Wear-resistant, low power consumption, high efficiency stubble cutter

At present, the cutting methods of the stubble crushing and returning machine belong to the combination of striking and cutting, and the striking is the main method [0. The knives used are generally from 6~Made of 7mm 65Mn steel plate, the rotation speed of the cutter shaft is generally 500r/min left or right or even higher, the speed is too low will affect the quality of work.

65Mn steel has high toughness and fairly good wear resistance. but since the tool long-term direct contact with soil and sand during work, due to the workload large impact and friction of the soil cause severe wear and tear, resulting in life expectancy is severely shortened. The cutter operation of general wheat stubble returning machine, the farming area is only about 70hm", and the cutters of the corn stubble returning machine, the working area is only about 40hm'. If the blade is not worn in time.

It will be difficult to ensure the chopping quality and increase power consumption if it is replaced in a timely manner. At present, the above-ground straw returning machines mostly use high-speed rotating slingers. The knife (mostly oblique cutting L-shaped) cuts off the stalk in reverse, and the stalk keeps hitting the cover plate, and being cut and broken many times, the broken stalks are on the upper part of the knife roller throw out. Machines for underground stubble crushing, such as rotary stubble removal, Machine tools such as vibration stubble removal, row stubble removal, and compound stubble removal have also been developed one after another. issued and put into use. The research of knives has gone through from rotary tiller, chopping the development process of knives, straight stubble cutters to curved stubble cutters and whip knives, the stubble cutting performance of the knife is continuously improved, and the resistance and power consumption are obviously reduced. Among them, the straight-edged stubble cutter adopts a cutting method mainly for chopping and supplemented by sliding cutting. Cutting method, there is sliding cutting in the cutting process, so that the sliding cutting angle changes conducive to stable chopping. Due to the simple manufacture of straight-edged knives, from and be widely used.

2.1 Basic stubble blade
According to the shape, the knives mainly include straight knives, L-shaped and modified knives. Progressive knives, T-shaped knives, hammer claws and other categories. Among them, the L type and its modified The feed knife is mainly used for corn, sorghum, cotton and other crops. The chopping of stalks is mainly based on blow chopping, and cutting is for paving. Sharpness is not required.