CN113373600B - Double-needle sewing method with variable needle pitch - Google Patents
Double-needle sewing method with variable needle pitch Download PDFInfo
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- CN113373600B CN113373600B CN202010156245.9A CN202010156245A CN113373600B CN 113373600 B CN113373600 B CN 113373600B CN 202010156245 A CN202010156245 A CN 202010156245A CN 113373600 B CN113373600 B CN 113373600B
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B19/00—Programme-controlled sewing machines
- D05B19/02—Sewing machines having electronic memory or microprocessor control unit
- D05B19/04—Sewing machines having electronic memory or microprocessor control unit characterised by memory aspects
- D05B19/10—Arrangements for selecting combinations of stitch or pattern data from memory ; Handling data in order to control stitch format, e.g. size, direction, mirror image
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B19/00—Programme-controlled sewing machines
- D05B19/02—Sewing machines having electronic memory or microprocessor control unit
- D05B19/12—Sewing machines having electronic memory or microprocessor control unit characterised by control of operation of machine
- D05B19/14—Control of needle movement, e.g. varying amplitude or period of needle movement
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B19/00—Programme-controlled sewing machines
- D05B19/02—Sewing machines having electronic memory or microprocessor control unit
- D05B19/12—Sewing machines having electronic memory or microprocessor control unit characterised by control of operation of machine
- D05B19/16—Control of workpiece movement, e.g. modulation of travel of feed dog
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B55/00—Needle holders; Needle bars
- D05B55/10—Needle bars for multiple-needle sewing machines
- D05B55/12—Needle bars for multiple-needle sewing machines with provision for varying the distance between the needles
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B73/00—Casings
- D05B73/04—Lower casings
- D05B73/12—Slides; Needle plates
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention relates to a double-needle sewing method with variable needle pitch, which comprises the following steps: the method comprises the steps of data acquisition, sewing movement, sewing rotation and needle pitch modulation, wherein firstly, a plurality of pieces of sewing information with sequence are acquired according to two sewing stitches; then the X-Y axis feeding mechanism moves a sewn material in the horizontal direction according to the moving coordinate data of the sewing information; the needle bar is axially rotated in sequence by the rotatable needle bar mechanism according to the rotation angle data of the sewing information, and meanwhile, the needle plate rotating mechanism also horizontally rotates the needle plate and the rotating shuttle in sequence synchronously with the axial rotation according to the rotation angle data; and the stitch length adjusting mechanism is used for sequentially changing the modulation displacement of the stitch length width of the two needles according to the stitch distance data of the sewing information, so that the two needles can generate stitch length sizes with different widths during the continuous sewing of the two sewing stitches.
Description
Technical Field
The invention relates to a double-needle sewing method applied to a double-needle computer sewing machine, in particular to a sewing method capable of changing the stitch width among a plurality of needle holes generated by double-needle sewing stitches.
Background
With the development of automation and high speed of sewing machines, industrial sewing machines not only save manpower and increase the productivity of dikes, but also include machines developed with corresponding functions for various purposes, such as single-needle pattern sewing machines (using X-Y axes to drive automatic moving materials, and optionally changing sewing paths), single-needle rotating head pattern sewing machines (capable of further keeping the consistency of stitches in each sewing direction), or double-needle rotating head pattern sewing machines (capable of simultaneously sewing two equidistant curved stitches).
However, the stitch with parallel double needles can make the sewn article have better aesthetic effect, and further various clothes in life can be seen to be applied to double needle sewing, as shown in fig. 1, fig. 2A and fig. 2B, the double needle rotating head pattern sewing machine 9 is a computer controlled sewing machine having two machine needles 903 for sewing simultaneously, a head rotating mechanism 90 is provided above the double needle rotating head pattern sewing machine 9, and a base rotating mechanism 91 and an X-Y axis feeding mechanism 92 are provided below the head rotating mechanism 90, wherein the head rotating mechanism 90 can drive a needle bar 902 to rotate through a rotating joint 901, and the base rotating mechanism 91 drives a needle plate 911 and a rotating shuttle mechanism (not shown) to rotate synchronously with the needle bar 902, so that two needle holes 912 of the needle plate 911 can be respectively kept aligned with the two machine needles 903 one by one and one another at any time, the X-Y axis feeding mechanism 92 drives the sewing material to move horizontally through the clamp, so that two parallel stitches 93 can be sewn, the traditional manual operation double-needle sewing machine can be replaced, and the operation efficiency of sewing the articles is improved.
