Encrypted sewing control method and sewing equipment

Abstract

The invention relates to an encryption sewing control method and sewing device.The encryption sewing control method comprises the steps that cloth is dragged through a cloth dragging wheel to advance at the first speed, and skip sewing or normal sewing is conducted on the cloth at the first speed; the position of the cloth is detected in real time, when the cloth advances to a preset position, the cloth is dragged through a cloth dragging wheel to advance at a second speed, and dense sewing is conducted on the cloth at the second speed; wherein the second speed is less than the first speed. According to the encrypted sewing control method, through cooperation of one or more modes, the stitch length can be reduced on the premise that the movement frequency of the machine needle is not changed, the phenomenon that the stitch is loose after the thread end formed by skipping stitch is pulled is avoided, and the garment quality is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of clothing processing and equipment technology, and in particular to an encrypted sewing control method and sewing equipment. Background Art

[0002] In the field of garment manufacturing, different fabrics often need to be sewn together. Based on design and process requirements, there may be a skipped seam area, that is, the bottom thread does not intersect with the top thread in this area.

[0003] Taking the waist-up process of jeans as an example, the fabrics that need to be sewn together are the waistband and the body fabric. Generally, chain stitches are used. After skip stitching in some areas, thread ends (non-intersecting upper and lower threads) will be left. During the transportation of clothing, the thread ends floating on the surface of the fabric are easily pulled, resulting in the phenomenon of loose stitches, which seriously affects the appearance and sewing quality of the upper waist area. Generally, it can only be repaired by manual stitching, which increases costs and reduces the quality of clothing. At present, there is no effective way in the industry to avoid this situation. Summary of the invention

[0004] In view of the problems in the prior art, the present application provides a sewing method for preventing thread ends from being pulled apart at the skipped seam area.

[0005] The present application provides an encrypted sewing control method, comprising:

[0006] The cloth is dragged by the cloth-dragging wheel to travel at a first speed, and the cloth is subjected to jump stitching or normal sewing at the first speed;

[0007] The cloth position is detected in real time, and when the cloth moves to a predetermined position, the cloth is dragged by a cloth-drag wheel to move at a second speed, and the cloth is sewn densely at the second speed;

[0008] The second speed is less than the first speed.

[0009] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0010] In one embodiment, the skip stitch, the normal sewing and the encrypted sewing respectively correspond to form a skip stitch area, a normal sewing area and an encrypted sewing area. Along the sewing path, the encrypted sewing area is adjacent to the upstream and / or downstream of the skip stitch area.

[0011] In one embodiment, the fabric is sewn by driving the upper thread through a machine needle and intersecting with the lower thread, and when performing the encrypted sewing, the tension of the upper thread is increased relative to the normal sewing.

[0012] In one embodiment, increasing the tension of the upper thread is selected from at least one of the following methods:

[0013] extending the extension path of the surface line;

[0014] A frictional resistance is applied to the upper thread.

[0015] In one embodiment, the encrypted sewing control method further drives the fabric to move forward by means of a presser foot and a feed dog that cooperate with each other, and when the tension of the upper thread is increased, the pressure of the presser foot is also reduced in a linked manner.

[0016] The present application also provides a sewing device, comprising a cloth feeding device for driving the cloth to move forward, and a sewing device for sewing the cloth, wherein the cloth feeding device comprises a cloth dragging wheel for dragging the cloth to move forward, and the sewing device comprises a thread clamp assembly for the upper thread to pass through, and a needle carrying the upper thread to reciprocate on both sides of the cloth, and the movement speed of the cloth dragging wheel is adjustable to implement the encrypted sewing control method described in the present application.

[0017] In one embodiment, the sewing device further comprises:

[0018] Sensor, used to detect the fabric and provide corresponding position signal;

[0019] The controller receives the position signal and controls the mop wheel to adjust the movement speed accordingly.

