CN105436588A - Ball end mill - Google Patents
Ball end mill Download PDFInfo
- Publication number
- CN105436588A CN105436588A CN201510997286.XA CN201510997286A CN105436588A CN 105436588 A CN105436588 A CN 105436588A CN 201510997286 A CN201510997286 A CN 201510997286A CN 105436588 A CN105436588 A CN 105436588A
- Authority
- CN
- China
- Prior art keywords
- end mill
- ball end
- cutting
- edge
- cut sword
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
- B23C5/1009—Ball nose end mills
- B23C5/1018—Ball nose end mills with permanently fixed cutting inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/04—Angles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/04—Angles
- B23C2210/0407—Cutting angles
- B23C2210/0442—Cutting angles positive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/40—Flutes, i.e. chip conveying grooves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
- B23C2222/28—Details of hard metal, i.e. cemented carbide
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
The invention discloses a ball end mill which comprises a cylindrical cutter main body with the central shaft as a rotation center, wherein two or more chip grooves which extend to the cutting end part are formed in the outer circumference of the cutting part of the cutter main body and are intersected with two or more back cutter surfaces arranged on the cutting end part to form end cutting blades; the amount of the chip grooves is equal to that of the back cutter surfaces; the adjacent two back cutter surfaces are intersected to each other to form a transverse blade; the chip grooves are composed of a main groove and a deep groove; the main groove is intersected with the corresponding back cutter surface to form an arch-shaped cutting blade; the deep groove is composed of a small front cutter surface and an inclined plane; the small front cutter surface is intersected with the corresponding back cutter surface to form a plane cutting blade; the inclined plane is intersected with the arch-shaped bottom of the main groove; the depth of the inclined plane is larger than that of the main groove; the arch-shaped cutting blade is in smooth connection with the plane cutting blade to form an end cutting blade; and the end part of the transverse blade is intersected with the middle part of the plane cutting blade. The ball end mill can ensure the boundary strength of the transverse blade and improve the sharpness of the cutting blade and the chip discharge capacity.
Description
Technical field
The present invention relates to metal cutting process field, the ball end mill used when particularly relating to the formed machining for the part such as mold cavity and aerial blade.
Background technology
Usually, ball end mill is used in the machining of the profile surface of mould or space flight difficult-to-machine material blade profile profile root clean-up machining in large quantities, needs to use the bulb cutting edge of ball end mill bulb immediate vicinity to process (this processing mode abbreviation end mill) continually.
As everyone knows, general ball end mill cutting speed increases from bulb center successively to circumferential edge, and the linear velocity of axis place bulb cutting edge is zero.When using ball end mill end mill, be within the scope of 0 ° ~ 5 ° with central axis angle, what can be similar to thinks that bulb cutting edge is all processed carrying out extruding scraping within the scope of this, is improper machining.At present, this machining status is the typical process mode of mold cavity processing and aerial blade part back chipping.For ensureing the surface roughness of workpiece to be machined and easy to process, in the prior art, usually the bottom of the chip pocket of general ball end mill is made into the shape of convex Circular Nose Cutting Edge, and in bulb, is formed centrally chisel edge cuts.
General ball end mill drawback is now as follows:
First, general ball end mill is the cutting edge within the scope of 0 ° ~ 5 ° at the angle with central axis, due to the restriction of its helical structure, the cutting edge anterior angle within the scope of this is made to be change between-1 ° ~-10 °, so the anterior angle at the cutting edge place of ball end mill bulb immediate vicinity is negative value, add and cut not brisk man-hour, cause tool wear fast, cutter life is partially short.
Second, the bottom of the chip pocket of usual general ball end mill is made into the shape of convex Circular Nose Cutting Edge, because the chip space at its bulb immediate vicinity cutting edge place is narrow and small, cause the appearance at bulb central appendix cutting edge place bits, chip removal ability limited, cannot stock-removing efficiency be increased substantially, constrain the lifting of Tool in Cutting performance.
