CN114354359B - Detection device and detection method for polishing and grinding wire - Google Patents
Detection device and detection method for polishing and grinding wire Download PDFInfo
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- CN114354359B CN114354359B CN202210029454.6A CN202210029454A CN114354359B CN 114354359 B CN114354359 B CN 114354359B CN 202210029454 A CN202210029454 A CN 202210029454A CN 114354359 B CN114354359 B CN 114354359B
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- 238000005498 polishing Methods 0.000 title claims abstract description 129
- 238000001514 detection method Methods 0.000 title claims abstract description 26
- 238000011156 evaluation Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 29
- 230000001133 acceleration Effects 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
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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
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention relates to a detection device and a detection method for polishing and grinding wires, which calculate the fluctuation degree of instantaneous output power of two adjacent marking points in each section to obtain a fluctuation degree sequence of each section of polishing and grinding wires and obtain the fluctuation degree of each section; collecting the wire inlet speed and the wire outlet speed of each marked point and the corresponding time from wire inlet to wire outlet; calculating the stretching distance of the polishing and grinding wire based on the stretching time and the speeds of the two ends; based on the stretching distance and the distance between the wire inlet and the wire outlet, obtaining a stretching rate sequence of each marking point in each section, and obtaining the stretching efficiency of each section of polishing and grinding wire; obtaining the stretching degree according to the fluctuation degree and the stretching efficiency of each section of polishing and grinding wire; and evaluating each section of polishing and grinding wire based on the stretching degree of each section of polishing and grinding wire to obtain a corresponding detection result. The scheme of the invention can detect the stretching condition of the polishing and grinding wire to obtain the stretching result of the grinding wire, thereby being beneficial to the subsequent evaluation of the quality condition of the grinding brush.
Description
Technical Field
The invention relates to the field of detection of grinding brushes, in particular to a detection device and a detection method for polishing and grinding wires.
Background
For alkali-resistant and high-temperature-resistant polishing and grinding wires, the stretching quality of different batches of polishing and grinding wires is different due to the difference of production processes (such as errors of material proportion and errors of production conditions) under the same working condition when the polishing and grinding wires are stretched, so that the stretching quality of the polishing and grinding wires is better monitored, and the working condition parameters of the stretching process are adaptively adjusted.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a device and a method for detecting polishing and grinding wires, which are used for solving the problem of different stretching quality of polishing and grinding wires in different batches.
A method for detecting a polishing and grinding wire, comprising the steps of:
acquiring the instantaneous output power of each marking point when each section of polishing and grinding wire is stretched in a set time period, calculating the fluctuation degree of the instantaneous output power of two adjacent marking points in each section, obtaining a fluctuation degree sequence of each section of polishing and grinding wire, and obtaining the fluctuation degree of each section based on the fluctuation degree sequence;
collecting the wire inlet speed and the wire outlet speed of each marking point when each section of polishing and grinding wire is stretched, and corresponding time from wire inlet to wire outlet; calculating the stretching distance of the polishing and grinding wire based on the time and the speeds of the two ends; obtaining a stretching rate sequence of each marking point in each section based on the stretching distance and the distance between the wire inlet and the wire outlet, and obtaining the stretching efficiency of each section of polishing and grinding wire based on the stretching rate sequence;
obtaining a corresponding stretching degree according to the fluctuation degree and the stretching efficiency of each section of polishing and grinding wire; and evaluating each section of polishing and grinding wire based on the stretching degree of each section of polishing and grinding wire to obtain a corresponding detection result.
Further, the specific process for evaluating each section of polishing and grinding wire is as follows:
Clustering the polishing and grinding wires of each section according to the stretching degree to obtain different categories;
and judging each class based on the set threshold value interval to obtain detection results corresponding to different classes.
Further, the set threshold includes a high set threshold interval, a medium set threshold interval, and a low set threshold interval;
the category of which the maximum stretching degree and the minimum stretching degree belong to the high set threshold value interval is high-quality stretching;
the maximum stretching degree and the minimum stretching degree in each category belong to a middle set threshold interval, and the category of the middle set threshold interval is middle quality stretching;
The category of which the maximum stretching degree and the minimum stretching degree belong to the low set threshold value interval is low-quality stretching;
the maximum stretching degree and the minimum stretching degree in each category do not belong to the category of the set threshold interval, and are not qualified stretching.
