KR200198966Y1 - Manufacture device of u-bend - Google Patents

Abstract

The present invention includes a supply means for automatically supplying a long tube with a small diameter, a fixing means for supplying the conveyed tube by a fixed and bending length, and a bending mold and a cutting means for bending and automatically cutting the tube. The present invention proposes a U-bend manufacturing apparatus which can prevent the folding phenomenon and can cut the cut surface smoothly.

Description

U bend manufacturing apparatus {MANUFACTURE DEVICE OF U-BEND}

The present invention relates to a tube for a radiator, and more particularly, to a U-bend manufacturing apparatus capable of making a U-bend by continuously bending and automatically cutting the tube.

In general, a radiator used in an air conditioner or a refrigerator includes a rod-type tube and a U-bend (U-bend) connected in a zigzag shape. Since the configuration and operation of the present invention is not directly related to the present invention, a detailed description thereof will be omitted.

On the other hand, the U-bend used in the radiator is manufactured by manual operation of a pair of rollers and an operator without any device, and preferably bent manually by the operator while inserting a tube between the rollers.

However, this bending operation has the disadvantage that if the tube is bent by hand due to the characteristics of copper (Cu, Cu) material, not only the rigidity of the tube is weak, but also the brittleness of the bending surface is strong, so that even a small impact is easily broken.

In the related art, since the U-bend is manufactured by hand, a folding phenomenon occurs in the curved surface, and the end of the U-bend is not smooth, and the operator has to grind the end with a separate grind.

Therefore, an object of the present invention for solving the problems as described above is to provide a U-bend manufacturing apparatus that can make a bend (U-bend) by continuously bending the tube and automatically cutting.

Another object of the present invention is to provide a U-bend manufacturing apparatus that can prevent the bending of the bending surface.

Another object of the present invention is to provide an apparatus capable of manufacturing all U-bends regardless of the bending angle.

The present invention according to the first check for achieving the object as described above is to be bent, the bracket and roller for guiding the material tube to be supplied; A tube fixing unit installed in front of the roller and configured to selectively fix or convey the tube; A tube clamp unit for fastening and fixing the tube transferred from the tube fixing unit; A bending die unit for bending a tube protruding from the tube clamp unit, the bending portion having a plurality of circumferential grooves formed along an outer circumferential surface thereof; A finger type mandrel moving forward / backward according to the driving force of the cylinder and inserted into each tube passing through the bending mold unit; A mandrel rotating unit comprising a pinion connected to the plate on which the mandrel is installed and a cylinder engaged with the pinion to rotate the plate by a predetermined angle; A stopper installed in the mandrel rotating unit and controlling a radius of rotation of the mandrel; A cutting blade installed on the other side of the mandrel rotating unit and automatically cutting the tube bent by the bending mold unit; It is proposed a U-bend manufacturing apparatus which is installed between the tube fixing unit and the roller, and is composed of a bend extraction unit for separating the bent / cut tube from the bending mold unit.

1 is a front view showing the configuration of a U-bend (U-bend) manufacturing apparatus according to an embodiment of the present invention.

2 is a plan view of the U-bend manufacturing apparatus shown in FIG.

3 is a plan view of the bend extraction unit shown in FIG.

4 is a cross-sectional view of 'A-A' showing a detailed configuration of the bend take-out unit.

5 is a plan view of the tube fixing unit shown in FIG.

6 is a cross-sectional view of 'B-B' showing a detailed configuration of the tube fixing unit.

7 is a plan view of the tube clamp unit shown in FIG.

8 is a cross-sectional view of the 'C-C' showing a detailed configuration of the tube clamp unit.

FIG. 9 is a perspective view illustrating main parts of the U-bend manufacturing apparatus shown in FIG. 1; FIG.

10a to 10c is a state diagram showing the operation of the U-bend manufacturing process according to an embodiment of the present invention in sequence.

