JP3082413B2 - Discharge side processing equipment of cold working machine and cold tube rolling equipment provided with the discharge side processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold working machine which discharges a long work material in the axial direction to a work machine output side, and cuts the long work material to a required length. The present invention relates to an outlet processing facility of a cold working machine and a cold tube rolling apparatus provided with the outlet processing facility.

[0002]

2. Description of the Related Art As a cold working machine for discharging a long work material in an axial direction to a working machine exit side, for example, there is a cold pilger mill. The cold pilger mill is used for manufacturing a high-precision seamless pipe, and discharges a rolled pipe having a length according to the length of the raw pipe and the working degree to the outlet side. Here, the longer the maximum pressure is, the better from the viewpoint of tube making efficiency and the like.

On the other hand, the rolled tube discharged from the cold Pilger mill undergoes various post-treatments. The pipe length that can be accepted by the post-processing equipment is generally shorter than the maximum pressure extension, and the transfer to the post-processing equipment becomes difficult if the pipe length is not reduced below a certain level. Therefore, in general, a cold pilger mill produces a rolled tube as long as possible, cuts the tube to a required length on the outlet side of the mill, and transports the tube to the next step. When the rolling tube is cut, an end surface treatment such as chamfering is required, but this is also usually performed on the exit side of the mill.

[0004] In such a cold pilger mill on the outlet side, a disc cutter is used as a material cutter. This cutter presses a plurality of disc-shaped blades from around the pipe or other material to be cut, and in this state, the blades revolve around the material axis to cut the material, and there is no spark when cutting. Having. It can be said that a cold pilger mill using a large amount of rolling oil is indispensable for ensuring safety. However, since this cutter can carry in the material only in the axial direction, it must be arranged in the vertical feed line for the material.

[0005] It is needless to say that the material vertical feed line needs to be as short as possible in order to use the equipment yard effectively in any equipment.

FIG. 1 shows a layout that is frequently used in the outlet processing equipment of a cold pilger mill. M is a cold working machine, L
Reference numeral 1 denotes a vertical feed line (first vertical feed line) for a long work material discharged from the cold working machine M, C denotes a material cutter for cutting the long work material 2, and F denotes a chamfering machine. is there. The material cutter C is provided immediately on the exit side of the cold working machine M, and the chamfering machines F, F are connected to the first vertical feed line L1.
Are arranged at both ends of the second vertical feed line L2 arranged side by side. The cutting is performed by stopping the discharge of the material when the length of the long workpiece at the exit side of the material cutter C reaches the required cutting length. The cut material is supplied to the second vertical feed line L
2 and are chamfered on both ends by the chamfering machines F, F, and dropped into the racks R arranged side by side on the second vertical feed line L2.

[0007]

In the outlet processing equipment shown in FIG. 1, since the discharge of the material is stopped when the material is cut, the maximum pressure extension is not limited. Further, the total length of the first vertical feed line L1 can be reduced to the maximum required cutting length lmax. Further, there is an advantage that the material cutter C and the chamfering machines F, F are close to the cold working machine M, and an operator operating the cold working machine M can easily operate the material cutter C and the chamfering machines F, F. This is very important now that work is being streamlined.

However, when the cold working machine M is, for example, a cold pilger mill, the temporary stop of the material discharge means the temporary stop of the rolling, and when the rolling is temporarily stopped in the middle, the caliber roll cools during this time. The outer diameter of the rolling becomes large in the initial stage of the rolling restart, which causes a decrease in dimensional accuracy of the rolling tube. This reduction in dimensional accuracy is caused by, for example, SU SU with an outer diameter of 57 mm and a wall thickness of 5.7 mm.
In the case of S304 steel pipe, the average is about +0.2 mm, which is within the current tolerance (± 0.25 mm). However, the tolerance may exceed the tolerance if other factors for lowering the accuracy are added or if the tolerance becomes more severe. Yes, it is necessary to change the equipment layout immediately.

The layout requirements required for the outlet processing equipment of a cold working machine are as follows when the cold working machine is a cold Pilger mill.

[0010] The maximum pressure extension is increased without temporarily stopping the rolling. Reduce the total length of equipment on the exit side of the processing machine.
It is possible to cope with a material cutter such as a disk cutter in which material is carried in only in the axial direction. In the case of a material cutter in which the material can be carried in from the side by a kicker or the like, the layout configuration is easy because there is no need to pass the material through the cutter. Bring the edge processing machine such as the material cutter and chamfering machine close to the cold working machine.

