Influence of coolant on ductile mode processing of binderless nanocrystalline tungsten carbide through ultraprecision diamond turning

2015 ◽  
Author(s):  
Marius Doetz ◽  
Olaf Dambon ◽  
Fritz Klocke ◽  
Oliver Fähnle
Keyword(s):  
Tungsten Carbide ◽  
Diamond Turning ◽  
Ductile Mode

Ductile mode single point diamond turning (SPDT) of binderless tungsten carbide molds

2018 ◽  
Author(s):  
Oliver W. Fähnle ◽  
Marius Doetz ◽  
Olaf Dambon ◽  
Fritz Klocke ◽  
Christian Vogt ◽  
...  
Keyword(s):  
Tungsten Carbide ◽  
Single Point ◽  
Diamond Turning ◽  
Ductile Mode

Precision Cutting of Ceramics with Milling Tool of Single Crystalline Diamond

2015 ◽  
Vol 9 (1) ◽  
pp. 26-32 ◽  
Author(s):  
Hirofumi Suzuki ◽  
◽  
Mutsumi Okada ◽  
Koichi Okada ◽  
Yosuke Ito ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Laser Beam ◽  
Tungsten Carbide ◽  
Micro Milling ◽  
Form Accuracy ◽  
Single Crystalline ◽  
Flat Shape ◽  
Ductile Mode ◽  
Milling Tool ◽  
Milling Tools

Micro milling tools made of Single Crystalline Diamond (SCD) have been developed to machine micro dies and molds made of ceramics. The milling tools of a cylindrical SCD having many sharp cutting edges are fabricated 3-dimensionally by scanning a laser beam. Flat shape of binder-less tungsten carbide mold was cut with the developed milling tool to evaluate the tool wears and its life. Some micro aspheric molds of tungsten carbide were cut with the milling tool at a rotational speed of 50,000 min-1. The ceramic molds were cut in the ductile mode. By cutting with the milling tool, the form accuracy obtained was about 100 nm P–V and the surface roughness 8 nm Rz.

Influence of Ultrasonic Assisted Processing on the Ductility of Binderless Tungsten Carbide

2014 ◽  
Vol 625 ◽  
pp. 587-592 ◽  
Author(s):  
Benjamin Bulla ◽  
Fritz Klocke ◽  
Olaf Dambon
Keyword(s):  
Tungsten Carbide ◽  
Diamond Turning ◽  
Manufacturing Technology ◽  
Cutting Process ◽  
Precision Grinding ◽  
Ultrasonic Assisted ◽  
Ultra Precision ◽  
High Predictability ◽  
Grinding Technique

For the production of mould inserts for precision glass moulding, the ultra precision grinding technique with a subsequent manual polishing operation is typically applied. These processes are time consuming and have a relatively low reproducibility. An alternative manufacturing technology, with a high predictability and efficiency, which additionally allows a higher geometrical flexibility, is the diamond turning technique. In addition the ultrasonic assisted ultra precision cutting process has already proven its potential for machining difficult-to-cut materials, such as steel and glass. By applying the ultrasonic assistance, the classic constraints of the process can be widened significantly. In this publication the process is applied on binderless, nanocrystalline tungsten carbide.

Process window analysis of ductile mode machining of binderless tungsten carbide molds

2018 ◽  
Author(s):  
Marius Doetz ◽  
Ji Eun Lee ◽  
Olaf Dambon ◽  
Fritz Klocke ◽  
Eckhard Langenbach ◽  
...  
Keyword(s):  
Tungsten Carbide ◽  
Process Window ◽  
Window Analysis ◽  
Ductile Mode

Observations on Ductile Laser Assisted Diamond Turning of Tungsten Carbide

2019 ◽  
Author(s):  
Di Kang ◽  
Jayesh Navare ◽  
Yang Su ◽  
Dmytro Zaytsev ◽  
Deepak Ravindra ◽  
...  
Keyword(s):  
Tungsten Carbide ◽  
Diamond Turning

scholarly journals Recent Progress in Precision Machining and Surface Finishing of Tungsten Carbide Hard Composite Coatings

Coatings ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 731
Author(s):  
Christian Micallef ◽  
Yuri Zhuk ◽  
Adrianus Indrat Aria
Keyword(s):  
Tungsten Carbide ◽  
Surface Finish ◽  
Electrical Discharge Machining ◽  
Composite Coatings ◽  
Chemical Vapour ◽  
High Hardness ◽  
Diamond Turning ◽  
Surface Finishing ◽  
Mechanical And Tribological Properties ◽  
Carbide Coatings

Owing to their high hardness, fracture toughness and oxidation resistance, tungsten carbide (WC) coatings are extensively deposited on parts that operate in demanding applications, necessitating wear, erosion, and corrosion resistance. The application of thick and hard WC coatings has an inevitable effect on the original dimensions of the parts, affecting the geometrical tolerances and surface roughness. The capability of achieving a sub-micron surface finish and adhere to tight geometrical tolerances accurately and repeatably is an important requirement, particularly with components that operate in high-precision sliding motion. Meeting such requirements through conventional surface finishing methods, however, can be challenging due to the superior mechanical and tribological properties of WC coatings. A brief review into the synthesis techniques of cemented and binderless WC coatings is presented together with a comprehensive review into the available techniques which are used to surface finish WC-based coatings with reference to their fundamental mechanisms and capabilities to process parts with intricate and internal features. The binderless WC/W coating considered in this work is deposited through chemical vapour deposition (CVD) and unlike traditional cemented carbide coatings, it has a homogenous coating structure. This distinctive characteristic has the potential of eliminating key issues commonly encountered with machining and finishing of WC-based coatings. Here, six contact and non-contact surface finishing techniques, include diamond turning, precision grinding, superfinishing, vibratory polishing, electrical discharge machining, and electropolishing are discussed along with their current use in industry and limitations. Key challenges in the field are highlighted and potential directions for future investigation, particularly on binderless WC coatings, are proposed herein.

Sign in / Sign up

Export Citation Format

Share Document