JPH11347932A - Method and device for dressing and truing of thin blade grinding wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and device for dressing and truing for a thin blade grinding wheel capable of certain performance of the dressing and truing operations and of dressing and truing a plurality of thin blade grinding wheels in similar workmanship. SOLUTION: In a certain positional relationship, a thin blade grinding wheel 5 is mounted on a rotary shaft 3 with the aid of a holding jig 16, and a dressing/truing grinding wheel 11 is ground by one thin blade grinding wheel 5, and meantime, the grinding resistance acting on the thin blade grinding wheel 5 and the width of resistance variation during one turn of the thin blade grinding wheel 5 are sensed, and the grinding of the dressing/truing grinding wheel 11 is performed until judgement is passed that the specified dressed and trued condition is generated. Through the holding jig 16 the thin blade grinding wheel 5 is mounted on the rotary shaft 3 of other processing device for dressing and truing than a machine tool in which the thin blade grinding wheel 5 is used, and the dressing/truing grinding wheel 11 is ground.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a thin blade grindstone used for cutting or grooving a workpiece (hereinafter, also simply referred to as "work") such as a ceramic molded body. The present invention relates to a dressing / truing method and an apparatus used therefor.

[0002]

2. Description of the Related Art Thin blades for grinding used in machine tools and the like usually include dressing (sharpening) for exposing abrasive grains to the surface and truing for forming into a predetermined shape. After performing, it is used for actual work processing.

[0003] Dressing and truing of a thin blade grindstone is generally performed by grinding (usually grooving) a plate-like grindstone (a grindstone for dressing and truing). The quality of the dressing or truing is determined based on the processing state of the workpiece at the time of actual processing. When performing dressing and truing of another thin blade whetstone, dressing and truing are performed with reference to the previous condition.

However, the actual thin blade grindstone has a large variation in the shape and the condition of the grinding surface, and has a large eccentricity (mounting error) when it is mounted on a rotary shaft. There is a problem that truing is not easy.

[0005] In addition, there is a problem that excessive dressing and truing causes a shortening of the life of the thin blade.

The present invention solves the above-mentioned problems, and enables dressing and truing of a thin blade grindstone efficiently and reliably, and a dressing capable of dressing and truing a plurality of thin blade grindstones in the same manner. It is an object of the present invention to provide a truing method and a dressing / truing device used for the truing method.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention (Claim 1) provides a dressing method for a thin blade grindstone.
The truing method is a method for dressing and truing a thin blade grindstone used by being attached to a rotating shaft.A thin blade grindstone is attached to the rotating shaft, and the rotating shaft is rotated to grind a dressing / truing wheel with the thin blade grindstone. While processing, measure the magnitude of the grinding resistance acting on the thin blade wheel and the magnitude of the fluctuation of the grinding resistance during one rotation of the thin blade wheel, and measure the magnitude of the grinding resistance and the grinding resistance during one rotation of the thin blade wheel. It is characterized in that the dressing / truing state of the thin blade grindstone is detected from the magnitude of the fluctuation, and grinding of the dressing / truing grindstone is performed until it is determined that a predetermined dressing / truing state has been reached.

[0008] By detecting the magnitude of the grinding resistance acting on the thin blade whetstone and the magnitude of the fluctuation of the grinding resistance during one revolution of the thin blade whetstone while grinding the dressing / truing whetstone with the thin blade whetstone, In the process (that is, in-process), it is possible to detect the dressing / truing state of the thin blade, and the dressing / truing is determined by the magnitude of the grinding resistance and the fluctuation of the grinding resistance during one rotation of the thin blade. , The dressing and truing of the thin blade whetstone to a predetermined state can be ensured.

According to a second aspect of the present invention, there is provided a method for dressing and truing a thin blade grindstone using a holding jig configured to hold the thin blade grindstone and attach it to a rotating shaft in a fixed positional relationship. It is characterized in that it is attached to a rotating shaft while being held by the holding jig, and a dressing / truing whetstone is ground.

[0010] By using a holding jig configured to hold the thin blade grindstone and attach it to the rotating shaft in a fixed positional relationship, even when dressing and truing a plurality of thin blade grindstones one after another, Variations in the positional relationship between each thin blade grindstone and the rotating shaft can be prevented, and each thin blade grindstone can be more reliably dressed and trued in the same manner.

According to a third aspect of the present invention, there is provided a method for dressing and truing a thin blade grindstone, wherein the holding jig is connected to a rotating shaft of a processing device for dressing and truing which is different from a machine tool using the thin blade grindstone. It is characterized in that dressing and truing of the thin blade whetstone is performed by attaching a thin blade whetstone and grinding the dressing / truing whetstone.

