JP2002210662A - Brush-like grinding wheel, and deburring and polishing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brush-like grinding wheel capable of adequately performing deburring and polishing work made of stainless steel, and a deburring and polishing method. SOLUTION: In this brush-like grinding wheel 1, one or more striped bodies 2 that are impregnated with binder resin and cured are banded with a collective thread comprising a plurality of silicon carbide filaments. The work W made of stainless steel is deburred and polished by free ends 5 of the striped bodies 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brush-like grindstone for deburring and polishing, and to a deburring and polishing method using the brush-like grindstone.

[0002]

2. Description of the Related Art Many works, such as dies for molding various parts, are made of stainless steel. For these workpieces, it is necessary to carry out deburring and surface polishing after various types of machining. Conventionally, wire brushes, nylon filament brushes containing abrasive grains, alumina A brush-like grindstone in which long fibers are hardened with a resin is used.

[0003]

However, in the case of a wire brush, a nylon filament brush containing abrasive grains, and a brush-like grindstone in which alumina long fibers are solidified with a resin, the polishing ability is low, so that a work made of stainless steel can be efficiently performed. There is a problem that deburring and polishing cannot be performed.

[0004] In view of the above problems, the object of the present invention is to:
An object of the present invention is to provide a brush-like grindstone capable of suitably performing deburring and polishing of a work made of a stainless steel material, and a deburring and polishing method.

[0005]

In order to solve the above-mentioned problems, a brush-like grindstone according to the present invention comprises a linear body obtained by impregnating and hardening a resin into an aggregate yarn comprising a plurality of silicon carbide long fibers. Alternatively, a plurality of the wires are bound, and the free end of the linear body moves relative to a work made of a stainless steel material to perform deburring and polishing on the work.

That is, in the deburring and polishing method according to the present invention, a linear body obtained by impregnating and hardening a resin into a set yarn composed of a plurality of silicon carbide long fibers or a brush-like grindstone in which a plurality of the linear bodies are bound The deburring and polishing of the work is performed by moving the free end of the work relative to the work made of stainless steel.

In the present invention, the linear body constituting the brush-like grindstone is obtained by impregnating and hardening a binder resin into a set yarn of silicon carbide long fiber, so that a wire brush, a nylon filament brush containing abrasive grains, Compared to a brush-like grindstone made of alumina long fiber hardened with resin, it has higher hardness and higher polishing ability. Therefore, since the cutting and polishing ability is high for a work made of sticky stainless steel material,
Work deburring and polishing can be performed efficiently. In addition, silicon carbide long fiber has a hardness suitable for deburring and polishing a work made of stainless steel material, and the linear body itself is appropriately worn while processing these materials. Then, a new surface is exposed. That is, in order to suitably deburr and polish the work, it is necessary to balance the hardness between the work and the brush-like grindstone, but between the brush-like grindstone according to the present invention and the stainless steel material. Good balance of hardness. Therefore,
These workpieces can be efficiently deburred and polished for a long period of time, and have a good finish.

[0008] In the brush-like grindstone of the present invention, in the linear body, the set yarn generally extends straight and the twist is not applied to the set yarn. It may be. By adding such a twist, the stiffness of the linear body is further strengthened, so that deburring and polishing of the work made of stainless steel can be performed efficiently.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A brush-like grindstone for deburring and polishing to which the present invention is applied and a deburring and polishing method using the brush-like grindstone will be described with reference to the drawings.

(Structure of Brush Whetstone) FIGS. 1 and 2
1 is a perspective view showing an example of a brush-like grindstone to which the present invention is applied, and an explanatory diagram showing an example of a deburring and polishing method using the brush-like grindstone.

In FIG. 1, a brush-shaped grindstone 1 to which the present invention is applied is obtained by binding a plurality of linear bodies 2 obtained by impregnating and hardening a set yarn of silicon carbide long fibers with a binder resin. As a collective yarn, for example, the fiber diameter is 8 to 50.
A silicon carbide long fiber having a length of 100 μm and a length of 100 to 3000 μm are used, and the diameter of the aggregated yarn is 0.1 mm to 2 mm.

