CN109848652A - A kind of processing method of titanium alloy encapsulating housing - Google Patents
A kind of processing method of titanium alloy encapsulating housing Download PDFInfo
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- CN109848652A CN109848652A CN201910134043.1A CN201910134043A CN109848652A CN 109848652 A CN109848652 A CN 109848652A CN 201910134043 A CN201910134043 A CN 201910134043A CN 109848652 A CN109848652 A CN 109848652A
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Abstract
The invention discloses a kind of processing methods of titanium alloy encapsulating housing, including milling shape and the reserved machining allowance of shape, obtain shell semi-finished product；Rough milling is carried out to shell semi-finished product, obtains the semi-finished product for rough milling inner cavity, and interior intracavitary reserved machining allowance；The semi-finished product for rough milling inner cavity are heat-treated；The first side of shell after heat treatment mills out array step cutting pattern hole；The second side of shell after heat treatment mills out rectangular stepped hole, and the second side is opposite with first side；Housing cavity and shape finish-milling are processed, the processing of titanium alloy encapsulating housing is completed.It is heat-treated after titanium alloy shell is rough milled inner cavity, final finish-milling shell guarantees the machining accuracy and surface quality of shell, is suitble to mass processing, reduces processing cost, promotes the passing rate of processing of titanium alloy encapsulating housing.
Description
Technical field
The invention belongs to microwave device encapsulation fields, and in particular to a kind of processing method of titanium alloy encapsulating housing.
Background technique
T/R component is a kind of important microwave device, in high integration, light-weighted military electronic devices development
Under, the structure of T/R component encapsulating housing becomes complicated (such as thin wall structure, small structure).In order to avoid T/R component internal device
Signal interference between part, encapsulating housing inner cavity is provided with metal muscle for being electromagnetically shielded, while being reserved in the side of shell
Relevant step cutting pattern hole, rectangular stepped hole are for the relevant low-and high-frequency connector of subsequent assembling, to transmit electromagnetic signal.?
Under high integration, light-weighted development, the structure size required precision of encapsulating housing is more and more tighter, and portion size precision is wanted
It asks in 0.03mm, in order to guarantee the attachment of device inside circuit, within the planarity requirements 0.05mm of shell.Therefore, encapsulating shell
The machining accuracy of body is directly related with the assembling capacity of T/R component and subsequent service performance.Encapsulating housing is mainly from low-density material
The selection of material is thinning structure two angles of design to match in electronic component high integration, light-weighted development trend.
TC4 titanium alloy is as a kind of light material, density 4.5g/cm3, only the 58% of steel, intensity are steel
3.5 times, therefore, the density low-intensity of titanium alloy is high, particularly suitable as the material of main part of T/R component encapsulating housing, with reality
Being thinning of the complicated cavity of existing encapsulating housing, lightweight.
But TC4 titanium alloy is a kind of typical difficult-to-machine material, the low (thermal conductivity 15.2W/ (m of the thermal coefficient of titanium alloy
K)), processing hardening is serious, chemical activity is high, causes titanic alloy machining difficult, the surface of shell shaped is of poor quality.It is sealing
It fills in the tradition machinery processing of shell, shell is directly to carry out the molding of milling Precision Machining using milling cutter, then passes through subsequent inspection
Test the qualified encapsulating housing for filtering out and meeting dimensional tolerance and appearance, but titanium alloy and steel, the conventional encapsulants such as can to cut down different,
It is easy viscous knife according to the machining of conventional encapsulating housing, while (material when big cutting output is processed is carried out to titanium alloy raw material
Removal rate be greater than 80%), a large amount of machining stress of titanium alloy encapsulating housing internal residual shaped, stress release will be led
Housing distortion warpage is caused, so that the surface quality of shell processing is poor and machining deformation is serious, dimensional accuracy is difficult to ensure, encapsulation
The passing rate of processing of shell is low, to constrain the mass processing and application of titanium alloy encapsulating housing.
Summary of the invention
Based on this, the present invention provides a kind of processing methods of titanium alloy encapsulating housing, comprising the following steps: milling shape,
Inner cavity, heat treatment, milling step cutting pattern hole, the rectangular stepped hole of milling, finish-milling shell are rough milled, the processing of titanium alloy encapsulating housing is completed.
