What is the milling and boring machining center for?

The milling and boring machining center can carry out three-axis or multi-axis milling and boring machining, which is used for machining molds, gauges, fixtures, thin-walled complex curved surfaces, artificial prostheses, blades and so on. When selecting the content of NC milling, we should give full play to the advantages and key functions of NC milling machine.

Processing object

(1) plane parts

The characteristics of planar parts are that the machined surface can be parallel to the horizontal plane, perpendicular to the horizontal plane, or at a fixed angle with the horizontal plane; Most of the parts processed on the CNC milling machine belong to plane parts, which are the simplest parts in CNC milling. Generally, only two-axis linkage or three-axis linkage of three-coordinate CNC milling machine can be processed. In the process of machining, the machined surface is in surface contact with the cutter, and rough and finish machining can be carried out with end milling cutter or bull cutter.

(2) Curved surface parts

The characteristic of curved surface parts is that the machining surface is a spatial surface, and the machining surface always contacts the milling cutter point during machining. Surface finishing is mostly carried out by ball-end milling cutter.

Extended data

Key points of operation

1, the operator should wear tight overalls with tight cuffs; 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.

2. Before operation, check whether all parts and safety devices of the milling machine are safe and reliable; Check whether the safety and reliability of the electrical parts of the equipment are good.

3. 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 avoid the milling cutter to prevent the wrench from touching the tool or fixture when slipping.

4. Use a special pad when disassembling the milling cutter, and don't hold the milling cutter directly by hand.

5. When milling irregular workpiece and clamping it with vice, indexing head and special fixture, the center of gravity of irregular workpiece and 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.

7. 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.

8, before the milling cutter rotation is not completely stopped, can't brake by hand.

9. In the milling process, don't remove the chips by hand or blow them with your mouth to prevent the chips from hurting your skin and eyes.

10, when the motor is fed quickly, open the handwheel clutch to prevent the handwheel from rotating rapidly and hurting people.

1 1. When reversing the workbench, stop the reversing handle at the middle position before reversing. Direct inversion is not allowed.

12. When milling a keyway shaft or cutting a thin workpiece, it is forbidden to mill the indexing head or workbench.

13. When milling a plane, it is necessary to use more than four cutterheads and select appropriate cutting parameters to prevent the vibration of the machine tool during milling.

14. After the work, stop the workbench in the middle position and lower the lifting table to the lowest position.

15. For the CNC vertical milling machine, the process, 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.

Baidu encyclopedia-milling process

Baidu encyclopedia-milling