Grinding wheel available for cutting and grinding

Abstract

 The present invention relates to a grinding wheel available for cutting and grinding, having a protruding part formed to be folded at a center of a circular plate, the protruding part having a connecting hole at its center, the circular plate having a plurality of through holes and a plurality of cutting edges around its circumference, the cutting edges being coated with diamond particles on their outer surfaces to form a cutting diamond coating layer, the circular plate being coated with diamond particles on its both sides to form a grinding diamond coating layer.
The present invention is available for cutting and grinding an object, disperses force during the cutting and grinding, and maximizes effect of discharging chips and dispersing heat, thereby maximizing cutting and grinding effect and lengthening a life of the grinding wheel. The present invention also allows the grinding wheel to work in both straight and curve lines and to finely process both sides of cutting surface of the object due to the diamond coating layer. This diamond coating layer makes it possible to reduce load on the object, thereby lengthening the life of the grinding wheel.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

[0001] The present invention relates to a grinding wheel available for cutting and grinding and more particularly to a grinding wheel for dispersing a force and maximizing efficiency in discharging chips and dispersing heat during cutting and grinding of an object, thereby maximizing cutting and grinding effect and lengthening a life of the device.

2. Description of Related Art

[0002] In a typical conventional grinding wheel, diamond particles and grindstone particles are solidified by a caking additive and used as an abrasive. In the conventional technique, individual grinding wheels are separately used as a surface polishing grinding wheel for leveling the surface of an object and as a cutting grinding wheel for cutting the object. This causes the following problems.

[0003] First, the separate surface polishing and cutting grinding wheels should be displaced whenever necessary according to cutting and grinding works while performing abrasive work, thereby decreasing work efficiency.

[0004] Second, the grinding wheel is worn as it is used for machining the object, thus making it difficult to continuously carry out precision polishing.

[0005] Third, the grinding wheel may be warped during the cutting, thus making it difficult to cut a thin layer sharp.

[0006] Fourth, the cutting surface of an object should be polished again with the separate surface polishing grinding wheel after cutting the object.

[0007] Finally, in case that the cutting work is not correctly performed in an initial stage, the wheel is removed from an object to restart the work since the grinding wheel cannot be corrected.

[0008] To solve these problems, this applicant filed a utility model application Ser. No. 19840 in 1994, that relates to a grinding wheel available for cutting and grinding, the wheel having a cutting saw edge at the outer circumference of a steel plate and being steadily coated with abrasive diamond particles on both top and bottom surfaces of the plate so as to cut and grind an object at the same time.

[0009] The above grinding wheel available for cutting and grinding comprises a folded protruding part at a center of the circular steel plate, a connecting hole at the center of the folded protruding part, and cutting saw edges along the outer circumference of the circular plate, the grinding wheel being steadily coated with abrasive diamond particles on its both surfaces.

[0010] The grinding wheel according to the filed application overcomes those defects described above on the cutting and grinding of an object. However, this grinding wheel decreases in effects of dispersing force and heat and discharging chips during the cutting and grinding, thereby decreasing cutting and grinding efficiency and shortening a life of the device.

SUMMARY OF THE INVENTION

[0011] Accordingly, the present invention is directed to a grinding wheel available for cutting and grinding that substantially obviates one or more of the limitations and disadvantages of the related art.

[0012] An objective of the present invention is to provide a grinding wheel for cutting and grinding objects, maximizing cutting and grinding effects, and lengthening a life of the device.

[0013] Another object of the present invention is to provide a grinding wheel available for cutting and grinding, wherein a cutting area of a cutting edge is relatively wider, compared with a known cutting edge, and an angle of a reentrant part between cutting edges becomes larger by considering mechanical design of the grinding wheel, thereby greatly enhancing cutting and grinding effect with respect to marble, F.R.P, glass, hard plastic, epoxy, ceramic, and the like.

[0014] Additional features and advantages of the invention will be set forth in the following description, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure as illustrated in the written description and claims hereof, as well as the appended drawings.

[0015] To achieve these and other advantages, and in accordance with the purpose of the present invention as embodied and broadly described, a grinding wheel available for cutting and grinding, has a protruding part formed to be folded at a center of a circular plate, the protruding part having a connecting hole at its center, the circular plate having a plurality of through holes and a plurality of cutting edges around its circumference, the cutting edges being coated with diamond particles on their outer surfaces to form a cutting diamond coating layer, the circular plate being coated with diamond particles on its both sides to form a grinding diamond coating layer.

[0016] The cutting edges of the circular plate, each comprises a front side, a rear side, and a circumferential side, the front side being slant at an acute interior angle, the circumferential side being in the form of an arc, the cutting edge being 6∼22mm in length and 2.5∼12.6mm in height, a reentrant part between the cutting edges having an interior angle of 20∼60□, the grinding diamond coating layer on the top surface of the plate consisting of plural unit circular coating layers, the through hole and unit circular coating layer being formed to have a diameter of 2∼12mm, the unit circular coating layers being spaced out 2mm.

[0017] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

BRIEF DESCRIPTION OF THE ATTACHED DRAWINGS

[0018] The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

[0019] In the drawings:

FIG. 1 is a plan view of a grinding wheel according to the present invention;

FIG. 2 is a bottom plan view of a grinding wheel according to the present invention;

FIG. 3 is a partial sectional elevation of a grinding wheel according to the present invention; and

FIG. 4 is a descriptive view showing an exemplary method of using a grinding wheel according to the present invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT

[0020] With reference to the accompanying drawings, the present invention will now be described in detail.

