Deburring tool, deburring device, grinding tool, and grinding device

Abstract

For example, the present invention provides a deburring tool that can easily remove burrs formed at the ends of through holes with a diameter of approximately 2-3 mm or grooves with a width of approximately 2-3 mm, and a deburring device using this deburring tool. [Solution] A deburring tool for removing burrs formed at the ends of through holes and / or grooves that are at least partially through in a workpiece having through holes and / or grooves that are at least partially through visible from the outside comprises a cylindrical chuck portion (10), a shaft portion (20) having a diameter smaller than the diameter of the chuck portion, with one end fixed to the chuck portion or provided integrally with the chuck portion, coaxially with or eccentrically with respect to the chuck portion, and a deburring blade portion (30) having a maximum diameter equal to or greater than the diameter of the shaft portion, with one end fixed to the shaft portion or provided integrally with the shaft portion, coaxially with or eccentrically with respect to the shaft portion.

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 removing burrs formed at the ends of through-holes and grooves of a workpiece having a through-hole visible from the outside or a groove at least partially penetrating, or removing burrs, foreign matters, or coating films formed on the surface of the workpiece.

Background Art

[0002] When a through-hole is formed in a steel workpiece by a machine tool or a groove at least partially penetrating is formed, burrs occur at the ends of these through-holes and 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 and a holder made of a rod-shaped grindstone are attached to the main body, and a weight with a unidirectional eccentric load is further fixed to the holder. The main body is attached to a lathe and rotated to generate centrifugal force in the weight, and the deburring tool rotates in a tilted state with respect to the main body to scrape off the burrs.

[0005] In the deburring device described in Patent Document 2, a spindle connected via a drive motor and a universal joint is formed on a base that can move forward and backward with respect to the workpiece. A deburring tool is connected to the tip of this spindle so as to be rotatable, and a plurality of pressing means capable of pressing in a direction intersecting the axis of the spindle are provided at regular intervals in the circumferential direction on the outer periphery of this spindle. By these pressing means, with the universal joint as a base point, the deburring tool can be tilted with respect to the axis of the drive motor, and by sequentially pressing the spindle with the pressing means in the circumferential direction, the deburring tool can be rotated and moved around the axis of the drive motor in a tilted state.

[0006] The deburring device described in Patent Document 3 comprises a main shaft to which a driven collar member having a cam surface at the rear end of the shaft is fixed; a tool support housing that supports the main shaft so as to be tiltable, while elastically supporting it in a non-tilted state via a cam device and moving along a slide base; a slide block that supports a rotating shaft, has a drive source thereof, is elastically connected to the housing and moves along the slide base; a cam follower provided on the rotating shaft and capable of engaging with the cam surface provided on the driven collar member; and means for moving the housing and the 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 [Overview of the project] [Problems that the invention aims to solve]

[0008] However, according to the inventor's research, the conventional deburring device described above has difficulty removing 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 using this deburring tool.

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

[0011] To solve the above problems, this invention provides: A deburring tool for removing burrs formed at the ends of through holes and / or grooves that are at least partially through in a workpiece having through holes and / or grooves that are at least partially through, A cylindrical chuck part, A shaft portion having a diameter smaller than the diameter of the chuck portion, having one end fixed to the chuck portion or provided integrally with the chuck portion, either coaxially with the chuck portion or eccentrically with respect to the chuck portion. At the other end of the shaft portion, a deburring blade portion is provided, having a maximum diameter equal to or greater than the diameter of the shaft portion, with one end fixed to the shaft portion or integrally provided with the shaft portion, either coaxially with the shaft portion or eccentrically with respect to the shaft portion. This is a deburring tool that has the following features.

[0012] In this deburring tool, the chuck portion is secured by a spindle chuck, and when the spindle chuck is rotated, the cutting edge can perform a swivel motion (precession) with the middle of the shaft as the pivot point. The diameter of the cutting edge's swivel motion can be controlled by the rotation speed of the spindle chuck.

[0013] Typically, the chuck portion has a hole (through or non-through) through which the shaft portion passes, and the shaft portion is fixed to the chuck portion by driving one end of the shaft portion into this hole, hot or cold fitting, bonding, or a combination thereof. In one example, the chuck portion has a hole through which the shaft portion passes, and a female threaded hole is formed on the outer circumference of the chuck portion so as to reach this hole, and the shaft portion is fixed to the chuck portion by screwing a male thread into this threaded hole and pressing the shaft portion with the tip of the male thread. The chuck portion and the shaft portion may be formed integrally by machining (cutting) a rod. The shaft portion and the cutting edge portion may also be formed integrally by machining (cutting) a rod. The chuck, shaft, and cutting edge may be coaxial with each other; the shaft may be coaxial (concentric) with the chuck and the cutting edge may be eccentric with respect to the shaft; the shaft may be eccentric with respect to the chuck and the cutting edge may be coaxial with the shaft; or the shaft may be eccentric with respect to the chuck and the cutting edge may be coaxial with the chuck.

