CN104439919B - Using the method for low-melting alloy secondary process thin-walled flexible member - Google Patents
Using the method for low-melting alloy secondary process thin-walled flexible member Download PDFInfo
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- CN104439919B CN104439919B CN201410572919.8A CN201410572919A CN104439919B CN 104439919 B CN104439919 B CN 104439919B CN 201410572919 A CN201410572919 A CN 201410572919A CN 104439919 B CN104439919 B CN 104439919B
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- flexible member
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention discloses a kind of method of utilization low-melting alloy secondary process thin-walled flexible member, Auxiliary support is built under the thin-walled feature to be processed in advance, the material of Auxiliary support is low-melting alloy, is comprised the following steps that：1）Make flexible member blank.2）Cleaning flexible member blank.3）The groove of processing filling auxiliary supporting material.4）The selection and filling of auxiliary supporting material.5）Minuteness milling processes the thin-walled feature of flexible member.6）Clamper for disassembling, removal and recovery auxiliary supporting material.7）Deburring is processed.8）Flexible member is separated with blank parent.9）Cleaning flexible member.Method considers that the thin-walled feature of processing only has 10 20um, easily deforms and is broken, and low-melting alloy is stacked in into thin-walled bottom, as Auxiliary support in processing, the rigid purpose of thin-walled feature is increased to reach.
Description
Technical field
The present invention relates to a kind of method of utilization low-melting alloy secondary process thin-walled flexible member, belong to minuteness milling and add
The technical field of thin-walled parts is processed in work.
Background technology
At present, microelectromechanical systems has miniaturization, integrated, intelligentized feature, compared with macrosystem, can
Produce in enormous quantities, low cost, performance are high, or even can realize the function to be realized of macrosystem.Wherein Miniature thin-wall is scratched
Property element is widely used in inertial navigation and control technology field.Miniature thin-wall flexible member size is small, with high-aspect-ratio
Structure, is difficulty of processing is larger, required precision is higher in micro-inertia measuring device part part.Miniature thin-wall flexible member
Processing is the support technology and key technology of following inertial navigation and control field, by the science and technology and industrial production of the mankind
Produce far-reaching influence.
Minuteness milling process technology is the Fine Machinery processing technology of a kind of high efficiency, precision and low cost, can be applied
In different complex three-dimensional structures, curved surface features Micro-parts process, workpiece material extensively, in recent years Aero-Space,
The industrial circles such as Making mold, automobile making and precision optical machinery quickly grow.During minuteness milling processing thin-walled parts, essence
Really the thickness of control thin-walled, reduces the deformation of thin-walled, prevents the fracture of thin-walled and ensures that the workpiece surface quality after processing is
The important problem always studied.Ratchev etc. for thin-walled parts design feature, using finite element technique, by deformation
Analysis obtains the deformation pattern for shielding part, recycles numerical control optimisation technique to carry out appropriate amendment, Ke Yibao to cutter path
The high accuracy processing request of thin-walled parts is demonstrate,proved, is conducive to raising [Ratchev S, the Liu S, Becker of crudy and efficiency
A.A Error Compensation Strategy in Milling Flexible Thin-Wall Parts.Journal
of Materials Processing Technology.2005:162-163,673-681]；The petrosa of Japan educates ocean using double
Axle lathe is processed from the two side of part respectively, and so as to the deformation that counteracts thin-walled, [petrosa educates foreign .High accurate of
Thin wall shape workpiece by end mill. Japan's mechanical society collection of thesis .65 (632)：415-420]；State
Interior Harbin Institute of Technology obtains serious achievement, Wang Bo of Harbin Institute of Technology etc. and leads on miniature machine tool in this field
The method for crossing optimization processing technology parameter, processes the inertia thin-walled flexible member with three-dimensional structure, the device flexibility position
Walled thickness only has 8um [Wang Bo, beam winter jasmine, the minuteness milling of Sun Yazhou, Tan Ya inertial MEMSs of the bright with three-dimensional structure
Processing sensing technology journals .19 (5):1472-1476].But seek the optimal procedure parameters process of rapidoprint not of the same race
Relatively cumbersome complexity, the method is poor for processing the versatility of different materials, and the selection of cutting parameter smaller is also reduced
Processing efficiency.
