KR102352067B1 - Bellows Manufacturing Device And Bellows Manufacturing Method Using The Same - Google Patents

Abstract

The present invention relates to a bellows manufacturing apparatus, which is implemented so that welding and Teflon coating can be performed on a flange with a certain standard without damaging bellows wrinkles, and a bellows manufacturing method using the same. The apparatus comprises: a bellows-only jig for fastening an inner circumferential surface of the bellows to which the flange is to be coupled; a vision unit for detecting the inner diameter of the bellows fastened to the bellows-only jig, the thickness of a cut surface, and the angular distribution of the cut surface; a side cutting unit for primarily cutting the bellows fastened to the bellows-only jig; a grinding cutting unit for grinding the cut surface of the bellows primarily cut by the side cutting unit to a target cutting point in a grinding manner; a flange jig for fastening the flange to be coupled to the bellows; a rotating unit provided with the vision unit, the side cutting unit, the grinding cutting unit, and the flange jig, and rotating and moving the vision unit, the side cutting unit, the grinding cutting unit, and the flange jig while rotationally driving in response to a process of each device; a welding unit for welding and bonding the bellows and the flange after the cutting process by the side cutting unit and the grinding cutting unit is completed; a coating unit for performing Teflon coating on the flange welded bellows; and a control unit for controlling the driving of the bellows-only jig, the vision unit, the side cutting unit, the grinding cutting unit, the flange jig, the rotating unit, the welding unit, and the coating unit.

Description

Bellows Manufacturing Device And Bellows Manufacturing Method Using The Same

The present invention relates to a bellows manufacturing apparatus and a bellows manufacturing method using the same, and more particularly, to a bellows manufacturing apparatus and bellows manufacturing using the same, so that welding and Teflon coating can be performed to a predetermined standard on a flange without damage to the bellows wrinkles it's about how

In general, it protects piping and equipment by absorbing excessive stress applied to the piping line from problems such as expansion and contraction of piping, which can be said to be blood vessels of modern industrial facilities, vibration problems of driving equipment, movement and damage caused by wind pressure and earthquake, etc. As a means for this, a bellows-type expansion tube capable of absorbing displacement in the longitudinal direction of the pipe is connected and constructed at regular intervals and is used.

In particular, the use of acid-resistant bellows is increasing every year due to the expansion, new and larger size of acid-resistant facilities according to the increase in the required amount of stainless-steel.

In the conventional manufacturing method of the bellows expansion tube, a wrinkled bellows is formed by inserting a Teflon tube into the mold device, heating the mold device to a high temperature, and then injecting high-pressure air through the injection hole inside the tube to expand the tube. was molded.

The bellows manufactured by the conventional bellows manufacturing method, as well as having the disadvantage that corrosion frequently occurs in the welding area (B) shown in FIG. ) by hand cutting and using, as shown in (a), (b) and (c) of Fig. 2, the bellows (P) to the flange (F) is not welded to the correct diameter every time. It also had the disadvantage that the quality could be deteriorated.

On the other hand, the above-mentioned background art is technical information that the inventor possessed for the purpose of derivation of the present invention or acquired during the derivation process of the present invention, and it cannot be said that it is necessarily known technology disclosed to the general public before the filing of the present invention. .

Korean Patent No. 10-2258185 Korean Patent Registration No. 10-0490214

One aspect of the present invention provides a bellows manufacturing apparatus and a bellows manufacturing method using the same, which is implemented so that welding and Teflon coating can be performed to a predetermined standard on a flange without damage to the wrinkles of the bellows.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

Bellows manufacturing apparatus according to an embodiment of the present invention, a bellows dedicated jig for fastening the inner circumferential surface of the bellows to which a flange is to be coupled; a vision unit for detecting the inner diameter of the bellows fastened to the bellows-only jig, the thickness of the cut surface, and the angular distribution of the cut surface; a side cutting part for first cutting the bellows fastened to the bellows-only jig; a grinding cutting unit for grinding the cut surface of the bellows first cut by the side cutting unit to a target cutting point in a grinding manner; a flange jig for fastening the flange to be coupled to the bellows; The vision unit, the side cutting unit, the grinding cutting unit, and the flange jig are installed, and the vision unit, the side cutting unit, the grinding cutting unit and the a rotating part for rotating the flange jig; a welding part for welding the side cutting part and the bellows and the flange on which the cutting process by the grinding cutting part is completed; Coating unit for performing Teflon coating on the flange welded bellows; and a control unit for controlling the operation of the bellows-only jig, the vision unit, the side cutting unit, the grinding cutting unit, the flange jig, the rotating unit, the welding unit, and the coating unit.

