CN1030694C - Circumference milling blade - Google Patents

Circumference milling blade Download PDF

Info

Publication number
CN1030694C
CN1030694C CN 90108183 CN90108183A CN1030694C CN 1030694 C CN1030694 C CN 1030694C CN 90108183 CN90108183 CN 90108183 CN 90108183 A CN90108183 A CN 90108183A CN 1030694 C CN1030694 C CN 1030694C
Authority
CN
China
Prior art keywords
blade
cutting edge
angle
rear flank
flank face
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN 90108183
Other languages
Chinese (zh)
Other versions
CN1059488A (en
Inventor
阿米尔·萨特兰
卡罗尔·斯米洛维奇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iscar Ltd
Original Assignee
Iscar Hartmetall GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Iscar Hartmetall GmbH filed Critical Iscar Hartmetall GmbH
Priority to CN 90108183 priority Critical patent/CN1030694C/en
Publication of CN1059488A publication Critical patent/CN1059488A/en
Application granted granted Critical
Publication of CN1030694C publication Critical patent/CN1030694C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Landscapes

  • Milling Processes (AREA)

Abstract

An insert for a peripheral hobbing cutter with a cylindrical body, having a side cutting edge formed between a front face and a side rear face, and a side skirt formed between said side rear face and a base face, the side rear face being composed of first and second partial rear faces which are adjacent from a lead-in end of the insert and which are formed between the first and second partial rear facesA first position at its middle position to a second position intersecting said cutting edge and adjacent the trailing end of the blade, intersecting along an intersection line extending along the side flanks, which are substantially planar and at an angle to each other such that the leading end formed with respect to the cylindrical body is at the side relief angle (gamma) of the bladeA) Substantially equal to the flank clearance angle (gamma) of the trailing portion bladeB)。

