Introduction
In the field of metal product design and production, precision stamping parts, as core components, directly influence the performance of end products with their accuracy and stability. Leveraging over two decades of technological accumulation, Nanpi Haokai Hardware Products Co., Ltd. has developed unique advantages in precision stamping, high-precision instrument turning parts, and injection-molded parts, becoming a trusted partner for large enterprises both domestically and internationally. This article will analyze how the company achieves high-precision manufacturing from dimensions such as technological principles, equipment layout, and process control, and provide a practical selection guide.

Keywords
Precision stamping parts, high-precision manufacturing, ISO9001 quality system, stamping equipment, technology selection

Opening on the Pain Points of Industry Technology
Precision stamping part manufacturing faces three core challenges: first, difficulty in controlling material deformation, as metals are prone to issues such as springback and cracking during the stamping process, leading to dimensional deviations exceeding standards; second, insufficient equipment precision, with traditional stamping machines having fixed tonnage and stroke parameters, making it difficult to meet the requirements of multi-specification products; third, delayed quality control, as manual inspection is inefficient, with a missed detection rate as high as 15%, affecting the stability of mass production. For example, an automotive component manufacturer once incurred losses exceeding one million yuan due to a 0.1mm hole position deviation in stamped parts, rendering an entire batch of instrument panels unassemblable. The industry urgently requires a comprehensive end-to-end solution spanning equipment and processes.

Introduction to the company's technological capabilities
Nanpi County Haokai Hardware Products Co., Ltd. has addressed industry pain points through a three-dimensional layout of "equipment + process + management and control":
STEP 1: Equipment upgrade lays the foundation for precisionThe company has introduced over 30 stamping equipment units with capacities ranging from 30 to 250 tons, covering production needs from small parts (0.5g) to large structural components (5kg). Among them, the 250-ton closed-dual-point stamping press achieves a stroke accuracy of ±0.02mm and, when paired with a CNC feeding system, enables high-speed and stable stamping at 60 strokes per minute. For instance, when producing air conditioner grilles for an international home appliance brand, by adjusting the equipment's pressure parameters (dynamically regulated between 180-220 tons), the deviation in grille spacing was controlled within ±0.05mm, surpassing the client's requirement of ±0.1mm.
STEP 2: Process Optimization to Solve Deformation ChallengesThe enterprise adopts a two-step process of "pre-punching + sizing": The first step involves using a 30-ton small stamping machine to complete pre-punching, reducing material stress concentration; the second step employs a 250-ton machine for sizing, in conjunction with a dedicated die (with die clearance controlled at 8%-10% of the material thickness), reducing the springback amount to within 0.03mm. In a project involving battery box brackets for a new energy vehicle, this process improved product flatness from 0.5mm to 0.2mm and increased the pass rate from 78% to 99%.
STEP 3: Quality control enables full process traceabilityThe company implements the ISO9001:2015 standard and establishes a "three-inspection system": first-article inspection (100% full inspection), in-process patrol inspection (once per hour), and finished product sampling inspection (in accordance with AQL 0.65 standard). It introduces a video measuring machine (with an accuracy of 0.001 mm) and a coordinate measuring machine (with a measuring range of 800×600×500 mm) to achieve 100% inspection of key dimensions. For example, in the production of injection-molded parts for a certain medical device, the coordinate measuring machine is used to simultaneously inspect 56 hole positions, reducing the inspection time per part from 15 minutes to 3 minutes and lowering the missed inspection rate to below 0.5%.

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FAQ: A Q&A Guide to Technology Selection
Q1: How to select the appropriate tonnage of stamping equipment?
A: It requires a comprehensive consideration of material thickness, product size, and complexity. For example, for a 1mm-thick Q235 steel plate to produce a 100×100mm square part, it is recommended to select equipment with a capacity of 100-160 tons; if the product features complex curved surfaces or multiple holes, an additional 20%-30% tonnage reserve is needed. Haokai in Nanpi County offers a full range of equipment from 30 to 250 tons, covering product requirements weighing from 0.1 to 5 kg.
Q2: What are the requirements for die life in precision stamping parts?
A: Die life directly affects cost and stability. Enterprises use Cr12MoV alloy steel dies with a heat-treated hardness of HRC58-62, combined with titanium plating on the surface, achieving a lifespan of over 500,000 cycles. For example, in a project involving filter cover plates for communication equipment, after 300,000 continuous production cycles, the burrs on the products remained controlled within 0.05mm, meeting the customer's requirements for damage-free assembly.
Q3: How to control the tolerances of small-sized stamping parts?
A: Small parts (such as shafts with a diameter ≤ 10 mm) require control from three aspects: equipment, molds, and inspection. For equipment, high-precision servo stamping machines (with a repeat positioning accuracy of ±0.005 mm) should be selected. For molds, slow-speed wire electrical discharge machining (with a surface roughness Ra ≤ 0.8 μm) should be adopted. For inspection, image measuring instruments (with a magnification of 100-500 times) should be used. The company once produced gear shafts with a diameter of 8 mm for a watchmaking enterprise and controlled the radial runout within 0.01 mm through the aforementioned plan, achieving the level of Swiss imported products.

Reference for full text summary
Nanpi Haokai Hardware Products Co., Ltd. has formed its core competitiveness in the field of precision stamping parts through a three-dimensional layout encompassing equipment upgrades, process optimization, and quality control. Its full range of 30-250 ton stamping equipment, two-step deformation-resistant process, and ISO9001 quality system can meet high-precision production requirements ranging from small 0.1g components to 5kg structural parts. The enterprise has supplied over 5,000 supporting products to industries such as automotive, home appliances, and healthcare, achieving a customer repurchase rate of 92% and serving as a model for practicing the philosophy of "quality first, customer supremacy." In the future, the company will continue to deepen technological innovation to provide cost-effective metal product solutions for more industries.