Zhengna Technology controls quality from raw material inspection to first-article approval, in-process monitoring, surface treatment review, final inspection, packaging, and shipment. Our quality system supports custom stamping parts, CNC machining parts, sheet metal parts, springs, injection molded parts, molds, fasteners, and assembled OEM components. For made-to-drawing projects, our team reviews critical dimensions, material requirements, tolerance risks, surface finish, plating thickness, hardness, burr control, appearance, fit, and packaging protection before batch delivery.
Zhengna Technology uses more than 40 inspection and testing devices for dimensional measurement, material verification, coating thickness, hardness, surface quality, spring performance, and final product inspection.
Examples of products supported by Zhengna Technology quality control include automotive sheet metal parts, armrest hinges, custom springs, slide rails, CNC machined parts, stamped brackets, injection molded components, and assembled OEM hardware.stamping parts, sheet metal parts, injection molded parts, molds, machined parts, springs, functional and structural parts, etc.
Full-link mould development capability
Complete the whole process of design/CAE simulation/manufacturing independently
Annual output of 400+ sets of precision stamping moulds (0 outsourcing dependency)
Millions of Intelligent Manufacturing Scale
Hinge annual production capacity of 1,000,000+ sets, the whole process of self-control cost reduction 15%~ 20% compared with the industry)
Scale flexible production line to support rapid delivery + customized response (cost and agility double advantages)
Specialised research system for interior springs
With 30 years of experience in interior spring production, we combine simulation software and real-life environment simulation to focus on solving common problems such as abnormal noises, unstable force values, and substandard service life encountered in daily use.
Vertical technology patent matrix
. build heavy / silent / high life type three major slide rail patent cluster
. Heavy duty slide: through the high peel strength structural design (such as bidirectional occlusion depth differentiation), to enhance the ability to resist collision deformation, peel strength ≥ 15kN (industry average of 8 ~ 10kN)
. Silent slide: the use of curved surfaces + multi-hole buffer and ball damping synergistic, collision rattle reduction of 40dB + (measured values) )
. High-life type slide: optimise the smoothness of the arc of the ball slide groove and the layout of the isolation tube, the cycle life 2 200,000 times (2 times more than the national standard)
No. 575, East Xingfu Road, Hongqiao Town, Yueqing City, Wenzhou City, Zhejiang Province, China
EN
Projector / Optical Measuring Projector
2D Optical Measuring Machine
Rockwell Hardness Tester
Spring Life Tester
X-Ray Fluorescence Spectrometer
Coordinate Measuring Machine (CMM)