JP5941272B2 - Inlet roller guide - Google Patents

Description

  The present invention relates to an inlet roller guide for guiding a billet.

When a billet, which is a material to be rolled, is rolled into a wire rod or steel bar by a roll rolling mill, it is installed on the entrance side of the housing of the rolling stand, and billets of various sizes are made using a pair of guide rollers. An entrance roller guide that guides toward the entrance while holding is disclosed (Japanese Patent Laid-Open Nos. 2001-71016, 2001-71017, and 2003-53413, etc.).
For example, in the entrance roller guide device described in Japanese Patent Application Laid-Open No. 2001-71016, a pair of roller holders with a fulcrum shaft as the center is attached to the guide box, and the first roller support shaft is the center of rotation at the tip of each roller holder. The main guide roller is provided with a sub-guide roller centered on the second roller support shaft that is eccentrically provided on the rear end side with respect to the fulcrum shaft. The center adjustment mechanism includes a center pinion provided at the upper part of the adjustment shaft and a gear wheel of the first upper eccentric part provided at the upper part of the fulcrum shaft. And the first and second upper eccentric portions are rotatable (see the summary column on the first page of the publication).

JP 2001-71016 A JP 2001-71017 A JP 2003-53413 A

In the billet sizing rolling process, the inlet roller guide device can set the holding force adapted to the changed size by the inter-center adjusting mechanism with respect to the change of the billet size.
However, the guide that guides the billet immediately after leaving the heating furnace is exposed to high temperatures and adverse environments such as scales, so a friction guide and a roller guide with a fixed gap between the material passing surfaces are often used. These guides cannot deal with many kinds of billets, and the actual situation is that the guides are changed every time the billet size is changed. This guide replacement is burdensome to the operator, and the stop time of the rolling work accompanying the replacement becomes long, resulting in a problem that the work efficiency is lowered. Therefore, in order to reduce the number of inlet roller guide replacements as much as possible, a large-sized inlet roller guide that can handle various types of size changes, that is, a large billet to a small one has been installed. In this example, when guiding a billet with a small size, a biting failure occurred in the first rolling stand.
An object of the present invention is to provide an inlet roller guide that can cope with various kinds of billet size changes without replacement work.

The first feature of the inlet roller guide according to the present invention is an inlet roller guide disposed in a first rolling stand that passes billets immediately after leaving the heating furnace, and a guide box and a fulcrum on the guide box A pair of roller holders with pins attached as the center of rotation, the tip protruding from the exit side of the guide box, and a pair of guide rollers arranged with the roller pin as the center of rotation on the tip side of each roller holder; And a center adjustment mechanism for adjusting the center of the guide roller. Each fulcrum pin and each roller pin are inserted into pin holes respectively opened in the guide box and each roller holder. The inter-center adjusting mechanism is arranged to face each other along a driving source, a center pinion to which the rotational driving force from the driving source is transmitted, and a direction intersecting the guide direction of the billet across the center pinion. A pair of transmission gears meshed with the center pinion, a pair of gear wheels meshed with both transmission gears and provided in an eccentric state above the respective fulcrum pins, and the both transmission gears meshing and is provided with a gear wheel for the guide rollers of the pair is provided on each eccentrically on the top of each roller pin. Between the upper lower surface of the guide box and each of the roller holders, a gap for preventing contact accompanying thermal expansion of each other is opened. The gear wheels for the pair of roller holders are opposed to the pair of guide roller gear wheels along the guide direction of the billet.
A second feature of the inlet roller guide according to the present invention is that the first feature is provided, and a nose is attached to the front end portion of each roller holder, and the rear end side is between the two roller holders. An entry guide that protrudes from the entrance side of the box is arranged, the transmission gear is an idle gear, and the gap for preventing contact due to thermal expansion is between the lower surface of the upper plate portion of the guide box and the roller holder. It is in being opened.

