CNC lathes do not meet the standard
According to the "Product Quality Law of the People's Republic of China" and the "Administrative Measures for State Supervision and Inspection of Product Quality", the General Administration of Quality Supervision, Inspection and Quarantine organized the third batch of national supervision and spot checks on product quality in 2010, and announced the national supervision and spot check on the quality of CNC lathe products. result. This time, a total of 21 CNC lathe products produced by 21 enterprises in Liaoning, Heilongjiang, Shanghai, Jiangsu, Zhejiang, Shandong and other six provinces and municipalities were sampled. According to the National Machine Tool Quality Supervision and Inspection Center, there are 2 kinds of products (CK6136 CNC lathe of Yancheng Nanhua Machine Tool Co., Ltd. and CK6130 CNC lathe of Yuhuan Huanyu Machine Tool Manufacturing Co., Ltd.) do not meet the requirements of relevant standards. The unqualified project involves protection coupling circuit. , electric shock protection, accuracy.
The pass rate of Guangdong forging machinery products was 84.0%.
In the inspection, a total of 152 batches of forging machinery products were produced by 147 companies in 7 cities including Guangzhou, Dongguan and Foshan, and 82 batches were inspected. The qualified rate of product sampling batches was 53.9%. From the inspection results, there are still many problems in the quality of forging machinery products. The unqualified items are mainly: electrical safety (65 batches), control system (51 batches), safety protection devices (28 batches). The related products of 6 companies including Dongtai Machinery Tools (Dongguan) Co., Ltd. were sampled and qualified, but 22 products were found to be unqualified.
National Supervision and Inspection Report on the Quality of Milling Machines and Drilling Machines in the First Quarter of 2010
This time, a total of 34 milling machines and drilling machine products produced by 34 enterprises in 11 provinces, autonomous regions and municipalities directly under the Central Government in Beijing, Liaoning, Jilin, Heilongjiang, Shanghai, Jiangsu, Zhejiang, Anhui, Jiangxi, Shandong and Guangxi were sampled.
This spot check is based on the requirements of the National Compulsory Standards and related product standards such as "General Technical Requirements for Safety of Metal Cutting Machine Tools" GB15760-2004 and "Mechanical Safety Mechanical Electrical Equipment Part 1: General Technical Conditions" GB5226.1-2002. Leakage, geometric accuracy, winding and entangling hazard of milling machines, drilling machines, limit devices, mechanical overload protection, anti-loose devices, interlocks, clamping devices, guards, start, stop, emergency stop, noise, splash 22 safety and important performance items such as operational reliability, power switch, protective earthing, insulation test, circuit overcurrent protection, motor overload protection, electric shock protection and control transformer were tested. The spot check found that there are 4 kinds of product protection grounding, power switch and other items inspection results do not meet the requirements of relevant standards.
Threaded-connection Rubber Joint
Threaded rubber soft joints are also known as threaded UNION rubber soft joints, threaded flexible rubber soft joints, arbitrary rubber soft joints, and threaded soft joints. Flexible Double Ball Wire Button UNION Rubber Soft Joint This product is composed of inner layer, reinforcing layer and outer rubber layer compound model vulcanized rubber double ball and metal flat union. The middle double ball part is added with a steel ring according to user needs, which has high pressure resistance, high and low temperature resistance, strong corrosion resistance, good flexibility, large displacement and deformation, good vibration and noise reduction, flexible installation and long service life.
Main parameters of threaded rubber soft joint
Working pressure: 0.6Mpa, 1.0Mpa, 1.6Mpa, 2.5Mpa
Working temperature: -40 degrees to 80 degrees (also can process high temperature resistant rubber soft joints)
Nominal diameter: DN20-DN80 Material of main parts
Ball body: NR, CR, IIR, NBR, FKM,
Inner and outer lining: NR, CR, IIR, NBR, FKM, EPDM,
Main frame: Nylon cord
Booster ring: multi-strand copper-plated steel wire
Yuren: Cast iron, forged carbon steel (Q235), stainless steel (201, 304, 316, 321)
The main material of the threaded rubber soft joint is neoprene, natural rubber and EPDM rubber, and the threaded rubber soft joint is resistant to natural changes in weather and can be automatically extended. The threaded rubber soft joint is multi-body protection with mesh steel wire. It can prevent the natural shrinkage of the product and reduce aging and cracking during long-term use, and can replace other telescopic products widely used in power plants, water plants, sewage plants, chemical and metallurgical industries. Another important point is that the rubber soft joint is a green product. There is no pollution to humans and no side effects when using this product.
Can be widely used in hotels, factories, residential plumbing piping systems and circulating water pipes, sanitary pipes, chemical anti-corrosion and refrigeration pipes.
The normal applicable medium is ordinary water with a temperature of 0-60 °C. For special media such as oil, acid and alkali, high temperature and other corrosive and hard textures, the corresponding special-resistant material should be selected for soft rubber connection, and cannot be blindly connected. used or generic.
Threaded-Connection Rubber Joint,Threaded Union Rubber Expansion Joint,Threaded Rubber Expansion Joint,Threaded Expansion Joint
Inner Mongolia Overseas.Trade co.,LTD , https://www.flangevalvejoint.com