darknovel Chapter 183 Quality Certification: Entry Barriers
Chapter 183 Quality Certification: Entry Barriers
In October 1985, Changcheng was already cool, but the precision machining workshop of Chenqing Precision Manufacturing Joint Venture was bustling with activity. Three modified precision grinding machines were running at a stable frequency, and the flying sparks drew fine arcs in the morning sunlight. The robotic arm precisely fed the finished bearings into the discharge port, and hundreds of brand-new bearings were neatly stacked on the quality inspection table next to the conveyor belt, their silvery metal surfaces gleaming with a uniform sheen.
Lin Chen, dressed in work clothes slightly stained with oil, held a freshly produced bearing in his hand, repeatedly measuring key dimensions with a dial indicator. A light blue system panel floated in his field of vision, updating data in real time: "Diameter error: 0.008mm; Roundness: 0.005mm; Surface roughness: Ra0.4μm," each indicator stable within the design range. He turned off the panel and looked up at the workshop entrance. Su Qing was accompanying three people wearing dark blue work clothes and badges reading "Red Star Home Appliance Factory Quality Inspection Department" on their chests as they entered. The middle-aged man at the head of the group had a serious expression and was carrying a heavy metal testing box.
"Director Lin, this is Director Li from the Quality Inspection Department of Hongxing Home Appliance Factory, who is in charge of the testing work during this trial period." Su Qing quickly stepped forward to introduce them. Today, she had specially changed into a neat white shirt with a navy blue silk scarf tied at the collar, and was holding a thick quality control manual in her hand. "These two are Engineer Wang and Technician Zhang from the Quality Inspection Department."
Director Li extended his hand, his palm calloused from years of handling testing tools, and shook hands with Lin Chen with a steady grip: "Director Lin, I've long admired your name. Before coming here, we already learned about your factory's technical upgrades, but Hongxing Home Appliances' 'Seagull' brand washing machines are a nationally renowned brand. Bearings are core transmission components; any quality issues could not only damage the product's reputation but also potentially lead to safety accidents. Therefore, our testing standards will only be stricter than national regulations, not lenient." He waved his hand, and Engineer Wang immediately opened the testing box, revealing neatly arranged precision instruments inside—a digital micrometer, a roundness tester, a surface roughness tester, and a slightly larger lifespan testing machine.
Lin Chen was prepared and gestured for Uncle Wang to bring over the sample boxes that had been prepared in advance: "Director Li, rest assured, Chenqing's products can withstand any test. This is the first batch of samples we produced according to your factory's drawings, a total of fifty sets, each with a complete production number and material testing record." He opened the sample box, and the bearings inside were arranged in numerical order. Next to each bearing was a small label indicating the production time, operator, and initial inspection data.
Director Li did not immediately examine the samples. Instead, he took out a neatly printed testing plan from his briefcase and placed it on the quality inspection table: "This trial period is three months. We have formulated ten testing standards, which will be implemented in three phases. The first phase is sampling testing, where we will randomly select 30 sets from your factory's daily production for dimensional accuracy, material composition, and surface quality testing. The second phase is environmental simulation testing, including high and low temperature impact and humidity aging tests. The third phase, which is also the most crucial, is the wear life test. We require the bearings to operate continuously at rated speed for 10 hours without failure, which is twice the industry average standard."
"10 hours?" Liu Guangtian had just delivered a batch of raw materials and couldn't help but stop when he heard this. "That's equivalent to running continuously for eleven years! Even the top-of-the-line imported bearings on the market might not be able to meet this standard, right?" His words drew the workers in the workshop to his side, their faces full of surprise—they knew that quality testing was required, but they didn't expect the standards to be so stringent.
Engineer Wang adjusted his glasses and explained calmly, "Seagull brand washing machines come with a lifetime warranty, so we must ensure the lifespan of our core components. Last year, a batch of bearings experienced premature wear, resulting in the return of thousands of washing machines and causing the factory a loss of over two million yuan. Therefore, lifespan is a crucial factor in this selection process." He pointed to the lifespan testing machine in the testing box, "This equipment can reduce the testing time to one-tenth of the actual lifespan by applying simulated loads. A lifespan of 10 hours requires continuous testing on our equipment for 1 hours, which is more than forty days."
