JPS588401Y2 - Clamp type bite - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an indexable clamp type tool which is suitable for use mainly as a parting tool or a parting tool.

Conventionally, parting bits and grooving bits have been used with a tip brazed to the holder or blade type, but brazed bits could not be replaced when they wore out or broke. However, the blade type requires re-grinding when it wears out, but due to the shape of the cutting edge, re-grinding the blade requires skill, and there are problems such as a large number of man-hours for re-grinding. there were.

In addition, there are some types that first fix the tip to the tip holder and then attach the tip holder to the holder body, but this may cause wear of the tip,
If abnormal damage such as chipping occurs, there is a drawback that not only the chip but also the chip holder will be damaged, and furthermore, in the case of automatic cutting, damage is particularly likely.

This idea was designed to solve these problems.In addition to firmly fixing the tip directly to the holder body without using a tip holder, it also has multiple chip storage grooves in the longitudinal direction of the holder body. This invention relates to a clamp-type cutting tool that accommodates a spliced tip made by connecting individual tips together and that facilitates tip replacement.

Next, an embodiment of this invention will be described with reference to the drawings.

In FIGS. 1 and 2, a chip storage groove 4 extending in the longitudinal direction is provided on the side surface of the holder body 1, with both upper and lower walls forming a tapered surface 3 that widens toward the groove bottom 2.
A hole 5 is formed on the longitudinal center line of the chip storage groove 4 and opens to the bottom of the groove from the back side of the holder body, and the portion of the hole 5 that opens to the bottom of the groove has a slightly smaller diameter.
A steel ball 8 pushed by a bolt 7 via a spring 6 slightly protrudes from the groove bottom 2.

This steel ball will be referred to as a spherical projection 8.

A splicing chip 10 as shown in FIG. 3 is stored in this chip storage groove 4, and is firmly fixed by pressing the side surface with a member 9.

The spliced chip 10 has a plate shape as shown in FIG. A plurality of chips 10a are processed on the surface 11.
are integrally connected by a joint portion 12.

The splicing part 12 is provided with a scrap 13 that serves as a positioning surface when clamping the chip 10a, a notch 14, and a slotted part 15 following the notch, and the slotted part 15 is formed diagonally from both sides. It is processed so that it can be broken by hand at the thinner parts.

16 is a cutting edge. A hole 17 or a recess into which the spherical protrusion 8 of the holder body 1 can be held is provided in the center of the side surface of each chip 10a.

Also, for tightening, there are bolt holes 18 in the member 9 as shown in Fig. 4.
and a protrusion 19 are provided.

This protrusion 19 contacts the shoulder 13 of the tip 10a and functions to prevent the tip 10a from being pushed into the holder body during positioning cutting, but it is not necessary to provide it.

To fix the tip 10a to the holder body 1, tighten the hole in member 9). Loosen the tip 20, insert the spliced tip 10 into the tip storage groove 4, and press it with your hand from the rear (right side in the figure) to make it into a spherical shape. Because of its spherical surface, the projection 8 is pushed by the chip and pushed into the hole 5 against the spring 6, but when the hole 17 of the chip comes, it engages in the hole 17 and temporarily positions the chip. It will be fixed.

Next, tighten the tip 1 on the inside of the protrusion 19 of the member 9.
The eyebrows 13 of 0a are brought into contact with each other and the bolts 20 are tightened to permanently fix the parts.

Since the tip 10a has a length that takes into account the depth of cut, a stable and constant amount of protrusion can always be obtained, making it suitable for mass production.

When the cutting blade 16 wears out, loosen the screw 20 to release the tip 10a from the member 9, push the spliced tip by hand from the rear, and insert the spherical protrusion 8 into the next tip hole 17.
At the engaged position, the tip 10a is tightened by pressing the tip 10a from the side with a member.

Then, the worn tip is broken off by hand at the joint at the end of the slotted portion 15, and a new tip 10a is positioned at the front end.

The embodiment shown in FIG. 5 has two cutting edges 16a and 16b.
The splicing part 12 has notches 14 from above and below and is spliced near the center, and the splicing part 12 has a slotted part diagonally from the center toward the left and right chips. 15a and 15b are machined, and the tip and joint can be easily separated by hand, so even if the cutting edge 16a of the tip wears out, it can be easily replaced with the cutting edge 16b.

The reason why the slotted parts 15a and 15b are arranged on the left and right and the joint part can be bent on the left and right is because when setting the cutting blade 15b, if the joint part is on the cutting blade side, it will get in the way of cutting. It is designed so that it can be broken off by hand.

Even when the cutting blade 16b is used by cutting off the cutting edge at the front end and reversing the front and back, the remaining chips in the chip storage groove 4 are held in place by the spherical protrusion 8 in the hole 17 or recess of the chip. Therefore, there is no risk that the remaining chips will move in the chip storage groove 4 and fall off.

The tip at the front end is fastened by being pressed against the holder body 1 from the side by a member 9, and the upper and lower walls of the tip storage groove are single tapered surfaces, and the upper and lower edges of the tip are either single taper or double taper. Since the tip is in contact with the tapered surface 11 of the taper, when the tip is tightened by the member, it is held inward of the holder body and is firmly fixed.

In addition, since a plurality of tips 10a are connected together at the joint 12 and stored inside the holder body 1, unlike conventional clamp-type tools in which only one tip can be attached to the holder, it is easy to replace. There is no need to store the chip separately and it is convenient to replace it.

In addition, since the tip is directly fixed to the holder body without using a tip holder, the rigidity and holding power of the tip are strong, making it suitable for cutting thin walls.

It also has many advantages, such as even if abnormal wear or chipping occurs, only the chip will be damaged.

[Brief explanation of the drawing]

Fig. 1 is a side view of an embodiment of this invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Fig. 3A is a top view of a part of the spliced chip, and a side view of the same side. C is the bottom view of the same, No. 4
Figure A shows the front view of the tightening part, the opening is the right side view, C is the back view, and Figure 5 shows another embodiment of the splicing tip. FIG. 2 is a cross-sectional view taken along line BB of 1... Holder body, 2... Groove bottom, 3
...Tapered surface, 4...Chip storage groove, 6...Spring, 8...Spherical protrusion,
9...Tightening member, 10...Splicing chip, 10a...Tip, 11...
Tapered surface, 12... Joint portion, 14...
...Notch part, 15...Slotted part, 17...
····hole.

Claims (1)

[Scope of utility model registration request] A chip storage groove is provided on the side surface of the holder body, with both upper and lower walls forming tapered surfaces that widen toward the groove bottom, and a spherical protrusion that is biased by a spring and protrudes from the groove bottom on the longitudinal center line of the chip storage groove. A plate-shaped plate formed by connecting a plurality of chips together through a seam part consisting of a notch and a slotted part continuing to the notch in the longitudinal direction, with both upper and lower edges having tapered surfaces. The spliced chip is stored in the chip storage groove, the spherical protrusion is engaged with a hole or recess provided on the side surface of the chip, and the side surface of the frontmost chip is pressed and fixed to the holder body. is a clamp-type cutting tool characterized by having a member.