CN109332774B - Radially adjustable three-edge milling cutter - Google Patents
Radially adjustable three-edge milling cutter Download PDFInfo
- Publication number
- CN109332774B CN109332774B CN201811473152.8A CN201811473152A CN109332774B CN 109332774 B CN109332774 B CN 109332774B CN 201811473152 A CN201811473152 A CN 201811473152A CN 109332774 B CN109332774 B CN 109332774B
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- cutter
- holder
- blade
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- chip
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
- B23C5/22—Securing arrangements for bits or teeth or cutting inserts
- B23C5/24—Securing arrangements for bits or teeth or cutting inserts adjustable
- B23C5/2472—Securing arrangements for bits or teeth or cutting inserts adjustable the adjusting means being screws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
- B23C5/22—Securing arrangements for bits or teeth or cutting inserts
- B23C5/2204—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert
- B23C5/2234—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts fitted on a ring or ring segment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
- B23C5/22—Securing arrangements for bits or teeth or cutting inserts
- B23C5/24—Securing arrangements for bits or teeth or cutting inserts adjustable
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Cutting Devices (AREA)
- Milling Processes (AREA)
Abstract
The invention discloses a radially adjustable three-edge milling cutter which comprises a cutter head and a plurality of blades, wherein the cutter head is provided with a plurality of chip grooves along the circumferential direction, the number of the chip grooves is the same as that of the blades, the blades are fixed in the chip grooves through a mounting assembly, the mounting assembly comprises a cutter holder and a cutter holder fastening piece, the cutter holder can be fixed in the chip grooves in a radially movable mode through the cutter holder fastening piece, cutter grooves are formed in the cutter holder, the blades are fixed in the cutter grooves through the blade fastening piece, a radial adjusting bolt is arranged between the cutter holder and the chip grooves and comprises a conical surface section and a threaded section, a screw hole matched with the threaded section is formed in the chip groove, and the cutter holder is provided with an adjusting inclined surface matched with the conical surface section. The invention can realize the high-precision (micron-scale) adjustment of the blade.
Description
Technical Field
The invention relates to a metal cutting tool, in particular to a three-edge milling cutter with adjustable radial direction.
Background
Three-edge milling cutters are commonly used for milling step faces and grooves and are widely applied to the field of machining. However, due to errors in the manufacturing and mounting accuracy of the blades and accessories, the radial and axial dimensions thereof are difficult to achieve with high accuracy. The axial dimension precision is low, the width dimension of the machined groove is changed and is generally large; the radial dimension accuracy is low, which means that the tool tips are not consistent in height, large runout exists among the blades, the quality of the processed bottom surface of the groove is reduced, and the service life of the blades is shortened. In the face of this difficulty, people have developed various face milling cutters with adjustable axial dimensions, so that the groove widths of various specifications can be flexibly and conveniently processed. Regarding the aspect of radial dimension adjustment, the related patents are less. Chinese patent document 206763970U discloses a three-edge milling cutter, which comprises a milling cutter disc, a milling cutter blade, and a fixing screw. The milling cutter is characterized in that the milling cutter disc is provided with a plurality of chip grooves, the chip grooves are provided with fixing surfaces, the fixing surfaces are provided with T-shaped grooves, the milling cutter disc is provided with T-shaped convex blocks, and the T-shaped convex blocks can move in the T-shaped grooves, so that the radial size can be adjusted. Although the invention can adjust the radial dimension, it has a serious problem that the adjustment accuracy is not high. Because the radial dimension adjustment is formed by the linear movement of the milling cutter blade, micron-scale adjustment is difficult to achieve, and the blade is likely to slightly move in the process of locking the blade after the dimension adjustment, so that the radial dimension is changed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a radially adjustable three-edge milling cutter capable of realizing high-precision (micron-sized) adjustment.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a radial adjustable three-sided sword milling cutter, includes blade disc and a plurality of blade, the blade disc is equipped with a plurality of chip pockets along circumference, chip pocket quantity is the same with blade quantity, the blade passes through the installation component to be fixed in the chip pocket, the installation component includes cutter holder and cutter holder fastener, but the cutter holder passes through the fixing of cutter holder fastener radial movement in the chip pocket, be equipped with the sword groove on the cutter holder, the blade passes through the blade fastener to be fixed in the sword groove, be equipped with radial adjusting bolt between cutter holder and the chip pocket, radial adjusting bolt includes conical surface section and screw thread section, be equipped with in the chip pocket with screw thread section complex screw, the cutter holder be equipped with can with conical surface section complex regulation inclined plane.
