JPH077072Y2 - Corner change machine for throw-away inserts for cutting tools - Google Patents

Description

[Detailed Description of the Invention] "Industrial application field" The present invention is to temporarily remove the throw-away tip attached to the cutter body of a cutting tool such as a milling cutter from the cutter body, and change the posture and re-attach it. The present invention relates to a corner change machine for changing a cutting edge corner used for cutting.

“Prior Art” Conventionally, a milling cutter as shown in FIGS. 5 to 7 has been widely used. In the milling cutters shown in these figures, a square plate-shaped throw-away tip (hereinafter abbreviated as a tip) 3 is attached to a tip mounting seat 2 provided on the peripheral edge of a disc-shaped cutter body 1 having a boss. The side surface in the thickness direction is brought into close contact with the bottom surface 2a of the tip mounting seat 2, the corner 3a thereof is projected toward the front surface side of the cutter body 1 to be positioned at a reference position, and further, the wedge 4 is screwed onto the cutter body 1. The tip 3 is clamped and fixed between the wedge 4 and the side surface 2b of the tip mounting seat 2 by tightening the bolt. The corner 3a of the tip 3 is used to cut a work material (not shown).

By the way, in the above-mentioned milling machine, the chip 3
Not only is it necessary to accurately position the chip 3 when mounting the chip on the mounting seat 2, but also the wedge 4 must be firmly screwed to the cutter body 1.

Therefore, it is not efficient to manually perform such a chip mounting operation for all of a large number of chips 3 because it requires a great deal of time and labor.

Therefore, as a device capable of automatically positioning and mounting the chip 3 on the cutter body 1, a chipset machine as shown in FIG. 4 has been put into practical use.

This conventional chipset machine will be described. In FIG. 4, reference numeral 5 is a base, 6 is a support base for supporting the cutter body 1, 7 is a positioning means for positioning the chip 3, and 8 is a wedge 4. Is a nut runner for fixing the tip 3 to the cutter body 1 by screwing the to the cutter body 1.

The support base 6 supports the cutter main body 1 substantially horizontally by being held by the adapter 9 and the pressing plate 10, and by operating the handle 11, the support base 6 can be moved horizontally in the X direction in the drawing. In addition, the supported cutter body 1 can be rotated by a predetermined angle in a horizontal plane.

Further, the positioning means 7 is provided on the base 5 so as to be movable in a direction orthogonal to the plane of the drawing, and is supported by the base 12, the guide portion 13 standing on the base 12, and the guide portion 13 so as to be able to move up and down. Lifting table 14, a hydraulic cylinder 15 fixed downward on the lifting table 14, and a tip 3 to be mounted below the hydraulic cylinder 15 and mounted on the operating rod 16 of the hydraulic cylinder 15.
And a hydraulic cylinder 17 for pushing it obliquely upward toward the (reference axis). This positioning means 7
After fixing the operating rod 16 of the hydraulic cylinder 15 so that the position of the tip (lower end) thereof is the position of the upper end of the tip 3 to be mounted, the tip 3 is pushed diagonally upward by the hydraulic cylinder 17. Actuating rod at its upper end
The tip 3 is pressed against the tip to accurately position the tip 3.

Further, the nut runner 8 is rotatably supported by the positioning means 7 so as to be rotatable in the vertical plane, and can be moved forward and backward so as to be separably contactable with the cutter body 1. The screw for fixing the wedge 4 to the cutter body 1 can be tightened and loosened by rotating the wrench 18 attached to the tip portion in both forward and reverse directions.

In the chipset machine configured as described above, the chip 3 is positioned by the positioning means 7 as described above, and then the wedge 4 is screwed to the cutter body 1 by the nut runner 8 to fix the chip 3 to the cutter. The cutter body 1 is clamped with respect to the body 1, and then the cutter body 1 is rotated by the support base 6 so that the other chips 3 are similarly rotated.
All the tips 3 can be automatically attached to and removed from the cutter body 1 by doing so.

[Problems to be solved by the invention] By the way, in the above-mentioned milling machine, when the corner 3a used for cutting the tip 3 is worn or chipped, the tip 3 is once removed from the cutter body 1 and its posture The other corners that have not been used are projected to the front side of the cutter body 1 to be reattached, that is, the corner of the tip 3 is changed.

However, the above-mentioned conventional chipset machine cannot perform such a corner change. Therefore, even if the above-mentioned chipset machine is used, the corner change work still has to be performed manually by a worker. Therefore, not only can work efficiency not be improved sufficiently, but also a worker must loosen the screw that fastens the wedge 4, so a large amount of force is required at that time, and the moment the screw is loosened. There is also a concern that the body may be adversely affected because it receives a large impact force.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an apparatus capable of automatically performing a corner changing operation of a chip.

