JP2010017769A - Method of machining sheet-like workpiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of machining a sheet-like workpiece, machining the sheet-like workpiece accurately in a short period of time without adding a device for supporting the sheet-like workpiece. <P>SOLUTION: In this method of machining a sheet-like workpiece, the sheet-like workpiece W is supported at one end or both ends, and machined so as to have a desired three-dimensional curved surface by cutting the any portions thereof. The workpiece is at least finished after rough machining, the portions of the workpiece to be machined are divided into a plurality of machining areas according to the magnitude of the rigidity estimated from the shape of the supported workpiece W after the finish machining, and the workpiece is finished after the rough machining in order from the area of the workpiece with the lowest rigidity to the areas thereof with lower rigidities. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for processing a thin plate-shaped workpiece, which is a blade having a three-dimensional curved surface, used for an aircraft engine, a generator turbine, or the like.

Conventionally, a thin plate-shaped workpiece W, which is a blade used in an aircraft engine, a generator turbine, or the like, has a three-dimensional curved surface. As shown in FIGS. With one end or both ends supported, the five axes (X axis, Y axis, Z axis, A axis, B axis in FIGS. 1A and 1B) are controlled, and the tool T Processed.
In general, a ball end mill is used as the tool T, which is processed in two steps, a roughing process and a finishing process. In the roughing process, the entire thin plate-shaped workpiece W is processed to near the exact size with a roughing tool. (The remaining allowance is about 0.1 mm to 0.5 mm), and in the finishing process, the whole is finished after being replaced with a finishing tool.
In the conventional processing method of the thin plate-shaped workpiece W, since the entire thin plate-shaped workpiece W is processed to near the exact size in the roughing process, the rigidity of the thin plate-shaped workpiece W is reduced in the finishing processing step. It is necessary to reduce the cutting resistance, and the machining time is relatively long because the cutting amount and the feeding amount are small. Further, since the rigidity is low, chatter (resonance) and uncut error are likely to occur, and the processing accuracy may be reduced.
Therefore, in the prior art described in Patent Document 1, in order to perform processing with high efficiency, a base extending along the wide surface of the thin plate workpiece is disposed below the thin plate workpiece, and the wide surface of the thin plate workpiece is arranged. A workpiece support device is disclosed in which a plurality of extending and contracting cylinders capable of supporting (from the back side) are provided on a base to suppress bending of a thin plate-shaped workpiece. Further, the base is configured to be turnable integrally with the thin plate-shaped workpiece, and it is not necessary to readjust the cylinder of the base even if the angle of the thin plate-shaped workpiece is changed.
JP-A-6-297222

In the prior art described in Patent Document 1, a workpiece support device (base having a plurality of cylinders) adapted to the size and shape of a thin plate-shaped workpiece is required, and the workpiece support device is adapted to the thin plate-shaped workpiece. It is necessary to change the expansion and contraction positions of the plurality of cylinders and to support the thin plate-shaped workpiece after starting the machining after attaching the workpiece support device.
The present invention was devised in view of such points, and without adding an apparatus for supporting a thin plate-shaped workpiece, it is possible to process a thin plate-shaped workpiece with higher accuracy in a shorter time. It aims at providing the processing method of a thin-plate shaped workpiece | work.

As means for solving the above-mentioned problems, the first invention of the present invention is a method for processing a thin plate workpiece as described in claim 1.
The thin plate-shaped workpiece processing method according to claim 1, wherein one or both ends of the thin plate-shaped workpiece are supported, an arbitrary portion of the supported thin plate-shaped workpiece is cut, and the thin plate-shaped workpiece is desired. This is a thin plate work processing method.
In the cutting process, a finishing process is performed at least after the roughing process, and a plurality of machining positions of the thin plate-shaped workpiece are determined in accordance with the rigidity height estimated from the finished shape of the thin-plate workpiece in the supported state. Divide into machining areas.
Then, in order from the machining area with the lowest rigidity, the finishing process is performed following the roughing process, and then the finishing process is repeated for the machining area with the next lowest rigidity after the roughing process. This is a thin plate-shaped workpiece machining method for performing machining.

