, the molten metal located in the mold cavity can complete cooling and solidification. And when the bracket 12 reaches the second end of the arc-shaped groove 11, the upper die 14 and the lower die 21 have already been separated. At this time, the die-casting roll body 2 continues to rotate, and the bracket 12 drives the upper die 14 to move back to the first end from the second end of the arc-shaped groove 11, and the bracket 12 stops moving after reaching the first end of the arc-shaped groove 11. It should be noted that when the bracket 12 is at the first end of the arc-shaped groove 11, the linear drive 13 is in a vertical state; when the bracket 12 is at the second end of the arc-shaped groove 11, the linear drive 13 is in a horizontal state, that is, the opening of the lower die 21 is also in a horizontal state at this time. As the die-casting roll body 2 continues to rotate, the opening of the lower die 21 carrying the motor housing 3 begins to tilt downward, and the motor housing 3 provided in the lower die 21 can be discharged from the lower die 21.

[0035] By providing an arc-shaped groove 11 on the rack 1 and arranging a bracket 12 on the arc-shaped groove 11, when the die-casting roller body 2 drives the lower die 21 to rotate to directly below the upper die 14, the bracket 12 rotates synchronously with the die-casting roller body 2, and the bracket 12 moves from the first end to the second end of the arc-shaped groove 11. At the same time, the linear actuator 13 drives the upper die 14 to descend, and the upper die 14 and the lower die 21 are closed to form a mold cavity. Subsequently, molten metal is injected into the mold cavity. After the mold cavity is filled with the molten metal, the molten metal is cooled. Before the bracket 12 reaches the second end of the arc-shaped groove 11, the cooling of the molten metal is completed. After cooling, the upper die 14 and the lower die 21 are separated. Subsequently, the die-casting roller body 2 continues to rotate, and the bracket 12 is reset from the second end to the first end of the arc-shaped groove 11. The lower die 21 that continues to rotate with the die-casting cabinet body discharges the automotive aluminum alloy motor housing 3. In summary, during the die-casting process of the present invention, the die-casting roller body 2 is always in a rotating state, and the efficiency is higher compared to the traditional automatic die-casting process.

[0036] Refer to Figure 11 : An extension rod 15 that rises and falls synchronously with the upper die 14 is vertically arranged on one side of the upper die 14. A pushing block 16 that can push the extension rod 15 is fixedly arranged on the die-casting roller body 2. The height of the lower end of the extension rod 15 is lower than the height of the lower end of the upper die 14.

[0037] When the pushing block 16 arranged on the die-casting roller body 2 rotates with the die-casting roller body 2, it will form an annular sweeping area. The linear actuator 13 has three states when driving the upper die 14 to move. One is that the output end of the linear actuator 13 is fully retracted. At this time, the upper die 14 and the lower die 21 are separated from each other, and the lower end of the extension rod 15 does not invade the annular sweeping area of the pushing block 16. The second is that the output end of the linear actuator 13 is partially retracted. At this time, the upper die 14 and the lower die 21 are still in a separated state, but the lower end of the extension rod 15 invades the annular sweeping area of the pushing block 16. When the die-casting roller body 2 rotates, the pushing block 16 can contact the extension rod 15, and when the pushing block 16 contacts the extension rod 15, the upper die 14 and the lower die 21 are aligned. After the pushing block 16 contacts the extension rod 15, the pushing block 16 pushes the extension rod 15, so that the bracket 12 rotates synchronously with the die-casting roller body 2. The third is that the output end of the linear actuator 13 is fully extended, and the upper die 14 and the lower die 21 are fully closed. At this time, the extension rod 15 is still in the annular sweeping area of the pushing block 16, and the pushing block 16 can still push the extension rod 15, so that the bracket 12 rotates synchronously with the die-casting roller body 2.

[0038] During the processing, the bracket 12 is first placed at the first end of the arc-shaped groove 11. At this time, a part of the output end of the linear actuator 13 extends out, and the lower end of the extension rod 15 intrudes into the annular sweeping area of the pushing block 16. As the die-casting roller body 2 rotates, the pushing block 16 contacts the extension rod 15 and pushes the bracket 12 to rotate synchronously. At the same time, the linear actuator 13 starts to push the upper die 14 towards the lower die 21 and finally closes. At this time, the output end of the linear actuator 13 completes its extension. When the molten metal is injected into the mold cavity and cooled, the output end of the linear actuator 13 retracts completely, the upper die 14 separates from the lower die 21, and the extension rod 15 withdraws from the annular sweeping area of the pushing block 16. Then the bracket 12 can move back from the second end of the arc-shaped groove 11 to the first end of the arc-shaped groove 11.

[0039] By setting the pushing block 16 and the extension rod 15, and by changing the extension length of the output end of the linear actuator 13, it is realized that while controlling the closing or separation of the upper die 14 and the lower die 21, the bracket 12 can rotate synchronously with the die-casting roller body 2, and before the bracket 12 reaches the second end of the arc-shaped groove 11, the extension rod 15 withdraws from the annular sweeping area of the pushing block 16, thus achieving the effect that the die-casting roller body 2 continues to rotate and the bracket 12 rotates for reset.

[0040] Refer to Figure 9 and Figure 10 : A reset unit 17 is provided at one end of the bracket 12. The reset unit 17 includes a rotating arm 171 hinged to the end of the bracket 12. The length direction of the rotating arm 171 is parallel to the radial direction of the die-casting roller body 2, and the rotating arm 171 rotates around the axis of the die-casting roller body 2. A heavy object 172 is movably arranged vertically on one side of the frame 1. A transmission unit 173 is provided between the heavy object 172 and the rotating arm 171, and the heavy object 172 drives the rotating arm 171 to rotate through the transmission unit 173.

[0041] Refer to Figure 9 : The transmission unit 173 includes a toothed ring 1731 rotating along the axis of the die-casting roller body 2. The toothed ring 1731 is fixedly connected to the end of the rotating arm 171. A rack 1732 is vertically and fixedly arranged below the heavy object 172, and the rack 1732 meshes with a gear.

[0042] When the bracket 12 rotates synchronously with the die-casting roll body 2, the bracket 12 moves from the first end of the arc-shaped groove 11 to the second end of the arc-shaped groove 11. The moving bracket 12 drives the rotating arm 171 to rotate. The toothed ring 1731 starts to rotate under the drive of the rotating arm 171. The toothed ring 1731 drives the rack 1732 to rise in the vertical direction. The heavy object 172 gradually rises under the action of the rack 1732. When the extension rod 15 withdraws from the annular sweeping area of the pushing block 16, the heavy object 172 generates a rotational force on the toothed ring 1731 through the rack 1732, so that the rotating arm 171 drives the bracket 12 to reset from the second end of the arc-shaped groove 11 to the first end of the arc-shaped groove 11.

[0043] Refer to Figure 5 and Figure 6 : A damping shell 174 is vertically and fixedly arranged on the frame 1. A vent hole 1741 is penetrated and opened on the side wall of the damping shell 174. A damping rod 175 is vertically and fixedly arranged at the bottom of the heavy object 172. The damping rod 175 extends into the damping shell 174 and is slidably matched with the damping shell 174.

[0044] Since the reset movement of the bracket 12 is realized by the own weight of the heavy object 172, when the heavy object 172 descends, the descending speed of the heavy object 172 will gradually increase, resulting in the rotation speed of the bracket 12 gradually increasing during the reset process of the bracket 12, and it is easy to collide with the first end of the arc-shaped groove 11 when the bracket 12 reaches the first end of the arc-shaped groove 11. In order to avoid the collision between the bracket 12 and the first end of the arc-shaped groove 11, the damping shell 174 and the damping rod 175 are provided. When the heavy object 172 descends, the damping rod 175 descends synchronously with the heavy object 172. The damping rod 175 squeezes the air in the damping shell 174, and the air in the damping shell 174 is discharged from the vent hole 1741. Since the aperture of the vent hole 1741 is small, the vent hole 1741 produces an overflow effect on the discharged air, thereby achieving the deceleration effect when the heavy object 172 descends and avoiding the bracket 12 hitting the first end of the arc-shaped groove 11 due to too fast moving speed.

[0045] Refer to Figure 5 : A switching valve 176 is arranged at the lower part of the damping shell 174.

[0046] If the bottom of the damping housing 174 is not provided with a switching valve 176, when the bracket 12 rotates synchronously with the die-casting roll body 2, the outside air can only enter the damping housing 174 through the vent holes 1741. The vent holes 1741 produce an overflow effect on the outside air, resulting in that the die-casting roll body 2 is easily affected by damping when driving the bracket 12 to rotate, and further causing a large force between the push block 16 and the extension rod 15. After the switching valve 176 is provided, when the bracket 12 needs to rotate synchronously with the die-casting roll body 2, the switching valve 176 provided at the bottom of the damping housing 174 is opened, and the outside air enters the damping housing 174 through the switching valve 176, and the vent holes 1741 no longer overflow the outside air. When the bracket 12 needs to be reset, the switching valve 176 is closed, and the vent holes 1741 perform overflow.

