CN1035242C

CN1035242C - Cutting insert

Info

Publication number: CN1035242C
Application number: CN90108184A
Authority: CN
Inventors: 阿米尔·萨特兰
Original assignee: Iscar Ltd
Current assignee: Iscar Ltd
Priority date: 1990-09-06
Filing date: 1990-09-06
Publication date: 1997-06-25
Anticipated expiration: 2005-09-06
Also published as: CN1059487A

Abstract

The present invention relates to a cutting blade which comprises central body parts with longitudinal symmetry planes, and a pair of opposite ends which are composed of the central body parts, and respective front surfaces and back faces and are formed by the combination of a first cutting edge and a second cutting edge with essentially equal width, wherein the back surface of each end is tilted by certain amount in one direction so that a gap is arranged between the back surface and the side wall of a tank to be cut. The midpoint normal of the first cutting edge is tilted by an angle alpha in the first direction correspondingly to the symmetry planes, the midpoint normal of the second cutting edge is tilted by an angle alpha in the second direction opposite to the first direction correspondingly to the symmetry planes, so the cutting edges are titled with each other by two angles alpha.

Description

A kind of cutting tip

The application relates to a kind of cutting tip, particularly but be not only the cutting tip that is used for the end face grooving.

This cutting tip is normally removable and releasably be clamped between the jaw of handle of a knife.Add man-hour at the end face grooving of making the annular end face groove, use the jaw that bends to annular so that when cutting cannelure, it can insert in the cannelure in the clear, and this has been known.In addition, the back of blade is not hindered when inserting cannelure for ease of blade, and it also is known making curved shape.Yet the blade of the crooked back of this band has produced a lot of problems when using the conventional moulded technology to produce.Substitute as the curved blades back is pushed out recently, and it has flat back, and it tilts, and its numerical value and direction will make the back and be cut out between the sidewall of groove has the gap.

In general, particularly to cut the problem that blade occurred of end face groove relevant with the blade structure with a pair of opposite cutting edge that is provided for interchangeable section groove blade.These blade structures with opposite cutting edge obviously are useful, and it can be saved the material of cutting tip and can make the rapid transposition of blade, so that use when blunt at opposite cutting edge, can use a new cutting edge.Yet the trend of the restricted cutting groove depth of structure with cutting tip of a pair of opposite cutting edge, because the grooving of realizing by a cutting edge, anyly want that the attempt of extending its cutting depth makes that all second cutting edge is that opposite cutting edge thrusts, it is that opposite cutting edge is stuck in the cannelure that the result causes second cutting edge.

Be disclosed in a kind of double cutting edge section groove blade that is designed to not limit cutting depth among the european patent application-0150901, its first cutting edge be arranged on the rectangular substantially same plane of second cutting edge in.This section groove blade product particularly can bring problem when suitable smear metal forms device and need to change common mould pressing process when cutting edge is equipped with.

In order to process radial slot, JPA-53-114588 (JP-B-57-55521) discloses a kind of cutting tip, it comprises the end that a pair of direction is opposite, be formed with rake and back and the first and second wide basically end cutting edges on it respectively, the gradient of the back of each end quantity and aspect on make the back and the sidewall of the groove that cuts out between have a gap; Article one, the end can rotate the axis of symmetry of calibration around it; One on mid point perpendicular to the plane of first cutting edge, it on a first direction with respect to the axis of symmetry α angle that tilts, one on mid point perpendicular to the plane of second cutting edge, it one second be on the rightabout with respect to the axis of symmetry α angle that tilts, thereby separately perpendicular to one the 2 α angle that tilts mutually, two planes of described two cutting edges.

In fact, side of this blade and bottom surface thereof can be regarded as together and formed the bottom engagement device, and preceding top cut rake or top, back rake (depending on that rake is as preceding cutting edge) then can be regarded as and formed the top engagement device.Supposed situation is like this, and the top engagement device of blade and bottom engagement device are with regard to the vertical plane of symmetry of neither one, and cutting tip just asymmetricly is located on the cutter as shown in Figure 9 as patent specification as a result.In addition, because blade is installed in the asymmetry on the cutter, the height of cutting tip is subjected to strong restrictions.And, even the asymmetric installation of blade makes blade also unstable during radial slot in processing, because blade can not be accepted the downward tangential force that produces in the grooving operation reposefully.Its intensity can reduce when therefore, blade met with powerful cutting force in the grooving operation.

The purpose of this invention is to provide a kind of satisfy substantially above-mentioned an urgent demand and reduce basically or overcome above-mentioned shortcoming new improvement section groove blade.

