High Precision Stamping parts

　　High Precision Stamping Parts

　　What is High Precision Stamping?

　　High Precision Stamping is a high-end metal forming technology relying on ultra-precision processing equipment, customized precision molds, and closed-loop process control, specifically designed to produce components with minimal tolerances, excellent dimensional consistency, and superior surface quality. By precisely controlling the entire stamping process (materials, equipment, molds, process parameters), it processes metal sheets with a thickness of 0.05mm-8mm into complex or simple structural parts. Its core characteristics are dimensional tolerances of ±0.001mm-±0.02mm, surface roughness of Ra≤0.1μm, and inter-part dimensional deviation of ≤0.01mm, which can largely replace precision machining and achieve the perfect unification of high-efficiency mass production and high precision.

　　Compared with ordinary stamping, the core difference of high precision stamping lies in "full-process precision"—from mold processing accuracy (micron level), equipment positioning accuracy (±0.001mm) to real-time regulation of process parameters, all centered on the core goal of "extreme dimensional stability". It is a key forming solution for precision components in high-end manufacturing.

　　How It Works

　　The core of high precision stamping is to achieve precise plastic deformation of materials through "full-chain precision control". The key processes and control points are as follows:

　　Precision Preparation Stage: Select high-precision metal sheets with uniform grains and low impurity content (such as precision cold-rolled steel, ultra-thin stainless steel strips), and perform laser cutting, vacuum leveling, and oil-free cleaning to ensure the sheet flatness error is ≤0.005mm/m, avoiding material defects affecting forming accuracy.

　　Precise Positioning and Clamping: Use a servo feeder (feeding accuracy ±0.003mm) combined with a grating ruler positioning system to accurately feed the sheet into the mold; the blank holder applies uniform and adjustable pressure (0.5-5MPa) to prevent wrinkling while ensuring smooth material flow.

　　Closed-Loop Process Forming: Perform stamping processes with a high-speed precision punch press (stamping speed 100-800 times/minute). The equipment is equipped with a force feedback and displacement monitoring system to real-time adjust stamping pressure, speed, and mold clearance (usually 1.02-1.08 times the material thickness); complex parts adopt multi-pass progressive forming, with online dimensional inspection after each pass to dynamically correct process parameters.

　　Precision Post-processing and Inspection: After forming, remove impurities by ultrasonic cleaning, and perform low-temperature tempering if necessary to eliminate internal stress; use Coordinate Measuring Machine (CMM), laser diameter gauge, and surface roughness tester for 100% first article inspection + sampling inspection to ensure dimensions and surface quality meet requirements.

　　Manual intervention is avoided throughout the process, and human error is eliminated through automation and digital control, ensuring the consistency of parts in each batch.

　　Key Components

　　Ultra-Precision Molds: Punches and dies are made of cemented carbide (WC-Co) or polycrystalline diamond (PCD), finished by five-axis machining centers with dimensional accuracy of ±0.001mm and surface roughness of Ra≤0.01μm; the mold base is equipped with ball guide pillars and bushes, with coaxiality error ≤0.002mm to ensure no offset during stamping.

　　High-Precision Stamping Equipment: High-speed precision punch presses (tonnage 10-300 tons) equipped with servo drive systems and closed-loop control systems, with positioning accuracy of ±0.001mm and stepless adjustable stamping speed, adapting to different precision requirements.

　　Precise Positioning System: Combined with grating ruler positioning device, servo feeder, and pilot pin, realizing dual precise control of sheet feeding and mold alignment, with feeding error correction ≤0.002mm.

　　Closed-Loop Monitoring Components: Pressure sensors, displacement sensors, and online dimensional inspection probes, real-time feedback forming data, and link with the equipment control system to dynamically adjust process parameters.

　　Precision Inspection Equipment: Coordinate Measuring Machine (measurement accuracy ±0.0005mm), laser profilometer, and surface roughness tester for full-process quality verification.

　　Advantages vs Ordinary Stamping

　　High precision stamping has significant advantages in precision manufacturing scenarios: In terms of dimensional accuracy, the tolerance is controlled at ±0.001mm-±0.02mm, far exceeding the ±0.05mm-±0.2mm of ordinary stamping; in terms of surface quality, parts have a smooth surface without scratches or burrs (burr height ≤0.005mm) and do not require secondary grinding, while ordinary stamping parts often need subsequent precision machining; dimensional consistency is better, with inter-part deviation ≤0.01mm, meeting the assembly accuracy requirements of high-end equipment, while the deviation of ordinary stamping parts is mostly above 0.05mm; production efficiency is higher, high-speed precision punch presses combined with automated lines can achieve a production capacity of 300-800 pieces/minute, and no additional precision machining processes are required, which is more than 50% more efficient than the combined process of ordinary stamping + machining; material utilization is higher, precise mold design and nesting optimization reduce the scrap rate to ≤3%-8%, lower than the 10%-20% of ordinary stamping.

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