CN207087101U - A kind of printed board Reflow Soldering warpage preventing universal fixturing - Google Patents
A kind of printed board Reflow Soldering warpage preventing universal fixturing Download PDFInfo
- Publication number
- CN207087101U CN207087101U CN201720969341.9U CN201720969341U CN207087101U CN 207087101 U CN207087101 U CN 207087101U CN 201720969341 U CN201720969341 U CN 201720969341U CN 207087101 U CN207087101 U CN 207087101U
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- China
- Prior art keywords
- printed board
- reflow soldering
- groove
- universal fixturing
- warpage preventing
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Abstract
The utility model discloses a kind of printed board Reflow Soldering warpage preventing universal fixturing.It includes：Chuck body, there is groove in chuck body, there is groove isolation strip between groove and groove；Before printed board reflow soldering, printed board is placed on the universal fixturing, according to the screw mounting hole in printed board, corresponding fixing point is found on described groove, using screw and nut, printed board is fixed on universal fixturing.The utility model can be used for any shape, the printed board reflow soldering of any size thickness, improves universal property, improves fixture service life, it is therefore prevented that printed board warpage due to fixture deformation, save jig Design expense and processing charges.
Description
Technical field
Soldering of printed boards technical field is the utility model is related to, specifically a kind of printed board Reflow Soldering warpage preventing universal clamp
Tool.
Background technology
On microwave radio product, can many times use high frequency Special-purpose printed board, as Rogers 5880,
Rogers4350B etc..Due to being not added with glass measuring fiber in such printed board, cause sheet material softer, and be many times used for micro-
Such printed board thickness of ripple product only has 0.254mm, 0.508mm etc., very thin, simultaneously because practical application needs, printing
Plate is often designed to special-shaped and unconventional square.If its paster directly is crossed into Reflow Soldering, because Reflow Soldering furnace temperature is usual
Up to 240 DEG C or so, easily lead under high temperature print slab warping, deformation is serious, so as to have a strong impact on the welding matter of printed board
Amount.To solve this problem, special fixture is generally made in the industry, printed board is fixed on special fixture, then returned
Fluid welding connects, so as to avoid printing slab warping.
At present, the printed board Reflow Soldering warpage preventing fixture design approach that this area is widely adopted, one is usually designed
With printed board profile identical aluminium sheet, keep mounting hole corresponding with the mounting hole in printed board.For example, Fig. 1 is a routine
Printed board, Fig. 2 are and the matching used backflow welding clamp of conventional printed board in Fig. 1.In reflow soldering, technical staff first makes
Printed board is arranged on aluminum plate fixture with screw, reflow soldering is carried out being put into reflow soldering.Such method, following lack be present
Fall into：
（1）The versatility of fixture is not strong, and often welding a printed board just needs to make a set of corresponding fixture, time-consuming to take
Power, add the management difficulty and processing charges of fixture；
（2）During production, a printed board is often welded, fixture will be dismounted once, and aluminum fixture spiral shell after being dismounted for multiple times
Pit easily stripped thread, causes printed board not compress, and printed board still can warpage after Reflow Soldering.Simultaneously for mounting screw, folder
Tool thickness printing plate has 3~5mm, and when Reflow Soldering, caloric receptivity is larger, and thermal reflow profile is had a great influence, so as to meeting
Seriously affect the welding quality of printed board；
（3）Part printed board is needed due to design, it is impossible to is made regular square, is had special-shaped situation and occur, cause to press from both sides
Tool is also abnormity, and under multiple installation and sintering high temperature effect, aluminum fixture can deform, and cause when Reflow Soldering, print
Making sheet warpage, the access times of fixture are reduced, reduce service life.
Utility model content
The purpose of this utility model is overcome the deficiencies in the prior art, there is provided a kind of printed board Reflow Soldering warpage preventing is general
Fixture, available for any shape, the printed board reflow soldering of any size thickness, universal property is improved, improving fixture makes
With the life-span, it is therefore prevented that printed board warpage due to fixture deformation, saved jig Design expense and processing charges.
The purpose of this utility model is achieved through the following technical solutions：A kind of printed board Reflow Soldering warpage preventing is general
Fixture, including：
Chuck body, there is groove in chuck body, there is groove isolation strip between groove and groove；Printed board reflow soldering it
Before, printed board is placed on the universal fixturing, according to the screw mounting hole in printed board, found on described groove corresponding
Fixing point, using screw and nut, printed board is fixed on universal fixturing.
Described chuck body is rectangle.
The rectangular length-width ratio is 0.7.
The chuck body is aluminium sheet.
Described aluminium plate thickness is 2mm.
Described groove includes two rows, there is intermediate isolating band between the first emissions groove and the second emissions groove.
