CN116698131A - Detection system and method for welding quality of liquid cooling heat dissipation product - Google Patents
Detection system and method for welding quality of liquid cooling heat dissipation product Download PDFInfo
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- CN116698131A CN116698131A CN202310843446.XA CN202310843446A CN116698131A CN 116698131 A CN116698131 A CN 116698131A CN 202310843446 A CN202310843446 A CN 202310843446A CN 116698131 A CN116698131 A CN 116698131A
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- 238000001514 detection method Methods 0.000 title claims abstract description 368
- 238000003466 welding Methods 0.000 title claims abstract description 151
- 239000007788 liquid Substances 0.000 title claims abstract description 144
- 238000001816 cooling Methods 0.000 title claims abstract description 122
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 118
- 238000000034 method Methods 0.000 title claims description 42
- 238000012797 qualification Methods 0.000 claims abstract description 72
- 238000007789 sealing Methods 0.000 claims description 29
- 238000007689 inspection Methods 0.000 claims description 21
- 125000004122 cyclic group Chemical group 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000001066 destructive effect Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 description 28
- 230000007547 defect Effects 0.000 description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 239000008367 deionised water Substances 0.000 description 7
- 229910021641 deionized water Inorganic materials 0.000 description 7
- 239000002390 adhesive tape Substances 0.000 description 6
- 239000011521 glass Substances 0.000 description 5
- 238000003754 machining Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000009659 non-destructive testing Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 238000010191 image analysis Methods 0.000 description 4
- 238000005219 brazing Methods 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013170 computed tomography imaging Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
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Abstract
The invention discloses a detection system and a detection method for welding quality of a liquid cooling heat dissipation product, and relates to the technical field of welding quality detection of electronic equipment; based on the characteristics of the products, generating detection items associated with each liquid cooling heat dissipation product to be detected through a main control unit, and transmitting data to each related detection unit; the conveying unit conveys the products to different detection units for corresponding detection; and when each detection item of the product meets the qualification criterion, the product is taken as a qualified product to be downwards transferred. The omnibearing accurate detection of the welding quality of the liquid cooling heat dissipation product with higher requirements on the welding seam quality in the electronic equipment is realized.
Description
Technical Field
The invention relates to the technical field of welding quality detection of electronic equipment, in particular to a system and a method for detecting welding quality of a liquid cooling heat dissipation product.
Background
In the field of electronic equipment, a set of heat dissipation system relates to a plurality of functional components, such as a liquid cooling rack, a water cooling plate, a flow dividing plate and the like, wherein the related welding method comprises vacuum brazing, diffusion welding and electron beam welding so as to meet the liquid passing and heat dissipation requirements of different liquid cooling heat dissipation products, including a liquid cooling plate, a box body and a flow dividing plate.
However, for the welding quality inspection of the liquid cooling heat dissipation products, the industry mainly comprises appearance inspection, nondestructive inspection, sealing inspection and the like, but the inspection methods are single in functionality and mainly applied to welding blanks, cannot form a unified inspection strategy to perform all-dimensional and multidimensional welding quality inspection and quality judgment on the liquid cooling heat dissipation products, and mainly comprises indirect appearance inspection and sealing inspection for the welding quality inspection after the final processing (finish processing) of the liquid cooling heat dissipation products, so that the welding quality of the final state of the products is difficult to visually inspect and accurately control.
When the requirements of high-power heat dissipation and high welding quality are met, the reliability of the welding quality is difficult to ensure by conventional inspection, particularly, the quality of the welding seam is difficult to accurately judge aiming at the welding seam such as a large-size high-power cold plate surface welding seam, a heat dissipation box body surface welding seam of a tiny runner, a vertically and horizontally crossed split plate line welding seam and the like, the manufacturing quality of a product is seriously influenced, the problems of liquid leakage and runner blockage caused by the welding defect of a liquid cooling heat dissipation product have hysteresis, and particularly, the problems are exposed in the use process of the product, so that the influence is very huge.
Disclosure of Invention
In order to solve the problems, the invention provides a detection system and a detection method for the welding quality of a liquid cooling heat dissipation product, which are used for comprehensively detecting the appearance quality and the internal quality of a welding seam of the liquid cooling heat dissipation product with higher requirements on the welding seam quality in electronic equipment, can realize the omnibearing accurate detection of the welding quality of the liquid cooling heat dissipation product, accurately identify and screen out the liquid cooling heat dissipation product with the welding quality problem, realize the avoidance of the welding quality problem in the manufacturing stage, and obviously improve the service performance and the service life of the electronic equipment by identifying defects and hidden dangers which are difficult to be found by a traditional and single detection method through a multi-dimensional and flow detection method.
The invention provides a detection system for welding quality of liquid cooling heat dissipation products, which comprises the following specific technical scheme:
the system comprises a main control unit, a transmission unit and a detection unit, wherein the main control unit comprises an index setting module and a product characteristic input module; the detection unit is connected with the transmission unit; the main control unit is connected with the detection unit and is used for data synchronization;
the main control unit is used for generating detection items associated with each liquid cooling heat dissipation product to be detected and transmitting data to each related detection unit;
the conveying unit is used for conveying the liquid cooling heat dissipation products to be detected to different detecting units according to the parameters set by the main control unit to carry out corresponding detection;
the detection unit is used for detecting the currently received liquid cooling heat dissipation product according to the qualification criterion;
the index setting module is used for setting qualified criteria corresponding to each detection item and transmitting the qualified criteria to the corresponding detection unit;
the product characteristic input module is used for inputting structural characteristics, welding methods and welding positions, selecting a scanning mode according to the structural characteristics, the welding methods and the welding positions and transmitting the scanning mode to the corresponding detection units.
