CN1013746B - Cutting insert and tool holder therefor - Google Patents

Abstract

The present invention relates to a metal cutting insert block which has a top surface, a bottom surface, a front surface, a rear surface and side surfaces and is mainly in a polyhedron shape, wherein the top surface and the front surface are crossed and form a front cutting edge; the top surface and both side surfaces are crossed and respectively form a first side cutting edge and a second side cutting edge; a cutting scrap forming device positioned on the top surface is in a first cutting limiting region; the top surface and the bottom surface are in a convex layout and a concave layout.

Description

Cutting insert and tool holder therefor

The present invention relates to a kind of cutting insert, described inserting is hard material by wear-resisting, and for example carbide alloy is made, and be used for to metal slot, cut-out, turning or bore hole processing.

This inserting generally is to be securely held on replaceably in the inserting slot of tool-holder.Thereby, above-mentioned insert can by, for example oblique wedge forms, so that wedging is in the corresponding wedge-like groove of tool-holder.Above-mentioned inserting can be clamped in a pair of jaw on the tool-holder with being exchanged.Define an inserting slot on this jaw, clamp above-mentioned inserting obliquely by suitable mechanical means.

Can see that metal cutting processing relates to cutting form (from workpiece to be machined), get rid of metal, and the meaning of cutting is that described smear metal can be discharged the workspace effectively safely and effectively.In order to reach this purpose, people just know for a long time should provide a kind of like this cutting insert, make it have chip breaking and/or one-tenth bits device, guaranteeing to be definite shape and/or fracture soon after smear metal forms, thereby make smear metal discharge the workspace and do not influence and continue cutting or harm operating personnel.

Use in such cutting insert process for above-mentioned purpose, people have realized that for a long time and are used on the one hand to cut off or the cutter of the processing of slotting and to be used for the cutter that horizontal turning (as cylinder) processes on the other hand be distinguishing.In first kind of situation, cutter is slotted or the workpiece that cuts off carries out radial motion towards the quilt that is rotating, and in second kind of situation, cutter then carries out horizontal motion.Different add man-hour carrying out these, people know for a long time and change tool-holder from single stepping to another step action need and insert, and only are used for satisfying this step and operate because be used for the cutting insert of a certain specific operation.

This must to change cutting insert by the needs of machining itself obviously be time-consuming, but also need prepare for being applied to different processing.In view of existing situation, the applicant has developed a kind of new-type cutter cutting system, known to us is the system of applicant's trade mark with CUT-CRIP promptly.At this, same cutting insert can be used to cut off and fluting on the one hand, and on the other hand, also can be used for horizontal turning processing.Inserting like this hereinafter will be referred to as " multidirectional Tool in Cutting is inserted ".

This multidirectional Tool in Cutting is inserted and is suitable for being clamped on the custom-designed tool-holder, and this tool-holder has and its a pair of clamping claw whole and that reciprocally form.Define an inserting slot that is used to clamp cutting insert between clamping claw, the elongate slot that this inserting slot and forms on tool-holder is connected, and described elongate slot is vertically deviating from the inserting slot extension.One screw clamp means is passed tool-holder in the finedraw district, thereby, insert inserting slot when inserting after, tighten screw clamp means, make upper jaw obliquely with toply clamping securely of inserting.Insert and jaw between adjacent surface preferably form by the keyway face, with the accurate centering of guaranteeing to insert, the transverse shift after clamping avoided inserting in tool-holder.

So far, for clamping and, being necessary to limit an acute angle at the place, upper jaw exterior angle of tool-holder with respect to the acutangulate multidirectional cutting insert of tool-holder longitudinal axis.As can be seen, tool-holder, especially its exterior angle, work in-process must can bear sizable power, it is also understood that, makes the place, exterior angle be defined as acute angle, and this fact means that the place, exterior angle is relative weak link, may cause breaking when being subjected to stress.From prior art United States Patent (USP) U.S.Patent No.3,894,322 a kind of as can be known cutting tools that have tool-holder and replaceable cutting insert, this cutter can be used for horizontal turning operation.From the specification of the prior art as can be known, disclosed tool-holder has bottom Jia Kou, and this folder mouthful limits an acute angle in the tool-holder forward position.Therefore, the bent angle of folder mouth is relatively weaker from the above.

