KR102587774B1 - System for forming groove in metal tube - Google Patents

Abstract

The present invention includes a housing portion (10) having a space of a certain size therein; A rotating plate 21 is formed with a movable groove 213 vertically upward from the central portion and is coupled to the front portion of the housing portion 10. A pair of fixing pieces 23, left and right, are fixedly coupled to the lower side of the central portion of the rotating plate 21. It consists of a support wheel 24 rotatably mounted on the fixed piece 23, a movable piece 25 slidably coupled to the movable groove 213, and a movable piece 25 facing the support wheel 24. ) a tube forming unit (20) provided with a forming wheel (26) rotatably mounted on the lower portion of the tube; The rear end portion is installed to penetrate the rear portion of the housing portion (10), and the front end portion is the first and second hydraulic hoses (31, 32) and the first and second hydraulic hoses (31) extending to the front portion of the housing portion (10). , 32) A cylinder 33 connected to each front end portion, the lower portion connected to the cylinder 33, and the extended upper portion provided with a piston rod 35 coupled to one rear portion of the movable piece 25. hydraulic part; The first and second gripping slides (44, 45) are located at a certain distance in front of the tube forming part (20) at the top and bottom, and have first and second gripping surfaces (441, 451) formed on the lower and upper surfaces, respectively. Tube fixing part (40) provided with; A metal consisting of a driving motor unit (50) that is axially connected to the rear portion of the tube forming unit (20) and rotates the tube forming unit (20) when the metal tube (P) is fixed to the tube fixing unit (40). Provides a tube groove forming system.

Description

Groove forming system for metal tube {System for forming groove in metal tube}

The present invention relates to a system that can form grooves on the surface of a metal tube. More specifically, it can provide improved forming force and provides a very stable restraint state during the forming process even if the metal tube has various diameters. It relates to a groove forming system for metal tubes that is capable of maintaining grooves and fundamentally preventing grooves from being formed in unintended areas.

Typically, ferrules are used in metal tube fittings through which high-pressure fluid flows. When the nut is rotated while the metal tube through which the ferrule is inserted is inserted into the body, the tip of the ferrule is deformed by the rotation of the nut and the metal tube is formed. Fitting is achieved by strongly gripping the surface.

On the other hand, if there is damage to the surface of the metal tube, leakage may occur through the damaged area in a high-pressure environment, and if the hardness of the ferrule is lower than that of the metal tube, proper gripping is not possible, so heat treatment such as nitriding treatment is performed. Fitting work on a metal tube is being performed using a ferrule. However, when heat treatment is performed on the ferrule, the hardness of the ferrule can be increased, but there is a problem in that the corrosion resistance of the ferrule is lowered, which acts as a potential cause of leakage.

Among the technologies known to be devices for forming grooves on the surface of a tube made of metal, there is Korean Patent No. 0612624 as shown in Figure 6a. This technology provides a plurality of disk units (200a, 200b, 200c), each of which can move in the radial direction along a plurality of cam grooves (302) formed inside the cam plate (300), has the configuration shown in Figure 6b, , Disks 220a, 220b, and 220c are mounted on each of the disk units 200a, 200b, and 200c, and a groove is formed on the surface of the metal tube.

However, in this technology, when a strong rotational force is transmitted from the drive motor 410, the disks 220a, 220b, and 220c are brought into close contact with the surface of the metal tube with strong force to form a groove on the surface of the metal tube. It cannot be applied to metal tubes below a certain thickness. In addition, since the disk is in close contact with the metal tube using a three-point contact method to form a groove, there is a problem that if any one of the disks deviates from its original position, it is impossible to form a groove with a certain pitch.

Republic of Korea Patent No. 0612624

The present invention was proposed to solve the problems of the prior art, and the object of the present invention is to provide a forming system for a metal tube that can more accurately form a groove at an intended point and depth in a metal tube stably for a long time. It is provided.

