JPS61108408A - Joining device of hot rolling stock - Google Patents

Abstract

PURPOSE:To improve rolling efficiency by installing a press, used for pressure welding rolling stocks together, as well as disposing a tool rest, equipped with a wedge and cutting tools and traversed in the width direction of rolling stock. CONSTITUTION:A press 9 is constituted of an upper press bed 91, a hydraulic cylinder 93 connected to the bed 91 and a lower press bed 92. A tool rest 14 made of tool steel, is connected to the rear end of a wedge and is provided with plural cutting tools on its outer periphery. Further, the rest 14 is mounted on a traveling dolly on a rail, set in the vicinity of lower press 92, and is made freely movable in the direction perpendicular to the advancing direction of a rolling stock 2. The rear end of a preceding rolling stock is raised with the aid of the wedge of tool rest 14 by traveling the dolly, to work the pressure welding parts of rolling stocks 2, 3. The working surfaces are pressure welded to each other in the nonoxidizing atmosphere by means of the press 9 while retreating the rest 14. Thus, the rolling efficiency is improved because the rolling stocks are well joined together in a short time.

Description

[Detailed description of the invention] 11yo (7) 11th month public! The present invention relates to a joining apparatus for hot rolled materials.

More specifically, the present invention relates to a highly efficient joining device for hot-rolled materials that simultaneously cuts and press-bonds the joining surfaces of the rear end of the preceding rolled material and the front end of the trailing rolled material.

Conventional technology In recent years, when producing plate-shaped products by hot rolling steel billets,
One of the rolling methods that has been developed and implemented is the continuous hot rolling method.

This can be done, for example, by butting or overlapping the rear end of the preceding rolled material and the leading end of the succeeding rolled material on the man side or exit side of the rough rolling mill, and This is a rolling method.

However, there is a limit to the rolling speed in the butt rolling method, and in the overlapping rolling method, there is still a limit to the rolling speed due to sudden load fluctuations on the rolling mill when biting occurs due to the step at the overlapped part. It cannot be said that it is practical because of the reception etc. As a recent trend, methods that have been increasingly researched and developed include joining the overlapping parts using an appropriate joining means, or processing the joining surfaces of the overlapping parts into a complementary shape using an appropriate processing means, and For example, the bonded surfaces are overlapped in a complementary manner, and the overlapped portions are bonded by pressure using an appropriate bonding means.

These conventional methods will be described below.

First, Japanese Patent Publication No. 54-39194 discloses that the rear end of the preceding rolled material and the leading end of the subsequent rolled material are overlapped between a rough rolling mill and a finishing rolling mill, and both sides of this overlapped part are temporarily The method for attaching and welding is described.

Furthermore, JP-A-51-130655 discloses that between the final stand of the rough rolling mill row and the tandem finishing mill,
Overlap the rear end of the leading steel piece and the tip of the trailing steel piece,
The joint is cut diagonally across the width at a predetermined angle to the axis of the billet, and after removing the cut pieces, the trailing billet is accelerated and pressed against the leading billet, and the joint is rolled and joined. It describes how to do this.

Furthermore, JP-A-51-59748 discloses that when continuously hot rolling a steel billet, the axis of the steel billet is rolled in the width direction at the front and rear ends of the billet in the longitudinal direction. After descaling or descaling and heating the sheared surface so that the angle intersecting with the preceding specimen is between 20° and 85°, the sheared surface of the trailing slab is A method is described in which both pieces of steel are pressed together while being pressed.

However, in the method described in Japanese Patent Publication No. 54-39194 mentioned above, the leading end and trailing end of the rolled material are overlapped and joined, and the side faces are joined by tack welding, so the joining area is small. Small size and weak bonding strength.

Furthermore, since the joint part has a step difference compared to the parts other than the joint part, this causes a sudden load change in the rolling mill, and in extreme cases, there is a risk of breakage within the mill.

Furthermore, if the stepped portion of the overlapping portion is fed as it is to a finish rolling mill, the width will increase during finish rolling, which will impede the smoothness of the finish rolling operation.

Next, the method described in Japanese Patent Application Laid-Open No. 51-130655 creates almost no step difference between the overlapping part and the part other than the overlapped part, and the joining area of the overlapping part can be increased, but Since the means for shearing the material at a certain angle is oxygen cutting, etc., the processed surface after processing is not smooth, and it is difficult to obtain a more precise processed shape, which is a factor that reduces the bonding strength after pressure bonding.

Furthermore, since a considerable amount of work time is spent on heating and fusing, the formation of scale on the machined surface is unavoidable, reducing the joint strength after crimping, and if this scale cannot be completely crimped, internal defects such as inclusion defects may occur. of defect: cause;

Furthermore, since the shearing means is oxygen cutting or the like and the shearing angle is limited, a considerable amount of working time is spent on heating and cutting, making it difficult to achieve high efficiency.

Furthermore, in the method described in JP-A-51-59748, the means for shearing the joint surfaces of the overlapped portions is an oxygen jet or other gas, and the shearing angle is limited, and the processed surface is cleaned and smoothed after shearing. Because of this, it is not possible to expect a significant increase in efficiency.

