KR102251240B1 - manufacturing method of side sill and side sill manufactured by the same - Google Patents

Abstract

The present invention, as a method of manufacturing a side seal, material preparation step; A processing step of forming a fastening hole in the frame prepared in the material preparation step; A fastening step of mounting a bracket on a portion of the material where the fastening hole is formed; And a welding step of joining the nut pipe to the bracket.

Description

Manufacturing method of side sill and side sill manufactured by this method {manufacturing method of side sill and side sill manufactured by the same}

The present invention relates to a method of manufacturing a side seal mounted in an electric vehicle while supporting a battery housing so that a battery housing protecting a battery cell can be provided in an electric vehicle, and a side seal manufactured by the method.

Recently, various eco-friendly electric vehicles that consume less energy and can reduce environmental pollution have been developed.

In the case of an electric vehicle, unlike conventional vehicles, a battery with a large capacity is required to secure a longer driving distance and driving power because it is operated by receiving power from a battery. Accordingly, a large-capacity battery module formed by connecting a plurality of unit battery cells to each other is mounted in the electric vehicle.

Such a battery module is generally provided in an electric vehicle in a state of being embedded in a battery housing made of a metal material because it is required to maintain a stable state from vibration of the vehicle or an external shock applied to the vehicle.

In other words, the battery module is built in a battery housing with a rigid metal material to be protected from external vibrations and shocks, and because it has a considerable weight, it is the lower side of the electric vehicle in terms of maintaining the balance of the electric vehicle. It is provided in the center.

In particular, in the case of a high-end electric vehicle that requires a higher voltage, the number of unit battery cells increases in proportion to the required voltage, and the volume or weight of the housing increases accordingly. It can be said that it is very important to install it firmly in the vehicle's mounting space.

However, since the conventional battery housing for an electric vehicle has a configuration that is connected to the frame portion of the electric vehicle that divides the mounting space by a welding method, there is a disadvantage in that it is difficult to replace or repair the battery module. That is, it takes a lot of manpower and time to remove the battery housing in which the heavy-duty battery module is embedded from the frame portion of the electric vehicle, and thus, it is difficult and expensive to replace and repair the battery module.

In addition, since the battery housing in which the battery module is mounted is also very heavy, the frame portion of the electric vehicle is also required to have rigidity. In other words, the frame part of the electric vehicle is preferably made of a material with high rigidity in terms of firmly supporting the battery housing, but considering the energy efficiency of the electric vehicle, it must be made of a material that can be lightweight and possible. This is the situation that is being made.

Accordingly, the present applicant has proposed the present invention in order to solve the above problems, and as a related prior art document, there is a'electric vehicle battery mounting device' of Korean Patent Registration No. 10-1655482.

The present invention is to solve the above problems, and serves as a medium connecting the battery housing and the frame portion of the electric vehicle to each other, but is joined to the frame portion of the electric vehicle by a welding method and fastened to the battery housing by a bolting method. An object of the present invention is to provide a method of manufacturing a side seal and a side seal manufactured by this method.

In addition, an object of the present invention is to provide a method of manufacturing a side seal configured to stably support a battery housing having a high weight while being made of a lightweight material, and a side seal manufactured by the method.

The present invention, as a method of manufacturing a side seal, material preparation step; A processing step of forming a fastening hole in the frame prepared in the material preparation step; A fastening step of mounting a bracket to a portion of the frame in which the fastening hole is formed; And a welding step of joining the nut pipe to the bracket while inserting the nut pipe into the fastening hole.

In addition, in the material preparation step, a hollow metal frame having a predetermined length may be prepared.

In addition, in the processing step, a plurality of the fastening holes may be formed at a predetermined distance from each other along the longitudinal direction of the frame.

In addition, the bracket used in the fastening step may include a body formed in a shape surrounding the negative of the frame in which the fastening hole is formed and in contact with the upper and both sides of the frame; And a connecting piece extending from an end portion of the body in contact with both side surfaces of the frame and in contact with the battery housing or the frame portion of the electric vehicle.

In addition, in the welding step, one end and the other end in the longitudinal direction of the nut pipe exposed to the outside of the frame may be joined to the body of the bracket while the nut pipe is inserted into the fastening hole.

In addition, a test step of applying a torque or eddy current to the nut pipe to compare and analyze a preset torque value or current value; may further include.

