JP2007160353A - Multi-pipe caulking/fixing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-pipe caulking/fixing device capable of caulking and fixing a metal pipe of a double-pipe structure consisting of an outer pipe and an inner pipe in which the heat exchanger is excellently performed between the high-pressure refrigerant flowing in a pipe reaching an evaporator from a compressor of the refrigerating cycle of an air-conditioner for an automobile via a condenser and the low-pressure refrigerant flowing in a pipe reaching the compressor from the evaporator. <P>SOLUTION: The multi-pipe caulking and fixing device comprises a holding base plate 6 erected on a working table 5 while opening a notched part 4 for inlet/outlet continuous to an insertion part K of a pipe 1 having an outer pipe 2 and an inner pipe, a turnable displacement plate 8, and a caulking and fixing mechanism part 13 which is coaxially provided in an advancing/retracting manner in the radial direction by a quick-acting cylinder 9 and provided with a plurality of chuck claws 10A, 10B, 10C to 10F, driven cam rollers 11, etc., and guide pressing wall parts 12, etc. which are pressed by the driven cam rollers, turned while urging the pressure in the centripetal direction O to give the caulking force to the pipe. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a caulking and fixing device for multiple pipes, for example, a high-pressure refrigerant flowing in a pipe from a compressor of a refrigeration cycle provided in an automobile air conditioner to a evaporator through a condenser, and a pipe from an evaporator to the compressor. The present invention relates to an apparatus that is optimal for caulking and fixing a metal pipe having a double pipe structure composed of an outer pipe and an inner pipe that can perform heat exchange with a flowing low-pressure refrigerant.

  Conventionally, a multi-tube heat exchanger used as an EGR gas cooler for cooling an EGR gas (reflux exhaust gas) of an internal combustion engine, for example, has an inner tube, a middle tube, and an outer tube arranged concentrically with each other. The middle tube and the outer tube are connected to each other by overlapping the longitudinal ends of the middle tube with the inner tube so that the space between the inner tube and the middle tube becomes a sealed cooling medium passage. The space between the tube and the inner space of the inner tube serves as a body to be cooled, and the outer tube is partially formed by a bulging concave portion and a bulging convex portion that are in close contact with each other at two locations in the longitudinal direction of the middle tube. And a cooling medium communicating with the cooling medium passage at one of the overlapping parts. Connect the inlet pipe to the cooling medium discharge pipe that communicates with the cooling medium passage on the other side, and the overlapping part of the middle tube and outer tube is sandwiched from the front and back surfaces of the pipe at the connection part of each pipe. It is caulked and joined (for example, see Patent Document 1).

  In addition, conventionally, for example, a refrigeration cycle provided in an air conditioner for an automobile, for example, is a high-pressure liquid refrigerant or gas-liquid that exchanges heat with outside air by flowing a gas refrigerant composed of high-temperature and high-pressure gas compressed by a compressor through a condenser. Make a mixed refrigerant. Then, this high-pressure refrigerant is separated into gas and liquid in a subsequent liquid tank, and adiabatic expansion is performed with an expansion valve to obtain a low-temperature and low-pressure liquid refrigerant or gas-liquid mixed refrigerant. Thereafter, the low-pressure refrigerant is caused to flow through an evaporator in the vehicle and is cooled by heat exchange to become a low-pressure gas refrigerant. The low-pressure refrigerant was supplied again to the compressor to form one cycle.

  And recently, as a refrigeration cycle provided in an air conditioner for automobiles, an outer pipe having good thermal conductivity and an inner pipe inserted into the outer pipe are provided between an expansion valve provided in the car and an evaporator. A double pipe is piped, and one end of the inner pipe is connected to the liquid tank via the pipe, and the other end of the inner pipe is connected to the inlet of the expansion valve. Moreover, one end of the outer pipe is connected to the inlet of the compressor via the pipe, and the other end of the outer pipe is connected to the outlet of the evaporator, so that the high-pressure refrigerant discharged from the liquid tank and passing through the inner pipe and the evaporator Some refrigerants evaporate and exchange heat with the low-pressure refrigerant passing through the outer pipe to the compressor.

