JPS61241065A - Coolant supply device of grinding machine - Google Patents

Abstract

PURPOSE:To cool a grinding wheel surely by furnishing No.1 nozzle, which is to inject the cleaning liquid in the direction along with rotation of the grinding wheel, and No.2 nozzle which is located in the neighborhood thereof and injects a high pressure coolant in the direction opposite to the rotation. CONSTITUTION:A work W is placed on a working table 10 and ground by a large grinding wheel 12, wherein the jet 14 of No.1 nozzle 13 is located facing that part of work W to be ground, and the jet 16 of No.2 nozzle 15 facing the periphery of the grinding wheel 12. Under grinding, high-pressure coolant is sprayed to the grinding wheel 12 from this jet 16 while low-pressure coolant is injected out of the jet 14 toward that part of work W to be ground. Accordingly no air layer A will be formed at the periphery of the grinding wheel 12 in its zone from the point whereto the high-pressure coolant is sprayed to the part ground, to ensure that the low-pressure coolant is certainly fed to the part to be ground. Also spraying of high-pressure coolant will detach minute grinding splinters from the grinding wheel 12. It is also acceptable to furnish No.3 nozzle 20. Thus the life of a grinding wheel can be prolonged.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a grinding machine equipped with a grindstone that is rotationally driven to grind a workpiece.

(Prior art and problems to be solved by the invention) Conventionally,
In this type of grinding machine, for example, as shown in FIG. 2, the grinding wheel 1 is driven to rotate, and the workpiece W on the work table 2 is moved in the direction of the arrow in the figure.
The workpiece W is ground by the grindstone 1.

In addition, from the nozzle 3 disposed on the right side of the whetstone 1,
A cooling liquid is injected between the machine and the workpiece W, and the workpiece W is cooled and cleaned by the cooling liquid.

However, as the whetstone 1 rotates, an air layer A is generated on the outer periphery of the whetstone 1 as shown by the two-dot chain line in FIG. There is a problem that the spray is not accurately sprayed onto the grinding part. As a result, even if a cooling liquid is used, sufficient cooling and cleaning effects cannot be obtained, leading to problems such as a decrease in grinding efficiency and a shortened lifespan of the grindstone.

(Object of the invention) This invention was made in view of the above circumstances, and
The purpose of this is to be able to accurately inject cooling liquid to the grinding part of the workpiece, to reliably cool and clean the grinding wheel, etc., and to perform efficient grinding. An object of the present invention is to provide a cooling liquid supply device for a grinding machine that can extend the life of a grinding wheel.

(Means and operations for solving the problem) In order to achieve the above object, in the present invention, a cooling liquid is injected between the workpiece W and the grinding wheel 12 along the rotation direction of the grinding wheel 12. A first nozzle 13, which is disposed close to and above the first nozzle 13, and injects high-pressure cooling liquid from the first nozzle 13 toward the grindstone 12 in a direction opposite to the rotation direction thereof. A cooling liquid supply device consisting of a second nozzle 15 is provided.

Therefore, an air layer A is not formed on the outer periphery of the grinding wheel from the second nozzle 15 to the grinding part of the workpiece W due to the cooling liquid injected from the second nozzle 15. Grinding debris stuck on the surface is cleaned.

The cooling liquid is efficiently and accurately supplied from the No. 1 nozzle 13 between the grindstone 12 and the workpiece W in the portion where the air layer A is not formed.

(Example) An example embodying the present invention will be described below with reference to FIG. A work table 10 is supported on a frame (not shown) of the grinding machine so as to be movable in the left-right direction and front-rear direction, and a workpiece W made of a lump metal material or the like is mounted and fixed on the work table 10. On the other hand, above the work table 10, a drive shaft 11 that extends horizontally and horizontally is supported by the frame so as to be rotatable and movable up and down. A grindstone 12 is replaceably attached to the end of the drive shaft 11, and is rotated together with the drive shaft 11 in the direction of the arrow in FIG.

A first nozzle 13 having a substantially hollow pipe shape is attached to the frame so as to be located on the right side of the grindstone 12. This first nozzle 13 has three arm parts 13a to 13C.
Each arm portion 13a to 13c has a pair of joint portions 1.
The upper arm portion 13c is connected to the frame so as to be adjustable in angle through the upper arm portion 3d. And the first
As shown in the figure, when a large grindstone 12 is attached to the drive shaft 11, the first nozzle 13 is connected to its joint 13d.
By bending at , the tip of the lower arm portion 13a is placed close between the grindstone 12 and the workpiece W. Further, as shown in FIG. 2, when the small grindstone 12 is attached, the lower arm 13a and the intermediate arm 13b of the first nozzle 13 are extended at the joint 13d. The arm 13a is moved leftward from the position shown in FIG. 1, and the tip of the lower arm 13a is placed close between the small grindstone 12 and the workpiece W.

Further, a narrow injection port 1 is provided at the tip of the lower arm portion 13a.
4 is formed. Cooling water is supplied to the first nozzle 13 by a pump (not shown) at a predetermined pressure (1 to 2 kg/cffl in this embodiment) and a predetermined flow rate (30 to 401/min in this embodiment). Low-pressure cooling water is injected from the injection port 14 to the grinding portion of the workpiece W along the rotational direction of the grindstone 12.

A second nozzle 15 made of a hollow pipe with a diameter smaller than that of the first nozzle 13 is attached to the upper surface of the lower arm portion 13a of the first nozzle 13 via a member 17 along the lower arm portion 13a. It is attached so that it can slide. This second nozzle 15 has a pair of arm parts 15a and 15b, and both arm parts 15a.

15b are connected to each other by a joint part 15c so that the angle can be adjusted. As shown in FIGS. 1 and 2, the angle formed by both arm portions 15a and 15b is changed depending on the size of the grindstone 12 to be attached, and the one arm portion 15a is attached to the outer periphery of the grindstone 12. It protrudes obliquely upward toward the surface, that is, in a direction opposite to the rotation direction of the grindstone 12 . Furthermore, a narrow injection port 16 is provided at the tip of this one arm portion 15.
is formed.

The second nozzle 15 is connected to the first nozzle 1.
A gear pump (not shown) supplies cooling water with a higher pressure than that at a predetermined pressure (in this example, 25 to 3
0kg/ad) and a predetermined flow rate (in this example, 101/ad)
2) of high-pressure cooling water is injected from the injection port 16 in a direction opposite to the direction of rotation of the grindstone 12. Therefore, usually
The air layer A formed on the outer periphery of the grindstone 12 as it rotates is not formed between the tip of the second nozzle 15 and the part of the workpiece W to be ground.

Now, in the grinding machine configured as described above, when grinding the surface of the workpiece W using the large grindstone 12 as shown in FIG. After fixing the object W, the drive shaft 11 together with the grindstone 12
is moved up and down to maintain a constant distance between the grindstone 12 and the top surface of the work table 10. Further, the first and second nozzles 13° 15 are bent at a predetermined angle at their joints 13d and 15c, and the injection port 14 of the first nozzle 13 is arranged to face the grinding part of the workpiece W. The injection port 16 of the second nozzle 15 is arranged to face the outer periphery of the grindstone 12 . In this state, when the grindstone 12 is driven to rotate and the workpiece W is moved back and forth and left and right together with the work table 10, the surface of the workpiece W is ground.

During this grinding work, the injection port 1 of the second nozzle 15
High-pressure cooling water is injected from 6 to the grinding wheel 12, and
Low-pressure cooling water is injected from the injection port 14 of the first nozzle 13 toward the grinding portion of the workpiece W. Therefore, in this embodiment, an air layer A that would normally be formed as the grindstone 12 rotates is formed around the outer periphery of the grindstone 12 from the high-pressure cooling water injection part to the grinding part of the workpiece W. As a result, low-pressure cooling water is reliably supplied to the grinding portion of the workpiece W.

In addition, by spraying high-pressure cooling water, fine grinding debris is removed from the grinding wheel 1.
It is peeled off from 2.

On the other hand, as shown in FIG.
, 13b are extended at their joints 13d, and their injection ports 14 are arranged to face the grinding portion of the workpiece W, and the arrangement position of the second nozzle 15 is rotated and slid to adjust its injection port 16. The grinding wheel 12 is arranged close to and facing the outer peripheral surface of the grindstone 12. If the grinding machine is operated in this state, the high-pressure cooling water from the second nozzle 15 prevents the formation of an air layer A in the grinding part of the workpiece W, similar to when the large grindstone 12 is used as described above. Therefore, low-pressure cooling water can be accurately injected between the grinding wheel 12 and the workpiece W, and the grinding work can be performed efficiently.

In addition, in this embodiment, the lower arm portion 13a of the first nozzle 13 is disposed so as to be movable in the left-right direction, so that regardless of the size of the grindstone 12 used, the injection port 14 can be can be placed exactly opposite the grinding part.

Moreover, since the angle between one arm 15a and the other arm 15b of the second nozzle 15 can be adjusted, and the second nozzle can be slid,
The jet 016 can be accurately placed in a desired direction with respect to the grindstone 12.

Note that the present invention is not limited to the above-mentioned embodiment, and for example, as shown by the two-dot chain line in FIG.
A third nozzle 20 equipped with three arms connected through a pair of joints so that the angle can be adjusted is provided on the left side of the grindstone 12, and the third nozzle 20 is directed to the grinding part of the workpiece W. It is also possible to inject cooling water towards it.

In this case, further cooling and cleaning effects can be expected.

(Effects of the Invention) As described above in detail, the present invention includes a first nozzle that injects a cleaning liquid between the workpiece and the grindstone along the rotating direction of the grindstone, and a A cooling liquid supply device is provided, which includes a second nozzle disposed above the grinding wheel and a second nozzle that sprays a higher pressure cooling liquid than the first nozzle toward the grinding wheel in a direction opposite to the rotational direction of the grinding wheel. The cooling liquid can be accurately injected to the grinding part, and the cooling liquid can reliably cool the grinding wheel, etc., allowing efficient grinding and extending the life of the grinding wheel. It has this excellent effect.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of a grinding machine embodying the present invention, and FIG. 2 is a front view showing the grinding machine with a small grindstone mounted thereon. FIG. 3 is a front view showing a conventional example of the present invention. In the figure, 12 is a grindstone, 13 is a first nozzle, 15 is a second nozzle, and W is a workpiece.

Claims (1)

[Claims] 1. A grinding machine equipped with a grinding wheel (12) that is rotationally driven to grind a workpiece (W), the workpiece being rotated along the rotational direction of the grindstone (12). (W) and the grinding wheel (12), the first nozzle (
13), which is disposed close to and above the first nozzle (13), and directs a high-pressure cooling liquid from the first nozzle (13) to the grindstone (12) in the direction of rotation thereof. A cooling liquid supply device for a grinding machine, characterized in that it is provided with a second nozzle (15) that sprays in the direction. 2. The cooling liquid supply device for a grinding machine according to claim 1, wherein the injection angle of the second nozzle (15) with respect to the grindstone (12) is adjustable. 3. The first nozzle (13) includes a plurality of joints,
In addition to being configured so that the angle can be adjusted at each joint,
According to claim 1 or 2, the injection port (14) of the first nozzle (13) approaches and separates from the grindstone (12) based on the adjustment operation. A cooling liquid supply device for a grinding machine according to any one of the items.