CN110640256A - Automatic adjust welding frock - Google Patents
Automatic adjust welding frock Download PDFInfo
- Publication number
- CN110640256A CN110640256A CN201911070530.2A CN201911070530A CN110640256A CN 110640256 A CN110640256 A CN 110640256A CN 201911070530 A CN201911070530 A CN 201911070530A CN 110640256 A CN110640256 A CN 110640256A
- Authority
- CN
- China
- Prior art keywords
- bottom plate
- support column
- cover plate
- accurate positioning
- automatic adjustment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
- B23K3/087—Soldering or brazing jigs, fixtures or clamping means
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
The invention belongs to the technical field of radio, and discloses an automatic adjusting welding tool, which comprises a bottom plate, a cover plate and pillars, and is characterized in that a plurality of pillars are connected between the bottom plate and the cover plate, the cover plate is provided with accurate positioning holes, accurate positioning nails fastened on the pillars are installed in the accurate positioning holes, and the cover plate is fixedly connected with the bottom plate into a whole through the accurate positioning nails, the pillars, and countersunk screws penetrating through the bottom plate; a plurality of square holes have been seted up to the middle part of apron, square hole pastes the dress position corresponding to the power resistor in printing board, in the use the bottom plate runs through support column and the lap joint in square hole through many, be equipped with printing board, power resistor between support column lower part and the bottom plate, be fixed in the liner on the support column, the support column is located the apron below and has cup jointed the spring, the support column is located the apron top and is equipped with the blend stop. The welding quality and the good heat dissipation performance of the high-power resistor device are ensured.
Description
Technical Field
The invention belongs to the technical field of radio, and particularly relates to an automatic adjusting welding tool.
Background
In newly developed filter products, four high-power radio frequency resistor devices are used, and the packaging characteristics are as follows: the main body material is mainly ceramic, the bottom of the main body is provided with a welding flange, and pins at two ends are silver strips. Because the high-power device is used, the device needs to be ensured to be well radiated when in use, namely, the flange of the device is ensured to be in close contact with a radiator, the heat conduction material is fully filled on the contact surface of the flange and the radiator, the power resistor is welded on a welding disc of a ceramic filter plate, lead-free solder paste is used as the heat conduction filling material, and the mounting is completed by adopting a reflow welding mode. Therefore, the tool needs a downward pressure to act on the resistor all the time to ensure that the flange of the resistor is tightly contacted with the welding plate of the printed board. The following problems need to be considered when adopting tooling welding: 1. because the ceramic device is used, the device cannot be damaged after the tool is used. 2. The melting and thinning of the soldering paste in the soldering process ensures that the downward pressure can always act on four devices. 3. How to avoid the downward pressure on the device body to cause the device to move. 4. How to prevent the damage of the device caused by the temperature conduction of the tool supporting column. 5. Due to the fact that reflow soldering needs to be carried out in a closed reflow furnace for more than ten minutes, the highest temperature can reach about 250 ℃, and therefore the selected tool material is a high-temperature-resistant material (specifically an aluminum alloy material and a polytetrafluoroethylene material).
Disclosure of Invention
The invention aims to solve the problem and provides an automatic adjustment welding tool, which can automatically adjust downward pressure to ensure welding quality and ensure good heat dissipation of a high-power resistor device in the process of welding a resistance flange.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an automatic adjusting welding tool comprises a bottom plate 1, a cover plate 2 and pillars 3, and is characterized in that a plurality of pillars 3 are connected between the bottom plate 1 and the cover plate 2, accurate positioning holes are formed in the cover plate, accurate positioning nails 8 fastened to the pillars 3 are installed in the accurate positioning holes, and the cover plate 2 is fixedly connected with the bottom plate into a whole through the accurate positioning nails, the pillars 3 and countersunk head screws penetrating through the bottom plate; a plurality of square holes have been seted up to the middle part of apron 2, square hole is corresponding to the power resistor of printing board pastes the dress position, in the use bottom plate 1 is connected with apron 2 through many support columns 6 that run through square hole, be equipped with printing board 11, power resistor 10 between 6 lower parts of support column and the bottom plate 1, be fixed in the liner 5 on the support column, the support column is located the apron below and has cup jointed spring 4, support column 6 is located the apron top and is equipped with link stopper 7.
