DE102017000784A1 - One-sided indexable insert with two clamping holes and cutting tool for it - Google Patents

Abstract

A cutting tool rotatable about a tool axis, comprising a cutter body and at least one one-sided indexable insert removably mounted in an insert receiving pocket of the cutter body. The cutting insert has an upper and an opposing lower surface with a peripheral side surface extending therebetween and a central axis passing therethrough. First and second clamping bores extend between the upper and lower surfaces and open outward therefrom. First and second primary cutting edges are formed at the intersection of the upper surface and the peripheral side surface. The lower surface has first and second annular recesses communicating with the first and second clamping bores, respectively, and first and second recess passages extending from the first and second clamping bores to the peripheral side surface, respectively. The first and second recess channels extend parallel to a first longitudinal plane containing the central axis. ()

Description

Field of the invention

The invention relates to an indexable cutting insert with two clamping bores and a cutting tool therefor for use in metal cutting operations in general and for high speed milling operations in particular.

Background of the invention

In the field of cutting tools used in high speed milling, there are many examples of indexable insert with two pinch holes removably retained in an insert pocket of a cutter body.

The FR 2837732 discloses a milling tool having a cylindrical cutter body with two grooves extending rearwardly from a front surface thereof, each groove having an insert receiving pocket with an indexable insert retained therein. Each cutting insert has an upper and an opposing lower surface with two clamping holes extending therethrough and a longitudinally extending channel formed in the lower surface. Two clamping screws extend through the two clamping holes, and each clamping screw engages a threaded hole in a seating surface of the insert receiving pocket. A radial inner side wall of the channel is clamped to a corresponding side surface of a shoulder formed on the seat surface.

The US 7,597,507 discloses a milling tool having a cylindrical cutter body with two grooves extending rearwardly from a front surface thereof, each groove having an insert receiving pocket with an indexable insert retained therein. Each cutting insert has an upper and an opposing lower surface with two clamping holes extending therethrough and circular recess portions formed at the openings of the clamping holes on the lower surface. Two clamping screws extend through the two clamping holes, and each clamping screw engages a threaded hole in a seating surface of the insert receiving pocket. Circular engaging projections are formed on the openings of the threaded bores on the seating surface, and the circular recess portions engage with the circular engaging projections.

It is an object of the invention to provide an improved indexable insert.

Another object of the invention is to provide an indexable cutting insert of reduced weight.

Another object of the invention is to provide an indexable cutting insert which can be manufactured efficiently.

Yet another object of the invention is to provide an improved cutting tool with an indexable insert which is particularly suitable for high speed milling operations.

Summary of the invention

• eine ebene Basisfläche,
• eine erste und eine zweite Ringaussparung, die mit der ersten bzw. zweiten Klemmbohrung kommunizieren, und
• einen ersten und einen zweiten Aussparungskanal, die sich von der ersten bzw. zweiten Klemmbohrung zur Umfangsseitenfläche erstrecken, wobei sich der erste und zweite Aussparungskanal parallel zu einer ersten Längsebene erstrecken, die die Mittelachse enthält.

According to the invention, there is provided a single-sided indexable cutting insert comprising: upper and opposing lower surfaces having a peripheral side surface extending therebetween and a central axis passing therethrough, the upper and lower surfaces having shapes different from one another;
first and second clamping bores extending between and intersecting the upper and lower surfaces, the first and second clamping bores having first and second bore axes, respectively; and
first and second primary cutting edges formed at the intersection of the top surface and the peripheral side surface;
the lower surface comprising:

• a flat base surface,
• a first and a second annular recess, which communicate with the first and second clamping bore, and
• a first and a second recess channel extending from the first and second clamping holes, respectively, to the peripheral side surface, the first and second recess channels extending parallel to a first longitudinal plane containing the central axis.

• einen Schneidkörper; und
• mindestens einen Wendeschneideinsatz der zuvor beschriebenen Art, der in einer Einsatzaufnahmetasche des Schneidkörpers entfernbar befestigt ist.

According to the invention, there is further provided a cutting tool rotatable about a tool axis, comprising:

• a cutting body; and
• at least one indexable cutting insert of the type described above, removably mounted in an insert receiving pocket of the cutting body.

list of figures

• 1 eine erste Perspektivansicht eines Schneideinsatzes gemäß einigen Ausführungsformen der Erfindung;
• 2 eine zweite Perspektivansicht des Schneideinsatzes gemäß 1;
• 3 eine Untersicht auf den Schneideinsatz gemäß 1 und 2;
• 4 eine Querschnittansicht des Schneideinsatzes gemäß 3 an der Linie IV-IV;
• 5 eine Querschnittansicht des Schneideinsatzes gemäß 3 an der Linie V-V;
• 6 eine Querschnittansicht des Schneideinsatzes gemäß 3 an der Linie VI-VI;
• 7 eine Perspektivansicht eines Schneidwerkzeugs gemäß einigen Ausführungsformen der Erfindung;
• 8 eine perspektivische Explosionsansicht des Schneidwerkzeugs gemäß 7;
• 9 eine Vorderansicht einer Einsatztasche des Schneidwerkzeugs gemäß 7, wobei ihr Schneideinsatz befestigt ist;
• 10 eine Vorderansicht der Einsatztasche des Schneidwerkzeugs gemäß 7, wobei ihr Schneideinsatz entfernt ist;
• 11a eine Querschnittansicht des Schneidwerkzeugs gemäß 9 an der Linie XI-XI bei Abwesenheit einer Radialauswärtskraft auf den Schneideinsatz;
• 11b eine Querschnittansicht des Schneidwerkzeugs gemäß 9 an der Linie XI-XI bei Vorhandensein einer ausreichend großen Radialauswärtskraft auf den Schneideinsatz; und
• 12 eine Querschnittansicht des Schneidwerkzeugs gemäß 9 an der Linie XII-XII.

For a better understanding, the invention will now be described, by way of example only, with reference to the accompanying drawings in which dotted lines represent cut-off boundaries for partial views of a component. Show it:

• 1 a first perspective view of a cutting insert according to some embodiments of the invention;
• 2 a second perspective view of the cutting insert according to 1 ;
• 3 a bottom view of the cutting insert according to 1 and 2 ;
• 4 a cross-sectional view of the cutting insert according to 3 on the IV-IV line;
• 5 a cross-sectional view of the cutting insert according to 3 on the line VV;
• 6 a cross-sectional view of the cutting insert according to 3 on the line VI-VI;
• 7 a perspective view of a cutting tool according to some embodiments of the invention;
• 8th an exploded perspective view of the cutting tool according to 7 ;
• 9 a front view of an insert pocket of the cutting tool according to 7 with its cutting insert attached;
• 10 a front view of the insert pocket of the cutting tool according to 7 with their cutting insert removed;
• 11a a cross-sectional view of the cutting tool according to 9 on the line XI-XI in the absence of a radial outward force on the cutting insert;
• 11b a cross-sectional view of the cutting tool according to 9 on the line XI-XI in the presence of a sufficiently large radial outward force on the cutting insert; and
• 12 a cross-sectional view of the cutting tool according to 9 on the line XII-XII.

Further description of the invention

The invention relates to an indexable cutting insert 20 according to 1 to 4 , which has an upper and an opposite lower end surface 22 . 24 with a peripheral surface extending therebetween 26 and a central axis A _C extending therethrough.

In some embodiments of the invention, the cutting insert 20 be turned around the central axis A _C.

Further, in some embodiments of the invention, the cutting insert 20 preferably by compression molding and sintering a cemented carbide, e.g. Tungsten carbide, and may be coated or uncoated.

Furthermore, in some embodiments of the invention, the lower surface 24 be rotationally symmetrical about the central axis A _C.

According extend according to 1 to 4 a first and a second clamping bore 28a . 28b between the upper and lower surface 22 . 24 and open to the outside.

In addition, according to the invention, a first and a second primary cutting edge 30a, 30b at the intersection of the upper surface 22 and the peripheral side surface 26 educated.

In some embodiments of the invention, the first and second primary cutting edges 30a . 30b be spaced.

Further, in some embodiments of the invention, the peripheral side surface 26 may include a first and an opposing second primary side surface 32a . 32b and a first and an opposite second secondary side surface 34a . 34b to have. The primary side surfaces 32a . 32b can last longer than the secondary sites 34a . 34b be.

In addition, in some embodiments of the invention, the first and opposite second primary side surfaces 32a . 32b the upper surface 22 cut to the first or second primary cutting edge 30a . 30b to build.

