KR20040068676A - High Pressure Bellows Forming Device and High Pressure Bellows Forming Method using thereof - Google Patents

Abstract

PURPOSE: A forming apparatus of bellows for high pressure is provided to improve quality of products and reduce defective proportion by accurately forming a creased part of bellows and reduce die fabrication cost by fabricating bellows having various pitches using one die, and a forming method of bellows for high pressure using the same is provided. CONSTITUTION: The forming apparatus of bellows for high pressure comprises a body part(10); a die part which is positioned on an upper part of the body part to form the pipe wok in a certain bellows shape by pressing a pipe work; a horizontal moving part mounted on an upper part of the body part to horizontally move the die part; and a hydraulic nozzle part which is mounted on an upper part of the body part, and an end part of one side of which reaches the die part with being inserted into the pipe work to sealingly support the pipe work and transfer a certain pressure to the inside of the pipe work formed by the die pipe, wherein the die part comprises first vertical cylinder mounting part(210), first vertical upper cylinder(211), first vertical lower cylinder(212), first die, second vertical cylinder mounting part(220), second vertical upper cylinder(221), second vertical lower cylinder(222) and second die, wherein the horizontal moving part comprises first horizontal cylinder mounting part(310), first horizontal cylinder(311), second horizontal cylinder mounting part(320) and second horizontal cylinder(321), wherein the hydraulic nozzle part comprises nozzle pipe(41), two sealing rings and nozzle head, wherein the horizontal moving part further comprises guide bar(50) and guide hole(51), and wherein the hydraulic nozzle part further comprises supporter(60), clamp(61), clamp cylinder(62), supporter cylinder(63) and supporter guide bar(64).

Description

High Pressure Bellows Forming Device and High Pressure Bellows Forming Method using

The present invention relates to a molding apparatus for manufacturing industrial bellows having a plurality of wrinkles and a molding method using the same. As is well known in general, bellows is used to maintain the airtightness of pumps under tightness in pipelines used to transport various fluids, including gases, in a wide range of industries such as automotive piping, construction piping, semiconductors, ships, nuclear power and petrochemicals. It is used as a means of transporting various fluids in a pipe by absorbing heat deformation such as vibration, thermal expansion, and heat shrinkage, and a wider range of products are being developed. These bellows have different manufacturing methods according to the standard, working fluid, pressure, temperature, motion, etc., and in general, forming methods such as hydroforming, roll forming, and hydro bulging. It is produced. In addition, in the manufacture of the bellows in general, a pressure of 150 kgf / cm 2 or less is applied to the pipe material, thereby forming.

As such, the process of forming a bellows corrugation that inflates a part of the pipe material by applying hydraulic pressure to the pipe material seated inside the mold and eventually matching the cross section of the mold is made of a material of high strength such as stainless steel water pipe and structural pipe. In the case of the high-pressure bellows manufactured using the application is limited. In other words, if the strength of the pipe material is large, it is difficult to accurately shape the bellows corrugation with only the low pressure (150 kgf / cm 2) as described above. There is a problem that the unit price rises. In addition, there is a problem in that the shape of the pleats is processed to arbitrarily adjust the pitch of the mountains forming the pleats (the distance between the mountains), so that a separate mold must be processed to produce a product having a different pitch.

The present invention has been made to solve the above problems, the object of the present invention is as follows.

First, when manufacturing high-pressure bellows using high-strength pipe materials such as water and structural pipes, the bellows of the bellows is precisely molded to improve product quality and reduce defective rate, thereby preventing waste of pipe materials and reducing production costs.

Secondly, bellows of various pitches are manufactured using a single mold to reduce unnecessary mold manufacturing costs.

Third, the same mold is arranged in parallel to form a plurality of bellows at the same time.

1 is a schematic front sectional view of a preferred embodiment of the present invention.

Figure 2 is a schematic enlarged partial view showing the process of forming the bellows by the interaction between the first mold and the second mold and the hydraulic nozzle portion of the preferred embodiment of the present invention.

Figure 3 is a schematic plan view showing another embodiment of the present invention for forming a plurality of the same bellows at the same time by arranging a plurality of molds of the same shape in parallel.

Figure 4 is a schematic side view showing another embodiment of the present invention for forming a plurality of the same bellows at the same time by arranging a plurality of molds of the same shape in parallel.