Further, the method further comprises the step of processing the stretching degree of each segment of the polishing and grinding wire to obtain a stretching evaluation value of each segment of the polishing and grinding wire:
Obtaining the confidence coefficient of the stretching distance of each section of polishing and grinding wire and the corresponding acceleration during stretching;
Determining a tensile evaluation value of each section of polishing and grinding wire based on the confidence and the acceleration;
and evaluating each segment of polishing and grinding wire based on the tensile evaluation value.
Further, the confidence is the similarity between the stretching distance of all the marked points of each section of polishing and grinding wire and the corresponding set stretching distance.
The invention also provides a polishing and grinding wire detection device, which comprises a memory and a processor, wherein the processor is used for executing the steps of the polishing and grinding wire detection method stored in the memory.
The invention has the following beneficial effects:
The scheme of the invention is that the fluctuation degree sequence of the instantaneous output power of all sections of polishing and grinding wires is adopted; meanwhile, collecting the wire inlet speed and the wire outlet speed of each section of polishing and grinding wire during stretching and the corresponding time from wire inlet to wire outlet; calculating the stretching distance of the polishing and grinding wire based on the time and the speeds of the two ends; based on the stretching distance and the distance between the wire inlet and the wire outlet, the stretching efficiency of the polishing and grinding wire is obtained, and further the stretching efficiency sequence of all sections of polishing and grinding wires is obtained; the fluctuation degree sequence and the stretching efficiency sequence are utilized to respectively obtain the stretching degree of the corresponding section of the grinding wire for detecting the stretching quality of the grinding wire, namely, the scheme of the invention can realize the analysis of the stretching quality of the grinding wire on the grinding brush, and provides a new detection angle for the subsequent qualified detection of the quality of the grinding brush.
Meanwhile, the invention can more accurately analyze the stretching quality of the grinding wire by correcting the stretching degree.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions and advantages of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for detecting a polishing abrasive wire according to the present invention.
Detailed Description
In order to further describe the technical means and effects adopted by the present invention for achieving the preset purpose, the following detailed description of the specific embodiments, structures, features and effects thereof according to the present invention is given with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" means that the embodiments are not necessarily the same. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The following specifically describes a specific scheme of a polishing and grinding wire detection method provided by the invention with reference to the accompanying drawings.
The invention aims at the following scenes: the machine tool part for stretching the polishing and grinding wires is one part of the polishing and grinding brushes, namely the grinding wires form the polishing brushes, and when the stretching quality of the polishing wires is better, the quality of the polishing brushes is better, so that the detection of the stretching of the polishing wires can provide corresponding basis for the subsequent quality evaluation of the polishing brushes.
Specifically, referring to fig. 1, a flowchart of steps of a method for detecting polishing abrasive wires according to an embodiment of the present invention is shown, the method includes the following steps:
Step 1, obtaining the instantaneous output power of each marking point when each section of polishing and grinding wire is stretched, calculating the fluctuation degree of the instantaneous output power of two adjacent marking points, obtaining the fluctuation degree sequence of each section of polishing and grinding wire, and obtaining the fluctuation degree of each section based on the fluctuation degree sequence.
The polishing and grinding wires in each section are respectively marked with an initial section of polishing and grinding wire, a second section of polishing and grinding wire, … and a j section of polishing and grinding wire in a set time period as a standard; marking a section of polishing and grinding wire at regular intervals in advance, wherein the interval is the distance between the stretching machine tool parts, and marking different points on each section of polishing and grinding wire, namely marking different points at set intervals; in this embodiment, the instantaneous output power of each marking point of each segment of polishing and grinding wire in the drawing process is obtained, the recording power P j＝{p1,…,pi }, and i is the number of marking points.
The fluctuation degree of each section of polishing and grinding wire in the embodiment can be by calculating the average value of the fluctuation degree of the instantaneous power of two adjacent marking points in each section, and can also be calculated by the following modes: the absolute value of the difference value between the power average value of each marking point of the current section and the power average value of each marking point of the last section is calculated, and the ratio of the standard deviation of the instantaneous output power of each marking point of the grinding wire of the current section to the absolute value of the difference value is used as the fluctuation degree of the section.
Wherein,The STD function is the standard deviation for the expression of power fluctuation in the j-segment polishing and grinding wire. The larger the value, the more stable the power change. And vice versa. The |mean (P j)-mean(Pj-1) | expresses the degree of change in power of the j segment; in this embodiment, the average difference between the sequences of adjacent moments may be used to obtain an evaluation of the intensity of the change at the last moment. The smaller the value thereof, the smaller the variation in instantaneous power is considered; and vice versa, the larger the variation of the instantaneous power.