Description

Cutting insert
The present invention relates to a kind of peripheral milling blade, it is used for the circumference milling cutter, this milling cutter comprises that is a columniform knife bar substantially, the groove that distributes on one or more circumference is arranged on the knife bar, the replaceable hard metal blade of respective numbers removably is housed respectively in the groove, and above-mentioned one or each groove have also constituted chip area at every blade front end.
The blade that is used for milling cutter is made up of a multiple edge body usually, and it has a straight basal plane, extends each one back, side by basal plane, and intersect a back and a top front.This blade has a cutting edge at least, and this cutting edge is to intersect the cutting edge that produces by the front and back to form.
Blade is to be contained in like this on the cutter; Cutting edge is positioned on the circular Cutting trajectory of cutter, and with rotation tilt an angle, i.e. axial inclination.
The size of axial inclination all directly exerts an influence in the durability of cutter duration of work to its stability and cutting edge.Always say, the axial inclination that blade is had try one's best big simultaneously again with avoid causing weakening on the cutter structure require consistently, be favourable.
As everyone knows, the relief angle that the blade of milling cutter adopts wants big, especially when milling cutter has the minor diameter Cutting trajectory, all the more so relatively than the relief angle of fixed cutting tool.In addition, when cutter is used for milling such as the contour toughness material of aluminium, during than materials such as milling steel parts, desired relief angle even also big.But strengthen the weakening that relief angle can cause cutting edge, therefore have a relief angle limiting value.On the other hand, the meeting that reduces of relief angle numerical value increases the wear surface that blade contacts with workpiece, therefore wishes to have a relief angle lower limit again.Always say that the relief angle value is by the workpiece material, form the material of cutting edge, and the decision of the Cutting trajectory diameter of cutter.Therefore, when workpiece is the hard toughness material, general desirable 12 ° to 20 ° of the relief angle of high-speed steel tool, desirable 8 ° to 12 ° of hard alloy cutter.On the other hand, when workpiece is a mild steel, during materials such as cast iron, relief angle is actual to can be as big as 20 °.
It is found that for milling cutter, because blade is to be mounted to the cutter longitudinal axis to become an axial inclination, it is more much bigger than the cutting edge relief angle of tail end that edge clearance angle is cut in the importing end-grain cutting.Suppose the minimum relief angle that the selected relatively little relief angle reality of blade tail end may adopt exactly.People recognize that also it is too big importing the end relief angle, and it can cause increasing cutting edge in the weakened danger of this point, thus and reduction cutter life.
Japanese patent application 52-85790 number a kind of cutting tip that is used for the circumference milling cutter is disclosed, do not damage the milling cutter of using this blade in order very freely to select axial rake and relief angle, the rear flank face of this blade is made up of first and second fens rear flank faces, they are essentially the plane, mutually at angle.But this kind blade does not solve foregoing problem.
German utility model No.C8915088.0 (MINA) discloses a kind of cutter blade, and it has a rear flank face, and this rear flank face has a plurality of branch back of arranging by certain angle.Bright reining in (Mina) explains that the purpose that the back is divided into some minutes back is to promote to have the use (like this increasing angles be considered to improve milling efficiency beneficial) of larger axis to the milling cutter of the blade of inclination angle and radial rake.Along with the increase of axial inclination, blade basicosta afterbody is more and more near the circular Cutting trajectory of cutter, and danger also produces thereupon, so that in fact basicosta can run into workpiece, has produced the interference in the milling process thus.Brightly rein in proposition, for overcoming this danger, and can obtain increasing simultaneously the benefit of axial inclination, can form the rear flank face like this; Make the branch rear flank face adjacent all the other rear flank faces adjacent arrange that by an angle blade basicosta just inwardly separates from the circular Cutting trajectory of cutter like this with cutting edge with the blade basicosta.
Therefore, the object of the present invention is to provide a kind of peripheral milling blade, can strengthen when side is cut, bearing the intensity at big stress and cutting force position.
According to peripheral milling blade of the present invention, it is used for the circumference milling cutter, this milling cutter has a cylinder shape knife rod and the dismountable blade along circumference of a slice at least, this blade has a side cutting edge that is formed between front and the rear flank face, described rear flank face is made up of first and second fens rear flank faces, they intersect on an intersection, this intersection is from the primary importance adjacent with the importing end of blade, to the second place adjacent with the blade tail end, extend along described rear flank face, described minute back is the plane substantially, mutually at angle, the back was more sharp-pointed than the angle that forms between described front and the first fen back adjacent to described cutting edge with respect to the described angle that forms previously in second minute, it is characterized in that, was importing the blade side relief angle (γ that the position, end forms with respect to cylinder shape knife rod A) equal end edge region blade side relief angle (γ substantially C).
Best, blade is a double-edged razor blade, cutting edge and relative side cutting edge before and after promptly being formed with, with by the clamped position of blade in cutter hub of turning round, above-mentioned blade tail end just becomes it and imports end, conversely situation too, at this moment each rear flank face all is formed with above-mentioned minute back, the corresponding intersection of every pair of back tilts in the opposite direction.
By blade structure of the present invention, can guarantee that blade has bigger radial rake, and the unlikely weakening that causes cutting edge thus.This is by guaranteeing that blade imports the relief angle of holding and can not realize too greatly.Like this, the side cutting edge is accurately strengthened at the position that it bears maximum stress and cutting force.Simultaneously, owing to have nethermost minute back (being formed between intersection and the basicosta), can guarantee that again blade can be clamped in the common knife bar effectively, wherein knife bar bearing-surface and these are orientated routinely and keep in touch the branch back of definite size.
With regard to blade of the present invention, the branch rear flank face adjacent with cutting edge but chosen like this; Angle, rear flank (cylinder shape knife rod relatively) is essentially identical at the position, importing end and the tail end position of blade.Its whole these specifications of advantage all have explanation.As for all the other rear flank faces adjacent with the blade basicosta, the present invention does not plan its form of conversion, only requires that it can firmly be installed on the cutter hub to get final product.
In order to understand the present invention better, and how explanation the present invention to realize, refers now to following accompanying drawing, wherein:
Fig. 1 is the perspective view of the milling cutter of a kind of form known of being suitable for of the present invention;
Fig. 2 is the part diagrammatic side view of the cutter simplified, shows that known insert is how to be contained in position on the cutter hub and on cutter hub;
Fig. 3 is the cutaway view of blade shown in Figure 2 along the III-III line, and is superimposed on the respective circular Cutting trajectory.
Fig. 4 is the similar cutaway view along the IV-IV line;
Fig. 5 is the cutter diagrammatic side view of having simplified, and shows how blade of the present invention is installed on it;
Fig. 6 is the bottom view of blade of the present invention;
Fig. 7 is the top view of blade shown in Figure 6;
Fig. 8 is the side view of Fig. 6 and blade shown in Figure 7;
Fig. 9 and Figure 10 are that a side of blade shown in Figure 8 is respectively along the cutaway view of IX-IX or X-X line; And
Figure 11,12 and 13 be milling cutter shown in Figure 5 and blade respectively along XI-XI, the cutaway view of XII-XII and XIII-XIII line, superimposed on the respective circular Cutting trajectory.
