JPH0550380A - Wet type elastic grinding tool - Google Patents

Abstract

PURPOSE:To prevent the reduction of grinding allowance by securing elastic grinding wheels to a rotary shaft inclined and with the outer circumferential surfaces of the grinding wheels parallel with the shaft center of the rotary shaft, and establishing a specified relationship among the inclination angle, the width in the direction of the grinding wheels and the shaft center, and the diameter of the grinding wheels in a mounted state. CONSTITUTION:A plurality of grinding wheels 10 are attached to a rotary shaft 2 at an angle of theta to the perpendicular plane to the shaft center of the rotary shaft 2. In addition, the outer circumferential surfaces of the elastic grinding wheels (hereinafter referred to grinding wheels) 10 are set to be parallel with the shaft center of the rotary shaft 2. Spacers 20 are provided among the grinding wheels 10. The relationship of theta>=max {arctan (A/D), arctan (B/D)} is set among the inclination angle theta, the width A in the direction of the shaft center of the grinding wheels 10, the width B in the direction of the shaft center of the spacer 20, and the diameter D the grinding wheels in a mounted state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding tool for wet grinding, and more particularly to an elastic grinding tool for performing wet grinding at a constant pressure.

[0002]

2. Description of the Related Art As a wet-grinding tool for wet-grinding a workpiece such as a stainless coil material at a constant pressure, an elastic tool for wet-grinding made of an elastic body is used. The stainless steel coil is a stainless steel thin plate material manufactured by rolling and wound into a roll while finishing the surface. At this time, if the scratches on the surface of the stainless steel caused by rolling or the like are not removed early, the scratches will expand with each step and will eventually become impossible to remove.
Therefore, at the time of this winding, a rotating grinding grindstone is brought into contact with the stainless thin plate material stretched by the winding force to remove the scratches on the surface of the stainless steel for surface finishing. Such surface grinding is performed by constant pressure grinding.

The constant pressure grinding is a method of performing grinding with a constant pressure for bringing the grinding wheel into contact with the workpiece, and is characterized in that a more precise finished surface can be obtained as compared with the constant cut grinding. .. An elastic grinding tool using a soft elastic material as a basic constituent material of an abrasive is often used for constant pressure grinding. In particular, when the work piece, for example, the above-mentioned stainless steel coil has a wide width, an elastic grinding tool having the same width as the work piece is used in order to uniformly and efficiently grind the wide work piece. Then, the surface finish is performed by wet grinding in which a grinding liquid is poured between the elastic grinding tool and the stainless thin plate for grinding.

[0004]

However, the inventors of the present invention feel that when wet-grinding a workpiece such as a stainless coil material using such an elastic grinding tool, the grinding fluid is caught and the grinding tool floats up. It was newly found that a phenomenon similar to the planing phenomenon occurs. Due to this phenomenon, the stock removal of grinding is reduced, and there is a problem that sufficient grinding cannot be performed.
This phenomenon was particularly noticeable when a wide work piece was wet-ground with a wide elastic grinding tool. Therefore, the present invention is intended to provide an elastic tool for wet grinding which can prevent such a phenomenon and can perform sufficient grinding without causing uncut residue.

[0005]

[Means for Solving the Problems] Therefore, claim 1 of the present application
In the invention according to, in order to solve the above problems, a plurality of substantially disk-shaped elastic grinding wheel is an elastic tool for wet grinding which is assembled to a rotary shaft with a spacer interposed therebetween, wherein the elastic grinding wheel is Is assembled from the surface perpendicular to the axis of the rotating shaft while being inclined, and the outer peripheral surface of the elastic grinding wheel is tilted by the same angle to form a cylindrical surface parallel to the axis of the rotating shaft. The inclination angle θ from the plane perpendicular to the axis of the rotating shaft is such that the width A of the elastic grinding wheel along the axial direction, the width B of the spacer along the axial direction, and the elastic grinding wheel are assembled. For the diameter D in the state, θ ≧ max {arctan (A / D), arcta
An elastic tool for wet grinding was created which has a relationship represented by n (B / D)}.

