Jinhua Machinery undertakes CNC machining after aluminum die casting. Plan the finishing work around the actual blank, the released component drawing, and the bores, mating faces, threads, and sealing faces needed for assembly.
A die-cast blank provides near-net geometry; selected interfaces may still need CNC finishing. Define which surfaces remain as cast and which must be machined. Confirm the material designation, drawing revision, blank condition, and responsibility for supplying and accepting the blank before agreeing a machining scope.
Draft, parting line mismatch, flash, and variation in cast geometry can affect locating surfaces, tool access, and available stock. Machining allowance should be assessed at each critical feature, not assumed from the nominal model alone.
Too little stock can prevent a complete cleanup; removing more material than necessary can expose internal porosity or reduce support around thin walls. Blank acceptance and any required trial-part review should be agreed before production planning.
Send DetailsAn as-cast surface is not automatically a suitable finished machining datum. Review locating points, clamp support, and the first machined references together. The process considerations below guide drawing review; the final route and acceptance requirements remain component-specific.
For a broader range of casting routes and materials, see machined casting component support. For the wider process family, see drawing-based CNC machining.
Workholding should account for uneven cast surfaces, local stiffness, and access to the cut. Thin walls need support near the cutting load; excessive clamp force can cause deformation and misleading in-fixture measurements.
When features require multiple setups, define how a machined face, bore, or locating feature transfers the reference between operations. Review relationships between holes and faces after reclamping rather than assuming one setup finishes every feature.
Review milling for mating and sealing faces, boring or other finishing operations for specified holes, and drilling and tapping for threads. Turning may suit rotational features where geometry and workholding permit. Tool access, burr control, and chip removal belong in the route review.
Identify critical characteristics from the customer drawing: bore size, face relationships, thread requirements, and surface finish. Agree measurement references, part condition, sampling, and report format. Porosity or leak-tightness requirements need their own acceptance criteria and separately confirmed test scope.
The confirmed service on this page is CNC machining after aluminum die casting. It does not establish an in-house die casting service. Blank origin, casting responsibility, and acceptance arrangements are confirmed for each RFQ; no customer-supplied or purchased-blank arrangement is assumed.
Send both when available, including the current revision and model. The casting information establishes stock and locating conditions; the finished-part drawing defines the interfaces to machine and inspect. If either is unavailable, identify the gap before a route is agreed.
Only if its specified condition and acceptance criteria suit the application. A cast-in hole may need subsequent finishing where the drawing requires a controlled size, finish, or relationship to other features. The drawing, not the presence of a hole in the blank, determines the requirement.
Identify the surfaces requiring cleanup and compare their finished geometry with the permitted blank variation. Include parting line effects and the proposed locating scheme. A single universal stock allowance is not a substitute for a feature-by-feature review.
Define permissible surface and internal conditions with the customer before machining. Removing stock can reveal porosity that was not visible on the blank. Any leak test, special examination, or remedial treatment must be separately specified and confirmed; machining alone does not guarantee pressure tightness.
Consider local support, clamp loading, cutting access, and the order of stock removal. Where another setup is needed, plan datum transfer and verification of the finished relationships. This is route planning, not a claim that every feature can be completed in one clamping.
Provide material designation, confirmed blank process and condition, order quantity, machined-feature requirements, tolerances, finish, and inspection or sealing criteria. Explain the assembly function and any supply-responsibility constraints. Send drawings as email attachments after sharing project requirements through the Contact form.
Use the Contact form to send project requirements; send drawings as email attachments. Include the aluminum grade, blank drawing or model, finished-part revision, quantity, machining features, and agreed technical requirements.
