JP4469615B2 - Circular member cutting tool and circular member cutting method using this cutting tool - Google Patents

Description

  The present invention relates to a tool capable of easily cutting a large number of circular members such as a CCD panel covering a lens portion for a CCD camera from a plate material, and a cutting method using the tool.

When a member having a predetermined size and shape is cut out from a material such as a plate material or a tube material, the member is generally cut out by taking out the material so that the utilization factor of the material is as high as possible.
For example, in the technique described in Patent Document 1, when cutting various lengths of pipe materials used in thermal power plants, nuclear power plants, chemical plants, and the like from commercially available standard length pipe materials, the remaining material of the pipe materials is reduced. A technique is devised in which the material of the pipe material is devised so as to be as small as possible.
Japanese Patent Laid-Open No. 2002-36025 (see, for example, the description of [0003] to [0006] in the specification)

In this way, taking out and cutting out the material of the member so that the utilization rate of the material is as high as possible is to use a circular member such as a CCD panel as a cover to protect the lens of the CCD camera. The same applies to the case of cutting out from.
FIG. 10 is a diagram for explaining a procedure for cutting out a CCD panel from a plate material.
First, as shown in FIG. 10A, a rotary tool 10 such as an end mill mounted on a spindle of a processing machine (not shown) is positioned at a predetermined position above the plate material 20.
Next, the rotary tool 10 is moved (lowered) in the direction indicated by the arrow I as shown in FIG. 10B while rotating about the rotation axis C together with the spindle, and the cutting edge 13 is moved with respect to the plate material 20. To cut the specified dimensions.

  FIG. 10C is a view for explaining the feed of the blade edge 13 and is a plan view of the blade edge 13 and the plate material 20 of FIG. 10B viewed from the same direction as the rotation axis C. FIG. As shown in FIG. 10C, the outer shape of the CCD panel 30 is formed while the cutting edge 13 cut into the plate 20 by a predetermined size is sent in a circular shape in the direction indicated by the arrow II by circular interpolation.

  Then, as shown in FIG. 10 (d), the cutting edge 13 is cut in a predetermined dimension in the direction of arrow III and the circular feed by circular interpolation is repeated a plurality of times to form the outer shape of the CCD panel 30, Cut out.

When cutting out the CCD panel 30 from the plate material 20, it is necessary to take out the material in advance so that the maximum number of CCD panels 30 can be cut out from the plate material 20, as described above.
FIG. 11 shows the material removal of the CCD panel 30 for cutting out the CCD panel 30 from the plate material 20, and the material removal of the CCD panel 30 is performed at intervals s 3 along the short side and the long side of the plate material 20. .
The smallest interval s3 is selected from dimensions in which the blade edge 13 does not come into contact with another adjacent CCD panel 30 when the blade edge 13 is moved along the outer shape of the CCD panel 30.

However, the above clipping method has the following problems.
(1) Since the CCD panel 30 is cut out by milling processing in which the rotary tool 10 is rotated along with the spindle and moved along the outer shape of the CCD panel 30 by circular interpolation, at least the gap s3 of the CCD panel 30 is set at least. The diameter of the blade edge 13 must be secured, and the number of CCD panels 30 that can be cut out from the plate 20 cannot be increased any more.
(2) In circular interpolation, it is difficult to set the feed speed of the rotary tool 10 (the feed speed in the direction of arrow II in FIG. 10C) to a certain level or more, and it takes a lot of time to cut out the CCD panel 30. Cost.
Further, in order to cut out at a high feed rate, a special-purpose processing machine having a spindle that rotates at a high speed is required.
(3) In order to perform milling processing, the rotary tool 10 must be rotated at a high speed. However, in the rotary tool 10 such as an end mill, vibration is likely to occur during cutting, and the finish of the cut surface is deteriorated. In addition, in circular interpolation cutting using the rotary tool 10 such as an end mill, cutting traces are likely to remain at inflection points. Therefore, a member such as an optical element that requires high finishing accuracy needs to be finished in another process, resulting in a high processing cost.

  The present invention has been made to solve the above-described problems all at once, and can dramatically increase the number of circular members that can be cut out from a single plate member, and each circular member. The production time can be greatly reduced, and the outer peripheral surface of the cut circular member can be made into a good finished surface, so that finishing in other processes is unnecessary or the time required for finishing can be reduced. It aims at providing the cutting tool which is excellent in the property, and can cut processing cost significantly, and the cutting method of the circular member using this tool.

