Four-in eight-out type motor casing hot extrusion production die

Abstract

The utility model discloses a four-in eight-out type motor casing hot extrusion production die which comprises an upper die and a lower die located at the bottom of the upper die, and the upper die comprises a hole formed in the top of the upper die, a central column arranged in the hole and a main bridge body connected with the four sides of the central column. The hole is divided into four first-stage flow dividing holes by the center column and the main bridge body, and an auxiliary bridge body connected with the center column and the inner wall of the upper die is arranged in each first-stage flow dividing hole. According to the utility model, the main bridge body and the auxiliary bridge body are arranged, so that an aluminum flow is divided into four parts firstly and then is divided into eight parts, and the impact force of the aluminum flow on the die core is shared by the central column and the main bridge body firstly and then is shared by the auxiliary bridge body again while the smooth flowing of the aluminum flow is ensured, so that the centralized direct impact of the aluminum flow on the die core is avoided, and the service life of the die core is prolonged. The stress of the mold core is effectively dispersed, the strength of the mold core is indirectly improved, and smooth extrusion production of the aluminum alloy motor shell is ensured.

Description

Technical Field

[0001] The utility model specifically relates to a four-inlet and eight-outlet hot extrusion production die for a motor shell. Background Art

[0002] The motor case is an important component of the motor. It is mainly used to protect the internal components of the motor and ensure its stable operation. Currently, there are many types of motor cases, including steel cases, stainless steel cases, plastic pressed cases, and aluminum alloy cases. Among them, the aluminum alloy case has a lower density of aluminum alloy. While ensuring the strength of the motor case, the motor case is lighter than other metal materials, which helps to reduce the overall weight of the motor and has good thermal conductivity. Therefore, it is widely used in new energy vehicles, industrial automation, power equipment and other fields.

[0003] At present, aluminum alloy motor casings are usually produced using hot extrusion dies. However, in actual use, traditional hot extrusion dies usually adopt a four-hole feed design to ensure that the extrusion force is reduced and the extrusion speed is accelerated. During the production process of the motor casing, the core of the upper mold is subjected to relatively concentrated force, and the strength is challenged by the impact of the aluminum flow. Crack bridges are often prone to occur, making the mold body unusable and requiring shutdown and mold repair.

[0004] Therefore, it is necessary to invent a four-input and eight-output motor housing hot extrusion production die to solve the above problems. Utility Model Content

[0005] (1) Purpose of the utility model

[0006] In order to solve the technical problems existing in the background technology, the utility model proposes a four-in-eight-out hot extrusion production mold for motor casings. By providing a main bridge body and an auxiliary bridge body, the aluminum flow is first divided into four and then divided into eight. While ensuring the smooth flow of the aluminum flow, the impact force of the aluminum flow on the mold core is first shared by the center column and the main bridge body, and then shared again by the auxiliary bridge body, avoiding the concentrated direct impact of the aluminum flow on the mold core, so that the force on the mold core is effectively dispersed, indirectly improving the strength of the mold core, and ensuring the smooth extrusion production of aluminum alloy motor casings.

[0007] (2) Technical solution

[0008] In order to achieve the above object, the utility model provides the following technical solutions: a four-input and eight-output motor housing hot extrusion production die, comprising an upper die and a lower die located at the bottom of the upper die;

[0009] The upper mold includes a hole opened at the top of the upper mold, a central column arranged inside the hole, and a main bridge body connected to the four sides of the central column. The hole is divided into four primary diversion holes by the central column and the main bridge body, and each of the primary diversion holes is provided with an auxiliary bridge body connected to the central column and the inner wall of the upper mold. The bottom of the central column is also connected to the mold core.

[0010] Among them, the four primary diversion holes are divided into two secondary diversion holes by the auxiliary bridge bodies inside them, and the four auxiliary bridge bodies are respectively arranged at the four corners of the central column, and the four corners of the central column are all milled downward with inclined sections.

[0011] Preferably, the vertical distance between the top surface of the auxiliary bridge body and the top opening of the hole is set to 50 mm, and the bottom of the inclined surface section extends to the top surface of the auxiliary bridge body.

[0012] Preferably, the top of one end of the four auxiliary bridge bodies away from the central column all protrude upward with an inclined body, the inclined body is connected to the inner wall of the upper mold, and the inclination angle of the inclined body is greater than the inclination angle of the inclined surface section.

[0013] Preferably, the lower mold comprises:

[0014] A welding chamber located on top of the lower die to contain the aluminum flow from the upper die;

[0015] The cavity located inside the lower die and connected to the welding chamber is used for hot extrusion molding of the motor housing;

[0016] And a discharge hole located at the bottom of the lower mold and connected to the cavity is used to discharge the motor housing after it is formed.

[0017] Preferably, the welding chamber is configured as a whole to be circular, and a plurality of protrusions are protruded from the inner wall toward the cavity.

[0018] Preferably, the mold cavity and the discharge hole are both circular as a whole, and the inner diameter of the discharge hole is larger than the inner diameter of the mold cavity.

