JPH11216677A - Lapping material and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lapping material difficult to generate a vertical crack, preventing a side slip even in the case of grinding/polishing relating to a grinding/polishing surface, providing a good biting property against the grinding/ polishing surface, and improving grinding/polishing efficiency. SOLUTION: An inorganic long fiber 1 impregnated with thermosetting resin, is wound traversingly in a periphery thereof along a rotational direction of a rotary unit, cut to open a formed material wound onto this rotary unit in its axial direction, spread into sheet shape, and laminated with plurality of sheets when necessary to form a lapping material block 20, by press heating and hardening. This lapping material of a flat plate-shaped formed body impregnating the inorganic long fiber 1 with the thermosetting resin, by slicing in flat plate shape so as to become a traversed surface side of this block 20 in a flat surface side at lapping time, the inorganic long fiber 1 is oriented in right/left symmetrical two directions relating to a polishing direction. Here, the inorganic long fiber 1 is preferable oriented in right/left symmetrical two directions at a 10 to 45 deg. angle relating to the polishing direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lapping material suitable for deburring and polishing. More specifically, for deburring and polishing of iron or iron alloy, aluminum or aluminum alloy, copper or copper alloy, magnesium alloy, nickel or nickel alloy, and polishing of these molds. It relates to a suitable polishing wrapping material.

[0002]

2. Description of the Related Art For example, as disclosed in Japanese Utility Model Publication No. 51-12796 and Japanese Patent Application Laid-Open No. 1-222865, a molded product obtained by solidifying inorganic long fibers with a thermosetting resin is extremely useful as a wrapping material. In particular, it is a well-known fact that, since the fiber diameters are uniform, linear scratches do not occur on the polished surface of a mold or the like, and finishing of the mold or the like is possible even for an amateur.

[0003]

According to the above prior art, the finishing efficiency (working efficiency) of the finished surface must depend on the fiber diameter. First, a wrapping material made of a fiber having a large fiber diameter such as 40 μm is required. Rough polishing with fiber diameter 15
Polishing was performed using a wrapping material composed of fibers of about μm, and finally polishing was performed using a wrapping material composed of fibers having a fiber diameter of about 10 μm. Finally, buffing was performed with abrasive powder. However, Japanese Patent Laid-Open Publication No.
As in the case of the wrapping material disclosed in Japanese Patent Publication No. 5 (1999) -1994, a stick-shaped wrapping material made by cutting out a formed plate made by aligning fibers in one direction has a thickness of 0 because the yarns are aligned in the polishing direction. When a stick having a thickness of 0.5 mm to 1 mm is used, when a twist is applied to the stick, cracks are likely to occur in the direction of the yarns aligned in one direction, which has a drawback of causing a so-called vertical crack. Was. In addition, when polishing with this stick, the direction of polishing is not fixed because the yarns are aligned in one direction, and the polishing direction is inevitably polished slightly but left and right, causing so-called horizontal slippage A phenomenon was seen.
In addition, since the grinding and polishing are performed on the leading end surfaces of the fibers aligned in one direction, the fiber diameter must be increased in order to increase the efficiency in the rough polishing region where the fiber diameter is 40 μm or more. Therefore, it is necessary to study the production of a yarn that is difficult to produce when the fiber diameter is large. Therefore, the present invention hardly causes a vertical crack even in a stick shape having a thickness of 0.5 to 1 mm suitable for polishing a thin groove such as a rib of a mold. Does not cause side slip, and has good bite against grinding and polished surfaces.
It is an object of the present invention to provide a wrapping material with improved polishing efficiency. That is, the present invention provides grinding in each of the above steps,
This provides a means for improving the efficiency of polishing.

[0004]