Fig. 1 is the relevant a kind of hob of the present invention.As shown in the figure, this milling cutter comprises a cylindrical cutter body 1, is distributed with groove 2 to basic one-tenth equal angles on it, and each groove comprises an insert supporting seat 3, and a removable hard metal blade 4 releasably is installed on it.The remainder of groove has constituted chip pocket 5.Cutter hub suitably is contained on the lathe (not shown), thereby can rotate around longitudinal axis 6.
Before being described in detail most preferred embodiment of the present invention, earlier with reference to figure 2,3 and 4, they are explained some geometric parameter of this class milling cutter that the present invention is suitable for.But what adopted is ordinary blade.Diagrammatic side view shown in Figure 2 has been done simplification for ease of explanation, wherein only expresses the situation that a slice blade is installed.
As shown in Figure 2, blade 11 is installed in suitable all groove of cylindrical cutter body 1, and blade 11 has a long cutting edge 12 parallel with the corresponding edge 13 of blade bearing.This cutting edge 12 forms angle α with axis 6 0
Referring to Fig. 3 and 4, can find out the appropriate section cutaway view (corresponding to introduction part and the afterbody of blade) of blade 11 here along III-III and IV-IV line, respectively with the cutting edge that is positioned on the corresponding transversal on the circular trace of respective point coincide.Shown in Fig. 3 and 4, blade 11 forms part by a back 14 and one and grows up to the front 15 of considering groove 16 to be worth doing and constitute.Cutting edge 12 is formed on next 14 and the intersection place of front 15, corresponding transversal III-III and IV-IV and cutting edge 12 respectively the point 12 shown in accompanying drawing 3 and 4 ' with 12 " locate to intersect.Along with the rotation of cutter, the point 12 on the cutting edge 12 ' mark circular trace shown in Figure 3 17 ', put 12 " then marking track shown in Figure 4 17 ".
As shown in Figure 3, back 14 and circle 17 ' at point 12 ' tangent line 19 of locating ' formed relief angle γ '.As shown in Figure 4, back 14 and tangent line 19 " between formed relief angle γ ".Remembered above-mentioned consideration about best relief angle, be easy to find out from accompanying drawing 3 and 4, although relief angle γ " perhaps (being positioned at the afterbody of blade; see Fig. 4) have certain effective best minimum of a value; corresponding relief angle γ ' (being positioned at the introduction part of blade; see Fig. 3) has excessive value, and this position that to be blade bear maximum cutting force.This excessive relief angle can cause the weakening of cutting edge, causes the heavy cut load to do the danger that fracture appears in the time spent.
Illustrate after the geometric parameter and latent defect of existing blade in such hob that the present invention is suitable for, go through most preferred embodiment of the present invention now again.Referring to relevant therewith accompanying drawing 5-13, they are described the blade structure of the present invention and the geometric parameter of the hob 20 that is used to have cylindrical cutter body 20a.
Shown in Fig. 5,6 and 7, blade 21 is installed on the seat 21a that is formed on the groove 21b that is positioned at cutter hub 21c.
Blade 21 is positioned at the position that relative tool bodies longitudinal axis becomes axial inclination α, and by accompanying drawing 6 and 7 as can be seen, it is by 22, one the following basal planes 23 in a front, and front-back 24 and back 25, back and rear flank face 26a and 26b form.Side cutting edge (27a, 27b) forms respectively between rear flank face (26a, 26b) and the last front 22.This rear flank face 26a and 26b terminate in the basal plane 23 at base 23a and 23b place respectively.Front and back cutting edge 28 and 29 is respectively formed between front-back 24 and last front 22 and back 25, back and the last front 22.The centre bore 30 that forms on the blade 21 is for screw blade 21 being clamped in the last usefulness of tool bodies 21c.
Rear flank face 26a is by first and second fens back 31 ' a and 31a " a forms; they intersect at intersection 32a; this intersection from blade import end adjacent and be positioned at the primary importance 33 of this importings end '; to cutting edge 27a the crossing and second place 33 adjacent with the tail end of blade ", extend along rear flank face 26a." a is the plane, and at an angle to each other each other for two branch back 31 ' a and 31a.
Similarly, also " b forms rear flank one-tenth 26a, and they intersect at intersection 32b, and the incline direction of intersection 32a and 32b is opposite by two branch back 31 ' b and 31.
Fig. 9 clearlys show, has different gradients separately along transversal IX-IX branch back, and Figure 10, because it is along passing intersection 32a and cutting the position 33 that sword 27a intersects " transversal X-X intercepting; only show a single back gradient, the gradient of this back is identical with the inclination of branch back along its total length.
Fig. 7 and Fig. 9 will remake reference down when explaining the position of determining branch back 31 ' a.
Now referring to accompanying drawing 11,12 and 13, they are respectively XI-XI, XII-XII along Fig. 5 and the phantom of XIII-XIII line intercepting, are with being positioned at the mode that the circular trace of the each point on the intersection separately overlaps and representing respectively with on the cutting edge 25.
As shown in figure 11, relief angle γ ABe formed between the tangent line of branch back 31 ' a and the some 37a circular trace 36a of place.At this position, divide the height ha maximum of back 31 ' a.Similarly, the accompanying drawing 12 along cutting edge 25 mid point 37b intercepting shows relief angle γ BBe formed between branch back 31 ' a and the tangent line 35b.The height hb that divides next 31 ' a at this position is less than ha.At last, at the rear portion point 37c place of cutting edge 27a, relief angle γ CBe formed on single back 31 " between a and the tangent line 35c.31 ' a no longer occurs in this branch back, position.
Blade 22 imports the relief angle γ that end divides back 31 ' a AElect relief angle γ as with the single back of blade tail end CSubstantially equal, like this, the cutting edge that imports end just can suitably be strengthened, and acts on the sizable cutting force that imports end to bear.As can be seen, although γ A=γ B, be positioned at the γ of cutting edge midpoint CBut than γ AOr γ BAll little.However, people still find, bear the choosing of relief angle of the cutting edge lead-in portion of maximum cutting force, make it to equate with cutting edge tail end relief angle substantially, strengthen the most responsive part of cutting edge, thereby prolonging the cutter life aspect, and be effective.
Also can know from accompanying drawing 11,12 and 13 and to find out, owing to be provided with branch back 31 ' a, might adopt the blade (being big anterior angle cutting edge) of big radial rake, not cause the importing end cutting edge that bears maximum stress and cutting edge power to be impaired to dangerous degree simultaneously.
To reach the parameter of above-mentioned effect, must remember following given factor in order to determine the design of domination back and branch back thereof:
(ⅰ) predetermined cutter average diameter D A
(ⅱ) predetermined shaft is to inclined angle alpha 0
(ⅲ) minimum relief angle γ M(by the wearing character and the workpiece material decision of cutter).
On the basis of these factors, just can determine best relief angle γ 0, this reality is the blade tail end relief angle (γ in the present embodiment just C).
In an instantiation,
D A=40 millimeters,
α 0＝75°
γ M＝6°
If as shown in the accompanying drawing 6, basal plane 23, before and after back 24 and 25 and divide rear flank face 31 " a and 31 " b to keep the shape of basic symmetry, last front 22, cutting edge 27a and 27b and branch back 31 ' a and 31 ' b can be envisioned as with basal plane 23 and " reverse ", like this, as shown in Figure 7, corresponding to the chain-dotted line 41 ' a on original border of the basal plane 23 of the imagination " position of a that just moves on to dotted line 41.Similarly, as shown in Figure 9, just move on to the position of branch back 31 " parallel surface of a and parallel minute present back 31 " a corresponding to the original rear flank face of imaginary blade.
Because kept the basal plane and the following minute back of original symmetric arrangement, blade can be clamped on the conventional clamping area of common cutter hub easily.
In addition, although the present invention specifies in conjunction with the double-edged razor blade with an offside cutting edge and front and back cutting edge, the present invention is suitable for too to single-edge blade.