Although the above research has promoted the processing of thin-wall workpiece to a certain extent, only have for walled thickness
, also there is very big deficiency in the processed and applied of above method in the Miniature thin-wall flexible devices of 10-20um.
Some investigators have found low-melting alloy due to its unique property in recent years, have been applied to medical treatment, casting
The field such as make, automatically control and fabricate.In minuteness milling processing, ten thousand bright proposing of Shandong University use low-melting alloy
Construct workpiece extension border, the generation of burr is transformed on low-melting alloy, with control Work-piece burr generation [referring to
Chinese patent application CN102211221A《The method that burr generation in microfabrication is controlled using low-melting alloy》].But
The method cannot be applied directly in the processing of thin-walled flexible member, it is necessary to further creative work, makes corresponding technology
Improve.
In the processing of thin-walled flexible member, low-melting alloy is banked up as the Auxiliary support of thin-walled feature, to increase
Thin-walled feature rigidity, prevents thin-walled feature distortion and the research of fracture from not furtherd investigate, at present in thin-walled flexible devices
Processing in also and have no correlative study.
In sum, a kind of high efficiency is sought, low cost, the processing method that high accuracy processes three-dimensional thin-walled parts seems outstanding
For important.
The content of the invention
The purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art, there is provided one kind utilizes low-melting alloy secondary process
The method of thin-walled flexible member, the method considers that the thin-walled feature of processing only has 10-20um, easily deforms and is broken, will be low
Melting alloy is stacked in thin-walled bottom, as Auxiliary support in processing, the rigid purpose of thin-walled feature is increased to reach.
To achieve the above object, the present invention uses following technical proposals：
A kind of method of utilization low-melting alloy secondary process thin-walled flexible member, in advance under the thin-walled feature to be processed
Auxiliary support is built, the material of Auxiliary support is low-melting alloy, is comprised the following steps：
1) flexible member blank is made；
2) flexible member blank is cleaned；
3) groove of processing filling auxiliary supporting material；The flexible member blank clamping that will be cleaned up adds to five axles are fine
On work center, knife is ensured to knife precision using laser；Lathe Milling Process flexible member blank upper surface is started, and with upper table
The groove of filling auxiliary supporting material is processed on the basis of face；
4) selection and filling of auxiliary supporting material；Selection fusing point is 70 DEG C of low-melting alloy as Auxiliary support material
Material, heating low-melting alloy melt it and fill it into step 3) in processing groove in；
5) minuteness milling processes the thin-walled feature of flexible member；With hard alloy two-edged square end mill, from flexible unit
Part blank upper surface starts successively milling, processes very low power, special in bottom land residue 15mm thick thin-walled during milling very low power
Levy；
6) clamper for disassembling, removal and recovery auxiliary supporting material；After machining, under flexible member is dismantled from fixture
Come；Carry out the removal of auxiliary supporting material, concrete operations are during element is put into tweezers fill 80 DEG C of beakers of hot water；Eutectic
Point alloy is changed into rapidly liquid under hot water effect from solid-state；The mobility enhancing of liquid low-melting alloy, flows from groove
Go out；Slight brush now is done to thin-walled bottom with small-sized hairbrush, i.e., element can be cleaned up from beaker, the liquid in beaker
State low-melting alloy is incompatible with water, using air cooling or injection cold water, treats temperature reduction in beaker, and liquid low-melting alloy is
It is changed into solid-state, realizes the convenient recovery of low-melting alloy；
7) deburring treatment；
8) flexible member is separated with blank parent；Because the thin-walled feature of shell element is rigidly relatively low, to prevent part
Deformation, is separated shell element and blank parent with line cutting technology；
9) flexible member is cleaned.
The step 1) middle making flexible member blank, mother metal line cutting technology is processed the blank cuboid of part
Fritter, its size is 35mm × 20mm × 10mm.
The step 2) middle cleaning flexible member blank, there are more oil stain and impurity, nothing above the blank after wire cutting
Method directly applies to processing, by blank fritter acetone soak, places into and cleaned with ultrasonic wave 15 minutes in absolute ethyl alcohol, you can
Remove surface and oil contaminant and impurity.