It is heat-treated after titanium alloy shell is rough milled inner cavity, final finish-milling shell guarantees the machining accuracy and surface quality of shell, is suitble to criticize
Quantization processing, reduces processing cost, promotes the passing rate of processing of titanium alloy encapsulating housing.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of processing method of titanium alloy encapsulating housing, comprising the following steps:
A, mill shape: milling carried out to housing top surface, bottom surface and surrounding, shape reserve machining allowance, obtain shell partly at
Product；
B, it rough mills inner cavity: rough milling being carried out to the shell semi-finished product, obtains the semi-finished product for rough milling inner cavity, and interior intracavitary
Reserved machining allowance；Intracavitary reserved machining allowance inside is convenient for subsequent Precision Machining, preferred machining allowance in the present invention
For the machining allowance of 0.4~0.8mm, convenient for controlling the dimensional accuracy of finished product.
C, it is heat-treated: the semi-finished product for rough milling inner cavity is heat-treated；
D, mill step cutting pattern hole: the first side of shell after heat treatment mills out array step cutting pattern hole；
E, mill rectangular stepped hole: the second side of shell after heat treatment mills out rectangular stepped hole, described second side
Face is opposite with first side；
F, finish-milling shell: processing to by step e treated housing cavity and shape finish-milling, completes titanium alloy encapsulating housing
Processing.
Further, in step a and step b, the milling cutter of use is φ 2mm or φ 4mm alloy coat milling cutter, is added
Work parameter is 3000~5000rpm of revolving speed, 200~400mm/min of feeding speed.
Further, interior intracavitary reserved machining allowance is in shape reserved machining allowance and step b in step a
0.4~0.8mm.After sharp processing and interior intracavitary reserved machining allowance, it is convenient for subsequent Precision Machining, it is excellent in the present invention
Selecting machining allowance is 0.4~0.8mm, consequently facilitating the dimensional accuracy of control finished product.
Further, in step c, the specific steps of the heat treatment are as follows: the semi-finished product for rough milling inner cavity are placed in chain
In formula continuous tunnel furnace, made annealing treatment under the protection of the mixed atmosphere of inert gas and hydrogen.Hot place is carried out after rough milling inner cavity
Reason, what is generated when on the one hand can effectively remove because rough milling inner cavity remains in the internal stress of inner cavity, so that the dimensional structure of shell
It becomes stable；On the other hand, when rough milling inner cavity, surface of shell produces work hardening layer, can be hard by processing by heat treatment
Change layer softening, is convenient for subsequent processing quality control.
Preferably, the volume fraction of hydrogen is 5~15% in the mixed atmosphere.
Preferably, the annealing are as follows: from room temperature to 700 DEG C~800 DEG C, be cooled to after keeping the temperature 0.5~1.5h
Room temperature.The parameter of the capacity distribution of gas in mixed atmosphere and heat treatment has been carried out preferably, so that rough milling inner cavity in the present invention
The internal stress of semi-finished product be released effectively, and eliminate the work hardening layer of semi-finished product shell skin, stablize simultaneously
The microcosmic material structure and macrostructure size of titanium alloy shell.
Further, in step d and step e, the cutter that milling uses is φ 1 or φ 2mm alloy coat milling cutter, processing
Parameter is 7000~10000rpm of revolving speed, 100~200mm/min of feeding speed.
Preferably, the cutter and machined parameters that the finish-milling processing in step f uses are the same as step d.
Preferably, it is TC4 titanium alloy that the titanium alloy encapsulating housing, which uses,.
