TW201936293A - Method of manufacturing housing - Google Patents

Abstract

Provided is a method of manufacturing a housing in which a vertical relationship is maintained between adjacent surfaces. The method of manufacturing a housing comprises: a first part forming step of forming a first part by injecting a molten metal into a cavity inside of a first die that has a first mold and a second mold and corresponds to a first part having two plate portions connected so that an angle formed by the main surfaces is 90 degrees, and molding the two main surfaces of the two plate portions with only one of the first and second molds; and a second part forming step of forming a second part by injecting a molten metal into a cavity inside of a second die that has a third mold and a fourth mold and corresponds to a second part having two plate portions connected so that an angle formed by the main surfaces is 90 degrees, and molding the two main surfaces of the two plate portions with only one of the third and fourth molds.

Description

Box making method

The present invention relates to a method of manufacturing a case in which a case is formed by die casting.

Conventionally, in the case of manufacturing a case in which a control substrate is housed, there is a case where a case is manufactured by die casting. Patent Document 1 discloses a case in which a control substrate is housed by die casting. In Patent Document 1, a case is manufactured by die casting using aluminum.
[Previous Technical Literature]
[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2001-357925

[The problem that the invention wants to solve]

In Patent Document 1, a plurality of components each having a U shape are manufactured by die casting, and the manufactured U-shaped components are assembled to manufacture a casing.

When manufacturing a part by die casting, a step of detaching a part manufactured by die casting from a mold is required. Generally, when a part is manufactured by die casting, the draft angle must be formed on the part in such a manner that it can be detached from the mold. Therefore, it is necessary to form the part with a tapered shape.

However, if the part is formed into a taper in order to detach from the mold, there is a possibility that the adjacent side faces of the case cannot maintain a vertical relationship with each other. In particular, when the part has three faces and the U-shaped shape is formed by the three faces, the adjacent faces cannot be maintained at right angles between the three faces of the part. The possibility of a relationship. Therefore, as a result of assembly and manufacture of the case, there is a possibility that adjacent faces cannot maintain a relationship of crossing at right angles.

As for the case in which the control board is housed, not only the wide surface is disposed to be grounded, but also the arrangement of the space is considered, and the narrower surface is grounded and placed in a standing state. In this case, when the adjacent side faces of the casing cannot maintain a vertical relationship with each other, it is considered that the casing is disposed in an inclined state. When the cabinet is tilted and disposed, the cabinet may fall over during the installation, and the impact may cause a failure of the casing.

Further, since the parts are formed into a taper shape in order to be detached from the mold, the result of assembling the case by the parts taken out from the mold is that the inner faces of the opposing faces in the case are not parallel to each other, and are inside the case. A part of the space is narrowed. In this case, the space inside the casing is narrowed, which results in a possibility that the capacity that can be accommodated in the casing is reduced.

Accordingly, the present invention has been made in view of the above circumstances, and an object thereof is to provide a method of manufacturing a case in which a relationship between adjacent surfaces is maintained perpendicular to each other.
[Technical means to solve the problem]

The method for producing a casing according to the present invention includes a first component forming step corresponding to a first component having two plate portions connected to each other at an angle of 90 degrees from the main surface. The molten metal is injected into the cavity of the first mold of the first mold and the second mold, and only one of the two first plate and the second mold is used to form two of the two main faces. Thereby, the first component is formed, and the second component forming step corresponds to the second component having the two plate portions that are connected at an angle of 90 degrees from the main surface, and has the third mode and the The molten metal is injected into the cavity of the second mold of the fourth mold, and only one of the two molds is formed by one of the third mold and the fourth mold. The second component; the housing forming member assembly step of assembling the first component obtained in the first component forming step and the second component obtained in the second component forming step, And forming a box forming member having three plate portions; and a box forming step of using the above box The casing member to the assembly obtained forming step is to form the casing member.

In the method of manufacturing the casing having the above configuration, the first part having the first mold and the second mold is associated with the first member having the two plate portions connected to each other at an angle of 90 degrees from the main surface. A molten metal is injected into a cavity of the mold, and only one of the first die and the second die is used to form two main faces of the two plate portions, thereby forming a first component forming step of the first component. The first part is formed, and the second part of the second mold having the third mold and the fourth mold is corresponding to the second member having the two plate portions connected to each other at an angle of 90 degrees from the main surface. The molten metal is injected into the cavity, and only one of the two mold portions is molded by only one of the third mold and the fourth mold, whereby the second part is formed in the second part forming step of forming the second part. Therefore, the first part and the second part having the two plate portions that are connected at an angle of 90 degrees from the main surface can be formed separately. Therefore, the box system formed using these parts is formed so that the angle formed by the main surface in the adjacent surface becomes 90 degrees.

Further, in the first component forming step and the second component forming step, each of the cavities may be formed inside each of the first die and the second die, and the main faces of the two plate portions may be formed to intersect each other. The intersection line is formed in such a manner as to be the lowermost position.

Since the intersection of the main surfaces of the two plate portions and the two main portions of the first mold and the second mold is formed at the lowermost position, the first component and the second component can be smoothly performed. The first mold and the second mold are separated.

