WO2020217924A1

WO2020217924A1 - Method for manufacturing metal molded body, and metal molded body

Info

Publication number: WO2020217924A1
Application number: PCT/JP2020/015284
Authority: WO
Inventors: 稔常石; 河原　敬二; 千春立川目; 俊和執行
Original assignee: 日立オートモティブシステムズ株式会社
Priority date: 2019-04-26
Filing date: 2020-04-03
Publication date: 2020-10-29
Also published as: JP2022100422A

Abstract

In the present application it is assumed that a metal molded body, manufactured by causing molten metal to flow into a casting mold, has a plate-shaped portion having a plate thickness T formed on a mold dividing surface of a side surface thereof. By shearing the plate-shaped portion in a position a distance at most equal to T/5 from the side surface of the metal molded body, not only can the generation of burrs on the mold dividing surface be suppressed, but said burrs can also be reliably removed.

Description

Manufacturing method of metal molded body and metal molded body

The present invention relates to a method for manufacturing a metal molded body in which burrs are removed by performing a shearing process after die casting, and in particular, a metal molded body provided with a connector insertion port, such as a metal housing of an automobile control unit. It relates to a manufacturing method.

Conventionally, burrs generated on the mold dividing surface of die-cast cast products were often removed manually, but manual deburring had a problem of deterioration in production efficiency. Therefore, in order to supplement the deburring by hand, a technique of deburring by a robot or a technique of deburring by machining has been proposed.

For example, as a deburring method using a trimming press die, claim 1 of Patent Document 1 states, "When casting a cast product in which a molten metal is filled in a die cavity and a through hole is formed. A casting step of providing a burr extending from the inner peripheral surface of the through hole toward the axis of the through hole and a hot water pool extending from the extending end of the burr, and a trimming press for the cast product. It is placed on the lower mold of the mold, and the hot water pool portion is pressed in the penetrating direction of the through hole by a punch provided at a position facing the hot water pool portion on the upper mold of the trimming press mold. A method for removing burrs from through-holes in a cast product, which comprises removing the pool portion together with the burrs from the inner peripheral surface by performing a pressing step, is disclosed.

Japanese Unexamined Patent Publication No. 2004-330243

Burrs on the mold split surface of die-cast castings did not occur in the initial stage of use of the casting mold, but gradually occurred as a result of mold wear due to repeated use of the mold, and their size gradually increased. It will increase. Therefore, with a trimming die prepared in advance as in Patent Document 1, it is difficult to remove burrs that gradually change in shape as the casting die is repeatedly used. In addition, as a result of the gradually increasing burrs wearing the mold, the mold may become unusable with a relatively small number of uses.

For example, even if a gap (clearance) suitable for removing burrs of a predetermined length is provided between the trimming die and the cast product, if the gap is larger than the length of the burrs, burrs are removed. When trying to remove the burr, the burr falls in the gap and the burr cannot be removed, or if the gap is small compared to the length of the burr, the part where the burr is removed will be eaten and the dimensional accuracy will deteriorate. There was also a problem that the flatness of the cast product was deteriorated.

In addition, the burrs generated on the split surface of the mold locally compress the surface of the mold, which causes deformation and cracking of the surface of the mold, which has a problem of deteriorating the life of the mold.

Therefore, an object of the present invention is to provide a method for producing a metal molded body, which can not only suppress the generation of burrs on the mold dividing surface but also reliably remove burrs by shearing.

In order to solve the above problems, in the method for producing a metal molded body of the present invention, a molten metal is poured into a casting mold, and a plate thickness T is formed on a mold dividing surface excluding a gate into which the molten metal is poured on the side surface of the metal molded body. It is provided with a casting step of forming a plate-shaped portion with a mold and a shearing step of shearing the plate-shaped portion at a position of a distance L from the side surface of the metal molded body, and satisfies the relationship of L≤T / 5. did.

According to the method for producing a metal molded body of the present invention, there is provided a method for producing a metal molded body, which can not only suppress the generation of burrs on the mold dividing surface but also reliably remove burrs by shearing. be able to.