[0020] In one embodiment, the wire clamp assembly comprises:

[0021] The front wire-passing plate is provided with a first wire-passing hole;

[0022] The rear wire-passing plate is provided with a second wire-passing hole;

[0023] The thread beating rod is provided with a third thread passing hole, the upper thread passes through the first thread passing hole, the third thread passing hole and the second thread passing hole in sequence, and the thread beating rod is movably installed and controlled by the controller to change the tension of the upper thread.

[0024] In one embodiment, the cloth feeding device further includes a presser foot and a feed dog that cooperate with each other to clamp and move the cloth, the pressure of the presser foot is adjustable and controlled by the controller, and the pressure of the presser foot is adjusted in conjunction with the tension of the surface thread.

[0025] In one embodiment, the sewing device further comprises:

[0026] A feedback device detects an operating signal and feeds it back to the controller so that the controller can drive the mop wheel, the presser foot and the thread clamp assembly accordingly. The operating signal is related to the movement speed of the mop wheel, the pressure of the presser foot, and the tension of the upper thread.

[0027] The encrypted sewing control method of the present application can reduce the needle distance while keeping the needle movement frequency unchanged through one or more coordinated methods, thereby avoiding the loosening of the stitches caused by skipped seams due to pulling, thereby ensuring the quality of garment processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is a schematic diagram of the three-dimensional structure of a sewing device in one embodiment of the present application;

[0030] Figure 2 for Figure 1 A schematic diagram of the sewing equipment from another angle;

[0031] Figure 3 for Figure 1 A schematic diagram of the sewing equipment from another angle;

[0032] Figure 4 for Figure 1 Schematic diagram of the structure of the thread clamp assembly of the sewing equipment;

[0033] Figure 5 for Figure 4 Enlarged view of part A in the middle;

[0034] Figure 6 for Figure 5 Schematic diagram of the batting rod after movement;

[0035] Figure 7 This is a schematic diagram of the principle of an encrypted sewing control method in one embodiment of the present application;

[0036] Figure 8 This is a flow chart of an encrypted sewing control method in one embodiment of the present application;

[0037] Fig. 9 Schematic diagram of stitch distribution after implementing the encrypted sewing control method.

[0038] The reference numerals of the components are as follows:

[0039] 100, sewing machine; 110, frame; 120, motor; 130, mopping wheel; 140, first sensor; 150, second sensor; 160, thread clamp assembly; 161, front thread plate; 162, first thread hole; 163, rear thread plate; 164, second thread hole; 165, thread rod; 166, third thread hole; 167, cylinder; 168, connecting seat; 170, needle; 180, presser foot; 190, upper thread; 200, body fabric; 210, waistband. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0041] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level (or in a state of use, or from a certain perspective of the drawing) than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level (or in a state of use, or from a certain perspective of the drawing) than the second feature.

[0044] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0045] In view of the problem that the thread ends after skip stitching in the prior art are easily pulled and the stitches become loose, see Figure 1 to Figure 3 An embodiment of the present application provides a sewing device. The following embodiments take the sewing machine 100 as an example. The needle length can be changed at the end of the jump stitch area as needed. Compared with normal sewing, the stitches formed after the needle length is reduced are denser, that is, encrypted sewing is achieved. The encrypted sewing can further improve the connection strength between the suture and the fabric relative to normal sewing, and the stitches are not easily pulled apart and damaged when being pulled by the thread head.

[0046] The following mainly describes the improved parts of the sewing machine 100, and the parts not mentioned can be implemented in combination with the prior art. The sewing machine 100 of this embodiment includes a cloth feeding device for driving cloth to travel, and a sewing device for sewing cloth.