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

10: bend extraction unit 32: tube fixing unit

56: tube clamping unit 71: mandrel rotating unit

90: mandrel 94: bending mold unit

98: tube guide unit 104: stopper

112: cutting blade 500: tube

600: iron core

Hereinafter, a detailed description of a preferred embodiment of the present invention will be described with reference to the accompanying drawings. In the following description of the reference numerals to the components of the drawings, it should be noted that the same reference numerals as much as possible even if displayed on different drawings. In addition, in describing the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to intention or custom of a user or a mold designer, and the definitions should be made based on the contents throughout the present specification.

First of all, the concept of the U-bend manufacturing apparatus proposed by the present invention is to provide a means for automatically supplying a long tube with a small diameter, a fixing means for supplying a fixed and bent length of the conveyed tube, and a bending and automatic tube. With a bending mold and a cutting means for cutting into, to prevent the bending of the bending surface and to propose a manufacturing apparatus that can smoothly cut the cutting surface.

According to an embodiment of the present invention, the configuration of the U-bend manufacturing apparatus proposed above is as shown in FIGS. Referring to FIGS. 1 and 2, the device to be implemented in the present invention is a winding roller (not shown) in which a tube material to be bent is wound and a die 118 in which all units for bending and cutting the tube are fixedly installed. It is composed. The upper end of the die 118 is provided with a bracket 116 for guiding the tube 500 supplied from the take-up roller, the front of the bracket 116 is engaged with the roller 114 up / down Installed to continue to guide the tube (500). A bend take-out unit 10 is installed at the front of the roller 114 to take out the bent U-bend while guiding the supplied tube 500. The configuration of the bend take-out unit 10 will be described later. It will be easily understood by the description of 3,4.

As shown in Figs. 3 and 4, the above-described bend take-out unit 10 includes an upper frame 16 and a lower frame 18, and a cylinder 12 for moving the frames 16 and 18 back and forth. It is composed. That is, a bracket 14 is installed at one end of the upper frame 10, and the bracket 14 is connected to the piston rod of the cylinder 12. Semicircular grooves are formed on the bottom of the upper frame 16 at regular intervals to the left and right while maintaining a predetermined interval. Also, the grooves of the upper frame 16 are also formed in the upper surface of the lower frame 18. It is formed to correspond to. At this time, the upper frame 16 and the lower frame 18 are fastened and fixed by a plurality of bolts, and thus the iron core hole 21a is formed in the contact surfaces of the upper and lower frames 16 and 18. On the other hand, the iron core hole (21a) of the rod type iron core 600 is fixedly installed, the iron core 600 serves to take out the U-bend toward the pedestal 100. Fixing bars 22 are fastened by bolts to both side ends of the bottom of the lower frame 18 assembled as described above, and the fixing bars 22 are fixed to the top surface of the base 24. At this time, the fluids 26 having grooves of '∩' are fastened by bolts at both ends of the bottom surface of the base 24, and the fluids 26 are connected to the guide rails 28 assembled by bolts to the die 30. Is inserted. Accordingly, the base 24 provided with the upper and lower frames 16 and 18 moves forward and backward along the guide rail 28 by the operation of the cylinder 12.

Meanwhile, the tube fixing unit 32 is fixedly installed at the front of the bend take-out unit 10 as shown in FIGS. 1 and 2, and the tube fixing unit 32 fixes the tube 500 to be supplied. And also serves to move the tube 500 forward. That is, as shown in FIGS. 5 and 6, the aforementioned tube fixing unit 32 includes upper and lower frames 40 and 42, and an iron core for penetrating the iron cores 600 in the center of the upper frame 40. The holes 21b are formed while maintaining a constant gap. In addition, semi-circular grooves are regularly formed on the bottom of the upper frame 40, and semi-circular grooves are also formed on the top surface of the lower frame 42 while maintaining a predetermined interval. In addition, fixing bars 44 are fastened by bolts at both ends of the bottom surface of the upper frame 40, and the fixing bars 44 are integrally assembled with the base 46 by the bolts. At this time, the above-described lower frame 42 is positioned between the fixing bar 44, the piston 50 of the cylinder 48 is assembled on the bottom of the lower frame 42, and thus the lower frame 42 is a cylinder In accordance with the operation of 48, the tube hole 20b is formed while moving up and down. That is, when the lower frame 42 moves upward and contacts the upper frame 40 by the operation of the cylinder 48, a tube hole 20b is formed in the contact surface. On the other hand, at one end of the base 46 described above, the bracket 38 is assembled by bolts, and the bracket 38 is assembled to the piston rod of the cylinder 36. At this time, the cylinder 36 serves to move the base 46 back and forth. A fluid 47 having grooves of '∩' is fastened to bolts at both ends of the bottom surface of the base 46, and the fluid 47 is attached to the guide rails 54 bolted to the die 30. Is inserted.