[0014] The cutting edge is configured to remove burrs formed at the ends of through holes and / or grooves that at least partially penetrate a workpiece. The cutting edge generally has a circular, convex polygonal, or concave polygonal cross-sectional shape, with convex polygons including triangles, squares, pentagons, hexagons, etc., and concave polygons also including triangles, squares, pentagons, hexagons, etc. If the cutting edge has a circular cross-sectional shape, it has one or more angular projections extending in the longitudinal direction of the cutting edge on its outer circumferential surface. The cutting edge may be tapered, including cases where the diameter decreases towards the tip and cases where the diameter increases. If necessary, abrasive grains are electroplated or welded to at least a portion of the surface of the cutting edge. The abrasive grains are not particularly limited and are selected as needed, but examples include diamond abrasive grains and boron nitride (BN) abrasive grains (QBN abrasive grains, etc.). The cutting edge may have a shape similar to the tip of a drill or reamer, and, if necessary, a groove is formed in the axial direction of the drill or reamer or in a direction intersecting that axial direction (for example, perpendicular to that axial direction) of the tip of the drill or reamer. The depth and width of the groove are selected as necessary.

[0015] The materials of the chuck, shaft, and cutting edge are selected according to the material of the workpiece, and include, for example, carbon steel for machine structures, steel wire, spring steel, high-speed steel, cemented carbide, and ceramics. For example, by constructing the cutting edge from cemented carbide or ceramics, the deburring performance can be maintained even when the cutting edge is heated to a high temperature.

[0016] The dimensions of each part of the deburring tool are selected according to the diameter of the through hole and groove width of the workpiece. For example, the length of the shaft is 10 mm to 100 mm, the diameter is 0.4 mm to 3 mm, the length of the cutting edge is 2 mm to 10 mm, and the maximum diameter is 0.8 mm to 5 mm. When the cutting edge is eccentric with respect to the shaft, the eccentricity of the cutting edge with respect to the shaft is 0.1 mm to 1.5 mm. When the shaft is eccentric with respect to the chuck, the eccentricity of the shaft with respect to the chuck is, for example, 0.1 mm to 2 mm.

[0017] The material of the workpiece is basically any material, and is not particularly limited, as long as burrs are generated at the ends of through holes and grooves when through holes or grooves that are at least partially through are formed in the workpiece. Examples include steel (including various types of stainless steel), non-ferrous metals, plastics (especially hard plastics), and wood. Examples of non-ferrous metals include, but are not limited to, aluminum alloys, titanium, titanium alloys, copper, and copper alloys. The type of workpiece is not particularly limited as long as it has through holes and / or grooves that are at least partially through, but examples include pistons for internal combustion engines, bearings for internal combustion engines, and perforated boards. In the case of pistons for internal combustion engines, there are through holes (oil holes) and ring grooves for the passage of oil. The diameter of these through holes and the width of the grooves are, for example, 1 mm to 5 mm. In the case of bearings for internal combustion engines, there are holes that penetrate the inner and outer surfaces, or oil grooves on the inner circumferential surface, for supplying lubricating oil for lubrication of the bearing. Perforated boards include, for example, iron perforated metal and wooden perforated boards. When the material of the workpiece is plastic, drilling holes generates heat during processing, causing the chips to form in a linear fashion. This, combined with the inherent properties of plastic, can result in soft burrs that remain inside the holes. However, with this deburring tool, the swivel motion of the blade entangles the linear burrs, and the centrifugal force provides a self-cleaning effect. This allows for deburring of the corners of the through-holes through continuous grinding by the blade. When the material of the workpiece is wood, drilling holes generates large burrs as the wood grain and fibers peel during processing. Unlike metals and plastics, peeling material is often present around the burrs. However, with this deburring tool, the burrs are efficiently removed through grinding from the base material and the self-cleaning effect of centrifugal force.

[0018] Furthermore, this invention, In a deburring device for removing burrs formed at the ends of through holes and / or grooves that are visible from the outside of a workpiece, by attaching a deburring tool to a spindle chuck, The deburring tool described above has a cylindrical chuck portion, and a shaft portion having a diameter smaller than that of the chuck portion, with one end fixed to the chuck portion coaxially with the chuck portion or eccentric to the chuck portion, or provided integrally with the chuck portion, and a deburring blade portion having a maximum diameter equal to or larger than the diameter of the shaft portion, with one end fixed to the other end of the shaft portion coaxially with the shaft portion or eccentric to the shaft portion, or provided integrally with the shaft portion. It is a deburring device having the above components.

[0019] The drive system of the deburring device can be appropriately selected from the drive systems of conventionally known deburring devices. In the invention of this deburring device, other matters than those described above are valid in relation to the invention of the above deburring tool.

[0020] Furthermore, this invention is a grinding tool for removing burrs, foreign substances or coating films formed on the surface of a workpiece, having a cylindrical chuck portion, and a shaft portion having a diameter smaller than that of the chuck portion, with one end fixed to the chuck portion coaxially with the chuck portion or eccentric to the chuck portion, or provided integrally with the chuck portion, and a grinding blade portion having a maximum diameter equal to or larger than the diameter of the shaft portion, with one end fixed to the other end of the shaft portion coaxially with the shaft portion or eccentric to the shaft portion, or provided integrally with the shaft portion. It is a grinding tool having the above components.

[0021] In this invention of a grinding tool, it is valid to interpret "deburring tool" as "grinding tool" and "deburring blade" as "grinding blade" when describing the invention of the deburring tool in relation to the above invention. The burrs, foreign matter, or coating film formed on the surface of the workpiece can be basically any kind and are not particularly limited. Specifically, burrs include, for example, burrs that occur along the mold mating surface when molten resin overflows from the dividing line when a workpiece is manufactured by resin molding, and burrs that occur on the edges of a workpiece when a ductile metal is press-molded (e.g., burrs from cutting, burrs and overflows from rolling). Foreign matter is, for example, foreign matter that occurs on the surface of a workpiece during or after its manufacture due to adhesion or local chemical reaction for some reason. Coating film is, for example, unwanted coating film that occurs in the pores or outer circumference of a workpiece after spray painting or dipping (immersion) painting, and unwanted plating film such as whiskers that occur in the pores or outer circumference of a workpiece after plating.

[0022] Furthermore, this invention, In a grinding apparatus for removing burrs, foreign matter, or coating films formed on the surface of a workpiece by attaching a grinding tool to a spindle chuck, The above grinding tool, A cylindrical chuck part, A shaft portion having a diameter smaller than the diameter of the chuck portion, having one end fixed to the chuck portion or provided integrally with the chuck portion, either coaxially with the chuck portion or eccentrically with respect to the chuck portion. At the other end of the shaft portion, a grinding blade portion having a maximum diameter equal to or greater than the diameter of the shaft portion is provided, with one end fixed to the shaft portion or integrally provided with the shaft portion, coaxially with the shaft portion or eccentrically with respect to the shaft portion. This is a grinding device that has [a certain feature].

[0023] In this invention of the grinding apparatus, the provisions described above in relation to the invention of the deburring cutting tool and the invention of the deburring apparatus are valid. [Effects of the Invention]

[0024] According to this invention, the chuck portion of the deburring tool is chucked onto the spindle chuck of a deburring device, and for example, the blade portion of the deburring tool is inserted near the end of a through hole or groove that at least partially penetrates a workpiece. By rotating the deburring tool with the rotation of the spindle chuck, the blade portion comes into contact with the end of the through hole or groove, thereby removing the burr. By selecting the diameter of the blade portion and shaft portion, and the rotation speed of the spindle chuck according to the diameter of the through hole or the width of the groove, burrs formed at the end of through holes with a diameter of about 2 to 3 mm or grooves with a width of about 2 to 3 mm can be easily removed. Furthermore, by chucking the chuck portion of the grinding tool onto the spindle chuck of the grinding device, for example, moving the blade portion of the grinding tool near the burrs, foreign matter, or coating film to be removed by grinding the surface of the workpiece, and rotating the grinding tool by the rotation of the spindle chuck, the blade portion comes into contact with the burrs, foreign matter, or coating film, making it easy to remove them. [Brief explanation of the drawing]