[0047] The sewing machine 100 specifically includes a frame 110, and the cloth feeding device includes a mop wheel 130 for dragging the cloth forward, wherein the mop wheels 130 are arranged in pairs, and the same pair of mop wheels 130 are respectively located on the upper and lower sides of the cloth, and the mop wheels 130 clamp and drag the cloth forward when rotating. At least one of the same pair of mop wheels 130 serves as a driving wheel and is connected to a power mechanism. For example, the power mechanism can adopt a motor 120 and is connected to the mop wheel 130 through a transmission mechanism. The mop wheel 130 itself can be installed on a height-adjustable lifting frame to facilitate the pre-setting of the cloth and adapt to changes in the thickness of the cloth.

[0048] The sewing device includes relevant components for transmitting the upper thread 190 and the lower thread, wherein the relevant components for transmitting the lower thread can be implemented in combination with the existing technology. The relevant components for transmitting the upper thread 190 include a thread clamp assembly 160 for allowing the upper thread 190 to pass through and providing tension, and a needle 170 that carries the upper thread 190 back and forth on both sides of the fabric for sewing.

[0049] In this embodiment, when dense sewing is required, the rotation speed of the mopping wheel 130 is changed by the motor 120, that is, the movement speed of the mopping wheel 130 is adjustable to change the traveling speed of the fabric. When the reciprocating frequency of the needle 170 remains unchanged, the traveling speed of the fabric is reduced, and the stitch length can be reduced to obtain denser stitches.

[0050] To facilitate automatic control, in one embodiment, the sewing machine 100 further includes a first sensor 140, which is used to detect the edge position of the fabric in real time and provide a corresponding position signal. According to the distance between the first sensor 140 and the needle 170 and in combination with the travel speed of the fabric, the timing when the sewing part of the fabric reaches the needle 170 can be conveniently calculated, and the desired sewing method can be switched accordingly. For example, normal sewing, skip stitching or encrypted sewing can be performed. The "normal" sewing and "encrypted" sewing in this application are relative concepts, that is, encrypted sewing has a smaller stitch length, but the specific value of the stitch length is not strictly limited. For example, the encrypted sewing is 50% to 90% of the normal sewing stitch length, etc. For example, the encrypted sewing stitch length is greater than or equal to 0.5 mm and less than the normal sewing stitch length.

[0051] In this embodiment, the sewing machine 100 also includes a controller, for example, the controller can be a programmable logic controller (PLC). The controller is used to control the operation of the sewing machine 100 as a whole, and can receive the position signal from the first sensor 140 and drive the corresponding controlled components and cooperate with the change of sewing method. The speed of the mop wheel 130 can be adjusted during encrypted sewing. In specific methods, for example, the rotation speed of the motor 120 can be changed or the transmission ratio between the motor 120 and the mop wheel 130 can be changed, etc., so as to reduce the travel speed of the cloth.

[0052] In some embodiments, the sewing machine 100 is also equipped with an automatic cutting function, for example, a cutter controlled by a controller and a second sensor 150 for detecting the position of the cloth. The second sensor 150 can detect the position of the edge of the cloth (and the shape of the edge of the cloth as needed) and drive the cutter through the controller to cut the leading edge and / or trailing edge of the cloth, or the thread braid at the edge of the cloth.

[0053] Along the traveling direction of the fabric, the first sensor 140 is located upstream of the needle 170, and the second sensor 150 is located downstream of the needle 170. As for each sensor itself, the existing technology can be adopted.

[0054] In one embodiment, the sewing machine 100 may not be provided with a presser foot and a feed dog, for example, only the mopping wheel 130 is used to drive the cloth to move. In other embodiments, the presser foot 180 and the feed dog may be used in conjunction. The presser foot 180 and the feed dog cooperate with each other to intermittently clamp and move the cloth. The presser foot 180 is located above the cloth and is installed on the frame 110 with an adjustable height. The height adjustment of the presser foot 180 can be driven by a controller, for example, by a controlled cylinder or motor to drive the presser foot 180. The height change of the presser foot 180 also means that the pressure of the presser foot 180 relative to the cloth and the feed dog changes, that is, the clamping force of the presser foot 180 and the feed dog on the cloth changes. The configuration of the presser foot 180 and the feed dog can make the sewing equipment more applicable to a wider range of scenarios.