Compared with prior art, the invention has the following advantages:
The present invention carries out contour milling to shell first and rough mills inner cavity, completes most of Milling Process amount, while outside
The machining allowance that 0.4~0.8mm is reserved in shape and inner cavity exists since enclosure interior major part titanium alloy material is milled removing
Biggish remnants machining stress, stress release lead to housing distortion, and size is not easy to guarantee, therefore, after the present invention rough mills inner cavity
Shell be heat-treated, effectively removal generates when rough milling inner cavity before finish-milling shell residual stress, so that shell
Dimensional structure becomes stable, while heat treatment can also soften the surface work hardening layer generated when rough milling inner cavity, convenient for subsequent
The control of processing quality.Titanium alloy conventional uses existing vacuum annealing furnace when carrying out vacuum heat treatment to equipment vacuum degree, material
Expect that the techniques such as cleanliness require harsh and are batch production, in comparison, it is raw that chain type continuous tunnel furnace belongs to high-volume continous way
Equipment is produced, technique requires relative loose, and ensure that titanium alloy shell high-volume Continuous maching, meets high-volume and rolls life
It produces.The present invention carries out hot place as protective atmosphere using the mixed atmosphere of inert gas and hydrogen in chain type continuous tunnel furnace simultaneously
Reason, the oxidation for avoiding titanium alloy shell simultaneously, the hydrogen in protective atmosphere can react to form phase with titanium alloy surface layer
The compound of pass makes full use of hydrogen deduced plasticity to improve the machining property on titanium alloy surface layer, processes convenient for subsequent finish-milling.
The machining allowance of 0.4~0.8mm is reserved when after heat treatment, due to rough milling inner cavity, reserved machining allowance is super
It crosses when titanium alloy is heat-treated and generates surface layer reaction layer thickness, according to the size that final finished needs can be carried out to shell accurate add
Work, and since reserved machining allowance is smaller, it can be very good the dimensional accuracy for guaranteeing titanium alloy encapsulating housing and surface processing
Quality, dimension control is within 0.03mm, flatness controls within 0.05mm, therefore, using processing of the invention
Method is suitble to mass high-precision to process, and qualification rate is high.
Detailed description of the invention
Fig. 1 is the flow diagram of titanium alloy encapsulating housing processing method in the present invention；
Fig. 2 is the shell semi-finished product in the present invention；
Fig. 3 is the shell rough milled behind inner cavity in the present invention；
Fig. 4 is the shell that step cutting pattern hole is milled out in the present invention；
Fig. 5 is the shell that rectangular stepped hole is milled out in the present invention；
Fig. 6 is the titanium alloy encapsulating housing in the present invention.
In figure: 1. shell semi-finished product, 2. inner cavities, 3. muscles, 11. first sides, 12. second sides, 110. arrays are round
Stepped hole, 120. rectangular stepped holes.
Specific embodiment
To facilitate the understanding of the present invention, below in conjunction with specific embodiments to invention is more fully described.But
It is that the invention can be realized in many different forms, however it is not limited to embodiments described herein.On the contrary, providing
The purpose of these embodiments is to make to make the present disclosure more fully understandable.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
As shown in Figure 1, the processing method that the titanium in the present invention closes encapsulating housing, comprising the following steps: be followed successively by milling shell
External shape rough mills housing cavity, is heat-treated, milling out step cutting pattern hole, milling out rectangular stepped hole, last finish-milling shell, complete
At the processing of titanium alloy encapsulating housing.
In a preferred embodiment of the invention, the material of titanium alloy shell is TC4 titanium alloy, the processing of encapsulating housing
Method the following steps are included:
A, it mills shape: using φ 2mm or φ 4mm alloy coat milling cutter, 3000~5000rpm of setting speed, feeding speed
200~400mm/min carries out milling to housing top surface, bottom surface and surrounding, and shape is reserved the machining allowance of 0.4~0.8mm, obtained
To shell semi-finished product 1 as shown in Figure 2；
B, inner cavity is rough milled: using φ 2mm or φ 4mm alloy coat milling cutter, 3000~5000rpm of setting speed, feed speed
200~400mm/min is spent, rough milling is carried out to shell semi-finished product 1, as shown in figure 3, forming inner cavity in shell semi-finished product 1
2, and needed to form muscle 3 in inner cavity 2 according to product, the semi-finished product for rough milling inner cavity are obtained, and reserved 0.4 in inner cavity 2~
The machining allowance of 0.8mm；
C, it is heat-treated: the semi-finished product for rough milling inner cavity being placed in chain type continuous tunnel furnace, in the gaseous mixture of inert gas and hydrogen
It is made annealing treatment under atmosphere protection, the volume fraction of hydrogen is 5~15% in the mixed atmosphere.In chain type continuous tunnel furnace, slightly
The semi-finished product of inner cavity are milled from room temperature to 700 DEG C~800 DEG C, are cooled to room temperature after keeping the temperature 0.5~1.5h；
D, it mills step cutting pattern hole: using φ 1 or φ 2mm alloy coat milling cutter, 7000~10000rpm of setting speed, feed
100~200mm/min of speed, the first side 11 of shell after heat treatment mills out array step cutting pattern hole 110, such as Fig. 4
It is shown；
E, it mills rectangular stepped hole: using φ 1 or φ 2mm alloy coat milling cutter, 7000~10000rpm of setting speed, feed
100~200mm/min of speed, the second side 12 of shell after heat treatment mill out rectangular stepped hole 120, as shown in figure 5,
And the second side 12 is opposite with first side 11.
