JP2014155953A - End occlusion device of pipe after burring processing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To collapse both ends of a pipe which has been subjected to burring processing at the same time, prevent strain of the pipe due to pressure applied during collapse, and prevent deformation of a burring hole.SOLUTION: A pair of pins 3, 3 for preventing deformation of a burring hole and for positioning a pipe, and being inserted into the burring hole Pb disposed near both ends of the pipe P and lifting up and down at optional timing, are disposed on a center of a machine base 2. On the machine base 2, a pair of clamps 11, 11 going forward and backward at optional timing, holding the pipe supported by the pair of pins 3, 3 and covering the whole periphery of the pipe when they are going forward are disposed with their pressure applying surfaces made into semicircular shapes. In addition, on the machine base 2, a pair of pressure punches 12, 12 going forward and backward at optional timing, collapsing the predetermined position of both ends of the pipe supported by the pair of pins when they are going forward, and formed of the pair of parallel punch parts 12A, 12A are disposed.

Description

  The present invention relates to a pipe end closing device after burring.

  For example, a pipe having a burring process on one side surface and a perforation on the opposite side surface may be used as a connection part in an air conditioning system of an automobile. The pipe uses IN as the perforation side and OUT as the burring side. In addition, the pipe needs to be further closed by crushing the openings on both ends in the axial direction.

  Further, such work is performed manually by an operator, and is performed by means such as crushing the ends of the pipes from both sides with a punch that opens and closes by power, or hitting with a hammer.

  However, in the case of such conventional means, when the end portion of the pipe is pressurized, deformation occurs in the portion near the pressurizing portion of the pipe body due to the pressure, and also in the vicinity of the end portion. The located burring hole is also deformed.

  In addition, since crushing is performed depending on intuition, the crushing position and range are different at both ends of each product, and variations occur in all products.

  Furthermore, conventionally, both ends of the pipe cannot be pressurized at the same time, and one of them must first be crushed and then the other must be crushed. Therefore, it took time and effort, and the work efficiency was poor.

  The present invention has been made in view of the above points. The pipe is inserted into the burring hole of the pipe and moved up and down at an appropriate timing, and a pair of pins for preventing deformation of the burring hole, and advanced and retracted at an appropriate timing. A pair of clamps that wraps the entire circumference of the pipe with equal force across the pipe supported by the pair of pins when moving forward, and at a suitable timing, and supported by the pair of pins when moving forward It has a pair of pressure punches consisting of a pair of punch parts parallel to each other with a predetermined position at both ends in the axial direction of the pipe, and crushes both ends while suppressing distortion of the pipe and deformation of the burring hole The exact position and range should be pressurized, so that both ends of the pipe can be processed at once and most of the process automatically, What is intended to provide an end closure device of the pipe after burring when taken as altogether it is possible to solve the problems in the conventional means.

  Thus, the gist of the present invention is that the machine base and the central part of the machine base are disposed at the positions of the burring holes in the vicinity of both ends of the pipe to be processed, and are inserted into the burring holes of the pipe. Position the pipe that moves up and down at an appropriate timing and a pair of pins for preventing deformation of the burring hole, and advance and retract at an appropriate timing, and when moving forward, the pipe supported by the pair of pins is sandwiched from both sides to surround the entire circumference of the pipe A pair of clamps that wraps with equal force, the pressure surface is semicircular, and advances and retracts at an appropriate timing, and when advanced, crushes the predetermined positions of both ends of the pipe supported by the pair of pins, respectively. A pipe end closing device after burring, characterized by comprising a pair of pressure punches consisting of a pair of parallel punch portions.

  Further, in the above configuration, a pair of pin lifting mechanisms for positioning the pipe and preventing deformation of the burring hole are disposed on the machine base, and the gear box penetrates in the front-rear direction and is fixed on the machine base. A rack that can be moved forward and backward in the longitudinal direction of the machine base, a pair of pinions that are rotatably supported in the gear box and mesh with the rack, and an inner surface of a hole provided in the center of the pinion You may make it comprise with the external thread formed in the outer peripheral surface of the said pair of pin screwed together with this internal thread.

  Further, in the above configuration, each of the operating mechanisms of the pair of clamps and the pair of pressure punches is a press mechanism that causes the slide to move horizontally through the toggle mechanism, and the pair of clamps and the pair of press punches. The pressure punches fix the bases of the pair of punch portions constituting the pressure punch at the both end positions on the front surface of the slide, while sliding the pair of punch portions in the grooves provided at the left and right end positions. The expansion coil is housed in a spring housing chamber that is freely fitted and is always urged in a direction away from the slide with a pressure-enhanced coil spring provided between the slide and further extended in the forward / backward direction from the rear end surface. A pressure coil spring and a base portion fixed to a center position on the front surface of the slide, and a front end of the pressure coil spring in the spring accommodating chamber The front end clamping surface of the clamp body, which is always provided with a movement tendency toward the pipe side with a pressing rod in contact with the groove, has a semicircular shape that matches the outer diameter of the pipe. The respective crankshafts of the clamp and the pair of pressure punches may be rotated simultaneously by the same motor.

  Since the present invention is configured as described above, when a pipe is set in a state where a pair of pins for positioning the pipe and preventing deformation of the burring hole are inserted into each of the burring holes located near both ends in the axial direction. The pipe is naturally positioned so that the exact positions to be crushed at both ends in the axial direction coincide with the pressure portions of the pair of pressure punches. When crushing both ends of a pipe with a pair of pressure punches, the pipes supported by a pair of pins are sandwiched by a pair of clamps from both sides, In a uniform force to suppress distortion of the pipe, and a pair of pins inserted into each of the burring holes serve as cores to prevent deformation of the burring hole. Than is. The crushing of both ends of the pipe is performed at the same time, and the processing operations from setting the pipe to the pair of pins to closing the both ends of the pipe are automatically performed as a series of operations. Therefore, the problems in the conventional means can be solved.

It is a perspective view of the principal part of the apparatus which concerns on embodiment of this invention, and shows the state which sets a pipe. It shows a state where a pair of pressure punches pressurize both ends of the pipe. It shows a state in which the same pair of pressure punches and the pair of clamps are retracted. It is the front view which showed the same part by the cross section. It is the same top view. It is the left view which showed the part of the rotating shaft in the action | operation mechanism of the same clamp and a pair of press punch in the cross section. It is the left view which showed the part of one crankshaft in the action | operation mechanism of the same clamp and a pair of press punch in the cross section. It is the right view which showed the part of the other crankshaft in the action | operation mechanism of the same pair clamp and a pair of press punch in the cross section. It is an expanded longitudinal cross-sectional view of the principal part. It is the enlarged plan view which abbreviate | omitted and showed a part noting a pair of pin and its raising / lowering mechanism of the principal part. It is the top view which notched and showed a part of the state which exists in the fixed position which the pair of pin of the principal part raised. FIG. 12 is an enlarged longitudinal front view of the pin and its lifting mechanism portion in the state of FIG. 11. It is the top view which notched and showed a part of the state which a pair of pin of the principal part fell. FIG. 13 is an enlarged vertical front view of the pin and its lifting mechanism in the state of FIG. 12. It is an enlarged vertical right side view of the pin and its lifting mechanism part.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  In the figure, reference numeral 1 denotes a pipe end closing device after burring. 2 is a machine base.

  Reference numerals 3 and 3 denote a pair of pins for positioning the pipe P and preventing deformation of the burring hole Pb. The pair of pins 3 and 3 are disposed at the positions of the burring holes Pb in the vicinity of both ends of the pipe P to be pressurized at the center of the machine base 2 and are inserted into the burring holes Pb of the pipe P, respectively. Is.

  The pair of pins 3 and 3 are moved up and down at an appropriate timing. That is, the raised position is a fixed position, which is a position when a new pipe P is set, a time when pressure is applied by a pair of pressure punches described later, and a time when the processed pipe P is taken out. Further, the descent is performed immediately after the pressure is applied by the pair of pressure punches and still when the pipe P is still sandwiched between the pair of clamps. This is performed in order to forcibly separate the pin 3 from the burring hole Pb because each of the pair of pins 3 and 3 is in strong contact with each of the burring holes Pb by the pressure applied by the pair of pressure punches. . Therefore, the descent is performed in the range of several millimeters.

