JP4611874B2 - Automatic pipe drawing system - Google Patents

Description

  The present invention relates to an automatic pipe drawing system for automatically drawing various pipes such as a round pipe, a square pipe, and a deformed pipe.

  As shown in Patent Document 1, this kind of blank pipe drawing system has a back bench having a plug rod and a carriage rail having a die fixed to a rear end portion in the drawing direction, which are arranged in series. A blank tube is passed between them, and the front end of the blank tube is chucked and pulled out by a carriage traveling on the carriage rail.

  In this blank pipe drawing system, the blank pipe supplied from the front in the drawing direction of the back bench is held by a clamp and horizontally moved, so that the rear end of the blank pipe is extrapolated to the tip plug of the plug rod. After the extrapolation of the raw pipe, the end of the raw pipe is held by the pipe end holding mechanism on the back bench, and after releasing the raw pipe from the clamp, the front end of the raw pipe is pressed by the pusher device. Is inserted into the plug rod.

After extrapolation of the pipe, hold the front end of the pipe with the clamp to return the back bench to the original position, advance the back bench to the die side, and advance the clamp to the die side to move the front end of the pipe Is guided to the die, and the carriage that runs on the carriage rail is chucked at the front end of the base tube and pulled out from the die.
JP-A-64-31517

  However, in Patent Document 1, not only a pusher device that presses the tip of the raw tube in order to extrapolate the raw tube to the plug rod, but also a traveling platform that freely travels on the back bench to hold the tube end of the raw tube. In addition, a pipe end holding mechanism is required, and the system is complicated.

  Also, the tube end holding mechanism spreads a pair of chuck pieces inside the tube and holds the end of the tube with its frictional force, so there is a problem when targeting large diameter tubes. Although there is no, it is impossible to hold the tube end when a small diameter (for example, 20 mm or less) raw tube is targeted.

  Furthermore, the back bench shown in Patent Document 1 reciprocates at two positions, ie, a tube extrapolation position and a tube pull-out position, and at the time of pulling out the tube, the back bench is advanced, and a clamp provided on the back bench Is advanced to the die side to guide the front end of the blank tube to the die. Therefore, for example, as a back bench for pulling out a raw tube having a length of about 3500 mm, it is necessary to move not only in the left-right direction but also in the front-rear direction, and the drive mechanism is complicated.

  Furthermore, in Patent Document 1, since the clamp is in an open state while the raw tube is being pulled out, there is no mechanism for guiding the raw tube to the die in the vicinity of the die, and the supply posture of the raw tube to the die is not good. There was a possibility of unevenness in the drawn tube.

  In view of the above, the present invention provides an automatic pipe drawing system that can accurately guide a plug rod to a pipe with a simple mechanism and can stably guide the pipe against a die. It is an object.

  In order to achieve the above-mentioned object, the present invention is for extrapolating a raw tube supplied from a raw tube supply base to a plug rod, and inserting the raw pipe extrapolated to the plug rod into the die side of the raw tube drawing base. In addition, the back bench can be switched between the tube extrapolation position and the tube extraction position, and the tube supplied to the tube supply stand is extrapolated to the plug rod on the back bench, and the back bench element is inserted. A raw pipe drawing system in which a raw pipe is passed between a die and a plug at the front end of a plug rod at a pipe drawing position, the raw pipe is chucked by a carriage on the pipe drawing base, and the raw pipe is drawn. A left and right support roller mechanism arranged at the front end of the bench and a plurality of vertical support roller mechanisms arranged at intervals in the front-rear direction on the back bench are provided. When extrapolating the tube A rod support for supporting and guiding the Guroddo, is characterized in that at least a pair of support rollers also serves a mother pipe support for supporting and guiding the blank tube during withdrawal of the mother tube has respectively.

  According to the above configuration, the upper and lower support roller mechanism and the left and right support roller mechanism support the plug rod from the vertical and horizontal directions when the tube is inserted into the plug rod, so that the bending of the plug rod is suppressed and stable. The tube can be extrapolated. In addition, when pulling out the pipe, the pipe is supported from above and below and from the left and right, so that the pipe can be guided to the die in a stable state.

  Here, the combination of the rod support and the raw tube support means that the pair of support rollers move according to the outer diameter of the rod when supporting the plug rod and the outer diameter of the raw tube when supporting the plug. It means sandwiching a rod or a raw tube. In order to stably support the rod or the raw tube by sandwiching, it is preferable to use a V-shaped roller as each support roller.

  In the present invention, a plug set device that holds the rear end of the plug rod and moves the plug rod in the front-rear direction is provided at the rear end of the back bench, and the plug rod moves forward by the plug set device. The front plug can project forward from the back bench, and the left and right support roller mechanism is provided to be movable in the front-rear direction at the front end of the back bench.

  According to the above configuration, the plug set device is moved forward from the rear end portion in the pulling direction, and the left and right support roller mechanism for supporting the plug rod is moved to the front end portion side in the pulling direction, and is positioned on the front end side of the back bench. It is the closest to the raw tube supply stand. Therefore, at the time of extrapolation of the raw pipe, it is possible to perform the extrapolation of the raw pipe stably while suppressing the bending of the plug rod. In addition, since the left and right support roller mechanisms can be brought closest to the die when the raw tube is pulled out, the raw tube can be guided in a stable state with respect to the die.

  In the left and right support roller mechanism, it is preferable that a pair of left and right support rollers be arranged in two rows in the drawing direction of the raw tube. As a result, the plug rod and the raw tube can be supported for a long time in the drawing direction, and stable support is possible.

  The left and right support roller mechanism includes a pair of left and right roller support plates, two support rollers arranged in the pulling direction on each roller support plate, and an opening and closing mechanism that opens and closes both support plates in a rotatable manner and in parallel. And a means.

  According to the above configuration, the support plate for supporting the two support rollers is provided with the opening / closing means for opening and closing and opening and closing in parallel, so that the left and right support rollers are always kept parallel and stable at any position. A support mechanism can be realized.

  In addition, a clamping device having a pair of clamp pieces capable of gripping the rear end portion of the raw tube is provided at the rear portion of the raw tube supply base, and the clamping device is movable in the front-rear direction in the direction of extrapolation of the raw tube. In addition, the tip plug of the plug rod can be interposed between the clamp pieces at the rear position thereof.

  According to the above configuration, since the pipe end and the tip plug are interposed between the clamp pieces when the pipe and the plug are extrapolated, the work of extrapolating the pipe to the plug is performed in a stable state. be able to.

  As described above, according to the present invention, the support roller of the left / right / upper / lower support roller mechanism is used for both the support of the plug rod and the support of the raw tube, so that the plug rod is accurately guided to the raw tube by a simple mechanism. It is possible to guide the blank tube stably with respect to the die, and improve the straightness of the blank tube.

  Hereinafter, an automatic pipe drawing system according to an embodiment of the present invention will be described with reference to the drawings. 1 (a) to 1 (e) are schematic explanatory views showing from a tube extrapolation step to a tube pulling step in a tube automatic drawing system according to an embodiment of the present invention, and FIG. 2 is a back bench shown in FIG. 3 is a side view of the back bench, FIG. 4 is a plan view showing the positional relationship between the left and right support roller mechanisms and the clamping device, and FIG. 5A is a plan view showing the open posture of the left and right support roller mechanisms. FIG. 6B is a plan view showing the closed posture of the left and right support roller mechanism, and FIG. 6 is a front view of the left and right support roller mechanism as viewed from the raw tube supply side.

  The raw pipe automatic drawing system of this embodiment includes a raw pipe supply base 2 for supplying a raw pipe, and a raw pipe drawing base 4 arranged at a position below the raw pipe supply base 2 and having a die 3 fixed to the rear end in the drawing direction. And a back bench 6 having a plug rod 5 for extrapolating the raw tube.

  The raw tube supply base 2 is configured by a V-shaped receiving base that is supplied with a plurality of rows (three rows in the present embodiment) to which the raw tubes are supplied. Supplied automatically. A clamping device capable of reciprocating back and forth in the front-rear direction (this direction coincides with the extrapolation direction and the withdrawal direction since the direction coincides with the extrapolation direction and the withdrawal direction) by a cylinder 9 on the rear end side of the raw tube supply base 2 10 is provided.

  In the present embodiment, the supplied raw pipe 8 is a small pipe having a length of about 3 m and a diameter of 20 mm or less (preferably about 10 mm to 20 mm), but the present invention is not limited thereto. However, the diameter of the pipe, the length of the pipe, and the number of pipes to be drawn at the same time can be selected as appropriate.

  As shown in FIG. 3, the clamp device 10 includes a pair of clamp pieces 10 a that can be opened and closed on both the left and right sides with the extrapolation center of each element tube interposed therebetween so that the rear end portion of each element tube can be clamped. The length of the clamp piece 10a in the front-rear direction is set to a length at which a later-described distal end plug 11 can be interposed between the clamp pieces 10a at the rear position of the clamp device 10. A support roller 10b for receiving the plug rod 5 is provided on the rear end side of the clamp piece 10a.

  A pusher device 40 that moves in the front-rear direction by a drive mechanism such as a motor or a cylinder is provided on the front end side of the raw tube supply base 2. The pusher device 40 is provided with a pressing piece 40a so that the front end of the raw tube 8 supplied to the raw tube supply base 2 can be pressed to the rear back bench side when the raw tube 8 is extrapolated. .

  The raw tube drawing table 4 is arranged in parallel below the raw tube supply table 2, and a die 3 is fixed to a rear end portion in the drawing direction. Further, a carriage 12 that grips the raw pipe and travels in the drawing direction is provided on the raw pipe drawing stand 4.

  The back bench 6 includes an upper element tube extrapolation position A for extrapolating the element tube 8 to the plug rod 5 and a lower element tube through which the element tube 8 is drawn between the die 3 and the plug 8. Switching between the drawing position B and the up / down direction is possible. The lifting mechanism 15 of the back bench 6 includes a pantograph 17 interposed between the base 6a and the lifting base 6b, and a lifting cylinder 16 that opens and closes the pantograph mechanism 17.

  The lifting platform 6b of the back bench 6 includes a plurality of upper and lower support roller mechanisms 19 arranged at intervals in the drawing direction, a left and right support roller mechanism 20 arranged at the front end of the back bench 6, and a rear end in the drawing direction. And a plug setting device 21 that holds the rear end of the plug rod 5 and moves the plug rod 5 back and forth in the front-rear direction.

  The upper and lower support roller mechanism 19 includes a pair of upper and lower rollers 19b and 19c supported by an arm 19a so as to be openable and closable, and when the both rollers are closed, the raw tube 8 is at the raw tube extrapolation level or the raw tube extraction level. It matches. The rollers 19b and 19c are opened and closed by opening and closing the arm 19a by the cylinder 22 and the synchronous gear 19d. The support rollers 19b and 19c are V-shaped rollers in which a concave V-groove is formed at an intermediate position in the axial direction so that the plug rod 5 and the raw tube 8 can be easily guided along the extrapolation center and the extraction center. Is preferably used. Further, a V-shaped cradle 19f is provided between the upper and lower support roller mechanisms 19 in order to guide the plug rod 5 and the raw tube 8 along the extrapolation center and the extraction center.

  The left and right support roller mechanism 20 includes a rod support that clamps the tip of the plug rod 5 from the left and right directions when the element tube 8 is inserted into the plug rod 5, and a position close to the die 3 when the element tube 8 is pulled out. Is a roller mechanism that also serves as a raw tube support that holds and guides from the left and right directions.

  Further, as shown in FIG. 1, the left and right support roller mechanism 20 is reciprocally movable in the front-rear direction with a reciprocating width of about 300 mm to 500 mm, for example, so as to protrude forward from the front end portion of the back bench 6 by the cylinder 23. When the rod is supported, the front end of the plug rod 5 is clamped and guided close to the clamp piece 10a on the raw tube supply base 2 side, and when the raw pipe is supported, the die 3 on the raw pipe drawing base 4 side is approached. The tube 8 can be pinched and guided.

  Further, as shown in FIG. 5, the left and right support roller mechanism 20 includes a pair of left and right roller support plates 24a and 24b, two support rollers 25a to 25d arranged in the front-rear direction on each roller support plate, Opening / closing means 26 for opening and closing both support plates in parallel and in parallel is provided.

  The support rollers 25a to 25d are V-shaped rollers in which a concave V-groove is formed at an intermediate position in the axial direction so that the plug rod 5 and the raw tube 8 can be easily guided along the extrapolation center and the extraction center. Is preferably used. The support rollers 25a to 25d are rotatably supported at both ends of the plate-like roller support plates 24a and 24b. The roller support plates 24a and 24b are connected to the arms 29a and 29b of the opening / closing means 26 so as to be rotatable around the connecting shaft 34 at an intermediate position therebetween.

