KR102555462B1 - High-pressure die-casting device for manufacturing VCU housing - Google Patents

Abstract

A pair of cover movable mold and cover fixed mold for manufacturing a cover of a vehicle controller housing, and a pair of body movable mold and body fixed mold for manufacturing a body of the vehicle controller housing, wherein the cover movable mold or body movable mold includes: , It includes a press part into which molten metal flows, a forming part into which the introduced molten metal is molded into a product, and an overflow part through which excess molten metal flows from the forming part, and the region where the press part is located has a plurality of first cooling grooves. is formed, a cooling module is inserted into the first cooling groove, and a plurality of first heating grooves are formed in the area where the molded part is located, and the heating module is inserted into the first heating groove. Provides a high-pressure die-casting device for

Description

High-pressure die-casting device for manufacturing VCU housing }

The present invention relates to a high-pressure die-casting apparatus, and relates to a high-pressure die-casting apparatus for manufacturing a vehicle controller housing capable of mass production with improved productivity and reducing casting defects.

In an electric vehicle, the Vehicle Control Unit (VCU) prioritizes torque control along with the motor controller, and in addition, cooperates with lower-order controllers connected via CAN, such as starting sequence control, fault diagnosis control, and energy management optimal control. It can be said that it is a control tower component that performs.

A vehicle controller for an electric vehicle may include a vehicle controller housing made of aluminum in order to reduce the weight of the vehicle. The aluminum vehicle controller housing is generally manufactured through an impact extrusion press process. The impact extrusion press process applies force to non-ferrous metals (lead, tin, aluminum, and alloys) in a cold state by a mechanical press such as a crank press or a toggle press to increase the deformation rate. It is a method of molding a product with a hollow cross section or general cross section by extruding it through the gap of the bottom, and it is a processing technology for products with very thin thickness. However, in terms of productivity and resulting price competitiveness, it can be seen that it is necessary to develop a technology that allows the vehicle controller housing to be applied to the die casting method.

Among die casting methods, High Pressure Diecasting (HPDC) is a precision casting method that can produce products by injecting molten metal under high pressure into a mold made of high-strength steel machined to match the required casting shape. Its competitiveness is the highest among casting methods, and its share in the casting industry is gradually increasing.

However, the housing of the vehicle controller must be very thin in order to dissipate the heat generated from the electric board of the vehicle controller, and has a net-shaped product shape (thickness, ribs, radiating fins, etc.), so high-pressure die-casting is applied. In the case of production, internal defects such as shrinkage or pores in the product may occur due to the vortex of the molten metal, which may cause defects such as molding defects and deterioration of physical properties. In addition, due to repetitive heating and cooling, extreme thermal shock is applied to the mold, resulting in heat cracks, which may reduce the lifespan of the mold. Therefore, it is necessary to develop a high-pressure die-casting technology for manufacturing a vehicle controller housing to solve the above problems.

Korean Patent Publication No. 10-2019-0109839 (published on September 27, 2019) Korean Registered Patent No. 10-1529548 (registration date: June 11, 2015) Korean Patent Publication No. 10-2019-0126699 (published on November 12, 2019) Korean Patent Publication No. 10-2009-0000389 (published on January 7, 2009)

The technical problem to be achieved by the present invention is to provide a high-pressure die-casting device for manufacturing a vehicle controller housing capable of preventing heat cracking of a mold and increasing the lifespan of a mold.

In addition, another technical problem to be achieved by the present invention is to provide a high-pressure die-casting device for manufacturing a vehicle controller housing that can prevent internal defects of the product and thereby minimize defects such as molding defects and deterioration of physical properties. has a purpose in

The object of the present invention is not limited to the above-mentioned object, and other objects not mentioned will be clearly understood by those skilled in the art from the description below.

In order to solve the above problem, the present invention includes a pair of cover movable mold and cover fixed mold for manufacturing a cover of a vehicle controller housing, and a pair of body movable mold and body fixed mold for manufacturing a body of the vehicle controller housing, , The cover movable mold or the body movable mold includes a press part into which molten metal flows, a mold part into which the introduced molten metal is molded into a product, and an overflow part through which excess molten metal flows from the mold part, and the press part A plurality of first cooling grooves are formed in the region where is located, and a cooling module is inserted into the first cooling grooves, and a plurality of first heating grooves are formed in the region where the molded part is located, and the heating module is inserted into the first heating grooves. It is possible to provide a high-pressure die-casting device for manufacturing a vehicle controller housing, characterized in that.