[Means for Solving the Problems] The corner change machine of the throw-away tip in the cutting tool of the present invention has a side surface of a tip mounting seat recessed in the peripheral edge of the cutter body and a tip fixing screwed to the cutter body. A corner change machine that changes a cutting edge corner used for cutting by rotating a throw-away tip, which is sandwiched by a member and fixed to the cutter body, in a gap between the side surface and the tip fixing member. There is a supporting means for supporting the cutter body, a screwdriver for loosening or tightening a screw for screwing the chip fixing member to the cutter body, and a throw-away chip for fixing the chip to the side surface of the chip mounting seat. A corner changing means for rotating the member within a gap between the member and
Further, the corner changing means is a first member that is in contact with a portion on the bottom surface side of the tip mounting seat on the outer circumference of the throw-away tip, and an outer circumference of the throw-away tip that is the throw-away tip and the first member. The throwaway tip is engaged with a portion facing a portion where the first member abuts, the throwaway tip is sandwiched together with the first member, and the throwaway tip is moved relative to the first member. A second member that rotates starting from a portion that contacts the first member, and a rotation of the throw-away chip that contacts the throw-away tip that is rotated by the first and second members. A third member for stopping the displacement and positioning the throw-away tip at a predetermined position of the tip mounting seat.

[Operation] In the corner change machine for the throw-away tip of the cutting tool of the present invention, the first member is brought into contact with the outer periphery of the throw-away tip on the bottom side of the tip mounting seat, and the second member Is engaged with a portion of the outer periphery of the throw-away tip opposite to the portion where the first member abuts the throw-away tip, so that the throw-away tip is sandwiched between the first member and the second member. .

In this state, the screw fixing the tip fixing member to the cutter body is loosened by using the screwdriver so that the throw-away tip can be rotated in the gap between the side surface of the tip mounting seat and the tip fixing member. And second
By relatively displacing the member with respect to the first member, the throw-away tip is rotated about the contact portion with the first member as a starting point.

The third member comes into contact with the rotated throw-away tip to stop its rotational displacement, and positions the throw-away tip at a predetermined position on the tip mounting seat.

In this state, by tightening the screw for screwing the tip fixing member to the cutter body using the screwdriver, the throw-away tip is clamped by the side surface of the tip mounting seat and the tip fixing member and fixed to the cutter body, The corner chain is completed.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. The corner change machine of this embodiment has the same support as that of the conventional chipset machine described above. It has a base (supporting means) and a nut runner (screw driving means), and a corner changing means is mounted on the base 5 in place of the positioning means. Therefore, FIGS. 1 to 3 show only the corner changing means which is the main part of this embodiment, and the same components as those of the conventional chipset machine are not shown and their detailed description is omitted.

In FIG. 1, reference numeral 5 is a base, 6 is a support, and 8 is a nut runner, all of which are configured similarly to those in a conventional chipset machine, and reference numeral 20 denotes a positioning means 7. It is a corner change means provided instead.

The corner chain means 20 is adjacent to the support base 6 and
With respect to the cutter body 1 which is provided upright on the upper side of the support portion 21 and which is provided substantially horizontally on the upper end portion of the support portion 21 with its tip facing the support base 6 side and is supported substantially horizontally on the support base 6. Hydraulic cylinder 22 having a rod (second member) 22a that can be separated and contacted by two, and two hydraulic cylinders 23, 23 provided upward for moving the hydraulic cylinder 22 up and down. A rod (third member) 24 that is provided obliquely upward on the side of the support base 6 and that can be brought into and out of contact with the cutter body 1
The main components are a hydraulic cylinder 24 having a and a hydraulic cylinder 25 having a rod (first member) 25a which is arranged on the lower side of the hydraulic cylinder 24 and which can also be brought into contact with and separated from the cutter body 1. .

The lower end portion of the support portion 21 is detachably fixed to the base 5 by operating the handle 26. The support portion 21 is divided into an upper member 21a and a lower member 21b, and the upper member 21a is rotatably connected to the lower member 21b by a shaft 27 as shown in FIG. The upper member 21a can be rotated in the left-right direction in FIG. 2 by a slight angle (about 5 °) with respect to the vertical as required. This is done because there are right-handed and left-handed mounting states of the tip 3 on the cutter body 1, and both cases are supported.