In order to achieve the above object, the inventor of the present invention cuts out the member with a tool having a rotating shaft concentric with the member when cutting out a circular member such as a CCD panel. In addition, it has been found that by devising the shape of the blade of the tool, the groove width of the cutting groove can be greatly reduced, the gap between the members can be reduced, and the number of cuts can be increased. .
Moreover, it discovered that the cutting of the said member and the cutting process of the said member could be performed simultaneously by devising the shape of a cutter further.

Specifically, the invention according to claim 1 is a cutting tool for cutting out a circular member from a plate material, and the tool has a rotation shaft on the same core as a circular member cut out from the material. , by rotation around the rotation axis, it has a tool for cutting out the outer shape of the circular member, wherein the blade has a first cutting edge for cutting the outer shape of the circular member, to the first cutting edge portion The second cutting edge portion is formed continuously and is inclined radially outward with respect to the rotation axis.

  According to this configuration, since the circular member is cut out while the blade is rotated together with the spindle on which the tool is mounted, the circular member can be cut out in a shorter time than milling. It is also possible to reduce the rotational speed of the blade and improve the finish of the cutting surface. In addition, the cutting trace of the inflection point by circular interpolation is not formed.
  Further, since the second cutting edge portion is formed to be inclined outward in the radial direction of the rotating shaft, the groove width of the cutting groove can be reduced by the inclined amount, and the material of the circular member is taken. At the same time, the gap between the circular members can be reduced to increase the number of workpieces.

According to a second aspect of the present invention, the first cutting edge portion may be formed as a cutting edge portion that cuts a side surface of the circular member when the circular member is cut out.
In this way, it becomes possible to finish the outer peripheral surface of the circular member by the first cutting edge portion simultaneously with the cutting of the circular member, omitting the finishing process in other processes, and reducing the finishing time. It can be shortened.

As described in claim 3 , the inclination angle of the second cutting edge is preferably in the range of 40 ° or more and less than 50 ° with respect to the rotation axis.
By doing so, it is possible to reduce the groove width of the cutting groove and increase the number of circular members to be taken while maintaining the strength of the cutting edge portion of the blade at a certain level or more.

According to a fourth aspect of the present invention, the blade has a third cutting edge portion that is formed continuously with the second cutting edge portion and faces the first cutting edge portion, and the second In the cutting blade portion, when the inclination angle is β, the blade length is L, and the plate thickness is t, 50 ° ≦ β ≦ 90 ° and Lcosβ <t .
By comprising in this way, the width of a cutting groove can be made still smaller, making it difficult to chip a cutting edge, and the number of circular members to be taken can be further increased.
In this case, the configuration as described in claim 5, wherein the third cutting edge portion, and cutting a portion of the side surface of the other adjacent circular member is formed as a cutting edge portion forming a notch Good.
According to this configuration, among the plurality of adjacent circular members, one circular member is cut out by the first cutting blade portion, and at the same time, the side surfaces of the other adjacent circular members are cut by the third cutting blade portion. It becomes possible to process. For example, when the circular member is a CCD panel for a CCD camera used for a mobile phone or the like, it is necessary to form a notch for positioning in a part of the CCD panel in a later process. They can be formed simultaneously in the process of cutting out the CCD panel, and processing in a later process is not necessary.
The invention according to claim 6 is one or a plurality of cutting blade portions that are formed continuously with the first cutting blade portion and cut a side surface of the circular member into a predetermined shape when cutting out the circular member. It is as a cutting tool which has further.
If comprised in this way, it will become possible to perform not only a finishing process of an outer peripheral surface but other processes, such as a chamfering process and a stepped process, simultaneously with the cutting-out of a circular member.

The invention described in claim 7 is a cutting tool that further includes another blade that cuts the side surface of the circular member into a predetermined shape when the circular member is cut out.
Even with this configuration, it is possible to perform not only the outer peripheral surface finishing process but also other processes such as a chamfering process or a stepped process simultaneously with the cutting of the circular member.

