CN110899794B - Damping face milling cutter with tooth pitch and cutting speed capable of being adaptively and instantaneously changed - Google Patents
Damping face milling cutter with tooth pitch and cutting speed capable of being adaptively and instantaneously changed Download PDFInfo
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- CN110899794B CN110899794B CN201911304616.7A CN201911304616A CN110899794B CN 110899794 B CN110899794 B CN 110899794B CN 201911304616 A CN201911304616 A CN 201911304616A CN 110899794 B CN110899794 B CN 110899794B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/003—Milling-cutters with vibration suppressing means
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Abstract
The invention discloses a vibration reduction face milling cutter with tooth pitch and cutting speed capable of being self-adaptively and instantaneously changed, which comprises a cutter body, a flange, an indexable blade, a spring and a mounting cutter handle, wherein the indexable blade comprises a plurality of blades; the outer cutter body is positioned on the outer side of the cutter body, the inner cutter body is positioned on the inner side of the cutter body, and the plurality of indexable blades are alternately connected with the inner cutter body and the outer cutter body; the flange is connected with the cutter body, and the spring is positioned between the flange and the cutter body; the mounting knife handle is connected with the knife body. The invention can restrain the self-excited vibration generation in the cutting process, and has a cutting edge with variable spacing and a cutting speed which can be modulated.
Description
Technical Field
The invention relates to the field of machining tools, in particular to a vibration reduction face milling cutter with a tooth pitch and a cutting speed capable of being adaptively and instantaneously changed.
Background
In machining, the machining is generally divided into various modes such as turning, milling, planing, grinding, boring and the like, and in modern machining modes, milling is increasingly applied, wherein face milling is an effective machining mode widely applied in modern engineering.
The inventors have considered that the generation of self-excited vibration is caused due to a large cutting strength or an insufficient rigidity of a process system, thereby greatly reducing the precision and quality of a machined surface, the life of a tool, the durability of equipment, the machining efficiency, and the like. The traditional method for inhibiting the self-excited vibration has the schemes of increasing the rigidity of a process system, changing the geometric shape of a cutter, adjusting cutting parameters and the like, and cannot be used or has poor effect under certain conditions.
Meanwhile, studies have shown that the most important mechanism for the generation of self-excited vibration is the regeneration of the waveform trace left on the cutting face by the previous cutting edge. Therefore, the two main ways to suppress the generation of self-excited vibration in cutting processing are variable-pitch cutting edges and a cutting speed that can be modulated.
Disclosure of Invention
The present invention has been made in view of the above-mentioned problems occurring in the conventional face milling cutter, and an object of the present invention is to provide a vibration-damping face milling cutter capable of suppressing the generation of self-excited vibration during cutting, having a variable pitch cutting edge and a modulatable cutting speed, and having a pitch and a cutting speed that are adaptive to instantaneous changes in pitch and cutting speed.
The invention aims to provide a vibration reduction face milling cutter with a tooth pitch and a cutting speed capable of being self-adaptive to instantaneous change.
In order to realize the purpose, the invention discloses the following technical scheme:
the invention discloses a vibration reduction face milling cutter with tooth pitch and cutting speed capable of being self-adaptively and instantaneously changed, which comprises a cutter body, a flange, an indexable blade, a spring and a mounting cutter handle, wherein the indexable blade comprises a plurality of blades; the outer cutter body is positioned on the outer side of the cutter body, the inner cutter body is positioned on the inner side of the cutter body, and the plurality of indexable blades are alternately connected with the inner cutter body and the outer cutter body; the flange is connected with the cutter body, and the spring is positioned between the flange and the cutter body; the mounting knife handle is connected with the knife body.
Further, the spring is installed between the side face of the flange and the outer cutter body.
Further, the outer cutter body is cylindrical, bosses are arranged on the inner side and the outer side of the outer cutter body, the boss on the inner side of the outer cutter body is used for being in contact with the bearing, the bearing can clamp the outer cutter body through clamping the boss on the inner side of the outer cutter body, and the boss on the outer side of the outer cutter body is used for being connected with the spring.
Furthermore, the side faces of the outer ring of the pair of bearings clamp the boss of the outer cutter body, and the pretightening force of the bearings can be adjusted.
