CN117074182B - Method for preventing copper wire breakage self-detection of intelligent bonding copper wire guide stretching device - Google Patents

Method for preventing copper wire breakage self-detection of intelligent bonding copper wire guide stretching device Download PDF

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Publication number
CN117074182B
CN117074182B CN202311340345.7A CN202311340345A CN117074182B CN 117074182 B CN117074182 B CN 117074182B CN 202311340345 A CN202311340345 A CN 202311340345A CN 117074182 B CN117074182 B CN 117074182B
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tension
value
copper wire
index
determining
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CN117074182A (en
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李盛伟
李妍琼
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Shenzhen Zhongbao New Material Technology Co ltd
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Shenzhen Zhongbao New Material Technology Co ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
    • H01L22/10—Measuring as part of the manufacturing process
    • H01L22/12—Measuring as part of the manufacturing process for structural parameters, e.g. thickness, line width, refractive index, temperature, warp, bond strength, defects, optical inspection, electrical measurement of structural dimensions, metallurgic measurement of diffusions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
    • H01L22/20—Sequence of activities consisting of a plurality of measurements, corrections, marking or sorting steps
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0017—Tensile

Abstract

The application discloses a method for preventing copper wire breakage self-checking of an intelligent bonding copper wire guide stretching device, which relates to the technical field of intelligent control and is used for timely regulating and controlling breakage risk in the bonding copper wire stretching process; the method comprises the following steps: in each drawing operation for the initially bonded copper wire: stretching the current bonding copper wire at the current stretching speed by a stretching device to obtain an intermediate bonding copper wire; determining a tension deviation index according to a current tension value measured for the stretching device, determining a Young modulus deviation index according to a current Young modulus detected for the middle bonding copper wire, determining the sum of the tension deviation index and the Young modulus deviation index as a fracture risk index, and adjusting the current stretching speed according to the fracture risk index when the fracture risk is determined to exist based on the fracture risk index.

Description

Method for preventing copper wire breakage self-detection of intelligent bonding copper wire guide stretching device
Technical Field
The application relates to the technical field of intelligent control, in particular to a method for preventing copper wire breakage self-inspection of an intelligent bonding copper wire guide stretching device.
Background
In the electronic manufacturing industry, the bonding copper wire is a product for replacing gold wire, and production equipment (protective gas is required to be added for preventing oxidation during welding) is not required to be replaced by the bonding copper wire, so that physical and mechanical performance indexes are equal to or better than those of gold wire, and the product cost can be greatly reduced; the bonding copper wire is mainly applied to various semiconductor devices such as transistors, integrated circuits, large-scale integrated circuits and the like as an inner lead wire and used for packaging various electronic components such as diodes, triodes, integrated circuits, large-scale integrated circuits, IC cards and the like; the bonding copper wire can be applied to the microelectronic industry and used for connecting chips and external circuits, such as discrete devices and integrated circuits; however, the bonding copper wire (also called as bonding copper wire guide) is easy to break in the stretching process, so that the production efficiency is reduced and the cost is increased, and therefore, how to monitor and automatically regulate the breaking of the bonding copper wire in the stretching process becomes a problem to be solved urgently.
Disclosure of Invention
The application provides a method for preventing copper wire breakage self-checking of an intelligent bonding copper wire guide stretching device, which is used for providing a method for detecting the risk of stretching breakage of bonding copper wires and intelligently and automatically regulating and controlling breakage prevention.
In a first aspect, the present application provides a method for controlling stretch breaking prevention of a bonded copper wire, the method comprising:
acquiring an initial image by aiming at an initial bonding copper wire placed in a material guiding area, and judging whether the initial bonding copper wire has defects or not based on the initial image; and in response to the initial bond wire being defect-free, performing at least one drawing operation on the initial bond wire, wherein the (i+1) th drawing operation comprises:
determining the current stretching speed of a stretching device, stretching the current bonding copper wire to a stretching area for a target time period at the current stretching speed by the stretching device to obtain an intermediate bonding copper wire, and fixing the intermediate bonding copper wire by a fixer; i is an integer not less than 0, wherein when i is 0, the current stretching speed is the initial stretching speed, and the current bonding copper wire is the initial bonding copper wire; when i is greater than 0, the current stretching speed is the target stretching speed determined by the ith stretching operation, and the current bonding copper wire is an intermediate bonding copper wire obtained by the ith stretching operation;
measuring a current tension value of the stretching device through a tension sensor, and determining a tension deviation index according to the ratio of the current tension value to a reference tension value, wherein the tension deviation index and the fracture risk of the middle bonding copper wire are positively correlated;
Detecting the current Young's modulus of the intermediate bonding copper wire by a Young's measuring instrument, and determining a Young's modulus deviation index according to the ratio of the current Young's modulus to a reference Young's modulus, wherein the Young's modulus deviation index and the tensile elasticity of the intermediate bonding copper wire are positively correlated;
determining the sum of the tensile force deviation index and the Young's modulus deviation index as a fracture risk index;
if the fracture risk index is greater than or equal to the first risk index threshold, determining that the middle bonding copper wire has fracture risk, and adjusting the current stretching speed according to the fracture risk index to obtain a target stretching speed; if the fracture risk index is smaller than the first risk index threshold, determining that the middle bonding copper wire does not have fracture risk, and determining the current stretching speed as the target stretching speed.
In one possible implementation manner, the background plate of the material guiding area is a designated color, the background of the area except for the initial bonding copper wire in the initial image is a designated color, and the method for judging whether the initial bonding copper wire has a defect based on the initial image comprises the following steps:
extracting an initial bonding copper wire from the initial image through a mask technology, and obtaining a reconstructed copper wire image by targeting the extracted bonding copper wire to a preset background image;
Determining a copper wire morphology feature value based on morphology features of the initial bonding copper wire in the reconstructed copper wire image;
if the morphological characteristic value of the copper wire is larger than the morphological characteristic threshold value, judging that the initial bonding copper wire has defects; if the morphological characteristic value of the copper wire is smaller than or equal to the morphological characteristic threshold value, judging that the initial bonding copper wire has no defect.
In one possible implementation manner, after determining whether the initial bonding copper wire has a defect based on the initial image, the method further includes:
determining the type of copper wire defects of the initial bonding copper wire based on morphological characteristics of the initial bonding copper wire in the reconstructed copper wire image;
the type of copper wire defect is marked in the initial image to inform the recovery of the initial bonded copper wire.
In one possible implementation manner, after determining whether the initial bonding copper wire has a defect based on the initial image, before performing at least one stretching operation on the initial bonding copper wire, the method further includes:
detecting a tension value sequence of the guide shaft in a first period of time through a tension sensor in response to the fact that the initial bonding copper wire is free of defects;
determining the average value of the tension values in the tension value sequence as a current tension value, and acquiring a reference tension value of the material guiding shaft, wherein the reference tension value is the tension value when the material guiding shaft is in a normal working state;
Determining the ratio of the current tension value to the reference tension value as a tension deviation value;
if the tension deviation value is larger than the first tension threshold value and smaller than the second tension threshold value, determining that the material guide shaft is in a normal working state, wherein the first tension threshold value is smaller than the second tension threshold value;
if the tension deviation value is smaller than the first tension threshold value or larger than the second tension threshold value, determining that the material guiding shaft is in an abnormal state, determining azimuth information of the material guiding shaft, and replacing the material guiding shaft according to the azimuth information through an automatic replacement device.
In one possible implementation manner, after determining whether the initial bonding copper wire has a defect based on the initial image, before performing at least one stretching operation on the initial bonding copper wire, the method further includes:
in response to the defect of the initial bonding copper wire, detecting the rotating speed of the material guiding shaft at M moments in a second period of time through a rotating speed sensor, and determining the ratio of the minimum value to the maximum value in the rotating speeds at M moments as a first rotating speed deviation value;
if the first rotational speed deviation value is smaller than the first rotational speed threshold value, determining that the rotational speed of the material guide shaft is abnormal, and adjusting the rotational speed of the material guide shaft based on the first rotational speed deviation value;
if the first rotation speed deviation value is greater than or equal to the first rotation speed threshold value, determining that the rotation speed of the material guide shaft is normal, acquiring a reference rotation speed, determining an average value of the rotation speeds at M moments as a current rotation speed, and determining a ratio of the current rotation speed to the reference rotation speed as a second rotation speed deviation; the reference rotating speed is the rotating speed of the material guiding shaft in a normal working state;
If the second rotational speed deviation is smaller than or equal to the second rotational speed threshold value, determining the rotational speed deviation index as the first rotational speed index; if the second rotational speed deviation is greater than the second rotational speed threshold and less than or equal to the third rotational speed threshold, determining the rotational speed deviation index as a second rotational speed index; if the second rotation speed deviation is greater than or equal to the third rotation speed threshold value, determining the rotation speed deviation index as the third rotation speed index, suspending the work of the material guiding shaft, and performing rotation speed adjustment on the material guiding shaft based on the second rotation speed deviation value; the third rotation speed index, the second rotation speed index and the first rotation speed index are sequentially reduced, and the second rotation speed threshold value is smaller than the third rotation speed threshold value.
In one possible implementation manner, determining a current stretching speed of the stretching device, stretching the current bonding copper wire towards a stretching area by the stretching device at the current stretching speed for a target time to obtain an intermediate bonding copper wire, and after fixing the intermediate bonding copper wire by the fixing device, measuring a current tension value of the stretching device by the tension sensor, and further comprising:
detecting N pressure values at different positions of the fixer through a pressure sensor, and determining the ratio of the minimum value to the maximum value in the N pressure values as a first pressure deviation value, wherein N is an integer greater than 1;
If the first pressure deviation value is smaller than the first pressure threshold value, determining that the fixer is abnormal, and fixing the middle bonding copper wire through the standby fixer;
if the first pressure deviation value is greater than or equal to the first pressure threshold value, determining that the fixator is normal, determining an average value of N pressure values as a current pressure value, and determining a ratio of the current pressure value to a reference pressure value as a second pressure deviation value; the reference pressure value is the pressure value when the fixer is normal;
if the second pressure deviation value is greater than or equal to a second pressure threshold value, determining that the pressure of the fixator is normal;
if the second pressure deviation value is smaller than the second pressure threshold value, the pressure of the fixer is determined to be too low, and the power of the fixer is adjusted according to the second pressure deviation value.
In one possible implementation, determining the tension deviation index from the ratio of the current tension value to the reference tension value includes:
determining the ratio of the current tension value to the reference tension value as a tension deviation value;
if the tension deviation value is smaller than or equal to the first tension threshold value, determining the tension deviation index as a first tension index;
if the tension deviation value is larger than the first tension threshold value and smaller than or equal to the second tension threshold value, determining that the tension deviation index is the second tension index;
If the tension deviation value is larger than the second tension threshold value and smaller than or equal to the third tension threshold value, determining that the tension deviation index is the third tension index;
if the tension deviation value is larger than the third tension threshold value, determining that the tension deviation index is a fourth tension index, suspending the operation of the stretching device, and sending a maximum fracture risk prompt to a control end;
the first tension threshold value, the second tension threshold value and the third tension threshold value are sequentially increased; the first tension index, the second tension index, the third tension index and the fourth tension index are sequentially increased.
In one possible implementation, determining the young's modulus deviation index from the ratio of the current young's modulus to the reference young's modulus includes:
determining the ratio of the current Young's modulus and the reference Young's modulus as a modulus deviation value;
if the modulus deviation value is less than or equal to the first modulus threshold value, determining the Young's modulus deviation index as a first Young's modulus index;
if the modulus deviation value is greater than the first modulus threshold value and less than the second modulus threshold value, determining that the Young's modulus deviation index is the second Young's modulus index;
if the modulus deviation value is greater than or equal to the second modulus threshold value, determining the Young's modulus deviation index as a third Young's modulus index;
Wherein the first modulus threshold is less than the second modulus threshold; the first Young's modulus index, the second Young's modulus index, and the third Young's modulus index increase in order.
In a second aspect, an embodiment of the present application further provides a device for preventing copper wire breakage self-checking of an intelligent bonding copper wire guide stretching device, where the device includes a processor and a memory, the memory is configured to store a program executable by the processor, and the processor is configured to read the program in the memory and execute any method of the first aspect of the present application.
In a third aspect, embodiments of the present application also provide a computer storage medium having stored thereon a computer program for carrying out the steps of the method of the first aspect described above when executed by a processor.
In the embodiment of the application, the process of stretching the bonding copper wire through the stretching device is divided into multiple stretching operations, the current tension condition (namely the tension deviation index) of the stretching device is detected in each stretching operation, the stretching elasticity (namely the Young modulus deviation index) of the bonding copper wire in stretching is detected, the fracture risk index of the bonding copper wire in stretching is comprehensively judged based on the current tension condition of the stretching device and the stretching elasticity of the bonding copper wire in stretching, and the stretching speed of the stretching device is timely adjusted according to the current fracture risk index when the fracture risk is high so as to avoid fracture of the bonding copper wire in stretching; in the process of stretching the bonding copper wire, the breaking risk of the bonding copper wire in stretching can be timely detected, and the stretching speed can be timely regulated and controlled when the breaking risk of the bonding copper wire is high, so that the bonding copper wire is prevented from breaking in the stretching process.