In one embodiment, the side cutting unit may first cut the bellows by inserting a rotating cutting blade from the side of the bellows fastened to the bellows-only jig.

In one embodiment, the vision unit is, after first detecting a position where the inner diameter where the primary cutting is to be performed by the side cutting unit in the folds repeatedly formed on the bellows fastened to the bellows-only jig, When the primary cutting is performed by the side cutting unit, the thickness and angle distribution of the cut surface of the bellows on which the primary cutting is performed by the side cutting unit may be detected secondary.

In an embodiment, the control unit may check whether the final polishing target diameter of the bellows is achieved by the grinding cutting unit using the secondary detection data transmitted from the vision unit.

In one embodiment, the control unit, when the primary grinding of the cut surface of the bellows to 80% of the target diameter by the grinding cutting unit is completed, the vision inspection of the cut surface of the primary polished bellows delivered from the vision unit After confirming the third detection data, the remaining 20% is secondarily polished to perform the polishing process up to the target diameter.

In one embodiment, the bellows-only jig, a plurality of block supports arranged to be spaced apart from each other at regular intervals so as to be arranged at regular intervals on the inside of the bellows; and a plurality of fastening blocks installed at each end of the plurality of block supports to fasten the inside of the folds that are formed by bending to the outside among the folds repeatedly formed in the bellows.

In one embodiment, the bellows dedicated jig, a support unit; A plurality of block support installed along the upper side of the support unit spaced apart from each other so as to be arranged at regular intervals on the inside of the bellows; a plurality of first fastening blocks installed at each end of the plurality of block supports to fasten the inner side of the folds formed by bending to the outside among the folds repeatedly formed in the bellows; A plurality of second fastening blocks installed to be spaced apart from the first fastening block downward at each end of the plurality of block supports to fasten the inner side of the folds that are formed by bending outwardly among the folds repeatedly formed in the bellows; and connected to the upper part of the support unit, and when the plurality of first fastening blocks and the plurality of second fastening blocks are seated inside the bellows, it rises upward from the support unit to widen the distance between the plurality of block supports It may include an expansion unit.

In one embodiment, the block support forms an inclined surface such that the inner surface facing the other block supports is closer to the other block support from the lower side to the upper side, and the sliding guide hole formed through in the left and right width direction faces the inclined surface while extending in the vertical direction.

In one embodiment, the expansion unit may include: a unit body installed and connected to an upper portion of the support unit so that the length exposed while being exposed from the support unit is extended or the length exposed while being inserted into the support unit is contracted; a plurality of inclined surface seating grooves formed at regular intervals along the upper outer side of the unit body so that each inclined surface of the block support can be disposed; and a plurality of fastening rings installed across the inclined surface seating groove and fastened to the sliding guide hole formed in the block support disposed in the inclined surface seating groove.

A bellows manufacturing method for coupling a bellows and a flange using the bellows manufacturing apparatus according to the present invention comprises: a bellows mounting step of fastening an inner circumferential surface of the bellows to which the flange is to be coupled to the bellows-only jig; a primary vision checking step of first detecting a position where the inner diameter where the primary cutting is to be performed by the side cutting unit in the folds repeatedly formed on the bellows fastened to the bellows jig using the vision unit; a first cutting step of first cutting the bellows by inserting a rotating cutting blade from the side of the bellows fastened to the bellows-exclusive jig using the side cutting part; a secondary vision checking step of secondarily detecting the thickness and angular distribution of the cut surface of the bellows on which the primary cutting is performed by the side cutting unit using the vision unit; a secondary cutting step of using the grinding cutting unit to grind the cut surface of the bellows first cut by the side cutting unit to a target cutting point in a grinding manner; a bellows welding step of welding the bellows and the flange to join them when the secondary cutting step is completed; and a Teflon coating step of performing Teflon coating on the flange-welded bellows.

