KR20200002777U - Tube bending apparatus - Google Patents

Abstract

The present invention is to provide a tube bending device capable of preventing deformation and damage to the inner and outer portions of the tube to be bent during the bending process, and enabling high-speed bending to increase productivity. The present invention for this purpose includes a tube holding part for fixing and supporting the tube and a tube bending part for bending the tube, wherein the tube bending part includes a fixed mold having a first support groove on the outer circumferential surface of which one outer circumferential surface of the tube is contacted and supported. , A movable mold having a second support groove to which the other outer circumferential surface of the tube is contacted and supported, and is rotatably installed about a rotation axis coinciding with a center line of the fixed mold, and rotates the movable mold around the fixed mold. A rotating block, and installed to be movable in a radial direction of the fixed mold on the rotating block, and moving the moving mold toward the fixed mold so that the tube is contacted and supported between the first support groove and the second support groove. Including a pressure block, the moving mold is installed to be movable in a direction orthogonal to the radial direction of the fixed mold on the pressure block, and supported in contact with the second support groove when the rotation block for bending is rotated. Disclosed is a feature that rotates at an angular velocity slower than the angular velocity of the rotating block due to friction with the tube.

Description

Tube bending device {TUBE BENDING APPARATUS}

The present invention relates to a tube bending apparatus, and more particularly, to a tube bending apparatus capable of high-speed bending operation and preventing the inner and outer portions of the bent tube from being deformed and damaged.

Tubes or pipes can be used to transport fluids such as gas or liquid, and are widely used in living facilities or industrial facilities. Such a tube or pipe may be bent and used at various angles due to a change in direction or restrictions of a place to be installed.

In general, a tube bending device includes a fixed table for fixing and supporting a straight tube to be bent, and a bending die disposed on one side of the fixed table to bend the tube, and the bending die has an inner outer peripheral surface of the tube in close contact. It includes an inner die and an outer die to which the outer outer peripheral surface of the tube is in close contact.

That is, in a state in which the inner die and the outer die are in close contact with each other and the tube is clamped therebetween, the inner die is rotated about a central axis, and the outer die rotates with the inner die around the central axis of the inner die, thereby forming the tube. It will bend.

Since the tube clamped between the inner die and the outer die is bent while being pulled according to the rotation of the inner die and the outer die during the bending process, deformation or damage may occur in the bending portion.

For example, the inner portion of the bent tube may be contracted and wrinkles may occur, and the outer portion of the bent tube may be elongated so that the thickness of the tube may become thinner or damage such as scratches may occur.

As described above, the deformation occurring in the bent portion of the tube not only interferes with the flow of fluid flowing inside the tube, but also causes a problem that is easily damaged during use.

On the other hand, for a tube made of a material with excellent thermal conductivity, such as a tube used as a heat exchanger, a phenomenon in which the temperature of the bending portion increases during the bending process may occur. In this case, the temperature of the bending portion rises in proportion to the speed, and when the temperature in the bending portion rises relatively, there is a problem that the above-described deformation or damage reaches a more serious level during the bending process.

Republic of Korea Patent Publication No. 10-0658510 (announced on December 19, 2006)

The object of the present invention is to solve the conventional problem, the present invention can prevent the inner and outer portions of the bent tube from being deformed and damaged during the bending process, and high-speed bending is possible to increase productivity. To provide a tube bending device.

In order to achieve the object of the present invention as described above, the tube bending apparatus according to the present invention includes: a tube holding unit for fixing and supporting the tube; And a fixed mold disposed on one side of the tube holding part and having a first support groove on the outer circumferential surface of the tube holding part, and a moving mold provided with a second support groove on which the other outer circumferential surface of the tube is contacted and supported. And a tube bending unit configured to bend the tube while rotating the moving mold around the fixed mold while contacting the tube between the first support groove and the second support groove, and bending the tube. The unit includes: a rotation block that is rotatably installed about a rotation axis coinciding with a center line of the fixed mold and rotates the moving mold about the fixed mold; And a pressure block installed on the rotating block to be movable in a radial direction of the fixed mold and moving the moving mold toward the fixed mold so that the tube is contacted and supported between the first support groove and the second support groove. In this case, the moving mold is installed to be movable on the pressing block in a direction orthogonal to the radial direction of the fixed mold, and contact support with the second support groove when the rotation block for bending is rotated. It is characterized in that it rotates at an angular velocity slower than the angular velocity of the rotating block due to friction with the tube.

