JP5842557B2 - Blade finishing method and blade parts - Google Patents

Description

  The present invention relates to a blade surface finishing method and the like for finishing a portion corresponding to a blade surface of a rough processed material to finish a portion corresponding to a blade surface of the material into a blade surface of a blade member.

  In general, a blade member used in a compressor or turbine of a gas turbine can be divided into a single blade component and a blade component member of an integral blade wheel (blisk). The blade surfaces of the blade component and the blade wheel constituent member as the blade member are usually finished by finishing the portion corresponding to the blade surface of the rough processed material as follows.

  As shown in FIGS. 5 (a) and 5 (b), with the end of the finishing end mill 10 facing the blade surface equivalent part P1 of the material W1, the finishing end mill 10 is rotated around its axis 10c, The finishing end mill 10 is given cutting feed in the axial direction thereof, and the finishing end mill 10 is moved relative to the material W1 along the outer peripheral direction of the blade surface equivalent portion P1 of the material W1, thereby completing the finishing. A finish portion is applied to the blade surface portion P1 of the material W1 by the shoulder at the tip of the end mill 10. Further, while giving a pitch feed in the span direction (longitudinal direction) of the blade surface corresponding portion P1 of the material W1 to the finishing end mill 10, the blade end corresponding to the blade surface corresponding to the blade surface P1 of the material W1 is performed a plurality of times. Repeat the finishing process. Thereby, the blade surface equivalent part P1 of the material W1 can be finished to the blade surface S1 of the blade component M1 as the blade member.

  Similarly, as shown in FIGS. 6 (a) and 6 (b), the finishing end mill 20 is axially centered in a state where the tip of the finishing end mill 20 is directed to the base end side of the blade surface equivalent portion P2 of the material W2. While rotating around 20c, the finishing end mill 20 is fed in the radial direction, and the finishing end mill 20 is fed relative to the material W2 along the outer peripheral direction of the blade surface portion P2 of the material W2. By moving, the blade end portion P2 of the material W2 is finished by the shoulder at the tip of the finishing end mill 20. Further, while giving a pitch feed in the span direction of the blade surface equivalent portion P2 of the material W2 to the finishing end mill 10, it is repeated a plurality of times on the outer peripheral portion of the blade surface equivalent portion P2 of the material W2 by the shoulder at the tip of the finishing end mill 20. Finish. Thereby, the blade surface equivalent part P2 of the material W2 can be finished to the blade surface S2 of the impeller component member M2 as the blade member.

  In addition, there exist some which are shown to patent document 1 and patent document 2 as a prior art relevant to this invention.

JP 2000-233310 A Japanese Patent No. 4183058

  By the way, in recent years, by reducing the contact length between the material and the end mill by reducing the diameter of the end mill, an attempt to increase the cutting speed of the end mill while suppressing an excessive temperature rise in the end mill, in other words, high speed Attempts have been made to apply cutting techniques. On the other hand, when high speed cutting technology is applied to improve the productivity of the blade surface S1 (S2) of the blade member M1 (M2), the cutting speed of the small-end finishing end mill 10A (20A) is increased. The relative feed movement speed of the finishing end mill 10A (20A) is increased, and in the vicinity of the front edge portion P1a (P2a) or the rear edge portion P1t (P2t) of the blade surface equivalent portion P1 (P2) of the material W1 (W2), The relative speed of the finishing end mill 10A (20A) decreases due to the deceleration for changing the direction, and the relative feed amount per blade of the finishing end mill 10A (20A) decreases. Therefore, the friction between the finishing end mill 10A (20A) and the raw material W1 (W2) is likely to generate large frictional heat in the finishing end mill 10A (20A), which reduces the durability of the finishing end mill 10A (20A). Invite. That is, there is a problem that it is difficult to maintain the durability of the finishing end mill 10A (20A) while improving the finishing productivity of the blade surface S1 (S2) of the blade member M1 (M2).

  Accordingly, an object of the present invention is to provide a blade surface finishing method having a novel configuration that can solve the above-described problems.