<Description of the symbols for the main parts of the drawings>

10: body part 20: mold part

210: first vertical cylinder mounting portion 211: first vertical upper cylinder

212: first vertical lower cylinder 213: first upper mold

214: first lower mold 215: first mold

216: first opening 220: second vertical cylinder mounting portion

221: second vertical upper cylinder 222: second vertical lower cylinder

223: second upper mold 224: second lower mold

225: second mold 226: second opening

30: horizontal moving part 310: first horizontal cylinder mounting portion

311: first horizontal cylinder 312: pipe inlet

320: second horizontal cylinder mounting portion 321: second horizontal cylinder

322: bellows outlet 40: hydraulic nozzle

41: nozzle pipe 42: sealing ring

43: nozzle head 44: hydraulic injection port

50: guide bar 51: guide hole

60: supporter 61: clamp

62: clamp cylinder 63: support cylinder

64: supporter guide bar

In order to achieve the above object, the present invention is located in the body portion, the upper portion of the body portion is a mold portion for molding a predetermined bellows by pressing the pipe material, mounted on the upper portion of the body portion horizontal movement to move the mold portion in the horizontal direction And a hydraulic nozzle part mounted on the upper part of the body part and inserted into the pipe material to seal and support the pipe material and transmit a predetermined pressure to the inside of the pipe material formed by the mold part. The mold part is moved horizontally by the horizontal moving part while the predetermined pressure is transmitted to the inside of the material, thereby compressing the pipe material to form a predetermined bellows shape and simultaneously moving the pipe material to a predetermined distance. High pressure bellows molding machine and high pressure using the same It proposes a method for forming the row's. The high pressure bellows molding apparatus of the present invention injects a high pressure fluid into the inside of the pipe material to expand the diameter of the pipe material of the portion to be formed by the bellows, and the mold part for moving the primary deformed pipe material is completed in the final shape. Simultaneously, the high pressure bellows is formed through a molding step of moving the pipe material by a predetermined distance, and a returning step of separating the moved mold from the pipe material and returning it to the initial position before the movement. In other words, unlike the conventional method, the mold is fixed and the pipe material is placed inside the fixed mold, and then the hydraulic pressure is applied to the inside of the pipe to produce a bellows that matches the shape of the mold. The pipe material is press-molded by moving, and at the same time, the pipe material is pressed into the mold and moved by a certain distance. Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention;

Figure 1 is a schematic front sectional view of a preferred embodiment of the present invention, hatching of the cross-sectional portion is omitted. According to Figure 1 is a high-pressure bellows molding apparatus of the present invention is located on the body portion 10, the upper portion of the body portion 10 and the mold portion 20, the body portion 10 to compress the pipe material to form a predetermined bellows shape Is mounted on the upper portion of the horizontal moving part 30 to move the mold part 20 in the horizontal direction, and is mounted on the upper part of the body part 10 and inserted into the pipe material to seal and support the pipe material, and the mold part 20 It is configured to include a hydraulic nozzle portion 40 for transmitting a predetermined pressure to the inside of the pipe material is formed by the), the mold in a state in which the predetermined pressure is transmitted to the inside of the pipe material through the hydraulic nozzle portion 40 The part 20 is horizontally moved by the horizontal moving part 30, and compresses the pipe material to form a predetermined bellows shape and simultaneously moves the pipe material to a predetermined distance.

