JP2007237558A - Method for cutting ceramic honeycomb molding and circular cutting blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for cutting a ceramic honeycomb molding which prevents the occurrence of a defect of the fusion or chipping of a cell, an edge chip, or the like when the ceramic honeycomb molding is cut exactly in a prescribed size, can make chips entering the cell minute, and is excellent in chip removing properties after the cutting and a circular cutting blade. <P>SOLUTION: In the method for cutting the ceramic honeycomb molding, the circular cutting blade in which a plurality of cutting tips 21 each having an approximately reverse V-shaped cross section of an edge side are joined at constant intervals to the circumference end part of a circular base 22 at a rake angle of at least 8° is used. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for cutting a ceramic honeycomb formed body and a circular cutting blade.

  A ceramic honeycomb exhaust gas filter is used as an exhaust gas purification device for removing fine particles discharged from a diesel vehicle. With catalyst-supported ceramic honeycomb exhaust gas filters, with the recent increase in exhaust gas regulations, it has been demanded that pressure loss does not increase significantly even after catalyst support. Porosity has been required. For this reason, as a means for obtaining a ceramic filter with a high porosity, there has been a case in which a method of adding resin particles such as an acrylic resin as an organic material as a pore forming material to the ceramic raw material composition has been taken (for example, Patent Document 1). And 2).

  In general, in the production of ceramic filters, a raw ceramic honeycomb molded body that has been continuously extruded is once cut into approximately a certain length immediately after extrusion, and moisture in the molded body is removed by electromagnetic waves, hot air drying, etc. After complete drying by means and drying shrinkage, an accurate cut before firing is applied. Since the cut surface at the time of cutting becomes the appearance surface of the final ceramic fired body, the cutting quality also affects the quality and yield in the next step such as the sealing step after cutting. Therefore, there are no appearance defects such as chipping and in-cell chipping (hereinafter referred to as chipping), no burrs due to fusion on the cut surface, and no chips inside the cell after cutting. Required. Of the required cutting quality, in order to solve the problem of chipping and chipping, in the cutting method using a rotating grindstone, the cross-sectional shape of the outer peripheral end of the rotating grindstone is made substantially V-shaped, thereby preventing the chipping and chipping. Concentrated stress from the corner portion of the rotating grindstone applied to the work material that is the cause is suppressed below the breaking strength, and it is possible to prevent chipping (see, for example, Patent Document 3).

  On the other hand, as a method of removing burrs on the cut surface and chips inside the cell after cutting, air is blown out from the through hole in the cut part of the ceramic molded body, and at the same time, brushing of the cut surface is performed. A method for removing burrs has been disclosed (see, for example, Patent Document 4).

JP 2003-175307 A (Claims) Japanese Patent Laying-Open No. 2005-47796 (Claims) JP 2003-53723 A (Claims, FIG. 1) Japanese Unexamined Patent Publication No. 2000-43024 (Claims, FIG. 3)

  However, in recent years, a large number of resin particles such as acrylic resin, which is an organic material, have been added to ceramic honeycomb molded bodies in order to increase the porosity. In such a ceramic honeycomb formed body, when a cutting blade having a substantially V-shaped cutting edge as described above can be used for cutting, chipping and chipping can be prevented. Due to the heat generated by the frictional resistance at the time, the added resin particles melt and adhere to the surface of the blade, causing a so-called clogging state, and the cutting ability is completely lost. In addition, as another problem, when the cutting is performed under high-speed cutting conditions, the cell of the cut surface is crushed by the fusion product composed of the resin component of the molten resin particles and the ceramic inorganic component chips, so sacrifice productivity. The cutting speed had to be greatly reduced. Even if the cutting speed is reduced, the fine ceramic inorganic component chips generated during cutting and the resin component of the molten resin particles described above are mixed and re-solidified, and the chip pieces grow as the cutting progresses. The phenomenon of entering the cell on the side occurred. The chips that have entered the cell in this manner remain in the cell and solidify in a size and shape equal to the cell width. Therefore, even if sufficient air blowing is performed using the air blowing device as described above, the chip remains in the cell. It has become difficult to remove completely. If the chips are fired while remaining in the cell, they are sintered with the chips remaining in the cell. Therefore, the generation of cell through-holes due to partial abnormal heat generation during firing and an increase in pressure loss due to filter channel blockage, etc. Since it becomes a defect, it is necessary to air blow carefully by hand again, which raises the problem of increasing production costs.

