Mechanical model for predicting thrust force with tool wear effects in drilling of unidirectional CFRP

2021 ◽  
Vol 262 ◽  
pp. 113601
Author(s):  
Yu Bai ◽  
Zhen-yuan Jia ◽  
Rao Fu ◽  
Jia-xuan Hao ◽  
Fu-ji Wang
Keyword(s):  
Tool Wear ◽  
Mechanical Model ◽  
Thrust Force

THRUST FORCE PREDICTION MODEL FOR DRILLING UNIDIRECTIONAL CARBON PLASTICS WITH WEAR OF THE CUTTING TOOL

2021 ◽  
Vol 2 ◽  
pp. 100-108
Author(s):  
V.I. GOLOVIN ◽  
S.YU. RADCHENKO
Keyword(s):  
Carbon Fiber ◽  
Tool Wear ◽  
Prediction Model ◽  
Cutting Tool ◽  
Thrust Force ◽  
Contact Conditions ◽  
Force Prediction ◽  
Geometric Characteristics ◽  
Drill Tool

One of the most important tasks in the production of carbon fiber products is to ensure the specified accuracy and quality of the drilled holes. A model for predicting the thrust force, taking into account the degree of tool wear, is proposed. First, the geometric characteristics of the wear of the spiral drill tool are analyzed. Further, the contact conditions between the drill and the carbon fiber are determined in accordance with the geometric characteristics of the tool wear. Based on the mechanics of the contact interaction of surfaces, the thrust forces of the main cutting edges and the chisel edge are modeled, taking into account the degree of tool wear. The results obtained are integrated into the thrust force prediction model. An example of an experimental study of the drilling carbon fiber is given. The results obtained show a fairly accurate prediction of the cutting force, taking into account the wear of the cutting tool.

Surface characteristics and machining performance of TiAlN-, TiN- and AlCrN-coated tungsten carbide drills

2018 ◽  
Vol 233 (4) ◽  
pp. 1075-1086 ◽  
Author(s):  
Chaiya Dumkum ◽  
Pakin Jaritngam ◽  
Viboon Tangwarodomnukun
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
Tungsten Carbide ◽  
Thrust Force ◽  
Surface Characteristics ◽  
Average Error ◽  
Force Model ◽  
Machining Performance ◽  
Coating Materials ◽  
Drilling Performance

This article presents a comprehensive analysis of surface characteristics and drilling performance of uncoated and coated tungsten carbide drills. The single- and double-layer coatings of TiN, TiAlN and AlCrN were examined in terms of surface roughness, microhardness and crack resistance. In addition, drilling torque and thrust force were experimentally measured and compared to the developed models based on the drilling mechanics and drill geometries. Tool wear and hole surface roughness were also considered to assess the machining performance of different coated tools. The results revealed that all coated drills can offer better cut surface quality, 28% lower cutting loads and longer tool life than the uncoated drills. Although AlCrN was found to be the hardest coating material among the others, it caused large wear on the cutting edges and poor surface roughness of produced holes. The lowest torque and thrust force were achievable using TiN-coated drill, while the use of TiAlN coating resulted in the lowest surface roughness and smallest tool wear. Furthermore, the drilling torque and thrust force model developed in this study were found to correspond to the experimental measures with the average error of 8.4%. The findings of this work could facilitate the selection of coating materials to advance the machining performance.

Investigation on Deep Hole Trepanning of TC10 Titanium Alloy

2019 ◽  
Author(s):  
Xiaolan Han ◽  
Zhanfeng Liu
Keyword(s):  
Titanium Alloy ◽  
Tool Wear ◽  
Titanium Alloys ◽  
Process Parameters ◽  
Thrust Force ◽  
Large Diameter ◽  
Manufacturing Cost ◽  
Deep Hole ◽  
Technical Problems ◽  
Material Utilization

Abstract Titanium alloy is a typical hard-to-machine material, and has a relatively expensive material price. For deep-hole tubes made of titanium alloys, the material utilization rate of direct deep-hole drilling is relatively low, especially for large diameter holes. Deep-hole trepanning provides an effective method that reduces manufacturing cost and improves the material utilization which is used on larger diameter bars. In this paper, deep-hole trepanning tests are carried out on the TC10 titanium alloys to resolve the key technical problems. The thrust force and torque, tool wear, and chip morphology are analyzed based on the different process parameters. The results show that appropriate process parameters can remove the chips easily and reduce the thrust force and tool wear. The titanium alloy deep-hole trepanning has a good drilling effect and solves the problem of drilling deep, large diameter holes in titanium alloy tubes, which has practical significance for reducing production cost and improving material utilization.

Research on the Effect of Low Temperature on the Performance of Drilling Carbon Fibre Reinforced Polymer and Ti Stack Materials

2012 ◽  
Vol 723 ◽  
pp. 30-34 ◽  
Author(s):  
Xi Wang ◽  
Cheng Yong Wang ◽  
Run Ping Shi ◽  
Yue Xian Song ◽  
Ying Ning Hu
Keyword(s):  
Low Temperature ◽  
Tool Wear ◽  
Thrust Force ◽  
Fiber Reinforced Polymer ◽  
Drilling Force ◽  
Reinforced Polymer ◽  
Drilling Temperature ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer

The thermal conductivity of carbon fiber reinforced polymer(CFRP) and titanium alloy is lower which caused the increasing of drilling temperature and larger tool wear resistance. The low temperature air is aided for the drilling of laminated stack board of CFRP/Ti with double apex angles carbide drill at different feed rate. The drilling force and the quality of hole are analyzed. The results showed that the low temperature air can reduce the tool wear and the thrust force effectively.

