JP2002103223A - Device for dressing periphery of rotary grinding wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of dressing a periphery of a rotary grinding wheel efficiently with high accuracy. SOLUTION: The device 10 for dressing the periphery of the rotary grinding wheel comprises a plurality of dressers 17, 18 arranged on an arm 13 in spaced relation along an axis of oscillation, so that when the dresser 17 wears out, a frame 11 is displaced along the axis of oscillation to allow the use of the other dresser 18, and the dressing of the periphery of the rotary grinding wheel can be carried out efficiently. The plurality of dressers 17, 18 can be positioned simultaneously relative to the arm 13, and the worn dresser does not need detaching during the dressing, so that dressing accuracy can be increased substantially.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dressing apparatus for dressing an outer periphery of a rotary grindstone in an arc shape in the direction of a rotation axis, and more particularly, to an improved dressing apparatus capable of dressing a rotary grindstone with high precision and efficiency. A dressing device.

[0002]

2. Description of the Related Art Conventionally, a rotary grindstone has been used to form a concave groove having an arc-shaped cross section in the width direction on the surface of a metal member. It is necessary to dress in advance the same sectional shape as the groove. Therefore, a dressing device called an R dresser as shown in FIG. 7 has been conventionally used.

The R dresser 1 shown in FIG. 7 has a pair of left and right horizontal swing shafts 3 penetrating coaxially in a U-shaped frame 2 when viewed from the front, and swings freely by these horizontal swing shafts 3. A dresser 5 is detachably attached to a central part of a supported bower dresser arm 4 in a front view.

When the outer periphery G1 of the rotary grindstone G is dressed in an arc shape in the rotation axis direction by using such an R dresser 1, as shown in FIGS. 1 and the grinding wheel G
Is rotated about its axis of rotation. Then, by manually operating the handle 6 fixed to the one swing shaft 3, the dresser arm 4 is reciprocated swinging around the axis of the swing shaft 3, and the tip 5 a of the dresser 5 is moved to the outer circumference G 1 of the rotary grindstone G. The contact makes it possible to dress the outer periphery G1 of the rotary grindstone G in an arc shape in the rotation axis direction.

[0005]

However, in the conventional R dresser 1 described above, since only one dresser 5 is mounted on the dresser arm 4, the diamond dressing is performed at the stage of forming the outer periphery G1 of the rotary grindstone G roughly. In some cases, the tip 5a of the dresser 5 is worn, and the shape accuracy cannot be obtained at the time of final finishing.

In such a case, the worn dresser 5
Must be accurately re-positioned, and the operation of dressing the outer periphery G1 of the rotary grindstone G is complicated and inefficient.

Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, eliminate the need to reposition or replace the dressing tool during the dressing operation, and provide a high precision outer periphery of the rotary grindstone. It is an object of the present invention to provide an outer peripheral dressing device for a rotary grindstone capable of efficiently dressing.

[0008]

According to a first aspect of the present invention, there is provided an apparatus for dressing an outer periphery of a rotating grindstone, the arm being capable of extending along the outer periphery of the rotating grindstone to be dressed, and the arm being swingable. And a frame supported by the frame. The arm is capable of mounting a plurality of dressing tools for dressing the outer periphery of the rotary grindstone at intervals in the swing axis direction.

In other words, the outer peripheral dressing device for a rotary grindstone according to the first aspect of the present invention allows a plurality of dressing tools to be mounted on the arm, so that when one of the dressing tools is worn, the frame is displaced in the direction of the pivot axis. Thus, the operation of dressing the outer periphery of the rotary grindstone using the next dressing tool can be continued. At this time, since the dressing tools are arranged at intervals in the swing axis direction, when dressing is performed using one dressing tool, another dressing tool does not interfere with the rotary grindstone. In addition, while multiple dressing tools can be positioned simultaneously with respect to the arm,
It is not necessary to remove worn dressing tools,
Dressing accuracy can be greatly increased. In addition,
The plurality of dressing tools may be two dressing tools for rough forming and finish forming.

According to a second aspect of the present invention, in the dressing apparatus of the first aspect of the present invention, there is provided a swinging wheel for positioning the dressing tool by engaging with both the arm and the frame. The apparatus further includes arm fixing means for fixing the arm at a position so as not to swing.

That is, in order to position all of the plurality of dressing tools with high accuracy, it is preferable to keep the dresser arm stationary. At this time, since the outer peripheral dressing device of the rotating grindstone according to the second aspect can fix the arm to the frame using the arm fixing means, the operation of positioning a plurality of dressing tools can be performed easily and with high accuracy. Can be.

According to a third aspect of the present invention, there is provided the outer peripheral dressing device for a rotary grindstone according to the first or second aspect, wherein a test piece to be trial-cut using the dressed rotary grindstone is held on the frame. And a test piece holding means for the test piece.

