Non-tapping screws are machine Screw, the pieceworker to be fastened must be tapped with taps in the screw hole in advance to match the screw threads.
The difference between tooth screws and other screws depends on whether they can be used together with nuts. Tooth screws can be used with nuts. And relative to the screws of other teeth, there are self-tapping screws. The nut of this kind of screw has no bow teeth. As for the standard teeth and fine teeth are only different pitch, it is the nut of the machine screw
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Megler is located in northwestern Switzerland, close to Germany. It was founded in 1929 by the brothers Magerle Karl and Magerle Max. The initial product was a medium-sized diesel engine. They found that many of the grinders bought were not easy to use during the production process. Started designing, trial-making grinding machines, and acquired a local (Fitz Wunderli AG) grinding machine company in 1941, and began the development of grinding technology and grinding products. More than 70 years have passed, and the product design concept of Megele's customer-based application has not changed. This unchanging base has also established the world's top brand of flat and forming grinding machines.
The current Megler company has about 130 people and annual sales of around 50 million euros (about 350 million yuan). In the past three years, the company's sales in mainland China have increased by nearly 30% every year, and in 2014 it reached 15 million euros. . The factory covers an area of ​​8,000 square meters. There is no office building, the factory building is about 100 meters long, parallel four spans, and the layout is very compact, with a maximum lifting capacity of 30 tons. There are almost no machining equipment in the workshop, and the number of gates, such as rail grinding and coordinate boring, seems to be quite old, but the maintenance is very good. Most of the parts and components of the products are processed by the external committee. The large parts such as the bed and the box are provided by the professional casting company in the Czech Republic for a long time. High-precision joint surfaces such as guide rails and pallet surfaces are still hand-scraped to ensure contact accuracy, stiffness and lubrication. We only saw the assembly and final assembly of the core components of the machine tool on the shop floor. Megele's factory facilities and processing and testing equipment are not very modern or even outdated, but their water-cooled thermostatic spindles and closed hydrostatic guide technology are well known in the industry, and users in all fields are also recognized. The water-cooled thermostatic spindle can ensure the thermal stability of the machine tool spindle. The closed hydrostatic guide rail achieves non-wear, high precision and high rigidity, which makes the machine tool precision and stability reach a very high level. These two technologies are not unique to Müller, but they are really good and can be used well. There are really few in the world.
From the history of product development, Megler has been focusing on medium-sized flat and forming grinding machines. It is known for its high grinding efficiency and high precision. During the Second World War, the world's first hydraulic servo-driven surface grinder was developed. In the 1950s, their flat grinding was sold to China, and so far the machine tools are used as finishing equipment. Nowadays, the company's single-function products are becoming less and less. Most of the orders are high-performance grinding systems and flexible processing units produced according to customers' individualized and flexible requirements, providing customers with turnkey solutions. These tailor-made grinding systems are modular in design, and the structure and manufacturing process of the surface grinders and forming grinders that Megler has accumulated over the years has laid a solid foundation for these modular systems. Various specifications of workbench, round table, turntable module, vertical slide table, slide block module and horizontal or vertical installation of single and multiple spindle system modules, combined with tool magazine, inspection, auxiliary processing module and Robots, robots and other loading and unloading systems, with these different types of machine configurations, can be combined to provide the best solution for users.
In the workshop, we saw an aero-engine blade disc finishing flexible line that is undergoing final assembly and commissioning. The line consists of two grinding unit, one set of workpiece self-centering clamping mechanism, one three-coordinate detecting device and two five The joint robot is composed of. According to Andrew Kemp, if the processing unit is officially put into use, it will change the current manual or semi-automatic state of aero-engine manufacturing, and aircraft engine manufacturing is likely to achieve fully automated production line.
There are not many fields in which Megler is involved. The products for aero-engine blade discs, casings, energy equipment, turbine wheel shafts, and large-blade processing account for 50% of its annual sales. Harbin Turbine and Dongfang Electric in China. Shanghai Electric has used their products. In addition, the automatic grinding line products specially designed for robot joints and electric vehicle steering gears have seen an increase in market sales in the past two years. Megler has designed a complete set of proven solutions for the machining of the core components of the robot joint (high-precision cycloidal pinwheel reducer), the eccentric disc, the eccentric shaft and the end gear disc. Manufacturers of major robotic joint reducers in Europe and Japan have orders, and in 2015 they sold two lines in mainland China. The automatic line developed for high-end electric vehicle steering gear racking completely changed the traditional broaching process of the steering rack. Due to the electric servo-driven steering of high-end electric vehicles, the requirements for the accuracy and roughness of the steering rack are greatly improved. The automatic grinding line provided by Megler uses high-strength grinding with a grinding capacity of 5-9mm, 22- Grinding one in 31 seconds, almost the same as the broaching beat, but the machining quality can't be achieved by broaching. Now Tesla's steering gear rack is the automatic machining of the grinding.
