JPH0398737A - Removing device for chip of work machine - Google Patents

Abstract

PURPOSE:To completely perform the elimination of a chip, by providing a vent hole in the rotating shaft center direction inside a spindle and cutting tool at least and composing it so as to inject the pressure gaseous body flowed in from the other end part of a spindle from the tip of the cutting tool. CONSTITUTION:In the case of performing the necessary work, for example, grooving with the relative motion of a cutting tool C and work W, the pressure air of a compressor is injected from the tip of the cutting tool C through the spindle 10' communicated with an air inlet 9 and the vent holes 5, 6 of the cutting tool C, when it is fed from the air inlet 9. This downward pressure air is deviated by the bottom face of the work W and blown up to the upper part. Since this pressure air acts on the cutting part effectively and without any loss, it is eliminated to the upper part even in case of the notch depth being large or the chip being heavy.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a chip removal device for a processing machine that removes chips generated during cutting using pressurized gas.

(Prior art) Utility Model Application No. 1 was developed as a device for removing chips using pressurized air.
- There is something disclosed in No. 72303.

The configuration of this conventional device will be explained with reference to FIG.

That is, the machining head B has the machining motor 10 facing downward, and the cutting tool C is mounted on the spindle 10'.

Air intake 1 around the processing motor 10 mentioned above? A dust collecting cover 13 is arranged on the lower edge of the dust collecting cover 13 to surround the lower end in the direction of the spindle lO', and a dust collecting brush surrounding the cutting tool C is attached to the lower edge of the dust collecting cover 13. 1
4 will be established. The upper end opening 12' of the ventilation cover 12 is
Contact the dust collection vacuum or dust removal blower outside the machine.

A ventilation passage 15 is vertically provided in the side wall of the ventilation cover 12, the upper opening 15' is connected to the compressor outside the machine, and the lower opening 15'' is connected to the processing motor 1 in the dust collection cover 13.
The air outlet 16' at the lower end of the conduit 16 is located near the bottom of the conduit 16, and the air outlet 16' is located near the bottom of the conduit 16.
The lower edge of No. 3 is directed toward the workpiece W in contact.

Next, the operation and effects of this conventional device will be explained.

In the process of machining with the cutting tool C while bringing the lower edge of the dust collecting brush 14 into contact with the workpiece W, pressurized air is blown out from the air outlet 16' of the conduit 16 that communicates with the compressor, while at the same time the workpiece W is being machined by a vacuum or the like. Collect and remove chips.

In the above, the air outlet is connected to the cutting tool C and the workpiece W.
Since it is oriented toward the machine, it is possible to collect and remove dust while blowing off chips adhering to the workpiece and cutting tools. Moreover, in this case, there is no scattering of chips to the surrounding area.
It is possible to benefit the health of the worker, and since the cutting tool can be cooled, the cutting performance can be improved.

(Problem to be Solved by the Invention) The above air outlet is provided as close as possible to the cutting tool, but it cannot be set at a close distance to avoid interference with the workpiece. Effective chip removal cannot be expected when using a long tool with a large cutting depth, for example, under poor cutting conditions.

In the case of such a long tool, it is particularly difficult to remove chips, and the chips that accumulate in the cutting part may impede the cutting surface of the workpiece, or cause the cutting tool to generate heat, resulting in a reduction in sharpness. .

The above-mentioned accumulation of chips is noticeable when processing heavy materials such as plastics and aluminum, and there has been a demand for the development of a removal device that can effectively remove chips. The present invention has been made in view of the above-mentioned conventional problems, and aims to provide a device that can effectively remove chips by ejecting pressurized gas directly from the tip of the tool toward the cutting part. It is.

(Means for Solving the Problem) In order to achieve the above object, a chip removal device for a processing machine according to the present invention is configured as follows. That is, the gist of the present invention is that, in a cutting head in which a cutting tool is attached to one end of a spindle via a chuck, a ventilation hole in the direction of the rotational axis is provided inside at least the spindle and the cutting tool, and the spindle The reason is that the pressurized gas that flows in from the other end is blown out from the tip of the cutting tool. (Function) Pressure gas is ejected directly from the ventilation hole at the tip of the cutting tool toward the cutting area, and the blow-up action dispels chips to the outside, making it suitable for machining with large cutting depths. Chips can also be effectively removed. Moreover, since the pressurized gas flows inside the cutting tool, a cooling effect can be obtained, and cutting performance can be improved.

(Example) Hereinafter, one example of the chip removal device for a processing machine according to the present invention will be specifically described.

Figure 1 shows a longitudinal sectional view of a processing head equipped with this device. In this figure, parts that are the same or equivalent to those of the conventional device described above are designated by the same reference numerals, and redundant explanation will be omitted.

Reference numeral 1 denotes a collet chuck provided at one end of a spindle 10', and a cutting tool C is attached downward to this collet chuck 1. 2 and 3 are upper and lower flange plates of the processing motor 10; 4 is a bearing 5 of the flange plates 2 and 3 that rotatably supports the spindle 10'; One end is opened downward and the other end is opened upward. Reference numeral 6 denotes a ventilation hole provided in the interior of the cutting tool C in the direction of the rotation axis, the upper end of which opens toward the aforementioned ventilation hole 5 of the spindle 10', and the lower end of which opens toward the workpiece W below. 7 is a communication space between both ventilation holes 5 and 6 provided in a sealed manner in the collet chuck 1; 8 is a communication space between the air supply port 9 and the spindle 1;
A compressor device (not shown) is connected to the supply pipe 8, which is a pressure air supply pipe facing the opening at the other end of 0'.

Since the structure of the chip removal device according to one embodiment is as described above, when compressed air from a compressor (not shown) is supplied from the air supply port 9, the spindle 10' communicating with the air supply port 9 and the cutting tool Pressure air blows out from the tip of the cutting tool C through the ventilation holes 5 and 6 of the cutting tool C.

When a required process, for example, grooving, is performed by relative movement between the cutting tool C and the workpiece W, downward pressure air is diverted by the bottom surface of the workpiece W and blown upward. The above-mentioned pressurized air acts on the cutting part effectively and without waste, so even if the depth of cut is large or the chips are heavy, they can be removed upwards. In addition, it is possible to prevent damage to the cutting surface caused by cutting, and to improve cutting performance by suppressing heat generation of the cutting edge.

The chips scattered upward are removed to the outside from the dust collection tube 12' by the action of a vacuum device (not shown).

In the above embodiment, the cutting tool C is directly attached to one end of the spindle 10' by the collet chuck 1. However, the mounting of the tool on the spindle 10' is not limited to the above method, and the method shown in FIG. 3 may be used.

That is, the tool holder 21 is removably fitted into the tapered hole 20 at one end of the spindle 10'.
A cutting tool C is attached via a collet chuck L to the machine.

22 is a drawbar provided in the spindle 10'; 23 is a tapered portion of the tool holder 21; and 24 is a pull stud. In this case, a ventilation hole 5 is provided inside so that the drawbar 22, pull stud 24, and tapered portion 23 communicate with each other.

Further, in the above embodiment, the vent hole 6 is opened only at the tip of the cutting tool C, but even if the vent hole 6 is opened at a midway position of the tool, the effect of removing chips can be obtained.

As described above, in this invention, a compressor device is connected to the supply pipe 8, and pressurized air is blown out from the tip of the tool C. However, if the configuration is opposite to that described above, that is, if a vacuum device is connected to the supply pipe 8, chips can be sucked from the tip of the tool and removed to the outside.

In this case, it is necessary to tightly seal the opening of the rotating spindle 10' and the fixed intake port 9 (exhaust port) to prevent chips from entering the bearing.

(Effects of the Invention) As explained in detail above, the chip removal device according to the present invention is configured to eject pressurized gas from the tip of the cutting tool, so that it can effectively act only on the cutting part. The effect is that chips can be completely removed. Therefore, processing problems caused by accumulated chips can be rationally solved.

Furthermore, since the pressurized gas flows inside the cutting tool, a cooling effect can be obtained and cutting performance can be improved.

It should be noted that although the present invention is particularly effective when machining is performed using a long tool, it exhibits similar effects when machining using other tools.

[Brief explanation of drawings]

The drawings show an embodiment of a chip removal device for a processing machine according to the present invention, in which FIG. 1 is a longitudinal sectional view of a processing head to which the invention is applied. FIG. 2 is a bottom view of a cutting tool. A vertical sectional view showing another example of a processing head. FIG. 4 is an explanatory diagram of a conventional device. 1: Collet chuck 5, 6: Ventilation hole 7: Communication space 8: Supply pipe 9: Air supply port lo: Processing motor 10
': Spindle 11: Intake path 12: Ventilation cover 1
4: Dust collection brush B: Processing head C: Cutting tool W:
Workpiece 21: Tool holder 22 = Drawbar 24
:Alstad

Claims (1)

[Scope of Claims] In a cutting head in which a cutting tool is attached to one end of the spindle via a chuck, a ventilation hole is provided in the direction of the rotational axis at least inside the spindle and the cutting tool, and a ventilation hole is provided in the direction of the rotational axis from the other end of the spindle. A chip removal device for processing machines that blows out the inflowing pressurized gas from the tip of the cutting tool.