CN105322270A - Manufacturing method of cover board of cavity filter - Google Patents
Manufacturing method of cover board of cavity filter Download PDFInfo
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- CN105322270A CN105322270A CN201510785132.4A CN201510785132A CN105322270A CN 105322270 A CN105322270 A CN 105322270A CN 201510785132 A CN201510785132 A CN 201510785132A CN 105322270 A CN105322270 A CN 105322270A
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- stretching
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- tuning
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Abstract
The invention discloses a manufacturing method of a cover board of a cavity filter. The method comprises the following steps: selecting materials, carrying out positioning and processing a tuning threaded hole; stretching a board through a hydraulic stretching machine, stretching a copper surface of the cover board to an aluminum surface in the stretching process, and arranging a plurality of stations on a stretching die according to the thickness of the board and the requirements of materials; quickly stretching the board with the determined tuning threaded hole position on the cover board to the initial station after stretching is started, stretching the board from fast to slow for a plurality of times, and stretching the board to the final station by the hydraulic stretching machine; enabling the stretching machine to begin to slowly return to the normal position, reversely jacking a processing head of the stretching machine quickly in the return process for a plurality of times, and enabling the stretching machine to return to the normal position after reverse jacking is ended; and processing a lug boss which is integrated with the cover board in the position of the tuning threaded hole by the hydraulic stretching machine, wherein the middle part of the lug boss is hollow. The stretching problem is handled by an oil press; and compared with a conventional punching mode employing a punching machine, the manufacturing method is higher in yield and better in manufacturing effect.
Description
Technical field
The present invention relates to signal transacting field, particularly relate to a kind of manufacture method of cavity filter cover board.
Background technology
At present, the signal transacting of cavity body filter has been come by the tuning Self-locking screw on filter cover board usually, the problem of tuning screw process is the problem of signal intermodulation in general, specifically refers to two different frequency signals, superposes and the signal of the new frequency of generation in a certain system.
The sheet material that current common filter lid board fabrication method adopts usually is pure copper material or the copper-plated metal material of surface electrical, cost is higher, what process mostly is the tuned window needing supporting tuning swivel nut, and add and mostly adopt man-hour the mode of punching press to process tuned window, impact style easily damages cover plate on the one hand, defect rate is higher, the tuned window processed on the other hand also needs to install tuning swivel nut in addition, tuning swivel nut adopts welding, press, the mode such as gluing is fixed on tuned window, the installation of tuning swivel nut not only needs cost of labor and processing cost, simultaneously, this tuning swivel nut installed additional in addition on tuned window is also unstable, just easily produce through after a period of time and loosen, and the also also out-of-flatness of the interface of tuned window and tuning swivel nut, the tuning effect that final impact is actual.
Summary of the invention
The present invention aims to provide a kind of manufacture method of cavity filter cover board.
For solving the problems of the technologies described above, by the following technical solutions, a kind of manufacture method of cavity filter cover board, comprises the following steps in the present invention:
Step one: selection, chooses suitable sheet material when considering cost and performance, and sheet material adopts aluminium, if the size of sheet material is improper, carries out suitable cutting to sheet material;
Step 2: location, determines the position in tuning screwed hole and cover screw hole according to the actual conditions of filter cavity;
Step 3: processing cover screw hole, behind the position determining cover screw hole, uses lathe to stamp out cover screw hole;
Step 4: process tuning screwed hole, add and adopt man-hour oil pressure stretching-machine to stretch to sheet material, the punch that stretching sheet material uses is placed on the hydraulic cylinder of hydraulic press, die is placed on the base of hydraulic press, be provided with multiple station according to the thickness of sheet material and the drawing die that needs of material, stretch start rear first by the sheet material Rapid stretching of the tuning screwed hole position that cover plate determines to just determining station;
Step 5: just determine station place described, oil pressure stretching-machine exerts a force perpendicular to lid surface direction, according to the thickness of sheet material and material, multi-drawing processing is carried out to cover plate, stretching-machine sets different draw speeds according to the station on drawing die, from just determining station to last station, the speed stretched from fast to slow, stretching-machine at this point from fast to slow by the plate stretch of tuning screwed hole position that cover plate determines to corresponding station, until sheet material be stretched to last station after oil pressure stretching-machine stop force;
Step 6: oil pressure stretching-machine is by after plate stretch to last station, stretching-machine starts to get back to original position lentamente, the processing head of stretching-machine is anti-secondary at most fast in the process of return, repeatedly instead push up after-drawing machine and get back to original position, now oil pressure stretching-machine process in tuning screwed hole position one with cover plate one boss, the mid portion hollow of boss;
Step 7: use lathe to process screw thread in the inside of boss and inside, cover screw hole, the diameter of the swivel nut that boss internal thread holes is formed is greater than the diameter of the inner undressed part of boss;
Step 8: boss inner undressed go out the part of screw thread annular elastic sheet metal is installed, the diameter of sheet metal is less than the diameter of filter tuner Self-locking screw.