Preferably, the bottom plate 1 is provided with four side corner frames for positioning the printed board, and the bottom of the bottom plate is provided with an opening.
Preferably, the height of the support 3 is set to make the spring in a compressed state, and the support material is made of cold-drawn round steel.
Preferably, the spring 4 is made of carbon steel spring wire.
Preferably, a fixing hole is formed in the center of the liner 5, a groove is formed below the liner, and the liner is made of polytetrafluoroethylene.
Preferably, the cross section of the top of the support column 6 is square, the cross section of the bottom of the support column is rectangular, and the center of the bottom of the support column is provided with an internal thread.
Preferably, the bottom plate 1, the cover plate 2 and the support columns 6 are made of aluminum alloy plates.
Compared with the prior art, the invention has the beneficial effects that:
through actual operation and measurement: the method has the advantages that the requirement of design on the heat dissipation performance of the power resistor device can not be basically met after the welding process is ensured without the tool, the rework rate is 100%, and the damage rate of the reworked device is 20%; after the patent technology is implemented, the flange of the welded power resistor device can be tightly attached to a welding pad of a printed board, the heat dissipation performance of the power resistor device is verified to meet the design requirement after debugging, the yield is 100%, the welding yield is improved, the damage of the device is avoided, the zero damage of the device is realized, the material cost is saved, and the welding quality is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a structural diagram of an automatic adjustment welding tool of the present invention.
Fig. 2 is a schematic diagram of a bottom plate of the automatic adjustment welding tool of the present invention.
FIG. 3 is a front view of a cover plate of the automatic adjustment welding fixture of the present invention.
FIG. 4 is a side view of a cover plate of the self-adjusting welding fixture of the present invention.
Fig. 5 is a perspective view of a cover plate of the automatic adjustment welding tool of the present invention.
FIG. 6 is a front view of a post of the self-adjusting welding fixture of the present invention.
FIG. 7 is a top view of a support post of the self-adjusting welding tool of the present invention.
Fig. 8 is a perspective view of a post of the automatic adjustment welding tool of the present invention.
Fig. 9 is a schematic diagram of a spring of the automatic adjustment welding tool of the present invention.
Fig. 10 is a bottom view of a gasket of the self-adjusting welding fixture of the present invention.
FIG. 11 is a front view of a gasket of the self-adjusting welding fixture of the present invention.
Fig. 12 is a perspective view of a gasket of the automatic adjustment welding tool of the present invention.
Fig. 13 is a bottom view of a support post of the automatic adjustment welding tool of the present invention.
Fig. 14 is a front view of a support post of the automatic adjustment welding tool of the present invention.
Fig. 15 is a top view of a support post of the automatic adjustment welding tool of the present invention.
Fig. 16 is a perspective view of a support post of the automatic adjustment welding tool of the present invention.
FIG. 17 is a left side view of a stop of the automatically adjusting welding fixture of the present invention.
FIG. 18 is a front view of a stop block of the self-adjusting welding fixture of the present invention.
Fig. 19 is a perspective view of a stop block of the automatic adjustment welding tool of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
The embodiment is shown in figures 1-19, and an automatic adjusting welding tool comprises a bottom plate 1, a cover plate 2 and a support column 3, wherein the cover plate is provided with four accurate positioning holes for mounting screws for fixing the cover plate, and the four screws have consistent fastening torque to ensure uniform stress. And the accurate positioning hole is internally provided with an accurate positioning nail 8 fastened on the support column 3, and the accurate positioning nail plays an accurate positioning role for the cross pan head screw 8, so that the square hole of the cover plate is aligned with the four bonding pads on the printed board. The technical hole of the bottom plate 1 is used for preventing the plate from lying to the bottom due to machining tolerance, four supporting columns 3 are connected between the bottom plate 1 and the cover plate 2, the bottom plate 1 is provided with four corner frames for positioning the printed plate, and the bottom of the bottom plate is provided with an opening so as to reduce thermal capacity during welding. The two ends of the strut are provided with internal thread buckles, and the cover plate 2 is fixedly connected with the bottom plate into a whole through the accurate positioning nail, the strut 3 and a countersunk head screw penetrating through the bottom plate; four square holes are formed in the middle of the cover plate 2 and correspond to the power resistor mounting positions of the printed board so as to fix the support columns. In the use process, the bottom plate 1 is connected with the cover plate 2 through a plurality of support columns 6 penetrating through square holes, and the upper part and the lower part of the bottom plate are mainly opened. Be equipped with printing board 11, power resistor 10 between 6 lower parts of support column and the bottom plate 1, be fixed in liner 5 on the support column, the support column is located apron below and has cup jointed spring 4, support column 6 is located the apron top and is equipped with stopper 7 purpose and prevents that the support column from droing when the frock is dismantled. The bottom plate 1, the cover plate 2 and the support columns 6 are made of aluminum alloy plates.
Preferably, the height of the support 3 is set to make the spring in a compressed state, and the support is made of cold-drawn round steel for supporting the cover plate and the bottom plate.
Preferably, the spring 4 is made of carbon steel spring wire, the length is 13.5mm, the pitch is 2.5mm, the pitch is 9.3mm, and the power resistor is guaranteed to be always in a pressure state in the welding process, so that the power resistor flange is guaranteed to be attached to the welding pad.
Preferably, a fixing hole is formed in the center of the liner 5, and the liner is mounted on the support column through a countersunk head screw penetrating through the fixing hole; the lower part of the gasket is provided with a groove which is used for sleeving the resistor to prevent the device from moving after being stressed. The high-temperature resistant material polytetrafluoroethylene is selected to be made, so that the heat of the supporting column is prevented from being conducted to the resistor main body to cause damage.
Preferably, the top section of the support column 6 is square, and the bottom section of the support column is rectangular, so as to fix the spring, and to ensure the installation direction of the gasket. The middle of the bottom of the support column is provided with an internal thread for fixing the gasket.
When the tool is used, the pressure can be automatically adjusted through the spring expansion force according to the melting degree of solder paste, so that the device flange is tightly combined with the printed board; square holes for mounting four support columns are formed in the cover plate, the positions of the square holes correspond to the positions of the power resistors on the printed board, pressure is guaranteed to act on the centers of the power resistors, and flanges of the power resistors are made to be tightly attached to pads of the printed board; the mounting screws can be uniformly fastened by using a calibrated torque screwdriver, so that the stress of the mounting screws is consistent, the stress of the whole printed board is uniform, and the force of the tool acting on the power resistor is ensured to be consistent; the four-side corner frame of the bottom plate is used for fixing the printed board; the heights of the four supporting columns are required to ensure that the spring is in a compressed state and the existence of downward acting force is ensured; the supporting column is used for fixing the spring and the fixed liner; the liner is made of insulating high-temperature-resistant polytetrafluoroethylene materials, plays roles in heat insulation and device damage prevention, and the bottom groove of the liner plays a role in restricting the movement of the power resistor.
The working process is as follows: firstly, placing a ceramic printed board in a groove of a bottom board, then lightly placing a cover board above the printed board, paying attention to the fact that the groove of a gasket is aligned and sleeved on four power resistors, after the gasket is checked to be correct, screwing and uniformly fastening are carried out, fastening torque is 0.7N.m, then placing the gasket in a reflow soldering furnace, heating solder paste to melt and thin, the length of a spring is extended to automatically increase downward pressure, a flange of the power resistor is tightly attached to the printed board, meanwhile, the displacement of the power resistor in the welding process is restrained, and after the welding is finished and cooling, the tool is removed after the gasket is soaked in alcohol.
Through the practice, prove that automatically regulated welding frock maneuverability is strong, easy operation is practical, the flange and the radiator in close contact with of device have obtained the assurance, and the heat conduction material has fully filled the contact surface of flange with the radiator, has avoided the damage of the device that leads to the fact because doing over again, has improved production efficiency, has guaranteed batch production's quality.