That is, it is necessary to actually grind a thin test piece such as a bakelite plate in order to confirm whether or not the outer periphery of the rotary grindstone has been dressed in a predetermined shape. At this time, conventionally, the dressing rotary whetstone was transferred to another device for trial cutting,
The work of trial cutting and the work of re-dressing have been extremely complicated. In contrast, claim 3
Since the test piece is held on the frame by the test piece holding means in the peripheral dressing device for a rotary grindstone described in (1), the test grinding can be performed without transferring the dressed rotary grindstone to another device. When the outer peripheral shape of the rotary grindstone is defective, the dressing operation may be restarted, so that the operation of dressing the outer periphery of the rotary grindstone can be performed efficiently.

According to a fourth aspect of the present invention, there is provided an outer peripheral dressing apparatus for a rotary grindstone according to the third aspect, wherein the test piece holding means has a test piece holding portion provided on the arm fixing means. . Thus, it is not necessary to separately manufacture the arm fixing means and the test piece holding means, so that the dressing apparatus can be manufactured at low cost.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an outer peripheral dressing apparatus for a rotary grindstone according to the present invention will be described below in detail with reference to FIGS. In the following description,
The same parts are denoted by the same reference numerals and the description thereof is omitted. The direction of the rotation axis of the rotary grindstone is referred to as the front-rear direction, the direction of the swing axis is referred to as the left-right direction, and the vertical direction is referred to as the vertical direction.

First, referring to FIG. 1, a description will be given of an outer peripheral dressing apparatus 10 of a rotary grindstone according to the present embodiment. A U-shaped frame 11 mounted on a grinding table (not shown) is It has a pair of left and right support portions 11a and 11b that extend. A pair of left and right swing shafts 12L, 12R extending horizontally in the left-right direction and coaxially with each other are provided on the upper ends of these support portions 11a, 11b.
Are loosely fitted around the axis thereof so as to be freely rotatable.

The dresser arm 13 which is curved in an arc shape in a front view so as to be able to extend along the outer periphery of the rotating grindstone to be dressed has both ends at a pair of left and right swing shafts 12L, 12R.
Are tightly fitted to each other, and are pivotally supported by the frame 11 so as to be swingable around a horizontal swing axis. Also,
A handle 14 is fixed to the tip of the swing shaft 12L on the left side in the figure, and the dresser arm 13 can be reciprocated by manually operating the handle 14. In addition, a pair of stoppers 15 and 16 used for regulating the swing angle of the dresser arm 13 are provided on the swing shaft 12L on the left side in the figure.

An inexpensive rough forming dresser 17 and an expensive finish forming dresser 18 are provided at the center of the dresser arm 13 in the longitudinal direction (left-right direction) at intervals in the swing axis direction. It is mounted so as to extend perpendicularly to the swing axis and its tip is positioned at a predetermined position. A slot 13a extends through the dresser arm 13, and both dressers (dressing tools) 17, 18 are provided.
By mounting the pair of bolts B after mounting, the dressers 17, 18 can be firmly fixed.

Next, referring to FIG. 2 and FIG. 3, the outer periphery G1 of the rotary grindstone G is formed using the dressing apparatus 10 of the present embodiment.
The procedure for dressing will be described.

First, after the dressing apparatus 10 is mounted on the grinding table S, the frame 11 is ground so that the tip 17a of the dresser 17 for rough forming is located immediately below the rotating shaft C of the rotating grindstone G. Positioning is performed on the table S. Thereafter, the handle 14 is manually operated to swing the dresser arm 13 back and forth in a direction perpendicular to the plane of the drawing to move the outer periphery G1 of the rotating grindstone G in the direction of the rotation axis C as shown in FIG. It can be roughly formed into an arc.

When the rough forming of the rotary grindstone G is completed, the grinding table S is slid in the direction of the swinging axis, and the tip 18a of the dresser 18 for finish forming is located immediately below the rotary axis C of the rotary grindstone G. The frame 11 is positioned as described above. Thereafter, when the handle 14 is manually operated to swing the dresser arm 13 back and forth in a direction perpendicular to the plane of the drawing, the outer periphery G1 of the rotating grindstone G is formed into an arc shape in the direction of the rotating axis as shown in FIG. Finish molding is possible.

That is, in the outer peripheral dressing apparatus 10 for a rotary grindstone of this embodiment, the dresser 17 for rough forming and the dresser 18 for finish forming are mounted on the dresser arm 13 side by side in the direction of the swing axis. After rough forming the outer periphery G1 of the rotary grindstone G using the dresser 17 for forming,
By displacing the grinding table S in the direction of the swing axis, the outer periphery G1 of the rotary grindstone G can be finish-formed immediately using the dresser 18 for finish forming. At this time, the dresser 17 for rough forming and the dresser 18 for finish forming are arranged at intervals in the swing axis direction, so that when one of the dressers 17 is dressing, the other is in contact with the rotary grindstone G. There is no interference. In addition, the dresser 17 for rough forming and the dresser 18 for finish forming can be mounted on the dresser arm 13 while being positioned at the same time, and it is not necessary to remove the dresser 17 for rough forming after the completion of rough forming. Processing accuracy when dressing the outer periphery G1 can be greatly increased.