According to one aspect of the present invention described above, by performing welding and Teflon coating to a certain standard on the flange without damaging the wrinkles of the bellows, it is possible to provide the effect of improving the quality of the bellows product.

The effects of the present invention are not limited to the above-mentioned effects, and various effects may be included within the range apparent to those skilled in the art from the following description.

1 and 2 are views illustrating a conventional product in which a bellows and a flange are combined.
3 is a view showing a schematic configuration of a bellows manufacturing apparatus according to an embodiment of the present invention.
4 is a view for explaining the cutting of the bellows according to the present invention.
5 is a view showing an embodiment of the bellows dedicated jig of FIG.
6 and 7 are views showing another embodiment of the bellows dedicated jig of FIG.
FIG. 8 is a view showing the expansion unit of FIG. 6 .
9 is a flowchart illustrating a method for manufacturing a bellows according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0010] Reference is made to the accompanying drawings, which show by way of illustration specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein with respect to one embodiment may be implemented in other embodiments without departing from the spirit and scope of the invention. In addition, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the present invention. Accordingly, the detailed description set forth below is not intended to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all scope equivalents as those claimed. Like reference numerals in the drawings refer to the same or similar functions throughout the various aspects.

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

3 is a view showing a schematic configuration of a bellows manufacturing apparatus according to an embodiment of the present invention.

Referring to FIG. 3 , the bellows manufacturing apparatus 10 according to an embodiment of the present invention includes a dedicated jig 100 , a vision unit 200 , a side cutting unit 300 , a grinding cutting unit 400 , It includes a flange jig 500 , a rotating part 600 , a welding part 700 , a coating part 800 , and a control part 900 .

The bellows-only jig 100 fastens the inner peripheral surface of the bellows (P) to which the flange (F) is to be coupled.

In the case of the conventional method of manufacturing a bellows, as the bellows is fixed from the outside of the bellows, damage such as crushing of the bellows may occur.

Accordingly, in the case of the present invention, as the bellows (P) is fastened from the inside of the bellows (P) using a bellows-only jig 100 to be described later, the bellows (P) can be fastened without damage to the shape of the bellows (P). can provide advantages.

The vision unit 200 detects the inner diameter of the bellows (P), the thickness of the cut surface, and the angle distribution of the cut surface, which are fastened to the bellows dedicated jig 100, and the inner diameter of the bellows (P), the thickness of the cut surface, and the angle of the cut surface The detection data such as distribution is transmitted to the control unit 900 .

The side cutting unit 300 first cuts (C1) the bellows (P) fastened to the bellows-only jig 100 using a rotary blade (not shown in the drawing for convenience of explanation).

In one embodiment, the side cutting unit 300 may first cut the bellows (P) by inserting a cutting blade rotating from the side of the bellows (P) fastened to the bellows-only jig 100 (C1). have.

The grinding cutting unit 400 grinds the cut surface of the bellows P, which is first cut (C1) by the side cutting unit 300, to the target cutting point in a grinding method to make a secondary cut (C2). .

The flange jig 500 fastens the flange F to be coupled to the bellows P.

The rotating unit 600 is provided with a vision unit 200, a side cutting unit 300, a grinding cutting unit 400 and a flange jig 500, and is rotated in response to the process of each device while the vision unit ( 200), the side cutting unit 300, the grinding cutting unit 400, and the flange jig 500 are rotated and moved.

The welding part 700 welds and combines the bellows P and the flange F after the cutting process by the side cutting part 300 and the grinding cutting part 400 has been completed.

Coating unit 800, the flange (F) is welded to the bellows (P) is coated with Teflon for acid resistance.

The control unit 900 includes a bellows dedicated jig 100 , a vision unit 200 , a side cutting unit 300 , a grinding cutting unit 400 , a flange jig 500 , a rotating unit 600 , and a welding unit 700 . , and controls the driving of the coating unit 800 .

In one embodiment, the vision unit 200, the primary cutting (C1) by the side cutting unit 300 in the folds repeatedly formed in the bellows (P) fastened to the bellows-only jig 100 is to be performed. After first detecting the position with the smallest inner diameter, when the first cutting (C1) is performed by the side cutting unit 300, the cut surface of the bellows (P) where the primary cutting is performed by the side cutting unit 300 After secondary detection of the thickness and angle distribution, the difference detection data may be transmitted to the controller 900 .

