Diamond cut wheels, characterized by their unique metallic texture and visual depth, are standard on many mid-to-high-end vehicles. However, daily driving inevitably leads to scuffs, abrasion, oxidation, deformation, and even cracking, causing them to lose their original luster and structural integrity. For auto repair shops, wheel repair is a high-margin core service, and the consistency and standardization of the repair effect directly determine the shop's reputation and profitability.

Gubot, as an industry benchmark brand, has established a comprehensive, standardized, full-link repair procedure that covers 8 essential steps: Wheel Inspection and Tire Dismounting → Wheel Cleaning and Paint Stripping → Wheel Straightening → Crack Repair and Surface Welding → CNC Wheel Diamond Cutting → Coloring/Coating → Curing → Tire Installation and Dynamic Balancing. Each step utilizes exclusive professional equipment, ensuring both repair quality and operational efficiency. This system allows even new technicians to consistently achieve high-quality repair results.

The core logic of a complete Gubot wheel repair procedure is a layered progression: from basic assessment and disassembly, to structural damage repair, and finally to surface beautification and vehicle adaptation. Every step is interconnected and indispensable. Neglecting any single step could lead to safety hazards, cosmetic defects, or operational failure upon reinstallation.

Below, we detail this standardized repair process, combining the application of equipment and practical requirements for each stage.

Step One: Wheel Inspection and Tire Dismounting — The Foundational Prerequisite

The starting point of the entire repair process is wheel inspection and tire dismounting. The primary goal is a comprehensive assessment of the wheel damage status and the safe separation of the tire from the rim, which sets the direction for subsequent repairs. The core value of this step is identifying irreparable severe damage early on, preventing wasted effort, and ensuring neither the wheel nor the tire is damaged during disassembly.

The process involves two core actions:

First, the operator must conduct a thorough wheel inspection, focusing on cracks, deformation, severe oxidation, or abnormal thickness. They must confirm the wheel model, size, and basic parameters to determine if the damage meets repair standards. If severe structural cracks or irreversible deformation are present, the owner must be informed that repair is impossible to avoid subsequent safety risks.

Second, professional tire changers are used for the dismounting operation. Operators must strictly adhere to equipment specifications to prevent the changer's clamps or pry bars from scratching the wheel edge, ensuring the rim remains intact for the repair and reinstallation phases. The key to this stage is comprehensive inspection and safe dismounting. Using a professional tire changer significantly reduces the risk associated with manual disassembly, preventing wheel deformation or tire damage caused by improper force, while also boosting efficiency.

Step Two: Wheel Cleaning and Paint Stripping — Preparing the Clean Substrate

The core objective of wheel cleaning and paint stripping is the complete removal of dirt, oxidation layers, and old paint from the wheel surface, creating a clean, flat substrate for subsequent straightening, welding, and CNC diamond cutting. Residual impurities or old paint layers will compromise the adhesion and effectiveness of subsequent processes, potentially leading to paint peeling or uneven diamond cut textures.

In practice, initial cleaning removes floating dust, mud, and basic oil stains. This is followed by the core stripping phase, typically using a Dry Sandblast Machine or Wet Sandblast Machine to remove old paint and stubborn oxidation layers. The sandblasting process uses high-pressure abrasive projection to rapidly and uniformly strip the old coating. It also removes minor scratches and burrs, leaving a uniformly rough texture that enhances the adhesion of the new coating. Operators must control the pressure and distance of the sandblaster to avoid damaging the wheel's base material.

The standard for completed cleaning and stripping is: the wheel surface is free of dirt, oxidation, and old paint, lacks obvious burrs, and feels smooth and uniform, ready for the repair processes ahead. A clean substrate directly improves the stability of subsequent straightening, welding, and coating results.

Step Three: Wheel Straightening — Precise Form Restoration

Wheel straightening is crucial for repairing deformation issues, restoring the wheel's original shape and dimensional accuracy, which ensures safety and proper fitment when reinstalled. Wheels often suffer damage like bent edges or deviation in curvature after impact. Failure to straighten them can lead to uneven tire load, driving vibration, and potentially serious accidents.