By the way, when continuous rolling is carried out by joining the rear end of the preceding rolled material and the leading end of the trailing rolled material, there are important matters to be considered in order to maximize the benefits of continuous rolling.
A step due to a difference in thickness between the joint part after joining (two sheets are stacked one on top of the other, or the diagonally cut surfaces are pressed against each other. Hereinafter, these are referred to as joint parts) and the surfaces other than the joint part, There are bond strength and work time required for bonding.

In other words, the purpose of changing from the conventional intermittent rolling, in which steel materials are fed one by one to a rolling mill, to continuous rolling, is to improve rolling efficiency, improve material yield, reduce roll consumption, save energy, etc. It is.

First, when the step at the joint part bites into the rolled material, it rapidly increases the load on the rolling mill, forcing the rolling speed to be reduced.

Furthermore, if the joint is crimped with a press or the like before it is inserted into the finish rolling mill, this part will be wider than other parts, so in order to make the finish rolling process smoother, it is necessary to In addition, it is necessary to perform sighted IJ milling on the width portion, which causes a reduction in rolling efficiency.

If the joint strength is weak, it will be necessary to reduce the rolling speed to avoid breakage. If it breaks, it will cause inconveniences such as cutting out the damaged part, reheating the rolled material, energy loss, and equipment damage, and will also cause safety problems.

Factors that affect joint strength include the method of combining rolled materials (butt, overlapping, etc.) and joining method (welding, crimping, etc.), but another particularly important factor is the amount of scale generated on the joint surface. There is.

It is generally known that the scale generation mechanism of steel materials is that most of the scale is generated in a short period of time in a high temperature range of 700° C. or higher. If the bonding time is long, the rolling efficiency decreases, and the formation of the scale cannot be suppressed, resulting in a decrease in bonding strength. For this reason, a method of cleaning the bonding surface using a cleaning means is often used.

Therefore, as mentioned above, in order to achieve the purpose of converting conventional intermittent rolling to continuous rolling to the maximum extent possible, the conventional technology has been used to connect the leading rolled material and the trailing rolled material. It has fundamental defects in terms of bonding strength, time required for bonding, etc., and problems in equipment technology cannot be resolved.

Problems to be Solved by the Invention Accordingly, an object of the present invention is to solve the drawbacks of the prior art and to solve the problems of the prior art by overlapping and joining the rear end of the preceding rolled material and the leading end of the succeeding rolled material for continuous rolling. The joining surfaces of the leading and trailing ends of the overlapping part can be simultaneously cut efficiently and in a short time, and the joining surfaces of the overlapping part can be immediately overlapped and crimped to join after cutting, resulting in more efficient joining. It is an object of the present invention to provide a hot-rolled material joining device with good joining strength.

Means for Solving the Problems In order to eliminate the drawbacks of the above-mentioned conventional technology and achieve the purpose of continuous rolling to the maximum extent possible, the present inventors have conducted repeated experiments and research regarding problems in joining equipment technology. We have succeeded in developing the device of the present invention.

That is, according to the present invention, a press is provided on the entry side of a rough rolling mill or a finishing rolling mill of a continuous hot rolling line, and comprises an upper press table and a lower press table, and presses a hot rolled material; A wedge for lifting the rolled material,
A plurality of blades for cutting the rolled material are integrally connected to the wedge for lifting the rolled material and are provided on the outer peripheral portion thereof, and are capable of traveling in the width direction of the rolled material and lifting the rolled material with the wedge, and There is provided a hot rolled material joining apparatus characterized by including a tool rest configured to be able to rotate and cut the end of the hot rolled material to be joined.

Further, according to the present invention, there is provided a hot-rolled material joining apparatus, wherein the press has a flat lower surface on the upper press stand.

EXAMPLES Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a continuous hot rolling line showing one embodiment according to the present invention. In the figure, 1 is a winding machine, 2 is a trailing rolled material, 3 is a preceding rolling material, 4 is a roller table, 5 is a hot rolled material joining device according to the present invention, 6 is a spot welding machine,
7 is a looper, and 8 is a finishing mill.

That is, in the example shown in FIG. 1, the preceding rolled material 3 and the succeeding rolled material 2
The cutting process and pressure bonding are performed on the entry side of the finishing mill 8. In the figure, a winder 1 is used for rolling material extracted from a heating furnace (not shown), rolled by a rough rolling mill (not shown) consisting of a plurality of stands, and running on a roller table 4. 2 is configured to wind up and unwind.

FIG. 2(a) shows the upper press stand 91 and the upper press stand shielding plate 1.
01 is a plan view schematically showing a non-oxidizing gas blowing means and a fulcrum roller, and FIG. FIG.

A hot rolled material joining apparatus 5 according to the present invention shown in FIG. A fulcrum roller 12 installed on the finish rolling mill 8 side of the press 9;
and a wedge and a tool rest, the wedge 13 and the tool rest 1
It mainly consists of a traveling trolley on which a 4 is integrally mounted, but with reference to FIGS. 1 to 2 (a) and (b),
First, the press 9, shielding plate 10, non-oxidizing gas blowing means 11, and fulcrum roller 12 of the hot rolled material joining apparatus 5 according to the present invention will be explained in detail.

In the figure, the press 9 is mainly composed of an upper press stand 91 above, a hydraulic cylinder 93 connected thereto, and a lower press stand 92 below. A shielding plate 10 is provided around each side of the upper press table 91 and the lower press table 92, and a non-oxidizing gas blowing means 11 is attached to the shield plate 10. The upper press table 91 has a lower surface that is flat or curved. The reason for this will be explained later.

Furthermore, the upper press table 91 has a hydraulic cylinder 93 connected thereto.
It is configured to be able to move up and down. The lower press table 92 has a flat upper surface and has a fixing means (not shown).
It is installed and fixed on the ground.

The shielding plate 101 of the upper press table is made of steel plate or the like and forms a hollow box shape having a cross section larger than that of the upper press table 91, and the upper press table 91 is fitted in the center of the upper surface of the box shape. A partially cutout opening is formed in a shape similar to the cross section of the upper press table 91, and a plurality of mounting portions 10 are provided in the vicinity of the cutout.
2, and a plurality of nozzle holes 111 are provided in the non-cut portion of the upper surface, and the lower surface of the box shape is configured to be completely open. The upper press stand shielding plate 101 is configured as described above (the missing part is fitted into the upper press stand 9I from the lower surface of the upper press stand 101, and the above mounting part 102 is connected to the upper press stand 91 by the 103). It is attached so as to surround the side surface of the upper press stand 91. Thus, a gap S1 is defined between the side surface of the upper press table 91 and the side surface of the upper press table shielding plate 101.

The lower press stand shielding plate 104 is made of steel plate and is attached to the lower press stand 9.
A hollow box shape having a cross section larger than 2 is formed, the upper surface of the box shape is completely open, and the lower surface of the box shape has a center portion large enough to fit a lower press table 92, and a lower press table 92 is formed. A part of the upper part of 92 (non-defective part) is partially cut out and opened in a similar shape to the cross section, and a plurality of mounting parts 102 are provided near the cut-out part, and a nozzle hole 111 is provided in the non-cut part of the lower surface. There are several.

The lower press stand shielding plate 104 is constructed as described above, the above-mentioned missing part is fitted into the lower press stand 92 from the upper surface of the lower press stand 104, and the above-mentioned mounting part 102 is attached to the lower press stand 92 by the pole l-103. It is attached so as to surround the side surface of the lower press stand 92. Thus, a gap S1 is defined between the side surface of the lower press table 92 and the side surface of the lower press table shielding plate 104.

The non-oxidizing gas blowing means 11 is connected to the upper press stand shielding plate 101.
and a nozzle hole 111 provided in the lower press stand shielding plate 104.
A nozzle 112 is attached to the nozzle 112, and the nozzle 112 communicates with a non-oxidizing gas supply source 114 via a pipe 113 communicating with the nozzle 112.

Further, these pipes 113 are provided with on-off valves 115, and the on-off valves 115 are provided with opening/closing means (not shown) for opening and closing the on-off valves 115 by remote control.

The fulcrum roller 12 is provided in the vicinity of the press 9, on the finishing rolling machine side, in parallel with the roller table 4, and the under skin point roller 121 is disposed to form a part of the roller table 4.
and an epithelial point roller 122, which is disposed horizontally above and opposite the lower skin point roller 121 and is movable up and down by a driving means (not shown).

3(a) to 3(e) are detailed views of the traveling carriage 15 on which the wedge 13 and the tool rest 14 of the hot-rolled material joining apparatus 5 according to the present invention are mounted, and FIG. 3(a) shows the wedge FIG.
b) is a plan view of the traveling carriage 15 on which the wedge 13 and the turret 14 are mounted, and FIG. 3(C) is a plan view of FIG.
), Fig. 3(d) is a cross-sectional view of wedge 1 in the AA' direction.
3 and a plan view of the tool post 14 portion, and FIG. 3(e) is a detailed view of the cutter tool 141 portion.

Referring to FIGS. 3(a) to 3(e), the wedge 13, the turret 14, and the traveling carriage 15 of the hot rolled material joining apparatus 5 according to the present invention will be described in detail.

In FIG. 3(a), the running bogie 15 includes a steel plate 151 forming the exterior, wheels for making the running bogie 15 run in the width direction of the rolled material, driving means for driving the same, and a running bogie being driven. 15, and is laid on the ground from near the lower surface of the lower press table 92 in a direction perpendicular to the direction of movement of the rolled material, and has a braking stopper 161 at the tip. It is mounted on rails 16. The exterior of the traveling trolley 15 is formed to have a rectangular planar cross section, the lower surface is entirely open, and the four sides and the upper surface are formed by welding or the like with one steel plate fence.

A total of four wheels are disposed on which the traveling trolley 15 runs, one each on the front left and right sides of the lower surface of the traveling trolley 15 (referred to as front wheels 1521), and one each on the left and right rear lower surfaces (referred to as rear wheels 1522). The driving means for driving the wheels (front wheel 1521 rear wheel 1522) includes an axle 1531 and an axle 153.
The main structure consists of a bearing 1532 that supports the rear wheel 1, and a bearing box 1533 that houses the cough bearing 1532.
522 includes a rotating gear 1534 connected to and rotated by the axle 1531; a driving gear 1535 meshing with and rotating the rotating gear 1534; a driving shaft 1536 connected to and rotating the driving gear 1535; An electric motor 1537 is provided for connection and rotation.

The front wheel 1521 and the rear wheel 1522 are each connected by one axle 1531. The shaft 1531 is fixed to the side wall of the traveling truck 15 by welding, and has a protruding reinforcing plate 1.
Bearing box 1 fixed by welding and protruding from 538
Bearing 1532 with built-in bearing housed in 533
It is rotatably supported by. The bearing box 1533 has a two-part structure with upper and lower parts having a vertically symmetrical shape,
The lower side surface is fixed to a reinforcing plate 1538 by welding, and the upper part is attached to the lower part by a bolt 1539.

Furthermore, a rotating gear 1534 for driving the rear wheel 1522 is fitted into the axle 1531 of the rear wheel 1522.
A rotating gear 1534 for driving is meshed with a driving gear 1535. The drive gear 1535 is fitted with a drive shaft 1536, and the drive shaft 1536 is connected to an electric motor 1537. The electric motor 1537 has a rectangular shape constructed by a beam 172 that extends horizontally in the width direction of the traveling truck 15 from the upper surface of both ends of a wire 171 that is fixed and protruded by welding or the like to the rear inner side surface of the traveling truck 15. It is placed on a pedestal 173 made of a steel plate provided on the upper surface of the frame, fixed with bolts, etc., and connected to a drive power source (not shown).

The clamping means 154 is mainly composed of two brake plates 1541, a rotating shaft 1542, and an electric motor 1543, and is disposed inside the traveling carriage 15 near the lower side surface.

The two brake plates 1541 are arranged so as to sandwich one rail 16 (disposed on the left and right sides of one rail 16, each having screw holes in opposite directions, and a threaded portion provided on the rotating shaft 1542). The rotating shaft 1542 has a threaded portion at one end and is connected to an electric motor 1543 at the other end.The electric motor 1543 is fixed by welding to both sides of the inside of the traveling carriage 15 near the center and is provided protrudingly. On the upper surface of both ends of the rice cake 174,
It is placed on a frame 176 made of a steel plate provided on the top surface of a rectangular frame constructed of a rectangular frame 175 that is horizontally suspended across the width of the traveling trolley 15 and fixed by welding, and is fixed with bolts or the like. , and is connected to a drive power source (not shown).

A semi-conical wedge 1 is attached to the front of the top surface of the traveling truck 15.
3, a cylindrical tool rest 14 connected to the rear thereof and equipped with a plurality of blades on the outer periphery, a rotating shaft 18 connected to this, a bearing 19 that supports and rotates this, and a bearing box that supports this. 20, a rotating gear 21 connected to the rotating shaft 18, a driving gear 22 connected to this, a driving shaft 23 connected to this to rotate, and an electric motor 24 connected to this to rotate. It is on a shelf.

Here, this wedge 13 may have any shape as shown in (A) and (B) of FIG. 3(d), and the material must not damage the rolled material during actual use or have extremely poor durability. Good. Specifically, it is made of steel plate or the like. The main body of the tool post 14 connected to the rear end of the wedge 13 is made of tool steel or the like,
The plurality of blades 141 attached to the outer periphery of the tool rest are made of hot-work tool steel or the like that has good durability in hot conditions, and have a substantially triangular pyramid shape as shown in FIG. The tip that comes into contact with the tool rest is formed into a triangular shape with an acute angle, and is disposed at a position facing the outer periphery of the tool post 14.

The rotating shaft 18 connected to the rear surface of the tool rest 14 has a cylindrical shape with a large diameter at both ends, a cylindrical shape with a smaller diameter at the center than both ends, the center passes through the bearing 19, and the other end has a cylindrical shape with a smaller diameter than both ends. The drive gear 22 is connected to the drive gear 22 at the end. The bearing 19 has a built-in bearing in its outer peripheral portion and is housed in a bearing box 20. The bearing box 20 has a symmetrical two-part structure with an upper part and a lower part, with the overlapping part of the upper part overlapping the overlapping part of the lower part, and a plurality of ear parts 2 provided on the outer periphery.
01 is fastened with a bolt 202, and the bolt 202
By removing the upper part and the lower part, the upper part and the lower part can be freely attached and detached. The lower part of the bearing box 20 is fixed by welding to both side surfaces near the center of the carriage 15, and has a beam 178 that extends horizontally across the width of the carriage 15 on the upper surface of both ends of a protruding rod 177. It is placed on a pedestal 179 made of a steel plate provided on the upper surface of a rectangular frame constructed from the above, and the lower surface is fixed by welding or the like. The rotating gear 21 meshes with a driving gear 22, and the driving gear 22 is connected to a driving shaft 23.
The drive shaft 23 is connected to an electric motor 24. The electric motor 24 is attached by bolts 24 to an installation plate 241 which is fixed by welding to the steel plate 151 on the upper surface of the traveling trolley 15.
It is fixed and installed in step 2.