F, φ 1 or φ 2mm alloy coat milling cutter, 7000~10000rpm of setting speed, feeding speed finish-milling shell: are used
100~200mm/min is processed to by step e treated 2 finish-milling of housing cavity, completes the processing of titanium alloy encapsulating housing, most
Finished product is as shown in Figure 6.
The titanium alloy encapsulating housing being processed into above-mentioned better embodiment, dimensional accuracy is within 0.03mm, plane
Degree is within 0.05mm, and qualification rate is high, machined surface quality, can meet mass processing.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (9)
1. a kind of processing method of titanium alloy encapsulating housing, which comprises the following steps:
A, it mills shape: milling being carried out to housing top surface, bottom surface and surrounding, shape reserves machining allowance, obtains shell semi-finished product；
B, it rough mills inner cavity: rough milling is carried out to the shell semi-finished product, obtain the semi-finished product for rough milling inner cavity, and interior intracavitary reserved
Machining allowance；
C, it is heat-treated: the semi-finished product for rough milling inner cavity is heat-treated；
D, mill step cutting pattern hole: the first side of shell after heat treatment mills out array step cutting pattern hole；
E, mill rectangular stepped hole: the second side of shell after heat treatment mills out rectangular stepped hole, the second side with
First side is opposite；
F, finish-milling shell: processing to by step e treated housing cavity and shape finish-milling, complete titanium alloy encapsulating housing plus
Work.
2. processing method as described in claim 1, which is characterized in that in step a and step b, the milling cutter of use is
φ 2mm or φ 4mm alloy coat milling cutter, machined parameters are 3000~5000rpm of revolving speed, 200~400mm/ of feeding speed
min。
3. processing method as described in claim 1, which is characterized in that in step a in shape reserved machining allowance and step b
Interior intracavitary reserved machining allowance is 0.4~0.8mm.
4. processing method as described in claim 1, which is characterized in that in step c, the specific steps of the heat treatment are as follows: will
The semi-finished product for rough milling inner cavity are placed in chain type continuous tunnel furnace, are annealed under the protection of the mixed atmosphere of inert gas and hydrogen
Processing.
5. processing method as claimed in claim 4, which is characterized in that in the mixed atmosphere volume fraction of hydrogen be 5~
15%.
6. processing method as claimed in claim 4, which is characterized in that the annealing are as follows: from room temperature to 700 DEG C~
800 DEG C, room temperature is cooled to after keeping the temperature 0.5~1.5h.
7. processing method as described in claim 1, which is characterized in that in step d and step e, the cutter that milling uses is
φ 1 or φ 2mm alloy coat milling cutter, machined parameters are 7000~10000rpm of revolving speed, 100~200mm/min of feeding speed.
8. processing method as claimed in claim 7, which is characterized in that the cutter and processing that the finish-milling processing in step f uses
The rapid d of parameter synchronization.