It is an object of the present invention to provide an outlet processing facility of a cold working machine and a cold tube rolling mill provided with the outlet processing facility which can satisfy these requirements at a high level.

[0012]

SUMMARY OF THE INVENTION A first outlet processing equipment of the present invention is provided at an outlet side of a cold working machine for discharging a long work material in an axial direction, and the maximum demand for the long work material is provided. Discharge side processing equipment of a cold working machine that cuts to a cutting length or less, which is provided on an extension of the cold working machine following the outlet thereof, and whose total length is equal to or greater than a maximum pressure extension Lmax of a long work material. A first vertical feed line and a second vertical feed line provided adjacent to the first vertical feed line and having a total length equal to or greater than the maximum pressure extension Lmax and the maximum required cutting length lmax of the long work material. And a material cutter installed in the second vertical feed line and at a distance from the cold working machine substantially equal to the maximum pressure extension Lmax, and capable of carrying in the material only in the axial direction. I do.

[0013] In the first delivery side processing equipment of the present invention, a third vertical feed line is juxtaposed to a portion of the second vertical feed line on the delivery side of the material cutter for end face processing, and the third vertical feed line is provided. A pair of end face machines can be provided at both ends of the line.

[0014] The second delivery side processing equipment of the present invention is provided on the delivery side of a cold working machine that discharges a long workpiece in the axial direction, and cuts the long workpiece into a maximum required cutting length or less. This is an outlet processing equipment of a cold working machine, which is provided on an extension of the cold working machine following the outlet of the cold working machine and has a total length of a maximum pressure extension Lmax and a maximum required cutting length lmax of a long workpiece. A first vertical feed line that is equal to or greater than the total, and a second vertical feed line that is provided adjacent to the first vertical feed line and that has a total length equal to or greater than the maximum pressure extension Lmax and the maximum required cutting length lmax of the long workpiece. A vertical feed line, and a material cutter installed in the second vertical feed line and at a distance from the cold working machine substantially at the maximum required cutting length lmax and capable of carrying in the material only in the axial direction. It is characterized by the following.

[0015] In the second delivery side processing equipment of the present invention, a third vertical feed line is juxtaposed to a part of the second vertical feed line on the input side of the material cutter for end face processing, and the third vertical feed line is provided. A pair of end face machines can be provided at both ends of the line.

Further, the cold tube rolling apparatus according to the present invention is arranged such that the first delivery side processing equipment or the second delivery side equipment described above is provided at the delivery side of the cold pilger mill.
Out-side processing equipment.

[0017]

FIG. 2 is a layout diagram of a second outlet processing facility of the present invention, and FIG. 3 is a layout diagram of a first outlet processing facility of the present invention. The reference numerals in the figure are the same as those in FIG. 1, M represents a cold working machine, L1 to L3 represent a material vertical feed line, C represents a material cutter (discutter), F represents an end face processing machine, and R represents a drop-in rack. I have.

The first outlet processing equipment of the present invention shown in FIG. 3 employs a layout in which the first priority is given to not stopping the material rolling halfway. That is, the cold working machine M
A first vertical feed line L1 for temporarily receiving a long work material discharged from the machine is provided on the exit side of the cold working machine M, and a second vertical feed line L2 for cutting is provided beside the first vertical feed line L1. The total length of the first vertical feed line L1 corresponds to the maximum pressure extension Lmax, and the total length of the second vertical feed line L2 is (Lmax + maximum required cutting length lmax, without considering the length of the material cutter C). )
Becomes The material cutter C is provided at a position Lmax from the processing machine outlet of the second vertical feed line L2. The third vertical feed line L3 is juxtaposed to a portion of the second vertical feed line L2 that is on the output side of the material cutter C.

The long workpiece transferred from the first vertical feed line L1 to the second vertical feed line L2 passes through the material cutter C and is sent forward, and is not more than the maximum required cutting length lmax by the material cutter C. Is cut off. The cut material is transferred to the third vertical feed line L3, the cut surface is processed by the end face processing machines F, F, and dropped into the rack R. The remaining material also passes through the material cutter C, and is dropped into the rack R after the cut surface processing.