Further, the index setting module comprises a custom mode and a selection mode;
the custom mode is used for newly adding a qualified criterion, correspondingly setting a qualified parameter threshold value, and setting detection items and sequences;
the selection mode is used for selecting a generated detection flow containing a plurality of detection items and a correspondingly set qualified criterion stored in the system, and selecting a parameter threshold corresponding to the set qualified criterion;
all the qualified criteria set by the index setting module are associated and correspond to the liquid cooling heat dissipation products to be detected currently.
Further, the detection unit is provided with an external display screen and is used for displaying and outputting detection data corresponding to the current liquid cooling heat dissipation product, and the detection data comprises a unique identification number and a qualified criterion of the liquid cooling heat dissipation product.
Furthermore, the detection data also comprise the corresponding structural characteristics, welding method and welding position of the current liquid cooling heat dissipation product.
Further, the scanning mode comprises ultrasonic C scanning and X-ray scanning.
The invention further provides a detection method for welding quality of the liquid cooling heat dissipation product based on the detection system, which comprises the following steps:
s1: acquiring liquid cooling heat dissipation products to be detected, and recording the liquid cooling heat dissipation products as current liquid cooling heat dissipation products, wherein each liquid cooling heat dissipation product to be detected is provided with a unique identification number;
s2: acquiring the liquid passing index requirement, the structural characteristics, the welding method and the welding position of a liquid cooling heat dissipation product to be detected, and generating a detection item and a qualification criterion;
s3: performing first detection on the current liquid cooling heat dissipation product, wherein each detection item of the first detection is provided with a corresponding qualification criterion;
s4: acquiring a welding mode of a current liquid cooling heat dissipation product, classifying detection tags, and judging whether the current liquid cooling heat dissipation product needs to be subjected to second detection or not;
each detection item of the second detection is provided with a corresponding qualification criterion;
s5: when the detection is carried out, the next detection item is detected according to the detection sequence when the qualification criteria are met, and when all the qualification criteria are met, a qualified label is attached to the current liquid cooling heat dissipation product, and the qualified product is transferred downwards; in the detection, if the qualified criterion corresponding to the current detection is not met, an unqualified label is attached to the detection item of the current liquid cooling heat dissipation product, and other detection items of the current liquid cooling heat dissipation product are attached to empty labels.
Further, the first detection includes a first appearance detection, a sealing detection, a first damage-free detection, and a flow resistance detection.
Further, before the first detection, judging whether a first requirement label is attached to the current liquid cooling heat dissipation product, if yes, adjusting detection items and sequence in the first detection according to the first requirement label, and if not, performing sequence detection based on the set detection items in the first detection.
Further, the second detection includes a second appearance detection, a second non-destructive detection, a cyclic pressure detection, and a seal detection.
Further, before the second detection, judging whether a second requirement label is attached to the current liquid cooling heat dissipation product, if yes, adjusting detection items and sequence in the second detection according to the second requirement label, and if not, performing sequence detection based on the set detection items in the second detection.
The beneficial effects of the invention are as follows:
according to the invention, through the characteristics of structural design, welding method and the like of key components of electronic equipment, detection items, detection sequences and qualification criteria are set, autonomous optimization is realized by combining the application characteristics of different detection technologies, a systematic and procedural multi-dimensional detection method is uniformly formed, the omnibearing accurate detection and evaluation of the welding quality of a liquid cooling heat dissipation product are realized, defects and hidden dangers which are difficult to find by a single traditional detection method can be identified, and the problem of welding quality is avoided in a manufacturing stage.
Drawings
FIG. 1 is a schematic flow chart of the method of the present invention.
FIG. 2 is a schematic flow chart of the invention for detecting the vacuum brazing quality of a certain liquid cooling box body.
FIG. 3 is a schematic flow chart of the invention for detecting the quality of vacuum diffusion welding in a certain liquid cooling box body.
FIG. 4 is a schematic flow chart of the invention in the detection of electron beam welding quality of a certain liquid cooling splitter plate.