[0025] [Figure 1] This is a front view showing a deburring tool according to the first embodiment of this invention. [Figure 2] This is a cross-sectional view showing an example of the configuration of the blade portion of a deburring tool according to the first embodiment of this invention. [Figure 3] This is a cross-sectional view showing an example of the configuration of the blade portion of a deburring tool according to the first embodiment of this invention (Example 2). [Figure 4] This is a cross-sectional view showing example 3 of the configuration of the blade portion of a deburring tool according to the first embodiment of this invention. [Figure 5] This is a cross-sectional view showing an example 4 of the configuration of the blade portion of a deburring tool according to the first embodiment of this invention. [Figure 6] This is a front view showing a deburring tool according to a second embodiment of the present invention. [Figure 7] This is a front view showing a deburring tool according to a third embodiment of the present invention. [Figure 8] This is a cross-sectional view showing example 5 of the configuration of the blade portion of a deburring tool according to a third embodiment of the present invention. [Figure 9] This is a cross-sectional view showing an example 6 of the configuration of the blade portion of a deburring tool according to a third embodiment of the present invention. [Figure 10] This is a cross-sectional view showing an example 7 of the configuration of the blade portion of a deburring tool according to a third embodiment of the present invention. [Figure 11] This is a cross-sectional view showing an example 8 of the configuration of the blade portion of a deburring tool according to a third embodiment of the present invention. [Figure 12] This is a front view showing a deburring tool according to a fourth embodiment of the present invention. [Figure 13] This is a front view showing a deburring tool according to a fifth embodiment of the present invention. [Figure 14] This is a front view showing a deburring tool according to the sixth embodiment of the present invention. [Figure 15] This is a front view showing a deburring tool according to the seventh embodiment of the present invention. [Figure 16] This is a cross-sectional view showing the blade portion of a deburring tool according to the seventh embodiment of the present invention. [Figure 17] This is a front view showing a deburring tool according to the eighth embodiment of the present invention. [Figure 18] This is a right side view showing the blade portion of a deburring tool according to the eighth embodiment of this invention. [Figure 19] This is a front view showing a deburring tool according to the ninth embodiment of the present invention. [Figure 20] This is a right side view showing the blade portion of a deburring tool according to the ninth embodiment of the present invention. [Figure 21] This is a front view showing a deburring tool according to the tenth embodiment of the present invention. [Figure 22] This is a right side view showing the blade portion of a deburring tool according to the tenth embodiment of this invention. [Figure 23]This is a schematic diagram showing a deburring tool according to any of the first to tenth embodiments of this invention chucked in the spindle chuck of a deburring device, with the workpiece placed on the stage. [Figure 24] Figure 23 is a schematic diagram showing how a deburring tool removes burrs from the end of a through-hole in a workpiece, starting from the state shown in Figure 23. [Figure 25] As shown in Figure 24, this is a schematic diagram illustrating the process of removing burrs from the ends of through holes in a workpiece using a deburring tool, and then removing burrs from the ends of grooves in a workpiece using the same deburring tool. [Figure 26] This is a front view showing the steel piston used as the workpiece in the embodiment. [Figure 27] Figure 26 is an enlarged longitudinal cross-sectional view of the outer circumference of the piston along line AA. [Figure 28] This is a photograph serving as a substitute for a drawing, showing the through-hole in the workpiece before the burrs at the end of the oil hole are removed using a deburring tool in the embodiment. [Figure 29] This is a photograph serving as a substitute for a drawing, showing the through-hole after the burrs at the end of the oil hole in the workpiece have been removed using a deburring tool in the embodiment. [Figure 30] This is a photograph serving as a substitute for a drawing, showing the through hole in the workpiece before the burrs at the end of the ring groove are removed using a deburring tool in the embodiment. [Figure 31] This is a photograph serving as a substitute for a drawing, showing the through hole after the burrs at the end of the ring groove of the workpiece have been removed using a deburring tool in the embodiment. [Figure 32] These are a side view and a top view illustrating a method for removing burrs and gate residue formed on the surface of a resin molded product using a grinding device according to the eleventh embodiment of this invention. [Figure 33] These are a side view and a top view illustrating a method for removing burrs and gate residue formed on the surface of a resin molded product using a grinding device according to the eleventh embodiment of this invention. [Figure 34]These are a side view and a top view illustrating a method for removing burrs and gate residue formed on the surface of a resin molded product using a grinding device according to the eleventh embodiment of this invention. [Figure 35] These are a plan view and a cross-sectional view illustrating a method for removing unwanted paint films formed on the surface of a painted product using a grinding device according to the eleventh embodiment of this invention. [Figure 36] This is a cross-sectional view illustrating a method for removing unwanted coatings formed on the surface of a painted product using a grinding device according to the eleventh embodiment of this invention. [Figure 37] These are a plan view and a cross-sectional view illustrating a method for removing unwanted paint films formed on the surface of a painted product using a grinding device according to the eleventh embodiment of this invention. [Modes for carrying out the invention]

[0026] The following describes embodiments for carrying out the invention.

[0027] <First Embodiment> [Deburring tool] Figure 1 shows a deburring tool according to the first embodiment. As shown in Figure 1, this deburring tool consists of a cylindrical chuck portion 10, an elongated cylindrical shaft portion 20, and a blade portion 30, which are provided coaxially with each other. The diameter of the shaft portion 20 is smaller than the diameters of the chuck portion 10 and the blade portion 30. A through hole 11 is provided along the central axis of the chuck portion 10, and the shaft portion 20 is fixed to the chuck portion 10 by passing one end of the shaft portion 20 through this through hole 11. The shaft portion 20 is fixed to the chuck portion 10 by driving in one end of the shaft portion 20, hot or cold fitting, bonding, or a combination thereof. A through hole 31 is provided along the central axis of the blade portion 30, and the other end of the shaft portion 20 is passed through this through hole 31. The blade portion 30 is fixed to the shaft portion 20 by driving the other end of the shaft portion 20 into the through hole 31, hot or cold fitting, 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 electroplated onto at least a part of its surface. The blade portion 30 of configuration example 2 shown in Figure 3 has a triangular prism shape. The blade portion 30 of configuration example 3 shown in Figure 4 has a square prism shape. The blade portion 30 of configuration example 4 shown in Figure 5 has a concave hexagonal prism shape. If necessary, diamond abrasive grains are electroplated onto a part of the surface of the blade portion 30 of configuration examples 2 to 4, especially the surface or the entire surface of the protrusions.

