JP2001121399A - Grinding tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grinding tool capable of grinding even a machined hole not extending linearly. SOLUTION: A brush unit 30 is held to a core member 20 formed of metal wires spirally twisted and bound so as to be freely curved in response to external force, in such a manner as to cover at least the tip part of a core machine 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding tool in which a grinding element such as a brush is brought into sliding contact with an object to be deburred or polished.

[0002]

2. Description of the Related Art FIG. 5 (a) shows a grinding tool generally used conventionally. In this grinding tool, a coil brush A is applied as a grinding element, and the coil brush A is slid into contact with a processing hole C of a workpiece B to remove burrs on an inner peripheral surface thereof or perform polishing. (See FIG. 6A).

As shown in FIG. 5 (b), for example, a coil brush A has a plurality of brush hairs E clamped on a clamping metal D having a U-shaped cross section. It is constituted by spirally winding around. Brush hair E
Are made of natural hairs or fibers, synthetic resin hairs or fibers, or those obtained by adding abrasive grains to them, or linear bodies such as metal thin wires.

[0004]

By the way, as shown in FIG. 6 (b), for example, as shown in FIG. 6 (b), the inside of the processing hole of the processing object B extends linearly such that the inside is curved or bent. There is no C '.

Since the coil brush A, which is a grinding element, cannot be inserted into the machining hole C 'which does not extend in a straight line up to the machining area, the inner peripheral surface of the coil brush A is used for deburring or polishing. It is difficult to perform grinding.

[0006] In view of the above circumstances, an object of the present invention is to provide a grinding tool capable of performing a grinding process even on a machined hole that does not extend linearly.

[0007]

According to the present invention, a grinding element is held on a core material which can be bent in response to an external force.

[0008] As the core material, a metal wire that is spirally twisted and bound can be used. Further, it is preferable that the grinding element is attached so as to cover at least a tip portion of the core material.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments. FIG. 1 conceptually shows one embodiment of a grinding tool according to the present invention. The grinding tool exemplified here is a deburring grinding tool suitable for deburring or polishing a processing hole of an object to be processed, similarly to the grinding tool shown in FIG. A core member 20 is provided at one end of a metal pipe member that functions as a chuck member to a machine, for example, a brass pipe member 10.

The core member 20 is formed by twisting a plurality of metal wires into a spiral shape. The core member 20 has a sufficient length with respect to the pipe member 10, for example, a linear shape having a length of about 1 m, and can be easily and elastically curved in response to an external force. is there.

The core member 20 has a brush unit 30 held at its front end as a grinding element. The brush unit 30 includes a resin-made cap member 31 provided so as to cover the distal end portion of the core member 20, and a number of brush bristles 32 implanted on the outer peripheral surface of the cap member 31. is there. The cap member 31 is a columnar member having a spherical tip. The cap member 31 is firmly fixed to the distal end portion of the core member 20 by an adhesive via a mounting hole (not shown) provided on the base end surface. Brush hair 3
2 is a natural hair or fiber, or a synthetic resin hair or fiber or a material obtained by adding abrasive grains to the hair or fiber, or a linear material such as a metal thin wire. Each of the cap members 31 is firmly held by an adhesive in a planting hole 33 provided in a tip end portion and a peripheral surface thereof.
The brush unit 30 has a processing hole 4
When inserted into the hole 1, the brush bristles 32 have a cylindrical shape with an outer diameter slightly larger than the inner diameter of the processing hole 41 so that the brush bristles 32 are pressed against the entire inner peripheral surface.

[0012] The deburring grinding tool configured as described above is held by a processing machine via the pipe member 10,
In a state where this is rotated at a high speed, for example, as shown in FIG. 2A, it is inserted into a processing hole 41 provided in a processing object 40,
When each of the bristles 32 of the above-described brush unit 30 is pressed against the inner peripheral surface of the processing hole 41, the brush bristles 32 of the rotating brush unit 30 and the processing hole 41 relatively come into sliding contact with each other. It becomes possible to remove the burrs generated in the holes 41 and to polish the inner peripheral surface. in this case,
Since the tip of the core material 20 is covered with the cap member 31 in which the brush bristles 32 are implanted, even if the tip of the deburring grinding tool rotated at high speed contacts the workpiece 40, There is no danger that the workpiece 40 will be seriously damaged. In particular, as shown in FIG. 2 (a), when grinding is performed on the inner peripheral surface of the processing hole 41 whose inside is closed, when the deburring grinding tool is inserted into the processing hole 41, the two are removed. Although it is difficult to recognize the positional relationship, there is no possibility that the core material 20 comes into contact with the inner wall surface of the processing hole 41, and there is no possibility that the core material 20 may be damaged.
As a result, it is possible to use the processing object 40 made of resin as well as the metal processing object 40 with security, and the use of the processing object 40 is greatly expanded.

