JP2739077B2 - Dressing device for slit forming whetstone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for simultaneously grinding the inner surfaces of parallel slits by a rotating slit finishing grindstone such as a groove grinder (slitting grinder). BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dressing apparatus for a slit-shaped grindstone, in which a state in which the width becomes narrower is eliminated, and dressing of the grindstone, which enables grinding to a uniform width at all times, can be accurately performed with fine adjustment.

[0002]

2. Description of the Prior Art Dressing of a rotating slit finish forming grindstone of a slitting grinder of this kind is usually performed by rotating two dressing wheels arranged so that rotating side faces face each other with a width of a dimension for finishing a slit width to a predetermined dimension. Is generally used by pressing the above-mentioned grindstone against the slit finish forming grindstone.

[0003] In this case, when the slit has a parallel inner width and the dressing wheel is set with a parallel width corresponding to the finishing dimension of the inner width of the slit, the outermost peripheral portion of the grinding wheel is set. Since the side surface of the dressing wheel comes off the dress portion of the dressing wheel first, the side surface of the dress portion is formed wider than the inner peripheral side surface on which the inner surface of the dress portion contacts. When a workpiece is ground with such a grindstone, the outer diameter of the grindstone must be sequentially dressed so that both edges of the outer periphery of the grindstone are always cut at the stage of grinding a large number of slits. Therefore, as described above, in the state where the side surface of the outermost peripheral portion of the grindstone is formed wider than the side surface on the inner peripheral side, at the time of simultaneous grinding and finishing of the inner side surface of the slit, the slit width is initially wide toward the second half. A state that becomes narrow appears. Therefore, by setting the two rotating dressing wheels at a slight angle with respect to the same axis so that the side facing the slit finish forming grindstone has a slightly narrower width, both sides of the grindstone are at the tip of the inner surface of the dressing wheel. The dressing will be performed only in the part, the forming width can be finished to the same size on both the outermost part and the inner circumferential side of the grindstone, and from the initial stage of grinding the workpiece, the middle stage of dressing the grindstone outer diameter,
Even in the latter half period, the width of the slit does not become narrow, and a constant width can always be ensured, so that the above-described adverse effect that the slit width becomes narrow can be eliminated. The groove width is adjusted so that one of the two dressing wheels is moved along with the motor that rotates the dressing wheel in order to move the dressing wheel in the axial direction of the minute grinding wheel. Work is to move the whole including the motor, so loosen the bolts etc. that fix the whole and move the whole by a small amount, adjust the distance between the dressing wheels in that state, and then again bolt etc. The work is fixed.

[0004]

However, heretofore,
Since the two dressing wheels are parallel, the final adjustment of the groove width is to prepare several kinds of collars inserted between these dressing wheels or to wrap while adjusting one collar for trial processing. There was only a way to go. Such an operation requires a high level of skill because the adjustment accuracy is extremely high, on the order of microns or less, and there is a problem that ordinary workers cannot at all. On the other hand, since there are two dressing wheels, it is necessary to provide a motor for rotating each of them, and there is a problem that control for synchronizing the rotation becomes very difficult.

In view of the above-mentioned problems, the present invention provides a method for simultaneously grinding the inside surfaces of parallel slits with a rotating slit finishing grindstone such as a groove grinder (slitting grinder). The dressing of the grindstone, which eliminates the condition of becoming narrower toward the latter half in the initial stage, and enabling the grinding to be performed to a uniform width at all times, can be performed accurately with fine adjustment using a measuring instrument such as a dial cage. In addition, it has been devised to make it possible to rotate the dressing wheel with a single motor at the same time even if the dressing wheel is tilted by a small angle.

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided a metal workpiece in which opposing inner surfaces are formed in parallel with narrow slits. In a dressing device of a slit finish forming grindstone for finishing, two rotating dressing wheels are arranged so that rotating side surfaces face each other with a width of a dimension to finish the slit width to a predetermined size.
One of the two dressing wheels is driven and rotated by a driving device, and the other of the two dressing wheels is rotatably formed following the rotation of the one dressing wheel. The rotation axis is arranged at a slight angle to the same axis so that the side facing the slit finish forming whetstone that grinds the inner surface of the slit is slightly sandwiched, and in that state, adjustment of the facing distance between the dressing wheels The above-mentioned problem has been solved by forming the space between the bearing device itself of the driven dressing wheel itself and the space adjusting base member by a space adjusting device that allows a taper member having a slightly narrower width to enter and exit as the width approaches the front end. Is the solution.