Front view of the cast product of Example 1 Cross-sectional view of the cast product of Example 1 Front view of the punch of the casting of Example 1. Punch sectional view of the cast product of Example 1. Shearing process diagram of the casting of Example 1 The figure after shearing of the casting of Example 1. Diagram of connector insertion of the cast product of Example 1 Experimental quality evaluation chart after shearing Flow chart of the casting process of the control unit main body of the second embodiment Cross section of the flow chart of the casting process of the control unit main body of the second embodiment Perspective view of the shearing die of the control unit of the second embodiment Punch diagram of shearing die of control unit of Example 2 Expanded perspective view of the electronic control device of the third embodiment

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

The method for producing the metal molded body according to the first embodiment of the present invention and the metal molded body produced by the method will be described with reference to FIGS. 1 to 8. In the following, as an example of the metal molded body, a cast product 1 die-cast using the aluminum die-cast material ADC12, which is an alloy of aluminum and silicon, will be illustrated. However, the material of the cast product 1 has elongation at room temperature. As long as it is 5% or less, it may be a material mainly composed of other metals such as iron and copper.

First, the initial configuration of the die-cast cast product 1 will be described with reference to FIGS. 1 and 2. FIG. 1 is a front view of the casting product 1, and FIG. 2 is a cross-sectional view of the casting product 1 in the XX plane.

As shown in FIG. 1, the cast product 1 is a substantially square-shaped three-dimensional object having a substantially quadrangular opening in the center, and is formed by pouring molten metal from a sprue 5 through a gate 6. Further, as shown in FIG. 2, the mold dividing surface S excluding the gate 6 into which the molten metal of the cast product 1 is poured has an outer plate-shaped portion 2 having a plate thickness To and a length Bo on the outer peripheral side. It has an inner plate-shaped portion 3 having a plate thickness Ti and a length Bi on the peripheral side. Further, burrs 4 generated during casting are attached to the tips of the outer plate-shaped portion 2 and the inner plate-shaped portion 3. In the following, regarding the outer plate-shaped portion 2 and the inner plate-shaped portion 3, the one before shearing is referred to as the outer plate-shaped portion 2a and the inner plate-shaped portion 3a, and the one after shearing is referred to as the outer plate-shaped portion 2b. The inner plate-shaped portion 3b and the portion removed by shearing are referred to as an outer plate-shaped portion 2c and an inner plate-shaped portion 3c.

Next, the schematic configuration of the punching device used for the shearing process of the casting 1 will be described with reference to FIGS. 3 and 4. FIG. 3 is a front view of the punch of the casting product 1, and FIG. 4 is a cross-sectional view of the punch of the casting product 1 in the YY plane.

As shown in these, the punching apparatus of this embodiment has an outer punch 7 for shearing the outer plate-shaped portion 2a of the casting product 1 and an inner punch 8 for shearing the inner plate-shaped portion 3a. It is placed above. As is clear from FIGS. 3 and 4, the outer punch 7 and the inner punch 8 basically have an inner peripheral shape or an outer peripheral shape along the outer circumference or the inner circumference of the casting product 1, but the casting product 1 and A gap (clearance L) described in detail in FIG. 8 is provided between them.

Further, the tip of the outer punch 7 is provided with an angle of about 45 ° in order to reliably shear the outer plate-shaped portion 2a, and the tip of the punch first contacts the upper surface of the outer plate-shaped portion 2a. As a result, bending stress is prevented from being applied to the outer plate-shaped portion 2. Further, by giving an angle to the tip of the outer punch 7, even if the outer plate-shaped portion 2a is deformed, it can be processed from the tip portion, so that shearing can be performed reliably. Further, as in the inner punch 8, if shearing is possible, the tip portion may be flattened.

Next, a shearing method using the punching device of this embodiment will be described with reference to FIG.

FIG. 5A is the same as that of FIG. 4, and shows a state in which the outer punch 7 and the inner punch 8 are arranged above the outer plate-shaped portion 2a and the inner plate-shaped portion 3a before shearing. .. When the punching device is driven and both punches are lowered, the outer plate-shaped portion 2a and the inner plate-shaped portion 3a are sheared, and the outer plate-shaped portion 2c and the inner plate-shaped portion 3c (not shown) are removed. As a result, an outer plate-shaped portion 2b and an inner plate-shaped portion 3b having a length L, respectively, as shown in FIG. 5B are formed. Here, since the sheared surfaces of the outer plate-shaped portion 2b and the inner plate-shaped portion 3b are sheared by the outer punch 7 and the inner punch 8, both sheared surfaces are in a flat state with high surface accuracy. There is.