Means for Solving the Problems As a method of increasing the grinding and polishing efficiency using a fiber having a constant fiber diameter, the present inventors have conducted intensive studies and found that the direction of grinding and polishing and the direction of aligning the fibers were improved. And a certain angle between them, and not from one direction, but from the plate obtained by shaking the twill in both the left and right directions with respect to the grinding and polishing directions. By using a stick obtained by slicing in parallel as a wrapping material, the stick was not twisted in one direction even during polishing, and the grinding and polishing efficiency was significantly improved. That is, the wrapping material of the present invention according to claim 1 is a wrapping material in which a thermosetting resin is impregnated into a flat molded body, and the inorganic long fibers are symmetrical in two directions with respect to a polishing direction. It is characterized by being oriented. Further, the wrapping material according to the second aspect is characterized in that the inorganic long fibers are polished 10 times in the polishing direction.
It is characterized by being oriented in two symmetrical directions at an angle of up to 45 degrees. Further, the wrapping material according to claim 3 is characterized in that the inorganic long fiber is 12.5 to 45 with respect to the polishing direction.
It is characterized by being oriented in two symmetrical directions at an angle of degrees. Further, the wrapping material according to claim 4 is characterized in that the inorganic long fibers are oriented by traverse in two directions symmetrical to the polishing direction. The wrapping material according to claim 5, wherein the inorganic long fiber is an inorganic long fiber selected from the group consisting of glass fiber, alumina fiber, silicon carbide fiber, boron fiber and silicon nitride fiber. Features. The wrapping material according to claim 6 is characterized in that the inorganic long fiber is contained in an amount of 70 to 85% by weight. In the method for producing a wrapping material according to the present invention, the inorganic long fiber impregnated with a thermosetting resin is wound around the rotating body while being traversed along the rotating direction of the rotating body. The molding material wound up is cut in the axial direction of the rotating body, cut open, spread in a sheet shape,
If necessary, multiple layers are laminated and cured by pressing under heat and pressure to create a wrapping material block, and sliced into a flat plate so that the traversed surface of this block is the flat surface side during lapping It is characterized by doing. The method for producing a wrapping material according to claim 8 is as follows.
The traverse is parallel wound. A wrapping material manufacturing method according to a ninth aspect is characterized in that the traverse is helically wound.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A stick-shaped wrapping material prepared by orienting fibers in two directions symmetrical to the grinding and polishing directions without aligning the fibers in one direction has the following characteristics. First, since the fibers are oriented in two directions with respect to the grinding and polishing directions, the stick does not twist in one direction during grinding and polishing. Further, compared to a stick in which fibers are oriented only in one direction, a vertical crack is less likely to occur when the stick is twisted. In particular, the thickness is 0.5 to 1 m
This is significant for sticks with a small thickness of m.

Further, by arranging the fibers in two directions symmetrical with respect to the grinding and polishing directions, each long fiber 1 has a long axis in a direction orthogonal to the polishing direction, as shown in FIG. Since the fiber end face having an elliptical shape is provided, the outer peripheral edge 1a on the front end side of the fiber end face acting on the material to be polished becomes longer, and the efficiency of grinding and polishing increases. Thus, as shown in FIG.
Although the wrapping material for grinding and polishing of the long fiber 1 having the normal circular fiber end and the fiber content are the same, the outer peripheral edge 1a of the front end side of the fiber end surface acting on the polished material on the polished surface is not As the length increases, the grinding and polishing efficiency increases, and the efficiency can be increased as if a thicker fiber were used.

Further, since the fibers are oriented in two directions symmetrical with respect to the grinding and polishing directions, they do not slide during grinding and polishing, and the efficiency in precision polishing is increased. In other words, by traversing the fiber in both directions in this manner, the biting of the workpiece during grinding and polishing is improved, and the grinding and polishing efficiency is increased.

[0008] Examples of the inorganic fibers include glass fibers, alumina fibers, silicon carbide fibers, boron fibers, and silicon nitride fibers. Silicone fibers are particularly suitable for polishing iron, nickel and their alloy materials,
Glass fibers are particularly suitable for aluminum, copper and magnesium alloys.

UD wherein the inorganic filaments are aligned in one direction
The wrapping material as described above is obtained by laminating several layers of prepreg so as to have a constant angle in the left and right directions and cutting it out by pressing the fiber so that the fiber is oriented at an equal angle to the left and right with respect to the grinding and polishing directions. Can be. In addition, the fiber bundle of the inorganic long fiber is impregnated with the resin by passing the resin into the resin, and the filament is wound around the cylinder by winding a twill at an angle θ with respect to the circumferential direction by a so-called helical winding method by a filament winding method. The sheet is cut open in the axial direction of the cylinder, formed into a sheet, and subjected to heat press molding. As shown in FIG.
A block material 20 in which the fiber bundle 11 of the inorganic long fiber 1 is oriented in two directions is obtained.
1 is cut out to obtain the wrapping material.
In addition, by so-called parallel winding, the cylinder is wound rightward to a width such that the angle with respect to the circumferential direction is 10 to 45 degrees, and the next layer is repeatedly wound leftward, so that each layer has the right, A block may be formed by forming a layer having an angle in the left direction and hot pressing.

The thermosetting resin impregnated with the inorganic long fibers is not particularly limited, but is preferably a thermosetting resin such as an epoxy resin and a phenol resin. Particularly when heat resistance is required, polyimide, polyamide, polymaleimide resin and the like are used. The fiber content of the wrapping material is desirably in the range of 60 to 87% by weight. In addition,
If the amount is less than 60% by weight, the polishing property is reduced. If the amount is more than 87% by weight, the adhesion of the inorganic long fibers is deteriorated and the strength is reduced. Therefore, the range of 70 to 85% by weight is optimal.