According to the present invention, since the center adjustment mechanism that enables the center adjustment of the guide roller through the transmission gear that receives the rotational driving force from the drive source is provided, it is possible to change the billet of various sizes. Therefore, it is possible to cope without exchanging the main body of the entrance roller guide, and the burden of exchanging the main body of the entrance roller guide can be suppressed.
Further, according to the present invention, since the thermal effect due to the high temperature can be avoided by opening a gap between the lower surface of the upper portion of the guide box and the roller holder, the billet can be reliably guided even at a high temperature.

It is a top view which shows the entrance roller guide which concerns on this invention, Comprising: It is a figure which notched some gear covers. It is a front view which shows the entrance roller guide which concerns on this invention, Comprising: It is a figure which notched some gear covers. It is a side view which shows the entrance roller guide which concerns on this invention, Comprising: It is a figure which notched some gear covers. It is sectional drawing which shows the attachment state of the fulcrum pin in the entrance roller guide which concerns on this invention, a roller pin, and a guide roller, Comprising: It is a figure which notched some gear covers. It is a side view which shows the relationship between a billet and a guide roller.

The inlet roller guide according to the present invention will be described with reference to the drawings.
In the entrance roller guide shown in FIGS. 1 to 3, a guide box 1 having a guide base at the bottom is assembled by an upper plate portion 1a, a lower plate portion 1b, and struts 1c and 1d connecting these two plate portions. It has been. A pair of roller holders 2 are arranged in the guide box 1, and these roller holders are respectively mounted around the fulcrum pin 3 as the center of rotation. The tip of each roller holder 2 protrudes toward the exit side (right side in FIG. 1) of the guide box 1. The tip of each roller holder 2 protrudes toward the inlet side of the rolling roll 6. A nose 7 is fixed by bolts 8 on the inner facing surface of the tip of each roller holder 2 (FIG. 1). In addition, a pair of guide rollers 4 is provided on the front end side of each roller holder 2 with the roller pin 5 as a rotation center. The pair of guide rollers 4 is attached to the roller pin 5 via a bearing portion (not shown) provided in the shaft center portion and incorporating a bearing. An entry guide 9 is disposed between the pair of roller holders 2. The entry guide 9 has a rear end side (left end side in FIG. 2) protruding from the entry side of the guide box 1. The entry guide 9 is connected to the roller holder 2 by a bolt 10.
The inlet roller guide shown in FIG. 2 is arranged on the first rolling stand (not shown) that passes the billet immediately after leaving the heating furnace (or melting furnace). A gap 11 for preventing contact with each other due to thermal expansion is opened. This gap is formed between the lower surface of the upper plate portion 1 a that is the upper lower surface of the guide box 1 and each roller holder 2. Since the gap 11 can suppress the influence of heat at a high temperature on the guide box 1 and each roller holder 2 as much as possible, the operation of each roller holder can be performed smoothly.

In FIG. 4, each fulcrum pin 3 is connected to the upper and lower plate portions via the pin holes 1 a 1 and 1 b 1 opened in the upper and lower plate portions 1 a and 1 b of the guide box 1 and the pin hole 2 a opened in the roller holder 2. Inserted into the roller holder.
Each roller pin 5 is attached to each of the upper and lower plate portions and the roller holder via pin holes 1a2 and 1b2 opened in the upper and lower plate portions 1a and 1b of the guide box 1 and a pin hole 2b opened in the roller holder 2. Has been inserted.