These and other aspects of the present application will be more readily apparent from the following description of the embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for self-checking copper wire breakage prevention of an intelligent bonding copper wire guide stretching device according to an embodiment of the present application;
fig. 2 is a block diagram of an apparatus for self-checking the breakage of copper wire of an intelligent bonding copper wire guide stretching device.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings, wherein it is apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the embodiment of the application, the term "and/or" describes the association relationship of the association objects, which means that three relationships may exist, for example, a and/or B may be represented: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
The application scenario described in the embodiments of the present application is for more clearly describing the technical solution of the embodiments of the present application, and does not constitute a limitation on the technical solution provided in the embodiments of the present application, and as a person of ordinary skill in the art can know that, with the appearance of a new application scenario, the technical solution provided in the embodiments of the present application is also applicable to similar technical problems. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
First, key technical words related to the embodiments of the present application are described:
the edges of an image are where the pixels of the image change rapidly, and the edges of the image do not correspond to the boundaries of objects in the image. Edges refer to places in the image where there is abrupt change in the values of pixels, while boundaries between objects refer to boundaries that exist between objects in a real scene. It is possible that the places with edges are not boundaries, nor that the places with edges are not boundaries, because the real world objects are three-dimensional, while the image has only two-dimensional information, projection imaging from three-dimensional to two-dimensional inevitably loses a part of the information; in addition, illumination and noise during imaging are also important factors that are unavoidable.
Canny edge detection is a multi-step algorithm for detecting the edges of any input image. It involves the following steps to be followed in detecting an image edge: a) Smoothing and filtering the image; b) Calculating the gradient and direction of the image; c) The point with the maximum local gradient is kept through non-maximum value inhibition, and a thinned edge is obtained; d) Detecting real and potential edges through double threshold values to form an edge image;
tension sensor: the tension sensor is an instrument for measuring the tension value in the tension control process, when the tension sensor is subjected to external pressure, the resistance value of the strain gauge also changes, and the change value is directly proportional to the tension.
Tension sensor: the detection principle of the tension sensor is that the elastic body/elastic element/sensitive beam generates elastic deformation under the action of external force, so that the resistance strain gauge/conversion element stuck on the surface of the elastic body/elastic element/sensitive beam also generates deformation along with the elastic deformation, after the resistance strain gauge deforms, the resistance value of the resistance strain gauge changes (increases or decreases), and the resistance change is converted into an electric signal (voltage or current) through a corresponding measuring circuit, thereby completing the process of converting the external force into the electric signal.
Young's modulus measuring instrument: the device is an instrument for measuring the relation between the section deformation of a material and external force by carrying out a tensile or compression test on the material; the working principle is based on hooke's law, i.e. stress and strain become proportional. When a tensile or compressive test is performed on a material on a young's modulus meter, the meter records the acquired stress and strain data, thereby calculating the young's modulus of the material.
Young's modulus is the modulus of elasticity in the machine direction and is also a term in the mechanics of materials. 1807 was named for the results obtained by the UK doctor and physicist ThomasYoung, 1773-1829. According to hooke's law, within the elastic limit of an object, the stress is proportional to strain, the ratio is called the young's modulus of the material, which is a physical quantity characterizing the properties of the material, the magnitude of the young's modulus marks the rigidity of the material, and the larger the young's modulus, the less likely deformation will occur. A low young's modulus value indicates that the solid is elastic and a high young's modulus value indicates that the solid is inelastic or hard.
The embodiment of the application provides a self-checking method for preventing copper wire breakage of an intelligent bonding copper wire guide drawing device, which divides the process of drawing bonding copper wires into a plurality of drawing operations, detects the current tension deviation index of the drawing device in each drawing operation, detects the current Young modulus deviation index of the bonding copper wires in drawing, comprehensively judges the breakage risk index of the bonding copper wires in drawing based on the tension deviation index of the drawing device and the Young modulus index of the bonding copper wires in drawing, and timely adjusts the drawing speed of the drawing device according to the current breakage risk index when the breakage risk is high so as to avoid breakage of the bonding copper wires in drawing; in the process of stretching the bonding copper wire, the breaking risk of the bonding copper wire in stretching can be timely detected, and the stretching speed can be timely regulated and controlled when the breaking risk of the bonding copper wire is high, so that the bonding copper wire is prevented from breaking in the stretching process.
The method for preventing the copper wire breakage self-inspection of the intelligent bonding copper wire guide stretching device can be applied to a copper wire guide stretching system, such as a control end of the copper wire guide stretching system or a stretching device.
As an embodiment, the copper wire guide stretching system in the embodiment of the application may include, but is not limited to, a guide area, a stretching device, a guide shaft, a fixture and a standby fixture, a tension sensor, a young measuring instrument, an image sensor, and a control end; wherein:
the material guiding area is used for placing the initial bonding copper wire before stretching, and the stretching area refers to an area where the bonding copper wire is prolonged after the initial bonding copper wire is stretched; the stretching device is used for stretching the initial bonding copper wire and the middle bonding copper wire; the guide shaft is used for guiding the initial bonding copper wire; the fixture is used for fixing the intermediate bond obtained by each stretching operation, and the standby fixture is used for replacing the current fixture when the current fixture is abnormal; the tension sensor is used for detecting the tension value of the material guiding shaft; the tension sensor is used for measuring the tension value of the stretching device; the Young's measuring instrument is used for detecting Young's modulus of the initial bonding copper wire and the intermediate bonding copper wire obtained through each stretching operation; the image sensor is used for collecting images aiming at the material guiding area; the control end is used for executing the method of preventing the copper wire breakage self-checking of the intelligent bonding copper wire guide stretching device, the control end can be a processor arranged in the stretching device, the control end can also be an independent physical server or server system (such as a control end of an APP, a cloud platform, a distributed platform and the like), the control end can also be an Internet of things control end and the like, and a person skilled in the art can set the control end according to actual requirements.
