CN109948210A - The combing parameter determination method of combing simulation based on fiber alignment - Google Patents
The combing parameter determination method of combing simulation based on fiber alignment Download PDFInfo
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Abstract
The combing parameter determination method for the combing simulation based on fiber alignment that the present invention relates to a kind of, combing parametric procedure is simulated and determined including combing, combing simulation process are as follows: (1) feed the simulation of combed cotton layer, i.e. plurality of fibers known to generation length, fineness and coordinate；(2) the simulation of Cylinder Carding process carries out the process of different processing according to the ordinate of every needle tooth from the relationship of the ordinate of every fiber to fiber；(3) cylinder circulation combing simulation, i.e., time and again repeat the process of the simulation of Cylinder Carding process after separating to fiber；(4) in combing inspection target calculating；After determining that combing parametric procedure generates multiple groups combing parameter at random, combing simulation is carried out, obtains multiple groups inspection target, then be screened out from it the process of one group of combing parameter.Method of the invention can determine combing parameter, greatly save time and raw material, reduce cost according to the quality requirement of material performance and final resultant yarn.
Description
Technical field
The invention belongs to technical field of textile processing, are related to a kind of combing parameter of combing simulation based on fiber alignment
Method is determined, more particularly to a kind of method by simulation combing cylinder carding process to determine combing parameter.
Background technique
Combing is one of the important procedure that yarn qualities are improved in spinning process, it is excluded small using combing cylinder, top comb
Short flannel, cotton knot and impurity in volume, and make straightening of fibers, parallel, separation, improve the uniformity of fiber, improve resultant yarn strand and
Strongly, it is irregular to improve strength.The apolegamy of combing parameter is more complicated, and is at present to pass through reality to the control of the quality of combing
The method tested, such method wastes time and cost of material.Computer simulation combing process, can be according to material performance and final
The quality requirement of resultant yarn determines combing parameter and linters rate, can greatly save time and raw material, reduce cost.
The patent of invention of Publication No. CN103400029A is " quasi- to wait fineness fibers random alignment prediction resultant yarn in single thread disconnected
Splitting brute force method " the single thread ultimate strength that the fiber that fineness are stretched, the arrangement of the fiber in single thread such as simulates, and simulate can be anti-
Mirror the relationship between fibre length and yarn strength.But it is arranged in parallel that above-mentioned patent assumes that fiber stretches in sliver,
There are also certain differences with the hooked fibre in actual sliver.
The Master's thesis " in sliver fibre morphology and arrange influence to evenness fault " in Donghua University in January, 2016,
The crotch state for considering fiber on the basis of forefathers to the arrangement of fiber in sliver, more meets practical shape of the fiber in sliver
State, the generation for cotton layer before combing provide basis.
Article " the combing processing mould based on the distribution of fibre length radical of the 6th phase of volume 38 in June, 2017 " textile journal "
" a kind of area of computer aided combing is set the patent of invention of quasi- and web quality prediction " and Publication No. CN104217085A
The method of meter and comber web prediction of quality " simulates combing process on the basis of fiber length distribution, in different works
Analog result under skill parameter has good correlation with experimental result.But in the combing simulation process of above-mentioned patent in the presence of
Column are insufficient: (1) fiber in the hypothesis cotton layer of the invention is stretched straight parallel, does not account for the actual form of fiber, does not have
Have and the degree of stretching of fiber is studied, has ignored the variation of head-end location caused by stretching because of fiber combing, above-mentioned combing comb
Reason process is only to remove the process of staple fiber, is only had an impact to the short fiber content of cotton layer；(2) in combing simulation process, fiber
Be combed into noil foundation be in spinning theory existing fibre length and boundary fibre length (L3=separation gauge+
(0.5- gives cotton coefficient) × give cotton length) size relation judged that is, fibre length is less than boundary fibre length, the then fibre
Dimension enter noil, institute in this way to length be less than interface length staple fiber below elimination factor be absolutely, and reality
In production, combing is only 50~60% to the elimination factor of staple fiber, illustrates that the fiber of not less than interface length is all directly entered
Noil.Therefore, the carding process of the combing of prior art simulation and practical combing process have bigger difference, and the accuracy of simulation is not
It is good, it can not accurately Instructing manufacture.
Therefore it provides a kind of method for the carding process for capableing of accurate simulation combing, and then it is used for Instructing manufacture, it obtains
To a kind of great realistic meaning of combing parameter determination method of the combing simulation based on fiber alignment of precise and high efficiency.
Summary of the invention
The purpose of the present invention is overcoming the carding process accuracy of prior art simulation combing bad, can not accurately instruct
The problem of production, provides a kind of combing parameter determination method of the combing simulation based on fiber alignment of precise and high efficiency.This
The continuous cotton layer of practical crotch form generating of the invention based on fiber is logical according to the close distribution of the tooth of combing cylinder and the combing of fiber
The relationship in road carries out combing simulation to the foundation for being used as judging noil of fiber with cylinder needle tooth, meets simulation more
Actual combing carding process.
