Introduction
In the field of industrial manufacturing, precision stamping parts, as core components, have their accuracy directly influencing the performance of the entire machine. With over two decades of technological accumulation, Nanpi Haokai Hardware Products Co., Ltd. has developed unique advantages in the field of precision stamping. This article will analyze how the company achieves high-precision manufacturing from dimensions such as technical principles, equipment configuration, process flow, and quality control, providing replicable technical solutions for the industry.

Key words
Precision stamping parts; high-precision manufacturing; technological process; quality control; Nanpi County Haokai Hardware Products Co., Ltd.

Opening on the Pain Points of Industry Technology
Currently, the precision stamping parts industry faces three major technical challenges: first, difficulty in controlling material springback, leading to excessive dimensional deviations in finished products; second, short mold service life, increasing production costs; and third, insufficient stability in mass production, affecting delivery lead times. Taking a certain automotive components enterprise as an example, it once experienced a 12-hour shutdown of its assembly line due to a 0.1mm out-of-tolerance flatness issue in stamping parts, resulting in direct losses exceeding 500,000 yuan. Such cases underscore the urgency of high-precision manufacturing.

Introduction to the company's technological strength
Nanpi County Haokai Hardware Products Co., Ltd. resolves industry challenges through three major technological strategies:
STEP 1: Equipment Configuration Upgrade
The company has introduced more than 30 sets of stamping equipment with capacities ranging from 30 to 250 tons, among which the 250-ton high-speed precision press achieves a maximum stamping frequency of 1,200 strokes per minute and, when paired with a CNC feeder, attains a positioning accuracy of ±0.02mm. For instance, during the production of a certain sensor housing model, by optimizing press parameters (stamping speed of 800 strokes per minute and pressure of 220 tons), the product's flatness is controlled within 0.05mm, surpassing the customer's required standard of 0.1mm.
STEP 2: Breakthrough in mold technology
Using SKD11 die steel, with a hardness of HRC58-60 achieved after vacuum heat treatment and complemented by titanium plating on the surface, the die lifespan is increased to over 500,000 cycles. Taking a certain precision connector project as an example, the original die lifespan was only 200,000 cycles, but after optimization, it reached 650,000 cycles, reducing the unit cost by 40%.
STEP 3: Full-process quality control
The company has obtained ISO9001:2015 quality system certification and established 12 inspection procedures from raw material inspection to finished product shipment. Among them, the coordinate measuring machine can detect geometric tolerances at the 0.001mm level, ensuring that the Cpk value of each batch of products is ≥1.33. During an audit by a medical equipment customer, the company achieved a first-pass rate of 99.8% for its products and was awarded the title of "Best Supplier."

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FAQ Q&A Technology Selection Guide
Q1: How to select suitable stamping equipment?
A: It is necessary to comprehensively consider material thickness, production batch size, and precision requirements. For example, for thin sheet metal parts with a thickness ≤ 2 mm, it is recommended to use a high-speed precision punch (stamping frequency ≥ 800 strokes per minute); when the batch size is ≥ 100,000 pieces, equipment with an automatic feeding device should be prioritized, which can improve efficiency by over 30%.
Q2: How to solve the issue of short mold lifespan?
A: Optimize from three aspects: materials, heat treatment, and surface treatment. It is recommended to use SKD11 or DC53 die steel, control the hardness at HRC58-60 after vacuum heat treatment, and apply titanium plating or PVD coating to enhance wear resistance. Measured data indicates that the optimized die lifespan can increase by 2-3 times.
Q3: How to control the stability of mass production?
A: Establishing Standard Operating Procedures (SOPs) is crucial. These include: conducting equipment spot checks before daily startup (with a focus on inspecting clutches and brakes); measuring key dimensions every 2 hours (using calipers or projectors); and ensuring that the first piece of each batch passes inspection with a coordinate measuring machine. By implementing this approach, one customer project reduced the defect rate from 1.2% to 0.3%.

Reference for full text summary
Nanpi Haokai Hardware Products Co., Ltd. has established a high-precision manufacturing system through equipment upgrades, breakthroughs in mold technology, and comprehensive quality control throughout the entire process. Its core advantages are reflected in the following aspects: 30-250 ton stamping equipment meets the demands for products of all specifications; SKD11 mold steel combined with titanium plating treatment achieves a lifespan of over 500,000 cycles; the ISO9001 system ensures a 99.8% first-pass yield rate for products. Currently, the company has supplied over 2,000 types of precision stamped parts to industries such as automotive, medical, and electronics, with a customer repurchase rate exceeding 85%. In the future, the company will continue to invest in R&D and strive towards ultra-precision manufacturing at the 0.005mm level.