An aspect of the present invention provides a finishing end mill in a blade surface finishing method for finishing a portion corresponding to a blade surface of a rough processed material to finish the portion corresponding to the blade surface of the material to a blade surface of a blade member. The finishing end mill is fed relative to the material along the front edge portion of the blade corresponding to the blade surface. by moved, subjected to finishing the leading edge of the blade surface equivalent portion of the material, finish the leading edge of the blade surface equivalent portion of the material to the leading edge of the blade surface of the blade member In addition, while turning the finishing end mill around its axis, the cutting end mill is fed to the finishing end mill, and the finishing end mill is applied to the material along the rear edge of the material corresponding to the blade surface. Then, the rear edge portion corresponding to the blade surface portion of the material is subjected to a finishing process, and the rear edge portion corresponding to the blade surface portion of the material is moved to the blade surface of the blade member. A first finishing step of finishing the trailing edge of the material, and a cutting feed to the finishing end mill while rotating the finishing end mill around its axis, thereby causing the finishing end mill to correspond to the blade surface portion of the material. By finishing and moving relative to the material along one of the abdomen and the back from the front edge side or the rear edge side of the material, only the one of the parts corresponding to the blade surface is finished. And after finishing the second finishing step, the finishing end mill is rotated about its axis after the second finishing step to separate the finishing end mill from the portion corresponding to the blade surface of the material. A cutting feed is given to the finishing end mill, and the finishing end mill is applied to the material along the other of the abdomen and the back from the rear edge side or the front edge side of the wing surface equivalent portion of the material. A third finishing step of performing a finishing process only on the other side of the blade surface equivalent part of the material by moving it relatively, and separating the finishing end mill from the blade surface equivalent part of the material; After completion of the third finishing step, the second finishing step and the third finishing step are alternately repeated while giving the finishing end mill a pitch feed in the span direction of the portion corresponding to the blade surface of the material. And a fourth finishing step of finishing the abdomen and back of the material corresponding to the blade surface of the material into the abdomen and back of the blade surface of the wing member. The

  In addition, the span direction of the said blade surface equivalent site | part of the said material means the direction which goes to the base end from the front-end | tip of the said blade surface equivalent site | part of the said material.

According to the aspect of the present invention, after finishing the front edge and the rear edge of the wing surface of the wing member and finishing the abdomen and the back part in separate steps, the abdomen of the material corresponding to the wing surface and Each of the back portions is finished to separate the finishing end mill from the portion corresponding to the blade surface of the material. Accordingly, as the cutting speed of the finishing end mill is increased, the relative feed of the finishing end mill is increased. Even if the moving speed is increased, the deceleration for changing the direction of the finishing end mill is reduced in the vicinity of the front edge portion and the rear edge portion of the portion corresponding to the blade surface of the material, so that 1 of the finishing end mill is reduced. A decrease in the relative feed amount per blade can be suppressed.

  According to the present invention, even if the relative feed movement speed of the finishing end mill increases as the cutting speed of the finishing end mill increases, the vicinity of or behind the front edge of the portion corresponding to the blade surface of the material. Since it is possible to suppress a decrease in the relative feed amount per blade of the finishing end mill in the vicinity of the edge, the finishing end mill and the material are improved while improving the finishing productivity of the blade surface of the blade member. It is possible to maintain the durability of the finishing end mill by suppressing the generation of large frictional heat.

Fig.1 (a) is a schematic diagram explaining the 1st finishing process in the blade surface finishing method which concerns on 1st Embodiment of this invention, Comprising: Finishing processing is carried out to the front edge part and rear edge part of a blade surface equivalent site | part. 1 (b) is a view taken along line IB-IB in FIG. 1 (a). Fig.2 (a) is a schematic diagram explaining the 2nd finishing process and the 3rd finishing process in the blade surface finishing method which concerns on 1st Embodiment of this invention, Comprising: Finishing abdominal part and back part of a blade surface equivalent site | part FIG. 2 (b) is a view taken along line IIB-IIB in FIG. 2 (a). FIG. 3A is a schematic diagram for explaining the first finishing step in the blade surface finishing method according to the second embodiment of the present invention, and finishes the front edge portion and the rear edge portion of the blade surface equivalent portion. 3 (b) is a view taken along line IIIB-IIIB in FIG. 3 (a). FIG. 4A is a schematic diagram for explaining the second finishing step and the third finishing step in the blade surface finishing method according to the second embodiment of the present invention, and finishes the abdomen and back of the blade surface equivalent portion. FIG. 4B is a view taken along line IVB-IVB in FIG. FIG. 5A is a schematic diagram for explaining a conventional method of finishing a material corresponding to a blade surface (including a leading edge portion and a trailing edge portion) on a blade surface of a blade component, and FIG. It is the figure along the VB-VB line in (a). FIG. 6A is a schematic diagram for explaining a conventional technique for finishing a blade surface equivalent portion (including a front edge portion and a rear edge portion) of a material to a blade surface of an impeller constituent member, and FIG. It is the figure along the VIB-VIB line | wire in Fig.6 (a).

