Deburring tool, deburring device, grinding tool and grinding device

Abstract

For example, a deburring tool that can easily remove burrs formed at the ends of through holes with a diameter of about 2 to 3 mm or grooves with a width of about 2 to 3 mm, and a deburring device using this deburring tool are provided. [Solution] A deburring tool for removing burrs formed at the ends of through holes and / or at least partially through grooves in a workpiece having through holes and / or grooves that are visible from the outside has a cylindrical chuck portion (10), a shaft portion (20) having a diameter smaller than that of the chuck portion, one end of which is fixed to the chuck portion or formed integrally with the chuck portion, either coaxially with the chuck portion or eccentrically relative to the chuck portion, and a deburring blade portion (30) having a maximum diameter the same as or larger than the diameter of the shaft, one end of which is fixed to the shank or formed integrally with the shank, either coaxially with the shank or eccentrically relative to the shank.

Description

[Technical Field]

[0001] The present invention relates to a deburring tool, a deburring device, a grinding tool, and a grinding device, and is suitable for use in removing burrs formed at the ends of through-holes or grooves of workpieces having through-holes or grooves that are visible from the outside, or for removing burrs, foreign matter, or coating films formed on the surface of the workpiece. [Background technology]

[0002] When through holes or at least partially through grooves are formed in steel workpieces using machine tools, burrs are formed at the ends of the through holes or grooves.

[0003] Conventionally, deburring devices for removing such burrs have been proposed (see, for example, Patent Documents 1 to 3).

[0004] In the deburring device described in Patent Document 1, a deburring tool consisting of a rod-shaped grinding stone and a holder are attached to the main body, and a weight that is biased in one direction is fixed to the holder.The main body is attached to a drill press and rotated, generating centrifugal force in the weight, causing the deburring tool to rotate at an angle relative to the main body, thereby removing the burrs.

[0005] In the deburring device described in Patent Document 2, a main shaft connected to a drive motor via a universal joint is formed on a base that can move back and forth relative to the workpiece, and a deburring tool is attached to the tip of this main shaft to enable rotational movement. Multiple pressing means are provided around the outer periphery of this main shaft at regular intervals, capable of pressing the main shaft in a direction that intersects with the axis. These pressing means allow the deburring tool to tilt relative to the axis of the drive motor, with the universal joint as the base point. The circumferential pressing means sequentially press the main shaft, enabling the deburring tool to rotate around the axis of the drive motor in an inclined state.

[0006] The deburring device described in Patent Document 3 comprises a main shaft to which a driven collar member having a cam surface is fixed at the rear end of the shaft, a tool support housing that supports the main shaft so that it can be tilted while elastically supporting it in a non-tilted state via a cam device and that is movable along a slide base, a slide block that supports the rotating shaft, has a drive source for it, and is elastically connected to the housing and movable along the slide base, a cam follower that is provided on the rotating shaft and can engage with the cam surface provided on the driven collar member, and a means for moving the housing and slide block. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Publication No. 6-11709 [Patent Document 2] Patent No. 3078595 [Patent Document 3] Japanese Patent Application Publication No. 8-85020 Summary of the Invention [Problem to be solved by the invention]

[0008] However, according to the inventor's investigations, it was difficult for the above-mentioned conventional deburring devices to remove burrs formed at the ends of through holes with a diameter of about 2 to 3 mm or grooves with a width of about 2 to 3 mm.

[0009] Therefore, the problem that this invention aims to solve is to provide a deburring tool that can easily remove burrs formed at the ends of through holes with a diameter of about 2 to 3 mm or grooves with a width of about 2 to 3 mm, and a deburring device that uses this deburring tool.

[0010] Another object of the present invention is to provide a grinding tool that can easily remove burrs, foreign matter, or coating films formed on the surface of various workpieces, and a grinding device that uses this grinding tool. [Means for solving the problem]

[0011] In order to solve the above problems, the present invention provides: A deburring tool for removing burrs formed at an end of a through hole and / or a groove that is at least partially through a workpiece having a through hole and / or a groove that is at least partially through visible from the outside, the deburring tool comprising: A cylindrical chuck portion, a shaft portion having a diameter smaller than that of the chuck portion, one end of which is fixed to the chuck portion or formed integrally with the chuck portion, coaxially with the chuck portion or eccentrically with respect to the chuck portion; a deburring blade having a maximum diameter equal to or larger than the diameter of the shank, the deburring blade having one end fixed to the shank or integrally provided with the shank, the deburring blade being coaxial with the shank or eccentric with respect to the shank; The deburring tool has the following features.

[0012] In this deburring tool, the chuck part is held by the spindle chuck, and when the spindle chuck is rotated, the cutting part can be made to oscillate (precession) with the middle part of the shank as the fulcrum. The diameter of the oscillating motion of the cutting part can be controlled by the rotation speed of the spindle chuck.

[0013] Typically, the chuck portion has a hole (through hole or blind hole) through which the shank passes, and the shank is fixed to the chuck portion by hammering one end of the shank into this hole, hot or cold fitting, adhesive bonding, or a combination of these. In one example, the chuck portion has a hole through which the shank passes, and a female-threaded screw hole is formed on the outer periphery of the chuck portion so that it reaches this hole, and the shank is fixed to the chuck portion by screwing a male screw into this screw hole and pressing the tip of the male screw against the shank. The chuck portion and shank may be formed as a single unit by machining (machining) a bar stock. The shank and cutting portion may also be formed as a single unit by machining (machining) a bar stock. The chuck portion, shank portion, and blade portion may be coaxial with one another, or the shank portion may be coaxial (concentric) with the chuck portion and the blade portion may be eccentric relative to the shank portion, or the shank portion may be eccentric relative to the chuck portion and the blade portion may be coaxial with the shank portion, or the shank portion may be eccentric relative to the chuck portion and the blade portion may be coaxial with the chuck portion.