  In order to solve such problems, the present invention has a good cut surface quality after cutting and easy to remove residual chips even in a ceramic honeycomb molded body to which an organic material is added as a main raw material other than inorganic. It is an object of the present invention to provide a method for cutting a ceramic honeycomb formed body that can be removed and a circular cutting blade therefor.

  The present invention provides a circular cutting blade in which a plurality of cutting tips having a substantially inverted V-shaped cross-sectional shape on the side surface of the cutting edge are joined to a circumferential end of a circular base at a rake angle of 8 ° or more at regular intervals. There is provided a method for cutting a ceramic honeycomb formed body, characterized by being used.

  Further, the present invention provides a circular cutting in which a plurality of cutting tips having a substantially inverted V-shaped cross-sectional shape on the side surface of the cutting edge are joined to a circumferential end portion of a circular base at a rake angle of 8 ° or more at regular intervals. Provide a blade.

  According to the present invention, when cutting a ceramic honeycomb formed body, even if it is cut under high-speed cutting conditions, it does not cause fusing or burr accompanying the fusing on the cut surface, and also prevents the chipping and chipping. It is possible to provide a cutting method that has good chip removability after cutting.

  According to the first and seventh aspects of the present invention, a circular cutting blade is used in which a plurality of cutting tips having a substantially inverted V-shaped cross-sectional shape on the side surface of the blade edge are joined to the circumferential end of the circular base at regular intervals. Thus, the following effects are obtained.

  (1) In cutting a ceramic honeycomb molded body in which a large amount of resin particles such as acrylic resin is added as an organic material in the ceramic raw material composition, a cutting blade is used as compared with the case of grinding using a rotating grindstone as in the past. Since a certain cutting tip is intermittently arranged, the air cooling effect is great, and it has the effect of greatly suppressing heat generation during cutting, so there is no concern of fusing on the blade surface or the cut surface of the work material .

  (2) In the conventional rotating grindstone, in order to suppress the heat generation at the time of cutting, the cutting speed has to be reduced. However, according to the present invention, the heat generation at the time of cutting is suppressed even under high speed cutting conditions. There is no need to reduce the speed, and high productivity can be realized.

  (3) Compared with the method of cutting while cutting with a rotating grindstone, cutting with a cutting tip results in cutting while notching with a cutting tip, so there is no burr due to fusion, no roughening of the cutting surface, and high quality. Cutting can be done.

  (4) Further, as another effect of the substantially inverted V-shaped cutting tip, there is an effect that chips at the time of cutting are refined. This is because when cutting is performed with a flat cutting tip whose cross-sectional shape on the side surface of the blade edge is not substantially inverted V-shaped, the chips are generated in a shape equal to the width of the cutting tip. This is because it is subdivided. For this reason, the finely divided chips can be easily removed without remaining even if they enter the cell.

  (5) Moreover, in the circular cutting blade of this invention, the rake angle of a cutting tip is 8 degrees or more. As the rake angle is increased, the free-cutting property is increased, so that the cutting resistance is reduced, and the effect of suppressing the heat generation, the refinement of chips, and the effect of easily discharging are recognized. The rake angle referred to here is generally a circular cutting blade (commonly referred to as a chip saw) in which a plurality of cutting tips are joined to a circumferential end portion of the circular substrate at regular intervals, and the center of the circular substrate and each cutting. It refers to the angle at which the rotational end face (referred to as the rake face) of each cutting tip intersects the line connecting the apex of the tip of the tip of the tip.

  According to the invention of claim 2, by using a circular cutting blade having an inverted V-shaped portion of the cutting tip having an angle of 120 ° or less, the cutting tip is cut when the honeycomb formed body having a fine cell structure is cut. Since it has the effect of dispersing the stress concentration at the tip of the blade tip when intermittently hitting the honeycomb wall surface, it is possible to prevent chipping and chipping of the cell wall surface.

  According to the invention of claim 3, since a circular cutting blade having a flat portion with a width of 1 mm or less is used at the center of the tip of the inverted V-shaped portion of the cutting tip, the effect of reducing frictional resistance and preventing fusion is obtained. It is done. That is, the cutting edge resistance decreases as the flat portion decreases. On the contrary, when the flat portion is close to the blade width of the cutting tip, heat generation due to frictional resistance at the time of cutting increases, so that the resin component is fused. In the present invention, by setting the flat portion to 1 mm or less, smooth cutting performance due to a reduction in cutting resistance at the time of cutting and an effect of preventing fusion due to a decrease in heat generation can be obtained.

