WO2015143918A2

WO2015143918A2 - Self-whetting cutting disc blade and manufacturing method therefor

Info

Publication number: WO2015143918A2
Application number: PCT/CN2015/000074
Authority: WO
Inventors: 张安全
Original assignee: 张安全
Priority date: 2014-02-08
Filing date: 2015-02-02
Publication date: 2015-10-01
Also published as: WO2015143918A3; CN104823596A; CN104823596B

Abstract

The present invention relates to a self-whetting cutting disc blade for a harvester and manufacturing method therefor. Existing cutting disc blades all have finished edges, or have different directions for cutting teeth and movement, and do not self-whet. The new blade has arced ridges that are concentric with the cutting disc axis. The arc on each point of the ridge has the same rotation direction as the point. The blade can self-whet. The reciprocating cutting devices on harvesters in the world have already replaced the blades having finished edges with self-whetting blades. Self-whetting blades having concentric arced ridges can replace blades having finished edges for cutting discs. As figures indicated, several slanted iron pieces 2 are distributed evenly and fixed on a disc 3 at places of equal distances from the center. The bottom angle β of a slanted iron piece and the blade angle α of the blade are equal. Blades having finished edge 1 are fixed on the slanted iron pieces 2, such that the positions of the edges of the blades are the same as on the cutting disc during operation and are of equal distance from the disc. When the disc moves on a machine tool, an operating cutter can process on the edge side M of the blades and create blades having concentric arced ridges.

Description

Self-sharpening disc cutter blade and manufacturing method thereof

Technical field

The invention relates to a harvester self-sharpening disc cutter blade and a manufacturing method thereof.

Background technique

Currently used disc cutter blades are commonly used in three types. The rectangular shape is 1 as shown in Fig. 1, the trapezoidal is 2 as shown in Fig. 1, and the curved one is 3 as shown in Fig. 1. They are all light edges and are used very much. It becomes dull for a short period of time, the cutting resistance increases, the energy consumption increases, the mechanical advance speed slows down, and the efficiency decreases. The cutting of the crops has a tearing phenomenon, which reduces the germination rate of perennial sugar cane and caragana in the coming year and reduces the yield. For a long time, research institutes in universities and colleges have done some research. For example, the blade of the Caragana harvester compound cutter developed by Ma Yongkang of Shanxi Agricultural Mechanization Technology Extension Station is a diagonal fan type as shown in Fig. 2. The helical teeth on the blade surface and the angle teeth with a diameter of 45 degrees are linear. The advantages of saw blade cutter and disc cutter are more labor-saving and can prolong the service life, but there is no self-sharpening effect. (This paragraph is from the Journal of Shanxi Agricultural University, 2006, Issue 2, Journal of Agricultural Machinery, Vol. 38, No. 7, July 2007)

Summary of the invention

The newly developed self-sharpening disc cutter blade has an arc-shaped tooth pattern concentric with the cutter disc shaft. A commonly used rectangle has a rectangle as shown in FIG. 3, a trapezoid as shown in FIG. 3, and a curved shape as shown in FIG. At work, the movement speed of each point on the tooth is the same as the arc direction of the point. It has the effect of self-sharpening, and it does not need to sharpen the knife during work, and it always maintains a sharp state. In reciprocating cutting devices for harvesters worldwide, self-sharpening blades have long replaced light-blade blades. Self-sharpening disc cutters can also replace light-edge disc cutters in the harvesting of thick stalk crops such as sugar cane, caragana, corn, ramie and reed. The supported disc cutter has a rotational speed of 6-10 m/s, and the reciprocating cutting device has a cutting speed of 1.5 m/s. The use of a self-sharpening disc cutter instead of a reciprocating cutter can improve the forward speed and efficiency of the harvester. The vibration of the rotating cutter head is small, so that the harvester works smoothly.

DRAWINGS

Figure 1 shows three types of light-blade disc cutter blades

Figure 2 shows the composite cutter diagram developed by Ma Yongkang.

