1 precision test
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1) The micrometer of the numerical control lathe is measured with a micrometer, the zero of the micrometer is corrected, and multiple points are measured when measuring the outer circle.
2) The radial round runout test is to use two center hole positioning test. At this time, the machining reference coincides with the measurement reference, which reduces the error and is the correct measurement method. The measurement method is the same as the measurement coaxiality.
3) Length dimension and groove size are measured with vernier calipers.
2 error analysis
1) The outer circle of the CNC lathe is a cone, because the connection between the front and the rear is not coaxial with the axis of the spindle, which is caused by the wrong center position of the CNC machine tailstock.
2) The workpiece generates vibration when turning on a CNC lathe. The reasons are:
1 The tailstock sleeve extends too long or the workpiece support is too loose.
2 The turning tool is not sharp enough or the cutting edge arc is too large.
3 The gap between the top bearings is large or the gap between the medium and small slides is too large.
3) The round jump does not meet the requirements, the reasons are:
1 The front tip has a rounded jump caused by the wear of the bearing with a different axis or a rotating tip of the spindle axis.
2 The center hole of the workpiece is not wiped clean or the center hole is bumped.
3 The tip of the heart of the chicken heart touches the end face of the chuck so that the center hole does not function.
4) The center hole of the CNC lathe is severely worn or bitten due to:
1 Use a fixed tip without oil or the spindle speed is too high.
2 The chicken core chuck is not clamped, and the workpiece stops rotating when turning.
Car end face - drill center hole - one clip and one car outer circle - knurling - trough - chamfering - drilling - car hole - tapping thread - car end face - take the total length.
3 The positioning and clamping of the workpiece of CNC lathe is three-claw self-centering chuck, and the claws are soft.
4 Select the tool outer turning tool and the slot cutter.
5Select equipment to select c6140A lathe CNC machine tool workpiece processing
l The turning process steps are as follows:
(I) Three-jaw self-centering chuck chuck
1) Car end face.
2) Drill the center hole ∞ type A.
3) One clip and one outer circle of the top; the outer circle size of the knurling should be smaller than the actual outer circle size of the pattern by 38mm (0 8 ~ 16) m,
4) Knurling, the modulus of the knurling knife is 0 4 mesh.
5) The slot, the width of the turning tool is 4mm, and the depth of the slot is 12mm.
6) Chamfer three-jaw self-centering chuck clamps the knurled outer circle and wraps the outer circle with copper.
1) Correction of the outer circle II
2) Drilling of 13mm twist drill.
3) Clamp the knurled outer circle with a three-jaw self-centering chuck.
July 04, 2023