JPS604642Y2 - Holder for throw-away bite - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a presser fitting for a throw-away cutting tool that has the effect of preventing chips from scattering.

2. Description of the Related Art Chips generated during metal cutting such as lathes accumulate, causing an increase in the temperature of a cutting machine, and impairing worker safety due to scattering of chips.

Particularly in recent years, as a result of the remarkable improvement in the performance of ceramic tools, there is a trend toward high cutting speeds and dry cutting. As the chips spread out and the chips themselves become even hotter, safety problems caused by flying chips are becoming more apparent.

Conventionally, an independent device for preventing scattering of chips has been reported in addition to a presser metal fitting.

However, due to the large size of conventional tools, they may not be usable depending on the cutting machine or the machine to be cut, or they may interfere with the work.

On the other hand, although improvements have been made to conventional presser metal fittings, such as adding chip breaker functions, no consideration has been given to preventing chips from scattering.

The inventors of the present invention believe that it is effective to install a scattering prevention device near where chips are generated in order to prevent chips from scattering without impeding work efficiency. The presser metal fitting of the present invention was completed after repeated research in order to provide a scattering prevention function to the presser metal fitting located nearby.

The presser metal fitting of the present invention consists of a base body attached to a throw-away tool and a guide section configured on the upper part of the base body, and the guide part has a portion projecting like a canopy from the front and one side of the presser metal fitting, This is a presser metal fitting for a throw-away bite, characterized in that the distal end of the portion protruding from the side has an end further protruding downward.

The presser metal fitting of the present invention is characterized by its guide portion that catches and guides chips flying from the tip of the cutting tool in one direction.

Therefore, scattering of chips can be prevented.

Furthermore, because the guide part is provided on the presser metal fitting that directly follows the indexable cutting tool, in other words, the distance from the tip of the cutting tool, which is the source of chips, to the guide part of the presser metal fitting is quite short, so that chips are The scattering range of chips is narrow until reaching .

Therefore, the scattering of chips to the worker is extremely rare, and the safety of the worker can be ensured.

Further, the guide portion of the presser fitting that catches and guides the chips scattered in the narrow area can also be small.

Therefore, there is no drawback that the guide portion impedes workability.

Embodiment 1 FIG. 1 shows a perspective view of a presser fitting a according to a first embodiment of the present invention.

This presser metal fitting a has a guide portion 2 shown in FIG. 3 on the upper part of a base body 1 shown in FIG.

This base body 1 is the same as a presser metal fitting used in a JIS 31 type indexable tool, which is known as a typical indexable tool currently in general use.

That is, the presser metal fitting a of the first embodiment uses a conventionally known presser metal fitting as the base body 1, and a guide portion 2 is combined on the upper part thereof.

As shown in Fig. 2, the base 1 has a trapezoidal shape of about 1 crrL on each side, and a chip breaker 1 is installed in the part corresponding to the front leg.
01 is integrally assembled, and a through hole 102 is provided in the center of the trapezoid from top to bottom.

The guide part 2 is about 11 mm thick! It is made of rlrL stainless steel plate and has parts 201 and 202 protruding from the upper surface of the base 1 at the front of the base 1 and on the right side in FIG. The tip thereof further forms an end portion 203 that is bent downward.

A through hole 204 is provided at the rear end of the guide portion 2 .

This through hole 204 forms a through hole with the through hole 102 of the base body 1.

As shown in FIG. 4, this holding fitting a is detachably fixed to a steel shank 3 with a bolt 5 as a holding fitting for the throw-away tip 4.

Note that a bottom plate 6 is normally used for the throw-away tip 4.

When fixing the presser metal fitting a to the shank 3, care must be taken to ensure that the guide portion 2 of the presser metal fitting a does not come into contact with the workpiece during cutting.

For this purpose, it is preferable that the portion 201 of the guide portion protruding forward from the upper surface of the base body 1 be located slightly behind the front end 401 of the indexable tip 4.

The relative position of the portion 201 with respect to the throw-away tip 4 can be changed by changing the size of the guide portion 2 or by adjusting its position with the bolt 5 when fixing the presser metal fitting a.

The length of the portion 202 protruding to the right side of the guide portion 2 is the length of the base 1.
It is convenient to use a width that is the same as or slightly smaller than the width of the .

