JP2017124459A - Seal ring cutting device and cutting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seal ring cutting device and a cutting method enabled to form a seal fin tip having an excellent seal performance by a cutting work.SOLUTION: A seal ring cutting device comprises: a cutting tool for cutting the leading ends of the seal fins of a seal ring; a first guide disposed to abut against the reference plane of the seal ring for holding the position of the cutting tool with reference to the reference plane so that the angle of the leading end face of the cutting tool with respect to the axial direction of the seal ring may be a set angle; and a connection frame for supporting the cutting tool on the first guide.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a seal ring cutting apparatus and a cutting method used for cutting a tip of a seal fin of a seal ring.

  2. Description of the Related Art Conventionally, a configuration including a seal fin is known as a seal ring for sealing an annular gap between a stationary part and a rotating part. This type of seal ring is often used in rotating machines such as gas turbines and steam turbines, for example, and the tip of the seal fin is formed in an appropriate shape in order to ensure high sealing performance. Therefore, for example, when the seal fin tip is turned or burred due to the aging of the seal ring, the tip of the seal fin is corrected (corrected) by the cutting device.

  As a seal ring cutting device, for example, Patent Document 1 describes a seal fin tip correction processing tool in which a cutting blade is fixed to a holder. In this processing tool, the cutting blade has a V shape, and the tip of the seal fin is formed into a V shape by cutting the tip of the seal fin manually.

JP 2000-343314 A

By the way, in the seal ring including the seal fin, the angle of the seal fin tip with respect to the flow direction of the fluid passing through the annular gap affects the seal performance. Therefore, the seal fin tip is required to have an appropriate angle. For example, in a seal ring having a structure in which the seal fin is inclined with respect to the axial direction of the seal ring, the effect of the angle of the seal fin tip on the seal performance is greater, and the required accuracy of the seal fin tip angle is further increased. .
However, conventionally, no cutting technique that can satisfy such strict required accuracy has been disclosed. In particular, when cutting is performed manually as in Patent Document 1, it is difficult to perform cutting so as to maintain the angle of the seal fin tip with high accuracy over the entire circumference of the seal ring.

  In view of the above circumstances, at least some embodiments of the present invention provide a cutting device and a cutting method for a seal ring that can form a seal fin tip that can provide excellent sealing performance by cutting. And

(1) A sealing ring cutting device according to at least some embodiments of the present invention includes:
A cutting tool for cutting the tip of the seal fin of the seal ring;
The cutting tool is held in contact with the reference surface of the seal ring and holds the posture of the cutting tool with respect to the reference surface so that the angle of the tip surface of the cutting tool with respect to the axial direction of the seal ring becomes a set angle. A first guide for
A coupling frame for supporting the cutting tool on the first guide.

  The seal ring cutting device according to (1) includes a first guide provided so as to abut on a reference surface of the seal ring, and a cutting tool is supported on the first guide via a connecting frame. Yes. Further, the first guide is configured to maintain the posture of the cutting tool with reference to the reference surface of the seal ring so that the angle of the tip surface of the cutting tool with respect to the axial direction of the seal ring becomes a set angle. That is, when cutting the tip end of the seal fin along the circumferential direction of the seal ring, the angle of the tip end surface of the cutting tool with respect to the axial direction of the seal ring can always be maintained at the set angle by the first guide. Therefore, if the set angle of the tip surface of the cutting tool is set to an angle corresponding to the tip angle of the seal fin that provides excellent sealing performance, the sealing performance can be maintained high over the entire circumference of the seal ring. The seal fin can be cut. For example, if the set angle is set to 0 °, it is possible to achieve a finish that ensures the parallelism of the seal fin tip with respect to the axial direction of the seal ring over the entire circumference of the seal ring. Thus, according to the said structure, even if it is a manual work, a seal fin front-end | tip can be cut to an appropriate angle irrespective of a worker's skill.

(2) In some embodiments, in the configuration of (1) above,
The first guide is at least one end surface guide provided so as to be slidably contacted with at least one side wall of the seal ring as the reference surface.

  According to the configuration of (2) above, the side wall of the seal ring that is relatively easy to ensure a flat surface continuously extending in the circumferential direction is used as the reference surface with which the end surface guide (first guide) abuts. . Thereby, when cutting the seal ring, when the end surface guide moves in the circumferential direction along with the movement of the cutting tool, the end surface guide can be smoothly slid along the circumferential direction. Further, since the side wall of the seal ring has a relatively small distance from the tip (cutting surface) of the seal fin, the connecting frame can be shortened. In this case, the entire apparatus can be made compact.

(3) In some embodiments, in the configuration of (2) above,
The at least one end surface guide is a pair of end surface guides that are located on both sides in the axial direction so as to sandwich the seal ring, and are slidably abutted on both side walls of the seal ring.

  According to the configuration of (3) above, the pair of end surface guides (first guides) are slidably in contact with both side walls of the seal ring. Therefore, the posture of the cutting tool supported by the pair of end surface guides can be more accurately and stably held. The pair of end surface guides are arranged so as to sandwich the seal ring. Thereby, the position of the end surface guide in the axial direction of the seal ring can be fixed, and further, the axial position of the cutting tool supported by the end surface guide can also be determined.

