JPS6028563B2 - Hot rolled wire rod mouthing method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides the following advantages: By simultaneously forming a mouth portion of a desired shape on the end of a hot rolled wire rod during the hot rolling process,
This invention is intended to improve productivity by eliminating the complexity and labor of the gluing work required in subsequent secondary processing such as wire drawing.

When various metal materials are rolled and formed into hot-rolled wire rods using continuous rolling equipment with a large number of rolling roll stands, most of these wire rods, with the exception of a few, undergo wire drawing (including drawing) processing, that is, secondary processing. This secondary processing step varies depending on the material or application, but a typical example is hot rolled wire → heat treatment → pickling → coating → wire drawing → (heat treatment → Pickling → coating → wire drawing →) becomes the product.

The wire drawing process for this stylus and its wire diameter is adjusted to match the final use.
This is a process in which the cross-sectional area of the bran material is reduced using a forming die in order to obtain a shape, etc. Prior to this process, the end of the hot-rolled wire rod is reduced to an extent that it can pass through the forming die. It is necessary to perform a so-called machining process in which the part is drawn thin. Conventionally, when carrying out such a capping process, a hot-rolled wire rod is first heat-treated, pickled, and coated, and then transported to an end drawing machine called a capping machine.
At this point, the hot-rolled wire rod is finished with a spout, and the hot-rolled wire rod is wound into a coil at the end of the rolling process.
It is necessary to straighten the arc of the coiled wire into a straight line, and if the wire is a pongee wire or a wire with relatively low strength, it is possible to straighten the groove manually, but if the wire is a large wire or If the material is of ivy strength, it must be straightened using a straightening machine that uses hydraulic pressure or the like. The wire rod whose ends have been corrected to a predetermined length in this way is suspended in the air by a hoist or the like with its coiled circumferential portion suspended in the air by a hoist or the like. By infiltrating the grain, it is finished with a mouthpiece. In this case, coughing into the roll is done manually, and the coughing is also done by repeating it several times.In addition to the roll type, there are also swager type, crank type, etc. There are various types, but all of them require manual labor, which not only burdens the operator with excessive labor, but also often takes longer time to open and retract than to extend and retract. , unfavorable results will occur in terms of productivity and workability. The present invention has been made in order to solve the problems in the capping work in wire drawing and other wire secondary processing, and its particular feature is that the coil shape after finish rolling of the wire is fixed. During the rolling line until winding, the rolled wire is deflected from the center of the rolling line,
One end of the rolled wire rod deflected from the center of the rolling line is rolled to form a mouth part by a roll on the rolling line, and its unique feature is that it is used in finishing rolling lines in hot wire rolling equipment. A rolling stand for a head is installed between the rolling end of the rolled wire rod and a winding machine for the rolled wire, and the stand has a hole for forming a head and a hollow passage groove for the wire rod body on the opposing circumferential side. A pair of upper and lower rolling mill rolls arranged in parallel and partially aligned are rotatably installed, and the wire rod on the rolling line is passed through the mold hole or empty on the inlet side of the milling roll. The point is that a turnout for distributing to the ditch is arranged so as to be able to rotate freely.

The present invention will be described in detail below based on the illustrated embodiments.
The figure shows an example of continuous wire rolling equipment as an embodiment of the method and apparatus of the present invention.To explain the outline of the hot rolling process of wire rods in the figure, the raw material steel billet charging equipment is shown. The material from 51 enters a billet heating furnace 52 and is heated to an appropriate temperature, and this heated material enters a rough rolling mill row 53 where it is passed between the holes of each rolling roll and rough rolled as is known. Then, it passes through the flying shear 54 and is subjected to intermediate rolling in the next intermediate rolling mill row 55, and further enters the finishing rolling mill row 56 where it is finished rolled into a wire rod with a predetermined size and cross-sectional shape, and then passed through the rotary flying shear 57. It passes through the winding machine, such as a boring winding machine 58, and is wound into a coil, and then transferred from above the plate conveyor 59 to the hook conveyor 6.
0, the coils are sent onto a roll conveyor 61, separated by a coil binding machine 62, stored in a band holder 63 and banded, and then transported to a warehouse by a crane or the like and shipped one by one.