  According to the invention of claim 4, since a circular cutting blade having a blade width of 3 mm or less in the front direction of the cutting tip is used, an effect of reducing heat generation due to a decrease in cutting resistance at the time of cutting and accompanying fusion prevention is obtained. It is done.

  According to the invention of claim 5, since the ceramic honeycomb molded body is a dried body obtained by drying the honeycomb after being formed, even if the ceramic honeycomb molded body is cut under high-speed cutting conditions, fusion and burrs associated therewith are generated on the cut surface. In addition, chipping and chipping can be prevented, and chip removability after cutting is improved.

  According to the invention of claim 6, when the total solid content in the ceramic raw material composition is 100% by volume, the organic material is blended in an amount of 50% by volume or more. Therefore, the effects of the inventions of claims 1 to 5 are effectively exhibited. Is done.

  FIG. 1 is a partially enlarged front view showing a substantially upper half of a circular cutting blade used in the method for cutting a ceramic honeycomb molded body according to the present invention. A plurality of cutting chips having a substantially inverted V-shaped cross section are joined at regular intervals.

  In the present invention, the cross-sectional shape of the side surface of the cutting edge of the cutting tip 21 is a substantially inverted V shape, which is not only a simple inverted V shape but also slightly deformed from an inverted V shape, as shown in the examples described later. However, it includes a shape that allows an inverted V shape to be imaged as a whole, and is not limited to a complete inverted V shape. In addition, the inverted V shape includes a shape (convex shape) having a flat portion at the center of the tip of the inverted V-shaped cutting edge.

  In FIG. 1, a indicates the rake angle of the cutting tip, and it is necessary that the rake angle a is 8 ° or more. When the rake angle a is less than 8 °, the vertical component of the impact force acting directly on the wall surface of the ceramic honeycomb formed body 1 (see FIG. 2) increases, so that chipping and cell chipping occur. The problem arises. The upper limit value of the rake angle “a” is a design requirement related to the diameter of the blade and the number of blades. Preferably, the angle is 10 ° or more.

  Further, a tangent line L orthogonal to the vertex i of the cutting edge tip 24 and the line connecting the vertex i of the cutting edge tip 24 of the cutting tip 21 and the center point o of the circular base 22 shown in FIG. The angle b formed by the circumferential end surface 25 of the blade tip 24 is generally referred to as a clearance angle, and the circumferential end surface 25 is referred to as a clearance surface. In order to reduce the frictional resistance and prevent fusion due to heat generation, it is desirable to provide a clearance angle b of 10 ° or more.

  FIG. 2 is a schematic view schematically showing the cutting method of the present invention. In FIG. 2, 1 indicates a ceramic honeycomb formed body, and 22 indicates a circular base.

  In FIG. 2, reference numeral 23 denotes a circumferential end portion (peripheral portion) of the circular cutting blade. In FIG. 3, the cutting tip 21 (not shown) having a substantially V-shaped cross-sectional shape is a circumferential end of the circular base 22. A plurality of parts are joined to the part at regular intervals. Hereinafter, the joined body of the circular base 22 and the cutting tip 21 is referred to as a circular cutting blade 2. In FIG. 2, the ceramic honeycomb molded body 1 is arranged in a direction orthogonal to the circular cutting blade 2, and the circular cutting blade 2 rotates on the lower surface side (or upper surface side) before the end of the illustrated ceramic honeycomb molded body. The ceramic honeycomb formed body 1 is completely cut by starting cutting and completely passing through to the upper surface side (or lower surface side).

  Although not shown in FIG. 2, circular cutting blades 2 are similarly arranged oppositely on the back side of the end portion of the ceramic honeycomb formed body 1 so that both end portions of the ceramic honeycomb can be cut simultaneously. In this way, by arranging the circular cutting blade 2 so as to cut the width direction between the upper and lower surfaces of the honeycomb honeycomb molded body 1 from the lower surface side to the upper surface side (or from the upper surface side to the lower surface side), Since the moving stroke of the cutting blade 2 can be minimized, the cutting tact can be shortened, and the productivity can be increased, it is desirable to have such an arrangement. However, the present invention is not limited to this. Even when the circular cutting blade 2 is rotated at a fixed position and the ceramic honeycomb formed body is moved up and down or left and right for cutting, the same effect can be obtained without any problem.