In this case, the first support groove may include a first receiving groove that is concave to accommodate a deformation of an outer peripheral surface region of one side of the tube to be bent, and the second support groove is a region of the other outer peripheral surface region of the tube to be bent. It may include a second receiving groove formed concave to accommodate the deformation.

In addition, the tube bending unit may further include an elastic member connecting the pressing block and the moving mold, and interlocking with the movement of the pressing block so that the moving mold is spaced apart from the tube and returns the moving mold to an initial position. have.

In addition, in the tube bending apparatus of the present invention, it may further include a tube transfer unit for repeatedly transferring the tube at predetermined intervals toward the tube holding unit and the tube bending unit.

In addition, in the tube bending apparatus of the present invention, the tube holding unit, a fixing clamp having a first seating groove in which the outer peripheral surface of one side of the tube is contacted and supported; A moving clamp installed to be movable toward the fixed clamp and having a second seating groove in which the other outer peripheral surface of the tube is contacted and supported; A spacer member disposed between the fixed clamp and the moving clamp to separate the moving clamp from the fixed clamp; And a holding driving part connected to the movable clamp and compressing the spacer member to bring the movable clamp closer toward the fixed clamp.

In addition, in the tube bending apparatus of the present invention, the inclination in contact with the lower outer circumferential surface of the tube is disposed on one side of the circumference of the fixed mold, so that the tube passing through the tube bending portion is formed in a polygonal coil shape having a predetermined pitch. It may further include a pitch adjustment unit provided with a guide.

The tube bending apparatus according to the present invention is configured to move the moving mold in a direction opposite to the stretching force generated in the outer portion of the tube during bending, so that the elongation force and frictional force generated in the outer portion of the bent tube may be canceled.

In addition, the tube bending apparatus according to the present invention can prevent a rapid increase in temperature at the bending portion of the tube by slowing the angular velocity of the moving mold than the rotating block, thereby enabling high-speed bending work.

In addition, the tube bending device according to the present invention includes a receiving groove for receiving and inducing deformation occurring in the inner and outer portions of the tube in the fixed mold and the moving mold, so that wrinkles occur in the inner portion where the tube is bent or the outer portion It can prevent the problem of becoming thinner.

In addition, the tube bending device according to the present invention can quickly and accurately perform repeated bending operations by quickly returning the position of the moving mold after bending.

1 is a plan view illustrating a bending device according to the present invention.
2 is a front exemplary view for explaining the tube transfer unit shown in FIG. 1.
3 is a front exemplary view for explaining the tube holding unit illustrated in FIG. 1.
4 is a front exemplary view for explaining the tube bending unit shown in FIG. 1.
5 is an enlarged view for explaining the first support groove and the second support groove of the tube bending portion according to the present invention.
6 is a view for explaining the coupling structure of the pressure block and the moving mold of the tube bending unit according to the present invention.
7 is a state diagram for explaining the operation process of the tube bending unit according to the present invention.
8 is a view for explaining the pitch adjustment unit according to the present invention.
9 is an exemplary view showing a tube manufactured through the tube bending device according to the present invention.

Hereinafter, preferred embodiments of the present invention in which the above-described problem to be solved may be realized in detail will be described with reference to the accompanying drawings. In describing the present embodiments, the same names and the same reference numerals are used for the same components, and additional descriptions thereof are omitted.

