KR20240000910A - Copper pipe automatic expansion and swaging device - Google Patents

Abstract

An automatic copper tube expansion and swaging device is disclosed. The automatic copper pipe expansion and swaging device according to the present invention performs expansion processing to expand the diameter of one end of the copper pipe, which is a workpiece, and swaging processing to reduce the diameter of the other end to the opposite direction, continuously and simultaneously in one device. This is intended to significantly reduce tact time and improve product mass production and work efficiency. It includes a movable processing machine frame placed on the floor, a copper pipe supply unit installed on one side of the processing machine frame to supply copper pipe, and a processing machine. an expansion molding part disposed at a distance on the side of the copper pipe supply part on the frame and expanding one end of the copper pipe supplied from the copper tube supply part, and an expansion molding part disposed at a distance on the side of the expansion molding part on the processing machine frame and one end of the expansion molding part The swaging forming section, which performs swaging processing to reduce the diameter of the other end of the expanded copper pipe, is placed at a distance from the upper part of the processing machine frame. The copper pipe supplied from the copper pipe supply section is used as the expanding pipe forming section, and the copper pipe expanded from the expanding pipe forming section is disposed at the upper part of the processing machine frame. It is characterized in that it includes a copper tube transfer unit that operates to simultaneously move the copper tube swaged from the swaging forming unit and the swaging forming unit to a collection bin.

Description

Copper pipe automatic expansion and swaging device}

The present invention relates to an automatic copper pipe expansion and swaging device, and in particular to an automatic copper pipe expansion and swaging operation in which expansion and axial pipe (swaging) operations on one end and the opposite end of a copper pipe, which is a workpiece, are performed continuously and simultaneously. It is about a swaging device.

The conventional coupling connection method used to connect two copper pipes of the same diameter requires not only fixing both ends of the copper pipes on the same line, but also welding them with the coupling accurately positioned at the joint. As this must be done, the work takes a lot of time, and if the joint between welds is not accurately fixed, there is a problem that defects occur in the welded area.

On the other hand, Tube Swaging, which connects two copper pipes of the same diameter without using a coupling, is a joint where the joints of two copper pipes that have been plasticized are fitted together and then soldered or brazed to join the joints. As a method, unlike the method using the coupling, it is mainly used because of the advantages of excellent airtightness of the joint and ease of operation because the joint is made into one.

For tube swaging as described above, which connects two copper pipes of the same diameter without using a coupling, one copper pipe must be connected so that the joints of each of the two copper pipes to be connected can be firmly and airtightly connected to each other. The joint must be expanded to a predetermined diameter, and the other copper pipe joint must be reduced to a diameter that can be accurately inserted into the expanded joint.

However, as the copper pipe expansion work for tube swaging and the swaging work to reversely reduce the diameter of the copper pipe are not linked to each other and are carried out as separate processes in dedicated equipment, work continuity and work efficiency are reduced, and tact time increases. Product productivity is low, and product damage frequently occurs due to careless handling during the process of moving expanded copper pipes for swaging treatment.

Republic of Korea Patent Publication No. 10-2022-0039453 (publication date 2022.03.29) Republic of Korea Patent Publication No. 10-2022-0039454 (publication date 2022.03.29)

The technical problem to be solved by the present invention is to provide automatic copper pipe expansion in which expansion and shaft pipe (swaging) processing of one end and the opposite end of a copper pipe, which is a workpiece, can be performed continuously and simultaneously in one device. and to provide a swaging device.

According to an embodiment of the present invention as a means of solving the problem,

A movable machine frame placed on the floor;

a copper pipe supply unit installed on one side of the processing machine frame to supply copper pipe;

an expansion forming part disposed at a distance from a side of the copper tube supply unit on the processing machine frame and expanding one end of the copper tube supplied from the copper tube supply unit;

a swaging forming unit disposed at a distance from a side of the expanding tube forming unit on the processing machine frame and performing swaging processing to reduce the diameter of the other end of the copper tube, one end of which is expanded in the expanding forming unit; and

It is arranged to be spaced apart from the upper part of the processing machine frame, and the copper pipe supplied from the copper pipe supply unit is transferred to the expansion tube forming unit, the copper tube expanded from the expansion forming unit is transferred to the swaging forming unit, and the copper tube swaged from the swaging forming unit is placed in a collection container. It includes a copper tube transfer unit that operates to move simultaneously to

The copper tube transfer unit is provided with a plurality of pincer-type grippers,

The plurality of claw-type grippers simultaneously lift different copper pipes at different positions, move them horizontally a predetermined distance, and then simultaneously lower the copper pipes at a predetermined target location.

Here, the copper pipe supply unit may be comprised of a hopper that accommodates copper pipes, which are workpieces, in an internal receiving space, and a work stand on which the copper pipes withdrawn one by one from the hopper are placed.

At this time, the upper surface of the work stand is inclined so that the copper pipe pulled out from the hopper can be stably moved to the designated waiting position, and a stopper is provided on the side so that the copper pipe coming down the inclined upper surface can stop exactly at the waiting position. can be formed.

In addition, the expansion molding unit applied to the present invention includes an expansion fixing unit for fixing the copper pipe supplied from the copper pipe supply unit by a gripper, and one end of the copper pipe disposed behind the expansion fixing unit and fixed by the expansion fixing unit. A tube expansion unit that expands the tube, a tube expansion unit disposed opposite the expansion unit with a tube expansion fixing unit in between, and a tube pushing unit that pushes the copper tube supplied to the expansion tube fixing unit in the direction of the expansion unit, and a tube expansion unit in the direction of the expansion unit by the expansion unit. It may include a positioning rod that limits the movement of the copper pipe being pushed out so that it can stop exactly at the designated expansion forming position.