However, there are many kinds of sewn fabrics, some materials are thicker, some are thinner, some are softer, and some are harder, and therefore, the stitch gauge and stitch size required for different fabric conditions will be different. Generally, the needle space between the two needles must be increased when sewing thick and hard materials, and the needle space between the two needles must be decreased when sewing thin or soft materials, so that the needle holder 904 and the needle plate 911 required in the whole sewing process must be replaced according to the predetermined needle space in the case of double-needle sewing.
In addition, the stitch length 903a of the two needles 903 must be kept the same in the general two-needle sewing, so that the conventional two-needle sewing machine cannot sew patterns other than parallel stitches, and further, when the two-needle rotating head pattern sewing machine 9 needs to sew the curved path 94, the turning path of the two needles 903 is different from the preset stitch length 95, but the two needles 903 move up and down simultaneously, and the connection of the two needles 903 is perpendicular to the curved path 94, so that the actual stitch lengths 931 and 932 of the two parallel stitches 93 generated when the curved path 94 is sewn are obviously different, which often reduces the aesthetic property of the sewn object.
Disclosure of Invention
The invention mainly aims to enable a double-needle sewing machine to enable the needle pitch of two machine needles to be changed along with set data in the process of sewing two sewing stitches, so that two parallel stitches can maintain the same width, and the stitch length along the stitches can be kept equal, thereby increasing the application range of patterns which can be sewn by the double-needle sewing machine, improving the attractiveness of the sewn patterns and greatly improving the practicability of the double-needle sewing machine.
The secondary purpose of the invention is to make the double-needle sewing machine capable of sewing a plurality of parallel stitch patterns with different widths on the same material or changing the sewing path of the same double-needle to the stitch patterns with different widths, thereby expanding the applicable range of the patterns which can be sewn by the double-needle sewing machine.
To achieve the above object, the present invention provides a method for variable gauge double needle sewing, which is applied to a double needle sewing machine having an X-Y axis feeding mechanism, a rotatable needle bar mechanism, a needle plate rotating mechanism and a gauge adjusting mechanism, wherein the two needles can adjust the gauge of the needle within a predetermined size range during sewing of two stitches, and the predetermined size range is selected from a maximum value and a minimum value of the adjustable distance in the gauge adjusting mechanism, or a maximum reference value and a minimum reference value preset by a user.
The double needle sewing method comprises the following steps: a data acquisition step, a seam moving step, a seam rotating step and a pitch adjusting step; the data acquisition step is to acquire a plurality of groups of sewing information with sequencing according to two sewing stitches, wherein the sewing information comprises moving coordinate data, rotating angle data and one-needle distance data; the sewing moving step is that the X-Y axis feeding mechanism moves a sewn object in the horizontal direction in sequence according to the moving coordinate data; in the sewing rotation step, the rotatable needle bar mechanism sequentially axially rotates a needle bar according to the rotation angle data, and the needle plate rotating mechanism also sequentially synchronously horizontally rotates a needle plate and a rotating shuttle according to the rotation angle data; and the stitch length adjusting step is that the stitch length adjusting mechanism sequentially changes the width adjusting displacement of the stitch length for the two needles according to the stitch distance data, so that the two needles generate a plurality of stitch length sizes with different widths during the continuous sewing of the two sewing stitches.