The operation requires a professional Wheel Straightening Machine (like the Full-automatic wheel straightening machine or Gantry wheel straightening machine). Based on the damage location and severity determined in the initial inspection, a specific straightening plan is devised. The cleaned and stripped wheel is secured onto the machine. Using the equipment's precise positioning system, the deformation point is locked. The machine then utilizes hydraulic or mechanical transmission structures to slowly and accurately correct the deformed area, preventing cracks caused by excessive force. Throughout the correction process, the wheel's dimensions and curvature are repeatedly measured to ensure the restored shape meets original factory specifications without residual deformation.

The key to wheel straightening is the precise control of force and scope. Professional Wheel Straightening Machines use quantified pressure adjustment and precise positioning to eliminate the subjective errors of manual straightening, ensuring stability and safety. After straightening, the wheel must be re-inspected for hidden cracks before moving to the next stage.

Step Four: Crack Repair and Surface Welding — Structural Safety Assurance

Crack repair and surface welding are critical for wheels with cracks or localized damage. The core goal is to repair structural damage and restore the load-bearing strength and safety of the wheel. Even fine cracks in a wheel, a core load-bearing component, can propagate during driving, leading to catastrophic failure. Therefore, this step is central to guaranteeing the wheel's post-repair safety.

The repair plan depends on the crack's length, depth, and location, utilizing professional welding equipment such as an aluminum welder (most automotive wheels are aluminum alloy and require a dedicated aluminum welder). The cracked area is first ground down to increase the welding contact surface for a secure joint. An aluminum welder then performs the repair. Welding temperature and current must be controlled to prevent high heat from degrading the wheel material's performance. After welding, the repaired area is meticulously ground smooth to transition naturally with the wheel surface, free of obvious bumps or depressions.

It is vital to note that not all cracks are repairable. If a crack runs through the wheel body or affects critical load-bearing areas, it must be deemed irreparable to avoid safety risks. The use of specialized equipment, such as an aluminum welder, ensures the strength and ductility of the welded joint, guaranteeing the repaired wheel possesses sufficient load capacity—a quality unattainable through manual or general welding. Upon completion, the repaired area is re-inspected to confirm the absence of welding defects and a completely closed crack, ensuring the surface flatness meets the requirements for subsequent diamond cutting.

Step Five: CNC Wheel Diamond Cutting — Surface Texture Formation

CNC Wheel Diamond Cutting is the central process for enhancing the wheel’s aesthetic quality. The primary goal is to use precise computerized numerical control (CNC) machining to create uniform, aesthetically pleasing metallic texture lines on the wheel surface, restoring the wheel's original visual effect. This is the defining step for diamond cut wheel repair, and processing accuracy directly determines the final appearance quality.

This step requires a professional CNC Wheel Diamond Cut Machine. The process involves four core steps:

1. Fixturing: The straightened and welded wheel is precisely secured onto the CNC machine’s chuck, ensuring stability to prevent vibration that could lead to texture misalignment during machining.
2. Parameter Setting and Path Planning: Based on the wheel model, size, curvature, and original factory diamond cut texture parameters, the corresponding processing parameters are set in the equipment. Gubot CNC machines feature a vast vehicle model database for automatic parameter matching. Additionally, the integrated infrared + laser dual-probe system scans the actual wheel condition, intelligently correcting the machining path without the need for manual programming.
3. Intelligent Cutting Execution: Once started, the CNC system automatically executes the diamond cutting based on the preset path. Gubot’s upgraded machines feature an automatic tool setting function, which reduces the risk of wheel damage caused by human tool-setting errors, ensuring a precise and stable cutting process.
4. Effect Inspection: After machining, the process is paused to inspect the diamond cut texture, confirming uniformity and direction meet requirements. Any minor blemishes can be corrected with slight parameter adjustments for a second pass.

