JP5565274B2 - Method of adjusting the joint of rolls for deformed steel bars - Google Patents

Description

  The present invention relates to a method for adjusting the joint of a pair of rolls for rolling a deformed steel bar.

  As a deformed steel bar, as shown in FIG. 11, two ribs 2, 2 extending in the longitudinal direction at a position where the outer periphery of a columnar material is divided into two, and one outer periphery between the two ribs 2, 2 A plurality of first joints 3 formed on the surface in the longitudinal direction at a constant pitch P and the other outer peripheral surface between the two ribs 2 and 2 are half pitch (P / 2) with respect to the first joint 3 There is a deformed steel bar 1 having a phase shift (hereinafter referred to as P / 2 node pitch) and a plurality of second nodes 4 formed in the longitudinal direction at a constant pitch P (for example, Patent Document 1). The deformed steel bar 1 has different pitches P and knot pitches of the first joint 3 and the second joint 4 for each product diameter (products having different outer diameters).

  FIG. 12 shows a pair of rolls 5A and 5B in the final finishing pass, an outer peripheral shape of an arc surface shape that forms the outer periphery of the deformed steel bar 1, and an outer periphery that forms the first and second nodes of the deformed steel bar 1 A plurality of knuckle dies provided in the circumferential direction of the mold, and in the axial direction, the outer dies of different arcuate surface shapes are joined to the knuckle dies E1 to E4 (the pitch P of the knot dies E1 to E4. Are formed, and a plurality of types of deformed steel bars 1 having different product diameters can be formed by the pair of rolls 5A and 5B.

  A predetermined rolling die D1 of the pair of rolls 5A and 5B is selected, and as shown in FIG. 13, a roll 5A having a node type E1 of one roll 5A and a node type E1 of the other roll 5B as a P / 2 node pitch. , 5B is rotated, and the material S that has been rolled from the upstream rolling mill row is passed between the pair of rolls 5A, 5B, so that the rib 2 has a predetermined outer diameter and the phases are shifted from each other. The deformed steel bar 1 having the first node 3 and the second node 4 is formed.

  FIG. 14 shows a final finishing pass provided with the pair of rolls 5A and 5B described above. Reference numeral 6 denotes a stand that rotatably supports the pair of rolls 5A and 5B. Reference numeral 7 denotes a rotary drive source with a speed reduction mechanism. Reference numerals 8A and 8B are spindles that transmit the rotational force of the rotational drive source 7 to the pair of rolls 5A and 5B. Reference numerals 9A and 9B are coupled to the tip ends of the spindles 8A and 8B, and are connected to the ends of the pair of rolls 5A and 5B. A coupling, 10 is a lifting mechanism that lifts and lowers the spindles 8A and 8B.

  As shown in FIG. 15, one coupling 9 </ b> A is formed on one end side of the cylindrical member 9 a, a fitting hole portion 9 b into which the fitting convex portion 5 a 1 (see FIG. 12) of the roll 5 A is fitted, and the cylindrical member An inner peripheral gear 9c formed on the entire circumference inside the other end side of 9a, and an outer peripheral gear 9d formed on the entire outer periphery of the cylindrical member 9a, coupled to the tip of the spindle 8A, are formed on the inner circumference. A coupling boss 9e meshed with the gear 9c and a boss fixing flange 9f fixed to the other end side opening of the cylindrical member 9a via a fixing bolt and restraining the axial movement of the coupling boss 9e are provided. . In addition, the other coupling 9B coupled to the tip of the spindle 8B has the same configuration as the one coupling 9A.

By the way, when forming the deformed steel bar 1 with different product diameters in the final finishing pass, the node pitch is different for each product diameter, so that each time the product diameter is different, it is necessary to adjust the joint of the pair of rolls 5A and 5B. Become.
As a joint adjustment of the pair of rolls 5A and 5B, the gear meshing phases (inner peripheral gear 9c) of the spindles 8A and 8B and the couplings 8A and 8B that transmit the rotational driving force from the rotational driving source 7 to the pair of rolls 5A and 5B. And a method of adjusting the outer peripheral gear 9d) is known (for example, Patent Document 2).

In the following, this conventional roll knot adjustment procedure will be described with reference to FIGS.
First, when changing to a predetermined product diameter (for example, when changing from the rolling die D1 to the rolling die D2), first, the deformed bar 1 is formed by the rolling die D2 of the pair of rolls 5A and 5B, and the formed deformed bar 1 is formed. Measure the amount of deviation of the knot pitch.

Next, as shown in FIG. 14, the work deck 11 is disposed in the vicinity of the final finishing pass.
Next, as shown in FIG. 16, only the coupling 9B on the other roll 5B side removes the fixing bolt to separate the cylindrical member 9a and the boss fixing flange 9f. Then, by raising and lowering the spindles 8A and 8B by the raising operation of the raising / lowering mechanism 10, one coupling 9A rises together with the spindle 8A, and the other coupling 9B has a cylindrical member 9a fitted into the fitting hole 9b. The coupling boss 9e ascends together with the spindle 8B while remaining on the roll 5B side with the mating convex portion 5b1 fitted.

Then, the worker on the work deck 11 rotates the other coupling 9B by an amount corresponding to the shift amount of the node pitch.
When the rotation adjustment of the other coupling 9B is completed, the spindles 8A and 8B are moved up and down by the lowering operation of the lifting mechanism 10, and the one coupling 9A is fitted into the fitting convex portion 5a1 of the one roll 5A. Then, the coupling boss 9e of the other coupling 9B is arranged in the cylindrical member 9a, and the cylindrical member 9a and the boss fixing flange 9f are fixed via fixing bolts.

JP-A-7-323302 (FIG. 3) Japanese Utility Model Publication 4-14833

By the way, the above-described roll knot adjustment operation is performed every time the deformed steel bar 1 having a different product diameter is formed, and the time required for one operation is several tens of minutes. In view of this, it is desired to reduce the roll adjustment work.
Here, on the outer periphery of one roll 5A, a first reference line is provided along the axial center, and specific node types E1 to E4 of each of the rolling dies D1 to D4 are provided on the first reference line, while the other A second reference line extending along the axis is also provided on the outer periphery of the roll 5B, and the second reference line is located at a half pitch between the adjacent node dies E1 to E4 of the rolling dies D1 to D4. When the pair of rolls 5A and 5B is rotated with the reference line extending so that the first reference line and the second reference line coincide with each other, it is not necessary to adjust the roll joint for each product diameter. it is conceivable that.

However, in the actual machine, the rolls 5A. There is a fitting gap between the fitting protrusions 5a1 and 5b1 of 5B and the fitting holes 9b of the couplings 9A and 9B, and this fitting gap causes the first reference line and the second reference line. It is difficult to rotate the pair of rolls 5A and 5B with the same.
Accordingly, the present invention has been made paying attention to the unsolved problems of the above-described conventional example, and it is not necessary to perform knotting every time a deformed steel bar having a different product diameter is formed, and knotting can be performed with high accuracy. An object of the present invention is to provide a method for adjusting the knotting of a roll for rolling a deformed steel bar that can be performed.

  In order to achieve the above object, the method for adjusting joints of a roll for rolling a deformed steel bar according to the present invention is a method for adjusting the joint of a pair of rolls that form a deformed steel bar by passing a material between the rolls. In addition, couplings are coupled to the ends of the pair of rolls by fitting, and spindles that transmit rotational driving force are coupled to the couplings via the power transmission gear unit, and the pair of rolls is A plurality of types of rolling dies are formed in the roll axis direction, and each of the plurality of types of rolling dies is formed with a plurality of knots at a predetermined pitch along the circumferential direction of the roll, and the pitch interval between the knots Are formed differently for each type of rolling mold, and one roll of the pair of rolls has a first reference line on the outer circumference along the roll axis, and one of the node types of each type of rolling mold matches. Formed as before The other roll of the pair of rolls is formed such that the second reference line on the outer circumference along the roll axis extends to a position of 1/2 pitch between two adjacent node types of each type of rolling die. A first alignment mark is formed at a position corresponding to the first reference line of a predetermined outer peripheral surface of the one roll, and coincides with the second reference line of a predetermined outer peripheral surface of the other roll, A second alignment mark is formed at a position opposite to the first alignment mark, and the measurement rod is passed between the predetermined outer peripheral surfaces by the rotational drive of the pair of rolls, and the measurement rod The first step of forming a pair of measuring bar marks at positions corresponding to the first and second alignment marks, and measuring the distance between the pair of measuring bar marks as a deviation amount, based on the adjustment data calculated in advance, The power transmission gear as an adjustment amount to eliminate the deviation amount A second step of determining the number of adjustment gears, and a third step of separating the spindle coupled to one of the pair of rolls and the coupling and adjusting the rotation of the coupling to the number of adjustment gears; It has.

