Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Composite material sewing method

A composite material and sewing needle technology, which is applied in the field of preformed composite material processing and composite material suture, can solve the problems of high cost of suture platform and lack of versatility, so as to prevent off-line, facilitate transfer, and reduce needle drop Effect

Active Publication Date: 2020-07-17
CHENGDU AIRCRAFT INDUSTRY GROUP
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the lack of versatility and high cost of the existing sewing platform in the seam, the present invention provides a sewing method for composite materials that can sew different parts, improve the quality of sewing, and reduce costs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite material sewing method
  • Composite material sewing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] See figure 2 , a kind of sewing method of composite material of the present invention, the steps are:

[0021] S1 Fix the PMI foam pad under the composite parts that need to be stitched;

[0022] S2 Set a plastic film between the composite material part and the PMI foam pad;

[0023] S3 uses the thread hole to be set at the tip of the sewing needle and the suture passes through the composite material and then plunges into the PMI foam;

[0024] S4 Lift the sewing needle so that the suture remains in the composite part and PMI foam;

[0025] S5 Repeat steps S3 and S4 until the stitching is completed.

Embodiment 2

[0027] See figure 2 , a method for improving stitching quality, comprising composite material parts 1, sutures 2, sewing needles 3, plastic film 4, arranging PMI foam pads 5 on a table top 6, and using double-sided between the table top 6 and the PMI foam pad 5 Tape bonding; PMI foam pad 5 thickness is greater than or equal to 30mm, and area is less than or equal to the area of ​​table top 6; PMI foam pad 2 can be replaced according to the size of the stitched parts, the number of times of use, etc.; stick the plastic film 4 around the PMI foam pad 5 with tape When sewing, the composite material part 1 is placed on the plastic film 4, and the sewing needle 3 passes through the sewing part with the suture 2, and then passes through the plastic film 4 and then plunges into the PMI foam pad 5, because the sewing needle 3. It can move up and down freely in the PMI foam, and at the same time, the suture is retained by the friction of the PMI foam, and there is no need to design a ...

Embodiment 3

[0029] The present invention is a method for improving the sewing quality. During the sewing work, the composite material part 1 is placed on the plastic film 4, and when the sewing needle 3 moves downward, after passing through the composite material part 1 with the suture 2, the sewing The needle 3 carries the suture 2 through the plastic film 4 and then plunges into the PMI foam pad 5. The friction between the needle 3 and the PMI foam makes the suture 2 stay in the PMI foam pad 5; the suture 2 is covered by the PMI foam. Pad 5 bites, and like this suture thread 2 just is difficult to leave composite material part 1 with the upward movement of suture needle 3 again, has avoided the occurrence of the needle dropping problem, has improved suturing quality. After the composite material part 1 is stitched, the adhesive tape for pasting the plastic film 4 and the PMI foam pad 5 is peeled off, and the plastic film 4 and the composite material part 1 are taken off from the PMI foam...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a composite material sewing method. The method comprises the steps that S1, a PMI foam pad is fixedly arranged below a composite material workpiece needing to be sewn; S2, a plastic film is arranged between the composite material workpiece and the PMI foam pad; S3, a sewing needle with a thread hole formed in the tip end penetrates through the composite material workpiece and then is inserted into PMI foam; S4, the sewing needle is lifted, so that the sewing thread is left in the composite material workpiece and the PMI foam; and S5, the step S3 and the step S4 are repeated until sewing is completed. The PMI foam pad can be replaced according to the size and the use frequency of the workpiece, and is flexible and rapid; the plastic film is additionally arranged, so that transferring is facilitated, and thread disengagement is prevented; a foam table top and the plastic film are adopted, sinking or hollowing does not need to be arranged on the table top accordingto the sewing track, the method can be used for sewing different workpieces, universality is improved, and manufacturing cost is reduced; and friction force of the sewing needle is increased during sewing, the sewing thread can be better left in the workpiece, sewing quality is improved, the needle falling condition is reduced, and efficiency is improved.

Description

technical field [0001] The invention relates to the field of processing preformed composite materials, in particular to the technical field of seam-stitching of composite materials. Background technique [0002] The suture technology is a technology that uses sutures to form two-dimensional fabrics into quasi-three-dimensional fabrics or to connect fabrics into an overall structure. Seamed fabric reinforced composites have excellent interlayer properties, impact damage tolerance and low cost, and are currently highly valued by the aerospace community at home and abroad. Composite seams are an important seaming method and are widely used. Lin-sewing is a single-needle and single-thread sewing method. During the sewing process, the suture is left inside the sewing part by the friction between the sewing needle and the sewing part, and no knots are left inside the part. Minor damage, but sutures come apart easily, see figure 1 . Since the sewing needle will penetrate the en...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B29C65/62
CPCB29C65/62
Inventor 杨龙英黄当明刘兰余宁
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com