Most popular face-to-face strengthening, correct s

2022-09-23
  • Detail

Face up to strengthening, strengthen correctly

there is a classic saying in Villette (Group) and it is widely spread, that is, "cleaning is art, strengthening is science." With the improvement of manufacturing industry, people have gradually had a correct understanding of reinforcement

cleaning up and strengthening

the term "strengthening" is no longer strange, but some people who are new to the field have unclear or vague understanding of its concept. Some people believe that cleaning up is strengthening, and cleaning up can strengthen. This misunderstanding may be caused by the following factors: lack of educational resources and materials on strengthening the correct process; Lack of appropriate strengthening equipment for capital investment; There are cleaning equipment and only the habit of cleaning; Some cleaning equipment manufacturers mislead customers because they are unable to design enhanced equipment

although there are many ways to evaluate the cleaning quality according to the material, hardness range and size of metal materials, the most common is to rely on visual inspection to measure the cleaning results. The assessment of cleanliness varies from person to person. At present, there are also some unified visual proofreading samples and standards in the world, especially for plates, steel pipes and steel components. Some benchmark photos of surface corrosion and cleaning standards are provided for comparison to confirm whether the cleaning requirements are met. If there is a requirement for surface roughness, a special roughness measuring instrument can also be used. Even so, the cleaning process still mainly depends on human visual inspection, and the degree of quantification is low; Strengthening requires high controllability, high repetition and data, so that it is more evidence-based and clearly defined

the importance and advantages of strengthening process have been familiar and recognized by everyone. Whether for leaf springs, round springs and transmission components in the automotive industry, considering the factors such as simple peripheral circuit, good reliability, low power requirements and economy, the cleaning process of landing gear or engine parts in the aviation field cannot be equal to or replace the strengthening process. Use hardening to achieve specific Almen intensity, saturation, and coverage of 100% or higher. This strengthening strength is the compressive stress value desired by the part design engineer. In addition, some key parameters, including the size of shot media such as steel shot, wire cutting shot and glass shot, are also specified by the part design engineer

advanced strengthening equipment

the initial strengthening is to use the compressed air nozzle to spray the steel shot to the parts that need strengthening. In order to meet the expanding demand of customers' production requirements, Villette (Group) has also developed and designed equipment for shot blasting strengthening with centrifugal force. When the parts have specific target areas/parts that need strengthening, or when the designed shot material is ceramic beads and glass beads, shot peening with compressed air is an ideal choice. At the same time, the nozzle manipulator can realize enhanced high automation

if there are production time constraints, or in the high-capacity, batch manufacturing environment, such as the automobile parts manufacturing industry is used to strengthen leaf springs or round springs, centrifugal shot blasting is ideal. According to the application needs, the strength value on the 'a' type test piece can be in the range of 0.010 ~ 0.015in (1in=25.4mm), and the coverage rate is required to be 100 ~ 200%. The most critical evaluation index of strengthening equipment is the repeatability of production and the constancy of strengthening results. The process parameters that affect the strengthening results include: spray anchor cable lock Φ 44mm nozzle size/polishing head size, polishing head power (such as shot blasting), injection/blasting speed, nozzle/polishing head angle, polishing head position, directional sleeve movement and nozzle travel

the position of the polishing head is very important to ensure that the surface of the spring can obtain the required enhanced coverage. The determination of the position of the polishing head is a scientific and rigorous design process, which is achieved through many tests on multiple parts samples, and the study of the best factors such as the ejection angle, speed and shot flow at this position, through tests, research, adjustment and retesting

high quality strengthening equipment usually uses a touch-screen friendly user interface, supplemented by PLC (more sophisticated equipment uses C to inspect the deformation process and damage situation of materials through tightening experiments, NC) to realize machine program control. In addition, the high-end enhanced equipment of Villette (Group) also has the function of closed-circuit reporting, real-time monitoring of equipment operation, various performance parameters, error reminders, automatic shutdown of equipment, automatic fault finding and troubleshooting, etc. Only such strengthening equipment can ensure the high repeatability of production and the constant consistency of strengthening results

like cleaning equipment, strengthening equipment needs routine and regular maintenance. The factors that determine whether the equipment has high reliability, less downtime and low maintenance demand include: the use of materials with high wear resistance; Direct motor drive replaces belt pulley drive; Easy and simple installation/disassembly; The position of the nozzle/polishing head in the shot blasting/blasting room is reasonable to reduce the unnecessary hammering of the shot flow on the wall of the shot blasting room; Use advanced control system to help find and eliminate problems as soon as possible

strengthening is attracting attention

in recent years, the understanding of strengthening has gradually shifted in the right direction in industrialized countries, such as India and China. Many world-renowned industrial giants have set up manufacturing plants in these countries and brought them here with the best technology and process that have been proved in their home countries. Reinforcement, as one of the key processes, has also been rigorously and scientifically applied and approved. Whether it is a wholly-owned company or a joint venture, these top industrial enterprises, in order to standardize and strengthen the process, clearly define the process requirements and set standards as the "Bible", and require their subsidiaries or third-party manufacturers to strictly comply with them, so as to ensure that the products produced in these countries maintain the same quality as the factories in their home countries. In addition, if developing countries want to export parts and components products to mature markets in Europe and the United States, their production processes must include the process of "correct strengthening", and must strictly comply with and comply with the strengthened specifications. (end)

Copyright © 2011 JIN SHI