The second invention of the present invention is a method for processing a thin plate workpiece as described in claim 2.
The thin plate-shaped workpiece processing method according to claim 2 is the thin plate-shaped workpiece processing method according to claim 1, wherein a plurality of the thin plate-shaped workpieces are attached to an outer peripheral surface of a predetermined rotating member during use. In addition, one end of each thin plate-shaped workpiece is attached to the predetermined rotating member and has a wing shape, and the thin plate-shaped workpiece is supported by one end attached to the predetermined rotating member during processing. The ratio of division of the machining area is changed so that the machining area increases from the far side to the near side with respect to the supported one end, and the machining on the farthest side with respect to the supported one end is performed. In order from the region, the finishing is performed following the roughing, and then the roughing is performed on the processing region farthest from the supported end. Performing cutting repeating a thin plate work processing method.

A third invention of the present invention is a method for processing a thin plate workpiece as described in claim 3.
The thin plate-shaped workpiece processing method according to claim 3 is the thin plate-shaped workpiece processing method according to claim 1, wherein a plurality of the thin plate-shaped workpieces are attached to an outer peripheral surface of a predetermined rotating member during use. In addition, one end of each thin plate-shaped work is attached to the predetermined rotating member, and has a wing-like shape, the thin plate-shaped work is one end attached to the predetermined rotating member during processing, Both ends of the one end and the opposite end are supported, and the ratio of the division of the processing region is set so that the processing region becomes larger from the vicinity of the center that is far from the supported both ends toward the side closer to the both ends. After performing the finishing process following the rough machining in order from the machining area close to the vicinity of the supported ends of the both ends, and then changing the machining area close to the vicinity of the center. Performing cutting repeating the performing the finishing followed the roughing Te, a thin plate work processing method.

The fourth invention of the present invention is a method for processing a thin plate workpiece as described in claim 4.
The processing method of the thin plate-shaped workpiece according to claim 4 is the thin plate-shaped workpiece processing method according to any one of claims 1 to 3, wherein the processing region having higher rigidity is processed at the time of the rough processing. This is a thin plate work processing method in which at least one of the feed amount or the cut amount is increased.

The fifth invention of the present invention is a method for processing a thin plate workpiece as described in claim 5.
The thin plate-shaped workpiece processing method according to claim 5 is the thin plate-shaped workpiece processing method according to claim 4, wherein the switching work increase time when switching from the roughing to the finishing processing, and the feed amount or The number of divisions of the machining area is determined so that the entire machining time is shortened based on the shortening time when machining due to an increase in at least one of the cutting amounts and the increasing time when moving to move the machining area. This is a thin plate work processing method.

A sixth aspect of the present invention is a method for processing a thin plate workpiece as described in the sixth aspect.
The thin plate-shaped workpiece machining method according to claim 6 is the thin plate-shaped workpiece machining method according to any one of claims 1 to 5, wherein the rough machining and the finishing machining are performed on all the machining areas. Is a thin plate-shaped workpiece processing method for performing processing for removing irregularities at the boundary of each processing region.

A seventh aspect of the present invention is a blade member as described in the seventh aspect.
A blade member according to a seventh aspect is a blade member that is a thin plate-shaped workpiece processed by the thin plate-shaped workpiece processing method according to any one of the first to sixth aspects.

According to the method for processing a thin plate-shaped workpiece according to claim 1, when the rigidity of the thin plate-shaped workpiece is first reduced without dividing the entire thin plate-shaped workpiece into a plurality of processing regions, the rigidity is lowest. In order from the estimated machining area, the rough machining is followed by the finishing machining, thereby proceeding while leaving the rigidity of the unmachined machining area.
Thereby, it is not necessary to delay the machining time due to insufficient rigidity, the machining time can be shortened, and a device for supporting the thin plate workpiece is not added. In addition, it is possible to reduce “chatter”, “uncut material” and the like due to insufficient rigidity, and to perform machining with higher accuracy.

Moreover, according to the processing method of the thin plate-shaped workpiece according to claim 2, when supporting one end of the thin plate-shaped workpiece, the processing can be advanced while maintaining the rigidity more appropriately.
Thereby, it is possible to perform processing with higher accuracy in a shorter time without adding an apparatus for supporting the thin plate-shaped workpiece.

Further, according to the method for processing a thin plate-shaped workpiece according to claim 3, when supporting both ends with respect to claim 2, which supports one end of the thin plate-shaped workpiece, the processing proceeds while maintaining rigidity more appropriately. Can continue.
Thereby, it is possible to perform processing with higher accuracy in a shorter time without adding an apparatus for supporting the thin plate-shaped workpiece.

