Journal of Textile Research ›› 2025, Vol. 46 ›› Issue (01): 197-205.doi: 10.13475/j.fzxb.20240404201

• Machinery & Equipment • Previous Articles     Next Articles

Automatic fabric flipping device based on soft fingers and its application effect

WANG Jianping1,2,3,4, WENG Yuxin1,2,3, SHEN Jinzhu1,2,3(), ZHANG Fan5, LIU Xianke1   

  1. 1. College of Fashion and Art Design, Donghua University, Shanghai 200051, China
    2. Key Laboratory of Clothing Design and Technology, Ministry of Education, Donghua University, Shanghai 200051, China
    3. Shanghai Belt and Road Joint Laboratory of Textile Intelligent Manufacturing, Donghua University, Shanghai 200051, China
    4. Shanghai International College of Design & Innovation, Tongji University, Shanghai 200092, China
    5. Suzhou Rochu Robotics Co., Ltd., Suzhou, Jiangsu 215600, China
  • Received:2024-04-17 Revised:2024-09-20 Online:2025-01-15 Published:2025-01-15
  • Contact: SHEN Jinzhu E-mail:1219101@mail.dhu.edu.cn

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Abstract:

Objective In order to achieve the seamless connection between the automatic equipment in the sewing process and to improve the collaborative work efficiency, the joined fabric pieces after sewing need unfolding before ironing process. In order to optimize the manual repetitive process of fabric retrieval and flipping, the linear movement of a rod driven by a pneumatic drive device was applied to simulate the fabric flipping action by human hands, leading to the design of an automatic fabric flipping device. Combined with soft fingers, this device is expected to automatically grab and separate cloth and unfold two sewed fabrics before the transfer and ironing processes.

Method The fabric flipping device was designed to summarize factors affecting the performance of the device. Its effect was evaluated by the deflection angle and the slip distance, and a two-dimensional 5-level evaluation model was established. Thereafter, three common production fabrics on the market were selected, the two-layer fabric sewing operation was completed to analyze the optimal combination plan for fabric flipping process factors through orthogonal experiments under 5, 10 and 15 mm seam allowances. A prediction model of fabric flipping effect for common production fabrics was built combining multiple regression analysis method.

Results Through the orthogonal test of fabric flipping effect, the influencing factors of fabric flipping effect for different fabrics were discussed. The optimal compatibility combinations of the influencing factors for different fabrics were summarized. This result has extensive applicability and facilitates the application of the fabric flipping device in actual production. By employing the multiple linear regression analysis method, a prediction model for the relationship among the fabric, device structure, and fabric flipping effect was established. The prediction accuracy of the model reached 80%, demonstrating good predictability. Using this model, the actual fabric flipping effect values of different fabrics were predicted, and recommendations for the corresponding fabric parameters, device parameters, and fabric flipping process requirements were achieved.

Conclusion The automatic fabric flipping device designed has the characteristics of simple structure and convenient operation, which enables automatic fabric flipping operation under the coordinated cooperation of soft finger fingers in the sewing process, effectively reducing manual intervention and improving production efficiency. At the same time, the device provides convenience for subsequent operations such as transportation and ironing, providing reference for completing the entire sewing process automation, indicating that automatic fabric flipping technology has good application prospects and reference value in garment industry.

Key words: automatic fabric flipping device, sewing process, soft finger, pneumatic drive, intelligent manufacturing, multiple regression

CLC Number: 

  • TS941.52

Fig.1

Decomposition of manual fabric flipping. (a) Contact fabric; (b) Align fingers to lift fabric; (c) Press and turn over fabric"

Fig.2

Model of soft dual-finger and its states under different pneumatic pressures. (a) Three-dimensional model structure; (b) Atmospheric pressure state; (c) Negative pressure state; (d) Positive pressure state"

Fig.3

Structure diagrams of fabric flipping device from two view. (a) Front view; (b) 3-D side view"

Fig.4

Position layout of fabric flipping device and soft fingers"

Fig.5

Diagram of fabric flipping operation of device. (a) Touch and feel fabric; (b) Grab, lift and press fabric; (c) Flip and flatten fabric"

Fig.6

Diagram of dimension description in evaluation method.(a) Deflection angle a; (b) Slip distane d"

Fig.7

Two-dimensional five-level evaluation model"

Tab.1

Fabric parameters and numbers"

布片
编号		 缝份/
mm		 织物
类型		 面密度/
(g·m-2)		 厚度/
mm		 摩擦因数
经向 纬向
1# 5 纯棉
平纹布		 232.4 0.45 0.18 0.19
2# 10
3# 15
4# 5 涤纶/棉罗纹
针织布		 234.5 1.12 0.65 1.02
5# 10
6# 15
7# 5 涤纶/棉混纺
牛仔布		 287.4 0.62 1.10 0.83
8# 10
9# 15

Fig.8

Description of pressing distance (a) and edge distance (b)"

Tab.2

Factor-level table"

水平 A
下压距离/mm		 B
下降时长/s		 C
边缘距离/mm		 D
平滑时长/s
1 0 2.5 40 0.2
2 3 1.5 90 1.1
3 6 1.0 70 2.0

Tab.3

Fabric flipping effect and orthogonal experiment calculation results for fabric 1#"

试验编号 A B C D 翻布效果评分
1 1 1 1 1 3.33
2 1 2 2 2 4
3 1 3 3 3 4.67
4 2 1 2 3 4
5 2 2 3 1 4.33
6 2 3 1 2 4
7 3 1 3 2 4
8 3 2 1 3 3
9 3 3 2 1 5
k1 4.00 3.78 3.44 4.22
k2 4.11 3.78 4.33 4.00
k3 4.00 4.56 4.33 3.89
R 0.11 0.78 0.89 0.33

Tab.4

Results of single-factor variance analysis"

来源 III类
平方和		 自由度 均方 F检验
统计值		 显著性
修正模型 8.889① 6 1.481 14.286 <0.01
截距 440.037 1 440.037 4 243.21 <0.01
下降时长(B) 3.63 2 1.815 17.5 <0.01
边缘距离(C) 4.741 2 2.37 22.857 <0.01
平滑时长(D) 0.519 2 0.259 2.5 0.107
误差 2.074 20 0.104
总计 451 27
修正后总计 10.963 26

Tab.5

Optimal factor combinations for different fabrics"

布片编号 最佳因素配伍组合
1# A2B3C3D1
2# A2B1C3D2
3# A2B2C3D2
4# A1B1C2D1
5# A3B1C2D1
6# A2B3C2D2
7# A3B2C2D3
8# A3B2C2D2
9# A3B1C2D2

Tab.6

Correlation between fabric flipping effect values and factors"

影响因素 相关性指标 翻布效果值
下压距离(A) 皮尔逊相关性 0.366**
显著性(双尾) 0.001
下降时长(B) 皮尔逊相关性 -0.002
显著性(双尾) 0.989
边缘距离(C) 皮尔逊相关性 0.392**
显著性(双尾) 0.000
平滑时长(D) 皮尔逊相关性 0.017
显著性(双尾) 0.879
织物缝份 皮尔逊相关性 -0.039
显著性(双尾) 0.731
织物面密度 皮尔逊相关性 -0.131
显著性(双尾) 0.243
织物厚度 皮尔逊相关性 -0.385**
显著性(双尾) 0.000
经向摩擦因数 皮尔逊相关性 -0.322**
显著性(双尾) 0.003
纬向摩擦因数 皮尔逊相关性 -0.450**
显著性(双尾) 0.000

Tab.7

Prediction model of fabric flipping effect"

模型因素 非标准化
系数		 标准化
系数		 t 显著性
P值		 共线性
诊断
B 标准
错误		 Beta 容差 VIF
常数项 2.838 0.437 6.491 <0.001
下压距离(A) 0.175 0.039 0.366 4.473 <0.001 1.000 1.000
边缘距离(C) 0.022 0.005 0.392 4.784 <0.001 1.000 1.000
织物厚度 -1.338 0.348 -0.325 -3.846 <0.001 0.938 1.067
经向摩擦因数 -0.749 0.263 -0.241 -2.851 0.006 0.938 1.067

Fig.9

Comparison of actual and predicted values of fabric flipping effect"

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