Detailed Description
In the following description, the technical solutions of the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship conventionally put in use of the product of the present invention as understood by those skilled in the art, merely for convenience of describing the present invention and simplifying the description, and is not indicative or implying that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for understanding as indicating or implying a relative importance.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
The embodiment 1 of the invention discloses a detection system for welding quality of a liquid cooling heat dissipation product, which comprises a main control unit, a transmission unit and a plurality of detection units, wherein the main control unit comprises an index setting module and a product characteristic input module; the detection unit is connected with the transmission unit; the main control unit is connected with the detection unit and is used for data synchronization;
the main control unit is used for generating detection items associated with each liquid cooling heat dissipation product to be detected and transmitting data to each related detection unit;
the conveying unit is used for conveying the liquid cooling heat dissipation products to be detected to different detecting units according to the parameters set by the main control unit to carry out corresponding detection;
the detection unit is used for detecting the currently received liquid cooling heat dissipation product according to the qualification criterion;
the index setting module is used for setting qualified criteria corresponding to each detection item and transmitting the qualified criteria to the corresponding detection unit;
specifically, the system stores a set common detection flow comprising a plurality of detection items and corresponding qualified criterion data, the index setting module can be directly called, and if the index setting module performs self-defined setting, a required label is attached to the current liquid cooling heat dissipation product;
the product characteristic input module is used for inputting structural characteristics, a welding method and a welding position, selecting a scanning mode according to the structural characteristics, the welding method and the welding position and transmitting the scanning mode to the corresponding detection unit; in this embodiment, the scanning mode includes ultrasonic C-scan and X-ray scan.
In this embodiment, the index setting module includes a custom mode and a selection mode;
the custom mode is used for newly adding a qualified criterion, correspondingly setting a qualified parameter threshold value, and setting detection items and sequences;
the selection mode is used for selecting a generated detection flow containing a plurality of detection items and a correspondingly set qualified criterion stored in the system, and selecting a parameter threshold corresponding to the set qualified criterion;
all the qualified criteria set by the index setting module are associated and correspond to the liquid cooling heat dissipation products to be detected currently.
In this embodiment, the detection unit is provided with an external display screen, and is configured to display and output detection data corresponding to a current liquid cooling heat dissipation product, where the detection data includes a unique identification number and a qualification criterion of the liquid cooling heat dissipation product;
the detection data also comprise the corresponding structural characteristics, welding method and welding position of the current liquid cooling heat dissipation product.
Example 2
Embodiment 2 of the invention discloses a method for detecting welding quality of a liquid cooling heat dissipation product, which is based on the detecting system for welding quality of a liquid cooling heat dissipation product described in embodiment 1.
As shown in fig. 1 and 2, the specific steps are as follows:
s1: acquiring liquid cooling heat dissipation products to be detected, marking the liquid cooling heat dissipation products as current liquid cooling heat dissipation products, and setting unique identification numbers for each liquid cooling heat dissipation product to be detected;
s2: acquiring the liquid passing index requirement, the structural characteristics, the welding method and the welding position of a liquid cooling heat dissipation product to be detected, and generating a detection item and a qualification criterion;
analyzing the box body to obtain the liquid passing index requirement, the structural characteristics, the welding method and the welding position of the box body, and setting detection items and qualification criteria;
specifically, according to the qualification criterion in the detection step, according to the liquid passing index of the box body, the analysis setting is carried out on the appearance (including post-welding and post-finishing) quality of the welding seam, the internal quality (including post-welding rate, welding defect position and size) of the welding seam, the internal sealing performance, the flow resistance performance and the cyclic pressure impact resistance performance of the welding seam;
according to the structural characteristics, welding method and welding position of the product, ultrasonic C scanning is selected as a nondestructive testing means.
S3: performing first detection on the current liquid cooling heat dissipation product, wherein each detection item of the first detection is provided with a corresponding qualification criterion;
the first detection comprises first appearance detection, sealing detection, first damage-free detection and flow resistance detection.
In this embodiment, before the first detection, it is determined whether a first request label is attached to the current liquid cooling heat dissipation product, if yes, the detection items and the sequence in the first detection are adjusted according to the first request label, and if no, the sequence detection is performed based on the set detection items in the first detection.
First, the first appearance detection is specifically as follows:
placing a box body (blank) to be detected on a detection table, and welding the surface and the peripheral side surfaces of a welding area through a magnification magnifying glass and a searchlight;
the qualification criterion 1 is: the non-processed surface after welding does not allow the brazing filler metal to accumulate, overflow, splash, overburden and crack, and the maximum size of the air hole is not more than D 1 mm; through the observation result and the measurement result, if the appearance quality after welding meets the requirement of the qualified criterion 1, the detection of the next step is carried out;
the seal detection is specifically as follows:
and (5) connecting the product into sealing detection equipment for pressure resistance test, and detecting whether the sealing performance is qualified. Based on the characteristics of the product, the product is only provided with the runner and the runner port before welding, and the runner port is provided with the allowance for seal detection after welding to be provided with the internal threads with the same specification which can be tightly assembled with the density detection pipeline, so that a reliable seal detection test is realized in the step.
The qualification criterion 2 is as follows: after one runner port is connected to a pipeline of the sealing detection equipment, the other runner port is plugged by a threaded plug with a sealing ring, and the pressure P is tested 1 MPa, test time t 1 The product should not leak, bulge or deform after an hour.
And setting a seal detection parameter according to the qualified criterion 2, immersing the product in clean deionized water, observing whether leakage bubbles and bulge deformation occur or not, and finding that the product does not generate any phenomena until the test is completed, so that the requirement of the qualified criterion 2 is met, and the next step of detection can be performed.