As a further improvement of the above technical solution, preferably, the radial adjusting bolt further includes a rotating section, and a circumferential surface of the rotating section is provided with at least one operation hole.
As a further improvement of the above technical solution, it is preferable that the operation holes are provided in at least three numbers and arranged uniformly in the circumferential direction.
As a further improvement of the above technical means, it is preferable that the surfaces of the holder that contact the chip flutes are provided with guide serrations, and the guide serrations are provided radially in the thickness direction.
As a further improvement of the above technical solution, preferably, the holder fastening member is a fastening bolt, the holder is provided with a kidney-shaped hole, and the fastening bolt passes through the kidney-shaped hole and is fixed to the cutter head.
As a further improvement of the above technical solution, preferably, the tool holder is provided with distance scales, and the cutter head is correspondingly provided with distance scales.
As a further improvement of the above technical solution, preferably, the mounting assembly further includes a press block for pressing the tool holder, and the press block is fixed in the chip pocket by a press block fastener.
As a further improvement of the above technical solution, preferably, the press block fastening member is a stud bolt.
As a further improvement of the above technical means, preferably, an axial direction of the stud bolt is perpendicular to an axial direction of the fastening bolt.
As a further improvement of the above technical means, preferably, the blade fastening member is a fastening screw.
Compared with the prior art, the invention has the advantages that:
(1) according to the radially adjustable three-edge milling cutter, the cutter holder is not directly moved through adjustment of the radial size, the adjusting conical surface section and the adjusting inclined surface are extruded through the rotating motion of the adjusting conical surface section, the extrusion on the adjusting inclined surface is converted into the linear motion of the cutter holder, the common specification of external threads of the threaded section is M3 x 0.6, the taper of the conical surface section is 1:10, the radial moving amount of the cutter holder is 1.67 mu M when the radial adjusting bolt rotates for 10 degrees, and therefore high-precision (micron-sized) adjustment can be achieved.
(2) According to the radially adjustable three-edge milling cutter, the operation holes are formed in the circumferential direction of the radial adjusting bolt, and the three operation holes are uniformly distributed, so that an operation space is provided, and the adjusting rod can be ensured to be inserted into at least one operation hole without interference. Therefore, the device has the characteristics of opening an operation space and not considering interference.
(3) According to the radially adjustable three-edge milling cutter, the contact surfaces of the cutter holder and the chip groove are respectively provided with the guide sawteeth, the thickness direction of the guide sawteeth is arranged along the radial direction, the guide sawteeth on the contact surfaces are parallel to the radial direction and can be meshed with each other, the cutter holder is ensured to move linearly along the radial direction of the cutter head, and the adjustment precision of the radial size is ensured.
Drawings
Fig. 1 is a schematic perspective exploded view of the present invention.
Fig. 2 is a schematic perspective view of the present invention.
FIG. 3 is a schematic view of the radial adjusting bolt of the present invention in cooperation with a toolholder.
Fig. 4 is a schematic view of the position of the guide serrations between the tool holder and the tool head in accordance with the present invention.
Fig. 5 is a schematic view of the structure of the radial adjusting bolt of the present invention.
Fig. 6 is a schematic view showing the arrangement of the operation holes in the radial direction adjustment bolt of the present invention.
