CN111636155B - Buttonhole bottom line consumption calculation method of buttonholing machine - Google Patents

Buttonhole bottom line consumption calculation method of buttonholing machine Download PDF

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CN111636155B
CN111636155B CN202010517890.9A CN202010517890A CN111636155B CN 111636155 B CN111636155 B CN 111636155B CN 202010517890 A CN202010517890 A CN 202010517890A CN 111636155 B CN111636155 B CN 111636155B
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keyhole
consumption
shape
stitch
knot
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CN111636155A (en
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陈海强
蔡锦飚
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Bullmer Electromechanical Technology Co Ltd
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B59/00—Applications of bobbin-winding or -changing devices; Indicating or control devices associated therewith
    • D05B59/02—Devices for determining or indicating the length of thread still on the bobbin

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Abstract

The invention provides a buttonhole bottom thread consumption calculation method of a buttonholing machine, and belongs to the technical field of sewing equipment. The method solves the problem that the existing method for calculating the consumption of the bottom line of the keyhole is complex. The calculation method of the consumption of the bottom line of the keyhole comprises the following stepsThe following steps: s1, identifying a current keyhole shape combination, wherein the keyhole shape combination is composed of a left wrapping edge, a right wrapping edge, an upper sleeve knot and a lower sleeve knot, and calling a linear quantity consumption calculation formula corresponding to each module in the four structure modules; s2, obtaining the keyhole parameter corresponding to the recognized current keyhole shape combination, and calculating S0And the thread amount L required for lower sewing: s0＝ELeft side of+ERight side+EUpper noose+ELower noose；L＝(I+N1+N2+M1+M2+5) × 2 × n; s3, calculating the current consumption S of the bottom thread of the keyhole according to the stitch form of the keyhole sewing: s ═ S0X y + L. The calculation method has the advantages of convenience, simplicity, accuracy and wide application range.

Description

Buttonhole bottom line consumption calculation method of buttonholing machine
Technical Field
The invention belongs to the technical field of sewing equipment, and relates to a buttonhole bottom thread consumption calculation method of a buttonhole sewing machine.
Background
The buttonhole sewing machine is mainly used for processing buttonholes in various clothes, is divided into a straight buttonhole sewing machine (straight buttonhole sewing machine) and a round buttonhole sewing machine (eyelet buttonhole sewing machine), is divided into a ending part and a non-ending part, and is a special device which is very important in clothing machinery. The buttonhole maker system generally comprises nine major mechanisms, namely a feeding mechanism, a crochet hook mechanism, a needle rod mechanism, a stretching mechanism, a hook shuttle mechanism, an upper cutter mechanism, a sliding table mechanism, a thread separating mechanism and an automatic upper thread cutting device. Each set of mechanism has the characteristics and functions of the mechanism, has relative independence, but is closely matched and coordinated in work.
The buttonhole sewing machine generally adopts a swinging needle rod, a double curved needle, a double fork needle for hooking a thread and a double thread for overedging and sewing a composite chain stitch. The elastic presser foot structure of the buttonholing machine is automatically suitable for clamping different fabric thicknesses. The operator can realize sewing buttonholes with various shapes and sizes by simply exchanging the two cams. The operation is convenient, the length of the upper thread required by proper initial sewing is reserved, and the buttonhole sewing is ensured.
When the buttonhole sewing machine works, the residual thread amount of the bobbin thread on the bobbin is difficult to observe due to the installation position of the rotating shuttle and the structure of related parts. When the bottom thread is used up, if the operating personnel do not replace the shuttle peg which uses up the bottom thread in time, the empty needle phenomenon can occur, thereby causing frequent reworking of the sewing product and waste of high-grade fabrics. Therefore, it is required that the bobbin thread residue amount is left at the end of sewing and should satisfy the design requirement, and the bobbin thread residue amount of the buttonholing machine is different according to the consumption amount of the buttonholing (the length of the bottom thread required for sewing a buttonholing). Therefore, accurate detection of the amount of consumption of the keyhole bobbin thread is important for the control of the amount of bobbin thread remaining as described above.