The refrigeration cycle provided in the air conditioner for automobiles having a double-pipe structure has the heat of the high-pressure refrigerant flowing through the small-diameter bellows or spiral inner pipe and the low-pressure refrigerant flowing through the large-diameter outer pipe. In order to improve the exchange efficiency, it is necessary to increase the heat transfer area, so that the outer tube and inner tube are made larger to bring the inner tube closer to the inner peripheral surface of the outer tube of the double tube structure, and the cross-sectional area is reduced. As a result, the flow resistance of the refrigerant is increased so that it does not become difficult to flow, and even in an engine room with a small installation area, the piping is made compact without being enlarged (for example, Patent Documents). 2).
JP 2004-69210 A JP 2004-306686 A

  However, in the conventional multi-tube heat exchanger described in Patent Document 1, in the connection portion of each pipe with respect to the overlapping portion of the middle tube and the outer tube, a cooling medium is inserted into a pipe insertion hole formed in advance in the overlapping portion. Since the middle tube and the outer tube are joined together by inserting the end portions of the introduction pipe and the cooling medium discharge pipe and then crimped, the outer tube with respect to the middle tube is joined. A superposition portion of the heat sink, a place where a pipe insertion hole for inserting a pipe end of the cooling medium introduction pipe and the cooling medium discharge pipe is inserted in the superposition portion, and the cooling medium introduction pipe and the cooling medium discharge in the pipe insertion hole Insert the end of the pipe and connect the middle tube and outer tube at the connection of each pipe. It is subject to structural restrictions that the mating part must be carried out at a place where the caulking process part where the part of the pipe is sandwiched from the front and back sides is coincident with each other. As for attachment accuracy, the outer tube, the middle tube, and the inner tube are all required high accuracy, and the yield is poor.

  In addition, as described above, the middle tube and the outer tube are connected by inserting the end portions of the cooling medium introduction pipe and the cooling medium discharge pipe into the pipe insertion holes of the overlapping portions provided in two places in the longitudinal direction, At the connection part of each pipe, the overlapping part of the middle tube and outer tube is sandwiched from the front and back with a part of the pipe and tightened together. Cooling medium introduction to the outer tube to the middle tube and to the middle tube and outer tube The connection between the pipe and the cooling medium discharge pipe is structurally fragile, and the connection must be brazed to compensate for the disadvantages of leaking gases and liquids. Since the number of processes is large and complicated, the production and assembly are inefficient.

  Furthermore, the tube to be processed formed by the outer tube, the middle tube, and the inner tube is not limited to be formed in a straight shape, and is formed in a curved tube bent in an arbitrary direction at an arbitrary plurality of locations. Some of the metal tube materials, tube diameter, tube thickness, and length of the tubes used to form these tubes differ in the processing elongation of the outer tube, middle tube, and inner tube. The conventional multi-tube heat exchanger described in Patent Document 1 is not suitable for fixing the outer tube, the middle tube, and the inner tube by caulking all over.

  The present invention has been made in view of the above problems, and whether the pipe to be processed is not limited to a straight line but is a curved pipe bent in an arbitrary direction, the work efficiency is high, and the manufacturing accuracy, processing accuracy, and assembly accuracy are high. This is a multi-tube that can be caulked and fixed quickly and reliably at a predetermined position with good yield and high yield, and can be caulked and fixed structurally without gas and liquid leaks, enabling mass production and reducing manufacturing costs. An object is to provide a caulking fixing device.

The invention according to claim 1 of the present invention provides
A multi-polymerization tube caulking fixing device for caulking the outer periphery of a predetermined position from the tube end of a multi-polymerization tube as a work tube having at least an outer tube and an inner tube inserted into the outer tube,
A holding base plate erected on the processing table by opening an inlet / outlet notch connected to the insertion space of the workpiece pipe on one side of the outer edge;
A rotation displacement plate that has a cutout portion that overlaps the inlet / outlet cutout portion and is held on the holding base plate in a rotatable manner after being overlapped;
A plurality of chuck claws that are concentrically provided on the holding base plate so as to be movable back and forth in the radial direction by the driving force of the quick-acting cylinder;
A passive cam roller mounted on the chuck claw,
A plurality of arc-shaped guide pushing walls that are rotated while urging a pressing force in the centripetal direction by being pressed against the outer periphery of the passive cam roller to apply a caulking force to the outer periphery of the pipe to be processed are concentric. And a caulking fixing mechanism provided on the head.

According to a second aspect of the present invention, in the first aspect, the caulking fixing mechanism is linked to the rotary displacement plate via an arm arranged in a tangential direction and attached to the holding base plate. Pressed hydraulic cylinder,
And a pulling-side hydraulic cylinder that forms a pair with the push-side hydraulic cylinder, and the guide pushing wall portion applies a caulking force to the workpiece pipe by acting in a couple direction with respect to the passive cam roller. And

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the outer tube of the work tube is arranged on an axis passing through a substantially central front portion of the insertion space portion on the work table. Front substantially U-shaped tube portion rear support frame portion capable of supporting the lower half portion, and an inner tube rear end provided near the rear of the tube portion rear support frame portion and capable of contacting the rear end of the inner tube A stopper mechanism portion, which is configured by a restriction plate portion and supports and positions the rear portion of each of the outer tube and the inner tube, is movably provided in the axial direction by a moving means.

  According to a fourth aspect of the present invention, in the third aspect, the moving means is a linear motor drive mechanism.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the pipe to be processed is an outer pipe made of a straight pipe, and an accordion-like shape inserted into the outer pipe. It is a double tube structure comprising the spiral inner tube, and the double tube is formed in a straight line or a curved tube bent in an arbitrary direction.

  Moreover, the invention according to claim 6 of the present invention is that, in any one of claims 1 to 5, the pipe to be processed has at least one pipe end and / or both pipe ends fixed by caulking. Features.

  According to the invention described in claim 1 of the present invention, the outer periphery of a predetermined position is caulked from the tube end of a multi-polymer tube as a work tube having at least an outer tube and an inner tube inserted into the outer tube. A holding base plate that is erected on a processing table by opening an inlet / outlet notch portion connected to an insertion space portion of a pipe to be processed on one side of an outer edge, and a caulking fixing device for a multi-polymer pipe to be processed, It has a notch that overlaps the inlet / outlet notch, and it can be moved back and forth in the radial direction by the driving force of the cylinder that rotates and holds on the holding base plate. A plurality of chuck claws provided concentrically on the holding base plate and gripping the workpiece tube, a passive cam roller mounted on the chuck claws, and a pressure contact with the outer periphery of the passive cam roller It is rotated while urging the pressing force in the centripetal direction to Since it is characterized by including a plurality of arc-shaped guide pushing wall portions that concentrically apply a caulking force to the outer periphery of the work tube, the work tube is not limited to a straight line, Whether it is a bent tube bent in an arbitrary direction, it is possible to quickly and surely fix it in place with high work efficiency, high efficiency, high manufacturing accuracy, processing accuracy, assembly accuracy and high yield. It is possible to perform caulking and fixing that is structurally robust with no gas leakage or liquid leakage, enabling mass production and reducing manufacturing costs.

  According to the invention of claim 2 of the present invention, the caulking fixing mechanism portion is linked to the rotational displacement plate via an arm arranged in a tangential direction and is attached to the holding base plate. A cylinder and a pulling-side hydraulic cylinder that is opposed to the push-side hydraulic cylinder, and the guide pushing wall portion acts in a couple direction with respect to the passive cam roller to apply a caulking force to the processing pipe. Therefore, when the pipe to be processed is gripped by a plurality of chuck claws, the cylinder and rod of the push-side hydraulic cylinder that forms the even number of the caulking fixing mechanism linked to the rotational displacement plate via the arm extends. However, when the cylinder and rod of the pulling hydraulic cylinder are reduced, the rotation displacement plate is rotated and displaced about the tube to be processed held by the plurality of chuck claws. Therefore, a plurality of arc-shaped guide pressing walls provided concentrically on the rotation displacement plate are rotated while urging the passive cam roller mounted on the chuck claw body in the centripetal direction. As a result, a caulking force is applied to the outer periphery of the work tube, and the work tube, for example, the outer tube and the inner tube are caulked and fixed with a large output by the push side hydraulic cylinder and the pull side hydraulic cylinder.

  According to the invention of claim 3 of the present invention, the lower half of the outer pipe of the pipe to be machined can be supported on an axis passing through the substantially front center of the insertion space on the machining table. A front U-shaped tube portion rear support frame portion and an inner tube rear end regulating plate portion provided near the rear of the tube portion rear support frame portion and capable of contacting the rear end of the inner tube. Since the stopper mechanism for supporting and positioning the rear part of each of the outer pipe and the inner pipe is provided by a moving means in the axial length direction, the pipe to be processed is linear. The material of the metal tube for forming the tube to be processed, the tube diameter, and the tube thickness For example, even when the outer tube of the work tube and the inner tube have different elongation rates due to machining, the entire length is caulked. The can, the outer tube and the inner tube fixed by caulking.

  According to the invention described in claim 4 of the present invention, the moving means is a linear motor drive mechanism. Therefore, even when the pipe to be processed is different in length, the stopper mechanism portion. The lower half of the outer pipe of the pipe to be processed is supported by the pipe rear support frame part by adjusting the pipe by moving it quickly and surely on the work table according to the pipe to be processed. The rear portion of the inner tube is supported by the rear end of the inner tube being brought into contact with the inner tube rear end regulating plate portion provided near the rear of the frame portion.