  The disc-shaped circular base 22 in the present invention is a circular cutting blade 2 in which a plurality of cutting tips 21 are joined at regular intervals to the circumferential end thereof, and this circular cutting blade 2 rotates at high speed. Therefore, it is necessary to select a material having sufficient rigidity that does not cause chatter and vibration, smoothness of the substrate surface, durability to withstand repeated use, and the like. As a material that satisfies these requirements, it is desirable to use, for example, high-speed tool steel. Although not shown in the figure, for the purpose of preventing chatter and vibration, if a base with slits machined at a pitch different from the arrangement interval of the cutting tips 21 is used at the circumferential end of the circular base 22, chatter is used. It is effective for preventing vibration.

  Further, the thickness of the circular base 22 is a factor that directly affects the rigidity of the circular cutting blade 2 and is related to the design requirements related to the diameter of the circular cutting blade 2, but it is preferably about 1 mm or more. Further, as the material of the cutting tip 21, for example, when a super hard material typified by a Wc—Co alloy or the like having excellent mechanical properties is used as the cutting tip 21, even if the sharpness is reduced due to wear of the blade edge, re-polishing Since it can be re-used several times, it is desirable in terms of cost. If the cost is met, an ultra-hard material such as diamond that is more durable can be selected as the material of the cutting tip 21. If diamond tips are used, the number of durable cuts leading to blade edge wear will be greatly improved, and the need for frequent blade replacement will be eliminated, thus improving maintainability.

  FIG. 3 is an enlarged side view of a main part of the circular cutting blade 2 having a cutting tip 21 having a substantially inverted V shape.

  In FIG. 3, d indicates an angle formed by the intersection of the substantially inverted V-shaped extension lines in the side surface direction of the blade tip 24, and this angle d is preferably 120 ° or less. If this angle d exceeds 120 °, the intersection angle g at the contact j between the tapered surface inclined from the tip of the cutting edge tip portion 24 of the cutting tip 21 and the base portion 29 of the cutting tip 21 approaches from an obtuse angle to an acute angle. The stress dispersion effect at the time of cutting the wall surface of the cell is reduced, and there is a risk of chipping due to stress concentration.

  In FIG. 3, e indicates the width of the flat portion 26 provided at the center of the tip of the substantially inverted V-shaped portion in the side surface direction of the cutting edge tip 24 of the cutting tip. As the width e of the flat portion 26 is narrower, the resistance of the cutting edge at the time of cutting is reduced, but the wear of the tip portion becomes severe, so that the durability is lowered. Conversely, when the width e of the flat portion 26 is close to the blade width f in the side surface direction of the cutting tip 21, heat generation due to frictional resistance during cutting increases. For this reason, from the viewpoint of preventing fusion, the width e of the flat portion 26 is desirably 1 mm or less, although it also relates to the blade width f in the side surface direction of the cutting tip 21. If the width e of the flat portion 26 exceeds 1 mm, the ratio of the width e of the flat portion 26 to the blade width f of the cutting tip 21 increases, so that the effect of making chips fine is reduced, and chip removal after cutting is performed. May cause problems with sex.

  In FIG. 3, the blade width f in the side surface direction of the cutting tip 21 is desirably 3 mm or less from the viewpoint of suppressing heat generation due to the frictional resistance and preventing fusion. Further, it is desirable to provide a clearance of about 1 ° with respect to an angle c formed by the surface 27 parallel to the surface of the circular base 22 and the base portion 29 of the cutting tip 21 at the contact j. By providing this relief, as cutting progresses, friction is generated between the side surface of the cutting tip 21 and the cut surface of the work material, and generation of fusion due to heat generation can be prevented.

  In addition, the ceramic honeycomb formed body is a dried body obtained by drying the honeycomb, and even when cut under high-speed cutting conditions, the cut surface does not cause fusing or burr accompanying the fusing, It is desirable in that it can prevent chipping and can perform cutting with good chip removal after cutting.

  Further, in the ceramic honeycomb molded body, when the total solid content in the ceramic raw material composition is 100% by volume, it is preferable that 50% by volume or more of an organic material is blended as a main raw material other than the inorganic material. In particular, the above-described effects are effectively exhibited.

  Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples, but this description does not limit the present invention.

[Example 1]
As the circular cutting blade 2 having the configuration of FIG. 1 and FIG. 3, a blade width of 1.5 mm made of cemented carbide at the base circumferential end of a circular base 22 having a thickness of 1 mm made of high-speed tool steel and a diameter h of 305 mm. 96 cutting chips 21 are joined at equal intervals,
As (Example 1), an angle d formed by the inverted V shape of the cutting edge cross section is 90 °, and a cutting tip whose width e of the flat portion 26 at the center of the cutting edge tip 24 is 0.5 mm is used.
As (Example 2), an angle d formed by the inverted V-shape is 120 °, and a cutting tip having a width e of the flat portion 26 at the center of the blade tip portion 24 of 0.5 mm is used.
As (Comparative Example 1), the width e of the flat part at the tip of the blade edge shown in FIG. 4 is equal to the blade width f and does not form an inverted V shape, that is, the cutting edge has an angle of 180 ° and d = 0 °. Was used.

  Further, as the arrangement of the cutting tips, a circular cutting blade of 305 mm, in which 96 pieces of the same cutting tips arranged so as to have a rake angle of 10 °, were joined at equal intervals, was used.

  The ceramic honeycomb formed body has an outer diameter of 55 mm, a cell size of 1.5 mm, a cell wall thickness of 0.3 mm, and an outer shell thickness of 0.3 mm, and the total solid content in the ceramic raw material composition is 100% by volume. In this case, dry body samples containing 30% by volume, 50% by volume, and 70% by volume of organic materials were used as main raw materials other than inorganic materials.

  Cutting conditions were as follows: the rotational speed of the circular cutting blade was 2000 rpm, and the feed speed of the circular cutting blade was 35 mm / sec. The obtained ceramic honeycomb cut body is moved to the chip removal stage, and the brush 31 of the pulsed air blowing nozzle 3 (shock gun) with brush is brought into contact with one side of the cut surface of the ceramic honeycomb cut body 11 shown in FIG. While reciprocating back and forth (5 reciprocations / 10 sec), dry air with a pressure of 0.5 Mpa is blown out, and chips discharged from the cut surface on the opposite side of the ceramic honeycomb cut body are sucked by the dust collection duct 4 Chip removal was performed for 10 seconds. Thereafter, the ceramic honeycomb cut body was moved to the next chip removal stage in which the arrangement of the pulsed air blowing nozzle with brush and the dust collection duct was reversed, and the chips on the opposite cut surface were similarly removed. Thereafter, the presence / absence of chipping of the cut surface and the amount of residual chips were observed, and the results were evaluated in three stages of ○ Δ ×. The results are shown in Table 1. In addition, (circle) shows that it is a sufficiently high level, (triangle | delta) shows that it is an allowable level depending on the case, and x shows the case where it is less than an allowable level, but the blade edge angle is 90 degrees (Example 1). In the case of 120 ° (Example 2), no chipping or residual chips were observed.

[Example 2]
Next, as a circular cutting blade having the configuration of FIGS. 1 and 3, a cutting edge having a blade width f of 1.5 mm made of a super hard material at a circumferential end portion of a circular base 22 having a thickness of 1 mm made of high-speed tool steel. As the shape of the tip 21, a cutting tip 21 in which the angle formed by the substantially V-shaped cutting edge section is 120 ° and the width e of the flat portion 26 at the center of the blade tip 24 is 0.5 mm is used. The rake angle was set to 5 ° (Comparative Example 2), the rake angle set to 10 ° (Example 3), and the rake angle set to 30 ° (Example 4). Using the circular cutting blade 2 having a diameter h of 305 mm, joined with 96 of the above-mentioned cutting chips at equal intervals, using the same ceramic honeycomb dried body sample as in Example 1, and cutting under the same cutting conditions as in Example 1, then cutting chips Removal was performed, and evaluation was performed according to the same criteria as in Example 1. The results are shown in Table 2. When the rake angle was 10 ° (Example 3) and 30 ° (Example 4), no chipping or residual chips were observed.

[Example 3]
Next, as (Comparative Example 3), as shown in FIG. 5, the tip of the blade tip 24 has a convex shape of 60 ° on the outer periphery of the metal base, and # 80 diamond is electrodeposited. A rotating grindstone having a diamond portion 28 width of 1.5 mm and a diameter of 305 mm was used.