The first nondestructive detection is specifically as follows:
in this embodiment, the first nondestructive detection is performed by using ultrasonic C-scan;
the qualification criterion 3 is as follows: the welding rate reaches eta, and the distance between a single cavity defect area and the inner cavity of the flow channel is required to be larger than d 1 mm, size is larger than welding width w 2 % of the individual defects must be spaced from the edge of the profile by a distance w greater than the weld width 3 ％。
Specifically, the runner port of the product is plugged by a special plugging adhesive tape, and the product is placed into a deionized water tank of ultrasonic C scanning equipment, so that the product is ensured to be completely immersed, and then the interior of a welding line is detected; the thinner side of the welded part faces upwards during detection, and the selected frequency is f 1 Setting ultrasonic C scanning surface detection parameters including a scanning water distance h 1 mm, scanning speed v 1 m/s, reflection amplitude threshold w 1 And (7) setting initial coordinates and end coordinates, and starting scanning.
And (3) analyzing the scanned image according to the qualification criterion 3, calculating the welding rate, the defect size and the position information, and if the requirements of the criterion 3 are met, performing nondestructive detection to be qualified and performing detection of the next step.
The seal detection is specifically as follows:
the qualification criterion 4 is as follows: at rated flow rate J 1 Under the condition of L/min, leading liquid t 2 The flow resistance test value was P for hours 2 ～P 3 And the two are qualified.
Specifically, the product is connected into a flow resistance detection device to carry out a flow resistance test, and whether the flow resistance performance is qualified is detected. Similarly, the threads of the product at the two runner ports are utilized to connect the two runner ports to the flow resistance detection pipeline, so as to form a liquid passage loop.
And setting flow resistance detection parameters according to the qualification criterion 4, recording a flow resistance test value, and if the flow resistance test value meets the requirement of the qualification criterion 4, detecting the flow resistance to be qualified and carrying out the detection of the next step.
S4: acquiring a welding mode of a current liquid cooling heat dissipation product, classifying detection tags, and judging whether the current liquid cooling heat dissipation product needs to be subjected to second detection or not;
and each detection item of the second detection is provided with a corresponding qualification criterion.
In this embodiment, the product needs to be finished, all the remaining margins after welding are removed, and the features of each part are processed to meet the drawing requirements, so that the finished detection, namely the second detection, needs to be performed.
In this embodiment, the second detection includes a second appearance detection, a second nondestructive detection, a cyclic pressure detection, and a sealing detection;
before second detection, judging whether a second requirement label is attached to the current liquid cooling heat dissipation product, if yes, adjusting detection items and sequence in the second detection according to the second requirement label, and if not, detecting the sequence based on the set detection items in the second detection.
First, the second appearance detection is specifically as follows:
and (3) placing the box body after finish machining on a detection table, and detecting the surface of the welded seam after machining through a multiple magnifying glass and a searchlight.
The qualification criterion 5 is as follows: after finishing, the surface of the welding seam is not allowed to have cracks, and the maximum size of air holes is not more than D 2 mm, and the sealing surface (liquid-passing port surface) is not allowed to have air holes.
And through observation results and measurement results, if the appearance quality after welding meets the requirement of the qualification criterion 5, the next detection step can be performed.
The second nondestructive testing is specifically as follows:
in this embodiment, the second nondestructive detection is performed by using ultrasonic C-scan;
the qualification criterion 6 is as follows: the distance between the single cavity defect area and the inner cavity of the flow channel is required to be larger than d 2 mm, size is larger than welding width w 4 % of the individual defects must be spaced from the edge of the profile by a distance w greater than the weld width 5 In% and d is not allowed around the area of the stud, screw hole, through hole and the like 3 The unwelded part exists in the mm rangeAnd (5) combining.
Specifically, the finished product runner port is plugged by a special plugging adhesive tape and is placed into a deionized water tank of ultrasonic C scanning equipment to ensure that the product is completely immersed, then the interior of a welding line is detected, and the selected frequency is f 2 Setting ultrasonic C scanning surface detection parameters including a scanning water distance h 2 mm, scanning speed v 2 m/s, then setting initial coordinates and end coordinates, and starting scanning.
Based on the scanned image analysis defect size and position information, if the scanned image analysis defect size and position information meet the requirements of a qualification criterion 6, the step is qualified for detection, and the next detection step can be performed.
The circulating pressure detection is specifically as follows:
the qualification criterion 7 is: in the pressure cycle of 0Mpa to P 4 At Mpa-0 Mpa, the rate is not less than C 1 Secondary/min, co-proceeding C 2 And the secondary pressure circulation, no liquid leakage and no deformation are caused in the testing process and after the completion.
Specifically, the finished product is connected into the circulating pressure detection equipment, two pipeline ports are connected into the circulating pressure test adapter tool, and the other end of the tool is connected into the detection pipeline, so that a liquid-passing loop is formed.
And (3) setting a circulating pressure detection parameter according to a qualification criterion 7, judging whether liquid leakage and deformation occur, and if the product is completely tested, detecting the product to be qualified, and carrying out the next detection step.
The seal detection is specifically as follows:
the qualification criterion is the same as the qualification criterion of the seal detection in the first detection step;
specifically, the finished product is connected to a seal detection device, one runner port is connected to a seal adapter tool, the other runner port is plugged by a threaded plug with a sealing ring after the other end of the tool is connected to a pipeline of the seal detection device; if the product has no phenomenon until the test is completed, the step is qualified.
