JP2014131815A - Ring material rolling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ring material rolling method capable of depressing stably without floating and generating overheat and deformation to a ring material.SOLUTION: Shaft centers of a king roll 2 and a mandrel roll 3 are disposed in a straight manner in a vertical direction, and a thickness in a radial direction of a ring material 1 is depressed by the king roll 2 and the mandrel roll 3 so as to roll the ring material 1. By posture control means for controlling roll caliber tool in/out posture of the ring material 1, floating of the ring material 1 is suppressed. In addition, an inclination α of the ring material 1 in both in/out sides 1a, 1b of the roll caliber tool to a plane surface P is controlled to in a range of -20°≤α≤20°.

Description

  The present invention relates to a method for stably rolling down the thickness of a ring-shaped rolled material in the radial direction so as to obtain a predetermined rolling amount.

  For example, when manufacturing a titanium alloy pressure vessel, a fan case of a jet engine, or a seal ring for a bearing part of an aircraft rotary device, a ring rolling rolling apparatus shown in FIG. It is used. FIG. 9 is a schematic diagram of a ring rolling mill according to a conventional example, in which (a) is a side sectional view and (b) is a plan view.

  In the ring roll rolling, the diameter of the ring-shaped rolled material (hereinafter simply referred to as the rolled material) 21 is detected by the tracer 25 in the hot or cold state, and the rolled material 21 is moved by the main roll 22 and the mandrel 23. Thickness rolling in the radial direction is performed, and axial height rolling is performed by a pair of upper and lower edger rolls 24 and 24.

  The main roll 22 is fixed and has a function of rotating the material to be rolled 21 at a constant outer peripheral speed while rotating at a constant speed. The mandrel 23 is arranged following the inner diameter side of the material 21 to be rolled, sandwiches the material 21 to be rolled together with the main roll 22, moves in the direction of the main roll 22, and performs reduction in the thickness direction. . In the edger rolls 14 and 14, generally, at a position facing the main roll 12 at 180 degrees, conical rolls are arranged one above the other and one or both of them are driven, and usually the upper roll moves downward to be rolled. The material 11 is reduced in the height direction.

  The edger rolls 24, 24 have a conical shape because the peripheral speed of the material 21 to be rolled is different between the inner peripheral side and the outer peripheral side (inner peripheral side <outer peripheral side). This is because it needs to be absorbed. Therefore, the edger rolls 24, 24 are arranged so that the tips of the conical rolls coincide with the center of the material 21 to be rolled, and the rolling position of the non-rolled material 21 with respect to the material 21 to be rolled as the diameter of the non-rolled material 21 grows. Move in the horizontal direction (expanded side) (see Patent Document 1).

  However, the plastic flow due to the reduction in the height direction of the material 21 to be rolled using the edger rolls 24, 24 is dominant in the circumferential direction and hardly flows in the height direction. The deformation of is generally small. However, if the reduction in the height direction of the material 21 to be rolled by the edger rolls 24, 24 is too large, the upper and lower end portions of the material 21 to be rolled are coupled with the thickness reduction by the roll bite by the main roll 22 and the mandrel 23. In addition to overheating, the material to be rolled 21 has a problem of increased strain.

  On the other hand, when the material to be rolled 21 is reduced only by the main roll 22 and the mandrel 23, the amount of reduction at the upper part of the material 21 to be rolled is large due to the plastic flow of the base material, and the upper diameter becomes larger than the lower part, or the main roll 22. Further, due to the deflection of the mandrel 23 and the axial misalignment of one of the rolls, the material 21 to be rolled tends to float upward.

JP 2002-239606 A

  Accordingly, an object of the present invention is to provide a method for rolling a ring material that can be stably reduced without causing overheating and distortion in the ring material and without being lifted.

  In order to achieve the above object, the present inventors have provided a method for rolling a ring material that can be stably reduced without being lifted without causing overheating or distortion in the ring material even without an edger roll. As a result of careful investigation, if the ring material is controlled by controlling the posture of the roll bite to prevent the lift and the inclination α is kept within a predetermined angle, the ring material can be stably reduced without causing overheating or distortion. It has been found that this is possible and has led to the present invention.

  That is, the means adopted by the rolling method of the ring material according to claim 1 of the present invention is such that the axis centers of the king roll and the mandrel roll are vertically arranged vertically, and the king roll and the mandrel roll are arranged in the radial direction of the ring material. In the rolling method of the ring material for reducing the wall thickness, the posture control means for controlling the roll bite entry / exit posture of the ring material suppresses the lifting of the ring material and the ring material on both the roll bite entry / exit sides. The inclination α with the horizontal plane is controlled to −20 degrees ≦ α ≦ 20 degrees.

  The means adopted by the ring material rolling method according to claim 2 of the present invention is the ring material rolling method according to claim 1, wherein the attitude control means floats on either the roll bite entry / exit side of the ring material. Lifting height detecting means for detecting the rising height, a pair of centering rolls arranged on both the roll bite entry and exit sides, and the center of the centering roll in a substantially tangential direction where the roll and the ring material are in contact with each other. A centering roll axis tilting means for tilting and a controller for controlling the centering roll axis tilting means are provided.

  At the same time, the means adopted by the rolling method of the ring material detects the lifting height of the ring material by the lifting height detecting means, and based on the detection signal, the centering is performed by the control signal of the controller. The roll axis tilting means is controlled to suppress the lifting of the ring material, and the tilt α with respect to the horizontal surface of the ring material on both the roll bite entry and exit sides is controlled.