Regarding the orientation angle of the inorganic long fibers with respect to the shaving direction, if the angle is less than 10 degrees with respect to the polishing direction, the rate of increase in the outer peripheral length on the front end side of the fiber end face acting on the material to be polished is small. 5 degrees or more is desirable. The optimum range is 17.5 degrees to 45 degrees in order to maintain the elastic modulus in the longitudinal direction and the difficulty of breaking and to obtain the effect of biting the polished surface. If the angle exceeds 45 degrees, the strength and the elastic modulus in the polishing direction are greatly reduced, which is not suitable for practical use.

[0012]

Next, examples of the wrapping material of the present invention will be described. (Example 1) First, the following resin composition was prepared as the resin composition: 100 parts of an epoxy resin (DER383J Dow Chemical Japan) 80 parts of tetrahydromethyl phthalic anhydride (HN2200 Hitachi Chemical) 80 parts of imidazole (2E4MZ-CN Shikoku Chemical) In the resin tank containing the above resin composition, the fiber diameter is 40 μm.
The resin composition was impregnated by passing 24 alumina fibers of 2000 TEX in which 500 of the above alumina fibers were aligned, and the resin composition was impregnated into a cylinder having a fiber diameter of 106 mm by 70.5 mm with respect to one circumference in the circumferential direction, and 282 mm. After reciprocating 6 times in a parallel winding (parallel winding) in the width of 5 mm, this was cut open in the axial direction to form a sheet. This sheet formed a sheet in which alumina fiber layers inclined 12.5 degrees rightward with respect to the circumferential direction and alumina fiber layers inclined 12.5 degrees leftward alternately with respect to the circumferential direction.

The two sheets thus prepared are cut into a length of 320 mm in the circumferential direction, and the two sheets are stacked in the same direction, and are heated to 120 degrees and 330 mm × 300 m.
m, and pressurized at a pressure of 100 kg / cm ² , taken out one hour later, and produced a plate having a thickness of 10.1 mm. A test piece was cut out from this plate, and the content of the fiber was measured to be 82.5% by weight.

Further, a square bar having a width of 10 mm was cut out from the plate in the circumferential direction, and it was cut sideways and cut to a width of 1 mm to prepare a stick having a width of 10 mm, a thickness of 1 mm and a length of 100 mm. This stick consists of a layer of fibers aligned to the right at 12.5 degrees to the length direction and a layer of fibers aligned to the left at 12.5 degrees in parallel to the length direction, parallel to the 10 mm wide surface. To form a stick with fibers oriented in two directions. This stick and a stick in which the fibers having the same fiber diameter of 40 μm as in the example in the length direction were used and the fibers were aligned only in one direction (the fiber content was 8
3% by weight), the S45C steel mold was polished, and the stick in this example having a two-way shed was more polished than the fiber stick aligned in one direction. A good polished surface with remarkably excellent biting and sharpening properties, no side slip during polishing, and no linear flaws was obtained. In contrast, the stick, in which the fibers were aligned in only one direction, was vulnerable to twisting and easily cracked vertically when twisted. Further, instead of the stick of the above-described embodiment and the fiber having a fiber diameter of 40 μm of the embodiment, a fiber diameter of 5 μm was used.
Using a stick (fiber content 84% by weight) in which fibers are aligned in only one direction using 0 μm fibers,
A comparison of the abrasion with a steel mold of 45C showed that the fiber diameter of the example was 40 μm in terms of the biting property on the polished surface.
The stick made by shaving the twill using the above-mentioned fiber had almost the same biting property to the mold as the stick made by drawing fibers having a fiber diameter of 50 μm in only one direction.
That is, by shaving the twill, a fiber having a fiber diameter of 40 μm was able to be obtained by preparing fibers having a fiber diameter of 50 μm only in one direction and producing the same biting property as a stick.

Example 2 In a resin tank containing the same resin composition as in Example 1, 5 alumina fibers having a fiber diameter of 40 μm were placed.
The resin composition was impregnated by passing one through 2000 alumina fibers of 2000 TEX, and the fiber was impregnated with a fiber diameter of 106.
mm was wound by a filament winding machine in a helical winding at an angle of 21.6 degrees with respect to the circumferential direction. 5.875mm for one round trip
It was designed such that the next fiber bundle was wound next to the previously wound fiber bundle in one reciprocation. In this way, the molding material wound up and reciprocated 392 in a width of 282 mm was cut open in the axial direction of the cylinder to form a sheet.

