Programming instructions

ADT-CNC4620 Programming Manual
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processing allows using the machine tool reasonably, making the distortion and error produced in
roughing be modified in finishing, to improve processing precision; in addition, it also finding crack,
pore and other defects in advance and stop the processing in time.
8. What is the advantage of installing workpiece with clamps?
A: Since the positioning components of the clamp and the relative position of the tool and machine
tool motion can be adjusted in advance, using clamp when processing parts is fast and convenient,
and has high repeat precision, which can ensure the processing requirement of the workpiece.
9. What is the advantage of selecting refined reference according to the principle of unified
reference?
A: The refined reference selected in this principle can be used for the processing of multi-surface
and multi-process, reduce the error due to reference change and improve the processing precision.
In addition, it also can reduce the types of clamp and the workload in clamp design.
10. What is the principle to confirm the direction of clamping force?
A: (1) The direction of clamping force doesn’t destroy the accuracy of workpiece positioning.
(2) The direction of clamping force should minimize the force.
(3) The direction of clamping force should minimize the workpiece distortion.
11. What are the factors that cause principal axis rotation error?
A: Concentricity between over-bearing holes of the bearings, verticality between shell hole
positioning face and the axis, bearing clearance, roundness of the bearing raceway, size and shape
error of the roller, beating of locking nut end, etc.
12. What are the bad results if the beating of the principal axis shoulder bearing surface exceeds the
tolerance?
A: In this case, the holes bored through principal axis feeding and reference surface tilt. In addition,
if the cutter wears due to principal axis feeding is uneven and the wear of some blades speeds up,
tool use is not economical.
13. How the materials difficult process are measured?
A: The materials difficult to process are measured in quality of processed surfaces, chip formation
and difficulty of discharge. If one of above three aspects is poor obviously, the material is difficult
to process.
14. What are the cutting characteristics of materials difficult to process?
A: In the following five aspects:
1) Since the materials difficult to process have low thermal conductivity and high thermal
strength, the cutting temperature is high;
2) The chip distortion has large factor, and the hardening is serious;
3) The materials usually have high strength and thermal strength, and thus the cutting force
is large;
4) Cutter wear soon, and thus the durability is low;
5) Chip rolling, breaking and discharging are difficult.
15. What improvement measures should be taken to cut the materials difficult to process?
A: The following improvement measures should be taken: