Tegar R.

Oversaw the preparation, arrangement, and proportional weighing of raw materials including FC 250, FCD 450, and Alloy Steel 4340 for furnace loading in five operational cycles of smelting, each with a maximum capacity of 2 tons. Conducted in-depth analysis of molten metal samples using spectrometry to validate chemical composition and reduce structural failures, ensuring fewer than 1-3 minor product defects. Executed precision lathe machining on three FC 250 cylinders in accordance with specified geometric tolerances. Managed the adjustment of mechanical properties for seven railway wheel components, totaling 3 tons, through heat treatment procedures, including temperature monitoring every 10 minutes up to 750°C. Led the finishing stage for 30 manhole units to guarantee surface smoothness, visual quality, and dimensional accuracy. Operated sandblasting machinery 1-5 times daily to remove oxidation scale, residual sand casting, and contaminants from various cast product lines. Designed and produced 50 gating channels with precise system calculations to maintain stable flow during casting operations. Measured the physical dimensions of three workpiece samples for 3D CAD modeling, material property determination, and casting volume estimation.

Developed 3D CAD models for fork component geometry based on previous design optimizations to enhance shape efficiency and structural strength. Executed finite element analysis (FEA/CAE) simulations with a team of four to identify critical points for stress distribution, deformation limits, and mechanical load resistance. Produced a physical prototype via rapid prototyping using PLA filament for physical validation assessments before entering production patterns. Designed and assembled a high-precision wooden pattern as the primary mold for sand casting processes. Calculated thermal shrinkage allowances of approximately ±1.3% for wooden patterns to account for metal volume reduction during solidification, ensuring precision in final product dimensions. Evaluated sand casting performance through staged aluminum pouring trials, achieving a reduction in product defects from 15% to 4%. Conducted manual surface finishing to refine the texture of aluminum cast products.

Managed the preparation, cutting, and smoothing of steel profile raw materials (angle iron, hollow steel, and plates) producing 5-20 units daily per technical drawing specifications. Executed metal structure assembly and fabrication using shielded metal arc welding (SMAW) techniques to manufacture 2-4 units of construction products daily, including fences, trellises, gates, and canopies. Conducted surface finishing through precision putty application to even out material surfaces and conceal welding joint defects. Applied protective coating techniques on 1-2 units to enhance visual aesthetics and prevent corrosion from weather elements. Oversaw the workflow in daily production operations, ensuring smooth material preparation and final assembly processes to prevent delays. Coordinated task distribution and workflow timelines with the team to ensure all order delivery targets were met on schedule.