JPH09272011A - Simulatneous cutting method and device for bar end - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and device capable of cutting bars simultaneously at their respective places with two kinds of bars whose cutting end positions are different from each other. SOLUTION: With a first bar 7 with fish tail 70 and a second bar 8 with divided end part 80 arranged in parallel to each other, the two bars are conveyed to a cutting machine by a conveyance means, and the fish tail 70 and divided end part 80 are cut simultaneously. First of all, the first bar 7 and the second bar 8 are conveyed in parallel simultaneously by a conveyance means 2, and the end faces of the bars 7 and 8 are trued up. Then, with the second bar 8 left held at its position, only the bar 7 is advanced to align the cutting position of the bar 7 with that of the bar 8. After that, the bars 7 and 8 are cut simultaneously at their respective cutting position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for mixing rods having different end cutting lengths and simultaneously performing end cutting.

[0002]

2. Description of the Related Art For example, when manufacturing a steel bar, the following steps are usually taken. That is, as shown in FIG. 14, first, an intermediate material obtained by rolling a steel ingot or a steel piece has an intermediate material 7, 8 having a length such that it can be inserted into the cooling floor 65.
Then, it is divided and cut by the dividing shear 61. Next, the obtained plurality of intermediate materials 7 and 8 are inserted into the cooling bed 65 and simultaneously cooled. Next, the cooled intermediate materials 7 and 8 are unloaded from the cooling floor 65, transported by the transportation means 2 to the cutting machine 5, and cut into product lengths.

The cutting to the product length is performed by collectively cooling a plurality of pieces simultaneously cooled in the cooling floor 65 in order to improve the work efficiency. That is, the plurality of intermediate materials 7 and 8 carried out from the cooling floor 65 are arranged in parallel on the transport means 2,
It is conveyed in parallel to the cutting machine 5 arranged in front of the axial direction and cut at the same time.

Here, the intermediate members 7 and 8 are as shown in FIGS.
As shown in (1), the leading end and the trailing end during rolling have defective portions usually called fish tails 70. on the other hand,
The intermediate member has a divided end portion 80 which is an end portion cut by the divided shear 61. Therefore, focusing on one end side (the side facing the cutting machine) of the intermediate material, one having the fish tail 70 (hereinafter, referred to as the first rod 7) and one having the split end portion 80 (hereinafter, referred to as the first rod 7). 2 bar material 8) will be mixed.

The fish tail 70 on the first rod 7
The divided end portions 80 of the second bar 8 are defective end portions that do not become products. Therefore, these defective ends are first cut and removed at the stage of product cutting. Also in this case, the first rod 7 and the second rod 8 are cut at the same time.

[0006]

However, the above-described conventional method and apparatus for cutting an end portion of a bar have the following problems. That is, as shown in FIGS. 15 and 16, the fish tail 70 of the first rod 7 and the divided end portion 80 of the second rod 8 are both defective, but their defective lengths are different. Specifically, the fish tail 70 is
The length to be removed is longer than the divided end portion 80, and the optimum cutting positions S7 and S8 (FIGS. 15 and 16) are different.

Therefore, as shown in FIG. 17, the ends of the first rod 7 and the second rod 8 are uniformly aligned axially forward, and all are aligned with the cutting position S7 of the fish tail 70. If the bar material is cut, the non-defective part 809 is also removed in the second bar material 8 having the divided end portion 80, and the yield is greatly reduced. In addition, reference numeral C shown in FIG. 17 indicates a product 70 which is sequentially cut after the end cutting.
The cutting position of 1,801 is shown.

The following measures are taken to solve the above-mentioned yield reduction problem. That is, when the intermediate material is carried out from the cooling floor, as shown in FIGS. 18 and 21, the aligning device 66 (FIG. 18) is used to cut the end cutting position S7 of the first rod 7 and the second rod. Edge cutting position S of material 8
8 (Fig. 20) and then cut them together with the cutting machine 5
There is a method of carrying in parallel to. However, in this method, as shown in FIGS. 19 and 22, the cutting position S is
The state in which 7 and S8 are aligned (FIG. 18) cannot be maintained up to the cutting machine 5, and the cutting position of each bar is displaced during the conveying process (FIGS. 19 and 22).