Note that the downwardly bent end portion 203 may be bent so deep as to reach about half the height of the base 1 or so as to cover the base 1 and the throw-away tip 4 located below it.

The bending angle of the end portion 203 can be freely selected from vertical to an inclination of about 60' with respect to the vertical when the base 1 is located on a horizontal plane.

In this embodiment, since the guide portion 2 is made of a stainless steel plate, the bending angle of the end portion 203 can be easily changed using pliers or the like.

The presser metal fitting a attached to the shank 3 is fixed to, for example, a tool rest 6 of a lathe shown in FIG. 5, and used for cutting a workpiece 7.

FIG. 6 shows an enlarged partial perspective view of the cut portion of FIG. 5.

In FIG. 6, the workpiece 7 is rotating in the direction indicated by the arrow (the direction of movement of the portion facing the tool rest is from top to bottom).

On the other hand, the throw-away bite 4 is sent along with the shank 3 from right to left at a constant slow speed.

Due to this rotation of the workpiece 7 and the transfer of the throw-away cutting tool 4, the workpiece 7 is cut by the tip of the throw-away cutting tool 4.

The chips cut by the throw-away cutting tool 4 collide with the chip breaker 101 provided on the base 1 of the presser metal fitting a, are bent into small pieces, and are further broken into pieces by the chip breaker.
101 and collides with the guide part 201.

For this reason, the chips change their direction from the upward direction to the downward direction, and fall below the tool post without bouncing upward and scattering significantly.

Note that the chips that fly out in the direction of the rear end 203 collide with the end 203 and are prevented from flying backward.

Further, the chips that fly out in the front direction opposite to the end collide with the workpiece 7 and can be prevented from scattering.

Therefore, by using this presser metal fitting a, it is possible to prevent chips from scattering upward, sideways and backward, and the chips fall downward.

Therefore, there are no inconveniences such as danger or deterioration of workability associated with scattering of chips.

Using this clamp a, press the bar (cast iron J) by the method shown in Figure 5.
The solid line in FIG. 7 shows the area of the floor where chips were scattered when cutting IS Fe12) at a cutting speed of 600 m/min, depth of cut of 2TIrIIt1, and feed of 0.2 mm/time.

For reference, the broken line shows the range of the floor where chips were scattered when cutting was performed under the same conditions using a conventional presser metal fitting (substrate 1 only).

From this usage example, it can be seen that the presser fitting a of this example is highly effective in preventing chips from scattering.

In this embodiment, the base body 1 and the guide part 2 are assembled with the bolts 5 (FIG. 4), but the base body 1 and the guide part 2 may be welded and integrated.

Alternatively, instead of the base body 1, a chip breaker piece 103 and a presser fitting 104 shown in FIG. 8 may be used independently, or a ball lock type presser fitting 105 shown in FIG.
A conventionally known presser metal fitting such as the one described above can be used as the base body 1 of the presser metal fitting a of this embodiment.

Embodiment 2 A perspective view of a presser fitting according to a second embodiment of the present invention is shown in Fig. 10.
As shown in the figure.

This presser metal fitting is made by integrating the base body 11 and the guide portion 21.

A forwardly protruding portion 211 of the guide portion 21 is formed above the chip breaker 111 of the base 11, and a rightwardly protruding portion 212 is bent almost vertically and connected to the right side of the chip breaker 111 of the base 11. It is an integrated system.

Therefore, the presser metal fitting of this embodiment apparently has a recess formed in its front surface.

This presser metal fitting is also JIS similar to the presser metal fitting a of Example 1.
It can be used for a 31-inch throw-away bite, and works in the same way as a habo.

Embodiment 3 A perspective view of the presser fitting C which is the third embodiment of the present invention is shown in the 11th embodiment.
As shown in the figure.

This presser metal fitting C is JIS35! The same presser metal fitting used in the indexable cutting tool is used as the base body 12, and a guide portion 22 made of a stainless steel plate is integrally welded to the upper part of the base body 12.

This guide portion 22 has a portion 221 that protrudes from the front of the base body 12.
and a portion 222 that protrudes to the left side, an end portion 223 that further protrudes downward from the portion 222, and an end portion 224 that connects the portion 222, the end portion 223, and the left side wall of the base body 22.

