2. Generally, the rotary motion of milling cutter is the main motion, and the motion of workpiece (and) milling cutter is the feed motion. Can process planes and grooves, as well as various curved surfaces and gears.
3. Milling machines can not only mill planes, grooves, gear teeth, threads and spline shafts, but also process more complex contours, with higher efficiency than planers, and are widely used in machinery manufacturing and repair departments. Milling machine needs a special fixture-universal indexing turntable to process circular arc.
Extended data:
1, CNC lathe can be used to process complex revolving body shapes. Milling is to fix the blank, feed it on the blank with a high-speed rotating milling cutter, and cut out the required shape and characteristics. Traditional milling is mainly used for milling simple shape features, such as contours and grooves. CNC milling machine can process complex shapes and features.
2. The milling and boring machining center can carry out three-axis or multi-axis milling and boring machining, which is used for machining molds, fixtures, thin-walled complex surfaces, artificial prostheses, blades, etc. When selecting the content of NC milling, we should give full play to the advantages and key functions of NC milling machine.
3, the operator should wear tight overalls, cuff tied tightly; Lesbians should wear protective hats; Wear protective glasses when milling at high speed; Wear a mask when milling iron castings; When operating, it is forbidden to wear gloves to prevent hands from being involved between rotating tools and workpieces.
4, before operation should check whether the milling machine parts and safety devices are safe and reliable; Check whether the safety and reliability of the electrical parts of the equipment are good. When loading and unloading workpieces, the workbench should retreat to a safe position. When fastening the workpiece with a wrench, the direction of force should be far away from the milling cutter to prevent the wrench from touching the tool or fixture when slipping.
5. Use a special pad when disassembling the milling cutter, and don't hold the milling cutter directly by hand. When milling irregular workpiece and clamping it with vice, indexing head and special fixture, the center of gravity of irregular workpiece, vice, indexing head and special fixture should be placed in the middle of the workbench as far as possible to avoid uneven stress and deformation of the workbench.
6, in the fast or automatic feed milling, are not allowed to go to the two extremes of the workbench, so as not to crush the screw. When the machine tool is running, it is forbidden to adjust and measure the workpiece and change the lubrication mode to prevent the hand from touching the tool and hurting the finger. Do not brake by hand until the rotation of the milling cutter stops completely. During milling, do not remove the chips by hand or blow them with your mouth, so as to prevent the chips from hurting your skin and eyes.
7, when the motor fast feed, to open the handwheel clutch, in case the handwheel rapid rotation cuts people. When reversing the workbench, stop the reversing handle at the middle position before reversing. Direct inversion is not allowed. When milling keyway shaft or cutting thin workpiece, be careful not to mill indexing head or workbench.
8. When milling a plane, more than four cutterheads must be used, and appropriate cutting parameters should be selected to prevent the vibration of the machine tool during milling. After the work, stop the workbench in the middle position and lower the lifting table to the lowest position.
9. For the CNC vertical milling machine, the relevant working procedures, spindle speed, tool feed, tool path and continuous offside should be pre-selected according to the process requirements before work. Put the electric knob in the "alignment" position for trial operation. After confirming that there is no problem, put the electric knob in the automatic or semi-automatic position for work.
References:
HowNet Space —— A Method of Machining Arc Surface on Milling Machine