A thin blade whetstone is attached via a holding jig to a rotating shaft of a dressing / truing processing device (off-line processing device) different from a machine tool using the thin blade whetstone, and the dressing / truing whetstone is attached. When performing dressing and truing by grinding, simply remove the thin blade whetstone with dressing and truing from the rotating shaft of the processing device for dressing and truing and attach it to the rotating shaft of the machine tool. Thus, it can be securely mounted without surface runout or eccentricity (radial runout). Therefore, the machining can be performed immediately, and the operation rate of the machine tool can be improved.

The dressing and truing apparatus of the present invention (claim 4) holds the rotating shaft to which the thin blade grindstone is attached, the thin blade grindstone, and the thin blade grindstone to be attached to the rotating shaft in a fixed positional relationship. The magnitude of the grinding resistance acting on the thin blade whetstone and the fluctuation of the grinding resistance during one rotation of the thin blade whetstone in the process of grinding the dressing / truing whetstone with the thin whetstone by rotating the rotating shaft with the configured holding jig and rotating shaft And a dynamometer for detecting the size of

By using the dressing and truing device configured as described above, the dressing and truing method according to any one of claims 1 to 3 can be reliably carried out, and the thin blade whetstone can be efficiently used. Dressing and truing can be performed.

The dressing and truing device according to claim 5 is characterized in that (a) the rotating shaft comprises a shaft main body, and a tapered shaft formed on an end face of the shaft main body so as to protrude in the axial direction. (B) the holding jig contacts one of the main surfaces of the thin blade grindstone so that the holding jig comes into contact with the thin blade grindstone. Has a reference surface held in a predetermined positional relationship, and has a tapered hole in the inner peripheral surface, one end face orthogonal to the axis of the tapered hole is in close contact with the end face of the shaft body, and A flange attached to the rotating shaft in such a manner that substantially the entire inner peripheral surface of the tapered hole is in close contact with the outer peripheral surface of the tapered shaft portion, and the thin blade grindstone is brought into contact with one of the principal surfaces thereof to the reference surface of the flange. For fixing thin blade whetstone to fix to flange And a flange fixing jig for fixing the flange to the rotating shaft.

The thin blade whetstone is fixed to the flange with a fixing jig in a state where one main surface thereof is in contact with the reference surface of the flange, and the flange to which the thin blade whetstone is fixed is
The flange is attached to the rotating shaft in such a manner that one end surface perpendicular to the axis of the tapered hole is in close contact with the end surface of the shaft main body, and the inner peripheral surface of the tapered hole is in close contact with the outer peripheral surface of the tapered shaft portion. This makes it possible to securely fix the thin blade whetstone at a predetermined position, thereby improving the accuracy and reproducibility of the mounting position of the thin blade whetstone. Therefore,
Before setting on the machine tool, dressing and truing with the thin blade whetstone attached to the flange in advance,
In addition, by adjusting the thin blade whetstone so that there is no runout or eccentricity (radial runout), when the flange on which the thin blade whetstone is mounted is set on the rotating shaft of the machine tool,
Processing can be performed immediately, and the operation rate of the machine tool can be improved.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

[Embodiment 1] FIG. 1 is a sectional view showing a main part of an apparatus used for carrying out a dressing / truing method of a thin blade grindstone according to an embodiment of the present invention.
The dressing and truing apparatus used in this embodiment includes a machine tool A provided with a rotating shaft 3 to which a ring-shaped thin blade grindstone 5 for cutting a workpiece such as a ceramic molded body is attached, and a plate-shaped machine. Table 12 on which a whetstone (dressing / truing whetstone) 11 is placed
A dynamometer 13 for detecting the magnitude of the grinding resistance acting on the thin blade 5 during processing and the magnitude of the variation in the grinding resistance during one rotation of the thin blade 5, and amplifying the signal detected by the dynamometer 13 And a display device 15 for displaying the result. As described above, in this embodiment, the machine tool A is also used as an apparatus for dressing and truing.

The dynamometer 13 includes not only a force acting in one direction but also an X direction parallel to both surfaces of the thin blade 5 and a Y direction parallel to both surfaces of the thin blade 5. A three-component dynamometer capable of measuring forces acting in three directions of X, Y, and Z axes when a direction perpendicular to both surfaces of the thin blade whetstone 5 is defined as a Z direction is used. In addition,
As the dynamometer 13, for example, a strain gauge, a piezoelectric sensor, or the like can be used.