1 is a plan view illustrating a bending device according to the present invention, FIG. 2 is an exemplary front view for explaining the tube transfer unit shown in FIG. 1, and FIG. 3 is a diagram illustrating the tube holding unit shown in FIG. 1 It is an exemplary front view for, and FIG. 4 is a front exemplary view for explaining the tube bending part shown in FIG. 1.

The bending apparatus according to the present invention may include a table 100, a tube transfer unit 200, a tube holding unit 300, and a tube bending unit 400.

The table 100 may provide a working space in which the tube transfer unit 200, the tube holding unit 300, and the tube bending unit 400 are installed and the tube 10 is bent.

1 and 2, the tube transfer unit 200 is to transfer the straight tube 10 to be bent toward the tube bending unit 400, the transfer unit 210, the shuttle table 230, the fixing unit (250) may be included.

The transfer unit 210 linearly transfers the shuttle table 230 placed on the table 100, and may be set to have a predetermined driving stroke in advance, and within the set stroke range of the transfer unit 210, the shuttle table ( 230) is forward and backward, and can be reciprocated.

The transfer unit 210 may be applied to a linear transfer structure combining the ball screws 211, for example, a ball screw 211 disposed parallel to the straight tube 10 and rotatably installed on the table 100 ), a nut block 212 provided on the shuttle table 230 and screwed with the ball screw 211, and a transfer driving part 215 for rotating the ball screw 211. In addition, it includes a guide rail 213 installed on the table 100 in parallel with the ball screw 211, and a guide rail 214 provided on the shuttle table 230 and slidably coupled on the guide rail 213 can do.

The fixing unit 250 is installed on the shuttle table 230 to move in conjunction with the shuttle table 230 and may selectively fix and support the tube 10.

The fixing unit 250 is installed on the shuttle table 230 and may include a pair of clamps disposed on both sides with the tube 10 interposed therebetween.

Specifically, a first clamp 251 having a first fixing groove 251a that is installed to be movable in a direction orthogonal to the transport direction of the tube 10 and the outer peripheral surface of one side of the tube 10 is contacted and supported, and a first The second clamp 252 is installed to be movable in a direction perpendicular to the transport direction of the tube 10 so as to face the clamp 251 and has a second fixing groove 252a in which the other outer circumferential surface of the tube 10 is contacted and supported. It may include. In addition, a first clamp driving unit 253 for moving the first clamp 251 and a second clamp driving unit 254 for moving the second clamp 252 may be included. The first clamp driving unit 253 and the second clamp driving unit 254 may be pneumatic cylinders.

1 and 3, the tube holding unit 300 is disposed in front of the tube bending unit 400 and fixedly supports the tube 10 being bent, and the fixed clamp 310, the moving clamp 320, It may include a spacer member 330 and a holding driver 340.

The fixing clamp 310 may be provided with a first mounting groove 311 through which one outer peripheral surface of the tube 10 is contacted and supported.

The moving clamp 320 may be provided with a second seating groove 321 in which the other outer peripheral surface of the tube 10 is contacted and supported, and may be installed to be movable toward the fixed clamp 310 on the table 100.

The spacer member 330 may be a coil spring, and may be disposed in a tension state between the fixed clamp 310 and the moving clamp 320. The spacer member 330 may separate the moving clamp 320 from the fixed clamp 310 by a restoring force.

The fixing clamp 310 may be disposed side by side along the length direction of the tube 10 and the fixing mold 410 of the tube bending unit 400 to be described later. In other words, the fixing clamp 310 may be disposed on a tangent line at the rear of the fixing mold 410 along the length direction of the tube 10.

Accordingly, the tube 10 which is transferred linearly can be accurately seated in the first support groove 411 formed on the outer peripheral surface of the fixed mold 410.

Meanwhile, the tube 10 of various sizes or the fixed mold 410 having various sizes (diameters) according to the curvature condition of the bending portion may be used, and the position of the fixing clamp 310 according to the replacement of the fixed mold 410 Also needs to be adjusted together.

That is, the fixing unit 250 may further include a position adjusting means 350 for finely adjusting the position of the fixing clamp 310.

As the position adjusting means 350, the fixing clamp 310 may be installed to be movable toward the moving clamp 320 on the table 100, and at one end, an adjustment rod 352 having a threaded portion formed on the outer circumferential surface is provided. The adjustment rod 352 may be screwed while sequentially passing through the adjustment nut 353 and the reference block 351 coupled to the table 100.

Accordingly, the position of the fixing clamp 310 may be adjusted in a direction orthogonal to the transport direction of the tube 10 according to the degree of rotation of the adjustment nut 353.

1 and 4, the tube bending unit 400 is to bend the tube 10 to a substantially desired curvature, a fixed mold 410, a moving mold 460, a rotating block 420, a first A bending driving unit 430, a pressing block 440, and a second bending driving unit 450 may be included.

The fixed mold 410 may be fixedly coupled to the table 100, and a tube 10 fixedly supported by the tube holding part 300 may be disposed on a tangent line.

The fixed mold 410 forms an inner portion of the bent tube 10, and may form a cylindrical structure having a radius corresponding to the radius of the inner portion of the bent tube 10.

The fixed mold 410 may have a first support groove 411 on which one outer peripheral surface of the tube 10 is contacted and supported on the outer peripheral surface.

The first support groove 411 may be formed in a shape corresponding to a half sectional shape corresponding to half of the tube 10, and when the cross section of the tube 10 is circular, a semicircle corresponding to half of the tube 10 It can be formed into a shape.

Referring to FIG. 5, the first support groove 411 may be provided with a first receiving groove part 411a that is concave to accommodate deformation of the inner outer peripheral surface area of the tube 10 to be bent.

The first receiving groove part 411a may be formed in the center of the first support groove 411, and this may be a part where the most deformation occurs among the inner parts of the bent tube 10. That is, it may be a part where wrinkles are formed the most.

When the first support groove 411 is formed in a semicircular shape having a predetermined radius, the first receiving groove portion 411a may be formed in an arc shape having a radius smaller than the radius of the first support groove 411. .

The first receiving groove 411a accommodates an inner portion of the tube 10 that is contracted when the tube 10 is bent, thereby preventing wrinkles from occurring.

Specifically, when the tube 10 is bent, the outer peripheral surface of one side of the tube 10, that is, most of the inner portion contacts the first support groove 411, and the remaining portion of the inner portion where the most deformation occurs is the first The non-contact state is maintained by the receiving groove portion 411a. Therefore, when the tube 10 is bent, an inner portion to be contracted may protrude toward the first receiving groove portion 411a forming a non-contact state.

Accordingly, it is possible to prevent wrinkles from occurring in the inner portion of the bent tube 10, and it is possible to prevent the cross-sectional area of the bent portion from being reduced.

The moving mold 460 forms an outer portion of the bent tube 10, and may be formed to have a length perpendicular to the radial direction of the fixed mold 410.

The moving mold 460 may be provided with a second support groove 461 in which the outer portion of the tube 10, that is, the other outer peripheral surface, is contacted and supported.

The second support groove 461 may be formed in a shape corresponding to a half-sectional shape corresponding to half of the tube 10, and when the cross-section of the tube 10 is circular, a semicircle corresponding to half of the tube 10 It can be formed into a shape.

Referring to FIG. 5, the second support groove 461 may be provided with a second receiving groove portion 461a that is concave to accommodate the deformation of the outer peripheral surface area of the bent tube 10.

The second receiving groove 461a may be formed in the central portion of the second support groove 461, which may be a portion where the most deformation occurs among the outer portions of the bent tube 10.

When the second support groove 461 is formed in a semicircular shape having a predetermined radius, the second receiving groove portion 461a may be formed in an arc shape having a radius smaller than the radius of the second support groove 461 .

This second receiving groove 461a induces a deformation occurring in the outer portion of the tube 10 that is elongated when the tube 10 is bent and accommodates it inward, so that the thickness of the outer portion of the tube 10 to be bent is It can prevent thinning or shrinking.