In order to achieve the above object, the present invention includes a housing portion (10) having a space of a certain size therein; A rotating plate 21 is formed with a movable groove 213 vertically upward from the central portion and is coupled to the front portion of the housing portion 10. A pair of fixing pieces 23, left and right, are fixedly coupled to the lower side of the central portion of the rotating plate 21. It consists of a support wheel 24 rotatably mounted on the fixed piece 23, a movable piece 25 slidably coupled to the movable groove 213, and a movable piece 25 facing the support wheel 24. ) a tube forming unit (20) provided with a forming wheel (26) rotatably mounted on the lower portion of the tube; The rear end portion is installed to penetrate the rear portion of the housing portion (10), and the front end portion is the first and second hydraulic hoses (31, 32) and the first and second hydraulic hoses (31) extending to the front portion of the housing portion (10). , 32) A cylinder 33 connected to each front end portion, the lower portion connected to the cylinder 33, and the extended upper portion provided with a piston rod 35 coupled to one rear portion of the movable piece 25. hydraulic part; The first and second gripping slides (44, 45) are located at a certain distance in front of the tube forming part (20) at the top and bottom, and have first and second gripping surfaces (441, 451) formed on the lower and upper surfaces, respectively. Tube fixing part (40) provided with; A driving motor unit (50) that is axially connected to the rear portion of the tube forming unit (20) and rotates the tube forming unit (20) when the metal tube (P) is fixed to the tube fixing unit (40). It has its technical features.

Supports 41 are located at regular intervals in front of the tube forming part 20, the rear part faces the front part of the rotating plate 21, and starting from the central part, the first and second vertically upward and vertically downward, respectively. The lower part of the fixing plate 43 where the cut grooves 431 and 433 are formed is fixed to the support 41, and a first guide hole 443 inclined by θ is provided on the upper part of the first gripping slide 44. It is formed and slidably coupled to the first cut groove 431, and a second guide hole 453 inclined by -θ is formed on the lower part of the second grip slide 45 to form a second cut groove 433. A movable fork 47, which is slidably coupled to the first and second forks 471 and 473 inserted into the first and second guide holes 443 and 453, respectively, is provided on one side of the fixed plate 43. Located in , the other side is coupled to the upper side of the support 41, and one side is coupled to the other side of the movable fork 47, so that the driving cylinder 49 can be provided to move the movable fork 47 forward and backward. .

A tube detection unit 60 is provided in the insertion groove 215 of a certain depth formed in the center of the rotating plate 21, and the tube detection unit 60 is provided with a tube contact surface 611 on one side. A contact end 613 is formed protruding on the other surface, and a tube resting end 61 is located on one side of the insertion groove 215, and is located at a certain distance from the contact end 613, and the insertion groove ( It may be composed of a contact sensor 67 embedded in the other side of 215) and an elastic means 63 provided on the outer surface of the contact end 613 to control the contact point between the contact end 613 and the contact sensor 67. .

The present invention proposes a two-point contact method in which a forming wheel and a support wheel are arranged starting from a metal tube in forming a groove in a metal tube, thereby providing improved forming force and forming a metal having a certain thickness or more. It is possible to form grooves in tubes very easily.

In addition, the present invention proposes a method of fixing a metal tube using a fixing means that can slide vertically up and down by a driving cylinder, so that even if the metal tube as the work object has various diameters, it is very stable during the forming operation. It is possible to maintain a stable restraint state.

In addition, the present invention is configured to check whether a specific part of the metal tube that needs forming is located in the correct position of the tube forming part through the tube detection unit, thereby fundamentally eliminating the case where a groove is formed in an unintended part of the metal tube. It can be prevented.

1 is a schematic overall configuration diagram of the molding system according to the present invention.
2A and 2B each show a schematic operational configuration diagram of the tube forming unit in the forming system according to the present invention.
Figure 3 is a schematic perspective view of the forming wheel and support wheel in the tube forming part of the forming system according to the present invention.
Figures 4a and 4b each show a schematic operational configuration diagram of the tube fixing part in the molding system according to the present invention.
Figures 5a and 5b each show a schematic operational configuration diagram of the tube detection unit in the molding system according to the present invention.
Figure 6a is a schematic diagram of a conventional metal tube groove forming system.
Figure 6b is a schematic perspective view of the disk unit in Figure 6a.

Preferred embodiments according to the present invention will be examined in detail with reference to the accompanying drawings as follows. In describing the embodiments of the present invention in detail, there is no direct relationship with the technical features of the present invention, or general knowledge in the technical field to which the present invention belongs. Detailed explanations will be omitted for matters that are obvious to those with knowledge.

The present invention relates to a system for forming grooves in a metal tube, including a housing part 10, a tube forming part 20, a hydraulic part, a tube fixing part 40, a drive motor part 50, and their respective operations. It has the characteristic of including a control unit (not shown) that controls. Let's look at each of these configurations in detail with reference to the attached drawings.

The housing part 10 is a part that supports the tube forming part 20, and a space of a certain size is provided therein. The housing unit 10 may be installed on the upper surface of the support table 1 having a certain vertical height as shown in FIG. 1.

The tube forming part 20 is a part that creates a groove of a certain depth on the surface of the metal tube (P), and includes a rotating plate 21, a fixed piece 23 and a movable piece 25, a support wheel 24, and molding. Includes wheel 26.

The rotating plate 21 is a part that rotates according to the operation of the driving motor unit 50, which will be described later, and is coupled to the front portion of the housing unit 10. At this time, as shown in FIG. 2A, the rotating plate 21 is formed with a movable groove 213 having a certain width vertically upward from the central portion.

The fixed piece 23 is fixedly coupled to the lower central portion of the rotating plate 21, and the movable piece 25 is coupled to the movable groove 213 so as to be able to slide up and down. Reference numeral 211 denotes a mounting groove formed in the lower central portion of the rotating plate 21 for coupling the fixing piece 23.

The support wheel 24 is a part that stably supports the tube P when the forming wheel 26 is operated, and is made up of a pair of left and right wheels and is rotatably mounted on the fixing piece 23. Each of the support wheels 24 may have a cylindrical structure as shown in FIG. 3. The forming wheel 26 is a part that presses the surface of the tube P and directly forms a groove, and is rotatably mounted on the lower end of the movable piece 25. Reference numeral 261 is a forming blade.

Meanwhile, the present invention proposes a case where the tube detection unit 60 is provided as a means to determine whether the tube P is located at the exact intended point. The tube sensing unit 60 is characterized by including a tube resting end 61, an elastic means 63, and a contact sensor 67 as shown in FIG. 5A.

The tube resting end 61 is located on one side of the insertion groove 215 formed at a certain depth in the center of the rotating plate 21, and a tube contact surface 611 is provided on one surface, and a contact surface is provided on the other surface. A stage 613 is formed to protrude.

The contact sensor 67 is located and embedded in the other side of the insertion groove 215 of the rotating plate 21 at a certain distance from the contact end 613. The contact sensor 67 may be mounted on the rotating plate 21 via the buried stage 65 as shown in the drawing. The contact sensor 67 is connected to the control unit.

The elastic means 63 is located on the outer surface of the contact end 613 of the tube resting end 61. As the elastic means 63 is compressed or restored, the contact point between the contact end 613 and the contact sensor 67 is connected or released. When the contact end 613 and the contact sensor 67 are connected, the control unit determines that one end of the tube P has been inserted to the intended position and starts forming the tube P.

If the contact sensor 67 is mounted on the embedded end 65 as shown in the drawing, the elastic means 63 may be located along the outer surface of the guide ring 651 of the embedded end 65. In this way, the present invention makes it possible to form a groove in the tube through the contact sensor 67 and check whether the sleeping part has been inserted to the intended position, thereby fundamentally preventing the case where the tube P is formed with a groove in another part. It is possible to prevent it.

The hydraulic unit is a part that operates the tube forming unit and may include first and second hydraulic hoses 31 and 32, a cylinder 33, and a piston rod 35. The first and second hydraulic hoses 31 and 32 are located in the inner space of the housing part 10, their rear ends are installed penetrating the rear part of the housing part 10, and their front ends are installed through the housing part 10. ) extends to the anterior part of the

At this time, bearing parts (not shown) may be provided at each of the front and rear ends of the first and second hydraulic hoses 31 and 32 located at the front and rear of the housing 10, respectively. The bearing part allows the first and second hydraulic hoses to have independent configurations with respect to the rotational movement of the tube forming part (and the housing part). The rear ends of the first and second hydraulic hoses 31 and 32 are connected to a hydraulic pump (not shown).