3rd, general ball end mill is formed centrally chisel edge in bulb, make to be formed centrally cutting edge in bulb, bulb center surface quality is also improved and improves, but can form chisel edge wedge angle at chisel edge boundary simultaneously, and the intensity on chisel edge border can not be guaranteed, when ball end mill end mill, easy generation stress is concentrated and tipping, reduces the working durability of ball end mill, affects the cutting stability of ball end mill simultaneously.
Summary of the invention
The technical problem to be solved in the present invention overcomes the deficiencies in the prior art, provides one can guarantee chisel edge boundary intensity, increases cutting edge sharpness, improves chip removal ability ball end mill.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of ball end mill, comprising with central shaft is the cylindric cutter body of pivot, the excircle of described cutter body cutting portion is provided with the chip pocket extending to cutting end part, formed crossing with the rear knife face set by cutting end part of described chip pocket holds cutting edge, described chip pocket and rear knife face are equipped with two or more, and quantity is equal, adjacent rear knife face intersects formation chisel edge, described chip pocket comprises major trough and deep trouth, described major trough is crossing with rear knife face forms arc edge, described deep trouth is made up of little rake face and tapered plane, described little rake face is crossing with rear knife face forms flush cut sword, described tapered plane is crossing with bottom the arc-shaped of major trough, and the tapered plane degree of depth is greater than the major trough degree of depth, described arc edge and the smooth connection of flush cut sword are formed holds cutting edge, described chisel edge end meets in the middle part of flush cut sword.
Further improvement as technique scheme:
The angle α of described tapered plane and central shaft is 45 ° ~ 70 °.
Described flush cut sword and arc edge intersect at intersection point, and described intersection point is 4 ° ~ 5 ° to the line of centre of sphere point of ball end mill and the angle γ of central shaft.
The angle β of described flush cut sword and chisel edge is 12 ° ~ 25 °.
Described cutter body to be Co content be 6% ~ 14% hard alloy cutter main body.
Compared with prior art, the invention has the advantages that:
Ball end mill of the present invention, its chip pocket comprises major trough and deep trouth, deep trouth is made up of little rake face and tapered plane, tapered plane is crossing with bottom the arc-shaped of major trough, and the tapered plane degree of depth is greater than the major trough degree of depth, makes chip pocket hold bits ability and strengthen, simultaneously due to the guiding function of this tapered plane, chip is rejected to outside cutter hub more easily by chip pocket, thus substantially increases the stock-removing efficiency of ball end mill; Little rake face is crossing with rear knife face forms flush cut sword, and this little rake face can increase the cutting edge anterior angle in this region, increases and cuts sharpness, tool wear is reduced, thus greatly improves the service life of ball end mill; Chisel edge end meets in the middle part of flush cut sword, is eliminated the wedge angle on chisel edge border by flush cut sword, enhances the wearability at chisel edge end points place, extends the working durability of ball end mill; The existence of the sword of flush cut simultaneously makes the Impact direction of chip at bulb place different, thus adds the chip breaking separating power of milling cutter, so make the iron filings disconnected discharge more smooth and easy.
Accompanying drawing explanation
Fig. 1 is the front view of ball end mill of the present invention.
Fig. 2 is that enlarged drawing is looked on a left side for ball end mill of the present invention.
Fig. 3 is the structure for amplifying schematic diagram of the bulb blade of ball end mill of the present invention.
Fig. 4 is the contrast schematic diagram (in Fig. 2 X enlarged drawing) at the bulb center of the present invention and prior art ball end mill.
Fig. 5 is the A-A cross-sectional view of Fig. 2.
Fig. 6 is that the chisel edge boundary horn structure of the present invention and prior art ball end mill contrasts schematic diagram.
In figure, each label represents:
1, cutter body; 2, chip pocket; 21, major trough; 22, deep trouth; 221, little rake face; 222, tapered plane; 4, chisel edge; 5, flush cut sword; 6, rear knife face; 7, arc edge; O, central shaft; P, intersection point; R, centre of sphere point.