  According to a second aspect of the present invention, in the knot adjusting method for the deformed steel bar rolling roll according to the first aspect, the power transmission gear portion includes a male spline formed on a front end side outer periphery of the spindle, and the spindle. A female spline formed on an inner diameter portion of a coupling boss coupled to a tip and meshing with the male spline; an outer peripheral gear formed on an outer periphery of the coupling boss; and the coupling boss disposed inside the coupling boss. An inner peripheral gear that is formed on the inner periphery and meshes with the outer peripheral gear. In the second step, the adjustment gear number of the inner peripheral gear is used as an adjustment amount that eliminates the deviation amount based on the adjustment data. And the number of adjusting gears of the female spline, and in the third step, the spindle connected to one of the pair of rolls and the coupling boss Were separated, the inner rotating adjusting the coupling to the number of the adjusting gear circumferential gear were to be rotated adjusting the coupling boss to the number of the adjusting gear the female spline.

  According to the method for adjusting the joint of rolls for deformed bar rolling according to claim 1 according to the present invention, the first step is a state in which the first reference line of one roll does not coincide with the second reference line of the other roll. The second step determines the number of adjustment gears of the power transmission gear unit as an adjustment amount that eliminates the deviation amount, and the third step rotates the coupling to the number of adjustment gears. The shift amount is eliminated by making the first reference line and the second reference line coincide with each other. Therefore, according to the present invention, it is possible to adjust the knots of the roll with high accuracy, and any of a plurality of types of knots having different pitch intervals formed in the roll axis direction can be used. The first knuckle is formed at a constant pitch on one outer circumferential surface, and the other outer circumferential surface between the two ribs has a constant pitch with the phase of the P / 2 knot pitch shifted from the first knot. As a result, a second section is formed, and a highly accurate deformed steel bar can be obtained.

  In the roll knot adjustment method of the present invention, the first reference line of one roll coincides with one of each type of knot, and the second reference line of the other roll is adjacent to each type of rolling mold. Because it extends to the 1/2 pitch position between the two knots, there is no need to adjust the roll knots each time a deformed bar with a different product diameter is formed, improving the production efficiency of the deformed bar Can be made.

  Further, according to the method for adjusting the joint of the rolls for rolling a deformed steel bar according to claim 2, as the adjustment amount for eliminating the deviation amount of the pair of rolls, the adjustment gear number of the inner peripheral gear and the adjustment gear number of the female spline are: Since the coupling is rotated and adjusted to the number of adjustment gears of the inner peripheral gear, and the coupling boss is adjusted to rotate to the number of adjustment gears of the female spline, fine adjustment of the roll jointing can be performed. .

