CN111041717A

CN111041717A - Control method of rear suction type bird-nest-free device

Info

Publication number: CN111041717A
Application number: CN201911376678.9A
Authority: CN
Inventors: 朱强; 罗金刚; 杨丹
Original assignee: Xian Typical Industry Co Ltd
Current assignee: Xian Typical Industry Co Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-04-21

Abstract

The invention relates to the technical field of sewing, in particular to a control method of a rear suction type bird nest-free device. The working time of the bird-nest-free device is adjusted on the basis of the technology of the rear bird-nest-free device through program control, and the wire hooking action is executed, meanwhile, the wire bonding action is added, the wire loop generated at the position of a machine needle is eliminated, and then the wire hooking is carried out. The method comprises the following steps: 1) after the trimming is finished, the air cylinder assembly starts to drive the wire hook to hook after the time set by the delay parameter T03 is reached, the wire hooking is finished after the time set by the delay parameter T04 is reached, timing is started while the wire hooking is finished, the wire bonding assembly starts to wire bond and loosen after the time set by the delay parameter T11 is reached, and the wire bond and the thread loosen after the time set by the delay parameter T12 is reached; 2) when the time of the time delay parameter T03 is reached to execute the wire hooking action, the electronic control starts timing, after the time of the time delay parameter T11 is reached, the wire bonding component starts wire bonding, and after the time of the time delay parameter T12 is reached, the wire bonding is finished.

Description

Control method of rear suction type bird-nest-free device

Technical Field

The invention relates to the technical field of sewing, in particular to a control method of a rear suction type bird nest-free device.

Background

The bird nest-free device of the existing back suction structure is arranged at the back part of the machine head, does not occupy any operation space, but has the disadvantages that: after sewing and trimming, a small wire loop is possibly generated at the threading position of a machine needle, and due to the reason of a rear suction structure, when the wire hooks the wire, the wire loop is just passed, the wire hooking cannot be finished, and the stability of the bird-nest-free device is influenced.

The control method of the suction type bird-nest-free device before and after the eyes comprises the following steps: after the trimming is finished in sewing at every turn, according to the set time, the line colludes the beginning action, colludes the back at pinhole department and resets with the facial line, through in the reed with the inhale line hole of facial line centre gripping presser foot subassembly, after the line colludes, the routing mechanism begins the routing, for sewing next time provides the quantity of thread, after sewing the beginning next time, the facial line of being centre gripping is cut off by the blade of presser foot mechanism, and the suction device sucks away the end of a thread that cuts off simultaneously, and no bird's nest device work is ended, but its drawback lies in: after sewing and trimming, due to the take-up of the take-up mechanism and the thread clamp, a small thread ring is possibly generated at the threading position of the machine needle, when the thread is hooked, the thread can just pass through the thread ring, and the upper thread can not be accurately hooked, so that the bird nest phenomenon is caused, as shown in fig. 3 and 4.

Disclosure of Invention

In view of the above, the present invention provides a method for controlling a rear-suction bird-nest-free device, which adjusts the working timing of each component of the bird-nest-free device based on the existing rear-mounted bird-nest-free device technology through program control, increases wire bonding actions while executing wire hooking actions, eliminates wire loops generated at needles, and then performs wire hooking actions.

In order to solve the problems in the prior art, the technical scheme of the invention is as follows: a control method of a back suction type bird-nest-free device is characterized by comprising the following steps: the method comprises the following steps:

1) after the sewing and thread cutting are finished, the cylinder assembly starts to drive the thread hook to hook after the time set by the delay parameter T03, the thread hooking is finished after the time set by the delay parameter T04 is reached, the system starts to time while the thread hooking is finished, the thread bonding assembly starts to perform thread bonding and thread loosening after the time set by the delay parameter T11 is reached, and the thread bonding and thread loosening are finished after the time set by the delay parameter T12 is reached;

2) when the time of the time delay parameter T03 is reached, the wire hooking action is started, the electronic control starts timing, after the time of the time delay parameter T11 is reached, the wire bonding component starts wire bonding, and after the time of the time delay parameter T12 is reached, the wire bonding is finished.

Compared with the prior art, the invention has the following advantages:

according to the invention, by changing the action time of each component of the bird-nest-free device, the phenomenon that a wire loop is formed at a needle after wire shearing is effectively solved, the condition that a wire hook cannot reach the wire is avoided, and the stability of the bird-nest-free device is improved.

Drawings

FIG. 1 is a schematic view of the installation of a back suction bird-nest-free device;

FIG. 2 is a control flow reference diagram of the present invention;

FIG. 3 is a diagram illustrating a line hooking error in the present control method;

FIG. 4 is a diagram of sewing effect after thread hooking error in the current control method;

FIG. 5 is a view showing the sewing effect of the present invention

Description of reference numerals: 1-routing component, 2-cylinder component, 3-wire hook, 4-presser foot component, 5-pressing rod and 6-machine head.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides a control method of a rear suction type bird-nest-free device, which comprises the following steps of, as shown in figure 2,

1. after the sewing and thread cutting are finished, the cylinder assembly 2 starts to drive the thread hook 3 to perform thread hooking action after the time set by the time delay parameter T03 is reached, the thread hooking is finished after the time set by the time delay parameter T04 is reached, the system starts to time when the thread hooking is finished, the thread bonding assembly 1 starts to perform thread bonding and thread loosening after the time set by the time delay parameter T11 is reached, and the thread bonding and the thread loosening are finished after the time set by the time delay parameter T12 is reached.

2. When the time of the time delay parameter T03 is reached and the wire hooking action is started, the electronic control starts timing, after the time of the time delay parameter T11 is reached, the wire bonding component 1 starts wire bonding, and after the time of the time delay parameter T12 is reached, the wire bonding is finished.

The structure of the rear suction type bird-nest-free device adopted by the method comprises a routing assembly 1, an air cylinder assembly 2, a wire hook 3, a presser foot assembly 4, a pressing rod 5 and a machine head 6; the routing assembly 1 is arranged on the machine head 6, the air cylinder assembly 2 and the wire hook 3 are arranged on the presser foot assembly 4, and the presser foot assembly 4 is arranged on the pressing rod 5, as shown in figure 1.

The method of the invention can prevent the bird nest phenomenon and improve the stability of the device without the bird nest, as shown in figure 5.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A control method of a back suction type bird-nest-free device is characterized by comprising the following steps: the method comprises the following steps:

1) after sewing and thread cutting are finished, the cylinder assembly (2) starts to drive the thread hook (3) to hook after the time set by the delay parameter T03 is reached, the thread hooking is finished after the time set by the delay parameter T04 is reached, the system starts to time when the thread hooking is finished, the routing assembly (1) starts to route and release after the time set by the delay parameter T11 is reached, and the routing and release are finished after the time set by the delay parameter T12 is reached;

2) when the time of the time delay parameter T03 is reached and the wire hooking action is started, the electronic control starts timing, after the time of the time delay parameter T11 is reached, the wire bonding component (1) starts wire bonding, and after the time of the time delay parameter T12 is reached, the wire bonding is finished.