[0020] Total length L of equipment allowed as outlet processing equipment
₀ is 45 m, the maximum required cutting length lmax is 15 m, and if the length of the material cutter C is not considered, a maximum pressure extension Lmax of 30 m is secured for the time being. However, the material cutter C is as far as 30 m from the cold working machine M, and further to the end face processing machine F farther from the material cutter C, as far as 45 m from the cold working machine M. In this case, it is difficult for the operator who operates the cold working machine M to concurrently manage the material cutter C and the cut surface working machines F, F.

Therefore, in the second delivery side processing equipment of the present invention, as shown in FIG. 2, the second vertical delivery line L2 is located next to the first vertical delivery line L1 provided on the delivery side of the cold working machine M. Is provided. A material cutter C is provided in the second vertical feed line L2 at a position substantially at the maximum required cutting length lmax from the cold working machine M. A third vertical feed line L3 is juxtaposed to a portion L2a of the second vertical feed line L2 on the entrance side (the cold work machine M side) of the material cutter C. End face machines F, F are disposed at both ends of the third vertical feed line L3.

In the work, the long work material that has been discharged from the cold working machine M to the first vertical feed line L1 is once advanced to the front of the material cutter C (to the right in FIG. (2) Transfer to the vertical feed line L2. Next, the long work material is reversed and passed through the material cutter C to obtain the maximum required cutting length l.
Cut below max. The cut material is transferred to the third vertical feed line L3, and both end faces are processed by the end face processing machines F, F, and then dropped into the rack R1. The remaining material is also passed through the material cutter C and dropped into the rack R1 after processing by the end face processing machine F. The pressure extension is the maximum required cutting length lmax
In the following, those which do not require cutting are dropped from the first vertical feed line L1 to the rack R2 via the second vertical feed line L2.

In the second discharge side processing equipment of the present invention, the first vertical feed line L1 for receiving the long work material discharged from the cold working machine M is provided, so that the material is cut when the material is cut. There is no need to stop discharge. The long work material received in the first vertical feed line L1 is advanced to the end of the material cutter C. If the maximum pressure extension Lmax is 30 m and the maximum required cutting length lmax is 15 m, the total equipment length L ₀ is It can be reduced to 45 m, which is the same as the equipment in FIG. In other words, these points are the same as those in the equipment of FIG.
The max, is acceptable from a substantially facilities overall length L ₀ to a length obtained by subtracting the maximum required cut length lmax (L ₀ -lmax). Then, the material cutter C and the end face processing machines F, F
For the installation position, the distance from the cold working machine M to the material cutter C is the maximum required cutting length lmax, and the distance from the cold working machine M to the end face processing machines F, F is the maximum required cutting length even at a long distance. Length lmax, and both are cold working machines M
Approach significantly.

Table 1 summarizes the lengths of the outlet processing facilities shown in FIGS. Equipment total length L ₀ is 45 m, maximum required cut length lmax is a 15 m, the length of material the cutter C is not considered. The outlet processing equipment (the first equipment and the second equipment) of the present invention has no significant defects in the product and can effectively utilize the space on the outlet side of the cold working machine. Moreover, the second aspect of the present invention
The outgoing side processing equipment is a material cutter C and end face processing machines F, F
Approach the cold working machine M, and are excellent in these operability.

[0025]

[Table 1]

The most rational layout of the second exit processing equipment of the present invention is that the total length of the first vertical feed line L1 is approximately three times the maximum required cutting length lmax and the second vertical feed line L2
L2b in front of the material cutter C (right side in FIG. 2)
Is approximately twice the maximum required cutting length lmax. According to this layout, the maximum pressure extension Lmax can be twice the maximum required cutting length lmax, and the maximum pressure extension Lmax can be reduced.
The maximum required cutting length lma per cut of long workpieces of max
x can be bisected.

