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All Journal Nozel : Jurnal Pendididikan Teknik Mesin
Nyenyep Sriwardani, Nyenyep
Program Studi Pendidikan Teknik Mesin, FKIP, Universitas Negeri Surakarta

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PENGARUH VARIASI PENAMBAHAN KADAR AIR DENGAN BAHAN PENGIKAT BENTONIT TERHADAP KARAKTERISTIK PASIR CETAK DAN CACAT POROSITAS HASIL PENGECORAN LOGAM PADUAN Al-Si Saputra, Fajar Rizki; Harjanto, Budi; Sriwardani, Nyenyep
Nozel : Jurnal Pendididikan Teknik Mesin Vol 1, No 4 (2019)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v2i4.42460

Abstract

The purposes of this research was to learns (1) the effect of adding moisture content to the permeability of sand casting; (2) the effect of adding moisture content to the compressive strength of sand casting; and (3) the effect of adding moisture content to porosity defects in casting results. This research is conducted at Manufacturing Polytechnic, Ceper, Klaten. The method that used is pre-experimental design with design one-shot case study. The independent variable in this research are variations of moisture content of 4%, 6%, and 8%, with the dependent variable are permeability and compressive strength of sand casting, and porosity defect of Al-Si alloy cast. The permeability test by using permeability meter, compressive strength test by using universal strength machine¸ and porosity defect test of cast result on qualitative with visual observation and quantitative with calculation of porosity percentage.  The results of  the adding of moisture content  of 4%, 6%, and 8% in the sand casting showed that: (1) The higher the addition of water measure on sand casting decrease the permeability value. The highest permeability value in the addition of 4% water measure is 103.67 cm3/min, while the lowest in the addition of 8% water measure is 83.00 cm3/min; (2) The higher water content in the printed sand further decreases the value of its compressive strength. The lowest compressive strength value occurred at 8% water measure increase of 39.00 KN/m2, while the highest value of compressive strength was obtained at 4% water measure addition 47.56 KN/m2; (3) The higher water measure of sand casting will result in a higher percentage of porosity defects on the casting results. The lowest percentage of porosity defect was obtained by adding 4% water measure is 1.56% from total volume, while the highest was 8% water measure is 3.06% from total volume.
ANALISIS PEMBELAJARAN BERBASIS HOTS PADA PESERTA DIDIK KELAS XI TKR DI SMK NEGERI 2 SUKOHARJO Juliana, Erva Nhor; Suharno, Suharno; Sriwardani, Nyenyep
Nozel : Jurnal Pendididikan Teknik Mesin Vol 2, No 4 (2020)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v1i4.50853

Abstract

The objective from this research is to find Penelitian ini bertujuan untuk: (1) how the learning implementation design (RPP) made by TKR teachers at SMK Negeri 2 Sukoharjo that meets Higher Order Thinking Skills elements; (2) implementation of learning activities carried out by TKR teachers at SMK Negeri 2 Sukoharjo; (3) implementation of learning assessments made by TKR teachers at SMK Negeri 2 Sukoharjo which leads to elements of higher order thinking skills. This research is a mixed methods research. Data sources came from 98 students from TKR XI, Teachers of Smk Negeri 2 Sukoharjo. Data techniques include questionnaires, documentation and observation. This study uses data validity using sampling techniques and the Slovin formula. The research procedure consists of research methods, preparation of research instruments, data collection, data analysis, drawing conclusions. The conclusion is (1) The Learning Implementation design (RPP) made by TKR class XI teachers at SMK Negeri 2 Sukoharjo has damaged it to fulfill the elements of higher-order thinking skills; (2) The implementation of learning activities by TKR teachers at SMK Negeri 2 Sukoharjo has attempted to implement learning activities that lead to higher-order thinking skills; (3) The assessment or evaluation of learning made by TKR teachers at SMK Negeri 2 Sukoharjo has led to elements of measuring higher-order thinking skills.
PENGARUH UNSUR MAGNESIUM DAN HEAT TREATMENT PADA PERFORMA PISTON DARI VELG ALUMINIUM DENGAN ADC 12 Ulya, Amin Hakim Nur; Harjanto, Budi; Sriwardani, Nyenyep
Nozel : Jurnal Pendididikan Teknik Mesin Vol 2, No 2 (2020)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v2i1.43229