S5: based on the detection flow, when the detection is performed, the next detection item is detected according to the detection sequence if the qualified criterion is met, and when the qualified criterion is met, a qualified label is attached to the current liquid cooling heat dissipation product; in the detection, if the qualified criterion corresponding to the current detection is not met, an unqualified label is attached to the detection item of the current liquid cooling heat dissipation product, and other detection items of the current liquid cooling heat dissipation product are attached to empty labels.
Example 3
Embodiment 3 of the invention discloses a method for detecting welding quality of a liquid cooling heat dissipation product, which is based on the detecting system for welding quality of a liquid cooling heat dissipation product described in embodiment 1.
As shown in fig. 1 and 3, the specific steps are as follows:
s1: acquiring liquid cooling heat dissipation products to be detected, marking the liquid cooling heat dissipation products as current liquid cooling heat dissipation products, and setting unique identification numbers for each liquid cooling heat dissipation product to be detected;
s2: acquiring the liquid passing index requirement, the structural characteristics, the welding method and the welding position of a liquid cooling heat dissipation product to be detected, and generating a detection item and a qualification criterion;
analyzing the box body to obtain the liquid passing index requirement, the structural characteristics, the welding method and the welding position of the box body, and setting detection items and qualification criteria;
specifically, according to the qualification criterion in the detection step, according to the liquid passing index of the box body, the analysis setting is carried out on the appearance (including post-welding and post-finishing) quality of the welding seam, the internal quality (including post-welding rate, welding defect position and size) of the welding seam, the internal sealing performance, the flow resistance performance and the cyclic pressure impact resistance performance of the welding seam;
according to the structural characteristics, welding method and welding position of the product, ultrasonic C scanning is selected as a nondestructive testing means.
S3: performing first detection on the current liquid cooling heat dissipation product, wherein each detection item of the first detection is provided with a corresponding qualification criterion;
the first detection comprises first appearance detection, sealing detection, first damage-free detection and flow resistance detection.
In this embodiment, before the first detection, it is determined whether a first request label is attached to the current liquid cooling heat dissipation product, if yes, the detection items and the sequence in the first detection are adjusted according to the first request label, and if no, the sequence detection is performed based on the set detection items in the first detection.
First, the first appearance detection is specifically as follows:
placing a box body (blank) to be detected on a detection table, and welding the surface and the peripheral side surfaces of a welding area through a magnification magnifying glass and a searchlight;
the qualification criterion 8 is as follows: the surface which is not processed after welding is not allowed to have overburning and cracks, and the maximum size of the air hole is not more than D 3 mm; through the observation result and the measurement result, if the appearance quality after welding meets the requirement of the qualified criterion 1, the detection of the next step is carried out;
the seal detection is specifically as follows:
and (5) connecting the product into sealing detection equipment for pressure resistance test, and detecting whether the sealing performance is qualified. Based on the characteristics of the product, the product is only provided with the runner and the runner port before welding, and the runner port is provided with the allowance for seal detection after welding to be provided with the internal threads with the same specification which can be tightly assembled with the density detection pipeline, so that a reliable seal detection test is realized in the step.
And (5) connecting the product into sealing detection equipment for pressure resistance test, and detecting whether the sealing performance is qualified. Based on the structural characteristics of the product, the product only processes the characteristics of the flow passage and the flow passage opening before welding, and the residual amount of the flow passage opening is processed into the internal threads with the same specification which can be tightly assembled with the density detection pipeline by the seal detection after butt welding, so that a reliable seal detection test is realized in the step.
The qualification criterion 9 is as follows: after one runner port is connected to a pipeline of the sealing detection equipment, the other runner port is plugged by a threaded plug with a sealing ring, and the pressure P is tested 5 MPa, test time t 3 The product should not leak or bulge after an hourAnd (5) deforming.
And setting a seal detection parameter according to the qualification criterion 9, immersing the product in clean deionized water, observing whether leakage bubbles and bulge deformation occur or not, and finding that the product does not generate the phenomena until the test is completed, so that the requirement of the qualification criterion 9 is met, and the next step of detection can be performed.
The first nondestructive detection is specifically as follows:
in this embodiment, the first nondestructive detection is performed by using ultrasonic C-scan;
the qualification criterion 10 is: the welding rate reaches w 7 In the range of the scanning detection resolution, no visible unwelded defects are allowed, i.e. unwelded parts that the device can detect;
specifically, the runner port of the product is plugged by a special plugging adhesive tape, and the product is placed into a deionized water tank of ultrasonic C scanning equipment, so that the product is ensured to be completely immersed, and then the interior of a welding line is detected; the thinner side of the welded part faces upwards during detection, and the selected frequency is f 3 Setting ultrasonic C scanning surface detection parameters including a scanning water distance h 3 mm, scanning speed v 3 m/s, reflection amplitude threshold w 6 And (7) setting initial coordinates and end coordinates, and starting scanning.
And analyzing the scanned image according to the qualification criterion 10, calculating the welding rate, the defect size and the position information, and if the requirements of the criterion 10 are met, performing nondestructive detection to be qualified and performing detection of the next step.
The seal detection is specifically as follows:
the qualification criterion 11 is: at rated flow rate J 2 Under the condition of L/min, leading liquid t 4 The flow resistance test value was P for hours 6 ～P 7 And the two are qualified.