The second outlet processing equipment of the present invention was adopted as the outlet processing equipment of the cold pilger mill, and the layout shown in Table 2 was adopted. The material cutter is a three-blade disk cutter, and the end face processing machine is a chamfering machine called facing. The maximum pressure extension Lmax of 38 m was secured for the total length of the equipment of 60 m. This equipment has an outer diameter of 57 mm and a wall thickness of 5.7 mm.
Although the US304 steel pipe was processed, no increase in the outer diameter due to roll cooling was observed because there was no stoppage during the rolling. When the same pipe was processed by the conventional equipment shown in FIG. 1, rolling was stopped every 19 m, which is the maximum required cutting length lmax.
The outer diameter is increased by roll cooling over a range of 600 mm every 19 m, and the deviation of the peak from the target outer diameter is 0.2 mm on average for 500 rolls, and the largest is 0.4 mm.
mm. When two cold Pilger mills were operated by one person, the operator was able to manage each disk cutter and facing with sufficient margin, and a two-man system was established.

[0026]

[Table 2]

[0027]

As is apparent from the above description, the first and second outlet processing facilities of the present invention do not require a temporary stop of the material discharge when cutting the material. Does not reduce the dimensional accuracy of the material. The maximum machining length can be increased with respect to the permissible total equipment length, which contributes to improved machining efficiency and reduced equipment space. Use of a material cutter in which material is carried in only in the axial direction increases the safety of the cutting operation.

In addition to the above, in the second outlet processing equipment of the present invention, the material cutter and the end face processing machine are brought closer to the cold working machine, and the working efficiency is improved and the work is rationalized.

Further, the cold tube rolling apparatus of the present invention is provided with the first discharge processing equipment or the second discharge processing equipment of the present invention as the discharge processing equipment of the cold pilger mill,
A roll tube of high dimensional quality can be manufactured, and it is relatively small and has excellent work safety. In particular, those equipped with the second outlet processing equipment are excellent in workability.

[Brief description of the drawings]

FIG. 1 is a layout diagram of a conventional outlet processing facility.

FIG. 2 is a layout diagram showing a configuration example of a second outlet processing facility of the present invention.

FIG. 3 is a layout diagram showing a configuration example of a first outlet processing facility of the present invention.

[Explanation of symbols]

 M Cold working machine L1 First vertical feed line L2 Second vertical feed line L3 Third vertical feed line C Material cutter F End face processing machine R Rack

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B21B 21/00-21/04 B21B 15/00 B21B 39/12 B21B 43/00

Claims (6)

(57) [Claims] 1. A discharge side processing equipment of a cold working machine which is provided on an output side of a cold working machine for discharging a long work material in an axial direction and cuts the long work material to a maximum required cutting length or less. And
A first vertical feed line which is provided on an extension of the cold working machine following the outlet thereof and whose total length is equal to or greater than the maximum pressure extension Lmax of the long work material; and a first vertical feed line which is provided adjacent to the first vertical feed line. A second vertical feed line whose total length is equal to or greater than the sum of the maximum pressure extension Lmax and the maximum required cutting length lmax of the long workpiece;
And a material cutter installed in the second vertical feed line and at a distance from the cold working machine at substantially the maximum pressure extension Lmax, and capable of carrying in the material only in the axial direction. Discharge side processing equipment of cold working machine. 2. A third vertical feed line juxtaposed to a portion of the second vertical feed line on the output side of the material cutter;
The outlet processing equipment of a cold working machine according to claim 1, further comprising a pair of end processing machines disposed at both ends of the vertical feed line. 3. A discharge side processing equipment of a cold working machine which is provided on an output side of a cold working machine for discharging a long work material in an axial direction and cuts the long work material to a maximum required cutting length or less. And
A first vertical feed line which is provided on an extension of the cold working machine and which is provided on the extension thereof and whose total length is equal to or more than the sum of the maximum pressure extension Lmax and the maximum required cutting length lmax of the long workpiece;
A second vertical feed line provided adjacent to the vertical feed line and having a total length equal to or greater than the maximum pressure extension Lmax and the maximum required cutting length lmax of the long work material; The distance from the cold working machine is approximately the maximum required cutting length lmax
And a material cutter that can be loaded only in the axial direction. 4. A third vertical feed line juxtaposed to a portion of the second vertical feed line on the input side of the material cutter;
The outlet processing equipment of a cold working machine according to claim 3, further comprising a pair of end face processing machines disposed at both ends of the vertical feed line. 5. The outlet processing equipment of a cold working machine according to claim 1, wherein the cold working machine is a cold pilger mill. 6. The cold working machine according to claim 1, 2, 3 or 4, wherein a cold working machine comprising a cold pilger mill is provided with an outlet processing equipment. Pipe rolling equipment.