CN103286364A - Circular-arc-shaped top milling tool for processing flat curved surface - Google Patents
Circular-arc-shaped top milling tool for processing flat curved surface Download PDFInfo
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- CN103286364A CN103286364A CN201310268562XA CN201310268562A CN103286364A CN 103286364 A CN103286364 A CN 103286364A CN 201310268562X A CN201310268562X A CN 201310268562XA CN 201310268562 A CN201310268562 A CN 201310268562A CN 103286364 A CN103286364 A CN 103286364A
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Abstract
The invention discloses a circular-arc-shaped top milling tool for processing a flat curved surface, relates to a milling tool, and aims to solve the problems of narrow processing bandwidth, over-small step pitch, over-large quantity of tool paths and low frequency when the existing small-diameter ball milling tool is used for processing a flat free curved surface. According to an integrated milling tool, a first tool handle, a second tool handle and a first tool bit are fixedly connected in sequence from bottom to top; the diameter of the second tool handle is smaller than that of the first tool handle; the diameter of a bottom circle of the circular-arc-shaped top of the first tool bit is equal to that of the first tool handle; a central angle of a circular-arc-shaped top tool bit is beta1; a relationship between the circular arc radius (R) of the first tool bit and the radius (r) of the first tool handle is that R is equal to r divided by sin(beta1/2). According to a split type milling tool, a second tool bit is detachably arranged at one end of a third tool handle; the diameter of the third tool handle is smaller than that of the second tool bit; a tool handle cooling channel is formed in the third tool handle along the axis of the third tool handle; a tool bit cooling channel is formed in the center of the length direction of the second tool bit. The circular-arc-shaped top milling tool is used for processing the flat curved surface.
Description
Technical field
The present invention relates to a kind of milling cutter, be specifically related to a kind of smooth Machining of Curved Surface dome milling cutter.
Background technology
At the complex-shaped surface mould curved surface with a large amount of smooth curved surfaces, car panel die for example, its architectural feature complexity, material removal amount are big.The number of cutters that needs in the one cover full-sized car cladding member mold processing can reach tens of, employed cutter mostly is universal cutters such as flat cutter, endless knife and ball head knife greatly, and the problem that the minor diameter rose cutter produces in three process is mainly as follows: the processing bandwidth is little, efficient is low.The cutter of normal use is exactly the ball head knife of minor diameter in fine finishining, for the scallop-height that guarantees to process profile is very little, it is very little to guarantee that under the condition of little processing bandwidth cutter adds the stride value in man-hour, causes cutter track to increase, prolong process time, inefficiency.
In sum, there is processing belt width in existing minor diameter rose cutter when the smooth type free curved surface of processing, and step pitch is too small, and cutter track is too much, the problem of inefficiency.
Summary of the invention
The objective of the invention is to have processing belt width in order to solve existing minor diameter rose cutter when the smooth type free curved surface of processing, step pitch is too small, and cutter track is too much, the problem of inefficiency.And then provide a kind of smooth Machining of Curved Surface dome milling cutter.
Technical scheme of the present invention is: a kind of smooth Machining of Curved Surface dome milling cutter, milling cutter is the monoblock type milling cutter, it comprises first handle of a knife, described milling cutter also comprises second handle of a knife and first cutter head, first handle of a knife, second handle of a knife and first cutter head are fixedly connected sequentially from the bottom to top, the diameter of second handle of a knife is less than the diameter of first handle of a knife, circular diameter is identical with the diameter of first handle of a knife at the bottom of the dome of first cutter head, and the pass of the arc radius R of first cutter head and the radius r of first handle of a knife is: R=r ÷ sin (β
1/ 2), the central angle β of first cutter head
1Be 30 °, 60 °, 90 °, 120 ° or 150 °, anterior angle γ
1Be 4 °-8 °, relief angle α
1Be 15 °-20 °, oblique cutting edge inclination φ
1It is 6 °-8 °.
