WO2003047801A1

WO2003047801A1 - Equipment and method for cutting pipe

Info

Publication number: WO2003047801A1
Application number: PCT/JP2002/012591
Authority: WO
Inventors: Yuzuru Kadono; Masatoshi Okano; Michihiko Iwamoto
Original assignee: Mitsubishi Heavy Industries, Ltd.; Sumitomo Metal Industries, Ltd.
Priority date: 2001-12-03
Filing date: 2002-12-02
Publication date: 2003-06-12
Also published as: CN1503709A; JP2003170313A; KR20040018257A; TW200300715A; CN1317100C; TW570854B

Abstract

Steel pipe cutting equipment (1), comprising a plurality of cutting machines (9) for cutting a steel pipe (3a), a inlet table (5) for carrying in the steel pipe (3a) to the cutting machines (9), and an outlet table (6) for delivering the steel pipe (3a) cut by the cutting machines (9), the cutting machines (9), inlet table (5), and outlet table (6) further comprising a plurality of carrying rollers (10, 13, 16) for carrying the steel pipe (3a), wherein drive motors (11, 14) capable of controlling a rotational speed independently of each other and sensors (12, 15) for detecting the position of the carried steel pipe (3a) are fitted to the carrying rollers (10, 13) on the cutting machines (9) and the inlet table (5).

Description

Description Pipe cutting equipment and method

The present invention relates to a pipe cutting facility and method, and is applied to, for example, a cutting facility and a method for cutting and removing crops at both ends of a manufactured one steel pipe and cutting the steel pipe into a plurality of steel pipes of any length. . Background art

Fig. 8 shows a conventional pipe cutting facility.

It is a diagram showing the arrangement of the components of steel pipe cutting equipment 31 that simultaneously cuts and removes both ends of one manufactured steel pipe and simultaneously cuts a plurality of steel pipes of any length. The cutting line 2a for cutting a steel pipe such as a seamless steel pipe (hereinafter referred to as a pipe) 3a to a predetermined length with high efficiency by milling is provided with a cutting head 7 equipped with a metal saw. A plurality of cutting devices 9 equipped with a pipe clamp device 8 are installed in the longitudinal direction of the pipe 3a. One of the cutting devices 9 is fixed, and the other cutting device 9 is installed so as to be movable in the long axis direction of the pipe 3a in order to correspond to an arbitrary cutting length.

The above steel pipe cutting equipment 31 has one or more cutting line tables 4a having the above cutting lines 2a (hereinafter referred to as cutting tables) corresponding to the mill pipe production capacity. One cutting table 4a has a cutting line entrance table (hereinafter referred to as the entrance table) 5a and a cutting line exit table (hereinafter referred to as the exit table) 6 that plays the role of loading and discharging pipes. Are arranged before and after.

The cutting table 4a has a cutting line 2a on its upper surface, and transports a plurality of cutting devices 9 equipped with a cutting head 7 and a pipe clamp device 8 on the cutting line 2a, and a pipe 3a. Transport rollers 10 and the transport rollers It has one drive mode 11 for driving the la 10. The cutting table 4a conveys the pipe 3a on the cutting table 4a by linking all the conveying rollers 10 by one drive motor 11.

The entrance table 5a arranged on the pipe loading side of the cutting table 4a has a plurality of transport rollers 13 for transporting the pipe 3b and one drive for driving the plurality of transport rollers 13 And a motor 14. The entrance table 5a is moved by the single drive motor 14 so that all of the conveying ports 13 are linked to transfer the pipe 3b on the entrance table 5a to the cutting table 4a. Pipes are being brought in.

The outlet table 6 arranged on the pipe discharge side of the cutting table 4a also drives a plurality of transport rollers 16 for transporting the pipe and the plurality of transport rollers 16 like the inlet table 5a. For one drive motor 17. The inlet table 6 is driven by the single drive motor 17 so that all of the transport rollers 16 are linked, and the cut product pipes are discharged from the cutting table 4a to the outlet table 6, and the outlet table 6 6 is being transported.

The cutting table 4 a, the entrance table 5 a, and the exit table 6 each have one drive motor 11, 14, 17 for each table, and the transport rollers 10, 13 for pipes , 16 are driven to rotate by drive motors 11, 14, 17 independently for each table.

The cutting line 2a of the steel pipe cutting equipment 31 shown in Fig. 8 shows an example of removing a crop at both ends of one pipe and cutting it into five product pipes.

Pipes 3a and 3b are pipes to be cut, cutting line 2a is a cutting line of one line, and 6 cutting devices that remove cups at both ends and cut into 5 product pipes 9 are installed. The cutting line 2b has the same configuration as the cutting line 2a, and a plurality of lines are arranged in parallel as shown in Fig. 8 according to the mill pipe production capacity.

FIG. 9 is a view of the steel pipe cutting facility 31 as viewed from the side, and is a view showing a procedure of pipe cutting using the steel pipe cutting facility 31. As shown in FIG. FIGS. 9 (a) to 9 (d) show the state of cutting the pipes 3a, 3b, 3c along the time axis.

The pipe 3a manufactured by the mill is carried into the cutting table 4a from the entrance table 5a. On the cutting line 2a, align the leading crop cutting position with the cutting position of the fixed cutting device 9-1 and clamp with the pipe clamp device 8 mounted on the fixed cutting device 9-1. The other moving and cutting devices 9-1, 9-1, 9-4, 9-5, 9-6 move to the predetermined position according to the predetermined product pipe length, and the fixed cutting device 9-1 pipe clamp Simultaneously with the operation of the device 8, the pipe 3a is clamped by the pipe clamping device 8 mounted on each of the moving and cutting devices 91-2 to 9-6. At this time, the following pipe 3b is transported to the upper side of the entrance table 5a, where it stands by until the preceding pipe 3a is cut and discharged (FIG. 9 (a)).

