CNC Cylindrical Grinding Machine is a high-precision metal cutting machine tool, mainly used for precision grinding and processing of cylindrical or conical and other rotating body parts such as external cylindrical surfaces, external conical surfaces, and end surfaces of shaft shoulders, etc., in order to achieve the required dimensional accuracy, shape accuracy and surface roughness. The relative motion of the grinding wheel and the workpiece is controlled by the CNC system, and the grinding wheel rotates at high speed as the main motion to cut the surface of the workpiece and remove the excess material. At the same time, the workpiece makes a rotating circular feeding movement and a linear feeding movement in the axial direction, so that the grinding wheel can gradually grind the entire workpiece surface, thus realising the precision machining of the workpiece’s outer circle.
Recently, a gear shaft manufacturer found us, want to buy a cylindrical grinding machine for grinding processing, asked us to match him with a suitable machine, the length of the workpiece in 160mm-400mm, the diameter of the workpiece in the 20mm-35mm, according to his needs, we matched a suitable cylindrical grinder to meet the customer’s needs, the customer is very satisfied.
A gear shaft is a mechanical part that supports a rotating part and rotates with it to transmit motion, torque or bending moment. It is mainly used to support rotating parts such as gears, and by cooperating with these parts, it achieves the transmission of power and the control of motion. In a mechanical transmission system, the gear shaft plays a vital role in transferring power from one component to another to ensure the normal operation of the entire system.
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CNC cylindrical grinding machine processing gear shaft steps
1. Preparation before machining
Study the drawing: Define the size and accuracy of the gear shaft.
Selection of equipment: Determine the grinding machine according to the specification and precision of the gear shaft.
Preparation of jigs and fixtures: pick the right jigs and fixtures to ensure that the workpiece is positioned and clamped firmly.
Selection of grinding wheels: determine the grinding wheels according to the material, install them correctly and adjust the balance.
Prepare tools: If grooving and other machining is required, install the tools and adjust the position.
Check the blank: check the blank size, hardness, clean the surface burrs.
2. Tool setting and parameter setting
Installation of workpiece: clamp the gear shaft with a jig to ensure that it is coaxial with the grinding machine spindle.
Tool setting: manually or automatically make the grinding wheel close to the workpiece to determine the tool setting point.
Setting parameters: Input wheel speed, feed speed, grinding depth and other parameters in the CNC system to distinguish between rough and fine grinding parameters.
3.Processing
Rough grinding: start the grinder, rough grinding according to the parameters, leaving 0.5 – 1mm allowance for fine grinding.
Measurement: stop the machine to measure the size, and adjust the parameters when the deviation exceeds the limit.
Precision grinding: strictly control the parameters of precision grinding, grinding depth 0.05 – 0.1mm.
4. Post-processing
Dismantle the workpiece: switch off the power, loosen the fixture to take down the gear shaft, prevent from bruising.
Inspection: Comprehensively check the size, shape accuracy and surface roughness.
Cleaning and maintenance: Remove workpiece debris, coolant, and maintain the grinder.
According to the customer’s needs, we finally matched MK1320 CNC cylindrical grinding machine, this machine is a two-axis linkage CNC cylindrical grinding machine. The overall structure of the machine tool adopts the table moving T-type layout, which is mainly composed of bed, table, head frame, tail frame, pad plate and grinding wheel frame. The bed, table, pad, transverse slide, grinding wheel holder and other basic components are made of resin sand moulding, high-strength and low-stress HT300 pearlitic cast iron, which has high rigidity and excellent precision stability.
| Item | Unit | MK1320 |
| Max.length grinding | mm | 520 |
| Dia.grinding(O.D) | mm | Ф8～Ф320 |
| Max. weight of work piece | kg | 50 |
| Center height | mm | 125 |
| Max.rotation angle of worktable | ° | -3°～+7° |
| Specification of grinding wheel | mm | Φ400×50×Φ203 |
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