In this embodiment, the dresser 17 for rough forming and the dresser 18 for finish forming are combined, but, for example, three or four dressers can be mounted side by side. As the dresser, an inexpensive single-stone dresser can be used for rough forming, and an expensive point dresser can be used for finish forming. At this time, the point dresser, which has become unusable due to wear, can be used for rough forming, which is economical.

Next, referring to FIG. 4, a dresser 1 for rough forming will be described.
A procedure for mounting the dresser 7 and the dresser 18 for finish molding on the dresser arm 13 will be described.

As shown in FIG. 4, the dresser arm 13
When the dresser 17 for rough forming and the dresser 18 for finish forming are mounted on the, the dresser arm 13 is swung to the highest position. Then, the reference surface 11 of the frame 11
After the block gauge 20 of a predetermined size is placed on the c, both the dressers 17, 18 are contacted so that the tips 17a, 18a of the dressers 17, 18 contact the upper surface 21 of the block gauge 20.
Position 18. Next, the two dressers 17 and 18 are fixed to the dresser arm 13 by tightening the pair of bolts B shown in FIG.

At this time, in order to accurately position the dressers 17 and 18, the swing position of the dresser arm 13 is set so that the axes of the dressers 17 and 18 extend perpendicular to the upper surface 21 of the block gauge 20. Must be adjusted. Therefore, the dressing device 10 of the present embodiment
In the above, the dresser arm 13 can be fixed so as not to swing using a dresser arm fixing member (arm fixing means) 30.

The dresser arm fixing member 30 is formed by machining a steel block by machining.
1 and a frame-side fitting portion 31 which is slidably fitted in the direction of the swing axis on the upper end side wall of the right supporting portion 11b, and a dresser arm 13 which is fitted on the right end side wall of the dresser arm 13 in the drawing. And an arm-side fitting portion 32 that can be fixed at the highest position or the lowest position. The dresser arm fixing member 30 can be fixed to the upper end of the support portion 11b by tightening the fixing bolt 33. Further, on the upper part of the dresser arm fixing member 30, a concave groove 34 and a fixing bolt 35 for mounting a test piece described later are provided.

Thus, the dresser arm fixing member 30
Is mounted on the upper end of the support portion 11b of the frame 11, the dresser arm 13 can be fixed to the highest position so as not to swing, so that the axes of the dressers 17, 18 are aligned with the block gauge 2
The dresser arm 13 can be non-swingably fixed so as to extend perpendicular to the upper surface 21 of the zero. Therefore, by bringing the tips 17 a, 18 a of the dressers 17, 18 into contact with the upper surface 21 of the block gauge 20, the dressers 17, 18 can be accurately positioned with respect to the dresser arm 13. In particular, in this embodiment, since the dresser arm fixing member 30 is fitted to the side wall of the support portion 11b of the frame 11 and the end side wall of the dresser arm 13, the dresser arm 13 can be accurately moved to the highest position without rattling. Can be positioned.

Next, referring to FIG. 6, the outer circumference G1 of the rotary grindstone G will be described.
A procedure for trial-cutting a test piece in order to confirm whether dressing has been performed in a predetermined shape will be described.

In order to confirm whether the outer periphery G1 of the rotary grindstone G has been dressed in a predetermined shape, it is necessary to actually grind a thin test piece such as a bakelite plate. At this time, in the dressing apparatus 10 of the present embodiment, the test piece T can be held by the dresser arm fixing member 30 described above.

When the dressing operation is completed, the rotary grindstone G is raised directly above and the grinding table S is moved in the direction of the swing axis. Thereafter, with the dresser arm 13 oscillated to the lowermost position, the dresser arm fixing member 30 is attached to the upper end of the support portion 11b on the right side of the frame 11 in the drawing.
Is fixed, the right end of the dresser arm 13 in the figure and the dresser arm fixing member 30 are fitted to each other, and the dresser arm 13 can be fixed to the lowest position so as not to swing.

A concave groove 3 is provided on the upper surface of the dresser arm fixing member 30 and extends vertically and horizontally with respect to the swing axis.
After inserting the lower end of the test piece T, which is a rectangular bakelite plate, into the inside 4, the test piece T can be firmly held by tightening the fixing bolt 35. Next, after the grinding table S is moved in the direction of the pivot axis to position the test piece T, when the rotating grindstone G is gradually lowered, the work of trial-cutting the upper end of the test piece T by the rotating grindstone G can be performed. it can.