[0019] Preferably, the upper mold and the lower mold are fastened to each other through fasteners to form a mold body.

[0020] Compared with the prior art, the beneficial effects of the above technical solution of the utility model are:

[0021] The utility model is provided with an auxiliary bridge body, so that the aluminum flow that is originally divided into four by the diversion hole is further divided into eight evenly, ensuring the smooth flow of the aluminum flow. At the same time, the impact force of the aluminum flow on the mold core is first shared by the central column and the main bridge body, and then shared again by the auxiliary bridge body, avoiding the aluminum flow from directly impacting the mold core, effectively dispersing the force on the mold core, indirectly improving the strength of the mold core, and avoiding the mold core from being subjected to excessive force due to the direct impact of the aluminum flow, thereby ensuring the smooth extrusion production of the aluminum alloy motor housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is an exploded view of the utility model;

[0025] Figure 3 It is a three-dimensional diagram of the utility model;

[0026] Figure 4 This is a cross-sectional view of the utility model;

[0027] Figure 5 This is a schematic diagram of the lower mold structure of the present utility model;

[0028] Figure 6 It is a cross-sectional view of the upper mold of the utility model.

[0029] Description of reference numerals:

[0030] 11 upper mold, 11 hole, 12 center column, 13 main bridge body, 14 first-level diversion hole, 15 auxiliary bridge body, 16 mold core, 17 second-level diversion hole, 18 inclined surface segment, 19 inclined body;

[0031] 2 lower die, 21 welding chamber, 22 cavity, 23 discharge hole. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] The utility model provides Figure 1-6 The hot extrusion production die for a four-inlet and eight-outlet motor housing shown in the figure comprises an upper die 1 and a lower die 2 located at the bottom of the upper die 1;

[0034] The upper mold 1 includes a hole 11 opened at the top of the upper mold 1, a central column 12 arranged inside the hole 11, and a main bridge body 13 connected to the four sides of the central column 12. The hole 11 is divided into four primary diversion holes 14 by the central column 12 and the main bridge body 13, and each of the primary diversion holes 14 is provided with an auxiliary bridge body 15 connected to the central column 12 and the inner wall of the upper mold 1. The bottom of the central column 12 is also connected to the mold core 16.

[0035] The four primary diversion holes 14 are divided into two secondary diversion holes 17 by the auxiliary bridge body 15 therein, and the four auxiliary bridge bodies 15 are respectively arranged at the four corners of the central column 12, and the four corners of the central column 12 are all milled downward with inclined sections 18.

[0036] In one embodiment, the vertical distance between the top surface of the auxiliary bridge body 15 and the top opening of the hole 11 is set to 50 mm, ensuring that the path length for the aluminum flow to flow in the first-level diversion hole 14 is sufficient, thereby ensuring the stability of the aluminum flow during flow. The bottom of the inclined section 18 extends to the top surface of the auxiliary bridge body 15, and the top of the four auxiliary bridge bodies 15 away from the center column 12 are all protruding upward with an inclined body 19, and the inclined body 19 is connected to the inner wall of the upper mold 1. The inclination angle of the inclined body 19 is greater than the inclination angle of the inclined section 18, so that the aluminum flow can flow smoothly and quickly into the secondary diversion hole 17.

[0037] In one embodiment, the lower mold 2 includes: a welding chamber 21 located at the top of the lower mold 2, for accommodating the aluminum flow from the upper mold 1, a cavity 22 located inside the lower mold 2 and connected to the welding chamber 21, for hot extrusion molding of the motor shell, and a discharge hole 23 located at the bottom of the lower mold 2 and connected to the cavity 22, for discharging the motor shell after molding, wherein the welding chamber 21 is configured as a whole in a circular shape, and the inner wall thereof is protruded with a plurality of protrusions toward the cavity 22, which do not affect the working of the cavity 22. Under the premise of this, the accumulation of aluminum flow inside the welding chamber 21 can be reduced, and excessive aluminum flow is avoided in the welding chamber 21, which causes the aluminum flow to be unable to flow smoothly into the cavity 22 during extrusion, thereby ensuring the smooth and stable aluminum flow in the cavity 22 and improving the molding quality of the motor housing. The cavity 22 and the discharge hole 23 are both circular as a whole, and the inner diameter of the discharge hole 23 is larger than the inner diameter of the cavity 22, so that when the motor housing is formed and discharged, its outer surface will not be affected, thereby ensuring the flatness of its outer surface.

[0038] In one embodiment, the upper mold 1 and the lower mold 2 are fastened to each other through fasteners to form a mold body. Specifically, the fasteners are configured as pins or bolts to facilitate the staff to assemble the mold body, and the mold body as a whole is disc-shaped, which is convenient for the staff to use the mold body.