[0055] In one embodiment, the tension provided by the thread clamp assembly 160 to the surface thread 190 is adjustable. For example, a movable component is provided in the thread clamp assembly 160 to change the extension path of the surface thread 190 , or other components are provided to apply friction resistance to the surface thread 190 .

[0056] When implementing encrypted sewing, while changing the rotation speed of the mopping wheel 130, it is also possible to increase the tension of the upper thread 190 and reduce the pressure of the presser foot 180. In this way, the fabric between the presser foot 180 and the feed dog can be appropriately retracted (moving in the opposite direction of the fabric travel direction), further ensuring that the stitch length is reduced. The sewing mode can also be switched without stopping the machine, thereby achieving continuous sewing operations and further improving production efficiency.

[0057] See also Figures 4 to 6 In one embodiment, the tension of the upper thread 190 is changed by an improved thread clamp assembly 160. For example, in the thread clamp assembly 160, at least one component is a movable component and can drive the upper thread 190 to change the transmission path. For example, the thread clamp assembly 160 includes:

[0058] The front wire passing plate 161 is provided with a first wire passing hole 162;

[0059] The rear wire passing plate 163 is provided with a second wire passing hole 164;

[0060] The front wire-passing plate 161 and the rear wire-passing plate 163 both have bending parts that are opposite to each other, and the first wire-passing hole 162 and the second wire-passing hole 164 are respectively opened at the corresponding bending parts.

[0061] The wire clamp assembly 160 also includes a wire beating rod 165, which is located between the bending parts of the front wire passing plate 161 and the rear wire passing plate 163. The wire beating rod 165 is provided with a third wire passing hole 166, and the surface wire 190 passes through the first wire passing hole 162, the third wire passing hole 166 and the second wire passing hole 164 in sequence.

[0062] In this embodiment, the wire rod 165 is movably installed and controlled by the controller. In order to drive the wire rod 165, the clamp assembly 160 also includes a cylinder 167. The cylinder 167 can be installed on one of the wire passing plates. The piston rod of the cylinder 167 is fixed to the wire rod 165 through the connecting seat 168. When the tension of the surface thread 190 needs to be increased, the cylinder 167 drives the wire rod 165 to move, and then drives the third wire passing hole 166 to change its position, so that the extension path of the surface thread 190 is lengthened and more tortuous. Figure 5 and Figure 6 It can be seen that after the thread rod 165 is lifted, the extension path of the surface thread 190 between the first thread hole 162 and the second thread hole 164 changes from a relatively straight line to an obvious fold line, thereby appropriately increasing the tension of the surface thread 190, and the fabric can be driven back relative to the feed dog to achieve denser sewing.

[0063] To facilitate closed-loop control, in one embodiment, the sewing machine 100 also includes a feedback device, which can be a plurality of sensing elements or measuring elements, etc., which can directly collect the movement speed of the mop wheel 130, the pressure of the presser foot 180, and the tension of the upper thread 190, or collect other parameters associated with these parameters for conversion by the controller. Either method can be understood as detecting an operating signal. After the operating signal is fed back to the controller, the controller can adjust the controlled components in real time so that the operating signal tends to be within the expected range, thereby ensuring the effect of encrypted sewing and the correct resetting of related components after the encrypted sewing is completed.

[0064] Based on the sewing equipment of the above embodiments, an embodiment of the present application also provides an encrypted sewing control method, the main principle of which can be seen in Figure 7 The controller obtains or calculates the real-time position of the fabric through the position signal of the sensor. When it is necessary to implement dense sewing, the speed of the mop wheel is changed to reduce the stitch length. According to the configuration of the sewing equipment, it can further assist by reducing the pressure of the presser foot and increasing the tension of the surface thread.