(4) In some embodiments, in any one of the above configurations (1) to (3),
In the axial direction, it further includes a grip portion that is provided on the opposite side of the seal ring with the first guide interposed therebetween, and is fixed to the connection frame or the first guide.

  According to the configuration of (4) above, by providing the gripping portion fixed to the connecting frame or the first guide, the cutting device can be easily handled when manually cutting the seal ring, and the workability is improved. Can be made. In addition, since the grip portion is provided on the opposite side of the seal ring with the first guide interposed in the axial direction of the seal ring, the cutting device can be stably operated.

(5) In some embodiments, in the configuration of (4) above,
The tip of the seal fin faces the inner peripheral side of the seal ring,
The grip portion is positioned on the outer peripheral side of the cutting tool in the radial direction of the seal ring.

  According to the configuration of (5) above, the posture of the cutting device is adjusted when the gripping part is pressed toward the outer peripheral side of the seal ring so that the cutting tool comes into contact with the tip of the seal fin while the gripping part is gripped. It can be kept stable. That is, as compared with the case where the gripping part is located on the inner peripheral side of the seal ring with respect to the cutting tool, the tip of the cutting tool that attempts to tilt the cutting device due to the pressing force input to the gripping part is supported. (The moment in the plane including the axial direction and the radial direction of the seal fin) can be reduced.

(6) In some embodiments, in any one of the above configurations (1) to (5),
Inclination of the cutting tool relative to the radial direction of the seal ring by being able to move together with the cutting tool and contacting the tip of the seal fin at a position different from the cutting tool in the circumferential direction of the seal ring A second guide configured to hold the corner is further included.

  According to the configuration of (6) above, when cutting the tip of the seal fin, the cutting device contacts the tip of the seal fin at two points of the tip surface of the cutting tool and the second guide in the circumferential direction of the seal ring. Therefore, the angle of the cutting tool (cutlery angle) with respect to the cutting surface at the tip of the seal fin in the circumferential direction of the seal ring can be held over the entire circumference of the seal ring. Therefore, a uniform finish can be achieved in the cutting process of the tip of the seal fin.

(7) In some embodiments, in the configuration of (6) above,
The second guide includes a roller configured to run in the circumferential direction on the tip of the seal fin.

  According to the configuration of (7) above, since the roller of the second guide rolls and moves as the cutting tool moves in the circumferential direction of the seal ring when cutting the tip of the seal fin, The friction can be reduced. Therefore, the cutting device can be smoothly operated and the influence on the tip of the seal fin due to the contact of the second guide can be suppressed.

(8) In some embodiments, in the above configuration (6) or (7),
The second guide is made of resin.

  According to the configuration of (8) above, since the second guide is made of resin, it is possible to more effectively suppress the influence on the seal fin tip due to the contact of the second guide.

(9) In some embodiments, in any one of the above configurations (1) to (8),
An adjustment mechanism is further provided for adjusting the position of the cutting tool with respect to the connection frame in at least one of a radial direction and an axial direction of the seal ring.

  According to the configuration of (9) above, since the position of the cutting tool relative to the connecting frame can be adjusted, the axis of the cutting tool and the first guide (or second guide) is matched to the shape of the seal fin that is the cutting target. By adjusting the relative positional relationship in the direction or radial direction, the cutting tool can be held in an appropriate posture, and highly accurate cutting can be performed.

(10) In some embodiments, in any one of the above configurations (1) to (9),
The seal fin is inclined with respect to a radial direction of the seal ring.

  In the seal ring in which the seal fin is inclined with respect to the radial direction of the seal ring as in the configuration of (10) above, the influence of the angle of the seal fin tip on the seal performance is further increased. Therefore, by performing cutting using a cutting apparatus having any one of the above configurations (1) to (9), a seal fin tip having excellent sealing performance can be realized with certainty.

(11) In some embodiments, in any one of the above configurations (1) to (10),
In the seal ring, a plurality of the seal fins having different lengths in the radial direction of the seal ring are arranged in the axial direction.

  Even for a seal ring having a plurality of seal fins as in the configuration of (11) above, by using a cutting device having the configuration of any of (1) to (10) above, a plurality of seal fin tips are arranged. It can be cut to an appropriate angle. Further, when the adjusting mechanism described in (9) is provided, a plurality of seal fin tips can be easily cut by adjusting the position of the cutting tool in the radial direction and the axial direction of the seal ring. .

(13) A sealing ring cutting method according to at least some embodiments of the present invention includes:
A method of cutting a seal ring using a cutting device including a cutting tool, a first guide, and a connecting frame that supports the cutting tool on the first guide,
By bringing the first guide into contact with the reference surface of the seal ring so that the angle of the tip surface of the cutting tool with respect to the axial direction of the seal ring becomes a set angle, the cutting tool with reference to the reference surface The step of maintaining the posture of
Moving the cutting tool in the circumferential direction of the seal ring while keeping the first guide in contact with the reference surface, and cutting the end of the seal fin with the cutting tool.