  Reference numeral 4 denotes an elevating mechanism for the pair of pins 3 and 3. The lifting mechanism 4 for the pair of pins 3 and 3 includes a gear box 5 disposed on the machine base 2 and a cylinder 6 that penetrates the gear box 5 in the front-rear direction and is fixed on the machine base 2. A rack 7 that can be moved back and forth in the longitudinal direction of the machine base 2, a pair of pinions 8 and 8 that are rotatably supported in the gear box 5 and mesh with the rack 7, and the pair of pinions 8 and 8. A female screw 9 is formed on the inner surface of a hole provided in the central portion, and a male screw 10 is formed on the outer peripheral surface of each of the pair of pins 3 and 3 to be engaged with the female screw 9.

  Reference numerals 11 and 11 denote a pair of clamps having a front end clamping surface semicircular. The pair of clamps 11 and 11 advance and retreat at an appropriate timing. When the pair of clamps 11 and 11 advance, the pipe P supported by the pair of pins 3 and 3 is sandwiched from both sides and the entire circumference of the pipe P is wrapped with equal force. Is.

  Reference numerals 12 and 12 denote a pair of pressure punches each including a pair of punch portions 12A and 12A that are parallel to each other. The pair of pressure punches 12 and 12 advance at an appropriate timing, and when advanced, crush the predetermined positions at both ends of the pipe P supported by the pair of pins 3 and 3.

  Reference numeral 13 denotes an operating mechanism for the clamp 11 and the pressure punch 12 on one side of the pair of clamps 11 and 11 and the pair of pressure punches 12 and 12. The one side clamp 11 and pressure punch 12 actuating mechanism 13 is a press mechanism that causes the rotation of the crankshaft to move the slide horizontally via a toggle mechanism. A toggle link 17 pivotally connected at one end to a base block 15 fixed to a base shaft 16 and a slide shaft 18 provided on the machine base 2 so as to be horizontally movable in the left-right direction of the machine base 2. A toggle link 20 pivotally connected at one end, and a connecting rod pivotally connected to the crankshaft 14 at one end and pivotally connected at the other end to the other end of the toggle links 17 and 20 at the other end. 22.

  In addition, the clamp 11 and the pressure punch 12 on the one side operated by the operating mechanism 13 are configured as follows in this embodiment. While fixing the base of each of the pair of punch portions 12A, 12A constituting the pressure punch 12 to both end positions on the front surface of the slide 18, the pair of punch portions are provided in grooves 23a, 23a provided at both left and right end positions. Each of 12A and 12A is slidably fitted, and is urged in a direction away from the slide 18 at all times by a pressure expanding coil spring 24 provided between the slide 18 and further extends in the forward / backward direction from the rear end surface. A base portion is fixed at the center position on the front surface of the slide 18 and the front end is connected to the pressure expansion coil spring 25 in the spring storage chamber 23b. The front end clutch of the main body 23 of the clamp which is always provided with a moving tendency toward the pipe P side with the pressing rod 26 in contact with the pressing rod 26 It is made of a flop surface as semicircular-matched with the outer diameter of the pipe P. A cover 27 covers the clamp 11 on one side and the operating mechanism 13 of the pressure punch 12.

  Reference numeral 28 denotes an operating mechanism for the clamp 11 and the pressure punch 12 on the other side of the pair of clamps 11 and 11 and the pair of pressure punches 12 and 12. The operating mechanism 28 of the clamp 11 and the pressure punch 12 on the other side is a press mechanism that causes the rotation of the crankshaft to move the slide horizontally via a toggle mechanism. A toggle link 32 pivotally connected at one end to a base block 30 fixed to the base block 30, and a slide shaft 34 on a slide 33 provided on the machine base 2 so as to be horizontally movable in the left-right direction of the machine base 2. A toggle link 35 pivotally connected at one end, and a connecting rod pivotally connected to the other end of the toggle links 32, 35 with the other end connected to the crankshaft 29 and the swing shaft 36 at the other end. 37.