In addition, the inspection step may be performed before the nut pipe is bonded to the bracket, or after bonded to the bracket.

In addition, in the fastening step, a clamping part for fixing the frame on which the bracket is placed; And a bolting unit that couples the bracket on the frame in a state disposed above the clamping unit.

In addition, the clamping unit may include a main body that rotates while fixing the frame so that both sides of the frame are disposed to face the bolting unit, and provides a space in which the frame can be placed; First fixing members disposed on both sides of the body in the width direction to press the connecting pieces of the brackets placed on the frame; A second fixing member disposed on one side of the first fixing member and pressing a portion of the frame on which the bracket is not disposed; And a driving unit connected to the main body to rotate the main body in one direction or the other direction.

In addition, the present invention, a hollow frame having a predetermined length; A plurality of fastening holes formed at predetermined intervals from each other along the longitudinal direction of the frame; A bracket mounted to correspond to a portion of the frame in which the fastening hole is formed, one end of which is connected to the frame of the vehicle, and the other end of the lengthwise direction of the bracket supporting the battery housing; And a nut pipe joined to the bracket while being inserted into the fastening hole.

The method of manufacturing a side seal according to the present invention can provide a side seal capable of stably supporting a battery housing in which a battery module is embedded in a mounting space of an electric vehicle.

In addition, the manufacturing method of the side seal according to the present invention provides a side seal in which the battery housing is indirectly connected to the frame portion of the electric vehicle, so that the battery housing is separated from the electric vehicle for replacement or maintenance of the battery module. Make your work easier.

In addition, in the method of manufacturing the side seal according to the present invention, a plurality of brackets connected to the battery housing or the frame portion of an electric vehicle are mounted on the frame in an automated manner, and a plurality of nut pipes connected to the battery housing are also automated. Since it has a configuration of welding in a manner, it is possible to increase the productivity of the product.

In addition, the manufacturing method of the side seal according to the present invention uses a clamping device capable of changing the bolting position or welding position of the frame while preventing the frame from moving in mounting brackets or nut pipes on the frame. Therefore, it is possible to reduce the defect rate of the product and improve durability by maintaining the fastening accuracy of the bracket by the bolting method and the welding accuracy of the nut pipe by the welding method.

1 is a flow chart of a method of manufacturing a side seal according to an embodiment of the present invention.
2 is an exploded perspective view of a side seal manufactured by a method for manufacturing a side seal according to an embodiment of the present invention.
3 is a perspective view of the side seal shown in FIG. 2.
Figure 4 is a perspective view of the bracket shown in Figure 2;
5 is a perspective view of a nut pipe according to an embodiment of the present invention.
6 is a plan view schematically showing the configuration of a clamping unit of a fastening device used in a welding step according to an embodiment of the present invention.
Figure 7 is a side view showing the configuration of the bolting unit of the fastening device used in the welding step according to an embodiment of the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only the present embodiments are intended to complete the disclosure of the present invention, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims.

Hereinafter, a method of manufacturing a side seal and a side seal manufactured by the method according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 7. In describing the present invention, detailed descriptions of related known functions or configurations are omitted so as not to obscure the subject matter of the invention.

1 is a flowchart of a method for manufacturing a side seal according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a side seal manufactured by a method for manufacturing a side seal according to an embodiment of the present invention, and FIG. A perspective view of the side seal shown in Figure 2, Figure 4 is a perspective view of the bracket shown in Figure 2, Figure 5 is a perspective view of a nut pipe according to an embodiment of the present invention, Figure 6 is an embodiment of the present invention A plan view schematically showing a configuration of a clamping unit of a fastening device used in a welding step according to an example, and FIG. 7 is a side view showing a configuration of a bolting unit of a fastening device used in a welding step according to an embodiment of the present invention.

As shown in Figure 1, the manufacturing method of the side seal according to an embodiment of the present invention, the material preparation step (S100); A processing step (S200) of forming a fastening hole (h) in the frame (f) prepared in the material preparation step (S100); A fastening step (S300) of mounting the bracket 30 to the portion of the frame (f) in which the fastening hole (h) is formed in the processing step (S200); And a welding step (S400) of joining the nut pipe (P) to the bracket 30 mounted on the frame (f) in the fastening step (S300).

First, the material preparation step S100 may be referred to as a step of preparing a hollow frame f having a predetermined length, as shown in FIG. 2.