Claims (3)

1. a peripheral milling blade (21), it is used for the circumference milling cutter, this milling cutter has a cylinder shape knife rod (21c) and the dismountable blade along circumference of a slice (21) at least, this blade (21) has a side cutting edge (27) that is formed between front (22) and the rear flank face (26), described rear flank face (26) by first and second fens rear flank faces (31 '; 31 ") form; they are gone up at an intersection (32) and intersect, and this intersection (32) is from the primary importance (33 ') adjacent with the importing end of blade (21), to the second place (33 ") adjacent with blade (21) tail end, extend along described rear flank face (26), described minute back (31 '; 31 ") be the plane substantially; mutually at angle; (angle that 31 ") form with respect to described front (22) is more sharp-pointed than the angle that forms between described front (22) and first minute back (31 ') adjacent to described cutting edge (27) for second fen back, it is characterized in that, importing the blade side relief angle (γ that the position, end forms with respect to cylinder shape knife rod (21c) A) equal end edge region blade side relief angle (γ substantially C).
2. according to the described blade of claim 1 (21), it is characterized in that, it has basic is the shape of parallelepiped, and has an offside cutting edge (27a, 27b), they are positioned at the relative both sides of blade, and be formed between corresponding rear flank face (31a, 31b) and described front (22), each side (31a, 31b) be formed with corresponding minute rear flank face (31 ' a, 31 " b; 31 ' b, 31 " b), they have reversed dip corresponding intersection (32a, 32b).
3. according to the described blade of claim 2 (21), it is characterized in that, cutting edge (28,29) before and after it also has, they are respectively formed between described front (22) and the described front-back (24,25).
CN 90108183 1990-09-06 1990-09-06 Circumference milling blade Expired - Lifetime CN1030694C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 90108183 CN1030694C (en) 1990-09-06 1990-09-06 Circumference milling blade