Furthermore, in this elastic tool for wet grinding, the inclination angle θ is θ ≧ arctan {(A + B) / D} for the width A, the width B and the diameter D.
It is more preferable to use the elastic tool for wet grinding according to claim 1 having a relationship represented by (corresponding to claim 2). The elastic abrasive material portion of the elastic grinding wheel is formed in a substantially disc shape by arranging thin abrasive materials radially in a radial direction of a circle and radially overlapping. The elastic tool for wet grinding is more preferable (corresponding to claim 3).

[0007]

According to the elastic tool for wet grinding according to the invention of claim 1 of the present application having the above-mentioned structure, a plurality of substantially disk-shaped elastic grinding wheels sandwich the spacer therebetween and the axis of the rotary shaft. By being installed so as to be inclined from the plane perpendicular to the center, a groove inclined with respect to the axis of the rotating shaft is formed on the outer peripheral surface of the elastic grinding stone. At the same time, the outer peripheral surface of the elastic grinding wheel is inclined by the same angle to form a cylindrical surface parallel to the axis of the rotary shaft, so that a grinding surface that comes into uniform contact with the workpiece can be obtained. The inclination angle θ of the elastic grinding wheel from the vertical plane with respect to the axis of the rotating shaft is such that the width A along the axial direction of the elastic grinding wheel, the width B along the axial direction of the spacer,
And the diameter D with the elastic grinding wheel assembled, θ ≧ max {arctan (A / D), arct
a (B / D)}. That is, if the tilt angle θ is arctan (A / D) and arctan
The angle is larger than any of (B / D).

As a result, the tilt angle θ is equal to arctan (A /
Since the size is D) or more, there is no portion in which only the elastic grinding wheel portion of the elastic tool for wet grinding abuts each portion along the axial direction of the workpiece. As a result, the grinding fluid during wet grinding is reliably released to the groove, so that a water film having an excessive thickness is not formed between the elastic grinding stone and the workpiece. As a result, it is possible to prevent the phenomenon that the grinding tool is lifted up due to a phenomenon similar to hydroplaning. Further, since the outer peripheral surface of the elastic grinding wheel comes into uniform contact with the entire surface of the workpiece, uniform grinding is performed. On the other hand, since the inclination angle θ is larger than arctan (B / D), there is no portion in which only the groove portion of the elastic tool for wet grinding abuts on each portion along the axial direction of the workpiece,
It is surely ground without leaving any uncut residue. In this way, a phenomenon similar to the hydroplaning phenomenon can be prevented, sufficient grinding can be performed, and an elastic tool for wet grinding can be surely ground without causing uncut residue.

According to the elastic tool for wet grinding of the second aspect, the inclination angle θ of the elastic grinding wheel has a width A along the axial direction of the elastic grinding wheel, a width B along the axial direction of the spacer,
Regarding the diameter D of the elastic tool for wet grinding, θ ≧ arcta
Because of the relationship represented by n {(A + B) / D}, the ratio of the groove portion that abuts against the work piece per one revolution of the elastic tool for wet grinding is determined by each portion along the axial direction of the work piece. Will be about uniform. Therefore, the degree of grinding becomes uniform and the grinding is completed in a short time. Further, according to the elastic tool for wet grinding according to claim 3, the elastic abrasive material portion of the elastic grinding wheel is formed in a substantially disc shape by radially superimposing a thin abrasive material around the rotary shaft. Therefore, the elastic tool for wet grinding is excellent in elasticity and has a uniform ground surface (outer peripheral surface). Therefore, a more precise and uniform ground finished surface can be obtained.

[0010]

[Embodiment] Next, an embodiment embodying the present invention will be described.
This will be described with reference to FIGS. 1 and 2. FIG. 1 is a sectional view showing an embodiment of the elastic tool for wet grinding of the present invention. Reference numeral 1 is an elastic tool for wet grinding, and the elastic tool 1 for wet grinding is formed around a rotary shaft 2. When performing grinding, the rotary shaft 2 is fixed to the rotary main shaft of the grinding machine, and the elastic tool 1 for wet grinding rotates as a whole. A plurality of elastic grinding wheels 10 are attached to the rotary shaft 2.
The elastic grinding wheel 10 has an elastic grinding material 1 on a ring-shaped substrate 14.
2 is fixed, and the elastic grinding wheel 10 is attached by the through hole of the ring-shaped substrate 14 penetrating the rotating shaft 2. Spacers 20 are sandwiched between the plurality of elastic grinding wheels 10. Similar to the ring-shaped substrate 14, the spacer 20 is also provided with a through hole that fits into the rotary shaft 2, and by penetrating the rotary shaft 2, the spacer 20 and the elastic grinding wheel 10 are alternately mounted.

The plurality of attached elastic grinding wheels 10 are pressed by a pair of metal inclined plates 8 at both ends thereof. This inclined plate 8 is formed so that only one end surface is inclined by the same angle as the inclination angle θ of the elastic grinding wheel 10 described later. Further, the pair of inclined plates 8 are pressed by the pair of flanges 6 on the outside thereof. The flange 6 is clamped and fixed to the end of the rotary shaft 2 by a bolt 4. Here, both end surfaces of each of the elastic grinding wheel 10 and the spacer 20 are prefabricated by an angle θ with respect to the outer peripheral surface of the elastic grinding wheel 10, the through hole of the ring-shaped substrate 14, and the through hole of the spacer 20. Has been done. As a result, when the elastic grinding wheel 10 and the spacer 20 are attached to the rotating shaft 2, both end surfaces of the elastic grinding wheel 10 and the spacer 20 are fixed at an angle θ with respect to the vertical surface with respect to the rotating shaft 2. On the other hand, since the outer peripheral surface of the elastic grinding wheel 10 is manufactured in parallel to the inner surface of the through hole of the ring-shaped substrate 14, the outer peripheral surface of the elastic grinding wheel 10 in the state of being attached to the rotary shaft 2 is: It is parallel to the axis of the rotary shaft 2.

As described above, since the plurality of substantially disk-shaped elastic grinding wheels 10 are assembled with the plurality of spacers 20 sandwiched therebetween from the plane perpendicular to the rotary shaft 2, the elastic tool 1 for wet grinding is used. A groove inclined with respect to the rotating shaft 2 is formed on the outer peripheral surface of the. Here, the elastic grinding material 12 portion of the elastic grinding wheel 10 is formed by arranging thin grinding materials in which a layer of grinding abrasive grains is formed on a sheet-shaped thin base material in the radial direction of a circle and radially overlapping them. It is formed in a disk shape. In addition, the shape of the thin abrasive is thin at the center of the disc and thick at the outer periphery of the disc, and by combining several types of abrasives with different thickness distributions, it is possible to bond the abrasives without sticking them together. The parts also adhere to each other and a fine ground surface is obtained.

Accordingly, the elastic tool for wet grinding 1 constitutes an elastic tool for wet grinding in which a plurality of substantially disk-shaped elastic grinding stones are assembled on a rotary shaft with a spacer interposed therebetween.
Further, the elastic grinding wheel 10 constitutes an elastic grinding wheel that is installed so as to be tilted from a plane perpendicular to the axis of the rotary shaft 2. Further, the elastic abrasive material portion 12 of the elastic grinding wheel 10
Is formed in a substantially disc shape by arranging thin abrasives in a radial direction of a circle and radially overlapping them.

Here, the inclination angle θ of the elastic grinding wheel 10 from the vertical plane with respect to the axis of the rotary shaft 2 is the elastic grinding wheel 10.
Of the axial width A of the spacer 20, the axial width B of the spacer 20 and the diameter D with the elastic grinding wheel 10 assembled, θ ≧ max {arctan (A /
D), arctan (B / D)}, the uniform grinding is performed.

That is, the tilt angle θ is equal to arctan (A /
Since the size is D) or more, there is no portion where only the elastic grinding wheel portion 10 of the elastic tool 1 for wet grinding abuts each portion along the axial direction of the workpiece. This ensures that the grinding fluid during the wet grinding is in the groove (spacer) portion 20.
Therefore, a water film having an unnecessarily large thickness is not formed between the outer peripheral surface of the elastic grinding wheel 10 and the workpiece. As a result, it is possible to prevent the phenomenon that the grinding tool 1 is lifted up due to a phenomenon similar to hydroplaning. Then, since the outer peripheral surface of the elastic grinding wheel 10 abuts uniformly on the entire surface of the workpiece, uniform grinding is performed. On the other hand, the tilt angle θ
Is larger than arctan (B / D), there is no portion in which only the groove portion 20 of the elastic tool 1 for wet grinding abuts with respect to each portion along the axial direction of the workpiece, and reliable and uniform grinding is performed. In this way, a phenomenon similar to the hydroplaning phenomenon is prevented, sufficient grinding is performed, and an elastic tool for wet grinding that can perform uniform grinding is obtained.