[0014] The cutting edge is configured to remove burrs formed at the ends of through-holes and / or at least partially penetrating grooves in a workpiece. The cutting edge generally has a circular, convex polygonal, or concave polygonal cross-sectional shape. Convex polygons include triangles, squares, pentagons, hexagons, etc., while concave polygons include triangles, squares, pentagons, hexagons, etc. When the cutting edge has a circular cross-sectional shape, the outer periphery of the cutting edge has one or more angular protrusions extending in the longitudinal direction of the cutting edge. The cutting edge may be tapered, either decreasing or increasing in diameter toward the tip. If necessary, abrasive grains are electroplated or fused to at least a portion of the surface of the cutting edge. The abrasive grains are not particularly limited and may be selected as needed, but examples include diamond abrasive grains and boron nitride (BN) abrasive grains (e.g., QBN abrasive grains). The cutting edge may have a shape similar to that of the tip of a drill or reamer, and grooves may be formed in the tip of the drill or reamer in the axial direction of the drill or reamer or in a direction intersecting the axial direction (for example, a direction perpendicular to the axial direction) as needed. The depth and width of the grooves may be selected as needed.

[0015] The materials of the chuck, shaft and blade are selected depending on the material of the workpiece, and may be, for example, carbon steel for mechanical structures, steel wire, spring steel, high-speed steel, ultra-high-speed steel, etc. Hard It is made of alloys, ceramics, etc. For example, Hard By using an alloy or ceramic material, the blade can maintain its deburring performance even when heated to a high temperature.

[0016] The dimensions of each part of the deburring tool are selected depending on the diameter of the through hole and the width of the groove in the workpiece, but for example, the length of the shank is 10 mm to 100 mm, the diameter is 0.4 mm to 3 mm, the length of the blade is 2 mm to 10 mm, and the maximum diameter is 0.8 mm to 5 mm. Furthermore, if the blade is eccentric with respect to the shank, the eccentricity of the blade relative to the shank is 0.1 mm to 1.5 mm. Furthermore, if the shank is eccentric with respect to the chuck, the eccentricity of the shank relative to the chuck is, for example, 0.1 mm to 2 mm.

[0017] The material of the workpiece may be essentially any material, as long as burrs are generated at the ends of the through-holes or at least partially through-grooves formed in the workpiece. Examples of such materials include, but are not limited to, steel (including various stainless steels), non-ferrous metals, plastics (especially hard plastics), and wood. Non-ferrous metals include, but are not limited to, aluminum alloys, titanium, titanium alloys, copper, and copper alloys. The type of workpiece is also not limited to, as long as it has through-holes and / or at least partially through-grooves. Examples include pistons for internal combustion engines, bearings for internal combustion engines, and perforated boards. Internal combustion engine pistons have through-holes (oil holes) and ring grooves for oil passage. The diameter of these through-holes and the width of the grooves are, for example, 1 mm or more and 5 mm or less. Internal combustion engine bearings have holes penetrating the inner and outer surfaces or oil grooves on the inner circumferential surface to supply lubricating oil for lubrication of the bearing. Examples of perforated boards include steel punched metal and wooden perforated boards. When drilling holes in plastic workpieces, heat generated during drilling can cause burrs to form linear strings, which, combined with the inherent properties of plastic, can result in soft burrs that remain in the holes. However, with this deburring tool, the oscillating motion of the blade catches the linear burrs, and centrifugal force creates a self-cleaning effect, allowing the blade to grind away the burrs from the corners of the through-hole. When drilling holes in wood workpieces, large burrs are generated by wood peeling along the grain or fiber during drilling. Unlike metals and plastics, peeling occurs around the burrs. However, with this deburring tool, the burrs are ground away from the base material and the self-cleaning effect of centrifugal force allows for efficient deburring.

[0018] The present invention also provides: A deburring device for removing burrs formed at an end of a through hole and / or a groove that is at least partially through a workpiece having a through hole and / or a groove that is at least partially through visible from the outside, the device comprising: The above-mentioned deburring tool is A cylindrical chuck portion, a shaft portion having a diameter smaller than that of the chuck portion, one end of which is fixed to the chuck portion or formed integrally with the chuck portion, coaxially with the chuck portion or eccentrically with respect to the chuck portion; a deburring blade having a maximum diameter equal to or larger than the diameter of the shank, the deburring blade having one end fixed to the shank or integrally provided with the shank, the deburring blade being coaxial with the shank or eccentric with respect to the shank; The deburring device has the following features.

[0019] The drive system of the deburring device can be appropriately selected from drive systems of conventionally known deburring devices. In the present invention of the deburring device, the same as described in relation to the above invention of the deburring cutting tool applies except for the above.

[0020] The present invention also provides: A grinding tool for removing burrs, foreign matter, or coating films formed on the surface of a workpiece, A cylindrical chuck portion, a shaft portion having a diameter smaller than that of the chuck portion, one end of which is fixed to the chuck portion or formed integrally with the chuck portion, coaxially with the chuck portion or eccentrically with respect to the chuck portion; a grinding blade having a maximum diameter equal to or larger than the diameter of the shank, the grinding blade having one end fixed to the shank or integrally provided with the shank, the grinding blade being coaxial with the shank or eccentric with respect to the shank; It is a grinding tool having the following.

[0021] In this grinding tool invention, the above description of the deburring tool invention is valid, provided that the deburring tool and the deburring blade are respectively read as grinding blades and grinding blades. The burrs, foreign matter, or coating film formed on the surface of a workpiece can be of any type and are not particularly limited. Specifically, examples of burrs include burrs that occur along the mold mating surface when molten resin overflows from the parting line during resin molding of the workpiece, and burrs that occur on the edge of a workpiece when a ductile metal is press-molded (such as punched burrs resulting from cutting, or burrs or overflows during rolling). Examples of foreign matter include foreign matter that occurs during or after the manufacture of a workpiece due to adhesion to the surface or local chemical reactions. Examples of coating films include unwanted coating films that appear in the pores or peripheries of a workpiece after spray painting or dipping (immersion) painting, and unwanted plating films such as whiskers that appear in the pores or peripheries of a workpiece after plating.