In a preferred embodiment, the data obtaining step comprises: a trace setting program, a sewing point setting program and a data generating program; the stitch setting program mainly obtains two sewing stitches formed on the sewed object, and sets a stitch distance on the two sewing stitches; the sewing point setting program is to establish a sewing position on the two sewing stitches respectively, and obtain a plurality of first stitch sewing points and a plurality of second stitch sewing points on the two sewing stitches in sequence according to the stitch distance; the data generating program is used for connecting the first line track sewing point and the second line track sewing point corresponding to the sequence position with each other to obtain a plurality of machine needle distance data, and calculating the first line track sewing point, the second line track sewing point and the machine needle distance data to generate moving coordinate data and rotation angle data of the sewing information.
In addition, the data obtaining step may further include: a simulation proofreading program; the simulation proofreading program compares the machine needle distance data with the set size range respectively, when all the machine needle distance data fall into the set size range, the double-needle sewing machine generates a sewing execution instruction, and when any of the machine needle distance data is larger than or smaller than the set size range, the sewing starting positions on two sewing stitches are reselected.
After the simulation proofreading program reselects the seam starting position for multiple times, when the sewing execution instruction cannot be obtained, the double-needle sewing machine generates a reminding message for resetting the stitch distance.
The moving coordinate data can be selected from a central point coordinate of each machine needle distance data, and the central point coordinate is calculated to generate a processing path, so that the X-Y axis feeding mechanism drives the sewed object to move horizontally along the processing path.
In a possible embodiment, the pitch adjustment mechanism fixes one of the two needles at a reference position aligned with the axis of the needle bar, and the other of the two needles is relatively displaceable to change the pitch width.
In another possible embodiment, the needle pitch adjusting mechanism is provided with two needles respectively disposed at equal distance positions on both sides of the axis of the needle bar, and can drive the two needles to perform synchronous displacement to change the needle pitch width.
The needle plate rotating mechanism comprises a moving device, and the moving device can drive the two needle holes of the needle plate to synchronize the needle according to the needle distance data to generate relative displacement, so that the two needle holes are aligned with the two needles during sewing.
The invention has the advantages that when the double needles actually pass through two sewing paths for sewing, the needle pitch and the rotation angle between the two needles can be changed in real time, and all stitches produced on the sewn object are in accordance with the set size, so that the attractiveness and the consistency of the stitches formed on the sewn object can be increased.
Drawings
FIG. 1 is a perspective view of a known double needle rotary head pattern sewing machine;
FIGS. 2A to 2B are schematic views illustrating a conventional two-needle sewing machine forming a sewing path;
FIG. 3 is a schematic structural view of a first embodiment of a two-needle sewing machine according to the present invention;
FIG. 4 is a step diagram of a first embodiment of a double needle sewing method of the present invention;
FIG. 5 is a flowchart illustrating a data acquisition procedure according to the present invention;
FIG. 6 is a schematic view of a single needle moving and rotating;
FIG. 7 is a schematic view of a first embodiment of a sewing seam formed on a sewn object;
FIG. 8 is a schematic view of two needles moving and rotating simultaneously;
FIG. 9 is a schematic view of a second embodiment of forming a seam on an object to be sewn;
fig. 10 is a schematic structural view of a two-needle sewing machine according to a second embodiment of the present invention.
Description of reference numerals: 1-two-needle sewing machine; 10-machine needle; 11-a rotatable needle bar mechanism; 111-needle bar; 12-a gauge adjustment mechanism; 13-a needle plate rotating mechanism; 131-a needle plate; 132-a rotating shuttle; 133-pinhole; 134-a mobile device; 2-sewing a stitch; 21-stitch distance; 22-a seam start position; 23. 23a, 23 b-first stitch stitching point; 24. 24a, 24 b-second stitch stitching point; 25-hand distance data; 26-a machining path; 3-data acquisition step; 31-stitch setting program; 32-sewing point setting program; 33-a data generation program; 34-simulation proofreading program; 4-sewing moving step; 5-sewing and rotating; 6-a step of adjusting the needle pitch; 7-sewn object; 9-double needle rotating head pattern sewing machine; 90-a head rotation mechanism; 901-a swivel; 902-needle bar; 903-machine needle; 903 a-gauge; 904-needle clip; 91-base rotation mechanism; 911-needle board; 912-pinholes; a 92-X-Y axis feeding mechanism; 93-stitches; 931. 932-actual stitch length; 94-curved path; 95-preset stitch length.