Furthermore, the flange comprises a flange body and a bottom cover plate connected with the flange body, the flange body is provided with a top and a side, the top of the flange body is movably connected with the side of the flange body, and the flange cover plate is movably connected with the side of the flange body.
Furthermore, the side surface of the flange body, the bottom cover plate and the lug boss on the outer side of the outer cutter body are provided with holes which are adaptive to the size of the spring.
Furthermore, the indexable insert is fixed on the cutter body through a fixing bolt.
Furthermore, the top side and the bottom side of the spring are both fixed on the flange, and the middle part of the spring is fixed on the outer cutter body.
Further, the spring adopts a variable stiffness spring.
Furthermore, a gap is formed between the boss of the outer cutter body and the flange.
The operation mechanism of the present invention can be illustrated as follows:
when the milling cutter disclosed by the invention is used for milling, the cutter main shaft is rigidly connected with the inner cutter body, and the inner cutter body transmits the motion characteristic of the main shaft to the cutter fixed by the inner cutter body, so that the cutter connected with the inner cutter body keeps the same motion characteristic as the main shaft, namely the cutter connected with the inner cutter body keeps a preset motion rule; the movement of the main shaft is transmitted to the outer cutter body through the flange and the spring, due to the buffering effect of the spring, when the rotary movement is transmitted to the outer cutter body through the flange, the spring is compressed due to the resistance of a workpiece, in the whole compression process, the cutting speed of the blade fixed by the outer cutter body is reduced, and the cutting speed is recovered to a preset value until the resistance of the workpiece is equal to the elastic force of the spring or the spring reaches the compression limit.
Compared with the prior art, the invention has the following beneficial effects:
1) in the invention, the inner cutter body and the outer cutter body are connected by using the bearing, so that the speed difference is generated between the inner cutter body and the outer cutter body under a specific condition, the cutting edges of the milling cutter can form two different rotating speeds and different blade intervals, the most important mechanism of the generation of the self-excited vibration is the regeneration of waveform traces left on the cutting surface by the previous cutting edge, obviously, the milling cutter with the cutting edges with different cutting speeds and different blade intervals can effectively inhibit the self-excited vibration generation in the cutting process, and the method for modulating the cutting speed and the variable interval is simultaneously used for inhibiting the self-excited effect.
2) In the invention, in order to inhibit the self-excitation effect, the inner cutter body and the outer cutter body are connected by the flange and the spring, the cutter bodies can be fixed by the flange, meanwhile, a buffer area can be arranged between the inner cutter body and the outer cutter body by the connection of the flange and the spring, and the inner cutter body and the outer cutter body can keep the self-rotation inertia variable by relying on the accumulated force of the spring in the process of high-speed rotation so as to adapt to more models and adapt to various processing environments.
3) In the invention, power transmission has 2 paths, and firstly, the power is transmitted to the teeth in even number sequence through the inner cutter body, so that the cutting speed of the teeth in even number sequence is ensured to be the same as the preset value; the other path is transmitted to the outer cutter body through a flange and a spring, and the cutting speed of the odd-numbered sequencing teeth is slightly smaller than a preset value under the action of the spring and the resistance of a workpiece until the spring reaches an elastic limit and reaches the preset value; simultaneously, due to the action of the spring, the tooth pitch of the odd-numbered sequencing teeth and the tooth pitch of the even-numbered sequencing teeth can also be changed, and the limit position of the spring ensures that the odd-numbered teeth and the even-numbered teeth cannot collide with each other.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Figure 1 is a top view of the tool in an embodiment,
figure 2 is a vertical cross-sectional view of the inner and outer cutter bodies in an embodiment,
figure 3 is an enlarged view of a part of the spring means in an embodiment,
figure 4 is a horizontal cross-sectional view of the blade body in an embodiment,
FIG. 5 is a drawing of a flange bottom cover plate component in an embodiment.
