design of deep holes
Avoid interrupted cuts. Because the tungsten carbide head is fairly brittle, a gun drill should always cut into solid material to avoid breaking of the cutting edge. […]
effects of drill wandering
When drilling two deep holes from opposing sides to create an extra long hole, they may meet only partially. To prevent a flow restriction, the hole depths should be specified so that the holes overlap at least 10 mm at the meeting point. […]
cooling of cutting edge
The drill has a hole along it’s entire length through which coolant is pumped at high pressure. the coolant exits right behind the cutting edge. It cools and lubricates the drill for minimum friction within hole. It also washes the chip out through the open sector of the drill. The chips are then separated from [...]
gun drill material
The tip, at the working end of the drill, is made from a tungsten-carbide alloy, which is much harder and longer lasting than high-speed steel. The head is brazed to a long steel tubing, which is held at it’s other end in the machine chuck. The tip is about 40mm long when new, the cutting [...]
gun drilling and ordinary drilling
So far deep hole drilling( gun drilling) has been used more and more widely in injection molds. This method requires a special machine or a deep hole drilling adaptor to another machine, […]
modern mold making
modern tooling machines for mold making generally feature multiaxial CNC controls and highly accurate positioning systems. the result is higher accuracy and greater efficiency against rejects. […]
the surface quality of a plastic part
after heat treatment, the machined inserts are finished, ground and polished to obtain a good surface quality,because the surface conditions of a cavity are, in the end, responsible for the surface quality of a plastic part and its ease of release. Defects in the surface of the cavity are reproduced to different extends depending on [...]
high-speed cutting and simultaneous five-axis milling
competition has recently developed between high-speed cutting(HSC) and simultaneous five-axis milling. HSC is characterized by high cutting speeds and high spindle rotation speeds. Steel materials with hardness values of up to 62HRC can also be machined with contemporary standard HSC millers. Sometimes, HSC machining can be carried out as a complete machining so that the [...]
a combination of milling and eroding in a mold manufacturing
for the production of injection and die-casting molds, a combination of milling and eroding may also be performed. The amount of milling should be maximized since the machining times are shorter on account of higher removal capability. However, very complex contours, filigree geometries and deep cavities can be produced by subsequent spark-erosive machining. The electrode [...]
the mold industry lays great emphasis on efficiency
the mold industry lays great emphasis on efficiency. Sometime, considering the credit therein, even when business negotiation between the manufacturing and the customers is still under way, […]