Referring to fig. 1, a flow chart of a method for preventing a copper wire from breaking and self-checking by an intelligent bonding copper wire guide stretching device provided in an embodiment of the present application specifically includes the following steps:
step S100, acquiring an initial image by aiming at an initial bonding copper wire placed in a material guiding area, and judging whether the initial bonding copper wire has defects or not based on the initial image; and performing at least one drawing operation on the initial bonding copper wire in response to the initial bonding copper wire being free of defects, wherein the (i+1) th drawing operation includes steps S110 to S170.
Step S110, determining the current stretching speed of the stretching device, stretching the current bonding copper wire to a stretching area for a target time period at the current stretching speed by the stretching device to obtain an intermediate bonding copper wire, and fixing the intermediate bonding copper wire by a fixer.
It should be noted that, the above i is an integer not less than 0, and when i is 0, the current 1 st drawing operation is characterized in that the current bonding copper wire in the 1 st drawing operation is an initial bonding copper wire, and the preset initial drawing speed is determined as the current drawing speed of the drawing device in the 1 st drawing operation, wherein the initial drawing speed can be set by a person skilled in the art based on experience; and when i is greater than 0, representing that 1 or more stretching operations are performed at present, wherein the current bonding copper wire in the (i+1) th stretching operation is the intermediate bonding copper wire obtained by the (i) th stretching operation, and determining the target stretching speed determined by the (i) th stretching operation as the current stretching speed.
As an embodiment, it is also possible to determine whether the current holder is abnormal by detecting the pressure value of the holder after step S110 before step S120, and to activate the standby holder in case of the abnormality of the current holder, specifically: n pressure values of different positions of the fixer are detected through the pressure sensor, the ratio of the minimum value to the maximum value in the N pressure values is determined to be a first pressure deviation value, and whether the fixer is abnormal is judged based on the condition of the first pressure deviation value, wherein N is an integer greater than 1, if N can be set to 2, and then the pressure values of the upper part and the lower part of the fixer are detected, N can also be set to 6, and then the pressure values of 6 different positions of the fixer are detected.
Further, when the first pressure deviation value is smaller than a first pressure threshold value, determining that the fixer is abnormal, and fixing the middle bonding copper wire through the standby fixer; when the first pressure deviation value is greater than or equal to a first pressure threshold value, determining that the fixer is normal, and further detecting and verifying whether the fixer is normal or not; the specific value of the first pressure threshold is not limited, and a person skilled in the art may set the specific value according to actual needs, for example, but not limited to, setting the first pressure threshold to 85% or 80% or the like.
Specifically, in the process of detecting and verifying the fixator, the average value of the N pressure values can be determined as a current pressure value, the ratio of the current pressure value to the reference pressure value is determined as a second pressure deviation value, and the fixator pressure is determined to be normal when the second pressure deviation value is greater than or equal to a second pressure threshold value; determining that the pressure of the fixator is too low when the second pressure deviation value is smaller than the second pressure threshold value, and adjusting the power of the fixator according to the second pressure deviation value, wherein when the second pressure deviation value is 80%, the power of the fixator can be adjusted by 20% or the like; the specific value of the second pressure threshold is not limited in the embodiment of the present application, and a person skilled in the art may set the second pressure threshold according to actual needs, for example, but not limited to, setting the second pressure threshold to 93% or 90% or the like.
Step S120, measuring the current tension value of the stretching device through the tension sensor, and determining a tension deviation index according to the ratio of the current tension value to the reference tension value, wherein the tension deviation index and the fracture risk of the middle bonding copper wire are positively correlated.
It should be understood that, the reference tension value is a tension value when the stretching device stretches the bonding copper wire normally, in the embodiment of the present application, the rated tension value of the stretching device may be determined as the reference tension value, or K1 historical tension values when the stretching device stretches the bonding copper wire normally in the first historical period may be obtained from the control end or the cloud end, and an average value of the K1 historical tension values is taken as the reference tension value; in addition, in the embodiment of the application, the tension deviation index represents the deviation between the current tension value and the normal tension value (namely, the reference tension value) of the tension device, and whether the current tension value of the tension device is abnormal can be judged based on the tension deviation index.
As an example, in step S120, a ratio of the current tension value and the reference tension value may be determined as a tension deviation value by, but not limited to, the following formula (1);
formula (1)
In the formula (1), T is a tension deviation value of the stretching device, ti is a current tension value of the stretching device, and T0 is a reference tension value of the stretching device.
Further, determining a corresponding tension deviation index based on the value range of the tension deviation value; specifically, when the tension deviation value is smaller than or equal to a first tension threshold value, determining the tension deviation index as a first tension index; when the tension deviation value is larger than the first tension threshold value and smaller than or equal to the second tension threshold value, determining that the tension deviation index is the second tension index; when the tension deviation value is larger than the second tension threshold value and smaller than or equal to the third tension threshold value, determining that the tension deviation index is the third tension index; when the tension deviation value is larger than the third tension threshold value, determining that the tension deviation index is a fourth tension index, determining that the tension is overlarge and abnormal so as to suspend the operation of the stretching device, and sending a maximum fracture risk prompt to a control end; the first tension threshold value, the second tension threshold value and the third tension threshold value are sequentially increased; the first tension index, the second tension index, the third tension index and the fourth tension index are sequentially increased.
In this embodiment of the present application, the specific values of the first tension threshold, the second tension threshold, and the third tension threshold are not excessively limited, and the specific values of the first tension index, the second tension index, the third tension index, and the fourth tension index are not excessively limited, so that a person skilled in the art may set the values according to actual needs, for example, the first tension threshold, the second tension threshold, and the third tension threshold may be set to 120%, 145%, and 165%, respectively, and the first tension index, the second tension index, the third tension index, and the fourth tension index may be set to 1, 2, 3, and 4, respectively; further, when 'T < = 120%' the current tension value is normal, so that the tension deviation index is set to be 1; when "120% < T < = 140%", the current tension value is characterized as slightly higher, thereby setting the tension deviation index to 2; when "145% < T < = 165%", the current tension value is characterized as being higher, thereby setting the tension deviation index to 3; when "165% < T", the present pulling force value of characterization is high, and the pulling force is too big unusual and then pauses stretching device's work to the control end sends very big fracture risk warning to set up the pulling force deviation index to 4.
And S130, detecting the current Young 'S modulus of the intermediate bonding copper wire by a Young' S measuring instrument, and determining a Young 'S modulus deviation index according to the ratio of the current Young' S modulus to a reference Young 'S modulus, wherein the Young' S modulus deviation index and the tensile elasticity of the intermediate bonding copper wire are positively correlated.