[0007] The driven of the other dressing wheel is formed by a driven coupling, and the driven coupling has a rotating connection member that rotates together with the dressing wheel on one dressing wheel and the other dressing wheel. Each of the rotary connecting members is provided with a ridge or a groove on a surface facing the rotary connecting member along a line corresponding to the chord of the rotating arc of the rotary connecting member. The intermediate connecting member has two surfaces facing the ridges or grooves of the two rotary connecting members, and has a concave groove or ridge fitted on the two surfaces on both surfaces thereof. The concave grooves or ridges on both sides are arranged so as to intersect with each other at least to a state almost orthogonal to each other, and By is formed to be engaged by fitting the concave grooves or ridges of the ribs or grooves and the intermediate connecting member of the connecting member together, to solve the problems described above.

[0008]

According to the dressing device for a slit forming grindstone according to the present invention, the inner surface is rotated to finish the slit width of a metal work having a narrow slit parallel to the inner surface facing the inner surface to a predetermined size. In the dressing device of the slit finish forming whetstone that performs the grinding finish at the same time,
The two rotating dressing wheels are arranged so that the rotating side faces face each other with a width of a dimension that finishes the slit width to a predetermined size, and one of these two dressing wheels is driven and rotated by a driving device, and the two dressing wheels are rotated. The other of the wheels is formed so as to be rotatable following the rotation of the one dressing wheel, and is rotated by one motor.These two dressing wheels have their rotation axes aligned with the slit inner surface. A dressing wheel bearing device that is arranged at a slight angle to the same axis so that the side facing the grinding wheel is slightly narrower, and adjusts the facing distance between the dressing wheels in that state. A taper member with a slightly narrower width between itself and the distance adjusting base It is formed so as to be performed by an interval adjusting device to be inserted, and a minute interval can be surely adjusted without an operator's sense of manual work.

Further, the driven of the other dressing wheel is formed by a driven coupling, and the driven coupling has a rotating connecting member that rotates together with each dressing wheel on one dressing wheel and the other dressing wheel. Each of the rotary connecting members is provided with a ridge or a groove on a surface facing the rotary connecting member along a line corresponding to the chord of the rotating arc of the rotary connecting member. The intermediate connecting member has two surfaces facing the protrusions or grooves of the two rotary connection members, and has a concave groove or protrusion formed on the both surfaces thereof, and is formed on both surfaces thereof. The concave grooves or ridges on both sides are arranged so as to intersect with each other at least to a state almost orthogonal to each other, and The ridges or grooves of the connecting member and the grooves or ridges of the intermediate connecting member are formed so as to be fitted and connected to each other, and a change in the facing distance between the dressing wheels in a state where the angle of the minute angle center axis is shifted. In this case, power is transmitted from one motor so that two dressing wheels can rotate at the same time.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

That is, reference numeral 1 shown in the figure denotes a dressing device 1 for a slit finish forming grindstone, which is used to finish the slit width of a metal workpiece in which opposed narrow inner surfaces are formed in parallel to a predetermined dimension. The inner surface is rotated to finish the grinding at the same time.

In the dressing apparatus 1, two rotating dressing wheels 2a and 2b are arranged such that the rotating side surfaces 3 face each other with a width of a size to finish the slit width to a predetermined size. Dressing wheel 2a of one of 2a and 2b
Power transmission means 5 by a motor 4 which is a driving device.
It is formed so as to be driven and rotated via the.

Also, the two dressing wheels 2
a, 2b, the other dressing wheel 2b
The two dressing wheels 2a and 2b are formed so as to be rotatable in accordance with the rotation of the one dressing wheel 2a. Is arranged at a slight angle with respect to the same axis so that the side facing toward is slightly sandwiched, and in this state, the two dressing wheels 2a,
Adjustment of the interval between the two dressing wheels 2b is performed by a taper member 8 whose width becomes slightly narrower between the bearing device 6 of the other driven dressing wheel 2b and the interval adjusting base member 7 toward the front end.
Is formed by an interval adjusting device 9 for letting in and out.