[0022] The present invention also provides: A grinding device for removing burrs, foreign matter, or coating film formed on the surface of a workpiece by attaching a grinding tool to a spindle chuck, The grinding tool is A cylindrical chuck portion, a shaft portion having a diameter smaller than that of the chuck portion, one end of which is fixed to the chuck portion or formed integrally with the chuck portion, coaxially with the chuck portion or eccentrically with respect to the chuck portion; a grinding blade having a maximum diameter equal to or larger than the diameter of the shank, the grinding blade having one end fixed to the shank or integrally provided with the shank, the grinding blade being coaxial with the shank or eccentric with respect to the shank; The grinding device has:

[0023] In this grinding device invention, what has been explained in relation to the above-mentioned deburring cutting tool invention and deburring device invention also applies. [Effects of the Invention]

[0024] According to this invention, the chuck portion of the deburring tool is chucked to the spindle chuck of the deburring device, and for example, the cutting edge of the deburring tool is inserted near the end of a through-hole or at least a partially penetrating groove in a workpiece, and the spindle chuck is rotated to rotate the deburring tool, so that the cutting edge comes into contact with the end of the through-hole or at least a partially penetrating groove, thereby removing the burr. By selecting the diameter of the cutting edge and shank and the rotation speed of the spindle chuck according to the diameter of the through-hole or the width of the groove, it is possible to easily remove burrs formed at the end of a through-hole with a diameter of about 2 to 3 mm or a groove with a width of about 2 to 3 mm. In addition, the chuck portion of the grinding tool is chucked to the spindle chuck of the grinding device, and, for example, the cutting edge of the grinding tool is moved near the burr, foreign matter, or coating film to be removed by grinding the surface of the workpiece, and the grinding tool is rotated by rotating the spindle chuck, so that the cutting edge comes into contact with the burr, foreign matter, or coating film, thereby easily removing the burr, foreign matter, or coating film. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a front view showing a deburring tool according to a first embodiment of the present invention. [Figure 2] 1 is a cross-sectional view showing a first configuration example of a cutting portion of a deburring tool according to a first embodiment of the present invention. [Figure 3] 3 is a cross-sectional view showing a second configuration example of the cutting portion of the deburring tool according to the first embodiment of the present invention. FIG. [Figure 4] FIG. 3 is a cross-sectional view showing a third configuration example of the cutting portion of the deburring tool according to the first embodiment of the present invention. [Figure 5] FIG. 4 is a cross-sectional view showing a fourth configuration example of the cutting portion of the deburring tool according to the first embodiment of the present invention. [Figure 6] FIG. 10 is a front view showing a deburring tool according to a second embodiment of the present invention. [Figure 7] FIG. 10 is a front view showing a deburring tool according to a third embodiment of the present invention. [Figure 8] FIG. 10 is a cross-sectional view showing a fifth configuration example of a cutting portion of a deburring tool according to a third embodiment of the present invention. [Figure 9] FIG. 10 is a cross-sectional view showing a sixth configuration example of a cutting portion of a deburring tool according to a third embodiment of the present invention. [Figure 10] FIG. 10 is a cross-sectional view showing a seventh configuration example of a cutting portion of a deburring tool according to a third embodiment of the present invention. [Figure 11] FIG. 10 is a cross-sectional view showing an eighth configuration example of a cutting portion of a deburring tool according to a third embodiment of the present invention. [Figure 12] FIG. 10 is a front view showing a deburring tool according to a fourth embodiment of the present invention. [Figure 13] FIG. 10 is a front view showing a deburring tool according to a fifth embodiment of the present invention. [Figure 14] FIG. 10 is a front view showing a deburring tool according to a sixth embodiment of the present invention. [Figure 15] FIG. 13 is a front view showing a deburring tool according to a seventh embodiment of the present invention. [Figure 16] FIG. 13 is a cross-sectional view showing a cutting edge of a deburring tool according to a seventh embodiment of the present invention. [Figure 17] FIG. 13 is a front view showing a deburring tool according to an eighth embodiment of the present invention. [Figure 18] FIG. 13 is a right side view showing the cutting portion of a deburring tool according to an eighth embodiment of the present invention. [Figure 19] FIG. 13 is a front view showing a deburring tool according to a ninth embodiment of the present invention. [Figure 20] FIG. 13 is a right side view showing the cutting portion of the deburring tool according to the ninth embodiment of the present invention. [Figure 21] FIG. 23 is a front view showing a deburring tool according to a tenth embodiment of the present invention. [Figure 22] FIG. 23 is a right side view showing the cutting portion of the deburring tool according to the tenth embodiment of the present invention. [Figure 23]10 is a schematic diagram showing a state in which a deburring tool according to any one of the first to tenth embodiments of the present invention is chucked on a spindle chuck of a deburring device, and a workpiece is placed on a stage. FIG. [Figure 24] 24 is a schematic diagram showing how a burr is removed from the end of a through-hole in a workpiece using a deburring tool from the state shown in FIG. 23. FIG. [Figure 25] 25 is a schematic diagram showing a state in which burrs at the end of a groove in a workpiece are removed by the deburring tool after burrs at the end of a through-hole in the workpiece are removed by the deburring tool as shown in FIG. 24. [Figure 26] FIG. 1 is a front view showing a steel piston used as a workpiece in the examples. [Figure 27] 27 is an enlarged vertical cross-sectional view of the outer periphery of the piston taken along line AA in FIG. 26. [Figure 28] 1 is a photograph, substituted for a drawing, showing a through hole of an oil hole of a workpiece before the burr at the end of the oil hole is removed using a deburring tool in an embodiment. [Figure 29] 10 is a photograph in place of a drawing showing a through hole after the burr at the end of the oil hole of the workpiece has been removed using a deburring tool in the embodiment. [Figure 30] 10 is a photograph, substituted for a drawing, showing a through hole before the burr at the end of the ring groove of the workpiece is removed with a deburring tool in the embodiment. [Figure 31] 10 is a photograph, substituted for a drawing, showing the through hole after the burr at the end of the ring groove of the workpiece has been removed using a deburring tool in the embodiment. [Figure 32] 11A and 11B are a side view and a plan view for explaining a method for removing burrs and gate residues formed on the surface of a resin molding or the like by a grinding device according to an eleventh embodiment of the present invention. [Figure 33] 11A and 11B are a side view and a plan view for explaining a method for removing burrs and gate residues formed on the surface of a resin molding or the like by a grinding device according to an eleventh embodiment of the present invention. [Figure 34]11A and 11B are a side view and a plan view for explaining a method for removing burrs and gate residues formed on the surface of a resin molding or the like by a grinding device according to an eleventh embodiment of the present invention. [Figure 35] 11A and 11B are plan and cross-sectional views for explaining a method for removing an unwanted coating film formed on the surface of a painted product, etc., by a grinding device according to an eleventh embodiment of the present invention. [Figure 36] FIG. 23 is a cross-sectional view illustrating a method for removing an unwanted coating film formed on the surface of a coated product or the like by a grinding device according to an eleventh embodiment of the present invention. [Figure 37] 11A and 11B are plan and cross-sectional views for explaining a method for removing an unwanted coating film formed on the surface of a painted product, etc., by a grinding device according to an eleventh embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] Hereinafter, modes for carrying out the invention (hereinafter referred to as "embodiments") will be described.

