An experimental effort on the impact of hot press forming process parameters on tensile, flexural & impact properties of bamboo fiber composites with the help of Taguchi experimental design

2018 ◽  
Vol 5 (9) ◽  
pp. 20210-20216 ◽  
Author(s):  
Nabanita Banik
Keyword(s):  
Experimental Design ◽  
Process Parameters ◽  
Fiber Composites ◽  
Bamboo Fiber ◽  
Taguchi Experimental Design ◽  
Hot Press ◽  
Forming Process ◽  
Hot Press Forming ◽  
The Impact ◽  
Experimental Effort

Fabrication of Binder-Free Green Composite Using Bamboo Fibers Extracted with a Machining Center

2010 ◽  
Vol 447-448 ◽  
pp. 760-764 ◽  
Author(s):  
Keiji Ogawa ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Mitsuaki Taniguchi ◽  
Sachiko Ogawa
Keyword(s):  
Present Report ◽  
Bamboo Fiber ◽  
Hot Press ◽  
Green Composite ◽  
Forming Process ◽  
Machining Center ◽  
Press Forming ◽  
Hot Press Forming ◽  
Binder Free ◽  
Bamboo Fibers

Bamboo grows faster than other renewable natural materials. Bamboo fiber, in particular, has attracted attention as an environmentally superior material. Therefore, we proposed a sustainable manufacturing system using bamboo. An extraction method of bamboo fibers end-milled using a machining center with in-situ measurement is proposed. Bamboo fibers with high precision shape are efficiently acquired. In the present report, we propose the fabrication of binder-free composite by a hot press forming method that only uses bamboo fibers extracted by a machining center. We experimentally demonstrated various hot press forming conditions and achieved proper forming conditions to optimize the forming process. We also made various three-dimensional shapes considering the practical applications of the formed binder-free bamboo fiber moldings.

Effect of Process Parameters on Dimensional Accuracy of the Part in Hot Press Forming Process

2012 ◽  
Vol 189 ◽  
pp. 250-254
Author(s):  
An Long ◽  
Rui Ge ◽  
Hui Wang ◽  
Yin Chen
Keyword(s):  
Process Parameters ◽  
Dimensional Accuracy ◽  
Hot Press ◽  
Forming Process ◽  
Optical Scanner ◽  
Press Forming ◽  
Hot Press Forming ◽  
Actual Part

To research the problem of part’s dimensional accuracy error easily occurred in hot press forming, a B-Pillar on one domestic car was set as example, the dimensional of the actual part and its model diagram were compared by means of ATOS optical scanner. By recording the the process parameters used in practical production, the effect trend of three key process parameters on part’s dimensional accuracy was summarized, process parameters suitable for practical production were gained.

scholarly journals Effect of initial blank temperature in hot press forming towards 22MnB5 springback failure

2019 ◽  
Vol 13 (2) ◽  
pp. 5137-5149
Author(s):  
C. H. Ng ◽  
C. F. Lai ◽  
S. N. M. Yahaya ◽  
S. Shamsudin ◽  
S. N. A. S. Ahmad ◽  
...  
Keyword(s):  
High Strength ◽  
Boron Steel ◽  
Hot Press ◽  
Forming Process ◽  
Quenching Rate ◽  
Press Forming ◽  
Initial Blank ◽  
Hot Press Forming ◽  
Formed Part ◽  
The Impact

The springback failure of ultra-high strength boron steel (22MnB5) in hot press forming (HPF) process was characterized under bending and membrane conditions. Hot press forming for U–shaped parts with ultra-high strength boron steel were experimented and simulated to study the effect of initial blank temperatures on springback failure in the automotive industry. The results specify the various preheated temperature of 22MnB5 blank effect toward springback occurrences with reference to hot press forming dies design. ANSYS Workbench was used to verify finite element (FE) simulations of the processes in order to consolidate the knowledge of springback. The validated numerical simulation model were used in analyzing the stress and strain distributions along the formed part in the FE models, it was found that the springback angle was related in averaging value throughout quenching, regardless of the forming conditions. Springback failure mainly caused dimension deviation in hot press form parts due to the impact of thermal restoring moments and quenching rate of hot press forming process.

