Die-casting die for asynchronous rotor iron core height automatic compensation process

Abstract

The utility model relates to the field of motor rotor die-casting, in particular to a die-casting die for an asynchronous rotor iron core height automatic compensation process, an extrusion mechanism comprises an extrusion base plate, a guide base plate and a limiting base plate, a plurality of extrusion needles are arranged on the extrusion base plate, extrusion holes matched with the extrusion needles are arranged on the guide base plate, and the limiting base plate is arranged on the guide base plate. A containing groove is formed in the limiting base plate, a movable die core is arranged in the containing groove, a plurality of die-casting holes are formed in the movable die core in a cc mode, the front end of each extrusion needle penetrates through the corresponding die-casting hole to extrude the die, and a correcting device is arranged at the end of the movable die core. The die-casting mechanism comprises a fixed base plate and a fixed die core, the fixed die core and the movable die core are attached to form a die-casting cavity, and the die-casting cavity is used for storing liquid aluminum liquid until the liquid aluminum liquid is cooled and shaped. And the product quality of the asynchronous motor rotor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor rotor die casting field especially an asynchronous rotor core height automatic compensation process's die casting mould. BACKGROUND

[0002] In the manufacturing process of the asynchronous motor rotor core, especially the aluminum end ring of the motor cast aluminum rotor in the production process, the main material is formed by pouring aluminum liquid, but in the pouring process, the pouring speed and the cooling speed of the aluminum liquid will have a certain influence on the final product, especially if the required process preparation is not installed, the final product will appear hot shrinkage hole and porosity, which will cause product defects.

[0003] If there is a bubble in the motor, the part is a pure air cavity, which makes the resistance of the part area too large, the power factor decreases, the slip rate is large, the conductivity is low, the power consumption is high, and the heat problem; and the large shrinkage hole will also make the rotor lose dynamic balance in the rotating process, when applied to the motor of the new energy automobile, the motor rotor speed must reach more than 20000rpm, which will cause the shaft of the motor to be unbalanced and vibrate, and more seriously, it will cause burning or rotor disintegration.

[0004] Therefore, it is necessary to design a new asynchronous rotor core height automatic compensation process die casting mold. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at solving the technical problem of the existing technology that the die casting asynchronous motor rotor core appears bubbles in the aluminum material at both ends of the asynchronous motor rotor core, and provides an asynchronous rotor core height automatic compensation process die casting mold, which improves the product quality of the asynchronous motor rotor by improving the structure of the die casting mold and reducing the bubbles generated during the aluminum liquid die casting and cooling process at both ends of the asynchronous motor rotor.

[0006] The utility model provides an asynchronous rotor core height automatic compensation process die casting mold, which comprises:

[0007] The extrusion mechanism comprises an extrusion base plate, a guide base plate and a limiting base plate, a plurality of extrusion needles are arranged on the extrusion base plate, an extrusion hole matched with the extrusion needles is arranged on the guide base plate, a containing groove is formed in the limiting base plate, a movable mold core is arranged in the containing groove, a plurality of die casting holes are arranged on the movable mold core, the front ends of the extrusion needles pass through the die casting holes to extrude the mold, a correcting device is arranged at the end of the movable mold core, the correcting device is a disc spring, the disc spring has a certain elasticity and deforms after being subjected to pressure, at this time, energy is stored, and a counterforce acts on the movable mold core, the pressure of the movable mold core in the circumferential direction is adjusted, and the movable mold core is uniformly connected at all angles.

[0008] The die-casting mechanism comprises a fixed base plate and a fixed mold core, the fixed mold core and the movable mold core are attached to form a die-casting cavity, and the die-casting cavity is used for storing liquid aluminum until cooling and setting. The die-casting mechanism is fixed on the equipment, the movable mold core on the extrusion mechanism is first attached to the fixed mold core on the die-casting mechanism, then the aluminum liquid is poured, the aluminum liquid is extruded by the extrusion needle to eliminate the bubbles therein, and the correction device is abutted against the movable mold core to compensate for the angles of the movable mold core, so that the movable mold core and the fixed mold core are aligned, and the overall success rate is improved.