Next, the cutting heads 7 of the six cutting devices 91 to 91 to 16 are simultaneously operated to cut the pipe 3a (FIG. 9 (b)).

Next, the cuts 18 and 19 of the cut pipe 3a are separated and removed, and are discharged and conveyed by the outlet table 6 (FIG. 9 (c)).

Next, when the cut pipe 3a is discharged to the output table 6, the subsequent pipe 3b is carried from the input table 5a to the cutting table 4a. At this time, when changing the length of the product pipe of the pipe 3b to be cut (setup change), move the moving cutting device 9-1-2 to 9-16 before loading the pipe 3b into the cutting line 2a. Do. The subsequent pipe 3c is conveyed to the entrance table 5a in the same manner as the pipe 3b, where it waits until the preceding pipe 3b is cut and discharged (Fig. 9

(d)). Thereafter, the same procedure as that for the pipe 3a is repeated to cut and discharge the pipe 3c and the like.

FIG. 10 shows another conventional pipe cutting equipment.

The steel pipe cutting equipment 41 has the same basic configuration as the steel pipe cutting equipment 31 described above. However, in order to reduce equipment costs and improve the cutting impeachment rate, the number of cutting equipment 9 in one line is reduced to (n +1) / 2 (n: The number of product pipes that cut one pipe, and the fraction is rounded up) The number of pipes is reduced to one, and the gauge stopper 20 is added to the outlet table 6a. It is provided with a table. The steel pipe cutting equipment 41 in Fig. 10 is an example where the number of product pipes is n = 5.

FIG. 11 and FIG. 12 are views of the steel pipe cutting equipment 41 as viewed from the side, and are diagrams showing the procedure of pipe cutting using the steel pipe cutting equipment 41. FIG.

FIGS. 11 (a) to (c) and FIGS. 12 (a) to (c) show the state of cutting the pipes 3a, 3b, 3c along the time axis.

The pipe 3a manufactured by the mill is carried into the cutting table 4a from the entrance table 5a. On the cutting line 2a, the cutting position of the leading crop is adjusted to the cutting position of the fixed cutting device 9-1, and clamped by the pipe clamping device 8 mounted on the fixed cutting device 9-11. The other mobile cutting devices 9-2, 9-13 move to the predetermined positions according to the predetermined product pipe length, and simultaneously operate the moving cutting devices 9 of the fixed cutting device 9-11. 1. Clamp the pipe 3a with the pipe clamp device 8 mounted on 2, 9-3. At this time, the succeeding pipe 3b is transported to the upper side of the entrance table 5a, where it stands by until the preceding pipe 3a is cut and discharged (FIG. 11 (a)).

Next, the cutting heads 7 of the three cutting devices 91-1 to 9-3 are simultaneously operated to cut the nozzle 3a (FIG. 11- (b)).

Next, the cut pipes 3 a-1 and 3 a-2 separate and remove the crop 18, and are discharged and conveyed at the outlet table 6 a. At this time, the gauge stopper 20 is previously moved and fixed by the length of the product pipe 3a-3 from the fixed cutting device 9-1. Simultaneously with this discharging operation, the remaining head 3a-3 of the pipe 3a is brought into contact with the gauge stopper 20, and the movable cutting device 9-1, 9-3 is set in accordance with a predetermined product pipe length. Then, the pipe 3a is clamped by the pipe clamping device 8 mounted on each of the three cutting devices 9 (FIG. 11 (c)).

Next, again the above three cutting devices 9! The cutting heads 7 to 9-3 are simultaneously operated to cut the rest of the pipe 3a (Fig. 12 (a)).

Next, the cut pipes 3a-3, 3a-4, and 3a-5 separate and remove the crop 19, and are discharged and transported at the outlet table 6a (Fig. 12 (b)). ). P02 12591 Next, after the cut pipes 3a-3, 3a-4, 3a-5 are completely discharged, the subsequent pipe 3b is cut from the input table 5a to the cutting table 4a. It is carried to line 2a. The subsequent pipe 3c is transported to the upper side of the entry table 5a, where it waits until the preceding pipe 3b is cut off and discharged (FIG. 12 (c)). Thereafter, the same procedure as that for the pipe 3a described above is repeated to cut and discharge the nozzle 3c and the like 3c.

In the cutting line 2a of the above equipment, the subsequent pipe 3b waits on the entrance table 5a until the preceding pipe 3a is cut and completely discharged from the cutting line 2a. However, it cannot be carried into the cutting line 2a. Therefore, the cutting cycle is lengthened by the carry-in time from the standby position to the cutting position.

In the cutting line 2a in the above equipment, the rotation speed of the transport rollers is controlled to be constant by one drive motor for each table, so the transport speed is controlled between the tables by starting and stopping the pipe. If the cutting pipes are different and the cutting pipe is transported across two tables, slippage may occur between the pipes and the transport rollers at one table, and the transport rollers and the pipes may be damaged. Therefore, in order to avoid the above-mentioned damage, the transport method of discharging the pipe 3a on the cutting line 2a and then loading the next pipe 3b is adopted, so only the loading time from the standby position to the cutting position is taken. Cutting cycle lengthens. When changing the setup, after the cut pipe is completely discharged from the cutting line 2a, the setting of the cutting machine is changed and the next pipe is carried in. Become.

