Copper rotor die-casting die

Abstract

The utility model discloses a copper rotor die-casting die which comprises a lower die, a middle die, an upper die, a pressing plate and hydraulic devices, the middle die is fixed at the upper end of the lower die through bolts, the upper die is fixed at the upper end of the middle die through bolts, the hydraulic devices are respectively fixed at the left ends and the right ends of the middle die and the upper die, and the pressing plate is arranged at the upper end of the upper die. Fixed blocks are symmetrically fixed to the upper end of the upper die, pressed inclined grooves are symmetrically formed in the upper end of the upper die, movable dies are symmetrically arranged in the upper die, a shaft groove is formed in the upper end of the lower die, a plurality of grooves are formed in the outer wall of the shaft groove along the circumference of the shaft groove, the middle die is in a rectangular-ambulatory-plane shape, and semicircular grooves are symmetrically formed in the upper end of the middle die. When die casting is carried out on copper liquid and a silicon steel sheet between the movable dies, the extrusion block extrudes the pressed inclined groove and the extrusion inclined groove, so that the two movable dies are tightly attached to each other, a gap is prevented from occurring between the two movable dies, the copper liquid is prevented from flowing out of the gap, and a produced copper rotor is prevented from generating large burrs.

Description

Technical Field

[0001] The utility model relates to the technical field of copper rotor die-casting molds, and particularly relates to a copper rotor die-casting mold. Background Art

[0002] The structure of a conventional rotor die-casting mold consists of a moving template, a fixed template, a moving die insert, a middle die insert, a false shaft tooling, and a static die insert. The copper rings on both sides of the rotor are directly designed on the moving die insert and the static die insert. The circular concave grooves on the moving die insert and the static die insert are connected through the slot holes of the silicon steel sheets to form a casting cavity. During the die-casting process of the existing copper rotor mold, as the liquid in the mold is pressed down, the pressure at the lower end becomes greater, which will cause the molds to move away from each other, resulting in gaps between the molds, and then causing the copper liquid to flow out, resulting in unqualified copper rotors. Content of the Utility Model

[0003] In view of the above problems, the utility model provides a copper rotor die-casting mold, which solves the above problems.

[0004] To achieve the above object, the utility model provides the following technical solution: A copper rotor die-casting mold includes a lower die, a middle die, an upper die, a pressing plate, and a hydraulic device. The middle die is fixed to the upper end of the lower die by bolts, the upper die is fixed to the upper end of the middle die by bolts, hydraulic devices are respectively fixed to the left and right ends of the middle die and the upper die, the pressing plate is arranged on the upper end of the upper die, fixing blocks are symmetrically fixed to the upper end of the upper die, pressure-receiving inclined grooves are symmetrically opened at the upper end of the upper die, and moving dies are symmetrically arranged inside the upper die.

[0005] An axial groove is opened at the upper end of the lower die, and a plurality of grooves are opened along the circumference of the outer wall of the axial groove. The middle die is in a square shape with a hollow center, semi-circular grooves are symmetrically opened at the upper end of the middle die, protrusions are symmetrically arranged on the inner wall of the middle die, the upper die is in a square shape with a hollow center, protrusions are symmetrically arranged on the inner wall of the upper die, arc-shaped grooves are symmetrically opened at the lower end of the upper die, and extrusion inclined grooves are opened at the upper end of the moving die.

[0006] Preferably, the semi-circular grooves opened at the upper end of the middle die correspond to the arc-shaped grooves opened at the lower end of the upper die, and the semi-circular grooves and the arc-shaped grooves form a circle. The hydraulic devices are fixed to the middle die and the upper die by bolts, and the telescopic ends of the hydraulic devices pass through the arc-shaped grooves and the semi-circular grooves to be connected with the moving dies.

[0007] Preferably, the moving die is in a concave shape, the left end of the moving die is a plane, and the right end of the moving die is a semi-circular arc surface.

[0008] Preferably, limiting grooves are symmetrically opened at the upper end of the moving die, extrusion surfaces are symmetrically arranged at the right end of the moving die, the extrusion surfaces correspond to the protrusions, and the limiting grooves correspond to the fixing blocks.

[0009] Preferably, the upper end of the upper die is symmetrically provided with a clamping groove, and the fixing block is clamped in the clamping groove and fixed by bolts.

[0010] Preferably, a die-casting block is fixed to the lower end of the pressure plate, and an extrusion block is provided at the left and right ends of the die-casting block respectively, and the extrusion blocks correspond to the pressure chute and the extrusion chute.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. When the copper liquid and silicon steel sheet between the movable molds are die-casted, the extrusion block squeezes the pressure chute and the extrusion chute through the extrusion block, so that the two movable molds fit closely with each other, preventing a gap from appearing between the two movable molds, causing the copper liquid to flow out, and preventing large burrs from appearing on the produced copper rotor.