The above is the configuration of the hot rolling joining apparatus 5 according to the present invention. As shown in FIG. and is connected to a drive means (not shown) and a welding power source (not shown).

In this case, in another application example, a seam welder may be employed as a joining means in place of the spot welder 6.

Next, as shown in FIG.
A roller 7372 having approximately the same diameter and the same length as the roller table 4 is installed in parallel at a position facing directly above the roller table 4, and one roller 73 is installed horizontally in the width direction of the rolling mill above the middle of the two rollers 71 and 72. It is located in

As shown in FIG. 1, the finishing rolling mill 8 includes a pair of upper and lower work rolls arranged in multiple rows with a rolling material interposed between the pair of upper and lower back-up rolls.

The configuration of the continuous hot rolling line in one embodiment according to the present invention has been described above, and the operation will be explained next.

FIGS. 4(a) to 4(C) show that, in accordance with the implementation of the present invention, the wedge 13 is moved by running the carriage 15 over the rear end 31 of the preceding rolled material 3 that is stopped on the upper surface of the lower press table 92. The front of the rear end of the preceding rolled material 3 is pressed onto the lower supporting roller 121 by the upper fulcrum roller 122, and then the leading end 21 of the trailing rolled material 2 is stopped on the upper surface of the lower press table 92, and the preceding rolling material 3 is The lower surface of the trailing end portion 31 of the material and the leading end portion 21 of the trailing rolled material
FIG. 3 is a schematic diagram showing a state in which the upper surface of the holder is cut. That is, FIG. 4(a) is a schematic side view showing the state in which the rear end portion 31 of the previously rolled material stopped on the upper surface of the lower press table 92 is being lifted by the wedge 13 by the traveling cart 15. (b) shows that the lifting of the rear end portion 31 of the preceding rolled material in FIG.
1 is stopped on the upper surface of the lower press table 92, a side schematic diagram
FIG. 4(C) shows that the front of the rear end portion 31 of the previously rolled material lifted by the wedge 13 in FIG. 4(C) is pressed onto the lower fulcrum roller 121 by the upper fulcrum roller 122, and A schematic front view showing the state in which the lower surface of the end portion 21 and the upper surface of the leading end portion 31 of the trailing rolled material are being cut by rotating the tool rest 14, FIG. 5 is similar to FIGS. 4(a) to (C). The trailing end portion 31 of the preceding rolled material, which has been completely cut, and the leading end portion 21 of the trailing rolled material are abutted against each other on the upper surface of the lower press table 92, and the abutted portions are crimped and joined by the press 9 in a non-oxidizing atmosphere. FIG. 6 is a front view showing a state in which the cutting-processed leading rolled material rear end 31 and trailing rolled material leading end 21 are aligned and butted against each other to be crimped and joined.
) shows before crimping bonding, FIG. 6 et al.) shows after crimping bonding, FIG. FIG. 7(a) is a perspective view of a joint portion where spot welding is performed, and FIG. 7(b) is a perspective view of a joint portion where seam welding is performed.

The pre-rolled material 3 extracted from the heating furnace is roughly rolled in a rough rolling mill consisting of a plurality of stands, runs on a roller table 4, and passes through a press 9, a spot welder 6 and a looper 7 shown in FIG. A finishing rolling mill 8 consisting of multiple stands
It is then sent for finishing rolling.

By the way, when the rear end 31 of this previously rolled material 3 reaches the upper surface of the lower press stand 9 of the press 9 shown in FIG. Stops in place. In this case, the rear end portion 31 of the previously rolled material
However, even if the roots are stopped on the upper surface of the lower press table 92,
Due to the buffering effect of <7, finish rolling of the previously rolled material 3 can be continued.

On the other hand, the trailing rolled material 2 extracted from the heating furnace is roughly rolled by the rough rolling mill, runs on the roller table 4, and is once wound up by the winding machine 1 shown in FIG. Immediately before the trailing end portion 31 of the preceding rolled material approaches the press 9 shown in FIG. Run above and press 9
sent to.

When the rear end portion 31 of the preceding rolled material stops on the upper surface of the lower press stand 92, the traveling carriage 15 is caused to travel in the width direction of the rolled material.

As shown in FIGS. 3(a) and 3(b), the traveling vehicle 15 turns on a forward drive switch (not shown) to drive the electric motor 1537, thereby moving the traveling vehicle 15 forward.

Here, as shown in FIG. 4(a), the traveling carriage 15 travels in the width direction of the rolled material, and the leading end of the wedge 13 mounted on the traveling vehicle 15 moves upward from the rear end 31 of the preceding rolled material. lift.

Here, as shown in FIG. 4(b), the traveling carriage 15 is arranged such that the entire length of the wedge 13 passes through the entire width direction of the upper press stand 91 and the lower press stand 92, and the rear end portion 31 of the previously rolled material passes through the tool rest 14.
Stop when it is at the top. Therefore, the moving truck 15 is moved forward by turning on the drive switch (not shown) of the electric motor 1543 of the clamping means 154.
543 rotates, a rotating shaft 1542 connected thereto rotates, and two brake plates 15 are screwed together with the rotating shaft 1542.
41 moves in the side direction of the rail 16, tightens the rail 16, and stops the traveling bogie 15. When the traveling carriage 15 stops, it lowers the trailing rolling material tip 21 running on the roller table 4 as shown in FIG. 4(b).