In order to achieve the above objectives, the scheme that the present invention uses is as follows:
The combing parameter determination method of combing simulation based on fiber alignment, comprising the following steps:
A) combing is simulated；
(1) simulation of combed cotton layer is fed；
(2) simulation of Cylinder Carding process；
The combed cotton layer that step (1) is generated as the cotton layer of input combing, from one end of cotton layer begin through cylinder into
Row combing, detailed process is as follows:
Firstly, establishing combed cotton layer coordinate: using the outbound course of cotton layer as abscissa, cotton layer outbound course is negative direction,
Its vertical direction is ordinate；
Then, the coordinate of every needle tooth on cylinder is determined in the combed cotton layer coordinate, jth arranges i-th needle tooth
The ordinate w of upper sideij1=Wij+dj/ 2, the ordinate w of downsideij2=Wij-dj/ 2, i=1,2 ..., M, M are that jth arranges needle
Quantity, j=1,2 ..., M', M ' be cylinder upper pin gear number of rows, Wij=dj/2+(dj+sj) (i-1), djEvery, needle is arranged for jth
The thickness (thickness of needle tooth is all identical in single needle) of needle tooth, unit mm, sjFor the needle tooth tooth pitch of jth row, unit mm；
Finally, being combed, carding process is the relationship according to the ordinate of the ordinate and every fiber of every needle tooth
The process of different processing is carried out to fiber, specific as follows:
As sfibertail (ii) < holdstate (jj), and wij2<fiberj(ii)<wij1When, illustrate that fiber is not clamped
Plate hold and with needle tooth contact, in such cases by fiber combing enter noil；
As sfibertail (ii) >=holdstate (jj) >=sfiberhead (ii), illustrate that fiber is held by nipper,
The combing of buckling fiber type is stretched in such cases；
As wfibertail (ii) < holdstate (jj), and wij2<fiberj(ii)<wij1When, illustrate that fiber is not clamped
Plate hold and with needle tooth contact, in such cases by fiber combing enter noil；
As wfibertail (ii) < holdstate (jj), and wij2> fiberj (ii) or fiberj (ii) > wij1When, it says
Light fibers is not held by nipper, not with the contact of needle tooth, cannot be combed, and fiber not can enter noil in such cases, will
Fiber is sent into cotton net or is combed again to fiber；
As hooktail (ii) > holdstate (jj), and wij2<fiberj(ii)<wij1When, illustrate the preceding crotch of fiber
Part is held by nipper, and fiber and needle tooth contact, is at this time combed the preceding hook portion of fiber disconnected；
As wfibertail (ii)>=holdstate (jj)>=wfiberhead (ii), and hooktail (ii)<
When holdstate (jj), illustrate that fiber is held by nipper and preceding hook portion is not held by nipper, in such cases by fiber
Preceding hook portion combing is stretched；
Wherein, sfibertail (ii) is the abscissa of the right head end of buckling fiber type, holdstate (jj)=lmax+
(jj-1) × A, jj are carding times, lmaxFor the length of longest fiber, unit mm, A are to give cotton length, unit mm,
Fiberj (ii) be the i-th i root fiber ordinate (fiber is parallel to axis of abscissas in reference axis, thus main body,
The ordinate of crotch etc. is consistent), sfiberhead (ii) is the abscissa of the left head end of buckling fiber type, wfibertail
It (ii) is the abscissa of the right head end of crotch fiber type, hooktail (ii) is the horizontal seat of the right head end of crotch before the i-th i root fiber
Mark, wfiberhead (ii) are the abscissa of the left head end of crotch fiber type；
(3) cylinder circulation combing simulation；
Fiber separation: judge whether the abscissa of the left head end of the fiber after being combed is located at [xchead, xchead+A]
It is interior, if it is, fiber is delivered to cotton net, conversely, then without processing, xchead=holdstate (jj)-L, L=B+
12.5 (detaching roller radius)+(1-K) × A, B are detaching distance, and unit mm, K are to give cotton coefficient, 0 < K≤1；
Time and again repeat: cotton layer repeats step (2) to the distance of outbound course displacement A (to cotton length), until jaw line arrives
Up to LS-lmaxPosition, Ls are cotton synusia segment length, unit mm；
(4) in combing inspection target calculating；
Linters rate Q2, noil short fiber content SfNoil(being less than 16mm) and yarn short fiber content SfYarnThe calculating of (being less than 16mm)
Formula is as follows:
In formula, w1For the sum of the weight of fiber for entering noil, w2It is single for the sum of the weight of fiber for not entering noil
The weight of fiber is equal to the product of the length of single fiber and the fineness of single fiber, S1、S2、S3、….、SG+1It is that noil is every
Δ mm length is divided into one group, total R group, and R × Δ > lmax, 0~Δ for being calculated, Δ~2 Δs, 2 Δs~3 Δs ..., G Δ~
The weight of the fiber of 16mm long accounts for the percentage of yarn total weight, S1’、S2’、S3’、….、SG+1' it is by the every Δ mm of yarn
Length is divided into one group, total R group, and R × Δ > lmax, 0~Δ for being calculated, Δ~2 Δs, 2 Δs~3 Δs ..., G Δ~16mm
The weight of long fiber accounts for the percentage of yarn total weight, and G is that 16/ Δ is rounded downwards (i.e. 16 numerical value obtained divided by Δ
Integer part)；
B) combing parameter is determined；
Firstly, generating multiple needle transverse tooth thickness degree, needle tooth tooth pitch (i.e. the center of two adjacent needles teeth away from), detaching distance and long to cotton
Degree, needle tooth tooth pitch include first combing area's needle tooth tooth pitch, second combing area's needle tooth tooth pitch, third combing area's needle tooth tooth pitch, the 4th
Comb area's needle tooth tooth pitch and the 5th combing area's needle tooth tooth pitch, needle transverse tooth thickness degree, first combing area's needle tooth tooth pitch, the second combing Qu Zhenchi
The value range difference of tooth pitch, third combing area's needle tooth tooth pitch, the 4th combing area's needle tooth tooth pitch and the 5th combing area's needle tooth tooth pitch
Correspond to 0.10~0.35mm, 0.75~0.85mm, 0.6~0.7mm, 0.55~0.6mm, 0.4~0.5mm and 0.3~0.4mm
(step-length when needle tooth tooth pitch value is 0.05mm, and step-length when needle tooth Thickness is 0.05mm), detaching distance 8mm,
10mm, 12mm are 4.7mm, 5.2mm, 5.9mm to cotton length, by needle transverse tooth thickness degree, needle tooth tooth pitch, detaching distance and give cotton length
It is combined (combination is unlimited, is random combine) and obtains multiple groups combing parameter；
Then, the corresponding linters rate Q of every group of combing parameter is obtained by the simulation process of step a)2, noil short flannel
Rate SfNoilWith yarn short fiber content SfYarn；
Then, it according to the number for the yarn to be spinned, determines the range of linters rate, filters out corresponding linters rate and meet the requirements
Several groups of combing parameters (if linters rate is all unsatisfactory for requiring, filter out and the immediate several groups of essences of ideal linters rate
Comb technological parameter), when number is 30~14tex, linters rate is 14~16%；When number is 14~10tex, linters rate is
15~18%；When number is 10~6tex, linters rate is 17~20%；As number<6tex, linters rate>19%；
Then, corresponding noil short fiber content Sf is filtered outNoilSeveral groups of combing parameters greater than 60% are (if noil is short
Suede rate SfNoilAll it is not more than 60%, then filters out noil short fiber content SfNoilBiggish several groups of combing parameters)；
Finally, filtering out corresponding yarn short fiber content SfYarnClosest to one group of essence of obtained yarn short fiber content
Technological parameter is combed (if corresponding yarn short fiber content SfYarnCombing closest to obtained yarn short fiber content is joined
Counting is multiple groups, then optional one group).