The lowest ends of the end portions 223 and 224 are both located below the bottom of the base body 22, and are at the middle height of the throw-away cutting tool placed under this presser metal fitting C.

This presser fitting C has a steel shank 3 as shown in FIG.
JIS35 in 1! The throw-away cutting tool 41 is removably fixed by a bolt 51 as a holding fitting.

The state in which this shank 31 is used is shown in FIG. 13 as a main cutting part of the lathe.

In FIG. 13, the workpiece 71 rotates in the direction of the arrow, while the throw-away tool 41 is transferred together with the shank 31 from right to left at a constant slow speed, and due to these movements, the outer periphery of the workpiece 71 rotates in the direction of the arrow. 41.

JIS 35 Type Slow-Death Low-Away Bit 413 As shown in the figure, since cutting is performed at the corner of the bit 41, the cutting waste generated during cutting mainly passes over the corner of the bit 41 and scatters from left to right in the figure.

With this presser metal fitting C, the cutting chips scattered in the right direction are stopped by the end 223 of the guide part 22, by the parts 221 and 222 upwardly, and further by the end 224 towards the base of the shank 31. , respectively guided below the shank 31.

Note that in the direction of the tip of the shank 31 and in the direction in which the shank 31 moves (to the left in the figure), it collides with the workpiece 71 and is prevented from scattering.

Therefore, the presser metal fitting C of this embodiment can almost completely prevent cutting waste from scattering.

In addition, in order to demonstrate the scattering prevention effect of Suigami Emetal C, the first
Cutting a bar (JIS Fe12) using the method shown in Figure 3 at a speed of 100 to 1200 m/min and a feed of 0.05 to 0.4 TIr.
The scattering state of chips was examined b times at a depth of cut in the range of 0.5 to 4TIrIIt.

Note that the base 22 of this example is used as a presser fitting for comparison.
The chisel was used as a presser metal fitting.

The results showed that the chip scattering effect was remarkable within the above cutting condition range.

For reference, cutting speed 600m/min, depth of cut 2TIan
The solid line in FIG. 14 shows the area of the floor where chips were scattered when cutting was performed under the conditions of 1 feed, 0.2 rran, 7 times.

Furthermore, as a comparative example, the area on the floor where chips were scattered when a conventional presser metal fitting was used is shown by a broken line.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a presser fitting according to a first embodiment of the present invention;
FIGS. 2 and 3 are perspective views showing the base guide part, which is a component of the presser fitting shown in FIG. 1, and FIG. 4 is a partially cutaway perspective view showing the presser fitting shown in FIG. 1 attached to the shank. 5 is a plan view showing a typical lathe in which the presser metal fitting of the present invention is used, FIG. 6 is a partial perspective view showing the cutting state using the presser metal fitting shown in FIG. 1, and FIG. The figure shows the area of the floor where chips are scattered when the presser metal fitting shown in Fig. 1 is used, and Figs. 8 and 9 respectively show conventionally known presser metal fittings that can be used in place of the base body shown in Fig. 2. FIG. 10 is a partially cutaway sectional view showing the state of use of the second device of the present invention.
Fig. 11 is a perspective view of the presser fitting according to the third embodiment of the present invention, and Fig. 12 is a partially cutaway view showing the presser fitting shown in Fig. 11 attached to the shank. A perspective view, FIG. 13 is a partial perspective view showing the state when cutting using the presser metal fitting shown in FIG. 11, and FIG.
FIG. 2 is a diagram showing a floor area where chips are scattered when the presser metal fitting shown in FIG. 1 is used. In the figure, symbols a, b, and c indicate the presser fitting of the present invention, 1 indicates the base body, and 2 indicates the guide portion.

Claims (1)

[Scope of Claim for Utility Model Registration] A hold-down fitting for a throw-away tool consisting of a base to be attached to the throw-away tool and a guide section configured on the upper part of the base, and the guide section has an eave attached to the front and one side of the hold-down tool. 1. A presser metal fitting for a throw-away cutting tool, characterized in that the holding part has a portion projecting in the shape of a shape, and a tip end of the portion projecting to the side has an end bent further downward.