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 90108183 CN1030694C (en) 1990-09-06 1990-09-06 Circumference milling blade

Publications (2)

Publication Number Publication Date
CN1059488A CN1059488A (en) 1992-03-18
CN1030694C true CN1030694C (en) 1996-01-17

Family

ID=4880873

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 90108183 Expired - Lifetime CN1030694C (en) 1990-09-06 1990-09-06 Circumference milling blade

Country Status (1)

Country Link
CN (1) CN1030694C (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5807031A (en) * 1995-03-10 1998-09-15 Mitsubishi Materials Corp. Throw-away tip and throw-away type cutter
DE19611276C1 (en) * 1996-03-22 1997-03-20 Walter Ag Rotary groove-cutting tool
US6939090B1 (en) 1999-08-17 2005-09-06 Mitsubishi Materials Corporation Throwaway tip and throwaway-type cutting tool
IL144138A (en) * 2001-07-04 2006-06-11 Daniel Ulianitsky Milling cutter and cutting insert therefor
GB0318501D0 (en) * 2003-08-07 2003-09-10 Exactaform Cutting Tools Ltd Cutting tool
DE10338784B4 (en) * 2003-08-23 2005-08-25 Depo Gmbh & Co.Kg. Cutting plate for a milling cutter
DE102011012140B4 (en) * 2011-02-24 2020-07-09 Kennametal Inc. Milling cutters, in particular ball end mills
US10035198B2 (en) * 2011-11-15 2018-07-31 Kennametal Inc. Double-sided, indexable cutting insert with ramping capability and cutting tool therefor
EP3009217B1 (en) * 2014-10-13 2017-07-05 Sandvik Intellectual Property AB Tangential cutting insert and milling tool comprising such a cutting insert
EP3736071B1 (en) * 2019-05-09 2022-03-16 AB Sandvik Coromant Solid end mill

Also Published As

Publication number Publication date
CN1059488A (en) 1992-03-18

Similar Documents

Publication Publication Date Title
JP2580376B2 (en) Outer rotary milling cutter
RU1807920C (en) Cutting insert
JP2587549B2 (en) Milling cutting inserts
CN1046885C (en) A chip cutting tool
CN1030694C (en) Circumference milling blade
EP0577011B1 (en) Throw away insert and face milling cutter
US4294565A (en) Indexable finishing insert for a milling cutter
CN1116950C (en) Cutting tool and cutting insert
US4930945A (en) Insert rotary cutter
US4681486A (en) Triangular cutting tool insert having cutting edges with recesses
CA1099501A (en) Cutting tool and insert for same
US5924824A (en) Cutting insert
US5017055A (en) Indexable cutter insert
CN1211207A (en) A cutting insert with a rounded corner
CN1484563A (en) Indexable Milling insert
CA2178245C (en) Cutting insert and cutter for milling
US20090232609A1 (en) Cutting insert
JP2000513659A (en) Inserts with lands of varying width
US5692860A (en) On-edge end milling cutter and insert
KR100300007B1 (en) Improved milling cutting insert
CN1024768C (en) Cutting insert for milling cutting tool
CN1024767C (en) Cutting insert for milling cutting tool
CA1260689A (en) On-edge end-milling insert
CN1309520C (en) cutting insert
AU686941B2 (en) Helical cutting insert with offset cutting edges

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C15 Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993)
OR01 Other related matters
ASS Succession or assignment of patent right

Owner name: ISCAR LTD

Free format text: FORMER OWNER: ISCAR LTD.

Effective date: 20061020

C41 Transfer of patent application or patent right or utility model
C56 Change in the name or address of the patentee

Owner name: ISCAR LTD.

Free format text: FORMER NAME OR ADDRESS: ISCAR LTD

CP03 Change of name, title or address

Address after: Israel toffan

Patentee after: Iscar Ltd.

Address before: Israel toffan

Patentee before: Iscar Ltd.

TR01 Transfer of patent right

Effective date of registration: 20061020

Address after: Israel toffan

Patentee after: Iscar Ltd.

Address before: Israel Mihdhar Te Finn

Patentee before: Iscar Ltd.

C17 Cessation of patent right
CX01 Expiry of patent term

Expiration termination date: 20100906

Granted publication date: 19960117