CA2534144A1 - Milling cutter - Google Patents
Milling cutter Download PDFInfo
- Publication number
- CA2534144A1 CA2534144A1 CA 2534144 CA2534144A CA2534144A1 CA 2534144 A1 CA2534144 A1 CA 2534144A1 CA 2534144 CA2534144 CA 2534144 CA 2534144 A CA2534144 A CA 2534144A CA 2534144 A1 CA2534144 A1 CA 2534144A1
- Authority
- CA
- Canada
- Prior art keywords
- milling cutter
- head
- workpiece
- axis
- tapered
- 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.)
- Abandoned
Links
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2220/00—Details of milling processes
- B23C2220/36—Production of grooves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2265/00—Details of general geometric configurations
- B23C2265/08—Conical
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
A milling cutter (10) has an axis (X), a head (11) and a body (12). The head (11) has multiple blades extending transversely out from the axis (X) and each blade has a cutting surface (111) parallel to the axis (X). The body (12) is formed integrally on and extends from the head (11), has a top end and multiple side edges and is tapered from the head (11) to the top end. The milling cutter (10) is able to define recesses or cutouts in a workpiece (20) without causing a rapid rise in temperature of the milling cutter (10) because the tapered body (12) never contacts the workpiece (20) during the cutting process.
Description
l 1VIILLXNG CUTTER
2 BACK!2RO TND OF' I,F , TxVENTION
3 1. Field of the Invention 4 The present invention relates to a milling cutter, and more particularly to a milling cutter that has a head always contacting the surface of a workpiece when the 6 milling cutter operates and a body extending from the head and tapered.
7 2. Description of the Prior Art 8 Milling machines generaAy have a milling cutter used to cut a workpiece.
With 9 reference to Fig. 6, a conventional milling cutter (80) has a longitudinal body, a free end (A), a fixed end mounted to a milling machine, a cross section and a side cutting face.
11 Thc sidc cutting face has a length (h) and the cross section of the body is uniform in the 12 extent of the length (h). Therefore, wben the conventional milling cutter (80) cuts a 13 workpiece (90), the side cutting face (h) continuously engages with side faces of the 14 workpiece (90) so that the temperature of the milling cutter (80) increases rapidly during the operation. The milling cuter becomes easily damaged due to high temperature. In 16 order to overcome the shortcoming of the conventional milling cutter (80) as shown in 17 Fig. 6, an inYproved milling cutter (80a) is invented and introduced to the market, which 18 is shown in Fig. 7. The iinproved milling cutter (80a) has a body (C), a free end (8) and 19 a fixed end. However, the body (C) is tapered from the free end (B) to the fixed end, which means that the diameter of the free end is larger than that of other segment of the 21 body (C). When the milling cutter (80a) cuts a workpiece (M), the free end contacts the 22 side face of the workpiece at a point yet the tapered body (C) does not contact the side 23 face of the workpiece (M). The temperature of the milling cutter (80a) increases slowly 24 during operation due to the point contact between the free end and the workpiece and is 1 durable. Consequently, the useful life of the improved milling cutter (80a) is prolonged.
2 However, due to the tapered body of the milling cutter (80a), a rough appearance with a 3 saw-toothed cross section is formed on the cut surface (M) of the workpiece (90) after 4 the operation of the milling cutter.
To overcome the shortcomings, the present invention tends to provide an 6 improved milling cutter to mitigate the aforementioned problems.
7 svlutMARY QF TuE 1NV .PNTIoN
8 The primary objective of the present invention is to provide a milling cutter that 9 has a head always contacting the surface of a workpiece when the milling cutter operates and a body extending from the head and tapered.
I 1. A milling cutter in accordance with the present invention comprises an axis, a 12 head and a body.
13 The head has multiple blades extending transversely out from the axis and each ) 4 blade has a cutting surface parallel to the axis.
] 5 The body is formed integrally on and extends from the head, has a top end and 16 multiple side edges and is tapered from the head to the top end.