Detailed Description
The invention will be further described with reference to specific embodiments and drawings, the advantages and features of which will become apparent as the description proceeds.
Referring to fig. 3, the method for double-needle sewing with variable needle pitch of the present invention is mainly applied to a double-needle sewing machine 1 having double needles 10, wherein the double-needle sewing machine 1 is provided with a rotatable needle bar mechanism 11 and a needle pitch adjusting mechanism 12 at a head portion, and is further provided with a needle plate rotating mechanism 13 and an X-Y axis feeding mechanism (not shown) at a base portion, so that the two needles 10 of the double-needle sewing machine 1 can perform needle pitch modulation within a set size range during sewing of two sewing stitches 2 (see fig. 7).
In a possible embodiment, the set size range is selected between a modulation maximum and a modulation minimum of the distance that the two needles 10 are designed to be adjustable in the pitch adjustment mechanism 12, or the user directly sets a maximum reference value and a minimum reference value, the maximum reference value being smaller than or equal to the modulation maximum and the minimum reference value being greater than or equal to the modulation minimum.
Referring to fig. 4, the double needle sewing method of the present invention comprises: a data obtaining step 3, a seam moving step 4, a seam rotating step 5 and a pitch modulating step 6.
The data obtaining step 3 is to calculate the moving tracks of two sewing stitches 2 to be sewn on a sewn object 7, and obtain a plurality of sets of sewing information such as first sewing information, second sewing information, third sewing information … according to the sequence of the moving tracks, wherein each sewing information includes a moving coordinate data, a rotation angle data and a needle distance data 25.
The sewing movement step 4 is to sequentially move the sewn object 7 in the horizontal direction by the X-Y axis feeding mechanism according to the movement coordinate data, and the horizontal direction movement may be a single linear direction along the X axis, a single linear direction along the Y axis, or an oblique direction combining the X axis and the Y axis.
In the sewing rotation step 5, the rotatable needle bar mechanism 11 sequentially axially rotates a needle bar 111 according to the rotation angle data, and the needle plate rotating mechanism 13 sequentially rotates a needle plate 131 and a group of rotating shuttles 132 a plurality of times in synchronization with the axial rotation according to the rotation angle data.
The needle pitch adjusting step 6 is to sequentially change the adjustment displacement of the needle pitch width of the two needles 10 by the needle pitch adjusting mechanism 12 according to the needle distance data 25, so that the two needles 10 generate a plurality of needle pitch sizes with different widths during the continuous sewing of the two sewing stitches 2.
Referring to fig. 5 to 7, the data obtaining step 3 of the present invention includes: a trace setting program 31, a sewing point setting program 32, a data generation program 33 and a simulation verification program 34.
First, the stitch setting program 31 is a program for causing the two-needle sewing machine 1 to obtain two parallel sewing stitches 2 to be sewn on the object 7 to be sewn, and for causing a user to preset a stitch distance 21 to the two-needle sewing machine 1 so that the two-needle sewing machine 1 obtains two sewing stitches 2 and stitch setting data of the stitch distance 21. However, the two parallel sewing stitches 2 are only used for illustration to keep the stitch distance 21, that is, the two sewing stitches 2 can have a separation distance with different widths in some areas, so that the two sewing stitches 2 are in a non-parallel state (not shown), thereby expanding the pattern state of sewing by the two-needle sewing.
Subsequently, the stitch setting program 32 is a computer device on the two-needle sewing machine 1 for establishing a seam location 22 on each of the two sewing stitches 2, and generating a plurality of first stitch stitches 23 having the same pitch with each other in one of the sewing stitches 2 according to the stitch distance 21, and generating a plurality of second stitch stitches 24 having the same pitch with each other in the other sewing stitch 2 according to the same stitch distance 21.