  According to the thin plate-shaped workpiece machining method according to claim 4, the machining time is further shortened by increasing at least one of the feed amount or the cutting depth (of the tool or workpiece) in the machining region having higher rigidity. Can be realized.

  Moreover, according to the thin plate-shaped workpiece machining method according to claim 5, the time is increased by dividing into a plurality of machining areas, and the time increased during movement, the switching work increase time, and the plurality of machining areas are divided. Accordingly, it is possible to determine an appropriate machining area in consideration of the balance with the machining time reduction time, which is a time that can be reduced.

  Moreover, according to the processing method of the thin-plate shaped workpiece | work of Claim 6, the processing precision in the boundary part of each process area | region can be improved more.

  Moreover, according to the processing method of the thin plate shaped workpiece according to claim 7, it is possible to realize a blade member processed in a shorter time and with higher accuracy.

  The best mode for carrying out the present invention will be described below with reference to the drawings. 1A and 1B are schematic external views (perspective views) in an embodiment of a processing apparatus 1 to which the thin plate workpiece processing method of the present invention is applied. Note that in the drawings described in this embodiment, the Y axis indicates a vertically upward direction, and the X axis and the Z axis are orthogonal to each other in the horizontal direction. The A axis is a horizontal turning axis, and the B axis is a vertical turning axis. The tool T is a ball end mill, and the Z-axis direction is a rotation axis.

● [Schematic structure of the processing apparatus 1 (FIGS. 1A and 1B)]
A processing apparatus 1 shown in FIG. 1A is a processing apparatus that supports one end portion along the rotation axis of a thin plate-shaped workpiece W (hereinafter, “work W” refers to the thin plate-shaped workpiece W). FIG. 1B shows an example of a processing apparatus that supports both ends along the rotation axis of the workpiece W. In addition, the processing apparatus 1 shown to FIG. 1 (A) and (B) is an existing processing apparatus.
As shown in FIG. 1A, the processing apparatus 1 includes a bed 10 on which a column 20 that can reciprocate in the X-axis direction and a bed 30 on which a slide table 31 that can reciprocate in the Z-axis direction are mounted. Are combined.
The column 20 is provided with a saddle 21 that can reciprocate in the Y-axis direction, and the saddle 21 is provided with a main shaft 22 having a rotation axis in the Z-axis direction. A tool T (for example, a ball end mill) is attached to the main shaft 22.
The slide table 31 is provided with a turning table 32 that can turn around the B axis. The turning table 32 has a chuck portion 33 that can turn around the A axis and support the workpiece W. Is provided.
As described above, the machining apparatus 1 is controlled by the five axes of the X axis, the Y axis, the Z axis, the A axis, and the B axis (the numerical control device that controls the five axes is not shown) and is supported by the chuck portion 33. An arbitrary position of the workpiece W can be cut with the tool T from an arbitrary direction.
The processing apparatus 1 shown in FIG. 1B is provided with a pair of chuck portions 33 that can adjust the interval on the turning table 32 with respect to the processing apparatus 1 shown in FIG. However, since the other is the same, the description is omitted.

● [Application and structure of thin plate-shaped workpiece W (Fig. 2)]
Next, an example of the use and structure of the thin plate-shaped workpiece W will be described with reference to FIGS. In use, a plurality of thin plate-shaped workpieces W are attached to the outer peripheral surface of a predetermined rotating member (one end of each thin plate-shaped workpiece W is attached to the predetermined rotating member), and have a wing shape.
For example, the thin plate-shaped workpiece W is used for an aircraft engine, a generator turbine, or the like. FIG. 2A shows an example of a turbine shaft of an aircraft engine and parts attached to the shaft. In FIG. 2A, a plurality of thin plate-shaped workpieces are regularly attached at each of the positions indicated by W1, W2, and W3.
In addition, as shown in FIG. 2B, the structure of each thin plate-shaped workpiece W includes a base portion WB attached to a rotary shaft member (shaft or the like) and a blade portion WW. It has a complicated three-dimensional curved surface according to the application and mounting position (for example, it has a wing shape with a “twist”).