Therefore, this measure cannot solve the above problem. Therefore, it is abandoned to align the cutting positions S7 and S8 at the time of cutting the end portion, and as shown in FIGS. 20 and 23, after the conveyance, immediately before the cutting machine 5, all the bar members 7 and 8 are applied to the stopper 3. At present, the tip positions are aligned by contacting each other, and then, as shown in FIG. 24, the ends of all the rods 7 and 8 are cut by the length of the fish tail 70. In other words, the above-mentioned yield reduction problem remains unsolved.

Further, the reason why the cutting positions S7 and S8 (FIG. 18) aligned when being carried out from the cooling floor 65 are displaced during the transportation (FIG. 19) is usually that the transportation distance is relatively long and the transportation means. 2 is a grooved roller 20 (see FIGS. 25 and 2).
It is considered that there is a use of the roller table configured from 6). That is, as shown in FIGS. 25 and 26, the grooved roller 20 can restrain the rods 7 and 8 in the width direction to prevent the positional deviation during the conveyance, and the rods 7 and 8 can be prevented.
Suitable for systems that track the position of the.

However, the grooved roller 20 has the following problems. That is, as shown in FIG. 25, when processing the rods 7 and 8 having a diameter smaller than the pitch of the grooves 21, all the grooves 21 can be used, and these grooves 21 wear almost uniformly. On the other hand, as shown in FIG. 26, when processing the rods 7 and 8 having a diameter larger than the pitch of the groove 21, the groove 2 used to equalize the cutting load applied to the cutting machine.
11 and the unused groove 212 are generated.

This causes a difference in the degree of wear between the frequently used groove 211 and the less frequently used groove 212. Therefore, one rotation of the grooved roller 20 causes a slight variation in the distance traveled by the rods 7, 8. Furthermore, as mentioned above, the transport distance is relatively long. Therefore, it is considered that this variation is amplified and the variation of the cutting positions S7 and S8 becomes very large when the cutting machine 5 arrives.

Here, it is conceivable to repair or improve the wear difference of the grooved roller 20 or replace it with another conveying means. However, each of these measures requires enormous cost, so it cannot be said to be a good measure when weighed against the effects obtained.

The present invention has been made in view of the above conventional problems, and in the state where two types of bar materials having different end cutting positions are mixed, each bar material can be simultaneously cut at each cutting position. The present invention seeks to provide a method and apparatus.

[0015]

According to a first aspect of the present invention, a first rod member having a fish tail and a second rod member having a split end portion generated at the time of cutting by a split shear are conveyed in parallel in a mixed state. When the fishtail of the first rod and the divided end portion of the second rod are cut at the same time by conveying the first rod and the second rod by means of means, the first rod and the second rod are conveyed. By means of simultaneously carrying them in parallel at the same time, aligning the tip of the fish tail of the first rod with the tip of the divided end of the second rod, and then aligning the second rod at that position. While holding it, only the first rod is moved forward to adjust the cutting position so that the cutting position on the first rod and the cutting position on the second rod coincide with each other, and then the first rod is moved by the cutting machine. Material and second Wood and is at the same time the simultaneous cutting method of the bar end, characterized in that the cutting in the above cutting position.

What is most noticeable in the present invention is that the end faces are aligned with the parallel conveyance, the cutting position is adjusted, and then the cutting is performed. Then, the cutting position adjustment is performed by advancing only the first rod while keeping the second rod at that position.

Next, the operation of the present invention will be described. In the simultaneous cutting method of the end portions of the bar material of the present invention, first, the bar members are conveyed in parallel by the conveying means and the end faces are aligned. Therefore, even if the rods are displaced in the front-rear direction during the parallel conveyance, the tips of all the rods can be aligned by the end face alignment, and the influence of the displacement during the conveyance can be eliminated.

Aligning the tips of all the rods leads to matching the cutting positions of the first rods and the cutting positions of the second rods. That is,
The cut length of the fish tail of each first rod or the cut length of the divided end of each second rod is constant.

