JP2006231460A - Grinding wheel truing jig and grinding wheel truing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grindstone truing jig and a grindstone truing method capable of easily truing a grindstone provided with a guide member in a honing tool.
When truing a grindstone provided with a plurality of guide members on a honing tool, the grindstone truing jig 10 is removed from the honing tool in a state of being integrated with the grindstone table. After being positioned on the jig body 11 by the extension tool 3, it is fixed by the fixing means 14. The jig body 11 can be supported by a cylindrical grinder and the cylindrical grinder can be operated to true the surface to be ground of the grindstone in an arc shape with a predetermined diameter. As a result, it is possible to reduce the time for truing one grindstone as compared to the conventional method, and to suppress the variation in the shape after truing and to increase the grinding accuracy.
[Selection] Figure 2

Description

  The present invention relates to a grindstone truing jig and a grindstone truing method, and more particularly to a grindstone truing jig and a grindstone truing method for truing a grindstone provided with a guide member in a honing tool.

  In general, as a honing tool used when drilling with high precision, as shown in FIGS. 5 and 6A, a honing tool 1 configured such that a plurality of grindstones 4 protrude from the outer peripheral surface of the mandrel shaft 2. Alternatively, as shown in FIG. 5 and FIG. 6B, a honing tool 1 ′ in which one grindstone 4 and a plurality of guide members 5 protrude from the outer peripheral surface of the mandrel shaft 2 is employed.

As shown in FIGS. 5 and 6A, the former honing tool 1 is configured such that a plurality of grindstones 4 protrude from the outer peripheral surface of a cylindrical mandrel shaft 2 at a predetermined interval in the circumferential direction. . The number of the grindstones 4 is appropriately determined depending on the hole diameter to be processed.
In addition, as shown in FIG. 7, a grindstone base 4a is integrated with the grindstone 4, and a tapered surface 4b is formed on the grindstone base 4a. Further, a rod-shaped expansion tool 3 is inserted into the through hole 2a of the mandrel shaft 2, and a plurality of tapered surfaces 3a corresponding to the tapered surface 4b of each grindstone base 4a are formed on the outer peripheral surface of the expansion tool 3. ing.

On the other hand, as shown in FIGS. 5 and 6B, the latter honing tool 1 ′ is employed when the machining hole diameter is small. Depending on the outer diameter size of the mandrel shaft 2, a large number of grindstones 4 are formed. Since the expansion tool 3 which can respond | correspond cannot be built in, it is comprised only by the grindstone 4 protruding, and the several outer peripheral surface is protrudingly provided with the several guide member 5 at intervals in the circumferential direction.
Further, as shown in FIG. 7, the extension tool 3 ′ used in the latter honing tool 1 ′ corresponds to the tapered surface 4 b of the grindstone base 4 a integrated with one grindstone 4 on the outer peripheral surface of the tip. One tapered surface 3a is formed.

  Further, in each honing tool 1, 1 ′ described above, the form in which the grindstone 4 protrudes in parallel from the outer peripheral surface of the mandrel shaft 2 is the same form. That is, as shown in FIG. 7, the above-described dedicated extension tools 3 and 3 ′ are inserted in the through holes 2 a of the mandrel shaft 2 of the honing tools 1 and 1 ′ in the direction of the arrow A, so that the extension tools 3 and 3 The tapered surface 3a formed on the outer peripheral surface of the tip of 'is pushed in while being brought into contact with the theme surface 4b of the grindstone table 4a. Then, the grindstone 4 is projected from the outer peripheral surface of the mandrel shaft 2 by a predetermined amount in the arrow B direction substantially parallel to the outer peripheral surface. In this state, the grindstone 4 is fixed to the mandolin shaft 2 together with the expansion tool 3 or 3 ', and used as a honing tool 1, 1' for drilling.

