CNC machining workshop

Case Studies / Projects

How to Turn Thin-Wall Aluminum Hemispherical Shells

Published: August 22, 2026

Thin-wall aluminum hemispherical shells have low rigidity and are easily deformed during CNC turning. Direct gripping or pressing leaves the shell unsupported, weakens the overall process system, encourages tool spring-back, and makes wall thickness and surface roughness difficult to control. The correct approach is a dedicated fixture that conforms to the outer profile and supports the shell while it is clamped. This comparison explains why the fixture improves rigidity and provides more consistent dimensional and surface-quality results. It is a focused reference for fixture planning before internal and external profile turning.

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How to Turn Epoxy Parts: Tool Selection and Cautions

Published: August 21, 2026

Glass-fiber epoxy composites abrade cutting edges, dissipate heat poorly, and can delaminate, chip, or generate heavy dust during turning. Tool geometry controls cutting behavior, while tool material strongly affects life. This guide compares suitable carbide grades and polycrystalline diamond with high-speed steels and a coated-carbide grade that are less suitable for demanding finishes. It also explains how wear resistance, hardness, coating interaction with glass fibers, sharpness, cooling, and cutting parameters affect quality, cost, and productivity. The recommendations support stable turning and grinding-replacement strategies for demanding epoxy components.

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How to Machine High-Strength Aluminum Alloys

Published: August 21, 2026

High-strength 2xxx and 7xxx aluminum alloys combine low density with demanding machining behavior: thermal distortion, adhesion, built-up edge, work hardening, cutting heat, and rapid tool wear. This guide covers carbide and DLC tool choices, rake, clearance and inclination angles, wear limits, high-speed cutting, feed selection, cooling, and aging treatments. Tables provide rapid-milling, end-milling, ball-nose, and 7055 example parameters while preserving the source's tool grades, diameters, speeds, feeds, and depths of cut. Two unusual source values remain visible and are flagged for verification rather than silently corrected.

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CNC Machining vs. 3D Printing for Rapid Prototyping

Published: July 13, 2026

Rapid prototype development uses different processes for non-metallic and metal parts, depending on part geometry, function, material, and validation needs. This article explains the typical CNC process route for prototypes, including high-speed milling and engraving for large plastic and acrylic parts. It compares CNC machining with 3D printing, laser powder-bed fusion, and soft-tool stamping, and highlights practical considerations such as one-piece machining, fixture design, tapping, bonding, post-processing, lead time, material use, and assembly validation. The comparison helps teams select a practical process for each validation stage.

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Crankshaft Machining Process Planning: Principles and Datum Selection

Published: July 13, 2026

Crankshaft process planning must balance machining quality, production efficiency, cost, and delivery requirements. This article explains how to establish precision datums early, separate roughing from finishing, sequence surfaces and holes, arrange heat treatment, and control deformation in slender crankshafts. It compares turning, internal milling, turn-broaching, and combined processes for rough machining, then reviews grinding-sequence tradeoffs and quality risks. The guide also details radial, axial, and angular datum selection for a 4H engine crankshaft, including practical rough and precision locating strategies.

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