When the fluctuation degree is the difference value, normalization processing is needed to be carried out on the difference value, so that the fluctuation degree sequence of each section of polishing and grinding wire in the set time period is obtained.
The stretching process of the polishing and grinding wire has the problems that partial stretching is too large and partial stretching is too small when the stretching process is performed due to the difference error of the material proportion in the prior art, so that the instantaneous power of a conveying motor is considered when the stretching process is performed, and the higher the instantaneous power is, the higher the possibility that the polishing and grinding wire breaks is.
Step 2, collecting the wire inlet speed and the wire outlet speed of each marking point when each section of polishing and grinding wire is stretched, and the stretching time from the wire inlet to the wire outlet when the polishing and grinding wire is stretched; calculating the stretching distance of the polishing and grinding wire based on the stretching time and the speeds of the two ends; and obtaining a stretching rate sequence of each marking point in each section based on the stretching distance and the distance between the wire inlet and the wire outlet, and obtaining the stretching efficiency of each section of polishing and grinding wire based on the stretching rate sequence.
In this embodiment, speed sensors are used to collect speeds at two ends of a machine tool part to be stretched to obtain a wire inlet speed and a wire outlet speed, and meanwhile, the stretching time t 0＝{t1,..,ti of each section of polishing and grinding wire is recorded, so that the stretching distance is obtained based on the speeds at the two ends and the stretching time of the corresponding polishing and grinding wire.
The outlet speed and the inlet speed are v 0,v1 respectively; the outlet and inlet speeds of the polishing and grinding wire are determined by a machine tool, wherein the outlet speeds are also determined by the toughness of the polishing and grinding wire combining different diamond and alumina contents. Meanwhile, the outlet speed and the inlet speed of each section of polishing and grinding wire are consistent, so that the consistency of stretching treatment can be ensured theoretically.
The stretch ratio of each mark point in this embodiment is:
s 0 is the distance between a wire inlet and a wire outlet, namely the distance between two ends of a stretching machine tool part, and t i is the stretching time of the ith marking point of one section of polishing and grinding wire.
The average value of the stretching ratios of all the polishing and grinding wires is calculated and used as the stretching efficiency of each polishing and grinding wire, and then the stretching efficiency sequence of all the polishing and grinding wires in the set time period is obtained.
Step 3, obtaining a corresponding stretching degree according to the fluctuation degree and the stretching efficiency of each section of polishing and grinding wire; and evaluating each section of polishing and grinding wire based on the stretching degree of each section of polishing and grinding wire to obtain a corresponding detection result.
In this example, each segment of the polishing yarn was evaluated by calculating the product of the fluctuation degree and the stretching efficiency of each segment of the polishing yarn and using the product as the stretching degree of the corresponding segment of the polishing yarn.
In the invention, the stretching degree is calculated, and the fluctuation of instantaneous output power is considered to influence the stretching, so that the stretching degree is combined with the stretching efficiency, and the stretching condition of the polishing and grinding wire can be comprehensively considered.
The specific process for evaluating each section of polishing and grinding wire is as follows:
Classifying each section of polishing and grinding wire according to the stretching degree of each section of polishing and grinding wire and combining a clustering method to obtain different categories; and judging each class based on the set threshold interval to obtain detection results corresponding to different classes.
The clustering method comprises the steps of dividing polishing and grinding wires of each section by using a DBSCAN algorithm; specifically, a search radius r is set to search for a cluster of the radius r. Wherein the radius r can be adjusted according to the own requirements of the user. Of course, other clustering methods, such as KM clustering, etc., may also be employed. It should be noted that the categories in this embodiment are four categories.
The above-mentioned determination of each class based on the set threshold interval is:
the category of which the maximum stretching degree and the minimum stretching degree belong to the high set threshold value interval is high-quality stretching;
the maximum stretching degree and the minimum stretching degree in each category belong to a middle set threshold interval, and the category of the middle set threshold interval is middle quality stretching;
The category of which the maximum stretching degree and the minimum stretching degree belong to the low set threshold value interval is low-quality stretching;
the maximum stretching degree and the minimum stretching degree in each category do not belong to the category of the set threshold interval, and are not qualified stretching.
The set threshold interval comprises a high set threshold interval, a medium set threshold interval and a low set threshold interval, and the set threshold interval is a standard threshold interval which is acquired through historical normal data and accords with different stretching standards.
