WO2013133118A1 - 溶射被膜面の仕上げ加工方法、及び、加工用工具 - Google Patents
溶射被膜面の仕上げ加工方法、及び、加工用工具 Download PDFInfo
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- WO2013133118A1 WO2013133118A1 PCT/JP2013/055371 JP2013055371W WO2013133118A1 WO 2013133118 A1 WO2013133118 A1 WO 2013133118A1 JP 2013055371 W JP2013055371 W JP 2013055371W WO 2013133118 A1 WO2013133118 A1 WO 2013133118A1
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- Prior art keywords
- tool
- cutting tool
- cutting
- thermal spray
- rotary
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- 239000007921 spray Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005520 cutting process Methods 0.000 claims abstract description 165
- 238000005507 spraying Methods 0.000 claims abstract description 41
- 239000011248 coating agent Substances 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 16
- 238000007730 finishing process Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 10
- 238000007788 roughening Methods 0.000 claims description 10
- 238000003672 processing method Methods 0.000 claims 4
- 235000019589 hardness Nutrition 0.000 description 89
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000007769 metal material Substances 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 239000005002 finish coating Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/18—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/08—Flame spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/007—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
- B23B29/02—Boring bars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
- B23B41/12—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for forming working surfaces of cylinders, of bearings, e.g. in heads of driving rods, or of other engine parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/14—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying for coating elongate material
- C23C4/16—Wires; Tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
- B05B13/0627—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies
- B05B13/0636—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies by means of rotatable spray heads or nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2215/00—Details of workpieces
- B23B2215/24—Components of internal combustion engines
- B23B2215/242—Cylinder liners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/12—Boron nitride
- B23B2226/125—Boron nitride cubic [CBN]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/909—Having peripherally spaced cutting edges
Definitions
- the present invention provides a method for finishing a sprayed coating surface by performing a finish processing on a sprayed coating formed on a roughened inner surface of a cylindrical member [cylindrical hollow member]. a method for a finishing work of a spray-coated surface] and a tool therefor.
- Patent Document 1 discloses a surface roughening work on the inner surface of a cylinder bore.
- a helical groove is formed on the inner surface using a cutting tool.
- the adhesion of the thermal spray coating can be enhanced more than the surface roughening processing such as shot blasting.
- a honing process is implemented as a finishing process with respect to a sprayed-coating surface.
- the rough surface having the spiral groove is formed with a depressed portion corresponding to the thread groove in the inner screw thread and a projected portion corresponding to the crest. Is formed.
- the thermal spray coating is formed by injecting the molten metal from the nozzle of the thermal spray gun. At this time, the molten metal is sprayed from the nozzle onto the rough surface while being moved in the axial direction while the thermal spray gun is rotated.
- the thermal spray coating on the projections tends to have a higher hardness than the thermal spray coating on the depressions. That is, in the thermal spray coating, the high hardness portion on the convex portion and the low hardness portion on the concave portion are mixed. The high hardness portion and the low hardness portion are each formed in a spiral shape. However, if the finish coating (honing processing) is simply performed on the thermal spray coating in which the high hardness portion and the low hardness portion are mixed, the processing efficiency is poor.
- An object of the present invention is to provide a method of finishing a thermally sprayed coating surface, and a processing tool, which can efficiently finish a thermally sprayed coating surface having uneven hardness.
- a first feature of the present invention is a method of finishing a sprayed coating surface, wherein a helical groove is formed on the inner surface of a cylindrical member to roughen the surface, and the sprayed coating is formed on the roughened inner surface.
- a method of finishing a sprayed coating surface is provided, which is formed and cut and finished by spraying the sprayed coating along a spiral of the groove with a cutting tool.
- a second feature of the present invention is for finish processing of a sprayed coating surface, which is performed by cutting and finishing a sprayed coating formed on the inner surface of a roughened cylindrical member in which a spiral groove is formed.
- a tool comprising: a cutting tool for cutting the thermal spray coating along a spiral of the groove; and a tool support on which the cutting tool is mounted and which can be rotated and linearly moved in the rotational axis direction.
- a tool for finishing a sprayed coating surface is provided.