Others 64 are electrical rooms, 65 are roll shops, 66 are water treatment facilities, 67 are refining yards, 68 are millards, 69
70 is a refining yard, 70 is a Schlemann flock branching from the finishing mill row 56, 71 is a loop player, 72 is a loop conveyor, 73 is a collector, and 74 is a hook conveyor, and each shear 54, 57 is a continuous shear. This is a cutting device for cutting the top and bottom of the wire rod into appropriate lengths, and since these are all known mechanisms, the details will be omitted, but in any case, the conventional hot rolling equipment is schematically shown in Figure 1. After heating, billet materials and other materials made of various steel materials can be processed into rough, intermediate,
After going through a continuous rolling process such as a finishing mill row, it is formed into a wire rod with the required dimensions and cross-sectional shape, and this wire rod is wound into a coil shape by a winding machine to an appropriate length, bundled as appropriate, and shipped. . In such a continuous rolling facility, the present invention provides an opening by drawing a predetermined shape to the end of the bran bran that has been rolled to a predetermined size and cross-sectional shape and is successively wound into a coil. For this purpose, the wire that has passed through the final rolling roll stand on the rolling path is further passed through a roll, roller, or
It is only necessary to continuously pass the rolling mill through a machining mill equipped with pinch rolls or the like.

2 and 3 show an embodiment of a rolling stand with a neck according to the present invention. FIG. 2 is a partially vertical side view thereof, and FIG. 3 is a plan view thereof. It suffices to use the same type of rolling stand as the current rolling stand, and a pair of upper and lower facing rolls 1, 1 are rotatably mounted on the stand 6.

This roll, 1, as shown in detail in Figure 4,
First, a mold hole and a mouth for forming a mouth part are formed on the peripheral surface of the roll. The opening of this mold hole is a wire rod 7 as shown at N in Fig. 4.
This is for forming the opening part 7a at the end of the roll 1, and as shown in FIG.
With one circumference (i.e. 1'2 to 1 rotation of the roll), the mouth part 7a
The approximately semicircular hole shape gradually increases in width and width from the beginning to the end of the mold hole opening so that the end of the wire rod 7 can be tapered to form a suitable length. It is formed so that the depth is narrow and shallow, and the A-A cross section and the cross-sectional shapes of B-B, C-C, and D-D are shown at 0, m. Position B is the starting end side of the mold hole mouth, D-D is the final side of the mold hole mouth, and C-C is the intermediate position. By 1'2 rotations of the rolls 1, 1, a mouth portion 7a shown at W is formed. The length of this stub/mouth portion 7a depends on the wire material, but usually it is sufficient to have a length of about 250 to 50 mm. It depends, but generally speaking, when A is 20◇, B◇ is about 160. At this time, it is only necessary to form the rolling rolls 1, 1 on the end side of the required length of the wire rod 7, and the wire rod 7 is passed through a final rolling roll stand and rolled into a predetermined size and shape. The entire length of the wire rod 7, excluding the end side, must not pass through the die openings in the rolling rolls 1, 1 for opening.

For this purpose, in the present invention, recesses A and A are formed on the circumferential surface of the roll 1 for allowing passage of the part other than the part corresponding to the mouth part 7a of the rolling wire village 7. As shown in Fig. 4, the concave portions A and A are rolled and formed into a predetermined size and shape, so that the machine wire 7 does not come into contact with the roll circumferential surface at all, and is inserted adjacent to the mold hole opening and mouth side. In the example shown, it is a concave circumferential shape with the necessary depth and width, and in the example shown, the mold hole opening is limited to 1/2 of the circumference, so this mold hole opening is , Concave portions A and B are formed in an extended shape in the direction of the ball even over the remaining 1/2 circumferential length following the mouth. Now, when the rolled wire rod 7 is passed between the rolling rolls 1 and 1, the entire length of the wire rod 7 except for the end side is led to the air passage line formed by the recesses A and A, and the end In order to guide only the part where the mouth part 7a is formed on the side to the mold hole mouth and the mouth line by the mouth, a means for switching the course of the wire rod 7 is required.