As preferably, the thickness of described sheet material is 0.8-3.5mm.
As preferably, described cyclic spring sheet metal is cyclic spring copper sheet.
As preferably, the height of the boss that oil pressure stretching-machine processes is 1-20mm.
As preferably, the swivel nut that the screwed hole that step 7 processes in boss inside is formed is suitable for the tuning Self-locking screw of M5-M10 specification.
As preferably, oil pressure stretching-machine is from just determining station carries out at least 3 stretch process to last station to cover plate.
As preferably, oil pressure stretching-machine realizes draw speed from fast to slow by cylinder.
As preferably, hydraulic press is provided with hydraulic circuit, the anti-top of hydraulic circuit restrained stretching machine in return process.
Relative to traditional filter lid board fabrication method, the whole aluminium of the present invention is used as the material of sheet material, because aluminium is relatively cheap on the one hand, use aluminium to manufacture cover plate and greatly can save material cost, the quality of aluminium is softer on the other hand, processing is got up easily, also save processing cost, consider the actual demand that present filter is tuning, the specification of tuning Self-locking screw is M5-M10 at present, and accordingly, the aluminium extensibility adopted due to cover plate is better, the thickness of cover plate only need control at 0.8-3.5mm, cover plate is light and do not affect result of use, save material cost further, the height of boss also can control at 1-20mm, be enough to the instructions for use meeting Self-locking screw, the present invention uses boss to replace the combination of traditional tuned window and tuning swivel nut, only need stretch to sheet material because process boss, use lathe just automatically can complete the processing of tuning screwed hole, operation need not be overlapped again additionally by stamping out tuned window and fixing tuning swivel nut two, this tuning screwed hole is by the materials processing of sheet material out, the present invention also can not waste material while saving operation, and integrated boss is very firm, tuning effect can not be affected, and the present invention adopts oil pressure stretching-machine to carry out stretch process to process tuning screwed hole to cover plate, according to the thickness of sheet material and material, multi-drawing processing is carried out to cover plate, stretching-machine sets different draw speeds according to the station on drawing die, from just determining station to last station, the speed stretched from fast to slow, stretching-machine at this point from fast to slow by the plate stretch of tuning screwed hole position that cover plate determines to corresponding station, until sheet material is stretched to oil pressure stretching-machine after last station stop force, relative to original punch forming used, plate stretch is extremely just determined station by hydraulic press that the present invention uses fast, controlling hydraulic press propelling sheet material from fast to slow to corresponding station with cylinder subsequently can make sheet material adapt to the pulling force of hydraulic press applying at leisure, the waste product problem that there will not be punch forming to cause, the stretch process of the preferred syllogic of the present invention has then taken into account man-hour and rate of finished products, respond well, hydraulic press finally also can repeatedly instead fast push up simultaneously, this operation can eliminate the stress that after cover plate is stretched, metal produces, guarantee the quality of the tuned window processed, the tuning screwed hole not eliminating metal stresses can produce slight deformation, the tuning effect of final impact, boss inside of the present invention is also provided with along its axis direction the tuned window connected with screwed hole, this tuned window is relative to the cavity of screwed hole closer to filter, tuned window inside is provided with cyclic spring sheet metal, the diameter of sheet metal is less than the diameter of filter tuner Self-locking screw, electric capacity is formed between the inwall of annular sheet metal and tuning screw, make effect cover plate being introduced capacity plate antenna, reduce the current density of tuning screw and cover plate binding site, reduce the inter-modulated signal level because tuning screw and cover plate loose contact produce, improve the intermodulation first-pass yield of cavity body filter, and adopt flexible sheet metal to be depart from the front end of screw when screwed hole enters tuning porose area to squeeze elastic sheet metal downwards, sheet metal is because the effect of elastic force inwardly extrudes and can pin Self-locking screw better, consider the factor of cost and efficiency, preferably adopt cyclic spring copper sheet further, because cost is lower on the one hand for copper, there is good elasticity on the other hand.