- FIG. 1 is a side view showing a state in which a thermal spray coating on the inner surface of a cylinder bore is cut using a first embodiment of a finishing tool.
- Fig.2 (a) is sectional drawing which shows the roughened cylinder bore inner surface before thermal spray coating formation
- FIG.2 (b) is the state which forms the thermal spray coating on the roughened cylinder bore inner surface. It is a sectional view showing.
- FIG. 3 is a cross-sectional view showing a state in which the inner surface of the cylinder bore is roughened.
- FIG. 4 is a side view showing a state in which the thermal spray coating on the inner surface of the cylinder bore is cut using the second embodiment of the finishing tool.
- FIG. 5 is a perspective view showing a rotary bit of the tool shown in FIG.
- FIG. 6 is a side view showing a state in which the thermal spray coating on the inner surface of the cylinder bore is cut using the third embodiment of the finishing tool.
- FIG. 1 shows a first embodiment of a thermal spray coated surface processing tool (finishing method).
- a cylinder block (cylindrical member) 1 of an internal combustion engine processed by a processing tool is made of an aluminum alloy, and one or more cylinder bores 3 are formed. (Only one cylinder bore 3 is shown in FIG. 1). On the cylinder bore inner surface 3 a of the cylinder bore 3, a thermal spray coating 5 made of an iron-based metal material is formed.
- the processing tool is a boring bar (tool support member) 7 capable of linear movement in the rotational axis direction while rotating, and a first cutting tool attached to the boring bar 7 (first cutting tool) 9 and a second cutting tool [second cutting tool] 11 are provided.
- the cutting tools 9 and 11 of the present embodiment are tip tool bits and are fixed to the tip of the boring bar 7.
- the thermal spray coating 5 has a high hardness portion and a low hardness portion, and in the finishing process, the first cutting tool 9 cuts the low hardness portion, and the second cutting tool 11 has a high hardness portion. Cut.
- a cutting edge (rake edge) 9 a is provided at the tip of the first cutting tool (chip bit) 9, and a cutting edge 11 a is provided at the tip of the second cutting tool (tip bit) 11.
- the inner surface 3a of the cylinder bore 3 before the thermal spray coating 5 is formed is roughened by forming a spiral groove 12.
- the cylinder bore inner surface 3a is cut by a cutting tool (see the cutting tool 17 shown in FIG. 3) attached to a boring bar (not shown), and the cylinder bore inner surface 3a is roughened.
- the concave portion 13 and the convex portion 15 adjacent to the concave portion 13 are formed by the spiral groove 12.
- a cutting tool 17 for roughening as shown in FIG. 3
- the top of the convex portion 15 is cut and crushed to form a [fractural face] 19.
- the fractured surface 19 improves the adhesion of the thermal spray coating 5.
- the cutting tool 17 is the same as the cutting tool described in Japanese Patent Application Publication No. 2006-159389 (International Publication WO 2006/061695 A1) filed by the applicant of the present application.
- a recess 13 is formed by the cutting edge 17 a at the tip of the cutting tool 17.
- a projection 17c is formed on the inclined surface 17b formed in the vicinity of the cutting edge 17a.
- the inclined surface 17 b cuts and crushes the top of the protrusion 15 to form a fracture surface 19.
- the sprayed metal 5 is sprayed from the thermal spray gun 21 shown in FIG. 2B on the rough surface formed by the concave portions 13 and the convex portions 15 (the fracture surface 19) to form the thermal spray coating 5.
- the thermal spray gun 21 is rotated about the axis of the cylinder bore 3 and moved in the direction of the axis, the spray metal droplets 25 of the sprayed metal are sprayed from the nozzle 23 onto the cylinder bore inner surface 3a.
- the sprayed droplets 25 adhere to the inner surface 3 a of the cylinder bore to form the thermal spray coating 5.
- the sprayed metal oxidizes the sprayed metal, and as a result, the sprayed coating 5 on the convex portion 15 (the fracture surface 19) has higher hardness than the sprayed coating 5 on the recess 13. That is, in the thermal spray coating 5, the high hardness portion 27 on the convex portion 15 and the low hardness portion 29 on the concave portion 13 are mixed (see FIG. 2B).