[0027] First Embodiment [Deburring tool] FIG. 1 shows a deburring tool according to a first embodiment. As shown in FIG. 1, this deburring tool comprises a cylindrical chuck portion 10, a thin cylindrical shank portion 20, and a blade portion 30, all of which are arranged coaxially. The diameter of the shank portion 20 is smaller than the diameters of the chuck portion 10 and the blade portion 30. A through-hole 11 is formed along the central axis of the chuck portion 10, and one end of the shank portion 20 is inserted through this through-hole 11 to secure the shank portion 20 to the chuck portion 10. The shank portion 20 is secured to the chuck portion 10 by driving one end of the shank portion 20 into the through-hole 31, hot or cold fitting, adhesive bonding, or a combination thereof. A through-hole 31 is formed along the central axis of the blade portion 30, and the other end of the shank portion 20 is inserted through this through-hole 31. The blade portion 30 is secured to the shank portion 20 by driving the other end of the shank portion 20 into the through-hole 31, hot or cold fitting, adhesive bonding, or a combination thereof.

[0028] Specific configuration examples 1 to 4 of the blade portion 30 are shown in Figures 2 to 5, respectively. The blade portion 30 of configuration example 1 shown in Figure 2 has a cylindrical shape, and diamond abrasive grains are electrodeposited on at least a portion of the surface. The blade portion 30 of configuration example 2 shown in Figure 3 has a regular triangular prism shape. The blade portion 30 of configuration example 3 shown in Figure 4 has a regular square prism shape. The blade portion 30 of configuration example 4 shown in Figure 5 has a concave hexagonal prism shape. Diamond abrasive grains are electrodeposited on a portion of the surface of the blade portion 30 of configuration examples 2 to 4, particularly the surface of the protrusions, or the entire surface, as necessary.

[0029] The materials for the chuck portion 10, shank portion 20, and blade portion 30 are selected as needed, and may be, for example, carbon steel for mechanical structures, steel wire, spring steel, high-speed steel, etc. To give a specific example, the chuck portion 10 is carbon steel for mechanical structures (S45C), the shank portion 20 is spring steel, and the blade portion 30 is high-speed steel.

[0030] The dimensions of the chuck portion 10, shank 20, and blade portion 30 are selected as needed, but are, for example, as follows: chuck portion 10 has a length of 15 mm to 25 mm and a diameter of 8 mm to 15 mm, shank 20 has a length of 40 mm to 80 mm and a diameter of 0.7 mm to 1.3 mm, and blade portion 30 has a length of 2 mm to 5 mm and a diameter of 2 mm to 4 mm. To give a specific example, chuck portion 10 has a length of 20 mm and a diameter of 10 mm, shank 30 has a length of 60 mm and a diameter of 1 mm, and blade portion 30 has a length of 3 mm and a diameter of 2 mm.

[0031] When the chuck portion of this deburring tool is chucked by the spindle chuck of a deburring device and the spindle chuck is rotated, centrifugal force acting on the cutting portion 30 causes the cutting portion 30 to perform an oscillating motion (precession) with the midpoint of the shank 20 as a fulcrum, as shown by the dashed line in Figure 1. The diameter of the oscillating motion of the cutting portion 30 can be controlled by the rotation speed of the spindle chuck depending on the width of the through-hole or at least partially penetrating groove in the workpiece. This oscillating motion brings the cutting portion 30 of the deburring tool into contact with the burr formed at the end of the through-hole or at least partially penetrating groove in the workpiece, thereby removing the burr.

[0032] As described above, according to this first embodiment, the deburring tool is comprised of a cylindrical chuck portion 10, an elongated cylindrical shaft portion 20, and a cutting portion 30, all of which are arranged coaxially. Therefore, by chucking and rotating the chuck portion 10 in a spindle chuck of a deburring device, the cutting portion 30 can be caused to oscillate. This allows the cutting portion 30 to contact a burr formed at the end of a through-hole or at least a partially penetrating groove in a workpiece, thereby easily removing the burr. For example, even for a through-hole with a diameter of about 2 to 3 mm or a groove with a width of about 2 to 3 mm, the burr formed at the end of the hole or groove can be easily removed by selecting the dimensions of the shaft portion 20 and the cutting portion 30.

[0033] Second Embodiment [Deburring tool] Figure 6 shows a deburring tool according to the second embodiment. As shown in Figure 6, in this deburring tool, a female-threaded hole 12 is formed on the outer periphery of a chuck portion 10 so as to reach a through-hole 11, and a male screw 13 is screwed into this threaded hole 12 and the tip of the male screw 13 presses against a shank 20, thereby fixing the shank 20 to the chuck portion 10. Other aspects of this deburring tool are the same as those of the deburring tool according to the first embodiment.

[0034] According to the second embodiment, it is possible to obtain the same advantages as the first embodiment.

[0035] Third Embodiment [Deburring tool] FIG. 7 shows a deburring tool according to a third embodiment. As shown in FIG. 7, this deburring tool differs from the deburring tool according to the first embodiment in that the cutting edge 30 is eccentric with respect to the shank 20. The amount of eccentricity (the distance between the central axis of the shank 20 and the central axis of the cutting edge 30) is, for example, 0.2 mm or more and 0.5 mm or less, e.g., 0.3 mm. Cross-sectional shapes of configuration examples 5 to 8 of the cutting edge 30 corresponding to FIGS. 2 to 5 are shown in FIGS. 8 to 11, respectively. Other aspects of this deburring tool are the same as those of the deburring tool according to the first embodiment.