Further, the method further comprises the step of processing the stretching degree of each segment of the polishing and grinding wire to obtain a stretching evaluation value of each segment of the polishing and grinding wire: firstly, acquiring corresponding acceleration of each section during stretching; and obtaining the confidence of each section based on the stretching distance of each marking point in each section.
The confidence of the stretching distance in the above steps is:
And calculating the similarity between the stretching distance and the empirical stretching distance, wherein the empirical stretching distance is the empirical stretching distance of each marking point obtained according to the historical empirical data, namely, the more similar the stretching distance is to the empirical stretching distance, the closer the stretching distance is to the empirical stretching distance, and the more satisfactory the stretching distance is.
Of course, as other embodiments, the confidence level is determined by performing a straight line fit based on known stretch normal data or the currently acquired stretch distance.
Specifically, taking the currently obtained stretching distance as an example to describe, fitting the stretching distances of all marking points of all sections of polishing and grinding wires to obtain a fitted straight line, and obtaining corresponding fitting stretching distances; and obtaining the confidence coefficient of the stretching distance according to the fitting stretching distance and the stretching distance.
Specifically, a change sequence s= { S 1,…,si } at each time is obtained based on S i＝(v1-v0)ti, and a straight line is fitted by using a least square method, wherein let x= {1, …, i }, y= { S 1,…,si }, and the slope of the straight line is:
Based on the fitted straight line, a fitted stretch distance y' = { y 1,…,yi }, is obtained.
Then
Wherein,The stretching distance is fitted to the ith marking point, s i is the stretching distance of the ith marking point, and i is the total number of marking points in the jth segment of polishing and grinding wire.
Note that, the Loss is the average value of the difference between the actual value and the fitted straight line, that is, the approach degree of the fitted straight line to the actual stretch distance, when the Loss approaches 0, the higher the fitting degree is proved, and otherwise, the lower the fitting degree is proved.
And secondly, correcting the stretching degree based on the confidence and the acceleration, and determining the stretching evaluation value of each section of polishing and grinding wire.
The tensile evaluation value in this embodiment is:
Wherein R j is the stretching degree of the j-th section polishing and grinding wire, STD (A j) is the standard deviation of the acceleration of each marking point on the j-th section polishing and grinding wire, and Q is the confidence.
The u j is a correction of the degree of stretching on the basis of uniform stretching of the polishing and grinding wire.The acceleration fluctuation is evaluated, and the fluctuation of the acceleration means that the abrasion wire is pulled to fluctuate during the pulling, that is, acceleration is generated. The larger the value thereof, to mean that the ground wire is drawn more uniformly.
Q is the confidence of the stretch distance, i.e., the stretch of the finish-ground wire over a set period of time.
Thus, a tensile evaluation value u= { U 1,…,uj } of each segment of the polishing abrasive wire was obtained.
The acceleration is collected by a rotary encoder arranged on a wire inlet and a press roller of the wire outlet.
Of course, as other embodiments, a roller is mounted on a stretching line (polishing and grinding wire), and an accelerometer is mounted on the center point of the roller to record the acceleration of the roller, so as to evaluate the stretching. That is, a rolling pulley is added on the basis of the grinding wire drawing machine tool, and the axial acceleration of the rolling pulley is used for judging the drawing uniformity degree of the rope wire for correcting the drawing degree.
Finally, clustering the polishing and grinding wires of each section according to the tensile evaluation value to obtain different categories; and judging each class based on the set threshold value interval to obtain detection results corresponding to different classes.
The method of evaluating each class according to each tensile evaluation value in this embodiment is identical to the method of step 3 described above, and will not be described in detail here.
The method and the device are used for detecting the stretching of the polishing and grinding wire, namely, the grinding wire is obtained by proportioning alkali-resistant and high-temperature-resistant materials, and uneven risks are caused when the grinding wire is stretched due to proportioning errors, so that the quality of the grinding wire is poor.
The invention also provides a polishing and grinding wire detection device, which comprises a memory and a processor, wherein the processor is used for executing the steps of the polishing and grinding wire detection method stored in the memory.
Specifically, since the related detection method has been described in one of the above methods for detecting the polishing abrasive wire, the description thereof will not be repeated here.