Here, the expansion fixing unit includes a fixing chuck having a fixing groove formed in a shape corresponding to a part of the outer surface of the copper tube, a fixing groove formed in a shape corresponding to another part of the outer surface of the copper tube on a surface facing the fixing chuck, and a cylinder. It may be composed of a movable chuck that is connected and adheres to the fixed chuck according to the operation of the cylinder, thereby fixing the copper tube located between them.

And the expansion unit includes an expansion tool disposed on the same line as the copper tube fixed to the expansion fixing unit and expanding one end of the copper tube fixed to the expansion fixing unit, and a drive motor driven to rotate the expansion tool. , It may include an expansion cylinder driven to move the expansion tool toward the copper pipe fixed to the expansion fixing unit or to move it in a direction away from the copper pipe.

Here, the expansion tool may be composed of an expansion pin that rotates and enters the inside of the copper tube to expand one end of the copper tube, and a rotating body to which the expansion pin is coaxially coupled and rotates by the drive motor.

In addition, the swaging forming part applied to the present invention includes a swaging fixing unit that fixes the copper pipe supplied from the expanding tube forming part by a gripper, and a swaging fixing unit disposed in front of the swaging fixing unit and fixed by the expanding tube fixing unit. A swaging unit that swages and forms the other end of the copper pipe, and a swaging unit that is disposed opposite to the swaging unit with a swaging fixing unit in between, and pushes the copper pipe supplied to the swaging fixing unit in the direction of the swaging unit. It may include a pushing unit and a position adjustment rod that limits the movement of the copper pipe pushed in the direction of the swaging unit by the swaging pushing unit so that it can accurately stop at a determined swaging forming position.

At this time, the swaging fixing unit includes a fixing chuck having a fixing groove formed in a shape corresponding to a part of the outer surface of the copper tube, a fixing groove formed in a shape corresponding to another part of the outer surface of the copper tube on a surface facing the fixing chuck, and a cylinder. It may be composed of a movable chuck that is connected to and adheres to the fixed chuck according to the operation of the cylinder and fixes the copper tube located therebetween.

And the swaging unit includes a swaging tool disposed on the same line as the copper pipe fixed to the swaging fixing unit and performing swaging processing to reduce the diameter of the other end of the copper pipe fixed to the swaging fixing unit, It may include a swaging cylinder driven to move the swaging tool toward the copper pipe fixed to the swaging fixing unit or in a direction away from the copper pipe.

Here, the swaging tool has an inclined tapered surface whose diameter gradually decreases toward the rear at the center in the longitudinal direction, and a swaged processing groove in which a processing surface with a diameter smaller than the diameter of the copper pipe is formed at a certain length behind the tapered surface. Alternatively, it may be composed of a swaging die having a processing groove, and a movable body in which the swaging die is coaxially coupled and connected to the swaging cylinder.

In addition, the copper tube transfer unit applied to the present invention includes a first gripper of a clamp structure that moves the copper tube, which is a workpiece, from the copper tube supply unit to the expansion tube forming unit while reciprocating the section between the copper tube supply unit and the expansion tube forming unit, and the expansion tube forming unit; A second gripper having a clamp structure that moves the copper tube, one end of which has been expanded in the expansion molding section, to the swaging molding portion while reciprocating the section between the swaging molding portions, and reciprocating the section between the swaging molding portion and the collection container. A third gripper having a clamp structure that moves the copper pipe, the other end of which has been swaged from the swaging molding part, to the collection bin, and the first, second, and third grippers are simultaneously moved in the same direction for the same stroke distance. It may include cylinders that are actuated to move it.

Here, the first gripper, the second gripper, and the third gripper may be mounted at the same height at regular intervals on one movable member that moves in the horizontal direction along a horizontal moving rail, and the cylinders may be mounted within a predetermined stroke distance. It may be composed of two or more lifting cylinders that elevate the horizontal movable rail with respect to the horizontal support bar, and one horizontal movable cylinder that moves the movable member in the horizontal direction with respect to the horizontal movable rail within a predetermined stroke distance.

In addition, the distance between the work stand of the copper pipe supply section and the expansion fixing unit of the pipe expansion forming section is the same as the distance between the expansion fixing unit of the expansion forming section and the swaging fixing unit of the swaging forming section, and the grippers of the copper pipe transfer section are also located at the copper pipe supply section. Can be arranged to be spaced apart from each other in the horizontal direction by a distance corresponding to the distance between the work standby and the expansion fixing unit of the expansion molding part.

According to an embodiment of the present invention, the expansion and swaging processing of one end and the other opposite end of a copper pipe, which is a workpiece, are performed continuously and simultaneously in one device, so that work continuity and work efficiency can be greatly improved. .

In addition, as the expansion and swaging processing for one end and the opposite end of the copper pipe are performed continuously and simultaneously in one device, tact time can be greatly shortened, which can greatly improve product productivity.

In addition, since expansion and swaging processing is performed on one end of the copper pipe and the other end on the opposite side in one device, there is no need to move the copper pipe that has been expanded first as in the past to another location for secondary swaging processing. Damage to the product due to careless handling that may occur during such transportation can be prevented.

