Double end face grinding machine patent technology were reviewed

In 2018 - double end face grinding machine patent technology 12 - 14 Yang Sushuang NiuYongShan ( The collaboration of the state intellectual property office of patent examination center of hubei province) Abstract: the double end face grinding machine is widely used high efficient processing equipment, belonging to the plane grinding machine. In this paper, the patent literature at home and abroad about the technology statistical induction, focus on combing the domestic various technology branch of patent development in this field. Key words: double end face; Plane grinding; Grinding machine; Patent 1 double end face grinding machine technology development grinding workpiece surfaces using grinding tool grinding machine, surface grinding machine is mainly used for grinding the workpiece surface, which includes a double end face grinding machine is to use two grinding head grinding wheel end face grinding workpiece at the same time two parallel plane. The development of double end face grinding machine, early in 1904, about double end face grinding machine patent US766403A is put forward, in 1912 the first double end face grinding machine also makes success. But due to the double end face grinding machine on the artifacts to be processed is more, its application is not widely before 1958. By the middle of the 20th century, with the rapid development of automobile industry, double end face grinding machine industry to grow up. Due to technical development determines the relevant patent application, double end face grinding machine in different periods of patent application is as follows: 1904 - Less double end face grinding machine patent filings in 1958, 1958 - 1995 the number of double end face grinding machine was increased, since 1996, although the number of double end face grinding machine has a floating, but overall is a sharp increase trend. 2 double end face grinding technology evolution of domestic routes in 1959, although our country began to develop double end face grinding machine, but in order to meet the demand of domestic development, China is constantly improving the double end face grinding machine performance, efforts to advanced technology. 2. Double end face grinding machine of domestic development of 1985-1 In 2005, the domestic double end face grinding machine patent applications has been in a unit digit; Since 2005, with the increase of demand for cars, double end face grinding machine of patent filings to dramatically increase trend. At the same time 1985 - During the 2005 patent applications, to apply for overseas accounted for 75% of double end face grinding machine total filings. Since 2006, the domestic application basic growth straightly, abroad application in China than before although increased, but foreign applications in China accounts for only 12% of double end face grinding machine for all applications. 2. 2 double end face grinding technology evolution of domestic route double end face grinding machine is mainly divided into horizontal spindle double end face grinding machine and vertical double end face grinding machine two broad categories, according to the workpiece feeding way is divided into disc type, through type, reciprocating, oscillating four kinds of technical means, figure 1 for the evolution of double end face grinding machine main technical branch line. 2. 2. 1 horizontal double end face grinding technology patent CN2070659U evolution route is founded in 1990 by RuShan County machine tool plant application, the patent relates to a kind of non uniform horizontal spindle double end face grinding machine. Subsequently, nanjing NingQing tool technology research institute co. , LTD. In 2005, put forward for grinding of two end face is not parallel to the workpiece hydraulic double patent CN2910471Y plane grinding machine. In order to ensure the accuracy of the grinding wheel dressing and grinding of high precision, guilin wide lu digital measurement and control co. , LTD. In 2010 the patent CN202192512U involved can automatically by the computer real time control of double end face grinding machine for grinding wheel Angle, feeding, to ensure the correctness of the grinding wheel dressing and grinding precision. In 2013 involved in multi-axis nc grinding machine grinding head combination of double end face of patent CN203141257U to further improve the machining precision of workpiece, the patent of the double end face grinding machine by multistep indexing rotary table on a clamping workpiece grinding for many times, reducing the disassembling work-piece error, at the same time greatly save the labor. 2. 2. 2 disc type feeding way evolution of technology route CN1933940B is put forward in 2004 chip clamping device for double sided lapping machine patents, the involved chip feeding way. CN201020646Y for double end face grinding machine is put forward in 2007 by the tray of the patent of tensioning device, since the patent, and the multiple patents about the tension of raw material. CN201168901Y is put forward in 2008 the patent of double end face grinding into continuous feeding device, its laid the foundation of double end face grinding machine to the automation development. CN103878651A is in 2014, the application of double end face grinding machine for special VAT on the device's patent, the feeding device is improved, and improve the stability of the whole structure. 2. 2. 3 through type feeding way evolution of technology route in the process of the evolution of double end face grinding machine feeding method, the original patent was CN2494248Y that appeared in 2001, it involved a link type automatic feeding way. Then, in 2008 to apply for patent CN201399707Y is through the double end face grinding machine sprocket feed, can adjust arbitrarily through the access to the channel spacing, implementation specifications variety of workpiece grinding. Southwest guizhou tools co. , LTD 2012 patent CN202878041U recorded a new workpiece feeding device, the feeding device is mainly used for conveying flat shape of the parts, then many patents are more improvements of this patent. 2. 2. 4 reciprocating feeding way of technology evolution route in order to obtain stable operation, high processing efficiency, and can realize the cross shaft, the rotor type double end face grinding machine grinding workpiece, rushan city tigers machine tool manufacturing co. , LTD. In 2014, put forward different from that of the through type and disc type patent CN203887643U reciprocating feeding device. 3 summary based on the situation of patent protection of double end face grinding, can be found that the double end face grinding technology is along with our country economy, particularly the rapid development of automobile industry and more mature, but the technology development has no end, double end face grinding technology also has many shortcomings, this needs perfecting, thus stride forward towards the direction of the smarter and more efficient. Source: 'science and wealth' 9, 2017