In addition, the moving mold 460 may be provided with a first rail coupling portion 462 formed in a direction parallel to the first support groove 411, and a pressure block 440 is coupled to the first rail coupling portion 462 Can be.

The rotation block 420 is a member for rotating the moving mold 460 about the fixed mold 410, and may be rotatably installed around a rotation shaft 422 coinciding with the center line of the fixed mold 410. .

The rotation shaft 422 of the rotation block 420 may be installed to be rotatable on the table 100 so as to coincide with the center line of the fixed mold 410.

The rotation shaft 422 may be rotated by the first bending driving unit 430, and the first bending driving unit 430 may be a rotation motor.

The output shaft of the first bending driving unit 430 may be directly connected to the rotation shaft 422 of the rotation block 420 or may be connected through a power transmission means. As the power transmission means, pulleys and belts, sprockets and chains, reduction gear groups, etc. may be applied.

The rotation block 420 is a first position (A, FIG. 7) arranged in parallel with the tube 10 fixed to the tube holding part 300 and a second position (B, B, which is rotated around the fixed mold 410). 7) can be maintained, and can move reciprocally between the first position (A) and the second position (B).

The first position A may correspond to an initial position before bending, and the second position B may be a position at which bending is completed. The angle formed by the first position A and the second position B may be set in various ranges according to the bending angle of the tube 10. According to an embodiment, the rotation block 420 may be rotated 90 degrees, and accordingly, the tube 10 may be bent at an angle of 90 degrees.

The rotation block 420 may be provided with a third rail coupling portion 424 along a radial direction toward the rotation shaft 422, and a pressure block 440 may be coupled to the third rail coupling portion 424.

The pressing block 440 connects the rotating block 420 and the moving mold 460, and the fixed mold 410 so that the tube 10 is contacted and supported between the first support groove 411 and the second support groove 461. It is possible to move the moving mold 460 toward ). That is, it may be installed to be movable in the radial direction of the fixed mold 410 on the rotating block 420.

One end of the pressing block 440 may be provided with a second rail coupling portion 442 coupled with the first rail coupling portion 462 of the moving mold 460, and a third rail of the rotating block 420 at the other end A fourth rail coupling portion 444 coupled to the coupling portion 424 may be provided.

As a result, the moving mold 460 rotates from the first position (A, Fig. 7) to the second position (B, Fig. 7) while interlocking with the rotating block 420 that is rotated according to the operation of the first bending drive unit 430. In this bending operation, the pressure block 440 presses the tube 10 between the first support groove 411 and the second support groove 461 with a constant pressure according to the operation of the second bending driver 450. do.

At this time, since the movable mold 460 is installed to be movable on the pressure block 440 via the first rail coupling portion 462 and the second rail coupling portion 442, it is fixed during the bending operation of the tube 10 It may be moved in a tangential direction orthogonal to the radial direction of the mold 410.

That is, an extension force is generated in the outer portion of the tube 10 that is bent, and the moving mold 460 in contact with the outer portion of the tube 10 is rotated on the pressure block 440 due to friction with the tube 10. It slowly moves in the direction opposite to the rotation direction of 420 (see Fig. 7(b)).

In other words, the angular velocity of the moving mold 460 maintains a slow state compared to the angular velocity of the rotating block 420 during bending.

As described above, by making the angular velocity of the moving mold 460 slower than that of the rotating block 420, the elongation force generated in the outer portion of the bent tube 10 can be offset, and the thickness of the outer portion of the bent tube 10 is It can prevent thinning or shrinking deformation.

In addition, since the angular velocity of the moving mold 460 is slower than that of the rotating block 420, the frictional force between the moving mold 460 and the tube 10 can be canceled, so that an increase in temperature generated at the bending portion can be prevented.

6 is a view for explaining the coupling structure of the pressure block and the moving mold of the tube bending unit according to the present invention.

Referring to FIG. 6, the tube bending part 400 may include an elastic member 465 connecting the pressing block 440 and the moving mold 460.

