CN203459733U - Precise milling cutter - Google Patents
Precise milling cutter Download PDFInfo
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- CN203459733U CN203459733U CN201320538080.7U CN201320538080U CN203459733U CN 203459733 U CN203459733 U CN 203459733U CN 201320538080 U CN201320538080 U CN 201320538080U CN 203459733 U CN203459733 U CN 203459733U
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- milling cutter
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Abstract
The utility model discloses a precise milling cutter. The precise milling cutter comprises a cutter body, and a plurality of cutter teeth on the periphery of the cutter body, wherein a flat segment is formed between every two adjacent cutter teeth, so that a flat bottom surface is formed on the bottom of a spiral groove between every two adjacent cutter teeth; the flat bottom surfaces and the spiral grooves are formed in the cutter body at the same spiral angle; all points on each flat bottom surface have the same distance to the axis of the milling cutter. Owing to the flat segments, the interval between the every two adjacent cutter teeth is increased, the chip discharge space of the milling cutter is increased, and consequently cut chips are smoothly discharged. Besides, since the interval between the every two adjacent cutter teeth is increased due to the flat segments, the rake angle of each cutter edge can be enlarged, and consequently the cutter edges are sharp; the clearance angle of each cuter edge can be adjusted to be small correspondingly, so that the thickness of each cutter tooth is ensured and the cutter tooth are prevented from being broken. In addition, as the bottom of each spiral groove becomes flat due to the flat segments, the core diameter of the milling cutter can be enlarged, the strength of the milling cutter can be enhanced, and consequently the breaking rate of the milling cutter can be lowered.
Description
Technical field
The utility model relates to process tool field, in particular, relates to a kind of accurate milling cutter.
Background technology
Accurate milling cutter is generally used for the Precision Machining manufacture of various parts, and its machining accuracy is generally higher.Take processing PCB as example, and PCB milling cutter is the cutting tool in milling profile (moulding) process.
As shown in Figures 1 and 2, the multiple-cutting-edge chip breaking grooved milling cutter of producing both at home and abroad at present and using of take is example, this multiple-cutting-edge chip breaking grooved milling cutter comprises: cutter hub 100 and the cutter tooth 110 that is arranged on cutter hub periphery, space between cutter tooth 110 is helicla flute 180, wherein cutter tooth 110 comprises blade 111, rake face 112 and rear knife face 114, and the rake face 112 between two adjacent cutters tooth 110 and rear knife face 114 have formed respectively the wall of helicla flute 180.
The shape of the helicla flute 180 of milling cutter is all by the shape that adds emery wheel in man-hour, to be determined completely, and be illustrated in figure 3 the lateral plan for the emery wheel 10 of the milling cutter shown in Fig. 1 and Fig. 2, as can be seen from Figure, the edge of emery wheel 10 is pointed shape.After determining the quantity of cutter tooth 110 or blade 111, as shown in Figure 1-2, for guaranteeing the sharp of cutter, in the definite situation of anterior angle 112 angle γ, but its relief angle of such words α, chip removal space (and helicla flute 180) and core diameter
all be limited, cannot freely adjust.Therefore, this milling cutter chip removal space is less, and cutting edge is sharp not, and core diameter, owing to being subject to the limit design of emery wheel 10 less, makes milling cutter that breaking easily occur in milling process, causes the milling cutter life-span shorter, thereby increases processing cost and reduce working (machining) efficiency.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of chip removal smoothness, the more excellent accurate milling cutter of processing characteristics.
The purpose of this utility model is achieved through the following technical solutions: a kind of accurate milling cutter, comprising: cutter hub and a plurality of cutters tooth that are arranged on cutter hub periphery; Between described cutter tooth, being provided with one smooth section makes the helicla flute bottom between described cutter tooth form a flat bottom surface, described flat bottom surface arranges by identical helical angle with described helicla flute on described cutter hub, and in described flat bottom surface, each point equates to the distance in described milling cutter axle center.
Preferably, the blade of described cutter tooth of take is the first point, take blade one end far away described in described smooth segment distance is second point, and described first is 15 °～35 ° to the leap radian θ between described second point, described leap radian θ be centered by described milling cutter axle center towards angle.Towards the size of angle θ, directly determined the length of smooth section, also determined the spacing distance between cutter tooth, and then determined spiral fluted size between cutter tooth, when θ is within the scope of 15 °～35 °, spiral fluted size can reach preferably chip removal performance.