The present invention provides a pipe cutting facility and a method for solving the above problems, which have high cutting efficiency. Disclosure of the invention

A pipe cutting facility according to the present invention for solving the above-mentioned problems includes: a plurality of cutting means for cutting a pipe; a loading means for loading a pipe into the cutting means; and a discharging means for discharging a pipe cut by the cutting means. In the pipe cutting equipment having a plurality of transport rollers each of which transports a pipe, the cutting means and the loading means in the loading means The transport roller is provided with a drive unit capable of controlling the rotation speed independently of each other, and a tube position detecting unit for detecting a position of a tube to be transported.

The pipe cutting equipment according to the present invention for solving the above-mentioned problems is a pipe cutting equipment for cutting a pipe into a plurality of pipes, the pipe cutting equipment having a smaller number of cutting means than the number of pipes to be cut, and And a discharge means for discharging the pipe cut by the cutting means, wherein each of the means has a plurality of transport rollers for transporting the pipe. The conveyance roller in the loading means is provided with a driving means capable of controlling a rotation speed independently of each other, and a pipe position detecting means for detecting a position of a pipe to be conveyed.

In other words, the pipe can be cut using a small number of cutting means (n + 1) / 2 (rounded up) for the number n of pipes cut.

A method for cutting a pipe according to the present invention for solving the above-mentioned problems, comprising: In the above, a tube to be subsequently carried in is carried to a position immediately near the tube.

The pipe cutting method according to the present invention for solving the above-mentioned problems is a pipe cutting method for cutting a pipe by a cutting means, wherein the pipe cut in by the cutting means is subsequently discharged and discharged. Is transported to the cutting position of the pipe cutting means.

A pipe cutting method according to the present invention for solving the above-mentioned problems is a pipe cutting method for cutting a pipe by a cutting means, wherein the step of carrying the pipe to a cutting position of the cutting means is performed by the cutting means. During the loading and cutting of the pipe to be cut, or during the loading or cutting, the step of loading the pipe to be subsequently loaded to the vicinity of the pipe, and the step of discharging the pipe cut by the cutting means. And transferring the pipe to be transported to the cutting position of the pipe cutting means.

A pipe cutting method according to the present invention for solving the above-mentioned problems is characterized in that the method includes a step of changing a position of a plurality of cutting means during discharge of the pipe cut by the cutting means.

The method for cutting a pipe according to the present invention that solves the above-mentioned problems has the following advantages. In the method for cutting a pipe using a number of cutting means, the pipe to be subsequently loaded during the loading and cutting of the pipe to be cut by the cutting means, or during the loading or cutting of the pipe, It is featured to be brought into the nearest place.

A method for cutting a pipe according to the present invention that solves the above-mentioned problems is a method for cutting a pipe using a smaller number of cutting means than the number to be cut. During discharge of a part of a cut tube, cutting of a tube to be cut, or discharge of a part of a cut tube, a tube to be subsequently loaded is carried into the cutting position of the tube cutting means. And

A pipe cutting method according to the present invention for solving the above-mentioned problems is a pipe cutting method for cutting a pipe using a number of cutting means smaller than the number to be cut, wherein the pipe cut by the cutting means is being discharged. In addition, the pipe to be subsequently loaded is transported to the cutting position of the pipe cutting means.

A pipe cutting method according to the present invention for solving the above-mentioned problems is a pipe cutting method for cutting a cut tube using a smaller number of cutting means than the number to be cut, wherein the pipe is carried into a cutting position of the cutting means. During the loading and cutting of the pipe to be cut by the cutting means, and during the loading or cutting, and during the loading or cutting, a step of carrying in a pipe to be subsequently loaded to a position very close to the pipe; During the cutting of the pipe and the discharge of a part of the cut pipe or the cutting of the pipe to be cut or the discharge of a part of the cut pipe, the pipe to be subsequently loaded is transferred to the cutting position of the pipe cutting means. And a step of carrying in a pipe to be subsequently carried in to a cutting position of the pipe cutting means while the pipe cut by the cutting means is being discharged.

A pipe cutting method according to the present invention for solving the above-mentioned problems is characterized in that the method includes a step of changing a position of a plurality of cutting means during discharge of the pipe cut by the cutting means. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a diagram showing a configuration of a steel pipe cutting facility of a first example according to the embodiment of the present invention. FIG. 2 is a view showing a pipe cutting procedure using the steel pipe cutting equipment of the first example according to the embodiment of the present invention. (A)-(d) is a figure which shows the cutting procedure of a pipe along a time axis.

FIG. 3 is a diagram comparing the operation of the steel pipe cutting facility of the first example according to the embodiment of the present invention and the conventional steel pipe cutting facility along a time axis.

FIG. 4 is a diagram showing a configuration of a steel pipe cutting facility of a second example according to the embodiment of the present invention.

FIG. 5 is a view showing a pipe cutting procedure using the steel pipe cutting equipment of the second example according to the embodiment of the present invention. (A)-(c) is a figure which shows the cutting procedure of a pipe along a time axis.

FIG. 6 is a view showing a pipe cutting procedure using the steel pipe cutting equipment of the second example according to the embodiment of the present invention. (A) and (b) are diagrams showing a pipe cutting procedure along a time axis, and are the procedures after FIG. 5 (c).

FIG. 7 is a diagram comparing the operation of the steel pipe cutting facility of the second example according to the embodiment of the present invention and other conventional steel pipe cutting facilities along a time axis.