Specifically, the product is connected into a flow resistance detection device to carry out a flow resistance test, and whether the flow resistance performance is qualified is detected. Similarly, the threads of the product at the two runner ports are utilized to connect the two runner ports to the flow resistance detection pipeline, so as to form a liquid passage loop.
And setting flow resistance detection parameters according to the qualification criterion 4, recording a flow resistance test value, and if the flow resistance test value meets the requirement of the qualification criterion 4, detecting the flow resistance to be qualified and carrying out the detection of the next step.
S4: acquiring a welding mode of a current liquid cooling heat dissipation product, classifying detection tags, and judging whether the current liquid cooling heat dissipation product needs to be subjected to second detection or not;
and each detection item of the second detection is provided with a corresponding qualification criterion.
In this embodiment, the product needs to be finished, all the remaining margins after welding are removed, and the features of each part are processed to meet the drawing requirements, so that the finished detection, namely the second detection, needs to be performed.
In this embodiment, the second detection includes a second appearance detection, a second nondestructive detection, a cyclic pressure detection, and a sealing detection;
before second detection, judging whether a second requirement label is attached to the current liquid cooling heat dissipation product, if yes, adjusting detection items and sequence in the second detection according to the second requirement label, and if not, detecting the sequence based on the set detection items in the second detection.
First, the second appearance detection is specifically as follows:
and (3) placing the box body after finish machining on a detection table, and detecting the surface of the welded seam after machining through a multiple magnifying glass and a searchlight.
The qualification criteria 12 are: the surface of the weld after finishing is not allowed to have cracks and air holes.
Through the observation result and the measurement result, if the appearance quality after welding meets the requirement of the qualification criterion 12, the next detection step can be performed.
The second nondestructive testing is specifically as follows:
in this embodiment, the second nondestructive detection is performed by using ultrasonic C-scan;
the qualification criterion 13 is: within the sweep detection resolution range, no visible unwelded defects are allowed.
Specifically, the finished product runner port is specially usedPlugging by using a plugging adhesive tape, placing the plugging adhesive tape into a deionized water tank of ultrasonic C scanning equipment to ensure that the product is completely immersed, then detecting the inside of a welding seam, and selecting the frequency as f 4 Setting ultrasonic C scanning surface detection parameters including a scanning water distance h 4 mm, scanning speed v 4 m/s, then setting initial coordinates and end coordinates, and starting scanning.
Based on the scanned image analysis defect size and position information, if the scanned image analysis defect size and position information meet the requirements of the qualification criterion 13, the step is qualified, and the next detection step can be performed.
The circulating pressure detection is specifically as follows:
the qualification criteria 14 are: in the pressure cycle of 0Mpa to P 8 At Mpa-0 Mpa, the rate is not less than C 3 Secondary/min, co-proceeding C 4 And the secondary pressure circulation, no liquid leakage and no deformation are caused in the testing process and after the completion.
Specifically, the finished product is connected into the circulating pressure detection equipment, two pipeline ports are connected into the circulating pressure test adapter tool, and the other end of the tool is connected into the detection pipeline, so that a liquid-passing loop is formed.
And (3) setting a circulating pressure detection parameter according to a qualification criterion 14, judging whether the product leaks or deforms, and if the product is tested to be finished, detecting the product to be qualified, and carrying out the next detection step.
The seal detection is specifically as follows:
the qualification criterion is the same as the qualification criterion of the seal detection in the first detection step;
specifically, the finished product is connected to a seal detection device, one runner port is connected to a seal adapter tool, the other runner port is plugged by a threaded plug with a sealing ring after the other end of the tool is connected to a pipeline of the seal detection device; if the product has no phenomenon until the test is completed, the step is qualified.
S5: based on the detection flow, when the detection is performed, the next detection item is detected according to the detection sequence if the qualified criterion is met, and when the qualified criterion is met, a qualified label is attached to the current liquid cooling heat dissipation product; in the detection, if the qualified criterion corresponding to the current detection is not met, an unqualified label is attached to the detection item of the current liquid cooling heat dissipation product, and other detection items of the current liquid cooling heat dissipation product are attached to empty labels.
Example 4
Embodiment 4 of the invention discloses a method for detecting welding quality of a liquid cooling heat dissipation product, which is based on the system for detecting welding quality of a liquid cooling heat dissipation product described in embodiment 1, and in this embodiment, an application flow of welding quality detection is described by using a liquid cooling splitter plate welded by an electron beam in a certain electronic device.
As shown in fig. 1 and 4, the specific steps are as follows:
s1: acquiring liquid cooling heat dissipation products to be detected, marking the liquid cooling heat dissipation products as current liquid cooling heat dissipation products, and setting unique identification numbers for each liquid cooling heat dissipation product to be detected;
s2: acquiring the liquid passing index requirement, the structural characteristics, the welding method and the welding position of a liquid cooling heat dissipation product to be detected, and generating a detection item and a qualification criterion;
analyzing the flow dividing plate to obtain the liquid passing index requirement, the structural characteristics, the welding method and the welding position of the flow dividing plate, and setting detection items and qualification criteria;
specifically, according to the qualification criterion in the detection step, according to the liquid passing index of the flow dividing plate, the analysis setting is carried out on the appearance (including post-welding and post-finish machining) quality of the welding seam, the internal quality (including post-welding rate, welding defect position and size) of the welding seam, the internal sealing performance, the flow resistance performance and the cyclic pressure impact resistance performance of the welding seam;
according to the structural characteristics, welding method and welding position of the product, X-ray is selected as a nondestructive testing means.