[0009] As a further improvement of the utility model, the movable mold core comprises an inner mold end and an outer mold end, the inner mold end is provided with an outer mold groove, the fixed mold core is provided with an inner mold groove, and the outer mold groove and the inner mold groove form the die-casting cavity.

[0010] As a further improvement of the utility model, the movable mold core comprises an inner mold end and an outer mold end, the inner mold end is provided with an outer mold groove, the fixed mold core is provided with an inner mold groove, and the outer mold groove and the inner mold groove form the die-casting cavity.

[0011] As a further improvement of the utility model, the outer mold end is provided with a correction groove, the correction device is located in the correction groove, and the correction device is in a compressed state.

[0012] As a further improvement of the utility model, one end of the disc spring is abutted against the side wall of the correction groove, and the other end of the disc spring is abutted against the side wall of the guide base plate.

[0013] As a further improvement of the utility model, the guide base plate is provided with a plurality of guide columns, and the extrusion base plate is slidably connected with the guide columns.

[0014] As a further improvement of the utility model, the extrusion needle comprises an extrusion section and a connecting section, and the diameter of the extrusion section is smaller than that of the connecting section.

[0015] As a further improvement of the utility model, the connecting section has the same cross-sectional diameter as the extrusion hole, and the extrusion section has the same cross-sectional diameter as the die-casting hole.

[0016] As a further improvement of the utility model, the die-casting holes are uniformly arranged in the circumferential direction of the movable mold core.

[0017] The utility model discloses an advantageous effect lies in: 1, through setting up the correcting device, can carry out pressure compensation on the circumference of mobile mould core, the height of automatic compensation mobile mould core, avoid mobile mould core and deviate, and the pressure is not tight and leads to the aluminum leakage, also prevent mobile mould core and deviate, and the pressure is too tight and leads to the blowhole and produces, 2, avoid the aluminum leakage of mobile mould core height deviation, or the blowhole of cast aluminum product and scrap, improve the success rate of die casting, and the overall practicality is high, and the cost of recasting is saved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall structural drawing of the utility model.

[0019] Figure 2 It is the bottom view of the utility model.

[0020] Figure 3 It is the cross section schematic view of the utility model.

[0021] Figure 4 It is the internal structure schematic view of the utility model.

[0022] Figure 5 It is the assembly structure schematic view of mobile mould core and fixed mould core of the utility model.

[0023] Figure 6 It is the cross section schematic view of mobile mould core and fixed mould core working state of the utility model.

[0024] Figure 7 It is Figure 6 The middle part structure enlarged view.

[0025] Fig. 1, extrusion mechanism, 100, die casting cavity, 11, extrusion base plate, 110, extrusion hole, 111, extrusion needle, 112, extrusion section, 113, connecting section, 12, guide base plate, 121, guide column, 13, limit base plate, 130, containing groove, 2, die casting mechanism, 21, fixed base plate, 211, blocking ring clamping groove, 3, mobile mould core, 30, die casting hole, 31, in-mould end, 310, model groove, 311, protruding blocking ring, 32, out-mould end, 320, correction groove, 4, fixed mould core, 40, in-model groove, 5, correcting device. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the overall concept of the utility model, the following in conjunction with the drawings in the description is illustrated by way of example.

[0027] It should be noted that in the following description, a lot of specific details are set forth in order to provide a thorough understanding of the utility model, however, the utility model can also be implemented in other ways different from the description herein, therefore, the protection scope of the utility model is not limited by the following disclosed specific embodiments.

[0028] As shown in Figures 1 to 7 The utility model provides a die casting mould of asynchronous rotor iron core height automatic compensation process, through improving the structure of die casting mould, specifically adds the rectifying device and the limiting device to eliminate the bubble produced in the process of aluminium liquid die casting and cooling, prevents the leakage of aluminium liquid, improves the quality of aluminium product.