Abstract

Aluminum alloy is one of the non ferrous metals that are widely used in various fields of life including one of the automotive industry. In Indonesia, the automotive industry is currently experiencing rapid development, as indicated by the number of motorized vehicles.there are many aluminium scrap from velg those are not used intensively, so casting is done through the use of aluminium velg. To prevent damage to the piston and to approach the standard, its hardness needs to be increased, namely by adding magnesium by 0.3% and 0.6% as well as artificial aging heat treatment method at a temperature of 155 ˚C with a variation of holding time used are 2 hours and 4 hours. The original piston has a hardness value 87.5 VHN. It turns out that aluminum velg material has a chemical composition of silicon element (Si) of 12.9% which is not in accordance with the A333.0 standard, so it is necessary to add the ADC 12 in casting to make new piston material. Based on the A333.0 standard, the suitable composition is 75% ADC 12 + 25% aluminum velg with a hardness value is 83.2 VHN, but still below from the original piston hardness. After the addition of magnesium and artificial aging the hardness of the new piston material has increased. The hardness of the material is 75% ADC 12 + 25% aluminum velg which has a hardness over the original piston is a material with artificial aging 4 hours with a hardness value is 87.6 VHN, material with the addition of magnesium elements 0.3% and 0.6% as well as artificial aging 4 hours which had a violence value are 88.6 VHN and 90.2 VHN. The process of adding magnesium and artificial aging also affects the metallography of the material, namely the structure and shape of the microstructure becomes more organized and there is a change in grain size.
KUALITAS REPAIR WELDING MENGGUNAKAN METODE PENGELASAN TIG DENGAN PERLAKUAN PREHEATING DAN POST WELD HEAT TREATMENT PADA CAST WHEEL ALUMINIUM Siwi, Dewi Rima Ratri; Harjanto, Budi; Sriwardani, Nyenyep
Nozel : Jurnal Pendididikan Teknik Mesin Vol 1, No 3 (2019)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v2i3.42453

Abstract

The Purpose of this research are to know chemical composition, find micro structure, find impact strength, find speciment’s hardeness level on allumminium cast wheel before and after Tungsten Inert Gas welding. The speciment on this research is aluminum cast wheel or aluminum velg. The data analysis on this research is a comparative descriptive method, that the observation result is analyzed by description. And then compare the observation result between the data before TIG welding or before conducted preheating and PWHT. The parameter of analyze data are included: the testing of chemical composition, microstructure, hardness and impact. Based on the result of this research, it can be concluded that the cast wheel material is aluminum type cast alloy AA.445.2 which has non-heat treatable characteristic. The research results show that the microstructure of Al grain in the HAZ region fused with primary aluminum (α-Al) and grain Si alloy formed between the primary α-Al. The impact strength value on the welded speciment is higher than impact strength value before welding those are 0.0616 J/mm2 and 0.0384 J/mm2. Hardeness level on the speciment before welding processes is 103,381 VHN. The number is higher than after on the welding area, the hardeness level is lower too that is 44,051 VHN, whereas the hardeness level an the HAZ is a 37,943 VHN and 35,465 VHN on the base material.
ANALISIS PENGGUNAAN WORK PREPARATION SHEET DAN PERAN INSTRUKTUR TERHADAP KETRAMPILAN MEMBUAT ULIR SQUARE PADA MATA PELAJARAN PRAKTIK OPERASI MESIN BUBUT LANJUT SISWA SMK BHINEKA KARYA Wijaya, Rosandi Surya; Akhyar, Muhammad; Sriwardani, Nyenyep
Nozel : Jurnal Pendididikan Teknik Mesin Vol 1, No 1 (2019)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v1i2.32992

Abstract

The objectives of this study were: (1) correlation between Work Preparation Sheet (WPS) and threading skills in practicum on advanced machining practice subjects at Bhinneka Karya Surakarta Vocational School, (2) relationship between instructor role and threading skills in practical subjects of machining practice subjects continued at Bhinneka Karya Surakarta Vocational School, (3) relationship of WPS implementation between the instructor's role simultaneously and the skill of making square threads in practical subjects in advanced machining practice subjects at Bhinneka Karya Surakarta Vocational School. The population of this study was all students from class XI in the mechanical engineering program at Bhinneka Karya Surakarta Vocational High School. The Issac-Michael table of 84 students raised the sample size. The sample members are appointed using simple random sampling technique. This processing data uses IBM SPSS version 21.0 software. The results of this study indicate that the useful contribution given by the WPS variable to the skill of making square yarn is 43.9%, while variations in the role of the instructor create a valuable contribution of 12%. This shows that both variables contribute effectively to the skill of making square yarn by 55.9%, and there are 44.1% influenced by other factors not explained in this study. The implementation of WPS as a medium for practical learning and the instructor role as a facilitator's practice results in students' efficiency in turning machine practices into making square threads in terms of faster time processing and improved practice scores.
ANALISIS PENGARUH KONDISI LINGKUNGAN WORKSHOP KERJA BANGKU TERHADAP MOTIVASI BELAJAR MAHASISWA DI PROGRAM STUDI PENDIDIKAN TEKNIK MESIN FKIP UNIVERSITAS SEBELAS MARET Gusnadi, Aloisius Satriya; Sriwardani, Nyenyep
Nozel : Jurnal Pendididikan Teknik Mesin Vol 7, No 2 (2025)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v7i2.100667