The cover fixing mold or the body fixing mold may further include a second cooling groove or a second heating groove in an area facing the cover movable mold or the body movable mold, respectively.

The first cooling groove or the first heating groove may be formed on a vertical line with respect to a surface on which the molding part is located.

The press part of the movable cover mold or the movable body mold includes a molten metal inflow region into which molten metal flows from the outside of the mold, and a plurality of molten metal diverging regions formed at a boundary between the molten metal inflow region and the forming part, and the first cooling groove. may be located on a vertical line with respect to each of the molten metal inflow region and the molten metal divergence region.

The first heating groove may be located in a region from a center of the molding part to a boundary between the molding part and the overflow part.

In the cover movable mold or body movable mold, a pair of the pusher, molding cavity, and overflow part may be provided symmetrically from side to side, and a temperature sensor may be inserted and positioned between the symmetrical overflow parts. .

In the high-pressure die-casting apparatus for manufacturing a vehicle controller housing according to an embodiment of the present invention, heat cracking of a mold can be prevented by providing a cooling module to the pressurizing unit to minimize the temperature shock of the pressurizing unit, and the lifespan of the mold can be increased. There are advantages.

In addition, by providing a cooling module in the pressurizing part and a heating module in the forming part, it is possible to reduce the temperature deviation of the movable mold or the fixed mold and prevent the occurrence of defects in the product, thereby minimizing the occurrence of defects such as poor molding and deterioration of physical properties. There are effects that can be done.

1 is a perspective view showing a vehicle controller housing cover manufactured using a high-pressure die-casting apparatus according to an embodiment of the present invention;
2 is a perspective view showing a vehicle controller housing body manufactured using a high-pressure die-casting device according to an embodiment of the present invention;
3 is a front view showing a cover movable mold of a high-pressure die-casting apparatus for manufacturing a vehicle controller housing according to an embodiment of the present invention;
4 is a front view showing a cover fixing mold of a high-pressure die-casting apparatus for manufacturing a vehicle controller housing according to an embodiment of the present invention;
5 is a cross-sectional view taken along II' showing a cover movable mold and a cover fixing mold of a high-pressure die-casting apparatus for manufacturing a vehicle controller housing according to an embodiment of the present invention after coupling;
6 is a front view showing a body movable mold of a high-pressure die-casting device for manufacturing a vehicle controller housing according to an embodiment of the present invention;
7 is a front view showing a body fixing mold of a high-pressure die-casting device for manufacturing a vehicle controller housing according to an embodiment of the present invention;
8 is a cross-sectional view taken along line II-II' showing a body movable mold and a body fixed mold of a high-pressure die-casting apparatus for manufacturing a vehicle controller housing according to an embodiment of the present invention after being coupled;
9 is a perspective view showing a cooling module of a high-pressure die-casting apparatus for manufacturing a vehicle controller housing according to an embodiment of the present invention;
10 is a perspective view showing a heating module of a high-pressure die-casting apparatus for manufacturing a vehicle controller housing according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments introduced below are provided as examples to sufficiently convey the spirit of the present invention to those skilled in the art. Accordingly, the present invention may be embodied in other forms without being limited to the embodiments described below. Also, in the drawings, the lengths and thicknesses of layers and regions may be exaggerated for convenience. Like reference numbers indicate like elements throughout the specification.

1 is a perspective view showing a vehicle controller housing cover manufactured using a high-pressure die-casting device according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a vehicle controller housing body manufactured using a high-pressure die-casting device according to an embodiment of the present invention. A perspective view, Figure 3 is a front view showing a cover movable mold of a high-pressure die-casting apparatus for manufacturing a vehicle controller housing according to an embodiment of the present invention, Figure 4 is a high-pressure die-casting apparatus for manufacturing a vehicle controller housing according to an embodiment of the present invention Figure 5 is a front view showing a cover fixing mold, Figure 5 is a cross-sectional view showing a cover movable mold and cover fixing mold of a high-pressure die-casting apparatus for manufacturing a vehicle controller housing according to an embodiment of the present invention after coupling, Figure 6 is an embodiment of the present invention 7 is a front view showing a body fixing mold of a high-pressure die-casting device for manufacturing a vehicle controller housing according to an embodiment of the present invention, FIG. 8 9 is a cross-sectional view showing a high-pressure die-casting device for manufacturing a vehicle controller housing according to an embodiment of the present invention after combining a body movable mold and a body fixed mold, and FIG. 9 is a high-pressure die-casting for manufacturing a vehicle controller housing according to an embodiment of the present invention. A perspective view showing a cooling module of the device, FIG. 10 is a perspective view showing a heating module of a high-pressure die-casting device for manufacturing a vehicle controller housing according to an embodiment of the present invention.

