JP2013220500A - Deburring tool and deburring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deburring tool and a deburring method capable of removing burr generated when a hole is perforated on a base material without the need of skill in work.SOLUTION: A deburring tool includes a shaft part 3 and a disk-like machining part 2 provided on a distal end of the shaft part, a grinding part 5 is provided on a distal end face of the machining part 2, and a circumferential edge part 6 projected more than the grinding part 5 is formed at a circumferential edge of the machining part 2. The deburring tool including the freely rotatable machining part whose circumferential edge part is projected more than the grinding part is abutted on the circumference of a hole perforated on a base material, and deburring is performed so that burr may slightly remain.

Description

  The present invention relates to a deburring tool and a deburring method for removing a burr generated when a hole is formed in a base material.

  Conventionally, when a hole is drilled in a base material with a tool, in particular, burrs generated when a through hole is drilled have been removed using a disk sander, a brush, or the like.

  However, when performing a deburring operation with a disk sander, a brush, or the like, especially when performing a deburring operation that requires high dimensional accuracy such as a heat exchanger, the required value cannot be satisfied unless it is a skilled worker. For this reason, a skilled worker needs to be engaged in the deburring work. Since the skilled worker is restrained by the deburring operation, there is a problem that other operations that require the skilled worker cannot be performed until the deburring operation is completed. Keeping deburring to the satisfaction is a burdensome task for the operator.

  In particular, in the case of a heat exchanger, the number of holes to be drilled is large, and the deburring operation may take two weeks or more, and the work efficiency is poor.

  In Patent Document 1, a notch portion is formed in the head portion of the tool main body, the tip of which forms a conical portion, at a position near the base end of the head portion from the top end of the conical portion, and the diameter of the notch portion. A guide attachment portion is formed on the opposite side of the direction, a blade tip is attached to the notch portion, and a guide piece slightly protruding from the circumferential surface of the conical portion is attached to the guide attachment portion, whereby the guide piece becomes a main component. A chamfering tool that slides into contact with the hole and prevents wear of the head portion is disclosed.

JP-A-9-225701

  In view of such circumstances, the present invention provides a deburring tool and a deburring method capable of performing a deburring operation without requiring skill of the operation.

  The present invention includes a shaft portion and a disk-shaped processing portion provided at a tip of the shaft portion, a grinding portion is provided on a tip surface of the processing portion, and the grinding portion is provided at a peripheral edge of the processing portion. Further, the present invention relates to a deburring tool in which a peripheral edge projecting more is formed.

  Further, the present invention relates to a deburring tool in which the grinding portion is a processing surface made of abrasive grains attached to the tip surface.

  The present invention also relates to a deburring tool in which a cylindrical concave portion is formed in the processed portion, a tool holder is fitted in the concave portion, and the grinding portion is fixed to the tool holder.

  The present invention also relates to a deburring tool in which the tool holder is detachable from the recess.

  According to the present invention, the processing part is composed of a cylindrical tool holder part and a cylinder body fitted on the tool holder part, and a grinding part is provided on a tip surface of the tool holder part, and the cylinder body This relates to a deburring tool in which the peripheral portion is formed by protruding from the grinding portion.

  Furthermore, according to the present invention, a deburring tool having a rotatable processing portion whose peripheral portion protrudes from the grinding portion is brought into contact with the periphery of a hole drilled in the base material, and the deburring tool slightly causes a deburring. The present invention relates to a deburring method for performing a deburring process so as to remain.

  According to the present invention, the shaft portion and the disk-shaped processing portion provided at the tip of the shaft portion are provided, the grinding portion is provided at the tip surface of the processing portion, and the periphery of the processing portion is provided with the grinding portion. Since the peripheral part protruding from the grinding part is formed, grinding of the burr is limited by the protrusion of the peripheral part with respect to the grinding part, so that excessive grinding can be prevented and depends on the skill level of the operator. The deburring process can be easily performed.

  Further, according to the present invention, a deburring tool having a rotatable processing portion whose peripheral portion protrudes from the grinding portion is brought into contact with the periphery of the hole drilled in the base material, and the deburring tool is used to slightly deburr. Therefore, the deburring process is performed so as to remain, so that it is possible to prevent the required deburring value from being excessively cut regardless of the skill level of the operator and to easily perform the deburring process.