Accompanying drawing explanation
Fig. 1 is flow chart of the present invention;
Fig. 2 is the schematic diagram of the product that the present invention manufactures;
Fig. 3 is that the present invention manufactures a product the schematic diagram of boss.
In figure: 1, sheet material; 2, boss; 3, screwed hole; 4, tuned window; 5, cover screw hole; 6, cyclic spring sheet metal.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
Describe the manufacture method according to a kind of cavity filter cover board of the embodiment of the present invention referring to Fig. 1 to Fig. 2, comprise the following steps:
Step one: selection, choose suitable sheet material 1 when considering cost and performance, sheet material 1 adopts aluminium, if the size of sheet material 1 is improper, carries out suitable cutting to sheet material 1;
Step 2: location, determines the position in tuning screwed hole and cover screw hole 5 according to the actual conditions of filter cavity;
Step 3: processing cover screw hole 5, behind the position determining cover screw hole 5, uses lathe to stamp out cover screw hole 5;
Step 4: process tuning screwed hole, add and adopt man-hour oil pressure stretching-machine to stretch to sheet material 1, stretch one of cover plate copper towards the one side of aluminium during stretching, the punch that stretching sheet material uses is placed on the hydraulic cylinder of hydraulic press, die is placed on the base of hydraulic press, be provided with multiple station according to the thickness of sheet material and the drawing die that needs of material, stretch start rear first by the sheet material Rapid stretching of the tuning screwed hole position that cover plate determines to just determining station;
Step 5: just determine station place described, oil pressure stretching-machine exerts a force perpendicular to lid surface direction, according to the thickness of sheet material and material, multi-drawing processing is carried out to cover plate, stretching-machine sets different draw speeds according to the station on drawing die, from just determining station to last station, the speed stretched from fast to slow, stretching-machine at this point from fast to slow by the plate stretch of tuning screwed hole position that cover plate determines to corresponding station, until sheet material be stretched to last station after oil pressure stretching-machine stop force;
Step 6: oil pressure stretching-machine is by after plate stretch to last station, stretching-machine starts to get back to original position lentamente, the processing head of stretching-machine is anti-secondary at most fast in the process of return, repeatedly instead push up after-drawing machine and get back to original position, now oil pressure stretching-machine process in tuning screwed hole position one with cover plate one boss 2, the mid portion hollow of boss 2;
Step 7: use lathe to process screw thread in the inside of boss 2 and inside, cover screw hole 5, the diameter of the swivel nut that boss 2 internal thread holes 3 is formed is greater than the diameter of the inner undressed part of boss 2;
Step 8: boss 2 inner undressed go out the part of screw thread annular elastic sheet metal 6 is installed, the diameter of sheet metal 6 is less than the diameter of filter tuner Self-locking screw.
As preferably, the thickness of described sheet material 1 is 0.8-3.5mm.
As preferably, described cyclic spring sheet metal 6 is cyclic spring copper sheet.
As preferably, the height of the boss 2 that oil pressure stretching-machine processes is 1-20mm.
As preferably, the swivel nut that the screwed hole that step 7 processes in boss 2 inside is formed is suitable for the tuning Self-locking screw of M5-M10 specification.
As preferably, oil pressure stretching-machine is from just determining station carries out at least 3 stretch process to last station to cover plate.
As preferably, oil pressure stretching-machine realizes draw speed from fast to slow by cylinder.
As preferably, hydraulic press is provided with hydraulic circuit, the anti-top of hydraulic circuit restrained stretching machine in return process.