The specific structure of the distance adjusting device 9 is shown in FIG.
As shown in the figure, the distance adjusting base member 7 is fixed, and the dressing wheel 2b and the dressing wheel 2b
11 on which the bearing device 6 supporting the shaft is mounted
Is formed so that the interval can be changed, and the tapered member 8 is disposed between the interval adjusting base member 7 and the base 11 in contact with both. It is formed so as to enter and exit. Then, the base 11 is moved by the ingress and egress of the taper member 8 and the space between the two dressing wheels 2a and 2b is set to a desired space. Then, the base 11 is fixed by the bolts 12, and the space setting is completed.

Here, the taper of the taper member 8 is, for example, 0.2 / 100 mm as the taper of the taper member 8.
If the screw pitch is 1 mm, the screw will move 2 μm for one rotation, and 1 μm, 1/4 for half a rotation.
The rotation is 0.5 μm, which makes it easy to set the interval very small.

At this time, as shown in FIG. 3, the interval check is performed by setting a dial gauge D on the other dressing wheel 2b and checking the dial gauge D thereby.

On the other hand, the other dressing wheel 2b
Are formed so as to be driven by one dressing wheel 2a and driven and rotated by a motor 4 as one driving device.

However, one of the dressing wheels 2
Since the a and the other dressing wheel 2b are not the same axis but have different axes, the structure must be sufficiently driven even if the distance slightly changes and differs. Therefore, as shown in FIG. 5, the driven coupling 21 is provided on one of the dressing wheels 2a and the other dressing wheel 2b with a rotary connecting member 22 that rotates together with the respective dressing wheels 2a and 2b.
a and 22b, respectively, and on the opposing surfaces 23a and 23b of the respective rotary connecting members 22a and 22b, concave grooves 24a and 24a along a line corresponding to the chord of the rotating circular arc of the rotary connecting members 22a and 22b. 24b is formed, and an intermediate connecting member 25 is arranged between the rotary connecting members 22a and 22b. The intermediate connecting member 25 faces the concave grooves 24a and 24b of the rotary connecting members 22a and 22b. A ridge 27 having two surfaces 26 and fitted into the concave grooves 24a, 24b is formed on both surfaces 26 thereof.
6 are arranged so as to intersect with each other at least up to a state nearly orthogonal to each other, and the concave grooves 24a, 24b of the respective rotary connecting members 22a, 22b and the projecting ridges 27 of the intermediate connecting member 25 are arranged. It is formed to be fitted and connected. In this case, a ridge may be provided on the rotary connecting members 22a and 22b, and a concave groove may be provided on the intermediate connecting member 25.

Then, as shown in FIG. 6, even if the dressing wheels 2a and 2b have slightly different angles, the dressing wheels 2a and 2b may have slightly different angles as long as the ridges 27 fit into the concave grooves 24a and 24b. Since there is backlash, if the dressing wheels 2a and 2b are slightly changed in angle, even if the facing distance between the dressing wheels 2a and 2b is finely adjusted in that state, the gap can be changed sufficiently. It can be driven accordingly. Since the ridges 27 are arranged so as to intersect with each other at least up to a state close to being orthogonal to each other, the intermediate connecting member 25 does not fall down and ensures a driven state.

[0020]

According to the present invention thus formed, the inner surface is rotated to finish the slit width of a metal workpiece having a narrow slit parallel to the inner surface facing the inner surface to a predetermined size. In a dressing device for a slit finish forming grindstone that simultaneously performs grinding and finishing, two rotating dressing wheels are arranged so that rotating side faces face each other with a width of a size that finishes the slit width to a predetermined size, and the two dressing wheels are rotated. One of the two driving wheels is driven and rotated by a driving device, and the other of the two dressing wheels is rotatably formed following the rotation of the one dressing wheel, and is rotated by one motor. These two dressing wheels are arranged at a slight angle with respect to the same axis so that the rotation axis is slightly narrower on the side facing the slit finish forming grindstone for grinding and finishing the inner surface of the slit, and the interval between them is set. The adjustment of the distance between the bearing device itself of the driven dressing wheel and the spacing adjustment base member is performed by the spacing adjustment device that allows a taper member with a slightly narrower width to enter and exit as the width goes toward the tip. Even a person can adjust the minute interval very surely without the feeling of manual work.