  The ring material rolling method according to claim 3 of the present invention is the ring material rolling method according to claim 2, wherein the posture control means further includes the roll bite in and out of the lower surface of the ring material. A support device that supports both sides, the centering roll axis tilting means, and the controller that controls the posture or height position of the support device.

  At the same time, the means adopted by the rolling method of the ring material detects the lifting height of the ring material by the lifting height detecting means, and based on the detection signal, the centering is performed by the control signal of the controller. Controlling the roll axis tilting means and the support to suppress the lifting of the ring material, and controlling the inclination α of the ring material with the horizontal surface on both the roll bite entry and exit sides It is.

  The ring material rolling method according to claim 4 of the present invention employs the ring material rolling method according to claim 3, wherein the support is a sliding plate, and the ring material has a roll bite entry / exit side. It is configured to be able to support both in a horizontal or inclined manner.

  The means adopted by the ring material rolling method according to claim 5 of the present invention is the ring material rolling method according to claim 3, wherein the support is disposed on both the roll bite entry and exit sides, It is a pair of rolls that support the lower surface of the ring material, and is configured to be able to support both the roll bite entry and exit sides of the ring material with a horizontal or height difference.

  The means adopted by the ring material rolling method according to claim 6 of the present invention is the ring material rolling method according to claim 1, wherein the posture control means floats on either the roll bite entry / exit side of the ring material. Lifting height detecting means for detecting the rising height, a pair of centering rolls arranged on both the roll bite entry and exit sides, and the center of the centering roll in a substantially tangential direction where the roll and the ring material are in contact with each other. A centering roll axis tilting means for tilting, a support plate comprising a roll disposed at a position facing the roll bite of the ring material, and supporting the lower surface of the ring material and a roll for suppressing the upper surface of the ring material downward, and A centering roll axis tilting means, a controller for controlling the posture of the sliding plate and the height position of the roll are provided.

  At the same time, the means adopted by the rolling method of the ring material detects the lifting height of the ring material by the lifting height detecting means, and based on the detection signal, the centering is performed by the control signal of the controller. Controlling the roll axis tilting means and the support to suppress the lifting of the ring material, and controlling the inclination α of the ring material with the horizontal surface on both the roll bite entry and exit sides It is.

  The ring material rolling method according to claim 7 of the present invention employs the ring material rolling method according to any one of claims 1 to 6, wherein the ring material is made of a titanium alloy. The ring material is squeezed hot.

  In the rolling method of the ring material according to claim 1 of the present invention, the axial centers of the king roll and the mandrel roll are vertically arranged, and the radial thickness of the ring material is reduced by the king roll and the mandrel roll. The present invention relates to a ring material rolling method.

  According to the rolling method of the ring material according to claim 1 of the present invention, the posture control means for controlling the roll bite entry / exit posture of the ring material suppresses the lifting of the ring material, and the roll bite entry / exit Since the inclination α of the ring material with respect to the horizontal surface on both sides is controlled to −20 ° ≦ α ≦ 20 °, the ring material can be stably and predeterminedly rolled without causing overheating or distortion of the ring material by the conventional edger roll. Is possible.

  Further, according to the rolling method of the ring material according to claim 2 of the present invention, the posture control means includes a lifting height detecting means for detecting the lifting height on either the roll bite entry / exit side of the ring material; A pair of centering rolls arranged on both the roll bite entrance and exit sides, centering roll axis tilting means for tilting the axis of the centering roll in a substantially tangential direction where the roll and the ring material are in contact, and the centering roll axis A controller for controlling the heart tilting means is provided.

  At the same time, according to this rolling method of the ring material, the lifting height detecting means detects the lifting height of the ring material, and based on this detection signal, the centering roll shaft is controlled by the control signal of the controller. The center tilting means is controlled to suppress the lifting of the ring material, and the inclination α with the horizontal surface of the ring material on both the roll bite entry and exit sides is controlled. The rolling load is reduced, and predetermined ring rolling can be stably performed without causing overheating or distortion.

  Further, according to the method for rolling a ring material according to claim 3 of the present invention, the posture control means further includes a support for supporting both the roll bite entry / exit side of the lower surface of the ring material, and the centering roll shaft. The controller for controlling the posture or height position of the center inclination means and the support is provided.

  At the same time, according to this rolling method of the ring material, the lifting height detecting means detects the lifting height of the ring material, and based on this detection signal, the centering roll shaft is controlled by the control signal of the controller. By controlling the center tilting means and the support to suppress the lifting of the ring material and to control the inclination α with the horizontal surface of the ring material on both the roll bite entry and exit sides, the conventional edger roll The rolling load on the ring material is reduced, and predetermined ring rolling can be performed more stably without causing overheating and distortion.

  Still further, according to the rolling method of the ring material according to claim 4 of the present invention, the support is a sliding plate, and can be configured to support both the roll bite entry / exit side of the ring material in a horizontal or inclined manner. Thus, the inclination α of the ring material can be reliably controlled by a relatively simple support mechanism.

  Moreover, according to the rolling method of the ring material according to claim 5 of the present invention, the support is disposed on both the roll bite entry and exit sides, and is a pair of rolls that support the lower surface of the ring material, Since both the roll bite entrance and exit sides of the ring material can be supported horizontally or with a difference in height, the inclination α of the ring material can be reliably controlled by a relatively simple support mechanism as in the case of claim 4 above. Is possible.

  On the other hand, according to the rolling method of the ring material according to claim 6 of the present invention, the posture control means includes a lifting height detection means for detecting the lifting height on either the roll bite entry / exit side of the ring material; A pair of centering rolls arranged on both the roll bite entry / exit side, centering roll axis tilting means for tilting the axis of the centering roll in a substantially tangential direction in contact with the roll and the ring material, and the ring material A sliding tool disposed at a position facing the roll bite and supporting the lower surface of the ring material; a support member comprising a roll for suppressing the upper surface of the ring material downward; the centering roll axis tilting means; the posture of the sliding plate; A controller for controlling the height position of the roll is provided.

  At the same time, according to this rolling method of the ring material, the lifting height detecting means detects the lifting height of the ring material, and based on this detection signal, the centering roll shaft is controlled by the control signal of the controller. By controlling the center tilting means and the support to suppress the lifting of the ring material and to control the inclination α with the horizontal surface of the ring material on both the roll bite entry and exit sides, the conventional edger roll The rolling load on the ring material is reduced, and predetermined ring rolling can be performed more stably without causing overheating and distortion.

  On the other hand, according to the method for rolling a ring material according to claim 7 of the present invention, the ring material is made of a titanium alloy, and the ring material is squeezed hot, so the titanium alloy is overheated by a conventional edger roll. In addition, the occurrence of thick spots and the insufficient rolling reduction can be eliminated, and predetermined ring rolling can be performed.

It is a schematic diagram for demonstrating the rolling method of the ring raw material which concerns on Embodiment 1 of this invention, Comprising: (a) is a rolling part top view of a rolling apparatus, (b) shows a sectional side view. It is a schematic diagram which shows the state in which the ring raw material incline by the lift angle (alpha) in the AA arrow view of FIG.1 (b). It is a schematic diagram for demonstrating the rolling method of the ring raw material which concerns on Embodiment 2 of this invention, Comprising: (a) is a rolling part top view of a rolling apparatus, (b) is a BB arrow view of (a). FIG. FIG. 4 is a schematic diagram showing a state in which the ring material is tilted by a lifting angle α in the direction of arrows CC in FIG. It is a schematic diagram for demonstrating the rolling method of the ring raw material which concerns on Embodiment 3 of this invention, Comprising: (a) is a rolling part top view of a rolling apparatus, (b) is DD arrow view of (a). FIG. FIG. 6 is a schematic diagram showing a state in which the ring material is tilted by a lift angle α in the direction of arrows EE in FIG. It is a schematic plan view for demonstrating the rolling method of the ring raw material which concerns on Embodiment 4 of this invention. It is a schematic diagram for demonstrating the rolling method of the ring raw material which concerns on Embodiment 5 of this invention, Comprising: (a) is a rolling part top view of a rolling apparatus, (b) is a FF arrow line view of (a). FIG. It is a schematic diagram of the ring rolling mill which concerns on a prior art example, Comprising: (a) is a sectional side view, (b) is a top view.

First, a method for rolling a ring material according to Embodiment 1 of the present invention will be described below with reference to FIGS.
1A and 1B are schematic views for explaining a rolling method of a ring material according to Embodiment 1 of the present invention, in which FIG. 1A is a plan view of a rolling part of a rolling apparatus, and FIG. FIG. 2 is a schematic diagram showing a state in which the ring material is tilted by the lift angle α as viewed in the direction of arrows AA in FIG.

  In the rolling method of the ring material according to the first embodiment of the present invention, the axial centers of a king roll (corresponding to a conventional main roll) 2 and a mandrel roll (corresponding to a conventional mandrel) 3 are vertically arranged, The present invention relates to a rolling method of the ring material 1 which is sandwiched from the outer diameter side and the inner diameter side of the ring material 1 by the king roll 2 and the mandrel roll 3 while controlling the posture of the ring material 1 and reduces the thickness in the radial direction.

  Of these king rolls 2 and mandrel rolls 3, the driven king roll 2 circumscribes and rotates the ring material 1, while the mandrel roll 3 is inscribed in the ring material 1 and driven to rotate. Is moved in the direction of the king roll 2 and reduced. Then, the attitude control means for controlling the attitude of the ring material 1 to and from the roll bit 4 suppresses the lifting of the ring material 1 and the inclination α of both the roll bite entry and exit sides, that is, the roll bit 1 of the ring material 1 enters and exits. The inclination α formed by the side 1 and the roll bite exit side 1b with the horizontal plane P is controlled in a range of −20 degrees ≦ α ≦ 20 degrees.

  As a result, since the ring material 1 can be rolled with a stable reduction posture, ring rolling with a predetermined reduction amount can be achieved without causing overheating or distortion of the ring material 1 by the conventional edger roll.

  When the inclination α with the horizontal plane P on the roll bite entry / exit side 1a, 1b of the ring material 1 is less than −20 degrees, the ring material 1 is gradually suppressed downward, while when the inclination α exceeds 20 degrees, This is because the ring material 1 floats upward, and in any case, radial thick spots occur or a predetermined amount of reduction cannot be obtained.

  Here, the roll bite 4 refers to a region in which the ring material 1 is sandwiched between the king roll 2 and the mandrel roll 3, and the inclination α with respect to the horizontal plane P on the roll bite entry / exit sides 1a and 1b of the ring material 1 is illustrated in FIG. As shown in FIG. 2, when FIG. 1B is viewed in the direction of arrows AA, that is, when viewed in a cross-section from the axial center of the ring material 1 to the axial center of the king roll 2, And the lower side of the exit side 1b are the angles formed with the horizontal plane P, and the clockwise angle is expressed as a positive angle and the counterclockwise angle is expressed as a negative angle.

  In addition, the “lifting height” of the ring material 1 is defined as the reference height, which is the upper end height when the ring material 1 is normally rolled in the rolling part of the rolling apparatus. The height of the upper end portion of the raised ring material 1 is said.

  The posture control means includes a lift height detection means (not shown) for detecting the lift height of either the roll bite entry / exit side 1a, 1b of the ring material 1 and the roll bite entry / exit of the lower surface of the ring material 1 A support 5 that supports both sides 1a and 1b, and a controller (not shown) that controls the posture or height position of the support 5 are provided.

  And the floating height of the ring material 1 is detected by the floating height detection means, and based on this detection signal, the posture or height position of the support 5 is controlled by the control signal of the controller, While suppressing the lifting of the ring material 1, and controlling the inclination α between the entrance side 1a and the exit side 1b of the ring material 1 and the horizontal surface P to the horizontal plane P is in the range of −20 degrees ≦ α ≦ 20 degrees. The rolling load applied to the ring material 1 by the conventional edger roll is reduced, and predetermined ring rolling can be stably performed without causing overheating and distortion.

  That is, in the rolling method of the ring material according to the first embodiment of the present invention, the support 5 is a sliding plate arranged to support the lower surfaces of the entry and exit sides 1a and 1b of the roll bit 4 of the ring material 1. 6. By rotating the ring material 1 by turning means (not shown) around a turning axis Q that connects the axial centers of the king roll 2 and the mandrel roll 3 with a predetermined horizontal line Both sides 1a and 1b are configured to be able to support the inclination α formed by the horizontal plane P in a horizontal or inclined manner.

  The lift height detection means uses a CCD camera (not shown) with a water cooling jacket to image FIG. 1B in the direction of arrows AA as shown in FIG. Analytical analysis of the floating height of either the roll bite entry / exit side 1a, 1b of the ring material, that is, the inclination α between the roll bite entry / exit sides 1a, 1b of the ring material 1 with the horizontal plane P in real time, The inclination α of the ring material 1 is detected as a detection signal.

  And after transmitting this detection signal to the said controller, the rotating shaft Q is rotated by the control signal transmitted from the rotating shaft control means accommodated in this controller. As a result, the sliding plate 6 is inclined at a predetermined inclination angle, and the inclination α between the roll bite entry / exit sides 1a and 1b of the ring material 1 and the horizontal plane P is controlled in a range of −20 degrees ≦ α ≦ 20 degrees. is there.

Such a relatively simple mechanism makes it possible to control the inclination α of the ring material 1 with certainty, so that the reduction load on the ring material 1 due to the conventional edger roll is reduced, without causing overheating or distortion. Thus, predetermined ring rolling can be stably performed.
In this case, when the inclination α with respect to the horizontal plane P on the roll bite entry / exit sides 1a and 1b of the ring material 1 is less than −20 degrees, the ring material 1 gradually goes downward and rubs against the sliding plate 6 and seizes. It becomes the basis of.

  As mentioned above, according to the rolling method of the ring material which concerns on Embodiment 1 of this invention, since the support tool 5 supports both the roll bite entrance / exit sides 1a and 1b among the lower surfaces of the ring material 1, it is conventional. The rolling load applied to the ring material 1 by the edger rolls of the present is reduced, and predetermined ring rolling can be stably performed without causing overheating and distortion. And since the said support tool 5 is the sliding board 6, Comprising: Both the roll bite entrance / exit sides 1a and 1b of the ring raw material 1 can be supported horizontally or inclined, Therefore The ring raw material 1 is reliably ensured with a comparatively simple mechanism. The inclination α can be controlled.

  Further, the ring material 1 is made of a titanium alloy, and the ring material 1 is preferably squeezed between 700 to 1000 ° C. in terms of stable ring rolling of the titanium alloy, and the ring material in the presence of an axial roll. The overheating of the material 1, the occurrence of radial thick spots, and the insufficient amount of reduction can be solved.

Next, a ring material rolling method according to Embodiment 2 of the present invention will be described below with reference to FIGS.
FIG. 3 is a schematic diagram for explaining a rolling method of a ring material according to Embodiment 2 of the present invention, in which (a) is a plan view of a rolling part of the rolling device, and (b) is B- of (a). FIG. FIG. 4 is a schematic diagram showing a state in which the ring material is tilted by the lift angle α as viewed in the direction of arrows CC in FIG.
The second embodiment of the present invention differs from the first embodiment in the configuration of the attitude control means and its control method, and the rest is exactly the same in configuration, so the configuration of the attitude control means and its control method is the same. The explanation will be stopped.

  That is, the attitude control means according to the first embodiment of the present invention includes a lift height detection means for detecting the lift height of either the roll bite entry / exit side 1a, 1b of the ring material 1, and the bottom surface of the ring material 1. Among them, a support tool 5 for supporting both the roll bite entry / exit sides 1a and 1b and a controller for controlling the posture or height position of the support tool 5 were provided.

  The floating height detecting means is a CCD camera with a water cooling jacket, and the floating height of one of the roll bite entry / exit sides 1a and 1b of the ring material by the image analysis software from the obtained moving image, that is, the ring material An inclination α of 1 is detected as a detection signal. And after transmitting this detection signal to the said controller, the rotating shaft Q is rotated by the control signal transmitted from the rotating shaft control means accommodated in this controller. As a result, the sliding plate 6 is inclined at a predetermined inclination angle to suppress the lifting of the ring material, and the inclination α between the roll bite entry / exit sides 1a and 1b of the ring material 1 and the horizontal plane P is set to −20 degrees. ≦ α ≦ 20 degrees was controlled.

  On the other hand, the attitude control means according to the second embodiment of the present invention has a lift height composed of a plurality of contact sensors 14 that detect the lift height of either the roll bite entry / exit side 1a, 1b of the ring material 1. And a pair of centering rolls 11, 11 arranged on both the roll bite entry / exit sides 1 a, 1 b and the centers C 2, C 2 of the centering rolls 11, 11, Centering roll axis tilting means 12 and 12 that incline in the substantially tangential line CL direction in contact with each other, and a controller (not shown) for controlling the centering roll axis tilting means 12 and 12 are provided.

  Then, the contact sensor 14 detects the floating height of the ring material 1, and based on this detection signal, the centering roll axis tilting means 12, 12 is controlled by the control signal of the controller, thereby the ring material 1. Is controlled, and the inclination α of the ring material 1 with the horizontal plane P on both the roll bite entry / exit sides 1a and 1b is controlled.

  Here, the proximity sensor 14 is a sensor that detects that an object (ring material 1) has approached the sensor by detecting a change in an electric field or a magnetic field, and a detectable range is specified. And this proximity sensor 14 is orthogonal to the straight line which connects the axial center of the king roll 2 and the mandrel roll 3, and symmetrical with respect to this straight line, when the rolling part of this rolling apparatus is planarly viewed as shown in FIG. In addition, when FIG. 3B is viewed in the direction of the arrow C-C, it is important to arrange a plurality of pieces at the same height as shown in FIG. The larger the number of the proximity sensors 14, the better the detection accuracy of the inclination angle α of the ring material 1 is improved. Moreover, when the detectable range of the proximity sensor 14 is narrow, it is preferable that the proximity sensor 14 is water-cooled from the viewpoint of heat resistance.

  And it detects when the uppermost uppermost part among the upper ends of the ring material 1 during rolling enters the detectable range of the closest proximity sensor 14. Accordingly, since the “lifting height” at the time of detection is known in advance, the inclination α of the ring material 1 with respect to the horizontal plane P on both the roll bite entry / exit sides 1a and 1b can be calculated in advance. Therefore, the inclination α of the detected ring material 1 with respect to the horizontal plane P can be set to a predetermined angle by changing the arrangement height of the proximity sensor 14.

  The centering roll axis tilting means 12 and 12 are attached to roll support tools 13a and 13a that rotatably support the rotation shafts 11a and 11a of the centering rolls 11 and 11, and the center of the back surface of the roll support tools 13a and 13a. The rotating shafts 13b and 13b are provided respectively. The rotating shafts 13b and 13b have rotating means (not shown) that can rotate in a substantially tangential line CL and CL direction in which the ring material 1 contacts the centering rolls 11 and 11, respectively.

  When the lifting of the ring material 1 is detected by the proximity sensor 14, the detected detection signal is transmitted to the controller, and the rotating means is driven by the control signal of the control means built in the controller. Then, by rotating the rotation shafts 13b and 13b, the centering roll axis C2 and C2 can be inclined by the inclination angle β with respect to the mandrel roll axis C1. As a result, the lifting of the ring material 1 is suppressed, and the inclination α between the roll bit entry side 1a and the exit side 1b and the horizontal plane P is controlled within a range of −20 degrees ≦ α ≦ 20 degrees. The rolling load on the ring material 1 due to the roll is reduced, and predetermined ring rolling can be stably performed without causing overheating or distortion.

  Here, when the king roll 2 side is viewed in cross section from the mandrel roll 3 side, the roll bite entry side 1a of the ring material 1 is lifted as shown in FIG. 4 and tilted clockwise with an angle α with the horizontal plane P. In the case where the centering roll axis C2 and C2 are inclined with respect to the mandrel roll axis C1 in the counterclockwise direction by an angle β, the roll bite exit side 1b of the ring material 1 is lifted, contrary to FIG. In the case of tilting counterclockwise with the horizontal plane P at an angle −α, the centering roll axes C2 and C2 are tilted clockwise with respect to the mandrel roll axis C1 by an angle −β.

  In this way, by changing the inclination direction of the centering roll axes C2 and C2 depending on the floating state of the ring material 1, the ring material 1 is prevented from rising and the roll bite entry / exit sides 1a and 1b are connected to the horizontal plane P. The formed inclination α can be controlled within a range of −20 degrees ≦ α ≦ 20 degrees. In order to prevent the ring material 1 from being lifted, it is important that the angle β for inclining the centering roll axes C2 and C2 is slightly larger than the angle α formed by the ring material 1 with the horizontal plane P.

  In this way, the ring material 1 can be prevented from being lifted by a relatively simple mechanism, and the inclination α of the ring material 1 can be controlled. The load is reduced, and predetermined ring rolling can be stably performed without causing overheating or distortion.

Next, a method for rolling a ring material according to Embodiment 3 of the present invention will be described below with reference to FIGS. FIG. 5 is a schematic diagram for explaining a rolling method of a ring material according to Embodiment 3 of the present invention, in which (a) is a plan view of a rolling part of the rolling apparatus, and (b) is a D- of (a). FIG. 6 is a schematic diagram showing a state in which the ring material is tilted by the lift angle α in the direction of arrows EE in FIG.
The third embodiment of the present invention is different from the first embodiment in the configuration of the attitude control means and its control method, and the others are completely the same, so the configuration of the attitude control means and its control method is the same. The explanation shall be stopped.

  That is, the attitude control means according to the first embodiment of the present invention includes a lift height detection means for detecting the lift height of either the roll bite entry / exit side 1a, 1b of the ring material 1, and the bottom surface of the ring material 1. Among them, a support tool 5 for supporting both the roll bite entry / exit sides 1a and 1b and a controller for controlling the posture or height position of the support tool 5 were provided.

  The floating height detecting means is a CCD camera with a water cooling jacket, and the floating height of one of the roll bite entry / exit sides 1a and 1b of the ring material by the image analysis software from the obtained moving image, that is, the ring material An inclination α of 1 is detected as a detection signal. And after transmitting this detection signal to the said controller, the rotating shaft Q is rotated by the control signal transmitted from the rotating shaft control means accommodated in this controller. As a result, the sliding plate 6 is inclined at a predetermined inclination angle to suppress the lifting of the ring material, and the inclination α between the roll bite entry / exit sides 1a and 1b of the ring material 1 and the horizontal plane P is set to −20 degrees. ≦ α ≦ 20 degrees was controlled.

  On the other hand, the attitude control means according to the third embodiment of the present invention has a lift height composed of a plurality of contact sensors 14 that detect the lift height of either the roll bite entry / exit side 1a, 1b of the ring material 1. And a pair of centering rolls 11, 11 disposed on both the roll bite entry / exit sides 1 a, 1 b, and a support 5 for supporting both the roll bite entry / exit sides 1 a, 1 b of the lower surface of the ring material 1, Centering roll axis tilting means 12 and 12 for tilting the center axes C2 and C2 of the centering rolls 11 and 11 in a direction substantially tangent CL where the rolls 11 and 11 and the ring material 1 are in contact with each other, and the centering roll axis tilting means 12 , 12 and a controller (not shown) for controlling the posture or height position of the support 5.

  Then, the contact sensor 14 detects the lifting height of the ring material 1, and based on this detection signal, the centering roll axis tilting means 12, 12 and the support 5 are controlled by the control signal of the controller, While suppressing the lifting of the ring material 1, the inclination α of the ring material 1 with the horizontal plane P on both the roll bite entry / exit sides 1 a and 1 b is controlled.

  That is, in the rolling method of the ring material according to the third embodiment of the present invention, the support 5 is a sliding plate arranged to support the lower surfaces of the entry and exit sides 1a and 1b of the roll bit 4 of the ring material 1. 6. By rotating the ring material 1 by turning means (not shown) around a turning axis Q that connects the axial centers of the king roll 2 and the mandrel roll 3 with a predetermined horizontal line Both sides 1a and 1b are configured to be able to support the inclination α formed by the horizontal plane P in a horizontal or inclined manner.

Next, a ring material rolling method according to Embodiment 4 of the present invention will be described below with reference to FIG. FIG. 7 is a schematic plan view for explaining a ring material rolling method according to Embodiment 4 of the present invention.
The fourth embodiment of the present invention differs from the first embodiment in the configuration of the attitude control means and its control method, and the others are exactly the same, so the configuration of the attitude control means and its control method is the same. The explanation shall be stopped.

  That is, the attitude control means according to the first embodiment of the present invention includes a lift height detection means for detecting the lift height of either the roll bite entry / exit side 1a, 1b of the ring material 1, and the bottom surface of the ring material 1. Among them, a support tool 5 for supporting both the roll bite entry / exit sides 1a and 1b and a controller for controlling the posture or height position of the support tool 5 were provided.

  The floating height detecting means is a CCD camera with a water cooling jacket, and the floating height of one of the roll bite entry / exit sides 1a and 1b of the ring material by the image analysis software from the obtained moving image, that is, the ring material An inclination α of 1 is detected as a detection signal. And after transmitting this detection signal to the said controller, the rotating shaft Q is rotated by the control signal transmitted from the rotating shaft control means accommodated in this controller. As a result, the sliding plate 6 is inclined at a predetermined inclination angle to suppress the lifting of the ring material, and the inclination α between the roll bite entry / exit sides 1a and 1b of the ring material 1 and the horizontal plane P is set to −20 degrees. ≦ α ≦ 20 degrees was controlled.

  On the other hand, in the posture control means according to the fourth embodiment of the present invention, the support 5 is disposed on both the roll bite entry / exit sides 1a, 1b, and a pair of rolls 7, which support the lower surface of the ring material 1, 7. Both the roll bite entry / exit sides 1a and 1b of the ring material 1 can be supported horizontally or with a height difference.

  Then, the floating height of the ring material 1 is detected by the contact sensor 14 of the attitude control means, and based on this detection signal, the centering roll axis tilting means 12 and 12 and the rolls 7 and 7 are controlled by the control signal of the controller. 7 is controlled to suppress the floating of the ring material 1 and the inclination α of the ring material 1 with the horizontal plane P on both the roll bite entry / exit sides 1a and 1b is controlled.

  These rolls 7 and 7 are configured to be able to support both the roll bite entry / exit sides 1a and 1b of the ring material 1 with a horizontal or height difference. In such a configuration, if each of the rotating shafts 7a and 7a of the rolls 7 and 7 is a mechanism that can be moved up and down independently, as in the third embodiment, the ring material is more reliably secured by a relatively simple mechanism. 1 is suppressed, and the inclination α of the ring material 1 can be controlled. Therefore, the rolling load on the ring material 1 by the conventional edger roll is reduced, and it is more stable without causing overheating and distortion. Thus, predetermined ring rolling becomes possible.

