JPH11104902A - Turning tool with chip discharge mechanism - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To facilitate chip replacement for a casing. A casing (24) is provided on a cutting tool head (15) having a throw-away tip (18). Casing 24
Is a fixing portion 27 fixed to the cutting tool head and a clamp piece 40.
And a detachable plate portion 28. A clamp piece 40 is attached to the fixing portion 27 with a bolt 41, and a coil spring 42
To press the clamp piece 40 against the head of the bolt 41. The slot 37 and the contact portion 39 are formed in the ceiling plate 35 of the plate portion 28.
Is provided. The clamp piece 40 is inserted into the elongated hole 37, and the bolt 41 is tightened.
Press the inclined surface 39 at 0b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning tool such as a cutting tool provided with a chip collecting casing.

[0002]

2. Description of the Related Art A cutting tool provided with a chip discharging mechanism is disclosed in, for example, Japanese Utility Model Registration No. 2506665. As shown in FIG. 10, the cutting tool 1 is provided with a generally square-shaped throw-away chip 4 mounted on a concave chip mounting seat 3 provided on a cutting head 2a at the tip of the cutting tool body 2, as shown in FIG. A front cutting edge 6 and a horizontal cutting edge 7 are provided on a ridgeline of the upper surface 5 forming a surface. A substantially box-shaped casing 9 having a notch 8 with a slight gap c between itself and the upper surface 5 is provided at a position retracted inward from both cutting blades 6 and 7, and the casing 9 is provided with a flange 9a.
Are fixed to the tool body 2 with bolts 10. The casing 9 is connected to a suction device (not shown) via a bellows hose 11 on the upper surface. Then, when the work material is cut with the cutting tool 1 in a state where the suction device is operated, chips generated by the front cutting edge 6 and the horizontal cutting edge 7 as shown in FIG. Through the gap c with the casing 9
It is cut into the breaker groove on the upper surface 5 of the chip, and is sucked and collected through the bellows hose 11.

[0003]

In such a cutting tool 1, when the cutting edges 6, 7 of the indexable insert 4 are worn and the tip is to be replaced, the tip must be replaced without removing the bolt 10 and removing the casing 9. However, there is a disadvantage that the tip replacement operation is complicated. SUMMARY OF THE INVENTION In view of such circumstances, an object of the present invention is to provide a turning tool with a chip discharge mechanism that enables chip replacement without removing the entire casing.

[0004]

A turning tool with a chip discharging mechanism according to the present invention is characterized in that a casing having a plate portion with a gap provided between the rake face of a cutting blade and a fixed portion is attached to a tool body. In a turning tool with a chip discharge mechanism that is mounted and discharges chips generated by the cutting blade through the casing, a clamp member provided on a fixed portion is inserted into a hole of a plate portion, and the clamp member The plate portion is detachably fixed to the fixing portion. At the time of chip replacement, the plate portion can be removed from the fixing portion by loosening the clamp member and removing it from the hole. Then, after the chip replacement, the hole of the plate portion may be inserted into the clamp member, and the plate portion may be fixed by the clamp member.

Further, a contact portion is formed in the plate portion adjacent to a hole through which the clamp member can pass, and the clamp member has an unclamped state located in the hole and a clamped state for pressing the contact portion. You may make it selectable. By causing the clamp member to assume one of the unclamped state and the clamped state, the attaching / detaching operation of the plate portion can be performed. Also, at least one of the contact portion and the pressing portion of the clamp member that presses the contact portion has an inclined surface, and the plate portion is positioned and fixed by pressing the contact portion with the pressing portion of the clamp member. You may. By pressing the contact portion of the plate portion with the clamp member, the plate portion can be positioned and fixed with respect to the throw-away tip. The contact portion of the plate portion may be provided on the side opposite to the cutting blade with respect to the hole.