Further, in the first component forming step and the second component forming step, each of the cavities may be in a direction in which the one plate portion extends from the intersection line in each of the first mold and the second mold. The first part and the second part are formed in a posture in which the horizontal plane is inclined.

In the inside of the first mold and the second mold, the first part and the second part are formed in a posture in which the direction in which the intersection line formed by the one surface portion intersects with the outer surface of the two plate portions is inclined with respect to the horizontal plane. Therefore, the separation of the first part and the second part from the first mold and the second mold can be performed more smoothly.

Further, the melt may be formed by melting aluminum.

Since the melt is formed by melting aluminum, the box system produced is formed of aluminum. Since the casing is formed of aluminum, the heat generated inside the casing can be efficiently radiated to the outside.

Further, the case may be a case for a controller that houses the control board.

Since the casing is a casing for a controller that accommodates the control substrate, the casing for the controller can be formed at a right angle between the surfaces on the outer side and the outer surfaces.

Moreover, the control substrate may be a control substrate for controlling the robot.

Since the box system houses the controller for controlling the control board of the robot, the controller case for accommodating the control board for controlling the robot can be mutually adjacent to each other on the outer side surfaces. Formed in a right angle.

Moreover, the method for producing a casing according to the present invention includes a third component forming step corresponding to a third component having two plate portions that are connected at an angle of 90 degrees from the main surface. Injecting a molten metal into a cavity of the third mold having the fifth mold and the sixth mold, and forming only one of the two of the two plate portions by using only one of the fifth mold and the sixth mold. The main surface forms the third component; the casing forming member assembly step of assembling the two third components obtained by the third component forming step and assembling the two third components a case forming member having three plate portions; and a case forming step of forming the case using the case forming member obtained in the box forming member assembling step.

In the method of manufacturing the casing having the above configuration, the third member having the second plate portion and the sixth mold portion having the angle of 90 degrees from the main surface corresponds to the third member. A molten metal is injected into a cavity of the mold, and only one of the second mold and the sixth mold is used to form two main faces of the two plate portions, thereby forming a third component forming step of the third component. The third part is formed, and the two third parts are assembled, and the two third parts are assembled, thereby forming the box forming member having three plate portions. Therefore, the angle formed by the main surface can be 90. The two third parts of the two boards are connected in a way. Therefore, the box system formed using the two third parts is formed so that the angle formed by the main surfaces in the adjacent surfaces becomes 90 degrees.
[Effects of the Invention]

According to the present invention, since the casing formed so that the angle formed by the main surface in the adjacent surface is 90 degrees is produced, it is possible to provide a casing which can be placed in a stable state even if the ground surface is changed.

Hereinafter, a method of manufacturing a casing according to an embodiment of the present invention will be described with reference to the accompanying drawings.

Fig. 1 is a perspective view showing a casing 100 produced by a method for producing a casing according to an embodiment of the present invention.

In the present embodiment, the casing 100 has a rectangular parallelepiped shape. Therefore, the surfaces of the casings 100 which are adjacent to each other are formed at right angles to each other. The cabinet 100 houses the control panel of the robot and is configured as a cabinet for controlling the robot controller of the robot.

FIG. 2 is a view showing a configuration in which the casing 100 of the present embodiment is used as a casing for controlling the robot controller of the robot 60.

As shown in FIG. 2, the casing 100 of the present embodiment houses therein a control substrate 80 for controlling the operation of the robot 60. Therefore, the casing 100 functions as a controller casing that houses the control substrate 80. In the present embodiment, the robot 60 is used as a multi-axis industrial robot.

Further, in the present embodiment, the robot controlled by the control substrate housed in the casing has been described as an industrial robot. However, the present invention is not limited to the above embodiment. The robot controlled by the control substrate housed inside the cabinet may be other types of robots. The robot can be any form as long as it is controlled by the control substrate inside the cabinet. Moreover, the control board housed inside the case may not be used to control the robot. Inside the cabinet, a control substrate for controlling the robot other than the robot can also be accommodated. Moreover, the inside of the case may not be a control substrate. The present invention can also be applied to a case for housing a control substrate.

In the present embodiment, the casing 100 is formed of aluminum. In the case where the casing 100 is used as a robot controller, a large amount of heat is generated from the control substrate 80 during the operation of the robot 60. Therefore, the case 100 is formed of aluminum having high heat dissipation.

Further, in the present embodiment, the case 100 having the rectangular parallelepiped shape is formed using the case forming member 10 having a U-shaped cross section.

FIG. 3 shows a perspective view of the two case forming members 10 constituting the case 100. The case forming member 10 has a face that is located at a lower portion of the case 100 and is grounded.

The case forming member 10 is vertically connected by three plate-like portions, and the cross section is formed in a U shape. Further, the case forming member 10 having a U-shaped cross section is formed by assembling two L-shaped members.

FIG. 4 is a perspective view showing the case forming member 10 in a state in which the case forming member 10 is divided into two parts (first parts, second parts) 11 and 12.