This frame (f) may be pulled out from a known extrusion molding apparatus, and in an embodiment of the present invention, it may be extruded into a shape having a square cross section.

In addition, the frame (f) drawn out from the extrusion molding apparatus is introduced into a heat treatment apparatus to improve mechanical properties, workability, and physical properties.

In addition, the frame f that has passed through the heat treatment device may be introduced into a cutting device and cut into a predetermined length. Then, a frame f having the shape as shown in FIG. 2 may be prepared in the material preparation step S100.

For reference, since the frame f is mounted on a vehicle body frame of an electric vehicle that divides the battery mounting space, it may have various shapes and lengths corresponding to the shape of the mounting space formed in the electric vehicle. In addition, it is preferable to be made of aluminum, which is a metal material capable of stably supporting the battery housing without burdening the electric vehicle with weight. Accordingly, the frame f described in the embodiment of the present invention may be made of an aluminum material.

The processing step (S200), as described above, may be referred to as a step of forming a fastening hole (h) in the frame (f) prepared in the material preparation step (S100), this fastening hole (h) A plurality of frames may be formed at a predetermined distance from each other along the longitudinal direction of the frame (f).

A machining center may be used to form a fastening hole (h) in the frame (f), and the configuration of forming a hole on one member using such a known device is easily implemented by those skilled in the art. Since the configuration is possible, a detailed description thereof will be omitted in the specification of the present invention.

The fastening step (S300) may be referred to as a step of mounting a medium connecting the frame (f) with the frame portion of the electric vehicle to the frame (f) while allowing the battery housing to be supported on the frame (f). In addition, this medium may be implemented with a bracket 30 having a shape as shown in FIG. 4.

As shown in FIG. 4, the bracket 30 may be provided in a longitudinal portion of the frame f in which the fastening hole h is formed, and the frame f A body 31 formed in a form surrounding the negative of the frame (f) and in contact with the upper and both sides of the frame (f), respectively; And a connecting piece 32 extending from an end of the body 31 in contact with both side surfaces of the frame f and contacting the battery housing or the frame portion of the electric vehicle.

The body 31 may have a'C' shape, and may have a hole 31a communicating with a fastening hole h formed in the frame f in the processing step S200. That is, a hole 31a is formed in a portion of the body 31 that is in contact with the side surface of the frame f so as to communicate with the fastening hole h.

One connecting piece 32 of the pair of connecting pieces 32 extending from the body 31 is in contact with the battery housing to support the battery housing, and the other connecting piece 32 is connected to the frame portion of the electric vehicle. I can.

In addition, the body 31 and the connecting piece 32 are formed with a plurality of fastening holes into which a known fastening means such as a bolt can be inserted, and the bracket 30 is framed by a fastening means inserted into the fastening hole. ) Can be firmly mounted.

Here, before the bracket 30 and the frame f are coupled to each other by a fastening means, the bracket 30 may be placed on the frame f by an operator, and at this time, the body 31 of the bracket 30 The hole 31a formed in) and the fastening hole h formed in the frame f may correspond to each other.

For reference, the bracket 30 may be made of a metal material different from that of the frame f. That is, the bracket 30 is preferably made of a rigid metal material, unlike the frame f made of aluminum. This is because, while safely supporting the heavy battery housing, it is not thermally deformed by the welding heat generated in the welding step (S400) to be described later.

Meanwhile, in the fastening step (S300), the fastening device 100 as shown in FIG. 6 may be used.

The fastening device 100, as shown in FIGS. 6 and 7, a clamping part 110 for fixing the frame f on which the bracket 30 is placed; And a bolting part 130 that couples the bracket 30 on the frame f in a state disposed above the clamping part 110.

The clamping unit 110 may be regarded as a component that fixes the frame f on which the bracket 30 is placed and also fixes the bracket 30 placed on the frame f.

That is, the clamping part 110 can be said to be a component that prevents the flow of the bracket 30 and the flow of the frame f, respectively, when the bracket 30 and the frame f are bolted to each other by a fastening means. have.

Thus, the clamping unit 110, as shown in Figure 6, the main body 111 providing a space in which the frame (f) can be placed; A first fixing member 112 disposed on both sides of the body 111 in the width direction to press the connecting piece 32 of the bracket 30 placed on the frame f; A second fixing member 113 disposed on one side of the first fixing member 112 and pressing a portion of the frame f on which the bracket 30 is not disposed; And a driving unit 114 connected to the main body 111 to rotate the main body 111 in one direction or the other direction.