Detailed description of the invention
Fig. 1 to Fig. 6 shows a kind of ball end mill embodiment of the present invention, the cylindric cutter body 1 that it is pivot that this ball end mill comprises with central shaft O, the excircle of cutter body 1 cutting portion is provided with the chip pocket 2 extending to cutting end part, formed crossing with the rear knife face 6 set by cutting end part of chip pocket 2 holds cutting edge, chip pocket 2 and rear knife face 6 are equipped with two or more, and quantity is equal, adjacent rear knife face 6 intersects formation chisel edge 4, chip pocket 2 comprises major trough 21 and deep trouth 22, major trough 21 is crossing with rear knife face 6 forms arc edge 7, deep trouth 22 is made up of with tapered plane 222 little rake face 221, little rake face 221 is crossing with rear knife face 6 forms flush cut sword 5, tapered plane 222 is crossing with bottom the arc-shaped of major trough 21, and tapered plane 222 degree of depth is greater than major trough 21 degree of depth, arc edge 7 is formed with flush cut sword 5 smooth connection holds cutting edge, chisel edge 4 end meets in the middle part of flush cut sword 5.Ball end mill of the present invention, tapered plane 222 degree of depth is greater than major trough 21 degree of depth, make chip pocket 2 hold bits ability to strengthen, simultaneously due to the guiding function of this tapered plane 222, chip is rejected to outside cutter body 1 more easily by chip pocket 2, thus substantially increases the stock-removing efficiency of ball end mill; Little rake face 221 can increase the cutting edge anterior angle in this region, increases and cuts sharpness, tool wear is reduced, thus greatly improves the service life of ball end mill; Flush cut sword 5 eliminates the wedge angle on chisel edge 4 border, enhances the wearability at chisel edge 4 end points place, extends the working durability of ball end mill; The existence of the sword of flush cut simultaneously 5 makes the Impact direction of chip at bulb place different, thus adds the chip breaking separating power of milling cutter, so make the iron filings disconnected discharge more smooth and easy.
Flush cut sword 5 and arc edge 7 intersect at intersection point P, and intersection point P is 4 ° ~ 5 ° to the line of centre of sphere point R of ball end mill with the angle γ of central shaft O, and the cutting edge anterior angle within the scope of this greatly, is cut brisk; Flush cut sword 5 is 12 ° ~ 25 ° with the angle β of chisel edge 4; Tapered plane 222 is 45 ° ~ 70 ° with the angle α of central shaft O; Cutter body 1 to be Co content be 6% ~ 14% hard alloy cutter main body.In the present embodiment, γ is 5 °, and β is 18 °, and α is 50 °, and Co content is 12%.
Fig. 4 is the contrast schematic diagram at the bulb center of the present invention and prior art ball end mill, in figure, dotted line represents the cutting edge trend of prior art ball end mill, dash area represents the chip space of increase, it clearly illustrates chip space of the present invention and obviously increases, the appearance chip removal ability of ball end mill strengthens further, higher cutting parameter can be taked, so stock-removing efficiency also promotes further.
Fig. 6 is that the chisel edge boundary horn structure of the present invention and prior art ball end mill contrasts schematic diagram, the chisel edge boundary chisel edge wedge angle 8 of prior art ball end mill clearly (as shown in phantom in Figure 6), and chisel edge border of the present invention eliminates chisel edge wedge angle 8, enhance the wearability at chisel edge 4 end points place, substantially prolongs the working durability of ball end mill.
Be described further below in conjunction with the performance of contrast test to slotting cutter of the present invention.
Slotting cutter of the present invention and existing general ball slotting cutter contrast, under end mill machining condition, carry out contrast test:
Cutting parameter: Vc=150m/min, fz=0.175mm/z, Ap=0.15mm, Ae=0.2mm;
Workpiece material: NAK80;
The type of cooling: water-cooled;
Tool life criteria: Part Surface Roughness is less than Ra0.9;
Machined 6h with ball end mill of the present invention, cutting edge uniform wear, surface roughness is qualified, and general ball end mill only machined 4h, and chisel edge border cutting edge collapses scarce, and all the other cutting edge serious wear, surface roughness is overproof.