As a preferred option:
The combing parameter determination method of combing simulation based on fiber alignment as described above, feeding combed cotton layer
Specific step is as follows for simulation:
(1.1) length of every fiber in cotton layer is generated；
(1.2) fineness of every fiber in cotton layer is generated；
(1.3) hook-type and coordinate of every fiber are determined；
(1.4) feeding combed cotton layer is generated.
The combing parameter determination method of combing simulation based on fiber alignment as described above, the tool of step (1.1)
Body process are as follows:
The length frequency histogram of combing rouleau is obtained by test first, the group of length frequency histogram is away from being d, group number
For m, the area of each group rectangle is Piii, iii=1,2 ... k ..., m；
Then the random number r between 0 to 1 is generated1e；
Then determination meets bk≤r1e<bk+1BkAnd bk+1,
Finally by formulaFibre length L is calculated；
By this process, random number r is generated respectively11、r12、…、r1e、...、r1N, can sequentially generate the 1st, 2 ..., e ...,
The length of N root fiber.
The combing parameter determination method of combing simulation based on fiber alignment as described above, the tool of step (1.2)
Body process are as follows:
The fineness frequency histogram of combing rouleau is obtained by test first, the group of fineness frequency histogram is away from being c, group number
For m ', the area of each group rectangle is Qiii’, iii '=1,2 ... k ' ..., m '；
Then the random number r between 0 to 1 is generated2e’；
Then determination meets dk’≤r2e’<dk’+1Dk’And dk’+1,
Finally by formulaFibre fineness fin is calculated；
By this process, random number r is generated respectively21、r22、…、r2e'、...、r2N, can sequentially generate the 1st, 2 ...,
E ' ..., the fineness of N root fiber.
Integral Thought i.e. firstly generate random number, then found in histogram corresponding frequency and, finally by calculating
Obtain fineness because the number of each generation be it is random, the fineness generated is also random, but be on the whole obey it is former
The distribution histogram come.
The combing parameter determination method of combing simulation based on fiber alignment as described above, the tool of step (1.3)
Body process are as follows:
With the outbound course of cotton layer, the actual form of fiber in cotton layer is divided into preceding crotch, rear crotch, both ends crotch and is bent
Curved four class, the ratio that quantity accounts for fiber sum is respectively P1、P2、P3、P4, then the 1st to P1× N root fiber is that preceding crotch is fine
Dimension, P1× N+1 to (P1+P2) × N root fiber is trailing hooked fibre, and so on, determine the hook-type of every fiber；
The head end coordinate of buckling fiber type is determined in the combed cotton layer coordinate: being generated random in [0,1] section
Number r and rr, left head end coordinate are (r × Ls, rr × H), right head end coordinate is (r × Ls+li× η, rr × H), wherein H is cotton layer
Width, unit mm, liFor the length of fiber, unit mm, η are degree of the stretching coefficient of fiber；
The coordinate of crotch fiber type is determined in the combed cotton layer coordinate:
The left head end coordinate of main body and the right head end coordinate of main body for first determining crotch fiber type, determine method respectively with buckling type
The left head end coordinate and right head end coordinate of fiber；
Determine that the hook heads of crotch fiber type sit up straight mark again, the master of the ordinates of all crotch head ends with crotch fiber type
(fiber is parallel to axis of abscissas, therefore the ordinate of main body, crotch etc. to the ordinate of the left head end of body in reference axis
It is consistent), when fiber is both ends crotch, the abscissa hookhead1 (ii) of the preceding left head end of crotch is the same as crotch fiber type
The abscissa of the left head end of main body, the preceding left head end of crotch are overlapped with the left head end of main body, and the length of preceding crotch is (1- η) × li× α, i.e.,
The abscissa hooktail1 (ii) of the preceding right head end of crotch=hookhead1 (ii)+(1- η) × li× α, α are in [0,1] section
Interior random number, the abscissa hooktail2 (ii) of the rear right head end of crotch with the right head end of main body of crotch fiber type abscissa,
The right head end of crotch is overlapped with the right head end of fibrous body afterwards, and rear hook length is (1- η) × li× (1- α) the i.e. left head end of rear crotch
Abscissa hookhead2 (ii)=hooktail2 (ii)-(1- η) × li×(1-α)；When fiber is preceding crotch, preceding crotch is right
The abscissa of head end is hooktail1 (ii)=hookhead1 (ii)+(1- η) × li；When fiber is rear crotch, rear crotch
The abscissa of left head end is hookhead2 (ii)=hooktail2 (ii)-(1- η) × li。
The combing parameter determination method of combing simulation based on fiber alignment as described above, the tool of step (1.4)
Body process are as follows:
The left head end of buckling fiber type is connected with right head end, buckling fiber type is generated at this time, by crotch fiber type
The left head end of main body is connected with the right head end of main body, the main body of crotch fiber type is generated at this time, by the right head end of preceding crotch and preceding crotch
Left head end connection, generates the preceding crotch of crotch fiber type, while the right head end of rear crotch being connected with the left head end of rear crotch at this time,
The rear crotch for generating crotch fiber type at this time, since the main body head end of crotch fiber type is overlapped with crotch head end junction, because
This no longer needs to connect the two.
The combing parameter determination method of combing simulation based on fiber alignment as described above, all random numbers are all
It is to be generated by the rand function of Matlab, the scope of protection of the present invention is not limited to this, any other method can also be used,
As long as the random number positioned at [0,1] section can be generated.
The combing parameter determination method of the combing simulation based on fiber alignment, Δ 2 are of the invention as described above
Protection scope is without being limited thereto, and the value of Δ can appropriate adjustment, it is however generally that Δ is smaller, and fiber subgroup is more, the fibre being calculated
Average length or fineness are tieed up closer to actual value, however when Δ is too small, will lead to that calculation amount is excessive, and the preferred Δ of the present invention is 2,
Calculation amount is moderate at this time, and the average fiber length or fineness being calculated can relatively accurately react actual average length or
Fineness.
The utility model has the advantages that
(1) the combing parameter determination method of the combing simulation of the invention based on fiber alignment can be according to feed stock
It can determine combing parameter with the quality requirement of final resultant yarn, greatly save time and raw material, reduce cost；
(2) the combing parameter determination method of the combing simulation of the invention based on fiber alignment fully takes into account combing
The close distribution of the tooth of cylinder and the relationship in the combing channel of fiber and the practical crotch form of fiber, the combing of the combing of simulation
Process more meets practical combing process, therefore the accuracy simulated is preferable.
Detailed description of the invention
Fig. 1 is cotton layer schematic diagram before combing combs；
Fig. 2 is Cylinder Carding schematic diagram；
Fig. 3 is fibre bundle seperated schematic diagram；
Fig. 4 is fiber length distribution histogram；
Fig. 5 is fibre fineness distribution histogram；
Fig. 6 is cotton layer schematic diagram after combing combing.
Specific embodiment
The invention will be further elucidated with reference to specific embodiments.It should be understood that these embodiments are merely to illustrate this hair
It is bright rather than limit the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, art technology
Personnel can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Fixed range.
A kind of combing parameter determination method of the combing simulation based on fiber alignment, comprising the following steps:
A) combing is simulated；
(1) simulation of combed cotton layer is fed；
Specially (combing combs preceding cotton layer schematic diagram such as Fig. 1 to the not equal thin and cellucotton layer with crotch of generation Length discrepancy
It is shown) as the cotton roll for inputting combing, cylinder is begun through from one end of cotton layer and is combed, and does not consider fiber and fiber, fibre
Tieing up will when the position of staple fiber is when needle tooth is in the projection in the sliver direction of motion the frictional force between cylinder needle tooth
Combing effect is formed to fiber, the needle tooth of cylinder has certain thickness, and the arrangement on cylinder has certain density, cylinder
The needle tooth density configuration on surface is discharged to heel row in the past and gradually increases, so that combing is gradually reinforced, advantageously reduces fiber
Damage, the gear piece of cylinder can be divided into four or five combing areas according to the difference of its arranging density and the thickness of needle tooth, the
One combing area's needle tooth is thicker and sparse, and the 5th combing area's needle tooth is relatively thin and intensive, and cotton floor is first combed most by the first combing area
It is combed afterwards by the 5th combing area；
Assuming that detaching distance is B (mm), it is A (mm) to cotton length, is K (0 < K≤1) to cotton coefficient, before being to cotton mode
Cotton is fed, then is L (mm)=B+12.5 (detaching roller radius)+(1-K) × A by the length of the jaw exterior palpi clump of Cylinder Carding,
Only with needle tooth contact and be not combed by the fiber that nipper is held into noil, as fiber is 1. in Fig. 2；Though fiber not by
Nipper is held, but since this fiber is not with the contact of needle tooth, therefore cannot be combed, as fiber is 2. in Fig. 2；When fiber and needle
When the preceding hook portion of tooth contact and fiber is held by nipper, the hook portion of fiber is disconnected by comb, as fiber is 3. in Fig. 2；Work as fibre
Dimension be in contact with needle tooth and fiber by nipper gripping and preceding hook portion do not held by nipper when, the hook portion of fiber is combed
It stretches, as fiber is 4. in Fig. 2；
The method of the present invention holds combing to one end of cotton layer in combing process, and the position of the head end of fiber is due to straightening of fibers
It changes, has an impact to the separation of next step fibre bundle, more meet the variation of the position of fiber and form in practical combing；Tool
Steps are as follows for body:
(1.1) length of every fiber in cotton layer, detailed process are generated are as follows:
The length frequency histogram of combing rouleau is obtained by test first, the group of length frequency histogram is away from being d, group number
For m, the area of each group rectangle is Piii, iii=1,2 ... k ..., m；
Then the random number r between 0 to 1 is generated by the rand function of Matlab1e；
Then determination meets bk≤r1e<bk+1BkAnd bk+1,
Finally by formulaFibre length L is calculated；
By this process, random number r is generated by the rand function of Matlab respectively11、r12、…、r1e、...、r1N, Ji Keyi
It is secondary generate the 1st, 2 ..., e ..., the length of N root fiber；
(1.2) fineness of every fiber in cotton layer, detailed process are generated are as follows:
The fineness frequency histogram of combing rouleau is obtained by test first, the group of fineness frequency histogram is away from being c, group number
For m ', the area of each group rectangle is Qiii’, iii '=1,2 ... k ' ..., m '；
Then the random number r between 0 to 1 is generated by the rand function of Matlab2e’；
Then determination meets dk’≤r2e’<dk’+1Dk’And dk’+1,
Finally by formulaFibre fineness fin is calculated；
By this process, random number r is generated by the rand function of Matlab respectively21、r22、…、r2e’、...、r2N?
