JP5904003B2 - Chock liner changing device, chock liner and chock liner changing method - Google Patents

Description

  The present invention relates to a chock liner replacement device, a chock liner, and a chock liner replacement method for exchanging a chock liner attached to a roll chock main body in order to adjust a gap between a stand frame base of a thick plate rolling mill and a roll chock main body.

  In a rolling mill that rolls steel sheets hot or cold, a slight gap is provided between a roll chock that supports the rolling roll and a stand frame base (may be referred to as a housing) of the rolling mill. ing.

  The gap between the roll chock and the stand frame of the rolling mill (hereinafter referred to as “gap”) is provided to facilitate the roll exchanging work. In the rolling work, the relative positional relationship between the work roll and the backup roll is provided. In order to cause the sheet to be bent (camber) in the material to be rolled and to reduce the plate thickness accuracy of the material to be rolled, it is managed so as to be within a specific dimension.

  In addition, a roll chock clamping device that presses the roll chock against the rolling mill housing during rolling to prevent the roll chock from moving has also been proposed (for example, Patent Documents 1 to 3).

  Patent Document 1 relates to a rolling mill and a rolling method. In the rolling mill provided with a movable frame between a roll chock and a rolling mill housing, and provided with a first hydraulic device for performing roll balance and the like on the movable frame, It has been proposed to further provide a second hydraulic device that presses and restrains the roll chock and the movable frame in the flow direction of the rolling material, and a third hydraulic device that presses and restrains the movable frame in the vertical direction.

  The second hydraulic device reduces the tilt of the roll during rolling and enables stable rolling with less meandering of the rolled material. The third hydraulic device resonates the rolling mill with the cylindrical roller of the roll shaft rolling bearing. It is possible to obtain a rolled material having no indentation.

  Patent Document 2 relates to a rolling mill and a rolling method that suppress the rattling of the rolling roll in the axial direction and the sheet passing direction, and a power clamp device that restrains a roll chock that pivotally supports the rolling roll is provided in the housing. Using a rolling mill that engages the housing and the roll chock, and suppresses shakiness in the axial direction and the sheet passing direction of the rolling roll, and the rolling mill, the power clamp device is driven at a low pressure during the steady operation of the rolling mill, We have proposed a rolling method that is driven at high pressure during biting and butt penetration.

  Patent Document 3 relates to a roll chock clamp device, and a plurality of hydraulic cylinders are arranged on the housing side corresponding to the end of the roll chock, and each cylinder stops pressing in such a degree that its piston comes into contact with the roll chock. To minimize the impact on the AGC device. Also, it is proposed that all cylinders can come into contact with the roll chock when an unbalanced load is generated by sharing the flow paths of the cylinders.

JP 2002-143912 A JP 2001-198609 A Japanese Patent No. 3622638

  As a method of managing the gap so as to have a constant dimension, as shown in FIG. 5, a portion where a gap is formed between the roll chock main body 7 and the stand outer frame (not shown) (portions before and after the work roll shaft 10). There is a method in which a chock liner (which may be described as a liner) 6 having a predetermined thickness t is detachably attached with a bolt 9.

  In this case, the roll chock immediately after the chock liner 6 is attached has a width that allows a predetermined gap to be obtained with the stand outer frame (not shown). However, as shown in FIG. As the length increases, the width becomes narrower and the gap becomes larger. As a result, the camber and the plate thickness fluctuate, and the yield decreases.

  Therefore, it is necessary to replace the chock liner regularly, but even if the bolt 9 that attaches the chock liner to the roll chock main body is removed, the chock liner is crimped to the roll chock main body and firmly fixed, so it cannot be removed easily. It took a long time.

  In addition, the replacement of the chock liner was once a year, but in order to improve the yield, it is necessary to replace the chock liner in a shorter period and the frequency of the replacement work is increased. It is requested.

  Then, an object of this invention is to provide the chock liner replacement | exchange apparatus and replacement | exchange method with which removal of the chock liner from a roll chock main body is easy, and a chock liner used for this.

