JPH0994759A - Coolant nozzle for surface grinding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To drag the flow of a coolant according to the rotation of a grinding wheel so as to surely feed the coolant to a grinding point and so as to prevent grinding burn by tilting a coolant discharging port upward above a horizontal face and setting the coolant discharging direction upward above the horizontal face. SOLUTION: In grinding by means of a surface grinder, a grinding wheel 1 is rotated in the direction C, and a workpiece 2 is reciprocated in the direction A, while a coolant 7 is jetted toward the grinding wheel 1 so as to cool down the grinding wheel 1, so that grinding heat and chips generated following machining are eliminated. In this case, a coolant nozzle 10 constructed of a pipe part, 10a and a nozzle part, 10b is provided, and its discharging port, 11 is opened upward above the horizontal face so as to discharge the coolant 7. In this way, the flow of the coolant 7 is dragged according to the rotation of the grinding wheel 1 and brought to the opposite side of the discharging port, 11 beyond the lowermost point P of the grinding wheel 1, so that the coolant 7 can be surely fed to a grinding point even when the workpiece 2 is reciprocated laterally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coolant nozzle used in a surface grinder.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIG. In the figure, 1 is a grindstone, which is rotatably held by a grindstone shaft (not shown) of a surface grinder.
A workpiece 2 is attached to a magnet chuck mounted on a table (not shown) of a surface grinder so as to reciprocate in the horizontal direction (direction of arrow A in the figure). Three
Is an L-shaped coolant nozzle, which is held by a bracket 5 fixed to the grindstone cover 4 so as to be movable in the vertical direction (direction of arrow B in the figure). 6 is a knob for the coolant nozzle 3
Is fixed to the bracket 5. The coolant nozzle 3
Is composed of a pipe portion 3a and a nozzle portion 3b, and a flow path for the coolant 7 is provided inside. The pipe portion 3a is connected to a coolant tank (not shown), and the discharge port 8 of the nozzle portion 3b is oriented horizontally. During grinding
The grindstone 1 is rotated in the direction of arrow C, the workpiece 2 is reciprocated in the direction of arrow A, and the coolant 7 is discharged toward the grindstone 1. The coolant 7 cools the grindstone 1 and collects on the upper surface of the workpiece 2 to remove grinding heat and chips generated during the machining. In the case of surface grinding, the workpiece 2 with respect to the grindstone 1 is moved from the position of the solid line where the upper right end surface X1 of the workpiece 2 is located to the left of the grindstone 1 to the upper left end surface X of the workpiece 2.
2 is moved to the position of the dotted line located to the right of the grindstone 1.
Further, the rotation direction of the grindstone 1 is not changed during processing.

[0003]

However, the coolant 7
Is supplied at an angle close to the tangent line of the grindstone 1, therefore, when the workpiece 2 is not directly under the grindstone 1, the amount of the coolant 7 that wraps around the lowermost point P of the grindstone 1 to the opposite side of the discharge port 8 is small. .
Therefore, when the workpiece 2 moves rightward from the position indicated by the solid line and when the right end side of the workpiece 2 moves leftward from immediately below the grindstone 1 toward the position indicated by the solid line, the workpiece 2 is supplied to the upper surface of the workpiece 2. Since the amount of coolant 7 is small and the workpiece 2 is to be ground in a state similar to dry grinding, grinding burn occurs on the upper surface on the right end side of the workpiece 2 or chips are welded to the surface of the grinding wheel to cause grinding stones. Life has shortened. An object of the present invention is to solve the above-mentioned problems, to provide a coolant nozzle for a surface grinder capable of reducing grinding burn and improving the life of a grindstone.

[0004]

The above-mentioned problems can be solved by inclining the coolant discharge port above the horizontal plane so that the coolant discharge direction is above the horizontal plane.

[0005]

As a result of ejecting the coolant 7 so as to collide with the grindstone surface, the coolant 7 hangs around due to the rotation of the grindstone 1, and even when the workpiece 2 is not present, it goes beyond the lowest point P of the grindstone 1 and is opposite to the discharge port. The amount of the coolant 7 that wraps around the side increases.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. The same parts as those in FIG. 3 are designated by the same reference numerals. Reference numeral 10 is a substantially L-shaped coolant nozzle including a pipe portion 10a and a nozzle portion 10b, and a discharge port 11 is opened upward from a horizontal plane. With the above configuration, the coolant 7 is discharged so as to collide with the grindstone surface,
It flows along with the rotation of the grindstone 1 and flows around the lowermost point P of the grindstone 1 to the opposite side of the discharge port 11. As a result, the coolant 7 is surely attached to the upper surface of the work piece 2 regardless of whether the work piece 2 moves from the left end position to the right direction or when the work piece 2 moves toward the solid line position to the left. Can be supplied to the grinding point.

FIG. 2 shows a second embodiment of the present invention. The same parts as those in FIG. 3 are designated by the same reference numerals. Reference numeral 12 is a substantially L-shaped coolant nozzle composed of a pipe portion 12a and a nozzle portion 12b. By arranging the nozzle portion 12b with respect to the pipe portion 12a so as to form an acute angle, the discharge port 13 is positioned above a horizontal plane. It is designed to incline.

[0008]

As described above, according to the present invention, there is an effect that the coolant flows along with the rotation of the grindstone, is reliably supplied to the grinding point, and the grinding burn is prevented. In addition, welding of chips on the surface of the grindstone is prevented, and the life of the grindstone is improved.

[Brief description of drawings]

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

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

FIG. 3 is a diagram showing a conventional technique.

[Explanation of symbols]

 1 Grindstone 2 Workpiece 3,10,12 Coolant nozzle 8,11,13 Discharge port

Claims (1)

[Claims] 1. A coolant nozzle for a surface grinding machine, wherein a coolant discharge port is inclined above a horizontal plane so that a coolant discharge direction is above the horizontal plane.