scholarly journals An Investigation of the Effect of Parameters and Chip Slenderness Ratio on Drilling Process Quality of AISI 1050 Steel

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Zülküf Demir ◽  
Rifat Yakut
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
Thrust Force ◽  
Slenderness Ratio ◽  
Chip Morphology ◽  
Drilling Process ◽  
Steel Alloy ◽  
Drilling Operations ◽  
Machining Operations

The chip slenderness ratio is a vital parameter in theoretical and applicable machining operations. In predrilled drilling operations of AISI 1050 steel alloy, HSS drills were employed, and the effect of the selected parameters on the chip slenderness ratio and also the effect of the chip slenderness ratio on the thrust force, surface roughness, drilled hole delamination, tool wear, and chip morphology were investigated. The major parameters, influential on the chip slenderness ratio, were feed rate and point angle, while spindle speed was too small to be negligible. With increasing the chip slenderness ratio, the thrust force and the tool wear decreased, which resulted in appropriate chip morphology, but there were increases in surface roughness. However, the chip slenderness ratio had no effect on the drilled hole delamination.

scholarly journals Experimental Investigation On Machining Performance During Orbital Drilling of CFRP

2021 ◽  
Author(s):  
Linghao Kong ◽  
Dong Gao ◽  
Yong Lu ◽  
Pengfei Zhang
Keyword(s):  
Tool Wear ◽  
Thrust Force ◽  
Cutting Temperature ◽  
Cutting Parameters ◽  
Machining Performance ◽  
Machining Quality ◽  
Orbital Drilling ◽  
Orthogonal Experiments ◽  
Hole Making ◽  
Tool Diameter

Abstract As the most promising CFRP hole making method, orbital drilling is widely concerned. This paper aims to understand the influence of the cutting parameters, tool diameters and ratio between milling and drilling (Rm&d) on thrust force, cutting temperature, tool wear and machining quality in CFRP orbital drilling. The effects of cutting parameters on thrust force and cutting temperature were studied by orthogonal experiments, and experiments were performed to investigate the variations of tool diameters, ratio between drilling and milling on thrust force, cutting temperature, tool wear and machining quality. The experimental results show that the tangential feed rate has no apparent effects on thrust force, but it appreciably impacts on the cutting temperature. The selection of tool diameter and the Rm&d has specific influence on tool wear, machining quality and cutting temperature. The result is helpful for selecting cutting parameters and tool diameters for high quality holes machining in CFRP orbital drilling.

Effects of Cutting Parameters on Tool Wear and Thrust Force in Drilling Nickel-Titanium (NiTi) Alloys Using Coated and Uncoated Carbide Tools

2018 ◽  
Vol 791 ◽  
pp. 111-115 ◽  
Author(s):  
Rosmahidayu Rosnan ◽  
Azwan Iskandar Azmi ◽  
Muhamad Nasir Murad
Keyword(s):  
Wear Resistance ◽  
Tool Wear ◽  
Thrust Force ◽  
Cutting Parameters ◽  
Nickel Titanium ◽  
Burr Formation ◽  
Machining Processes ◽  
Drilling Parameters ◽  
Mechanical Machining ◽  
Coated Carbide

The difficulties of machining nickel-titanium alloys are due to their high ductility and super-elasticity, strong strain-hardening, and excellent wear resistance. These characteristics lead to poor chip breakability, high cutting forces, rapid and aggressive tool-wear, as well as excessive burr formation during mechanical machining processes. The present study addresses these issues by evaluating the effects of drilling parameters and drill bit coatings on the growth of tool wear and development of the drilling thrust force. The findings from this research indicate that the TiAlN coated carbide drill was found to significantly improve the wear resistance of the cutting tool. Likewise, the results of thrust force development are consistent with the trends of tool wear growth for all of the tested carbide drills.

Drilling of Carbon Fibre Composites: A Review

2014 ◽  
Vol 903 ◽  
pp. 3-8 ◽  
Author(s):  
Aishah Najiah Dahnel ◽  
Stuart Barnes ◽  
Pipat Bhudwannachai
Keyword(s):  
Tool Wear ◽  
Carbon Fibre ◽  
Feed Rate ◽  
Cutting Tool ◽  
Thrust Force ◽  
Fibre Composite ◽  
Cutting Speed ◽  
Heterogeneous Structure ◽  
Drilling Performance ◽  
Carbon Fibre Composites

Machining of Carbon Fibre Composite (CFC), particularly drilling is frequently employed in many industries especially when dealing with joining, assembly and structural repair of the parts. This paper summarizes the properties of the CFC as well as the appropriate material and geometry of the cutting tool that should be used when drilling of the CFC in order to optimize the drilling performance. In addition, this work also presents the literature review on the relationship between cutting speed, feed rate, tool wear, thrust force and damage of the drilled CFC. The nature and heterogeneous structure of CFC often resulted in difficulty during their machining in terms of rapid tool wear and high thrust force. As a result, this always results in the damage of the drilled parts. Furthermore, higher cutting speed and lower feed rate are also recognized as significant factors which contribute to rapid wear of the cutting tool. Therefore, the use of tungsten carbide cutting tools, cutting fluids and cryogenic machining is seen to be a practical technique in optimizing the drilling performance involving CFC. In general, this work intends to provide a basic guideline and understanding regarding drilling of the CFC.

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