In the cutting method of the circular member using the cutting tool according to any one of claims 1 to 7 , as described in claim 8 , a plate material in which the material of the circular member is taken in advance is prepared, The circular member may be cut out by positioning the cutting tool at a predetermined position, rotating the tool, and feeding the tool to the plate material in the same direction as the rotation axis.
According to this method, it is possible to cut out a circular member in a short time, and it is possible to obtain a good finished surface free from cutting traces at inflection points by circular interpolation.

Moreover, you may make it cut the side surface of the said circular member in a predetermined shape with the cutting-out of the said circular member, as described in Claim 9 .
By doing in this way, the process in another process is abbreviate | omitted or shortening of process time can be aimed at, and process cost can be reduced.

In a tenth aspect of the present invention, when the inclination angle of the second cutting edge portion is α and the plate thickness of the plate member is t, the gap between the adjacent circular members is t · tan α. A method of taking the material.
In addition, as described in claim 11 , when cutting one of the circular members out of at least two adjacent circular members, a part of the other circular member is cut, You may make it form a notch in at least one place of a circular member.
According to this method, for example, the positioning notch for the other circular member can be formed simultaneously with the cutting of the one circular member.
The present invention, as described in claim 12, which is ideal for cutting out the CCD panel used in the lens portion of the CCD camera.

According to the present invention, the number of circular members that can be cut out from one plate member can be greatly increased, and the time required for cutting out individual circular members can be greatly shortened. In addition, since the cutting can be performed with the rotation speed of the cutting tool sufficiently low, vibration during cutting can be suppressed, and the finish of the cutting surface can be kept good. Furthermore, other processes such as formation of a notch for positioning, chamfering, and stepped processing can be performed simultaneously with the cutting.
Thus, according to the present invention, it is possible to simultaneously increase the number of cuts and shorten the cutting time, omit machining processes such as finishing and chamfering, step machining, or shorten machining time in other machining processes. And a significant reduction in processing costs can be realized.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.
In the following description, as a circular member, a CCD panel that covers a lens portion of a CCD camera will be described as an example, but the present invention can also be applied to other circular members such as a lens.

First, a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view for explaining a cutting tool according to a first embodiment of the present invention.
A cutting tool (hereinafter referred to as a tool) 100 includes a shaft portion 112 mounted on a spindle of a processing machine (not shown), a blade 113 for cutting the CCD panel 300 from the plate material 200, and a base 111 on which the blade 113 is mounted. Have.
The cutter 113 is detachably attached to the notch-shaped cutter mounting portion 111 a formed on a part of the side surface of the pedestal 111, either integrally with the pedestal 111, or with a bolt or the like. Further, the material of the blade 113 varies depending on the material of the plate material 200 to be cut out, but when the plate material 200 is formed of a resin such as acrylic or polycarbonate, it is sintered diamond, carbide, high speed, or the like. preferable.

A first cutting edge portion 113 a and a second cutting edge portion 113 b for cutting the plate material 200 are formed at the cutting edge of the blade 113. The first cutting edge portion 113a rises from the cutting edge of the blade 113 in the same direction as the rotation axis C, and forms the outer shape of the CCD panel 300 and cuts the outer peripheral surface. Therefore, the first cutting edge portion 113a must have a dimension sufficiently longer than the plate thickness of the plate member 200. Further, the blade 113 must be positioned and attached to the blade mounting portion 111a so that the horizontal distance from the rotation axis C to the first cutting edge portion 113a matches the radius of the CCD panel 300.
The second cutting edge portion 113b is located on the radially outer side of the rotation axis C with respect to the first cutting edge portion 113a, and has an angle of 40 ° to 50 ° with respect to the rotation axis C from the cutting edge of the blade 113, It is preferably inclined at an angle of 45 ° (in the figure, the inclination angle is indicated by α).

FIG. 2 is a diagram for explaining a procedure for cutting out using the tool configured as described above.
As shown in FIG. 2A, the tool 100 is moved to a position where the CCD panel 300 is cut out from the plate material 200 and positioned. In addition, when a cut start command is output from a control device (not shown), the cut can be started quickly, and after the cutting of one CCD panel is completed, the cutting position of the next CCD panel is quickly In order to enable movement, the distance between the plate member 200 and the cutting edge of the blade 113 in the initial state is preferably as small as possible (about 1 mm to several mm).