1 to 10, a high-pressure die-casting apparatus according to an embodiment of the present invention includes a pair of a cover movable mold 110 and a cover fixing mold 120 for manufacturing a cover 10 of a vehicle controller housing, and the vehicle It includes a pair of body movable mold 210 and body fixing mold 220 for manufacturing the body 20 of the controller housing, and the cover movable mold 110 or body movable mold 210 has pressure through which molten metal flows. It includes a bath portion (A), a forming portion (C) in which the introduced molten metal is molded into a product, and an overflow portion (B) through which excess molten metal flows from the forming portion (C), and the pressing portion (A) A plurality of first cooling grooves 117 and 217 are formed in the region where is located, the cooling module 300 is inserted into the first cooling grooves 117 and 217, and the region where the molding part C is located has a plurality of first cooling grooves 117 and 217. The first heating grooves 115 and 215 may be formed and the heating module 400 may be inserted into the first heating grooves 115 and 215 .

The housing of the vehicle controller provided by the combination of the cover 10 of the housing and the body 20 of the housing must be formed of a very thin sheet in order to dissipate heat generated from the electric board of the vehicle controller. It may be formed by including an aluminum alloy for die casting that is easy and has high thermal conductivity, and may be formed of, for example, an Al-Cu-Si-based ALDC 10 or ALDC 12 alloy. Therefore, in order to minimize the deformation of the thin plate area after casting the aluminum housing, the cover movable mold 110, the cover fixed mold 120, the body movable mold 210 or the body fixed mold 220 control the temperature gradient while preventing thermal shock damage. This should be easy. High-pressure die-casting apparatus for manufacturing a vehicle controller housing according to an embodiment of the present invention By providing a plurality of cooling modules 300 in the pressing unit (A), It is possible to prevent heat cracks and mold erosion of the mold by minimizing the temperature shock of the press part (A), and the press part (A) is provided with a cooling module (300) and the molding part (C) is provided with a heating module (400). By providing the movable mold (110, 210) or the stationary mold (120, 220) temperature deviation can be reduced and the temperature gradient can be easily adjusted, thereby preventing the occurrence of internal defects in the cast product.

In detail, a pair of the cover movable mold 110 and the cover fixing mold 120 are combined to prepare a cover mold to manufacture the cover 10 of the vehicle controller housing, and the body movable mold 210 and the body fixing mold ( 220) The body 20 of the vehicle controller housing may be manufactured by combining the pair to prepare a body mold. The cover movable mold 110 or the body movable mold 210 includes a press part (A) into which molten metal flows in, a forming part (C) into which the molten metal flows into a product, and an extra portion from the forming part (C). It may include an overflow portion (B) through which molten metal flows, and the cover fixing mold 120 or the body fixing mold 220 corresponds to the cover movable mold 110 or the body movable mold 210, respectively. A molding part C may be provided in the region. For example, in the cover fixing mold 120 or the body fixing mold 220, only the forming part (C) is formed, and the pressing part (A) and the overflow part of the cover movable mold 110 or the body movable mold 210 are formed. It may be that a flow path through which molten metal flows in or out as in (B) is not formed.

In the cover movable mold 110 or the body movable mold 210, a plurality of first cooling grooves 117 and 217 are formed in the region where the pressurizing portion A is located, and the first cooling grooves 117 and 217 The cooling modules 301 and 303 are inserted and a plurality of first heating grooves 115 and 215 are formed in the region where the molding part C is located, and the heating module 401 is attached to the first heating grooves 115 and 215. , 403) may be inserted.

Furthermore, the cover fixing mold 120 or the body fixing mold 220 has second cooling grooves 127 and 227 or second heating in an area opposite to the cover movable mold 110 or the body movable mold 210, respectively. Grooves 125 and 225 may be further provided. That is, in the cover fixing mold 120 or the body fixing mold 220, a plurality of second cooling grooves 127 and 227 are formed in an area corresponding to the pressing portion A, so that the second cooling grooves 127 and 227 ), the cooling modules 302 and 304 are inserted, and a plurality of second heating grooves 125 and 225 are formed in the area where the molding part C is located, and the heating module ( 402, 404) may be inserted.