A tube guide unit 98 is installed in front of the tube fixing unit 32 having the above configuration, and the tube guide unit 98 simply has an iron core hole and a tube for guiding the iron core 600 and the tube 500. It has a hole (not shown). In front of the tube guide unit 98, a tube clamp unit 56 is installed to fix the supplied tube 500 to the front, leaving only a predetermined length. The configuration of the tube clamp unit 56 is shown in FIG. Will be easily understood by 8,

As illustrated in FIG. 7 and 8, the upper and lower frames 58 and 60 are formed. In the center of the upper frame 58, the iron core holes 21c for penetrating the iron cores 600 are maintained at regular intervals. Is formed. In addition, semi-circular grooves are regularly formed on the bottom of the upper frame 58, and semi-circular grooves are also formed on the upper surface of the lower frame 60 while maintaining a predetermined interval. In addition, fixing bars 64 are fastened by bolts at both ends of the bottom surface of the upper frame 58, and the fixing bars 64 are integrally assembled with the base 66 by the bolts. In addition, the piston 70 of the cylinder 68 is assembled to the bottom of the lower frame 60 described above, and the lower frame 60 moves the tube hole 20c while moving up and down according to the operation of the cylinder 68. To form.

On the other hand, in the front of the tube clamp unit 56 described above, a bending mold unit 94, a rotating unit 71, and a cutting unit for bending and automatically cutting the supplied tube 500 are installed. These units are the main components of the present invention, the configuration of which will be easily understood by the detailed description of FIG.

As shown in FIG. 9, the bending mold unit 94 is installed in front of the tube clamp unit 56 described above, and is generally formed in a cylindrical shape. That is, both side ends of the bending mold unit 94 are supported and fixed by the bracket 92, and iron core holes 21d for penetrating the iron core 600 are formed in the center while maintaining a predetermined interval. In addition, bending portions 96 having a predetermined depth, preferably cylindrical grooves, are formed regularly on the outer circumferential surface of the bending mold unit 94, and the tube 500 flows under the bending portion 96. do.

In addition, the mandrel 90 is installed on the top surface of the plate 88 in front of the above-described bending mold unit 94, preferably in the same number as the number of the bending parts 96. do. That is, the mandrel 90 is formed in the shape of a finger, and an end thereof is fixed to the plate 88. In this case, the mandrel 90 and the plate 88 maintain a predetermined gap. Meanwhile, the mandrel 90 described above has a curved surface 90a formed by rounding the bottom surface of the front end at a predetermined angle, preferably similar to the end of the finger, which is a tube 500 when performing a bending operation. This is to prevent the folding phenomenon and to have a constant radius of curvature. In addition, a passage 91 serving as an oil passage is formed at the inner center of the mandrel 90, and an end portion of the passage 91 is rounded upward. This is for the oil to be smoothly supplied to the inside of the tube 500 when the mandrel 90 is rotated by the rotating unit 71 to be described later to perform the bending operation. Here, in the mandrel 90 described above, preferably, the plate 88 is fastened and fixed at one end by a piston 106 and a bolt 84, as shown in FIG. 10A, and the piston 106 is filled with hydraulic pressure. It moves forward and backward along the inner wall of the cylinder 86. At this time, the bolt 84 serves as a stopper for controlling the moving distance of the front and rear of the mandrel (90).

