JP2001150356A - Mirror finish grinding wheel for grinder and mirror finish grinding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mirror finish grinding wheel and a mirror finish grinding method capable of comparatively easily and completely executing the mirror finish work to a corner of a work with a simple structure. SOLUTION: This grinding wheel has a conical outer peripheral surface 11 inclined to a machined surface 21 at a predetermined conic angle (θ1), a conical inner peripheral surface 12 is formed with a predetermined thickness to the conical outer peripheral surface 11, and a working surface 13 having a clearance angle (θ2) to the machined surface 21 of a work 20 is formed from the conical outer peripheral surface 22 to the conical inner peripheral surface 12 at a circumferential end surface of a tapered side, whereby providing the very easy mirror finish grinding to the end surface of the work having a corner of a groove and a sidewall. As a corner of a grinding wheel has an acute angle, it can be used for a corner where the machined surface and the sidewall are intersected, and a sharp corner can be formed on such a place. Further the working accuracy can be improved and a working time can be shortened without producing the waviness, a small broken or the like on the machined surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mirror grinding machine for polishing a finished surface of a work to a mirror surface state and mirror-finished a finished surface including an angle formed between an end surface and a side wall intersecting one of the finished surfaces. The present invention relates to a whetstone and a mirror grinding method.

[0002]

2. Description of the Related Art Conventionally, many grinding devices have been widely used for finishing a surface of a work to a mirror surface state, and various grinding devices are used according to the application. In addition, these grinding devices are capable of performing a grinding process in accordance with the hardness of the material constituting the work by appropriately changing the grinding wheel used for the work according to the hardness of the work. By changing the direction in which the work of the grinding device is fixed or the direction in which the work table is moved, the shape of the grinding machine can be flexibly handled. On the other hand, as another processing method for finishing the finished surface of the work into a mirror surface state, as shown in FIG. 5, a finished surface 121 of a work 120 fixed to a work table of a grinding device is used.
Using polishing powder 130 such as diamond powder, and interposing this between the finished surface 121 and the rotating disc 131,
A so-called lapping method for finishing the work 120 into a mirror surface by rotating the rotating disk 131 is also used.

[0003]

However, even with these grinding devices and grinding wheels, the grinding process for finishing the corners of the grooves and the end surfaces of the workpieces having the side walls into a mirror-like state is required for the grinding process. If the grindstone does not enter or the grinding surface of the normal grinding wheel is close to the side wall, it can be machined only to the shape of the corner of the grinding wheel, that is, the grinding wheel has a corner Since the work had a slight roundness, the corner of the work was inevitably rounded, and a sharp corner could not be obtained. In the lapping process, if the entire finished surface of the work is flat, it is possible to machine the entire surface into a mirror surface without any problem.However, machining of a portion having a finished surface with grooves and side walls may enter the groove. There is a limit in processing because it cannot be used or cannot be used for the side wall. In particular, when performing mirror finishing on the side wall of a narrow groove, there are problems that lapping cannot be performed and effective mirror finishing cannot be obtained.

A first object of the present invention is to solve the above-mentioned problems and to obtain a mirror-grinding whetstone which is capable of relatively evenly mirror-finishing a corner of a work with a simple structure. In addition, a second object of the present invention is to provide a mirror surface grinding method capable of mirror processing even a relatively narrow groove.

[0005]

SUMMARY OF THE INVENTION A first object of the present invention is to:
In a grinding device that mirror-finishes the finished surface 21 and the corner between the finished surface 21 and the side wall 22 by applying the grinding wheel 1 to the finished surface 21 of the work 20, a predetermined angle with respect to the finished surface 21 of the work 20 is provided. It has a conical outer peripheral surface 11 inclined at a conical angle (θ1), and forms a conical inner peripheral surface 12 on the inner side while maintaining a predetermined thickness from the conical outer peripheral surface 11, while forming a conical inner peripheral surface on the flared end side. This is achieved by providing a mirror-grinding grindstone in which an operating surface 13 having a clearance angle (θ2) from the conical outer peripheral surface 11 to the conical inner peripheral surface 12 with respect to the finished surface 21 of the work 20 is formed. This object is also achieved by providing a mirror grinding wheel having an acute angle between the conical outer peripheral surface 11 and the working surface 13 and having a relationship of 90 °>θ1> θ2.

