CN218546360U - Draw test auxiliary structure - Google Patents
Draw test auxiliary structure Download PDFInfo
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- CN218546360U CN218546360U CN202222340640.XU CN202222340640U CN218546360U CN 218546360 U CN218546360 U CN 218546360U CN 202222340640 U CN202222340640 U CN 202222340640U CN 218546360 U CN218546360 U CN 218546360U
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- pull
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Abstract
The utility model relates to a drawing test auxiliary structure, which comprises a welding needle and a connecting component, wherein one end of the welding needle is connected with a fixed part, and the other end of the welding needle is used for welding with a pad to be tested; the fixed part is in a ring shape or a ring shape with a gap, and the circle center of the fixed part is positioned in the extending direction of the welding needle; the connecting assembly comprises a chain and a connecting part connected with the chain, the chain is used for being connected with a pull rod of the drawing test machine, the connecting part is in a circular ring shape or a circular ring shape with a gap, and the circle center of the connecting part is positioned in the extending direction of the chain; in a test state, the chain is connected with a pull rod of the drawing test machine, and one of the fixing part and the connecting part penetrates into the middle space of the other one. The utility model provides a draw test auxiliary structure, both atresss and chain pull the direction unanimously in the test after fixed part and connecting portion cup joint and realize pulling perpendicularly, realize the peel strength test of vertical direction, and can not harm the welding needle.
Description
Technical Field
The utility model relates to a draw test auxiliary structure.
Background
Along with the development of PCBA products, the products gradually move towards lightweight, small in area, light in weight and thin in thickness, and what come with it is that Pad is littleer and littleer, and the circuit leads to various components and parts Pad area of contact to reduce. The series of changes all cause the bonding force of the contact position of the component on the PCBA to become a test, and the decrease of the Pad area causes the small bonding area of the Pad and the material and the poor peeling strength.
In order to measure the peeling strength of the Pad and the material more accurately, the conventional tests are all drop tests or roller tests, but the tests for small-sized products become unreliable and cannot be quantified. The existing common drawing test mainly aims at testing whether a product is extruded and falls off or not to separate from a circuit board to cause a functional problem in the use process.
The drawing test can directly obtain the magnitude of the borne external force through the area magnitude of the bonding pad. The commonly used measurement methods refer to IPC-TM 650.4.21, the method has a requirement of vertical pulling, and the verticality is difficult to guarantee under the condition that an experimental body is not damaged in the actual PCB welding process.
At present, the lower end clamp of a tension chain is used for clamping the top end of a welding needle in a Pad drawing test, an original jig of equipment moves on a horizontal guide rail, and vertical drawing is realized at the lower end of the chain.
However, clamping the welding pin by means of a clip has the following major drawbacks: 1) The clamp clamps the welding needle, so that the welding needle is easy to be subjected to external force when being fixed, and the clamp is easy to shake, so that the bottom end of the welding needle and a Pad positioned at the lower end of the welding needle are stressed to damage a welding structure, and the tensile test fails (or the tensile test data is distorted, and the data fluctuation is high); the clamp is easy to shake, so that the clamp and a chain for connecting the clamp are not on the same vertical line, the welding needle and the chuck cannot guarantee perpendicularity, and force deviation is easy to occur; 2) The clamp has heavier weight, and after the welding needle is clamped and the welding needle is welded with the welding point on the welding pad, the welding pad is pressed by the self weight of the clamp in a drawing test so as to damage the welding point; 3) When the welding needle is clamped, the clamped part of the welding needle is contacted with the clamp to be damaged, and the service life of the welding needle is influenced; 4) When the welding needle is clamped on the clamp, the bolt on the clamp needs to be loosened, then the welding needle is clamped in the clamping space of the clamp, and then the bolt is screwed to clamp the welding needle, so that the operation is complex and the required time is long; 5) The cost of the clip is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a draw test auxiliary structure to realize the peel strength test of vertical direction.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a drawing test auxiliary structure comprises a welding needle and a connecting assembly, wherein one end of the welding needle is connected with a fixing part, and the other end of the welding needle is used for being welded with a pad to be tested; the fixed part is in a circular ring shape or a circular ring shape with a gap, and the circle center of the fixed part is positioned in the extending direction of the welding needle;
the connecting assembly comprises a chain and a connecting part connected with the chain, the chain is used for being connected with a pull rod of the drawing test machine, the connecting part is in a circular ring shape or a circular ring shape with a notch, and the circle center of the connecting part is positioned in the extending direction of the chain;
in a test state, the chain is connected with a pull rod of a drawing test machine, and one of the fixing part and the connecting part penetrates into the middle space of the other one.