[0029] The materials of the chuck portion 10, shaft portion 20, and blade portion 30 are selected as needed, but examples include carbon steel for machine structures, steel wire, spring steel, and high-speed steel. To give a specific example, the chuck portion 10 is made of carbon steel for machine structures (S45C), the shaft portion 20 is made of spring steel, and the blade portion 30 is made of high-speed steel.

[0030] The dimensions of the chuck portion 10, shaft portion 20, and blade portion 30 are selected as needed, but for example, they are as follows: The chuck portion 10 has a length of 15 mm to 25 mm and a diameter of 8 mm to 15 mm; the shaft portion 20 has a length of 40 mm to 80 mm and a diameter of 0.7 mm to 1.3 mm; and the 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, the chuck portion 10 has a length of 20 mm and a diameter of 10 mm; the shaft portion 30 has a length of 60 mm and a diameter of 1 mm; and the 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 the deburring device and the spindle chuck is rotated, as shown by the dashed line in Figure 1, the centrifugal force acting on the blade portion 30 causes the blade portion 30 to perform a swiveling motion (precession) with the middle portion of the shaft portion 20 as the pivot point. The diameter of the swiveling motion of the blade portion 30 can be controlled by the rotation speed of the spindle chuck according to the width of the through hole or groove that at least partially penetrates the workpiece. This swiveling motion brings the blade portion 30 of the deburring tool into contact with the burr formed at the end of the through hole or groove that at least partially penetrates the workpiece, thereby removing the burr.

[0032] As described above, according to this first embodiment, the deburring tool is composed of a cylindrical chuck portion 10, an elongated cylindrical shaft portion 20, and a blade portion 30, which are provided coaxially with each other. By chucking the chuck portion 10 with the spindle chuck of the deburring device and rotating it, the blade portion 30 can be made to oscillate, thereby bringing the blade portion 30 into contact with the burrs formed at the end of through holes or grooves that are at least partially through the workpiece, and thus the burrs can be easily removed. For example, even with through holes with a diameter of about 2 to 3 mm or grooves with a width of about 2 to 3 mm, the burrs formed at the ends of these can be easily removed by selecting the dimensions of the shaft portion 20 and the blade 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 screw hole 12 is formed on the outer circumference of the chuck portion 10 so as to reach the through hole 11, and a male screw 13 is screwed into this screw hole 12 and the shaft portion 20 is fixed to the chuck portion 10 by pressing the shaft portion 20 with the tip of the male screw 13. The rest of this deburring tool is the same as the deburring tool according to the first embodiment.

[0034] According to this second embodiment, the same advantages as the first embodiment can be obtained.

[0035] <Third Embodiment> [Deburring tool] Figure 7 shows a deburring tool according to the third embodiment. As shown in Figure 7, this deburring tool differs from the deburring tool according to the first embodiment in that the blade portion 30 is eccentric with respect to the shaft portion 20. The amount of eccentricity (the distance between the central axis of the shaft portion 20 and the central axis of the blade portion 30) is, for example, 0.2 mm or more and 0.5 mm or less, for example, 0.3 mm. The cross-sectional shapes of configuration examples 5 to 8 of the blade portion 30, corresponding to Figures 2 to 5, are shown in Figures 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 this third embodiment, the same advantages as the first embodiment can be obtained.

[0037] <Fourth Embodiment> [Deburring tool] Figure 12 shows a deburring tool according to the fourth embodiment. As shown in Figure 12, this deburring tool is similar to the deburring tool according to the third embodiment, except that, similar to the second embodiment, the shaft portion 20 is fixed to the chuck portion 10 by screwing a male screw 13 into a screw hole 12 formed on the outer circumference of the chuck portion 10 and pressing the shaft portion 20 with the tip of the male screw 13.

[0038] According to this fourth embodiment, the same advantages as the first embodiment can be obtained.

[0039] <Fifth Embodiment> [Deburring tool] Figure 13 shows a deburring tool according to the fifth embodiment. As shown in Figure 13, this deburring tool differs from the deburring tool according to the first embodiment in that the shaft portion 20 is eccentric with respect to the chuck portion 10. The amount of eccentricity (the distance between the central axis of the chuck portion 10 and the central axis of the shaft portion 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 this fifth embodiment, because the shaft portion 20 is eccentric with respect to the chuck portion 10, when the chuck portion 10 of the deburring tool is chucked by the spindle chuck and rotated, the blade portion 30 is more likely to swing. In addition, the same advantages as in the first embodiment can be obtained.

