JPH0829346B2 - Straightening roll angle adjustment device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for straightening a material to be processed having a straight line, a bend, or the like, which allows remote control of the angle adjustment of a straightening roll and further straightening. The present invention relates to an angle adjusting device that can effectively prevent an angle change after positioning a roll.

Prior art For example, a work material such as a round bar or a steel pipe is provided with a desired dimension,
As a device for correcting a line curl or a bend generated when processing into a round bar or a steel pipe having a shape and mechanical properties, a straightening device using a drum-shaped straightening roll is preferably used. As shown in FIG. 6, this roll straightening device is provided with a plurality of straightening rolls 12, 12 which are vertically opposed to each other and sandwich a pass line PL of a material 10 to be processed and which are arranged along the pass line PL. A roll type is known. In addition,
The pair of straightening rolls 12 and 12 are positioned so as to intersect the pass line PL with being inclined at a predetermined angle in mutually opposite directions. Further, the straightening roll 12 is configured so that the inclination angle with respect to the pass line PL can be arbitrarily changed to change the shape of the hole (the portion through which the material 10 passes) formed between the both rolls 12, 12.

For example, the straightening roll 12 is rotatably supported by a housing, and the housing is rotatably supported by a shaft (perpendicular to the rotation axis of the straightening roll 12) arranged in the apparatus base frame. A screw shaft rotatably arranged on the base frame is connected to the housing, and the angle of the straightening roll 12 is changed by rotating the screw shaft to rotate the housing with respect to the base frame. Adjustments are made.

When the material 10 to be processed is fed to the straightening device configured as described above, the material 10 passing through the hole formed between the straightening rolls 12 and 12 facing each other in the vertical direction has a linear stroke of the material 10. A larger deformation than that of canceling out bends etc. is given,
Finally a straight material is obtained.

Problems to be Solved by the Invention In order to straighten a material to be processed with high accuracy, it is most preferable that the material passing through a hole formed between a pair of straightening rolls and the contact state between both rolls are good. It is important and it is necessary to adjust the shape of the hole according to the wire diameter of the material. Therefore, in the straightening device, it is necessary to adjust the inclination angle of each straightening roll with respect to the pass line every time the order is changed. However, this adjustment work requires a great deal of labor and time because it relies almost on human hands, and since it requires experience to make appropriate adjustments for each material, it depends on the degree of skill of the operator. There was a drawback that the correction accuracy fluctuated.

Moreover, since the housing is configured to be rotatable with respect to the base frame, a gap is inevitably formed between the base frame and the housing. For this reason, there is a drawback that the housing is loosened during the straightening of the material to be processed and the inclination angle of the straightening roll is changed, which makes it impossible to carry out straightening with high precision.

OBJECT OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned drawbacks inherent in the work of adjusting the angle of the straightening roll, and it is possible to easily and quickly adjust the angle of the straightening roll. The purpose is to provide means.

Means for Solving the Problem In order to overcome the above problems and preferably achieve the intended purpose, the present invention includes a pair of straightening rolls that are arranged to face each other with a pass line of a material to be processed interposed therebetween, and the straightening roll is In a straightening device configured to adjust a tilt angle with respect to a pass line and straightening by applying a required stress to a material passing between both rolls, the straightening roll is rotatably supported, and a rotation axis of the roll is provided. A rotary table that is rotatably supported by a support shaft that is disposed on the base frame so as to intersect, and a slide table that is slidably disposed on the base frame and that engages with a step portion formed on the rotary table and that has an axial direction. A drive rod that is screwed into a screw hole formed in a worm wheel that is rotatably driven in a state in which movement of the worm wheel is restricted, and that moves forward and backward in a position eccentric from the support shaft as the worm wheel rotates; It comprises a rack that meshes with a sector gear arranged on the rotary table and moves forward and backward by a fluid pressure cylinder arranged on the base frame, and a forward movement of the drive rod on the bottom side of the fluid pressure cylinder. The low pressure circuit that allows the rack to retract as the rotary table rotates due to the rotation of the rotary table, and the stepped portion of the rotary table to the drive rod under the meshing action with the sector gear by urging the rack in the forward direction. It is characterized in that it is configured to be switchably connected to a high-voltage circuit that engages with the table and positions and fixes the table.