Relative to traditional filter lid board fabrication method, the whole aluminium of the present invention is used as the material of sheet material, because aluminium is relatively cheap on the one hand, use aluminium to manufacture cover plate and greatly can save material cost, the quality of aluminium is softer on the other hand, processing is got up easily, also save processing cost, consider the actual demand that present filter is tuning, the specification of tuning Self-locking screw is M5-M10 at present, and accordingly, the aluminium extensibility adopted due to cover plate is better, the thickness of cover plate only need control at 0.8-3.5mm, cover plate is light and do not affect result of use, save material cost further, the height of boss also can control at 1-20mm, be enough to the instructions for use meeting Self-locking screw, the present invention uses boss to replace the combination of traditional tuned window and tuning swivel nut, only need stretch to sheet material because process boss, use lathe just automatically can complete the processing of tuning screwed hole, operation need not be overlapped again additionally by stamping out tuned window and fixing tuning swivel nut two, this tuning screwed hole is by the materials processing of sheet material out, the present invention also can not waste material while saving operation, and integrated boss is very firm, tuning effect can not be affected, and the present invention adopts oil pressure stretching-machine to carry out stretch process to process tuning screwed hole to cover plate, according to the thickness of sheet material and material, multi-drawing processing is carried out to cover plate, stretching-machine sets different draw speeds according to the station on drawing die, from just determining station to last station, the speed stretched from fast to slow, stretching-machine at this point from fast to slow by the plate stretch of tuning screwed hole position that cover plate determines to corresponding station, until sheet material is stretched to oil pressure stretching-machine after last station stop force, relative to original punch forming used, plate stretch is extremely just determined station by hydraulic press that the present invention uses fast, controlling hydraulic press propelling sheet material from fast to slow to corresponding station with cylinder subsequently can make sheet material adapt to the pulling force of hydraulic press applying at leisure, the waste product problem that there will not be punch forming to cause, the stretch process of the preferred syllogic of the present invention has then taken into account man-hour and rate of finished products, respond well, hydraulic press finally also can repeatedly instead fast push up simultaneously, this operation can eliminate the stress that after cover plate is stretched, metal produces, guarantee the quality of the tuned window processed, the tuning screwed hole not eliminating metal stresses can produce slight deformation, the tuning effect of final impact, boss inside of the present invention is also provided with along its axis direction the tuned window connected with screwed hole, this tuned window is relative to the cavity of screwed hole closer to filter, tuned window inside is provided with cyclic spring sheet metal, the diameter of sheet metal is less than the diameter of filter tuner Self-locking screw, electric capacity is formed between the inwall of annular sheet metal and tuning screw, make effect cover plate being introduced capacity plate antenna, reduce the current density of tuning screw and cover plate binding site, reduce the inter-modulated signal level because tuning screw and cover plate loose contact produce, improve the intermodulation first-pass yield of cavity body filter, and adopt flexible sheet metal to be depart from the front end of screw when screwed hole enters tuning porose area to squeeze elastic sheet metal downwards, sheet metal is because the effect of elastic force inwardly extrudes and can pin Self-locking screw better, consider the factor of cost and efficiency, preferably adopt cyclic spring copper sheet further, because cost is lower on the one hand for copper, there is good elasticity on the other hand.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (8)
1. a manufacture method for cavity filter cover board, is characterized in that, comprises the following steps:
Step one: selection, chooses suitable sheet material when considering cost and performance, and sheet material adopts aluminium, if the size of sheet material is improper, carries out suitable cutting to sheet material;
Step 2: location, determines the position in tuning screwed hole and cover screw hole according to the actual conditions of filter cavity;
Step 3: processing cover screw hole, behind the position determining cover screw hole, uses lathe to stamp out cover screw hole;
Step 4: process tuning screwed hole, add and adopt man-hour oil pressure stretching-machine to stretch to sheet material, the punch that stretching sheet material uses is placed on the hydraulic cylinder of hydraulic press, die is placed on the base of hydraulic press, be provided with multiple station according to the thickness of sheet material and the drawing die that needs of material, stretch start rear first by the sheet material Rapid stretching of the tuning screwed hole position that cover plate determines to just determining station;
Step 5: just determine station place described, oil pressure stretching-machine exerts a force perpendicular to lid surface direction, according to the thickness of sheet material and material, multi-drawing processing is carried out to cover plate, stretching-machine sets different draw speeds according to the station on drawing die, from just determining station to last station, the speed stretched from fast to slow, stretching-machine at this point from fast to slow by the plate stretch of tuning screwed hole position that cover plate determines to corresponding station, until sheet material be stretched to last station after oil pressure stretching-machine stop force;
Step 6: oil pressure stretching-machine is by after plate stretch to last station, stretching-machine starts to get back to original position lentamente, the processing head of stretching-machine is anti-secondary at most fast in the process of return, repeatedly instead push up after-drawing machine and get back to original position, now oil pressure stretching-machine process in tuning screwed hole position one with cover plate one boss, the mid portion hollow of boss;
Step 7: use lathe to process screw thread in the inside of boss and inside, cover screw hole;
Step 8: boss inner undressed go out the part of screw thread annular elastic sheet metal is installed, the diameter of sheet metal is less than the diameter of filter tuner Self-locking screw.