Further, a second object of the present invention is to provide a work 20
Has a conical outer peripheral surface 11 inclined at a predetermined conical angle (θ1) with respect to the finished surface 21, and forms a conical inner peripheral surface 12 on the inner side while maintaining a predetermined thickness from the conical outer peripheral surface 11. On the other hand, the grinding wheel 1 having a working surface 13 having a clearance angle (θ2) with respect to the finished surface 21 of the work 20 from the conical outer peripheral surface 11 to the conical inner peripheral surface 12 is formed on the circumferential end surface on the divergent side. This is achieved by providing a mirror surface grinding method for grinding the finished surface 21 of the work 20 to a mirror surface state.

[0007]

FIG. 1 is a block diagram showing an embodiment of the present invention.
4 through FIG. 1 and 2, 1
Is a grinding wheel fixed so as to be rotationally driven by a rotating portion (not shown) of a grinding device (not shown), and a fixed portion 2 for the grinding device is provided on an upper portion. The fixing portion 2 has a ring shape made of an alloy.
Has a grinding stone layer portion 10 formed in a conical shape containing abrasive grains.
Are integrally fixed. The grindstone layer portion 10 has a truncated cone shape including a conical outer peripheral surface 11 and a conical inner peripheral surface 12 formed inside the conical outer peripheral surface 11 with a predetermined thickness.

[0008] The conical outer peripheral surface 11 is inclined at a predetermined angle with the outer peripheral edge of the working surface 13 which is a divergent end surface thereof, that is, at a conical angle (θ1) with respect to the finished surface 21 of the work 20. On the other hand, the working surface 3 formed on the circumferential end surface on the divergent side is different from the conical outer peripheral surface 11 to the conical inner peripheral surface 1.
2 and has a predetermined clearance angle (θ2) with respect to the finished surface 21 of the work 20. If the clearance angle (θ2) is large, the angle formed by the conical outer peripheral surface 11 and the working surface 13 becomes small, and thereby the wear of the grinding wheel 1 is accelerated or chipped. Therefore, the clearance angle (θ2) is as small as possible. The angle formed between the outer peripheral surface 11 of the cone and the acting surface 13 intersecting with the cone is formed at an acute angle, and the angle between θ1 and θ2 is 90 °> θ1.
> Θ2. Due to such an angular relationship, it is possible to grind the corner of the side wall 22 of the work 20 with the grinding wheel 1.

An L-shaped workpiece 20 as shown in FIG.
When the finished surface 21 is mirror-finished, a relief groove 23 is formed at the boundary between the finished surface 21 and the side wall 22 of the work 20 in advance so that a part of the outer peripheral edge of the grinding wheel 1 enters the work 20. . Subsequently, the work 20 having the relief groove 23 formed as described above is mounted on a work table (not shown) of the grinding device, and the grinding wheel 1 is applied to the finished surface 21 of the work 20 by a predetermined amount. 4, the workpiece 20 or the grinding wheel 1 is reciprocated so as to be parallel to the clearance groove 23 of the workpiece 20 as shown in FIG.

As a result, the finishing surface 21 of the work 20 is ground by the working surface 13 of the divergent circumferential end surface of the grinding wheel 1 to be in a mirror surface state. When the grinding process is repeated as described above and reaches the boundary between the finished surface 21 and the side wall 22, the circumferential edge of the grinding wheel 1 slightly enters the clearance groove 23, and the grinding process is performed. For this reason, the working surface 13 makes the finished surface 2
Mirror finish processing is performed up to the boundary between 1 and the side wall 22. Although the mirror-finished finished surface 21 is not shown, even if it is formed on a groove-shaped bottom surface having side walls on both sides, the grinding wheel 1 having such a shape is formed to have a size within the width of the groove. However, accurate mirror finishing can be obtained by using this grinding wheel 1. Furthermore,
When the side wall of the groove narrower than the grinding wheel 1 is to be mirror-finished, the outer peripheral edge of the grinding wheel 1 can enter the side wall of the groove of the work (not shown) at a predetermined angle. Mirror processing on the side wall of the narrow groove becomes easy.