From the technical department of Megele, the company's product development concept based on customer application can be reflected. In addition to the design and development department, the company also has a customer technical advisory department that directly accepts the leadership of the company's president, is responsible for the process technology exchanges with the customer in the early stage of the project, determines the solution, forms the overall structure of the product module combination, and carries out the product on behalf of the customer. Performance and quality supervision and integrated management of the project.
Megler is part of United Grinding, and domestic companies may be more familiar with the brand SCHLEIFRING. At the EMO show in Hannover in 2013, “Slain Pro†was officially renamed as “ Joint grinding". The United Grinding Group has eight top grinding machine brands, and Megel is entering the group earlier. The other seven are: STUDER in Switzerland, EWAG and Schaudt in Germany, MIKROSA, WALTER, BLOHM, Joan JUNG. The group company is responsible for the research of advanced technology and grinding common technology, the coordination of products and markets of various enterprises, brand planning and asset investment management, so that the Group and its subsidiaries can develop steadily and harmoniously. Currently, the Joint Grinding Group is headquartered in Bern, Switzerland, with a total of more than 2,000 employees.
The products of these 8 grinding machines are divided into three categories: flat and forming grinding machines, round grinding (inside and outside grinding and centerless grinding) and tool grinding machines. Megler, Boryeong and Jung are both part of the flat and forming grinder team, but their product mix and service segment are different. Megele's flat forming grinding machine is a medium and large-sized product with modular design. The guide rail adopts closed static pressure, which mainly meets various special requirements of batch products in aviation, automobile, pump and hydraulic parts industries; The product adopts linear guide rails and the specifications are medium-sized. It is mainly used for single-piece and small-volume production, such as mechanical engineering, tools and mold processing. Jung's products are small and medium-sized manual and CNC grinding machines for V-shaped guide rails, which are suitable for mold processing. Stewart, Short and Mick Rosa belong to the round grinding team, Stewart focuses on internal and external grinding; Schott is a camshaft, crankshaft grinding and gear grinding machine; Micosa is heartless. Ivag and Walter produce precision tool grinding. In 2008, they set up a production plant of 16,000 square meters in Shanghai Taicang. In addition to the Shanghai factory, they also have branches in Beijing, Chongqing and Guangzhou. There are now more than 200 employees in the mainland.
In fact, the Joint Grinding Group is only an asset and brand management company. It is a sub-group under the German Korber Group. The actual asset owner of Megele and other subsidiaries is the Körber Group of Germany. Headquartered in Hamburg, Germany, the Körber Group was founded in 1959 as a foundation established by the death of a tobacco-based capitalist (Dr. Kurt A Korber). At present, there are 7 real estate industries in tobacco machinery, papermaking, automatic control, logistics, machine tools, medical equipment and daily necessities packaging. The global employees are about 11,000 people. The total turnover in 2013 was 2.2 billion euros. The profit rate is 10.1%, and the financial status is healthy and stable. Because it is a non-profit organization, the Korber Group will not be eager for quick success, killing chickens and taking eggs, and will maintain a project investment of 17 million euros per year for its subordinate industries. It has created a long-term stable operating environment and development space for subsidiaries.
The most in-depth study of Megele is their keen sense of smell and grasp of market opportunities. Of course, this is supported by a high level of product and technology heritage, and it is also starting from the business philosophy of doing everything possible to improve the competitiveness of customers' products. Another feeling is that so many of the world's top grinder companies have gathered in a non-profit foundation under the capital operation, which should be an inspiration to us. At present, in the period of adjustment of the domestic economic down market, it is impossible to find and seize opportunities in the unpredictable international market. It is impossible to achieve the power of a small and medium-sized enterprise alone.
Compared with these top companies in the world, we do have a big gap. We start late and have less experience. We must carefully ponder the road they have traveled and try to avoid further detours.
See the world's top grinding companies thinking about the development of Chinese enterprises
Abstract In October 2015, the China Machine Tool & Tool Industry Association and the Executive Vice President and Secretary-General Chen Huiren and Executive Vice President Wang Liming visited Switzerland's Magerle Machine Tool Company. Ander, Asia-Pacific Sales Manager, Megall...
In October 2015, the China Machine Tool & Tool Industry Association and the Executive Vice President and Secretary General Chen Huiren and Executive Vice President Wang Liming visited Switzerland's Magerle Machine Tool Company. Mr. Andrew Kemp, Sales Manager of Asia-Pacific, Megler, and Mr. Liu Xin, Sales Director of United Grinding Shanghai, accompanied us to visit the factory and introduced the company's basic situation and development history.