Therefore, when truing the plurality of grindstones 4 provided in the former honing tool 1, the honing tool 1 is left as it is, and both ends thereof are attached to the holder portions 31 and 31 of the cylindrical grinding machine 30 shown in FIG. The cylindrical grinding wheel 32 and the holders 31 and 31 are rotated so that the surface to be ground 4c of each grinding wheel 4 is truded into an arc shape with a predetermined diameter.
However, when truing one grindstone 4 provided in the latter honing tool 1 ′, the honing tool 1 ′ is left as it is, and both ends thereof are held by the holder portions 31 and 31 of the cylindrical grinding machine 30 shown in FIG. If the grinding target surface 4c of one grindstone 4 is trued into an arc shape having a predetermined diameter while being supported, the guide member 5 is also shaved together with the grindstone 4, so the cylindrical grinder 30 shown in FIG. 1 is used. I couldn't.

  Therefore, when truing one grindstone 4 provided in the latter honing tool 1 ′, as shown in FIG. 8, the single grindstone 4 is maximally removed from the outer peripheral surface of the mandrel shaft 2 by the extension tool 3 ′. The operator was truing the single grindstone 4 incorporated in the honing tool 1 ′ by the block-shaped grinding grindstone 6 manually by fixing it in the limited protruding state.

On the other hand, Patent Literature 1 is disclosed as a method and apparatus for truing a grindstone provided in a honing tool. That is, in Patent Document 1, a small-diameter mandrel shaft provided with a plurality of grindstones is rotatably fitted in a grindstone truing jig, and the grindstone truing jig has a small diameter. A grindstone truing jig main body comprising a small-diameter inner peripheral wall fitted to the outer peripheral wall of the mandrel shaft, and a large-diameter inner peripheral wall on which a grindstone forming member for shaping a rotating grindstone is disposed, and the grindstone truing jig A circular recess is fitted into the circular protrusion at the right end of the tool body and is fixed coaxially by a bolt, and is composed of an end member having a small-diameter inner peripheral wall that fits into the outer peripheral wall of the small-diameter mandrel shaft. . Then, after inserting the mandrel shaft into the grindstone truing jig, the grindstone is protruded radially outward of the mandrel shaft by the grindstone extending mechanism, and the mandrel shaft is rotated in that state, thereby removing the outer surface of each grindstone. It is disclosed that the surface is formed by a grindstone forming member.
JP-A-11-277430

  As described above, when truing one grindstone 4 provided with the guide member 5 on the honing tool 1 ′ shown in FIG. 5 and FIG. 6B, the operator manually moves the grindstone 6 with the grindstone 6. Because truing, the shape after the truing (arc shape with a predetermined diameter) is not stable and the accuracy is poor. If you try to increase the accuracy, it takes a considerable amount of time (about 60 minutes) to work. It was bad. In addition, there are variations in the shape after truing and the work time depending on the worker, which is also a problem in work efficiency and quality.

  The invention of Patent Document 1 is a honing tool truing method and apparatus for a honing tool having a plurality of whetstones, and is provided with a plurality of guide members 5 as shown in FIGS. 5 and 6A. When the grindstone 4 is trued, even if the grindstone truing method and apparatus of the invention of Patent Document 1 are employed, the guide member 5 is shaved together with the grindstone 4 and the above-described problem cannot be solved.

  This invention is made | formed in view of this point, and it aims at providing the grindstone truing jig | tool and the grindstone truing method which can easily true the grindstone with which the honing tool was equipped with the guide member. .