FIG. 6 shows the cast product 1 after shearing. As shown here, in the cast product 1 after shearing, the distance between the end faces of the outer plate-shaped portion 2b is Do, and the distance between the end faces of the inner plate-shaped portion 3b is Di. Since these end faces are flat surfaces where the outer punch 7 and the inner punch 8 are sheared, the outer dimension Do, the inner shape dimension Di, and the surface accuracy of the end face of the casting 1 are the dimensions of the outer punch 7 and the inner punch 8. It will be a high-precision one that reflects the accuracy.

Next, the insertion of the connector into the opening of the casting 1 will be described with reference to FIG. 7. As shown in FIG. 6, the cast product 1 after shearing is provided with an opening having an internal dimension Di in the center. When a male connector 15a having an external dimension of Di is inserted into this opening and connected to a terminal insertion hole 15b on the substrate, the male connector 15a is guided by a pair of inner plate-shaped portions 3b having an internal dimension Di to the substrate. It is inserted into the upper terminal insertion hole 15b. As described above, the internal dimension Di of the opening is of high dimensional accuracy by shearing, and the flatness of the end face of the inner plate-shaped portion 3b is also high, so that the male connector 15a is a terminal on the substrate. It can be appropriately guided to the insertion hole 15b, and the assembly accuracy can be improved. Further, since the flat end surface of the inner plate-shaped portion 3b and the side surface of the male connector 15a are in uniform contact over the entire circumference, the effect of improving the airtightness between the two can be obtained.
<Optimal value of clearance L>
Here, the optimum distance of the clearance L between the casting 1 and the punch will be described based on the evaluation of the shear plane by the experimental type.

When the casting 1 is sheared through the process illustrated in FIG. 5, if the relationship between the plate thickness T of the plate-shaped portion and the clearance L is inappropriate, the side surface of the casting 1 is eaten (such as gouging). , Gnawing (scratches, etc.), burrs, and other defects may occur.

In the quality evaluation diagram of FIG. 8, when the clearance L is changed in 5 steps in the range of 0 to 0.5 mm and the plate thickness T is changed in 5 steps in the range of 0.5 to 2.5 mm, each It is an evaluation figure which summarized the shear quality under the condition. This evaluation diagram shows, for example, that if the clearance L is 0 mm, galling occurs regardless of the plate thickness T, and if the clearance L is 0.5 mm, burrs occur regardless of the plate thickness T. Has been done. The evaluation chart also shows that good shear quality was obtained under the conditions of the OK range indicated by the diagonal lines. Therefore, at least the following conclusions can be read from FIG.
-Conclusion 1: Good shear quality could be obtained when the plate thickness T of the plate-shaped portion was in the range of 0.5 to 2.0.
-Conclusion 2: When the plate thickness T is 0.5 mm, good shear quality can be obtained when the clearance L is in the range of 0.05 to 0.10 mm (10 to 20% of the plate thickness T). Is.
-Conclusion 3: When the plate thickness T is 1.0 mm, good shear quality can be obtained when the clearance L is in the range of 0.05 to 0.10 mm (5 to 10% of the plate thickness T). Is.
-Conclusion 4: When the plate thickness T is 2.0 mm, good shear quality can be obtained when the clearance L is 0.05 to 0.2 mm (2.5 to 10% of the plate thickness T). Is the range of.
-Conclusion 5: If the plate thickness T exceeds 2.0 mm, eating may occur.

If the shape of the cast product 1 is different, a conclusion different from the above may be drawn. Therefore, it is desirable to obtain the relationship between the plate thickness T and the clearance L each time by an experimental type, but from the experimental results of FIG. From the derived conclusions 3 and 4, it can be inferred that good shear quality is obtained when the clearance L is 10% or less of the plate thickness T (that is, when L ≦ T / 10). Can be done. Further, from conclusion 2, if the plate thickness T is thin, good shear quality can be obtained when the clearance L is 20% or less of the plate thickness T (that is, when L ≦ T / 5). Can be inferred.

In FIG. 8, when the plate thickness T is 2.5 mm or more, eating occurs, but depending on the shape condition of the cast product, good shear quality can be obtained even if the plate thickness T is 3.0 mm. It is expected that it can be done. Therefore, the above-mentioned conclusion 1 may be extended to the plate thickness T in which good shear quality can be obtained in the range of 0.5 to 3.0.