Most preferably, the elastic grinding wheel 1
The inclination angle θ of 0 is about the width A, the width B, and the diameter D.
The relationship is represented by θ ≧ arctan {(A + B) / D}. Elastic tool 1 for wet grinding shown in FIG.
In the above, the inclination angle θ is θ = arctan with respect to the width A along the axial direction of the elastic grinding wheel 10, the width B along the axial direction of the spacer 20, and the diameter D of the elastic tool 1 for wet grinding.
Since the relationship is represented by {(A + B) / D}, the above condition is satisfied, and the degree of grinding in the axial direction becomes more uniform as will be described in detail below.

It will be described with reference to FIG. 2 that the distribution of the grinding state in the axial direction becomes more uniform with the elastic tool 1 for wet grinding having such a structure. FIG. 2 is an explanatory diagram showing a locus of grinding of the elastic tool 1 for wet grinding according to the present embodiment. In the figure, the horizontal axis represents the axial distribution of the outer peripheral surface of the elastic grinding wheel 10, and the vertical axis represents the rotation angle of the elastic tool 1 for wet grinding. That is, π on the vertical axis represents 1/2 rotation of the elastic tool 1 for wet grinding, and 2π on the vertical axis represents one rotation of the elastic tool 1 for wet grinding. In this way, the elastic grinding wheel 10 is used when the elastic tool 1 for wet grinding is ground.
The locus of the boundary line between the groove 20 and the groove (spacer) 20 has a cosine waveform.

Here, the inclination angle θ of the elastic grinding wheel 10 is, as described above, the width A along the axial direction of the elastic grinding wheel 10, the width B along the axial direction of the spacer 20, and the wet grinding. For the diameter D of the elastic tool 1, θ = arctan
The relationship is {(A + B) / D}. Therefore, the locus of the boundary line between the elastic grinding wheel 10 and the groove (spacer) 20 is shown in FIG.
become that way. In this case, the total distance that the straight line along the vertical axis in FIG. 2 passes through the hatched portion in FIG. It corresponds to the length of grinding by the elastic grinding wheel 10 per one rotation. As can be seen from FIG. 2, θ =
In the case of the elastic tool 1 for wet grinding under the condition of arctan {(A + B) / D}, the distance passing through the hatched portion on the straight line perpendicular to the vertical axis is approximately equal at any position on the horizontal axis. Therefore, the ratio of the groove portions that come into contact with the workpiece per one revolution of the elastic tool 1 for wet grinding becomes substantially uniform in each portion along the axial direction of the workpiece, so that more uniform grinding is performed, Grinding can be completed in a short time.

A method of wet grinding using the elastic tool for wet grinding having the above structure will be described below. Here, the case of grinding the above-mentioned stainless steel coil material will be described. First, the rotary shaft 2 of the elastic tool 1 for wet grinding assembled as shown in FIG. 1 is fixed to the rotary main shaft of the grinding machine. Then, the elastic tool 1 for wet grinding is rotated and brought into contact with the stainless thin plate material stretched by the winding force. At the same time, a grinding liquid is poured between the elastic tool 1 for wet grinding and the stainless thin plate to perform grinding. At this time, the grinding ability changes depending on the flow rate of the grinding liquid. That is, when the same elastic tool is used, the higher the flow rate of the grinding fluid, the lower the grinding ability.

Specifically, when a 90 mm wide elastic tool for wet grinding is used, in the conventional elastic tool for wet grinding having no groove, the grinding allowance of the stainless thin plate is 6 μm when the flow rate of the grinding fluid is high. Less. On the other hand, when the flow rate of the grinding fluid is reduced, the grinding allowance is improved to 15 μm. From this, it is presumed that in wet grinding of a stainless steel thin plate using an elastic grinding tool, a phenomenon similar to the hydroplaning phenomenon of an automobile occurs, in which the grinding fluid is taken up and the grinding tool floats up. ..