  Here, the rolls 7 and 7 have a conical shape in order to match the peripheral speed of the ring material 1 on the inner peripheral side and the outer peripheral side, as in the edger roll of the conventional example. ) It is arranged that the tip is aligned with the center of the ring material 1 so that the support position of the rolls 7 and 7 moves in the horizontal direction (diameter expansion side) as the diameter of the ring material 1 grows. preferable. In place of the rolls 7 and 7, a sliding plate may be used. Further, the number of the rolls 7 and 7 and the sliding plate may be two or more.

Next, a ring material rolling method according to Embodiment 5 of the present invention will be described below with reference to FIG. FIG. 8 is a schematic diagram for explaining a rolling method of a ring material according to Embodiment 5 of the present invention, in which (a) is a plan view of a rolling part of the rolling apparatus, and (b) is F- of (a). FIG.
The fifth embodiment of the present invention differs from the first embodiment in the configuration of the attitude control means and its control method, and the others are completely the same, so the configuration of the attitude control means and its control method is the same. The explanation shall be stopped.

  That is, the attitude control means according to the first embodiment of the present invention includes a lift height detection means for detecting the lift height of either the roll bite entry / exit side 1a, 1b of the ring material 1, and the bottom surface of the ring material 1. Among them, a support tool 5 for supporting both the roll bite entry / exit sides 1a and 1b and a controller for controlling the posture or height position of the support tool 5 were provided.

  The floating height detecting means is a CCD camera with a water cooling jacket, and the floating height of one of the roll bite entry / exit sides 1a and 1b of the ring material by the image analysis software from the obtained moving image, that is, the ring material An inclination α of 1 is detected as a detection signal. And after transmitting this detection signal to the said controller, the rotating shaft Q is rotated by the control signal transmitted from the rotating shaft control means accommodated in this controller. As a result, the sliding plate 6 is inclined at a predetermined inclination angle to suppress the lifting of the ring material, and the inclination α between the roll bite entry / exit sides 1a and 1b of the ring material 1 and the horizontal plane P is set to −20 degrees. ≦ α ≦ 20 degrees was controlled.

  On the other hand, the posture control means according to the fifth embodiment of the present invention includes a proximity sensor 14 that detects the floating height of either the roll bite entry / exit side 1a, 1b of the ring material 1, and the roll bite entry / exit side 1a, A centering in which a pair of centering rolls 11, 11 disposed on both sides of 1 b and the axes C 2, C 2 of the centering rolls 11, 11 are inclined in directions of substantially tangent lines CL, CL where the rolls 11, 11 contact the ring material 1, respectively. Roll axis center tilting means 12 and 12 are provided.

  At the same time, this attitude control means is disposed at a position facing the roll bit 4 of the ring material 1 and includes a sliding plate 8 that supports the lower surface of the ring material 1 and a support 5 that includes a roll 9 that suppresses the upper surface of the ring material 1 downward. And a controller (not shown) for controlling the centering roll axis tilting means 12, 12, the attitude of the sliding plate 8 and the height position of the roll 9.

  And according to this rolling method of the ring material, the proximity sensor 14 detects the floating height of the ring material 1, and based on this detection signal, the centering roll axis tilting means 12, 12 and the support 5 are controlled to suppress the floating of the ring material 1 and to control the inclination α of the ring material 1 with respect to the horizontal plane P on both the roll bite entry / exit sides 1a and 1b.

  Here, like the sliding plate 6 of the first embodiment, the sliding plate 8 is not shown with a rotating shaft (not shown) connecting the shaft centers of the king roll 2 and the mandrel roll 3 with a predetermined horizontal line. If a rotating shaft (not shown) is attached to the roll 9 while being rotated by the rotating means, and the mechanism can move up and down like the rolls 7 and 7 of the fourth embodiment, the roll bite entry / exit side of the ring material 1 It is possible to support the inclination α formed by both 1a and 1b with the horizontal plane P in a horizontal or inclined manner.

  As mentioned above, according to the rolling method of the ring material 1 which concerns on Embodiment 2-5 of this invention, the proximity sensor (lifting height detection means) 14 detects the lifting height of the ring material 1, and this detection Based on the signal, the control signal of the controller controls the tilt of the centering roll shaft center tilting means 12, 12 and the posture or height position of the support 5. As a result, the lifting of the ring material 1 can be more reliably suppressed and the inclination α of the ring material 1 can be controlled, so that the predetermined ring rolling can be performed more stably without causing overheating and distortion. It becomes.

<Example A>
According to the ring rolling method of the ring material according to the first embodiment of the present invention described above, a ring material having an outer diameter of 700 mm, an inner diameter of 500 mm, and a height of 260 mm made of a titanium alloy Ti-6Al-4V, which is a typical titanium alloy, is used. In a numerical experiment in which the temperature is reduced by 20 mm in a hot direction at 1000 ° C., the inclination α with the horizontal plane on the roll bite entry / exit side of the ring material is changed by 10 degrees within a range of −60 degrees ≦ α ≦ 60 degrees, The element analysis method was used.

The conditions of each roll and the reduction are as follows.
・ King roll: Roll diameter 1300mm
Rotation speed 10min ^-1
・ Mandrel roll: Roll diameter 400mm
Rolling speed 1.5mm / s

  Table 1 shows the rolling stability of each experimental result. The circles in the table indicate that the rolling orientation of the ring material is converged and stable in the roll bite region, the Xs indicate that the ring material orientation is either up or down, and deviates from the roll bite region. Indicates that the orientation of the ring material tends to be out of the roll bite region in either the vertical direction.