  In the sealing ring cutting method of (13) above, the posture of the cutting tool is maintained with respect to the reference surface of the sealing ring so that the angle of the tip surface of the cutting tool with respect to the axial direction of the sealing ring becomes a set angle. The tip of the fin is cut. That is, when cutting the tip end of the seal fin along the circumferential direction of the seal ring, the angle of the tip end surface of the cutting tool with respect to the axial direction of the seal ring can always be maintained at the set angle by the first guide. Therefore, if the set angle of the tip surface of the cutting tool is set to an angle corresponding to the tip angle of the seal fin that provides excellent sealing performance, the sealing performance can be maintained high over the entire circumference of the seal ring. The seal fin can be cut.

(14) In some embodiments, in the method of (13) above,
A step of bringing the second guide into contact with a position different from the cutting tool in the circumferential direction of the seal ring to maintain an inclination angle of the cutting tool with respect to a radial direction of the seal ring;
In the step of cutting the tip of the seal fin, the second guide is moved in the circumferential direction together with the cutting tool and the first guide.

  According to the method of (14) above, the inclination angle of the cutting tool is maintained so as to come into contact with the seal fin tip at two points of the tip surface of the cutting tool and the second guide in the circumferential direction of the seal ring, and the tip of the seal fin Is supposed to cut. Therefore, the angle of the cutting tool (cutlery angle) with respect to the cutting surface at the tip of the seal fin in the circumferential direction of the seal ring can be held over the entire circumference of the seal ring. Therefore, if the tip surface of the cutting tool is set to an appropriate angle by the second guide, a uniform finish can be obtained in the cutting process of the tip of the seal fin.

(15) In some embodiments, in the above method (13) or (14),
The method further includes the step of adjusting the position of the cutting tool relative to the connection frame in at least one of a radial direction and an axial direction of the seal ring.

  According to the above method (15), since the position of the cutting tool relative to the connecting frame can be adjusted, the relative positional relationship between the cutting tool and the first guide (or the second guide) according to the structure of the seal ring. By adjusting the angle, the cutting tool can be held in an appropriate posture, and highly accurate cutting can be performed.

  According to at least some embodiments of the present invention, when cutting the tip of the seal fin along the circumferential direction of the seal ring, the first guide always sets the angle of the tip surface of the cutting tool with respect to the axial direction of the seal ring. It can be maintained at an angle. Therefore, if the set angle of the tip surface of the cutting tool is set to an angle corresponding to the tip angle of the seal fin that provides excellent sealing performance, the sealing performance can be maintained high over the entire circumference of the seal ring. The seal fin can be cut.

It is a front view of the cutting device of the seal ring concerning one embodiment. It is a side view of the sealing ring cutting device according to an embodiment (a view taken along the line AA in FIG. 1). It is a side view which shows the state at the time of cutting of the cutting device of the seal ring which concerns on one Embodiment. It is a perspective view which shows the state at the time of cutting of the cutting device of the seal ring which concerns on one Embodiment. It is a figure for demonstrating the adjustment mechanism of the cutting device of the seal ring which concerns on one Embodiment.

  Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described in the embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples. Absent.

First, with reference to FIGS. 1-4, the whole structure of the cutting device 1 (henceforth only the cutting device 1) of the seal ring which concerns on some embodiment is demonstrated roughly.
FIG. 1 is a front view of a cutting device 1 according to an embodiment. FIG. 2 is a side view of the sealing ring cutting device 1 according to an embodiment (a view taken along the line AA in FIG. 1). Drawing 3 is a side view showing the state at the time of cutting of cutting device 1 of the seal ring concerning one embodiment. FIG. 4 is a perspective view showing a state of the sealing ring cutting device 1 according to an embodiment during cutting.

  As illustrated in FIGS. 1 and 2, in some embodiments, the cutting device 1 includes a cutting tool (bite) 2, a first guide 4 for maintaining the posture of the cutting tool 2, and a cutting tool. 1, a connecting frame 6 for supporting the guide 4. The first guide 4 is provided so as to contact the reference surface 104 of the seal ring 100, and the reference surface 104 is set so that the angle of the distal end surface 2 a of the cutting tool 2 with respect to the axial direction of the seal ring 100 becomes a set angle. It is comprised so that the attitude | position of the cutting tool 2 may be hold | maintained on the basis of.

The cutting device 1 is a device for cutting the peripheral surface of the seal ring 100. That is, the cutting device 1 is configured to cut the tips 102 a of the seal fins 102 of the seal ring 100. In the embodiment shown in FIGS. 1 and 3, as an example, in the seal ring 100 in which the seal fin 102 is provided on the inner peripheral side, the tip 102 a (inner peripheral surface) of the seal fin 102 is cut by the cutting device 1. Shows about.
More specifically, the cutting device 1 may be a device that performs correction processing or correction processing for correcting, for example, turning-up or burr of the tip 102a of the seal fin 102 at the time of periodic inspection. However, the use of the cutting device 1 is not limited to correction processing or correction processing, and may be other uses such as finishing processing at the time of manufacture.
Moreover, the cutting device 1 may perform the cutting process of the seal ring used for rotary machines, such as a gas turbine and a steam turbine.

  Specifically, the cutting tool 2 is configured to cut the tips 102 a of the seal fins 102 of the seal ring 100. In the cutting tool 2 according to one embodiment, the shape of the tip end surface 2a of the cutting edge viewed from the cutting direction is linear. However, the cutting edge shape of the cutting tool 2 is not limited to this.

