JP3057955B2 - Turning tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in the structure of a turning tool capable of improving the life of a cutting edge.

[0002]

2. Description of the Related Art FIGS. 11 to 13 show an example of a conventional turning tool of this type. In the turning tool shown in these figures, a throw-away tip 8 is mounted and fixed via a sheet member 6 to a tip seat 4 formed at a tip end portion of a tool main body 2. A substantially L-shaped lever member is inserted inside the tool body 2 with one end 12 inserted through the mounting hole 9 of the throw-away tip 8 and the other end positioned below the clamp screw 10. The indexable tip 8 is fixed to the tip seat 4 via a lever member by tightening the clamp screw 10.

[0003] When cutting a work material with the conventional turning tool as described above, the indexable insert 8 is used.
There is a problem that the temperature near the tip 8a becomes extremely high, the chip life is shortened, and chips are not removed well. In such a case, it is difficult for the method using a general cooling nozzle to sufficiently supply the cooling liquid due to the shavings of the chips.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and can improve the service life of a cutting edge, improve machining accuracy, reduce manufacturing costs, improve maintainability, and the like. It aims to provide turning tools.

[0005]

According to the present invention, there is provided a turning tool having a cutting edge provided at a tip end portion of a tool main body, wherein the tool main body is provided with a protruding portion projecting from a rake face of the cutting blade, A cover member having a jaw and a groove connected to the inside of the jaw, the periphery of the groove is brought into contact with the tool body, and the jaw is detachably provided in a state where the flank of the cutting blade is desired; An ejection hole that opens toward the rake face of the cutting blade is formed in the protruding portion, and between the jaw and the tool body, opens toward the flank of the cutting blade and opens into the groove. An outlet communicating with the outlet is formed, and the tool main body is formed with a flow passage communicating the outlet and the outlet with the coolant supply unit.

[0006]

According to the turning tool having the above configuration, at the time of cutting, a sufficient coolant is supplied from the ejection holes and the ejection ports to the rake face and the flank of the cutting blade, thereby suppressing the temperature rise of the cutting blade. In addition, the removal of chips is promoted.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The cutting edge support structure of the turning tool according to the present embodiment is the same as that of the above-described conventional turning tool.
Is provided with a lever member 16 having a substantially L-shape, and by tightening a clamp screw 18, a throw-away tip (cutting blade) 24 mounted on a tip seat 20 via a sheet member 22. Is fixed.

In the turning tool of this embodiment, the indexable insert 24
A protruding portion 26 protruding above the rake face 24a is formed.
Is detachably provided.

The projecting portion 26 is formed with a substantially elliptical ejection hole 30 which opens toward the rake face 24a of the throw-away tip 24 (FIG. 1). The shape of the ejection hole 30 is such that the coolant can be supplied to a portion extending over the width h1 in FIG.

As shown in FIGS. 5 to 10, the cover member 28 has a substantially flat plate shape, and has a jaw 31 having a rectangular cross section at a corner thereof, and an upper portion thereof. , A trapezoidal groove 32 extending continuously inside the jaw 31 is formed. Further, through holes 34 extending in the thickness direction are formed at two places of the cover member 28.

On the other hand, on the lower side of the tool body 14, FIG.
As shown in FIG. 5, a cutout 36 for fitting the cover member 28 is formed. A screw hole 38 is formed in the notch 36 at a position corresponding to the through hole 34, and a flow path 40 communicating with the ejection hole 30 is formed. The position of the opening of the channel 40 into the notch 36 is
As shown in FIG. 3, it is located at a position communicating with the groove 32.

A notch 42 is formed at a corner of the tool body 14 corresponding to the jaw 31. Between the cut 42 and the jaw 31, a flank 24 b of the throw-away tip 24 is formed. A spout 44 (FIG. 4) that opens toward it is formed. The shape of the jet port 44 is such that the cooling liquid can be supplied to a portion extending over a range r1 in FIG. 1 and a range r2 in FIG. Also, the tool body 14
On the side opposite to the side on which the chip seat 20 is formed,
Supply port 4 for connecting the coolant supply section 46 with the flow path 40
8 are formed.