Binder-Free Green Composite Using Bamboo Fibers Extracted with a Machining Center-Investigation of Optimal Bamboo Fiber Length

2014 ◽  
Vol 625 ◽  
pp. 355-359
Author(s):  
Shinya Imura ◽  
Keiji Ogawa ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama
Keyword(s):  
Sustainable Manufacturing ◽  
Bamboo Fiber ◽  
Hot Press ◽  
Green Composite ◽  
Forming Process ◽  
Machining Center ◽  
Press Forming ◽  
Hot Press Forming ◽  
Binder Free ◽  
Bamboo Fibers

Bamboo grows faster than other renewable natural materials. Bamboo fiber, in particular, has attracted attention as an environmentally superior material. Therefore, we propose a sustainable manufacturing system using bamboo. A method is also proposed for extracting bamboo fibers end-milled using a machining center with in-situ measurement. Bamboo fibers with highly precise shapes are efficiently acquired. Previously, we proposed the fabrication of a binder-free composite by a hot press forming method that only uses bamboo fibers extracted by a machining center. We experimentally demonstrated various hot press forming conditions and achieved proper ones to optimize the forming process. However, we have not yet constructed a method to obtain the best fiber extracting and molding conditions considering both its efficiency and performance. Therefore, in this report, we investigate the influence of the length of used bamboo fiber on the characteristics of the molded products, as its length deeply affects the extracting efficiency and focuses on a degradable plastic as a standard of molded product strength.

Experimental Assessment of High Temperature Formability of Boron Steel Sheet Manufactured With a Spring Compound Bending Die

2012 ◽  
Vol 134 (2) ◽  
Author(s):  
Yang Li ◽  
Yong-Phil Jeon ◽  
Chung-Gil Kang
Keyword(s):  
Mechanical Properties ◽  
Heating Temperature ◽  
Boron Steel ◽  
Hot Press ◽  
Forming Process ◽  
Steel Sheets ◽  
Press Forming ◽  
Bending Process ◽  
Tension Testing ◽  
Hot Press Forming

Bending behavior occurs in the hot press forming process, resulting in many cases of failure during forming. To address the problem of cracking and improve the formability and mechanical properties of boron steel sheets in the bending process, an experiment has been carried out by using a spring compound bending die. Also, a comparison has been made between the traditional U-bending die and the spring compound bending die with regard to formability. The influence of the parameters for hot press forming such as the heating temperature, punch speed, and die radii on the mechanical properties and microstructure was analyzed by tension testing and metallographic observations.

scholarly journals Characterizing Mat Formation of Bamboo Fiber Composites: Horizontal Density Distribution

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1198
Author(s):  
Yu’an Hu ◽  
Mei He ◽  
Kate Semple ◽  
Meiling Chen ◽  
Hugo Pineda ◽  
...  
Keyword(s):  
Density Distribution ◽  
Fiber Composite ◽  
Fiber Composites ◽  
Density Variation ◽  
Bamboo Fiber ◽  
Wood Composites ◽  
Forming Process ◽  
Bamboo Culm ◽  
Basic Understanding ◽  
Panel Thickness

Bamboo fiber composite (BFC) is a unidirectional and continuous bamboo fiber composite manufactured by consolidation and gluing of flattened, partially separated bamboo culm strips into thick and dense panels. The composite mechanical properties are primarily influenced by panel density, its variation and uniformity. This paper characterized the horizontal density distribution (HDD) within BFC panels and its controlling factors. It revealed that HDD follows a normal distribution, with its standard deviation (SD) strongly affected by sampling specimen size, panel thickness and panel locations. SD was lowest in the thickest (40 mm) panel and largest-size (150 × 150-mm2) specimens. There was also a systematic variation along the length of the BFC due to the tapering effect of bamboo culm thickness. Density was higher along panel edges due to restraint from the mold edges during hot pressing. The manual BFC mat forming process is presented and found to effectively minimize the density variation compared to machine-formed wood composites. This study provides a basic understanding of and a quality control guide to the formation uniformity of BFC products.

scholarly journals Study on Hot Press Forming Process of Large Curvilinear Generatrix Workpiece of Ti55 High-Temperature Titanium Alloy

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 827 ◽  
Author(s):  
Fengyong Wu ◽  
Wenchen Xu ◽  
Zhongze Yang ◽  
Bin Guo ◽  
Debin Shan
Keyword(s):  
Titanium Alloy ◽  
High Temperature ◽  
Fem Simulation ◽  
Alloy Sheet ◽  
Rolled Sheet ◽  
Strain Rates ◽  
Hot Press ◽  
Forming Process ◽  
Press Forming ◽  
Hot Press Forming

In order to manufacture complex curvilinear generatrix workpieces of high-temperature titanium alloy, the hot tensile behavior of Ti55 alloy sheet was tested and the hot press forming process was investigated using Finite Element Method (FEM) simulation and experiment. The hot tensile experiments of Ti55 rolled sheet were conducted at the temperatures of 800–900 °C with the strain rates of 0.001–0.1 s−1. According to the results of hot tensile tests and microstructure evolution, the proper hot press forming parameters were determined as the temperature of 850 °C and the strain rates of 0.001–0.01 s−1. The wrinkling mechanism in the transition region was analyzed and the initial blank sheet geometry was optimized by FE simulation of hot press forming. The two-step hot press forming process was better to produce the complex sheet workpiece of Ti55 alloy than the one-step hot forming scheme, which could restrain the wrinkling trend and ensure the microstructure and mechanical properties of the hot formed workpieces.

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