The first guide 4 is provided so as to contact the reference surface 104 of the seal ring 100, and the reference surface 104 is used as a reference so that the angle of the distal end surface 2a of the cutting tool 2 with respect to the axial direction of the seal ring 100 becomes a set angle. It is comprised so that the attitude | position of the cutting tool 2 may be hold | maintained. For example, the first guide 4 is configured to hold the posture of the cutting tool 2 with respect to the reference surface 104 so that the distal end surface 2 a of the cutting tool 2 is parallel to the axial direction of the seal ring 100. Alternatively, the first guide 4 may be configured to hold the posture of the cutting tool 2 with respect to the reference surface 104 so that the distal end surface 2a of the cutting tool 2 is inclined with respect to the axial direction of the seal ring 100. Good.
The reference surface 104 may be formed continuously in the circumferential direction of the seal ring 100.
In the embodiment illustrated in FIGS. 1 to 3, the reference surface 104 is a side wall of the seal ring 100.
In other embodiments not shown, the reference surface 104 may be the outer peripheral wall 106 (see FIG. 1) of the seal ring 100. In that case, for example, the cutting tool 2 may be held at a set angle by adjusting the distance between the cutting tool 2 and the outer peripheral wall 106 of the seal ring 100 at two points different in the axial direction.

  The connecting frame 6 is configured to support the cutting tool 2 on the first guide 4. That is, the connection frame 6 is configured to connect the first guide 4 and the cutting tool 2 directly or indirectly. In one embodiment, the connection frame 6 includes a first connection arm 7 connected to the grip portion 15 and a second connection arm 8 connected to the first connection arm 7 and to which the holder 5 is attached. The cutting tool 2 is attached to the holder 5.

According to the above-described embodiment, the cutting device 1 for the seal ring 100 includes the first guide 4 provided so as to abut on the reference surface 104 of the seal ring 100, and the connection frame 6 is attached to the first guide 4. The cutting tool 2 is supported via Further, the first guide 4 holds the posture of the cutting tool 2 with respect to the reference surface 104 of the seal ring 100 so that the angle of the distal end surface 2a of the cutting tool 2 with respect to the axial direction of the seal ring 100 becomes a set angle. It is configured as follows. That is, when cutting the front end of the seal fin 102 along the circumferential direction of the seal ring 100, the angle of the front end surface 2 a of the cutting tool 2 with respect to the axial direction of the seal ring 100 can always be maintained at a set angle by the first guide 4. Therefore, if the setting angle of the tip surface 2a of the cutting tool 2 is set to an angle corresponding to the tip angle of the seal fin capable of obtaining excellent sealing performance, the sealing performance can be maintained high over the entire circumference in the circumferential direction of the seal ring 100. Thus, the sealing fin 102 can be cut. For example, when the set angle is set to 0 °, it is possible to achieve a finish that ensures the parallelism of the tips 102 a of the seal fins 102 with respect to the axial direction of the seal ring 100 over the entire circumference of the seal ring 100. Thus, according to the above-described configuration, the tip 102a of the seal fin 102 can be cut at an appropriate angle regardless of the skill of the worker, even by manual work.
The set angle includes 0 ° (that is, an angle at which the tip surface 2a of the cutting tool 2 is parallel to the axial direction of the seal ring 100) and may be less than 90 °.

In one embodiment, the first guide 4 is at least one end surface guide provided so as to slidably contact at least one side wall of the seal ring 100 as the reference surface 104.
For example, the end surface guide 4 is attached to the connection frame 6 by a bolt 4a. Further, the end face guide 4 may be formed of a resin material from the viewpoint of improving the slidability with respect to the side wall of the seal ring 100. Furthermore, the end surface guide 4 may be detachable from the connecting frame 6 and may be replaced when worn due to aging.

  According to this configuration, as the reference surface 104 with which the end surface guide (first guide) 4 abuts, the side wall of the seal ring 100 that is relatively easy to ensure a flat surface continuously extending in the circumferential direction is used. Thereby, when the seal ring 100 is cut, the end surface guide 4 can be smoothly slid along the circumferential direction when the end surface guide 4 moves in the circumferential direction as the cutting tool 2 moves. Further, since the side wall of the seal ring 100 has a relatively small distance from the tip (cutting surface) of the seal fin, the connecting frame 6 can be shortened. In this case, the entire apparatus can be made compact.

  As shown in FIG. 1, in the above embodiment, at least one end surface guide 4 is positioned on both sides in the axial direction so as to sandwich the seal ring 100, and a pair of slidably abutting both side walls of the seal ring 100. The end face guide may be used.

  According to this configuration, the pair of end surface guides (first guides) 4 are slidably brought into contact with both side walls of the seal ring 100. Therefore, the posture of the cutting tool 2 supported by the pair of end surface guides 4 can be held more accurately and stably. Further, the pair of end surface guides 4 are arranged so as to sandwich the seal ring 100 therebetween. Thereby, the position of the end surface guide 4 in the axial direction of the seal ring 100 can be fixed, and furthermore, the axial position of the cutting tool 2 supported by the end surface guide 4 can also be determined.