  In addition, the clamp 11 and the pressure punch 12 on the other side operated by the operating mechanism 28 are configured as follows in the present embodiment. While fixing the base of each of the pair of punch portions 12A and 12A constituting the pressure punch 12 to both end positions on the front surface of the slide 33, the pair of punch portions are provided in grooves 38a and 38a provided at both left and right end positions. Each of 12A and 12A is slidably fitted, and is urged in a direction away from the slide 33 at all times by a pressure expanding coil spring 39 provided between the slide 33, and further extends in the forward and backward direction from the rear end surface. The base part is fixed to the central position on the front surface of the slide 33, and the front end is connected to the pressure expansion coil spring 40 in the spring storage chamber 38b. The front end clutch of the main body 38 of the clamp which is always provided with a moving tendency toward the pipe P side with the pressing rod 41 in contact with it. It is made of a flop surface as semicircular-matched with the outer diameter of the pipe P. A cover 42 covers the clamp 11 on the other side and the operating mechanism 28 of the pressure punch 12.

  The crankshafts 14 and 29 are simultaneously rotated by the same motor. The driven pulleys 43 and 44 fixed to the crankshafts 14 and 29 and the lower part of the machine base 2 are rotatable. The rotating shaft 45 supported, the driving pulleys 46 and 47 fixed to the rotating shaft 45, the belts 48 and 49 wound around the driving pulleys 46 and 47 and the driven pulleys 43 and 44, respectively, and the rotating shaft 45 A driven pulley 50 fixed to the lower side of the machine base 2, a servo motor 51 fixed horizontally to the lower part of the machine base 2, a driving pulley 53 fixed to a rotating shaft 52 of the servo motor 51, the driving pulley 53 and the driven pulley 50. And a belt 54 wound around.

  Next, the processing order in this embodiment will be described.

  First, as shown in FIGS. 1, 9, and 12, an operator drops a new pipe P onto a pair of pins 3 and 3 and sets them. At this time, the pair of pins 3 and 3 are inserted into the burring holes Pb and Pb located in the vicinity of both ends of the pipe P, respectively. As a result, the pipe P is supported at an appropriate position, and the cored bar is inserted into each of the burring holes Pb. Next, when an operator pushes an operation start switch (not shown), the left and right slides 18 and 33 are simultaneously advanced via the operation mechanisms 13 and 28.

  When the pair of clamps 11 and 11 advanced by the left and right slides 18 and 33 come into contact with the pipe P, the main bodies 23 and 38 of the respective clamps stop moving forward. The clamp main bodies 23 and 38 are moved toward the slides 18 and 33 against the action of the pressure expanding coil springs 24 and 38, respectively.

  When the slides 18 and 33 further advance, the pressure expanding coil springs 25 and 40 press the clamp bodies 23 and 38 against the pipe P with a strong force corresponding to the contraction. Thereby, before pressurization by a pair of press punches 12 and 12, the pipe P can be sandwiched from both sides and the entire circumference of the pipe P can be wrapped with an equal force, and distortion of the pipe P due to pressurization can be prevented. be able to.

  Further, when the slides 18 and 33 further advance, as shown in FIG. 2, pressure is applied to both ends of the pipe P by the pair of pressure punches 12 and 12, specifically, the both punch portions 12A and 12A. As a result, both ends of the pipe P are crushed in their proper positions and ranges. At this time, the pin 3 inserted into each of the burring holes Pb of the pipe P acts as a metal core, so that deformation of the burring holes Pb during pressurization can be prevented.

  Next, while in this state, the rack 7 is advanced by the cylinder 6 as shown in FIGS. As a result, the pin 3 that is in strong contact with the burring hole Pb of the pipe P by the action of pressure is lowered and forcibly separated from the burring hole Pb. Further, the lowering of the pin 3 and the feeding, pressurizing and lifting of the pipe P to the position are performed as follows.

  As the rack 7 moves forward or backward, the pinion 8 in the gear box 5 meshing with the rack 7 rotates. And when such a pinion 8 rotates, the internal thread 9 formed in the inner surface of the hole provided in the center part will also rotate. Then, the pin 3 moves up and down through the rotation of the male screw 10 formed on the outer peripheral surface of the pin 3 screwed with the female screw 9. In this embodiment, the pin 3 descends when the rack 7 moves forward, and the pin 3 moves up when the rack 7 moves backward.