[0021] FIG. 1 is a plan view of a grinding wheel according to the present invention. FIG. 2 is a partial sectional elevation of a grinding wheel according to the present invention. FIG. 3 is a descriptive view showing an exemplary method of using a grinding wheel according to the present invention. FIG. 4 is a descriptive view showing an exemplary method of using a grinding wheel according to the present invention. As shown in the drawings, a protruding part 2 is formed to be folded at the center of a circular plate 1. The protruding part 2 has a connecting hole 3 at its center. A plurality of through holes 5 are formed on the circular plate 1. A plurality of cutting edges 4 are formed along a circumference of the circular plate 1. Diamond particles are attached to outer faces of the cutting edges 4, forming a cutting diamond coating layer 6 and to the top surface of the circular plate 1, forming a grinding diamond coating layer 7.

[0022] The cutting edge 4 of the circular plate 1 comprises a front side 4a, a rear side 4b, and a circumferential side 4c. The front side 4a is slant at an acute interior angle θ. The rear side 4b is straight at a right angle. The circumferential side 4c is in the form of an arc. The cutting edge 4 is 6∼22mm in length and 2.5∼12.6mm in height. A reentrant part 8 between the cutting edges 4 of the circular plate 1 has an interior angle α of 20∼60□.

[0023] Each through hole 5 on the circular plate 1 is shaped into a circle. The grinding diamond coating layer on the top surface of the plate consists of plural unit circular coating layers 7a. The through hole 5 and unit circular coating layer 7a are formed to have a diameter R of 2∼12mm. The unit circular coating layers 7a are spaced out 2mm.

[0024] For example, the cutting edge 4 is formed to be 14mm in length and 6mm in height. The interior angle α of the reentrant part 8 is set at 35□ and the through hole 5 and unit circular coating layer 7a on the circular plate 1 are formed to have a diameter of 2∼12mm.

[0025] A grinding diamond coating layer 7b on the bottom surface of the plate 1 is located at three or more places (at regular intervals of 120□ or less), extending from the arc of cutting edges 4 thus being integrated with the cutting diamond coating layer 6 toward the center of the plate 1.

[0026] The diamond coating layer 7b is tapered off as nearer to the center and is shaped into an arc at the end. The entire surface of the circular plate 1 may be coated with the grinding diamond coating layer 7b on the bottom surface. However, this causes problems in discharging chips. Therefore, it is preferable to form the grinding diamond coating layer 7b at regular intervals leaving some bottom space on the plate 1 not coated. In such manner, some parts not coated makes it possible to provide smooth chip discharge.

[0027] When used, the grinding wheel of the present invention is matched to a shift 11 of a hand grinder 10 with a locking member 12 as shown in FIG. 3.

[0028] When using the conventional grinding wheel, a cutting area is influenced by large force at cutting saw edges. On the other hand, the cutting edges 4 of the present invention realize wider cutting area, thereby dispersing the force to the cutting area when cutting an object using the grinding wheel according to the present invention. According to the present invention, an angle between the cutting edges 4 and its shape are defined based upon a rotational frequency and force of the grinding wheel obtained through dynamic calculations, thereby maximizing effect of dispersing heat of about 400∼600□C. Namely, setting the angle and depth as shown in FIG. 1 maximizes the cutting effect. The grinding wheel is set to turn in direction A as shown in FIG. 1, thereby lengthening of life of tools and grinding wheel.

[0029] Compared with the conventional techniques coating diamond powder onto the overall grinding wheel for grinding, the present invention forms the grinding diamond coating layer 7 as shown in FIG. 1 and FIG. 2, thereby maximizing effect of discharging chips and dispersing heat, making it possible to continuously perform the grinding work. The present invention also maintains an optimal state for dispersing heat and discharging chips even if the grinding wheel has been used for a long period time, thereby achieving grinding effect three to six times as higher as that in the conventional techniques.

[0030] According to the present invention, the grinding diamond coating layer is partially formed on the bottom surface of the grinding wheel. This leads to a difference in thickness of the grinding wheel, making it possible to change a grinding angle of the grinding wheel, thereby conveniently adjusting a work start point. This also minimizes load on the object, thereby speeding the work and lengthening the life of the grinding wheel. In addition, the present invention allows both cutting sides of the object to be fine processed.

[0031] As illustrated, the present invention is available for cutting and grinding an object, disperses force during the cutting and grinding, and maximizes effect of discharging chips and dispersing heat, thereby maximizing cutting and grinding effect and lengthening a life of the grinding wheel. The present invention also allows the grinding wheel to work in both straight and curve lines.

[0032] It will be apparent to those skilled in the art that various modifications and variations can be made in the grinding wheel available for cutting and grinding of the present invention without deviating from the spirit or scope of the invention. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. A grinding wheel available for cutting and grinding, having a protruding part formed to be folded at a center of a circular plate, said protruding part having a connecting hole at its center, said circular plate having a plurality of through holes and a plurality of cutting edges around its circumference, said cutting edges being coated with diamond particles on their outer surfaces to form a cutting diamond coating layer, said circular plate being coated with diamond particles on its both sides to form a grinding diamond coating layer.

2. The grinding wheel as claimed in claim 1, wherein said cutting edges of the circular plate, each comprises a front side, a rear side, and a circumferential side, said front side being slant at an acute interior angle, said circumferential side being in the form of an arc, said cutting edge being 6∼22mm in length and 2.5∼12.6mm in height, a reentrant part between said cutting edges having an interior angle of 20∼60□, said grinding diamond coating layer on the top surface of said plate consisting of plural unit circular coating layers, said through hole and unit circular coating layer being formed to have a diameter of 2∼12mm, said unit circular coating layers being spaced out 2mm, said grinding diamond coating layer on the bottom surface of said plate being located on some of said cutting edges and extending from an arc of each cutting edge toward the center of said circular plate, tapering off as closer to the center.

Drawing