How Does a Disc Harrow Perform Land Leveling Operations?

I. Technical requirements for disc harrow operation

(1) The rake depth meets the local lawn planting requirements and is even.

(2) During homework, there should be no missing rake or soil blockage.

(3) After homework, it is required that the surface and ditch bottom be leveled, the soil be loose and fragmented, and the residue be well covered.

II. Adjustment of the disc harrow before operation

After the disc harrow is attached to the tractor, the following adjustments are usually required:

(1) Adjust horizontally in front, back, left, and right directions. Adjust the length of the hanging upper pull rod and the height of the left and left suspension points.

(2) Partial traction adjustment. Mainly adjusted by adjusting the connection points, front and rear rake angles, and other methods.

(3) Adjust the harrow depth. The circular disc harrow mainly relies on the self weight of the equipment to enter the soil, and the depth of the harrow is adjusted by the inclination angle. As the deflection angle increases, the harrow depth will correspondingly deepen; On the contrary, the harrow depth becomes shallower. If the required harrow depth cannot be achieved by adjusting the deflection angle, additional weight must be added to complete the task.

(4) Angle adjustment. By changing the position of the crossbeam of the harrow group relative to the harrow frame, the angle of the rake group and the unit's forward direction can be altered.

III. Operation method of disc harrow

When using a disc harrow, there are three types of harrowing methods relative to the direction of plowing the soil: straight harrow, inclined harrow, and horizontal harrow. When raking, the direction of the rake is parallel to the plowing direction, resulting in low working resistance. However, the effect of crushing soil and flat land is poor, making it suitable for easy soil. When raking horizontally, the direction of the rake is perpendicular to the plowing direction, which has a good effect on breaking soil and leveling the ground. However, the machine has high vibration, many turns, and low efficiency. When using a diagonal rake, the direction of the rake is about 45 degrees from the plowing direction, and the effect of crushing soil and leveling is between that of a longitudinal rake and a transverse rake, with a complex walking path.

Shuttle shaped and loop shaped rakes belong to the category of straight rakes or horizontal rakes, suitable for using rakes as a substitute for tillage or shallow tillage for stubble removal. Cross raked land belongs to inclined rakes, and this method is commonly used for large-scale plowed land. It has good soil crushing and leveling effects, but the walking route is complex and prone to heavy rakes and missed rakes.

IIIV. Safe use of disc harrows

(1) The lifting and lowering of the hanging rake should be slow and smooth, and excessive force is not allowed. It is not allowed to use human weight to force the rake blade into the soil. The transfer of land parcels during homework should be done slowly.

(2) Tractors with harrow are not allowed to make sharp turns during operation, and towing rakes are not allowed to reverse. When turning or reversing with suspended rakes, the rakes must be raised before proceeding.

(3) The safety pin on the traction rake pull rod is only allowed to be processed and replaced with low-carbon steel material, and it is not allowed to replace it with other materials or change the size arbitrarily.

(4) Hard objects such as stones and iron are not allowed to be used to weight the weight box of the rake, and passengers are strictly prohibited from riding on the weight box and rake.

(5) When serious soil blockage and dragging occur, the cause should be analyzed and eliminated, and forced operation is not allowed.

(6) When the rake is working near the edge of the ground, the rake blade is not allowed to touch the stone ridge, etc.

(7) When transferring land or transporting short distances, the working mechanism of the rake must be raised to the highest position and locked to keep the agricultural tools in the transport position, and the limit chain must be tightened. During transportation, no one is allowed to sit or place heavy objects on the rake. Prohibit high-speed driving and sharp turns. Long distance transportation requires loading and transportation separately or as a whole with a scraper, and it is not allowed for the scraper to transport on its own.

(8) When replacing the rake blade or troubleshooting the rake, the tractor should first turn off the engine or release the hook.

(9) After parking, the suspended equipment should land on the ground and should not be parked in a suspended state frequently.