| Quantity: | |
|---|---|
II. Core structure
Slide (Block): Built-in roller circulation circuit, cage, sealed end cover/nozzle, integrated motion and load bearing functions, is the core execution unit to achieve linear reciprocating motion.
Rail: A long rail body that has been precisely ground to provide a stable raceway with standard mounting holes on the side, which can be directly locked to the equipment frame.
Roller: a cylindrical rolling element, the line contact design is the core of the load and rigidity, which greatly improves the contact area and force uniformity compared to the ball.
Auxiliary components: dust sheet, lubrication hole, preload adjustment structure to ensure the stability of operation, dust sealing and service life.
III. Key technical parameters
Specification series: divided by section height, common 20, 25, 30, 35, 45, 55, 65 series, the larger the section size, the stronger the bearing capacity and structural rigidity.
Accuracy grade: ordinary grade (N), precision grade (H), ultra-precision grade (SP/UP), H grade is commonly used for heavy-duty telescopic forks, and SP/UP grade is commonly used for high-end machine tools.
Pre-loading grades: Z0 (light pre-loading), Z1 (standard pre-loading), Z2 (heavy pre-loading), Z1/Z2 levels are preferred for heavy-duty working conditions to completely eliminate motion gaps and improve rigidity.
Rated load: includes dynamic load and static load two core indicators, which directly determine the bearing capacity and service life of the guide rail, and is the core basis for type selection.
Running speed: Suitable for 0.1-2 m/s conventional industrial running speed, heavy load scenarios need to match the corresponding lubrication and transmission structure.
IV. Core application scenarios
Heavy-duty telescopic fork: double-extension/triple-extension heavy-duty fork, especially suitable for steel, wood, and scrap processing equipment, effectively solving the sagging and deviation problems of long-stroke telescopic.
Heavy machine tools: gantry machining center, laser cutting machine, numerical control grinder sliding table/beam, to ensure the rigidity and stability of high-precision cutting.
Automatic heavy-duty handling: large three-dimensional warehouse stacker, automobile manufacturing production line heavy-duty transfer device, metallurgical equipment conveying system.
Precision heavy-duty equipment: robot heavy-duty joints, large-scale testing equipment, and precision transmission mechanisms for marine/aviation equipment.
Other heavy-duty industrial scenarios: shield machines, mining equipment, heavy-duty injection molding machines, and other equipment with extreme requirements for load-bearing and rigidity.
Five, the core points of selection
Load accounting: Select the type according to the maximum static/dynamic load, and reserve 20% -30% safety factor. In heavy-load telescopic scenarios, additional calculation of cantilever deflection is required to avoid structural deformation.
Stroke and speed: to match the telescopic stroke of the equipment, high-speed operation (> 1m/s) requires matching the transmission structure (such as rack and pinion) and lubrication scheme.
Installation space: Confirm the guide rail section, slider size and equipment installation spacing, and support customized structures to adapt to narrow installation spaces.
Environmental adaptation:
Humid/corrosive environment: choose stainless steel or hard chrome plating and nitriding treatment.
Dust/oil environment: choose a high-sealing grade slider with self-lubricating grease.
Accuracy requirements: telescopic fork positioning commonly used ± 0.5-± 2mm, choose H grade; precision machining equipment requires SP/UP grade ultra-precision accuracy.
Materials and craftsmanship
Material: Mainstream GCr15 (bearing steel), 42CrMo alloy steel, after quenching, tempering treatment, hardness of HRC58-62, to ensure excellent wear resistance and structural strength.
Surface treatment: blackening, hard chrome plating, nitriding treatment, improve rust resistance, wear resistance, corrosion resistance.
Processing technology: precision milling, overall quenching, and ultra-fine grinding to ensure that the straightness and parallelism of the guide rail are up to standard (conventional straightness ≤ 0.01mm/m), ensuring movement accuracy.
Seven, customization direction (suitable for industrial equipment needs)
Extended/customized length: cut the length of the guide rail on demand, process limit holes at both ends, and install the reference plane.
Special structure: side slotting/punching, integrated rack guide rail, suitable for telescopic fork rack transmission requirements.
Special materials: stainless steel 304/316 (clean/corrosive environment), high-strength alloy steel (heavy-duty impact resistance).
Customization of supporting components: lengthened slider, widened slider, eccentric shaft preload structure, suitable for heavy-duty fine-tuning needs.
Eight, use and maintenance points
Installation: Ensure the flatness of the installation base surface, and the parallelism error is less than or equal to 0.02mm/m to avoid the deformation of the guide rail due to uneven bolt preload.
Lubrication: Regularly add special grease, high-speed and heavy-duty scenarios require oil mist/oil injection lubrication to prolong the life of rollers and raceways.
Dust-proof: Install a dust cover to prevent dust from entering the interior of the slider and prevent wear and tear from getting stuck.
Inspection: Regularly check the straightness and smooth operation of the slider, and replace the aging seals in a timely manner.
