JP5488945B1 - Interlock tube manufacturing method and manufacturing apparatus thereof - Google Patents

Abstract

In manufacturing an interlock tube for easily forming a tube having a circular or polygonal cross section with high accuracy without loosening, in particular, in a cutting device for forming the tube, the slag deposited together with suction of the generated slag The manufacturing method of the interlock tube provided with the scraping of and the manufacturing apparatus therefor are provided.
A long metal strip 10 having a constant width has a bent shape such as an S-shaped cross section, and is wound spirally with a winding cored bar so that adjacent end portions mesh with each other. In the interlock tube that sequentially processes the strips, the cutting device 21a that is linked to the control device is disposed on the leading end side of the winding core bar, and sucks slag and collects the accumulated slag against the generated slag. It has a mechanism 22 for scraping.
[Selection] Figure 4

Description

Detailed Description of the Invention

  The present invention relates to an interlock tube manufacturing method for easily forming a tube having a circular or polygonal cross section with high accuracy without loosening, and an apparatus for manufacturing the interlock tube.

  Conventionally, a flexible tube as shown in FIG. 8 is known as an exhaust pipe of a vehicle such as an automobile. That is, this flexible tube 1 is used for not transmitting vibrations from the engine side to downstream components, etc., and is an interlock type flexible tube 2 (hereinafter referred to as “connectable flexible tube 2”) that conducts the upstream and downstream components. (Interlock tube) is arranged in the center, a bellows tube 3 having a bellows portion is arranged outside thereof, and an outer blade 4 is further arranged outside thereof, and both end portions 3a of the bellows tube 3 and the outer blade 4 are arranged. , 4b are each provided with a protector 5 that is bent so as to overlap both ends of the interlock tube 2.

  Thus, the interlock tube 2 used for such a flexible tube 1 is bent such that the cross-sectional shape of the flat metal strip 2a as shown by the arrow in FIG. Interlock tube having a flexible shape, which is formed into a metal strip 2b (see FIG. 9) and is wound spirally so that the bent portions on both sides thereof mesh with each other, and expands and contracts in the axial direction and the radial direction, respectively. It is said that.

  Further, in the molding, as shown in FIG. 9, a flat metal strip 2 a having a constant width and being drawn out from the uncoiler 6 is formed into a multi-stage roll while applying lubricating oil from the oil applicator 7. The metal strip 2b is fed into the apparatus 8 and is inserted between the upper and lower rolls 8a and 8b so that the flat metal strip 2a has an S-shaped cross section or the like (illustrated by a lead line in FIG. 8). The bent metal strip 2b is fed into the winding roll device 9 and spirally wound so that both side portions are engaged with each other, and is cut into a predetermined length by a plasma cutting device (not shown).

  There are two types of such interlock tubes, one having a circular cross section and another having a polygonal shape. For example, Patent Document 1 has a weakness in that a cross-section having a circular cross section has very good sealing performance but is easy to rotate and loosen, that is, a winding is loosened and easily detached, and the cross section is polygonal. Although the sealability is not so good, the rigidity and vibration detachability of the connected induction part can be set very accurately, and the polygonal end part keeps the hose in the predetermined shape and winding and does not rotate and loosen Has a function to make (see paragraphs [0002] to [0005] of the same document).

  That is, in the interlock tube having a polygonal section, the core tube having a polygonal section is wound at the time of winding, but can be formed by hooking on the polygonal end portion of the core metal. . Such an interlock tube having a polygonal cross section is also shown in, for example, FIG. 2 of Patent Document 2 and FIG. 12 of Patent Document 4.

  On the other hand, an interlock tube with a circular cross-section is wound using a metal core with a circular cross-section when winding, but it cannot be caught because of the circular shape, and a springback is not applied when winding the tube. As a result, the tube may not be able to hold the winding of the predetermined shape well, and may rotate and loosen in relation to the spring back against the thrust.

  In order to solve this problem, referring to FIG. 1 of Patent Document 4, a winding force is applied to the interlock tube after winding the interlock tube to a smaller diameter than the final shape, and a smaller diameter than the final shape. It is disclosed that the means for applying the anti-rotation direction force to the interlock tube after being wound on and the means for applying the anti-rotation direction force is a roll or an elastic member.

JP 11-344168 JP 2004-52810 A JP2007-30025 JP 08-218862

  As a result of diligent research in view of such a background, the patent applicant, while forming an interlock tube whose cross section is circular or whose cross section is nearly circular, prevents spring back and forms without loosening without rotating. The present invention has found an apparatus that can be molded with high accuracy, easily and with high work efficiency.