  The opening / closing means 26 is arranged on the left and right sides of the base tube 8 with respect to the extrapolation center, and meshes with each other, and the shaft center of the synchronization gear and an intermediate position between the support plates 24a and 24b. A main arm 29a and a slave arm 29b that are movably connected, an open / close cylinder 30 that is connected to an extended portion of the main arm and rotates the main arm 29a, and a front side of the rotation center of the roller support plates 24a and 24b. A tension coil spring 31 as an urging means connected so as to urge both the support plates 24a and 24b toward each other, and the roller support plates 24a and 24b on the rear side of the rotation centers of the roller support plates 24a and 24b. An arc-shaped guide hole 33 formed in 24 b and a pin 32 provided on the arms 29 a and 29 b so as to be fitted in the guide hole 33 are provided.

  When the pin 32 is fitted into the guide hole 33, the rotation range of the support plates 24a and 24b is restricted, and the two rows of rollers are always set to open and close in parallel.

  As shown in FIGS. 2 and 3, the plug set device 21 holds the rear end of the plug rod 5, moves in the front-rear direction along the back bench 6, and the cylinder that moves the holding piece 36. 37. The holding piece 36 reciprocates in the front-rear direction within a range indicated by a solid line and a two-dot chain line in FIG.

  In the above configuration, the tube 8 is pulled out as follows. First, the raw tube 8 is extrapolated to the plug rod 5. In order to automatically extrapolate the raw tube 8 to the plug rod 5, as shown in FIG. 1A, the back bench 6 is raised by the lifting device 15 and set to the raw tube extrapolation position A, and left and right supported. The roller mechanism 20 and the plug setting device 21 are advanced to bring the plug rod 5 closer to the raw tube supply base 2 side.

  At this time, both the left and right support roller mechanisms 20 and the upper and lower support roller mechanisms 19 are configured to support and guide the plug rod 5 in a closed posture. On the other hand, on the raw tube supply base 2 side, the clamping device 10 holds the rear end portion of the raw tube 8 supplied by the supply device. At this time, as will be described later, the raw pipe is supplied to the raw pipe supply base 2 so that the pipe end of the supplied raw pipe 8 remains in the clamp piece 10a.

  Then, as shown in FIG. 1B, the clamp device 10 is retracted by the cylinder 9 and inserted into the plug 11 at the tip of the plug rod. At this time, in the clamp device 10, when the tube end of the raw tube 8 is gripped, the tube end is left in the clamp piece 10a, and the plug 11 is guided into the clamp piece 10a. Therefore, the plug rod 5 and the raw tube 8 are both inserted in the clamp piece 10 a while being guided, and the raw tube 8 can be reliably inserted into the plug rod 5. In addition, since the pipe end of the raw pipe 8 is held so as to remain in the clamp piece 10a, it is extrapolated to the plug 11 without being affected by variations in the length of the raw pipe, even when many pipes are pulled out. Can do.

  Next, as shown in FIG. 1C, the rear end of the raw tube 8 is pressed backward by the pusher device 40, and the raw tube 8 is extrapolated to the plug rod 5. At this time, the left and right support roller mechanism 20 is also retracted as the plug setting device 21 is retracted. Further, the vertical support roller mechanism 19 and the left and right support roller mechanism 20 are opened so that the extrapolation of the raw tube 8 is performed smoothly, or the outer diameter of the raw tube 8 is set to smoothly guide the raw tube 8. Also take a closed posture.

  When the extrapolation of the tube 8 is completed, the back bench 6 is then lowered to the tube extraction position B as shown in FIG. Then, as shown in FIG. 1 (e), the plug set device 21 and the left and right support roller mechanism 20 are moved forward while the raw tube 8 is sandwiched from the upper and lower and left and right by the left and right support roller mechanism 20 and the upper and lower support roller mechanism 19, and The support roller mechanism 20 is brought close to the drawing die 3. Then, if the leading portion of the raw tube 8 is gripped by the carriage 12 through the die 3, the tip of the raw tube is gripped by the carriage 12 and travels in the pulling direction, the raw tube 8 is pulled out. At this time, since the left and right support roller mechanism 20 approaches the die 3 as much as possible, the guide of the raw tube 8 to the die 3 is smoothly performed, and a stable drawing process can be automatically performed.

  When the drawing of the raw tube 8 is completed, the state is returned to the state shown in FIG. 1A, and the extrapolation and drawing work of the raw tube 8 supplied to the raw tube supply base 2 is repeated.

  As described above, in this embodiment, the vertical support roller mechanism 19 and the left / right support roller mechanism 20 having simple mechanisms sandwich the plug rod 6 from the vertical / left / right directions when the base tube 8 is extrapolated to the plug rod 5. Thus, the bending of the plug rod 5 can be suppressed, and the raw tube 8 can be extrapolated in a stable state, and the raw tube 8 is supported and guided in a stable state from the vertical and horizontal directions when the raw tube 8 is pulled out. be able to.