As a means for solving the above-mentioned problems, the invention of a grindstone truing jig according to claim 1 is a grindstone truing jig for truing a grindstone provided in a honing tool, The jig for grinding wheel truing includes a jig main body supported at both ends by a grinding facility, a positioning tool for positioning the grindstone removed from the honing tool at a predetermined position of the jig main body, and the positioning tool. A fixing means for fixing the grindstone positioned by a tool to the jig body is provided.
The invention for a grinding wheel truing jig described in claim 2 is the invention described in claim 1, wherein the positioning tool is detachable from the jig body, and the fixing means is attached to the jig body. The grindstone is provided, and is composed of a groove portion in which the grindstone is inserted integrally with the grindstone base, and a pressure contact member that presses and fixes the grindstone integrated with the grindstone base inserted in the groove portion. Is.
The invention for a grinding wheel truing jig according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the grinding stone is provided together with a guide member on the honing tool. is there.
The invention of a jig for grinding wheel truing described in claim 4 is the invention described in claim 3, wherein the positioning tool is used when positioning the grinding wheel provided with the guide member on the honing tool. It is characterized by being.

  Further, in order to solve the above-mentioned problems, the invention of the grinding wheel truing method according to claim 5 is a grinding stone truing method for truing a grinding wheel provided with a guide member in a honing tool, The grindstone is removed from the honing tool in an integrated state with the grindstone base, and the grindstone integrated with the grindstone base is inserted into a groove portion provided in the grindstone truing jig main body and an insertion hole communicating with the groove portion A positioning tool used in the honing tool is inserted into the wheel, and the grinding wheel integrated with the grinding wheel base is positioned and fixed, and then the positioning tool is removed from the insertion hole and the grinding tool truing jig Both ends of the main body are supported by grinding equipment, and the grindstone is trued into a desired shape.

Therefore, in the invention of the grinding wheel truing jig according to claim 1, the grinding stone removed from the honing tool is positioned on the jig main body by the positioning tool and then fixed to the jig main body by the fixing means. Both ends of the jig body are supported by the grinding equipment, and the grinding stone is trued into a desired shape by the grinding equipment.
In the invention of the grinding wheel truing jig according to claim 2, the grinding stone integrated with the grinding wheel base is inserted into the groove provided in the jig main body, and is pressed by the pressure contact member via the groove. Fixed to the body. Furthermore, the positioning tool is detached from the jig main body after positioning the grindstone integrated with the grindstone base on the jig main body.
The invention for a jig for grinding wheel truing described in claim 3 is particularly applied when truing a grinding wheel provided with a guide member on a honing tool.
In the invention of the jig for grinding wheel truing described in claim 4, when the grinding stone is positioned on the jig body, the form when the grinding stone is positioned on the honing tool is reproduced.

  Further, in the invention of the grinding wheel truing method according to claim 5, the grinding wheel provided with the guide member in the honing tool is removed in an integrated state with the grinding wheel base, and the grinding wheel integrated with the grinding wheel base is removed from the grinding wheel truing. After the positioning tool is positioned and fixed to the jig main body, the positioning tool is detached from the grinding wheel truing jig main body, and both ends of the grinding wheel truing jig main body are supported by the grinding equipment for grinding. The grindstone is trued into the desired shape by the equipment.

  According to the present invention, it is possible to provide a grindstone truing jig and a grindstone truing method capable of easily truing a grindstone provided with a guide member on a honing tool.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to FIGS. 1 to 4 and with reference to FIGS. 5 and 6B. The same members as those in the conventional example will be described using the same reference numerals.
As shown in FIGS. 1 to 4, a grinding wheel truing jig 10 according to an embodiment of the present invention is a block in which both ends are supported by grinding equipment, for example, holder portions 31 and 31 of a cylindrical grinding machine 30. In order to position the grindstone 4 removed from the body (jig main body) 11 and the honing tool 1 'shown in FIGS. And a fixing means 14 for fixing the single grindstone 4 integrated with the grindstone table 4 a to the block body 11. In addition to the cylindrical grinder 30, a lathe or turning center may be employed as the grinding equipment.

  As shown in FIGS. 1 to 3, the block body 11 is formed in an elongated shape, and square columnar second to fourth block bodies 16 to 18 are connected to a columnar first block body 15. Has been configured. Further, the first to fourth block bodies 15 to 18 extend in the longitudinal direction from the center of the circular section of the first block body 15 in the longitudinal direction and the longitudinal direction of the second to fourth block bodies 16 to 18, respectively. The center lines are arranged so as to be on the same straight line.