The atmosphere in the workshop immediately became heavy. Uncle Wang held the testing plan, repeatedly looking at the technical parameters, his brows furrowing slightly: "We are confident in the dimensional accuracy and surface quality, but the uniformity of the material composition and wear resistance are indeed a challenge. Although we have improved the steel, it is still an integration based on domestic materials, and its stability under long-term high-load operation still needs to be verified."
Lin Chen appeared calm. He picked up a set of samples and handed it to Director Li: "Director Li, why don't we start with the first phase of sampling and testing? I believe the data will speak for itself." He gestured to Xiao Zhang from the quality inspection team to open the adjacent testing room. "Inside, we have set up a constant temperature and humidity environment according to your factory's requirements, and the testing equipment has also been calibrated by the Institute of Metrology to ensure the accuracy of the test data."
Director Li nodded and led the way into the testing room. The constant temperature of 25°C and humidity of 50% kept the testing instruments in optimal condition. Engineer Wang randomly selected five sets of bearings from the sample box and first used a digital micrometer to measure the key dimensions. When the measurement data for the first bearing appeared on the instrument screen, Engineer Wang's eyes lit up: "Outer diameter 42.002mm, inner diameter 20.001mm, tolerances controlled within 0.005mm, even higher than the 0.01mm precision required by the drawing." He measured the other four sets in succession, and all the dimensional data remained stable within a very small error range. Even Director Li, who had been looking serious, nodded slightly.
Next came the material composition testing. Engineer Wang used a spectrometer to test the bearing, and the elemental composition curves instantly appeared on the screen. When the content data for elements such as carbon, chromium, and manganese were displayed, he couldn't help but look up at Lin Chen: "Carbon content 0.98%, chromium content 1.52%, impurity content 0.03%. This composition ratio is very close to the standard of Swedish SS2343 bearing steel, but the cost is much lower. How did you manage to do that?"
"This is our independently developed alloy fusion technology." Lin Chen didn't explain much, but simply pointed to the data. "The key is the uniformity of composition. You can test several different parts." Engineer Wang followed his advice and took samples from the outer ring, inner ring, and rolling elements of the bearing. The test results showed that the composition deviation of each part did not exceed 0.02%, and the uniformity far exceeded the average level of domestic steel.
The first phase of testing lasted a full day. When the final surface roughness test was completed and all the data was compiled and handed to Director Li, he finally showed his first smile of the day: "Director Lin, the sampling test results are excellent. The pass rate of 98% out of 150 samples far exceeds our initial expectation of 60% for the new supplier. But this is just the beginning. The environmental simulation test and life test that follow will be the real test." He had 20 samples packed into a special sealed box. "We will take these samples back to the factory for life test, and we will also send a quality inspector to your factory to supervise the production quality throughout the three-month trial period."
After seeing off the testing team from Hongxing Home Appliances Factory, Lin Chen immediately convened an emergency meeting. In the conference room, key personnel from the technical, production, and quality control departments sat together, with testing data and production reports spread out on the table. Su Qing spoke first: "Director Li just told me privately that they were surprised by the sampling results and have already submitted our sample data to the purchasing department. However, we can't be careless during the three-month trial period, especially the lifespan test. If any problems arise, all our previous efforts will be wasted."
"What I'm worried about is the stability of mass production." Uncle Wang tapped the production report. "Today's samples were all carefully selected, but during mass production, the workers' skill level and batch differences in raw materials can affect the quality. I just checked today's production records, and three batches of bearings had a surface roughness slightly higher than the average. Although it's still within the acceptable range, long-term operation may affect its lifespan."
Lin Chen opened the system and retrieved the real-time monitoring data for mass production. The system, through sensors installed in the workshop, tracks the processing parameters and raw material composition of each grinding machine in real time, creating a clear quality fluctuation curve. "You see," he explained, pointing to the peak in the curve, "the fluctuations in these three batches all occur before and after shift changes. This is due to errors in the operators adjusting equipment parameters during shift changes. And here, the manganese content of the raw material fluctuates slightly. Although our fusion technology can compensate for some of this, it still affects the final wear resistance."
Liu Guangtian immediately stood up: "Tomorrow I will adjust the shift change process, requiring technical personnel to be present to supervise parameter adjustments during shift changes. We will also add a pre-shift trial run to ensure equipment stability. Regarding raw materials, I will communicate with the suppliers and require them to provide material testing reports for each batch; any substandard materials will not be accepted."