According to a kind of cutting tip of the present invention, it comprises:

Be formed with the opposite end of a pair of trend of rake and back and wide basically first and second cutting edges respectively, the back of each end tilts a certain amount of in a direction, make the back and the sidewall of the groove that gone out by described blade cut between have the gap;

Article one, above-mentioned end can rotate the axis of symmetry of calibration around it;

One on mid point perpendicular to the plane of described first cutting edge, it on a first direction with respect to the described axis of symmetry α angle that tilts, one on mid point perpendicular to the plane of described second cutting edge, it one second be on the rightabout with respect to the described axis of symmetry described α angle that tilts, thereby above-mentioned two respectively perpendicular to the 2 α angles that tilt each other, the plane of first and second cutting edges;

It is characterized in that,

Described pair of end portions is combined into integral body with a central body portion respectively and is separated by this central body portion, and central body portion has a described axis of symmetry vertical plane of symmetry therein, and has the relative clamping face that is symmetrical in the described plane of symmetry; And

Each end is formed with an offside cutting edge respectively, and they at right angles are provided with basically with respect to end cutting edge separately.

Can utilize known mould pressing process to produce rapidly according to this blade of the present invention.Therefore, avoided the necessity of grinding behind blade behind the sintering basically.

Preferablely be that this blade all has an offside cutting edge that at right angles is provided with basically with respect to separately end cutting edge in each end.Can be with this blade in the transversely realization cutting of the longitudinal axis of blade.When cutting end face groove, the relative workpiece of blade is done laterally and is relatively moved, till the whole turning of the end face of workpiece.For the effective equably turning of the interior core that guarantees end face is arrived, the handle of a knife of fixed blade designed according to this invention, the preceding cutting edge that is designed to blade is basically along the rotation extension line setting perpendicular to workpiece.

In order to understand the present invention better and to express in practice and how to implement, referring now to description of drawings.

Wherein:

Fig. 1 is the perspective view according to end face section groove blade of the present invention, corresponding jaw on the handle of a knife arranged side by side.

Fig. 2 is the perspective view of blade clamping in the cutter tenon.

Fig. 3 a is for more than you know, the perspective view after blade intermediate projections portion is removed.

Fig. 3 b is the front view of the end of blade shown in Fig. 3 a.

Fig. 4 is a cylindrical work perspective view that bears the end face grooving.

Fig. 5 is a cylindrical work perspective view that bears facing.

Fig. 6 is the cutting tip shown in Fig. 4 and the cylindrical work cutaway view along the VI-VI line.

Fig. 7 is a partial enlarged drawing represented among Fig. 4.

Fig. 8 is the sketch for the minimum clearance of blade in the groove in the calculating chart 7.

The detailed description of most preferred embodiment.

As shown in the figure, cutting tip 1 is to be made of an elongated elements, and its foot 2a has rectangular cross section, and its topmost 2b comprises a central body portion 3, the sidewall copline of the sidewall of this central body 3 and foot 2 α.Central body 3 has at last vertical groove face 4.And bottom 2a has the vertical groove face 5 of bottommost.The groove trend of above and below (4,5) is opposite, and forms around central longitudinal axis parallel to each other 6,7.Longitudinal axis 6,7 is arranged in accompanying drawing 3 and 5 symmetrical planes of being seen 16.

Forming whole with central body 3 is the opposite end 8a of a pair of trend, 8b.They have last rake 9a respectively, 9b, frontal plane 10a, 10b and rear flank face 11a separately, 12a and 11b, 12b.Rake 9a is by a preceding cutting edge 13a and side cutting edge 14b, and 15b is the edge.And rake 9b is by preceding cutting edge 13b and side cutting edge 14b, and 15b constitutes back 11a, 12a and 11b, 12b is from side cutting edge 14a, 15a and 14b, and 15b tilts towards bottom 2a, so that in these back and be cut between the sidewall of groove gappedly, just can find out with reference to figure 5.

Particularly can find out Fig. 3 from scheming, rake 9a, 9b tilts with respect to the plane of symmetry 16 in the opposite direction separately with their cutting edge.Therefore, the normal of the mid point of cutting edge 13a is with respect to symmetrical plane 16 tilt alpha angles, and the normal of the mid point of cutting edge 13b is with respect to symmetrical plane 16 tilt alpha angles, so mutual inclination is 20 jiaos between bite 13a and the 13b.

As can be seen, blade 1 is designed to be clamped between the

jaw

21,22 of a pair of handle of a knife 20 as shown in Figure 4 from Fig. 1 and Fig. 2.Make fin 23 below the jaw 21, in the groove 4 of the blade 1 of can packing into; And jaw 22 above make fin 24, in the groove 5 of the blade 1 of can packing into.Jaw 21 and 22 is bending so that see approximate convex on the plane of paper.As shown in Figure 2, blade 1 is bumped between the

pawl

21,22 in use, fits among groove 4 and 5 so that rib 23 and 24 is even respectively, and then, jaw is clipped by the device (not shown).

Be contained in blade 1 in the handle of a knife shown in Figure 2 in the use of cutting end face groove and turner part end face, now illustrate with reference to Fig. 4 and Fig. 5 respectively.As can be seen from Figure 4, a cylindrical work 25, (in order to understand, cutd open circumference 1/4th) have an end face 26, this workpiece is around its longitudinal axis clockwise direction and with respect to cutting tip 1 rotation of adjoining, thereby makes cannelure 27.

As shown in Figure 5, when workpiece rotated, the blade on the cutting tool moved radially to the center of workpiece, realized the facing of workpiece thus.

