JPS62188617A - Setting mechanism for cutter body and arbor in cutting tool - Google Patents

Abstract

PURPOSE:To make a cutter body and an arbor from jolting with each other during operation, by making each incline installed in both sides strongly contact with each other with screws at the time of attaching them, in case of an inserted milling cutter or the like. CONSTITUTION:An arbor A is provided with an internal thread 3 at the center of a lower end face in the longitudinal axial direction, installing an incline 4 in an outer circumference of this lower end face, and it is formed into a cylindrical form. And, a cutter body B is provided with an inverted truncated conic concavity part 6 having an incline 5 on the outer circumference at the center of the top, installing an external thread 7 projectingly in the center of a bottom surface of this concavity part 6, and it is formed into a disk form. And, the internal thread 3 of the arbor A is screwed in the external thread 7 of the cutter body B, and the arbor A is clamped to the cutter body B in the state both these inclines 4 and 5 are made contact thereto. In this connection, the more these treads 7 and 3 tighten, the more they come tight, so that the lower end of the arbor A is entered and fitted tight to the concavity part 6 of the cutter body b, thus the arbor A can be clamped yet stronger.

Description

[Detailed Description of the Invention] The present invention relates to a cutter body and an arbor of a cutting tool, in which an arbor is firmly attached to a cutter body to which a chip is fixed, in a blade milling cutter or the like. This relates to the mounting mechanism.

(Prior Art) Conventionally, cutting tools such as implanted blade milling cutters used for surface cutting etc. have been used with an arbor a attached to the cutter body for fixing the chip.

That is, as shown in FIGS. 14 and 15, the lower end horizontal surface of the arbor a overlaps the upper end horizontal surface of the cutter body, and the pin groove 28.
With the pin p held between the pins 30 and 30, the pin e inserted through the center of the lower part of the cutter body screwed the ar μa, and the arbor a was attached to the cutter body.

In this way, since the arbor a is attached to the cutter body with the horizontal planes stacked on top of each other and the bin p sandwiched between them, there is a drawback that the two may wobble during use and the fixation of the two is not strong. Ta.

(Problem that the invention attempts to solve) The purpose is to firmly fix the cutter body and arbor.

(Means for Solving the Problems) The attachment mechanism between the cutter body and the 7-bar of the cutting tool according to the present invention has the following configuration.

A female screw 3 is carved in the center of the lower end surface in the longitudinal direction, and a cylindrical 7-bar A is formed with an inclined surface 4 on the outer periphery of the lower end.

A disc-shaped cutter body B is formed by providing an inverted truncated cone-shaped recess 6 having an inclined surface 5 on the outer periphery at the center of the upper surface, and having a male screw 7 protruding from the center of the bottom surface of the recess 6.

Then, the female screw 3 of the arbor A is screwed onto the male screw 7 of the cutter body B, and with the inner inclined surface 4.5 in contact with the male screw 7,
A 7-bar A is fixed to a cutter body B.

(Example) As shown in FIGS. 1 to 4, the attachment mechanism of the cutter body and arbor of the cutting tool according to the present invention is such that an inclined surface 4 is provided on the outer periphery of the lower end of the arbor A, and an inclined surface 4 is provided at the center of the upper surface of the cutter body B. To,
The arbor A is fixed to the cutter body B with a concave portion 6 having an inverted truncated conical shape having an inclined surface 5 and with the inner inclined surfaces 4 and 5 in contact with each other.

Arbor A is as shown in FIGS. 1 and 882.

A female screw 3 is carved in the vertical axis direction at the center of the lower end surface of a large diameter portion 2 provided concentrically at the bottom of the cylindrical small diameter portion l, and this large diameter portion 2
A sloped surface 4 with a smooth surface is provided on the outer periphery of the lower end.

The cutter body B is, as shown in FIGS. 3 and 4,
A concave portion 6 in the shape of an inverted truncated cone having a smooth inclined surface 5 on the outer periphery is provided at the center of the upper surface, a male screw 7 is provided protruding from the center of the bottom surface of this concave portion 6, and a mounting groove 8- to which the support C is attached is provided. is carved in a substantially Y shape on the lower surface, a centering column 10 is attached to the center of the surface with a port 9, a fixing screw hole 11 is provided diagonally from the outer peripheral wall to the mounting groove 8, and near the circumferential outer end surface of the mounting groove 8. A notch 12 is provided in the.