The processing method of the thin plate-shaped workpiece described in the present embodiment uses the existing processing apparatus 1 shown in the example of FIG. 1 (A) or (B), and the three-dimensional curved surface shape of the blade portion WW. This is a method of processing in a shorter time and with higher accuracy than in the prior art.
In the conventional machining method, for example, when machining the workpiece W shown in FIG. 3A, the base portion WB is supported by the chuck portion 33 of the machining apparatus 1 shown in FIG. First, the entire blade portion WW is cut until it is close to the exact size (the remaining margin is about 0.1 mm to 0.5 mm). That is, since the “machining allowance” shown in FIG. 3B is removed from the entire blade part WW, after the tool T for the finishing process is replaced, in the next finishing process, the thinned blade part WW At the tip portion far from the support position, the rigidity of the workpiece W is low, and “chatter” and “bending” are likely to occur. For this reason, it is necessary to perform finishing with sufficiently reduced machining speed and machining allowance, and the machining time becomes long and high-precision machining is difficult.

● [Processing method for thin workpiece W (Fig. 3)]
Next, the processing method of the present embodiment will be described with reference to FIGS.
3A shows an example of a perspective view of the thin plate-shaped workpiece W, and FIG. 3B shows a view of the thin plate-shaped workpiece W viewed from the AA direction in FIG. 3A.
In the processing method of the present embodiment, the shape and material of the thin plate-shaped workpiece W after finishing processing in a supported state without first processing the “whole” of the blade portion WW to near the exact size by rough processing. Based on the rigidity estimated from the above, the blade portion WW is divided into a plurality of machining areas according to the rigidity, and the rough machining is performed in order from the machining area with the lower rigidity (that is, the machining area that is easily deformed). Continue to finish processing. Note that the rigidity can be estimated by a simulation using an existing FEM analysis or the like based on the support position, the finished shape, the material, and the like.

For example, in the case of the workpiece W shown in FIG. 3A, the blade portion WW is divided into a machining area A to a machining area C according to the estimated rigidity. The height of rigidity in this case is assumed to be machining area C> machining area B> machining area A.
Then, at the time of machining, a rough machining tool T is first attached, and the machining area A having the lowest rigidity is roughly machined and cut to near the exact size. Then, the machining area A is finished by exchanging with the finishing tool T, and the machining area A is completed up to finishing. When finishing the machining area A, the machining areas C and B have not yet undergone rough machining, and have a thickness equivalent to the machining allowance, which is sufficiently larger than when machining by the conventional machining method. Since it remains, “chatter” and “deflection” are less likely to occur than in the past. Therefore, the machining accuracy can be improved as compared with the conventional technique, and finishing can be performed in a short time by increasing the machining speed as compared with the conventional technique.
After finishing the machining area A until finishing, replace it with the roughing tool T, then roughen the machining area B with the next lowest rigidity, cut it to near the exact size, and replace it with the finishing tool T To finish the processing area B. In this way, finishing is performed for each processing region sequentially from the processing region with low rigidity toward the processing region with high rigidity. In the case of the example of FIGS. 3 (A) and 3 (B) for supporting and processing one end of the thin plate-shaped workpiece W, in order from the processing region (in this case, processing region A) farthest from the supported end, Cutting after repeating roughing and finishing, and then repeatedly performing roughing on the processing area (in this case, processing area B) on the side farthest from the supported end. Processing.
A more preferable finished shape can be obtained by performing a finishing process that removes the irregularities at the boundary of each processing region after the processing of all the processing regions is completed.

In the machining area with low rigidity, naturally, the feed amount of the tool T and the cutting amount of the tool T must be smaller than the machining area with high rigidity (the higher the rigidity of the machining area, the more the feed amount or the cutting amount). At least one can be larger). Therefore, it is preferable that the rigidity variation width in the machining area is smaller in the machining area with low rigidity (in order to set the feed amount and the cutting amount in accordance with the lowest rigidity).
For this reason, it is preferable to change the division ratio of the machining area so that the machining area becomes larger (the area or the volume becomes larger) from the machining area with low rigidity toward the machining area with high rigidity. In the example of FIGS. 3A and 3B, a division ratio (in this case, a workpiece rotation axis) is directed from the machining area A that is the farthest position from the support position to the machining area C that is the nearest position to the support position. (Length in the (A axis) direction) is gradually increased.