It should be noted that: the sequence of the embodiments of the present invention is only for description, and does not represent the advantages and disadvantages of the embodiments. And the foregoing description has been directed to specific embodiments of this specification. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (5)
1. The method for detecting the polishing and grinding wire is characterized by comprising the following steps of:
acquiring the instantaneous output power of each marking point when each section of polishing and grinding wire is stretched in a set time period, calculating the fluctuation degree of the instantaneous output power of two adjacent marking points in each section of polishing and grinding wire, obtaining a fluctuation degree sequence of each section of polishing and grinding wire, and obtaining the fluctuation degree of each section of polishing and grinding wire based on the fluctuation degree sequence;
Collecting the wire inlet speed and the wire outlet speed of each marking point when each section of polishing and grinding wire is stretched, and corresponding time from wire inlet to wire outlet; calculating the stretching distance of the polishing and grinding wire based on the stretching time and the speeds of the two ends; obtaining a stretching rate sequence of each marking point in each section based on the stretching distance and the distance between the wire inlet and the wire outlet, and obtaining the stretching efficiency of each section of polishing and grinding wire based on the stretching rate sequence;
obtaining a corresponding stretching degree according to the fluctuation degree and the stretching efficiency of each section of polishing and grinding wire; based on the stretching degree of each section of polishing and grinding wire, evaluating each section of polishing and grinding wire to obtain a corresponding detection result;
The specific process for evaluating each section of polishing and grinding wire is as follows:
Clustering the polishing and grinding wires of each section according to the stretching degree to obtain different categories;
and judging each class based on the set threshold value interval to obtain detection results corresponding to different classes.
2. The method for detecting a polishing wire according to claim 1, wherein the set threshold includes a high set threshold section, a medium set threshold section, and a low set threshold section;
the category of which the maximum stretching degree and the minimum stretching degree belong to the high set threshold value interval is high-quality stretching;
the maximum stretching degree and the minimum stretching degree in each category belong to a middle set threshold interval, and the category of the middle set threshold interval is middle quality stretching;
The category of which the maximum stretching degree and the minimum stretching degree belong to the low set threshold value interval is low-quality stretching;
the maximum stretching degree and the minimum stretching degree in each category do not belong to the category of the set threshold interval, and are not qualified stretching.
3. The method for detecting a polishing and grinding wire according to claim 1, further comprising the step of processing the degree of stretching of each segment of the polishing and grinding wire to obtain a stretching evaluation value of each segment of the polishing and grinding wire:
acquiring the acceleration corresponding to each marking point when each section of polishing and grinding wire is stretched; based on the stretching distance of each marking point in each section, the confidence of each section of polishing and grinding wire is obtained;
correcting the stretching degree based on the confidence and the acceleration, and determining a stretching evaluation value of each section of polishing and grinding wire;
and evaluating each segment of polishing and grinding wire based on the tensile evaluation value.
4. A method of inspecting a polishing abrasive wire according to claim 3, wherein;
the confidence is the similarity between the stretching distance of all marking points of each section of polishing grinding wire and the corresponding set stretching distance.
5. A polishing wire inspection apparatus comprising a memory and a processor, wherein the processor is configured to perform the steps of a polishing wire inspection method according to any one of claims 1-4 stored in the memory.
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| CN202210029454.6A CN114354359B (en) | 2022-01-12 | 2022-01-12 | Detection device and detection method for polishing and grinding wire |
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| CN202210029454.6A CN114354359B (en) | 2022-01-12 | 2022-01-12 | Detection device and detection method for polishing and grinding wire |
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| CN114354359B true CN114354359B (en) | 2024-07-05 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1215634A (en) * | 1982-08-17 | 1986-12-23 | Curtis A. Mouser | Feedback controlled stretch wrapping apparatus and process |
| CN105312359A (en) * | 2014-07-16 | 2016-02-10 | 上海梅山钢铁股份有限公司 | Strip shape control method for low-temperature annealed strip steel |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02205747A (en) * | 1989-02-06 | 1990-08-15 | Toshiba Corp | Method for testing and evaluating metal fatigue acceleration |
| US6846560B2 (en) * | 2002-05-27 | 2005-01-25 | Asahi Kasei Kabushiki Kaisha | Conjugate fiber and method of producing same |
| CN207756638U (en) * | 2017-12-25 | 2018-08-24 | 西南铝业（集团）有限责任公司 | A kind of elongated article extensibility control device |
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- 2022-01-12 CN CN202210029454.6A patent/CN114354359B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1215634A (en) * | 1982-08-17 | 1986-12-23 | Curtis A. Mouser | Feedback controlled stretch wrapping apparatus and process |
| CN105312359A (en) * | 2014-07-16 | 2016-02-10 | 上海梅山钢铁股份有限公司 | Strip shape control method for low-temperature annealed strip steel |
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