  In addition, there is a demand for forming a tube easily and efficiently. For example, instead of providing an oil application device separately at the front stage of the multi-stage roll forming apparatus, the oil application function is improved with the oil application function integrated on the upper side of the multi-stage roll forming apparatus, and the oil application agent is also improved. In addition, there is a demand to improve work efficiency and economy, such as using lubricating oil mixed in water. In addition, the interlock tube cutting mechanism linked to the main body of the device makes the slag generated at the time of cutting fine mist-like slag, and efficient removal with respect to the accumulation of slag generated at the time of cutting the tube. There are also requests to do this.

  In the manufacture of an interlock tube for easily forming a tube having a circular or polygonal cross section with high precision without loosening, the present invention is deposited together with suction of generated slag, particularly in a cutting apparatus for forming the tube. An object of the present invention is to provide a manufacturing method of an interlock tube provided with a slag scraping and a manufacturing apparatus thereof.

In order to achieve the above-mentioned object, the present invention provides a method for manufacturing an interlock tube, as described in claim 1, wherein a long metal strip having a constant width is bent like a S-section. In an interlock tube that is wound spirally with a winding cored bar so that adjacent end portions mesh with each other, and sequentially processes the metal strip, a cutting device for forming the tube is generated. In addition to suctioning the slag, a scraping of the slag to be deposited is provided.
Further, as a control device for an interlock tube, as described in claim 1, a long metal strip having a constant width has a bent shape such as an S-shaped cross section, and is wound so that adjacent end portions mesh with each other. In an interlock tube that is wound spirally with a metal core and processes the metal strip in sequence, the cutting device that forms the tube removes the accumulated slag along with the suction of the generated slag. It is characterized by having.

  According to the present invention, in forming all interlock tubes having a circular cross section or a polygonal cross section, it is possible to suck slag and scrape accumulated slag with respect to slag generated during cutting. Slag removal can be performed.

It is an explanatory top view which shows schematic structure of this invention. It is an explanatory perspective view which shows the time of winding of this invention. It is explanatory drawing which shows the operation | movement at the time of cutting | disconnection of this invention. It is explanatory drawing for longitudinal cross sections which shows the time of winding and the time of cutting of this invention. It is a top view for description which shows the cut part in FIG. It is explanatory drawing which shows a workpiece conveyance apparatus. It is explanatory drawing which shows the electrical system of this invention. It is the half sectional view which shows the conventional flexible tube, and an expanded sectional view in the part.

Hereinafter, an embodiment of the present invention will be exemplified as a typical embodiment and described with reference to the drawings.
FIG. 1 shows a semi-finished interlock tube 10 used as an exhaust pipe of an automobile or the like. A flat metal strip 10a having a constant width is used as a bent metal strip 10b. The metal strip 10c is formed into a bent metal strip 10c that is wound spirally, and the metal strip 10c is cut into a predetermined length to obtain a half-finished interlock tube 10. First, a flat metal strip 10 a installed on the uncoiler 12 is pulled out from the uncoiler 12 and fed into a pretreatment device 13 including a multi-stage roll forming device 14 and an oil application device 15.

  As shown in FIG. 9, the multistage roll forming apparatus 14 in the pretreatment apparatus 13 is composed of a plurality of stages of roll forming apparatuses having a well-known configuration that is almost the same as the conventional apparatus. It is sequentially formed as a bent metal strip 10b having a S-shaped cross section while being inserted between the step roll forming apparatuses.

  In addition, an oil application device 15 is integrally provided on the upper side of the multi-stage roll forming device 14 of the pretreatment mechanism 13, and the front and back surfaces of the bent metal strip 10b that are sequentially formed are provided. A lubricant mixed with water, that is, an oil coating agent which is a water-soluble emulsion diluted 60 times with water is applied as a lubricant. When applying this oil, if the lubricant is sprayed and used, the lubricant will be applied to areas other than necessary, which may lead to an increase in usage and equipment failure. Efficiently lubricate the necessary places.

  The apparatus main body 11 spirally winds the bent metal strip 10b drawn out from the pretreatment mechanism 13 around the winding core metal 17 (right side in the figure). That is, the feeding direction of the bent metal strip 10b extruded from the pretreatment device 13 is changed via the direction variable guide device 16 having the variable guide rolls 16a,. Wrap in a spiral.