FIG. 8 is a diagram showing an arrangement of components of a conventional steel pipe cutting facility.

FIG. 9 is a diagram showing a procedure for cutting a pipe using conventional steel pipe cutting equipment. (A)-(d) is a figure which shows the cutting procedure of a pipe along a time axis. FIG. 10 is a diagram showing the arrangement of components of another conventional steel pipe cutting facility. FIG. 11 is a diagram showing a procedure for cutting a pipe using another conventional steel pipe cutting equipment. (A) to (c) are diagrams showing a pipe cutting procedure along a time axis. FIG. 12 is a diagram showing a procedure for cutting a pipe using other conventional steel pipe cutting equipment. . (A)-(c) is a diagram showing a pipe cutting procedure along a time axis, and is a procedure after FIG. 11 (c). BEST MODE FOR CARRYING OUT THE INVENTION

(Example 1) 1

FIG. 1 is a view showing a configuration of a pipe cutting facility according to a first embodiment of the present invention.

The cutting line 2a, 2b of the steel pipe cutting equipment 1 shown in Fig. 1 is an example of the configuration for removing one end of one pipe 3a and cutting it into five product pipes of any length. It is.

The steel pipe cutting equipment 1 is an improvement of the conventional steel pipe cutting equipment 31 so as to achieve the time reduction which is the object of the present invention. It has one or more cutting tables 4 with lines 2a, and one cutting table 4 is provided with an inlet table 5 which is a pipe carrying means and an outlet table 6 which is a discharging means. ing.

The cutting table 4 has a cutting line 2 a on its upper surface, and a plurality of cutting devices 9 equipped with a cutting head 7 equipped with a metal saw and a pipe clamp device 8 as cutting means on the cutting line 2 a. And a plurality of transport rollers 10 for transporting the pipe 3a. A drive motor 1 as a driving unit for driving the transport rollers 10 is provided at each of the plurality of transport ports 10. 1 and a sensor 12 as pipe position detecting means for detecting the position of the pipe 3a to be conveyed. The cutting device 9 can be moved in the longitudinal direction of the pipe 3a in accordance with the cutting length of the pipe 3a. Each of the transport rollers 10 is independently driven to rotate by a drive motor 11 to be driven. The pipe 3 a is transported on the cutting table 4.

The entrance table 5 arranged on the pipe entrance side of the cutting table 4 has a plurality of transport rollers 13 for transporting the pipe, and each of the plurality of transport rollers 13 has a transport roller 13. A driving module 14 as driving means for driving and a sensor 15 as pipe position detecting means for detecting the position of the pipe 3b to be conveyed are provided. Each of the transport rollers 13 is independently rotated by a drive motor 14 to carry the pipe 3 b into the cutting table 4. As the sensors 12 and 15, a non-contact sensor such as an optical sensor or a contact sensor such as a microswitch can be applied.

Discharge table 6, which is located on the pipe discharge side of cutting table 4, is As with the outlet table 6 of the cutting equipment 3 1, it has a plurality of transport rollers 16 for transporting pipes and one drive motor 17 for driving the transport rollers 16. All of the transport rollers 16 are linked by the one drive mode 17, and the cut product pipe is discharged from the cutting table 4 to the exit table 6 and transported on the exit table 6. are doing.

A specific difference from the conventional steel pipe cutting equipment 31 is that, in the cutting table 4, a plurality of transport rollers 10 have a drive motor 11 that can be independently controlled in rotation, and therefore each of them is independently provided. It is rotatable and has a sensor 12 that detects the position of the pipe 3a to be conveyed, so that the position of the pipe 3a is detected by each of the conveying rollers 10 and the position of the pipe 3a is detected. Control can be finer. Similarly to the cutting table 4 described above, also in the entrance table 5, the plurality of transport rollers 13 have the drive motors 14 that can independently control the rotation, so that each of them can be rotated independently. Further, by having the sensor 15 for detecting the position of the pipe 3b to be conveyed, the position control of the pipe 3b by each of the conveying rollers 13 can be made fine.

FIG. 2 is a view of the steel pipe cutting equipment 1 as viewed from the side, and is a diagram showing a procedure for cutting a pipe using the steel pipe cutting equipment 1. FIG.

FIGS. 2 (a) to 2 (d) show the state of cutting the pipes 3a, 3b, 3c along the time axis.

The pipe 3 a manufactured by the mill is carried into the cutting line table 4 from the entrance table 5. On the cutting line 2a, the leading crop cutting position is adjusted to the cutting position of the fixed cutting device 9-1, and is clamped by the pipe clamp device 8 mounted on the fixed cutting device 9-1. The other moving and cutting devices 9-2, 9-3, 9-4, 9-5 and 9-16 move to predetermined positions according to the predetermined product pipe length, and the pipes of the fixed cutting device 9-1. Simultaneously with the operation of the clamp device 8, the pipe 3a is clamped by the pipe clamp device 8 mounted on each of the moving and cutting devices 9-1 to 9-6. In synchronization with this operation, the following pipe 3b is driven while sensors 12 and 15 monitor the position of the leading end of pipe 3b and the position of the trailing end of preceding pipe 3a. It controls the moving motors 11 and 14 and carries it in close proximity to the preceding pipe 3a (front packing) (Fig. 2 (a)).

Next, the cutting heads 7 of the six cutting devices 9-1 1 to 916 are operated simultaneously to cut the pipe 3a (FIG. 2 (b)).

Next, the cut pipe 3a separates and removes the crops 18 and 19, and is discharged and conveyed by the outlet table 6 (FIG. 2 (c)).

In synchronization with this discharging operation, the subsequent pipe 3b, like the preceding pipe 3a, adjusts the cutting position of the first cup to the cutting position of the fixed cutting device 9-1, and the fixed cutting device 9-1 It is clamped by the pipe clamp device 8 mounted on 1. If the product pipe length of the succeeding pipe 3b is different from that of the preceding pipe 3a, the other moving cutting device 9-2-9-6 changes the position according to the predetermined product pipe length (step Replaced, changed to 4-pick in Fig. 2 (d)), fixed pipe cutting device 9-11 Pipe clamp device mounted on each movable cutting device 9_2 ~ 9-16 simultaneously with the operation of pipe clamp device 8 Clamp pipe 3b with 8. Further, while monitoring the position of the pipes 3b and 3c with the sensors 12 and 15, the succeeding pipe 3c is controlled and controlled by the drive motors 11 and 14 to be brought in close proximity to the pipe 3b. 2 Fig. (D) From then on, the same procedure as for the preceding pipe 3a is repeated to cut and discharge the pipe 3c.

In the above-mentioned steel pipe cutting equipment 1, the procedure of using six cutting machines 9 to remove the cups at both ends of one steel pipe and simultaneously cut five steel pipes of arbitrary length was explained. However, the number of cutting machines 9 may be increased or decreased according to the target number of steel pipe cuts. Fig. 3 compares the operation of the steel pipe cutting equipment 1 with the operation of the conventional steel pipe cutting equipment 31 along the time axis to show the effect.

The time required for cutting the pipe varies depending on the diameter of the pipe Φ, wall thickness t, number of samples n, etc. The required time under the above conditions is 60 seconds in total for one pipe, carrying in = 20 seconds, cutting = 20 seconds, and discharging = 20 seconds. From Fig. 3, in the conventional steel pipe cutting equipment 31, the preceding pipe 3 a is cut, the discharge, complete discharge, and then the subsequent pipe 3 b is carried in. However, the operations of the preceding pipe 3a and the following pipe 3b are not performed synchronously. Therefore, the time required for the entire cutting cycle is simply (loading time + cutting time + discharging time) X number of cuts.

On the other hand, in the steel pipe cutting equipment 1, when the preceding pipe 3a is carried into the cutting position, the succeeding pipe 3b is carried in close to the preceding pipe 3a in synchronization with this carrying-in operation (primary). Carry-in), the subsequent pipe 3b is carried into the cutting position in synchronization with the discharge of the cut-off preceding pipe 3a (secondary carry-in), and when the discharge of the preceding pipe 3a is completed, the succeeding pipe 3b Can start cutting immediately. Further, when the preceding pipe 3a is discharged, the succeeding pipe 3c has already been brought in close proximity to the preceding pipe 3b, and at the same time as the cut pipe 3b is discharged, the following pipe 3c is carried to the cutting position. be able to. As a result, the primary loading time of the subsequent pipes after the pipe 3b is within the cutting cycle time of the preceding pipe, and the time required for the primary loading and the time required for the secondary loading are largely reduced. . Compared to the conventional steel pipe cutting equipment 31, the steel pipe cutting equipment 1 saves 18 seconds per cutting cycle of one pipe, and about one third of the time required for one pipe cutting cycle is reduced. It has been shortened.

In addition, when the setup change due to the change of the product pipe length becomes necessary, the steel pipe cutting equipment 1 can perform the setup change within the discharge time of the preceding pipe. The time required for replacement can be reduced, and the time required for the cutting cycle can be further reduced.

(Example 2)

FIG. 4 is a diagram showing a configuration of a pipe cutting facility according to a second embodiment of the present invention.

The steel pipe cutting equipment 21 shown in FIG. 4 is used for removing the both ends of one pipe 3a and cutting it into n product pipes.The configuration of one cutting line is a cutting device (n + 1). / 2 (fractions are rounded up) and one gauge stopper It is an example.

The configuration of the steel pipe cutting equipment 21 is an improvement on the conventional steel pipe cutting equipment 41 so as to achieve the time reduction which is the object of the present invention, and is similar to the conventional steel pipe cutting equipment 41. In addition, one or more cutting tables 4 having cutting lines 2a are provided, and one cutting table 4 has an inlet table 5 for pipe carrying-in means and an outlet table 6 for discharging means in front of and behind it. Are located.

The cutting table 4 has a cutting line 2a on its upper surface, and a cutting head 7 equipped with a metal saw and a pipe clamp device 8 are mounted on the cutting line 2a as cutting means (n + 1) / 2 (fraction is rounded up) It has a cutting device 9 and a plurality of transport rollers 10 for transporting the pipe, and drives the transport rollers 10 to each of the plurality of transport ports 10. And a sensor 12 as pipe position detecting means for detecting the position of the pipe 3a to be conveyed. The cutting device 9 can be moved in the longitudinal direction of the pipe 3a in accordance with the cutting length of the pipe 3a, and each of the transport rollers 10 is independently driven to rotate by a drive motor 11. Thus, the pipe 3 a is transported on the cutting table 4.

The entrance table 5, which is arranged on the pipe loading side of the cutting table 4, has a plurality of transport rollers 13 for transporting the pipes. A drive motor 14 as a driving means for driving 3 and a sensor 15 as a pipe position detecting means for detecting the position of the pipe 3b to be conveyed are provided. Each of the transport rollers 13 is independently driven to rotate by a drive motor 14 to carry the pipe 3 b into the cutting table 4.

The outlet table 6a arranged on the pipe discharge side of the cutting table 4 has a plurality of transport rollers 16 for transporting the pipe, similar to the outlet table 6a of the conventional steel pipe cutting equipment 31. It is composed of one drive motor 17 for driving the plurality of transport ports 16 and a gage stopper 20 for stopping the pipe 3a at a predetermined position, and is cut from the cutting table 4. Waste products pipes. The concrete difference from the conventional steel pipe cutting equipment 41 is that the cutting table 4 The number of transport rollers 1◦ has a drive motor 11 that can be independently controlled for rotation, and therefore can be independently driven to rotate, and a sensor that detects the position of the pipe 3a to be transported. By having 12, the position of the pipe 3 a at each of the transport rollers 10 can be detected, and the position control of the pipe 3 a can be finely controlled. Similarly to the cutting table 4 described above, also in the entrance table 5, the plurality of transport rollers 13 have the drive motors 14 that can independently control the rotation, so that each of them can be rotated independently. Further, by having the sensor 15 for detecting the position of the pipe 3b to be conveyed, the position control of the pipe 3b at each of the conveying ports 13 can be finely controlled.

FIGS. 5 and 6 are views from the side of the steel pipe cutting equipment 21 and show the procedure of cutting pipes using the steel pipe cutting equipment 21. FIG.

FIGS. 5 (a) to (c) and FIGS. 6 (a) to (b) show the state of cutting the pipes 3a, 3b, 3c along the time axis.

The pipe 3 a manufactured by the mill is carried from the entrance table 5 to the cutting table 4. On the cutting line 2a, the leading crop cutting position is adjusted to the cutting position of the fixed cutting device 9-1, and is clamped by the pipe clamp device 8 mounted on the fixed cutting device 9-1. The other movable cutting devices 9-2, 9-13 move to predetermined positions according to the predetermined product pipe length, and move simultaneously with the operation of the pipe clamping device 8 of the fixed cutting device 9-11. The pipe 3a is clamped by the pipe clamp device 8 mounted on the cutting device 9-12, 9-3. In synchronization with this operation, the following motor 3b is connected to the drive motor 1 while monitoring the position of the front end of the pipe 3b and the position of the rear end of the preceding pipe 3a with sensors 12 and 15. Control 1 and 14 to bring them in close to the preceding pipe 3a (front-justified) (Fig. 5 (a)).

Next, the cutting heads 7 of the three cutting devices 91-1 to 9-3 are operated simultaneously to cut the pipe 3a (FIG. 5 (b)).

The cut pipes 3 a-1 and 3 a-2 separate and remove the crop 18, and are discharged and transported at the output table 6. During this time, the gauge stopper 20 is previously moved and fixed by the pipe length of the pipe 3a-3 from the fixed cutting device 9-11. This emission At the same time as the operation, the leading 3a-3 of the remaining pipe 3a is brought into contact with the gate collar 20 and the moving and cutting devices 9-2 and 9-3 are set in accordance with the predetermined pipe length. Then, the pipe 3a is clamped by the pipe clamp device 8 mounted on each of the three cutting devices 9. In addition, the succeeding pipe 3b is also carried in close to the preceding pipe 3a. Further, while monitoring the pipes 3b and 3c with the sensors 12 and 15, the succeeding pipe 3c is controlled and controlled by the drive motors 11 and 14 to be brought in close proximity to the preceding pipe 3b (Fig. 5 ( c)).

Next, the cutting heads 7 of the three cutting devices 91 to 9_3 are simultaneously operated again to cut the rest of the pipe 3a (FIG. 6 (a)).

The cut pipes 3 a-3, 3 a-4, and 3 a-5 separate and remove the crop 19, and are discharged and transported at the outlet table 6. In synchronization with this discharging operation, the subsequent pipe 3b, like the preceding pipe 3a, adjusts the cutting position of the first cup to the cutting position of the fixed cutting device 9-1, and the fixed cutting device 9-1 1 It is clamped by the pipe clamp device 8 mounted on the hull. If the product pipe length of the pipe 3b is different from the preceding pipe 3a, the other moving and cutting devices 9-2 and 9-3 move to the predetermined positions according to the predetermined product pipe length (setup change). At the same time as the operation of the pipe clamp device 8 of the fixed cutting device 9-1, the pipe 3b is clamped by the pipe clamp device 8 mounted on each of the movable cutting devices 9-1, 9-3. Further, while monitoring the pipes 3b and 3c with the sensors 12 and 15, the succeeding pipe 3c is controlled to control the driving motors 11 and 14 and is brought into the vicinity of the preceding pipe 3b (No. 6). Figure (b)).

Thereafter, the same procedure as that for the pipe 3a described above is repeated to cut and discharge the pipe 3c and the like.

In the above-mentioned steel pipe cutting equipment 21, the (n + 1) / 2 (fraction is rounded up) cutting machines 9 are used twice to remove the cups at both ends of one steel pipe, The situation of simultaneous cutting of steel pipes of length has been described. However, the number of cutting machines 9 and the number of cutting machines 9 used per steel pipe are not limited to those in the above embodiment. For example, (n + 1) / 3 (fraction Using a single cutting machine 9 three times The tube may be cut to the number of cuts.

Fig. 7 compares the operation of the steel pipe cutting equipment 21 with the conventional steel pipe cutting equipment 41 along the time axis and shows the effect.

The time required for cutting the pipe varies depending on the diameter of the pipe to be cut, the wall thickness t, the number of samples collected, etc.In the steel pipe cutting equipment 21, the diameter φ = 240 mm, the wall thickness t = 20 mm, the number of samples collected Since n = 5 pieces are taken and one pipe is cut in two times using three cutting devices 9, the time required for each pipe is as follows: loading = 20 seconds, cutting = 2 0 seconds, intermediate discharge = 10 seconds, cutting = 20 seconds, discharge = 10 seconds, totaling 80 seconds. .

As shown in Fig. 7, in the conventional steel pipe cutting equipment 41, the preceding pipe 3a is cut, and the cycle of carry-in / cut / discharge is repeated, in which the pipe 3b is carried in after the pipe 3a is completely discharged. However, the operations of the preceding pipe 3a and the following pipe 3b are not performed synchronously. Therefore, the time required for the entire cutting cycle is simply (loading time + cutting time + discharging time) X number of cuts.

On the other hand, in the steel pipe cutting equipment 21, the succeeding pipe 3 b is already carried in synchronization with the immediate vicinity of the preceding pipe 3 a when the preceding pipe 3 a is carried into the cutting position (primary delivery). Accompanying the first cutting of pipe 3a. During intermediate discharge, it moves in synchronization with preceding pipe 3a. Therefore, the succeeding pipe 3b is carried into the cutting position in synchronization with the discharge of the cut preceding pipe 3a (secondary carry-in). You can get started. Further, the subsequent pipe 3c has already carried a part of it on the cutting table 4 in synchronization with the discharge of the preceding pipe 3a, and at the same time as the discharge of the cut subsequent pipe 3b. The following pipe 3c is carried into the cutting position and can be cut. As a result, the time for the primary delivery of the pipes following the pipe 3b is within the time of the cutting cycle of the preceding pipe, and the time required for the primary delivery and the time required for the secondary delivery are largely reduced. It was done. Compared to the conventional steel pipe cutting equipment 41, the steel pipe cutting equipment 21 saves 18 seconds per cutting cycle of one pipe, and is about 1/1 of the time required for the cutting cycle of one pipe. 4 was shortened Become.

In addition, when the setup change due to the change of the product pipe length becomes necessary, the steel pipe cutting equipment 21 can change the setup within the discharge time of the preceding pipe. The time required for setup change can be reduced, and the time required for the cutting cycle can be further reduced.

In the above-described apparatus according to the present invention, a seamless steel pipe has been described as an example. However, the present invention can be applied to a welded steel pipe, and similar effects can be obtained. In addition, other tubular members can be used without being limited to steel pipes and the like.

According to the invention of claim 1 or claim 2, a plurality of cutting means for cutting the pipe, loading means for loading the pipe into the cutting means, and an outlet for discharging the pipe cut by the cutting means. Means for cutting a pipe, wherein each means has a plurality of transport rollers for transporting the pipe, or a pipe cutting equipment for cutting the pipe into a plurality of pipes, the number of which is smaller than the number of pipes to be cut. Cutting means, a loading means for loading a pipe into the cutting means, and a discharging means for discharging the pipe cut by the cutting means, wherein each of the means has a plurality of transport rollers for transporting the pipe. In the cutting equipment, it is preferable that a drive unit capable of controlling a rotation speed independently of each other and a pipe position detecting unit that detects a position of a pipe to be transported are provided for the transport rollers in the cutting unit and the loading unit. Specially designed pipe cutting equipment Therefore, the use of transfer ports that can be rotated independently of each other allows the next pipe to be loaded while the pipe is being cut or loaded and discharged, and the continuous processing of pipe cutting. In this way, wasted time for loading pipes can be reduced, and the time required for the cutting cycle can be shortened.

The effect of this reduction in time is also effective for pipe cutting equipment with fewer cutting machines to reduce equipment costs.

According to the invention of claim 3 or claim 7, there is provided a method of cutting a pipe by cutting the pipe with cutting means, or a method of cutting a pipe by using a number of cutting means smaller than the number to be cut. During the loading and cutting of the pipe to be cut by the cutting means, or during the loading or cutting, the pipe to be subsequently loaded is brought into the vicinity of the pipe. Because of the characteristic method of cutting pipes, the pipes to be cut next can be loaded during the loading of pipes and during cutting or during loading or cutting, and the pipes in the continuous processing of pipe cutting The waste time for loading the waste can be reduced, and the time required for the cutting cycle can be shortened.

In addition, this effect of shortening the time is also effective in a pipe cutting method in which the number of cutting machines is reduced in order to reduce equipment costs.

According to the invention of claim 4 or claim 9, in the method of cutting a pipe using a cutting means for cutting a pipe or the method of cutting a pipe using a number of cutting means less than the number to be cut. The pipe cutting method is characterized in that a pipe to be subsequently carried in is discharged to the cutting position of the pipe cutting means during discharge of the pipe cut by the cutting means. Then, the pipe to be cut next can be carried in, the wasteful time of loading the pipe in the continuous processing of pipe cutting can be reduced, and the time required for the cutting cycle can be shortened.