2. manufacture method according to claim 1, is characterized in that, the thickness of the sheet material that step one is selected is 0.8-3.5mm.
3. manufacture method according to claim 1, is characterized in that, described cyclic spring sheet metal is cyclic spring copper sheet.
4. manufacture method according to claim 1, is characterized in that, the height of the boss that oil pressure stretching-machine processes is 1-20mm.
5. manufacture method according to claim 1, is characterized in that, the swivel nut that the screwed hole that step 7 processes in boss inside is formed is suitable for the tuning Self-locking screw of M5-M10 specification.
6. manufacture method according to claim 1, is characterized in that, oil pressure stretching-machine is from just determining station carries out at least 3 stretch process to last station to cover plate.
7. manufacture method according to claim 1, is characterized in that, oil pressure stretching-machine realizes draw speed from fast to slow by cylinder.
8. manufacture method according to claim 1, is characterized in that, hydraulic press is provided with hydraulic circuit, the anti-top of hydraulic circuit restrained stretching machine in return process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510785132.4A CN105322270B (en) | 2015-11-17 | 2015-11-17 | A kind of manufacturing method of cavity filter cover board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510785132.4A CN105322270B (en) | 2015-11-17 | 2015-11-17 | A kind of manufacturing method of cavity filter cover board |
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| Publication Number | Publication Date |
|---|---|
| CN105322270A true CN105322270A (en) | 2016-02-10 |
| CN105322270B CN105322270B (en) | 2018-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510785132.4A Active CN105322270B (en) | 2015-11-17 | 2015-11-17 | A kind of manufacturing method of cavity filter cover board |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916895A (en) * | 2010-08-20 | 2010-12-15 | 深圳市大富科技股份有限公司 | Cavity filter and manufacturing method thereof |
| KR20110013956A (en) * | 2009-08-04 | 2011-02-10 | 주식회사 알림테크놀러지 | Method for combining cover of radio frequency filter and radio frequency filter produced by the method |
| US20140292446A1 (en) * | 2013-03-29 | 2014-10-02 | Hon Hai Precision Industry Co., Ltd. | Cavity filter |
| CN204632892U (en) * | 2014-12-31 | 2015-09-09 | 深圳市大富科技股份有限公司 | Cavity body filter, duplexer and radio frequency remote equipment |
-
2015
- 2015-11-17 CN CN201510785132.4A patent/CN105322270B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110013956A (en) * | 2009-08-04 | 2011-02-10 | 주식회사 알림테크놀러지 | Method for combining cover of radio frequency filter and radio frequency filter produced by the method |
| CN101916895A (en) * | 2010-08-20 | 2010-12-15 | 深圳市大富科技股份有限公司 | Cavity filter and manufacturing method thereof |
| US20140292446A1 (en) * | 2013-03-29 | 2014-10-02 | Hon Hai Precision Industry Co., Ltd. | Cavity filter |
| CN204632892U (en) * | 2014-12-31 | 2015-09-09 | 深圳市大富科技股份有限公司 | Cavity body filter, duplexer and radio frequency remote equipment |
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| Publication number | Publication date |
|---|---|
| CN105322270B (en) | 2018-05-22 |
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