CNC Machining for Castings and Metal Components
Relia can CNC-finish its own castings or review blanks you supply. We connect available stock, stable locating references and tool access to the bores, faces, threads and fixing patterns on your drawing. The quotation separates the incoming blank from the finished component and identifies which operations remain with your workshop.
Define your CNC machining requirement
- StartKnown material, blank condition and stock.
- LocateStable supports and functional references.
- FinishThe contacts accepted on the delivered component.
The Assembly Reference Leads the CNC Plan
Relia uses the controlled drawing and PDF/CAD or IGES/STEP inputs to connect feature access, material condition and the required fit. The catalogue’s CNC service identifies drilling, milling and turning as project operations. Their names do not set a universal tolerance or machine setup; the actual component determines how many operations, references and checks are needed.
- Part definitionDrawing, model, material and supplied scope.
- Functional datumsThe faces and axes that locate the part in use.
- Operation planCuts and setups serving those relationships.
The Incoming Blank Must Contain the Finished Part
A casting may be within its outside envelope while lacking cleanup stock around an offset bore or face. Review the blank and finished models together, including local stock and areas suitable for locating. For customer-supplied castings, agree the incoming condition and what happens if the required finished geometry cannot be achieved from a particular blank.
- Incoming stateMaterial, treatment and blank geometry.
- Local allowanceStock at every relevant finished surface.
- FeasibilityThe finished part reachable from that blank.
The First Setup Creates a Useful Reference
An irregular casting needs stable support before a trustworthy datum can be cut. Place supports so the cutting load does not bend a thin floor or wall, and keep clamps away from the tool path. Once a primary reference exists, the next setup should transfer the intended relationship instead of choosing an unrelated convenient surface.
Place stable contacts near cutting loads and keep clamps clear of the tool path.
Relate the next bore, face or fixing pattern to the intended assembly reference.
Tool Reach and Chip Exit Shape the Operation
On the carrier shown, the raised posts and central profile constrain the cutter and holder approach. Review tool overhang, stiffness and chip removal before assigning the finished surface requirement.
A ported body adds deep bores and intersecting holes approached from different directions. If drilling opens into another passage, include the new internal edge in the deburring and cleaning scope.
- ReachA practical cutter and holder approach.
- StabilitySupport and overhang suited to the cut.
- ExitChip removal and accessible internal burrs.
Size and Position Need Different Checks
On a carrier, the central bore, post positions and seating plane locate the mating mechanism together. Correct post diameters alone cannot establish their pitch or position. The drawing identifies the datum and the required relationship, while the inspection plan states a suitable setup and result. This keeps a numerical size tolerance from becoming an incomplete promise of assembly fit.
- SizeDiameter, depth or width.
- RelationshipPosition, orientation or runout from a datum.
- ResultThe requirement measured in the relevant state.
Finishing Order Preserves the Final Dimension
Thermal and surface operations can change shape, size or the condition of a working surface. Establish which cuts occur before or after them and which contacts need masking. A finished bore may require protection during packing even when the rough exterior can tolerate ordinary contact. Final inspection represents the version delivered to your workshop or assembly line.
- SequenceRough work, affecting operations and final cuts.
- BoundaryCoated, masked or protected working areas.
- ReleaseDimensions in the agreed delivered condition.
The Sample Resolves Setup and Interface Risks
Use the sample to confirm the difficult bore, related mounting face or deep-access feature rather than only the easiest outside dimensions. Relia can provide key dimensional records with characteristics and sampling agreed per order. Drawing and sample criteria are settled before the trial, and your sample approval provides the basis for arranging batch production.
- ReferenceThe released drawing and actual blank.
- TrialCritical cuts and useful dimensional results.
- RepeatApproved setup basis and controlled revisions.
Choose the Correct Casting and Machining Boundary
Use the full-component guide when the order includes blank making and CNC. Choose the customer-supplied-blank page for machining your own castings. Technical notes on first-operation pads, gauge correlation and edge breaks isolate specific issues that can otherwise be hidden inside a broad precision-machining description.
Contact the Casting Team
Send the finished drawing and model, starting material or blank, quantities and critical datums. Identify any supplied blanks and operations that remain with your workshop.
Qingdao Reliacasting Co., Ltd.
Drawing-based metal castings and CNC-finished OEM components from China.
Qingdao officeNo. 96 Shuyuan Road
Qingdao, Shandong, China
Arrange a project visit with us before travelling.
The released drawing, selected material and agreed order define the supplied component and required acceptance evidence.