For example, as shown in FIG. 9, the cooling module 300 includes a cooling member 320 including a fluid inlet 340 through which cooling fluid is drawn in and out from the outside, and a flow path through which the cooling fluid moves, and A cooling module fixing member 330 coupled to the cooling member 320 may be included so that the cooling member 320 is fitted and fixed to the first cooling grooves 117 and 217 or the second cooling grooves 127 and 227 . In addition, as another example, as shown in FIG. 10, the heating module 400 includes a heating member 420 generating heat by being connected to the outside and a power source, and the heating member 420 in a first heating groove 115, 215) or a heating module fixing member 430 coupled to the heating member 420 so as to be fitted and fixed to the second heating grooves 125 and 225.

In this case, the first cooling grooves 117 and 217 and the second cooling grooves 127 and 227 may be positioned symmetrically with each other, and the first heating grooves 115 and 215 and the second heating grooves 125 and 225 may be positioned symmetrically with each other. However, since each of the cover movable mold 110, the cover fixed mold 120, the body movable mold 210, and the body fixed mold 220 may need to reflect the area where the core pin or push pin is located, each cover mold The first cooling grooves 117 and 217 and the second cooling grooves 127 and 227 or the first heating grooves 115 and 215 and the second heating grooves ( 125, 225) may be provided.

The first cooling grooves 117 and 217 or the first heating grooves 115 and 215 may be formed on a vertical line with respect to the surface on which the molding part C is located. The first cooling grooves 117 and 217 are provided on a line perpendicular to the surface where the molding part C is located, that is, perpendicular to the movable surfaces of the cover movable mold 110 and the body movable mold 210, As the cooling modules 301 and 303 or the heating modules 401 and 403 are inserted and positioned, cooling or heating may be performed in the form of spot cooling or spot heating. Accordingly, temperature gradient control may be further facilitated by adjusting the temperature or number of each cooling module 300 or heating module 400 as needed. Furthermore, the second cooling grooves 127 and 227 or the second heating grooves 125 and 225 of the cover fixing mold 120 and the body fixing mold 220 are also on a vertical line with respect to the surface on which the molding part C is located. may have been formed.

The pressing part of the cover movable mold 110 or body movable mold 210 includes molten metal inflow regions 111 and 211 in which molten metal flows from the outside of the mold, the molten metal inflow regions 111 and 211, and the forming part ( C) includes a plurality of molten metal branching areas 113 and 213 formed at the boundary, and the first cooling grooves 117 and 217 are respectively the molten metal inflow areas 111 and 211 and the molten metal branching areas 113 and 213 It may be located on a vertical line with respect to The above molten metal diverging regions 113 and 213 pass through the molten metal inflow regions 111 and 211 and can be regarded as regions in which the molten metal speed rapidly increases. Accordingly, the temperature of the mold can be controlled by providing a cooling groove in the region where the speed of the molten metal increases and coupling the cooling module 300, thereby preventing mold erosion and cracking caused by the molten metal.

Also, in the temperature distribution of the mold, there may be a large temperature difference between the area of the forming part (C) adjacent to the overflow part (B) and the pressing part (A) due to the difference in the volume of the molten metal or the time when the molten metal is introduced. Such a temperature difference may cause internal defects or product deformation of the housing cover 10 and the body 20 manufactured in the molding part (C), and mold erosion by the molten metal of the pressing part (A) is relatively more Because it is done well, it can affect the life of the mold. Therefore, by inserting the cooling modules 301 and 303 into the area around the pressurizing part A, it is possible to prevent product defects by minimizing the temperature difference, and further improve the lifespan of the mold. Furthermore, by providing a plurality of first cooling grooves 117, 217 in the molten metal inflow region 111, 211 and the molten metal branch region 113, 213 and disposing the cooling modules 311, 313 in a spot cooling form, It is possible to adjust the cooling conditions of each of the cooling modules 311 and 313 located in the first cooling grooves 117 and 217 of the dog, which makes it easier to control the temperature in the mold, thereby reducing product defects due to temperature gradients, , the life of the mold can be further improved. In addition, since the manufacturing cycle interval can be further reduced by using the cooling modules 301 and 303, productivity can also be improved. In the above, the first cooling grooves 117 and 217 provided in the cover movable mold 120 and the body movable mold 220 and the cooling modules 301 and 303 coupled thereto have been described, but the cover fixing mold 120 and It is obvious that the effects of the second cooling grooves 127 and 227 provided in the body fixing mold 220 and the cooling modules 302 and 304 located therein are also the same.