The reference numerals in the figures denote:
1. a cutter head; 2. a blade; 21. a blade fastener; 3. a chip pocket; 31. a screw hole; 4. a tool holder; 41. a cutter groove; 42. adjusting the inclined plane; 43. a kidney-shaped hole; 5. a toolholder fastener; 6. a guide saw tooth; 7. a radial adjustment bolt; 71. a conical surface section; 72. a threaded segment; 73. a rotating section; 74. an operation hole; 75. adjusting a rod; 8. distance scales; 9. briquetting; 91. and (4) pressing block fasteners.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples of the specification.
As shown in fig. 1 to 6, the radially adjustable three-sided blade milling cutter of the present embodiment includes a cutter head 1 and a plurality of blades 2, the cutter head 1 is provided with a plurality of chip flutes 3 along the circumferential direction, the number of the chip flutes 3 is the same as that of the blades 2, the blades 2 are fixed in the chip flutes 3 through a mounting assembly, the mounting assembly includes a cutter holder 4 and a cutter holder fastening member 5, the cutter holder 4 is fixed in the chip flutes 3 through the cutter holder fastening member 5 in a radially movable manner, the cutter holder 4 is provided with a cutter flute 41, the blades 2 are fixed in the cutter flute 41 through the blade fastening member 21, a gap is reserved between the cutter holder 4 and the chip flutes 3, a radial adjusting bolt 7 is provided in the gap, the radial adjusting bolt 7 includes a conical surface section 71 and a threaded section 72, a screw hole 31 matched with the threaded section 72 is provided in the chip flute 3, and the cutter holder 4 is provided with an adjusting inclined surface 42 matched with the conical surface section 71. Specifically, the insert fastener 21 is a fastening screw. Rotating the radial adjustment screw 7, the tapered section 71 engages the adjustment ramp 42 and presses the adjustment ramp 42, thereby moving the holder 4 in the radial direction by a certain distance, and thus moving the insert 2 on the holder 4 to the proper position.
According to the radial adjustable three-edge milling cutter, the cutter holder 4 is not directly moved through the adjustment of the radial size, the adjustment conical surface section 71 is extruded between the adjustment conical surface section 71 and the adjustment inclined surface 42, the extrusion on the adjustment inclined surface 42 is converted into the linear motion of the cutter holder 4, the common specification M3 x 0.6 of the external thread of the thread section 72 is taken as the common specification, and the taper 1:10 of the conical surface section 71 is taken as an example, the radial movement amount of the cutter holder 4 is 1.67 mu M when the radial adjusting bolt 7 rotates by 10 degrees, so that the high-precision (micron-scale) adjustment can be realized.
In this embodiment, the radial adjusting bolt 7 further includes a rotating section 73, and the circumference of the rotating section 73 is provided with at least one operation hole 74. In the present embodiment, three operation holes 74 are used as an example, and are uniformly arranged in the circumferential direction. The central angle between the operation holes 74 is 120 °. When rotating, one adjustment lever 75 is disposed, and the adjustment lever 75 is inserted into the operation hole 74 to rotate the radial direction adjustment bolt 7. In the conventional adjustment, a wrench is generally inserted into the end face of the bolt from the axial direction to rotate the bolt, and due to the special structure of the three edges, interference exists, so that rotation needs to be performed from the radial direction of the radial adjusting bolt 7, in the embodiment, the operation holes 74 are arranged in the circumferential direction of the radial adjusting bolt 7, and three uniform distribution of the operation holes 74 is designed, so that not only is an operation space provided, but also it can be ensured that the adjusting rod 75 can be inserted from at least one operation hole 74 without interference. Therefore, the device has the characteristics of opening an operation space and not considering interference.