Further, the other dressing wheel is formed to be driven by a driven coupling. The driven coupling has a rotating connection member that rotates together with each dressing wheel on one dressing wheel and the other dressing wheel. Each of the rotary connecting members is provided with a ridge or a groove on a surface facing the rotary connecting member along a line corresponding to the chord of the rotating arc of the rotary connecting member. The intermediate connecting member has two surfaces facing the ridges or grooves of the two rotary connecting members, and has a concave groove or ridge fitted on the two surfaces on both surfaces thereof. The concave grooves or ridges on both sides are arranged so as to intersect with each other at least to a state almost orthogonal to each other, and The ridges or grooves of the connecting member and the grooves or ridges of the intermediate connecting member are formed so as to fit together and connected, and the rotation axes of the two dressing wheels are slightly angled with respect to the same axis. Even in the state, the power can be transmitted from one motor so that the two dressing wheels can rotate at the same time, even in the state where the fine spacing between the two dressing wheels is adjusted.

As described above, according to the present invention, at the time of simultaneous grinding and finishing of the inner surfaces of parallel slits by a rotating slit finish forming grindstone such as a groove grinder, the slit width is wide in the initial machining stage, Eliminating the situation of narrowing toward the second half of the year, the dressing of the grinding wheel width can be performed accurately while finely adjusting the dressing width of the grinding wheel so that it can be ground to a uniform width from the beginning to the end. It can be performed accurately, and it can be rotated by one motor at the same time even if the facing distance is adjusted with the dressing wheel tilted by a small angle. Is played.

[Brief description of the drawings]

FIG. 1 is a plan view of the present invention.

FIG. 2 is a cross-sectional view showing a state in which the dressing wheel of the present invention is supported by a shaft.

FIG. 3 is a plan view of an interval adjusting device according to the present invention.

FIG. 4 is a partially cutaway plan view showing a dressing state of the dressing device of the present invention.

FIG. 5 is an exploded perspective view of a driven coupling of the dressing wheel of the present invention.

FIG. 6 is a front view of a driven coupling of the dressing wheel of the present invention.

[Explanation of symbols]

D Dial gauge G Slit finishing grindstone 1 Dressing device 2a Dressing wheel 2b Dressing wheel 3 Rotating side surface 4 Motor 5 Power transmission means 6 Bearing device 7 Interval adjusting base member 8 Taper member 9 Interval adjusting device 11 Base 12 Bolt 21 Driven coupling 22a Rotary connecting member 22b Rotary connecting member 23a surface 23b surface 24a concave groove 24b concave groove 25 intermediate connecting member 26 surface 27 protrusion

Claims (2)

(57) [Claims] 1. A slit finish forming grindstone for simultaneously turning and grinding the inner surface of a metal workpiece in which a narrow slit whose opposing inner surfaces are parallel to each other is formed to a predetermined size. In a dressing device, two rotating dressing wheels are arranged so that rotating side faces face each other with a width of a dimension to finish the slit width to a predetermined size, and one of these two dressing wheels is driven and rotated by a driving device. The other of the two dressing wheels is formed to be rotatable following the rotation of the one dressing wheel, and these two dressing wheels have their rotation axes,
A dressing wheel that grinds the inner surface of the slit and arranges it at a slight angle with respect to the same axis so that the side facing the slit finish forming grindstone has a slightly narrower width, and adjusts the facing distance between the dressing wheels in that state. A slit forming grindstone dressing device formed by an interval adjusting device that allows a taper member having a slightly narrower width to enter and exit between the bearing device itself and the interval adjusting base member. 2. The driven wheel of the other dressing wheel is formed to be driven by a driven coupling, and the driven coupling has a rotating connecting member that rotates with one of the dressing wheels and the other dressing wheel. Each of the rotary connecting members is provided with a ridge or a groove on a surface facing the rotary connecting member along a line corresponding to the chord of the rotating arc of the rotary connecting member. The intermediate connecting member has two surfaces facing the ridges or grooves of the two rotary connecting members, and has a concave groove or ridge fitted on the two surfaces on both surfaces thereof. The grooves or ridges on both sides are arranged so as to intersect with each other at least to a state almost orthogonal to each other, Members of the ridges or grooves and the intermediate connecting member slit former grinding wheel dressing device according to claim 1, wherein the formation to be engaged groove or by a rib-fitted in.