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发布时间: 2013 - 11 - 29
The grinder is a national 863 support project in 2008.The machine tool adopts the grinding method which is based on the grinding point cut. It does not need the auxiliary mechanism such as eccentric fixture, indexing device and so on. Using imported spindle system, the maximum speed of CBN grinding wheel can reach 120m/s. We have developed the interpolation software of the crankshaft cutting point tracking and grinding, and the grinding point of the grinding wheel is always following the rotation of the crankshaft to realize the high precision grinding of the crankshaft. The feed of the grinding wheel is driven by straight line, which has the characteristics of high acceleration response. At the same time, the rigidity and the sensitivity of the grinding wheel are improved by using the sel...
发布时间: 2017 - 02 - 28
And the grinding liquid by paper filtering and magnetic separation of water mist and dust; the dust suction device, the operator only need materials up and down, a person can see the number of machine tools, so the production efficiency is high, suitable for all kinds of automobile engine, motorcycle engine and diesel engine production manufacturers.Main structure and technical characteristicsThe bearing structure of high speed motorized spindle is in our own intellectual property and has been successfully used for many years in the high-speed grinding machine "gap cavity hole type oil return throttling liquid hydrostatic bearing on the prototype formed by an improved design. With a good bearing stiffness (up to 340N/ m), high rotary accuracy (radial, axial runout is less than 0.002mm...
发布时间: 2017 - 02 - 28
该设备是2009年国家重大专项支持项目。可以解决工程陶瓷、微晶玻璃、硬质合金、人造宝石晶体等超硬材料、钛合金、不锈钢、镍基铁氧体材料等耐热合金材料以及复合涂层材料等难加工材料轴类零件的精密加工问题,适用于航天航空、国防军工等行业中的特定材料零件的加工。MKG1320超高速数控外圆磨床可配备自主研制的超高速电主轴砂轮架及进口电主轴砂轮架,线速度可高达150m/s。借助AE在线监控系统可实时监测砂轮的磨削及修正工况,为快速正确确定磨削工艺提供可靠依据。自动跟踪定心中心架的采用可大幅提高细长工件加工的尺寸及形状精度,另配合全功能在线量仪可大大提高生产效率,有效降低生产成本。超高速电主轴超高速电主轴采用油冷电机后置动静压电主轴系统。主要由液体动静压轴承系统、主轴动平衡系统、电机冷却系统及高速CBN砂轮组成。       通过液体动静压轴承的优化设计,可保证主轴的平稳启动及高速运转时的主轴刚度。主轴由后置电机直接驱动,通过精确控制转子与定子的同轴度及间隙可有效消除驱动单元给主轴系统带来的扰动。       主轴系统由砂轮架主轴、CBN砂轮及在线动平衡仪组成。砂轮主轴加工后做精密动平衡,为保证砂轮装卸后主轴系统的动平衡,本机采用进口SBS在线动平衡仪对主轴系统进行精密动平衡控制。另外,设计过程中采用有限元法对砂轮架系统及整机作振动性能分析,并通过实验确保砂轮架在工作速度范围内整机不发生谐振。一系列关键问题的解决可保证砂轮架在高速状态下稳定工作。 主轴动平衡本公司MKG1320超高速外圆磨床采用CBN砂轮,当CBN砂轮高速旋转时,其修整状态,磨削状态都无法像普通砂轮磨削和修整时用人工观察并进行控制。在磨削和修整期间,砂轮和工件都会产生一定频谱的噪声,其主要分布在超声波的范围内,与其他外界产生的噪音(...
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"Beauty contest" won the Changsha machine difficult to marry

Date: 2013-10-09
Browse Number: 40

In April this year at the thirteenth session of the Chinese International Machine Tool Exhibition, CNC machine tool cutting teeth Changsha machine limited liability company exhibited shine, broke the monopoly of German companies in the project, instead of rolling, inserting, shaving, grinding and other processing equipment, to solve the problem of traditional gear machining process can be solved and widely the application can be and in the automotive, aerospace, energy and other fields, Changsha is an important representative of local high-end CNC machine tools. But this is the beauty of the winning machine tool products, but suffered embarrassment: Although the intention to buy a lot of enterprises, but has not yet traded a pen.

The machine tool industry as a mechanical industry machine tools, for a long time, high-end CNC machine tools Chinese economic construction, key projects required is mainly dependent on imports, domestic high-end CNC system of the domestic market share of only 5%, while the 95% high-grade CNC system bed required from abroad, functional components of domestic market share of only 30%, China machine industrial upgrading is imminent, but the domestic high-end machine, why has been the market cold?

Present situation:

Core competitiveness is not strong, the low-end production overcapacity

In the machine tool industry, the CNC machine tools to drive the number of axes as the standard, the 3 axis and the 5 axis for the high-end products, more than 5 axis for high-end products. At present, China's machine tools are more than 3 axis of low-grade products.

Unlike the high-end CNC machine tool market is basically controlled by Europe and the United States and Japan, the domestic low-end machine tool market is basically out of the door of foreign competitors.

The reason for this gap, Changsha Machine Tool Co. Ltd. is responsible for that, on the one hand many companies on short-term interests over emphasis on short-term interests, become the main basis for decision-making and resource allocation; on the other hand, users also tend to lower capital investment in technical innovation.

"Part of the domestic purchase of machine tools for users of low precision and quality requirements, the number of products is not much and have to be more urgent, taking into account the input and benefits, they tend to choose low-end machine tools. And affordable, procurement, use, sale are very convenient domestic machine tool naturally become the first choice for these enterprises." Changsha machine tool manager.

Embarrassment:

Domestic high-end CNC machine tool market was cold

Since last year, the domestic machinery industry demand growth slowed down, a lot of touch sensitive machine tool companies have felt, with the transformation and upgrading of China's national economy, the demand of industrialization in the early period of explosive growth is in the past, the various sectors of the equipment level, quality requirements will be increasingly high, the high-end CNC machine tool market will become Chinese the military a hotly contested spot.

In the Changsha machine in the workshop, the reporter saw the NC cut machine teeth shine in the Chinese International Machine Tool Exhibition this year. "Now it is processing the gear for the intended customer." Changsha machine responsible person said, at present this CNC gear slicing machine technology has been very mature, can be directly used for production and processing, showing the purchase intention of business but also many, but still not traded.

"Customers think the price is too high is the main reason." The person in charge said bluntly, but there is no way, we are the key components of this machine are imported from abroad, the cost itself is very high."

Even the simplest parts, once used in precision machines, must reach a certain degree of precision. CNC machine tools required for functional parts, such as bearings, swing head, as well as the grating, the country is in its infancy, can not create a quasi product. The most common screw, guide rail, cutting tools and other components technology is relatively backward, for the commitment to build high-end CNC machine tools Chinese enterprises, not only high-end foreign brands firmly link "card neck", even high quality parts are to be imported, this industry upgrade brought no small obstacle.

Small and medium-sized customers can not afford, and large enterprises do not dare to use. Some large joint ventures, they design early in the production line at the beginning has been abroad for CNC machine tools, if you want to change the "tools", the product can apply is on the one hand, on the other hand the JV Party can not accept is the key." Deputy general manager of Hunan Haijie Precision Industry Co., Ltd. Peng Keli said, "we have encountered such a situation, for those who have the intention to buy customers a trial service, let them feel the benefits of the domestic high-end CNC machine tools, in order to obtain customer support."

Grope:

Recount to get "society"

Crack the development of domestic machine tool industry embarrassment, on the one hand, the major companies to strengthen the hard strength of the main product, on the other hand, the machine tool companies also launched for different customer groups of different levels of configuration of CNC machine tools.

As a Changsha machine ace, broaching machine series has been in the first national sales. "The most common application is in the automotive sector. Last year, Chery made 800 million orders for us within the next three months." Changsha machine limited liability company responsible person said: "like Sany, BYD, Chery, China Geely, gear box, the gear box, the engines are processed by our broaching machine."

Traditional advantages can not be lost, but also to catch up with high-end technology. Haijie precision research and development of CNC8312A CNC high speed camshaft grinder, there are now many enterprises in the use of the military field.

On the other hand, the formation of enterprises as the main


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