[0013] 2. The fixed block cooperates with the limit groove of the movable mold. When the movable mold is pressed down, the copper liquid between the two movable molds is prevented from passing through the gap at the lower end of the movable mold to push the movable mold up, which makes the device unable to complete the die-casting of the copper rotor. The extrusion surface cooperates with the protrusion. When the movable molds are brought close to each other through the hydraulic device, the extrusion surface of the movable mold encounters the protrusion, and the position of the movable mold is fine-tuned to make the joint between the two movable molds seamless, thereby ensuring the production quality of the copper rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is an overall schematic diagram of the die-casting mold of the present utility model;

[0016] Figure 3 This is an explosion diagram of the utility model;

[0017] Figure 4 This is an overall schematic diagram of the middle mold of the present utility model;

[0018] Figure 5 This is a schematic diagram of the upper mold of the utility model;

[0019] Figure 6 This is an overall schematic diagram of the movable mold of the present utility model;

[0020] Figure 7 It is an overall schematic diagram of the pressing plate of the present utility model.

[0021] Explanations in the figure: 1. Lower die; 2. Middle die; 3. Upper die; 4. Pressing plate; 5. Hydraulic device; 6. Moving die; 7. Fixed block; 8. Protrusion; 11. Axis groove; 12. Groove; 21. Semicircular groove; 31. Pressure-bearing inclined groove; 32. Arc groove; 33. Snap-fit ​​groove; 41. Die-casting block; 42. Extrusion block; 61. Extrusion inclined groove; 62. Limiting groove; 63. Extrusion surface. DETAILED DESCRIPTION

[0022] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 7A copper rotor die-casting mold includes a lower mold 1, a middle mold 2, an upper mold 3, a pressure plate 4 and a hydraulic device 5. The middle mold 2 is fixed to the upper end of the lower mold 1 by bolts. The lower mold 1 is a long plate in the shape of a convex character. Bolts are inserted on the edges of the front and rear ends of the lower mold 1. The lower mold 1 is fixed to the die-casting work table by bolts to achieve the overall fixation of the device. The middle mold 2 is fixedly connected to the lower mold 1 by bolts. The upper end of the bolt connecting the middle mold 2 and the lower mold 1 is lower than the upper end surface of the middle mold 2, ensuring that the connection between the middle mold 2 and the upper mold 3 is tightly fitted and seamless. The gap exists to ensure the die-casting yield of the copper rotor. The upper mold 3 is fixed to the upper end of the middle mold 2 by bolts. The upper ends of the bolts connecting the middle mold 2 and the upper mold 3 are lower than the upper end surface of the upper mold 3. When the pressure plate 4 is die-casting, the pressure plate 4 is completely fitted on the upper end of the upper mold 3 to prevent the occurrence of gaps that lead to unqualified die-cast copper rotors. The left and right ends of the middle mold 2 and the upper mold 3 are respectively fixed with hydraulic devices 5. The hydraulic devices 5 are existing devices and will not be described in detail here. The hydraulic devices 5 are used to push the two movable molds 6 to make them close to each other to form a mold for the copper rotor. The pressure plate 4 is arranged at the upper end of the upper mold 3, and the pressure plate 4 is fixed on the die casting machine. The die casting machine is an existing device and is not described in detail here. A die casting block 41 is fixed to the lower end of the pressure plate 4. The diameter of the die casting block 41 is the same as the diameter of the cylinder formed between the two movable molds 6. The extrusion block 42 is a boss shape, which is convenient for corresponding to the pressure inclined groove 31 and the extrusion inclined groove 61, and extruding them so that the two movable molds 6 are in close contact. The left and right ends of the die casting block 41 are respectively provided with extrusion blocks 42, and the extrusion blocks 42 are aligned with the pressure inclined groove 31 and the extrusion inclined groove 61. Corresponding to the groove 61, a fixed block 7 is symmetrically fixed to the upper end of the upper mold 3, a pressure-bearing inclined groove 31 is symmetrically opened on the upper end of the upper mold 3, and a movable mold 6 is symmetrically provided inside the upper mold 3. Through the extrusion block 42 and the pressure-bearing inclined groove 31 and the extrusion inclined groove 61, when the copper liquid and the silicon steel sheet between the movable mold 6 are die-cast, the extrusion block 42 extrude the pressure-bearing inclined groove 31 and the extrusion inclined groove 61, so that the two movable molds 6 fit closely with each other, preventing the two movable molds 6 from having a gap between them, causing the copper liquid to flow out, and preventing the copper rotor produced from having large burrs.