  According to the invention described in claim 5 of the present invention, the pipe to be processed includes an outer pipe made of a straight pipe and an accordion or spiral inner pipe inserted into the outer pipe. Since it is a double tube structure, the double tube is formed in a straight line or a curved tube bent in an arbitrary direction, so a double tube comprising an outer tube and an inner tube The pipe is fastened and fixed by caulking the outer periphery at a predetermined position from the pipe end.

  According to the invention described in claim 6 of the present invention, the pipe to be machined is characterized in that at least one pipe end and / or both ends are caulked and fixed. It is done quickly and reliably.

  Hereinafter, the best embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a front view showing a first embodiment of a multi-tube caulking fixing device according to the present invention, FIG. 2 is a side view of the multi-tube caulking fixing device according to the first embodiment, and FIG. 3 is a multi-tube according to the first embodiment. FIG. 4 is an enlarged front view, FIG. 5 is a view taken along the line AA in FIG. 4, FIG. 6 is a view taken along the line BB in FIG. 4, and FIG. FIG. 8 is an enlarged cross-sectional view of the chuck claw, and FIG. 9 is a cross-sectional view showing an example of a work tube that has been caulked and fixed in the first embodiment. .

  In Embodiment 1 shown in the drawing, a pipe end 1a of a multi-polymerization processing tube as a processing tube 1 having at least an outer tube 2 and a bellows-like or spiral inner tube 3 inserted into the outer tube 2. , 1b, a multi-polymer tube caulking fixing device that caulks a predetermined outer periphery, and an inlet / outlet notch portion 4 connected to the insertion space portion K of the tube 1 to be processed is opened on one side of the outer edge, on the processing table. 5 has a holding base plate 6 erected on 5 and a cutout portion 7 that overlaps with the inlet / outlet cutout portion 4. 8 and a plurality of chuck claws 10A, 10B, 10C, which are provided concentrically on the holding base plate 6 so as to be able to advance and retreat in the radial direction R by the driving force of the quick-acting cylinder 9, and grip the processed pipe 1. ..Installed on 10F and chuck claws 10A, 10B, 10C ... 10F .. 11 and the outer periphery of the passive cam rollers 11, 11... 11 are rotated while urging a pressing force in the centripetal direction O by being pressed against the outer periphery of the passive cam rollers 11, 11. A plurality of arc-shaped guide pressing wall portions 12, 12,... 12 for applying a caulking force to the outer periphery are provided and a caulking fixing mechanism portion 13 provided concentrically.

  In the first embodiment, the pipe to be processed 1 is a double pipe comprising an outer pipe 2 made of a straight pipe and an accordion or spiral inner pipe 3 inserted into the outer pipe 2 as shown in the figure. Although a structure in which a double pipe is formed in a straight line is shown in the figure, the pipe 1 to be processed is not limited to a straight pipe, but may be formed in a curved pipe bent in an arbitrary direction, for example. Good.

  Further, the pipe 1 to be processed may be fixed by caulking one of the pipe ends 1a and 1b, and may be fixed by caulking both the pipe ends 1a and 1b.

  The quick-acting cylinder 9 is used to enable the plurality of chuck claws 10A, 10B, 10C,... 10F to advance and retract in the radial direction R, so that the workpiece 1 can be gripped and released quickly and reliably. This is intended to improve the efficiency of the caulking and fixing work. For example, an air cylinder is used as the quick-acting cylinder 9.

  T is a protrusion that protrudes in the inner peripheral direction on the inner periphery of the chuck claws 10A, 10B, 10C... 10F, and this protrusion T is the tube end 1a of the tube 1 to be processed or the tube end. 1b / for fixing a predetermined position L from the tube end 1a and the tube end 1b.

  The caulking fixing mechanism 13 is attached to the base holding plate 6 while being linked to the rotational displacement plate 8 via the arms 14 and 14 'pivoted in the tangential directions S and S'. The push-side hydraulic cylinder 15A, and the pull-side hydraulic cylinder 15B that makes a pair with the push-side hydraulic cylinder 15A, and the guide pressing wall portions 12, 12,... 12 are the passive cam rollers 11, 11,. .., And the guide pressing wall portions 12, 12... 12 are pressed against the outer periphery of the passive cam rollers 11, 11. It is rotated while being biased to apply a caulking force to the outer periphery of the tube 1 to be processed.

