With the continuous development and advancement of technology, the linear guide rails used, along with other factors, play a decisive role in the performance and quality of linear motors . In industrial applications, linear motors are increasingly replacing drive units with easily worn mechanical transmission components. They can provide higher speed and acceleration, better adjustment accuracy, and precise positioning analysis.
The advantage of linear motors is that the electrical energy they provide can be directly converted into linear motion, requiring no intermediate components for torque conversion. Linear motors have a wide range of applications, including optics, electronics, textiles, machinery manufacturing, loading and unloading, and packaging. For example, the manufacturing and processing of electronic structural components has extremely high requirements: electronic components with dimensions of 1mm × 0.5mm must be positioned with very high precision and secure insertion.
In the electronics industry, the cycle time of automated insertion devices is often less than 0.5 seconds. The drive unit must achieve a positioning accuracy of 5μm while simultaneously reaching high acceleration values, placing extremely high demands on the machinery. The acceleration achievable using linear motors further imposes very high requirements on the mechanical structure of the linear guide. Linear motors generate high, persistent axial forces during operation. The guide device must absorb these forces, which can reach up to 3000N. Therefore, high-dynamic applications require lightweight, highly rigid, and robust mechanical guide devices.
Machine leveling correction. For linear guide rails, two level gauge blocks and a marble ruler are placed on the mounting base. A precision level is then used to adjust the base level, ensuring the base is convex (2-3 divisions) at the center. The surface roughness, flatness, straightness, and appearance of the linear guide rail mounting base are checked. Requirements: After leveling, a laser interferometer must be used to measure the flatness of the main linear guide rail mounting base (usually the linear guide rail surface closest to the right column is used as the main guide rail). The allowable convexity is 0.05mm per 10m, and the allowable convexity for the straightness across the entire stroke is 0.03mm. Roughness requirement: 1.6
Chamfering of the linear guide mounting base surface and the guide rail side reference mounting surface. Requirements: Chamfer radius less than or equal to 3.5mm. If the chamfer is too large or protruding, it should be treated promptly with an oilstone and file; otherwise, it may easily cause poor installation accuracy of the guide rail or interfere with the slider. Machining of the locking threaded holes on the linear guide mounting base surface. Requirements: Confirm that the position of the mounting screw holes is correct, and the center distance of each connected screw hole is greater than 0.1mm or less than 0.1mm within 120mm. To ensure high-precision screw hole processing, CNC equipment is required for positioning and machining. Inspection of the linear guide rail after unpacking. Requirements: Check whether the linear guide rail has a certificate of conformity, whether it is damaged or corroded, clean off the rust-preventive oil, and remove burrs, impact protrusions, and dirt from the assembly surface.
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