It is stopped at a predetermined position on the upper surface of the rest table 92.

Next, as shown in FIG. 4(c), when the tool rest 14 is positioned between the rear end portion 31 of the preceding rolled material and the leading end portion 21 of the following rolled material, the upper fulcrum roller 122 is pushed down by the driving means and the preceding rolled material is moved. After pressing and clamping on the lower fulcrum roller 121,
The turret 14 is rotated to cut the lower surface of the rear end portion 31 of the preceding rolled material and the upper surface of the leading end portion 21 of the subsequent rolled material.

Here, the rotation diameter including the cutter 141 of the tool rest 14 rotating between the upper press stand 91 and the lower press stand 92, that is, between the rear end portion 31 of the preceding rolled material and the leading end portion 21 of the following rolled material, is:
In order to prevent damage to the upper press stand 91, the lower press stand 92, and the cutter 141, the lower surface of the upper press stand 91 and the lower press stand 92 are
The distance between the upper and lower surfaces is about 0.3+nm smaller than the distance between the top surfaces.

On the other hand, the fulcrum roller 12 fixes the rear end portion 31 of the preceding rolled material lifted by the wedge 13, facilitates the cutting process, and improves the alignment when butted against the leading end portion 21 of the subsequent rolled material after the cutting process. However, even when the fulcrum roller 12 is not used, in another application example of the present invention, the cutting process and the pressure bonding between the trailing end part 31 of the preceding rolled material and the leading end part 21 of the following rolling material after the cutting process are performed. It is possible.

When the tool rest 14 is rotated, the tip of the cutter 141 attached to the tool rest 14 comes into contact with the rolled material, and since the part to be cut is formed in a triangular shape with an acute angle, the rear end 31 of the preceding rolled material The lower surface and the upper surface of the trailing rolling material tip 21 are cut in an arc shape obliquely to the axis, and each cropped portion is removed.

Here, the rotation time of the tool rest 14 is set until the cropped portion is cut off, and at the time of cutting off, the rotation of the tool rest 14 is stopped and the traveling cart 15 is separated from the press 9.

In the case of this example, the thickness of the rolled material to be cut is usually 30 to 50 mm, and for example, the diameter of the tool rest is 550 mm.
mm, and the number of rotations of the tool rest is 60 rpm, the cutting time is within 1 second.

To stop the rotation of the tool rest 14, turn the drive switch of the electric motor 24 to 0. This is carried out by turning FF, and the traveling carriage 15 is detached from the press 9 by turning the reverse switch (not shown) of the electric motor 1537 to N. In this state, the rear end portion 31 of the traveling rolled material and the leading end portion 21 of the trailing rolled material are placed on the upper surface of the lower press table 92 with their respective cut surfaces butted against each other, as shown in FIG. If the respective cut surfaces do not completely abut, the roller table 4 is finely adjusted and abutted against each other in perfect alignment.

Next, as shown in FIG. 5, the on-off valve 115 of the non-oxidizing gas supply means 11, such as N2 gas, provided around the upper press table 91 and the lower press table 92 is opened, and the non-oxidizing gas G is supplied from the nozzle 112. While releasing the material, the hydraulic cylinder 93 connected to the upper press stand 91 is driven, and the upper press stand 91 is pushed down toward the upper surface of the abutting part between the rear end part 31 of the preceding rolled material and the leading end part 21 of the following rolled material, so that they butt. Crimp and join the parts.

Here, there is almost no gap between the upper press stand shielding plate 101 and the lower press stand shielding plate 101, which are provided so as to surround the upper press stand 91 and the lower press stand 92, and the side surfaces of the upper press stand 91 and the lower press stand 92. Since the lower surface of the upper press table shielding plate 101 and the upper surface of the lower press table shielding plate 104 are configured to be completely open, the non-oxidizing gas G
Almost no escaping occurs upward, and most of it is blown onto the upper and lower surfaces of the butting surfaces of the rolled materials, so that the cutting surfaces of the trailing end 31 of the leading rolled material and the leading end 21 of the trailing rolled material are Protected by a non-oxidizing atmosphere, scale generation can be completely suppressed.

Note that the thickness of the rolled material to which the hot rolled material joining apparatus 5 according to the present invention is applied is 30 to 50 mm, and therefore the cutting time is extremely short, usually within 1 second, and the joining part after cutting is extremely short. Crimp bonding is also carried out quickly, so there is almost no scale on the cut surface that would affect the bonding strength. Means 11 is not necessarily required. The butt portion before crimping and joining has a shape as shown in Fig. 6(a), but since the maximum length in the longitudinal direction of this gap S2 is about several mm in the case of ordinary hot-rolled materials, the bottom surface is With the curved upper press 91, complete pressure bonding can be achieved as shown in FIG. 6, etc., and the bonding strength after bonding is hardly affected.

Therefore, in another application example of the present invention, for example, when the thickness of the rolled material is relatively thin, the maximum length in the longitudinal direction of the gap S2 is also small, and therefore the upper press table 91 with a flat lower surface may be used.

When the pressure bonding is completed in FIG. 5, the non-oxidizing gas supply on-off valve 115 is closed and the release of the non-oxidizing gas G is stopped. Furthermore, the upper press table 91 has a hydraulic cylinder 9
By driving 3, it moves upward and stops.

Next, the rolled material that has been crimped and joined moves on the roller table 4 and stops when the joint comes between the upper and lower welding terminals 61 and 62 of the spot welder 6. Spot welding 6 is
In the above-described hot rolled material joining apparatus 5 according to the present invention, further bonding strength is to be imparted to the joined portion of the rolled materials that have been crimped and joined.This is carried out as follows.

That is, the upper and lower welding terminals 61. '62 is brought close to the upper and lower surfaces of the joint of the rolled material by the driving means (not shown), and the operating switch (not shown) connected to the welding power source (not shown) is connected to the ONL, welding terminal 61. .62 is scanned in the width direction.

Thus, as shown in FIG. 7(a), the abutting surfaces cut obliquely to the axis of the abutting portions are spot-melted and welded. In this case, in another application example of the present invention, spot welding is replaced by seam welding of the butt surfaces cut obliquely to the axis by a seam welding machine (not shown) as shown in FIG. 7(b). It's okay. The rolled material that has been spot welded travels on a roller table 4, is sent to a finishing mill 8 via a looper 7, and is finished rolled.

Incidentally, a preceding rolled material 3 and a subsequent rolled material 2 of another application example of the present invention
The cutting and pressure bonding can also be carried out on the entry side of the rough rolling mill.

Effects of the Invention As described in detail above, the present invention provides a method for bonding a preceding rolled material and a subsequent rolling material to perform hot continuous rolling, the lower surface of the trailing end of the preceding rolling material to be joined and the subsequent rolling material. The upper surface of the tip can be cut simultaneously and efficiently in a short time, and the cut surfaces of the preceding rolled material and the subsequent rolled material can be quickly aligned and butted against each other, and there is almost no scale on the cut surfaces. Since scale can be quickly bonded while protecting the machined surface with non-oxidizing gas and suppressing the generation of scale, there is no need to clean the machined surface at the stage before crimping and joining. This has the advantage of ensuring strong bonding strength at the joint after pressure bonding, keeping the temperature drop of the rolled material low, and allowing highly efficient continuous hot rolling to be carried out without reducing the rolling speed.

Furthermore, the present invention cuts the preceding rolled material and the subsequent rolled material,
It can be performed quickly and simultaneously, and crimping after cutting can be quickly carried out at the same location without moving on the rolling line, so spot welding, seam welding, etc. can be used to further strengthen the joint after crimping. Even with the addition of the auxiliary joining means, there is an advantage that the temperature drop of the rolled material can be kept low and highly efficient continuous hot rolling can be carried out.