  Reference numeral 12a denotes a guide slope provided at the tip of the guide pressing wall portions 12, 12,... 12, and the passive cam rollers 11, 11,. It is for smooth movement. As described above, the use of the push-side hydraulic cylinder 15A and the pull-side hydraulic cylinder 15B increases the speed and efficiency of the work by exerting a large output to fix the outer periphery of the pipe 1 to be processed. It is intended to be illustrated. l is the installation length of the guide pushing wall portion 12, and this installation length l takes into consideration the size of the pipe diameter r1 of the pipe 1 to be crimped or the material forming the pipe 1 to be processed. The installation length of the guide pushing wall portion 12 pressed against the outer periphery of the passive cam rollers 11, 11... 11 is adjusted.

  In addition, the lower half 2a of the outer tube 2 of the tube 1 to be processed can be supported on the processing table 5 on an axis X passing through the front center of the insertion space K. A front U-shaped tube portion rear support frame portion 16 for positioning the outer tube 2, and provided in the vicinity of the rear of the tube portion rear support frame portion 16 so as to be able to contact the rear end of the inner tube 3. And a stopper mechanism for supporting and positioning the rear portion of each of the outer tube 2 and the inner tube 3. The stopper mechanism portion is composed of an inner tube rear end regulating plate portion 17 for positioning the inner tube 3 with respect to the outer tube 2. 18 is provided so as to be movable by the moving means 19 in the axial direction X ′.

  Thus, the stopper mechanism portion 18 for positioning and supporting the rear portion of the tube 1 to be processed is provided with the tube portion rear support frame portion 6 capable of supporting the lower half portion 2a of the outer tube 2 and the rear portion of the inner tube 3. The two stopper means with the inner tube rear end regulating plate portion 17 for positioning the rear end of the outer tube 3 so as to be able to come into contact with the end are prepared because the outer tube 2 is fixed when the work tube 1 is fixed by caulking. The inner tube 3 and the inner tube 3 have different tube diameters, different materials, and when the bent tube 1 to be bent is bent several times in an arbitrary direction. This is to cope with a difference in elongation rate from the tube 3 and to firmly fix it.

  Further, the moving means 19 is a linear motor driving mechanism. The linear motor driving mechanism is, for example, a moving body 21 supported so as to be able to run on a rail 20 provided on the processing table 5, and the moving body 21. It is formed by a permanent magnet not shown in the fixed figure and a large number of linear coils not shown in the figure arranged side by side along the rail 20.

  Reference numeral 22 denotes detection means provided at a predetermined position along the rail 20, and the detection means 22 supports the rear portion of the pipe part that supports the rear part of the pipe 1 to be processed in accordance with the length of the pipe 1 to be processed. For detecting the installation position of the frame section 16, for example, there are a projector and a light receiver in the case of an optical type, and a limit switch etc. in the case of a magnetic type and further a mechanical contact type No limitation is imposed even if any one is used.

  Reference numeral 23 denotes a stopper mechanism portion 18 on the first half of the rail 20 on the processing table 5 in order to support the front portion of the processing tube 1 in cooperation with a stopper mechanism portion 18 that supports the rear portion of the processing tube 1. It is a tube portion front support frame portion provided to face the tube portion, and the tube portion front support frame portion 23 is formed in a substantially U shape in front to support the front portion of the outer tube 2.

  The first embodiment of the present invention has the above-described configuration. For example, a straight line including an outer tube 2 made of a metal tube and an accordion or spiral inner tube 3 made of a metal tube inserted into the outer tube 2. In order to caulk a predetermined outer periphery from the pipe ends 1a and 1b of the processed pipe 1 as a double pipe, first, on one side of the outer edge of the holding base plate 6 erected on the processing table 5 The processed tube 1 is inserted into the insertion space K from the opened inlet / outlet notch 4.

  Next, the rear portion of the processed tube 1 is positioned and supported by the stopper mechanism portion 18. For this purpose, the lower half 2a of the rear portion of the outer tube 2 of the tube 1 to be processed is supported by a substantially U-shaped tube portion rear supporting frame portion 16 in the front and provided near the rear of the tube portion rear supporting frame portion 16. The inner tube 3 is positioned with respect to the outer tube 2 by bringing the rear end of the inner tube 3 into contact with the inner tube trailing end regulating plate 17.