[0012] As the linear body 2, usually, the aggregate yarn without twist is used, and the aggregate yarn is impregnated with a binder resin and cured to form the linear body 2. Moreover, the linear body 2 may be formed by using the linear body 2 in which a twist is added to the aggregated yarn, impregnating the aggregated yarn with a binder resin, and curing.

As the binder resin for impregnating and curing the set yarn, a thermosetting resin such as a silicone resin, a phenol resin, an epoxy resin, a polyimide resin, a polymaleimide resin, and an unsaturated polyester resin can be used.

The linear body 2 obtained by impregnating and curing a binder resin into a set yarn of silicon carbide long fiber is produced by various methods known as a so-called tow prepreg production method. It can be produced by curing a prepreg. For example, a set yarn composed of strands or yarns of silicon carbide long fiber is drawn out of a bobbin, continuously impregnated with a resin binder such as an epoxy resin, and wound and dried on an appropriate winding machine so as not to overlap. After that, a method of obtaining the linear body 2 by heating and curing, or by pulling out a set yarn consisting of strands or yarns of silicon carbide long fibers from a bobbin and continuously impregnating with a resin binder such as an epoxy resin, While heating and hardening through a heating furnace, the linear body 2 is wound around a drum having a diameter of about 80 cm.

After the linear member 2 is trimmed to a desired length, several tens to thousands of the members are bundled, and one end 4 is inserted into the pipe 3. Linear body 2
One end 5 is bound by bonding with a binder resin such as an epoxy resin or the like, and the brush-like grindstone 1 is manufactured.

The brush-like grindstone 1 thus manufactured
For example, as shown in FIG. 2, the linear body 2 is inserted into a pipe-shaped cap 6, and its free end 5 is adjusted to several mm to several tens cm according to the shape of the work W made of stainless steel. Exposed to the extent used.

(Deburring and Polishing Method) When deburring and polishing a work W made of stainless steel using such a brush-like grindstone 1, first, the work W is placed on a work table. Fix it.

On the other hand, for the brush-like grindstone 1, an arrow A
As shown by, the free end 5 of the brush-like grindstone 1 is pressed against the workpiece W while rotating the brush-like grindstone 1 about an axis L1 parallel to the direction in which the linear body 2 extends. Deburring and polishing of W are performed. At this time, if the area to remove burrs is narrow,
This state is maintained for a predetermined time, but when the area from which burrs are to be removed is large, the brush-like grindstone 1 is moved in a direction perpendicular to the axis L1 (in the direction of arrow C) to remove burrs on the work W. The brush-like grindstone 5 is moved to all the regions where the operation is to be performed.

As a result, the work W made of stainless steel is cut, polished, deburred and polished by the linear body 2 of the brush-like grindstone 1. At this time, since the linear body 2 constituting the brush-like grindstone 1 is obtained by impregnating and hardening a binder resin into a set yarn of silicon carbide long fiber, a wire brush, a nylon filament brush containing abrasive grains, and an alumina filament are used. Higher hardness and higher polishing ability than brush-like grindstones in which fibers are solidified with resin. Therefore, since the cutting and polishing ability is high even for a viscous work W, the work can be deburred and polished efficiently.

The silicon carbide long fiber has a hardness suitable for deburring and polishing a work W made of a stainless steel material. Wears moderately, exposing new surfaces. That is, in order to suitably deburr and polish the work W, it is necessary to balance the hardness between the work W and the brush-like grindstone 1, but the brush-like grindstone 1 according to the present invention and the stainless steel material The hardness balance is good. Therefore, these workpieces W can be efficiently deburred and polished for a long period of time, and the finish is good.