1 is a front view of an automatic copper pipe expansion and swaging device according to an embodiment of the present invention.
Figure 2 is a plan view from above of the automatic copper pipe expansion and swaging device shown in Figure 1.
FIG. 3 is a side view of the automatic copper pipe expansion and swaging device shown in FIG. 1 viewed from the direction of the copper pipe supply section.
Figure 4 is a schematic perspective view of a pipe supply unit constituting an automatic pipe expansion and swaging device according to an embodiment of the present invention.
Figure 5 is a plan schematic diagram of the tube expansion forming part applied to the automatic tube expansion and swaging device according to an embodiment of the present invention.
Figure 6 is a side schematic view of the expansion forming part of Figure 5.
Figure 7 is a perspective view of the main configuration of the expansion molding part.
Figure 8 is a schematic diagram of the operation sequentially showing the expansion forming process for one end of the copper pipe performed by the expansion forming unit as described above.
Figure 9 is a plan schematic diagram of the swaging forming part applied to the automatic pipe expansion and swaging device according to an embodiment of the present invention.
Figure 10 is a side schematic view of the swaged forming part of Figure 9;
Figure 11 is a perspective view of the main configuration of the swaging molding part.
Figure 12 is an operational schematic diagram sequentially showing the swaging forming process for the other end of the copper pipe performed by the swaging forming unit.
Figure 13 is a schematic view from the front of the copper pipe transfer unit applied to the automatic pipe expansion and swaging device according to an embodiment of the present invention.
Figure 14 is a schematic diagram of the operation of the copper tube conveying unit.

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

In describing the present invention, terms used in the following specification are only used to describe specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In addition, in this specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are intended to indicate the presence of one or more other It should be understood that this does not exclude in advance the presence or addition of features, numbers, steps, operations, components, parts, or combinations thereof.

Additionally, terms such as first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

In the description with reference to the accompanying drawings, identical components will be assigned the same drawing reference numerals, and overlapping descriptions thereof will be omitted. Also, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

Figure 1 is a front view of an automatic copper tube expansion and swaging device according to an embodiment of the present invention, and Figure 2 is a plan view looking down from above on the automatic copper tube expansion and swaging device shown in Figure 1. And FIG. 3 is a side view of the automatic copper pipe expansion and swaging device shown in FIG. 1 viewed from the direction of the copper pipe supply section.

Referring to Figures 1 to 3, the automatic copper pipe expansion and swaging device 1 according to an embodiment of the present invention performs expansion and swaging processing on one end and the other opposite end of a copper pipe (CP), which is a workpiece. It is a device configured to be performed continuously and simultaneously, and can be largely composed of a processing machine frame (10), a copper tube supply unit (20), an expansion forming unit (30), a swaging forming unit (40), and a copper tube conveying unit (50). there is.

The processing machine frame 10 may be configured to form a three-dimensional structure by interconnecting a plurality of horizontal bars and vertical bars with a square or circular cross-section, and is provided with a plurality of casters (symbols omitted) on the bottom so that it can be placed on the floor and moved. It can be. The copper pipe supply unit 20 that supplies copper pipe CP, which is a workpiece, may be installed on one side of the processing machine frame 10.

The copper tube supply unit 20 is connected to one upper side of the processing machine frame 10 through a dedicated mounting base (notation notation) and can be spaced at a predetermined height from the installation target surface. The copper tube supply unit 20 on the processing machine frame 10 ) The expansion molding part 30 may be placed at a distance from the side of the tube. This tube expansion forming unit 30 may be operated to expand one end of the copper tube CP supplied from the copper tube supply unit 20.

The swaging forming part 40 may be disposed at a distance from the side of the expanding tube forming part 30 on the processing machine frame 10. The swaging molding unit 40 receives a copper pipe (CP) whose one end is expanded from the expansion molding portion 30, and the diameter of the other end (opposite the expanded tube molded portion) is tightly inserted into the expanded molded portion to tightly couple it. Swaging molding is performed to reduce the diameter to the smallest possible size.

The copper tube (CP), which is a workpiece, may be moved by the copper tube transfer unit 50 in the following order: the copper tube supply unit 20, the expansion forming unit 30, and the swaging forming unit 40. During the movement, it can be molded into the desired shape by a series of processing performed in a certain order in the corresponding molding section (expanding molding section and swaging molding section), and the copper pipe (CP) with the final molding completed, i.e., the product, is the above-mentioned product. It can be finally moved to the collection bin 60 by the copper pipe transfer unit 50.

The copper tube transfer unit 50 is disposed at a predetermined distance apart from the upper part of the expansion forming part 30 and the swaging forming part 40 by at least two vertical support bars 12 connected to the top of the processing machine frame 10. The copper tube (CP) supplied from the copper tube supply unit 20 is supplied to the expansion forming unit 30, the copper tube (CP) expanded from the expansion forming unit 30 is transferred to the swaging forming unit 40, and the swaging It may be configured to simultaneously move the copper pipe (CP) swaged in the gong forming part 40 to the collection bin 60.

For this purpose, the copper tube transfer unit 50 may be provided with a plurality, preferably three, electric or pneumatic clamp type grippers 53, 54, 55 arranged at the same height and at a predetermined distance between each other, and a plurality of clamp type grippers 53, 54, 55. The grippers 53, 54, and 55 may be operated to simultaneously lift different copper pipes (CP) at different positions, move them horizontally a predetermined distance, and then simultaneously place the copper pipes (CP) at a predetermined target location.

Let's look at the configuration of each part of the automatic copper pipe expansion and swaging device according to an embodiment of the present invention in more detail.

Dongguan Supply Department

Figure 4 is a schematic perspective view of the pipe supply unit constituting the automatic pipe expansion and swaging device according to an embodiment of the present invention.

Referring to FIG. 4 and the preceding FIG. 1, the copper pipe supply unit 20 may be composed of a hopper 22 and a work stand 26. The hopper 22 can be installed on one upper side of the processing machine frame 10 through the dedicated mounting base mentioned above, and can accommodate a large number of copper pipes (CP), which are objects to be processed, in its internal accommodation space. The copper pipes CP accommodated in the hopper 22 may be pulled out one by one from the hopper 22 and placed in the designated waiting position P1 of the work stand 26.