Furthermore, the present invention has excellent workability because the means for cutting the rolled material is a sharp blade, unlike a thermal melting means (for example, a burner, etc.). Since cutting can be performed at the same time with the same cutting tool, the consistency when butting together after cutting is good, so there is almost no difference in level between the joint and the other parts after crimping, and therefore rough rolling is possible. It can prevent sudden load changes on the rolling mill during middle or finish rolling, and it can also prevent operational troubles without causing widening parts and ensure a good material yield, allowing continuous hot rolling with extremely high efficiency. It has the advantage of being able to carry out rolling.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a continuous hot rolling line showing one embodiment of the present invention, and FIGS. FIG. 2(a) is a plan view schematically showing an upper press, FIG. 2(b) is a plan view schematically showing a lower press, and FIGS. 3(a) to (e) are views showing the present invention. 3(a) is a side view of the traveling cart, and FIG. 3(a) is a side view of the traveling cart, and FIG.
is a plan view of the traveling trolley, and Figure 3 (C) is A in Figure 3 (a).
-A” direction cross-sectional view, FIG. 3(d) is a plan view of the wedge and tool rest portion, FIG. 3(e) is a detailed view of the blade portion, and FIGS. 4(a) to (C) are views of the present invention. FIG. 4(a) is a schematic view showing the state up to the cutting of the rear end of the preceding rolled material and the leading end of the trailing rolled material, and FIG. 4(a) shows the rear end of the preceding rolled material stopped on the upper surface of the lower press table. The schematic side view (Fig. 4, etc.) showing the state in the middle of lifting the part with a wedge is the side view when lifting of the rear end of the preceding rolled material is completed and the leading end of the trailing rolled material is stopped on the upper surface of the lower press table. The schematic diagram, Fig. 4 (C) shows the process of cutting the lower surface of the rear end of the preceding rolled material and the upper surface of the leading end of the succeeding rolled material by rotating the tool rest while pressing with a fulcrum roller at the rear end of the preceding rolled material. FIG. 5 is a schematic front view showing the inside state, and FIG. 5 is a front view showing a state in which the rear end of the cutting-processed preceding rolled material and the leading end of the following rolled material are abutted against each other on the upper surface of the lower press table, and the abutted parts are crimped and joined. Figures 6(a) and (b) are
The rear end of the cutting-processed leading rolled material and the leading end of the trailing rolled material are aligned and butted and crimped and bonded. FIG. 6(a) is before crimping bonding, and FIG. 6(a) is crimping bonding. The schematic diagrams after welding, Fig. 7(a) and (b), show the case where additional auxiliary welding is performed, Fig. 7(a) shows the case where spot welding is performed, and Fig. 7(b) shows the case where the seam is welded. FIG. 6 is a perspective view of a joint section showing a welded case. (Main reference numbers) 1 Winder, 2 Trailing rolled material, 21 Trailing rolled material tip, 3 Leading rolled material, 31
Rear end of previously rolled material, 4 Roller table, 5 Hot rolled material joining device, 6 Spot welder, 61.62 Welding terminal, 7
Looper, 71.72.73 Roller, 8 Finishing rolling machine, 9 Press, 91 Upper press stand, 92 Lower press stand, 93
Hydraulic cylinder, 10 Shielding plate, 101 Upper press stand shielding plate, 102 Mounting part, 103.202.15
39 bolt, sl gap, 104 lower press stand shielding plate, 11 non-oxidizing gas blowing means, 111 nozzle hole, 112 nozzle, G non-oxidizing gas, 113
piping, 114 non-oxidizing gas supply source, 115 on-off valve, 12 fulcrum roller, 121 lower fulcrum roller, 122 upper fulcrum roller, 13 wedge, 1
4 cutler post, 141 cutlery, 15 traveling trolley,
151 Steel plate, 1521 Front wheel, 1522 Rear wheel, 1531-, Axle, 1532.19 Bearing, 1
533.20 Bearing box, 1534.21 Rotating gear, 1535.22 Drive gear, 1536.2
3 Drive shaft, 1537.1543.24゛Electric motor,
1538 reinforcing plate, 154 clamping means, 15
41 Braking plate, 1542.18 Rotating shaft, 16
Rail, 161 Stopper, 171.172.174.1/75.177.178
Beam, 173.176.179 Frame, 201
Ear, 241 Installation plate, Fig. 3 (C) 141...7') 鐐13...Waen'14...Sword A Mokuhaku 141...Touyu Fig. 7 (ri) Fig. 7 ( b) 2... Rear ATff extension material 3... Front Iff force E material

Claims (8)

[Claims] (1) A press that is installed on the entry side of a rough rolling mill or a finishing rolling mill in a continuous hot rolling line and that crimps the hot rolled material, consisting of an upper press table and a lower press table, and a press that is placed on the side of the press. It is provided with a wedge for lifting the rolled material, and a plurality of cutters for cutting the rolled material integrally connected to the wedge for lifting the rolled material and on the outer periphery, and running in the width direction of the rolled material to cut the rolled material. A hot-rolled material joining apparatus comprising: a tool rest capable of lifting the rolled material with a wedge and capable of rotating and cutting the end of the hot-rolled material to be joined. (2) The hot-rolled material joining apparatus according to claim 1, wherein the press has a flat lower surface on the upper press stand. (3) The hot rolled material joining apparatus according to claim 1, wherein the press has a lower surface of an upper press table formed in a curved shape. (4) A shielding plate is provided around each side surface of the upper press stand and the lower press stand to surround the upper press stand and the lower press stand, respectively, and each of the shield plates has a shielding plate that surrounds the upper press stand and the lower press stand. A non-oxidizing gas blowing means is provided for blowing non-oxidizing gas into the gaps defined by the side surface of the table and the shielding plate, and the side surface of the lower press table and the shielding plate, respectively. A hot rolled material joining apparatus according to any one of claims 1 to 3. (5) A press that is installed on the entry side of a rough rolling mill or a finishing rolling mill in a continuous hot rolling line and that crimps the hot rolled material, consisting of an upper press table and a lower press table, and a press on the side of the press. It is provided with a wedge for lifting the rolled material, and a plurality of cutters for cutting the rolled material integrally connected to the wedge for lifting the rolled material and on the outer periphery, and running in the width direction of the rolled material to cut the rolled material. A tool rest configured to be able to lift the rolled material with a wedge and rotate to cut the end of the hot rolled material to be joined; and a lower press stand of the press on the continuous hot rolling line. A hot-rolled material joining device comprising: a pair of upper and lower fulcrum rollers that are disposed close to the rollers and are capable of sandwiching the hot-rolled material therebetween. (6) The hot-rolled material joining apparatus according to claim 5, wherein the press has a flat lower surface on the upper press stand. (7) The hot-rolled material joining apparatus according to claim 5, wherein the press has a lower surface of an upper press table formed in a curved shape. (8) A shielding plate is provided around each side surface of the upper press stand and the lower press stand to surround the upper press stand and the lower press stand, respectively, and each of the shield plates has a shielding plate that surrounds the upper press stand and the lower press stand. A non-oxidizing gas blowing means is provided for blowing non-oxidizing gas into the gaps defined by the side surface of the table and the shielding plate, and the side surface of the lower press table and the shielding plate, respectively. A hot rolled material joining apparatus according to any one of claims 5 to 7.