In an embodiment, the control unit 900 checks whether the final polishing target diameter of the bellows P is achieved by the grinding cutting unit 400 using the secondary detection data transmitted from the vision unit 200 . can

In one embodiment, the control unit 900, when the primary grinding of the cut surface of the bellows (P) to 80% of the target diameter by the grinding cutting unit 400 is completed, the 1 transmitted from the vision unit 200 After confirming the tertiary detection data obtained by vision inspection of the cut surface of the primary polished bellows (P), the remaining 20% is secondary polished to perform a grinding process (ie, secondary cutting (C2)) to the target diameter.

Bellows manufacturing apparatus 10 according to an embodiment of the present invention having the configuration as described above, by performing welding and Teflon coating to a predetermined standard on the flange without damage to the wrinkles of the bellows, to secure the quality of the Teflon coating and corrosion It is possible to improve the quality of bellows products, such as preventing

5 is a view showing an embodiment of the bellows dedicated jig of FIG.

Referring to FIG. 5 , the bellows-only jig 100 according to an embodiment includes a plurality of block supports 110 and a plurality of fastening blocks 120 .

The block support 110 is spaced apart from each other at regular intervals so as to be disposed at regular intervals on the inside of the bellows P, and a fastening block 120 is installed at each end.

The fastening block 120 is installed at each end of the plurality of block supports 110 to fasten the inner side of the folds formed by bending outwardly among the folds repeatedly formed in the bellows (P).

Bellows-only jig 100 according to an embodiment having the configuration as described above, by stably fastening the bellows (P) without damage to the bellows (P) of the corrugated form, the bellows during the process such as cutting, welding and coating The movement of (P) can be minimized to improve the quality of the finished product of the bellows (P).

6 and 7 are views showing another embodiment of the bellows dedicated jig of FIG.

6 and 7, the bellows-only jig 100a according to another embodiment is a support unit 130, a plurality of block supports 140, a plurality of first fastening blocks 150, a plurality of second It includes a fastening block 160 and an expansion unit 170 .

The support unit 130 is a cylinder device for extending or contracting the expansion unit 170 in the vertical direction. The expansion unit 170 is connected to the upper part, and a plurality of block supports 140 are provided along the upper edge. They are installed at regular intervals (see FIG. 8).

The block support 140 is installed along the upper side of the support unit 130 by being spaced apart from each other at regular intervals so as to be arranged at regular intervals on the inside of the bellows P, and the first fastening block 150 along the upper outer side. And the second fastening block 160 is installed.

In one embodiment, the block support 140 is formed with an inclined surface 141 such that the inner surface facing the other block supports 140 is closer to the other block support 140 from the lower side to the upper side, and a fastening ring ( Sliding guide holes 142 that are formed through in the left and right width directions so that the 173) can be seated and moved may be formed to extend in the vertical direction while facing the inclined surface 141 .

The first fastening block 150 is installed at each end of the plurality of block supporters 140, and the inside of the folds formed by bending to the outside among the folds repeatedly formed in the bellows (P) is the second fastening block 160 . contract with

The second fastening block 160 is installed to be spaced downward from the first fastening block 150 at each end of the plurality of block supports 140, and is formed by bending outwardly out of the folds repeatedly formed in the bellows (P). The inner side of the wrinkle to be fastened together with the first fastening block 150 .

The expansion unit 170 is connected and installed on the upper portion of the support unit 130 , and when the plurality of first fastening blocks 150 and the plurality of second fastening blocks 160 are seated inside the bellows P, FIG. 7 . As shown in, the bellows (P) is rigid by the first fastening block 150 and the second fastening block 160 by increasing the space between the plurality of block supports 140 by rising upward from the support unit 130 as shown in FIG. to be securely fastened.

At this time, the expansion unit 170 is raised as shown in FIG. 7 to not only widen the gap between the plurality of block supports 140 , but is also lowered to close the gap between the plurality of block supports 140 again. can make it

Bellows-only jig 100a according to another embodiment having the configuration as described above, not only can more stably fasten the bellows (P) without damage to the bellows (P) of the corrugated form, but also from the bellows (P) By implementing easy separation, the movement of the bellows (P) is minimized during processes such as cutting, welding and coating, thereby improving the quality of the finished product of the bellows (P) and improving the efficiency of the process

FIG. 8 is a view showing the expansion unit of FIG. 6 .

Referring to FIG. 8 , the expansion unit 170 includes a unit body 171 , a plurality of inclined surface seating grooves 172 , and a plurality of fastening rings 173 .

The unit body 171 is connected and installed on the upper portion of the support unit 130 so that the length exposed while being exposed from the support unit 130 is extended or the length exposed while being inserted into the support unit 130 is contracted.

The inclined surface seating groove 172 is formed at regular intervals along the upper outer side of the unit body 171 so that each inclined surface 141 of the block support 140 can be disposed.

The fastening ring 173 is installed across the inclined surface seating groove 172 and is fastened to the sliding guide hole 142 formed in the block support 140 disposed in the inclined surface seating groove 172 .

In the expansion unit 170 having the configuration as described above, the fastening and separation of the bellows P by the first fastening block 150 and the second fastening block 160 while repeating the rising and falling is performed more stably can make it happen

9 is a flowchart illustrating a method for manufacturing a bellows according to an embodiment of the present invention.

Referring to FIG. 9, it relates to a bellows manufacturing method for coupling a bellows (P) and a flange (F) using the bellows manufacturing apparatus 10 described above in FIGS. 3 to 8. First, a bellows-only jig 100 ) to fasten the inner peripheral surface of the bellows (P) to which the flange (F) is to be coupled (S110).

In the folds repeatedly formed on the bellows (P) fastened to the bellows-only jig 100 using the vision unit 200, the position with the smallest inner diameter where the primary cutting is to be performed by the side cutting unit 300 is 1 A difference is detected (S120).

The first cutting of the bellows (P) by inserting a rotating cutting blade from the side of the bellows (P) fastened to the bellows-only jig (100) using the side cutting unit (300) (S130).

The thickness and angular distribution of the cut surface of the bellows P on which the primary cutting is performed by the side cutting unit 300 using the vision unit 200 are secondarily detected (S140).

Using the grinding cutting unit 400, the cut surface of the bellows P first cut by the side cutting unit 300 is polished to the target cutting point in the grinding method (S150).

When the secondary cutting step is completed, the bellows (P) and the flange (F) are welded and combined (S160).

By performing Teflon coating on the bellows (P) to which the flange (F) is welded, a finished product is manufactured (S170).

The above-described embodiments are for illustration, and those of ordinary skill in the art to which the above-described embodiments pertain can easily transform into other specific forms without changing the technical idea or essential features of the above-described embodiments. you will understand Therefore, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope to be protected through this specification is indicated by the claims below rather than the detailed description, and should be construed to include all changes or modifications derived from the meaning and scope of the claims and their equivalents. .

10: Bellows manufacturing device
100: dedicated jig
200: vision division
300: side cut
400: grinding cutting unit
500: flange jig
600: rotating part
700: weld
800: coating part
900: control unit

Claims (10)

