CN111006832A - Universal clamp for circuit board of vibration test board and use method thereof - Google Patents
Universal clamp for circuit board of vibration test board and use method thereof Download PDFInfo
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- CN111006832A CN111006832A CN201911395145.5A CN201911395145A CN111006832A CN 111006832 A CN111006832 A CN 111006832A CN 201911395145 A CN201911395145 A CN 201911395145A CN 111006832 A CN111006832 A CN 111006832A
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- strip
- movable
- circuit board
- pressing block
- vibration test
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/027—Specimen mounting arrangements, e.g. table head adapters
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- Mounting Of Printed Circuit Boards And The Like (AREA)
Abstract
The invention discloses a universal clamp for a circuit board for a vibration test bench and a use method thereof, wherein the universal clamp comprises two limiting strips which are arranged at the edge of a bottom plate of the vibration test bench in parallel from front to back, at least two movable strips with adjustable left and right positions are vertically connected between the two limiting strips, a plurality of pressing blocks which can rotate around the axes of the pressing screws are symmetrically connected on the adjacent movable strips through the pressing screws, the cross sections of the movable strips at the positions corresponding to the upper parts and the lower parts of the pressing blocks are of a convex structure, the height of a convex part on each movable strip is smaller than the thickness of the circuit board to be tested, the length of the long edge of each pressing block is larger than the width of the convex part on each movable strip, the length of the short edge of each pressing block is not larger than the width of the convex part on each movable. The clamping device can be used for vibration test clamping of circuit boards with various sizes, and improves the universality; the quick assembly of the circuit board can be realized, the production efficiency is greatly improved, and the labor cost is reduced.
Description
Technical Field
The invention relates to the technical field of circuit board vibration testing, in particular to a universal clamp for a circuit board for a vibration test board and a using method thereof.
Background
The circuit board is widely applied in various industries, and is widely applied in the fields of traditional industrial control, novel electronic products, automobile military industry and the like. The circuit board realizes the electrical connection among all components in the circuit, replaces complex wiring, reduces the wiring workload in the traditional mode, and all the components are welded on one substrate, thereby reducing the volume of the whole machine and lowering the product cost. Because the components and parts size is less, arrange densely, be difficult for device inspection one by one, but the components and parts probably have pin rosin joint during welding, need carry out vibration test to the circuit board, screen the rosin joint product. Meanwhile, when the circuit board is used in many fields, severe working conditions such as large vibration and impact exist, the actual working conditions need to be simulated for vibration and impact testing, the circuit board also needs to be subjected to vibration testing, and the limit of the circuit board is tested.
Because the size range of the circuit board is wide, and the shapes and the sizes are different, when the circuit board is detected every time, a specific clamp needs to be customized for each circuit board, and the circuit board can be fixed on the vibration test board. Therefore, the detection period is prolonged, the efficiency is reduced, and the cost is increased.
In view of the above, in order to overcome the defects in the prior art, it is an urgent technical problem to be solved in the art to provide a novel universal fixture for a circuit board for a vibration test stand.
Disclosure of Invention
The invention aims to provide a universal clamp for a circuit board for a vibration test board, which has good universality and convenient use and a use method thereof aiming at the defects of the prior art.
The invention provides a universal clamp for a circuit board for a vibration test platform, which comprises two limiting strips which are arranged at the edge of a bottom plate of the vibration test platform in parallel from front to back, wherein at least two movable strips with adjustable left and right positions are vertically connected between the two limiting strips, a plurality of pressing blocks which can rotate around the axes of the pressing screws are symmetrically connected on the adjacent movable strips through the pressing screws, the cross sections of the movable strips at the positions corresponding to the upper parts and the lower parts of the pressing blocks are of a convex structure, the height of a convex part on each movable strip is smaller than the thickness of the circuit board to be tested, the length of the long edge of each pressing block is larger than the width of the convex part on each movable strip, the length of the short edge of each pressing block is not larger than the width of the convex part on each movable strip.
The limiting strips are provided with longitudinal strip holes, and the two ends of the movable strip penetrate through the longitudinal strip holes through locking screws and are arranged between the two limiting strips in an adjustable left-right position.
The whole limiting strip is n-shaped, the whole movable strip is n-shaped, the longitudinal long strip hole is formed in the horizontal section of the limiting strip, and two ends of the movable strip are connected to the bottom of the horizontal section of the limiting strip through locking screws.
In order to facilitate the screwing by hands without tools, the locking screw is a knurled screw with a high head.
In order to facilitate the screwdriving without a tool, the compression screw is a knurled screw with a high head.
In order to avoid the electric leakage phenomenon after the circuit board is pressed and realize the power-on test function, the cross section of the movable strip at the position corresponding to the upper part and the lower part of the pressing block is of an integrated convex structure, and the pressing block and the movable strip are both made of insulating materials.