Further, in the apparatus of this embodiment, the thin blade grindstone 5 is configured to be mounted on the rotating shaft 3 while being held by the holding jig 16. The holding jig 16 has a reference surface 4a with which one main surface of the thin blade grindstone 5 contacts, and has a tapered hole 4c on the inner peripheral surface, and one end surface orthogonal to the axis of the tapered hole 4c has A flange attached to the rotating shaft 3 in such a manner that the rotating shaft 3 is in close contact with the end surface 1a of the shaft main body 1 and that the entire inner peripheral surface 4d of the tapered hole 4c is in close contact with the outer peripheral surface 2a of the tapered shaft portion 2. 4, a thin blade grindstone fixing jig 6 for fixing the thin blade grindstone 5 to the flange 4 with one main surface 1a thereof abutting against the reference surface 4a of the flange 4, and a thin blade grindstone fixing jig 6 Flange 4
And a flange fixing jig 9 (nut) for fixing the flange 4 to be fixed to the rotating shaft 3.

The thin blade grindstone 5 is attached to the holding jig 16 by a fixing jig 8 comprising a thin blade grindstone fixing jig 6 and a fastening jig (nut) 7, and the thin blade grindstone fixing jig 6 is fastened. By pressing the jig 7 in the direction of the reference surface 4 a of the flange 4, the thin blade grindstone 5 is held between the reference surface 4 a of the flange 4 and the thin blade grindstone fixing jig 6.

Further, the flange 4 is provided with a tapered hole 4c in which no concave portion such as a clearance groove is formed on the inner peripheral surface, and the flange 4 has one end surface 4b formed in the end surface 1a of the shaft main body 1. The tapered hole 4c is attached to the rotary shaft 3 in such a manner that the entire inner peripheral surface 4d thereof is in close contact with the outer peripheral surface 2a of the tapered shaft portion 2.

The end surface 1a of the shaft body 1 and the tapered shaft portion 2
An escape groove 10 is formed at the boundary of the flange 4. Even if an escape groove is not formed in the tapered hole 4 c of the flange 4, the flange 4 can be connected to one end surface 4 b and the inner peripheral surface 4 d of the shaft body 1. It is configured so that it can be processed into a predetermined shape so as to be in close contact with the end surface 1a and the outer peripheral surface 2a of the tapered shaft portion 2.

Next, a method of dressing and truing the thin blade whetstone 5 using the dressing and truing apparatus configured as described above will be described.

As described above, the thin blade grindstone 5 is attached to the rotating shaft 3 via the holding jig 16, and the plate-shaped dressing / truing grindstone 11 placed on the table 12.
Grinding. Then, the dynamometer 13 detects the magnitude of the grinding resistance acting on the thin blade grindstone 5 during the processing (that is, during the dressing / truing) and the magnitude of the fluctuation of the grinding resistance during one rotation of the thin blade grindstone 5. Then, the state of the dressing and truing is monitored based on the detection result of the magnitude of the grinding resistance acting on the thin blade grindstone 5 and the magnitude of the fluctuation of the grinding resistance during one rotation of the thin blade grindstone 5 displayed on the display device 15. Then, when a predetermined dressing / truing state is attained, the grinding of the dressing / truing whetstone 11 is stopped.

That is, for example, if the magnitude of the grinding resistance acting on the thin blade grindstone 5 becomes stable during the dressing / truing process, it is determined that the dressing has proceeded and the grinding surface of the thin blade grindstone 5 has become in a good state. Further, when the magnitude of the change in the grinding resistance during one rotation of the thin blade grindstone 5 decreases, the truing proceeds, and it is determined that the eccentricity of the thin blade grindstone 5 has disappeared, and the dressing is performed at a desired time.・ End truing.

As described above, during processing (ie, during dressing / truing), the magnitude of the grinding resistance acting on the thin blade grindstone 5 and the magnitude of the fluctuation of the grinding resistance during one rotation of the thin blade grindstone 5 are detected. Thereby, it is possible to reliably know the end point of the dressing / truing of the thin blade whetstone 5.

Further, since the thin blade 5 is held on the rotating shaft 3 while being held by the holding jig 16 as described above, the thin blade 5 is securely fixed at a predetermined position via the flange 4. This makes it possible to improve the accuracy and reproducibility of the mounting position of the thin blade 5. That is, the flange 4 has a two-sided restraining structure in which one end surface of the flange 4 is in close contact with the end surface 1a of the shaft main body 1 and substantially the entire inner peripheral surface 4d of the tapered hole 4c is in close contact with the outer peripheral surface 2a of the tapered shaft portion 2. Is securely attached to a predetermined position, so that the thin blade whetstone 5 held by the flange 4 can be securely attached to the rotary shaft 3 without surface runout or eccentricity (radial runout).