Therefore, the object of the present invention is to provide a kind of novel multidirectional cutting insert, inserting by means of this to overcome top pointed various unfavorable factors, another object of the present invention is to, and a new-type cutter folder that is suitable for according to multidirectional cutting insert of the present invention is provided.

Insert according to long prismatic metal cutting provided by the present invention have end face, bottom surface, preceding peripheral surface, rear perimeter edge face and a pair of side periphery face.First cutting end of inserting of cutting edge forms at end face and preceding peripheral surface intersection before having; And the first and second side cutting edges form at end face and two side periphery face intersections respectively; Smear metal forms device and is positioned at the zone that is limited by cutting edge on the described end face, it is characterized in that described end face and bottom surface are convex and concave panel configuration with respect to insert X and Y respectively.

Mentioned term " convex and concave panel " in this specification comprises the cambered surface of convex and spill and the surface that is formed convex and spill by a series of continuous facet zone common combinations respectively.

Therefore, made things convenient for the use of tool-holder with lower jaw according to the structure of cutting insert of the present invention, described lower jaw and the adjacent edge limited one at least 90 ° angle of tool-holder, increase the intensity of tool-holder by this way, make it can sustain the pulling force that is applied to it in the working angles.

In order to understand the present invention better, and show how the present invention implements in practice, describes below with reference to accompanying drawings, wherein:

Fig. 1 is the perspective view that the lathe tool system of cutting insert and tool-holder is housed according to of the present invention.

Fig. 2 inserts from the perspective view of top projection according to the cutter of first kind of form of the present invention.

Fig. 3 is shown in Figure 2 inserting from the perspective view of below projection.

Fig. 4 is inserting from the perspective view of below projection after improving according to the present invention.

Fig. 5 is the side view of cutting tool according to the present invention folder.

Fig. 6 is the plane from the top projection of tool-holder shown in Figure 5.

Fig. 7 is the thin portion longitudinal sectional view of tool-holder shown in Figure 6.

Fig. 8 is the thin portion view of insertion pinching screw shown in Figure 7.

At first with reference to Fig. 1.Multidirectional Tool in Cutting of explanation mounting means on a tool-holder of inserting among the figure.As seen from the figure, its detailed structure of 1(of inserting of the multidirectional Tool in Cutting with the epirelief concave surface 2a of roughly coaxial longitudinal extension and 2b describes with reference to all the other accompanying drawings) be clamped at by among hilt 6 integrally formed jaws 4 and 5 corresponding parallel surface 3a and the 3b.This 3a and the determined inserting slot of 3b face are used for insert and insert 1.The finedraw 7 that inserting slot and extends back is connected, and this structure can provide strain required when clamping.Inserting 1 is clamped in the inserting slot securely by pinching screw 8, and when tightening screw 8, jaw 4 and 5 clamps and is pressed on the respective face 2a and 2b that inserts.2a and 2b face are formed by the V-type face of longitudinal extension respectively, and these V-type faces match with the convex V-type muscle that forms corresponding vice jaw surface 3a and 3b.Cooperate with male and fomale(M﹠F) between 2a and 2b face by the muscle of jaw 4 and 5, insert with respect to hilt 6 transverse movements preventing.

As seen from the figure, at the interior angle of inserting slot the pin of one butt joint is arranged, it is used for limiting 1 degree of inserting of inserting in inserting slot, in case the interior cutting end Touch that inserts is to the end of inserting slot.

Referring now to Fig. 2 Fig. 3, describe a embodiment in detail according to cutting insert 11 of the present invention.

As seen from the figure, cutting insert has the end face that is convex substantially and the bottom surface 12a and the 12b of spill to constitute by one.Peripheral surface and rear perimeter edge face 13a and 13b and side periphery face 14a and 14b before this is inserted and also has.End face and bottom surface 12a and 12b are made up of the spill keyway 15a and the 15b of the V-shaped longitudinal extension of section.

Form cutting end 16a and 16b respectively at this end face opposite end of inserting.As shown in Figure 1, when inserting 11 when being installed on the tool-holder, two cutting ends can be used alternatingly, and two cutting end 16a and 16b have same structure, now are described with regard to one (16a).