The mounting groove 8 is formed by opposing walls, one of which is the wall 14 .

Next, a method of using the attachment mechanism of the cutter body and arbor of the cutting tool according to the present invention will be explained.

Screw the female screw 3 of the arbor A into the male screw 7 of the cutter body B, bring the slope 4 of the arbor A into contact with the slope 5 of the cutter body B, and connect the tip of the arbor A to the inverted truncated cone of the cutter body B. The cutter body B is fitted into the recessed part 6 of the shape.
Attach arbor A firmly to

After this, the rod part 17 of the support C with the tip D fixed thereon is inserted into the mounting groove 8 of the cutter body B from the contact surface 18, and this contact surface 18 is brought into contact with the centering post 10, and the support C The support C is fixed in the mounting groove 8 of the cutter body B by turning the fixing screw 15 until the pawl 18 comes into contact with the locking hole 20 of the cutter body B.

In the same manner, insert the other supports C into each mounting groove 8, and align the contact surface 18 of each support C with the centering post lO so that each chip D is located at the same distance from the center of the cutter body B. Then, place each support C on the shoulder 8 of the cutter body B, and place it on the 5th Z as shown in FIG.

The cutting tool A μA is attached to a chuck portion E of a milling cutter body, etc., and used in the state shown in FIG. 6.

Here, the support C has a rod portion 17 as shown in FIG.
A diagonal contact surface 18 is provided at one end, and a head 19 for fixing the chip D is provided at the other end.

As shown in FIG. 7, the rod portion 17 has a contact surface 18 inclined in the width direction at the left end, a locking hole 20 provided approximately in the center of the upper surface, and a sliding surface 21 inclined to slightly widen the hem. is formed on the bottom surface.

As shown in FIGS. 6 and 7, the head 19 is equipped with a mounting rod F having an eccentric ratio shaft 23 at its tip so as to be rotatable diagonally with respect to the head 19. is rotated to press and fix the chip D to the stepped wall 22 of the head 19 of the support C in a detachable manner.

As described above, as shown in FIG. Therefore, even if the fixing screw 15 loosens a little, the support C will not fall from the mounting groove 8, making it safe.

Furthermore, as shown in FIG. 5, the inclined contact surface 18 of the support C is brought into contact with the centering post 10 at the rear of the line connecting the center of the cutter body B and the tip D. The force applied to the tip D during cutting is dispersed to the support C and the cutter body B, so that no unreasonable force is applied to the tip D, the durability of the tip D is improved, and a cleanly finished cutting surface can be obtained.

In addition, in the above embodiment, there is an inclined surface 4 on the outer periphery of the lower end of the arc μA.
Although the example in which the slope 5 is provided on the outer periphery of the concave portion 6 of the cutter body B has been described, as shown in FIG.
An inclined surface 4 may be provided on the inner periphery of the lower end of the female screw 3 of A, and an inclined surface 5 may be provided at the base of the male screw 7 of the cutter body B.

In the above embodiment, an example was explained in which the male screw 7 was provided protruding from the cutter body B to which the centering post 10 was attached with the port 9.
As shown in the figure and FIG. 10, the arm μA is screwed onto the port G with a hexagonal hole inserted into the cutter body B, and the centering post in the above embodiment is attached to the head 31 of the port G with a hexagonal hole. It may also have the functions of 10.

That is, as shown in FIG. 9, the arbor A has a female screw 3 carved in the center of the lower end surface in the longitudinal axis direction, protrusions 24 protruding from the lower end surface, and an inclined surface 4 provided on the outer periphery of the lower end. form.

As shown in FIG. 1θ, an inverted truncated cone-shaped recess 6 having an inclined surface 5 on the outer periphery is provided at the center of the upper surface, a mounting hole 25 is bored at the center of the bottom, and a small A cutter body B having a fitting hole 26 is formed.

Then, the protrusion 24 of the AR μA was fitted into the fitting hole 26 of the cutter body B, and with the inner inclined surface 4.5 in contact with each other, it was inserted from the lower side of the mounting hole 25 of the cutter body B. The cutter body B and the arbor A may be firmly fixed by screwing the arμA into the hexagonal hole port G.