When a cutting start command is output from a control device (not shown), as shown in FIG. 2B, the tool 100 starts moving (lowering) in the direction indicated by the arrow IV while rotating at a predetermined rotational speed. Then, the cutting is performed while cutting the blade edge into the plate member 200 by a predetermined dimension.
The cutter 113 is attached to the pedestal 111 so that the horizontal distance from the rotation axis C to the first cutting edge portion 113a exactly matches the radius of the CCD panel 300. Thus, the outer shape of the CCD panel 300 having an accurate dimension is formed, and the outer peripheral surface thereof is simultaneously cut.

Further, since the second cutting edge portion 113b is formed on the outer side of the first cutting edge portion 113a with an inclination of α = 40 ° to 50 ° from the blade edge, the CCD panel 300 is surrounded around the cutting edge. The groove width of the formed cutting groove 300a can be reduced.
This will be described with reference to FIG.
Fig.3 (a) is a figure explaining the relationship between the inclined 2nd cutting-blade part 113b and the cutting groove 300a. As shown in FIG. 3A, the groove width of the cutting groove 300 a can be made smaller than the wall thickness T of the blade 113 by inclining the second cutting edge portion 113 b with the inclination angle α. When the plate thickness of the plate 200 is t and the inclination angle of the second cutting edge portion 113b is α, the gap s1 between the adjacent CCD panels 300 can be set to t · tan α at a minimum. In practice, the gap s1 is selected to be slightly larger than t · tan α in consideration of the cutting margin.

FIG. 3B is a plan view showing the positional relationship between adjacent CCD panels 300. As shown in the figure, by selecting the distance between the CCD panels 300 as the gap s1, the utilization factor of the plate member 200 can be greatly improved.
FIG. 4 is a plan view showing material removal of the CCD panel 300 in the plate material 200. The material removal shown in FIG. 4 is performed so that the cut-out CCD panel 300 has the positional relationship shown in FIG.
When the material is removed in this way, for example, when a CCD panel having a diameter of 5.0 mm to 20 mm is cut out from the plate material 200 having a thickness of 0.3 mm to 3.0 mm, the number of the CCD panels 300 to be taken is about It can be increased by 50% or more.

FIG. 5 is a diagram showing a second embodiment of the tool and the cutting method according to the present invention.
In said 1st embodiment, the magnitude | size of gap | interval s1 can be made smaller than plate | board thickness t by making the value of inclination-angle (alpha) smaller than 45 degrees. However, when the inclination angle α is smaller than 40 °, there is a disadvantage that the angle of the blade edge becomes too small and the chip is easily chipped. Therefore, in the second embodiment, the inclination angle α is made larger than the above value to make it difficult to chip.

  Further, in order to further reduce the size of the gap s1 than in the first embodiment, the inclination angle β of the second cutting edge portion 123b is set to an angle of 50 ° to 90 ° with respect to the rotation axis C, FIG. In the example shown in (a), β is inclined at an angle of 85 °, and the blade length L of the second cutting blade portion 123b is at least L · cos β <t with respect to the plate thickness t. Is selected. The length L of the blade may be selected so that the value of L · cos β is 0.05 t to 0.83 t, preferably 0.1 t to 0.7 t.

  Further, in this embodiment, a third cutting edge portion 123c is formed continuously with the second cutting edge portion 123b at a position facing the first cutting edge portion 123a, and the third cutting edge portion 123c is formed. Is inclined at an angle of γ = 25 ° in the example shown in FIG. 5A within the range of 0 ° to 30 °.

Further, as shown in FIG. 5B, the inclination angle β of the second cutting edge portion 123b can be set to 90 °, and the inclination angle γ of the third cutting edge portion 123c can be set to 0 °. In this case, in order to facilitate cutting into the material 200, the second cutting edge portion 123b may be formed in a curved shape or a bent shape as illustrated.
When the blade 123 of FIG. 5B is used, one CCD panel 300 of two adjacent CCD panels 300 is cut out by the first cutting blade portion 123a and at the same time, the third cutting blade portion 123c is used. There is an advantage that the side surface processing of the other CCD panel 300 can be performed.
FIG. 6 shows a state in which the cutting out of one CCD panel 300 and the side processing of the other CCD panel 300 are simultaneously performed using the blade 123 of FIG.
In the example shown in FIG. 6, one CCD panel 300 is cut out by the first cutting edge portion 123a, and at the same time, a part of the side surface of the other CCD panel 300 is cut off by the third cutting edge portion 123c. A notch 300b is formed. The notch 300b is used to position the CCD panel 300 when the CCD panel 300 is attached to a digital camera, a mobile phone, or the like, and is usually formed in a later process.
In this embodiment, since the notch 300b can be performed simultaneously with the cutting of the CCD panel 300, there is an advantage that a post-process for forming the notch is not required.
Further, as shown in FIG. 6, in order to simultaneously perform the cutting by the first cutting edge portion 123a and the side surface processing by the third cutting edge portion 123c, a pair of adjacent CCD panels 300, 300 are connected to each other. Since it is necessary to make them approach, there is an advantage that the gap between the CCD panels 300 and 300 can be partially reduced (gap s <b> 2 <gap s <b> 1), and the number of sheets taken from the plate member 200 can be increased.