A winding guide device 19 is disposed at the base of the winding core 17.
This winding guide device 19 has winding guide rollers 19 a arranged on the axial line thereof, and is made of a bent metal that is meshed with each other on the outer periphery of the winding core 17. The belt 10b is slid and wound in a spiral shape. A direction in FIG. 2 is a winding direction. The winding guide device 19 has a load measuring device (not shown). By adding this load measuring function, breakage of the winding guide can be prevented and production stoppage can be avoided.

  The winding metal core 17 is rotated by driving a motor 24 connected to the apparatus main body 11 and winds both ends of the fed bent metal strip 10b so as to mesh with each other. The tip of the winding core 17 in the tip direction is a cutting core 18, and a predetermined portion of the cutting core 18, that is, a cut portion 21 a on the tip side of the plasma cutting device 21 as will be described later. The opening 18a for cutting | disconnection which collect | recovers slag is drilled in the location which opposes (refer FIG. 5).

  Further, a fastening chuck device 20 is provided at the tip of the winding core 17 in the distal direction. The tightening chuck device 20 chucks and tightens the spiral metal strip 10b wound around the winding core 17 (direction B in FIG. 2), and is attached detachably and freely. The spring-like metal strip 10b prevents spring back and loosening caused by rotating in the reverse direction (direction C in FIG. 2). The configuration of the tightening chuck device 20 is not particularly limited as long as it performs the above-described operation, and various configurations can be selected as appropriate.

  A movable plasma cutting device 21 is disposed on the upper side of the cutting mandrel 18. As described above, the plasma cutting device 21 is movably disposed on the upper side of the cutting metal core 18, but has a cut portion 21 a that ejects a plasma arc on the tip side thereof. Cutting air is ejected from the cut nozzle at the tip opening, and the spiral metal strip 10b made of stainless steel or the like is heated and melted to cut instantaneously.

  As shown in FIG. 3, the discharge operation of the cut portion 21a is located above the cutting core 18 in the standby state (FIG. 3A). The cut nozzle touches the spiral metal strip 10b for a moment and discharges (Fig. (B)), then immediately moves to a predetermined position above and cuts while discharging (Fig. (C)). . Thereafter, the discharge is stopped and the cut portion 21a returns to the initial position (FIG. 5A).

  Thus, the cut portion 21a is applied at the same time as the contact between the electrode and the spiral metal strip (work), and then the distance between the electrode and the spiral metal strip (work) is appropriately set. The cutting is performed while maintaining the relationship, and then the cutting current is stopped, so that it is possible to prevent the discharge from being stopped after the cutting is completed or the cutting is melted and the cut end is melted too much.

Various cutting heat sources can be used. In this embodiment, cutting air that uses high-temperature plasma arc to heat and melt and instantaneously cuts is used. Therefore, it is extremely economical without using an expensive inert gas (Ar or the like) or oxygen (Co ²⁹ or the like) as in the prior art.

  4 and 5 show an enlarged portion of the cut portion. In FIG. 4, a cutting cored bar 18 and a fastening chuck device 20 are mounted at a cutting position on the forward direction side of the bent metal strip 10c wound spirally, and the metal strip 10c and A slag collecting device 22 is mounted inside the cutting core 18 and the fastening chuck device 20, and a hose 22a and a scraping device 22b are inserted. Further, the opening 18 a of the cutting core 18 is a slag receiving opening and is opened at a position facing the cut portion 21 a of the plasma cutting device 21.

  In FIG. 5, K1 is a virtual point indicating the cutting start position, K2 is a virtual point indicating the cutting end position, and the distance between them indicates one pitch for one rotation. Accordingly, when the metal strip 10c moves forward while rotating by one pitch, the cut portion 21a also moves while rotating in synchronization with the metal strip 10c by one pitch. K1 and the cutting end position virtual point K2 are cut on a straight line connecting the two.

  As described above, the slag collecting device 22 includes the hose 22a, the scraping device 22b, and the discharge path 22c. The slag generated at the time of cutting is provided at the location of the cutting core 18 facing the cut portion 21a. An opening 18a of the cutting cored bar 18 to be sucked is opened as a slag receiving port. Further, a hose 22a for removing the slag sucked from the opening 18a to the outside of the machine, a scraping device 22b for scraping the slag, and a scraping A discharge path 22c for discharging the slag is prepared. Note that the movement pitch of the winding core 17 and the cutting core 18 for one rotation, for example, the distance between the cutting start position a and the cutting end position b, the cutting time, and the like are product diameter × pitch × product length × Calculated and set according to the set time. That is, here, the set time means a production time per product (set production tact), and by setting and executing this, it is possible to secure planned and stable production.