The copper pipes (CP) can be pulled out one by one from the hopper 22 and placed on the work stand 26 by the lifting operation of the supply plate between the hopper 22 and the work stand 26. The upper surface 260 of the work standby 26 may be formed to be inclined so that the copper pipe (CP) drawn from the hopper 22 can be stably moved to the designated waiting position (P1), and the inclined upper surface may be formed on the side. A stopper 262 may be formed so that the copper pipe (CP) that has come down can stop exactly at the waiting position (P1).

Expansion molding part

Figure 5 is a plan schematic diagram of the tube expansion forming part applied to the automatic tube expansion and swaging device according to an embodiment of the present invention, and Figure 6 is a side schematic diagram of the tube expansion forming part of Figure 5. And Figure 7 is a perspective view of the main configuration of the expansion molding part.

Referring to Figures 5 to 7, the tube expansion forming unit 30 includes a tube expansion fixing unit 32 and an expansion unit 34. The expansion fixing unit 32 fixes the copper pipe (CP) supplied from the copper pipe supply unit 20 by a gripper so that it can be fixed at a designated forming position when forming a copper pipe (CP) by the expansion unit 34, The tube expansion unit 34 expands one end of the copper tube CP fixed by the expansion fixing unit 32 at the rear of the tube expansion fixing unit 32.

The expansion fixing unit 32 may be composed of a fixed chuck 320 and a movable chuck 324. A fixing groove 321 may be formed in the fixed chuck 320 in a shape corresponding to a portion of the outer surface of the copper pipe (CP), and a copper pipe (CP) may be formed on the surface of the movable chuck 324 facing the fixed chuck 320. A fixing groove 325 may be formed in a shape corresponding to another part of the outer surface. At this time, the movable chuck 324 comes into close contact with the fixed chuck 320 according to the operation of the cylinder 328, thereby firmly holding the copper pipe (CP) located between it.

The expansion unit 34 may be arranged at the rear of the expansion fixing unit 32 so that the center of the copper pipe (CP) fixed to the expansion fixing unit 32 and the center of the expansion tool 340 are located on the same line. there is. This expansion unit 34 includes an expansion tool 340 that operates to expand one end of the copper tube (CP) fixed to the expansion fixing unit 32, and a drive motor that is driven to rotate the expansion tool 340. (346), and may include an expansion cylinder 348 that advances or retracts the expansion tool 340.

The expansion tool 340 rotates and enters the inside of the copper pipe (CP) to expand one end of the copper pipe (CP), and the expansion pin 342 is coaxially coupled to the drive motor 346. It may be composed of a rotating body 344 that rotates, and the expansion pipe cylinder 348 moves in the direction of the copper pipe (CP) fixed to the expansion pipe fixing unit 32 or in a direction away from the copper pipe (CP) It can be driven to move to .

The tube expansion molding unit 30 may also include an expansion pushing unit 36 disposed to face the expansion unit 34 with the expansion fixing unit 32 interposed therebetween. The tube expansion pushing unit 36 has a seating plate 360 having a seating surface on which the other end of the copper pipe (CP) supplied to the expansion fixing unit 32 is placed, and is connected to the seating plate 360 to form a seating plate 360. It may include a pushing cylinder 362 that is operated to push the copper pipe (CP) on which the other end is placed in the direction of the expansion unit 34.

The copper pipe (CP) pushed in the direction of the expander unit (34) according to the operation of the expander pushing unit (36) can be stopped exactly at the expander forming position determined by the position adjustment rod (38). In other words, the positioning rod 38 functions as a kind of stopper that limits the movement of the copper pipe (CP) pushed in the direction of the expansion unit 34 by the expansion pushing unit 36 so that it can stop exactly at the predetermined expansion forming position.

The position adjustment rod 38 may be configured to move up and down between the expander fixing unit 32 and the expander unit 34 at a position spaced apart from the expander fixing unit 32 by a predetermined distance. This position adjustment rod 38 is raised by a position adjustment cylinder (not shown) operated according to sequence control and is located between the expansion fixing unit 32 and the expansion unit 34, thereby allowing the expansion by the expansion pushing unit 36. The movement of the copper pipe (CP) is limited to a certain distance.

In FIG. 7, reference numeral 329 denotes a copper tube support shaft installed so that the copper tube (CP) is accurately positioned at a designated height between the fixed chuck 320 and the movable chuck 324. This copper tube support shaft 329 has two chucks 320. Alternatively, one end may be fixed to one of the chucks (324), and the other end may be slide-coupled to a hole or groove (not shown) formed with a size and depth corresponding to the other chuck.

Figure 8 is a schematic diagram of the operation sequentially showing the expansion forming process for one end of the copper pipe performed by the expansion forming unit as described above.

Referring to FIG. 8, when the copper pipe (CP), which is a workpiece, is placed between the fixed chuck 320 and the movable chuck 324 of the expansion fixing unit 32 by the gripper 53, according to sequence control The position adjustment rod 38 rises, and the expansion pushing unit 36 operates with a slight time difference. As a result, the copper pipe (CP) is pushed toward the expansion unit (34). At this time, the copper pipe (CP) is pushed only to the predetermined expansion forming position by the positioning rod 38 (see Figure 8 (a)).