9. processing method as described in any one of claims 1 to 8, which is characterized in that the titanium alloy encapsulating housing used
For TC4 titanium alloy.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110653578A (en) * | 2019-10-28 | 2020-01-07 | 宝鸡市隆庆金属材料制品厂 | Titanium alloy shell, wheel rail detection instrument and processing method of titanium alloy shell |
| CN110814397A (en) * | 2019-12-03 | 2020-02-21 | 珠海市润星泰电器有限公司 | Step hole machining method and machining device |
| CN114823928A (en) * | 2022-04-26 | 2022-07-29 | 中国电子科技集团公司第四十三研究所 | Photoelectric packaging shell and manufacturing process thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1176668A (en) * | 1995-12-26 | 1998-03-18 | 新日本制铁株式会社 | Primary cooling method in continuously annealing steel strip |
| CN101234467A (en) * | 2008-03-04 | 2008-08-06 | 常州市鼎亨机电设备有限公司 | QS-4 elastic body processing technique for sensor |
| US20090083980A1 (en) * | 2005-09-09 | 2009-04-02 | Vdo Automotive Ag | Cooling Body for Electronics Housing |
| CN102605994A (en) * | 2012-03-26 | 2012-07-25 | 镇江泰源电器科技有限公司 | Electromagnetic lock shell for high-voltage switching device and manufacturing method of electromagnetic lock shell |
| CN103753124A (en) * | 2013-12-19 | 2014-04-30 | 湖北三江航天红阳机电有限公司 | Machining method for large cast titanium alloy diamond-shaped cabin shell |
| CN104923839A (en) * | 2015-06-25 | 2015-09-23 | 合肥圣达电子科技实业公司 | Processing method of aluminum-silicon shell |
| CN106862867A (en) * | 2017-02-28 | 2017-06-20 | 厦门宏发精密机械有限公司 | A kind of processing method of tool fixture |
| CN107627075A (en) * | 2016-07-19 | 2018-01-26 | 成都源云机械有限公司 | A kind of heavy-duty coal mining machine towing tank body processing technology |
-
2019
- 2019-02-22 CN CN201910134043.1A patent/CN109848652A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1176668A (en) * | 1995-12-26 | 1998-03-18 | 新日本制铁株式会社 | Primary cooling method in continuously annealing steel strip |
| US20090083980A1 (en) * | 2005-09-09 | 2009-04-02 | Vdo Automotive Ag | Cooling Body for Electronics Housing |
| CN101234467A (en) * | 2008-03-04 | 2008-08-06 | 常州市鼎亨机电设备有限公司 | QS-4 elastic body processing technique for sensor |
| CN102605994A (en) * | 2012-03-26 | 2012-07-25 | 镇江泰源电器科技有限公司 | Electromagnetic lock shell for high-voltage switching device and manufacturing method of electromagnetic lock shell |
| CN103753124A (en) * | 2013-12-19 | 2014-04-30 | 湖北三江航天红阳机电有限公司 | Machining method for large cast titanium alloy diamond-shaped cabin shell |
| CN104923839A (en) * | 2015-06-25 | 2015-09-23 | 合肥圣达电子科技实业公司 | Processing method of aluminum-silicon shell |
| CN107627075A (en) * | 2016-07-19 | 2018-01-26 | 成都源云机械有限公司 | A kind of heavy-duty coal mining machine towing tank body processing technology |
| CN106862867A (en) * | 2017-02-28 | 2017-06-20 | 厦门宏发精密机械有限公司 | A kind of processing method of tool fixture |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110653578A (en) * | 2019-10-28 | 2020-01-07 | 宝鸡市隆庆金属材料制品厂 | Titanium alloy shell, wheel rail detection instrument and processing method of titanium alloy shell |
| CN110814397A (en) * | 2019-12-03 | 2020-02-21 | 珠海市润星泰电器有限公司 | Step hole machining method and machining device |
| CN114823928A (en) * | 2022-04-26 | 2022-07-29 | 中国电子科技集团公司第四十三研究所 | Photoelectric packaging shell and manufacturing process thereof |
| CN114823928B (en) * | 2022-04-26 | 2024-02-20 | 中国电子科技集团公司第四十三研究所 | Photoelectric packaging shell and manufacturing process thereof |
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Application publication date: 20190607 |