The object of the present invention can be achieved by the following means.
1. A chock liner exchanging device for removing a chock liner fixed to a roll chock from a roll chock main body, comprising a gantry bolted to the chock liner at the time of exchanging work, and a hydraulic jack attached to the gantry, the gantry and the The chock liner changing device is characterized in that the hydraulic jack extends so that the tip of the hydraulic jack can directly press the roll chock main body.
2. The gantry includes a back member that is a base end side of the hydraulic jack, a front member that is parallel to the back member, and a connecting member that connects the back member and the front member. A holding portion for detachably holding a hydraulic jack at the center of the back member; the front member has a bolt hole for bolting the chock liner and the front member; and the front member is the back member 2. The chock liner replacement device according to claim 1, wherein when the hydraulic jack held at the center of the member is extended, a tip portion of the hydraulic jack is configured so as not to interfere with the front member. .
3. The front member is composed of a substantially annular plate having an inner diameter through which at least the tip of the hydraulic jack is inserted, or a plurality of members obtained by dividing the substantially annular plate, the substantially annular plate, or 3. The chock liner replacement device according to claim 2, wherein a plurality of members obtained by dividing the substantially annular plate are coupled to the back member by the connecting member.
4). A chock liner replacement method in which a chock liner fixed to a roll chock is removed from a roll chock main body, wherein a base is bolted to the chock liner, and a hydraulic jack attached to the base is extended to extend the tip of the hydraulic jack. The chock liner replacement method, wherein the chock liner is removed from the roll chock main body by direct pressing.
5. The gantry includes a back member that is a base end side of the hydraulic jack, a front member that is parallel to the back member, and a connecting member that connects the back member and the front member. A holding portion for detachably holding a hydraulic jack at the center of the back member; the front member has a bolt hole for bolting the chock liner and the front member; and the front member is the back member 5. The chock liner replacement method according to claim 4, wherein when the hydraulic jack held at the center of the member is extended, a tip portion of the hydraulic jack is configured so as not to interfere with the front member. .
6). The front member is composed of a substantially annular plate having an inner diameter through which at least the tip of the hydraulic jack is inserted, or a plurality of members obtained by dividing the substantially annular plate, the substantially annular plate, or 6. The chock liner replacement method according to claim 5, wherein the plurality of members obtained by dividing the substantially annular plate are coupled to the back member by the connecting member.
7). A chock liner having a bolt hole for attachment to the roll chock main body, a bolt hole for attachment to the chock liner exchange device, and a hole facing a recess provided in the roll chock main body.

  According to the present invention, the chock liner replacement operation can be performed easily and in a short time. Therefore, it is possible to improve the plate thickness accuracy of the product by shortening the chock liner replacement cycle without stopping the line for a large amount of time for the chock liner replacement work, and the work safety is also increased. It is extremely useful.

It is a figure explaining the structure of the chock liner exchange apparatus which concerns on this invention, (a) is a front view, (b) is a side view. It is a figure which shows an example of the chock liner which concerns on this invention, (a) is a front view, (b) is a side view. The figure explaining the condition which attached the chock liner exchange apparatus shown in FIG. 1 to the roll chock main body. The figure which shows the time-dependent change of the width | variety of the roll chock which attached the chock liner. The figure which shows the chock liner attachment condition to the roll chock main body.

  The chock liner exchanging device according to the present invention is intended for a chock liner in which a portion covering a concave portion (a concave portion 8 of the roll chock main body 7 shown in FIG. 5) for a transportation jig provided in the roll chock main body is cut out. And Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram for explaining the configuration of a chock liner replacement device according to an embodiment of the present invention, where (a) is a front view seen from a roll chock body (not shown), and (b) is a roll chock body (not shown). The side view in the case of joining to the left side is shown.

  In these drawings, 1 is a stand, 1a is a front member, 1b is a back member, 1c is a connecting member for connecting the front member 1a and the back member 1b, 2a is a hydraulic jack, 2b is a tip of the hydraulic jack 2a, When carrying the chock liner changing device with a crane, eyebolts for attaching hooks and wires, 4a and 4b are holding members for detachably holding the hydraulic jack 2a to the back member 1b, 5 is a hydraulic hose for the hydraulic jack 2a, a is A through hole through which a bolt is inserted is shown.

  The chock liner exchanging device has a gantry 1 that is bolted to a chock liner (not shown) during exchanging work, and a hydraulic jack 2a.

  The gantry 1 includes a rear member 1b that is a base end side of the hydraulic jack 2a, a front member 1a that is parallel to the rear member 1b, and a connecting member 1c that connects the rear member 1b and the front member 1a. The connecting member 1c, the back member 1b, and the front member 1a are joined by welding or the like.

  The attachment position of the connecting member 1c to the rear member 1b and the front member 1a is such that the hydraulic hose 5 can be easily attached to and detached from the hydraulic jack 2a, and the work when the bolt is coupled to the chock liner (not shown) is easy. As described above, it is preferable to appropriately set the interval between the adjacent connecting members 1c. When the chock liner replacement device is transported by a crane, eyebolts 3 to which hooks and wires are attached are attached to the connecting member 1c at appropriate positions and numbers. The eyebolt 3 may be attached to the front member 1a or the back member 1b.

  The back member 1b is made of a single plate, for example, a disc, and is provided with a holding portion that detachably holds the hydraulic jack 2a. Here, as an example of the holding portion, holding members 4a and 4b for detachably holding the hydraulic jack 2a are attached in advance. The holding members 4a and 4b are attached so that the center of the back member 1b (for example, the center of the disk) and the axial center of the hydraulic jack 2a are aligned, and the hydraulic jack 2a is upright with respect to the back member 1b.

  The front member 1a has a shape obtained by dividing an annular plate. In the gantry 1, a plurality of front members 1a are provided at intervals, and each is joined to the back member 1b via a connecting member 1c.

  The dimensions of the front member 1a and the joining position where the back member 1b is attached to the front member 1a via the connecting member 1c are substantially circular inside formed by connecting the inner peripheral portions of the plurality of front members 1a, and the tip of the hydraulic jack 2a. It determines suitably so that it may become the magnitude | size which the part 2b penetrates. The front member 1a is provided with a plurality of through holes a for bolting the gantry 1 to a chock liner of a roll chock main body (not shown).

  FIGS. 2A and 2B are diagrams illustrating a configuration of a chock liner according to an embodiment of the present invention, where FIG. 2A is a front view, and FIG. 2B is a side view when a roll chock body (not shown) is coupled to the right side. Show. In the figure, 6 is a chock liner, 14 is a through-hole facing the recess 8 of the roll chock body 7, and 13 is a plurality of bolt holes (female thread portions are machined) for bolting the gantry 1 (not shown) to the chock liner 6. , 12 is a plurality of through holes for bolting the chock liner 6 to the roll chock main body 7 (not shown). By providing the through-hole 14 facing the recess 8 of the roll chock body 7, when the chock liner 6 is attached to the roll chock body 7, the recess 8 for the transportation jig provided in the roll chock body 7 is It will be exposed through the through hole 14 of the chock liner 6. The chock liner 6 can be installed and fixed to the roll chock main body 7 by passing the bolt 9 (not shown) through the bolt hole 13 and fastening it to the roll chock main body 7 (not shown).

  FIG. 3 is a view showing a state in which the chock liner changing device shown in FIG. 1 is attached to the chock liner 6 fixed to the roll chock main body 7 (the eye bolt 3, the bolt hole 12 of the chock liner 6 and the chock liner 6). The bolt 9 attached to the roll chock body 7 is omitted). In FIG. 3, 6 is a chock liner, 7 is a roll chock main body, 8 is a recess of the roll chock main body 7, 9 is a bolt, and the same components as those in FIG. 1 and FIG.

  The through hole a provided in the front member 1 a and the bolt hole 13 provided in the chock liner 6 are provided so that their positions coincide when the chock liner 6 is correctly attached to the front member 1. For this reason, the chock liner 6 can be fixed to the front member 1 a of the gantry 1 using the bolts 9.

  At this time, the front member 1a is constituted by a member obtained by dividing a substantially annular plate, and the inner diameter thereof is larger than the outer diameter of the front end portion 2b of the hydraulic jack 2a, and the chock liner 6 has a concave portion 8 of the roll chock main body 7. Since the through-hole 14 is provided so that the front end 2b of the hydraulic jack 2a directly contacts the recess 8 without interfering with the front member 1a or the chock liner.

  The chock liner replacement device according to the present invention receives the reaction force when the hydraulic jack 2a attached to the gantry 1 is extended and the tip portion 2b presses the recess 8 of the roll chock body 7 with the gantry 1, and the reaction force is received. This is transmitted to the chock liner 6 connected to the front member 1a with bolts 9, and the chock liner 6 is peeled off from the roll chock body 7.

  Therefore, when the back member 1b, the front member 1a, and the connecting member 1c are configured as the gantry 1, the material, the plate thickness, and the dimensions are appropriately selected so that the rigidity capable of receiving the reaction force when pressed is secured. Select. The back member 1b and the front member 1a are parallel to each other so that the effect of pressing by the hydraulic jack 2a and the effect of transmitting the reaction force to the chock liner 6 are not impaired, and the hydraulic jack 2a is connected to the back member 1b. It is preferably attached so as to stand upright.

  An example of the assembly procedure of the chock liner replacement device according to the present invention is shown below. First, the holding members 4a and 4b are attached to the back member 1b. Next, the front member 1a and the back member 1b are welded and joined via the connecting member 1c, and then the hydraulic jack 2a from which the hydraulic hose 5 has been removed is inserted into the holding members 4a and 4b from the outside of the front member 1a, and sandwiched. The hydraulic hose 5 passed through the gap between the connecting members 1c is attached to the hydraulic jack 2a. The holding members 4a and 4b can be made of hard rubber.