Preferably, described leap radian θ is 20 °～25 °.Wherein, when θ angle is during at 20 °～25 °, spiral fluted chip removal best performance.
Preferably, the blade anterior angle angle of described cutter tooth is 0 °～10 °.The size of blade anterior angle has determined the sharpness of milling cutter, and too little milling process is difficulty comparatively, easy broken teeth too greatly, and the utility model is selected 0 °～10 °, within the scope of this, has kept the sharp and intensity of milling cutter.
Preferably, the blade anterior angle angle of described cutter tooth is 4 °～9 °.When the cutter tooth blade anterior angle angle of milling cutter is 4 °～9 °, its milling effect is best, and keen edge degree is better.
Preferably, described milling cutter diameter is 0.4mm～2.5mm.
Preferably, described milling cutter surface is coated with abrasion resistant coatings.Abrasion resistant coatings can improve the anti-wear performance of milling cutter, and then increases the life-span of milling cutter.
Preferably, described abrasion resistant coatings is diamond coatings.Diamond coatings has good anti-wear performance.
Preferably, described milling cutter is chip breaking type milling cutter.
A processing method for accurate milling cutter as claimed in claim 1, comprises step:
S1, grinds evener at the edge of emery wheel;
S2 carries out the cutter tooth that grinding forms milling cutter on bar.
The utility model is owing to arranging one smooth section between the cutter tooth of milling cutter, a flat bottom surface has been formed on the helicla flute bottom at cutter hub, this flat bottom surface is extended by identical helical angle along helicla flute on cutter hub, due to this setting of smooth section, has increased the spacing distance between cutter tooth, like this, compare with other milling cutter, it can reduce cutter tooth and spiral fluted quantity accordingly, and the helicla flute space of milling cutter is increased, and then increased the chip removal space of milling cutter, make chip discharge more smooth.And due to the setting of smooth section, the interval between cutter tooth increases, and blade anterior angle can be arranged and make more greatly blade sharper, and circumferential clearance can be turned down accordingly, has guaranteed the thickness of cutter tooth, avoids occurring broken teeth phenomenon.Moreover, due to the setting of smooth section, helicla flute bottom is flattened, can increase like this core diameter of milling cutter, improve milling cutter intensity, and then can reduce breaking rate.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing chip breaking type milling cutter,
Fig. 2 is also the structural representation of existing chip breaking type milling cutter,
Fig. 3 is the abrasive grinding wheel texture edge schematic diagram of existing chip breaking type milling cutter,
Fig. 4 is the chip breaking type milling cutter construction schematic diagram of the utility model embodiment,
Fig. 5 is the partial structurtes schematic diagram of the chip breaking type milling cutter of the utility model embodiment,
Fig. 6 is also the chip breaking type milling cutter construction schematic diagram of the utility model embodiment,
Fig. 7 is the abrasive grinding wheel structural representation of the utility model embodiment chip breaking type milling cutter.
Wherein: 10, emery wheel, 12, evener;
100, cutter hub, 110, cutter tooth, 111, blade, 112, rake face, 114, rear knife face, 116, excessive cambered surface, 117, flat bottom surface, 180, helicla flute.
The specific embodiment
Below in conjunction with accompanying drawing and preferred embodiment, the utility model is described in further detail.
