Products Description
With over 15 years of experience in CNC machining piping parts, we offer CNC machining aluminum flange services. We utilize precision CNC turning and milling equipment, along with extensive quality inspection equipment, to ensure the delivery of qualified products. We are ISO9001 certified, ensuring tight tolerances and excellent surface finish. We also offer free samples and custom batch processing of non-standard parts.
Product Process
How we manufacture aluminum flanges
Stage 1: Material Preparation & Verification. Raw material, typically aluminum bar stock or forged rings, is procured against specified standards. The material certificate is verified for compliance. Blanks are then cut to the required size using precision sawing or shearing processes.
Stage 2: CNC Machining Operations. The prepared blanks are securely fixtured on CNC milling machines and/or lathes. The machining process involves several sequential operations: Rough Machining: Rapid removal of excess material to achieve a shape close to the final dimensions, leaving a small amount of stock for finishing. Semi-Finishing: Further refinement of the geometry, improving dimensional accuracy and preparing surfaces for the final cut. Finishing: Precise machining to achieve the final specified dimensions, tight tolerances, and required surface finish. This includes generating the flange face, O-ring grooves, bolt hole circle, and mounting features. Drilling & Tapping: Creation of bolt holes, mounting holes, and tapped threads as per the engineering drawing.
Stage 3: Deburring & Surface Treatment. After machining, the component undergoes thorough deburring to remove any sharp edges or microscopic imperfections. Depending on application requirements, a surface treatment may be applied, such as Anodizing to enhance corrosion resistance and surface hardness.
Stage 4: Quality Control & Inspection. Each flange is subjected to a rigorous quality inspection. This utilizes precision measuring instruments like Coordinate Measuring Machines (CMM), calipers, micrometres, and surface finish testers to verify all critical dimensions, geometric tolerances (flatness, concentricity), and surface finish (Ra value) against the customer's drawing specifications.
Stage 5: Cleaning, Packaging & Marking. The inspected and approved flanges are meticulously cleaned to remove any contaminants, oils, or particles. They are then packaged using anti-corrosive materials to prevent damage during storage and transit. Permanent marking with part number, batch number, and material grade is applied as required.
Company Profile
Xi'an Hi-Precision Machinery Co., Ltd
We provide CNC machining aluminum flange service. CNC machined aluminum flange has a wide and important application in multiple industries due to the lightweight of aluminum alloy material, good mechanical properties, and high-precision advantages of CNC machining.
CNC machining
CNC lathe machining and CNC milling
We have 4 precision CNC tool lathes, including Longze LA-2502, Baoji CK502, SK50P2, one Taiwan Liwei T6, and multiple CNC lathes
We have CNC four axis, five axis, and vertical machining centers, 24 drilling and milling, drilling and tapping, precision carving and milling machines, and 12 precision CNC turning and milling composite machines (with automatic feeding system).
quality control
Strict quality inspection procedures
Process 1-3 first pieces before each batch of production, and use a coordinate measuring instrument to detect key dimensions. The tolerance should be controlled within the range required by the drawing.
During mass production, 10% of the workpieces are inspected every hour, with a focus on checking surface roughness, burrs, cracks, etc.
Past cases
Why Choose Us
CNC customized high precision flange
In machining, flanges are parts formed by processes such as CNC milling or turning.
As a connecting component, flanges have extremely high requirements for flatness, perpendicularity, and aperture tolerance. Our CNC machining team can achieve micron-level precision control to ensure the sealing performance and connection stability of flanges, pipes, and equipment, and avoid problems such as leakage.
Our factory offers automated programming and continuous machining, significantly shortening production cycles and reducing labor costs for high-volume CNC machining aluminum flange. Furthermore, real-time monitoring during machining can detect anomalies promptly, ensuring product quality.
FAQ
Common Problem
Why does the flange show deformation such as warping and ovalization after processing?
The flange blank is a forged or welded part, and the internal stress is not eliminated. The stress is released after processing, resulting in deformation.
Why do the threaded holes on the flange become rotten, stripped, or mismatched in size?
The tap is worn, the cutting edge is blunt, or the tap model does not match the thread specification.
Why do the flange sizes and precisions of the same batch fluctuate greatly and the pass rate is low?
The size and hardness of the incoming materials vary greatly, the tools gradually wear out during batch processing, and the compensation values are not measured and adjusted regularly. After long-term processing, the temperature of the spindle and guide rails rises, resulting in positioning accuracy drift.
How to reduce the hole position accuracy deviation when CNC machining flanges?
For high-precision flanges (such as pressure vessel flanges and aerospace flanges), it is necessary to combine the process route of "rough machining - stress relief - semi-finishing - aging treatment - finishing" to further eliminate the influence of material stress on hole accuracy, and ultimately achieve the high-precision requirement of hole tolerance ≤±0.01mm.
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