JP5211958B2 - Processing fluid supply device - Google Patents

Description

The present invention relates to a machining fluid supply device for supplying a machining fluid to a grinding surface of a grindstone in a grinder, and more particularly to a machining fluid supply device for a grindstone for internal grinding.

Conventionally, the role of the machining fluid in grinding operations has been to cool the heat generated by grinding, lubricate the inner surface of the grinding stone pores to prevent grinding stones from sticking, and lubricate the cutting edges of the abrasive grains to suppress heat generation. It is to increase the life of the grindstone. Further, it is to wash away grinding scraps and dropped abrasive grains to prevent the finished surface from being scratched. For that purpose, it is important to efficiently transport the machining liquid to the vicinity of the machining point.
In an internal grinding apparatus, a method that prevents the machining fluid from being scattered by covering the entire workpiece with a cover (Patent Document 1), and the grinding fluid is applied to the workpiece through a through-hole formed along the axial direction inside the spindle. There is a method of supplying cold air for cooling the grinding point (Patent Document 2). In addition, there is a method in which a grinding liquid supply path is provided at the axis of the internal grinding shaft, and a machining liquid supply path is provided radially on the end flange of the holding cylinder for fixing the grindstone (Patent Document 3).

Further, in Patent Document 4, the nozzle body is applied to the grindstone outer peripheral surface in a substantially close contact state, so that it is not affected by the air flow around the grindstone peripheral surface, and a small amount of machining fluid is wasted. There are methods that can be used without any problems.

JP H08-25219 A JP 2001-121388 A JP 2002-11660 A JP 2003-31618 A

However, in Patent Documents 1 and 2, the apparatus is large and complicated, such as covering the work itself with a cover, or providing a machining fluid supply pipe or a cold air supply pipe, and the maintenance itself is difficult. It was. Moreover, in the thing of patent document 3, the grindstone axis | shaft must be processed and it must have the flange which provided the process liquid supply path on the parabola, and there existed a problem that cost was high.

In Patent Document 4, in order to adjust the clearance between the outer peripheral surface of the grindstone and the end surface and the nozzle body, the micrometer spindle shaft is incorporated in the fluid supply nozzle device, and the cost is high because the device is large and the structure is complicated. There was a point.
Also, it is not disclosed that the clearance between the grindstone outer peripheral surface and the nozzle body is adjusted every time when the grindstone wears and the outer peripheral surface diameter becomes small. For example, the micrometer spindle shaft is adjusted each time the grindstone is adjusted. In some cases, the work is complicated.

Accordingly, in view of the above-mentioned problems, an object of the present invention is to provide a machining fluid supply device for internal grinding that is compact and has a simple structure.

In the present invention, in the machining fluid supply device that supplies the machining fluid to the inner peripheral grinding wheel outer circumferential surface that grinds the workpiece inner circumferential surface, the nozzle head that supplies the machining fluid has a fan shape when viewed from the grinding wheel axis direction. And an opening that opens toward the grindstone, wherein the openings are formed on the inner wall surface along the outer peripheral portion of the grindstone shaft, on both side surfaces along the grindstone end surface, and from the both side surfaces toward the grindstone end surface. By providing a working fluid supply device, wherein the fan-shaped inner circumferential surface, the collar portion, and the inner wall portion are formed concentrically. Solved the problem.

That is, since the nozzle is fan-shaped and the inner peripheral surface, the collar portion, and the inner wall surface are concentric, processing is easy and installation is easy. Further, in the internal grinding, even with such a simple structure, there is no influence of the accompanying air flow and the machining fluid can be sufficiently supplied to the grinding point. In addition, since it is only necessary to supply the processing liquid to the nozzle, the size can be reduced. The fan-shaped outer peripheral surface of the nozzle is preferably concentric.

Furthermore, in invention of Claim 2, the clearance gap between the said collar part and the said grindstone was 0.3 mm or more, and was 2 mm or less.