It is a figure which shows the shape of a pair of roll which concerns on this invention. It is a figure which shows the coupling and spindle which transmit rotational driving force to a pair of roll which concerns on this invention. It is an AA arrow directional view of FIG. It is a flowchart which shows the procedure of the knot adjusting method of the roll for a deformed bar rolling according to the present invention. It is a figure which shows the state which passed the measuring rod between a pair of rolls in the knot adjustment method of the roll for rolling a deformed steel bar according to the present invention. It is a figure which shows a pair of measuring bar mark formed in the measuring bar. It is the schematic which shows the gap | deviation adjustment table | surface used with the knot adjustment adjustment method of the roll for deformed bar rolling according to the present invention. It is a figure which shows the state which is carrying out the rotation adjustment of the coupling to the adjustment gear number of an inner peripheral gear in the 3rd process of the joint adjustment method of the roll for a deformed bar rolling according to this invention. It is a figure which shows the preparation for isolate | separating a coupling boss | hub from a spindle in the 3rd process of the knot adjustment adjustment method of the roll for rolled-shaped bar steel which concerns on this invention. It is a figure which shows the state which is carrying out the rotation adjustment of the coupling boss | hub to the adjustment gear number of a female spline in the 3rd process of the knot adjustment adjustment method of the roll for a deformed bar rolling which concerns on this invention. It is a figure which shows the shape of the deformed steel bar which concerns on this invention. It is a figure which shows a pair of roll only for forming the conventional deformed steel bar. It is a figure which shows the state by which a raw material is passed between a pair of rolls, and a deformed steel bar is formed. It is a figure which shows the equipment of a final finishing pass. It is a figure which shows the connection state of a spindle, a coupling, and a roll. It is a figure which shows the state which raised the spindle and isolate | separated from a pair of roll in the 3rd process of the conventional roll joint adjustment method.

DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same component as the structure shown in FIGS. 11-16, and description is abbreviate | omitted.
FIG. 1 shows a pair of rolls 5A and 5B according to an embodiment for performing a method for joining the rolls for rolling a deformed steel bar according to the present invention.

  A first reference line M1 extending along the axial center is provided on the outer periphery of the one roll 5A, and the plurality of rolling dies D1 to D4... Spaced apart in the axial direction are the first reference line M1. .. Are provided on the reference line M1, and other node types E1 to E4... Are provided along the circumferential direction of the roll 5A at a predetermined pitch interval from the node types E1 to E4. Yes. The pitch intervals of the node types E1 to E4 are different, that is, the rolling dies D1 to D4 are of different types.

  Further, a second reference line M2 extending along the axis is also provided on the outer periphery of the other roll 5B, and the rolling die D1 is formed of the adjacent node types E1, E1 with a predetermined pitch interval. The reference line M2 is provided so as to extend at a half pitch position therebetween. Also, the other types of rolling dies D2 to D4, which are provided apart from each other in the axial direction, also have a second reference line M2 at a position of 1/2 pitch between adjacent node dies with a predetermined pitch interval. Is provided to extend.

Further, the first reference line M1 extends also to the roll flange 5a2 (cylindrical portion other than the rolling dies D1 to D4...) Of one roll 5A, and the roll flange 5a2 overlaps the first reference line M1. A concave first alignment mark 12 is formed.
The second reference line M2 extends also to the roll flange 5b2 of the other roll 5B, and a concave second alignment mark 13 is formed at a position overlapping the second reference line M2 of the roll flange 5a2. .

  As shown in FIGS. 2 and 3, one coupling 9A of this embodiment includes a female spline 9g formed on the entire circumference of the inner diameter portion provided in alignment with the axis of the coupling boss 9e, and a spindle 8A. A male spline 9h that is formed over the entire outer periphery of the tip and meshes with the female spline 9g, and a fixing bolt 9j that fixes the bottom 9i of the coupling boss 9e and the end surface of the spindle 8A are provided at the tip of the spindle 8A. Are combined. In addition, the other coupling 9B coupled to the tip of the other spindle 8B has the same configuration as the one coupling 9A.

Next, the roll knot adjustment method of this embodiment will be described with reference to FIGS.
As shown in FIG. 4, the roll knot adjustment method of this embodiment includes a mark formation step S1, a mark shift amount measurement step S2, an adjustment gear determination step S3, a spindle and coupling separation step S4, and a coupling rotation adjustment step. S5, a step S6 for separating the spindle and the coupling boss, a boss rotation adjusting step S7, and a step S8 for coupling the spindle and the coupling.