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the blade surface finishing method according to the first embodiment of the present invention is a blade surface equivalent portion P1 of a rough-processed material W1 set on a work jig (not shown) of a machining center. Is finished to give a blade surface equivalent portion P1 of the material W1 to a blade surface S1 of a blade component M1 as a blade member. Further, in the blade surface finishing method according to the first embodiment of the present invention, a plurality (three in the first embodiment) of sections L1A from the front end to the base end of the blade surface equivalent portion P1 of the material W1. , L1B, L1C, and the first finishing step (1-1), the second finishing step (1-2), the third finishing step (1-3), and the fourth for the plurality of sections L1A, L1B, L1C. A series of steps including the finishing step (1-4) is sequentially executed from the front end side. In addition, in the figure, a mode that each process is performed about the area L1B is shown.

  For the blade surface finishing method according to the first embodiment of the present invention, a finishing end mill 30 mounted on a spindle (not shown) of a machining center and having a smaller diameter than the outer diameter of the finishing end mill 10 (see FIG. 6) is used. Used. Here, the finishing end mill 30 is rotated around the axis 30c by driving a rotary motor (not shown) of the machining center, and is moved relative to the material W1 in the feed movement axis direction and the feed rotation axis direction. Control and feed rotation control are performed. In the first embodiment, the finishing end mill 30 is a radius end mill, but may be a ball end mill. In the first embodiment, the feed movement axis direction is an X-axis direction, a Y-axis direction, and a Z-axis direction orthogonal to each other, and the feed rotation axis direction is an axis parallel to the Y-axis direction. It is the A-axis direction that rotates around the center, and the B-axis direction that rotates around the axis parallel to the X-axis direction.

  Then, the specific content of each process in the blade surface finishing method which concerns on 1st Embodiment of this invention is demonstrated.

First finishing process (1-1)
As shown in FIGS. 1A and 1B, the rotary motor is driven, and the finishing end mill 30 is controlled to feed and control the feed W in the feed movement axis direction and the feed rotation axis direction. In the state where the axis 30c of the finishing end mill 30 intersects the span direction of the blade surface equivalent portion P1 of the material W1, the finishing end mill 30 is rotated around the axis 30c while the finishing end mill 30 is rotated. The cutting feed in the radial direction is given, and the finishing end mill 30 is repeated a plurality of times to move the feed relative to the material W1 along the front edge portion P1a of the blade surface equivalent portion P1 of the material W1. Thus, for each section L1A (L1B, L1C), the outer peripheral portion (outer peripheral blade) of the finishing end mill 30 is used to finish the front edge portion P1a of the blade surface equivalent portion P1 of the material W1, and the blade of the material W1 The front edge portion P1a of the surface equivalent portion P1 can be finished to the front edge portion S1a of the blade surface S1 of the blade component M1.

  Similarly, as shown in FIGS. 1 (a) and 1 (b), in the state where the axis 30c of the finishing end mill 30 intersects the span direction of the blade surface equivalent portion P1 of the material W1, the finishing end mill 30 is While rotating around the shaft center 30c, the finishing end mill 30 is given a radial cutting feed, and the finishing end mill 30 is repeated a plurality of times along the rear edge portion P1t of the blade surface equivalent portion P1 of the material W1. The feed is moved relative to the material W1. As a result, for each section L1A (L1B, L1C), the rear edge portion P1t of the blade surface equivalent portion P1 of the material W1 is finished by the outer peripheral portion of the finishing end mill 30, and the blade surface equivalent portion P1 of the material W1. The trailing edge P1t can be finished to the trailing edge S1t of the blade surface S1 of the blade part M1.