[0036] According to the third embodiment, it is possible to obtain the same advantages as the first embodiment.

[0037] <Fourth embodiment> [Deburring tool] Fig. 12 shows a deburring tool according to the fourth embodiment. As shown in Fig. 12, this deburring tool is similar to the third embodiment, except that, as in the second embodiment, a male screw 13 is screwed into a threaded hole 12 formed on the outer periphery of a chuck portion 10 and the tip of the male screw 13 presses against the shank 20, thereby fixing the shank 20 to the chuck portion 10.

[0038] According to the fourth embodiment, it is possible to obtain the same advantages as the first embodiment.

[0039] Fifth Embodiment [Deburring tool] Fig. 13 shows a deburring tool according to the fifth embodiment. As shown in Fig. 13, this deburring tool differs from the deburring tool according to the first embodiment in that the shank 20 is eccentric with respect to the chuck 10. The amount of eccentricity (the distance between the central axis of the chuck 10 and the central axis of the shank 20) ​​is, for example, 0.2 mm or more and 0.5 mm or less, for example, 0.3 mm. Other aspects of this deburring tool are the same as those of the deburring tool according to the first embodiment.

[0040] According to the fifth embodiment, since the shaft portion 20 is eccentric with respect to the chuck portion 10, when the chuck portion 10 of the deburring tool is chucked and rotated by a spindle chuck, the blade portion 30 is more likely to oscillate. In addition, the same advantages as those of the first embodiment can be obtained.

[0041] Sixth Embodiment [Deburring tool] Fig. 14 shows a deburring tool according to the sixth embodiment. As shown in Fig. 14, this deburring tool is similar to the fifth embodiment, except that, as in the second embodiment, a male screw 13 is screwed into a threaded hole 12 formed on the outer periphery of a chuck portion 10 and the tip of the male screw 13 presses against the shank 20, thereby fixing the shank 20 to the chuck portion 10.

[0042] According to the sixth embodiment, it is possible to obtain the same advantages as the fifth embodiment.

[0043] Seventh Embodiment [Deburring tool] Figure 15 shows a deburring tool according to the seventh embodiment. As shown in Figure 15, in this deburring tool, the cutting portion 30 has four rectangular prism-shaped protrusions 32 extending in the axial direction (longitudinal direction) of the cylinder on the outer peripheral surface of the cylinder, spaced at 90° intervals around the central axis of the cutting portion 30. Figure 16 shows the cross-sectional shape of the cutting portion 30. Other aspects of this deburring tool are similar to those of the deburring tool according to the first embodiment.

[0044] According to the seventh embodiment, it is possible to obtain the same advantages as the first embodiment.

[0045] Eighth Embodiment [Deburring tool] Figure 17 shows a deburring tool according to the eighth embodiment. As shown in Figure 17, this deburring tool differs from the deburring tool according to the first embodiment in that the cutting portion 30 is drill-shaped. The pitch of the drill-shaped cutting portion 30 can be selected as needed. Figure 18 shows a view of this cutting portion 30 from the tip side (right side view). Other aspects of this deburring tool are the same as those of the deburring tool according to the first embodiment.

[0046] According to the eighth embodiment, it is possible to obtain the same advantages as the first embodiment.

[0047] Ninth Embodiment [Deburring tool] Figure 19 shows a deburring tool according to the ninth embodiment. As shown in Figure 19, this deburring tool differs from the deburring tool according to the eighth embodiment in that a groove 33 is provided at the tip of the drill-shaped cutting portion 30 in the direction of the central axis of the cutting portion 30. Figure 20 shows a view of this cutting portion 30 from the tip side. In other respects, this deburring tool is similar to the deburring tool according to the first embodiment.

[0048] According to the ninth embodiment, it is possible to obtain the same advantages as the first embodiment.

[0049] Tenth Embodiment [Deburring tool] Figure 21 shows a deburring tool according to the tenth embodiment. As shown in Figure 21, this deburring tool differs from the deburring tool according to the first embodiment in that the cutting portion 30 is shaped like a straight groove reamer. Figure 22 shows a view of this cutting portion 30 from the tip side (right side view). In other respects, this deburring tool is similar to the deburring tool according to the first embodiment.

[0050] According to the tenth embodiment, it is possible to obtain the same advantages as the first embodiment, and in addition, it is possible to prevent unnecessary scratches and dimensional changes from occurring during deburring.

[0051] Next, we will explain a method for removing burrs formed at the ends of through holes and / or grooves that are visible from the outside and / or at least partially penetrate through grooves in a steel workpiece using the deburring tools according to the first to tenth embodiments described above.

[0052] [Deburring method using a deburring tool] As shown in Figure 23, the chuck portion 10 of the deburring tool is chucked by the spindle chuck 50 of the deburring device, and a workpiece 60 is fixed on a stage (not shown) of the deburring device. The workpiece 60 has a through-hole 61 visible from the outside and a groove 62 that penetrates at least a portion of the workpiece, and these through-hole 61 and groove 62 intersect each other at their ends. The diameter of the through-hole 61 and the width of the groove 62 are, for example, 1 mm or more and 5 mm or less. A burr 63 is formed at the end of the through-hole 61. A burr 64 is formed at the end of the groove 62.

[0053] As shown in Figure 23, first, in order to remove the burr 63 at the end of the through hole 61, the drive system of the deburring device moves the center axis of the deburring tool chucked in the spindle chuck 50 to a position slightly shifted to one side from the center axis of the through hole 61 while keeping the center axis of the deburring tool chucked in the spindle chuck 50 parallel to the center axis of the through hole 61 in the workpiece 60.

