Broken bolt extractor is a new type of high-efficiency and simple hand tool. It is mainly used to take out the bolts broken in the threaded holes and various bolts with the failure of the outer hexagon head or the inner hexagon. It is widely used in the mechanical maintenance industry and industrial and mining enterprises. It is an ideal tool for mechanical assembly and t.

The broken bolt extractor sold by the eye lung field is generally composed of a set of drill bits and an extractor body, and sometimes a hinge frame or a set of drill sleeves is also arranged in the tool box. The drill bit is a conventional twist drill for drilling holes in the center of the broken bolt. The extractor body I is a conical object with a reverse spiral made of alloy tool steel and heat treated (as shown in Figure 1).

Bolts may be broken due to excessive erosion or excessive force during disassembly and assembly. The part of the bolt that is left in the body needs to be removed with a broken bolt extractor. When using, first select the appropriate drill according to the diameter of the broken bolt, drill an L in the center of the broken bolt (as shown in Figure 2), and then select the appropriate extractor body into the drilled hole, use the active The wrench or the hand frame clamps the tail of the extractor body and rotates counterclockwise to remove the bolt broken in the body. In addition, if the inner hexagon or the outer hexagon of the bolt fails and cannot be removed, it can also be taken out with this tool.

The broken bolt extractor 5 often has failures such as breakage and chipping of the extractor body, which seriously affects the normal use of the user. Therefore, the following precautions for use are proposed for the shack.

Do not use excessive force when removing the break bolt from the rotating extractor body to prevent the take-up body from tearing. Due to the limitation of working conditions, the diameter of the extractor body is small (the extractor body of the S-small size), and the treatment groove is easy to generate stress concentration, so it cannot withstand large torque. Therefore, when removing the broken bolt, if it is found that the resistance of the rotating extractor body is large, it must not be attacked. Instead, the cause should be firstly found. Generally, due to the eclipse, the loosening agent should be used to remove the loosening agent. Ribs, and then take out the extractor body is a special tool for taking out the broken bolts. Although the material is high in hardness, the initiality is poor, and it is easy to be chipped or broken. Therefore, it should not be used as a punch or a top bar to avoid damage. After use, it should be placed in a special tool box to prevent the tools from interacting with each other.

After the tool is used, it can not be placed in the place where it is easy to rust, so as to avoid the rust blade. This kind of seeding method determines the sowing depth of the ground wheel, the speed of the soil cover and the speed of the locomotive adjusts the sowing depth, and the soil structure changes the sowing depth, such as the ridge height exceeds 15Cm. When the trencher is not in the soil, it is completely covered by the soil cover, which is called sprinkling above the ground level. If it is under drought conditions, there is no rain after sowing. It is difficult to ensure that the whole seedling is released once. In addition, because the seeds are planted on the ground soil (because the fertiliser is used to loosen the seedbed and the opener is not in the soil, the seeds fall on the loose soil layer, and the soil moves up and down), which reduces the effect of water on temperature conduction. In the case of the sowing depth, the seedlings were late compared to the original ridge card and the flat field. Therefore, it is necessary to be cautious in adopting this method. However, it is convenient to change the soil cover to a deep loose rod or a small one for the post-emergence operation, so that the opener is placed in the soil, the ridge height is lowered, and the seeds are dropped onto the wet soil. If the soil is too deep, the fish can be added after the tiller, and the excess soil is removed. It is called deep sowing, heavy fishing and shallow covering soil, so as to realize the existing ridge type and ensure the emergence of seedlings. Limit the speed of the work, otherwise it will affect the quality of the seeding.

(3) Installation and adjustment of the ridge after the flat cropping of the field crops The position of each seed meter and fertiliser is determined according to the designed ridge distance.

Remove all overburden and deep pine rule.

Install the deep-loose ruler after the traction of the wheel and adjust it to below 2cm.

Install the shovel-type shovel used for soybean sowing (wheat strip).

Adjust the ground wheel to the depth when the opener is flat.

Adjust the gear ratio according to the design density.

Note: In order to reduce the modification time of the tiller, the flat seeding and the ridge can be exchanged after the flat sowing. No need for any improvement, but in the flat broadcast assembly, it is necessary to consider the ridge distance when the ridge is made, that is, after one break, that is, the ridge after the flat sowing, the whole row is the flat planting, only after the reduction or the round Deep tape measure and change gear ratio.

The sowing method is not limited, the traction resistance is small, the locomotive efficiency is high, the covering soil is uniform, the ground temperature is high, the seedlings are uniform, and the adaptability is wide.

After the wheel is required, the deep pine rule should be kept in a clear position after the suppression. Each opener assembly must be accurate. (01)