The present invention also provides a kind of smooth Machining of Curved Surface dome milling cutter, described milling cutter is split type milling cutter, it comprises the 3rd handle of a knife, described milling cutter also comprises second cutter head, second cutter head detachably is arranged on an end of the 3rd handle of a knife, the diameter of the 3rd handle of a knife is less than the diameter of second cutter head, the 3rd handle of a knife is provided with the handle of a knife cooling duct along its axis, second cutter head is provided with the cutter head cooling duct along the center of its length direction, second cutter head is provided with the cooling fluid flow export that is connected with the cutter head cooling duct, the central angle β of second cutter head
2Be 30 °, 60 °, 90 °, 120 ° or 150 °, anterior angle γ
2Be 2 °-4 °, relief angle α
2Be 12 °-15 °, oblique cutting edge inclination φ
2It is 4 °-6 °.
The present invention compared with prior art has following effect:
1. monoblock type milling cutter of the present invention is mainly used in semifinishing and the fine finishining of smooth class curved surface.This milling cutter has adopted the undergauge structure, namely the dome radius of first cutter head is identical with the radius of first handle of a knife, the diameter of second handle of a knife is less than the diameter of first handle of a knife, said structure can effectively prevent the interference between the inwall of handle of a knife and smooth curved surface, increase the sharpness of bottom side sword simultaneously, can reach desirable pre-back chipping purpose.Simultaneously, the present invention compares with common helical edges, grinds simply, and it is low that intensity height, cutter grind cost.
2. the split type milling cutter of the present invention, it is mainly used in roughing.The diameter of the 3rd handle of a knife of this milling cutter can partly carry out good cooling and lubrication less than the diameter of second cutter head to the relatively poor point of a knife of cutting state in working angles.
3. the present invention compares with existing ball head knife, has adopted partial arc to push up to replace bulb in the ball head knife, under the prerequisite of identical handle of a knife diameter, can increase cutter processing bandwidth.Be to guarantee in the process to increase the cutter line-spacing under the situation of identical machined surface quality, raise the efficiency; Under the situation of identical line-spacing, can reduce residual height again, improved surface quality.Simultaneously, under identical handle of a knife diameter and identical residual height situation, the processing bandwidth of dome milling cutter obviously is better than the rose cutter with the handle of a knife diameter.
The present invention in actual applications the selection of the central angle of dome select according to the gradient of processing mean camber, selection principle is that ruling grade can not be greater than half of arc chord angle β.In the actual processing, ball head knife processing is all used in the processing of all curved surfaces, when the processing ruling grade is no more than in the curved surface of β/2, the most cutting edge of the rose cutter of identical undoubtedly bulb diameter does not all participate in cutting, increased tool diameter on the contrary, but this has just limited the row space of cutter in process.And the dome milling cutter has solved this problem well, but has increased the row space of cutter.When reducing tool diameter, corresponding simplification has also been done in the processing of tooth shape, sharpening is convenient, can protect positive higher processing precision.
5. the present invention is in ruling grade is no more than 30 ° smooth residential quarter rate curved surface, it is that 8mm, central angle are 60 ° dome milling cutter that the present invention adopts diameter, if line-spacing all is 0.4mm, under the situation of cutting-in 0.2mm, diameter be 8mm ball head knife processing after scallop-height be 0.0025mm, be 60 ° of dome milling cutters and use the 8mm central angle, surperficial residual height is 0.00125mm, the residual height in surface reduces half, obviously improves machined surface quality.The dome milling cutter can with carry out better curvature coupling with smooth curved surface.The present invention and diameter are that the ball head knife of 16mm is compared, and obviously dwindled tool diameter, and in the diapire junction, this milling cutter of dome can also carry out pre-back chipping, reduce the workload in the back chipping operation.
6. milling cutter of the present invention is applied in the roughing and semifinishing process of smooth curved surface, choose the dome cutter of suitable central angle, can add under the prerequisite of efficient in assurance, reduce simultaneously the residual shoulder height of blank relatively, make blank allowance more even, be conducive to the steady cutting of cutter in the subsequent handling.
Description of drawings
Fig. 1 is the front view of monoblock type milling cutter of the present invention; Fig. 2 is the vertical view of Fig. 1; Fig. 3 is the main cutaway view of split type milling cutter; Fig. 4 is the front view of second cutter head; Fig. 5 is that Fig. 4 is at the partial enlarged drawing at C place.