The first heating grooves 115 and 215 may be located in a region from the center of the molded part (C) to a boundary between the molded part (C) and the overflow part (B). Since the temperature of the boundary region between the molding part (C) and the overflow part (B) is lower than the temperature between the molding part (C) and the pressing part (A), located in the first heating grooves (115, 215) By preheating before casting by the heating module (401, 403) to make the temperature of the molded part (C) uniform, internal defects of the cast product can be prevented, and even during casting, the heating module (401, 403) By providing heat between the boundary area of the flow part (B) and the center area of the molding part (C), the molding part ( Since the temperature of C) can be prevented from lowering, quality uniformity can be more helpful. Likewise in the case of the heating module, it is obvious that the effects of the second heating grooves 125 and 225 provided in the cover fixing mold 120 and the body fixing mold 220 and the heating modules 402 and 404 located therein are also the same. .

Furthermore, in the cover movable mold 110 or the body movable mold 210, a pair of the pressurizing portion A, the forming cavity portion C, and the overflow portion B are provided symmetrically, A temperature sensor 500 may be inserted and positioned between the symmetrical overflow parts (B). That is, the temperature sensor 500 is located in the central region between the heating modules 400 to check the temperature of the molding part C in the mold, and adjust the operating conditions of the heating module 400 according to the checked temperature. can

The high-pressure die-casting apparatus for manufacturing a vehicle controller housing according to an embodiment of the present invention can prevent heat cracking by minimizing the temperature shock of the pressurization unit (A) by including the cooling module 300 in the pressurization unit (A), There is an advantage that the mold life can be increased. In addition, by providing the cooling module 300 in the pressing part (A) and the heating module 400 in the molding part (C), the temperature deviation of the movable molds 110 and 210 or the stationary molds 120 and 220 is reduced. The occurrence of internal defects can be prevented, which has the effect of minimizing the occurrence of defects such as molding defects and deterioration of physical properties.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will variously modify and change the present invention within the scope not departing from the spirit and scope of the present invention described in the claims below. You will understand that it can be done.

10; housing cover
20; housing body
110; cover movable mold
120; cover fixed mold
210; body movable mold
220; body fixed mold
111, 211; Molten metal inflow area
113, 213; Molten metal branch area
115, 215; 1st heating groove
125, 225; 2nd heating groove
117, 217; 1st cooling groove
127, 227; 2nd cooling groove
300, 301, 302, 303, 304, 311, 313; cooling module
400, 401, 402, 403, 404; heating module

Claims (6)

A pair of cover movable mold and cover fixed mold for manufacturing the cover of the vehicle controller housing, and a pair of body movable mold and body fixed mold for manufacturing the body of the vehicle controller housing,
The cover movable mold or the body movable mold includes a press part into which molten metal flows, a molding part into which the molten metal flows into a product, and an overflow part through which excess molten metal flows from the molded part,
A plurality of first cooling grooves are formed in the region where the press part is located, and a cooling module is inserted into the first cooling grooves, and a plurality of first cooling grooves are formed in an area from the center of the molding part to the boundary between the molding part and the overflow part. A high-pressure die-casting device for manufacturing a vehicle controller housing, characterized in that a heating groove is formed and a heating module including a heating member and a heating module fixing member is inserted into the first heating groove.
According to claim 1,
The cover fixing mold or the body fixing mold further comprises a second cooling groove or a second heating groove in an area opposite to the cover movable mold or body movable mold, respectively. .
According to claim 1,
The first cooling groove or the first heating groove is a high-pressure die-casting device for manufacturing a vehicle controller housing, characterized in that formed on a vertical line with respect to the surface on which the molding part is located.
According to claim 1,
The press part of the cover movable mold or the body movable mold includes a molten metal inflow region into which molten metal flows from the outside of the mold, and a plurality of molten metal branching regions formed at a boundary between the molten metal inflow region and the forming part,
The first cooling groove is a high-pressure die-casting device for manufacturing a vehicle controller housing, characterized in that located on a vertical line with respect to the molten metal inlet area and the molten metal branch area, respectively.
delete According to claim 1,
In the cover movable mold or the body movable mold, a pair of the pressurizing part, the molding cavity part, and the overflow part are provided symmetrically from side to side,
A high-pressure die-casting device for manufacturing a vehicle controller housing, characterized in that a temperature sensor is inserted and positioned between the symmetrical overflow parts.

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