A mounting base 30 is fixed to the upper end of the supporting portion 21, the base ends of the hydraulic cylinders 23 and 23 are fixed to the upper surface thereof, and the rods 23a and 23a of the hydraulic cylinders 23 and 23 have L-shaped cross sections. The mounting base 31 of is fixed, and the hydraulic cylinder 22 is mounted on the mounting base 31 substantially horizontally.
The hydraulic cylinder 22 is moved up and down by operating 3,23. On the lower surface of the rod (second member) 22a of the hydraulic cylinder 22 on the tip side, a V-groove shaped engaging portion 32 that can engage with the corner of the tip 3 is formed.
Reference numeral 33 is a guide rod for guiding the movement of the rod 22a.

Further, the hydraulic cylinders 24 and 25 described above are respectively provided with the support portion 21.
Mounting base fixed so as to project rearward from the side of
Are fixed in a state where their tip ends are directed obliquely upward, and the tip surface of the rod (third member) 24a of the hydraulic cylinder 24 is a flat surface, and the rod (first member) 25a of the hydraulic cylinder 25 is The upper surface of the tip end of is a flat inclined surface.

The operation of the corner change machine having the above structure will be described with reference to FIG.

First, from the standby state shown in (a), the hydraulic cylinder 22 is operated to move the rod 22a forward, and the hydraulic cylinders 23, 23 are operated to lower the rod 22a.
The engaging portion 32 is engaged with the corner 3a of the tip 3 so that the tip 3 is slightly pressed against the tip mounting seat 2 from above. At the same time, the hydraulic cylinders 24 and 25 are operated to move the rods 24a and 25a together and move the rod 2
The tip of 5a is brought into contact with another corner 3b of the tip 3 located on the mounting seat 2 side, and the tip of the rod 24a is positioned slightly rearward of the tip of the rod 25a. As a result, the chip 3 is held between the rod 22a and the rod 25a from above and below.

Then, the nut runner 8 (not shown in FIG. 3) is moved forward to insert the wrench 18 into the screw tightening the wedge 4, and the screw is slightly loosened so that the tip 3 can be moved. At this time, since the tip 3 is held between the rod 22a and the rod 25a, the tip 3 does not fall off the mounting seat 2.

Then, the hydraulic cylinder 22 is operated to retract the rod 22a leftward in the drawing. Thereby, the engaging portion 32 of the rod 22a
Although the upper side of the chip 3 engaged with is moved to the left in the figure, the rod 25a is in contact with the lower part of the chip 3 and the movement of the lower side is restricted, so the chip 3 is positioned at the lower part. Rolling around the corner 3b as a fulcrum by about 90 °, it rolls down on the inclined surface of the tip of the rod 25a, and is supported from below by the tip of the rod 24a as shown in (c),
Stop there.

Therefore, when the hydraulic cylinder 24 is operated to move the rod 24a forward, the tip 3 is pushed forward in the same posture as shown in (d) and slides on the upper surface of the tip of the rod 25a to attach the tip. The unused corner 3c is guided to the seat 2 and protrudes forward. Then, by tightening the screw with the nut runner 8 to fix the wedge 4,
The corner change for this chip 3 is completed.

Subsequently, the rod 24a and the rod 25a are both retracted to return to the standby state shown in (a), the support base 6 is driven, and the cutter body 1 is rotated to move the adjacent chip mounting seat 2
The other tip 3 mounted on the
To the position in front of, and this time, change the corner for the chip 3 by the same procedure,
Repeat for.

When the corner change for all the chips 3 is completed, the cutter body 1 is transferred to the chip set machine shown in FIG. 4, and the chips 3 are accurately positioned by the procedure described above, and finally the cutter body 1 is finally moved. All work is completed by clamping.

It should be noted that the above work procedure is based on a program preset in a control device (not shown)
By operating 2,23,24,25, the support base 6, and the nut runner 8, it is possible to easily and completely automate.

As explained above, by using the above-mentioned corner change machine, it is possible to realize the automation of the corner change work of the tip, which had to be done manually by the worker in the past, and therefore the work efficiency is greatly improved. In addition to being able to do so, it is possible to save labor, and therefore, the worker can be relieved from the work that is monotonous and requires a large amount of force.

In the above description, only the corner change is performed by the apparatus of the present embodiment, and thereafter, the accurate positioning of the chip 3 and the final clamping with respect to the cutter body 1 are performed by the conventional chip set machine. Even without using the set machine, the corner change machine of this embodiment can perform not only the corner change machine but also the chip positioning and final clamping.