However, for example, the 1790 buttonhole sewing machine can preset 26 basic buttonhole shapes and 4 reinforcing seam shapes which are commonly used for sewing and VDT sewing input after the shapes are designed from the outside, and the above sewing covers all types of buttonhole sewing of the buttonhole sewing machine. Even if the main parameters (cloth cutting width, left and right edge covering size, needle pitch and the like) are the same among the 26 types of keyhole shapes, the consumption of the bottom thread of the keyhole is not the same, and the consumption of the bottom thread of the keyhole is also influenced by the factors of the keyhole shape, the keyhole size and the keyhole sewing form (including stitch type, whether to make a bottom seam, whether to double seam and the like), so that great difficulty is brought to accurate detection of the consumption of the bottom thread of the keyhole.
In order to solve the above problems, a chinese patent with publication No. CN111005165A, entitled keyhole bobbin thread consumption amount calculation method and bobbin excess thread amount control method is disclosed, which discloses a keyhole bobbin thread consumption amount calculation method for calculating the keyhole bobbin thread consumption amounts of different keyhole shapes under different keyhole sewing forms and keyhole sizes, and is characterized in that: the method comprises the following steps: a1, determining a reference bottom line quantity M and a unit bottom line increment B of different keyhole shapes when no bottom seam is sewn through measurement, wherein the reference bottom line quantity M is the bottom line length required by sewing one keyhole under the conditions of the minimum cloth cutting length Imin and the measured needle pitch P0, and the unit bottom line increment B is the bottom line length increment required when the unit cloth cutting length is increased on the basis of the minimum cloth cutting length Imin; a2, calculating the length of a bottom thread S0 required by one lock hole of a flat stitch when no bottom seam is added and the thread amount L required by a lower seam according to the shape of the lock hole to be sewn, the length I of the cut cloth and the stitch length P of the lock hole: l is (I +5) × 2n, where δ is the linear quantity safety factor and n is the seam allowance times; a3, calculating consumption S of bottom thread of the keyhole according to the sewing form of the keyhole: s is S0 x y + L, where x is 1 and y is 1 when backing stitch is added, x is 1.8 and y is 1 when backing stitch is added; the double seam with flat stitch is x is 1, y is 2, the double seam with triangular stitch is x is 1.8, y is 2. Although the technical scheme can detect the consumption of the keyhole ground line to a certain extent, the calculation mode is complex, and the method cannot be applied to calculation of the consumption of the keyhole ground line of the keyhole of reinforcing seams and other types.
Disclosure of Invention
The invention aims to solve the technical problems and provides a buttonholing consumption calculation method of a buttonholing machine.
The purpose of the invention can be realized by the following technical scheme: a buttonhole bottom line consumption calculation method of a buttonholing machine is characterized by comprising the following steps:
s1, identifying the current keyhole shape combination, wherein the keyhole shape combination is composed of four structure modules of a left edge covering, a right edge covering, an upper sleeve knot and a lower sleeve knot, and calling a linear consumption calculation formula corresponding to each of the four structure modules, wherein the specific formula is as follows:
Figure GDA0003243666420000031
Figure GDA0003243666420000032
wherein E isLeft side ofAnd ERight sideThe consumption of the bottom line of the left edge covering and the consumption of the bottom line of the right edge covering are respectively; i is the cut length, N1Is the keyhole first gap distance, N2For a second clearance distance of the keyhole, M1For the length of the upper hitching knot in the direction of the keyhole, M2The length of the lower hitching knot along the keyhole direction, Q is the ratio value of the edge covering shape, T is the edge covering width, delta is the cloth thickness, PWrapping edgeThe stitch length of the keyhole wrapping is used;
consumption of bottom line of upper sleeve knot EUpper nooseAnd the amount of bottom line consumption E of lower jacketingLower nooseThe thread consumption calculation formula calls a corresponding calculation formula according to the specific nesting patterns of the upper nesting and the lower nesting identified in the current keyhole shape combination;
s2, obtaining the corresponding identifiedThe keyhole parameters of the current keyhole shape combination are combined with the calculation formula in step S1 to respectively calculate ELeft side of、ERight side、EUpper nooseAnd ELower nooseAnd respectively calculate S by the following formula0And the thread amount L required for lower sewing:
S0＝Eleft side of+ERight side+EUpper noose+ELower noose；
L＝(I+N1+N2+M1+M2+5)*2*n；
Wherein n is the sewing times;
s3, calculating the current consumption S of the bottom thread of the keyhole according to the stitch form of the keyhole sewing:
S＝S0*x*y+L；
when the keyhole stitch is a plain stitch, x is 1, y is 1, and when the keyhole stitch is a plain stitch, x is 1, and y is 2; when the keyhole stitch is a triangle stitch, x is 1.8, y is 1, and when the keyhole stitch is a triangle stitch double stitch, x is 1.8, and y is 2.