In this embodiment, the surfaces of the holder 4 in contact with the chip flutes 3 are provided with guide serrations 6, and the guide serrations 6 are arranged radially in the thickness direction. The guiding serrations 6 are used for guiding the holder 4 when it is moved radially. The guide sawteeth 6 on each contact surface are parallel to the radial direction and can be meshed with each other, so that the tool holder 4 is ensured to move linearly along the radial direction of the cutter head 1, and the adjustment precision of the radial dimension is ensured. In addition to this embodiment, it is also possible to provide the bottom surface of the holder 4 with a recess and to provide the surface of the chip pocket 3 that is in contact with the bottom surface of the holder 4 with a protruding strip.
In this embodiment, the holder fastening member 5 is a fastening bolt, the holder 4 is provided with a kidney-shaped hole 43, and the fastening bolt passes through the kidney-shaped hole 43 and is fixed with the cutter head 1.
In this embodiment, be equipped with distance scale 8 on the cutter holder 4, the correspondence is equipped with distance scale 8 on the blade disc 1, sets up the scale mark, can read out cutter holder 4 displacement fast, practices thrift adjustment time.
In this embodiment, the mounting assembly further comprises a pressing block 9 for pressing the tool holder 4, and the pressing block 9 is fixed in the chip pocket 3 by a pressing block fastener 91. The pressing block 9 is used for pressing the cutter holder 4, so that the cutter holder 4 is firmly and reliably installed. Specifically, the press block fastener 91 is a stud bolt, and the contact part of the stud bolt, the cutter head 1 and the press block 9 is provided with threads, so that the locking force is better, the press block can be well fastened, and the tool holder 4 is firmly pressed. The axial direction of the stud bolt is perpendicular to the axial direction of the fastening bolt for fixing the holder 4. The aim is also to make the holder 4 firmly pressed. In addition to the present embodiment, the press block fastener 91 may be provided as a common bolt.
The adjusting principle is as follows:
before the radial dimension of the blade 2 is adjusted, the stud bolt (the pressing block fastener 91) and the fastening bolt (the tool holder fastener 5) are firstly loosened to ensure that the tool holder 4 can freely move along the guide sawteeth 6, then the adjusting rod 75 is inserted into any one of the operation holes 74, and the radial adjusting bolt 7 is rotated, so that the conical surface section 71 is conical, has taper, and can push the adjusting inclined surface 42 on the tool holder 4 to drive the tool holder 4 to move along the radial direction, and the function of accurately adjusting the radial dimension of three edges is realized.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (8)
1. The utility model provides a radial adjustable three-edge milling cutter, includes blade disc (1) and a plurality of blade (2), blade disc (1) is equipped with a plurality of chip pockets (3) along circumference, chip pocket (3) quantity is the same with blade (2) quantity, blade (2) are fixed through the installation component in chip pocket (3), the installation component includes cutter holder (4) and cutter holder fastener (5), but cutter holder (4) are fixed in chip pocket (3) through cutter holder fastener (5) radial movement, be equipped with sword groove (41) on cutter holder (4), blade (2) are fixed in sword groove (41) through blade fastener (21), its characterized in that: the tool holder is characterized in that a radial adjusting bolt (7) is arranged between the tool holder (4) and the chip groove (3), the radial adjusting bolt (7) comprises a conical surface section (71) and a threaded section (72), a threaded hole (31) matched with the threaded section (72) is formed in the chip groove (3), the tool holder (4) is provided with an adjusting inclined surface (42) matched with the conical surface section (71), the mounting assembly further comprises a pressing block (9) used for pressing the tool holder (4), the pressing block (9) is fixed in the chip groove (3) through a pressing block fastening piece (91), the radial adjusting bolt (7) is positioned below the pressing block (9), the pressing block (9) is positioned on one side of the tool holder fastening piece (5), the radial adjusting bolt (7) further comprises a rotating section (73), at least one operating hole (74) is formed in the peripheral surface of the rotating section (73), and the conical surface section (71) is arranged at the upper end between the rotating section (73) and the threaded section of the radial adjusting bolt (7), the diameter of the conical surface section (71) is gradually increased from the rotating section (73) to the threaded section.