As a stainless steel material suitable for deburring and polishing with a brush-like grindstone using such silicon carbide long fibers, the total amount of alloying elements other than iron (Fe) is 5%.
The austenitic, ferritic, austenitic / ferritic, martensitic, precipitation hardening, and duplex stainless steels may differ depending on the content of chromium (Cr) and nickel (Ni) blended within a range not exceeding 0%. There are six types.

(Evaluation 1) Among the stainless steel materials, a reduction in the work W when the surface of the work W is polished while rotating the brush-like grindstone 1 at 1800 rpm using a plate material of SUS303 which is an austenitic stainless steel material as the work W. , Surface roughness, and the results of evaluation of the maximum values of the surface roughness are shown in FIGS. 3, 4, and 5, respectively. Here, SUS303 is an austenitic stainless steel and has high toughness, so that it is difficult to perform processing such as polishing. Therefore, if the SUS 303 can be deburred and polished satisfactorily, it can be satisfactorily deburred and polished on another stainless steel work.

FIG. 3 is a graph showing the change over time in the weight loss of a workpiece when the workpiece W is polished with various brush-like grindstones. In this graph, the greater the weight loss, the more the brush-like grindstone cuts the workpiece W. High polishing ability. FIG. 4 and FIG. 5 are graphs showing the time change of the surface roughness when the workpiece W is polished with various brush-like grindstones, and the time of the maximum value of the surface roughness, respectively. Good polishing finish. In the evaluation, as a working example of the present invention, a solid line L1 shows a result of polishing with a brush-like grindstone 1 using a linear body 2 made of an assembling yarn of silicon carbide long fibers having a thickness of 14 μm. As a comparative example, a dotted line L2 shows a result obtained by using a brush-like grindstone formed of a linear body made of an aggregated yarn of alumina long fibers having a thickness of 15 μm, and a result obtained by using a nylon brush containing abrasive grains is shown by one point. This is indicated by a dashed line L3.

As shown in FIG. 3, the cutting and polishing ability of the work W made of SUS303 is high because the brush-like grindstone using the linear body 2 made of the aggregated yarn of the silicon carbide long fiber and the alumina long fiber are used. The order is a brush-like grindstone using a linear body made of aggregate yarn, and a nylon brush containing abrasive grains.

As shown in FIG. 4 and FIG.
The finishing state of the polishing of the work W in S303 is good because the brush-like grindstone using the linear body 2 made of the aggregated thread of the silicon carbide long fiber and the linear body made of the aggregated thread of the alumina long fiber are used. The order is brush-like whetstone and nylon brush with abrasive grains.

As described above, the brush-like grindstone 1 using the linear body 2 composed of the aggregated thread of silicon carbide long fibers is made of SUS3
03 has high cutting and polishing ability for work W
Also, the finished state of the polishing is good.

(Evaluation 2) Next, among the stainless steel materials,
SUS420, a martensitic stainless steel material
J1 plate (made by Woodyholm, trade name: STAVA)
X) When the workpiece W is polished while the surface of the workpiece W is reciprocated at a speed of 3 m / min while rotating the brush-like grindstone 1 having a brush diameter of 42Φ and a 13 mm brush edge at 2400 rpm using the workpiece W as the workpiece W, FIGS. 6, 7, and 8 show the results of evaluating the weight loss, the surface roughness, and the maximum value of the surface roughness of the work W, respectively. Where S
US420JI is a martensitic stainless steel and is used in a wide range of fields such as resin molding dies.

FIG. 6 is a graph showing the change over time of the work loss when the work W is polished with various brush-like grindstones. In this graph, the larger the loss, the more the brush-like grindstone cuts the work W. High polishing ability. FIGS. 7 and 8 are graphs showing the time change of the surface roughness when the workpiece W is polished with various brush-like grindstones, and the time of the maximum value of the surface roughness, respectively. Good polishing finish. In the evaluation, as a working example of the present invention, a solid line L1 shows a result of polishing with a brush-like grindstone 1 using a linear body 2 made of an assembling yarn of silicon carbide long fibers having a thickness of 14 μm. As a comparative example, a dotted line L2 shows a result obtained by using a brush-like grindstone formed of a linear body made of a gathered yarn of alumina long fibers having a thickness of 15 μm.