As Figure 4-Figure 6, the utility model describes with the accurate milling cutter of multiple-cutting-edge chip breaking grooved, and this milling cutter comprises: cutter hub 100 and a plurality of cutters tooth 110 that are arranged on cutter hub 100 peripheries; Wherein cutter tooth 110 comprises blade 111, rake face 112 and rear knife face 114; Between described cutter tooth 110, be provided with one smooth section, on cutter hub 100, form a flat bottom surface 117, rake face 112 between two adjacent cutters tooth 110 has formed respectively the wall of helicla flute 180 with, knife face 114 and described flat bottom surface 117, this flat bottom surface 117 makes helicla flute 180 bottoms between described cutter tooth 110 form a comparatively smooth bottom surface, described flat bottom surface 117 is pressed identical helical angle with described helicla flute 180 and is arranged on described cutter hub 100, and in this flat bottom surface 117, each point equates to the distance in described milling cutter axle center.Owing to arranging one smooth section between the cutter tooth 110 at milling cutter, a flat bottom surface 117 has been formed on helicla flute 180 bottoms at cutter hub 100, this flat bottom surface 117 is extended by identical helical angle along helicla flute 180 on cutter hub 100, due to this setting of smooth section, increased the spacing distance between cutter tooth 110.Like this, compare with other milling cutter, it can reduce cutter tooth and spiral fluted quantity accordingly, in the present embodiment, cutter tooth or spiral fluted quantity can reduce 1～2, and helicla flute 180 spaces of milling cutter are increased, and then increased the chip removal space of milling cutter, make chip discharge more smooth; And the efficiency of milling cutter processing also can improve 15%～30%.And due to the setting of smooth section, the interval between cutter tooth 110 increases, blade 111 anterior angle γ can be arranged makes more greatly blade 111 sharper, and blade 111 relief angle α can turn down accordingly, guaranteed the thickness of cutter tooth 110, avoid occurring broken teeth phenomenon.Moreover, due to the setting of smooth section, helicla flute 180 bottoms are flattened, can increase the core diameter of milling cutter like this, maximum can be promoted to 110% of common chip-breaker, improves milling cutter intensity, and then can reduce breaking rate, the life-span of comparable common chip breaking milling cutter of its life-span is high 1.5 times.
As shown in Figure 5, the joining place in flat bottom surface 117 with rake face 112, is provided with excessive cambered surface 116, avoids like this cutter tooth that fracture by fatigue easily occurs, and causes broken teeth.
In the present embodiment, as shown in Figure 6, the blade 111 of described cutter tooth 110 of take is the first point, take blade one end far away described in described smooth segment distance is second point (being an edge of flat bottom surface 117), described first is 20 °～30 ° to the leap radian θ between described second point, described leap radian θ be centered by described milling cutter axle center towards angle.Towards the size of angle θ, directly determined the length (being the width of flat bottom surface 117) of smooth section, also determined the spacing distance between cutter tooth 110, and then determined that between cutter tooth, spiral fluted is big or small, when θ is within the scope of 15 °～30 °, spiral fluted chip removal space has increased by 25%～40%, can reach preferably chip removal performance, and slightly large for milling cutter diameter, the scope of θ can increase to 15 °～35 °.
The blade 111 anterior angle angles of milling cutter can be set to 0 °～10 ° in the present embodiment, to guarantee the sharpness of blade.The size of blade 111 anterior angles has determined the sharpness of milling cutter, too little sharpness causes comparatively difficulty of milling process not, too greatly makes the thinner easy broken teeth of cutter tooth 110, and the utility model is selected 0 °～10 °, within the scope of this, kept the intensity of the sharp and cutter tooth 110 of milling cutter.Yet for the present embodiment, because helicla flute 180 becomes wider larger, the variation that the relief angle α of blade 111 can corresponding anterior angle γ and adjusting, has guaranteed the thickness of cutter tooth 110, and has not been subject to the restriction of abrasive grinding wheel.
Wherein, when the blade 111 anterior angle angle γ of described cutter tooth 110 are 4 °～9 °, its milling effect is more excellent, and keen edge degree is better.
In following table, the present embodiment provides when blade 111 anterior angle γ are 4 °, and the experimental data of four kinds of milling cutters when θ angle is 15 °, 24 °, 26 ° and 30 ° specifically sees the following form:
| θ angle | 15° | 20° | 25° | 30° |
| Stock-removing efficiency | 105% | 107% | 110% | 114% |
| Chip removal efficiency | 115% | 123% | 128% | 132% |
| Life-span | 120% | 125% | 135% | 120% |
Table 1
In following table, the present embodiment provides again when blade 111 anterior angle γ are 9 °, and the experimental data of four kinds of milling cutters when θ angle is 20 °, 24 °, 26 ° and 30 ° specifically sees the following form:
| θ angle | 15° | 20° | 25° | 30° |
| Stock-removing efficiency | 115% | 125% | 130% | 134% |
| Chip removal efficiency | 115% | 123% | 128% | 132% |
| Life-span | 130% | 140% | 150% | 135% |
Table 2
As seen from the above table, anterior angle γ is larger, and the stock-removing efficiency of cutter is higher, and θ angle is larger, and chip removal efficiency is better, and when θ angle is during at 25 °, while being 4 ° and 9 ° at γ angle, cutter life has reached respectively 135% and 150%, has good effect; And when θ angle is during at 30 °, cutter life starts to reduce, therefore, θ angle can not keep increasing always, otherwise can affect the life-span of cutter.