Therefore, by aligning the tips of all the rods, when there are a plurality of first rods, the cutting positions of the first rods are aligned in a horizontal line and the cutting positions of the second rods are aligned. Are also lined up horizontally. Therefore, the steps after the cutting position adjustment described later can be divided into a first rod group and a second rod group, and each group can be handled as one group.

Next, in the cutting position adjustment, only the first rod is moved forward while the second rod is held at that position. That is, as described above, the cutting positions of the first bars and the second bars are the same. for that reason,
While holding the second bar, advance only the first bar,
By matching the three cutting positions, the cutting positions of all bars can be easily aligned.

Therefore, the subsequent cutting by the cutting machine can be carried out simultaneously at the optimum cutting positions of the respective bar members. Therefore, unlike the conventional case, it is not necessary to cut and remove the non-defective part together with the end cutting of the second rod. In addition, considering the length of the non-defective part that has been removed in the past, the division length by the above-mentioned division shear after rolling each bar material is corrected in advance to the optimum length,
Product yield can be increased.

Therefore, according to the present invention, it is possible to reliably eliminate the conventional yield loss loss. Incidentally, the cutting by the cutting machine can be performed at the position after the cutting position is adjusted according to the arrangement state of the cutting machine, or after the cutting position is adjusted, the shift of the cutting position is influenced by the conveying means. It is also possible to advance after advancing a certain distance in parallel.

Next, as in the second aspect of the present invention, it is preferable that the end faces are aligned by bringing the tips of the rods into contact with the stoppers. As a result, the end faces can be reliably aligned with a device having a simple structure. Further, when the conventional device is provided with a stopper, it is possible to reduce the facility cost by diverting the stopper.

Further, as in the invention of claim 3, the cutting position adjustment can be performed by sandwiching and fixing only the second rod member and then advancing only the first rod member by the conveying means. preferable. As a result, it is not necessary to separately provide a new transportation means, and the equipment cost can be reduced.

Further, as in the fourth aspect of the present invention, it is preferable that the sandwiching and fixing be performed in a state where at least the tip portion of the second rod is lifted and separated from the conveying means. As a result, it is possible to reduce the holding force required for the above-mentioned clamping and fixing. That is, it is possible to pinch and fix the bar member with the advancing force of the bar member being reduced. Therefore, the equipment specifications required for sandwiching and fixing can be made relatively compact.

Further, as in the fifth aspect of the invention, the cutting position adjustment can be performed by advancing only the first rod member by a pinch roll provided separately from the conveying means (see FIG. 11). ). In this case, the accuracy of cutting position adjustment can be further improved.

Further, as in the invention of claim 6, in the cutting position adjustment, the entire second rod is lifted and separated from the conveying means, and then only the first rod is advanced by the conveying means. It is also possible (see FIG. 13). In this case, the second bar can be held without the above-mentioned clamping and fixing.

Further, as in the invention of claim 7, the stopper is individually provided for each bar, and when the cutting position is adjusted, the stopper of the first bar is opened,
Then, only the first rod can be advanced by the above-mentioned conveying means (see FIG. 12). In this case, the end face alignment and the cutting position adjustment can be performed by the same stopper, and the equipment configuration can be simplified.

Next, as an apparatus for carrying out the above method,
The following devices are available. That is, as in the invention of claim 8, when the first rod having the fish tail and the second rod having the divided end portion generated at the time of cutting by the dividing shear are mixed in parallel, they are conveyed in parallel. Transport means,
A stopper for bringing the tips of all the conveyed rods into contact with each other for aligning the end faces thereof, and holding the second rod at that position after aligning the end faces, and moving the first rod forward. ，
The cutting position adjusting means for matching the cutting positions of the first rod and the second rod, the fish tail of the first rod and the divided end of the second rod are cut positions of each rod. In the above, there is a cutting machine that cuts simultaneously, and there is a simultaneous cutting device for bar end portions.