  A work carry-out device 23 is provided at the final stage of the apparatus main body 11. The work carry-out device 23 is movable in the Y-axis (up and down) direction and the X-axis (left and right) direction, and has a work chuck body 23a at the tip thereof, which is a semi-finished product cut to a predetermined size. The interlock tube 10 is chucked and conveyed to the workpiece receiver 23b in the carry-out area. The configurations of the workpiece carry-out device 23, the workpiece chuck body 23a, and the like are not particularly limited as long as they have the above-described functions, and various configurations can be selected as appropriate.

  Next, the configuration of the electrical system of the present invention will be described with reference to FIG. In other words, the electrical system 100 is based on a command from a main arithmetic / control unit 101 (25 in FIG. 1) that controls the operation of each unit and controls the operation of each unit. Is a bending forming control unit 102 (13 in FIG. 1), an oil application control unit 103 (14 in FIG. 1), and a motor control unit 104 (24 in FIG. 1). ), A winding processing control unit 105 (11 in FIG. 1) to obtain a spiral bent metal strip 10c by controlling the winding metal core 17, a tightening chuck control unit 106 (20 in FIG. 1), cutting Control unit 107 (21 in FIG. 1), slag control unit 808 (22 in FIG. 1), work transfer control unit 109 (23 in FIG. 1), uncoiler unit 110 (12 in FIG. 1), input / display unit 111, etc. It is comprised by.

  As described above, the main calculation / control unit 101 controls and controls the operation of each unit connected to the apparatus, and the calculation of the operation includes the product diameter, pitch, product length, and set time (setting time). It is calculated and set based on the production tact) and the operating position of each part.

  The bend forming process control unit 102 is pulled out from the uncoiler 12 based on the general command of the main calculation / control unit 101 based on the input information from the uncoiler unit 110 and the operation of each unit in the apparatus when the operation is in the operating state. The flat metal strip 10a is instructed to be sequentially bent metal strip 10b in the pretreatment device 13.

  When an operation signal is input along with the operation of the bending forming process control unit 102, the oil application control unit 103 is mixed with water on the front and back surfaces of the bent metal strip 10b of the multi-stage roll forming device 14. To apply an oil coating agent, which is a lubricant.

  When the bent metal strip 10b is pulled out from the pretreatment device 13 and introduced into the apparatus main body 11, the main calculation / control unit 101 moves to the motor control unit 104 to operate the winding core 17. Command signal is input.

  In response to a command signal to the motor 104, the rotating operation of the winding mandrel 17 is started, and a bent metal strip 10c wound spirally is formed. If the bent metal strip 10b supplied from the multi-stage roll forming device 14 overlaps the bent metal strip 10c wound spirally, the winding guide roller 19a is damaged. In order to prevent this, by measuring the load applied to the winding guide roller 19a and sending a signal from the winding processing control unit 105 to the main calculation / control unit 101 to stop the equipment when the set value is exceeded. Do.

  When rotation of the winding core bar 17 and the cutting core bar 18 is started, the tightening chuck device 20 is simultaneously rotated, and is calculated from the product diameter, pitch, product length, and set time (set production tact). On the basis of the numerical values, a command for loading the tightening chuck portion 20 is output to the distal end portion of the bent metal strip 10b according to a command from the main calculation / control portion 101.

  The bent metal strip 10c wound spirally is cut from the main calculation / control unit 101 based on a signal from the plasma cutting device 21 in response to a command from the main calculation / control unit 101 when reaching a predetermined length. A command signal is issued to the control unit 107. At this time, the cut portion 21a of the plasma cutting device 21 is wound by one pitch per rotation from the bent metal strip 10c that is spirally wound by a command from the main calculation / control unit 101. Follows the movement in parallel to the exit direction. By this operation, the bent metal strip 10c wound in a spiral shape is cut in a direction perpendicular to the axial direction instead of the spiral shape. Further, the cut portion 21a is instructed as an operation to set the distance from the bent metal strip 10c wound spirally as an initial position, contact, a predetermined interval, and an initial position, and the cutting state is favorable. State.

  Thereafter, the slag control unit 108 is operated in accordance with a command from the main calculation / control unit 101, and the slag cut in the slag collection device 22 is input with a suction and scraping command signal.

  Thereafter, a signal is input to the workpiece conveyance command unit 109 in response to a command from the main calculation / control unit 101, and based on this, the workpiece chuck body 23a starts operating, and holds the interlock tube 10 which is a cut semi-finished product. Then, the loading and holding of the tightening chuck portion 20 is released, the tightening chuck portion 20 and the winding core metal 17 are retracted, come out of the interlock tube 10, and the work chuck body 23a is operated and conveyed to the work receiver 23b.