The elastic member 465 may be applied as a coil spring, is disposed parallel to the first support groove 411, and one end is connected to the pressing block 440 and the other end may be connected to the moving mold 460.

As shown in Figure 7 (a), at the initial time of bending, the moving mold 460 can maintain the first position (A) together with the pressing block 440, as shown in Figure 7 (c) Likewise, when the bending is completed, the moving mold 460 may be shifted from the pressing block 440 maintaining the second position B and maintain the third position B".

As such, the elastic member 465 may allow uniform movement of the moving mold 460 that is moved on the pressing block 440 due to friction with the bent tube 10, and the pressing block 440 is It is possible to quickly return the moving mold 460 to the initial position while being separated from the tube 10.

When the elastic member 465 is bent, the moving distance of the moving mold 460 that is moved on the pressing block 440 is uniformly maintained, so that the bending portion of the tube can be uniformly formed.

In addition, the elastic member 465 quickly returns the moving mold 460 to the initial position on the pressing block 440 at the same time as the bending is completed, so that repeated bending operations can be performed more quickly.

Hereinafter, the operation of the tube bending device according to the present invention will be described.

First, referring to FIGS. 1 to 4, the fixing unit 250 fixes the tube 10 in a state in which the shuttle table 230 is moved backwards away from the tube holding part 300. That is, by operating the first clamp driving unit 253 and the second clamp driving unit 254 to move the first clamp 251 and the second clamp 252 to face each other, the first fixing groove 251a and the second fixing The tube 10 is fixed between the grooves 252a.

In this way, while the tube 10 is fixed to the fixing unit 250, the tube holding unit 300 maintains a state separated from the tube 10.

Thereafter, the transfer unit 210 is operated to transfer the tube 10 to the tube holding unit 300 by a predetermined distance. That is, as the ball screw 211 rotates in the forward direction in conjunction with the forward rotation of the transfer driving unit 215, the shuttle table 230 receives the guidance of the guide rail 213 and the guider 214 while receiving the tube holding unit ( 300). As a result, a portion of the tube 10 fixed to the fixing unit 250 passes through the tube holding part 300.

When the transfer of the tube 10 is completed, the tube holding part 300 fixes the tube 10. That is, by operating the holding drive unit 340, the moving clamp 320 moves closer to the fixed clamp 310, and the tube 10 is fixed between the first seating groove 311 and the second seating groove 321. do.

As such, while the tube 10 is fixed to the tube holding unit 300, the tube transfer unit 200 may be separated from the tube 10 and moved to an initial position. That is, as the ball screw 211 rotates in the reverse direction in conjunction with the rotation of the rotating motor in the reverse direction, the shuttle table 230 moves away from the tube holding part 300 by the same action and moves backward to the initial position.

In addition, while the tube 10 is fixed to the tube holding unit 300, the tube 10 may be bent through the tube bending unit 400.

In this way, the fixing unit 250 and the tube holding unit 300 of the tube transfer unit 200 can alternately fix and support the tube 10, and the transfer unit 210 of the tube transfer unit 200 has a preset interval The tube 10 can be repeatedly moved forward by (stroke).

Through this, the tube bending unit 400 may repeatedly perform bending of the tube 10.

Meanwhile, the tube 10 is fixedly supported by the tube holding unit 300 and bending is performed through the tube bending unit 400 at the same time.

First, by operating the second bending driver 450 to move the pressing block 440 toward the fixed mold 410, the first support groove 411 of the fixed mold 410 and the second support of the moving mold 460 The tube 10 is contacted and supported between the grooves 461.

Thereafter, the first bending driving unit 430 is operated to rotate the moving mold 460 around the fixed mold 410, and the tube 10 is bent.

Specifically, referring to FIG. 7 (b) (c), when the rotation block 420 is rotated around the rotation shaft 422 by operating the first bending drive unit 430, the pressing block 440 and the moving mold ( 460 is rotated in conjunction with the rotation block 420, and the moving mold 460 rotates on the pressing block 440 according to a reaction force opposite to the elongation force of the outer portion of the tube 10 that is bent during this rotation operation. It is moved in a direction opposite to the rotation direction of the block 420.

That is, as shown in Figure 7 (c), unlike the rotation block 420 and the pressing block 440 that maintains the second position (B) in the bending completed state, the moving mold 460 has a third position ( B").

As a result, the angular speed of the moving mold 460 is set slower than the angular speed of the rotating block 420.

In this way, the difference in angular velocity between the rotating block 420 and the moving mold 460 may cancel the elongation force generated at the outer portion of the bent tube 10.

In addition, the difference in angular velocity between the rotating block 420 and the moving mold 460 may prevent an increase in temperature occurring in the bent portion of the tube 10.

If the bending operation of the tube 10 is implemented at a high speed, since the temperature is increased at the bending portion of the tube 10, a lot of deformation may occur in proportion to the temperature increase of the bending portion.

However, by relatively slowing the angular velocity of the moving mold 460 in direct contact with the bending portion of the tube 10, the temperature at the bending portion of the tube 10 can be prevented from rising rapidly, and eventually the tube 10 Since it is possible to continuously maintain a low temperature at the bending portion of, the repeated bending operation of the tube 10 can be performed more quickly.

After the bending is completed, the second bending driving unit 450 is operated in reverse to separate the pressure block 440 to the tube 10 and the fixed mold 410 and return to the initial position.

At this time, the pressing block 440 is spaced apart from the tube 10 and the fixed mold 410 and the moving mold 460 is also returned to the initial position by the restoring force of the elastic member 465. That is, it returns to the second position B from the third position B" shown in FIG. 7C.

Thereafter, the first bending driving unit 430 is operated in reverse to return the rotation block 420 to the initial position, and the above-described bending operation may be continuously repeatedly performed.

As described above, the tube bending device according to the present invention is configured to move the moving mold 460 in a direction opposite to the elongation force generated in the outer part of the tube during bending, so that it is generated in the outer part of the tube 10 to be bent. It is possible to offset the elongation force and friction force, thereby preventing deformation such as thinning of the outer circumferential portion of the bent tube 10 or the occurrence of scratches.

In addition, the tube bending device according to the present invention can prevent a rapid increase in temperature at the bending portion of the tube 10 by slowing the angular velocity of the moving mold 460 than the rotating block 420, thereby preventing a high-speed bending operation. By making this possible, productivity can be improved.

In addition, the tube bending device according to the present invention includes a receiving groove for receiving and inducing deformation occurring in the inner and outer portions of the tube 10 in the fixed mold 410 and the moving mold 460, and the tube 10 It is possible to prevent deformation, such as wrinkles, from occurring in the inner part of the bend of the tube, and problems such as thinning of the thickness in the outer part of the tube.

In addition, the tube bending device according to the present invention uniformly maintains the moving distance of the moving mold 460 that moves in a direction opposite to the elongation force of the tube 10 through the elastic member 465 during the bending operation, The bending portion of the can be formed uniformly.

In addition, the tube bending device according to the present invention quickly restores the position of the moving mold 460 on the pressing block 440 at the same time as bending is completed through the elastic member 465, and then repeatedly performs the bending operation quickly. can do.

Meanwhile, FIG. 8 is a view for explaining a pitch adjustment unit according to the present invention, and FIG. 9 is an exemplary view showing a tube manufactured through a tube bending apparatus according to the present invention.

First, as shown in FIG. 9, by repeatedly performing the above-described bending operation, a tube 10 having a shape of a polygonal coil 10A having a predetermined pitch P may be manufactured.

The tube bending apparatus according to the present invention may further include a pitch adjustment unit 500 in order to manufacture the tube 10 having the shape of the polygonal coil 10A having such a predetermined pitch P.

As shown in FIG. 8, the pitch adjustment unit 500 may be disposed on one side of the circumference of the fixed mold 410, and may be installed on a fixed clamp 310 disposed on one side of the circumference of the fixed mold 410. have.

The pitch adjustment part 500 may be provided with an inclined guide part 501 that maintains a predetermined height from the first support groove 411 of the fixed mold 410.

The tube 10 passing through the tube bending unit 400 may be changed in direction as it is repeatedly bent, and in this direction changing process, it contacts the inclined guide unit 501 disposed on one side of the circumference of the fixed mold 410 Can be. As a result, the tube 10 may be formed to be inclined upward around the bending portion as at least a portion of the lower outer circumferential surface comes into contact with the inclined guide portion 501.

In this way, the tube 10 guided to the inclination guide 501 of the pitch adjustment unit 500 may be formed in a shape of a polygonal coil 10A having a predetermined pitch P, as shown in FIG. 9.

The pitch adjustment unit 500 may be selectively applied to any pitch adjustment unit 500 among a plurality of pitch adjustment units 500 having inclined guide units 501 of different heights, and accordingly, multiple coils 10A The pitch P of the tube 10 formed in a shape can be variously set.

As described above, a preferred embodiment of the present invention has been described with reference to the drawings, but those skilled in the art will variously modify the present invention within the scope not departing from the spirit and scope of the present invention described in the following claims. Can be modified or changed.

100: table
200: tube transfer unit
300: tube holding part
400: tube bending part
410: fixed mold
411: first support groove
420: rotating block
440: pressure block
460: moving mold
461: second support groove

Claims (5)

A tube holding part for fixing and supporting the tube; And
It is disposed on one side of the tube holding part, and has a fixed mold provided with a first support groove on the outer circumferential surface of the outer circumferential surface of the tube, and a moving mold provided with a second support groove contacting and supported with the other outer circumferential surface of the tube. And a tube bending part for bending the tube while rotating the moving mold around the fixed mold while contacting and supporting the tube between the first support groove and the second support groove, and
The tube bending part,
A rotation block that is rotatably installed about a rotation axis coinciding with a center line of the fixed mold and rotates the moving mold about the fixed mold; And
A pressing block installed to be movable in a radial direction of the fixed mold on the rotating block and moving the moving mold toward the fixed mold so that the tube is contacted and supported between the first support groove and the second support groove; Including more,
The moving mold,
It is installed to be movable on the pressure block in a direction orthogonal to the radial direction of the fixed mold, and when the rotation block for bending is rotated, due to friction with the tube supported in contact with the second support groove, the rotation block It rotates at an angular speed slower than the angular speed,
The first support groove includes a first receiving groove that is concave to accommodate deformation of an outer peripheral surface region of one side of the tube to be bent,
The second support groove, the tube bending apparatus, characterized in that it comprises a second receiving groove formed concave to accommodate the deformation of the outer peripheral surface area of the other side of the tube to be bent. The method of claim 1,
The tube bending part,
An elastic member connecting the pressing block and the moving mold, and interlocking with the movement of the pressing block to move the moving mold away from the tube and returning the moving mold to the initial position; tube bending, characterized in that it further comprises Device. The method of claim 1,
Tube bending apparatus further comprising a; tube transfer unit for repeatedly transferring the tube at a predetermined interval toward the tube holding unit. The method of claim 1,
The tube holding part,
A fixing clamp having a first seating groove through which one outer peripheral surface of the tube is contacted and supported;
A moving clamp installed to be movable toward the fixed clamp and having a second seating groove in which the other outer peripheral surface of the tube is contacted and supported;
A spacer member disposed between the fixed clamp and the moving clamp to separate the moving clamp from the fixed clamp; And
And a holding driving unit connected to the movable clamp and compressing the spacer member and bringing the movable clamp closer to the fixed clamp. The method of claim 4,
A pitch adjusting unit disposed on one side of the circumference of the fixed mold and having an inclined guide unit contacting the lower outer circumferential surface of the tube so that the tube passing through the tube bending unit is formed in a polygonal coil shape having a predetermined pitch; Tube bending device, characterized in that.

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