JP2006289451A - Ring member manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling process capable of uniformizing the thickness of a ring-shaped member over the entire circumference, uniformizing the surface roughness of the outer circumferential surface over the entire circumference, uniformizing the circumferential length for each manufactured product, and easily rolling the ring-shaped members of different sizes. <P>SOLUTION: In this rolling process, the gap between the outer circumferential surface of a small rolling roller 11 and the outer circumferential surface of a large rolling roller 12 is calculated, and the thickness of a ring-shaped member W is controlled by feeding back the data of a draft axial position sensor 21 to detect the movement in the draft axial direction of the small rolling roller 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rolling process for a ring member in a method for manufacturing the ring member.

As background art, there is a patent document regarding an invention of a ring-shaped member rolling apparatus and an invention of a rolling method thereof as shown in FIG. In the rolling method of the ring-shaped member described in this patent document, the plate width, plate thickness, and circumferential length of the ring-shaped member W measured in advance before the rolling process, and the distance between the rollers (roller 111 and roller 115 during the rolling process). The ring-shaped member is rolled by controlling the pulling force of the roller 115 and the pressing force of the roller 114 based on the circumference of the ring-shaped member W being processed calculated based on the distance between the two.
International Publication Number WO 2004/050270 A1 (8th and 9th pages, FIG. 1) International Publication Number WO 2004/050274 A1 (pages 5, 6 and 1)

  However, in the invention described in the patent document, the target plate thickness of the ring-shaped member W is only controlled by a load such as the tensile force of the roller 115 and the pressing force of the roller 114. There is a possibility that a strict correlation cannot be obtained between dimensions before and after processing. Therefore, the variation of the plate thickness and the plate width of the ring-shaped member W is increased over the entire circumference, and the surface roughness of the outer peripheral surface is also deteriorated. In addition, the load cells 128 and 129 are subjected to repeated loads and the like, and the bonded state of the strain gauge deteriorates over time, so that maintenance of the load cells 128 and 129 becomes necessary periodically. Further, since the friction coefficient between the ring-shaped member W and the rollers 128 and 129, the frictional resistance force of each movable part, the deformation resistance, and the like are involved, the correlation between the deformation amount and the load value becomes complicated, and the rings of different sizes It is necessary to set a load such as a tensile force of the roller 115 and a pressing force of the roller 114 on each of the shaped members W by experiments.

  Accordingly, the present invention can make the plate thickness uniform over the entire circumference of the ring-shaped member, make the surface roughness of the outer peripheral surface uniform over the entire circumference, and make the circumference of each manufactured product uniform. An object of the present invention is to provide a rolling process that can facilitate the rolling of ring members having different sizes.

In order to achieve the above object, the present invention has the following features.
(1) The present invention provides a rolling axial direction from the axis of the first rolling roller to the axis of the second rolling roller while passing the ring-shaped member between the first rolling roller and the second rolling roller and pulling it by the tension roller. In the method of manufacturing a ring-shaped member having a rolling step of rolling the ring-shaped member by applying a load to the feedback, by feeding back data of a rolling axial position sensor that detects the amount of movement of the first rolling roller in the rolling axial direction, It has the rolling process which calculates the clearance gap between the outer peripheral surface of a 1st rolling roller, and the outer peripheral surface of a 2nd rolling roller, and controls the plate | board thickness of a ring-shaped member.

(2) According to the present invention, in the method for manufacturing a ring-shaped member described in (1), the circumference of the ring-shaped member is calculated by feeding back data of a tension axial direction position sensor that detects the movement amount of the tension roller. A finishing rolling stage that finishes the plate thickness of the ring-shaped member to a target value with respect to the raceway of the first rolling roller corresponding to the plate thickness of the ring-shaped member calculated from the circumferential length of the ring-shaped member. The trajectory of the first rolling roller is corrected to the position where the crushing amount is added in consideration of the rigidity of the first rolling roller and the second rolling roller, and the first rolling roller, the second rolling roller, and the tension roller At the start of the acceleration stage for increasing the rotation speed, the total amount of the thickness of the rough material before rolling at the start of the acceleration stage and the reverse crowning amount of the outer peripheral surface of the second rolling roller from the outer peripheral surface of the second rolling roller. Set the first rolling roller to the initialization position is apart position,
The finish rolling stage has a rolling step of fixing the first rolling roller at a target setting position that is a position obtained by adding the crushing amount from a target position of the first rolling roller.

(3) In the method for manufacturing a ring-shaped member according to (2), the initial setting position is a position where the first rolling roller is brought close to the second rolling roller and the first rolling roller contacts the ring-shaped member. It is characterized by having a rolling process to be.

(4) In the method for manufacturing a ring member according to any one of (1) to (3), the present invention sets the position of the first rolling roller from the acceleration stage to the finish rolling stage by a reduction axial position sensor. The ring-shaped member assembly stage, which is a pre-process of the acceleration stage, and the ring-shaped member removal stage, which is a post-process of the finish rolling stage, have a rolling process of detecting the position of the first rolling roller by a servo motor. It is characterized by that.

(5) The present invention provides a rolling axial direction from the axis of the first rolling roller to the axis of the second rolling roller while the ring-shaped member is passed between the first rolling roller and the second rolling roller and pulled by the tension roller. In a ring-shaped member manufacturing apparatus having a rolling process for rolling a ring-shaped member by applying a load to the rolling shaft, a reduction axial position sensor that detects a movement amount of the first rolling roller in the reduction axial direction, and a feedback of the movement amount It has the control part which calculates the clearance gap between the outer peripheral surface of a 1st rolling roller, and the outer peripheral surface of a 2nd rolling roller, and controls the plate | board thickness of a ring-shaped member.

The present invention having such features can obtain the following operations and effects.
(1) The present invention provides a rolling axial direction from the axis of the first rolling roller to the axis of the second rolling roller while passing the ring-shaped member between the first rolling roller and the second rolling roller and pulling it by the tension roller. In the method of manufacturing a ring-shaped member having a rolling step of rolling the ring-shaped member by applying a load to the feedback, by feeding back data of a rolling axial position sensor that detects the amount of movement of the first rolling roller in the rolling axial direction, Since it has the rolling process which calculates the clearance gap between the outer peripheral surface of a 1st rolling roller, and the outer peripheral surface of a 2nd rolling roller, and controls the plate | board thickness of a ring-shaped member, the detected outer diameter of a 2nd rolling roller and 1st Since the thickness of the ring-shaped member is detected in real time by feeding back the gap with the outer diameter of the rolling roller, the plate thickness can be made uniform over the entire circumference of the ring-shaped member. Effects that can be easily rolled in different sizes of the ring-shaped member by simply resetting easily the movement of even the first rolling roller a grayed-shaped member is obtained.

(2) According to the present invention, in the method for manufacturing a ring-shaped member described in (1), the circumference of the ring-shaped member is calculated by feeding back data of a tension axial direction position sensor that detects the movement amount of the tension roller. A finishing rolling stage that finishes the plate thickness of the ring-shaped member to a target value with respect to the raceway of the first rolling roller corresponding to the plate thickness of the ring-shaped member calculated from the circumferential length of the ring-shaped member. The trajectory of the first rolling roller is corrected to a position where the crushing amount is added in consideration of the rigidity of the first rolling roller and the second rolling roller, and the first rolling roller, the second rolling roller, and the tension roller At the start of the acceleration stage for increasing the rotation speed, the total amount of the thickness of the rough material before rolling at the start of the acceleration stage and the reverse crowning amount of the outer peripheral surface of the second rolling roller from the outer peripheral surface of the second rolling roller. Set the first rolling roller to the initialization position is apart position,
The finishing rolling stage has a rolling step of fixing the first rolling roller at a target setting position that is a position obtained by adding the crushing amount from the target position of the first rolling roller. Therefore, the effect described in (1) In addition, since the circumference of the ring-shaped member is detected in real time by feeding back the detected position of the tension roller, the circumference of each manufactured product can be made uniform. In the finish rolling stage, the position of the first rolling roller The effect that the surface roughness of the outer peripheral surface can be made uniform over the entire circumference is obtained by rotating the first rolling roller while fixing.

(3) In the method for manufacturing a ring-shaped member according to (2), the initial setting position is a position where the first rolling roller is brought close to the second rolling roller and the first rolling roller contacts the ring-shaped member. Therefore, in addition to the effects described in (1) or (2), the thickness of the ring-shaped member is removed over the entire circumference by removing the influence of rigidity deformation and thermal expansion of the ring-shaped member. The effect that can be made uniform is obtained.

(4) In the method for manufacturing a ring member according to any one of (1) to (3), the present invention sets the position of the first rolling roller from the acceleration stage to the finish rolling stage by a reduction axial position sensor. The ring-shaped member assembly stage, which is a pre-process of the acceleration stage, and the ring-shaped member removal stage, which is a post-process of the finish rolling stage, have a rolling process of detecting the position of the first rolling roller by a servo motor. Therefore, in addition to the effects described in (1) to (3), there is an effect that the position of the first rolling roller can be accurately detected and the thickness of the ring-shaped member can be made uniform over the entire circumference.

(5) The present invention provides a rolling axial direction from the axis of the first rolling roller to the axis of the second rolling roller while the ring-shaped member is passed between the first rolling roller and the second rolling roller and pulled by the tension roller. In a ring-shaped member manufacturing apparatus having a rolling process for rolling a ring-shaped member by applying a load to the rolling shaft, a reduction axial position sensor that detects a movement amount of the first rolling roller in the reduction axial direction, and a feedback of the movement amount Since it has a control part which controls the plate | board thickness of a ring-shaped member by calculating the clearance gap between the outer peripheral surface of a 1st rolling roller, and the outer peripheral surface of a 2nd rolling roller, the detected outer diameter of a 2nd rolling roller and 1st The thickness of the ring-shaped member can be detected in real time by feeding back the amount of clearance with the outer diameter of the rolling roller, and the plate thickness can be made uniform over the entire circumference of the ring-shaped member. The Rolling can also facilitate the effect of different sizes of the ring-shaped member by simply re easily set the movement of the first rolling roller is obtained.

Examples of the present invention will be described below.
First, the structure of the rolling apparatus 1 which implement | achieves the rolling method of this invention is demonstrated. Here, FIG. 1 is a top view of the rolling device 1, FIG. 2 is a side view of the rolling device 1, and FIG. 3 is an enlarged side view of the small rolling roller 11. As shown in FIG. 1, the rolling device 1 includes a small rolling roller 11 and a large rolling roller 12 that perform rolling while being in contact with a ring-shaped member W. And the small support roller 13 and the large support roller 14 which give the rotational drive to the small rolling roller 11 are provided. A ball screw 25 and a servo motor 23 are arranged to move the large support roller 14. As shown in FIG. 2, the small support roller 13 and the large support roller 14 are disposed on the same base and integrated. Two small support rollers 13 are provided (13a, 13b), each having a shape that sandwiches the ring-shaped member W vertically when viewed in the side view shown in FIG. These rollers are respectively held in the rolling device 1 so as to be freely rotatable by bearings, and are held in a state where the perpendicularity with high accuracy is maintained with respect to the base. As shown in FIG. 3, the small rolling roller 11 is rotatably fixed to the base 31 via a bearing. The base 31 is arranged so as to be freely movable in the left-right direction in FIG. 1 while preventing the base 31 from being lifted by the machine base 32 and the holding members 32a and 32b. In addition, a reduction axial direction position sensor 21 is installed under the large rolling roller 12.

  As shown in FIG. 3, the contact portion 31 a is provided on the base 31, and the position of the small rolling roller 11 is measured by the contact of the sensor head 21 a of the roll-down axial position sensor 21. Here, since the variation in the plate thickness of the ring-shaped member W after the rolling process is required to be within a range of several μm over the entire circumference, it is necessary to measure the position of the small rolling roller 11 with extremely high accuracy. There is. For this reason, it is desirable to use the down-axis direction position sensor 21 that is an optical length measurement sensor and has a resolution of about 0.1 μm. In addition, in order to detect the position of the small rolling roller 11 more accurately, the reduction axial direction position sensor 21 is arranged as close to the small rolling roller 11 as possible.

  In addition, as shown in FIG. 1, in order to obtain a target circumferential length of the ring-shaped member W, a tension roller 15 is disposed in a direction perpendicular to the reduction axis direction for reducing the large support roller 14 toward the large rolling roller 12. ing. A ball screw 26 and a servo motor 24 are arranged to move the tension roller 15. Further, in order to detect the position of the tension roller 15, a tension axis direction position sensor 22 is arranged. Then, the position of the tension roller 15 is detected by the tension axis direction position sensor 22, and the distance between the detected position of the tension roller 15 and the position of the small rolling roller 11 is calculated. Therefore, the circumferential length of the ring-shaped member W can be calculated from the calculated distance and the outer diameter of the small rolling roller 11. As described above, the variation in the thickness of the ring-shaped member W after the rolling process is required to be within a range of several μm over the entire circumference. Therefore, the tension is required to detect the circumferential length of the ring-shaped member W with high accuracy. It is necessary to detect the position of the roller 15 with extremely high accuracy. For this reason, it is desirable to use a high-precision sensor such as a magnetic sensor as the tension axis direction position sensor 22.

  As described above, the rolling axial position sensor 21 used in the present invention has its tip 21a repeatedly contacting the contact portion 31a of the base 31, but has a ball bearing in its structure, and is repeatedly operated. It has extremely high durability. Further, since the tension axis direction position sensor 22 is a non-contact type sensor such as a magnetic sensor, a load such as the servo motor 24 is not directly applied to the tension axis direction position sensor 22. Therefore, the burden on the operator of the reduction axial direction position sensor 21 and the tension axial direction position sensor 22 is reduced.

  Next, the outline | summary of the rolling method of this invention which uses the rolling apparatus 1 which has the above structures is demonstrated. First, the plate thickness of the ring-shaped member W before processing is measured in advance by a measuring device provided in the rolling device 1. Next, as shown in FIG. 4, the ring-shaped member W is formed into an oval shape, and both ends are attached to the small-rolling roller 11 and the tension roller 15. Next, the large support roller 14 is moved to the large rolling roller 12 side by the action of the servo motor 23 and the ball screw 25. Then, the small support rollers 13 a and 13 b that come into contact with the large support roller 14 come into contact with the small rolling roller 11. When the large support roller 14 is further moved toward the large rolling roller 12, the ring-shaped member W attached to the small rolling roller 11 comes into contact with the large rolling roller 12. As shown in FIG. 1, the pressing force of the large support roller 14 is transmitted to the small rolling roller 11 through the small support rollers 13 a and 13 b and is sandwiched between the small rolling roller 11 and the large rolling roller 12. The plate thickness of the ring-shaped member W is processed. The ring-shaped member W is circulated by rotating the large rolling roller 12 directly connected to the motor and rotating the small rolling roller 11, the large rolling roller 12, the small support roller 13, and the large support roller 14. On the other hand, the ring-shaped member W is pulled by the servo motor 24 and the ball screw 26 while measuring the position of the pulling roller 15 by the pulling axial direction position sensor 22, and the circumferential length of the ring-shaped member W is processed.

  When it is detected that the small rolling roller 11 and the pulling roller 15 have reached the target positions by the rolling axial position sensor 21 and the pulling axial position sensor 22, the processing is stopped. Then, the small support roller 13 and the large support roller 14 are retracted, the pulling roller 15 is brought close to the small rolling roller 11 side, and the ring-shaped member W is taken out.

  Note that the down-axis direction position sensor 21 has a limit in the detection range because it uses a highly accurate sensor with excellent resolution. Therefore, the detection of the position of the small rolling roller 11 outside the detection range of the rolling axial direction position sensor 21 is performed using information of an encoder (not shown) built in the servo motor 23. Specifically, during rolling processing in a state as shown in FIG. 1 (acceleration stage, rough rolling stage, deceleration stage, finish rolling stage, circumference measurement stage, which will be described later), information on the reduction axial position sensor 21 When attaching or removing the ring-shaped member in the state shown in FIG. 4, information of an encoder (not shown) built in the servo motor 23 is used.

  Next, specific relationship between time and position of the tension roller 15, the small rolling roller 11, and the large rolling roller 12 will be described with reference to FIGS. 5 shows the position of the pulling roller 15 per hour, FIG. 6 shows the position of the small rolling roller 11 per hour, and FIG. 7 shows the position of the large rolling roller 12 per hour. As shown in FIGS. 5 to 7, the rolling process of the ring-shaped member W of the present invention includes an acceleration stage (acceleration ST), a rough rolling stage (rough rolling ST), a reduction stage (deceleration ST), and a finish rolling stage (finishing). Rolling ST) and a circumference measurement stage (circumference measurement ST). Here, the acceleration stage is a stage in which the rotational speed of each of the tension roller 15, the small rolling roller 11, and the large rolling roller 12 is increased during processing. A rough rolling stage is a stage which performs rough rolling of a ring-shaped member. The speed reduction stage is a stage in which the rotational speed of each of the tension roller 15, the small rolling roller 11, and the large rolling roller 12 is decreased when finishing the processing. The finish rolling stage is a stage that performs finishing for adjusting the surface roughness of the outer peripheral surface of the ring-shaped member. The circumference measurement stage (circumference measurement ST) is a stage for measuring the circumference of the ring-shaped member W after the rolling process. FIG. 8 is a diagram showing the relationship between the reverse crowning amount δ1 of the large rolling roller 12 and the ring-shaped member W. As shown in FIG. 8, the rolling surface of the large rolling roller 12 has a shape indicated by a radius R (reverse crowning shape).

  First, the position of the tension roller 15 per time will be specifically described with reference to FIG. FIG. 5 shows the position of the tension roller 15 per time by taking time on the horizontal axis and the position of the tension roller 15 on the vertical axis. As shown in FIG. 5, the tension roller 15 moves from the initial installation position (initial position) to the target position via the acceleration stage, the rough rolling stage, the deceleration stage, and the finishing rolling stage.

  The time schedule in each stage of the tension roller 15 is set as follows. First, in order to secure a predetermined production amount of the ring-shaped member W, a processing time required from the acceleration stage to the finish rolling stage is determined in advance. And, in the rough rolling stage where the rolling of the ring-shaped member W is most advanced, the position of the tension roller 15 is grasped in real time by the tensile axis direction position sensor 22 and is recognized as suitable for rolling of the ring-shaped member W from experience. The moving speed of the tension roller 15 is maintained at a constant speed. At this time, it moves on the track 51 in FIG. Further, even in a finish rolling stage where finishing is performed, for example, by making the surface roughness of the outer peripheral surface of the ring-shaped member W uniform, and the like, based on experience, the position of the tension roller 15 is grasped in real time by the tension axis direction position sensor 22. The moving speed of the tension roller is maintained at a constant speed recognized as being suitable for finishing the ring-shaped member W. At this time, it moves on the track 52 in FIG. Therefore, the processing time allocated to the rough rolling stage and the finish rolling stage is determined by experience. Then, from the processing time required from the acceleration stage to the finish rolling stage, the processing time assigned to the rough rolling stage and the finishing rolling stage is subtracted to determine the processing time for the acceleration stage and the deceleration stage.

  Further, as shown in FIG. 5, the trajectory of the position of the tension roller 15 is to move the tension roller 15 to a position in consideration of the springback amount of the ring-shaped member W with respect to the target position in the finish rolling stage.

  Next, the position of the small rolling roller 11 per time will be specifically described with reference to FIG. FIG. 6 shows the position of the small rolling roller 11 per hour by taking time on the horizontal axis and the position of the small rolling roller 11 on the vertical axis. As shown in FIG. 6, the small rolling roller 11 moves from the initial installation position to the target position via the acceleration stage, rough rolling stage, deceleration stage, and finish rolling stage.

  The trajectory of the position of each small rolling roller 11 on each stage is set as follows. First, the plate thickness of the ring-shaped member W before rolling is measured in advance. Based on the measured plate thickness data of the ring-shaped member W, the coarse plate thickness position is determined. Specifically, the coarse material plate thickness position is a position away from the outer peripheral surface of the large rolling roller 12 by the amount of the plate thickness of the ring-shaped member W before rolling.

  From the rough material plate thickness position to the target plate thickness position, the circumference calculated from the position of the tension roller 15 is based on the premise that the volume of the ring-shaped member W is constant and the plate width is also constant. First, the target value of the plate thickness of the ring-shaped member W for each hour is obtained. And the position of the small rolling roller 11 for implement | achieving the target value of the plate | board thickness of the ring-shaped member for every time is calculated as a basic track. A curve 61 indicated by a dotted line in FIG. 6 represents this basic trajectory. By moving the small rolling roller 11 on this basic track, the plate thickness can be managed while accommodating the plastic deformation of the ring-shaped member W during the rolling process. The plate thickness can be made uniform over the entire circumference.

  However, in the actual rolling process, the cross-sectional shape of the ring-shaped member required after the rolling process, the rigidity of each roller such as the small rolling roller 11 and the large rolling roller 12, and the rigidity of the bearing attached to each roller are taken into consideration. Must. Therefore, the present invention is characterized in that the actual track of the small rolling roller 11 is determined based on this basic track. Specifically, it is defined as follows. First, an initial setting position as the position of the small rolling roller 11 at the start of rolling is determined as follows. As shown in FIG. 8, the cross-sectional shape of the outer peripheral surface of the large rolling roller 12 has a shape in which R is formed on the inner diameter side (hereinafter referred to as a reverse crowning shape). The reason why the reverse crowning shape is formed in this way is that the cross section of the ring-shaped member W needs to be formed as shown in FIG. 8B after the rolling process. Therefore, when the small rolling roller 11 to which the ring-shaped member W is attached is moved in the reduction axis direction and the ring-shaped member W is brought into contact with the large rolling roller 12, the ring-shaped member W and the ring-shaped member W as shown in FIG. A gap (hereinafter referred to as reverse crowning amount δ1) is generated between the outer peripheral surfaces of the large rolling roller 12. More specifically, the reverse crowning amount δ1 is the distance between the outer peripheral surface of the ring-shaped member W and the outer peripheral surface of the large rolling roller 12 when the outer peripheral surface of the ring-shaped member W is in contact with the outer peripheral surface of the large rolling roller 12. The maximum gap amount. As described above, since the reverse crowning amount δ1 exists, the initial setting position of the small rolling roller 11 is set to a position where the reverse crowning amount δ1 is stacked with respect to the rough material plate thickness position on the basic track. Note that the reverse crowning amount δ1 is a very small amount of about several μm, but it should be noted that the reverse crowning amount δ1 is exaggerated in the explanation in FIG.

  Here, when rolling the ring-shaped member W while bringing the ring-shaped member W into contact with the large-rolling roller 12 and pressing the small-rolling roller 11 toward the large-rolling roller 12, the small-rolling roller 11 and the large-rolling roller 12 are used. Depending on the rigidity of each roller, the rigidity of the bearing attached to each roller, the material of the ring-shaped member W, etc., the pressing amount of the small rolling roller 11 is absorbed and the small rolling roller 11 is pressed against the ring-shaped member W. There is a risk that the amount will not be fully communicated. Therefore, the plate thickness of the ring-shaped member W may not reach the target value. Therefore, the position where the crushing amount in consideration of the rigidity of each roller, the rigidity of the bearing attached to each roller, the material of the ring-shaped member W, etc. is accumulated as the target position of the small rolling roller 11 further than the target plate thickness position. To do. This crushing amount is an amount determined based on the processing results, and in FIG. 6, δ2 corresponds to the crushing amount.

  In the finish rolling stage, the small rolling roller 11 is fixed at the target position, and the outer peripheral surface of the ring-shaped member W is uniformly finished over the entire circumference. Thereby, the effect that the plate | board thickness of the ring-shaped member W and the surface roughness of an outer peripheral surface become uniform over a perimeter is acquired.

  Thus, between the initial setting position where the reverse crowning amount δ1 is accumulated with respect to the rough material plate thickness position in the basic track, and the target position where the crushing amount δ2 is further accumulated from the target plate thickness position, The track connected by the cubic curve so as to follow the curve of the basic track is set as the actual track of the small rolling roller 11. In the present invention, the actual trajectory of the small-rolling roller 11 is realized while grasping the position of the small-rolling roller 11 in real time by the down-axis direction sensor 21.

  In consideration of the productivity of the ring-shaped member W, the time required for the rolling process (acceleration stage to circumference measurement stage) of the present invention is only a few seconds. Moreover, since it is necessary to make the surface roughness of the outer peripheral surface of the ring-shaped member W more uniform over the entire circumference, it is necessary to increase the number of rotations of the ring-shaped member W as much as possible. The rotation speed of W is several thousand times per minute (several thousand rpm). And under this condition, the thickness variation of the ring-shaped member W needs to be within a range of several μm over the entire circumference. Therefore, in order to secure the measurement point of the plate thickness of the ring-shaped member W as much as possible and to more accurately measure the plate thickness over the entire circumference of the ring-shaped member W, the sampling time of the rolling axial position sensor 21 is set. The thickness of the ring-shaped member W needs to be measured as many times as possible within a short period of time as short as possible. Therefore, as described above, the time required for the rolling process is only a few seconds, and the rotational speed of the ring-shaped member W satisfies the condition of several thousand rpm, so that the sampling time is several msec. It is desirable to use a roll-down axial position sensor 21.

  Next, the position of the large rolling roller 12 per time will be specifically described with reference to FIG. FIG. 7 shows the rotation speed of the large rolling roller 12 per hour by taking time on the horizontal axis and the rotation speed of the large rolling roller 12 on the vertical axis. In the rough rolling stage, the rolling force and the tensile force can be reduced as the number of turns of the large rolling roller 12 is increased. Therefore, the rotation speed of the large rolling roller 12 is determined so that the number of turns of the large rolling roller 12 is increased as much as possible. As a result of the verification, in this embodiment, the recommended number of revolutions of the large rolling roller 12 is 18 or more.

  Further, in the finish rolling stage, if the number of rotations of the large rolling roller 12 is too small, the surface roughness of the ring-shaped member W is deteriorated, and if it is too large, the end of the ring-shaped member W may be warped. Therefore, the finish rolling speed is determined so that an appropriate number of revolutions of the large rolling roller 12 can be obtained. As a result of the verification, in this embodiment, the recommended number of rotations of the large rolling roller 12 is 2 to 6 times.

  In the present invention, as described above, the rolling process is performed while the position of the small rolling roller 11 is detected in real time by the rolling axial position sensors 21 and 22. Therefore, even if the size of the ring-shaped member W is changed, if the initial setting position and the target position of the small rolling roller 11 are determined, the trajectory of the small rolling roller 11 between them is realized while adapting to the size of the ring-shaped member W. I can do it. Therefore, even if it is a ring-shaped member of different sizes, it is possible to easily roll the ring-shaped members of different sizes simply by resetting the movement of the small rolling roller.

  Further, when entering the rolling process, when the torque command is issued in the direction of the rolling down axis and the large support roller 14 is brought closer to the large rolling roller 12 side, the small rolling roller 11 is moved through the ring-shaped member W to the large rolling roller 12. The position where the movement of the small rolling roller 11 is stopped by contacting with is set as the initial setting position of the small rolling roller 11. By doing in this way, since it is not influenced by the rigidity and thermal expansion of a ball screw or a roller, disturbances other than a rolling process can be removed as much as possible. The above operation is shown in FIG. As shown in FIG. 9, the torque in the reduction axial direction is made constant at the timing when the change in the position of the small rolling roller 11 stops, and at the same time, the position of the small rolling roller 11 is detected and controlled by the reduction axial direction position sensor 21. Start rolling.

The following effects are acquired by the above examples.
(1) In the present invention, the ring-shaped member W is passed between the small rolling roller 11 and the large rolling roller 12 and pulled by the pulling roller 15 to reduce the shaft from the small rolling roller 11 to the large rolling roller 12. In the method of manufacturing a ring-shaped member having a rolling process of rolling the ring-shaped member W by applying a load in the axial direction, the data of the rolling axial position sensor 21 that detects the amount of movement of the small rolling roller 11 in the rolling axial direction is fed back. By doing this, since there is a rolling process in which the gap between the outer peripheral surface of the small rolling roller 11 and the outer peripheral surface of the large rolling roller 12 is calculated to control the plate thickness of the ring-shaped member W, the detected large rolling roller 12 Since the thickness of the ring-shaped member W is detected in real time by feeding back the gap amount between the outer diameter and the outer diameter of the small rolling roller 11, the thickness of the ring-shaped member W is changed over the entire circumference. Even if the ring-shaped member W has a different size, it is possible to easily roll the ring-shaped member W of a different size simply by resetting the movement of the small rolling roller 11. can get.

(2) According to the present invention, in the method for manufacturing a ring-shaped member described in (1), the circumference of the ring-shaped member is calculated by feeding back data of a tension axial direction position sensor that detects the movement amount of the tension roller. A finishing rolling stage for finishing the plate thickness of the ring-shaped member W to a target value with respect to the track of the small rolling roller 11 corresponding to the plate thickness of the ring-shaped member calculated from the circumferential length of the ring-shaped member. The trajectory of the small rolling roller 11 is corrected to a position where a crushing amount is added in consideration of the rigidity of the small rolling roller 11 and the large rolling roller 12, and the small rolling roller 11, the large rolling roller 12, and the tension roller are corrected. At the start of the acceleration stage that increases the rotational speed of 15, the amount of the rough material plate before rolling at the start of the acceleration stage from the outer peripheral surface of the large rolling roller 12 and the reverse of the outer peripheral surface of the large rolling roller 12 The small rolling roller 11 is set at an initial setting position which is a position where the total amount of the awning is separated, and in the finish rolling stage, the target position is a position obtained by adding the crushing amount from the target position of the small rolling roller 11. In addition to the effect described in (1), the circumferential length of the ring-shaped member W is detected in real time by feeding back the detected position of the tension roller 15. The circumference of each manufactured product can be made uniform, and in the finish rolling stage, the surface roughness of the outer peripheral surface is made uniform over the entire circumference by rotating the small rolling roller 11 while fixing the position of the small rolling roller 11. The effect that can be obtained.

(3) In the method for manufacturing a ring-shaped member according to (2), the initial setting position is a position where the small rolling roller 11 is brought close to the large rolling roller 12 and the small rolling roller 11 contacts the ring-shaped member. In addition to the effects described in (1) or (2), the influence of the rigid deformation or thermal expansion of the ring-shaped member W is removed, and the ring-shaped member W is spread over the entire circumference. An effect of making the plate thickness uniform can be obtained.

(4) In the present invention, in any one of the ring-shaped member manufacturing methods described in (1) to (3), the position of the small rolling roller 11 is determined by a reduction axial position sensor from the acceleration stage to the finish rolling stage. A ring-shaped member assembly stage that is a pre-process of the acceleration stage and a ring-shaped member removal stage that is a post-process of the finish rolling stage have a rolling process of detecting the position of the small rolling roller 11 by a servo motor. Therefore, in addition to the effects described in (1) to (3), the position of the small rolling roller 11 can be accurately detected, and the effect that the plate thickness can be made uniform over the entire circumference of the ring-shaped member W can be obtained. .