  Reference numeral 111 denotes an input / display unit, which can include appropriate means such as input means and image display means as desired.

  As described above, according to this representative embodiment, the following effects can be obtained. This can set the facility operation time from the required production time per product shown in this embodiment. However, the present invention is not limited to an interlock automatic manufacturing apparatus that promotes planned production and stabilizes quality, and an interlock manufacturing apparatus that does not have such a function may be used.

That is, when a tube having a circular cross section is easily formed with high precision without loosening, a metal core having a circular cross section or a cross section having a nearly round angle is provided and rotated in synchronization with a metal strip to be wound. Since it has a chuck device, even a circular interlock tube can be formed accurately and easily and with high work efficiency without rotating and loosening, and with a metal strip to be wound. An automatic molding device that is calculated from the product diameter, pitch, product length, and set time (set production tact), and can set the equipment operation time from the required production time per product based on the calculated value. It is to provide.
In addition, since the winding guide device is also equipped with a load measuring function, it is possible to provide an automatic molding device that can prevent the winding guide from being damaged and can prevent production stoppage.
In addition, in order to make it easier and more efficient to form tubes, an oil application device is not separately provided at the front stage of the multi-stage roll forming apparatus, but oil is integrally applied to the upper side of the multi-stage roll forming apparatus. Lubricating oil, which is a water-soluble emulsion that has been mixed with water with improved oil coating agent, ie, diluted 60 times with water, is applied to the necessary place instead of spraying while performing with good work efficiency while having functions Therefore, it is intended to improve work efficiency and economy.
Furthermore, the cutting of the interlock tube linked to the main body of the apparatus makes the generated slag a fine mist-like slag, and performs an excellent and efficient removal against the accumulation of slag generated at the time of cutting the tube. .
Also, during plasma cutting, the cut part is operated so that it can be a predetermined distance immediately after the start of cutting, so that a stable state can be ensured, and the cut surface is welded and becomes a multilayer. It is possible to melt the interlock.
Furthermore, inexpensive compressed air is used for cutting without using an inert gas or oxygen.
Therefore, according to the present invention, a tube having a circular or polygonal cross section is easily formed with high accuracy without loosening, excellent in workability at the time of cutting, etc., excellent in work efficiency of the apparatus itself, and per product. It is possible to set the operation time from the required production time, and to obtain an interlock tube in which planned production is promoted and quality is stabilized.

  Therefore, according to the present invention, in forming all the interlock tubes having a circular cross section or a polygonal cross section, it is possible to suck slag and scrape the accumulated slag with respect to the slag generated at the time of cutting. Complete slag removal can be performed.

  In addition, although this invention was demonstrated by the above Example, of course, it is applicable also to the forming apparatus of the interlock tube which is not provided with the calculation control part etc. of this invention.

DESCRIPTION OF SYMBOLS 10 Metal strip for interlock tubes 10a Flat metal strip 10b Bending metal strip 10c Bending metal strip 11 spirally wound 11 Main body 12 Uncoiler
DESCRIPTION OF SYMBOLS 13 Pretreatment apparatus 14 Multistage roll forming apparatus 15 Oil application apparatus 16 Direction variable guide apparatus 16a Variable guide roller 17 Winding core 18 Cutting core 18a Core opening 19 Winding guide 19a Winding guide roller 20 Tightening chuck Device 20a Tightening chuck body 21 Plasma cutting device 21a Cut part 22 Slag recovery device 22a Hose 22b Scraping device 22c Discharge path 23 Work carry-out device 23a Work chuck body 23b Work receiving 24 Motor 25 Control device 26 Display device 100 System main body 101 Main calculation / Control unit 102 Bending process control unit 103 Oil application control unit 104 Motor control unit 105 Winding process control unit 106 Tightening chuck control unit 107 Cutting control unit 108 Slag control unit 109 Work transfer control unit 110 Uncoiler unit 111 ON Power / display section

Claims (2)

A long metal strip having a constant width is bent like an S-shaped cross section, and is wound spirally with a winding core so that adjacent end portions engage with each other. In interlock tube to be processed sequentially,
A tube having a circular or polygonal cross section, wherein the cutting device for forming the tube includes suction of the generated slag and scraping of the slag to be deposited. Method. A long metal strip having a constant width is bent like an S-shaped cross section, and is wound spirally with a winding core so that adjacent end portions engage with each other. In interlock tube to be processed sequentially,
A tube having a circular or polygonal cross section, wherein the cutting device for forming the tube includes suction of the generated slag and scraping of the slag to be deposited. apparatus.

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