The parts 11 and 12 are connected so that the angle formed by the main surfaces of the plate portions of the two plate-like portions is 90 degrees, and the cross section is formed into an L shape. In the present embodiment, the part 11 is connected so that the angle formed by the main surfaces of the two plate portions 11a and 11b is 90 degrees, and the cross section is formed into an L shape. In other words, the two plate portions 11a and 11b are connected such that the angle formed by the main surface becomes 90 degrees. In the present embodiment, the outer surfaces of the main plate portions 11a and 11b of the two plate portions 11a and 11b are the outer surfaces. Similarly, the part 12 is connected such that the angle formed by the main faces of the two plate portions 12a and 12b is 90 degrees, and the cross section is formed into an L shape. In other words, the two plate portions 12a and 12b are connected such that the angle formed by the main surface becomes 90 degrees. In the present embodiment, the outer surfaces of the main plate portions 12a and 12b of the two plate portions 12a and 12b are the outer surfaces.

Next, a method of manufacturing the casing 100 will be described.

In the present embodiment, a part 30 constituting one of the casing forming members 10 and having an L-shaped cross section is formed by die casting. The component 30 is configured such that the cross section is L-shaped by the two orthogonal plate portions 30a and 30b.

Fig. 5 is a cross-sectional view showing the mold 50 and the component 30 when the component 30 is formed by die casting.

The mold (first mold) 50 has an upper mold (first mold) 51 and a lower mold (second mold) 52. The upper mold 51 and the lower mold 52 are configured to be relatively close to and away from each other.

A cavity 53 corresponding to the shape of the part 30 is formed between the upper mold 51 and the lower mold 52. The cavity 53 is formed by forming a part 30 formed by the two orthogonal plate portions 30a and 30b by die casting. When the part 30 is produced, a molten metal obtained by melting aluminum is pressed into the cavity 53. Thereafter, the melt is cooled inside the cavity 53, so that the melt solidifies, thereby forming the part 30. Therefore, as a result, the part 30 having a shape along the shape of the cavity 53 and formed of aluminum is formed.

The cavity 53 is formed in the mold 50 corresponding to the component 30, and has plate cavity molds 53a and 53b corresponding to the two orthogonal plate portions 30a and 30b. The cavity 53 is formed in the inside of the mold 50, and the intersection line 1 formed by the main surfaces of the two plate portions 30a and 30b intersecting each other is disposed at the lowermost position. In other words, the cavity 53 is formed so that the position corresponding to the intersection line 1 formed by the intersection of the two plate portions is located at the lowermost side in the mold 50. Further, a cavity 53 is formed in such a manner that the component 30 is formed in a posture in which the direction in which the one plate portion 30b extends from the line of intersection 1 with respect to the horizontal plane. Therefore, in the cavity 53, the position corresponding to the intersection line 1 formed by the intersection of the two plate portions 30a and 30b is located at the lowermost position. Further, in the cavity 53, the direction in which the portion forming the plate portion 30b extends from the intersection line 1 is formed to be inclined with respect to the horizontal plane.

Therefore, in the present embodiment, in the two plate portions 30a and 30b formed as the component 30, the component 30 is formed in an attitude in which the extending direction of the lower plate portion 30b in the mold 50 is inclined with respect to the horizontal plane. In the present embodiment, the component 30 is formed in a posture in which the extending direction of the plate portion 30b is inclined at an angle α of 1 degree or more and 2 degrees or less with respect to the horizontal plane.

Further, since the two plate portions 30a and 30b formed as the component 30 are orthogonal to each other, the two plate portions 30a and 30b formed as the component 30 are opposed to each other in the extending direction of the upper plate portion 30a in the mold 50. The part 30 is formed in a posture inclined in the vertical direction. In the present embodiment, the component 30 is formed in a posture in which the extending direction of the plate portion 30a is inclined at an angle α of 1 degree or more and 2 degrees or less with respect to the vertical direction. In particular, the angle α of the plate portion 30b inclined with respect to the horizontal plane and the angle α of the extending direction of the plate portion 30a with respect to the vertical direction are preferably 1.5 degrees or more. Further, in the case where the ground is excessively inclined, it may be difficult to separate from the mold depending on the shape of the screw hole or the like formed in the plate portion. Therefore, in the present embodiment, the angle α of the plate portion 30b inclined with respect to the horizontal plane and the direction α of the extending direction of the plate portion 30a with respect to the vertical direction are preferably angles of 1 degree or more and 2 degrees or less.

The steps of forming the component 30 by die casting will be described with reference to Figs. 6(a) to 6(d). In addition, FIG. 7 is a flowchart showing a flow of the case where the casing 100 is produced by the method of manufacturing the casing 100 of the embodiment.

First, as shown in Fig. 6(a), the upper mold 51 and the lower mold 52 are brought into close contact with each other, and as shown in Fig. 6(b), the upper mold 51 and the lower mold 52 are brought into contact with each other. The upper mold 51 abuts against the lower mold 52 and the mold 50 is closed, whereby the cavity 53 is formed between the upper mold 51 and the lower mold 52.