What is most noticeable in the apparatus of the present invention is that it has the stopper and the cutting position adjusting means. According to the present invention, it is possible to adopt a means of aligning the tip positions of the rods which are scattered during conveyance by the stopper and then aligning the cutting positions of the rods by the cutting position adjusting means. It can be easily realized.

Next, as in the invention of claim 9, the cutting position adjusting means includes a lifter for raising the tip end side of the second rod, and a clamp device for sandwiching and fixing the rod together with the lifter. It is preferable to have This gives
It is possible to easily advance only the first rod member by operating the conveying means in a state where the tip end portion of the second rod member is lifted and clamped and fixed.

According to a tenth aspect of the present invention, the conveying means is a roller table in which a plurality of grooved rollers provided with a plurality of roller grooves for individually mounting the rods are arranged in parallel. Preferably, this allows
It is possible to easily track the position of each bar.

[0033]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 A method and apparatus for simultaneously cutting an end portion of a bar according to an embodiment of the present invention will be described with reference to FIGS. First,
As shown in FIG. 1 and FIG. 14 described above, the simultaneous cutting device 1 for the bar end portion of the present example includes the first bar material 7 having the fish tail 70 and the divided end portion 80 generated at the time of cutting by the dividing shear 61. This is a device that conveys these in parallel and cuts them by the cutting machine 5 in a state where the second rods 8 that they have are mixed in parallel.

As shown in FIG. 1, the construction is such that the conveying means 2 conveys the first rod 7 and the second rod 8 in a mixed state in parallel, and all the rods 7 and 8 that have been conveyed. Tip 7
Cutting position adjusting means for aligning the cutting positions S7, S8 (Fig. 10) of the rods 7, 8 with the stopper 3 for bringing the 1, 1 (Figs. 15 and 16) into contact with each other to align the end faces thereof. Four
And a cutting machine 5 for simultaneously cutting the cutting positions S7 and S8. Hereinafter, this will be described in detail.

The conveying means 2 is constituted by the means shown in FIG.
As shown in FIG. 26, a grooved roller 2 provided with a plurality of roller grooves 21 for individually mounting the rods 7 and 8 respectively.
It is a roller table in which a plurality of 0s are arranged side by side. Each roller groove 21 is managed as an individual position. That is, as to whether the bar material placed in each roller groove 21 is the first bar material 7 or the second bar material 8 or nothing is mounted, the tracking system is constructed separately. Is always grasped by.

As shown in FIG. 1, the stopper 3 is arranged in front of the cutting machine 5 and is arranged so that it can be moved up and down so that it can be retracted from the pass line through which the rods 7 and 8 pass. . That is, as shown in FIG. 2, when the end faces are aligned, the bar lines 7 and 8 are lifted to a position where they block the pass line, and in other cases, the bar members 7 and 8 are retracted below the pass line.
Is configured to be able to pass.

As shown in FIGS. 1, 3 to 5, and 8, the cutting position adjusting means 4 includes a lifter 41 for raising the tip side of the second rod member 8, and the lifter 41 and the second rod member 8 together. And a clamp device 42 for sandwiching and fixing. The lifter 41 has a stopper 3 as shown in FIGS.
There are two rows in front of. Also, the lifter 41 is
As shown in FIGS. 3 and 8, the grooved roller 20 is divided and provided at positions corresponding to the roller grooves 21.

Further, as shown in FIG. 9, the distal end portion 411 of each lifter 41 arranged in a divided manner is notched in a triangular shape in order to surely move the second rod 8 up and down. Further, each lifter 41 is configured so as to be able to move up and down independently, and is lifted up and down individually according to a command from a control unit having the above tracking system.

On the other hand, the clamp device 42 has the structure shown in FIGS.
As shown in FIG. 5, it is provided only above the lifter 41 in the row near the cutting machine 5. In addition, the clamp device 42
As shown in FIG.
It has an elevating bracket 422 vertically provided via a book tilt prevention guide 421. Also, the lifting bracket 422
Is connected to an elevating / lowering drive unit 423 disposed in the housing, and is arranged so that it can be moved up and down.