It should be understood that, the reference young modulus is the young modulus of the bonding copper wire, and in the embodiment of the application, the reference young modulus can be obtained from the control end or the cloud end; in the embodiment of the application, the Young modulus index represents the deviation between the current Young modulus of the current middle bonding copper wire and the normal Young modulus (namely, the reference Young modulus), and whether the current Young modulus of the middle bonding copper wire is abnormal can be judged based on the Young modulus deviation index.
As an example, in step S130, the ratio of the current young 'S modulus and the reference young' S modulus may be determined as a modulus deviation value by, but not limited to, the following formula (2);
formula (2)
In the formula (2), M is a Young's modulus deviation value, mi is a current Young's modulus, and M0 is a reference Young's modulus.
Further, determining a corresponding Young modulus deviation index based on the value range of the modulus deviation value; specifically: when the modulus deviation value is less than or equal to the first modulus threshold value, determining the young's modulus deviation index as a first young's modulus index; when the modulus deviation value is greater than the first modulus threshold value and less than the second modulus threshold value, determining the Young's modulus deviation index as a second Young's modulus index; when the modulus deviation value is greater than or equal to the second modulus threshold value, determining the young's modulus deviation index as a third young's modulus index; wherein the first modulus threshold is less than the second modulus threshold; the first Young's modulus index, the second Young's modulus index, and the third Young's modulus index increase in order.
In the embodiment of the application, the specific values of the first modulus threshold value and the second modulus threshold value are not excessively limited, and the specific values of the first young modulus index, the second young modulus index and the third young modulus index are not excessively limited, so that a person skilled in the art can set the values according to actual requirements, for example, the first modulus threshold value and the second modulus threshold value can be set to 116% and 148% respectively, and the first young modulus index, the second young modulus index and the third young modulus index can be set to 1, 2 and 3 respectively; further, when 'M < = 116%', the current young's modulus of the intermediate bonding copper wire is characterized as normal, so that the young's modulus deviation index is set to be 1; when "1160% < T <148%", the current young's modulus is characterized to be higher, thereby setting the young's modulus deviation index to 2; when "148% <=t", the current young's modulus is characterized to be high, thereby setting the young's modulus deviation index to 3.
And step S140, determining the sum of the tension deviation index and the Young' S modulus deviation index as a fracture risk index.
As an example, the tensile force deviation index and the young's modulus deviation index may be determined as a fracture risk index by, but not limited to, the principle of the formula (3);
R=a×t+b×m formula (3)
In the formula (3), R is a fracture risk index, T is a tension deviation index, and M is a Young modulus deviation index; a and b are respectively the weighted weights of the tension deviation index and the young's modulus deviation index, and a and b are respectively the values greater than or equal to 0 and less than or equal to 1, and a person skilled in the art can set the values of a and b according to the actual needs, for example, when a and b are respectively set to 1, the fracture risk index is the sum of the tension deviation index and the young's modulus deviation index.
Step S150, judging whether the fracture risk index is greater than or equal to the first risk index threshold, if so, proceeding to step S160, and if not, proceeding to step S170.
As an embodiment, the first risk index threshold may be set according to the values of the tension deviation index and the young's modulus deviation index, and may also be set according to the values of the tension deviation index and the young's modulus deviation index and the values of a and b in the formula (3); to facilitate understanding, a specific example is given herein, in which the first tensile force index, the second tensile force index, the third tensile force index, and the fourth tensile force index in the tensile force deviation index are 1, 2, 3, and 4, respectively, the first young modulus index, the second young modulus index, and the third young modulus index in the young modulus deviation index are 1, 2, and 3, respectively, the fracture risk index is determined based on the formula (3), and the values of a and b in the formula (3) are both 1, the value range of the fracture risk index is an integer of not less than 2 and not more than 7, and further, the first risk index threshold may be set to 2 or 3 or 4, or the like, but not limited thereto.
As an embodiment, in the step S150, the current risk level of the middle bonding copper wire breaking currently may be determined based on the matching relationship between the breaking risk index and the index range corresponding to the non-ventilation risk level, specifically, when the value range of the breaking risk index is an integer of not less than 2 and not more than 7 in the foregoing example, the current risk level of the middle bonding copper wire breaking currently may be determined, but not limited to, according to the following table 1, and the current risk level may be sent to the control end and/or the user APP end, etc.
TABLE 1 matching relationship between the value ranges of fracture risk indexes and the current risk level
Value range of fracture risk index Matching relation of current risk level
R=2 Without risk of breakage
2<R<=4 Low risk of breakage
4<R<=5 Risk of breakage
5<R<=6 High risk of fracture
R=7 Extremely high risk of fracture
Step S160, determining that the intermediate bonding copper wire has fracture risk, adjusting the current stretching speed according to the fracture risk index to obtain the target stretching speed of the stretching device, and entering step S110 in the next stretching operation under the condition that the stretching stop condition is not met.
As an example, in step S160, the target stretching speed may be obtained by, but not limited to, reducing the current moving speed (i.e., the current stretching speed) of the stretching line of the stretching device based on the breaking risk index, and the greater the breaking risk index, the more the current stretching speed is adjusted downward, and for convenience of understanding, a specific example is given below: the value range of the breaking risk index in this example is an integer of not less than 2 and not more than 7 in the foregoing example, and further the current stretching speed is adjusted down by 10% when the breaking risk index is 3, the current stretching speed is adjusted down by 30% when the breaking risk index is 4, the current stretching speed is adjusted down by 50% when the breaking risk index is 5, the current stretching speed is adjusted down by 85% when the breaking risk index is 6, and the current breaking risk is extremely high when the breaking risk index is 7, and the current stretching speed can be directly adjusted down to 0 to suspend the operation of the stretching device.
Step S170, determining that the intermediate bonding copper wire is not at risk of breaking, determining the current drawing speed as the target drawing speed of the drawing device, and proceeding to step S110 in the next drawing operation if the drawing stop condition is not satisfied.
When the fracture risk index is smaller than the first risk index threshold value, judging that the current middle bonding copper wire does not have fracture risk, and not adjusting the current stretching speed of the stretching device;
it should be noted that the embodiment of the present application does not limit the conditions of the stretching stop too much, and those skilled in the art may set according to actual requirements, for example, but not limited to, setting the "length of the current intermediate bonding copper wire reaches the specified length" (i.e. the length required for stretching the initial bonding copper wire to the service) as the stretching condition.