In the figure, 1-top flange, 2-fixing bolt, 3-flange side face, 4-spring, 5-fixing bolt, 6-bottom cover plate, 7-outer cutter body, 8-indexable insert, 9-adjusting screw, 10-inner cutter body, 11-tapered roller bearing, 12-cylindrical pin I, 13-cylindrical pin II.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, are not to be construed as limiting the present invention, and furthermore, the terms "first", "second", "third", etc., are only used for descriptive purposes and are not intended to indicate or imply relative importance.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As described in the background art, in view of the disadvantages of the conventional face milling cutter, the present invention is directed to provide a vibration-damping face milling cutter in which the pitch and the cutting speed are adaptively and instantaneously changed, the self-excited vibration generation is suppressed in the cutting process, the cutting edges have a variable pitch, and the cutting speed can be modulated, and the present invention will be further described with reference to the accompanying drawings and the detailed description.
Examples
The embodiment provides a vibration reduction face milling cutter with a tooth pitch and a cutting speed capable of being adaptively and instantaneously changed, which comprises a cutter body, wherein the cutter body comprises an outer cutter body 7, an inner cutter body 10 and a bearing 11 for connecting the outer cutter body 7 and the inner cutter body 10; the outer cutter body is cylindrical, bosses are arranged on the inner side and the outer side of the outer cutter body respectively, the boss on the inner side of the outer cutter body is used for being in contact with the bearing, the bearing can clamp the outer cutter body through clamping the boss on the inner side of the outer cutter body, and the boss on the outer side of the outer cutter body is used for being connected with the spring.
The tool is characterized by further comprising a flange, wherein the flange comprises a flange body and a bottom cover plate 6 connected with the flange body, the top of the flange body is connected with the side face 3 of the flange through a fastening bolt, and the flange cover plate is connected with the side face 3 of the flange through a cylindrical pin, so that the rotating motion of the tool can be accurately transmitted; it should be noted that, in the following text, the top of the flange body is referred to as a top flange 1 in the present embodiment;
the cutting tool also comprises an indexable insert 8 which is fixed on the inner tool body 10 and the outer tool body 7 through a fixing bolt 5; specifically, the indexable insert comprises a plurality of inserts which are arranged in sequence, the end surface of the inner cutter body 10 is provided with even-numbered ordered inserts, and the end surface of the outer cutter body 7 is provided with odd-numbered ordered inserts; it is understood that the even-numbered blades and the odd-numbered blades in the present embodiment are relative to the blades in the present embodiment, since the inner blade body 10 and the outer blade body 7 in the present embodiment are coaxial rotating bodies, and a cylinder is assumed at the outer side of the outer blade body 7, the blade An mounted on the inner blade body 10 is projected to the cylinder with the central axis of the inner blade body 10 as the center to form a projection An ', and the blade Bn mounted on the outer blade body 7 is projected to the cylinder with the central axis of the inner blade body 10 as the center to form projections Bn', An 'and Bn' which can be sequentially arranged end to end, which can reflect the order of An and Bn; in this embodiment, a fixed blade is used as the blade with the rank number of 1, the blade with the rank number of 1 is installed in the outer cutter body 7, the blade with the rank tree of 2 is installed in the inner cutter body 10, …, and so on;
the spring 4 is arranged between the flange side surface 3 and a boss on the outer side of the outer cutter body 7; it should be noted that the spring in this embodiment includes a plurality of springs, and the plurality of springs are installed in the radial direction thereof along the rotation direction of the inner cutter body or the outer cutter body.
The rotary cutter is characterized by further comprising a mounting cutter handle, the mounting cutter handle is rigidly connected with the inner cutter body 10, and the rotary motion of the main shaft is transmitted to the even number of blades through the inner cutter body 10 and transmitted to the odd number of blades of the outer cutter body 7 through the top flange 1, the flange side surface 3, the bottom cover plate 6 and the spring 4.
It can be understood that, in the flange of the present embodiment, the bottom cover plate 6 and the flange side surface 3 are separated from each other in order to facilitate the installation of the spring 4, and a sufficient bolt installation space is left between the bottom cover plate 6 and the outer cutter body 7 of the cutter.
The corresponding positions of the flange side surface 3 and the bottom cover plate 6 for installing the spring 4 are designed into cambered surface open pore structures which are adaptive to the appearance of the spring 4, so that the position of the spring 4 is convenient to fix.