- the high hardness portion and the low hardness portion are each formed in a spiral shape (that is, the hardness of the thermal spray coating 5 is nonuniform).
- the thermal spray coating 5 thus formed is subjected to finish processing using the boring bar 7 shown in FIG.
- a first cutting tool 9 for low hardness and a second cutting tool 11 for high hardness are attached to the tip of the boring bar 7.
- the first cutting tool 9 and the second cutting tool 11 are fixed to the boring bar 7 at positions separated by 180 degrees with respect to the rotation axis of the boring bar 7.
- the first cutting tool 9 for low hardness is a CBN tool containing cBN (cubic boron nitride) particles in a volume ratio of 40% or more and less than 90%. If the cBN particle content is less than 40%, the wear of the first cutting tool 9 is promoted at the time of cutting the low hardness portion 29, and if it is 90% or more, the component constituting the low hardness portion 29 is 1 It adheres to the cutting tool 9.
- the second cutting tool 11 for high hardness is a CBN tool containing cBN particles at 85% or more by volume ratio. If the cBN particle content is less than 85%, the wear of the second cutting tool 11 is promoted when the high hardness portion 27 is cut.
- the surface of the thermal spray coating 5 is cut.
- the first cutting tool 9 cuts the low hardness portion 29 and the second cutting tool 11 cuts the high hardness portion 27, so that the boring bar 7 (that is, the first cutting tool 9 and the second cutting tool 11).
- the rotation speed and feed amount of) are adjusted.
- the number of rotations and the amount of feed are matched to the number of rotations and the amount of feed of the cutting tool 17 (see FIG. 3) at the time of roughening processing, for example, the number of rotations is 3000 rpm and the feed amount is 0.25 mm / rev. It is.
- the rotation direction of the boring bar 7 (that is, the first cutting tool 9 and the second cutting tool 11) is also matched with the rotation direction of the cutting tool 17 at the time of roughening.
- the first cutting tool 9 is reliably moved along the spiral of the low hardness portion 29 so that the low hardness portion 29 can be cut accurately.
- the second cutting tool 11 is reliably moved along the spiral of the high hardness portion 27 so that the high hardness portion 27 can be cut accurately. That is, since the first cutting tool 9 continuously cuts the low hardness portion 29 having uniform hardness, machining efficiency can be improved, and its wear can be suppressed. Similarly, since the second cutting tool 11 continuously cuts the high hardness portion 27 having uniform hardness, machining efficiency can be improved and its wear can be suppressed.
- honing is implemented as final finishing.
- the first cutting tool 9 and the second cutting tool 11 are fixed to the boring bar 7 at positions separated by 180 degrees with respect to the rotation axis of the boring bar 7. It is preferable that the first cutting tool 9 and the second cutting tool 11 be separated by 180 degrees because the cutting forces are balanced.
- the thermal spray coating 5 is cut along the spiral of the rough surface inside, and at this time, the low hardness portion 29 formed on the spiral recess 13 by the first cutting tool 9. Can be continuously cut, and the high hardness portion 27 formed on the helical convex portion 15 can be continuously cut by the second cutting tool 11 to perform finish processing efficiently.
- the low hardness portion 29 having uniform hardness is continuously cut by the first cutting tool 9, and the high hardness portion 27 having uniform hardness is continuous by the second cutting tool 11. Cut.
- the cutting object is respectively selected by the cutting tools (the first cutting tool 9 and the second cutting tool 11) having strength and rigidity (hardness) adapted to the cutting objects (the low hardness portion 29 and the high hardness portion 27) having different hardnesses. Cutting can be done reliably, and processing efficiency can be improved. Furthermore, since the wear of the cutting tool is suppressed, the life of the cutting tool can be extended.
- the low hardness portion 29 can be cut accurately by the first cutting tool 9, and The high hardness portion 27 can be cut accurately by the cutting tool 11. Furthermore, since the resistance force at the time of cutting the cylinder bore inner surface 3a is balanced, the rotation of the boring bar 7 is stabilized.