"That's not enough." Lin Chen shook his head. "We need to establish a full-process quality traceability system. Starting today, every batch of raw materials will be numbered, the processing parameters of every piece of equipment will be recorded in real time, and every bearing will be marked with a production number, so that if a problem occurs, it can be accurately traced back to the specific batch of raw materials, equipment, and operator." He looked at Xiao Zhang in the quality inspection department, "I will use the system to optimize the quality inspection process and develop a rapid testing method to increase the efficiency from 10 sets per hour to 30 sets, achieving full inspection coverage."
In the following days, Chenqing Factory entered a state of full-scale quality inspection. Lin Chen, along with the technical department, spent three days developing a "three-step rapid inspection method": the first step was to use an optical screening machine to quickly check dimensional accuracy; the second step was to use an eddy current flaw detector to check internal defects; and the third step was to use a portable roughness tester to sample and check surface quality. This method tripled the inspection efficiency, achieving full inspection of all products. Liu Guangtian implemented a strict shift change system. During shift changes, not only were technical personnel supervising, but the last 10 products of the previous shift were also compared with the first 10 products of the next shift to ensure that the parameters were adjusted correctly.
Old Chen, the quality inspector dispatched by Hongxing Home Appliances Factory, spent every day in the workshop, randomly inspecting products with testing instruments. At first, he was somewhat picky, raising various questions at the daily morning meeting, ranging from tiny scratches on the bearing surface to minor fluctuations in processing parameters. However, with the establishment of the full-process traceability system, he raised fewer and fewer questions, and instead began to praise Chenqing Factory's quality control in his inspection reports as "stricter than many large state-owned factories."
Two weeks later, Old Chen suddenly approached Lin Chen, placing a test report on the table with a grave expression: "Director Lin, this batch of bearings, numbered 108, showed a slight increase in clearance during the simulated high-temperature test. Although it is still within the acceptable range, long-term operation may affect its lifespan." He pointed to the data in the report, "Our factory's laboratory has conducted three repeated tests, and the results are consistent."
Lin Chen immediately convened his technical team to analyze the cause. Through the traceability system, they quickly identified batch 108 as using raw material numbered A23, a new batch from the supplier. He used the system to conduct in-depth analysis of this batch of raw materials and found that while the sulfur content was within the national standard range, it was 0.005% higher than previous batches. This minute difference caused the gap changes at high temperatures. "Sulfur reduces the high-temperature stability of steel. Although the content is low, it will be exposed during 10 hours of long-term high-temperature operation," Lin Chen explained.
"What should we do with this batch of products? We've already produced two thousand sets. If we scrap them, the loss will be too great." Su Qing looked at the production report, her face full of worry—the cost of two thousand sets of bearings was nearly 30,000 yuan, which was no small amount for Chenqing Factory, which had just recovered. Old Chen also looked troubled. According to regulations, products with potential risks must be scrapped, but he also knew what this meant for Chenqing Factory.
Without hesitation, Lin Chen said, "Scrap everything and start production again." He picked up the phone and called the supplier directly. "The sulfur content of batch A23 steel exceeds the standard, which does not meet our procurement criteria. I demand a full return and compensation for our production losses. In addition, starting today, all raw materials must be accompanied by third-party testing reports; otherwise, we will no longer cooperate."
After hanging up the phone, he looked at everyone and said, "Quality is the lifeline of a company, especially for us as a new supplier. Once we lose Hongxing Home Appliances' trust due to quality issues, there will be no chance of recovery. Although scrapping the products will result in losses, it can prevent even greater risks later on and make our quality system more complete." He turned to Old Chen and said, "Master Chen, we will destroy all of these products. We invite you to supervise the entire destruction process. At the same time, we will reproduce a batch of qualified products within three days to replace them."
Looking at Lin Chen's determined eyes, Old Chen suddenly stood up and gave him a thumbs up: "Director Lin, just based on your attitude, I believe Chen Qing will definitely pass the probation period. To be honest, many manufacturers would choose to cover up this kind of potential risk, but you took the initiative to scrap it. This sense of responsibility is truly rare." He offered, "I will record the entire destruction process and report it to the factory. At the same time, I will also suggest to Director Li that the probation period assessment be ended early."
On the day the products were destroyed, Lao Chen recorded the entire process, watching as two thousand sets of bearings were sent into the furnace for remelting. In his report to Hongxing Home Appliance Factory, he wrote: "Chenqing Factory has a complete quality control system and a strong sense of responsibility. Its product quality is stable and reliable. I suggest signing a formal supply contract immediately." Meanwhile, in the laboratory of Hongxing Home Appliance Factory, the first batch of 20 samples had been running continuously for 6000 hours, and all performance indicators remained stable, far exceeding those of the other three suppliers tested at the same time.