Here, in the deburring grinding tool, as described above, a tool that can easily and elastically bend in response to an external force is applied as the core material 20 for holding the brush unit 30. I am trying to do it. Therefore, as shown in FIG. 2 (b), the deburring grinding tool is also used for the workpiece 40 in which the processing hole 41 'is curved and extends and in which a processing part to be subjected to the grinding is provided. Is rotated and inserted into the processing hole 41 ′, the brush unit 30 sequentially advances inside by guiding the brush bristles 32 while the core material 20 is appropriately curved, and eventually reaches the processing site. In addition, it is possible to sufficiently perform the grinding process on the processed portion.

FIG. 3 shows a modification of the above-described deburring grinding tool. The deburring grinding tool of this modification is the same as the deburring grinding tool shown in FIG.
In addition, a plurality of brush units 50 and 60 are further added. Brush unit 50 to be added,
As 60, any one may be applied.
In the modification shown in FIG. 7, a pair of coil brushes 50 and a pair of roll brushes 60 are alternately arranged. Similar to the coil brush 50 shown in FIG. 5A, the coil brush 50 has a large number of brush bristles 51 sandwiched between clamping metals (not shown) having a U-shaped cross section. It is configured by spirally winding around the periphery. The roll brush 60 is configured by implanting a large number of brush bristles 62 on the outer peripheral surface of a cylindrical brush base 61.

Also in the deburring grinding tool of this modification, after being held by the processing machine via the pipe member 10,
In a state where this is rotated at a high speed, it is inserted into a processing hole provided in the processing object, and the above-mentioned respective brush units 30,
When the brush bristles 32, 51, and 62 of 50 and 60 are pressed against the inner peripheral surface of the processing hole, the rotating brush unit 3 is rotated.
The 0, 50, and 60 brush bristles 32, 51, and 62 are relatively in sliding contact with the processing holes, so that burrs generated in the processing holes can be removed and the inner peripheral surface can be polished. .
In this case, since the plurality of brush units 30, 50, and 60 come into sliding contact with a plurality of locations of the processing hole, it is possible to simultaneously perform the grinding on the plurality of locations, and it is extremely advantageous in terms of workability. Becomes In addition, core material 2
The cap member 31 having the brush hair 32 implanted at the tip of the cap member 31
Even if the tip of the deburring grinding tool rotated at a high speed contacts the workpiece, there is no danger of damaging the workpiece. Same as the form.

Further, in the deburring grinding tool of this modification, the core member 20 holding the plurality of brush units 30, 50, 60 is easily and elastically curved in response to an external force. Is the same as Therefore, as shown in FIG.
It is possible to simultaneously perform grinding on a plurality of 1 ″ locations.

In the above-described embodiments and modifications,
Although a grinding tool using a brush unit such as a coil brush or a roll brush as a grinding element is illustrated, the present invention is not limited thereto. For example, other brush units such as a wheel brush and a torsion brush may be applied as the grinding element, or metal wires having a polygonal cross section may be arranged along the axial direction of the core material, and the ridge line of each metal wire may be applied. It is also possible to apply a material that performs a grinding process as a grinding element. Further, a core material in which a metal wire is spirally twisted and bound is illustrated, but any other material may be used as long as it can bend according to an external force. In this case, the material is not necessarily required to be metal.

[0018]

As described above, according to the present invention,
As a core material holding the grinding element, a material that can be bent according to an external force is applied, so that the core material is appropriately curved even when the processing hole does not extend linearly. As a result, it is possible to dispose the grinding element at the processing portion and sufficiently perform the grinding.

[Brief description of the drawings]

FIG. 1 is a side view conceptually showing one embodiment of a grinding tool according to the present invention.

FIGS. 2A and 2B are views showing a use mode of the grinding tool shown in FIG. 1, wherein FIG. 2A is a conceptual view showing a use mode for a processing hole extending linearly, and FIG. FIG.

FIG. 3 is a side view conceptually showing a modified example of the grinding tool according to the present invention.

FIG. 4 is a conceptual diagram showing a use mode of the grinding tool shown in FIG.

FIG. 5 conceptually shows a conventional grinding tool, in which (a)
Is a side view, and (b) is an enlarged view of the brush.

FIGS. 6A and 6B are views showing a use mode of the grinding tool shown in FIG. 5, wherein FIG. 6A is a conceptual view showing a use mode for a processing hole extending linearly, and FIG. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Pipe member 20 Core material 30,50,60 Brush unit 31 Cap member 32,51,62 Brush bristle 33 Planting hole 40 Object 41,41 ', 41 "Processing hole

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // B24B 9/00 602 B24B 9/00 602E

Claims (3)

[Claims] 1. A grinding tool wherein a grinding element is held on a core material that can be bent in response to an external force. 2. The grinding tool according to claim 1, wherein the core material is formed by spirally twisting a metal wire. 3. The grinding tool according to claim 1, wherein the grinding element is attached so as to cover at least a tip portion of the core material.