When the cavity 53 is formed, as shown in FIG. 6(c), a molten metal in which aluminum is heated and melted is injected into the cavity 53 formed by tilting in the mold 50. Here, the molten metal is injected into the cavity 53 in a state where pressure is applied to the melt so that the melt spreads through the respective corners of the cavity 53. Thus, the molten hydraulic pressure is introduced into the inside of the cavity 53 (S1).

When the melt hydraulic pressure is introduced into the cavity 53 and the mold 50 is cooled, the melt is solidified inside the mold 50, whereby the part 30 is formed into a shape corresponding to the cavity 53. Thereby, the part 30 which becomes a desired shape is formed in the inside of the cavity 53.

When the part 30 is formed inside the cavity 53, the upper mold 51 and the lower mold 52 in the mold 50 are away from (S2). When the upper mold 51 and the lower mold 52 are separated, the part 30 formed between the upper mold 51 and the lower mold 52 is taken out from the cavity 53 as shown in Fig. 6(d). In the present embodiment, when the upper mold 51 and the lower mold 52 are relatively far apart, the component 30 is taken out from the cavity 53 while the component 30 is attached to the upper mold 51. When the part 30 is taken out of the cavity 53, the part 30 is removed from the upper mold 51, and the part 30 is taken out from the mold 50 (S3).

At this time, the mold 50 is divided into two parts of the upper mold 51 and the lower mold 52, and only one of the upper surfaces 51 and 30b is molded by one of the upper mold 51 and the lower mold 52. (Main surface), whereby the part 30 is formed. In the present embodiment, two outer surfaces (main surfaces) of the two plate portions 30a and 30b are formed by molding of the lower mold 52.

As described above, in the present embodiment, the component 30 is produced by die casting. In the present embodiment, a plurality of components 30 having different types are formed by die casting, and one of the components 11 is used as one of the components 11 and 12 (the first component) 11 constituting the casing forming member 10. Features. Further, the mold forming the one part 11 functions as a mold (first mold) 50. As described above, one of the parts 11 and 12 constituting the case forming member 10 is formed by die casting (first part forming step). When a part 11 is formed inside a mold 50, a part 11 is taken out from a mold 50 (S3).

When a part 11 is formed by die casting, another part (second part) 12 of the parts 11, 12 constituting the case forming member 10 is formed.

As shown in FIG. 4, since the shape of one part 11 is different from that of the other part 12, when the other part 12 is produced, the mold (the first mold) used when the one part 11 is produced is used. Mold (second mold). However, since one part 11 has substantially the same configuration as the other part 12, in the manufacturing step of the other part 12, the same manufacturing steps as the manufacturing steps of one part 11 are used. Therefore, when another part 12 is produced, it can also be produced by the manufacturing steps shown in FIGS. 6(a) to 6(d).

In other words, as shown in Fig. 6(a), the upper mold (third mold) and the lower mold (fourth mold) are separated from the other mold (second mold), as shown in Fig. 6(b). The other mold upper mold abuts the lower mold to form a cavity between the molds. When a cavity is formed between the upper mold and the lower mold of the other mold, as shown in Fig. 6(c), the molten metal is pressed into the inside of the cavity formed by tilting in the other mold (S4). When the melt is pressed into the other mold, the other mold is cooled, and the melt is solidified inside the other mold, thereby forming another part. Thereby, another part (second part) is formed inside the cavity (second part forming step). When another part is formed inside the cavity, the upper die and the lower die are separated from each other in the other mold (S5). By the upper mold being separated from the lower mold, as shown in Fig. 6(d), another part formed between the upper mold and the lower mold is attached to the upper mold and taken out from the mold cavity. When another part is taken out of the cavity, the other part is removed from the upper mold, and the other part is taken out from the other mold (S6).

Further, in the present embodiment, the configuration in which the two members 11 and 12 have mutually different shapes has been described. Therefore, the form in which the shape of the cavity is different between the mold (first mold) for forming the part 11 and the other mold (second mold) for forming the part 12 has been described. However, the present invention is not limited to the above embodiment. The shape of the part 11 (first part) and the shape of the part 12 (second part) may be the same shape.

In this case, the mold for forming the part 11 and the mold for forming the part 12 may also be common. It is also possible to form two parts (third parts) having the same shape by using a common mold (third mold) having a common upper mold (fifth mold) and a lower mold (sixth mold) to form a constituent box. The body forms two parts of the member 10. In other words, the step of forming two common parts (third parts) (the third part forming step) is performed twice, and two common parts are formed. As described above, since two parts (third parts) are produced by the common mold, the number of required molds can be reduced, and the manufacturing cost of the case 100 can be suppressed to be small.

When both of the two parts 11, 12 constituting the case forming member 10 are formed by die casting, the case forming member 10 is formed by assembling the parts 11 and 12 (the case forming member assembling step) (S7) ). In the present embodiment, the two parts 11 and 12 are fastened to each other by screws, whereby the case forming member 10 is assembled.

Further, when two parts are formed by a common mold, the box forming member 10 can be formed by using two parts which are obtained in common and assembling the two parts. At this time, the case forming member 10 can also be assembled by fastening the two common parts by screws.