For reference, in order not to complicate the illustrated clamping unit 110 in FIG. 6, the frame f is shown separately from the clamping unit 110.

The first fixing member 112 and the second fixing member 113 may be respectively connected to a rod that is raised or lowered by receiving power from a known actuator.

For example, when the rod is raised, the first fixing member 112 may rotate toward the central portion of the main body 111 to press the connecting piece 32 of the bracket 30 placed on the frame f. In addition, the second fixing member 113 may also be rotated toward the central portion of the main body 111 to press the lengthwise portion of the frame f on which the bracket 30 is not placed.

In the above state, since the bracket 30 is pressed by the first fixing member 112 and firmly adheres to the frame f, the flow can be prevented during the bolting process by the bolting unit 130. have. In addition, since the frame f is pressed by the second fixing member 113 and is in close contact with the main body 111, flow can be prevented during the bolting process by the bolting unit 130.

The driving unit 114 may be disposed on one side of the body 111 in the longitudinal direction, and may be implemented as a driving motor.

The main body 111 may be rotated at a predetermined angle by driving of the driving unit 114, and accordingly, the frame f mounted on the main body 111 may also be rotated at a predetermined angle.

As above, the reason why the main body 111 is rotated by the driving unit 114 is to arrange the portion of the frame f in contact with the body 31 of the bracket 30 to face the bolting unit 130 to be described later. It is for sake. That is, the bolting part 130 disposed on the upper part of the clamping part 110 is moved vertically downward so that fastening means such as screws can be easily inserted into the body 30 and the frame f of the bracket 30. It is to do.

For example, when the body 31 of the bracket 30 in contact with the upper surface of the frame f is disposed to face the bolting part 130, it is not necessary to drive the driving part 114. That is, as shown in FIG. 6, since the upper surface of the frame f is disposed to face the bolting part 130, the main body 111 does not need to be rotated. Accordingly, the bolting unit 130 is moved vertically downward and inserts a fastening means such as a screw into the portion of the body 31 that is in contact with the upper surface of the frame f, so that the body 31 is placed on the upper surface of the frame f. Can be fixed.

However, when the body 31 of the bracket 30 in contact with the side of the frame f is disposed to face the bolting part 130, the drive part 114 is driven so that the body 111 is in one direction. Alternatively, it can be rotated at a predetermined angle in the other direction. For example, when the main body 111 is rotated in one direction or the other direction at an angle of about 45 degrees by the driving unit 114, the side surface of the frame f may be disposed to face the bolting unit 130. Then, the bolting unit 130 is moved vertically downward and inserts a fastening means such as a screw into the body 31 in contact with the side of the frame (f) to fix the body 31 on the side of the frame (f). have.

For reference, the bolting part 130 may be disposed above the clamping part 110 while being connected to a known robot arm, and a plurality of brackets ( A fastening means such as a screw can be inserted into 30).

In the welding step (S400), one end and the other end in the longitudinal direction are inserted into the body of the bracket 30 in a state in which the nut pipe 40 shown in FIG. 5 is inserted into the fastening hole h formed in the frame f. It can be said that it is a step of bonding with (31).

The nut pipe 40 may be referred to as a component coupled with a fastening means such as a bolt via a battery housing. That is, it can be said to be a component coupled with known fastening means such as bolts used to couple the battery housing on the frame (f).

The nut pipe 40 includes an insertion part 41 sequentially inserted into a hole 31a formed in the body 31 of the bracket 30 and a fastening hole h formed in the frame f; And a head 42 provided at one end in the longitudinal direction of the insertion part 41 while having a diameter larger than the diameter of the insertion part 41.

The nut pipe 40 has a length longer than the length of the frame f in the width direction. In addition, the head 42 of the nut pipe 40 has a diameter that cannot be inserted into the hole 31a formed in the body 31 of the bracket 30 and the fastening hole h of the frame f. .

Therefore, when the nut pipe 41 is sequentially inserted into the hole 31a formed in the body 31 and the fastening hole h formed in the frame f, the head 42 disposed at one end in the longitudinal direction is It is exposed from one side of the frame f, and the end of the insertion part 41 disposed at the other end in the longitudinal direction is exposed from the other side of the frame f. For reference, the process of inserting the nut pipe 41 into the frame f may be performed by an operator.