[0065] For example, when the cloth is dragged by the cloth-dragging wheel 130, the encrypted sewing control method of this embodiment includes:

[0066] The cloth is dragged by the cloth-dragging wheel 130 to travel at a first speed, and jump stitching or normal sewing is performed on the cloth at the first speed;

[0067] The cloth position is detected in real time, and when the cloth moves to a predetermined position, the cloth is dragged by the cloth dragging wheel 130 to move at a second speed, and the cloth is sewn densely at the second speed;

[0068] The second speed is lower than the first speed. After skip stitching, normal sewing and encrypted sewing, a skip stitch area, a normal sewing area and an encrypted sewing area are formed respectively. In order to avoid the thread ends formed by the skip stitch being pulled and damaging the stitches, along the sewing path, the upstream and / or downstream of the skip stitch area are adjacent to the encrypted sewing area to improve the connection strength between the stitches at the ends of the skip stitch and the fabric.

[0069] When the sewing equipment is equipped with a presser foot and a feed dog that cooperate with each other, the tension of the upper thread is increased and the pressure of the presser foot is reduced during dense sewing. The tension of the upper thread can be increased by extending the extension path of the upper thread or applying friction resistance to the upper thread.

[0070] See also Figure 8 In one embodiment of the present application, the encrypted sewing control method of the present application is further explained by taking the upper waistband process of jeans as an example, wherein the sensors and other components mentioned in the present application can be combined with Figure 1 The fabrics involved include a body fabric 200 and a strip waistband 210. Fig. 9 Through sewing at different times, the stitches formed include corresponding skip stitch areas, normal sewing areas and encrypted sewing areas, which are further described in detail below.

[0071] When sewing, the sewing machine pedal 100 is stepped on to place the waistband 210 under the presser foot 180, and then the A needle is sewn forward normally (i.e. the waist piece is sewn normally with the A needle), forming Fig. 9 Normal sewing area L1 in.

[0072] Then, the open stitching (i.e., skip stitching) begins. At this time, the body fabric 200 can be overlapped with the waistband 210 according to the actual situation and move together. When the sensor senses the fabric, that is, the first sensor 140 detects the front edge of the body fabric 200, the distance between the preset seam start position of the body fabric 200 and the needle 170 is converted into the number of needles and the open stitching B needle can be continued. At this point, the sensor senses the formation of two open seams in front and behind the fabric. Fig. 9 The seam skipping area L2 in the.

[0073] At this time, the sewing position of the body fabric 200 corresponds to the machine needle 170, and normal sewing can be further performed. During this process, if the second sensor 150 senses the fabric, the controller can calculate the cutting time and drive the cutter to cut off the redundant waistband 210 in the front section accordingly. During the process of sewing, the first sensor 140 will always detect the fabric until the rear edge of the fabric leaves the first sensor 140, that is, the sensor does not sense the fabric. At this time, according to the relative position of the fabric and the machine needle 170, the normal sewing position of the C needle is further sewn. At this point, the position of normal sewing from the empty seam B needle is formed. Fig. 9 Normal sewing area L3 in the.

[0074] Normal sewing of C stitch means that the fabric moves to the position where dense sewing is required. The controller can control the speed of the motor 120 to slow down, that is, the speed of the mopping wheel 130 is reduced to correspondingly reduce the mopping stitch length, and at the same time control the pressure of the presser foot 180 to reduce, and change the extension path of the upper thread 190 through the thread clamp assembly 160 to increase the tension of the upper thread 190. Therefore, when the curved needle moves forward, the tension of the upper thread 190 overcomes the pressure of the presser foot 180 to pull the fabric back, reducing the actual stitch length, and realizing dense sewing, that is, sewing D stitch, forming Fig. 9 Similarly, when the second sensor 150 senses that the cloth has left, the controller can control the cutter to cut the excess cloth at the rear end.

[0075] After sewing the D needle by means of dense sewing, the E needle can be further formed by empty sewing according to the process flow. Fig. 9 The seam skipping area L5 in the.

