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All Journal International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Prosiding SNTTM
Ma'arif, Moch. Syamsul
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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COMPARISON OF CHATTER CONTROL OF VARIABLE AND REGULAR HELIX TOOLS IN THE ALUMINUM END-MILLING PROCESS Sonief, Achmad As’ad; Ma'arif, Moch. Syamsul; Pratikto, Pratikto; Juliano, Hans
International Journal of Mechanical Engineering Technologies and Applications Vol. 4 No. 1 (2023)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2023.004.01.6

Abstract

In the chatter, machining operations are undesirable because of the phenomena that affect product results, machining accuracy, tool life, and high operating value. Chatter is a vibration phenomenon that occurs in cutting tools due to the self-excitation of the influence of cutting parameters during the operation process of the machine. Types of chatter in machinery are regenerative and resonant. Because the pitch angles of variable helix tools vary, the helix angles of variable tools produce different tooth passing frequencies on each tool eye next to each other and can be used to prevent and control resonance. This study aimed to compare chatter control from the variable helix and regular-angle tools in the aluminum end milling process. The method is carried out through the end milling process experiment to determine the chatter control of the variable helix and regular-angle tools through the stability loop diagram. The results from this study were obtained by comparing control chatters in the milling process through controlling variable and standard helix angles as a guideline to produce the best surface roughness in the end milling process made from aluminum. The comparison of estimated control charts from variable helix tools is more comprehensive than regular helix tools.
COMPARISON OF CHATTER CONTROL OF VARIABLE AND REGULAR HELIX TOOLS IN THE ALUMINUM END-MILLING PROCESS Sonief, Achmad As’ad; Ma'arif, Moch. Syamsul; Pratikto, Pratikto; Juliano, Hans
International Journal of Mechanical Engineering Technologies and Applications Vol. 4 No. 1 (2023)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2023.004.01.6

Abstract

In the chatter, machining operations are undesirable because of the phenomena that affect product results, machining accuracy, tool life, and high operating value. Chatter is a vibration phenomenon that occurs in cutting tools due to the self-excitation of the influence of cutting parameters during the operation process of the machine. Types of chatter in machinery are regenerative and resonant. Because the pitch angles of variable helix tools vary, the helix angles of variable tools produce different tooth passing frequencies on each tool eye next to each other and can be used to prevent and control resonance. This study aimed to compare chatter control from the variable helix and regular-angle tools in the aluminum end milling process. The method is carried out through the end milling process experiment to determine the chatter control of the variable helix and regular-angle tools through the stability loop diagram. The results from this study were obtained by comparing control chatters in the milling process through controlling variable and standard helix angles as a guideline to produce the best surface roughness in the end milling process made from aluminum. The comparison of estimated control charts from variable helix tools is more comprehensive than regular helix tools.
The influence of pulse-on time and pulse-off time to hardness of aluminum 7075 processed by electrical discharge machining Ma'arif, Moch. Syamsul; Firdaus, Abu Rizal; Bintarto, Redi; Aisyah, Iis Siti
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/ydapnm85

Abstract

This study search at the the hardness of 7075 Aluminum alloy processed in EDM machining by varying pulse-on time and pulse-off time. This study uses an Electrical Discharge Machining (EDM) of C-TEK ZNC 320 Series and the specimens is tested for hardness by a Rockwell Hardness Tester. The material used is Aluminum 7075. EDM is chosen as because it does not require deformation force to perform machining process and suitable for machining of materials that are elastic, easy to form and have high thermal conductivity such as aluminum 7075. The electrode used is copper (Cu) with a diameter of 25.4 mm and a length of 50 mm. The process parameters used are pulse-on time: 50 μs, 75 μs, 100 μs and pulse-off time: 4 μs, 6 μs, 9 μs. The data are consisted of 9 specimens (cells). The results of the average hardness measurements from experiments 1 and 9 are: 28.03 HBR, and 50.80 HBR. Analysis of variance (Anova) shows the calculated F value is 71.55, the
Co-Authors Firdaus, Abu Rizal Iis Siti Aisyah Juliano, Hans Pratikto Pratikto Redi Bintarto, Redi Sonief, Achmad As’ad