The step 3) in milling ditch groove width 3mm, deep 2mm；The cutter for using is the square end mill of a diameter of 3mm.
The step 7) deburring treatment, have the generation of miniature burr in the thin-walled edge feature of processing and top,
Workpiece corner burr is wiped off by microscope and microknife.
The invention provides a kind of Miniature thin-wall flexible member processing method, the processing of Miniature thin-wall flexible member is solved
Problem.Auxiliary supporting material of the present invention is 70 DEG C of low-melting alloy, and the low-melting alloy is Shenzhen gold Yongan
The terne metal or bismuth tin alloy of Industrial Co., Ltd..There was only 10-20um, device in view of the thin-walled feature of processing flexible devices
A length of 5mm, a width of 1mm, a height of 0.7mm, in process easily deform and be broken.The method by low-melting alloy elder generation heap
Thin-walled bottom is placed in, as the Auxiliary support in thin-wall part process, the rigid purpose of thin-walled feature is increased to reach, so that
Prevent from deforming in device thin-walled process and being broken.
In order to verify the feasibility of the method, milling experiment is carried out at five axle micro Process centers (German KERN-2520).Should
Maximum (top) speed is 50000rpm, and X-axis stroke is 250mm, Y-axis stroke 220mm, Z axis stroke 250mm.It is equipped with optical control element,
It is applied to measure micro- milling cutter.The micro- milling cutter applied in experiment is the hard alloy two-edged square end mill of two grooves.
The cutter is manufactured by NS Jin instruments Co., Ltd..Nominal diameter is 0.5mm, sword 0.7mm long, effective sword 2mm long.Using taper shank
The main shaft chuck that 3 millimeters of diameter, its length is 40mm.Two groups of experiments are carried out altogether, and being not provided with Auxiliary support in first group of experiment enters
Row processing, second group of setting Auxiliary support.Two groups of experiments use identical cutting parameter, according to above-mentioned steps 1) -9) carry out
Complete experimental implementation.
The setting of cutting parameter is as shown in the table in processing：
Cutting parameter
After the completion of experiment, the result after processing is observed using the digital microscopy systems VHW-600E of Keyence companies,
Under both the above experimental conditions, comparing result is clearly.When thin-walled feature machining is to 15um, auxiliary branch is constructed without
The flexible element of support has occurred and that local fracture and large deformation at thin-walled feature.But, construct the flexible element of Auxiliary support
Thin-walled feature be not both broken or had not occurred moderate finite deformation.The three-dimensional shaped of thin-walled feature is further measured with the experimental facilities
Looks, observation result equally demonstrates the element for building Auxiliary support relative to the element for being constructed without Auxiliary support, special in thin-walled
There is higher-quality three-dimensional appearance at the place of levying.
Brief description of the drawings
Fig. 1 is minuteness milling Miniature thin-wall flexible member flow process chart；
Fig. 2 a, Fig. 2 b are respectively the front view and top view of Miniature thin-wall flexible member；
Fig. 3 is blank dimension schematic diagram；
Fig. 4 (a)-Fig. 4 (d) is to build Auxiliary support process schematic；
Fig. 5 is Miniature thin-wall flexible member schematic three dimensional views；
Fig. 6 (a), Fig. 6 (b) are thin-walled side patterns under the two groups of experiment conditions observed.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
It is a kind of using low-melting alloy come the method for assist Milling Process Miniature thin-wall flexible member, the method flow
As shown in Figure 1, it is necessary to the flexible member of processing is as shown in Fig. 2 a, Fig. 2 b, element thin-walled feature h design sizes are 15um, specifically
Implement as follows：
(1) flexible member blank is made.Mother metal line cutting technology is processed the blank rectangular piece of part, its chi
Very little size is 35mm × 20mm × 10mm, as shown in figure 3, its size is primarily to coordinate the clamping processing side of lathe
Just.
(2) flexible member blank is cleaned.There is more oil stain and impurity above blank after wire cutting, it is impossible to directly apply
In processing.By blank fritter acetone soak, place into and cleaned with ultrasonic wave 15 minutes in absolute ethyl alcohol, you can remove surface oil
Dirty and impurity.