17 Other objects, advantages and novel features of the invention will become more l8 apparent from the following detailed description when taken in conjunction with the 19 acconYpanying drawings.
BRTEF DESC$YPTIdN F THE D AW GS
21 Fig. I is a perspective view of a first embodiment of a niilling cutter in 22 accordance with the present invention;
23 Fig. 2 is a side view of the milling cutter in Fig. 1;
24 Fig. 3 is an operational side view of the milling cutter in Fig. I showing that the 1 milling cutter is cutting a workpiece;
2 Fig. 4 is a side view of a second embodiment of a milling cutter in accordance 3 with the present invention;
4 Fig. 5 is an enlarged side view of the milling cutter in Fig. 2 with an arcuate bottom face;
6 p'ig. 6 is a side view of a conventional milling cutter in accordance with the prior 7 art; and 8 Fig. 7 is a side view of another conventional milling cutter in accordance with 9 the prior art.
nF.TAYT 'D DESCRIPTION OF TH"p pRE ERR'ED _MB DI]yIRNT
1 i With reference to Figs. 1 and 2, a first embodiment of a milling cutter (10) in 12 accordance with the present invention comprises an axis (X), a head (11) and a body (12) 13 integrally formed with the head (11).
14 With further reference to Figs. 3 and 5, the head (11) has a top, a bottom and n-lultiple blades. The blades extend transversely out from the axis (X) and each blade has 16 a cutting surface (I 11) parallel to the axis (X) and a curved bottom. The curved bottonis 17 of the blades make milling cutter (10) smoothly define recesses or cutouts in a ] 8 workpiece (20). The cutting surface (111) of each blade has a height (H) in an extent 19 from 5% to 50% of a distance between the axis (X) and the cutting surface (111). When the milling cutter (10) rotates and cuts the workpiece (20), the cutting surfaces (1 l]) of 21 the blades of the head (11) always contact a cut surface of the workpiece (20). The cut 22 surface is smooth without a saw-toothed cross section due to the cutting surface (I11) 23 parallel to the axis (X).
24 The body (12) is formed integrally on and extends from a top of the head (11), I has a bottoin end formed on the top of the head (11), a top end and multiple side edges 2 and is tapered fronz the head (11) to the top end. The side edges of the body (12) 3 correspond to and are respectively formed with the cutting surface (111) of the head (11) 4 and each side edge is inclined inward relative to the cutting surface (111) of the head (11) at an angle (0). The angle is in an extent from 0 to 20 . A preferred extent of the angle is 6 from 0 to 10 . When the milling cutter (10) cuts the workpiece (20), the tapered body 7 (12) does not contact the workpiece (20). Therefore, no friction causing an increase of 8 the temperature of the milling cutter (10) is generated between the body (12) and the 9 workpiece (20). The durability of the milling cutter (10) is improved.
With reference to Fig. 4, a second embodiment of the milling cutter (10a) is 11 sinular to the first embodiment and has the body (12) being spiral.
12 Consequently, the milling cutter (10, 10a) of the present inveption is able to 13 define recesses or cutouts in a workpiece without causing a rapid rise in temperature of 14 the milling cutter (10, 10a) because the tapered body (12) never contacts the workpiece (20) during the cutting process. Furthermore, cutting surfaces (111) of the head (11) are 16 parallel to the axis (X) of the milling cutter () 0, l0a) so that the cut surface defining of 17 the workpiece (20) is smooth without a saw=toothed cross section, 18 Even though numerous ch.aracteristics and advantages of the present invention 19 have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only. Furthermore, changes may 21 be made in detail, especially in matters of shape, size, and arrangement of parts within 22 the scope of the appended claims.
7 2. Description of the Prior Art 8 Milling machines generaAy have a milling cutter used to cut a workpiece.
With 9 reference to Fig. 6, a conventional milling cutter (80) has a longitudinal body, a free end (A), a fixed end mounted to a milling machine, a cross section and a side cutting face.
11 Thc sidc cutting face has a length (h) and the cross section of the body is uniform in the 12 extent of the length (h). Therefore, wben the conventional milling cutter (80) cuts a 13 workpiece (90), the side cutting face (h) continuously engages with side faces of the 14 workpiece (90) so that the temperature of the milling cutter (80) increases rapidly during the operation. The milling cuter becomes easily damaged due to high temperature. In 16 order to overcome the shortcoming of the conventional milling cutter (80) as shown in 17 Fig. 6, an inYproved milling cutter (80a) is invented and introduced to the market, which 18 is shown in Fig. 7. The iinproved milling cutter (80a) has a body (C), a free end (8) and 19 a fixed end. However, the body (C) is tapered from the free end (B) to the fixed end, which means that the diameter of the free end is larger than that of other segment of the 21 body (C). When the milling cutter (80a) cuts a workpiece (M), the free end contacts the 22 side face of the workpiece at a point yet the tapered body (C) does not contact the side 23 face of the workpiece (M). The temperature of the milling cutter (80a) increases slowly 24 during operation due to the point contact between the free end and the workpiece and is 1 durable. Consequently, the useful life of the improved milling cutter (80a) is prolonged.
2 However, due to the tapered body of the milling cutter (80a), a rough appearance with a 3 saw-toothed cross section is formed on the cut surface (M) of the workpiece (90) after 4 the operation of the milling cutter.
To overcome the shortcomings, the present invention tends to provide an 6 improved milling cutter to mitigate the aforementioned problems.
7 svlutMARY QF TuE 1NV .PNTIoN
8 The primary objective of the present invention is to provide a milling cutter that 9 has a head always contacting the surface of a workpiece when the milling cutter operates and a body extending from the head and tapered.
I 1. A milling cutter in accordance with the present invention comprises an axis, a 12 head and a body.
13 The head has multiple blades extending transversely out from the axis and each ) 4 blade has a cutting surface parallel to the axis.
] 5 The body is formed integrally on and extends from the head, has a top end and 16 multiple side edges and is tapered from the head to the top end.
17 Other objects, advantages and novel features of the invention will become more l8 apparent from the following detailed description when taken in conjunction with the 19 acconYpanying drawings.
BRTEF DESC$YPTIdN F THE D AW GS
21 Fig. I is a perspective view of a first embodiment of a niilling cutter in 22 accordance with the present invention;
23 Fig. 2 is a side view of the milling cutter in Fig. 1;
24 Fig. 3 is an operational side view of the milling cutter in Fig. I showing that the 1 milling cutter is cutting a workpiece;
2 Fig. 4 is a side view of a second embodiment of a milling cutter in accordance 3 with the present invention;
4 Fig. 5 is an enlarged side view of the milling cutter in Fig. 2 with an arcuate bottom face;
6 p'ig. 6 is a side view of a conventional milling cutter in accordance with the prior 7 art; and 8 Fig. 7 is a side view of another conventional milling cutter in accordance with 9 the prior art.
nF.TAYT 'D DESCRIPTION OF TH"p pRE ERR'ED _MB DI]yIRNT
1 i With reference to Figs. 1 and 2, a first embodiment of a milling cutter (10) in 12 accordance with the present invention comprises an axis (X), a head (11) and a body (12) 13 integrally formed with the head (11).
14 With further reference to Figs. 3 and 5, the head (11) has a top, a bottom and n-lultiple blades. The blades extend transversely out from the axis (X) and each blade has 16 a cutting surface (I 11) parallel to the axis (X) and a curved bottom. The curved bottonis 17 of the blades make milling cutter (10) smoothly define recesses or cutouts in a ] 8 workpiece (20). The cutting surface (111) of each blade has a height (H) in an extent 19 from 5% to 50% of a distance between the axis (X) and the cutting surface (111). When the milling cutter (10) rotates and cuts the workpiece (20), the cutting surfaces (1 l]) of 21 the blades of the head (11) always contact a cut surface of the workpiece (20). The cut 22 surface is smooth without a saw-toothed cross section due to the cutting surface (I11) 23 parallel to the axis (X).
