JPS59110565A - Grinding liquid supplying device - Google Patents

Abstract

PURPOSE:To provide a cooling effect without reducing the turning accuracy of a spindle by providing a grinding liquid supplying nozzle having a directional property on a spindle central part without making no contact with the spindle, in a surface grinding rotary machine of traverse axis type. CONSTITUTION:A grinding fluid supplying pipe 14 is arranged in a hole 12 formed on the central portion of a spindle 11 without making no contact with the spindle 11, and is fixed on a spindle housing 13 by means of a fixing part 16. Further, a nozzle 15 having a directional property in the prescribed direction is attached onto the tip of the grinding fluid supplying pipe 14. And, a grinding fluid is supplied to the nozzle 15 through the grinding fluid supplying pipe 14, and injected in the respective directions according to nozzle shapes. With this situation, it is possible to attain sufficient cooling and a chip elimination effect with a small quantity of the grinding fluid without reducing the turning accuracy of the spindle.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a grinding fluid supply device for a horizontal rotary single-plane grinding machine or an axle rotary type grinding machine.

Structure of a conventional example and its problems A conventional grinding fluid supply method will be explained with reference to FIG. In the figure, 1 is a spindle, 2 is a hole provided in the center of the spindle, 3 is a rotary joint, 4 is a grindstone, 6.51 is a precision spindle bearing, 6 is a grinding fluid supply hose, and 7 is a spindle housing. The grinding wheel rotation speed of this machine is 390 to 70
It is 0 rpm.

In this machine, grinding fluid is supplied from a fixed nozzle on the outer periphery of the grinding wheel, as well as through a rotary joint 3 to a hole 2 drilled in the center of the spindle, and is supplied to the grinding point through a nozzle at the tip of the spindle. At this time, since the nozzle is also rotating at the same time as the spindle, all of the grinding fluid is supplied to the entire circumference of the grinding wheel in addition to the grinding point, resulting in a very poor efficiency of the grinding fluid.

Furthermore, since more grinding fluid is used than necessary, a large amount of atomized grinding fluid is generated, and many measures are needed to prevent problems such as rust.

Recently, due to the high precision of machine elements such as spindles, high-speed grinding can be performed with less vibration and high precision.
The use of high-speed grinding is also increasing. In high-speed grinding, the spindle rotation speed is 30. ○OOrp
If the conventional grinding fluid supply method as described above is used, the vibration of the rotary joint will be so great that machining will become impossible. Commercially available rotary joints are currently 10.0
The limit is about 00 rpm, and 4.000 to 5.00 O
The vibration is quite large even at rpm. In addition, in order to perform high-precision machining even on spindles that rotate at relatively low speeds, such as the spindle on the workpiece side, hydrostatic air bearings with good rotational accuracy are increasingly used, and one bearing
11 is relatively weak, making it difficult to maintain rotational precision.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention provides a grinding fluid supply device of a small company by reducing the occurrence of vibration in the grinding layer supply device and supplying the grinding fluid with directionality. .

Structure of the Invention The present invention consists of a spindle with a hole in the center and a grinding fluid supply pipe fixed to the spindle housing and having a directional nozzle at the tip. It has the unique effect of being able to efficiently supply the polishing solution without causing any damage.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows an apparatus in an embodiment of the invention. In Fig. 2, 11 is a spindle nozzle 12 is a hole provided in the center of the spindle, 13 is a spindle housing, 14 is a grinding fluid supply pipe, 15 is a nozzle attached to the tip of the grinding fluid supply pipe, and 16 is a grinding fluid supply. This is the part that fixes the pipe to the hole provided in the center of the spindle.

The operation of the grinding fluid supply device configured as described above will be described below.

The grinding liquid is supplied to the nozzle 15 through the grinding liquid supply pipe 14 provided without contacting the spindle, and the grinding liquid is injected in each direction according to the shape of the nozzle. At this time, the grinding fluid supply system and the spindle are not in contact with each other, and the rotation accuracy of the spindle is not deteriorated. In addition, by changing the shape of the nozzle tip, it is possible to supply the grinding fluid in accordance with the machining conditions such as the shape of the object to be galvanized and the direction of rotation of the spindle.

Figure 3 shows the positional relationship between the workpiece and the grindstone.

21 is a workpiece, 22 is a jig for attaching the workpiece, and 23 is a nozzle 24 for supplying grinding fluid to the outer periphery of a cup-shaped grindstone.

The arrows represent the direction of rotation of each spindle. In the case of FIG. 3, there are two machining parts 25 and 26. In the machining part 25, machining is mainly performed on the outer peripheral part of the grindstone, and in the machining part 26, machining is mainly performed on the inner peripheral part of the whetstone. Therefore, as shown in the nozzle shown in Fig. 4, the nozzle tip is divided into two parts, and the processing part 2
By increasing the cross-sectional area of the nozzle facing 6 and decreasing the cross-sectional area of the nozzle facing machining section 25, cooling effect and removal of chips can be performed more effectively with a small amount of grinding fluid. If the grindstone and workpiece are almost in contact over a certain angle, the grinding fluid can be supplied intensively to the processing area by making the nozzle tip fan-shaped as shown in FIG.

Effects of the Invention As described above, the present invention provides a directional nozzle in the center of the spindle without contacting the spindle.
Shosha's grinding fluid can achieve sufficient cooling and chip removal effects without reducing spindle rotation accuracy.
Its practical effects are significant.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional grinding fluid supply device, and FIG. 2 is a perspective view of a grinding fluid supply device in an embodiment of the present invention. 11... Spindle, 12... Hole, 14
...Pipe, 15...Nozzle. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4 Figure 5

Claims (2)

[Claims] (1) A spindle that can rotate at high speed and has a hole in the center, and a nozzle that has directionality at the tip, and is installed in the hole in the spindle without contacting the spindle,
A grinding fluid supply device consisting of a pipe that supplies grinding fluid. (2) The nozzle is composed of multiple nozzles with different cross-sectional areas and can supply the appropriate amount of grinding fluid to each grinding point.