FIG. 7 is a diagram showing a third embodiment of the tool and the cutting method according to the present invention.
As shown in FIG. 7A, a cutting edge portion of the blade 133 has a first cutting edge portion 133a for cutting the CCD panel 320 and cutting a side surface, and a predetermined amount for the first cutting blade portion 133a. And a second cutting edge portion 133b that is inclined at an angle of α (α = 40 ° to 50 °) and a first cutting edge portion 133a that is continuous and inclined, and is chamfered on the upper peripheral edge of the CCD panel 320. And a fourth cutting edge portion 133d for performing the above.
As shown in FIG. 7B, when the cutting of the CCD panel 320 by the tool 130 having the above-described configuration is started, the cutting of the side surface of the CCD panel 320 and the fourth cutting edge portion are performed by the first cutting edge portion 133a. The chamfering process of the CCD panel 320 is simultaneously performed by 133d.

FIG. 8 is a diagram showing a fourth embodiment of the tool and the cutting method according to the present invention.
As shown in FIG. 8A, the cutting edge portion of the blade 143 has a first cutting edge portion 143a for cutting out the CCD panel 330 and cutting the side surface, and a predetermined amount for the first cutting blade portion 143a. A second cutting edge portion 143b that is inclined at an angle (angle α: α = 40 ° to 50 °), a fourth cutting edge portion 143d for chamfering the upper peripheral edge of the CCD panel 330, A fifth cutting edge portion 143e is formed between the cutting edge portion 143a and the fourth cutting edge portion 143d, and forms a stepped portion in the middle of the side surface of the CCD panel 330.
As shown in FIG. 8B, when the CCD panel 330 is cut out by the tool 140 having the above-described configuration, the side surface of the CCD panel 330 is cut by the first cutting edge portion 143a and the fourth cutting edge portion 143d. The chamfering process of the upper peripheral edge of the CCD panel 330 and the stepped process of the middle part of the side surface of the CCD panel 330 are simultaneously performed.

FIG. 9 is a diagram showing a fifth embodiment of the tool and cutting method of the present invention.
As shown in FIG. 9, on the base 151 of the tool 150, two blade mounting portions 151a and 151b are formed at opposing positions, and the first blade 153 is formed on one of the blade mounting portions 151a and the other blade mounting portion. A second blade 154 is attached to 151b.
The first blade 153 is the same as the blade 113 of the first embodiment, and performs cutting of the CCD panel 340 and side cutting. The second blade 154 is for forming a stepped portion in the middle of the side surface of the CCD panel 340.
When the CCD panel 340 is cut out using the tool 150 described above, the cutting and side processing of the CCD panel 340 are simultaneously performed by the first blade 153. At the same time, the step processing of the CCD panel 340 is performed by the second blade 154.

  According to the tools and cutting methods of the third to fifth embodiments described above, a predetermined cutting process can be performed on a predetermined portion of the CCD panels 320 to 340 simultaneously with the cutting of the CCD panels 320 to 340, and other steps. The processing in can be omitted or the processing time can be shortened. Therefore, there is an advantage that the processing cost can be greatly reduced.

  According to the present invention, for example, in cutting out a CCD panel for a CCD camera used in a mobile phone, the cutting time can be shortened by 85% to 90%. It became possible to reduce by 30%. Furthermore, the machining accuracy could be increased to a range of ± 0.005 mm.

