Deburring tool

Abstract

To provide a deburring tool that can efficiently deburr without damaging the edges of the object to be deburred. [Solution] A deburring tool 10 comprising a cylindrical body 13 having an inclined surface 14 with a cutting edge 19a at the outer end of the body 13, and a shank 11 extending axially from the base end of the body 13.

Description

Technical Field

[0003] , ,

[0004]

[0001] The present invention relates to a deburring tool.

Background Art

[0002] A deburring tool called a rotary burr is known (for example, Utility Model Registration No. 3188346). The rotary burr is used to remove burrs adhering to the edge of the cutting surface. The rotary burr is a rotary tool with a bar, and those having a cutting edge on a tapered surface with a thin tip, those having a cutting edge on a cylindrical surface, and those having a cutting edge on a tapered surface or a tip surface with a thick tip are known.

Summary of the Invention

Problems to be Solved by the Invention

[0003] There may be a case where a surface that should not be damaged, such as a cutting surface or a polishing surface, is arranged near the edge to be deburred (hereinafter referred to as the target edge). For example, the target edge may be deep inside the workpiece, and a mating surface may rise near the target edge. Also, there may be a case where the target edge is on the circumference of a boss portion arranged on the cutting surface, and the height difference between the surrounding cutting surface and the target edge is less than 1 mm to several millimeters. Further, the target edge may be arranged on the back surface as viewed from the tool. In these cases, the chamfer width after deburring may be extremely small, such as 0.5 mm or less. With conventional rotary burrs, it has been difficult to effectively remove the burrs on the edge when a surface that should not be damaged is arranged near the target edge. An object of the present invention is to provide a deburring tool that can perform deburring efficiently without damaging the area near the edge to be deburred.

Means for Solving the Problems

[0004] A first aspect of the present invention is a cylindrical body having an inclined surface with a cutting edge at an outer peripheral end, and a shank extending axially from the base end of the body, This is a deburring tool that has [a certain feature]. [Effects of the Invention]

[0005] According to the deburring tool of the present invention, deburring can be performed efficiently without damaging the vicinity of the edge to be deburred. [Brief explanation of the drawing]

[0006] [Figure 1] Front view of the deburring tool according to Embodiment 1 [Figure 2] View from arrow II in Figure 1 [Figure 3] Sectional view along line III-III in Figure 1 [Figure 4] Sectional view of line IV-IV in Figure 2 [Figure 5] Plan view of the machining process using the deburring tool of Embodiment 1 [Figure 6] Figure 5, section view along line VI-VI [Figure 7] Plan view of the machining process using the deburring tool of Embodiment 1 [Figure 8] Figure 7 shows a cross-sectional view along line VIII-VIII. [Figure 9] Perspective view of machining using a conventional deburring tool. [Figure 10] Front view of the deburring tool according to Embodiment 2 [Figure 11] Front view of the deburring tool according to Embodiment 3 [Modes for carrying out the invention]

[0007] <Embodiment 1> As shown in Figure 1, the deburring tool 10 of this embodiment has a shank 11 and a body 13. The shank 11 is, for example, a parallel shank. The shank 11 is connected to the body 13.

[0008] The body 13 has a tip surface 15, an inclined surface 14, a side surface 17, and a blade 19. The body 13 is a right cylindrical shape. In the axial direction, the direction away from the shank 11 is called the tip direction. Looking from the tip direction, the counterclockwise direction is called the rotation direction 5. The outer diameter of the body 13 is called the outermost diameter 31. The tip surface 15 is located at the tip of the body 13. The tip surface 15 is a plane perpendicular to the shank 11. A recess 15a may be located on the tip surface 15. The outer diameter of the tip surface 15 is called the effective diameter 33. The recess 15a may be omitted.

[0009] The inclined surface 14 is positioned on the leading edge of the body 13. As shown in Figure 3, the inclined surface 14 has a corner width 32 and a cutting angle 34. The corner width 32 and the cutting angle 34 may be set according to the workpiece. The corner width 32 is preferably less than 5 mm, and more preferably 0.3 mm to 1 mm. The cutting angle 34 is 30 to 60 degrees, for example, 45 degrees. An inclined surface 14 within this range can be adapted to many types of workpieces.

