quality Tungsten Carbide Buttons & Tungsten Carbide Inserts manufacturer

  Ohip formation and chip evacuation are crical issues in driling and depend on the workpiece material. choice of drllinsert geomeiry, coolantpressure/volume and cuting data. hip jamming can cause radial movement of the dll and consequently affect hole auality, drllife and reiabityor drill/insert breakages. Chip formation is acceptable when the chips can be evacuated from the drillwithout disturbance.The best way to identify this is to listen duringdriling. A consistent sound means that chip evacuation is good, but an interrupted sound indicates chip iamming. Check the feed force or powemonitor, f there are iregulariies, chip jamming could be the reason. Look at the chips: if they are long and bent, instead of curled, chip jamming has occurred. Look at the hole: if chip jamming has occurred, an uneven surface will be visible                                       Achieving good hole quality Chip evacuation Make sure chio evacuationis satisfactorv, Chio amming afects hole oualty and relablitvtoolie, pnlinsert aeometv and cuting data are crucia   Stability, tool set-up use the shonest oossible drl. use a rioid and accurate toolholder with minimum run-out wake surethe macnine soindle is in good condition andis well-aligned. Ensure that the component is fixed and stable. Estabish correct feed rates for irregular, anqular surfaces and cross holes.

Threads are classified according to the main functions they perform in a component. Primary functions of a thread:           vkdcarbide.com   To form a mechanical coupling To transmit motion by converting a rotational movement into a linear movement, and yiceversa. To obtain a mechanical advantage, by using a small force tocreate a larger force.   Threads are also classified into various profiles or forms. The selection of these forms wilbe influenced by many other secondary, but still vital, functions. Thread forms The thread profile defines the geometry of a thread and includes component diameters(major, pitch and minor), the thread profile angle, pitch and helix angle. The most commonthread forms or profiles produced today are shown below.

Material compositon Most metal products contain tunesten carbide and cobalt. Other substances that may be presentin hard metal are titanium carbide, tantalum carbide, niobium carbide, chromium carbide.molybdenum carbide or vanadium carbide. Some grades contain titanium carbonitride and/ornickel. Routes of exposure Grinding or heating of hard metal blanks or hard metal products will produce products that give ofdangerous dust and fumes. Avoiding ingestion and contact with skin or eyes is very important. Acute toxicity Intake of the aforementioned substances is toxic. inhalation may cause irritation and inflammationof the airways. Significantly higher acute inhalation toxicity has been reported during simultaneousinhalation of cobalt and tungsten carbide compared to inhalation of cobalt alone. Skin contact can cause irritation and rash. Sensitive individuals may even experience an alergicreaction. Chronic toxicity Repeated inhalation of aerosols containing cobalt may cause obstruction of the airways. Prolongedexposure to increased concentrations may cause lung fibrosis or lung cancer. Epidemiologicalstudies indicate that workers previously exposed to high concentrations of tungsten carbide/coballcarried an inereased risk of developing lung cancer.Cobalt and nickel are potent skin sensitizers. Repeated or prolonged contact can cause irritationand sensitization. Risk phrases Toxic: danger of serious damage to health by prolonged exposure through inhalation Toxie when inhaled Limited evidence of a carcinogenic effect. May cause sensitization by inhalation and skin contact Preventive measures Avoid formation and inhalation of dust. Use adeguate local exhaust ventilation to keep personalexposure well below nationally authorised limits. If ventilation is not available or adeguate, use respirators appropriately approved for the purposeWse safety gogsles or glasses with side shields when necessary. Avoid repeated skin contact. Wear suitable gloves. Wash skin thoroughly after handling Use suitable protective clothing. Launder clothing if needed. Do not eat, drink or smoke in the working area. wash skin thoroughly before eating, drinking orsmoking.