[0029] As shown in Figures 1 to 3 A die casting mould of asynchronous rotor iron core height automatic compensation process, including extrusion mechanism 1 and die casting mechanism 2, the mobile mould core 3 is arranged in extrusion mechanism 1, and the fixed mould core 4 is arranged in die casting mechanism 2,

[0030] Die casting mechanism 2 is fixed on other equipment, the mobile mould core 3 on extrusion mechanism 1 first and the fixed mould core 4 on die casting mechanism 2 are attached, then pour aluminium liquid, extrude aluminium liquid through multiple extrusion needles 111, eliminate the bubble therein, therefore, in the process of extrusion and cooling, the mobile mould core and the fixed mould core abut together and need to be closely attached together, and the situation of misalignment up and down cannot occur.

[0031] The utility model relates to extrusion mechanism 1, the extrusion mechanism 1 of the above-mentioned including extrusion base plate 11, guide base plate 12 and limiting base plate 13, the extrusion base plate 11 of the above-mentioned is equipped with multiple extrusion needles 111, the guide base plate 12 of the above-mentioned is provided with the extrusion hole 110 that cooperates with extrusion needle 111, the limiting base plate 13 of the above-mentioned is opened in the accommodation groove 130, the mobile mould core 3 is arranged in the accommodation groove 130, the mobile mould core 3 of the above-mentioned is provided with multiple die casting holes 30, and the front end of each extrusion needle 111 passes through die casting hole 30 to extrude mould,

[0032] The utility model relates to die casting mechanism 2, the die casting mechanism 2 of the above-mentioned including fixed base plate 21 and fixed mould core 4, the fixed mould core 4 of the above-mentioned and mobile mould core 3 are attached and form die casting cavity 100, the die casting cavity 100 of the above-mentioned is used to store liquid aluminium, until cooling and setting.

[0033] As shown in Figures 2-4 The guide base plate 12 is provided with 4-6 guide columns 121, the extrusion base plate 11 is slid along each guide column 121, the extrusion needle 111 includes extrusion section 112 and connecting section 113, the diameter of extrusion section 112 is less than the diameter of connecting section 113.

[0034] The cross section diameter of connecting section 113 is same with the cross section diameter of extrusion hole 110, the cross section diameter of extrusion section 112 is same with the cross section diameter of die casting hole 30, and each die casting hole 30 is evenly arranged on the circumference of mobile mould core 3.

[0035] The extrusion base plate 11 is under the external force, the extrusion needle 111 is moved, the extrusion section 112 in the extrusion needle 111 first passes through the extrusion hole 110, and then moves the extrusion aluminum liquid model in the die casting hole 30, and the connecting section 113 slides in the extrusion hole 110 and plays the role of supporting and limiting.

[0036] In the process of die casting, if the outer model groove 310 of the movable mold core 3 and the inner model groove 40 arranged on the fixed mold core 4 are not aligned, the overall alignment height of the movable mold core 3 is too low, aluminum liquid leakage occurs, a complete product is not formed in the limited aluminum liquid, and the product is partially empty and overall scrapped, if the overall alignment height of the movable mold core 3 is too high, the upper part is too tight, the exhaust is not smooth, and the product has air bubbles inside, so the product is unqualified and needs to be recast.

[0037] In the existing device, only the compression is used, and there is no specific adjusting and correcting device to avoid the improper position of the movable mold core 3.

[0038] The movable mold core 3 includes an inner mold end 31 and an outer mold end 32, the outer mold end 31 is provided with an outer model groove 310, the fixed mold core 4 is provided with an inner model groove 40, and the outer model groove 310 and the inner model groove 40 form a die casting cavity 100.

[0039] In order to further improve the alignment accuracy of the movable mold core 3 and the fixed mold core 4, the movable mold core 3 is fixed by using the blocking ring clamping groove 211 and the protruding blocking ring 311 clamping, the outer mold end 32 is provided with the protruding blocking ring 311 in the circumferential direction of the model groove 310, the fixed base plate 21 is provided with the blocking ring clamping groove 211, and the protruding blocking ring 311 is clamped in the blocking ring clamping groove 211.

[0040] As shown in Figure 5 The outer mold end 32 is provided with a correction groove 320, the correcting device 5 is in the correction groove 320, and the correcting device 5 is in a compressed state.

[0041] As a better choice, the correcting device 5 of the utility model is a disc spring, the disc spring is a disc-shaped elastic device, can be used individually, bears static or dynamic load in the axial direction at the upper inner edge and the lower outer edge, is deformed after being compressed, is flattened until energy is stored as a live load. When necessary, it is automatically converted into additional compression load required for sealing to reduce the continuous requirement for tightening of the movable mold core 3 in use.

[0042] Specific installation position as Figure 5 and Figure 6 As shown in the drawings, one end of the disc spring abuts against the sidewall of the correction groove 320, and the other end of the disc spring abuts against the sidewall of the guide base plate 12.

[0043] In the utility model, through setting correction device 5, can carry out pressure compensation in the circumference of mobile mold core 3, automatically compensate the height of mobile mold core 3, avoid the deviation of mobile mold core 3, and the tightness of pressure casting is not caused by the leakage of aluminum, also prevent mobile mold core 3 from being up, and the gas hole is caused by the exhaust of too tight pressure limiting, improve the success rate of pressure casting, and the overall practicality is high, saves the cost of recasting.

[0044] The above-described embodiments only express several implementation manners of the utility model, and the description is relatively specific and detailed, but it cannot be understood as the limitation of the utility model patent scope. It should be pointed out that for ordinary skilled person in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model.

Claims

1. A die-casting mold for an asynchronous rotor core height automatic compensation process, characterized by, The utility model relates to a die-casting device, which comprises a pressing mechanism (1) and a die-casting mechanism (2). The pressing mechanism (1) comprises a pressing base plate (11), a guide base plate (12) and a limiting base plate (13). The pressing base plate (11) is provided with a plurality of pressing needles (111).

2. The die casting mold of the asynchronous rotor core height automatic compensation process according to claim 1, characterized in that, The guide base plate (12) is provided with a plurality of pressing holes (110) matched with the pressing needles (111).

3. The die casting mold of the asynchronous rotor core height automatic compensation process according to claim 2, characterized in that, The limiting base plate (13) is provided with a receiving groove (130) in which a movable mold core (3) is arranged.

4. The die casting mold of the asynchronous rotor core height automatic compensation process according to claim 3, characterized in that, The movable mold core (3) is provided with a plurality of die-casting holes (30).

5. The die casting mold of the asynchronous rotor core height automatic compensation process according to claim 4, characterized in that, The front end of each pressing needle (111) passes through the die-casting hole (30) to press the mold.

6. The die casting mold of the asynchronous rotor core height automatic compensation process of claim 1, wherein, The end of the movable mold core (3) is provided with a correcting device (5) which is a disc spring.

7. The die casting mold of the asynchronous rotor core height automatic compensation process according to claim 6, characterized in that, The die-casting mechanism (2) comprises a fixed base plate (21) and a fixed mold core (4).

8. The die casting mold of the asynchronous rotor core height automatic compensation process according to claim 7, characterized in that, The fixed mold core (4) and the movable mold core (3) are attached to form a die-casting cavity (100) for storing liquid aluminum until it is cooled and shaped.

9. The die casting mold of the asynchronous rotor core height automatic compensation process according to claim 8, characterized in that, The movable mold core (3) comprises an inner mold end (31) and an outer mold end (32). The inner mold end (31) is provided with an outer mold groove (310), and the fixed mold core (4) is provided with an inner mold groove (40). The outer mold groove (310) and the inner mold groove (40) form the die-casting cavity (100). The outer mold groove (310) is provided with a protruding blocking ring (311) in the circumferential direction. The fixed base plate (21) is provided with a blocking ring clamping groove (211). The outer mold end (32) is provided with a correction groove (320) in which the correcting device (5) is located. One end of the disc spring abuts against the sidewall of the correction groove (320), and the other end of the disc spring abuts against the sidewall of the guide base plate (12). The guide base plate (12) is provided with a plurality of guide columns (121). The pressing needle (111) comprises a pressing section (112) and a connecting section (113). The diameter of the pressing section (112) is smaller than that of the connecting section (113). The cross-sectional diameter of the connecting section (113) is the same as that of the pressing hole (110), and the cross-sectional diameter of the pressing section (112) is the same as that of the die-casting hole (30). Each die-casting hole (30) is uniformly arranged in the circumferential direction of the movable mold core (3).

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