Steps for machining brake discs on CNC vertical lathe

Detailed steps for machining brake discs on CNC vertical lathes

Brake discs are usually disc parts. The key to machining is to ensure the flatness, verticality and position accuracy of the end faces.
The structural characteristics of CNC vertical lathes are that the worktable is vertical, which is suitable for machining parts with larger diameters and lower heights. Brake discs just meet this feature. The machining steps generally include clamping, rough turning, semi-finishing turning, finishing turning, and possibly drilling and quality inspection.

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1.Machine tool status confirmation: Check whether the CNC vertical lathe body, column, guide rail and other components are intact, ensure that the thermally symmetrical box-type rib plate structure is not deformed, and the X/Z axis span meets the processing accuracy requirements.
2.Lubrication and cooling system: Start the automatic depressurization lubrication system to confirm that the oil supply to each lubrication point is normal; check whether the coolant pipeline is unobstructed to avoid deformation of the brake disc caused by cutting heat.
3.Tool preparation: Select carbide tools according to the material of the brake disc (such as cast iron), coarse tooth tools for rough turning, fine grinding tools for fine turning, and preset tool parameters (cutting speed, feed rate, cutting depth).

1.Rough reference positioning: Take the large end face of the brake disc as the rough reference, clamp the ventilation groove through the hydraulic chuck to ensure axial positioning accuracy.
2.Fine reference conversion: When fine turning, take the small end mounting flange end face as the reference, and fix it by supporting the inner hole to reduce clamping errors.
3.Special tooling application: Use the clamping ventilation groove tooling to ensure uniform thickness of the two brake surfaces and avoid inconsistent deformation during high temperature braking.

1.Cutting parameters: Rough turning cutting speed is controlled at 80-120m/min, feed rate is 0.3-0.5mm/r, cutting depth is 2-3mm, and the rough stock residue is quickly removed.
2.Processing content: Rough turning of brake surface, mounting flange surface and hole, with 0.5-1mm fine turning residue reserved.

1.Layered cutting: Use layered step-type cutting to avoid stress concentration caused by excessive single cutting amount.
2.Cooling control: Continuously spray coolant to reduce the temperature of the cutting area and reduce thermal deformation.

Surface flatness improvement: Cutting speed is reduced to 60-80m/min, feed rate is 0.1-0.2mm/r, rough turning marks are corrected, and the foundation is laid for finishing.

1.Double-tool synchronous processing: The upper and lower double tool holders are used to cut the two brake surfaces at the same time, and the cutting forces offset each other, reducing the deformation by more than 50%.
2.Precision control: Finishing cutting depth is 0.1-0.2mm, surface roughness is less than Ra0.8, parallelism is ≤0.05mm, and flatness is ≤0.03mm.
Tool compensation: Tool wear is compensated in real time through the CNC system to ensure dimensional stability.

1.Three-coordinate measurement: Use the machine tool's built-in probe to detect key dimensions, such as inner hole diameter and brake surface thickness.
2.Dynamic balance test: Perform dynamic balance check on the finished brake disc to ensure braking stability.

1.Deburring: Use a nylon brush or special tools to remove machining burrs.
2.Surface treatment: Spray anti-rust paint or perform phosphating treatment to improve corrosion resistance.

1.Double tool holder design: complete rough and fine processing in one clamping, and increase production efficiency by 30%-50%.
2.Automation integration: cooperate with the robot to realize automatic loading and unloading, reducing manual intervention.

1.Thermal symmetric structure: the thermal deformation of the bed is reduced by 60%, and the long-term processing accuracy is stable.
2.Closed-loop control: through the grating ruler, the position information is fed back in real time to ensure that the processing repetition accuracy is ≤0.005mm.

1.Energy-saving design: variable frequency spindle motor saves 30% energy and reduces the long-term use cost by 50%.
2.Tool life: high rigidity spindle reduces tool vibration and extends tool life by more than 20%.

Operators must wear anti-smashing shoes, protective glasses, and long hair must be tied into a work hat.

It is strictly forbidden to load and unload tools when the spindle is rotating, and it is forbidden to touch the rotating parts with your hands.

When processing is abnormal, press the emergency stop button immediately and troubleshoot according to the regulations.

CNC vertical lathes can efficiently and accurately complete brake disc processing, meeting the stringent requirements of automobile braking systems for high precision and high reliability.