[0041] <Sixth Embodiment> [Deburring tool] Figure 14 shows a deburring tool according to the sixth embodiment. As shown in Figure 14, this deburring tool is similar to the deburring tool according to the fifth embodiment, except that, similar to the second embodiment, the shaft portion 20 is fixed to the chuck portion 10 by screwing a male screw 13 into a screw hole 12 formed on the outer circumference of the chuck portion 10 and pressing the shaft portion 20 with the tip of the male screw 13.

[0042] According to this sixth embodiment, the same advantages as those of the fifth embodiment can be obtained.

[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 blade portion 30 has four rectangular prism-shaped projections 32 extending in the axial direction (longitudinal direction) of the cylinder on the outer circumferential surface of the cylinder, spaced at 90° intervals around the central axis of the blade portion 30. Figure 16 shows the cross-sectional shape of the blade portion 30. The rest of this deburring tool is the same as the deburring tool according to the first embodiment.

[0044] According to this seventh embodiment, the same advantages as the first embodiment can be obtained.

[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 blade portion 30 is drill-shaped. The pitch of the drill-shaped blade portion 30 is selected as needed. Figure 18 shows a view of this blade 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 this eighth embodiment, the same advantages as the first embodiment can be obtained.

[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 blade portion 30 in the direction of the central axis of the blade portion 30. A view of this blade portion 30 from the tip side is shown in Figure 20. Other aspects of this deburring tool are the same as those of the deburring tool according to the first embodiment.

[0048] According to this ninth embodiment, the same advantages as those of the first embodiment can be obtained.

[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 blade portion 30 has a straight groove in the shape of a reamer. Figure 22 shows a view of this blade 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.

[0050] According to this tenth embodiment, the same advantages as the first embodiment can be obtained. In addition, it is possible to suppress the occurrence of unnecessary scratches and dimensional changes during deburring.

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

[0052] [Deburring method using deburring tools] 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 the workpiece 60 is fixed on the stage (not shown) of the deburring device. The workpiece 60 is provided with a through hole 61 visible from the outside and a groove 62 that is at least partially through, and these through holes 61 and grooves 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 to 5 mm. 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 central axis of the deburring tool, which is chucked in the spindle chuck 50, to a position slightly offset to one side from the central axis of the through hole 61, while keeping the central axis of the deburring tool and the central axis of the through hole 61 in the workpiece 60 parallel to each other.

[0054] Next, as shown in Figure 24, the spindle chuck 50 is lowered to move the tip of the blade portion 30 of the deburring tool past the end of the through hole 61. At this point, the drive system of the deburring device rotates the spindle chuck 50 to rotate the deburring tool. The direction of rotation can be clockwise or counterclockwise with respect to the direction in which the blade portion 30 is viewed from the chuck portion 10 of the deburring tool. The rotation of the deburring tool causes the blade portion 30 to pivot on a point midway along the shaft portion 20. The diameter of the pivoting motion can be controlled by the rotation speed of the spindle chuck 50. The diameter of the pivoting motion of the blade portion 30 is at least smaller than the diameter of the through hole 61, and typically sufficiently small, in order to prevent unnecessary damage to the inner wall of the through hole 61 by the blade portion 30. In this way, the blade portion 30 of the deburring tool pivots on a point midway along the shaft portion 20, so that the blade portion 30 contacts the vicinity of 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 blade portion 30 from the through hole 61. The burr 63 that has fallen onto the groove 62 will be removed later.

[0055] Next, as shown in Figure 25, the spindle chuck 50 is rotated 90 degrees to move the central axis of the deburring tool to a position slightly offset to one side from the central axis of the groove 62, while keeping the central axis of the chucked deburring tool and the central axis of the groove 62 in the workpiece 60 parallel to each other. Next, the spindle chuck 50 is moved toward the workpiece 60 until the tip of the blade 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 to rotate the deburring tool. The rotation of the deburring tool causes the blade portion 30 to pivot on a point midway along the shaft portion 20. The diameter of the pivoting motion of the blade portion 30 is at least smaller than the width of the groove 62, and typically sufficiently small, to prevent unnecessary damage to the inner wall of the groove 62 by the blade portion 30. In this way, the blade portion 30 of the deburring tool pivots on a point midway along the shaft portion 20, so that the blade portion 30 comes into contact with the end of the groove 62. This removes the burr 64 formed at the end of the groove 62. After this, the rotation of the spindle chuck 50 is stopped, the rotation of the deburring tool is stopped, and the deburring tool is moved away from the workpiece 60 to remove the blade portion 30 from the groove 62.

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

[0057] Examples 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 circumference of the piston 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 is 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 material of this steel piston contains 0.34-0.41% by weight of carbon (C), 0.15-0.8% by weight of silicon (Si), 1.2-1.6% by weight of manganese (Mn), up to 0.3% by weight of chromium (Cr), 0.08-0.2% by weight of vanadium (V), 0.02-0.06% by weight of sulfur (S), 0.01-0.02% by weight of nitrogen (N), up to 0.025% by weight of phosphorus (P), and up to 0.08% by weight of molybdenum (Mo), with the remainder being iron (Fe). It has a tensile strength of 800-950 MPa, a yield strength of 520 MPa, an elongation of 12%, and a hardness of HBW = 255.