The boss on the outer side of the outer cutter body 7 is positioned between the side surface 3 of the flange and the bottom cover plate 6 of the flange, and a fixed gap is ensured among the three parts to avoid contact friction; meanwhile, the boss part of the outer cutter body 7 is provided with an opening corresponding to the installation position of the spring 4, and the size of the opening is just matched with the length and the diameter of the spring 4, so that the spring 4 can be accommodated in the opening.
The inner cutter body 10 is connected with the outer cutter body 7 through a pair of bearings 11, the outer ring of the bearing 11 is reversely arranged on the bearing 11 to extrude the boss part of the outer cutter body 7 together, the outer cutter body 7 moves synchronously with the outer ring under the action of friction force, and the extrusion force between the bearing 11 and the boss is adjusted through a pre-tightening bolt.
The bottom parts of the inner cutter body 10 and the outer cutter body 7 are distributed in a crossed mode, the indexable inserts 8 are respectively installed at fixed positions, therefore, the odd-numbered ordered teeth of the cutter are located on the outer cutter body 7, the even-numbered ordered teeth of the cutter are located on the inner cutter body 10, and the odd-numbered ordered teeth and the even-numbered ordered teeth of the cutter respectively follow the motion rules of the outer cutter body 7 and the inner cutter body 10.
The bearing 11 in this embodiment is a tapered roller bearing.
The working process of the embodiment is as follows:
when the vibration reduction face milling cutter is used for milling, a cutter spindle is rigidly connected with the inner cutter body 10, and the inner cutter body 10 transmits the motion characteristic of the spindle to the teeth in the even-numbered sequence, so that the teeth in the even-numbered sequence keep the same motion characteristic as the spindle, namely the teeth in the even-numbered sequence keep a preset motion rule.
In addition, the movement of the main shaft is transmitted to the outer cutter body 7 through the flange and the spring 4, due to the buffering effect of the spring 4, when the rotary movement is transmitted to the outer cutter body 7 from the flange, the spring 4 is compressed due to the resistance of the workpiece, and in the whole compression process, the cutting speed of the odd-numbered ordered teeth is reduced until the resistance of the workpiece is equal to the elastic force of the spring 4 or the spring 4 reaches the compression limit, and the cutting speed is recovered to the preset value. In the cutting process, due to the action of the spring 4, the cutting speed of the odd-numbered ordered teeth is changed, and the tooth pitch of the odd-numbered ordered teeth and the even-numbered ordered teeth is changed, so that the self-excited vibration in the face milling process is effectively reduced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A damping face milling cutter with tooth pitch and cutting speed capable of adapting to instantaneous change is characterized by comprising a cutter body, a flange, an indexable blade, a spring and a mounting cutter handle, wherein the indexable blade comprises a plurality of blades; the outer cutter body is positioned on the outer side of the cutter body, the inner cutter body is positioned on the inner side of the cutter body, the plurality of indexable blades are arranged in sequence, the end surface of the inner cutter body is provided with blades in even-numbered sequence, and the end surface of the outer cutter body is provided with blades in odd-numbered sequence; the outer cutter body is cylindrical, bosses are arranged on the inner side and the outer side of the outer cutter body, the boss on the inner side of the outer cutter body is used for being in contact with a bearing, the bearing can clamp the outer cutter body through clamping the boss on the inner side of the outer cutter body, and the boss on the outer side of the outer cutter body is used for being connected with a spring; the flange comprises a flange body and a bottom cover plate connected with the flange body, the flange body is provided with a top and a side, the top of the flange body is movably connected with the side of the flange body, and the flange cover plate is movably connected with the side of the flange body; the side surface of the flange body, the bottom cover plate and the lug boss of the outer cutter body are provided with holes which are adaptive to the size of a spring; the spring is arranged between the side surface of the flange and the outer cutter body, the top side and the bottom side of the spring are fixed on the flange, and the middle part of the spring is fixed on the outer cutter body; the mounting knife handle is connected with the knife body.
2. The vibration-damping face milling cutter with adaptively and instantaneously changeable pitch and cutting speed according to claim 1, wherein the outer race side faces of a pair of said bearings clamp the boss on the inner side of said outer cutter body, and the preload of the bearings is adjustable.
