JP4708508B1 - Fully automatic pipe bender - Google Patents

Abstract

A fully automatic pipe bender that can significantly reduce the time required for the processing cycle and produce pipe products extremely efficiently.
The pipe bender 1 according to the present invention includes a bending unit 3 that performs bending and a cutter unit 2 that cuts the raw material pipe material P1 and supplies the material pipe material P1 to the bending unit 3. The bending unit 3 includes: a bending device 12; The cutter unit 2 includes a feeding device 5, a cutter device 8, an insertion clamp 9, and a stopper 11. The cutter device 8 is disposed in front of the feeding device 5, and the insertion clamp 9 is It is arranged in front of the cutter device 8 and is movable along the supply line L, and the stopper 11 is arranged in front of the insertion clamp 9 from the position where the supply line L is blocked to the position where it is opened. It is configured to be movable.
[Selection] Figure 1

Description

  The present invention relates to a bending apparatus for a metal pipe, and in particular, from a raw material pipe material wound in a coil shape, through a process such as straightening, constant feed, cutting, bending, product discharge, etc. The present invention relates to a pipe bender that continuously and fully automatically manufactures pipe products bent into a shape.

  A pipe bender 31 as shown in FIG. 6 is known as an apparatus for continuously and fully automatically producing a pipe product bent into a desired shape from a raw material pipe material wound in a coil shape. . The pipe bender 31 includes a cutter unit 32 and a bender unit 33, as shown in FIG.

  The cutter unit 32 includes a straightening correction device 34, a feeding device 35, and a cutter device 38. By driving the feeding device 35, the raw material pipe material P1 is drawn from the coil 46, and the straightening correction device 34 adjusts the raw material pipe material P1. The straight pipe is straightened and supplied to the bender 33, and then the raw material pipe material P1 is cut by the cutter device 38.

  The bender section 33 includes a bending device 42, a stripper device 44, and a cored bar device 45. The bending device 42 drives the bending device 42 to bend the raw material pipe material P1 (cut pipe P2) cut by the cutter device 38. The pipe product P3 is discharged by the stripper device 44 after being processed.

  More specifically, the pipe product P3 can be continuously manufactured by bending the raw material pipe material P1 by sequentially executing the following steps.

(Preparation for starting)
First, as shown in FIG. 6 (1), the raw material pipe material P 1 is pulled out from the coil 46, its tip is passed between the grooved rollers of the straightening correction device 34, and the upper and lower portions of the feeding device 35 are Install it in the proper position between the endless belts. In this state, the feeding device 35 is driven, and the raw material pipe material P1 is further pulled out from the coil 46, and sent out until the leading end of the raw material pipe material P1 reaches the cutter device 38. The raw material pipe material P1 drawn out from the coil 46 is straightened when passing through the straightening straightening device 34.

(Insertion process)
From the state shown in FIG. 6 (1), the feeding device 35 is further driven, and as shown in FIG. 6 (2), the leading end of the raw material pipe material P1 passes through the bending device 42, and the stripper device 44. The raw material pipe material P1 is sent forward until it hits. At this time, the clamp die 42b and the pressure die 42c of the bending device 42 are both open, and the cutting pipe P2 is inserted into an appropriate position of the bending device 42. When the insertion of the raw material pipe material P1 is completed, the clamp die 42b is closed, and the raw material pipe material P1 is sandwiched and fixed by the foamed roll 42a and the clamp die 42b. When the raw material pipe material P1 is inserted into the bending device 42, the cored bar device 45 inserts the cored bar 45a into a predetermined position in the raw material pipe material P1 (inside the bent portion).

(Cutting process)
When the fixing of the material pipe material P1 by the foamed roll 42a and the clamp die 42b is completed, the cutter device 38 is driven to cut the material pipe material P1. Then, as shown in FIG. 6 (3), the entire cutter unit 32 is retracted to a position where it does not interfere with the bending process.

(Bending process)
When the cutter portion 32 is retracted, the rear end side of the cutting pipe P2 is sandwiched and fixed while the front end side of the cutting pipe P2 is pressed by the pressure die 42c of the bending device 42 as shown in FIG. 6 (4). By rotating the formed roll 42a and the clamp die 42b by a predetermined angle (forward rotation), the cutting pipe P2 is bent to produce a pipe product P3.