The specific embodiment
The specific embodiment one: present embodiment is described in conjunction with Fig. 1 and Fig. 2, the present embodiment milling cutter is the monoblock type milling cutter, it comprises first handle of a knife 1, described milling cutter also comprises second handle of a knife 2 and first cutter head 3, first handle of a knife 1, second handle of a knife 2 and first cutter head 3 are fixedly connected sequentially from the bottom to top, the diameter of second handle of a knife 2 is less than the diameter of first handle of a knife 1, circular diameter is identical with the diameter of first handle of a knife 1 at the bottom of the dome of first cutter head 3, and the pass of the arc radius R of first cutter head 3 and the radius r of first handle of a knife 1 is: R=r ÷ sin (β
1/ 2), the central angle β of first cutter head 3
1Be 30 °, 60 °, 90 °, 120 ° or 150 °, anterior angle γ
1Be 4 °-8 °, relief angle α
1Be 15 °-20 °, oblique cutting edge inclination φ
1It is 6 °-8 °
The specific embodiment two: in conjunction with Fig. 1 and Fig. 2 present embodiment is described, the arc transition sword radius of first cutter head 3 of present embodiment and second handle of a knife, 2 intersections is 0.2mm-0.5mm.So arrange, overcome the inhomogeneous problem of shearing force.Other composition is identical with the specific embodiment one with annexation.
The specific embodiment three: in conjunction with Fig. 1 and Fig. 2 present embodiment is described, the diameter of first handle of a knife 1 of present embodiment is 4mm-16mm.So arrange, it is less than normal relatively to be used for the fine finishining tool diameter, can be more accurate to the processing of tooth shape.Other composition is identical with the specific embodiment two with annexation.
The specific embodiment four: in conjunction with Fig. 2 present embodiment is described, the oblique cutting edge inclination φ of present embodiment
1It is 8 °.So arrange, guarantee pre-back chipping effect, prevent from interfering.Other composition is identical with the specific embodiment three with annexation.
The specific embodiment five: present embodiment is described in conjunction with Fig. 3-Fig. 5, the milling cutter of present embodiment is split type milling cutter, it comprises the 3rd handle of a knife 4, described milling cutter also comprises second cutter head 5, second cutter head 5 detachably is arranged on an end of the 3rd handle of a knife 4, the diameter of the 3rd handle of a knife 4 is less than the diameter of second cutter head 5, the 3rd handle of a knife 4 is provided with handle of a knife cooling duct 6 along its axis, second cutter head 5 is provided with cutter head cooling duct 7 along the center of its length direction, second cutter head 5 is provided with the central angle β of cooling fluid flow export 8, the second cutter heads 5 that are connected with cutter head cooling duct 7
2Be 30 °, 60 °, 90 °, 120 ° or 150 °, anterior angle γ
2Be 2 °-4 °, relief angle α
2Be 12 °-15 °, oblique cutting edge inclination φ
2It is 4 °-6 °.
The specific embodiment six: in conjunction with Fig. 3 present embodiment is described, the diameter of the 3rd handle of a knife 4 of present embodiment is 12mm-30mm.So arrange, be used for roughing, tool diameter must strengthen, and increases the intensity of cutter.Other composition is identical with the specific embodiment five with annexation.
The specific embodiment seven: in conjunction with Fig. 4 present embodiment is described, the oblique cutting edge inclination φ of present embodiment
1It is 5 °.So arrange, guarantee back chipping effect and cutter intensity.Other composition is identical with the specific embodiment six with annexation.
The specific embodiment eight: in conjunction with Fig. 3 present embodiment is described, second cutter head 5 of present embodiment is provided with spanner clamping concave station 9.So arrange, be convenient to tighten cutter head.Other composition is identical with the specific embodiment seven with annexation.
Claims (8)
1. smooth Machining of Curved Surface dome milling cutter, described milling cutter is the monoblock type milling cutter, it comprises first handle of a knife (1), it is characterized in that: described milling cutter also comprises second handle of a knife (2) and first cutter head (3), first handle of a knife (1), second handle of a knife (2) and first cutter head (3) are fixedly connected sequentially from the bottom to top, the diameter of second handle of a knife (2) is less than the diameter of first handle of a knife (1), circular diameter is identical with the diameter of first handle of a knife (1) at the bottom of the dome of first cutter head (3), and the arc radius (R) of first cutter head (3) with the pass of the radius (r) of first handle of a knife (1) is: R=r ÷ sin (β
1/ 2), the central angle (β of first cutter head (3)
1) be 30 °, 60 °, 90 °, 120 ° or 150 °, anterior angle (γ
1) be 4 °-8 °, relief angle (α
1) be 15 °-20 °, oblique cutting edge inclination (φ
1) be 6 °-8 °.
