CN102704052B - Method for determining gathering bell mouth position on detaching roller output web of combing machine - Google Patents

Method for determining gathering bell mouth position on detaching roller output web of combing machine Download PDF

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CN102704052B
CN102704052B CN201210180221.2A CN201210180221A CN102704052B CN 102704052 B CN102704052 B CN 102704052B CN 201210180221 A CN201210180221 A CN 201210180221A CN 102704052 B CN102704052 B CN 102704052B
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web
weight
output
detaching roller
roller
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CN102704052A (en
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任家智
贾国欣
张一风
任毅
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Zhongyuan University of Technology
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Abstract

The invention discloses a method for determining a gathering bell mouth position on a detaching roller output web of a combing machine. The method comprises the following steps of: calculating a weight distribution curve in the length direction of a detaching cluster by using a segmental weighing method; (2) calculating the weight distribution curve of the detaching roller output web; (3) calculating a distance between each segment of web and a bell mouth; (4) calculating the total weight yc of the web at a point C; (5) calculating the weight CV (%) value of an output combed sliver; (6) setting values a and b according to the effective output length of a detaching roller of the combing machine, calculating the weight of an output sliver, and determining the position of the bell mouth, i.e., the values a and b by taking a minimum weight CV (%) value of the sliver as an optimization target. The position of the bell mouth, i.e., the values a and b is determined by taking the minimum weight CV (%) value of the bell mouth output combed sliver as the optimization target, so that the uniformity and quality of the output combed sliver of the combing machine are ensured.

Description

A kind of combing machine detaching roller output web gathers horn mouth method for determining position
Technical field
The invention belongs to Combing technology, be specifically related to a kind of method that definite combing machine detaching roller output web gathers horn mouth position.
Background technology
By many one threads, feed together drafter, be called and close.In coalescence process, exist thick section of chance of meeting with another root thin segment of a bar, therefore and close the irregularity that can reduce product, improve the uniformity of product.At British scholar P.F. Ge Leixin in 1932 according to the probability nature of independent variable and mathematical statistics method, suppose to have the feeding of n one thread, and when the irregularity of each one thread all equates, drawn famous and closed law: the irregularity of output strip has equaled to feed the irregularity of strip
Figure 900138DEST_PATH_IMAGE001
doubly, strip and to close root more, the uniformity of product is improved more obvious.And close law and explained that well many one threads are random and closed the irregularity of rear product and and close according to the relation of the irregularity of number and feeding strip.
The fibre bundle that combing machine is sent nipper here at each working cycles detaching roller is exported fast, produces one and separates clump.In each work, follow detaching roller and the separation clump of a upper working cycles can be poured into the new cotton clump overlap joint of crossing with Cylinder Carding in machine, therefore the web thickness (being the weight of unit length) of detaching roller output is periodic variation, and its Cycle Length equals the web length (being the effective length of delivery of detaching roller) that each work follows output.
The width of combing machine detaching roller (being delivery roller) output web is about 300mm, by cotton guiding plate, converges at horn mouth, becomes yarn.The weight of exporting in the unit length of the horizontal each point web of detaching roller is identical, owing to not arriving bell-mouthed distance not etc., be positioned at varying in weight of the each section of web in horn mouth place, the chance that has emphatically section web and light section and close, thus the uniformity of horn mouth output strip is improved.Because the web distribution of weight of detaching roller output presents periodically, the variation of regularity, its period of change equals the effective length of delivery of detaching roller, therefore and the relation of closing forward and backward web weight unevenness can not use simply and close law and calculate, it is relevant with bell-mouthed installation site.
How to confirm horn mouth position when combing machine web output mechanism designs, rationally determine bell-mouthed horizontal and along slope coordinate parameter, make the irregularity of horn mouth output yarn reach minimum of a value, even if the evenness quality of yarn is best, lack at present effective method and means.
Summary of the invention
The technical problem to be solved in the present invention does not have effective means to determine bell-mouthed rational position while being combing machine use, provide a kind of combing machine detaching roller output web to gather horn mouth method for determining position, can improve significantly the merging effect of detaching roller output web, improve the uniformity of horn mouth output yarn.
Technical scheme of the present invention realizes in the following manner: a kind of combing machine detaching roller output web gathers horn mouth method for determining position, according to following step, carry out: (1) separates the weight distribution curve on clump length direction with the measuring and calculating of sectional-weighing method, concrete grammar is that carbon paper is placed between rear detaching roller and separation roller, complete a working cycles with hand rotary machine, obtain a complete separation clump; Get the web of certain width separating on clump, on its length direction, by weighing after equal length segment, then be converted to the weight of whole separation Cong Kuandu, can obtain separating clump weight distribution curve in the longitudinal direction;
(2) weight distribution curve of measuring and calculating detaching roller output web, concrete grammar is that the effective length of delivery that first each separation clump is equaled to detaching roller by head end spacing overlaps, measuring and calculating separates the weight distribution curve of clump again, and each weight distribution curve stack that separates clump is calculated to the weight distribution curve that obtains detaching roller output web, its distributed model is
Wherein y(x) be the weight of detaching roller output web unit length, g 0for the average weight of web unit length, the amplitude that k is curve, S is the web length of the each working cycles output of detaching roller, and x is web length;
(3) calculate every section of web and arrive bell-mouthed distance, concrete grammar is: the width at detaching roller output web is divided into m section, the web of being exported by detaching roller outputs to horn mouth C and closes through outlet roller OD, take O as initial point, if B is that the coordinate of output web width, horn mouth C is (a, b), B is divided into m section, j (the distance A that 1≤j≤m) section web is ordered to C jfor
When
Figure 585514DEST_PATH_IMAGE003
time,
Figure 260209DEST_PATH_IMAGE004
When
Figure 721277DEST_PATH_IMAGE005
time,
Figure 151121DEST_PATH_IMAGE006
(4) calculate C point web gross weight y c
If the distance of passing by when the j section web on OD straight line arrives C point by OD is
Figure 333360DEST_PATH_IMAGE007
,
Figure 608483DEST_PATH_IMAGE008
weight when section web arrives C point
Figure 189637DEST_PATH_IMAGE009
for:
C point web gross weight y ccan be expressed as:
Figure 191408DEST_PATH_IMAGE011
(5) this calculates output yarn weight CV(%) value;
Figure 207906DEST_PATH_IMAGE012
Total hop count that wherein n is sliver.
(6) according to the effective length of delivery of combing machine detaching roller, and set a, b value, calculate output sliver weight, and take sliver weight CV(%) value minimum of a value is as optimization aim, determines bell-mouthed position, i.e. the value of definite a and b.
The present invention is take horn mouth output yarn weight CV(%) value is minimum as optimization aim, and determine and export bell-mouthed position, i.e. the value of a and b, thus guaranteed that combing machine exports the uniformity and the quality of yarn.
Accompanying drawing explanation
Fig. 1 is fibre bundle overlap joint schematic diagram.
Fig. 2 is output web merging process schematic diagram.
Fig. 3 is horn mouth position a and sliver CV(%) graph of a relation of value.
Fig. 4 is horn mouth position b and sliver CV(%) graph of a relation of value.
Fig. 5 is the weight changing curve of detaching roller output web and horn mouth output yarn.
The specific embodiment
A kind of combing machine detaching roller output web gathers horn mouth method for determining position, according to following step, carries out:
(1) with the measuring and calculating of sectional-weighing method, separate the weight distribution curve on clump length direction, concrete grammar is that carbon paper is placed between rear detaching roller and separation roller, completes a working cycles with hand rotary machine, obtains a complete separation clump; Get the web of certain width separating on clump, on its length direction, by weighing after equal length segment, then be converted to the weight of whole separation Cong Kuandu, can obtain separating clump weight distribution curve in the longitudinal direction;
(2) weight distribution curve of measuring and calculating detaching roller output web, concrete grammar is according to the separation rules of engagement of combing machine and the effective length of delivery of detaching roller, the effective length of delivery that first each separation clump is equaled to detaching roller by head end spacing overlaps, and each weight distribution curve stack that separates clump is calculated to the weight distribution curve that obtains detaching roller output web, the overlapping mode of fibre bundle as shown in Figure 1, if L is for separating Cong Changdu, S is effective length of delivery, G is bonding length, and three's relation is shown in (1) formula; Detaching roller is exported to the Mathematical Modeling of the weight distribution curve matching of web and is seen (2) formula:
（1）
Figure 415213DEST_PATH_IMAGE014
（2）
Wherein y(x) be the weight of detaching roller output web unit length, unit is g/mm; g 0for the average weight of web unit length, unit is g/mm; K is the amplitude of curve, and unit is g/mm; S is the web length of the each working cycles output of detaching roller, i.e. the sinusoidal cycle, unit is mm; X is web length, and unit is mm;
(3) calculate every section of web and arrive bell-mouthed distance, concrete grammar is: the width at detaching roller output web is divided into m section, according to the geometrical relationship of delivery roller and horn mouth position, as shown in Figure 2, after Cylinder Carding, the web of being exported by detaching roller outputs to horn mouth C and closes through outlet roller OD, take O as initial point, the coordinate of establishing B and be output web width, horn mouth C is (a, b), B is divided into m section, j (the distance A that 1≤j≤m) section web is ordered to C jfor:
When
Figure 365852DEST_PATH_IMAGE015
time,
Figure 186040DEST_PATH_IMAGE004
(3)
When time,
Figure 418756DEST_PATH_IMAGE006
(4)
(4) calculate C point web gross weight y c
Weight while calculating j section arrival C point and the distribution of weight of C point sliver.The weight of j section web on OD line
Figure 794373DEST_PATH_IMAGE017
be expressed as:
Figure 214990DEST_PATH_IMAGE018
（5）
If the distance of passing by when the j section web on OD straight line arrives C point by OD is
Figure 622313DEST_PATH_IMAGE007
, weight when section web arrives C point
Figure 598677DEST_PATH_IMAGE009
for:
（6）
C point web gross weight y ccan be expressed as:
Figure 822165DEST_PATH_IMAGE011
（7）
(5) this calculates output yarn weight CV(%) value;
Figure 44199DEST_PATH_IMAGE012
（8）
Wherein, total hop count that n is sliver;
(6) according to the effective length of delivery of combing machine detaching roller, and set a, b value, utilize computer and programmed method to calculate output sliver weight, and take sliver weight CV(%) value minimum of a value is as optimization aim, determines bell-mouthed position, i.e. the value of definite a and b.
The invention provides combing machine detaching roller output web, to gather horn mouth method for determining position example as follows:
In the combing of FA261 type, the effective length of delivery S of detaching roller is 31.71mm, and the width B of the output web of detaching roller is 300mm, and will be 10mm decile by j, and m is 30; The average weight that records detaching roller output web is g 0for 0.05g/mm, the extreme difference value k of arbitrary section of web and average weight is 0.017 g/mm; The Mathematical Modeling of detaching roller output web weight distribution curve is:
Figure 456725DEST_PATH_IMAGE019
（9）
Delivery roller laterally arbitrary section of web arrives horn mouth apart from being:
When
Figure 422407DEST_PATH_IMAGE020
time:
Figure 541673DEST_PATH_IMAGE021
（10）
When
Figure 731346DEST_PATH_IMAGE022
time:
Figure 568852DEST_PATH_IMAGE023
（11）
Weight when the horizontal arbitrary section of web of delivery roller arrives horn mouth is:
Figure 134963DEST_PATH_IMAGE024
（12）
Web gross weight y on horn mouth cbe shown:
Figure 374314DEST_PATH_IMAGE025
（13）
Get b=0, a=0,1,2,3 ..., 100, according to (9), (10), (11), (12), (13) and (8) formula, utilize computer programming to calculate to such an extent that the weight CV% of horn mouth output yarn is shown in Fig. 3.As shown in Figure 3: when a=22mm, the weight CV% of horn mouth output yarn has minimum of a value, but now a value is too little, is awkward; Therefore choose a=59mm.
Get a=59mm, b=0,1,2,3 ..., 300, according to (9), (10), (11), (12), (13) and (8) formula, utilize computer programming to calculate to such an extent that the weight CV% of horn mouth output yarn is shown in Fig. 4.As shown in Figure 4: when b=0, the weight CV% of horn mouth output yarn has minimum of a value.
Therefore, when bell-mouthed position C point coordinates is (59,0), the dry CV% minimum of bar of combing machine output yarn, the uniformity of product is best.Calculate thus to such an extent that the weight distribution curve of detaching roller output web and horn mouth output yarn is shown in Fig. 5, the weight CV of detaching roller output web is 17.4%, and the weight CV of horn mouth output yarn is 0.74%.

Claims (1)

1. combing machine detaching roller output web gathers a horn mouth method for determining position, according to following step, carries out:
(1) with the measuring and calculating of sectional-weighing method, separate the weight distribution curve on clump length direction, concrete grammar is that carbon paper is placed between rear detaching roller and separation roller, completes a working cycles with hand rotary machine, obtains a complete separation clump; Get the web of certain width separating on clump, on its length direction, by weighing after equal length segment, then be converted to the weight of whole separation Cong Kuandu, can obtain separating clump weight distribution curve in the longitudinal direction;
(2) weight distribution curve of measuring and calculating detaching roller output web, concrete grammar is according to the separation rules of engagement of combing machine and the effective length of delivery of detaching roller, the effective length of delivery that first each separation clump is equaled to detaching roller by head end spacing overlaps, and each weight distribution curve stack that separates clump is calculated to the weight distribution curve that obtains detaching roller output web, if L is for separating Cong Changdu, S is effective length of delivery, and G is bonding length, and three's relation is shown in (1) formula; Detaching roller is exported to the Mathematical Modeling of the weight distribution curve matching of web and is seen (2) formula:
L=S+G （1）
Figure 2012101802212100001DEST_PATH_IMAGE001
（2）
Wherein y(x) be the weight of detaching roller output web unit length, unit is g/mm; g 0for the average weight of web unit length, unit is g/mm; K is the extreme difference value of arbitrary section of web and average weight, and unit is g/mm; S is the web length of the each working cycles output of detaching roller, i.e. the sinusoidal cycle, unit is mm; X is web length, and unit is mm;
(3) calculate every section of web and arrive bell-mouthed distance, concrete grammar is: the width at detaching roller output web is divided into m section, according to the geometrical relationship of delivery roller and horn mouth position, after Cylinder Carding, the web of being exported by detaching roller outputs to horn mouth C and closes through outlet roller OD, take O as initial point; O point is the left end point of outlet roller OD axis, and X-axis is perpendicular to the axis of outlet roller OD, and web outbound course is positive direction; Y-axis is along outlet roller OD axis, and X-axis, Y-axis form rectangular coordinate system; B is that the coordinate of output web width, horn mouth C is (a, b), and B is divided into m section, j (the distance A that 1≤j≤m) section web is ordered to C jfor:
When
Figure 2012101802212100001DEST_PATH_IMAGE002
time,
Figure 2012101802212100001DEST_PATH_IMAGE003
(3)
When time,
Figure 2012101802212100001DEST_PATH_IMAGE005
(4)
(4) calculate C point web gross weight y c
Weight while calculating j section arrival C point and the distribution of weight of C point sliver; The weight y of the j section web on OD line j(x) be expressed as:
Figure 2012101802212100001DEST_PATH_IMAGE006
（5）
If the distance of passing by when the j section web on OD straight line arrives C point by OD is A j, weight y when j section web arrives C point j(x) be:
Figure 2012101802212100001DEST_PATH_IMAGE007
（6）
C point web gross weight y cbe expressed as:
Figure 2012101802212100001DEST_PATH_IMAGE008
（7）
(5) calculate output yarn weight CV(%) value;
Figure 2012101802212100001DEST_PATH_IMAGE009
（8）
Wherein, total hop count that n is sliver;
(6) according to the effective length of delivery of combing machine detaching roller, and set a, b value, utilize computer and programmed method to calculate output sliver weight, and take sliver weight CV(%) value minimum of a value is as optimization aim, determines bell-mouthed position, i.e. the value of definite a and b.
CN201210180221.2A 2012-06-04 2012-06-04 Method for determining gathering bell mouth position on detaching roller output web of combing machine Expired - Fee Related CN102704052B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0450410A1 (en) * 1990-04-05 1991-10-09 Maschinenfabrik Rieter Ag Combing machine
CN102115928A (en) * 2011-04-11 2011-07-06 东华大学 Digitally independently driven separation roller motion device for combing machine
CN102264958A (en) * 2008-10-24 2011-11-30 里特机械公司 Device for pressure loading pull-off roller of combing machine
CN102453981A (en) * 2010-10-22 2012-05-16 株式会社丰田自动织机 Movement setting device for detaching roller of comber

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPO359896A0 (en) * 1996-11-14 1996-12-05 Commonwealth Scientific And Industrial Research Organisation Tuft tail control in textile combing
ITMI20081097A1 (en) * 2007-06-29 2008-12-30 Truetzschler Gmbh & Co Kg EQUIPMENT FOR THE FIBER SORTING OR THE FIBER SELECTION OF A FIBER BAND INCLUDING TEXTILE FIBERS, ESPECIALLY FOR COMBING

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0450410A1 (en) * 1990-04-05 1991-10-09 Maschinenfabrik Rieter Ag Combing machine
CN102264958A (en) * 2008-10-24 2011-11-30 里特机械公司 Device for pressure loading pull-off roller of combing machine
CN102453981A (en) * 2010-10-22 2012-05-16 株式会社丰田自动织机 Movement setting device for detaching roller of comber
CN102115928A (en) * 2011-04-11 2011-07-06 东华大学 Digitally independently driven separation roller motion device for combing machine

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
任家智，张一风.精梳机工艺技术与质量分析.《棉纺织技术》.2011,第39卷(第10期),第19-22页. *
杨锁廷.精梳.《纺纱学》.中国纺织出版社,2004,(第1版),第145-171页. *

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