  As shown in FIG. 3, the outer diameter of the first block body 15 is set to be substantially the same as the length of the second block body 16 and the fourth block body 18 in the height direction. Further, as shown in FIGS. 2 and 3, the length between the second block body 16 and the fourth block body 18 in the height direction and the width direction is the second block body 16 and the fourth block body. A third block body 17 shorter than the body 18 is provided. When the block body 11 is rotated by the cylindrical grinding machine 30 with the grindstone 4 protruding from the upper surface 17a of the third block body 17, as shown in FIGS. The lengths in the height direction and the width direction are set so that the cylindrical grinding stone 32 does not interfere with the outer wall of the third block body 17 other than the grinding surface 4c of the grinding stone 4. Further, as shown in FIG. 4, the third block body 17 is longer in the longitudinal direction than the first block body 15, the second block body 16, and the fourth block body 18, and the cylindrical grinding machine 30. It is formed slightly longer than the width of the cylindrical grinding wheel 32.

In addition, recesses 20 and 20 are formed at substantially the center of the end surfaces of the first block body 15 and the fourth block body 18, respectively. These concave portions 20 and 20 are supported by holder portions 31 and 31 of the cylindrical grinding machine 30 shown in FIGS. 1 and 4 so as to restrict mutual rotational deviation when the holder portions 31 and 31 rotate.
Further, the amount of protrusion of the grindstone 4 from the upper surface 17a of the third block body 17 is adjusted to the approximate center in the height direction and the width direction of the second block 16 continuously from the approximate center of the end face of the first block 15. Insertion holes 23 and 23 into which the expansion tool 3 ′ for insertion is inserted are formed.

The fixing means 14 is configured as follows. That is, as shown in FIGS. 2 and 3, a groove 13 extending in the longitudinal direction is formed in the third block body 17. In addition, the second block body 16 and the fourth block body 18 are formed with slits 21 and 21 extending continuously from both ends of the groove portion 13, and the bolts 12 a, so as to intersect with the slits 21 and 21. 12a is penetrated, and nuts 12b and 12b are fastened to tip shaft portions of the penetrated bolts 12a and 12a. The bolt 12a penetrating the second block body 16 is arranged slightly above so as not to interfere with the insertion hole 23 through which the extension tool 3 ′ is inserted, and the bolt 12a penetrating the fourth block body 18 is It is arranged at the approximate center in the height direction. These bolts 12 a and nuts 12 b correspond to the pressure contact member 12.
The groove portion 13 is formed with appropriate dimensions (groove width, depth, and length) so that the single grindstone 4 integrated with the grindstone table 4a can be inserted. The bottom surface 13 a of the groove 13 is formed so as to coincide with the inner peripheral surface of the insertion holes 23, 23, in communication with the insertion holes 23, 23 provided in the body 15 and the second block 16.
Each of the slits 21 and 21 has a depth substantially the same as that of the groove 13, and the width thereof is narrower than the width of the groove 13. Circular groove portions 22 and 22 are formed at one end portions of the slits 21 and 21 at the same depth as the slits 21 and 21, respectively.

  As shown in FIGS. 2 and 3, the extension tool 3 ′ has a rod shape, and a tapered surface 3 a that abuts on a tapered surface 4 b provided on the grindstone base 4 a is formed on the outer peripheral surface of the tip. . The extension tool 3 ′ is detachably inserted into insertion holes 23 and 23 provided in the first block body 15 and the second block body 16. Further, the expansion tool 3 ′ used as the configuration of the grinding tool truing jig 10 is the expansion tool 3 ′ used in the honing tool 1 ′ shown in FIGS. 5 and 6B.