The case forming member 10 is formed by fastening the two parts 11, 12 to each other. In the present embodiment, the plate portion 11b of the two plate portions 11a and 11b of the one component 11 and the plate portion 12a of the plate portions 12a and 12b of the other component 12 are connected to each other to form one. Plate portion 13. Therefore, as a result, the case forming member 10 has three plate portions 11a, 13, and 12b.

Since the plate portion 11a constituting the one part 11 and the plate portion 11b are connected so that the angle formed by the main surface is 90 degrees, the angle between the plate portion 11a and the plate portion 13 at the outer side faces becomes 90 degrees. The way to connect. Further, since the plate portion 12a and the plate portion 12b constituting the other component 12 are connected such that the angle formed by the outer surfaces thereof is 90 degrees, the plate portion 11a and the plate portion 13 are formed by the outer surfaces. The corners are connected in a 90 degree manner. Therefore, the three plate portions 11a, 13 and 12b constituting the casing forming member 10 are connected in a U shape so that the angle formed by the outer surfaces is 90 degrees.

When the case forming member 10 is formed, the case forming member 10 is used to form the case 100 (case forming step) (S8). In the present embodiment, the casing 100 is formed by attaching the other side surface to the U-shaped box forming member 10 and attaching the surface on the upper side of the casing 100.

As shown in Fig. 1, in the casing 100, the surface F1 which is grounded to the bottom surface, the surface F2 which is adjacent to the surface F1, and the surface (not shown) which faces the surface F2 are integrally formed into a casing by die casting. The member 10 is formed. The surface of the surface forming member 10 is attached to the surface F1, the surface F2, and the surface other than the surface facing the surface F2, and the casing 100 is formed.

As described above, the parts 11 and 12 obtained by die casting are assembled to form the case forming member 10, and the case forming member 10 is used to form the case 100.

Further, in the above-described embodiment, the configuration in which the two parts 11 and 12 are assembled by the fastening of the screws to form the case forming member 10 has been described. However, the present invention is not limited to the above embodiment, and the assembly of the components may be performed by a method other than fastening with a screw. For example, the assembly of the parts can be performed by other methods such as adhesion by an adhesive.

According to the present embodiment, the parts 11 and 12 are formed by die casting, and the parts 11 and 12 are assembled, whereby the case forming member 10 is formed. Each of the parts 11 and 12 which divide the case forming member 10 is formed by die casting. Therefore, when the parts 11 and 12 are produced by die casting, the parts 11 and 12 having two plate parts are separately formed. Therefore, the parts 11 and 12 can be formed into an L-shaped type in which two plate parts are connected. shape. In addition, since each of the parts 11 and 12 has two plate portions and is formed in an L shape, the two plate portions can be connected to each other in a state in which the angle formed by the outer faces is 90 degrees. Parts 11 and 12 are formed. Thereby, the casing 100 is formed by connecting the adjacent surfaces of the casing forming member 10 so that the angle formed by the outer surfaces is 90 degrees. Therefore, in the casing 100, the angle between the outer surface faces is 90 degrees between the adjacent plate members. Thereby, in the casing 100, the angle formed by the surfaces on the outer side between the adjacent plate members can be maintained at 90 degrees.

In particular, the plate portions 11a, 13 and 12b are connected to each other such that the angle formed on the outer surfaces of the three plate portions 11a, 13 and 12b constituting the casing forming member 10 is 90 degrees. Since the angle between the adjacent surfaces of the casing 100 is maintained at 90 degrees, the casing 100 can be placed in a stable state even if the grounded surface of the casing 100 is changed. Since the cabinet 100 can be stably disposed even if the posture of the casing 100 is changed according to the installation space of the casing 100, the space for placing the smaller space of the casing 100 can be emptied according to the space. The cabinet 100 is placed in a space change posture. For example, in the case of a space in which only a narrow and narrow space is provided, the posture of the casing 100 can be changed according to the installation space, and the casing 100 can be stably arranged. Thereby, the space for setting the cabinet 100 can be used more efficiently. Moreover, since the casing 100 can be stably disposed, the casing 100 can be prevented from falling over, and the reliability of the casing 100 can be improved. Therefore, when the case 100 is used as a controller of the robot, the reliability of the controller can be improved.

In particular, when the robot is installed, depending on the installation location of the robot, there is a case where the installation space of the casing 100 as the controller that houses the control substrate 80 is limited. In such a case, it is required to arrange the case 100 in a space by changing the posture according to the limited space. For example, when the installation space is an elongated shape, the cabinet 100 is placed in the installation space in consideration of the state of the casing 100 shown in FIG. In the state shown in FIG. 1, the casing 100 is disposed in a state in which the surface F1 is grounded, but is disposed in a state in which the surface F2 is grounded in consideration of changing the posture. As described above, the cabinet 100 is placed by changing the posture, and when the installation space is elongated, the cabinet 100 can be disposed in accordance with the elongated installation space. Thereby, the setting space can be used efficiently.