Abstract

Improving the quality of vocational education, particularly in the field of engineering, is a strategic step in preparing graduates to be competitive in the industrial sector. One crucial factor that supports the learning process is a well-maintained workshop environment. This study aims to analyze the influence of workbench workshop environmental conditions on the learning motivation of students in the Mechanical Engineering Education Program at the Faculty of Teacher Training and Education, Universitas Sebelas Maret. This research employed a quantitative approach with an associative survey design. The sample consisted of 91 students selected through a total sampling technique. Data were collected using a closed-ended questionnaire with a Likert scale (1–4) and analyzed using regression analysis. The results show that the average score for the workshop environment was 41.12, while the average score for learning motivation was 56.80. The normality test indicated that the residual data for learning motivation were normally distributed (Asymp. Sig. = 0.074), and the linearity test confirmed a linear relationship between workshop environment and learning motivation (Sig. = 0.297). The regression test revealed that the workshop environment had a positive influence on student learning motivation. These findings suggest that a well-managed workshop environment can foster enthusiasm and student engagement in the learning process. 
PELAKSANAAN PRAKTIK KERJA INDUSTRI PADA PESERTA DIDIK KELAS XI DI SMK NEGERI 2 KARANGANYAR DENGAN MODEL KIRKPATRICK Sari, Ayu Nuvita; Akhyar, Muhammad; Sriwardani, Nyenyep
Nozel : Jurnal Pendididikan Teknik Mesin Vol 2, No 2 (2020)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v2i1.43231

Abstract

This study aims at: (1) obtaining a description the quality of implementation Internship Program Competency Ototronic Engineering class XI in SMK Negeri 2 Karanganyar in terms of the Reaction component; (2 obtaining a description the quality of implementation Internship Program Competency Ototronic Engineering class XI in SMK Negeri 2 Karanganyar in terms of the Learning component; (3) obtaining a description the quality of implementation Internship Program Competency Ototronic Engineering class XI in SMK Negeri 2 Karanganyar in terms of the Behavior component.This research was conducted at SMK Negeri 2 Karanganyar. This study was included in the type of evaluative research (evaluation research) where the evaluation model used was Kirkpatrick's evaluation model. The population in the study were students of SMK Negeri 2 Karanganyar at the Ototronic Engineering Expertise Program and the supervisor of the school in the ototronic engineering expertise program and supervisors in the industry who directly assisted the implementation of industrial work practices. The number of respondents was 108 students, 5 mentors for the ototronic engineering expertise program, and 5 mentors in the industry. Data collection techniques in this study used a questionnaire method that was distributed to students, an interview method with some student respondents, and all school supervisors and industry teachers, and documentation of the final score of Internship. Validity uses fact finding, namely the validity of logic. Therefore, fact finding for reliability testing is not necessary. Score analysis uses average analysis which will be assessed based on research criteria. The results of the study show: (1) aspects of reaction with student respondents who have an average value of 3.88 which includes very high criteria, this is indicated by the results on the indicators giving direction of 3.99; (2) aspects of evaluating learning with student respondents who have an average value of 3.82 which includes very high criteria, this is intended with the results on the discipline indicator of 4.00; (3) aspects of behavior evaluation with student respondents who have an average value of 4.07 which includes very high criteria, this is indicated by the results on the skills indicator after the internship is 4.25; (4) from the results of research conducted to obtaining a comprehensive picture when viewed from the components of reaction, learning, and behavior is very high including very high criteria.
EVALUASI PROGRAM KERJASAMA KOMPETENSI KEAHLIAN TEKNIK SEPEDA MOTOR DENGAN HONDA DI SMK MUHAMMADIYAH 1 SURAKARTA DENGAN MENGGUNAKAN MODEL CIPP Iswanda, Iswanda; Estriyanto, Yuyun; Sriwardani, Nyenyep
Nozel : Jurnal Pendididikan Teknik Mesin Vol 2, No 3 (2020)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v2i2.43245