Second finishing process (1-2)
After completion of the first finishing step (1-1), as shown in FIGS. 2A and 2B, the rotary motor is driven and the finishing end mill 30 is moved in the feed movement axis direction and the feed rotation axis direction. With the feed movement control and feed rotation control, the finishing end mill 30 is rotated about its axis 30c with the tip of the finishing end mill 30 facing the blade surface equivalent portion P1 of the material W1. Then, the cutting end mill 30 is fed in the axial direction, and the finishing end mill 30 is made from the front edge portion P1a side (or the rear edge portion P1t side) of the blade surface equivalent portion P1 of the material W1 along the abdomen P1v. Feed and move relative to W1. Thus, for each section L1A (L1B, L1C), only the abdomen P1v of the portion P1 corresponding to the blade surface of the material W1 is finished by the shoulder at the tip of the finishing end mill 30, and the finishing end mill 30 is made the material W1. Can be separated from the wing surface equivalent part P1.

Third finishing process (1-3)
After completion of the second finishing step (1-2), as shown in FIGS. 2A and 2B, the rotary motor is driven and the finishing end mill 30 is moved in the feed movement axis direction and the feed rotation axis direction. With the feed movement control and feed rotation control, the finishing end mill 30 is rotated about its axis 30c with the tip of the finishing end mill 30 facing the blade surface equivalent portion P1 of the material W1. The finishing end mill 30 is cut in the axial direction thereof, and the finishing end mill 30 is moved from the rear edge P1t side (or front edge P1a side) of the blade W equivalent portion P1 of the material W1 along the back portion P1b. Feed and move relative to W1. Thus, for each section L1A (L1B, L1C), only the back portion P1b of the blade surface equivalent portion P1 of the material W1 is finished by the shoulder at the tip of the finishing end mill 30, and the finishing end mill 30 is made the material W1. Can be separated from the wing surface equivalent part P1.

Fourth finishing process (1-4)
After the completion of the third finishing step (1-3), the rotary motor is driven, and the finishing end mill 30 is controlled to feed and control the feed W in the feed movement axis direction and the feed rotation axis direction. The second finishing step (1-2) and the third finishing step (1-3) are performed while giving a pitch feed in the span direction (longitudinal direction) of the blade surface equivalent portion P1 of the material W1 to the finishing end mill 30. Repeat alternately. Thereby, for each section L1A (L1B, L1C), the abdomen P1v and the back part P1b of the wing surface equivalent part P1 of the material W1 can be finished into the abdomen S1v and the back part S1b of the wing surface S1 of the wing part M1.

  In the second finishing step (1-2), the abdomen P1v of the wing surface equivalent portion P1 of the material W1 is finished, and in the third finishing step (1-3), the back portion P1b of the wing surface equivalent portion P1 of the material W1. In the second finishing step (1-2), the back part P1b of the wing surface equivalent part P1 of the material W1 is finished in the second finishing step (1-2), and the blade surface of the material W1 in the third finishing step (1-3). The abdomen P1v of the corresponding part P1 may be finished.

  Then, the effect | action and effect of 1st Embodiment of this invention are demonstrated.

  After finishing the front edge S1a and the rear edge S1t on the blade surface S1 of the wing part M1 and finishing the abdomen S1v and back S1b in separate steps, the abdomen P1v and back P1b of the wing surface equivalent part P1 of the material W1. Since the finishing end mill 30 is separated from the blade surface equivalent part P1 of the material W1, the relative feed movement of the finishing end mill 30 is increased as the cutting speed of the finishing end mill 30 is increased. Even if the speed is increased, the deceleration for changing the direction of the finishing end mill 30 is reduced in the vicinity of the front edge portion P1a and the rear edge portion P2t of the blade surface corresponding portion P1 of the material W1, and the finishing end mill 30 A decrease in the relative feed amount per blade can be suppressed.