First, as shown in FIG. 5, in the mark forming step S1, an annealing wire having an outer diameter slightly thicker than the distance between the roll flanges 5a2 and 5b2 of the pair of rolls 5A and 5B is used as the measuring rod 15. The final finishing pass is temporarily brought online with the measuring rod 15 being passed between 5a2 and 5b2.
As shown in FIG. 6, the outer periphery of the measuring rod 15 that has passed between the roll flanges 5a2 and 5b2 corresponds to the concave first and second alignment marks 12 and 13 formed on the roll flanges 5a2 and 5b2. Convex-shaped first measurement bar mark 15a and second measurement bar mark 15b are formed at the positions.

  Next, the mark shift amount measurement step S2 measures the shift amount in the axial direction of the first measurement bar mark 15a and the second measurement bar mark 15b of the measurement bar 15. As shown in FIG. 6, when the first measurement bar mark 15a and the second measurement bar mark 15b are shifted by L mm in the axial direction, the first reference line M1 provided on one roll 5A and the other roll The second reference line M2 provided on 5B is shifted by L mm in the circumferential direction.

Next, the adjustment gear determination step S3 determines the number of coupling adjustment gears and the number of adjustment female splines of the coupling boss from the deviation amount measured in the mark deviation amount measurement step S2, based on the deviation adjustment table shown in FIG. The deviation adjustment table is the total number obtained by multiplying the adjustment gear number Q1 and the adjustment female spline number R1, and is set from a small value to a large deviation amount.
Here, the number of coupling adjustment gears is the total number of Q inner peripheral gears formed on the cylindrical member 9a of the other coupling 9B, with the angle at which the other coupling 9B is rotated as an adjustment amount eliminating the deviation amount L. This is indicated by the number of gears of 9c.
The number of adjusting female splines is the angle by which the coupling boss 9e constituting the other coupling 9B is rotated as an adjustment amount for eliminating the deviation amount L. Of the total number R of female splines of the coupling bosses 9e, The number of gears is shown.

In the deviation adjustment table of FIG. 7, the horizontal axis indicates the number of coupling adjustment gears, the vertical axis indicates the number of adjustment female splines of the coupling boss, The amount of deviation calculated in advance is written at a position corresponding to the number of splines.
As a result, the amount of axial displacement of the first measurement rod mark 15a and the second measurement rod mark 15b measured in the mark displacement amount measurement step S2 was Lmm (see FIG. 6), so refer to the displacement adjustment table of FIG. Then, the number of coupling adjustment gears is determined as Q1, and the number of adjustment female splines of the coupling boss is determined as R1.

  Next, in the spindle and coupling separation step S4, as shown in FIG. 16 described above, only the coupling 9B on the other roll 5B side is detached from the cylindrical member 9a and the boss fixing flange 9f by removing the fixing bolt. Then, by lifting and lowering the spindles 8A and 8B by the lifting operation of the lifting mechanism 10, one coupling 9A is lifted together with the spindle 8A, and the other coupling 9B has a cylindrical member 9a fitted into the fitting hole 9b. The coupling boss 9e ascends together with the spindle 8B while remaining on the roll 5B side with the mating convex portion 5b1 fitted.

Next, in the coupling rotation adjusting step S5, as shown in FIG. 8, the cylindrical member 9a on the side of the coupling 9B fitted to the fitting convex portion 5b1 of the other roll 5B is replaced with the number of coupling adjustment gears. Rotate by the adjustment amount of Q1.
Next, in step S6 for separating the spindle and the coupling boss, as shown in FIG. 9, the coupling boss 9e fixed to the tip of the other spindle 8B is received by a boss receiving member 16 which can be raised and lowered. Next, the fixing bolt 9j is removed so that the spindle 8B and the coupling boss 9e can be separated.

Next, in the boss rotation adjusting step S7, as shown in FIG. 10, the boss receiving member 16 is lowered to cancel the spline coupling state of the spindle 8B and the coupling boss 9e. Then, the coupling boss 9e is rotated by the adjustment of the adjustment female spline number R1 of the coupling boss.
Further, in the step S8 for coupling the spindle and the coupling, the separated spindles 8A and 8B and the pair of rolls 5A and 5B are sequentially connected in the reverse operation to the separation operation described above, and the rotational driving force of the rotational driving source 7 is obtained. Are coupled to the pair of rolls 5A and 5B so that the spindles 8A and 8B can be transmitted to the pair of rolls 5A and 5B.