[0059] The deburring tool used was a deburring tool according to the second embodiment, and the materials and dimensions of each part are as follows: The material of the chuck part 10 is S45C, the material of the shaft part 20 is spring steel, and the material of the blade part 30 is high-speed steel. The length of the chuck part 10 is 20 mm and the diameter is 8 mm, the length of the shaft part 20 is 60 mm and the diameter is 1.6 mm, and the length of the blade part 30 is 3 mm and the diameter is 2 mm. The rotational speed of the spindle chuck 50 was set to 11,000 rpm.

[0060] The burrs at the ends of the oil hole 71 and 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 were 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 were 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] <Embodiment 11> [Grinding equipment] In the grinding apparatus according to the 11th embodiment, a grinding tool having a configuration similar to the deburring tool according to the 1st to 10th embodiments described above is used, and the chuck portion 10 of this grinding tool is chucked by the spindle chuck 50, similar to the deburring apparatus shown in Figure 23.

[0062] [Method for removing burrs, foreign matter, or coating films using grinding tools]

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

[0064] First, the drive system of the grinding device moves the central axis of the grinding tool, which is chucked in the spindle chuck 50, to a position directly above or slightly offset from the object to be removed from the workpiece, while keeping the central axis of the grinding tool nearly 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 blade portion 30 of the grinding tool closer to the object to be removed from a position directly above or slightly offset from the object to be removed. In this way, the blade portion 30 of the grinding tool makes contact with the top or side surface of the object to be removed while performing a swiveling motion, and grinds away the object to be removed. The blade portion 30 is moved along the object to be removed, and all of the object to be removed is ground away. After this, the rotation of the spindle chuck 50 is stopped, the rotation of the grinding tool is stopped, and the grinding tool is raised.

[0066] As a result, the material to be removed from the surface of the workpiece can be easily removed.

[0067] Next, we will explain specific examples of workpieces and objects to be removed, and the methods for removing those objects.

[0068] (Specific example 1) Figures 32A and 32B show the resin molded product 80, with Figure 32A being a side view and Figure 32B being a top view. As shown in Figures 32A and 32B, the surface of the resin molded product 80 has burrs 81 formed on the mold mating surface during the melt molding of the resin, as well as gate residue 82. In addition, 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 blade portion 30 of the grinding tool is brought into contact with one end of the burr 81 while the blade portion 30 is swung, and the burr 81 is scraped off by moving the blade portion 30 along the burr 81 to the other end. Here, Figure 33A is a side view, and Figure 33B is a top view. Similarly, the burr 84 on the inner surface of the through hole 83 is scraped off by bringing the blade portion 30 of the grinding tool into contact with the burr 84 while the blade portion 30 is swung. Similarly, the gate residue 82 is scraped off by bringing the blade portion 30 of the grinding tool into contact with the gate residue 82 while the blade portion 30 is swung.

[0070] As a result, as shown in Figures 34A and 34B, burrs 81 and gate residue 82 formed on the surface of the resin molded product 80, as well as burrs 84 formed on the inner surface of the through hole 83, can be easily removed. Here, Figure 34A is a side view, and Figure 34B is a top view.

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

[0072] As shown in Figure 36, the blade portion 30 of the grinding tool is moved in a swiveling motion and brought into contact with one of the positions of the coating 102 on the edge of the painted product 100. The blade portion 30 is then moved along the coating 102 to scrape off the coating 102. Similarly, the coating 104 on the inner edge of the hole 103 is scraped off by moving the blade portion 30 of the grinding tool in a swiveling motion and bringing it into contact with the coating 104.

[0073] As a result, as shown in Figures 37A and 37B, unwanted coatings 102 and 104 formed on the surface of the painted product 100 can be easily removed. Here, Figure 37A is a plan view, and Figure 37B is a cross-sectional view along line BB in Figure 37A.

[0074] As described above, according to this 11th embodiment, burrs, foreign matter, or coating films formed on the surface of the workpiece can be easily removed.

[0075] Although embodiments and examples of this invention have been described in detail above, this invention is not limited to the embodiments and examples described above, and various modifications based on the technical idea of ​​this invention are possible.

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

[0077] 10...Chuck part, 20...Shaft part, 30...Cutting part, 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 the ends of through holes and / or grooves that are at least partially through in a workpiece having through holes and / or grooves that are at least partially through, A cylindrical chuck part, A shaft portion having a diameter smaller than the diameter of the chuck portion, having one end fixed to the chuck portion or provided integrally with the chuck portion, either coaxially with the chuck portion or eccentrically with respect to the chuck portion. At the other end of the shaft portion, a deburring blade portion is provided, having a maximum diameter equal to or greater than the diameter of the shaft portion, with one end fixed to the shaft portion or integrally provided with the shaft portion, either coaxially with the shaft portion or eccentrically with respect to the shaft portion. A deburring tool having a cutting edge.