  Further, the material W1 is divided into a plurality of sections L1A, L1B, and L1C from the leading end to the base end of the blade surface equivalent portion P1, and the first finishing step (1-1) and the first finishing step are performed for each section L1A (L1B, L1C). Since a series of processes consisting of 2 finishing process (1-2), 3rd finishing process (1-3) and 4th finishing process (1-4) is executed, it corresponds to the blade surface of material W1. During the finishing process of the part P1, it is possible to prevent the rigidity of the part P1 corresponding to the blade surface of the material W1 from rapidly decreasing.

  Therefore, according to the first embodiment of the present invention, even if the relative feed movement speed of the finishing end mill 30 increases as the cutting speed of the finishing end mill 30 increases, the blade surface equivalent portion P1 of the material W1. In the vicinity of the front edge portion P1a and the rear edge portion P1t, a decrease in the relative feed amount per blade of the finishing end mill 30 can be suppressed, so that the productivity of finishing of the blade surface S1 of the blade part M1 is improved. However, it is possible to maintain the durability of the finishing end mill 30 by suppressing the generation of large frictional heat between the finishing end mill 30 and the material W1.

  Further, since the rigidity of the blade surface equivalent portion P1 of the material W1 can be prevented from suddenly decreasing during the finishing process of the blade surface equivalent portion P1 of the material W1, the chatter of the material W1 is reduced, The finishing accuracy of the blade surface S1 of the blade component M1 can be improved.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIGS.

  As shown in FIGS. 3 and 4, the blade surface finishing method according to the second embodiment of the present invention is a blade surface equivalent portion P2 of a rough-processed material W2 set on a work jig (not shown) of a machining center. Is subjected to finishing processing to finish the blade surface equivalent portion P2 of the material W2 to the blade surface S2 of the impeller constituent member M2 as the blade member. Further, in the blade surface finishing method according to the second embodiment of the present invention, a plurality (three in the second embodiment) of sections L2A from the front end to the base end of the blade surface equivalent portion P2 of the material W2. , L2B, L2C, and for the plurality of sections L2A, L2B, L2C, the first finishing process (2-1), the second finishing process (2-2), the third finishing process (2-3), and the fourth A series of steps including the finishing step (2-4) is sequentially executed from the front end side. In the figure, a state is shown in which each process is executed for the section L2B.

  For the blade surface finishing method according to the second embodiment of the present invention, a finishing end mill 40 mounted on a spindle (not shown) of a machining center and having a smaller diameter than the outer diameter of the finishing end mill 20 (see FIG. 6) is used. Used. In the second embodiment, the finishing end mill 40 is a radius end mill, but may be a ball end mill. Here, the finishing end mill 40 is rotated around the axis 40c by driving of a rotating motor (not shown) of the machining center, and is in a feed movement axis direction (X axis direction, Y axis direction, Z axis direction) and feed rotation. Feed movement control and feed rotation control are performed relative to the material W2 in the axial direction (A-axis direction, B-axis direction).

  Then, the specific content of each process in the blade surface finishing method which concerns on 2nd Embodiment of this invention is demonstrated.

First finishing process (2-1)
As shown in FIGS. 3A and 3B, the first finishing step (2-1) is executed in the same manner as the first finishing step (1-1) in the blade surface finishing method according to the first embodiment of the present invention. Thus, for each section L2A (L2B, L2C) of the blade surface equivalent portion P2 of the material W2, the front edge portion P2a of the blade surface equivalent portion P2 of the material W2 by the outer peripheral portion (outer peripheral blade) of the finishing end mill 40 and Finishing the rear edge portion P2t, the front edge portion P2a and the rear edge portion P2t of the blade surface equivalent portion P2 of the material W2 are formed on the front edge portion S2a and the rear edge portion S2t of the blade surface S2 of the impeller component M2. Can be finished.