2. The radially adjustable three-sided milling cutter according to claim 1, wherein: the operation holes (74) are provided in at least three numbers and are uniformly arranged along the circumferential direction.
3. The radially adjustable face mill according to claim 1 or 2, characterized in that: and guide sawteeth (6) are arranged on the contact surfaces of the tool holder (4) and the chip groove (3), and the thickness direction of the guide sawteeth (6) is arranged along the radial direction.
4. The radially adjustable face mill according to claim 1 or 2, characterized in that: the tool holder fastening piece (5) is a fastening bolt, a waist-shaped hole (43) is formed in the tool holder (4), and the fastening bolt penetrates through the waist-shaped hole (43) to be fixed with the cutter head (1).
5. The radially adjustable face mill according to claim 1 or 2, characterized in that: the cutter holder (4) is provided with distance scales (8), and the cutter head (1) is correspondingly provided with the distance scales (8).
6. The radially adjustable three-sided milling cutter according to claim 4, wherein: the pressing block fastener (91) is a stud bolt.
7. The radially adjustable three-sided milling cutter according to claim 6, wherein: the axial direction of the stud bolt is perpendicular to the axial direction of the fastening bolt.
8. The radially adjustable face mill according to claim 1 or 2, characterized in that: the blade fastener (21) is a fastening screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811473152.8A CN109332774B (en) | 2018-12-04 | 2018-12-04 | Radially adjustable three-edge milling cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811473152.8A CN109332774B (en) | 2018-12-04 | 2018-12-04 | Radially adjustable three-edge milling cutter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109332774A CN109332774A (en) | 2019-02-15 |
| CN109332774B true CN109332774B (en) | 2021-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811473152.8A Active CN109332774B (en) | 2018-12-04 | 2018-12-04 | Radially adjustable three-edge milling cutter |
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| CN (1) | CN109332774B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH716990A1 (en) * | 2019-12-20 | 2021-06-30 | Urma AG Werkzeugfabrik | Machine reaming tool, cutting insert and base body for receiving cutting inserts. |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1597207A (en) * | 2004-08-19 | 2005-03-23 | 株洲硬质合金集团有限公司 | Face and side cutter |
| CN1806980A (en) * | 2006-01-23 | 2006-07-26 | 株洲钻石切削刀具股份有限公司 | Rough and refined machining composite milling cutter |
| US20070140799A1 (en) * | 2003-12-17 | 2007-06-21 | Ngk Spark Plug Co., Ltd. | Cutting tip holder and cutting tool |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3835052B2 (en) * | 1999-04-06 | 2006-10-18 | 三菱マテリアル株式会社 | Turning tool |
| JP2005177898A (en) * | 2003-12-17 | 2005-07-07 | Ngk Spark Plug Co Ltd | Cutting tool body and cutting tool |
| CN103894661B (en) * | 2012-12-28 | 2020-04-28 | 株洲钻石切削刀具股份有限公司 | Grooving cutter with adjustable cutting width |
| JP6627174B2 (en) * | 2013-04-24 | 2020-01-08 | 三菱マテリアル株式会社 | Cutting edge position adjustment mechanism and cutting edge replaceable cutting tool |
-
2018
- 2018-12-04 CN CN201811473152.8A patent/CN109332774B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070140799A1 (en) * | 2003-12-17 | 2007-06-21 | Ngk Spark Plug Co., Ltd. | Cutting tip holder and cutting tool |
| CN1597207A (en) * | 2004-08-19 | 2005-03-23 | 株洲硬质合金集团有限公司 | Face and side cutter |
| CN1806980A (en) * | 2006-01-23 | 2006-07-26 | 株洲钻石切削刀具股份有限公司 | Rough and refined machining composite milling cutter |
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| Publication number | Publication date |
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| CN109332774A (en) | 2019-02-15 |
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