Various methods can be considered as the method of dividing the processing area. For example, the number of divisions (each profit area) is determined as follows.
In the workpiece W machining method according to the present embodiment described above, when the number of division of the machining area is increased, the number of times of replacing the rough machining tool T and the finishing tool T is increased. The accompanying increase time is referred to as “switching work increase time”.
Further, when the number of divisions of the machining area is increased, the movement time from the machining area completed up to the finishing machining to the next machining area increases. The accompanying increase time is referred to as “movement increase time”.
Moreover, by dividing into multiple machining areas, the time that is shortened by increasing at least one of the feed amount or the cutting amount (rough machining is started except for the above switching work increase time and moving time increase time). The time shortened by the time from finishing to completion of finishing processing) is referred to as “processing shortened time”.
Then, divide the machining area at an appropriate position in the simulation, find the division switching work increase time for each machining area, increase time during movement, shortening time during machining, increase / decrease time when machining all machining areas Ask for. Such a division and increase / decrease time simulation is performed, and the number of divisions and the machining area where the increase / decrease time is minimized are determined.

As described above, in the description using FIGS. 3A and 3B, the case where one end of the workpiece W is supported has been described, and thus an example in which rigidity increases as the position approaches the support position from the position farthest from the support position has been described. .
In the following description, a case where both ends of the workpiece W are supported will be described with reference to FIG.
When both ends of the work W are supported, the both supported end portions have high rigidity, and the rigidity in the vicinity of the center, which is a position far from the support position of both end portions, is low. Therefore, in the example shown in FIG. 3C, the machining area A in the vicinity of the center has the lowest rigidity, and the rigidity is, for example, machining area E> machining area D> machining area C> machining area B> machining area. A.
In the case of the example of FIG. 3 (C) in which both ends of the thin workpiece W are supported and processed, rough machining is performed in order from the processing area close to the center with respect to the supported ends (in this case, the processing area A). After the machining is performed, next, a machining process is performed in which a machining area close to the center (in this case, a machining area B) is repeatedly subjected to a roughing process and a finishing process. Therefore, in the example of FIG. 3C, the processing is performed in the order of processing area A-processing area B-processing area C-processing area D-processing area E.
As for the split ratio, as in the case of supporting one end, machining is performed so that the machining area increases from the machining area with low rigidity to the machining area with high rigidity (the area or volume increases). It is preferable to change the area division ratio. In the example of FIG. 3C, the division ratio (in this case, the workpiece rotation axis) from the machining area A that is the farthest position from both supported ends (from both ends) toward the side closer to the supported both ends. (Length in the (A axis) direction) is gradually increased. In the example of FIG. 3C, the division ratio is set as machining area E> machining area D> machining area C> machining area B> machining area A.
Note that the determination of the number of divisions and the finishing process for removing the irregularities at the boundary portions of the respective processing areas are as described above, and thus description thereof is omitted.

● [Appearance and usage examples of tools (Figs. 4 and 5)]
If the “switching work increase time” and the “movement increase time” described above can be shortened, the machining time can be further shortened. Therefore, the inventor has invented a special tool TN capable of selectively performing roughing and finishing without exchanging the tool T, paying attention to the “switching work increase time”. Hereinafter, the appearance and usage of the tool TN will be described.
4A and 4B show examples of a side view and a front view of the tool TN of the present invention, and FIGS. 4C and 4D show examples of a side view and a front view of the conventional tool T. Is shown.

  The conventional tool T shown in FIGS. 4C and 4D has an approximately cylindrical shape, and is an end mill provided with a side blade Ts on the side surface. And the said side blade Ts is extended toward the bottom face from the side surface of the substantially cylindrical tool T, and the corner blade Tc formed in circular arc shape in the boundary part of a side surface and a bottom face is provided. The region Tz around the center of the bottom surface is not provided with a blade, and is formed flat. Further, the conventional tool T has a roughing tool T and a finishing tool T separately.