The upper and lower surfaces 22 . 24 have shapes that differ from each other, the bottom surface 24 has the only seat. Because no cutting edges at the intersection of the lower surface 24 and the peripheral side surface 26 are formed, the cutting insert 20 be referred to as "one-sided" or "irreversible".

According to the invention according to 1 to 4 the lower surface 24 a flat base surface 35 on.

In some embodiments of the invention, the base surface 35 be honed.

Further, in some embodiments of the invention, the base surface may be 35 be perpendicular to the central axis A _C.

In addition, in some embodiments of the invention, the base surface 35 at most two transversely spaced coplanar base part surfaces 35 ' . 35 " exhibit.

According to 2 and 3 can the bottom surface 24 a first and a second ring recess 36a . 36b have, with the first or second clamping hole 28a . 28b communicate. The clamping holes 28a . 28b have a first and a second bore axis A _B1 , A _B2 .

It should be understood that the use of the term "ring" throughout the specification and claims with respect to the first and second ring recesses 36a, 36b means that the first and second pinch holes 28a . 28b each communicating therewith, having a circular cross-section, and the outer peripheral shape of the first and second annular recess 36a . 36b not necessarily limited.

It should also be clear that the provision of the first and second ring recess 36a . 36b contributes to the overall weight of the cutting insert 20 which is of great importance in high-speed milling operations involving the cutting insert 20 exposed to high centrifugal forces.

In some embodiments of the invention, the first and second ring recesses 36a . 36b with the first and second clamping bore 28a . 28b be coaxial.

According to Fig. 3 to 6, the first and second ring recess 36a . 36b a first and a second bore narrowing section 40a . 40b the first and second clamping bore 28a . 28b at a first and second minimum bore diameter DB _MIN1 , DB _MIN2 intersect.

In some embodiments of the invention, the first and second ring recesses 36a . 36b a first and a second annular shoulder surface 38a . 38b and the first and second annular shoulder surfaces 38a . 38b may be the first and second bore narrowing section 40a . 40b to cut.

Further, in some embodiments of the invention, the first and second annular shoulder surfaces 38a . 38b coplanar and perpendicular to the central axis A _C.

In addition, in some embodiments of the invention, as shown in FIG 3 to 6 shown the first and second ring recess 36a . 36b a first and a second conical recess surface 42a . 42b and the first and second conical recess surfaces 42a . 42b can the base area 35 at a first and a second maximum recess _diameter DR _MAX1 , DR _MAX2 intersect.

_Additionally , in some embodiments of the invention, the first maximum _pocket diameter DR _MAX1 may be at least six-fifths of the first minimum bore diameter DB _MIN1 , and the second maximum _{pocket diameter} DR _MAX2 may be at least six-fifths of the second minimum bore diameter DB _MIN2 .

According to extend as in 2 and 3 shown, a first and a second recess channel 44a . 44b from the first and second clamping bore 28a . 28b to the peripheral side surface 26 ,

In some embodiments of the invention, the first and second recess channels 44a . 44b a first or a second investment wall 46a . 46b across the base area 35 exhibit.

Furthermore, in some embodiments of the invention, the first and second abutment walls 46a . 46b be polished and flat.

It should be clear that the provision of the first and second annular recess 36a, 36b, with the first and second clamping bore 28a . 28b communicate, advantageously, allows the cutting insert 20 in a single grinding gauge (not shown) for unobstructed grinding of the base surface 35 as well as the first and second plant wall 46a . 46b which improves manufacturing efficiency.

It should be _understood that for embodiments of the invention in which the first and second maximum _{relief diameters} DR _MAX1 , DR _{MAX2 are} at least six-fifths of the first and second minimum bore diameters DB _MIN1 , DB _MIN2, respectively, the total weight of the cutting _insert 20 is advantageously reduced.

In some embodiments of the invention, the first and second abutment walls 46a . 46b perpendicular to the base surface 35 be.

Furthermore, in some embodiments of the invention, the first and second recess channels 44a . 44b a first or a second non-investment wall 48a . 48b have, to the first and second investment wall 46a . 46b point.

In addition, in some embodiments of the invention, the first abutment wall 46a and first non-abutment wall 48a around a first flat channel bottom surface 50a be the second investment and second non-investment wall 46b . 48b can um a second level channel bottom surface 50b spaced apart, and the first and second channel bottom surfaces 50a, 50b may be coplanar and parallel to the base surface 35 be.

According to Fig. 5 and 6, the first and second recess channel 44a . 44b have first and second channel depths D _C1 , D _C2 in the measurement parallel to the central axis A _C , and the first channel depth D _C1 may be at least one-fifth of the first minimum bore diameter DB _MIN1 , and the second channel depth D _C2 may be at least one-fifth of the second minimum bore diameter DB _MIN2 .

According to extend as in 3 shown, the first and second recess channel 44a . 44b parallel to a first longitudinal plane P1 containing the central axis A _C.

In some embodiments of the invention, the first and second abutment walls 46a . 46b lie on opposite sides of the first longitudinal plane P1.

Furthermore, in some embodiments of the invention, as shown in FIG 5 and 6 shown the first and second investment wall 46a . 46b be spaced from the longitudinal plane P1 in each case by a first transverse distance D _L1 .

Furthermore, in some embodiments of the invention, as in FIG 3 shown the first and second investment wall 46a . 46b along the first longitudinal plane P1 be spaced from each other and lie on opposite sides of a second transverse plane P2, which contains the central axis A _C and is perpendicular to the first longitudinal plane P1.

Additionally, in some embodiments of the invention, the first and opposite second secondary side surfaces 34a . 34b cut the first longitudinal plane P1.

According to 4 to 6 can be a portion of a first contact axis A _A1 parallel to the first longitudinal plane P1 in the first bearing wall 46a may be contained, and a portion of a second bearing axis A _A2 parallel to the first longitudinal plane P1 may be in the second abutment wall 46b be included.

In some embodiments of the invention, the first and second abutment walls 46a . 46b be parallel to the first longitudinal plane P1.

According to Fig. 5 and 6, the first and second recess channel 44a . 44b have a first and a second channel width W _C1 , W _C2 .

In some embodiments of the invention, the first channel width W _{C1 may be} from the first abutment wall 46a to the first non-investment wall 48a can be measured transversely, and the second channel width W _C2 can from the second investment wall 46b to the second non-investment wall 48b be measured across.

Further, in some embodiments of the invention, the first and second channel width W _C1, W _{C2 may be} twice the first transverse distance D _L1 .

According to 4 to 6 can be a portion of the first contact axis A _A1 in the second non-conditioning wall 48b may be contained, and a portion of the second bearing axis A _A2 may be in the first non-investment wall 48a be included.

It should be clear that for embodiments of the invention in which the second non-investment wall 48b includes a portion of the first contact axis A _A1 and the first non-conditioning wall 48a includes a portion of the second abutment axis A _A2 , the first and second recess channel 44a . 44b can be made in a single grinding step.

According to FIGS. 3 to 6, the first and second bore axes A _B1 , A _{B2 can be contained} in the first longitudinal plane P1.

In some embodiments of the invention, the first and second bore axes A _B1 , A _{B2 may be} parallel and have a bore spacing D _S.

Further, in some embodiments of the invention, the first and second primary cutting edges 30a . 30b have a first and a second primary length L _P1 , L _P2 in the measurement parallel to the first longitudinal plane P1, and the first and second primary length L _P1 , L _P2 may each be greater than twice the hole spacing D _S.

In addition, in some embodiments of the invention, the first longitudinal plane P1 may not be the first and second primary cutting edges 30a . 30b to cut.

According to 2 and 3 forms the first recess channel 44a Part of a first cavity 52a in the lower area 24 , and the second recess channel 44b forms part of a second cavity 52b in the lower area 24 , The two cavities 52a . 52b are spaced from each other longitudinally and lie on opposite sides of the second transverse plane P2. Besides, every cavity is 52a . 52b asymmetric about the first longitudinal plane P1. No cavity 52a . 52b opens to a primary side surface 32a . 32b ,

It should be clear that the provision of the first and second cavity 52a 52b for reducing the total weight of the cutting insert 20 contributes, as already mentioned, in High-speed milling operations is very important in which the cutting insert 20 exposed to high centrifugal forces.

In some embodiments of the invention, the first cavity 52a a first cavity wall 54a have the first investment wall 46a points, and the second cavity 52b may be a second cavity wall 54b have, which points to the second investment wall 46b.

Furthermore, in some embodiments of the invention, the first cavity 52a to the first ring recess 36a adjoin, and the second cavity 52b can be attached to the second ring recess 36b adjoin.

According to 3 and 5 may be the first cavity 52a a first cavity width W _O1 in the measurement transversely from the first abutment wall 46a to the first cavity wall 54a to have.

