Method for detecting and screening tin columns based on multi-dimensional visual direction
By adopting a multi-dimensional visual direction detection method in the production of tin columns, the length and end surface flatness of the tin columns are detected by the retention of colored alcohol, the problem of difficulty in detecting the quality of tin columns at low cost in the prior art is solved, and efficient and fast tin column screening is achieved.
Patent Information
- Application Number
- CN202510161481.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2025-04-15
AI Technical Summary
In the production process of micro tin columns, it is difficult for the prior art to detect the end surface flatness and length of the tin columns at low cost and efficiently, especially without the use of high-definition imaging terminals, magnifying glasses or microscopes.
Using a multi-dimensional visual direction detection method, a detection tool made of colorless transparent materials is used to detect the length and end surface flatness of the tin column in three dimension directions (directly above, directly below and end).
The end surface flatness and length of tin columns are detected at low cost and efficiently, and ordinary operators can quickly and accurately screen out unqualified tin column products, avoiding the limitation of using high-end instruments.
Smart Images
Figure CN119826666A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of tin pillar production, and in particular to a method for detecting and screening tin pillars based on multi-dimensional visual directions. Background Art
[0002] In the production process of micro solder pillars (diameter no greater than 5mm, length no greater than 12mm), it is usually necessary to conduct quality inspection and screening on the formed products. Taking the production of high-quality solder pillars as an example, it is necessary to strictly control the end surface flatness, roundness and length, and remove products with unqualified end surface flatness, roundness and length.
[0003] In the process of mass production of tin pillars, there are existing methods for detecting the roundness of tin pillars, but the detection methods for the end surface flatness and length need to be further optimized. More importantly, there is currently no low-cost and effective detection method for the end surface flatness and length without the aid of high-definition camera terminals, and production technicians cannot clearly observe unqualified tin pillar products without the aid of magnifying glasses, microscopes and other instruments. Summary of the invention
[0004] At least in view of the problems mentioned in the background technology, the present invention aims to provide a method for detecting and screening tin pillars based on multi-dimensional visual directions.
[0005] The present invention adopts the following technical solution.
[0006] A method for detecting and screening tin pillars based on multi-dimensional visual directions, comprising: Step 1, placing the tin column to be tested into a testing jig, wherein the testing jig is made of colorless and transparent material; Step 2, vibrate or shake the test jig and spread the tin column so that the tin column fits in the standard groove of the test jig; the length of the standard groove is consistent with the designed length of the tin column, and the size of each standard groove is consistent; Step 3, lay the test jig flat, then pour colored alcohol into the test jig and let it stand for a set time; Step 4, open the drain pipe on the detection jig to drain the excess colored alcohol on the surface of the detection jig; Step 5, observe the colored alcohol remaining in the standard tank from directly above, directly below and at the end of the detection jig (three-dimensional directions); Step 6, the tin pillars in the standard slots with more colored alcohol are removed, and the tin pillars in the remaining standard slots are the tin pillars with qualified length and cross-sectional flatness; Step 7, collect tin columns of qualified length and air-dry them.
[0007] Preferably, the criterion for judging whether the colored alcohol remains more includes: at least one end of the tin column in the standard tank has colored alcohol.
[0008] In order to more accurately screen out unqualified tin columns, the criteria for judging whether the colored alcohol remains more include: colored alcohol exists at one or both ends of the tin column in the standard slot, and the height of the colored alcohol at the end of the tin column is not less than 1 / 3 of the height of the standard slot.
[0009] Furthermore, the width of the inspection jig is 1.5 to 2 times the length of the standard slot.
[0010] Furthermore, the depth of the standard groove is 2 / 3 of the diameter of the tin column. Such a structure is not only conducive to the rapid removal of unqualified products, but also conducive to the smooth detection and screening of tin columns.
[0011] Furthermore, a plurality of standard slots are arranged in parallel. Such a structure is conducive to more conveniently observing the qualified status of the tin pillars.
[0012] Preferably, the colored alcohol is red, yellow, purple or green alcohol, and the pigment component of the colored alcohol will not react with the tin column.
[0013] Furthermore, the partitions between adjacent standard slots are made of elastic transparent silicone, and the radial expansion of the standard slot is no more than 1 mm under the action of external force, and the outer sides of both ends of the standard slot are made of hard transparent material. This solution can ensure that the tin pillars that meet the quality requirements and the shorter tin pillars can be smoothly inserted into the standard slots without deformation, which is conducive to more accurate detection and screening of tin pillars that meet the quality requirements.
[0014] Preferably, the operation mode of the spreading detection jig is: rolling and pressing the tin column at the standard groove so that the tin column is stuck in the corresponding standard groove, and the rolling and pressing force is not greater than 70N.