That is, prior to pushing out the tip 3 rolled by the rod 22a by the rod 24a and returning it to the tip mounting seat 2, the rod 22a is rapidly advanced and returned to the position shown in (b), and the tip 3 is pushed by the rod 24a. The rod 22a
When the tip 3 is pressed against the engaging portion 32, the tip 3 automatically returns to the position before the corner change, so that the tip 3 is automatically positioned at the same time as the corner change machine. At this time, if necessary, hydraulic cylinder 2
Operate 3,23 to adjust the position (height) of the rod 22a,
It is also possible to adjust or correct the position of the tip 3 when reattaching.

Alternatively, the corner changing unit 20 and the positioning unit 7 (fourth unit) in the conventional chipset machine are mounted on the base 5.
(See the figure)
After the corner change is performed by the above-mentioned method, the support base 6 is rotated to guide the corner-changed chip 3 to the front of the positioning means 7, and then the positioning means 7 is used for accurate positioning and re-mounting. Is also possible. In that case, the nut runner 8 may be provided separately for each of the corner changing means 20 and the positioning means 7, but one nut runner 8 is provided so as to be movable and the tip 3 is finally attached when the corner is changed. It can also be configured to be used as both when it is attached to the.

Further, in the above embodiment, the rods 25a, 22a, 24a of the hydraulic cylinders 25, 22, 24 are used as the first to third members, but the hydraulic cylinders are not the only means for driving the rods. Instead, various drive sources such as various actuators can be adopted.

Further, the corner change machine of the above-described embodiment is applied to a milling cutter using square flat plate shaped chips, but the shape of the chips is arbitrary and, for example, a triangular shaped chip can also be applied. However, it is possible to apply not only to the milling cutter but also to other cutting tools by appropriately changing the position and operating direction of each member, the shape of the support base, and the like.

[Effect of the device] Since the corner change machine of the throw-away tip for the cutting tool of the present invention is configured as described above, it is screwed to the side surface of the tip mounting seat recessed in the peripheral edge of the cutter body and the cutter body. The throw-away tip, which is clamped by the tip fixing member and fixed to the cutter body, is rotated in the gap between the side surface of the tip mounting seat and the tip fixing member without dropping, and its cutting edge corner is moved. You can change. As a result, it is possible to realize the automation of the corner change work of the tip, which had to be done manually by the worker in the past, and therefore, the work efficiency can be greatly improved and the labor can be saved. It has an excellent effect.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention.
FIG. 1 is an elevational view of a main part, FIG. 2 is a view taken along the line II-II of FIG. 1, and FIGS. 3 (a) to 3 (d) are views showing a state in which a corner change is performed in the order of steps. is there. FIG. 4 is an elevational view showing the overall schematic configuration of a conventional chipset machine. 5 to 7 show a milling machine, FIG. 5 is a partial plan view thereof, FIG. 6 is a view taken along the line VI-VI of FIG. 5, and FIG.
The figure is a view taken along the line VII-VII in FIG. 1 ... Cutter body, 2 ... Tip mounting seat, 3 ... Throw-away tip, 3a ... One corner, 3b, 3c ... Other corners, 4 ... Wedge, 6 ... Support base (supporting means), 8 ……
Nut runner (screw driver), 20 ... Corner changing device, 21 ... Support, 22 ... Hydraulic cylinder, 22a ... Rod (second member), 23 ... Hydraulic cylinder, 24 ... Hydraulic cylinder, 24a ...... Rod (third member), 25 …… hydraulic cylinder, 25a …… Rod (first member), 32 …… engagement part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sadayuki Yanase 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (56) References Japanese Patent Publication No. 56-52682 (JP, B2) Japanese Patent Publication No. 56-52683 (JP, B2)

Claims (1)

[Scope of utility model registration request] 1. A throw-away tip that is fixed to the cutter body by being sandwiched by a side surface of a tip mounting seat that is recessed in the peripheral edge of the cutter body and a tip fixing member that is screwed to the cutter body. A corner change machine that changes a cutting edge corner used for cutting by rotating in a gap between a side surface and the tip fixing member, the supporting means supporting the cutter body, and the tip fixing member. And a corner changing means for rotating the throw-away tip within a gap between the side surface of the tip mounting seat and the tip fixing member. The corner changing means includes a first member that is in contact with a bottom surface side portion of the tip mounting seat on the outer periphery of the throw-away tip; An outer periphery of the throw-away tip, a portion of the throw-away tip where the throw-away tip and the first member abut each other are engaged with each other to sandwich the throw-away tip together with the first member, and A second member that is displaced relative to the first member to rotate the throw-away tip about a portion in contact with the first member as a starting point; and the second member is rotated by the first and second members. A cutting tool, comprising: a third member that abuts on the throw-away tip to stop the rotational displacement of the throw-away tip and positions the throw-away tip at a predetermined position of the tip mounting seat. Corner change machine for throwaway chips.