As an embodiment of this switching means, the present invention uses a branch 2 as illustrated in FIGS. 2 and 3. This branching device 2 is a cylindrical body through which the rolled wire 7 sent out from the final rolling stand passes freely through a guide 8 as shown by the arrow P, and is supported by a pivot 9 so as to be horizontally pivotable.
A rod 3a of a drive cylinder device 3 such as a shower cylinder is connected to one side of the turnout 2, and a spring 10 is supported on the opposite side. That is, the rod 3 is driven by the shaft cylinder 3.
By moving the turnout 2 toward the opening line x side using its pivot 9 as a fulcrum,
The final end of the bran material 7 located inside is guided to the mold hole opening and mouth side of the rolls 1, 1, and by positioning it on the normal rolling line Y, the wire material 7 other than the processing at the mouth part is processed. This type of wire rod is passed through the V parts A and A of the rolls 1 and 1 to prevent it from being misguided to the mouth side of the mold hole. In the rolling process, the running speed of the wire rod after passing through the finishing rolling mill row is, for example, 18 h/sec when the green diameter is 12), or 180 h/sec.
Since the speed is considerably high, such as 13 h/sec in the case of When using the spring 10 on the opposite side in this way, the air cylinder device 3 is turned on in the example shown in the figure to hold the rod 3a in the forward position. When placing the turnout 2 on the rolling line Y and turning it to the line X for machining, turn off the cylinder device 3 and at the same time use the elastic force of the spring 10 to move the turnout 2 to the line X. When the rolling line Y is directed and returned to the normal rolling line Y, only the cylinder device 3 is used. Of course, it is possible to use other movement mechanisms as the switching means of the turnout 2. Mouth part 7 of the rolled wire rod 7
A branching device 2 is used to guide the tip part (the tip or rear end of the wire) to the tip line x to form the line a.
In order to switch over, it is necessary to detect in advance the part of the wire rod 7 that corresponds to the spout, and to operate the switch 2 before the part enters the spout rolling stand 6. As such, a switching means in a so-called V selector, which is a system distribution device for rolled wire used in conventional continuous rolling equipment for this type of wire, can be used.

In other words, in this kind of continuous rolling equipment for wire rods, next to the final rolling stand, a sliver cutting machine is installed like the rolling shear 57 in FIG. Furthermore, it is known that multiple cuts of the same wire are performed, a V selector is installed at the rear of this cutting machine, the cutting lines are sorted by system, and each is sent separately to the next process. As a sorting (switching) means in this V selector, the current position of the wire is detected by a photocell or other wire village detector installed at the final rolling stand or before it, and a timer or other timer that responds by sending a signal due to the detection. Accordingly, the V selectors are activated in a distributed manner. Therefore, since the branch 2 in the present invention is also one selector, the branch 2 is turned around the tip line X' for the tip processing, and the end of the wire is rolled for the tip processing. o-
When introducing the wire into the mold hole mouth side of No. 1, the current position of the moving wire is detected by a wire rod detector installed on the final rolling stand or before it, and a timer or other timing mechanism is activated accordingly. Then, as the turnout 2 rotates, the wire rod 7 that has entered the turnout 2 is moved to the line X.
All you have to do is guide it. That is, as shown schematically in FIG.
One or more detectors HL are provided to detect the position of the wire, and at the same time, a timing mechanism such as a timer is activated in response to a command from the detector HL to determine the position of the wire passing through the detection point. The processing part is the final rolling roll 11
, 11 and further passes through a scale cutter 12 to be cut.
As time elapses that is set in accordance with the required speed for the cut end to enter the turnout 2, the drive cylinder device 3 is driven to turn the turnout 2 to the mouth line It is sufficient if the end portions can be switched from the recesses A, A of the rolling rolls 1, 1 for opening to the openings of the mold holes. The moving speeds of the rod and the wire rod 7 differ depending on the wire diameter, so in order to ensure accuracy, it is necessary to
The moving speed of the approximate wire rod in step 1 is detected by a speed detector such as a pulse generator, and at this moving speed, the wire exits the rolling rolls 11, 11, passes through the blower 12, and is cut at the cut end. Find the time until it enters turnout 2,
After the scale cutting machine has cut the scale, after the above-mentioned time period has elapsed, a switching command is issued from a signal generator such as a pulse generator installed in the scale cutting machine,
The drive cylinder device 3 may be driven,
Various means can be used as the switching means including the subordinate V selector switching means. At this time, the switching operation is made early in terms of timing, and the cylinder pupil 3 is left in the switched state. It is also possible to switch from the recess A to the mold hole opening starting at the lotus passage part without the flange, which is the boundary between the recess A and the flange A.