[0054] Next, as shown in FIG. 24 , the spindle chuck 50 is lowered until the tip of the cutting portion 30 of the deburring tool passes the end of the through-hole 61. At this point, the spindle chuck 50 is rotated by the drive system of the deburring device to rotate the deburring tool. The rotation direction may be clockwise or counterclockwise when viewing the cutting portion 30 from the chuck portion 10 of the deburring tool. As the deburring tool rotates, the cutting portion 30 oscillates around a midpoint of the shank 20. The diameter of the oscillating motion can be controlled by the rotation speed of the spindle chuck 50. The diameter of the oscillating motion of the cutting portion 30 is at least smaller than the diameter of the through-hole 61, typically sufficiently smaller, to prevent unnecessary damage to the inner wall of the through-hole 61. In this way, the cutting portion 30 of the deburring tool oscillates around a midpoint of the shank 20, until the cutting portion 30 comes into contact with the end of the through-hole 61. This removes the burr 63 formed at the end of the through-hole 61. After this, the rotation of the spindle chuck 50 is stopped, the rotation of the deburring tool is stopped, and the deburring tool is raised to remove the cutting portion 30 from the through-hole 61. The burr 63 that has fallen onto the groove 62 is removed later.

[0055] Next, as shown in FIG. 25 , the spindle chuck 50 is rotated 90 degrees, and the central axis of the chucked deburring tool is moved to a position slightly offset to one side from the central axis of the groove 62 while maintaining the central axis of the chucked deburring tool parallel to the central axis of the groove 62 in the workpiece 60. Next, the spindle chuck 50 is moved toward the workpiece 60 until the tip of the cutting portion 30 of the deburring tool passes the end of the groove 62. At this point, the drive system of the deburring device rotates the spindle chuck 50, thereby rotating the deburring tool. The rotation of the deburring tool causes the cutting portion 30 to oscillate around a midpoint of the shank 20. The diameter of the oscillating movement of the cutting portion 30 is at least smaller than the width of the groove 62, and typically sufficiently smaller, to prevent the cutting portion 30 from causing unnecessary damage to the inner wall of the groove 62. In this way, the cutting edge 30 of the deburring tool swings around the midpoint of the shank 20, bringing the cutting edge 30 into contact with the vicinity of the end of the groove 62. This removes the burr 64 formed at the end of the groove 62. Thereafter, the rotation of the spindle chuck 50 is stopped, which stops the rotation of the deburring tool, and the deburring tool is moved in a direction away from the workpiece 60 to remove the cutting edge 30 from the groove 62.

[0056] As a result of the above, the burrs 63 near the ends of the through-hole 61 of the workpiece 60 and the burrs 64 near the ends of the groove 62 can be easily removed.

[0057] An example will be described.

[0058] A steel piston as shown in Figure 26 was used as the workpiece 60. Figure 27 is an enlarged longitudinal cross-sectional view of the outer periphery of the piston taken along line AA in Figure 26. As shown in Figure 27, this steel piston has an oil hole 71 and a ring groove 72. The ring groove 72 extends partially through and intersects with the oil hole 71. The diameter of the oil hole 71 is 2.5 mm, and the width of the ring groove 72 is 2 mm. The steel piston material contains 0.34-0.41 wt% carbon (C), 0.15-0.8 wt% silicon (Si), 1.2-1.6 wt% manganese (Mn), up to 0.3 wt% chromium (Cr), 0.08-0.2 wt% vanadium (V), 0.02-0.06 wt% sulfur (S), 0.01-0.02 wt% nitrogen (N), up to 0.025 wt% phosphorus (P), up to 0.08 wt% molybdenum (Mo), and the remainder is iron (Fe). It has a tensile strength of 800-950 MPa, a yield strength of 520 MPa, an elongation of 12%, and a hardness HBW of 255.

[0059] The deburring tool used was the deburring tool according to the second embodiment, and the materials and dimensions of each part were as follows: The chuck portion 10 was made of S45C, the shank 20 was made of spring steel, and the cutting portion 30 was made of high-speed steel. The chuck portion 10 was 20 mm long and 8 mm in diameter, the shank 20 was 60 mm long and 1.6 mm in diameter, and the cutting portion 30 was 3 mm long and 2 mm in diameter. The rotation speed of the spindle chuck 50 was 11,000 rpm.

[0060] The burrs at the ends of the oil hole 71 and the ring groove 72 were removed using the method shown in Figures 23 to 25. Figure 28 is a photograph showing the oil hole 71 before deburring. Figure 29 is a photograph showing the oil hole 71 after the burrs at the end of the oil hole 71 have been removed as shown in Figure 24. From Figure 24, it can be seen that the burrs at the end of the oil hole 71 have been removed. Figure 30 is a photograph showing the ring groove 72 before deburring. Figure 31 is a photograph showing the ring groove 72 after the burrs at the end of the ring groove 72 have been removed as shown in Figure 25. From Figure 31, it can be seen that the burrs at the end of the ring groove 72 have been removed.

[0061] Eleventh Embodiment [Grinding equipment] In the grinding device according to the 11th embodiment, a grinding tool having a configuration similar to that of the deburring tools according to the first to tenth embodiments described above is used, and the chuck portion 10 of this grinding tool is chucked by a spindle chuck 50, as in the deburring device shown in Figure 23.

[0062] [Method for removing burrs, foreign matter, or coating film using a grinding tool]

[0063] The workpiece is fixed on the stage (not shown) of the grinding device. The surface of the workpiece has burrs, foreign matter, or coating film to be removed.

[0064] First, the drive system of the grinding device moves the center axis of the grinding tool chucked in the spindle chuck 50 to a position directly above the object to be removed from the workpiece or slightly offset from the object to be removed, while keeping the center axis of the grinding tool approximately perpendicular to the surface of the workpiece.

[0065] Next, the drive system of the grinding device rotates the spindle chuck 50, rotating the grinding tool while lowering the spindle chuck 50, bringing the tip of the cutting edge 30 of the grinding tool closer to the object to be removed from a position directly above or slightly offset from the object. This causes the cutting edge 30 of the grinding tool to oscillate and come into contact with the top or side of the object to be removed, scraping it off. The cutting edge 30 is then moved along the object to be removed until all of it is scraped off. Then, the rotation of the spindle chuck 50 is stopped, stopping the rotation of the grinding tool, and the grinding tool is raised.

[0066] As a result, the object to be removed formed on the surface of the workpiece can be easily removed.