As shown in Figure 4, when carrying out the end face grooving, need use different blades for the different-diameter scope.Yet when carrying out facing, a single blade just can be used in the processing all surfaces because when blade when workpiece centre moves, it no longer adjoins with external groove sidevall.

Be reference with Fig. 6 and Fig. 7 now, blade 1 is done one with respect to being provided with of workpiece 25 and is described and describe the using method that blade obtains unrestricted cutting groove depth in detail.Can clearly be seen that from Fig. 4 the curvature of

jaw

21,22 can make the cutter of clamping blade enter easily among the groove 27.Can find out that from Fig. 7 blade is contained in the

jaw

21,22, make its preceding cutting edge 13a be provided with along the radius 28 of the circumference of the workpiece 25 of rotation.On this position, back cutting edge 13b with respect to preceding cutting edge 13a at angle, when it projected on another line 29 that is parallel to cutting edge 13a, its width was little more quite a lot of than the width of cutting edge 13a.Suppose that present workpiece clockwise direction rotation and cutting edge move on the axis of workpiece direction inwards, cannelure 27 has just been made so.This well width is corresponding to the width of cutting edge 13a.Because the flat back 11a that uses, 12a tilts, and the sidewall of groove 27 is always left in these back.And as mentioned above, when the width considered with respect to groove 27, the width of back cutting edge 13b is compared quite little with the width of groove 27.Therefore, the degree of depth of end face groove is not subjected to the restriction of blade lengths.

In view of the blade that is provided has side cutting edge 14a, the fact of 15a, the transverse movement of blade shown in Figure 5 plays effect for the width of enlarged slot and is when moving on the workpiece centre direction in this transverse movement, and guarantee can turning whole work-piece end face and do not stay any residue core for the cutting edge 13a that places along workpiece radius at first.

Referring now to Fig. 8, it is basically corresponding to Fig. 7.In order to understand the special tectonic of relevant blade, particularly geometry is how to guarantee effectively that the not only not interrupted fully insertion groove of blade gap interior but also between cell wall and back cutting edge always is enough to avoid exotic to be stuck in cell wall and the danger between the cutting edge afterwards.

As seeing among Fig. 8:

The width of forward and backward cutting edge 13a of W=and 13b

W ₁=cell wall 27a and 27b and by the distance between the straight-line intersection of cutting edge 13b

The workpiece radius r of β=by cutting edge 13a ₁Radius r with the intersection point that passes through cutting edge director 13b line ₂Between angle 2 α=cutting edge 13a and the angle between the 13b

ΔW = \frac{W_{1} - W}{2}

Δ G=is cell wall 27a on the one hand, and 27b is the annular trace 31a that is marked separately by the relative end of cutting edge 13b on the other hand, the effective clearance between the 31b.

This Δ G is equivalent to not make exotic to be stuck in the full-size of the exotic between cutting edge 13b and the cell wall.

It can be expressed as:

ΔG＝ΔW·COS(2α-β)

The present invention has specified the purposes of blade in the building up by welding groove, just is readily appreciated that also same blade can be used in vertical turning and processed.

The structure of above-mentioned geometry blade makes and provides a kind of and have the opposite rake of a pair of trend and cutting groove depth is not subjected to the cutting tip of the cutting edge of any restriction to become possibility, and reflect significantly this blade production economy many.

Claims

1. a cutting tip (1), it comprises:

Be formed with respectively rake (9a, 9b) and back (11a, 12a; 11b, 12b) and the first and second wide basically cutting edges (13a, the end that a pair of trend 13b) is opposite (8a, 8b), the back (11,12 of each end; 11,12) tilt in a direction a certain amount of, make the back and the sidewall of the groove that gone out by described blade cut between have the gap;

One on mid point perpendicular to the plane of described first cutting edge (13a), it on a first direction with respect to the described axis of symmetry α angle that tilts, one on mid point perpendicular to the plane of described second cutting edge (13b), it is with respect to described α angle of described axis of symmetry inclination on the rightabout at one second, thereby above-mentioned two respectively perpendicular to first and second cutting edges (13a, the 2 α angles that tilt each other, plane 13b);

It is characterized in that,

Described pair of end portions is combined into integral body with a central body portion (3) respectively and is separated by this central body portion, and central body portion has a described axis of symmetry vertical plane of symmetry therein, and has the relative clamping face that is symmetrical in the described plane of symmetry; And

(8a 8b) is formed with offside cutting edge (14a, a 15a respectively in each end; 14b, 15b), (13a 13b) at right angles is provided with basically with respect to separately end cutting edge for they.

2. one kind comprises that a clamping on it has the cutting tool of the handle of a knife of cutting tip (20) according to claim 1, described handle of a knife (20) has a pair of by flush mounting (23,24) the jaw that forms (21,22), join by on the central body portion (3) of described blade (1) in order to idol, the flush mounting (4 of the formed correspondence of lower surface, 5), described jaw (21,22) be bending so that allow to insert among the cannelure, it is characterized in that: described jaw (21,22) be designed to be convenient to the described blade of clamping (1), its outside cutting edge (13a) vertically is provided with respect to the longitudinal axis of handle of a knife (20).