[0006]

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIGS. 1 is a plan view of a main part of a cutting tool according to an embodiment, FIG. 2 is a side view of the cutting tool shown in FIG. 1 when viewed from the direction of a transverse cutting edge, and FIG. 3 is a view of the cutting tool shown in FIG. FIG. 4 is a perspective view showing a state in which the casing is removed from the fixing portion of the cutting tool and turned over, and FIG.
FIG. 6A is a cross-sectional view taken along the line AA, FIG. 6A is a diagram illustrating a clamped state of a detachable portion, and FIG. 6B is a diagram illustrating an unclamped state. The cutting tool 13 shown in FIGS. 1 to 4 has, for example, an upper surface 16 of a cutting tool head 15 of a substantially quadrangular prism-shaped cutting tool body 14 protruding upward with respect to other portions of the cutting tool body 14, and moves from a base end to a tip end. The inclined surface is gradually inclined downward. A concave portion 17 is formed as a chip mounting seat at a tip corner portion of the upper surface 16 of the cutting tool head 15, and a substantially square plate-shaped throw-away tip 18 is fixed to the concave portion 17 by a screw or the like. The indexable insert 18 has a cutting edge in which two ridges of an upper surface 19 forming a rake face project outward from the cutting tool body 14, and a front cutting edge 20 projecting from a longitudinal end of the cutting tool body 14 to a lateral direction. The protruding transverse cutting edge 21 is provided.

On the upper surface 16 of the bite head 15, a casing 24 having a substantially closed rectangular tube shape is disposed with a lower opening 25 facing the chip upper surface 19. This casing 2
4 includes a fixing portion 27 and a plate portion 28 as shown in FIG. 4, and the fixing portion 27 has a cross section substantially L including thick two side walls 27a and 27b located on the opposite side to the front cutting edge 20 and the horizontal cutting edge 21. It is shaped like a letter and is fixed to the bite head 15 with, for example, two bolts 29, 29. Moreover, a through hole 30 is formed in one side wall 27 b of the fixing portion 27, and is connected to the hose fixing portion 31. A screw hole 32 for fixing the plate portion 28 is provided on the upper surface of the fixing portion 27. The plate portion 28 includes a front plate 33 along the front cutting blade 20,
A horizontal plate 34 along the horizontal cutting blade 21 and a ceiling plate 35
Are integrally formed. By attaching the plate portion 28 to the fixing portion 27, an opening portion 25 extending in the vertical direction is formed inside the casing 24 so as to face the chip rake face 19, and this is inserted into the through hole 30 extending in the lateral direction. Chips are sucked and collected from the through hole 30 via a suction hose and a suction device (not shown) of the hose fixing portion 31.

As shown in FIGS. 1 and 5, a long hole 37 is formed in the ceiling plate 35 of the plate portion 28 in a direction intersecting a diagonal line from the intersection of the front plate 33 and the horizontal plate 34. Provided engagement portion 50 is provided. In the engaging portion 50, the long hole 37 has a central portion 37 a which bulges in a circular shape, and a fan-shaped horizontal plane from one end of the long hole 37 toward the tip side (chip 18 side) on the upper surface of the ceiling plate 35. A concave portion 38 and a locking wall 38a are formed. Further, a contact portion 39 having a fan-shaped inclined surface in a plan view is formed from the other end of the long hole 37 to the base end side. Contact part 3
9 is inclined at an angle of, for example, 45 ° with respect to the upper surface of the fixing portion 27. The contact portion 39 may preferably be inclined gradually upward from the connection portion with the long hole 37 toward the other end. And
A substantially rectangular plate-shaped clamp piece 40 that can pass through the long hole 37
The lower surface of one end 40a is cut obliquely (for example, at an angle of 45 ° with respect to the upper surface of the fixed portion 27) to form a pressing portion 40b having an inclined surface shape. A bolt 41 is passed through the clamp piece 40, and the bolt 41
Through a central portion 37a of the fixing portion 27. Since a coil spring 42 (elastic member) is mounted on the bolt 41 in a compressed state between the fixed portion 27 and the clamp piece 40, the clamp piece 40 is pressed against the head of the bolt 41, and the rotation operation of the bolt 41 is performed. Clamp piece 40
Can follow. The clamp piece 40 and the bolt 41 constitute a clamp member.

