CN208976931U - A kind of milling cutter improving helical milling machining accuracy - Google Patents
A kind of milling cutter improving helical milling machining accuracy Download PDFInfo
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- CN208976931U CN208976931U CN201821187593.7U CN201821187593U CN208976931U CN 208976931 U CN208976931 U CN 208976931U CN 201821187593 U CN201821187593 U CN 201821187593U CN 208976931 U CN208976931 U CN 208976931U
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Abstract
The utility model proposes a kind of milling cutter for improving helical milling machining accuracy, belong to field of machining, including knife handle and processing part, the processing department point include finishing section, reaming processing sections and roughing section；Knife handle is connected with finishing section, and finishing section is connected with reaming processing sections, and reaming processing sections are connected with roughing section；Shank diameter is equal with finishing section diameter, and finishing section is cylindrical body, and reaming processing sections are the frustum of a cone, and frustum of a cone bigger diameter end is equal with finishing section junction diameter, and frustum of a cone miner diameter end is equal with roughing section junction diameter, and roughing section is cylindrical body；The milling cutter, which eliminates helical milling, is influenced aperture error caused by being deformed by radial force because of cutter in the process, the aperture finally measured meets required precision, and enable milling cutter that roughing and finishing milling twice can be completed by a milling, improve Milling Accuracy and processing efficiency.
Description
Technical field
The utility model belongs to field of machining, and in particular to a kind of milling cutter for improving helical milling machining accuracy.
Background technique
With the rapid development of aeronautical and space technology, the new material with superperformance is widely used in the zero of aircraft
In component, these new materials meet the performance requirements such as the required high-precision of aircraft, high reliability, lightweight.As used extensively
Titanium alloy in aircraft industry, density are about 4500kg/m, and density is small, and intensity is big, and high temperature resistant, corrosion-resistant.So
And titanium alloy hardness is big, causes cutter in process that can be influenced and be deformed by biggish cutting force, influences machining accuracy,
Belong to typical difficult-to-machine material.
The processing method of traditional machining titanium alloy is drilling, and drilling processing belongs to semi-enclosed processing, and cutting is caused to produce
Raw heat cannot be discharged in time, reduce the cutting ability of drill bit, accelerate the abrasion of cutter.And drilling when, chip cannot and
When be discharged, will lead to machined surface scuffing, influence machining accuracy.
Helical milling drilling is a kind of novel processing method using Milling Principle, is that the cutter for being less than aperture is passed through with one
The autobiography of itself and the drill process to be revolved around the center in hole with certain eccentricity.Helical milling technique passes through cutter
Brill-expansion-hinge operation can be completed in single feeding, improves processing efficiency, and be conducive to the discharge of chip, alleviates processing
The excessively high problem of temperature reduces scuffing of the chip to machined surface, improves the service life of cutter and the quality of hole wall.
Therefore it is very necessary for the further investigation of helical milling, presently, there are the problem of be: the lesser hole of helical milling
When diameter, used milling cutter diameter also very little will receive biggish radial force in milling process, generates cutter and is biased to aperture
The deformation at center, prevent the aperture processed is less than normal and machining accuracy is from meeting the requirements.Therefore, during reparation helical milling
Because by radial force to be influenced aperture error caused by being deformed very necessary for cutter.
Utility model content
In order to solve the above problem, the utility model proposes a kind of milling cutters for improving helical milling machining accuracy, comprising: knife handle
With processing part, the processing department point includes finishing section, reaming processing sections and roughing section；
Knife handle is connected with finishing section, and finishing section is connected with reaming processing sections, reaming processing sections and roughing section
It is connected；
Shank diameter is equal with finishing section diameter, and finishing section is cylindrical body, and reaming processing sections are the frustum of a cone, the frustum of a cone
Bigger diameter end is equal with finishing section junction diameter, and frustum of a cone miner diameter end is equal with roughing section junction diameter, roughing section
For cylindrical body；
Wherein, finishing section diameter is the sum of roughing section diameter and 2 times of cutter distortion, and length is working depth
1.2~1.6 times；
Wherein, roughing section diameter is the diameter of preliminary selected milling cutter processing cutter, length be working depth 1.2~
1.6 again；
A kind of design method for the milling cutter improving helical milling machining accuracy, is added using a kind of raising helical milling
The milling cutter of work precision is realized, is included the following steps:
Step 1: selected machined material determines processing pore size and working depth, conventionally preliminary selected
Milling cutter processing cutter sets machined parameters；
Step 2: establishing the threedimensional model of preliminary selected milling cutter tool；
Step 3: carrying out helical milling test under the machined parameters of setting, test out milling cutter tool milling using dynamometer
When the radial force size that is subject to, radial force size when recording steady cutting every time；
Step 4: the average value of radial force when calculating steady cutting；
Step 5: the milling cutter tool threedimensional model of foundation being imported in finite element emulation software, is set in the simulation software
The radial force average value being calculated is applied on milling cutter tool by cutter material attribute, is carried out static analysis, is obtained milling cutter knife
Has deflection；
Step 6: milling cutter tool being designed according to milling cutter tool deflection, milling cutter tool is made of processing part and knife handle, institute
It states processing department and is divided into roughing section, reaming processing sections and finishing section；Roughing section, expansion are followed successively by knife handle since point of a knife
Hole machined section, finishing section, wherein roughing section is cylindrical body, and diameter is the diameter of preliminary selected milling cutter processing cutter, length
It is 1.2~1.6 times of working depth；Finishing section is cylindrical body, and finishing section diameter is roughing section diameter and 2 times of cutter
The sum of deflection, length are 1.2~1.6 times of working depth；Reaming processing sections be the frustum of a cone, wherein frustum of a cone miner diameter end with
Roughing section junction diameter is equal, and frustum of a cone bigger diameter end is equal with finishing section junction diameter, and length is the 1 of working depth
~1.4 times；Shank diameter is equal with finishing section diameter；
Step 7: carrying out helical milling test using design milling cutter tool, whether aperture obtained by checkout facility, which meets precision, is wanted
It asks；If not being able to satisfy required precision, to design milling cutter tool as tested object, helical milling test is carried out, step is returned to
Rapid 3 test again, test resulting aperture until helical milling and meet required precision, Design Milling finishes.