Second finishing process (2-2)
After completion of the first finishing step (2-1), as shown in FIGS. 4A and 4B, the rotary motor is driven and the finishing end mill 40 is moved in the feed movement axis direction and the feed rotation axis direction. By controlling the feed movement and feed rotation, the end of the finishing end mill 40 is directed to the base end side of the blade surface equivalent portion P2 of the material W2 (in other words, the finishing end mill 40 is moved to the material W2. ), A cutting feed in the radial direction is given to the finishing end mill 40, and the finishing end mill 40 is moved to the front edge portion P2a side (or the rear side) of the blade surface corresponding portion P2 of the material W2. It is fed and moved relative to the material W2 along the abdomen P2v from the edge P2t side). Thus, for each section L2A (L2B, L2C) of the blade surface equivalent portion P2 of the material W2, only the abdomen P2v of the blade surface equivalent portion P2 of the material W2 is finished by the shoulder at the tip of the finishing end mill 40. Thus, the finishing end mill 40 can be separated from the blade surface equivalent portion P2 of the material W2.

  The reason why the end of the finishing end mill 40 is directed to the base end side of the blade surface equivalent part P2 of the material W2 is that the finishing end mill 40 is adjacent to the blade surface equivalent part P2 being finished. This is to prevent interference with the blade surface equivalent part P2.

Third finishing process (1-3)
After completion of the second finishing step (1-2), as shown in FIGS. 4A and 4B, the rotary motor is driven and the finishing end mill 40 is moved in the feed movement axis direction and the feed rotation axis direction. With the feed movement control and feed rotation control, the finishing end mill 40 is oriented in the radial direction in the finishing end mill 40 in a state where the tip of the finishing end mill 40 is directed to the base end side of the blade surface equivalent portion P2 of the material W2. The feed end mill 40 is fed and moved relative to the material W2 along the back portion P2b from the rear edge portion P2t side (or the front edge portion P2a side) of the blade surface equivalent portion P2 of the material W2. Thus, for each section L2A (L2B, L2C) of the blade surface equivalent portion P2 of the material W2, only the back portion P2b of the blade surface equivalent portion P2 of the material W2 is finished by the shoulder at the tip of the finishing end mill 40. Thus, the finishing end mill 40 can be separated from the blade surface equivalent portion P2 of the material W2.

  In the second finishing step (2-2), the abdomen P2v of the wing surface equivalent portion P2 of the material W2 is finished, and in the third finishing step (1-3), the back portion P2b of the wing surface equivalent portion P2 of the material W2. In the second finishing step (2-2), the back portion P2b of the blade W equivalent part P2 of the material W2 is finished in the second finishing step (2-2), and the blade surface of the material W2 in the third finishing step (1-3). The abdomen P2v of the corresponding part P2 may be finished.

Fourth finishing process (2-4)
After the completion of the third finishing step (2-3), the rotary motor is driven, and the finishing end mill 40 is controlled to feed and control the feed W in the feed movement axis direction and the feed rotation axis direction. The second finishing step (2-2) and the third finishing step (2-3) are alternately repeated while giving the finishing end mill 40 a pitch feed in the span direction of the material W2. Thus, for each section L2A (L2B, L2C) of the blade surface equivalent portion P2 of the material W2, the abdomen P2v and the back portion P2b of the blade surface equivalent portion P2 of the material W2 are replaced with the abdomen S2v of the blade surface S2 of the impeller component M2. And it can be finished to the back S2b.

  Then, the effect | action and effect of 2nd Embodiment of this invention are demonstrated.

  After finishing the front edge S2a and the rear edge S2t on the blade surface S2 of the impeller component M2 and finishing the abdomen S2v and back S2b in separate steps, the abdomen P2v and the abdomen P2v of the wing surface equivalent part P2 of the material W2 Each finishing portion is finished on the back portion P2b, and the finishing end mill 40 is separated from the blade surface equivalent portion P2 of the material W2. Therefore, as the cutting speed of the finishing end mill 40 increases, the relative speed of the finishing end mill 40 increases. Even if the feed movement speed is increased, the finishing end mill is reduced by reducing the deceleration for changing the direction of the finishing end mill 40 in the vicinity of the front edge portion P2a and the rear edge portion P2t of the blade surface equivalent portion P2 of the material W2. A decrease in the relative feed amount per 40 blades can be suppressed.

  Further, the material W2 is divided into a plurality of sections L2A, L2B, and L2C from the leading end to the base end of the blade surface equivalent portion P2, and the first finishing step (1-1) and the first finishing step are performed for each section L2A (L2B, L2C). Since a series of processes consisting of 2 finishing process (1-2), 3rd finishing process (1-3), and 4th finishing process (1-4) is executed, it corresponds to the blade surface of material W2. During the finishing process of the part P2, it is possible to suppress a sudden decrease in the rigidity of the part P2 corresponding to the blade surface of the material W2.

