Cutting motion and cutting dosage

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  • source:MOMEYER CNC Machining
Normal >1.

Cutting motion Normal > cutting motion can be divided give priority to motion and feed motion. Normal > advocate motion is to make workpiece and cutting tool produce opposite motion in order to have the basiccest campaign of cutting, advocate athletic rate is top, the power that consumes is the greatest. In cutting motion, advocate motion has only. It can be finished by workpiece, also can finish by cutting tool. Can be whirligig, also can be sharp movement. For example the whirligig of the workpiece on lathe; When dig of double housing planer is cut, the linear reciprocate of workpiece; The linear reciprocate of shaping machine planing tool; The whirl of the emery wheel on the broach on the milling cutter on milling machine, drilling machine and grinder is cutting when treatment advocate motion (L seeing a picture) . Normal Align=center> pursues dig of E) of the garden outside grinding of D) of bore of C) of plane of milling of B) of the circle outside turning of A) of kinematic diagram of 1 cutting treatment cuts planar Normal >normal Align=left> feed is ceaselessly by cut investment cutting, with gradually the campaign that cutting gives whole appearance. That is to say, move without this, cannot successive cutting. Feed campaign is general speed is inferior, the power that consume is less, can comprise by one or more motion. Can be successive, also can be discontinuous. If the cutting motion that plane of the circle outside turning, milling, dig cuts the garden outside planar, bore, grinding pursues 1 is shown. Normal >2.

Cutting dosage pursues 2 in cutting treatment process, 3 kinds of surfaces are formed on workpiece, if the graph is shown 2 times, with turning treatment is exemple. Normal >1) the face that after already machining exterior cutting, gets. Normal >2) the surface that work surface is about to cut metallic layer. Normal >3) cutting surface is in by the metallic surface of cutting. Normal >normal > cutting dosage is to point to the floorboard of the person that Vf) of feed F (or cutting speed, feed speed and back penetration of a cutting tool measure ap3, can call cutting dosage 3 element. Normal > (1) point of the make choice of on blade of cutting rate cutting is opposite at workpiece edge advocate the instantaneous speed of athletic way calls cutting rate. In order to express, the unit is M/min, or M/s. Normal > if advocate motion is whirligig (wait like turning, milling) , cutting speed is his commonly the biggest linear velocity, computational formula is: M/s Normal > type: D, workpiece or cutting tool diameter (Mm) Normal >n or cutting tool rotate speed (R / Min) . Graph 3 cutting dosage 3 element Normal Align=left>   (2) feed F advocate the opposite displacement quantity of the cutting tool inside one loop of motion or unit time and way of movement of workpiece edge feed calls feed. If the graph is shown 3 times, cutting tool of the tine that use sheet (be like lathe tool, planing tool) when undertaking machining, every turn or every journey cutting tool is in commonly used cutting tool or workpiece relative to the displacement of workpiece the capacity comes magnanimity on feed movement way, call every to turn feed (Mm/r) or every journey feed (Mm/st) ; With much tine cutting tool (be like milling cutter) when treatment, the instantaneous speed that usable also feed moves namely feed speed will state, in order to express, the unit is Mm/s or Mm/min. Normal >(3) to be nodded through the make choice of on cutting blade perpendicular at this bits advocate in the cut dimension plane of athletic way, perpendicular the cut size that measures at feed movement way, call amount of back penetration of a cutting tool, in order to express, the unit is Mm. When the circle outside the car, usable computation leaving type: Mm Normal > type: , workpiece work surface (graph 3) diameter, mm; Normal > , workpiece already machined exterior diameter, mm. Normal > bore, usable computation leaving type: Mm Normal > type: , workpiece already machined exterior diameter, namely bore diameter, mm. CNC Milling