In FIG. 1 to FIG. 4, the entrance roller guide is provided with a center adjustment mechanism 12 for adjusting the center of the pair of guide rollers 4, and this center adjustment mechanism will be described below.
1 includes a hydraulic motor 13 as a drive source, a center pinion 14, a pair of idle gears 15, a gear wheel 16 for a pair of roller holders, and a gear wheel 17 for a pair of guide rollers. ing.
As shown in FIG. 3, the hydraulic motor 13 is provided with hydraulic hose connection ports 13a and 13b, and the rotational speed of the hydraulic motor is adjusted by adjusting the amount of hydraulic oil supplied from the hydraulic hose.
As shown in FIG. 1, the center pinion 14 is installed on the guide box 1, and the rotational driving force from the hydraulic motor 13 is transmitted to the center pinion 14.
As shown in FIG. 1, the idle gear 15 that is a pair of transmission gears is disposed oppositely along a direction (up and down in the drawing) that intersects the billet guide direction with the center pinion 14 interposed therebetween. Both idle gears 15 mesh with the center pinion 14, respectively.
In FIG. 1 and FIG. 4, the gear wheel 16 for the pair of roller holders is mounted on the upper part of each fulcrum pin 3. The pair of gear wheels 16 and each fulcrum pin 3 are in an eccentric positional relationship. The teeth of the gear wheel 16 mesh with the idle gear 15 respectively. The shaft portion of the gear wheel 16 is rotatably fitted in the pin hole 1 a 1 of the guide box 1. The lower part of each fulcrum pin 3 is inserted in an eccentric state in an eccentric piece 18 fitted in the pin hole 1b1 of the guide box 1.
In FIG. 1 and FIG. 4, gear wheels 17 for a pair of guide rollers are respectively mounted on the upper portions of the roller pins 5. The gear wheel 17 and each roller pin 5 are in an eccentric positional relationship. The teeth of the gear wheel 17 mesh with the idle gear 15 respectively. The shaft portion of the gear wheel 17 is rotatably fitted in the pin hole 1 a 2 of the guide box 1. The lower part of each roller pin 5 is inserted in an eccentric state in an eccentric piece 19 fitted in the pin hole 1b2 of the guide box 1. The lower end portion of each roller pin 5 is held by the guide box 1 by a nut 20.
In FIG. 1, a gear wheel 16 for a roller holder and a gear wheel 17 for a guide roller positioned on the upper side of the drawing are arranged to face each other along the billet guide direction (the left-right direction in the drawing), and positioned on the lower side. The roller wheel gear wheel 16 and the guide roller gear wheel 17 are also arranged opposite to each other along the guide direction.
1 and 4, reference numeral 21 denotes a gear cover.

When the hydraulic motor 13 is actuated in the center-to-center adjustment mechanism 12, the center pinion 14 is driven to rotate, so the pair of idle gears 15 meshing with the center pinion also rotate, and the left side of FIG. Since the gear wheels 16 for the pair of roller holders that are positioned rotate, the respective fulcrum pins 3 that are eccentrically positioned with respect to these gear wheels rotate eccentrically, and this rotation causes the pair of roller holders 2 to rotate. Since it rotates eccentrically around the fulcrum pin, between the opposing roller holders, the entry guide 9 and the nose become wider or narrower at the same time.
Simultaneously with the rotation of the gear wheel 16 for the pair of roller holders, the gear wheel 17 for the pair of guide rollers positioned on the right side in FIG. 1 rotates, so that each roller eccentrically positioned with respect to these gear wheels. The pin 5 rotates eccentrically, and the center of the pair of guide rollers 4 simultaneously widens or narrows due to such eccentric rotation.
By the operation of the center adjustment mechanism 12, the rotation amount and rotation direction of the pair of roller holder gear wheels 16 and the rotation amount of the pair of guide roller gear wheels 17 according to the rotation speed and rotation direction of the center pinion 14 and The rotation direction is adjusted, thereby adjusting the distance between the roller holders 2 and the nose 7, and adjusting the distance between the cores D (FIG. 5) of the pair of guide rollers 4 and the surface of the entry guide 9.

Next, the usage will be described.
Before the billet S (FIG. 5) is guided, the center distance D of the guide roller 4 is adjusted in advance by the center distance adjusting mechanism 12 so as to correspond to the size R of the billet.
At the time of adjustment, the rotational speed of the hydraulic motor 13 is adjusted by the amount of hydraulic oil to be supplied, and through this adjustment, the rotational speed of the center pinion 14 is determined, and at the same time, both idle gears 15 are engaged via both idle gears 15 meshed with the center pinion. The rotational speeds of the gear wheel 16 for the pair of roller holders and the gear wheel 17 for the guide roller that are meshed with each of the gears are adjusted, and finally the distance D between the opposing roller holders and the center D of the pair of guide rollers 4 are set. Adjusted.
After the billet S starts to be guided, the rotation speed of the hydraulic motor 13 is automatically managed as the billet size R is changed, and the center D of the pair of guide rollers 4 is automatically adjusted according to the changed size billet. Then, the billet is accurately guided to the entrance side of the rolling roll 6 (FIG. 2).