Therefore, the bolt 41 is loosened and the clamp piece 4
By making 0 parallel to the long hole 37, the plate portion 28 can be removed (see FIG. 6A).
In a state where the long hole 37 is fitted in the clamp piece 40, if the bolt 41 is tightened and the clamp piece 40 is rotated in the same direction by following the clamp piece 40, the other end 40c of the clamp piece 40 rotates on the concave portion 38. The pressing portion 40b presses the contact portion 39 against one end 40a of the clamp piece 40 to press and fix the ceiling plate 35 to the fixing portion 27 (FIG. 6B). reference). Plate part 28 is fixed part 2
7, the front plate 33 is slightly (for example, about 0.6 mm) receded on the rake face with respect to the front cutting edge 20 of the throw-away tip 18 as shown in FIG. Numeral 34 is set back slightly (for example, about 0.6 mm) on the rake face with respect to the horizontal cutting edge 21 of the throw-away tip 18. Moreover, the front plate 33 and the horizontal plate 34 have a slight gap c with respect to the rake face 19, and chips are guided from the gap c into the opening 25.

Since the cutting tool 13 according to the present embodiment has the above-described configuration, the plate part 28 is mounted on the fixing part 27 by the clamp piece 40 and the casing 24 is provided on the cutting tool head 15. Thus, the work material is cut by the front cutting edge 20 and the horizontal cutting edge 21. For example, the front cutting edge 20
When cutting is performed at the cutting edge 20, the chips generated by the front cutting edge 20 travel on the chip rake face 19 and pass through the gap c, and the casing 2
Enter within 4. It is sucked and collected by a hose (not shown) through the opening 25 and the through hole 30 in the casing 24.

When the tip needs to be replaced due to wear of the cutting blade or the like, the ceiling plate 35 of the casing 24 is required.
, The bolt 41 is loosened and the clamp piece 40 is
7 (see FIG. 6A), the plate portion 28 can be removed without removing the bolt 41 or the clamp piece 40 from the fixing portion 27. After replacing the chip 18, the plate part 28 is mounted on the fixing part 27,
The long holes 37 are fitted into the clamp pieces 40 (see FIG. 6A). In this state, when the bolt 41 is rotated clockwise in a plan view and screwed into the screw hole 32, the clamp piece 40 follows and rotates, and the other end 40c of the clamp piece 40 is
It moves upward and comes into contact with the locking surface 38a to be stopped.
At one end 40a of the clamp piece 40, the pressing portion 40b pivots toward the base end of the cutting tool and contacts the contact portion 39 to press it. Thereby, the plate portion 2 including the ceiling plate 35
Reference numeral 8 denotes a tip which is slightly moved and fixed to the diagonal base end side of the rake face, and is positioned at a position where the front plate 33 and the horizontal plate 34 are slightly retracted from the front cutting edge 20 and the horizontal cutting edge 21 on the rake face. Is done. Thereafter, the bolts 41 are further tightened, so that the plate portion 28 is mounted on the fixing portion 27.

As described above, according to the present embodiment, the plate portion 28 can be easily attached and detached without removing the bolts 41 and the clamp pieces 40, and chip replacement and the like are easy.

In the above-described embodiment, the plate 2
8 is formed on the three surfaces of the ceiling plate 35 and the front and side plates 33 and 34, but is not limited to this. For example, in the case where the throw-away insert is cut in a triangular plate shape with one cutting edge, for example, the front plate 33 or the horizontal plate 3 is attached to the ceiling plate 35.
The plate portion may be formed by two surfaces provided with the plate 4. Also,
Regarding the engaging portion 50 of the ceiling plate 35, the concave portion 38 following the long hole 37 does not necessarily have to be provided. In this case, for example, as shown in FIG. 7, the other end 40c of the clamp piece 40 is formed to have a shorter dimension than the one end 40a,
It is sufficient to form a space at the other end 7 to allow the other end 40c to rotate.