24 The body (12) is formed integrally on and extends from a top of the head (11), I has a bottoin end formed on the top of the head (11), a top end and multiple side edges 2 and is tapered fronz the head (11) to the top end. The side edges of the body (12) 3 correspond to and are respectively formed with the cutting surface (111) of the head (11) 4 and each side edge is inclined inward relative to the cutting surface (111) of the head (11) at an angle (0). The angle is in an extent from 0 to 20 . A preferred extent of the angle is 6 from 0 to 10 . When the milling cutter (10) cuts the workpiece (20), the tapered body 7 (12) does not contact the workpiece (20). Therefore, no friction causing an increase of 8 the temperature of the milling cutter (10) is generated between the body (12) and the 9 workpiece (20). The durability of the milling cutter (10) is improved.
With reference to Fig. 4, a second embodiment of the milling cutter (10a) is 11 sinular to the first embodiment and has the body (12) being spiral.
12 Consequently, the milling cutter (10, 10a) of the present inveption is able to 13 define recesses or cutouts in a workpiece without causing a rapid rise in temperature of 14 the milling cutter (10, 10a) because the tapered body (12) never contacts the workpiece (20) during the cutting process. Furthermore, cutting surfaces (111) of the head (11) are 16 parallel to the axis (X) of the milling cutter () 0, l0a) so that the cut surface defining of 17 the workpiece (20) is smooth without a saw=toothed cross section, 18 Even though numerous ch.aracteristics and advantages of the present invention 19 have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only. Furthermore, changes may 21 be made in detail, especially in matters of shape, size, and arrangement of parts within 22 the scope of the appended claims.
Claims (3)
1. A milling cutter (10) comprising:
an axis (X);
a head (11) having a top, a bottom and multiple blades extending transversely out from the axis and each blade having a cutting surface (111) parallel to the axis (X);
and a body (12) integrally formed on and extending from a top of the head (11), having a bottom end formed on the top of the head (11), a top end and multiple side edges and tapered from the head (11) to the top end.
an axis (X);
a head (11) having a top, a bottom and multiple blades extending transversely out from the axis and each blade having a cutting surface (111) parallel to the axis (X);
and a body (12) integrally formed on and extending from a top of the head (11), having a bottom end formed on the top of the head (11), a top end and multiple side edges and tapered from the head (11) to the top end.
2. The milling cutter (10) as claimed in claim 1, wherein each blade of the head has a curved bottom.
3. The milling cutter (10) as claimed in claimed 2, wherein the cutting surface (111) of each blade of the head (11) has a height in an extent from 5% to 50%
of a distance between the axis (X) and the cutting surface (111).
of a distance between the axis (X) and the cutting surface (111).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2534144 CA2534144A1 (en) | 2006-01-13 | 2006-01-13 | Milling cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2534144 CA2534144A1 (en) | 2006-01-13 | 2006-01-13 | Milling cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2534144A1 true CA2534144A1 (en) | 2007-07-13 |
Family
ID=38236302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2534144 Abandoned CA2534144A1 (en) | 2006-01-13 | 2006-01-13 | Milling cutter |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2534144A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140003873A1 (en) * | 2011-02-16 | 2014-01-02 | Hitachi Tool Engineering, Ltd. | End mill for cutting of high-hardness materials |
| US11865629B2 (en) | 2021-11-04 | 2024-01-09 | Kennametal Inc. | Rotary cutting tool with high ramp angle capability |
-
2006
- 2006-01-13 CA CA 2534144 patent/CA2534144A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140003873A1 (en) * | 2011-02-16 | 2014-01-02 | Hitachi Tool Engineering, Ltd. | End mill for cutting of high-hardness materials |
| US9421624B2 (en) * | 2011-02-16 | 2016-08-23 | Hitachi Tool Engineering, Ltd. | End mill for cutting of high-hardness materials |
| US11865629B2 (en) | 2021-11-04 | 2024-01-09 | Kennametal Inc. | Rotary cutting tool with high ramp angle capability |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |