Why China's cable product quality qualification rate is low year-round

The sampling test results of CCC certified products from 2004 to 2007 show that the pass rate of sampling inspection of wire and cable products is always between 80% and 90%; and in the more stringent China Southern Power Grid company, the cross-linked power cable for the application of the short-listed supplier is applied. In the sampling test, the qualified rate for 2004-2007 for 4 consecutive years was only between 60% and 80%. In the unqualified project, the structural size problem occupies a major part. It also includes the signs and the color of the insulated wire core, electrical performance, insulation and mechanical properties of the jacket.

Wu Changshun reluctantly said: "Actually, the items tested are basic indicators of wire and cable products and are easy to control, but after years of industry rectification did not improve. According to Wu Changshun, an industrial and commercial bureau had 60 samples of 36 companies. A random sampling test was conducted on the market. As a result, 24 companies were unqualified, the enterprise's pass rate was only 33.3%, and 50 samples failed. The product pass rate was only 16.7%.

Wu Changshun is concerned about the quality of products that have remained at low levels: “In recent years, the domestic cable industry has produced hundreds of billions of yuan of wire and cable products each year. These products are widely used in all walks of life, major projects, and national key projects in the national economy. Wire and cable products will have a major impact on the normal operation of the national economy, the implementation of major projects, and the safety and stability of the society for quite a long period of time. The large area of ​​the industry and the drastic decline in product quality cannot but make us worry."

Currently, unqualified products circulated in the market account for a large proportion of problems such as cutting corners of conductors, using inferior insulation and sheathing materials, rubber wire insulation and sheathing materials containing significantly lower amounts of rubber.

"The problem of product quality is not that production companies cannot produce qualified products. Instead, the overcapacity in the entire industry leads to chaos and vicious competition. Disorder and vicious competition forces companies to cut corners and adopt cheap and unqualified materials to reduce costs. Pressure, to maintain profit space." Wu Changshun spoke of an important reason why product quality can not be improved. For example, during the inspection process, China Southern Power Grid discovered that many companies’ products were unqualified due to the use of inferior raw materials, regardless of their production capacity and technological level. The quality of raw materials is a prerequisite for the production of qualified wire and cable, bringing a series of product quality problems. If the company can establish inspection procedures for raw materials that meet its own characteristics and strengthen its inspection capabilities, the quality level of products will be greatly improved.

It can be seen that the fundamental factor of low product quality is "man-made disaster", that is, low-cost distortion of quality consciousness. Therefore, corporate management must eliminate many irrational factors in the industry, consciously correct the direction, improve legal awareness, and establish a correct sense of business ethics and social responsibility.

The timely shift of the management thinking, whether it can fundamentally change the extensive quality control methods in production, also depends on the specific implementation process. Therefore, companies should provide long-term skills training and quality awareness training for first-line technical personnel in R&D, production, and testing.

However, currently in the entire industry, with the expansion of production capacity, the development of technical personnel lags behind, resulting in rapid increase in per capita output value in a short period of time, increasing the hidden dangers of product quality in production. At the same time, the shortage of talent has also accelerated the flow of talent. However, due to the differences in the system, scale, and level of the enterprises, the frequent movement of personnel has caused the operation of their posts to be constantly in a running state, which is not conducive to sustained and stable production. Therefore, companies should cultivate a localized and stable technical talent team.

If the weak sense of quality is only a kind of subordination of the bottom line of the enterprise's moral decline under market pressure, then the backward production process and low degree of automation of wire and cable enterprises in China will become a serious flaw in improving product quality. The cable production process is long and everything is determined in a dynamic manner. Process quality control is particularly important. It is difficult to accomplish with only the quality and experience of technicians. It requires the use of advanced digital equipment.

First of all, there must be a metrological verification of the wire and cable special testing equipment. Testing equipment is a benchmark for measuring product quality. If there is an error in itself, it will lead to the waste of subsequent production processes and eventually produce unqualified products. Wu Changshun said: "Many companies purchase metering equipment, not for the verification of inspection and maintenance equipment, but as a tool to cope with inspection agencies. It seems that omitting a process, reducing production costs, in fact, it is a serious waste of sample, manpower and Material and testing are inconclusive.” Secondly, effective monitoring equipment, such as diameter measuring instruments and thickness on-line testers, should be equipped to implement the parameters specified in the process document to ensure that the document requirements are in line with the actual material. In order to ensure the accuracy of detection and monitoring data, it is strongly advocated in the industry to adopt detection equipment and production equipment with automatic data collection by computers, so as to improve the accuracy of measurement data and the traceability of measurement data.

In addition, during the analysis of many quality accidents, it was found that improper engineering design or improper use of the user is also one of the important causes of shortened service life of wire and cable products, early breakdown short circuit, and deformation and melting. Wu Changshun said, "For factors outside of production, companies should not let it go, but should rely on their own technology and experience to guide engineering design units and customers to provide rational selection and design requirements." Cable industry users also have to Encourage manufacturers to produce according to standards, put quality and brand first, face up to the objective cost of production of the company’s products and the profits it deserves, and face the adverse consequences of winning the bid at the lowest price.