- the first cutting tool 9 is a CBN tool including cBN particles in a volume ratio of 40% to less than 90%
- the second cutting tool 11 includes cBN particles in an volume ratio of 85% or more Since it is a CBN tool, it is a cutting tool (first cutting tool 9 and second cutting tool 11) having strength and rigidity (hardness) adapted to cutting objects (low hardness portion 29 and high hardness portion 27) having different hardnesses.
- the object to be cut can be reliably cut, and the processing efficiency can be improved. Furthermore, since the wear of the cutting tool is suppressed, the life of the cutting tool can be extended.
- At least one of three conditions: rotational direction and axial direction feed amount, and (3) rotational speed, rotational direction and axial direction feed amount of the first and second rotary tools for the finishing process Two are matched with each other.
- the low hardness portion 29 and the high hardness portion 27 are formed to exactly correspond to the spiral of the concave portion 13 and the convex portion 15, and the low hardness portion 29 and the high hardness are obtained by the first cutting tool 9 and the second cutting tool 11.
- the hard portion 27 is cut accurately.
- the first cutting tool 9 and the second cutting tool 11 are fixed to the boring bar 7.
- the low hardness portion 29 and the high hardness portion 27 can be simultaneously cut, which is preferable in terms of processing efficiency.
- the high hardness portion 27 is cut using the boring bar to which only the second cutting tool 11 is attached. You may cut continuously.
- the low hardness portion 29 is cut using the boring bar to which only the first cutting tool 9 is attached. You may cut continuously.
- the rough surface of the cylinder bore inner surface 3a is formed of the spiral concave 13 and the convex 15 (broken surface 19), but the present invention is not limited to such a form.
- the rough surface of the cylinder bore inner surface 3a may be formed as a spiral groove such as a mere inner screw in which the fracture surface 19 is not formed. That is, the rough surface of the cylinder bore inner surface 3a may be formed to have a spiral.
- FIG. 4 shows a second embodiment of a thermal spray coated surface processing tool (finishing method).
- a first cutting tool 90 is provided instead of the first cutting tool 9 in the first embodiment
- a second cutting tool 110 is provided instead of the second cutting tool 11 in the first embodiment. .
- the first cutting tool 90 of the present embodiment is a first rotary tool bit 90
- the second cutting tool 110 is a second rotary bit 110.
- the first rotary bit 90 and the second rotary bit 110 are attached to the tip of the boring bar 7 at a distance of 180 degrees.
- the first rotary bit 90 (second rotary bit 110) is rotatably attached to a mount base 33 provided on a tool body 31 as shown in FIG. It is a throw-away type circular insert [throw-away type circular insert] which rotates around O.
- the tool body 31 is detachably attached to the boring bar 7, but is not shown in FIG. 1.
- the rake surface 9 a (11 a) of the first rotary tool 90 (second rotary tool 110) has a rake angle inclined with respect to the rotation axis of the boring bar 7.
- a component of the cutting force with respect to the main component of the cutting force is generated on the annular cutting edge 9b (11b) on the periphery of the rake face 9a (11a).
- this component force acts in the tangential direction of the peripheral edge to rotate the round tip, and cutting is performed on the entire circumference of the annular cutting edge 9b (11b).
- the material of the first rotary cutting tool 90 is the same as the above-described material of the first cutting tool 9 of the first embodiment.
- the material of the second rotary bit 110 is also the same as the above-described material of the second cutting tool 11 of the first embodiment.
- the three processing conditions (1) to (3) described above are also controlled in the same manner as in the first embodiment.
- the low hardness portion 29 is cut by the first rotary bit 90, and the high hardness portion 27 is cut by the second rotary bit 110. Therefore, since the entire circumference of the annular cutting edges 9b and 11b is used at the time of finishing, wear is further suppressed, and the life of the cutting tool can be further extended. As a result, the processing cost can also be reduced.
- the boring bar to which only the second rotary bit 110 is attached is used.
- the high hardness portion 27 may be cut continuously by using.
- the low hardness portion 29 is cut using the boring bar to which only the first rotary bit 90 is attached. You may cut continuously.
- FIG. 6 shows a third embodiment of a thermal spray coated surface processing tool (finishing method).