In contrast, the tool TN of the present embodiment shown in FIGS. 4 (A) and 4 (B) is substantially the same in that it has a substantially cylindrical shape, and includes a side blade Ts and a corner blade Tc. The difference is that a bottom surface corresponding to the tip of the tool TN is provided with a substantially spherical finishing blade Tt. For example, the finishing blade Tt is a spherical grinding wheel, and the tool TN is a composite end mill in which an end mill and a grinding stone are combined.
The spherical radius of the spherical finishing blade Tt is larger than the radius of the cylindrical bottom surface that is the outer shape of the tool TN. The larger the spherical radius, the more the transfer efficiency is improved and the height of the unevenness on the finished surface can be made smaller. Further, the radius of the arc of the arcuate contour shape of the corner blade Tc (contour shape in the side view shown in FIG. 4A) is smaller than the spherical radius of the finishing blade Tt.
Further, the shape of the corner blade Tc is adjusted so that the edge of the finishing blade Tt is continuous with the corner blade Tc with a smooth curve, and the corner blade Tc and the corner blade Tc are connected to each other at the connection portion between the corner blade Tc and the side blade Ts. The shape of the corner blade Tc is adjusted so that the side blade Ts is smoothly continuous.
As a result, in the side view shown in FIG. 4A, the contour of the finishing blade Tt, the contour of the corner blade Tc, and the contour of the side blade Ts are smoothly continuous.
In addition, a coolant supply path Th that penetrates the tool TN and the finishing blade Tt is formed in the tool TN at a position corresponding to the rotation axis (along the rotation axis), and machining is performed from the coolant supply path Th. Coolant is supplied to the location.

In the tool TN described above, the side blade Ts or the corner blade Tc is provided as a roughing blade, and a large amount of machining allowance can be cut in a short time (see FIG. 5A). Further, the finishing blade Tt is provided as a finishing blade, and although the machining allowance is small, the surface can be finished with high accuracy (see FIG. 5B).
Next, the usage of the tool TN described above will be described with reference to FIGS. FIG. 5 (A) shows an example of a state in which the surface of the thin plate-shaped workpiece W is roughly processed using the tool TN, and FIG. 5 (B) shows the surface of the thin plate-shaped workpiece W using the tool TN. The example of the state which is finishing is shown.

When roughing an arbitrary processing region of the thin plate-shaped workpiece W, as shown in FIG. 5A, the processing surface is set such that at least one of the side blade Ts or the corner blade Tc of the tool TN is in contact with the processing surface. On the other hand, the inclination angle θ1 of the rotation axis of the tool TN is increased, and the tool TN is moved relative to the thin plate-shaped workpiece W along the machining surface for machining. In this case, the finishing blade Tt does not contact the processed surface.
Next, when finishing an arbitrary processing region of the thin plate-shaped workpiece W, as shown in FIG. 5B, the finishing blade Tt of the tool TN is in contact with the processing surface, and the corner blade Tc and the side blade are used. The tilt angle θ2 of the rotation axis of the tool TN with respect to the machining surface is reduced so that Ts does not contact the machining surface, and the tool TN is moved along the machining surface relative to the thin plate-shaped workpiece W. Processing.
As described above, by adjusting the inclination angle of the tool TN with respect to the machining surface, it is not necessary to exchange the tool TN between rough machining and finishing machining, so that the switching work time can be greatly shortened.
In addition, when finishing with the finishing blade Tt in contact with the thin plate-shaped workpiece W, when the inclination angle θ2 of the rotation axis of the tool TN with respect to the thin plate-shaped workpiece W is set, the corner blade Tc is the finished surface of the thin plate-shaped workpiece W. The length in the radial direction of the bottom surface portion of the tool T on the surface of the finishing blade Tt (the length of the radius of the finishing blade Tt) is set so as not to contact the surface.

When the tool TN described above is used, there is no need to exchange the tool TN between the roughing process and the finishing process, so that the workpiece W can be used in the roughing process without being divided into a plurality of machining areas as in the prior art. Even if the whole is machined to near the exact size and then the whole workpiece W is finished, the machining time can be shortened because the tool TN is not required to be replaced.
Further, the finishing blade provided at the tip of the tool TN may be a cutting blade having a larger number of side blades instead of a grindstone (for example, when the number of the side blades Ts is four, ten finishing blades Tt are provided. ). When the number of blades is large, the feed speed of the tool TN can be increased and the machining time can be further shortened even if the height of the unevenness of the finished surface is the same.