According to the illustrated entrance roller guide, by providing the center adjustment mechanism 12 provided with the idle gear 15, the center D of the guide roller 4 can be optimized for the billet size change even if the main body is enlarged. Since it can be adjusted, it is possible to cope with multi-size billets without replacing the main body.
By selecting the idle gear 15 having a size corresponding to the maximum value of the billet size, it is possible to cope with various kinds of changes from a large billet size to a small size.
According to the entrance roller guide, when the billet that has exited the heating furnace is passed, the gap 11 is formed between the lower surface of the upper plate portion 1a of the guide box 1 and the roller holder 2, thereby causing a thermal effect due to high temperature. Therefore, the billet can be reliably guided even at high temperatures.

  The drive source is not limited to the hydraulic motor 13 described above.

D Center-to-center R Billet size S Billet 1 Guide box 1a Upper plate 2 Roller holder 3 Support pin 4 Guide roller 5 Roller pin 6 Rolling roll 7 Nose 9 Entry guide 11 Clearance 12 Center-to-center adjustment mechanism 13 Hydraulic motor (drive source)
14 Center pinion 15 Idle gear (Transmission gear)
16 Gear wheel for roller holder 17 Gear wheel for guide roller 18, 19

Claims (2)

An inlet roller guide arranged on the first rolling stand that passes billets immediately after leaving the heating furnace,
A guide box, and this guide box each other by attaching a fulcrum pin as the center of rotation tip of the guide boxes exit protrudes from the side, and opposed to tear Ru versus each other rollers holder, the tip end of each roller holder A pair of guide rollers disposed opposite to each other with the roller pin as a rotation center, and a center adjustment mechanism for adjusting the center between the guide rollers,
Each fulcrum pin and each roller pin are inserted into pin holes opened in the guide box and each roller holder,
The inter-center adjusting mechanism is arranged to face each other along a driving source, a center pinion to which the rotational driving force from the driving source is transmitted, and a direction intersecting the guide direction of the billet across the center pinion. A pair of transmission gears meshed with the center pinion, and a pair of gear wheels and a pair of guide rollers, which are opposed to each other along a direction intersecting the guide direction of the billet. is provided with a gear wheel of use,
The gear wheel for one roller holder and the gear wheel for the guide roller that form a pair respectively mesh with one transmission gear, and the gear wheel for the other roller holder and the gear wheel for the guide roller Meshes with the other transmission gear,
The gear wheels for the pair of roller holders are installed on top of the fulcrum pins, and the center axis of the gear wheel for the roller holders is eccentric with respect to the center axis of the fulcrum pins. Each fulcrum pin is movable around the central axis of the gear wheel for each roller holder as the gear wheel for the holder rotates.
The gear wheels for the pair of guide rollers are installed on top of the roller pins, and the center axis of the gear wheel for the guide rollers is eccentric with respect to the center axis of the roller pins. Each roller pin can move around the center axis of the gear wheel for each guide roller as the gear wheel for the roller rotates.
Between the upper lower surface of the guide box and the roller holders, there is a gap for preventing contact with each other due to thermal expansion,
The inlet roller guide, wherein the pair of gear wheels for the roller holder are respectively disposed opposite to the pair of guide roller gear wheels along the guide direction of the billet. A nose is attached to the tip of each roller holder, an entry guide with a rear end protruding from the entry side of the guide box is arranged between the roller holders, and the transmission gear is an idle gear. The entrance roller guide according to claim 1 , wherein a gap for preventing contact due to thermal expansion is opened between the lower surface of the upper plate portion of the guide box and the roller holder.

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