[0010] The side surface 17 is a right cylinder centered on the central axis 1. Preferably, the side surface 17 is finished smoothly. The blade 19 is positioned on the inclined surface 14. The blade 19 may be coated. The coating is made of a wear-resistant material. The coating is, for example, titanium nitride coating or diamond-like carbon (DLC) coating. As shown in Figure 4, the blade 19 has a cutting edge 19a, a rake face 19b, and a relief face 19c. The cutting edge 19a is not positioned on the tip face 15 or the side face 17. The rake angle 35 is -5 degrees to 5 degrees. The relief angle 36 is, for example, 30 degrees to 60 degrees.

[0011] The method of using the deburring tool 10 of this embodiment will be explained with reference to Figures 5 to 9. As shown in FIGS. 5 and 6, the machine tool 3 has a spindle 3a and a table 3b. The deburring tool 10 is attached to the spindle 3a. The workpiece 50 is placed on the table 3b. Hereinafter, for the sake of convenience, the right direction in FIG. 5 is referred to as the +X direction. For the sake of convenience, the upper direction in FIG. 5 is referred to as the +Y direction. For the sake of convenience, the upper direction in FIG. 6 is referred to as the +Z direction. Here, the deburring tool 10 may be attached to the spindle 3a via a telescopic tool holder 3c (see FIG. 9). The tool holder 3c is disclosed in, for example, Patent No. 6025580 and Patent No. 7260612.

[0012] The workpiece 50 has a burr generation surface 51, a polishing surface 52, a side surface 53, and an edge 54. The burr generation surface 51 is a flat surface that extends on the XY plane. The polishing surface 52 is a surface that must not be scratched. The polishing surface 52 extends in the +Z direction from the burr generation surface 51. The side surface 53 extends in the -Z direction from the burr generation surface 51. The side surface 53 has grooves (recesses) 55 that are periodically arranged. The grooves 55 have a semi-circular cross-section and extend in the Z direction. The edge 54 is a line where the burr generation surface 51 and the side surface 53 meet. The edge 54 has an edge 54a and an edge 54b. The edge 54b is a portion where the burr generation surface 51 and the groove 55 meet. The edge 54a is a portion of the edge 54 where the groove 55 is not arranged. Burrs 57 adhere to the edge 54 on the burr generation surface 51 side (+Z direction).

[0013] The spindle 3a rotates the tool in the rotational direction 5. The spindle 3a brings the tip surface 15 into contact with the burr generation surface 51 in a state where the side surface 17 is slightly separated from the polishing surface 52. Then, the spindle 3a is moved parallel to the polishing surface 52 at a predetermined cutting speed.

[0014] According to the deburring tool 10 of the present embodiment, no blade 19 is arranged on the side surface 17 of the body 13. Therefore, even if the side surface 17 comes into contact with the polishing surface 52, it is possible to suppress the polishing surface 52 from being scratched. Also, no blade 19 is arranged on the tip surface 15. Therefore, the deburring tool 10 does not cut the burr generation surface 51.

[0015] FIG. 9 shows a conventional conical burr removal tool 6 with a pointed tip. When the burr removal tool 6 is attached to the spindle 3a using the tool holder 3c, the tool holder 3c expands and contracts until the burr removal tool 6 contacts the workpiece 50. When machining the workpiece 50 using the burr removal tool 6, when the burr removal tool 6 approaches the edge 54b, the tool holder 3c extends. As a result, the burr removal tool 6 drops in the -Z direction with respect to the burr generation surface 51. Thereby, the amount of cutting (chamfer width) of the edge 54b becomes larger than that of the edge 54a.

[0016] As shown in FIGS. 5 and 6, the burr removal tool 10 of the present embodiment has an effective diameter 33 larger than the diameter 58 of the groove 55. The burr removal tool 10 is attached to the spindle 3a via the tool holder 3c. Then, the workpiece 50 is machined. Then, by the tool holder 3c, the tip surface 15 always abuts against the burr generation surface 51. And the Z-direction position of the burr removal tool 10 with respect to the burr generation surface 51 does not change. Therefore, the cutting amounts of the edges 54a and 54b can be kept substantially constant.