The data generating program 33 is used to connect the first stitch seam 23 and the second stitch seam 24 with the same sequence position to each other by the computer device to obtain a plurality of needle distance data 25, as shown in the figure, the first stitch seam 23a and the second stitch seam 24a which are also connected to the first position generate a first needle distance data, the first stitch seam 23b and the second stitch seam 24b which are connected to the second position generate a second needle distance data, and so on to generate third and fourth needle distance data 25, …, etc. Subsequently, the movement coordinate data and the rotation angle data are generated based on the first stitch sewing point 23, the second stitch sewing point 24, and the needle distance data 25.
The simulation proof program 34 is to compare the needle distance data 25 with the set size range, and when all the needle distance data 25 fall into the set size range, the computer device will generate a sewing execution instruction transmitted to the two-needle sewing machine 1; on the contrary, when any one of the needle distance data 25 is larger or smaller than the set size range, the computer device does not transmit the sewing execution instruction, and reselects the sewing starting position 22 on the two sewing stitches 2, and replaces the original sewing position 22 with the new sewing position to perform the simulation calibration again. If the simulation proof program 34 cannot obtain the sewing execution command after the reselection of the starting position 22 for a plurality of times, the two-needle sewing machine 1 generates a warning message for resetting the stitch distance 21.
Referring to fig. 6, in a possible embodiment, the needle pitch adjusting mechanism 12 fixes one of the two needles 10 at a reference position aligned with the axis of the needle bar 111, and the other of the two needles 10 is relatively displaceable to change the needle pitch width, i.e. the first needle pitch data 25a and the second needle pitch data 25b …, and the corresponding needle holes 133 on the needle plate 131 are also fixed at a reference position aligned with the axis of the needle bar 111, and the other of the two needle holes 133 is relatively displaceable to correspond to the other needle 10.
Referring to fig. 8 to 10, in another possible embodiment, the needle pitch adjusting mechanism 12 is configured to set two needles 10 at equidistant positions on both sides of the axis of the needle bar 111, and can drive the two needles 10 to perform synchronous displacement to change the needle pitch width. In this embodiment, the moving coordinate data may be selected from a center coordinate of each needle distance data 25, and the center coordinate is calculated to generate a processing path 26, so that the X-Y feeding mechanism drives the sewn object 7 to move horizontally along the processing path 26, and simultaneously, the needle bar 111 sequentially axially rotates according to the rotation angle data, and the needle plate 131 and the rotating shuttle 132 sequentially synchronously axially rotate according to the rotation angle data, so that the two needles 10 can respectively generate the first stitch sewing point 23 and the second stitch sewing point 24 on the two sewing stitches 2.
As shown in fig. 10, the needle plate rotating mechanism 13 includes a set of moving devices 134, the moving devices 134 can move the two needle holes 133 and the two rotating shuttles 132 of the needle plate 131 synchronously to generate relative displacement of the two needles 10 according to the needle distance data 25, so that the two needle holes 133 are kept aligned with the two needles 10 during sewing.
Compared with fig. 3, the result of the implementation shown in fig. 10 is that the straight-line sewing stitch with double needles and double bottom lines is also equivalent to the effect of sewing two stitches with a single-needle type sewing machine, so that the rotating shuttles 132 of two vertical shafts must be synchronously moved transversely with the two needle holes 133, respectively, while the rotating shuttle 132 of a horizontal shaft shown in fig. 3 is adopted, the bottom lines can be simultaneously interlaced with the two needle lines within a certain needle pitch range, so that the needle hole 133 is made into a long hole, and the needle plate 131 and the rotating shuttle 132 are only driven by the needle plate rotating mechanism 13 to synchronously and horizontally rotate with the needle bar 111, and the effect of the implementation is equivalent to the sewing stitch with double needles and single bottom lines sewing machine, which makes the bottom lines present zigzag.
The foregoing description and examples are exemplary only, and are not intended to limit the scope of the invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and substitutions are intended to be within the scope of the invention.