The two sheets prepared in this manner were cut into a length of 320 mm in the circumferential direction, and the two sheets were stacked in the same direction and heated to 120 ° C. and heated to 330 mm × 300 mm.
Was pressed at a pressure of 100 kg / cm ² , taken out after one hour, and a plate having a thickness of 6.5 mm was prepared. A test piece was cut out from this plate, and the content of the fiber was measured to be 82.0% by weight.

Further, a square bar having a width of 10 mm was cut out from the plate in the circumferential direction, and this was cut sideways and cut to a width of 1 mm to prepare a stick having a width of 10 mm, a thickness of 1 mm and a length of 100 mm. This stick is 2 parallel to the plane of 10 mm width to the length direction and rightward to the length direction.
The fiber bundle oriented at 1.6 ° and the fiber bundle oriented at 21.6 ° to the left overlapped with each other to form a stick with fibers oriented in two directions. Using this stick and a stick whose fibers are aligned only in one direction in the length direction,
When the steel mold of S45C was polished, as in Example 1, the stick with the traverse in these two directions also had better biting and shaving properties on the surface to be polished than the fiber stick aligned in one direction. Was remarkably excellent, and the sticking property of the stick of Example 2 was superior to that of the stick of Example 1. This is considered to be due to the large traverse angle of the second embodiment. Also, a good polished surface free of vertical cracks when twisted and free of linear flaws was obtained. In contrast, the stick, in which the fibers were aligned in only one direction, was vulnerable to twisting and easily cracked vertically when twisted.

[0018]

According to the wrapping material of the present invention, grinding,
Since the fibers are oriented in two directions with respect to the polishing direction, the stick is not twisted in one direction during grinding and polishing. Further, compared to a stick in which fibers are oriented only in one direction, a vertical crack is less likely to occur when the stick is twisted. In addition, by orienting the fibers in two directions symmetrical to the grinding and polishing directions, each fiber has an elliptical fiber end face having a major axis in a direction orthogonal to the polishing direction. The outer peripheral edge on the front end side of the fiber end face acting on the abrasive becomes longer, and the grinding and polishing efficiency increases.
Moreover, there is no side slip at the time of grinding and polishing, the efficiency of precision polishing is increased, the biting of the workpiece at the time of grinding and polishing is improved, and the grinding and polishing efficiency is increased. Further, according to the method for producing a wrapping material of the present invention, an inorganic long fiber is wrapped around a cylinder at an arbitrary angle with respect to a cylinder, in any winding manner, and a wrapping material having a desired elliptical fiber end is obtained. It can be easily manufactured.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a manufacturing process of a wrapping material of the present invention.

FIG. 2 is a schematic view of an end face of the wrapping material of the present invention.

FIG. 3 is a schematic view of an end face of a conventional wrapping material.

[Explanation of symbols]

 Reference Signs List 1 inorganic long fiber (single fiber) 1a outer peripheral edge 11 fiber bundle 20 block material 21 stick

Claims (9)

[Claims] 1. A wrapping material comprising a flat molded body obtained by impregnating an inorganic long fiber with a thermosetting resin, wherein the inorganic long fiber is oriented in two directions symmetrical with respect to a polishing direction. Wood. 2. The method according to claim 1, wherein the inorganic long fibers are polished in a polishing direction of 10 mm.
The wrapping material according to claim 1, wherein the wrapping material is oriented in two symmetrical directions at an angle of ~ 45 degrees. 3. The method according to claim 1, wherein the inorganic filaments are polished in a polishing direction.
The wrapping material according to claim 2, wherein the wrapping material is oriented in two symmetrical directions at an angle of 2.5 to 45 degrees. 4. The wrapping material according to claim 1, wherein the inorganic long fibers are oriented by traversing in two directions symmetric with respect to a polishing direction. 5. An inorganic long fiber selected from the group consisting of glass fiber, alumina fiber, silicon carbide fiber, boron fiber and silicon nitride fiber. 5. The wrapping material according to any one of items 1 to 4. 6. The wrapping material according to claim 1, wherein the inorganic long fiber is contained in an amount of 70 to 85% by weight. 7. An inorganic long fiber impregnated with a thermosetting resin is wound around an outer periphery of the rotating body while being traversed along the rotation direction of the rotating body, and the molding material wound on the rotating body is rotated by an axis of the rotating body. Cut in the direction, cut open, spread in a sheet form, and if necessary, laminate a plurality of sheets, and cure by heating and pressing to create a wrapping material block, and the traversed surface side of this block is used when wrapping. A method for producing a wrapping material, comprising slicing into a flat plate so as to be on a flat surface side. 8. The method for producing a wrapping material according to claim 7, wherein said traverse is a parallel winding. 9. The wrapping material manufacturing method according to claim 7, wherein said traverse is helical winding.