Wherein, described in step 1 setting machined parameters include cutter rotation revolving speed, cutter revolution revolving speed, tool axis with
Axially bored line eccentricity and screw pitch；
Helical milling test is carried out under the machined parameters of setting, testing time is more than or equal to 5 times；
The threedimensional model of the preliminary selected milling cutter of foundation described in step 2 uses software UG or SolidWorks；
Finite element emulation software described in step 5 is Abaqus.
Advantageous effects:
The utility model is influenced to be deformed because of milling cutter for during helical milling drilling by radial force, causes aperture inclined
The problem of small and precision cannot be met the requirements, provides a kind of milling cutter for improving helical milling machining accuracy, which eliminates
Aperture error caused by being deformed is influenced by radial force because of cutter during helical milling, and the aperture finally measured meets essence
Degree requires, and edge of milling cutter part is divided into roughing by the deflection that radial force generates according to during Tool in Milling by this method
Section, reaming processing sections, finishing section three parts, enable milling cutter that roughing and finishing can be completed by a milling
Milling twice improves Milling Accuracy and processing efficiency.
Detailed description of the invention
Fig. 1 is a kind of milling cutter of raising helical milling machining accuracy of the utility model embodiment and the process of design method
Figure；
Fig. 2 is a kind of milling cutter threedimensional model of raising helical milling machining accuracy of the utility model embodiment；
Fig. 3 is that the Abaqus of the utility model embodiment emulates cutter distortion figure and displacement cloud atlas；
Fig. 4 is the measuring accuracy position view of the utility model embodiment.
1-knife handle in figure, 2-processing parts, 3-finishing sections, 4-reaming processing sections, 5-roughing sections, d1-are thick
Processing sections diameter, d2-reaming processing sections diameter, d3-finishing section diameter, d4-shank diameter.
Specific embodiment
Utility model is described further with specific implementation example with reference to the accompanying drawing:
The utility model proposes a kind of milling cutters for improving helical milling machining accuracy, comprising: knife handle 1 and processing part 2, institute
Stating processing department point includes finishing section 3, reaming processing sections 4 and roughing section 5；
Knife handle 1 is connected with finishing section 3, and finishing section 3 is connected with reaming processing sections 4, and reaming processing sections 4 add with thick
Workshop section 5 is connected；
Shank diameter d4 is equal with finishing section diameter d3, and finishing section 3 is cylindrical body, and reaming processing sections 4 are the frustum of a cone,
Frustum of a cone bigger diameter end is equal with 3 junction diameter of finishing section, and frustum of a cone miner diameter end is equal with 5 junction diameter of roughing section,
Roughing section is 5 cylindrical bodies；
Wherein, finishing section diameter d3 is the sum of roughing section diameter d1 and 2 times of cutter distortion, and length is that processing is deep
1.2~1.6 times of degree；
Wherein, roughing section diameter d1 is the diameter of preliminary selected milling cutter processing cutter, length be working depth 1.2~
1.6 again；
A kind of design method for the milling cutter improving helical milling machining accuracy, is added using a kind of raising helical milling
The milling cutter of work precision is realized, is included the following steps, as shown in Figure 1:
Step 1: selecting titanium alloy as machined material in the present embodiment, the diameter in hole to be processed is
Working depth 3mm；Four blade milling cutter of tool selection hard alloy, cutter diameter 4mm, cutter overall length 50mm, the long 35mm of sword, processing
Parameter are as follows: cutter rotation revolving speed is 1930r/min, and cutter revolves revolving speed as 50r/min, and tool axis is with axially bored line eccentricity
1mm, screw pitch 0.5mm；
Step 2: using UG software, establish the threedimensional model of preliminary selected milling cutter tool, as shown in Figure 2；
Step 3: carrying out helical milling test, radial force size when Tool in Milling is measured using dynamometer, carries out 14 altogether
Secondary test, radial force when steadily cutting are as follows: 57.974N, 62.216N, 64.7612N, 70.5586N, 69.7102N, 66.1752
N, 76.356N, 73.528N, 72.5382N, 75.9318N, 72.9624N, 75.2248N, 75.3662N, 75.694N, N are single
Position newton；
Step 4: the average value of radial force is 71.607N when calculating steady cutting；