On the other hand, the rotation unit 71 is composed of a cylinder (72) having a rack 76 installed therein, and a pinion (80) engaged with the rack (76) to receive a driving force. That is, the cylinder 72 is elongated in the up / down direction and fixedly installed by the bracket 74. At both ends of the pinion 80, a bearing case 78 into which a bearing (not shown) is inserted is assembled, and the bearing case 78 is provided with a plate 82. At this time, the plate 82 and the cylinder 86, to which the above-described mandrel 90 is assembled, are integrally fixed to the plate 82. This is to cause the rack 76 and the pinion 80 to rotate together by an angle, preferably in the range of 0 to 180 °, in accordance with the operation of the rack 76 and the tube 500 is made of U-bend. . At this time, a bolt type stopper 104 is fastened to the bracket 102 at one side of the plate 82, and the bracket 102 is fastened to the plate 82 by bolts. In addition, at a position corresponding to the bracket 102, preferably, the fixture 100 is fastened to the side of the tube guide unit 98 described above with a bolt, and the fixture 100 is the stopper 104 described above. And control the rotation range of the mandrel 90.

Finally, a cutting unit is installed on the opposite side of the above-described rotary unit 71, and in detail, a cylinder 110 is installed as shown in FIG. 2, and a shaft (not shown) is provided in the piston of the cylinder 110. Are assembled. In addition, a cutting blade 112 is installed on the shaft, and the cutting blade 112 automatically cuts the bent tube 500 while rotating while receiving the driving force of the aforementioned cylinder 110.

Hereinafter, the U-bend manufacturing method of the present invention configured as described above will be described in detail with reference to FIGS. 10A to 10C.

First, as shown in FIG. 2, the tube 500 supplied from the winding roller is guided while passing through the bracket 116 and the roller 114, and then passed through the tube hole 20a of the bend take-out unit 10. After passing between the upper frame 40 and the lower frame 42 of the tube fixing unit 32, after passing through the tube hole of the tube guide unit 98, it stops in front of the tube clamp unit 98. At this time, the lower frame 42 of the tube fixing unit 32 described above moves upward in accordance with the operation of the cylinder 48 to come into contact with the bottom surface of the upper frame 42, so that the tube 500 no longer moves forward. It stops.

Thereafter, the tube fixing unit 32 moves forward according to the operation of the cylinder 36, and at the same time, the tube 500 is disposed between the upper frame 58 and the lower frame 60 of the tube clamp unit 56. After passing, it is introduced under the bending mold unit 94 and protrudes near the mandrel 90. Subsequently, the lower frame 60 of the tube clamp unit 56 moves upwards in contact with the operation of the cylinder 68 to contact the bottom surface of the upper frame 58, whereby the tube 500 stops in place. At this time, the movement of the tube fixing unit 32 is naturally stopped, which will be apparent to those skilled in the art.

Thereafter, as shown in FIG. 10A, the piston 106 moves along the inner wall of the cylinder 86, which causes the mandrel 90 to move forward and at the same time oil is supplied along the passage 91 of the mandrel. do. Accordingly, the mandrel 90 is introduced into the tube 500, and at the same time, the operation of the piston 106 is stopped.

Next, as shown in FIG. 9 and FIG. 10B, the rack 76 installed inside the cylinder 72 moves downward, and the pinion 80 rotates clockwise. Accordingly, the mandrel 90 is rotated in the clockwise direction while being inserted into the inside of the tube 500, whereby the tube 500 is bent along the surface of the bending part 96. At this time, oil is continuously supplied to the inside of the tube 500. After the bending is completed, the mandrel 90 is reversed to the rear, and in detail, the tube 500 exits.

Thereafter, as shown in FIG. 10C, the rack 76 and the pinion 80 operate in the opposite directions to the above-described operation, and thus the mandrel 90 is rotated counterclockwise to return to the original position. . At this time, the mandrel 90 is moved forward according to the operation of the piston 106 to prevent the interference according to the next operation as much as possible. Next, the cutting blade 112 rotates at a high speed according to the operation of the cylinder 110 to cut the bent tube 500, and at the same time, the bend take-out unit 10 is advanced by the operation of the cylinder 12. . Accordingly, the cut tube 500 is preferably separated from the bending portion 96 by the iron core 600 and falls to the pedestal 108. Thereafter, the above operation is repeated repeatedly, whereby the U-bend is completed.

