Einführung in die Diamantdrahtschneidetechnik
Diamond wire cutting technology is used to separate or shape jadeite and other valuable gemstones when the project requires a narrow cutting path, low cutting force and controlled material loss. The process uses diamond abrasive fixed to a continuous wire loop. The moving wire removes material progressively instead of striking the stone with a rigid tooth.
Jadeite is not uniform. Natural cracks, inclusions, grain boundaries and changes in hardness can alter the result even when the machine settings remain unchanged. A useful cutting plan therefore begins with the actual stone, the intended cut line and the acceptance criteria, not with a universal speed or feed value. For a broader equipment overview, see the gemstone cutting machine guide.
How the Continuous Wire Process Works
A closed diamond wire loop travels around guide wheels and through the workpiece. The diamond coating performs the cutting while wire tension, guide alignment, feed force and debris removal keep the cutting path stable. Because the loop moves continuously in one direction, there is no programmed reversal at the end of a reciprocating stroke.
The cutting result is produced by the complete system: machine rigidity, wire condition, guide-wheel alignment, fixture support, coolant or cleaning method, and the internal condition of the gemstone. The process can reduce edge impact and kerf compared with some conventional methods, but the actual benefit must be confirmed by a representative sample cut.
Material and Process Differences
| Material oder Zustand | Main cutting risk | Direction to confirm |
|---|---|---|
| Jadeite with visible fissures | Crack extension near the entry, exit or unsupported area | Orient the cut after inspection and support both sides of the planned separation |
| Fine, valuable jadeite section | Excess kerf or insufficient allowance for finishing | Record actual kerf and protect the required finished dimensions |
| Opal or laminated gemstone | Local chipping, delamination or sensitivity to the chosen fluid | Confirm material construction, fluid compatibility and fixture pressure by sample cutting |
| Irregular rough stone | Unstable clamping and a changing wire engagement length | Use geometry-matched support and define the entry and exit points before cutting |
Fixture, Wire and Surface Control
Fixture and Cut Path
The fixture should restrain the stone without concentrating force on a weak corner or natural fissure. For an irregular workpiece, conforming support may be more important than higher clamping force. The operator should also identify where the wire enters and leaves the material, because the final breakthrough area is often the most vulnerable to edge damage.
Wire, Tension and Feed
Wire selection should match the material, required kerf, cut depth and surface target. Excessive feed can increase wire deflection or crack risk, while insufficient feed may extend the cycle and allow unnecessary rubbing. Tension, wire speed and feed should be adjusted as a coordinated set and recorded during sample testing.
Cooling and Cleanliness
Where fluid is permitted, it can help remove debris and stabilize the cutting zone. The selected fluid must be compatible with the gemstone, any composite backing and the downstream cleaning process. If a dry or restricted-fluid process is required, the wire condition and debris path need separate evaluation.
Gemstone Cutting Video
The following video shows precision gemstone cutting with a circular diamond wire. It is a process example rather than a fixed parameter recommendation; settings should be confirmed on the customer’s material and geometry.
SG15 for Gemstone Workpieces
Die SG15 precision CNC wire cutting machine is a relevant model for evaluating small gemstone and precision-part applications. Machine capacity, fixture arrangement, suitable diamond wire and the achievable result must be checked against the drawing and sample material. This article does not assign one parameter set to all jadeite or opal workpieces.
What to Record in a Sample Cut
- Stone type, visible fissures, inclusions and cut orientation.
- Workpiece dimensions, support points and entry and exit locations.
- Diamond wire identification and condition before and after the test.
- Actual kerf, dimensional deviation and material allowance.
- Edge chipping, crack extension and surface pattern through the full section.
- Cycle time, interruptions, accepted yield and downstream finishing required.
Häufig gestellte Fragen
Can one setting be used for every jadeite stone?
No. Internal cracks, dimensions, support, cut depth and the required surface can change the appropriate wire and operating window.
Does diamond wire cutting remove the need for polishing?
Not necessarily. The process can perform separation or rough shaping, while visible or precision surfaces may still require grinding, lapping or polishing.
What information is needed before a gemstone cutting test?
Provide the material name, photographs, dimensions, planned cut line, quantity, quality limits, fluid restrictions and any required finishing allowance.
Abschluss
Diamond wire cutting technology can support controlled jadeite and gemstone cutting when the wire, machine, fixture and process conditions are matched to the actual stone. The most reliable selection method is to inspect the material, define measurable acceptance criteria and compare the result of a representative sample cut.