(3) groove of processing filling auxiliary supporting material.The blank clamping that will be cleaned up is to five axle microfabrication centers
On, knife is ensured to knife precision using laser.Lathe Milling Process blank upper surface is started, and is processed on the basis of upper surface and is filled out
The groove of auxiliary supporting material is filled, such as shown in accompanying drawing 4 (a).Ditch the groove width 3mm, deep 2mm of milling.The cutter for using is a diameter of
The square end mill of 3mm.The groove is used to fill auxiliary supporting material.
(4) selection and filling of auxiliary supporting material.It is micro- in order to show low-melting alloy assist Milling Process
The feasibility of type thin-walled flexible member method, is divided into experiment two groups and is contrasted, and first group of channel bottom is not banked up
Treatment, i.e., do not construct Auxiliary support.Second group of experiment then carries out banking up for auxiliary supporting material in the trench, and selection fusing point is 70
DEG C low-melting alloy as auxiliary supporting material, heating low-melting alloy makes it melt and fill it into step (3) to process
Groove in, such as shown in Fig. 4 (b), in order to ensure the precision of processing, operating process workpiece is not dismantled, and above operating process is in machine
Completed on bed.
(5) minuteness milling processes flexible member thin-walled feature.Hard alloy two-edged tack from a diameter of 0.5mm stands
Milling cutter, the successively milling since blank upper surface, shown in processing very low power such as Fig. 4 (c), in bottom land during milling very low power
The thin-walled feature of remaining 15mm, shown in such as Fig. 4 (c).
(6) clamper for disassembling, removal and recovery auxiliary supporting material.After machining, workpiece is disassembled from fixture.
The workpiece of the second set constructor Auxiliary support is needed to carry out the removal of auxiliary supporting material, and concrete operations are put the workpiece in tweezers
In filling 80 DEG C of beakers of hot water.Low-melting alloy is changed into rapidly liquid under hot water effect from solid-state.Liquid low melting point is closed
The mobility enhancing of gold, flows out from groove.Slight brush now is done to thin-walled bottom with small-sized hairbrush, you can clean workpiece
Totally, removed from beaker shown in clean workpiece such as Fig. 4 (d).Liquid low-melting alloy in beaker is incompatible with water, uses
Air cooling or injection cold water, treat temperature reduction in beaker, and liquid low-melting alloy is to be changed into solid-state, realizes low-melting alloy
It is convenient to reclaim.
(7) deburring treatment.The generation of miniature burr is had in the thin-walled edge feature of processing and top, by microscope
Workpiece corner burr is wiped off with microknife.
(8) flexible member is separated with blank parent.Because the thin-walled feature of shell element is rigidly relatively low, to prevent part
Deformation, is separated shell element and blank parent with line cutting technology.
(9) cleaning of flexible member.Shell element is cleaned up, is dried, you can complete the processing of thin-walled parts, cleaning
After the completion of Miniature thin-wall flexible member three-dimensional appearance it is as shown in Figure 5.
After machining two groups of thin-walled feature such as Fig. 6 of experiment are observed with the big depth of field three-dimensional microscopic systems of VHX-600E
A shown in (), Fig. 6 (b), Fig. 6 (a) is shown first group of workpiece for not constructing Auxiliary support, it is clear that thin-walled feature sides are
Through obvious deformation occurring and being broken, Fig. 6 (b) is the workpiece for constructing Auxiliary support, and its side pattern is very complete, meets and adds
Work requirement.
In order to verify the feasibility of the method, milling experiment is carried out at five axle micro Process centers (German KERN-2520).Should
Maximum (top) speed is 50000rpm, and X-axis stroke is 250mm, Y-axis stroke 220mm, Z axis stroke 250mm.It is equipped with optical control element,
It is applied to measure micro- milling cutter.The micro- milling cutter applied in experiment is the hard alloy two-edged square end mill of two grooves.
The cutter is manufactured by NS Jin instruments Co., Ltd..Nominal diameter is 0.5mm, sword 0.7mm long, effective sword 2mm long.Using taper shank
The main shaft chuck that 3 millimeters of diameter, its length is 40mm.Two groups of experiments are carried out altogether, and being not provided with Auxiliary support in first group of experiment enters
Row processing, second group of setting Auxiliary support.Two groups of experiments use identical cutting parameter, according to above-mentioned steps 1) -9) carry out
Complete experimental implementation.