[Second Embodiment] In the first embodiment, the case where the machine tool A is used as a part of a dressing / truing apparatus has been described. In this embodiment, as shown in FIG. A holding jig 1 is attached to a rotating shaft 3 of a processing apparatus B different from a machine tool using a thin blade whetstone.
The thin blade grindstone 5 is attached via the base 6 and the dressing / truing grindstone 11 is ground to perform dressing / truing of the thin blade grindstone 5.

The other structure is the same as that of the first embodiment. To avoid duplication, the corresponding parts of the first embodiment are referred to, and the description is omitted here. Note that, in FIG. 2, portions denoted by the same reference numerals as those in FIG. 1 indicate the same or corresponding portions.

As in the second embodiment, dressing and truing of the thin blade whetstone 5 is carried out offline using a processing apparatus B different from the machine tool, so that the dressing and truing can be performed in advance before the machine is set on the machine tool. Simply attaching the truing thin blade whetstone 5 to the rotating shaft of the machine tool enables the machining to be performed immediately, thereby improving the operating rate of the machine tool.

That is, the holding jig 1 capable of securely attaching the thin blade whetstone 5 to the rotary shaft 3 in a two-face constrained manner.
6, the thin blade grindstone 5, which has been dressed and trued in advance in the off-line state, can easily and surely cause the thin blade grindstone 5 to run out and eccentric (radial runout) via the flange 4. It is possible to attach the thin blade whetstone 5 to the rotating shaft of the machine tool immediately after setting the flange 4 to which the thin blade whetstone 5 is mounted on the rotating shaft of the machine tool. It is possible to greatly improve the operation rate of the machine.

It should be noted that the present invention is not limited to the above-described embodiment, but includes specific shapes such as the thickness and diameter of the thin blade grindstone, constituent materials of the thin blade grindstone, specific shapes of the rotating shaft, and the like.
Regarding the structure of the holding jig, various applications and modifications can be made within the scope of the invention.

[0034]

As described above, the present invention (claim 1)
The method of dressing and truing of the thin blade grindstone is to attach the thin blade to the rotating shaft, grind the dressing and truing whetstone with the thin blade, and the magnitude of the grinding resistance acting on the thin blade and the grinding resistance during one rotation of the thin blade. Since the state of dressing truing is determined by detecting the magnitude of the fluctuation of, it is possible to detect the dressing truing state of the grinding wheel in the process of dressing truing (that is, in-process). Thus, the thin blade grindstone can be dressed and trued efficiently to a desired state.

According to the dressing / truing method of the second aspect, when a holding jig configured to hold the thin blade whetstone and attach it to the rotating shaft in a fixed positional relationship is used, When performing dressing and truing of multiple thin blades one after another, prevent the positional relationship between each thin blade and the rotating shaft from being varied, and more reliably dress and tru each thin blade in the same manner. Becomes possible.

Further, as in the dressing / truing method according to the third aspect, the thin blade grindstone is attached via a holding jig to a rotating shaft of a dressing / truing processing apparatus different from a machine tool using the thin blade grindstone. When grinding the grinding wheel for dressing and truing, remove the thin blade whetstone that has been dressed and truing offline from the rotating shaft of the processing device for dressing and truing together with the holding jig, and rotate the machine tool. Surface runout and eccentricity (radial runout) just by attaching to the shaft
It is possible to securely mount the unit without any gaps. Therefore, the machining can be performed immediately, and the operation rate of the machine tool can be improved.

Further, the dressing / truing apparatus of the present invention (claim 4) has a rotating shaft on which the thin blade grindstone is mounted, and holds the thin blade grindstone so that the thin blade grindstone is mounted on the rotating shaft in a fixed positional relationship. Dressing / dressing with a thin blade whetstone by rotating the holding jig and rotating shaft
In the step of grinding the truing whetstone, a dynamometer for detecting the magnitude of the grinding resistance acting on the thin blade whetstone and the fluctuation of the grinding resistance during one rotation of the thin blade whetstone is provided. By using the truing device, the dressing and truing method of the present invention can be reliably performed, and the dressing and truing of the thin blade grindstone can be performed efficiently.

