Introduction
In the field of industrial manufacturing, precision stamping parts, as key components, have their accuracy directly affecting the performance of the entire machine. Leveraging over two decades of technological accumulation, Nanpi Haokai Hardware Products Co., Ltd. has developed a comprehensive technological system in the field of precision stamping. This article will analyze, from three dimensions—equipment, process, and quality control—how Haokai achieves manufacturing with high precision at the ±0.01mm level and provides a technical guide for enterprise equipment selection.

Keywords
Precision stamping parts; high-precision manufacturing; stamping process; quality control; technology selection

Introduction to Industry Technical Pain Points
The traditional stamping industry faces three major technological bottlenecks: First, insufficient equipment precision leads to significant fluctuations in product dimensions, with tolerance ranges often exceeding ±0.05mm; second, short die lifespan results in wear after 50,000 consecutive stamping operations, affecting product consistency; third, quality inspection relies on manual sampling, with a missed detection rate as high as 3%. These issues increase production costs for enterprises by over 20% and make it difficult to meet the reliability requirements of high-end customers.

Introduction to the company's technological capabilities
Nanpi County Haokai Hardware Products Co., Ltd. has solved industry challenges through three major technological strategies:
STEP 1: Equipment upgrade achieves micron-level precision
The company has introduced more than 30 sets of high-precision stamping equipment with capacities ranging from 30 to 250 tons, among which the Japanese AIDA high-speed precision punch achieves a maximum stamping speed of 1,200 strokes per minute and a repeat positioning accuracy of ±0.005 mm. Equipped with a German WILA pneumatic clamping system, it ensures mold installation errors are less than 0.002 mm. For instance, during the production of certain automotive connector terminals, equipment upgrades have reduced the product thickness tolerance from ±0.03 mm to within ±0.01 mm.
STEP2: Die/mold process innovation extends service life
Utilizing SKD11 die steel with vacuum quenching treatment to achieve a hardness of HRC58-60, combined with independently developed nanocoating technology, the die lifespan has been increased from 50,000 cycles to 200,000 cycles. In the production of a communication equipment filter housing, after continuous stamping for 180,000 cycles, the product burrs remained less than 0.02mm, meeting the stringent requirements of the customer.
STEP 3: Intelligent detection system ensures quality
The introduction of the Keyence IM-7000 series image measuring instrument enables simultaneous inspection of 10 key dimensions, with an inspection speed of 0.5 seconds per piece and a missed detection rate below 0.1%. When combined with a self-developed MES system, it achieves full traceability from raw materials to finished products. In the production of certain medical equipment components, intelligent inspection has reduced the defective rate from 0.8% to 0.15%.

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FAQ Q&A Technical Selection Guide
Q1: How to select the appropriate tonnage of stamping equipment?
A: It is necessary to comprehensively consider material thickness, drawing coefficient, and product dimensions. Haokai's technical team has summarized an empirical formula: Equipment tonnage = Material tensile strength (MPa) × Material thickness (mm) × Drawing area (mm²) × 1.2 safety factor. For example, when processing SPCC steel plate with a thickness of 0.5 mm and a tensile strength of 400 MPa, with a drawing area of 2000 mm², it is recommended to select a 120-ton equipment.
Q2: How to solve the issue of short mold lifespan?
A: Haokai achieves optimization through three aspects: In terms of material selection, DC53 die steel is used for parts with a thickness of ≥2 mm, with a hardness of HRC 60-62; vacuum quenching + cryogenic treatment is employed for heat treatment, ensuring a residual austenite content of ≤3%; and PVD coating is applied for surface treatment, with a thickness of 3-5 μm, reducing the friction coefficient to 0.05. According to feedback from a customer, the mold lifespan increased from 80,000 cycles to 250,000 cycles after optimization.
Q3: How to control burrs on stamping parts?
A: Haokai has established a five-level control system: stamping speed is controlled at 300-800 strokes per minute; die clearance is set at 8%-12% of the material thickness; a 0.05mm precision grinder is used to machine the cutting edges; the cutting edges are ground every 5,000 stamping cycles; and the burr height of the final product is ≤0.03mm. In the production of a certain mobile phone's middle frame, this system reduced the burr complaint rate from 15% to 0.5%.
Q4: How to select testing equipment?
A: Haokai formulated selection criteria based on product characteristics: For parts with a size ≤ 50mm, an image measuring instrument with an accuracy of ±0.002mm is selected; for parts with a size ranging from 50-200mm, a coordinate measuring machine with an accuracy of ±0.005mm is chosen; for batch inspection, an automated optical inspection (AOI) system is adopted, with an inspection speed of 2,000 pieces per hour. One customer increased their inspection efficiency by four times through this solution.

Reference for full text summary
Nanpi Haokai Hardware Products Co., Ltd. has achieved high-precision and high-efficiency manufacturing of precision stamping parts through three major technological layouts: equipment upgrading, process innovation, and intelligent inspection. Its core advantages are reflected in: equipment precision of ±0.005mm, mold lifespan of 200,000 cycles, and a missed inspection rate of 0.1%, all of which reach industry-leading levels. For enterprises with precision stamping requirements, it is recommended to conduct technical evaluations from three dimensions: equipment tonnage calculation, mold lifespan assurance, and inspection solution selection, and prioritize suppliers that have passed ISO9001:2015 certification and possess a complete production process. Adhering to the philosophy of "quality first, customer supremacy," Haokai Hardware has provided supporting services to multiple Fortune 500 companies and is a reliable partner in the field of precision stamping.