On the other hand, when the elastic tool 1 for wet grinding provided with the inclined groove according to the present invention is used, it is also 90
With a width of mm, a grinding allowance of 35 μm can be obtained when the flow rate of the grinding fluid is reduced. That is, when the elastic tool 1 for wet grinding according to the present embodiment is used, the grinding fluid is released into the groove, and as a result, a water film having an excessive thickness is not formed between the elastic grinding wheel and the workpiece. The phenomenon similar to hydroplaning that the grinding tool floats up is prevented. At the same time, for each part along the axial direction of the workpiece, there is no part in which only the groove part comes into contact with the wet-grinding tool, and reliable grinding is performed. In this way, a phenomenon similar to the hydroplaning phenomenon is prevented, sufficient grinding is performed, and uniform grinding is performed.

In this embodiment, as the elastic grinding wheel 10, an elastic grinding wheel in which the elastic grinding material 12 is fixed on the ring-shaped substrate 14 is used, but other shapes can be used. Further, the example in which the elastic abrasive 12 in which thin abrasives are radially overlapped around the rotary shaft 2 is used has been described, but an elastic abrasive made of another material may be used. The structure of the other parts of the elastic tool for wet grinding and the width, outer diameter, material, number, etc. of the elastic grinding wheel or spacer are not limited to those in this embodiment.

Further, as an effect peculiar to this embodiment, the inclination angle θ of the elastic grinding wheel 10 is such that the width A along the axial direction of the elastic grinding wheel 10, the width B along the axial direction of the spacer 20, the wet grinding. For the diameter D of the elastic tool 1, θ = arcta
Since the relationship is represented by n {(A + B) / D}, there is an advantage that the degree of grinding along the axial direction becomes more uniform and the grinding is completed in a short time. Also, the elastic grinding wheel 10
As the elastic abrasive material portion 12, the elastic abrasive material formed by arranging thin abrasive materials in the radial direction of the circle and radially overlapping them to form a substantially disk shape is used. ) Becomes a uniform elastic tool for wet grinding.
Therefore, there is an effect that a more precise and uniform ground finished surface can be obtained.

[0024]

According to the present invention, an inclined groove is formed on the outer peripheral surface of the elastic grinding wheel, and the elastic grinding wheel portion and the groove portion are alternately contacted with each other at any axial portion for wet grinding. Since the elastic tool is created, a phenomenon similar to the hydroplaning phenomenon occurs and the grinding tool is prevented from being lifted up, and the grinding is surely performed without causing uncut residue. Therefore, the elastic tool for wet grinding is extremely excellent in practicality. Further, as a spillover effect of the present invention, the surface area of the elastic grinding wheel is increased due to the formation of the grooves, and the grinding liquid released to these grooves also cools the side surfaces of the grooves, so that the heat of the elastic grinding wheel is increased. The effect of improving the emission is also obtained, and the elastic tool for wet grinding has extremely excellent practicality.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an elastic tool for wet grinding of the present invention.

FIG. 2 is an explanatory diagram showing a trajectory of grinding of an elastic tool for wet grinding.

[Explanation of symbols]

 1 Elastic Tool for Wet Grinding 2 Rotating Shaft 10 Elastic Grinding Wheel 20 Spacer 12 Elastic Abrasive Material Part

Claims (3)

[Claims] 1. An elastic tool for wet grinding, comprising a plurality of substantially disk-shaped elastic grinding wheels mounted on a rotary shaft with a spacer interposed therebetween, wherein the elastic grinding wheels have an axial center of the rotary shaft. And the outer peripheral surface of the elastic grinding wheel is tilted by the same angle and is a cylindrical surface parallel to the axis of the rotating shaft, and is assembled with respect to the axis of the rotating shaft of the elastic grinding wheel. The inclination angle θ from the vertical plane is about the width A along the axial direction of the elastic grinding wheel, the width B along the axial direction of the spacer, and the diameter D in the state where the elastic grinding wheel is assembled. θ
≧ max {arctan (A / D), arctan (B
/ D)}, the elastic tool for wet grinding is characterized by the following relationship. 2. The inclination angle θ is the width A, the width B,
And for the diameter D, θ ≧ arctan {(A +
The elastic tool for wet grinding according to claim 1, having a relationship represented by B) / D}. 3. The elastic abrasive material portion of the elastic grinding wheel is formed into a substantially disc shape by arranging thin abrasive materials in a radial direction of a circle and radially overlapping them. The elastic tool for wet grinding according to 2.