Moreover, since the relationship between the adjacent surfaces of the casing 100 is maintained, the quality of the design of the casing 100 can be improved.

Further, in the present embodiment, the mold 50 is divided into two parts of the upper mold 51 and the lower mold 52, and only one of the upper mold 51 and the lower mold 52 is used to form two of the two plate portions 30a and 30b. The outer faces (main faces), thereby forming the part 30. Therefore, the one of the plate portions 30a and 30b which is the outer surface of the main surface is formed by one die (lower die 52). In this way, the angle formed by the surfaces on the outer side of the main surface of the plate portions 30a and 30b is 90 degrees, and the outer surface of the plate portions 30a and 30b can be accurately formed.

Further, the part 30 is formed in an inclined posture inside the mold 50. Inside the mold 50, the intersection line 1 formed by the intersection of the outer surfaces of the two plate portions 30a and 30b is disposed at the lowermost position, and the direction in which the one plate portion 30b extends from the intersection line 1 with respect to the horizontal plane The inclined posture forms the part 30 to form the cavity 53. Therefore, the cavity 53 is formed inside the mold 50 so as to be convex toward the lower side. Each of the portions of the cavity 53 corresponding to the plate portions 30a, 30b is configured to have a draft angle. Therefore, the part 30 produced by the mold 50 is formed so that the two plate portions 30a and 30b are orthogonal to each other, and the draft angle when the mold 30 is detached from the mold 30 is ensured. Since the surface on the outer side of the plate portion 30a is inclined with respect to the vertical direction, the surface on the outer side of the plate portion 30b is inclined with respect to the horizontal direction, so that the draft angle of the component 30 is ensured. Therefore, when the component 30 is produced by die casting and the component 30 is taken out from the mold 50, the component 30 can be smoothly taken out from the mold 50.

Further, not only the outer surface but also the orthogonal relationship between the two plate members of the members 11 and 12 which are produced by die casting is maintained, so that the case formed by assembling the components 11 and 12 is maintained. The relationship of the adjacent plate members in the member 10 to each other in an orthogonal relationship. Therefore, when the cabinet 100 is assembled, the orthogonal relationship between the adjacent plate members in the casing 100 is maintained. At this time, the relationship between the orthogonal members of the plate members constituting the case forming member 10 in the casing 100 is maintained.

Further, in the present embodiment, it is not necessary to form the draft angle for the component, and it is not necessary to form the side surface of the plate portion constituting the component into a tapered shape, so that the thickness of each of the plate portions can be uniformly formed. Therefore, the quality of the design of the cabinet 100 can be further improved. Further, since the thickness of the plate portion constituting the component can be uniformly formed, the periphery of the portion where the plate portions are connected to each other can be formed without being thick. Therefore, it is possible to ensure a larger space around the portion where the plate portions are connected to each other. Thereby, it is possible to accommodate an accessory or the like in a space around the portion where the plate portions are connected to each other, and it is possible to accommodate more as a case. In this way, the space inside the cabinet can be used more efficiently.

Generally, in the case where the cabinet is used as a controller of the robot, there is a high possibility that the cabinet becomes relatively large. In the case where the case is small, even if the angle between the adjacent faces of the case is offset from 90 degrees in order to form the draft angle from the mold, the influence is small, so Will cause problems. However, in the case where the size of the casing becomes large, even if the angle formed by the adjacent faces is slightly shifted from 90 degrees, the influence is also increased. When the size of the casing is large, even if the angles formed by the adjacent faces are slightly offset from 90 degrees, the magnitude of the slope generated by the offset becomes larger, and the ends of the opposite faces are mutually The height difference also becomes larger. Therefore, when the posture is changed so as to change the grounded surface of the casing, the grounded surface of the casing is inclined, so that the arrangement of the casing may become unstable. Since the casing is disposed in an unstable state, there is a possibility that the casing falls over when there is contact or shaking during the arrangement of the casing.

It is a matter of course that when a relatively large casing is produced by die casting, the angle at which the intersecting faces of the adjacent faces due to the draft is formed is removed from the protruding portion due to the offset of the right angle. situation. Thereby, it is possible to produce a case in which the angles formed by the adjacent faces are maintained at 90 degrees. However, in the method of removing the protruding portion by cutting as such, the step of removing the protruding portion in the casing is required, and accordingly extra time and labor are required. Further, the removed portion is discarded uselessly, and accordingly, a large amount of material is required, and the manufacturing cost of the portion of the additional material becomes high.

In the case 100 of the present embodiment, even in the case of the case 100 having a large size, the draft angle from the die 50 can be ensured while maintaining the relationship between the plates 30a and 30b in an orthogonal relationship. . Since the angle formed between the maintaining plate portions 30a and 30b is 90 degrees, the angle between the adjacent faces in the casing 100 is maintained at 90 degrees. Therefore, when the posture is changed so as to change the grounded surface of the casing 100, the casing 100 can be placed in a stable state.