Thereby, the machining fluid supplied to the space constituted by the grinding wheel for internal grinding and the opening is difficult to escape to the outside due to its own viscosity, and the space is always filled with the machining fluid. When the grindstone for internal grinding rotates in this state, the accompanying air flow accompanying the rotation is blocked in the space filled with the machining fluid, and the machining fluid is wound around the grinding wheel outer peripheral surface and reliably supplied to the grinding point.
Further, since the grinding effect is maintained while the opening of the nozzle head covers the outer peripheral surface of the grinding wheel for internal grinding, adjustment of the gap between the nozzle head and the grinding stone is unnecessary.

In the invention according to claim 3, a gap between the inner wall surface entrance and the inner grinding wheel is 0.3 mm or more and 2 mm or less.
Thereby, even if it is a grindstone from which a grindstone diameter differs, the dimension of only an entrance / exit should just be adjusted, and it became possible to use the same nozzle. In Document 4, the gap between the nozzle end face and the grindstone must be set strictly at 0.3 mm or less, whereas a slightly wider gap is sufficient in the present invention.

According to the present invention, as described above, even if the nozzle head has a simple structure of a sector shape, the machining fluid can be sufficiently supplied to the grinding point. While suppressing, the internal grinding has the effect of enhancing the cutting effect.

Since it is only necessary to attach the nozzle head between the grindstone for internal grinding and the workpiece, the machining liquid supply device itself can be reduced in size. Further, even if the difference between the inner diameter of the workpiece and the outer diameter of the grindstone is small, it can be easily applied.

Further, since the gap between the grindstone and the brim portion is small, the machining fluid supplied to the opening is difficult to escape to the outside. The opening is always filled with the machining fluid, and the accompanying air on the outer peripheral surface of the grinding wheel accompanying the rotation of the grinding wheel can be blocked. Therefore, since the machining fluid is reliably supplied to the grinding point on the outer peripheral surface of the grindstone, the effect of enhancing the grinding effect is achieved. In addition, since the nozzle head only needs to be fixed to the spindle end surface of the grindstone spindle, a complicated mechanism and adjustment for adjusting the clearance between the grindstone and the nozzle head are not required, and the effect of reducing the grinding cost is achieved. (Claim 2).

Moreover, since it is only necessary to ensure a gap between the inner wall surface of the nozzle head and the grindstone, the same nozzle head can be attached even when the grindstone diameter is different, and the cost can be reduced (claims). 3).

Hereinafter, a machining fluid supply device for internal grinding according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a machining fluid oil supply device for internal grinding according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1 of the present invention, and FIG. 4 is a front view, and FIG. 4 is a cross-sectional view taken along line BB in FIG.

As shown in the figure, the machining fluid supply device 4 according to the embodiment of the present invention grinds the machining fluid by placing the machining fluid on the grindstone outer peripheral surface 3 of the internal grinding wheel 2 for grinding the inner circumferential surface 1 a of the workpiece 1. For internal grinding to be supplied to the point 17. Here, the nozzle head 5 for supplying the machining fluid has a fan shape when viewed from the grinding wheel axis direction. The nozzle head 5 includes an opening 6 that opens toward the grindstone 2, and the opening 6 includes an inner wall surface 7 along the outer periphery of the grindstone shaft, both side surfaces 8 along the grindstone end surface, and a grindstone end surface 9 from both sides. And a flange portion 10 formed toward each other. Further, the fan-shaped inner peripheral surface 11, the collar portion 10, and the inner wall surface 7 of the nozzle head 5 are formed in concentric circles.

As shown in FIGS. 3 and 4, the nozzle head 5 is supported by an arm portion 12 extending in the axial direction between the workpiece 1 and the grindstone shaft 19, and the arm portion 12 is fixed to a spindle end surface 15 of the grindstone spindle 14. The nozzle 20 is configured by being fixed by screws or the like. As shown in FIG. 2, the flange portion 10, the grindstone end surface 9, and the gap t <b> 1 of the nozzle head 5 are provided. The gap t1 is set to 0.3 mm or more and 2 mm or less. As shown in FIG. 1, the inner wall surface 7 and the grindstone outer peripheral surface 3 are provided with a gap t2, and the gap t2 is set to 0.3 mm or more and 2 mm or less.
The machining fluid is supplied to the opening 6 through the machining fluid supply path 16 provided in the fixing portion 13 and the arm portion 12.

In the case of internal grinding, since the contact area between the internal grinding wheel 2 and the nozzle head 5 is relatively large compared to cylindrical grinding, surface grinding, etc., the scattering of the processing liquid is also small. Even if the gap between the flange portion 10 and the inner wall surface 7 and the grinding wheel 2 for internal grinding is more than 2 mm, there is no problem if the viscosity of the working fluid is large.

The gap should be as small as possible. However, considering the machining precision of the grinding wheel 2 for internal grinding, the nozzle head 5 and the like, it is appropriate to set the gap to 2 mm or less.

When the grinding wheel 2 for internal grinding rotates in such a state, the accompanying air flow accompanying the rotation is interrupted. Accordingly, an appropriate amount of machining fluid is wound around the outer peripheral surface 3 of the grinding wheel 2 for internal grinding, and the machining fluid is sufficiently supplied to the grinding point 17, so that the grinding point 17 is cooled, lubricated, and the grinding wheel outer circumferential surface is cleaned. The effect of equal grinding can be improved. Also, as shown in FIGS. 3 and 4, it is configured to have flange portions 10 formed from both side surfaces 8 toward the grindstone end surface 9 so that the supplied machining fluid does not scatter from the end surface of the rotating grindstone 2. Yes.

Further, since it is unnecessary to adjust the clearance between the nozzle head 5 and the internal grinding wheel 2, the processing cost can be reduced. Further, as shown by the two-dot chain line in FIGS. 3 and 4, the nozzle head 5 is merely processed into a fan shape concentrically, and since the structure is simple, the manufacturing cost is kept low and the processing is easy. . In addition, although the sector-shaped inner peripheral surface 11, the collar part 10, and the inner wall surface 7 of the nozzle head 5 are formed in concentric circles, the sector-shaped outer peripheral surface 18 may also be concentric. In the present embodiment, the nozzle head 5, the arm portion 12, and the fixing portion 13 are described as a single unit.

Although the present invention is most suitable for inner surface machining where the difference between the inner diameter diameter of the workpiece 1 and the outer diameter diameter of the grindstone 2 is small, it can also be applied to a cylindrical grinder or a surface grinder.

It is a schematic block diagram of the processing fluid oil supply apparatus for internal grinding which shows the form of this invention. It is AA sectional view taken on the line of FIG. 1 of this invention. It is a front view of the nozzle which concerns on the Example of this invention. FIG. 4 is a sectional view taken along line BB in FIG. 3 of the present invention.

Explanation of symbols

1 Workpiece 1a Workpiece inner peripheral surface 2 Grinding wheel for internal grinding 3 Grinding wheel outer peripheral surface 4 Work fluid supply device 5 Nozzle head 6 Opening portion 7 Inner wall surface 8 Both side surfaces 9 Grindstone end surface 10 Collar portion 11 Fan-shaped inner peripheral surface 12 Arm portion 13 Fixed portion 14 Spindle 15 Spindle end surface 16 Working fluid supply path 17 Grinding point 18 Outer peripheral surface 19 Grinding wheel shaft 20 Nozzle t1 Gap between the flange and the grinding wheel t2 Gap between the inner wall entrance / exit and the grinding wheel

Claims (3)

In the machining fluid supply device for supplying the machining fluid to the outer circumferential surface of the grinding wheel for internal grinding that grinds the inner circumferential surface of the workpiece
The nozzle head for supplying the machining fluid has a fan shape when viewed from the grinding wheel axis direction, and includes an opening that opens toward the grinding wheel. The opening includes an inner wall surface along the outer periphery of the grinding wheel shaft, and the grinding wheel. Both side surfaces along the end surface, and flange portions formed from the both side surfaces toward the grindstone end surface, and the sector-shaped inner peripheral surface, the flange portion, and the inner wall portion are concentric circles. A machining fluid supply device, which is formed. 2. The machining fluid supply device according to claim 1, wherein a gap between the collar portion and the grindstone is 0.3 mm or more and 2 mm or less. The machining fluid supply apparatus according to claim 1 or 2, wherein a gap between the inner wall surface entrance and the grindstone is 0.3 mm or more and 2 mm or less.

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