Claims (9)
1. A double-needle sewing method with variable needle pitch is applied to a double-needle sewing machine with an X-Y axis feeding mechanism, a rotatable needle bar mechanism, a needle plate rotating mechanism and a needle pitch adjusting mechanism, and the two needles can carry out the needle pitch adjustment within a set size range during the sewing of two sewing stitches, and is characterized in that the method comprises the following steps:
a data acquisition step, acquiring a plurality of groups of sewing information with sequencing according to two sewing stitches, wherein the sewing information comprises moving coordinate data, rotation angle data and one-needle distance data;
a sewing moving step, wherein the X-Y axis feeding mechanism moves a sewn material in the horizontal direction in sequence according to the moving coordinate data;
a sewing rotation step, wherein the rotatable needle bar mechanism sequentially axially rotates a needle bar according to the rotation angle data, and the needle plate rotating mechanism also sequentially synchronizes the horizontal rotation of the axial rotation to a needle plate and a rotating shuttle according to the rotation angle data; and
and a stitch length adjusting step, wherein the stitch length adjusting mechanism sequentially changes the adjusting displacement of the stitch length width of the two needles according to the stitch distance data, so that the two needles generate a plurality of stitch length sizes with different widths during the continuous sewing of the two sewing stitches.
2. The method of claim 1, wherein the data obtaining step comprises:
a stitch setting program for obtaining two sewing stitches formed on the sewn object and setting a stitch distance between the two sewing stitches;
a sewing point setting program, which respectively establishes a sewing position on the two sewing stitches and respectively obtains a plurality of first stitch sewing points and a plurality of second stitch sewing points on the two sewing stitches in sequence according to the stitch distance; and
and a data generating program for connecting the first stitch sewing points and the second stitch sewing points corresponding to the sequence positions with each other to obtain a plurality of machine needle distance data, and calculating the first stitch sewing points, the second stitch sewing points and the machine needle distance data to generate the movement coordinate data and the rotation angle data of the sewing information.
3. The method of claim 2, wherein the data obtaining step further comprises:
and a simulation proofreading program which compares the plurality of machine needle distance data with the set size range respectively, generates a sewing execution instruction when all the machine needle distance data fall into the set size range, and reselects the sewing starting position on two sewing stitches when any of the plurality of machine needle distance data is larger or smaller than the set size range.
4. The variable gauge double needle sewing method according to claim 3, wherein: after the simulation proofreading program reselects the seam starting position for a plurality of times, when the sewing execution instruction cannot be obtained, the double-needle sewing machine generates a reminding message for resetting the stitch distance.
5. The variable gauge double needle sewing method according to claim 3, wherein: the moving coordinate data is a central point coordinate selected from each needle distance data, and the central point coordinate is calculated to generate a processing path, so that the X-Y axis feeding mechanism drives the sewn object to horizontally displace along the processing path.
6. The variable gauge double needle sewing method according to claim 1, wherein: the set size range is selected from the maximum and minimum values of the adjustable distance in the needle pitch adjusting mechanism, or the maximum and minimum reference values preset by the user.
7. The variable gauge double needle sewing method according to claim 1, wherein: the needle pitch adjusting mechanism fixes one of the two needles at a reference position aligned with the axis of the needle bar, and the other of the two needles is relatively displaceable to change the needle pitch width.
8. The variable gauge double needle sewing method according to claim 1, wherein: the needle pitch adjusting mechanism is characterized in that two needles are respectively arranged at equidistant positions on two sides of the axis of the needle bar and can be driven to synchronously shift to change the needle pitch width.
9. The variable gauge double needle sewing method according to claim 1, wherein: the needle plate rotating mechanism further comprises a moving device, and the moving device can drive the two needle holes of the needle plate to synchronize the needle according to the needle distance data to generate relative displacement, so that the two needle holes are kept aligned with the two needles during sewing.
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| CN202010156245.9A CN113373600B (en) | 2020-03-09 | 2020-03-09 | Double-needle sewing method with variable needle pitch |
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| CN202010156245.9A CN113373600B (en) | 2020-03-09 | 2020-03-09 | Double-needle sewing method with variable needle pitch |
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| CN113373600A (en) | 2021-09-10 |
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