The cylinder 33 is connected to the front end portion of each of the first and second hydraulic hoses 31 and 32. The cylinder 33 consists of a cylinder barrel 331 and a piston 333, and ports (not shown) formed on the left and right sides of the cylinder barrel 331 respectively connect the first and second hydraulic hoses 31 and 32. It is connected to each flow path (311, 321).

The lower part of the piston rod 35 is connected to the piston 333 of the cylinder 33, and the extended upper part is coupled to one rear part of the movable piece 25. Accordingly, when fluid is supplied through the first hydraulic hose 31, the movable piece 25 moves downward, and when fluid is supplied through the second hydraulic hose 32, the movable piece 25 moves upward. Return to original position.

The tube fixing part 40 is a part that restrains the tube P as a work object, and includes first and second gripping slides 44 and 45 located at the top and bottom, respectively, at a certain distance in front of the tube forming part 20. do. A first gripping surface 441 is formed on the lower surface of the first gripping slide 44, and a second gripping surface 451 is formed on the upper surface of the second gripping slide 45.

At this time, the tube fixing part 40 may be further provided with a support 41, a fixing plate 43, a movable fork 47, and a driving cylinder 49, as shown in FIG. 3A. The support 41 is located at a certain distance in front of the tube forming part 20, and its lower surface can be fixed to the support table 1.

The rear portion of the fixing plate 43 faces the front portion of the rotating plate 21, and its lower portion is fixed to the support 41. In the fixing plate 43, first and second cut grooves 431 and 433 are formed vertically upward and vertically downward, respectively, starting from the central portion. Each of the first and second cut grooves 431 and 433 may be configured to communicate with each other as shown in the drawing.

Each of the first and second gripping slides (44, 45) is slidably coupled to the first and second cut grooves (431, 433) of the fixing plate (43), and each of the first and second gripping slides (44, 45) First and second guide holes 443 and 453 are formed in the upper and lower portions, respectively. At this time, each of the first and second guide holes 443 and 453 has the characteristic of being inclined by θ and -θ as shown in the drawing.

The movable fork 47 is located in front of the fixed plate 43, and first and second forks 471 and 473 are provided on one side thereof. The first and second forks 471 and 473 are respectively inserted into the first and second guide holes 443 and 453 of the first and second gripping slides 44 and 45, respectively. The other side of the driving cylinder 49 is coupled to the upper side of the support 41, and the other side of the drive cylinder 49 is coupled to the other side of the movable fork 47.

When the driving cylinder 49 operates in one direction, each of the first and second forks 471 and 473 advances along the first and second guide holes 443 and 453, respectively, and thus the first and second grip slides ( 44, 45) each move vertically downward and vertically upward along the first and second incision grooves 431 and 433, respectively, and the first and second gripping surfaces 441 of the first and second gripping slides 44 and 45, respectively. , 451) restrains the tube (P).

If the driving cylinder 49 operates in the other direction, the first and second forks (471, 473) each retreat along the first and second guide holes (443, 453), respectively, and the first and second grip slides (44, 45) each moves vertically upward and vertically downward along the first and second incision grooves (431, 433) and returns to its original position, and the restraint state of the tube (P) is released.

The drive motor unit 50 is a part that rotates the tube forming unit 20 and is axially connected to the rear portion of the tube forming unit 20. Reference numeral 51 denotes a reducer including a drive shaft. 1 shows an example in which the housing unit 10 and the tube forming unit 20 rotate simultaneously when the driving motor unit 50 rotates. However, in contrast, only the tube forming unit 20 is rotated using a separate drive belt. You could also rotate it.

The schematic operating structure of the present invention consisting of this structure will be examined with reference to the attached drawings and the description of each of the above-mentioned structures.