[0017] As shown in FIGS. 7 and 8, the workpiece 60 has a burr generation surface 61, a cutting surface 62, a side surface 63, and an edge 64. The burr generation surface 61 is in the +Z direction from the cutting surface 62. The burr generation surface 61 is the upper surface of the boss. The cutting surface 62 is a surface that must not be scratched. The height of the burr generation surface 61 from the cutting surface 62 is about 0.5 mm to 1 mm. The cutting surface 62 and the burr generation surface 61 may be curved surfaces. The side surface 63 surrounds the periphery of the burr generation surface 61. The edge 64 is the intersection of the burr generation surface 61 and the side surface 63. The edge 64 is a burr removal target portion. Burrs 67 adhere to the edge 64.

[0018] As shown in FIG. 8, the burr removal tool 10 is attached to the spindle 3a. The workpiece 60 is placed on the table 3b. Next, the spindle 3a rotates. As shown in FIGS. 7 and 8, the spindle 3a causes the blade 19 to abut against the edge 64 and rotate once around the edge 64 at the cutting speed.

[0019] The deburring tool 10 of this embodiment has a blade 19 at the tip corner of the body 13. Furthermore, the body 13 has a tip surface 15. The deburring tool 10 does not have a protrusion at its tip. Therefore, the tip of the body 13 does not come into contact with the cutting surface 62. Also, the blade 19 is positioned only on the inclined surface 14. Therefore, damage to the side surface 63 from contact with the blade 19 is suppressed.

[0020] <Embodiment 2> As shown in Figure 10, the deburring tool 100 of this embodiment has a shank 11 and a body 113. The body 113 has an inclined surface 114 and a blade 119. The body 113 is cylindrical. The inclined surface 114 is located at the base end edge of the body 113. The other structure of the inclined surface 114 is substantially the same as that of the inclined surface 14 of Embodiment 1. The blade 119 is located on the inclined surface 114. The blade 119 has a cutting edge 119a. The other structure of the blade 119 is substantially the same as that of the blade 19 of Embodiment 1.

[0021] The deburring tool 100 of this embodiment can remove burrs adhering to the back surface of a workpiece as viewed from the spindle on which the deburring tool 100 is mounted, and can also perform edge finishing.

[0022] <Embodiment 3> As shown in Figure 11, the deburring tool 200 of this embodiment has a shank 11 and a body 213. The body 213 is cylindrical. The body 213 has an inclined surface 14, a blade 19, an inclined surface 114, a blade 119, and a tip surface 15.

[0023] According to the deburring tool 200 of this embodiment, it is possible to remove burrs adhering to the front and back surfaces of a workpiece as viewed from the spindle on which the deburring tool 200 is mounted, and to perform edge finishing.

[0024] The present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention. All technical matters included in the technical concept described in the claims are covered by the present invention. The embodiments described above are preferred examples, but those skilled in the art can realize various alternatives, modifications, variations, or improvements from the contents disclosed herein, and these are included in the technical scope described in the appended claims. [Explanation of symbols]

[0025] 10,100,200 deburring tools 11 Shank 13,113,213 bodies 14,114 Slope 19a, 119a cutting edge

Claims

1. A cylindrical body having an inclined surface with a cutting edge at the outer end, A shank extending axially from the base end of the body, A deburring tool having the following features.

2. The body has the inclined surface at its tip, The aforementioned inclined surface has a diameter that decreases as it extends towards the tip. The deburring tool according to claim 1.

3. The body has the inclined surface at the base end, The inclined surface has a diameter that decreases as it extends towards the base end. A deburring tool according to claim 1 or 2.

4. The inclined surface has a plurality of cutting edges arranged around its entire circumference. A deburring tool according to claim 1 or 2.

5. The body has a flat tip surface at its tip, A deburring tool according to claim 1 or 2.

6. The corner width, which is the radial width of the inclined surface, is 1 mm or less. A deburring tool according to claim 1 or 2.

7. The cutting edge has a rake angle of -5 to 5 degrees. A deburring tool according to claim 1 or 2.

8. The cutting edge has a relief angle of 10 to 45 degrees. A deburring tool according to claim 1 or 2.

9. A deburring tool according to claim 1 or 2 for removing burrs located at the edge of a burr-generating surface having a recess, The effective diameter, which is the diameter of the tip of the body, is larger than the representative diameter of the recess. Deburring tool.

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