Figure 3 is a diagram of three self-sharpening disc cutter blades

Figure 4 is an explanatory diagram of the processing method of the self-sharpening disc cutter blade

Figure 5 is a diagram illustrating the processing method of the self-sharpening disc cutter blade 2

detailed description

Processing Method 1: As shown in Fig. 4, a plurality of oblique irons 2 are fixed on the disc 3 (or on the rotating table), and the center of the circle is evenly distributed. The base angle B of the inclined iron is equal to the blade angle α of the blade. As shown in the figure, the optical blade 1 is fixed on the inclined iron 2 so that the blade edges and the disk surface are equidistant, the distance between the outer end of the blade and the core is equal to the radius of the cutter disk, and the position of the blade on the disk And the cutting blade edge is in the same position as the cutter head. Thus, the blade face M is parallel to the disk face. The disc mounted on the machine tool (or table) rotates, and the tool can machine the blade with the concentric arc-shaped tooth on the M surface. It is also possible to first machine a blade of concentric curved teeth to punch out a curved toothed blade. The figure takes a rectangular blade as an example, and the others are similar.

Processing method 2: As shown in FIG. 5, the position of the light-cutting blade 1 and the center of the circle and the diameter are fixed to the disk 2 as in the case of operation, and the machining tool 3 is mounted on the shaft and the disk 2 intersects with the cutting blade edge. The α is equal, perpendicular to the cutting edge, and the axis of the disk 2 intersects the disk 4 on the plane of the beveled surface M, which is the common center of the disk 2 and the disk 4. Thus, the angle between the plane of motion of the machining tool and the plane of the disk 2 and the edge angle α of the cutting blade, the plane of motion of the tool and the slope M of the blade edge are parallel, and the machining tool can be rotated around the axis to be machined on the blade bevel M. A curved tooth pattern concentric with the disk 2. The two blades on the figure are used for positive and negative two cutters.

Claims

Harvester self-sharpening disc cutters are similar to ordinary disc cutters in that they have a high cutting speed, stable rotation and strong cutting force, and are suitable for cutting thick stem crops such as sugar cane, corn caragana, reed, Ramie, sorghum, soybean, cotton swab, the difference is that the self-sharpening disc cutter blade has a curved tooth pattern concentric with the cutter disc, and the movement direction of each point on the tooth flanks and the arc direction of the point when the cutter head is working Consistent, self-sharpening effect, the blade can be kept sharp without grinding in the work. The self-sharpening disc cutter with support can also be used for harvesting rice and wheat. The cutting speed of the supporting disc cutter is 6 -10 m / s, reciprocating cutting speed of 1.5 m / s, with the self-sharpening disc cutter can greatly improve the speed of the harvester forward.
Method for manufacturing a self-sharpening disc cutter blade 1: uniformly fixing a plurality of oblique irons on a disc (or a rotating table), the distance between the outer end and the center of the iron block is equal to the radius of the cutter disc, and the inclined iron The acute angle formed by the inclined plane and the plane of the disc is equal to the edge angle of the blade, and the optical blade is fixed on the inclined iron so that the slope of the blade edge is parallel to the disk surface, so that the distance between the outer end of the blade and the center of the disk is equal to the cutting edge. The radius of the cutter head, the distance between the blade edge and the disc are equal, the position of the blade edge and the cutting blade edge are the same at the position of the cutter disc, the disc is mounted on the machine tool, the disc or the rotary table is rotated, and the working tool can be inclined at the blade The curved toothed blade which is processed concentrically with the disc on the blade surface can be processed by the method of turning and milling, or the blade die which is processed by the upper method can be processed by the stamping method of the concentric curved tooth pattern, the above description is Rectangular blades are an example, and other shapes are similar.
The processing method of the self-sharpening disc cutter blade 2: the optical blade cutting blade and the center of the circle and the diameter position are fixed on the same disk as the working, and the machining tool is placed on the axis of the rotating shaft and the cutting blade, and the blade edge angle is intersected. Equal, perpendicular to the cutting edge, and the disc axis of the cutting blade is placed on the disc on the plane of the bevel of the cutting blade. The intersection of the two disc axes is the common center of the two discs, so that the moving plane of the machining tool and the plane of the cutting blade are The angle of the angle and the cutting edge of the cutting blade are equal, parallel to the inclined surface of the cutting blade edge angle, so that the machining tool rotates around the axis to form a curved tooth pattern concentric with the cutting blade on the oblique blade surface of the cutting blade.