On the last day of the probationary period, Director Li personally brought the purchase contract to Chenqing Factory. When he entered the workshop, he saw a well-organized production scene: workers operated the equipment according to standard procedures, quality inspectors constantly moved around the production line, and every bearing underwent strict testing before entering the finished product warehouse. On the quality control board on the wall, the pass rate had been consistently above 99.5% for a month, far exceeding the 95% required by the contract.
"Director Lin, we don't need to wait three months anymore." Director Li placed a thick contract in front of Lin Chen. "The data from the lab and Lao Chen's report both prove that Chenqing's products fully meet our requirements, and even exceed our expectations. This is the annual supply contract, with an initial order of 500,000 sets. Subsequent orders will be adjusted according to our production plan, and the unit price will be executed according to our previous agreement." He picked up a pen. "As long as you sign, Chenqing will be the core bearing supplier for 'Seagull' brand washing machines."
Lin Chen took the pen, but didn't immediately put it down. Instead, he looked at Su Qing and all the employees present. Su Qing's eyes sparkled with excitement as she nodded to him; Uncle Wang and Liu Guangtian clenched their fists tightly, their faces full of anticipation; the workers in the workshop also gathered around, their eyes brimming with pride. Lin Chen took a deep breath and signed his name on the contract, his gesture firm and resolute.
"That's great!" Liu Guangtian was the first to cheer, and thunderous applause and cheers erupted in the workshop. The workers hugged each other, some even shedding tears of excitement—they knew that this contract not only meant the stable development of the factory, but also that they, ordinary people from state-owned factories, rural areas, and scrap yards, had won the recognition of a nationally renowned manufacturer with their own hands and skills.
Director Li, moved by the scene before him, smiled and said to Lin Chen, "Factory Director Lin, I've seen many suppliers sign contracts, but I've never seen such a cohesive team. I believe choosing Chenqing was the best decision we ever made." He took out a technical drawing from his briefcase. "This is the bearing drawing for our new washing machine next year. It has higher precision requirements and a lifespan of 12 hours. We hope Chenqing can develop it ahead of schedule and become the exclusive supplier."
Lin Chen took the blueprints. The technical parameters on them were a level higher than those of existing products, but he did not hesitate at all and immediately agreed: "Director Li, rest assured, we will definitely produce samples within three months. Chen Qing will not only be a qualified supplier, but also a partner who can grow together with Hongxing Home Appliances."
That evening, Chenqing Factory held a grand celebratory banquet. The canteen was brightly decorated, and the tables were laden with chicken, duck, fish, meat, and fine wine. Workers took turns toasting Lin Chen, Su Qing, and Uncle Wang. Liu Guangtian, raising his glass, declared loudly, "I, Liu Guangtian, used to just coast along in a state-owned factory. It was Factory Director Lin who led us out to start our own business, teaching us the skills. Now we can supply nationally renowned brands. My life has been worthwhile! I toast Factory Director Lin!"
Lin Chen accepted the glass, stood up, and looked at his comrades-in-arms: "This glass isn't for me, it's for all of us. It's everyone's concerted efforts and our commitment to quality that have brought us to where we are today. But this is just the beginning. Our goal is to make the best precision bearings in the country and make 'Chenqing Precision' a world-renowned brand!"
The banquet reached its climax, with cheers and clinking glasses echoing through the night sky of Zhangcheng. Lin Chen and Su Qing stood side by side at the entrance of the cafeteria, watching the lively scene inside. Moonlight bathed them, casting a soft glow on them. "Next, we need to expand production, introduce more advanced equipment, and establish our own research and development center," Lin Chen said softly.
Su Qing nodded, her eyes shining with determination: "I've already made financial plans. Once we receive the first payment, we can start the expansion plan. I believe that with our joint efforts, Chenqing's future will be even brighter."
In the distant workshop, the hum of the precision grinding machines has ceased, but the bearings that have just rolled off the production line lie quietly in the finished product warehouse, awaiting delivery to washing machine production lines across the country. They embody the dreams and perseverance of Chenqing's employees and mark Chenqing Precision Manufacturing's official entry into the core field of precision manufacturing in China.