2. The deburring tool according to claim 1, wherein the length of the shaft portion is 10 mm or more and 100 mm or less, and the diameter is 0.4 mm or more and 3 mm or less.

3. The deburring tool according to claim 2, wherein the length of the blade portion is 2 mm or more and 10 mm or less, and the maximum diameter is 0.8 mm or more and 5 mm or less.

4. The deburring tool according to claim 1, wherein the chuck portion has a hole through which the shaft portion passes, and the shaft portion is fixed to the chuck portion by driving the shaft portion into the hole, hot or cold fitting, bonding, or a combination thereof.

5. The deburring tool according to claim 1, wherein the chuck portion has a hole through which the shaft portion passes, a female screw hole is formed on the outer circumference of the chuck portion so as to reach the hole, and the shaft portion is fixed to the chuck portion by screwing a male screw into the screw hole and pressing the shaft portion with the tip of the male screw.

6. The deburring tool according to claim 1, wherein the shaft portion is coaxial with the chuck portion and the blade portion is eccentric with respect to the shaft portion.

7. The deburring tool according to claim 6, wherein the eccentricity of the blade portion with respect to the shaft portion is 0.1 mm or more and 1.5 mm or less.

8. The deburring tool according to claim 1, wherein the shaft portion is eccentric with respect to the chuck portion, and the blade portion is coaxial with the shaft portion.

9. The deburring tool according to claim 8, wherein the eccentricity of the shaft portion with respect to the chuck portion is 0.1 mm or more and 2 mm or less.

10. The deburring tool according to claim 1, wherein the blade portion has a circular, convex polygonal, or concave polygonal cross-sectional shape.

11. The deburring tool according to claim 1, wherein the blade portion has a circular cross-sectional shape, and the outer circumferential surface of the blade portion has an angular projection extending in the longitudinal direction of the blade portion.

12. The deburring tool according to claim 1, wherein abrasive grains are electroplated or welded to at least a portion of the surface of the blade portion.

13. The deburring tool according to claim 1, wherein the blade portion has a shape similar to the tip of a drill or reamer.

14. The deburring tool according to claim 1, wherein a groove is formed at the tip of the drill or reamer in the axial direction of the drill or reamer or in a direction intersecting the axial direction.

15. The deburring tool according to claim 1, wherein the chuck portion, shaft portion, and blade portion are made of carbon steel for machine structures, steel wire, spring steel, high-speed steel, cemented carbide, or ceramics.

16. The deburring tool according to claim 1, wherein the diameter of the through hole and the width of the groove are 1 mm or more and 5 mm or less.

17. The deburring tool according to claim 1, wherein the above-mentioned through hole and the above-mentioned groove intersect each other.

18. In a deburring device for removing burrs formed at the ends of through holes and / or grooves that are visible from the outside of a workpiece, by attaching a deburring tool to a spindle chuck, The above deburring tool, A cylindrical chuck part, A shaft portion having a diameter smaller than the diameter of the chuck portion, having one end fixed to the chuck portion or provided integrally with the chuck portion, either coaxially with the chuck portion or eccentrically with respect to the chuck portion. At the other end of the shaft portion, a deburring blade portion is provided, having a maximum diameter equal to or greater than the diameter of the shaft portion, with one end fixed to the shaft portion or integrally provided with the shaft portion, either coaxially with the shaft portion or eccentrically with respect to the shaft portion. A deburring device having the following features.

19. A grinding tool for removing burrs, foreign matter, or coating films formed on the surface of a workpiece, A cylindrical chuck part, A shaft portion having a diameter smaller than the diameter of the chuck portion, having one end fixed to the chuck portion or provided integrally with the chuck portion, either coaxially with the chuck portion or eccentrically with respect to the chuck portion. At the other end of the shaft portion, a grinding blade portion having a maximum diameter equal to or greater than the diameter of the shaft portion is provided, with one end fixed to the shaft portion or integrally provided with the shaft portion, coaxially with the shaft portion or eccentrically with respect to the shaft portion. A grinding tool having a cutting edge.

20. In a grinding apparatus for removing burrs, foreign matter, or coating films formed on the surface of a workpiece by attaching a grinding tool to a spindle chuck, The above grinding tool, A cylindrical chuck part, A shaft portion having a diameter smaller than the diameter of the chuck portion, having one end fixed to the chuck portion or provided integrally with the chuck portion, either coaxially with the chuck portion or eccentrically with respect to the chuck portion. At the other end of the shaft portion, a grinding blade portion having a maximum diameter equal to or greater than the diameter of the shaft portion is provided, with one end fixed to the shaft portion or integrally provided with the shaft portion, coaxially with the shaft portion or eccentrically with respect to the shaft portion. A grinding device having the following features.

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