Further, another invention of the present application is provided with a pair of straightening rolls that are arranged to face each other with a pass line of a material to be processed interposed therebetween, and the straightening roll is configured so that an inclination angle with respect to the pass line can be adjusted, and a material passing between both rolls. In a straightening device for straightening by applying a required stress to the straightening roll, the straightening roll is rotatably supported, and is rotatably supported by a support shaft arranged on a base frame so as to intersect the rotation axis of the roll. The table is slidably disposed on the base frame, engages with a step formed on the rotary table, and is screwed into a screw hole formed on a worm wheel whose axial movement is restricted. A drive rod that moves back and forth in a position eccentric from the support shaft as the worm wheel rotates, and a drive rod that meshes with the worm wheel and is connected to a rotary shaft of a worm that is rotationally driven by a drive means. An angle detecting means and a rack that meshes with a sector gear arranged on the rotary table and is moved forward and backward by a fluid pressure cylinder arranged on the base frame. A low-pressure circuit that allows the rack to retract as the rotary table rotates due to the forward movement of the drive rod, and a step portion of the rotary table under the meshing action of the rack by urging the rack in the forward direction. Is configured to be switchably connected to a high-voltage circuit that engages the drive rod with pressure to position and fix the table.

Embodiments Next, a straightening roll angle adjusting apparatus according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments. FIG. 1 is a vertical cross-sectional plan view of a straightening device adopting an angle adjusting device according to the present invention, and FIG. 2 is an enlarged vertical cross-sectional plan view of a main portion of the straightening device shown in FIG.

The rectangular base frame 16 of the straightening device 14 has a material to be processed.
Straightening rolls 1 that are paired up and down across 10 pass lines PL
A plurality of 2, 12 are arranged along the pass line PL at a predetermined interval. Each of the straightening rolls 12 is supported by a rotary table 18 which is rotatably supported by a base frame 16, and is configured so that an inclination angle with respect to the pass line PL can be adjusted by an angle adjusting device described later. As shown in FIG. 1, the pair of straightening rolls arranged along the pass line PL has the same configuration, and the upper and lower straightening rolls 12, 12 have the same configuration of the angle adjusting device. Only the lower straightening roll 12 arranged on the downstream side in the material feeding direction will be described.

As shown in FIGS. 2 and 3, a support shaft 20 intersecting with the pass line PL is erected on the bottom portion 16a of the base frame 16 located below the pass line PL, and the rotary table 18 is attached to the support shaft 20.
Is rotatably supported. A pair of bearings 22 and 22 are erected on the upper surface of the rotary table 18 with a predetermined distance therebetween, and the lower straightening roll 12 is rotatably supported by the bearings 22 and 22. The center axis L of the straightening roll 12 and the pass line PL
And, as shown in FIG. 4 (a), are inclined at an angle α. Then, this lower straightening roll 12 and the pass line PL
The material 10 is straightened by passing the material 10 to be processed between the lower straightening roll 12 and the upper straightening roll 12 which is inclined in a direction intersecting with the lower straightening roll 12 while being sandwiched therebetween.

On the upper surface of the rotary table 18, as shown in FIG.
A step portion 18a is formed at the outer edge portion thereof so as to drop in the axial direction by a required height, and a drive rod slidably disposed on one side wall 16b of the base frame 16 parallel to the pass line PL in the step portion 18a. 24 tips are in contact. The drive rod 24
The shaft center of is set to be eccentric from the shaft center of the support shaft 20 of the rotary table 18. A male screw portion 24a is formed over a predetermined length at a portion of the drive rod 24 that is separated from the rotary table 18, and the male screw portion 24a is provided on the side wall 16b of the worm wheel 26 that is axially immovable. It is screwed into the screw hole 26a.

