JP4201912B2 - Pipe end treatment equipment for welded pipe - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a pipe end processing apparatus used when cutting and separating a pipe end of a welded pipe sent from a pipe making line.
[0002]
[Prior art]
The welded pipe is manufactured by welding both ends in the width direction of a metal strip formed into an open pipe shape by roll forming or rollless forming. After welding, bead cutting is performed to smooth the surface of the tube, followed by cooling through a cooling process. The welded pipe that has been cut to a certain size is sent to a conveying table, and a number of welded pipes are translated along a direction perpendicular to the pipe axis.
In the middle of the transfer table, a pipe end processing device is arranged for cutting the pipe end whose shape is not stable and making the welded pipe the product length. As shown in FIG. 1, the conventional pipe end processing apparatus is provided with a pair of clamp pieces 1 a and 1 b located at a position one step down from the conveying line of the welded pipe P. One clamp piece 1 a is fixed to the machine base 2, and the other clamp piece 1 b can be approached or separated from the fixed clamp piece 1 a by a clamp cylinder 3. An arm 5 having a cylinder 4 rod attached to one end is swingably provided on the machine base 2, and a rotating grindstone 7 driven by a motor 6 is provided near the other end of the arm 5.
The welded pipe P that has been sent along the transfer line is once lowered from the transfer line along the moving direction D indicated by the arrow and is positioned between the clamp pieces 1a and 1b. The welded pipe P is clamped between the clamp pieces 1a and 1b by driving the clamp cylinder 3 to bring the movable clamp piece 1b closer to the fixed clamp piece 1a. Next, the rotary grindstone 7 is rotated by the power from the motor 6 and is lowered by the swing of the arm 5, and the pipe end of the welded pipe P is cut and separated.
[0003]
[Problems to be solved by the invention]
A large amount of dust is generated when the pipe ends are cut, deteriorating the working environment. Therefore, in the conventional equipment, the entire apparatus is covered with a dustproof cover so that the generated dust is not scattered around. However, the dustproof cover needs to be provided with an elevating mechanism in order to send the welded pipe P between the clamp pieces 1a and 1b and to send the welded pipe P subjected to the pipe end processing to a lower process.
Since the dust-proof cover that covers the entire apparatus is large in size, a large lifting mechanism is required. In addition, since dust is collected and collected by the dust-proof cover having a large internal volume, it is necessary to use a high-capacity dust collector, and the dust collection efficiency is also reduced. Furthermore, as indicated by the arrow in the moving direction D, a mechanism for lowering the welded pipe P from the conveying line once and raising it to the conveying line after the pipe end processing is also required.
[0004]
[Means for Solving the Problems]
The present invention has been devised to solve such problems, and is replaced with a dustproof cover that covers the pipe end portion, and along a conveying line that does not require the welded pipe to be lowered and raised during the pipe end processing. It is an object of the present invention to provide a pipe end processing apparatus that is structured and simplified by adopting the moving system, improving dust collection efficiency during pipe end processing, maintaining a good working environment.
In order to achieve the object, the present invention is a pipe end processing apparatus provided in the middle of a conveyance table for translating a plurality of welded pipes cut in a size by a pipe making line in a direction perpendicular to the pipe axis. A guide member fixed to the machine base and having an upper edge that is hollow and inclined downward, a vertically movable stopper disposed inside the guide member, and a vertically movable dust collecting cover that fits into the guide member; A clamper suspended from a mounting seat fixed to the dust collecting cover via a spring, and a rotating grindstone housed in the dust collecting cover, and a welded pipe to be treated at the end of the pipe being received by a stopper, and a guide It is characterized by being sandwiched between the upper edge of the member and the clamper.
The guide member preferably has an exhaust port that opens into the internal cavity and is connected to the suction exhaust system. If a pipe end receiver that can be raised and lowered is arranged on the side of the guide member, the pipe end separated from the welded pipe main body can be easily separated and recovered.
[0005]
Embodiment
In the pipe end processing apparatus according to the present invention, for example, as shown in FIG. The upper edge 11a of the guide member 11 is an inclined surface that becomes lower from the entry side toward the exit side (leftward in FIG. 2). The guide member 11 has a hollow inside, and an exhaust port 12 connected to the suction exhaust system opens to one side. Further, in order to easily drop the pipe end E separated from the welded pipe P, a pipe end receiver 15 that can be moved up and down is provided on the side of the guide member 11 as shown in FIG.
The machine base 10 is provided with an air cylinder 13, and a stopper 14 is connected to a rod of the air cylinder 13. When the rod of the air cylinder 13 is extended, the stopper 14 protrudes from the upper edge 11a of the guide member 11, and when the rod is drawn into the air cylinder 13, the stopper 14 retracts from the upper edge 11a of the guide member 11. Similarly, the tube end receiver 15 can be moved up and down by expansion and contraction of the rod of the air cylinder 16.
[0006]