As an embodiment, the background plate of the guiding area may be a specified color (such as white or light gray, etc.), and then the background of the area except for the initial bonding copper wire in the initial image collected by the guiding area is the specified color, and further in step S100, it may be determined whether the initial bonding copper wire has a defect by the following manner: extracting an initial bonding copper wire from the initial image through a mask technology, and obtaining a reconstructed copper wire image by targeting the extracted bonding copper wire to a preset background image; determining a copper wire morphology feature value based on morphology features of the initial bonding copper wires in the reconstructed copper wire image; if the morphological characteristic value of the copper wire is larger than the morphological characteristic threshold value, judging that the initial bonding copper wire has defects; and if the morphological characteristic value of the copper wire is smaller than or equal to the morphological characteristic threshold value, judging that the initial bonding copper wire has no defect.
Specifically, extracting an initial bonding copper wire in an initial image ROI (region of interest) of a solid background by using mask technology, adding the extracted initial bonding copper wire on a blank ROI image (namely a preset background image) to obtain a reconstructed copper wire image, performing edge detection on the reconstructed copper wire image by using an edge detection technology (such as Canny edge detection), removing a frame contour, performing morphological processing, extracting a connected domain contour from the morphologically processed image, calculating a geometric feature value, determining the geometric feature value as a copper wire morphological feature value, and comparing the copper wire morphological feature value with a preset morphological feature threshold value to identify the defect condition of the initial bonding copper wire.
As an embodiment, after determining that the initial bonding copper wire has a defect based on the initial image in step S100, the copper wire defect type of the initial bonding copper wire may also be determined based on the morphological feature of the initial bonding copper wire in the reconstructed copper wire image; marking a copper wire defect type in the initial image, and sending the initial image marked with the copper wire defect type to a control end or a user APP end so as to inform the recovery of the initial bonding copper wire; the method for identifying the defect type of the copper wire and marking the defect type of the copper wire in the initial image can refer to the prior art, and will not be described herein.
As an embodiment, after judging whether the initial bonding copper wire has a defect based on the initial image in step S100, before performing at least one stretching operation on the initial bonding copper wire, whether the guide shaft is abnormal or not may be further identified based on a tension value variation characteristic of the guide shaft in the first period, and the guide shaft is replaced under the condition that the guide shaft is abnormal, specifically, after judging that the initial bonding copper wire has no defect, the tension value of the guide shaft at the moment K2 in the first period may be detected by the tension sensor to obtain K2 tension values, and the obtained K2 tension value composition sequence is used as the tension value sequence; determining an average value of K2 tension values in the tension value sequence as a current tension value, acquiring a reference tension value of the material guiding shaft, determining a ratio of the current tension value to the reference tension value as a tension deviation value, and further determining whether the material guiding shaft is abnormal or not based on a value range of the tension deviation value; wherein K2 is an integer greater than 1, and the reference tension value is the tension value when the guide shaft is in a normal working state.
Further, if the tension deviation value is larger than the first tension threshold value and smaller than the second tension threshold value, determining that the guide shaft is in a normal working state, if the tension deviation value is smaller than the first tension threshold value or larger than the second tension threshold value, determining that the guide shaft is in an abnormal state, determining azimuth information of the guide shaft, and replacing the guide shaft according to the azimuth information through an automatic replacer; wherein the first tension threshold value is smaller than the second tension threshold value, and the first tension threshold value and the second tension threshold value can be set by a person skilled in the art according to actual requirements, for example, the first tension threshold value and the second tension threshold value can be set to be any one of 65% and 135%, 80% and 120%, 70% and 130%, and the like.
As an embodiment, after judging whether the initial bonding copper wire has a defect based on the initial image in step S100, before performing at least one stretching operation on the initial bonding copper wire, whether the rotation speed of the guide shaft is abnormal may also be judged based on the rotation speed variation characteristic of the guide shaft in the second period, and the processing may be performed in time when the rotation speed of the guide shaft is abnormal, where the second period and the first period may be the same or different; specifically, after judging that the initial bonding copper wire has no defect, detecting the rotating speeds of the material guide shaft at the M moments of the second period through a rotating speed sensor to obtain M rotating speeds, determining the ratio of the minimum value to the maximum value in the M rotating speeds as a first rotating speed deviation value, and judging whether the rotating speed of the material guide shaft is abnormal or not and a corresponding regulation mode based on the first rotating speed deviation value:
if the first rotational speed deviation value is smaller than the first rotational speed threshold value, determining that the rotational speed of the material guide shaft is abnormal, and adjusting the rotational speed of the material guide shaft based on the first rotational speed deviation value, such as correspondingly reducing the rotational speed of the material guide shaft based on the first rotational speed deviation value;
if the first rotational speed deviation value is greater than or equal to the first rotational speed threshold value, determining that the rotational speed of the material guiding shaft is normal, acquiring a reference rotational speed, determining an average value of M rotational speeds as a current rotational speed, determining a ratio of the current rotational speed to the reference rotational speed as a second rotational speed deviation, and further verifying whether the rotational speed of the material guiding shaft is truly abnormal based on the second rotational speed deviation value; the reference rotation speed is the rotation speed of the guide shaft in a normal working state, for example, the rated rotation speed of the guide shaft can be determined as the reference rotation speed, and the average value of a plurality of historical rotation speeds of the guide shaft in normal working can be determined as the reference rotation speed; the first rotation speed threshold is not limited too much, and may be set by those skilled in the art according to actual needs, for example, the first rotation speed threshold may be set to 70% or 65% or the like, but not limited thereto.
Further, if the second rotation speed deviation is smaller than or equal to the second rotation speed threshold value, determining that the deviation between the current rotation speed and the reference rotation speed is in a normal range, and further enabling the rotation speed deviation index to be the first rotation speed index; if the second rotation speed deviation is larger than the second rotation speed threshold value and smaller than or equal to the third rotation speed threshold value, determining that the current rotation speed is slightly larger than the reference rotation speed, and further determining that the rotation speed deviation index is the second rotation speed index; if the second rotation speed deviation is greater than or equal to the third rotation speed threshold value, determining that the current rotation speed is obviously greater than the reference rotation speed, and further stopping the work of the guide shaft by taking the rotation speed deviation index as the third rotation speed index, and performing rotation speed adjustment (such as reducing the rotation speed of the guide shaft) on the guide shaft based on the second rotation speed deviation value; the third rotation speed index, the second rotation speed index and the first rotation speed index are sequentially reduced, and the second rotation speed threshold value is smaller than the third rotation speed threshold value.
In this embodiment of the present application, specific values of the second rotation speed threshold and the third rotation speed threshold are not excessively limited, and specific values of the third rotation speed index, the second rotation speed index and the first rotation speed index are not excessively limited, which can be set by a person skilled in the art according to actual needs, for example, but not limited to, the second rotation speed threshold and the third rotation speed threshold are respectively set to 120% and 155%, and the third rotation speed index, the second rotation speed index and the first rotation speed index are respectively set to 3, 2, 1, and so on.