[0024] See also Figure 3 、 Figure 4 and Figure 5, a shaft groove 11 is provided at the upper end of the lower die 1, and a strip groove is provided inside the shaft groove 11 for positioning the shaft. At the same time, the rotor shaft is inserted and fixed in the shaft groove 11, and silicon steel sheets are inserted through the shaft. A plurality of grooves 12 are provided on the outer wall of the shaft groove 11 along its circumference. Copper liquid flows into the grooves 12 to form bumps, which is convenient for operations such as wiring and conduction. The middle die 2 is in a rectangular shape with a hole in the middle. Semi-circular grooves 21 are symmetrically provided at the upper end of the middle die 2. Protrusions 8 are symmetrically provided on the inner wall of the middle die 2. The upper die 3 is in a rectangular shape with a hole in the middle. Setting the middle die 2 and the upper die 3 as rectangular shapes and placing the moving die 6 therein realizes the limitation and fixation of the moving die 6, enabling the moving die 6 to only move therein. At the same time, when the pressing plate 4 presses down, the pressing block 42 presses on the upper die 3 and the moving die 6, making the gap between the upper die 3 and the moving die 6 gradually increase, and then making the two moving dies 6 approach each other, preventing a gap from appearing between the moving dies 6. At the same time, it prevents the moving die 6 from moving during the die-casting process due to thermal expansion and contraction, affecting the production of the copper rotor. Protrusions 8 are symmetrically provided on the inner wall of the upper die 3. Arc-shaped grooves 32 are symmetrically provided at the lower end of the upper die 3. The semi-circular grooves 21 provided at the upper end of the middle die 2 correspond to the arc-shaped grooves 32 provided at the lower end of the upper die 3. The semi-circular grooves 21 and the arc-shaped grooves 32 form a circle. The hydraulic device 5 is fixed to the middle die 2 and the upper die 3 by bolts. The telescopic end of the hydraulic device 5 passes through the arc-shaped groove 32 and the semi-circular groove 21 and is connected to the moving die 6, realizing that the telescopic end of the hydraulic device 5 presses against the two telescopic moving dies 6 to approach each other, making the two moving dies 6 closely fit together. Clamping grooves 33 are symmetrically provided at the upper end of the upper die 3. The fixing block 7 is clamped in the clamping grooves 33 and fixed by bolts. The telescopic fixing block 7 is clamped in the clamping grooves 33. When die-casting the copper liquid and the silicon steel sheets, it prevents the moving die 6 from rising due to the large pressure at the lower end. The rising fixing block 7 plays a role in hindering the rising of the moving die 6, preventing the moving die 6 from rising.

[0025] Please refer to Figure 4 , Figure 5 and Figure 6 It should be noted that there is an inaccuracy in the original text where it says "所述中模2为回字形,所述中模2的上端对称开设有半圆槽21,所述中模2的内壁对称设有凸起8,所述上模3为回字形,将所述中模2和上模3设置为回形,且在其中放置动模6,实现了对动模6的限位与固定,使动模6只能在其中进行移动", the description of "回字形" is not very clear. It is guessed that it may be "rectangular shape with a hole in the middle", and the translation is adjusted accordingly. If there are other specific requirements or corrections, please let me know., an extrusion chute 61 is provided at the upper end of the movable mold 6, the movable mold 6 is concave, the left end of the movable mold 6 is a plane, the right end of the movable mold 6 is a semicircular arc surface, the two semicircular arc surfaces of the movable mold 6 correspond to each other to form a full circle, thereby forming a cavity for die-casting of the copper rotor, the upper end of the movable mold 6 is symmetrically provided with a limiting groove 62, the right end of the movable mold 6 is symmetrically provided with an extrusion surface 63, the extrusion surface 63 corresponds to the protrusion 8, the limiting groove 62 corresponds to the fixed block 7, through The fixed block 7 cooperates with the limiting groove 62 of the movable mold 6. When the movable mold 6 is pressed down, the copper liquid between the two movable molds 6 is prevented from pushing the movable mold 6 up through the gap at the lower end of the movable mold 6, which causes the device to be unable to complete the die-casting of the copper rotor. The extrusion surface 63 cooperates with the protrusion 8. When the movable molds 6 are brought close to each other through the hydraulic device 5, the extrusion surface 63 of the movable mold 6 encounters the protrusion 8, and the position of the movable mold 6 is fine-tuned to make the joint between the two movable molds 6 seamless, thereby ensuring the production quality of the copper rotor.