  As (Embodiment 5), as a circular cutting blade 2 having the configuration of FIGS. 1 and 3, a blade width 1 made of cemented carbide at the base circumferential end of a circular base 22 having a thickness of 1 mm made of high-speed tool steel. As the shape of the cutting tip of 5 mm, the cutting tip 21 in which the angle formed by the substantially V shape of the cutting edge section is 90 ° and the width e of the flat portion 26 at the center of the blade tip 24 is 0.5 mm is used. As the arrangement of No. 21, a circular cutting blade 2 having a diameter of 305 mm and having 96 cutting tips arranged at a rake angle of 30 ° and joined at equal intervals was used.

  Using the same ceramic honeycomb dried body sample as in Example 1, after cutting under the same cutting conditions as in Example 1, chip removal is performed, and then the fused state of the cut surface is observed in addition to the presence or absence of chipping on the cut surface and the amount of residual chips. Evaluation was performed using the same criteria as in Example 1. The results are shown in Table 3, and in the case of a diamond cutter having a tip shape of 60 °, when the ceramic honeycomb molded body (Comparative Example 3) in which the blending ratio of the organic material exceeds 50% by volume is cut, the cut surface is fused. Moreover, deterioration of the amount of residual chips was recognized.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a cutting method suitable for cutting a ceramic honeycomb molded body because the ceramic honeycomb molded body can be cut with high productivity and high quality and has good chip removal properties after cutting.

The partial front enlarged view which shows the substantially upper half of the circular cutting blade used for the cutting method of the ceramic honeycomb molded object of this invention Schematic diagram schematically showing the cutting method of the present invention Side enlarged view of the main part of a circular cutting blade having a cutting tip having a substantially inverted V shape Side surface enlarged view of the principal part of the circular cutting blade which has the cutting tip of the comparative example (comparative example 1) which concerns on Example 1 Schematic diagram schematically showing the basic configuration of a rotating grindstone of a comparative example (Comparative Example 3) according to Example 3 Explanatory drawing of the chip removal method which concerns on Examples 1-3

Explanation of symbols

1: Ceramic honeycomb molded body 2: Circular cutting blade 3: Pulsed air blowing nozzle with brush 4: Dust collection duct 11: Ceramic honeycomb cutting body 21: Cutting tip 22: Circular base 23: Circumferential end 24: Cutting edge front 25: Flank 26: Flat part 27: Tangent line 28: Diamond part 29: Base part of cutting tip 31: Brush a: Rake angle b: Relief angle c: Relief angle d: V-shaped angle of cutting tip e: Cutting edge of cutting tip F: Blade width of the cutting tip h: Diameter of the circular base i: Top of the tip of the blade tip j: Contact point between the tapered surface inclined from the tip of the tip of the blade tip and the base of the cutting tip o: Circular base Center point L: Tangent

Claims (7)

  A circular cutting blade is used in which a plurality of cutting tips having a substantially inverted V-shaped cross-sectional shape on the side surface of the cutting edge are joined to each other at a peripheral edge of a circular base at a rake angle of 8 ° or more at regular intervals. A method for cutting a ceramic honeycomb formed body.   The method for cutting a ceramic honeycomb formed body according to claim 1, wherein a circular cutting blade having an angle of 120 ° or less forming a substantially inverted V-shaped portion of the cutting tip is used.   The method for cutting a ceramic honeycomb molded body according to claim 1 or 2, wherein a circular cutting blade having a flat portion having a width of 1 mm or less is used at the center of the tip of the substantially inverted V-shaped portion of the cutting tip.   The method for cutting a ceramic honeycomb molded body according to any one of claims 1 to 3, wherein a circular cutting blade having a blade width in a side surface direction of the cutting chip of 3 mm or less is used.   The method for cutting a ceramic honeycomb molded body according to any one of claims 1 to 4, wherein the ceramic honeycomb molded body is a dried body obtained by drying a honeycomb after being molded.   The ceramic according to any one of claims 1 to 5, wherein the ceramic honeycomb formed body is a mixture of 50% by volume or more of an organic material when the total solid content in the ceramic raw material composition is 100% by volume. A method for cutting a honeycomb formed body. A circular cutting blade in which a plurality of cutting tips having a substantially inverted V-shaped cross-sectional shape on the side surface of the cutting edge are joined to a circumferential end of a circular base at a rake angle of 8 ° or more at regular intervals.

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