[0067] Next, specific examples of the workpiece and the object to be removed will be described, along with a method for removing the object to be removed.

[0068] (Example 1) 32A and 32B show a resin molded product 80, with Fig. 32A being a side view and Fig. 32B being a plan view. As shown in Fig. 32A and B, burrs 81 are formed on the surface of the resin molded product 80 at the mold mating surfaces during melt molding of the resin, and gate residues 82 are also formed. Furthermore, a through-hole 83 is provided at one end of the resin molded product 80, and burrs 84 are formed on the inner surface of the through-hole 83.

[0069] As shown in Figures 33A and 33B, the cutting edge 30 of the grinding tool is brought into contact with one end of the burr 81 while performing an oscillating motion, and the cutting edge 30 is then moved along the burr 81 toward the other end to remove the burr 81. Here, Figure 33A is a side view, and Figure 33B is a plan view. Similarly, the cutting edge 30 of the grinding tool is brought into contact with the burr 84 while performing an oscillating motion, and the burr 84 is removed. Similarly, the gate residue 82 is also removed by bringing the cutting edge 30 of the grinding tool into contact with the gate residue 82 while performing an oscillating motion.

[0070] As a result, as shown in Figures 34A and 34B, it is possible to easily remove burrs 81 and gate residues 82 formed on the surface of resin molded product 80, as well as burrs 84 formed on the inner surface of through-hole 83. Here, Figure 34A is a side view, and Figure 34B is a plan view.

[0071] (Example 2) Figures 35A and B show a plate-shaped coated product 100. Here, Figure 35A is a plan view, and Figure 35B is a cross-sectional view taken along line BB in Figure 35A. As shown in Figures 35A and B, coated product 100 not only has coating film 101 formed on the original coated area, but also has unwanted coating film 102 formed on the edge of coated product 100 and unwanted coating film 104 formed on the inner edge of hole 103.

[0072] 36, the cutting edge 30 of the grinding tool is oscillated while the cutting edge 30 is brought into contact with any position on the coating film 102 on the edge of the coated product 100, and the coating film 102 is scraped away by moving the cutting edge 30 along the coating film 102. Similarly, the coating film 104 on the inner edge of the hole 103 is scraped away by bringing the cutting edge 30 into contact with the coating film 104 while the cutting edge 30 of the grinding tool is oscillated.

[0073] As a result of the above, it is possible to easily remove unnecessary coating films 102, 104 formed on the surface of coated article 100, as shown in Figures 37A and 37B. Here, Figure 37A is a plan view, and Figure 37B is a cross-sectional view taken along line BB in Figure 37A.

[0074] As described above, according to the eleventh embodiment, burrs, foreign matter or coating film formed on the surface of the workpiece can be easily removed.

[0075] Although the embodiments and examples of the present invention have been specifically described above, the present invention is not limited to the above-described embodiments and examples, and various modifications based on the technical concept of the present invention are possible.

[0076] For example, the numerical values, configurations, shapes, materials, methods, etc. given in the above-described embodiments and examples are merely examples, and different numerical values, configurations, shapes, materials, methods, etc. may be used as needed. [Explanation of symbols]

[0077] 10... chuck portion, 20... shaft portion, 30... cutting portion, 50... spindle chuck, 60... workpiece, 61... through hole, 62... groove, 80... resin molded product, 100... painted product

Claims

1. A deburring tool for removing burrs formed at an end of a through hole and / or a groove that is at least partially through a workpiece having a through hole and / or a groove that is at least partially through visible from the outside, the deburring tool comprising: A cylindrical chuck portion, a shaft portion made of steel wire, spring steel, or high-speed steel, the shaft portion having one end fixed to the chuck portion or being formed integrally with the chuck portion, the diameter of the shaft portion being smaller than the diameter of the chuck portion, being 0.4 mm or more and 3 mm or less, and the length of the shaft portion being 10 mm or more and 100 mm or less, and being coaxial with the chuck portion or eccentric with respect to the chuck portion; a deburring blade portion made of high-speed steel, cemented carbide, or ceramics, the blade portion having one end fixed to the shank or integrally formed with the shank, the maximum diameter being greater than the diameter of the shank and being 0.8 mm to 5 mm and the length being 2 mm to 10 mm, the maximum diameter being greater than the diameter of the shank; and The cutting edge has a circular cross-sectional shape, and has an angular protrusion extending in the longitudinal direction of the cutting edge on the outer peripheral surface of the cutting edge, or abrasive grains are electrodeposited on at least a portion of the surface of the cutting edge; or, the cutting portion has a cross-sectional shape of a convex polygon or a concave polygon, or in addition to having a cross-sectional shape of a convex polygon or a concave polygon, abrasive grains are electrodeposited on at least a part of the surface of the cutting portion; or, The cutting edge has a shape similar to that of the tip of a drill or reamer, or has a shape similar to that of the tip of a drill or reamer and, in addition, grooves are formed in the tip of the drill or reamer in the axial direction of the drill or reamer or in a direction intersecting the axial direction, The deburring tool is configured so that when the chuck portion is chucked and rotated by a spindle chuck, centrifugal force acting on the blade portion causes the blade portion to perform a swinging motion with the midpoint of the shaft portion as a fulcrum.

2. 2. The deburring tool according to claim 1, wherein the chuck portion has a hole through which the shank passes, and the shank is fixed to the chuck portion by hammering the shank into the hole, by hot or cold fitting, by adhesive, or by a combination of these.

3. 2. A deburring tool according to claim 1, wherein the chuck portion has a hole through which the shank passes, a female-threaded screw hole is formed on the outer periphery of the chuck portion so as to reach the hole, and the shank is fixed to the chuck portion by screwing a male screw into the screw hole and pressing the tip of the male screw against the shank.

4. 2. The deburring tool according to claim 1, wherein the shaft portion is coaxial with the chuck portion, the cutting portion is eccentric with respect to the shaft portion, and the amount of eccentricity of the cutting portion with respect to the shaft portion is 0.1 mm or more and 1.5 mm or less.

5. 2. The deburring tool according to claim 1, wherein the shaft portion is eccentric with respect to the chuck portion, the cutting portion is coaxial with the shaft portion, and the amount of eccentricity of the shaft portion with respect to the chuck portion is 0.1 mm or more and 2 mm or less.