Step 5: the milling cutter tool threedimensional model of foundation being imported in Abaqus simulation software, is set in the simulation software
The radial force 71.607N measured is applied on cutter by cutter material attribute, is carried out static analysis, is obtained deformation pattern and position
Cloud atlas is moved, as shown in figure 3, obtaining milling cutter tool deflection is 0.0982mm；
Step 6: cutter being designed according to milling cutter tool deflection, cutter is made of processing part 2 and knife handle 1, the processing
Part 2 is roughing section 5, reaming processing sections 4 and finishing section 3.Roughing section 5, expansion are followed successively by knife handle 1 since point of a knife
Hole machined section 4, finishing section 3, as shown in Fig. 2, wherein roughing section 5 is cylindrical body, diameter is tentatively selected milling cutter processing knife
The diameter of tool is 4mm, and length is 1.2~1.6 times of working depth, and it is 4.5mm that the present embodiment, which takes 1.5 times,；Finishing section 3 is
Cylindrical body, finishing section diameter d3 are roughing section diameter d1 size and 2 times of the sum of cutter distortion, be 4mm+2 ×
0.0982mm=4.1964mm, length are 1.2~1.6 times of working depth, and it is 4.5mm that the present embodiment, which takes 1.5 times,；Reaming processing
Section 4 is the frustum of a cone, wherein frustum of a cone miner diameter end is equal with 5 junction diameter of roughing section, frustum of a cone bigger diameter end and finishing section
3 junction diameters are equal, and length is 1~1.4 times of working depth, and it is 3.9mm that the present embodiment, which takes 1.3 times,；Shank diameter d4 with
Finishing section d3 diameter is equal；
Step 7: carrying out helical milling test using the milling cutter of design, 5 different locations of checkout facility accuracy test are such as schemed
Shown in 4, the diameter phi in hole to be processed is 6mm, depth 3mm, averagely takes 5 test points in the depth direction, be denoted as 1,2,
3,4,5, the aperture of this 5 positions is measured respectively are as follows: 6.016mm, 6.014mm, 6.007mm, 6.009mm, 6.010mm, full
FootTolerance, Design Milling finishes.
Claims (3)
1. a kind of milling cutter for improving helical milling machining accuracy characterized by comprising knife handle and processing part, the processing
Part includes finishing section, reaming processing sections and roughing section；
Knife handle is connected with finishing section, and finishing section is connected with reaming processing sections, and reaming processing sections are connected with roughing section
It connects；
Shank diameter is equal with finishing section diameter, and finishing section is cylindrical body, and reaming processing sections are the frustum of a cone, frustum of a cone major diameter
End is equal with finishing section junction diameter, and frustum of a cone miner diameter end is equal with roughing section junction diameter, roughing Duan Weiyuan
Cylinder.
2. a kind of milling cutter for improving helical milling machining accuracy according to claim 1, it is characterised in that: finishing section diameter
For the sum of roughing section diameter and 2 times of cutter distortion, length is 1.2~1.6 times of working depth.
3. a kind of milling cutter for improving helical milling machining accuracy according to claim 1, it is characterised in that: roughing section diameter
For the diameter of tentatively selected milling cutter processing cutter, length is 1.2~1.6 times of working depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201821187593.7U CN208976931U (en) | 2018-07-25 | 2018-07-25 | A kind of milling cutter improving helical milling machining accuracy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821187593.7U CN208976931U (en) | 2018-07-25 | 2018-07-25 | A kind of milling cutter improving helical milling machining accuracy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108723454A (en) * | 2018-07-25 | 2018-11-02 | 沈阳航空航天大学 | A kind of milling cutter and design method improving helical milling machining accuracy |
| CN110866357A (en) * | 2019-11-12 | 2020-03-06 | 沈阳航空航天大学 | Method for evaluating influence of tool deformation on spiral milling hole-making precision |
-
2018
- 2018-07-25 CN CN201821187593.7U patent/CN208976931U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108723454A (en) * | 2018-07-25 | 2018-11-02 | 沈阳航空航天大学 | A kind of milling cutter and design method improving helical milling machining accuracy |
| CN108723454B (en) * | 2018-07-25 | 2023-12-26 | 沈阳航空航天大学 | Milling cutter for improving spiral milling precision and design method |
| CN110866357A (en) * | 2019-11-12 | 2020-03-06 | 沈阳航空航天大学 | Method for evaluating influence of tool deformation on spiral milling hole-making precision |
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