  When the bending process is completed, the clamp die 42b and the pressure die 42c are opened to release the fixing of the pipe product P3, the cored bar 45a is returned to the original position by the cored bar device 45, and the stripper unit 44 is moved to the side of the bending unit 42. Move to. Then, the pipe product P3 is pushed out from the bending apparatus 42 and discharged, and is conveyed outside the apparatus by a conveying means (not shown). Then, the stripper device 44 is returned to the original position, and the foamed roll 42a and the clamp die 42b are reversely rotated to return to the original position. Further, the cutter unit 32 that has been moved backward is moved forward and returned to the original position.

JP 2008-126268 A JP-A-6-328177

  The conventional pipe bender 31 as shown in FIG. 6 performs bending processing on the raw material pipe material P1 by sequentially repeating a series of steps (processing cycle) including the above-described insertion step, cutting step, and bending step. Thus, the pipe product P3 can be manufactured continuously and fully automatically. However, the pipe bender 31 in FIG. 6 has room for improvement in terms of processing speed, and improvement in manufacturing efficiency is desired by shortening the time required for processing cycles.

  The present invention has been made to solve the above-described problems, and is configured so that the next round cutting process can be performed while bending is performed in the bender portion. It is an object of the present invention to provide a fully automatic pipe bender that can significantly reduce the time required for manufacturing and can manufacture pipe products extremely efficiently.

  The pipe bender according to the present invention is a pipe bender configured by a bending unit that performs bending and a cutter unit that cuts a raw material pipe material and supplies the material to the bender unit, and the bending unit includes a bending device, and It has a stripper device, the cutter unit has a feeding device, a cutter device, an insertion clamp, and a stopper, and the cutter device is in front of the feeding device (in the feed pipe material or cutting pipe supply direction, that is, the bender unit). The insertion clamp is arranged in front of the cutter device (in the direction of the supply destination of the raw material pipe material or the cutting pipe, that is, on the bender side), and is configured to be movable along the supply line. Is arranged in front of the insertion clamp and is configured to be movable from a position for blocking the supply line to a position for opening. It is characterized in.

  In the above pipe bender, the feed device is driven in a state where the stopper blocks the supply line and the insertion clamp is opened, and the tip of the raw material pipe material passes through the cutter device and the insertion clamp. The raw material pipe material is sent out until it hits the stopper, then the insertion clamp is closed and the raw material pipe material is fixed, the cutting process is performed by cutting the raw material pipe material by operating the cutter device, and the stopper opens the supply line , Move the insertion clamp holding the cutting pipe to the bender part side, insert the cutting pipe into the proper position of the bending device, then open the insertion clamp and return the insertion clamp to the cutting position A pipe product is manufactured by bending the insertion process and the cutting pipe inserted into the bending apparatus, and the And a bending process for discharging the manufactured pipe product, and in this case, the cutting process of the next round is performed in the cutter unit while the bending process is performed in the bender unit. Is preferably executed.

  The pipe bender according to the present invention can significantly reduce the time required for the machining cycle as compared with a conventional pipe bender, and can manufacture a pipe product extremely efficiently. Further, in the pipe bender according to the present invention, when the cutting pipe is inserted into the bending apparatus, it is not necessary to abut the tip of the cutting pipe against the stripper apparatus, and problems such as end deformation and breakage of the stripper apparatus can be avoided. Moreover, the amount of wear in the stripper device can be reduced.

FIG. 1 is a side view of a pipe bender 1 according to the first embodiment of the present invention. FIG. 2 is an explanatory diagram of a cutting process executed in the pipe bender 1 of FIG. FIG. 3 is an explanatory diagram of an insertion process executed in the pipe bender 1 of FIG. FIG. 4 is an explanatory diagram of a bending process executed in the pipe bender 1 of FIG. FIG. 5 is a flowchart of a series of steps executed in the pipe bender 1 of FIG. 1 and the conventional pipe bender 31 of FIG. FIG. 6 is an explanatory diagram of an insertion process, a cutting process, and a bending process executed in the conventional pipe bender 31.

  Hereinafter, an embodiment of the “fully automatic pipe bender” of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side view of a pipe bender 1 according to the first embodiment of the present invention. The pipe bender 1 basically includes a cutter unit 2 and a bender unit 3.

  The cutter unit 2 draws out the raw material pipe material P1 from the coil 16 disposed on the opposite side of the bender unit 3 and straightens it, cuts it at a predetermined length, and cuts the cut pipe (cut pipe P2). ) To the bender unit 3, and includes a straightening correction device 4, a feeding device 5, and an insertion device 6. On the other hand, the bender part 3 performs a bending process on the cutting pipe P <b> 2 supplied from the cutter part 2, and includes a bending device 12, a stripper device 14, and a cored bar device 15.

  The straightening correction device 4 is disposed at a position closest to the coil 16 on the gantry 2a of the cutter unit 2, and is provided between grooved rollers in which a plurality of raw material pipe materials P1 drawn from the coil 16 are arranged at a predetermined interval. It is comprised so that it can correct to straight shape by letting pass. The feeding device 5 is disposed in front of the straightening straightening device 4 (in the direction of the supply destination of the raw material pipe material P1 or the cutting pipe P2, that is, the bender part 3 side, the left side in FIG. 1), The raw material pipe material P1 is sandwiched from above and below, and the endless belts are driven, whereby the raw material pipe material P1 is drawn from the coil 16 and fed forward at a predetermined timing.

  The insertion device 6 is for cutting the raw material pipe material P1 drawn out from the coil 16 into a predetermined length and inserting the raw material pipe material P1 into an appropriate position of the bender portion 3, and on the frame 2a of the cutter portion 2 It is arranged at a position closest to the vendor section 3. The insertion device 6 includes a base 7, a cutter device 8, an insertion clamp 9, a tip clamp 10, a stopper 11, and a plurality of guides 13 (a rear guide 13a and a front guide 13b). Of these, the base 7 is configured to be movable along the supply line L of the raw material pipe material P1 and the cutting pipe P2 from the position in the vicinity of the feeding device 5 to the position in the vicinity of the bender portion 3 on the gantry 2a. ing. Further, the cutter device 8, the insertion clamp 9, and the guide 13 are configured to be movable along the supply line L on the base 7.

  The cutter device 8 is disposed at a position near the feeding device 5 on the base 7 and is configured to cut the raw material pipe material P1. The insertion clamp 9 is disposed in front of the cutter device 8 and has a function of fixing the raw material pipe material P1 when the raw material pipe material P1 is cut by the cutter device 8, and the cutting pipe P2 toward the bender portion 3 after cutting. It has a function to send out.

  The front end clamp 10 is disposed in front of the insertion clamp 9 and has a function of fixing the raw material pipe material P1 at the time of cutting. Further, the stopper 11 is disposed at a position closest to the bender portion 3 on the base 7 (in front of the tip clamp 10 and the insertion clamp 9), and more specifically, at the lowered position so as to be movable in the vertical direction. The supply line L is shut off, and the supply line L is opened at the raised position. Before the raw material pipe material P1 is cut, the tip of the raw material pipe material P1 fed from the feeding device 5 is stopped at the lower position stopper 11. , The feed is stopped, and the material pipe material P1 to be cut is positioned in the positional relationship with the cutter device 8.

  The rear guide 13a is disposed on the rear side of the cutter device 8, and has a function of guiding the raw material pipe material P1 to an appropriate position between the cutter device 8 and the feeding device 5, and the front guide 13b is an insertion clamp. 9 and has a function of guiding the raw material pipe material P1 to an appropriate position between the insertion clamp 9 and the tip clamp 10.

  The bending device 12 includes a foam roll 12a, a clamp die 12b, a pressure die 12c, a servo motor (not shown), and the like, and forms one end side of a cutting pipe P2 inserted from the cutter unit 2 at an appropriate position. The cutting pipe P2 can be bent by rotating the foam roll 12a and the clamp die 12b by a predetermined angle (for example, 180 °) while being sandwiched and fixed by the roll 12a and the clamp die 12b. It is like that.

  The stripper device 14 is for discharging the pipe product P3 manufactured by bending the cut pipe P2 from the bending device 12. The cored bar device 15 moves the cored bar inside the cutting pipe P2. The cored bar is inserted into the cutting pipe P2 for the purpose of avoiding abnormal deformation in the bent part when the bending device 12 performs the bending process.

  Here, a method of continuously manufacturing the pipe product P3 by bending the raw material pipe material P1 using the pipe bender 1 according to the present embodiment will be described.

(Preparation for starting)
First, as shown in FIG. 1, the raw material pipe material P1 is pulled out from the coil 16, and the tip is passed between the grooved rollers of the straightening straightening device 4. Further, between the upper and lower endless belts of the feeding device 5 Attach to the proper position. In this state, the feeding device 5 is driven to further pull out the raw material pipe material P1 from the coil 16, and the raw material pipe material P1 is sent out until it passes through the rear guide 13a and reaches the cutter device 8. The raw material pipe material P1 drawn out from the coil 16 is straightened when passing through the straightening straightening device 4.

