JPH04122412U - Rotary tool for deburring - Google Patents

Abstract

(57) [Summary] [Purpose] To downsize the belt sander and reduce the number of types of tools by downsizing the part that roughly removes burrs in the front stage of the grinding belt of the belt sander for deburring. [Structure] By forming right-handed and left-handed grooves 4 and 5 with the same lead on the circumferential surface of the cylindrical body 2, a diamond-shaped small convex portion 6 is formed.
The main body is provided with a shaft portion 3 or a shaft coupling portion so as to be able to support the main body and rotate around the central axis of the main body.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea eliminates burrs that occur when cutting, cutting, or drilling metal plates. Alternatively, use a wide belt sander configured to remove burrs. This invention relates to a rotary cutting tool for deburring used in the front stage of a rotor.

0002

[Conventional technology]

Extends the life of the grinding belt in conventional wide belt sanders for deburring. In order to increase the speed, there is a structure in which a rotary cutting tool is placed in front of the cutting tool. that time A plane milling cutter is used as a rolling cutting tool.

0003 A wide belt sander for deburring allows the metal plate to be deburred to run along the surface of the plate. Most of the burrs are first cut off with a plane mill while being sent along a predetermined transfer path in the direction of The remaining burrs are then removed using a grinding belt. used The plane milling cutter is a pair of twist milling cutters whose blades have opposite twisting directions; are placed close together in the front and back. Torsion milling is suitable for this type of deburring cutting. Although the cutting conditions are quite good, Since the workpiece will be cut, the support state of the workpiece is not necessarily strong, and one screw In edge milling, an axial component of the cutting force is generated, causing the workpiece to move laterally from the predetermined transport path. There is a problem where the burr moves to one side and becomes uneven, and due to the nature of the burr, it may not work properly depending on the cutting direction. There are some problems that cannot be removed, and for these reasons, it is necessary to Can be used in combination with another twist milling cutter with the opposite twist direction. It was done. In addition, in this type of deburring, when deburring, the workpiece Be careful not to scratch the surface of the metal plate, or remove any marks engraved on the metal plate. It is also required to ensure that cut numbers, part numbers, marking lines, etc. do not disappear.

0004

[Problem that the idea aims to solve]

A wide belt sander that uses a pair of conventional torsion milling cutters with opposite twist directions. - requires two tool heads that separately support and rotate two milling cutters. Therefore, there is a problem that the belt sander for deburring becomes large, and of course Since two types of tools are required, there is also a problem in that the number of types of tools increases.

[0005] The purpose of this invention is to solve the above-mentioned problems. In order to prevent the workpiece from moving laterally to the transport direction during picking, The technical challenge is to be able to remove burrs for use in stages.

[0006]

[Means to solve the problem]

The method of this invention is to form right-handed and left-handed grooves with the same lead on the circumferential surface of the cylindrical body. By doing so, a large number of small diamond-shaped convex portions are formed, supporting the main body and rotating the central axis of the main body. The main body is provided with a shaft portion or a shaft coupling portion so as to be rotatably driven.

[0007]

[Effect]

This rotary tool has a corner formed by the edge of a groove on the circumference of the main body, which is located at the front in the direction of rotation. It is the cutting edge. When the main body is rotated around the central axis, the small diamond-shaped protrusions will appear in the same way. Since it rotates in a predetermined diagonal direction, it can be installed on a wide belt sander to easily cut metal sheets. When used for cutting, the cutting force or impact force due to the small protrusions of the rhombus is caused by the rotation of the rhombus. Since it acts diagonally forward and perpendicular to the two front sides, the direction of rotation The force is divided into a forward component along the direction and a lateral component parallel to the center axis of the body, which is opposite to each other. When looking at each small convex part, the opposite lateral components of force are equalized. There may be cases where it is not equal, but in most cases it is equal, so in many small convex parts, the left and right sides are equal. They cancel each other out, leaving only the forward component force acting on the metal plate.

[0008] Therefore, the metal plate receives cutting force or impact force from one rotating tool. However, since several small convex parts act on one metal plate, the lateral component of force is They cancel each other out and move laterally within the predetermined transport path of the wide belt sander. Never.

[0009]

【Example】

One embodiment of this invention will be described using FIGS. 1 and 2. In the figure, 1 is The entire rolling tool is shown, and 2 is the main body and 3 is the shaft. The body 2 is made of tool steel, for example. Finally, the hardness of the blade is increased by heat treatment and polished. So The shape and size of is 850 m long, which corresponds to the width of the specified wide belt sander. m, and a left-handed groove 4 and a right-handed groove 5 are formed on the outer peripheral surface of a cylindrical body with an outer diameter of 70 mm. , and a large number of small diamond-shaped protrusions 6 are formed. Grooves 4 and 5 are for left and right windings. Although the directions are different, both have 4 threads, the lead is 100 mm, and the groove is perpendicular to the groove. The cross-sectional shape is also the same as shown in FIG. The groove opening width a in the same figure is 10 m. m, the angle θ between both sides of the groove is 30° (15° on one side), the groove depth d is 8mm, the groove bottom The width b is approximately 6 mm.

0010 This rotary tool 1 is equipped with a metal plate on the front stage of the grinding belt of a wide belt sander. It was installed so that the peripheral surface rotated at a position 0.5 mm away from the surface, and the rotation speed was 400 r. p. m. It is used to improve deburring processing before deburring and grinding using a grinding belt. I was able to do it well. In other words, it is fused and protrudes around 1mm in the thickness direction at the cut end. A metal plate with a thick burr is supplied, and the burr is removed almost from the position close to the root. No scratches were observed on the surface of the metal plate. grinding belt When removing burrs in the first stage, it is necessary to ensure that large protruding burrs are removed. This was a fully satisfactory result. Then, the metal plate is moved laterally from the predetermined transfer path. There was almost no movement in that direction. Note that this tool cannot be used to remove burrs. It seems more like a break-off caused by an impact than a cut.

[0011] In the above embodiment, the tool body 2 and the shaft portion 3 are integrally formed. However, depending on the case, it may be formed separately, in short, it can be formed by rotating around the central axis of the main body. It is sufficient if it can be driven.

0012 In the above example, the cross-sectional shape of the groove is shown as opening 30 degrees toward the open side of the groove. However, this angle θ may be changed within the range of 0° to 30°.

[0013]

[Effect of the idea]

As described above, according to this invention, the shape of the small convex part that acts on the rotating tool to remove burrs Therefore, the lateral component of the cutting force or deburring force is canceled out on the left and right, and almost no force acts. Because there is no one rotary tool in the front stage of the wide belt sander's grinding belt. Even when deburring is performed, the workpiece does not shift to one side on the transfer path. Therefore this rotary tool When using a wide belt sander, the mounting head of the rotary tool can be changed from the conventional two. It can be reduced to one. This reduces the size of wide belt sanders to conventional It can be made smaller than.

[Brief explanation of drawings]

FIG. 1 is a front view of a first embodiment of this invention.

FIG. 2 is an enlarged cross-sectional view of the groove 4 (or 5) perpendicular to the groove in the same embodiment.

[Explanation of symbols]

1 Rotary tool 2 Main body 3 Shaft part 4 Left-handed groove 5 Right-handed groove 6 Small protrusion

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Shoji Wada 5-8 Ichibancho, Nagata-ku, Kobe, Hyogo Prefecture Inside Kobe Cast Iron Works Co., Ltd.

Claims (2)

[Scope of utility model registration request] [Claim 1] By forming right-handed and left-handed grooves with the same lead on the circumferential surface of the cylindrical body, a large number of small diamond-shaped convex portions are formed, and the body can be supported and rotated around the central axis of the body. A rotary tool for deburring, characterized in that the main body is provided with a shaft portion or a shaft coupling portion. 2. The deburring rotary tool according to claim 1, wherein the inner surfaces of both sides of the groove are set in a range that is parallel to each other or is opened at an angle of 30 degrees toward the groove opening side.