(5) In the present invention, the ring-shaped member W is passed between the small rolling roller 11 and the large rolling roller 12 and pulled by the pulling roller 15 to reduce the axis of the small rolling roller 11 to the axial center of the large rolling roller 12. In an apparatus for manufacturing a ring-shaped member having a rolling process of rolling the ring-shaped member W by applying a load in the axial direction, a reduction axial position sensor 21 for detecting the amount of movement of the small rolling roller 11 in the reduction axial direction, and the movement amount Is fed back to calculate the amount of clearance between the outer peripheral surface of the small rolling roller 11 and the outer peripheral surface of the large rolling roller 12 to control the plate thickness of the ring-shaped member W. By feeding back the gap amount between the outer diameter and the outer diameter of the small rolling roller 11, the thickness of the ring-shaped member W can be detected in real time to make the thickness uniform over the entire circumference of the ring-shaped member W. , The effect that can be easily rolled in the ring-shaped member W of size difference just be a ring-shaped member W of size difference again easily set the movement of the small rolling roller 11 is obtained.

In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning.

It is a top view of the rolling apparatus of this invention. It is a side view of the rolling apparatus of this invention. It is a side view of the part of the small rolling roller of this invention. In the rolling apparatus of this invention, it is a figure of the state which retracted the small support roller and the large support roller. It is a figure which shows the position of the tension | pulling roller with respect to a time axis. It is a figure which shows the position of the small rolling roller with respect to a time axis. It is a figure which shows the position of the large rolling roller with respect to a time axis. It is a figure which shows the reverse crowning shape of a large rolling roller. It is a figure which shows the relationship between a torque instruction | command and a small rolling roller. It is a top view of the rolling apparatus described in patent documents 1 and 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rolling apparatus 11 Small rolling roller 12 Large rolling roller 13 Small support roller 14 Large support roller 15 Pulling roller 21 Rolling axial direction position sensor 22 Pulling axial direction position sensor 23 Servo motor 24 Ball screw 25 Servo motor 26 Ball screw W Ring-shaped member

Claims (5)

While the ring-shaped member is passed between the first rolling roller and the second rolling roller and pulled by the pulling roller, a load is applied in the reduction axial direction from the axis of the first rolling roller to the axis of the second rolling roller to form a ring shape. In the method for producing a ring-shaped member having a rolling process for rolling the member,
By feeding back the data of the down-axis direction position sensor that detects the amount of movement of the first rolling roller in the down-axis direction, the amount of clearance between the outer peripheral surface of the first rolling roller and the outer peripheral surface of the second rolling roller is calculated. And a rolling process for controlling the plate thickness of the ring-shaped member. In the manufacturing method of the ring-shaped member according to claim 1,
The circumference of the ring-shaped member is calculated by feeding back the data of the tension axis direction position sensor that detects the movement amount of the tension roller,
The first rolling roller in a finishing rolling stage that finishes the plate thickness of the ring-shaped member to the target value with respect to the track of the first rolling roller corresponding to the plate thickness of the ring-shaped member calculated from the circumferential length of the ring-shaped member And correcting the trajectory of the first rolling roller to a position where the amount of crushing is added in consideration of the rigidity of the second rolling roller,
At the start of the acceleration stage that increases the rotation speed of the first rolling roller, the second rolling roller, and the tension roller, the amount of the rough material plate thickness before the rolling process at the start of the acceleration stage from the outer peripheral surface of the second rolling roller and the first The first rolling roller is set at an initial setting position that is a position separated from the total amount of reverse crowning on the outer peripheral surface of the two rolling rollers,
The finishing rolling stage has a rolling step of fixing the first rolling roller at a target setting position that is a position obtained by adding the crushing amount from a target position of the first rolling roller. Method. In the manufacturing method of the ring-shaped member according to claim 2,
A method for manufacturing a ring-shaped member, comprising: a rolling step in which the initial setting position is a position where the first rolling roller is brought close to the second rolling roller and the first rolling roller contacts the ring-shaped member. In the manufacturing method of any one ring member described in Claim 1 thru | or 3,
From the acceleration stage to the finish rolling stage, the position of the first rolling roller is detected by the reduction axial position sensor,
The ring-shaped member assembly stage, which is a pre-process of the acceleration stage, and the ring-shaped member removal stage, which is a post-process of the finish rolling stage, have a rolling process of detecting the position of the first rolling roller by a servo motor. Manufacturing method of ring member. While the ring-shaped member is passed between the first rolling roller and the second rolling roller and pulled by the pulling roller, a load is applied in the reduction axial direction from the axis of the first rolling roller to the axis of the second rolling roller to form a ring shape. In the manufacturing apparatus of a ring-shaped member having a rolling process for rolling the member,
A down-axis direction sensor that detects a movement amount of the first rolling roller in the down-axis direction;
A ring-shaped device having a control unit for controlling the plate thickness of the ring-shaped member by calculating the amount of clearance between the outer peripheral surface of the first rolling roller and the outer peripheral surface of the second rolling roller by feeding back the amount of movement. Manufacturing equipment for members.

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