  The first step of the present invention corresponds to the mark forming step S1, the second step of the present invention corresponds to the mark deviation amount measuring step S2 and the adjustment gear determining step S3, and the third step of the present invention is the spindle and Corresponding to the coupling separation step S3 to the boss rotation adjusting step S7, the predetermined outer peripheral surface of the present invention corresponds to the roll flanges 5a2 and 5b2.

Next, the effect of this embodiment is demonstrated.
The mark forming step S1 and the mark shift amount measuring step S2 of the above-described roll knot adjustment method include the roll 5A. Due to the fitting gap between the fitting protrusions 5a1 and 5b1 of 5B and the fitting holes 9b of the couplings 9A and 9B, the first reference line M1 of one roll 5A and the first of the other roll 5B The state where the two reference lines M2 do not match is measured by the deviation amount L.

  In the adjustment gear determination step S3, the amount of rotation of the coupling 9B as the adjustment amount for eliminating the deviation amount L is determined as the adjustment gear number Q1, and the amount of rotation of the coupling boss 9e is determined as the adjustment female spline number R1. In the ring rotation adjustment step S5, the cylindrical member 9a on the coupling 9B side is rotated by the adjustment amount of the adjustment gear number Q1, and in the boss rotation adjustment step S7, the coupling boss 9e is rotated by the adjustment of the adjustment female spline number R1. Thus, the first reference line M1 of one roll 5A and the second reference line M2 of the other roll 5B are made coincident (the displacement amount L is eliminated).

  Therefore, in the present embodiment, the rolls can be adjusted with high precision, and the pair of rolls 5A and 5B in which the first reference line M1 and the second reference line M2 match each other have a rolling die D1 having a different product diameter. Even if any of D4... Is used, the first joint 3 is formed at a constant pitch P on one outer peripheral surface between the two ribs 2 and 2, and the other outer periphery between the two ribs 2 and 2. On the surface, the second joint 4 is formed at a constant pitch P in a state where the phase of the P / 2 joint pitch is shifted with respect to the first joint 3, and a highly accurate deformed steel bar 1 can be obtained.

And the roll joint adjustment method of this embodiment is provided so that the 1st reference line M1 of one roll 5A may correspond to the node type | mold E1-E4 ... of each rolling die D1-D4 ..., and the other roll The second reference line M2 of 5B is provided so as to coincide with the position of 1/2 pitch between the adjacent E1 to E4 of the rolling dies D1 to D4, and the first reference line M1 and the second reference line. Since M2 is matched, there is no need for a roll joint adjusting method for each of the deformed steel bars 1 having different product diameters, and the manufacturing efficiency of the deformed steel bar 1 is improved by reducing the joint adjusting work. be able to.
Further, the deviation adjustment table shown in FIG. 7 of the present embodiment is a total number obtained by multiplying the adjustment gear number Q1 and the adjustment female spline number R1, and a small deviation amount can be set. Can be finely adjusted.

The conventional roll knot adjustment method (method of rotating only the coupling 9B) can be adjusted in units of 24mm with one gear when the inner diameter of the cylindrical member 9a is 343mm and the number of inner peripheral gears 9c is 47. Can not.
However, the roll knot adjustment method of the present invention enables fine adjustment by utilizing the female spline 9g of the coupling boss 9e in addition to the coupling 9B. That is, for example, when the number of teeth of the female spline 9g is 22 threads, the number of gears of the coupling 9B × the number of teeth of the female spline 9g = 47 × 22 = 1034 can be adjusted, and a minimum adjustment of 1.1 is possible. It becomes.