Abstract

The purpose of this study is determine the collaboration of motorcycle engineering expertise competencies with Honda viewed from (1) aspects of the context which include; (a) the background of the cooperation program, (b) purpose, (c) objectives, and (d) relevance; (2) input aspects which include (a) curriculum, (b) HR, (c) financing, (d) facilities and infrastructure, (e) competency evaluation; (3) aspects of the process that includes; (a) learning programs,(b) apprenticeship, (c) teacher training, and (d) problems in the field; (4) product aspects which include; (a) opportunity to enter the workforce, (b) graduate competencies, (c) conformity to expectations.This study was used a evaluation method of the CIPP model (Context, Input, Process, and Product). The data sources came from 9 graduate of the TSM Honda Department students, the Head of the TSM Honda Department Program, the Head of the BKK, the TSM-Honda program development coordinator, and 13 Heads of AHASS workshops. The validation of the questionnaire items was used logical validity. The data analysis technique was uses description supported by the average analysis based on the assesment criteria.The results show that: (1) aspects of the context which consisted of four indicators, namely the background of the TSM-Honda program collaboration, purpose, objectives and relevance of the program had all been in conformity and there had been an MOU between the school and Honda. (2) input aspects have been carried out in accordance with agreed procedures; (a) the process of making curriculum involves both parties, (b) preparation of human resources for training, (c) financing of facilities and infrastructure and (d) preparation of facilities and infrastructure conducted by schools, and (e) evaluating student competencies. (3) aspects of the process have been carried out by each party well and in accordance with procedures. Which consists of (a) practice-based learning programs, (b) apprenticeship students in AHASS workshops, (c) teacher training and certification and (d) field problem can be solve. (4) aspects of the product consist of (a) opportunitiy to enter the workforce still needs to be improved (b) the application of competence is 72% and job satisfaction which reaches 77.8% shows a good scale. (c) graduated satisfaction after studying at TSM Honda shows a good scale at 80%.The purpose of this study is determine the collaboration of motorcycle engineering expertise competencies with Honda viewed from (1) aspects of the context which include; (a) the background of the cooperation program, (b) purpose, (c) objectives, and (d) relevance; (2) input aspects which include (a) curriculum, (b) HR, (c) financing, (d) facilities and infrastructure, (e) competency evaluation; (3) aspects of the process that includes; (a) learning programs,(b) apprenticeship, (c) teacher training, and (d) problems in the field; (4) product aspects which include; (a) opportunity to enter the workforce, (b) graduate competencies, (c) conformity to expectations.This study was used a evaluation method of the CIPP model (Context, Input, Process, and Product). The data sources came from 9 graduate of the TSM Honda Department students, the Head of the TSM Honda Department Program, the Head of the BKK, the TSM-Honda program development coordinator, and 13 Heads of AHASS workshops. The validation of the questionnaire items was used logical validity. The data analysis technique was uses description supported by the average analysis based on the assesment criteria.The results show that: (1) aspects of the context which consisted of four indicators, namely the background of the TSM-Honda program collaboration, purpose, objectives and relevance of the program had all been in conformity and there had been an MOU between the school and Honda. (2) input aspects have been carried out in accordance with agreed procedures; (a) the process of making curriculum involves both parties, (b) preparation of human resources for training, (c) financing of facilities and infrastructure and (d) preparation of facilities and infrastructure conducted by schools, and (e) evaluating student competencies. (3) aspects of the process have been carried out by each party well and in accordance with procedures. Which consists of (a) practice-based learning programs, (b) apprenticeship students in AHASS workshops, (c) teacher training and certification and (d) field problem can be solve. (4) aspects of the product consist of (a) opportunitiy to enter the workforce still needs to be improved (b) the application of competence is 72% and job satisfaction which reaches 77.8% shows a good scale. (c) graduated satisfaction after studying at TSM Honda shows a good scale at 80%.
Co-Authors Budi Harjanto Gusnadi, Aloisius Satriya Iswanda, Iswanda Juliana, Erva Nhor Muhammad Akhyar Saputra, Fajar Rizki Sari, Ayu Nuvita Siwi, Dewi Rima Ratri Suharno Suharno Ulya, Amin Hakim Nur Wijaya, Rosandi Surya Yuyun Estriyanto