JP4514878B2 - Roll cradle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roll cradle having a mechanism for clamping chock attached to both ends of a roll to be ground during grinding in a roll grinder.
[0002]
[Prior art]
In a roll grinding machine, a pair of cradles are used to support a roll to be ground between a headstock and a tailstock. The roll is ground while being supported at both ends by the cradle.
[0003]
FIG. 4 shows an example of this type of cradle. 1 is a roll, and 2 is a land portion provided on both shoulders of the roll. The cradle 3 has a cradle 5 attached to a cradle body 4 for receiving the land portion 2. One such cradle 3 is arranged on each of the headstock side and the tailstock side.
[0004]
In a roll grinding machine, grinding may be performed while a chock 7 which is a kind of bearing is attached to the roll 1. Examples of the roll 1 with chock include a hot rolling roll, a cold rolling roll, an aluminum roll, a papermaking roll, and the like.
[0005]
While the roll is being ground, the chock 7 needs to be supported and fixed to prevent rotation. For this reason, in the roll 1 with the chock 7, the chock cradle 8 is used together with the roll cradle 4, or depending on the type of the roll 1, the chock 7 is fixed only by the chock cradle 8. The roll 1 is supported.
[0006]
As shown in FIG. 5, the chock 7 has a box shape that is wider than the outer diameter of the roll 1. Since the chock 7 is a kind of bearing, it can rotate around the roll axis. The cradle 8 clamps the chock 7 from above, below, left, and right, and is firmly fixed so that the chock 7 does not rotate during grinding.
[0007]
[Problems to be solved by the invention]
However, when clamping the chock 7, in the conventional chock cradle 8, a plurality of clamping mechanisms are operated independently, and the chock 7 moves when trying to clamp one place. It took time to position and adjust the chock 7 until it was completely clamped.
[0008]
Further, when the type of roll changes, the size of the chock changes accordingly, and the scroll of the clamp mechanism must be adjusted each time.
[0009]
Accordingly, an object of the present invention is to provide a roll cradle that can solve the above-described problems of the prior art and can clamp the chock in a general-purpose and quick manner regardless of the type and size of the chock. is there.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a roll pedestal that supports a roll with a chock between the headstock and the tailstock in the roll grinder with the chocks at both ends thereof, and is provided at both ends of the roll. A vertical side surface of the housing of each of the selected chocks is used as a reference surface, and a pair of first clamp portions for positioning the housing in contact with the reference surface for each chock, and a first clamp portion for each chock And a pair of second clamp portions that press the surface opposite to the reference surface of the chock, and the pair of first clamp portions is synchronized with each chock and advanced at the same speed. A clamp driving unit is provided.
[0011]
According to the present invention, since the pair of first clamp parts move forward at the same speed synchronously with the vertical clamp reference plane of the housing of the chock, the positioning of the housing is completed at the time of contact with the clamp reference plane. Efficient clamping is possible. In addition, since the pair of first clamp portions move forward at the same speed synchronously, they are in contact at the same time regardless of the size and type of the chock housing, so that they are universally applied regardless of the type of roll to be ground. It becomes possible.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a roll cradle according to the present invention will be described with reference to the accompanying drawings.
[0013]
1 and 2 show a roll cradle according to the present embodiment. In this roll cradle 10, a pair of cradle 10 having the same configuration is arranged on a tailstock side and a headstock side of a grinder (not shown), and a chock 7 attached to both ends of the roll 1 is provided. To support.
[0014]
A base 12 is placed on the bed 11, and a column 13 is erected on the base 12. The column 13 incorporates a first clamping device to be described later, and a pair of first upper clamping portion 14a and first lower clamping portion 14b included in the first clamping device are provided from the side of the column 13. It protrudes horizontally. Reference numeral 15 denotes a motor of a clamp drive unit that drives the upper and lower first clamp units 14a and 14b. A second lower clamp device 16 is disposed at a position slightly away from the column 13, and a second upper clamp device 17 is disposed above the column 13.