[0039] The specific implementation method is as follows: When the present invention is in use, the aluminum flow is divided into four by the diversion hole before entering the hole 11, and then flows into the four primary diversion holes 14. As the aluminum flow continues to flow, the aluminum flow finally passes through the secondary diversion hole 17 and the welding chamber 21, and reaches the cavity 22. Under the cooperation of the mold core 16 and the cavity 22, it is extruded into an aluminum alloy motor housing and discharged through the discharge hole 23;

[0040] Specifically, after the aluminum flows through the top opening of the hole 11 and enters the upper mold 1, it will first flow downward inside the first-level diversion hole 14. At this time, with the obstruction of the central column 12 and the main bridge body 13, the aluminum flow is divided into four parts. At the same time, the impact force on the upper mold 1 is also divided into four parts, and most of the impact force is borne by the central column 12 and the main bridge body 13, which indirectly protects the mold core 16.

[0041] As the aluminum flow continues to flow downward, it will be blocked by the auxiliary bridge body 15. At this time, the aluminum flow inside each primary diversion hole 14 will be divided into two again, so that the aluminum flow flows into the secondary diversion hole 17 in a four-in and eight-out manner, and finally directly hits the outside of the mold core 16, fully supplying the outside of the mold core 16. At this time, the eight-out manner reduces the impact force of the aluminum flow on the mold core 16 again, and the auxiliary bridge body 15 can also share the impact force of the aluminum flow from the first diversion hole for the mold core 16, thereby providing secondary protection for the mold core 16, so that the strength of the mold core 16 is increased in disguise, and it is not easy to deflect or even crack under the impact of the aluminum flow;

[0042] At the same time, the arrangement of the inclined section 18 and the inclined body 19 allows the aluminum flow to smoothly transition from the primary diversion hole 14 to the secondary diversion hole 17, and concentrates the impact force of the aluminum flow on the auxiliary bridge body 15, thereby reducing the impact force on the central column 12. The mold core 16 located below the central column 12 is also reduced in force, which further increases the strength of the mold core 16, thereby ensuring the smooth extrusion production of the aluminum alloy motor housing.

[0043] This embodiment specifically solves the problem that in the prior art, when hot extrusion dies are used to produce aluminum alloy motor casings, in order to ensure that the extrusion force is reduced and the extrusion speed is accelerated, a four-hole feeding design is usually adopted. During the production process of the motor casing, the core 16 of the upper mold 1 is subjected to relatively concentrated force, and the strength is challenged by the impact of the aluminum flow, which often leads to crack bridges, making the mold body unusable and requiring shutdown for mold repair.

[0044] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A four-inlet and eight-outlet hot extrusion production die for motor housing, characterized by: It comprises an upper mold (1) and a lower mold (2) located at the bottom of the upper mold (1); The upper mold (1) comprises a hole (11) opened at the top of the upper mold (1), a central column (12) arranged inside the hole (11), and a main bridge body (13) connected to four sides of the central column (12); the hole (11) is divided into four primary diversion holes (14) by the central column (12) and the main bridge body (13); and each of the primary diversion holes (14) is provided with an auxiliary bridge body (15) connected to the central column (12) and the inner wall of the upper mold (1); and the bottom of the central column (12) is also connected to a mold core (16); The four primary diversion holes (14) are divided into two secondary diversion holes (17) by the auxiliary bridge bodies (15) therein, and the four auxiliary bridge bodies (15) are respectively arranged at the four corners of the central column (12), and the four corners of the central column (12) are all milled downward with inclined surface sections (18).

2. The four-inlet and eight-outlet hot extrusion production die for a motor housing according to claim 1, characterized in that: The vertical distance between the top surface of the auxiliary bridge body (15) and the top opening of the hole (11) is set to 50 mm, and the bottom of the inclined surface section (18) extends to the top surface of the auxiliary bridge body (15).

3. The four-inlet and eight-outlet hot extrusion production die for a motor housing according to claim 1, characterized in that: The top of one end of the four auxiliary bridge bodies (15) away from the central column (12) all protrude upward with an inclined body (19), and the inclined body (19) is connected to the inner wall of the upper mold (1), and the inclination angle of the inclined body (19) is greater than the inclination angle of the inclined surface section (18).

4. The four-inlet and eight-outlet hot extrusion production die for a motor housing according to claim 1, characterized in that: The lower mold (2) comprises: a welding chamber (21) located on top of the lower die (2) for receiving the aluminum flow from the upper die (1); A cavity (22) located inside the lower mold (2) and connected to the welding chamber (21) is used for hot extrusion molding of the motor housing; and a discharge hole (23) located at the bottom of the lower mold (2) and connected to the mold cavity (22), for discharging the motor housing after molding.

5. The four-inlet and eight-outlet hot extrusion production die for a motor housing according to claim 4, characterized in that: The welding chamber (21) is configured as a circle as a whole, and has a plurality of protrusions protruding from the inner wall toward the cavity (22).

6. The four-inlet and eight-outlet hot extrusion production die for a motor housing according to claim 4, characterized in that: The mold cavity (22) and the discharge hole (23) are both circular in shape as a whole, and the inner diameter of the discharge hole (23) is larger than the inner diameter of the mold cavity (22).

7. The four-inlet and eight-outlet hot extrusion production die for a motor housing according to claim 1, characterized in that: The upper mold (1) and the lower mold (2) are fastened together to form a mold body via fasteners.

Images