As shown in FIG. 6, the ability to cut and polish the work W made of SUS420J1 is higher than that of the brush-like grindstone using the linear body made of the aggregate yarn of the alumina long fiber. It can be seen that the brush-like grindstone using the linear body 2 made of the collective yarn is much higher.

As shown in FIG. 7 and FIG.
The finished state of the polishing of the workpiece W made of S420J1 is based on the use of the linear body 2 made of the aggregated thread of the silicon carbide long fiber as compared with the brush-like grindstone using the linear body made of the aggregated yarn of the alumina long fiber. The result was that the brush-like whetstone was better.

As described above, the brush-like grindstone 1 using the linear body 2 composed of the aggregated yarn of silicon carbide long fiber is made of SUS4
Even for the work W made of 20J1, the cutting and polishing ability is high and the finished state of the polishing is good.

(Manufacturing method of brush-like grindstone 1) Such a brush-like grindstone 1 is manufactured by, for example, a method disclosed in Japanese Patent Application Laid-Open No. 2000-210847 filed by the present applicant. be able to. For example, a bobbin of a strand of silicon carbide long fiber obtained by bundling and continuously winding 500 filaments made of silicon carbide long fiber having a diameter of 10 μm to 15 μm in an untwisted state or after being twisted. Is set in a creel for releasing fibers, a strand is pulled out of the bobbin, and 100 parts by weight of an epoxy resin (trade name, Epicoat 828, manufactured by Yuka Shell Epoxy Co., Ltd.) and 3 parts of ethylamine trifluorborate are used.
Parts by weight, containing 0.7 parts by weight of imidazole and 35 parts by weight of methyl ethyl ketone) and impregnating the resin, and then continuously winding into a spool while removing excess resin with a squeezing roller. Thereafter, the resin is cured by heating at 160 ° C. for 1 hour in a hot-air drier to obtain a thin wire-shaped molded article (linear body 2) of silicon carbide fiber reinforced resin. Next, the formed body is cut from the bobbin, and then cut into a linear body 2 having a length of 100 mm. Next, as shown in FIGS. 1 and 2, one end 4 of these linear members 2 is embedded in a pipe 3 and then one end 4 of the linear member 2 embedded in the pipe 3 is epoxied. The other end is free end 5 by fixing with resin or silicone resin.
Is manufactured.

[Other Embodiments] When deburring and polishing a work W having deep irregularities on the surface, as shown in FIG. As shown by B2, it is preferable to vibrate the brush-like grindstone 1 along the direction in which the linear body 2 extends.

By combining such movements, when the brush-like grindstone 1 moves in a direction approaching the work W as shown by an arrow B1 even if the surface of the work W has irregularities,
Since the free end 5 of the linear body 2 enters the concave portion of the work W,
The surface of the work W is polished, and burrs are removed and polished to every corner of the irregularities. Here, the silicon carbide long fiber used for the brush-like grindstone 1 has high cutting and polishing ability because of its high hardness, but tends to be broken by that much, and as shown by the arrow B1, the brush When the whetstone 1 moves in a direction approaching the work W, the free end 5 of the linear body 2 is strongly pressed against the work W, and instead of increasing the deburring and polishing / cutting ability, the linear body 2 is moved. Will be greatly deformed. However, according to the method described here, the deformation of the linear member 2 caused by the vibrations indicated by the arrows B1 and B2 is released by the operation indicated by the arrows A and C, so that the linear member 2 is prevented from breaking. Is done. Therefore, even when deburring and polishing a work W having an uneven surface, it is possible to prevent the linear body 2 from being broken in the brush-like grindstone 1. Polishing can be performed efficiently and automation is also possible.