2. a kind of smooth Machining of Curved Surface dome milling cutter according to claim 1 is characterized in that: described first cutter head (3) is 0.2mm-0.5mm with the arc transition sword radius of second handle of a knife (2) intersection.
3. a kind of smooth Machining of Curved Surface dome milling cutter according to claim 2, it is characterized in that: the diameter of described first handle of a knife (1) is 4mm-16mm.
4. according to claim 1,2 or 3 described a kind of smooth Machining of Curved Surface dome milling cutters, it is characterized in that: described oblique cutting edge inclination (φ
1) be 8 °.
5. smooth Machining of Curved Surface dome milling cutter, described milling cutter is split type milling cutter, it comprises the 3rd handle of a knife (4), it is characterized in that: described milling cutter also comprises second cutter head (5), second cutter head (5) detachably is arranged on an end of the 3rd handle of a knife (4), the diameter of the 3rd handle of a knife (4) is less than the diameter of second cutter head (5), the 3rd handle of a knife (4) is provided with handle of a knife cooling duct (6) along its axis, second cutter head (5) is provided with cutter head cooling duct (7) along the center of its length direction, second cutter head (5) is provided with the cooling fluid flow export (8) that is connected with cutter head cooling duct (7), the central angle (β of second cutter head (5)
2) be 30 °, 60 °, 90 °, 120 ° or 150 °, anterior angle (γ
2) be 2 °-4 °, relief angle (α
2) be 12 °-15 °, oblique cutting edge inclination (φ
2) be 4 °-6 °.
6. a kind of smooth Machining of Curved Surface dome milling cutter according to claim 5, it is characterized in that: the diameter of described the 3rd handle of a knife (4) is 12mm-30mm.
7. a kind of smooth Machining of Curved Surface dome milling cutter according to claim 6 is characterized in that: described oblique cutting edge inclination (φ
1) be 5 °.
8. a kind of smooth Machining of Curved Surface dome milling cutter according to claim 7, it is characterized in that: described second cutter head (5) is provided with spanner clamping concave station (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310268562XA CN103286364A (en) | 2013-06-28 | 2013-06-28 | Circular-arc-shaped top milling tool for processing flat curved surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310268562XA CN103286364A (en) | 2013-06-28 | 2013-06-28 | Circular-arc-shaped top milling tool for processing flat curved surface |
Publications (1)
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|---|---|
| CN103286364A true CN103286364A (en) | 2013-09-11 |
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ID=49088182
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|---|---|---|---|
| CN201310268562XA Pending CN103286364A (en) | 2013-06-28 | 2013-06-28 | Circular-arc-shaped top milling tool for processing flat curved surface |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639506A (en) * | 2013-12-23 | 2014-03-19 | 哈尔滨理工大学 | Special cutter bar for wide-line processing of mold |
| CN104174936A (en) * | 2014-07-17 | 2014-12-03 | 中国科学院近代物理研究所 | Machining method for modulation line of radio frequency quadrupole single-vane pole head |
| CN104174936B (en) * | 2014-07-17 | 2017-01-04 | 中国科学院近代物理研究所 | The processing method of radio frequency four polar field single-blade cartridge modulation lines |
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| JPH11156620A (en) * | 1997-11-25 | 1999-06-15 | Hitachi Tool Eng Ltd | Circular arc blade end mill |
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2013
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639506A (en) * | 2013-12-23 | 2014-03-19 | 哈尔滨理工大学 | Special cutter bar for wide-line processing of mold |
| CN103639506B (en) * | 2013-12-23 | 2017-02-15 | 哈尔滨理工大学 | Special cutter bar for wide-line processing of mold |
| CN104174936A (en) * | 2014-07-17 | 2014-12-03 | 中国科学院近代物理研究所 | Machining method for modulation line of radio frequency quadrupole single-vane pole head |
| CN104174936B (en) * | 2014-07-17 | 2017-01-04 | 中国科学院近代物理研究所 | The processing method of radio frequency four polar field single-blade cartridge modulation lines |
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Application publication date: 20130911 |