A foam 28 that meshes with the worm wheel 26 is rotatably disposed on the side wall 16b, and the worm 28 is rotationally driven by a motor 30 in forward and reverse directions as shown in FIG. That is, when the motor 30 is rotationally driven in either forward or reverse direction, the worm wheel 26 meshing with the worm 28 is rotated, and the drive rod 24 disposed on the worm wheel 26 has a male screw portion 24a and a screw hole 26a. It moves back and forth in the axial direction under the screwing action with. Since the tip of the drive rod 24 is in contact with the step portion 18a of the rotary table 18, when the drive rod 24 advances, the rotary table 18 is moved as shown in FIG. 4 (b).
Rotates clockwise. When the drive rod 24 retracts, the rotary table 18 rotates counterclockwise under the pressure of a fluid pressure cylinder 38, which will be described later, as shown in FIG. 4 (c). Thereby, the inclination angle α between the axis L of the straightening roll 12 and the pass line PL can be increased or decreased.

Further, the rotation shaft 28a of the worm 28 is
The angle detection means 32 for detecting the rotation of the rotary table is connected from the movement amount of the drive rod 24 moving via the worm 28 and the worm wheel 26.
It is configured to detect 18 rotation angles. The detection signal of the angle detecting means 32 is input to, for example, a control device (not shown) and displayed as a numerical value on the display unit of the control device, whereby the inclination angle α of the straightening roll 12 can be accurately set.

A sector gear 34 having a required radius is provided on the outer edge portion of the rotary table 18 where the step portion 18a is formed and the outer edge upper surface on the opposite side with the support shaft 20 interposed therebetween, and the tooth portion of the sector gear portion 34 projects outward in the radial direction. I am letting you. The sector gear 34 includes the side wall 16
A rack 36 slidably arranged in b is meshed. Further, a double-acting fluid pressure cylinder 38 is arranged on the side wall 16b, and a rack 30 is connected to a piston rod 38a directed inward of the base frame 16 of the cylinder 38, as shown in FIG. . Therefore, by biasing the fluid pressure cylinder 38 in either forward or reverse direction, the rack 30 is moved forward and backward to move the rack 30.
Under the meshing action of 30 and the sector gear 34, the rotary table 18
Rotates in a predetermined direction (see FIG. 5).

Hydraulic pressure is preferably used as the fluid pressure. Further, a high pressure circuit 40 having a high set pressure and a low pressure circuit 42 having a low set pressure are connected to the bottom side of the hydraulic cylinder 38. When the work material 10 is straightened by the straightening device 14, the hydraulic cylinder 38 is connected to the high pressure circuit 40 side, and by firmly pressing the rack 36 against the sector gear 34, the rotary table 18 is loosened. Prevent. Further, when the angle of the straightening roll 12 is adjusted, the rack 36 meshing with the sector gear 34 is moved forward / backward by the rotary table 18 which is switched to the low-voltage circuit 42 side and rotates with the forward / backward movement of the drive rod 24. Is set to get. That is, when the drive rod 24 moves forward,
When the piston rod 38a of the cylinder 38 is pressed against the pressure of the low pressure circuit 42, the relief valve arranged in the circuit 42
44 is configured to actuate to retract the piston rod 38a into the cylinder 38. Further, when the drive rod 24 retracts, the rotary table 18 follows the movement of the drive rod 24 due to the pressure of the low-voltage circuit 42.

Also, a hydraulic circuit connected to the head side of the hydraulic cylinder 38.
When the straightening roll 12 is attached / detached and replaced, 46 functions to retreat the rack 36 largely as shown in FIG. 5 (c). At this time, the drive rod 24 is
It is retracted to a position where it does not interfere with 18.

(Operation of Embodiment) Next, the operation of the straightening roll angle adjusting device according to the embodiment having the above-described configuration will be described. Prior to actual operation of the straightening device 154, the hydraulic cylinder 38 disposed in the straightening device 14 is connected to the low pressure circuit 42 side. At this time, the axis L of the straightening roll 12 is inclined by an angle α with respect to the pass line PL, and the tip of the drive rod 24 is in contact with the step portion 18a of the rotary table 18 (fourth). (See FIG. (A)).