According to the method for manufacturing the metal molded body of the present embodiment described above, the outer peripheral shape and the inner peripheral shape of the metal molded body (cast product 1) can be finished with high accuracy by using the punching device. When inserting the connector into the opening of 1, the connector can be accurately guided to the desired position, which not only improves the assembly accuracy, but also improves the airtightness of the contact surface between the casting 1 and the connector, and goes inside. It is possible to prevent the intrusion of water.

Next, the control unit main body 16 manufactured by the method for manufacturing the metal molded body according to the second embodiment of the present invention will be described with reference to FIGS. 9 to 14. It should be noted that the common points with the first embodiment will be omitted.

First, the casting process of the control unit main body 16 of this embodiment will be described with reference to FIGS. 9 and 10. The control unit main body 16 is a die-cast cast product provided with a connector insertion port 16a as corresponding to the opening of the cast product 1 of the first embodiment.

Figure 9 shows a molten metal stream F ₁ in a casting mold for the control unit body 16. As shown by the arrow, the molten metal poured into the sprue 18 under casting pressure flows into the space having the same shape as the control unit main body 16 through the runner 17 and the gate having an opening thickness of about 1.2 mm. At this time, the air in the space is released from the overflow 19 having an opening thickness of about 1.5 mm provided in the direction opposite to the gate, so that the entire space having the same shape as the control unit main body 16 can be filled with molten metal. it can. Similar to the cast product 1 shown in FIG. 2, an outer plate-shaped portion 2a is formed on the outer peripheral portion of the mold dividing surface S of the control unit main body 16 cast in this manner, and the connector insertion port 16a An inner plate-shaped portion 3a is formed on the inner peripheral portion.

FIG. 10 is an enlarged cross-sectional view of the vicinity of the outer plate-shaped portion 2a on the ZZ plane shown in FIG. As shown here, the high-pressure molten metal flow F ₁ flowing through a relatively large space changes to a low-pressure molten metal flow F ₂ due to a decrease in cross section when flowing into a narrow space having a plate thickness To. .. Therefore, the amount of molten metal flowing out from the tip of the outer plate-shaped portion 2a to the mold dividing surface S is reduced, the wear of the casting mold is suppressed, and the generation of burrs 4 is also suppressed. By the same action, the generation of burrs 4 on the inner plate-shaped portion 3a side is also suppressed. When the generation of burrs 4 at the tips of the outer plate-shaped portion 2a and the inner plate-shaped portion 3a is suppressed in this way, the progress of deterioration of the casting mold due to the burrs 4 due to repeated use of the casting mold is also suppressed. Therefore, the life of the casting die can be extended.

Next, the shearing process of the control unit main body 16 will be described with reference to FIG. From the control unit main body 16 manufactured by the casting process of FIG. 9, the solidified metal lumps in each of the sprue 18, runner 17, and overflow 19 spaces are removed in advance before shearing by the punching device. However, these metal ingots may be sheared at the same time during the shearing process by the punching device.

The outer plate-shaped portion 2a on the outer circumference of the control unit main body 16 and the inner plate-shaped portion 3a on the inner circumference of the connector insertion port 16a are sheared by a shearing die 22 provided with an outer punch 7 and an inner punch 8. To do.

As shown in FIGS. 9 and 10, in the die casting process, the outer plate-shaped portion 2a is formed in a substantially symmetrical shape on the outer circumference of the control unit main body 16 over the entire circumference, and the connector insertion port is also formed. On the inner circumference of 16a, an inner plate-shaped portion 3a is formed in a substantially symmetrical shape over the entire circumference. Therefore, in the shearing step, the outer punch 7 of the shearing die 22 simultaneously shears the outer plate-shaped portion 2a over the entire circumference, and the inner punch 8 of the shearing die 22 presses the inner plate-shaped portion 3a. By simultaneously shearing over the entire circumference, both plate-shaped portions formed on the mold dividing surface S of the control unit main body 16 can be sheared in a well-balanced and symmetrical manner, so that the flatness of the control unit main body 16 after shearing varies. Can be reduced.

