【導(dǎo)讀】采用擠搓式的原理使用板齒進(jìn)行脫粒，板齒呈螺旋均布便于脫粒滾筒。的作用是將夾在玉米粒中的輕雜帶走。與同類產(chǎn)品相比，結(jié)構(gòu)非常緊湊，性能優(yōu)良，操作。十分輕便，安全可靠，而且不占場(chǎng)地，搬運(yùn)存放十分方便，成本非常低。以提高種子發(fā)芽率。能大大的減輕農(nóng)民勞動(dòng)強(qiáng)度，有利于搶趕農(nóng)業(yè)季節(jié)，促進(jìn)農(nóng)民發(fā)家致。富，推動(dòng)農(nóng)業(yè)的發(fā)展，適宜在廣大農(nóng)村推廣應(yīng)用。

　　

【正文】 demands and economic conditions are larger, and so on the hills, the y the midlevels district area and grains, rice growing areas, corn thresher is still widely used. So with the development of agriculture, the corn thresher is still has a very broad market prospect. At present, the coarse grain type corn thresher is not many, only the northeast, north and northwest, some enterprise production of corn, shum and soybean corn thresher. From the production of corn thresher enterprise, at present most economies of scale for small and mediumsized enterprises. But among enterprises due to the differences between production conditions, product specifications and production, product quality is obviously different, can be roughly divided into four categories: one is the production of corn thresher for a long time, the original belong to the designated and backbone enterprise of the industry, its high degree of specialization of production, testing equipment plete, the personnel quality is higher, timely product structure adjustment 黑龍江八一農(nóng)墾大學(xué)畢業(yè)設(shè)計(jì) 30 and new product development, product quality is better. But because the reason such as efficiency, system problems, the proportion of production enterprises in the industry and the capacity is reducing year by year, product range from corn thresher turned to other agricultural machinery products or other products industry. 2 it is able to adapt to market changes, pay attention to technical innovation of enterprise, product yield and quality increase year by year, products in the market share is big, into corn thresher industry vanguard。 3 there is a considerable number of small firms, in particular, some new horse township, individual enterprises, due to the production conditions, the personnel quality and internal management is poorer, raw materials and ponents quality closes nevertheless, product quality is not guaranteed. The enterprise production is not big, but enterprise quantity many, has great effect on the corn thresher market. Four is part of the old enterprises and backbone enterprises due to market, capital and product adjustment, or the threshing machine as the accessory products, or production at BanTingChan state, causing the waste of resources and talent. Look from the general characteristics of the product, because the corn thresher is a seasonal product, influenced by geography, and climate conditions, the average pany is according to the agronomic requirements of local and traditional sales for a single varieties of production. On the market at present basically has the following two models: 1, the short form Short form model at present market share is larger, and appeared a batch of production conditions and process level is quite good enterprise. Such as qiu county in hebei province 黑龍江八一農(nóng)墾大學(xué)畢業(yè)設(shè)計(jì) 31 machinery plant annual output has reached 30000 units, formed a professional production technology, to a famous brand. And on the basis of short form models, some enterprises have opened a tractor as power, in the fields for workplaces, mobile and flexible, convenient field of new models, adapted to the midlevels, hilly region thresher development needs. 2, duplex, half duplex and feeding machine This kind of machine while the market share is not big, but its quality is relatively good. Its production enterprise mostly pay attention to adjust product structure, strengthen quality management, some products into the international market. The corn thresher product quality in China is not optimistic since 1992, the state bureau of technical supervision of corn thresher held several spot check the quality of the products, from the general trend of development, product sampling percent of pass to increase year by year, from 1992 to 1992 sampling qualified rate is respectively 50%, %, %, %, % and %. But on the whole, the quality of corn thresher is not optimistic, sampling percent of pass at low levels, national field on mechanical and mechanism of small tools, inspection, director of the center for WeiKeQin pointed out that the main problems of corn thresher product has two aspects: one more corn thresher, product unsafe hidden danger is high speed rotating machinery, the transmission part is located in the body of the lateral, working condition is very bad, so the product in the corn thresher safety protection device, feeding device, safety warning device, safety instructions Safety requirements of the 黑龍江八一農(nóng)墾大學(xué)畢業(yè)設(shè)計(jì) 32 book, as well as the strength of the bolt used in threshing cylinder parts such as safety and quality, in strong and have clear requirements in the relevant standards. From corn thresher safe in the second quarter of this year the situation of the national quality supervision and spot checks and market research, the serious security hidden danger. Many enterprises factory main table is: the one is not equipped with protective device, some enterprises to cope with examination, only a few wears protective device prototype, but much to market without protective devices. The second is the risk of a significant number of enterprise products parts without warning marks or warning marks is not standard。 3 it is written in the instruction manual, some enterprise prospectus no safety operation, safety, security, maintenance, etc. Some even have this aspect of the paper, but the capacity is not perfect, it is difficult to guide farmers security operations. Four is about safety feeding device, although most of the enterprise39。s product is equipped with a device, but does not accord with a standard to ask more. As a result of the existence of these problems, a lot of hidden trouble, the safety of users to farmers accident also occur frequently. In 1997, for example, produced by a factory in hebei corn sheller with no preparation