JPS5823537Y2 - Chip clamping mechanism in cutting tools - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a clamping mechanism for a tip in a cutting tool.

2. Description of the Related Art In general, a chip clamping mechanism configured as shown in FIGS. 1 to 3 is known for cutting tools such as milling cutters.

That is, 1 is a disc-shaped milling cutter main body, and a chip mounting groove 2 is provided on the lower surface of the periphery thereof.

Receiving portions 7 and 8 for accommodating chips 5 and 6 are formed in mutually opposing side walls 3 and 4 of the chip mounting groove 2. As shown in FIG.

A wedge 9 is press-fitted between the chips 5 and 6 in the chip mounting groove 2, and the chips 5 and 6 are fixed in the housing portions 7 and 8, respectively.

The housing portion 7 is formed with wall surfaces 7a and 7b that come into contact with two adjacent circumferential sides of the tip 5 to restrict the attachment position of the tip 5 in the axial and radial directions of the milling cutter body 1. The portion 8 has wall surfaces 8a, 8 that come into contact with two adjacent circumferential sides of the tip 6 to restrict the mounting position of the tip 6 in the axial and radial directions of the milling cutter body 1.
b is formed.

Is the chip 5°6 connected to these walls? a, 7b, 8
The mounting position of the milling cutter body 1 in the axial and radial directions is regulated by a and 8b, and the milling cutter body 1 is fixed in position as shown in FIG.

In the figure, reference numeral 10 denotes a clamp screw, and the tip of its threaded portion 10a protrudes from a screw hole 11 provided in the wedge 9 and is screwed into a screw hole 12 provided in the chip mounting groove 2.

According to the above configuration, when the chips 5 and 6 are fixed in the housing parts 7 and 8 of the chip mounting groove 2 by the wedge 9, the chips 5 and 6 are stored in the housing parts 7 and 8, and one While simultaneously holding the circumferential side of the tip 5 in contact with the wall surfaces 7a, 7b of the accommodating section T and the circumferential side of the tip 6 in contact with the gun surfaces 8a, ab of the accommodating section 8 with one hand, clamp it with the other hand. screw 1
0 and insert the wedge 9 into the chips 5 and 6 of the chip mounting groove 2.
The chips 5 and 6 were simultaneously fixed in the accommodating portions 1 and 8 by press-fitting between them.

However, it is necessary to simultaneously hold the chips 5 and 6 with one hand while rotating the clamp screw 10 with the other hand, and the circumferential side of the chips 5 and 6 must be placed on the wall surface. a, 7b, 8a, 8
There is an inconvenience that the chips are clamped without contacting the tips 5 and 6, and in order to correct this, it is necessary to loosen the clamp screws 10 that have been tightened, and it takes time and effort to position the tips 5 and 6, which increases the time required for clamping. However, there were drawbacks such as poor operability.

The present invention has been developed in view of the above circumstances, and its purpose is to provide a tip clamping mechanism that requires no effort in positioning the tip and has good operability.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 4, the same parts as those shown in FIGS. 1 to 3 are denoted by the same reference numerals, and the explanation thereof will be omitted.

13 in the figure is a slit formed along the length direction from the tip surface of the wedge 9a.
The elastic portion 14 is integrally formed in a shape.

This elastic portion 14 is formed by a wedge 9a, as shown by a solid line in the figure.
It is positioned below the chip 6 in the figure so that the chip 61 is not pressed into contact with the chip 61 when it is press-fitted between the chips 5 and 6 to fix them.

A convex portion 15 is integrally formed on the side surface of the elastic portion 14, and when the wedge 9a is press-fitted between the chips 5.6 of the chip attaching groove 2a, the convex portion 15 comes into pressure contact with the wall surface 4 of the chip attaching groove 2a. Then, the wedge 9a is pressed against the wall surface 3 side of the chip mounting groove 2a.

As shown by the solid line in the figure, a wedge 9a is provided at a position below the accommodating portion 8 of the wall surface 4 of the chip mounting groove 2a facing the convex portion 15 of the elastic portion 14, that is, at an inner end position of the wall surface 4, as shown by the solid line in the figure. When press-fitting between 6 and fixing them, the inclined wall 16
The pressure contact between the convex portion 15 and the wall surface 4 is released through the elastic portion 1.
A notch 17 is formed in which 4 can fit.

Note that the wall surface 7c of the accommodating portion 7 and one side surface of the wedge 9a facing thereto are set substantially parallel, and the wall surface 8c of the accommodating portion 8 and the other side surface of the wedge 9a opposing this are set substantially parallel to each other. The chip 5 is connected to the wall 7c and the wedge 9a.
The chip 6 is sandwiched and fixed on one side of the wall 8c.
and is sandwiched and fixed to the other side of the wedge 9a.

Furthermore, there is a wedge 9a between the clamp screw 10, the screw hole 11a of the wedge 9a, and the screw hole 12a of the chip mounting groove 2a.
A clearance is formed so that when the tip is press-fitted between the chips 5 and 6, the tip is pressed against the side wall 3.

Next, insert the chips 5 and 6 into the chip mounting groove 2 using the wedge 9a.
The method of fixing it to the accommodating portion 7.8 of a will be explained.