The intersection of end face 12a and side periphery face 14a and 14b has formed first, second side cutting edge 17a and 17b, and two cutting edges extend to its medium position along inserting from its drift angle 18a and 18b respectively.The intersection of end face 12a and preceding peripheral surface 13a and between drift angle 18a and 18b, form a shaped form before cutting edge 19.In addition, cutting end 16a also should have the ridge peak 20 of a formation smear metal, and simultaneously, preceding peripheral surface 13a also has a concavity space 21.

Insert and all make the shape that end face 12a slightly is wider than bottom surface 12b.In addition, when mentioning that the end face, bottom surface 12a and the 12b that insert are protruding, concave shape respectively, be to be understood that protruding, concave surface that this formulation is suitable for being mentioned are continuous arc-shaped curved surface, as shown in Figures 2 and 3, perhaps above-mentioned concave surface is made up of a series of plane domain 23, as shown in Figure 4.

In addition, 11 have spill keyway 15a and 15b inserting shown in Fig. 2 to Fig. 4, should also be appreciated that, it can have equally and is suitable for one or two convex key of matching with corresponding keyway on the tool-holder jaw.

Fig. 5 represents how vice jaw surface 3a and 3b form hilt 6.As seen from the figure, for bottom surface 3b, it is made up of some facets zone, so as with insert go up facet regional form concave panel and match.

The structure in cutting edge 19 and concavity space 21 before 11 shaped forms that had of inserting, in order to guaranteeing when inserting 11 when being used for horizontal turning, contact between preceding cutting edge 19 and preceding peripheral surface 13 and the workpiece minimum, to reduce frictional resistance.

Referring now to Fig. 6, Fig. 7 and Fig. 8, illustrate a kind of according to the novel clamping mode of inserting of the invention process.

As can be seen from Fig. 6, the jaw 4 of tool-holder with 5 mutually along with hilt 6 on longitudinal axis line 24 in an acute angle link to each other and link to each other with tool-holder itself.In addition, can be clear that from Fig. 7 and Fig. 8 that pinching screw 8 is used for being fitted in the hole 25 with a supporting shoulder 26, the last face tilt of the relative jaw 4 of supporting shoulder.Guaranteed that like this when tightening pinching screw 8, screw closely rides over the top of circular bead surface, therefore, jaw 4 along the line 27 is downward-sloping, makes jaw point 28 apply maximum clamping force to 11 the end face inserted.Thereby guaranteed to insert 11 not reason upper jaw 4 clamp downwards and produce lateral displacement.

As can be seen, lower jaw 5 limits one at the exterior region of tool-holder and is at least 90 ° obtuse angle alpha, like this, makes lower jaw 5 produce one to being applied to the reaction force that increases progressively of lower jaw upper pulling force in using the cutter process from Fig. 1 and 5.Lower jaw has this structure at obtuse angle, by having inserting of special shape and be easy to realize according to of the present invention.

Claims (7)

1, a kind of metal cutting insert have end face, bottom surface, preceding peripheral surface, rear perimeter edge face and a pair of side periphery face.First cutting end of inserting of cutting edge forms at end face and preceding peripheral surface intersection before having; And the first and second side cutting edges form at end face and two side periphery face intersections respectively; Smear metal forms device and is positioned at the zone that is limited by cutting edge on the described end face, it is characterized in that described end face and bottom surface are convex and concave panel configuration with respect to insert X and Y respectively.

2, insert according to the metal cutting of claim 1, it is characterized in that described bottom surface is an arc-shaped curved surface.

3, insert according to the metal cutting of claim 1, it is characterized in that described bottom surface is formed by a series of plane domains.

4, insert according to any described metal cutting in the aforementioned claim, it is characterized in that described end face and bottom surface be made up of keyway.

5, insert according to any described metal cutting in aforementioned claim 1 or 2 or 3, it is characterized in that: described inserting has a pair of cutting end that is positioned at described end face opposite end.

6, insert according to any described metal cutting in aforementioned claim 1 or 2 or 3, it is characterized in that described preceding cutting edge tilts to the bottom surface with the full curve shape.

7, insert according to the metal cutting of claim 6, it is characterized in that: described front cutting edge region before described is spill.

Images