  Therefore, according to 2nd Embodiment of this invention, there exists an effect similar to 1st Embodiment of the above-mentioned this invention.

  In addition, this invention is not restricted to description of the above-mentioned embodiment, It can implement in a various aspect. Further, the scope of rights included in the present invention is finished by the blade surface finishing method according to the second embodiment of the present invention and the blade part M1 finished by the blade surface finishing method according to the first embodiment of the present invention. It extends to blade members such as the impeller component M2.

10 Finishing end mill 10c Finishing end mill axis 10A Small diameter finishing end mill 20 Finishing end mill 20c Finishing end mill axis 20A Small diameter finishing end mill 30 Finishing end mill 30c Finishing end mill axis 40 Finishing end mill 40c Axis of finishing end mill W1 Material P1 Blade surface equivalent part P1a Front edge part of blade surface equivalent part P1t Rear edge part of blade surface equivalent part P1b Back part of blade surface equivalent part P1v Abdominal part of blade surface equivalent part M1 Blade part S1 Blade surface S1a Front edge portion of blade surface S1t Rear edge portion of blade surface S1b Back portion of blade surface S1v Abdominal portion of blade surface W2 Material P2 Blade surface equivalent portion P2a Front edge portion of blade surface equivalent portion P2t Rear edge of blade surface equivalent portion Part P2b Back part corresponding to blade surface part P2v Abdominal part corresponding to blade surface part M2 blade wheel component S2 blade Abdomen back S2v blade surface of the edge S2b wing plane of the front edge S2t blade surface of the blade surface S2a

Claims (2)

In the wing surface finishing method for finishing the wing surface equivalent part of the material that has been roughly processed, and finishing the wing surface equivalent part of the material to the wing surface of the wing member,
While turning the finishing end mill around its axis, a cutting feed is given to the finishing end mill so that the finishing end mill is relative to the material along the front edge portion of the blade surface corresponding portion of the material. by specifically the feed movement, is subjected to finishing the leading edge of the blade surface equivalent portion of the material, the leading edge of the leading edge of the blade surface equivalent portion of the material the blade surface of the blade member with finish section, the while the finishing end mill rotates its axis around the given finishing end mill cuts feed, the finishing end mill along the trailing edge of the airfoil surface equivalent portion of the material By feeding and moving relative to the material, a finishing process is performed on a rear edge portion of the material corresponding to the blade surface, and a rear edge portion of the material corresponding to the blade surface is disposed on the blade member. Above A first finishing step for finishing the trailing edge of the surface,
While rotating the finishing end mill around its axis, the finishing end mill is fed into the finishing end mill so that the finishing end mill is abdominal from the front edge side or the rear edge side of the portion corresponding to the blade surface of the material. And moving the sheet relative to the material along one of the back portions to finish only the one of the blade-corresponding portions of the material, and the finishing end mill is made of the material. A second finishing step for separating from the portion corresponding to the blade surface;
After the end of the second finishing step, the finishing end mill is rotated around its axial center, and a cutting feed is given to the finishing end mill to cause the finishing end mill to have a trailing edge corresponding to the blade surface portion of the material. By feeding and moving relative to the material along the other of the abdomen and back from the part side or the front edge side, only the other of the parts corresponding to the blade surface of the material is finished. A third finishing step of separating the finishing end mill from the portion corresponding to the blade surface of the material;
After completion of the third finishing step, the second finishing step and the third finishing step are alternately repeated while giving the finishing end mill a pitch feed in the span direction of the portion corresponding to the blade surface of the material. And a fourth finishing step of finishing the abdomen and the back of the material corresponding to the wing surface into the abdomen and the back of the wing surface of the wing member.   The material is divided into a plurality of sections from the front end to the base end of the wing surface equivalent portion, and the first finishing process, the second finishing process, the third finishing process, and the fourth finishing process are performed for the plurality of sections. The blade surface finishing method according to claim 1, wherein a series of steps comprising:

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