  Then, as shown in FIG. 3, when the slides 18 and 33 start to retract simultaneously, the rack 7 retracts, and the pair of pins 3 and 3 are raised while supporting the pipe P after the completion of processing. is there. Then, the worker removes the processed pipe P from the pair of pins 3 and 3 and supplies the unprocessed pipe P onto the pair of pins 3 and 3 again.

  The present embodiment is as described above, and a pair of pins 3 and 3 for positioning the pipe and preventing deformation of the burring hole are inserted into the burring holes Pb and Pb located near both ends in the axial direction of the pipe P. When set in a state in which the pipe P is set, the pipe P is naturally positioned so that the exact positions to be crushed at both ends in the axial direction coincide with the pressure portions of the pair of pressure punches 12, 12. The crushing by the pressure punches 12 and 12 is limited to the crushing position and range of both ends of the pipe P. When crushing the both ends of the pipe P by the pair of pressure punches 12 and 12, The pipe P supported by the pins 3 and 3 is sandwiched by a pair of clamps 11 and 11 from both sides, and the entire circumference thereof is wrapped with an equal force, thereby suppressing distortion of the pipe P and burring holes Pb. A pair of pins 3, 3 inserted into the respective becomes the core metal is to prevent deformation of the burring holes Pb. The crushing of both ends of the pipe P is performed at the same time, and the processing operations from the setting of the pipe P to the pair of pins 3 and 3 to the closing of the both ends of the pipe P are automatically performed as a series of operations. It is what is said. Therefore, the problems in the conventional means can be solved.

2 Machine base 3, 3 Pair of pins 4 Lifting mechanism of a pair of pins 5 Gear box 7 Rack 8 Pinion 9 Female screw 10 Male screw 11, 11 Pair of clamps 12, 12 Pair of pressure punches 12A, 12A Pair of punch parts 13 One Side clamp and pressure punch actuation mechanism 18 slide 23 clamp body 28 other side clamp and pressure punch actuation mechanism 33 slide 38 clamp body 51 servo motor

Claims (3)

  In the central part of the machine base and the machine base, the pipes to be machined are arranged at the positions of the burring holes in the vicinity of both ends, inserted into the burring holes of the pipe, and moved up and down at an appropriate timing, and positioning of the pipes A pair of pins for preventing deformation and advancing and retreating at an appropriate timing, and when moving forward, the pipe supported by the pair of pins is sandwiched from both sides, and the entire circumference of the pipe is wrapped with an equal force, and the pressure surface is semicircular And a pair of pressure punches comprising a pair of punch portions parallel to each other that crush the predetermined positions of both ends of the pipe supported by the pair of pins when advanced and retracted at an appropriate timing and when advanced. An end closing device for a pipe after burring processing, characterized by comprising:   A lifting mechanism for a pair of pins for positioning the pipe and preventing deformation of the burring hole, a gear box disposed on the machine base, and a cylinder that penetrates the gear box in the front-rear direction and is fixed on the machine base, A rack that is advanced and retracted in the front-rear direction; a pair of pinions that are rotatably supported in the gear box and mesh with the rack; a female screw formed on an inner surface of a hole provided in a central portion of the pinion; and the female screw 2. The pipe end closing device after burring processing according to claim 1, wherein the pipe end closing device is configured to include a male screw formed on an outer peripheral surface of the pair of pins. The operating mechanism of each of the pair of clamps and the pair of pressure punches is a press mechanism that causes the rotation of the crankshaft to move the slide horizontally via the toggle mechanism, and the pair of clamps and the pair of pressure punches are the slides. The base portions of the pair of punch portions constituting the pressure punch are fixed to the both end positions on the front surface of the front side, and the pair of punch portions are slidably fitted in grooves provided at the left and right end positions. The pressure-enhanced coil spring provided between the slide and always energized in a direction away from the slide, and further accommodated in a spring accommodating chamber provided so as to extend in the forward / backward direction from the rear end surface; A pressing rod that has a base fixed at a central position on the front surface of the slide and a front end that contacts the expansion coil spring in the spring accommodating chamber. Thus, the front end clamping surface of the clamp body, which is always provided with a tendency to move toward the pipe, has a semicircular shape that matches the outer diameter of the pipe, and the pair of clamps and the pair of pressurizations. 3. The pipe end portion closing device according to claim 1 or 2, wherein the crankshafts of the punches are simultaneously rotated by the same motor.

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