[0015] Beneficial effects: By adopting the scheme of the present invention, the flatness and length of the end face of the tin column can be detected at low cost and with high efficiency without the aid of instruments such as high-definition camera terminals, magnifying glasses, microscopes, etc. Ordinary operators can also operate smoothly and quickly, and can clearly observe products that do not meet the requirements, which is very convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the detection tool in Example 1; Figure 2 A schematic diagram of a tin column in the embodiment; Figure 3 It is a three-dimensional schematic diagram of the tin column loaded into the detection jig in Example 1; Figure 4 It is a cross-sectional schematic diagram of the tin pillar loaded into the detection jig in Example 1 (that is, a schematic diagram of the detection state). DETAILED DESCRIPTION
[0017] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1
[0018] Combination Figures 1 to 4 As shown, a method for multi-dimensional visual inspection and screening of tin pillars is used, and a detection jig is used. The detection jig includes a baffle 1 made of a colorless transparent material (acrylic plate), and a bottom plate 3 made of colorless transparent silicone and acrylic plate. The barrier 7 between adjacent standard grooves 5 on the bottom plate 3 is made of elastic transparent silicone, and the radial expansion amount of the standard groove 5 is not more than 1mm (specifically, when the radial extrusion force is not more than 70N, the radial expansion amount of the standard groove 5 is not more than 1mm), and the outer parts 8 of the two ends of the standard groove 5 are made of hard acrylic. The bottom plate 3 is made of a plate; the bottom plate 3 is 10 mm thick, and is enclosed by the bottom plate 3 and the baffle 1 to form an inner cavity capable of accommodating liquid, the depth of the inner cavity is 12 mm, a drain pipe 6 is arranged on the bottom plate 3, a pipe cap 4 is arranged on the drain pipe 6, and a plurality of spaced and parallel standard grooves 4 (i.e., strip grooves) are arranged on the bottom plate 3, the radial cross-section of the standard groove 4 is in an arc shape, the length of the standard groove 4 is equal to the designed length of the tin column 2, the depth of the standard groove 4 is equal to 2 / 3 of the diameter of the tin column 2 (standard tin column, that is, a qualified tin column product), and the width of the detection jig is twice the length of the standard groove 4.
[0019] The method for detecting and screening the tin pillars 2 in this embodiment is used to detect and screen the tin pillars with a length of 5 mm and a diameter of 3 mm. The specific steps include: Step 1, placing the tin column 2 (tin column, the same below in this example) to be tested into the testing jig; Step 2, shaking the testing jig and spreading the tin pillar 2 so that the tin pillar 2 fits in the standard groove 4 of the testing jig; The operation method of the spreading detection jig is: use a silicone strip or fingers to repeatedly roll and press the tin column 2 at the standard slot 4, so that the tin column 2 is stuck into the corresponding standard slot 4, and the force pressing the tin column 2 is not more than 70N; Step 3, lay the test jig flat, then pour colored alcohol into the test jig and let it stand for a set time (2 minutes); Step 4, opening the drain pipe 6 on the detection jig to drain the excess colored alcohol on the surface of the detection jig, where the excess colored alcohol refers to the alcohol that has not flowed into the standard tank 4; Step 5, observing the colored alcohol remaining in the standard tank 4 from above, below and at the end of the detection jig; Step 6, removing the tin pillars 2 in the standard slots 4 where more colored alcohol remains, and the tin pillars 2 in the remaining standard slots 4 are the tin pillars 2 with qualified length and cross-sectional flatness; Among them, the judgment criteria for the presence of more colored alcohol include: one end or both ends of the tin column 2 in the standard groove 4 have colored alcohol, and the height of the colored alcohol at the end of the tin column 2 is not less than 1 / 3 of the height of the standard groove 4; Step 7, collecting the tin pillars 2 of qualified length and air-drying them.