When the shape of the outer periphery G1 of the rotating grindstone G is defective, the rotating grindstone G is raised and the grinding table is moved in the direction of the swing axis, and then the test piece T and the dresser arm fixing member 30 are moved to the frame. Remove from 11. Thereafter, after the grinding table S is moved again in the direction of the pivot axis and the rotating grindstone G is lowered, the dressing operation can be resumed. At this time, since the dressing device 10 is not moved in the front-rear direction, that is, in the rotation axis direction of the rotary grindstone G, the operation of dressing the outer periphery G1 of the rotary grindstone G can be performed with high accuracy and efficiency.

In this embodiment, the test piece T is mounted on the dresser arm fixing member 30. However, a dedicated test piece holding device is provided so that the test piece T can be fixed at another position of the frame 11. The member may be manufactured separately.

Although the embodiments of the outer peripheral dressing apparatus for a rotary grindstone according to the present invention have been described in detail above, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications are possible. No. For example, in the above-described embodiment, the saddle-shaped arm fixing member 30 fitted to the upper end of the support portion 11b of the frame 11 is used.
However, the dresser arm 13 can be fixed using a pin penetrating both the frame 11 and the dresser arm 13.

[0036]

As is apparent from the above description, the outer peripheral dressing apparatus for a rotary grindstone of the present invention has a plurality of dressing tools arranged on the arm at intervals in the swing axis direction. When one of the dressing tools is worn, another dressing tool can be used by displacing the frame in the swing axis direction, and the operation of dressing the outer periphery of the rotary grindstone can be performed efficiently. Further, a plurality of dressing tools can be simultaneously positioned with respect to the arm, and it is not necessary to remove the worn dressing tool, so that the dressing accuracy can be greatly increased. In addition, the outer peripheral dressing device of the rotary grindstone of the present invention can fix the arm so that it cannot swing with respect to the frame by using the arm fixing means, so that the operation of positioning a plurality of dressing tools can be performed easily and with high accuracy. be able to. In addition, the outer peripheral dressing apparatus for a rotary grindstone of the present invention can hold a test piece to be test-cut using the dressed rotary stone on a frame using a test piece holding means. There is no need to transfer to a device, and trial cutting and dressing work can be performed alternately, and the work of dressing the outer periphery of the rotary grindstone can be performed with high precision and efficiency.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing an outer peripheral dressing apparatus for a rotary grindstone according to an embodiment of the present invention.

FIG. 2 is a front view showing a state in which the rotary grindstone is dressed using the apparatus shown in FIG. 1;

FIG. 3 is a front view showing a state where the rotary grindstone is dressed using the apparatus shown in FIG. 1;

FIG. 4 is an overall perspective view showing a state in which arm fixing means is mounted on the apparatus of FIG. 1;

FIG. 5 is a front view showing a state in which arm fixing means is mounted on the apparatus of FIG. 1;

FIG. 6 is an overall perspective view showing a state where a test piece holding unit is mounted on the apparatus of FIG. 1;

FIG. 7 is a front view showing a conventional dressing device.

FIG. 8 is a cross-sectional view showing a state where the outer periphery of the rotary grindstone is dressed.

[Explanation of symbols]

 S Grinding table 1 Conventional dressing device 2 Frame 3 Oscillating shaft 4 Dresser arm 5 Diamond dresser 6 Handle 10 Dressing device of the present invention 11 Frame 11a, 11b Support portion 11c Reference surface 12L, 12R Oscillating shaft 13 Dresser arm 13a Slotting DESCRIPTION OF SYMBOLS 14 Handle 15 and 16 Stopper 17 Dresser 18 Dresser 20 Block gauge 21 Upper surface 30 Dresser arm fixing member 31 Frame fitting portion 32 Arm fitting portion 33 Fixing bolt 34 Groove 35 Fixing bolt

Claims (4)

[Claims] 1. An arm extending along an outer periphery of a rotating grindstone to be dressed, and a frame for swingably supporting the arm, the arm for dressing the outer periphery of the rotating grindstone. A plurality of dressing tools can be mounted at intervals in the direction of the swing axis, and an outer periphery dressing device for a rotary grindstone is provided. 2. The apparatus according to claim 1, further comprising an arm fixing means for fixing the arm so as not to be able to swing at a swinging position when positioning the dressing tool by engaging with both the arm and the frame. Item 4. An outer peripheral dressing device for a rotary grindstone according to Item 1. 3. The rotary grinding wheel according to claim 1, further comprising test piece holding means for holding a test piece to be trial-cut using the dressed rotary grinding wheel on the frame. Outer peripheral dressing device. 4. The apparatus according to claim 3, wherein said test piece holding means comprises a test piece holding portion provided on said arm fixing means.