(When decreasing the inclination angle α of the straightening roll 12 with respect to the pass line PL) In such a state, the motor 30 is rotated in a predetermined direction to rotate the worm 28 and the worm wheel 26. The drive rod 24 screwed into the screw hole 26a of the worm wheel 26 advances in the direction of pressing the rotary table 18, as shown in FIG. 4 (b). At this time, the hydraulic cylinder
Since the low-voltage circuit 42 is connected to the bottom side of 38, the rotary table 18 rotates clockwise by the pressing force of the drive rod 24, and the rack 36 meshing with the sector gear 34 resists the pressure of the hydraulic cylinder 38. And then retreat. Then, when the angle detecting means 32 detects the set inclination angle α, the motor 30 is stopped.

Next, when the circuit connected to the bottom side of the hydraulic cylinder 38 is switched to the high voltage circuit 40, the rack 38 that meshes with the sector gear 34 is urged by the cylinder 38 to move forward.
At this time, since the rotary table 18 is restricted from rotating in the counterclockwise direction by the drive rod 24, the rotary table 18 is positioned with the rack 36 and the sector gear 34 firmly meshed with each other. That is, since there is no rattling of the rotary table 18 with respect to the base frame 16, it is possible to effectively prevent the inclination angle of the straightening roll 12 from changing when the material 10 to be processed is straightened.

(When increasing the inclination angle α of the straightening roll 12 with respect to the pass line PL) Next, when increasing the inclination angle α of the straightening roll 12,
It is connected to the bottom side of the hydraulic cylinder 38 and the circuit is a low pressure circuit 42.
And the motor 30 is rotated in the opposite direction to the case where the inclination angle α is reduced. As the worm 28 and the worm wheel 26 rotate, the drive rod 24 screwed into the screw hole 26a of the worm wheel 26 is
As shown in FIG. 7C, the rotary table 18 moves backward.

Since the rack 36 is pressed by the hydraulic cylinder 38, as the drive rod 24 moves backward, the rack 36 moves forward and rotates the turntable 18 counterclockwise. Then, when the angle detecting means 32 connected to the worm 28 reaches the set value, the motor 30 is stopped. As a result, the drive rod 24 stops and the rotation of the turntable 18 is restricted. Next, the straightening roll 12 is positioned and fixed by switching the circuit of the hydraulic cylinder 38 to the high pressure circuit 40 in the same manner as described above.

(When replacing the straightening roll 12) Next, when replacing the straightening roll 12, the hydraulic cylinder
38 is switched to the low-voltage circuit 42, and as shown in FIG. 5 (a), the drive rod 24 is retracted so that its tip is a rotary table.
Completely separate from 18. When the restriction on the rotary table 18 by the drive rod 24 is released, the rack 36 urged by the hydraulic cylinder 38 advances and the rotary table 18 rotates counterclockwise. Then, as shown in FIG. 5 (b), the rotation of the rotary table 18 is stopped when the rack 36 is most advanced. After the straightening roll 12 is replaced in this state, if oil is supplied through the circuit 46 connected to the head side of the hydraulic cylinder 38, as shown in FIG.
36 is retracted and the rotary table 18 is rotated clockwise.

When the rotary table 18 rotates by a predetermined angle, the motor 30 is driven to move the drive rod 24 forward to move the rotary table.
The roll exchange is completed by bringing the tip of the drive rod 24 into contact with the stepped portion 18a of the roll 18.

As described above, according to the straightening roll angle adjusting device of the present invention, since the straightening roll angle adjustment can be remotely controlled, the time required for the adjusting work can be significantly shortened, and the manufacturing efficiency can be improved. Can improve. Further, since the angle of the straightening roll can be accurately detected, the material to be processed can be precisely straightened, and at the same time, a constant straightening accuracy can be achieved.