When the copper pipe (CP) reaches the predetermined pipe expansion forming position, the pipe expansion pushing unit 36 retreats to its original position, and the positioning rod 38 also descends to its original position. Then, the movable chuck 324 moves in the direction of the fixed chuck 320 according to the successive sequence control, so that the movable chuck 324 and the fixed chuck 320 come into close contact with each other. Because of this, the copper pipe CP can be firmly fixed in the form of engagement with the fixing groove 321 of the movable chuck 324 and the fixed chuck 320 (see (b) of FIG. 8).

When the copper pipe (CP) is fixed, the expansion tool 340 is rotated by the drive motor 346 of the expansion unit 34, and the expansion tool 340 moves in the direction of the copper pipe (CP) by operating the expansion cylinder 348. is moved to Accordingly, the expansion pin 342 of the expansion tool 340 rotates and enters the inside of one end of the copper pipe (CP), and as a result, a shape corresponding to the expansion pin 342 is formed from one end of the copper pipe (CP). A small deformation that expands occurs (see (c) of Figure 8).

8 (c), the expansion molding is carried out only for the set length, and then the drive motor 346 is stopped according to sequence control, and the expansion tool 340 retreats in the direction away from the copper pipe (CP) to its original position. will return to Afterwards, the movable chuck 324 is separated from the fixed chuck 320, thereby releasing the restraint on the copper pipe (CP), and in this state, the gripper 54 picks up the expanded copper pipe (CP) and moves it to the swaging forming part 40. Move it (see (d) in Figure 8).

Swaging forming part

Figure 9 is a plan schematic diagram of the swaging forming part applied to the automatic pipe expansion and swaging device according to an embodiment of the present invention, and Figure 10 is a side schematic diagram of the swaging forming part of Figure 9. And Figure 11 is a perspective view of the main configuration of the swaging molding part.

9 to 11, the swaging forming part 40 includes a swaging fixing unit 42 and a swaging unit 44. The swaging fixing unit 42 fixes the copper pipe (CP) supplied from the expansion molding unit 30 by a gripper so that it can be fixed at a given molding position, and the swaging unit 44 is a swaging fixing unit ( The other end of the copper pipe (CP) fixed by the swaging fixing unit 42 is swaged in front of 42).

The swaging fixing unit 42 may be composed of a fixed chuck 420 and a movable chuck 424. A fixing groove 421 may be formed in the fixed chuck 420 in a shape corresponding to a portion of the outer surface of the copper pipe (CP), and the copper pipe (CP) may be formed on the surface of the movable chuck 4324 facing the fixed chuck 420. A fixing groove 421 may be formed in a shape corresponding to another part of the outer surface. At this time, the movable chuck 324 comes into close contact with the fixed chuck 320 according to the operation of the cylinder 428, thereby firmly holding the copper pipe (CP) located between it.

The swaging unit 44 is disposed in front of the swaging fixing unit 42 so that the center of the copper pipe (CP) fixed to the swaging fixing unit 42 and the center of the swaging tool 440 are located on the same line. It can be. The swaging unit 44 advances the swaging tool 440, which performs swaging processing to reduce the diameter of the other end of the copper pipe (CP) fixed to the swaging fixing unit 42, and the swaging tool 440. Alternatively, it may include a swaging cylinder 448 that retracts.

The swaging tool 440 may be composed of a swaging die 442 and a movable body 444. The swaging die 442 is formed with an inclined tapered surface 443a whose diameter gradually decreases from the entrance to the rear, and a processing surface 443b with a diameter smaller than the diameter of the copper pipe (CP) is formed at the rear of the tapered surface. A swaging hole 443 formed with a certain length may be formed. And the swaging dice 442 may be coaxially coupled to the movable body 444.

The movable body 444 may be connected to the swaging cylinder 448, and the swaging cylinder 448 moves the movable body 444 in the direction of the copper pipe (CP) fixed to the swaging fixing unit 42. It can be driven to move or move in a direction away from the copper pipe (CP).

The swaging molding unit 40 may also include a swaging pushing unit 46 disposed to face the swaging unit 44 with the swaging fixing unit 42 interposed therebetween. The swaging pushing unit 46 is connected to a seating plate 460 having a seating surface on which one end of the copper pipe (CP) supplied to the swaging fixing unit 42 is placed, and the seating plate 460 is connected to the seating plate 460. ) may include a pushing cylinder 462 that operates to push the copper pipe (CP) with one end placed on it in the direction of the swaging unit 44.

The copper pipe (CP) pushed in the direction of the swaging unit 44 according to the operation of the swaging pushing unit 46 can be accurately stopped at the swaging forming position determined by the positioning rod 48. In other words, the positioning rod 48 is a kind of stopper that limits the movement of the copper pipe (CP) pushed in the direction of the swaging unit 44 by the swaging pushing unit 46 so that it can stop exactly at the designated swaging forming position. It functions.

The position adjustment rod 48 may be configured to move up and down between the swaging fixing unit 42 and the swaging unit 44 at a position spaced apart from the swaging fixing unit 42 by a predetermined distance. The position adjustment rod 48 is raised by a position adjustment cylinder (not shown) operated according to sequence control and is positioned between the swaging fixing unit 42 and the swaging unit 44, thereby being attached to the swaging pushing unit 46. The movement of copper pipe (CP) is limited to a certain distance.

In FIGS. 9 and 10, reference numeral 446 indicates an ejector pin that moves linearly within the processing hole 443 of the swaging die 442. The ejector pin 446 advances at the retraction point of the swaging dice 442 (the point in time when the swaging tool retreats in the direction away from the copper tube) and moves the copper tube swaged and formed (diameter reduction processing) by the swaging dice 442. It serves to push (CP) out of the processing hole (443).