It is a deburring tool concerning the 1st example of the present invention, (A) shows a perspective view of a deburring tool, and (B) shows an elevation sectional view of a deburring tool. It is explanatory drawing explaining the deburring by the deburring tool which concerns on a 1st Example. It is a deburring tool concerning the 2nd example of the present invention, (A) shows a perspective view of a deburring tool, and (B) shows an elevation sectional view of a deburring tool. It is explanatory drawing explaining the deburring by the deburring tool which concerns on a 2nd Example. It is a deburring tool which concerns on 3rd Example of this invention, (A) shows the perspective view of a deburring tool, (B) has shown the disassembled perspective view of a deburring tool.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, a deburring tool according to a first embodiment of the present invention will be described with reference to FIGS.

  The deburring tool 1 includes a disk-shaped processing portion 2 and a shaft portion 3 extending concentrically with the processing portion 2. The processed portion 2 and the shaft portion 3 are made of, for example, steel and are integrally formed. The shaft portion 3 can be held by a chuck of a processing device such as an electric drill, and the processing portion 2 is rotated by the processing device via the shaft portion 3.

  A circular recess 4 is formed at the center of the lower surface (tip surface) of the processed portion 2. The diameter of the recess 4 is set sufficiently larger than the diameter of a hole 8 (see FIG. 2) described later. Abrasive grains such as CBN (Cubic Boron Nitride) and diamond are attached to the bottom surface of the recess 4 by a required attaching means such as electrodeposition by nickel plating to form a processed surface 5 which is a grinding portion. In addition, you may adhere an abrasive grain to the bottom face of the said recessed part 4 by brazing as an attaching means.

  A peripheral edge 6 is formed around the recess 4, and the peripheral edge 6 protrudes from the tip of the abrasive grains of the processed surface 5 by a predetermined amount, for example, about 0.1 mm to 0.5 mm. The tip of is a flat surface.

  Next, referring to FIG. 2, for example, a deburring process using the deburring tool 1 which is one process of manufacturing a heat exchanger will be described.

  In FIG. 2, 7 indicates a tube sheet (tube sheet) which is a base material used in the heat exchanger. A large number of holes 8 are formed in the tube sheet 7 from the lower side to the upper side in FIG. By forming the hole 8, a burr 9 is formed at the upper end of the hole 8 over the entire circumference. Although the height of the burr 9 depends on the workpiece and the processing environment, for example, a burr 9 of about 5 mm is formed to protrude. In FIG. 2, reference numeral 11 denotes a residual burr after the deburring process is performed by the deburring tool 1.

  When the deburring tool 1 is used to remove the burr 9, the deburring tool 1 is mounted on a processing device (not shown), and the deburring tool 1 is rotated by the processing device. The shaft portion 3 is held perpendicular to the upper surface of the tube sheet 7, that is, the processing surface 5 covers the burr 9 in a state where the lower surface is parallel to the upper surface of the tube sheet 7. The deburring tool 1 is pressed vertically toward the tube sheet 7.

  In the process of pressing the deburring tool 1 toward the tube sheet 7, the work surface 5 comes into contact with the burr 9, whereby the burr 9 is ground by the abrasive grains attached to the work surface 5. .

  The deburring tool 1 is pressed, and the deburring process by the deburring tool 1 is completed when the tip of the peripheral edge 6 comes into contact with the upper surface of the tube sheet 7. When the deburring process is performed by the deburring tool 1, the residual burr 11 remains slightly at the upper end of the hole 8 by the amount of protrusion of the peripheral edge 6.

  In addition, since the front-end | tip of the said peripheral part 6 is a flat surface and the upper surface of the said tube sheet 7 is also a flat surface, the said peripheral part 6 and the said tube sheet 7 contact, and rotation of the said peripheral part 6 is carried out. Even when rubbed, the upper surface of the tube sheet 7 is hardly scratched.

  Finally, chamfering of about 0.5 mm is performed on the hole 8 with a finishing tool (not shown) using sandpaper or the like, whereby the residual burr 11 is removed and the removal of the burr 9 is completed.

  As described above, in the first embodiment, the peripheral edge 6 protruding from the processing surface 5 to which abrasive grains are attached is provided, and the burr 9 is removed by the deburring tool 1. The processing surface 5 does not grind the upper surface of the tube sheet 7. Therefore, the accuracy of the deburring operation using the deburring tool 1 is not affected by the skill level of the operator.

  Further, since the tip of the peripheral edge 6 and the upper surface of the tube sheet 7 are both flat, even when the tip of the peripheral edge 6 contacts the upper surface of the tube sheet 7, the upper surface of the tube sheet 7 is almost the same. Not scratched.

  Accordingly, by using the deburring tool 1 in the first embodiment, it is possible to easily perform the deburring process without requiring any skill, so that it is not necessary for the skilled worker to be dedicated to the deburring process. Can be engaged in work. Accordingly, there is no restriction on work sharing for the worker, and flexibility and work efficiency can be improved.

  Further, in the first embodiment, since the abrasive grains are attached to the bottom surface of the concave portion 4 by electrodeposition by nickel plating, the worn abrasive grains can be easily removed and new abrasive grains are easily attached. The deburring tool 1 can be reused and is economical.

  Next, referring to FIGS. 3A and 3B, a second embodiment of the present invention will be described.

  The deburring tool 12 in the second embodiment has a disk-shaped processing portion 13 and a steel shaft portion 14 extending concentrically with the processing portion 13. The processing portion 13 and the shaft The part 14 is integrally formed.

  The processed portion 13 has a cylindrical shape, and includes a housing 15 in which one end is closed and a cylindrical concave portion is formed, and a tool holder 16 fitted in the concave portion, and the length of the concave portion in the axial direction. On the other hand, the axial length of the tool holder 16 is shortened. The tool holder 16 is fixed to the housing 15 by a fixing tool 17 such as a bolt, and the tool holder 16 can be attached to and detached from the housing 15 by attaching and detaching the fixing tool 17.

  The tool holder 16 has a hyperbolic shape in which two portions located opposite to each other on the diameter of a cylinder are cut into a triangular prism shape, and recesses 18 and 18 are formed at the cut portions. Further, on one side surface adjacent to the recessed portion 18 of the excision site, for example, a cutting tip 19 which is a rectangular parallelepiped grinding portion is fixed to the tool holder 16 by a fixing tool 21 such as a bolt, and the tip of the cutting tip 19 is It protrudes from the tool holder 16 and recedes from the tip of the housing 15. In FIG. 3A, the cutting tip 19 is provided in one of the concave portions 18, but the cutting tips 19 and 19 may be provided in the concave portions 18 and 18, respectively.

  The open end of the housing 15 forms a peripheral portion 22, and the peripheral portion 22 protrudes from the tip of the cutting tip 19 by a predetermined amount, for example, 0.1 mm to 0.5 mm.

  FIG. 4 illustrates the case where the deburring process is performed using the deburring tool 12. In FIG. 4, the same components as those in FIG. 2 are denoted by the same reference numerals.

  The deburring tool 12 is mounted on a processing device (not shown), the deburring tool 12 is rotated, the lower surface of the deburring tool 12 is made parallel to the upper surface of the tube sheet 7, and the cutting tip 19 is placed on the deburring 9. In the positioned state, the deburring tool 12 is pressed vertically toward the tube sheet 7 so that the peripheral edge 22 contacts the upper surface of the tube sheet 7.

  In the process of pressing the deburring tool 12, the burr 9 is cut by the cutting tip 19, and when the peripheral edge 22 comes into contact with the upper surface of the tube sheet 7, the cutting tip is placed at the upper end of the hole 8. The remaining burrs 11 are slightly left by the amount of protrusion of the peripheral edge portion 22 with respect to 19.

  The deburring process using the deburring tool 12 is completed in a state where the residual burr 11 remains, and finally, a finishing tool (not shown) using a sandpaper or the like (not shown) as in the first embodiment. To remove the burr 9.

  In the second embodiment, since the cutting tip 19 is used as a grinding part for grinding the burr 9, the cutting speed is high and the durability is excellent. Further, the cutting tip 19 can be used repeatedly by removing and repolishing, which is economical.

  In the second embodiment, the recess 18 is formed and the cutting tip 19 is detachably provided by using the recess 18. However, the cutting tip 19 is attached to the lower surface of the tool holder 16. You may braze.