Based on the same inventive concept, the embodiment of the application also provides a device for preventing copper wire breakage self-checking of the intelligent bonding copper wire guide stretching device, which comprises; wherein:
the control unit is used for acquiring an image of the initial bonding copper wire placed in the material guiding area to obtain an initial image, and judging whether the initial bonding copper wire has defects or not based on the initial image; and in response to the initial bond wire being defect-free, performing at least one drawing operation on the initial bond wire, wherein the (i+1) th drawing operation comprises:
the stretching unit is used for determining the current stretching speed of the stretching device, stretching the current bonding copper wire towards the stretching area for a target time period at the current stretching speed through the stretching device to obtain an intermediate bonding copper wire, and fixing the intermediate bonding copper wire through the fixer; the i is an integer not less than 0, wherein when the i is 0, the current stretching speed is the initial stretching speed, and the current bonding copper wire is the initial bonding copper wire; when i is greater than 0, the current stretching speed is the target stretching speed determined by the ith stretching operation, and the current bonding copper wire is an intermediate bonding copper wire obtained by the ith stretching operation;
the tension measuring unit is used for measuring the current tension value of the tension device through the tension sensor, and determining a tension deviation index according to the ratio of the current tension value to a reference tension value, wherein the tension deviation index and the fracture risk of the middle bonding copper wire are positively correlated;
The Young modulus measuring unit is used for detecting the current Young modulus of the middle bonding copper wire through the Young's measuring instrument, determining a Young modulus deviation index according to the ratio of the current Young modulus to the reference Young modulus, and making the Young modulus deviation index and the tensile elasticity of the middle bonding copper wire positively correlated;
a fracture regulation unit for determining the sum of the tension deviation index and the Young's modulus deviation index as a fracture risk index; if the fracture risk index is greater than or equal to the first risk index threshold, determining that the middle bonding copper wire has fracture risk, and adjusting the current stretching speed according to the fracture risk index to obtain a target stretching speed; if the fracture risk index is smaller than the first risk index threshold, determining that the middle bonding copper wire does not have fracture risk, and determining the current stretching speed as the target stretching speed.
Since the apparatus is an executing apparatus for executing the method illustrated in fig. 1 in the embodiment of the present application, and the principle of the physical device for solving the problem is similar to that of the method, the implementation of the apparatus may refer to the implementation of the method, and the repetition is omitted.
Referring to fig. 2, based on the same inventive concept, the embodiment of the present application further provides a device for preventing copper wire breakage self-inspection of an intelligent bonding copper wire guide stretching device, including a memory 210 and a processor 220, where the memory 210 stores computer instructions, and the processor 220 is configured to execute the computer instructions to implement any one of the methods illustrated in fig. 2; since the device is the entity device of the foregoing apparatus in the embodiments of the present application, that is, the entity device that performs the method provided in the present application, and the principle of the entity device for solving the problem is similar to that of the method, the implementation of the entity device may refer to the implementation of the method, and the repetition is omitted.
Based on the same inventive concept, embodiments of the present disclosure provide a computer storage medium, the computer storage medium including: computer program code which, when run on a computer, causes the computer to perform any of the methods as illustrated in figure 1 above. Since the principle of solving the problem by the computer storage medium is similar to that of the method, the implementation of the computer storage medium can refer to the implementation of the method, and the repetition is omitted.
In a specific implementation, the computer storage medium may include: a universal serial bus flash disk (USB, universal Serial Bus Flash Drive), a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk or an optical disk, or the like, which can store program codes.
Based on the same inventive concept, the disclosed embodiments also provide a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform any of the methods as indicated hereinbefore. Since the principle of solving the problem by the computer program product is similar to that of any one of the methods shown in the foregoing, the implementation of the computer program product may refer to the implementation of the method, and the repetition is omitted.
The computer program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims (8)

1. The method for preventing copper wire breakage self-inspection of the intelligent bonding copper wire guide stretching device is characterized by comprising the following steps of:
acquiring an initial image by aiming at an initial bonding copper wire placed in a material guiding area, and judging whether the initial bonding copper wire has defects or not based on the initial image; and in response to the initial bond wire being defect-free, performing at least one drawing operation on the initial bond wire, wherein the (i+1) th drawing operation comprises:
determining the current stretching speed of a stretching device, stretching the current bonding copper wire to a stretching area for a target time period at the current stretching speed by the stretching device to obtain an intermediate bonding copper wire, and fixing the intermediate bonding copper wire by a fixer; the i is an integer not less than 0, wherein when the i is 0, the current stretching speed is the initial stretching speed, and the current bonding copper wire is the initial bonding copper wire; when i is greater than 0, the current stretching speed is the target stretching speed determined by the ith stretching operation, and the current bonding copper wire is an intermediate bonding copper wire obtained by the ith stretching operation;
Measuring a current tension value of the stretching device through a tension sensor, and determining a tension deviation index according to the ratio of the current tension value to a reference tension value, wherein the tension deviation index is positively correlated with the fracture risk of the middle bonding copper wire;
detecting the current Young's modulus of the middle bonding copper wire by a Young's measuring instrument, and determining a Young's modulus deviation index according to the ratio of the current Young's modulus to a reference Young's modulus, wherein the Young's modulus deviation index and the tensile elasticity of the middle bonding copper wire are positively correlated;
determining the sum of the tensile force deviation index and the Young's modulus deviation index as a fracture risk index;
if the fracture risk index is greater than or equal to the first risk index threshold, determining that the middle bonding copper wire has fracture risk, and adjusting the current stretching speed according to the fracture risk index to obtain a target stretching speed; if the fracture risk index is smaller than the first risk index threshold, determining that the middle bonding copper wire has no fracture risk, and determining the current stretching speed as a target stretching speed;
the determining the tension deviation index according to the ratio of the current tension value to the reference tension value comprises the following steps: determining the ratio of the current tension value to the reference tension value as a tension deviation value; if the tension deviation value is smaller than or equal to the first tension threshold value, determining the tension deviation index as a first tension index; if the tension deviation value is larger than the first tension threshold value and smaller than or equal to the second tension threshold value, determining that the tension deviation index is the second tension index; if the tension deviation value is larger than the second tension threshold value and smaller than or equal to the third tension threshold value, determining that the tension deviation index is the third tension index; if the tension deviation value is larger than the third tension threshold value, determining that the tension deviation index is a fourth tension index, suspending the operation of the stretching device, and sending a maximum fracture risk prompt to a control end; the first tension threshold value, the second tension threshold value and the third tension threshold value are sequentially increased; the first tension index, the second tension index, the third tension index and the fourth tension index are sequentially increased;
The method for determining the Young modulus deviation index according to the ratio of the current Young modulus to the reference Young modulus comprises the following steps: determining the ratio of the current Young's modulus and the reference Young's modulus as a modulus deviation value; if the modulus deviation value is less than or equal to the first modulus threshold value, determining the Young's modulus deviation index as a first Young's modulus index; if the modulus deviation value is greater than the first modulus threshold value and less than the second modulus threshold value, determining that the Young's modulus deviation index is the second Young's modulus index; if the modulus deviation value is greater than or equal to the second modulus threshold value, determining the Young's modulus deviation index as a third Young's modulus index; wherein the first modulus threshold is less than the second modulus threshold; the first Young's modulus index, the second Young's modulus index, and the third Young's modulus index increase in order.