Preferably, the diameter of the fixing part is equal to that of the connecting part.
Preferably, the fixing portion and the connecting portion are both in a circular ring shape with a gap, and the gap is larger than the thickness of the fixing portion and the connecting portion.
Preferably, the fixing portion is circular ring-shaped, and the connecting portion is circular ring-shaped with a notch.
Preferably, the circumference of the connecting part is greater than one half of the circumference of a full circle and less than the circumference of the full circle, and the full circle is a circle formed by taking the center of the connecting part as the center of the circle.
Preferably, the fixing portion is in a non-closed ring shape having a notch, and the connecting portion is in a ring shape.
Preferably, the circumference of the fixing part is greater than one half of the circumference of a full circle and less than the circumference of the full circle, and the full circle is formed by taking the center of the connecting part as the center of the circle.
Preferably, coupling assembling still include the connecting rod, the connecting rod one end with connecting portion connect, the connecting rod the other end with the chain connect, the extending direction of connecting rod with the extending direction of chain unanimous, the centre of a circle of connecting portion be located the extending direction of connecting rod on.
Preferably, the welding needle and the fixing portion are of an integral structure, and the fixing portion is formed by bending one end of the welding needle.
Preferably, the fixing portion and the connecting portion are made of metal material.
Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
the utility model provides a draw test auxiliary structure, after cup jointing through fixed part and connecting portion, the fixed part offsets with the inside circular arc of connecting portion, and both atresss and chain pull direction unanimous in the test realize vertical pull, realize the peel strength test of vertical direction, and can not harm the welding needle; the cost of the fixing part and the connecting part is low.
Drawings
Fig. 1 is a schematic structural view of a welding pin and a fixing portion of the drawing test auxiliary structure provided by the present invention;
fig. 2 is a schematic structural view of a chain and a connecting portion of the pull-out test auxiliary structure provided by the present invention;
fig. 3 is a schematic structural view of the connection between the fixing portion and the connecting portion of the auxiliary structure for drawing test provided by the present invention;
figure 4 is the utility model provides a draw the structure schematic diagram of test machine.
In the above drawings: 1-a welding needle, 2-a fixing part, 3-a chain, 4-a connecting part, 5-a connecting rod, 6-a drawing testing machine and 61-a pull rod.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, a pull test auxiliary structure is provided, which is used in cooperation with a pull test machine to complete a pull test. The drawing test machine 6 comprises a main body and a pull rod 61 connected with the main body, wherein the pull rod 61 extends along the vertical direction, and the pull rod 61 can move up and down in the vertical direction.
Draw test auxiliary structure and include welding needle 1 and coupling assembling, welding needle 1 has certain length, and the one end and the fixed part 2 of welding needle 1 are connected (if the welding), and the other end of welding needle 1 is used for with the examination pad welding that awaits measuring, and under the test condition, the vertical setting of welding needle 1.
In this case, the welding pin 1 is designed as a cylindrical pin with dimensions of 0.8 to 1.5mm (the dimensioning is related to the size of the pull PAD, which is usually 1/3 of the welding diameter).
The fixing part 2 is in a ring shape (with the same diameter) or a ring shape with a gap (non-closed ring shape), the fixing part 2 is provided with a circle center, and the circle center of the fixing part 2 is positioned in the extending direction of the welding needle 1. If the fixing part 2 is in a ring shape, the fixing part 2 is connected with one end of the welding needle 1, such as welding; or the fixing part 2 is in a ring shape with a gap, the fixing part 2 is provided with a first end and a second end, a gap is arranged between the first end and the second end, one of the first end and the second end of the fixing part 2 is connected with the welding needle 1, the fixing part 2 is positioned below the connecting part 4 in a test use state, and the gap on the fixing part 2 needs to fall below so as to be convenient for matching with the connecting component; or the welding needle 1 and the fixing portion 2 are integrated, that is, the fixing portion 2 is formed by bending one end of the welding needle 1, and the fixing portion 2 is a circular ring or a ring with a gap. The fixed part 2 that sets up can not cause the damage to welding needle 1, and connects welding needle 1 firm, can guarantee to pull perpendicularly.
In some embodiments, the diameter of the fixing part 2 is set according to actual needs, and the diameter can be designed to be 6-10mm.