3. The vibration-damped face milling cutter with adaptively instantaneously changing pitch and cutting rate as set forth in claim 1, wherein said indexable insert is secured to the cutter body by a fixing bolt.
4. A vibration-damped face milling cutter with adaptively instantaneously changing tooth pitch and cutting speed as set forth in claim 1, wherein said spring is a variable rate spring.
5. The vibration-damped face mill with adaptively instantaneously changing tooth pitch and cutting rate as set forth in claim 1, wherein said outer cutter body has a clearance between said boss and said flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911304616.7A CN110899794B (en) | 2019-12-17 | 2019-12-17 | Damping face milling cutter with tooth pitch and cutting speed capable of being adaptively and instantaneously changed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911304616.7A CN110899794B (en) | 2019-12-17 | 2019-12-17 | Damping face milling cutter with tooth pitch and cutting speed capable of being adaptively and instantaneously changed |
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| Publication Number | Publication Date |
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| CN110899794A CN110899794A (en) | 2020-03-24 |
| CN110899794B true CN110899794B (en) | 2020-12-01 |
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| CN201911304616.7A Active CN110899794B (en) | 2019-12-17 | 2019-12-17 | Damping face milling cutter with tooth pitch and cutting speed capable of being adaptively and instantaneously changed |
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Families Citing this family (1)
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| CN117817029B (en) * | 2024-03-04 | 2024-05-10 | 常州市新西华亚工具有限公司 | Anti-vibration milling cutter disc and milling cutter assembly thereof |
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| GB589928A (en) * | 1944-10-18 | 1947-07-03 | Defiance Machine Works Inc | Improvements in or relating to rotary cutters |
| SU476107A1 (en) * | 1973-07-04 | 1975-07-05 | Предприятие П/Я В-2330 | Multi-blade tool |
| SU1094680A1 (en) * | 1983-04-22 | 1984-05-30 | Предприятие П/Я А-7340 | Milling cutter arbor |
| DE19825373A1 (en) * | 1998-06-06 | 1999-12-09 | Manfred Weck | Clamping a tool in a tool holder |
| CN100571945C (en) * | 2008-04-30 | 2009-12-23 | 中北大学 | A kind of self-rolling type end mill(ing) cutter with wiper inserts |
| CN201192736Y (en) * | 2008-05-23 | 2009-02-11 | 张晓艳 | Level loading and self rolling facing mill |
| CN103111676B (en) * | 2013-02-18 | 2014-02-19 | 山东大学 | High-speed face milling cutter for reducing resistance and noises by utilizing micro grooves in surface |
| WO2015001789A1 (en) * | 2013-07-01 | 2015-01-08 | 国立大学法人名古屋大学 | End mill machining device, cam apparatus and nc program |
| RU2559078C1 (en) * | 2014-05-13 | 2015-08-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Алтайский государственный технический университет им. И.И. Ползунова" (АлтГТУ) | Assembled face cutter |
| CN104191005B (en) * | 2014-07-31 | 2016-06-22 | 湖南大学 | A kind of milling attachment suitable in high-speed plane finish-milling |
| US10124424B2 (en) * | 2016-01-12 | 2018-11-13 | Kennametal Inc. | Rotary cutting tool with internal balancing feature |
| CN107538058B (en) * | 2017-09-07 | 2019-03-29 | 中南大学 | Impact resistance dynamic balancing milling cutter suitable for high-speed cutting turbine disc mortise |
| CN108515221A (en) * | 2018-05-17 | 2018-09-11 | 江苏永伟精密工具有限公司 | It is a kind of that there is the high intensity milling cutter for accelerating cutting speed function |
| CN208467366U (en) * | 2018-06-27 | 2019-02-05 | 惠州市明锐精密工具有限公司 | A kind of metal cutting milling cutter |
| CN109352056B (en) * | 2018-12-07 | 2020-01-10 | 西安交通大学 | Face milling cutter with self-cooling lubricating structure |
| CN109954915B (en) * | 2019-05-08 | 2024-02-09 | 常州苏德工具有限公司 | Milling cutter disc convenient for adjusting blade mounting position and using method thereof |
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