In the above method for calculating consumption of bottom line of buttonhole sewing machine, the hitching patterns in step S1 include flat hitches, radial hitches, round hitches, tapered reinforced hitches, semi-round hitches, and straight reinforced hitches, and the bottom line consumption calculation formula corresponding to each hitching pattern is as follows:
Figure GDA0003243666420000041
Eradiation＝[7+4×(B-1)]×(T+δ)
ERound eye＝[7+4×(B-1)]×(T+δ)
Figure GDA0003243666420000042
Figure GDA0003243666420000043
Figure GDA0003243666420000044
Figure GDA0003243666420000045
Wherein E isFlat plateThe looping pattern is the loop bottom line consumption of the flat-head loop, ERadiationThe hitch pattern is the bottom thread consumption of the radioactive hitch, ERound eyeThe consumption of the knotting base line of the knotting pattern is a round eye-shaped knotting, EConical reinforcementThe amount of consumption of the hitching base line of the taper-shaped reinforcement type hitches is the hitching pattern, ESemi-circleThe looping pattern is the loop bottom line consumption of the semicircular loopRound (T-shaped)The looping pattern is the loop bottom line consumption of the round loop, EStraight line reinforcementThe looping pattern is the consumption of the looping bottom line of the straight-line reinforced loop, MiWherein i is selected according to the actual position of the noose, i is the upper noose when i is 1, i is the lower noose when i is 2, B is the needle number of the radial (circular) shape noose, and PNooseThe stitch length is the keyhole and the hitch stitch length.
In the above method for calculating consumption of bottom line of keyhole machine, the parameters of keyhole in step S2 include the length of cloth cut I and the first clearance distance N of keyhole1A second keyhole clearance distance N2Length M of upper hitching knot along the direction of keyhole1The length M of the lower slip knot along the direction of the keyhole2Edge-covering shape ratio value Q, edge-covering width T, cloth thickness delta and keyhole edge-covering needle pitch PWrapping edgeNumber of needles B of radial (circular) shape noose and stitch length P of keyhole nooseNooseAnd the number of times of sewing down n.
In the above method for calculating consumption of a keyhole bottom line of a buttonholing machine, the step S1 of identifying a current keyhole shape combination specifically includes: acquiring a current keyhole shape image in an image acquisition mode, splitting four module shape images of a left edge covering, a right edge covering, an upper hitching knot and a lower hitching knot, comparing the four module shape images with each set shape module which is stored in an electric control unit of the keyhole machine in advance and can be combined into the keyhole with different shapes, and screening the set shape modules with the same shape as the left edge covering, the right edge covering, the upper hitching knot and the lower hitching knot corresponding to the current keyhole so as to identify the shape combination of the left edge covering, the right edge covering, the upper hitching knot and the lower hitching knot of the current keyhole; or, the operator inputs the corresponding set shape module parameter to the buttonholing machine according to the current buttonholing shape so as to enable the buttonholing machine to electrically identify the current buttonholing shape combination.
In the above method for calculating consumption of a keyhole base line of a keyhole machine, the step S2 of obtaining a keyhole parameter corresponding to the identified current keyhole shape combination specifically includes: automatically acquiring each keyhole parameter corresponding to the keyhole shape combination stored in the electric control of the keyhole machine in advance through the recognized keyhole shape combination; or, the operator inputs each keyhole parameter corresponding to the current keyhole shape to the keyhole machine to electrically control the keyhole machine to obtain the corresponding keyhole parameter.
In the above method for calculating the consumption of the buttonholing thread of the buttonholing machine, the upper hitches and the lower hitches in step S1 have the same shape and the same stitches.
Compared with the prior art, the calculation method has the following advantages:
1. the lock hole is divided into four independent structure modules, namely a left edge covering module, a right edge covering module, an upper sleeve knot and a lower sleeve knot, all shapes commonly used by the lock hole can be obtained by different combinations of the four independent structure modules, and the consumption of the bottom line of the corresponding lock hole can be conveniently and simply calculated by calculating the consumption of the bottom line of each of the four independent structure modules; the calculation method calculates the consumption of the bottom line of the keyhole by calculating the consumption of the bottom line of each of four independent structure modules, flexibly calls the calculation formula combination of each structure module according to the keyhole pattern arrangement, and is suitable for sewing all types of keyholes and all preset patterns including reinforced seams;
2. the calculation method is suitable for calculating the consumption of the keyhole base threads of sewing stitches including a flat stitch, a triangular stitch, a double stitch, a back stitch and the like, and calculating the consumption of the keyhole base threads of any size in a sewing range, so that the application range is wide;
3. the bottom line consumption of the four independent structure modules is a calculation method based on the number of needles, the calculation method is more sensitive to the change of keyhole parameters, and the calculation result is more accurate.
Drawings
FIG. 1 is a flow chart of the present calculation method.
FIG. 2 is a view showing the structure of a keyhole in which upper and lower hitches are flat hitches,
FIG. 3 is a structural view of a hitch pattern in which upper and lower hitches of a keyhole are different structures.
In the figure, 1, left edge covering; 2. right wrapping; 3. sleeving knots are arranged; 4. a lower sleeve knot; 5. a first gap; 6. a second gap; 7. a keyhole hole.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1, the method for calculating the consumption of the bottom line of the keyhole of the buttonholing machine comprises the following steps:
s1, identifying a current keyhole shape combination, wherein the keyhole shape combination is composed of four structure modules including a left edge covering, a right edge covering, an upper sleeve knot and a lower sleeve knot, calling a linear consumption calculation formula corresponding to each of the four structure modules, and presetting and storing the corresponding calculation formula in an electric control system of the keyhole machine, wherein the specific formula is as follows:
Figure GDA0003243666420000071
Figure GDA0003243666420000072
wherein E isLeft side ofAnd ERight sideThe consumption of the bottom line of the left edge covering and the consumption of the right edge covering are respectivelyConsumption of bottom line of edge covering; i is the length of the cutting cloth, specifically the keyhole length, as shown in FIG. 2, N1Is the keyhole first clearance distance 5, i.e. the distance between the upper bar 3 and the keyhole opening 7, N2Is the keyhole second gap 6, i.e. the distance value between the lower bar 4 and the keyhole opening 7, M1For the length of the upper hitching knot 3 in the direction of the keyhole 7, M2The length of the lower slip 4 along the keyhole 7 direction, Q is the edge wrapping shape ratio, Q is a value set by a user, the setting range is 50-150, and default 100 represents 100% of the shape ratio, for example: if the edge covering width is set to be 2 and Q is set to be 90 by a user, the actual edge covering width is 1.8; t is the edge covering width, the left edge covering stitch width is the same as the right edge covering stitch width, and the edge covering width is the left edge covering stitch width or the right edge covering stitch width; delta is the thickness of the cloth, PWrapping edgeThe stitch length of the edge covering for the keyhole is the same as the stitch length of the left edge covering 1 and the stitch length of the right edge covering 2, namely the stitch length P of the edge covering for the keyholeWrapping edgeThe stitch pitch of the upper slipknots 3 and the lower slipknots 4 is the same, namely the stitch pitch P of the keyhole slipknotsNooseWherein, the shape of the upper hitching knot is the same with that of the lower hitching knot, and of course, the shapes can be different.
Consumption of bottom line of upper sleeve knot EUpper nooseAnd the amount of bottom line consumption E of lower jacketingLower nooseThe thread consumption calculation formula calls a corresponding calculation formula according to the specific nesting patterns of the upper nesting and the lower nesting identified in the current keyhole shape combination; the hitching patterns comprise flat-head hitches, radioactive hitches, round eye-shaped hitches, conical reinforced hitches, semi-round hitches, round hitches and linear reinforced hitches, the hitching patterns with different shapes and corresponding calculation formulas are made into calculation modules in advance and stored in the buttonholing machine electric control system, and the bottom line consumption calculation formulas corresponding to the hitching patterns are as follows:
Figure GDA0003243666420000073
Eradiation＝[7+4×(B-1)]×(T+δ)
ERound eye＝[7+4×(B-1)]×(T+δ)
Figure GDA0003243666420000081
Figure GDA0003243666420000082
Figure GDA0003243666420000083
Figure GDA0003243666420000084
Wherein E isFlat plateThe looping pattern is the loop bottom line consumption of the flat-head loop, ERadiationThe hitch pattern is the bottom thread consumption of the radioactive hitch, ERound eyeThe consumption of the knotting base line of the knotting pattern is a round eye-shaped knotting, EConical reinforcementThe amount of consumption of the hitching base line of the taper-shaped reinforcement type hitches is the hitching pattern, ESemi-circleThe looping pattern is the loop bottom line consumption of the semicircular loopRound (T-shaped)The looping pattern is the loop bottom line consumption of the round loop, EStraight line reinforcementThe looping pattern is the consumption of the looping bottom line of the straight-line reinforced loop, MiWherein i is selected according to the actual position of the noose, when i is 1, it is the upper noose, when i is 2, it is the lower noose, and B is the needle number of the radial (circular) shape noose, i.e. when the noose structure is a radioactive one, then B is the needle number of the radial shape noose, when the noose structure is a round eye shape one, a semi-round one or a round one, then B is the needle number of the circular shape one, PNooseThe stitch length is the keyhole and the hitch stitch length. The upper hitching knot and the lower hitching knot in a single keyhole can be the same or different in structure, if the upper hitching knot and the lower hitching knot are the same, the calculation formulas of the bottom line consumption of the upper hitching knot and the lower hitching knot are the same,
if the two calculation formulas are different, the calculation formulas respectively correspond to the hitches with different shapes. The upper hitches and the lower hitches in the embodiment are the same in shape and the stitches are the same.
At present, the 1790 buttonhole sewing machine electric control presetting can sew 26 common basic buttonhole patterns and 4 common reinforcing seam patterns and VDT sewing input after the patterns are designed from the outside, which covers all types of buttonhole sewing of the buttonhole sewing machine. Generally, the keyhole structures of different patterns have the same structure, namely: the main difference between the keyhole patterns is the selection and combination of the upper and lower two-set knot patterns (7 types of the knot patterns are shown in figure 3), and the reinforced sewing patterns in the preset keyhole patterns can be regarded as a part of a common keyhole structure. The scheme analyzes all preset keyhole pattern shapes and sewing thread stitch modes, divides the keyhole into four independent structure modules of a left edge covering, a right edge covering, an upper hitching knot and a lower hitching knot according to shape structures, divides the calculation of the bottom line quantity of the keyhole into independent calculation modules according to the combination of the pattern shapes, the shape of the keyhole pattern is actually the combination of the modules in the actual use process of the buttonholing machine, all shapes commonly used by the keyhole can be obtained by different combinations of the four independent structure modules, the consumption of the bottom line of the corresponding keyhole can be conveniently and simply calculated by calculating the consumption of the bottom line of each of the four independent structure modules, flexibly calling the calculation formula combination of each structural module according to the keyhole pattern arrangement, and being applicable to sewing of all types of keyholes, including all preset patterns of reinforced seams; the bobbin thread consumption calculation based on the needle number is carried out on each combined structure module, the calculation method is more sensitive to the change of the keyhole parameters, and the calculation result is more accurate.
The specific identification mode for identifying the current keyhole shape combination in the step is as follows: the method comprises the steps of collecting a current keyhole shape image in an image collection mode, splitting four module shape images of a left edge covering, a right edge covering, an upper hitching knot and a lower hitching knot, comparing the four module shape images with a left edge covering, a right edge covering, an upper hitching knot and a lower hitching knot which are stored in an electric control unit of a keyhole machine in advance and can be combined into keyhole with different shapes, and screening out the set shape modules with the same shapes as the left edge covering, the right edge covering, the upper hitching knot and the lower hitching knot corresponding to the current keyhole so as to identify the shape combination of the left edge covering, the right edge covering, the upper hitching knot and the lower hitching knot of the current keyhole. Of course, in addition to the above-mentioned manner, the operator may also input the corresponding parameter of the shape setting module according to the current keyhole shape to electrically control the keyhole machine so as to make the keyhole machine electrically control and identify the current keyhole shape combination.
S2, obtaining the keyhole parameters corresponding to the identified current keyhole shape combination, and respectively calculating E by combining the calculation formulas in the step S1Left side of、ERight side、EUpper nooseAnd ELower nooseAnd respectively calculate S by the following formula0And the thread amount L required for lower sewing:
S0＝Eleft side of+ERight side+EUpper noose+ELower noose；
L＝(I+N1+N2+M1+M2+5)*2*n；
Wherein n is the sewing times; the parameters of the keyhole are the length I of the cutting cloth and the first gap distance N of the keyhole1A second keyhole clearance distance N2Length M of upper hitching knot along the direction of keyhole1The length M of the lower slip knot along the direction of the keyhole2Edge-covering shape ratio value Q, edge-covering width T, cloth thickness delta and keyhole edge-covering needle pitch PWrapping edgeNumber of needles B of radial (circular) shape noose and stitch length P of keyhole nooseNooseAnd the number of times of seaming n, wherein the thread amount required for seaming is the bottom thread amount.
The step of obtaining the keyhole parameters corresponding to the identified current keyhole shape combination specifically comprises the following steps: automatically acquiring each keyhole parameter corresponding to the keyhole shape combination stored in the electric control of the keyhole machine in advance through the recognized keyhole shape combination; in addition to the above-mentioned method, it is also possible for the operator to input the corresponding keyhole parameters to the keyhole machine according to the current keyhole shape to electrically control the keyhole machine to obtain the corresponding keyhole parameters.
S3, calculating the current consumption S of the bottom thread of the keyhole according to the stitch form of the keyhole sewing:
S＝S0*x*y+L；
when the keyhole stitch is a plain stitch, x is 1, y is 1, and when the keyhole stitch is a plain stitch, x is 1, and y is 2; when the keyhole stitch is a triangle stitch, x is 1.8, y is 1, and when the keyhole stitch is a triangle stitch double stitch, x is 1.8, and y is 2.
The change of the keyhole stitches also significantly affects the consumption of the keyhole base thread, so the stitch change is considered when specifically calculating the base thread consumption, different keyhole stitches adopt different calculation formulas to calculate the base thread consumption, and the specific calculation mode and the considered factors are the same as those of the prior art with the publication number of CN111005165A, and are not described in detail herein.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims (6)

1. A buttonhole bottom line consumption calculation method of a buttonholing machine is characterized by comprising the following steps:
s1, identifying the current keyhole shape combination, wherein the keyhole shape combination is composed of four structure modules of a left edge covering, a right edge covering, an upper sleeve knot and a lower sleeve knot, and calling a linear consumption calculation formula corresponding to each of the four structure modules, wherein the specific formula is as follows:
Figure FDA0003294877630000011
Figure FDA0003294877630000012
wherein E isLeft side ofAnd ERight sideThe consumption of the bottom line of the left edge covering and the consumption of the bottom line of the right edge covering are respectively; i is the cut length, N1Is the keyhole firstGap distance, N2For a second clearance distance of the keyhole, M1For the length of the upper hitching knot in the direction of the keyhole, M2The length of the lower hitching knot along the keyhole direction, Q is the ratio value of the edge covering shape, T is the edge covering width, delta is the cloth thickness, PWrapping edgeThe stitch length of the keyhole wrapping is used;
consumption of bottom line of upper sleeve knot EUpper nooseAnd the amount of bottom line consumption E of lower jacketingLower nooseThe thread consumption calculation formula calls a corresponding calculation formula according to the specific nesting patterns of the upper nesting and the lower nesting identified in the current keyhole shape combination;
s2, obtaining the keyhole parameters corresponding to the identified current keyhole shape combination, and respectively calculating E by combining the calculation formulas in the step S1Left side of、ERight side、EUpper nooseAnd ELower nooseAnd respectively calculate S by the following formula0And the thread amount L required for lower sewing:
S0＝Eleft side of+ERight side+EUpper noose+ELower noose；
L＝(I+N1+N2+M1+M2+5)*2*n；
Wherein n is the sewing times;
s3, calculating the current consumption S of the bottom thread of the keyhole according to the stitch form of the keyhole sewing:
S＝S0*x*y+L；
when the keyhole stitch is a plain stitch, x is 1, y is 1, and when the keyhole stitch is a plain stitch, x is 1, and y is 2; when the keyhole stitch is a triangle stitch, x is 1.8, y is 1, and when the keyhole stitch is a triangle stitch double stitch, x is 1.8, and y is 2.