For the selection at γ angle, in actual applications, also need to consider the wearing and tearing of emery wheel, through test and experiment, the angle of anterior angle 6～7 ° time, reaches best effect again.
The milling cutter of the present embodiment is that diameter is at the accurate milling cutter of chip breaking type of 0.4mm～2.5mm, the surface of milling cutter is coated with abrasion resistant coatings to improve the anti-wear performance of milling cutter, and then the life-span of increase milling cutter, concrete, can select diamond coatings, diamond coatings has good anti-wear performance, certainly, also can select the abrasion resistant coatings of other types, specifically can determine according to processing situation.
The present embodiment provides the processing method of the accurate milling cutter of this chip breaking type simultaneously, comprises step:
S1, as shown in Figure 7, grinds evener 12 at the edge of emery wheel 10;
S2 carries out the cutter tooth that grinding forms milling cutter on bar, and this step is identical with the processing mode of existing milling cutter.
From Fig. 3 and Fig. 7, can find out, in order to obtain the flat bottom surface 117 on milling cutter body 100, there is change in the structure of emery wheel 10.
Above content is in conjunction with concrete preferred embodiment further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (9)
1. an accurate milling cutter, comprising: cutter hub and a plurality of cutters tooth that are arranged on cutter hub periphery; It is characterized in that, between described cutter tooth, being provided with one smooth section makes the helicla flute bottom between described cutter tooth form a flat bottom surface, described flat bottom surface arranges by identical helical angle with described helicla flute on described cutter hub, and in described flat bottom surface, each point equates to the distance in described milling cutter axle center.
2. accurate milling cutter as claimed in claim 1, it is characterized in that, the blade of described cutter tooth of take is the first point, take blade one end far away described in described smooth segment distance is second point, described first is 15 °～35 ° to the leap radian θ between described second point, described leap radian θ be centered by described milling cutter axle center towards angle.
3. accurate milling cutter as claimed in claim 2, is characterized in that, described leap radian θ is 20 °～25 °.
4. accurate milling cutter as claimed in claim 1, is characterized in that, the blade anterior angle angle of described cutter tooth is 0 °～10 °.
5. accurate milling cutter as claimed in claim 4, is characterized in that, the blade anterior angle angle of described cutter tooth is 4 °～9 °.
6. accurate milling cutter as claimed in claim 1, is characterized in that, described milling cutter diameter is 0.4mm～2.5mm.
7. accurate milling cutter as claimed in claim 1, is characterized in that, described milling cutter surface is coated with abrasion resistant coatings.
8. accurate milling cutter as claimed in claim 7, is characterized in that, described abrasion resistant coatings is diamond coatings.
9. accurate milling cutter as claimed in claim 1, is characterized in that, described milling cutter is chip breaking type milling cutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320538080.7U CN203459733U (en) | 2013-08-30 | 2013-08-30 | Precise milling cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320538080.7U CN203459733U (en) | 2013-08-30 | 2013-08-30 | Precise milling cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203459733U true CN203459733U (en) | 2014-03-05 |
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ID=50172116
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320538080.7U Expired - Fee Related CN203459733U (en) | 2013-08-30 | 2013-08-30 | Precise milling cutter |
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| CN (1) | CN203459733U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433542A (en) * | 2013-08-30 | 2013-12-11 | 深圳市金洲精工科技股份有限公司 | Precision milling cutter and processing method thereof |
| CN113941658A (en) * | 2020-07-15 | 2022-01-18 | 倍腾国际股份有限公司 | Punch manufacturing method |
-
2013
- 2013-08-30 CN CN201320538080.7U patent/CN203459733U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433542A (en) * | 2013-08-30 | 2013-12-11 | 深圳市金洲精工科技股份有限公司 | Precision milling cutter and processing method thereof |
| CN103433542B (en) * | 2013-08-30 | 2016-06-22 | 深圳市金洲精工科技股份有限公司 | A kind of accurate milling cutter |
| CN113941658A (en) * | 2020-07-15 | 2022-01-18 | 倍腾国际股份有限公司 | Punch manufacturing method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140305 Termination date: 20210830 |