[0047] Refer to Figure 2 : A pressure sensor 111 for detecting the pressure of the bracket 12 is provided above the second end of the arc-shaped groove 11.

[0048] By providing the pressure sensor 111 above the second end of the arc-shaped groove 11, when the bracket 12 rotates with the die-casting roll body 2 and presses the pressure sensor 111, the linear actuator 13 drives the upper die 14 to completely contract, so that the upper die 14 is separated from the lower die 21, and at the same time, the extension rod 15 withdraws from the annular sweeping area of the push block 16.

[0049] Refer to Figure 2 : A spring 112 is vertically provided between the pressure sensor 111 and the second end of the arc-shaped groove 11, and both ends of the spring 112 are fixedly connected to the second end of the arc-shaped groove 11 and the pressure sensor 111 respectively.

[0050] After the spring 112 is provided, when the bracket 12 rotates with the die-casting roll body 2 and triggers the pressure sensor 111, the die-casting roll body 2 does not need to stop rotating. During the process of separating the upper die 14 from the lower die 21, the spring 112 is gradually compressed, and the bracket 12 rotates synchronously with the die-casting roll body 2. When the extension rod 15 completely withdraws from the annular sweeping area of the push block 16, the bracket 12 starts to move for reset, and the spring 112 returns from the compressed state.

[0051] Refer to Figure 8 : A discharge plate 18 is inclinedly provided below the frame 1, and a plurality of rollers 181 are rotatably provided on the discharge plate 18 along the extending direction of the discharge plate 18.

[0052] When the die-casting roll body 2 drives the lower die 21 to rotate and discharges the formed motor housing 3, the motor housing 3 falls on the rollers 181 instead of directly falling on the belt conveyor. A belt conveyor is provided below the discharge plate 18. Through the conveyance of the rollers 181, the motor housing 3 is cooled again in the air, thereby reducing the thermal damage of the temperature of the motor housing 3 to the belt conveyor.

[0053] Refer to Figure 6 and Figure 8 : A plurality of blowers 19 for blowing air to the lower die 21 after unloading are provided on the rack 1.

[0054] Working principle: During die-casting operation, the die-casting roll body 2 is in a continuous rotating state. There are two groups of lower dies 21 provided on the die-casting roll body 2, and each group is provided with a plurality of lower dies 21 arranged along the axis direction of the die-casting roll body 2. Before the lower die 21 reaches directly below the upper die 14, the linear actuator 13 is in a contracted state, the upper die 14 is in a lifted state, and the bracket 12 is located at the first end of the arc-shaped groove 11 at this time. When the die-casting roll body 2 drives one group of lower dies 21 to rotate directly below the upper die 14, the bracket 12 starts to rotate synchronously with the die-casting roll body 2, and at this time the linear actuator 13 drives the upper die 14 to descend. Since the bracket 12 rotates synchronously with the die-casting roll body 2, the bracket 12 and the die-casting roll body 2 are relatively stationary, and the upper die 14 and the lower die 21 always remain aligned. After the upper die 14 and the lower die 21 are closed, a die cavity is formed, and then molten metal is injected into the die cavity. After the molten metal fills the die cavity, the cooling unit 22 starts to operate, and the cooling unit 22 cools the molten metal in the die cavity. The above-mentioned molten metal injection process is prior art, and the specific working principle will not be elaborated here. Since the rotation speed of the die-casting roll body 2 is relatively slow, during the process that the bracket 12 rotates with the die-casting roll body 2 from the first end of the arc-shaped groove 11 to the second end of the arc-shaped groove 11, the molten metal located in the die cavity can complete cooling and solidification, and when the bracket 12 reaches the second end of the arc-shaped groove 11, the upper die 14 and the lower die 21 have been separated. At this time, the die-casting roll body 2 continues to rotate, while the bracket 12 drives the upper die 14 to move back from the second end of the arc-shaped groove 11 to the first end, and the bracket 12 stops moving after reaching the first end of the arc-shaped groove 11. It should be noted that when the bracket 12 is at the first end of the arc-shaped groove 11, the linear actuator 13 is in a vertical state; when the bracket 12 is at the second end of the arc-shaped groove 11, the linear actuator 13 is in a horizontal state, that is, the opening of the lower die 21 is also in a horizontal state at this time. As the die-casting roll body 2 continues to rotate, the opening of the lower die 21 carrying the motor housing 3 starts to tilt downward, and the motor housing 3 provided in the lower die 21 can be discharged from the lower die 21.

[0055] The above embodiments only represent one or several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but should not be construed as a limitation on the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An automatic die-casting device for an automotive aluminum alloy motor housing, comprising a frame (1) and a die-casting roller body (2) rotatably arranged on the frame (1), and a lower die (21) is arranged on the die-casting roller body (2); It is characterized in that An arc-shaped groove (11) is formed on the frame (1) along the axis of the die-casting roller body (2). A bracket (12) is slidably arranged on the arc-shaped groove (11) along the extending direction of the arc-shaped groove (11). The bracket (12) can rotate synchronously with the die-casting roller body (2). An upper die (14) is arranged below the bracket (12) and moves in the radial direction of the die-casting roller body (2). A linear driver (13) is arranged on the bracket (12) for driving the upper die (14) to descend and close with the lower die (21). A cooling unit (22) is arranged inside the die-casting roller body (2). The higher end of the position of the arc-shaped groove (11) is called the first end, and the lower end is called the second end. When the bracket (12) is located at the first end, the upper die (14) and the lower die (21) are closed. When the bracket (12) is located at the second end, the upper die (14) and the lower die (21) are separated.

2. The automatic die-casting equipment for an automotive aluminum alloy motor housing according to claim 1, characterized in that, An extension rod (15) that rises and falls synchronously with the upper die (14) is vertically arranged on one side of the upper die (14). A pushing block (16) that can push the extension rod (15) is fixedly arranged on the die-casting roller body (2). The lower end height of the extension rod (15) is lower than the lower end height of the upper die (14).

3. An automatic die-casting device for an automotive aluminum alloy motor housing according to claim 1, characterized in that, A reset unit (17) is arranged at one end of the bracket (12). The reset unit (17) includes a rotating arm (171) hinged to the end of the bracket (12). The length direction of the rotating arm (171) is parallel to the radial direction of the die-casting roller body (2), and the rotating arm (171) rotates around the axis of the die-casting roller body (2). A heavy object (172) is vertically movably arranged on one side of the frame (1). A transmission unit (173) is arranged between the heavy object (172) and the rotating arm (171). The heavy object (172) drives the rotating arm (171) to rotate through the transmission unit (173).

4. An automatic die-casting device for an automotive aluminum alloy motor housing according to claim 3, characterized in that, The transmission unit (173) includes a toothed ring (1731) that rotates along the axis of the die-casting roller body (2). The toothed ring (1731) is fixedly connected to the end of the rotating arm (171). A rack (1732) is vertically and fixedly arranged at the lower part of the heavy object (172). The rack (1732) meshes with a gear.

5. An automatic die-casting device for an aluminum alloy motor housing of an automobile according to claim 3, characterized in that, A damping shell (174) is vertically and fixedly arranged on the frame (1). A ventilation hole (1741) is formed through the side wall of the damping shell (174). A damping rod (175) is vertically and fixedly arranged at the bottom of the heavy object (172). The damping rod (175) extends into the damping shell (174) and is slidably matched with the damping shell (174).

6. An automatic die-casting device for an automotive aluminum alloy motor housing according to claim 5, characterized in that, A switching valve (176) is arranged at the lower part of the damping shell (174).

7. An automatic die-casting device for an automotive aluminum alloy motor housing according to claim 1, characterized in that, A pressure sensor (111) for detecting the pressure of the bracket (12) is arranged above the second end of the arc-shaped groove (11).

8. An automatic die-casting device for an automotive aluminum alloy motor housing according to claim 7, characterized in that, A spring (112) is vertically arranged between the pressure sensor (111) and the second end of the arc-shaped groove (11), and the two ends of the spring (112) are fixedly connected to the second end of the arc-shaped groove (11) and the pressure sensor (111) respectively.

9. The automatic die-casting equipment for an automotive aluminum alloy motor housing according to claim 1, wherein A discharge plate (18) is inclinedly arranged below the frame (1), and a plurality of rollers (181) are rotatably arranged on the discharge plate (18) along the extending direction of the discharge plate (18).

10. The automatic die-casting equipment for an automotive aluminum alloy motor housing according to claim 1, characterized in that, A plurality of blowers (19) for blowing air to the lower die (21) after unloading are arranged on the frame (1).

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