JPH0661435U - Cutting oil supply device for blades - Google Patents

Abstract

(57) [Abstract] [Purpose] Sufficient cutting oil is supplied to the cutting tool used for machining, and even in the case of high-speed rotation, the supplied cutting oil is scattered in the rotation direction and the collision based on this To provide a cutting oil supply device for a cutting tool having a configuration capable of reducing a deviation from a position of a cutting edge to be shot. [Arrangement] In a tool holder holding a tool for machining, an oil sump portion is provided inside a tip end portion holding the tool, and the oil sump portion extends along a rotating direction of the tool which is being held. It has a circular arc shape, and at the oil outlet, it forms a taper with a narrow width in the direction of the cutting edge, which supplies a sufficient amount of cutting oil to the cutting edge and cut oil around the entire axis of the cutting tool. Cutting oil supply device for blades that prevents the scattering of cutting oil in the rotating direction in a dispersed state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for supplying cutting oil to a cutting tool which is used in a machine tool or the like and is held in a tool holder.

[0002]

[Prior art]

 When cutting metal with a machine tool, cutting oil is supplied to the cutting tool for the purpose of removing chips by cutting, improving the surface roughness of the cutting surface, and extending the life of the cutting tool.

In order to supply such cutting oil, there is a conventional supply system using a nozzle 4 as shown in FIG. 1 from the outside.

However, in this method, since the nozzle 4 is separately provided, it is necessary to move the nozzle 4 along with the movement of the blade 2, which is cumbersome to operate and occupies an extra space. It is not suitable for the operation of blades.

As another conventional technique, as shown in FIG. 2, a cutting oil projecting port 33 is provided around the tip of the tool holder 1, and the cutting oil is projected from there toward the cutting edge 21. However, in the method of extracting the oil from the plurality of protruding holes, the amount of the oil hitting the cutting edge 21 itself is small and the function of the cutting oil cannot be sufficiently achieved.

In addition to this, the part where the cutting oil projects from the tip of the tool holder 1 is not in contact with the periphery of the blade 2, so that when the tool holder 1 and the blade 2 rotate, they are accompanied by rotation. Since the protruding oil moves along the rotation direction, it shifts from the position of the cutting edge 21 that should be reached, and this tendency becomes remarkable especially as the rotation speed increases, and the above-mentioned function of cutting oil Inevitably suffers from the drawback of not being able to fulfill.

Further, in this method, it is actually extremely difficult to adjust the protruding direction of each cutting tool 2 even though the protruding direction of the cutting oil varies depending on the length of the cutting tool 2. It's difficult.

As another conventional technique, as shown in FIG. 3, a plurality of cutting oil projecting ports 33 are provided in a support shaft of a tool holder 1 which holds the blade 2, and the shaft surface of the blade 2 is passed through. Although there is a method of supplying cutting oil by this method, even in this method, it is impossible to supply sufficient cutting oil only by supplying oil from a plurality of projecting ports. Since the oil to be supplied is displaced in the rotational direction by the rotation of the tool holder 1, it is unavoidable that the protruding cutting oil deviates from the position of the blade 2 to which it should reach (however, in the configuration shown in FIG. 3). Since the position of the cutting oil projecting port 33 is closer to the center of rotation as compared with the case shown in FIG. 2, the degree of movement of the cutting oil along the rotation direction is smaller than that shown in FIG. The degree of such defects is small. ).

In the configuration of the prior art shown in FIG. 3, in order to avoid such drawbacks, a groove through which cutting oil passes is provided on the shaft of the blade 2, but the provision of the groove itself is troublesome. It is coarse, and such a groove cannot sufficiently overcome the above-mentioned drawbacks.

[0010]

[Problems that the device needs to solve]

 In view of the above-mentioned drawbacks of the respective prior arts, the present invention has the drawback that sufficient cutting oil is projected and the cutting oil does not hit the cutting edge 21 in the rotational direction even at high speed rotation. The point is to provide a cutting oil supply device for the blade 2 which has been corrected.

[0011]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the structure of the present invention is such that, in a tool holder that holds a tool for machining, an oil is provided inside a tip portion that holds the tool. A sump portion is provided, and the oil sump portion has an arcuate shape along the rotation direction of the cutter being held, and the oil outlet has a tapered shape that becomes narrow in the blade tip direction. It consists of a cutting oil supply device for cutting tools based on.