As described above, the rolls 1 and 1 of the rolling stand 6 for finishing are
The opening of the mold for opening, the opening part 7a led to the opening, the recessed part A,
The non-opening portion of the wire rod 7 that passes through the stand 6 is connected to the common exit portion 4 of the stand 6, as illustrated in FIGS. 2 and 3.
is derived. This mouth part 4 is supported on a pedestal 5, and is made wide on the roll 1, 1 side and gradually becomes narrower so that it can reliably receive the non-mouthed part and the mouthed part 7a of the wire rod 7. Then, as mentioned earlier, the wire is sent to the winding line Z side of a boring winder or the like, and a spout 7a is formed at the final end of the wire wound into a coil. Therefore, when wire drawing or the like is performed on this wire, the mouth portion 7a, which is the starting end, can be immediately inserted into a drawing machine die or the like. The loop produced by the reduction of the area of the wire edge by forming the tip part 7a is only a small part of the edge, and can be sufficiently covered by the guiding device between the tip part and the winder. be.

Further, in the illustrated embodiment, the mouth portion 7a is formed in one pass, but this is not limited to one pass, and it goes without saying that two or more passes may also be possible. do not have.

As described above, the present invention is capable of simultaneously forming a mouth portion that will be required later at the end of a hot rolled wire rod during the continuous rolling process of hot rolled wire rods. There is no need to pull out one end of a coiled fastening product and re-seating it using a spouting part or the like, which saves a lot of effort and effort associated with the splicing work of a secondary kiln. can be omitted.

Moreover, according to this, the forming process of the mouth part can be carried out under hot rolling, so it is extremely easy to form. It can be used as a stand of 1, and it is extremely easy to pass the rolled rolls through the mouthed part and the non-mouthed part, as shown in the structure of the recessed part A and the mold hole opening in the embodiment, and it is difficult to cause any hindrance to the continuous rolling process. This method can be easily applied to the rolling equipment for hot-rolled wire rods in the secondary, and it is possible to omit the machining work in the secondary processing of various wire rods, and the effect is particularly noticeable in the case of large wire rods. It is.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an example of continuous rolling equipment for hot-rolled wire rods in which the present invention is implemented, FIG. 2 is a partially longitudinal side view of an embodiment of the apparatus of the present invention, and FIG. 3 is a plan view including an enlarged view of the same portion. FIG. 4 is a detailed view of the mill roll with a mouth and a mouth part, and FIG. 5 is an explanatory diagram of one example of branch switch switching control. 1...Rolling roll for opening, A...concavity, opening...mold hole,
2... Turnout, 3... Schilling device, 4... Outlet part, 5... Frame, 7... Wire rod, 7a... Mouth part. Figure 2 Ship Figure 3 Figure 4'' Figure 4 of Figure 4' Figure 5

Claims (1)

[Scope of Claims] 1. During the rolling line until the wire is wound into a coil after finish rolling, the rolled wire is deflected from the center of the rolling line, and one end of the rolled wire that is deflected from the center of the rolling line is rolled. 1. A method for gluing a hot rolled wire rod, which comprises rolling to form a girth part using rolls on a line. 2. A rolling stand for forming a cap is installed between the rolling end of a finishing rolling line in a hot rolling facility and a winding machine for rolled wire rods, and the stand is provided with a die for forming a cap on the opposing circumferential side. A pair of upper and lower rolling rolls are rotatably installed, which are arranged parallel to the empty passage grooves of the wire rod body and partially in communication with each other. 1. A spouting device for hot-rolled wire rods, characterized in that a branching device for distributing the wire rods into the mold holes or the air passage grooves is rotatably disposed.