Further, since the rotary table is firmly positioned and fixed under the pressure of the fluid pressure cylinder, it is possible to effectively prevent the rotary table from rattling with the base frame.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional plan view of a straightening device in which an angle adjusting device according to a preferred embodiment of the present invention is adopted, and FIG. 2 is a vertical cross-sectional plan view showing enlarged main parts of the straightening device shown in FIG. FIG. 3 is an explanatory perspective view showing a schematic configuration of the angle adjusting device, and FIG. 4 (a).
-(C) is explanatory drawing which shows the state which performed the angle adjustment of the straightening roll by the angle adjustment device, respectively, FIG. 5 (a)-(c).
FIG. 6 is an explanatory view showing a process of changing a straightening roll by an angle adjusting device over time, and FIG. 6 is an explanatory view of a multi-roll straightening device according to a conventional technique. 10 …… Working material, 12 …… Correcting roll 18 …… Rotary table, 18a …… Step 20 …… Support shaft, 24 …… Drive rod 26 …… Worm wheel 26a …… Screw hole, 28 …… Warm 28a …… Rotary shaft, 30 …… Motor 32 …… Angle detector, 34 …… Sector gear 36 …… Rack, 38 …… Hydraulic cylinder PL …… Pass line

Claims (2)

[Claims] 1. A pair of straightening rolls (12, 12) facing each other with a pass line (PL) of a material to be processed (10) interposed therebetween,
The straightening roll (12) is configured so that the inclination angle with respect to the pass line (PL) can be adjusted, and a straightening device for straightening the material (10) passing between the rolls (12, 12) by applying a required stress. A rotary table rotatably supporting the straightening roll (12) and rotatably supported by a support shaft (20) arranged in a base frame (16) so as to intersect with the rotary shaft of the roll (12). (18)
And is slidably disposed on the base frame (16), engages with a step portion (18a) formed on the rotary table (18), and is rotationally driven in a state where movement in the axial direction is restricted. A drive rod (24) that is screwed into a screw hole (26a) formed in the worm wheel (26) and that moves forward and backward at a position eccentric from the support shaft (20) as the worm wheel (26) rotates. ) And a sector gear (3 mounted on the rotary table (18).
4) a rack (36) which meshes with the base frame (16) and is moved forward and backward by a fluid pressure cylinder (38) arranged on the base frame (16). The low pressure circuit (42) that allows the rack (36) to retract as the rotary table (18) rotates due to the forward movement of the rod (24) and the rack (36) are urged in the forward direction. High pressure circuit (40) for positioning and fixing the table (18) by engaging the step portion (18a) of the rotary table (18) with the drive rod (24) under engagement with the sector gear (34). An angle adjusting device for a straightening roll, which is configured so that and can be switched. 2. A pair of straightening rolls (12, 12) facing each other with a pass line (PL) of a material to be processed (10) interposed therebetween,
The straightening roll (12) is configured so that the inclination angle with respect to the pass line (PL) can be adjusted, and a straightening device for straightening the material (10) passing between the rolls (12, 12) by applying a required stress. A rotary table rotatably supporting the straightening roll (12) and rotatably supported by a support shaft (20) arranged in a base frame (16) so as to intersect with the rotary shaft of the roll (12). (18)
And a worm wheel (26) slidably disposed on the base frame (16), engaged with a step (18a) formed on the rotary table (18), and restricted in axial movement. ), A drive rod (24) that is screwed into a screw hole (26a) formed in the worm wheel, and moves back and forth in a position eccentric from the support shaft (20) as the worm wheel (26) rotates. Drive means (30) meshing with (26)
Rotating shaft (28a) of worm (28) driven by
And an angle detecting means (32) connected to the sector gear (3) arranged on the rotary table (18).
4) a rack (36) which meshes with the base frame (16) and is moved forward and backward by a fluid pressure cylinder (38) arranged on the base frame (16). The low pressure circuit (42) that allows the rack (36) to retract as the rotary table (18) rotates due to the forward movement of the rod (24) and the rack (36) are urged in the forward direction. High pressure circuit (40) for positioning and fixing the table (18) by engaging the step portion (18a) of the rotary table (18) with the drive rod (24) under engagement with the sector gear (34). An angle adjusting device for a straightening roll, which is configured so that and can be switched.