  Further, since the left and right support roller mechanism 20 supports and guides the raw tube 8 at a position close to the die 3 when the raw tube is pulled out, the raw tube 8 can be guided to the die in a stable state.

  Furthermore, since the rod support or the support of the tube is continuously performed by the rotating support roller mechanism with respect to the plug rod or the tube that continuously moves in the drawing direction or the extrapolation direction, it is interrupted by the clamp mechanism. Unlike typical gripping operations, smooth guidance can be performed. And since it is the system clamped and guided by the support roller from the outer side of a rod or a raw pipe, it can employ | adopt regardless of the magnitude | size of the rod diameter and the outer diameter of a raw pipe.

  Note that the present invention is not limited to the above-described embodiment, and it is needless to say that many modifications and changes can be made within the scope of the present invention. For example, in the above embodiment, the tube extrapolation position and the tube extraction position are set in the vertical direction, but may be set in the horizontal direction. That is, the back bench may not be moved up and down, but may be reciprocated in the left-right direction to set the tube extrapolation position and the tube extraction position in the left-right direction. The support rollers of the left and right support roller mechanism are set in two rows in the front-rear direction, but may be set in three or more rows.

(A)-(e) is schematic explanatory drawing which shows from the pipe | tube extrapolation process to the pipe | tube extraction process in the pipe | tube extraction system which is embodiment of this invention Plan view showing the back bench of the blank tube drawing system A side view of the back bench Top view showing the positional relationship between the left and right support roller mechanism and the clamping device (A) is a plan view showing the open posture of the left and right support roller mechanism, (b) is a plan view showing the closed posture of the left and right support roller mechanism Front view of the left and right support roller mechanism viewed from the raw tube supply side

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Element pipe supply stand 3 Die 4 Element pipe drawing stand 5 Plug rod 6 Back bench 8 Element tube 9 Cylinder 10 Clamping device 10a Clamp piece 10b Support roller 40 Pusher device 40a Pressing piece 11 Plug 12 Carriage 15 Lifting device 16 Cylinder 17 Pantograph 18 Lifting table 19 Vertical support roller mechanism 21 Plug set device 23 Cylinder 24a, 24b Roller support plate 25a-25d Support roller 28a, 28b Synchronous gear 29a Main arm 29b Sub arm 30 Opening / closing cylinder 31 Tension coil spring 36 Holding piece 37 Cylinder

Claims (5)

In order to extrapolate the raw pipe supplied from the raw pipe supply base to the plug rod and to insert the raw pipe extrapolated to the plug rod into the die side of the raw pipe drawing base, Switchable to and from the tube extraction position, extrapolate the tube supplied to the tube supply base to the plug rod on the back bench, and plug the die and the front end of the plug rod at the tube extraction position on the back bench A raw pipe automatic drawing system that passes the raw pipe between the pipe and the chuck on the raw pipe drawing stand and pulls the raw pipe.
A left and right support roller mechanism disposed at the front end portion of the back bench and a plurality of vertical support roller mechanisms disposed on the back bench at intervals in the front-rear direction are provided. And at least a pair of support rollers that serve both as a rod support that supports and guides the plug rod when the raw tube is extrapolated, and a raw tube support that supports and guides the raw tube when the raw tube is pulled out. Automatic pipe drawing system. A plug set device that holds the rear end of the plug rod and moves the plug rod in the front-rear direction is provided at the rear end portion of the back bench. 2. The automatic pulling-out system according to claim 1, wherein the left and right support roller mechanism is provided so as to be able to project forward, and is movable in the front-rear direction at a front end portion of a back bench. 3. The raw pipe automatic drawing system according to claim 1, wherein the left and right support roller mechanism includes a pair of left and right support rollers arranged in two rows in the drawing direction of the pipe. The left and right support roller mechanism includes a pair of left and right roller support plates, two support rollers arranged in the pulling direction on each roller support plate, and an opening and closing mechanism that opens and closes both support plates in a rotatable manner and in parallel. The automatic pipe drawing system according to claim 3, further comprising: means. A clamping device having a pair of clamp pieces capable of gripping the rear end portion of the raw tube is provided at the rear portion of the raw tube supply base, and the clamping device is movable in the front-rear direction in the direction of extrapolation of the raw tube. The automatic pipe drawing system according to claim 1, wherein a tip plug of the plug rod can be interposed between the clamp pieces at a rear position thereof.

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