(Cutting process)
As shown in FIG. 2 (1), in the state where the stopper 11 is lowered (that is, the state where the supply line L is shut off) and the insertion clamp 9 and the tip clamp 10 are both opened, the feeding device 5 is operated. As shown in FIG. 2 (2), the raw material pipe material P 1 passes through the cutter device 8, the insertion clamp 9, the front guide 13 b, and the front end clamp 10 until the material pipe is abutted against the stopper 11. The material P1 is sent out.

  Then, when the raw material pipe material P1 hits the stopper 11, the feeding by the feeding device 5 is stopped, and as shown in FIG. 2 (3), the insertion clamp 9 and the tip clamp 10 are closed, and the raw material pipe material P1 is fixed. . Next, the cutter device 8 is operated, and the raw material pipe material P1 is cut at a predetermined position. At this time, the cutter device 8 is set at a position away from the stopper 11 by a predetermined distance so that the cutting pipe P2 has a predetermined length.

(Insertion process)
When the cutting is completed, as shown in FIG. 3 (1), the stopper 11 is raised to open the supply line L, and the insertion clamp 9 is opened. Then, as shown in FIG. 3B, the base 7 is moved to the bender part 3 side, and then the insertion clamp 9 is closed. Next, as shown in FIG. 3 (3), the tip clamp 10 is opened, and the insertion clamp 9 holding the cutting pipe P2 on the base 7 is further moved to the bender part 3 side.

  At this time, both the clamp die 12b and the pressure die 12c of the bending device 12 are open, and the cutting pipe P2 is inserted into an appropriate position of the bending device 12. When the insertion of the cutting pipe P2 is completed, the clamp die 12b is closed, and the cutting pipe P2 is sandwiched and fixed by the foamed roll 12a and the clamp die 12b. When the cutting pipe P2 is inserted into the bending device 12, the cored bar device 15 inserts the cored bar 15a into a predetermined position (inside the bent portion) in the cutting pipe P2.

  Subsequently, as shown in FIG. 3 (4), the insertion clamp 9 is opened, the base 7 is moved to the feeding device 5 side, and returned to the position at the time of cutting. Further, the insertion clamp 9 is also moved to the feeding device 5 side on the base 7 and returned to the position at the time of cutting. Finally, the stopper 11 is lowered and the supply line L is shut off.

(Bending process)
As shown in FIGS. 4 (1) and 4 (2), a foam in which the leading end side of the cutting pipe P2 is pressed by the pressure die 12c of the bending device 12 and the rear end side of the cutting pipe P2 is sandwiched and fixed. By rotating the roll 12a and the clamp die 12b by a predetermined angle (forward rotation), the cutting pipe P2 is bent to produce a pipe product P3. When the bending process is completed, as shown in FIG. 4 (3), the clamp die 12b and the pressure die 12c are opened to release the fixing of the pipe product P3, and the core bar 15a is returned to the original position by the core bar device 15. Returning, as shown in FIG. 4 (4), the stripper device 14 is moved to the bending device 12 side. Then, the pipe product P3 is pushed out from the bending apparatus 12 and discharged, and is conveyed outside the apparatus by a conveying means (not shown). Then, the stripper device 14 is returned to the original position, and the foamed roll 12a and the clamp die 12b are reversely rotated to return to the original position.

  In the pipe bender 1 according to the present embodiment, the above-described cutting process, insertion process, and bending process are automatically executed by a control device (not shown). And the pipe product P3 can be continuously manufactured by bending the raw material pipe material P1 by repeating a series of steps including the above-described cutting step, insertion step, and bending step. However, each process is not performed in order, but after the second round, the cutting process is performed simultaneously with the bending process of the previous round. That is, the cutting process of the next round is performed in the cutter unit 2 while the bending process is performed in the bender unit 3.

  In the conventional pipe bender 31 shown in FIG. 6, the cutting process is performed after the raw material pipe material P1 is inserted into the bending apparatus 42. In the section 32, the cutting process cannot be executed, and there is nothing but waiting. Accordingly, as shown in FIG. 5 (2), the cutting process is performed after the insertion process is completed, the bending process is performed after the cutting process is completed, and the next round is performed after the bending process is completed. The insertion process must be performed.

