Professor of conventional and CNC machining.
SENAI - Nova Friburgo - RJ - Brazil
MY PROFESSIONAL EXPERIENCE
8/4/20254 min read
Overview
As a CNC and Conventional Machining Instructor at SENAI, I was responsible for training students in both traditional machining techniques and computer numerical control (CNC) programming and operation.
My work combined didactic planning, hands-on training, and applied technical instruction, ensuring students developed the competencies required for industrial machining environments.
Didactic Planning and Classroom Management
Prepared detailed lesson plans aligned with SENAI’s curriculum, defining objectives, methodologies, and evaluation criteria.
Developed teaching materials, technical drawings, process sheets, and practical exercises to support theoretical and hands-on learning.
Organized progressive learning paths that integrated technical reasoning with supervised practice.
Applied active teaching methodologies focused on practical skill development and problem-solving.
Technical and Theoretical Fundamentals
Taught Mechanical Technical Drawing, including interpretation of views, sections, and tolerances (ISO 2768, ISO 1101).
Instructed in Metrology and Dimensional Control, using precision tools like micrometers, dial indicators, bore gauges, and profile projectors.
Covered calculations for cutting speed, feed rate, and depth of cut for various materials and tooling types.
Introduced metallic materials, heat treatment, and mechanical properties.
Promoted workplace safety, 5S methodology, and compliance with machining safety standards.
Conventional Machining Practices
a) Conventional Turning
Set up and operated engine lathes for roughing, threading, facing, boring, and taper turning.
Guided students in inspection techniques and dimensional control of turned components.
b) Conventional Milling
Trained students on universal milling machines, performing slotting, keyway cutting, and gear milling.
Demonstrated correct tool selection, workholding, and alignment methods.
c) Surface and Cylindrical Grinding
Taught the fundamentals of fine finishing and dimensional precision.
Conducted wheel balancing, dressing, and fixture setup demonstrations.
d) Tool Sharpening
Instructed sharpening and reconditioning of drills, lathe tools, and milling cutters, emphasizing cutting geometry principles.
e) Bench Work and Fitting
Developed manual dexterity through filing, drilling, tapping, countersinking, and assembly exercises.
Explained fit types (interference, clearance, and sliding) and their practical applications.
CNC Machining
Introduce principles of automation, Cartesian coordinates, and reference systems.
Teach CNC programming in ISO code (G and M codes) for lathes and machining centers.
Perform CNC setup procedures, including workpiece and tool zeroing.
Demonstrate program simulation, trajectory correction, and safe machine operation.
Develop integrative projects covering the full production cycle: design → programming → machining → measurement → technical report.
Conventional Machining Practices
a) Conventional Turning
Set up and operated engine lathes for roughing, threading, facing, boring, and taper turning.
Guided students in inspection techniques and dimensional control of turned components.
b) Conventional Milling
Trained students on universal milling machines, performing slotting, keyway cutting, and gear milling.
Demonstrated correct tool selection, workholding, and alignment methods.
c) Surface and Cylindrical Grinding
Taught the fundamentals of fine finishing and dimensional precision.
Conducted wheel balancing, dressing, and fixture setup demonstrations.
d) Tool Sharpening
Instructed sharpening and reconditioning of drills, lathe tools, and milling cutters, emphasizing cutting geometry principles.
e) Bench Work and Fitting
Developed manual dexterity through filing, drilling, tapping, countersinking, and assembly exercises.
Explained fit types (interference, clearance, and sliding) and their practical applications.
Assessment and Professional Development
Evaluate students’ technical and behavioral performance in both theoretical and practical activities.
Monitor and document individual and group progress, providing constructive feedback.
Promote professional attitudes such as punctuality, organization, teamwork, and equipment care.
Participate in pedagogical meetings and continuous improvement initiatives for the course.