On the other hand, in the above detailed description of the present invention has been described with respect to specific embodiments, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the embodiments described, but should be determined by the equivalents of the utility model registration claims as well as the scope of the utility model registration claims to be described later.

As described above, the present invention can manufacture the U-bend by the automatic mechanism without depending on the manual operation of the operator, which can reduce the working time and the number of workers as much as possible and also reduce the production cost. have.

In particular, the present invention has the advantage that the bending of the bending surface does not occur, and also to ensure the rigidity of the U-bend to the maximum to prevent breakage due to brittleness. The smooth end of the U-bend also eliminates the need for grinding.

Claims (7)

In the U-bend manufacturing apparatus, A bracket 116 and a roller 114 for guiding the material tube to be supplied; A tube fixing unit (32) installed in front of the roller (114) for selectively fixing or conveying the tube; A tube clamp unit (56) for fastening and fixing the tube transferred from the tube fixing unit (32); A plurality of bending portions 96 having a circumferential groove shape are formed around the outer circumferential surface, and a bending mold unit 94 for bending the tube protruding from the tube clamp unit 56; A finger-type mandrel 90 moving forward / backward according to the driving force of the cylinder 86 and inserted into each of the tubes passing through the bending mold unit 94; It consists of a cylinder (72) having a pin (80) connected with the plate (88) on which the mandrel (90) is installed, and a rack (76) for engaging the pinion (80) to rotate the plate (88) by an angle. A mandrel rotating unit 71; A cutting blade 112 installed at the other side of the mandrel rotating unit 71 and automatically cutting the tube bent by the bending mold unit 94; U bend is installed between the tube fixing unit 32 and the roller 114, characterized in that it comprises a bend take-out unit 10 for separating the bent / cut tube from the bending mold unit 94 Manufacturing device. The apparatus of claim 1, further comprising a stopper (104) installed in the mandrel rotating unit (71) to control a radius of rotation of the mandrel (90). The method of claim 1 or 2, wherein the tube fixing unit 32, A plurality of iron core holes 21b spaced apart at predetermined intervals, and an upper frame 40 having semicircular grooves formed on a bottom thereof; Semi-circular grooves are formed on the upper surface, and the lower frame 42 is coupled to the upper frame 40 to form a tube hole 20b for fixing the respective tubes; A cylinder 48 fixed to the bottom of the lower frame 42 and moving the lower frame 42 up and down; Yu bend manufacturing apparatus, characterized in that the upper and lower frames (40, 42) and the bracket (38) is fixedly installed, and configured to move the frame (40, 42) to the front and rear cylinder (36). The tube clamp unit 56 according to claim 1 or 2, A plurality of iron core holes 21c spaced apart at predetermined intervals, and an upper frame 58 having semicircular grooves formed on a bottom thereof; Semi-circular grooves are formed on the upper surface, and the lower frame 60 is coupled to the upper frame 58 to form tube holes 20c for fixing the respective tubes; Yu bend manufacturing apparatus is fixed to the bottom of the lower frame (60), characterized in that consisting of a cylinder (68) for moving the lower frame (60) up and down. According to claim 1, wherein the bottom end of the mandrel 90 is formed with a curved rounded portion 90a rounded upwards, and an inner central portion is formed with a passage 91 serving as an oil supply line. Bend manufacturing apparatus. 6. The apparatus of claim 5, wherein an end portion of the passageway (91) is formed to be rounded upward for smooth oil supply into the tube when the mandrel (90) rotates. According to claim 1 or 2, wherein the bend take-out unit 10, An upper frame 16 having semicircular grooves formed on a bottom thereof; Semi-circular grooves are formed on the upper surface and have a tube hole 20a for guiding the supplied tube in the center thereof, and is combined with the upper frame 16 to push the cut tube from the bending mold unit 94. A lower frame 60 forming an iron core hole 21a to which the 600 is inserted and fixed; The upper and lower frames (16,18) and the bracket (14) is fixedly installed, characterized in that consisting of a cylinder (12) for moving the frame (16,18) back and forth.