According to 3 and 6 can the second cavity 52b a second cavity width W _O2 in the measurement transversely of the second abutment wall 46b to the second cavity wall 54b.

In some embodiments of the invention, the first cavity width W _O1 be greater than the first channel width W _C1, and the second cavity width W _O2 can be larger than the second channel width W to be _C2.

Furthermore, in some embodiments of the invention, the first cavity width W _{O1 may be} over 50% larger than the first channel width W _C1 , and the second cavity width W _O2 may be over 50% larger than the second channel width W _C2 .

According to 2 and 3 can the bottom surface 24 a third recess channel 44c have, extending from the first clamping bore 28a to the second clamping hole 28b extends.

It should be clear that the provision of the third recess channel 44c to reduce the overall weight of the cutting insert 20 which, as already mentioned, is very important in high-speed milling operations involving the cutting insert 20 exposed to high centrifugal forces.

In addition, it should be clear that for embodiments of the invention, the third recess channel 44c have, the base surface 35 two transversely spaced coplanar base sections 35 ' . 35 " Has.

In some embodiments of the invention, the third recess channel 44c a third and a facing fourth non-investment wall 56a . 56b exhibit.

Further, in some embodiments of the invention, a portion of the first abutment axis A _{A1 may be} in the third non-abutment wall 56a be included, and a portion of the second bearing shaft A can _A2 in the fourth non-conditioning wall 56b be included.

It should be clear that for embodiments of the invention in which the third non-investment wall 56a includes a portion of the first bearing axis A _A1 and the fourth non-investment wall 56b includes a portion of the second bearing axis A _A2, the third channel recess 44c can be made in the same single grinding step by the first and second recess channel 44a . 44b getting produced.

According to 7 to 10 The invention also relates to a cutting tool 58 Which is rotatable about a tool axis _T A, which is a cutting body 60 and at least one indexable insert 20 that's in a mission wallet 62 of the cutting body 60 is removably attached.

In some embodiments of the invention, the cutting body 60 be cylindrical, wherein it has a peripheral wall 64 has, which is between a front and a rear end face 66 . 68 extending in an anterior and an opposite reverse direction F _D , R _D , and the Einsatzaufhahmetasche 62 can in the peripheral wall 64 adjacent to the front end surface 66 be formed.

Further, in some embodiments of the invention, the insert receiving pocket 62 a flat seat 70 , a first support surface 72 across the seat 70 , a first and a second threaded hole 74a . 74b in the seat 70 and a hump 76 have that from the seat 70 protrudes.

Further, in some embodiments of the invention, the first support surface 72 pointing radially outwards.

Additionally, in some embodiments of the invention, the first support surface 72 may be the front end surface 66 to cut.

Furthermore, in some embodiments of the invention, the first support surface 72 may be elongate and extend along a support axis A _S.

According to 8th and 10 can be the first tapped hole 74a between the second threaded hole 74b and the hump 76 lie.

In some embodiments of the invention, the first and second threaded bores 74a . 74b have a first and a second thread axis A _T1 , A _T2 .

According to 8th and 10 can be the first tapped hole 74a before the second threaded hole 74b lie.

In some embodiments of the invention, the base surface 35 with the seat 70 in contact, and the first and second clamping screw 78a . 78b can pass through the first and second clamping holes 28a . 28b extend and threaded engagement with the first and second threaded holes 74a . 74b produce.

In a first turning position of the cutting insert 20 in the mission wallet 62 According to Fig. 7 to 9, the first and second threaded bore 74a . 74b in relation to the first or second clamping bore 28a . 28b be eccentric.

It should be clear that the eccentric relationship of the first and second tapping 74a . 74b in relation to the first and second clamping holes 28a . 28b a translational movement of the cutting insert 20 to the first support surface 72 when tightening the first and second clamping screw 78a . 78b promotes.

Furthermore, in some embodiments of the invention, the bump 76 in the first or second recess channel 44a . 44b he is an abutment surface 80 has, which points radially inward.

Additionally, in some embodiments of the invention, the stop surface 80 may be planar and perpendicular to the seat surface 70 be.

In the absence of a radial outward force F _R on the cutting insert 20 can in a cross section in a third plane P3 perpendicular to the tool axis A _T according to 11a the peripheral side surface 26 in contact with the first support surface 72 stand.

In some embodiments of the invention, the third plane P3 may be the peripheral wall 64 to cut.

Furthermore, in some embodiments of the invention, the third plane P3 may be the seat surface 70 to cut.

In addition, in some embodiments of the invention, the third plane P3 may be the first threaded bore 74a to cut.

According to 11a may be the first or opposite second primary side surface 32a, 32b with the first support surface 72 stay in contact.

In some embodiments of the invention, the first and opposite second primary side surfaces 32a . 32b a first and a second planar primary side wall 82a . 82b exhibit.

According to 11a can be the first or second primary sidewall 82a . 82b with the first support surface 72 stay in contact.

In some embodiments of the invention, the first and second primary sidewalls 82a . 82b be honed.

It should be clear that the first and second primary side wall 82a . 82b can be ground while the cutting insert 20 is incorporated in the single grinding gauge (not shown), which improves the efficient production.

Even in the absence of a radial outward force F _R to the cutting insert 20 can the hump 76 not with the cutting insert 20 stay in contact.

It should be clear that in the absence of a radial outward force F _R on the cutting insert 20 according to 11a a gap G between the first or second abutment wall 46a . 46b and the stop surface 80 can be present.

Furthermore, it should be clear that the gap G can be very accurate, since the first and second abutment wall 46a . 46b as well as the first and second primary sidewall 82a . 82b are ground, wherein the gap G may have a range between 0.05 to 0.20 mm.

It should also be clear that 11a shows the gap on an exaggerated scale to make the invention more understandable.

Furthermore, in the absence of a radial outward force F _R on the cutting insert 20 the first longitudinal plane P1 should be substantially parallel to the support axis A _S.

In the presence of a sufficiently large radial outward force F _R on the cutting insert 20 For example, during high-speed milling operations at over 30,000 revolutions per minute, the cutting insert may become 20 relocate until one of the first or second investment wall 46a . 46b Contact with the stop surface 80 and the cutting insert 20 through the cusp 76 according to 11b is supported radially.

Thus, it should be clear that in the presence of a sufficiently large radial outward force F _R on the cutting insert 20 according to 11b no gap between one of the first and second abutment walls 46a . 46b and the stop surface 80 can be present.

It should also be understood that for embodiments of the invention in which the first and second channel depths D _C1 , D _{C2 are} at least one-fifth of the first and second minimum bore diameters DB _MIN1 , DB _MIN2, respectively, for robust contact between the first or second abutment wall 46a . 46b and the stop surface 80 can be taken care of.

In addition, even in the presence of a sufficiently large radial outward force F _R on the cutting insert 20 in cross section in the third plane P3 according to 11b the peripheral side surface 26 not in contact with the first support surface 72 stand.

In addition, in the presence of a sufficiently large radial outward force F _R on the cutting insert 20 and in a cross section in each plane perpendicular to the tool axis A _T, the peripheral side surface 26 not in contact with the first support surface 72 stand.

According to 7 to 10 Can the insert receiving bag 62 a second support surface 84 across the seat 70 have, and one of the first or opposite second secondary side surface 34a . 34b can with the second support surface 84 stay in contact.

In some embodiments of the invention, the second support surface 84 from the first support surface 72 be spaced, and as shown in FIG. 10, the first and second support surface 72 . 84 form an acute outer pocket angle α1.

It should be clear that the second support surface 84 for radial support of the cutting insert 20 in the presence of a sufficiently large radial outward force F _R , since the outer pocket angle α1 is pointed.

In some embodiments of the invention, the pocket angle α1 may be less than or equal to 60 degrees.

Further, in some embodiments of the invention, the first and opposite second secondary side surfaces 34a . 34b a first and a second planar secondary sidewall 86a . 86b and one of the first or second secondary sidewall 86a . 86b can with the second support surface 84 stay in contact.

In addition, in some embodiments of the invention, the first and second secondary sidewalls 86a . 86b be honed.

It should be clear that the first and second secondary sidewall 86a . 86b can be ground while the cutting insert 20 is incorporated in the single grinding gauge (not shown), which improves the efficient production.

According to 10 . 11a and 11b can the hump 76 a radially outwardly facing non-stop surface 88 have that from the stop surface 80 points away, and the stop and Nichtanschlagfläche 80 . 88 may be spaced from each other by a second transverse distance D _L2 .

In some embodiments of the invention, the second transverse distance D _{L2 may be} greater than twice the first transverse distance D _L1 .