In other words, in the welding step (S400), the longitudinal end portion of the nut pipe 41 exposed from one side and the other side of the frame f is the body 31 of the bracket 30, that is, the frame f. It can be said to be a step of joining the body 31 of the bracket 30 in contact with one side and the other side of the unit by welding. That is, the circumferential surface of the head 42 and the body 31 exposed from one side of the frame f are welded to each other, and the circumferential surface of the insertion part 42 exposed from the other side of the frame f It may be referred to as a step of welding the and the body 31 to each other.

As above, when the longitudinal end portion of the nut pipe 40 is welded to the bracket 30 and joined, the nut pipe 41 is inserted into the bracket 30 while being inserted into the fastening hole h of the frame f. It can be firmly fixed.

For reference, it can be said that it is important to prevent the flow of the frame f when welding the nut pipe 40 to the bracket 30 mounted on the frame f. Therefore, in the welding step (S400), the clamping part 110 of the fastening device 100 described in the fastening step (S300) is used to prevent the flow of the frame (f).

In particular, since the part where the nut pipe 40 and the bracket 30 are welded to each other is the side of the frame f, a clamping part that fixes the frame f so that the frame f can be rotated from the side that places the welded part facing the welding machine. It is preferable to use (110).

In addition, a known welding device such as an automatic welding machine may be used as a means for welding the nut pipe 40 and the bracket 30, and this welding device is also transported along the longitudinal direction of the frame f by a robot arm. The pipe 40 and the frame f can be welded.

On the other hand, the manufacturing method of the side seal according to an embodiment of the present invention, the test step (S500) of applying a torque or eddy current to the nut pipe 40 to compare and analyze a preset torque value or current value; further includes can do.

In the inspection step (S500), it is determined whether the processing precision of the hole formed in the nut pipe 40 is processed within a range including an allowable error, or whether the threaded portion formed in the hole is deformed or damaged, whether there is a foreign substance, etc. Thus, it can be said to be the step of selecting good and defective products.

The inspection step (S500) is carried out before the nut pipe 40 is joined to the body 31 of the bracket 30, or the nut pipe 40 is the body of the bracket 30 ( 31) can be carried out after bonding.

That is, the inspection step (S500) may be performed before the welding step (S400) or after the welding step (S400), and both before and after the welding step (S400) is a nut pipe It can be said that it is desirable in terms of accurately selecting good and defective products in (40).

When the inspection step (S500) is carried out before the welding step (S400), the operator performs a first visual inspection of the nut pipe 40 to be individually inserted into the fastening hole (h) of the frame (f), and , Secondly, an eddy current or torque may be applied to the hole formed in the nut pipe 40 while the nut pipe 40 is inserted into the fastening hole h.

For example, when the inspection step (S500) is performed before the welding step (S400), the operator determines that it is defective among a plurality of nut pipes 40 inserted into the fastening holes (h) of the frame (f). The old nut pipe 40 may be separated from the fastening hole h and disposed of, and the new nut pipe 40 may be reinserted into the fastening hole h of the frame f.

In addition, even when the inspection step S500 is performed after the welding step S400, an eddy current or torque may be applied to the hole of the nut pipe 40. At this time, the nut pipe 40 may be inserted into the fastening hole h of the frame f and bonded to the body 31 of the bracket 30 by a welding method.

The reason why the inspection step (S500) is carried out even after the welding step (S500) is that the nut pipe 40 is joined to the body 31 of the bracket 30 by welding through a hole in the nut pipe 40. This is to discover these phenomena because foreign matter may enter, and the shape of the hole, the position of the hole, and the threaded portion formed in the hole may be deformed by welding heat.

Therefore, even after the welding step (S400), the inspection step (S500) may be performed to determine whether or not there is an abnormality in the nut pipe 40, and accordingly, the product may be selected as good or defective products.

In summary, the inspection step (S500) performed before the welding step (S400) is an inspection for selecting the nut pipe 40 itself before being joined to the body 31 of the bracket 30 as good or defective products. , The inspection step (S500) carried out after the welding step (S400) may be referred to as an inspection to select the nut pipe 40 joined by the body 31 of the bracket 30 and the welding method as good or defective products. have.

