Key indicators for the selection of double disc grinding machine
As a high-precision processing equipment, the selection process of double disc grinding machine needs to comprehensively consider technical parameters, production requirements, cost-effectiveness and other dimensions.
Machining accuracy and size range is the core basis for selection. The core value of the double disc grinding machine is to achieve high precision parallelism and surface roughness control, selection needs to be clear about the dimensional tolerance requirements of the workpiece. In addition, parameters such as the minimum dressing accuracy of the grinding wheel and the axial runout of the spindle (usually ≤0.001mm) have a direct impact on the limiting accuracy, and need to be checked one by one with the supplier's technical manual.
The configuration of the grinding wheel system directly determines the processing efficiency and material adaptability. Double disc grinding machines are usually equipped with double spindle grinding wheels, whose material selection needs to match the characteristics of the processed material: CBN (cubic boron nitride) grinding wheels are mostly used for processing hardened steel parts, with a linear speed of up to 80-120m/s; diamond grinding wheels are needed for processing cemented carbide cutting tools and are combined with a special coolant to prevent graphitising. The technical level of the grinding wheel automatic dressing system is particularly critical, with online measurement and intelligent compensation function of the equipment can be grinding wheel loss caused by the accuracy of the deviation control within 0.5μm, significantly reducing the downtime dressing time.
The degree of automation and the matching of production rhythm affect the overall efficiency. Under the trend of Industry 4.0, whether the equipment has a robot interface, automatic loading and unloading system, online inspection module has become the focus of selection. In addition, the CNC system's human-machine interface friendliness, process parameters storage capacity (such as support for more than 1,000 groups of machining programmes) and other details, directly affecting the operator's learning curve and equipment utilisation.
The design quality of the cooling and chip removal system is related to machining stability. If the grinding chips generated during double disc grinding cannot be discharged in time, it may lead to scratches on the surface of the workpiece or clogging of the grinding wheel. High-efficiency filtration systems (e.g. magnetic separation + paper belt filtration with three-stage purification) can keep the cleanliness of the coolant below 15μm for a long time, which can reduce wheel clogging failures by 50% compared with traditional single-stage filtration systems. When processing dust-prone materials such as cast iron, equipment equipped with a negative pressure dust removal device can reduce the PM2.5 concentration in the workshop, in line with environmental regulations.
Equipment rigidity, vibration suppression and long-term stability need to focus on verification. Machine tool bed using mineral castings or cast iron, directly affecting the vibration resistance and thermal stability.
Energy consumption and total life cycle costs need to be included in the economic assessment. The power configuration of the double disc grinding machine needs to balance the processing requirements and energy costs, for example, although the 22kW main motor equipment can cope with high-intensity grinding, but long-term unloaded operation will result in energy waste.
Supplier technical support and industry service experience are invisible decision-making factors. Choose suppliers with successful cases in specific fields (e.g., bearings, semiconductors, tool manufacturing) to get more accurate process support.