As shown in FIG. 1, the length of the end face guide 4 in the radial direction of the seal ring 100 (hereinafter simply referred to as the radial direction) is larger than the length of the side wall (side wall height) of the seal ring 100 in the radial direction. It can be large.
Thereby, when moving the end surface guide 4 with the cutting tool 2 in the circumferential direction, it can suppress that the end surface guide 4 remove | deviates from the side wall of the seal ring 100. FIG.

  In addition to the above-described configuration, the cutting device 1 according to this embodiment may further include at least one of the configurations described below.

In the embodiment illustrated in FIGS. 1 and 3, the cutting device 1 is provided on the opposite side of the seal ring 100 across the first guide (end surface guide) 4 in the axial direction, and the connecting frame 6 or the first guide 4. It further includes a gripping portion 15 fixed to the head.
The gripping part 15 is a part for an operator to grip when performing cutting by hand using the cutting device 1. Various forces (for example, a radial component force that contributes to cutting and a circumferential component force that contributes to movement of the cutting device 1) are applied to the cutting device 1 via the grip portion 15. .

  According to the above configuration, by providing the grip portion 15 fixed to the connection frame 6 or the first guide 4, the cutting device 1 can be easily handled when the seal ring 100 is manually cut, and workability is improved. Can be improved. In addition, since the gripping portion 15 is provided on the opposite side of the seal ring 100 with the first guide 4 in the axial direction of the seal ring 100, the cutting device 1 can be stably operated.

As shown in FIGS. 3 and 4, when the tip 102 a of the seal fin 102 faces the inner peripheral side of the seal ring 100, the grip 15 is cut in the radial direction of the seal ring 100 as shown in FIG. 1. You may be located in the outer peripheral side rather than the tool 2. FIG.
According to this, the posture of the cutting device 1 can be stably maintained when the gripping portion 15 is pressed toward the outer peripheral side of the seal ring 100 so that the cutting tool 2 comes into contact with the tip 102a of the seal fin 102. it can. That is, as compared with the case where the gripping part 15 is positioned on the inner peripheral side of the seal ring 100 with respect to the cutting tool 2, the cutting device 1 is tilted due to the pressing force input to the gripping part 15. The moment (the moment in the plane including the axial direction and the radial direction of the seal fin 102) with the cutting tool tip as a fulcrum can be reduced.

As shown in FIGS. 2 to 4, the cutting apparatus 1 may further include a second guide 12 in addition to the first guide 4.
The second guide 12 is movable together with the cutting tool 2, and comes into contact with the tip 102 a of the seal fin 102 at a position different from the cutting tool 2 in the circumferential direction of the seal ring 100, thereby cutting the cutting tool 2 in the radial direction. The inclination angle θ (see FIG. 3) is maintained. For example, the second guide 12 is disposed in front of the cutting tool 2 in the moving direction B of the cutting tool 2 (see FIG. 3). That is, the second guide 12 is disposed so as to pass through the tip 102a before cutting. In addition, as shown in the figure, the inclination angle θ is an angle such that the upper part of the cutting tool 2 (on the holder 5 side) is positioned in front of the moving direction B from the lower part of the cutting tool 2 (on the seal fin 102 side). There may be. In other words, the cutting tool 2 is inclined such that the upper part (the holder 5 side) of the cutting tool 2 falls to the front side in the movement direction B with respect to the radial direction of the seal ring 100.

  According to the above embodiment, when cutting the tip end 102 a of the seal fin 102, the cutting device 1 uses the tip end surface 2 a of the cutting tool 2 and the tip end of the seal fin 102 at two points in the circumferential direction of the seal ring 100. 102a is contacted. Therefore, the angle (cutlery angle) of the cutting tool 2 with respect to the cutting surface at the tip of the seal fin in the circumferential direction of the seal ring 100 can be held over the entire circumference of the seal ring 100. Therefore, a uniform finish can be achieved in the cutting process of the tip 102a of the seal fin 102.

The second guide 12 may include a roller 12 configured to be able to travel in the circumferential direction on the tip 102 a of the seal fin 102.
As shown in FIG. 2, for example, the roller 12 is attached to the connection frame 6. Specifically, the connection frame 6 includes a third connection arm 9 extending from the second connection arm 8 in a direction orthogonal to the axial direction, one end connected to the third connection arm 9, and a roller 12 at the other end. A fourth connecting arm 10 to be supported. In this case, the fourth connection arm 10 on which the roller 12 is supported may be provided in parallel with the first connection arm 7.

  According to the above configuration, the roller 12 of the second guide 12 rolls and moves with the movement of the cutting tool 2 in the circumferential direction of the seal ring 100 when cutting the tip 102a of the seal fin 102. Friction with the tip 102a of the seal fin 102 can be reduced. Therefore, the cutting device 1 can be operated smoothly, and the influence of the second guide 12 on the seal fin tip can be suppressed.