Further, in order to maintain the draft angle and maintain the angle between the adjacent faces at 90 degrees, it is also considered to change the structure of the mold. It is considered that the relationship between the adjacent faces in the member is maintained at right angles by changing the mode of clamping and the mode of opening and closing of the molds in the mold. However, in order to mold and mold the molds in the mold, and to change the mold to the mold, the shape and operation of the mold are complicated. Therefore, there is a possibility that the manufacturing cost of the mold becomes large.

In the present embodiment, the mold 50 is divided into two parts of the upper mold 51 and the lower mold 52, and only one of the upper mold 51 and the lower mold 52 is used to form two outer sides of the two plate portions 30a and 30b. The face (main face) is thereby formed into the part 30. The mold 50 is divided into two parts of the upper mold 51 and the lower mold 52, and the angle formed by the surfaces on the outer side of the main surfaces of the plate portions 30a and 30b is 90 degrees, and the plate portion 30a is formed with high precision. Since the outer surface of the 30b is the surface of the outer side of the 30b, the mold 50 which is simply configured can be accurately formed so that the angle formed by the outer surfaces becomes 90 degrees. Since the configuration of the mold 50 can be simplified, the manufacturing cost of the casing 100 can be suppressed to be small.

Further, in the present embodiment, the components 30 for forming the casing 100 are each formed of aluminum, and as a result, the casing 100 is formed of aluminum. Therefore, the cabinet 100 maintains high heat dissipation performance.

In the present embodiment, the casing 100 houses a control board 80 for controlling the operation of the robot 60, and is configured as a robot controller. Therefore, a large amount of heat is generated from the control substrate 80. In the present embodiment, since the casing 100 is formed of aluminum, the heat generated from the control substrate 80 is efficiently released to the outside of the casing 100. Therefore, the influence of the function of the control substrate 80 by heat can be suppressed to be small.
Moreover, since the case 100 is made of aluminum, the case 100 can be made lighter. Therefore, the handling of the cabinet 100 can be easily performed.

Further, in the present embodiment, the component 30 made of aluminum is produced by die casting. Therefore, the part 30 which is an article of aluminum can be produced in a large amount by low cost by die casting.

Further, since the L-shaped component 30 is assembled to form the U-shaped case forming member 10, and the box-shaped case 100 is formed by using the case forming member 10, it can be performed at the stage of the L-shaped component 30. The operation of mounting the substrate or accessories on the part 30. Since the substrate or the accessory is attached to the component 30 at the stage of the L-shaped component 30, the mounting of the substrate or the accessory to the component 30 can be performed in the space in which the upper side is opened. Therefore, it is easy to mount the substrate or the accessory to the case 100, and assembly including the mounting work can be easily performed.

Further, in the present embodiment, as shown in Fig. 4, various processes are performed on the inner surface of the casing 100. In particular, when the case 100 is used as a controller of the robot, when the substrate is mounted inside the case 100, the heat generated in the substrate is transferred to the side of the case 100 to absorb the case 100 side. For heat, there is a case where one of the sides of the cabinet 100 is used as a heat sink. In this case, since the portion on which the substrate is placed and the portion that functions as the heat sink are formed inside the side surface of the casing 100, the shape of the inner side of the side surface of the casing 100 may be complicated.

When the inner side of the side surface of the casing 100 is made into a complicated shape as described above, there is a case where the inner side portion of the side surface of the casing 100 is processed by machining. When the machining for forming the inner surface of the casing 100 into a complicated shape is performed by machining, the cutting tool must be placed in a space surrounded by the plate-shaped member so that the blade touches the plate shape. The inside of the component. In the case where the member is formed in a U shape, it is useful to limit the space in which the blade is placed, and it is difficult to place the blade into a space surrounded by the plate-shaped member.

In the present embodiment, the inner surface can be processed at the stage of the component 30. In the present embodiment, the U-shaped box forming member 10 is divided into the L-shaped parts 30 at the middle of the process of manufacturing the casing 100. Since the inner surface can be processed at the stage of the L-shaped component 30, the upper side is opened, and the inner surface of the component 30 can be processed without restricting the space. Therefore, the processing of the inner surface of the component 30 can be easily performed with high precision.

Further, since the substrate or the accessory is attached to the component 30 at the stage of the L-shaped component 30, when the accessory is attached to the side of the inner side of the casing 100, the back surface of the component 30 can be stably grounded. Install the accessories.

Fig. 8 is a side view showing the part 30 of each step in the case where the accessory 30 is attached. In Fig. 8, a description will be given of an embodiment in which two substrates as accessories are attached to the component 30.

First, as shown in FIG. 8(a), the substrate 70 disposed on the lower side of the ground portion 30b of the component 30 is mounted. The substrate 70 is mounted along the inner side of the plate portion 30b. At this time, the substrate 70 can be stably attached to the plate portion 30b in a state where the surface on the outer side of the plate portion 30b on the ground side is grounded.

When the substrate 70 is attached to the plate portion 30b on the ground side, as shown in FIG. 8(b), the posture of the component 30 is changed, and the grounded surface is changed. Thereby, the grounded plate portion 30b is erected when the substrate 70 is mounted, and the upright plate portion 30a is grounded when the substrate 70 is mounted.

