JP2960993B2 - Grinding fluid supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for supplying a grinding fluid to a grinding point of a grinding wheel of a centerless grinding machine or a cylindrical grinding machine.

[0002]

2. Description of the Related Art In order to efficiently perform high-precision grinding, a grinding point at which a grinding wheel and a work are in contact (usually called a "grinding point" is actually used. It is important to supply a uniform amount of grinding fluid evenly over the width of the grinding line, since it is in linear contact with a width equal to. . In the grinding process, air entrains around the grinding wheel that rotates at high speed, and this air flow prevents the grinding fluid from adhering to the peripheral surface of the grinding wheel. The structure must be designed to supply the grinding fluid.

FIGS. 6 and 7 show examples of a conventional grinding fluid supply device. The apparatus shown in FIG. 6 forms a slit 44 between a partition 42 having a lower side 41 close to the grinding wheel 3 and an outer peripheral surface of the grinding wheel 3, and grinds from a liquid reservoir 43 between the partition 42 and the grinding wheel 3. A liquid is supplied along the peripheral surface of the grinding wheel 3. A baffle plate 46 having a tip side 45 close to the grinding wheel 3 is provided above the liquid reservoir 43, and the liquid flows around the grinding wheel 3. The supplied air flow 36 is separated from the peripheral surface of the grinding wheel 3 so as not to hinder the supply of the grinding fluid.

On the other hand, the structure shown in FIG.
A nozzle 48 having a slit 47 for supplying a grinding liquid (having a width corresponding to the width of the grinding wheel 3 in a direction perpendicular to the plane of the drawing) is formed at the tip by the inner partition wall 42b. The nozzle 48 supports, for example, its upper end with a fulcrum shaft 49 in the direction perpendicular to the paper surface of the drawing, and adjusts the angle around the fulcrum shaft 49 so that the tip side 50 of the inner partition wall 42b is formed on the peripheral surface of the grinding wheel 3 Approach until just before contact,
In this way, the air flow 36 that follows the grinding wheel 3 is shut off, and the fulcrum shaft 49 is used as a pipe to supply the grinding fluid into the nozzle 48 from the pipe.

As a general problem, in the structure of FIG. 6, when the diameter of the grinding wheel 3 changes due to dressing or the like, it is necessary to adjust the positions of two points, the tip side 45 of the baffle plate and the lower side 41 of the partition wall. And the adjustment work is troublesome. 7 has a small size in the thickness direction and has to manufacture a box-shaped nozzle 48 which is wide in a direction perpendicular to the plane of the drawing.
It is difficult to make the width of the grinding wheel 7 uniform and to prevent the tip of the inner partition wall 42b from being bent, so that the supply amount of the grinding fluid in the width direction of the grinding wheel 3 becomes uneven, or the air flow that follows 36 may be partially incomplete. This tends to be a problem especially in a centerless grinding machine having a wide grinding wheel.

[0006]

It is important to supply an appropriate amount of grinding fluid uniformly. For example, when processing a lightweight work with a centerless grinding machine, if the supply of grinding fluid is excessive, excess grinding fluid scatters and enters between the work and the adjustment wheel, causing the work to dance and cause defects in the work. Occurs. In such a case, it is necessary to reduce the supply amount of the grinding fluid. However, in the conventional structure, when the flow rate of the grinding fluid is reduced, the grinding fluid flowing out of the slits 44 and 47 pulsates or the width of the grinding wheel is reduced. The variation in the flow rate in the direction becomes large, and it becomes difficult to supply a uniform grinding fluid.

As one means for solving this problem, as shown in FIG. 8, the outer partition 42a of the nozzle 48 having the structure shown in FIG.
The lower half 42c may have a structure in which the angle can be adjusted by the hinge 51 or the like, and a structure in which the width of the slit 47 is reduced.
This structure is effective as a means for adjusting the flow rate of the grinding fluid when the supply rate of the grinding fluid is 10 l / min or more for a grindstone width of 100 mm. In such a case, when the slit 47 is squeezed, there is a problem that sludge is accumulated in the slit 47 and partially clogged, and a variation in a supply amount in a width direction of the grinding wheel due to an uneven width of the slit increases. Comes up.

An object of the present invention is to provide a device capable of uniformly supplying a relatively small amount of grinding fluid to a grinding point of a grinding wheel. An object of the present invention is to provide a grinding fluid supply device that can guarantee the uniformity of the supply amount in the direction.

[0009]

The grinding fluid supply device of the present invention includes a guide plate 30 having a lower side 34 and a horizontal upper side 33 located close to the peripheral surface of the grinding wheel 3. The guide plate 30 is disposed so as to extend upward from the grinding point 26 of the grinding wheel 3, and a liquid reservoir 29 for temporarily storing a grinding liquid is formed on the grinding wheel side above the guide plate 30. The liquid reservoir 29 is provided with a grinding liquid supply means 28 for continuously supplying the grinding liquid, and the grinding liquid stored in the liquid reservoir 29 overflows from the upper side 33 of the guide plate 30 and the guide plate 30
The grinding fluid is supplied to the grinding point 26 by flowing down along the surface on the side opposite to the grinding wheel. It is preferable that the liquid reservoir 29 be provided with a wavy preventing plate 32 to diffuse the flow energy of the grinding liquid flowing into the liquid reservoir 29 from the grinding liquid supply means 28.

The guide plate 30 does not necessarily have to be formed as a single plate. As shown in FIG. 2, the guide plate 30 is formed by an upper guide plate 30a and a lower guide plate 30b, and a liquid reservoir is formed. It is possible to adopt a structure in which the grinding fluid overflowing from 29 flows down along the outer surface of the lower guide plate 30b from the upper guide plate 30a. As shown in FIG. 3, a cover plate 38 may be provided outside the guide plate 30, and a slit 40 may be formed between the lower sides of the guide plate 30 and the cover plate 38.

[0011]

According to the grinding fluid supply device of the present invention, the grinding fluid overflowing from the fluid reservoir 29 spreads over the entire surface of the guide plate 30 on the anti-grinding wheel side due to the wetting phenomenon and flows down from the lower side 34 of the grinding wheel 3. It will be transmitted to the circumference of
Even if the supply amount of the grinding liquid is small, a uniform amount of the grinding liquid can be supplied in the width direction of the grinding wheel 3, and pulsation of the supply amount does not occur. In addition, since the grinding fluid is supplied by a single plate, a structure having a simple structure and having no bend even when the grinding wheel 3 is wide can be easily formed, and therefore, the air flow accompanying the grinding wheel 3 can be cut off. It can be performed uniformly and completely.

In the case where the cover plate 38 is not provided, since the tip is formed by only one guide plate, it is necessary to install the cover plate 38 close to the grinding point 26 in a narrow area between the grinding wheel 3 and the work 25. There is a feature that can be. In the case where the cover plate 38 is provided, the grinding fluid is supplied along the guide plate 30 when the flow rate of the grinding fluid is small, and is formed between the lower sides of the cover plate 38 and the guide plate 30 when the supply amount is large. Since the grinding fluid is supplied through the slit 40, the case where the supply amount of the grinding fluid is small or large can be handled.

[0013] Further, by providing the liquid reservoir 29 with the wavy preventing plate 32, the grinding liquid causes the grinding liquid to flow to the upper side 3 of the guide plate.
3 can be prevented from overflowing intermittently and separating from the surface of the guide plate 30, so that the supply of the grinding fluid can be made more stable and the grinding fluid can be supplied even when the supply amount of the grinding fluid is relatively large. The liquid can be supplied without being separated from the surface of the guide plate 30.

[0014]

4 and 5 schematically show a centerless grinding machine provided with a grinding fluid supply device according to the present invention, in which 1 is a bed, 2 is a casing fixed to the bed 1, 3 is a casing, Is a grinding wheel mounted on the casing 2, 4 is a moving table provided at the rear end of the casing 2, 5 is a grindstone correction device mounted on the moving table 4, 6 is a lower slide provided on the upper surface of the bed 1. The platform, 7 is an upper slide platform slidably provided on the lower slide platform 6 in the left-right direction in the figure, 8 is an adjustment chassis fixed to the upper slide platform 7, and 9 is an adjustment substantially integrated with the adjustment chassis 8 The vehicle head 10 is an adjustment wheel mounted on the adjustment vehicle head 9, 11 is an adjustment vehicle correction device provided on the upper surface of the adjustment vehicle head 9, 12 is a drive casing fixed to the rear end of the lower slide 6, 13 is a drive A pulse motor fixed to the casing 12 and 14 is a pulse motor 13 In a ball screw that is moving, the tip thereof is screwed to the adjustment chassis 8. Reference numeral 16 denotes a drive motor of the grinding wheel 3 fixed to the left end of the bed 1, reference numeral 17 denotes a belt connecting the drive motor 16 and a shaft 18 of the grinding wheel, and reference numeral 19 denotes a control wheel of the adjustment wheel 10 fixed to the adjustment chassis 8. Drive motor, 20
Is a belt connecting the drive motor 19 and the shaft 21 of the adjusting wheel, 23 is a work rest fixed to the tip of the lower slide base 6, and 24 is a support blade extending upward from the work rest 23 and supporting a work 25. , 26 are the grinding wheel 3 and the work 25
The grinding point 27 in contact with is a grinding fluid supply device according to the present invention, and is disposed above the grinding point 26.

FIG. 1 is an enlarged sectional view of the grinding fluid supply device. The device 27 includes a pipe 28 mounted on a bracket (not shown) extending from the casing 2, a liquid reservoir 29 provided below the pipe 28, and a guide plate 30 for guiding the grinding fluid of the liquid reservoir 29 to the grinding point 26. Consists of Through holes 31 are provided at regular intervals on the lower surface of the pipe 28, and the grinding fluid sent into the pipe 28 flows out of the through holes 31 into the liquid reservoir 29.

The liquid reservoir 29 is provided with a ripple preventing plate 32 for suppressing the ripple by diffusing the flow energy of the supplied grinding fluid. The upper side 33 and the lower side 34 of the guide plate 30 are horizontal, the guide plate 30 is slightly curved downward toward the grinding wheel, and approaches the position just before the lower side 34 comes into contact with the peripheral surface of the grinding wheel 3.

A small hole 35 is provided at the bottom of the liquid reservoir 29, so that when the supply of the grinding liquid is stopped, the liquid reservoir 2 is closed.
Nine grinding fluids are discharged. This is to prevent the grinding fluid from remaining in the fluid reservoir 29 when the apparatus is stopped, and to prevent the grinding fluid from spilling onto the grinding wheel when the nozzle is moved, thereby causing imbalance.

The grinding fluid supply device 27 of the present invention is mounted at a predetermined position in FIG.
And the adjustment wheel 10 is rotated at high speed. The air flow 36 generated around the grinding wheel 3 is blocked at the lower side 34 of the guide plate. When the grinding fluid is supplied to the pipe 28 in this state, the supplied grinding fluid is stored in the fluid reservoir 29 with the fluid level being flat by the wavy preventing plate 32, and the grinding fluid supplied one after another from the pipe 28 is guided. It overflows from the upper side 33 of the plate, flows down while spreading over the entire outer surface of the guide plate 30, and is transmitted from the lower side 34 to the peripheral surface of the grinding wheel 3.

FIG. 2 shows a second embodiment of the present invention. In the present embodiment, the guide plate 30 is
a and the lower guide plate 30b. The upper side 33 of the upper guide plate is horizontal, and the lower side is in contact with the upper end of the lower guide plate 30b by its own weight. Lower guide plate 30
b has its upper side supported by a support rod 37 and its lower side 34
Is loosely curved toward the grinding wheel and approaches the peripheral surface of the grinding wheel 3.

The grinding fluid overflowing from the reservoir 29 flows down along the outer surface of the lower guide plate 30b from the upper guide plate 30a, and is supplied to the surface of the grinding wheel 3.

FIG. 3 shows a third embodiment of the present invention. In this embodiment, a cover plate 38 is provided outside the guide plate 30 at a predetermined interval, and a slit 40 is formed between the guide plate 30 and the lower sides 34 and 39 of the cover plate 38.

In the apparatus of this embodiment, even when the supply amount of the grinding liquid is large and the grinding liquid overflowing from the upper side 33 of the guide plate 30 is separated from the surface of the guide plate 30, scattering of the separated liquid is prevented by the cover plate 38. Is blocked by the cover plate 38
And the guide plate 30, and flows out of the slit 40. Therefore, there is a feature that it can cope with the case where the supply amount of the grinding fluid is small or large.

[0023]

The grinding fluid supply device of the present invention can supply a small amount of grinding fluid uniformly to the grinding point, and supplies the grinding fluid by one plate. It can be easily manufactured with a simple structure without bending in the width direction. Therefore, there is a feature that the uniform supply of the grinding fluid can be easily realized, and the air flow accompanying the grinding wheel can be uniformly and completely shut off.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a second embodiment of the present invention.

FIG. 3 is a sectional view showing a third embodiment of the present invention.

FIG. 4 is a front view of a centerless grinding machine.

FIG. 5 is a plan view of a centerless grinding machine.

FIG. 6 is a sectional view showing a first conventional example.

FIG. 7 is a sectional view showing a second conventional example.

FIG. 8 is a sectional view showing a third conventional example.

[Explanation of symbols]

 3 Grinding wheel 26 Grinding point 27 Grinding fluid supply device 28 Pipe 29 Liquid reservoir 30 (a, b) Guide plate 32 Wavy prevention plate 33 Upper side 34 Lower side

Claims (2)

(57) [Claims] A guide plate (30) having a lower side (34) and a horizontal upper side (33) positioned close to the peripheral surface of a grinding wheel (3) is provided with a grinding point (26) of the grinding wheel (3). ) Is arranged to extend upward from
A liquid reservoir (29) for temporarily storing the grinding liquid is formed on the upper grinding wheel side of the guide plate (30), and a grinding liquid supply means (28) for continuously supplying the grinding liquid to the liquid reservoir (29). )
A grinding wheel, characterized in that the grinding fluid overflowing from the reservoir (29) beyond the upper side (33) of the guide plate (30) flows down along the surface of the guide plate (30) on the side opposite to the grinding wheel. Grinding fluid supply device. 2. The liquid reservoir (29) according to claim 1, further comprising a wave preventing plate (32) for diffusing the flow energy of the grinding fluid flowing from the grinding fluid supply means (28) into the fluid reservoir (29). The grinding fluid supply device according to claim 1, which is provided.