The following is a detailed explanation of the rounding operation of the chamfering machine, comprehensive technical points and operation steps:
1. The basic principle of rounding
1. Tool selection
(1) The rounding corner needs to use an arc edge tool (such as an R-type milling cutter or grinding wheel), and its radius should match the target fillet radius. For example, R3 fillet needs to be used to machine R3 fillet, and the curved surface is cut through the rotation of the spindle.
(2) The CNC model can automatically match the tool radius compensation through the program.
2. Machining path control
(1) The fillet machining path needs to be fed along the tangent direction of the workpiece edge, keeping the center trajectory of the tool concentric with the theoretical fillet. The CNC model realizes the arc interpolation motion through the G02/G03 command.
2. Operation steps (taking CNC chamfering machine as an example)
1. Parameter setting
(1) Input the fillet radius value (e.g. R5) to the control system.
(2) Set the spindle speed (2000-3000rpm is recommended for soft materials such as aluminum, 800-1500rpm is recommended for hard steel parts).
2. Programming methods
(1) Direct annotation method: Add R parameters after the G01 command, such as G01 X50 Z-10 R5 means to generate R5 fillet at the (X50, Z-10) position.
(2) Intersection calculation method: If the drawing is marked as the intersection size of the extension line, the start/end coordinates need to be calculated by trigonometric function (formula: X=middle±2xRxtan(0/2)).
3. Processing execution
(1) The double-head model needs to adjust the feed speed of the two spindles synchronously to avoid asymmetry of the fillet due to desynchronization.
(2) Real-time monitoring of cutting status, vibrating knives need to be checked for tool wear or loose fixtures.
3. Precautions
1. Material adaptability
(1) Sharp carbide knives should be used for plastic parts to avoid melting the material due to high temperature.
(2) Stainless steel and other hard materials need to reduce the feed rate and add coolant.
2. Accuracy guarantee
(1) Regularly calibrate the spindle concentricity (error ≤ 0.05mm) to prevent fillet contour deviation.
(2) Before batch processing, it is necessary to try cutting to measure whether the fillet size meets the standard (R gauge can be verified).
3. Safety specifications
(1) It is strictly forbidden to touch the rotating knife with bare hands, and the protective cover must be closed.
(2) Trigger the emergency stop button immediately in case of emergency.
4. Solving common problems
(1) The fillet is not smooth: check whether the cutting edge of the tool is broken, or try to reduce the feed speed.
(2) Dimensional deviation: Review the R-value input in the program, or check whether the workholding is offset.
Double-head fillet asymmetry: Adjust the feed timing of the two spindles or check the synchronization of the servo motor.
With the above methods, rounding can be completed efficiently. If further optimization is required (e.g. compound chamfer drilling), it is recommended to choose a model with multi-process integration functions.