The connecting assembly comprises a chain 3 and a connecting part 4 fixedly connected with the chain 3, the chain 3 is used for being connected with a pull rod 61 of a drawing testing machine 6, the pull rod 61 is provided with a hook, and the chain 3 is connected to the hook. The connecting part 4 is in a ring shape (with the same diameter) or a ring shape with a gap (non-closed ring shape), and the circle center of the connecting part 4 is positioned in the extending direction of the chain 3. If the connecting part 4 is in a circular ring shape, the connecting part 4 is connected with the chain 3, such as welded; or connecting portion 4 is the ring shape that has the breach, and connecting portion 4 has first end and second end, has the breach between first end and the second end, and one in the first end of connecting portion 4 and the second end is connected with chain 3, and under the test user state, the breach on connecting portion 4 needs upwards, is convenient for cooperate with fixed part 2.
In some embodiments, the diameter of the connecting portion 4 is set according to actual needs, and the diameter can be designed to be 6-10mm.
In this example, the chain 3 comprises a plurality of links connected in series, and the length of the chain 3 can be adjusted by reducing or increasing the number of links as required.
In this embodiment, at least one of the fixing portion 2 and the connecting portion 4 is a ring shape having a gap, and when in use, one of the fixing portion 2 and the connecting portion 4 penetrates into the middle space of the other to be sleeved, as shown in the connection state of fig. 3.
Under test condition, chain 3 is connected with the pull rod 61 of drawing test machine 6, and fixed part 2 is located connecting portion 4 below, and in fixed part 2 penetrated another middle part space with one in connecting portion 4, fixed part 2 and connecting portion 4 were the circle column structure, utilized the tangent principle of ring and ring, two upper and lower circles atress and chain 3 pull the direction unanimously and realize dragging perpendicularly, and the realization can not be like the welding effect of clamp damage welding needle 1.
In one embodiment, the fixing portion 2 and the connecting portion 4 are both in a circular ring shape with a gap, and the gap is greater than the thickness of the fixing portion 2 and the connecting portion 4, so that one of the fixing portion 2 and the connecting portion 4 can penetrate into the middle space of the other. Referring to fig. 1 and 2, the circumference of the fixing portion 2 is three quarters of a full circle, which is a full circle formed by taking the center of the circle of the fixing portion 2 as the center of the circle; the perimeter of the connecting part 4 is three quarters of a full circle, which is a full circle formed by taking the center of the circle of the connecting part 4 as the center of the circle.
In another embodiment, the fixing portion 2 is a closed circular ring, the connecting portion 4 is a circular ring with a gap, in a test use state, the connecting portion 4 and the fixing portion 2 can be sleeved by corresponding the gap of the connecting portion 4 to the fixing portion 2, the circumference of the connecting portion 4 is larger than one half of the circumference of the whole circle and smaller than the circumference of the whole circle, and the whole circle is a whole circle formed by using the center of the circle of the connecting portion 4 as the center.
In another embodiment, the fixing portion 2 is in a non-closed ring shape with a notch, the connecting portion 4 is in a closed ring shape, and in a test use state, the connecting portion 4 and the connecting portion 4 can be sleeved by corresponding the connecting portion 4 at the notch of the fixing portion 2, a circumference of the fixing portion 2 is greater than a half of a full circle and smaller than the full circle, and the full circle is a full circle formed by using a center of the connecting portion 4 as a center.
In a preferred embodiment, one of the fixing portion 2 and the connecting portion 4 is in a closed ring shape, the other is in a non-closed ring shape with a notch, the diameters of the fixing portion 2 and the connecting portion 4 are equal, that is, the fixing portion 2 and the connecting portion 4 both have an inner circle and an outer circle, the diameter of the inner circle corresponding to the fixing portion 2 and the connecting portion 4 is equal, and the diameter of the outer circle corresponding to the fixing portion 2 and the connecting portion 4 is equal; or the fixing part 2 and the connecting part 4 are both in a circular ring shape with a gap, the fixing part 2 and the connecting part 4 are the same in shape and size, and the fixing part 2 and the gap of the connecting part 4 are correspondingly convenient to be sleeved into one another in a test use state.
Further, coupling assembling still includes connecting rod 5, and connecting rod 5 is rectangular shape, and the one end and the connecting portion 4 of connecting rod 5 are connected (can weld), and the other end and the chain 3 of connecting rod 5 are connected, and the extending direction of connecting rod 5 is unanimous with the extending direction of chain 3, the centre of a circle of connecting portion 4 be located the extending direction of connecting rod 5.