A dust collection cover 20 is provided at a position facing the guide member 11 so as to be movable up and down. The dust collection cover 20 does not cover the entire apparatus as in the prior art, but has a size that fits into the guide member 11 so as to cover only the vicinity of the pipe end of the welded pipe P. Therefore, the internal volume of the dust collection cover 20 is remarkably small, and a large capacity dust collector is not required.
The dust collecting cover 20 can be moved in the vertical direction by an elevating cylinder 21, and a mounting seat 22 is fixed inside. A clamper 24 is suspended from the mounting seat 22 via a spring 23. The size of the clamper 24 is such that when the dust collection cover 20 is in the lowered position (broken line in FIG. 2), it is pressed against the welded pipe P by an elastic force, and the welded pipe P is clamped between the upper edge 11a of the guide member 11. And the positional relationship. A rotating grindstone 30 driven by an appropriate motor (not shown) is accommodated in the dust collection cover 20.
[0007]
The welded pipe P to be subjected to the pipe end processing is sent from the pipe forming line to the pipe end processing apparatus by a transfer table or the like. The welded pipe P rolls along the upper edge 11a of the guide member 11, and is held at a predetermined position by the stopper 14 at the raised position (solid line in FIG. 2). The moving direction D of the welded pipe P at this time is a straight line having no descending and ascending paths as shown in FIG.
The stop of the welded pipe P by the stopper 14 is detected by an appropriate position sensor. The raising / lowering cylinder 21 is driven in response to detection of the welded pipe P, and the dust collecting cover 20 is lowered from the raised position (solid line in FIG. 2) and is fitted into the guide member 11. As a result, the vicinity of both ends of the welded pipe P is sealed with the guide member 11 and the dust collecting cover 20.
[0008]
As the dust collecting cover 20 is lowered, the clamper 24 is pressed against the upper surface of the welded pipe P, and the welded pipe P is sandwiched between the guide member 11 and the clamper 24. When the dust collecting cover 20 is further lowered, the rotating grindstone 30 is pressed against the surface of the welded pipe P, and cutting of the pipe end is started. When the rotating grindstone 30 is lowered to the lowered position (broken line in FIG. 2), the pipe end E of the welded pipe P is cut and separated. Since both ends of the welded pipe P being cut are sandwiched between the guide member 11 and the clamper 24, the welded pipe P is cut by the rotating grindstone 30 in a stable state.
The cutting space is a small space surrounded by the guide member 11 and the dust collecting cover 20. Therefore, the dust generated at the time of cutting is efficiently discharged out of the system from the exhaust port 12 even if a dust collector having a small capacity is used. Further, since the amount of air exhausted with the dust is small, the dust removal efficiency of the exhaust is also improved.
[0009]
When the cutting and separation of the tube end E is completed, the dust collecting cover 20 is raised. As the dust collection cover 20 is raised, the pressing force of the clamper 24 against the welded pipe P is weakened. The pipe end E is released from restraint by the guide member 11 and the dust collecting cover 20, but is caught on the pipe end receiver 15 by a burr generated at the time of cutting. Therefore, when the pipe end receiver 15 is lowered, the pipe end E is separated from the welded pipe P main body and dropped and collected in the chip box 35. The welded pipe P from which the pipe end E has been cut is lowered to the stopper 14 and then sent to the next process to become a product steel pipe.
[0010]
【The invention's effect】
As described above, the pipe end processing apparatus of the present invention uses a dust collection cover that covers the vicinity of both ends of the welded pipe instead of the dust collection cover that covers the entire apparatus, and welds as the dust collection cover descends. The system that clamps the tube is adopted. Therefore, the apparatus configuration is greatly reduced in size and simplified in structure. Moreover, since the cutting part is covered with a dust collection cover having a small internal volume, a small dust collector can be used, and the dust collection efficiency is improved.
[Brief description of the drawings]
FIG. 1 shows a conventional pipe end processing apparatus. FIG. 2 shows a pipe end processing apparatus according to the present invention. FIG. 3 illustrates cutting a pipe end from a welded pipe (a) and collecting it in a chip box. Figure [Explanation of symbols]
10: Machine base 11: Guide member 11a: Upper edge 12: Exhaust port 13, 16: Air cylinder 14: Stopper 15: Pipe end holder 20: Dust collecting cover 21: Lifting cylinder 22: Mounting seat 23: Spring 24: Clamper 30 : Rotary grindstone 35: Chip box P: Welded pipe D: Moving direction of welded pipe E: Pipe end to be cut and separated

Claims (2)

A pipe end treatment device provided in the middle of a transfer table that translates a plurality of welded pipes cut to a certain size in a pipe making line in a direction perpendicular to the pipe axis. A guide member having an upper edge inclined downward, a vertically movable stopper disposed inside the guide member, a vertically movable dust collecting cover fitted into the guide member, and a mounting seat fixed to the dust collecting cover A clamper suspended from a spring via a spring and a rotating grindstone housed in a dust collection cover. The welded pipe to be treated at the end of the pipe is received by a stopper, and is clamped between the upper edge of the guide member and the clamper. Pipe end treatment equipment of welded pipe. The pipe end processing apparatus for a welded pipe according to claim 1, wherein an exhaust port that opens into an internal cavity of the guide member and is connected to a suction exhaust system is formed in the guide member.

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