The setting of cutting parameter is as shown in the table in processing：
Cutting parameter
After the completion of experiment, the result after processing is observed using the digital microscopy systems VHW-600E of Keyence companies,
Under both the above experimental conditions, comparing result is clearly.When thin-walled feature machining is to 15um, auxiliary branch is constructed without
The flexible element of support has occurred and that local fracture and large deformation at thin-walled feature.But, construct the flexible element of Auxiliary support
Thin-walled feature be not both broken or had not occurred moderate finite deformation.The three-dimensional shaped of thin-walled feature is further measured with the experimental facilities
Looks, observation result equally demonstrates the element for building Auxiliary support relative to the element for being constructed without Auxiliary support, special in thin-walled
There is higher-quality three-dimensional appearance at the place of levying.
Although above-mentioned be described with reference to accompanying drawing to specific embodiment of the invention, not to present invention protection model
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need the various modifications made by paying creative work or deformation still within protection scope of the present invention.
Claims (4)
1. a kind of method of utilization low-melting alloy secondary process thin-walled flexible member, it is characterized in that, it is thin what is processed in advance
Auxiliary support is built under wall feature, the material of Auxiliary support is low-melting alloy, specifically includes following steps：
1）Make flexible member blank；
2）Cleaning flexible member blank；
3）The groove of processing filling auxiliary supporting material；The flexible member blank clamping that will be cleaned up is in five axle microfabrications
In the heart, knife is ensured to knife precision using laser；Lathe Milling Process flexible member blank upper surface is started, and is with upper surface
The groove of benchmark processing filling auxiliary supporting material；
4）The selection and filling of auxiliary supporting material；The low-melting alloy that fusing point is 70 DEG C is selected as auxiliary supporting material, plus
Hot low-melting alloy melts it and fills it into step 3）In the groove of middle processing；
5）Minuteness milling processes the thin-walled feature of flexible member；With hard alloy two-edged square end mill, from flexible member hair
Base upper surface starts successively milling, processes very low power, in the thin-walled feature that bottom land residue 15mm is thick during milling very low power；
6）Clamper for disassembling, removal and recovery auxiliary supporting material；After machining, flexible member is disassembled from fixture；
Carry out the removal of auxiliary supporting material, concrete operations are during element is put into tweezers fill 80 DEG C of beakers of hot water；Low melting point
Alloy is changed into rapidly liquid under hot water effect from solid-state；The mobility enhancing of liquid low-melting alloy, flows from groove
Go out；Slight brush now is done to thin-walled bottom with small-sized hairbrush, i.e., element can be cleaned up from beaker, the liquid in beaker
State low-melting alloy is incompatible with water, using air cooling or injection cold water, treats temperature reduction in beaker, and liquid low-melting alloy is
It is changed into solid-state, realizes the convenient recovery of low-melting alloy；
7）Deburring is processed；The step 7）Deburring treatment, processing thin-walled edge feature and top have micro blank
The generation of thorn, wipes workpiece corner burr off by microscope and microknife；
8）Flexible member is separated with blank parent；Because the thin-walled feature of shell element is rigidly relatively low, to prevent the deformation of part,
Shell element and blank parent are separated with line cutting technology；
9）Cleaning flexible member.
2. the method for claim 1, it is characterized in that, the step 1）Middle making flexible member blank, by mother metal line
Cutting technique processes the blank rectangular piece of part, and its size is 35 mm × 20 mm × 10 mm.
3. the method for claim 1, it is characterized in that, the step 2）Middle cleaning flexible member blank, after wire cutting
There is more oil stain and impurity above blank, it is impossible to directly apply to processing, blank fritter acetone soak is placed into anhydrous
Cleaned with ultrasonic wave 15 minutes in ethanol, you can remove surface and oil contaminant and impurity.
4. the method for claim 1, it is characterized in that, the step 3）Ditch the groove width 3mm, deep 2mm of middle milling；Use
Cutter is the square end mill of a diameter of 3mm.
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| CN104439919A (en) | 2015-03-25 |
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