The mold part 20 is mounted vertically on the first vertical cylinder mounting portion 210 and the first vertical cylinder mounting portion 210 having the first opening 216 penetrated in the horizontal direction at the center thereof, and is mounted in a vertical direction. The free end of the first vertical upper cylinder (211) positioned in the first opening 216, the lower portion of the first vertical cylinder mounting portion 210 is mounted in a vertical direction, the free end of the cylinder arm is the first opening 216 Free end of the cylinder arm of the first upper mold 213 and the first vertical lower cylinder 212 coupled with the free end of the cylinder arm of the first vertical lower cylinder 212, the first vertical upper cylinder 211 is located at A first mold 215 composed of a first lower mold 214 to be coupled, a second vertical cylinder mounting portion 220 having a second opening 226 penetrated in the horizontal direction at the center thereof, and a second vertical cylinder mounting portion. Mounted in the vertical direction at the top of the 220 and the free end of the cylinder arm is located in the second opening 226 The second vertical lower cylinder 222, the second vertical lower cylinder 221, is mounted in the vertical direction to the lower portion of the second vertical cylinder mounting portion 220 and the free end of the cylinder arm is located in the second opening 226, the second A second upper mold 223 engaging with the free end of the cylinder arm of the vertical upper cylinder 221 and a second lower mold 224 engaging with the free end of the cylinder arm of the second vertical lower cylinder 222. It comprises a mold 225, as shown in Figure 2, the first mold 215 and the second mold 225 is combined to form a single cross-sectional shape that is a unit constituting the bellows wrinkles do. Accordingly, the first upper mold 213 may be moved by the first vertical upper cylinder 211, and the first lower mold may be moved by the first vertical lower cylinder 212. In addition, the second upper mold 223 may be movable by the second vertical upper cylinder 221, and the second lower mold 224 may be movable by the second vertical lower cylinder 222.

The horizontal moving part 30 is integrally coupled to the body part 10 and horizontally in the first horizontal cylinder mounting part 310 and the first horizontal cylinder mounting part 310 in which a pipe inlet 312 is formed through which pipe material is introduced. The second horizontal cylinder mounting portion 320, the second horizontal cylinder mounting portion 320, the bellows outlet 322 is formed integrally coupled to the first horizontal cylinder 311, the body portion 10 and the molded bellows flow out. It comprises a second horizontal cylinder 321 mounted in a horizontal direction on the first horizontal cylinder mounting portion 310, the first vertical cylinder mounting portion 210, the second vertical cylinder mounting portion 220 and the second horizontal cylinder mounting portion (320) is arranged in sequence and the free end of the cylinder arm of the first horizontal cylinder 311 is coupled to the first vertical cylinder mounting portion 210 and the free end of the cylinder arm of the second horizontal cylinder 321 is the second vertical It is coupled to the cylinder mounting portion 220. Therefore, the first vertical cylinder mounting portion 210 moves horizontally by the first horizontal cylinder 311 and the second vertical cylinder mounting portion 220 moves horizontally by the second horizontal cylinder 321. As a result, the first upper mold 213, the first lower mold 214, the second upper mold 223, and the second lower mold 224 may include the first vertical upper cylinder 211 and the first vertical lower cylinder ( 212), a second vertical upper cylinder 221, a second vertical lower cylinder 222, and a first horizontal cylinder 311. And by the second horizontal cylinder 321 it is possible to move and move horizontally.

The hydraulic nozzle part 40 is coupled to one end of the nozzle pipe 41, two sealing rings 42, and the nozzle pipe 41 having a hollow in the longitudinal direction, and for mounting the sealing ring 42 along the circumferential surface thereof. Two ring mounting grooves are formed while maintaining a predetermined interval, and the circumferential surface between the two ring mounting grooves includes a nozzle head 43 having a hydraulic injection hole 44 connected to the hollow of the nozzle pipe 41 is formed. It is configured by. Although not shown in detail in the accompanying drawings, the hydraulic nozzle part 40 is movable in the horizontal direction, so that the nozzle head 43 is disposed between the first mold 215 and the second mold 225 of the mold part 20. Preset and secure before entering the bellows to be positioned.

As shown in FIG. 1, a guide bar 50 connecting the first horizontal cylinder mounting portion 310 and the second horizontal cylinder mounting portion 320 is installed, and the first vertical cylinder mounting portion 210 and the second vertical cylinder mounting portion ( In each of the 220, a guide hole 51 through which the guide bar penetrates is additionally formed so that the first vertical cylinder mounting portion 210 and the second vertical cylinder mounting portion 220 are guided by the guide bar 50, and the first vertical cylinder mounting portion. 210 may be horizontally moved by the first horizontal cylinder 311 and the second vertical cylinder mounting portion 220 may be horizontally moved by the second horizontal cylinder 321.

In addition, the present invention as shown in Figure 1 of the supporter 60, the supporter 60 is formed on the upper body portion 10 is formed with an arc-shaped mounting groove for mounting the pipe material inserted into the nozzle pipe 41 It may further include a clamp 61 positioned above the mounting groove and vertically movable, and a clamp cylinder 62 mounted vertically to the supporter 60 and having a free end of the cylinder arm engaged with the clamp 61. As shown in FIG. 1, the supporter cylinder 63 and the supporter guide bar 64 may be movable in the horizontal direction from the upper portion of the body portion 10.

The high-pressure bellows molding apparatus of the present invention including the above-described component functions as follows. The hydraulic nozzle part 40 is made to be movable in the horizontal direction from the top of the body portion 10 so that the nozzle head 43 of the hydraulic nozzle part 40 is the first upper mold 213, the first lower mold 214. ), The second upper mold 223, and the second lower mold 224 to be set and fixed to the inner space surrounded by. Push the pipe material so that the hydraulic nozzle portion 40 is inserted into the pipe material and the pipe material is mounted on the supporter 60 formed with an arc-shaped mounting groove, and then the clamp cylinder 62 is operated by the clamp cylinder 62. The pipe material is fixed between the supporter 60 and the clamp cylinder 62, and then the pipe material is fixed using the supporter cylinder 63 and the supporter guide bar 64 installed in the horizontal direction as shown in FIG. Horizontally moved by a distance of so as to be located between the first mold portion 215 and the second mold portion 225. When the initial position of the pipe material is set as described above, the clamp 61 is moved upward by using the clamp cylinder 62 so that the pipe material is simply mounted on the supporter 60. In this state, the pipe material portion to be formed into a single cross-sectional shape, which is a unit constituting the bellows pleat, becomes an airtight space that is kept airtight by two sealing rings 42 mounted on the nozzle head 43. . Here, the first mold 215 using the first horizontal cylinder 311 and the second horizontal cylinder 321 so that the sealed space of the pipe material is located between the first mold 215 and the second mold 225. And move to a predetermined position in the horizontal direction of the second mold (225). Then, the first upper mold 213 is moved downward using the first vertical upper cylinder 211 and the first lower mold 214 is moved upward using the first vertical lower cylinder 212 to move the pipe material up and down. Close in In addition, the second upper mold 223 is moved downward by using the second vertical upper cylinder 221 and the second lower mold 224 is moved upward by using the second vertical lower cylinder 222 to move the pipe material up and down. Close contact The part where the mold part 20 adheres to the pipe material is specifically determined by the height of the bellows peak and the pitch (distance between the peaks). When the mold unit 20 applies hydraulic pressure to the inside of the pipe material through the hydraulic injection port 44 of the hydraulic nozzle unit 40 in a state in which the pipe material is in close contact with the pipe material, a portion of the pipe material is swollen. At this time, the applied pressure ranges from 100 kgf / cm 2 to 1,000 kgf / cm 2, but it is not necessarily limited to this range. It is not necessarily limited to this range. Can be. As shown in FIG. 2 (a), while the second mold 225 is fixed while the second mold 225 is fixed while the pipe material is partially inflated, only the first mold 215 is moved to the first horizontal cylinder 311. The first molding step of moving in the direction of the second mold 225 by pressing the swelling portion of the pipe material and the first molding step in the first molding step while applying the hydraulic pressure as shown in Figure 2 (b) Second mold forming a cross-sectional shape that forms a bellows corrugation unit by simultaneously moving the first mold 215 and the second mold 225 in the same direction in which the mold 215 moves. At the same time, the molding work is performed through the steps, and the pipe material is moved in the direction of the bellows outlet 322 by a predetermined distance corresponding to the horizontal moving distance of the second mold in the second molding step. After the molding is completed, the first upper mold 213 moves upward by the first vertical upper cylinder 211, and the first lower mold 214 moves downward by the first vertical lower cylinder 212, and the second upper mold 213 moves downward. The upper mold 223 moves upward by the second vertical upper cylinder 221, and the second lower mold 224 moves downward by the second vertical lower cylinder 222. Thus, the mold part 20 is moved. When separated from the pipe material, the first horizontal cylinder 311 horizontally moves the first vertical cylinder mounting portion 210, and the second horizontal cylinder 321 horizontally moves the second vertical cylinder mounting portion 220 to the mold part 20. ) Returns the mold to the position before the pipe material is in close contact. By repeating the above operation, the cross-sectional shape of the acid forming the bellows of the bellows is formed one by one, and the pipe material is horizontally moved toward the bellows outlet 322 by the pitch of the acid. After the bellows forming operation is completed, separate the completed pipe material from the hydraulic nozzle part.