S3: performing first detection on the current liquid cooling heat dissipation product, wherein each detection item of the first detection is provided with a corresponding qualification criterion;
the first detection comprises first appearance detection, sealing detection, first damage-free detection and flow resistance detection.
In this embodiment, before the first detection, it is determined whether a first request label is attached to the current liquid cooling heat dissipation product, if yes, the detection items and the sequence in the first detection are adjusted according to the first request label, and if no, the sequence detection is performed based on the set detection items in the first detection.
First, the first appearance detection is specifically as follows:
placing a splitter plate to be detected on a detection table, observing an external weld joint through a multiple magnifying glass and a searchlight, observing the inner surface of a runner through an endoscope, and recording a detection image result;
the qualification criteria 15 are: the surface of the welding line is not allowed to be provided with cracks, air holes, weld flash, incomplete penetration, incomplete fusion and secondary welding line, and the surface collapse depth is not more than h 5 mm; through the observation result and the measurement result, if the appearance quality after welding meets the requirement of the qualified criterion 15, the detection of the next step is carried out;
the seal detection is specifically as follows:
and (5) connecting the product into sealing detection equipment for pressure resistance test, and detecting whether the sealing performance is qualified.
The qualification criteria 16 are: after one runner port is connected into a pipeline of the sealing detection equipment, the other runner port is plugged by adopting a rectangular plugging cover with a sealing ring, and the pressure P is tested 9 MPa, test time t 5 The product should not leak, bulge or deform after an hour.
And setting a seal detection parameter according to the qualification criterion 16, immersing the product in clean deionized water, observing whether leakage bubbles and bulge deformation occur or not, and finding that the product does not generate any phenomena until the test is completed, so that the requirement of the qualification criterion 16 is met, and the next step of detection can be performed.
The first nondestructive detection is specifically as follows:
in this embodiment, the first nondestructive detection uses X-rays for detection;
the qualification criterion 17 is: the weld joint has no cracks and no fusion, and the maximum size of the air holes or inclusions is not more than D 4 Between defectsThe minimum spacing does not exceed delta defect diameters (calculated as larger size) and the number of defects per x mm length does not exceed s.
Specifically, the runner port of the product is plugged by a special plugging adhesive tape, an image quality meter is stuck, the product is placed on a searchlight table of an X-ray detection device, a weld to be detected is perpendicular to the X-ray searchlight direction, the weld is ensured to have no overlapping weld and other size characteristic interference in the searchlight direction, a detection window is closed, detection parameters (including voltage, current, focal point size and the like) are set, DR imaging detection is started, and the searchlight position is moved or a splitter plate is moved and rotated for multiple times according to the space positions of different weld.
And (3) analyzing the DR imaged weld image according to a qualification criterion 17, and if the DR imaged weld image meets the requirement of criterion 3, performing nondestructive detection to be qualified and performing detection of the next step.
In practice, if the detectable welding lines are found to meet the requirements, but the situation that the detection direction of the local welding lines is overlapped and is interfered by other dimensional characteristics exists, whether the quality of the welding lines meets the requirements of a qualified criterion 17 cannot be accurately judged, accurate CT three-dimensional space imaging is needed to be carried out, and further detection is carried out; namely, the DR imaging can not detect and accurately judge the weld joint quality of the weld joint to calibrate, the weld joint is put on a searchlight table of the X-ray detection equipment again, the detection window is closed, detection parameters (including voltage, current, scanning range and the like) are reset, the CT imaging weld joint image is subjected to slice analysis, the weld joint which can not detect and accurately judge the weld joint quality is subjected to quantitative analysis, the detection results are found to meet the requirements of the qualification criterion 17, and the DR and CT detection results are combined, so that the X-ray detection results meet the requirements, and the next detection step can be carried out.
The circulating pressure detection is specifically as follows:
the qualification criteria 18 are: in the pressure cycle of 0Mpa to P 10 At Mpa-0 Mpa, the rate is not less than C 5 Secondary/min, co-proceeding C 6 And the secondary pressure circulation, no liquid leakage and no deformation are caused in the testing process and after the completion.
Specifically, the product is connected to the circulating pressure detection equipment, two fluid passage ports are connected to the liquid cooling special connector, and the other end of the connector is connected to the detection pipeline to form a liquid passage loop.
And (3) setting a circulating pressure detection parameter according to a qualification criterion 18, judging whether liquid leakage and deformation occur, and if the product is completely tested, detecting the product to be qualified in the step.
S5: based on the detection flow, when the detection is performed, the next detection item is detected according to the detection sequence if the qualified criterion is met, and when the qualified criterion is met, a qualified label is attached to the current liquid cooling heat dissipation product, and the qualified product is turned down; in the detection, if the qualified criterion corresponding to the current detection is not met, an unqualified label is attached to the detection item of the current liquid cooling heat dissipation product, and other detection items of the current liquid cooling heat dissipation product are attached to empty labels.