- a first chip cutting tool 35 and a second chip cutting tool 37 for finishing are fixed to the boring bar 7 with respect to the processing tool of the second embodiment.
- the first chip bit 35 and the second chip bit 37 are fixed to the boring bar 7 at a distance of 180 degrees.
- the first chip cutting tool 35 is made of the same material as the first cutting tool 9 of the first embodiment.
- the distance between the first chip cutting tool 35 and the first rotary cutting tool 90 along the rotation axis of the boring bar 7 is matched to the pitch of the recess 13 (the low hardness portion 29).
- the first chip bit 35 is disposed on the rear side (following side) of the tool feed direction with respect to the first rotary bit 90.
- the second chipping tool 37 is made of the same material as the second cutting tool 11 of the first embodiment.
- the distance between the second chip cutting tool 37 and the second rotary cutting tool 110 along the rotation axis of the boring bar 7 is equal to the pitch of the projections 15 (the high hardness portion 27).
- the second chipping tool 37 is disposed on the rear side (following side) of the second rotary cutting tool 110 in the tool feeding direction.
- the positions of the first tip bit 35 and the first rotary bit 90 do not have to be identical when viewed from the direction of the rotation axis of the boring bar 7 if it is the rear side in the tool feed direction.
- the positions of the second chip bit 37 and the second rotary bit 110 do not have to match when viewed from the direction of the rotation axis.
- the low hardness portion 29 is continuously cut by the first rotary bit 90, and the high hardness portion 27 is continuously cut by the second rotary bit 110.
- the low hardness portion 29 cut by the first rotary bit 90 is further precisely cut by the first chip bit 35, and the high hardness portion 27 cut by the second rotary bit 110 is also further precisely by the second chip bit 37. It is cut.
- the low hardness portion 29 is cut by the first chip cutting tool 35 after being cut by the first rotary cutting tool 90, and the high hardness portion 27 is cut by the second rotary cutting tool 110 after the second chip cutting tool It is cut by 37.
- the cutting surface by the rotary tool is rougher than the cutting surface by the chipping tool.
- the cylinder bore inner surface 3a after finishing in the present embodiment is finally cut by the first chip cutting tool 35 and the second chip cutting tool 37, it becomes smoother. As a result, it is possible to shorten the processing time of the honing process (final finishing process) after the finishing process.
- the distance between the first chip cutting tool 35 and the first rotary cutting tool 90 along the rotation axis of the boring bar 7 is matched to the pitch of the recess 13 (the low hardness portion 29) . Therefore, the low hardness portion 29 cut by the first rotary bit 90 is further smoothed by the first chip bit 35.
- the distance between the second chip cutting tool 37 and the second rotary cutting tool 110 is matched to the pitch of the convex portion 15 (high hardness portion 27). Therefore, the high hardness portion 27 cut by the second rotary bit 110 is further smoothed by the second chip bit 37.
- only the low hardness portion 29 is continuously cut using the boring bar to which only the first rotary bit 90 and the first tip bit 35 are attached.
- the high hardness portion 27 may be continuously cut using a boring bar to which only the two-chip cutting tool 37 is attached.
- only the first rotary bit 90 first chip bit 35 is attached.
