scholarly journals An In-Process Intervention to Mitigate the Effect of Built-Up Edges in Micromilling

2017 ◽  
Vol 5 (4) ◽  
Author(s):  
Robert G. Altman ◽  
James F. Nowak ◽  
Johnson Samuel
Keyword(s):  
Machining Process ◽  
Burr Formation ◽  
Tool Runout ◽  
Part Geometry ◽  
Intervention Technique ◽  
Mechanical Removal ◽  
Working Volume ◽  
G Code ◽  
Critical Process Parameters ◽  
Critical Process

This paper is focused on developing an in-process intervention technique that mitigates the effect of built-up edges (BUEs) during micromilling of aluminum. The technique relies on the intermittent removal of the BUEs formed during the machining process. This is achieved using a three-stage intervention that consists first of the mechanical removal of mesoscale BUEs, followed by an abrasive slurry treatment to remove the microscale BUEs. Finally, the tool is cleaned using a nonwoven fibrous mat to remove the slurry debris. An on-machine implementation of this intervention technique is demonstrated, followed by a study of its influence on key micromachining outcomes such as tool wear, cutting forces, part geometry, and burr formation. In general, all relevant machining measures are found to improve significantly with the intervention. The key attributes of this intervention that makes it viable for micromachining processes include the following: (i) an experimental setup that can be implemented within the working volume of the microscale machine tool; (ii) no removal of the tool from the spindle, which ensures that the intervention does not change critical process parameters such as tool runout and offset values; and (iii) implementation in the form of canned G-code subroutines dispersed within the regular micromachining operation.

scholarly journals Designing ultra-small nanostructured lipid carriers: critical process parameters

2020 ◽  
Author(s):  
Maria Mendes ◽  
João Basso ◽  
João Sousa ◽  
Alberto Pais ◽  
Carla Vitorino
Keyword(s):  
Process Parameters ◽  
Nanostructured Lipid Carriers ◽  
Critical Process Parameters ◽  
Critical Process

Development of Machining Method for Micromold

2010 ◽  
Vol 154-155 ◽  
pp. 310-313
Author(s):  
Xue Feng Bi ◽  
Jin Sheng Wang ◽  
Jia Shun Shi ◽  
Ya Dong Gong
Keyword(s):  
Tool Path ◽  
Simulation Software ◽  
Machining Process ◽  
Machining Parameters ◽  
Machining Simulation ◽  
Post Process ◽  
Micro Parts ◽  
G Code ◽  
Micro Machine ◽  
3D Software

Micromold manufacturing technology is very important for the mass production of micro parts. In this paper, modeling of micromold is established in 3D software firstly. The 3D modeling is input into machining simulation software Master CAM to simulate machining process. The machining parameters and cutting tool path are optimized in machining simulation. Machining G code of micromold obtained from post-process program of Master CAM is input into HMI system of Micro Machine Tool (MMT), and hence the micromold will be machined precisely in MMT.

scholarly journals Application of Statistical Design to Assess the Critical Process Parameters of Ethanol Injection Method for the Preparation of Liposomes

2019 ◽  
Vol 18 (1) ◽  
pp. 103-111 ◽  
Author(s):  
Sayani Bhattacharyya ◽  
Bharani S Sogali
Keyword(s):  
Particle Size ◽  
Process Parameters ◽  
Particle Size Analysis ◽  
Polydispersity Index ◽  
Size Analysis ◽  
Ethanol Injection ◽  
Injection Method ◽  
Critical Process Parameters ◽  
Critical Process ◽  
Ethanol Injection Method

In the present study custom screening design was employed to observe the effect of four critical process parameters on particle size and polydispersity index of the liposomal formulation made by ethanol injection method. The four process parameters selected were lipid ratio, rate of injection, phase volume ratio and rotational speed of magnetic stirring. Eight different liposomal formulations were prepared using the design. The formulations were subjected to particle size analysis. The analysis was done at a significance level p<0.05 and found that the process parameters had significant effect on the particle size and polydispersity index of the formulations. The design was optimized for the individual responses with an overall desirability of more than 50%. Three batches of liposomes were formulated at optimized process parameters which matched the target as predicted by the design. Therefore, it can be concluded that the design was effective in production of nano sized stable monodisperse liposomes by ethanol injection method. Dhaka Univ. J. Pharm. Sci. 18(1): 103-111, 2019 (June)

An investigation on formation of burrs during milling of aluminium alloy under wet condition

2020 ◽  
pp. 095440542097201
Author(s):  
Raj Sekhar Mandal ◽  
Santanu Das ◽  
Partha Pratim Saha
Keyword(s):  
Suitable Condition ◽  
Face Milling ◽  
Machining Process ◽  
Burr Formation ◽  
Depth Of Cut ◽  
Burr Height ◽  
Cutting Velocity ◽  
Wet Condition ◽  
Exit Edge ◽  
Coated Carbide

Undesirable burrs are created out of a machining process. The objective of the present work is to explore the suitable condition to obtain no burr, or negligible burr, around the edge of a machined product at wet condition. Face milling experiments have been carried out on blocks made of aluminum alloy (Alloy-4600M) with a single, coated-carbide inserted cutter for observing the nature of burr formation. Depth of cut has been maintained constant at 3 mm for all sets of experiments. In each experiment set, three cutting velocities (170 m/min, 237 m/min and 339 m/min) and three in-plane exit angles of 30°, 60° and 90° are provided at three different feeds of 0.08 mm/tooth, 0.1 mm/tooth and 0.12 mm/tooth. First set of experiments are done without any exit edge bevel. Similar sets of experiments are carried out with 15° and 30° exit edge bevel angles to find out the condition for minimum burr. The bevel is made of a height of 3 mm. In the present experimental investigation, a minimum burr height of as low as 3 micron is obtained at an in-plane exit angle of 30° and exit edge bevel angle of 15° under the machining condition of 339 m/min cutting velocity and 0.1 mm/tooth feed.

scholarly journals Aeration and Shear Stress Are Critical Process Parameters for the Production of Oncolytic Measles Virus

2019 ◽  
Vol 7 ◽  
Author(s):  
Tanja A. Grein ◽  
Daniel Loewe ◽  
Hauke Dieken ◽  
Tobias Weidner ◽  
Denise Salzig ◽  
...  
Keyword(s):  
Shear Stress ◽  
Process Parameters ◽  
Measles Virus ◽  
Critical Process Parameters ◽  
Critical Process

Experimental Study on Critical Process Parameters Regarding Tension Stringing Construction of 1250mm2 Large-Section Conductor

2013 ◽  
Vol 448-453 ◽  
pp. 2036-2039
Author(s):  
Chun Hua Hu ◽  
Yong Jun Xia ◽  
Junz Hang Li
Keyword(s):  
Experimental Study ◽  
Process Parameters ◽  
Construction Process ◽  
Test Plan ◽  
Large Section ◽  
Critical Process Parameters ◽  
Critical Process ◽  
Test Rack

Critical construction process parameters and necessity of experimental study concerning tension stringing of large-section conductor are elaborated in this paper and in addition, test details related to critical process parameters of tension stringing construction is researched by citing the example of 1250mm2 large-section conductor, according to which test plan is worked out and test rack is designed.

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