2. The consumption calculation method of the keyhole bottom line of the buttonholing machine according to claim 1, wherein the hitching patterns in step S1 include a flat hitching knot, a radioactive hitching knot, a round hitching knot, a tapered reinforced hitching knot, a semicircular hitching knot, a circular hitching knot and a straight-line reinforced hitching knot, and the bottom line consumption calculation formula corresponding to each hitching pattern is as follows:
Figure FDA0003294877630000021
Eradiation＝[7+4×(B-1)]×(T+δ)
ERound eye＝[7+4×(B-1)]×(T+δ)
Figure FDA0003294877630000022
Figure FDA0003294877630000023
Figure FDA0003294877630000024
Figure FDA0003294877630000025
Wherein E isFlat plateThe looping pattern is the loop bottom line consumption of the flat-head loop, ERadiationThe hitch pattern is the bottom thread consumption of the radioactive hitch, ERound eyeThe consumption of the knotting base line of the knotting pattern is a round eye-shaped knotting, EConical reinforcementThe amount of consumption of the hitching base line of the taper-shaped reinforcement type hitches is the hitching pattern, ESemi-circleThe looping pattern is the loop bottom line consumption of the semicircular loopRound (T-shaped)The looping pattern is the loop bottom line consumption of the round loop, EStraight line reinforcementThe looping pattern is the consumption of the looping bottom line of the straight-line reinforced loop, MiWherein i is selected according to the actual position of the noose, i is the upper noose when i is 1, i is the lower noose when i is 2, B is the needle number of the radial or circular noose, PNooseThe stitch length is the keyhole and the hitch stitch length.
3. According toThe method of claim 2, wherein the parameters of said keyhole in step S2 include said cloth cutting length I and said first keyhole clearance distance N1A second keyhole clearance distance N2Length M of upper hitching knot along the direction of keyhole1The length M of the lower slip knot along the direction of the keyhole2Edge-covering shape ratio value Q, edge-covering width T, cloth thickness delta and keyhole edge-covering needle pitch PWrapping edgeNumber of needles B of radial or circular hitches and stitch length P of keyhole hitchesNooseAnd the number of times of sewing down n.
4. The consumption calculation method for the consumption of the bottom line of the keyhole of the buttonholing machine according to claim 2 or 3, wherein the step S1 of identifying the current combination of the keyhole shapes is specifically as follows: acquiring a current keyhole shape image in an image acquisition mode, splitting four module shape images of a left edge covering, a right edge covering, an upper hitching knot and a lower hitching knot, comparing the four module shape images with each set shape module which is stored in an electric control unit of the keyhole machine in advance and can be combined into the keyhole with different shapes, and screening the set shape modules with the same shape as the left edge covering, the right edge covering, the upper hitching knot and the lower hitching knot corresponding to the current keyhole so as to identify the shape combination of the left edge covering, the right edge covering, the upper hitching knot and the lower hitching knot of the current keyhole; or, the operator inputs the corresponding set shape module parameter to the buttonholing machine according to the current buttonholing shape so as to enable the buttonholing machine to electrically identify the current buttonholing shape combination.
5. The method for calculating the consumption of the bottom line of the keyhole of the buttonholing machine according to claim 4, wherein the step S2 of obtaining the parameters of the keyhole corresponding to the identified combination of the current shape of the keyhole specifically comprises: automatically acquiring each keyhole parameter corresponding to the keyhole shape combination stored in the electric control of the keyhole machine in advance through the recognized keyhole shape combination; or, the operator inputs each keyhole parameter corresponding to the current keyhole shape to the keyhole machine to electrically control the keyhole machine to obtain the corresponding keyhole parameter.
6. The method of claim 5, wherein the upper bar and the lower bar in step S1 have the same shape and the same stitch.
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