The groove isolation strip is used as reinforcement, and the intermediate isolating band is used as reinforcement.
Described chuck body has upper isolation strip and lower isolation strip.
The upper isolation strip is used as reinforcement, and the lower isolation strip is used as reinforcement.
The beneficial effects of the utility model are：
（1）Available for any shape, the printed board reflow soldering of any size thickness, universal property is improved.
（2）Corresponding backflow welding clamp is all designed without every printed board again, greatly facilitates the management of backflow welding clamp, section
About jig Design expense and processing charges, while be advantageous to selection of the operating personnel to fixture and use.
（3）Because fixture profile is rectangle, length-width ratio 0.7, regular shape, close to golden ratio, while entirely
Reinforcement it has been covered with fixture, has been not in deformation, it is ensured that printed board flattens compression completely, is not in because fixture deforms
And the phenomenon deformed.
（4）Because jaw thickness only has 2mm, screw mounting groove is covered with whole fixture, the elongated slot can also do radiating groove
Use, the caloric receptivity of fixture when greatly reducing Reflow Soldering, be easy to the amendment of thermal reflow profile, improve the welding matter of product
Amount.
（5）Because fixture does not use screwed hole installation printed board, but screw and nut locking printed board is used, will not
Occur the problem of screwed hole stripped thread causes fixture to be scrapped again, phenomena such as being not in screw hole stripped thread cause printed board institute not tight and
Warpage, reusable more than 500 times, substantially increase the service life of fixture.
（6）Printed board Reflow Soldering warpage preventing fixture is indeformable at high temperature, prevent printed board due to fixture deformation and warpage.
Brief description of the drawings
Fig. 1 is a kind of conventional printing harden structure.
Fig. 2 is and a kind of special matching used Reflow Soldering aluminum plate fixture of conventional printing harden structure in Fig. 1.
Fig. 3 is structure chart of the present utility model.
Fig. 4 is the structure chart of the utility model embodiment one.
In figure, isolation strip under 1-, 2- grooves isolation strip, 3- intermediate isolating bands, 4- grooves, the upper isolation strip of 5-.
Embodiment
The technical solution of the utility model, but the scope of protection of the utility model are described in further detail below in conjunction with the accompanying drawings
It is not limited to as described below.
【Embodiment one】
As shown in figure 3, a kind of printed board Reflow Soldering warpage preventing universal fixturing, including：
Chuck body, there is groove 4 in chuck body, there is groove isolation strip between groove 4 and groove 4；In printed board reflow soldering
Before, printed board is placed on universal fixturing, according to the screw mounting hole in printed board, groove 4 on find corresponding fixation
Point, using screw and nut, printed board is fixed on universal fixturing.
Chuck body be rectangle.
Rectangular length-width ratio is 0.7.
Chuck body is aluminium sheet.
Aluminium plate thickness be 2mm.
Groove include two rows, have intermediate isolating band between the first emissions groove and the second emissions groove.
Groove isolation strip 2 is used as reinforcement, and intermediate isolating band 3 is used as reinforcement.
Chuck body have upper isolation strip 5 and lower isolation strip 1.
Upper isolation strip is used as reinforcement, and lower isolation strip is used as reinforcement.
As shown in figure 4, in embodiment one of the present utility model, become in itself to solve the general sex chromosome mosaicism and fixture of fixture
Shape causes to print slab warping and reuses problem, and according to the products characteristics of my company, all radio frequency printing board sizes typically exist
Between 10mm~210mm, each printed board is fixed on product using M2 screw.Therefore fixture of the present utility model presses following think of
Road is designed：Fixture can be preferably designed for 230 × 170 × 2 mm first（Length × width x thickness）Rectangle aluminium sheet.Then
Aluminium sheet is uniformly milled out into 2.2 × 70mm groove as printed board fixing groove every 2.8mm again.The groove is divided into two rows, in
Between isolated using the wide reinforcements of 10mm, while slot and be also set to 10mm with the distance of upper and lower edges of boards, the edges of boards wide 10mm
Also serve as reinforcement.The structure chart of fixture is as shown in Figure 3.
According to the products characteristics of my company, whether great or small, how special-shaped contour structures are, due to fixture for all printing board sizes
Upper densely covered two 70 × 2.2mm of row elongated slot, before printed board reflow soldering, can directly by printed board as on fixture,
According to the screw mounting hole in printed board, corresponding fixing point is found on fixture, using M2 screw and nut, by printed board
It is locked on fixture.Thus solves the general sex chromosome mosaicism of fixture.
