JPH1110443A - Round hole deburring tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a round hole deburring tool which removes burr caused by machining a round hole in a platelike material on front and rear sides simultaneously. SOLUTION: A round hole deburring tool is provided with cutting blades 1, 2, 3, 4 in a tip part of a metal bar 5 like a flat plate. These cutting blades have an edge angle. The edge angle is set to about 95 degrees to reduce a bite-in amount of the cutting blade into a burr part and keep the optimum cutting condition. A handle 6 having a grip part which can rotate centered on a support shaft 7 is provided in the tip part of the metal bar which opposes to a cutting blade part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deburring tool for manually removing burrs generated when a circular hole is formed in a plate-shaped material such as a metal plate and a resin plate.

[0002]

2. Description of the Related Art To manually remove burrs generated when a circular hole is formed in a plate-like material such as a metal plate with a hole saw or the like, a round bar file or a reamer is used to cut off both burrs on both sides. Is going.

[0003]

The prior art has the following disadvantages. (A) Deburring by a file requires time and effort since the hand must be reciprocated many times. (B) The file and the reamer cannot simultaneously cut the burrs on the back side and the front side of the workpiece. (C) A space for inserting a file rod is required on the back side of the workpiece. Also, in the case of a reamer, a working space for use on the back side is required. Therefore, when the space on the back side cannot be secured, it is difficult to remove burrs.

[0004]

Means for Solving the Problems Cutting edges 1, 2, 3, 4 are provided at the tip of a flat metal rod 5 shown in FIG. This cutting edge has an edge angle of A as shown in FIG. A
By setting the edge angle to about 95 degrees, the amount of the cutting edge biting into the burr portion can be reduced, and the optimum cutting state can be maintained. A handle 6 having a grip portion rotatable around a support shaft 7 is provided at the tip of the metal rod facing the cutting edge.

[0005]

FIG. 3 shows a back burr 8 formed on the back side of the workpiece and a front burr 9 formed on the front side by the circular hole processing. As shown in FIG. 4, insert the cutting edge of the tool into a circular hole having burrs, hold the handle 6 in hand, slightly push the tool toward the workpiece side, and insert the tool handle around the circular hole. One rotation in either the right or left direction. Then, the cutting edge 1 or 2 scrapes the back burr 8, and at the same time, the cutting edge 3 or 4 scrapes the front burr 9.

[0006]

According to the present invention, both back burrs and front burrs generated by circular processing of a plate-like material can be removed simultaneously and quickly and finely. Also, since the space required on the back side of the workpiece is the smallest compared to a file or a reamer, deburring of a circular hole formed in a metal box or the like can be easily performed.

[Brief description of the drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2 is a sectional view of the cutting edge portion of the present invention.

FIG. 3 is a perspective view of a portion to be processed.

FIG. 4 is a perspective view showing a use state of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 cutting edge 2 cutting edge 3 cutting edge 4 cutting edge 5 flat metal rod 6 handle 7 support shaft 8 back burr (burr generated at back side cut of work material) 9 front burr (burr generated at front side cut of work material) )

Claims (1)

[Claims] 1. A burr-removing cutting edge 1 provided on a flat metal rod 5.
A circular hole deburring tool having 2, 3, 4, and a handle 6.