Sequentially generate the 1st, 2 ..., e ' ..., the fineness of N root fiber；
(1.3) hook-type and coordinate of every fiber, detailed process are determined are as follows:
With the outbound course of cotton layer, the actual form of fiber in cotton layer is divided into preceding crotch, rear crotch, both ends crotch and is bent
Curved four class, the ratio that quantity accounts for fiber sum is respectively P1、P2、P3、P4, then the 1st to P1× N root fiber is that preceding crotch is fine
Dimension, P1× N+1 to (P1+P2) × N root fiber is trailing hooked fibre, and so on, determine the hook-type of every fiber；
The head end coordinate of buckling fiber type is determined in the combed cotton layer coordinate: being generated by the rand function of Matlab
Random number r and rr in [0,1] section, left head end coordinate are (r × Ls, rr × H), right head end coordinate is (r × Ls+li×η,
Rr × H), wherein H is the width of cotton layer, unit mm, liFor the length of fiber, unit mm, η are degree of the stretching system of fiber
Number；
The coordinate of crotch fiber type is determined in the combed cotton layer coordinate:
The left head end coordinate of main body and the right head end coordinate of main body for first determining crotch fiber type, determine method respectively with buckling type
The left head end coordinate and right head end coordinate of fiber；
Determine that the hook heads of crotch fiber type sit up straight mark again, the master of the ordinates of all crotch head ends with crotch fiber type
The ordinate of the left head end of body, when fiber is both ends crotch, abscissa hookhead1 (ii) same hook type of the preceding left head end of crotch
The abscissa of the left head end of the main body of fiber, abscissa hooktail1 (ii)=hookhead1 (ii)+(1- of the preceding right head end of crotch
η)×li× α, α are the random number in [0,1] section generated by the rand function of Matlab, the cross of the rear right head end of crotch
Abscissa of the coordinate hooktail2 (ii) with the right head end of main body of crotch fiber type, the abscissa of the rear left head end of crotch
Hookhead2 (ii)=hooktail2 (ii)-(1- η) × li×(1-α)；When fiber is preceding crotch, the preceding right head end of crotch
Abscissa is hooktail1 (ii)=hookhead1 (ii)+(1- η) × li；When fiber is rear crotch, the rear left head end of crotch
Abscissa be hookhead2 (ii)=hooktail2 (ii)-(1- η) × li；
(1.4) feeding combed cotton layer, detailed process are generated are as follows:
The left head end of buckling fiber type is connected with right head end, by the left head end of the main body of crotch fiber type and the right head end of main body
Connection, the right head end of preceding crotch is connected with the left head end of preceding crotch, while the right head end of rear crotch being connected with the left head end of rear crotch；
The present invention has been experimentally confirmed combing simulation process of the invention, and accuracy is higher compared with the existing technology, specifically
It is as follows:
The average length of simulated object is 25.1mm, distribution of lengths histogram such as Fig. 4, average fineness 0.17tex, fineness
Distribution histogram such as Fig. 5, fiber averagely degree of stretching are 0.7, preceding crotch, rear crotch, both ends crotch and buckling type crotch ratio
Example is respectively as follows: 11%, 52%, 8%, 29%；
Combing parameter in simulation process are as follows: give cotton length 5.2mm, detaching distance 10mm, needle transverse tooth thickness degree, the first comb
Manage area's needle tooth tooth pitch, second combing area's needle tooth tooth pitch, third combing area's needle tooth tooth pitch, the 4th combing area's needle tooth tooth pitch and the 5th comb
The value range of reason area's needle tooth tooth pitch respectively corresponds as 0.35mm, 0.85mm, 0.7mm, 0.6mm, 0.5mm and 0.4mm；
Test the linters rate Q measured2, noil short fiber content SfNoilWith yarn short fiber content SfYarnRespectively 15.4%, 68%
With 7.2%；
The linters rate Q simulated using method of the invention2, noil short fiber content SfNoilWith yarn short fiber content SfYarn
Respectively 15.8%, 65% and 7%；
It is simulated using the method in " combing operating simulation and web quality prediction based on the distribution of fibre length radical "
The linters rate Q arrived2, noil short fiber content SfNoilWith yarn short fiber content SfYarnRespectively 22%, 70% and 0%；
Comparison is obtained as can be seen that under the raw material and combing parameter of identical feeding using analogy method of the invention
The analogue value it is more identical with measured value, illustrate analogy method of the invention have accuracy more higher than the prior art；
(2) simulation of Cylinder Carding process；
The simulation of Cylinder Carding process is specially by the left head-end location of fiber in the palpus clump after combing in step (1) apart from palpus
The fiber separation that clump head-end location is less than A (to cotton length), which comes out, enters cotton net, if the fiber of overstriking in Fig. 3 is by isolated fibre
Dimension, cotton layer is to the distance of outbound course displacement A (giving cotton length), and then cylinder combs the cotton layer head end after separation again
Reason enters next combing cyclic process, therefore the cotton layer for feeding combing is that continuously, combing process is to move in circles
's.And a piece of cotton is generated in aforementioned patent " a kind of method of area of computer aided combing design and comber web prediction of quality "
Layer, and then fiber head end all in cotton layer passes through combing process in a distance to cotton length, regenerate a piece of
Cotton layer is independent from each other between cotton layer and cotton layer；Concrete operations are as follows:
The combed cotton layer that step (1) is generated as the cotton layer of input combing, from one end of cotton layer begin through cylinder into
Row combing (cotton layer schematic diagram is as shown in Figure 6 after combing), detailed process is as follows:
Firstly, establishing combed cotton layer coordinate: using the outbound course of cotton layer as abscissa, cotton layer outbound course is negative direction,
Its vertical direction is ordinate；
Then, the coordinate of every needle tooth on cylinder is determined in the combed cotton layer coordinate, jth arranges i-th needle tooth
The ordinate w of upper sideij1=Wij+dj/ 2, the ordinate w of downsideij2=Wij-dj/ 2, i=1,2 ..., M, M are that jth arranges needle
Quantity, j=1,2 ..., M', M ' be cylinder upper pin gear number of rows, Wij=dj/2+(dj+sj) (i-1), djEvery, needle is arranged for jth
The thickness of needle tooth, unit mm, sjFor the needle tooth tooth pitch of jth row, unit mm；
Finally, being combed:
As sfibertail (ii) < holdstate (jj), and wij2<fiberj(ii)<wij1When, fiber is combed and is entered
Noil；
As sfibertail (ii) >=holdstate (jj) >=sfiberhead (ii), the combing of buckling fiber type is stretched
Directly；
As wfibertail (ii) < holdstate (jj), and wij2<fiberj(ii)<wij1When, fiber is combed and is entered
Noil；
As wfibertail (ii) < holdstate (jj), and wij2> fiberj (ii) or fiberj (ii) > wij1When, it will
Fiber is sent into cotton net or is combed again to fiber；
As hooktail (ii) > holdstate (jj), and wij2<fiberj(ii)<wij1When, by the preceding hook part of fiber
Divide comb disconnected；
As wfibertail (ii)>=holdstate (jj)>=wfiberhead (ii), and hooktail (ii)<
When holdstate (jj), the preceding hook portion combing of fiber is stretched；
Wherein, sfibertail (ii) is the abscissa of the right head end of buckling fiber type, holdstate (jj)=lmax+
(jj-1) × A, jj are carding times, lmaxFor the length of longest fiber, unit mm, A are to give cotton length, unit mm,
Fiberj (ii) is the ordinate of the i-th i root fiber, and sfiberhead (ii) is the abscissa of the left head end of buckling fiber type,
Wfibertail (ii) is the abscissa of the right head end of crotch fiber type, and hooktail (ii) is the right head of crotch before the i-th i root fiber
The abscissa at end, wfiberhead (ii) are the abscissa of the left head end of crotch fiber type；
(3) cylinder circulation combing simulation；
Fiber separation: judge whether the abscissa of the left head end of the fiber after being combed is located at [xchead, xchead+A]
It is interior, if it is, fiber is delivered to cotton net, conversely, then without processing, xchead=holdstate (jj)-L, L=B+
12.5+ (1-K) × A, B are detaching distance, and unit mm, K are to give cotton coefficient, 0 < K≤1；
Time and again repeat: cotton layer repeats step (2) to the distance of outbound course displacement A, until jaw line reaches LS-lmaxPosition
It sets, Ls is cotton synusia segment length, unit mm；
(4) in combing inspection target calculating；
Linters rate Q2, noil short fiber content SfNoil(being less than 16mm) and yarn short fiber content SfYarnThe calculating of (being less than 16mm)
Formula is as follows:
In formula, w1For the sum of the weight of fiber for entering noil, w2It is single for the sum of the weight of fiber for not entering noil
The weight of fiber is equal to the product of the length of single fiber and the fineness of single fiber, S1、S2、S3、….、SG+1It is that noil is every
Δ mm length is divided into one group, total R group, and R × Δ > lmax, 0~Δ for being calculated, Δ~2 Δs, 2 Δs~3 Δs ..., G Δ~
The weight of the fiber of 16mm long accounts for the percentage of yarn total weight, S1’、S2’、S3’、….、SG+1' it is by the every Δ mm of yarn
Length is divided into one group, total R group, and R × Δ > lmax, 0~Δ for being calculated, Δ~2 Δs, 2 Δs~3 Δs ..., G Δ~16mm
The weight of long fiber accounts for the percentage of yarn total weight, and G is that 16/ Δ is rounded downwards；
B) combing parameter is determined；
Firstly, generating multiple needle transverse tooth thickness degree, needle tooth tooth pitch, detaching distance and to cotton length, needle tooth tooth pitch includes the first comb
Manage area's needle tooth tooth pitch, second combing area's needle tooth tooth pitch, third combing area's needle tooth tooth pitch, the 4th combing area's needle tooth tooth pitch and the 5th comb
Area's needle tooth tooth pitch is managed, needle transverse tooth thickness degree, first combing area's needle tooth tooth pitch, second combing area's needle tooth tooth pitch, third comb area's needle tooth tooth
Away from, the 4th combing area's needle tooth tooth pitch and the 5th combing area's needle tooth tooth pitch value range respectively correspond for 0.10~0.35mm,
0.75~0.85mm, 0.6~0.7mm, 0.55~0.6mm, 0.4~0.5mm and 0.3~0.4mm, detaching distance 8mm,
10mm, 12mm are 4.7mm, 5.2mm, 5.9mm to cotton length, by needle transverse tooth thickness degree, needle tooth tooth pitch, detaching distance and give cotton length
It is combined to obtain multiple groups combing parameter；
Then, the corresponding linters rate Q of every group of combing parameter is obtained by the simulation process of step a)2, noil short flannel
Rate SfNoilWith yarn short fiber content SfYarn；
Then, it according to the number for the yarn to be spinned, determines the range of linters rate, filters out corresponding linters rate and meet the requirements
Several groups of combing parameters, when number be 30~14tex when, linters rate be 14~16%；When number is 14~10tex,
Linters rate is 15~18%；When number is 10~6tex, linters rate is 17~20%；As number<6tex, linters rate>
19%；
Then, corresponding noil short fiber content Sf is filtered outNoilSeveral groups of combing parameters greater than 60%；
Finally, filtering out corresponding yarn short fiber content SfYarnClosest to one group of essence of obtained yarn short fiber content
Comb technological parameter.