[0026] When using this utility model:

[0027] First, fix the lower die 1 to the die-casting table with bolts, fix the middle die 2 to the lower die 1 with bolts, connect the hydraulic device 5 to the movable die 6, and place the telescopic end of the hydraulic device 5 in the semicircular groove 21 of the middle die 2, so that the arc groove 32 of the upper die 3 corresponds to the telescopic end of the hydraulic device 5 and fix the upper die 3 to the middle die 2 with bolts, fix the hydraulic device 5 to the middle die 2 and the upper die 3 with bolts, clamp the fixing block 7 in the clamping groove 33 of the upper die 3 and reinforce it with bolts, and fix the pressure plate 4 to the existing device die-casting machine;

[0028] Then, the copper rotor shaft is inserted into the shaft groove 11, and the silicon steel sheet is inserted into the shaft. After completion, the hydraulic device 5 works to push the movable mold 6, so that the two movable molds 6 are close to each other and in close contact, and the silicon steel sheet is clamped and positioned to prevent tilting.

[0029] Finally, molten copper is poured into the cylindrical cavity between the two movable dies 6. The die-casting machine drives the pressure plate 4 to press down, and the die-casting block 41 of the pressure plate 4 enters the cylindrical cavity between the movable dies 6. At the same time, the extrusion block 42 enters the pressure chute 31 and the extrusion chute 61, and extrudes the extrusion chute 61, so that the two movable dies 6 are in close contact here. At the same time, the die-casting block 41 is pressed down, and after die-casting, it is cooled and demolded, and the copper rotor is completed.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A copper rotor die-casting mold, characterized by: It includes a lower die (1), a middle die (2), an upper die (3), a pressing plate (4) and a hydraulic device (5). The middle die (2) is fixed to the upper end of the lower die (1) by bolts. The upper die (3) is fixed to the upper end of the middle die (2) by bolts. Hydraulic devices (5) are respectively fixed to the left and right ends of the middle die (2) and the upper die (3). The pressing plate (4) is arranged at the upper end of the upper die (3). Fixed blocks (7) are symmetrically fixed to the upper end of the upper die (3). Pressing inclined grooves (31) are symmetrically formed in the upper end of the upper die (3). Moving dies (6) are symmetrically arranged inside the upper die (3). An axial groove (11) is formed in the upper end of the lower die (1). A plurality of grooves (12) are formed in the outer wall of the axial groove (11) along its circumference. The middle die (2) is in a square shape with a hole in the middle. Semi-circular grooves (21) are symmetrically formed in the upper end of the middle die (2). Protrusions (8) are symmetrically arranged on the inner wall of the middle die (2). The upper die (3) is in a square shape with a hole in the middle. Protrusions (8) are symmetrically arranged on the inner wall of the upper die (3). Arc-shaped grooves (32) are symmetrically formed in the lower end of the upper die (3). Pressing inclined grooves (61) are formed in the upper end of the moving die (6).

2. The copper rotor die-casting mold according to claim 1, characterized in that: The semi-circular grooves (21) formed in the upper end of the middle die (2) correspond to the arc-shaped grooves (32) formed in the lower end of the upper die (3). The semi-circular grooves (21) and the arc-shaped grooves (32) form a circle. The hydraulic devices (5) are fixed to the middle die (2) and the upper die (3) by bolts. The telescopic ends of the hydraulic devices (5) pass through the arc-shaped grooves (32) and the semi-circular grooves (21) to be connected with the moving dies (6).

3. The copper rotor die-casting mold according to claim 1, characterized in that: The moving die (6) is in a concave shape. The left end of the moving die (6) is a flat surface. The right end of the moving die (6) is a semi-circular arc surface.

4. The copper rotor die-casting mold according to claim 1, characterized in that: Limiting grooves (62) are symmetrically formed in the upper end of the moving die (6). Pressing surfaces (63) are symmetrically arranged at the right end of the moving die (6). The pressing surfaces (63) correspond to the protrusions (8). The limiting grooves (62) correspond to the fixed blocks (7).

5. The copper rotor die-casting mold according to claim 1, characterized in that: Clamping grooves (33) are symmetrically formed in the upper end of the upper die (3). The fixed blocks (7) are clamped in the clamping grooves (33) and fixed by bolts.

6. The copper rotor die-casting mold according to claim 1, characterized in that: A die-casting block (41) is fixed to the lower end of the pressing plate (4). Pressing blocks (42) are respectively arranged at the left and right ends of the die-casting block (41). The pressing blocks (42) correspond to the pressing inclined grooves (31) and the pressing inclined grooves (61).

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