The work 20 in this embodiment forms a relief groove 23 having a slight width at the boundary between the finished surface 21 and the side wall 22, into which the outer peripheral edge of the grinding wheel 1 enters. However, even if the relief groove 23 is not necessarily formed, the outer peripheral edge of the grinding wheel 1 is always formed at an acute angle, so that the edge of the finished surface 21 may be rounded. Instead, a sharp corner is formed, and the number of processing steps can be reduced.

[0012]

As is apparent from the above-described embodiment, the present invention has a conical outer peripheral surface 11 inclined at a conical angle (θ1) of a predetermined angle with respect to the finished surface 21 of the work 20. The inner peripheral surface of the cone 12
Is formed, while a conical outer peripheral surface 1
Finished surface 2 of work 20 from 1 to conical inner peripheral surface 12
1 is a grinding wheel having a working surface 13 having a clearance angle (θ2) with respect to 1. Therefore, the end face of a work having corners and side walls of a groove, which cannot be ground by a normal grinding device, is used. Mirror finishing can be performed extremely easily. In particular, a grinding wheel can be inserted into a processing portion such as a groove, and the boundary between the bottom surface and the side wall can be processed to a mirror surface up to a corner. In addition, since the corner of the grinding wheel has a sharp shape without roundness, the grinding wheel can be used up to the corner where the finished surface and the side wall intersect. Even sharp corners can be formed. Furthermore, the use of this grinding wheel eliminates the need for lapping. In addition, this grinding wheel has an acute angle between the conical outer peripheral surface 11 and the working surface 13 and 90 °> θ1.
> Θ2, the mirror surface of the end face and the corner can be surely finished, and the finished surface does not have unevenness such as undulation or small chipping, so that the processing accuracy is improved and the processing time is improved. Can be shortened.

[0013] Further, using the grinding wheel 1 described above,
0 is a mirror surface grinding method of grinding the finished surface 21 into a mirror surface state, so that the outer peripheral edge of the grinding wheel for the side wall of the narrow groove, particularly for the side surface of the groove narrower than the thickness of the grinding wheel. , The side wall can be easily mirror-finished, and it is possible to easily cope with a surface which has not been mirror-finished at all, and the use of the grinding apparatus is expanded. Further, this processing method has a specific effect that it can be applied to the processing of relatively small parts for information communication.

[Brief description of the drawings]

FIG. 1 is a sectional front view of a main part showing the present invention.

FIG. 2 is a bottom view of FIG.

FIG. 3 is a sectional front view of a main part showing a use state of the present invention.

FIG. 4 is a plan view showing a use state of the present invention.

FIG. 5 is a main part configuration diagram showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grinding wheel 2 Fixed part 10 Grinding stone layer part 11 Conical outer peripheral surface 12 Conical inner peripheral surface 13 Working surface 20 Work 21 Finished surface 22 Side wall 23 Escape groove

Claims (3)

[Claims] 1. A grinding device for applying a grinding wheel 1 to a finished surface 21 of a work 20 to mirror-finish the finished surface 21 and a corner between the finished surface 21 and a side wall 22. A conical outer peripheral surface 11 which is inclined at a predetermined cone angle (θ1) with respect to the conical inner peripheral surface 1 while maintaining a predetermined thickness from the conical outer peripheral surface 11 to the inside.
On the other hand, the working surface 1 having a clearance angle (θ2) from the conical outer peripheral surface 11 to the conical inner peripheral surface 12 with respect to the finished surface 21 of the work 20 on the peripheral end surface on the flared side.
3. A grindstone for mirror-surface grinding, characterized by forming No. 3. 2. The grinding wheel according to claim 1, wherein the angle between the outer peripheral surface of the cone and the working surface is acute and has a relationship of 90 °>θ1> θ2. 3. A conical outer peripheral surface 11 inclined at a predetermined conical angle (θ1) with respect to the finished surface 21 of the work 20. A predetermined thickness is maintained from the conical outer peripheral surface 11 to the inside of the conical inner surface. A peripheral surface 12 is formed, and a working surface 13 having a clearance angle (θ2) from the conical outer peripheral surface 11 to the conical inner peripheral surface 12 with respect to the finished surface 21 of the work 20 is formed on the peripheral end surface on the flared side. A mirror surface grinding method characterized in that a finished surface 21 of a work 20 is ground to a mirror surface state using the grinding wheel 1 thus formed.