Przewodnik projektowania obróbki CNC
CNC Machining Design Guide for Custom Parts
Review practical DFM points for CNC machined parts before quotation, including tolerance planning, wall thickness, hole design, thread features, wybór materiału, surface finish impact, i wymagania dotyczące inspekcji.
Design review before machining
What This CNC Design Guide Helps You Prepare
A clear drawing and manufacturable design help reduce quotation uncertainty, machining risk, inspection questions, and lead time delays. JADE-CNC reviews part geometry, klasa materiału, wymiary krytyczne, tolerance zones, wykończenie powierzchni, thread callouts, hole depths, datum references, and inspection requirements before production planning.
This guide does not replace project-specific engineering review. It helps sourcing teams and engineers prepare the information JADE-CNC commonly checks during RFQ and DFM review for custom CNC machined parts.
DFM review note
For faster quotation, provide STEP / IGES / X_T files plus 2D PDF drawings when tolerances, wątki, GD&T, chropowatość powierzchni, wymagania dotyczące wykończenia, or inspection records are important.
Core manufacturability checks
Key Design Areas JADE-CNC Reviews
Identify critical dimensions, functional fits, datum references, and inspection points instead of applying tight tolerances to every feature.
Review thin walls, tall ribs, deep pockets, and material behavior to reduce vibration, distortion, and machining marks.
Plan corner radii according to tool access, pocket depth, tworzywo, and finish expectations.
Confirm hole depth, głębokość gwintu, blind-hole clearance, countersinks, counterbores, and gauge requirements.
Match aluminum, stal nierdzewna, miedź, mosiądz, tytan, ZERKAĆ, or engineering plastics with strength, finish, and machining needs.
Review Ra value, kosmetyczne twarze, grubość powłoki, obszary maskowania, and after-finish dimensions before machining begins.
Reference planning table
CNC Design Factors That Affect Quote and Production Review
| Design Factor | What JADE-CNC Checks | Why It Matters | Helpful RFQ Detail |
|---|---|---|---|
| Critical Tolerances | Functional dimensions, kojarzące się twarze, hole position, płaskość, prostopadłość, and GD&T callouts. | Controls inspection scope, machining setup, koszt, and risk. | Mark only dimensions that require close control and explain fit or assembly function. |
| Minimum Wall Thickness | Cienkie ściany, deep pockets, tall features, material stiffness, and clamping stability. | Thin features may deform, vibrate, or show visible tool marks. | Identify flexible walls and surfaces where appearance or flatness is important. |
| Internal Radius | Głębokość kieszeni, cutter access, required corner radius, and whether sharp internal corners are functional. | Tool diameter determines realistic internal corner geometry. | Confirm if a radius is acceptable or if EDM / special processing is required. |
| Hole and Thread Features | Blind hole depth, tap depth, thread standard, countersink angle, counterbore diameter, and plug gauge needs. | Incorrect callouts can delay machining, kontrola, or assembly. | Provide thread standard, depth, klasa tolerancji, and whether full thread depth is critical. |
| Surface Roughness | Cel Ra, machined surface marks, widoczne twarze, powierzchnie uszczelniające, and functional contact surfaces. | Roughness affects finish method, kontrola, toolpath, and cycle time. | Specify roughness only where it is needed and separate cosmetic from functional surfaces. |
| Post-Machining Finish | Anodowanie, pasywacja, platerowanie, malarstwo, piaskowanie perełek, polerowanie, grubość powłoki, and masking areas. | Finishing can affect dimensions, wygląd, przewodność, and assembly fit. | State finish name, kolor, coating thickness if controlled, and surfaces to protect. |
RFQ to delivery workflow
How JADE-CNC Reviews a CNC Machined Part
File Review
Check 3D model, 2Rysunek D, tworzywo, notatki dotyczące tolerancji, wymagania dotyczące wykończenia, and inspection expectations.
DFM Feedback
Identify machining risk, tool access, thin features, wymiary krytyczne, material concerns, and finish impact.
Machining Plan
Arrange CNC milling, obrócenie, 5-axis machining, setup sequence, workholding, and in-process inspection points.