In the embodiment, the pressing portion 40b and the contact portion 39 of the clamp piece 40 are both inclined surfaces, but it is sufficient that at least one of them is an inclined surface. For example, in FIG. 8, only the contact portion 39 is an inclined surface, and the pressing portion 40b is a corner. In the example shown in FIG. 9, the pressing portion 40b is an inclined surface, and the contact portion 39 is a step. Further, the present invention can be applied to not only a cutting tool but also a turning tool having various chip discharging mechanisms such as a boring bar.

[0015]

As described above, in the turning tool with a chip discharging mechanism according to the present invention, the clamp member provided on the fixing portion is inserted into the hole of the plate portion, and the plate portion is fixed to the fixing portion by the clamp member. Since the fixing member is detachably fixed, the plate portion can be easily attached and detached without removing the clamp member from the fixing portion, and operations such as chip replacement are easy. Further, at least one of the contact portion and the pressing portion of the clamp member that presses the contact portion has an inclined surface, and the plate portion is positioned by pressing the contact portion with the clamp member. By pressing the contact portion of the plate portion with the pressing portion of the member, the plate portion can be positioned and fixed with respect to the throw-away tip.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of a cutting tool according to an embodiment of the present invention.

FIG. 2 is a side view of the cutting tool shown in FIG. 1 as viewed from a direction of a transverse cutting blade.

FIG. 3 is a side view of the cutting tool shown in FIG. 1 as viewed from a front cutting edge.

FIG. 4 is a perspective view showing a state in which the casing is removed from the fixing portion of the cutting tool and turned over.

FIG. 5 is a sectional view taken along line AA of FIG. 1;

FIG. 6A is a diagram showing an unclamping state of a plate portion by a clamp piece, and FIG. 6B is a diagram showing a clamp state of the plate portion by a clamp piece.

FIG. 7 is a longitudinal sectional view showing a modified example of a clamp piece and an engaging portion of a plate portion.

FIG. 8 is a longitudinal sectional view showing a first modification of the pressing portion of the clamp piece and the contact portion of the plate portion.

FIG. 9 is a longitudinal sectional view showing a second modification of the pressing portion of the clamp piece and the contact portion of the plate portion.

FIG. 10 is a side view of a main part of a conventional cutting tool with a chip discharging mechanism as viewed from a lateral cutting edge direction.

11 is a cross-sectional view of a main part showing a cutting state of the cutting tool shown in FIG. 8 using a front cutting edge.

[Explanation of symbols]

 13 Byte 18 Throwaway Tip 20 Front Cutting Edge 21 Horizontal Cutting Edge 24 Casing 27 Fixed Part 28 Plate 35 Ceiling Plate 33 Front Plate 34 Horizontal Plate 37 Long Hole 39 Contact Part 40 Clamping Piece 40a Pressing Part 41 Bolt

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yasuhiro Fukuyoshi 1528 Nakashinda, Yokoi, Kobe-cho, Anpachi-gun, Gifu Prefecture Inside of Mitsubishi Materials Corporation Gifu Works (72) Inventor Keisuke Tamura 1st Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation

Claims (3)

[Claims] 1. A tool body comprising: a casing having a plate portion provided with a gap between the rake face of the cutting blade and a fixed portion attached to a fixed portion; and cutting chips generated by the cutting blade being passed through the casing. In a turning tool with a chip discharge mechanism adapted to discharge, a clamp member provided in the fixing portion is inserted into a hole of a plate portion, and the plate portion is detachably fixed to the fixing portion by the clamp member. A turning tool with a chip discharge mechanism. 2. A contact portion is formed in the plate portion adjacent to a hole through which the clamp member can pass, and the clamp member presses the contact portion in an unclamped state located in the hole. 2. The turning tool with a chip discharge mechanism according to claim 1, wherein the turning tool can selectively take a clamped state. 3. The contact portion and at least one of the pressing portions of the clamp member that presses the contact portion have an inclined surface, and the plate portion is pressed by pressing the contact portion with the pressing portion of the clamp member. 3. The turning tool with a chip discharge mechanism according to claim 2, wherein the turning tool is positioned and fixed.