When the part 30 is changed in posture and the plate portion 30a is grounded, the substrate 71 mounted on the upper surface is attached to the plate portion 30a. The substrate 71 is attached along the direction in which the plate portion 30b extends from the side surface of the plate portion 30a. At this time, the substrate 71 can be stably attached to the plate portion 30a in a state where the surface on the outer side of the plate portion 30a on the side to be grounded is grounded.

In the present embodiment, in order to attach the substrate 71 to the plate portion 30a, the substrate 71 is attached to the plate portion 30a via the support portion 72. The substrate 71 is attached to the support portion 72, and the support portion 72 is attached to the plate portion 30a by a screw via a hole 73 formed in the support portion 72. Therefore, the support portion 72 can be attached to the plate portion 30a by screws in a state where the screw is orthogonal to the plate portion 30a. Thereby, the support portion 72 can be attached to the plate portion 30a in a stable state.

As described above, in the present embodiment, since the accessory is attached to the L-shaped component 30, the accessory can be attached to the panel portion 30b while the outer surface of the panel portion 30b is grounded. Further, an accessory can be attached to the inner surface of the plate portion 30a in a state where the outer surface of the plate portion 30a is grounded. Therefore, it is possible to attach an accessory to both of the two plate portions of the L-shaped component 30 while the plate portion is grounded and stabilized. Therefore, the accessory can be easily attached to the cabinet 100. Moreover, the accessory can be reliably attached to the case 100, and the reliability of the case 100 can be improved.

Further, in the above embodiment, the form in which the molten aluminum is melted has been described, but the present invention is not limited to the above embodiment. The melt can also be formed from materials other than aluminum. Other types of melts can be used as long as the metal can be formed into a box.

30‧‧‧ parts

30a, 30b‧‧‧ board

50‧‧‧Mold

51‧‧‧上模

52‧‧‧Down

53‧‧‧ cavity

100‧‧‧ cabinet

Fig. 1 is a perspective view of a casing produced by a method for producing a casing according to an embodiment of the present invention.

Fig. 2 is a view showing a configuration of a casing and a robot when the casing of Fig. 1 is used as a casing for a robot controller.

Figure 3 is a perspective view of a case forming member located at a lower portion of the case of Figure 1.

4 is a perspective view of a case forming member in a state in which the case forming member of FIG. 3 is divided into two parts.

Fig. 5 is a cross-sectional view showing a mold and a part when a part constituting the case forming member of Fig. 3 is formed by die casting.

Figs. 6(a) to 6(d) are views showing the steps of the steps in forming the components constituting the casing forming member of Fig. 3 by die casting.

Fig. 7 is a flow chart showing the flow when the casing of Fig. 1 is produced.

Fig. 8 is a side view showing the parts of the respective steps in the case where the accessory is attached to the inside of the component forming the casing forming member of Fig. 3.

Claims (7)

A method for manufacturing a box, characterized by having: The first part forming step corresponds to the first part having the two plate portions that are connected at an angle of 90 degrees from the main surface, and is inside the first mold having the first mold and the second mold. Injecting a molten metal into the cavity, and forming the first component by forming only one of the two main plates by using one of the first die and the second die; The second part forming step corresponds to the second part having the two plate portions connected at an angle of 90 degrees from the main surface, and is inside the second mold having the third mold and the fourth mold. Injecting a molten metal into the cavity, and forming the second component by forming only one of the two main plates by using only one of the third die and the fourth die; The casing forming member assembling step of assembling the first component obtained in the first component forming step and the second component obtained in the second component forming step to form three plates a box forming member; and A case forming step of forming the case using the above-described case forming member obtained in the above-described case forming member assembling step. The method of manufacturing the casing according to claim 1, wherein in the first component forming step and the second component forming step, each of the cavities is used in each of the first mold and the second mold. The inside of the two plate portions is formed such that the intersection faces formed by the intersection of the main faces are formed at the lowermost position. The method of manufacturing the casing according to claim 2, wherein in the first component forming step and the second component forming step, each of the cavities is used in each of the first mold and the second mold. The inside is provided in such a manner that the first part and the second part are formed in a posture in which a plate portion is inclined with respect to a horizontal plane in a direction in which the line intersects. The method for producing a case according to any one of claims 1 to 3, wherein the melt is formed by melting aluminum. The method of manufacturing a casing according to any one of claims 1 to 3, wherein the tank system houses a casing for a controller of a control substrate. The method of manufacturing the casing according to claim 5, wherein the control substrate is used to control a control substrate of the robot. A method for manufacturing a box, characterized by having: The third part forming step corresponds to the third part having the two plate portions that are connected at an angle of 90 degrees from the main surface, and is inside the third mold having the fifth mold and the sixth mold. Injecting a molten metal into the cavity, and forming the third component by forming only one of the two main plates by using one of the fifth die and the sixth die; a casing forming member assembling step of assembling the two third members obtained in the third component forming step and assembling the two third members, thereby forming a casing forming member having three plate portions; and A case forming step of forming the case using the above-described case forming member obtained in the above-described case forming member assembling step.