Inspection and Delivery
Confirm dimensional report, Raport CMM, FAI-style record, finish review, packaging, and shipment readiness when required.
Drawing checklist
Information That Helps Faster CNC Quote Review
KROK, IGES, X_T, and 2D PDF drawings with revision level and clearly marked critical features.
Stopień materiału, acceptable equivalent, obróbka cieplna, twardość, certification needs, and blank condition if relevant.
Prototype quantity, low-volume batch quantity, repeat-order expectation, and target delivery date.
Wymiary krytyczne, datum references, GD&T, hole position, współpracujące powierzchnie, and inspection method.
Chropowatość powierzchni, anodowanie, pasywacja, polerowanie, piaskowanie perełek, malarstwo, maskowanie, and color needs.
Assembly use, load, ciepło, korozja, nosić , opieczętowanie, wygląd, electrical contact, or packaging needs.
Need DFM Review Before CNC Machining?
Wyślij pliki CAD, 2Rysunki D, klasa materiału, notatki dotyczące tolerancji, wymagania dotyczące wykończenia, i ilość. JADE-CNC will review manufacturability before quotation and machining planning.
What JADE-CNC Checks Before CNC Machining Design Approval
A CNC part drawing should clearly show which features control fit, function, wygląd, and inspection. JADE-CNC reviews these design points together so the machining route, setup plan, finishing process, and inspection scope can support the intended part use.
Part Geometry
Pockets, ribs, szczeliny, bosses, podcięcia, internal corners, and tool access directions are reviewed to identify machining limits and setup needs.
Tolerance and Datums
Wymiary krytyczne, kojarzące się twarze, datum references, płaskość, hole position, and GD&T notes are checked so inspection focuses on functional features.
Wall Thickness and Pocket Depth
Cienkie ściany, deep cavities, tall ribs, and unsupported features are reviewed for vibration, odkształcenie, tool reach, and surface mark risk.
Holes and Threads
Ślepe otwory, tapped holes, counterbores, countersinks, głębokość gwintu, clearance, and gauge requirements are checked for machining and assembly fit.
Finish and Inspection
Chropowatość powierzchni, kosmetyczne twarze, grubość powłoki, obszary maskowania, and dimensional checks after finishing are reviewed against the drawing requirement.
Często zadawane pytania
DFM for CNC machining means reviewing a part design for manufacturability before machining. It checks whether geometry, tworzywo, tolerancja, wall thickness, dziury, wątki, wykończenie powierzchni, and inspection requirements can be produced reliably.
A 3D CAD file defines geometry, but a 2D drawing can show tolerances, GD&T, wymiary krytyczne, wątki, chropowatość powierzchni, wymagania dotyczące wykończenia, notatki merytoryczne, and inspection expectations.
Critical tolerances should be applied to mating faces, pozycje otworów, powierzchnie uszczelniające, bearing fits, thread features, datum references, and dimensions that affect assembly or function.
Tak. Tight tolerances may require slower machining, additional setups, controlled inspection, special tooling, or more process checks. Use tight tolerances only where function requires them.
There is no single wall thickness for every material or part. Thin walls should be reviewed based on material stiffness, part size, pocket depth, setup method, and flatness or appearance requirements.
Internal corners should allow enough radius for cutter access. Sharp internal corners may require EDM or special processing if they are functionally necessary.
Useful details include hole depth, thread standard, głębokość gwintu, klasa tolerancji, countersink or counterbore size, blind-hole clearance, and whether full thread depth is required.
Surface finish can affect dimensions, grubość powłoki, maskowanie, wygląd, odporność na korozję, przewodność, and sealing surfaces. Functional and cosmetic surfaces should be marked separately.
Tak. JADE-CNC can review CAD files and drawings to identify tool access limits, thin-wall risk, tolerance concerns, finish impact, potrzeby inspekcji, and unclear drawing requirements.
Send STEP, IGES, or X_T files, 2D PDF drawings, klasa materiału, ilość, notatki dotyczące tolerancji, surface finish requirements, potrzeby inspekcji, and any assembly or application context.