In order to avoid electric leakage after the circuit board is pressed and realize the power-on test function, the bottoms of the movable strips at the positions corresponding to the upper part and the lower part of the pressing block are connected with a detachable lower limiting block, the cross section of the lower limiting block is U-shaped, the lower limiting block is wrapped on the movable strips to form a combined convex structure, and the pressing block and the lower limiting block are both made of insulating materials.
In order to facilitate the quick positioning and installation of the lower limiting block, a plurality of grooves are arranged on the bottom surface and the side surface of the movable strip at the position corresponding to the upper part and the lower part of the pressing block, convex edges are arranged on the lower limiting block at the position corresponding to each groove, and the lower limiting block is clamped at the bottom of the movable strip through the matching of the convex edges and the grooves.
The invention also provides a using method of the universal clamp for the circuit board for the vibration test platform, which comprises the following steps:
s1, adjusting the distance between the adjacent movable strips according to the front and back side length of the circuit board to be tested, so that the left and right sides of the circuit board to be tested are positioned right above the bottom surfaces of the convex parts of the adjacent movable strips;
s2, loosening the compression screw, and rotating the pressing block to enable the short side of the pressing block to be perpendicular to the axis of the movable strip;
s3, placing the circuit board to be tested on the bottom surface of the adjacent movable strip convex part;
s4, rotating the pressing block to enable the long edge of the pressing block to be perpendicular to the axis of the movable strip;
s5, screwing the compression screw, and moving the pressing block downwards along with the compression screw to clamp the circuit board to be tested on the movable strip;
and S6, loosening the compression screw after the vibration test is finished, rotating the press block to enable the short side of the press block to be perpendicular to the axis of the movable strip, and taking out the circuit board.
According to the invention, the movable strips are arranged in a left-right position adjustable mode, and the plurality of pressing blocks are arranged on each movable strip, so that when the test fixture is used, circuit boards with different sizes can be installed and fixed only by adjusting the distance between the movable strips according to the width of a circuit board to be tested, thus the test fixture can realize the independent test of a large single circuit board and the simultaneous test of a plurality of small circuit boards, and has strong universality; the pressing block is designed into shapes with different side lengths, the pressing screw does not need to be completely unscrewed, and the circuit board can be put in or taken out only by rotating the pressing block until the short side of the pressing block is vertical to the axis of the movable strip, so that the mounting and dismounting are faster. The clamping device can be used for vibration test clamping of circuit boards with various sizes, and improves the universality; the processing of a plurality of clamps with different specifications can be avoided, the production time of the clamps is saved, the construction period is shortened, the manufacturing materials are saved, and the management cost is reduced; the operation is convenient, the fast installation of the circuit board can be realized, the production efficiency is greatly improved, and the labor cost is reduced.
Drawings
FIG. 1 is a schematic axial view of a first embodiment of the present invention.
Fig. 2 is a schematic sectional view at a-a in fig. 1.
Fig. 3 is a schematic view of an enlarged cross-sectional structure at B-B in fig. 1.
Fig. 4 is an enlarged partial sectional view of the structure at C-C in fig. 1.
FIG. 5 is a schematic diagram of a second axial structure in a use state of the present invention.
The labels shown in the figures and the corresponding component names are:
1. a limiting strip; 11. a longitudinal elongated hole; 12. mounting holes;
2. a movable bar; 21. a screw mounting hole; 22. a groove;
3. a compression screw;
4. briquetting;
5. locking the screw;
6. a lower limiting block; 61. a convex edge;
7. a vibration test platform bottom plate;
8. and the circuit board to be tested.
