I. Challenges in the Valve Industry and Customer Pain Points
Keywords: automotive industry, automotive components, engine components
 

Introduction: China is a major producer and seller of automobiles, with passenger car output in 2024 nearing 30 million units, accounting for approximately 35% of global production.
Valves are critical components in the automotive and internal-combustion-engine industries. Since around 2015, China’s annual production of engine valves has consistently exceeded 200 million units. Driven by the rapid growth of China’s automotive industry, demand for valves—as core engine components—has continued to rise. However, the dual requirements of high precision (Ra 0.2–0.4 μm) and high efficiency in valve-stem machining pose significant challenges to conventional grinding processes.
 

Figure 1: Valve Stem

During its research, Jianchuan Shi found that the industry generally faces the following pain points:
1. The grinding wheel is prone to clogging, resulting in frequent dressing and a more than 30% reduction in production efficiency;
2. Emulsified coolant corrodes equipment and pollutes the environment, but switching to oil-based coolant results in uncontrolled surface quality;
3. Traditional metal dressers wear out quickly (requiring replacement every 500,000 parts), resulting in annual maintenance costs exceeding RMB 1 million.

II. In-Depth Technical Analysis and Solution Design for Arrow-Piercing-Through-Rock
In response to the challenge of deteriorating surface finish experienced by customers after switching from emulsifiable coolant to oil-based cutting fluid, the Jianchuanshi technical team has, through Three-Stage Problem-Solving Approach Achieving a breakthrough: Root Cause Analysis : Insufficient lubricity of the oil-based coolant accelerates wheel dulling, preventing the metal dresser from effectively removing the binder between CBN abrasive grains; Materials Innovation : Utilizing our independently developed CDD (Ceramic-Composite Dressing) technology, a gradient composite structure is achieved by integrating nanoscale ceramic phases (Al₂O₃ + TiC) with a metallic matrix, enabling controllable porosity (25–40%) and a hardness of HRC 65. Structural Optimization : A honeycomb-like porous structure is designed to triple coolant penetration efficiency and reduce machining force fluctuations to ±2 N.
Figure 2: Valve Structure Diagram

III. Quantitative Comparative Analysis of the Technical Advantages of the cDD Stone-Drilling Arrow Reconditioning Device

Figure 3: Arrow-Through-Stone CDD Trimmer

1. End-to-end services from Arrow to Stone empower customer value.
   Process Compatibility Verification : A test rig was set up at the customer’s site, and the dressing parameters were optimized using orthogonal experimental design (feed rate of 0.02 mm/rev and overlap ratio of 120%); Intelligent Monitoring System : Deploy IoT sensors to monitor parameters such as dressing force and temperature in real time, enabling early warning of wear conditions; Green Production Upgrade : Oil-based coolant consumption reduced by 40%, resulting in an annual reduction of RMB 800,000 in hazardous waste disposal costs.
    
2. V. Dual Breakthroughs in Economic Benefits and Social Value
3. Direct Benefits : Each production line saves RMB 570,000 annually in dresser procurement costs, and equipment utilization increases from 68% to 92%;
   Strategic Value : Assisting clients in passing IATF 16949 certification audits and successfully entering the high-end German automotive supply chain;
   Industry Benchmark : The case was selected for inclusion in the “China Automotive Manufacturing 2025 White Paper,” driving technological upgrades at more than 20 supporting enterprises in the industry.

Figure 4: CBN Grinding Wheel

VI. Evolutionary Roadmap for Arrow-Through-Rock Technology
As a national-level “Specialized, Refined, Distinctive, and Innovative” enterprise with 15 years of deep expertise in precision grinding, Jianchuanshi continuously iterates its CDD technology: in 2024, it launched an AI-powered self-learning dressing system, enabling dynamic optimization of grinding parameters. The upcoming CDD Pro will feature a diamond-coated tool, with a targeted service life exceeding 5 million parts. This technological upgrade underscores Jianchuanshi’s vision of “redefining the frontiers of manufacturing through materials science.” We are expanding CDD technology into high-end applications such as aerospace turbine blades and medical devices, steadfastly fulfilling our corporate mission to “make precision manufacturing simpler.” Looking ahead, Jianchuanshi looks forward to collaborating with a broad network of partners to explore the limitless possibilities of advanced manufacturing technologies.
(Note: The data presented in this document are based on actual measurements obtained using the Jianchuanshi CDD trimmer on the customer’s FA25 production line.)