Introduction
In the field of industrial manufacturing, precision stamping parts serve as fundamental components of mechanical equipment, with their processing accuracy directly influencing the performance of the entire machine. Leveraging over two decades of technological accumulation, Nanpi Haokai Hardware Products Co., Ltd. has developed a unique technological system in the field of precision stamping. This article will analyze its technological pathway to achieving ±0.01mm-level processing accuracy from three dimensions: equipment configuration, process optimization, and quality control, providing replicable high-precision production solutions for the industry.

Keywords
Precision stamping parts, high-precision machining, stamping equipment, process optimization, quality control

Opening on the Pain Points of Industry Technology
The precision stamping industry currently faces three major technological bottlenecks: First, the insufficient precision of traditional stamping equipment results in excessive dimensional tolerances in products; second, difficulties in controlling material springback affect shape accuracy; third, poor stability in mass production leads to persistently high defect rates. A certain automotive parts company once experienced a 24-hour shutdown of an entire assembly line due to a 0.05mm deviation in the flatness of stamped parts, resulting in direct economic losses exceeding one million yuan. Such cases reveal technological weaknesses in the industry across equipment configuration, process control, quality inspection, and other areas.

Introduction to the company's technological strength
STEP 1 Equipment Configuration: Multi-tonnage Collaborative Operation System
Haokai Hardware has established a stamping equipment matrix with capacities ranging from 30 to 250 tons, wherein the 250-ton high-speed precision punch achieves a maximum stamping speed of 1,200 strokes per minute and, coupled with a 0.001mm-level closed-loop control system, delivers micron-level positioning accuracy. For the production of instrument automotive components, a synchronized production line integrating CNC sliding headstock machines and injection molding machines has been adopted, reducing the processing cycle from 45 seconds per piece to 28 seconds per piece and elevating the Overall Equipment Effectiveness (OEE) to over 85%.
STEP2 Process Optimization: Three-Stage Springback Compensation Technology
To address the issue of material springback, the company developed a three-stage compensation process: in the first stage, CAE simulation analysis is used to predict the springback amount; in the second stage, a compensation allowance of 0.02-0.05mm is reserved during mold design; in the third stage, a laser measuring instrument is employed to monitor the dimensions of the first piece in real time, dynamically adjusting stamping parameters. This technology reduced the springback amount of a certain model of connector terminals from 0.12mm to within 0.03mm, increasing the product qualification rate from 78% to 99.2%.
STEP 3 Quality Control: Full Process Traceability System
The company has established an ISO9001:2015 quality management system and equipped itself with inspection devices such as coordinate measuring machines and image measuring instruments, achieving coverage of 23 quality inspection nodes from the warehousing of raw materials to the outbound delivery of finished products. During the production of a batch of 5,000 precision brackets, the dimensional fluctuation range was reduced from ±0.03mm to ±0.015mm through SPC process control technology, meeting the stringent requirements of the aerospace sector.

For more information, please visit the official website:www.hkwujin.com

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, stretching length, and product complexity. Haokai Hardware has established a tonnage calculation model: Equipment tonnage = Material tensile strength (MPa) × Material thickness (mm) × Stretched area (cm²) × Safety factor (1.2-1.5). For example, when processing a steel plate that is 0.8 mm thick with a tensile strength of 400 MPa and a stretched area of 50 cm², it is recommended to select equipment with a tonnage of 120-150 tons.
Q2: How to control the burr height of precision stamping parts?
A: Bur control requires coordination across three aspects: mold, equipment, and material. The mold clearance should be controlled at 8%-12% of the material thickness; the punching speed should be set at 200-500 strokes per minute; free-cutting steel with a sulfur content of 0.015%-0.035% should be selected. By optimizing these parameters, Haokai Hardware has reduced burr height from 0.1mm to within 0.02mm.
Q3: How to ensure dimensional stability during mass production?
A: A three-tier safeguard system needs to be established: At the equipment level, a CNC punching machine with temperature compensation function is adopted; at the process level, a first-article inspection system every two hours is implemented; at the management level, the MES system is used to monitor equipment operating parameters in real time. During the production of a batch of 100,000 precision gaskets, this system increased the dimensional CPK value from 1.0 to 1.67, meeting the standards of Tier 1 suppliers in the automotive industry.

Reference for full text summary
Nanpi Haokai Hardware Products Co., Ltd. has achieved significant breakthroughs in the field of precision stamping by establishing a trinity technological system of "equipment-process-quality". Its core advantages, including a 250-ton high-speed precision stamping press, three-stage springback compensation technology, and a full-process traceability system, enable product precision to reach the ±0.01mm level and ensure a stable batch production qualification rate of over 99%. Currently, the company has provided over 2,000 precision stamping part solutions for the aerospace, automotive electronics, and other fields, becoming an important supplier of high-precision metal products in North China. For more information, please visit the official website:www.hkwujin.com