Detailed Description
Example one
As can be seen from fig. 1 to 5, the universal circuit board clamp for the vibration test platform of the invention is arranged on a bottom plate 7 of the vibration test platform and comprises two limiting strips 1, two movable strips 2, six compression screws 3, six pressing blocks 4, four locking screws 5 and six lower limiting blocks 6,
the whole limiting strip 1 is in an inverted U shape, a longitudinal long hole 11 penetrating through the upper surface and the lower surface is milled on the horizontal section in the middle of the limiting strip 1, mounting holes 12 penetrating through the upper surface and the lower surface are milled on the vertical sections at the two ends of the limiting strip 1, the two limiting strips 1 penetrate through the mounting holes 12 through screws and are respectively and horizontally mounted at the front edge and the rear edge of the bottom plate 7 of the vibration test bench, and the two limiting strips 1 are arranged on the bottom plate 7 of the vibration test bench in a front-back parallel mode;
the movable strip 2 is integrally in a shape like a Chinese character 'ji', screw mounting holes 21 penetrating through the upper surface and the lower surface of the movable strip 2 are milled on the horizontal sections at the two ends of the bottom of the movable strip 2, the two movable strips 2 are vertically arranged between the two limiting strips 1, the horizontal sections at the two ends of the bottom of each movable strip 2 are respectively inserted into the lower part of the horizontal section in the middle of the two limiting strips 1, the movable strip 2 is arranged between the two limiting strips 1 in a sliding manner by adjusting the left and right positions of the horizontal ends at the two ends of the bottom of the movable strip 2, the longitudinal strip hole 11 is vertically communicated with the screw mounting holes 21, and the four locking screws 5 penetrate through the longitudinal strip hole 11 to be in threaded connection with the corresponding screw mounting holes 21 so as;
each pressing block 4 is of a cuboid structure and made of an insulating material, six pressing blocks 4 are symmetrically arranged on the two movable strips 2 in a left-right mode in a pairwise mode, the pressing blocks 4 are sleeved outside the compression screws 3 in a one-to-one mode and can rotate around the axes of the compression screws 3, the bottoms of the compression screws 3 are in threaded connection with the movable strips 2, and the pressing blocks 4 are rotatably installed on the movable strips 2 through the compression screws 3;
the cross section of each lower limiting block 6 is U-shaped and made of insulating material, each lower limiting block 6 is detachably mounted at the bottom of the movable bar 2 below each pressing block 4 one by one through a screw, the lower limiting block 6 covers the bottom surface and two side surfaces of the movable bar 2, the cross section formed by the combination of the lower limiting block 6 and the movable bar 2 is of a convex structure, the distance from the top surface of the lower limiting block 6 to the top surface of the movable bar 2 is the height of a convex part formed by the combination, and the distance is smaller than the thickness of the circuit board 8 to be tested; the width of the top surface of the movable strip 2 is the width of the combined bulge, the length of the long side of the pressing block 4 is greater than the width of the bulge, and the length of the short side of the pressing block 4 is not greater than the width of the bulge; the top surface of the lower limiting block 6 is the bottom surface of the combined convex part;
the circuit board 8 to be tested is placed on the bottom surface of the protruding part of the adjacent movable strip 2, the compression screw 3 rotates and moves downwards to drive the pressing block 4 to press downwards, and the part of the pressing block 4 extending out of the protruding part clamps the circuit board to be tested between the adjacent movable strips 2.
As can be seen from fig. 3 and 4, the bottom and the side of the movable bar 2 corresponding to the upper and lower parts of the pressing block 4 are provided with a plurality of grooves 22, the lower limiting block 6 corresponding to each groove 22 is provided with a convex edge 61 which is matched with the lower limiting block, and the lower limiting block 6 is inserted into the corresponding groove 22 through the convex edge 61 and clamped at the bottom of the movable bar 2 in a front-back positioning manner.
In the invention, the compression screw 3 and the locking screw 5 both adopt GB834 knurled high-head screws.
In the invention, the number of the movable strips 2 and the number of the pressing blocks 4 on a single movable strip 2 can be installed according to actual conditions.
When the invention is used for testing a plurality of small circuit boards with the same specification, the movable strip 2 can be combined for use, and the maximum number of the circuit boards which can be simultaneously tested is as follows:
F＝(a-1)×b，
wherein: a is the number of the movable strips 2; b is the number of the pressing blocks 4 on the single movable strip 2. As shown in fig. 5, the maximum number of circuit boards that can be simultaneously tested is F ═ 5-1 × 3 ═ 12.
Example two
The difference between the present embodiment and the first embodiment is that the cross section of the movable strip 2 at the upper and lower corresponding positions of the pressing block 4 is of an integral convex structure, and the pressing block 4 and the movable strip 2 are both made of insulating materials.
The use method of the universal circuit board clamp for the vibration test board comprises the following steps:
s1, loosening the locking screws 5, and adjusting the distance between the adjacent movable strips 2 according to the front and back side length of the circuit board to be tested to enable the left and right sides of the circuit board to be tested to be positioned right above the bottom surfaces of the convex parts of the adjacent movable strips 2; screwing the locking screw 5 to fix the left and right positions of the limiting strip 2;
s2, loosening the compression screw 3, and rotating the pressing block 4 to enable the short side of the pressing block 4 to be perpendicular to the axis of the movable strip 2;
s3, placing the circuit board to be tested on the bottom surface of the convex part of the adjacent movable strip 2;
s4, rotating the pressing blocks 4 on the left side and the right side of the circuit board to be tested, and enabling the long sides of the pressing blocks 4 to be perpendicular to the axis of the movable strip 2;
s5, tightly screwing the compression screws 3 on the left side and the right side of the circuit board to be tested, and allowing the pressing block 4 to move downwards along with the compression screws 3 to clamp the circuit board to be tested on the adjacent movable strips 2;
and S6, loosening the compression screw 3 after the vibration test is finished, and rotating the pressing block 4 to enable the short side of the pressing block 4 to be perpendicular to the axis of the movable strip 2, so that the circuit board can be taken out.