Next, using the grindstone truing jig 10 according to the embodiment of the present invention, a single grindstone 4 provided together with a plurality of guide members 5 on the honing tool 1 ′ shown in FIGS. 5 and 6B. The method of truing is described based on FIGS. 1 to 4 with reference to FIGS. 5 and 6B.
First, one grindstone 4 is removed from the honing tool 1 ′ shown in FIGS. 5 and 6B in a state of being integrated with the grindstone base 4a.
Next, the grindstone 4 integrated with the removed grindstone stand 4a is further tapered from the grindstone stand 4a side into the groove 13 provided in the third block body 17, as shown in FIGS. 4b is inserted so as to face the first and second block bodies 15 and 16 side.
Next, the expansion tool 3 ′ is inserted into the insertion holes 23 and 23 provided in the first and second block bodies 15 and 16 so that the tapered surface 3a faces upward, and the taper of the expansion tool 3 ′ is increased. The surface 3a is slid while being in contact with the tapered surface 4b of the grindstone table 4a inserted in the groove 13, and the grindstone 4 is projected from the upper surface 17a of the third block body 17 substantially parallel to the upper surface 17a. Position.
The protruding amount of the grindstone 4 from the upper surface 17a of the third block body 17 is such that the distance in the height direction between the apex of the projected grindstone 4 and the recesses 20 and 20 provided at both ends of the block body 11 is as follows. The diameter is set to be slightly smaller than the radius of the finished diameter of the processed hole.

When the grindstone 4 is protruded by a predetermined amount, the bolts 12a and 12a and the nuts 12b and 12b are tightened to reduce the width of the slits 21 and 21 and the grindstone 4 together with the grindstone base 4b by the both side walls of the groove portion 13. Fix by pressing.
Thereafter, as shown in FIGS. 1 and 4, the expansion tool 3 ′ is removed from the insertion holes 23 and 23 provided in the first and second block bodies 15 and 16, and the block body to which the grindstone 4 is fixed. 11, the concave portions 20 and 20 on both end faces are supported by the holder portions 31 and 31 of the cylindrical grinder 30, and the cylindrical grinding wheel 32 and the holder portions 31 and 31 of the cylindrical grinder 30 are rotated in a predetermined rotation direction. The ground surface 4c of the grindstone 4 is trued in an arc shape having a predetermined diameter (slightly smaller than the finished diameter of the processed hole).
When setting the truing grindstone 4 on the honing tool 1 ′, a circle connecting the apex of one grindstone 4 protruding from the outer peripheral surface of the mandrel shaft 2 and the apexes of a plurality of guide members 5. The grindstone 4 is caused to protrude from the outer peripheral surface of the mandrel shaft 2 by the extension tool 3 ′ so that the diameter becomes the finished diameter of the machining hole. When drilling with the honing tool 1 ′, only the grindstone 4 and the apex of each guide member 5 are brought into contact with the inner peripheral surface of the machining hole.

According to the embodiment of the present invention described above, when truing one grindstone 4 provided with a plurality of guide members 5 on the honing tool 1 ′ shown in FIGS. 5 and 6B, After the grindstone 4 removed from the honing tool 1 ′ in an integrated state with the grindstone table 4 a is positioned on the block body 11 of the grindstone truing jig 10 of the present invention by the extension tool 3 ′, it is fixed by the fixing means 14. Then, the extension tool 3 ′ is detached from the block body 11. Then, both ends of the block body 11 are supported by the holder portions 31 and 31 of the cylindrical grinding machine 30 and the cylindrical grinding machine 30 is operated, so that the ground surface 4c of the grindstone 4 is trued in an arc shape with a predetermined diameter. It became possible.
As a result, the time for truing one grindstone 4 is about 10 minutes, and the work time can be shortened by about 50 minutes compared to the conventional case where one grindstone 4 is manually trued. did it. In addition, when the surface to be ground 4c of the grindstone 4 is trued, variations in the shape after the truing (arc shape with a predetermined diameter) by the operator can be suppressed, and the grinding accuracy can be improved.