First, one end of the tube P that needs to be worked is inserted while the tube fixing part 40 and the tube forming part 20 are in the same state as shown in FIGS. 3A and 2A, respectively. That is, each of the driving cylinder 49 and the driving motor unit 50 is stopped, and the tube P is inserted into the cylinder 33 while hydraulic pressure is supplied through the first hydraulic hose 31.

One end of the tube (P) sequentially passes through the central portions of the tube fixing part 40 and the tube forming part 20, and then comes into contact with the tube contact surface 611 of the tube resting end 61, as shown in FIG. 5A. It adheres closely. When the operator pushes the tube (P) further in one direction, the tube resting end 61 moves forward while compressing the elastic means 63, as shown in Figure 5b, and the contact end 613 of the tube resting end 61 comes into contact. It contacts the sensor (67).

When the contact end 613 comes into contact with the contact sensor 67 and the signal is transmitted to the control unit, the control unit operates the driving cylinder 49 in one direction. When the driving cylinder 49 operates in one direction, each of the first and second forks (471, 473) of the movable port (47) advances along the first and second guide holes (443, 453), respectively, While each of the two gripping slides (44, 45) moves vertically downward and vertically upward, the first and second gripping surfaces (441, 451) each restrain the tube (P), as shown in FIG. 3B.

When the tube P is restrained by each of the first and second gripping slides 44 and 45, the control unit transmits a control signal to supply fluid through the second hydraulic hose 32. When fluid is supplied through the second hydraulic hose 32, the piston rod 35 moves vertically downward, and accordingly, the movable piece 25 gradually moves downward, and the forming wheel 26 moves through the tube as shown in Figure 2b. It is closely attached to (P).

Thereafter, the forming blade 261 of the forming wheel 26 presses one surface of the tube P to a certain depth by fluid pressure supplied through the second hydraulic hose 32. After the forming wheel 26 is in close contact with the tube P, the extent to which additional fluid is supplied through the second hydraulic hose 32 will vary depending on the depth of the groove to be formed in the tube P. You can.

In this state, the control unit operates the driving motor unit 50. When the drive motor unit 50 is operated, the tube forming unit 20 rotates slowly (if configured as shown in FIG. 1, the housing unit and the tube forming unit rotate simultaneously). Since the other side of the tube (P) is stably restrained by the tube fixing part 40, when the tube forming part 20 rotates, the forming wheel 26 and the support wheel 24 each move with the movable piece 25. and the fixed piece 23, respectively, rotate passively.

Accordingly, a groove is naturally formed on the surface of the tube P to a depth determined by the forming blade 261. In the case of the present invention, a pair of left and right support wheels 24 and forming wheels 26 are in close contact with the tube P and face each other in a nearly vertical form with respect to the tube P interposed between them, When the forming blade 261 pressurizes a specific surface area of the tube (P), the pressing force transmitted to the tube (P) by the forming blade 261 is not dispersed and is stabilized by the support wheel 26 located on the opposite side. It is supported and provides improved forming force.

Of course, if the forming force itself is increased, grooves can be formed very easily on tubes (P) of a certain thickness or more. In addition, groove formation on the surface of the tube (P) is performed by the forming wheel (24) alone. Unlike the prior art, it is possible to accurately form a groove with a single pitch at the intended point.

When the forming of the tube P is completed, the operation of the drive motor unit 50 is stopped, and then the hydraulic unit is operated to supply fluid to the first hydraulic hose 31. When fluid is supplied to the first hydraulic hose 31, the piston rod 35 moves vertically upward and the movable piece 25 gradually rises upward and returns to its original position. Accordingly, the forming wheel 26 is separated from the tube P on which the groove forming has been completed, as shown in FIG. 2A.

Next, the control unit operates the driving cylinder 49 in the other direction. When the driving cylinder 49 operates in the other direction, the first and second forks 471 and 473 each retreat along the first and second guide holes 443 and 453, respectively, and the first and second grip slides 44 , 45) each moves vertically upward and vertically downward along the first and second incision grooves 431 and 433, respectively, and returns to its original position. Accordingly, the restraint state on the other side of the tube P is released.