6. The deburring tool according to any one of claims 1 to 5, wherein the diameter of the through hole and the width of the groove are 1 mm or more and 5 mm or less.

7. 7. The deburring tool according to claim 6, wherein the through hole and the groove intersect with each other.

8. A deburring device for removing burrs formed at an end of a through hole and / or a groove that is at least partially through a workpiece having a through hole and / or a groove that is at least partially through visible from the outside, the deburring device comprising: The above-mentioned deburring tool is A cylindrical chuck portion, a shaft portion made of steel wire, spring steel, or high-speed steel, the shaft portion having one end fixed to the chuck portion or being formed integrally with the chuck portion, the diameter of the shaft portion being smaller than the diameter of the chuck portion, being 0.4 mm or more and 3 mm or less, and the length of the shaft portion being 10 mm or more and 100 mm or less, and being coaxial with the chuck portion or eccentric with respect to the chuck portion; a deburring blade portion made of high-speed steel, cemented carbide, or ceramics, the blade portion having one end fixed to the shank or integrally formed with the shank, the maximum diameter being greater than the diameter of the shank and being 0.8 mm to 5 mm and the length being 2 mm to 10 mm, the maximum diameter being greater than the diameter of the shank; and The cutting edge has a circular cross-sectional shape, and has an angular protrusion extending in the longitudinal direction of the cutting edge on the outer peripheral surface of the cutting edge, or abrasive grains are electrodeposited on at least a portion of the surface of the cutting edge; or, the cutting portion has a cross-sectional shape of a convex polygon or a concave polygon, or in addition to having a cross-sectional shape of a convex polygon or a concave polygon, abrasive grains are electrodeposited on at least a part of the surface of the cutting portion; or, The cutting edge has a shape similar to that of the tip of a drill or reamer, or has a shape similar to that of the tip of a drill or reamer and, in addition, grooves are formed in the tip of the drill or reamer in the axial direction of the drill or reamer or in a direction intersecting the axial direction, This deburring device is configured so that when the chuck portion is chucked and rotated by a spindle chuck, centrifugal force acting on the blade portion causes the blade portion to perform a swinging motion with the midpoint of the shaft portion as a fulcrum.

9. A grinding tool for removing burrs, foreign matter, or coating films formed on the surface of a workpiece, A cylindrical chuck portion, a shaft portion made of steel wire, spring steel, or high-speed steel, the shaft portion having one end fixed to the chuck portion or being formed integrally with the chuck portion, the diameter of the shaft portion being smaller than the diameter of the chuck portion, being 0.4 mm or more and 3 mm or less, and the length of the shaft portion being 10 mm or more and 100 mm or less, and being coaxial with the chuck portion or eccentric with respect to the chuck portion; a grinding blade portion made of high-speed steel, cemented carbide, or ceramics, the blade portion having one end fixed to the shank or integrally formed with the shank, the maximum diameter being 0.8 mm to 5 mm and the length being 2 mm to 10 mm, the maximum diameter being larger than the diameter of the shank; and the blade portion being coaxial with the shank or eccentric with respect to the shank, the one end of the blade portion being fixed to the shank or integrally formed with the shank. and The cutting edge has a circular cross-sectional shape, and has an angular protrusion extending in the longitudinal direction of the cutting edge on the outer peripheral surface of the cutting edge, or abrasive grains are electrodeposited on at least a portion of the surface of the cutting edge; or, the cutting portion has a cross-sectional shape of a convex polygon or a concave polygon, or in addition to having a cross-sectional shape of a convex polygon or a concave polygon, abrasive grains are electrodeposited on at least a part of the surface of the cutting portion; or, The cutting edge has a shape similar to that of the tip of a drill or reamer, or has a shape similar to that of the tip of a drill or reamer and, in addition, grooves are formed in the tip of the drill or reamer in the axial direction of the drill or reamer or in a direction intersecting the axial direction, The grinding tool is configured so that when the chuck portion is chucked and rotated by a spindle chuck, centrifugal force acting on the cutting portion causes the cutting portion to perform a swinging motion with the midpoint of the shank as a fulcrum.

10. A grinding device for removing burrs, foreign matter, or coating film formed on the surface of a workpiece, the grinding device having a grinding tool attached to a spindle chuck, The grinding tool is A cylindrical chuck portion, a shaft portion made of steel wire, spring steel, or high-speed steel, the shaft portion having one end fixed to the chuck portion or being formed integrally with the chuck portion, the diameter of the shaft portion being smaller than the diameter of the chuck portion, being 0.4 mm or more and 3 mm or less, and the length of the shaft portion being 10 mm or more and 100 mm or less, and being coaxial with the chuck portion or eccentric with respect to the chuck portion; a grinding blade portion made of high-speed steel, cemented carbide, or ceramics, the blade portion having one end fixed to the shank or integrally formed with the shank, the maximum diameter being 0.8 mm to 5 mm and the length being 2 mm to 10 mm, the maximum diameter being larger than the diameter of the shank; and the blade portion being coaxial with the shank or eccentric with respect to the shank, the one end of the blade portion being fixed to the shank or integrally formed with the shank. and The cutting edge has a circular cross-sectional shape, and has an angular protrusion extending in the longitudinal direction of the cutting edge on the outer peripheral surface of the cutting edge, or abrasive grains are electrodeposited on at least a portion of the surface of the cutting edge; or, the cutting portion has a cross-sectional shape of a convex polygon or a concave polygon, or in addition to having a cross-sectional shape of a convex polygon or a concave polygon, abrasive grains are electrodeposited on at least a part of the surface of the cutting portion; or, The cutting edge has a shape similar to that of the tip of a drill or reamer, or has a shape similar to that of the tip of a drill or reamer and, in addition, grooves are formed in the tip of the drill or reamer in the axial direction of the drill or reamer or in a direction intersecting the axial direction, The grinding device is configured so that when the chuck portion is chucked and rotated by a spindle chuck, centrifugal force acting on the cutting portion causes the cutting portion to perform a swinging motion with the midpoint of the shaft portion as a fulcrum.

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