It should be understood that for embodiments of the invention in which the second transverse distance D _{L2 is} greater than twice the first transverse distance D _L1 , the first and second cavities 52a . 52b make up the extra space around the sturdy hump 76 accommodate.

According to 12 can the seat 70 define a fourth level P4.

In some embodiments of the invention, an imaginary line L may extend perpendicular to the fourth plane P4 between each point on the first and second ring recesses 36a . 36b and the fourth level P4 extend without another portion of the insert receiving pocket 62 to cut.

Although the invention has been particularly described to some extent, it should be understood that various changes and modifications might be made without departing from the spirit or scope of the invention as defined by the following claims.

1. 1. Einseitiger Wendeschneideinsatz (20), der aufweist:
   • eine obere und eine gegenüberliegende untere Fläche (22, 24) mit einer sich dazwischen erstreckenden Umfangsseitenfläche (26) und einer sie durchlaufenden Mittelachse (A_C), wobei die obere und untere Fläche (22, 24) Formen haben, die sich voneinander unterscheiden;
   • eine erste und eine zweite Klemmbohrung (28a, 28b), die sich zwischen der oberen und unteren Fläche (22, 24) erstrecken und sich daran nach außen öffnen, wobei die erste und zweite Klemmbohrung (28a, 28b) eine erste bzw. eine zweite Bohrungsachse (A_B1, A_B2) haben; und
   • eine erste und eine zweite Primärschneidkante (30a, 30b), die am Schnitt der oberen Fläche (22) und der Umfangsseitenfläche (26) gebildet sind;
   wobei die untere Fläche (24) aufweist:
   • eine ebene Basisfläche (35),
   • eine erste und eine zweite Ringaussparung (36a, 36b), die mit der ersten bzw. zweiten Klemmbohrung (28a, 28b) kommunizieren, und
   • einen ersten und einen zweiten Aussparungskanal (44a, 44b), die sich von der ersten bzw. zweiten Klemmbohrung (28a, 28b) zur Umfangsseitenfläche (26) erstrecken, wobei sich der erste und zweite Aussparungskanal (44a, 44b) parallel zu einer ersten Längsebene (P1) erstrecken, die die Mittelachse (AC) enthält.
2. 2. Schneideinsatz (20) nach Aspekt 1, wobei die Basisfläche (35) nicht mehr als zwei quer beabstandete koplanare Basisteilflächen (35', 35") aufweist.
3. 3. Schneideinsatz (20) nach Aspekt 1 oder 2, wobei die erste und zweite Bohrungsachse (A_B1, A_B2) in der ersten Längsebene (P1) enthalten sind.
4. 4. Schneideinsatz (20) nach Aspekt 3, wobei:
   • die erste und zweite Bohrungsachse (A_B1, A_B2) parallel sind und um einen Bohrungsabstand (D_S) voneinander beabstandet sind,
   • die erste und zweite Primärschneidkante (30a, 30b) eine erste bzw. eine zweite Primärlänge (L_P1, L_P2) in der Messung parallel zur ersten Längsebene (P1) haben und
   • die erste und zweite Primärlänge (L_P1, L_P2) jeweils größer als der doppelte Bohrungsabstand (D_S) sind.
5. 5. Schneideinsatz (20) nach einem der vorstehenden Aspekte, wobei:
   • der erste und zweite Aussparungskanal (44a, 44b) eine erste bzw. eine zweite Anlagewand (46a, 46b) quer zur Basisfläche (35) aufweisen,
   • ein Abschnitt einer ersten Anlageachse (A_A1) parallel zur ersten Längsebene (P1) in der ersten Anlagewand (46a) enthalten ist und
   • ein Abschnitt einer zweiten Anlageachse (A_A2) parallel zur ersten Längsebene (P1) in der zweiten Anlagewand (46b) enthalten ist.
6. 6. Schneideinsatz (20) nach Aspekt 5, wobei die erste und zweite Anlagewand (46a, 46b) senkrecht zur Basisfläche (35) sind.
7. 7. Schneideinsatz (20) nach Aspekt 5 oder 6, wobei die erste und zweite Anlagewand (46a, 46b) geschliffen und eben sind.
8. 8. Schneideinsatz (20) nach einem der Aspekte 5 bis 7, wobei die erste und zweite Anlagewand (46a, 46b) auf Gegenseiten der ersten Längsebene (P1) liegen.
9. 9. Schneideinsatz (20) nach einem der Aspekte 5 bis 8, wobei die erste und zweite Anlagewand (46a, 46b) voneinander längs beabstandet sind und auf Gegenseiten einer zweiten Querebene (P2) liegen, die die Mittelachse (A_C) enthält und senkrecht zur ersten Längsebene (P1) ist.
10. 10. Schneideinsatz (20) nach einem der Aspekte 5 bis 9, wobei:
    • der erste und zweite Aussparungskanal (44a, 44b) eine erste bzw. eine zweite Nichtanlagewand (48a, 48b) aufweisen, die zur ersten bzw. zweiten Anlagewand (46a, 46b) weisen,
    • ein Abschnitt der ersten Anlageachse (A_A1) in der zweiten Nichtanlagewand (48b) enthalten ist und
    • ein Abschnitt der zweiten Anlageachse (A_A2) in der ersten Nichtanlagewand (48a) enthalten ist.
11. 11. Schneideinsatz (20) nach einem der Aspekte 5 bis 10, wobei die untere Fläche (24) einen dritten Aussparungskanal (44c) aufweist, der sich von der ersten Klemmbohrung (28a) zur zweiten Klemmbohrung (28b) erstreckt.
12. 12. Schneideinsatz (20) nach einem der vorstehenden Aspekte, wobei die erste und zweite Ringaussparung (36a, 36b) einen ersten bzw. einen zweiten Bohrungsverengungsabschnitt (40a, 40b) der ersten bzw. zweiten Klemmbohrung (28a, 28b) an einem ersten bzw. einem zweiten minimalen Bohrungsdurchmesser (DB_MIN1, DB_MIN2) schneiden.
13. 13. Schneideinsatz (20) nach Aspekt 12, wobei:
    • die erste und zweite Ringaussparung (36a, 36b) eine erste bzw. eine zweite Ringschulterfläche (38a, 38b) aufweisen,
    • die erste und zweite Ringschulterfläche (38a, 38b) den ersten bzw. zweiten Bohrungsverengungsabschnitt (40a, 40b) schneiden; und
    • die erste und zweite Ringschulterfläche (38a, 38b) koplanar und senkrecht zur Mittelachse (A_C) sind.
14. 14. Schneideinsatz (20) nach Aspekt 12 oder 13, wobei:
    • der erste und zweite Aussparungskanal (44a, 44b) eine erste bzw. eine zweite Kanaltiefe (D_C1, D_C2) in der Messung parallel zur Mittelachse (A_C) haben und
    • die erste Kanaltiefe (D_C1) mindestens ein Fünftel des ersten minimalen Bohrungsdurchmessers (DB_MIN1) beträgt und die zweite Kanaltiefe (D_C2) mindestens ein Fünftel des zweiten minimalen Bohrungsdurchmessers (DB_MIN2) beträgt.
15. 15. Schneideinsatz (20) nach einem der Aspekte 12 bis 14, wobei:
    • die erste und zweite Ringaussparung (36a, 36b) eine erste bzw. eine zweite konische Aussparungsfläche (42a, 42b) aufweisen und
    • die erste und zweite konische Aussparungsfläche (42a, 42b) die Basisfläche (35) an einem ersten bzw. einem zweiten maximalen Aussparungsdurchmesser (DR_MAX1, DR_MAX2) schneiden.
16. 16. Schneideinsatz (20) nach Aspekt 15, wobei der erste maximale Aussparungsdurchmesser (DR_MAX1) mindestens sechs Fünftel des ersten minimalen Bohrungsdurchmessers (DB_MIN1) beträgt und der zweite maximale Aussparungsdurchmesser (DR_MAX2) mindestens sechs Fünftel des zweiten minimalen Bohrungsdurchmessers (DB_MIN2) beträgt.
17. 17. Schneideinsatz (20) nach einem der Aspekte 10 bis 16, wobei:
    • der erste Aussparungskanal (44a) Teil eines ersten Hohlraums (52a) in der unteren Fläche (24) bildet und der zweite Aussparungskanal (44b) Teil eines zweiten Hohlraums (52b) bildet; und
    • der erste Hohlraum (52a) eine erste Hohlraumwand (54a) hat, die zur ersten Anlagewand (46a) weist, und der zweite Hohlraum (52b) eine zweite Hohlraumwand (54b) hat, die zur zweiten Anlagewand (46b) weist.
18. 18. Schneideinsatz (20) nach Aspekt 17, wobei der erste Hohlraum (52a) an die erste Ringaussparung (36a) angrenzt und der zweite Hohlraum (52b) an die zweite Ringaussparung (36b) angrenzt.
19. 19. Schneideinsatz (20) nach Aspekt 17 oder 18, wobei:
    • der erste Aussparungskanal (44a) eine erste Kanalbreite (W_C1) von der ersten Anlagewand (46a) zur ersten Nichtanlagewand (48a) hat und der erste Hohlraum (52a) eine erste Hohlraumbreite (W_O1) von der ersten Anlagewand (46a) zur ersten Hohlraumwand (54a) hat,
    • der zweite Aussparungskanal (44b) eine zweite Kanalbreite (W_C2) von der zweiten Anlagewand (46b) zur zweiten Nichtanlagewand (48b) hat und der zweite Hohlraum (52b) eine zweite Hohlraumbreite (W_O2) von der zweiten Anlagewand (46b) zur zweiten Hohlraumwand (54b) hat,
    • die erste Hohlraumbreite (W_O1) größer als die erste Kanalbreite (W_C1) ist und
    • die zweite Hohlraumbreite (W_O2) größer als die zweite Kanalbreite (W_C2) ist.
20. 20. Schneideinsatz (20) nach Aspekt 19, wobei die erste Hohlraumbreite (W_O1) über 50 % größer als die erste Kanalbreite (W_C1) ist und die zweite Hohlraumbreite (W_O2) über 50 % größer als die zweite Kanalbreite (W_C2) ist.
21. 21. Schneidwerkzeug (58), das um eine Werkzeugachse (A_T) rotierbar ist und aufweist:
    • einen Schneidkörper (60); und
    • mindestens einen Wendeschneideinsatz (20) nach einem der vorstehenden Aspekte, der in einer Einsatzaufnahmetasche (62) des Schneidkörpers (60) entfernbar befestigt ist.
22. 22. Schneidwerkzeug (58) nach Aspekt 21, wobei:
    • die Einsatzaufnahmetasche (62) aufweist: eine ebene Sitzfläche (70), eine erste Stützfläche (72) quer zur Sitzfläche (70), eine erste und eine zweite Gewindebohrung (74a, 74b) in der Sitzfläche (70), und einen Höcker (76), der von der Sitzfläche (70) vorsteht, wobei der Höcker (76) eine Anschlagfläche (80) hat; und
    • der erste und zweite Aussparungskanal (44a, 44b) eine erste bzw. eine zweite Anlagewand (46a, 46b) quer zur Basisfläche (35) aufweisen,
    • wobei die Basisfläche (35) mit der Sitzfläche (70) in Kontakt steht und sich eine erste und eine zweite Klemmschraube (78a, 78b) durch die erste und zweite Klemmbohrung (28a, 28b) erstrecken und einen Gewindeeingriff mit der ersten und zweiten Gewindebohrung (74a, 74b) herstellen und
    • wobei:
      • bei Abwesenheit einer Radialauswärtskraft (F_R) auf den Schneideinsatz (20) der Höcker (76) nicht mit dem Schneideinsatz (20) in Kontakt steht und in einem Querschnitt in einer dritten Ebene (P3) senkrecht zur Werkzeugachse (A_T) die Umfangsseitenfläche (26) in Kontakt mit der ersten Stützfläche (72) steht; und
      • bei Vorhandensein einer ausreichend großen Radialauswärtskraft (F_R) auf den Schneideinsatz (20) eine der ersten oder zweiten Anlagewand (46a, 46b) mit der Höckeranschlagfläche (80) in Kontakt steht und im Querschnitt in der dritten Ebene (P3) die Umfangsseitenfläche (26) nicht mit der ersten Stützfläche (72) in Kontakt steht.
23. 23. Schneidwerkzeug (58) nach Aspekt 22, wobei bei Vorhandensein einer ausreichend großen Radialauswärtskraft (F_R) auf den Schneideinsatz (20) und in einem Querschnitt in jeder Ebene senkrecht zur Werkzeugachse (A_T) die Umfangsseitenfläche (26) nicht mit der ersten Stützfläche (72) in Kontakt steht.
24. 24. Schneidwerkzeug (58) nach Aspekt 22 oder 23, wobei:
    • die erste Stützfläche (72) radial nach außen weist und
    • die Anschlagfläche (80) radial nach innen weist.
25. 25. Schneidwerkzeug (58) nach einem der Aspekte 22 bis 24, wobei:
    • die Sitzfläche (70) eine vierte Ebene (P4) definiert und
    • sich eine gedachte Gerade (L) senkrecht zur vierten Ebene (P4) zwischen jedem Punkt auf der ersten und zweiten Ringaussparung (36a, 36b) und der vierten Ebene (P4) erstreckt, ohne einen anderen Abschnitt der Einsatzaufnahmetasche (62) zu schneiden.
26. 26. Schneidwerkzeug (58) nach einem der Aspekte 22 bis 25, wobei:
    • der Schneidkörper (60) zylinderförmig ist, wobei er eine Umfangswand (64) hat, die sich zwischen einer vorderen und einer hinteren Endfläche (66, 68) erstreckt, die in eine Vorwärts- bzw. eine entgegengesetzte Rückwärtsrichtung (F_D, R_D) weisen,
    • die Einsatzaufnahmetasche (62) in der Umfangswand (64) benachbart zur vorderen Endfläche (66) gebildet ist und
    • die erste Gewindebohrung (74a) vor der zweiten Gewindebohrung (74b) liegt.
27. 27. Schneidwerkzeug (58) nach einem der Aspekte 22 bis 26, wobei die erste Gewindebohrung (74a) zwischen der zweiten Gewindebohrung (74b) und dem Höcker (76) liegt.
28. 28. Schneidwerkzeug (58) nach einem der Aspekte 22 bis 27, wobei:
    • die Einsatzaufnahmetasche (62) eine zweite Stützfläche (84) quer zur Sitzfläche (70) aufweist,
    • die Einsatz-Umfangsseitenfläche (26) eine erste und eine gegenüberliegende zweite Sekundärseitenfläche (34a, 34b) aufweist,
    • die erste und gegenüberliegende zweite Sekundärseitenfläche (34a, 34b) die erste Längsebene (P1) schneiden und
    • eine der ersten oder gegenüberliegende zweiten Sekundärseitenfläche (34a, 34b) mit der zweiten Stützfläche (84) in Kontakt steht.
29. 29. Schneidwerkzeug (58) nach Aspekt 28, wobei:
    • die zweite Stützfläche (84) von der ersten Stützfläche (72) beabstandet ist,
    • die erste und zweite Stützfläche (72, 84) einen spitzen Außentaschenwinkel (α1) bilden und
    • der Taschenwinkel (α1) einen Wert von weniger oder gleich 60 Grad hat.
30. 30. Einseitiger Wendeschneideinsatz (20), der aufweist:
    • eine obere und eine gegenüberliegende untere Fläche (22, 24) mit Formen, die sich voneinander unterscheiden, und einer sie durchlaufenden Mittelachse (A_C);
    • eine Umfangsseitenfläche (26), die sich zwischen der oberen und unteren Fläche erstreckt, wobei die Umfangsseitenfläche eine erste und eine gegenüberliegende zweite Primärseitenfläche (32a, 32b) sowie eine erste und eine gegenüberliegende zweite Sekundärseitenfläche (34a, 34b) hat;
    • eine erste Längsebene (P1), die die Mittelachse (A_C) enthält und die erste und gegenüberliegende zweite Sekundärseitenfläche (34a, 34b) schneidet;
    • eine zweite Querebene (P2), die die Mittelachse (A_C) enthält, senkrecht zur ersten Längsebene (P1) ist und die erste und gegenüberliegende zweite Sekundärseitenfläche (34a, 34b) schneidet;
    • eine erste und eine zweite Primärschneidkante (30a, 30b), die am Schnitt der oberen Fläche (22) und der Primärseitenflächen (32a, 32b) gebildet sind;
    • eine erste und eine zweite Klemmbohrung (28a, 28b), die sich zwischen der oberen und unteren Fläche (22, 24) erstrecken und sich daran nach außen öffnen, wobei die erste und zweite Klemmbohrung (28a, 28b) eine erste bzw. eine zweite Bohrungsachse (A_B1, A_B2) haben; und
    wobei die untere Fläche (24) aufweist:
    • eine ebene Basisfläche (35);
    • einen ersten Aussparungskanal (44a), der sich von der ersten Klemmbohrung (28a) zur ersten Sekundärseitenfläche (34a) entlang der ersten Längsebene (P1) erstreckt und eine erste Anlagewand (46a) quer zur Basisfläche (35) hat;
    • einen zweiten Aussparungskanal (44b), der sich von der zweiten Klemmbohrung (28b) zur zweiten Sekundärseitenfläche (34b) entlang der ersten Längsebene (P1) erstreckt und eine zweite Anlagewand (46b) quer zur Basisfläche (35) hat; wobei:
    • der erste Aussparungskanal (44a) Teil eines ersten Hohlraums (52a) in der unteren Fläche (24) bildet, wobei der erste Hohlraum (52a) eine erste Hohlraumwand (54a) hat, die zur ersten Anlagewand (46a) weist;
    • der zweite Aussparungskanal (44b) Teil eines zweiten Hohlraums (52b) in der unteren Fläche (24) bildet, wobei der zweite Hohlraum (52b) eine zweite Hohlraumwand (54b) hat, die zur zweiten Anlagewand (46b) weist;
    • der erste und zweite Hohlraum (52a, 52b) auf Gegenseiten der zweiten Querebene (P2) liegen und
    • jeder Hohlraum (52a, 52b) asymmetrisch um die erste Längsebene P1 [(P1)] ist.