First, after accommodating the chips 5 and 6 in the accommodating parts 7 and 8, respectively, use one hand to hold the circumferential side of the chip 5 on the wall 7 of the accommodating part 7.
While touching the clamp screws 1 and 7b, use your other hand to tighten the clamp screw 1.
Rotate 0.

Then, as shown by the imaginary line in FIG.
comes into pressure contact with the wall surface 4 of the chip mounting groove 2, causing the elastic portion 14 to bend, and at the same time, the wedge 9a is pressed against the wall surface 3 side of the chip mounting groove 2a, and one side surface of the wedge 9a presses against the side surface of the chip 5 facing the wedge 9a. The chip 5 is temporarily clamped within the housing part 7 by pressing.

At this time, the chip 6 is not fixed by the wedge 9a.

Once the chip 5 is temporarily clamped in the housing part T, the clamp screw 10 is further rotated with one hand while bringing the circumferential side of the chip 6 into contact with the wall surfaces 8a, 8b of the housing part 8 with one hand.

Then, as shown by the solid line in FIG.
is fitted into the notch 17 from the inclined wall 16 while being in pressure contact with the wall surface 4, the pressure contact with the wall surface 4 is released, and the elastic portion 14 is restored to its original state.

When the clamp screw 10 is further rotated in this state, the chips 5 and 6 are fixed in the accommodating parts 7 and 8, respectively, by the wedge effect of the wedge 9a.

In order to remove the chips 5 and 6 from the accommodating parts 7 and 8, it is sufficient to loosen the clamp screw 10, remove the threaded portion 10a from the threaded hole 12 of the chip mounting groove 2a, and pull out the wedge 9a.

At this time, the convex part 15 of the elastic part 14 comes into pressure contact with the inclined wall 16, the elastic part 14 is bent, and the convex part 15 comes off from the notch part 17 of the wall surface 4, so that the wedge 9a can be easily pulled out.

According to the embodiment described above, the chip mounting groove 2b
When press-fitting the wedge 9a between the chips 5 and 6 of the
The convex portion 15 formed on the elastic portion 14 of a is connected to the chip mounting groove 2a.
In order to temporarily clamp the chip 5 in the housing part T by pressing the wedge 9a against the side wall 4 of the chip mounting groove 2a, first, when the chip 5 is temporarily clamped, the circumferential side of the chip 5 is The wall of storage section 7? The chip 5 is positioned by making it come into contact with the walls 8a and 7b of the chip 6, and then the wedge 9a is press-fitted by rotating the clamp screw 10 while making the circumferential side of the chip 6 come into contact with the wall surfaces 8a and 7b of the accommodating part 8. tip 5
, 6 can be fixed, and the chip 5 can be fixed as before.
, 6 does not take much time to position, the clamping work time can be shortened, and the operability is good.

Further, after the wedge 9a is press-fitted between the chips 5 and 6 in the chip mounting groove 2a, the elastic part 14 fits into the notch 17 from the inclined wall 16 of the side wall 4, and the pressure contact between the elastic part 14 and the side wall 4 is released. , chip 5 due to the wedge effect of wedge 9a,
6 is firmly fixed.

According to the embodiment described above, the slit 1 is provided in the wedge 9a.
3 is formed and the elastic part 14 is integrally formed on the wedge 9a through this slit 13. Of course, it may also be formed on the body.

As explained above, according to the chip clamping mechanism of the present invention, when the wedge is press-fitted between the chips in the chip mounting groove, the tip of one side of the wedge other than the part that presses against the chip is pressed into the chip mounting groove. Since an elastic part is formed in pressure contact with one side wall of the wedge to press the wedge against the chip located on the other side wall side opposite to the one side wall, when fixing the chip to the chip mounting groove, one chip must first be fixed. Since the other chip can be fixed after temporary clamping, positioning of the chip does not require much effort, the clamping work time is shortened, and operability is improved.

In addition, at the inner end of one side wall of the chip mounting groove, there is a notch in which the elastic part fits when the wedge is press-fitted between the two chips. This has the advantage that the pressure contact between the elastic portion and one side wall is released, and the chip is firmly fixed in the chip mounting groove due to the wedge effect.

[Brief explanation of drawings]

Figure 1 is a front view showing the conventional configuration, Figure 2 is a bottom view of the same,
FIG. 3 is a schematic diagram showing the arrangement of chips, and FIG. 4 is an enlarged bottom view showing an embodiment of the present invention. 1...Holder body (milling cutter body), 2
a... Chip mounting groove, 3, 4... Side wall, 5, 6... Chip, 9a... Wedge, 14... Elasticity Part, 17...Notch part.

Claims (1)

[Scope of utility model registration request] In a chip clamping mechanism in which two chips are placed in a chip mounting groove formed in a holder body, and a wedge is press-fitted between the two chips to fix them, one side of the wedge is When the wedge is press-fitted between the two chips, the tip of the tip other than the part that presses against the chip is pressed against one side wall of the chip mounting groove, and the wedge is pressed against the other side wall opposite to the one side wall. A notch is formed at the inner end of one side wall of the chip mounting groove to accommodate the elastic part when the wedge is press-fitted between the two chips. A clamping mechanism for a tip in a cutting tool, characterized in that the tip is formed with a section.