Plate rolling is a process of continuous three-point bending of sheet metal using a plate rolling machine. The equipment puts the sheet material between the upper and lower work rolls when rolling. The upper roller is raised and lowered vertically, and the two lower rollers rotate and move horizontally relative to the axis of the upper roller. When the upper roll descends, the plate is plastically deformed and bent between the upper and lower work rolls. The continuous rotation of the bottom roller drives the steel plate to advance and retreat through the friction between the plate and the roller to complete the coiling. Rolling Machine,Three-Roller Bending Machine,Four-Roller Bending Machine,Roll Forming Machine Rugao Yaou Import & Export Trade Co., Ltd , https://www.ntyaoumachinery.com
1. Pre-bending. When the plate is rolled, there is a length at both ends of the plate that does not bend because it does not touch the upper roller. It is called the remaining straight edge. In the process, the minimum force arm at which the plate starts to bend is called the theoretical remaining straight edge. The bending form (symmetrical bending, asymmetrical bending) is related.
2. Centering. The purpose of centering is to make the generatrix of the workpiece parallel to the roller axis to prevent skew.
3. Roll round. Rolling is the main process of product forming, which is divided into two types: one-time feed and multiple feeds. Multiple feeds are commonly used for rolling thick plates. The number of feeds depends on the technological constraints (such as the maximum allowable deformation during cold rolling) and equipment constraints (such as non-slip conditions and power conditions). When the rebound of the cold coil is significant, a certain amount of overcoiling must be added.
4. Straightening round. The purpose of rounding is to make the curvature of the entire circle as uniform as possible to ensure product quality. The general rounding process is divided into three steps:
(1) Load: According to experience or calculation, adjust the work roll to the position of the required maximum correction curvature.
(2) Rounding: Roll the roller 1 to 2 turns under the corrected curvature to make the entire curling rate uniform.
(3) Unloading: gradually unload the load, so that the workpiece is rolled several times under the gradually reduced correction load.
"Fake foreign brand" quickly "heats up" in the cold mahogany furniture market
Mahogany furniture is sought after by mahogany furniture. Since July this year, the "Da Vinci Incident" has been the focus of the world. For a time, the “purity and purity†of high-end foreign brand furniture attracted speculation. At the same time, the mahogany furniture market has been hot in the near future, and some mahogany furniture stores in Shenzhen have even seen the phenomenon of sweeping goods to buy mahogany furniture. The follow-up reaction to the "Da Vinci Incident" seems to indicate that the values ​​in the high-end furniture consumption sector are quietly undergoing fission. "Fake foreign brands" are well-received to reflect the concept of irrational consumption. As a production factory in the world, China has many world-class brands that are produced in China, which means that China has the ability to produce equivalents with world-renowned brands. In the market, it is an indisputable fact that the price of domestic famous brands is much lower than that of foreign brands of the same quality or even fake foreign brands. Why is the “fake foreign brand†favored? According to Deng Xuesong, deputy secretary-general of the Traditional Furniture Committee of the China Furniture Association, although China has undertaken the ability to process and produce internationally renowned brands, the relevant departments still have omissions in the establishment of quality management systems and actual supervision and implementation, and the quality of domestic products has emerged. It is always slightly inferior to the export product. At the same time, counterfeit and shoddy domestic products are rampant in the world, which also directly affects consumers' confidence in domestic products. In addition, the Da Vinci marketing phenomenon also shows the fact that there are irrational consumption psychology and foreign beauty in the high-end consumer field. After the “Da Vinci Incidentâ€, the mahogany furniture market quickly heated up. Since the “Da Vinci Incidentâ€, the popularity of the domestic mahogany furniture market has increased sharply. Shenzhen Mingzhu Yicheng and Art Exhibition Center two large mahogany furniture exhibition venues, the recent statistics of the store turnover has increased significantly, and even the customer spent tens of millions to go to the store to sweep the purchase of huanghuali furniture. The traditional furniture leading brand Wu Shi Xinglong Shenzhen branch manager Li introduced that the number of customers coming to order recently has exceeded their current production capacity. In order to ensure the quality of production, the notice of suspending the order has been posted in the store. According to Zhang Wenhai, the general manager of Hong Kong American Union Redwoods, they have a number of customers in various districts in Shenzhen. The number of customers who have consulted the price and have the intention to sell has increased significantly. Especially the hall series mahogany sofas are widely favored. Nearly half said that the "Da Vinci Incident" made them more cautious when purchasing high-end modern imported brand furniture. Zheng Xiyang, general manager of Shenzhen Grand View Garden, said that according to the experience of previous