  The grindstone truing jig 10 according to the embodiment of the present invention described above may be provided with positioning means for positioning the expansion tool 3 ′ in the rotational direction with respect to the block body 11. With this configuration, positioning in the rotational direction when inserting the extension tool 3 ′ is facilitated, and in addition to further shortening of the work time, it is possible to more accurately project the grindstone 4 and parallelize it.

  As mentioned above, the jig | tool 10 for the grindstone truing which concerns on embodiment of this invention is the truing of the grindstone 4 with which the honing tool 1 'shown to FIG.5 and FIG.6 (b) was equipped with the several guide member 5. FIG. Although the form used when doing is explained, when truing the some grindstone 4 with which the honing tool 1 shown to FIG.5 and FIG.6 (a) is trued, the several grindstone 4 one sheet at a time It is also possible to remove one of them and fix the single grindstone 4 to the grindstone truing jig 10 of the present invention and perform truing with the cylindrical grinder 30.

FIG. 1 is a perspective view showing a state in which a grindstone fixed to a jig body of a grindstone truing jig according to an embodiment of the present invention is trued by a cylindrical grinder. FIG. 2 is a top view of the grindstone truing jig according to the embodiment of the present invention. FIG. 3 is a side view of the grindstone truing jig of FIG. FIG. 4 is a side view showing a state in which the jig body of the grinding wheel truing jig of FIG. 3 is supported by a cylindrical grinder. FIG. 5 is a perspective view showing a honing tool. 6 is a sectional view taken along line AA in FIG. 5, (a) is a diagram showing a honing tool having a plurality of grindstones, and (b) is a honing tool having one grindstone and a guide member. FIG. 7 is a cross-sectional view taken along line BB in FIG. FIG. 8 is a perspective view illustrating a state in which a single grindstone provided with a guide member in a honing tool is trued.

Explanation of symbols

1 'honing tool, 3' expansion tool (positioning tool), 4 grinding wheel, 4a grinding wheel base, 5 guide member, 10 grinding wheel truing jig, 11 block body (jig body), 12 pressure contact member, 12a bolt, 12b nut , 13 Groove, 14 Fixing means, 23 Insertion hole, 30 Cylindrical grinding machine (grinding equipment)

Claims (5)

A grinding wheel truing jig for truing a grinding wheel provided in a honing tool,
The jig for grinding wheel truing includes a jig main body supported at both ends by a grinding facility, a positioning tool for positioning the grindstone removed from the honing tool at a predetermined position of the jig main body, and the positioning tool. A whetstone truing jig, comprising: a fixing means for fixing the whetstone positioned by a tool to the jig main body. The positioning tool is detachable from the jig main body, and the fixing means is provided in the jig main body, the groove portion in which the grindstone is inserted integrally with a grindstone base, and the groove portion is inserted in the groove portion. 2. The grindstone truing jig according to claim 1, wherein the grindstone truing jig is constituted by a pressure contact member that presses and fixes a grindstone integrated with a grindstone base. The grindstone truing jig according to claim 1 or 2, wherein the grindstone is provided on the honing tool together with a guide member. The said positioning tool is used when positioning the grindstone with which the said honing tool was equipped with the said guide member, The jig for grindstone truing of Claim 3 characterized by the above-mentioned. A grinding wheel truing method for truing a grinding wheel provided with a guide member in a honing tool,
First, the grindstone is removed from the honing tool in an integrated state with the grindstone base, and the grindstone integrated with the grindstone base is inserted into the groove provided in the grindstone truing jig main body and communicated with the groove. The positioning tool used in the honing tool is inserted into the insertion hole to be positioned, and the grinding wheel integrated with the grinding wheel base is positioned and fixed, and then the positioning tool is removed from the insertion hole and the grinding wheel truing A grindstone truing method comprising: supporting both ends of a jig main body with a grinding facility and truing the grindstone into a desired shape.

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