In the above-described embodiment, the brush-like grindstone 2 is formed by bundling the linear body 2 as shown in FIG. 2, but as shown in FIG. 8A, a plurality of bundles of linear bodies 2 are attached to lower end surface 81A.
9B, a plurality of bundles of linear bodies 2 are attached to a lower end surface 81B of a rectangular main body 8B as shown in FIG. 9B.
Are held in a toothbrush shape with a predetermined distribution. As shown in FIG. 9C, an outer peripheral surface 81 of a disk-shaped main body 8C is provided.
For C, a plurality of bundles of linear bodies 2 may be held at predetermined intervals. Further, as shown in FIG. 9D, the linear body 2 itself is an outer peripheral surface 81 of a disk-shaped main body 8D.
It may be embedded and held in D.

In the above embodiment, the brush-like grindstone 1
In moving the free end 5 of the workpiece W along the surface of the work W, the rotational movement indicated by the arrow A is used. , A reciprocating operation, an oscillation operation, or a combination thereof.

[0037]

As described above, in the present invention,
The linear body that composes the brush-like grindstone is made by impregnating and hardening a binder resin into a set yarn of silicon carbide long fiber, so a wire brush, nylon filament brush with abrasive grains, and alumina long fiber are hardened with resin. Higher hardness and higher polishing ability than a brush-like grindstone. Accordingly, the ability to cut and polish a work made of a sticky stainless steel material is high, so that deburring and polishing of the work can be performed efficiently. In addition, silicon carbide long fibers are:
Since it has a hardness suitable for deburring and polishing stainless steel workpieces, these workpieces can be efficiently deburred and polished for a long period of time, and the finish is good. .

[Brief description of the drawings]

FIG. 1 is an explanatory view of a brush-like grindstone to which the present invention is applied.

FIG. 2 is an explanatory view showing a deburring and polishing method using a brush-like grindstone to which the present invention is applied.

FIG. 3 is a graph showing a temporal change in weight loss when a workpiece made of SUS303 is polished with various brush-like grindstones.

FIG. 4 is a graph showing a temporal change in surface roughness when a workpiece made of SUS303 is polished with various brush-like grindstones.

FIG. 5 is a graph showing a temporal change in the maximum value of the surface roughness when a workpiece made of SUS303 is polished with various brush-like grindstones.

FIG. 6 is a graph showing a temporal change in weight loss when a work made of SUS420J1 is polished with various brush-like grindstones.

FIG. 7 is a graph showing a temporal change in surface roughness when a workpiece made of SUS420J1 is polished with various brush-like grindstones.

FIG. 8 is a graph showing a temporal change in the maximum value of the surface roughness when a workpiece made of SUS420J1 is polished with various brush-like grindstones.

FIG. 9 (A), (B), (C), (D)
It is explanatory drawing which shows the structure of the brush-like grindstone which can apply this invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Brush-like grindstone 2 Linear body 3 Pipe 4 One end 5 Free end 6 Cap W Work made of stainless steel

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3C058 AA06 AA09 CA01 CA04 3C063 AA07 AB03 AB05 AB09 BA17 BB04 BB11 BC03 EE29

Claims (4)

[Claims] 1. A linear body obtained by impregnating and curing a resin into a set yarn composed of a plurality of silicon carbide long fibers or a plurality of the linear bodies, and a free end of the linear body is formed of a stainless steel material. A brush-like grindstone for performing deburring and polishing on the workpiece by relatively moving the workpiece. 2. The brush-like grindstone according to claim 1, wherein, in the linear body, the aggregate yarn extends straight and no twist is applied to the aggregate yarn. 3. The brush-like grindstone according to claim 1, wherein in the linear body, a twist is added to the collective yarn. 4. A free end of a linear body obtained by impregnating and hardening a resin into a collective yarn composed of a plurality of silicon carbide long fibers or a brush-like grindstone in which a plurality of the bundles are bound to a work made of a stainless steel material. A deburring and polishing method characterized by performing deburring and polishing on the work by relatively moving the work.