  In addition, the conventional method of adjusting the roll joint every time the deformed bar 1 having a different product diameter is formed requires an average of 5 rolls / month (working time approximately 2 hours / month). I was trying. On the other hand, the present invention in which the roll knot adjustment work is performed only when the pair of rolls 5A5B is mounted in the finish rolling pass has a work frequency of once every three years.

  DESCRIPTION OF SYMBOLS 1 ... Deformed bar steel, 2 ... Rib, 3 ... 1st section, 4 ... 2nd section, 5A ... One roll, 5B ... The other roll, 5a ... Cylindrical member, 5a1 ... Fitting convex part, 5a2, 5b2 ... Roll Flange, 6 ... stand, 7 ... rotational drive source, 8A, 8B ... spindle, 9A, 9B ... coupling, 9a ... cylindrical member, 9b ... fitting hole, 9c ... inner peripheral gear, 9d ... outer peripheral gear, 9e ... Coupling boss, 9f ... boss fixing flange, 9g ... female spline, 9h ... male spline, 9i ... bottom, 9j ... fixing bolt, 10 ... lifting mechanism, 11 ... work deck, 12 ... first alignment mark, 13 ... second Alignment mark, 15 ... measuring bar, 15a ... first measuring bar mark, 15b ... second measuring bar mark, 16 ... boss receiving member, D1-D4 ... rolling die, E1-E4 ... node type, L ... deviation amount, M1 ... first reference line, M2 ... second reference line, ... pitch, Q1 ... adjust the number of gears, R1 ... adjustment female spline number, S ... Material

Claims (2)

A method for adjusting the joint of a pair of rolls that form a deformed steel bar by passing a material between the rolls,
Couplings are coupled to the end portions of the pair of rolls by fitting, and a spindle that transmits the rotational driving force via the coupling and the power transmission gear unit is coupled.
In the pair of rolls, a plurality of types of rolling dies are formed in the roll axis direction, and the plurality of types of rolling dies are each formed with a plurality of node shapes at a predetermined pitch along the circumferential direction of the roll, The pitch pitch of the knot type is formed to be different for each type of rolling die,
One roll of the pair of rolls is formed such that one of the types of rolling knives coincides with the first reference line on the outer periphery along the roll axis,
The other roll of the pair of rolls is such that the second reference line on the outer circumference along the roll axis extends to a position of 1/2 pitch between two adjacent node types of each type of rolling die. Formed,
Forming a first alignment mark at a position corresponding to the first reference line on a predetermined outer peripheral surface of the one roll;
A second alignment mark is formed at a position that coincides with the second reference line on a predetermined outer peripheral surface of the other roll and faces the first alignment mark;
A first step of forming a pair of measuring bar marks at positions corresponding to the first and second alignment marks of the measuring bar by passing the measuring bar between the predetermined outer peripheral surfaces by rotational driving of the pair of rolls. When,
A second step of measuring a distance between the pair of measuring bar marks as a shift amount, and determining an adjustment gear number of the power transmission gear portion as an adjustment amount for eliminating the shift amount based on adjustment data calculated in advance;
A third step of separating the spindle connected to one of the pair of rolls and the coupling, and adjusting the rotation of the coupling up to the number of adjustment gears. A method for adjusting the knotting of rolling rolls. The power transmission gear portion includes a male spline formed on an outer periphery on the tip side of the spindle, a female spline formed on an inner diameter portion of a coupling boss coupled to the tip of the spindle and meshing with the male spline, and the coupling An outer peripheral gear formed on the outer periphery of the boss, and an inner peripheral gear formed on the inner periphery of the coupling that disposes the coupling boss therein and meshing with the outer peripheral gear.
In the second step, based on the adjustment data, an adjustment gear number of the inner peripheral gear and an adjustment gear number of the female spline are determined as adjustment amounts for eliminating the deviation amount,
In the third step, the spindle connected to one of the pair of rolls and the coupling boss are separated, the rotation of the coupling is adjusted to the number of adjustment gears of the inner peripheral gear, and the female spline is adjusted. 2. The method for adjusting the joint of rolls for deformed steel bar rolling according to claim 1, wherein the coupling boss is rotationally adjusted up to the number of adjusting gears.

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