years, these months should be the off-season of furniture sales. Because the weather is hot, customers do not go out, so there is not too much inventory in each furniture store. However, the actual situation in the recent period has far exceeded expectations. The customers who came to see the goods and consulted were in a constant stream. At present, the model furniture of their store is basically reserved, and other customized furniture needs to be delivered until the end of the year. Afterwards, the reporter interviewed Yang Bo, chairman of Beijing Yuan Henry Furniture. According to the introduction, the consumer demand in Beijing's mahogany furniture market is also very strong recently. Their performance in multiple store sales in China has increased significantly compared with previous years. The mahogany furniture industry has developed steadily in recent years. From the perspective of the prices of several precious raw materials, the most basic ones have increased by more than 20% in recent years. The appreciation of mahogany furniture and the advantages of inheriting future generations are increasingly recognized by consumers. fact. Under the expectation of relative depreciation of the currency and inflation, this advantage will also be recognized and sought after. Then, whether the recent popularity of the mahogany furniture market has been spurred by the “Da Vinci Incidentâ€, will some consumers shift their consumer demand from modern furniture to mahogany furniture? Deng Xuesong told reporters that the "Da Vinci Incident" will prompt consumers to be more calm in the face of modern high-end furniture, to judge whether the price and value are equal, and the cultural connotation and actual style of the brand itself. In fact, modern style furniture and traditional style mahogany furniture correspond to different consumer needs. Modern style furniture tends to be economical and practical, and it is very practical and functional in line with the needs of modern life, so it has a wide market. However, positioning in the field of high-end consumer goods, the value of appreciation of furniture and the preservation and value-added performance and inheritance should undoubtedly be concerned, but in this respect it is certainly not able to compete with traditional mahogany furniture. The high price and high value status of traditional Chinese furniture is not the result of self-hype in the domestic industry. It is precisely the large-scale art institutions and museums in the West that have acquired large-scale art collections in China and used them as top-level art collections. The prosperity and development of the traditional furniture industry, so the actual value of traditional Chinese furniture is widely recognized around the world. Therefore, the recent boom in the mahogany furniture market can be seen as a result of the selection of prices and value by some high-end consumers. Experts are optimistic about the mahogany furniture market. The mahogany furniture has continued to heat up in recent years. The traditional furniture such as huanghuali and rosewood are expensive. Even the Laos red rosewood, which used to win the price, has risen nearly 150 in just two years. %, so why is mahogany furniture so hot? Is there a foam component in expensive mahogany furniture? In this regard, Mr. Wu Bingliang, the vice chairman of the China Furniture Association, said that the high price of mahogany furniture is caused by two major factors. The first is that the resources are scarce and the materials are expensive, which raises the threshold of furniture prices, such as Hainan huanghuali wood. The price per kilogram is as high as several thousand yuan. In addition, mahogany furniture can not be fully mechanized and automated production, many processes rely on manual completion, and the labor costs of mahogany furniture industry far exceeds other industries. In mahogany furniture enterprises, woodworking with monthly salary of over 10,000 is not uncommon, and experienced foreman It is not surprising that workers with good technical skills earn hundreds of thousands of dollars a year. Therefore, the production cost of mahogany furniture is high. When talking about why mahogany furniture is so hot, Wu Bingliang said that in recent years, with the continuous development of the domestic economy, the national self-confidence has been gradually restored and strengthened, and people’s recognition of traditional culture has also deepened, while mahogany furniture Its unique green environmental protection, scarce resources, artistic appreciation and practicality, value preservation and value-added stability have won the favor of high-end consumers. With the increasing living standards of people, the demand for traditional mahogany furniture will continue to increase. The year-by-year expansion of consumer groups and the regional market have also extended from the early developed cities of Beijing, Shanghai, Guangzhou and Shenzhen to second- and third-tier cities. The contradiction between the increasing demand and the declining natural precious wood resources year by year is difficult to solve in the short term. Therefore, the price of mahogany furniture is increasing year by year. For example, the Vietnamese huanghuali wood in previous years has basically every store, but now it is hard to see on the market, the import of materials is completely exhausted, and the existing timber stock of red rosewood can maintain the domestic for many years. The market demand, so the price has increased significantly. According to the current economic development momentum, the prosperity of the mahogany furniture market will continue.