[0015]
As shown in FIG. 1, the chock 7 supports the roll 1 in a rotatable manner. The widest side surface of the housing 20 of the chock 7 is a clamp reference surface, and the first upper clamp portion 14a and the first lower clamp portion 14b of the first clamp device are in contact with the clamp reference surface 21. This is pressed.
[0016]
The second lower clamp device 16 is positioned so as to face the first lower clamp portion 14b, the second lower clamp portion 22 that advances and retreats on the same axis as the first lower clamp portion 14b, and the push-up shaft for pushing up the chock 7 24. The second lower clamp device 16 incorporates an actuator such as a cylinder that drives the second lower clamp portion 22 and the push-up shaft 24.
[0017]
The second upper clamp device 17 is disposed so as to face the first upper clamp portion 14a, and includes a second upper clamp portion 23 that advances and retreats coaxially with the first upper clamp portion 14a. The second upper clamp portion 23 can be driven by an actuator such as.
[0018]
FIG. 3 is a cross-sectional view of the column 13 and shows the drive mechanism of the first clamping device. The drive shaft 30 of the drive motor 15 is connected to a screw shaft 31 that is rotatably supported horizontally through a bearing 36, and a ball nut 32 is screwed to the screw shaft 31. The ball nut 32 is fixed to one end portion of a hollow plunger 33, and the first lower clamp portion 14 b is coaxially connected to the other end portion of the plunger 33. The plunger 33 is slidably fitted to a sleeve 34 that is horizontally fixed to the column 13. A pusher 35 that presses the clamp reference surface 21 of the chock 7 is attached to the tip of the lower clamp portion 14b.
[0019]
A bevel gear 37 is attached to the end of the screw shaft 31 on the connection side with the drive motor 15. Reference numeral 40 is a transmission rod that transmits the drive torque of the drive motor 15 to the first upper clamp 14b side. The transmission rod 40 is supported in a direction perpendicular to the axial direction of the screw shaft 31 via bearings 41a and 41b, and bevel gears 42 and 43 are attached to both ends. Among these, the bevel gear 42 meshes with the bevel gear 37 connected to the screw shaft 31.
[0020]
The mechanism for driving the first upper clamp portion 14a uses a screw shaft 44 and a ball nut 45, similarly to the first lower clamp portion 14b. The screw shaft 44 is rotatably supported by a bearing 46 in parallel with the screw shaft 31, and a bevel gear 50 that meshes with the bevel gear 43 is attached to one end portion of the screw shaft 44. A ball nut 45 screwed to the other end portion of the screw shaft 44 is fixed to one end portion of a hollow plunger 47, and the first upper clamp portion 14 a is coaxial with the other end portion of the plunger 47. It is connected. The plunger 47 is slidably fitted to a sleeve 48 that is fixed horizontally at the top of the column 13. A pusher 35 for pressing the clamp reference surface 21 of the chock 7 is attached to the tip of the first upper clamp portion 14a.
[0021]
The bevel gears 37, 42, 43, and 50 described above are gears having the same pitch circle and the same number of teeth. Further, the screw shaft 31 and the screw shaft 44 are oppositely threaded, so that the first upper clamp portion 14a and the first lower clamp portion 14b move forward and backward in synchronization with each other at the same speed. It is like that.
[0022]
Reference numeral 51 denotes a clamp detection mechanism for detecting that the clamps 35 of the first upper clamp portion 14a and the first lower clamp portion 14b are in contact with the clamp reference surface 21.
[0023]
The roll cradle according to the present embodiment is configured as described above. Next, the operation and effect will be described.
[0024]
In FIG. 1, when the roll 1 with the chock 7 is carried into the grinding machine, the chock 7 is turned so that the clamp reference surface 21 of the housing 20 is vertical.