[0012]

[Function of the device]

 4 (a) and 4 (b) show the basic configuration of the embodiment of the present invention.

As is clear from these drawings, in the present invention, the tool holder 1 for holding the cutting tool 2 is provided with the oil reservoir 32 having an arc shape around the cutting tool 2, and the cutting oil is used. The projecting port 33 also has an arc shape along the rotation direction of the blade 2.

Therefore, a large amount of cutting oil is projected along the surface of the blade 2.

On the other hand, as is clear from FIG. 4 (a), since the cutting oil projecting port 33 has a taper shape that narrows toward the cutting edge 21, Inevitably, the surface axis of the cutting tool 2 is struck, whereby the cutting oil travels toward the cutting edge 21 while being dispersed over the entire circumferential surface of the cutting tool 2.

Therefore, even if the tool holder 1 and the blade 2 rotate, the cutting oil itself is distributed over the entire peripheral surface of the axis of the blade 2 as shown in FIG. 4 (c). Even if 2 rotates, it is retained by the viscosity of the cutting oils, and the risk of the cutting oil scattering in the rotating direction is extremely reduced.

[0017]

【Example】

 4 (a) and 4 (b) described above show an embodiment in which the oil sump portion 32 and the oil protrusion portion are provided inside the tool holder 1 itself, but FIGS. 5 (a) and 5 (b) show An embodiment is shown in which a tool holder 1 and a collet 11 interposed between the tool holder 1 and the blade 2 are provided as a collet chuck, and an oil sump 32 and a cutting oil projection 33 are provided in the collet 11.

However, the principle of operation is exactly the same as in the case of FIGS. 4 (a) and 4 (b).

[0019]

[Effect of device]

 In the present invention having the above-described configuration, since the cutting oil can be projected from almost the entire circumference of the blade along the arc, it is possible to supply the cutting oil in a sufficient amount.

Further, when replacing the blade, the work of correcting the direction of the nozzle as in the prior art shown in FIG. 2 is not necessary, and unlike the case of the conventional art shown in FIG. 3, from the root of the blade to the cutting edge. It is not necessary to process the groove up to.

As described above, in the cutting oil supply device for a cutting tool of the present invention, since a sufficient amount of cutting oil is constantly supplied to the cutting edge, the life of the cutting tool can be maintained longer than before. The value of the present invention is enormous.

[Brief description of drawings]

FIG. 1 is a side view showing a configuration of a conventional technique for supplying cutting oil using an external nozzle.

FIG. 2 is a sectional view in the axial direction, showing a configuration of a conventional technique in which cutting oil is supplied from the end face of a spindle to the cutting edge through the inside of a collet chuck.

FIG. 3 is a sectional view in the axial direction, showing a configuration of a conventional technique in which cutting oil is supplied from a support shaft in a linear direction along the periphery of a blade through an inside of a collet chuck.

4A and 4B: axial side sectional view and rotational side sectional view, showing a configuration of an embodiment of the present invention.

FIG. 4 (c): Cross-sectional view in the rotational direction of the present invention, showing a state in which the cutting oil is distributed over the entire surface in the axial direction of the blade.

5 (a) and 5 (b): axial side sectional view and rotational direction side sectional view, showing the constitution of an embodiment of the present invention. 1: Tool holder 11: Collet 2: Blade 21: Blade tip 31: Cutting oil supply passage 32: Oil reservoir 33: Cutting oil ejection port 4: Nozzle 5: Cutting oil protruding

Claims (3)

[Scope of utility model registration request] 1. In a tool holder holding a tool for machining, inside a tip portion holding the tool,
An oil sump portion is provided, and the oil sump portion has an arc shape along the rotation direction of the blade being held, and at the oil spout,
A cutting oil supply device for a cutting tool based on forming a tapered shape having a narrow width in the cutting edge direction. 2. A cutting oil for a cutting tool according to claim 1, wherein a collet is interposed between the tool holder and the cutting tool held by the tool holder, and an oil reservoir and an oil pouring outlet are provided in the collet. Supply device. 3. The cutting oil supply device for a cutting tool according to claim 1, wherein the tool holder itself is provided with an oil reservoir and an oil pouring outlet.