The second guide 12 may be formed of a resin material.
Thus, by forming the second guide 12 from a resin material, it is possible to more effectively suppress the influence of the contact of the second guide 12 on the tip 102a of the seal fin 102. That is, it is possible to effectively prevent the second guide 12 from damaging the tip 102a of the seal fin 102.
For example, the second guide 12 may be made of a material such as polyamide (for example, nylon), polyacetal, polytetrafluoroethylene, polyphenylene sulfide, elastomer, polyolefin, thermosetting resin, or other super engineering plastics.
Moreover, the 2nd guide 12 may be formed with the resin material which has elasticity. As a result, the second guide 12 is slightly deformed along the front end 102a of the seal fin 102 while being pressed against the front end 102a of the seal fin 102, so that damage to the front end 102a can be more effectively suppressed.

As illustrated in FIGS. 1, 2, and 5, the cutting device 1 according to some embodiments is configured such that the position of the cutting tool 2 with respect to the connection frame 6 is set to at least one of the radial direction and the axial direction of the seal ring 100. You may further provide the adjustment mechanism 20 and 30 for adjusting.
For example, the cutting device 1 includes at least one of the axial direction adjustment mechanism 20 and the radial direction adjustment mechanism 24.
FIG. 5 is a view for explaining the adjusting mechanisms 20 and 24 of the seal ring cutting device 1 according to the embodiment.

The axial adjustment mechanism 20 is configured to adjust the axial position of the cutting tool 2 with respect to the connecting frame 6. Specifically, as illustrated in FIGS. 1 and 2, the third connection arm 9 is formed so as to surround the outer periphery of the second connection arm 8 at a connection portion 9 a with the second connection arm 8. . Further, the connecting portion 9 a of the third connecting arm 9 is configured to be slidable with respect to the second connecting arm 8. That is, the connecting portion 9 a of the third connecting arm 9 is configured to be slidable in the axial direction along the second connecting arm 8.
The holder 5 is attached to the connecting portion 9a of the third connecting arm 9, and is supported by the second connecting arm 8 through the connecting portion 9a. Therefore, when the third connecting arm 9 slides along the second connecting arm 8, the holder 5 and the cutting tool 2 attached to the holder 5 are the third connecting arm 9, the fourth connecting arm 10, and the roller. 12 and slide in the axial direction.
The butterfly bolt 21 penetrates the connecting portion 9 a of the third connecting arm 9, and the tip of the butterfly bolt 21 is pressed against the outer peripheral surface of the second connecting arm 8 by screwing the butterfly bolt 21. ing. As shown in FIGS. 5A and 5B, in this axial direction adjusting mechanism 20, the third connecting arm 9 and the cutting tool 2 are slid and moved while the butterfly bolt 21 is loosened, and the seal that is the object to be cut. When the cutting tool 2 reaches the axial position corresponding to the tip 102a of the fin 102, it stops. And the axial direction position of the cutting tool 2 can be fixed by screwing the butterfly bolt 21 in this position.

  The radial adjustment mechanism 24 is configured to adjust the radial position of the cutting tool 2 with respect to the connection frame 6. Specifically, as illustrated in FIGS. 1 and 2, the holder 5 is slidable in the radial direction with respect to the base 5 a connected to the second connecting arm 8 and the base 5 a, and the cutting tool 2. Includes a holding portion 5b attached to the tip, and a nut 5c capable of fixing the position of the holding portion 5b with respect to the base portion 5a. As shown in FIGS. 5A and 5B, in the radial direction adjusting mechanism 24, the holding portion 5b is slid in the radial direction with the nut 5c loosened, and the cutting tool 2 is moved in a predetermined radial direction. Stop when you reach the position. And the holding | maintenance part 5b is fixed to the base 5a by tightening the nut 5c in this position, and the radial direction position of the cutting tool 2 can be fixed.

  According to the above configuration, since the position of the cutting tool 2 with respect to the connecting frame 6 can be adjusted, the cutting tool 2 and the first guide N4 (or the second guide 12) are matched to the shape of the seal fin 102 to be cut. By adjusting the relative positional relationship in the axial direction or radial direction, the cutting tool 2 can be held in an appropriate posture, and highly accurate cutting can be performed.

The cutting device 1 may further include an inclination angle adjusting mechanism 30 for adjusting the inclination angle θ (see FIG. 3) of the cutting tool 2 with respect to the radial direction.
Specifically, as illustrated in FIGS. 1 and 2, the third connecting arm 9 and the fourth connecting arm 10 are connected by a butterfly bolt 31 penetrating them. The third connecting arm 9 is formed with a bolt hole corresponding to the shaft diameter of the butterfly bolt 31, while the fourth connecting arm 10 is formed with a long hole 32 along the radial direction. In the tilt angle adjusting mechanism 30, the second guide 12 is supported so that the tilt angle θ (see FIG. 3) of the cutting tool 2 with respect to the radial direction becomes a desired angle with the butterfly bolt 21 loosened. The length of the fourth connecting arm 10 is adjusted by sliding the fourth connecting arm 10 in the radial direction. Then, the position of the 4th connection arm 10 with respect to the 3rd connection arm 9 is fixed by screwing in butterfly bolt 31, and inclination-angle (theta) (refer FIG. 3) of the cutting tool 2 with respect to a radial direction can be fixed.

As illustrated in FIG. 1, in the seal ring 100 that is a cutting target of the cutting apparatus 1 described above, the seal fins 102 may be inclined with respect to the radial direction of the seal ring 100.
In the seal ring 100 in which the seal fin 102 is inclined with respect to the radial direction of the seal ring 100, the influence of the angle of the tip 102a of the seal fin 102 on the seal performance is further increased. Therefore, by performing cutting using the cutting device 1 described in the above embodiment, it is possible to reliably realize a seal fin tip having excellent sealing performance.
In this case, the seal ring 100 may have a plurality of seal fins 102 having different lengths in the radial direction of the seal ring 100 arranged in the axial direction.
Even for the seal ring 100 including the plurality of seal fins 102, the tip 102 a of the plurality of seal fins 102 can be cut at an appropriate angle by using the cutting apparatus 1 having the configuration of the above embodiment. Further, when the adjusting mechanisms 20 and 24 are provided, the tips 102a of the plurality of seal fins 102 are easily cut by adjusting the position of the cutting tool 2 in the radial direction and the axial direction of the seal ring 100. be able to.

Next, a method for cutting a seal ring according to some embodiments will be described. Here, description will be made by appropriately using the reference numerals shown in FIGS.
The sealing ring cutting method includes a posture holding step for holding the posture of the cutting tool 2, and a cutting step for cutting the tip 102 a of the seal fin 102 with the cutting tool 2.
In the posture holding step, the first guide 4 is brought into contact with the reference surface 104 of the seal ring 100 so that the angle of the distal end surface 2a of the cutting tool 2 with respect to the axial direction of the seal ring 100 becomes a set angle. The posture of the cutting tool 2 is held with reference to 104.
In the cutting step, the cutting tool 2 is moved in the circumferential direction of the seal ring 100 while the first guide 4 is in contact with the reference surface 104, and the tip 102 a of the seal fin 102 is cut by the cutting tool 2.

  The sealing ring cutting method maintains the posture of the cutting tool 2 with respect to the reference surface 104 of the seal ring 100 so that the angle of the tip surface 2a of the cutting tool 2 with respect to the axial direction of the seal ring 100 becomes a set angle. The tip 102a of the seal fin 102 is cut. That is, when cutting the front end 102a of the seal fin 102 along the circumferential direction of the seal ring 100, the angle of the front end surface 2a of the cutting tool 2 with respect to the axial direction of the seal ring 100 is always maintained at a set angle by the first guide 4. it can. Therefore, if the setting angle of the tip surface 2a of the cutting tool 2 is set to an angle corresponding to the tip angle of the seal fin capable of obtaining excellent sealing performance, the sealing performance can be maintained high over the entire circumference in the circumferential direction of the seal ring 100. Thus, the sealing fin 102 can be cut.

  In addition to the steps described above, the sealing ring cutting method may further selectively include the steps described below.

For example, the sealing ring cutting method further includes an inclination angle holding step for holding the inclination angle θ (see FIG. 3) of the cutting tool 2.
In the inclination angle holding step, the second guide 12 is brought into contact with a position different from the cutting tool 2 in the circumferential direction of the seal ring 100, and the inclination angle θ of the cutting tool 2 with respect to the radial direction of the seal ring 100 (see FIG. 3). Hold.
In this case, in the step of cutting the tip of the seal fin 102, the second guide 12 is moved in the circumferential direction together with the cutting tool 2 and the first guide 4.

  According to this method, the inclination angle θ of the cutting tool 2 is maintained so that the tip end surface 2a of the cutting tool 2 and the tip 102a of the seal fin 102 are in contact with each other at two points in the circumferential direction of the seal ring 100. The tip 102a of the seal fin 102 is cut. Therefore, the angle (cutlery angle) of the cutting tool 2 with respect to the cutting surface at the tip of the seal fin in the circumferential direction of the seal ring 100 can be held over the entire circumference of the seal ring 100. Therefore, if the tip surface 2a of the cutting tool 2 is set to an appropriate angle by the second guide 12, a uniform finish can be achieved in the cutting of the tip 102a of the seal fin 102.

The sealing ring cutting method may further include an adjusting step for adjusting the position of the cutting tool 2 with respect to the connecting frame 6.
The adjusting step adjusts the position of the cutting tool 2 with respect to the connecting frame 6 in at least one of the radial direction and the axial direction of the seal ring 100.

  According to this method, since the position of the cutting tool 2 with respect to the connection frame 6 can be adjusted, the cutting tool 2 and the first guide 4 (or the second guide 12) can be relative to each other according to the structure of the seal ring 100. By adjusting the positional relationship, the cutting tool 2 can be held in an appropriate posture, and highly accurate cutting can be performed.

  As described above, according to at least some embodiments of the present invention, when the tip 102a of the seal fin 102 is cut along the circumferential direction of the seal ring 100, the first guide 4 causes the axial direction of the seal ring 100 to be cut. The angle of the tip surface 2a of the cutting tool 2 with respect to the can always be maintained at the set angle. Therefore, if the setting angle of the tip surface 2a of the cutting tool 2 is set to an angle corresponding to the tip angle of the seal fin capable of obtaining excellent sealing performance, the sealing performance can be maintained high over the entire circumference in the circumferential direction of the seal ring 100. Thus, the sealing fin 102 can be cut.

  The present invention is not limited to the above-described embodiments, and includes forms obtained by modifying the above-described embodiments and forms obtained by appropriately combining these forms.

For example, expressions expressing relative or absolute arrangements such as “in a certain direction”, “along a certain direction”, “parallel”, “orthogonal”, “center”, “concentric” or “coaxial” are strictly In addition to such an arrangement, it is also possible to represent a state of relative displacement with an angle or a distance such that tolerance or the same function can be obtained.
For example, an expression indicating that things such as “identical”, “equal”, and “homogeneous” are in an equal state not only represents an exactly equal state, but also has a tolerance or a difference that can provide the same function. It also represents the existing state.
For example, expressions representing shapes such as quadrangular shapes and cylindrical shapes represent not only geometrically strict shapes such as quadrangular shapes and cylindrical shapes, but also irregularities and chamfers as long as the same effects can be obtained. A shape including a part or the like is also expressed.
On the other hand, the expression “comprising”, “including”, or “having” one constituent element is not an exclusive expression that excludes the presence of the other constituent elements.

DESCRIPTION OF SYMBOLS 1 Cutting device 2 Cutting tool 2a Front end surface 4 1st guide (end surface guide)
5 Holder 6 Connection frame 7 First connection arm 8 Second connection arm 9 Third connection arm 10 Fourth connection arm 12 Second guide (roller)
15 Grasping part 20 Axial adjustment mechanism 24 Radial adjustment mechanism 30 Inclination angle adjustment mechanism 100 Seal ring 102 Seal fin 102a Tip 104 Reference surface 106 Outer wall θ Inclination angle

Claims (15)

A cutting tool for cutting the tip of the seal fin of the seal ring;
The cutting tool is held in contact with the reference surface of the seal ring and holds the posture of the cutting tool with respect to the reference surface so that the angle of the tip surface of the cutting tool with respect to the axial direction of the seal ring becomes a set angle. A first guide for
And a connecting frame for supporting the cutting tool on the first guide.   2. The seal according to claim 1, wherein the first guide is at least one end surface guide provided so as to slidably contact with at least one side wall of the seal ring as the reference surface. Ring cutting device.   The at least one end surface guide is a pair of end surface guides that are located on both sides in the axial direction so as to sandwich the seal ring, and slidably contact both side walls of the seal ring. The sealing ring cutting device according to claim 2.   4. The apparatus according to claim 1, further comprising a grip portion provided on a side opposite to the seal ring across the first guide in the axial direction and fixed to the connection frame or the first guide. The sealing ring cutting device according to any one of the preceding claims. The tip of the seal fin faces the inner peripheral side of the seal ring,
The seal ring cutting device according to claim 4, wherein the grip portion is positioned on an outer peripheral side of the cutting tool in a radial direction of the seal ring.   Inclination of the cutting tool relative to the radial direction of the seal ring by being able to move together with the cutting tool and contacting the tip of the seal fin at a position different from the cutting tool in the circumferential direction of the seal ring The sealing ring cutting device according to claim 1, further comprising a second guide configured to hold a corner.   The seal ring cutting device according to claim 6, wherein the second guide includes a roller configured to run in the circumferential direction on the tip of the seal fin.   The sealing ring cutting device according to claim 6 or 7, wherein the second guide is made of resin.   The adjustment mechanism for adjusting the position of the cutting tool with respect to the connecting frame to at least one of the radial direction and the axial direction of the seal ring is further provided. The sealing ring cutting apparatus as described.   The seal ring cutting device according to any one of claims 1 to 9, wherein the seal fin is inclined with respect to a radial direction of the seal ring.   The seal ring according to any one of claims 1 to 10, wherein a plurality of the seal fins having different lengths in the radial direction of the seal ring are arranged in the axial direction. Cutting equipment. A method of cutting a seal ring using a cutting device including a cutting tool, a first guide, and a connecting frame that supports the cutting tool on the first guide,
By bringing the first guide into contact with the reference surface of the seal ring so that the angle of the tip surface of the cutting tool with respect to the axial direction of the seal ring becomes a set angle, the cutting tool with reference to the reference surface The step of maintaining the posture of
The cutting tool is moved in the circumferential direction of the seal ring while the first guide is in contact with the reference surface, and the tip of the seal fin is cut by the cutting tool. Seal ring cutting method. In the step of maintaining the posture of the cutting tool, the end surface guide as the first guide is brought into contact with each of both side walls of the seal ring from both sides in the axial direction so as to sandwich the seal ring,
The method of cutting a seal ring according to claim 12, wherein in the step of cutting the tip of the seal fin, the end surface guide is moved in the circumferential direction together with the cutting tool. A step of bringing the second guide into contact with a position different from the cutting tool in the circumferential direction of the seal ring to maintain an inclination angle of the cutting tool with respect to a radial direction of the seal ring;
The method for cutting a seal ring according to claim 12 or 13, wherein, in the step of cutting the tip of the seal fin, the second guide is moved in the circumferential direction together with the cutting tool and the first guide.   The seal according to any one of claims 12 to 14, further comprising a step of adjusting a position of the cutting tool with respect to the connection frame in at least one of a radial direction and an axial direction of the seal ring. Ring cutting method.

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