Here, the reason why the protrusion 24 of the arbor A and the fitting hole 26 of the canter body B are fitted is to prevent rotation error between the cutter body B and the ar μA, and in addition, The lower end may be formed into a substantially truncated pyramid shape, and the concave portion 6 of the cutter body B may be formed into an inverted truncated pyramid shape, and this rotation prevention means is not particularly limited.

In the above embodiment, the cutter body B is provided with the male screw 7, and the arm μA is provided with the female screw 3. However, as shown in FIGS. 11 to 13, the cutter body B is provided with the female screw 2.
8 may be provided with a male screw 27 in μA.

That is, in the AR μA, a male screw 27 having a centering post 10 at the tip is integrally provided at the center of the lower end surface provided with the inclined surface 4.

The cutter body B has a female screw 28 at the center of the bottom surface, an inverted truncated cone-shaped concave portion 6 with an inclined surface 5 on the outer periphery at the center of the upper surface, a mounting groove 8 carved in a substantially Y shape on the lower surface, and an outer periphery. A fixing screw hole 11 is provided diagonally from the wall to the mounting groove 8.
A notch 12 is provided near the outer end surface of the circumference.

Then, with the cutter body B and the inner slope 4.5 of the 7-pa A in contact with each other, screw the male screw 27 of AμA into the female screw 28 of the cutter body B from the top side, and then B and μA may be firmly fixed.

In the above embodiment, at the lower part of the cylindrical small diameter section 1.

Although the explanation has been made using an example of A μA in which the large diameter portion 2 is provided concentrically, the shape may be simply cylindrical or prismatic, and the shape is not particularly limited.

In the above embodiment, the cutter main body B is provided with three mounting grooves 8. However, the present invention is not limited to three mounting grooves, and any number of mounting grooves 8 may be provided.

In the embodiment, by the mounting rod F attached to the support C;
Although the example in which the chip D is fixed has been described, the chip D may be fixed to the support C by a known means such as screwing with a bolt.

In the above embodiment, an example was explained in which the support C to which the tip D was fixed was attached to the attachment 8118 of the cutter body B, but this could be done by a known means such as 1jlIR using a bolt.

The tip D may be directly fixed to the cutter body B.

(Operations and Effects of the Invention) The attachment mechanism for the cutter body and the bar 7 of the cutting tool according to the present invention has the above-mentioned configuration, and is provided on the inclined surface 4 provided at the lower end of the arm μA and on the upper surface of the cutter body B. Since the arm μA is fixed to the cutter body B in a state where the lower end of the arm μA is in contact with the inclined surface 5, the lower end of the arm μA is fitted into the recess 6 of the cutter body B, and the screw cannot be tightened. The more you tighten it, the lower end of μA will become more
This allows the A μA to be more firmly fixed to the cutter body B.

The attachment mechanism of the cutter body and the arm μ of the cutting tool according to the present invention has the above-mentioned configuration, and the inclined surface 4 provided at the lower end of the arm μA is connected to the inclined surface 5 provided on the upper surface of the cutter body B. Fix the 7-bar A to the cutter body B in the state where it is in contact with the
The more the screw is tightened, the more the lower end of A μA will fit into the recessed part 6 of cutter body B, so A μA can be more firmly fixed to the cutter body B, and will not rattle each other during use. It is.

The attachment mechanism of the cutting tool cuff main body and the arm μ according to the present invention has the above-mentioned configuration, and the inclined surface 4 provided at the lower end of the arm μ A and the inclined surface 5 provided on the upper surface of the cutter body B. Since the 7-bar A is fixed to the cutter body B in the state of contact, the 7-bar A can be attached and fixed to the cutter body B with higher precision.

