Custom metal prototypes with a clear test purpose
Jucheng provides metal rapid prototyping for design development and assembly review. Before selecting a manufacturing route, state what the prototype must demonstrate: shape, mating fit, motion, thermal behavior or a defined mechanical test. Those purposes do not necessarily require the same material condition, finish or inspection scope.
When CNC machining is a practical route
CNC machining removes material from stock to create the specified part. It can suit prototypes with accessible pockets, holes, mating faces and turned features. Specify the alloy and stock condition when the test depends on material behavior. A prototype cut from a billet does not automatically reproduce a future casting, forging or printed part.
Tool access, internal corner radii, workholding and stock availability still matter. There are size and geometry limits to review; CNC prototyping is not an unlimited-size process. Heat treatment, deburring, coatings and inspection may be needed even when the starting material is already in the requested grade.
When the geometry calls for another route
Closed internal passages and lattice features can make machining from solid stock impractical. Submit those features for a route review rather than assuming they can be milled. Metal additive processes have their own requirements for supports, powder removal, orientation, heat treatment and finishing.
DMLS is a laser powder-bed fusion process that melts metal powder layer by layer. The names DMLS and SLM should not be used as a simple distinction between partly sintered and fully melted parts. For functional testing, confirm the selected process, alloy, orientation and post-processing rather than assuming printed properties match wrought stock.
Choose acceptance criteria for the test
- Assembly fit: identify mating dimensions, locating datums, thread requirements and coating allowance.
- Functional testing: state material condition, applied loads or temperatures, and any records required by your test plan.
- Appearance review: identify visible surfaces, edge treatment and the intended finish sample.
- Design iteration: label the revision and identify features that may change after the first trial.
Decide whether dimensions must be accepted before or after final finishing. If the prototype uses a substitute material or a different route from production, record that difference when interpreting test results. A successful fit check is not proof of fatigue life or approval for an end-use application.
What to include in your prototype RFQ
Send the controlled drawing and CAD model, alloy and condition, test purpose, quantity, critical features, finish, inspection records and delivery destination. Tell us which features are essential and which can change for manufacturability. We confirm the feasible route and project quotation. Price and delivery depend on the agreed scope and material availability; the page does not promise a fixed price or universal turnaround.