Although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention.Any those of ordinary skill in the art, when not departing from technical solution of the present invention scope, can utilize the technology contents of above-mentioned announcement to make many possible variations and modification to technical solution of the present invention, or being revised as the Equivalent embodiments of equivalent variations.Therefore, every content not departing from technical solution of the present invention, according to the technology of the present invention essence to any simple modification made for any of the above embodiments, equivalent variations and modification, all should drop in the scope of technical solution of the present invention protection.
Claims (6)
1. a ball end mill, the cylindric cutter body (1) that to comprise with central shaft (O) be pivot, the excircle of described cutter body (1) cutting portion is provided with the chip pocket (2) extending to cutting end part, described chip pocket (2) holds cutting edge with crossing formation of rear knife face (6) set by cutting end part, described chip pocket (2) and rear knife face (6) are equipped with two or more, and quantity is equal, adjacent rear knife face (6) intersecting forms chisel edge (4), it is characterized in that: described chip pocket (2) comprises major trough (21) and deep trouth (22), described major trough (21) is crossing with rear knife face (6) forms arc edge (7), described deep trouth (22) is made up of little rake face (221) and tapered plane (222), described little rake face (221) is crossing with rear knife face (6) forms flush cut sword (5), described tapered plane (222) is crossing with bottom the arc-shaped of major trough (21), and tapered plane (222) degree of depth is greater than major trough (21) degree of depth, described arc edge (7) is formed with flush cut sword (5) smooth connection holds cutting edge, described chisel edge (4) end meets at flush cut sword (5) middle part.
2. ball end mill according to claim 1, is characterized in that: described tapered plane (222) is 45 ° ~ 70 ° with the angle α of central shaft (O).
3. ball end mill according to claim 1 and 2, it is characterized in that: described flush cut sword (5) and arc edge (7) intersect at intersection point (P), and described intersection point (P) is 4 ° ~ 5 ° to the line of the centre of sphere point (R) of ball end mill and the angle γ of central shaft (O).
4. ball end mill according to claim 1 and 2, is characterized in that: described flush cut sword (5) is 12 ° ~ 25 ° with the angle β of chisel edge (4).
5. ball end mill according to claim 3, is characterized in that: described flush cut sword (5) is 12 ° ~ 25 ° with the angle β of chisel edge (4).
6. ball end mill according to claim 1 and 2, is characterized in that: described cutter body (1) to be Co content be 6% ~ 14% hard alloy cutter main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510997286.XA CN105436588B (en) | 2015-12-28 | 2015-12-28 | A kind of ball end mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510997286.XA CN105436588B (en) | 2015-12-28 | 2015-12-28 | A kind of ball end mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105436588A true CN105436588A (en) | 2016-03-30 |
| CN105436588B CN105436588B (en) | 2018-05-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510997286.XA Active CN105436588B (en) | 2015-12-28 | 2015-12-28 | A kind of ball end mill |
Country Status (1)
| Country | Link |
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| CN (1) | CN105436588B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106513807A (en) * | 2016-12-13 | 2017-03-22 | 株洲钻石切削刀具股份有限公司 | Ball-nose end milling cutter |