  Further, the front portion of the outer tube 2 of the tube 1 to be processed is supported by a tube portion front support frame portion 23 provided opposite to the stopper mechanism portion 18 in the first half of the rail 20 on the processing table 5. Thus, as described above, the rear portion of the tube 1 to be processed is positioned and supported by the stopper mechanism 18, and the front portion of the tube 1 to be processed is positioned and supported by the tube portion front support frame portion 23. At this time, the stopper mechanism 18 is quickly and surely moved along the rail 20 along the rail 20 by driving a linear drive mechanism as a moving means in accordance with the length of the tube 1 to be processed. Is adjusted by the stopper mechanism 18 so that the chuck claw bodies 10A, 10B, 10C, and 10D are moved from the tube end 1a or the tube end 1b behind the tube 1 to be processed. , 10E, 10F by adjusting the installation length L1 up to the ridge T projecting in the circumferential direction on the inner periphery of the workpiece tube 1 by the chuck claws 10A, 10B, 10C, 10D, 10E, 10F The caulking fixing position L from the tube end 1a or the tube end 1b is determined.

  Then, when the quick-acting cylinders 9, 9... 9 provided concentrically around the insertion space K in the holding base plate 6 are driven by operating a switch not shown in the drawing, 9, 9, and 9 cylinder rods are extended so that the machined pipe 1 is quickly and smoothly gripped from the periphery by the plurality of chuck claws 10A, 10B, 10C, 10D, 10E, and 10F.

  After that, when one of the tube ends 1a of the tube 1 to be processed is gripped from the periphery by the plurality of chuck claws 10A, 10B, 10C, 10D, 10E, 10F, the tangential direction S, S ' The push-side hydraulic cylinder 15A connected to the base holding plate 6 and the pull-side hydraulic cylinder 15B which is paired with the push-side hydraulic cylinder 15A are driven. Since the rotation displacement plate 8 rotates, the guide pushing wall portions 12, 12,... 12 of the caulking fixing mechanism portion 13 act in the couple direction with respect to the passive cam rollers 11, 11,. As described above, the guide pressing wall portions 12, 12... 12 are pressed against the outer periphery of the passive cam rollers 11, 11... 11 mounted on the chuck claws 10A, 10B, 10C, 10D, 10E, and 10F. By seeking The outer tube 2 of the tube 1 to be processed is swung to the inner tube 3 by caulking the outer periphery of the predetermined position L from the tube end 1a by being rotated in the central direction O while pushing the pressing force.

  At this time, in the overlapping portion of the outer tube 2 with respect to the inner tube 3, an installation location of a pipe insertion hole for inserting a pipe end of a cooling medium introduction pipe and a cooling medium discharge pipe (not shown in the figure), and the inside of this pipe insertion hole The pipe ends of the cooling medium introduction pipe and the cooling medium discharge pipe are inserted into the pipe, and the structural features such as the multi-tube heat exchanger described in Patent Document 1 are independent of the installation location of the connection portion of each pipe. Without being restricted, the outer tube 2 of the tube 1 to be processed can be caulked and fixed to the inner tube 3 from the tube end 1a to the entire outer periphery of the predetermined position L, resulting in a structurally robust finish. Moreover, according to the caulking and fixing device of the first embodiment, the manufacturing accuracy, processing accuracy, and assembly accuracy of the outer tube 2 and the inner tube 3 are not required to be high, and the yield is good. Since the number of production and assembly processes is large and complicated, the production and assembly can be performed efficiently.

  In addition, by selecting the size of the radius r2 of the passive cam rollers 11, 11,..., The guide pushing wall portions 12, 12... According to the tube diameter of the tube 1 to be processed (tube diameter r1 of the outer tube 2). The pressing amount in the centripetal direction O by 12 is appropriately determined. Further, the installation length l of the guide pushing wall portion 12 is determined by considering the size of the pipe diameter r1 of the work tube 1 to be caulked, or the material forming the work pipe 1, and the passive cam rollers 11, 11,. -The installation length of the guide pushing wall part 12 press-contacted to the outer periphery of 11 is adjusted.

  The extension of the cylinder rod of the push-side hydraulic cylinder 15A and the reduction of the pull-side hydraulic cylinder 15B are opposite corners when the work tube 1 is fixed by caulking, so that a large output is exerted and the caulking fixing operation is performed quickly and smoothly. It can be carried out.