  Next, a third embodiment of the present invention will be described with reference to FIGS.

  The deburring tool 23 in the third embodiment has a disk-shaped processing portion 24 and a shaft portion 25 configured to extend concentrically with the processing portion 24, and the processing portion 24 and the shaft portion. 25 are integrally formed.

  The processing portion 24 includes a columnar tool holder portion 26 and a cylindrical tube body 27 that is externally fitted to the tool holder portion 26.

  The base end portion of the tool holder portion 26 is formed with a flange portion 28 that protrudes in the outer peripheral direction, and notches 29 and 29 are formed on the distal end side of the tool holder portion 26. The notches 29 and 29 have a hyperbolic shape in which two portions facing each other on the diameter of the cylinder are cut into a triangular prism shape. Further, on one side surface of the notches 29, 29, for example, rectangular cutting chips 31, 31 which are grinding parts are fixed to the tool holder part 26 by fixing tools (not shown) such as bolts, respectively. The tips of the cutting tips 31, 31 protrude beyond the tip of the tool holder portion 26. Further, on the peripheral surface of the tool holder portion 26, for example, screw holes 33 are formed in two places.

  For example, two holes 34 are formed in the peripheral surface of the cylindrical body 27, and the inner diameter of the cylindrical body 27 is substantially equal to the diameter of the tool holder portion 26. The cylindrical body 27 is positioned in the axial direction by bringing its end into contact with the flange portion 28, and a fixing tool 35 such as a bolt is connected to the screw hole 33 through the hole 34. The cylindrical body 27 is attached to the tool holder portion 26 by being screwed into the tool holder 26.

  At this time, the tip of the cylindrical body 27 protrudes from the tool holder portion 26 and further protrudes from the cutting tips 31 and 31 by a predetermined amount, for example, 0.1 mm to 0.5 mm. Forms the peripheral edge 36.

  In the third embodiment, the cylindrical body 27 forming the peripheral edge portion 36 is a separate member, and when the cylindrical body 27 is attached to the tool holder portion 26, the end of the cylindrical body 27 is connected to the flange portion. Since the cylindrical body 27 can be positioned in the axial direction simply by making it abut against it, the deburring tool 23 can be easily assembled without error.

  Further, since the size of the residual burr 11 (see FIG. 4) after the deburring operation can be adjusted by replacing the cylindrical body 27, the versatility of the deburring tool 23 in the deburring operation is improved. be able to.

  In the third embodiment, the cutting tip 31 is provided in each of the cutout portions 29 and 29. However, the cutting tip 31 may be provided in only one of the cutout portions 29 and 29. Needless to say.

DESCRIPTION OF SYMBOLS 1 Deburring tool 2 Processing part 3 Shaft part 5 Processing surface 6 Peripheral part 7 Tube sheet 9 Burr 11 Residual burr 12 Deburring tool 13 Processing part 14 Shaft part 15 Housing 16 Tool holder 18 Recessed part 19 Cutting tip 22 Peripheral part 23 Deburring part Tool 24 Processing part 25 Shaft part 26 Tool holder part 27 Cylindrical body 28 Flange part 29 Notch part 31 Cutting tip 36 Peripheral part

Claims (6)

  The shaft portion and a disk-shaped processing portion provided at the tip of the shaft portion are provided, a grinding portion is provided at the tip surface of the processing portion, and the periphery of the processing portion protrudes from the grinding portion. A deburring tool having a peripheral edge formed.   The deburring tool according to claim 1, wherein the grinding portion is a machining surface made of abrasive grains attached to the tip surface.   The deburring tool according to claim 1, wherein a cylindrical recess is formed in the processing portion, a tool holder is fitted into the recess, and the grinding portion is fixed to the tool holder.   The deburring tool according to claim 3, wherein the tool holder is detachable from the recess.   The processing part is composed of a cylindrical tool holder part and a cylinder body fitted on the tool holder part, and a grinding part is provided on a tip surface of the tool holder part. The deburring tool according to claim 1, wherein the peripheral edge is formed so as to protrude.   A deburring tool having a rotatable processing part whose peripheral part protrudes from the grinding part is brought into contact with the periphery of a hole drilled in the base material, and the deburring process is performed so that the deburring tool slightly remains. A deburring method characterized by:

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