When the plate thickness T becomes thicker, the stress required for shearing the plate-shaped portion increases, which causes deterioration of the flatness of the control unit main body 16. Therefore, it is preferable that the plate thickness T is thin, and a particularly suitable plate thickness T is used. The range of is T = 0.5 to 1.5 mm.

Next, the shearing die of this embodiment will be described in more detail based on FIG. The control unit main body 16 which is a metal molded body in this embodiment is set in a shearing die 22 and is pressed by a die stripper 33, and then the outer punch 7 and the inner punch 8 are lowered to form both plates. The part is sheared. At this time, the relationship between the clearance L and the plate thickness T between the outer punch 7 or the inner punch 8 and the control unit main body 16 has the relationship shown in FIG. 8 as in the first embodiment, and L ≦ T / 5, especially L ≦. A good shear surface can be obtained at T / 10.

In the shearing die 22 shown in FIG. 11, the spring 25 has an important role of applying a load for pressing the die stripper 33, and the load of the spring 25 causes the work (cotrol unit body 16) to rattle. Suppress. Therefore, in order to maintain an appropriate clearance L, it is desirable to apply a spring load of 10% or more of the shear load.

Next, the details of the shearing process of the control unit main body 16 will be described with reference to FIG.
As described above, the outer punch 7 and the inner punch 8 are used for shearing the plate-shaped portion formed on the mold dividing surface S of the control unit main body 16. When the shearing die 22 is pressed, the outer punch 7 moves downward and contacts the outer plate-shaped portion 2a, and the inner punch 8 moves downward and contacts the inner plate-shaped portion 3a. When the shearing die 22 is further pressurized, the outer punch 7 shears and removes the outer plate-shaped portion 2c from the outer plate-shaped portion 2a, and the inner punch 8 shears and removes the inner plate-shaped portion 3c from the inner plate-shaped portion 3a. The outer plate-shaped portion 2b and the inner plate-shaped portion 3b having a predetermined length L are formed on the mold dividing surface S of the control unit main body 16.

According to the method for manufacturing the metal molded body of the present embodiment described above, the outer peripheral shape and the inner peripheral shape of the metal molded body (control unit main body 16) can be finished with high accuracy as in the first embodiment. When inserting the connector into the connector insertion port 16a, not only can the connector be accurately guided to the desired position, but also the airtightness of the contact surface between the control unit body 16 and the connector can be improved, and water can enter the inside. Etc. can be prevented.

Next, the metal molded body according to the third embodiment of the present invention will be described with reference to the developed view of FIG. It should be noted that the common points with the above-described embodiment will be omitted.

The metal molded body in this embodiment is a metal housing (die casting case 37) of an electronic control unit (ECU, Electronic Control Unit) mounted in an engine room of an automobile. The electronic control device mounted in the engine room is required to be waterproof in order to protect the electronic components mounted on the substrate. Therefore, the electronic control device has a structure in which the waterproof sealability between the case and the cover constituting the housing in which the circuit board is hermetically housed is improved.

The die-cast case 37 of this embodiment is a cast product of an aluminum die-cast material ADC12 equivalent as in the above-described embodiment, and the three

connectors

38a, 38b, and 38c inserted into the electronic control device are shown in FIG. As shown in the above, the connector is fixed to the connector insertion port 37a via the sealing material 46. Further, the printed wiring board 40 is assembled and fixed by screws 43 after applying the sealing material 39 so as to be sandwiched between the cover 41 which is a metal component and the die casting case 37.

The heat-dissipating adhesive 42 conducts the heat generated by the electronic components to the surface-accurate pedestal of the die-cast case 37 via the printed wiring board 40. The thinner the heat-dissipating adhesive 42, the easier it is to conduct heat generation. When the die casting case 37 is warped and deformed, the clearance with the printed wiring board 40 is widened, so that the heat dissipation performance is deteriorated. Therefore, in order to maintain the heat dissipation performance, it is effective to suppress the deformation of the die casting case 37. Further, the heat-generating electronic components that require heat dissipation are arranged under the heat dissipation fins 45.

In the casting process of the die casting case 37, the outer plate-shaped portion 2 is cast into a substantially symmetrical shape on the mold dividing surface S of the outer peripheral portion of the die casting case 37, and the plate-shaped protrusions are simultaneously sheared by a shearing process after the casting process. As a result, the plate-shaped protrusion shearing portion 44 is formed, and in the shearing process, the bottom surface of the die casting case 37 is received by the lower plate of the cutting die, and during processing, the punch of the cutting die is used. By applying uniform machining stress along the outer peripheral portion, the flat surface is straightened and the flatness is improved.