  According to the above embodiment, in Embodiments 1 to 5, it is possible to stably reduce the posture to 20 mm in the radial direction without causing distortion or overheating, and the thickness after rolling is substantially uniform. However, in Comparative Examples 1-3, it is assumed that the ring material 1 is pressed downward as the ring material is reduced, and as a result, overheating and distortion occur after the reduction of 20 mm. Moreover, in Comparative Example-4, although the reduction to about 20 mm was possible, since the posture of the ring material 1 during the reduction was unstable, it is assumed that the thickness after rolling is uneven.

  On the other hand, in Comparative Examples -6 to 8, it is assumed that the ring material 1 floats upward as the ring material 1 is reduced, and that overheating and distortion occur as a result after the reduction of 20 mm. In Comparative Example-5, although the reduction to about 20 mm was made, the posture of the ring material 1 during the reduction was unstable, so that it is assumed that the thickness after rolling is uneven as in Comparative Example-4. .

<Example B>
A numerical experiment by an elasto-plastic finite element analysis method was performed under the same conditions as in Example A, except that the ring material rolling method according to the second embodiment of the present invention was followed. The roll diameter of the centering roll was 200 mm. The rolling stability in each example and comparative example was the same as in Table 1.

  As described above, according to the ring rolling method of the present invention, the inclination α with the horizontal surface of the ring material on the roll bite entry / exit side is set to −20 degrees by the attitude control means for controlling the roll bite entry / exit attitude of the ring material. By controlling in the range of ≦ α ≦ 20 degrees, stable reduction is possible, so that predetermined ring rolling can be performed without causing overheating and distortion of the ring material.

C1: Mandrel roll axis,
C2: Centering roll axis,
CL: Tangent line between centering roll and ring material,
P: Horizontal plane.
Q: Rotating shaft that connects the axes of the king roll and mandrel roll with a predetermined horizontal line,
α: Inclination with the horizontal plane on both the roll bite entry and exit sides of the ring material
β: Angle of inclination of the centering roll axis with respect to the mandrel roll axis,
1: Ring material, 1a: Roll bite entry side, 1b: Roll bite exit side,
2: King roll,
3: Mandrel roll,
4: Roll byte,
5: Support tool,
6: Sliding board,
7: roll, 7a: rotating shaft,
8: Sliding board,
9: Roll,
11: Centering roll, 11a: Rotating shaft,
12: Centering roll axis inclination means,
13a: roll support, 13b: rotating shaft,
14: Proximity sensor (lifting height detection means)

Claims (7)

Place the axis of the king roll and mandrel roll vertically and vertically,
In the rolling method of the ring material to reduce the radial thickness of the ring material by the king roll and mandrel roll,
By posture control means for controlling the roll bite entry / exit posture of the ring material,
While suppressing the lifting of the ring material,
A ring material rolling method, wherein an inclination α of the ring material with respect to a horizontal surface on both the roll bite entry and exit sides is controlled to −20 degrees ≦ α ≦ 20 degrees. The posture control means is
A lifting height detecting means for detecting the lifting height on either the roll bite entry / exit side of the ring material;
A pair of centering rolls arranged on both the roll bite entry and exit sides;
Centering roll axis center tilting means for tilting the axis of the centering roll in a substantially tangential direction in which the roll and the ring material are in contact with each other;
A controller for controlling the centering roll axis tilting means;
By detecting the lifting height of the ring material by the lifting height detection means, based on this detection signal, the centering roll shaft center tilting means is controlled by the control signal of the controller,
The ring material rolling method according to claim 1, wherein the ring material is prevented from being lifted and the inclination α of the ring material with respect to the horizontal surface on both the roll bite entry and exit sides is controlled. The attitude control means further comprises:
A support that supports both the roll bite entry and exit sides of the lower surface of the ring material,
The controller for controlling the centering roll axis tilting means and the posture or height position of the support;
Detecting the lifting height of the ring material by the lifting height detecting means;
Based on this detection signal, the centering roll axis tilting means and the support tool are controlled by the control signal of the controller,
The ring material rolling method according to claim 2, wherein the ring material is prevented from being lifted and the inclination α of the ring material with respect to the horizontal surface on both the roll bite entry and exit sides is controlled.   4. The method for rolling a ring material according to claim 3, wherein the support is a sliding plate and is configured to be able to support both the roll bite entry and exit sides of the ring material in a horizontal or inclined manner.   The support is a pair of rolls arranged on both the roll bite entry and exit sides and supporting the lower surface of the ring material, and supports both the roll bite entry and exit sides of the ring material with a horizontal or height difference. The ring material rolling method according to claim 3, wherein the ring material is rolled. The posture control means is
A lifting height detecting means for detecting the lifting height on either the roll bite entry / exit side of the ring material;
A pair of centering rolls arranged on both the roll bite entry and exit sides;
Centering roll axis center tilting means for tilting the axis of the centering roll in a substantially tangential direction in which the roll and the ring material are in contact with each other;
A support tool comprising a roll plate disposed at a position facing the roll bite of the ring material, and supporting a lower surface of the ring material and a roll for suppressing the upper surface of the ring material downward;
A controller for controlling the centering roll axis inclination means, the posture of the sliding plate and the height position of the roll;
Detecting the lifting height of the ring material by the lifting height detecting means;
Based on this detection signal, the centering roll axis tilting means and the support tool are controlled by the control signal of the controller,
The ring material rolling method according to claim 1, wherein the ring material is prevented from being lifted and the inclination α of the ring material with respect to the horizontal surface on both the roll bite entry and exit sides is controlled. The ring material rolling method according to any one of claims 1 to 6, wherein the ring material is made of a titanium alloy, and the ring material is squeezed hot.

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