Preferred alternative and / or additional embodiments of the invention relate to the following aspects:

1. 1. One-sided indexable insert ( 20 ), which has:
   • an upper and an opposite lower surface ( 22 . 24 ) having a peripheral side surface ( 26 ) and a central axis (A _C ) passing through it, the upper and lower surfaces ( 22 . 24 ) Have shapes that differ from each other;
   • a first and a second clamping bore ( 28a . 28b ), which is between the upper and lower surface ( 22 . 24 ) and open to the outside, wherein the first and second clamping bore ( 28a . 28b ) Have a first and a second bore axis (A _B1, A _B2); and
   • a first and a second primary cutting edge ( 30a . 30b ) at the intersection of the upper surface ( 22 ) and the peripheral side surface ( 26 ) are formed;
   the lower surface ( 24 ) having:
   • a flat base surface ( 35 )
   • a first and a second ring recess ( 36a . 36b ), with the first and second clamping bore ( 28a . 28b ) communicate, and
   • a first and a second recess channel ( 44a . 44b ) extending from the first and second clamping bores ( 28a . 28b ) to the peripheral side surface ( 26 ), wherein the first and second recess channels ( 44a . 44b ) extend parallel to a first longitudinal plane (P1) containing the central axis (AC).
2. 2. Cutting insert ( 20 ) by aspect 1 , where the base area ( 35 ) no more than two transversely spaced coplanar base part surfaces ( 35 ' . 35 " ) having.
3. 3. cutting insert ( 20 ) by aspect 1 or 2 wherein the first and second bore axes (A _B1 , A _B2 ) are included in the first longitudinal plane (P1).
4. 4. Cutting insert ( 20 ) by aspect 3 , in which:
   • the first and second bore axes (A _B1 , A _B2 ) are parallel and spaced from each other by a hole spacing (D _S ),
   • the first and second primary cutting edges ( 30a . 30b ) have a first and a second primary length (L _P1 , L _P2 ) in the measurement parallel to the first longitudinal plane (P1) and
   • the first and second primary lengths (L _P1 , L _P2 ) are each greater than twice the hole spacing (D _S ).
5. 5. cutting insert ( 20 ) according to one of the preceding aspects, wherein:
   • the first and second recess channels ( 44a . 44b ) a first and a second investment wall ( 46a . 46b ) across the base surface ( 35 ) exhibit,
   • a section of a first bearing axis (A _A1 ) parallel to the first longitudinal plane (P1) in the first bearing wall ( 46a ) is included and
   • a section of a second bearing axis (A _A2 ) parallel to the first longitudinal plane (P1) in the second bearing wall ( 46b ) is included.
6. 6. Cutting insert ( 20 ) by aspect 5 , wherein the first and second investment wall ( 46a , 46b) perpendicular to the base surface ( 35 ) are.
7. 7. Cutting insert ( 20 ) by aspect 5 or 6 , wherein the first and second investment wall ( 46a . 46b ) and are flat.
8. 8. Cutting insert ( 20 ) after one of the aspects 5 to 7 , wherein the first and second investment wall ( 46a . 46b ) lie on opposite sides of the first longitudinal plane (P1).
9. 9. cutting insert ( 20 ) after one of the aspects 5 to 8th , wherein the first and second investment wall ( 46a . 46b ) are longitudinally spaced from one another and lie on opposite sides of a second transverse plane (P2) containing the central axis (A _C ) and perpendicular to the first longitudinal plane (P1).
10. 10. Cutting insert ( 20 ) after one of the aspects 5 to 9 , in which:
    • the first and second recess channels ( 44a . 44b ) a first or a second non-investment wall ( 48a . 48b ), which lead to the first and second abutment wall ( 46a . 46b ) point,
    • a section of the first bearing axis (A _A1 ) in the second non-investment wall ( 48b ) is included and
    • a section of the second bearing axis (A _A2 ) in the first non-investment wall ( 48a ) is included.
11. 11. Cutting insert ( 20 ) after one of the aspects 5 to 10 where the lower surface ( 24 ) a third recess channel ( 44c ) extending from the first clamping bore ( 28a ) to the second clamping bore ( 28b ).
12. 12. Cutting insert ( 20 ) according to any one of the preceding aspects, wherein the first and second ring recesses ( 36a . 36b ) a first and a second bore narrowing section (FIG. 40a . 40b ) of the first and second clamping bore ( 28a , 28b) intersect at a first and a second minimum bore diameter (DB _{MIN1, MIN2} DB).
13. 13. Cutting insert ( 20 ) by aspect 12 , in which:
    • the first and second ring recesses ( 36a . 36b ) a first and a second annular shoulder surface ( 38a . 38b ) exhibit,
    • the first and second annular shoulder surfaces ( 38a . 38b ) the first and second bore narrowing section (16) 40a . 40b ) to cut; and
    • the first and second annular shoulder surfaces ( 38a . 38b ) are coplanar and perpendicular to the central axis (A _C ).
14. 14. Cutting insert ( 20 ) by aspect 12 or 13 , in which:
    • the first and second recess channels ( 44a . 44b ) have a first and a second channel depth (D _C1 , D _C2 ) in the measurement parallel to the central axis (A _C ) and
    • the first channel depth (D _C1 ) is at least one fifth of the first minimum bore diameter (DB _MIN1 ) and the second channel depth (D _C2 ) is at least one fifth of the second minimum bore diameter (DB _MIN2 ).
15. 15. Cutting insert ( 20 ) after one of the aspects 12 to 14 , in which:
    • the first and second ring recesses ( 36a . 36b ) a first and a second conical recess surface ( 42a . 42b ) and
    • the first and second conical recess surface ( 42a . 42b ) the base area ( 35 ) at a first and a second maximum recess _diameter (DR _MAX1 , DR _MAX2 ) intersect.
16. 16. Cutting insert ( 20 ) by aspect 15 wherein the first maximum recess diameter (DR _MAX1 ) is at least six-fifths of the first minimum bore diameter (DB _MIN1 ) and the second maximum recess diameter (DR _MAX2 ) is at least six-fifths of the second minimum bore diameter (DB _MIN2 ).
17. 17. Cutting insert ( 20 ) after one of the aspects 10 to 16 , in which:
    • the first recess channel ( 44a ) Part of a first cavity ( 52a ) in the lower surface ( 24 ) and the second recess channel ( 44b ) Part of a second cavity ( 52b ) forms; and
    • the first cavity ( 52a ) a first cavity wall ( 54a ) to the first investment wall ( 46a ), and the second cavity ( 52b ) a second cavity wall ( 54b ), which leads to the second plant wall ( 46b ).
18. 18. Cutting insert ( 20 ) by aspect 17 , wherein the first cavity ( 52a ) to the first ring recess ( 36a ) and the second cavity ( 52b ) to the second ring recess ( 36b ) adjoins.
19. 19. Cutting insert ( 20 ) by aspect 17 or 18 , in which:
    • the first recess channel ( 44a ) a first channel width (W _C1 ) from the first abutment wall ( 46a ) to the first non-investment wall ( 48a ) and the first cavity ( 52a ) a first cavity width (W _O1 ) from the first abutment wall ( 46a ) to the first cavity wall ( 54a ) Has,
    • the second recess channel ( 44b ) a second channel width (W _C2 ) from the second plant wall ( 46b ) to the second non-investment wall ( 48b ) and the second cavity ( 52b ) a second cavity width (W _O2 ) from the second abutment wall ( 46b ) to the second cavity wall ( 54b ) Has,
    • the first cavity width (W _O1) is greater than the first channel width (W _C1), and
    • the second cavity width (W _O2 ) is greater than the second channel width (W _C2 ).
20. 20. Cutting insert ( 20 ) by aspect 19 wherein the first cavity width (W _O1 ) is over 50% larger than the first channel width (W _C1 ) and the second cavity width (W _O2 ) is over 50% larger than the second channel width (W _C2 ).
21. 21. Cutting tool ( 58 ) which is rotatable about a tool axis (A _T ) and comprises:
    • a cutting body ( 60 ); and
    • at least one indexable insert ( 20 ) according to one of the preceding aspects, which is located in an insert receiving pocket ( 62 ) of the cutting body ( 60 ) is removably attached.
22. 22. Cutting tool ( 58 ) by aspect 21 , in which:
    • the insert receiving bag ( 62 ): a flat seat surface ( 70 ), a first support surface ( 72 ) across the seat ( 70 ), a first and a second threaded hole ( 74a , 74b) in the seat ( 70 ), and a cusp ( 76 ), from the seat ( 70 protruding, wherein the hump ( 76 ) a stop surface ( 80 ) Has; and
    • the first and second recess channels ( 44a . 44b ) a first and a second investment wall ( 46a . 46b ) across the base surface ( 35 ) exhibit,
    • where the base area ( 35 ) with the seat ( 70 ) is in contact and a first and a second clamping screw ( 78a . 78b ) through the first and second clamping bore ( 28a . 28b ) and a threaded engagement with the first and second threaded holes ( 74a . 74b ) and
    • in which:
      • in the absence of a radial outward force (F _R ) on the cutting insert ( 20 ) the hump ( 76 ) not with the cutting insert ( 20 ) is in contact and in a cross section in a third plane (P3) perpendicular to the tool axis (A _T ) the peripheral side surface ( 26 ) in contact with the first support surface ( 72 ) stands; and
      • in the presence of a sufficiently large radial outward force (F _R ) on the cutting insert ( 20 ) one of the first or second investment wall ( 46a . 46b ) with the bump stop surface ( 80 ) and in cross-section in the third plane (P3) the peripheral side surface ( 26 ) not with the first support surface ( 72 ) is in contact.
23. 23. Cutting tool ( 58 ) by aspect 22 , wherein in the presence of a sufficiently large radial outward force (F _R ) on the cutting insert ( 20 ) and in a cross section in each plane perpendicular to the tool axis (A _T ) the peripheral side surface ( 26 ) not with the first support surface ( 72 ) is in contact.
24. 24. Cutting tool ( 58 ) by aspect 22 or 23 , in which:
    • the first support surface ( 72 ) points radially outwards and
    • the stop surface ( 80 ) points radially inwards.
25. 25. Cutting tool ( 58 ) after one of the aspects 22 to 24 , in which:
    • the seat ( 70 ) defines a fourth level (P4) and
    • an imaginary line (L) perpendicular to the fourth plane (P4) between each point on the first and second ring recesses (P4) 36a . 36b ) and the fourth level (P4), without another portion of the insert receiving pocket (FIG. 62 ) to cut.
26. 26. Cutting tool ( 58 ) after one of the aspects 22 to 25 , in which:
    • the cutting body ( 60 ) is cylindrical, wherein it has a peripheral wall ( 64 ) located between a front and a rear end surface ( 66 . 68 ) pointing in a forward or an opposite reverse direction (F _D , R _D ),
    • the insert receiving bag ( 62 ) in the peripheral wall ( 64 ) adjacent to the front end surface ( 66 ) is formed and
    • the first threaded hole ( 74a ) in front of the second threaded hole ( 74b ) lies.
27. 27. Cutting tool ( 58 ) after one of the aspects 22 to 26 , where the first threaded hole ( 74a ) between the second threaded hole ( 74b ) and the hump ( 76 ) lies.
28. 28. Cutting tool ( 58 ) after one of the aspects 22 to 27 , in which:
    • the insert receiving bag ( 62 ) a second support surface ( 84 ) across the seat ( 70 ) having,
    • the insert perimeter page area ( 26 ) a first and an opposite second secondary side surface ( 34a . 34b ) having,
    • the first and opposite second secondary side surface ( 34a . 34b ) intersect the first longitudinal plane (P1) and
    • one of the first or opposite second secondary side surface ( 34a . 34b ) with the second support surface ( 84 ) is in contact.
29. 29. Cutting tool ( 58 ) by aspect 28 , in which:
    • the second support surface ( 84 ) from the first support surface ( 72 ) is spaced,
    • the first and second support surface ( 72 . 84 ) form an acute outer pocket angle (α1) and
    • the pocket angle (α1) has a value of less than or equal to 60 degrees.
30. 30. One-sided indexable insert ( 20 ), which has:
    • an upper and an opposite lower surface ( 22 . 24 ) With shapes different from each other, and passing through it center line (A _C);
    • a peripheral side surface ( 26 ) extending between the upper and lower surfaces, wherein the peripheral side surface has a first and an opposing second primary side surface (FIGS. 32a . 32b ) and a first and an opposite second secondary side surface ( 34a . 34b ) Has;
    • a first longitudinal plane (P1) containing the central axis (A _C ) and the first and opposite second secondary side surfaces (P1) 34a . 34b ) cuts;
    • a second transverse plane (P2) containing the central axis (A _C ) perpendicular to the first longitudinal plane (P1) and the first and opposite second secondary side surfaces (P2) 34a . 34b ) cuts;
    • a first and a second primary cutting edge ( 30a . 30b ) at the intersection of the upper surface ( 22 ) and the primary side surfaces ( 32a . 32b ) are formed;
    • a first and a second clamping bore ( 28a . 28b ) extending between the upper and lower surfaces ( 22 . 24 ) and open to the outside, wherein the first and second clamping bore ( 28a . 28b ) have a first and a second bore axis (A _B1 , A _B2 ); and
    the lower surface ( 24 ) having:
    • a flat base surface ( 35 );
    • a first recess channel ( 44a ) extending from the first clamping bore ( 28a ) to the first secondary side surface ( 34a ) along the first Longitudinal plane (P1) and a first investment wall ( 46a ) across the base surface ( 35 ) Has;
    • a second recess channel ( 44b ) extending from the second clamping bore ( 28b ) to the second secondary side surface ( 34b ) extends along the first longitudinal plane (P1) and a second abutment wall (P1) 46b ) across the base surface ( 35 ) Has; in which:
    • the first recess channel ( 44a ) Part of a first cavity ( 52a ) in the lower surface ( 24 ), wherein the first cavity ( 52a ) a first cavity wall ( 54a ) to the first investment wall ( 46a );
    • the second recess channel ( 44b ) Part of a second cavity ( 52b ) in the lower surface ( 24 ), wherein the second cavity ( 52b ) a second cavity wall ( 54b ), which leads to the second plant wall ( 46b );
    • the first and second cavities ( 52a . 52b ) lie on opposite sides of the second transverse plane (P2) and
    • every cavity ( 52a . 52b ) is asymmetrical about the first longitudinal plane P1 [(P1)].

