Service HotlineGuangdong Yueluo Hardware Industry Co., Ltd. discloses a through-hole mounting nut, which includes a hexagonal portion and a cylindrical portion, a threaded hole is arranged between the hexagonal portion and the cylindrical portion, and the cylindrical portion is provided with a threaded hole. Two grooves, each of the two sides of the groove has a convex side, and the upper surface of the side is provided with a convex point; the advantage is that the two sides are squeezed by the bolt, Or after the hammer is struck, it will bend to both sides, and it can be fastened to both sides of the screw hole of the sheet metal without welding.
When processing some disc parts, the mandrel is often used for positioning, and the nut is pressed on it. However, the ordinary nut cannot meet the requirements due to its small end face and poor flatness. The user needs to make the nut, and the cost is high due to single-piece production.
The flat key transmits torque on the side, has good neutrality, is easy to assemble and disassemble, and cannot realize the axial fixation of the parts on the shaft. Ordinary flat key: Type A, Type B, Type C, Type A is used for shaft grooves machined by end mills. The key is well fixed axially in the groove, but the stress concentration caused by the groove on the shaft is large; Type B is used for disc milling cutters. The machined shaft groove, the stress concentration of the shaft is small; the C type is used for the shaft end; it is suitable for high-speed, high-precision or occasions under variable load and impact, such as fixing gears, sprockets and other rotating parts on the shaft. Guided flat key: The key is fixed on the shaft with a screw, the key and the hub groove are in dynamic fit, and the parts on the shaft can move axially. For the convenience of starting the key, there is a key-starting screw hole. Use the occasions where the axial movement of the parts on the shaft is not large, such as the slip gear in the gearbox. Feather key: The key is fixed on the axle, and the parts on the shaft can move axially with the key; it is used in the occasions where the axial movement of the parts on the shaft is large;
The cylindrical pin magnetic positioning automatic press-in mechanism includes a base, a guide block is arranged on the base, one end of the guide block is provided with a guide vertical plate, and a push-up column is arranged under the end, and the push-up column is connected with a driving mechanism to drive The mechanism is arranged inside the guide vertical plate; one side of the guide block is provided with a push plate, the end of the push plate is provided with a semicircular groove, the push plate is connected to the driving mechanism, and the driving mechanism is arranged on the base The other side of the guide block is provided with a workbench located on the base, an error-proof positioning mechanism is arranged above the workbench, a press-in mechanism is arranged above the error-proof positioning mechanism, and one side of the error-proof positioning mechanism is provided. There is an error-proof detection mechanism; the press-in mechanism includes a punch, a punch block and an upper template arranged in sequence from bottom to top, and the upper template is driven and connected with five driving mechanisms; the error-proof detection mechanism includes a fixed angle plate, a fixed angle The plate is arranged on the worktable, and the fixed angle plate is provided with a four-drive mechanism, and the four-drive mechanism is connected to the detection head.
China is the world's largest producer of carbon steel fasteners such as screws, nuts and bolts, and the EU is a major market for these products. In January 2009, the EU decided to impose anti-dumping duties of 26.5% to 85% on Chinese carbon steel fastener products. On July 31 of the same year, China resorted to the relevant EU legislation and anti-dumping measures to the WTO dispute settlement mechanism. The case became China's first lawsuit against the EU at the WTO. On July 15, 2011, the WTO Appellate Body issued a report and finally ruled that China won the case in the trade dispute with the European Union on fasteners. The head of the Department of Treaty and Law of the Ministry of Commerce of China welcomed the ruling on the 16th, and said that China's victory in the case is of great significance, which will help improve the competitive environment for Chinese companies in the international market including the European Union, and will also strengthen the WTO members' interest in the case. Confidence in WTO rules and the multilateral trading system. This is not only a victory for China's industry, but also a victory for WTO rules, the official said. The WTO Appellate Body found in its ruling report issued on the 15th that Article 9(5) of the EU's Basic Anti-dumping Regulations on individual tax rates violated WTO rules; at the same time, the Appellate Body overturned some of the panel's rulings and supported China's position , ruled that the EU's anti-dumping measures against Chinese screws, nuts, bolts and other carbon steel fasteners also violated WTO rules in terms of domestic industry identification, normal value and fair comparison of export prices. The head of the Treaty and Law Department of the Ministry of Commerce of China said that the EU is one of the WTO members that has initiated the most anti-dumping investigations against Chinese products in the world. unfair treatment. He said that China hopes that the EU will cancel the legislation and discriminatory anti-dumping measures that are inconsistent with WTO rules as soon as possible, treat Chinese export enterprises fairly, and effectively safeguard free trade and fair competition.
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