Further, as shown in FIG. 8, a plurality of clamp attachments 423 corresponding to the lifters 41 are arranged on the lifting bracket 422 via springs 424. Then, by lowering the lifting bracket 422, the clamp attachment 423 corresponding to the second rod 8 lifted by the lifter 41.
Is abutted against the second rod 8 and sandwiches it. This clamping force is exerted by the lowering of the clamp attachment 423 by the elevating / lowering drive unit 423, and in order to further uniformly clamp the difference in height of each bar, the assisting force of each spring 424 is applied. There is.

Next, the cutting machine 5 is arranged in front of the stopper 3 as shown in FIG. Also, FIGS.
As shown in FIG. 5, the blade forming the cutting machine 5 is exclusively for cutting a round bar, and includes a pair of upper and lower blades 51 and 52 having a plurality of semicircular blade surfaces. The blades 51 and 52 can obtain a good cut surface when the round bar material is cut.

A cooling floor is provided on the upstream side of the transfer means 2 as shown in FIG. That is, the delivery side of the cooling floor and the cutting machine 5 are connected by the conveying means including the roller table.

Next, a method of simultaneously cutting the end portions of the bar material by using the apparatus 1 of this example and its function will be described. First,
The plurality of rods 7, 8 cooled in the cooling floor, that is, the first rod 7 having the fish tail 70 and the second rod 8 having the split end portion 80 generated at the time of cutting by the split shear, In the state where they are mixed in parallel, these are conveyed toward the cutting machine 5 by the conveying means 2.

Then, as shown in FIG. 2, the conveying means 2 brings the respective tips of the first rod 7 and the second rod 8 into contact with the stopper 3 to align the tip positions of all the rods 7, 8. Align the end faces. Then, as shown in FIGS.
Only the first rod 7 is moved forward while the rod 8 is held at that position.

That is, as shown in FIGS. 3, 4, and 8, first, the lifter 41 on which the second rod 8 is positioned is raised, and the clamp device 42 is lowered. As a result, the second rod 8 is clamped and fixed from above and below with the tip side thereof being lifted.

Next, as shown in FIG. 5, the cutting length of the fish tail 70 and the divided end portion 8 are moved by the conveying means 2.
The first bar 7 is moved forward by the difference in the cutting length of 0. At this time, since the second rod 8 is clamped and fixed by the lifter 41 and the clamp device 42, the second rod 8 remains held at the position where the end faces are aligned.

Next, the clamp device 42 is opened and the lifter 41 is lowered to return the tip side of the second rod 8 to the original pass line. As a result, as shown in FIG. 10, the cutting position S7 on the first rod 7 and the cutting position S8 on the second rod 8 can be matched, and the cutting position adjustment is completed.

Then, as shown in FIG. 6, all the bar members 7 and 8 whose cutting positions have been adjusted are simultaneously advanced by the conveying means 2 to position the cutting positions S7 and S8 directly below the cutting machine 5. Then, the cutting machine 5 simultaneously cuts the first rod 7 and the second rod 8 at the cutting positions S7 and S8.

As a result, each of the rods 7 and 8 can have the optimum end cutting length, and can prevent the removal of extra good parts. Therefore, the yield can be surely improved by setting the division length by the division shear to the optimum length in advance.

Further, in the present example, as described above, the same conveying means as the conventional one can be used. for that reason,
Simultaneous cutting at the optimum position of the bar end can be easily realized by investing a relatively low equipment cost.

Embodiment 2 In this embodiment, as shown in FIG. 11, instead of the cutting position adjusting means 4 consisting of the lifter 41 and the clamp device 42 in the embodiment 1, the upper and lower parts are provided separately from the carrying means 2. A pair of pinch rolls 45 was provided.

When only the first rod 7 is moved forward, only the first rod 7 is pinched by the pinch roll 45 and driven to drive the rod. Others are the same as those in the first embodiment.

In this case, 1 for each pinch roll
The amount of forward movement for each book can be finely adjusted, and the cutting position adjustment can be further improved. Furthermore, even when three or more types of bar materials with different cutting positions are mixed,
It is also possible to achieve optimum cutting position adjustment individually. In addition, the same effects as those of the first embodiment can be obtained.