The thin plate-shaped workpiece machining method of the present invention is not limited to the machining method described in the present embodiment, and various modifications, additions, and deletions can be made without changing the gist of the present invention.
Moreover, the processing method of the thin plate-shaped workpiece described in the present embodiment is not limited to the processing apparatus 1 shown in the examples of FIGS. 1A and 1B, and can be applied to various processing apparatuses. Is possible.
Moreover, the external shape of the tool TN is not limited to the external shape shown in FIGS. 4 (A) and 4 (B).

It is a figure explaining the schematic external view (perspective view) in one Embodiment of the processing apparatus 1 to which the processing method of the thin-plate shaped workpiece | work of this invention is applied. It is a figure explaining the example of the use of a thin plate-shaped workpiece W, and a structure. It is a figure explaining the processing method of the thin-plate shaped workpiece | work of this invention. It is a figure explaining the external appearance of the tool TN (composite end mill) of this invention. It is a figure explaining the usage of the tool TN (composite end mill) of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Processing apparatus 10 Bed 20 Column 21 Saddle 22 Spindle 30 Bed 31 Slide table 32 Turning table 33 Chuck part TN, T Tool Ts Side blade Tc Corner blade Tt Finishing blade Th Coolant supply path W Thin plate-shaped workpiece (work)
θ1, θ2 tilt angle

Claims (7)

Support one or both ends of the thin plate workpiece,
In a thin plate-shaped workpiece machining method, cutting an arbitrary portion of the supported thin plate-shaped workpiece, and finishing the thin plate-shaped workpiece into a desired three-dimensional curved surface,
In the cutting process, finish processing is performed at least after roughing,
According to the height of rigidity estimated from the finished shape of the thin plate-shaped workpiece in the supported state, the processing portion of the thin plate-shaped workpiece is divided into a plurality of processing regions,
In order from the machining area having the lowest rigidity, the finishing machining is performed after the rough machining, and then the finishing machining is repeatedly performed on the machining area having the next lowest rigidity after the rough machining. I do,
Thin plate workpiece processing method. The thin plate-shaped workpiece machining method according to claim 1,
In use, the thin plate-shaped workpiece is attached to a plurality of outer peripheral surfaces of a predetermined rotating member, and one end of each thin plate-shaped workpiece is attached to the predetermined rotating member, and has a wing-like shape,
The thin plate-shaped workpiece is supported at one end attached to the predetermined rotating member during processing,
The ratio of division of the machining area is changed so that the machining area becomes larger from the far side to the near side with respect to the supported end, and the farthest side from the machining area with respect to the supported end. In order, after performing the finishing process following the roughing process, the cutting process repeatedly performing the finishing process following the roughing process on the processing area on the side farthest from the supported end. I do,
Thin plate workpiece processing method. The thin plate-shaped workpiece machining method according to claim 1,
In use, the thin plate-shaped workpiece is attached to a plurality of outer peripheral surfaces of a predetermined rotating member, and one end of each thin plate-shaped workpiece is attached to the predetermined rotating member, and has a wing-like shape,
At the time of processing, the thin plate workpiece is supported at both ends of one end attached to the predetermined rotating member and an end opposite to the one end,
The ratio of division of the machining area is changed so that the machining area becomes larger toward the side closer to both ends from the vicinity of the center that is far from the supported ends, and the vicinity of the center near the supported ends is changed. In order from the machining area, after the finishing process is performed following the roughing process, a cutting process is performed in which the finishing process is repeated after the roughing process on the machining area near the center. ,
Thin plate workpiece processing method. A thin plate work processing method according to any one of claims 1 to 3,
At the time of the roughing, at least one of the feed amount or the cut amount at the time of machining is increased in the machining region having the higher rigidity.
Thin plate workpiece processing method. It is a thin plate-shaped workpiece processing method according to claim 4,
Switching work increase time when switching from the roughing to the finishing,
Processing time shortened by increasing at least one of the feed amount or the cut amount; and
Determining the number of divisions of the processing area so as to shorten the overall processing time based on the increase time when moving to move the processing area,
Thin plate workpiece processing method. It is a processing method of the thin plate-shaped workpiece according to any one of claims 1 to 5,
For all the regions of the processing region, after finishing the roughing and finishing, the processing to remove the irregularities at the boundary of each processing region,
Thin plate workpiece processing method. A blade member which is a thin plate-shaped workpiece processed by the thin plate-shaped workpiece processing method according to claim 1.

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