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• FR 2837732 [0003]
• US 7597507 [0004]

Claims (20)

One-sided indexable cutting insert (20) comprising: upper and opposing lower surfaces (22, 24) having a peripheral side surface (26) extending therebetween and a central axis (A _C ) passing therethrough, said upper and lower surfaces (22, 24 ) Have shapes that differ from each other; first and second clamping bores (28a, 28b) extending between the upper and lower surfaces (22, 24) and opening outwardly therefrom, the first and second clamping bores (28a, 28b) respectively first and second Bore axis (A _B1 , A _B2 ) have; and first and second primary cutting edges (30a, 30b) formed at the intersection of the top surface (22) and the peripheral side surface (26); the lower surface (24) comprising: a planar base surface (35), first and second annular recesses (36a, 36b) communicating with the first and second clamping bores (28a, 28b), respectively, and first and second recess channels (44a, 44b) extending from the first and second clamping bores (28a, 28b) to the peripheral side surface (26), respectively, the first and second recess channels (44a, 44b) extending parallel to a first longitudinal plane (P1) the central axis (AC) contains. Cutting insert (20) after Claim 1 wherein the base surface (35) has no more than two transversely spaced coplanar base part surfaces (35 ', 35 "). Cutting insert (20) after Claim 1 or 2 wherein: the first and second recess channels (44a, 44b) have first and second abutment walls (46a, 46b) transversely of the base surface (35), a portion of a first abutment axis (A _A1 ) parallel to the first longitudinal plane (P1) the first abutment wall (46a) is included and a portion of a second abutment axis (A _A2 ) parallel to the first longitudinal plane (P1) in the second abutment wall (46b) is included. Cutting insert (20) after Claim 3 wherein the first and second abutment walls (46a, 46b) are perpendicular to the base surface (35). Cutting insert (20) after Claim 3 or 4 wherein the first and second abutment walls (46a, 46b) are ground and flat. Cutting insert (20) according to one of Claims 3 to 5 wherein the first and second abutment walls (46a, 46b) are longitudinally spaced from one another and lie on opposite sides of a second transverse plane (P2) containing the central axis (A _C ) and perpendicular to the first longitudinal plane (P1). Cutting insert (20) according to one of Claims 3 to 6 wherein: the first and second recess channels (44a, 44b) include first and second non-abutment walls (48a, 48b) facing the first and second abutment walls (46a, 46b), a portion of the first abutment axis (A _A1 ) the second non-abutment wall (48b) is included and a portion of the second abutment axis (A _A2 ) in the first non-investment wall (48a) is included. The cutting insert (20) of any one of the preceding claims, wherein the first and second annular recesses (36a, 36b) include first and second bore throat portions (40a, 40b) of the first and second clamping bores (28a, 28b) at first and second bore holes, respectively second minimum bore diameter (DB _MIN1 , DB _MIN2 ). Cutting insert (20) after Claim 8 wherein: the first and second annular recesses (36a, 36b) have first and second annular shoulder surfaces (38a, 38b), respectively, the first and second annular shoulder surfaces (38a, 38b) intersecting the first and second bore narrowing portions (40a, 40b); and the first and second annular shoulder surfaces (38a, 38b) are coplanar and perpendicular to the central axis (A _C ). Cutting insert (20) after Claim 8 or 9 wherein: the first and second recess channels (44a, 44b) have first and second channel depths (D _C1 , D _C2 ) in the measurement parallel to the central axis (A _C ) and the first channel depth (D _C1 ) at least one fifth of the channel depth first minimum bore diameter (DB _MIN1 ) and the second channel depth (D _C2 ) is at least one fifth of the second minimum bore diameter (DB _MIN2 ). Cutting insert (20) according to one of Claims 8 to 10 wherein: the first and second annular recesses (36a, 36b) have first and second conical recessed surfaces (42a, 42b) respectively, the first and second conical recessed surfaces (42a, 42b) engage the base surface (35) at first and second second maximum recess _diameter (DR _MAX1 , DR _MAX2 ) and the first maximum recess diameter (DR _MAX1 ) is at least six-fifths of the first minimum bore diameter (DB _MIN1 ) and the second maximum recess diameter (DR _MAX2 ) is at least six-fifths of the second minimum bore diameter (DB _MIN2 ) is. Cutting insert (20) according to one of Claims 7 to 11 wherein: the first recess channel (44a) forms part of a first cavity (52a) in the lower surface (24) and the second recess channel (44b) forms part of a second cavity (52b); and the first cavity (52a) has a first cavity wall (54a) facing the first abutment wall (46a) and the second cavity (52b) has a second cavity wall (54b) facing the second abutment wall (46b). Cutting insert (20) after Claim 12 wherein the first cavity (52a) is adjacent the first annular recess (36a) and the second cavity (52b) is adjacent the second annular recess (36b). Cutting insert (20) after Claim 12 or 13 wherein: the first recess channel (44a) has a first channel width (W _C1 ) from the first abutment wall (46a) to the first non-abutment wall (48a), and the first cavity (52a) has a first cavity width (W _O1 ) from the first abutment wall (46a ) to the first cavity wall (54a), the second recess channel (44b) has a second channel width (W _C2 ) from the second abutment wall (46b) to the second non-abutment wall (48b) and the second cavity (52b) has a second cavity width (W _O2 ) from the second abutment wall (46b) to the second cavity wall (54b), the first cavity width (W _O1 ) is over 50% larger than the first channel width (W _C1 ) and the second cavity width (W _O2 ) is over 50% larger than the second one Channel width (W _C2 ) is. A cutting tool (58) rotatable about a tool axis (A _T ) and comprising: a cutting body (60); and at least one indexable cutting insert (20) according to any one of the preceding claims, removably mounted in an insert receiving pocket (62) of the cutter body (60), wherein: the insert receiving pocket (62) comprises: a planar seat surface (70), a first support surface (72 ) across the seating surface (70), first and second threaded bores (74a, 74b) in the seating surface (70), and a boss (76) projecting from the seating surface (70), the boss (76) defining a stop surface (80) has; and the first and second recess channels (44a, 44b) have first and second abutment walls (46a, 46b) across the base surface (35), the base surface (35) contacting the seat surface (70) and a first one and a second clamping screw (78a, 78b) through the first and second clamping bore (28a, 28b) extend and a threaded engagement with the first and second threaded bore (74a, 74b) produce and wherein: in the absence of a radial outward force (F _R) on the cutting insert (20) the bump (76) is not in contact with the cutting insert (20) and in a cross section in a third plane (P3) perpendicular to the tool axis (A _T ) the peripheral side surface (26) in contact with the first support surface (72). stands; and in the presence of a sufficiently large radial outward force (F _R ) on the cutting insert (20) one of the first or second abutment wall (46a, 46b) is in contact with the bump stop surface (80) and in cross-section in the third plane (P3) the peripheral side surface (FIG. 26) is not in contact with the first support surface (72). Cutting tool (58) after Claim 15 wherein: the first support surface (72) faces radially outward and the stop surface (80) faces radially inwardly. Cutting tool (58) after Claim 15 or 16 wherein: the cutting body (60) is cylindrical in shape having a peripheral wall (64) extending between a front and a rear end surface (66, 68) facing in a forward or reverse direction (F _D , _FIG . R _D ), the insert receiving pocket (62) is formed in the peripheral wall (64) adjacent the front end surface (66), and the first threaded bore (74a) is between the second threaded bore (74b) and the boss (76) and before the second threaded bore (74b). Cutting tool (58) according to one of Claims 15 to 17 wherein: the insert receiving pocket (62) has a second support surface (84) across the seat surface (70), the insert peripheral side surface (26) has first and opposing second secondary side surfaces (34a, 34b), the first and opposite second secondary side surfaces (34). 34a, 34b) intersect the first longitudinal plane (P1) and one of the first or opposite second secondary side surface (34a, 34b) is in contact with the second support surface (84). Cutting tool (58) after Claim 18 wherein: the second support surface (84) is spaced from the first support surface (72), the first and second support surfaces (72, 84) form an acute outer pocket angle (α1), and the pocket angle (α1) is less than or equal to 60 degrees Has. One-sided indexable cutting insert (20) comprising: upper and opposite lower surfaces (22, 24) having shapes different from each other and a central axis (A _C ) passing therethrough; a peripheral side surface (26) extending between the upper and lower surfaces, the peripheral side surface having first and second opposed primary side surfaces (32a, 32b) and first and second opposed secondary side surfaces (34a, 34b); a first longitudinal plane (P1) containing the central axis (A _C ) and intersecting the first and opposite second secondary side surfaces (34a, 34b); a second transverse plane (P2) containing the central axis (A _C ) perpendicular to the first longitudinal plane (P1) and intersecting the first and opposite second secondary side surfaces (34a, 34b); first and second primary cutting edges (30a, 30b) formed at the intersection of the upper surface (22) and the primary side surfaces (32a, 32b); first and second clamping bores (28a, 28b) extending between the upper and lower surfaces (22, 24) and opening outwardly therefrom, the first and second clamping bores (28a, 28b) respectively first and second Bore axis (A _B1 , A _B2 ) have; and wherein the lower surface (24) comprises: a planar base surface (35); a first recess channel (44a) extending from the first clamping bore (28a) to the first secondary side surface (34a) along the first longitudinal plane (P1) and having a first abutment wall (46a) transverse to the base surface (35); a second recess channel (44b) extending from the second clamping bore (28b) to the second secondary side surface (34b) along the first longitudinal plane (P1) and having a second abutment wall (46b) transverse to the base surface (35); wherein: the first recess channel (44a) forms part of a first cavity (52a) in the lower surface (24), the first cavity (52a) having a first cavity wall (54a) facing the first abutment wall (46a); the second recess channel (44b) forms part of a second cavity (52b) in the lower surface (24), the second cavity (52b) having a second cavity wall (54b) facing the second abutment wall (46b); the first and second cavities (52a, 52b) lie on opposite sides of the second transverse plane (P2) and each cavity (52a, 52b) is asymmetrical about the first longitudinal plane P1.

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