  Further, the cylinder rods of the push-side hydraulic cylinder 15A and the pull-side hydraulic cylinder 15B of the caulking fixing mechanism portion 13 are restored to their previous positions, and one of the pipes 1 to be processed by the chuck claws 10A, 10B, 10C, 10D, 10E, and 10F. And the chuck claws 10A, 10B, 10C, 10D, 10E, and 10F are restored to their previous positions by the rotation of the rotational displacement plate 8, and are further provided concentrically. Chucking claw to the one pipe end 1a side of the processed pipe 1 by reducing the cylinder rods of a plurality of (six in FIG. 1 and FIG. 4) cylinders 9, 9... 9 in the radial direction R. Grasping by the bodies 10A, 10B, 10C, 10D, 10E, 10F is released. In this way, for example, the outer tube 2 made of a metal tube, and a linear double tube made of a bellows or spiral inner tube 3 made of a metal tube inserted into the outer tube 2 are covered. The outer periphery of the predetermined position L away from the tube end 1a of the processed tube 1 can be caulked and fixed.

  Thereafter, the processed tube 1 as a straight double tube comprising an outer tube 2 made of a metal tube and a bellows or spiral inner tube 3 made of a metal tube inserted into the outer tube 2. In order to fix the outer periphery of the predetermined position L away from the other pipe end 1b, the processed pipe 1 which has been released from gripping by the chuck claws 10A, 10B, 10C, 10D, 10E, 10F is used for the inlet / outlet. It is taken out from the insertion space K through the notch 4.

  Then, after the tube to be processed 1 is turned upside down, the tube to be processed 1 is again inserted into the insertion space K from the inlet / outlet cutout portion 4 with the other tube end 1b facing forward.

  Next, by repeating the same operation as described above, one pipe end 1a side of the rear portion of the tube 1 to be processed is supported by the stopper mechanism portion 18 for positioning, and the front portion of the tube 1 to be processed is forward of the tube portion. The bearing frame 23 is positioned and supported. Further, the quick-acting cylinders 9, 9... 9 are driven to grip the processed tube 1 quickly and smoothly from the surroundings by the plurality of chuck claws 10A, 10B, 10C, 10D, 10E, and 10F. Thereafter, the push-side hydraulic cylinder 15 and the pull-side hydraulic cylinder 15B are driven and the rotation displacement plate 8 is rotated, whereby the guide pressing wall portions 12, 12... 12 of the caulking fixing mechanism portion 13 are passive cam rollers. 11, 11... 11, and 11, 11, and 11. The outer periphery of the position L is caulked and fixed over the entire surface.

  In this way, for example, the outer tube 2 made of a metal tube, and a linear double tube made of a bellows or spiral inner tube 3 made of a metal tube inserted into the outer tube 2 are covered. A predetermined outer periphery can be caulked from the tube ends 1a and 1b of the processed tube 1.

  In the above description, the tube 1 to be processed as a multiple tube is formed in a straight line formed by an outer tube 2 and an inner tube 3 having a bellows shape or a spiral shape, and one tube end 1a and the other tube end 1a. The case where the tube end 1b is caulked and fixed has been described. However, the present invention is not limited to this, and the processed tube 1 includes the outer tube 2 and the inner tube 3 having a bellows shape or a spiral shape. Even in the tube 1 to be bent which is bent in an arbitrary direction, the tube 1 to be bent is bent into the insertion space K through the inlet / outlet cutout 4 provided on the outer edge side of the holding base plate 6. The tube 1 can be easily inserted and positioned, set, and one tube end 1a, 1b or / and both the tube ends 1a, 1b of the processed tube 1 can be fixed by caulking.

  Further, the pipe 1 to be processed is not limited to the double pipe structure composed of the outer pipe 2 and the inner pipe 3 as described above. For example, the inner pipe 3 further includes the innermost pipe (shown in the figure). In the case where the outer periphery of the predetermined position L is caulked and fixed from the pipe end of the pipe 1 to be processed having the three-pipe structure inserted, the caulking and fixing device of the present invention can be used for caulking.

  Furthermore, in Embodiment 1 described above, a pressing force is applied in the centripetal direction O by being pressed against the outer periphery of the passive cam rollers 11, 11,... In order to drive the rotational displacement plate 8 provided with the guide pushing wall portions 12, 12... 12 rotated while being biased in the couple direction, a push-side hydraulic cylinder 15 A is provided in the tangential direction S and the tangential direction S is provided. By providing the pulling side hydraulic cylinder 15B at the position ', the rotation displacement plate 8 is rotated by the couple of the pulling force of the pulling side hydraulic cylinder 15B and the pulling force of the pulling side hydraulic cylinder 15B. It is also within the scope of the present invention that the rotational displacement plate 8 is rotated by providing the push-side hydraulic cylinder symmetrically without causing the pressing force of the push-side hydraulic cylinder to be even.

