Manufacturing method of bucket tooth and applied mould thereof

Abstract

The invention provides a manufacturing method of bucket tooth and an applied mould thereof. Liquid bucket tool material is poured into a material storage cavity, a core puller is utilized to push a tooth cavity core and a pin hole core into a bucket tooth mould cavity; an upper mould and a lower mould are closed, and pressure is maintained to be 3000-15000kN; the lower cylinder of a hydraulic cylinder drives a pressure head to push the liquid bucket tooth material in the material storage cavity to be filled with the bucket tooth mould cavity at the linear speed of 10-100m / s, pressure is increased to be 500-5000KN, and pressure is maintained until the material is completely solidified. The core puller is utilized to pull out the tooth cavity core and the pin hole core; the lower cylinder drives a material tray to push an ejector rod to eject the bucket tooth and residue material, heat treatment is carried out, thus obtaining the bucket tooth of the invention; the lower cylinder returns, the material tray pulls the ejector rod and the pressure head to be descended and reset, and next operating cycle is executed. Material utilization is 85-95%, strength is improved by 20-30% compared with a sand-cast bucket tooth, impact toughness is improved by 15-25%, energy consumption is reduced by 20-30%, cost is reduced by 15-30%, and hour output can reach 150 pieces. Qualified bucket tooth can be manufactured without a dead head or sand mould.

Description

technical field [0001] The invention relates to a method for manufacturing bucket teeth, which is suitable for manufacturing bucket teeth for construction machinery such as excavators and bulldozers. Background technique [0002] Bucket teeth are wear-resistant and vulnerable parts used in construction machinery such as excavators and bulldozers. It includes basic parts such as tooth roots, tooth chambers, pin holes and tooth tips. In the prior art, due to the poor forging performance of the bucket tooth material, its manufacturing methods are mainly sand casting, precision casting, lost foam casting and other casting methods. Their common feature is that the qualified liquid bucket tooth material smelted in the melting furnace is It is poured into the sand mold under the action of gravity, and cooled and solidified under the action of gravity. The shape of the bucket tooth is formed by the disposable sand mold, and the pin hole and tooth cavity are formed by the disposable ...

AI Technical Summary

Problems solved by technology

The remelting process will consume electricity, labor and auxiliary materials again, resulting in burning and waste of materials, which will increase the cost

[0004] (2) There is serious dust pollution in the preparation of sand molds, sand cores and grinding and cleaning, which is easy to cause silicosis

In addition, when the precision casting method is used to manufacture bucket teeth, a large amount of waste water and irritating odors are discharged during the process of wax pressing and shell making; when the lost foam casting method is used to manufacture bucket teeth, there is also waste gas discharged from the gasification of the plastic mold during the pouring process. bad environment

[0005] (3) Due to the slow cooling rate of the sand mold, the internal structure of the bucket teeth is coarse, and the material properties are difficult to fully exert, resulting in waste of materials

[0006] (4) The dimensional accuracy of the tooth cavity and pin hole formed by the sand core is low, and it is often scrapped because the matching relationship with the tooth seat or pin does not meet the requirements

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