For reference, in the inspection step (S500), a known current application device may be used as a device for applying eddy current to the holes of the plurality of nut pipes 40 inserted into the fastening holes h of the frame f. The current application device may include a current generating member in the form of an insertion rod that is inserted into the holes of the plurality of nut pipes 40 and simultaneously applies eddy current, and a sensing unit that measures a current value applied through the holes of the nut pipe 40. .

Likewise, in the inspection step (S500), a known multi-type nut that applies torque by inserting/fastening members such as bolts into the holes of the plurality of nut pipes 40 inserted into the fastening holes h of the frame f. A runner may be used, and the multi-type nutrunner is inserted into a plurality of nut pipes 40, respectively, and a fastening means for fastening a member such as a bolt to a hole of the nut pipe 40, and a torque applied to the hole is measured. A sensing unit may be provided.

In addition, the order of applying eddy current or torque to the hole of the nut pipe 40 in the inspection step (S500) may be changed, and only one of the two methods may be used, but whether or not the nut pipe 40 is abnormal. It is desirable to use both methods in order to accurately grasp.

For reference, the defect rate of the nut pipe 40 generated in the inspection step S500 performed after the welding step S400 is, of course, the nut pipe generated in the inspection step S500 performed before the welding step S100. It can be said that it is significantly lower than the defective rate of (400). However, since the nut pipe 40 determined as a defective product in the inspection step S500 performed after the welding step (S400) is in a state of being joined to the body 31 of the bracket 30, a plurality of nut pipes 40 There is a disadvantage that the frame (F) on which) is welded must be disposed of. Therefore, it is very preferable that the inspection step (S500) is performed before the welding step (S400) even in order to reduce the above disadvantages.

And, the frame (f) selected as a good product in the inspection step (S500) may be marked with the lot number of the product, the logo of the manufacturer, etc. in the rudder process, and the frame (f) that has undergone this rudder process is the final product side seal. Can be shipped as.

Although the specific embodiments according to the present invention have been described so far, various modifications can be made without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be defined by being limited to the described embodiments, and should be defined not only by the claims to be described later, but also by the claims and their equivalents.

S100: material preparation step S200: cutting step
S300: fastening step S400: welding step
S500: Inspection step f: Frame
30: bracket 31: body
31a: hole 32: connecting piece
40: nut pipe 41: insert
42: head 100: fastening device
110: clamping part 111: main body
112: the first fixed government goods 113: the second fixed government goods
114: drive unit

Claims (10)

As a method of manufacturing a side seal,
Material preparation stage;
A processing step of forming a fastening hole in the frame prepared in the material preparation step;
A fastening step of mounting a bracket to a portion of the frame in which the fastening hole is formed; And
And a welding step of joining the nut pipe to the bracket while inserting the nut pipe into the fastening hole.
In the material preparation step,
Prepare a hollow metal frame having a predetermined length,
In the processing step,
A plurality of the fastening holes are formed at a predetermined distance from each other along the longitudinal direction of the frame,
The bracket used in the fastening step,
A body formed in a shape surrounding the negative of the frame in which the fastening hole is formed, and contacting the upper surface and both side surfaces of the frame, respectively; And
Including; connecting pieces extending from the ends of the body in contact with both side surfaces of the frame and in contact with the battery housing or the frame portion of the electric vehicle,
In the fastening step,
A clamping part fixing the frame on which the bracket is placed; And
A fastening device comprising a; bolting portion for coupling the bracket on the frame in a state disposed above the clamping portion is used,
The clamping part includes rotating while fixing the frame so that both sides of the frame may be disposed to face the bolting part,
A main body providing a space in which the frame can be placed;
A first fixing member disposed on both sides of the body in the width direction to press the connecting pieces of the brackets placed on the frame;
A second fixing member disposed on one side of the first fixing member and pressing a portion of the frame on which the bracket is not disposed; And
And a driving unit connected to the main body to rotate the main body in one direction or the other direction.
delete delete delete The method of claim 1,
In the welding step,
A method of manufacturing a side seal, characterized in that, while the nut pipe is inserted into the fastening hole, one end and the other end in the longitudinal direction of the nut pipe exposed to the outside of the frame are joined to the body of the bracket.
The method of claim 1,
And an inspection step of applying a torque or eddy current to the nut pipe to compare and analyze a preset torque value or current value.
The method of claim 6,
The inspection step,
A method of manufacturing a side seal, characterized in that it is carried out before the nut pipe is joined to the bracket, or after being joined to the bracket.
delete delete delete

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