[0020] The principle / technical key points of detecting and screening unqualified tin pillars 2 in this embodiment are as follows: When the length of the tin column 2 to be tested is less than the length of the standard slot 4, the standard slot 4 will not be filled, and the colored alcohol will enter the remaining part of the standard slot 4 and remain there. In this case, obvious colored alcohol can be seen at one or both ends of the tin column 2, and the height of the colored alcohol at the end of the tin column 2 will not be less than 1 / 3 of the height of the standard slot. Figure 4 As shown, the length of the second tin column 22 is less than the length of the standard slot 4. At this time, the standard slot 4 will not be filled, and the height of the colored alcohol 12 at the end of the second tin column 22 is equal to the depth of the standard slot 4. In this case, the corresponding second tin column 22 is a product whose length and end face are unqualified; when the length of the tin column 2 to be tested is greater than the length of the standard slot 4, the standard slot 4 will not be filled (because the tin column 2 cannot fit in the standard slot 4 at all, and one end of the tin column 2 will be placed on the top surface of the bottom plate 3), and the colored alcohol will also enter the remaining part of the standard slot 4 and remain. In this case, obvious colored alcohol can be seen at one or both ends of the tin column 2 and at the bottom of the standard slot 4, and the height of the colored alcohol at the end of the tin column 2 will not be less than 1 / 3 of the height of the standard slot, as shown in FIG. Figure 4 As shown, the length of the third tin column 23 is greater than the length of the standard slot 4. At this time, the standard slot 4 will not be filled, and the height of the colored alcohol 13 at the end of the third tin column 23 is also equal to the depth of the standard slot 4. In this case, the corresponding third tin column 23 is a product whose length and end face are unqualified; when the end face of the tin column 2 to be tested is an inclined structure, the standard slot 4 will not be filled, and the colored alcohol will also enter the remaining part of the standard slot 4 and remain. In this case, obvious colored alcohol can be seen at one end or both ends of the tin column 2. In this case, the corresponding tin column is also a product whose length and end face are unqualified. When the length of the tin column 2 to be tested is equal to the length of the standard slot 4, the standard slot 4 is just filled, and only a small amount of colored alcohol enters the standard slot 4 or even cannot enter the standard slot 4. At this time, only a small amount of colored alcohol can be seen at the end of the standard slot 4 or even no colored alcohol can be seen. Figure 4As shown, no colored alcohol can be seen at the end of the first tin column 21, and only a small amount of colored alcohol 10 is found at the end of the fourth tin column 20. In this case, the corresponding first tin column 21 and fourth tin column 20 are qualified products in terms of length and end face. Therefore, as long as the tin column 2 matches the standard slot 4, the operator can quickly determine whether the tin column 2 is qualified by observing the colored alcohol remaining in the standard slot from the top, bottom and end of the detection jig, which is very convenient.
[0021] By adopting the scheme of this embodiment, the flatness and length of the end face of the tin column 2 can be detected at low cost and high efficiency without the aid of high-end instruments such as high-definition camera terminals and microscopes. Ordinary operators can also operate smoothly and quickly, and can clearly observe products that do not meet the requirements, which is very convenient and practical. Taking the detection and screening of a detection jig with 1000 standard slots 4 as an example, it takes less than five minutes to complete the screening of 1000 tin columns with unqualified length and end faces (wherein, it takes about 1 minute to vibrate or shake the detection jig and spread the tin column, it takes about 2.5 minutes to pour colored alcohol into the detection jig and let it stand, and it takes about 1 minute to observe the end face of the detection jig and remove unqualified tin columns); while the traditional scheme uses a high-definition camera terminal for detection and screening, and the detection and screening of 1000 tin columns takes about one hour (mainly because the shooting time and data processing process on the assembly line are very time-consuming), and it is even slower if manual screening is used.
[0022] Embodiment 2: A method for detecting and screening tin pillars based on multi-dimensional visual directions, referring to Embodiment 1, the difference between this embodiment and Embodiment 1 is that one end of the standard slot 4 and the inner wall of one of the baffles 1 of the standard slot 4 are located on the same vertical plane. The advantages of this embodiment over Embodiment 1 also include: the tin pillars 2 can be spread in the standard slot 4 more quickly and smoothly.
Claims
1. A method for detecting and screening tin pillars based on multi-dimensional visual directions, characterized in that the steps include: Step 1, placing the tin column to be tested into a testing jig, wherein the testing jig is made of colorless and transparent material; Step 2, vibrate or shake the test jig and spread the tin pillars so that the tin pillars fit into the standard grooves of the test jig; Step 3, lay the test jig flat, then pour colored alcohol into the test jig and let it stand for a set time; Step 4, open the drain pipe on the detection jig to drain the excess colored alcohol on the surface of the detection jig; Step 5, observe the colored alcohol remaining in the standard tank from above, below and at the end of the detection jig; Step 6, the tin pillars in the standard slots with more colored alcohol are removed, and the tin pillars in the remaining standard slots are the tin pillars with qualified length and cross-sectional flatness; Step 7, collect tin columns of qualified length and air-dry them.
2. The method according to claim 1, characterized in that The criterion for judging whether the colored alcohol remains relatively large includes: at least one end of the tin column in the standard tank has colored alcohol.
3. The method according to claim 1, characterized in that The judgment criteria for whether the colored alcohol remains more include: colored alcohol exists at one end or both ends of the tin column in the standard groove, and the height of the colored alcohol at the end of the tin column is not less than 1 / 3 of the height of the standard groove.
4. The method according to claim 1, characterized in that: The width of the inspection jig is 1.5 to 2 times the length of the standard slot.
5. The method according to claim 1, characterized in that: The standard slot depth is 2 / 3 of the diameter of the tin column.
6. The method according to claim 1, characterized in that: Several standard slots are arranged in parallel.
7. The method according to any one of claims 1 to 6, characterized in that: Colored alcohol comes in red, yellow, purple or green.
8. The method according to claim 7, characterized in that: The partitions between adjacent standard grooves are made of elastic transparent silicone, and the radial expansion and contraction of the standard grooves is no more than 1 mm. The outer sides of both ends of the standard grooves are made of hard transparent materials.
9. The method according to claim 8, characterized in that The operation method of the spreading detection jig is: rolling and pressing the tin column at the standard groove to make the tin column stuck into the corresponding standard groove.