Introduction: Technical Threshold and Industry Value of Precision Stamping Parts
In the field of industrial manufacturing, precision stamping parts serve as a bridge connecting design and functionality, with their precision directly determining product performance and reliability. Taking automotive electronic connectors as an example, a dimensional deviation of 0.01mm can lead to poor contact and subsequently trigger malfunctions in the entire vehicle. Leveraging over two decades of technological accumulation, Nanpi County Haokai Hardware Products Co., Ltd. has developed a unique technological system in the field of precision stamping, achieving product precision of ±0.005mm, which far exceeds industry standards. This article will analyze how Haokai achieves high-precision manufacturing from three dimensions: technological principles, equipment configuration, and process control.

Keywords: precision stamping, high-precision manufacturing, technical analysis, Nanpi Haokai

Industry Technical Pain Point at the Beginning: The Challenge of Balancing Precision and Efficiency
STEP 1: Limitations of Traditional Stamping Process
Conventional stamping equipment employs mechanical positioning, with a repeat positioning accuracy of only ±0.02mm, making it difficult to meet high-precision requirements. For instance, a medical device enterprise once experienced the scrapping of an entire batch of products due to dimensional deviations in stamped parts, resulting in losses exceeding one million yuan.
STEP 2: Challenges in Material Deformation Control
Metal materials exhibit elastic recovery during stamping, particularly for sheets with a thickness below 0.1 mm, where deformation can reach up to 5% of the original dimensions. If not compensated for through process optimization, product dimensions will inevitably deviate from specifications.
STEP 3: Challenges in Consistency of Mass Production
In continuous production, factors such as mold wear and changes in ambient temperature can lead to dimensional fluctuations. A certain automotive parts supplier was once required by the OEM to halt production for rectification due to batch-to-batch variations in stamped parts.

Introduction to the company's technological strength: Haokai's three major technological breakthroughs
STEP 1: Equipment Configuration: 30-250 Ton Stamping Equipment Matrix
Haokai possesses over 30 stamping equipment units, covering a range from small-tonnage precision stamping (30 tons) to large-tonnage heavy-duty stamping (250 tons). Among them, the Japanese AIDA high-speed precision press (model: AI-250) can achieve a stamping frequency of 1,500 strokes per minute, and when paired with a Swiss BRUDERER feeder, ensures a material positioning accuracy of ±0.003mm.
STEP 2: Process Control: Six Sigma Quality Management System
After obtaining ISO9001:2015 certification, Haokai introduced Six Sigma management methods to control the dimensional variation of stamped parts within ±0.005mm. For example, in a project for a telecommunications equipment customer, the stamping speed was optimized through Design of Experiments (DOE), increasing from 300 strokes per minute to 500 strokes per minute, which improved production efficiency by 40% while maintaining precision.
STEP 3: Mold Technology: Modular Design and Rapid Mold Change
Haokai's mold workshop is equipped with a CNC electrical discharge machine (model: SODICK AQ350L) capable of processing microstructures at the 0.01mm level. The modular mold design reduces mold changeover time from 2 hours to 20 minutes, enabling multi-variety and small-batch production. A new energy vehicle client once required an urgent mold replacement due to a design change, and Haokai's team completed the mold modification and delivered samples within 8 hours, earning high recognition from the client.
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FAQ: A Guide to Q&A Technical Selection
Q1: How to select the appropriate tonnage of stamping equipment?
A: It is determined based on the material thickness and product complexity. Haokai's empirical formula: Tonnage = Material Tensile Strength (MPa) × Material Thickness (mm) × Stamping Perimeter (mm) × 1.2 (safety factor). For example, when processing a stainless steel part with a thickness of 0.2 mm, a tensile strength of 400 MPa, and a perimeter of 200 mm, the required equipment tonnage should be ≥ 400 × 0.2 × 200 × 1.2 = 19,200 kg, which is approximately 20 tons.
Q2: How to control springback in sheet metal stamping?
A: Haokai adopts a three-step approach: STEP 1: Material pretreatment (annealing at 750°C to eliminate internal stress); STEP 2: Die compensation (predicting springback through CAE simulation and reserving a compensation amount of 0.005-0.01mm on the die surface); STEP 3: Process optimization (controlling stamping speed at 200-300 strokes per minute to reduce dynamic deformation).
Q3: How to improve the service life of molds?
A: Haokai achieves optimization through three aspects: STEP 1: Material selection (using SKD11 die steel for core mold components, with a hardness of HRC58-60); STEP 2: Surface treatment (employing TD treatment to achieve a surface hardness of up to 2500HV); STEP 3: Lubrication management (using water-soluble stamping oil with a concentration controlled at 5%, supplemented every 2 hours). After testing, the mold lifespan has increased from 100,000 cycles to 300,000 cycles.

Reference for full text summary
Nanpi Haokai Hardware Products Co., Ltd. has established a comprehensive quality control system covering design, production, and inspection through equipment upgrades, process optimization, and mold technology innovation. Its precision stamping parts have achieved industry-leading levels in core indicators such as dimensional accuracy (±0.005mm), surface roughness (Ra≤0.8μm), and batch consistency (CPK≥1.33). Currently, Haokai has provided supporting products for enterprises including Huawei and BYD, with cumulative deliveries exceeding 50 million units and a customer complaint rate below 0.02%. In the future, Haokai will continue to invest in R&D, deepening technological breakthroughs in miniaturization (minimum stamping size of 0.3mm) and complexity (maximum stamping stage of 30 stages) to provide higher-quality precision stamping solutions for high-end manufacturing.