The cover member 28 is detachably fixed to the notch 36 of the tool main body by a bolt (not shown) which penetrates the through hole 34 and is screwed into the screw hole 38. In this state, the cover member 28 The upper surface of the groove is in close contact with the lower surface of the notch 36 without any gap.
1 is communicated.

In the turning tool according to the above configuration, a coolant such as water supplied from the coolant supply section 46 and passed through the supply port 48 and the flow path 40, and one of the rake faces 24 a of the throw-away tip 24 is supplied from the ejection hole 30. And the other is ejected from the ejection port 44 through the groove 32 toward the flank 24b. By performing the cutting while maintaining this state, the temperature rise of the indexable insert 24 during cutting is suppressed, the life of the cutting edge is extended, and the machining accuracy is improved.

Further, according to the turning tool as described above, the flow path 40 of the tool body 14 can be easily formed, and the manufacturing cost can be reduced. Further, when foreign matter or the like accumulates in the flow path 40, the cover member 28 can be removed and easily removed, so that maintainability can be improved.

Further, by replacing the cover member 28 with one having a different shape of the jaw 31, it is possible to adjust the jetting direction and jetting pressure of the coolant.

It is needless to say that the turning tool according to the present invention is not limited to one having a structure in which the cutting blade is fixed by using the lever member as described above.

[0018]

As described above, according to the turning tool of the present invention, the coolant is supplied from the ejection holes and the ejection ports to the rake face and the flank face of the cutting edge, and the cutting edge of the cutting edge at the time of cutting is provided. The temperature rise can be suppressed, and the life of the cutting edge and the processing accuracy can be improved. In addition, the flow path of the tool body can be easily formed, and the manufacturing cost can be reduced. Further, even if foreign matter or the like accumulates in the flow path, the cover member can be easily removed by removing the cover. Can be improved.

[Brief description of the drawings]

FIG. 1 is a side view of a turning tool according to an embodiment of the present invention.

FIG. 2 is a plan view of the turning tool of FIG. 1;

FIG. 3 is a front view of the turning tool of FIG. 1;

FIG. 4 is an enlarged view of a portion A in FIG. 1;

FIG. 5 is a plan view of a cover member.

FIG. 6 is a side view of the cover member of FIG. 5;

FIG. 7 is a sectional view taken along line VII-VII of FIG. 5;

8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a sectional view taken along line IX-IX of FIG. 6;

FIG. 10 is a perspective view showing a structure for attaching a cover member to a tool body.

FIG. 11 is a plan view showing an example of a conventional turning tool.

FIG. 12 is a side view of the turning tool of FIG. 11;

FIG. 13 is a front view of the turning tool of FIG. 11;

[Explanation of symbols]

 14 Tool Main Body 20 Projection 24 Cutting Blade 28 Cover Member 31 Jaw 30 Spout Hole 32 Groove 40 Flow Channel 44 Spout 46 Coolant Supply

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B23B 27/10

Claims (1)

(57) [Claims] 1. A turning tool in which a cutting edge is provided at a tip portion of a tool main body, wherein the tool main body is provided with a protruding portion projecting from a rake face of the cutting blade, and a jaw and an inner side of the jaw. A cover member having a groove portion continuous with the cutting member, the periphery of the groove portion being brought into contact with the tool main body, and the jaw portion being detachably provided in a state in which a flank of the cutting blade is desired. An ejection hole that opens toward the rake face is formed, and an ejection port that opens toward the flank face of the cutting blade and communicates with the groove is formed between the jaw and the tool body, A turning tool, wherein the tool main body is formed with a flow path that communicates the jet hole and the jet port with a coolant supply unit.