  On the other hand, in the pipe bender 1 of the present embodiment, as is clear from FIG. 5 (1), the cutting process of the next round is performed in the cutter unit 2 while the bending process is performed in the bender unit 3. In addition, since the time required for the cutting process is almost the same as the time required for the bending process, the time required for each round (one cutting process, It is not necessary to add the time required for the cutting process when calculating the time required for a series of processes consisting of one insertion process and one bending process, that is, the time required for the insertion process and the bending process. The total time required for each round can be used as the time required for each round, and the time required for the cutting process (about 30 to 40% of the total) is shortened compared to the conventional pipe bender 31 shown in FIG. To do It can be.

  Further, in the conventional pipe bender 31, when the raw material pipe material P 1 is inserted into the bending device 42, the leading end of the raw material pipe material P 1 is abutted against the stripper device 44, so that deformation occurs at the front end of the raw material pipe material P 1. However, in the pipe bender 1 of this embodiment, when the cutting pipe P2 is inserted into the bending device 12, the tip of the stripping device 44 is pushed into the stripper device 14. There is no need to hit, and problems such as end deformation and breakage of the stripper device 14 can be avoided, and the amount of wear can be reduced.

1,31: Pipe bender,
2, 32: Cutter part,
2a: frame,
3, 33: Vendor part,
4, 34: Straightening correction device,
5, 35: Feeder,
6: Insertion device,
7: Base,
8, 38: Cutter device,
9: Insertion clamp,
10: Tip clamp,
11: Stopper,
12, 42: bending apparatus,
12a, 42a: foam roll,
12b, 42b: clamp die,
12c, 42c: pressure die,
13: Guide,
13a: rear guide,
13b: front guide,
14, 44: stripper device,
15, 45: cored bar device,
15a, 45a: cored bar,
16, 46: Coil,
P1: Raw material pipe material,
P2: cutting pipe,
P3: Pipe products

Claims (5)

A pipe bender configured by a bending section that performs bending and a cutter section that cuts a raw material pipe material and supplies the material to the bender section,
The bender part has a bending device and a stripper device,
The cutter unit has a feeding device, a cutter device, an insertion clamp, and a stopper,
The cutter device is disposed in front of the feeding device,
The insertion clamp is arranged in front of the cutter device and is configured to be movable along the supply line;
The pipe bender is characterized in that the stopper is arranged in front of the insertion clamp and is movable from a position where the supply line is blocked to a position where the supply line is opened. In the state where the stopper blocks the supply line and the insertion clamp is opened, the feed device is driven, and the tip of the raw material pipe material passes through the cutter device and the insertion clamp, and Cutting the raw material pipe material until it hits the stopper, then closing the insertion clamp and fixing the raw material pipe material, operating the cutter device to cut the raw material pipe material,
In the state where the stopper opens the supply line, the insertion clamp holding the cutting pipe is moved to the bender part side, and the cutting pipe is inserted into an appropriate position of the bending apparatus, and then the insertion is performed. An insertion step of opening the clamp and returning the insertion clamp to the position at the time of cutting;
A pipe product is manufactured by bending a cut pipe inserted into the bending device, and a bending step of discharging the manufactured pipe product is performed by the stripper device. The pipe bender according to claim 1.   3. The pipe bender according to claim 2, wherein a cutting process of a next round is performed in the cutter unit while a bending process is performed in the bender unit. 4. A method of continuously bending a pipe using the pipe bender according to claim 1,
In the state where the stopper blocks the supply line and the insertion clamp is opened, the feed device is driven, and the tip of the raw material pipe material passes through the cutter device and the insertion clamp, and Cutting the raw material pipe material until it hits the stopper, then closing the insertion clamp and fixing the raw material pipe material, operating the cutter device to cut the raw material pipe material,
In the state where the stopper opens the supply line, the insertion clamp holding the cutting pipe is moved to the bender part side, and the cutting pipe is inserted into an appropriate position of the bending apparatus, and then the insertion is performed. An insertion step of opening the clamp and returning the insertion clamp to the position at the time of cutting;
A pipe bending process comprising: bending a cut pipe inserted in the bending apparatus to manufacture a pipe product, and performing a bending process of discharging the manufactured pipe product by the stripper apparatus. Method.   5. The pipe bending method according to claim 4, wherein a cutting process of the next round is performed in the cutter unit while a bending step is performed in the bender unit. 6.

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