According to the invention of claim 5 or claim 10, a pipe cutting method for cutting a pipe by a cutting means, or a pipe cutting for cutting a pipe by using a smaller number of cutting means than the number to be cut. Loading a pipe to the cutting position of the cutting means; and loading the pipe to be cut by the cutting means during loading and cutting, or during loading or cutting, and subsequently loading the pipe. A pipe having a step of carrying the pipe to the nearest position, and a step of carrying a pipe to be subsequently loaded to a cutting position of the pipe cutting means while the pipe cut by the cutting means is being discharged. Since the method of cutting pipes is used, the pipes to be cut next can be loaded while the pipes are being cut or loaded and discharged.This reduces wasteful time of loading pipes in the continuous processing of pipe cutting. And the time required for the cutting cycle can be shortened.

According to the invention of claim 6 or claim 11, cutting of the pipe is performed by the cutting means. In the method for cutting a pipe or a pipe for cutting a pipe using a number of cutting means smaller than the number to be cut, the position of a plurality of cutting means may be changed during discharging of the pipe cut by the cutting means. This is a method for cutting pipes that includes a step of performing pipe cutting, so even if the cutting length of the pipe is changed during the continuous processing of pipe cutting, the position of multiple cutting machines is changed during the discharge of the pipe. Can be performed, the wasted time involved in changing the position of the cutting machine can be reduced, and the time required for the cutting cycle can be shortened. It is also effective to cut tubes with fewer cutting machines.

According to the invention of claim 8, in the pipe cutting method for cutting the pipe by using a number of cutting means smaller than the number to be cut, the cutting method includes: Pipe cutting characterized in that the pipe to be subsequently loaded is carried into the cutting position of the pipe cutting means while the part is being discharged or the pipe to be cut is being cut or while part of the cut pipe is being discharged. Because of this method, the next pipe to be cut can be carried in while the pipe is being cut and part of the pipe is being discharged or cut or the part of the pipe is being discharged. It is possible to reduce unnecessary time for loading the pipe in the continuous processing, and to shorten the time required for the cutting cycle. Industrial applicability

As described above, it is possible to reduce wasted time of loading a pipe in the continuous processing of the pipe cutting, and to shorten the time required for a cutting cycle. In addition, the effect of this time reduction is also effective in a pipe cutting facility with a reduced number of cutting machines in order to reduce equipment costs, and is suitable for a pipe cutting facility and a method with high cutting efficiency.

Claims

The scope of the claims

1. A plurality of cutting means for cutting a pipe, a loading means for loading a pipe into the cutting means, and a discharging means for discharging a pipe cut by the cutting means, wherein each of the means transports the pipe. In a pipe cutting facility having a conveying roller of

The transport roller in the cutting means and the carry-in means is provided with a drive means capable of controlling a rotation speed independently of each other, and a pipe position detecting means for detecting a position of a pipe to be transported. Cutting equipment.

2. A pipe cutting facility for cutting a pipe into a plurality of pipes, wherein the number of cutting means is smaller than the number of pipes to be cut, a loading means for transferring a pipe into the cutting means, and a cutting by the cutting means. Discharging means for discharging the pipe, wherein said means has a plurality of transport ports for transporting the pipe.

3. In the method of cutting a pipe in which the pipe is cut by a cutting means,

A pipe cutting method characterized in that a pipe to be subsequently loaded is loaded to the vicinity of the pipe while the pipe to be cut by the cutting means is being loaded and is being cut or is being loaded or cut.

4. In the method of cutting a pipe in which the pipe is cut by a cutting means,

A pipe cutting method, wherein a pipe to be subsequently carried in is carried into a cutting position of the pipe cutting means while the pipe cut by the cutting means is being discharged.

5. In the method of cutting a pipe, wherein the pipe is cut by a cutting means,

Loading the tube to the cutting position of the cutting means;

During the loading and cutting of the pipe to be cut by the cutting means, and during the loading or during the cutting, a step of loading a pipe to be subsequently loaded to a position immediately close to the pipe;

A step of carrying in a pipe to be subsequently carried in to a cutting position of the pipe cutting means during discharging of the pipe cut by the cutting means.

6. The method for cutting a pipe according to any one of claims 3 to 5, further comprising a step of changing a position of the plurality of cutting means while discharging the pipe cut by the cutting means. Characteristic tube cutting method.

7. A method of cutting a pipe, wherein the pipe is cut using a smaller number of cutting means than the number to be cut,

8. A method for cutting a pipe using a smaller number of cutting means than the number to be cut, the method comprising:

During the cutting of the pipe to be cut by the cutting means and the discharge of a part of the cut pipe, or the cutting of the pipe to be cut or the discharge of a part of the cut pipe, A method for cutting a pipe, which is carried into a cutting position of a pipe cutting means.

9. A tube cutting method for cutting a tube using a smaller number of cutting means than the number to be cut,

A pipe cutting method, wherein a pipe to be subsequently loaded is carried into a cutting position of the pipe cutting means while the pipe cut by the cutting means is being discharged.

10. In a tube cutting method in which the tube is cut using a smaller number of cutting means than the number to be cut,

Loading the tube to the cutting position of the cutting means;

During the loading and cutting of the pipe to be cut by the cutting means and during the cutting or during the loading or cutting, a step of loading a pipe to be subsequently loaded to a position immediately close to the pipe;

During the cutting of the pipe to be cut by the cutting means and the discharge of a part of the cut pipe, or the cutting of the pipe to be cut or the discharge of a part of the cut pipe, Transporting to the cutting position of the pipe cutting means;

Transferring the pipe to be subsequently loaded to the cutting position of the pipe cutting means while the pipe cut by the cutting means is being discharged.

11. The method for cutting a pipe according to any one of claims 7 to 10, wherein A method for cutting a pipe, comprising a step of changing a position of a plurality of cutting means during discharge of the pipe cut by the cutting means.