Further, as in the dressing and truing device of claim 5, (a) the rotating shaft has a shaft main body and a tapered shaft portion, and escapes at a boundary between the end surface of the shaft main body and the tapered shaft portion. (B) a holding jig having a reference surface with which one main surface of the thin blade grindstone abuts, a flange having a tapered hole on an inner peripheral surface, and a thin blade grindstone. When a thin blade grindstone fixing jig for fixing the flange to the rotary shaft and a flange fixing jig for fixing the flange to the rotary shaft are provided, the thin blade grindstone is securely fixed to the rotary shaft via the flange. It becomes possible to fix to the position, and it becomes possible to improve the accuracy and reproducibility of the mounting position of the thin blade grindstone. Therefore, before setting on the machine tool,
Dressing and truing in advance with the thin blade grindstone attached to the flange, and adjusting the thin blade grindstone so that there is no runout or eccentricity (radial runout), the flange with the thin blade grindstone is machined. Processing can be performed immediately upon setting the rotary shaft of the machine, and the operating rate of the machine tool can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a dressing and truing apparatus for a thin blade grindstone according to an embodiment of the present invention.

FIG. 2 is a diagram showing a dressing / truing device for a thin blade grindstone according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Shaft main body 1a End face of shaft main body 2 Tapered shaft portion 2a Outer peripheral surface of tapered shaft portion 3 Rotating shaft 4 Flange 4a Reference surface 4b One side end surface 4c Tapered hole 4d Inner peripheral surface of tapered hole 5 Thin blade grindstone 6 Thin blade grindstone fixing jig Reference Signs List 7 fastening jig 8 fixing jig 9 flange fixing jig 10 relief groove 11 plate-like grindstone (grinding stone for dressing / truing) 12 table 13 dynamometer 14 amplifier 15 display device 16 holding jig A machine tool B What is a machine tool? Different processing equipment

Claims (5)

[Claims] 1. A method for dressing and truing a thin blade grindstone used by being attached to a rotating shaft, wherein the thin blade grindstone is attached to a rotating shaft, and the rotating shaft is rotated to form a dressing / truing stone with the thin blade grinding wheel. Measure the magnitude of the grinding force acting on the thin blade and the fluctuation of the grinding resistance during one rotation of the thin blade, and measure the magnitude of the grinding resistance and the grinding resistance during one rotation of the thin blade. Dressing of a thin blade whetstone, wherein the state of dressing / truing of the thin blade whetstone is detected from the magnitude of the fluctuation, and grinding of the dressing / truing whetstone is performed until it is determined that a predetermined dressing / truing state is attained.・ Trueing method. 2. Using a holding jig configured to be able to hold the thin blade grindstone and attach it to the rotating shaft in a fixed positional relationship, the thin blade whetstone is held on the rotating shaft while being held by the holding jig. The method for dressing and truing of a thin blade grindstone according to claim 1, wherein the grinding wheel for dressing and truing is attached and ground. 3. A thin blade whetstone is attached via a holding jig to a rotating shaft of a processing device for dressing and truing, which is different from a machine tool using the thin blade whetstone, to grind the grinding wheel for dressing and truing. The dressing and truing of the thin blade grindstone is performed by performing the dressing.
Truing method. 4. A rotating shaft to which a thin blade grindstone is attached, a holding jig configured to hold the thin blade grindstone and attach the thin blade grindstone to the rotating shaft in a fixed positional relationship, and by rotating the rotating shaft. A dynamometer for detecting the magnitude of the grinding resistance acting on the thin blade grindstone and the magnitude of the fluctuation of the grinding resistance during one rotation of the thin blade grindstone in the step of grinding the dressing / truing grindstone with the thin blade grindstone. Characteristic dressing and truing equipment. 5. A rotary shaft comprising: a shaft main body; and a tapered shaft portion formed on an end face of the shaft main body so as to protrude in an axial direction. (B) the holding jig is used as a reference for holding the thin blade grindstone in a predetermined positional relationship by abutting one main surface of the thin blade grindstone. In addition to the surface, the inner peripheral surface is provided with a tapered hole, one end surface orthogonal to the axis of the tapered hole is in close contact with the end surface of the shaft main body, and substantially the entire inner peripheral surface of the tapered hole. A flange attached to the rotating shaft in such a manner as to be in close contact with the outer peripheral surface of the tapered shaft portion; and a thin blade for fixing the thin blade whetstone to the flange in a state where one main surface thereof is in contact with the reference surface of the flange. Whetstone fixing jig and flange for fixing flange to rotating shaft The dressing / truing device according to claim 4, further comprising a fixing jig.