  Note that, for example, the front member 1a is formed of a substantially annular plate or a plurality of members obtained by dividing the substantially annular plate, and the inside size of the substantially annular shape is sufficiently large and held. When the members 4a and 4b can be inserted while holding the hydraulic jack 2a, the holding members 4a and 4b are not attached to the rear member 1b in advance, but are attached to the base end side of the hydraulic jack 2a. It is also possible to insert the hydraulic jack 2a with the holding members 4a and 4b attached to the base end side from the outer side of the front member 1a and attach it to the rear member 1b.

  Further, for example, the front member 1a is constituted by a substantially annular plate or a plurality of members obtained by dividing the substantially annular plate, and the size of the inside of the substantially annular shape is only the tip portion 2b. If the holding member 4a, 4b is attached to the back member 1b and the hydraulic jack 2a is clamped, the front member 1a and the back member 1b may be joined via the connecting member 1c.

  When removing the chock liner 6, first, the bolt 9 for attaching the chock liner 6 to the roll chock main body 7 is removed. Subsequently, the gantry 1 is brought close to the chock liner 6 so that the front member 1a faces the roll chock body 7 to which the chock liner 6 is attached. Furthermore, while adjusting the position so that the through hole a provided in the front member 1a and the bolt hole 13 provided in the chock liner 6 face each other, the front member 1a and the chock liner 6 are brought into contact with each other, The front member 1a and the chock liner 6 are bolted through the bolt 9 through the through hole a of the front member 1a. Next, when the hydraulic jack 2a is operated to extend the tip portion 2b, the tip portion 2b is brought into direct contact with the recess 8 of the roll chock body 7, and when the tip 2b continues to press the recess 8 of the roll chock body 7, The front end portion 2b receives the reaction force, and further receives the reaction force at the front member 1a via the hydraulic jack 2a, the rear member 1b, and the connecting member 1c. Thereby, the chock liner 6 bolted to the front member 1 a can be peeled from the roll chock main body 7.

  In this operation, the gantry 1 can be suspended by a crane via the eyebolt 3.

DESCRIPTION OF SYMBOLS 1 Base 1a Front member 1b Back member 1c Connection member 2a Hydraulic jack 2b Tip part 3 Eye bolt 4a, 4b Holding member 5 Hydraulic hose 6 Chock liner 7 Roll chock body 8 Recess 9 Bolt 10 Work roll axis a, 12, 14 Through-hole 13 Bolt Hole

Claims (5)

A chock liner replacement device that removes a chock liner fixed to a roll chock from the roll chock body, and includes a mount that is bolted to the chock liner during replacement work, and a hydraulic jack attached to the mount.
The gantry includes a back member that is a base end side of the hydraulic jack, a front member that is parallel to the back member, and a connecting member that connects the back member and the front member. A holding portion for detachably holding a hydraulic jack at the center of the back member; the front member has a bolt hole for bolting the chock liner and the front member; and the front member is the back member When the hydraulic jack held at the center of the member is extended, the tip of the hydraulic jack is shaped so as not to interfere with the front member.
A chock liner replacement device characterized in that the hydraulic jack extends and the tip of the hydraulic jack can directly press the roll chock body. The front member is composed of a substantially annular plate having an inner diameter through which at least the tip of the hydraulic jack is inserted, or a plurality of members obtained by dividing the substantially annular plate, the substantially annular plate, or a plurality of members chock liner exchange apparatus according to claim 1, characterized in that it is coupled to the rear member by the connecting member obtained by dividing the the symbolic annular sheet. Using a chock liner exchanging apparatus having a gantry and a hydraulic jack attached to the gantry, a chock liner exchanging method for removing the chock liner fixed to the roll chock from the roll chock body,
The gantry includes a back member that is a base end side of the hydraulic jack, a front member that is parallel to the back member, and a connecting member that connects the back member and the front member. A holding portion for detachably holding a hydraulic jack at the center of the back member; the front member has a bolt hole for bolting the chock liner and the front member; and the front member is the back member When the hydraulic jack held at the center of the member is extended, the tip of the hydraulic jack is configured so as not to interfere with the front member,
The chock liner frame was bolted to, by the leading end portion of the hydraulic jack by extending the hydraulic jack attached to the frame presses directly the roll chock body, characterized in that removing the chocks liner from the roll chock body A chock liner replacement method. The front member is composed of a substantially annular plate having an inner diameter through which at least the tip of the hydraulic jack is inserted, or a plurality of members obtained by dividing the substantially annular plate, the substantially annular plate, or 4. The chock liner replacement method according to claim 3 , wherein the plurality of members obtained by dividing the substantially annular plate are coupled to the back member by the connecting member.   A chock liner having a bolt hole for attachment to the roll chock main body, a bolt hole for attachment to the chock liner exchange device, and a hole facing a recess provided in the roll chock main body.

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