Claims (8)
1. the combing parameter determination method that the combing based on fiber alignment is simulated, characterized in that the following steps are included:
A) combing is simulated；
(1) simulation of combed cotton layer is fed；
(2) simulation of Cylinder Carding process；
The combed cotton layer that step (1) is generated begins through cylinder from one end of cotton layer and is combed as the cotton layer of input combing
Reason, detailed process is as follows:
Firstly, establishing combed cotton layer coordinate: using the outbound course of cotton layer as abscissa, cotton layer outbound course is negative direction, is hung down
Histogram is to for ordinate；
Then, the coordinate of every needle tooth on cylinder is determined in the combed cotton layer coordinate, jth arranges the upside of i-th needle tooth
The ordinate w in faceij1=Wij+dj/ 2, the ordinate w of downsideij2=Wij-dj/ 2, i=1,2 ..., M, M are the number that jth arranges needle
Amount, j=1,2 ..., M', M ' be cylinder upper pin gear number of rows, Wij=dj/2+(dj+sj) (i-1), djEvery needle tooth of needle is arranged for jth
Thickness, unit mm, sjFor the needle tooth tooth pitch of jth row, unit mm；
Finally, being combed:
As sfibertail (ii) < holdstate (jj), and wij2<fiberj(ii)<wij1When, fiber combing is entered into noil；
As sfibertail (ii) >=holdstate (jj) >=sfiberhead (ii), the combing of buckling fiber type is stretched；
As wfibertail (ii) < holdstate (jj), and wij2<fiberj(ii)<wij1When, fiber combing is entered into noil；
As wfibertail (ii) < holdstate (jj), and wij2> fiberj (ii) or fiberj (ii) > wij1When, by fiber
It is sent into cotton net or fiber is combed again；
As hooktail (ii) > holdstate (jj), and wij2<fiberj(ii)<wij1When, the preceding hook portion of fiber is combed
It is disconnected；
As wfibertail (ii)>=holdstate (jj)>=wfiberhead (ii), and hooktail (ii)<holdstate
(jj) when, the preceding hook portion combing of fiber is stretched；
Wherein, sfibertail (ii) is the abscissa of the right head end of buckling fiber type, holdstate (jj)=lmax+(jj-1)
× A, jj are carding times, lmaxFor the length of longest fiber, unit mm, A are to give cotton length, unit mm, fiberj (ii)
For the ordinate of the i-th i root fiber, sfiberhead (ii) is the abscissa of the left head end of buckling fiber type, wfibertail
It (ii) is the abscissa of the right head end of crotch fiber type, hooktail (ii) is the horizontal seat of the right head end of crotch before the i-th i root fiber
Mark, wfiberhead (ii) are the abscissa of the left head end of crotch fiber type；
(3) cylinder circulation combing simulation；
Fiber separation: judging whether the abscissa of the left head end of the fiber after being combed is located in [xchead, xchead+A], such as
Fruit is that fiber is then delivered to cotton net, conversely, then without processing, xchead=holdstate (jj)-L, L=B+12.5+
(1-K) × A, B are detaching distance, and unit mm, K are to give cotton coefficient, 0 < K≤1；
Time and again repeat: cotton layer repeats step (2) to the distance of outbound course displacement A, until jaw line reaches LS-lmaxPosition, Ls
For cotton synusia segment length, unit mm；
(4) in combing inspection target calculating；
Linters rate Q2, noil short fiber content SfNoilWith yarn short fiber content SfYarnCalculation formula it is as follows:
In formula, w1For the sum of the weight of fiber for entering noil, w2For the sum of the weight of fiber for not entering noil, single fiber
Weight be equal to single fiber length and single fiber fineness product, S1、S2、S3、….、SG+1For by the every Δ mm of noil
Length is divided into one group, total R group, and R × Δ > lmax, 0~Δ for being calculated, Δ~2 Δs, 2 Δs~3 Δs ..., G Δ~16mm
The weight of long fiber accounts for the percentage of yarn total weight, S1’、S2’、S3’、….、SG+1' it is by the every Δ mm length of yarn
It is divided into one group, total R group, and R × Δ > lmax, 0~Δ for being calculated, Δ~2 Δs, 2 Δs~3 Δs ..., G Δ~16mm's
The weight of fiber accounts for the percentage of yarn total weight, and G is that 16/ Δ is rounded downwards；
B) combing parameter is determined；
Firstly, generating multiple needle transverse tooth thickness degree, needle tooth tooth pitch, detaching distance and to cotton length, needle tooth tooth pitch includes the first combing area
Needle tooth tooth pitch, second combing area's needle tooth tooth pitch, third combing area's needle tooth tooth pitch, the 4th combing area's needle tooth tooth pitch and the 5th combing area
Needle tooth tooth pitch, needle transverse tooth thickness degree, first combing area's needle tooth tooth pitch, second combing area's needle tooth tooth pitch, third combing area's needle tooth tooth pitch, the
Four combing area's needle tooth tooth pitches and the 5th combing area's needle tooth tooth pitch value range respectively correspond for 0.10~0.35mm, 0.75~
0.85mm, 0.6~0.7mm, 0.55~0.6mm, 0.4~0.5mm and 0.3~0.4mm, detaching distance 8mm, 10mm, 12mm,
It is 4.7mm, 5.2mm, 5.9mm to cotton length, is combined needle transverse tooth thickness degree, needle tooth tooth pitch, detaching distance and to cotton length
To multiple groups combing parameter；
Then, the corresponding linters rate Q of every group of combing parameter is obtained by the simulation process of step a)2, noil short fiber content SfNoil
With yarn short fiber content SfYarn；
Then, according to the number for the yarn to be spinned, determine the range of linters rate, filter out corresponding linters rate meet the requirements it is several
Group combing parameter, when number is 30~14tex, linters rate is 14~16%；When number is 14~10tex, noil
Rate is 15~18%；When number is 10~6tex, linters rate is 17~20%；As number<6tex, linters rate>19%；
Then, corresponding noil short fiber content Sf is filtered outNoilSeveral groups of combing parameters greater than 60%；
Finally, filtering out corresponding yarn short fiber content SfYarnClosest to one group of combing work of obtained yarn short fiber content
Skill parameter.