Due to using the aluminium sheet of 2mm thickness in fixture, profile is 170 × 230mm rectangle, and length-width ratio is closely yellow
Golden cut-off rule ratio, while can make in the isolation strip that X-direction has 10mm between the wide long sides of upper and lower two 10mm and two platoon leader's grooves
For reinforcement, there is 2.8mm isolation strip between each elongated slot of Y direction as reinforcement, fixture will not also go out at high temperature
Now deform.It is also smaller using the aluminium sheet caloric receptivity after 2mm, it is easy to correct thermal reflow profile.So as to solve under high temperature
The problem of fixture deformation causes to print slab warping and the big temperature curve that recepts the caloric is difficult to correct and influence welding quality.
Because newly-designed fixture does not use the screw mounting hole of engagement thread, but the screw directly used adds nut
Mounting means fixed printed board, avoid screw repeatedly dismounting cause screwed hole stripped thread after printed board can not compress and stick up
The problem of bent.Experiment shows that fixture may be reused more than 500 times completely.In actual production, those skilled in the art are only
Need to be locked at it on fixture of the present utility model with screw and nut before printed board Reflow Soldering can complete production task.
Because the utility model has longer service life and stronger versatility, processing charges and design cost are greatlyd save,
The management of fixture is facilitated, while improves the welding quality of printed board.
Described above is only preferred embodiment of the present utility model, it should be understood that the utility model is not limited to herein
Disclosed form, the exclusion to other embodiment is not to be taken as, and can be used for various other combinations, modification and environment, and
It can be modified in contemplated scope described herein by the technology or knowledge of above-mentioned teaching or association area.And this area
The change and change that personnel are carried out do not depart from spirit and scope of the present utility model, then all should be in right appended by the utility model
It is required that protection domain in.
Claims (9)
- A kind of 1. printed board Reflow Soldering warpage preventing universal fixturing, it is characterised in that including：Chuck body, there is groove in chuck body, there is groove isolation strip between groove and groove；, will before printed board reflow soldering Printed board is placed on the universal fixturing, and according to the screw mounting hole in printed board, corresponding fixation is found on described groove Point, using screw and nut, printed board is fixed on universal fixturing.
- A kind of 2. printed board Reflow Soldering warpage preventing universal fixturing according to claim 1, it is characterised in that：Described fixture Body is rectangle.
- A kind of 3. printed board Reflow Soldering warpage preventing universal fixturing according to claim 2, it is characterised in that：The rectangle Length-width ratio be 0.7.
- A kind of 4. printed board Reflow Soldering warpage preventing universal fixturing according to claim any one of 1-3, it is characterised in that：Folder Tool body is aluminium sheet.
- A kind of 5. printed board Reflow Soldering warpage preventing universal fixturing according to claim 4, it is characterised in that：Described aluminium sheet Thickness is 2mm.
- A kind of 6. printed board Reflow Soldering warpage preventing universal fixturing according to claim 1, it is characterised in that：Described groove bag Two rows are included, there is intermediate isolating band between the first emissions groove and the second emissions groove.
- A kind of 7. printed board Reflow Soldering warpage preventing universal fixturing according to claim 1 or 6, it is characterised in that：Groove is isolated Band is used as reinforcement, and intermediate isolating band is used as reinforcement.
- A kind of 8. printed board Reflow Soldering warpage preventing universal fixturing according to claim 1, it is characterised in that：Described fixture Body has upper isolation strip and lower isolation strip.
- A kind of 9. printed board Reflow Soldering warpage preventing universal fixturing according to claim 8, it is characterised in that：Use upper isolation strip Make reinforcement, lower isolation strip is used as reinforcement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720969341.9U CN207087101U (en) | 2017-08-04 | 2017-08-04 | A kind of printed board Reflow Soldering warpage preventing universal fixturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720969341.9U CN207087101U (en) | 2017-08-04 | 2017-08-04 | A kind of printed board Reflow Soldering warpage preventing universal fixturing |
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| Publication Number | Publication Date |
|---|---|
| CN207087101U true CN207087101U (en) | 2018-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720969341.9U Active CN207087101U (en) | 2017-08-04 | 2017-08-04 | A kind of printed board Reflow Soldering warpage preventing universal fixturing |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113301726A (en) * | 2021-05-25 | 2021-08-24 | 中国电子科技集团公司第二十九研究所 | Design method and welding method of printed board assembly based on vertical interconnection among boards |
-
2017
- 2017-08-04 CN CN201720969341.9U patent/CN207087101U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113301726A (en) * | 2021-05-25 | 2021-08-24 | 中国电子科技集团公司第二十九研究所 | Design method and welding method of printed board assembly based on vertical interconnection among boards |
| CN113301726B (en) * | 2021-05-25 | 2022-03-08 | 中国电子科技集团公司第二十九研究所 | Design method and welding method of printed board assembly based on vertical interconnection among boards |
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