- the low hardness portion 29 may be continuously cut using the boring bar.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Drilling And Boring (AREA)
- Drilling Tools (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
Description
Claims (15)
- 溶射被膜面の仕上げ加工方法であって、
円筒状部材の内面上に螺旋状の溝を形成して粗面化し、
粗面化された前記内面に溶射被膜を形成し、
切削工具によって前記溝の螺旋に沿って前記溶射被膜を切削して仕上げ加工を行う、溶射被膜面の仕上げ加工方法。 - 前記溝の形成によって、前記溝に対応する凹部と当該凹部に隣接する凸部とが、前記内面上に螺旋状にそれぞれ形成され、
前記仕上げ加工において、前記凹部の螺旋に沿って第1切削工具で前記溶射被膜を切削するとともに、前記凸部の螺旋に沿って第2切削工具で前記溶射被膜を切削する、請求項1に記載の溶射被膜面の仕上げ加工方法。 - (1)前記溝を形成するための工具の回転数、回転方向、及び、軸方向送り量、(2)前記溶射被膜を形成するための溶射ガンの回転数、回転方向、及び、軸方向送り量、並びに、(3)前記仕上げ加工のための前記切削工具の回転数、回転方向、及び、軸方向送り量、の三条件のうち少なくとも二つを互いに一致させる、請求項1又は2に記載の溶射被膜面の仕上げ加工方法。
- 前記第1切削工具が第1ロータリバイトであり、前記第2切削工具が第2ロータリバイトである、請求項2に記載の溶射被膜面の仕上げ加工方法。
- 前記仕上げ加工において、前記第1ロータリーバイトによる切削面を第1チップバイトでさらに切削すると共に、前記第2ロータリーバイトによる切削面を第2チップバイトでさらに切削する、請求項4に記載の溶射被膜面の仕上げ加工方法。
- (1)前記溝を形成するための工具の回転数、回転方向、及び、軸方向送り量、(2)前記溶射被膜を形成するための溶射ガンの回転数、回転方向、及び、軸方向送り量、並びに、(3)前記仕上げ加工のための前記第1及び第2ロータリバイトの回転数、回転方向、及び、軸方向送り量、の三条件のうち少なくとも二つを互いに一致させる、請求項4又は5に記載の溶射被膜面の仕上げ加工方法。
- 螺旋状の溝が形成されて粗面化された円筒状部材の内面上に形成された溶射被膜を切削して仕上げ加工を行う、溶射被膜面の仕上げ加工用工具であって、
前記溝の螺旋に沿って前記溶射被膜を切削する切削工具と、
前記切削工具が固定された、回転しつつ回転軸方向に直動可能な工具支持具とを備えている、溶射被膜面の仕上げ加工用工具。 - 前記切削工具が、前記溝に対応する凹部の螺旋に沿って前記溶射被膜を切削する第1切削工具と、前記凹部に隣接する凸部の螺旋に沿って前記溶射被膜を切削する第2切削工具とを有している、請求項7に記載の溶射被膜面の仕上げ加工用工具。
- 前記第1切削工具と前記第2切削工具とが、前記回転軸に対して180度隔てられた位置で、前記工具本体にそれぞれ固定されている、請求項8に記載の溶射被膜面の仕上げ加工用工具。
- 前記第1切削工具が、cBN粒子を体積比で40%以上90%未満含むCBN工具であり、前記第2切削工具が、cBN粒子を体積比で85%以上含むCBN工具である、請求項7~9のいずれか一項に記載の溶射被膜面の仕上げ加工用工具。
- 前記第1切削工具が第1ロータリバイトであり、前記第2切削工具が第2ロータリバイトである、請求項8に記載の溶射被膜面の仕上げ加工用工具。
- 前記第1ロータリーバイトと前記第2ロータリーバイトとが、前記回転軸に対して180度隔てた位置で、前記工具本体にそれぞれ固定されている、請求項11に記載の溶射被膜面の仕上げ加工用工具。
- 前記第1ロータリーバイトによる切削面をさらに切削する第1チップバイトと、前記第2ロータリーバイトによる切削面をさらに切削する第2チップバイトとをさらに備えている、請求項11又は12に記載の溶射被膜面の仕上げ加工用工具。
- 前記第1チップバイトが、前記第1ロータリーバイトに対して、前記回転軸の方向に沿って前記溝の螺旋ピッチ分隔てられた位置で、前記工具本体に取り付けられており、かつ、
前記第2チップバイトが、前記第2ロータリーバイトに対して、前記回転軸の方向に沿って前記溝の螺旋ピッチ分隔てられた位置で、前記工具本体に取り付けられている、請求項13に記載の溶射被膜面の仕上げ加工用工具。 - 前記第1ロータリーバイトが、cBN粒子を体積比で40%以上90%未満含むCBN工具であり、前記第2ロータリーバイトが、cBN粒子を体積比で85%以上含むCBN工具である、請求項11~14のいずれか一項に記載の溶射被膜面の仕上げ加工用工具。
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