The high-pressure bellows molding apparatus having the same structure and function as described above has a plurality of hydraulic nozzle portions 40 arranged in parallel as shown in FIGS. 3 and 4, and the die portion 20 has an acid cross-sectional shape having the same shape. The number of hydraulic nozzles 40 may be formed in parallel to produce a plurality of bellows at the same time. In addition, the position and the number of cylinders used in the present invention is an option that can be freely determined according to the capacity of the equipment, and is not limited to the position and the number of cylinders shown in FIGS.

When explaining step by step the high-pressure bellows molding method using the high-pressure bellows molding apparatus having the configuration and operation as described above is configured to include the following process.

1. The mounting step of sealingly supporting a predetermined portion of the pipe material by inserting the hydraulic nozzle portion 40 into the inner passage of the pipe material.

2. The first mold 215 after placing a predetermined portion of the pipe material sealed by the hydraulic nozzle portion 40 between the first mold 215 and the second mold 225 of the mold 20. A close contact step of moving the second mold 225 up and down to close a predetermined portion of the pipe material.

3. Pressurizing step of increasing the pressure inside the predetermined part of the pipe material through the hydraulic nozzle part 40 to expand the diameter of the predetermined part of the pipe material.

4. The second mold 225 is a first molding step of pressing a predetermined portion of the pipe material by moving the first mold (215) in the direction of the second mold (225) in a fixed state.

5. In the first molding step, the first mold 215 and the second mold 225 are simultaneously moved in the same direction as the first mold 215 is moved, thereby compressing a predetermined portion of the pipe material and simultaneously pipe material. Second molding step of moving by a predetermined distance.

6. The return step of separating the mold 20 from the pipe material to move to the position of the close step.

By repeating the above process, the cross-sectional shape of the bellows-shaped bellows is formed one by one, and the pipe material is horizontally moved toward the bellows outlet 322 by the pitch of the acid. When the bellows molding is completed, the hydraulic nozzle is completed. Separate the finished pipe material from the part.

According to the present invention having the above-described configuration, the following effects can be achieved.

First, in the case of manufacturing a high-pressure bellows using a high-strength pipe material, it is possible to precisely mold the bellows of the bellows to improve the product quality and reduce the defective rate, thereby preventing the waste of the pipe material and reducing the production cost.

Second, the bellows of various pitches can be manufactured using a single mold, thereby reducing unnecessary mold manufacturing costs.

Third, a plurality of hydraulic parts and corresponding mold parts may be installed to simultaneously mold a plurality of bellows.

Claims (9)