Here, the ejector pin 446 may be configured as a piston structure that advances in the opposite direction when the swaging tool 440 retreats due to pneumatic or hydraulic pressure, and the pneumatic or hydraulic pressure to advance and retract the ejector pin 446 of this piston structure. A pneumatic chamber or hydraulic chamber in which hydraulic pressure acts may be formed inside the movable body 444.

In FIG. 11, reference numeral 429 is a copper tube support shaft installed so that the copper tube (CP) is accurately positioned at a designated height between the fixed chuck 420 and the movable chuck 424. This copper tube support shaft 429 has two chucks 420. Alternatively, one end may be fixed to one of the chucks (424) and the other end may be slide-coupled to a hole or groove (not shown) formed with a size and depth corresponding to the other chuck.

Figure 12 shows the swaging forming process for the other end of the copper tube performed by the swaging forming unit as above, that is, the copper tube formed by the expanding tube forming unit with a length and diameter that can be inserted into the expanded tube at one end and tightly coupled. This is a schematic diagram showing the process of forming the other end in order.

Referring to FIG. 12, the copper pipe (CP) that has been primarily processed in the expansion forming unit 30 is moved from the expansion forming unit 30 to the swaging forming unit 40 by the gripper 54, and the swaging forming unit 40 It is placed between the fixed chuck 420 and the movable chuck 424 of (40). In this state, the positioning rod 38 rises according to sequence control, and the swaging pushing unit 46 operates with a slight time difference.

Accordingly, the copper pipe (CP) is pushed toward the swaging unit (44). At this time, since the position adjustment rod 48 is blocking the movement path of the copper pipe (CP) in front of the moving direction of the copper pipe (CP), the other end of the copper pipe (CP) pushed in the direction of the swaging unit 44 is located at the above position. The moment it touches the adjustment rod (48), the copper pipe (CP) can no longer move. That is, the copper pipe CP is pushed only to the swaging forming position determined by the position adjustment rod 48 (see (a) of FIG. 12).

When the copper pipe CP reaches the predetermined swaging forming position, the swaging pushing unit 46 retreats and returns to its original position, and the positioning rod 48 also descends to its original position. And the movable chuck 424 is moved according to the successive sequence control, so that the movable chuck 424 and the fixed chuck 420 come into close contact with each other, and as a result, the copper pipe (CP) is used to fix the movable chuck 424 and the fixed chuck 420. It can be firmly fixed in the form of engagement with the groove 421 (see (b) of FIG. 12).

When the copper pipe (CP) is fixed by the swaging fixing unit 42, the swaging tool 440 is moved in the direction of the copper pipe (CP) by the operation of the swaging cylinder 448 of the swaging unit 44, thereby moving the copper pipe (CP). The other end of the copper pipe (CP) is forcibly inserted into the swaging processing hole 443 of the swaging die 442, and is composed of an inclined tapered surface 443a and a processing surface 443b with a smaller diameter than the copper pipe (CP). It is plastically deformed into a shape corresponding to the swaging hole 443 (see (c) of FIG. 12).

Swaging molding as shown in (c) of Figure 12 is carried out only for the set length, and then the swaging tool 440 returns to its original position by the operation of the swaging cylinder 448 according to sequence control, and then the movable chuck 424 ) is separated from the fixed chuck 420, thereby releasing the restraint on the copper pipe (CP). And in this state, the gripper 55 picks up the swaged copper pipe (CP) and moves it to the collection bin 60 (see (d) in FIG. 12).

Here, when the swaging tool 440 returns to its original position (retreats in a direction away from the copper tube) by the operation of the swaging cylinder 448, the ejector pin 446 is swaged by the operation of the ejector cylinder 447. The copper pipe (CP) can be easily separated from the swaging die (442) by pushing the molded (diameter reduction processing) copper pipe (CP) out of the processing hole (433) of the swaging die (442).

The series of swaging operations on the copper pipe (CP) performed by the swaging forming unit 40 may be carried out simultaneously with the expansion operation of the copper pipe (CP) performed by the expansion forming unit 30 described above. That is, in the expansion molding section 30 on one side of the device, expansion work is performed on the copper pipe (CP), and at the same time, in the swaging molding section 40 on the other side of the device, swaging work is performed on another copper pipe (CP) that has completed expansion molding. This can be done.

Copper tube transfer section

Figure 13 is a schematic view from the front of the copper tube transfer unit applied to the automatic pipe expansion and swaging device according to an embodiment of the present invention, and Figure 14 is a schematic diagram of the operation of the copper tube transfer unit.

Referring to Figures 13 and 14, the copper tube transfer unit 50 includes three grippers (53, 54, 55) of an electric or pneumatic clamp structure, and simultaneously moves the three grippers (53, 54, 55) in a specific direction within a designated section. It includes cylinders 56 and 58 that move to.

The three grippers (53, 54, 55) are operated to retract or open at the same time to pick up or place three copper pipes (CP) at the same time, and the cylinders (56, 58) are operated by the three grippers (53, 54, 55). can be moved at the same time in the same direction by the same administrative distance.

The three grippers include a first gripper (53) that reciprocates between the copper tube supply unit (20) and the tube expansion forming unit (30) in the section between the copper tube supply unit (20) and the expansion forming unit (30), A second gripper 54 reciprocates between the expansion molding portion 30 and the swaging molding portion 40, and the swaging molding portion 40 and the collection container 60. It may be composed of a third gripper 55 that reciprocates between the swaging molding part 40 and the collection container 60.

The first gripper 53 moves the copper tube (CP), which is a workpiece, from the copper tube supply unit 20 to the expansion forming unit 30 while reciprocating the section between the copper tube supply unit 20 and the expansion forming unit 30, The second gripper 54 reciprocates the section between the expansion molding section 30 and the swaging molding section 40, and performs the swaging molding of the copper pipe (CP), one end of which has been expanded in the expansion molding section 30. Move to section 40.