2. The method of claim 1, wherein the background plate of the guide area is a designated color, the background of the area except for the initial bonding copper wire in the initial image is the designated color, and the determining whether the initial bonding copper wire has a defect based on the initial image comprises:
extracting an initial bonding copper wire from the initial image through a mask technology, and obtaining a reconstructed copper wire image by targeting the extracted bonding copper wire to a preset background image;
Determining a copper wire morphology feature value based on morphology features of the initial bonding copper wires in the reconstructed copper wire image;
if the morphological characteristic value of the copper wire is larger than the morphological characteristic threshold value, judging that the initial bonding copper wire has defects; and if the morphological characteristic value of the copper wire is smaller than or equal to the morphological characteristic threshold value, judging that the initial bonding copper wire has no defect.
3. The method of claim 2, wherein after determining whether the initial bond wire is defective based on the initial image, further comprising:
determining the type of copper wire defects of the initial bonding copper wire based on morphological characteristics of the initial bonding copper wire in the reconstructed copper wire image;
marking the copper wire defect type in the initial image so as to inform the recovery of the initial bonding copper wire.
4. The method of claim 1, wherein after determining whether the initial bond wire is defective based on the initial image, the method further comprises, prior to performing at least one stretching operation on the initial bond wire:
detecting a tension value sequence of the guide shaft in a first period of time through a tension sensor in response to the fact that the initial bonding copper wire is free of defects;
determining the average value of tension values in the tension value sequence as a current tension value, and acquiring a reference tension value of the material guiding shaft, wherein the reference tension value is the tension value when the material guiding shaft is in a normal working state;
Determining the ratio of the current tension value to the reference tension value as a tension deviation value;
if the tension deviation value is larger than a first tension threshold value and smaller than a second tension threshold value, determining that the material guide shaft is in a normal working state, wherein the first tension threshold value is smaller than the second tension threshold value;
if the tension deviation value is smaller than the first tension threshold value or larger than the second tension threshold value, determining that the material guiding shaft is in an abnormal state, determining azimuth information of the material guiding shaft, and replacing the material guiding shaft through an automatic replacement device according to the azimuth information.
5. The method of claim 1, wherein after determining whether the initial bond wire is defective based on the initial image, the method further comprises, prior to performing at least one stretching operation on the initial bond wire:
in response to the defect of the initial bonding copper wire, detecting the rotating speed of the material guiding shaft at M moments in a second period of time through a rotating speed sensor, and determining the ratio of the minimum value to the maximum value in the rotating speeds at M moments as a first rotating speed deviation value;
if the first rotational speed deviation value is smaller than the first rotational speed threshold value, determining that the rotational speed of the material guide shaft is abnormal, and adjusting the rotational speed of the material guide shaft based on the first rotational speed deviation value;
If the first rotation speed deviation value is greater than or equal to the first rotation speed threshold value, determining that the rotation speed of the material guide shaft is normal, acquiring a reference rotation speed, determining an average value of the rotation speeds at M moments as a current rotation speed, and determining a ratio of the current rotation speed to the reference rotation speed as a second rotation speed deviation; the reference rotating speed is the rotating speed of the material guiding shaft in a normal working state;
if the second rotational speed deviation is smaller than or equal to the second rotational speed threshold value, determining the rotational speed deviation index as the first rotational speed index; if the second rotational speed deviation is greater than the second rotational speed threshold and less than or equal to the third rotational speed threshold, determining the rotational speed deviation index as a second rotational speed index; if the second rotation speed deviation is greater than or equal to the third rotation speed threshold value, determining the rotation speed deviation index as the third rotation speed index, suspending the work of the material guiding shaft, and performing rotation speed adjustment on the material guiding shaft based on the second rotation speed deviation value;
the third rotation speed index, the second rotation speed index and the first rotation speed index are sequentially reduced, and the second rotation speed threshold value is smaller than the third rotation speed threshold value.
6. The method of claim 1, wherein determining the current drawing speed of the drawing device, drawing the current bonding copper wire toward the drawing area by the drawing device at the current drawing speed for a target period of time to obtain an intermediate bonding copper wire, and after fixing the intermediate bonding copper wire by the fixing device, before measuring the current tension value of the drawing device by the tension sensor, further comprises:
Detecting N pressure values at different positions of the fixer through a pressure sensor, and determining the ratio of the minimum value to the maximum value in the N pressure values as a first pressure deviation value, wherein N is an integer greater than 1;
if the first pressure deviation value is smaller than the first pressure threshold value, determining that the fixer is abnormal, and fixing the middle bonding copper wire through the standby fixer;
if the first pressure deviation value is greater than or equal to the first pressure threshold value, determining that the fixator is normal, determining an average value of N pressure values as a current pressure value, and determining a ratio of the current pressure value to a reference pressure value as a second pressure deviation value; the reference pressure value is the pressure value when the fixer is normal;
if the second pressure deviation value is greater than or equal to a second pressure threshold value, determining that the pressure of the fixator is normal;
if the second pressure deviation value is smaller than the second pressure threshold value, the pressure of the fixer is determined to be too low, and the power of the fixer is adjusted according to the second pressure deviation value.
7. An apparatus for self-checking for preventing breakage of copper wire in an intelligent bonding copper wire guide stretching device, comprising a memory for storing computer instructions and a processor for executing the computer instructions to implement the method of any one of claims 1-6.
8. A computer storage medium storing a computer program comprising program instructions which, when executed by a computer, cause the computer to perform the method of any one of claims 1-6.
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