Dongguan Sinbo Precision High-Precision Flange Parts Machining Case Display​

Dongguan Sinbo Precision Flange Parts Machining Case​

In the manufacturing industry, flange parts are crucial connecting components in various mechanical equipment, and their machining quality directly affects the overall performance and stability of the equipment. Dongguan Sinbo Precision, a high-tech enterprise dedicated to precision parts manufacturing, has demonstrated outstanding technical strength and rich experience in flange parts machining.​

I. Company Background​

Dongguan Sinbo Precision was founded in 2013, with a modern factory covering an area of 34,000 square meters, more than 600 professional employees, and nearly 500 imported processing and inspection equipments. With a design and manufacturing team having over 13 years of experience, the company is committed to providing high-quality and customized precision parts solutions for global customers.​

II. Machining Requirement Analysis​

The customer put forward strict requirements for this batch of flange parts. In terms of accuracy, the tolerance of key dimensions needs to be controlled within a very small range. For example, the diameter tolerance of the outer circle is required to be ±0.01mm, and the cylindricity error of the inner hole should not exceed 0.005mm. In terms of surface quality, the surface roughness Ra of the machined surface is required to be below 0.8μm to ensure good sealing performance and connection reliability. At the same time, in terms of material selection, high-strength alloy steel was chosen. Although this material has excellent mechanical properties, it is more difficult to machine, posing higher challenges to the machining process and tools.​

III. Machining Process Formulation​

• Blank Preparation: According to the structure and size of the parts, forging process was adopted to prepare the blanks. Forging can effectively improve the internal structure of the material and enhance the strength and toughness of the parts. After careful calculation and simulation, a reasonable forging ratio was determined to ensure the quality of the blank and minimize the subsequent machining allowance.​
• Rough Machining Stage: Advanced CNC lathes were used for rough turning of the outer circle and inner hole. To improve machining efficiency, large cutting depth and feed rate were selected, but at the same time, the cutting parameters were strictly controlled to avoid part deformation caused by excessive cutting force. After rough turning, an appropriate machining allowance was reserved for the subsequent finishing stage.​
• Finishing Stage: Based on rough machining, high-precision CNC grinding machines were used to grind the key dimensions. During the grinding process, an on-line detection system was used to monitor the dimensional accuracy in real-time, ensuring that each machined dimension can accurately meet the design requirements. For the sealing surface of the flange, the lapping process was adopted to further reduce the surface roughness and improve the sealing performance.​
• Hole System Machining: For the multiple connecting holes on the flange, CNC drilling machines and boring machines were used for machining. Through advanced tool path planning and high-precision positioning systems, the position accuracy and dimensional accuracy of the holes were ensured, and the position deviation between each hole was controlled within ±0.02mm.​

IV. Quality Control Measures​

• Equipment Calibration: All processing and inspection equipments are regularly calibrated and maintained to ensure their high-precision operation. For example, the positioning accuracy of the CNC lathe is calibrated once a month, and the measurement accuracy of the inspection equipment is calibrated once a quarter.​
• Process Inspection: During the machining process, multiple quality inspection points are set up to detect the key dimensions and surface quality in real-time. A coordinate measuring machine is used to spot-check the machined surface. Once the dimensional deviation exceeds the allowable range, the machining parameters are immediately adjusted or corrective measures are taken.​
• Finished Product Inspection: After the parts are machined, a comprehensive finished product inspection is carried out. Not only are the dimensional accuracy and surface quality strictly inspected, but also the physical and chemical properties such as hardness and metallographic structure of the parts are tested to ensure that the product quality fully meets the customer's requirements.​

V. Machining Results Display​

Through the unremitting efforts of the Dongguan Sinbo Precision team, this flange parts machining project has achieved complete success. The machined flange parts have met or even exceeded the customer's expectations in terms of accuracy, surface quality, and mechanical properties. The customer highly appraised the product quality and established a long-term and stable cooperative relationship with the company.​

VI. Summary and Prospect​

This flange parts machining case fully demonstrates the strong technical strength and professional service capabilities of Dongguan Sinbo Precision in the field of precision parts machining. The company will continue to adhere to the business philosophy of "striving for excellence and customer first", continuously introduce advanced technologies and equipments, improve the professional quality of the team, provide more high-quality and efficient precision parts machining solutions for global customers, and contribute to the high-quality development of the manufacturing industry.​