Body portion; Located in the upper portion of the body and the mold portion for pressing the pipe material to form a predetermined bellows shape; A horizontal moving part mounted on an upper portion of the body part to move the mold part in a horizontal direction; A hydraulic nozzle unit mounted on an upper portion of the body part, one end of which reaches the mold part, is inserted into a pipe material to seal and support the pipe material, and delivers a predetermined pressure to the inside of the pipe material formed by the mold part; It is configured to include, and the mold portion is moved horizontally by the horizontal moving portion in a state in which a predetermined pressure is transmitted to the inside of the pipe material through the hydraulic nozzle portion to form a bellows shape by pressing the pipe material High-pressure bellows molding apparatus, characterized in that for moving the pipe material at a predetermined distance at the same time. The method of claim 1, wherein the mold portion comprises a first vertical cylinder mounting portion formed with a first opening in the horizontal direction through the center portion; A first vertical upper cylinder mounted vertically on an upper portion of the first vertical cylinder mounting portion and having a free end of a cylinder arm positioned at the first opening; A first vertical lower cylinder mounted vertically under the first vertical cylinder mounting portion and having a free end of a cylinder arm positioned at the first opening; A first mold comprising a first upper mold engaging with the free end of the cylinder arm of the first vertical upper cylinder and a first lower mold engaging with the free end of the cylinder arm of the first vertical lower cylinder; A second vertical cylinder mounting portion having a second opening formed through the center in a horizontal direction; A second vertical upper cylinder mounted vertically on the second vertical cylinder mounting portion and having a free end of a cylinder arm positioned at the second opening; A second vertical lower cylinder mounted vertically under the second vertical cylinder mounting portion and having a free end of a cylinder arm positioned at the second opening; And a second mold configured to include a second upper mold coupled to the free end of the cylinder arm of the second vertical upper cylinder and a second lower mold coupled to the free end of the cylinder arm of the second vertical lower cylinder. The first mold and the second mold is combined to form a single cross-sectional shape that is a unit constituting the bellows pleat shape, characterized in that the high-pressure bellows molding apparatus. 3. The method of claim 2, wherein the horizontal moving part is coupled to the body part integrally with a first horizontal cylinder mounting part having a pipe inlet through which a pipe material is introduced; A first horizontal cylinder mounted in a horizontal direction to the first horizontal cylinder mounting unit; A second horizontal cylinder mounting portion integrally coupled with the body portion and having a bellows outlet for outflowing the molded bellows; A second horizontal cylinder mounted in a horizontal direction to the second horizontal cylinder mounting portion; and including the first horizontal cylinder mounting portion, the first vertical cylinder mounting portion, the second vertical cylinder mounting portion, and the second horizontal cylinder mounting portion. The free end of the cylinder arm of the first horizontal cylinder is arranged in sequence and the free end of the cylinder arm of the second horizontal cylinder is coupled to the second vertical cylinder mounting part. High pressure bellows forming device. According to claim 2 or 3, The hydraulic nozzle unit is a nozzle pipe hollow in the longitudinal direction; Two sealing rings; Two ring mounting grooves coupled to one end of the nozzle pipe and mounting the sealing ring along the circumferential surface are formed while maintaining a predetermined distance, and the hollow surface of the nozzle pipe is formed on the circumferential surface between the two ring mounting grooves. High-pressure bellows molding apparatus comprising a; nozzle head which is connected to the hydraulic injection port is formed. According to claim 2 or 3, wherein the plurality of the hydraulic nozzle portion is arranged in parallel and the mold portion consisting of the first mold and the second mold has the same cross-sectional shape of the same shape in parallel with the number of the hydraulic nozzle portion High pressure bellows molding apparatus, characterized in that formed. The guide bar of claim 3, wherein the guide bar connects the first horizontal cylinder mounting portion and the second horizontal cylinder mounting portion. And a guide hole through which the guide bar is formed in each of the first vertical cylinder mounting portion and the second vertical cylinder mounting portion. The supporter of claim 4, further comprising: a supporter having an arc-shaped mounting groove mounted on an upper portion of the body to mount a pipe material inserted into the nozzle pipe; A clamp located above the mounting groove of the supporter and movable in a vertical direction; A clamp cylinder mounted to the support in a vertical direction and having a free end of a cylinder arm engaged with the clamp; A supporter cylinder mounted to the supporter in a horizontal direction; and, And a supporter guide mounted to the supporter in a horizontal direction, wherein the supporter is horizontally movable by a supporter cylinder and a supporter guide installed horizontally. A mounting step of sealingly supporting a predetermined portion of the pipe material by inserting a hydraulic nozzle part into an inner passage of the pipe material; An adhesion step of closely contacting a mold part having a predetermined bellows shape with a predetermined portion of a pipe material sealed and supported by the hydraulic nozzle part; A pressurizing step of expanding a diameter of a predetermined portion of the pipe material by raising a pressure inside the predetermined portion of the pipe material through the hydraulic nozzle part; A molding step of pressing and molding a predetermined portion of the pipe material having an expanded diameter by moving the mold part; High pressure bellows molding method using a high-pressure bellows molding apparatus comprising a; returning step of separating the mold from the pipe material to move to the position of the close contact step. The method of claim 8, wherein the step of close contact with the pipe between the first mold and the second mold of claim 2, wherein the predetermined portion of the sealed pipe material is moved between the first mold and the second mold up and down It is characterized in that the predetermined portion in close contact, The molding step may include a first molding step of compressing a predetermined portion of a pipe material by moving the first mold in the second mold direction while the second mold is fixed; In the first forming step, the first mold and the second mold are simultaneously moved in the same direction as the first mold is moved, thereby compressing a predetermined portion of the pipe material and moving the pipe material by a predetermined distance. High-pressure bellows molding method using a high-pressure bellows molding apparatus comprising a second molding step.