When the restraint state of the tube (P) by the tube fixing part (40) is released, the tube resting end (61) retreats a certain distance by the restoring force of the elastic means (63) and returns to the original position as shown in Figure 5a, and the tube The contact point of the contact sensor 67 at the contact end 613 of the resting end 61 is released and the signal is transmitted to the control unit, and the operation of the groove forming system according to the present invention is completely terminated.

Although the description above is limited to preferred embodiments of the present invention, this is only an example, and the present invention is not limited thereto and can be modified and implemented in various ways, and further, separate technical features are provided based on the disclosed technical idea. It is obvious that it can be added and implemented.

10: housing part 20: tube forming part
21: rotating plate 23: fixed piece
24: support wheel 25: movable piece
26: forming wheel 31, 32: first and second hydraulic hoses
33: cylinder 35: piston rod
40: tube fixing part 41: support
43: Fixing plate 44, 45: 1st and 2nd paper slides
47: movable fork 49: driving cylinder
50: Drive motor unit 60: Tube detection unit
61: tube resting end 63: elastic means
67: Contact sensor P: Tube

Claims (3)

A housing portion (10) with a space of a certain size provided therein;
A rotating plate 21 is formed with a movable groove 213 vertically upward from the central portion and is coupled to the front portion of the housing portion 10. A pair of fixing pieces 23, left and right, are fixedly coupled to the lower side of the central portion of the rotating plate 21. It consists of a support wheel 24 rotatably mounted on the fixed piece 23, a movable piece 25 slidably coupled to the movable groove 213, and a movable piece 25 facing the support wheel 24. ) a tube forming unit (20) provided with a forming wheel (26) rotatably mounted on the lower portion of the tube;
The rear end portion is installed to penetrate the rear portion of the housing portion (10), and the front end portion is the first and second hydraulic hoses (31, 32) and the first and second hydraulic hoses (31) extending to the front portion of the housing portion (10). , 32) A cylinder 33 connected to each front end portion, the lower portion connected to the cylinder 33, and the extended upper portion provided with a piston rod 35 coupled to one rear portion of the movable piece 25. hydraulic part;
The first and second gripping slides (44, 45) are located at a certain distance in front of the tube forming part (20) at the top and bottom, and have first and second gripping surfaces (441, 451) formed on the lower and upper surfaces, respectively. Tube fixing part (40) provided with;
A drive motor unit 50 that is axially connected to the rear portion of the tube forming unit 20 and rotates the tube forming unit 20 when the metal tube P is fixed to the tube fixing unit 40.
A groove forming system for metal tubes including: According to paragraph 1,
Supports 41 are located at regular intervals in front of the tube forming part 20, the rear part faces the front part of the rotating plate 21, and starting from the central part, the first and second vertically upward and vertically downward, respectively. The lower part of the fixing plate 43 where the cut grooves 431 and 433 are formed is fixed to the support 41, and a first guide hole 443 inclined by θ is provided on the upper part of the first gripping slide 44. It is formed and slidably coupled to the first cut groove 431, and a second guide hole 453 inclined by -θ is formed on the lower part of the second grip slide 45 to form a second cut groove 433. A movable fork 47, which is slidably coupled to the first and second forks 471 and 473 inserted into the first and second guide holes 443 and 453, respectively, is provided on one side of the fixed plate 43. Located in, the other side is coupled to the upper side of the support 41, and one side is coupled to the other side of the movable fork 47, and is characterized by a drive cylinder 49 that moves the movable fork 47 forward and backward. A groove forming system for metal tubes. According to paragraph 1,
A tube detection unit 60 is provided in the insertion groove 215 of a certain depth formed in the center of the rotating plate 21, and the tube detection unit 60 is provided with a tube contact surface 611 on one side. A contact end 613 is formed protruding on the other surface, and a tube resting end 61 is located on one side of the insertion groove 215, and is located at a certain distance from the contact end 613, and the insertion groove ( It is characterized by consisting of a contact sensor 67 embedded in the other side of the contact end 615) and an elastic means 63 provided on the outer surface of the contact end 613 to control the contact point between the contact end 613 and the contact sensor 67. A groove forming system for metal tubes.

Images