Although the preferred embodiment of the present invention has been described, the present invention is not limited to the above description.
For example, in the fifth embodiment, the blade 153 similar to the blade 113 of the first embodiment and the second blade 154 are combined and attached to the base 151, but the blade of the third embodiment. You may make it combine with the cutter 143 of 133 or 4th embodiment.

  The present invention is not limited to a CCD panel used for a lens of a CCD camera, and can be applied to the formation of any product as long as a circular member is cut out from a plate material.

It is a perspective view for demonstrating the tool concerning 1st embodiment of this invention. It is a figure explaining the procedure which cuts out a CCD panel using the tool of FIG. FIG. 3A is a diagram for explaining the relationship between the inclined second cutting edge portion and the cutting groove, and FIG. 3B is a plan view showing the positional relationship between adjacent CCD panels. It is a top view which shows the material removal of the CCD panel in a board | plate material. It is a figure which shows 2nd embodiment of the tool and cutting-out method of this invention. FIG. 6 shows a state in which cutting of one CCD panel and side processing of the other CCD panel are simultaneously performed using the blade of FIG. It is a figure which shows 3rd embodiment of the tool and cutting method of this invention. It is a figure which shows 4th embodiment of the tool and cutting method of this invention. It is a figure which shows 5th embodiment of the tool and cutting method of this invention. It is a figure explaining the procedure which cuts out a CCD panel from a board | plate material concerning the prior art example of this invention. It is a top view which shows the material removal for cutting out a CCD panel from a board | plate material concerning the prior art example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Tool 111 Base 111a Cutting tool mounting part 112 Shaft part 113 Cutting tool 113a First cutting blade part 113b Second cutting blade part 200 Plate material 300 CCD panel (circular member)
300a Cutting groove

Claims (12)

A tool for cutting out a circular member from a plate material,
The tool, which has a rotation shaft on a circular member coaxial with cut from said material, by rotation around the rotation axis, have a tool for cutting out the outer shape of the circular member,
A first cutting blade portion that cuts out the outer shape of the circular member, and a second cutting blade that is formed continuously with the first cutting blade portion and is inclined radially outward with respect to the rotation axis. Having a part ,
A circular member cutting tool characterized by the above. The cutting tool according to claim 1 , wherein the first cutting edge portion is formed as a cutting edge portion that cuts a side surface of the circular member when the circular member is cut out. 3. The cutting tool according to claim 1, wherein an inclination angle α of the second cutting edge is 40 ° ≦ α <50 ° with respect to the rotation axis. The cutting tool is formed continuously with the second cutting blade portion, and has a third cutting blade portion facing the first cutting blade portion, and the second cutting blade portion has an inclination angle. beta, when the length of the blade was L, and the thickness is t, a 50 ° ≦ β ≦ 90 °, and cut tool according to claim 1 or 2, characterized in that a Lcosβ <t. 5. The cutting tool according to claim 4 , wherein the third cutting edge part is formed as a cutting blade part that cuts a part of a side surface of another adjacent circular member to form a notch part. . It further has one or a plurality of cutting blade portions that are formed continuously with the first cutting blade portion and cut the side surface of the circular member into a predetermined shape when cutting out the circular member. The cutting tool according to any one of Items 2 to 5 . The cutting tool according to any one of claims 1 to 6 , wherein the tool further includes another cutting tool for cutting a side surface of the circular member into a predetermined shape when the circular member is cut out. A cutting method of a circular member using the cutting tool according to any one of claims 1 to 7 ,
Prepare a plate material that has previously taken the material of the circular member,
Positioning the cutting tool at a predetermined position of the plate,
Cutting the circular member while rotating the tool and feeding the tool to the plate material side in the same direction as the rotation axis;
A method for cutting out a circular member characterized by the above. The circular member cutting method according to claim 8 , wherein a side surface of the circular member is cut into a predetermined shape along with the cutting of the circular member. The material removal is performed so that a gap between adjacent circular members is t · tan α, where α is an inclination angle of the second cutting edge portion and t is a plate thickness of the plate material. The cutting method of the circular member according to claim 8 or 9 . Of the at least two circular members adjacent to each other, when cutting out one of the circular members, a part of the other circular member is cut to form a notch in at least one portion of the circular member The cutting method of the circular member of Claim 8 or 9 characterized by the above-mentioned. The circular member cutting method according to any one of claims 8 to 11 , wherein the circular member is a CCD panel used for a lens portion of a CCD camera.

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