[0076] Normal sewing can then be carried out, for example Fig. 9The normal sewing area L6 in the sewing process is completed.

[0077] This embodiment reduces the pressure of the presser foot, reduces the mopping stitch length of the mopping wheel, and appropriately increases the tension of the surface thread to perform dense sewing. In other embodiments, the feed dog structure of the sewing machine head can be removed, and only the mopping wheel is used for mopping. In this case, it is only necessary to reduce the mopping stitch length of the mopping wheel to achieve dense sewing, which can meet the skipping requirements of the waistband sewing process of jeans and realize the dense sewing function, ensuring that the stitches are not easy to loosen.

[0078] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. When the technical features in different embodiments are embodied in the same figure, it can be regarded that the figure also discloses the combination examples of the various embodiments involved.

[0079] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. An encrypted sewing control method, characterized in that: include: The cloth is dragged by the cloth-dragging wheel to travel at a first speed, and the cloth is subjected to jump stitching or normal sewing at the first speed; The cloth position is detected in real time, and when the cloth moves to a predetermined position, the cloth is dragged by a cloth-drag wheel to move at a second speed, and the cloth is sewn densely at the second speed; The second speed is less than the first speed.

2. The encrypted sewing control method according to claim 1, characterized in that: The skip stitch, the normal sewing and the encrypted sewing correspond to form a skip stitch area, a normal sewing area and an encrypted sewing area respectively. Along the sewing path, the encrypted sewing area is adjacent to the upstream and / or downstream of the skip stitch area.

3. The encrypted sewing control method according to claim 1, characterized in that: The fabric is sewn by the upper thread driven by the machine needle and intersecting with the lower thread, wherein when the encrypted sewing is performed, the tension of the upper thread is also increased compared with the normal sewing.

4. The encrypted sewing control method according to claim 3, characterized in that: Increasing the tension of the upper thread is selected from at least one of the following methods: extending the extension path of the surface line; A frictional resistance is applied to the face line.

5. The encrypted sewing control method according to claim 3, characterized in that: The fabric is driven to move forward by means of a presser foot and a feed dog that cooperate with each other, and when the tension of the upper thread is increased, the pressure of the presser foot is also reduced in a linked manner.

6. A sewing device, comprising a cloth feeding device for driving cloth to move forward, and a sewing device for sewing cloth, wherein the cloth feeding device comprises a cloth dragging wheel for dragging the cloth to move forward, and the sewing device comprises a thread clamp assembly for passing an upper thread and a needle for carrying the upper thread to reciprocate between two sides of the cloth, characterized in that: The movement speed of the mopping wheel is adjustable to implement the encrypted sewing control method according to any one of claims 1 to 5.

7. The sewing device according to claim 6, characterized in that The sewing equipment also includes: Sensor, used to detect the fabric and provide corresponding position signal; The controller receives the position signal and controls the mop wheel to adjust the movement speed accordingly.

8. The sewing device according to claim 7, characterized in that The wire clamp assembly comprises: The front wire-passing plate is provided with a first wire-passing hole; The rear wire-passing plate is provided with a second wire-passing hole; The thread beating rod is provided with a third thread passing hole, the upper thread passes through the first thread passing hole, the third thread passing hole and the second thread passing hole in sequence, and the thread beating rod is movably installed and controlled by the controller to change the tension of the upper thread.

9. The sewing device according to claim 8, characterized in that The cloth feeding device also includes a presser foot and a feed dog that cooperate with each other to clamp and move the cloth. The pressure of the presser foot is adjustable and controlled by the controller. The pressure of the presser foot is adjusted in conjunction with the tension of the surface thread.

10. The sewing device according to claim 9, characterized in that The sewing equipment also includes: A feedback device detects an operating signal and feeds it back to the controller so that the controller can drive the mop wheel, the presser foot and the thread clamp assembly accordingly. The operating signal is related to the movement speed of the mop wheel, the pressure of the presser foot, and the tension of the upper thread.

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