JPS6350002Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a universal rolling mill.

In conventional universal rolling mills, when changing rolls, an open yoke provided on one side of the rolling mill body is rotated in the horizontal direction to open one side of the rolling mill body, and the rolls are removed from the open part. The rolls are being pulled out, but this requires a space on the side of the rolling mill body to allow the open yoke to rotate, and that space is wasted except when the open yoke is rotating. In addition, the moving distance of the roll exchange trolley becomes longer, and the installation area of the entire apparatus becomes larger. Furthermore, since the direction of rotation of the open yoke coincides with the direction of the rolling reaction force that the open yoke receives, a strong fixing means is required to fix the open yoke to the rolling mill body.

Therefore, the present invention provides a universal rolling mill that solves this problem.The feature of this invention is that the open yoke for supporting rolls provided on one side of the rolling mill body can be rotated around a horizontal axis. This is due to the fact that it can be configured freely, and according to such a configuration,
When changing rolls, the open yoke is rotated upward or downward to open one side of the rolling mill main body and the roll is pulled out. Therefore, there is no space on the side of the rolling mill main body for rotating the open yoke as in the past. do not need. Therefore, the moving distance of the roll exchanging trolley is shortened, and the installation area of the entire device may be small. Further, since the rotational direction of the open yoke and the direction of the rolling reaction force that the open yoke receives are perpendicular to each other and do not coincide with each other, a strong fixing means for fixing the open yoke to the rolling mill body is not required. Furthermore, the mechanical strength of the open yoke itself can be made sufficiently large and thick, thereby improving the rigidity of the rolling mill.

Hereinafter, one embodiment of the present invention will be described based on the drawings. Reference numeral 1 denotes a mill housing disposed on a fixed base 2, which has a passage space 3 in the center that allows the H-beam to pass through, and housing side parts 1A and 1B on both sides of the space 3 are provided with rolls. A space 4 for use is formed. 5 is an open yoke whose base end is rotatably supported in the directions of arrows A and B on a horizontal shaft 6 screwed to one side edge of one housing side portion 1A;
A U-shaped groove 7 formed on the lower surface of the tip is connected to a stopper shaft 8 screwed to the other side edge of one housing side 1A.
is engaged with. 9 is a hydraulic nut,
A nut body 9A fixed to the tips of the stopper shaft 8 and the horizontal shaft 6, and the stopper shaft 8 and the horizontal shaft 6
It is slidably disposed at the tip of the nut body 9A, and when it receives pressure oil, it moves away from the nut body 9A, that is, the direction in which it comes into pressure contact with the open yoke 5 (arrow C
direction). 10 is a fixed frame provided on the other housing side 1B, and 11 is a vertical roll, which is rotatably attached to a vertical roll yoke 12 disposed on each housing side 1A, 1B so as to be movable in the directions of arrows D and E. Supported. 13 is a roll balance cylinder whose main body is fixed to the yoke 5 and the fixed frame 10 and whose piston rod tip is connected to each vertical roll yoke 12; 14 is a pair of vertical roll lowering devices arranged on the yoke 5 and the fixed frame 10; Each vertical roll yoke 12 is rolled down toward the pass line P by rotating the screw shaft 15 in the forward and reverse directions by a geared motor 16. 17 is a yoke opening/closing cylinder whose main body is connected with a pin 18 to the bracket of the fixed base 2, and whose piston rod tip is connected with a pin 20 to the tip of a lever 19 protruding from the base end of the open yoke 5; 21 is a pair of horizontal rolls; Each of the rollers is rotatably supported by a horizontal roll chock 22 which is disposed on the mill housing 1 so as to be movable up and down. 23 is a horizontal roll lowering device whose main body is fixed to the top plate and bottom plate of the mill housing 1, and whose piston rod tips are connected to each horizontal roll chock 22; 24 is a horizontal roll lowering device arranged on the lower surface of the lower horizontal roll chock 22; The wheels 25 are provided on the mill housing 1 below the wheels 24, and the rails 26 are for fixing the mill housing, and are formed at the tip of the piston rod of the clamping cylinder 27.

The procedure for exchanging rolls will be explained based on the above configuration. First, the connection between the piston rod tip of the roll balance cylinder 13 and the vertical roll chock 12 is released, and the connection between the vertical roll lowering device 14 and the vertical roll chock 12 is also released. Next, drain the pressure oil from the hydraulic nut 9, and open the pressing body 9B to open the yoke 5.
Release the pressure on the Next, the piston rod of the yoke opening/closing cylinder 17 is reduced. Then, the open yoke 5 rotates in the direction of arrow B about the horizontal shaft 6 via the lever 19, resulting in the state shown by the imaginary line in FIG. In addition, the upper horizontal roll lowering device 23 and the upper horizontal roll chock 22
Release the connection with the lower roll lowering device 23.
Reduce the size of the piston rod. The wheels 24 are thereby placed on the rails 25. Next, the vertical roll 11 and the horizontal roll 2 are replaced by a roll exchange cart.
1 can be pulled out of the mill housing 1 from the roll space 4 of one housing side 1A.

When inserting new rolls 11, 21 into the housing 1, the procedure described above may be reversed.

As described above, according to the present invention, when replacing rolls, the open yoke is rotated upward or downward to open one side of the rolling mill body and pull out the rolls. Does not require space for open yoke rotation as in the case of the open yoke. Therefore, the moving distance of the roll exchanging trolley is shortened, and the installation area of the entire device may be small. Further, since the rotational direction of the open yoke and the direction of the rolling reaction force that the open yoke receives are perpendicular to each other and do not coincide with each other, a strong fixing means for fixing the open yoke to the rolling mill body is not required. Furthermore, the mechanical strength of the open yoke itself can be made sufficiently large and thick, thereby improving the rigidity of the rolling mill.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, with FIG. 1 being a partially cutaway side view and FIG. 2 being a partially cutaway plan view. 1... Mill housing (rolling machine body), 5...
Open yoke, 6...Horizontal shaft, 7...U-shaped groove,
8...Stopper axis, 11...Vertical roll, 17...
Yoke opening/closing cylinder, 21...Horizontal roll.

Claims (1)

[Scope of utility model registration request] A universal rolling mill characterized in that an open yoke for supporting rolls provided on one side of the rolling mill body is configured to be rotatable around a horizontal axis.