Further, the plate-shaped protrusion shearing portion 44 is located on the outer peripheral portion of the die-cast case 37, and the sheared plate-shaped protrusion shearing portion 44 has a flat surface and the dimensional accuracy is improved, so that the cover 41 There is an effect of improving the airtightness in the fitting with.

1 Casting product 2 Outer plate-shaped part 2a Outer plate-shaped part before shearing 2b Outer plate-shaped part after shearing 2c Outer plate-shaped part 3 Sheared outer plate-shaped part 3a Inner plate-shaped part before shearing 3b Inner side after shearing Plate-shaped part 3c Sheared inner plate-shaped part 4 Burr 5 Gate 6 Gate 7 Outer punch 8 Inner punch 15a Male connector 15b Terminal insertion hole on board 16 Control unit body 16a Connector insertion port 17 Runner 18 Gate 19 Overflow 22 Shearing die Mold 25 Spring 33 Mold stripper 35 Evaluation site 37 Die casting case 37a

Connector insertion port

38a, 38b, 38c Connector 39 Sealing material 40 Printed wiring board 41 Cover 42 Heat dissipation adhesive 43 Screw 44 Plate-shaped protrusion shear 45 Heat dissipation fin 46 Sealing material

Claims

It is a method of manufacturing a metal molded body.
A casting process in which molten metal is poured into a casting mold, and a plate-shaped portion having a plate thickness T is formed by the mold on the mold dividing surface excluding the gate into which the molten metal is poured on the side surface of the metal molded body.
A shearing step of shearing the plate-shaped portion at a distance L from the side surface of the metal molded body, and
With
A method for producing a metal molded body, which satisfies the relationship of L≤T / 5.
In the method for producing a metal molded body according to claim 1,
A method for producing a metal molded body, which satisfies the relationship of L≤T / 10.
In the method for producing a metal molded product according to claim 1 or 2.
A method for producing a metal molded body, wherein the plate thickness T is 0.5 to 3.0 mm.
In the method for producing a metal molded product according to claim 1 or 2.
A method for producing a metal molded body, wherein the molten metal is a die-cast material having an elongation of 5% or less at room temperature.
In the method for producing a metal molded product according to claim 1 or 2.
A method for manufacturing a metal molded body, wherein the plate-shaped portion is formed on an inner surface of a connector insertion port into which a connector is inserted.
In the method for producing a metal molded product according to claim 1 or 2.
In the casting step, molten metal is poured into the casting die from a gate having an opening thickness of about 1.2 mm, and an overflow having an opening thickness of about 1.5 mm provided in the direction opposite to the gate causes the inside of the casting die. Let the air escape,
A method for producing a metal molded body, which comprises shearing a metal block formed by the gate and the overflow in the shearing step at the same time as the plate-shaped portion.
In the method for producing a metal molded product according to claim 1 or 2.
In the casting step, the plate-shaped portion is formed in a substantially symmetrical shape on the mold dividing surface of the metal molded body.
In the shearing step, a method for producing a metal molded body, which comprises simultaneously shearing the plate-shaped portion over the entire circumference.
It is a metal molded body manufactured by pouring molten metal into a casting mold.
A plate-shaped portion having a plate thickness T and a length L is provided on the mold dividing surface on the side surface.
A metal molded body characterized in that the relationship of L ≦ T / 5 is satisfied.
In the metal molded body according to claim 8,
A metal molded body characterized in that the relationship of L ≦ T / 10 is satisfied.
In the metal molded product according to claim 8 or 9.
The plate thickness T is a metal molded body having a thickness of 0.5 to 3.0 mm.
In the metal molded product according to claim 8 or 9.
The molten metal is a metal molded body characterized by being a die-cast material having an elongation of 5% or less at room temperature.
In the metal molded product according to claim 8 or 9.
The plate-shaped portion is a metal molded body formed on the inner surface of a connector insertion port into which a connector is inserted.
An electronic control device using the metal molded body according to claim 12 as a housing.
An electronic control device characterized in that it is connected to a first connector inserted into the connector insertion port and a terminal insertion hole on a substrate in the housing.