[Brief explanation of drawings]

Fig. 1 is a partially omitted longitudinal cross-sectional view showing the attachment mechanism of the main body of the cutting tool according to the present invention and the 7-bar, and Fig. 2 is a partially omitted longitudinal cross-sectional view showing a partially cutaway cross section of the arμ according to the present invention. Front view, 3rd
4 is a bottom view of the cutter body according to the present invention, and FIG. 5 is a support body with a chip fixed to the cutter body according to the present invention. FIG. 6 is an explanatory diagram of the cutter body equipped with the attachment mechanism according to the present invention and a partly omitted explanatory diagram of the ARμ in use, and FIG. 7 is an explanatory diagram of the support body to which the tip according to the present invention is fixed. An explanatory diagram, FIG. 8 is a partially omitted vertical cross-sectional view showing the attachment mechanism of the cutter body and the 7-bar of another cutting tool according to the present invention, and FIG. 9 is a cutter body of another cutting tool according to the present invention, and FIG. 7-A partially omitted vertical cross-sectional view showing the attachment mechanism of the bar, and FIG. 10 is a cross-sectional view of the cutter body related to the attachment mechanism of FIG. 9. The figure is a partially omitted sectional view showing the attachment mechanism of the cutter body and the arm μ of another cutting tool according to the present invention, and FIG. 12 is a front view including a partially cutaway cross section of the arm μ related to the attachment mechanism of FIG. 11. , FIG. 13 is a front view including a partially cutaway cross section of the cutter body of the attachment mechanism of FIG. 11, and FIG. 14 is a partially omitted vertical sectional view showing the attachment mechanism of the cutter body and 7-bar of the conventional cutting tool. , FIG. 15 is a partially omitted side view showing the attachment mechanism of the cutter body and the armature of the conventional cutting tool shown in FIG. 14. A・・・・・・・A μ B・・・・・・・・・
Cutter body C...Support D...
・・・・・・Chip E・・・・・・Chuck part
F...Mounting rod G...Hexagon socket head bolt a...Ar μ b...
Cutter body d...Tip e...
・・・・・・Bolt P・・・・・・・Pinto・・・・・Small diameter part 2・・・・・・・Large diameter part 3・・・・・・Female screw 4・・・・・・
・・Slope surface 5・・・・Slope surface 6・・・・
...Concave portion 7 ...Male screw 8
......Mounting groove 9...Porto 10
......Centering post 11...Fixing screw hole 12...Notch 13...
・Vertical wall 14...Sliding wall 15...
...Fixing screw 16...Pole 17...Rom 18...
...Abutting surface 19...Head 2o
......Locking hole 21...Sliding surface
22・・・・・・・・・Step wall 23・・・・・・・・・
Upper shaft 24...Protrusion 25...
...Mounting hole 26...Fitting hole 2
7... Male screw 28...
・Female screw 29...Pin groove 30...
...Pin groove 31...Head

Claims (1)

[Claims] 1. An inclined surface 4 is provided at the lower end of the arbor A, a recessed portion 6 having an inclined surface 5 is provided at the center of the upper surface of the cutter body B, and both inclined surfaces 4 and 5 are in contact with each other. , a cutter body and arbor attachment mechanism of a cutting tool in which arbor A is fixed to cutter body B. 2. The arbor A has a female screw 3 carved in the longitudinal axis direction and a sloped surface 4 on the outer periphery of the lower end, and the cutter body B has a male screw 7 protruding from the center of the bottom surface and a sloped surface 5 on the outer periphery. A concave portion 6 in the shape of an inverted truncated cone is provided at the center of the upper surface, and when the female screw 3 of the arbor A is screwed into the male screw 7 of the cutter body B, and both inclined surfaces 4 and 5 are in contact with each other. , a cutter body and arbor attachment mechanism 3 of a cutting tool according to claim 1, in which an arbor A is fixed to a cutter body B; 4, the cutter body B has a mounting hole 25 in the center of the bottom surface, and a recessed part 6 having an inclined surface 5 on the outer periphery in the center of the top surface.
Screw the arbor A onto the hexagon socket head cap screw G inserted into the cutter body B with both inclined surfaces 4 and 5 in contact with each other.
A mechanism for attaching a cutter body and an arbor of a cutting tool according to claim 1, wherein the arbor A is fixed to the arbor A. 4. The arbor A has a male screw 27 integrally protruding from the center of the lower end surface having the inclined surface 4 on the outer periphery, and the cutter body B
However, a female screw 28 is provided in the center, and an inverted truncated conical recess 6 having an inclined surface 5 on the outer periphery is provided in the center of the upper surface, and the male screw 27 of the arbor A is screwed into the female screw 28 of the cutter body B. The cutter body and arbor attachment mechanism of a cutting tool according to claim 1, wherein the cutter body B and the arbor A are fixed with both inclined surfaces 4 and 5 in contact with each other.