Claims (9)
1. The utility model provides a circuit board universal fixturing for vibration test platform which characterized in that: parallel arrangement is in two spacing (1) of vibration test platform bottom plate edge around including, position adjustable activity strip (2) about two at least perpendicular connections have, there are a plurality of briquetting (4) that can wind the rotatory in housing screw axle center through housing screw (3) symmetric connection on adjacent activity strip, be type structure for protruding with the activity strip cross section of briquetting upper and lower correspondence department, the height of bulge is less than the circuit board thickness of waiting to measure on the activity strip, the length on the long limit of briquetting is greater than the width of bulge on the activity strip, the length of briquetting minor face is not more than the width of bulge on the activity strip, the briquetting that stretches out activity strip bulge is driven by housing screw and is moved down the circuit board that awaits measuring and clamp on the bottom surface of adjacent activity strip bulge.
2. The universal fixture for circuit boards of vibration test benches as claimed in claim 1, wherein: the limiting strips are provided with longitudinal strip holes (11), and the two ends of the movable strip penetrate through the longitudinal strip holes through locking screws (5) and are arranged between the two limiting strips in an adjustable left-right position.
3. The universal fixture for circuit boards of claim 2, wherein: the whole limiting strip is n-shaped, the whole movable strip is n-shaped, the longitudinal long strip hole is formed in the horizontal section of the limiting strip, and two ends of the movable strip are connected to the bottom of the horizontal section of the limiting strip through locking screws.
4. The universal fixture for circuit boards of claim 2, wherein: the locking screw is a knurled screw with a high head.
5. The universal fixture for circuit boards of vibration test benches as claimed in claim 1, wherein: the compression screw is a knurled screw with a high head.
6. The universal fixture for circuit boards of vibration test benches as claimed in claim 1, wherein: the cross section of the movable strip at the position corresponding to the upper part and the lower part of the pressing block is of an integrated convex structure, and the pressing block and the movable strip are both made of insulating materials.
7. The universal fixture for circuit boards of vibration test benches as claimed in claim 1, wherein: the bottom of the movable strip corresponding to the upper part and the lower part of the pressing block is connected with a detachable lower limiting block (6), the cross section of the lower limiting block is U-shaped, the lower limiting block is wrapped on the movable strip to form a combined convex structure, and the pressing block and the lower limiting block are both made of insulating materials.
8. The universal fixture for circuit boards of claim 7, wherein: the bottom surface and the side surface of the movable strip corresponding to the upper part and the lower part of the pressing block are provided with a plurality of grooves (22), the lower limiting block corresponding to each groove is provided with a convex edge (61), and the lower limiting block is clamped at the bottom of the movable strip through the matching of the convex edge and the groove.
9. A method for using the universal fixture for circuit boards of any one of the claims 1 to 8, comprising the following steps:
s1, adjusting the distance between the adjacent movable strips (2) according to the front and back side length of the circuit board to be tested, so that the left and right sides of the circuit board to be tested are positioned right above the bottom surfaces of the convex parts of the adjacent movable strips;
s2, loosening the compression screw (3) and rotating the pressing block (4) to enable the short side of the pressing block to be perpendicular to the axis of the movable strip;
s3, placing the circuit board to be tested on the bottom surface of the adjacent movable strip convex part;
s4, rotating the pressing block to enable the long edge of the pressing block to be perpendicular to the axis of the movable strip;
s5, screwing the compression screw, and moving the pressing block downwards along with the compression screw to clamp the circuit board to be tested on the movable strip;
and S6, loosening the compression screw after the vibration test is finished, rotating the press block to enable the short side of the press block to be perpendicular to the axis of the movable strip, and taking out the circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911395145.5A CN111006832A (en) | 2019-12-30 | 2019-12-30 | Universal clamp for circuit board of vibration test board and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911395145.5A CN111006832A (en) | 2019-12-30 | 2019-12-30 | Universal clamp for circuit board of vibration test board and use method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111006832A true CN111006832A (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911395145.5A Pending CN111006832A (en) | 2019-12-30 | 2019-12-30 | Universal clamp for circuit board of vibration test board and use method thereof |
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| CN (1) | CN111006832A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686529A (en) * | 2021-10-26 | 2021-11-23 | 山东润龙轴承有限公司 | Acrylic plate vibration measurement system and device based on ultrasonic waves |
-
2019
- 2019-12-30 CN CN201911395145.5A patent/CN111006832A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686529A (en) * | 2021-10-26 | 2021-11-23 | 山东润龙轴承有限公司 | Acrylic plate vibration measurement system and device based on ultrasonic waves |
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