The invention is not limited to the specific embodiments described above. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.
Claims (10)
1. The detection system for the welding quality of the liquid cooling heat dissipation product is characterized by comprising a main control unit, a transmission unit and a detection unit, wherein the main control unit comprises an index setting module and a product characteristic input module; the detection unit is connected with the transmission unit; the main control unit is connected with the detection unit and is used for data synchronization;
the main control unit is used for generating detection items associated with each liquid cooling heat dissipation product to be detected and transmitting data to each related detection unit;
the conveying unit is used for conveying the liquid cooling heat dissipation products to be detected to different detecting units according to the parameters set by the main control unit to carry out corresponding detection;
the detection unit is used for detecting the currently received liquid cooling heat dissipation product according to the qualification criterion;
the index setting module is used for setting qualified criteria corresponding to each detection item and transmitting the qualified criteria to the corresponding detection unit;
the product characteristic input module is used for inputting structural characteristics, welding methods and welding positions, selecting a scanning mode according to the structural characteristics, the welding methods and the welding positions and transmitting the scanning mode to the corresponding detection units.
2. The system for detecting welding quality of a liquid-cooled heat sink product according to claim 1, wherein the index setting module comprises a custom mode and a selection mode;
the custom mode is used for newly adding a qualified criterion, correspondingly setting a qualified parameter threshold value, and setting detection items and sequences;
the selection mode is used for selecting a generated detection flow containing a plurality of detection items and a correspondingly set qualified criterion stored in the system, and selecting a parameter threshold corresponding to the set qualified criterion;
all the qualified criteria set by the index setting module are associated and correspond to the liquid cooling heat dissipation products to be detected currently.
3. The system for detecting the welding quality of the liquid cooling heat dissipation product according to claim 1, wherein the detecting unit is provided with an external display screen for displaying and outputting detection data corresponding to the current liquid cooling heat dissipation product, and the detection data comprises a unique identification number and a qualification criterion of the liquid cooling heat dissipation product.
4. The system for detecting welding quality of a liquid-cooled heat sink product according to claim 3, wherein the detection data further comprises structural characteristics, welding methods and welding positions corresponding to the current liquid-cooled heat sink product.
5. The system for detecting welding quality of liquid-cooled heat sink products of claim 1, wherein the scanning mode comprises ultrasonic C-scan and X-ray scan.
6. A method for detecting welding quality of a liquid cooling heat dissipation product, which is characterized by comprising the following steps based on the detection system of welding quality of the liquid cooling heat dissipation product as claimed in any one of claims 1-5:
s1: acquiring liquid cooling heat dissipation products to be detected, and recording the liquid cooling heat dissipation products as current liquid cooling heat dissipation products, wherein each liquid cooling heat dissipation product to be detected is provided with a unique identification number;
s2: acquiring the liquid passing index requirement, the structural characteristics, the welding method and the welding position of a liquid cooling heat dissipation product to be detected, and generating a detection item and a qualification criterion;
s3: performing first detection on the current liquid cooling heat dissipation product, wherein each detection item of the first detection is provided with a corresponding qualification criterion;
s4: acquiring a welding mode of a current liquid cooling heat dissipation product, classifying detection tags, and judging whether the current liquid cooling heat dissipation product needs to be subjected to second detection or not;
each detection item of the second detection is provided with a corresponding qualification criterion;
s5: when the detection is carried out, the next detection item is detected according to the detection sequence when the qualification criteria are met, and when all the qualification criteria are met, a qualified label is attached to the current liquid cooling heat dissipation product, and the qualified product is transferred downwards; in the detection, if the qualified criterion corresponding to the current detection is not met, an unqualified label is attached to the detection item of the current liquid cooling heat dissipation product, and other detection items of the current liquid cooling heat dissipation product are attached to empty labels.
7. The method of claim 6, wherein the first inspection includes a first appearance inspection, a seal inspection, a first damage-free inspection, and a flow resistance inspection.
8. The method for detecting welding quality of a liquid cooling heat dissipation product according to claim 7, wherein before performing the first detection, it is determined whether a first request label is attached to the current liquid cooling heat dissipation product, if so, the detection items and the sequence in the first detection are adjusted according to the first request label, and if not, the sequence detection is performed based on the set detection items in the first detection.
9. The method of claim 6, wherein the second inspection comprises a second appearance inspection, a second non-destructive inspection, a cyclic pressure inspection, and a sealing inspection.
10. The method for detecting welding quality of liquid cooling heat dissipation products according to claim 9, wherein before performing the second detection, judging whether the second requirement label is attached to the current liquid cooling heat dissipation product, if yes, adjusting the detection items and the sequence in the second detection according to the second requirement label, and if not, performing the sequence detection based on the set detection items in the second detection.
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| CN202310843446.XA CN116698131A (en) | 2023-07-11 | 2023-07-11 | Detection system and method for welding quality of liquid cooling heat dissipation product |
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| CN202310843446.XA CN116698131A (en) | 2023-07-11 | 2023-07-11 | Detection system and method for welding quality of liquid cooling heat dissipation product |
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