2. the combing parameter determination method of the combing simulation according to claim 1 based on fiber alignment, feature
It is, specific step is as follows for the simulation of feeding combed cotton layer:
(1.1) length of every fiber in cotton layer is generated；
(1.2) fineness of every fiber in cotton layer is generated；
(1.3) hook-type and coordinate of every fiber are determined；
(1.4) feeding combed cotton layer is generated.
3. the combing parameter determination method of the combing simulation according to claim 2 based on fiber alignment, feature
It is, the detailed process of step (1.1) are as follows:
The length frequency histogram of combing rouleau is obtained by test first, for the group of length frequency histogram away from being d, group number is m,
The area of each group rectangle is Piii, iii=1,2 ... k ..., m；
Then the random number r between 0 to 1 is generated1e；
Then determination meets bk≤r1e<bk+1BkAnd bk+1,
Finally by formulaFibre length L is calculated；
By this process, random number r is generated respectively11、r12、…、r1e、...、r1N, can sequentially generate the 1st, 2 ..., e ..., N root
The length of fiber.
4. the combing parameter determination method of the combing simulation according to claim 3 based on fiber alignment, feature
It is, the detailed process of step (1.2) are as follows:
The fineness frequency histogram of combing rouleau is obtained by test first, away from being c, group number is for the group of fineness frequency histogram
M ', the area of each group rectangle are Qiii’, iii '=1,2 ... k ' ..., m '；
Then the random number r between 0 to 1 is generated2e’；
Then determination meets dk’≤r2e’<dk’+1Dk’And dk’+1,
Finally by formulaFibre fineness fin is calculated；
By this process, random number r is generated respectively21、r22、…、r2e’、...、r2N, can sequentially generate the 1st, 2 ..., e ' ..., N
The fineness of root fiber.
5. the combing parameter determination method of the combing simulation according to claim 4 based on fiber alignment, feature
It is, the detailed process of step (1.3) are as follows:
With the outbound course of cotton layer, the actual form of fiber in cotton layer is divided into preceding crotch, rear crotch, both ends crotch and buckling type
Four classes, the ratio that quantity accounts for fiber sum is respectively P1、P2、P3、P4, then the 1st to P1× N root fiber is leading hooked fibre, the
P1× N+1 to (P1+P2) × N root fiber is trailing hooked fibre, and so on, determine the hook-type of every fiber；
The head end coordinate of buckling fiber type is determined in the combed cotton layer coordinate: generate random number r in [0,1] section and
Rr, left head end coordinate are (r × Ls, rr × H), right head end coordinate is (r × Ls+li× η, rr × H), wherein H is the width of cotton layer
Degree, unit mm, liFor the length of fiber, unit mm, η are degree of the stretching coefficient of fiber；
The coordinate of crotch fiber type is determined in the combed cotton layer coordinate:
The left head end coordinate of main body and the right head end coordinate of main body for first determining crotch fiber type, determine method respectively with buckling fiber type
Left head end coordinate and right head end coordinate；
Determine that the hook heads of crotch fiber type sit up straight mark again, the ordinate of all crotch head ends is left with the main body of crotch fiber type
The ordinate of head end, when fiber is both ends crotch, the abscissa hookhead1 (ii) of the preceding left head end of crotch is the same as crotch fiber type
The left head end of main body abscissa, abscissa hooktail1 (ii)=hookhead1 (ii)+(the 1- η) of the preceding right head end of crotch ×
li× α, α are the random number in [0,1] section, and the abscissa hooktail2 (ii) of the rear right head end of crotch is the same as crotch fiber type
The right head end of main body abscissa, abscissa hookhead2 (ii)=hooktail2 (ii)-(1- η) of the rear left head end of crotch ×
li×(1-α)；When fiber is preceding crotch, the abscissa of the preceding right head end of crotch is hooktail1 (ii)=hookhead1 (ii)
+(1-η)×li；When fiber is rear crotch, the abscissa of the rear left head end of crotch is hookhead2 (ii)=hooktail2
(ii)-(1-η)×li。
6. the combing parameter determination method of the combing simulation according to claim 5 based on fiber alignment, feature
It is, the detailed process of step (1.4) are as follows:
The left head end of buckling fiber type is connected with right head end, the left head end of the main body of crotch fiber type and the right head end of main body are connected
It connects, the right head end of preceding crotch is connected with the left head end of preceding crotch, while the right head end of rear crotch being connected with the left head end of rear crotch.
7. the combing parameter determination method of the combing simulation according to claim 6 based on fiber alignment, feature
It is, all random numbers are generated by the rand function of Matlab.
8. the combing parameter determination method of the combing simulation according to claim 1 based on fiber alignment, feature
It is, Δ 2.
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