In this embodiment, the fixing portion 2 and the connecting portion 4 are made of metal material, such as high hardness alloy which is easy to weld, so as to avoid bending under stress. The chain 3 is made of light and hard material.
The drawing test machine comprises a body, wherein a pull rod is connected to the body, a driving part is arranged in the body, and the driving part is connected with the pull rod and used for driving the pull rod to move in the vertical direction.
The drawing test was performed using the drawing test auxiliary structure and the drawing tester of this example in the following specific embodiments: the drawing test machine is located on the workbench, the base is placed on the workbench and located below the pull rod, a pad product to be tested is fixed on the base, one end, away from the fixing portion, of the welding needle is welded with a welding point on the pad, the product is moved to the position below the pull rod, then the fixing portion is connected with the connecting piece, and finally the pull rod moves upwards to conduct drawing test.
The utility model provides a draw test auxiliary structure, after cup jointing through fixed part and connecting portion, the fixed part offsets with the inside circular arc of connecting portion, and both atresss and the chain pulls the direction unanimously in the test and realize vertical dragging, realize the peel strength test of vertical direction, and can not harm the welding needle; the cost of the fixing part and the connecting part is low. The auxiliary structure for the drawing test can eliminate the external influence factors of the test and can better ensure the reliability of the product test.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. The drawing test auxiliary structure is characterized by comprising a welding needle and a connecting assembly, wherein one end of the welding needle is connected with a fixing part, and the other end of the welding needle is used for being welded with a bonding pad to be tested; the fixed part is in a circular ring shape or a circular ring shape with a gap, and the circle center of the fixed part is positioned in the extending direction of the welding needle;
the connecting assembly comprises a chain and a connecting part connected with the chain, the chain is used for being connected with a pull rod of the drawing test machine, the connecting part is in a circular ring shape or a circular ring shape with a notch, and the circle center of the connecting part is positioned in the extending direction of the chain;
in a test state, the chain is connected with a pull rod of a drawing test machine, and one of the fixing part and the connecting part penetrates into the middle space of the other one.
2. The pull-out test aid structure according to claim 1, wherein the fixing portion and the connecting portion have the same diameter.
3. The pull-out test auxiliary structure according to claim 1, wherein the fixing portion and the connecting portion are each in a circular ring shape having a gap, and a distance between the gaps is larger than a thickness of the fixing portion and the connecting portion.
4. The pull-out test auxiliary structure according to claim 1, wherein the fixing portion has a circular ring shape, and the connecting portion has a circular ring shape having a notch.
5. The pull-out test auxiliary structure according to claim 4, wherein the circumference of the connecting portion is greater than one half of the circumference of a full circle and less than the circumference of the full circle, and the full circle is a circle formed by taking the center of the connecting portion as the center.
6. The pull-out test auxiliary structure according to claim 1, wherein the fixing portion has a non-closed ring shape having a notch, and the connecting portion has a ring shape.
7. The pull-out test auxiliary structure according to claim 6, wherein the circumference of the fixing portion is larger than one half of the circumference of a full circle and smaller than the circumference of the full circle, and the full circle is a circle formed by taking the center of the connecting portion as the center.
8. The auxiliary structure for the drawing test according to claim 1, wherein the connecting assembly further comprises a connecting rod, one end of the connecting rod is connected with the connecting portion, the other end of the connecting rod is connected with the chain, the extending direction of the connecting rod is consistent with the extending direction of the chain, and the center of the circle of the connecting portion is located in the extending direction of the connecting rod.
9. The pull-out test auxiliary structure according to claim 1, wherein the soldering pin and the fixing portion are an integral structure, and the fixing portion is formed by bending one end of the soldering pin.
10. The pull-out test auxiliary structure according to claim 1, wherein the fixing portion and the connecting portion are made of a metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222340640.XU CN218546360U (en) | 2022-09-02 | 2022-09-02 | Draw test auxiliary structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222340640.XU CN218546360U (en) | 2022-09-02 | 2022-09-02 | Draw test auxiliary structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218546360U true CN218546360U (en) | 2023-02-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222340640.XU Active CN218546360U (en) | 2022-09-02 | 2022-09-02 | Draw test auxiliary structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218546360U (en) |
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2022
- 2022-09-02 CN CN202222340640.XU patent/CN218546360U/en active Active
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