In the global granite processing industry, especially for the production of high-precision granite platforms (a core component in precision measurement and machining), the choice of cutting equipment directly determines the efficiency, precision, and cost-effectiveness of subsequent processing. Currently, most processing enterprises in China rely on domestically produced stone processing equipment for daily production, while qualified and high-end manufacturers have introduced advanced foreign production lines and technical equipment. This dual-track development ensures that China’s overall granite processing level remains competitive in the international market, with no lag behind global advanced standards. Among the various cutting equipment available, the fully automatic bridge-type stone disc saw has become the most widely used solution for granite platform cutting, thanks to its superior performance and adaptability to high-value, variable-size processing demands.
1. Core Application of Fully Automatic Bridge-Type Cutting Saws
The fully automatic bridge-type stone disc saw is specifically engineered for cutting granite platforms and marble platform plates—products that require strict precision control and high market value. Unlike traditional manual or semi-automatic cutting equipment, this type of saw adopts fully automatic crossbeam displacement positioning and is controlled by an intelligent control system. This design not only simplifies operation (reducing reliance on manual skill) but also delivers exceptional cutting precision (with dimensional deviations controllable within microns for key parameters) and long-term operational stability. Whether processing small-sized precision granite platforms for laboratory use or large-scale industrial-grade platform plates, the equipment can adapt to variable size requirements without compromising processing quality, making it a cornerstone of modern granite platform manufacturing.
2. Detailed Structure and Working Principle of Stone Cutting Saws
The fully automatic bridge-type cutting saw integrates multiple sophisticated systems, each playing a critical role in ensuring cutting accuracy, efficiency, and equipment durability. Below is a breakdown of its core systems and their working principles:
2.1 Main Guide Rail and Support System
As the “foundation” of the entire equipment, the main guide rail and support system is constructed from high-strength, wear-resistant materials (typically quenched alloy steel or high-precision cast iron). Its primary function is to ensure the stable operation of the entire machine during high-speed cutting. By minimizing vibration and lateral displacement, this system prevents cutting deviations caused by equipment instability— a key factor in maintaining the flatness of granite platform blanks. The support structure is also optimized for load-bearing capacity, enabling it to withstand the weight of large granite blocks (often weighing several tons) without deformation.
2.2 Spindle System
The spindle system is the “precision core” of the cutting saw, responsible for precisely positioning the travel distance of the rail car (which holds the cutting disc). For granite platform cutting, especially when processing ultra-thin platform plates (thicknesses as low as 5-10mm in some cases), the spindle system must ensure two critical outcomes: cutting flatness (no warping of the cut surface) and uniform thickness (consistent thickness across the entire platform blank). To achieve this, the spindle is equipped with high-precision bearings and a servo-driven positioning mechanism, which can control the travel distance with an error margin of less than 0.02mm. This level of precision directly lays the groundwork for subsequent grinding and polishing processes of granite platforms.
2.3 Vertical Lifting System
The vertical lifting system controls the vertical movement of the saw blade, allowing it to adjust the cutting depth according to the thickness of the granite block. This system is driven by a high-precision ball screw or hydraulic cylinder (depending on the equipment specifications), ensuring smooth and stable lifting without jitter. During operation, the system automatically adjusts the saw blade’s vertical position based on pre-set parameters (input via the intelligent control system), ensuring that the cutting depth matches the required thickness of the granite platform blank— eliminating the need for manual adjustment and reducing human error.
2.4 Horizontal Movement System
The horizontal movement system enables the feed motion of the saw blade— the process of moving the saw blade along the horizontal direction to cut through the granite block. A key advantage of this system is its adjustable feed speed: operators can select any speed within the specified range (typically 0-5m/min) based on the hardness of the granite (e.g., harder granite varieties like “Jinan Green” require slower feed speeds to prevent saw blade wear and ensure cutting quality). The horizontal movement is driven by a servo motor, which provides consistent torque and speed control, further enhancing cutting precision.
2.5 Lubrication System
To reduce friction between moving parts (such as guide rails, spindle bearings, and ball screws) and extend equipment lifespan, the lubrication system adopts an oil-bath centralized lubrication design. This system automatically delivers lubricating oil to key components at regular intervals, ensuring that all moving parts operate smoothly with minimal wear. The oil-bath design also prevents dust and granite debris from entering the lubrication system, maintaining its efficiency and reliability.
2.6 Cooling System
Granite cutting generates significant heat (due to friction between the saw blade and the hard stone), which can damage the saw blade (causing overheating and dulling) and affect cutting precision (due to thermal expansion of the granite). The cooling system addresses this issue by using a dedicated cooling water pump to circulate specialized coolant (formulated to resist corrosion and enhance heat dissipation) to the cutting area. The coolant not only absorbs heat from the saw blade and granite but also flushes away cutting debris, keeping the cutting surface clean and preventing debris from interfering with the cutting process. This ensures consistent cutting performance and extends the service life of the saw blade.
2.7 Brake System
The brake system is a critical safety and precision component, designed to quickly and reliably stop the movement of the saw blade, crossbeam, or rail car when needed. It adopts an electromagnetic or hydraulic brake mechanism, which can engage within milliseconds to prevent overtravel (ensuring the cutting stops exactly at the pre-set position) and avoid accidents caused by unexpected movement. During manual adjustment or emergency shutdowns, the brake system ensures that the equipment remains stationary, protecting both operators and the granite workpiece.
2.8 Electrical Control System
As the “brain” of the fully automatic bridge-type cutting saw, the electrical control system is centralized in an electrical control cabinet, enabling both manual and automatic operation modes. Key features include:
- Intelligent Parameter Setting: Operators can input cutting parameters (such as cutting depth, feed speed, and number of cuts) via a touchscreen interface, and the system automatically executes the cutting process— reducing human error and improving consistency.
- Variable Frequency Speed Regulation (VFD): The feed speed of the stone cutting saw blade is controlled by a variable frequency drive, allowing for stepless speed adjustment. This means the speed can be fine-tuned continuously within the operating range, rather than being limited to fixed speed levels— a crucial feature for adapting to different granite hardnesses and cutting requirements.
- Real-Time Monitoring: The system monitors key operational parameters (such as spindle speed, coolant temperature, and brake status) in real time. If an abnormality is detected (e.g., low coolant level or excessive spindle temperature), the system triggers an alarm and stops the machine if necessary— ensuring safe and stable operation.
Post time: Aug-21-2025