Embodiment 3 In this embodiment, as shown in FIG. 12, instead of providing the cutting position adjusting means 4 consisting of the lifter 41 and the clamp device 42 in Embodiment 1, the stopper 35 is replaced by a bar member. They are individually provided at the positions corresponding to 7 and 8.

When advancing only the first rod 7, the stopper 35 at the portion of the first rod 7 is opened,
Then, only the first bar was moved forward by the transport means 2. Others are the same as those in the first embodiment.

In this case, the end face alignment and the cutting position adjustment can be performed by the same stopper, and the equipment structure can be simplified. In addition, the same effects as those of the first embodiment can be obtained.

Embodiment 4 In this embodiment, as shown in FIG. 13, instead of providing the cutting position adjusting means 4 consisting of the lifter 41 and the clamp device 42 in Embodiment 1, the entire second rod 8 is provided. A large number of lifters 47 for lifting and separating from the conveying means 2 are provided between the grooved rollers 20 in the conveying means 2.

When advancing only the first bar 7, the lifter 47 of the second bar 8 is raised to separate only the second bar 8 from the conveying means 2 over the entire length, and then Only the first rod 7 is configured to be moved forward by the conveying means 2. Others are the same as those in the first embodiment.

In this case, the second bar can be held without the above-mentioned clamping and fixing, and it is effective when the bar 7, 8 to be processed is short. However, when the bar materials 7 and 8 to be processed are long ones such as several tens of meters, the required number of the lifters 47 becomes very large, and the equipment cost becomes higher than that of the first embodiment. It also has the disadvantage. Other than that, the same effects as those of the first embodiment can be obtained.

[0060]

Therefore, according to the present invention, it is possible to provide a method and an apparatus capable of simultaneously cutting each bar at each cutting position in a state where two kinds of bar having different end cutting positions are mixed. You can

[Brief description of drawings]

FIG. 1 is an explanatory view showing an arrangement of a simultaneous cutting device for bar end portions according to a first embodiment.

FIG. 2 is an explanatory diagram showing a state of end face alignment in the first embodiment.

FIG. 3 is an explanatory view showing a state in which only the second rod is raised at the time of adjusting the cutting position in the first embodiment.

FIG. 4 is an explanatory view showing a state in which the second bar is clamped and fixed at the time of adjusting the cutting position in the first embodiment.

FIG. 5 is an explanatory view showing a state in which only the first rod is advanced when the cutting position is adjusted in the first embodiment.

FIG. 6 is an explanatory diagram showing a state in which the cutting position of each bar is arranged immediately below the cutting machine after the cutting position is adjusted in the first embodiment.

FIG. 7 is an explanatory view showing a state in which the ends of the rods are cut at the same time in the first embodiment.

FIG. 8 is a front view of the clamp device according to the first embodiment.

FIG. 9 is an explanatory view showing the tip shape of the lifter according to the first embodiment.

FIG. 10 is an explanatory view showing the simultaneous cutting positions of each bar in the first embodiment.

FIG. 11 is an explanatory diagram showing a simultaneous cutting device for bar end portions according to the second embodiment.

FIG. 12 is an explanatory diagram showing a simultaneous cutting device for bar end portions according to a third embodiment.

FIG. 13 is an explanatory diagram showing a simultaneous cutting device for bar end portions according to a fourth embodiment.

FIG. 14 is an explanatory view showing an outline of a manufacturing process of a bar material of a conventional example.

FIG. 15 is an explanatory view showing a fish tail of a first rod member in a conventional example.

FIG. 16 is an explanatory view showing a divided end portion of a second rod member in a conventional example.

FIG. 17 is an explanatory view showing a simultaneous cutting position of each bar in the conventional example.

FIG. 18 is an explanatory view showing the end face position of each bar on the cooling floor outlet side in the conventional example.

FIG. 19 is an explanatory view showing the end face position of each bar after being conveyed in the conventional example.

FIG. 20 is an explanatory view showing an end face position of each bar at the time of simultaneous cutting in a conventional example.

FIG. 21 is an explanatory view showing an aligning state on the cooling floor outlet side in the conventional example.

FIG. 22 is an explanatory view showing an end face position of each bar after being conveyed in a conventional example.

FIG. 23 is an explanatory diagram showing a state of end face alignment in a conventional example.

FIG. 24 is an explanatory view showing a state in which the ends of the rods are simultaneously cut in the conventional example.

FIG. 25 is an explanatory view showing a state in which all grooves of a grooved roller are used in a conventional example.

FIG. 26 is an explanatory view showing a state in which some grooves of a grooved roller are used in a conventional example.

[Explanation of symbols]

 1. . . Simultaneous cutting device for bar ends, 1. . . Transportation means, 20. . . Grooved roller, 21. . . Groove, 3,35. . . Stopper, 4. . . Cutting position adjusting means, 41, 47. . . Lifter, 42. . . Clamping device, 5. . . Cutting machine, 7. . . First bar, 70. . . Fish tail, 8. . . Second bar, 80. . . Split end,

Claims (10)

[Claims] 1. A first rod member having a fish tail,
In a state where the second bar member having the divided end portion generated at the time of cutting by the dividing shear is mixed in parallel, these are conveyed to the cutting machine by the conveying means and the fish tail of the first bar member and the second bar member are conveyed. When simultaneously cutting the divided end portions of the first rod member and the second rod member, the first rod member and the second rod member are simultaneously conveyed in parallel by the conveying means, and
End face alignment is performed to align the tip of the fish tail of the bar and the tip of the divided end of the second bar, and then,
While holding the second bar at that position, only the first bar is advanced to adjust the cutting position of the first bar and the cutting position of the second bar, and then, A method for simultaneously cutting an end portion of a bar, wherein the first bar and the second bar are simultaneously cut by the cutting machine at each of the cutting positions. 2. The simultaneous cutting method for bar end portions according to claim 1, wherein the end faces are aligned by bringing the tips of the bar members into contact with stoppers. 3. The cutting position adjustment according to claim 1, wherein the cutting position adjustment is performed by sandwiching and fixing only the second rod member and then advancing only the first rod member by the conveying means. Simultaneous cutting method for the ends of bar materials. 4. The simultaneous cutting of rod end portions according to claim 3, wherein the clamping and fixing are performed in a state where at least a tip portion of the second rod member is lifted and separated from the conveying means. Method. 5. The bar member end portion according to claim 1, wherein the cutting position adjustment is performed by advancing only the first bar member by a pinch roll provided separately from the conveying means. Simultaneous disconnection method. 6. The cutting position adjustment according to claim 1 or 2, wherein the cutting position is adjusted by lifting the entire second rod member and separating it from the conveying means, and then advancing only the first rod member by the conveying means. A characteristic method for simultaneous cutting of bar ends. 7. The stopper according to claim 2, wherein the stopper is provided individually for each bar, and when adjusting the cutting position, the stopper of the first bar is opened and then the first bar is opened.
A method for simultaneously cutting end portions of a bar, characterized in that only the bar is moved forward by the conveying means. 8. A first rod member having a fish tail,
In a state where the second bar material having the divided end portions generated at the time of cutting by the division shear is mixed in parallel, the conveying means for conveying these in parallel and the tip end of all the conveyed bar materials are brought into contact with each other. A stopper for aligning and holding the second bar at that position after the end face alignment,
The rod is moved forward so that the cutting position adjusting means for aligning the cutting positions of the first rod and the second rod, the fish tail of the first rod and the divided end portion of the second rod. A simultaneous cutting device for bar end portions, comprising a cutting machine for simultaneously cutting each bar at each cutting position. 9. The cutting position adjusting means according to claim 8, wherein the cutting position adjusting means includes a lifter for raising the tip end side of the second rod member, and a clamp device for sandwiching and fixing the rod member together with the lifter. Simultaneous cutting device for bar end. 10. The roller table according to claim 8 or 9, wherein the carrying means is provided with a plurality of grooved rollers provided with a plurality of roller grooves for respectively mounting the rods individually. A simultaneous cutting device for bar end portions, which is characterized in that