Bellows capable of absorbing displacement in the longitudinal direction of the pipe;
a pair of flanges coupled to both ends of the bellows;
The bellows and the flange are coupled by welding, and the inner surface of the bellows is characterized in that a Teflon coating is formed,
a bellows-only jig for fastening the inner circumferential surface of the bellows to which the flange is to be coupled;
a vision unit for detecting the inner diameter of the bellows fastened to the bellows-only jig, the thickness of the cut surface, and the angular distribution of the cut surface;
a side cutting part for first cutting the bellows fastened to the bellows-only jig;
a grinding cutting unit for grinding the cut surface of the bellows first cut by the side cutting unit to a target cutting point in a grinding manner;
a flange jig for fastening the flange to be coupled to the bellows;
The vision unit, the side cutting unit, the grinding cutting unit, and the flange jig are installed, and the vision unit, the side cutting unit, the grinding cutting unit and the a rotating part for rotating the flange jig;
a welding part for welding the side cutting part and the bellows and the flange on which the cutting process by the grinding cutting part is completed;
Coating unit for performing Teflon coating on the flange welded bellows; and
a control unit for controlling the operation of the bellows-only jig, the vision unit, the side cutting unit, the grinding cutting unit, the flange jig, the rotating unit, the welding unit, and the coating unit;
The side cut portion,
A bellows manufacturing apparatus for primary cutting of the bellows by inserting a rotating cutting blade from the side of the bellows fastened to the bellows-only jig.
According to claim 1, wherein the vision unit,
In the folds repeatedly formed on the bellows fastened to the bellows-only jig, the position where the inner diameter where the primary cutting is to be performed is first detected by the side cutting unit, and then the primary cutting is performed by the side cutting unit When performed, the bellows manufacturing apparatus for secondary detection of the thickness and angle distribution of the cut surface of the bellows on which the primary cutting is performed by the side cutting unit.
According to claim 2, wherein the control unit,
A bellows manufacturing apparatus for confirming whether the final grinding target diameter of the bellows is achieved by the grinding cutting unit by using the secondary detection data transmitted from the vision unit.
According to claim 3, wherein the control unit,
When the primary grinding of the cut surface of the bellows is completed by the grinding cutting unit to 80% of the target diameter, the third detection data of the vision inspection of the cut surface of the primary polished bellows transmitted from the vision unit is confirmed, and the remaining A bellows manufacturing apparatus that performs a grinding process up to a target diameter by secondary grinding 20%.
According to claim 1, wherein the bellows dedicated jig,
A plurality of block supports arranged to be spaced apart from each other at regular intervals so as to be arranged at regular intervals on the inside of the bellows; and
A plurality of fastening blocks installed at each end of the plurality of block supporters to fasten the inside of the folds that are formed by bending to the outside among the folds repeatedly formed in the bellows; Containing, Bellows manufacturing apparatus.
According to claim 1, wherein the bellows dedicated jig,
support unit;
A plurality of block support installed along the upper side of the support unit spaced apart from each other so as to be arranged at regular intervals on the inside of the bellows;
a plurality of first fastening blocks installed at each end of the plurality of block supports to fasten the inner side of the folds formed by bending to the outside among the folds repeatedly formed in the bellows;
A plurality of second fastening blocks installed to be spaced apart from the first fastening block downward at each end of the plurality of block supports to fasten the inner side of the folds that are formed by bending outwardly among the folds repeatedly formed in the bellows; and
It is connected and installed on the upper part of the support unit, and when the plurality of first fastening blocks and the plurality of second fastening blocks are seated inside the bellows, it rises upward from the support unit to widen the gap between the plurality of block supports Expansion unit; Containing, Bellows manufacturing apparatus.
According to claim 6, The block support,
The inner surface opposite to the other block supports forms an inclined surface so as to be closer to the other block support from the lower side to the upper side, and the sliding guide holes formed through the left and right width directions are formed to extend in the vertical direction while facing the inclined surface. Device.
The method of claim 7, wherein the expansion unit,
a unit body connected and installed on the upper portion of the support unit so that the length exposed while being exposed from the support unit is extended or the length exposed while being inserted into the support unit is contracted;
a plurality of inclined surface seating grooves formed at regular intervals along the upper outer side of the unit body so that each inclined surface of the block support can be disposed; and
A bellows manufacturing apparatus including; a plurality of fastening rings installed across the inclined surface seating groove and fastened to the sliding guide hole formed in the block support disposed in the inclined surface seating groove.
In the bellows manufacturing method for coupling a bellows and a flange using the bellows manufacturing apparatus according to any one of claims 1 to 8,
a bellows mounting step of fastening the inner circumferential surface of the bellows to which the flange is to be coupled to the bellows-only jig;
a primary vision checking step of first detecting a position where the inner diameter where the primary cutting is to be performed by the side cutting unit in the folds repeatedly formed on the bellows fastened to the bellows jig using the vision unit;
a first cutting step of first cutting the bellows by inserting a rotating cutting blade from the side of the bellows fastened to the bellows-exclusive jig using the side cutting part;
a secondary vision checking step of secondarily detecting the thickness and angular distribution of the cut surface of the bellows on which the primary cutting is performed by the side cutting unit using the vision unit;
a secondary cutting step of using the grinding cutting unit to grind the cut surface of the bellows first cut by the side cutting unit to a target cutting point in a grinding manner;
a bellows welding step of welding the bellows and the flange to join them when the secondary cutting step is completed; and
A method of manufacturing a bellows comprising a; Teflon coating step of performing Teflon coating on the flange welded bellows. delete

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