  In the present invention, the pipe to be processed is not limited to a straight line, and even if it is a curved pipe bent in an arbitrary direction, the work efficiency is high, the efficiency is high, and the manufacturing accuracy, processing accuracy, and assembly accuracy are high, and the yield is high. It is suitable for fields and applications where caulking can be fixed quickly and reliably at a predetermined position, and caulking can be structurally robust without gas or liquid leakage, enabling mass production and reducing manufacturing costs.

FIG. 1 is a front view showing Embodiment 1 of a multi-tube caulking fixing device of the present invention. FIG. 2 is a side view of the multiple tube caulking fixing device of the first embodiment. 3 is also a plan view of the multiple tube caulking fixing device of the first embodiment. FIG. 4 is an enlarged front view of the same. FIG. 5 is an AA arrow view of FIG. FIG. 6 is a view taken along the line BB in FIG. FIG. 7 is an explanatory front view showing the chuck claws constituting the first embodiment. FIG. 8 is an enlarged sectional view of the chuck claw. FIG. 9 is a cross-sectional view showing an example of a processed pipe that has been caulked and fixed in the first embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe to be processed 2 Outer tube 3 Inner tube 4 Notch for inlet / outlet 5 Processing base 6 Holding base plate 7 Notch 8 Rotating displacement plate 9 Immediate cylinder 10A Chuck claw body 10B Chuck claw body 10C Chuck claw body 10D Chuck Claw body 10E Chuck claw body 10F Chuck claw body 11 Passive cam roller 12 Guide pressing wall portion 13 Caulking fixing mechanism portion 14 Arm 14 'Arm 15A Pushing side hydraulic cylinder 15B Pulling side hydraulic cylinder 18 Stopper mechanism portion 19 Moving means L Predetermined position O Centripetal direction R Radial direction S Tangent direction S 'Tangent direction

Claims (6)

A multi-polymerization tube caulking fixing device for caulking the outer periphery of a predetermined position from the tube end of a multi-polymerization tube as a work tube having at least an outer tube and an inner tube inserted into the outer tube,
A holding base plate erected on the processing table by opening an inlet / outlet notch connected to the insertion space of the workpiece pipe on one side of the outer edge;
A rotation displacement plate that has a cutout portion that overlaps the inlet / outlet cutout portion and is held on the holding base plate in a rotatable manner after being overlapped;
A plurality of chuck claws that are concentrically provided on the holding base plate so as to be movable back and forth in the radial direction by the driving force of the quick-acting cylinder;
A passive cam roller mounted on the chuck claw,
A plurality of arc-shaped guide pushing walls that are rotated while urging a pressing force in the centripetal direction by being pressed against the outer periphery of the passive cam roller to apply a caulking force to the outer periphery of the pipe to be processed are concentric. A multi-tube caulking and fixing device, comprising: a caulking and fixing mechanism portion provided on the tube.   The caulking fixing mechanism portion is linked to the rotational displacement plate via an arm arranged in a tangential direction and is attached to the holding base plate, and a pulling side hydraulic pressure that forms a pair with the pressing side hydraulic cylinder The multiple pipe caulking according to claim 1, wherein a caulking force is applied to the work pipe by the guide pressing wall portion acting in a couple direction with respect to the passive cam roller. Fixing device.   On the processing table, a substantially U-shaped tube portion rear support frame portion capable of supporting the lower half of the outer tube of the tube to be processed on an axis passing through a substantially central front portion of the insertion space portion, A rear portion of each of the outer tube and the inner tube, comprising an inner tube rear end regulating plate portion provided near the rear of the tube portion rear support frame portion and capable of contacting the rear end of the inner tube. The multi-tube caulking and fixing device according to claim 1 or 2, wherein a stopper mechanism portion for supporting and positioning the shaft is movably provided in the axial direction by a moving means.   4. The multi-tube caulking / fixing device according to claim 3, wherein the moving means is a linear motor driving mechanism.   The pipe to be processed has a double pipe structure including an outer pipe made of a straight pipe and a bellows-like or spiral inner pipe inserted into the outer pipe, and the double pipe is formed in a straight line. The multi-tube caulking fixing device according to any one of claims 1 to 4, wherein the multi-tube caulking fixing device is formed in a curved tube bent in an arbitrary direction.   6. The multiple tube caulking fixing device according to claim 1, wherein at least one of the tube ends and / or both of the tube ends are caulked and fixed.

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