[0025]
Next, when the drive motor 15 is activated, the first upper clamp portion 14 a and the first lower clamp portion 14 b start moving toward the clamp reference surface 21 of the chock 7. As shown in FIG. 3, the rotation of the drive motor 15 is directly transmitted to the screw shaft 31, and is transmitted to the screw shaft 44 from the bevel gears 37 and 42 and the transmission shaft 40 via the bevel gears 43 and 50. In this case, the screw shaft 31 and the screw shaft 44 rotate at the same synchronized number of rotations, but the directions of rotation are opposite to each other. The first upper clamp portion 14a and the first lower clamp portion 14b can be advanced at the same speed while sliding the sleeves 34 and 48.
[0026]
The clamps 35 at the tips of the first upper clamp portion 14a and the first lower clamp portion 14b detect that the other side is in contact with the clamp reference surface 21 of the chock 7 by the clamp detection mechanism 51, and the chock 7 is positioned. When complete, the drive motor 15 is stopped. Next, in FIG. 1, the second lower clamp device 16 and the second upper clamp device 17 are operated, and the second lower clamp portion 22 and the second upper clamp portion 23 press the surface opposite to the clamp reference surface 21, respectively. . Accordingly, the upper portion of the housing 21 of the chock 7 is clamped by the cooperation of the first upper clamp portion 14 a and the second upper clamp portion 23, and the lower portion thereof is clamped by the first lower clamp portion 14 b and the second lower clamp portion 22. It is clamped by cooperation.
[0027]
As described above, according to the present embodiment, the pair of first upper clamp portion 14a and first lower clamp portion 14b move forward at the same speed in synchronization with the clamp reference surface 21 of the chock housing 20, so that the clamp reference surface Since the positioning of the chock housing 20 is completed at the time when it abuts against 21, it is possible to perform efficient and quick clamping. In addition, since the first upper clamp portion 14a and the first lower clamp portion 14b advance at the same speed synchronously, they always contact at the same time regardless of the size and type of the chock housing 20, so that the roll to be ground It becomes possible to apply it universally regardless of the type.
[0028]
【The invention's effect】
As apparent from the above description, according to the present invention, as a reference surface a vertical one side of the housing of the respective chocks provided at both ends of the roll, contact with the to the reference plane for each chock A pair of first clamp portions for positioning the housing, and a pair of second clamp portions that are arranged to face the first clamp portion for each of the chocks and press the surface opposite to the reference surface of the chocks. Since each of the chocks has a clamp drive unit that synchronizes the pair of first clamp portions to advance at the same speed, the chocks can be clamped universally and quickly regardless of the type and size of the chocks. can do.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a roll cradle of the present invention.
FIG. 2 is a front view showing a set of roll cradle according to the present invention.
FIG. 3 is a cross-sectional view showing a clamp driving unit provided in a column of the roll cradle of FIG.
FIG. 4 is an explanatory diagram of a conventional roll cradle.
FIG. 5 is an explanatory diagram of a roll with a chock.
[Explanation of symbols]
1 roll 7 chock 10 roll cradle 11 bed 12 base 13 column 14a first upper clamp portion 14b first lower clamp portion 15 drive motor 16 second lower clamp device 17 second upper clamp device 20 housing 21 clamp reference surface 22 second Lower clamp portion 23 Second upper clamp portion 24 Push-up shaft 31 Screw shaft 37 Bevel gear 40 Transmission shaft 42 Bevel gear 43 Bevel gear 44 Screw shaft 50 Bevel gear 51 Clamp detection mechanism

Claims (1)

In a roll grinder, a roll cradle that supports a roll with a chock between the headstock and the tailstock with a chock at both ends thereof,
As a reference surface a vertical one side of the housing of the respective chocks provided at both ends of the roll, and the first clamping portion of the pair of positioning the housing abuts on the reference surface for each chock,
A pair of second clamp portions that are arranged to face the first clamp portion for each of the chocks and press the surface on the opposite side of the reference surface of the chock,
A roll cradle comprising a clamp drive unit that moves the pair of first clamp units synchronously forward at the same speed for each chock.

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