Step Six: Coloring/Coating — The Color Refurbishment Stage

The core goal of coloring is to apply new liquid paint or powder coating to the diamond cut wheel, restoring its original color and further enhancing surface protection. Although the diamond cut surface has texture, it lacks protection. The coating step adds color and a layer of basic protection to prevent oxidation.

The application must be done in a dust-free, ventilated environment, utilizing core equipment such as the Electrostatic Powder Spraying Machine and a powder recovery system. First, paint or powder matching the original wheel color is selected. The Electrostatic Powder Spraying Machine is used for application, ensuring the coating adheres uniformly to the wheel surface, preventing runs or bubbles, and improving paint adhesion. During spraying, the powder recovery system recycles excess non-adhered powder, saving material and enhancing environmental protection. If liquid paint is used, the application must follow the "primer + color coat" logic to ensure rich, uniform color saturation.

Step Seven: Curing — Coating Hardening Assurance

The core objective of curing is to completely solidify the applied coating, enhancing the hardness, adhesion, and durability of the paint or powder layer. This ensures the coated wheel can withstand long-term environmental erosion and prevents coating failure or fading.

The coated wheel is placed in a professional curing oven or baking oven for heat curing. Based on the coating type and thickness, corresponding curing temperature (typically 150-200°C) and time (20-30 minutes) are set. Some advanced curing equipment features intelligent temperature control that automatically adjusts parameters based on the wheel material and coating type, ensuring uniform and stable curing results. After curing, the wheel must be allowed to cool naturally to room temperature to prevent damage to the coating if touched while hot.

Step Eight: Tire Installation and Dynamic Balancing — Final Vehicle Adaptation

Tire installation and dynamic balancing conclude the entire repair process. The main goal is to reassemble the repaired wheel and tire and adjust the dynamic balance to ensure smooth and safe driving upon reinstallation. This step directly determines the post-repair user experience. If dynamic balancing is insufficient, the vehicle will experience vibration and noise while driving.

The process involves two core steps: First, tire installation, using a professional tire changer to accurately mount the tire onto the repaired wheel. Attention must be paid to the tire's rotation direction, ensuring the valve stem aligns with the wheel's designated hole, and preventing damage to the tire or wheel edge during installation. Second, dynamic balancing, where the mounted wheel and tire assembly is placed on a Tire Balancer. The equipment detects the dynamic balance parameters. Based on the results, balance weights are added to the wheel edge until the dynamic balance meets the standard. The standard for achieving dynamic balance is: the imbalance on both sides of the wheel-tire assembly is controlled within the allowable range during high-speed rotation, ensuring a vibration-free drive.

Process Summary: Equipment Empowerment and Standardization for Professional Repair Quality

The entire Gubot wheel repair process is fundamentally a standardized system covering the full link: structural detection and repair → surface aesthetic renewal → reinstallation and adaptation assurance. From initial damage assessment to final dynamic balancing, every step is supported by clear operational standards and exclusive professional equipment.

The synergy of equipment—including the Tire Changer, Dry Sandblast Machine, Wheel Straightening Machine, Aluminum Welder, CNC Wheel Diamond Cut Machine, Electrostatic Powder Spraying Machine, Curing Oven, and Tire Balancer—reduces reliance on manual dexterity while guaranteeing consistent repair quality. Furthermore, the standardized process design makes the repair repeatable and traceable, allowing new technicians to master it quickly without relying heavily on the experience of senior technicians.

For auto repair shops, adopting this Gubot "Equipment + Process" dual-driven wheel repair system not only consistently delivers high-quality results, improving customer satisfaction and reputation, but also boosts operational efficiency, reduces labor costs and rework rates, and builds core competitiveness in the lucrative wheel repair sector. Professional wheel repair requires both technical expertise and the powerful combination of standardized processes and high-quality equipment, which is the core reason for Gubot’s industry recognition.