And the third gripper 55 reciprocates the section between the swaging forming part 40 and the collection bin 60 disposed on the opposite side of the copper pipe supply part 20, and swages the other end of the swaging forming part 40. The molded copper pipe (CP) is moved to the collection container (60).

The first gripper 53, the second gripper 54, and the third gripper 55 are positioned at the same height at regular intervals on one movable member 52 that moves in the horizontal direction along the horizontal moving rail 51. It can be installed, and the cylinders include two or more lifting cylinders (56) that elevate the horizontal moving rail (51) relative to the horizontal support bar (14) within a set stroke distance, and the horizontal movement rail (51) within a set stroke distance. It may be composed of one horizontal moving cylinder 58 that moves the movable member 52 in the horizontal direction.

Here, the distance D1 between the work stand 26 of the copper pipe supply unit 20 and the expansion fixing unit 32 of the tube expansion forming part 30 and the expansion fixing unit 32 of the expansion forming part 30 The distance between the swaging fixing units 42 (D2) of the swaging molding unit 40 is the same, and the distances D3 and D4 between the grippers of the copper tube transfer unit 50 are also similar to the work of the copper tube supply unit 20. They may be arranged to be spaced apart from each other in the horizontal direction by a distance corresponding to the distance (D1, D2) between the standby stand 26 and the expansion tube fixing unit 32 of the expansion tube forming part 30.

In FIG. 13, reference numeral 59 is a guide member that guides the horizontal movable rail 51 to be stably raised and lowered with respect to the horizontal support bar 14. The guide member 59 is attached to the horizontal support bar 14. It may be composed of a guide tube 590 of a cylindrical structure, and a guide bar 592 whose end is connected to the horizontal moving rail 51 and a portion of which is inserted into the guide tube 590 and slides in the vertical direction. there is.

According to the embodiment of the present invention discussed above, starting from the supply of the copper pipe, which is the workpiece, a molding part for expansion and swaging molding of one end of the copper pipe and the other end of the opposite side is provided in one device, so that the copper pipe, which is the workpiece, is provided. Expansion and swaging processing for one end and the opposite end can be performed continuously and simultaneously in one device.

As a result, work continuity and work efficiency are improved, product productivity can be greatly improved by shortening the tact time, and the effort or work of moving the copper pipe that has been expanded first to another location for second swaging treatment is omitted. Therefore, manpower consumption can be reduced, and product damage due to careless handling, which may occur in the process of moving the primary processed copper pipe to another location for secondary processing, can be prevented.

In the above detailed description of the present invention, only special embodiments thereof have been described. However, it should be understood that the present invention is not limited to the particular form mentioned in the detailed description, but rather is understood to include all modifications, equivalents and substitutes within the spirit and scope of the present invention as defined by the appended claims. It has to be.

1: Automatic copper tube expansion and swaging device
10: Processing machine frame 12: Vertical support bar
14: horizontal support bar 20: copper pipe supply section
22: Hopper 24: Supply plate
26: work standby 30: expansion molding section
32: expansion fixing unit 34: expansion unit
36: Expansion fusing unit 38, 48: Position adjustment rod
40: Swaging molding part 42: Swaging fixing unit
44: Swaging unit 46: Swaging pushing unit
50: Copper pipe transfer unit 51: Horizontal moving rail
52: Movable member 53: First gripper
54: second gripper 55: third gripper
56: Elevating cylinder 28: Horizontal moving cylinder
59: Guide member 60: Recycle bin
320, 420: fixed chuck 324, 424: movable chuck
321, 325 421, 425: Fixing groove 328, 428: Cylinder
340: Expansion tool 342: Expansion pin
344: Rotating body 346: Drive motor
348: expansion cylinder 440: swaging tool
442: Swaging die 443: Swaging processing hole
444: Movable body 448: Swaging cylinder
CP: Copper tube P1: Standby position (Standing position for copper tube movement)

Claims (14)

A movable machine frame placed on the floor;
a copper pipe supply unit installed on one side of the processing machine frame to supply copper pipe;
an expansion forming part disposed at a distance from a side of the copper tube supply unit on the processing machine frame and expanding one end of the copper tube supplied from the copper tube supply unit;
a swaging forming unit disposed at a distance from a side of the expanding tube forming unit on the processing machine frame and performing swaging processing to reduce the diameter of the other end of the copper tube, one end of which is expanded in the expanding forming unit; and
It is arranged to be spaced apart from the upper part of the processing machine frame, and the copper pipe supplied from the copper pipe supply unit is transferred to the expansion tube forming unit, the copper tube expanded from the expansion forming unit is transferred to the swaging forming unit, and the copper tube swaged from the swaging forming unit is placed in a collection container. It includes a copper tube transfer unit that operates to move simultaneously,
The copper tube transfer unit is provided with a plurality of pincer-type grippers,
An automatic copper pipe expansion and swaging device in which the plurality of pincer-type grippers simultaneously lift different copper pipes at different positions, move them horizontally a predetermined distance, and then simultaneously lower the copper pipes at a predetermined target location.
According to claim 1,
The copper pipe supply department,
A hopper that accommodates copper pipes, which are processed objects, in an internal receiving space,
An automatic copper pipe expansion and swaging device consisting of a work stand on which the copper pipes withdrawn one by one from the hopper are placed.
According to claim 2,
The upper surface of the work stand is inclined so that the copper pipe pulled out from the hopper can be stably moved to the designated waiting position, and a stopper is formed on the side so that the copper pipe coming down the inclined upper surface can stop exactly at the waiting position. Automatic copper tube expansion and swaging device.
According to claim 1,
The expansion molding part is,
an expansion fixing unit that secures the copper pipe supplied from the copper pipe supply unit by a gripper;
an expansion unit disposed behind the expansion fixing unit to expand one end of the copper pipe fixed by the expansion fixing unit;
an expansion pushing unit disposed opposite the expansion unit with an expansion fixing unit in between, and pushing the copper pipe supplied to the expansion fixing unit in the direction of the expansion unit;
An automatic copper pipe expansion and swaging device including a positioning rod that limits the movement of the copper pipe pushed in the direction of the pipe expansion unit by the pipe expansion pushing unit so that it stops accurately at a predetermined pipe expansion forming position.
According to claim 4,
The expansion fixing unit is,
a fixing chuck having a fixing groove formed in a shape corresponding to a portion of the outer surface of the copper pipe;
A fixing groove is formed on the surface facing the fixing chuck in a shape corresponding to another part of the outer surface of the copper tube, and is connected to a cylinder and comes into close contact with the fixing chuck according to the operation of the cylinder to fix the copper tube located between them. Automatic copper pipe expansion and swaging device consisting of a movable chuck.
According to claim 4,
The expansion unit is,
an expansion tool disposed on the same line as the copper pipe fixed to the expansion fixing unit and expanding one end of the copper pipe fixed to the expansion fixing unit;
a drive motor driven to rotate the expansion tool;
An automatic copper tube expansion and swaging device comprising an expansion cylinder driven to move the expansion tool toward the copper tube fixed to the expansion fixing unit or to move it in a direction away from the copper tube.
According to claim 6,
The expansion tool is
An expansion pin that rotates and enters the inside of the copper pipe to expand one end of the copper pipe;
An automatic copper tube expansion and swaging device comprising a rotating body in which the expansion pin is coaxially coupled and rotates by the drive motor.
According to claim 1,
The swaging molding part,
a swaging fixing unit that fixes the copper pipe supplied from the expansion molding unit by a gripper;
a swaging unit disposed in front of the swaging fixing unit and swaging the other end of the copper pipe fixed by the expansion fixing unit;
a swaging pushing unit disposed opposite the swaging unit with a swaging fixing unit in between, and pushing the copper pipe supplied to the swaging fixing unit in the direction of the swaging unit;
An automatic copper pipe expansion and swaging device including a positioning rod that limits the movement of the copper pipe pushed in the direction of the swaging unit by the swaging pushing unit so that it stops accurately at a predetermined swaging forming position.
According to claim 8,
The swaging fixing unit is,
a fixing chuck having a fixing groove formed in a shape corresponding to a portion of the outer surface of the copper pipe;
A fixing groove is formed on the surface facing the fixing chuck in a shape corresponding to another part of the outer surface of the copper tube, and is connected to a cylinder and comes into close contact with the fixing chuck according to the operation of the cylinder to fix the copper tube located between them. Automatic copper pipe expansion and swaging device consisting of a movable chuck.
According to claim 8,
The swaging unit is,
A swaging tool disposed on the same line as the copper pipe fixed to the swaging fixing unit and performing swaging processing to reduce the diameter of the other end of the copper pipe fixed to the swaging fixing unit;
An automatic copper pipe expansion and swaging device including a swaging cylinder driven to move the swaging tool toward the copper pipe fixed to the swaging fixing unit or to move it in a direction away from the copper pipe.
According to claim 10,
The swaging tool is,
An inclined tapered surface whose diameter gradually decreases toward the rear is formed at the longitudinal center, and a swaging groove or a machining groove is formed at the rear of the tapered surface with a machining surface having a diameter smaller than the diameter of the copper pipe at a certain length. Swaging dice,
An automatic copper pipe expansion and swaging device comprising a movable body to which the swaging dice are coaxially coupled and connected to the swaging cylinder.
According to claim 1,
The copper tube transfer part,
A first gripper having a clamp structure that moves the copper tube, which is a workpiece, from the copper tube supply unit to the expansion tube forming unit while reciprocating the section between the copper tube supply unit and the tube expansion forming unit;
a second gripper having a clamp structure that moves the copper tube, one end of which has been expanded in the expansion molding portion, to the swaging molding portion while reciprocating a section between the expansion molding portion and the swaging molding portion;
A third gripper having a clamp structure that moves the copper pipe whose other end is swaged from the swaging molding portion to the trash can while reciprocating the section between the swaging molding portion and the trash can;
An automatic copper tube expansion and swaging device including cylinders operated to move the first gripper, second gripper, and third gripper simultaneously in the same direction and by the same stroke distance.
According to claim 12,
The first gripper, the second gripper, and the third gripper are mounted at the same height at a certain interval on one movable member that moves in the horizontal direction along a horizontal moving rail,
The cylinders are,
Two or more lifting cylinders that raise and lower the horizontal moving rail relative to the horizontal support bar within a specified stroke distance,
An automatic copper pipe expansion and swaging device consisting of a horizontal moving cylinder that moves the movable member in a horizontal direction relative to the horizontal moving rail within a specified stroke distance.
The method of claim 1 or 12,
The distance between the work stand of the copper pipe supply part and the expansion fixing unit of the tube expansion forming part is the same as the distance between the expansion fixing unit of the tube expansion forming part and the swaging fixing unit of the swaging forming part,
An automatic copper tube expansion and swaging device in which the grippers of the copper pipe transfer section are arranged to be spaced apart from each other in the horizontal direction by a distance corresponding to the distance between the work standby of the copper pipe supply section and the expansion fixing unit of the expander forming section.

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