The embodiments described above are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (7)
1. An automatic adjusting welding tool comprises a bottom plate (1), a cover plate (2) and pillars (3), and is characterized in that a plurality of pillars (3) are connected between the bottom plate (1) and the cover plate (2), an accurate positioning hole is formed in the cover plate (2), an accurate positioning nail (8) fastened to the pillar (3) is installed in the accurate positioning hole, and the cover plate (2) is fixedly connected with the bottom plate into a whole through the accurate positioning nail (8), the pillar (3) and a countersunk head screw (9) penetrating through the bottom plate; a plurality of square holes have been seted up to the middle part of apron (2), square hole is corresponding to the power resistor of printing board pastes the dress position, in the use bottom plate (1) is connected through many support column (6) and apron (2) that run through square hole, be equipped with printing board (11), power resistor (10) between support column (6) lower part and bottom plate (1), be fixed in liner (5) on the support column, the support column is located the apron below and has cup jointed spring (4), support column (6) are located the apron top and are equipped with washer (7).
2. The automatic adjustment welding tool according to claim 1, characterized in that the bottom plate (1) is provided with four-edge corner frames for positioning the printed board, and the bottom of the bottom plate is provided with an opening.
3. The automatic adjustment welding fixture of claim 1, characterized in that the height of the support (3) is set so that the spring is in a compressed state, which is made of cold drawn round steel.
4. The automatic adjustment welding fixture of claim 1, characterized in that the spring (4) is made of spring wire of carbon steel.
5. The automatic adjustment welding tool according to claim 1, wherein a fixing hole is formed in the center of the liner (5), and a groove made of polytetrafluoroethylene is formed below the liner.
6. The automatic adjustment welding tool according to claim 1, wherein the cross section of the top of the support column (6) is square, the cross section of the bottom of the support column is rectangular, and an internal thread is formed in the center of the bottom of the support column.
7. The automatic adjustment welding tool according to claim 1, wherein the bottom plate (1), the cover plate (2) and the support column (6) are made of aluminum alloy plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911070530.2A CN110640256A (en) | 2019-11-05 | 2019-11-05 | Automatic adjust welding frock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911070530.2A CN110640256A (en) | 2019-11-05 | 2019-11-05 | Automatic adjust welding frock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110640256A true CN110640256A (en) | 2020-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911070530.2A Pending CN110640256A (en) | 2019-11-05 | 2019-11-05 | Automatic adjust welding frock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110640256A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113547183A (en) * | 2021-06-18 | 2021-10-26 | 北京无线电测量研究所 | Welding tool and method for gas phase reflow soldering |
| CN113714593A (en) * | 2021-07-29 | 2021-11-30 | 京信通信技术(广州)有限公司 | Pressing block assembly, welding tool, bending device and welding method |
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| CN109079278A (en) * | 2018-10-10 | 2018-12-25 | 北京遥感设备研究所 | A kind of SMP tap pressure self-adjusting welding tooling |
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2019
- 2019-11-05 CN CN201911070530.2A patent/CN110640256A/en active Pending
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| US6209859B1 (en) * | 1999-10-10 | 2001-04-03 | Henry Chung | Universal reflow fixture |
| CN202103964U (en) * | 2011-05-31 | 2012-01-04 | 昆山元崧电子科技有限公司 | Floating-prevention and inclination-prevention jig for circuit board wave-soldering process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113547183A (en) * | 2021-06-18 | 2021-10-26 | 北京无线电测量研究所 | Welding tool and method for gas phase reflow soldering |
| CN113714593A (en) * | 2021-07-29 | 2021-11-30 | 京信通信技术(广州)有限公司 | Pressing block assembly, welding tool, bending device and welding method |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20200422 Address after: 100176 No. 8 Wenchang Avenue, Beijing economic and Technological Development Zone, Beijing, Daxing District Applicant after: BEIJING NAURA MICROELECTRONICS EQUIPMENT Co.,Ltd. Address before: 101318 No. 26, A District, Tianzhu Road, Tianzhu Airport Industrial Zone, Beijing, Shunyi District Applicant before: Beijing BBEF Science & Technology Co.,Ltd. |
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Application publication date: 20200103 |
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