JPS58186560A - Device for holding grindstone - Google Patents

Abstract

PURPOSE:To easily and quickly exchange a grindstone without balancing work, by providing coincidence signs in prescribed positions on a clamping flange and a sleeve for which balancing work is effected without mounting the grindstone and by causing the signs to coincide with each other in exchangeing the grindstone. CONSTITUTION:A sleeve 10 is secured on a grindstone shaft 11. A clamping flange 13 is secured on the sleeve 10 with a grindstone 20 and a spacer ring 21 interposed. A counterbalance 16 is placed in a groove 15 on a side of the sleeve 10. Coincidence signs M1, M2 are provided on the sleeve 10 and the clamping flange 13. After that, the sleeve 10 is rotated together with th shaft 11. When the sign M1 is oriented upwards, the rotation of the sleeve 10 and the shaft 11 is stopped and the signs M1, M2 are made coincident with each other. The flange 13 is then secured so that it is removed from the shaft 11 as the flange remains coupled to the sleeve 10. After that, balancing work is effected. After the grindstone 20 is mounted, the signs M1, M2 are made coincident with each other again and the sleeve 10 and the flange 13 are fitted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wheel holding device that eliminates the need for balancing when replacing the wheel.

Generally, the imbalance of the grinding wheel holding device has a large effect on the occurrence of chatter during grinding.

Conventionally, in order to eliminate such imbalance in the grinding wheel holding device, balancing is carried out by placing the grinding wheel sandwiched between the sleeve and the tightening 7 langes on a balancing stand.

However, in the conventional apparatus described above, when the sleeve, tightening 7 langes, and grinding wheel are disassembled and replaced with a new grinding wheel in order to replace the grinding wheel, an imbalance occurs and it is necessary to perform balancing again.

When we analyzed the causes of unbalance in the grindstone holding device, we found that the main causes were changes in the assembly state of the sleeve and tightening 7 langes, ii) adhesion of abrasive grains, etc. to the balance piece, and the above. It was found that if the factors were removed, the imbalance would no longer occur.

Therefore, the object of the present invention is to balance the sleeve and the tightening 7 langes without the grinding wheel attached, and to provide a phasing means such as a match mark at a specific position. By assembling both parts based on the joint, it is possible to eliminate the need for balancing when replacing the grinding wheel.

Another object of the present invention is to prevent abrasive grains from adhering to the balance piece, thereby preventing the occurrence of imbalance.

A detailed description of the present invention follows.

Fig. 1 shows a concrete configuration of a grinding wheel holding device that eliminates the cause of unbalance caused by grinding wheel exchange. It is tightened and fixed. Reference numeral 13 denotes a tightening flange, which is tightened and fixed to the sleeve 10 with bolts 14 with the grinding wheel 20 and spacer ring 21 inserted therein. Matching marks Ml and M2 are formed on the respective sides of the sleeve 10 and the tightening 7 flange 13.

On the other hand, an arcuate groove 15 centered on the sleeve axis is formed on the side surface of the sleeve 10, and a balance bead 16 is accommodated in the groove 15. This balance piece 16 is engaged with and disengaged from the groove 15 by operating a port 17, so that its mounting position can be adjusted in the circumferential direction. The outer side of the balance piece 16 is the sleeve 10
It is covered with a cover 18 fixed to the side surface of the plate to prevent abrasive grains and the like from adhering to it.

Next, the operation of attaching and detaching the grinding wheel holding device in the above configuration will be explained. First, a sleeve 10 having matching marks Ml and M2 formed thereon and a tightening flange 13 are prepared, and the sleeve 1o is tapered fitted onto the grinding wheel shaft 11 therein, and further tightened and fixed with a nut 12. Thereafter, the sleeve 10 is rotated together with the wheel shaft 11 and stopped at a position where the matching mark M1 is oriented upward.

The tightening 7 langes 13 are fitted so that the mounting marks Ml and M2 are aligned with LI, and are further fixed integrally with the tightening bolts 14. Through this tightening operation, the sleeve 10 and the tightening 7 flange 13 are assembled in a specific positional relationship that forms a dimension G1 on the opposite side of the matching marks Ml and M2, as shown in No. 2 (2). .

After that, this sleeve 10 and the tightening 7 langes 13
is removed from the grinding wheel shaft 11 while still integrated, and balanced. This balancing is performed by placing the sleeve 10 and the tightening flange 13 on a balancing table (not shown) using a well-known method with the grinding wheel 20 removed, and shifting the position of the balancing piece 16 in the circumferential direction as necessary. To do something.

After balancing, the two are separated, and only the sleeve 1o is tapered fitted onto the grinding wheel shaft 11 with the matching mark M1 facing upward, and further tightened with a nut 12.