| CN107322064A (en) * | 2017-07-28 | 2017-11-07 | 浙江神钢赛欧科技有限公司 | A kind of two general ball cutters of sword high rigidity |
| JP2018083245A (en) * | 2016-11-22 | 2018-05-31 | 三菱日立ツール株式会社 | Two-blade ball end mill |
| CN108580999A (en) * | 2018-05-14 | 2018-09-28 | 哈尔滨理工大学 | A kind of special rose cutter of Milling of Titanium Alloy thin-walled parts |
| CN109262038A (en) * | 2018-10-29 | 2019-01-25 | 株洲钻石切削刀具股份有限公司 | A kind of multi-functional rose cutter |
| CN109719331A (en) * | 2019-03-12 | 2019-05-07 | 哈尔滨理工大学 | A kind of titanic alloy machining indexable rose cutter of sword that interlocks |
| CN113042794A (en) * | 2021-03-29 | 2021-06-29 | 东莞市益松数控科技有限公司 | Milling cutter, shoe tree processing equipment and shoe tree processing method |
| CN115135440A (en) * | 2020-02-28 | 2022-09-30 | 京瓷株式会社 | End mill and method for manufacturing cut product |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0596416A (en) * | 1991-10-03 | 1993-04-20 | Hitachi Tool Eng Ltd | Ball end mill |
| JPH11156624A (en) * | 1997-11-21 | 1999-06-15 | Mitsubishi Materials Corp | Throw away type ball end mill |
| CN1942277A (en) * | 2004-04-20 | 2007-04-04 | Osg株式会社 | Ball end mill |
| CN101239406A (en) * | 2008-03-11 | 2008-08-13 | 贵州大学 | Bulb slotting cutter and its abrasive machining four-shaft linkage equipment |
| CN101502894A (en) * | 2009-03-13 | 2009-08-12 | 湖南大学 | Milling cutter for high speed machining of non-metallic material |
| CN102596464A (en) * | 2009-11-17 | 2012-07-18 | 钴碳化钨硬质合金公司 | Optimization of cutting edge geometry in rounded nose end mills |
| CN203679383U (en) * | 2014-01-10 | 2014-07-02 | 西安陕鼓动力股份有限公司 | Cylindrical ball-end milling cutter for cutting Martensite |
-
2015
- 2015-12-28 CN CN201510997286.XA patent/CN105436588B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0596416A (en) * | 1991-10-03 | 1993-04-20 | Hitachi Tool Eng Ltd | Ball end mill |
| JPH11156624A (en) * | 1997-11-21 | 1999-06-15 | Mitsubishi Materials Corp | Throw away type ball end mill |
| CN1942277A (en) * | 2004-04-20 | 2007-04-04 | Osg株式会社 | Ball end mill |
| CN101239406A (en) * | 2008-03-11 | 2008-08-13 | 贵州大学 | Bulb slotting cutter and its abrasive machining four-shaft linkage equipment |
| CN101502894A (en) * | 2009-03-13 | 2009-08-12 | 湖南大学 | Milling cutter for high speed machining of non-metallic material |
| CN102596464A (en) * | 2009-11-17 | 2012-07-18 | 钴碳化钨硬质合金公司 | Optimization of cutting edge geometry in rounded nose end mills |
| CN203679383U (en) * | 2014-01-10 | 2014-07-02 | 西安陕鼓动力股份有限公司 | Cylindrical ball-end milling cutter for cutting Martensite |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018083245A (en) * | 2016-11-22 | 2018-05-31 | 三菱日立ツール株式会社 | Two-blade ball end mill |
| CN106513807A (en) * | 2016-12-13 | 2017-03-22 | 株洲钻石切削刀具股份有限公司 | Ball-nose end milling cutter |
| CN106513807B (en) * | 2016-12-13 | 2018-08-31 | 株洲钻石切削刀具股份有限公司 | A kind of ball end mill |
| CN107322064A (en) * | 2017-07-28 | 2017-11-07 | 浙江神钢赛欧科技有限公司 | A kind of two general ball cutters of sword high rigidity |
| CN108580999A (en) * | 2018-05-14 | 2018-09-28 | 哈尔滨理工大学 | A kind of special rose cutter of Milling of Titanium Alloy thin-walled parts |
| CN109262038A (en) * | 2018-10-29 | 2019-01-25 | 株洲钻石切削刀具股份有限公司 | A kind of multi-functional rose cutter |
| CN109719331A (en) * | 2019-03-12 | 2019-05-07 | 哈尔滨理工大学 | A kind of titanic alloy machining indexable rose cutter of sword that interlocks |
| CN115135440A (en) * | 2020-02-28 | 2022-09-30 | 京瓷株式会社 | End mill and method for manufacturing cut product |
| CN113042794A (en) * | 2021-03-29 | 2021-06-29 | 东莞市益松数控科技有限公司 | Milling cutter, shoe tree processing equipment and shoe tree processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105436588B (en) | 2018-05-29 |
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