Thereafter, the grinding wheel 20 is fitted onto this sleeve IO. At this time, the grinding wheel 2o is fitted eccentrically to the sleeve 10 due to a minute gap G2 generated between the two, as shown in FIG. Therefore, when the grinding wheel 20 is dressed and dried after the grinding wheel is installed, the shaded area in FIG. 3 is partially removed, causing an upward imbalance. However, in the tc41' design, the unbalance point P7jr of the grinder itself is pre-marked on the side surface of the grinder when the grinder is attached. ) are assembled downward to offset the imbalance between the two.

The unbalance caused by removing the grinding wheel 20 is slightly larger than the unbalance of the grinding wheel itself, and cannot be completely canceled out, but the difference is small and does not pose a particular problem.

Following the attachment of the grinding wheel, the tightening flange 13 is fitted onto the sleeve 10 so that the matching marks Ml and M2 match, and the tightening bolt 14 is further tightened to clamp the grinding wheel 2o.

In order to match the matching marks Ml and M2, it is important to assemble the sleeve 1o and the tightening flange 13 in the same state as when they were first assembled, that is, in a balanced state.

In other words, if the mating marks Ml and M2 are facing upward during the first assembly, and the gap G1 is positioned on the opposite side, the initial assembly will be As before, first position the sleeve 10 with the matching mark M1 facing upward, and then tighten the 7 flange 13 against the sleeve 10 with the matching mark M1 facing upward.
, M2 are tightened so that they are aligned with each other in the upward state, so that the sleeve 1° and the tightening 7 flange 13 are assembled in exactly the same state as when they were first assembled, that is, in a state where there is no imbalance at all.

Through the above series of operations, there is no unbalance between the sleeve 10 and the tightening flange 13, and the unbalance of the grinding wheel itself is effectively offset by the unbalance caused by removing the grinding wheel 20, and the grinding wheel system Overall, unbalance is extremely reduced, and grinding can be performed without causing chatter or the like.

Although the coolant containing abrasive grains is scattered during the above-mentioned grinding process, since the balance piece 16 is covered with a cover 1s [teaF], no abrasive grains adhere to the balance piece 16, and the occurrence of unbalance is prevented.

Further, when the grinding wheel 20 wears out while the above-mentioned grinding process is repeated and the diameter of the grinding wheel decreases to a predetermined size, the grinding wheel is replaced.

To replace the grinding wheel, place the new grinding wheel 20 in the sleeve 10 with its unbalance point P facing down, as described above.
It is only necessary to tighten the tightening 7 flange 13 so that the mating marks Ml and M2 are aligned with each other with the mating marks Ml and M2 facing upward, and there is no need to remove the sleeve 10 and no balancing is required.

As mentioned above, unbalance can be caused by the unbalance of the grinding wheel itself and unbalance caused by removal of the grinding wheel by dressing, but as mentioned above, this unbalance can also be caused by the assembling of the grinding wheel. This problem can be solved by changing the procedure, so it is preferable to adopt this procedure for assembling the wheel when using the device of the present invention.

If necessary, a match mark M3 is also formed on the cover 18, and by assembling the cover 18 using the match mark M2 as a reference, unbalance can be more precisely prevented.

The matching marks Ml, M2, M3 may be engraved with a suitable tool, paint, tape, etc., or may be a specific member.

As mentioned above, the present invention balances the sleeve and the tightening flange without the grinding wheel attached, and provides a phasing means such as a matching mark at a specific position. It has the advantage that it can be assembled in an unbalanced state without balancing by simply aligning the matching marks, and that the grinding wheel can be replaced easily and quickly.

Further, since the present invention has a structure in which the balance piece is covered with a cover, there is no adhesion of abrasive grains to the balance piece, and there is an advantage that occurrence of an anno-lance can be prevented over a long period of time.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a vertical cross-sectional view of the main part of the grinding wheel holding device, FIG. 2 is an explanatory view illustrating the assembled state of the sleeve and the tightening flange, The figure is an explanatory diagram illustrating the assembled state of the sleeve and the grinder. 10...Sleeve, 11...Wheel shaft, 13...
Tighten 7 langes, 16...balance piece, Ml. M2. M3... Match mark. Patent applicant Toyota Machinery Co., Ltd. Figure 2 Ml? , Figure 3

Claims (2)

[Claims] (1) In a wheel holding device that clamps the grinding wheel between a sleeve attached to the grinding wheel shaft and a tightening flange, the sleeve and the tightening 7 langes are equipped with an assembly balanced by a balance piece before the grinding wheel is held. A wheel holding device characterized by being provided with a phase matching element such as a matching mark that matches each other when the sleeve and the tightening flange are assembled in the attached state. (2) The grindstone holding device according to claim 1, wherein the sleeve has a cover that protects the balance piece from dust such as abrasive grains.